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WO2025108285A1 - Appareil de freinage électromécanique pourvu d'un réducteur encastré, système et véhicule - Google Patents

Appareil de freinage électromécanique pourvu d'un réducteur encastré, système et véhicule Download PDF

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Publication number
WO2025108285A1
WO2025108285A1 PCT/CN2024/133080 CN2024133080W WO2025108285A1 WO 2025108285 A1 WO2025108285 A1 WO 2025108285A1 CN 2024133080 W CN2024133080 W CN 2024133080W WO 2025108285 A1 WO2025108285 A1 WO 2025108285A1
Authority
WO
WIPO (PCT)
Prior art keywords
brake
rotor
planetary gear
stator
motor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/CN2024/133080
Other languages
English (en)
Chinese (zh)
Inventor
毛艳
闫柯宇
倪辉
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Huawei Digital Power Technologies Co Ltd
Original Assignee
Huawei Digital Power Technologies Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Huawei Digital Power Technologies Co Ltd filed Critical Huawei Digital Power Technologies Co Ltd
Publication of WO2025108285A1 publication Critical patent/WO2025108285A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D55/00—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes
    • F16D55/02—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members
    • F16D55/22—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads
    • F16D55/224—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a common actuating member for the braking members
    • F16D55/225—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a common actuating member for the braking members the braking members being brake pads
    • F16D55/226—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a common actuating member for the braking members the braking members being brake pads in which the common actuating member is moved axially, e.g. floating caliper disc brakes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
    • B60T13/74—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with electrical assistance or drive
    • B60T13/746—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with electrical assistance or drive and mechanical transmission of the braking action
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D65/00—Parts or details
    • F16D65/14—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position
    • F16D65/16—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position arranged in or on the brake
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D71/00—Mechanisms for bringing members to rest in a predetermined position
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2121/00—Type of actuator operation force
    • F16D2121/14—Mechanical
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2121/00—Type of actuator operation force
    • F16D2121/18—Electric or magnetic
    • F16D2121/24—Electric or magnetic using motors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2123/00—Multiple operation forces
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2125/00—Components of actuators
    • F16D2125/18—Mechanical mechanisms
    • F16D2125/20—Mechanical mechanisms converting rotation to linear movement or vice versa
    • F16D2125/34—Mechanical mechanisms converting rotation to linear movement or vice versa acting in the direction of the axis of rotation
    • F16D2125/40—Screw-and-nut
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2125/00—Components of actuators
    • F16D2125/18—Mechanical mechanisms
    • F16D2125/44—Mechanical mechanisms transmitting rotation
    • F16D2125/46—Rotating members in mutual engagement
    • F16D2125/50—Rotating members in mutual engagement with parallel non-stationary axes, e.g. planetary gearing

Definitions

  • the present application relates to the field of vehicles, and in particular to an electromechanical braking device with a built-in retarder, an electromechanical braking system and a vehicle.
  • the electro-mechanical brake uses a motor and a mechanical transmission mechanism to drive the brake.
  • the electro-mechanical brake has the characteristics of simple structure, sensitive response, stable load transmission, and no need to set up hydraulic pipelines, and has a high transmission efficiency.
  • the electro-mechanical brake also has a trend of miniaturization to adapt to the wheel side space of the vehicle.
  • the present application provides an electronic mechanical brake device with an embedded reducer, an electronic mechanical brake system and a vehicle. By at least partially embedding the planetary gear set of the electronic mechanical brake device into the central hole of the stator or rotor, the axial size of the electronic mechanical brake device is reduced and miniaturization is achieved.
  • the present application specifically includes the following technical solutions:
  • the present application provides an electronic mechanical brake device, which includes a housing, a brake motor, a coaxial reducer and a brake caliper, wherein the brake motor is used to drive the brake caliper to drive the friction plate through the coaxial reducer, wherein:
  • the housing is used to accommodate the stator, rotor and planetary gear set of the coaxial reducer of the brake motor, and the rotor is used to drive and connect the planetary gear set;
  • the stator, the rotor and the output shaft are coaxially arranged, and the planetary gear set is at least partially embedded in the center hole of the stator or the rotor.
  • the electronic mechanical brake device of the present application drives the coaxial reducer through the brake motor to drive the brake caliper to achieve braking.
  • the planetary gear set of the coaxial reducer is arranged adjacent to the brake caliper.
  • the stator and rotor of the brake motor are sleeved on the outside of the planetary gear set.
  • the electronic mechanical brake device of the present application embeds at least part of the planetary gear set in the center hole of the stator or rotor, compressing the size of the electronic mechanical brake device along the axial direction of the brake motor.
  • the overall volume of the electronic mechanical brake device is compressed to achieve miniaturization.
  • the brake motor includes a connecting ring, and the connecting ring, the planetary gear set and the brake caliper are arranged in sequence along the axial direction of the brake motor.
  • the outer ring of the connecting ring is coaxially fixed with the rotor, and the inner ring of the connecting ring is used to coaxially drive the sun gear of the planetary gear set.
  • the connecting ring is arranged on the side of the planetary gear set away from the brake caliper, and the connecting ring is respectively connected to the rotor and the sun gear of the planetary gear set along the radial direction of the brake motor, so that the brake motor can transmit power to the planetary gear set through the connecting ring.
  • the power of the planetary gear set is input from the side away from the brake caliper, which is also conducive to the power output of the planetary gear set toward the brake caliper.
  • the input shaft of the coaxial reducer is used to drive and connect the inner ring of the connecting ring and the sun gear.
  • the housing includes a support cylinder, which is coaxially arranged with the stator, the rotor and the planetary gear set.
  • the inner circumference of the support cylinder is used to fix the ring gear of the planetary gear set, and the ring gear is used to support multiple planetary gears of the planetary gear set.
  • the housing includes a support tube extending axially along the brake motor, which extends into the gap between the rotor of the brake motor and the planetary gear set, and is used to at least fix the ring gear of the planetary gear set to ensure reliable transmission between the planetary gear and the sun gear of the planetary gear set.
  • the inner circumference of the housing is used to fix the outer circumference of the stator, and the central hole of the stator is used to accommodate the rotor; or,
  • the outer circumference of the support cylinder is used to fix the inner circumference of the stator, and the central hole of the rotor is used to accommodate the stator.
  • the brake motor can be an inner rotor motor, and the stator of the brake motor is fixed to the inner circumference of the shell; the brake motor can also be an outer rotor motor, and the rotor of the brake motor is fixed to the outer circumference of the support tube.
  • the planetary gear set includes at least two stages of planetary gear trains, which are arranged at intervals along the axial direction of the brake motor.
  • the inner circumference of the support cylinder is used to fix at least two gear rings, and the at least two gear rings belong to different stages of the planetary gear trains.
  • a multi-stage planetary gear train is provided in the planetary gear set, so that the coaxial reducer can achieve a larger reduction ratio.
  • Each gear ring in the multi-stage planetary gear train can be fixed to the inner circumference of the support cylinder at intervals.
  • the rotor of the brake motor includes a rotor support and a plurality of magnetic sheets.
  • the rotor support is cylindrical, and the plurality of magnetic sheets are evenly surrounded and fixed to the circumferential surface of the rotor support facing the stator of the brake motor along the circumference of the rotor support.
  • the rotor of the brake motor adopts a structure in which a magnetic sheet is attached to the surface of the rotor bracket, which can control the radial size of the rotor and facilitate the embedding of the planetary gear set in the center hole of the rotor or stator.
  • the electronic mechanical brake device includes a circuit board, the circuit board is used to fix a drive circuit, and the drive circuit is used to drive a brake motor, wherein:
  • the circuit board, the planetary gear set of the coaxial reducer and the brake caliper are arranged in sequence, and the circuit board and the brake caliper are located on opposite sides of the planetary gear set.
  • an integrated circuit board can also be integrated in the electronic mechanical brake device, and the circuit board is arranged on the side of the planetary gear set away from the caliper.
  • the distance between the circuit board and the brake motor is relatively close, which is conducive to the arrangement of the circuits in the electronic mechanical brake device.
  • the plane direction of the circuit board is perpendicular to the axial direction of the brake motor.
  • the electronic mechanical brake device includes a position sensor, which is used to detect the rotation angle of the brake motor.
  • the position sensor includes a stator and a rotor, wherein:
  • the circuit board is used to fix the stator of the position sensor
  • the input shaft of the coaxial reducer is used to coaxially drive the rotor of the position sensor.
  • the electronic mechanical brake device detects the rotation angle of the brake motor through a position sensor, and then controls the thrust of the friction plate driven by the electronic mechanical brake device to achieve control of the vehicle's braking force.
  • the stator of the position sensor is provided with an inner hole, the axis of the inner hole of the stator of the position sensor coincides with the axis of the brake motor, the input shaft of the coaxial reducer extends toward the circuit board, and the inner hole of the stator of the position sensor is used to at least partially accommodate the rotor of the position sensor.
  • an extension section is provided on one side of the input shaft of the coaxial reducer to fix the rotor of the position sensor, so as to simplify the internal structure of the electronic mechanical brake device and make the internal space of the electronic mechanical brake device more compact.
  • the electronic mechanical brake device includes a locking mechanism, which is used to lock or release the input shaft of the coaxial reducer, wherein:
  • the locking mechanism is coaxially arranged with the input shaft, and the locking mechanism is used to lock or release the outer peripheral surface of the input shaft of the coaxial reducer; or,
  • the locking mechanism is arranged along the axial direction of the brake motor at a side of the input shaft away from the brake caliper, and the locking mechanism is used to lock or release the end of the input shaft.
  • the cooperation between the locking mechanism and the input shaft can lock or release the transmission function of the coaxial reducer.
  • the coaxial reducer in the transmission state can be used to realize the braking function of the electronic mechanical brake device; the coaxial reducer in the locking state can be used to realize the parking function of the electronic mechanical brake device.
  • the locking mechanism includes a sleeve, an electromagnetic coil and an axial displacement member
  • the sleeve is used to fix the outer circumference of the input shaft
  • the electromagnetic coil is sleeved outside the sleeve
  • the circuit board is used to fix the control circuit of the electromagnetic coil
  • the control circuit is used to control the conduction or disconnection of the electromagnetic coil
  • the electromagnetic coil is used to drive the axial displacement member to slide toward or away from the sleeve to lock or release the input shaft.
  • the locking mechanism is coaxially sleeved with the input shaft, and the locking mechanism controls the transmission function of the planetary gear set via a sleeve fixedly connected to the input shaft.
  • the locking mechanism includes a clutch and a locking motor
  • the circuit board is used to fix the control circuit of the locking motor
  • the control circuit of the locking motor is used to output AC power to drive the locking motor
  • the locking motor is used to control the clutch to lock or release the end of the input shaft.
  • the locking mechanism is fixed to the housing or the circuit board and is disposed corresponding to the end of the input shaft.
  • the locking mechanism controls the transmission function of the planetary gear set by locking or releasing the end of the input shaft.
  • the brake caliper includes a lead screw, a sleeve and a caliper.
  • the lead screw is coaxially driven with the output shaft of the coaxial reducer.
  • the sleeve is sleeved on the outside of the lead screw.
  • the caliper is located on the side of the sleeve away from the brake motor along the axial direction of the output shaft.
  • the lead screw rotates with the output shaft to drive the sleeve to slide axially along the output shaft.
  • the sleeve is used to drive the caliper to slide and drive the friction plate.
  • the screw and the threaded sleeve cooperate to convert the rotational motion output by the output shaft of the coaxial reducer into linear motion, and the threaded sleeve pushes the caliper and drives the friction plate to achieve braking.
  • the present application provides an electronic mechanical braking system, comprising at least one friction plate and an electronic mechanical braking device provided by any of the above-mentioned implementations, the electronic mechanical braking device being used to drive at least one friction plate to move axially along a brake motor to brake a wheel.
  • the present application provides a vehicle comprising wheels and the electronic mechanical braking system provided in the second aspect, wherein the axis of the brake motor in the electronic mechanical braking system is parallel to the axis of the wheel, and the friction plate in the electronic mechanical braking system is used to move toward the brake disc of the wheel to brake the vehicle.
  • the electronic mechanical braking system provided in the second aspect of the present application and the vehicle provided in the third aspect adopt the above-mentioned electronic mechanical braking device, so that the volume is controlled and can be adapted to the wheel side space while achieving reliable braking.
  • FIG1 is a schematic diagram of the appearance structure of a vehicle at the wheel provided in an embodiment of the present application.
  • FIG2 is a schematic diagram of a cross-sectional structure of a vehicle at a wheel provided in an embodiment of the present application
  • FIG3 is a schematic cross-sectional view of an electronic mechanical braking device provided in an embodiment of the present application.
  • FIG4 is a schematic cross-sectional view of a brake caliper in an electronic mechanical brake device provided in an embodiment of the present application
  • FIG5 is a schematic diagram of a cross-sectional structure inside a housing of an electronic mechanical brake device provided in an embodiment of the present application;
  • FIG6 is a schematic diagram of the appearance structure of a housing in an electronic mechanical braking device provided in an embodiment of the present application.
  • FIG7 is a schematic structural diagram of a shell and its internal components in an electronic mechanical brake device provided in an embodiment of the present application;
  • FIG8 is a simplified structural diagram of a housing and its internal components in an electronic mechanical brake device provided in an embodiment of the present application;
  • FIG9 is a schematic cross-sectional structure diagram of a brake motor in an electronic mechanical brake device provided in an embodiment of the present application.
  • FIG10 is a schematic diagram of the exploded structure of a brake motor in an electronic mechanical brake device provided in an embodiment of the present application;
  • FIG11 is a schematic diagram of the exploded structure of a rotor of a brake motor in an electronic mechanical brake device provided in an embodiment of the present application;
  • FIG12 is a schematic cross-sectional structure diagram of the cooperation between a support cylinder and a planetary gear in an electronic mechanical brake device provided in an embodiment of the present application;
  • FIG13 is a schematic diagram of the exploded structure of a support cylinder and a planetary gear in an electronic mechanical brake device provided in an embodiment of the present application;
  • FIG14 is a simplified structural diagram of another embodiment of a housing and internal components of an electronic mechanical brake device provided in an embodiment of the present application;
  • FIG15 is a simplified structural diagram of another embodiment of a housing and internal components of an electronic mechanical brake device provided in an embodiment of the present application;
  • FIG16 is a simplified structural diagram of another embodiment of a housing and internal components of an electronic mechanical brake device provided in an embodiment of the present application;
  • FIG17 is a schematic diagram of the exploded structure of a locking mechanism in an electronic mechanical brake device provided in an embodiment of the present application.
  • FIG18 is a schematic structural diagram of another embodiment of a housing and internal components of an electronic mechanical brake device provided in an embodiment of the present application;
  • FIG19 is a simplified structural diagram of another embodiment of a housing and internal components of an electronic mechanical brake device provided in an embodiment of the present application;
  • FIG. 20 is a schematic cross-sectional view of another embodiment of a locking mechanism in an electronic mechanical brake device provided in an embodiment of the present application.
  • the present application provides an electronic mechanical brake device, which includes a housing, a brake motor, a coaxial reducer and a brake caliper.
  • the brake motor is used to drive the brake caliper to drive the friction plate through the coaxial reducer, wherein: the housing is used to accommodate the stator, rotor and planetary gear set of the brake motor and the coaxial reducer, and the rotor is used to drive and connect the planetary gear set; the stator, rotor and output shaft are arranged coaxially, and the planetary gear set is at least partially embedded in the center hole of the stator or rotor.
  • the electronic mechanical brake device of the present application embeds the planetary gear set at least partially in the center hole of the stator or rotor, compressing the size of the electronic mechanical brake device along the axial direction of the brake motor, and compressing the overall volume of the electronic mechanical brake device while ensuring reliable braking of the electronic mechanical brake device, thereby achieving miniaturization.
  • the present application provides an electronic mechanical braking system, comprising at least one friction plate and the above-mentioned electronic mechanical braking device, the electronic mechanical braking device is used to drive at least one friction plate to move along the axial direction of the brake motor to brake the wheel.
  • the electronic mechanical braking system of the present application is small in size and can be adapted to the wheel side space.
  • the present application provides a vehicle, including wheels and the above-mentioned electronic mechanical braking system, wherein the axial direction of the brake motor in the electronic mechanical braking system is parallel to the axial direction of the wheel, and the friction plate in the electronic mechanical braking system is used to move toward the brake disc of the wheel to brake the vehicle.
  • the electronic mechanical braking system of the vehicle of the present application is relatively small in size, which is conducive to the internal space layout of the vehicle.
  • the vehicle of the present application comprises wheels and a frame, wherein the wheels are rotatably connected to the frame to drive the vehicle.
  • the electronic mechanical braking system of the present application is fixed to the frame and located at the wheel, and the electronic mechanical braking system brakes the wheel through the action of an internal mechanism.
  • FIG1 a schematic diagram of the appearance structure of a vehicle wheel provided in an embodiment of the present application.
  • the wheel 1001 is provided with a brake disc 1002, and the brake disc 1002 is coaxially fixed with the wheel hub of the wheel 1001.
  • the wheel 1001 rotates relative to the frame, and the brake disc 1002 rotates relative to the frame synchronously with the wheel 1001.
  • the outer diameter of the brake disc 1002 is The brake disc 1002 is smaller than the inner diameter of the inner ring of the wheel, and is accommodated in the inner ring of the wheel 1001.
  • the electronic mechanical braking system 200 provided in the present application is fixed to a vehicle frame (not shown in the figure).
  • the electronic mechanical braking system 200 at least partially extends into the inner ring of the wheel 1001 and cooperates with the brake disc 1002 to brake the wheel 1001 .
  • FIG. 2 Please refer to FIG. 2 for a schematic cross-sectional structure of a vehicle wheel provided in an embodiment of the present application.
  • the electronic mechanical brake system 200 of the present application includes a caliper frame 201, a friction plate 202, and an electronic mechanical brake device 100 provided in the present application.
  • the caliper frame 201 is used to be fixedly connected to the vehicle frame, and the electronic mechanical brake device 100 is slidably connected to the caliper frame 201.
  • the electronic mechanical brake device 100 is slidably connected to the caliper frame 201 by means of a through hole and a slide bar. That is, the electronic mechanical brake device 100 is provided with one of the through hole and the slide bar, and the caliper frame 201 is provided with the other of the through hole and the slide bar.
  • the relative sliding between the electronic mechanical brake device 100 and the caliper frame 201 is achieved by the axial sliding of the slide bar in the through hole.
  • the sliding direction of the electronic mechanical brake device 100 relative to the caliper frame 201 is parallel to the axial direction of the brake disc 1002.
  • the axial direction of the through hole and the axis of the slide bar are both parallel to the axial direction of the brake disc 1002.
  • the electronic mechanical brake device 100 can push the two friction plates 202 to slide toward each other and contact the two opposite outer surfaces of the brake disc 1002 through the action of the internal mechanism and the sliding relative to the caliper frame 201, so as to generate friction to brake the brake disc 1002.
  • FIG. 3 shows a schematic cross-sectional structure of an electronic mechanical braking device 100 provided in an embodiment of the present application.
  • the electronic mechanical brake device 100 of the present application includes a brake caliper 10, a housing 20, a brake motor 30 and a coaxial reducer 40.
  • the brake caliper 10 is used to slidably connect the caliper frame 201 and slide along the axial direction of the brake disc 1002 relative to the caliper frame 201.
  • the housing 20 is fixedly connected to the brake caliper 10, and the inner cavity of the housing 20 is used to accommodate the brake motor 30 and the coaxial reducer 40.
  • the coaxial reducer 40 is used for transmission connection between the brake caliper 10 and the brake motor 30, and the brake motor 30 is used to drive the coaxial reducer 40 to rotate to drive the brake caliper 10 to push the friction plate 202.
  • FIG. 4 Please refer to FIG. 4 for a schematic cross-sectional structure diagram of a brake caliper 10 in an electronic mechanical brake device 100 provided in an embodiment of the present application.
  • the brake caliper 10 includes a caliper 11 and a feeding mechanism.
  • the caliper 11 is generally U-shaped, and includes a main body 111, a pushing part 112, and a connecting part 113.
  • the main body 111 and the pushing part 112 are arranged on both sides of the brake disc 1002 along the axial direction of the brake disc 1002, and the main body 111 and the pushing part 112 are also arranged on both sides of two friction plates 202 along the axial direction of the brake disc 1002.
  • the pushing part 112, one friction plate 202, the brake disc 1002, the other friction plate 202, and the main body 111 are arranged in sequence along the axial direction of the brake disc 1002.
  • the connecting part 113 is located on the outer side of the brake disc 1002 along the radial direction of the brake disc 1002, and the connecting part 113 is used to fix the main body 111 and the pushing part 112.
  • the friction plate 202 located on the side of the brake disc 1002 close to the main body 111 is slidably connected to the main body 111. In one embodiment, the friction plate 202 located on the side of the brake disc 1002 close to the pusher 112 is fixedly connected to the pusher 112.
  • the main body 111 is also used for sliding connection with the caliper frame 201.
  • the feeding mechanism is accommodated in the inner cavity of the main body 111.
  • the shell 20 is fixed to the side of the main body 111 away from the pushing portion 112.
  • the feeding mechanism is connected to the coaxial reducer 40 in a transmission manner.
  • the main body 111 and the shell 20 are respectively provided with avoidance holes, and the avoidance holes are used to avoid the transmission shaft between the feeding mechanism and the coaxial reducer 40.
  • the transmission shaft can be an integral structure with the input shaft of the feeding mechanism, that is, the input shaft of the feeding mechanism can pass through the two avoidance holes and extend into the shell 20 to be transmission-connected to the coaxial reducer 40; in other embodiments, the transmission shaft can be an integral structure with the output shaft of the coaxial reducer 40, that is, the output shaft of the coaxial reducer 40 can pass through the two avoidance holes and extend into the inner cavity of the main body 111 to be transmission-connected to the feeding mechanism.
  • the feeding mechanism includes a lead screw 12 and a screw sleeve 13.
  • the screw sleeve 13 is coaxially sleeved on the outer side of the lead screw 12, and the lead screw 12 is used for coaxial transmission with the output shaft of the coaxial reducer 40.
  • the output shaft of the coaxial reducer 40 drives the lead screw 12 to rotate to drive the screw sleeve 13 to slide.
  • the end of the lead screw 12 facing the coaxial reducer 40 can be regarded as the input shaft of the feeding mechanism.
  • the outer circumference of the lead screw 12 and the inner circumference of the screw sleeve 13 are provided with mutually matching threads.
  • the lead screw 12 can drive the screw sleeve 13 to slide along the axis of the lead screw 12.
  • the screw sleeve 13 On the side of the screw sleeve 13 away from the coaxial reducer 40, the screw sleeve 13, a friction plate 202, and the brake disc 1002 are arranged in sequence along the axis of the lead screw 12.
  • the lead screw 12 can drive the friction plate 202 to move relative to the brake disc 1002 by driving the screw sleeve 13 to slide along the axis of the lead screw 12.
  • the coaxial reducer 40 drives the screw 12 to rotate forward along its own axis, the screw sleeve 13 slides along the axis of the screw 12 toward the brake disc 1002, and drives the friction plate 202 to contact the brake disc 1002 to achieve braking; when the brake motor 30 flips, the coaxial reducer 40 drives the screw 12 to reverse along its own axis, the screw sleeve 13 slides along the axis of the screw 12 in the direction away from the brake disc 1002, and the friction plate 202 and the brake disc 1002 are released.
  • a separation spring 203 is further provided between the two friction plates 202, and the opposite ends of the separation spring 203 respectively abut against the two friction plates 202.
  • the separation spring 203 is used to provide an elastic force for the two friction plates 202 to move away from each other along the axial direction of the screw 12, so as to ensure that after the screw sleeve 13 slides away from the brake disc 1002, the two friction plates 202 respectively release contact with the brake disc 1002.
  • a ball bearing (not shown) may be disposed between the lead screw 12 and the screw sleeve 13. There are multiple balls, and the balls are supported between the outer peripheral surface threads of the lead screw 12 and the inner peripheral surface threads of the screw sleeve 13. The balls are used to reduce the friction between the lead screw 12 and the screw sleeve 13, thereby improving the transmission efficiency of the electronic mechanical brake device 100.
  • FIG. 5 Please refer to FIG. 5 for a schematic diagram of the cross-sectional structure inside the housing 20 of the electronic mechanical brake device 100 provided in an embodiment of the present application.
  • the brake motor 30 includes a stator 31 and a rotor 32.
  • the stator 31 and the rotor 32 are coaxially arranged along the radial direction of the brake motor 30.
  • the stator 31 is used to drive the rotor 32 to rotate to output power.
  • the brake motor 30 may further include a motor shaft, which is coaxially fixed with the rotor 32, and the motor shaft is transmission-connected with the coaxial reducer 40, and the brake motor 30 transmits power to the coaxial reducer 40 through the motor shaft.
  • the brake motor 30 is an inner rotor motor, the stator 31 is coaxially sleeved on the outer side of the rotor 32, and the rotor 32 is located in the center hole of the stator 31.
  • the housing 20 is used to fix the stator 31, and the stator 31 drives the rotor 32 to rotate in the center hole of the stator 31;
  • the brake motor 30 can be an outer rotor motor, the rotor 32 is coaxially sleeved on the outer side of the stator 31, and the stator 31 is located in the center hole of the rotor 32.
  • a support cylinder structure is provided in the housing 20, and the support cylinder is used to fix the stator 31, and the stator 31 drives the rotor 32 to rotate on the outer side of the stator 31.
  • the coaxial reducer 40 includes an input shaft 41, an output shaft 42, and a gear set.
  • the input shaft 41 and the output shaft 42 are connected by the gear set.
  • the input shaft 41 is used for connecting the brake motor 30, and the output shaft 42 is used for connecting the brake caliper 10.
  • the input shaft 41 of the coaxial reducer 40 is used for coaxially driving the rotor 32 of the brake motor 30.
  • the input shaft 41 is used for coaxially driving the motor shaft of the brake motor 30.
  • the output shaft 42 of the coaxial reducer 40 is used for coaxially driving the screw 12 of the feed mechanism.
  • the gear set is used to adjust the rotation speed.
  • the axis of the input shaft 41 in the coaxial reducer 40 coincides with the axis of the output shaft 42.
  • the gear set can be implemented by a planetary gear set 43.
  • the structure of the planetary gear set 43 is relatively compact and can provide a large reduction ratio, which is conducive to the miniaturization of the electronic mechanical brake device 100 of the present application.
  • the input axis and the output axis of the planetary gear set 43 coincide, which is suitable for use as a gear set transmission in the coaxial reducer 40 of the present application.
  • the planet carrier of the planetary gear set 43 is coaxially driven with the lead screw 12, and the planet carrier of the planetary gear set 43 also serves as the output shaft 42 of the coaxial reducer 40.
  • the output shaft 42 of the coaxial reducer 40 and the planet carrier of the planetary gear set 43 are an integrated structure.
  • the planet carrier and the output shaft 42 of the integrated structure can simplify the structure of the coaxial reducer 40 and reduce the volume.
  • the coaxial reducer 40 can also be provided with a separate output shaft 42 structure, and the output shaft 42 is used to drive and connect the planet carrier of the planetary gear set 43 and the lead screw 12.
  • the stator 31 of the brake motor 30 drives the rotor 32 to rotate forward.
  • the rotor 32 drives the input shaft 41 of the coaxial reducer 40 connected to the transmission to rotate forward synchronously.
  • the input shaft 41 drives the output shaft 42 to rotate forward through the gear set.
  • the output shaft 42 drives the lead screw 12 in the feed mechanism connected to the transmission to rotate forward synchronously.
  • the feed mechanism is used to convert the rotation of the lead screw 12 into the sliding action of the screw sleeve 13, that is, the lead screw 12 drives the screw sleeve 13 to slide along the axis of the lead screw 12.
  • the sliding direction of the screw sleeve 13 is toward the brake disc 1002, and the screw sleeve 13 pushes a friction plate 202 to move toward the brake disc 1002, and makes the friction plate 202 contact with the brake disc 1002 to generate friction.
  • the stator 31 of the brake motor 30 continues to drive the rotor 32 to rotate forward, and the screw sleeve 13 slides along the axial direction of the lead screw 12 through the same power transmission path mentioned above.
  • the screw sleeve 13 Because the position of the brake disc 1002 is fixed, the screw sleeve 13, the friction plate 202 and the brake disc 1002 abut in sequence, and the screw sleeve 13 receives the reverse abutting thrust of the brake disc 1002, and the axial sliding action of the screw sleeve 13 relative to the lead screw 12 is converted into the sliding action of the screw sleeve 13 pushing the caliper 11 in the opposite direction relative to the caliper frame 201.
  • the axial size of the feed mechanism is further increased under the action of the brake motor 30, and the caliper 11 is pushed in the opposite direction toward the housing 20 to slide relative to the caliper frame 201.
  • the housing 20 slides synchronously with the caliper 11 in the direction away from the brake disc 1002.
  • the sliding of the caliper 11 toward the housing 20 can drive the push portion 112 to slide synchronously toward the housing 20. Because the push portion 112 is located on the side of the brake disc 1002 away from the housing 20, the sliding direction of the push portion 112 is toward the brake disc 1002. That is, after the friction plate 202 close to the screw sleeve 13 contacts and abuts against the brake disc 1002, the feeding mechanism further drives the push portion 112 to slide toward the brake disc 1002. The push portion 112 can drive another friction plate 202 located on the same side to slide synchronously toward the brake disc 1002, and make the other friction plate 202 contact with the brake disc 1002 to generate friction.
  • the friction plates 202 located on both sides of the brake disc 1002 can be driven to slide toward each other and contact the two opposite outer surfaces of the brake disc 1002 respectively, thereby generating friction to brake the brake disc 1002 and achieve vehicle braking.
  • the stator of the brake motor 30 drives the rotor 32 to reverse.
  • the rotor 32 sequentially drives the input shaft 41, the output shaft 42 of the coaxial reducer 40, and the lead screw 12 of the feed mechanism to reverse synchronously.
  • the reverse rotation of the lead screw 12 can drive the screw sleeve 13 to slide in the direction away from the brake disc 1002, thereby increasing the distance between the two friction plates 202.
  • the separation spring 203 Under the action of the separation spring 203, the two friction plates 202 are respectively separated from the brake disc 1002.
  • the wheel 1001 can continue to rotate and drive the vehicle.
  • a return spring (not shown) may also be provided between the caliper 11 and the caliper frame 201.
  • the return spring is used to drive the caliper 11 to slide relative to the caliper frame 201 in a direction away from the housing 20, so as to drive the pushing portion 112 to slide in a direction away from the brake disc 1002, thereby ensuring that the two friction plates 202 are reliably separated from the brake disc 1002.
  • the internal mechanism of the electronic mechanical brake device 100 can drive the friction plates 202 located on both sides of the brake disc 1002 to slide opposite to each other and release contact with the two opposite outer surfaces of the brake disc 1002, so that the wheel 1001 can continue to rotate and drive the vehicle to move.
  • the electronic mechanical brake device 100 includes a circuit board 50.
  • the circuit board 50 is used to fix the drive circuit, and the drive circuit is used to drive the brake motor 30.
  • the circuit board 50 can be accommodated in the inner cavity of the housing 20 together with the brake motor 30, which can shorten the signal transmission distance from the drive circuit to the brake motor 30 and simplify the internal circuit arrangement of the electronic mechanical brake device 100.
  • the housing 20 can form a reliable sealing protection effect for the circuit board 50.
  • the electronic mechanical brake device 100 includes a position sensor.
  • the position sensor is used to detect the rotation angle of the brake motor 30, and then adjust the braking force of the electronic mechanical brake device 100.
  • the position sensor includes a stator and a rotor.
  • the stator of the position sensor can be fixed to the housing 20, and the rotor of the position sensor can be coaxially driven with the motor shaft of the brake motor 30 or the transmission shaft of the coaxial reducer 40.
  • the stator of the position sensor can be directly fixed to the housing 20, or it can be fixed to the circuit board 50 and indirectly fixed to the housing 20 through the circuit board 50; the rotor of the position sensor can be coaxially driven with the motor shaft of the brake motor 30, the input shaft 41 and the output shaft 42 of the coaxial reducer 40.
  • the rotation angle of the motor shaft of the brake motor 30, the input shaft 41 and the output shaft 42 of the coaxial reducer 40 in the inner cavity of the housing 20 can be detected.
  • the position sensor can also be connected to the drive circuit on the circuit board 50 for communication.
  • the drive circuit receives the angle signal detected by the position sensor, calculates the rotation angle of the rotor 32 in the brake motor 30, and then adjusts the braking force of the electronic mechanical brake device 100, that is, adjusts the braking force of the vehicle.
  • the electronic mechanical brake device 100 includes a locking mechanism.
  • the locking mechanism is used to lock or release the motor shaft of the brake motor 30, or the locking mechanism is used to lock or release the drive shaft of the coaxial reducer 40, and the electronic mechanical brake device 100 of the present application also has a parking function.
  • part of the locking mechanism is fixed to the housing 20, and the other part acts on the motor shaft of the brake motor 30 or the drive shaft of the coaxial reducer 40.
  • the motor shaft of the brake motor 30 or the drive shaft of the coaxial reducer 40 can be locked by the locking mechanism to keep the friction plate 202 in contact with the brake disc 1002, and the brake disc 1002 no longer rotates, and the vehicle enters the parking state.
  • Figure 6 is a schematic diagram of the appearance structure of the housing 20 in the electronic mechanical brake device 100 of the present application
  • Figure 7 is a schematic diagram of the structure of the housing 20 after decomposition and its internal components
  • Figure 8 is a schematic diagram of the structure of the housing 20 and its internal components.
  • the housing 20 is used to accommodate the stator 31, the rotor 32 of the brake motor 30, and the planetary gear set 43 of the coaxial reducer 40.
  • the housing 20 is also used to accommodate the circuit board 50 and the locking mechanism 60.
  • the housing 20 includes a partition 21, and the stator 31, the rotor 32 of the brake motor 30, and the planetary gear set 43 of the coaxial reducer 40 are located on one side of the partition 21, and the circuit board 50 is located on the other side of the partition 21.
  • the partition 21 is separated between the circuit board 50 and the brake motor 30 and the planetary gear set 43, and a sealing protection can be formed for the partition 21.
  • the locking mechanism 60 and the circuit board 50 are located on the same side of the partition 21. In other embodiments, the locking mechanism 60 may also be located on the side of the partition 21 away from the circuit board 50. The position of the locking mechanism 60 may be matched and set based on its specific structure and spatial arrangement.
  • the brake motor 30 is an inner rotor motor, that is, the stator 31 is coaxially sleeved on the outer side of the rotor 32, and the housing 20 is used to fix the stator 31.
  • the rotor 32 includes a central hole, and the planetary gear set 43 of the electronic mechanical brake device 100 of the present application is at least partially embedded in the central hole of the rotor 32.
  • the planetary gear set 43 is embedded in the central hole of the rotor 32 as a whole.
  • stator 31 and the rotor 32 of the brake motor 30 of the electronic mechanical brake device 100 of the present application are sleeved on the outside of the planetary gear set 43 along the radial direction of the brake motor 30, forming a structure in which the coaxial reducer 40 is partially embedded in the brake motor 30.
  • This structure compresses the size of the electronic mechanical brake device 100 along the axial direction of the brake motor 30, and compresses the overall volume of the electronic mechanical brake device 100 while ensuring reliable braking of the electronic mechanical brake device 100, thereby achieving miniaturization.
  • the brake motor is an outer rotor motor, that is, the rotor 32 is coaxially sleeved on the outside of the stator 31, the planetary gear set 43 can be at least partially embedded in the center hole of the stator 31, and the structure in which the coaxial reducer 40 is partially embedded in the brake motor 30 can also be formed.
  • the overall volume of the electronic mechanical brake device 100 is compressed to achieve miniaturization.
  • Figure 9 is a schematic cross-sectional view of the brake motor 30 in the electronic mechanical brake device 100 of the present application;
  • Figure 10 is a schematic exploded view of the brake motor 30;
  • Figure 11 is a schematic exploded view of the rotor 32 in the brake motor 30.
  • the brake motor 30 of the electronic mechanical brake device 100 of the present application includes a connecting ring 33, which is used for transmission connection.
  • the connecting ring 33 is connected to the rotor 32 of the motor 30 and the input shaft 41 of the coaxial reducer 40.
  • the outer ring of the connecting ring 33 is coaxially fixed with the rotor 32.
  • the connecting ring 33 is also an integral structure with the rotor 32.
  • the inner ring of the connecting ring 33 is used to coaxially drive the sun gear of the planetary gear set 43.
  • the inner ring of the connecting ring 33 is fixedly connected to the input shaft 41 of the coaxial reducer 40, and the sun gear of the planetary gear set 43 is connected to the input shaft 41.
  • the inner ring of the connecting ring 33 can be directly fixedly connected to the sun gear of the planetary gear set 43.
  • the connecting ring 33 is defined to be transmission-connected with the input shaft 41 of the coaxial reducer 40. Because the input shaft 41 of the coaxial reducer 40 is coaxially transmitted with the motor shaft of the brake motor 30, the input shaft 41 can also be defined as the motor shaft of the brake motor 30. Or it can be described as that the input shaft 41 of the coaxial reducer 40 and the motor shaft of the brake motor 30 are an integral structure. At this time, the connecting ring 33 can also be understood as an inner ring fixed to the motor shaft of the brake motor 30, and the motor shaft of the brake motor 30 is coaxially transmitted with the planetary gear set 43. The division of the input shaft 41 does not affect the realization of the transmission function between the brake motor 30 and the coaxial reducer 40 of the present application.
  • the connecting ring 33, the planetary gear set 43 and the brake caliper 10 are arranged in sequence along the axial direction of the brake motor 30. That is, the connecting ring 33 is arranged on the side of the planetary gear set 43 away from the brake caliper 10. The power of the planetary gear set 43 is input from the side away from the brake caliper 10, which is conducive to the planetary gear set 43 to output power toward the brake caliper 10 side.
  • the rotor 32 of the brake motor 30 includes a rotor support 321 and a plurality of magnetic sheets 322.
  • the rotor support 321 is cylindrical, and the outer ring of the connecting ring 33 is fixed to the rotor support 321.
  • the plurality of magnetic sheets 322 are evenly surrounded and fixed to the circumferential surface of the rotor support 321 facing the stator of the brake motor 30.
  • the rotor support 321 includes two parts, one of which is the main body of the rotor support 321, and the other part is sleeved on the main body of the rotor support 321 and is provided with a plurality of hollow areas.
  • Each magnetic sheet 322 is embedded in each hollow area to be fixed to the outer circumference of the rotor support 321.
  • the magnetic sheet 322 can also be directly attached to the outer circumference of the rotor support 321 in a surface-mounted manner.
  • the winding in the form of the magnetic sheet 322 is easy to manufacture, and by controlling the thickness of the magnetic sheet 322 and the wall thickness of the rotor bracket 321, the radial dimension of the rotor 32 can be reduced, and the radial dimension of the brake motor 30 can be further compressed, thereby realizing the miniaturization of the electronic mechanical brake device 100.
  • the radial dimension of the rotor 32 is reduced, and it is also convenient to embed the planetary gear set 43 in the center hole of the rotor 32 or the stator 31.
  • the brake motor 30 is an inner rotor motor.
  • the outer circumference of the rotor bracket 321 faces the stator 31, and the plurality of magnetic sheets 322 are attached to the outer circumference of the rotor bracket 321.
  • the brake motor 30 is an outer rotor motor
  • the inner circumference of the rotor bracket 321 faces the stator 31, and the plurality of magnetic sheets 322 need to be attached to the inner circumference of the rotor bracket 321 to ensure reliable operation of the brake motor 30.
  • the housing 20 includes a support cylinder 22.
  • the support cylinder 22 is cylindrical, located in the inner cavity of the housing 20 and fixedly connected to the main body of the housing 20.
  • the axis of the support cylinder 22 coincides with the axis of the brake motor 30.
  • the support cylinder 22 is located between the planetary gear set 43 and the rotor 32 of the brake motor 30, and the support cylinder 22 is used to accommodate the planetary gear set 43.
  • Figure 12 is a schematic diagram of the cross-sectional structure of the support cylinder 22 and the planetary gear set 43
  • Figure 13 is a schematic diagram of the exploded structure of the support cylinder 22 and the planetary gear set 43.
  • the planetary gear set 43 includes a two-stage planetary gear train.
  • the two-stage planetary gear trains are axially spaced and arranged along the input shaft 41 of the coaxial reducer 40, and the two-stage planetary gear trains are transmission-connected to increase the reduction ratio of the planetary gear set 43.
  • the planetary gear set 43 can also be provided with only one-stage planetary gear train, or the planetary gear set 43 can be provided with three or more stages of planetary gear trains, which can be arbitrarily set based on the reduction ratio requirements of the coaxial reducer 40.
  • Each stage of the planetary gear train includes a sun gear 431, planetary gears 432, a planet carrier 433 and a ring gear 434.
  • the sun gear 431 is used to coaxially drive the input shaft 41 of the coaxial reducer 40
  • the number of planetary gears 432 is multiple
  • the multiple planetary gears 432 are meshed with the outer periphery of the sun gear 431
  • one side of the planet carrier 433 is used to rotatably connect the various planetary gears 432
  • the other side of the planet carrier 433 is used to rotatably connect the sun gear 431 of the next stage of the planetary gear train.
  • the sun gear 431 of the next-stage planetary gear train is used to drive the planet carrier 433 of the next-stage planetary gear train to rotate through the planet gear 432 of the next-stage planetary gear train, and the planet carrier 433 of the next-stage planetary gear train is used to coaxially drive the screw 12 of the brake caliper 10.
  • the sun gear 431 in the planetary gear train near the input shaft 41 is also an integrated structure with the end of the input shaft 41, which can compress the overall volume of the planetary gear set 43; in the planetary gear train near the output shaft 42, the sun gear 431 is also an integrated structure with the planetary carrier 433 in the planetary gear train near the input shaft 41, which can also compress the overall volume of the planetary gear set 43.
  • the inner circumferential surface of the support cylinder 22 is used to fix the ring gear 434 of the planetary gear set 43, and the ring gear 434 is used to support a plurality of planetary gears 432.
  • the support cylinder 22 is used to fix two ring gears 434, and the two ring gears 434 belong to different stages of the planetary gear train. It can be understood that the two ring gears 434 are fixed at intervals along the axial direction of the support cylinder 22.
  • the support cylinder 22 is coaxially arranged with the stator 31, the rotor 32 and the planetary gear set 43. Located between the stator 31 and the planetary gear set 43. It is also described that the support cylinder 22 extends into the gap between the rotor 32 of the brake motor 30 and the planetary gear set 43, and the inner circumferential surface of the support cylinder 22 is used to fix the ring gear 434 of the planetary gear set 43, and the ring gear 434 is used to support the multiple planetary gears 432 of the planetary gear set 43 to ensure that the planetary gear set 43 is reliably transmitted after at least partially embedded in the center hole of the stator 31 of the brake motor 30.
  • the brake motor 30 is an inner rotor motor
  • the inner circumference of the housing 20 is used to fix the outer circumference of the stator 31, and the central hole of the stator 31 is used to accommodate the rotor 32.
  • the rotor 32 can rotate relative to the outer circumference of the support tube 22, and a gap is left between the rotor 32 and the outer circumference of the support tube 22.
  • an inner rotor bearing 91 may be provided between the rotor 32 and the outer circumference of the support tube 22.
  • the inner ring of the inner rotor bearing 91 is fixed to the outer circumference of the support tube 22, and the outer ring of the inner rotor bearing 91 is fixed to the inner circumference of the rotor 32.
  • the inner rotor bearing 91 is used to support the rotor 32 so that the rotor 32 rotates more smoothly relative to the support tube 22.
  • the inner rotor bearing 91 is located on the side of the rotor 32 close to the brake caliper 10.
  • the inner rotor bearing 91 and the connecting ring 33 are respectively located on opposite sides of the rotor 32, and the inner rotor bearing 91 and the connecting ring 33 can respectively support the rotor 32 from both sides of the rotor 32, further improving the rotation stability of the rotor 32, and can improve the transmission efficiency of the electronic mechanical brake device 100.
  • the brake motor 30 is an outer rotor motor
  • the outer circumference of the support cylinder 22 is also used to fix the inner circumference of the stator 31, and the center hole of the rotor 32 is used to accommodate the stator 31.
  • the rotor 32 can rotate relative to the inner circumference of the housing 20, and a gap is left between the rotor 32 and the inner circumference of the housing 20.
  • an outer rotor bearing 92 (as shown in FIG. 16 ) may be provided between the rotor 32 and the inner circumference of the housing 20.
  • the inner ring of the outer rotor bearing 92 is fixed to the outer circumference of the rotor 32, and the outer ring of the outer rotor bearing 92 is fixed to the inner circumference of the housing 20.
  • the outer rotor bearing 92 is used to support the rotor 32 so that the rotor 32 rotates more smoothly relative to the housing 20.
  • the outer rotor bearing 92 is located on the side of the rotor 32 close to the brake caliper 10.
  • the electronic mechanical brake device 100 of the present application may include a circuit board 50.
  • the circuit board 50, the planetary gear set 43 of the coaxial reducer 40 and the brake caliper 10 are arranged in sequence, and the circuit board 50 and the brake caliper 10 are located on opposite sides of the planetary gear set 43.
  • the circuit board 50 is disposed on the side of the planetary gear set 43 away from the brake caliper 10, so as to avoid opening a clearance hole on the circuit board 50 to avoid the output shaft 42 of the coaxial reducer 40.
  • the distance between the circuit board 50 and the brake motor 30 is relatively close, which is conducive to the arrangement of the circuits in the electronic mechanical brake device 100.
  • the plane direction of the circuit board 50 is perpendicular to the axial direction of the brake motor 30, thereby shortening the dimension of the electronic mechanical brake device 100 along the axial direction of the brake motor 30.
  • the position sensor 70 of the electronic mechanical brake device 100 includes a stator 71 and a rotor 72.
  • the circuit board 50 is used to fix the stator 71 of the position sensor 70
  • the input shaft 41 of the coaxial reducer 40 is used to coaxially drive the rotor 72 of the position sensor 70.
  • the end of the input shaft 41 toward the circuit board 50 extends toward the circuit board 50, and the rotor 72 of the position sensor 70 can be fixed to the input shaft 41 and aligned with the stator 71 of the position sensor 70 fixed on the circuit board 50.
  • the rotor 72 of the position sensor 70 rotates with the input shaft 41, and the stator 71 of the position sensor 70 is used to detect the rotation angle of the rotor 72 of the position sensor.
  • the direction in which the stator 71 and the rotor 72 of the position sensor 70 are aligned with each other can be along the axial direction of the brake motor 30 or along the radial direction of the brake motor 30.
  • the rotor 72 of the position sensor 70 can be fixed to the end of the input shaft 41 of the coaxial reducer 40 facing the circuit board 50, and a gap is left between the stator 71 and the rotor 72 of the position sensor 70 along the axial direction of the brake motor 30.
  • the stator 71 of the position sensor 70 is provided with an inner hole, the axis of the inner hole of the stator 71 of the position sensor 70 coincides with the axis of the brake motor 30, and the input shaft 41 of the coaxial reducer 40 extends toward the circuit board 50.
  • the end of the input shaft 41 passes through the circuit board 50, the rotor 72 of the position sensor 70 is fixed to the outer circumferential surface of the input shaft 41, and the inner hole of the stator 71 of the position sensor 70 is used to at least partially accommodate the rotor 72 of the position sensor 70.
  • a gap is left between the stator 71 and the rotor 72 of the position sensor 70 along the radial direction of the brake motor 30.
  • FIG16 also illustrates a method for implementing a locking mechanism 60.
  • the locking mechanism 60 is arranged along the axial direction of the brake motor 30 on the side of the input shaft 41 away from the brake caliper 10, and the locking mechanism 60 is used to lock or release the end of the input shaft 41.
  • the locking mechanism 60 includes a clutch 61 and a locking motor 62.
  • the locking motor 62 is fixed in the inner cavity of the housing 20, and the clutch 61 can lock or release the end of the input shaft 41 under the drive of the locking motor 62.
  • the circuit board 50 can also be used to fix the control circuit of the locking motor 62, and the control circuit of the locking motor 62 is used to output AC power to drive the locking motor 62.
  • the end of the input shaft 41 of the coaxial reducer 40 is provided with an inner hole 411
  • the clutch 61 includes an inner wheel 611 , a movable part 612, spring 613, and axial moving member 614.
  • the inner wheel 611 is embedded in the inner hole 411, and the movable member 612 and spring 613 are both received in the groove of the inner wheel 611.
  • One end of the spring 613 abuts against the movable member 612, and the other end abuts against the inner wall of the groove of the inner wheel 611.
  • the spring 613 is used to push the movable member 612 to move toward the inner wall on the other side of the groove of the inner wheel 611.
  • the axial moving member 614 is driven by the locking motor 62 to slide in the housing 20, and the sliding direction of the axial moving member 614 is parallel to the axial direction of the input shaft 41.
  • the axial moving member 614 is driven to extend into or withdraw from the inner hole 411 of the input shaft 41.
  • the axial moving member 614 When the axial moving member 614 extends into the inner hole 411 of the input shaft 41, the axial moving member 614 abuts against the movable member 612 and drives the movable member 612 to slide toward one side of the spring 613; when the axial moving member 614 withdraws from the inner hole 411 of the input shaft 41, the axial moving member 614 releases the movable member 612, and the movable member 612 slides toward the side away from the spring 613 under the action of the spring 613.
  • the groove bottom of the inner wheel 611 is inclined, and the movable member 612 switches between two positions, and the radial height of the movable member 612 relative to the inner wheel 611 changes accordingly.
  • the movable member 612 When the movable member 612 is at a position with a higher radial height, the movable member 612 can abut against the inner circumference of the inner hole 411 of the input shaft 41, thereby locking the end of the input shaft 41; when the movable member 612 is at a position with a lower radial height, the movable member 612 releases the inner circumference of the inner hole 411 of the input shaft 41, thereby releasing the end of the input shaft 41. Therefore, the locking mechanism 60 can lock or release the end of the input shaft 41 through the control of the clutch 61 by the locking motor 62, thereby realizing the parking function.
  • the electronic mechanical brake device 100 may also be provided with a locking bearing 93, and the locking bearing 93 is used to support the input shaft 41 of the coaxial reducer 40.
  • the locking bearing 93 is provided on the side of the circuit board 50 away from the planetary gear set 43, the inner ring of the locking bearing 93 is fixed to the outer peripheral surface of the input shaft 41, and the outer ring of the locking bearing 93 is fixed to the inner wall of the housing 20. Because the input shaft 41 of the coaxial reducer 40 extends longer in the direction toward the circuit board 50, the locking bearing 93 is provided on the side of the circuit board 50 away from the planetary gear set 43, which can form a better support effect for the input shaft 41.
  • the locking mechanism 60 can be coaxially arranged with the input shaft 41 of the coaxial reducer 40, and the locking mechanism 60 is used to lock or release the outer peripheral surface of the input shaft 41 of the coaxial reducer 40.
  • the locking mechanism 60 includes a sleeve 63, an electromagnetic coil 64 and an axial displacement member 65.
  • the sleeve 63 is used to fix the outer peripheral surface of the input shaft 41, the electromagnetic coil 64 is sleeved outside the sleeve 63, and the electromagnetic coil 64 is fixed to the housing 20.
  • the circuit board 50 is used to fix the control circuit of the electromagnetic coil 64, and the control circuit of the electromagnetic coil 64 is used to control the electromagnetic coil 64 to be turned on or off.
  • the electromagnetic coil 64 is used to drive the axial displacement member 65 to slide toward or away from the sleeve 63 to lock or release the input shaft 41.
  • the axial displacement member 65 and the sleeve 63 are arranged at intervals along the axial direction of the input shaft 41.
  • a locking structure that engages with each other is provided between the axial displacement member 65 and the sleeve 63 along the radial direction of the brake motor 30.
  • the sleeve 63 may be provided with an inner hole, and the axial displacement member 65 may partially slide into the inner hole of the sleeve 63 driven by the electromagnetic coil 64.
  • the part of the axial displacement member 65 located outside the inner hole of the sleeve 63 may be fixed to the housing 20, and the outer circumferential surface of the part of the axial displacement member 65 that extends into the sleeve 63 engages with the inner circumferential surface of the sleeve 63, so that the axial displacement member 65 can hold the sleeve 63 and act on the outer circumferential surface of the input shaft 41 through the sleeve 63, thereby locking the transmission function of the coaxial reducer 40 to achieve a parking effect.
  • the electromagnetic coil 64 is de-energized, and the axial displacement member 65 can withdraw from the inner hole of the sleeve 63 under the action of the telescopic spring 66, thereby releasing the outer circumference of the input shaft 41, and the coaxial reducer 40 resumes the transmission function.
  • an inner hole may be provided on the side of the axial displacement member 65 facing the sleeve 63, and the axial displacement member 65 may slide and sleeve on the outer side of the sleeve 63.
  • the inner circumference of the inner hole of the axial displacement member 65 and the outer circumference of the sleeve 63 are engaged with each other, and the axial displacement member 65 is also able to hold the sleeve 63, and acts on the outer circumference of the input shaft 41 through the sleeve 63, locking the transmission function of the coaxial reducer 40 to achieve the parking effect.
  • the electromagnetic coil 64 is powered off, and the axial displacement member 65 can slide off the sleeve 63 under the action of the telescopic spring 66, thereby releasing the outer circumference of the input shaft 41, and the coaxial reducer 40 resumes the transmission function.
  • the expansion spring 66 may be implemented by a disc spring, a wave spring, or the like.

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  • Braking Arrangements (AREA)

Abstract

La présente demande concerne un appareil de freinage électromécanique pourvu d'un réducteur encastré, ainsi qu'un véhicule. L'appareil de freinage électromécanique comprend un boîtier, un moteur de frein, un réducteur coaxial et un étrier ; le moteur de frein est utilisé pour amener l'étrier à entraîner, par l'intermédiaire du réducteur coaxial, un plateau ; le boîtier est utilisé pour recevoir un stator et un rotor du moteur de frein et un train planétaire du réducteur coaxial ; le rotor est utilisé pour être en liaison de transmission avec le train planétaire ; le stator, le rotor et un arbre de sortie sont agencés de manière coaxiale ; et le train planétaire est au moins partiellement encastré dans un trou central du stator ou du rotor. Selon l'appareil de freinage électromécanique de la présente demande, l'encastrement, au moins partiel, du train planétaire dans le trou central du stator ou du rotor, réduit la dimension axiale de l'appareil de freinage électromécanique à des fins de miniaturisation.
PCT/CN2024/133080 2023-11-22 2024-11-20 Appareil de freinage électromécanique pourvu d'un réducteur encastré, système et véhicule Pending WO2025108285A1 (fr)

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CN117515068A (zh) * 2023-11-22 2024-02-06 华为数字能源技术有限公司 带内嵌式减速器的电子机械制动装置、系统和车辆
CN119160145A (zh) * 2024-09-14 2024-12-20 西部智车(重庆)科技有限公司 一种干式电子机械制动emb系统
CN120207295B (zh) * 2025-05-28 2025-08-01 格陆博科技有限公司 一种电子机械制动器驻车机构及控制方法

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WO2011118630A1 (fr) * 2010-03-24 2011-09-29 曙ブレーキ工業株式会社 Dispositif de freinage avec mécanisme de stationnement motorisé
KR20220146128A (ko) * 2021-04-23 2022-11-01 현대모비스 주식회사 인휠 구동 장치 및 이를 포함하는 자동차
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