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WO2025059862A1 - Moteur de moyeu - Google Patents

Moteur de moyeu Download PDF

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Publication number
WO2025059862A1
WO2025059862A1 PCT/CN2023/119733 CN2023119733W WO2025059862A1 WO 2025059862 A1 WO2025059862 A1 WO 2025059862A1 CN 2023119733 W CN2023119733 W CN 2023119733W WO 2025059862 A1 WO2025059862 A1 WO 2025059862A1
Authority
WO
WIPO (PCT)
Prior art keywords
hub
motor
hub cover
liquid cooling
bearing
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/CN2023/119733
Other languages
English (en)
Chinese (zh)
Inventor
周调调
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.)
Taizhou Huangyan Bochuang Industrial Design Co Ltd
Original Assignee
Taizhou Huangyan Bochuang Industrial Design 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 Taizhou Huangyan Bochuang Industrial Design Co Ltd filed Critical Taizhou Huangyan Bochuang Industrial Design Co Ltd
Priority to PCT/CN2023/119733 priority Critical patent/WO2025059862A1/fr
Publication of WO2025059862A1 publication Critical patent/WO2025059862A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K7/00—Disposition of motor in, or adjacent to, traction wheel
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/18—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/20—Stationary parts of the magnetic circuit with channels or ducts for flow of cooling medium
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K15/00—Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
    • H02K15/14—Casings; Enclosures; Supports
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/10—Casings or enclosures characterised by the shape, form or construction thereof with arrangements for protection from ingress, e.g. water or fingers
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/19—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil

Definitions

  • the present application relates to the field of electric motors, and more specifically to wheel hub motors.
  • In-wheel motors are motors that integrate the power system, transmission system and brake system and are placed inside the wheel hub. In-wheel motors can save a lot of transmission components, save layout space, reduce structural complexity, improve transmission efficiency, realize a variety of complex driving modes, and are easy to control. They are widely used in electric vehicles, new energy vehicles, robots and other fields.
  • hub motors are insufficient in heat dissipation and structural stability. Specifically, on the one hand, when the hub motor is in operation, the temperature rises. When the temperature of the permanent magnet in the hub motor rises to a preset threshold, demagnetization will occur. In severe cases, the enameled wire will be burned, affecting the working performance of the hub motor. Moreover, the higher the power of the hub motor, the higher the working temperature and the worse the heat dissipation performance. When designing the hub motor, a compromise has to be made between power and temperature.
  • the existing hub motor is installed on the frame structure through a middle shaft and a U-shaped flat fork that pass through the bearing of the hub motor, and is fixed by lock nuts at both ends of the middle shaft.
  • Such a structural design has the problem of stress concentration, and it is difficult to effectively disperse the stress of the U-shaped flat fork and the frame structure, which can easily cause the side cover of the hub motor to break during the assembly or disassembly of the hub motor.
  • the middle shaft is prone to wear during the long-term operation of the hub motor.
  • the existing hub motor is sealed by a TC oil seal, which is a double-lip oil seal with a self-tightening spring completely covered with rubber. After the middle shaft is worn, water can easily enter the bearing of the hub motor and then enter the interior of the hub motor.
  • a hub motor comprising:
  • stator part further comprising:
  • a hub cover assembly wherein the hub cover assembly has a hollow cavity and a liquid cooling groove, the hollow cavity is arranged in the middle of the hub cover assembly, wherein the hub cover assembly further includes a first liquid through port and a second liquid through port, the first liquid through port and the second liquid through port are respectively connected to the liquid cooling groove to form a liquid cooling passage; and a motor stator, the motor stator is sleeved on the hub cover assembly, and the motor stator is arranged around the liquid cooling groove.
  • the motor stator is in contact with the outer wall of the hub cover, and the motor stator is aligned with the liquid cooling groove.
  • the hub cover assembly further includes a first hub cover assembly and a second hub cover assembly, wherein the liquid cooling tank further has a first liquid cooling tank and a second liquid cooling tank, the first liquid cooling tank is arranged in the first hub cover assembly, and the second liquid cooling tank is arranged in the second hub cover assembly, wherein the first liquid cooling tank is aligned with the second liquid cooling tank so that the first liquid cooling tank is connected to the second liquid cooling tank.
  • the stator part further includes a sealing gasket, which is arranged between the first liquid cooling tank and the second liquid cooling tank, wherein the sealing gasket further has at least one liquid hole, and the at least one liquid hole is respectively aligned with the first liquid cooling tank and the second liquid cooling tank so that the first liquid cooling tank and the second liquid cooling tank are connected.
  • the first hub cover assembly further comprises:
  • first hub cover having a first sealing mounting position
  • a first bearing the bearing is sleeved on the first seal, wherein the outer edge of the first hub cover extends toward the outer surface of the first hub cover to form a first side wall, wherein the inner side of the side wall has a groove for installing the first seal, so that the first seal is arranged on the side of the first bearing, and the first seal is between the first seal installation position and the first bearing.
  • the first bearing further comprises a bearing frame and a plurality of balls, wherein the plurality of balls are made of ceramic material.
  • the second hub cover assembly further comprises:
  • a second seal wherein the first seal is sleeved on the first hub cover; and a second bearing, wherein the bearing is sleeved on the second seal, wherein the outer edge of the second hub cover extends toward the outer surface of the second hub cover to form a second side wall, wherein the inner side of the second side wall is provided with a groove for installing the second seal, so that the second seal is arranged on the side of the second bearing, and the second seal is between the second seal installation position and the second bearing.
  • the second bearing further comprises a bearing frame and a plurality of balls, wherein the plurality of balls are made of ceramic material.
  • the first hub cover further comprises two motor mounting positions, and the two motor mounting positions are respectively arranged at intervals on the inner surface of the first hub cover, wherein the first liquid port is arranged between the two motor mounting positions.
  • the motor mounting position protrudes from the inner surface of the first hub cover, and one of the two motor mounting positions is provided with a connecting wire outlet.
  • the second hub cover further comprises two motor mounting positions which are respectively arranged at intervals on the inner surface of the second hub cover, wherein the second liquid port is arranged between the two motor mounting positions.
  • the motor mounting position protrudes from the inner surface of the second hub cover, and one of the two motor mounting positions is provided with a connecting wire outlet.
  • the rotor portion further comprises:
  • a magnetic element mounting part and a group of magnetic elements, wherein the group of magnetic elements are arranged on the inner wall of the magnetic element mounting part, wherein the group of magnetic elements are mounted on the inner wall of the magnetic element mounting part and then sleeved on the motor stator, and the group of magnetic elements are arranged correspondingly to the motor stator.
  • the rotor portion further comprises a brake disc, and the brake disc is fixedly disposed on one side of the wheel rim.
  • the ratio of the inner diameter of the hollow cavity to the outer diameter of the hub motor is greater than or equal to 30%.
  • An advantage of the present application is that it provides a hub motor, wherein the hub motor can improve its heat dissipation performance and thus improve its driving efficiency.
  • Another advantage of the present application is that it provides a wheel hub motor, wherein the wheel hub motor can improve its structural stability and reliability.
  • Another advantage of the present application is that it provides a hub motor, wherein the hub motor can increase its heat dissipation space through a hollow structure, thereby improving its heat dissipation performance.
  • Another advantage of the present application is that it provides a hub motor, wherein the hub motor can further improve its heat dissipation performance by providing a liquid cooling structure. In this way, the hub motor greatly improves its heat dissipation performance under the dual effects of increased heat dissipation area and liquid cooling structure.
  • Another advantage of the present application is that it provides a hub motor, wherein the hub motor has an additional fulcrum (i.e., support point), which is suitable for being installed on an object to be assembled (e.g., a vehicle body, a robot body) through at least two rotating shafts, thereby playing a role in dispersing stress.
  • an additional fulcrum i.e., support point
  • Another advantage of the present application is that it provides a wheel hub motor, wherein the wheel hub motor has four additional support points.
  • Another advantage of the present application is that it provides a hub motor, wherein the hub motor avoids setting the force point at an internal structure thereof, so that even if the shaft is worn, water will not enter the internal structure of the hub motor due to the wear of the shaft.
  • Another advantage of the present application is that it provides a hub motor, wherein the hub motor is sealed using a low-friction structure of a water seal, which can not only effectively prevent water from entering the hub motor, but also extend the service life of the seal.
  • Another advantage of the present application is that a wheel hub motor is provided, wherein the wheel hub motor has a bearing sleeve disposed outside the hub cover, which can improve the overall strength of the wheel hub motor.
  • Another advantage of the present application is that it provides a hub motor, wherein the bearings of the hub motor use balls with a low friction coefficient, which can reduce friction, reduce the degree of wear during operation, and enhance the structural stability and reliability of the hub motor.
  • FIG. 1 illustrates a schematic diagram of the assembly of an existing wheel hub motor and a rotating shaft assembly.
  • FIG. 2 illustrates a schematic diagram of the assembly of a hub motor and a rotating shaft assembly according to an embodiment of the present application.
  • FIG. 3 illustrates a schematic perspective view of a hub motor according to an embodiment of the present application.
  • FIG. 4 illustrates an exploded schematic diagram of a wheel hub motor according to an embodiment of the present application.
  • FIG. 5 illustrates a disassembled schematic diagram of a hub motor according to an embodiment of the present application.
  • FIG. 6 illustrates another disassembled schematic diagram of the hub motor according to an embodiment of the present application.
  • FIG. 7 illustrates a partial cross-sectional schematic diagram of a hub motor according to an embodiment of the present application.
  • FIG. 8 is a perspective schematic diagram of a rotor portion of a hub motor according to an embodiment of the present application.
  • FIG. 9 illustrates a schematic perspective view of a stator portion of a hub motor according to an embodiment of the present application.
  • FIG. 10 illustrates a partial cross-sectional schematic diagram of a stator portion of a hub motor according to an embodiment of the present application.
  • FIG. 11 is a schematic flow chart of an assembly method of a hub motor according to an embodiment of the present application.
  • one should be understood as “at least one” or “one or more”, that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the element may be multiple, and the term “one” should not be understood as a limitation on the quantity.
  • ordinal numbers such as “first,””second,” etc. will be used to describe various components, those components are not limited herein. The term is used only to distinguish one component from another. For example, a first component may be referred to as a second component, and similarly, a second component may be referred to as a first component without departing from the teachings of the present application concept.
  • the term "and/or" as used herein includes any and all of one or more of the associated listed items. Department combination.
  • the hub motor 100 As shown in Figures 2 to 10, the hub motor 100 according to the embodiment of the present application is illustrated, and the hub motor 100 is suitable for use in vehicles such as electric bicycles, electric motorcycles, and new energy vehicles. It should be understood that although the hub motor 100 is used in a vehicle as an example, in other embodiments, the hub motor 100 can be used in other fields, such as robots, and is not limited to this application.
  • the motor structure is arranged in the middle of the wheel hub, and multiple components are sealed in the receiving cavity formed by the side cover.
  • the existing wheel hub motor 1P heat is easily accumulated inside the side cover.
  • the existing oil seal is directly in contact with the wheel axle and the electric wheel. During the rotation of the wheel axle, the oil seal is worn, and over time, damage is caused to the wheel hub motor.
  • the wheel hub of the present application has a hollow structure, which enlarges the heat dissipation area and thus improves its heat dissipation performance.
  • the wheel hub motor 100 has a cylindrical structure, and the inner peripheral wall of the cylindrical structure encloses the hollow structure.
  • the wheel hub motor 100 has a cylindrical structure, and the inner peripheral wall of the cylindrical structure encloses the hollow structure.
  • the hub motor 100 includes a rim portion 110.
  • the rim portion 110 has a hollow cavity 120.
  • the hollow cavity 120 is located in the middle of the rim.
  • the rim portion 110 has an outer surface and an inner surface, and the inner surface of the rim portion 110 encloses the hollow cavity 120.
  • the hollow cavity 120 extends inward from the inner surface of the rim portion 110 to the center point of the hub motor 100 in the radial direction set by the hub motor 100, and extends from the first surface of the hub motor 100 to the second surface in the axial direction set by the hub motor 100, that is, the hollow cavity 120 penetrates from the first surface of the hub motor 100 to the second surface. In this way, there are no excessive components piled up in the hollow cavity 120, which can provide sufficient heat dissipation space for the components of the rim portion 110.
  • the size of the hollow cavity 120 can be set according to actual needs.
  • the ratio of the inner diameter of the hollow cavity 120 to the outer diameter of the hub motor 100 is greater than or equal to 30%.
  • the ratio of the inner diameter of the hollow cavity 120 to the outer diameter of the hub motor 100 is greater than or equal to 40%.
  • the outer diameter of the hub motor 100 is 10 inches, which is approximately equal to 333.3 mm, and the inner diameter of the hollow cavity 120 is equal to 160.0 mm.
  • the ratio of the inner diameter of the hollow cavity 120 to the outer diameter of the hub motor 100 is approximately 48.0%.
  • the outer diameter of the wheel hub motor 100 is 12 inches, which is equal to 400.0 mm
  • the inner diameter of the hollow cavity 120 is equal to 182.9 mm
  • the ratio of the inner diameter of the hollow cavity 120 to the outer diameter of the wheel hub motor 100 is about 45.7%.
  • the inner diameter of the hollow cavity 120 and the outer diameter of the wheel hub motor 100 may also be other values, which are not limited by the present application.
  • a cavity is formed in the wheel rim portion 110 of the wheel hub motor 100 in the axial direction of the wheel hub motor 100 and does not penetrate the wheel hub motor 100.
  • the middle portion of the first surface of the wheel hub motor 100 is recessed toward the second surface to form a first cavity.
  • the middle part is recessed toward the first surface to form a second cavity, and the first cavity and the second cavity are spaced apart, that is, the first cavity and the second cavity are not connected to each other. There are no excessive components piled up in the first cavity and the second cavity, and sufficient heat dissipation space can also be provided for the components of the wheel rim 110.
  • the wheel hub motor 100 includes a stator part 10 and a rotor part 20.
  • the stator part 10 includes a stator periphery and a stator cavity formed in the stator periphery
  • the rotor part 20 includes a rotor periphery and a rotor cavity formed in the rotor periphery.
  • the rotor part 20 is sleeved outside the stator part 10, that is, the stator part 10 is sleeved in the rotor cavity of the rotor part 20.
  • the stator periphery of the stator part 10 forms the wheel rim part 110 of the wheel hub motor 100
  • the stator cavity of the stator part 10 forms the hollow cavity 120 of the wheel hub motor 100.
  • the stator part 10 further comprises a hub assembly 1 and a motor stator 13 , wherein the motor stator 13 is sleeved with the hub assembly 1 .
  • the hub assembly 1 further has a cavity and a liquid cooling tank 2 .
  • the wheel hub assembly 1 further comprises a first wheel hub assembly 11 and a second wheel hub motor 12.
  • the second wheel hub motor 12 is arranged opposite to the first wheel hub assembly 11.
  • the motor stator 13 is sleeved on the first wheel hub assembly 11 and the second wheel hub assembly 12.
  • the first hub assembly 11 includes a first hub cover 111, a first seal 112 sleeved on the first hub cover 111, and a first bearing 113 sleeved on the first hub cover 111.
  • the first hub cover 111 has a first seal installation position 1101 for installing the first seal 112, and a groove may be provided at the first seal installation position 1101 so that the first seal 112 is embedded in the groove.
  • the first hub cover 111 has a first cylindrical structure, and the inner wall of the first cylindrical structure encloses a first cavity.
  • the first hub cover 111 has a first cavity formed in the middle thereof.
  • the first seal 112 is attached to the first bearing 113 to achieve sealing at the first hub cover 111.
  • the first hub shell 111 The outer edge of the first hub shell 111 extends vertically toward the outer surface of the first hub shell 111 to form a first side wall 1111.
  • the first sealing installation position 1101 is arranged on the inner side of the first side wall 1111.
  • a groove is provided on the inner side of the first side wall 1111.
  • the first sealing member 112 is mounted in the groove.
  • the second hub assembly 12 includes a second hub cover 121, a second seal 122 sleeved on the second hub cover 121, and a second bearing 123 sleeved on the second hub cover 121.
  • the hub motor 100 also includes a mounting assembly 15, and the mounting assembly 15 includes a first fixing structure for fixing the first hub cover 111 and the second hub cover 121.
  • the first fixing structure includes a first fixing hole 151 provided on the first hub cover 111 and a first fixing hole 151 provided on the second hub cover 121, and a first fixing screw 152 matched with the first fixing hole 151, and the first hub cover 111 and the second hub cover 121 are fixed together by the first fixing screw 152.
  • the second hub cover 121 has a second sealing installation position 1201 for installing the second seal 122, and a groove can be provided at the second sealing installation position 1201, so that the second seal 122 is embedded in the groove.
  • the second hub cover 121 has a second cylindrical structure, and the inner wall of the second cylindrical structure encloses a second cavity.
  • the second hub cover 121 has a second cavity formed in the middle thereof.
  • the second seal 122 is fitted to the second bearing 123 to achieve sealing at the second hub cover 121.
  • the outer edge of the second hub shell 121 extends vertically toward the outer surface of the first hub shell 121 to form a first side wall 1211.
  • the first sealing mounting position 1201 is disposed on the inner side of the first side wall 1211. In other words, a groove is provided on the inner side of the first side wall 1211.
  • the first seal 122 is mounted in the groove in an engaging manner.
  • the first hub cover 111 is opposite to the second hub cover 121 in the axial direction set by the hub motor 100, the first cavity of the first hub cover 111 and the second cavity of the second hub cover 121 correspond to each other, the first cavity of the hub cover 111, the second cavity of the second hub cover 121, and the sealing gasket 14 described later corresponding to the first cavity of the first hub cover 111 and the second cavity of the second hub cover 121
  • the through hole forms a stator cavity of the stator part 10 , so that the hub motor 100 forms the hollow cavity 120 .
  • the motor stator 13 is used to wind the electromagnetic wire (i.e., enameled wire), that is, the electromagnetic wire is wound on the motor stator 13.
  • the electromagnetic wire wound on the motor stator 13 generates heat, and the motor stator 13 becomes the main heat source of the wheel hub motor 100.
  • the motor stator 13 is sleeved outside the first hub cover 111 and the second hub cover 121, and is interference fit with the first hub cover 111 and the second hub cover 121.
  • the first hub cover 111 and the second hub cover 121 can conduct heat to the motor stator 13.
  • the hollow cavity 120 formed by the first hub cover 111 and the second hub cover 121 can greatly improve the heat dissipation efficiency and improve the heat dissipation performance of the wheel hub motor 100. That is, the motor stator 13 transfers heat to the first hub cover 111 and the second hub cover 121 to effectively dissipate heat.
  • the motor stator 13 has three Hall installation positions 131 for installing Hall sensors. Accordingly, the first hub cover 111 and/or the second hub cover 121 is provided with a connection line outlet 1102, through which the Hall line or the phase line can pass.
  • the motor stator 13, the first seal 112, the first bearing 113, the second seal 122 and the second bearing 123 are mutually pressed in the axial direction set by the hub motor 100 to achieve the overall sealing of the hub motor 100. It is worth mentioning that the hub motor 100 is sealed by the low-friction structure of the water seal, which not only effectively prevents the hub motor 100 from water ingress, but also greatly increases the service life of the seals (including the first seal 112 and the second seal 122).
  • a liquid cooling structure is provided, so that the wheel hub motor 100 can greatly improve its heat dissipation performance under the dual effects of increased heat dissipation area and the liquid cooling structure.
  • the wheel hub motor 100 is provided with a liquid cooling groove in the hub cover part (i.e., the first hub cover 111 and/or the second hub cover 121).
  • the first hub cover 111 has a first liquid cooling groove 101
  • the second hub cover 121 has a second liquid cooling groove 102.
  • the first liquid cooling groove 101 and/or the second liquid cooling groove 102 correspond to the motor stator 13.
  • the end surface (i.e., the first end surface) of the first hub cover 111 opposite to the second hub cover 121 is partially recessed to form the first liquid cooling groove 101, and the first liquid cooling groove 101 is recessed inwardly from the first end surface of the first hub cover 111 along the axial direction set by the hub motor 100;
  • the second end surface of the second hub cover 121 opposite to the first hub cover 111 is partially recessed to form the second liquid cooling groove 102, and the second liquid cooling groove 102 is recessed inwardly from the second end surface of the second hub cover 121 along the axial direction set by the hub motor 100, and the first liquid cooling groove 101 and the second liquid cooling groove 102 are opposite.
  • the first liquid cooling groove 101 extends along the circumference of the first hub cover 111 to form a closed annular or non-closed annular groove body
  • the second liquid cooling groove 102 extends along the circumference of the second hub cover 121 to form a closed annular or non-closed annular groove body.
  • the sizes of the first liquid cooling groove 101 and the second liquid cooling groove 102 can be set according to actual needs.
  • the size of the first liquid cooling groove 101 is 4mm*20mm
  • the size of the second liquid cooling groove 102 is 4mm*20mm. That is, the depth of the first liquid cooling groove 101 and the second liquid cooling groove 102 are both 4mm, and the outer diameters of the first liquid cooling groove 101 and the second liquid cooling groove 102 are both 20mm.
  • first liquid cooling tank 101 and the second liquid cooling tank 102 is not limited by the present application.
  • the layout, shape, and size of the first liquid cooling tank 101 and the second liquid cooling tank 102 may be consistent or inconsistent, and are not limited by the present application.
  • the first hub cover 111 has a first liquid opening 1103 connected to the first liquid cooling tank 101
  • the second hub cover 121 has a second liquid opening 1203 connected to the second liquid cooling tank 102.
  • the first liquid opening 1103 can be used as a liquid inlet and/or a liquid outlet for the coolant
  • the second liquid opening 1203 can be used as a liquid inlet and/or a liquid outlet for the coolant.
  • Port 1203 may serve as an inlet and/or outlet for the cooling liquid.
  • the first liquid cooling tank 101 is connected to the second liquid cooling tank 102, that is, the first liquid cooling tank 101 and the second liquid cooling tank 102 are connected to each other.
  • the first hub cover 111 and the second hub cover 121 can share a liquid through port.
  • the stator part 10 further includes a sealing gasket 14 disposed between the first hub cover 111 and the second hub cover 121.
  • the sealing gasket 14 has through holes corresponding to the first cavity of the first hub cover 111 and the second cavity of the second hub cover 121, and at least one liquid hole 141 connected between the first liquid cooling tank 101 and the second liquid cooling tank 102, so as to achieve the connection between the first liquid cooling tank 101 and the second liquid cooling tank 102, so that the hub motor 100 can achieve better circulation heat dissipation.
  • first liquid cooling tank 101 and the second liquid cooling tank 102 may also be independent of each other, that is, not connected to each other, which is not limited to the present application.
  • the existing wheel hub motor 1P has deficiencies in structural stability.
  • the bearing of the existing wheel hub motor 1P is arranged in the middle 11P thereof and is installed on the frame structure through the shaft assembly 2P, wherein the shaft assembly 2P includes a middle shaft 21P passing through the bearing of the wheel hub motor 1P and a U-shaped flat fork 22P installed on the frame structure and fixed by lock nuts at both ends of the middle shaft 21P.
  • Such a structural design has the problem of stress concentration, and it is difficult to effectively disperse the stress of the U-shaped flat fork 22P and the frame structure, which easily leads to the rupture of the side cover of the wheel hub motor 1P during the assembly or disassembly of the wheel hub motor 1P.
  • the middle shaft 21P is easy to wear.
  • the existing wheel hub motor 1P is sealed by a TC oil seal, which is a double-lip oil seal with a self-tightening spring completely covered with rubber. After the middle shaft 21P is worn, water easily enters the bearing of the wheel hub motor 1P, and then enters the interior of the wheel hub motor 1P, affecting the working performance of the wheel hub motor 1P.
  • the overall structural stability of the hub motor 100 is improved by the structure of the bearing and the arrangement of the motor mounting position for inserting the rotating shaft 210.
  • the wheel hub motor 100 uses a large bearing, the first bearing 113 is sleeved outside the first hub cover 111, and the second bearing 123 is sleeved outside the second hub cover 121, which can improve the overall strength of the wheel hub motor 100 to a certain extent.
  • the first bearing 113 includes a bearing frame 60 and a plurality of balls 70 disposed on the bearing frame 60
  • the second bearing 123 includes a bearing frame 60 and a plurality of balls 70 disposed on the bearing frame 60.
  • the first bearing 113 and the second bearing 123 use balls 70 with a smaller friction coefficient, which can reduce friction, reduce the degree of wear during operation, and better disperse structural stress.
  • the friction coefficient of the balls 70 of the first bearing 113 is less than or equal to 0.05
  • the friction coefficient of the balls 70 of the second bearing 123 is less than or equal to 0.05.
  • the balls 70 of the first bearing 113 are made of ceramic material
  • the balls 70 of the second bearing 123 are made of ceramic material.
  • the friction coefficient of the balls 70 of the first bearing 113 is 0.001 to 0.005
  • the friction coefficient of the balls 70 of the second bearing 123 is 0.001 to 0.005.
  • the hub motor 100 has an additional fulcrum (i.e., support point), which is suitable for being installed on an object to be assembled (e.g., a vehicle body, a robot body) through at least two rotating shafts 210, so as to disperse stress.
  • the hub motor 100 includes a first motor mounting position 1301 for mounting a first rotating shaft, which forms a first fulcrum, and a second motor mounting position 1302 for mounting a second rotating shaft, which forms a second fulcrum, and is suitable for being installed on an object to be assembled through a Y-shaped support frame 220 and two rotating shafts 210.
  • the hub motor 100 avoids the internal structure of the hub motor 100 by setting the fulcrum. Even if the rotating shaft 210 is worn, water will not enter the internal structure of the hub motor 100 due to the wear of the rotating shaft 210.
  • the wheel hub motor 100 includes an extension portion 130 extending inward from a portion of the wheel rim portion 110, that is, the wheel hub motor 100 includes an extension portion 130 extending inward from a portion of the wheel rim portion 110, the first motor mounting position 1301 and the second motor mounting position 1302 are formed in the extension portion 130, and the first motor
  • the mounting position 1301 has a pair of first hole structures opposite to each other in the axial direction set by the wheel hub motor 100, and is used to mount the first rotating shaft.
  • the second motor mounting position 1302 has a pair of second hole structures opposite to each other in the axial direction set by the wheel hub motor 100, and is used to mount the second rotating shaft.
  • the first hole structure and the second hole structure do not overlap. In this way, the pair of first hole structures and the pair of second hole structures form four points of force, which can effectively share the structural stress.
  • the first hub cover 111 has two first protrusions extending partially inward from the inner wall of the first hub cover 111
  • the second hub cover 121 has two second protrusions extending partially inward from the inner wall of the second hub cover 121, and the two first protrusions and the two second protrusions form the extension portion 130, and one of the two first protrusions corresponds to one of the two second protrusions to form the first motor mounting position 1301, and the other first protrusion of the two first protrusions corresponds to the other second protrusion of the two second protrusions to form the second motor mounting position 1302.
  • the first motor mounting position 1301 and the second motor mounting position 1302 extend integrally from the outer periphery 110, that is, the first motor mounting position 1301 and the second motor mounting position 1302 are integrally connected to the outer periphery 110.
  • the first motor mounting position 1301 and the second motor mounting position 1302 can also be detachably disposed on the outer periphery 110, and when the rotating shaft 210, or the first hole structure and the second hole structure are worn, a new motor mounting position can be replaced. Accordingly, the first motor mounting position 1301 and the second motor mounting position 1302 can be detachably disposed on the first hub cover 111 and the second hub cover 121.
  • the line between the center of the first hole structure formed at the first motor mounting position 1301 and the center of the second hole structure formed at the second motor mounting position 1302 on the same side as the first hole structure deviates from the radial symmetry axis of the first hub cover 111 or the second hub cover 121.
  • first hub cover 111 and the second hub cover 121 have an annular cross-section, and the diameter of the first hub cover 111 is
  • the radial symmetry axis is an axis passing through the center (center of a circle) of the annular cross section of the first hub cover 111
  • the radial symmetry axis of the second hub cover 121 is an axis passing through the center (center of a circle) of the annular cross section of the second hub cover 121 .
  • the line between the center of the first hole structure formed at the first motor mounting position 1301 and the center of the second hole structure formed at the second motor mounting position 1302 on the same side as the first hole structure may also coincide with the radial symmetry axis of the first hub cover 111 or the second hub cover 121 .
  • the rotor part 20 of the hub motor 100 is sleeved on the rotor part 20 outside the stator part 10.
  • the rotor part 20 includes a wheel rim 21, a magnetic element mounting member 22, a group of magnetic elements 23 and a brake disc 24.
  • the tire 300 can be sleeved outside the wheel rim 21 of the rotor part 20.
  • the wheel rim 21 has a valve nozzle mounting hole 211 for connecting the tire 300.
  • the mounting assembly 15 further includes a second fixing structure for mounting the brake disc 24, the second fixing structure includes at least one second fixing hole 153 formed on the wheel rim 21 and a second fixing screw 154 matching the second fixing hole 153, and the brake disc 24 can be fixed to the wheel rim 21 by the second fixing screw 154 in cooperation with the second fixing hole 153.
  • the number of the second fixing holes 153 is set according to demand.
  • the mounting assembly 15 includes six second fixing holes 153, that is, the number of the second fixing holes 153 is 6, and the gap between each adjacent second fixing holes 153 of each second fixing hole 153 is equal, that is, each second fixing hole 153 is equidistantly arranged on the wheel rim 21.
  • the number of the second fixing holes 153 can be other values, for example, 2, 3, 4, 5, etc.
  • the magnetic element mounting member 22 is arranged on the inner peripheral wall of the wheel rim 21 for mounting the magnetic element 23.
  • the magnetic element mounting member 22 can be implemented as an iron ring.
  • the magnetic element mounting member 22 is integrally formed on the wheel rim 21 by casting, die casting or other methods. That is, the magnetic element mounting member 22 is The mounting member 22 and the wheel rim 21 form an integrated structure. Further, the magnetic element mounting member 22 can be embedded in the wheel rim 21. In other specific examples of the present application, the magnetic element mounting member 22 and the wheel rim 21 can be a split structure, which is not limited to the present application.
  • the rotor part 20 includes a plurality of magnetic elements 23, and the plurality of magnetic elements 23 are arranged on the inner wall of the magnetic element mounting part 22.
  • the magnetic elements 23 correspond to the motor stator 13, so that after the hub motor 100 is turned on, a cutting magnetic flux line is formed between the rotor part 20 and the stator part 10, thereby enabling the rotor to operate efficiently.
  • the hub motor 100 based on the embodiment of the present application is explained, and the hub motor 100 provides a structural design solution for improving heat dissipation performance and structural stability, so that the comprehensive performance of the hub motor 100 is improved.
  • a method for assembling a hub motor is also provided, which is used to assemble the hub motor 100 as described above. Referring to Figure 11 of the accompanying drawings of the specification, the method for assembling the hub motor 100 according to the embodiment of the present application is explained.
  • the method for assembling the hub motor 100 includes: S110, forming a first hub assembly 11, wherein the first hub assembly 11 includes a first hub cover 111, a first seal 112 sleeved on the outside of the first hub cover 111, and a first bearing 113 sleeved on the outside of the first hub cover 111, and the first hub cover 111 has a first cavity; S120, pressing the first hub assembly 11 into the motor stator 13; S130, forming a first rotor assembly, wherein the first rotor assembly The component comprises a wheel rim 21, a magnetic element mounting component 22 formed on the inner peripheral wall of the wheel rim 21, and a magnetic element 23 arranged on the magnetic element mounting component 22; S140, pressing the motor stator 13 and the first hub assembly 11 pressed into the motor stator 13 into the first rotor assembly; S150, placing a sealing gasket 14 in the first rotor assembly, wherein the sealing gasket 14 is attached to the first hub assembly 11;
  • a first hub assembly 11 is formed. Specifically, first, a first seal 112 is sleeved outside the first hub cover 111 and installed in a first seal installation position 1101 of the first hub cover 111, wherein the first hub cover 111 has a first cavity and a first liquid cooling tank 101; then, a first bearing 113 is sleeved outside the first hub cover 111, wherein the first bearing 113 is attached to the first seal 112.
  • step S120 the first hub assembly 11 is pressed into the motor stator 13.
  • the motor stator 13 is wound with electromagnetic wires and equipped with a Hall sensor.
  • the first bearing 113 is pressed into the motor stator 13, and the phase line and the Hall line are passed through the connection line outlet 1102 of the first hub assembly 11.
  • a first rotor assembly is formed. Specifically, first, the magnetic element mounting member 22 is assembled on the inner peripheral wall of the wheel rim 21 by pouring and die-casting, and the magnetic element mounting member 22 can be implemented as an iron ring; then, the magnetic element 23 is arranged on the inner periphery of the magnetic element mounting member 22 .
  • step S140 the motor stator 13 and the first hub assembly 11 pressed into the motor stator 13 are pressed into the first rotor assembly. Specifically, during the process of pressing the first stator assembly into the first rotor assembly, the motor stator 13 is aligned with the magnetic element 23 of the first rotor assembly.
  • step S150 the sealing gasket 14 is placed in the first rotor assembly.
  • the sealing gasket 14 has at least one liquid passage hole 141, the sealing gasket 14 is attached to the first hub cover 111 of the first hub assembly 11, and at least one liquid passage hole 141 corresponds to the first liquid-cooling tank 101 , so that the liquid hole 141 is connected to the first liquid-cooling tank 101 .
  • step S160 the second hub assembly 12 is formed. Specifically, first, the second seal 122 is sleeved on the outside of the second hub cover 121 and installed in the second seal installation position 1201 of the second hub cover 121, wherein the second hub cover 121 has a second cavity and a second liquid cooling groove 102; then, the second bearing 123 is sleeved on the second hub cover 121, wherein the second bearing 123 is fitted to the second seal 122.
  • the second hub assembly 12 is pressed into the motor stator 13 located in the first rotor assembly.
  • the second hub is fixed to the first hub, and the first cavity corresponds to the second cavity to form a hollow cavity 120.
  • the first hub and the second hub have first fixing holes 151 corresponding to each other, and the second hub can be fixed to the first hub by a first fixing screw 152 in cooperation with the first fixing hole 151.
  • the sealing gasket 14 is clamped between the first hub cover 111 and the second hub cover 121, and at least one liquid hole 141 of the sealing gasket 14 corresponds to the liquid cooling groove of the second hub cover 121, so that the liquid hole 141 is connected to the second liquid cooling groove 102.
  • step S180 the brake disc 24 is fixed to the first rotor assembly.
  • the wheel rim 21 of the first rotor assembly and the brake disc 24 have corresponding second fixing holes 153, and the brake disc 24 can be fixed to the wheel rim 21 by the second fixing screw 154 in cooperation with the second fixing hole 153.
  • the assembly method of the hub motor 100 based on the embodiment of the present application is explained, and the hub motor 100 formed by the assembly method of the hub motor 100 has good heat dissipation performance and high structural stability.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Arrangement Or Mounting Of Propulsion Units For Vehicles (AREA)

Abstract

La présente invention concerne un moteur de moyeu (100), le moteur de moyeu (100) comprenant une partie rebord (110). La partie rebord (110) est pourvue d'une cavité creuse (120), et la cavité creuse (120) est située au milieu de la partie rebord (110). Le moteur de moyeu (100) utilise la cavité creuse (120) pour augmenter l'espace de dissipation de chaleur, améliorant les performances de dissipation de chaleur.
PCT/CN2023/119733 2023-09-19 2023-09-19 Moteur de moyeu Pending WO2025059862A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CN2023/119733 WO2025059862A1 (fr) 2023-09-19 2023-09-19 Moteur de moyeu

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2023/119733 WO2025059862A1 (fr) 2023-09-19 2023-09-19 Moteur de moyeu

Publications (1)

Publication Number Publication Date
WO2025059862A1 true WO2025059862A1 (fr) 2025-03-27

Family

ID=95073138

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2023/119733 Pending WO2025059862A1 (fr) 2023-09-19 2023-09-19 Moteur de moyeu

Country Status (1)

Country Link
WO (1) WO2025059862A1 (fr)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN204465295U (zh) * 2015-02-10 2015-07-08 王锦帅 外转子永磁同步电机
CN108599411A (zh) * 2018-07-19 2018-09-28 扬州大学 一种轮毂电机的定子水冷结构
CN109155547A (zh) * 2016-12-14 2019-01-04 普罗蒂恩电子有限公司 用于电机或发电机的定子
CN213521578U (zh) * 2020-10-26 2021-06-22 八方电气(苏州)股份有限公司 一种新型轮毂电机集成控制器装置
CN113872367A (zh) * 2021-09-22 2021-12-31 东风电驱动系统有限公司 一种轮毂电机
KR102437432B1 (ko) * 2022-04-21 2022-08-26 연제혁 전동퀵보드용 허브모터 냉각시스템 및 이를 구비한 전동퀵보드
CN115459479A (zh) * 2022-11-11 2022-12-09 台州市黄岩博创工业设计股份有限公司 轮毂电机

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN204465295U (zh) * 2015-02-10 2015-07-08 王锦帅 外转子永磁同步电机
CN109155547A (zh) * 2016-12-14 2019-01-04 普罗蒂恩电子有限公司 用于电机或发电机的定子
CN108599411A (zh) * 2018-07-19 2018-09-28 扬州大学 一种轮毂电机的定子水冷结构
CN213521578U (zh) * 2020-10-26 2021-06-22 八方电气(苏州)股份有限公司 一种新型轮毂电机集成控制器装置
CN113872367A (zh) * 2021-09-22 2021-12-31 东风电驱动系统有限公司 一种轮毂电机
KR102437432B1 (ko) * 2022-04-21 2022-08-26 연제혁 전동퀵보드용 허브모터 냉각시스템 및 이를 구비한 전동퀵보드
CN115459479A (zh) * 2022-11-11 2022-12-09 台州市黄岩博创工业设计股份有限公司 轮毂电机

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