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US20090078528A1 - Drum rotating apparatus for use on construction machines - Google Patents

Drum rotating apparatus for use on construction machines Download PDF

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Publication number
US20090078528A1
US20090078528A1 US11/910,808 US91080806A US2009078528A1 US 20090078528 A1 US20090078528 A1 US 20090078528A1 US 91080806 A US91080806 A US 91080806A US 2009078528 A1 US2009078528 A1 US 2009078528A1
Authority
US
United States
Prior art keywords
support member
electric motor
axial end
drum
coupling
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.)
Abandoned
Application number
US11/910,808
Other languages
English (en)
Inventor
Nobuo Uzawa
Atsushi Tanaka
Masami Ochiai
Tadahiro Shimozono
Yoshiomi Jojima
Takeshi Obata
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.)
Hitachi Construction Machinery Co Ltd
Hitachi Industrial Equipment Systems Co Ltd
Original Assignee
Individual
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 Individual filed Critical Individual
Assigned to HITACHI CONSTRUCTION MACHINERY CO., LTD., HITACHI INDUSTRIAL EQUIPMENT SYSTEMS CO., LTD. reassignment HITACHI CONSTRUCTION MACHINERY CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: JOJIMA, YOSHIOMI, OBATA, TAKESHI, OCHIAI, MASAMI, SHIMOZONO, TADAHIRO, TANAKA, ATSUSHI, UZAWA, NOBUO
Publication of US20090078528A1 publication Critical patent/US20090078528A1/en
Abandoned legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D55/00—Endless track vehicles
    • B62D55/08—Endless track units; Parts thereof
    • B62D55/12—Arrangement, location, or adaptation of driving sprockets
    • B62D55/125—Final drives
    • 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
    • B60K17/00—Arrangement or mounting of transmissions in vehicles
    • B60K17/04—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location or kind of gearing
    • B60K17/043—Transmission unit disposed in on near the vehicle wheel, or between the differential gear unit and the wheel
    • B60K17/046—Transmission unit disposed in on near the vehicle wheel, or between the differential gear unit and the wheel with planetary gearing having orbital motion
    • 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
    • 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
    • B60K7/0007—Disposition of motor in, or adjacent to, traction wheel the motor being electric
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/02—Travelling-gear, e.g. associated with slewing gears
    • 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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
    • H02K7/102—Structural association with clutches, brakes, gears, pulleys or mechanical starters with friction brakes
    • H02K7/1021—Magnetically influenced friction brakes
    • H02K7/1023—Magnetically influenced friction brakes using electromagnets
    • H02K7/1025—Magnetically influenced friction brakes using electromagnets using axial electromagnets with generally annular air gap
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
    • H02K7/116—Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears
    • 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
    • B60K2007/0038—Disposition of motor in, or adjacent to, traction wheel the motor moving together with the wheel axle
    • 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
    • B60K2007/0092—Disposition of motor in, or adjacent to, traction wheel the motor axle being coaxial to the wheel axle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2200/00—Type of vehicles
    • B60L2200/40—Working vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2220/00—Electrical machine types; Structures or applications thereof
    • B60L2220/40—Electrical machine applications
    • B60L2220/44—Wheel Hub motors, i.e. integrated in the wheel hub
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2200/00—Type of vehicle
    • B60Y2200/40—Special vehicles
    • B60Y2200/41—Construction vehicles, e.g. graders, excavators
    • 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
    • F16D2121/20—Electric or magnetic using electromagnets
    • F16D2121/22—Electric or magnetic using electromagnets for releasing a normally applied brake
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/64—Electric machine technologies in electromobility

Definitions

  • This invention relates to a drum rotating apparatus particularly suitable for use in a construction machine, for example, a vehicle drive unit for a hydraulic excavator, a hydraulic crane or a rope winch drum.
  • vehicle drive units of construction machines such as hydraulic excavators, wheel loaders and the like employ a drum rotating apparatus for rotating a drum member on which a sprocket is mounted, for driving a crawler belt or for rotating a drum member on which a vehicle wheel is mounted.
  • a drum rotating apparatus is used on a rope winch which is mounted, for example, on a hydraulic crane for winding and unwinding a rope by rotating a drum member (e.g., see, for example, Japanese Patent Laid-Open No. 2000-9017, H1-153840 and S60-183498).
  • the prior art drum rotating apparatuses are largely constituted by a hydraulic motor serving as a drive source, a reducing mechanism which is located on the inner peripheral side of a drum member for reducing the speed in transmitting rotation of the hydraulic motor to the drum member, and a coupling shaft which couples an output shaft of the hydraulic motor with the reducing mechanism.
  • a drum member is rotated with a large torque by reducing the speed of rotation of a hydraulic motor through a reducing mechanism.
  • a drum rotating apparatus of this sort is provided with a negative type wet multiple disc brake, applying the brakes to the coupling shaft when the hydraulic motor is at rest and taking the brakes off when the hydraulic motor is in rotation.
  • a wet type multiple disc brake of a compact form is provided on the inner peripheral side of a drum member along with a reducing mechanism for compactification of a drum rotating apparatus as a whole.
  • the hydraulic motor which is provided in the drum rotating apparatus rotate an output shaft by supplying pressure oil from a hydraulic pump which is driven by an engine. Therefore, there has been a serious problem of pollution of environments by exhaust gases emanated from an engine during a drum rotating apparatus is in operation, in addition to a problem that a working environment is degraded to a considerable degree by operational noises of the engine.
  • a drum rotating apparatus using an electric motor in place of a hydraulic motor as a drive source.
  • an electric motor is driven by power supplied from a power source like a battery, for the purpose of suppressing emissions of exhaust gases and operational noises (e.g., see, for example Japanese Patent Laid-Open No. H11-155256).
  • a drum rotating apparatus for a construction machine having a negative type dry electromagnetic brake accommodated inside of the inner periphery of a drum member in a compact form and in a shielded state from lubricant oil.
  • a drum rotating apparatus for use on a construction machine which is characterized by the provision of:
  • a support member of a tubular shape open at one axial end and closed with a lid portion at the other axial end thereof, the support member being securely fixed on a basis of a construction machine; an electric motor located at one axial end of the support member, the electric motor having an output shaft extended axially toward the support member and being connected to an external power supply to rotate the output shaft; a drum member of a tubular shape, open at one axial end and closed at the other axial end thereof, the drum member being rotatably supported on outer peripheral side of the support member at one axial end through bearings; a reduction gear mechanism immersed in a lubricant oil within the drum member, the reduction gear mechanism having a single or multiple reduction stages to rotate the drum member at a reduced speed; a coupling shaft extended axially in and through the support member, the coupling shaft having one axial end connected to the output shaft of the electric motor and the other axial end rotatably supported in the lid portion of the support member and coupled with the reduction gear mechanism; a negative type dry electromagnetic brake
  • an interstice between the support member and an opening at one axial end of the drum member is sealed up liquid tight by the first seal member, while an interstice between the lid portion of the support member and the coupling shaft is sealed up liquid tight by the second seal member, shielding the negative type dry electromagnetic brake within the support member from the lubricant oil in the drum member.
  • a dry electromagnetic brake brakes can be applied to the coupling shaft when the electric motor is at rest and take the brakes off the coupling shaft when the electric motor is in rotation.
  • the dry electromagnetic brake shielded from the lubricant oil, is accommodated in a compact form within the support member which the electric motor and the reduction gear mechanism are provided, making it possible to compactify the entirety of the drum rotating apparatus incorporating the dry electromagnetic brake.
  • a couple of the dry electromagnetic brakes are provided in spaced positions in the axial direction of the coupling shaft.
  • a couple of the dry electromagnetic brakes are adapted to be assembled into the support member commonly in the same direction toward the lid portion through and from the side of an opening at one axial end of the support member.
  • the two dry electromagnetic brakes can be assembled into the support member in the same direction from and through an opening at one axial end of the support member. This permits to assemble the dry electromagnetic brakes into the support member in an efficient manner.
  • the coupling shaft is composed of a coupling having one axial end connected to the output shaft of the electric motor and provided with a spline on the outer periphery thereof, and an input shaft having one axial end connected to the coupling and the other axial end connected to the reduction gear mechanism;
  • the dry electromagnetic brake being comprised of a rotatable disc meshed with the spline of the coupling for rotation therewith, an non-rotatable disc adapted to be brought into and out of frictional engagement with the rotatable disc by a displacement in an axial direction of the coupling, and an electromagnetic coil excited by a power supply from outside to disengage the non-rotatable disc from the rotatable disc.
  • the coupling shaft which couples the output shaft of the electric motor with the reduction gear mechanism is constituted by a coupling and an input shaft. Therefore, for example, after connecting the input shaft with the reduction gear mechanism, the input shaft can be easily connected with the output shaft of the electric motor by the coupling. Thus, the output shaft of the electric motor can be coupled with the reduction gear mechanism in an efficient manner.
  • the drum rotating apparatus further comprising a connector accommodation room provided upward of the dry electromagnetic brake within the support member fixed on the basis, and a connector mounted in the connector accommodation room to connect external wiring to internal wiring leading to the dry electromagnetic brake.
  • the connector can be kept out of contact with rain water to guarantee higher reliability of the electromagnetic brake.
  • the basis constitutes a truck frame of a crawler type lower structure of the construction machine
  • the drum member is provided with a sprocket fixedly on the outer periphery thereof for meshing engagement with a crawler belt
  • both of the electric motor and the reduction gear mechanism are located within a width of the crawler belt in transverse direction.
  • both of the electric motor and the reduction gear mechanism can be located within the width of a crawler belt, without being projected on the outer side. Therefore, when the crawler type vehicle is traveling on a rough terrain, the electric motor and the reduction gear mechanism can be protected from rocks or other obstacles to guarantee higher reliability of the vehicle drive unit.
  • FIG. 1 is a front elevation of a hydraulic excavator with a vehicle drive unit incorporating a drum rotating apparatus according to a first embodiment of the present invention
  • FIG. 2 is an outer view of a truck frame and a vehicle drive unit of the hydraulic excavator
  • FIG. 3 is a sectional view of the vehicle drive unit shown in FIG. 2 ;
  • FIG. 4 is an enlarged sectional view showing essential parts such as a support member, an electric motor, a planetary reduction gear mechanism and dry type electromagnetic brakes;
  • FIG. 5 is a sectional view of the dry type electromagnetic brakes in a position for applying the brakes to an output shaft
  • FIG. 6 is a sectional view of the dry type electromagnetic brakes in a position for taking the brakes off the output shaft
  • FIG. 7 is an enlarged sectional view similar to FIG. 4 but showing a vehicle drive unit incorporating a drum rotating apparatus according to a second embodiment of the present invention.
  • FIG. 8 is a sectional view similar to FIG. 5 but showing essential parts of a third embodiment of the present invention.
  • drum rotating apparatus of the construction machine is described more particularly by way of its preferred embodiments applied by way of example to a hydraulic excavator with electric-powered vehicle drive units.
  • FIGS. 1 through 6 there is shown a first embodiment of the present invention.
  • an electric-motorized hydraulic excavator In these figures, indicated at 1 is an electric-motorized hydraulic excavator.
  • This electric-motorized hydraulic excavator 1 is largely constituted by an automotive lower structure 2 and an upper revolving structure 7 which is rotatably mounted on the lower structure 2 which will be described hereinafter.
  • the lower structure 2 is provided with a truck frame 3 which is composed of a center frame 3 A and right and left side frames 3 B.
  • the truck frame 3 of this embodiment constitutes a basis of the hydraulic excavator 1 .
  • An endless crawler belt 6 is wrapped around a sprocket 4 and an idler 5 which are provided at rear and front ends of each side frame 3 B, respectively.
  • brackets 3 C are projected from the rear end of the side frame 3 B for mounting a support member 12 which will be described hereinafter.
  • a motor cover 3 D is fitted on the outer periphery of the brackets 3 C.
  • the upper revolving structure 7 is largely constituted by a housing 8 and a cab 9 .
  • the housing 8 is largely constituted by a swing frame 8 A which is rotatably mounted on the truck frame 3 , and a housing cover 8 B which is provided on the swing frame 8 A to accommodate a battery, an electric motor, a hydraulic pump, an operating oil tank and so forth (none of which is shown in the drawings).
  • the cab 9 is built on a left front portion of the swing frame 8 A, defining an operating room thereon.
  • the front working mechanism 10 is constituted by a boom 10 A which is pivotally supported on the swing frame 8 A at its a base end through a pin, an arm 10 B which is pivotally connected to a fore distal end of the boom 10 A through a pin, a bucket 10 C which is pivotally supported on a fore distal end of the arm 10 B through a pin, a boom cylinder 10 D, an arm cylinder 10 E and a bucket cylinder 10 F.
  • operating pressure oil is supplied to the respective cylinders 10 D, 10 E and 10 F of the working mechanism 10 from a hydraulic pump (not shown) which is accommodated in the housing cover 8 B.
  • Shown at 11 is a vehicle drive unit of the lower structure 2 , a typical example of application of the drum rotating apparatus according to the invention.
  • the vehicle drive unit 11 is provided on each one of the left and right side frames 3 B of the truck frame 3 .
  • each vehicle drive unit 11 is constituted by a support member 12 , an electric motor 14 , a drum member 15 , a planetary reduction gear mechanism 21 and dry electromagnetic brake or brakes 30 .
  • the support member 12 is formed in the shape of a stepped and lidded tube which is extended in the axial direction (in a rightward or leftward direction).
  • the support member 12 is provided with an axially extending tubular body portion 12 A with an opening 12 B at one axial end.
  • An annular flange portion 12 C is provided around the opening 12 B.
  • the annular flange portion 12 C of the support member 12 is fixed to the brackets 3 C at the rear end of the side frame 3 B by means of bolts 13 .
  • the opposite axial end of the tubular body portion 12 A is closed with a lid portion 12 D which is centrally provided with an axial bore 12 E to receive an input shaft 28 (see FIG. 5 ), which will be described hereinafter.
  • a brake accommodation room 12 F to accommodate dry electromagnetic brakes 30 which will be described later on.
  • a connector accommodation room 12 G is provided upward of the dry electromagnetic brakes 30 within the support member 12 which is attached to the truck frame 3 .
  • a spline 12 H is formed on the outer periphery of the tubular body portion 12 A for meshing engagement with a carrier 25 C of a planetary reduction gear mechanism 21 which will be described hereinafter.
  • the electric motor 14 is an AC motor composed of an output shaft 14 B which is rotatably supported within a motor casing 14 A and axially extended within the support member 12 , a rotor 14 C which is provided integrally around the outer periphery of the output shaft 14 B, and a stator 14 D which is located on the outer peripheral side of the rotor 14 C.
  • the electric motor 14 receives a power supply from a battery which is accommodated within the housing cover 8 B after conversion into alternate current by an inverter or the like (both the battery and inverter are not shown in the drawings).
  • a terminal box 14 E is mounted on the upper side of the motor casing 14 A, the electric motor 14 including the terminal box 14 E is enshrouded in a motor cover 3 D of the bracket 3 C.
  • a drum member which is roratably provided on the outer peripheral side of the support member 12 .
  • this drum member 15 is formed generally in the shape of a stepped and lidded tube as a whole.
  • the drum member 15 is comprised of a large-diameter tubular body 16 with an opening 16 A at one axial end, a tubular ring gear 17 which is attached to the other axial end of the tubular body 16 and formed with an internal gear 17 A on its inner periphery, and a lid member 18 in the form of a circular disk closing the other axial end of the ring gear 17 liquid tight.
  • a plural number of bearings 19 are provided between the opening 16 A of the tubular body 16 and the outer periphery of the tubular body portion 12 A of the support member 12 .
  • the drum member 15 is rotatably supported on and around the outer periphery of the tubular body portion 12 A of the support member 12 through the bearings 19 .
  • a sprocket 4 is fixed to an annular flange 16 B which is provided around the opening 16 A of the tubular body 16 .
  • Indicated at 21 is a planetary reduction gear mechanism which is accommodated in the drum member 15 .
  • This planetary reduction gear mechanism 21 transmits the rotation of the output shaft 14 B of the electric motor 14 to the drum member 15 at a reduced speed to rotate the drum member 15 at a reduced speed and with a large torque.
  • the planetary reduction gear mechanism 21 is constituted by planetary reduction gear mechanisms 23 , 24 and 25 with three speed reduction stages which will be described hereinafter and immersed in lubricant oil 22 which is held in the drum member 15 .
  • the planetary reduction gear mechanism 21 is constantly lubricated by the lubricant oil 22 and can be put in smooth operation over a long period of time.
  • Designated at 23 is a planetary reduction gear mechanism of the first stage.
  • This planetary reduction gear mechanism 23 is constituted by a sun gear 23 B formed integrally on a shaft portion 23 A extending axially within the ring gear 17 , a plural number of planet gears 23 C meshed with the sun gear 23 B and the internal gear 17 A of the ring gear 17 and put in a revolving movement around the sun gear 23 B while spinning on the respective axes, and a carrier 23 D rotatably supporting each planet gear 23 C through a pin or the like.
  • This planetary reduction gear mechanism 24 is constituted by a sun gear 24 A splined with the carrier 23 D of the first stage, a plural number of planet gears 24 B meshed with the sun gear 24 A and the internal gear 17 A of the ring gear 17 and put in a revolving movement around the sun gear 24 A while spinning on the respective axes, and a carrier 24 C rotatably supporting each one of the planet gears 24 B through a pin or the like.
  • a planetary reduction gear mechanism of the third stage which will be the final stage.
  • This planetary reduction gear mechanism 25 is constituted by a sun gear 25 A splined with the carrier 24 C of the second stage, a plural number of planet gears 25 B meshed with the sun gear 25 A and the internal gear 17 A of the ring gear 17 , and a carrier 25 C rotatably supporting each one of the planet gears 25 B through a pin or the like.
  • the carrier 25 C is meshed with a spline 12 H formed around the outer periphery of the support member 12 at the other axial end and fixed relative to the support member 12 in the rotational direction.
  • the planetary reduction gear mechanism 25 of the third stage is arranged to transmit to the drum member 15 only the rotations of the planet gears 25 B.
  • the speed of rotation of the output shaft 14 B of the electric motor 14 is reduced by the planetary reduction gear mechanisms 23 , 24 and 25 of the respective stages of the planetary reduction gear mechanism 21 , and rotation of a reduced speed is transmitted to the ring gear 17 of the drum member 15 .
  • the drum member 15 is constituted to rotate with a large torque.
  • Indicated at 26 is a coupling shaft which is provided within the support member 12 and extends in a longitudinal direction and couples the output shaft 14 B of the electric motor 14 with the planetary reduction gear mechanism 21 .
  • the coupling shaft 26 is constituted by a coupling 27 and an input shaft 28 , which will be described later on.
  • Denoted at 27 is a tubular coupling, one axial end of which is connected to the output shaft 14 B of the electric motor 14 .
  • a male spline 27 A is provided on the outer periphery of the coupling 27 .
  • the output shaft 14 B of the electric motor 14 is splined with the inner periphery of the coupling 27 , while the male spline 27 A of the coupling 27 is meshed with a rotating disk 36 of each dry electromagnetic brakes 30 , which will be described hereinafter.
  • Denoted at 28 is an input shaft which has one axial end splined with the inner periphery of the coupling 27 .
  • the other end of this input shaft 28 is received in an axial bore 12 E which is formed in the lid portion 12 D of the support member 12 .
  • a plural number of bearings 29 are provided between the input shaft 28 and the axial bore 12 E of the support member 12 , so that the input shaft 28 is rotatably supported on the lid portion 12 D of the support member 12 through the respective bearings 29 .
  • Splined with the other axial end of the input shaft 28 is a shaft portion 23 A which is formed integrally with the sun gear 23 B of the planetary reduction gear mechanism 23 of the first stage.
  • Indicated at 30 are a couple of dry electromagnetic brakes which are provided in spaced portions in the axial direction of the support member 12 .
  • Each of these dry electromagnetic brakes 30 functions as a parking brake (negative brake) of the hydraulic excavator 1 . Namely, each of the dry electromagnetic brakes 30 apply the brakes to the output shaft 14 B when the electric motor 14 is at a rest and take off the brakes to the output shaft 14 B when the electric motor 14 is in operation.
  • each dry electromagnetic brakes 30 are mounted within a brake accommodation room 12 F which is provided in the support member 12 around the outer periphery of the coupling 27 , and constituted by a yoke member 31 , a fixed plate 33 , a rotatable disc 36 , a non-rotatable disc 37 and an electromagnetic coil 39 , which will be described hereinafter.
  • a yoke member serving as a base of the dry electromagnetic brake 30 .
  • This yoke member 31 is formed, for example, by the use of a magnetic material and in the shape of a thick disc having an axial bore 31 A at the center.
  • each one of the yoke members 31 of the respective dry electromagnetic brakes 30 is assembled into the brake accommodation room 12 F in the same direction toward the lid portion 12 D through and from the side of the opening 12 B of the support member 12 , and fixed in position by the use of a plural number of bolts 32 (only one bolt is shown in the drawing).
  • the coupling 27 of the coupling shaft 26 is placed in the axial bore 31 A in the yoke member 31 in a small gap relation with the latter.
  • the yoke member 31 is provided with an annular recess 31 B in concentric relation with the axial bore 31 A, and an electromagnetic coil 39 which will be described later on is accommodated in the recess 31 B. Further, the yoke member 31 is provided with a plural number of bottomed holes 31 C which is extended in axial direction (only one of which is shown in the drawing) to accommodate coil springs 38 , which will be described hereinafter.
  • Indicated at 33 is a fixed plate in the form of a circular hollow disc, which is provided fixedly on the yoke member 31 .
  • the coupling 27 is passed through the fixed plate 33 on the inner peripheral side of the latter.
  • the fixed plate 33 is securely fixed to the yoke member 31 by the use of a plural number of bolts 34 and cylindrical guides 35 (only one of which is shown in the drawing) at a number of radially spaced positions.
  • the fixed plate 33 is fixed to the yoke member 31 by the bolts 34 having fore end portions threaded into the yoke member 31 through the guides 35 .
  • Indicated at 36 is a rotatable disc which is meshed with the male spline 27 A of the coupling 27 and located between the yoke member 31 and the fixed plate 33 .
  • the rotatable disc 36 is in the form of a hollow circular disc and provided with a female spline 36 A on the inner peripheral side.
  • the rotatable disk 36 rotates with the coupling 27 by meshing the female spring 36 A with the male spline 27 A of the coupling 27 .
  • Designated at 37 is a non-rotatable disc which is mounted displaceably in the axial direction of the coupling 27 between the yoke member 31 and the fixed plate 33 .
  • This non-rotatable disc 37 is formed in the shape of a hollow circular disc, and the coupling 27 is passed through the inner peripheral side of the non-rotatable disc 37 .
  • the non-rotatable disc 37 functions to grip the rotatable disc 36 in cooperation with the fixed plate 33 . In this instance, the non-rotatable disc 37 is locked in a non-rotatable state relative to the coupling 27 by the guides 35 which are passed through outer peripheral portions of the non-rotatable disc 37 , but allowed to move in the axial direction of the coupling 27 along the guides 35 .
  • Indicated at 38 are coil springs which are set in a plural number of bottomed holes 31 C (only one of which is shown in the drawings) which are bored into the yoke member 31 , thereby to constantly press the non-rotatable disc 37 toward the fixed plate 33 .
  • the non-rotatable disc 37 is pressed against and held in frictional engagement with the rotatable disc 36 by the forces of the coil springs 38 as shown in FIG. 5 to restrict rotation of the rotatable disc 36 .
  • the brakes are applied to the output shaft 14 B of the electric motor 14 which is coupled with the rotatable disc 36 through the coupling 27 .
  • Indicated at 39 is an electromagnetic coil which is accommodated in the recess 31 B of the yoke member 31 .
  • This electromagnetic coil 39 is supplied with power, for example, simultaneously with the electric motor 14 , and thereby excited to magnetically attract the non-rotatable disc 37 .
  • the non-rotatable disc 37 is moved away from the rotatable disc 36 against the forces of the coil springs 38 , bringing the non-rotatable disc 37 out of frictional engagement with the rotatable disc 36 to put the brakes off the output shaft 14 B of the electric motor 14 .
  • Indicated at 40 is a space which is provided within the brake accommodation room 12 F of the support member 12 .
  • This space 40 is provided between the two dry electromagnetic brakes 30 which are located in axially spaced positions. Heat which is generated by excitation of the electromagnetic coils 39 of the each dry electromagnetic brakes 30 is released to this space 40 .
  • both of the electric motor 14 and the planetary reduction gear mechanism 21 can be located within the width S of the crawler belt 6 (belt width) in the transverse direction.
  • a connector which is mounted in a connector accommodation room 12 G within the support member 12 .
  • This connector 41 is composed of a connector member 41 A on the side of the brakes and a connector member 41 B on the side of the power supply.
  • the connector member 41 A on the side of the brakes is provided at the distal end of an internal wiring 42 which is connected to the electromagnetic coil 39
  • the connector member 41 B on the side of the power supply is provided at the distal end of an external wiring 43 which is connected to a power source (not shown).
  • the connector accommodation room 12 G of the support member 12 is provided upward of the dry electromagnetic brakes 30 , so that the connector 41 which is mounted in the connector accommodation room 12 G can be kept out of contact with rain water even in the event rain water gets into the support member 12 through an interstice between the electric motor 14 and the support member 12 .
  • Indicated at 44 is a floating seal adopted as a first liquid tight seal member to provide a liquid tight seal between the opening 16 A of the tubular body 16 of the drum member 15 and the support member 12 .
  • the floating seal 44 is of an annular shape and placed fully around the opening 16 A and the support member 12 .
  • the floating seal 44 forms as a liquid tight seal between the fixed support member 12 and rotating drum member 15 , sealing up the lubricant oil 22 of the bearings 19 and the planetary reduction gear mechanism 21 within the drum member 15 .
  • Indicated at 45 is a seal ring of U-shape in section adopted as a second seal member for providing a liquid tight seal between the lid portion 12 D of the support member 12 and the coupling shaft 26 .
  • This seal ring 45 is located between the axial bore 12 E in the lid portion 12 D and the input shaft 28 of the coupling shaft 26 .
  • the seal ring 45 seal between the axial bore 12 E and the input shaft 28 , preventing the lubricant oil 22 in the drum member 15 from flowing into the brake accommodation room 12 F within the support member 12 .
  • the vehicle drive unit 11 of the hydraulic excavator 1 gives the following performances in operation.
  • the electromagnetic coil 39 of each dry electromagnetic brakes 30 is also in a de-energized state with no power supply.
  • the non-rotatable disc 37 is pressed toward and urged into frictional engagement with the rotatable disc 36 by the coil springs 38 , so that the rotatable disc 36 is gripped between the fixed plate 33 and the non-rotatable disc 37 .
  • the rotatable disc 36 is restricted of rotation, applying the brakes to the output shaft 14 B of the electric motor 14 which is connected to the rotatable disc 36 through the coupling 27 , to function as a parking brake (a negative brake) of the hydraulic excavator 1 .
  • the two dry electromagnetic brakes 30 can be accommodated within the support member 12 in a shielded state from the inflammable lubricant oil 22 held in the drum member 15 .
  • the dry electromagnetic brakes 30 can be used for applying the brakes to the coupling shaft 26 when the electric motor 14 is at rest and take the brakes off the coupling shaft 26 when the electric motor 14 is in rotation.
  • each one of the dry electromagnetic brakes 30 can be accommodated in a compact form within the support member 12 which is assembled with the electric motor 14 and the planetary reduction gear mechanism 21 , permitting to downsize the vehicle drive unit 11 incorporating the dry electromagnetic brakes 30 .
  • the electric motor 14 and the planetary reduction gear mechanism 21 can be located within the width S of the crawler belt 6 (belt width) in the transverse direction, preventing the electric motor 14 or the planetary reduction gear mechanism 21 from projecting on the outer side of the crawler belt 6 . Therefore, when the hydraulic excavator 1 is traveling on a rough unlevel terrain, for example, the electric motor 14 and planetary reduction gear mechanism 21 can be protected from rocks or other obstacles to ensure higher reliability of the vehicle drive unit 11 .
  • the use of the electric motor 14 in the vehicle drive unit 11 obviates an engine which has thus far been used in a hydraulic motor type vehicle drive unit for driving a hydraulic pump which supplies pressure to a hydraulic motor. That is to say, obviation of an engine means suppression of exhaust gases and noises which are issued from an engine when the hydraulic excavator 1 is in travel, and thus can contribute to improvements of working environment to a significant degree.
  • a couple of dry electromagnetic brakes 30 are mounted in axially spaced positions within a brake accommodation room 12 F within the support member 12 . Therefore, when the electric motor 14 is at rest, a large braking force can be applied to the output shaft 14 B by the two dry electromagnetic brakes 30 , permitting to stop (park) the hydraulic excavator 1 securely.
  • a free space 40 is provided between the two dry electromagnetic brakes 30 , so that heat which is generated as a result of excitation of the electromagnetic coils 39 of the two dry electromagnetic brakes 30 can be released into the space 40 efficiently. This contributes to enhance the durability of the dry electromagnetic brakes 30 and the reliability of the vehicle drive unit 11 .
  • the two dry electromagnetic brakes 30 are each fixed in the support member 12 . That is to say, the two dry electromagnetic brakes 30 can be assembled into the support member 12 prior to assembling the electric motor 14 with the support member 12 . This permits to perform an assembling work in an efficient manner.
  • each one of the two dry electromagnetic brakes 30 is assembled into the brake accommodation room 12 F within the support member 12 in the same direction toward the lid portion 12 D through the opening 12 B and fixed in position by the use of a plural number of bolts 32 . That is to say, the two dry electromagnetic brakes 30 can be assembled commonly from the same direction relative to the support member 12 and in an efficient manner.
  • the coupling shaft 26 which couples the output shaft 14 B of the electric motor 14 with the planetary reduction gear mechanism 21 is constituted by the coupling 27 and the input shaft 28 . Therefore, for example, after coupling the input shaft 28 with the planetary reduction gear mechanism 21 , the output shaft 14 B of the electric motor 14 can be coupled with the input shaft 28 easily by the coupling 27 in an efficient manner.
  • the connector accommodation room 12 G is provided within the support member 12 , at a position upward of the dry electromagnetic brakes 30 , to accommodate the connector 41 connecting the power supply external wring 43 with the internal wiring 42 which is connected to the electromagnetic coils 39 of the dry electromagnetic brakes 30 . Therefore, even if rain water flow into the support member 12 through an interstice between the support member 12 and the electric motor 14 , the connector 41 can be kept out of contact with rain water, to enhance operational reliability of the dry electromagnetic brakes 30 .
  • FIG. 7 there is shown a second embodiment of the present invention.
  • This embodiment has a feature in that one of the two electromagnetic brakes which are provided internally of the support member is fixed to the support member, while the other one of the electromagnetic brakes is fixed to the electric motor.
  • those component parts which are identical with the counterparts in the foregoing first embodiment are simply designated by the same reference numerals and characters to avoid repetitions of same explanations.
  • the vehicle drive unit 51 is a vehicle drive unit incorporating a drum rotating apparatus of the present embodiment.
  • the vehicle drive unit 51 is constituted by a support member 12 , an electric motor 14 , a drum member 15 , a planetary reduction gear mechanism 21 and a couple of dry electromagnetic brakes 30 and 52 .
  • this embodiment differs from the first embodiment in that one dry electromagnetic brake 30 is fixed to the support member 12 , while the other dry electromagnetic brake 52 is fixed to a motor casing 14 A of the electric motor 14 .
  • the dry electromagnetic brake 52 is a dry electromagnetic brake which is provided within a brake accommodation room 12 F of the support member 12 together with another dry electromagnetic brake 30 .
  • the dry electromagnetic brake 52 is constituted by a yoke member 31 , a fixed plate 33 , guides 35 , a rotatable disc 36 , a non-rotatable disc 37 , coil springs 38 and an electromagnetic coil 39 .
  • the dry electromagnetic brake 52 is fixedly mounted within the support member 12 by the use of a plural number of bolts 53 (only one bolt is shown in the drawing) which are passed through the fixed plate 33 , guides 35 and the yoke member 31 and threaded into the motor casing 14 A of the electric motor 14 .
  • the vehicle drive unit 51 of the present embodiment practically has no difference in particular from the above-described performances of the foregoing first embodiment in performance.
  • one dry electromagnetic brake 30 is fixed to the support member 12 while the other dry electromagnetic brake 52 is fixed to the motor casing 14 A of the electric motor 14 , providing a broad free space 54 between the two dry electromagnetic brakes 30 and 52 to accelerate release of heat from the two dry electromagnetic brakes 30 and 52 all the more.
  • FIG. 8 there is shown a third embodiment of the present invention.
  • This third embodiment has a feature in that a coupling shaft which couples an output shaft of an electric motor with a reducer is constituted by one and single member.
  • those component parts which are identical with the counterparts in the foregoing first embodiment are simply designated by the same reference numerals and characters to avoid repetitions of same explanations.
  • a coupling shaft which is axially extended in and through a support member 12 .
  • This coupling shaft 61 is adapted to couple an output shaft 14 B of an electric motor 14 with a planetary reduction gear mechanism 21 .
  • the coupling shaft 61 is constituted by a single shaft member which has one axial end thereof formed as a coupling portion 61 A, and the other axial end as an input shaft portion 61 B.
  • the coupling portion 61 A is connected with the output shaft 14 B of the electric motor 14 , and provided with a spline 61 C on its circumferential surface for meshing engagement with rotatable discs 36 of the dry electromagnetic brakes 30 .
  • the input shaft portion 61 B is splined with a shaft portion 23 A on the side of a planetary gear mechanism of the first stage, and rotatably supported in a lid portion 12 D of the support member 12 through bearings 29 .
  • the present invention has been described by way of an application using a planetary reduction gear mechanism with three reduction stages.
  • the present invention is not limited to such a planetary reduction gear mechanism, and can be similarly applied to a single stage planetary reduction gear mechanism or to a planetary reduction gear mechanism with two or more than four reduction stages.
  • the vehicle drive unit 11 of the hydraulic excavator 1 has been shown as an example of application of the drum rotating apparatus of the invention.
  • the present invention is similarly applicable to other drum rotating apparatus, for example, to rope winches which are mounted on hydraulic cranes.
  • the drum member is in the form of a take-up drum which is adapted to take up a rope on and around its outer periphery.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Electromagnetism (AREA)
  • Power Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Braking Arrangements (AREA)
  • Retarders (AREA)
  • General Details Of Gearings (AREA)
US11/910,808 2005-08-01 2006-07-28 Drum rotating apparatus for use on construction machines Abandoned US20090078528A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2005-223163 2005-08-01
JP2005223163 2005-08-01
PCT/JP2006/315442 WO2007015554A1 (fr) 2005-08-01 2006-07-28 Dispositif de rotation de tambour pour engin de chantier

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US20090078528A1 true US20090078528A1 (en) 2009-03-26

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US11/910,808 Abandoned US20090078528A1 (en) 2005-08-01 2006-07-28 Drum rotating apparatus for use on construction machines

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US (1) US20090078528A1 (fr)
EP (1) EP1914154B1 (fr)
JP (1) JP4527778B2 (fr)
KR (1) KR101280667B1 (fr)
CN (1) CN100558592C (fr)
DE (1) DE602006019738D1 (fr)
WO (1) WO2007015554A1 (fr)

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CN103016631A (zh) * 2011-09-20 2013-04-03 赣州五环机器有限责任公司 一种回转行星减速机
CN104534094A (zh) * 2014-12-22 2015-04-22 武汉船用机械有限责任公司 一种盾构机注浆罐搅拌轴轴端密封装置
US20150203159A1 (en) * 2012-09-12 2015-07-23 Shiro Tamura Suspension structure for in-wheel motor drive device
US20180262085A1 (en) * 2017-03-13 2018-09-13 Sumitomo Heavy Industries, Ltd. Drive device
US10099550B2 (en) 2014-07-03 2018-10-16 Komatsu Ltd. Power Transmission Device
US10207580B2 (en) * 2016-12-09 2019-02-19 Deere & Company Work vehicle drive with compact multi-speed shift assembly
US10247294B2 (en) * 2016-03-31 2019-04-02 Schaeffler Technologies AG & Co. KG Drive unit with an electromotive power unit and a transmission
US10451155B2 (en) * 2016-02-12 2019-10-22 Stephen John Kochan Non-backdrivable self-locking gear system
US20200391716A1 (en) * 2019-06-11 2020-12-17 Dana Motion Systems Italia S.R.L. Traction assembly, particularly for terrestrial traction machines and the like
EP3630519A4 (fr) * 2017-05-31 2021-03-10 BAE Systems Hägglunds Aktiebolag Véhicule à chenilles ayant un moteur disposé de manière coaxiale avec une roue d'entraînement
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WO2021219200A1 (fr) * 2020-04-28 2021-11-04 Rethink Robotics Gmbh Dispositif d'entraînement pour articulation robitque
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WO2023117273A1 (fr) * 2021-12-22 2023-06-29 Bernward Welschof Entraînement de moyeu de roue, en particulier entraînement à barbotin

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FR2997063B1 (fr) * 2012-10-18 2014-10-31 Thales Sa Dispositif pour enrouler et derouler un cable autour d'un tambour
SE538232C2 (sv) 2013-05-08 2016-04-12 BAE Systems Hägglunds Aktiebolag Drivenhet för bandgående fordon och fordon försett med drivenhet
DE102013213393A1 (de) 2013-07-09 2015-01-15 Robert Bosch Gmbh Radnabenantrieb mit einer verbesserten Abdichtung eines Getriebegehäuses
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JP6223206B2 (ja) * 2014-01-27 2017-11-01 住友重機械工業株式会社 自然環境下に設置される設備の車輪駆動装置
CN104358804B (zh) * 2014-10-29 2017-03-01 李开卫 多片湿式盘式制动器及其运行方法
JP2019132066A (ja) * 2018-01-31 2019-08-08 株式会社小松製作所 回転駆動システム及び油圧ショベル
KR101960633B1 (ko) * 2018-03-09 2019-03-20 엘지전자 주식회사 전자식 브레이크 일체형 인휠모터 구동장치
CN109109650A (zh) * 2018-09-28 2019-01-01 武汉轻工大学 防泥水的轮辋驱动装置及汽车
CH716390A2 (de) 2019-07-04 2021-01-15 I&W Eng Ag Lamellenbremse für einen Fahrzeugantrieb und ein Fahrzeugantrieb.
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US8133143B2 (en) 2008-06-16 2012-03-13 Fairfield Manufacturing Company, Inc. Gear reducer electric motor assembly with internal brake
US20090312134A1 (en) * 2008-06-16 2009-12-17 Benjamin Warren Schoon Gear reducer electric motor assembly with internal brake
US8863885B2 (en) * 2009-10-02 2014-10-21 Volvo Lastvagnar Ab Wheel hub unit
US20120187747A1 (en) * 2009-10-02 2012-07-26 Volvo Lastvagnar Ab Wheel hub unit
CN103016631A (zh) * 2011-09-20 2013-04-03 赣州五环机器有限责任公司 一种回转行星减速机
CN102628515A (zh) * 2012-04-26 2012-08-08 大连华锐重工集团股份有限公司 盾构设备用砂浆箱搅拌轴密封装置
US20150203159A1 (en) * 2012-09-12 2015-07-23 Shiro Tamura Suspension structure for in-wheel motor drive device
US9771105B2 (en) * 2012-09-12 2017-09-26 Ntn Corporation Suspension structure for in-wheel motor drive device
US10099550B2 (en) 2014-07-03 2018-10-16 Komatsu Ltd. Power Transmission Device
CN104534094A (zh) * 2014-12-22 2015-04-22 武汉船用机械有限责任公司 一种盾构机注浆罐搅拌轴轴端密封装置
US10451155B2 (en) * 2016-02-12 2019-10-22 Stephen John Kochan Non-backdrivable self-locking gear system
US10247294B2 (en) * 2016-03-31 2019-04-02 Schaeffler Technologies AG & Co. KG Drive unit with an electromotive power unit and a transmission
US10207580B2 (en) * 2016-12-09 2019-02-19 Deere & Company Work vehicle drive with compact multi-speed shift assembly
US10622867B2 (en) * 2017-03-13 2020-04-14 Sumitomo Heavy Industries, Ltd. Drive device
US20180262085A1 (en) * 2017-03-13 2018-09-13 Sumitomo Heavy Industries, Ltd. Drive device
US11319004B2 (en) 2017-03-16 2022-05-03 BAE Systems Hägglunds Aktiebolag Tracked vehicle
US11377161B2 (en) 2017-05-31 2022-07-05 BAE Systems Hägglunds Aktiebolag Tracked vehicle having motor coaxially arranged with drive wheel
EP3630519A4 (fr) * 2017-05-31 2021-03-10 BAE Systems Hägglunds Aktiebolag Véhicule à chenilles ayant un moteur disposé de manière coaxiale avec une roue d'entraînement
US20210122434A1 (en) * 2019-02-19 2021-04-29 Hitachi Construction Machinery Co., Ltd. Tracked vehicle
US12030564B2 (en) * 2019-02-19 2024-07-09 Hitachi Construction Machinery Co., Ltd. Tracked vehicle
US20200391716A1 (en) * 2019-06-11 2020-12-17 Dana Motion Systems Italia S.R.L. Traction assembly, particularly for terrestrial traction machines and the like
US11718282B2 (en) * 2019-06-11 2023-08-08 Dana Motion Systems Italia S.R.L. Traction assembly, particularly for terrestrial traction machines and the like
WO2021219200A1 (fr) * 2020-04-28 2021-11-04 Rethink Robotics Gmbh Dispositif d'entraînement pour articulation robitque
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JP4527778B2 (ja) 2010-08-18
CN101175663A (zh) 2008-05-07
KR101280667B1 (ko) 2013-07-01
DE602006019738D1 (de) 2011-03-03
CN100558592C (zh) 2009-11-11
JPWO2007015554A1 (ja) 2009-02-19
EP1914154A4 (fr) 2009-01-14
WO2007015554A1 (fr) 2007-02-08
KR20080034090A (ko) 2008-04-18
EP1914154A1 (fr) 2008-04-23
EP1914154B1 (fr) 2011-01-19

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