WO2015129380A1 - In-wheel motor drive device - Google Patents

In-wheel motor drive device Download PDF

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Publication number
WO2015129380A1
WO2015129380A1 PCT/JP2015/052488 JP2015052488W WO2015129380A1 WO 2015129380 A1 WO2015129380 A1 WO 2015129380A1 JP 2015052488 W JP2015052488 W JP 2015052488W WO 2015129380 A1 WO2015129380 A1 WO 2015129380A1
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WO
WIPO (PCT)
Prior art keywords
drive device
wheel motor
motor drive
air chamber
partition wall
Prior art date
Application number
PCT/JP2015/052488
Other languages
French (fr)
Japanese (ja)
Inventor
四郎 田村
貴則 石川
Original Assignee
Ntn株式会社
四郎 田村
貴則 石川
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 Ntn株式会社, 四郎 田村, 貴則 石川 filed Critical Ntn株式会社
Publication of WO2015129380A1 publication Critical patent/WO2015129380A1/en

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    • 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
    • B60L15/00—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles
    • B60L15/20—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed
    • B60L15/2009—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed for braking
    • 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
    • B60L15/00—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles
    • B60L15/20—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed
    • B60L15/2054—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed by controlling transmissions or clutches
    • 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
    • B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
    • B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
    • B60L3/0061—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to electrical machines
    • 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
    • B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
    • B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
    • B60L3/0069—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to the isolation, e.g. ground fault or leak current
    • 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
    • B60L50/00—Electric propulsion with power supplied within the vehicle
    • B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
    • B60L50/51—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells characterised by AC-motors
    • 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
    • H02K5/22—Auxiliary parts of casings not covered by groups H02K5/06-H02K5/20, e.g. shaped to form connection boxes or terminal boxes
    • H02K5/225—Terminal boxes or connection arrangements
    • 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
    • H02K7/14—Structural association with mechanical loads, e.g. with hand-held machine tools or fans
    • 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
    • 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
    • B60L2220/10—Electrical machine types
    • B60L2220/14—Synchronous machines
    • 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
    • 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
    • B60L2240/00—Control parameters of input or output; Target parameters
    • B60L2240/10—Vehicle control parameters
    • B60L2240/36—Temperature of vehicle components or parts
    • 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
    • B60L2240/00—Control parameters of input or output; Target parameters
    • B60L2240/40—Drive Train control parameters
    • B60L2240/42—Drive Train control parameters related to electric machines
    • B60L2240/421—Speed
    • 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
    • B60L2240/00—Control parameters of input or output; Target parameters
    • B60L2240/60—Navigation input
    • B60L2240/66—Ambient conditions
    • B60L2240/667—Precipitation
    • 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
    • B60L2270/00—Problem solutions or means not otherwise provided for
    • B60L2270/10—Emission reduction
    • B60L2270/14—Emission reduction of noise
    • B60L2270/145—Structure borne vibrations
    • 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
    • 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
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries
    • 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
    • Y02T10/72—Electric energy management in electromobility
    • 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
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/16—Information or communication technologies improving the operation of electric vehicles

Definitions

  • the present invention relates to an in-wheel motor drive device for driving a wheel, and more particularly to an internal structure of a terminal box for drawing a power line, a signal cable, etc.
  • the in-wheel motor drive device is not only less burdensome on the environment because it is electrically driven, but also installed in the wheel of an automobile to drive the wheel, so that it has a larger cabin than an engine automobile. Space can be secured, which is advantageous.
  • a power line for supplying electric power to the in-wheel motor drive device The present applicant has already proposed Patent Document 1 as a connection structure between an in-wheel motor drive device and a power line.
  • a terminal box is attached to the casing of the in-wheel motor drive device, and three power lines are connected to the terminal box.
  • the in-wheel motor drive device Since the in-wheel motor drive device is disposed in the space area in the road wheel of the wheel that contacts the road surface and drives the wheel, various vibrations and forces are input to the in-wheel motor drive device from the road surface side. Further, since the in-wheel motor driving device is attached to the vehicle body via the suspension device, various vibrations and forces are also input to the in-wheel motor driving device from the vehicle body side. Furthermore, since the in-wheel motor drive device is disposed near the road surface, foreign matters such as sand and muddy water fly.
  • the present invention has been made in view of the above-mentioned circumstances, and an object thereof is to improve the sealing performance at the connection point between the in-wheel motor drive device and the power line.
  • an in-wheel motor drive device includes an interior of an in-wheel motor drive device lubricated by lubricating oil, an air chamber into which a front end of a power line extending from the outside of the in-wheel motor drive device is inserted, A non-conductive partition wall that partitions the inside of the wheel motor drive device and the air chamber, and a conductor extending across the partition wall, one end of which is disposed inside the in-wheel motor drive device and connected to the motor coil, The other end is disposed in the air chamber and includes a conductive member connected to the tip of the power line.
  • the tip of the power line extending from the outside to the in-wheel motor drive device is inserted into the air chamber of the in-wheel motor drive device, the tip of the power line can be protected from foreign matter. Further, since the air chamber and the inside of the in-wheel motor drive device are partitioned by the partition wall, it is possible to prevent the lubricating oil from leaching from the inside of the in-wheel motor drive device to the air chamber along the conductive member. Therefore, the connection location between the in-wheel motor drive device and the power line can be double-sealed by the partition wall and the wall defining the air chamber, and the interior of the in-wheel motor drive device can be formed by the partition wall at the connection location. It is possible to improve the sealing performance.
  • the inside of the in-wheel motor drive device is, for example, a motor chamber that houses a rotor and a stator of a motor, a reduction chamber that houses a gear set of a speed reduction mechanism, or a gear set of a motor rotor and a speed reduction mechanism. Or a large chamber that accommodates the rotation sensor or other mechanical elements.
  • the shape of the conductive member is not particularly limited.
  • the conductive member may be, for example, a straight or bent round bar or square bar, or a long plate with both ends bent. Further, since the power line supplies a large current to the motor of the in-wheel motor driving device, a larger current flows than the signal cable, and therefore, the power line is covered with a nonconductive material such as a vinyl chloride resin.
  • the interior of the in-wheel motor drive device and the air chamber are respectively defined by the casing of the in-wheel motor drive device, and the conductive member is formed in the casing to connect the interior of the in-wheel motor drive device and the air chamber.
  • the non-conductive partition wall is a resin filled in a gap between the inner peripheral surface of the passage and the outer peripheral surface of the conductive member. According to this embodiment, since the gap between the inner peripheral surface of the hole and the outer peripheral surface of the conductive member is filled with the resin, the sealing function of the partition wall can be ensured.
  • the partition wall may be a pre-formed component, and may be interposed between the inner peripheral surface of the hole and the outer peripheral surface of the conductive member.
  • annular sealing material that surrounds the outer peripheral surface of the conductive member and is embedded in the partition wall is further provided.
  • the annular sealing material is interposed between the outer peripheral surface of the conductive member and the partition wall, so that the sealing performance of the partition wall is increased. Can be further ensured. Therefore, the durability of the sealing function is improved and deterioration over time can be prevented.
  • a second air chamber into which a tip of a signal line extending from the outside of the in-wheel motor drive device is inserted, and a non-conductive property that partitions the second air chamber from the inside of the in-wheel motor drive device A second partition wall and a conductor extending across the second partition wall, one end of which is disposed inside the in-wheel motor drive device and connected to the sensor, and the other end is disposed in the second air chamber. And a second conductive member connected to the tip of the signal line.
  • the lubricating oil oozes out from the inside of the in-wheel motor drive device to the second air chamber along the second conductive member. Can be prevented. Accordingly, the connection portion between the in-wheel motor drive device and the signal line can be double-sealed by the partition wall and the wall defining the air chamber, and the inside of the in-wheel motor drive device can be sealed by the second partition wall. The property can be further improved.
  • connection portion between the in-wheel motor driving device and the power line can be protected from foreign matter by the wall defining the air chamber, and further, the inside of the in-wheel motor driving device is defined.
  • the walls can protect against in-wheel motor drive lubricant.
  • the inside of the in-wheel motor drive device is basically secured by the casing. However, since a part of the casing is perforated and a tip of the power line is inserted, the sealing performance is provided at the part. There is a risk of becoming vulnerable. ADVANTAGE OF THE INVENTION According to this invention, the inside of an in-wheel motor drive device can be protected from a foreign material by the wall which defines an air chamber, and the wall which defines the inside of an in-wheel motor drive device. Moreover, the sealing performance inside the in-wheel motor drive device can be ensured by the partition wall. Furthermore, the partition wall is also protected from foreign matter by the wall defining the air chamber.
  • the in-wheel motor drive device Since the in-wheel motor drive device is close to the road surface, foreign matters such as water, mud, sand, and dust frequently fly.
  • the provision of the present invention improves the sealing performance of the connection part of the power line than before. , Durability is improved.
  • FIG. 1 is an explanatory view showing an in-wheel motor drive device according to an embodiment of the present invention, as viewed from the inner side in the vehicle width direction.
  • FIG. 2 is a schematic longitudinal sectional view showing a basic configuration of the embodiment.
  • FIG. 3 is an explanatory view showing the same embodiment in a cross section different from that in FIG. 2, and shows a cross sectional view of the terminal box and the motor unit.
  • FIG. 4 is a cross-sectional view of the terminal box, which is a cross-sectional view taken along the line IV-IV in FIG. 3 and viewed in the direction of the arrow.
  • FIG. 1 is an explanatory view showing an in-wheel motor drive device according to an embodiment of the present invention, as viewed from the inner side in the vehicle width direction.
  • FIG. 2 is a schematic longitudinal sectional view showing a basic configuration of the embodiment.
  • FIG. 3 is an explanatory view showing the same embodiment in a cross section different from that in FIG. 2, and shows a cross sectional view of the
  • the in-wheel motor drive device 11 has a substantially cylindrical shape, and includes a motor unit 11A, a reduction unit 11B, and a hub unit 11C that are sequentially arranged in series and coaxially in the axis O direction of the in-wheel motor drive device 11.
  • the speed reduction part 11B adjacent to the hub part 11C is made larger in diameter than the hub part 11C.
  • the motor part 11A adjacent to the speed reducing part 11B has a larger diameter than the speed reducing part 11B.
  • the casing 21b that forms the outline of the motor unit 11A and the speed reduction unit 11B is a non-rotating fixed member.
  • the hub portion 11C has a rotating member on the inner ring side and a fixing member on the outer ring side, and a wheel 111 is attached and fixed to the rotating member (hub wheel 77), and the rotational driving force of the motor portion 11A is supplied to the wheel.
  • the wheel 111 is rotated and supported.
  • the in-wheel motor drive device 11 is provided in the inner space S of the road wheel 112 of the wheel 111 as shown in FIG.
  • the inner space region S is a circular space surrounded by the rim portion of the road wheel 112, and the entire hub portion 11C, the entire speed reduction portion 11B, and a part of the motor portion 11A are located in the inner space region S.
  • the end surface side portion of the motor unit 11A is located outside the inner space region S.
  • the trailing arm 113 of the suspension device extends in the vehicle front-rear direction, and the trailing end of the trailing arm 113 extends to the inner space region S to the outer side in the vehicle width direction and is coupled to the casing 21b.
  • the motor unit 11A houses a rotor 12, a stator 13, and a motor shaft 14a of a rotating electrical machine in a motor chamber L in casings 21a and 21b.
  • the motor unit 11A rotationally drives the hub unit 11C through the speed reduction unit 11B, or performs power regeneration using the rotation of the hub unit 11C (wheel 111) during braking or the like.
  • the casing 21a is a disk-like member that closes the end of the motor unit 11A.
  • the casing 21b is a cylindrical member that is open at both ends. One end of the casing 21b is closed by the casing 21a, and the stator 13 is attached and fixed to the inner peripheral surface at one end in the axial direction at a predetermined interval in the circumferential direction.
  • the rotor 12 is disposed on the inner diameter side of the stator 13, and the rotor 12 is attached and fixed to a motor shaft 14 a extending along the axis O.
  • the casing 21b defines a deceleration chamber N at the other end in the axial direction, and the deceleration mechanism of the deceleration unit 11B is accommodated in the deceleration chamber N.
  • This speed reduction mechanism is a cycloid speed reduction mechanism, and includes an input shaft 14b, a pair of eccentric members 71, two rolling bearings 72, two corrugated curved plates 73, an inner pin 74, and an outer pin 75. And an output shaft 76.
  • the input shaft 14b of the deceleration unit 11B is connected and fixed to the motor shaft 14a of the motor unit 11A.
  • the eccentric member 71 is eccentrically provided on the input shaft 14b.
  • the two curved plates 73 have a central hole, and the inner peripheral surface of the central hole is rotatably supported on the outer peripheral surface of the eccentric member 71 via the rolling bearing 72.
  • the outer pin 75 is fixed to the outer pin housing 79 elastically supported by the casing 21b, engages with the outer peripheral portion formed in the waveform of the curved plate 73, and rotates the curved plate 73 revolving around the axis O.
  • the inner pin 74 is attached and fixed to the output shaft 76, extracts only the rotational movement of the curved plate 73, and transmits it to the output shaft 76.
  • the rotation of the input shaft 14b is decelerated by the deceleration unit 11B and output from the output shaft 76.
  • the hub wheel 77 is connected and fixed to the output shaft 76.
  • the hub wheel 77 is rotatably supported by the casing 21b via a rolling bearing 78.
  • a road wheel 112 is fixedly attached to the hub wheel 77.
  • the in-wheel motor drive device 11 is provided with a lubricating oil circuit of an axial oil supply system, and lubricates the motor part 11A and the reduction part 11B.
  • a lubricating oil tank 53 is attached to the lower part of the casing 21b.
  • a lubricating oil pump 51 is provided in a partition wall 21e of the casing that serves as a boundary between the motor chamber L that houses the motor unit 11A and the deceleration chamber N that houses the deceleration unit 11B.
  • the lubricating oil pump 51 is arranged coaxially with the axis O and is driven by an inner pin reinforcing member 74 b fixed to the inner pin 74.
  • a suction oil passage 52 formed in the wall of the partition wall 21e extends in the vertical direction, and an upper end thereof is connected to the suction port of the lubricant pump 51, and a lower end thereof is provided in the lower portion of the speed reduction unit 11B. 53.
  • the discharge oil passage 54 formed in the wall of the partition wall 21e extends in the vertical direction, is connected to the discharge port of the lubricating oil pump 51 at the lower end, and is one end of the casing oil passage 55 formed in the casing 21b at the upper end. Connect with.
  • the casing oil passage 55 is formed inside the wall of the casing 21b which becomes a hollow cylindrical wall, and extends in the axial direction. An end of the casing oil passage 55 on the casing 21a side is connected to an outer diameter side end of the communication oil passage 56.
  • the communication oil passage 56 is formed inside the wall of the casing 21a which becomes a disk-shaped wall. Extend in the direction. The inner diameter side end of the communication oil passage 56 is connected to a motor shaft oil passage 58a provided in the motor shaft 14a.
  • the motor shaft oil passage 58a is provided inside the motor shaft 14a and extends along the axis O. Then, one end of the motor shaft oil passage 58a closer to the speed reduction portion 11B is connected to a speed reduction portion input shaft oil passage 58b provided on the input shaft 14b and extending along the axis O. Further, one end of the motor shaft oil passage 58a on the side far from the speed reduction portion 11B is connected to the communication oil passage 56 described above. Further, the motor shaft oil passage 58a is connected to the inner diameter side end of the rotor oil passage 64 formed in the rotor flange portion in the middle in the axial direction.
  • the speed reducer input shaft oil passage 58b is provided inside the input shaft 14b and extends along the axis O between both ends of the input shaft 14b.
  • a lubricating oil hole 60 is provided at one end facing the output shaft 76. The lubricating oil hole 60 injects lubricating oil toward the deceleration chamber N.
  • the speed reducer input shaft oil passage 58b branches into a lubricating oil passage 59 extending radially outward in the eccentric member 71.
  • the outer diameter side end of the lubricating oil passage 59 is connected to a rolling bearing 72 provided between the outer peripheral surface of the eccentric member 71 and the inner peripheral surface of the curved plate 73.
  • a deceleration unit return hole 61 is provided at the bottom of the deceleration chamber N.
  • the speed reduction part return hole 61 passes through the casing 21 b and connects the speed reduction chamber N and the lubricating oil tank 53.
  • a motor part return hole 66 is provided at the bottom of the motor chamber L. The motor part return hole 66 penetrates the partition wall 21 e and communicates the motor chamber L and the lubricating oil tank 53.
  • the operation of the lubricating oil circuit will be described.
  • the lubricating oil pump 51 driven by the output shaft 76 via the inner pin reinforcing member 74b is connected to the lubricating oil via the suction oil passage 52 as indicated by a white arrow in FIG.
  • the lubricating oil stored in the tank 53 is sucked and the lubricating oil is discharged to the discharge oil passage 54.
  • the lubricating oil is pressurized by the lubricating oil pump 51 and flows sequentially from the discharge oil passage 54 to the casing oil passage 55, the communication oil passage 56, and the motor shaft oil passage 58a.
  • the lubricating oil goes to the bottom of the deceleration chamber N and returns to the lubricating oil tank 53 through the deceleration unit return hole 61. In this way, the speed reducing portion 11B is lubricated by the axial center oil supply system.
  • the deceleration chamber N is filled with the injected lubricating oil.
  • a terminal box 22 for drawing three power lines 101 extending from the inverter 121 into the motor unit 11A is provided on the outer periphery of the motor unit 11A.
  • the terminal box 22 is provided so as to be positioned inside the vehicle body of the trailing arm 113 attached to the casing of the speed reducing portion 11B.
  • the three power lines 101 are supported on the inner surface in the vehicle width direction of the trailing arm 113 and extend forward from the terminal box 22 along the trailing arm 113 to the front of the vehicle.
  • the signal line 105 of the rotation angle sensor 49 that detects the rotation angle of the motor extends from the terminal box 22 along the trailing arm 113 to the front of the vehicle. As shown in FIG.
  • the terminal box 22 is provided across the three through holes 23 extending in the direction perpendicular to the axis O and the three through holes 23, and the power line 101 inserted into the through hole 23.
  • This is a box that includes one bracket 24 that supports and fixes the same in common and a plate-like cover 25 that closes one side of the terminal box 22.
  • the terminal box 22 is attached and fixed to the casings 21a and 21b.
  • the terminal box 22 can be considered part of the casing. Therefore, as a modification, the terminal box 22 may be formed integrally with the casing 21a or the casing 21b.
  • the plate-like bracket 24 is connected to a cylindrical collar 103 that covers the outer skin of the power line 101.
  • the plate-like bracket 24 is fixed to the terminal box 22 with bolts 24 b and seals an annular gap between the outer periphery of the collar 103 and the inner periphery of the through hole 23.
  • the bracket 24 supports and fixes the power line 101 via the collar 103, and prevents foreign matters such as water, mud, and sand from entering the air chamber M from the outside of the terminal box 22 via the through hole 23. To prevent.
  • the outer edge of the disc-shaped casing 21a basically matches the outer diameter of the cylindrical casing 21b, but a part 21d of the outer edge of the casing 21a is formed so as to extend to the outer diameter side of the outer diameter of the casing 21b. As a result, a portion 21d and the casing 21b are displaced in the radial direction, and a passage 27 that connects the inside and outside of the casing is generated.
  • the passage 27 is closed by three conductive members 31 extending in the direction of the axis O and a partition wall 41 that surrounds the outer periphery of the conductive member 31.
  • a groove and a sealing material 26 accommodated along the groove are provided in a portion of the terminal box 22 that contacts the outer edge of the casing 21a.
  • the sealing material 26 is sandwiched between the terminal box 22 and the casing 21a, and seals these gaps. Thereby, the sealing performance of the connection location of the terminal box 22 and the casing 21a improves.
  • a sealing material may be provided at a connection portion between the terminal box 22 and the casing 21b.
  • a rotor 12, a stator 13, a motor shaft 14a, and various rolling bearings 15 and 16 that rotatably support the motor shaft are injected from a rotor oil passage 64 and are disposed inside the in-wheel motor drive device 11.
  • the in-wheel motor drive device 11 is lubricated by the lubricating oil scattered inside.
  • the casings 21 a and 21 b of the present embodiment constitute a motor chamber L inside the in-wheel motor drive device 11.
  • the terminal box 22 which is a box body constitutes the air chamber M.
  • the motor chamber L and the air chamber M are completely partitioned by the conductive member 31 and the partition wall 41, and the lubricating oil in the motor chamber L oozes out into the air chamber M, and conversely, the air in the air chamber M is moved into the motor chamber. No entry into L.
  • the conductive member 31 is a metal rod such as copper and has conductivity. One end of the conductive member 31 is disposed in the motor chamber L, and the other end of the conductive member 31 is disposed in the air chamber M. Female screw holes are formed at both ends of the conductive member 31. A bolt 32 is screwed into a female screw hole at one end of the conductive member 31 disposed in the motor chamber L. Thus, one end of the conductive member 31 is connected to the metal terminal 19 of the conductive wire 18 extending from the motor coil 17 of the stator 13 by the bolt 32. A bolt 33 is screwed into the female screw hole at the other end of the conductive member 31 disposed in the air chamber M. As a result, the other end of the conductive member 31 is connected to the tip metal terminal 102 of the power line 101 extending from the outside of the in-wheel motor drive device 11 by the bolt 33.
  • the work for connecting the power line 101 to the terminal box 22 will be further described.
  • the bolt 25b for fixing the cover 25 to the terminal box 22 is loosened and the cover 25 is removed from the terminal box 22, the conductive member is exposed from the outside of the terminal box 22.
  • the other end of 31 can be accessed.
  • the cover 25 is attached to the terminal box 22 in a posture substantially orthogonal to the axis O and faces the other end of the conductive member 31 and the tip metal terminal 102, the conductive member 31 is made of pebbles and sand flying from the outside. Protected against foreign matter such as water, mud, etc.
  • the partition wall 41 is a member that partitions the motor chamber L and the air chamber M, and is a non-conductor made of a resin having oil resistance such as rubber or plastic.
  • the partition wall 41 of the present embodiment is a single block body having a shape that is approximately equal to the cross-sectional shape of the passage 27 in advance or larger than the cross-sectional shape of the passage 27.
  • the partition wall 41 is inserted and fixed in the passage 27 and fixed to the terminal box 22 by a bolt 45 or other fixing means.
  • the partition wall 41 is provided with three through holes 42 having a shape substantially equal to the cross-sectional shape of the conductive member 31 or smaller than the cross-sectional shape of the conductive member 31.
  • the conductive member 31 is inserted and fixed in the through hole 42.
  • the partition wall 41 surrounds the outer periphery of the conductive member 31 and is in close contact with the passage 27 and the inner wall surface of the terminal box 22 to completely close the annular space between the inner wall surface of the terminal box 22 and the conductive member 31. Therefore, the motor chamber L and the air chamber M inside the in-wheel motor drive device 11 are completely shut off. As a result, the air chamber M, which is the connection point of the power line 101, can be protected from the lubricating oil scattered in the motor chamber L inside the in-wheel motor drive device 11.
  • the inner diameter of the through hole 42 of the partition wall 41 is such that the cross section on the air chamber M side is larger than the cross section on the motor chamber L side.
  • a slightly open annular gap G is formed between the inner peripheral surface of the through hole 42 on the air chamber M side and the outer peripheral surface of the other end of the conductive member 31.
  • the inner peripheral surface of the through hole 42 on the motor chamber L side is in close contact with the outer peripheral surface of one end of the conductive member 31 over the entire periphery, and completely blocks the motor chamber L and the air chamber M.
  • the outer edge on the air chamber M side is made smaller than the outer edge on the motor chamber L side.
  • the conductive member 31 is first inserted through a passage 27 formed in the casings 21 a and 21 b and connecting the motor chamber L and the air chamber M, and the partition wall 41 is an inner peripheral surface of the passage 27. And a resin that is filled in a gap between the conductive member 31 and the outer peripheral surface of the conductive member 31 and is cured by a subsequent chemical reaction.
  • the present embodiment further includes an annular sealing material 43 that surrounds the outer peripheral surface of the conductive member 31 and is embedded in the partition wall 41.
  • the sealing material 43 may be installed in an annular groove formed on the outer periphery of each conductive member 31.
  • the present embodiment further includes an annular sealing material 44 that surrounds the outer peripheral surface of the partition wall 41 that is molded in advance and that contacts the inner peripheral surface of the passage 27.
  • the sealing material 44 is preferably installed in an annular groove formed on the outer periphery of the block-shaped partition wall 41.
  • These sealing materials 43 and 44 are embedded in the partition wall 41 and completely block between the conductive member 31 and the partition wall 41 and between the partition wall 41 and the passage 27. Thereby, the sealing performance in the terminal box 22 is further improved.
  • the sealing materials 43 and 44 are, for example, O-rings.
  • the sealing materials 43 and 44 are rubber annular members, for example.
  • the signal line 105 is a cable in which a plurality of thin core wires are bundled, and extends from the inverter 121 (see FIG. 1).
  • the tip of the signal line 105 is passed through the annular fixing rings 106 and 107, and further passed through the through hole 23 formed in a part of the terminal box 22, and inserted into the terminal box 22.
  • An internal thread is formed on the inner peripheral surface of the through-hole 23, and the outer peripheral surface at one end of the fixing ring 107 is fixed by being screwed.
  • the outer ring of the signal line 105 is supported and fixed to the fixing rings 106 and 107 by screwing the fixing ring 106 to the other end of the fixing ring 107.
  • the fixing rings 106 and 107 prevent foreign matter from entering the second air chamber M from the outside of the terminal box 22 via the through hole 23.
  • a box-shaped connector 34 is disposed in the second air chamber M that is inside the terminal box 22.
  • One end surface of the connector 34 is connected to the tip of the signal line 105.
  • the other end surface of the connector 34 is connected to one end of a signal conducting wire 35 extending from the motor chamber L.
  • the connector 34 has a wall-shaped base 34b on the other end face side.
  • the base 34 b is attached and fixed to the terminal box 22 by bolts 46.
  • the wall-shaped base portion 34 b is disposed along the second partition wall 41 and blocks the air chamber M and the motor chamber L.
  • the signal conducting wire 35 is a second conductive member that extends from the motor chamber L to the second air chamber M and penetrates the second partition wall 41 and the wall-shaped base 34b. One end of the signal conductor 35 is connected to the back surface of the connector 34. The other end of the signal conducting wire 35 is connected to a rotation angle sensor 49 (see FIG. 3) installed inside the in-wheel motor drive device 11.
  • the rotation angle sensor 49 detects the rotation angle of the motor shaft 14 a and outputs a signal corresponding to the rotation angle to the inverter 121.
  • the flock-shaped partition wall 41 is attached and fixed to the terminal box 22 by bolts 45.
  • the in-wheel motor drive device 11 of the present embodiment includes a second air chamber M into which a tip of a signal line 105 extending from the outside of the in-wheel motor drive device 11 is inserted, a motor chamber L, A non-conductive second partition wall 41 that partitions the second air chamber M, and a conductor that extends across the second partition wall 41, one end of which is disposed in the motor chamber L and the rotation angle sensor 49 And a signal conducting wire 35 having the other end arranged in the second air chamber M and connected to the tip of the signal line 105.
  • the partition wall 41 surrounds the outer periphery of the signal conducting wire 35 and is in close contact with the inner wall surface of the terminal box 22, thereby completely closing the annular space between the inner wall surface of the terminal box 22 and the outer periphery of the signal conducting wire 35. Therefore, the motor chamber L and the air chamber M are completely shut off. In addition, the motor chamber L and the air chamber M are completely blocked by the wall-shaped base 34b.
  • the second air chamber M may be in communication with or separated from the air chamber M of the power line 101 shown in FIG.
  • FIG. 6 is a longitudinal sectional view showing another embodiment of the present invention
  • FIG. 7 is a sectional view taken along the line VII-VII in FIG. 6 and viewed in the direction of the arrow.
  • FIG. 8 is an external view of the terminal box as seen from the direction in which FIG. 7 is tilted slightly forward on the paper.
  • the other embodiments shown in FIGS. 6 to 8 are basically the same as the embodiments shown in FIGS. 1 to 4 described above, and the shape and orientation of each member are different. Therefore, configurations common to the above-described embodiment are denoted by the same reference numerals, description thereof is omitted, and different configurations are described below.
  • the connection points of the terminal box 22 and the power lines 101 are arranged in a lame manner. Then, the tip end metal terminal 102 further extending from the power line 101 and the conductive member 31 are connected so as to intersect 90 degrees.
  • the passage 27 extends in an L shape as shown in FIG.
  • Three conductive members 31 having different lengths are used.
  • an insulator 47 as an insulator is interposed between the conductive members 31 and 31 that are adjacent and extend in parallel.
  • a plate-like bracket 24 is individually provided in each through-hole 23 arranged in a laminating manner. For this reason, in order to attach and fix the bracket 24 to the terminal box 22, three support portions 22b having a shape protruding from the outer wall surface of the terminal box 22 are provided, and female screw holes 22m are formed in each support portion 22b. (See FIG. 6). A bolt 24b for mounting and fixing the bracket 24 is screwed into each female screw hole 22m. As shown in FIGS. 6 to 8, it is understood that the partition wall 41 can be applied to the conductive members 31 having different lengths.
  • the radial gap motor is provided with the stator 13 fixed to the casing 22b on the motor part 11A and the rotor 12 arranged at a position facing the inner side of the stator 13 with a radial gap.
  • the motor of arbitrary structures is applicable not only to this but.
  • an axial gap motor in which the stator and the rotor are arranged to face each other via a gap opened in the axial direction may be used.
  • the motor employed in the motor unit 11A is preferably an embedded magnet type synchronous motor (that is, an IPM motor).
  • the in-wheel motor drive device according to the present invention is advantageously used in electric vehicles and hybrid vehicles.
  • 11 In-wheel motor drive unit 11A motor part, 11B deceleration part, 11C hub part, 12 rotor, 13 stator, 14a motor shaft, 15, 16 bearing, 17 motor coil, 18, conductor, 19 metal terminal, 21a, 21b casing , 22 terminal box, 22b support part, 22m female screw hole, 23 through hole, 24 bracket, 25 cover, 26 seal material, 27 passage, 31 conductive member, 31f flange part, 32, 33 bolt, 41 partition wall, 42 through hole 43, 44 seal material, 47 insulator, 101 power line, 102 tip metal terminal, 103 collar, 105 signal line, 106, 107 fixed Grayed, 111 wheels, 112 road wheel, 113 trailing arms, 121 inverter, G annular gap, L motor chamber, M air chamber, S in an empty area.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
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  • Sustainable Energy (AREA)
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Abstract

　An in-wheel motor drive device (11) is provided with an in-wheel motor drive device interior (L) lubricated by lubricating oil, an air chamber (M) in to which a distal end (102) of a power line (101) extending from outside the in-wheel motor drive device is inserted, a non-conductive partitioning wall (41) for partitioning the in-wheel motor drive device interior and the air chamber, and a conductive member (31) which is a conductive body extending across the partitioning wall, one end being arranged in the in-wheel motor drive device interior and connected to a motor coil (17), and the other end being arranged in the air chamber and connected to the distal end of the power line.

Description

インホイールモータ駆動装置In-wheel motor drive device
　本発明は、車輪を駆動するインホイールモータ駆動装置に関し、特にインホイールモータ駆動装置に動力線や信号ケーブル等を引き込む端子ボックスの内部構造に関する。 The present invention relates to an in-wheel motor drive device for driving a wheel, and more particularly to an internal structure of a terminal box for drawing a power line, a signal cable, etc.
　インホイールモータ駆動装置は、電気駆動されることから環境に負荷を与えることが少ないばかりでなく、自動車の車輪内に設置されて当該車輪を駆動することから、エンジン自動車と比較して広い車室スペースを確保することができ、有利である。ところでインホイールモータ駆動装置には、電力を供給するための動力線を接続する必要がある。インホイールモータ駆動装置と動力線との接続構造として本出願人は特許文献１を既に提案している。特許文献１に記載された技術は、インホイールモータ駆動装置のケーシングに端子ボックスを付設し、端子ボックスに３本の動力線をつなぎ込むものである。 The in-wheel motor drive device is not only less burdensome on the environment because it is electrically driven, but also installed in the wheel of an automobile to drive the wheel, so that it has a larger cabin than an engine automobile. Space can be secured, which is advantageous. By the way, it is necessary to connect a power line for supplying electric power to the in-wheel motor drive device. The present applicant has already proposed Patent Document 1 as a connection structure between an in-wheel motor drive device and a power line. In the technique described in Patent Document 1, a terminal box is attached to the casing of the in-wheel motor drive device, and three power lines are connected to the terminal box.
特開２００９－２１９２７１号公報JP 2009-219271 A
　インホイールモータ駆動装置は、路面に接地する車輪のロードホイール内空領域に配置されて、当該車輪を駆動することから、路面側から様々な振動や力がインホイールモータ駆動装置に入力される。またインホイールモータ駆動装置は、サスペンション装置を介して車体に取り付けられることから、車体側からも様々な振動や力がインホイールモータ駆動装置に入力される。さらにインホイールモータ駆動装置は、路面近傍に配置されることから、砂や泥水といった異物が飛来する。したがって砂や泥水といった異物が、インホイールモータ駆動装置と動力線との接続箇所を経由してインホイールモータ駆動装置に侵入したりしないよう、またインホイールモータ駆動装置の内部を潤滑するオイルが当該接続箇所から滲出したりしないよう、通常のモータと比較して格別の密封性を具備する必要がある。 Since the in-wheel motor drive device is disposed in the space area in the road wheel of the wheel that contacts the road surface and drives the wheel, various vibrations and forces are input to the in-wheel motor drive device from the road surface side. Further, since the in-wheel motor driving device is attached to the vehicle body via the suspension device, various vibrations and forces are also input to the in-wheel motor driving device from the vehicle body side. Furthermore, since the in-wheel motor drive device is disposed near the road surface, foreign matters such as sand and muddy water fly. Therefore, foreign matter such as sand and muddy water does not enter the in-wheel motor drive device via the connection point between the in-wheel motor drive device and the power line, and oil that lubricates the inside of the in-wheel motor drive device In order not to ooze out from the connection portion, it is necessary to provide a special sealing property as compared with a normal motor.
　本発明は、上述の実情に鑑み、インホイールモータ駆動装置と動力線との接続箇所において、密封性を改良することを目的とする。 The present invention has been made in view of the above-mentioned circumstances, and an object thereof is to improve the sealing performance at the connection point between the in-wheel motor drive device and the power line.
　この目的のため本発明によるインホイールモータ駆動装置は、潤滑油によって潤滑されるインホイールモータ駆動装置内部と、インホイールモータ駆動装置の外方から延びる動力線の先端が差し込まれる空気室と、インホイールモータ駆動装置内部と空気室とを仕切る非導電性の仕切壁と、仕切壁を横断して延びる導電体であって、一端がインホイールモータ駆動装置内部に配置されてモータコイルと接続し、他端が空気室に配置されて動力線の先端と接続する導電部材とを備える。 For this purpose, an in-wheel motor drive device according to the present invention includes an interior of an in-wheel motor drive device lubricated by lubricating oil, an air chamber into which a front end of a power line extending from the outside of the in-wheel motor drive device is inserted, A non-conductive partition wall that partitions the inside of the wheel motor drive device and the air chamber, and a conductor extending across the partition wall, one end of which is disposed inside the in-wheel motor drive device and connected to the motor coil, The other end is disposed in the air chamber and includes a conductive member connected to the tip of the power line.
　かかる本発明によれば、外方からインホイールモータ駆動装置まで延びる動力線の先端が、インホイールモータ駆動装置の空気室に差し込まれることから、動力線の先端を異物から保護することができる。さらに空気室とインホイールモータ駆動装置内部とは仕切壁で区画されることから、導電部材に沿ってインホイールモータ駆動装置内部から空気室へ潤滑油が滲出することを防止できる。したがってインホイールモータ駆動装置と動力線との接続箇所を、仕切壁、および空気室を画成する壁とによって二重シールすることができ、当該接続箇所の仕切壁によってインホイールモータ駆動装置の内部の密封性を改良することができる。なおインホイールモータ駆動装置内部とは、例えばモータのロータおよびステータを収容するモータ室であったり、あるいは減速機構の歯車組を収容する減速室であったり、あるいはモータのロータおよび減速機構の歯車組を併せて収容する大きな室であったり、回転センサや他の機械要素を収容する室であったりする。 According to the present invention, since the tip of the power line extending from the outside to the in-wheel motor drive device is inserted into the air chamber of the in-wheel motor drive device, the tip of the power line can be protected from foreign matter. Further, since the air chamber and the inside of the in-wheel motor drive device are partitioned by the partition wall, it is possible to prevent the lubricating oil from leaching from the inside of the in-wheel motor drive device to the air chamber along the conductive member. Therefore, the connection location between the in-wheel motor drive device and the power line can be double-sealed by the partition wall and the wall defining the air chamber, and the interior of the in-wheel motor drive device can be formed by the partition wall at the connection location. It is possible to improve the sealing performance. The inside of the in-wheel motor drive device is, for example, a motor chamber that houses a rotor and a stator of a motor, a reduction chamber that houses a gear set of a speed reduction mechanism, or a gear set of a motor rotor and a speed reduction mechanism. Or a large chamber that accommodates the rotation sensor or other mechanical elements.
　なお導電部材の形状は特に限定されない。導電部材は例えば直線あるいは屈曲した丸棒あるいは角棒であってもよいし、両端が折り曲げられた長板であってもよい。また動力線は、インホイールモータ駆動装置のモータに大電流を供給するため、信号ケーブルよりも大電流が流れるため、例えば塩化ビニル樹脂といった非導電性材料で被覆される。 The shape of the conductive member is not particularly limited. The conductive member may be, for example, a straight or bent round bar or square bar, or a long plate with both ends bent. Further, since the power line supplies a large current to the motor of the in-wheel motor driving device, a larger current flows than the signal cable, and therefore, the power line is covered with a nonconductive material such as a vinyl chloride resin.
　本発明の一実施形態として、インホイールモータ駆動装置内部および空気室はインホイールモータ駆動装置のケーシングによってそれぞれ画成され、導電部材はケーシングに形成されてインホイールモータ駆動装置内部と空気室を連絡する通路に挿通され、非導電性の仕切壁は通路の内周面と導電部材の外周面との隙間に充填される樹脂である。かかる実施形態によれば、孔の内周面と導電部材の外周面との隙間を樹脂で充填することから、仕切壁の密封機能を確実にすることができる。他の実施形態として、仕切壁は予め成形された部品であって、孔の内周面と導電部材の外周面との間に介挿されるものであってもよい。 As an embodiment of the present invention, the interior of the in-wheel motor drive device and the air chamber are respectively defined by the casing of the in-wheel motor drive device, and the conductive member is formed in the casing to connect the interior of the in-wheel motor drive device and the air chamber. The non-conductive partition wall is a resin filled in a gap between the inner peripheral surface of the passage and the outer peripheral surface of the conductive member. According to this embodiment, since the gap between the inner peripheral surface of the hole and the outer peripheral surface of the conductive member is filled with the resin, the sealing function of the partition wall can be ensured. As another embodiment, the partition wall may be a pre-formed component, and may be interposed between the inner peripheral surface of the hole and the outer peripheral surface of the conductive member.
　本発明の好ましい実施形態として、導電部材の外周面を包囲するとともに仕切壁に埋設される環状のシール材をさらに備える。かかる実施形態によれば、導電部材の外周面が仕切壁に包囲されるだけでなく、環状のシール材が導電部材の外周面と仕切壁との間に介在することから、仕切壁の密封性を一層確実にすることができる。したがって、密封機能の耐久性が向上し、経年劣化を防止できる。 As a preferred embodiment of the present invention, an annular sealing material that surrounds the outer peripheral surface of the conductive member and is embedded in the partition wall is further provided. According to this embodiment, not only the outer peripheral surface of the conductive member is surrounded by the partition wall, but also the annular sealing material is interposed between the outer peripheral surface of the conductive member and the partition wall, so that the sealing performance of the partition wall is increased. Can be further ensured. Therefore, the durability of the sealing function is improved and deterioration over time can be prevented.
　本発明の好ましい実施形態として、インホイールモータ駆動装置の外方から延びる信号線の先端が差し込まれる第２の空気室と、この第２空気室とインホイールモータ駆動装置内部とを仕切る非導電性の第２の仕切壁と、この第２仕切壁を横断して延びる導電体であって、一端がインホイールモータ駆動装置内部に配置されてセンサと接続し、他端が第２空気室に配置されて信号線の先端と接続する第２の導電部材とをさらに備えてもよい。かかる実施形態によれば、外方からインホイールモータ駆動装置まで延びる信号線の先端が、インホイールモータ駆動装置の第２空気室に差し込まれることから、信号線の先端を異物から保護することができる。さらに第２空気室とインホイールモータ駆動装置内部とは仕切壁で区画されることから、第２の導電部材に沿ってインホイールモータ駆動装置内部から第２空気室へ潤滑油が滲出することを防止できる。したがってインホイールモータ駆動装置と信号線との接続箇所を、仕切壁、および空気室を画成する壁とによって二重シールすることができ、第２仕切壁によってインホイールモータ駆動装置の内部の密封性を一層向上することができる。 As a preferred embodiment of the present invention, a second air chamber into which a tip of a signal line extending from the outside of the in-wheel motor drive device is inserted, and a non-conductive property that partitions the second air chamber from the inside of the in-wheel motor drive device A second partition wall and a conductor extending across the second partition wall, one end of which is disposed inside the in-wheel motor drive device and connected to the sensor, and the other end is disposed in the second air chamber. And a second conductive member connected to the tip of the signal line. According to this embodiment, since the tip of the signal line extending from the outside to the in-wheel motor drive device is inserted into the second air chamber of the in-wheel motor drive device, the tip of the signal line can be protected from foreign matter. it can. Furthermore, since the second air chamber and the inside of the in-wheel motor drive device are partitioned by a partition wall, the lubricating oil oozes out from the inside of the in-wheel motor drive device to the second air chamber along the second conductive member. Can be prevented. Accordingly, the connection portion between the in-wheel motor drive device and the signal line can be double-sealed by the partition wall and the wall defining the air chamber, and the inside of the in-wheel motor drive device can be sealed by the second partition wall. The property can be further improved.
　このように本発明によれば、インホイールモータ駆動装置と動力線との接続箇所を、空気室を画成する壁によって異物から保護することができ、さらにインホイールモータ駆動装置内部を画成する壁によってインホイールモータ駆動装置の潤滑油から保護することができる。 As described above, according to the present invention, the connection portion between the in-wheel motor driving device and the power line can be protected from foreign matter by the wall defining the air chamber, and further, the inside of the in-wheel motor driving device is defined. The walls can protect against in-wheel motor drive lubricant.
　またインホイールモータ駆動装置の内部は、基本的にケーシングによって密封性を確保されるが、ケーシングの一部は穿孔されて動力線の先端が差し込まれる箇所が設けられるため、当該箇所で密封性が脆弱になる虞がある。本発明によれば、空気室を画成する壁およびインホイールモータ駆動装置内部を画成する壁によってインホイールモータ駆動装置の内部、を異物から保護することができる。しかも仕切壁によってインホイールモータ駆動装置内部の密封性を確保することができる。さらに仕切壁も空気室を画成する壁によって異物から保護される。 Also, the inside of the in-wheel motor drive device is basically secured by the casing. However, since a part of the casing is perforated and a tip of the power line is inserted, the sealing performance is provided at the part. There is a risk of becoming vulnerable. ADVANTAGE OF THE INVENTION According to this invention, the inside of an in-wheel motor drive device can be protected from a foreign material by the wall which defines an air chamber, and the wall which defines the inside of an in-wheel motor drive device. Moreover, the sealing performance inside the in-wheel motor drive device can be ensured by the partition wall. Furthermore, the partition wall is also protected from foreign matter by the wall defining the air chamber.
　インホイールモータ駆動装置は、路面に近いため水、泥、砂、塵埃などの異物が頻繁に飛来するが、本発明を備えることにより、動力線の接続箇所の密封性が従来よりも改良されて、耐久性が向上する。 Since the in-wheel motor drive device is close to the road surface, foreign matters such as water, mud, sand, and dust frequently fly. However, the provision of the present invention improves the sealing performance of the connection part of the power line than before. , Durability is improved.
本発明の一実施形態になるインホイールモータ駆動装置を示す説明図である。It is explanatory drawing which shows the in-wheel motor drive device which becomes one Embodiment of this invention. 同実施形態の基本構成を示す概略縦断面図である。It is a schematic longitudinal cross-sectional view which shows the basic composition of the embodiment. 同実施形態の端子ボックスおよびモータ部の縦断面図である。It is a longitudinal cross-sectional view of the terminal box and motor part of the embodiment. 端子ボックスの断面図である。It is sectional drawing of a terminal box. 端子ボックスと信号線の接続構造を示す概略断面図である。It is a schematic sectional drawing which shows the connection structure of a terminal box and a signal wire | line. 本発明の他の実施形態になるインホイールモータ駆動装置を示す縦断面図である。It is a longitudinal cross-sectional view which shows the in-wheel motor drive device which becomes other embodiment of this invention. 図６のＶＩＩ‐ＶＩＩで切断し、矢の向きにみた状態を示す断面図である。It is sectional drawing which shows the state cut | disconnected by VII-VII of FIG. 図７と同じ方向からみた端子ボックスの外観図である。It is an external view of the terminal box seen from the same direction as FIG.
　以下、本発明の実施の形態を、図面に基づき詳細に説明する。図１は本発明の一実施形態になるインホイールモータ駆動装置を示す説明図であり、車幅方向内側からみたものである。図２は、同実施形態の基本構成を示す概略縦断面図である。図３は、図２とは別な断面における同実施形態を示す説明図であって、端子ボックスおよびモータ部の断面図を表す。図４は端子ボックスの断面図であり、図３のＩＶ－ＩＶで切断し、矢印の向きにみた状態を示す断面図である。なお図３は、インホイールモータ駆動装置の軸線Ｏを含む平面でインホイールモータ駆動装置を切断した断面を表す。インホイールモータ駆動装置の内部は、軸線Ｏを挟んで略対称であることから、軸線Ｏを挟む一方側を示し、他方側を図略する。インホイールモータ駆動装置１１は、略円筒形状であり、インホイールモータ駆動装置１１の軸線Ｏ方向に順次直列かつ同軸に配置されたモータ部１１Ａ、減速部１１Ｂ、およびハブ部１１Ｃを備える。ハブ部１１Ｃに隣接する減速部１１Ｂは、ハブ部１１Ｃよりも大径にされる。減速部１１Ｂに隣接するモータ部１１Ａは、減速部１１Ｂよりも大径にされる。 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is an explanatory view showing an in-wheel motor drive device according to an embodiment of the present invention, as viewed from the inner side in the vehicle width direction. FIG. 2 is a schematic longitudinal sectional view showing a basic configuration of the embodiment. FIG. 3 is an explanatory view showing the same embodiment in a cross section different from that in FIG. 2, and shows a cross sectional view of the terminal box and the motor unit. FIG. 4 is a cross-sectional view of the terminal box, which is a cross-sectional view taken along the line IV-IV in FIG. 3 and viewed in the direction of the arrow. FIG. 3 shows a cross section of the in-wheel motor drive device cut along a plane including the axis O of the in-wheel motor drive device. Since the inside of the in-wheel motor drive device is substantially symmetric with respect to the axis O, one side across the axis O is shown and the other side is omitted. The in-wheel motor drive device 11 has a substantially cylindrical shape, and includes a motor unit 11A, a reduction unit 11B, and a hub unit 11C that are sequentially arranged in series and coaxially in the axis O direction of the in-wheel motor drive device 11. The speed reduction part 11B adjacent to the hub part 11C is made larger in diameter than the hub part 11C. The motor part 11A adjacent to the speed reducing part 11B has a larger diameter than the speed reducing part 11B.
　図２に示すように、モータ部１１Ａおよび減速部１１Ｂの外郭をなすケーシング２１ｂは非回転の固定部材である。これに対しハブ部１１Ｃは内輪側の回転部材および外輪側の固定部材を有し、このうち回転部材（ハブ輪７７）には車輪１１１が取付固定されて、モータ部１１Ａの回転駆動力を車輪１１１に伝えると共に車輪１１１を回転支持する。そしてインホイールモータ駆動装置１１は、図１に示すように、車輪１１１のロードホイール１１２の内空領域Ｓに設けられる。 As shown in FIG. 2, the casing 21b that forms the outline of the motor unit 11A and the speed reduction unit 11B is a non-rotating fixed member. On the other hand, the hub portion 11C has a rotating member on the inner ring side and a fixing member on the outer ring side, and a wheel 111 is attached and fixed to the rotating member (hub wheel 77), and the rotational driving force of the motor portion 11A is supplied to the wheel. The wheel 111 is rotated and supported. The in-wheel motor drive device 11 is provided in the inner space S of the road wheel 112 of the wheel 111 as shown in FIG.
　内空領域Ｓはロードホイール１１２のリム部に包囲された円形空間であり、ハブ部１１Ｃの全部、減速部１１Ｂの全部、およびモータ部１１Ａの一部が内空領域Ｓ内に位置する。これに対しモータ部１１Ａの端面側部分は内空領域Ｓ外に位置する。またサスペンション装置のトレーリングアーム１１３は、車両前後方向に延びるとともに、トレーリングアーム１１３の後端が内空領域Ｓまで車幅方向外側にも延びてケーシング２１ｂと結合する。 The inner space region S is a circular space surrounded by the rim portion of the road wheel 112, and the entire hub portion 11C, the entire speed reduction portion 11B, and a part of the motor portion 11A are located in the inner space region S. On the other hand, the end surface side portion of the motor unit 11A is located outside the inner space region S. In addition, the trailing arm 113 of the suspension device extends in the vehicle front-rear direction, and the trailing end of the trailing arm 113 extends to the inner space region S to the outer side in the vehicle width direction and is coupled to the casing 21b.
　モータ部１１Ａは、図２に示すように、回転電機のロータ１２、ステータ１３、およびモータ軸１４ａをケーシング２１ａ，２１ｂ内のモータ室Ｌに収容している。そして、モータ部１１Ａは減速部１１Ｂを通じてハブ部１１Ｃを回転駆動し、あるいは制動時などにおいてハブ部１１Ｃ（車輪１１１）の回転を利用して電力回生を行う。なおケーシング２１ａは、モータ部１１Ａの端部を閉塞する円板状部材である。ケーシング２１ｂは両端開口の筒状部材であり、その一端がケーシング２１ａで塞がれ、その軸線方向一端側の内周面にステータ１３が周方向所定間隔に取付固定される。ステータ１３よりも内径側にはロータ１２が配置され、ロータ１２は軸線Ｏに沿って延びるモータ軸１４ａに取付固定される。 As shown in FIG. 2, the motor unit 11A houses a rotor 12, a stator 13, and a motor shaft 14a of a rotating electrical machine in a motor chamber L in casings 21a and 21b. The motor unit 11A rotationally drives the hub unit 11C through the speed reduction unit 11B, or performs power regeneration using the rotation of the hub unit 11C (wheel 111) during braking or the like. The casing 21a is a disk-like member that closes the end of the motor unit 11A. The casing 21b is a cylindrical member that is open at both ends. One end of the casing 21b is closed by the casing 21a, and the stator 13 is attached and fixed to the inner peripheral surface at one end in the axial direction at a predetermined interval in the circumferential direction. The rotor 12 is disposed on the inner diameter side of the stator 13, and the rotor 12 is attached and fixed to a motor shaft 14 a extending along the axis O.
　ケーシング２１ｂは軸線方向他端側で減速室Ｎを画成し、減速室Ｎに減速部１１Ｂの減速機構を収容する。この減速機構はサイクロイド減速機構であり、入力軸１４ｂと、一対の偏心部材７１と、２個の転がり軸受７２と、波形状の２枚の曲線板７３と、内ピン７４と、外ピン７５と、出力軸７６とを有する。減速部１１Ｂの入力軸１４ｂはモータ部１１Ａのモータ軸１４ａに連結固定される。偏心部材７１は偏心して入力軸１４ｂに設けられる。２枚の曲線板７３は中央孔を有し、この中央孔の内周面がそれぞれ転がり軸受７２を介して偏心部材７１の外周面に回転自在に支持される。外ピン７５はケーシング２１ｂに弾性支持された外ピンハウジング７９に固定されて、曲線板７３の波形に形成された外周部と係合し、軸線Ｏ回りに公転する曲線板７３を自転運動させる。内ピン７４は出力軸７６に取付固定されて、曲線板７３の自転運動のみを取り出し、出力軸７６に伝達する。入力軸１４ｂの回転は、減速部１１Ｂにより減速されて、出力軸７６から出力される。 The casing 21b defines a deceleration chamber N at the other end in the axial direction, and the deceleration mechanism of the deceleration unit 11B is accommodated in the deceleration chamber N. This speed reduction mechanism is a cycloid speed reduction mechanism, and includes an input shaft 14b, a pair of eccentric members 71, two rolling bearings 72, two corrugated curved plates 73, an inner pin 74, and an outer pin 75. And an output shaft 76. The input shaft 14b of the deceleration unit 11B is connected and fixed to the motor shaft 14a of the motor unit 11A. The eccentric member 71 is eccentrically provided on the input shaft 14b. The two curved plates 73 have a central hole, and the inner peripheral surface of the central hole is rotatably supported on the outer peripheral surface of the eccentric member 71 via the rolling bearing 72. The outer pin 75 is fixed to the outer pin housing 79 elastically supported by the casing 21b, engages with the outer peripheral portion formed in the waveform of the curved plate 73, and rotates the curved plate 73 revolving around the axis O. The inner pin 74 is attached and fixed to the output shaft 76, extracts only the rotational movement of the curved plate 73, and transmits it to the output shaft 76. The rotation of the input shaft 14b is decelerated by the deceleration unit 11B and output from the output shaft 76.
　出力軸７６にはハブ輪７７が連結固定される。ハブ輪７７は転がり軸受７８を介して、ケーシング２１ｂに回転自在に支持される。またハブ輪７７にはロードホイール１１２が取付固定される。 The hub wheel 77 is connected and fixed to the output shaft 76. The hub wheel 77 is rotatably supported by the casing 21b via a rolling bearing 78. A road wheel 112 is fixedly attached to the hub wheel 77.
　インホイールモータ駆動装置１１は軸心給油方式の潤滑油回路を備え、モータ部１１Ａおよび減速部１１Ｂを潤滑する。具体的には、ケーシング２１ｂの下部に潤滑油タンク５３が附設される。モータ部１１Ａを収容するモータ室Ｌと減速部１１Ｂを収容する減速室Ｎとの境界になるケーシングの隔壁２１ｅには、潤滑油ポンプ５１が設けられている。潤滑油ポンプ５１は、軸線Ｏと同軸に配置され、内ピン７４に固定された内ピン補強部材７４ｂによって駆動される。隔壁２１ｅの壁内部に形成された吸入油路５２は、上下方向に延びて、その上端が潤滑油ポンプ５１の吸入口と接続し、その下端が減速部１１Ｂの下部に設けられた潤滑油タンク５３と接続する。隔壁２１ｅの壁内部に形成された吐出油路５４は、上下方向に延びて、その下端で潤滑油ポンプ５１の吐出口と接続し、その上端でケーシング２１ｂに形成されたケーシング油路５５の一端と接続する。 The in-wheel motor drive device 11 is provided with a lubricating oil circuit of an axial oil supply system, and lubricates the motor part 11A and the reduction part 11B. Specifically, a lubricating oil tank 53 is attached to the lower part of the casing 21b. A lubricating oil pump 51 is provided in a partition wall 21e of the casing that serves as a boundary between the motor chamber L that houses the motor unit 11A and the deceleration chamber N that houses the deceleration unit 11B. The lubricating oil pump 51 is arranged coaxially with the axis O and is driven by an inner pin reinforcing member 74 b fixed to the inner pin 74. A suction oil passage 52 formed in the wall of the partition wall 21e extends in the vertical direction, and an upper end thereof is connected to the suction port of the lubricant pump 51, and a lower end thereof is provided in the lower portion of the speed reduction unit 11B. 53. The discharge oil passage 54 formed in the wall of the partition wall 21e extends in the vertical direction, is connected to the discharge port of the lubricating oil pump 51 at the lower end, and is one end of the casing oil passage 55 formed in the casing 21b at the upper end. Connect with.
　ケーシング油路５５は、中空円筒壁になるケーシング２１ｂの壁内部に形成されて、軸線方向に延びている。ケーシング油路５５のケーシング２１ａ側の端部は、連絡油路５６の外径側端と接続する、連絡油路５６は、円板状の壁になるケーシング２１ａの壁内部に形成されて、径方向に延びる。連絡油路５６の内径側端は、モータ軸１４ａに設けられるモータ軸油路５８ａと接続する。 The casing oil passage 55 is formed inside the wall of the casing 21b which becomes a hollow cylindrical wall, and extends in the axial direction. An end of the casing oil passage 55 on the casing 21a side is connected to an outer diameter side end of the communication oil passage 56. The communication oil passage 56 is formed inside the wall of the casing 21a which becomes a disk-shaped wall. Extend in the direction. The inner diameter side end of the communication oil passage 56 is connected to a motor shaft oil passage 58a provided in the motor shaft 14a.
　モータ軸油路５８ａは、モータ軸１４ａの内部に設けられて軸線Ｏに沿って延びる。そして、モータ軸油路５８ａの減速部１１Ｂに近い側の一端が、入力軸１４ｂに設けられて軸線Ｏに沿って延びる減速部入力軸油路５８ｂと接続する。また、モータ軸油路５８ａの減速部１１Ｂから遠い側の一端が、上述した連絡油路５６と接続する。さらにモータ軸油路５８ａは、途中の軸線方向中央部のロータフランジ部に形成されたロータ油路６４の内径側端と接続する。 The motor shaft oil passage 58a is provided inside the motor shaft 14a and extends along the axis O. Then, one end of the motor shaft oil passage 58a closer to the speed reduction portion 11B is connected to a speed reduction portion input shaft oil passage 58b provided on the input shaft 14b and extending along the axis O. Further, one end of the motor shaft oil passage 58a on the side far from the speed reduction portion 11B is connected to the communication oil passage 56 described above. Further, the motor shaft oil passage 58a is connected to the inner diameter side end of the rotor oil passage 64 formed in the rotor flange portion in the middle in the axial direction.
　減速部入力軸油路５８ｂは、入力軸１４ｂの内部に設けられて、入力軸１４ｂの両端間を軸線Ｏに沿って延びる。出力軸７６と対向する一端には、潤滑油孔６０が設けられる。潤滑油孔６０は潤滑油を減速室Ｎに向けて噴射する。 The speed reducer input shaft oil passage 58b is provided inside the input shaft 14b and extends along the axis O between both ends of the input shaft 14b. A lubricating oil hole 60 is provided at one end facing the output shaft 76. The lubricating oil hole 60 injects lubricating oil toward the deceleration chamber N.
　減速部入力軸油路５８ｂは、偏心部材７１内を径方向外側に向かって延びる潤滑油路５９に分岐する。潤滑油路５９の外径側端は、偏心部材７１の外周面および曲線板７３の内周面間に設けられた転がり軸受７２と接続する。 The speed reducer input shaft oil passage 58b branches into a lubricating oil passage 59 extending radially outward in the eccentric member 71. The outer diameter side end of the lubricating oil passage 59 is connected to a rolling bearing 72 provided between the outer peripheral surface of the eccentric member 71 and the inner peripheral surface of the curved plate 73.
　減速室Ｎの底部には、減速部リターン孔６１が設けられる。減速部リターン孔６１はケーシング２１ｂを貫通し、減速室Ｎと潤滑油タンク５３を連通する。またモータ室Ｌの底部には、モータ部リターン孔６６が設けられる。モータ部リターン孔６６は隔壁２１ｅを貫通し、モータ室Ｌと潤滑油タンク５３を連通する。 At the bottom of the deceleration chamber N, a deceleration unit return hole 61 is provided. The speed reduction part return hole 61 passes through the casing 21 b and connects the speed reduction chamber N and the lubricating oil tank 53. A motor part return hole 66 is provided at the bottom of the motor chamber L. The motor part return hole 66 penetrates the partition wall 21 e and communicates the motor chamber L and the lubricating oil tank 53.
　潤滑油回路の作用につき説明すると、内ピン補強部材７４ｂを介して出力軸７６によって駆動される潤滑油ポンプ５１は、図２に白抜き矢印で示すように、吸入油路５２を介して潤滑油タンク５３に貯留した潤滑油を吸入し、吐出油路５４に潤滑油を吐出する。潤滑油は、潤滑油ポンプ５１によって加圧され、吐出油路５４からケーシング油路５５と、連絡油路５６と、モータ軸油路５８ａとを順次流れる。モータ軸油路５８ａを流れる潤滑油は、一部がロータ油路６４に流入し、ロータ１２の外周面からモータ室Ｌに噴射されて、ロータ１２およびステータ１３を潤滑および冷却する。次に潤滑油は、モータ室Ｌの底部へ向かい、モータ部リターン孔６６を経て潤滑油タンク５３に還流する。このようにしてモータ部１１Ａは軸心給油方式によって潤滑される。またモータ室Ｌには噴射された潤滑油が充満する。 The operation of the lubricating oil circuit will be described. The lubricating oil pump 51 driven by the output shaft 76 via the inner pin reinforcing member 74b is connected to the lubricating oil via the suction oil passage 52 as indicated by a white arrow in FIG. The lubricating oil stored in the tank 53 is sucked and the lubricating oil is discharged to the discharge oil passage 54. The lubricating oil is pressurized by the lubricating oil pump 51 and flows sequentially from the discharge oil passage 54 to the casing oil passage 55, the communication oil passage 56, and the motor shaft oil passage 58a. Part of the lubricating oil flowing through the motor shaft oil passage 58 a flows into the rotor oil passage 64 and is injected from the outer peripheral surface of the rotor 12 into the motor chamber L to lubricate and cool the rotor 12 and the stator 13. Next, the lubricating oil goes to the bottom of the motor chamber L and returns to the lubricating oil tank 53 through the motor part return hole 66. In this way, the motor portion 11A is lubricated by the axial center oil supply system. The motor chamber L is filled with the injected lubricating oil.
　モータ軸油路５８ａから減速部入力軸油路５８ｂに流れる潤滑油は、分岐して潤滑油路５９および潤滑油孔６０を流れて減速室Ｎに噴射され、減速部１１Ｂの転がり軸受７２、曲線板７３、内ピン７４、および外ピン７５を潤滑および冷却する。次に潤滑油は、減速室Ｎの底部へ向かい、減速部リターン孔６１を経て潤滑油タンク５３に還流する。このようにして減速部１１Ｂは軸心給油方式によって潤滑される。また減速室Ｎには噴射された潤滑油が充満する。 Lubricating oil flowing from the motor shaft oil passage 58a to the speed reducing portion input shaft oil passage 58b branches, flows through the lubricating oil passage 59 and the lubricating oil hole 60, and is injected into the speed reducing chamber N. The rolling bearing 72 of the speed reducing portion 11B, the curve The plate 73, the inner pin 74, and the outer pin 75 are lubricated and cooled. Next, the lubricating oil goes to the bottom of the deceleration chamber N and returns to the lubricating oil tank 53 through the deceleration unit return hole 61. In this way, the speed reducing portion 11B is lubricated by the axial center oil supply system. The deceleration chamber N is filled with the injected lubricating oil.
　モータ部１１Ａの外周には、図１に示すように、モータ部１１Ａにインバータ１２１から延びる３本の動力線１０１を引き込むための端子ボックス２２が設けられる。端子ボックス２２は減速部１１Ｂのケーシングに取付けられるトレーリングアーム１１３の車体内側に位置するように設けられる。また３本の動力線１０１はトレーリングアーム１１３の車幅方向内側面に支持されて、端子ボックス２２からトレーリングアーム１１３に沿って車両前方へ延びる。また、モータの回転角度を検出する回転角度センサ４９の信号線１０５も３本の動力線１０１と同様に端子ボックス２２からトレーリングアーム１１３に沿って車両前方へ延びている。図３に示すように、端子ボックス２２は軸線Ｏに対して直角方向に延びる３個の貫通孔２３と、３個の貫通孔２３にまたがって設けられて、貫通孔２３に差し込まれる動力線１０１を共通して支持固定する１枚のブラケット２４と、端子ボックス２２の一側を閉塞する板状のカバー２５とを含む箱体である。そして端子ボックス２２はケーシング２１ａ，２１ｂに取付固定される。このように端子ボックス２２はケーシングの一部と考えられ得る。したがって変形例として、端子ボックス２２はケーシング２１ａあるいはケーシング２１ｂと一体に形成されてもよい。 As shown in FIG. 1, a terminal box 22 for drawing three power lines 101 extending from the inverter 121 into the motor unit 11A is provided on the outer periphery of the motor unit 11A. The terminal box 22 is provided so as to be positioned inside the vehicle body of the trailing arm 113 attached to the casing of the speed reducing portion 11B. The three power lines 101 are supported on the inner surface in the vehicle width direction of the trailing arm 113 and extend forward from the terminal box 22 along the trailing arm 113 to the front of the vehicle. Similarly to the three power lines 101, the signal line 105 of the rotation angle sensor 49 that detects the rotation angle of the motor extends from the terminal box 22 along the trailing arm 113 to the front of the vehicle. As shown in FIG. 3, the terminal box 22 is provided across the three through holes 23 extending in the direction perpendicular to the axis O and the three through holes 23, and the power line 101 inserted into the through hole 23. This is a box that includes one bracket 24 that supports and fixes the same in common and a plate-like cover 25 that closes one side of the terminal box 22. The terminal box 22 is attached and fixed to the casings 21a and 21b. Thus, the terminal box 22 can be considered part of the casing. Therefore, as a modification, the terminal box 22 may be formed integrally with the casing 21a or the casing 21b.
　板状のブラケット２４は、動力線１０１の外皮を覆う筒状のカラー１０３と連結する。また板状のブラケット２４は、ボルト２４ｂによって端子ボックス２２に固定され、カラー１０３の外周と貫通孔２３の内周との環状隙間を封止する。かくしてブラケット２４は、カラー１０３を介して動力線１０１を支持固定するとともに、端子ボックス２２の外方から貫通孔２３を経由して空気室Ｍに水、泥、砂等の異物が侵入することを防止する。 The plate-like bracket 24 is connected to a cylindrical collar 103 that covers the outer skin of the power line 101. The plate-like bracket 24 is fixed to the terminal box 22 with bolts 24 b and seals an annular gap between the outer periphery of the collar 103 and the inner periphery of the through hole 23. Thus, the bracket 24 supports and fixes the power line 101 via the collar 103, and prevents foreign matters such as water, mud, and sand from entering the air chamber M from the outside of the terminal box 22 via the through hole 23. To prevent.
　円板状のケーシング２１ａの外縁は基本的に円筒状のケーシング２１ｂの外径に一致するが、ケーシング２１ａの外縁の一部２１ｄがケーシング２１ｂの外径よりも外径側に広がるよう形成されることにより、一部２１ｄとケーシング２１ｂが径方向にずれて、ケーシングの内外を連絡する通路２７が生じる。かかる通路２７は、軸線Ｏ方向に延びる３本の導電部材３１と、導電部材３１の外周を包囲する仕切壁４１によって閉塞される。 The outer edge of the disc-shaped casing 21a basically matches the outer diameter of the cylindrical casing 21b, but a part 21d of the outer edge of the casing 21a is formed so as to extend to the outer diameter side of the outer diameter of the casing 21b. As a result, a portion 21d and the casing 21b are displaced in the radial direction, and a passage 27 that connects the inside and outside of the casing is generated. The passage 27 is closed by three conductive members 31 extending in the direction of the axis O and a partition wall 41 that surrounds the outer periphery of the conductive member 31.
　端子ボックス２２のうちケーシング２１ａの外縁と接触する箇所には、溝およびこの溝に沿って収容されるシール材２６が設けられる。シール材２６は端子ボックス２２およびケーシング２１ａに挟まれ、これらの隙間を封止する。これにより、端子ボックス２２とケーシング２１ａとの接続箇所の密封性が向上する。なお図には示さなかったが、端子ボックス２２とケーシング２１ｂとの接続箇所についてもシール材を設けるとよい。 A groove and a sealing material 26 accommodated along the groove are provided in a portion of the terminal box 22 that contacts the outer edge of the casing 21a. The sealing material 26 is sandwiched between the terminal box 22 and the casing 21a, and seals these gaps. Thereby, the sealing performance of the connection location of the terminal box 22 and the casing 21a improves. Although not shown in the drawing, a sealing material may be provided at a connection portion between the terminal box 22 and the casing 21b.
　インホイールモータ駆動装置１１の内部に配置されたロータ１２と、ステータ１３と、モータ軸１４ａと、モータ軸を回転自在に支持する各種の転がり軸受１５，１６は、ロータ油路６４から噴射されてインホイールモータ駆動装置１１の内部を飛散している潤滑油によって潤滑される。本実施形態のケーシング２１ａ，２１ｂは、インホイールモータ駆動装置１１の内部に、モータ室Ｌを構成する。これに対し、箱体である端子ボックス２２は、空気室Ｍを構成する。モータ室Ｌおよび空気室Ｍは、導電部材３１および仕切壁４１によって完全に仕切られており、モータ室Ｌ内の潤滑油が空気室Ｍへ滲出したり、反対に空気室Ｍの空気がモータ室Ｌ内へ侵入したりすることはない。 A rotor 12, a stator 13, a motor shaft 14a, and various rolling bearings 15 and 16 that rotatably support the motor shaft are injected from a rotor oil passage 64 and are disposed inside the in-wheel motor drive device 11. The in-wheel motor drive device 11 is lubricated by the lubricating oil scattered inside. The casings 21 a and 21 b of the present embodiment constitute a motor chamber L inside the in-wheel motor drive device 11. On the other hand, the terminal box 22 which is a box body constitutes the air chamber M. The motor chamber L and the air chamber M are completely partitioned by the conductive member 31 and the partition wall 41, and the lubricating oil in the motor chamber L oozes out into the air chamber M, and conversely, the air in the air chamber M is moved into the motor chamber. No entry into L.
　導電部材３１は銅等の金属棒であり導電性を有する。導電部材３１の一端はモータ室Ｌに配置され、導電部材３１の他端は空気室Ｍに配置される。そして導電部材３１の両端には雌ねじ孔が形成される。モータ室Ｌに配置された導電部材３１の一端の雌ねじ孔にはボルト３２が螺合する。これにより導電部材３１の一端は、ボルト３２によって、ステータ１３のモータコイル１７から延びる導線１８の金属端子１９と接続する。空気室Ｍに配置された導電部材３１の他端の雌ねじ孔にはボルト３３が螺合する。これにより導電部材３１の他端は、ボルト３３によって、インホイールモータ駆動装置１１の外方から延びる動力線１０１の先端金属端子１０２と接続する。 The conductive member 31 is a metal rod such as copper and has conductivity. One end of the conductive member 31 is disposed in the motor chamber L, and the other end of the conductive member 31 is disposed in the air chamber M. Female screw holes are formed at both ends of the conductive member 31. A bolt 32 is screwed into a female screw hole at one end of the conductive member 31 disposed in the motor chamber L. Thus, one end of the conductive member 31 is connected to the metal terminal 19 of the conductive wire 18 extending from the motor coil 17 of the stator 13 by the bolt 32. A bolt 33 is screwed into the female screw hole at the other end of the conductive member 31 disposed in the air chamber M. As a result, the other end of the conductive member 31 is connected to the tip metal terminal 102 of the power line 101 extending from the outside of the in-wheel motor drive device 11 by the bolt 33.
　ここで動力線１０１を端子ボックス２２に接続する作業につき付言すると、カバー２５を端子ボックス２２に固定するボルト２５ｂを緩め、カバー２５を端子ボックス２２から取り外すと、端子ボックス２２の外方から導電部材３１の他端にアクセスすることができる。またカバー２５は、軸線Ｏと略直交する姿勢で端子ボックス２２に取り付けられて、導電部材３１の他端および先端金属端子１０２と対面することから、導電部材３１は外方から飛来する小石、砂、水、泥等の異物に対して保護される。 Here, the work for connecting the power line 101 to the terminal box 22 will be further described. When the bolt 25b for fixing the cover 25 to the terminal box 22 is loosened and the cover 25 is removed from the terminal box 22, the conductive member is exposed from the outside of the terminal box 22. The other end of 31 can be accessed. Further, since the cover 25 is attached to the terminal box 22 in a posture substantially orthogonal to the axis O and faces the other end of the conductive member 31 and the tip metal terminal 102, the conductive member 31 is made of pebbles and sand flying from the outside. Protected against foreign matter such as water, mud, etc.
　仕切壁４１は、図４に示すように、モータ室Ｌと空気室Ｍとを仕切る部材であって、ゴムやプラスチック等耐油性を備えた樹脂からなる非導電体である。本実施形態の仕切壁４１は、予め通路２７の断面形状と略等しいか、あるいは通路２７の断面形状よりも大きな形状を備えた１つのブロック体である。そして仕切壁４１は、通路２７に挿入固定され、ボルト４５あるいは他の固定手段によって端子ボックス２２に固定される。さらに仕切壁４１には、導電部材３１の断面形状と略等しいか、あるいは導電部材３１の断面形状よりも小さな形状を有する３本の貫通孔４２が設けられる。そして導電部材３１は貫通孔４２に挿入固定される。 As shown in FIG. 4, the partition wall 41 is a member that partitions the motor chamber L and the air chamber M, and is a non-conductor made of a resin having oil resistance such as rubber or plastic. The partition wall 41 of the present embodiment is a single block body having a shape that is approximately equal to the cross-sectional shape of the passage 27 in advance or larger than the cross-sectional shape of the passage 27. The partition wall 41 is inserted and fixed in the passage 27 and fixed to the terminal box 22 by a bolt 45 or other fixing means. Further, the partition wall 41 is provided with three through holes 42 having a shape substantially equal to the cross-sectional shape of the conductive member 31 or smaller than the cross-sectional shape of the conductive member 31. The conductive member 31 is inserted and fixed in the through hole 42.
　仕切壁４１は導電部材３１の外周を包囲するとともに通路２７および端子ボックス２２の内壁面に密着して、端子ボックス２２の内壁面と導電部材３１との間の環状空間を完全に閉塞する。したがってインホイールモータ駆動装置１１の内部のモータ室Ｌと空気室Ｍは完全に遮断される。これによって、動力線１０１の接続箇所である空気室Ｍをインホイールモータ駆動装置１１の内部のモータ室Ｌに飛散している潤滑油から保護することができる。 The partition wall 41 surrounds the outer periphery of the conductive member 31 and is in close contact with the passage 27 and the inner wall surface of the terminal box 22 to completely close the annular space between the inner wall surface of the terminal box 22 and the conductive member 31. Therefore, the motor chamber L and the air chamber M inside the in-wheel motor drive device 11 are completely shut off. As a result, the air chamber M, which is the connection point of the power line 101, can be protected from the lubricating oil scattered in the motor chamber L inside the in-wheel motor drive device 11.
　仕切壁４１の貫通孔４２の内径は、空気室Ｍ側の断面がモータ室Ｌ側の断面よりも大径にされる。そして、貫通孔４２の空気室Ｍ側の内周面と導電部材３１の他端の外周面との間には僅かに開いた環状隙間Ｇが形成される。これに対し、貫通孔４２のモータ室Ｌ側の内周面は、全周に亘り、導電部材３１の一端の外周面と密着し、モータ室Ｌと空気室Ｍを完全に遮断する。また仕切壁４１の外縁につき付言すると、空気室Ｍ側の外縁はモータ室Ｌ側の外縁よりも小さな形状にされる。そして、仕切壁４１の空気室Ｍ側の外縁と端子ボックス２２の内側壁面との間（図４参照）や、仕切壁４１の空気室Ｍ側の外縁とケーシング２１ｂの表面との間（図３参照）には僅かに開いた環状隙間Ｆが形成される。これに対し、仕切壁４１のモータ室Ｌ側の外縁は、全周に亘り、端子ボックス２２の内側壁面ないしケーシング２１ｂの表面と密着する。 The inner diameter of the through hole 42 of the partition wall 41 is such that the cross section on the air chamber M side is larger than the cross section on the motor chamber L side. A slightly open annular gap G is formed between the inner peripheral surface of the through hole 42 on the air chamber M side and the outer peripheral surface of the other end of the conductive member 31. On the other hand, the inner peripheral surface of the through hole 42 on the motor chamber L side is in close contact with the outer peripheral surface of one end of the conductive member 31 over the entire periphery, and completely blocks the motor chamber L and the air chamber M. In addition, as to the outer edge of the partition wall 41, the outer edge on the air chamber M side is made smaller than the outer edge on the motor chamber L side. And between the outer edge of the partition wall 41 on the air chamber M side and the inner wall surface of the terminal box 22 (see FIG. 4), between the outer edge of the partition wall 41 on the air chamber M side and the surface of the casing 21b (FIG. 3). A slightly open annular gap F is formed in the reference). In contrast, the outer edge of the partition wall 41 on the motor chamber L side is in close contact with the inner wall surface of the terminal box 22 or the surface of the casing 21b over the entire circumference.
　あるいは仕切壁４１の変形例として、導電部材３１はケーシング２１ａ，２１ｂに形成されてモータ室Ｌと空気室Ｍを連絡する通路２７に先に挿通され、仕切壁４１は、通路２７の内周面と導電部材３１の外周面との隙間に充填されてその後の化学反応により硬化する樹脂であってもよい。 Alternatively, as a modified example of the partition wall 41, the conductive member 31 is first inserted through a passage 27 formed in the casings 21 a and 21 b and connecting the motor chamber L and the air chamber M, and the partition wall 41 is an inner peripheral surface of the passage 27. And a resin that is filled in a gap between the conductive member 31 and the outer peripheral surface of the conductive member 31 and is cured by a subsequent chemical reaction.
　説明を図３に戻すと、本実施形態は、導電部材３１の外周面を包囲するとともに仕切壁４１に埋設される環状のシール材４３をさらに備える。シール材４３は各導電部材３１の外周に形成された環状溝に設置されるとよい。また本実施形態は、予め成形された仕切壁４１の外周面を包囲するとともに通路２７の内周面と接触する環状のシール材４４をさらに備える。シール材４４はブロック状の仕切壁４１の外周に形成された環状溝に設置されるとよい。これらのシール材４３，４４は、仕切壁４１に埋設されて、導電部材３１と仕切壁４１との間と、仕切壁４１と通路２７との間を完全に閉塞する。これにより端子ボックス２２における密封性が益々向上する。シール材４３，４４は、例えばＯリングである。またシール材４３，４４は、例えばゴム製の環状部材である。 Returning to FIG. 3, the present embodiment further includes an annular sealing material 43 that surrounds the outer peripheral surface of the conductive member 31 and is embedded in the partition wall 41. The sealing material 43 may be installed in an annular groove formed on the outer periphery of each conductive member 31. In addition, the present embodiment further includes an annular sealing material 44 that surrounds the outer peripheral surface of the partition wall 41 that is molded in advance and that contacts the inner peripheral surface of the passage 27. The sealing material 44 is preferably installed in an annular groove formed on the outer periphery of the block-shaped partition wall 41. These sealing materials 43 and 44 are embedded in the partition wall 41 and completely block between the conductive member 31 and the partition wall 41 and between the partition wall 41 and the passage 27. Thereby, the sealing performance in the terminal box 22 is further improved. The sealing materials 43 and 44 are, for example, O-rings. The sealing materials 43 and 44 are rubber annular members, for example.
　次に図５を参照して、端子ボックス２２と信号線１０５の接続構造につき説明する。信号線１０５の接続構造につき、動力線１０１の接続構造と共通する部品には同一の符号を付す。信号線１０５は、複数の細い芯線を束ねたケーブルであり、インバータ１２１（図１参照）から延びている。そして信号線１０５の先端は、環状の固定リング１０６，１０７に通されて、さらに端子ボックス２２の一部に形成された貫通孔２３に通され、端子ボックス２２の内部に差し込まれる。なお貫通孔２３の内周面には雌ねじが形成され、固定リング１０７の一方端の外周面が螺合することによって取付固定されている。そして固定リング１０６を固定リング１０７の他方端に螺合させることにより、信号線１０５の外皮を固定リング１０６，１０７に支持固定する。そして固定リング１０６，１０７は端子ボックス２２の外方から貫通孔２３を経由して第２の空気室Ｍに異物が侵入することを防止する。 Next, the connection structure between the terminal box 22 and the signal line 105 will be described with reference to FIG. Regarding the connection structure of the signal line 105, the same reference numerals are given to components common to the connection structure of the power line 101. The signal line 105 is a cable in which a plurality of thin core wires are bundled, and extends from the inverter 121 (see FIG. 1). The tip of the signal line 105 is passed through the annular fixing rings 106 and 107, and further passed through the through hole 23 formed in a part of the terminal box 22, and inserted into the terminal box 22. An internal thread is formed on the inner peripheral surface of the through-hole 23, and the outer peripheral surface at one end of the fixing ring 107 is fixed by being screwed. Then, the outer ring of the signal line 105 is supported and fixed to the fixing rings 106 and 107 by screwing the fixing ring 106 to the other end of the fixing ring 107. The fixing rings 106 and 107 prevent foreign matter from entering the second air chamber M from the outside of the terminal box 22 via the through hole 23.
　図５に示すように、端子ボックス２２の内部になる第２の空気室Ｍには、箱状のコネクター３４が配置される。コネクター３４の一端面は信号線１０５の先端と接続する。コネクター３４の他端面は、モータ室Ｌから延びる信号導線３５の一端と接続する。コネクター３４は、その他端面側に壁状の基部３４ｂを有する。基部３４ｂはボルト４６によって端子ボックス２２に取付固定される。また壁状の基部３４ｂは、第２の仕切壁４１に沿って配置され、空気室Ｍとモータ室Ｌとを遮断する。 As shown in FIG. 5, a box-shaped connector 34 is disposed in the second air chamber M that is inside the terminal box 22. One end surface of the connector 34 is connected to the tip of the signal line 105. The other end surface of the connector 34 is connected to one end of a signal conducting wire 35 extending from the motor chamber L. The connector 34 has a wall-shaped base 34b on the other end face side. The base 34 b is attached and fixed to the terminal box 22 by bolts 46. The wall-shaped base portion 34 b is disposed along the second partition wall 41 and blocks the air chamber M and the motor chamber L.
　信号導線３５は、モータ室Ｌから第２の空気室Ｍへ延びて第２の仕切壁４１および壁状の基部３４ｂを貫通する第２の導電部材である。信号導線３５の一端がコネクター３４の背面と接続する。信号導線３５の他端は、インホイールモータ駆動装置１１の内部に設置された回転角度センサ４９（図３参照）と接続する。回転角度センサ４９は、モータ軸１４ａの回転角度を検出し、当該回転角度に対応する信号を、インバータ１２１に出力する。フロック状の仕切壁４１は、ボルト４５によって端子ボックス２２に取付固定される。 The signal conducting wire 35 is a second conductive member that extends from the motor chamber L to the second air chamber M and penetrates the second partition wall 41 and the wall-shaped base 34b. One end of the signal conductor 35 is connected to the back surface of the connector 34. The other end of the signal conducting wire 35 is connected to a rotation angle sensor 49 (see FIG. 3) installed inside the in-wheel motor drive device 11. The rotation angle sensor 49 detects the rotation angle of the motor shaft 14 a and outputs a signal corresponding to the rotation angle to the inverter 121. The flock-shaped partition wall 41 is attached and fixed to the terminal box 22 by bolts 45.
　本実施形態のインホイールモータ駆動装置１１は、図５に示すように、インホイールモータ駆動装置１１の外方から延びる信号線１０５の先端が差し込まれる第２の空気室Ｍと、モータ室Ｌと第２空気室Ｍとを仕切る非導電性の第２の仕切壁４１と、第２の仕切壁４１を横断して延びる導電体であって、一端がモータ室Ｌに配置されて回転角度センサ４９と接続し、他端が第２の空気室Ｍに配置されて信号線１０５の先端と接続する信号導線３５とをさらに備える。これにより仕切壁４１は信号導線３５の外周を包囲するとともに端子ボックス２２の内壁面に密着して、端子ボックス２２の内壁面と信号導線３５の外周との間の環状空間を完全に閉塞する。したがってモータ室Ｌと空気室Ｍは完全に遮断される。加えて壁状の基部３４ｂによっても、モータ室Ｌと空気室Ｍは完全に遮断される。なお第２の空気室Ｍは、図３に示す動力線１０１の空気室Ｍと連通してもよいし、あるいは隔てられていてもよい。 As shown in FIG. 5, the in-wheel motor drive device 11 of the present embodiment includes a second air chamber M into which a tip of a signal line 105 extending from the outside of the in-wheel motor drive device 11 is inserted, a motor chamber L, A non-conductive second partition wall 41 that partitions the second air chamber M, and a conductor that extends across the second partition wall 41, one end of which is disposed in the motor chamber L and the rotation angle sensor 49 And a signal conducting wire 35 having the other end arranged in the second air chamber M and connected to the tip of the signal line 105. Thus, the partition wall 41 surrounds the outer periphery of the signal conducting wire 35 and is in close contact with the inner wall surface of the terminal box 22, thereby completely closing the annular space between the inner wall surface of the terminal box 22 and the outer periphery of the signal conducting wire 35. Therefore, the motor chamber L and the air chamber M are completely shut off. In addition, the motor chamber L and the air chamber M are completely blocked by the wall-shaped base 34b. The second air chamber M may be in communication with or separated from the air chamber M of the power line 101 shown in FIG.
　次に本発明の他の実施形態を説明する。図６は本発明の他の実施形態を示す縦断面図であり、図７は、図６のＶＩＩ‐ＶＩＩで切断し、矢印の向きにみた状態を示す断面図である。図８は、図７を紙上において手前に少し倒して傾けた方向からみた端子ボックスの外観図である。図６～図８に示す他の実施形態は、上述した図１～図４に示す実施形態と基本的には同じであり、各部材の形状および向きが異なる。そこで上述した実施形態と共通する構成については同一の符号を付して説明を省略し、異なる構成について以下に説明する。他の実施形態では図７および図８に示すように、端子ボックス２２と各動力線１０１の接続箇所を雁行型に配列する。そして動力線１０１からさらに延びる先端金属端子１０２と導電部材３１とを９０度交差させて接続する。 Next, another embodiment of the present invention will be described. FIG. 6 is a longitudinal sectional view showing another embodiment of the present invention, and FIG. 7 is a sectional view taken along the line VII-VII in FIG. 6 and viewed in the direction of the arrow. FIG. 8 is an external view of the terminal box as seen from the direction in which FIG. 7 is tilted slightly forward on the paper. The other embodiments shown in FIGS. 6 to 8 are basically the same as the embodiments shown in FIGS. 1 to 4 described above, and the shape and orientation of each member are different. Therefore, configurations common to the above-described embodiment are denoted by the same reference numerals, description thereof is omitted, and different configurations are described below. In other embodiments, as shown in FIG. 7 and FIG. 8, the connection points of the terminal box 22 and the power lines 101 are arranged in a lame manner. Then, the tip end metal terminal 102 further extending from the power line 101 and the conductive member 31 are connected so as to intersect 90 degrees.
　このため、図７に示すように通路２７はＬ字状に延びる。また導電部材３１として長さの異なる３本を用いる。また隣り合って平行に延びる導電部材３１，３１間には、絶縁体としてのインシュレータ４７をそれぞれ介挿する。 Therefore, the passage 27 extends in an L shape as shown in FIG. Three conductive members 31 having different lengths are used. Further, an insulator 47 as an insulator is interposed between the conductive members 31 and 31 that are adjacent and extend in parallel.
　図８に示すように、雁行型に配設された各貫通孔２３には板状のブラケット２４を個々に設ける。このため、端子ボックス２２には、ブラケット２４を取付固定するために、端子ボックス２２の外壁面から***する形状の３個の支持部２２ｂを設け、各支持部２２ｂには雌ねじ孔２２ｍを形成する（図６参照）。各雌ねじ孔２２ｍには、ブラケット２４を取付固定するためのボルト２４ｂが螺合する。図６～図８に示すように、仕切壁４１は互いに長さの異なる導電部材３１に対しても適用可能であることが理解される。 As shown in FIG. 8, a plate-like bracket 24 is individually provided in each through-hole 23 arranged in a laminating manner. For this reason, in order to attach and fix the bracket 24 to the terminal box 22, three support portions 22b having a shape protruding from the outer wall surface of the terminal box 22 are provided, and female screw holes 22m are formed in each support portion 22b. (See FIG. 6). A bolt 24b for mounting and fixing the bracket 24 is screwed into each female screw hole 22m. As shown in FIGS. 6 to 8, it is understood that the partition wall 41 can be applied to the conductive members 31 having different lengths.
　また、前記の実施形態においては、モータ部１１Ａにケーシング２２ｂに固定されるステータ１３と、ステータ１３の内側に径方向の隙間を空けて対面する位置に配置されるロータ１２とを備えるラジアルギャップモータを採用した例を示したが、これに限ることなく、任意の構成のモータを適用可能である。例えばステータとロータとが軸方向に開いた隙間を介して対向配置されるアキシアルギャップモータであってもよい。モータ部１１Ａに採用されるモータは埋込磁石型同期モータ（ずなわちＩＰＭモータ）がよい。 In the above-described embodiment, the radial gap motor is provided with the stator 13 fixed to the casing 22b on the motor part 11A and the rotor 12 arranged at a position facing the inner side of the stator 13 with a radial gap. Although the example which employ | adopted was shown, the motor of arbitrary structures is applicable not only to this but. For example, an axial gap motor in which the stator and the rotor are arranged to face each other via a gap opened in the axial direction may be used. The motor employed in the motor unit 11A is preferably an embedded magnet type synchronous motor (that is, an IPM motor).
　さらに、この発明に係るインホイールモータ駆動装置１１においては、サイクロイド式の減速機を採用した例を示したが、これに限ることなく、遊星減速機、２軸並行減速機、その他の減速機を適用可能であり、また、減速機を採用しない、所謂ダイレクトモータタイプであってもよい。 Furthermore, in the in-wheel motor drive device 11 which concerns on this invention, although the example which employ | adopted the cycloid type reduction gear was shown, not only this but a planetary reduction gear, a 2 axis | shaft parallel reduction gear, and other reduction gears are shown. It may be applicable and may be a so-called direct motor type that does not employ a reduction gear.
　以上、図面を参照してこの発明の実施の形態を説明したが、この発明は、図示した実施の形態のものに限定されない。図示した実施の形態に対して、この発明と同一の範囲内において、あるいは均等の範囲内において、種々の修正や変形を加えることが可能である。 The embodiment of the present invention has been described above with reference to the drawings, but the present invention is not limited to the illustrated embodiment. Various modifications and variations can be made to the illustrated embodiment within the same range or equivalent range as the present invention.
　この発明になるインホイールモータ駆動装置は、電気自動車およびハイブリッド車両において有利に利用される。 The in-wheel motor drive device according to the present invention is advantageously used in electric vehicles and hybrid vehicles.
　１１　インホイールモータ駆動装置、　１１Ａ　モータ部、　１１Ｂ　減速部、　　　１１Ｃ　ハブ部、　１２ロータ、　１３　ステータ、　１４ａ　モータ軸、　　　１５，１６　軸受、　１７　モータコイル、　１８，　導線、　１９　金属端子、　　　２１ａ，２１ｂ　ケーシング、　２２　端子ボックス、　２２ｂ　支持部、　　　２２ｍ　雌ねじ孔、　２３　貫通孔、　２４　ブラケット、　２５　カバー、　　　２６　シール材、　２７　通路、　３１　導電部材、　３１ｆ　フランジ部、　　　３２，３３　ボルト、　４１　仕切壁、　４２　貫通孔、　４３，４４　シール材、　４７　インシュレータ、　１０１　動力線、　１０２　先端金属端子、　　　１０３　カラー、　１０５　信号線、　１０６，１０７　固定リング、　１１１　車輪、　１１２　ロードホイール、　１１３　トレーリングアーム、　１２１　インバータ、　Ｇ　環状隙間、　Ｌ　モータ室、　Ｍ　空気室、　Ｓ　内空領域。 11 In-wheel motor drive unit, 11A motor part, 11B deceleration part, 11C hub part, 12 rotor, 13 stator, 14a motor shaft, 15, 16 bearing, 17 motor coil, 18, conductor, 19 metal terminal, 21a, 21b casing , 22 terminal box, 22b support part, 22m female screw hole, 23 through hole, 24 bracket, 25 cover, 26 seal material, 27 passage, 31 conductive member, 31f flange part, 32, 33 bolt, 41 partition wall, 42 through hole 43, 44 seal material, 47 insulator, 101 power line, 102 tip metal terminal, 103 collar, 105 signal line, 106, 107 fixed Grayed, 111 wheels, 112 road wheel, 113 trailing arms, 121 inverter, G annular gap, L motor chamber, M air chamber, S in an empty area.

Claims (4)

  1. 　潤滑油によって潤滑されるインホイールモータ駆動装置内部と、
    　インホイールモータ駆動装置の外方から延びる動力線の先端が差し込まれる空気室と、
    　前記インホイールモータ駆動装置内部と前記空気室とを仕切る非導電性の仕切壁と、
    　前記仕切壁を横断して延びる導電体であって、一端が前記インホイールモータ駆動装置内部に配置されてモータコイルと接続し、他端が前記空気室に配置されて前記動力線の先端と接続する導電部材とを備える、インホイールモータ駆動装置。     Inside the in-wheel motor drive device lubricated by the lubricating oil;
    An air chamber into which the tip of a power line extending from the outside of the in-wheel motor drive device is inserted;
    A non-conductive partition wall that partitions the interior of the in-wheel motor drive device and the air chamber;
    A conductor extending across the partition wall, one end of which is disposed inside the in-wheel motor drive device and connected to the motor coil, and the other end is disposed in the air chamber and connected to the tip of the power line An in-wheel motor drive device comprising a conductive member.
  2. 　前記インホイールモータ駆動装置内部および前記空気室は、インホイールモータ駆動装置のケーシングによってそれぞれ画成され、
    　前記導電部材は、前記ケーシングに形成されて前記インホイールモータ駆動装置内部と前記空気室を連絡する通路に挿通され、
    　前記非導電性の仕切壁は、前記通路の内周面と前記導電部材の外周面との隙間に充填される樹脂である、請求項１に記載のインホイールモータ駆動装置。     The inside of the in-wheel motor driving device and the air chamber are respectively defined by a casing of the in-wheel motor driving device,
    The conductive member is inserted in a passage formed in the casing and connecting the inside of the in-wheel motor driving device and the air chamber,
    The in-wheel motor drive device according to claim 1, wherein the non-conductive partition wall is a resin filled in a gap between an inner peripheral surface of the passage and an outer peripheral surface of the conductive member.
  3. 　前記導電部材の外周面を包囲するとともに前記仕切壁に埋設される環状のシール材をさらに備える、請求項１または２に記載のインホイールモータ駆動装置。 The in-wheel motor drive device according to claim 1 or 2, further comprising an annular sealing material that surrounds the outer peripheral surface of the conductive member and is embedded in the partition wall.
  4. 　インホイールモータ駆動装置の外方から延びる信号線の先端が差し込まれる第２の空気室と、
    　前記インホイールモータ駆動装置内部と前記第２空気室とを仕切る非導電性の第２の仕切壁と、
    　前記第２仕切壁を横断して延びる導電体であって、一端が前記インホイールモータ駆動装置内部に配置されてセンサと接続し、他端が前記第２空気室に配置されて前記信号線の先端と接続する第２の導電部材とをさらに備える、請求項１～３のいずれかに記載のインホイールモータ駆動装置。     A second air chamber into which the tip of a signal line extending from the outside of the in-wheel motor drive device is inserted;
    A non-conductive second partition wall that partitions the inside of the in-wheel motor drive device and the second air chamber;
    A conductor extending across the second partition wall, one end of which is disposed inside the in-wheel motor drive device and connected to the sensor, and the other end is disposed in the second air chamber and is connected to the signal line. The in-wheel motor drive device according to any one of claims 1 to 3, further comprising a second conductive member connected to the tip.
PCT/JP2015/052488 2014-02-27 2015-01-29 In-wheel motor drive device WO2015129380A1 (en)

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JP6826383B2 (en) * 2016-06-27 2021-02-03 Ntn株式会社 In-wheel motor drive
JP6903534B2 (en) * 2017-09-21 2021-07-14 Ntn株式会社 In-wheel motor drive
JP7371390B2 (en) * 2019-08-09 2023-10-31 三菱自動車工業株式会社 vehicle drive system
JP7417064B2 (en) * 2020-01-08 2024-01-18 日本製鉄株式会社 Structure
JPWO2023026588A1 (en) * 2021-08-26 2023-03-02

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