WO2012093552A1 - Dispositif d'entraînement de moteur dans une roue - Google Patents

Dispositif d'entraînement de moteur dans une roue Download PDF

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Publication number
WO2012093552A1
WO2012093552A1 PCT/JP2011/078505 JP2011078505W WO2012093552A1 WO 2012093552 A1 WO2012093552 A1 WO 2012093552A1 JP 2011078505 W JP2011078505 W JP 2011078505W WO 2012093552 A1 WO2012093552 A1 WO 2012093552A1
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WO
WIPO (PCT)
Prior art keywords
drive device
wheel
housing
motor drive
wheel motor
Prior art date
Application number
PCT/JP2011/078505
Other languages
English (en)
Japanese (ja)
Inventor
山本　哲也
Original Assignee
Ntn株式会社
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
Priority claimed from JP2011000039A external-priority patent/JP5778428B2/ja
Priority claimed from JP2011041598A external-priority patent/JP2012176715A/ja
Application filed by Ntn株式会社 filed Critical Ntn株式会社
Publication of WO2012093552A1 publication Critical patent/WO2012093552A1/fr

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K17/00—Arrangement or mounting of transmissions in vehicles
    • B60K17/04—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing
    • B60K17/043—Transmission unit disposed in on near the vehicle wheel, or between the differential gear unit and the wheel
    • B60K17/046—Transmission unit disposed in on near the vehicle wheel, or between the differential gear unit and the wheel with planetary gearing having orbital motion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K7/00—Disposition of motor in, or adjacent to, traction wheel
    • B60K7/0007—Disposition of motor in, or adjacent to, traction wheel the motor being electric
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
    • F16C19/14—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load
    • F16C19/18—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls
    • F16C19/181—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact
    • F16C19/183—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles
    • F16C19/184—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles in O-arrangement
    • F16C19/186—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles in O-arrangement with three raceways provided integrally on parts other than race rings, e.g. third generation hubs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
    • F16C35/04—Rigid support of bearing units; Housings, e.g. caps, covers in the case of ball or roller bearings
    • F16C35/06—Mounting or dismounting of ball or roller bearings; Fixing them onto shaft or in housing
    • F16C35/067—Fixing them in a housing
    • 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
    • B60K1/00—Arrangement or mounting of electrical propulsion units
    • B60K2001/003—Arrangement or mounting of electrical propulsion units with means for cooling the electrical propulsion units
    • B60K2001/006—Arrangement or mounting of electrical propulsion units with means for cooling the electrical propulsion units the electric motors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K7/00—Disposition of motor in, or adjacent to, traction wheel
    • B60K2007/0038—Disposition of motor in, or adjacent to, traction wheel the motor moving together with the wheel axle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K7/00—Disposition of motor in, or adjacent to, traction wheel
    • B60K2007/0092—Disposition of motor in, or adjacent to, traction wheel the motor axle being coaxial to the wheel axle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2326/00—Articles relating to transporting
    • F16C2326/01—Parts of vehicles in general
    • F16C2326/02—Wheel hubs or castors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H1/00—Toothed gearings for conveying rotary motion
    • F16H1/28—Toothed gearings for conveying rotary motion with gears having orbital motion
    • F16H1/32—Toothed gearings for conveying rotary motion with gears having orbital motion in which the central axis of the gearing lies inside the periphery of an orbital gear
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
    • H02K5/203—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium specially adapted for liquids, e.g. cooling jackets
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
    • H02K7/116—Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/64—Electric machine technologies in electromobility

Definitions

  • This invention relates to an in-wheel motor drive device.
  • Patent Document 1 Japanese Patent Application Laid-Open No. 2008-132941
  • Patent Document 2 Japanese Patent Application Laid-Open No. 2007-99106
  • An in-wheel motor drive device 101 shown in FIG. 16 includes a motor unit 103 that rotationally drives the motor-side rotation member 106, a reduction unit 105 that decelerates the rotation of the motor-side rotation member 106 and transmits the rotation to the wheel-side rotation member 108. And a wheel hub bearing portion 104 having a wheel hub 109 fixedly connected to the wheel side rotating member 108.
  • the in-wheel motor drive device needs to be fastened to the suspension part of the vehicle body or the fixing member on the vehicle body side by some method.
  • the in-wheel motor drive device 101 having the above-described configuration needs to fasten the fixing member of the motor unit 103 or the speed reduction unit 105 and the fixed member of the wheel hub bearing unit 104 or a member integrally coupled to the fixed wheel by some method. There is.
  • the in-wheel motor drive device 101 having the above-described configuration needs to fasten the housing 110 of the motor unit 103 or the speed reduction unit 105 and the suspension unit 111 on the vehicle body side by some method.
  • the upper suspension part 111 on the vehicle body side and the housing 110 of the speed reduction part 105 are fastened with bolts 112
  • the lower suspension part 112 on the car body side and the housing 110 of the speed reduction part 105 are fastened with bolts 114. ing.
  • the fixed wheel 102 (fixed side member) of the wheel hub bearing portion 104 and the housing 107 of the speed reduction portion 105 are fastened with bolts 110.
  • the housing of the motor unit 103 and the speed reduction unit 105 and the member on the vehicle body side or the fixed wheel of the wheel hub bearing unit 104 by some method.
  • the housing 107 of the motor unit 103 and the speed reduction unit 105 is usually formed of an aluminum alloy for weight reduction. Therefore, from the viewpoint of securing strength, screws for fastening the bolts It is necessary to set the hole longer than steel.
  • the bolt fastening portion is set to be relatively long, and is thicker than the other wall portions.
  • the present invention is sufficient even if the motor part or the speed reduction part housing of the in-wheel motor drive device formed of a light metal such as an aluminum alloy and the vehicle body side fixing member or the wheel hub bearing part are bolted.
  • the object is to obtain durability and to minimize the thickness of the bolt fastening portion.
  • the present invention has a driving device for generating a driving force of a wheel in the wheel, the housing of the driving device is made of light metal, and the housing and a fixing member on the vehicle body side
  • a male member or a female member that constitutes the bolt fastening member is formed of an iron material, and one of the male member or the female member is disposed in the housing.
  • the present invention has a drive device for generating wheel drive force in the wheel, and the housing of the drive device is made of light metal, and is integrated with the fixed wheel or fixed wheel of the wheel hub bearing portion.
  • a male member or a female member constituting the bolt fastening member is formed of an iron material, and one of the male member or the female member is formed on the housing. It is arranged.
  • the male member or female member formed of the iron material is preferably inserted by casting when the housing is cast.
  • Aluminum alloy can be used as the casting material of the housing.
  • a male member or a female member arranged in the housing is provided with a retaining means or a rotation preventing means for the housing so that the male member or the female member does not come out or rotate together when the bolt is fastened.
  • the male member or female member disposed in the housing may be formed as a ring-shaped member integrated in the circumferential direction.
  • the ring-shaped member can be a casting or a pressed product.
  • the thread portion formed on the male member or the female member may be processed before casting or may be processed after casting.
  • the female member can be composed of a nut, particularly a cap nut.
  • the male member can be composed of a bolt.
  • the bolt may be formed by casting a shaft member in the housing and then screwing it.
  • a sealing member for internal oil sealing may be disposed in a housing on the inner diameter side of the circumferential position where the male member or the female member is disposed.
  • O-ring can be used as the sealing member.
  • the male member or the female member made of the iron material constituting the bolt fastening member is arranged in the light metal housing as described above, the durability at the time of bolt fastening is good, and the bolt fastening The thickness of the part can also be minimized.
  • FIG. 4 is an enlarged view of a bolt fastening portion in FIG. 3. It is a front view of the female member which comprises the bolt fastening member cast in the housing of FIG. 1 or FIG. It is a vertical side view of FIG. 5A. It is an enlarged view of the bolt fastening part of the in-wheel motor drive which concerns on other embodiment of this invention. It is a longitudinal cross-sectional view of the ring member which integrated the female member which comprises the bolt fastening member of FIG.
  • FIG. 6 It is a longitudinal cross-sectional view of the ring member which integrated the female member which comprises the bolt fastening member of FIG. 4 in the circumferential direction. It is a longitudinal cross-sectional view of FIG. 8A. It is an enlarged view of the bolt fastening part of embodiment which uses a cap nut as a female member which comprises the bolt fastening member cast by the housing. It is an enlarged view of the bolt fastening part of embodiment which uses a cap nut as a female member which comprises the bolt fastening member cast by the housing. It is an enlarged view of the bolt fastening part of embodiment using a bolt as a male member which constitutes a bolt fastening member cast into a housing.
  • FIG. 4 is a schematic plan view of an electric vehicle having the in-wheel motor drive device of FIG. 1 or 3. It is the figure seen from the electric vehicle back of FIG. It is a schematic sectional drawing of the conventional in-wheel motor drive device. It is an enlarged view of the conventional bolt fastening part.
  • an electric vehicle 11 having an in-wheel motor drive device includes a chassis 12, a front wheel 13 as a steering wheel, a rear wheel 14 as a drive wheel, And an in-wheel motor drive device 21 that transmits a driving force to each of the rear wheels 14.
  • the rear wheel 14 is accommodated in a wheel housing 12a of the chassis 12, and is fixed to the lower portion of the chassis 12 via a suspension device (suspension) 12b.
  • the suspension device 12b supports the rear wheel 14 by a suspension arm that extends to the left and right, and suppresses vibration of the chassis 12 by absorbing vibration received by the rear wheel 14 from the ground by a strut including a coil spring and a shock absorber. Furthermore, a stabilizer that suppresses the inclination of the vehicle body when turning is provided at the connecting portion of the left and right suspension arms.
  • the suspension device 12b is an independent suspension type in which the left and right wheels can be moved up and down independently in order to improve the followability to the road surface unevenness and efficiently transmit the driving force of the driving wheels to the road surface. Is desirable.
  • the electric vehicle 11 needs to be provided with a motor, a drive shaft, a differential gear mechanism, and the like on the chassis 12 by providing an in-wheel motor drive device 21 for driving the left and right rear wheels 14 inside the wheel housing 12a. This eliminates the need to secure a wide cabin space and control the rotation of the left and right drive wheels.
  • the in-wheel motor drive device 21 is required to be smaller and lighter.
  • the in-wheel motor drive device 21 includes a motor unit A that generates a driving force, a deceleration unit B that decelerates and outputs the rotation of the motor unit A, and an output from the deceleration unit B.
  • the motor hub A and the speed reduction part B are housed in the motor part housing 22a and the speed reduction part housing 22b, and the wheel of the electric vehicle 11 as shown in FIG. Mounted in the housing 12a.
  • the motor part A includes a stator 23 fixed to the motor part housing 22a, a rotor 24 arranged at a position facing the inner side of the stator 23 with a radial gap, and a rotor 24 fixedly connected to the inner side of the rotor 24.
  • 24 is a radial gap motor including a motor-side rotating member 25 that rotates integrally with the motor 24.
  • the rotor 24 includes a flange-shaped rotor portion 24a and a cylindrical hollow portion 24b, and is rotatably supported with respect to the motor portion housing 22a by rolling bearings 36a and 36b.
  • the motor-side rotating member 25 is arranged from the motor part A to the speed reduction part B in order to transmit the driving force of the motor part A to the speed reduction part B, and has eccentric parts 25a and 25b in the speed reduction part B.
  • the motor-side rotating member 25 is fitted and fixed to the hollow portion 24 b of the rotor 24 and rotates integrally with the rotor 24. Further, the two eccentric portions 25a and 25b are provided with a 180 ° phase change in order to cancel out the centrifugal force due to the eccentric motion.
  • the speed reduction part B is held at fixed positions on the curved plates 26a and 26b as revolving members that are rotatably held by the eccentric parts 25a and 25b and the speed reduction part housing 22b.
  • the speed reduction part B is provided with a speed reduction part lubrication mechanism that supplies lubricating oil to the speed reduction part B.
  • the wheel side rotation member 28 has a flange portion 28a and a shaft portion 28b. Holes for fixing the inner pins 31 are formed on the end face of the flange portion 28a at equal intervals on the circumference around the rotation axis of the wheel side rotation member 28. Further, the shaft portion 28 b is fitted and fixed to the hub wheel 32 and transmits the output of the speed reduction portion B to the wheel 14.
  • the flange portion 28a of the wheel side rotation member 28 and the motor side rotation member 25 are rotatably supported by a rolling bearing 36c.
  • the curved plates 26 a and 26 b have a plurality of corrugations composed of trochoidal curves such as epitrochoids on the outer periphery, and a plurality of through holes 30 a penetrating from one end face to the other end face.
  • a plurality of through holes 30a are provided at equal intervals on the circumference centering on the rotation axis of the curved plates 26a, 26b, and receive inner pins 31 described later.
  • the through hole 30b is provided at the center of the curved plates 26a and 26b and is fitted to the eccentric portions 25a and 25b.
  • the curved plates 26a and 26b are supported by the rolling bearing 41 so as to be rotatable with respect to the eccentric portions 25a and 25b.
  • the rolling bearing 41 is directly formed on the inner ring member having an inner raceway surface on the outer diameter surface of the eccentric portions 25a and 25b and the inner diameter surface of the through hole 30b of the curved plates 26a and 26b.
  • a cylindrical roller bearing comprising an outer raceway surface, a plurality of cylindrical rollers 44 disposed between the inner raceway surface and the outer raceway surface, and a retainer (not shown) that holds the spacing between adjacent cylindrical rollers 44. .
  • the outer pins 27 are provided at equal intervals on a circumferential track centering on the rotation axis of the motor side rotation member 25.
  • the curved waveform and the outer pin 27 engage with each other to cause the curved plates 26a and 26b to rotate.
  • the outer pin 27 is rotatably supported with respect to the speed reduction unit housing 22b by a needle roller bearing. Thereby, the contact resistance between the curved plates 26a and 26b can be reduced.
  • the counterweight 29 has a disc shape and has a through-hole that fits with the motor-side rotation member 25 at a position off the center, in order to cancel out the unbalanced inertia couple caused by the rotation of the curved plates 26a and 26b. It is arranged at a position adjacent to each eccentric part 25a, 25b with a 180 ° phase change from the eccentric part.
  • the motion conversion mechanism includes a plurality of inner pins 31 held by the wheel-side rotating member 28 and through holes 30a provided in the curved plates 26a and 26b.
  • the inner pins 31 are provided at equal intervals on a circumferential track centering on the rotational axis of the wheel side rotation member 28, and one axial end thereof is fixed to the wheel side rotation member 28.
  • needle roller bearings are provided at positions where they contact the inner wall surfaces of the through holes 30a of the curved plates 26a and 26b.
  • the through hole 30a is provided at a position corresponding to each of the plurality of inner pins 31, and the inner diameter dimension of the through hole 30a indicates the outer diameter dimension of the inner pin 31 ("maximum outer diameter including needle roller bearing"). It is set larger by a predetermined amount than the same).
  • the speed reduction unit lubrication mechanism supplies lubricating oil to the speed reduction unit B, and includes a lubricating oil passage 25c, a lubricating oil supply port 25d, a lubricating oil discharge port 22c, a lubricating oil storage unit 22d, and a rotary pump 51. And a circulating oil passage 22g.
  • the lubricating oil passage 25c extends along the axial direction inside the motor-side rotating member 25.
  • the lubricating oil supply port 25d extends from the lubricating oil passage 25c toward the outer diameter surface of the motor-side rotating member 25.
  • the lubricating oil supply port 25d is provided in the eccentric portions 25a and 25b.
  • At least one position of the speed reduction part housing 22b at the position of the speed reduction part B is provided with a lubricating oil discharge port 22c for discharging the lubricating oil inside the speed reduction part B.
  • a circulating oil passage 22g that connects the lubricating oil discharge port 22c and the lubricating oil passage 25c is provided in the motor portion housing 22a. Then, the lubricating oil discharged from the lubricating oil discharge port 22c returns to the lubricating oil path 25c via the circulating oil path 22g.
  • the speed reduction unit lubrication mechanism further includes a cooling means for cooling the lubricating oil passing through the circulating oil passage 22g.
  • the cooling means in this embodiment includes a cooling water passage 22e provided in the motor part housing 22b, and the cooling means contributes not only to lubricating oil but also to the cooling of the motor part A.
  • the wheel hub bearing portion C includes a hub wheel 32 to which the wheel 14 fixedly connected to the wheel side rotation member 28 is attached, and a fixed wheel 33 that rotatably holds the hub wheel 32 with respect to the speed reduction unit housing 22b.
  • the hub wheel 32 has a cylindrical hollow portion 32a and a flange portion 32b.
  • the wheel 14 is fixedly connected to the flange portion 32b by a bolt 32c.
  • a spline and a male screw are formed on the outer diameter surface of the shaft portion 28b of the wheel side rotation member 28.
  • a spline hole is formed in the inner diameter surface of the hollow portion 32 a of the hub wheel 32. Then, the wheel-side rotating member 28 is screwed to the inner diameter surface of the hub wheel 32, and both ends are fastened by fastening the tip with a nut 32d.
  • the hub wheel 32 has a wheel mounting flange 32b integrally formed on the outer surface of the hollow portion 32a.
  • An outer raceway surface is integrally formed on the outer diameter surface of the hollow portion 32a on the outer side of the vehicle, and an inner ring 32c having an inner raceway surface on the outer surface is fitted to the outer diameter surface of the hollow portion 32a on the inner side of the vehicle. is doing.
  • the fixed ring 33 has an outer raceway surface and an inner raceway surface facing the outer raceway surface and the inner raceway surface of the hub ring 32 on the inner peripheral surface, and a fixing flange 33a on the outer peripheral surface.
  • a double-row ball 34 is accommodated between the outer raceway surface and the inner raceway surface of the hub wheel 32 and the fixed ring 33 facing each other.
  • the fixing flange 33 a of the fixed wheel 33 and the speed reduction unit housing 22 b are fastened by a bolt 37.
  • the deceleration part housing 22b is bolted to the fixing member 70 on the vehicle body side of the suspension device 12b.
  • the fixing member 70 on the vehicle body side is provided at each of an upper part and a lower part of the suspension device 12b.
  • the bolt fastening member is constituted by a male member 61 and a female member 62 formed of an iron material.
  • a bolt is adopted as the male member 61, and the bolt is formed on the fixing member 70.
  • the bolt is inserted into the bolt insertion hole, and the end of the bolt is screwed into the female member 62 disposed in the speed reduction portion housing 22b, thereby fastening the fixing member 70 and the speed reduction portion housing 22b.
  • a bolt is adopted as the male member 61, the bolt is inserted into a bolt insertion hole formed in the fixing flange 33a, and the end of the bolt is arranged in the speed reduction portion housing 22b.
  • the fixing member 33 is screwed into the female member 62 to fasten the fixing flange 33a and the speed reduction unit housing 22b.
  • the female member 62 employed in the embodiment of FIGS. 1, 2, 3, and 4 includes a cylindrical portion 62 a having a screw hole and an outer periphery of an end portion of the cylindrical portion 62 a.
  • the speed reduction part housing 22b is cast from an aluminum alloy, it is inserted into the speed reduction part housing 22b by casting.
  • the female member 62 shown in FIGS. 5A and 5B has a flange portion 62b on the outer periphery of the end portion of the cylindrical portion 62a so as not to be pulled out in the axial direction when the bolt is fastened. Further, the outer shape of the cylindrical portion 62a of the female member 62 is not a simple cylinder but a D shape so as not to rotate together when the bolt is fastened.
  • a petal shape or an elliptical shape can be used as a means for preventing rotation when fastening the bolt.
  • the outer shape may be knurled, or a step may be provided in the axial direction as a retaining means when fastening the bolt.
  • the female member 62 may be arranged on the speed reduction unit housing 22b in the same number as the bolts corresponding to the number of bolts. However, as shown in FIGS. 6, 7, 8A, and 8B, The member 63 may be inserted into the speed reducer housing 22 b and the screw hole 64 may be formed in the ring member 63.
  • the rigidity of the housing 22b is increased, and the change in the internal clearance when a load is applied can be suppressed to a small level. .
  • portions other than the screw holes 64 be thin portions 65 in order to reduce the weight.
  • FIGS. 9 and 10 is an example in which an iron cap nut is used as the female member 62.
  • an iron bolt is used as the male member 61, the head of this bolt is inserted into the speed reduction unit housing 22 b, and a nut as the female member 62 is disposed on the fixing member 70. Show.
  • a shaft member that is not threaded may be inserted at the time of casting, and the shaft member may be threaded after the insertion.
  • an iron bolt is used as the male member 61, the head of this bolt is inserted into the speed reduction unit housing 22 b, and the nut as the female member 62 is fixed to the fixing flange 33 a of the fixed ring 33.
  • An example of arrangement is shown in FIG.
  • fastening bolts are arranged to improve the sealing performance of the abutting surface between the fixing flange 33a of the fixed ring 33 and the speed reduction unit housing 22b and prevent oil leakage from the inside.
  • a seal member 66 is disposed on the inner diameter side of the circumferential position. An O-ring can be used as the seal member 66.
  • the motor unit A receives, for example, an electromagnetic force generated by supplying an alternating current to the coil of the stator 23, and the rotor 24 composed of a permanent magnet or a magnetic material rotates.
  • the motor side rotation member 25 connected to the rotor 24 rotates
  • the curved plates 26 a and 26 b revolve around the rotation axis of the motor side rotation member 25.
  • the outer pin 27 engages with the curved waveform of the curved plates 26 a and 26 b to cause the curved plates 26 a and 26 b to rotate in the direction opposite to the rotation of the motor-side rotating member 25.
  • the inner pin 31 inserted through the through hole 30a comes into contact with the inner wall surface of the through hole 30a as the curved plates 26a and 26b rotate.
  • the revolving motion of the curved plates 26 a and 26 b is not transmitted to the inner pin 31, but only the rotational motion of the curved plates 26 a and 26 b is transmitted to the wheel hub bearing portion C via the wheel-side rotating member 28.
  • the reduction ratio of the reduction part B having the above-described configuration is calculated as (ZA ⁇ ZB) / ZB, where ZA is the number of outer pins 27 and ZB is the number of waveforms of the curved plates 26a and 26b.
  • the in-wheel motor drive device 21 having a compact and high reduction ratio can be obtained. Further, by providing the needle roller bearings on the outer pin 27 and the inner pin 31, the frictional resistance between the curved plates 26a and 26b is reduced, so that the transmission efficiency of the speed reducing portion B is improved.
  • the unsprung weight can be suppressed.
  • the electric vehicle 11 having excellent running stability can be obtained.
  • the lubricating oil supply port 25d is provided in the eccentric portions 25a and 25b, but the present invention is not limited to this, and the lubricating oil supply port 25d can be provided at an arbitrary position of the motor-side rotating member 25.
  • the lubricating oil supply port 25d is preferably provided in the eccentric portions 25a and 25b.
  • the two curved plates 26a and 26b of the speed reduction unit B are provided with 180 ° phase shifts.
  • the number of the curved plates can be arbitrarily set. When three are provided, it is preferable to change the phase by 120 °.
  • the motion conversion mechanism in the above-described embodiment has been shown as an example including the inner pin 31 fixed to the wheel side rotation member 28 and the through hole 30a provided in the curved plates 26a and 26b, Without being limited to the above, it is possible to adopt an arbitrary configuration capable of transmitting the rotation of the speed reduction unit B to the wheel hub 32.
  • it may be a motion conversion mechanism composed of an inner pin fixed to a curved plate and a hole formed in the wheel side rotation member.
  • a radial gap motor is adopted as the motor unit A
  • the present invention is not limited to this, and a motor having an arbitrary configuration can be applied.
  • it may be an axial gap motor including a stator fixed to the housing and a rotor disposed at a position facing the inner side of the stator with a gap in the axial direction.
  • the present invention is not limited to this, and any reduction mechanism can be adopted.
  • a planetary gear reduction mechanism, a parallel shaft gear reduction mechanism, or the like is applicable.
  • this invention is applicable also in the in-wheel motor unit (motor direct drive) without a reduction gear.
  • the electric vehicle 11 shown in FIG. 14 has shown the example which used the rear wheel 14 as the driving wheel, it is not restricted to this,
  • the front wheel 13 may be used as a driving wheel and may be a four-wheel drive vehicle.
  • “electric vehicle” is a concept including all vehicles that obtain driving force from electric power, and should be understood as including, for example, a hybrid vehicle.

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

Abstract

La présente invention vise à proposer un dispositif d'entraînement de moteur dans une roue ayant une durée de vie suffisante même si des boîtiers (22a, 22b) et soit un élément fixe (70) sur le côté corps de véhicule, soit la bague fixe (33) d'une section de palier de moyeu de roue, sont fixés ensembles par des boulons, les boîtiers (22a, 22b) étant formés à l'aide d'un métal léger tel qu'un alliage d'aluminium, le boîtier (22a, 22b) enfermant à la fois la section moteur et la section de réduction de l'unité moteur dans une roue. La présente invention vise également à réduire à un niveau minimal l'épaisseur des parties fixées par boulons. Un élément mâle (61) ou un élément femelle (62) qui forment un élément boulon de fixation est formé à l'aide d'un matériau à base de fer et l'un de l'élément mâle (61) et de l'élément femelle (62) est introduit dans les boîtiers (22a, 22b).
PCT/JP2011/078505 2011-01-04 2011-12-09 Dispositif d'entraînement de moteur dans une roue WO2012093552A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2011000039A JP5778428B2 (ja) 2011-01-04 2011-01-04 インホイールモータ駆動装置
JP2011-000039 2011-01-04
JP2011041598A JP2012176715A (ja) 2011-02-28 2011-02-28 インホイールモータ駆動装置
JP2011-041598 2011-02-28

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WO2012093552A1 true WO2012093552A1 (fr) 2012-07-12

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108138913A (zh) * 2015-11-03 2018-06-08 索尤若驱动有限及两合公司 斜置轴承和具有止推片的减速器
WO2018178535A1 (fr) * 2017-03-28 2018-10-04 Valeo Equipements Electriques Moteur Machine electrique tournante a configuration modifiee pour faciliter la montabilite d'un element fonctionnel

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS622903Y2 (fr) * 1981-10-13 1987-01-23
JPH05253946A (ja) * 1992-03-10 1993-10-05 Toyota Motor Corp インサート部材付発泡コアｆｒｐ成形品
JPH06284622A (ja) * 1993-03-26 1994-10-07 Hitachi Ltd 回転電機
JP2003200455A (ja) * 2002-01-10 2003-07-15 Nsk Ltd 樹脂製部品の成形方法及び車輪速度検出器付きハブ軸受装置
JP2007216930A (ja) * 2006-02-20 2007-08-30 Ntn Corp 電気自動車
JP2008184140A (ja) * 2007-01-31 2008-08-14 Toyota Motor Corp 車両用サスペンション装置
JP2009090921A (ja) * 2007-10-11 2009-04-30 Honda Motor Co Ltd インホイールモータ

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS622903Y2 (fr) * 1981-10-13 1987-01-23
JPH05253946A (ja) * 1992-03-10 1993-10-05 Toyota Motor Corp インサート部材付発泡コアｆｒｐ成形品
JPH06284622A (ja) * 1993-03-26 1994-10-07 Hitachi Ltd 回転電機
JP2003200455A (ja) * 2002-01-10 2003-07-15 Nsk Ltd 樹脂製部品の成形方法及び車輪速度検出器付きハブ軸受装置
JP2007216930A (ja) * 2006-02-20 2007-08-30 Ntn Corp 電気自動車
JP2008184140A (ja) * 2007-01-31 2008-08-14 Toyota Motor Corp 車両用サスペンション装置
JP2009090921A (ja) * 2007-10-11 2009-04-30 Honda Motor Co Ltd インホイールモータ

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108138913A (zh) * 2015-11-03 2018-06-08 索尤若驱动有限及两合公司 斜置轴承和具有止推片的减速器
WO2018178535A1 (fr) * 2017-03-28 2018-10-04 Valeo Equipements Electriques Moteur Machine electrique tournante a configuration modifiee pour faciliter la montabilite d'un element fonctionnel
FR3064841A1 (fr) * 2017-03-28 2018-10-05 Valeo Equipements Electriques Moteur Machine electrique tournante a configuration modifiee pour faciliter la montabilite d'un element fonctionnel

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