WO2013011567A1 - 車両用駆動装置 - Google Patents
車両用駆動装置 Download PDFInfo
- Publication number
- WO2013011567A1 WO2013011567A1 PCT/JP2011/066387 JP2011066387W WO2013011567A1 WO 2013011567 A1 WO2013011567 A1 WO 2013011567A1 JP 2011066387 W JP2011066387 W JP 2011066387W WO 2013011567 A1 WO2013011567 A1 WO 2013011567A1
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- WO
- WIPO (PCT)
- Prior art keywords
- case member
- electric motor
- case
- motor
- gear
- Prior art date
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Classifications
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- 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
- H02K7/006—Structural association of a motor or generator with the drive train of a motor vehicle
-
- 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
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/16—Centering rotors within the stator; Balancing rotors
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K16/00—Machines with more than one rotor or stator
Definitions
- the present invention relates to a structure of a vehicle drive device that can suppress motor noise and performance degradation of the motor in a vehicle drive device including an electric motor in a case.
- a vehicle drive device in which at least one electric motor and an inclined gear portion are housed in a case formed by connecting a plurality of case members is well known.
- the drive device control unit of Patent Document 1 and the hybrid drive device of Patent Document 2 are examples.
- the drive device case 60 includes three case members, and is arranged on the first axis A ⁇ b> 1 in the drive device case 60.
- a generator G (electric motor), a motor M disposed on the second shaft A2, a counter gear mechanism T which is an inclined gear portion disposed on the third shaft, and the like are housed.
- the hybrid drive device 10 of Patent Document 2 as shown in FIG.
- a first motor generator 14, a second motor generator 18, a power distribution mechanism 16 that is an inclined gear portion, and the like disposed on the first axis O ⁇ b> 1 are accommodated.
- the counter gear mechanism T that is an inclined gear portion is attached to the case member that fixes the stator of the generator G and the motor M.
- a support is provided.
- the meshing reaction force generated by the counter gear mechanism T is transmitted to the case member via the support portion.
- the stator fixing positions of the generator G and the motor M are displaced. Therefore, the motor noise is deteriorated due to a change in the gap (air gap) formed between the stator and the rotor of the generator G and the motor M.
- the displacement of the stator fixing position in particular, in order to avoid sliding between the stator and the rotor, it is necessary to increase the air gap in advance, resulting in a decrease in motor performance of the electric motor. End up.
- the stator of the second motor generator 18, the power distribution mechanism 16, and the countershaft 30 having inclined teeth are supported by a common second motor housing 56.
- the stator of the first motor generator 14 is supported by a first motor housing 64, and the countershaft 30 and the power distribution mechanism 16 are supported by the first motor housing via a motor support 54. Therefore, the load by the countershaft 30 and the power distribution mechanism 16 is transmitted to the first motor housing 64 through the motor support 54.
- the motor support 54 constitutes the housing of the first motor generator 14 together with the first motor housing 64, and can be said to be substantially a part of the first motor housing 64.
- Patent Document 2 the air gap between the first motor generator 14 and the second motor generator 18 fluctuates, and motor noise is deteriorated and motor performance is easily deteriorated.
- an object of the present invention is a vehicle in which at least one electric motor and an inclined gear portion are accommodated in a case formed of a plurality of case members.
- a vehicle drive device it is possible to prevent a noise deterioration and a motor performance deterioration due to an air gap variation of the motor by suppressing a change in the stator fixing position of the motor due to a meshing reaction force generated in the inclined gear portion. It is to provide a driving device.
- the gist of the invention according to claim 1 is that (a) at least one electric motor and an inclined gear portion are formed in a case formed by connecting a plurality of case members.
- the case forms a first case member to which a stator of the electric motor is fixed, and a space that is fixed to the first case member and accommodates the electric motor.
- both ends of the rotor of the electric motor are rotatable with respect to the first case member and the second case member, respectively. It is supported by.
- the meshing reaction force of the inclined gear portion is transmitted to the second case member, so that the first case member to which the stator of the motor is fixed is hardly affected by the meshing reaction force. Therefore, displacement of the fixed position of the stator of the electric motor due to the meshing reaction force is also suppressed, so that motor noise due to fluctuations in the air gap of the electric motor can be suppressed.
- the second case member is also used as a support member for the inclined gear portion and a member for forming a space for accommodating the electric motor, so that the member for forming the space for accommodating the electric motor is omitted. Can do.
- an inverter is mounted outside the case, and the inverter is fixed to a case member other than the second case member. In this way, since the meshing reaction force generated at the inclined gear portion is hardly transmitted to the inverter side, the transmission of vibrations using the meshing reaction force as the vibration source to the inverter is suppressed.
- FIG. 1 is a skeleton diagram for explaining the structure of a vehicle drive device according to an embodiment of the present invention. It is a skeleton diagram for demonstrating the structure of the vehicle drive device which is the other Example of this invention. It is a skeleton diagram for demonstrating the structure of the vehicle drive device which is further another Example of this invention. It is a skeleton diagram for demonstrating the structure of the vehicle drive device which is further another Example of this invention. It is a skeleton diagram for demonstrating the structure of the vehicle drive device which is further another Example of this invention. It is sectional drawing for demonstrating in detail the structure of the vehicle drive device which is further another Example of this invention.
- FIG. 1 is a skeleton diagram for explaining the structure of a vehicle drive device 10 according to one embodiment of the present invention.
- the vehicle drive device 10 includes an electric motor 16 and a counter drive gear 18 disposed on the first axis C1, a counter driven gear 20 and a final drive gear 22 disposed on the second axis C2, A differential mechanism 26 to which rotation is input from a final driven gear 24 disposed on the third axis C3 is mainly provided.
- the counter driven gear 20 and the final drive gear 22 correspond to the inclined gear portion of the present invention.
- the case 12 is composed of three case members: a bottomed cylindrical first case member 28, a cylindrical second case member 30 having a partition wall 31, and a bottomed cylindrical third case member 32.
- the mating surface formed on the end surface on the opening side of the first case member 28 and the mating surface formed on the end surface on the first case member 28 side in the axial direction of the second case member 30 are not illustrated bolts.
- the mating surface is formed on the end surface on the third case member 32 side and the end surface on the opening side of the third case member 32.
- the mating surfaces are fastened to each other with bolts (not shown).
- the first case member 28 corresponds to the first case member of the present invention
- the second case member 30 and the third case member 32 correspond to the second case member of the present invention.
- an input shaft 34 rotatable around the first axis C1, a counter shaft 36 rotatable around the second axis C2, and a drive shaft 38 rotatable around the third axis C3 are arranged. ing.
- One end of the input shaft 34 in the axial direction is rotatably supported by the first case member 28 via the bearing 40, and the other end in the axial direction is rotatably supported by the third case member 32 via the bearing 46. Yes.
- the rotor 16r of the electric motor 16 and the counter drive gear 18 are fixed to the input shaft 34 in series in the axial direction.
- the stator 16s of the electric motor 16 is fixed to the first case member 28 by a plurality of bolts 48 arranged in the circumferential direction.
- the electric motor 16 is accommodated in a space 49 formed by connecting the first case member 28 and the second case member 30 to each other. Both ends of the rotor 16r of the electric motor 16 are rotatably supported by the first case member 28 and the second case member 30, respectively. That is, the second case member 30 also functions as a motor cover that rotatably supports one end of the rotor 16r of the electric motor 16.
- the counter shaft 36 is rotatably supported at one end in the axial direction by the second case member 30 (partition wall 31) via the bearing 50, and can be rotated by the third case member 32 at the other end in the axial direction via the bearing 52. It is supported by.
- a counter driven gear 20 that meshes with the counter drive gear 18 and a final drive gear 22 having a smaller diameter than the counter driven gear 20 are fixed to the counter shaft 36 in series in the axial direction.
- the counter driven gear 20 and the final drive gear 22 function as a reduction gear mechanism.
- the counter shaft 36, the bearing 50, and the bearing 52 constitute a support portion for the inclined gear portion of the present invention.
- the drive shaft 38 corresponds to a pair of left and right drive shafts 38R, 38L of the differential mechanism 26 (differential gear), and the drive shaft 38R is rotatably supported by the second case member 30 via a bearing 54. 38L is rotatably supported by the third case member 32 via a bearing 56. Further, a differential mechanism 26 is provided on the third axis C3, and the rotation input from the final driven gear 24 is output to the drive shafts 38L and 38R while giving a differential rotation according to the traveling state of the vehicle. To do.
- the counter drive gear 18, the counter driven gear 20, the final drive gear 22, and the final driven gear 24 of the present embodiment are all configured with inclined teeth. Further, the counter driven gear 20 and the final drive gear 22 are fixed to the counter shaft 36. Accordingly, when the gears mesh with each other, the meshing reaction force generated at the meshing portion of the meshing gears is transmitted to the counter shaft 36, and the meshing reaction force is further transmitted to the second case member 30 and the third case via the bearings 50 and 52. It is transmitted to the member 32.
- the first case member 28 is connected to the second case member 30 at a mating surface with a bolt (not shown).
- the periphery of the part where the mating surface, which is the connecting portion of the case member is formed in a flange shape, and has high rigidity. Therefore, the local displacement (deformation) due to the meshing reaction force of the second case member 30 is hardly transmitted to the first case member 28 across the mating surface.
- the stator 16s of the electric motor 16 is fixed to the first case member 28.
- the stator 16s is fixed to the first case member 28 different from the case members (28, 30) to which the meshing reaction force is transmitted, the meshing reaction force generated in the counter shaft 36 is almost the second case member. 30 and the third case member 32, and the local displacement due to the meshing reaction force is hardly transmitted to the first case member 28.
- the first case member 28 is hardly deformed by the meshing reaction force, and the fixing position of the stator 16s of the electric motor 16 is hardly displaced by the meshing reaction force.
- the fluctuation of the air gap which is the gap between the stator 16s of the electric motor 16 and the rotor 16r, is almost eliminated, and the motor noise of the electric motor 16 due to the fluctuation of the air gap is suppressed.
- the air gap between the stator 16s of the electric motor 16 and the rotor 16 due to fluctuations in the air gap is avoided, it is not necessary to increase the air gap in advance, so that a reduction in motor performance is suppressed.
- the first case member 28 to which the stator 16s of the electric motor 16 is fixed is formed in a flange shape only on the mating surface connected to the second case member 30, and as it goes from the opening side (flange side) toward the bottomed side.
- the outer diameter is reduced.
- the meshing reaction force generated by the counter shaft 36 is transmitted to the second case member 30 and the third case member 32, so that the stator 16s of the electric motor 16 is fixed.
- the one case member 28 is hardly affected by the meshing reaction force. Therefore, since fluctuations in the fixed position of the stator 16s of the electric motor 16 are also suppressed, motor noise due to fluctuations in the air gap of the electric motor 16 can be suppressed.
- the second case member 28 is also used as a support member for the counter shaft 36 and a member for forming the space 49 for accommodating the electric motor 16, a member for forming the space for accommodating the electric motor 16 is used. Can be omitted.
- FIG. 2 is a skeleton diagram for explaining the structure of a vehicle drive device 100 according to another embodiment of the present invention.
- the vehicle drive device 100 includes an engine 104, which is an internal combustion engine, a damper device 105, a first electric motor 106, a second electric motor 108, a first electric motor 106, and the like, which are disposed on a first axis C1 in a case 102.
- a known power distribution mechanism 112 having a counter drive gear 110 that is connected to the second electric motor 108 so as to be capable of transmitting power and functions as an output gear at the outer periphery, a counter driven gear 114 disposed on the second axis C2, and a final
- the drive gear 116 is mainly provided with a differential mechanism 120 to which rotation is input from a final driven gear 118 disposed on the third axis C3.
- the counter driven gear 114 and the final drive gear 116 correspond to the inclined gear portion of the present invention, and the first electric motor 106 and the second electric motor 108 correspond to the electric motor of the present invention.
- the case 102 includes a bottomed cylindrical first case member 122, a cylindrical second case member 124 having a partition wall 123, a cylindrical third case member 126 having a partition wall 125, and a bottomed cylindrical fourth case.
- the member 128 is composed of four case members. In the vicinity of the central portion of the second case member 124 in the axial direction, a diameter-expanded portion 130 extending in the radial direction is formed.
- the mating surface 122a formed on the opening side of the first case member 122 and the mating surface 124a formed by the enlarged diameter portion 130 are fastened to each other by a bolt (not shown).
- the mating surface 124b formed on the end surface of the second case member 124 adjacent to the third case member 126, and the mating surface 126a of the third case member 126 formed on the end surface adjacent to the second case member 124. are fastened to each other by bolts (not shown). Further, the mating surface 126b formed on the end surface of the third case member 126 adjacent to the fourth case member 128 and the mating surface 128a formed on the opening side of the fourth case member 128 are mutually connected by bolts (not shown). It is fastened in close contact.
- the first case member 122 and the fourth case member 128 of the present embodiment correspond to the first case member of the present invention
- the second case member 124 and the third case member 126 correspond to the second case member of the present invention. is doing.
- a cylindrical first rotor shaft 129 is provided on the first axis C1.
- the rotor 106r of the first electric motor 106 is fixed to the first rotor shaft 129, and one end in the axial direction is rotatably supported by the first case member 122 via the bearing 132, and the other end in the axial direction. Is rotatably supported by the second case member 124 (partition wall 123) via a bearing 134. Further, the stator 106 s of the first electric motor 106 is fixed to the first case member 122 by bolts 136.
- the first electric motor 106 is housed in a space 137 formed by connecting the first case member 122 and the second case member 124 to each other. Both ends of the rotor 106r of the first electric motor 106 are rotatably supported by the first case member 122 and the second case member 124, respectively.
- the second motor 108 is housed in a space 139 formed by connecting the third case member 126 and the fourth case member 128 to each other. Both ends of the rotor 108 of the second electric motor 108 are rotatably supported by the third case member 126 and the fourth case member 128, respectively.
- the second case member 124 and the third case member 126 also function as a motor cover that rotatably supports one end of the rotor 106r of the first electric motor 106 and one end of the rotor 108r of the second electric motor 108. .
- the power distribution mechanism 112 disposed on the first axis C ⁇ b> 1 has one axial end rotatably supported by the second case member 124 via the bearing 138 and the other end third via the bearing 140.
- the case member 126 is rotatably supported.
- This power distribution mechanism 112 is configured by a known planetary gear device.
- a sun gear of the planetary gear device is connected to the first electric motor 106
- a carrier is connected to the engine 104 via the damper device 105
- a counter drive A ring gear corresponding to the gear 110 is connected to the second electric motor 108 and meshed with the counter driven gear 114.
- the counter drive gear 110 corresponds to an output member (output shaft, drive shaft) of the power distribution mechanism 112. Therefore, the second electric motor 108 is directly connected to the output member of the power distribution mechanism 112 or directly via the speed reduction mechanism.
- a second rotor shaft 141 is provided on the first axis C1.
- the rotor 108r of the second electric motor 108 is fixed to the second rotor shaft 141, and one end in the axial direction is rotatably supported by the third case member 126 (partition wall 125) via the bearing 142, and others.
- the end is rotatably supported by the fourth case member 128 via a bearing 146.
- the stator 108r of the second electric motor 108 is fixed to the fourth case member 128 with bolts 148.
- a counter shaft 150 is disposed on the second axis C2, and one end in the axial direction is rotatably supported by the second case member 124 (partition wall 126) via a bearing 152, and the other end is supported.
- the third case member 126 is rotatably supported via the bearing 154.
- a counter driven gear 114 that meshes with the counter drive gear 110 and a final drive gear 116 that meshes with the final driven gear 118 are fixed to the counter shaft 150.
- the counter shaft 150, the bearing 152, and the bearing 154 constitute a support portion for the inclined gear portion of the present invention.
- a differential mechanism 120 to which rotation is input from the final driven gear 118 is disposed on the third axis C3, and a pair of drive shafts 156 (156L, 156R) that are output shafts of the differential mechanism 120 are shafts. It is rotatably supported around the center C3.
- the drive shaft 156R is rotatably supported by the second case member 124 via a bearing 158
- the drive shaft 156L is rotatably supported by the third case member 126 via a bearing 160.
- the counter drive gear 110, the counter driven gear 114, the final drive gear 116, and the final driven gear 118 of the present embodiment are all configured with inclined teeth. Therefore, when the gears mesh with each other, the meshing reaction force generated at the meshing portion of the gears meshing with each other is transmitted to the countershaft 150 and further transmitted to the second case member 124 via the bearing 152 and the bearing 154 To the third case member 126.
- the first case member 122 and the fourth case member 128 are connected to the second case member 124 and the third case member 126 via bolts (not shown).
- the periphery of the mating surface which is the connecting portion of the case member, is formed in a flange shape and has high rigidity, local displacement due to the meshing reaction force of the second case member 124 and the third case member 126 is caused by the first case. Almost no transmission is made to the member 122 and the fourth case member 128.
- the stator 106s of the first electric motor 106 is fixed to the first case member 122, and the stator 108s of the second electric motor 108 is fixed to the fourth case member 128.
- the local displacement due to the meshing reaction force of the second case member 124 and the third case member 126 is hardly transmitted to the first case member 122 and the fourth case member 128 across the mating surfaces.
- the stator fixing positions of the first motor 106 and the second motor 108 are hardly displaced by the meshing reaction force, fluctuations in the air gap of the first motor 106 and the second motor 108 are also suppressed.
- the motor noise generated due to the air gap fluctuation of the first electric motor 106 and the second electric motor 108 is suppressed.
- the first case member 122 to which the stator 106s of the first electric motor 106 is fixed is formed so that the outer diameter decreases from the opening side toward the bottomed side.
- the die casting mold can be pulled out in a direction perpendicular to the mating surface 122a. Accordingly, the degree of freedom in arranging the ribs for reinforcing the first case member 122 is increased, and the strength can be effectively increased with, for example, fewer ribs.
- the fourth case member 128 to which the stator 108s of the second electric motor 108 is fixed is formed so that the outer diameter becomes smaller from the opening side toward the bottomed side. Accordingly, when the fourth case member 128 is molded by aluminum die casting, the die casting mold can be pulled out in a direction perpendicular to the mating surface 128a. Therefore, the degree of freedom of the arrangement of the ribs for reinforcing the fourth case member 128 is increased, and the strength can be effectively increased with, for example, fewer ribs.
- the second case member 124 is also used as a support member for the counter shaft 150 and a member for forming the space 137 for accommodating the first electric motor 106, and thus forms the 137 for accommodating the first electric motor 106.
- the member for this can be omitted.
- the third case member 126 is also used as a support member for the counter shaft 150 and a member for forming the space 139 for accommodating the second electric motor 108, the space 139 for accommodating the second electric motor 108 is used.
- the member for forming can be omitted.
- FIG. 3 is a skeleton diagram for explaining the structure of a vehicle drive device 200 according to still another embodiment of the present invention.
- the vehicle drive device 200 transmits power to the engine 204, which is an internal combustion engine, the damper device 206, the first electric motor 208, the engine 204, and the first electric motor 208, which are disposed on the first axis C1 in the case 202.
- a known power distribution mechanism 212 having a first counter drive gear 210 as an output gear on the outer periphery, and a counter driven gear 214 and a first reduction gear 216 disposed on the second axis C2, Second counter drive gear 218 and second electric motor 220 disposed on third axis C3, second reduction gear 222 and final drive gear 224 disposed on fourth axis C4, and fifth axis It is mainly provided with a differential mechanism 228 that is arranged on C5 and receives rotation from the final driven gear 226. That. Note that the counter driven gear 214, the first reduction gear 216, the second reduction gear 222, and the final drive gear 224 correspond to the inclined gear portion of the present invention, and the first motor 208 and the second motor 220 of the present invention. Compatible with electric motors.
- the case 202 is composed of three case members: a bottomed cylindrical first case member 230, a second case member 234 having a partition wall 232, and a third case member 238 having a partition wall 236.
- the mating surface 230a formed on the opening side of the first case member 230 and the mating surface 234a formed on the end surface adjacent to the first case member 230 of the second case member 234 are mutually connected by bolts (not shown). It is fastened in close contact.
- the mating surface 234b formed on the end surface of the second case member 234 adjacent to the third case member 238, and the mating surface 238a of the third case member 238 formed on the end surface adjacent to the second case member 234, Are fastened to each other by bolts (not shown).
- corresponds to the 1st case member of this invention
- the 2nd case member 234 and the 3rd case member 238 correspond to the 2nd case member of this invention.
- the first electric motor 208 and the second electric motor 220 are arranged on different rotational axes and at positions overlapping in the radial direction. Thereby, the axial length of the vehicle drive device 200 is configured to be short.
- a rotor shaft 239 is disposed on the first axis C1.
- the rotor 208r of the first electric motor 208 is fixed to the rotor shaft, and one end in the axial direction is rotatably supported by the first case member 230 via the bearing 240, and the other end is supported via the bearing 246.
- Two case members 234 (partition walls 232) are rotatably supported. Further, the stator 208 s of the first electric motor 208 is fixed to the first case member 230 with bolts 248.
- first motor 208 and the second motor 220 are accommodated in a space 249 formed by connecting the first case member 230 and the second case member 234 to each other. Both ends of the rotor 208r of the first electric motor 208 are rotatably supported by the first case member 230 and the second case member 234. That is, the second case member 234 also functions as a motor cover that rotatably supports one end of the rotor 208r of the first electric motor 208 and the rotor 220r of the second electric motor 220.
- the power distribution mechanism 212 disposed on the first shaft center C1 has one end in the axial direction rotatably supported by the second case member 234 (partition wall 232) via the bearing 250 and the other end bearing 252.
- the third case member 238 (the partition wall 236) is rotatably supported via the. Since the specific configuration of the power distribution mechanism 212 is basically the same as that of the power distribution mechanism 112 of the above-described embodiment, the description thereof is omitted.
- a first counter shaft 254 is disposed on the second axis C2, and one end in the axial direction is rotatably supported by the second case member 234 (partition wall 232) via the bearing 256, and the other end is a bearing. It is rotatably supported by the third case member 238 (partition wall 236) via 258.
- a counter driven gear 214 that meshes with the first counter drive gear 210 and the second counter drive gear 218, and a first reduction gear 216 that meshes with the second reduction gear 222 are formed on the first counter shaft 254. In FIG. 3, the first reduction gear 216 and the second reduction gear 222 are shifted in the axial direction, but actually, the first reduction gear 216 and the second reduction gear 222 are in the axial direction.
- FIG. 3 is a development view in which the respective rotation axes are represented by one plane, and the first reduction gear 216 and the second reduction gear 222 are arranged at positions shifted in the axial direction for convenience. Further, the first counter shaft 254, the bearing 256, and the bearing 258 constitute a support portion for the inclined gear portion of the present invention.
- a power transmission shaft 260 is disposed on the third axis C3, and one end in the axial direction is rotatably supported by the first case member 230 via the bearing 262, and the other end is supported via the bearing 264.
- the three case members 238 (partition walls 236) are rotatably supported.
- a second electric motor 220 and a second counter drive gear 218 are provided on the power transmission shaft 260. Specifically, the rotor 220r of the second electric motor 220 is fixed to the power transmission shaft 260. Further, the stator 220s of the second electric motor 220 is fixed to the first case member 230 by bolts 266. A second counter drive gear 218 that meshes with the counter driven gear 214 is fixed to the power transmission shaft 260. Therefore, the power of the second electric motor 220 is transmitted to the counter driven gear 214 via the second counter drive gear 218.
- a second counter shaft 268 is disposed on the fourth axis C4, and one end in the axial direction is rotatably supported by the second case member 234 (partition wall 232) via the bearing 270, and the other end is a bearing. 272 is rotatably supported by the third case member 238 (partition wall 236).
- a second reduction gear 222 that meshes with the first reduction gear 216 and a final drive gear 224 that meshes with the final driven gear 226 are fixed to the second counter shaft 268.
- the second counter shaft 268, the bearing 270, and the bearing 272 constitute a support portion for the inclined gear portion of the present invention.
- a differential mechanism 228 to which rotation is input from the final driven gear 226 is disposed on the fifth axis C5, and a pair of drive shafts 274 (274L, 274R) that are output shafts of the differential mechanism 228 are shafts. It is rotatably supported around the center C5.
- the drive shaft 274R is rotatably supported by the third case member 238 via a bearing 276, and the drive shaft 274L is rotatably supported by the second case member 234 via a bearing 278.
- the first counter drive gear 210, the counter driven gear 214, the first reduction gear 216, the second counter drive gear 218, the second reduction gear 222, the final drive gear 224, and the final driven gear 226 of this embodiment are all configured with inclined teeth. ing. Therefore, when the gears mesh with each other, the meshing reaction force generated at the meshing portion of the gears meshing with each other is transmitted to the first counter shaft 254, further transmitted to the second case member 234 via the bearing 256, and the bearing 258. Is transmitted to the third case member 238 via. Further, the meshing reaction force generated at the gear meshing portion and transmitted to the second counter shaft 268 is transmitted to the second case member 234 via the bearing 270 and also to the third case member 238 via the bearing 272. Communicated.
- the first case member 230 is connected to the second case member 234 via a bolt (not shown). Since the periphery of the mating surface, which is the connection portion of the case member, is formed in a flange shape and has high rigidity, local displacement due to the meshing reaction force of the second case member 234 is almost transmitted to the first case member 230. Not.
- the stator 208s of the first electric motor 208 is fixed to the first case member 230
- the stator 220s of the second electric motor 220 is fixed to the first case 230. Accordingly, the local displacement due to the meshing reaction force of the second case member 234 is hardly transmitted to the first case member 230 across the mating surface, and the first case member 230 is displaced by the meshing reaction force. Since (deformation) is hardly transmitted, the fixing positions of the stator 208s of the first motor 208 and the stator 220s of the second motor 220 are hardly displaced by the meshing reaction force, and the air of the first motor 208 and the second motor 220 is not displaced. Gap fluctuations are also suppressed. As a result, motor noise generated by air gap fluctuations in the first electric motor 208 and the second electric motor 220 is suppressed.
- the first case member 230 to which the stator 208s of the first motor 208 and the stator 220s of the second motor 220 are fixed is formed so that the outer diameter decreases from the opening side toward the bottomed side. Accordingly, when the first case member 230 is molded by aluminum die casting, the die casting mold can be pulled out perpendicularly to the mating surface 230a. Therefore, the degree of freedom of arrangement of the ribs for reinforcing the first case member 230 is increased, and the strength can be effectively increased with, for example, fewer ribs.
- the second case member 234 is also used as a member for forming a space 249 that accommodates the first motor 208 and the second motor 220 as well as a support member for the first counter shaft 254 and the second counter shaft 268.
- the members for forming the space 249 for accommodating the first motor 208 and the second motor 220 can be omitted.
- FIG. 4 is a skeleton diagram for explaining the structure of a vehicle drive apparatus 300 which is still another embodiment of the present invention. Comparing the vehicle drive device 300 of FIG. 4 with the vehicle drive device 200 shown in FIG. 3 described above, only the structure of the case is different and the other structures are common. The same reference numerals as those of the vehicle drive device 200 are attached. Hereinafter, the configuration of the case, which is a part different from the vehicle drive device 200 described above, will be described.
- the case 302 of the vehicle drive device 300 includes three case members: a bottomed cylindrical first case member 304, a disk-shaped second case member 306, and a third case member 310 having a partition wall 308.
- the first case member 304 is formed of a bottomed cylindrical first cylindrical portion 304a and a cylindrical second cylindrical portion 304b that is partially expanded in diameter from the opening of the first cylindrical portion 304a. ing.
- a mating surface 312 is formed at the connecting portion between the first tube portion 304a and the second tube portion 304b. The mating surface 312 and the mating surface 314 formed on the outer periphery of the motor cover 306 are fastened in close contact with each other by a bolt (not shown).
- a mating surface 316 is formed on the outer peripheral end surface of the second cylindrical portion 304b of the first case member 304.
- the mating surface 316 and the mating surface 318 formed on the end surface of the third case member 310 on the second case member 306 side are fastened to each other by bolts (not shown).
- the stator 208s of the first electric motor 208 is fixed to the first case member 304 (first cylindrical portion 304a) by a bolt 248, and the stator 220s of the second electric motor 220 is fixed to the first case member 304 (first first member).
- the tube portion 304a) is fixed by a bolt 266.
- the first counter shaft 254 is rotatably supported at one end in the axial direction by the second case member 306 via the bearing 256, and the third case member 310 (partition wall 308) at the other end via the bearing 258. Is rotatably supported.
- the second counter shaft 268 has one end in the axial direction rotatably supported by the second case member 306 via the bearing 270 and the other end rotatable to the third case member 310 via the bearing 272. It is supported.
- first motor 208 and the second motor 220 are accommodated in a space 320 formed by connecting the first case member 304 and the second case member 306 to each other. Both ends of the rotor 208r of the first electric motor 208 are rotatably supported by the first case member 304 and the second case member 306. That is, the second case member 306 also functions as a motor cover that rotatably supports one end of the rotor 208r of the first electric motor 208 and the rotor 220r of the second electric motor 220.
- the meshing reaction force transmitted to the first counter shaft 254 and the second counter shaft 268 during gear engagement is transmitted to the second case member 306 and the third case member 310.
- the first case member 304 is connected to the second case member 306 and the second case member 310 via bolts (not shown). Since the periphery of the mating surface, which is the connecting portion of each case member, is formed in a flange shape and has high rigidity, the local displacement due to the meshing reaction force between the second case member 306 and the third case member 310 is the first. It is hardly transmitted to the case member 304.
- the displacement of the stator 208s of the first electric motor 208 and the stator 220s of the second electric motor 220 is also suppressed by the meshing reaction force, so that fluctuations in the air gap between the first electric motor 208 and the second electric motor 220 are also suppressed.
- the motor noise generated due to the air gap fluctuation of the first electric motor 208 and the second electric motor 220 is suppressed.
- the first case member 304 to which the stator 208s of the first motor 208 and the stator 220s of the second motor 220 are fixed has a smaller outer diameter from the opening side toward the bottomed side.
- the die casting mold can be pulled out perpendicularly to the mating surface 316. Accordingly, the degree of freedom in arranging the ribs for reinforcing the first case member 304 is increased, and for example, the strength can be increased with a small number of ribs.
- the second case member 306 is also used as a support member for the first counter shaft 254 and a member for forming the space 320 for accommodating the first electric motor 208 and the second electric motor 220. Therefore, the first electric motor 208 is used. And the member for forming the space 320 which accommodates the 2nd electric motor 220 can be abbreviate
- FIG. 5 is a skeleton diagram for explaining the structure of a vehicle drive device 400 according to still another embodiment of the present invention.
- an inverter 402 (motor control unit) is mounted outside the case of the vehicle drive device 200 shown in FIG. Since the other structure is the same as that of the vehicle drive device 200, the same reference numerals as those of the vehicle drive device 200 are used and description thereof is omitted.
- the holding mechanism of the inverter 402 will be described.
- the first case member 230 is provided with an inverter fixing portion 406 for fixing the inverter 402.
- the inverter 402 is fixed to the inverter fixing portion 406 with a bolt (not shown).
- the meshing reaction force generated by the first counter shaft 254 is applied to the second case member 234 and the third case member 238 via the bearing 256 and the bearing 258. It is transmitted and hardly transmitted to the first case member 230.
- the meshing reaction force generated by the second counter shaft 268 is transmitted to the second case member 234 and the third case member 238 via the bearing 270 and the bearing 272, and is hardly transmitted to the first case member 230. Therefore, it is possible to reduce vibration transmitted to the inverter 402 using the meshing reaction force as a vibration source.
- the vehicle drive device 400 of the present embodiment can achieve the same effects as the vehicle drive device 10 and the like. Further, since the inverter 402 is fixed to a case member other than the second case member 234, specifically, the first case member 230, the transmission of vibration to the inverter 402 caused by the meshing reaction force is suppressed. can do.
- FIG. 6 is a cross-sectional view for explaining in detail the structure of a vehicle drive apparatus 500 that is still another embodiment of the present invention.
- the vehicle drive device 500 is compared with the vehicle drive device 10 of FIG. 1, only the arrangement position of the electric motor is different, and the basic power transmission mechanism is common.
- the vehicle drive device 500 includes an electric motor 504 and a counter drive gear 506 disposed on the first axis C1, and a counter driven gear 508 and a final drive gear 510 disposed on the second axis C2.
- a differential mechanism 514 to which rotation is input from a final driven gear 512 disposed on the third axis C3 is mainly configured.
- the case 502 is composed of three case members, a bottomed cylindrical first case member 516, a disk-shaped second case member 518, and a bottomed cylindrical third case member 520. As shown in FIG. 6, the mating surfaces of the second case member 518 and the third case member 520 are integrally fastened with bolts 522 in close contact with each other. In the first case member 516 and the second case member 518 as well, although not shown, the adjacent mating surfaces are fastened to each other by bolts (not shown).
- the vehicle drive device 500 includes an input shaft 524 that can rotate around the axis C1.
- the input shaft 524 includes a first input shaft 524a and a second input shaft 524b, and is arranged in series on the axis C1. And it is made mutually non-rotatable by spline fitting in the connection part of the 1st input shaft 524a and the 2nd input shaft 524b.
- first input shaft 524a is rotatably supported by the first case member 516 via the bearing 526, and the other end is rotatably supported by the second case member 518 via the bearing 528.
- the rotor 504r of the electric motor 504 is fixed to the first input shaft 524a.
- the stator 504 s of the electric motor 504 is fixed to the first case member 516 by a bolt 530.
- a resolver 532 for detecting the rotational speed of the rotor 504 r of the electric motor 504 is provided between the electric motor 504 and the bearing 526.
- the electric motor 504 is housed in a space 533 formed by connecting the first case member 516 and the second case member 518 to each other. Both ends of the first input shaft 524a to which the rotor 504r of the electric motor 504 is fixed are rotatably supported by the first case member 516 and the second case member 518, respectively. That is, the second case member 518 also functions as a motor cover that rotatably supports one end of the rotor 504r of the electric motor 504.
- the second input shaft 524b has one end in the axial direction rotatably supported by the second case member 518 via the bearing 534 and the other end rotatably supported by the third case member 520 via the bearing 536. ing.
- a counter drive gear 506 is provided on the second input shaft 524b. Therefore, the power of the electric motor 504 is output from the counter drive gear 506.
- the vehicle drive device 500 includes a counter shaft 538 that can rotate around the axis C2.
- the counter shaft 538 has one end in the axial direction rotatably supported by the second case member 518 via the bearing 540 and the other end rotatably supported by the third case member 520 via the bearing 546.
- a final drive gear 510 is integrally formed on the counter shaft 538.
- the counter driven gear 508 is integrally provided by spline fitting.
- a differential mechanism 514 to which rotation is input from the final driven gear 512 is provided on the axis C3.
- a rotation difference corresponding to the vehicle running state is given, and the rotation is output from the left and right drive wheels 550 (550L, 550R).
- the drive wheel 550R is rotatably supported by the third case member 520 via the bearing 552, and the drive wheel 550L is rotatably supported by the second case member 518 via the bearing 554.
- the counter drive gear 506, the counter driven gear 508, the final drive gear 510, and the final driven gear 512 are all configured with inclined teeth. Therefore, for example, when power is transmitted from the electric motor 504, a meshing reaction force is generated between the counter drive gear 506 and the counter driven gear 508 and between the final drive gear 510 and the final driven gear 512.
- the meshing reaction force is transmitted to the counter shaft 538 and is transmitted from the counter shaft 538 to the second case member 518 and the third case member 520 through the bearing 540 and the bearing 546.
- the first case member 516 is connected to the second case member 518 by a bolt (not shown).
- the periphery of the mating surface which is a connecting portion between the first case member 516 and the second case member 518, is formed in a flange shape and has high rigidity. Therefore, local displacement (deformation) due to the meshing reaction force of the second case member 518 is hardly transmitted to the first case member 516 across the mating surface. Accordingly, the first case member 516 is hardly deformed by the meshing reaction force, and the stator fixing position of the electric motor 504 is hardly changed. Therefore, motor noise due to air gap fluctuation of the electric motor 504 is suppressed. In addition, it is not necessary to increase the air gap, which is a gap between the stator 504s of the electric motor 504 and the rotor 504r in advance, and motor performance deterioration due to expansion of the air gap is suppressed.
- the vehicle drive device 500 of the present embodiment can achieve the same effects as the vehicle drive device 10 and the like.
- the above-described embodiment is an example, and the configuration of the vehicle drive device is not limited to the above-described embodiments.
- the present invention can be used as appropriate as long as the case is composed of a plurality of case members and includes an electric motor and an inclined gear portion.
- Vehicle drive device 12 102, 202, 302, 502: Case 16, 504: Electric motor 16r, 106r, 108r, 208r, 220r, 504r: Rotor 16s, 106s, 108s , 208 s, 220 s, 504 s: stator 20, 114, 214, 508: counter driven gear (oblique gear) 22, 116, 510: Final drive gear (oblique gear) 28, 122, 230, 304, 516: first case member 30, 124, 234, 306, 518: second case member 32, 126, 238, 310, 520: third case member (second case member) 128: Fourth case member (first case member) 36, 150, 538: counter shaft (supporting portion of inclined gear) 49, 137, 139, 249, 320, 533: Space 50, 52, 152, 154, 256, 258, 270, 272, 540, 546: Bearing (supporting portion of the inclined gear)
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
- Motor Or Generator Frames (AREA)
- Hybrid Electric Vehicles (AREA)
- General Details Of Gearings (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
Description
3つのケース部材から構成されている。第1ケース部材304は、有底筒状の第1筒部304aおよびその第1筒部304aの開口部から一部が径方向に拡径されている筒状の第2筒部304bから形成されている。この第1筒部304aと第2筒部304bとの連結部に合わせ面312が形成されている。そして、この合わせ面312とモータカバー306の外周部に形成されている合わせ面314とが図示しないボルトによって相互に密着状態で締結されている。また、第1ケース部材304の第2筒部304bの外周端面に合わせ面316が形成されている。この合わせ面316と第3ケース部材310の第2ケース部材306側の端面に形成される合わせ面318とが図示しないボルトによって相互に密着状態で締結されている。
12、102、202、302、502:ケース
16、504:電動機
16r、106r、108r、208r、220r、504r:ロータ
16s、106s、108s、208s、220s、504s:ステータ
20、114、214、508:カウンタドリブンギヤ(斜歯ギヤ部)
22、116、510:ファイナルドライブギヤ(斜歯ギヤ部)
28、122、230、304、516:第1ケース部材
30、124、234、306、518:第2ケース部材
32、126、238、310、520:第3ケース部材(第2ケース部材)
128:第4ケース部材(第1ケース部材)
36、150、538:カウンタ軸(斜歯ギヤ部の支持部)
49、137、139、249、320、533:空間
50、52、152、154、256、258、270、272、540、546:軸受(斜歯ギヤ部の支持部)
106、208:第1電動機(電動機)
108、220:第2電動機(電動機)
216:第1減速ギヤ(斜歯ギヤ部)
254:第1カウンタ軸(斜歯ギヤ部の支持部)
268:第2カウンタ軸(斜歯ギヤ部の支持部)
402:インバータ
Claims (2)
- 複数のケース部材が連結されることで形成されるケース内に、少なくとも1つの電動機および斜歯ギヤ部が収容される車両用駆動装置であって、
前記ケースは、前記電動機のステータが固定されている第1ケース部材と、該第1ケース部材に固定されて該電動機を収容する空間を形成し、且つ、前記斜歯ギヤ部の支持部が設けられている第2ケース部材とを含み、
前記電動機のロータの両端は、前記第1ケース部材および前記第2ケース部材にそれぞれ回転可能に支持されていることを特徴とする車両用駆動装置。 - 前記ケースの外側にはインバータが搭載されており、該インバータは、前記第2ケース部材以外のケース部材に固定されていることを特徴とする請求項1の車両用駆動装置。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US14/233,222 US9991760B2 (en) | 2011-07-19 | 2011-07-19 | Drive device for vehicle |
JP2013524547A JP5630581B2 (ja) | 2011-07-19 | 2011-07-19 | 車両用駆動装置 |
CN201180072357.5A CN103688447B (zh) | 2011-07-19 | 2011-07-19 | 车辆用驱动装置 |
PCT/JP2011/066387 WO2013011567A1 (ja) | 2011-07-19 | 2011-07-19 | 車両用駆動装置 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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PCT/JP2011/066387 WO2013011567A1 (ja) | 2011-07-19 | 2011-07-19 | 車両用駆動装置 |
Publications (1)
Publication Number | Publication Date |
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WO2013011567A1 true WO2013011567A1 (ja) | 2013-01-24 |
Family
ID=47557774
Family Applications (1)
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PCT/JP2011/066387 WO2013011567A1 (ja) | 2011-07-19 | 2011-07-19 | 車両用駆動装置 |
Country Status (4)
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US (1) | US9991760B2 (ja) |
JP (1) | JP5630581B2 (ja) |
CN (1) | CN103688447B (ja) |
WO (1) | WO2013011567A1 (ja) |
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Also Published As
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CN103688447B (zh) | 2016-09-28 |
US20140285045A1 (en) | 2014-09-25 |
JPWO2013011567A1 (ja) | 2015-02-23 |
JP5630581B2 (ja) | 2014-11-26 |
US9991760B2 (en) | 2018-06-05 |
CN103688447A (zh) | 2014-03-26 |
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