JP4406883B2 - Drive device for hybrid vehicle - Google Patents

Description

  The present invention relates to a drive device for a hybrid vehicle, and more particularly to a drive device for a hybrid vehicle in which an engine and a plurality of motor generators are mounted on the vehicle as a drive source.

  As a vehicle, in recent years, due to problems such as environmental problems and energy savings, a combination of an engine that generates a driving force by burning fuel and a motor generator that generates a driving force by electricity as a driving source is efficient. There is a so-called hybrid vehicle (HEV) that travels by selecting a drive source.

Conventionally, a drive device for a hybrid vehicle has a power split mechanism using a planetary gear disposed between two motor generators, and transmits a driving force of an engine to a drive wheel by a reduction mechanism using a chain. is there. That is, as shown in FIG. 10, the first motor generator 404 mainly used for power generation is disposed on the engine 402 side, and mainly on the side farther from the engine 402 than the first motor generator 404. A second motor generator 406 used as an electric motor is disposed, and a planetary gear mechanism 408 is disposed between the first motor generator 404 and the second motor generator 406. The inner rings of the bearings 412 and 414 are press-fitted into an input shaft 410, and the outer rings of the bearings 412 and 414 are held in the case 416.
Further, in the drive device of the hybrid vehicle, the stators of the generator (generator) and the electric motor (motor) are arranged in a common case that is accommodated adjacent to each other in the axial direction, and the generator and the electric motor There are some which reduce the number of necessary parts when providing each separately.
JP-A-9-226392 JP 2001-138852

  Conventionally, the hybrid vehicle drive apparatus disclosed in Patent Document 1 employs a structure in which an inner ring of a bearing is press-fitted into both ends of a motor shaft and the outer ring of the bearing is held by a case. For this reason, in order to insert and arrange a motor rotor incorporating a strong magnet into the motor stator, it is difficult to center the motor rotor, the motor rotor assembly process becomes complicated, and skilled technology and equipment are required. There was an inconvenience.

According to the present invention, an engine and a plurality of motor generators are mounted on a vehicle as a drive source , and the plurality of motor generators are composed of a first motor generator, a second motor rotor, and a second motor stator each including a first motor rotor and a first motor stator. becomes the second constituted by a motor-generator, the first motor generator and the second motor-generator is disposed in the motor casing are arranged coaxially, the motor case between the first motor generator and the second motor-generator A partition wall that divides the interior of the motor case into a first motor chamber and a second motor chamber, and the first motor stator and the second motor stator are respectively connected to the inner peripheral surface of the motor case on the first motor chamber side and the A first bearing holding that is fixed to the inner peripheral surface on the second motor chamber side and extends into the first motor chamber on the partition wall And a second bearing holding portion extending to the second motor chamber, and a first rotor shaft member attached to the inner side in the radial direction of the first motor rotor is disposed on the inner periphery of the first bearing holding portion. A hybrid vehicle in which a second rotor shaft member attached to a radially inner side of the second motor rotor is rotatably held on an outer periphery of the second bearing holding portion via a second bearing. In the driving apparatus, the first bearing is disposed in a portion where the first rotor shaft member is protruded in the axial direction from the end of the first motor rotor toward the partition wall, and the first bearing is disposed in the first direction. When the outer periphery of the first bearing is held by the first bearing holding portion by being inserted into the inner periphery of the first motor stator from the side opposite to the partition wall in a state of being attached to the outer periphery of the one rotor shaft member, One motor rotor is the first motor Characterized in that a first introduction part that mates with the outer periphery of the first bearing at the inner circumference of the first motor stator before begins to enter into the inner circumference of the over data to the distal end of the first bearing holding portion .

Driving device for a hybrid vehicle of the invention utilizes the introduction of the integral bearing holder in the partition wall, is held through a bearing rotor shaft member motor rotor is fixed to the bearing holder, whereby the motor rotor Can be easily centered, and the assembly process of the motor rotor can be simplified.

This invention implement | achieves the objective which simplifies the assembly | attachment process of a motor rotor using the introducing | transducing part of the bearing holding part of a partition wall.
Hereinafter, embodiments of the present invention will be described in detail and specifically with reference to the drawings.

  1 to 6 show a first embodiment of the present invention.

  In FIG. 4, reference numeral 2 denotes an engine mounted on a hybrid vehicle (not shown), and 4 denotes a drive unit connected to the engine 2. In the hybrid vehicle, an engine 2 that generates a driving force by burning fuel and a plurality of motor generators 118 and 120 (described later) in the driving device 4 that generates a driving force by electricity are mounted as a driving source.

  The housing 6 of the driving device 4 includes a transmission case 8 on the engine 2 side, and a motor case 10 that is connected to the transmission case 8 and accommodates a plurality of motor generators 118 and 120 described later.

  The transmission case 8 includes a first transmission case 12 attached to the engine 2 and a second transmission case 14 attached to the first transmission case 12.

  In the motor case 10, a plate 16 to be joined to the second speed change case 14 is attached to an end surface on the engine 2 side by a mounting bolt 18, and a cover member 20 is mounted on the end surface on the side away from the engine 2. Attached. Then, the motor case 10 is integrally assembled to the second transmission case 14 with a mounting bolt 24 via the plate 16.

  In the housing 6, an input shaft 28 connected to the crankshaft 26 concentrically with the crankshaft 26 of the engine 2 and a motor rotor shaft 30 connected to the input shaft 28 are disposed. The counter shaft 32 is disposed in parallel with the counter shaft 32.

  Further, the first transmission case 12 is provided with a first partition wall 34 oriented in the direction of the inner input shaft 28, and the second transmission case 14 has a second partition wall 36 oriented in the direction of the inner input shaft 28. A third partition wall 38 is continuously provided at a substantially central portion of the motor case 10 and directed toward the inner motor rotor shaft 30. Accordingly, a flywheel chamber 40 is formed in the housing 6 between the engine 2 and the first partition wall 34, and the speed change chamber 42 and the second partition wall 36 are formed between the first partition wall 34 and the second partition wall 36. A differential chamber 44 is formed, a first motor chamber 46 is formed in the first case portion 10-1 between the third partition wall 38 and the cover member 20, and the plate 16 and the third partition wall 38 are A second motor chamber 48 is formed in the second case portion 10-2 therebetween.

  The input shaft 28 is disposed through the first partition wall 34 and the second partition wall 36 in the housing 6. In addition, the motor rotor shaft 30 is disposed in the housing 6 so as to penetrate the third partition wall 38 and supports a plurality of motor generators 118 and 120 described later.

  A flywheel 50 that is pivotally supported by the end of the input shaft 28 on the engine 2 side and disposed in the flywheel chamber 40 is attached to the end of the crankshaft 26. A damper 52 fixed to the input shaft 28 is connected to the flywheel 50.

  In addition, a power split mechanism 54 is disposed in the speed change chamber 42 between the input shaft 28 and the motor rotor shaft 30. A differential 56 is disposed in the differential chamber 44.

  The drive device 4 inputs the driving force of the engine 2 to the input shaft 28 via a torque modulation adjusting damper 52 connected to the flywheel 50 at the end of the crankshaft 26. The input shaft 28 is pivotally supported on the first partition wall 34 so as to be rotatable only in the forward rotation direction of the engine 2 via the one-way clutch 58 in the first transmission case 12. In addition, the one-way clutch 58 is attached to the first partition wall 34 in a state of being housed in the one-way clutch holder 60.

  On the outer periphery of the one-way clutch holder 58, an output gear 62 for outputting driving force to driving wheels (not shown) is rotatably supported.

  A counter gear 64 fixed to the counter shaft 32 is meshed with the output gear 62. The counter shaft 32 is provided with a final reduction gear train 66 that transmits the driving force to the differential 56. The final reduction gear train 66 includes a drive gear 68 fixed to the counter shaft 32 and a driven gear 70 meshed with the drive gear 68. The driven gear 70 is fixed to a differential case 72 of the differential 56. Further, an axle 74 to which drive wheels are attached is connected to the differential 56.

  The output gear 62 is decelerated one stage by the counter gear 64 of the counter shaft 32, and the driving force is transmitted from the axle 74 to the drive wheels via the differential 56 by the final reduction gear train 66.

  As shown in FIG. 5, the power split mechanism 54 is of the Simpson type, and is connected to the first planetary gear train 76 on the engine 2 side and the first planetary gear train 76 on the side separated from the engine 2. The two planetary gear trains 78 are integrally formed.

  In the power split mechanism 54, as shown in FIG. 5, the first planetary gear train 76 is engaged with the first ring gear 80 and the first ring gear 80, and the first rotation support shaft 82 is rotatably supported. The pinion gear 84 and the first sun gear 88 of the sun gear portion 86 meshed with the first pinion gear 84 are configured. As shown in FIGS. 4 and 5, the first ring gear 80 is connected to the output gear 62 via the arm portion 90. A first carrier 92 fixed to the input shaft 28 is attached to the first rotation support shaft 82.

  The second planetary gear train 78 meshes with the second ring gear 94, a second pinion gear 98 meshed with the second ring gear 94 and rotatably supported by the second rotation support shaft 96, and the second pinion gear 98. And the second sun gear 100 of the sun gear portion 86. As shown in FIG. 4, a second carrier 104 fixed to the first carrier 92 with mounting bolts 102 is attached to the second rotation support shaft 96.

  On the other hand, as shown in FIG. 4, an oil pump 106 is provided at the end of the input shaft 28 that is separated from the engine 2 side. The oil pump 106 includes a pump rotor 108 fixed to an end of the input shaft 28 that is spaced from the engine 2 side, and a cover chamber 26 that is provided with a mounting bolt 112 so as to cover the pump rotor 108 and form a pump chamber 110. The pump cover 114 is attached, and oil for forcibly lubricating each part including the power split mechanism 54 is supplied via an oil passage 116 in the input shaft 28.

  The driving device 4 is provided with a first motor generator (MG1) 118 capable of generating power and a second motor generator (MG2) 120 capable of driving as a plurality of motor generators. The first motor generator 118 and the second motor generator 120 are arranged side by side in a common motor case 10. That is, in the motor case 10, as described above, the third partition wall 38 is provided as a partition wall that partitions the first motor chamber 46 and the second motor chamber 48, and the first motor chamber The first motor generator 118 is accommodated in 46, and the second motor generator 120 is accommodated in the second motor chamber 48. As a result, the second motor generator 120 is disposed on the power distribution mechanism 54 side, and the first motor generator 118 is disposed on the cover portion 20 side that closes the motor case 10.

  As shown in FIG. 2, the first motor generator 118 is mainly used for power generation, and corresponds to the first motor rotor 124 fixed to the outer peripheral surface of the first rotor shaft member 122 and the first motor rotor 124. The motor case 10 includes a first motor stator 126 fixed to the inner peripheral surface of the first case portion 10-1. The first motor rotor 124 is formed by laminating silicon steel plates into which permanent magnets (not shown) are inserted, and is held by the motor rotor shaft 30 that penetrates the third partition wall 38.

  The first rotor shaft member 122 is connected to the sun gear 86 on the inner peripheral side and is fitted to a cylindrical motor output shaft 128 that extends in the axial direction of the input shaft 28; A first rotor installation portion 132 for installing the first motor rotor 124 is provided on the outer peripheral side. The motor output shaft 128 is held on the motor rotor shaft 30 via a needle bearing 134.

  The rotor-side bearing portion 130 includes a one-side rotor bearing portion 136 on the engine 2 side and an other-side rotor bearing portion 138 on the side away from the engine 2. A one-side bearing step portion 140 is formed on the outer peripheral surface of the one-side rotor bearing portion 136. The other side bearing step 142 is formed on the outer peripheral surface of the other side rotor bearing portion 138. Further, a coupling spline 136 </ b> A coupled to the motor output shaft 128 is formed on the outer peripheral surface of the one-side rotor bearing portion 136.

  The first rotor installation portion 132 includes a mounting projection 144 of the first rotor shaft member 122, a first motor rotor 124, first first side end plates 146 and first other side ends at both ends of the first motor rotor 124. The first motor rotor 124 is attached by a first rotor attachment bolt 150 penetrating the plate 148. A sensor rotor support 152 is integrally formed on the first other end plate 148. Further, an inclined surface 144A for introducing a shaft member is formed on the outer surface on the proximal end side of the mounting projection 144.

  Further, a cylindrical bearing support portion 154 projects from the inner surface of the cover member 20 in the axial direction of the motor rotor shaft 30. On the inner peripheral surface of the bearing support portion 154, an inner peripheral side cover side sealing step 156 and an outer peripheral side cover side bearing step 158 are formed.

  As shown in FIG. 1, a bearing holding portion 160 is integrally provided on the third partition wall 38 of the motor case 10. The bearing holding portion 160 includes a center holding portion 162 and a first bearing holding portion 164 having a predetermined length L1 extending from the center holding portion 162 in the first motor chamber 46 in the axial direction of the motor rotor shaft 30. And a second bearing holding portion 166 having a predetermined length L2 extending in the second motor chamber 48 from the central holding portion 162 in the axial direction of the motor rotor shaft 30.

  The first bearing holding portion 164 is provided with a first introduction portion 168 that extends in a direction away from the third partition wall 38 and has a first introduction inclined surface 168A. The second bearing holding portion 166 is provided with a second introduction portion 170 that extends in a direction away from the third partition wall 38 and has a first introduction inclined surface 170A.

  A first bearing step 172 is formed at the central portion of the inner peripheral surface of the center holding portion 162, and the first bearing step 172 is continuous with the first bearing step 172 toward the second bearing holding portion 166. A sealing step 174 is formed, and a member engaging step 176 is formed closer to the second bearing holding portion 166 than the first sealing step 174. Further, on the outer peripheral surface of the second bearing holding portion 166, a second bearing step portion 178 is formed on the center holding portion 162 side, and a retaining ring groove 180 is formed at a site of the second introduction portion 170. ing. The front end side of the one-side rotor bearing portion 136 of the rotor-side bearing portion 130 is locked to the member engaging step 176 in the assembled state.

  As shown in FIG. 3, the second motor generator 120 is mainly used for driving. The second motor rotor 184 is fixed to the outer peripheral surface of the second rotor shaft member 182, and the motor is opposed to the second motor rotor 184. The second motor stator 186 is fixed to the inner peripheral surface of the second case portion 10-2 of the case 10. The second motor rotor 184 is formed by laminating silicon steel plates into which permanent magnets (not shown) are inserted, and is held by the motor rotor shaft 30 that penetrates the third partition wall 38.

  The second rotor shaft member 182 has a function as an output shaft of the second motor generator 120, and the end on the engine 2 side is connected to the second ring gear 94 of the second planetary gear train 78 by a fixing means such as welding. A second rotor installation portion 188 for installing the second motor rotor 184 is provided on the outer peripheral surface.

  The second rotor installation portion 188 includes a second mounting projection 190 of the second rotor shaft member 182, a second motor rotor 184, and second first side end plates 192 and second others at both ends of the second motor rotor 184. The second motor rotor 184 is attached by a second rotor attachment bolt 196 penetrating the side end plate 194.

  On the inner peripheral surface of the second motor shaft member 182, a second one-side bearing step 198 is formed on the side away from the engine 2, and a second other-side bearing step 200 is formed on the engine 2 side. Is formed.

  Further, either one of the first bearing holding portion 164 or the second bearing holding portion 166 is extended to the outer peripheral side of the corresponding rotor shaft member, and the remaining other bearing holding portion is made to correspond. Extending to the inner peripheral side of the rotor shaft member. That is, in this embodiment, as shown in FIG. 1, the second bearing holding portion 166 extends to the inner peripheral side of the second rotor shaft member 182, and the first bearing holding portion 164 is extended to the first rotor shaft member 122. It was made to extend to the outer peripheral side.

  The first rotor shaft member 122 that fixes the first motor rotor 124 is held by the first bearing holding portion 164 via the first bearing 202. In the first bearing 202, the inner ring is locked to the one-side bearing step part 140 of the outer peripheral surface of the one-side rotor bearing part 136 of the first rotor shaft member 122, and the outer ring is the first bearing of the bearing holding part 160. The first bearing step 172 of the holding part 164 is provided to be locked. Further, at this time, the oil is prevented from flowing out between the outer peripheral surface of the one-side rotor bearing portion 136 and the first sealing step 174 on the inner peripheral surface of the central holding portion 162 of the bearing holding portion 160. A seal member 204 is provided.

  In addition, the inner ring of the cover-side bearing 206 is engaged with and provided on the other-side bearing step 142 of the outer peripheral surface of the other-side rotor bearing portion 138 of the first rotor shaft member 122. The outer ring of the cover side bearing 206 is provided to be engaged with the cover side bearing step 158 of the bearing support portion 154. At this time, a cover-side seal member 208 that prevents oil from flowing out is provided between the outer peripheral surface of the other-side rotor bearing portion 138 and the cover-side seal step 156 of the bearing support portion 154.

  The second rotor shaft member 182 that fixes the second motor rotor 184 is held by the second bearing holding portion 166 via the second one-side bearing 210 and the second other-side bearing 212.

  In the second one-side bearing 210, the inner ring is locked to the second bearing step 178 at the outer peripheral surface of the second bearing holding portion 166, and the outer ring is the second first of the inner peripheral surface of the second rotor shaft member 182. The side bearing step 198 is provided to be locked.

  Further, a second other-side bearing 212 that is engaged with the second other-side bearing step 200 on the inner peripheral surface of the second rotor shaft member 182 is provided on the outer peripheral surface of the second bearing holding portion 166. The end surface of the second other side bearing 212 on the engine 2 side is held by a stop ring 214 attached to the stop ring groove 180.

  Further, between the outer peripheral surface of the second bearing holding portion 166 as the remaining other bearing holding portion and the inner peripheral surface of the second rotor shaft member 182, on the engine 2 side than the second other-side bearing 212, A second seal member 216 that prevents oil from flowing out is provided.

  Accordingly, the first introduction part 168 extends beyond the first bearing 202 to the inside of the first motor chamber 46, and the second introduction part 170 includes the second one-side bearing 210 and the second other-side bearing 212. It extends beyond the second motor chamber 48 beyond.

  The driving device 4 is provided with first and second rotational position detection mechanisms (rotation sensors: resolvers) 218 and 220 that detect the rotation of the first and second motor generators 118 and 120.

  As shown in FIG. 2, the first rotational position detection mechanism 218 is disposed in the first motor chamber 46 and has a magnetic shield function that blocks magnetic flux leaking from the first motor generator 118, radio wave noise, and the like. The first sensor stator 224 is fixed to the cover member 20 via 222, and the first sensor rotor 226 is fixed to the sensor rotor support 152 so as to face the first sensor stator 224.

  As shown in FIG. 3, the second rotational position detection mechanism 220 is disposed in the second motor chamber 46 and has a magnetic shielding function that blocks magnetic flux leaking from the second motor generator 120, radio wave noise, and the like. The second sensor stator 230 is fixed to the plate 16 via 228, and the second sensor rotor 232 is fixed to the second rotor shaft member 182 so as to face the second sensor stator 230.

  When the first motor generator 118 and the second motor generator 120 are installed in the housing 6, as shown in FIG. 1, the first motor shaft 124 and the first motor rotor 124, the first one side, the first other, etc. The first assembly component 234 in which the side end plates 146 and 148, the first sensor rotor 226, the first bearing 202, and the cover side bearing 206 are assembled is inserted from the side away from the engine 2, and the second rotor shaft Second assembly in which the second motor rotor 184, the second one side / second other side end plates 192, 194, the second sensor rotor 232, the second first side, and the twenty-first other side bearings 210, 212 are assembled to the member 182. The structural body 236 is inserted from the engine 2 side. At this time, the end portions of the motor rotors 124 and 184 overlap the end portions of the motor stators 126 and 186 because the bearing holding portions 164 and 166 have the predetermined lengths L1 and L2.

  In the hybrid vehicle, the power split mechanism 54 splits and transmits the driving force generated by the engine 2 to the first motor generator 118 and the axle 74 that is the drive shaft on the differential 56 side. The second motor generator 120 functions as an electric motor and generates auxiliary power for driving the axle 74 separately from the engine 2. In the driving device 4, one of the divided driving forces of the power split mechanism 54 is mechanically transmitted to rotate the axle 74, and the other driving force is transmitted to the first motor generator 118, and this driving force is transmitted. Accordingly, first motor generator 118 functions as a generator, and the generated electric power is supplied to second motor generator 120. When the second motor generator 120 functions as an electric motor in response to the supply of electric power, the driving force generated by the second motor generator 120 is added to one driving force by the power split mechanism 54, and the output to the engine 2 is assisted. The

  As shown in FIG. 3, a third seal member 238 is provided between the inner peripheral surface of the second partition wall 34 and the outer peripheral surface of the end of the second rotor shaft member 182 on the engine 2 side. .

  Next, the operation of the first embodiment will be described.

  When the first motor generator 118 and the second motor generator 120 are installed in the housing 6, as shown in FIG. 1, the first motor rotor 124 and the first one side / first other side end are disposed on the first rotor shaft member 122. A first assembly component 234 in which the plates 146 and 148, the first sensor rotor 226, the first bearing 202 and the cover-side bearing 206 are assembled is inserted from the side away from the engine 2. At this time, the end of the first motor rotor 124 overlaps with the end of the first motor stator 126 because the first bearing holding portion 164 has a predetermined length, and the end of the first insertion portion 168 The peripheral surface is in contact with the outer peripheral surface of the outer ring of the first bearing 202, and the first rotor shaft member 122 can be smoothly inserted, and the first motor rotor 124 can be easily centered.

  The second rotor shaft member 182 includes the second motor rotor 184, the second one side / second other side end plates 192, 194, the second sensor rotor 232, the second one side, and the twenty-first other side bearings 210, 212. The assembled second assembled component 236 is inserted from the engine 2 side. At this time, the end of the second motor rotor 184 overlaps the end of the second motor stator 186 because the second bearing holding portion 166 has a predetermined length, and the outer periphery of the second insertion portion 170 The surface is in contact with the inner peripheral surface of the inner ring of the second one-side bearing 210, so that the second rotor shaft member 182 can be smoothly inserted, and the centering of the second motor rotor 184 is facilitated.

  Accordingly, in each of the two motor generators 118 and 120, the respective bearing holding portions 164 and 166 of the motor case 10 are provided with the lengths of the introduction portions 168 and 170 to be drawn, and the bearings 202, 210, and 212 are provided. The positions of the bearing holding portions 164 and 166 and the introduction portions 168 and 170 are set in the motor case 10 of the components 234 and 236. Since the end portions of the motor rotors 124 and 184 of the motor generators 118 and 120 are in the vicinity of the end portions of the motor stators 126 and 186 at the time of insertion into the motor, the motors incorporating the motor stators 126 and 186 When assembled in the case 10, the bearings are drawn before being pulled by the magnetic force of the magnets of the motor rotors 124 and 184. Since the inner ring or the outer ring of 02, 210, 212 starts to be regulated by the motor case 10, it is possible to reduce the fear that the inner ring or the outer ring is suddenly drawn and the possibility of being attracted to the motor stators 126, 186. It can be simple. Further, in each motor generator 118, 120, each bearing holding portion 164, 166 and each introduction portion 168, 170 are used as an attachment portion of the oil first seal member 204 for oil filling, so that the space can be effectively used. Can be planned.

  As a result, the bearing holding portion 160 is provided integrally with the third partition wall 38 as the partition wall, and the first bearing holding portion 164 and the second motor chamber extending the bearing holding portion 160 into the first motor chamber 46. Each of the bearing holding portions 164 and 166 is provided with introduction portions 168 and 170 extending in a direction away from the third partition wall 38, and The first rotor shaft member 122 that fixes the one motor rotor 124 is held by the first bearing holding portion 164 via the first bearing 202 and the second rotor shaft member 182 that fixes the second motor rotor 184 is held by the second bearing holding portion 166. In this case, the motor rotors 124 and 184 are fixed by using the introduction portions 168 and 170 of the bearing holding portion 160 integral with the third partition wall 38. The respective rotor shaft members 122, 182 are held by the respective bearing holding portions 164, 166 via the respective bearings 202, 210, 212 to facilitate the centering of the respective motor rotors 124, 184, and the assembly of the respective motor rotors 124, 184. The process can be simplified.

  Also, each introduction portion 168, 170 is elongated to a predetermined length and extends inside each motor chamber 46, 48 beyond each bearing 202, 210, 212, thereby each motor rotor 124, 184. Assembling can be further simplified.

  Furthermore, either one of the first bearing holding portion 164 or the second bearing holding portion 168 is extended to the outer peripheral side of the corresponding rotor shaft member, and the first bearing holding portion 164 or the second bearing holding is extended. The remaining other bearing holding portion of the portion 168 is extended to the inner peripheral side of the corresponding rotor shaft member, and the remaining first bearing holding portion holds the first seal member 204 that prevents oil from flowing out. Since the first seal step 174 is provided, the bearings are respectively extended from the front side and the rear side of the third partition wall 38 using the first seal step 174 that holds the first seal member 204. The rigidity of the holding portions 164 and 166 can be improved.

  Furthermore, by extending the second bearing holding portion 168 to the inner peripheral side of the second rotor shaft member 182 and extending the first bearing holding portion 164 to the outer peripheral side of the first rotor shaft member 182, Since the second motor generator 120 on the drive side is generally larger in size, this can be accommodated.

  In addition, the second motor generator 120 is disposed on the power distribution mechanism 54 side, and the first motor generator 118 is disposed on the cover portion 20 side that closes the motor case 10, so that the second motor on the drive side is provided. The generator 120 can be brought close to the power distribution mechanism 54 side to simplify the configuration of the coupling mechanism with the output side.

  7 and 8 show a second embodiment of the present invention.

  In the following embodiments, portions having the same functions as those of the first embodiment will be described with the same reference numerals.

  The features of the second embodiment are as follows. In other words, on the first motor generator 118 side, the end of the motor output shaft 1128 on the side away from the engine 2 extends to the vicinity of the cover member 20, and one end of the connecting member 302 is fitted to the outer peripheral portion of this end. The other end side of the connecting member 302 is fitted and connected to the inner peripheral portion of the first rotor shaft member 122.

  Further, between the outer peripheral surface of the first bearing holding portion 164 and the inner peripheral surface of the first motor rotor 124, the first one side and the first other side bearings 304 and 306 are provided at a predetermined interval. Further, between the outer peripheral surface of the second bearing holding portion 166 and the inner peripheral surface of the second motor rotor 186, the second first side and second other side bearings 308 and 310 are provided at a predetermined interval.

  Further, on the second motor generator 120 side, the second ring gear 94 is detachably attached to the second rotor shaft member 182 via the hub 312 by means of attachment bolts 314.

  In the first rotational position detection mechanism 218, the first sensor stator 214 is held by the cover member 20 and the first adapter 222 and attached to the cover member 20. A first sensor rotor 216 is fixedly provided on the outer peripheral surface of the first rotor shaft member 122 so as to face the first sensor stator 214.

  In the second rotational position detection mechanism 220, the second sensor stator 230 is held by the third partition wall 38 and the second adapter 228 and attached to the third partition wall 38. A second sensor rotor 232 is fixedly provided on the outer peripheral surface of the second rotor shaft member 182 so as to face the second sensor stator 230.

  According to the configuration of the second embodiment, the same effect as that of the first embodiment described above can be obtained, and the drive device 4 in which the connecting member 302 is disposed between the motor output shaft 128 and the first rotor shaft member 122. With this structure, even when the first rotor shaft member 122 is shaped to be easily processed and the first sensor rotor 226 is fixed to the first rotor shaft member 122, workability is improved when the first rotor shaft member 122 is processed. There is no hindrance.

  FIG. 9 shows a special configuration of the present invention and shows a third embodiment.

  The features of the third embodiment are as follows. That is, the first rotor shaft member 122 is formed with a holding portion 352 oriented in the axial direction inside the mounting projection 144, and the outer ring of the first bearing 202 is formed on the inner peripheral surface of the holding portion 352. A step portion 354 is formed. Further, the first bearing holding portion 164 of the third partition wall 38 is formed so as to be oriented in the axial direction so as to hold the inner ring of the first bearing 202, and includes a step portion 356 for the inner ring of the first bearing 202. Yes.

  According to the configuration of the third embodiment, when the first and second assembled components 234 and 236 are assembled, the first bearing 202 and the second bearing are formed on the outer peripheral surfaces of the first and second bearing holding portions 164 and 166. Since only the one-side bearing 210 and the second other-side bearing 212 need be fitted, the assembling procedure can be simplified.

  A structure that facilitates centering of the motor rotor by holding the rotor shaft member, to which the motor rotor is fixed, through the bearing by using the introduction portion of the bearing holding portion integral with the partition wall. It can also be applied to.

It is explanatory drawing of the state which assembled | attaches each motor generator in 1st Example. FIG. 5 is a partially enlarged half sectional view of the hybrid drive device of FIG. 4 on the first motor generator side in the first embodiment. FIG. 5 is a partially enlarged half sectional view on the second motor generator side of the hybrid drive device of FIG. 4 in the first embodiment. It is sectional drawing of a hybrid drive device in 1st Example. It is a figure explaining the power split mechanism of a hybrid drive device in 1st Example. It is a figure explaining the flow of the driving force of a hybrid drive device in 1st Example. FIG. 9 is a partially enlarged half sectional view of the hybrid drive device of FIG. 8 in the second embodiment. It is sectional drawing of a hybrid drive device in 2nd Example. It is explanatory drawing of the state which each motor generator is assembled | attached in 3rd Example. It is sectional drawing of the conventional hybrid drive device.

Explanation of symbols

2 Engine 10 Motor case 38 Third partition wall 46 First motor chamber 48 Second motor chamber 54 Power split mechanism 76 First planetary gear train 78 Second planetary gear train 118 First motor generator 120 Second motor generator 122 First rotor Shaft member 124 First motor rotor 126 First motor stator 160 Bearing holding portion 164 First bearing holding portion 166 Second bearing holding portion 168 First introduction portion 170 Second introduction portion 172 First bearing step portion 174 First seal step 178 Second bearing step 182 Second rotor shaft member 184 Second motor rotor 186 Second motor stator 202 First bearing 204 First seal member 206 Cover side bearing 210 Second one side bearing 212 Second other side bearing 216 First 2 seal member 234 1st assembly structure 236 2nd assembly structure

Claims (1)

An engine and a plurality of motor generators are mounted on a vehicle as a drive source , and the plurality of motor generators are a first motor generator composed of a first motor rotor and a first motor stator, a second motor composed of a second motor rotor and a second motor stator. constituted by a generator, disposed in the motor casing side by side the second motor-generator and the first motor-generator coaxially, the inside of the motor case between the first motor generator and the second motor-generator first A partition wall that divides the motor case and the second motor chamber is provided, and the first motor stator and the second motor stator are respectively separated from the inner peripheral surface of the motor case on the first motor chamber side and the second motor chamber. A first bearing holding portion fixed to the inner peripheral surface on the side and extending into the first motor chamber on the partition wall; and the second A second bearing holding portion extending to the data chamber, and a first rotor shaft member attached to a radially inner side of the first motor rotor is disposed on the inner periphery of the first bearing holding portion via the first bearing. A hybrid vehicle drive device that rotatably holds a second rotor shaft member attached to the radially inner side of the second motor rotor on the outer periphery of the second bearing holding portion via a second bearing. The first bearing is disposed in a portion where the first rotor shaft member is protruded in the axial direction from the end of the first motor rotor toward the partition wall, and the first bearing is disposed on the first rotor shaft. When the first motor rotor is inserted into the inner periphery of the first motor stator from the opposite side of the partition wall while being attached to the outer periphery of the member and the outer periphery of the first bearing is held by the first bearing holding portion, the first motor rotor is Inner circumference of the first motor stator Driving device for a hybrid vehicle, wherein the first inlet portion fitted with the outer periphery of the first bearing at the inner circumference of the first motor stator before begins to enter that provided at the end of the first bearing holder.

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