JP2006232005A - Hybrid drive device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To attain miniaturization of a hybrid drive device and facilitate its manufacture and assembly. <P>SOLUTION: This hybrid drive device is comprised of: a power distribution mechanism, a first motor generator, a second motor generator and an output member, mounted on an input shaft connected to an engine. A sun gear of planet gear train comprising the power distribution mechanism, a carrier and a ring gear are individually connected to the first motor generator, the engine and the second motor generator, and the output member is directly connected or connected through a gear train to the ring gear so that the output member can be rotated in the same direction as the ring gear. A through hole having a stepped portion is formed around an inner periphery of the motor rotor of the second motor generator, and the ring gear is removably mounted onto a major diameter section linked to the step part of the through hole. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a hybrid drive device. In particular, the ring gear of the power distribution mechanism of the hybrid drive device can be detachably attached to the motor rotor to facilitate manufacture and assembly, and the power distribution mechanism is arranged in the motor rotor. The present invention relates to a hybrid drive device that can reduce the size of the hybrid drive device.

  In recent years, vehicles are equipped with a hybrid drive device that combines an engine that generates power by burning fuel and an electric motor such as a motor that generates power by electricity due to problems such as environmental problems and energy saving. A hybrid electric vehicle that travels by selecting an efficient driving means is produced.

A hybrid drive device mounted on a hybrid electric vehicle includes an engine that operates by combustion of fuel, a power distribution mechanism that mechanically distributes a driving force output from the engine to a first motor generator and an output member, and the output In a hybrid drive device having a second motor generator for applying a rotational force between a member and a drive wheel, starting the engine by rotating the engine through the power distribution mechanism by the first motor generator Some have means.
JP-A-9-170533

  By the way, in a conventional hybrid drive device, a power distribution mechanism, a first motor generator, a second motor generator, and an output member are arranged on an input shaft connected to an engine, and the power distribution mechanism is a planetary gear train. And the sun gear, the carrier, and the ring gear of the planetary gear train are connected to the first motor generator, the engine, and the second motor generator, respectively, and the output member is connected to the ring gear directly or via the gear train. Some are connected to rotate in the same direction.

  The planetary gear train that constitutes the power distribution mechanism of the hybrid drive device often employs a helical gear because of its quietness, but there is a problem that it is difficult to process the ring gear.

  In the conventional hybrid drive device, the ring gear of the planetary gear train constituting the power distribution mechanism and the motor rotor of the motor generator are manufactured separately, and the ring gear is joined to the motor rotor by welding with an electron beam or the like.

  However, since the implementation of electron beam welding requires a high level of technology, it is difficult to incorporate it into the manufacturing process, and the manufacturing process is complicated, resulting in an increase in cost.

  In addition, when the ring gear joined to the motor rotor by electron beam welding is damaged, only the ring gear cannot be attached or detached. Furthermore, when assembling the motor generator, the ring gear joined to the motor rotor interferes with a jig for inserting the motor rotor, making it difficult to install the jig, resulting in a problem that assembly workability is lowered.

  According to the present invention, a power distribution mechanism, a first motor generator, a second motor generator, and an output member are disposed on an input shaft connected to an engine, and the power distribution mechanism is constituted by a planetary gear train. A sun gear, a carrier, and a ring gear in a row are connected to the first motor generator, the engine, and the second motor generator, respectively, and the output member is rotated in the same direction directly or via the gear train. A through hole having a step portion is formed in the inner periphery of the motor rotor of the second motor generator, and the ring gear is detachably attached to a large diameter portion connected to the step portion of the through hole. It is characterized by.

  The hybrid drive device of this invention forms a through-hole having a step portion on the inner periphery of the motor rotor of the second motor generator, and a ring gear of a planetary gear train that constitutes a power distribution mechanism at a large-diameter portion connected to the step portion of the through-hole. Since the ring gear of the power distribution mechanism does not need to be fixed to the motor rotor by electron beam welding, the manufacturing of the motor rotor can be facilitated and the cost can be reduced, and the motor rotor and the ring gear can be detached. Therefore, when assembling the motor rotor and power distribution mechanism to the housing of the hybrid drive device, the assembly work of the motor rotor to the housing and the assembly work of the ring gear to the motor rotor can be performed independently, respectively. In addition, the power distribution in the motor rotor can be improved. By being arranged mechanism, it can reduce the size of the hybrid drive system.

The hybrid drive device according to the present invention facilitates manufacture of the motor rotor by detachably mounting the ring gear of the planetary gear train constituting the power distribution mechanism to the motor rotor of the second motor generator, and the motor rotor is assembled to the housing. This makes it possible to perform the work and the work of assembling the ring gear to the motor rotor independently, thereby improving the workability of the work.
Embodiments of the present invention will be described below with reference to the drawings.

  1 to 10 show an embodiment of the present invention. In FIG. 10, 2 is a hybrid drive unit mounted on a vehicle such as a hybrid electric vehicle (not shown), 4 is an engine, 6 is a transmission unit, and 8 is a motor unit.

  The engine 4 is provided with an inner periphery of a flywheel 14 attached to an end of a crankshaft 12 pivotally supported by a cylinder block 10 by a mounting bolt 16, and an outer periphery of a damper 18 for adjusting torque fluctuation is attached to an outer periphery of the flywheel 14. 20 is attached.

  The transmission unit 6 is provided with a transmission case 22. The speed change case 22 includes first and second case portions 24 and 26 and includes first and second case wall portions 28 and 30. The transmission case 22 defines a flywheel chamber 32 that houses the flywheel 14 between the first case wall 28 and the cylinder block 10 of the engine 4, and the first case wall 28 and the second case wall A transmission chamber 34 that accommodates an output gear 76 and an intermediate gear 80, which will be described later, is defined between the transmission gear 30 and the transmission gear 30. In addition, the transmission case 22 is formed continuously with the transmission chamber 34 and defines a differential chamber 36 that houses a differential 92 described later between the first case wall 28 and the second case wall 30. .

  The motor unit 8 is provided with a motor housing 38. The motor housing 38 includes a housing part 40 and an end plate part 42, and the housing part 40 has a housing wall part 44. The motor housing 38 defines a first motor chamber 46 that houses a first motor generator 142 (to be described later) between the end plate portion 42 and the housing wall portion 44, and the housing wall portion 44 and the second of the transmission case 22. A second motor chamber 48 for accommodating a later-described second motor generator 144 is defined between the case wall portion 30 and the case wall portion 30.

  The transmission unit 6 includes an input shaft 50. The input shaft 50 is supported at one end side by a bearing 52 at the center of the flywheel 14 at the end of the crankshaft 12 and connected to the inner periphery of the damper 18, and near the one end side by the bearing 54 at the first case wall 28. It is pivotally supported, the middle is inserted through the second case wall 30 and the housing wall 44, and the other end is pivotally supported by the end plate part 42.

  Further, as shown in FIG. 5, the input shaft 50 is provided with a one-way clutch 56 adjacent to a bearing 54 near one end side. The one-way clutch 56 allows the input shaft 50 to rotate only in the normal rotation direction of the engine 4. The one-way clutch 56 is attached to the first case wall 28 with a mounting bolt 60 in a state of being housed in the one-way clutch holder 58.

  As shown in FIG. 9, an oil pump 62 is provided on the end plate portion 42 that pivotally supports the other end side of the input shaft 50. The oil pump 62 is provided with a pump housing 64 in the end plate portion 42, and a pump rotor 68 rotated by the input shaft 50 is rotatably provided in a pump chamber 66 in the pump housing 64, and the pump chamber 66 and the pump rotor 68 are provided. The pump plate 70 is attached to the end plate portion 42 with attachment bolts 72 so as to cover it. The oil pump 62 lubricates an output gear 76 and first and second planetary gear trains 100 and 102, which will be described later, via an oil passage 74 in the input shaft 50.

  As shown in FIG. 5, an output gear 76 that is an output member for outputting the power of the engine 4 to drive wheels (not shown) is provided in the transmission chamber 34 of the transmission unit 6. The output gear 76 is mounted on the outer periphery of the one-way clutch holder 58 with a bearing 78 fitted on the inner periphery thereof, and is pivotally supported on the outer periphery of the one-way clutch holder 58. The output gear 76 is meshed with the intermediate gear 80. The intermediate gear 80 is attached to an intermediate shaft 86 that is supported by bearings 82 and 84 on the first and second case wall portions 28 and 30.

  A final reduction drive gear 88 is provided on the intermediate shaft 86. A final reduction driven gear 90 is engaged with the final reduction drive gear 88. The final reduction driven gear 90 is attached to a differential 92 accommodated in the differential chamber 36. The differential 92 is pivotally supported by bearings 94 and 96 on the first and second case wall portions 28 and 30 and communicates with one end side of a drive axle (not shown). A driving wheel (not shown) is provided on the other end side of the driving axle.

  The input shaft 50 is provided with a power distribution mechanism 98 adjacent to the output gear 76. The power distribution mechanism 98 includes first and second planetary gear trains 100 and 102 as shown in FIGS.

  The first planetary gear train 100 is disposed on the transmission chamber 34 side, and includes a first sun gear 106 supported on the outer periphery of the input shaft 50 by a bearing 104, and a first carrier 108 fixed to the outer periphery of the input shaft 50. The first pinion gear 112 is supported by the support shaft 110 and meshes with the first sun gear 106, and the first ring gear 114 meshes with the first pinion gear 112.

  The first sun gear 106 is provided such that the end of the transmission chamber 34 is brought into contact with the first carrier 108 via the thrust bearing 116 and one end of the extension cylinder portion 118 is connected to the end of the second motor chamber 48. As shown in FIG. 9, the extension cylinder portion 118 extends at the other end to the vicinity of the end plate portion 42, and is supported by the bearing 120 on the outer periphery of the input shaft 50 in the vicinity of the end plate portion 42. The first ring gear 114 is connected to the output gear 76 so as to rotate in the same direction as the output gear 76.

  The second planetary gear train 102 is disposed on the second motor chamber 48 side, is connected to the outer periphery of the first sun gear 106 so as to rotate in the same direction as the first sun gear 106, and a first carrier. The second pinion gear 130 that is supported by the second support shaft 128 of the second carrier 126 that is connected to the first carrier 108 by the connecting bolt 124 (see FIG. 10) and meshes with the second sun gear 122, and meshes with the second pinion gear 130. And a second ring gear 132.

  The second sun gear 122 has a stopper 134 in contact with the end of the second motor chamber 48. The stopper 134 is fixed to the first sun gear 106 and is in contact with the second carrier 126 via a thrust bearing 136. The second pinion gear 130 is disposed coaxially with the first pinion gear 112. The second ring gear 132 is provided with a bolt insertion hole 138 as shown in FIG. The second ring gear 132 is detachably attached to the second stepped portion 194 of the second rotor shaft 188 of the second motor generator 144 described later together with the hub 224 described later by the mounting bolt 140 inserted through the bolt insertion hole 138. Yes.

  The motor unit 8 includes a first motor generator 142 housed in the first motor chamber 46 and mainly used for power generation, and a second motor generator 144 housed in the second motor chamber 48 and mainly used for driving. Yes.

  The first motor generator 142 includes a first motor stator 146 and a first motor rotor 148, as shown in FIG. The first motor stator 146 is attached to the first motor stator attachment portion 150 on the inner periphery of the housing portion 40 in the first motor chamber 46. The first motor rotor 148 is disposed so as to face the inner periphery of the first motor stator 146, and is attached to the cylindrical first rotor shaft 152.

  The first rotor shaft 152 is provided by forming an annular groove-shaped first motor rotor attachment portion 154 for attaching the first motor rotor 148 to the outer periphery, and forming a first through hole 156 on the inner periphery. The first rotor shaft 152 is provided with a first step 158 formed at the end of the first through hole 156 on the end plate portion 42 side, and the cylindrical portion 160 is provided on the housing step 44 side of the first step 158. The first sensor rotor mounting portion 162 is provided so as to protrude from the first step portion 158 toward the end plate portion 42 side.

  The first motor rotor 148 is attached to the first motor rotor attachment portion 154 by being sandwiched between first rotor end plates 164. In the first through hole 156, a first support cylinder portion 166 provided so as to protrude from the center side end of the housing wall portion 44 toward the end plate portion 42 side is inserted into the first step portion 158. The first rotor shaft 152 has two bearings 168 and 170 fitted into the first through hole 156 of the cylindrical portion 160 mounted on the outer periphery of the first support cylindrical portion 166, and is rotatable to the outer periphery of the first support cylindrical portion 166. It is pivotally supported.

  The first motor generator 142 includes a first rotation sensor (resolver) 172 that detects the angular position of the first motor rotor 148. The first rotation sensor 172 includes a first sensor stator 174 and a first sensor rotor 176. The first sensor stator 174 is attached to the first sensor stator attachment part 178 of the end plate part 42. The first sensor rotor 176 is attached to the outer periphery of the first sensor rotor attachment portion 162 of the first rotor shaft 148.

  The outer periphery of a ring-shaped connecting member 180 is connected to the inner periphery of the first sensor rotor mounting portion 162 of the first rotor shaft 152. The connecting member 180 has an inner periphery connected to an outer periphery of the end of the extension cylinder portion 118 on the end plate portion 42 side. The first motor rotor 148 and the first and second sun gears 106 and 122 are coupled to rotate in the same direction via the connecting member 180 and the extension cylinder portion 118.

  As shown in FIG. 8, the second motor generator 144 includes a second motor stator 182 and a second motor rotor 184. The second motor stator 182 is attached to a second motor stator attachment portion 186 on the inner periphery of the housing portion 40 in the second motor chamber 48. The second motor rotor 184 is disposed so as to face the inner periphery of the second motor stator 182 and is attached to a cylindrical second rotor shaft 188. The second motor generator 144 is formed so that the inner diameters of the second motor stator 182 and the second motor rotor 184 are enlarged and made thin while extending in the axial direction so that the motor output does not decrease.

  As shown in FIG. 4, the second rotor shaft 188 is provided with an annular groove-shaped second motor rotor mounting portion 190 for mounting the second motor rotor 184 on the outer periphery, and a second through hole 192 formed on the inner periphery. Provided. The second rotor shaft 188 is provided with a second step portion 194 formed in the second through hole 192, a large diameter portion 196 is provided on the second case wall portion 30 side of the second step portion 194, and the second rotor shaft 188 is provided with the second step portion 194. A small diameter portion 198 is provided on the housing wall 44 side of the stepped portion 194, and the second sensor rotor mounting portion 200 is provided so as to protrude from the small diameter portion 198 toward the housing wall 44.

  The second step portion 194 is provided with a bolt screw hole 202 in the axial direction. On the second rotor shaft 188, the second ring gear 132 and a hub 224, which will be described later, are disposed in the axial direction in the large-diameter portion 196 on the inner periphery of the thin second motor rotor 184. A second ring gear 132 and a hub 224 are detachably mounted on the second rotor shaft 188 by inserting the mounting bolts 140 into the bolt insertion holes 138 and 232 and screwing them into the bolt screw holes 202. .

  A bearing holding hole 204 that opens to the second stepped portion 194 is formed on the inner periphery of the small diameter portion 198. On the inner periphery of the second sensor rotor mounting portion 200, a bearing holding hole 206 that opens at the housing wall 44 side end is formed.

  The second motor rotor 184 is attached to the second motor rotor attachment portion 190 by being sandwiched between second rotor end plates 208. A second support cylinder portion 210 that protrudes from the center side end of the housing wall portion 44 toward the second case wall portion 30 side is inserted into the second through hole 192 to the second step portion 194. The second rotor shaft 188 has a bearing 212 fitted in the bearing holding hole 204 of the small diameter part 198 and a bearing 214 fitted in the bearing holding hole 206 of the second sensor rotor mounting part 200 mounted on the outer periphery of the second support cylinder part 210. In addition, the second support cylinder portion 210 is rotatably supported on the outer periphery.

  The second motor generator 144 includes a second rotation sensor (resolver) 216 that detects the angular position of the second motor rotor 184. The second rotation sensor 216 includes a second sensor stator 218 and a second sensor rotor 220. The second sensor stator 218 is attached to the second sensor stator attachment portion 222 of the housing wall 44. The second sensor rotor 220 is attached to the outer periphery of the second sensor rotor attachment portion 200 of the second rotor shaft 188.

  Between the second stepped portion 194 of the second rotor shaft 188 and the second ring gear 132, the first and second planetary gear trains 100 and 102 constituting the power distribution mechanism 98 are positioned in the axial direction. The hub 224 is sandwiched. As shown in FIG. 4, the hub 224 includes an outer cylinder part 226, an intermediate part 228, and an inner cylinder part 230.

  The outer cylindrical portion 226 is formed in a cylindrical shape that is sandwiched between the second ring gear 132 and the second stepped portion 194. From the inner periphery of the outer cylinder part 226, the intermediate part 228 is connected to the second case wall part 30 side end of the second support cylinder part 210 and the second support cylinder part 210 facing surface of the stopper 134 in contact with the second sun gear 122. It is formed in the shape of an annular plate that extends toward the outer periphery of the extension cylinder part 118. The inner cylinder portion 230 has an end portion of the first support cylinder portion 166 between the inner periphery of the intermediate portion 228 on the side facing the second support cylinder portion 210 and between the inner periphery of the second support cylinder portion 210 and the outer periphery of the extension cylinder portion 118. It is formed in the cylindrical shape extended to the part vicinity.

  The hub 224 has a bolt insertion hole 232 in the outer cylinder portion 226. The hub 224 is in contact with the second ring gear 132 on one end side in the axial direction of the outer cylinder portion 226, and is in contact with the second stepped portion 194 at the other end side in the axial direction of the outer cylinder portion 226, and the bearing of the small diameter portion 198. It abuts on one side of the bearing 212 fitted in the holding hole 204. The hub 224 is inserted into the bolt screw hole 202 of the second step 194 by inserting the mounting bolt 140 inserted into the bolt insertion hole 138 of the second ring gear 132 into the bolt insertion hole 232 of the outer cylinder part 226. The mounting bolt 140 sandwiches the second stepped portion 194 of the second rotor shaft 188 of the second motor generator 144 and the second ring gear 132.

  Further, the hub 224 is brought into contact with the stopper 134 via the thrust bearing 234 on the surface facing the first and second planetary gear trains 100 and 102 of the intermediate portion 228, and the inner periphery of the intermediate portion 228 is connected to the extended cylindrical portion 118. The outer periphery of the inner cylindrical portion 230 is axially supported by the bearing 238 and the outer periphery of the inner cylindrical portion 230 is axially supported by the inner periphery of the first support cylindrical portion 166. The hub 224 sandwiched between the second stepped portion 194 of the second rotor shaft 188 and the second ring gear 132 is positioned in the axial direction of the first and second planetary gear trains 100 and 102 by contact with the stopper 134. I do.

  Next, the operation of this embodiment will be described.

  As shown in FIG. 3, the hybrid drive device 2 includes an engine 4 that generates power by burning fuel, a first motor generator 142 that is mainly used for power generation, a second motor generator 144 that is mainly used for driving, A power distribution mechanism 98 composed of the second planetary gear trains 100 and 102 and an output gear 76 that outputs power to drive wheels are combined and mounted on a vehicle such as a hybrid electric vehicle, and the engine 4 and the second motor generator The first motor generator 142 generates electricity while traveling with one or a combination of both.

  The hybrid drive device 2 inputs the power of the engine 4 to the input shaft 50 via a torque fluctuation adjusting damper 18 provided on the flywheel 14 at the end of the crankshaft 12. The input shaft 50 is pivotally supported on the transmission case 22 via a one-way clutch 56 by a bearing 54 so as to be rotatable only in the forward rotation direction of the engine 4. An oil pump 62 is provided at the end of the input shaft 50 on the side away from the engine 4. The oil pump 62 lubricates the output gear 76 and the first and second planetary gear trains 100 and 102 via the oil passage 74 in the input shaft 50.

  The one-way clutch 56 is attached to the transmission case 22 in a state of being housed in the one-way clutch holder 58, and an output gear 76 for outputting a driving force to a driving wheel (not shown) on the outer periphery of the one-way clutch holder 58 is a bearing 78. It is pivotally supported via a shaft. The output gear 76 is decelerated one stage by the intermediate gear 80 of the intermediate shaft 86, and the driving force is transmitted to the driving wheel (not shown) via the differential 92 by the final reduction driving gear 88 and the final reduction driven gear 90.

  The power distribution mechanism 98 includes first and second planetary gear trains 100 and 102. The first and second planetary gear trains 100 and 102 have a structure in which the movement in the thrust direction can be restricted by incorporating the first and second motor generators 142 and 144. A first ring gear 114 of the first planetary gear train 100 on the engine 4 side constituting the power distribution mechanism 98 is fixed to the output gear 76.

  Further, the first and second carriers 108 and 126 of the first and second planetary gear trains 100 and 102 are connected and fixed to the input shaft 50 so as to rotate in the same manner. First and second pinion gears 112 and 130 are rotatable on first and second support shafts 110 and 128 fixed to the first and second carriers 108 and 126, respectively, so as to be prevented from coming off by press-fitting and pinning. Is pivotally supported.

  The first motor generator 142 is mainly used for power generation and is incorporated in the motor housing 38. The first and second sun gears 106 and 122 of the first and second planetary gear trains 100 and 102 are connected to the first rotor shaft 52 of the first motor generator 142 via the connecting member 180 and the extension cylinder portion 118. It is provided on the same axis so as to rotate. A first rotation sensor 172 is incorporated in the first motor generator 142.

  The second motor generator 144 is mainly used for driving, and is incorporated in the motor housing 38. A second ring gear 132 of the second planetary gear train 102 is detachably attached to the second rotor shaft 188 of the second motor generator 144 by a mounting bolt 140 via a hub 224. A second rotation sensor 216 is incorporated in the second motor generator 144.

  As shown in FIG. 1, the hybrid drive device 2 forms a second through hole 192 having a second step portion 194 on the inner periphery of the second motor shaft 188 to which the second motor rotor 184 of the second motor generator 144 is attached. The second ring gear 132 of the second planetary gear train 102 constituting the power distribution mechanism 98 is detachably attached to the large diameter portion 196 connected to the second step portion 194 of the second through-hole 192 by the attachment bolt 140.

  As a result, the hybrid drive apparatus 2 eliminates the need to fix the second ring gear 132 of the power distribution mechanism 98 to the second motor shaft 188 of the second motor rotor 184 by electron beam welding, thereby facilitating the manufacture of the second motor rotor 184. Cost reduction.

  Further, in the hybrid drive device 2, the second motor shaft 188 of the second motor rotor 184 and the second ring gear 132 are detachable, so that the second motor rotor 184, the power distribution mechanism 98, and the motor housing 38 of the hybrid drive device 2 are provided. 2, as shown in FIG. 2, a frustoconical guide jig 242 having a tapered surface 240 is attached to the tip of the second support cylinder portion 210, and the second motor shaft 188 side of the second motor rotor 184 is attached. The pressing jig 244 is attached to the two stepped portions 194 with the mounting bolts 140, and the second motor rotor 184 can be slid and assembled in the axial direction of the second support cylinder portion 210.

  As a result, the hybrid drive device 2 independently performs the assembly work of the second motor rotor 184 to the motor housing 38 and the assembly work of the second ring gear 132 to the second motor shaft 188. As a result, assembly workability can be improved.

  Further, the hybrid drive device 2 can reduce the size of the hybrid drive device 2 by disposing the second planetary gear train 102 constituting the power distribution mechanism 98 in the second motor rotor 184.

  Furthermore, the hybrid drive device 2 includes a hub 224 that positions the first and second planetary gear trains 100 and 102 in the axial direction between the second step portion 194 and the second ring gear 132. The first and second planetary gear trains 100 and 102 can be easily positioned in the axial direction.

  Further, the hybrid drive device 2 forms a second support cylinder portion 210 that protrudes into the second through hole 192 of the second motor shaft 188 in the motor housing 38 that houses the second motor generator 144, and the second through hole 192. Since the small diameter portion 198 connected to the second step portion 194 is supported on the outer periphery of the second support cylinder portion 210 via the bearings 212 and 214, the second support is made using the guide jig 242 and the pressing jig 244. The second motor rotor 184 can be slid and assembled in the axial direction of the cylinder portion 210, so that the assembling workability can be improved and a test jig (not shown) can be easily joined during the motor unit test. Thus, the workability of the motor unit test can be improved.

  Further, in the hybrid drive device 2, a bearing holding hole 204 whose one side opens to the second stepped portion 194 is formed in the small diameter portion 198 of the second through hole 192 of the second motor shaft 188. The bearing 212 can be held in the bearing holding hole 204 by the hub 224 by inserting the hub 212 and abutting the hub 224 on one side of the bearing 212. In this embodiment, the hub 224 is brought into contact with one side of the bearing 212, but the second ring gear 132 can also be brought into direct contact.

  The present invention is not limited to the above-described embodiments, and various application modifications can be made.

  For example, FIG. 11 shows a modification of the hybrid drive device 2. The hybrid drive device 2 includes a shaft-side spline 240 formed on the inner periphery of the large-diameter portion 196 of the second motor shaft 188 of the second motor generator 144 and an engagement groove 242 formed on the opening side of the large-diameter portion 196. A circlip 244 to be engaged with the engagement groove 242 is provided, a gear-side spline 246 is formed on the outer periphery of the second ring gear 132, and a hub-side spline 248 is formed on the outer periphery of the outer cylindrical portion 226 of the hub 224.

  In the hybrid drive device 2, the hub-side spline 248 on the outer periphery of the outer cylindrical portion 226 of the hub 224 is engaged with the shaft-side spline 240 on the inner periphery of the large-diameter portion 196 of the second motor shaft 188, so The gear-side spline 246 on the outer periphery of the second ring gear 132 is engaged with the shaft-side spline 240 on the inner periphery of the large-diameter portion 196 so as to make contact with the outer cylinder portion 226 of the hub 224 and contact with the second ring gear 132. As described above, the circlip 244 is engaged with the engagement groove 242 on the inner periphery of the large-diameter portion 196 of the second motor shaft 188, whereby the hub 224 is connected to the second stepped portion 194 of the second motor shaft 188 and the second ring gear 132. Between them.

  The hybrid drive device 2 has a hub 224 and a second ring gear 132 that are spline-engaged with the large-diameter portion 196 of the second motor shaft 188 and fixed with a circlip 244, so that mounting bolts, bolt insertion holes, The processing of the bolt screw hole can be eliminated.

  The hybrid drive device according to the present invention facilitates the manufacture of the motor rotor, and enables the assembly work of the motor rotor to the housing and the assembly work of the ring gear to the motor rotor, respectively, to improve the assembly workability. It can be applied to a hybrid electric vehicle.

It is an expanded sectional view of the 1st and 2nd motor generator of the hybrid drive device which shows an Example. It is an expanded sectional view at the time of the assembly | attachment of the 2nd motor generator which shows an Example. It is a skeleton figure of the hybrid drive device which shows an Example. It is an expansion half sectional view at the time of the assembly | attachment of the 2nd motor shaft which shows an Example, a hub, a 2nd ring gear, and a mounting bolt. It is an expansion half sectional view of the flywheel and output gear which show an example. FIG. 3 is an enlarged half sectional view of first and second planetary gear trains and an output gear showing an embodiment. It is a skeleton figure of the 1st and 2nd planetary gear train which shows an Example. It is an expansion half sectional view of the 2nd motor generator which shows an example. It is an expansion half sectional view of the 1st motor generator which shows an example. It is sectional drawing of the hybrid drive device which shows an Example. It is an expanded sectional view of the 1st and 2nd motor generator which shows a modification.

Explanation of symbols

DESCRIPTION OF SYMBOLS 2 Hybrid drive device 4 Engine 6 Transmission part 8 Motor part 12 Crankshaft 14 Flywheel 18 Damper 22 Shift case 38 Motor housing 50 Input shaft 76 Output gear 98 Power distribution mechanism 100 1st planetary gear train 102 2nd planetary gear train 106 1st 1 sun gear 112 1st pinion gear 114 1st ring gear 122 2nd sun gear 130 2nd pinion gear 132 2nd ring gear 140 mounting bolt 142 1st motor generator 144 2nd motor generator 172 1st rotation sensor 182 2nd motor stator 184 2nd motor rotor 192 Second through hole 194 Second step portion 196 Large diameter portion 198 Small diameter portion 204 Bearing holding hole 212 Bearing 216 Second rotation sensor 224 Hub 226 Outer tube portion 228 Intermediate portion 230 Inner tube portion

Claims (4)

  A power distribution mechanism, a first motor generator, a second motor generator, and an output member are disposed on an input shaft connected to the engine, and the power distribution mechanism is constituted by a planetary gear train. A sun gear of the planetary gear train, A hybrid in which a carrier and a ring gear are connected to the first motor generator, the engine, and the second motor generator, respectively, and the output member is connected to the ring gear so as to rotate in the same direction directly or via a gear train. In the drive device, a through hole having a step portion is formed in an inner periphery of the motor rotor of the second motor generator, and the ring gear is detachably attached to a large diameter portion connected to the step portion of the through hole. Hybrid drive device.   The hybrid drive device according to claim 1, wherein a hub for positioning the planetary gear train in an axial direction is sandwiched between the stepped portion and the ring gear.   A support cylinder portion that protrudes into the through hole is formed in a housing that houses the second motor generator, and a small diameter portion connected to the step portion of the through hole is supported on the outer periphery of the support cylinder portion via a bearing. The hybrid drive device according to claim 1, wherein:   A bearing holding hole whose one side opens in the stepped portion is formed in the small diameter portion of the through hole, and the ring gear or the hub is brought into contact with one side of the bearing while the bearing is fitted into the bearing holding hole. The hybrid drive device according to claim 3.

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