JP2006298272A - Torque transmission device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent foreign matters such as fine metal mixed in lubricating oil from entering the motor generator side. <P>SOLUTION: This torque transmission device has a wet-type multiplate clutch 2, a motor generator 3, and oilproof structure 4. The wet-type multiplate clutch 2 to which the lubricating oil is supplied has an input-side member 15 connected with a member on an engine side, an output-side member 16 connected with a member on a transmission side, and a clutch part 17 transmitting/cutting off torque between the input-side member 15 and the output-side member 16. The motor generator 3 is disposed on an outer peripheral side of the wet-type multiplate clutch, and provided with a rotor 41 installed to the output-side member and a stator 42 opposed to the rotor 41, so that the torque can be transmitted between the motor generator and the output-side member 16. The oilproof structure 4 restricts the entry of the lubricating oil, which is supplied to the wet-type multiplate clutch 2, into the motor generator 3. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a torque transmission device, and more particularly to a torque transmission device for transmitting engine output torque to a transmission.

  In recent years, as one of the technologies for improving the fuel efficiency of automobiles, a motor generator is arranged in a torque transmission system for transmitting engine output torque to a transmission, and regeneration such as taking out kinetic energy during running is performed. Techniques have been proposed for assisting an engine by converting electricity charged in a battery into rotation of a motor generator and inputting it into a transmission.

As a configuration of such a torque transmission system, as shown in Japanese Patent Laid-Open No. 2002-87080, a wet multi-plate clutch and a motor generator are housed in a housing between the engine and the transmission to form a unit. A hybrid drive is provided. The hybrid device disclosed in this publication is arranged in series between the engine and the transmission, and the first and second clutches, which are wet multi-plate clutches, and the motor generator are housed in one housing. Is unitized. The first clutch and the second clutch are arranged adjacent to each other in the axial direction, and the input part of the first clutch and the output part of the second clutch are arranged coaxially. The common clutch casing which comprises the output part of a 1st clutch and the input part of a 2nd clutch is provided. A motor generator rotor is provided on the outer periphery of the clutch casing, and a stator of the motor generator is provided on the inner periphery of the housing 2.
JP 2002-87080 A

  In the apparatus disclosed in the above publication, the lubricating oil is scattered in the housing, and the motor generator is arranged on the outer peripheral side of the wet clutch, so that the fine metal mixed in the lubricating oil is moved to the motor generator side together with the lubricating oil. Easy to invade. When such lubricating oil enters the motor generator, fine metal mixed in the lubricating oil may adhere to the motor generator and clog the gap between the rotor and the stator. Further, when the fine metal adheres to the motor generator, the attached fine metal is magnetized, and the magnetized fine metal is more likely to adhere to the bearing. Then, the bearing is worn by the fine metal adhering to it, resulting in a life deterioration. Further, the magnetized metal easily adheres to the metal clutch plate constituting the wet multi-plate clutch, and this promotes the wear of the friction material fixed to the mating clutch plate. Furthermore, oxidation deterioration due to high-speed scattering of the lubricating oil is promoted, and the replacement frequency of the lubricating oil increases.

  An object of the present invention is to prevent foreign matters such as fine metals mixed in lubricating oil from entering the motor generator side.

  Another object of the present invention is to improve the life of the lubricating oil by suppressing high-speed scattering of the lubricating oil and suppressing oxidative deterioration of the lubricating oil.

  A torque transmission device according to a first aspect is a device for transmitting engine output torque to a transmission, and includes a wet clutch, a motor generator, and an oilproof structure. The wet clutch is supplied with at least lubricating oil, and includes an input-side member connected to an engine-side member, an output-side member connected to a transmission-side member, an input-side member, and an output-side member. And a clutch portion for transmitting or interrupting the torque. The motor generator is disposed on the outer peripheral side of the wet clutch, has a rotor mounted on the output side member and a stator disposed opposite to the rotor, and is capable of transmitting torque between the output side member. It is. The oil-proof structure is for restricting the lubricating oil supplied to the wet clutch from entering the motor generator.

  In this device, torque from the engine is transmitted to the transmission side via a wet clutch. In the wet clutch, torque is transmitted from the input side member to the output side member via the clutch portion. At this time, a motor generator including a rotor and a stator attached to the output side member performs regeneration to extract kinetic energy during traveling as electricity, or converts electricity charged in the battery into rotation of the motor generator to change speed. Execute operations that are input to the machine.

  Here, although the lubricating oil is supplied to the wet clutch, there may be a case where foreign matters such as fine metals are mixed in the lubricating oil. A motor generator is disposed on the outer peripheral side of the wet clutch, and the lubricating oil that lubricates the wet clutch is guided to the motor generator side on the outer peripheral side by centrifugal force due to rotation. However, in this apparatus, an oilproof structure is provided to restrict the lubricating oil supplied to the wet clutch from entering the motor generator side. For this reason, it is possible to prevent foreign matter such as fine metal mixed in the lubricating oil from entering the motor generator, and to prevent foreign matter from being clogged between the rotor and stator of the motor generator. Further, it is possible to suppress the fine metal from being magnetized by the motor generator, and it is possible to suppress wear of each part due to the magnetized fine metal. Furthermore, high-speed scattering of the lubricating oil can be suppressed, and the life can be improved by suppressing the oxidative deterioration of the lubricating oil.

  The torque transmission device according to a second aspect is the device according to the first aspect, wherein the output side member has a cylindrical portion that is disposed on the outer peripheral side of the clutch portion and covers the clutch portion, and the rotor is on the outer peripheral portion of the cylindrical portion. It is fixed and the stator is disposed on the outer peripheral side of the rotor. The oilproof structure is formed at the axial end portion of the cylindrical portion so as to protrude further in the axial direction than the axial end portion of the stator, and restricts the lubricating oil scattered from the clutch portion from entering the motor generator side. An annular protrusion.

  In this apparatus, an annular projecting portion is formed on a part of the output side member constituting the wet clutch, and the annular projecting portion prevents the lubricating oil from entering the motor generator side on the outer peripheral side. For this reason, an oil-proof structure can be realized with a simple configuration.

  A torque transmission device according to a third aspect is the device according to the first aspect, wherein the motor generator has a coil wound around a stator. The oil-proof structure is formed at the axial end portion of the cylindrical portion so as to protrude further in the axial direction than the axial end portion of the coil, and restricts the lubricating oil scattered from the clutch portion from entering the motor generator side. An annular protrusion.

  In this device, the lubricating oil scattered from the clutch portion is prevented from entering the coil portion of the motor generator by the annular protrusion. For this reason, it can suppress more that lubricating oil penetrate | invades into the motor generator side.

  According to a fourth aspect of the present invention, there is provided the torque transmission device according to the first aspect, wherein the output side member has a cylindrical portion disposed on the outer peripheral side of the clutch portion and covers the clutch portion, and the rotor is disposed on the outer peripheral portion of the cylindrical portion. It is fixed and the stator is disposed on the outer peripheral side of the rotor. The oilproof structure is fixed to the axial end portion of the cylindrical portion so as to cover the axial end portion of the motor generator from the side, so that the lubricating oil scattered from the clutch portion enters the motor generator side. It has an annular plate to regulate.

  In this apparatus, an annular plate is fixed to a cylindrical portion of an output side member constituting a wet clutch, and an axial end portion of the motor generator is covered from the side by the annular plate. For this reason, the lubricating oil splashed from the clutch portion hits the annular plate and can be prevented from entering the motor generator side.

  According to a fifth aspect of the present invention, the torque transmission device further includes a cylindrical housing that is disposed between the case on the engine side and the case on the transmission side and houses the wet clutch, the motor generator, and the oilproof structure. . The cylindrical housing has a first inner wall surface to which the stator is fixed, and a second inner wall surface having a larger diameter than the first inner wall surface, and the outer diameter of the annular plate faces the second inner wall surface and Extends outward beyond the outer diameter.

In this apparatus, since the annular plate is provided so as to extend further outward from the outer peripheral portion of the stator, it is possible to further prevent the lubricating oil from entering the motor generator side.
The torque transmission device according to claim 4.

  According to a sixth aspect of the present invention, there is provided the torque transmission device according to the fourth aspect, wherein the annular plate includes an inner peripheral mounting portion fixed to an end of the output side member on the engine side, and a motor extending from the inner peripheral mounting portion to the outer peripheral side. The main body part which covers the stator side surface of a generator, and the labyrinth seal part which is formed in the outer peripheral part of a main body part, and extends so that it may adjoin to the stator side from the outer periphery of a main body part. Moreover, it has further the labyrinth plate provided in the stator side surface so that it may overlap with a labyrinth seal part in the radial direction in the inner peripheral side of the labyrinth seal part of an annular plate.

  In this device, since the labyrinth seal is formed by the labyrinth seal portion and the labyrinth plate of the annular plate, it is possible to further suppress the lubricant from entering the motor generator side.

  A torque transmission device according to a seventh aspect is the device according to the sixth aspect, further comprising a cylindrical housing and a first wall. The cylindrical housing is disposed between the case on the engine side and the case on the transmission side, and houses the wet clutch, the motor generator, and the oil-proof structure inside, and the stator is fixed to the inner wall surface. The first wall is fixed to the end of the cylindrical housing on the engine side, and rotatably supports the input side member. The main body portion of the annular plate is formed in a step difference from the inner peripheral mounting portion so as to be positioned on the engine side from the inner peripheral mounting portion, and is spaced from the first wall by a predetermined distance and along the first wall. Is provided. Furthermore, the upper half portion of the first wall is provided with a protruding portion that protrudes in the axial direction so as to be positioned closer to the transmission side in the axial direction than the main body portion on the inner peripheral side from the main body portion.

  In this device, the lubricating oil splashed from the wet clutch is received by the protrusions provided on the first wall, and it is possible to more effectively suppress the lubricating oil from entering the motor generator side.

  A torque transmission device according to an eighth aspect of the present invention is the device according to any one of the first to seventh aspects, wherein the wet clutch includes a plurality of first clutch plates each provided with a friction member on each side surface, and a plurality of first clutch plates. And a plurality of second clutch plates that are alternately arranged in the axial direction and pressed against the first clutch plate.

  The torque transmission device according to a ninth aspect is the device according to the fifth aspect, further comprising a first wall, a second wall, and a seal member. The first wall is fixed to the end of the cylindrical housing on the engine side, and rotatably supports the input side member. A 2nd wall is fixed to the edge part by the side of the transmission of a cylindrical housing, and supports the output side member rotatably. The seal member is a member for making a space constituted by the cylindrical housing and the first and second walls into a sealed space.

  Here, the torque transmission device is unitized, and the unitized torque transmission device has a sealed structure. Therefore, handling becomes easy.

  According to the present invention as described above, foreign matter such as fine metal mixed in the lubricating oil can be prevented from entering the motor generator side, and acceleration of wear of other members such as bearings can be suppressed. Further, the high-speed scattering of the lubricating oil is suppressed, and the life of the lubricating oil can be improved by suppressing the oxidative deterioration of the lubricating oil.

[First Embodiment]
A torque transmission device 1 according to a first embodiment of the present invention is shown in FIG. The torque transmission device 1 is a device for transmitting engine output torque to a transmission. The wet multi-plate clutch 2, the motor generator 3, and the lubricating oil supplied to the wet multi-plate clutch 2 are motor generators. 3 and an oil-proof structure 4 for restricting the intrusion into 3. The wet multi-plate clutch 2, the motor generator 3 and the oilproof structure 4 are accommodated in a housing 5. A damper device 7 having a torque limiter function is provided between the torque transmission device 1 and the crankshaft 6 of the engine.

  The housing 5 includes a cylindrical portion 5a, a first wall 5b fixed to an end surface of the cylindrical portion 5a on the engine side, and a second wall 5c constituting a transmission side wall of the cylindrical portion 5a. ing. In addition, a damper housing 8 is fixed to the engine-side end surface of the cylindrical portion 5 a, and the damper device 7 is accommodated inside the damper housing 8. Further, a transmission-side housing 9 is fixed to the transmission-side end face of the cylindrical portion 5 a, and the second wall 5 c is fixed to the transmission-side housing 9. Here, the cylindrical portion 5a has a first inner wall surface 501a and a second inner wall surface 501b formed at the end of the cylindrical portion 5a on the engine side and having a larger inner diameter than the first inner wall surface 501a. . The outer peripheral surface of the first wall 5 b is in contact with the second inner wall surface 501 b and the inner peripheral surface of the damper housing 8.

<Damper device>
The damper device 7 includes a damper 10 having a torque limiting portion on the outer peripheral portion, and a flexible plate 11 that connects the crankshaft 6 and the damper 10. The damper 10 is configured by pressing a friction disk portion of a known damper disk assembly in advance with a predetermined pressing force with a disc spring or a ring-shaped plate, and a detailed structure thereof is omitted here. The flexible plate 11 has an outer peripheral portion fixed to the torque limiting portion of the damper 10 and an inner peripheral portion fixed to the crankshaft 6. The flexible plate 11 is formed of a relatively thin disk-shaped metal plate so as to have high rigidity in the circumferential direction and low rigidity in the axial direction (bending direction).

<Wet multi-plate clutch>
As shown in FIG. 2 which is an enlarged partial view of FIGS. 1 and 1, the wet multi-plate clutch 2 includes an input side member 15, an output side member 16, and an input side member 15 and an output side member 16. And a clutch portion 17 for transmitting or interrupting torque.

  The input side member 15 includes an input portion 15a that is splined to the damper device 7, a support portion 15b that extends from one axial end of the input portion 15a to the axial transmission side and radially outward, and a support portion. And a clutch engaging portion 15c extending radially outward at one axial end of 15b. The support portion 15b is rotatably supported by the first wall 5b via a bearing 20. A seal member 21 is disposed between the outer peripheral surface of the support portion 15b and the hole of the first wall 5b. A spline shaft is formed on the outer periphery of the clutch engaging portion 15c.

  The output side member 16 includes a support portion 16a formed in a substantially cylindrical shape extending in the axial direction on the inner peripheral side, and a clutch engaging portion 16b formed in a cylindrical shape on the outer peripheral side and having a spline hole formed in the inner peripheral surface. have. The clutch engaging portion 16 b is provided so as to cover the outer periphery of the clutch portion 17. A flange portion extending radially outward is formed on the support portion 16a, and a flange portion extending radially inward is formed on the clutch engaging portion 16b. Both the flange portions are coupled by a rivet. Yes. A spline hole is formed in the inner peripheral surface of the end portion on the engine side of the support portion 16a, and the spline hole is spline-coupled to the transmission side shaft. Further, the end of the support portion 16a on the engine side is rotatably supported by the input side member 15 by the bearing 22, and the end on the transmission side is formed in the inner peripheral portion of the second wall 5c by the bearing 23. The extending portion 5d is rotatably supported. Further, a seal member 24 is provided between the end of the support portion 16a on the transmission side and the second wall 5c.

  The clutch portion 17 includes a plurality of ring-shaped first clutch plates having friction materials fixed on both surfaces, and a plurality of ring-shaped second clutch plates to which friction materials are not fixed. Alternatingly arranged in the axial direction. The first clutch plate has a spline hole formed in the inner periphery thereof, and the spline hole is engaged with the clutch engaging portion 15 c of the input side member 15. The second clutch plate has a spline shaft formed on the outer peripheral portion thereof, and this spline shaft is engaged with the clutch engaging portion 16 b of the output side member 16.

  Further, a piston 30 for pressing the first clutch plate and the second clutch plate is provided inside the output side member 16. The piston 30 is moved in the axial direction by hydraulic pressure supplied through an oil passage formed in the support portion 16a of the output side member 16 and the like. A hydraulic canceller 31 is provided in order to prevent the piston 30 from moving due to the hydraulic pressure due to the centrifugal force. The hydraulic canceller 31 is disposed between the piston 30 and the clutch portion 17 so as to face the piston 30, and is disposed between the support plate 31a and the piston 30 to clutch the piston 30. And a spring 31b biased to the side away from the portion 17.

<Motor generator>
The motor generator 3 includes a rotor 41 fixed to the outer peripheral surface of the clutch engaging portion 16 b in the output side member 16, and a stator 42 disposed to face the rotor 41. The rotor 41 has a rotor magnet made of a permanent magnet on the outer peripheral side. The stator 42 is fixed to the first inner wall surface 501a of the cylindrical portion 5a in the housing 5, and a coil 43 is wound around it and connected to a battery (not shown) to exchange electricity.

<Oilproof structure>
The oilproof structure 4 is formed at the end of the output side member 16 on the engine side of the clutch engaging portion 16b. That is, an annular protrusion 45 is formed at the end of the clutch engaging portion 16b on the engine side in the axial direction so as to protrude further toward the engine than the end of the stator 42 on the engine side. More specifically, the annular protrusion 45 is formed so as to protrude further to the engine side by a distance α (see FIG. 1) than the engine side end of the coil 43 wound around the stator 42. With this annular protrusion 45, it is possible to prevent the lubricating oil scattered from the clutch portion 17 from entering the motor generator 3 side.

  As shown in FIG. 3, a drain pan 46 for storing lubricating oil that has lubricated the clutch portion 17 and the like is provided at the bottom of the cylindrical portion 5 a of the housing 5. A passage 5e communicating with the drain pan 46 is formed at the bottom of the cylindrical portion 5a, and the lubricating oil inside the housing 5 is collected by the drain pan 46 through the passage 5e.

<Operation>
(1) Motor start At the time of start, electric power is supplied to the motor generator 3 with the wet multi-plate clutch 2 turned off. Then, the motor generator 3 is driven, this driving force is transmitted from the output side member 16 of the wet multi-plate clutch 3 to the transmission side shaft, and the vehicle is started only by the motor generator 3. Then, when the rotation of the rotor 41 of the motor generator 3 corresponds to the idling rotation of the engine, the wet multi-plate clutch 2 is turned on (contacted). This starts the engine.

(2) Low-load acceleration traveling When accelerating, the driving force of the motor generator 3 is decreased while increasing the driving force of the engine, and finally the driving force of the motor generator 3 is set to zero and acceleration is performed only by the engine driving force. To do.

(3) Slow traveling by only the motor generator With the wet multi-plate clutch 2 turned off, the fuel supply to the engine is stopped and only the motor generator 3 is driven. In this case, the driving force of the motor generator 3 is transmitted to the output side member 16 and the transmission side shaft of the wet multi-plate clutch 2, and the vehicle travels. On the other hand, the driving force of the motor generator 3 is not transmitted to the engine side because the wet multi-plate clutch 2 is off. Here, the engine is not driven by the motor generator 3, the friction of the engine is cut off, and a driving loss can be prevented. Further, the speed can be finely adjusted by the rotation control of the motor generator 3, and there is no need to perform complicated half-clutch control.

(4) Traveling only with the engine The wet multi-plate clutch 2 is turned on to drive the engine, while the motor generator 3 is not supplied with electric power. Then, the torque from the engine is input to the input side member 15 of the wet multi-plate clutch 3 via the damper device 7, and further transmitted to the transmission shaft via the clutch portion 17 and the output side member 16, so that the vehicle Will be traveling alone.

(5) High-load running The wet multi-plate clutch 2 is turned on, and both the engine and the motor generator 3 are driven in this state. In this case, torque from the engine is input to the input side member 15 of the wet multi-plate clutch 3 via the damper device 7, and further transmitted to the transmission shaft through the clutch portion 17 and the output side member 16, The driving force of the motor generator 3 is transmitted from the output side member 16 to the transmission shaft. As a result, both driving forces are transmitted to the driving wheels, and high-load traveling is possible.

(6) Reduced speed / light braking The wet multi-plate clutch 2 is turned off. In this case, the driving force from the transmission side is transmitted to the motor generator 3 via the transmission shaft and the output side member 16, and the motor generator 3 is reversely driven. Thereby, the motor generator 3 generates electric power, the deceleration energy is regenerated and the battery is charged, and regenerative braking is realized. At this time, since the wet multi-plate clutch 2 is off, no driving force is transmitted to the engine side, no friction loss due to reverse driving of the engine occurs, and a reduction in the amount of power generated by the motor generator 3 is prevented. .

(7) Rapid deceleration / rapid braking The wet multi-plate clutch 2 is turned on. In this case, both the motor generator 3 and the engine are reversely driven by the driving force from the transmission side. As a result, engine friction can be used in addition to regenerative braking, and high deceleration and braking power can be obtained.

<Oilproof>
During the operation as described above, the lubricating oil is supplied to the clutch portion 17 of the wet multi-plate clutch 2. This lubricating oil tends to scatter to the outer peripheral side of the wet multi-plate clutch 2 by centrifugal force. Here, since the annular protrusion 45 is formed on the output side member 16 of the wet multi-plate clutch 2, the outward movement of the lubricating oil scattered from the clutch part 17 is restricted by the annular protrusion 45. . Accordingly, it is possible to suppress the intrusion of the lubricating oil into the motor generator 3 disposed on the outer periphery of the annular protrusion 45. In particular, since the annular protrusion 45 protrudes further toward the engine side in the axial direction than the engine-side axial end of the coil 43 of the stator 42, the lubricating oil is further scattered to the outer peripheral side beyond the annular protrusion 45. Even in this case, the intrusion into the motor generator 3 is reduced.

  The scattered lubricating oil falls downward due to the gravity, and is collected in the drain pan 46 through the passage 5e of the cylindrical portion 5a in the housing 5 as shown by the dotted line in FIG.

[Second Embodiment]
A torque transmission device 1 'according to a second embodiment of the present invention is shown in FIG. Since this torque transmission device 1 ′ is exactly the same as the configuration of the torque transmission device 1 of the first embodiment except for the oil-proof structure, only the oil-proof structure will be described below, and the description of the other configurations will be omitted. Omitted.

<Oilproof structure>
The oilproof structure 50 is provided at the engine side end of the output side member 16 in the wet multi-plate clutch 2. More specifically, the oilproof structure 50 is provided on the end surface on the engine side of the clutch engaging portion 16 b of the output side member 16, and has an annular plate 51. The annular plate 51 includes an inner peripheral attachment portion 51a fixed to the engine-side end surface of the clutch engagement portion 16b by a bolt 52, and a main body portion 51b that is formed stepwise with the inner peripheral attachment portion 51a and extends radially outward. have. The main body 51b extends to the vicinity of the inner peripheral surface of the cylindrical portion 5a along the first wall 5b and with a predetermined gap between the main body 51b and the first wall 5b. More specifically, the outer periphery of the main body 51b is opposed to the second inner wall surface 501b of the cylindrical portion 5a and extends outward beyond the outer periphery of the stator 42 (overlap by β in FIG. 4). is doing). Accordingly, the entire axial end of the motor generator 3 on the engine side is covered from the side by the main body 51b.

  In such a configuration, the lubricating oil scattered particularly from the clutch portion 17 of the wet multi-plate clutch 2 is restricted by the annular plate 51, and the scattered lubricating oil can be restricted from entering the motor generator 3 side.

[Third Embodiment]
A torque transmission device 1 '' according to a third embodiment of the present invention is shown in FIGS. Since this torque transmission device 1 '' is exactly the same as the configuration of the torque transmission device of the first and second embodiments except for the oilproof structure, only the oilproof structure will be described below, and the other configurations will be described. Description of is omitted.

<Oilproof structure>
The oilproof structure 60 is provided at the engine side end of the output side member 16 in the wet multi-plate clutch 2. More specifically, the oilproof structure 60 is provided on the engine-side end surface of the clutch engagement portion 16 b of the output side member 16 and has an annular plate 61. The annular plate 61 is formed in an inner peripheral mounting portion 61a fixed to the engine side end face of the clutch engaging portion 16b by a bolt 52 and in a stepwise manner so as to be positioned on the engine side with respect to the inner peripheral mounting portion 51a. It has a main body portion 61b extending outward and a labyrinth seal portion 61c formed on the outer peripheral portion of the main body portion 61b and extending from the outer periphery of the main body portion 61b so as to approach the stator 42 side. The main body 61b is formed to extend along the first wall 5b with a predetermined distance from the teeth and the first wall 5b.

  The oilproof structure 60 has a labyrinth plate 63 fixed to the stator 42 by bolts 62 for fixing the stator 42 to the cylindrical portion 5 a of the housing 5. The labyrinth plate 63 includes an attachment portion 63a attached to the stator 42, a cylindrical ring portion 63b provided so as to cover the outer periphery of the coil 43 of the stator 42 from the outer periphery, and an end portion on the engine side of the ring portion 63b. And a flange portion 63c extending to the outer peripheral side. The ring portion 63b and the flange portion 63c are provided on the inner peripheral side of the labyrinth seal portion 61c of the annular plate 61, and are arranged so as to overlap with the labyrinth seal portion 61c in the radial direction. The flange portion 63 c is parallel to the main body portion 61 b of the annular plate 61.

  In such an oilproof structure 60, a labyrinth seal is configured by the labyrinth seal portion 61 c of the annular plate 61 and the labyrinth plate 63, and the labyrinth seal makes it difficult for the lubricating oil to enter the motor generator 3 side.

  Moreover, in this embodiment, the protrusion part 64 which protrudes in the axial direction wet multi-plate clutch 2 side is formed in the 1st wall 5b. The protrusion 64 is formed only on the upper half of the first wall 5b, faces the inner peripheral attachment portion 61a of the annular plate 61, and protrudes further toward the wet multi-plate clutch 2 side than the main body portion 61b.

  In such a third embodiment, the lubricating oil scattered from the wet multi-plate clutch 2 is scattered along the passage between the first wall 5b and the annular plate 61, but the lubricating oil scattered upward is the first. It is received by the protrusion 64 of the wall 5b and falls downward. Further, the lubricating oil splashed over the protrusion 64 is prevented from entering the motor generator 3 side by the labyrinth seal formed by the labyrinth seal portion 61 c of the annular plate 61 and the labyrinth plate 63. Then, the lubricating oil is finally collected in the drain pan 46 through the passage 5e of the cylindrical portion 5a in the housing 5 as shown by the dotted line in FIG.

The cross-sectional block diagram of the torque transmission apparatus by 1st Embodiment of this invention. FIG. 3 is an enlarged partial view of the torque transmission device. The bottom part figure of the said torque transmission device. The cross-sectional block diagram of the torque transmission apparatus by 2nd Embodiment of this invention. The cross-sectional block diagram of the torque transmission apparatus by 3rd Embodiment of this invention. The bottom part fragmentary view of the torque transmission device by 3rd Embodiment of this invention.

Explanation of symbols

1, 1 ′, 1 ″ Torque transmission device 2 Wet multi-plate clutch 3 Motor generator 4, 50, 60 Oilproof structure 5 Housing 5a Cylindrical portion 5b First wall 5c Second wall 15 Input side member 16 Output side member 17 Clutch portions 21 and 24 Seal member 41 Rotor 42 Stator 43 Coil 45 Annular projection 51 Annular plate 501a First inner wall surface 501b Second inner wall surface

Claims (9)

A torque transmission device for transmitting engine output torque to a transmission,
Torque is applied between the input side member connected to the engine side member, the output side member connected to the transmission side member, and the input side member and the output side member. A wet clutch having a clutch portion for transmission or disconnection;
A motor disposed on the outer peripheral side of the wet clutch, having a rotor mounted on the output side member and a stator disposed opposite to the rotor, and capable of transmitting torque to and from the output side member Generator,
An oilproof structure for restricting the lubricating oil supplied to the wet clutch from entering the motor generator;
Torque transmission device with The output side member has a cylindrical portion that is disposed on the outer peripheral side of the clutch portion and covers the clutch portion,
The rotor is fixed to the outer peripheral portion of the cylindrical portion,
The stator is disposed on the outer peripheral side of the rotor,
The oil-proof structure is formed at the axial end portion of the cylindrical portion so as to protrude further in the axial direction than the axial end portion of the stator, and the lubricating oil scattered from the clutch portion enters the motor generator side. Having an annular protrusion that regulates the
The torque transmission device according to claim 1. The motor generator has a coil wound around the stator,
The oil-proof structure is formed at the axial end portion of the cylindrical portion so as to protrude further in the axial direction than the axial end portion of the coil, and lubricating oil scattered from the clutch portion enters the motor generator side. Having an annular protrusion that regulates the
The torque transmission device according to claim 1. The output side member has a cylindrical portion that is disposed on the outer peripheral side of the clutch portion and covers the clutch portion,
The rotor is fixed to the outer peripheral portion of the cylindrical portion,
The stator is disposed on the outer peripheral side of the rotor,
The oil-proof structure is fixed to the axial end of the cylindrical portion so as to cover the axial end of the motor generator from the side, and the lubricating oil scattered from the clutch portion enters the motor generator side. Having an annular plate that regulates,
The torque transmission device according to claim 1. A cylindrical housing that is disposed between the case on the engine side and the case on the transmission side, and houses the wet clutch, the motor generator, and the oil-proof structure therein;
The cylindrical housing has a first inner wall surface to which the stator is fixed, and a second inner wall surface having a larger diameter than the first inner wall surface,
The outer diameter of the annular plate faces the second inner wall surface and extends outward beyond the outer diameter of the stator.
The torque transmission device according to claim 4. The annular plate includes an inner peripheral mounting portion fixed to an end portion on the engine side of the output side member, a main body portion extending from the inner peripheral mounting portion to an outer peripheral side and covering a stator side surface of the motor generator, and the main body portion. A labyrinth seal portion that is formed on the outer periphery of the main body and extends so as to approach the stator side from the outer periphery of the main body,
A labyrinth plate provided on the stator side surface so as to overlap the labyrinth seal portion in the radial direction on the inner peripheral side of the labyrinth seal portion of the annular plate;
The torque transmission device according to claim 4. A cylindrical housing that is disposed between the case on the engine side and the case on the transmission side, houses the wet clutch, motor generator, and oil-proof structure therein, and has the stator fixed to the inner wall surface;
A first wall fixed to the end of the cylindrical housing on the engine side and rotatably supporting the input side member;
The main body of the annular plate is formed in a step different from the inner peripheral mounting portion so as to be positioned closer to the engine than the inner peripheral mounting portion, and is spaced apart from the first wall by a predetermined distance. Along the walls,
The upper half of the first wall is provided with a protrusion that protrudes in the axial direction so as to be positioned closer to the transmission in the axial direction than the main body on the inner peripheral side of the main body.
The torque transmission device according to claim 6.   The wet clutch includes a plurality of first clutch plates each provided with a friction member on both side surfaces, and a plurality of first clutch plates arranged alternately with the plurality of first clutch plates in an axial direction and pressed against the first clutch plates. The torque transmission device according to any one of claims 1 to 7, wherein the torque transmission device is a wet multi-plate clutch having two clutch plates. A first wall fixed to the end of the cylindrical housing on the engine side and rotatably supporting the input side member;
A second wall fixed to an end portion of the cylindrical housing on the transmission side and rotatably supporting the output side member;
A sealing member for making a space constituted by the cylindrical housing and the first and second walls into a sealed space;
The torque transmission device according to claim 5, further comprising:

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