JP2022128916A - Vehicular driving device and manufacturing method of the same - Google Patents

Abstract

To provide a technique that secures a large internal space of a joint housing in a fluid joint with a dimension of a vehicular driving device reduced in an axial direction.SOLUTION: In a vehicular driving device, a first support member 71 supporting a rotor 12 from a radial inner side R1 and a second support member 72 supporting the first support member 71 from the radial inner side R1 are engaged so as not to be rotatable relative to each other and configured to be separable in an axial direction L. The first support member 71 is fixed to a joint housing 6 in an inseparable manner. An engagement device 3 is located at the radial inner side R1 relative to the first support member 71 and disposed between the joint housing 6 and the second support member 72 in the axial direction L. The vehicular driving device is provided with a restriction member which restricts relative movement of the second support member 72 to the first axial side L1 relative to the first support member 71. A second cover member 92 joined to a first cover member 91 in a separable manner and the second support member 72 are integrated through a support bearing B1 so as to be rotatable relative to each other.SELECTED DRAWING: Figure 2

Description

The present invention comprises an input member drivingly connected to an internal combustion engine, a rotating electric machine having a rotor, a rotor support member supporting the rotor, an engaging device for connecting and disconnecting power transmission between the input member and the rotor, TECHNICAL FIELD The present invention relates to a vehicle drive device including a fluid coupling and a case that accommodates them, and a method of manufacturing the same.

An example of such technology is disclosed in Patent Document 1 below. In the following descriptions of "Background Art" and "Problems to be Solved by the Invention," reference numerals in Patent Document 1 are quoted in parentheses.

In the vehicle drive system of Patent Document 1, a fluid coupling (TC) includes a pump impeller (41) and a turbine runner (51) that rotate relatively to each other, and a lockup engagement device ( C2) and a joint housing (42) containing them. The joint housing (42) and the rotor (Ro) are connected so as to rotate integrally.

JP 2012-96677 A

In the vehicle drive system described above, the joint housing (42) and the rotor support member (22) that supports the rotor (Ro) support the friction member (33) of the engagement device (C1) from the outside in the radial direction. It is connected via a support member (32) that connects. The support member (32) is axially fixed to the joint housing (42) using bolts (92). In such a configuration, it is necessary to secure a space for arranging the bolt (92), so the vehicle drive device tends to be large in the axial direction.

In the vehicle drive device described above, the space radially inwardly adjacent to the coil end portion (Ce) of the stator (St) and on one side (A2) of the rotor (Ro) in the axial direction. By arranging the bolts (92) in the adjacent space, an increase in axial size of the vehicle drive device is suppressed. However, there is a problem that it is difficult to secure a large space inside the joint housing (42) due to securing the space for arranging the bolt (92). In such a case, it has been difficult to secure a large accommodation space for the lockup engagement device (C2) inside the joint housing (42), making it difficult to increase the transmission torque capacity of the lockup engagement device (C2).

Therefore, it is desired to realize a technology that can easily secure a large space inside the joint housing of the fluid coupling while keeping the axial dimension of the vehicle drive device small.

In view of the above, the characteristic configuration of the vehicle drive system is as follows.
an input member drivingly connected to an internal combustion engine;
a rotating electric machine having a rotor;
a rotor support member that supports the rotor;
an engagement device for connecting and disconnecting power transmission between the input member and the rotor;
a fluid coupling including a coupling body and a coupling housing that accommodates the coupling body;
a case that houses the rotating electric machine, the rotor support member, the engagement device, and the fluid coupling,
A direction along the axis of rotation of the rotor is defined as an axial direction, one side of the axial direction is defined as a first side in the axial direction, and the other side in the axial direction is defined as a second side in the axial direction,
The rotating electric machine is arranged on the first side in the axial direction with respect to the fluid coupling,
The rotor support member includes a first support member disposed radially inside the rotor and coupled to rotate integrally with the rotor; a second support member arranged inside and supporting the first support member from the inside in the radial direction;
The first support member is fixed inseparably to the joint housing and arranged to protrude from the joint housing toward the first side in the axial direction,
the engagement device is disposed radially inward of the first support member and between the joint housing and the second support member in the axial direction;
The first support member and the second support member are engaged with each other so as not to rotate relative to each other, and are configured to be separable in the axial direction,
a regulating member that regulates relative movement of the second support member to the first side in the axial direction with respect to the first support member;
The case includes a first cover member that covers the first axial side of the rotating electric machine, and a second cover member that is joined to the first cover member and rotatably supports the second support member. ,
The second cover member and the second support member are integrated with each other through a support bearing so as to be relatively rotatable,
The first cover member and the second cover member are joined in a mutually separable manner.

According to this feature, the first support member of the rotor support member is inseparably fixed to the joint housing. Therefore, it is not necessary to provide fastening members such as bolts to connect the rotor support member and the joint housing. Therefore, it is easy to secure a large space inside the joint housing while keeping the axial dimension of the vehicle drive device small. For example, when the lockup engagement device is arranged in the portion on the first side in the axial direction inside the joint housing, it is possible to dispose the lockup engagement device while keeping the axial dimension of the vehicle drive device small. It is easy to secure a large space.
By the way, when the first support member is inseparably fixed to the joint housing as described above, the axial direction of the joint housing and the second support member that supports the first support member from the inside in the radial direction. It becomes difficult to place the engagement device between However, according to this characteristic configuration, since the first support member and the second support member can be separated in the axial direction, the engaging device is arranged between the second support member and the joint housing in the axial direction. can do.
In addition, when the first support member and the second support member are configured to be separable in the axial direction, the second support member is restricted from moving relative to the first support member in the first axial direction. It is necessary to provide a member. When the first cover member that covers the first side in the axial direction of the rotating electric machine and the second cover member that rotatably supports the second support member are integrally formed, such a restricting member can be assembled. difficult. However, according to this characterizing configuration, the first cover member and the second cover member are separable from each other. Furthermore, the second cover member and the second support member are integrated so as to be relatively rotatable via the support bearing. Therefore, in the manufacturing process of the vehicle drive device, the module in which the second cover member, the second support member, and the support bearing are integrated is arranged so that the first support member and the second support member are not relatively rotatable. Second, after assembling the modules including the first support members, the first cover member can be joined to the second cover member after the regulating member is assembled to those modules. Therefore, it is possible to easily assemble the restricting member.

1 is a schematic diagram showing a schematic configuration of a vehicle drive system according to an embodiment; 1 is a partial cross-sectional view of a vehicle drive system according to an embodiment; Partially enlarged cross-sectional view of the vehicle drive system according to the embodiment Flowchart showing a method for manufacturing a vehicle drive system according to an embodiment The figure which shows the joint module assembly process which concerns on embodiment. The figure which shows the 1st assembly process which concerns on embodiment FIG. 5 is a diagram showing a second assembly process and a third assembly process according to the embodiment; The figure which shows the sensor rotor assembly process which concerns on embodiment. The figure which shows the 4th assembly|attachment process which concerns on embodiment

A vehicle drive system 100 according to an embodiment will be described below with reference to the drawings. A vehicle drive system 100 according to the present embodiment is configured to be mounted on an FR (Front Engine Rear Drive) vehicle.

As shown in FIG. 1, the vehicle drive system 100 is a system for driving a vehicle (hybrid vehicle) that uses one or both of an internal combustion engine EG and a rotating electric machine 1 as a driving force source for wheels W. As shown in FIG. That is, the vehicle drive device 100 is configured as a drive device for a so-called one-motor parallel hybrid vehicle.

In the following description, "axial direction L", "radial direction R", and "circumferential direction" are defined with reference to the rotation axis of the rotating electric machine 1, unless otherwise specified. One side in the axial direction L is referred to as "first axial side L1", and the other side in the axial direction L is referred to as "second axial side L2". In the present embodiment, in the axial direction L, the side on which the internal combustion engine EG is arranged with respect to the rotary electric machine 1 is defined as the first axial side L1, and the opposite side is defined as the second axial side L2. In addition, in the radial direction R, the rotation axis side of the rotary electric machine 1 is defined as "radial inner side R1", and the opposite side is defined as "radial outer side R2". The direction of each member represents the direction when they are assembled to the vehicle drive device 100 . Also, the terms relating to the direction, position, etc. of each member are concepts that include the state of having a difference due to an allowable manufacturing error.

The rotating electric machine 1 functions as a driving force source for the wheels W. As shown in FIG. The rotating electrical machine 1 includes a stator 11 and a rotor 12 . The rotary electric machine 1 has a function as a motor (electric motor) that receives power supply and generates power, and a function as a generator (generator) that receives power supply and generates power. Therefore, the rotating electric machine 1 is electrically connected to a power storage device (battery, capacitor, or the like). The rotary electric machine 1 is powered by being supplied with electric power from the power storage device, or supplies electric power generated by the torque of the internal combustion engine EG or the inertial force of the vehicle to the power storage device and stores it.

The internal combustion engine EG functions as a driving force source for the wheels W, similar to the rotating electric machine 1 . The internal combustion engine EG is a prime mover (gasoline engine, diesel engine, etc.) that is driven by combustion of fuel to take out power.

As shown in FIG. 1 , the vehicle drive device 100 includes an input member 2 , an engagement device 3 , a fluid coupling 4 and a case 9 in addition to the rotating electric machine 1 described above. In this embodiment, the vehicle drive system 100 further includes a transmission TM.

The input member 2 is drivingly connected to the internal combustion engine EG. The input member 2 is preferably drivingly connected to the output shaft (crankshaft, etc.) of the internal combustion engine EG via a damper device (not shown) that dampens fluctuations in the torque to be transmitted.

Here, in the present application, "driving connection" refers to a state in which two rotating elements are connected so as to be able to transmit a driving force, and the two rotating elements are connected so as to rotate integrally. It includes a state in which two rotating elements are connected so as to be able to transmit driving force via one or more transmission members. Such transmission members include various members that transmit rotation at the same speed or at different speeds, such as shafts, gear mechanisms, belts, and chains. The transmission member may include an engagement device for selectively transmitting rotation and driving force, such as a friction engagement device and a mesh type engagement device.

The engagement device 3 is arranged in a power transmission path between the input member 2 and the rotor 12 . The engagement device 3 is a device that connects and disconnects power transmission between the input member 2 and the rotor 12 .

The transmission TM is a device that changes the speed of rotation transmitted from the rotary electric machine 1 side. In this embodiment, the transmission TM changes the speed of the rotation of the speed change input shaft Ta as an input element of the transmission TM and transmits it to the output shaft O. As shown in FIG. The output shaft O is drivingly connected to a pair of wheels W via a differential gear device DF. Therefore, the rotation transmitted to the output shaft O is distributed to the pair of wheels W by the differential gear device DF. As the transmission TM, for example, various known types such as a stepped automatic transmission configured to be able to switch between a plurality of gear stages and a continuously variable automatic transmission configured to be able to change the gear ratio steplessly. An automatic transmission can be used.

The fluid coupling 4 is arranged in a power transmission path between the rotary electric machine 1 and the transmission TM. In this embodiment, the fluid coupling 4 includes a joint body 5 and a joint housing 6 that accommodates the joint body 5 .

In the present embodiment, the joint main body 5 includes a joint input side member 51 connected to rotate integrally with the joint housing 6, a joint output side member 52 paired with the joint input side member 51, and a joint input side member 52. A lockup engaging device 53 that selectively engages the side member 51 and the joint output side member 52 is provided.

In this embodiment, the fluid coupling 4 includes a joint input side member 51 as a pump impeller, a joint output side member 52 as a turbine runner, and a straightening member 57 as a stator disposed between them. It is a torque converter. The fluid coupling 4 transmits power between a joint input side member 51 and a joint output side member 52 which are arranged so as to face each other in the axial direction L, via a fluid such as oil. In the illustrated example, the joint input side member 51 is arranged to face the joint output side member 52 on the axial second side L2.

The joint input side member 51 is connected to the joint housing 6 so as to rotate integrally therewith. The joint output side member 52 is connected so as to rotate integrally with the transmission input shaft Ta of the transmission TM.

The lockup engagement device 53 is configured to selectively bring the joint input side member 51 and the joint output side member 52 into a direct engagement state. That is, the lockup engagement device 53 connects the joint housing 6 and the speed change input shaft Ta of the transmission TM to the direct engagement state and between the joint input side member 51 and the joint output side member 52 via fluid. It is configured to be switchable to one of the power transmission states. The "directly engaged state" is an engaged state in which there is no rotational speed difference between the two rotating elements (here, the joint input side member 51 and the joint output side member 52).

In this embodiment, the joint housing 6 is connected to rotate integrally with the rotor 12 of the rotary electric machine 1 .

As shown in FIG. 2 , the case 9 accommodates the rotary electric machine 1 , the engagement device 3 , and the fluid coupling 4 . In this embodiment, the case 9 accommodates the input member 2 such that the end portion of the input member 2 on the first axial side L1 is exposed to the outside of the case 9 . Moreover, in this embodiment, the case 9 also accommodates the transmission TM.

The rotary electric machine 1 is arranged on the axial first side L<b>1 with respect to the fluid coupling 4 . A stator 11 of the rotating electrical machine 1 has a stator core 111 fixed to a non-rotating member (case 9 in this case). The rotor 12 of the rotary electric machine 1 has a rotor core 121 that is rotatably supported relative to the stator core 111 .

In this embodiment, the rotating electrical machine 1 is an inner rotor type rotating electrical machine. Therefore, rotor core 121 is arranged radially inward R<b>1 of stator core 111 .

Further, in the present embodiment, the rotating electrical machine 1 is a rotating field type rotating electrical machine. Therefore, the stator coil is wound around the stator core 111 so that coil end portions 112 projecting from the stator core 111 to both sides in the axial direction L (first axial side L1 and second axial side L2) are formed. It is A permanent magnet 122 is provided in the rotor core 121 .

Further, in the present embodiment, the connection member 14 is attached to the coil end portion 112 on the axial second side L2. The connection member 14 is a member that electrically connects the rotating electrical machine 1 and an inverter device (not shown) for controlling the rotating electrical machine 1 .

The vehicle drive device 100 includes a rotor support member 7 that supports the rotor 12 of the rotating electrical machine 1 . The rotor support member 7 is housed in the case 9 . The rotor support member 7 has a first support member 71 and a second support member 72 .

The first support member 71 is arranged radially inward R<b>1 with respect to the rotor 12 . The first support member 71 is connected to rotate integrally with the rotor 12 . In this embodiment, the first support member 71 is formed in a tubular shape having an axial center along the axial direction L. As shown in FIG. The first support member 71 supports the rotor 12 from the radially inner side R1. In this example, the rotor 12 is supported from both sides in the axial direction L by the pair of holders 13 while the outer peripheral surface of the first support member 71 and the inner peripheral surface of the rotor 12 are in contact with each other.

The first support member 71 is arranged to protrude from the joint housing 6 toward the first side L1 in the axial direction. The first support member 71 is non-separably fixed to the joint housing 6 . Here, "inseparable" refers to a state in which multiple elements are integrally joined by welding, a state in which multiple elements are integrally molded from the same material, etc. Refers to a state in which it is difficult to separate, excluding the state in which it is assembled and integrated such as bolting, spline fitting, press fitting, etc. In this example, the end of the first support member 71 on the axial second side L2 is fixed to the joint housing 6 by welding.

The second support member 72 is arranged radially inward R<b>1 with respect to the first support member 71 . The second support member 72 supports the first support member 71 from the radial inner side R1. In this embodiment, the second support member 72 is formed to extend from the first support member 71 toward the radially inner side R1.

The first support member 71 and the second support member 72 are engaged with each other so as not to rotate relative to each other. The first support member 71 and the second support member 72 are configured to be separable in the axial direction L. As shown in FIG. That is, the first support member 71 and the second support member 72 can be separated by relatively moving in the axial direction L with respect to each other.

As shown in FIG. 3 , in this embodiment, the second support member 72 is engaged with the inner peripheral surface 71 a of the first support member 71 . In this example, the inner peripheral surface 71a of the first support member 71 is formed with a plurality of first spline grooves 71b. A plurality of spline grooves that engage with the plurality of first spline grooves 71b are formed at the radially outer R2 end portion of the second support member 72 . The plurality of first spline grooves 71b are formed such that the inner peripheral surface 71a of the first support member 71 is recessed radially outward R2. Although not shown, the plurality of first spline grooves 71b are distributed at equal intervals over the entire circumferential direction of the inner peripheral surface 71a of the first support member 71 . In the illustrated example, the plurality of first spline grooves 71b are formed continuously from the end portion on the first side L1 in the axial direction to the central portion in the axial direction L on the inner peripheral surface 71a of the first support member 71. ing. Therefore, in the illustrated example, the second support member 72 can be separated from the first support member 71 by moving relative to the first support member 71 toward the first side L1 in the axial direction.

In the present embodiment, the vehicle drive device 100 further includes a first restriction mechanism Ra that restricts relative movement of the second support member 72 with respect to the first support member 71 toward the second side L2 in the axial direction. In this example, the inner peripheral surface 71a of the first support member 71 is formed with a first restricting surface 71c facing the first side L1 in the axial direction. The first restricting surface 71c is formed such that the engaging portion of the second support member 72 with the first support member 71 abuts from the axial direction first side L1. Here, the first restricting surface 71c is formed as a terminal surface on the axial second side L2 of the plurality of first spline grooves 71b. In this example, the first regulation surface 71c functions as the first regulation mechanism Ra.

The vehicle drive device 100 includes a restricting member 10 that restricts relative movement of the second supporting member 72 to the first axial side L1 with respect to the first supporting member 71 .

In this embodiment, the regulating member 10 is engaged with the inner peripheral surface 71a of the first support member 71 . The restricting member 10 is arranged so as to abut against the second supporting member 72 from the first side L1 in the axial direction. In this example, the regulating member 10 is a snap ring formed in an annular shape along the circumferential direction of the inner peripheral surface 71 a of the first support member 71 . An engaging groove extending along the circumferential direction is formed in the mounting location of the regulating member 10 on the inner peripheral surface 71a of the first support member 71, and the regulating member 10 as a snap ring is formed in the engaging groove. By being fitted, the restricting member 10 is engaged with the inner peripheral surface 71 a of the first support member 71 .

As shown in FIG. 2, the case 9 includes a first cover member 91 and a second cover member 92 that are connectable to each other. In this embodiment, the case 9 further includes a peripheral wall portion 93 that covers the rotating electric machine 1 and the radial outer side R2 of the fluid coupling 4, and a side wall portion 94 that covers the axial second side L2 of the fluid coupling 4. .

The first cover member 91 is arranged to cover the first axial side L<b>1 of the rotary electric machine 1 . In this embodiment, the first cover member 91 is formed to extend along the radial direction R. As shown in FIG. Then, in a state in which the end of the radially inner side R1 of the first cover member 91 is in contact with the second cover member 92 from the first axial side L1, the first cover member 91 is connected to the first cover member 91 by the first fastening member F1 such as a bolt. The second cover member 92 is joined together. In this manner, the first cover member 91 and the second cover member 92 are joined so as to be separable from each other. Further, in a state in which the end portion of the radially outer side R2 of the first cover member 91 is in contact with the joint surface facing the first axial side L1 of the peripheral wall portion 93 from the first axial side L1, a second fastening such as a bolt is performed. The member F2 joins the first cover member 91 and the peripheral wall portion 93 to each other.

Further, in this embodiment, the first cover member 91 includes a stator support portion 911 that supports the stator 11 of the rotary electric machine 1 . In this embodiment, the stator support portion 911 is formed in a tubular shape having an axial center along the axial direction L. As shown in FIG. The stator support portion 911 is formed so as to protrude from the main portion of the first cover member 91, which extends along the radial direction R, toward the second side L2 in the axial direction.

The second cover member 92 rotatably supports the second support member 72 of the rotor support member 7 . Here, the second cover member 92 and the second support member 72 are integrated in a relatively rotatable state via the first bearing B1. The first bearing B1 corresponds to a "support bearing". In this embodiment, the second cover member 92 rotatably supports the input member 2 via the second bearing B2. Here, the input member 2 is arranged so as to pass through the second cover member 92 in the axial direction L, and the second bearing B2 is arranged between the input member 2 and the second cover member 92 . In this example, each of the first bearing B1 and the second bearing B2 is a ball bearing.

In addition, in the present embodiment, the second cover member 92 is arranged so that the entire second cover member 92 is positioned radially inward R<b>1 from the inner peripheral surface 71 a of the first support member 71 . The “inner peripheral surface 71a of the first support member 71” includes the first spline grooves 71b and the like formed in the inner peripheral surface 71a. Here, the second cover member 92 is arranged so that the entire second cover member 92 is located radially inward R1 from the edge of the radially inner side R1 of the inner peripheral surface 71a.

Thus, in this embodiment, the first support member 71 is formed in a cylindrical shape having an axis along the axial direction L,
The second support member 72 and the regulating member 10 are engaged with the inner peripheral surface of the first support member 71,
The second cover member 92 is arranged so that the entire second cover member 92 is positioned radially inward R<b>1 from the inner peripheral surface 71 a of the first support member 71 .

According to this configuration, in the manufacturing process of the vehicle drive device 100, the module integrated with the second cover member 92, the second support member 72, and the first bearing B1 is integrated with the first support member 71 and the second support member. 72 are assembled to the module including the first support member 71 so that the second cover member 72 is non-rotatably engaged with the second cover member 72, and then the regulating member 10 is relatively moved in the axial direction L with respect to the modules. The restricting member 10 can be engaged with the inner peripheral surface 71 a of the first supporting member 71 without interfering with the 92 . In this way, the configuration is such that the regulating member 10 can be easily assembled.

As shown in FIG. 3, in this embodiment, the second cover member 92 has an inner support portion 921 formed in a tubular shape having an axis along the axial direction L. As shown in FIG. In this embodiment, the inner support portion 921 protrudes from the end of the radially inner side R1 of the portion extending along the radial direction R, which is the body portion of the second cover member 92, toward the second axial side L2. is formed in

Further, in this embodiment, the second support member 72 has an outer support portion 721 formed in a tubular shape having an axis along the axial direction L. As shown in FIG. The inner support portion 921 is arranged radially inward R<b>1 from the outer support portion 721 . In this embodiment, the outer support portion 721 protrudes from the radially inner side R1 end portion of the portion extending along the radial direction R, which is the body portion of the second support member 72, toward the second axial side L2. is formed in

In this embodiment, the first bearing B1 is arranged between the inner support portion 921 and the outer support portion 721 in the radial direction R. A second bearing B<b>2 is arranged between the inner support portion 921 and the input member 2 .

The vehicle drive device 100 further includes a second restricting mechanism Rb that restricts relative movement in the axial direction L among the second support member 72, the first bearing B1, and the second cover member 92. As shown in FIG. In this example, an outer step surface 72a facing the second axial side L2 is formed on the inner peripheral surface of the outer support portion 721 . An inner step surface 92a facing the second axial side L2 is formed on the outer peripheral surface of the inner support portion 921 . Each of the outer stepped surface 72a and the inner stepped surface 92a is formed so that the first bearing B1 abuts from the axial second side L2. Further, the outer restricting member 20 is fixed to the inner peripheral surface of the outer supporting portion 721 so as to abut on the first bearing B1 from the second side L2 in the axial direction. An inner restricting member 30 is fixed to the outer peripheral surface of the inner support portion 921 so as to abut against the first bearing B1 from the second side L2 in the axial direction. In this example, each of the outer restricting member 20 and the inner restricting member 30 is a snap ring formed annularly along the circumferential direction of the outer supporting portion 721 and the inner supporting portion 921 . An engagement groove with which the outer restricting member 20 engages is formed in the inner peripheral surface of the outer support portion 721 . An engagement groove with which the inner regulation member 30 engages is formed on the outer peripheral surface of the inner support portion 921 .

Thus, the outer stepped surface 72a of the outer support portion 721 restricts the relative movement of the first bearing B1 to the outer support portion 721 toward the first side L1 in the axial direction. Then, the outer restricting member 20 restricts the relative movement of the first bearing B1 with respect to the outer supporting portion 721 toward the axial second side L2. In addition, the inner step surface 92a of the inner support portion 921 restricts the relative movement of the first bearing B1 with respect to the inner support portion 921 toward the first side L1 in the axial direction. Then, the inner restricting member 30 restricts the relative movement of the first bearing B1 to the inner support portion 921 toward the axial second side L2. Thus, in this example, the outer stepped surface 72a, the outer restricting member 20, the inner stepped surface 92a, and the inner restricting member 30 function as the second restricting mechanism Rb.

Thus, in the present embodiment, the vehicle drive system 100
a first restricting mechanism Ra that restricts the relative movement of the second supporting member 72 to the second axial side L2 with respect to the first supporting member 71;
A second restricting mechanism Rb that restricts relative movement in the axial direction L of the second support member 72, the first bearing B1, and the second cover member 92 is provided.

According to this configuration, the relative movement of the first support member 71 to the second cover member 92 toward the first side L1 in the axial direction is controlled by the first regulation mechanism Ra and the second regulation mechanism Rb via the second support member 72. Regulated. Therefore, the joint housing 6 expands (so-called ballooning) due to the hydraulic pressure inside the joint housing 6 , and the first support member 71 fixed to the joint housing 6 moves toward the case 9 on the first side in the axial direction. You can restrict moving to L1. Therefore, the rotor 12 connected to the first support member 71 can be restricted from shifting in the axial direction L with respect to the stator 11 .

As shown in FIG. 3, the engagement device 3 is arranged radially inward R1 with respect to the first support member 71 and between the joint housing 6 and the second support member 72 in the axial direction L. . In this embodiment, the engagement device 3 includes a first friction member 31 and a first piston 32 that presses the first friction member 31 in the axial direction L. As shown in FIG.

The first friction member 31 includes a first inner friction material 311 and a first outer friction material 312 . The first inner friction material 311 and the first outer friction material 312 are both formed in the shape of an annular plate and arranged coaxially with each other. A plurality of first inner friction members 311 and a plurality of first outer friction members 312 are provided and arranged alternately along the axial direction L. As shown in FIG. One of the first inner friction material 311 and the first outer friction material 312 can be a friction plate, and the other can be a separate plate.

In this embodiment, the first outer friction material 312 is supported from the radially outer side R2 by the first support member 71 . In this example, the inner peripheral surface 71a of the first support member 71 is formed with a plurality of second spline grooves 71d. A plurality of spline grooves that engage with the plurality of second spline grooves 71d are formed at the radially outer R2 end portion of the first outer friction material 312 . The plurality of spline grooves in the first outer friction material 312 are engaged with the plurality of second spline grooves 71 d in the first support member 71 , so that the first outer friction material 312 extends along the inner peripheral surface 71 a of the first support member 71 . is slidably supported in the axial direction L in a state in which relative rotation is regulated.

The plurality of second spline grooves 71d are formed such that the inner peripheral surface 71a of the first support member 71 is recessed radially outward R2. Although not shown, the plurality of second spline grooves 71d are distributed over the entire circumferential direction of the inner peripheral surface 71a of the first support member 71 at equal intervals. In the illustrated example, the plurality of second spline grooves 71d extend from the end on the first axial side L1 of the inner peripheral surface 71a of the first support member 71 to the second axial side L2 of the first spline groove 71b. It is formed continuously over the portion on the second side L2 in the axial direction from the end portion. Therefore, in the illustrated example, the first outer friction member 312 can be separated from the first support member 71 by moving relative to the first support member 71 toward the first side L1 in the axial direction.

The first inner friction member 311 is supported from the radially inner side R1 by the first inner support member 21 that is connected to the input member 2 so as to rotate integrally therewith. The first inner support member 21 includes a first inner cylindrical portion 21a formed in a cylindrical shape having an axis along the axial direction L. As shown in FIG.

In this embodiment, the first inner support member 21 is connected to the input member 2 via a flange member 22 extending along the radial direction R so as to rotate integrally therewith. The first inner support member 21 is connected to the flange member 22 so that the first inner cylindrical portion 21a protrudes from the flange member 22 toward the axial first side L1. In this embodiment, the radially inner R1 end of the flange member 22 is fixed to the axially second side L2 end of the input member 2 . On the other hand, the radially outer R2 end of the flange member 22 is arranged to support the first friction member 31 from the second axial side L2.

In this example, a plurality of spline grooves extending in the axial direction L are formed in the outer peripheral portion of the first inner cylindrical portion 21a in a dispersed manner in the circumferential direction. On the other hand, similar spline grooves are also formed in the inner peripheral portion of the first inner friction material 311 so as to be dispersed in the circumferential direction. By engaging the spline grooves with each other, the first inner friction member 311 is supported by the first inner tubular portion 21a from the radially inner side R1. In this way, the first inner friction member 311 is slidably supported in the axial direction L while its relative rotation is restricted with respect to the first inner tubular portion 21a.

The first piston 32 is configured to press the first friction member 31 in the axial direction L. As shown in FIG. In this embodiment, the first piston 32 has a pressing portion 321 and a sliding portion 322 .

In this embodiment, the pressing portion 321 is arranged adjacent to the first friction member 31 on the axial first side L1. In the illustrated example, the pressing portion 321 is arranged so as to overlap the first bearing B1 when viewed in the radial direction R. As shown in FIG. In the present embodiment, regarding the arrangement of two elements, "overlapping in a particular direction view" means that when a virtual straight line parallel to the viewing direction is moved in each direction orthogonal to the virtual straight line, the virtual straight line indicates that there is at least a part of a region where the crosses both of the two elements.

In this embodiment, the sliding portion 322 is biased toward the axial first side L1 by a first biasing member 33 such as a spring. In addition, in the present embodiment, the sliding portion 322 includes the radially outer R2 end portion of the oil chamber forming member 23 formed to extend radially outwardly R2 from the input member 2 and the outer periphery of the input member 2 . It is configured to slide on the portion on the second side L2 in the axial direction rather than the oil chamber forming member 23 on the surface. In the illustrated example, the sliding portion 322 extends along the radial direction R from the pressing portion 321 to the radially inner side R1 of the first inner cylindrical portion 21a of the first inner support member 21, and from there, the oil chamber It extends along the axial direction L from the forming member 23 to the second side L2 in the axial direction, and further extends radially inward R1. Therefore, in the illustrated example, the sliding portion 322 is arranged so as to overlap the first friction member 31 when viewed in the radial direction R. As shown in FIG.

The oil chamber forming member 23 is connected to the input member 2 so as to rotate integrally therewith. In this embodiment, a working oil chamber is formed between the oil chamber forming member 23 and the sliding portion 322 in the axial direction L. As shown in FIG. When hydraulic pressure is supplied to the hydraulic oil chamber, the first piston 32 slides to the axial second side L2 against the biasing force of the first biasing member 33 according to the hydraulic pressure, and the first friction member 31 is pressed to the second axial side L2.

As shown in FIG. 2, in the present embodiment, the lockup engagement device 53 is arranged on the first side L1 in the axial direction relative to the joint input side member 51 and the joint output side member 52 inside the joint housing 6. .

In this embodiment, the coupling housing 6 of the fluid coupling 4 includes a first support portion 61, a first side portion 62, a first peripheral portion 63, a second peripheral portion 64, a second side portion 65, and a It has three side portions 66 and a second support portion 67 .

The first support portion 61 is formed to extend radially outward R<b>2 from the rotational axis of the joint housing 6 . The first support portion 61 is rotatably supported relative to the input member 2 via the third bearing B3. In this embodiment, the third bearing B3 is a thrust bearing arranged between the first support portion 61 and the input member 2 in the axial direction L. As shown in FIG.

The first side portion 62 is formed to cover the first side L1 in the axial direction with respect to the lockup engagement device 53 . In this embodiment, the first side portion 62 is formed in an annular plate shape extending radially outward R2 from the first support portion 61 .

The first circumferential portion 63 is formed to cover the radially outer side R2 of the lockup engagement device 53 . In the present embodiment, the first peripheral portion 63 is formed in a tubular shape extending from the radially outer side R2 end portion of the first side portion 62 to the axial second side L2.

The second circumferential portion 64 is formed so as to cover the radial outer side R2 of the joint input side member 51 and the joint output side member 52 . In this embodiment, the second peripheral portion 64 is formed in a tubular shape arranged radially outward R<b>2 relative to the first peripheral portion 63 .

The second side portion 65 is formed to connect the first peripheral portion 63 and the second peripheral portion 64 . In the present embodiment, the second side portion 65 is an annular ring connecting the end of the first peripheral portion 63 on the second axial side L2 and the end of the second peripheral portion 64 on the first axial side L1. It is formed like a plate.

The third side portion 66 is formed to cover the second axial side L2 of the joint input side member 51 . In this embodiment, the third side portion 66 extends along the outer shape of the joint input side member 51 from the end portion of the second circumferential portion 64 on the axial second side L2 toward the radially inner side R1. is formed in

The second support portion 67 is rotatably supported with respect to the side wall portion 94 of the case 9 via the fourth bearing B4. In this embodiment, the second support portion 67 is formed in a tubular shape extending from the radially inner side R1 end of the third side portion 66 to the axial second side L2. The second support portion 67 is rotatably supported from the radially outer side R2 by the side wall portion 94 via the fourth bearing B4. In this example, the fourth bearing B4 is a needle roller bearing.

In this embodiment, the first support member 71 of the rotor support member 7 extends from the first side portion 62 covering the first axial side L1 of the lockup engagement device 53 to the first axial side L1. It is fixed to the first side 62 . Therefore, in the present embodiment, the rotor support member 7 is arranged on the first side L1 in the axial direction with respect to the lockup engagement device 53 .

Thus, in this embodiment, the joint main body 5 includes a joint input side member 51 that is connected to the joint housing 6 so as to rotate integrally, and a joint output side member 52 that forms a pair with the joint input side member 51. and a lockup engaging device 53 that selectively engages the joint input side member 51 and the joint output side member 52,
The lockup engagement device 53 is arranged on the first side L1 in the axial direction relative to the joint input side member 51 and the joint output side member 52 inside the joint housing 6,
The rotor support member 7 is arranged on the axial first side L<b>1 relative to the lockup engagement device 53 .

According to this configuration, compared to the configuration in which the rotor support member 7 overlaps the lockup engagement device 53 when viewed in the radial direction R, the arrangement space of the lockup engagement device 53 in the radial direction R is reduced. Large and easy to secure. Therefore, it is easy to secure a large transmission torque capacity of the lockup engagement device 53 while keeping the dimension of the lockup engagement device 53 in the axial direction L small.

In the present embodiment, the lockup engagement device 53 is arranged so as to overlap the rotor 12 of the rotary electric machine 1 when viewed in the axial direction L. As shown in FIG. Further, the lock-up engaging device 53 is configured such that, when viewed in the radial direction R, the coil end portion 112 on the second side L2 in the axial direction of the rotating electric machine 1 and the connection member 14 connected to the coil end portion 112 are connected to each other. It is arranged so as to overlap with at least one. In the illustrated example, the lockup engaging device 53 is arranged so as to overlap the connecting member 14 when viewed in the radial direction R. As shown in FIG.

In the present embodiment, the coil end portion 112 and the connection member 14 on the axial second side L2 of the rotating electric machine 1 are spaces adjacent to the first circumferential portion 63 of the joint housing 6 on the radially outer side R2, It is arranged in a space adjacent to the second side portion 65 of the joint housing 6 on the axial first side L1. In other words, the coil end portion 112 and the connection member 14 are arranged at positions overlapping the joint housing 6 both when viewed in the radial direction R and when viewed axially along the axial direction L.

As shown in FIG. 3, in this embodiment, the lockup engagement device 53 includes a second friction member 54 and a second piston 55 that presses the second friction member 54 in the axial direction L. .

The second friction member 54 includes a second inner friction material 541 and a second outer friction material 542 . Both the second inner friction material 541 and the second outer friction material 542 are formed in the shape of an annular plate and arranged coaxially with each other. A plurality of second inner friction members 541 and a plurality of second outer friction members 542 are provided and arranged alternately along the axial direction L. As shown in FIG. One of the second inner friction material 541 and the second outer friction material 542 can be a friction plate, and the other can be a separate plate.

The second inner friction member 541 is supported from the radially inner side R1 by the second inner support member 41 that is connected to the joint housing 6 so as to rotate integrally therewith. The second inner support member 41 includes a second inner cylindrical portion 41a formed in a cylindrical shape having an axis along the axial direction L. As shown in FIG. In this embodiment, the second inner support member 41 is connected to the first side portion 62 of the joint housing 6 so that the second inner cylindrical portion 41a protrudes from the first side portion 62 of the joint housing 6 toward the axial second side L2. It is

In this example, a plurality of spline grooves extending in the axial direction L are formed in the outer peripheral portion of the second inner cylindrical portion 41a so as to be dispersed in the circumferential direction. On the other hand, similar spline grooves are also formed in the inner peripheral portion of the second inner friction material 541 so as to be dispersed in the circumferential direction. By engaging the spline grooves with each other, the second inner friction member 541 is supported by the second inner cylindrical portion 41a from the radially inner side R1. In this way, the second inner friction member 541 is slidably supported in the axial direction L while its relative rotation is restricted with respect to the second inner tubular portion 41a.

The second outer friction material 542 is supported from the radially outer side R2 by the outer support member 42 that is connected to the joint output side member 52 so as to rotate integrally therewith. The outer support member 42 includes an outer tubular portion 42a formed in a tubular shape having an axis along the axial direction L. As shown in FIG.

In this example, a plurality of spline grooves extending in the axial direction L are formed in the inner peripheral portion of the outer tubular portion 42a so as to be dispersed in the circumferential direction. On the other hand, the outer peripheral portion of the second outer friction material 542 is also formed with similar spline grooves dispersed in the circumferential direction. By engaging the spline grooves with each other, the second outer friction material 542 is supported from the radially outer side R2 by the outer cylindrical portion 42a. Thus, the second outer friction member 542 is slidably supported in the axial direction L while its relative rotation is restricted with respect to the outer cylindrical portion 42a.

The second piston 55 is configured to press the second friction member 54 in the axial direction L. As shown in FIG. In this embodiment, the second piston 55 is arranged adjacent to the second friction member 54 on the axial second side L2. The second piston 55 is biased toward the axial second side L2 by a second biasing member 56 such as a spring. In this embodiment, when hydraulic pressure is supplied to the hydraulic oil chamber formed adjacent to the second axial side L2 of the second piston 55, the biasing force of the second biasing member 56 is applied according to the hydraulic pressure. The second piston 55 slides to the first side L1 in the axial direction, and presses the second friction member 54 to the second side L2 in the axial direction.

As shown in FIG. 3 , in this embodiment, the vehicle drive system 100 further includes a rotation sensor 8 that detects rotation of the rotor 12 of the rotating electric machine 1 . In this embodiment, the rotation sensor 8 includes a sensor stator 81 and a sensor rotor 82 rotatably supported with respect to the sensor stator 81 . In this example, the rotation sensor 8 is configured as a resolver. Therefore, the rotation sensor 8 detects the phase of the AC voltage according to the relative angle of the sensor rotor 82 with respect to the sensor stator 81 when an AC current is passed through the coil provided in the sensor stator 81, and detects the rotation of the rotor 12. Detect location. It should be noted that the rotation sensor 8 is not limited to a resolver, and can be composed of various sensors such as a Hall element sensor, an encoder, and a magnetic rotation sensor.

The sensor stator 81 is fixed to the case 9 . In this embodiment, the sensor stator 81 is fixed to the second cover member 92 of the case 9 so as to protrude radially outward R2 from the second cover member 92 . Further, the sensor stator 81 is arranged adjacent to the second support member 72 on the axial first side L1.

Sensor rotor 82 is coupled to rotate integrally with rotor 12 . In this embodiment, the sensor rotor 82 is engaged with the inner peripheral surface 71 a of the first support member 71 .

In this example, the inner peripheral surface 71a of the first support member 71 is formed with a plurality of third spline grooves 71e. A plurality of spline grooves that engage with the plurality of third spline grooves 71e are formed at the radially outer R2 end portion of the sensor rotor 82 . The plurality of third spline grooves 71e are formed such that the inner peripheral surface 71a of the first support member 71 is recessed radially outward R2. Although not shown, the plurality of third spline grooves 71e are distributed over the entire circumferential direction of the inner peripheral surface 71a of the first support member 71 at equal intervals. In the illustrated example, the plurality of third spline grooves 71e are formed on the inner peripheral surface 71a of the first support member 71 from the end of the first axial side L1 to the first axial side of the mounting position of the regulating member 10. It is formed continuously over the portion of L1. Therefore, in the illustrated example, the sensor rotor 82 can be separated from the first support member 71 by moving relative to the first support member 71 toward the first side L1 in the axial direction.

In this example, the inner peripheral surface 71a of the first support member 71 is formed with a second restricting surface 71f facing the first side L1 in the axial direction. The second restricting surface 71f is formed so that the engaging portion of the sensor rotor 82 with the first support member 71 abuts from the axial direction first side L1. Here, the second restricting surface 71f is formed as a terminal surface on the axial second side L2 of the plurality of third spline grooves 71e.

Further, in this example, the sensor restricting member 40 that restricts the relative movement of the sensor rotor 82 to the axial direction first side L1 with respect to the first supporting member 71 is engaged with the inner peripheral surface 71a of the first supporting member 71. there is The sensor restricting member 40 is arranged to contact the sensor rotor 82 from the first axial side L1.

As described above, the vehicle drive system 100
an input member 2 drivingly connected to the internal combustion engine EG;
a rotating electric machine 1 including a rotor 12;
a rotor support member 7 that supports the rotor 12;
an engaging device 3 for connecting and disconnecting power transmission between the input member 2 and the rotor 12;
a fluid coupling 4 comprising a coupling body 5 and a coupling housing 6 accommodating the coupling body 5;
a rotating electric machine 1, a rotor support member 7, an engagement device 3, and a case 9 that houses the fluid coupling 4,
A direction along the rotation axis of the rotor 12 is defined as an axial direction L, one side of the axial direction L is defined as a first axial side L1, and the other side of the axial direction L is defined as a second axial side L2,
The rotating electric machine 1 is arranged on the axial first side L1 with respect to the fluid coupling 4,
The rotor support member 7 includes a first support member 71 arranged radially inward R1 with respect to the rotor 12 and coupled to rotate integrally with the rotor 12, and a radial direction relative to the first support member 71. a second support member 72 arranged on the inner side R1 and supporting the first support member 71 from the radial inner side R1;
The first support member 71 is non-separably fixed to the joint housing 6 and arranged to protrude from the joint housing 6 toward the first side L1 in the axial direction,
The engagement device 3 is arranged radially inward R1 with respect to the first support member 71 and between the joint housing 6 and the second support member 72 in the axial direction L,
The first support member 71 and the second support member 72 are engaged with each other so as not to rotate relative to each other, and are configured to be separable in the axial direction L,
A regulating member 10 is provided for regulating the relative movement of the second supporting member 72 to the first axial side L1 with respect to the first supporting member 71,
The case 9 includes a first cover member 91 that covers the first side L1 in the axial direction of the rotating electric machine 1, and a second cover member 92 that is joined to the first cover member 91 and rotatably supports the second support member 72. , and
The second cover member 92 and the second support member 72 are integrated with each other through the first bearing B1 so as to be relatively rotatable,
The first cover member 91 and the second cover member 92 are joined in a separable manner.

According to this configuration, the first support member 71 of the rotor support member 7 is fixed to the joint housing 6 inseparably. Therefore, it is not necessary to provide fastening members such as bolts to connect the rotor support member 7 and the joint housing 6 . Therefore, it is easy to secure a large space inside the joint housing 6 while keeping the dimension of the vehicle drive device 100 in the axial direction L small. For example, when the lockup engagement device 53 is arranged in the portion on the first axial side L1 inside the joint housing 6, the dimension of the vehicle drive device 100 in the axial direction L can be kept small, and the lockup engagement device 53 can be It is easy to secure a large arrangement space for the engaging device 53 .
By the way, when the first support member 71 is inseparably fixed to the joint housing 6 in this way, the second support member 72 and the joint housing support the first support member 71 from the radially inner side R1. It becomes difficult to dispose the engaging device 3 in the axial direction L with 6. However, according to this configuration, since the first support member 71 and the second support member 72 are separable in the axial direction L, there is a gap between the second support member 72 and the joint housing 6 in the axial direction L. An engagement device 3 can be arranged.
In addition, when the first support member 71 and the second support member 72 are configured to be separable in the axial direction L in this way, the second support member 72 moves toward the first side L1 in the axial direction with respect to the first support member 71. It is necessary to provide a restricting member 10 that restricts relative movement. When the first cover member 91 that covers the first side L1 in the axial direction of the rotating electric machine 1 and the second cover member 92 that rotatably supports the second support member 72 are integrally formed, such regulation is possible. Assembly of the member 10 is difficult. However, according to this configuration, the first cover member 91 and the second cover member 92 are separable from each other. Furthermore, the second cover member 92 and the second support member 72 are integrated with each other through the first bearing B1 so as to be relatively rotatable. Therefore, in the manufacturing process of the vehicle drive device 100, a module in which the second cover member 92, the second support member 72, and the first bearing B1 are integrated is arranged so that the first support member 71 and the second support member 72 face each other. After the module including the first support member 71 is assembled so as to be non-rotatably engaged, the regulating member 10 is assembled to those modules, and then the first cover member 91 is joined to the second cover member 92 . be able to. Therefore, the configuration is such that the regulating member 10 can be easily assembled.

Below, the manufacturing process S100 of the vehicle drive device 100 according to the embodiment will be described with reference to the drawings. As shown in FIG. 4, the manufacturing process S100 includes a joint module manufacturing process S1, an input module manufacturing process S2, a support module manufacturing process S3, a first assembly process S4, a second assembly process S5, and a second assembly process S5. A third assembly process S6 and a fourth assembly process S7 are provided.

The joint module production step S1 is a step of producing the joint module M1. As shown in FIG. 5, the joint module M1 is a module including the fluid joint 4, the first support member 71, and the rotor 12. As shown in FIG. In the joint module manufacturing step S1, the rotor 12 is positioned on the first side L1 in the axial direction with respect to the fluid coupling 4 and is supported from the radially inner side R1 by the first support member 71 fixed to the joint housing 6. Next, the first support member 71 and the rotor 12 are assembled together to produce the joint module M1.

In the joint module manufacturing step S1 of the present embodiment, the outer peripheral surface of the first support member 71 and the inner peripheral surface of the rotor 12 are in contact with each other, and the rotor 12 is supported from both sides in the axial direction L by the pair of holders 13. , the rotor 12 and the pair of holders 13 are assembled to the first support member 71 .

The input module manufacturing process S2 is a process of manufacturing the input module M2. As shown in FIG. 6, the input module M2 is a module that includes an input member 2 and an engaging device 3. As shown in FIG. In the input module manufacturing step S2, the input member 2 and the engaging device 3 are assembled together to manufacture the input module M2.

In the input module manufacturing step S2 of the present embodiment, a plurality of first inner friction members 311 and a plurality of first outer friction members 312 are alternately arranged in the axial direction L, and the plurality of first inner friction members 311 are formed. It is assembled to the first inner support member 21 . The sliding portion 322 is urged toward the first side L1 in the axial direction by the first urging member 33, and pushes the radially outer R2 end portion of the oil chamber forming member 23 and the outer peripheral surface of the input member 2 to each other. The input member 2, the oil chamber forming member 23, the first piston 32, and the first biasing member 33 are assembled together so as to slide. Further, the third bearing B3 is assembled to the input member 2 from the second axial side L2.

The support module manufacturing step S3 is a step of manufacturing the support module M3. As shown in FIG. 7, the support module M3 is a module including a second support member 72, a second cover member 92, and a first bearing B1. In the support module manufacturing step S3, the second support member 72, the second cover member 92, and the first bearing are arranged so that the second support member 72 is rotatably supported by the second cover member 92 via the first bearing B1. B1 are assembled together to form a support module M3.

In the support module manufacturing step S3 of the present embodiment, the outer step surface 72a formed on the inner peripheral surface of the outer support portion 721 of the second support member 72 and the outer peripheral surface of the inner support portion 921 of the second cover member 92 are formed. The first bearing B1 is brought into contact with the formed inner step surface 92a from the axial second side L2. After that, the outer restricting member 20 is fixed to the inner peripheral surface of the outer supporting portion 721 in a state of contacting the first bearing B1 from the axial second side L2, and the inner restricting member 30 is attached to the first bearing B1. It is fixed to the outer peripheral surface of the inner support portion 921 in a state of contact from the axial second side L2. Also, the second bearing B2 is assembled to the second cover member 92 so that the second bearing B2 is supported by the second cover member 92 from the radially outer side R2. Furthermore, the sensor stator 81 is fixed to the second cover member 92 so that the sensor stator 81 protrudes radially outward R2 from the second cover member 92 .

The first assembling step S4 is a step of assembling the input module M2 to the joint module M1. The first assembling step S4 is performed after the joint module manufacturing step S1 and the input module manufacturing step S2. The first assembly step S4 may be performed after the joint module fabrication step S1, the input module fabrication step S2, and the support module fabrication step S3. Note that the execution order of the joint module manufacturing process S1, the input module manufacturing process S2, and the support module manufacturing process S3 is not limited.

In this embodiment, as shown in FIG. 5, a joint module assembling step of assembling the joint module M1 to the case 9 is performed before the first assembling step S4. In the joint module assembling step, the joint module M1 is mounted so that the second support portion 67 of the joint housing 6 is rotatably supported from the radially outer side R2 by the side wall portion 94 of the case 9 via the fourth bearing B4. Assemble to case 9.

As shown in FIG. 6, in the first assembling step S4, the input module M2 is axially mounted with respect to the joint module M1 so that the engaging device 3 is positioned radially inward R1 with respect to the first support member 71. As shown in FIG. Assemble from the first side L1. In the first assembling step S4 of the present embodiment, the plurality of second spline grooves 71d formed in the inner peripheral surface 71a of the first support member 71 are provided with the ends of the radially outer side R2 of the first outer friction member 312. A plurality of formed spline grooves are engaged. Further, the third bearing B3 assembled to the input member 2 is axially firstly mounted on the first support portion 61 of the joint housing 6 so that the input member 2 and the joint housing 6 rotate relative to each other via the third bearing B3. Abut from the side L1.

As shown in FIG. 7, the second assembling step S5 is a step of assembling the support module M3 to the joint module M1 and the input module M2. The second assembling step S5 is performed after the first assembling step S4. In the second assembling step S5, the first support member 71 and the second support member 72 are engaged with each other so as not to rotate relative to each other while the second support member 72 is positioned radially inward R1 with respect to the first support member 71. The support module M3 is assembled to the joint module M1 and the input module M2 from the first axial side L1 so as to mate. In the second assembling step S5 of the present embodiment, the plurality of first spline grooves 71b formed in the inner peripheral surface 71a of the first support member 71 are formed at the radially outer R2 end portion of the second support member 72. engaged a plurality of spline grooves. After that, the second support member 72 is moved to the second side L2 in the axial direction with respect to the first support member 71 until the second support member 72 comes into contact with the first restricting surface 71c. Also, the second bearing B2 is assembled to the input member 2 so that the second bearing B2 rotatably supports the input member 2 from the radially outer side R2.

As shown in FIG. 7, the third assembling step S6 is a step of assembling the regulating member 10 to the joint module M1 and the support module M3. The third assembling step S6 is performed after the second assembling step S5. In the third assembling step S6, the restricting member 10 is assembled to the joint module M1 and the support module M3 from the first axial side L1. In the third assembling step S6 of the present embodiment, the restricting member 10 is moved axially second relative to the support module M3 so that the restricting member 10 passes through the radially outer side R2 of the second cover member 92 and the sensor stator 81 . Move to side L2. Then, the regulation member 10 is engaged with the inner peripheral surface 71a of the first support member 71 so that the regulation member 10 contacts the second support member 72 from the axial direction first side L1.

In this embodiment, as shown in FIG. 8, after the third assembling step S6 and before the fourth assembling step S7, the sensor rotor 82 of the rotation sensor 8 is assembled to the first supporting member 71. A rotor assembly process is performed. In the sensor rotor assembling process, the plurality of spline grooves formed at the radially outer R2 end portion of the sensor rotor 82 are inserted into the plurality of third spline grooves 71e formed in the inner peripheral surface 71a of the first support member 71. Engage. Then, the sensor rotor 82 is moved to the second side L2 in the axial direction with respect to the first support member 71 until the sensor rotor 82 comes into contact with the second restricting surface 71f. After that, the sensor restricting member 40 is engaged with the inner peripheral surface 71a of the first supporting member 71 so that the sensor restricting member 40 contacts the sensor rotor 82 from the axial direction first side L1.

As shown in FIG. 9, the fourth assembling step S7 is a step of assembling the first cover member 91 to the support module M3. The fourth assembling step S7 is performed after the third assembling step S6. In the fourth assembling step S7, the first cover member 91 covers the axial direction first side L1 of the rotary electric machine 1, and the first cover member 91 and the second cover member 92 are joined to each other. The cover member 91 is assembled to the support module M3 from the first axial side L1. In the fourth assembling step S<b>7 of the present embodiment, the stator 11 is assembled to the first cover member 91 so that the stator 11 of the rotating electric machine 1 is supported by the stator support portion 911 of the first cover member 91 . Then, the end portion of the radially inner side R1 of the first cover member 91 is brought into contact with the second cover member 92 from the axial first side L1, and they are joined by the first fastening member F1. In addition, the end portion of the radially outer side R2 of the first cover member 91 is brought into contact with the end portion of the peripheral wall portion 93 on the first axial side L1 from the first axial side L1, and these are held together by the second fastening member F2. Join.

As described above, the manufacturing process S100 of the vehicle drive device 100 includes:
An input member 2 drivingly connected to the internal combustion engine EG, a rotary electric machine 1 having a rotor 12 , a rotor support member 7 supporting the rotor 12 , and an engagement for connecting and disconnecting power transmission between the input member 2 and the rotor 12 . A coupling device 3, a fluid coupling 4 having a joint body 5 and a joint housing 6 accommodating the joint body 5, and a case 9 accommodating the rotary electric machine 1, the rotor support member 7, the engagement device 3, and the fluid coupling 4. and a manufacturing process S100 of the vehicle drive device 100,
A direction along the rotation axis of the rotor 12 is defined as an axial direction L, one side of the axial direction L is defined as a first axial side L1, and the other side of the axial direction L is defined as a second axial side L2,
The rotor support member 7 includes a first support member 71 that is inseparably fixed to the joint housing 6 so as to protrude from the joint housing 6 to the first side L1 in the axial direction. a second support member 72 coupled to the first support member 71 for support from R1;
The case 9 includes a first cover member 91 and a second cover member 92 configured to be joined together,
The rotor 12 is located on the first side L1 in the axial direction with respect to the fluid coupling 4 and is supported by the first support member 71 fixed to the joint housing 6 from the radially inner side R1. a joint module manufacturing step S1 for manufacturing a joint module M1 by assembling the rotor 12 and the
an input module manufacturing step S2 for manufacturing an input module M2 by assembling the input member 2 and the engaging device 3;
The second support member 72, the second cover member 92, and the first bearing B1 are assembled together and supported such that the second support member 72 is rotatably supported by the second cover member 92 via the first bearing B1. a support module manufacturing step S3 for manufacturing the module M3;
a first assembling step S4 of assembling the input module M2 to the joint module M1 from the axial first side L1 such that the engaging device 3 is positioned radially inward R1 with respect to the first support member 71;
This is a step that is performed after the first assembling step S4, in which the first support member 71 and the second support member are assembled in a state in which the second support member 72 is positioned radially inward R1 with respect to the first support member 71. a second assembling step S5 of assembling the support module M3 to the joint module M1 and the input module M2 from the axial direction first side L1 so that the joint module M1 and the input module M2 are engaged with each other in a non-rotatable manner;
In a step that is executed after the second assembling step S5, the restricting member 10 that restricts the relative movement of the second supporting member 72 to the first axial side L1 with respect to the first supporting member 71 is provided in the joint module M1 and the joint module M1. a third assembling step S6 of assembling the supporting module M3 from the first side L1 in the axial direction;
This step is executed after the third assembling step S6, in which the first cover member 91 covers the first axial side L1 of the rotating electrical machine 1, and the first cover member 91 and the second cover member 92 are attached to each other. and a fourth assembling step S7 of assembling the first cover member 91 to the support module M3 from the axial first side L1 so as to be joined.

According to this configuration, the input module M2 is assembled to the joint module M1 from the axial first side L1 so that the engaging device 3 is positioned radially inward R1 with respect to the first support member 71. After performing step S4, the first support member 71 and the second support member 72 are engaged with each other so as not to rotate relative to each other in a state where the second support member 72 is positioned radially inward R1 with respect to the first support member 71. A second assembling step S5 is performed to assemble the support module M3 to the joint module M1 and the input module M2 from the first axial side L1 so as to fit together. Therefore, even if the first support member 71 is inseparably fixed to the joint housing 6, the joint housing 6 and the second support member 72 that supports the first support member 71 from the radially inner side R1 may be separated from each other. An engagement device 3 can be arranged between the axial directions L. As shown in FIG. As described above, in the configuration in which the first support member 71 is inseparably fixed to the joint housing 6, the space inside the joint housing 6 can be reduced while keeping the dimension of the vehicle drive device 100 in the axial direction L small. Large and easy to secure. Therefore, according to this configuration, it is possible to manufacture the vehicle drive device 100 in which the size of the vehicle drive device 100 in the axial direction L can be kept small and a large space inside the joint housing 6 can be easily secured.
Further, according to this configuration, after the second assembling step S5, the first cover member 91 covers the first side L1 in the axial direction of the rotating electric machine 1, and the first cover member 91 and the second Before the fourth assembling step S7 of assembling the first cover member 91 to the support module M3 from the first side L1 in the axial direction so that the cover member 92 and the cover member 92 are joined to each other, the second cover member 92 is attached to the first support member 71 before the fourth assembly step S7. A third assembling step S6 is performed to assemble the restricting member 10 that restricts the relative movement of the supporting member 72 to the first axial side L1 to the joint module M1 and the supporting module M3 from the first axial side L1. This makes it easier to prevent the restriction member 10 from interfering with the first cover member 91 and the like, so that the assembly of the restriction member 10 can be easily performed.

[Other embodiments]
(1) In the above embodiment, the configuration in which the second support member 72 and the regulating member 10, as well as the sensor rotor 82 and the sensor regulating member 40 are engaged with the inner peripheral surface 71a of the first supporting member 71 is described as an example. did. However, without being limited to such a configuration, for example, the sensor rotor 82 abuts against the second support member 72 from the first side L1 in the axial direction, and the sensor rotor 82 and the sensor restricting member 40 act as the restricting member 10. It is good also as a structure which functions.

(2) In the above embodiment, the configuration in which the entire second cover member 92 is located radially inward R1 of the inner peripheral surface 71a of the first support member 71 has been described as an example. However, without being limited to such a configuration, for example, when the restricting member 10 is a member different from an annular member such as a snap ring, the restricting member 10 can be attached to the first support member 71. If possible, the second cover member 92 may be configured to extend from the inner peripheral surface 71a of the first support member 71 to the radially outer side R2.

(3) In the above embodiment, the configuration in which the lockup engagement device 53 is arranged on the first side L1 in the axial direction relative to the joint input side member 51 and the joint output side member 52 inside the joint housing 6 is taken as an example. explained. However, without being limited to such a configuration, the lockup engagement device 53 is arranged on the second side L2 in the axial direction relative to the joint input side member 51 and the joint output side member 52 inside the joint housing 6. can be

(4) In the above embodiment, the first restricting surface 71c formed on the inner peripheral surface 71a of the first supporting member 71 functions as the first restricting mechanism Ra. However, without being limited to such a configuration, for example, instead of the first restricting surface 71c, a snap ring that contacts the second support member 72 from the axial second side L2 may be used as the first support member 71. may be fixed to the inner peripheral surface 71a.

(5) In the above embodiment, the outer step surface 72a formed on the inner peripheral surface of the outer support portion 721 of the second support member 72, the outer restricting member 20 fixed to the inner peripheral surface, and the second cover A configuration in which the inner step surface 92a formed on the outer peripheral surface of the inner support portion 921 of the member 92 and the inner restricting member 30 fixed to the outer peripheral surface function as the second restricting mechanism Rb has been described as an example. However, without being limited to such a configuration, for example, instead of the outer step surface 72a, a snap ring that abuts against the first bearing B1 from the axial first side L1 may be provided on the inner periphery of the outer support portion 721. It may be fixed to the surface. Further, instead of the inner step surface 92a, a snap ring that abuts against the first bearing B1 from the first side L1 in the axial direction may be fixed to the outer peripheral surface of the inner support portion 921. Further, at least one of these snap rings may be replaced by caulking to restrict relative movement in the axial direction L of the first bearing B1. Alternatively, either the inner peripheral surface of the outer support portion 721 and the outer peripheral surface of the first bearing B1 or the outer peripheral surface of the inner support portion 921 and the inner peripheral surface of the first bearing B1 are press-fitted. , the snap ring may be omitted. These configurations can also function as the second regulation mechanism Rb.

(6) It should be noted that the configurations disclosed in the respective embodiments described above can also be applied in combination with configurations disclosed in other embodiments, as long as there is no contradiction. Regarding other configurations, the embodiments disclosed in this specification are merely examples in all respects. Therefore, various modifications can be made as appropriate without departing from the scope of the present disclosure.

The technology according to the present disclosure includes an input member that is drivingly connected to an internal combustion engine, a rotating electric machine that includes a rotor, a rotor support member that supports the rotor, and an engagement that connects and disconnects power transmission between the input member and the rotor. The present invention can be used for a vehicle drive device including a device, a fluid coupling, and a case that accommodates them, and a method for manufacturing the same.

100: Vehicle drive device, 1: Rotating electric machine, 11: Stator, 12: Rotor, 2: Input member, 3: Engagement device, 4: Fluid coupling, 5: Joint body, 6: Joint housing, 7: Rotor support Members 71: First support member 72: Second support member 9: Case 91: First cover member 92: Second cover member 10: Regulating member B1: First bearing (support bearing) EG : internal combustion engine, L: axial direction, L1: axial direction first side, L2: axial direction second side, R: radial direction, R1: radial direction inner side, R2: radial direction outer side

Claims (5)

an input member drivingly connected to an internal combustion engine;
a rotating electric machine having a rotor;
a rotor support member that supports the rotor;
an engagement device for connecting and disconnecting power transmission between the input member and the rotor;
a fluid coupling including a coupling body and a coupling housing that accommodates the coupling body;
a case that houses the rotating electric machine, the rotor support member, the engagement device, and the fluid coupling,
A direction along the axis of rotation of the rotor is defined as an axial direction, one side of the axial direction is defined as a first side in the axial direction, and the other side in the axial direction is defined as a second side in the axial direction,
The rotating electric machine is arranged on the first side in the axial direction with respect to the fluid coupling,
The rotor support member includes a first support member disposed radially inside the rotor and coupled to rotate integrally with the rotor; a second support member arranged inside and supporting the first support member from the inside in the radial direction;
The first support member is fixed inseparably to the joint housing and arranged to protrude from the joint housing toward the first side in the axial direction,
the engagement device is disposed radially inward of the first support member and between the joint housing and the second support member in the axial direction;
The first support member and the second support member are engaged with each other so as not to rotate relative to each other, and are configured to be separable in the axial direction,
a regulating member that regulates relative movement of the second support member to the first side in the axial direction with respect to the first support member;
The case includes a first cover member that covers the first axial side of the rotating electric machine, and a second cover member that is joined to the first cover member and rotatably supports the second support member. ,
The second cover member and the second support member are integrated with each other through a support bearing so as to be relatively rotatable,
The vehicle drive device, wherein the first cover member and the second cover member are joined to each other in a separable manner. The first support member is formed in a tubular shape having an axis along the axial direction,
the second support member and the regulating member are engaged with the inner peripheral surface of the first support member;
2. The vehicle according to claim 1, wherein the second cover member is arranged so that the entire second cover member is located inside the inner peripheral surface of the first support member in the radial direction. drive. The joint main body includes a joint input side member connected to rotate integrally with the joint housing, a joint output side member paired with the joint input side member, and the joint input side member and the joint output side member. a lockup engagement device that selectively engages the member;
The lock-up engagement device is arranged on the first side in the axial direction of the joint input side member and the joint output side member inside the joint housing,
3. The vehicle drive device according to claim 1, wherein said rotor support member is arranged on the first side in the axial direction with respect to said lockup engagement device. a first restriction mechanism that restricts relative movement of the second support member to the second side in the axial direction with respect to the first support member;
4. The apparatus according to any one of claims 1 to 3, further comprising a second restricting mechanism that restricts relative movement of the second support member, the support bearing, and the second cover member in the axial direction. The vehicle driving device according to . An input member driven and connected to an internal combustion engine, a rotating electric machine having a rotor, a rotor support member supporting the rotor, an engaging device for connecting and disconnecting power transmission between the input member and the rotor, and a joint. Manufacture of a vehicle drive system comprising: a fluid coupling including a main body and a coupling housing accommodating the coupling main body; and a case accommodating the rotating electric machine, the rotor support member, the engaging device, and the fluid coupling a method,
A direction along the axis of rotation of the rotor is defined as an axial direction, one side of the axial direction is defined as a first side in the axial direction, and the other side in the axial direction is defined as a second side in the axial direction,
The rotor support member includes: a first support member fixed inseparably to the joint housing so as to protrude from the joint housing toward the axial direction first side; a second support member supportingly coupled to the first support member;
The case includes a first cover member and a second cover member configured to be joined together,
The rotor is positioned on the first side in the axial direction with respect to the fluid coupling, and is supported from the inside in the radial direction by the first support member fixed to the coupling housing. a joint module fabricating step of fabricating a joint module by assembling members and the rotor;
an input module manufacturing step of manufacturing an input module by assembling the input member and the engaging device;
A support module is manufactured by assembling the second support member, the second cover member, and the support bearing so that the second support member is rotatably supported by the second cover member via the support bearing. a support module fabrication process for
a first assembling step of assembling the input module to the joint module from the first side in the axial direction such that the engaging device is positioned radially inward of the first support member;
A step that is executed after the first assembling step, wherein the first supporting member and the second supporting member are mounted in a state in which the second supporting member is positioned radially inside the first supporting member. a second assembling step of assembling the support module to the joint module and the input module from the first side in the axial direction so that the support member and the support member are non-rotatably engaged;
A step executed after the second assembling step, wherein a restricting member for restricting relative movement of the second supporting member to the first axial side with respect to the first supporting member is provided to the joint module and the a third assembling step of assembling the supporting module from the first side in the axial direction;
A step executed after the third assembling step, wherein the first cover member covers the first axial side of the rotating electrical machine, and the first cover member and the second cover member are attached to each other. and a fourth assembling step of assembling the first cover member to the support module from the first axial side so as to be joined.

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