TECHNICAL FIELD

The present disclosure relates to a vehicle drive device including: a rotary electric machine serving as a driving force source for wheels; and a fluid coupling.

BACKGROUND ART

An example of such a vehicle drive device is disclosed in Patent Document 1 below. Hereinafter, in the description of the background art, reference numerals in Patent Document 1 are quoted in parentheses.

In a vehicle drive device (16) of Patent Document 1, a first rotation member (66) and a second rotation member (64) are selectively coupled via an internal combustion engine cut-off engagement device (26). A flex plate (68) that is extended radially outward with respect to the first rotation member is integrally rotatably coupled to the first rotation member (66). The flex plate (68) is integrally rotatably coupled to a rotation housing of a fluid coupling (22). Specifically, the flex plate (68) and the rotation housing are provided with a plurality of fastening portions along the circumferential direction, and the flex plate (68) and the rotation housing are fastened by the fastening member (78), at each of the plurality of fastening portions.

RELATED ART DOCUMENTS

Patent Documents

Patent Document 1: US Patent Application Publication No. 2015/0166049 Disclosure (paragraphs 0033 and 0034, and FIGS. 2 and 4).

SUMMARY OF THE DISCLOSURE

Problem to be Solved by the Invention

By the way, in the manufacturing step of the vehicle drive device (16) of Patent Document 1, fastening work at each of the plurality of fastening portions is performed through an opening portion (80) of a case (60). At that time, it is necessary to rotate the flex plate (68) and the rotation housing so that a position of the fastening portion, which is a working target, in the circumferential direction corresponds to a position of the opening portion (80) in the circumferential direction.

As a first method, Patent Document 1 discloses a method in which by setting the internal combustion engine cut-off engagement device (26) in an engaged state, rotating the second rotation member (64) that is easily accessible from the outside of the case (60), and rotating the first rotation member (66) and the flex plate (68), the position of the fastening portion, which is the working target among the plurality of fastening portions, in the circumferential direction is made to correspond to the position of the opening portion (80) in the circumferential direction.

Further, as a second method, Patent Document 1 discloses a method in which a plurality of notches (76) is provided on an outer peripheral portion of the flex plate (68) at regular intervals, a tool (84) such as a crowbar or a flat-blade screwdriver is inserted in the notches (76) through an opening portion (80) of the case (60), and in a state in which an internal combustion engine cut-off engagement device (26) is released, the flex plate (68) and the first rotation member (66) are rotated by the tool (84).

However, in any of the above methods, in a state in which none of the fastening portions are fastened, since the flex plate (68) and the rotation housing rotate relative to each other, the work of making the position of the fastening portion that is a working target among the plurality of fastening portions in the circumferential direction correspond to the position of the opening portion (80) in the circumferential direction is likely to be complicated. As a result, there is a problem that man-hours for manufacturing the vehicle drive device (16) are increased.

Therefore, it is desired to realize a technology that can reduce man-hours for manufacturing a vehicle drive device.

Means for Solving the Problem

As the characteristic configuration of the vehicle drive device in view of the above, the vehicle drive device includes: a rotary electric machine that serves as a driving force source for wheels; a first rotation member coupled to a rotor of the rotary electric machine; and a fluid coupling that is disposed on an axial first side, which is one side in an axial direction with respect to the rotary electric machine, and that has a rotation housing, in which a plurality of fastening portions is provided in the first rotation member and the rotation housing along a circumferential direction, the first rotation member and the rotation housing are fastened by a fastening member at each of the plurality of fastening portions, each of the plurality of fastening portions has a first fastening hole that is formed in the first rotation member along the axial direction and in which the fastening member is inserted, and a second fastening hole that is formed in the rotation housing along the axial direction and in which the fastening member is inserted, a locked portion is provided on an outer peripheral portion of one of the first rotation member and the rotation housing, a locking portion is provided on an outer peripheral portion of the other of the first rotation member and the rotation housing, the locking portion is inserted in the axial direction with respect to the locked portion and is locked so that a relative rotation in the circumferential direction is restricted with respect to the locked portion, and the first fastening hole and the second fastening hole are disposed so as to overlap with each other when viewed in the axial direction along the axial direction in a state in which the locking portion is locked to the locked portion.

According to this characteristic configuration, by putting the locking portion in a state of being locked to the locked portion, even when none of the fastening portions are fastened by the fastening member, the relative movement of the first rotation member and the rotation housing in the circumferential direction can be restricted. Thus, even in a state in which none of the fastening portions are fastened by the fastening member, it is possible to maintain a state in which the first fastening hole and the second fastening hole are overlapped when viewed in the axial direction along the axial direction. As a result, the work of fastening the fastening portion can be easily performed. As a result, the man-hours for manufacturing the vehicle drive device can be reduced.

