EP-4741192-A1 - SUPPORT STRUCTURE OF DRIVING DEVICE

EP4741192A1EP 4741192 A1EP4741192 A1EP 4741192A1EP-4741192-A1

Abstract

[Problem to be Solved] To provide a support structure of a driving device capable of efficiently disposing a connection portion (12C) between a liquid coolant introduction pipe and a liquid coolant discharge pipe, and improving a degree of freedom of disposition of the liquid coolant introduction pipe and the liquid coolant discharge pipe. [Solution] In the support structure of a driving device (5), a mount bracket (12) that connects a front wall (8A) of a driving case (8) and a cross member (3) has an annular portion (12B) in which a cylindrical mount bush (11) that is connected to the driving case (8) is accommodated, a member attaching portion (12A) that is connected to the cross member (3), and a connection portion (12C) that connects the annular portion (12B) and the member attaching portion (12A). The connection portion (12C) is formed so that a dimension (W1) in a vehicle width direction is shorter than a dimension (W2) in the vehicle width direction of the annular portion (12B), and is disposed between the coolant introduction pipe (23) and the coolant discharge pipe (24) in the vehicle width direction.

Inventors

NAKABAYASHI, NOBUO
HATTORI, SOICHIRO
EGUCHI, HIROYUKI
HAYASHI, Tsubasa
MIYATA, KEISUKE
SATO, Tatsuki
IMAI, KYOHEI

Assignees

Suzuki Motor Corporation

Dates

Publication Date: 20260513
Application Date: 20250925

Claims (3)

A support structure of a driving device, the support structure comprising: a driving device (5) having a rotating electric machine, an electric power control device (6) that controls electric power that is supplied to the rotating electric machine, a case (8) that accommodates the rotating electric machine and the electric power control device (6), a liquid coolant introduction pipe (23) which is connected to a front wall (8A) of the case (8) and into which a coolant to cool the electric power control device (6) is introduced, and a liquid coolant discharge pipe (24) which is connected to the front wall (8A) of the case (8) and from which a coolant that cools the electric power control device (6) is discharged; a cross member (3) that is provided in front of the driving device (5) and extends in a vehicle width direction; and a mount bracket (12) that connects the front wall (8A) of the case (8) and the cross member (3), the support structure being characterized in that the mount bracket (12) has an annular portion (12B) in which a cylindrical mount bush (11) that is connected to the case (8) is accommodated, a member attaching portion (12A) that is connected to the cross member (3), and a connection portion (12C) that connects the annular portion (12B) and the member attaching portion (12A), and the connection portion (12C) is formed so that a dimension (W1) in the vehicle width direction is shorter than a dimension (W2) in the vehicle width direction of the annular portion (12B), and is disposed between the liquid coolant introduction pipe (23) and the liquid coolant discharge pipe (24) in the vehicle width direction.
The support structure of a driving device as claimed in claim 1, wherein in the mount bracket (12), the member attaching portion (12A) is positioned more forward than the annular portion (12B).
The support structure of a driving device as claimed in claim 1 or claim 2, wherein the member attaching portion (12A) is disposed more upward than the annular portion (12B), and thereby the driving device (5) is suspended from the cross member (3), a lower surface (3a) of the cross member (3) is formed to be an inclined surface that inclines downward as the lower surface (3a) progresses from a rear side toward a front side, the connection portion (12C) inclines forward as the connection portion (12C) progresses from the annular portion (12B) toward the member attaching portion (12A) above the annular portion (12B), and an upper surface (12a) of the member attaching portion (12A) abuts on the lower surface (3a) of the cross member (3).

Description

[Technical Field] The present invention relates to a support structure of a driving device. [Background Art] There has been conventionally known a support device for a driving force transmission device in which the driving force transmission device that accommodates a motor generator, gears, and a differential device is supported at a cross member via a rear mount bracket (see Patent Literature 1). The rear mount bracket has a flange portion that is connected to the cross member, a portion in an annular shape (hereinafter, referred to as an annular portion) that is connected to a front surface of the driving force transmission device, and a portion (hereinafter, referred to as a connection portion) that extends upward from the annular portion in the vertical direction and is connected to the flange portion. The connection portion is formed so that a dimension in the vehicle width direction becomes gradually larger than the diameter of the annular portion as it progresses upward from the annular portion. [Citation List] [Patent Literature] [Patent Literature 1] JP2017-100618A [Summary of Invention] [Technical Problem] Incidentally, in the driving force transmission device having a motor generator, an electrical device such as an inverter may be cooled with a coolant. For this reason, when pipes for allowing the coolant to flow through the driving force transmission device are provided at the front surface (front wall) of the driving force transmission device, the rear mount bracket becomes obstructive to reduce the degree of freedom of disposition of the pipes. In other words, in the conventional rear mount bracket, since the connection portion is formed so that the dimension in the vehicle width direction becomes gradually larger than the diameter of the annular portion as it progresses upward from the annular portion, the area occupied by the connection portion in the vehicle width direction increases, and the connection portion becomes obstructive to reduce the degree of freedom of disposition of the pipes. The present invention is made in view of the circumstances as described above and has an object to provide a support structure of a driving device capable of efficiently disposing a connection portion between a liquid coolant introduction pipe and a liquid coolant discharge pipe, and improving a degree of freedom of disposition of the liquid coolant introduction pipe and the liquid coolant discharge pipe. [Solution to Problem] The present invention provides a support structure of a driving device, the support structure including: a driving device having a rotating electric machine, an electric power control device that controls electric power that is supplied to the rotating electric machine, a case that accommodates the rotating electric machine and the electric power control device, a liquid coolant introduction pipe which is connected to a front wall of the case and into which a coolant to cool the electric power control device is introduced, and a liquid coolant discharge pipe which is connected to the front wall of the case and from which a coolant that cools the electric power control device is discharged; a cross member that is provided in front of the driving device and extends in a vehicle width direction; and a mount bracket that connects the front wall of the case and the cross member, the support structure being characterized in that the mount bracket has an annular portion in which a cylindrical mount bush that is connected to the case is accommodated, a member attaching portion that is connected to the cross member, and a connection portion that connects the annular portion and the member attaching portion, and the connection portion is formed so that a dimension in the vehicle width direction is shorter than a dimension in the vehicle width direction of the annular portion, and is disposed between the liquid coolant introduction pipe and the liquid coolant discharge pipe in the vehicle width direction. [Advantageous Effect of Invention] As above, according to the present invention described above, it is possible to efficiently dispose the connection portion between the liquid coolant introduction pipe and the liquid coolant discharge pipe and improve the degree of freedom of disposition of the liquid coolant introduction pipe and the liquid coolant discharge pipe. [Brief Description of Drawings] [Figure 1] Figure 1 is a view showing a support structure of a driving device according to one embodiment of the present invention, which is a bottom view of a rear portion of a vehicle.[Figure 2] Figure 2 is a sectional view in a direction of arrows II to II in Figure 1.[Figure 3] Figure 3 is a sectional view in a direction of arrows III to III in Figure 1.[Figure 4] Figure 4 is a view showing the support structure of the driving device according to one embodiment of the present invention, which is a front view of the driving device. [Description of Embodiment] A support structure of a driving d