EP-4741191-A1 - SUPPORT STRUCTURE OF DRIVING DEVICE

EP4741191A1EP 4741191 A1EP4741191 A1EP 4741191A1EP-4741191-A1

Abstract

[Problem to be Solved] To provide a support structure of a driving device (5) that can protect a liquid coolant introduction pipe (23) and a liquid coolant discharge pipe (24) that are provided at a front wall (21A) of a case (8) from collision during a rear-end collision of a vehicle (1). [Solution] In the support structure of the driving device (5), a mount bracket (12) that connects the front wall (21A) of a case body portion (21) and a cross member (3) has an annular portion (12B) in which a cylindrical mount bush (11) that is connected to the front wall (21A) of the case body portion (21) is accommodated, a member attaching portion (12A) that is connected to the cross member (3), and a connection portion (12C) that inclines forward as it progresses upward from the annular portion (12B), and connects the annular portion (12B) and the member attaching portion (12A). The coolant introduction pipe (23) and the coolant discharge pipe (24) are positioned more rearward than a front end portion (12a) of the connection portion (12C) and bend and extend in a vehicle width direction from the front wall (21A) of the case body portion (21) to face the connection portion (12C) in the vehicle width direction.

Inventors

HAYASHI, Tsubasa
MISHIMA, JUN
SUZUKI, JUMPEI
KITAGAWA, TOMOYA

Assignees

Suzuki Motor Corporation

Dates

Publication Date: 20260513
Application Date: 20250912

Claims (3)

A support structure of a driving device, the support structure comprising: a driving device (5) that has 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 electric rotating machine and the electric power control device (6), a liquid coolant introduction pipe (23) which is connected to a front wall (21A) 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 (21A) of the case (8) and from which a coolant that cools the electric power control device (6) is discharged, the driving device (5) being disposed at a rear portion of a vehicle (1); 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 (21A) of the case (8) and the cross member (3), the support structure being characterized in that the mount bracket (12) has an accommodation portion (12B) in which a mount bush (11) that is connected to the front wall (21A) of the case (8) is accommodated, a member attaching portion (12A) that is connected to the cross member (3), and a connection portion (12C) that inclines forward as the connection portion (12C) progresses upward from the accommodation portion (12B) and connects the accommodation portion (12B) and the member attaching portion (12A), and the liquid coolant introduction pipe (23) and the liquid coolant discharge pipe (24) are positioned more rearward than a front end portion (12a) of the connection portion (12C) and bend and extend in the vehicle width direction from the front wall (21A) of the case (8) to face the connection portion (12C) in the vehicle width direction.
The support structure of a driving device as claimed in claim 1, wherein the liquid coolant introduction pipe (23) and the liquid coolant discharge pipe (24) are disposed more rearward than a front end portion (12b) of the accommodation portion (12B).
The support structure of a driving device as claimed in claim 1 or claim 2, wherein the case (8) has a case body portion (21) having the front wall (21A), and a lid portion (22) that is attached to an upper end portion of the case body portion (21) and is provided with a front side flange portion (22F) at least at a front end portion, the front side flange portion (22F) has a pair of bolt fastening portions (22c, 22d) that are fastened to the case body portion (21) by bolts (13A), the pair of bolt fastening portions (22c, 22d) have bulged portions (22f, 22g) that bulge forward from the front side flange portion (22F) respectively, and when the driving device (5) is seen from above, the connection portion (12C) is disposed to be sandwiched by the bulged portions (22f, 22g) in the vehicle width direction.

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, a plurality of gears, and a differential device are accommodated 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, an annular portion that is connected to a front surface of the driving force transmission device, and a portion that extends upward from the annular portion in the vertical direction and is connected to the flange portion. [Citation List] [Patent Literature] [Patent Literature 1] JP2017-100618A [Summary of Invention] [Technical Problem] Incidentally, in a 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, there is a risk that the pipes will collide with a vehicle body member positioned more forward than the driving force transmission device by the driving force transmission device that moves forward during a rear-end collision of the vehicle. 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 that can protect a liquid coolant introduction pipe and a liquid coolant discharge pipe that are provided at a front wall of a case from collision during a rear-end collision of a vehicle. [Solution to Problem] The present invention provides a support structure of a driving device, the support structure including: a driving device that has 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 electric rotating 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, the driving device being disposed at a rear portion of a vehicle; 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 accommodation portion in which a mount bush that is connected to the front wall of the case is accommodated, a member attaching portion that is connected to the cross member, and a connection portion that inclines forward as the connection portion progresses upward from the accommodation portion and connects the accommodation portion and the member attaching portion, and the liquid coolant introduction pipe and the liquid coolant discharge pipe are positioned more rearward than a front end portion of the connection portion and bend and extend in the vehicle width direction from the front wall of the case to face the connection portion in the vehicle width direction. [Advantageous Effect of Invention] As above, according to the present invention described above, it is possible to protect the liquid coolant introduction pipe and the liquid coolant discharge pipe that are provided at the front wall of the case from collision during a rear-end collision of the vehicle. [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.[Figure 5] Figure 5 is a view showing the support structure of the driving device according to one embodiment of the present invention, which is a top view of the driving device.[Figure 6] Figure 6 is a perspective view of a front side bracket of the support structure of a driving device according to one embodiment of the present invention. [Description of Embodiment] A support structure of a driving device according to one embodiment of the present invention is a support structure of a driving device, the support structure including: a driving device that has a rotating electric machine, an electric power co