JPH06115363A - Mount bracket - Google Patents

Abstract

PURPOSE:To prevent generation of torsional moment caused by rotation of a drive motor and a reduction gear on a mount bracket and a supporting member for supporting the mount bracket. CONSTITUTION:A mount bracket 22 is of a lengthy shape with its one end constituting a mount fitting portion 22A and the other end a securing portion 22B to a front cross member 20. The direction of transmitting resultant force of the drive motor 24 torque and the reduction gear 26 torque, which act upon the mount fitting portion 22A of the mount bracket 22, is toward the arrow mark W while the mount bracket 22 is set in the position along the transmitting direction (arrow mark W direction) of the resultant force power of the drive motor 24 torque power and the reduction gear 26 torque power.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mount bracket, and more particularly to a mount bracket that supports a drive motor and a reduction gear of an electric vehicle.

[0002]

2. Description of the Related Art Generally, a drive motor and a reduction gear of an electric vehicle are integrated and attached to a skeletal member such as a front cross member of a vehicle body via a common mount bracket. JP-A-60-14
6724.

As shown in FIG. 5, the mount bracket 70 has an elongated shape, and one end portion 70A is fixed to a front cross member 72. On the other hand, the mount bracket 70 extends obliquely upward and rearward of the vehicle body, and a drive motor 74 and a reduction gear 76 are supported via a mount 78 at the other end 70B.

[0004]

However, in this mount bracket 70, the transmission direction of the rotational force of the drive motor 74 acting on the end portion 70B of the mount bracket 70 is centered on the rotational axis 74A of the drive motor 74. Is a tangential direction along the circle (the direction of arrow N in FIG. 5), and the transmission direction of the rotational force of the reduction gear 76 acting on the end portion 70B of the mount bracket 70 is the rotational axis 76A of the reduction gear 76. It is a tangential direction (direction of arrow R in FIG. 5) along a centered circle.

Therefore, the end portion 7 of the mount bracket 70 is
The transmission direction of the resultant force of the rotational force of the drive motor 74 acting on 0B and the rotational force of the reduction gear 76 (the direction of arrow W in FIG. 5) intersects with the axis 70C of the mount bracket 70.

Therefore, the mount bracket 70 and the end portion 70A of the mount bracket 70 are fixed by the resultant force of the rotational force of the drive motor 74 acting on the end portion 70B of the mount bracket 70 and the rotational force of the reduction gear 76. Torsional moment on the cross member 72 (see FIG.
Arrow M) acts. Therefore, reinforcement is required to improve the rigidity of the cross member 72, which causes a problem that the weight of the vehicle body increases.

In consideration of the above facts, the present invention provides a mounting bracket and a supporting member for supporting the mounting bracket,
An object of the present invention is to obtain a mount bracket that can prevent a torsional moment from being generated due to the rotation of the drive motor and the reduction gear.

[0008]

The present invention according to claim 1 has a mount mounting portion to which a mount for supporting a drive motor and a reduction gear is mounted at one end, which is elongated, and the other end. A mount bracket having a fixing portion to a support member at a portion thereof, characterized in that it is set at a position along a transmission direction of a resultant force of the rotational force of the drive motor and the rotational force of the reduction gear.

[0009]

In the mount bracket of the present invention, when the drive motor and the reduction gear rotate, the resultant force of the rotational force of the drive motor and the rotational force of the reduction gear is provided at one end of the elongated mount bracket. Is input to the mount mounting portion provided and transmitted to the support member from the fixing portion provided at the other end portion. In this case, since the mount bracket is set at a position along the transmission direction of the resultant force of the rotational force of the drive motor and the rotational force of the reduction gear, the resultant force acts in the axial direction of the mount bracket.

Therefore, a torsional moment is not generated in the mount bracket and the supporting member, and it is not necessary to reinforce the mount bracket and the supporting member, so that the weight can be reduced.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the mount bracket of the present invention will be described with reference to FIGS.

In the figure, the arrow FR indicates the front direction of the vehicle body, the arrow IN indicates the vehicle width inner direction, and the arrow UP indicates the vehicle body upward direction.

As shown in FIG. 4, a vehicle body 1 of an electric vehicle.
A pair of front side members 12 are arranged along the front and rear of the vehicle body in the vicinity of the lower portions of both ends of the 0 front portion 10A in the vehicle width direction.

As shown in FIG. 2, the front side member 12 includes a front side member outer 14 which constitutes an outside portion of the front side member 12 in the vehicle width direction, and a front side member which constitutes an inside portion of the front side member 12 in the vehicle width direction. The side member inner 16 and the side member inner 16 have a closed cross-section structure extending in the front-rear direction of the vehicle body.

Gusset front cross member side reinforcements 18 are fixed to the pair of front side members 12 at the positions opposite to each other at the lower front ends thereof. These gusset front cross member side reinforcements 18 have a closed cross-sectional structure bent in a V shape and have a rectangular cross section, and a pair of upwardly extending portions are provided at the respective open end portions of the leg portions 18A and 18B. Vertical flange 18
C and 18D, and a pair of horizontal flanges 18E and 18F extending in the front or rear direction of the vehicle body are formed, respectively.

The vertical flange 18C of the gusset front cross member side reinforcement 18 is welded to the lower part of the vehicle width direction inner side surface 12A of the front side member 12, and the vertical flange 18D of the gusset front cross member side reinforcement 18 is It is welded to the lower portion of the outer side surface 12B of the front side member 12 in the vehicle width direction. In addition, the horizontal flange 18 of the gusset front cross member side reinforcement 18
E and 18F are the lower surface 12C of the front side member 12.
Are welded to each.

The gusset front cross member side reinforcement 18 has a receiving portion 1 at the lower end apex portion 18G.
8H is formed to project inward in the vehicle width direction. The cross-sectional shape of the receiving portion 18H when viewed from the inside in the vehicle width direction is an arc shape with the opening facing upward. 20A is welded.

The front cross member 20 is made of a straight pipe material, and a mount bracket 22 is fixed to the middle portion in the longitudinal direction.

As shown in FIG. 1, the mount bracket 22 has an elongated shape when viewed from the vehicle width direction.
One end is a mount mounting portion 22A. A cylindrical mount 28 that supports the drive motor 24 and the reduction gear 26 is mounted on the mount mounting portion 22A. The other end of the mount bracket 22 is fixed to the front cross member 20 by a fixing portion 22B.
It is said that.

As shown in FIG. 3, the shaft center 24A of the drive motor 24 is substantially parallel to the front cross member 20, and the shaft center 26A of the reduction gear 26 is also substantially parallel to the front cross member 20. There is.

Therefore, as shown in FIG. 1, in the mount bracket 22, the transmission direction of the rotational force of the drive motor 24 acting on the mount mounting portion 22A of the mount bracket 22 is centered on the rotational axis 24A of the drive motor 24. Is a tangential direction along a circle (direction of arrow N in FIG. 1), and the rotational force transmission direction of the reduction gear 26 is the rotational axis of the reduction gear 26 that acts on the mount mounting portion 22A of the mount bracket 22. It is a tangential direction (direction of arrow R in FIG. 1) along a circle centered on 26A.

Therefore, the transmission direction of the resultant force of the rotational force of the drive motor 24 and the rotational force of the reduction gear 26 acting on the mount mounting portion 22A of the mount bracket 22 passes through the region between the arrows N and R. The direction of the arrow W is 1, and the mount bracket 22 is set at a position along the direction of the arrow W.

As shown in FIG. 2, the fixing portion 22B of the mount bracket 22 to the front cross member 20 is
It is curved in an arc shape and is welded to the outer peripheral surface of the front cross member 20. Also, the mounting bracket 22
The mount mounting portion 22A is composed of a pair of parallel pieces extending from both ends in the vehicle width direction of the fixed portion 22B, and the mount 28 inserted between these parallel pieces is mounted by bolts 30 and nuts 32. Has been.

The operation of this embodiment will be described below. In the mount bracket 22 of the present embodiment, when the drive motor 24 and the reduction gear 26 rotate, the resultant force of the rotational force of the drive motor 24 and the rotational force of the reduction gear 26 causes the mounting bracket 22 to be mounted in a long shape. The fixed portion 2 input to the portion 22A and provided on the other end portion
It is transmitted from 2B to the front cross member 20. In this case, since the mount bracket 22 is set at a position along the transmission direction of the resultant force of the rotational force of the drive motor 24 and the rotational force of the reduction gear 26 (direction of arrow W in FIG. 1), The resultant force of the rotational force of the drive motor 24 and the rotational force of the reduction gear 26 acts in the direction of the axis 22C.

Therefore, a torsional moment is not generated in the mount bracket 22 and the front cross member 20, and it is not necessary to reinforce the mount bracket 22 and the front cross member 20, so that the weight can be reduced.

[0026]

The mount bracket of the present invention has an elongated shape and has a mount attachment portion at one end to which a mount for supporting the drive motor and the reduction gear is attached, and the other end portion to the support member. A mount bracket having a fixed portion, which is set at a position along the transmission direction of the resultant force of the rotational force of the drive motor and the rotational force of the reduction gear. And, it has an excellent effect that no torsion moment is generated due to the rotation of the reduction gear.

[Brief description of drawings]

FIG. 1 is a side view showing a mount bracket according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a mount bracket according to an embodiment of the present invention as seen from diagonally above the front of the vehicle body.

FIG. 3 is a perspective view showing a motor and a reduction gear supported by a mount bracket according to an embodiment of the present invention, as viewed from diagonally upper rear of the vehicle body.

FIG. 4 is a perspective view showing a vehicle body to which a mount bracket according to an embodiment of the present invention is applied, as seen from a vehicle body obliquely lower side.

FIG. 5 is a side view showing a mount bracket according to a conventional example.

[Explanation of symbols]

 10 Vehicle Body 20 Front Cross Member (Supporting Member) 22 Mount Bracket 22A Mount Attachment Part 22B Fixed Part 22C Shaft Center 24 Drive Motor 26 Reduction Gear 28 Mount

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tadahiko Fuse Nobunchi, Tauraminato-cho, Yokosuka City, Kanagawa Kanto Automobile Industry Co., Ltd. Within

Claims (1)

[Claims] 1. A mount bracket having a long mount mounting portion to which a mount supporting a drive motor and a reduction gear is mounted, and a fixing portion to a supporting member at the other end. A mount bracket, wherein the mount bracket is set at a position along a transmission direction of a resultant force of the rotational force of the drive motor and the rotational force of the reduction gear.