JP3214220B2 - Drive motor mounting structure for electric vehicles - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drive motor mounting structure for an electric vehicle.

[0002]

2. Description of the Related Art FIG. 3 shows a conventional drive motor mounting structure for an electric vehicle. Reference numeral 1 denotes a motor-equipped room formed in a front portion of a vehicle body. Extending front side member 2
In addition, skeletal members such as a first cross member 3 and a subframe 4 extending in the vehicle width direction at the front and rear portions of the motor mounting room 1 are disposed and reinforced.

[0003] A center member 5 is connected to the first cross member 3 and the sub-frame 4 so as to extend substantially at the center thereof. A drive motor 6 is mounted on the center member 5 to reduce the motor load. The load is distributed to the frame 4.

A known anti-vibration bush type front motor mount 7 and a rear motor mount 8 are disposed on the center member 5, and the drive motor 6 is attached to the front motor mount 7 and the rear motor mount 8. Are supported via mount brackets 9 provided on the front and rear sides of the camera.

A control unit 10 supplies and distributes the voltage of a battery (not shown) to the drive motor 6 and other accessories.
Since the control unit 10 is large, it is mounted in the motor mounting room 1 together with the drive motor 6 as shown.

Since the control unit 10 is large and has a considerable weight as described above, a pair of front and rear members are provided on the front side members 2 and 2 which are front and rear frame members on both sides of the motor mounting room 1. And the control unit 10 is mounted via the mount bracket 12 over the drive members 6 above the drive motor 6.

This similar structure is disclosed, for example, in Japanese Utility Model Application Laid-Open No. 61-15 / 1986.
No. 0622.

[0008]

Since the large control unit 10 is mounted over the pair of front and rear mount members 11, 11 laid between the front side members 2, 2 above the drive motor 6, the drive motor 6 At the time of attachment / detachment, the attachment / detachment work of the control unit 10 is additionally required, and the workability is deteriorated.

Further, since the first cross member 3 and the long center member 5 which straddles the sub-frame 4 are required for mounting the drive motor 6, the weight is increased and the required weight of the vehicle body is reduced. Not only do
It is disadvantageous in terms of cost.

Further, the drive motor 6 is provided in consideration of the sound vibration performance of the vehicle body.
It is desirable that the front and rear sides of the drive motor 6 be supported on a line passing through the center of gravity of the motor which substantially overlaps the center of the motor, but the front motor mount 7 and the rear motor mount 8 are erected on the center member 5 as described above. If the support is connected and supported via these mount brackets 9, it is necessary to secure the minimum ground clearance of the center member 5.
The height of the front motor mount 7 must be reduced to reduce the height of the front mounting ground of the drive motor 6 for the reason of modeling the front part of the vehicle body. It is undeniable that the connection point, that is, the front support point of the drive motor 6 is shifted to a position lower than the center of gravity, and the sound vibration performance of the vehicle body is deteriorated.

SUMMARY OF THE INVENTION The present invention provides a drive motor mounting structure for an electric vehicle that can improve the workability of attaching and detaching the drive motor, reduce the weight of the vehicle body and improve the sound and vibration performance.

[0012]

According to the present invention, a drive motor and a battery voltage are supplied to the drive motor across a side member extending in the front-rear direction on both sides of a motor mounting room of the vehicle body. A pair of front and rear mount members for supporting a control unit for power distribution are installed, and the control unit is mounted across the pair of front and rear mount members. Drive motor
The drive motor is mounted on both front and rear sides
While the motor mount is fixed to
Attach the mounting bracket downward to the member.
Front and rear motor mount and front and rear mount bracket
Are connected by a support shaft, and the drive motor is
The front and rear motor
Point of connection between the mount and the front and rear mount members by the support shaft
Is set on a line passing through the center of gravity of the motor.

[0013]

[0014]

According to the first aspect, the control unit and the drive motor can be assembled to the pair of front and rear mount members in a vertical positional relationship. Without this, workability is significantly improved.

Further, since a center member for mounting the drive motor is not required, it is advantageous in terms of weight and cost.

Furthermore, since the support point of the drive motor to the mount member is set on a line passing through the center of gravity of the motor at the front and rear sides of the drive motor, the sound vibration performance of the vehicle body can be improved.

Further, since the sound vibration performance of the vehicle body can be improved, the size and weight of the vibration isolating support means used for mounting the drive motor can be reduced, which is advantageous in terms of weight and cost.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the accompanying drawings, in which the same reference numerals are given to the same parts as in the above-mentioned conventional structure.

In FIGS. 1 and 2, the drive motor 6 has a battery.
A pair of mount members 11 before and after mounting the control unit 10 for supplying and distributing the re-voltage have brackets 20 fixed to both ends, respectively, so that both side portions of the motor mounting room 1, specifically, the side walls of the motor mounting room 1, are mounted. The bracket 20 is superimposed on the lower surface of a bracket 21 fixed to the side wall of the front side member 2 joined to a hood ledge panel (not shown) to be detachably mounted with bolts and nuts 22 to mount the control unit 10 on the ground. The height is made as low as possible.

The control unit 10 has a bracket 23 projecting from the front and rear portions of the lower edge on both sides thereof, mounted on the mount bracket 12 fixed to the mount members 11, 11 and detachably mounted with bolts and nuts 24. It is attached to.

A bifurcated mounting bracket 25 is fixed downward at the center of the mounting members 11, 11, and the drive motor 6 is mounted on these mounting brackets 25, 25.

The drive motor 6 has mount sheet portions 26 formed on both front and rear sides.
Motor mounts 27 are fixed to bolts 28 at 26 and 26, respectively.

The motor mount 27 includes an outer cylinder 27a and an inner cylinder 2
7b, a vibration-isolating bush type in which a vibration-isolating rubber 27c is interposed, and each motor mount 27 is disposed between two forks of the mount brackets 25, 25 of the mount members 11, 11, and is attached and detached by a support shaft 29. It is freely connected and installed.

In this embodiment, the motor mount 27,
27, the drive motor 6 which is the position of the center of gravity of the drive motor 6
Projecting on a line P passing substantially through the center of the mounting bracket 25, so that the connection point of the drive motor 6 by the support shaft 29 of the mount brackets 25, 25, that is, the support point of the drive motor 6 just exists on this line P. It is arranged.

According to the structure of the above embodiment, the control unit 10 and the drive motor 6 are connected to the mount member 1.
Since the drive motor 6 is attached to and detached from the control unit 10 via a mounting bracket 12, 25, the control unit 10 is mounted on the control unit 10 via a slinger or an eye bolt (not shown). The unit 10 and the drive motor 6 may be integrally hung by a hoist or the like, and the mount members 11 may be detached from the front side member 2. Therefore, workability can be remarkably improved.

In addition, since a center member for mounting the drive motor 6 is not required as in the prior art, the weight of the vehicle body can be reduced and the cost can be reduced.

The position of the drive motor 6 at the support points on the front and rear sides of the mount member 11, that is, the connection points between the mount brackets 25, 25 and the motor mounts 27, 27 are restricted by the center member. Since it is set on the line P passing through the center of gravity of the motor which is the most preferable in terms of sound vibration, the sound vibration performance of the vehicle body can be significantly improved.

On the other hand, the motor mount 27 can improve the sound vibration performance of the vehicle body by the setting of the support point of the drive motor 6, so that it is not necessary to secure the vibration proof performance by increasing the size, and the motor mount 27 can be reduced in size and weight. Can be achieved, which can further contribute to cost reduction.

In the above embodiment, the control unit and the drive motor are mounted on the front side of the vehicle body by setting the motor mounting room. However, the motor mounting room is set on the rear side of the vehicle body, and the same as described above. Alternatively, the control unit and the drive motor may be integrally mounted in a vertical positional relationship.

[0030]

According to the present invention, the following effects can be obtained.

(1) Since the control unit and the drive motor are mounted on a pair of front and rear mount members in a vertical positional relationship, when the drive motor is attached to or detached from the vehicle body, these mount members are connected to the side members on the side of the motor mounting room. Therefore, it is not necessary to attach and detach the control unit when attaching and detaching the drive motor, so that the workability can be remarkably improved.

(2) The installation of the drive motor eliminates the need for a long center member, which has been indispensable in the past, which is advantageous in terms of weight and cost.

(3) The support point of the drive motor to the mount member is set on a line passing through the center of gravity of the motor at the front and rear sides of the drive motor, which is most preferable for sound vibration without being restricted by the center member. Therefore, the sound and vibration performance of the vehicle body can be improved, and the sense of quality and reliability can be improved.

(4) The sound-vibration performance can be improved by setting the support point of the drive motor. Therefore, it is not necessary to secure the vibration-proof performance by increasing the size of the drive motor as a vibration-proof support means, and the size and weight of the drive motor can be reduced. This makes it possible to increase the degree of freedom of layout in the motor-equipped room, and is more advantageous in terms of weight and cost.

[Brief description of the drawings]

FIG. 1 is a schematic side view showing one embodiment of the present invention.

FIG. 2 is a schematic plan view of the embodiment.

FIG. 3 is a schematic side view showing a conventional structure.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 motor mounting room 2 side member 6 drive motor 10 control unit 11 mount member

Continuation of the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B60K 1/00-1/04 B60K 9/00 B60L 11/00

Claims (1)

(57) [Claims] 1. A pair of front and rear mounts for supporting a drive motor and a control unit for supplying and distributing a battery voltage to the drive motor over a side member extending in the front-rear direction on both sides of a motor mounting room of a vehicle body. erection members, with mounting the control unit across these front and rear mounting members, a structure attached to the drive motor over the front and rear mounting members under side of the control unit, the drive motor
Secures the motor mount on the front and rear sides,
Mount bracket below the pair of rear mount members
The front and rear motor mounts and front and rear
The drive mode is connected to the
Are mounted on a pair of front and rear mounting members.
The support between the rear motor mount and the front and rear mount members
Make sure that the connection point by the axis is set on a line that passes through the center of gravity of the motor.
And a drive motor mounting structure for an electric vehicle.