JPH0747844A - Car powertrain support structure - Google Patents

Abstract

PURPOSE:To provide a structure wherein weight reduction can be attained by improving shock absorbing ability against a load from the front, in the structure for supporting a power train. CONSTITUTION:A parameter frame 3, connecting the rear end to the rear part of a front side frame 1, has the first/second/third member parts 31, 32, 33, and a front end 33A of the third member part is integrally connected, to form almost V shape, to a front cross member 2 of connecting the both ends to front ends 1A of the front side frame. A rear mount member 5 for supporting the rear part of a power train 4 is provided in the second member part, and a front mount member 6 for supporting the front part of the power train is provided in the third member part. A suspension lower arm 7 is connected to be supported to front/rear mount members 8, 9 provided in an upper surface of the first member part.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a powertrain support structure including an engine and a transmission, and more particularly to an automobile powertrain support structure suitable for a powertrain in which an engine and a transmission are arranged side by side.

[0002]

2. Description of the Related Art Conventionally, as one of means for supporting a power train including an engine and a transmission in a front portion of a vehicle, the vehicle is disposed below a pair of front side frames extending in the vehicle front-rear direction on both sides of the vehicle body. Providing a perimeter frame extending in the front-back direction,
It is known that the perimeter frame supports a power train and a suspension arm. In an automobile equipped with this perimeter frame, an engine mount is mounted on the perimeter frame to attach the engine, and one end of the suspension arm is attached and integrated to the main frame during the engine assembling process to assemble the engine as it is. The attaching work can be simplified. In addition, by bending the perimeter frame downward, when the engine retracts due to the impact at the time of a head-on collision, the perimeter frame can be deformed to move the engine downward, suppressing the impact on the vehicle interior. It is possible.

[0003]

However, in the conventional power train support structure including the perimeter frame of the automobile, there is a problem that the weight is significantly increased. Also, in the case of a power train in which the engine and the transmission are arranged side by side in the lateral direction, that is, the vehicle width direction,
To ensure the proper length of the suspension arm,
Since the mount part of the suspension arm is located inside, when the load from the front deforms the perimeter frame and the powertrain retracts, the rear end of the transmission and the front end of the suspension arm attached to the perimeter frame. This interferes with the backward movement of the power train, and there is a problem that the crash space is reduced and the shock absorbing effect is reduced. In order to solve this problem, the mounting position of the front end of the suspension arm is separated from the path along which the rear end of the transmission moves when a load is applied from the front, that is, the position displaced from the rear of the transmission to the outer side in the width direction ( For example, there is a means for setting the outer end of the perimeter frame), but in this means, since the outer end of the suspension arm is set as the vehicle end mounting position, the suspension arm becomes short and the displacement amount of the wheel is large. There was a problem of becoming. As an example, as disclosed in JP-A-1-202525, the engine mounts that support the left and right of the engine are rotated about the line in the vehicle width direction when an impact of a predetermined value or more is received. Although it is known, there was a risk that the ability to support the reaction force of the engine would decline.

An object of the present invention is a support structure for a power train in which an engine and a transmission are arranged in a lateral direction, and when a load from the front is received, a space for moving the power train to the lower rear is secured and an impact is provided. An object of the present invention is to provide a powertrain support structure for an automobile, which can improve absorption capacity and promote weight reduction.

[0005]

To achieve the above object, a powertrain support structure for an automobile according to the present invention is a powertrain support structure in which an engine and a transmission are arranged in a lateral direction. In the perimeter frame that mounts the parts and supports the suspension arm, the perimeter frame supports a pair of left and right first member parts that respectively support the left and right suspension arms and extends in the front-rear direction, and a left and right first member part. A second member part having both ends joined to the member part, which mounts the rear part of the power train and extends in the width direction, and a second member part which mounts the front part of the power train and inclines inward from the front end of the first member part, And a third member portion whose front end is joined to the cross member.

[0006]

When the load from the front is received, the perimeter frame is compressed in the front-rear direction, and the angle formed by the left and right third member portions increases, pushing the front portion of the first member portion outward of the vehicle body. As it is unfolded, the mount part of the suspension arm is moved to the outside of the vehicle. Therefore, when the power train moves rearward and downward, the mount part of the suspension arm moves from the path along which the power train, especially the rear part of the transmission, does not interfere with the rear part of the transmission and the front part of the suspension arm.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described with reference to FIGS. In the front part of the vehicle body, a pair of front side frames 1, 1 extending in the front-rear direction on both sides of the vehicle body, and a front cross member 2 having both ends coupled to front ends 1A, 1A of both front side frames 1, 1 extending in the vehicle width direction.
And a perimeter frame 3.

The rear end of the perimeter frame 3 is joined to the rear parts of the front side frames 1 and 1, respectively,
A pair of first member portions 31, 31 extending in the front-rear direction on both sides of the vehicle body
And a second member portion 32 whose both ends are joined to an intermediate position between the left and right first member portions 31, 31 and which extends in the width direction, and a front portion inclining inward from the front ends of the left and right first member portions 31, 31. And a third member portion 33, 33 extending to the front end of the third member portion 33, 33.
33A is integrally joined to form a substantially V-shape, and its front end 33
A is joined to the front cross member 2.

The second member portion 32 is provided with a rear mount member 5 for supporting the rear portion of the power train 4 in which the engine E and the transmission T are laterally arranged, and the third member portion 33 on one side is in front of the power train 4. The front mount member 6 for supporting the parts is provided, and the left and right suspension lower arms 7, 7 are mounted on both the first member parts 31, 31 respectively. The suspension lower arm 7 is 2 from the outer end 71.
A book arm 72 extends inward at a predetermined angle, and a pair of inner ends 73, 74 are coupled and supported by front and rear mount members 8, 9 provided on the upper surface of the first member portion 31. The reference numerals 8 and 9 are arranged in the front and rear with the joint portion of the second member portion 32 interposed therebetween.

With this configuration, the front and rear mount members 8 and 9
Position, that is, the inner end 73 of the suspension lower arm 7,
Since the position of 74 is moved inward from the outer end of the first member portion 31, the length of the suspension lower arm 7 can be increased and the amount of wheel displacement can be reduced. In addition, the weight of the perimeter frame 3 is reduced, and when the perimeter frame 3 receives a load from the front, the rear load concentrates on the front end 33A of the third member portion 33, and the front side frames 1, 1 When the member is deformed, the first member parts 31, 31 and the third member parts 33, 33
And are bent downward to move the power train 4 backward while retreating (see FIG. 3), while the third member portion 33,
The apex angle of the V-shape formed by 33 is expanded, and both third member parts
The distance between the rear ends of the 33, 33 increases, the distance between the front mount members 8, 8 of the left and right suspension lower arms 7, 7 increases (see FIG. 4), and the movement of the power train 4, particularly the transmission T is increased. It does not interfere with the movement of the power train 4 by going outside from the path.

A second embodiment will be described with reference to FIG.
The perimeter frame 30 includes a pair of first first frames extending in the front-rear direction.
Member parts 301, 301 and first member parts 301, 301 on the left and right
A second member portion 302 having both ends joined to the first member portion
301, the third that extends forward from the front end of the 301 by inclining inward
The member parts 303, 303 are provided, and both the third member parts 303, 303 are provided.
The front ends 303A and 303A are joined to the front cross member 2 with a gap therebetween. Second member section 302
The front mount member 6 is provided on the rear mount member 5, the third member portion 303 on one side, and the front and rear mount members 8 and 9 of the suspension lower arm 7 are provided on the first member portion 301. With this configuration, the perimeter frame 30 can be easily manufactured.

A third embodiment will be described with reference to FIG.
By increasing the rigidity of the wheel apron reinforcement 10 by setting the cross-sectional area, material, plate thickness, etc., it has the function of the front side frame, and the wheel apron reinforcement 10 with the base joined to the upper part of the side member 11 is The front end 10A is formed in a short column shape having a tapered shape, curving downward toward the front end, and extending vertically.
A front cross member 2 having both ends joined to the lower ends of the front ends 10A, 10A of the left and right wheel apron reinforcements 10, 10 is provided. The perimeter frame 3 includes first member portions 31 and 31 whose rear ends are joined to the lower ends of the left and right side members 11, and a second member portion 32 whose both ends are joined to an intermediate position between the first member portions 31 and 31. And a third member extending inward from the front ends of the left and right first member portions 31, 31 so as to be inclined inward.
And the front end 33 of the third member portion 33, 33.
A is joined together to form a generally V-shape with its front end 33A
Is fixed to the front cross member 2.

According to this structure, since the front side frame is not required, the weight of the vehicle body can be significantly reduced, and a space can be secured on both sides of the engine E, so that the accessories can be easily installed. Become. In particular, in a front-wheel drive type vehicle equipped with a transverse engine, a large space can be secured beside the engine, so that the steering angle of the front wheels can be made large and the turning radius can be made small. Further, since the wheel apron reinforcement 10 is curved downward toward the front end, when a load is applied from the front, the wheel apron reinforcement 10 bends downward and the front end 10A moves downward, and the perimeter The frame 3 is moved downward to move each mount member downward, and the power train 4 is moved downward. In addition, by providing a weak portion in a proper position of the wheel apron reinforcement 10, the wheel apron reinforcement 10 is likely to bend downward due to the load from the front, and the power train 4 can be surely moved downward. it can.

[0014]

Since the present invention is constructed as described above, it has the following effects. Since the position of the inner end of the suspension lower arm moves more inward than the outer end of the first member portion, the suspension lower arm can be lengthened and the displacement amount of the wheel can be reduced. In addition, the weight of the perimeter frame is reduced, and when the perimeter frame receives a load from the front, the rear load is concentrated on the front end of the third member portion, and when the front side frame is deformed, While the first member portion and the third member portion are bent downward to move the power train backward while retracting the power train,
The apex angle of the V-shape formed by the third member portion is enlarged, the distance between the rear ends of both third member portions is increased, and the distance between the front mounting members of the left and right suspension lower arms is increased. It does not interfere with the movement of the power train by going outside the movement path of the train, especially the transmission.

[Brief description of drawings]

FIG. 1 is a perspective view showing a first embodiment of the present invention.

FIG. 2 is a side view showing the first embodiment of the present invention.

FIG. 3 is a side view for explaining the operation of the first embodiment of the present invention.

FIG. 4 is a plan view for explaining the operation of the first embodiment of the present invention.

FIG. 5 is a plan view showing a second embodiment of the present invention.

FIG. 6 is a perspective view showing a third embodiment of the present invention.

[Explanation of symbols]

1 front side frame, 2 front cross member 3 perimeter frame, 4 lateral members 5, 6 front and rear mounting members, 7.8 left and right mounting members

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kei Mizuno 3-1, Shinchi, Fuchu-cho, Aki-gun, Hiroshima Prefecture Mazda Motor Corporation

Claims (1)

[Claims] 1. A powertrain support structure in which an engine and a transmission are arranged in a lateral direction, the powertrain support structure including a perimeter frame for mounting front and rear portions of the powertrain and supporting a suspension arm, the perimeter frame comprising: A pair of left and right first member portions that support the left and right suspension arms on the upper surface and extend in the front-rear direction, and both ends are joined to the left and right first member portions, and a rear portion of the power train is mounted to extend in the width direction. An automotive vehicle comprising: a member portion; and a third member portion which mounts a front portion of the power train and extends inwardly from a front end of the first member portion, and a front end of which is joined to a front cross member. Powertrain support structure.