JPH08324261A - Vehicle power plant support structure - Google Patents

Abstract

(57) [Summary] [Purpose] The structure is simple and the strength of each part can be easily set without causing any problems in the support of the power plant. Allow the backward movement of the plant. [Structure] The bracket 1 for supporting the power plant 6 is
Both end portions 10, 10 which are arranged at regular intervals in the vehicle width direction and are attached to the fixing members 40, 40 of the vehicle body, and the center portion in the longitudinal direction of the bracket 1 between the both end portions 10, 10 are the above. The both ends 10, 10, a rising portion 11 formed so as to rise above the both ends 10, the power plant 6 is arranged inside the rising portion 11 of the bracket 1, the bracket 1
It is hung and supported on the upper part of the rising portion 11 of.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for supporting a power plant for vehicles such as an engine and a mission,
More specifically, the present invention relates to a support structure for a power plant for a vehicle, which can exert a shock absorbing function for a shock generated when a front load (external force) of the vehicle is applied.

[0002]

2. Description of the Related Art Hitherto, as an example of a supporting means for a vehicle power plant, a means disclosed in Japanese Patent Laid-Open No. 1-186429 has been proposed. That is, as shown in FIGS. 6 (a) and 6 (b) of the present application, this conventional means installs a bracket 1e between a pair of left and right front frames 9 and a power plant such as an engine is mounted on the bracket 1e. It is a structure in which 6 is mounted. The two ends of the bracket 1e and the front frames 9 are connected to each other by using bolts 2a, for example.
The connection by a is performed by applying a load F of a predetermined value or more
When 1 (external force) acts, as shown in FIG. 7, the connection is released. Therefore, when the front load of the vehicle is applied, the power plant 6 can be escaped rearward by the external force, and the cushioning effect is obtained.

Further, in the means disclosed in the above publication, an inclined portion 90 in which the front frame 9 is inclined is provided behind the mounting position of the power plant 6. Therefore, when the power plant 6 moves rearward when the front load of the vehicle is applied, the power plant 6 is moved to the inclined portion 9
It can be guided downward by 0.

[0004]

However, the above-mentioned conventional means is the bracket 1 for supporting the power plant 6.
Since the bracket 1e is detached from the front frames 9 and 9 when the front load of the vehicle is applied, the coupling strength between the e and the front frames 9 and 9 by the bolts 2a is set to a constant strength. It has been very difficult to set the bond strength using the bolt 2a. That is, in order to properly support the power plant 6 which is heavy and vibrates, the joining strength between the bracket 1e and the front frames 9, 9 in the vertical direction must be increased, but on the other hand, the vehicle is In order to exert a cushioning function when the front load is applied, the joint strength in the vehicle body front-rear direction must be reduced so that the bracket 1 can be easily disengaged from the front frames 9, 9.

Therefore, conventionally, it has not been easy to appropriately satisfy such a condition of the joint strength in the joint portion using the bolt 2a. Conventionally, for example, if the tightening torque of the bolt 2a is larger than a predetermined torque, it may be difficult to separate the bracket 1e from the front frame 9 under a desired load application condition.

Further, in the above-mentioned conventional means, since the power plant 6 is guided downward by the inclined portions 90 of the front frames 9, 9, it is necessary to provide the inclined portions 90 on the front frames 9, 9. There is. Therefore, in addition to being restricted by the shapes of the front frames 9 and 9, the arrangement of the devices provided in the periphery thereof is also greatly restricted.

In the past, unlike the above, for example, a buckling deformation portion is provided in a part of a bracket that supports the power plant so that the bracket is positively buckled and deformed when a forward load is applied to the vehicle. A means for retracting the power plant has also been proposed. However, with such a means, only a part of the bracket is buckled and deformed, which makes it difficult to make a large backward stroke of the power plant. Also, while securing the strength in the vertical direction for supporting the power plant, it is also possible to set the supporting strength in the vehicle front-rear direction to a desired small strength so that the power plant can retract when the front load of the vehicle acts. After all it was difficult.

The present invention has been devised under such circumstances, and has a simple structure and easy strength setting of each part without causing a problem in supporting the power plant. It is an object of the present invention to enable the backward movement operation of the power plant when the front load of the vehicle is applied by the structure that can be performed at any time.

[0009]

In order to solve the above problems, the present invention takes the following technical means.

That is, the invention according to claim 1 of the present application is a support structure for a vehicle power plant in which a bracket is attached to a fixing member at a front portion of a vehicle body, and the power plant is supported by the bracket. , The brackets are arranged at regular intervals in the vehicle width direction and are attached to the fixing member of the vehicle body at both end portions, and between the both end portions, the central portion in the longitudinal direction of the bracket is longer than the both end portions. The power plant is provided so as to rise upward, and the power plant is disposed inside the rising portion of the bracket and is suspended and supported on the upper portion of the rising portion of the bracket. It is characterized by that.

According to a second aspect of the present invention, in the vehicle power plant support structure according to the first aspect, the two ends of the bracket are bolted to the fixing member of the vehicle body. Of the plurality of bolt insertion holes, and among the plurality of bolt insertion holes, the bolt insertion hole located on the front side of the vehicle body has openings that open to the outer end surfaces of both ends of the bracket. It is characterized in that it is formed as a notch hole having.

[0012]

According to the invention described in claim 1, both ends of the bracket are attached to the fixing member of the vehicle body, while the power plant rises above the both ends of the bracket. It is mounted on the upper part of the section, and the mounting point of the power plant with respect to the bracket is offset so as to be located above the mounting point of the bracket with respect to the vehicle body. Therefore, when the front load (external force) of the vehicle is applied, and when the external force is input to the power plant, this external force can be exerted as a force that tilts the rising portion of the bracket rearward, and the rising portion of the bracket is rearward. The power plant can be moved backward by falling down. As a result, it is possible to exert a cushioning effect when the vehicle is loaded forward.

According to the means for moving the power plant backward by tilting the rising portion of the bracket rearward as described above, both ends of the bracket may be securely fixed to the fixing member of the vehicle body. Therefore, unlike the conventional means, it is not necessary to adjust the coupling strength of the bolt for mounting the bracket to the vehicle body to a desired strength, and the bracket can be easily mounted to the fixing member of the vehicle body. it can.

Further, since the bracket has a so-called gate-like or mountain-like form in which a rising portion is formed in the central portion thereof, the strength of the bracket in the vehicle front-rear direction is made relatively small. Even if the rising portion of the bracket is formed so as to easily fall rearward when the front load of the vehicle is applied, the strength in the vertical direction can be increased due to the characteristic of the shape of the bracket. Therefore, it is possible to easily design and manufacture the bracket for exhibiting the cushioning effect when the forward load is applied to the vehicle without causing a problem in the support of the power plant in the normal time.

Further, in the above power plant, since the rising portion of the bracket tilts backward so as to rotate rearward about the attachment points of both ends of the bracket, the bracket moves backward so that the bracket is attached to the fixing member. By increasing the offset amount (height dimensional difference) between the point and the mounting point of the power plant with respect to this bracket, it is possible to increase the backward movement stroke of the power plant. Therefore, it is easy to increase the backward movement amount of the power plant, and the buffer function can be improved.

Moreover, even when the backward movement amount of the power plant is large, the backward movement of the power plant is the same as that of rotating around the attachment points at both ends of the bracket. Will be done. Therefore, it is possible to appropriately avoid or suppress the fear that the power plant may move backward without restriction. Unlike in the past, as a means for preventing unrestricted backward movement of the power plant, it is not necessary to purposely provide an inclined portion on the body frame, so that the shape of the body frame and the arrangement of vehicle equipment are largely restricted. There is also the advantage that you can avoid receiving it.

Further, since the power plant is arranged and supported inside the rising portion formed on the bracket, the power plant can be mounted by effectively utilizing the space space inside the bracket, and space efficiency can be improved. Can be good. Further, since the power plant is suspended and supported by the bracket, it is possible to properly support the power plant at a very small number of connection points, such as one supporting connection point of the power plant. . That is, when mounting the power plant on the upper surface of the bracket, it is difficult to support the power plant at, for example, only one connecting point, but if the power plant is hung, the It is also possible to properly support the power plant at the connection points only at the points. Therefore, there is also an advantage that the connecting structure of the power plant to the bracket can be made simple.

According to the second aspect of the invention, among the plurality of bolt insertion holes for bolting provided at both ends of the bracket, the bolt insertion hole located on the front side of the vehicle body is the bracket insertion hole. Since the notch holes are formed in the outer surfaces of both ends, the notch hole is formed when the entire bracket is pressed backward when the vehicle is subjected to a front load to cause bending deformation in the central part of the bracket. Both ends of the bracket can be rotated so that the bolt inserted in the bolt insertion hole is removed from the bolt insertion hole formed as. Therefore, such rotation of both ends of the bracket makes it possible to further increase the bending deformation amount and the backward movement amount of the central portion of the bracket, and increase the backward movement amount of the power plant. As a result, the buffering function can be further improved. Since the bolt insertion hole on the rear side of the vehicle body is not formed as a notch hole, it is possible to prevent or suppress the problem that the entire bracket is completely separated from a predetermined fixing member of the vehicle body.

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The preferred embodiments of the present invention will be described below.
A specific description will be given with reference to the drawings.

FIG. 1 is a front sectional view showing an example of a support structure for a vehicle power plant to which the present invention is applied.
2 is a side view of FIG. 1, and FIG. 3 is a bottom view of FIG. In these figures, the arrow a1 direction is the front of the vehicle body, and the arrow a2 direction is the vehicle width direction.

In FIG. 1, this vehicle power plant support structure is applied to a so-called semi-cabover type automobile, and is a floor tunnel 3 formed in the center of the front portion of the automobile body in the vehicle width direction. Inside, the bracket 1 having a mountain-like shape in front view is arranged and attached, and then the bracket 1 is made to support a mission 6 as an example of a power plant.

The bracket 1 is formed by pressing a metal plate, for example.
Both ends 10, 10 for attaching the vehicle to a desired portion of the vehicle body
And a rising portion 11 formed such that the central portion of the bracket 1 in the longitudinal direction is formed between the both end portions 10, 10 so as to rise above the both end portions 10, 10.
And have.

As shown in FIG. 3, each of both ends 10, 10 of the bracket 1 is provided with two bolt insertion holes 12, 12a for inserting the bolts 2, respectively. Of these, the bolt insertion hole 12a on the rear side of the vehicle body is formed like a through hole like a general bolt insertion hole, whereas the bolt insertion hole 12 on the front side of the vehicle body is formed in the bracket. Outer surface 10 of each end 10 of 1
It is formed in a notched hole shape having an opening 13 that opens to the a side. The opening 13 is for allowing the bolt 2 inserted in the bolt insertion hole 12 to be detached from the bolt insertion hole 12 when a forward load (external force) of the vehicle is applied, as described later. is there. This bracket 1
As shown in FIG. 1, the both end portions 10 and 10 are bolted to the reinforcements 40 and 40 fixed to the floor panel 4 constituting the floor tunnel 3 with bolts 2 and are spaced at regular intervals in the vehicle width direction. Installed.

The rising portion 11 of the bracket 1 is
A pair of left and right standing portions 1 standing up from the both end portions 10, 10.
1a and 11a, and a horizontal upper piece portion 11b that connects the upper ends of the pair of standing portions 11a and 11a to each other. In order to effectively use the space space in the floor tunnel 3, it is preferable that the shape of the rising portion 11 matches the tunnel shape of the floor tunnel 3 as much as possible. However, in the present invention, the specific shape of the rising portion 11 is not limited to this. For example, the upright portions 11a and 11a may be upright along the vertical direction to form the bracket 1 as a whole in a gate shape. Alternatively, the standing portion 11a and the upper piece portion 11b may not be distinguished from each other, and the entire rising portion 11a may be formed in a smoothly curved shape, and the rising portion 11 may be entirely formed in an arch shape.

The rising portions 11a, 1 of the rising portion 11
A pair of left and right bracket pieces 5 and 5 are fixedly attached to the upper portion of 1a. These bracket pieces 5,5
Is for supporting the upper part of the mission 6.
Specifically, the shaft body 50 supported by the bracket pieces 5 and 5 is inserted into a mount rubber (rubber bush) 7 attached to the mission 6 so that the mission 6 is raised by the rising portion 11 of the bracket 1. It is placed inside and is suspended and supported.

Further, in the above bracket 1, FIG.
As shown in FIG. 7, a concave portion 14 is provided on the front side of the central portion in the longitudinal direction of the upper piece portion 11b, and the width W of the central portion of the upper piece portion 11b becomes narrower than the width W1 of the other portion. ing. This is useful for facilitating rearward bending deformation of the central portion of the rising portion 11 of the bracket 1 when a front load is applied to the vehicle, as will be described later.

Next, the operation of the support structure for the vehicle power plant will be described.

First, in the above support structure, since the bracket 1 for supporting the mission 6 is bent and formed in a mountain shape having a rising portion 11 at the center thereof, the thickness of each portion of the bracket 1 is reduced, Even if the overall weight is reduced, the strength in the vertical direction can be increased due to the characteristics of the overall shape of the bracket 1. Therefore, stable support of the mission 6 is possible. Further, since the mission 6 is arranged inside the rising portion 11 of the bracket 1 arranged in the tunnel portion 3, the mission 6 can be mounted by effectively utilizing the space in the tunnel portion 3 of the vehicle body. It can be done and the space efficiency is good. Further, the mission 6 is in the form of being suspended and supported via the rubber bush 7 above it, and the mission 6 can be fixed by using only one rubber bush 7, for example. Therefore, it is possible to simplify the mounting support structure of the mission 6 and reduce the number of parts required for mounting the mission 6.

Next, in the above support structure, when the load (external force) F is input to the mission 6 as shown in FIG.
The rising portion 11 of the bracket 1 supporting the can be deformed so as to fall rearward by the external force F, and the mission 6 can be retracted. Therefore, the backward movement of the mission 6 can alleviate the external force F. In the bracket 1 which is entirely bent and formed in a mountain shape, it is possible to set the strength in the front-rear direction of the vehicle body to be small while sufficiently securing the supporting strength in the up-down direction. The setting for deforming the rising portion 11 of the bracket 1 so as to tilt backward by a constant input is easy.

The retreat operation of the mission 6 can be performed by rotating the rising portion 11 of the bracket 1 rearward about the fixing position of the both ends 10, 10 of the bracket 1 by the bolt 2. Therefore,
Height H from the fixed position of both ends 10, 10 of the bracket 1 to the attachment point of the mission 6 to the bracket 1
By increasing (see FIG. 2), it is possible to increase the backward movement amount of the mission 6. Particularly, the upper piece 11 of the rising portion 11 of the bracket 1
A concave portion 14 is provided in the central portion of b, and as shown in FIG. 5, since the central portion of the rising portion 11 is easily deformed rearward, the retreat of the mission 6 attached to this central portion. The amount of movement can be further increased.

Further, as shown in the figure, when the central portion of the bracket 1 is deformed so as to recede, the both end portions 10, 10 of the bracket 1 are accompanied by these deformations.
The bracket 2 is rotated by being dragged by the central portion of the bracket 1 so that the bolt 2 is disengaged from the notch-shaped bolt insertion hole 12 provided in each of the Nos. Therefore, due to the rotational displacement of both ends 10 of the bracket 1, the bracket 1
It is possible to promote the rearward deformation of the central part of the transmission, and to further increase the backward movement amount of the mission 6. As a result, such a backward movement of the mission 6 can improve the cushioning function.

On the other hand, both ends 10, 1 of the bracket 1 are
No. 0 is fixed to the reinforcements 40, 40 by the bolts 2 inserted into the bolt insertion holes 12a on the rear side of the vehicle body, and the bracket 1 as a whole does not come off from the reinforcements 40, 40. Prevented or suppressed as much as possible. Further, as described with reference to FIG. 4, if the rising portion 11 rotates rearward while the both ends 10, 10 of the bracket 1 are fixed at predetermined positions, the backward movement amount of the mission 6 has a certain limit. Occurs. Therefore, it is possible to prevent or suppress the mission 6 from retracting without restriction. As a result, it is not necessary to separately take special means for preventing the unrestricted backward movement of the mission 6, and the overall structure can be simplified.

In the above embodiment, the floor tunnel 3
Reinforcement 40 on floor panel 4
Although the case where the bracket 1 is attached to the above is described as an example, the present invention is not limited to this. In the present invention, the bracket 1 does not have to be arranged in the floor tunnel 3. For example, the bracket 1 may be attached to front side members provided at two positions on the left and right of the front portion of the vehicle body. The point is that both ends 10, 10 of the bracket 1 may be attached to the fixing member of the vehicle body so as to be arranged at regular intervals in the vehicle width direction.

In the above embodiment, the mission 6 is described as an example of a power plant, but the specific example of the power plant to be supported is not limited to this. Any device can be a support target in the present invention as long as it is a device that serves as a vehicle drive device.

In addition, in the present invention, the specific configuration of each part of the bracket, the specific suspension support structure of the power plant with respect to the bracket, and the like are not limited to those in the above embodiment, and the specific configuration of each part. Can be designed in various ways.

[Brief description of drawings]

FIG. 1 is a front sectional view showing an example of a support structure for a vehicle power plant according to the present invention.

FIG. 2 is a cross-sectional view taken along the line XX of FIG.

FIG. 3 is a bottom view of FIG.

FIG. 4 is a side sectional view showing an operating state of the vehicle power plant support structure shown in FIG. 1 when a front load is applied.

5 is a bottom view of FIG.

FIG. 6A is a side view of essential parts showing an example of a conventional vehicle power plant support structure, and FIG. 6B is a front view thereof.

7 is a side view of essential parts showing an operating state of the conventional vehicle power plant support structure shown in FIG. 6 when a front load is applied.

[Explanation of symbols]

 1 bracket 2 bolt 6 mission (power plant) 10,10 both ends (of bracket) 11 rising part (of bracket) 12,12a bolt insertion hole 40 reinforcement (fixing member)

Claims (2)

[Claims] 1. A support structure for a power plant for a vehicle, wherein a bracket is attached to a fixing member of a front portion of a vehicle body, and the power plant is supported by the bracket, wherein the bracket has a constant interval in a vehicle width direction. And both end portions which are arranged apart from each other and are attached to the fixing member of the vehicle body, and a rising portion formed such that a central portion in the longitudinal direction of the bracket rises above the both end portions between the both end portions. With the above, the power plant is arranged inside the rising portion of the bracket, and is suspended and supported on the upper portion of the rising portion of the bracket,
Support structure for vehicle power plant. 2. A plurality of bolt insertion holes for bolting to a fixing member of the vehicle body are provided at both ends of the bracket, and the vehicle body among the plurality of bolt insertion holes is formed. The bolt insertion hole located on the front side is characterized in that it is formed as a notch hole that opens to the outer surface of the end portion of the bracket.
The support structure for a vehicle power plant according to claim 1.