JPH1045020A - Structure for arranging component of front of automobile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To permit the vibration of an engine to be absorbed sufficiently by an engine mount to ensure that the vibration is not transmitted to the automotive body by enhancing the rigidity of the support of the engine at the coupled frames of a sub-frame, using simple constitution. SOLUTION: A body frame 3 includes a main frame 4 and a sub-frame 5 placed underneath the main frame 4. The sub frame 5 comprises a pair of right and left sub side frames 28, 28 that extend longitudinally and coupled frames 3 projected upward from the sub side frames 28, 28, with their projected ends coupled to the main frame 4. The engine 9 is stretched between the projecting ends of the coupled frames 33 and supported against the projecting ends via an engine mount 10. The engine mount 10 is located near the coupled portions 39 of the projecting ends of the coupled frames 33 to the main frame 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automobile having a main frame in which a body frame supports a body, and a subframe disposed below the main frame and supporting the engine via an elastic engine mount. The present invention relates to a structure for arranging components in the front part.

[0002]

2. Description of the Related Art A conventional structure for disposing components on the front of an automobile is disclosed in Japanese Utility Model Publication No. 2-343828.

[0003] According to this, a body frame that constitutes the body of an automobile includes a main frame that supports the body, and a subframe that is provided below the main frame and supports the engine via an elastic engine mount. Have.
This sub-frame is composed of a pair of left and right sub-side frames extending in the front-rear direction, and a connecting frame that protrudes upward from each of the sub-side frames and whose protruding end is connected to the main frame.

The sub-frame supports a suspension for supporting front wheels, and extends in the vehicle width direction from the engine to the front wheels to transmit power of the engine to the front wheels. Is provided.

The reason why the body frame is composed of the main frame and the subframe is to improve the workability of assembling the front part of the vehicle. Assembling the engine and suspension to the sub-frame in the work space facilitates this work, and thus assembling the sub-frame, engine, and suspension as a unit to the main frame. Which, as described above,
The workability of assembly has been improved.

[0006] Then, the power of the engine is transmitted to the front wheels via the power transmission shaft, whereby the automobile can run on the ground.

Further, the vibration when the engine is driven is absorbed by the engine mount, and the transmission of the vibration to the vehicle body such as the subframe is suppressed.

[0008]

In the prior art, if the rigidity of the support portion of the engine in the sub-frame is low, the vibration of the engine is not sufficiently absorbed by the engine mount, and the engine mount passes through the sub-frame. This is transmitted to the vehicle body, which may cause the vehicle body to vibrate and cause inconvenience such as noise.

Therefore, it is desired to reinforce the sub-frame to improve the rigidity of the engine support portion in this sub-frame. In this case, if a reinforcing material is separately provided, the configuration of the sub-frame becomes complicated. Problem.

On the other hand, in the above-described conventional technique, if the coupling frame and the power transmission shaft are to be located at the same position in the front-rear direction, they may interfere with each other. Therefore, they are arranged side by side in the front-rear direction. However, according to this, there is a disadvantage that the entire length of the vehicle is increased.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described circumstances, and has a simple structure to improve the rigidity of an engine supporting portion in a combined frame of subframes.
Accordingly, it is an object of the present invention to sufficiently absorb the vibration of the engine by the engine mount and to prevent the vibration from being transmitted to the vehicle body more reliably.

It is another object of the present invention to reduce the overall length of an automobile even in the case described above.

[0013]

Means for Solving the Problems The structure for disposing the components at the front part of the vehicle according to the present invention to achieve the above object is as follows.

According to the first aspect of the present invention, there is provided a main frame 4 in which a body frame 3 supports a body, and a sub-frame 5 disposed below the main frame 4 and supporting an engine 9 via an elastic engine mount 10. A pair of left and right sub-side frames 28, 28 extending in the front-rear direction with the sub-frame 5;
In the case of projecting upward from 28 and having a projecting end portion formed by a coupling frame 33 coupled to the main frame 4,

The engine 9 is connected to the two connecting frames 33.
, And each of the projecting ends is supported via the engine mount 10, and the engine mount 10 is connected to the coupling frame 3 with respect to the main frame 4.
3 is located in the vicinity of the joint 39 at the protruding end.

According to a second aspect of the present invention, in addition to the first aspect, a suspension 8 for supporting the front wheels 7 is supported by the sub-frame 5, and a vehicle width is set so as to be directed from the engine 9 to the front wheels 7. A power transmission shaft 20 extending in the direction of FIG. 3 and transmitting the power of the engine 9 to the front wheels 7. The coupling frame 33 has a substantially gate shape in a side view, and a space 44 surrounded by the coupling frame 33 has the power 44. The transmission shaft 20 penetrates.

[0017]

Embodiments of the present invention will be described below with reference to the drawings.

In the figure, reference numeral 1 denotes a car, and an arrow Fr indicates the front in the traveling direction of the car 1, and the left and right described below refer to the vehicle width direction toward the front.

The front portion of the vehicle body 2 of the automobile 1 has a vehicle body frame 3 made of sheet metal. The vehicle body frame 3 is disposed below the main frame 4 and connected to the main frame 4. And the sub-frame 5 to be made.

The main frame 4 supports an unillustrated sheet metal body constituted by an outer plate constituting an outer shell at the front of the vehicle body 2 and a partition plate for partitioning the inside of the body into respective chambers. . On the other hand, the sub-frame 5 supports a suspension 8 that supports a pair of left and right front wheels 7, and an engine (internal combustion engine) 9 that is a driving power source via a pair of left and right engine mounts 10, 10. I support it. The engine 9 is of a so-called vertical type with a crankshaft extending in the front-rear direction. A clutch 12 and a transfer 13 are sequentially connected to the rear of the engine 9, and the engine 9, the clutch 12 and the transfer 13 constitute an integrated power unit 14. The rear of the power unit 14 is connected to the main frame 4.
Are supported by fasteners 15.

A differential device 16 is arranged between the left and right front wheels 7, and the differential device 16 is supported by a plurality (three) of elastic differential mounts 17 at the front of the sub-frame 5. An input section located at the rear of the differential 16 is operatively connected to the transfer 13 via a drive shaft 18. Further, the front wheels 7 are interlockingly connected via power transmission shafts 20 to respective output portions located on the left and right sides of the differential device 16. Each of the power transmission shafts 20 extends in the vehicle width direction from the differential 16 on the engine 9 side to the front wheels 7.

A pair of left and right rear wheels (not shown) supported on the rear portion of the vehicle body 2 are connected to the transfer 13 in an interlocked manner.

When the engine 9 is driven, its power is transmitted to each front wheel 7 via the clutch means 12, transfer 13, drive shaft 18, differential device 16, and power transmission shaft 20 in order. At the same time, the power is transmitted to the respective rear wheels via the transfer 13, thereby enabling the vehicle 1 to run on the ground by four-wheel drive.

The main frame 4 includes a pair of left and right side frames 22, 22 which extend in the front-rear direction and are located on the left and right sides of the front portion of the vehicle body 2, and extend in the vehicle width direction. A rear cross member 24 extending in the vehicle width direction and connecting the rear ends of the side frames 22, 22 at the front of the vehicle body 2 to each other; The cross member 24 is connected to each of the side frames 22 and 2.
2 is supported via an elastic mount 25.
That is, the power unit 14 is supported by the vehicle body frame 3 by the engine mounts 10, 10 and the mount 25.

The sub-frame 5 includes a pair of left and right sub-side frames 28, 28 which are located below the left and right side frames 22, 22 and extend in the front-rear direction on the left and right sides of the front of the vehicle body 2. A sub front cross member 29 extending in the width direction and connecting the front ends of the two sub side frames 28 to each other; and a sub rear cross member extending in the vehicle width direction and connecting the middle portions in the front-rear direction of the sub side frames 28 and 28 to each other. A cross member 30 and a connecting frame 33 projecting upward from a front portion of each of the sub-side frames 28 are provided.

A protruding end (upper end) of the coupling frame 33 is detachably fastened to a middle part in the front-rear direction of each of the side frames 22 by a fastener 31 and a rear end of each of the sub-side frames 28. Are detachably fastened to the side frames 22 by fasteners 32, whereby the sub-frame 5 is detachably connected to the main frame 4.

The engine 9 is provided with the two connecting frames 3.
3, 33, and are supported by the respective protruding ends via the engine mount 10.
The engine mount 10 includes a lower bracket 35 fixed to an inner side in the vehicle width direction at a protruding end of the coupling frame 33, an upper bracket 36 fixed to a side surface of the engine 9, and a lower bracket 35. Rubber and elastic buffer 3 interposed between upper bracket 36
The buffer 37 absorbs the vibration of the engine 9 and suppresses the transmission of the vibration to the coupling frame 33 of the sub-frame 5.

In the above case, the joint 39 of the projecting end of the connecting frame 33 with respect to the side frame 22 is improved in rigidity by the connection with the side frame 22. Then, the engine mount 10 is located near the coupling portion 39, that is, the engine 9 is supported via the engine mount 10 near the coupling portion 39 whose rigidity has been improved as described above.

Therefore, the combined frame 3 of the subframe 5
3, the rigidity of the support portion of the engine 9 via the engine mount 10 is further improved by a simple configuration without the need for a separate reinforcing member, whereby the vibration of the engine 9 is more effectively achieved by the engine mount 10. The vibration of the vehicle body 2 being absorbed is more reliably prevented.

The suspension 8 has a pair of front and rear pivot shafts 4 on the front of the sub-side frame 28 of the sub-frame 5.
2 and 42, and a lower arm 43 pivotally supported so as to be able to swing up and down via an elastic body. The lower arm 43 is located outside each of the sub-side frames 28, and is provided at a swing end thereof. The front wheel 7 is supported.

The engine 9 and the differential device 16 are arranged between the left and right coupling frames 33, 33, and are arranged so as to be vertically stacked, and are arranged so as to be compact in the left-right direction and the front-back direction. ing. Further, the front wheel 7 is also located at the same position as the coupling frame 33 in the front-rear direction and outside the coupling frame 33.

The coupling frame 33 is viewed from the side (FIG. 1).
The power transmission shaft 20 penetrates a space 44 surrounded by the coupling frame 33 from the differential device 16 on the engine 9 side toward the front wheel 7.

Although the connecting frame 33 has a certain size for firmly supporting the engine 9, the power transmission shaft 20 passes through a space 44 surrounded by the connecting frame 33. Therefore, the coupling frame 33 and the power transmission shaft 20 are disposed at the same position in the front-rear direction. Accordingly, the power transmission shaft 2
The differential device 16 and the front wheel 7, which are linked to each other by 0, and the suspension 8 supporting the front wheel 7 are also arranged at the same position in the front-rear direction with the connecting frame 33.

Therefore, the front wheel 7, the suspension 8, the differential 16, and the power transmission shaft 2 in the front-rear direction.
0 and the arrangement of the coupling frame 33 are compact.

As described above, since the engine 9 is supported by the projecting end of the coupling frame 33 via the engine mount 10, the engine 9 is located at a higher position. At least a part of the differential device 16 and the power transmission shaft 20 are disposed on the lower side, and a part of the differential device 16 and the power transmission shaft 20 overlap with the engine 9 as shown in FIGS. Becomes

Therefore, the front wheel 7, the suspension 8, the differential 16, the power transmission shaft 20, and the coupling frame 33 and the engine 9 are arranged at the same position in the front-rear direction. Becomes compact.

Further, as described above, since the differential device 16 and the power transmission shaft 20 partially overlap the engine 9 in the up-down direction, the arrangement thereof is compact even in the vehicle width direction.

When assembling the components of the front part of the automobile 1, the front wheels 7, the suspension 8, the power unit 14, the differential unit 16, the drive shaft 18, the power The transmission shaft 20 is supported, and these are made into one unit. Then, this is assembled to the main frame 4 by the fasteners 15 and 31.

[0039]

The effects of the present invention are as follows.

According to a first aspect of the present invention, there is provided a main frame in which the body frame supports the body, and a sub-frame disposed below the main frame and supporting the engine via an elastic engine mount. Component parts of the front part of the vehicle, comprising a pair of left and right sub-side frames extending in the front-rear direction and a coupling frame projecting upward from each of these sub-side frames and having a protruding end coupled to the main frame. In the arrangement structure,

The engine is mounted on the projecting ends of the connecting frames, and is supported on the projecting ends via the engine mount. The engine mount is mounted on the projecting end of the connecting frame with respect to the main frame. It is located near the joint.

For this reason, in the vicinity of the connecting portion which is connected to the main frame and whose strength is improved by the main frame, an engine is supported at the projecting end of each of the connecting frames via the engine mount. Becomes

Therefore, the rigidity of the support portion of the engine in the connecting frame of the sub-frames can be improved with a simple structure without the need for a separate reinforcing member, whereby the vibration of the engine can be more effectively absorbed by the engine mount. Then, the transmission of the vibration to the vehicle body via the sub-frame is suppressed, and as a result, the vibration of the vehicle body is more reliably prevented.

According to a second aspect of the present invention, the suspension supporting the front wheels is supported by the subframe, and extends in the vehicle width direction from the engine to the front wheels to transmit the power of the engine to the front wheels. The coupling frame is substantially gate-shaped in side view, and the power transmission shaft passes through a space surrounded by the coupling frame.

For this reason, although the coupling frame has a certain size for firmly supporting the engine, the power transmission shaft passes through the space surrounded by the coupling frame. The coupling frame and the power transmission shaft are arranged at the same position in the front-rear direction. Accordingly, the front wheels, which are interlocked with the engine by the power transmission shaft, and the suspensions that support the front wheels are also arranged at the same position in the front-rear direction with the coupling frame.

Therefore, these front wheels in the front-rear direction
The arrangement of the suspension, the power transmission shaft, and the coupling frame is made compact, so that the overall length of the vehicle is shorter than in the related art in which the coupling frame and the power transmission shaft have to be arranged side by side in the front-rear direction.

Further, since the engine is supported on the projecting end of the coupling frame via the engine mount as in the first aspect of the present invention, the engine is located at a higher position. At least a part of the power transmission shaft is disposed on the side, and a part of the power transmission shaft overlaps the engine.

Therefore, the front wheels, the suspension, the power transmission shaft, the coupling frame, and the engine are arranged at the same position in the front-rear direction, and the arrangement in the front-rear direction is compact. The overall length becomes shorter.

Further, as described above, since a part of the power transmission shaft overlaps the engine in the up-down direction, these arrangements are compact even in the vehicle width direction, so that the overall length of the vehicle in the vehicle width direction is reduced. Can be shorter.

[Brief description of the drawings]

FIG. 1 is a side view of a front portion of a vehicle body of an automobile.

FIG. 2 is a plan view of a front portion of a vehicle body of an automobile.

FIG. 3 is a front view of a front portion of a vehicle body of the automobile.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Automobile 2 Body 3 Body frame 4 Main frame 5 Subframe 7 Front wheel 8 Suspension 9 Engine 10 Engine mount 16 Differential device 20 Power transmission shaft 28 Subside frame 31 Fastener 33 Coupling frame 39 Coupling part 44 Space

Claims (2)

[Claims] 1. A vehicle body frame comprising: a main frame supporting a body; and a sub-frame disposed below the main frame and supporting an engine via an elastic engine mount. In a component arrangement structure for a front part of an automobile, the pair of left and right sub-side frames extend and a coupling frame that projects upward from each of the sub-side frames and has a protruding end coupled to the main frame. The engine is mounted on the projecting ends of the two connecting frames, and is supported on the projecting ends via the engine mount. The engine mount is connected to the connecting portion of the projecting end of the connecting frame with respect to the main frame. A structure for arranging components at the front of the car, located nearby. 2. A power transmission shaft for supporting a front wheel on the subframe and extending in a vehicle width direction from the engine to the front wheel to transmit power of the engine to the front wheel. 2. The power transmission shaft according to claim 1, wherein the coupling frame has a substantially gate shape in a side view, and the power transmission shaft passes through a space surrounded by the coupling frame.
4. A structure for disposing components of a front part of a vehicle according to (1).