JP3146899B2 - Car body front structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle body front structure.
It is about.

[0002]

2. Description of the Related Art Conventionally, a first portion extending in a vehicle width direction is provided at a front portion of a vehicle body at an appropriate interval in a vehicle front-rear direction.
And a second cross member are juxtaposed, and both ends of each of the cross members are connected to a pair of left and right subframes extending in the vehicle longitudinal direction by bolts to form a rectangular frame-shaped support, A structure in which an engine mount bracket is provided on a sub-frame of the support has already been disclosed in Japanese Patent Application Laid-Open No. Hei 4 (1994).
-118325. This proposed engine support structure has a structure in which the sub-frame is
Divided, the front sub-frame and the rear sub-frame are characterized by being detachably connected by an engine mount bracket, but since the left and right sub-frames are divided in the front-rear direction, There is a problem that the joints are susceptible to defects in strength, the structure of the engine mount bracket is extremely complicated and requires precise machining, and the joint end of the subframe to be joined also needs high precision Therefore, there is a disadvantage that the manufacturing cost becomes extremely high. Further, since the sub-frame of the rectangular frame-shaped support is weak in strength as described above, the lower arm of the suspension supporting the wheels is formed in a V-shape, and the V-leg ends thereof are respectively formed in the first and second legs. Since it is necessary to pivot with a cross member, there is a disadvantage that the suspension structure becomes complicated and expensive, and the weight increases.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has a simple structure and extremely high strength.
In addition to being lightweight and inexpensive to manufacture, the workability of assembling to the vehicle body is good, and at the same time, the vehicle body of the vehicle can simplify the suspension structure and reduce the cost.
It is intended to provide a front structure.

[0004]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention is directed to a left and right body frame extending in a vehicle longitudinal direction, and extending in the vehicle width direction and having both ends attached to the body frame. A first cross member detachably fixed,
A second cross member disposed in the vehicle width direction behind the first cross member at a required vehicle longitudinal direction interval and having both ends detachably fixed to the vehicle body frame, substantially in the vehicle longitudinal direction; And each of the front ends thereof is connected to the first
Left and right support members detachably fixed to the second cross member and detachably fixed at the rear end to the second cross member, and disposed rearward in the vehicle longitudinal direction with an interval from the second cross member. An engine transmission body comprising: a third cross member mounted on the vehicle body frame; an engine elastically supported by the support member and vertically mounted; and a transmission coupled to the engine and supported by the third cross member. The engine has left and right supports at its left and right ends.
Supported by the holding member at two points, and the line connecting these support points is
The present invention proposes a vehicle body front structure which passes near the center of gravity of a gin .

[0005]

[0006]

According to the structure of the present invention, the engine is mounted on both the left and right sides.
The end is supported at two points by left and right support members,
The line connecting the holding points passes near the center of gravity of the engine.
And therefore, added to the force via the first and second cross member from the left and right support members body frame when the longitudinal direction of the rocking motor vehicle is applied to the engine, since the swinging force is effectively distributed The body frame is securely supported without deformation. Further, the transmission rigidly connected to the front end engine is also elastically supported by the vehicle body frame near the rear end thereof via a third cross member.
In cooperation with the second cross member, the swinging power is reliably dispersed and transmitted to the vehicle body frame to support it.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be specifically described below with reference to the accompanying drawings. In the drawing, reference numeral 10 denotes left and right body frames extending in the vehicle front-rear direction. Reference numeral 12 denotes a vehicle body extending in the vehicle width direction. Both ends thereof are detachably fixed to the lower side of the body frame 10 by bolts or the like. The first cross member or the shacyclos member. The first cross member 12 is shown in FIG.
As best shown in the front view of FIG. 3 and the perspective view of FIG.
The front shape has a shallow U-shape, and the left and right leg ends rising at both ends in the vehicle width direction are fixed to the vehicle body frame 10. Further, the first cross member 12 has a hat-shaped cross section with an open lower part as a whole, and is preferably formed by stamping a steel plate.

A second cross member or a differential cross member 14 is disposed to extend in the vehicle width direction at an appropriate interval in the vehicle longitudinal direction with respect to the first cross member 12. The second cross member 14 is formed by fixing mounting brackets 16 which are detachably fixed to the lower sides of the left and right body frames 10 by bolts or the like at both ends of the pipe material by welding or the like.

Right and left front mounting brackets 18 are provided adjacent to the left and right end portions of the first cross member 12 and above the cross member by appropriate fixing means such as welding and bolts. Two cylinder brackets 20 for mounting a pusher cylinder for power steering are mounted on the upper side of the cross member on the inner side. Further, an intermediate portion between the left and right cylinder brackets 20 of the cross member is shown in FIG.
The front differential 22 indicated by a two-dot chain line (in this specification, a front differential and a front axle housing including a front axle are referred to as a front differential for convenience. A differential support seat 24 for supporting a substantially central front portion of the same) is formed.

Also, left and right rear mounting brackets 26 are provided by welding or the like on the upper side of the cross member adjacent to the mounting brackets 16 at both right and left ends of the second cross member 14, respectively. On the lower side, left and right differential brackets 30 that support rear ends of left and right support arms 28 (see FIG. 4) extending rearward from right and left sides of the front differential 22 are vertically provided.

The left and right front mount brackets 18
And right and left engine mount device support members 32 (hereinafter sometimes abbreviated as support members) extending substantially in the vehicle longitudinal direction across the corresponding left and right rear mount brackets 26, and these support members 32 are respectively bolted. 3
4, the front and rear mounting brackets 18 and 26
It is detachably fixed to. A well-known engine mount device 38 having a rubber butt 36 is fixed to the upper side of the support member 32 by a bolt or the like. As shown in FIG. 2, the left and right engine mounting devices 38 support mounting legs 42 protruding from both sides of the vertically mounted engine 40. At the rear end of the engine 40, a transmission 44 is mounted as shown by a dashed line in FIG. 1, and an input end 46 of the front differential 22 from a transfer (not shown) connected to the transmission 44. , The driving force of the engine 40 is transmitted. The support member 32 that supports the engine 40 is disposed so as to cross a plane passing through the center of gravity of the engine 40 in the vehicle width direction or in the vicinity thereof.

FIG. 1 shows a support member 3 for an engine mount.
4 and FIG. 5, and FIG. 6, which is a cross-sectional view taken along the line VI-VI of FIG. Front axle 48 from both ends in the half width direction of the
Extend outward to reach a knuckle 50 of a front wheel (not shown). On the other hand, a corrugated plate 52 hanging downward is fixed to both end portions of the first cross member 12 in the vehicle width direction, and the inner end of the lower arm 58 is attached to the corrugated plate 52 via a pivot 54 and a rubber bush 56. Is pivoted. The lower arm 58 has a rod shape (here, the rod shape does not mean only a solid rod, but has a V-shaped or U-shaped plane shape, and has two or more leg ends pivoted toward the vehicle body. It means that it extends substantially linearly, or extends as a single member, even if it has some curved portions, excluding the supported shape. Includes a hat-shaped member and a groove-shaped member.) It extends in substantially the same direction as the front axle 48, that is, in the vehicle width direction, and the outer end of the vehicle body is connected to the knuckle 50 via a ball joint or the like. Be pivoted. The knuckle 50 is connected to a vehicle body via a suspension strut 60, only a part of which is shown in FIG.

Further, a third cross member 62 is disposed behind the second cross member 14 at an appropriate distance in the longitudinal direction of the vehicle body, and both ends of the third cross member 62 are bolts and nuts. It is detachably attached to the frame 10. A transmission support bracket 64 protrudes above a substantially central portion of the third cross member 62 in the vehicle width direction, and the rubber bush 66 and the support shaft 6 near the rear end of the transmission 44 by the bracket 64.
8 elastically supported.

According to the above configuration, in comparison with the above-mentioned proposed configuration, the left and right body frames 10 and the left and right support members 32 for mounting the engine and the first and second cross members arranged in the vehicle longitudinal direction. Since the members 12 and 14 form an extremely rigid rectangular engine support frame having two right and left vertical members, it is possible to ensure running stability and durability enough to withstand rough road running. In addition, since the rigidity of the rectangular engine support frame is high, a simple rod-shaped lower arm 58 can be adopted, and the suspension device is simplified and the weight is reduced as compared with the V-shaped lower arm widely used conventionally. In addition, the manufacturing cost can be reduced. Further, in the above-described configuration, the front differential 22 has a central front portion supported by a substantially central portion of the first cross member 12, and rear ends of both ends in the vehicle width direction connected to the second cross member 14. Serves as a triangular bracing, and thus has the advantage of being an essentially rigid reinforcement of the rectangular engine support frame, which further increases the strength. Also, left and right support members 32 for mounting the engine are provided.
However, since each of them is configured to be detachable, there is an advantage that the front differential 22 can be easily mounted in the vehicle device, and the maintenance property in the market is good. Further, there is an advantage that it is possible to easily cope with various different types of engines simply by changing the shape and dimensions of only the support member 32 for mounting the engine. Furthermore, when compared with the previously proposed device described above, as a support member for mounting the engine does not use special precision parts that require a high degree of machining, not only the above-mentioned superiority in strength but also This has the advantage that the manufacturing cost can be greatly reduced.

[0015]

The vehicle body front structure according to the present invention comprises:
Left and right body frames extending in the vehicle front-rear direction, a first cross member extending in the vehicle width direction and having both ends detachably fixed to the body frame, a rear side of the first cross member. A second cross member which is disposed in the vehicle width direction with a required space in the vehicle front-rear direction and both ends of which are detachably fixed to the vehicle body frame; Left and right support members having a front end detachably fixed to the first cross member and a rear end detachably fixed to the second cross member, a longitudinal direction of the vehicle body having an interval with the second cross member. A third cross member disposed rearward and mounted on the vehicle body frame, an engine resiliently supported by the support member and vertically mounted, and a transmission coupled to the engine and supported by the third cross member. Narue It has a gin mission body, supported at two points on the left and right supporting member the engine is at its left and right end portions
The line connecting these support points is near the center of gravity of the engine.
When the oscillating power in the vehicle front-rear direction and the left-right direction acts on the engine transmission body during traveling, the oscillating power is dispersed and transmitted to the vehicle body frame via the left and right support members. There is an advantage that a large torsional deformation or a bending deformation does not occur in the frame, the traveling performance on rough roads can be improved, and the riding comfort can be improved. Further, according to the vehicle body front structure according to the present invention, the first cross member extending in the vehicle width direction and the vehicle body in the vehicle width direction at a required interval behind the first cross member. And the second cross member is disposed so as to extend substantially in the front-rear direction of the vehicle body, and has a front end detachably fixed to the first cross member and a rear end detachable to the second cross member. The left and right support members fixed to the vehicle body are assembled, then the engine transmission body is placed vertically, the engine is elastically mounted on the left and right support members, and the transmission is spaced from the second cross member with the front and rear of the vehicle body. Since the first and second third cross members can be mounted on the vehicle body frame after being mounted on the third cross member disposed rearward in the direction, there is an advantage that the assembling workability is excellent. According to the present invention by summarizing the above,
The present invention has the effect of providing a vehicle body front structure and assembly that is simple and lightweight, has extremely excellent strength and durability, and has excellent assembling workability and maintainability of a front differential, an engine, and a suspension device.

[Brief description of the drawings]

FIG. 1 is a plan view of a main part showing an embodiment of the present invention.

FIG. 2 is a front view showing only a main part of the apparatus shown in FIG. 1;

FIG. 3 is a perspective view of a main part of the apparatus shown in FIG.

FIG. 4 is a partial plan view showing the engine mounting support member removed from FIG. 1;

FIG. 5 is a front view showing a support portion of the lower arm shown in FIG. 4 in an extracted manner;

FIG. 6 is a sectional view taken along the line VI-VI in FIG. 5;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 ... Body frame, 12 ... 1st cross member (shaft cross member), 14 ... 2nd cross member (diff cross member), 18 ... Front mount bracket, 22 ... Front differential, 24 ... Diff support seat, 26 ... Rear mounting bracket, 32 ... Engine mounting device support member, 34 ... Bolt, 38 ... Engine mounting device,
40 ... engine, 42 ... mount leg, 44 ... transmission, 48 ... front axle, 50 ... knuckle,
58: lower arm, 60: suspension strut,
62: third cross member, 66: rubber bush.

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-3-276821 (JP, A) Japanese Utility Model Showa 64-55122 (JP, U) Japanese Utility Model Showa 60-61926 (JP, U) Japanese Utility Model Showa 56- 62219 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) B60K 5/00-5/12 B62D 21/00-21/02 B62D 25/00-25/08 B62D 25/14 -25/22

Claims (1)

(57) [Claims] 1. A left and right body frame extending in a vehicle front-rear direction, a first cross member extending in a vehicle width direction and having both ends detachably fixed to the body frame.
A second cross member disposed in the vehicle width direction behind the first cross member at a required vehicle longitudinal direction interval and having both ends detachably fixed to the vehicle body frame, substantially in the vehicle longitudinal direction; And each of the front ends thereof is connected to the first
The left and right support members detachably fixed to the cross member and the rear ends of which are detachably fixed to the second cross member. The left and right support members are disposed rearward in the vehicle longitudinal direction with an interval from the second cross member. An engine transmission body comprising a third cross member mounted on the body frame, an engine elastically supported by the support member and vertically mounted, and a transmission coupled to the engine and supported by the third cross member. And the engine is supported on both left and right ends.
The member is supported at two points, and the line connecting these points is the engine
The front structure of a vehicle body, which passes near the center of gravity of the vehicle.