KR19980035583A - Lower arm fastening structure of cross member - Google Patents

Abstract

The present invention relates to a lower arm fastening structure of a cross member, comprising: a sleeve (4) integrally attached to the distal end of the lower arm (3), a bush (5) inserted into and supported by the sleeve (4), and the bush (5) is fitted to the cross member (1) while being fitted through the structure having a support bar (6) for supporting the lower arm (3), the lower arm is supported on the support bar fastened to the cross member through the bolt The lower arm facilitates fastening of the lower arm, and the lower arm can be easily attached or detached during assembly or maintenance of the vehicle, and the lower arm can be subjected to repeated shocks or vibrations while the vehicle is being driven. Since there is no fear of breakage of the fastening part, the durability is excellent and the structure is simple, so that the cost can be reduced.

Description

Lower arm fastening structure of cross member

The present invention relates to a lower arm mounting structure of a cross member of a vehicle, and in particular, when a support bar is fitted to a bush integrally formed at the front end of the lower arm and is fastened with a bolt to the side of a # -type cross member, the assembly or maintenance of the vehicle is performed. It is related with the lower arm fastening structure of the cross member which is easy to attach / detach the lower arm, excellent durability, and simple structure, and can aim at cost reduction.

In general, the suspension of the vehicle is connected to the axle and the body so that the vibration or shock received from the road surface is not directly transmitted to the body while driving, thereby preventing damage to the body and cargo and improving ride comfort. It consists of a chassis spring for mitigating, a shock absorber for controlling the free vibration of the chassis spring to improve ride comfort, and a stabilizer for preventing rolling of the vehicle.

The suspension is divided into a front suspension and a rear suspension according to the mounting portion of the vehicle, and the axle suspension type that connects the axle-type front axle connected to the axle with the left and right wheels to one axle with a spring, and both left and right sides. As it is installed on the car body to operate independently of the wheels, it is divided into an independent suspension type that has a light spring load, good ride comfort, and excellent grounding and controllability.

Here, the independent suspension type is provided with two upper and lower suspension arms of the V-shape installed on the frame by the shaft, and the end of each suspension arm is mounted on the knuckle by the bowl joint and horizontally installed with a leaf spring. Or a horizontal spring type with the spring acting as the lower suspension arm, a trailing link type that supports the wheels by one or two arms facing the rear of the car, simpler in structure than the wishbone type Not only this, there is also the McPherson type with good road holding and riding comfort.

In addition, the McPherson-type suspension is composed of a strut and a suspension arm having a shock absorber and integrally connected with the knuckle, a bowl joint and a spring connecting the suspension arm and the lower part of the strut, and the upper part of the strut is a suspension support. In addition to being coupled to the body through the suspension support on the suspension support is to allow the strut to rotate freely.

On the other hand, the cross member of the vehicle has a T-shape, and the front end of the lower arm constituting the suspension arm is mounted on the cross member. There was a flaw.

In addition, the T-shaped cross member is light in weight but structurally difficult to mount a suspension device. Therefore, the cross member of the # type cross member is used in the rear two. While the point is mounted on the bottom of the body floor, the two front points are mounted on the bottom of the front side member, allowing the engine and transmission to be mounted on the cross member as it is, increasing the torsional rigidity of the front part of the vehicle. It is heavier than a T-shaped cross member, but it has the advantage of increasing design freedom and improving all other performance.

Accordingly, the present invention has been made in view of the above circumstances, and the lower arm is detachably mounted to the # -type cross member via a bolt, so that the lower arm can be easily attached and detached during assembly or maintenance of the vehicle. It is an object of the present invention to provide a lower arm fastening structure of a cross member that is superior in structure and simple in structure to reduce cost.

1 is a schematic perspective view of a lower arm mounted on a cross member according to the present invention;

2 is a schematic plan view of FIG. 1;

3 is an enlarged perspective view illustrating main parts of FIG. 2;

4 is an exploded perspective view of FIG. 3.

* Description of the symbols for the main parts of the drawings *

1: cross member 2: wheel

3: lower arm 4: sleeve

5: bush 6: support bar

7: mounting member

The present invention for achieving the above object is a sleeve integrally attached to the distal end of the lower arm, a bush supported and inserted into the sleeve, and fastened to the cross member while being inserted through the bush to secure the lower arm. It has a structure with supporting bars.

Both ends of the support bar are fitted to the mounting member and fastened to the cross member by bolts. A circular washer is integrally formed on the surface of the mounting member opposite to the bush so as to be in close contact with the bush.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a schematic perspective view of a lower arm mounted on a cross member according to the present invention, FIG. 2 is a schematic plan view of FIG. 1, FIG. 3 is an enlarged perspective view of part A of FIG. 2, and FIG. 4 is an exploded view of FIG. 3. A bar is a perspective view, i.e., a cross-shaped member (1) having a # -shape is mounted on the front body of the vehicle at the bottom and side members in a four-point support manner, and the lower side is adjacent to the wheel (2) of the cross member (1). The arm 3 is fastened.

Here, one end of the lower arm 3 is attached to a knuckle (not shown) of the wheel, and the other end is fastened to the cross member 1 in a two-point supporting manner.

That is, the sleeve 4 is integrally attached to the distal end of the lower arm 3, and the bush 5 is inserted into the sleeve 4 and supported therein, and the support bar 6 passes through the bush 5. ) Is fitted to the cross member 1 via a bolt to support the lower arm to the cross member 1.

The support bar 6 has a hollow pipe shape, and both ends thereof are forged into quadrangular shapes, and bolt fastening holes 6a for fastening to the cross member 1 with bolts are respectively formed.

The support bar 6 has both ends thereof fitted with a mounting member 7 to be fastened to the cross member 1, and the mounting member 7 has a hollow pipe shape, and both ends thereof are forged in a square shape. In addition, the bolt fastening hole 7a is formed at a position corresponding to the fastening hole 6a of the support bar, and on the surface facing the bush 5 of the mounting member 7, a circular washer ( 7b) is integrally formed and in close contact with the bush.

As the lower arm is supported by being inserted into the support bar fastened to the cross member 1 via the bolt, the lower arm is extremely fastened, and the lower arm is easily detached during assembly or maintenance of the vehicle. Done.

And since there is no welded part in the lower arm joint part, even if repeated impact or vibration is applied to the lower arm while the vehicle is running, the lower arm fastener part is not damaged, so durability is excellent and the structure is simple and cost is reduced. It becomes possible to plan.

As described above, according to the lower arm fastening structure of the cross member according to the present invention, as the lower arm is supported by being inserted into the support bar fastened to the cross member via the bolt, the lower arm is extremely fastened and the vehicle It is easy to attach and detach the lower arm during assembling and maintenance. Also, even if the lower arm is repeatedly impacted or vibrated while the vehicle is running, the lower arm's fastening part is not damaged. The effect can be reduced.

Claims (4)

The sleeve 4 integrally attached to the distal end of the lower arm 3, the bush 5 inserted into the sleeve 4 and supported therein, and the bush 5 inserted through the bush 5, to the cross member 1; The lower arm fastening structure of the cross member which has a structure which has the support bar 6 which is fastened and supports the lower arm 3. The lower arm fastening structure of a cross member according to claim 1, wherein said cross member (1) is formed in a # shape. The lower arm fastening structure of a cross member according to claim 1 or 2, wherein the support bar (6) is fitted to the mounting member (7) and fastened to the cross member (1). 4. The bolt fastening hole (7a) according to claim 3, wherein the mounting member (7) has a hollow pipe shape and both ends thereof are forged in a quadrilateral shape, and the bolt fastening hole (7a) is formed at a position corresponding to the fastening hole (6a) of the support bar. And a round washer (7b) formed integrally with the bush on a surface of the mounting member (7) opposite to the bush (5).