KR20040072941A - Semi-Trailing Arm Type Rear Suspension of Automobile - Google Patents

Abstract

PURPOSE: A semi-trailing arm-type rear suspension of a vehicle is provided to prevent toe-out of rear wheels through reinforcement of the transverse rigidity of a cross member to prevent the cross member from being bent when lateral force acts on the rear wheels. CONSTITUTION: A semi-trailing arm-type rear suspension of a vehicle comprises semi-trailing arms(54) and a cross member(56). One end of the semi-trailing arm is rotatably combined to a hub(52) to which a rear wheel is combined rotatably integrally and the other end is obliquely projected rearward, to support the rear wheel. The cross member supports the other end of the semi-trailing arm rotatably upward. The plane of the cross member is formed in a pound-shape for the reinforcement of the strength and the cross member is fixed to a vehicle body. The cross member comprises front and rear members separating in the front and rear directions, and right and left members installed between the front and rear members. Each member is formed in a hollow pipe shape and is welded to each other.

Description

Semi-Trailing Arm Type Rear Suspension of Automobile}

The present invention relates to a semi-trailing female rear suspension of a vehicle, and more particularly, to a semi-trailing female rear suspension of a vehicle in which a cross member fixed to the vehicle body and rotatably supporting the semi-suspension arm in a vertical direction is formed in a well sperm shape for reinforcement. It is about.

In general, a suspension is a device that connects the axle and the body so that vibrations or shocks received from the road surface are not transmitted directly to the vehicle body, thereby preventing damage to the cargo accumulated on the vehicle body or the vehicle body, and improving ride comfort. The shock absorber is provided with a chassis spring, a shock absorber that suppresses free vibration of the chassis spring to improve ride comfort, and both ends are connected to left and right chassis springs, respectively, and a stabilizer bar to prevent the vehicle from shaking sideways.

The suspension is divided into a front suspension installed between the front wheels and a rear suspension installed between the rear wheels according to the installation position, and according to the type of axle, the axle type and the axle for connecting the left and right wheels into one axle are divided. It is divided into independent to support the left and right wheels respectively.

In particular, the independent rear suspension has the effect of lightening the weight under the chassis spring to improve ride comfort or road holding, and lowering the bottom of the body to increase the interior space of the cabin, swing axle, trailing arm and semi-trail. It is subdivided into ring female and diamond link.

1 is a perspective view of a semi trailing female rear suspension of a vehicle according to the prior art, and FIG. 2 is a plan view of a semi trailing female rear suspension of a vehicle according to the prior art.

Semi-trailing female rear suspension according to the prior art is a suspension having the intermediate characteristics of the swing axle type and the trailing sub-type by the arm supporting the wheel obliquely to the rear, the rear axle for transmitting the torque of the engine to the rear wheel (2 Cross member 4 parallel to the rear axle 2 is arranged behind the rear axle to form a skeleton of the suspension, and is fixed to the end of the cross member 4 and the rear axle 2 and bolted to the rear wheel. A semi trailing arm 8 is installed between the hubs 6 to control the movement of the rear wheel. A chassis spring 10 is installed between the upper side of the semi trailing arm 8 and the vehicle body. A shock absorber 12 is provided between the axle 2 and the vehicle body.

Here, the semi trailing arm 8 has two ends 8b and 8c having one end 8a coupled to the rear of the hub 6 such that the hub 6 can be rotated and branched laterally. Each of these protrudes obliquely toward the rear, and is installed on the cross member 4 so as to be rotatable vertically.

On the other hand, the semi-trailing female rear suspension changes the tread, camber, and toe angles when the rear wheel moves up and down, so that the two universal joints 14 are connected to the rear axle 2 so that the torque of the engine can be smoothly transmitted to the rear wheel. In addition to this, a sleeve joint 16 is required.

However, the semi-trailing arm type rear suspension of the vehicle according to the prior art generates a rotation moment M to be rotated outwardly to the semi-trailing arm when a lateral force F is applied to the rear wheel. Since the rear wheel is torn out and tries to roll out due to the opposite direction from the inner end 8b and the outer end 8c of the semi trailing arm 8, the oversteer phenomenon occurs. Steering is very unstable.

The present invention has been made to solve the above-mentioned problems of the prior art, and when the lateral force is applied to the rear wheel, reinforce the lateral stiffness of the cross member so that the cross member is not bent to prevent toe-out of the rear wheel. The purpose is to provide a semi-trailing female rear suspension of a vehicle.

1 is a perspective view of a semi-trailing female rear suspension of a vehicle according to the prior art;

2 is a plan view of a semi trailing female rear suspension of a vehicle according to the prior art,

3 is a perspective view of a semi trailing female rear suspension of a vehicle according to the present invention;

4 is a cross-sectional view taken along the line 'A-A' of FIG.

5 is a plan view of a semi trailing female rear suspension of a vehicle according to the invention.

<Explanation of symbols on main parts of the drawings>

50: rear wheel 52: hub

54: semi trailing arm 56: cross member

Semi-trailing female rear suspension of a vehicle according to the present invention for solving the above problems is one end rotatably coupled to the hub coupled to the rear wheel is integrally rotated and the other end protrudes obliquely toward the rear of the rear wheel It comprises a semi trailing arm for supporting the cross member for supporting the other end of the semi trailing arm to be rotated in the vertical direction,

In particular, the cross member is characterized in that the plane is fixed to the vehicle body is formed in a well sperm shape for strength reinforcement.

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

Semi-trailing female rear suspension of the vehicle according to the present invention, one end 54a is rotatably coupled to the hub 52 to which the rear wheel 50 is integrally rotated, and the other end protrudes obliquely toward the rear. A semi trailing arm 54 supporting the rear wheel 50 and a flat sperm shape for reinforcing strength, and the other end 54b of the semi trailing arm 54 in the vertical direction. The cross member 56 which supports so that rotation is possible is comprised.

Between the left and right rear wheels 50, a differential 60 for differentially torqueing the engine according to the load received by the left and right rear wheels from the road surface is installed in the vehicle body, and the differential 60 and the left / right rear Left and right rear axles 62 are installed in the transverse direction between the wheels 50 to smoothly transmit torque of the engine differential from the differential 60 so that the left and right hubs 52 are fixed to the outer ends, respectively. The left and right hubs 52 are bolted to rotate the rear wheels 50 integrally.

The semi trailing arm 54 supports one end 54a of the rear wheel 50 coupled to the hub 52 by being coupled to the rear of the hub 52 so that the hub 52 can be rotated. The other end 54b is divided in two in the lateral direction and protrudes at an angle with respect to the axial direction of the rear axle 62.

In addition, fastening holes 54c are formed at the two other ends 54b of the semi trailing arm 54, and hinge pins 54d are formed in the fastening holes 54c of the semi trailing arm 54, respectively. To couple the two other ends 54b of the semi trailing arm 54 so as to be rotatable in the vertical direction to the cross member 56, respectively, the fastening hole 54c and the hinge of the semi trailing arm 54. A cylindrical rubber bush 54e is interposed between the pins 54d to absorb vibrations and shocks transmitted from the semi trailing arms 54 to the cross member 56.

The cross member 56 has front and rear members 56a and 56b spaced apart in the front and rear direction with respect to the rear axle 62, and the differential 60 and the chassis between the front and rear members 56a and 56b. The spring 64 is spaced apart from each other so as to be installed on the vehicle body, and the left and right members 56c and 56d transversely in the front and rear direction are spaced apart in the transverse direction between the front and rear members 56a and 56b. The chassis spring 64 is formed to be spaced apart from each other so as not to interfere with the chassis spring 64.

Here, the other end 54b of the semi trailing arm 54 is inserted into the rear member 56b of the cross member 56 so that the hinge pin 54d is fitted to each other so that the length of the rear member 56b is fitted. A pair of brackets 57 spaced apart from each other at predetermined intervals in the direction are projected to support the other end 54b of the semi trailing arm 54 so as to be rotatable in the vertical direction, respectively, and the front member 56a. Is formed to face the rear axle 62 and the rear member 56b, and the left and right members 56c and 56d are respectively formed straight in the front-rear direction.

The cross member 56 has a through hole 56e corresponding to a fastening hole formed in the vehicle body in the vertical direction at both ends of the front and rear members 56a and 56b, respectively. The through-hole 56e of the 56 is positioned to coincide with the fastening hole of the vehicle body in the vertical direction, and then the bolt B is the through-hole 56e of the cross member 56 in the upward direction below the cross member 56. ) And through the fastening holes of the vehicle body at the same time and screwed with the nut (N), is fixed to the vehicle body.

Here, a cylindrical rubber bush 58 penetrates up and down between the through hole of the cross member 56 and the bolt B so that vibration or impact of the road surface is transmitted to the vehicle body through the cross member 56. It is buffered so as not to.

In addition, as shown in FIG. 4, each member 56a, 56b, 56c, 56d of the cross member 56 is formed into a pipe by a hydroforming method, and then welded to each other to be joined in a well sperm shape.

On the other hand, although not shown, between the one end 54a side of the semi trailing arm 54 and the left and right members 56c and 56d of the cross member 56, the lateral rods (not shown) May be provided to further reinforce the lateral strength of the cross member 56.

Therefore, in the present invention, since the cross member 56 is formed in a well sperm shape and secures each other so that external forces transmitted to the cross member 56 are distributed in all directions, the lateral force is applied to the rear wheel 50. By this action, even if the rotation moment of the semi-trailing arm 54 is hardly bent deformation, it is possible to prevent the over-steering phenomenon due to the toe-out of the rear wheel 50.

The semi-trailing arm type rear suspension of the vehicle according to the present invention configured as described above is fixed to the vehicle body so that the cross member for supporting the semi-trailing arm for controlling the rear wheels to be rotatable in the vertical direction is formed in a well sperm shape. Even if the semi-trailing arm generates a rotation moment on the wheel, the external force applied to the cross member is distributed in all directions so that it is not bent and deformed. There is an advantage to this.

In addition, the present invention has the advantage that the lateral strength of the cross member can be further reinforced because a rattan rod is installed between the left and right members of the cross member and the semi trailing arm, respectively.

Claims (3)

One end is rotatably coupled to the hub to which the rear wheels are integrally rotated and the other end protrudes obliquely toward the rear to support the rear wheel, and the other end of the semi trailing arm in the vertical direction. In the semi-trailing female rear suspension of a vehicle including a cross member which is rotatably supported, The cross member has a semi-trailing female rear suspension of a vehicle, characterized in that the plane is formed in a well sperm shape for strength reinforcement fixed to the vehicle body. The method of claim 1, The cross member is composed of a front and rear members spaced apart in the front and rear direction, and the left and right members installed between the front and rear members, each member is formed in a hollow pipe type, characterized in that the vehicle is welded to each other Semi-trailing female rear suspension. The method of claim 1, Semi-trailing arm type rear suspension of a vehicle, characterized in that between the semi-trailing arm and the central pipe of the cross member crossing in the front and rear direction is provided a lateral rod for reinforcing the lateral strength of the cross member.