KR100451090B1 - Bush of rear semi trailing arm for vehicles - Google Patents

Abstract

The present invention relates to a rear semi-trailing arm bush of a vehicle, and more particularly, to an apparatus for improving the shape of the bush provided in the rear semi-trailing arm of a vehicle to cause toe-in behavior due to the change of the shape of the bush when a lateral force is applied to the wheel. In this regard, located in the holder 150 of the rear semi-trailing arm 100 to support the rear semi-trailing arm 100 to the subframe 200, so that the inner side is eccentrically toward the front and the outer side is eccentrically toward the rear Consists of a cylindrical bush 300 formed at a certain angle, to improve the rear semi-trailing arm bush of the vehicle to improve the grounding force of the rear wheel by improving the toe-in behavior due to the change of the bush shape when the lateral force acts on the wheel. It is to improve stability and marketability.

Description

Rear of trail trail arm for vehicles {Bush of rear semi trailing arm for vehicles}

The present invention relates to a rear semi-trailing arm bush of a vehicle, and in particular, to improve the shape of the bush provided in the rear semi-trailing arm of a vehicle, and is an apparatus for causing toe-in behavior by a change in the shape of the bush when a lateral force is applied to the wheel. The present invention relates to a device capable of improving the steering stability and the merchandise of a vehicle by improving the rear wheel grip.

In general, the suspension system of a vehicle connects the wheel and the body so that the wheels do not directly transmit vibrations or shocks received from the road surface to prevent damage to the body and cargo and improve ride comfort. It consists of a chassis spring to reduce vibration, a shock absorber to control the free vibration of the chassis spring to improve ride quality, and a stabilizer to prevent rolling of the vehicle.

In addition, the suspension system has an important role of transmitting the driving force generated in the driving wheel or the braking force of each wheel during braking to the vehicle body, and withstanding the centrifugal force during the turning, and maintaining each wheel in the correct position with respect to the vehicle body.

When the rear suspension is independent, the spring load can be reduced, which improves the riding comfort and road holding, and lowers the floor of the body, thereby increasing the space in the room. The current price is used.

In addition, power transmission to the drive wheels is transmitted by an axle having a universal joint from a longitudinal reduction gear fixed to the underbody.

In this way, the axle is called swing axle, which is a circular axle centering on the reduction gear due to the vertical movement of the wheel. The independent type is swing axle type, trailing arm type, rear semi-trailing arm type and diagonal link type. Etc.

The rear semi-trailing arm type is a suspension that is intermediate between the trailing arm and the swing axle.

Semi-trailing arm type protrudes the arm supported by the wheel to the rear. The smaller the angle, the closer to the trailing arm type, and the larger the angle, the closer the swing axle type.

1 is a plan view illustrating a rear semi-trailing arm suspension of a general vehicle.

As shown in FIG. 1, a rear semi-trailing arm suspension of a typical vehicle includes a subframe 200 having an outer side facing forward and a tire 130 and a reduction gear 140 on both sides, respectively. The drive shaft 110 is fastened, and the rear semi-trailing arm 100 is fastened to the drive shaft 110 on one side and the subframe 200 is fastened to the other side.

In this case, the rear semi-trailing arm 100 is divided into two parts toward the front of the vehicle body, and a holder 150 having a cylindrical elastic material bush (not shown) is formed therein, and the subframe 200 forms a predetermined angle. The holder 150 of the rear semi-trailing arm 100 is inserted into two or more brackets 210 fixed in a straight line and fixedly fastened through the fastening means 220, and the rear semi-trailing arm ( The stopper 100 may be further fastened with a stabilizer 120 or the like to prevent rolling.

The rear semi-trailing arm suspension device of a general vehicle configured as described above includes a subframe 200 for the tire 130 on which the rear semi-trailing arm 100 rotates through the longitudinal reduction gear 140 and the drive shaft 110. Will be supported.

Therefore, when the shock in the vertical direction is transmitted to the vehicle, the shock absorber (not shown) absorbs the vertical shock, and the lateral force generated in the tire 130 during the vehicle turning is the holder of the rear semi-trailing arm 100. A bush (not shown) provided in the 150 is buffered.

FIG. 2 is a plan sectional view of portion A of FIG. 1 showing a rear semitrailing arm bush of a conventional vehicle, and FIG. 3 is a tow characteristic of the lateral force of the suspension provided with the rear semitrailing arm bush of a conventional vehicle. 4 is a schematic diagram showing the occurrence of a toe-out phenomenon at the time of turning with respect to a vehicle provided with a rear semi-trailing arm bush of a conventional vehicle.

As shown in FIGS. 1 and 2, the rear semi trailing arm bush of the conventional vehicle has a cylindrical elasticity for fastening the rear semi trailing arm 100 to which the drive shaft 110 is fastened to the subframe 200. It is composed of a material bush (300).

The rear semitrailing arm bush 300 of the conventional vehicle configured as described above is made of a cylindrical elastic material and is provided in the holder 150 of the rear semitrailing arm 100 to be fixed to the subframe 200 ( By being fastened through the fastening means 210 and 220, the rear semi-trailing arm 100 serves to elastically support the subframe 200.

However, the rear semi-trailing arm bush of the conventional vehicle does not have a separate member supporting the lateral force when a lateral force is applied from the outside of the vehicle to the rear semi-trailing arm when the vehicle is turning, as shown in FIG. 1, At the same time, as shown in Figure 2, because the thickness of the bush is constant, the bush provided in the holder formed on the outer side of the rear semi-trailing arm is subjected to a force to move backward, the inner side of the rear semi-trailing arm The bush provided in the formed holder is subjected to a force to move forward, and consequently the same l deformation occurs in and out of the bush.

Accordingly, as shown in FIGS. 3 and 4, when the vehicle is turning, the rear wheels cause toe-in behavior, and the outer tires cause toe-out behavior, and as a result, the rear wheels of the vehicle are oversteered. This has caused a technical problem that the steering stability of the vehicle is lowered.

The present invention is to solve the above problems, by improving the rear semi-trailing arm bush of the vehicle to produce a toe-in behavior due to the change of the shape of the bush when the lateral force acts on the wheel to improve the traction of the rear wheels to improve the stability of the vehicle and productability To provide a rear semi-trailing arm bush of a vehicle that can improve the performance.

The present invention is located in the holder of the rear semi-trailing arm to support the rear semi-trailing arm to the subframe, by forming a cylindrical bush formed at an angle so that the inner side is eccentrically toward the front and the outer side is eccentrically toward the rear. Is achieved.

1 is a plan view showing a rear semi-trailing arm suspension of a typical vehicle;

FIG. 2 is a portion A of FIG. 1 showing a rear semi-trailing arm bush of a conventional vehicle. FIG.

Cross Section,

Fig. 3 shows the lateral force of a suspension provided with a rear semitrailing arm bush of a conventional vehicle.

A diagram showing the toe characteristic for

4 is a view of a vehicle having a rear semitrailing arm bush of a conventional vehicle.

Schematic showing the occurrence of a toe-out phenomenon at the time of turning,

5 is a plan sectional view showing a rear semitrailing arm bush of the vehicle of the present invention;

6 is a suspension device provided with a rear semitrailing arm bush of a vehicle of the present invention.

A diagram showing the toe characteristic for the lateral force,

7 is a view of a vehicle provided with a rear semitrailing arm bush of the vehicle of the present invention.

A schematic diagram showing the occurrence of the toe-in phenomenon at the time of turning.

<Explanation of symbols for the main parts of the drawings>

100: rear semi-trailing arm 110: drive shaft

120: stabilizer 130: tire

140: vertical reduction gear 150: holder

200: subframe 210: bracket

220: fastening means 300: bush

An embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 5 is a cross-sectional plan view showing a rear semitrailing arm bush of a vehicle of the present invention, and FIG. 6 is a diagram showing a tow characteristic of a lateral force of a suspension device having a rear semitrailing arm bush of a vehicle of the present invention. Fig. 7 is a schematic diagram showing occurrence of a toe-in phenomenon at the time of turning on a vehicle provided with a rear semi-trailing arm bush of the vehicle of the present invention.

As shown in FIGS. 1 and 5, the rear semitrailing arm bush of the vehicle of the present invention is positioned in the holder 150 of the rear semitrailing arm 100 to move the rear semitrailing arm 100 to the subframe 200. ), The inner side is eccentrically toward the front and the outer side is eccentrically configured to consist of a cylindrical bush 300 formed at an angle so as to be eccentrically toward the rear.

At this time, the bush 300 is fastened through the fastening means 220 to the bracket 210 provided in a straight line in the subframe 200.

Hereinafter, the operation of the present invention will be described with reference to FIGS. 1 and 5 to 7.

The rear semitrailing arm bush 300 of the vehicle of the present invention configured as described above is located in the holder 150 of the rear semitrailing arm 100, as shown in FIGS. 1 and 5, and the inner side thereof faces forward. Eccentrically, the outer side is made of a cylindrical elastic material eccentrically toward the rear, and is fastened through the bracket 210 and the fastening means 220 fixed to the subframe 200, thereby serving the rear semi-trailing arm 100 The frame 200 is elastically supported.

Accordingly, as shown in FIG. 1, when the vehicle is turned, the lateral force is applied to the rear semitrailing arm 100 from the outside of the vehicle to receive a load in a counterclockwise direction, and thus the outside of the rear semitrailing arm 100. The bush 300 provided in the holder 150 formed at the end receives a force to move backwards, and the bush 300 provided in the holder 150 formed inside the rear semitrailing arm 100 moves forward. You will be empowered to do so.

At this time, as shown in Figure 5, the bush 300 provided in the outer holder 150 of the rear semi-trailing arm 100 by the inner shape of the bush 300 to the rear by 2 l by its own shape Large deformation will occur, and the outer side will have a deformation as small as l / 2.

At the same time, the bush 300 provided in the inner holder 150 of the rear semi-trailing arm 100 has a deformation larger by 2 l in the front and the outside in the front, and the inside is l / 2 forward. As little deformation occurs.

Therefore, the rear semi-trailing arm 100 is tow by 3 l / 2 in the clockwise direction due to the shape change of the bush 300 as described above.

As a result, as shown in Figs. 6 and 7, when the vehicle is turning, the rear tires cause toe-out behavior, and the outer tires cause toe-in behavior, and the rear wheels of the vehicle as a whole are understeer. This occurs to improve the steering stability of the vehicle.

When this phenomenon is described in detail, a large angular deformation occurs in the inside and a small angular deformation occurs in the outside by the shape of the bush 300 as described above, thereby being fixed to the subframe 200 by the bush 300. The rear semi-trailing arm 100 receives the force to rotate in the clockwise direction as a whole, and moves the front of the tire 130 in the inward direction of the vehicle body, so that a toe-in phenomenon occurs to achieve the rear wheel's traction force. Increased steering stability

Accordingly, the rear semi-trailing arm bush of the vehicle of the present invention as described above is simply to shape the bush 300 for supporting the rear semi-trailing arm 100 to the vehicle body, the inner side to be eccentric toward the front of the vehicle, By changing the outer side to be eccentric toward the rear of the vehicle, the tire 130 is prevented by using different angular deformation amounts on the inner and outer sides generated by the shape of the bush 300 at the time of turning the vehicle, and at the same time, the tire 130 To be able to act as a toe.

The present invention as described above is to improve the rear semi-trailing arm bush of the vehicle to generate a toe-in behavior due to the change of the shape of the bush when the lateral force acts on the wheel to improve the grip of the rear wheel to improve the stability of adjustment and productability of the vehicle will be.

Claims (2)

Located in the holder of the rear semi-trailing arm to support the rear semi-trailing arm to the subframe, the inner side is eccentric toward the front and the outer side is eccentrically formed to form a certain angle so as to be eccentrically toward the rear, characterized in that Rear semitrailing arm bush of vehicle. The rear semi trailing arm bush of claim 1, wherein the bush is fastened through a fastening means to a bracket provided in a straight line in the subframe.