KR19990035386A - Coil Spring Structure of Automobile Suspension - Google Patents

Abstract

The present invention relates to a suspension device for an automobile, and in particular, to prevent the occurrence of a joint during compression of the coil spring due to the damping action.

In order to achieve the above object, the present invention attaches rubber to the upper seat surface of each coil of the coil spring of the automobile suspension.

Description

Coil Spring Structure of Automobile Suspension

The present invention is to prevent the occurrence of noise in the compressed state of the coil spring during the damping operation of the suspension of the vehicle.

A typical vehicle suspension system is a device that connects the frame and the axle to support the middle of the vehicle, absorbs the vibration of the wheel, and installs a part of the steering mechanism. That is, when driving, the axle does not directly transmit vibrations or shocks received from the road surface to prevent damage to the vehicle body or cargo, improve ride comfort, and apply the driving force generated on the driving wheel or the braking force of each wheel to the vehicle body during braking. Simultaneously with transmission, it resists centrifugal force during line drawing and supports each wheel in the correct position with respect to the body.

Therefore, the suspension system needs to be coupled up and down to alleviate the impact from the road surface, and strong coupling is required in the horizontal direction to withstand driving force, braking force and centrifugal force when turning. .

Suspensions having the above functions and purposes are classified into front suspensions and rear suspensions, and again, the front suspensions and the rear suspensions are divided into axle suspensions and independent suspensions. Because of its simplicity, it is widely used in large trucks and buses, and the independent suspension type can lower the height of the car, which improves the safety of the car and the light weight under the spring.

In addition, there are Wishbone type, McPherson type, and trailing arm type.

Suspension devices, which are classified as described above, have a slight difference in structure, but the basic structure and purpose thereof are the same. Thus, a description of a whisbone suspension device, which is a typical suspension device for a passenger car, is as follows.

First, the structure of the upper and lower two control arms, that is, the upper control arm (1) and the lower control arm (2) is installed on the cross member (3) by the shaft (not shown), the lower control arm (2) and the upper control The end of the arm 1 is coupled to a steering knuckle 5 which makes a rotary motion for steering up and down by means of a bowl joint 4.

A coil spring 7 is provided between both ends of the lower control arm 2 and the cross member 3, and the lower control arm 2 and the upper control arm 1 are inserted through the inner diameter of the coil spring 7. There was a shock-over (8) fixed at both ends.

The coil spring 7 has a structure in which a plurality of annular coils 7 'having the same diameter "d" are connected in a spiral shape, and in the state where no external force is applied, the coils 7' are spaced up and down "c Is keeping up.

Reference numeral 6 is a wheel.

The steering device configured as described above has the impact of the road surface while driving the coil through the knuckle arm 5 and the upper control arm 1 and the lower control arm 2 which are ball jointed with the knuckle arm 5 at the wheel 6. When the spring 7 and the shock absorber 8 are transmitted, the coil spring 7 and the shock absorber 8 are compressed and returned as shown by arrows "a" and "b" due to the impact of the road surface. The shock transmitted to the cross member 3 and the vehicle body was damped.

In more detail, the impact of the road surface transmitted to the coil spring 7 is converted into the up and down kinetic energy of the coil spring 7, and the up and down kinetic energy is converted into thermal energy and released to the outside.

In addition, the shock absorber 8 rapidly compresses when the coil spring 7 is compressed and gradually acts as it increases, thereby alleviating the impact of the road surface like the coil spring 7 and damping vibration of the coil spring 7. It was.

However, when the coil springs are compressed at intervals "c", the coils are in contact with each other up and down, and at this time, there is a problem in that the metal springs occur in the coil springs.

In addition, there is a problem that a groove is dug into some coils due to a difference in relative surface strength when the coils are in contact, and a notch phenomenon occurs in the grooves, thereby easily breaking the coil spring.

Therefore, in view of the above problem, the present invention is provided with the upper control arm and the lower control arm installed on the cross member by the shaft, and the ends of the lower control arm and the upper control arm are rotated for steering with the vertical motion by the ball joint. It is coupled to a steering knuckle, and between the lower control arm and both ends of the cross member is installed a coil spring connected in a spiral shape a plurality of coils, the inner end of the coil spring is inserted into both ends of the lower control arm and the upper control arm In the suspension of the same vehicle comprised of this fixed shock-over,

By coating the surface of the upper sheet surface of each coil with rubber, the coils are not directly contacted when the coil springs are compressed due to the damping action of the suspension device, thereby preventing the occurrence of joints due to the compression of the coil springs. It is to be done.

1 is a configuration diagram of a suspension of a typical vehicle,

(A) is a section,

(B) is a perspective view of a coil spring.

Figure 2 shows the configuration and mounting of the present invention,

(A) is a section,

(B) is E-E sectional drawing.

*** Explanation of symbols for main parts of drawing ***

107: coil spring 107 ': coil

109: Rubber 110: Home

111: turning

In the present invention, as shown in (a) and (b) of FIG. 2, the upper control arm 101 and the lower control arm 102 are installed on the cross member 103 by an axis (not shown). The ends of the control arm 102 and the upper control arm 101 are coupled to a steering knuckle 105 which makes a rotary movement for steering up and down by the bowl joint 104 and crosses the lower control arm 102. Between both ends of the member 103, a plurality of annular coils 107 'having the same diameter are spirally connected in a spiral shape at regular intervals up and down, and the inner diameter of the coil spring 107 is inserted into the lower portion. In the suspension of the vehicle comprising a control arm 102 and a shock absorber 108 fixed at both ends to the upper control arm 101,

The rubber 109 was attached to a part of the upper sheet surface of each coil 107 '.

In addition, a plurality of grooves 110 are formed on the upper sheet surface of the coil 107 ′ to facilitate the detachment of the rubber 109, and a protrusion 111 press-fitted into the groove 110 is formed on one surface of the rubber 109. Formed on.

Reference numeral 106 is an automobile wheel.

According to the present invention configured as described above, the impact of the road surface while driving is coiled through the upper control arm 101 and the lower control arm 102 in which the knuckle arm 105 and the knuckle arm 105 and the ball joint 104 are wheeled at the wheel 106. When the spring 107 and the shock absorber 108 are transmitted, the coil spring 107 and the shock absorber 108 are compressed and returned to the cross member 103 and the vehicle body by the impact of the road surface. Dampening shock.

That is, the shock absorber 108 acts rapidly when the coil spring 107 is compressed, and gradually acts as it increases, thereby alleviating the impact of the road surface like the coil spring 107 and at the same time as the vibration of the coil spring 107. Attenuation, the impact of the road surface transmitted to the coil spring 107 is converted to the up and down kinetic energy of the coil spring 107 and the up and down kinetic energy is converted to thermal energy is released to the outside.

At the time of compression of the coil spring 107, the coils 107 'which are kept at regular intervals up and down are brought into close contact with each other up and down.

In this case, the coil 107 'is prevented from directly contacting the surface by the rubber 108 coated on the surface, thereby preventing the occurrence of metallic joints.

In addition, the rubber 108 is attached to the upper sheet surface of the coil 107 'in a state in which the protrusion 111 is pressed into the groove 110, and on the contrary, by removing the protrusion 111 from the groove 110, The rubber 109 can be easily separated from the coil 107 '.

As described above, the present invention attaches rubber to the upper surface of each coil of the damping coil spring of the automobile suspension, thereby preventing the occurrence of metallic joints during the compression of the coil spring, and improving the cushioning effect and durability of the coil spring. There is an effect that can be improved.

Claims (2)

The upper control arm 101 and the lower control arm 102 are installed on the cross member 103 by an axis (not shown), and the lower control arm 102 and the end of the upper control arm 101 are connected to a bowl joint ( 104 is coupled to a steering knuckle 105 which rotates in order to steer up and down by means of a plurality of coils. Coil spring 107 connected to each other is installed, and the shock-absorber 108 of both ends is fixed to the lower control arm 102 and the upper control arm 101 by inserting the inner diameter of the coil spring 107. In suspension, Rubber spring structure of the vehicle suspension, characterized in that the rubber 109 is attached to the upper seat surface of each coil (107 '). The method of claim 1, A plurality of grooves 110 are formed in the upper seat surface of the coil 107 ′, and a vehicle suspension device is formed on one surface of the rubber 109 with protrusions 111 pressed into the grooves 110. Coil spring structure.