KR100303032B1 - Upper arm ball joint of wheel mounting unit for vehicle - Google Patents

Abstract

PURPOSE: An upper arm ball joint of a wheel mounting unit in a vehicle is provided to control a slant angle of a cam member and a king pin and to improve productivity by controlling wheel aliment. CONSTITUTION: An upper arm ball joint of a wheel mounting unit comprises a ball(12) inserted to a socket(13) by being mounted on a side portion of a ball rod(11); a ball joint housing(14) attached to a circumference of the socket; a groove(19) formed on a circumference of the ball joint housing; a cam member(15) inserted to the groove; and a snap ring(18) inserted to a lower end portion of the groove. The cam member is rotated by being attached to the groove of the ball joint housing. Thereby, the upper arm ball joint of the wheel mounting unit controls a slant angle of the cam member and a king pin. Moreover, the upper arm ball joint of the wheel mounting unit improves productivity by controlling wheel aliment.

Description

Upper arm ball joint of car wheel mount

The present invention relates to an upper arm ball joint of an automobile wheel mount, and more particularly, to an upper arm ball joint of an automobile wheel mount that enables adjustment of wheel alignment by applying a cam member to an upper arm ball joint.

Wheel alignment is a wheel alignment that maintains the position, direction, and correlation of the wheels mounted on the vehicle. When this wheel alignment is not properly maintained, it causes driving instability or tire wear. As the front barque is steered, special wheel alignment is required.

The front wheels are steered so that they can be turned left and right around the steering knuckle and king pin. The front wheel alignment consists of four elements: camber angle, king pin inclination angle, toe-in and caster. This requires turning radials to prevent the wheel from causing side slip when the handle is broken.

When the front wheel is seen from the front, it is installed obliquely to the outside, and the angle made by the center line of the wheel and the vertical line to the road surface is called a camber, and the purpose of placing the camber is to prevent the front wheel from being opened by the load, and the wheel while driving To prevent the falling out, to facilitate the handle operation with the kingpin inclination angle, and to reduce the force to bend the spindle or knuckle.

When the front wheel is seen from the front, the upper part of the kingpin is inclined inward. The angle formed by this and the vertical line with respect to the road surface is called the king-pin angle, and the purpose of the kingpin inclination is to reduce steering force and drive And to reduce the impact during braking, and to increase the restoring force of the handle.

However, until now, the upper arm ball joint and the lower arm ball joint, which determine the two wheel alignments of the camber angle and the kingpin inclination angle, are fixed, and thus the camber angle and the kingpin inclination angle cannot be changed.

The present invention has been made in view of the above problems of the conventional upper arm ball joint, and its object is to provide an upper arm ball joint having a structure capable of adjusting the camber angle and the kingpin inclination angle.

In order to achieve the above object, the upper arm ball joint of an automobile wheel mounting portion provided according to the present invention has a ball rod formed at one end and a threaded portion at the other end, a socket into which the ball of the ball rod is inserted, a ball and a socket And a ball joint housing having a groove formed therein, a cam member inserted into the groove of the ball joint housing, and a dust cover provided around the ball rod, wherein a snap ring is fitted between the dust cover and the cam member.

1 is a cross-sectional view showing the vehicle wheel mounting portion

Figure 2 shows the upper arm ball joint of the vehicle wheel mounting portion according to the present invention

Cross-section

Figure 3 is a ball join in the upper arm ball joint of the vehicle wheel mounting according to the invention

Schematic showing center trajectory of the track

Figure 4 is a cam member in the upper arm ball joint of the vehicle wheel mounting portion according to the present invention

Perspective view

* Explanation of symbols for the main parts of the drawings

1: wheel 2: steering knuckle

3,10: upper arm ball joint 4: upper suspension arm

5: lower arm ball joint 6: lower suspension arm

7: shock absorber 8: nut

11: ball loaded 12: ball

13 socket 14 housing

15 cam member 16 threaded portion

17: dust cover 18: snap ring

19: home

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

As shown in FIG. 1 showing the structure of the automobile wheel mounting portion in cross section, the steering knuckle 2 mounted to the automobile wheel 1 is connected to the upper suspension arm 4 through the upper arm ball joint 3, It is connected to the lower suspension arm 6 via the lower arm ball joint 5.

The ball joint combines the up and down movement of the suspension arm and steering knuckles and the rotating bearing of the knuckle when the handle is bent, and the upper arm ball joint acts only as a pivot rather than supporting the weight of the vehicle.

A shock absorber 7 is mounted between the upper suspension arm 4 and the lower suspension arm 6 to absorb shocks.

An enlarged upper arm ball joint 10 according to the invention is shown in FIG. 2, which corresponds to the upper arm ball joint 3 of the structure of the automobile wheel mounting of FIG. 1. .

As shown in FIG. 2, in the upper arm ball joint 10 according to the present invention, a ball 12 formed at one end of the ball rod 11 is inserted into the socket 13, and the circumference of the socket 13 is shown. The ball joint housing 14 is attached to accommodate the assembly of the ball 12 and the socket 13.

In addition, a groove 19 is formed around the ball joint housing 14, and the cam member 15 is inserted into the groove 19, and the snap ring 18 is fitted at the lower end thereof, whereby the cam member ( 15 is rotatable while being in close contact with the groove 19 surface around the ball joint housing 14 while preventing removal in the vertical direction.

As shown in Figs. 3 and 4, the cam member 15 has a center of its inner diameter coinciding with a ball joint center A, but a center B of its outer diameter, i.e., a cam center from a ball joint center A. Eccentric

Accordingly, the cam member 15 can move while drawing the trajectory C as shown in FIG.

The ball rod 11 has a threaded portion 16 formed at the other end thereof so that the steering knuckle 2 is fitted to the ball rod 11 and fixed with a nut 8 as shown in FIG. 1.

In addition, a dust cover 17 is provided around the ball rod 11 to protect the ball joint from dust and other foreign matter, and a snap ring between the dust cover 17 and the cam member 15. (18) is fitted and the cam member 15 is firmly supported.

The upper arm ball joint of the present invention configured as described above is provided with a cam member 15 inside the ball joint, so that the cam member 15 moves while drawing the trajectory C as shown in FIG. Therefore, the angle of camber and kingpin can be adjusted.

As described above, the present invention can adjust the camber and the kingpin inclination angle by installing the cam member in the upper arm ball joint, so that the wheel alignment can be adjusted, thereby improving the productability.

Claims (1)

A ball rod having a ball formed at one end and a thread formed at the other end thereof, a socket into which the ball of the ball rod is inserted, a ball joint housing accommodating the ball and the socket of the ball rod, and having a groove formed around the ball rod; In the upper arm ball joint of the vehicle wheel mounting portion comprising a dust cover installed around the ball rod, the lower end is supported by a snap ring that is fitted into the groove of the ball joint housing and the bottom is fastened to the ball joint housing, The upper arm ball joint of claim 1, wherein the center of the inner diameter coincides with the center of the ball joint and the center of the outer diameter further comprises a cam member eccentric with the center of the ball joint.