KR20040046786A - Yoke Clearance Adjusting Structure of Steering Apparatus for Automobile - Google Patents

Abstract

PURPOSE: A structure for regulating the yoke gap of a steering system for a vehicle is provided to accurately regulate the gap between a support yoke and a rack bar by applying a groove formed at a yoke cylinder and a stopper inserted into the groove, to improve work efficiency and to contribute automation of a line. CONSTITUTION: The structure for regulating the yoke gap of a yoke of a steering system for a vehicle is composed of a support yoke(4) slidingly installed in and a yoke plug(6) screw-combined to a yoke cylinder(2) of a rack housing(1), respectively; a spring(5) disposed between the support yoke and the yoke plug and compressed and extended in fastening or unfastening the yoke plug to regulate the gap of the support yoke for the rack bar; grooves(2a) formed on the wall of the yoke cylinder corresponding to the maximum fastening position of the yoke plug for compressing the spring to optimally approach the support yoke to the rack bar(3); and stoppers(7) for limiting the movement of the yoke plug in fastening the yoke plug inserted into the groove.

Description

Yoke Clearance Adjusting Structure of Steering Apparatus for Automobile}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steering apparatus of an automobile, and more particularly, to a yoke spacing adjusting structure of an automobile steering apparatus for adjusting a spacing of a support yoke, which is a member for pushing and supporting a rack bar toward a pinion gear side of a steering apparatus of an automobile. .

The steering system of the vehicle is provided to change the driving direction of the vehicle according to the driver's intention, and is connected to the steering wheel installed in the driver's seat, the steering shaft provided below and the steering shaft to adjust the power transmission direction. It consists of a gear box for switching.

In particular, the gear box includes a worm sector type, a worm sector roller type, a ball and nut type, a rack and pinion type, and the rack and pinion type gearbox includes a pinion gear and a pinion which are rotated by a driver's operating force. Power is transmitted to the wheel through the rack gear in close contact with the outer peripheral side of the gear.

Looking at the rack and pinion type in more detail, the input shaft is rotated to receive the rotational force generated by the driver inside the rotary valve installed in the housing of the gear box, the pinion shaft is installed to interlock. Corresponding to the pinion shaft is provided with a rack bar is formed with a rack gear that is meshed with the pinion gear of the pinion shaft.

In addition, a rack bar supporting device for elastically supporting the rack bar toward the pinion gear side is provided on the rear side of the rack bar, and the rack bar supporting device is provided on the rear side of the rack gear as shown in FIG. 1. A hollow yoke cylinder 2 integrally formed with the support yoke and a support yoke inserted into the yoke cylinder 2 so as to be slidable therein and having a semicircular groove formed so that one end is in close contact with the rear surface of the rack bar 3 ( 4) is included.

In addition, a coil-shaped spring 5 is provided at the rear side of the support yoke 4 so that the support yoke 4 can push the rack bar 3, and this spring 5 is provided at the outer end of the yoke cylinder 2. The yoke plug 6 supporting one end of the screw is screwed and fixed.

By the way, when adjusting the space | interval with the rack bar 3 of the support yoke 4, it is performed by adjusting the compression elongation state of the spring 5 by tightening the yoke plug 6 suitably, In the past, such a support yoke 4 The use of dial gauges to precisely space the gaps or depend on the operator's manual sensations has been a problem that not only takes a lot of time and reduces accuracy, but also hinders the automation of the line.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and an object thereof is to tighten the yoke plug within a limited range of preset dimensions in adjusting the spacing of the support yoke with respect to the rack bar. It is to provide a yoke spacing structure of an automotive steering device for allowing the spacing to be accurately adjusted.

1 is a cross-sectional view schematically showing the installation portion of the support yoke for supporting the rack bar in the prior art,

2 is a corresponding view of FIG. 1 to which a yoke spacing adjustment structure according to the present invention is applied;

3 is a front view showing a stopper used in the yoke spacing adjusting structure according to the present invention.

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

1: rack housing 2: yoke cylinder

2a: groove 3: rack bar

4: support yoke 5: spring

6: yoke plug 7: stopper

7a: hole

In order to achieve the above object, the yoke gap adjustment structure of the steering apparatus for a vehicle according to the present invention includes a support yoke and a screw plug coupled to the yoke cylinder of the rack housing, respectively, between the support yoke and the yoke plug. In the yoke spacing adjustment structure of the steering apparatus, the spring is interposed, the spring is compressed or extended according to the tightening or yoke plug to adjust the distance of the support yoke to the rack bar, the support yoke and the rack bar is optimal A groove is formed in the wall portion of the yoke cylinder that matches the maximum tightening position of the yoke plug for compressing the spring so as to be in a proximate state, and the groove is inserted with a stopper capable of restricting movement due to the tightening of the yoke plug. It is characterized by.

Here, the stopper may be formed with a hole for inserting the tool.

Hereinafter, a preferred embodiment of the present invention will be described based on the accompanying drawings, the same reference numerals are given to the same parts as in Figure 1 for explaining the prior art, and the detailed description thereof will be omitted.

2 shows a yoke spacing adjusting structure according to the present invention, in which the support yoke 4 faces the rack bar 3 inside the yoke cylinder 2 integrally formed with the rack housing 1. It is provided so that it can slide with one side, and the yoke plug 6 screwed to the yoke cylinder 2 in line with this support yoke 4 is provided.

In addition, a spring 5 is interposed between the support yoke 4 and the yoke plug 6. When the yoke plug 6 is tightened or loosened, the spring 5 is compressed or extended to support the yoke 4. It is intended to be pushed towards or pulled from the rack bar 3.

In the rack bar support structure of such a steering apparatus, the yoke spacing adjusting structure according to the present invention is applied. The maximum tightening position of the yoke plug 6 for ensuring that the distance between the support yoke 4 and the rack bar 3 is in an optimum proximity state while the support yoke 4 is pushed toward the rack bar 3 side. The first feature is that the grooves 2a are formed in the inner wall surface portion of the yoke cylinder 2, which coincides with.

In addition, the present invention is characterized in that the stopper 7 capable of restricting such movement when the yoke plug 6 is tightened and moved is inserted into the groove 2a.

In particular, the stopper 7 may have a structure having an O-ring or other suitable cross section, and a hole 7a which is easy to be picked up by a tool so that an assembling operation may be more easily performed at both ends of the stopper 7. May be formed.

The yoke spacing adjusting operation by the yoke spacing adjusting structure according to the present invention described above is performed as follows.

First, the position of the groove 2a provided on the inner wall surface of the yoke cylinder 2 is formed in consideration of the optimum position of the support yoke 4 and the rack bar 3 as described above through a prior design. .

The grooves 2a formed in this way are picked up with holes 7a at both ends of the stopper 7 with a tool or the like and inserted into the grooves 2a of the yoke cylinder 2, and then the yoke plug ( 6) is arranged in line with the support yoke 4.

Then, by tightening the yoke plug 6 with a screwdriver, the spring 5 is compressed to the support yoke 4 side such that the support yoke 4 is brought close to the rack bar 3, at which time the yoke plug 6 As the movement of is stopped at the set position, i.e., the position in contact with the stopper 7, the compression of the spring 5 by the yoke plug 6 and further movement of the support yoke 4 are stopped.

As described above, according to the yoke spacing adjustment structure of the steering apparatus for automobiles according to the present invention, by applying a groove formed in the yoke cylinder and a stopper inserted into the groove, the distance between the support yoke and the rack bar can be simplified. Since it can be adjusted accurately, work efficiency is improved.

In addition, since the insertion of the stopper into the groove of the yoke cylinder and the tightening of the yoke plug do not require a separate measuring tool or operator's sense, there is an effect that contributes to the automation of the line.

Claims (2)

A sliding support yoke and a screwed yoke plug are respectively installed in the yoke cylinder of the rack housing, and a spring is interposed between the support yoke and the yoke plug, and the spring is compressed or extended according to the yoke plug or the width of the rack. In the yoke spacing adjustment structure of the steering apparatus in which the spacing of the support yoke with respect to the bar is adjusted, Grooves are formed in wall portions of the yoke cylinders that coincide with the maximum tightening positions of the yoke plugs for compressing the springs so that the support yokes and the rack bars are in close proximity, and the grooves are moved according to the tightening of the yoke plugs. Yoke gap adjustment structure of the steering apparatus for a vehicle, characterized in that the stopper is inserted that can limit the. The method of claim 1, Yoke gap adjustment structure of the steering apparatus for a vehicle, characterized in that the stopper is formed in the stopper to insert a tool.