KR19980078548A - Shock absorbing structure of the steering shaft - Google Patents

Abstract

The present invention relates to a shock absorbing structure of a steering shaft for changing the direction of movement of the vehicle to any arbitrary, and is fixed to the vehicle body with a bolt, the support bra which is formed in the center with a slit groove formed in the transverse direction parallel to the steering shaft Ketwa; A fixed bracket which is fixed on an outer circumferential surface of the steering shaft and protrudes toward the support bracket, and has a through hole formed at an upper end thereof; A fixing pin coupled through the support bracket slit groove and the through hole of the fixing bracket; A shock absorbing structure of a steering shaft is provided, comprising a shock absorbing bar interposed in a state coupled to a fixing pin between a support bracket and a contact surface of the fixing bracket.

Description

Shock absorbing structure of the steering shaft

The present invention relates to a steering column shaft connected to a steering wheel, which is a vehicle steering apparatus, and more particularly, to a shock absorbing structure of a steering shaft formed to absorb shock from the outside.

In general, the steering device of a vehicle refers to a device for changing the traveling direction of the vehicle to an arbitrary, and is composed of three structures: an operation mechanism, a gear mechanism, and a link mechanism. First, the operation mechanism is a part which the driver directly steers and transmits the operation force to the gear mechanism, and is composed of a steering wheel, a steering column shaft, and the like. The gear mechanism is a gear mechanism fixed to the frame that increases the operating force by reducing the rotation of the steering shaft and at the same time changes the direction of movement of the operating mechanism to transmit to the link mechanism. Next, the link mechanism is a part which transmits the movement of the gear mechanism to the front wheel and at the same time maintains the relation position of the right and left wheels, and is composed of a pitman arm, a drag link, a knuckle arm and a tie rod.

Meanwhile, among the steering mechanisms, the steering column shaft, as described above, transmits the steering force of the steering wheel to the steering gear, and the steering wheel is provided at the top and the steering gear is installed at the bottom, and the impact from the outside is applied. In the case of losing, a part of the column tube is made in a net shape so that deformation occurs in the longitudinal direction to absorb shocks.

In addition to the above-described structure, a steering shaft in which the steering column shaft is fixed to the vehicle body in the state where an intermediate shaft is interposed between the steering column shaft and the steering gear is used as shown in FIG. 1.

As shown, the steering shaft 1 is coupled to the lower intermediate shaft 2 by a coupling structure of a universal joint type, and the gear box 3 is connected to the lower end of the intermediate shaft 2. . In addition, the steering shaft (1) is coupled to the vehicle body to the support bracket (5) fixed to the vehicle body (4), look at the coupling relationship with the vehicle body 4 in detail as follows.

As shown in FIG. 2, first, a U-shaped support bracket 5 for supporting the steering shaft 1 is fixed to the vehicle body 4 by bolts, and an open end of the support bracket 5 is fixed. Is coupled with the steering shaft 1. In addition, a fixed bracket 6 is attached to the outer circumferential surface of the steering shaft 1, and a space portion with a predetermined interval is formed between the fixed bracket 6 and the outer circumferential surface of the steering shaft 1. In addition, the space portion is equipped with a shock absorbing member 7 formed with the elongated flat member overlapped, one end of the overlapping member is inserted into the space portion, the other end is the upper portion of the fixing bracket 6 When the impact is applied to the steering shaft 1 by being located on the surface, the impact is absorbed by the surface contact between the shock absorbing member 7, the fixed bracket 6, and the outer circumferential surface of the steering shaft 1.

By the way, in the structure of the conventional steering shaft, the shock absorbing member provided on the steering shaft has a problem that the correction of the impact value is difficult by using the shock absorbing method by surface contact.

Accordingly, the present invention has been proposed to solve such a conventional problem, and an object of the present invention is to provide a shock absorbing structure with a new structure, thereby improving impact value correction in cases such as a light collision of a vehicle.

1 is a side view showing a conventional steering shaft structure.

2 is an enlarged view of FIG. 1.

Figure 3 is a side cross-sectional view showing the structure of a steering shaft according to the present invention.

4 is a front view of the steering shaft shown in FIG.

Explanation of symbols for the main parts of the drawings

One ; Steering shaft 2; Bowler shaft

3; Gearbox 4; Body

8 ; Support bracket 9; Slit groove

10; Fixed bracket 11; Retaining pin

In order to achieve the above object, the present invention, the support bracket is fixed to the vehicle body with a bolt, the center has a slit groove formed in the transverse direction parallel to the steering shaft; A fixed bracket which is fixed on an outer circumferential surface of the steering shaft and protrudes toward the support bracket, and has a through hole formed at an upper end thereof; A fixing pin coupled through the support bracket slit groove and the through hole of the fixing bracket; A shock absorbing structure of a steering shaft is provided, comprising a shock absorbing bar interposed in a state coupled to a fixing pin between a support bracket and a contact surface of the fixing bracket.

In addition, the fixing bracket is formed to have a U-shaped cross section and is fixed in a state in which the supporting bracket is inserted between the open ends, and thus the contact brackets of the shock absorbing bar and the supporting bracket are formed on both sides. It is preferable to interpose.

In addition, the shock absorbing bar is preferably an elastic member having a shape in which two M-shapes are connected to each other.

Example

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the present invention, the same reference numerals are assigned to the same parts as those cited in the prior art, in the present embodiment, to avoid duplication of description again Do not explain.

3 is a side cross-sectional view illustrating a structure of a steering shaft according to the present invention, and FIG. 4 is a front view of the steering shaft shown in FIG. 3.

First, as shown in FIG. 3, according to the shock absorbing structure of the steering shaft according to the present invention, a support bracket 8 for supporting the steering shaft 1 is coupled to the vehicle body 4 by bolts. In the center of the support bracket 8, a slit-shaped groove 9 formed in the transverse direction in parallel with the steering shaft 1 is formed. In addition, on the outer circumferential surface of the steering shaft 1, a fixed bracket 10 for fixing with the support bracket 8 is fixedly attached, and the fixed bracket 10 is slit-shaped in the support bracket 8. Through holes corresponding to the grooves 9 are formed to be coupled to each other by the fixing pin 11.

In addition, according to the present invention, between the support bracket 8 and the fixed bracket 10 coupled to each other by the fixing pin 11 is provided with a shock absorbing bar 12 of the shape of the two M is connected to each other. .

On the other hand, Figure 4 is a front view of the steering shaft coupling structure shown in Figure 3, as shown, the fixed bracket 10 is formed in a U-shape is supported bracket 8 between the open end 8 ) Is fixed in the inserted state, and is interposed on both contact surfaces of the fixed bracket 10 and the support bracket 8 of the shock absorbing bar 12.

By this configuration, when the steering shaft 1 is moved along the axis line by the impact, the fixing pin 11 coupled to the fixing bracket 10 is the slit groove 9 of the support bracket 8. When moved to the left and right along this, at this time, while the shock absorbing bar 12 supported by the fixing pin 11 between the support bracket 8 and the fixed bracket 10 is elastically deformed, It will absorb the shock.

As described above, according to the shock absorbing structure of the steering shaft according to the present invention, when an impact is applied to the steering shaft, the shock is absorbed by a pair of shock absorbing bars interposed between the fixed bracket and the support bracket. By doing so, it is easy to correct the impact value such as when the vehicle is lightly impacted.

On the other hand, the present invention is not limited to the above-described specific preferred embodiment, and any person having ordinary skill in the art to which the invention belongs without departing from the gist of the invention claimed in the claims, various changes Would be possible.

Claims (3)

A support bracket fixed to the vehicle body by a bolt and having a slit-shaped groove formed in a transverse direction in parallel with the steering shaft; A fixed bracket which is fixed on an outer circumferential surface of the steering shaft and protrudes toward the support bracket, and has a through hole formed at an upper end thereof; A fixing pin coupled through the support bracket slit groove and the through hole of the fixing bracket; And a shock absorbing bar interposed in engagement with the fixing pin between the support bracket and the contact surface of the fixed bracket. According to claim 1, wherein the fixing bracket is formed to have a U-shaped cross section is fixed in a state in which the support bracket is inserted between the open end portion, accordingly fixed bracket and the support bracket of the shock absorbing bar Shock absorbing structure of the steering shaft characterized in that interposed on both contact surfaces of the. The shock absorbing structure of claim 1 or 2, wherein the shock absorbing bar is an elastic member having two M-shaped shapes connected to each other.