KR0168535B1 - Tilt apparatus of a steering shaft - Google Patents

Abstract

The present invention relates to a vehicle steering shaft tilt device for adjusting the steering wheel, and is provided in a steering shaft support bracket having a flange mounted on the vehicle steering shaft and fixed to an instrument panel, the housing integrally formed under the bracket. Hydraulic apparatus having a reciprocating piston rod, the upper end of the steering shaft is pivotally mounted to the front end of the bracket and the steering wheel is mounted on the upper end, the bracket is mounted to the lower end of the upper end of the steering shaft connected to the piston rod of the hydraulic device The driver can easily adjust the steering wheel position according to the physical condition.

Description

Vehicle Steering Shaft Tilt Device

1 is a schematic perspective view of a manual tilt device of a conventional vehicle steering shaft.

2 is a partial cross-sectional view for explaining the operation of the first tilt device.

3 is a perspective view of a state in which the tilt device is employed in the steering shaft according to the present invention.

4 is a hydraulic circuit diagram of the tilt device of FIG.

5 is a partial cross-sectional view of a steering shaft and a column cover employing the tilt device of the present invention.

6 is a side view showing the excretion position of the tilt switch operating switch of FIG.

7 is a partial cross-sectional view taken along line A-A of FIG.

* Explanation of symbols for main parts of the drawings

20: column 21: steering shaft

23: bracket 24: steering shaft upper portion

26: motor 27: pump

28: cylinder 29: piston rod

30: piston 31, 32: first and second chamber

33,33 ': Check valve 34: Directional control valve

35 switch 36 solenoid

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tilting device of a steering shaft for mounting a steering wheel of a vehicle, and more particularly to a steering shaft tilting device for electrically adjusting a steering wheel to a suitable position according to the height of a driver.

Conventionally, as shown in FIG. 1, the joint part 2 is formed at the lower end of the steering shaft 1, and it is attached to the bracket 4 which supports the column 3 of the steering shaft 1 in a tiltable manner. The entire steering shaft 1 is tilted up and down by the tilt lever 5 thus adjusted to adjust the angle. The bracket 4 is bolted to the vehicle body or the instrument panel.

A manual tilt device configuration for adjusting the tilt angle by the tilt lever 5 as described above is as shown in FIG. The bracket 4 supporting the column 3 incorporating the steering shaft 1 is bent to form a recess and a flange 6 extending to both sides of the upper end is formed and fixed to the instrument panel. The column (3) is disposed on the bracket (4) in the upper groove portion, the column (3) is disposed on the support pin (9), the support pin (9) having a support surface protruding from the lower hole (8) formed on both sides of the bracket (4) and movably disposed. It is to be supported at the bottom of 3). The tilt lever 5 is integrally fixed to both sides of the support pin 9 so that the tilt lever 5 is rotatably mounted, and the handle 10 is mounted at the end thereof.

In the state in which the handle 12 is disposed in a horizontal state in a virtual line in FIG. 2, the support pin 9 is disposed at the upper end of the long hole 8, and the support pin 9 is positioned at the bottom of the bracket and supported by a solid line in the drawing. As shown by the driver, when the driver lowers the handle 12, the protruding support surface of the support pin 9 of the tilt lever 5 is rotated with respect to the bottom of the bracket so that the support pin 9 is lowered from the long hole to the lower position. Thus, the column 3 supported by the support pin 9 is also tilted about the joint part 2 at the lower end thereof so that the position of the steering wheel on the upper side is downward.

Therefore, when adjusting the steering wheel position, the driver had to directly lift the heavy steering wheel to the proper position and had to handle the handle 10 of the tilt lever 5 with the other hand.

In addition, the tilt lever 5 must be positioned in the middle of the column 3 because the driver needs to operate it by hand, while the joint part 2, that is, the tilt point, is positioned at the lower end, and thus the tilt angle is large and heavy steel. The driver is forced to rotate the entire steering shaft 1 formed.

In addition, since the handle 10 of the tilt lever 5 needs to be rotated, there is a problem of protruding to the outside of the column cover 13 and being exposed to the outside.

The present invention was devised to solve the problems caused by the manual tilting apparatus of the vehicle described above. The steering shaft tilt angle can be manipulated by a switch disposed on the column cover to facilitate the driver's tilt angle adjustment, and the column including the steering shaft It is an object of the present invention to provide a vehicle steering shaft tilt device that is completely concealed by a cover to clean the exterior.

The vehicle steering shaft tilt apparatus according to the present invention is mounted on the vehicle steering shaft and a steering shaft support bracket having a flange fixed to an instrument panel,

Hydraulic device provided in the housing integrally formed under the bracket and having a reciprocating piston rod,

A steering shaft upper end portion rotatably mounted to the front end of the bracket and mounted with a steering wheel at an upper end thereof;

It is configured to include a bracket mounted to the lower end of the steering shaft upper end connected to the piston rod of the hydraulic device.

Hereinafter, with reference to the accompanying drawings showing an embodiment of the present invention will be described in detail the present invention.

In FIG. 3, the bracket 23 having the flanges 22 formed on both sides is integrally mounted on the steering shaft 21 embedded in the column 20. The upper end part 24 of the steering shaft mounted on the upper end of the steering wheel is pivotally mounted to the front end of the bracket 23 by the pin 25. The lower portion of the bracket 23 is a hydraulic unit is integrated with a pump 27 driven by a motor 26 and a piston 28 and a piston rod 29 reciprocally mounted in the cylinder 28 and the cylinder 28, The hydraulic device is constructed as shown in the hydraulic circuit diagram of FIG.

The free end of the reciprocable piston rod 29 is connected to a bracket 23 fixed to the upper end 24 of the steering shaft such that the upper end 24 of the steering shaft counterclockwise from the pin 25 when the piston rod 29 is advanced. The steering wheel is rotated upward to adjust the position of the steering wheel. When the piston rod 29 is retracted, the upper end portion 24 of the steering shaft rotates clockwise to lower the steering wheel.

Adjusting the vertical position of the steering wheel as described above will be described in detail with reference to the hydraulic circuit diagram of FIG.

The cylinder 28 is partitioned into two chambers 31 and 32 by a piston 30 reciprocating therein, the chambers 31 and 32 being directional control with check valves 33 and 33 '. It communicates with the discharge port of the pump 27 driven by the motor 26 via the valve 34. The direction control valve 34 is preferably a four-way three-position direction control valve 34 controlled by a solenoid. The motor 26 and the direction control valve 34 are operated by a switch 35 provided on one side of the column cover of the steering shaft.

The switch 35 is operated in up, down, and off positions. In the up position of the switch 35, the motor 26 and the pump 27 are driven, and at the same time, the first solenoid 36 is excited and the direction control valve ( 34, the pressure oil discharged from the pump 27 flows into the chamber 31 while the pressure oil discharged from the pump 32 is discharged into the reservoir 37 as it is switched to the position on the left side of FIG. Accordingly, as the piston 30 moves to the right side in the drawing, the piston rod 29 is advanced to rotate the upper end portion 24 of the steering shaft upward.

In the downward position of the switch 35, the motor 26 and the pump 27 are driven and at the same time the second solenoid 38 is excited, and the direction control valve 34 is switched to the right position and discharged from the pump 27. As the pressure oil flows into the chamber 32 and the pressure oil of the chamber 31 is discharged into the reservoir 37, the piston 30 moves to the left side in the drawing so that the piston rod 29 retreats to the upper end 24 of the steering shaft. Rotate downward.

The off position of the switch 35 is electrically off so that the motor 26 and the pump 27 are stopped and the direction control valve 34 is also in the neutral position in the drawing by the spring so that the flow path is locked so that the piston 30 And the position of the rod 29 is fixed.

The check valves 33 and 33 'provided between the directional control valve 34 and the chambers 31 and 32 are preferably pilot check valves for internal pressure leakage and circuit locking.

Therefore, when the driver wants to adjust the steering wheel downward, when the switch 35 is placed in the downward position, the piston rod 29 retreats and the upper end 24 of the steering shaft rotates clockwise, so that the upper end 24 of the steering shaft 24 is rotated clockwise. When the steering wheel fixed at the end is turned down and the switch 35 is turned off at a suitable position, the hydraulic circuit is locked even if the motor 26 and the pump 27 are not driven continuously and the piston 30 stops in the cylinder. Since the piston rod 29 is also stopped, the upper end 24 of the steering shaft and the steering wheel are maintained in the adjusted state. According to the present invention, even if the driver uses the pilot check valves 33 and 33 'for the hydraulic circuit for a long time without adjusting the steering wheel position, internal leakage of the hydraulic oil does not occur, so the steering wheel position is maintained without change.

Thus, the steering shaft tilt device according to the present invention does not require a tilt lever to be directly operated by a driver, and the hydraulic device can be manufactured in a small size, so that the exterior can be cleanly disposed in the column cover 39 as shown in FIG. .

In addition, since the tilt point is located above the steering shaft according to the present invention, it is possible to accurately adjust the tilt angle without deviation compared to the conventional tilt point located at the bottom of the steering shaft. Moreover, the operation and control of the hydraulic system for the tilting device operation of the present invention is possible by the switch 35 which is adjusted to the up and down position and the down position and the off position in the on state, and the switch 35 is shown in FIG. As can be arranged on one side of the column cover 39, the driver can easily and accurately adjust the steering wheel position.

FIG. 7 is a view illustrating a state in which the column cover 39 is disposed. The cover 40 of the switch 35 has a jaw 41 of an elastic material having a jaw and a jaw of the claw 41. (39) A support member 42 supporting at the surface is formed and the flow path is closed in the direction control valve 34 to stop the piston rod 29 in the up and down positions and the piston rod 29 is moved forward and backward. And a pivotable 43 pivotable to an off position to maintain the condition.

Claims (1)

When the upper end portion 24 of the steering shaft is connected to the piston rod 29 of the hydraulic system installed on the support bracket 23 mounted on the steering shaft 21, the inside of the cylinder 28 of the hydraulic system is piston. The direction control valve 34 and the check valve which are divided into the first chamber 31 and the second chamber 32 which are divided by the 30, and are controlled by the solenoid 36 in each chamber 31 and 32, 33) (33 ') vehicle steering shaft tilt device, characterized in that for selectively supplying the hydraulic pressure pumped to the cylinder (28).