KR20090064176A - Steering column lock apparatus of vehicle - Google Patents

Abstract

A steering column lock device of a vehicle is provided to reduce manufacturing cost by maintaining robbery prevention function although a lock bar is made of an expensive material reacting to magnetic force. A steering column lock device of a vehicle includes the followings: a worm(3) rotated by a motor; a worm gear(5) engaged with the worm; an operating cam(7) consisting of a helical cam curve having a diameter extended from the rotational center to the outside; a lock bar(9) slid to a vertical direction of a rotating shaft of the warm gear; an operating pine(11) contacted on the cam curve of the operating cam; an operating spring(13) maintaining a contact state of the operating pin; a protect pin(15) protruded from the lock bar to the operating cam elastically; and a protect groove inserting the protecting pip to the inside the operating cam.

Description

Steering Column Lock Apparatus of Vehicle

The present invention relates to a steering column lock device of a vehicle, and more particularly, to a technique for preventing the steering column lock state from being released by an unauthorized magnetic force.

The steering column lock device of the vehicle prevents theft of the vehicle by fixing the steering shaft impossible to rotate during parking of the vehicle.

The steering column lock device as described above basically uses a mechanism for switching the rotatable state of the steering shaft by switching the state in which the rock bar protrudes toward the steering shaft and the recessed state.

By the way, the rock bar should be made of a material having a strong rigidity to be prepared for the force applied from the outside, and a cheap and representative material that can provide a strong rigidity is steel.

However, the rock bar made of steel as described above has a weak point that the magnetic body is attracted to the magnet is not suitable for use as a rock bar.

That is, there is a high possibility of releasing the locked state by an operation such as pulling a rock bar made of steel with a strong magnet or the like from the outside.

Therefore, in order to prepare for the magnetic force applied from the outside as described above, the rock bar had to be made of a nonmagnetic material. However, as described above, when the rock bar is made of a nonmagnetic material that provides strong rigidity, the cost is very high. have.

The present invention has been made to solve the problems described above, by preventing the release of the lock bar lock state by a magnetic force applied from the outside, even if the lock bar is made of an inexpensive material that responds to the magnetic force, there is a problem in the anti-theft function The purpose of the present invention is to provide a steering column lock device for a vehicle that can be prevented, so that the cost required for manufacturing can be reduced.

Steering column lock device of the present invention for achieving the above object is

A worm rotated by a motor;

A worm gear engaged with the worm;

An actuating cam integrally formed with the worm gear, the cam having a spiral cam curve gradually increasing from the center of rotation of the worm gear toward the outside of the worm gear;

A lock bar installed to linearly slide in a direction perpendicular to the rotation axis of the worm gear;

An actuating pin fixed to the lock bar and maintained in contact with a cam curve of the actuating cam;

An actuating spring for elastically supporting the lock bar in a locked state to maintain the actuating pin in contact with a cam curve of the actuating cam;

A protective pin installed to elastically protrude from the lock bar toward the operation cam;

A protect groove formed in the actuating cam so that the protect pin is inserted into the actuating cam when the worm gear is rotated so that the lock bar enters the locked state;

Characterized in that configured to include.

The worm gear is formed in a disc shape;

The actuating cam protrudes at a constant height from one side of the worm gear to form the spiral cam curve;

The protect groove is formed to be recessed from the protruding surface of the actuating cam;

The protection groove may have a structure in which a portion at which the protection pin starts to be inserted when the actuating cam is rotated in a direction in which the lock bar is locked, has an inclined surface that is gradually deepened from the protruding surface of the actuating cam.

According to the present invention, the lock bar of the lock bar cannot be released by the magnetic force applied from the outside, so that even if the lock bar is made of an inexpensive material that responds to the magnetic force, the anti-theft function is not impeded. To reduce costs.

1 to 3, an embodiment of the present invention includes a worm 3 which is rotated by a motor 1; A worm gear 5 engaged with the worm 3; An actuating cam 7 formed integrally with the worm gear 5 and composed of a spiral cam curve gradually increasing in radius from the center of rotation of the worm gear 5 toward the outside of the worm gear 5; A lock bar 9 installed to linearly slide in a direction perpendicular to the rotation axis of the worm gear 5; An actuating pin (11) fixed to the lock bar (9) and maintaining a state in contact with a cam curve of the actuating cam (7); An actuating spring (13) for elastically supporting the lock bar (9) in a locked state to maintain the actuating pin (11) in contact with the cam curve of the actuating cam (7); A protect pin (15) installed to protrude elastically from the lock bar (9) toward the operation cam (7); When the worm gear 5 is rotated so that the lock bar 9 enters the locked state, a protection groove formed in the actuating cam 7 is inserted into the actuating cam 7 so that the protect pin 15 is inserted into the actuating cam 7. 17).

Of course, a protection spring 19 for elastically protruding the protect pin 15 is provided between the protect pin 15 and the lock bar 9.

In the present embodiment, the worm gear 5 is formed in a disk shape, the operation cam 7 is projected to a certain height from one side of the worm gear 5 to form the spiral cam curve, the protect groove 17 is formed to be recessed from the protruding surface of the actuating cam 7.

In this case, as shown in FIG. 4, the protection groove 17 has a portion at which the protection pin 15 starts to be inserted when the operation cam 7 is rotated in a direction in which the lock bar 9 is locked. The inclined surface 21 gradually deepens from the protruding surface of the operation cam 7.

Looking at the operation of the present invention configured as described above with reference to Figures 2 and 3 as follows. For reference, the lock ring 23 of FIGS. 2 and 3 is a part fixed to the steering shaft so that the rotation of the steering shaft is suppressed because the lock bar 9 is locked to each other when the lock bar 9 is locked. For convenience, the state in which the lock bar 9 is included and the state in which the lock bar 9 is removed and the position of the actuating pin 11 and the protection pin 15 can be checked together.

In the unlocked state, the lock bar 9 is located on the upper side, and the rotation of the steering shaft which is integrally connected to the lock ring 23 is not free from the interference with the lock ring 23.

In this state, the actuating pin 11 is elastically supported from the upper side to the lower side of the actuating cam 7, and this elastic force is provided by the actuating spring 13 through the lock bar 9. have.

In other words, it is the contact structure of the actuating cam 7 and the actuating pin 11 that limits the movement of the lock bar 9 downward in this state.

In this case, the protect pin 15 is in a state of being in close contact with the protruding surface of the actuating cam 7, and has no effect on the mutual movement between the lock bar 9 and the actuating cam 7.

Looking at the motor (1) is rotated to switch to the locked state in the state as described above, the worm is rotated by the motor (1), the worm gear 5 fitted to the worm clock based on FIG. Rotate in the direction.

As the worm gear 5 rotates, the actuating pin 11 moves substantially along the downward straight arrow of FIG. 2, but with respect to the actuating cam 7 follows a spiral path as shown by the dotted line. do.

In other words, as the operation cam 7 is rotated, it is gradually moved downward to the position as shown in the locked state.

When the actuating cam 7 is rotated as described above, the protect pin 15 slides on the protruding surface of the actuating cam 7 and then the protect groove (i) is immediately before the lock bar 9 reaches the locked state. The protection groove 17 is inserted into the inclined surface 21 of FIG. 17 and is completely inserted into the protection groove 17 as shown in the locked state shown in FIGS. 2 and 3.

In the above state, even if any external force acts on the lock bar 9, the lock bar 9 does not move away from the lock ring 23 unless the protect pin 15 is broken.

That is, the lock bar 9 cannot be released from the lock ring 23 not only by the impact force from the outside but also by the magnetic force provided by the strong magnet.

 Therefore, in the steering column lock apparatus of the vehicle having the above structure, it is not necessary to configure the lock bar 9 with an expensive nonmagnetic material, thereby reducing the unit cost of parts.

On the other hand, the release of the lock state by the normal operation in the lock state as described above to be in the unlocked state is made only by the driving of the motor 1.

When the motor 1 is driven in the opposite direction to the above, the rotational force rotates the operation cam 7 counterclockwise through the worm and the worm gear 5.

Thus, the actuating pin 11 is pushed upward by the spiral cam curve of the actuating cam 7 to move the lock bar 9 upward.

With the upward movement of the lock bar (9), the protect pin (15) is initially unlocked by elastically supported on the protruding surface of the actuating cam (7) by gently leaving the protect groove (17) on the inclined surface (21). You are returned to the state.

1 and 2 are views showing a steering column lock device of a vehicle according to the present invention, a view comparing the unlock state and the locked state together,

3 is a cross-sectional view taken along line A-A and line B-B of FIG.

4 is a view illustrating in detail the protect groove and the protect pin of the operation cam.

<Brief description of symbols for the main parts of the drawings>

One; Motor 3; Wham

5; Worm gear 7; Working cam

9; Rock bar 11; Working pin

13; Working spring 15; Protect pin

17; Protector 19; Protect spring

21; Inclined surface 23; Lock ring

Claims (2)

A worm rotated by a motor; A worm gear engaged with the worm; An actuating cam integrally formed with the worm gear, the cam having a spiral cam curve gradually increasing from the center of rotation of the worm gear toward the outside of the worm gear; A lock bar installed to linearly slide in a direction perpendicular to the rotation axis of the worm gear; An actuating pin fixed to the lock bar and maintained in contact with a cam curve of the actuating cam; An actuating spring for elastically supporting the lock bar in a locked state to maintain the actuating pin in contact with a cam curve of the actuating cam; A protective pin installed to elastically protrude from the lock bar toward the operation cam; A protect groove formed in the actuating cam so that the protect pin is inserted into the actuating cam when the worm gear is rotated so that the lock bar enters the locked state; Steering column lock device of a vehicle, characterized in that configured to include. The method according to claim 1, The worm gear is formed in a disc shape; The actuating cam protrudes at a constant height from one side of the worm gear to form the spiral cam curve; The protect groove is formed to be recessed from the protruding surface of the actuating cam; Wherein the protect groove is the inclined surface that is gradually deeper from the protruding surface of the actuating cam is the portion where the actuating pin is inserted when the actuating cam is rotated in the direction that the lock bar is locked state Steering column lock device of a vehicle, characterized in that.

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