JPH1111328A - Telescopic steering device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the required space, and to reduce the cost by advancing/ retracting a yoke or a shaft by a telescopic device by the prescribed distance according to the unlocking or locking signal of a steering lock to achieve the unlocking or the locking through the fitting to or opening from the shall or the yoke. SOLUTION: When the locking signal of a steering lock (SR) is given, a yoke 3 is retracted, and the engagement of the yoke 3 with a shaft 2 is opened over the largest retracting position of the telescopic regulation position. The rotation of the yoke 3 is not transmitted to the shaft 2, or the rotation of the steering wheel is not transmitted to a steering mechanism, resulting in SR condition. When the unlocking signal of SR is given, the yoke 3 is advanced, the yoke 3 is engaged with the shaft 2, and stopped at the regulation position immediately before the locking of SR. Because a shaft slide mechanism for telescopic operation is disengaged, and the steering wheel is idled in SR, the mechanism to mechanically stop the rotation can be dispensed with, which is advantageous from the aspects of both the space and the cost.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used for providing a telescopic steering mechanism with a lock mechanism.

[0002]

2. Description of the Related Art A telescopic steering apparatus will be described with reference to FIG. Telescopic steering device
Shaft 2 rotatably supported on fixed side bracket 1
Has. The tip of the shaft 2 is inserted into the hollow portion of the yoke 3 so that the yoke 3 can rotate the shaft 2 and the yoke 3 can reciprocate with respect to the shaft 2.

The yoke 3 is pivotally supported by a movable bracket 4. The movable bracket 4 and the yoke 3
Is rotatable with respect to the movable bracket 4, but
The yoke 3 follows the reciprocation of the movable bracket 4. A steering wheel (not shown) is fixed to the other end of the yoke 3.

As a result, the rotation of the steering wheel causes the yoke 3 to rotate, and then the shaft 2 to rotate,
A steering mechanism (not shown) is operated. If an attempt is made to provide an electric steering lock in such a steering device, a steering lock as shown in Japanese Patent No. 2517907 is conceivable.

[0005]

The steering apparatus disclosed in the above-mentioned patent uses a serration fitting when the telescopic device moves the shaft back and forth a predetermined distance in response to an unlocking or locking signal of a steering lock. Free or lock the rotation of

However, according to this method, it is necessary to provide serrations for locking on the shaft and the fixed bracket, so that a large space is required and the cost is increased.

[0007]

According to the present invention, in order to solve the above-mentioned problems, a telescopic device moves a yoke or a shaft back and forth a predetermined distance in response to an unlocking or locking signal of a steering lock. Unlocking or locking is performed by fitting or releasing.

That is, according to the present invention, the movable bracket driving device allows the shaft and the yoke to be fitted in the range of height adjustment of the steering wheel, and is released by driving beyond the adjustment range when the steering is locked. The rotation is not transmitted to the rotating shaft of the yoke, that is, the rotation of the steering wheel is not transmitted to the steering mechanism, that is, a locked state is set.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The operation of the telescopic steering has been described in the prior art and will not be described. The basic operation is to adjust the steering position from the most forward position shown in FIG. 2 to the most backward position shown in FIG. It is to be.
At any position, the shaft 2 and the yoke 3 are fitted to transmit rotation from the yoke 3 to the shaft 2.

Now, when a steering lock signal is received, the yoke 3 moves backward and moves beyond the last retracted position of the telescopic adjustment position. Therefore, as shown in FIG.
Is released from the shaft 2.

At this time, the rotation of the yoke 3 is not transmitted to the shaft 2, that is, the rotation of the steering wheel is not transmitted to the steering mechanism, so that the steering is locked.

Conversely, when the unlock signal of the steering lock is received, the yoke 3 moves forward, the yoke 3 and the shaft 2 are fitted, and stops at the adjustment position immediately before locking of the steering lock. A hexagonal or octagonal polygon is suitable for the fitting portion between the yoke 3 and the shaft 2 in order to lock the fitting once removed.

Usually, a steering wheel has a design or shape direction. Therefore, when the steering lock is unlocked and the yoke 3 and the shaft 2 are re-fitted,
The fittings must always be in phase. An example of this method will be described below.

FIG. 5 shows a fitting portion between the yoke and the shaft.
A permanent magnet is embedded in each surface of the hexagonal portion forming the fitting guide 3a of the yoke. Of these, only one surface has the N pole, the other surface has the S pole, or only one surface has the S pole, and the other surface has the N pole facing the outside.

On the other hand, in the hexagonal portion forming the fitting guide portion 2a of the shaft, the permanent magnet faces the S pole or the N pole only on one surface to the outside. Therefore, there is only one combination of the north pole and the south pole attracting each other, and they are always locked at the neutral position having the same phase. At this time, the permanent magnet may be an electromagnet.

A method is also conceivable in which the yoke 3 is advanced in the fitting direction only when a matching signal of a normal phase between the yoke 3 and the shaft 2 by a sensor or the like and an unlock signal of the steering lock are aligned.

In order to improve the anti-theft property of the steering lock, it is more effective to use a radio key signal as the steering lock unlocking signal.

[0018]

As described above, in a steering lock for suppressing transmission of rotation from the steering wheel to the steering mechanism, a mechanism for mechanically stopping the rotation is unnecessary because the steering wheel idles by releasing the fitting of the telescopic shaft slide mechanism. And space
This is advantageous in cost. Also, because of the idling, no matter how large the rotational force from the outside becomes, it will not be destroyed.

[Brief description of the drawings]

FIG. 1 shows an outline of a telescopic steering device.

FIG. 2

FIG. 3 shows an unlocked state.

FIG. 4 shows a locked state.

FIG. 5 shows a fitting guide portion between the shaft and the yoke.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Fixed side bracket 2 ... Shaft 2a ... Fitting guide part 3 ... Yoke 3a ... Fitting guide part 4 ... Movable bracket

Claims (2)

[Claims] 1. A shaft rotatably supported by a fixed bracket, and a shaft that rotates the shaft. The yoke is reciprocable with respect to the shaft, and the yoke is reciprocable with the yoke with respect to the fixed bracket. A movable bracket for rotatably supporting the yoke, and a driving device for reciprocating the movable bracket with respect to the fixed bracket, wherein the driving is performed in response to an unlocking or locking signal of a steering lock. A telescopic steering device, wherein a device moves the yoke back and forth by a predetermined distance so that a fitting for transmitting rotation of the yoke and the shaft can be disengaged. 2. A yoke and a shaft fitting guide portion, provided with an N-pole or S-pole magnet only on one side of the shaft polyhedron, on the other hand, on one side of the yoke as a counter electrode to the pole of the shaft magnet. The telescopic steering device according to claim 1, wherein the surface has the same polarity as a pole of a magnet of the shaft.