JP3390205B2 - Drive support device for electric telescopic steering - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drive support device for an electric telescopic steering, in which a movable body screwed with a screw rod rotated by an electric motor is fitted to a movable column.

[0002]

2. Description of the Related Art In the prior art, as shown in FIG. 11, in order to drive a telescopic column, a drive nut a is inserted into a support bracket b via a fitting portion c.

[0003]

When there is looseness in the fitting portion c, a sound is generated when the drive nut a is reversed back and forth, so that the precision of the fitting portion c is improved so that there is no backlash. Or it is necessary to press the drive nut a to eliminate the play.

[0004]

Therefore, as a result of intensive studies by the inventor to solve the above-mentioned problems, the present invention was found to connect the movable column to the fixed column so as to be movable in the axial direction, and A telescopic moving body provided with a motor-equipped telescopic driving screw rod along the axial direction between the movable column and the movable column, and a connecting shaft movable along the telescopic driving screw rod and protruding from both side surfaces. And a supporting portion that is connected to the telescopic moving body is formed in the movable column, a mounting recess is formed in the supporting portion, and a bearing portion that pivotally supports the connecting shaft of the telescopic moving body is formed. And a bearing body is fitted into the mounted recess so that a reaction force acts on the mounted recess side, and the telescopic moving body and the support part are connected via the bearing body. By using the drive support device for the pick steering, the manufacturing precision can be kept low, the backlash of the fitting part can be removed, and the electric telescopic device can be assembled very easily, and the assembly precision can be improved. You can

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. It is composed of a fixed column A and a movable column B as shown in FIG. 1 (a), and as shown in FIG. The movable column B moves in the front-rear direction with respect to the column A via the roller member G, and the telescopic operation of the steering wheel W is performed.

As shown in FIG. 2, a steering shaft S is provided inside the fixed column A and the movable column B. As shown in FIG. 1A, the steering shaft S can be expanded and contracted together with the movable column B. A steering wheel W is attached to the tip of the steering shaft S.

A telescopic driving screw rod 1 is mounted on the fixed column A along the axial direction, and the telescopic driving screw rod 1 is rotated by an electric motor M. Specifically, the driving body mounting portion 2 is formed on the fixed column A, and the electric motor M and the telescopic driving screw rod 1 are mounted (see FIG. 1).

The telescopic drive screw rod 1 includes:
As shown in FIGS. 1B and 3, the telescopic moving body 3 is provided in a screwed state, the telescopic moving body 3 and the movable column B are connected, and the telescopic drive screw rod 1 is provided. By rotating with the electric motor M,
The telescopic moving body 3 moves along the telescopic drive screw rod 1, and the movable column B moves in the axial direction according to the telescopic moving body 3.

The telescopic moving body 3 has an inner screw portion 3b formed in a block portion 3a, and the inner screw portion 3b is screwed with the telescopic drive screw rod 1 to provide a telescopic drive screw. The telescopic moving body 3 axially reciprocates the telescopic drive screw rod 1 in accordance with the rotation of the rod 1 in the axial direction (see FIGS. 1, 4 and the like).

Further, a connecting shaft 3c is formed on the outer surface of the block portion 3a of the telescopic moving body 3, and as shown in FIGS. 1 (a) and 1 (b) and FIGS. As shown in FIG. 2, the connecting shaft 3c is formed so as to project from the upper and lower surfaces of the block portion 3a.

Further, the support portion 6 on the movable column B side is specifically formed in a U-shaped cross section, and is composed of connecting pieces 6a, 6a and a vertical piece 6b facing each other in the vertical direction. The vertical piece 6b may be fixed to the tubular body 5 of the movable column B, or the connecting pieces 6a, 6a of the supporting portion 6 may be integrally formed from the tubular body 5.

The connecting pieces 6a, 6a of the supporting portion 6 are provided with recessed portions 7, 7 to be mounted, and more specifically, they are formed as substantially rectangular cutouts, which will be described later. Can be inserted.

The bearing body 8 is formed with a bearing portion 8a into which the connecting shafts 3c, 3c of the telescopic moving body 3 are inserted. The bearing portion 8a is specifically shown in FIGS.
As shown in, the bearing body 8 is formed as a through hole or has a circular recess.

The bearing body 8 is made of a synthetic resin or a metal material in a substantially rectangular shape, and more specifically,
It is formed slightly larger than the mounted recess 7 so that it can be fitted into the mounted recess 7.

Further, a crushing portion 8b is formed on the bearing body 8, and when the bearing body 8 is fitted into the mounting recessed portions 7, 7, the crushing portion 8b is crushed as shown in FIG. There is also an embodiment in which the reaction force acts on the mounted recesses 7, 7 side to firmly dispose the bearing body 8 in the mounted recesses 7, 7.

There are various examples of the crushing portion 8b of the bearing body 8, and the first example thereof is, as shown in FIG. 9, at both side ends where the bearing body 8 is sandwiched by the recessed portions 7 to be mounted. The bearing body 8 is formed in a projection shape, and when the bearing body 8 is inserted into the mounted recessed portion 7, the crushing portion 8b is crushed so that the bearing body 8 can be fitted. The reaction force of the crushing portion 8b acts to enable extremely strong fixation.

Next, as a second embodiment of the crushing portion 8b,
As shown in FIGS. 3 to 6, the protrusion is formed and a through hole is formed in the vicinity of the protrusion, and when the bearing body 8 is fitted into the mounting recessed portion 7, the through hole portion is formed. By crushing, the fitting can be performed, and the restoring force of the through hole portion serves as a pressing force to the mounted recess 7.

The shape of the through hole of the crushing portion 8b of the bearing body 8 may be a circular shape, a long hole shape, or a water drop shape (see FIG. 8), and is not limited to the shape of the above embodiment. However, the shape may be relatively crushable.

Further, as another embodiment of the crushing portion 8b, there is a press-fitting type as shown in FIG.

[0020]

According to the first aspect of the present invention, the movable column B is connected to the fixed column A so as to be movable in the axial direction.
Between the movable column B and the movable column B, a telescopic drive screw rod 1 with an electric motor M is provided along the axial direction, and the connecting shafts 3c, 3c are movable along the telescopic drive screw rod 1 and project from both side surfaces. The movable body B is provided with a telescopic moving body 3, and the movable column B is provided with a supporting portion 6 which is connected to the telescopic moving body 3. Body 3
A bearing portion 8a for axially supporting the connecting shafts 3c, 3c is formed, and the bearing body 8 is fitted into the mounted recessed portion 7 so that a reaction force acts on the mounted recessed portion 7 side, and the telescopic movement is performed. By using the drive support device for the electric telescopic steering in which the body 3 and the support portion 6 are connected via the bearing body 8, the assembly of the telescopic drive portion can be extremely simple and quick, and secondly, the accuracy in manufacturing. It is possible to obtain various effects such as lowering the

The above effect will be described in detail. A supporting portion 6 is formed on the movable column B, mounting recesses 7, 7 are formed in the supporting portion 6, and the telescopic moving body 3 is mounted in the mounting recesses 7, 7.
By making it possible to insert the bearing bodies 8 supporting the
With the telescopic moving body 3 axially supported by the bearing bodies 8 and 8, the bearing bodies 8 and 8 are mounted in the recessed portions 7 and 7 of the support portion 6.
It can be assembled very simply by simply fitting it in.

Next, the support portion 6 and the bearing body 8 are formed as separate members, and when the bearing body 8 is fitted into the mounting recessed portions 7, 7 of the support portion 6, it is mounted at an accurate position. As a result, the manufacturing precision of each member can be kept low, so that the manufacturing cost can be reduced.

Next, since the supporting portion 6 and the bearing body 8 are separate members, the bearing body 8 for axially supporting the telescopic moving body 3 is provided.
It is possible to easily remove the play between the support portion 6 and the support portion 6, and reduce the vibration and noise from the telescopic moving body 3.

Next, in a second aspect of the present invention, in the first aspect, when the bearing body 8 is fitted into the mounted recess 7, the reaction force is crushed to the mounted recess 7 side. By using the drive support device of the electric telescopic steering in which the crushing portion 8b that acts is formed, the bearing bodies 8 and 8 can be extremely easily fitted into the mounted recessed portions 7 and 7 of the support portion 6.

The above effect will be described in detail. Since the crushing portion 8b is formed in the bearing body 8, when the bearing body 8 is fitted into the mounting recessed portion 7, the crushing portion 8b is concentrated as shown in FIG. By this crushing, the fitting work can be extremely facilitated, and after the fitting, the crushing portion 8b produces a reaction force due to an appropriate restoring force with respect to the mounted recessed portion 7, so that the bearing body 8 is extremely mounted on the mounted recessed portion 7. Can be firmly fixed.

[0026]

[Brief description of drawings]

FIG. 1A is a plan view of a steering device using the present invention, and FIG. 1B is a perspective view of a main portion of the present invention.

FIG. 2 is a vertical sectional front view of a steering device using the present invention.

FIG. 3 is a plan view of a main part of a telescopic adjustment portion according to the present invention.

FIG. 4 is a perspective view of a main part of a telescopic adjustment part according to the present invention.

FIG. 5 is a perspective view showing a bearing body and a recess to be mounted.

FIG. 6 is a plan view showing a bearing body and a recess to be mounted.

FIG. 7 is an enlarged schematic view showing a state in which the crushing portion is crushed.

FIG. 8 is a plan view of a bearing body according to another embodiment.

FIG. 9 is a plan view of a bearing body according to another embodiment.

FIG. 10 is a plan view of a bearing body according to another embodiment.

FIG. 11 is a perspective view of a conventional example.

[Explanation of symbols]

A: Fixed column B ... Movable column M ... motor 1… Telescopic drive screw rod 3 ... Telescopic mobile unit 3c ... Shaft for connection 6 ... Supporting part 7: Recessed recess 8 ... Bearing body 8a ... Bearing part 8b ... crushed part

Continuation of the front page (56) Reference JP-A-61-33366 (JP, A) JP-A-61-105358 (JP, A) JP-A-59-230861 (JP, A) Jitsukaihei 2-44566 (JP , U) (58) Fields investigated (Int.Cl. ⁷ , DB name) B62D 1/00-1/28

Claims (2)

(57) [Claims] 1. A movable column is movably connected to a fixed column in an axial direction, a drive screw rod for a telescopic motor is provided between the fixed column and the movable column along the axial direction, and the drive screw rod for the telescopic is provided. Can be moved along
And mobile provided for telescopic for connecting shaft is formed to protrude from both sides, wherein the said movable column Therese
Forming a support portion for connecting the COPIC for mobile, to be mounting recess formed in the support portion, said telescopic for mobile
The bearing part that supports the connecting shaft is formed , and
The bearing body is fitted into the mounted recess so that a reaction force acts on the recess side, and the telescopic moving body and the support portion are connected to the shaft.
A drive support device for an electric telescopic steering wheel, characterized by being connected via a receiving body . 2. The bearing according to claim 1, wherein:
When it is inserted into the mounting recess, it is crushed and the reaction force
A drive support device for an electric telescopic steering, characterized in that a crushing portion that acts on the mounted recess side is formed.