JP2603655Y2 - Electric tilt steering - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric tilt steering system in which the assembling of a device can be made extremely easy, and after the assembling, the tilting column can be prevented from rattling for a long time.

[0002]

2. Description of the Related Art As a prior art, for example, Japanese Unexamined Patent Publication No. Sho 59-2
As disclosed in Japanese Patent No. 30861, a screw shaft is rotated by a motor to move a nut member screwed to the screw shaft in an axial direction, and metal nuts are formed on both sides of the nut member in a direction perpendicular to the axis. Provide a holding member,
A link member is inserted into the metal holding member and held by a nut via a washer at an engaging portion with the link member, and the other end of the link member is connected to an upper bracket to tilt the upper main shaft. There was an electric tilt steering device.

[0003]

In the above structure, the connecting member between the metal holding member and the link member provided on both sides in the direction perpendicular to the axis has a connecting hole formed in the link member inserted into the holding member. Since the engagement with the nut is held by a nut via a washer, the play of the engaging portion cannot be adjusted. Therefore, in order to reduce the play generated in the engaging portion, a holding member is required. In addition, it is necessary to increase the manufacturing accuracy of the connection hole of the link member.

[0004] However, when the clearance between the engaging portions is reduced, the play is reduced, but the frictional resistance is increased and the rotation may be heavy. In addition, the clearance generated in the engaging portion (due to manufacturing errors, wear and tear, etc.). Cannot be kept small over a long period of time.

[0005]

Accordingly, the inventor of the present invention has made intensive studies to solve the above-mentioned problems, and as a result, the present invention has been proposed in which a fixed column provided with a driving screw body and a tilting column are pivotally supported so as to be tiltable. Connected, forming a bifurcated support projection below the tilting column, providing an inverted U-shaped bearing groove in the support projection,
A rotating shaft is provided on both sides facing the support protrusion, and a moving body screwed to the driving screw body is disposed between the support protrusions,
Insert the rotating shaft into the bearing groove via a bearing,
An elastic portion is formed below a bearing plate having a bearing hole through which the rotating shaft passes, and an insertion locking portion is formed below the elastic portion to form a bearing plate, and an insertion locking portion of the bearing plate is formed. Is inserted and locked into the inserted and locked portion of the support projection, and a pressing washer is inserted into a rotating shaft of the moving body that penetrates the bearing plate, and the tapered side surface of the pressing washer is positioned below the bearing hole. The tilting shaft of the moving body is fixed by a tightening nut in a pressed state together with the pressing washer so that the rotating shaft of the moving body is pressed upward together with the pressing washer. After the assembly, the tilt column can be prevented from rattling for a long period of time, thereby solving the above problem.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings. As shown in FIG. 1, a fixed column A and a tilting column B are provided. In the direction, the tilt operation of the steering wheel is performed.

A steering shaft housed inside the fixed column A and the tilting column B is provided therein, and the steering shaft is continuously connected to the tilting column B at a tilting position by a universal joint or the like. The steering wheel is attached to the tip.

[0008] The fixed column A comprises a shaft tube 1 and a joint housing A1.
The jointed portion of the tilting column B is connected between the joint side surfaces 2 and 2 at appropriate intervals by pivotal supports 3 and 3 so as to be tiltable in the vertical direction. ing.

In the tilting column B, the fixed column A
Is formed, and a tilt shaft tube 5 is formed from the tilt connection portion 4;
As described above, the tilt connection portion 4 is disposed between the joint side surfaces 2 and 2 of the joint housing portion A1, and is pivotally connected by the tilt pivot support.

A bifurcated support projection 6, 6 is formed below the tilting connection part 4, and a movable body C described later is mounted on the support projection 6, 6 so as to be rotatable. A driving screw body 17 mounted on the moving body C and the fixed column A side
Thus, the tilting column B can tilt freely to perform a tilt operation.

The support projections 6, 6 are formed with inverted U-shaped bearing grooves 6a, 6a.
The locked insertion grooves 6b, 6b are formed in the lower portions of the grooves a, 6a.

[0012] As shown in FIG.
An inner screw portion 8 is formed in the inside of the housing 7, and rotating shafts 9, 9 are formed orthogonally to the inner screw portion 8 of the casing 7, and the rotating shaft 9 is formed by a shaft portion 9a and a screw shaft. The shaft 9a is formed closer to the housing 7 side.

The housing 7 of the movable body C is disposed so as to be located between the two support projections 6, 6, and the rotating shafts 9, 9
Are inserted through bearings 10 into bearing grooves 6a of the support projections 6, 6.

In order to rotatably fix the movable body C to the support projections 6, 6, bearing plates D, D are used. The bearing plate D has an elastic portion 12 below a bearing plate 11. Formed,
An insertion locking portion 13 is formed below the elastic portion 12, and a bearing plate 11 has a bearing hole 11a formed therein, and the bearing hole 11a is formed in a substantially oval shape. .

The elastic portion 12 is formed so as to protrude to one side with respect to the bearing plate 11, and is specifically formed to be bent in an arc shape. When the elastic portion 12 is suppressed by an external force, The reaction force acts to restore the original shape (see FIG. 9).

Further, the suppression washer 14 has an outer periphery formed in a frusto-conical shape, and a through hole 1 is formed inside the tapered side surface 14a.
4b are formed, and the through hole 14b is a hole through which the rotating shaft 9 of the moving body C passes. When the moving body C is fixed to the support protrusions 6, 6 via the bearing plate bodies D, D The tapered side surface 14a is inserted into the bearing plate D while the rotating shafts 9, 9 of the moving body C passing through the bearing holes 11a of the bearing plate D, D are inserted into the through holes 14b of the suppression washer 14. Bearing hole 1
1a, and tighten the tightening nut 15 with the screw shaft 9 of the rotating shaft 9.
b.

At this time, when the rotation shaft 9 of the moving body C is inserted into the suppression washer 14 and the suppression washer 14 is inserted into the bearing hole 11a of the bearing plate D, the lower end surface of the bearing hole 11a is suppressed. The washer 14 is suppressed upward and the washer 1 is suppressed.
The rotating shaft 9 penetrating through 4 can be suppressed at the upper ends of the bearing grooves 6a, 6a.

A drive support 16 for tilting is formed below the joint housing A1 so as to protrude toward the steering wheel, and a drive screw 17 is provided on the drive support 16 for tilting.
Is provided, the driving screw body 17 includes a screw shaft 17a and a swing support portion 17b, and the screw shaft 17a is
, And is rotated by an electric motor M mounted at 16 portions of the tilting drive support section.

The swing support portion 17b is formed as a spherical surface at the axial end of the screw shaft 17a.
The spherical surface rotates within a predetermined range within 7c, and the screw shaft 17a can swing with the spherical surface.

The gear mechanism 18 is composed of two screw gears, and rotates a screw shaft 17a of a driving screw body 17 by a motor M via a worm gear mechanism.
As described above, the driving screw body 17 is configured such that the screw shaft 17a is rotated by the electric motor M and is freely swingable.

The screw shaft 17a of the driving screw body 17 and the inner screw portion 8 of the moving body C are screwed together.
a is rotated by the electric motor M, the moving body C moves along the axial direction thereof, and the tilting column B tilts up and down in response to the movement of the moving body C. With respect to a change in the angle with respect to the fixed column A caused by the tilting of the column B, the action direction of the force of the screw shaft 17a of the driving screw body 17 and the moving body C is always the same direction.
The screw shaft 17a and the moving body C are appropriately rotated and swung so that no excessive force is applied to the screw shaft 17a and the moving body C.

That is, the load received from the driver's hand operating the steering wheel H and the weight of the steering wheel H, the steering shaft S, etc. act on the tilting column B as a load. Although a load is applied downward, the tilting column B
Is rotated about a pivot point between the tilting column B and the fixed column A, and the moving body C is driven by the driving screw 1.
A force is applied in a direction away from the swinging support portion 17b of the driving member 7, so that the moving body C applies a tensile load to the screw shaft 17a of the driving screw body 17.

As shown in FIG. 1, the movable body C is located at a position farther from the steering wheel than the swing support portion 17b of the drive screw body 17, in other words, the swing support portion 17b of the drive screw body 17 , A position configuration existing between the steering wheel and the moving body C.

[0024]

According to the present invention, a fixed column A having a driving screw body 17 and a tilting column B are pivotally connected so as to be tiltable, and a bifurcated support projection 6 is formed below the tilting column B. A movable body C having an inverted U-shaped bearing groove 6a provided on the support projection 6 and having rotating shafts 9 and 9 on both side surfaces facing the support projection 6 and screwing with the driving screw body 17 is provided. The rotating shaft 9 is disposed between the support protrusions 6
a through a bearing 10, an elastic portion 12 is formed below a bearing plate 11 having a bearing hole 11 a through which the rotating shaft 9 passes, and an insertion locking portion 13 is formed below the elastic portion 12. To form a bearing plate D, and the insertion locking portion 1 of the bearing plate D
3 is inserted and locked into the inserted locking portion 6b of the support projection 6,
The pressing washer 14 is inserted into the rotating shaft 9 of the moving body D penetrating the bearing plate D, and the tapered side surface 14a of the pressing washer 14 is inserted so as to press below the bearing hole 11a. The rotating shaft 9 of the moving body C is
In addition, an electric tilt steering system which is fixed upward by a tightening nut 15 in a pressed state is used, so that the first
Second, it is possible to easily prevent backlash of the tilting column B, and secondly, it is possible to maintain the backlash prevention for a long time.

The above effect will be described in detail. The elastic portion 12 is provided below the bearing plate 11 having the bearing hole 11a through which the rotating shaft 9 passes.
The pressing washer 14 is inserted into the rotating shaft 9 of the moving body D that penetrates the bearing plate D formed with the pressure washer, and the tapered side surface 14a of the pressing washer 14 is inserted so as to press below the bearing hole 11a. Then, the rotating shaft 9 of the moving body C is fixed together with the pressing washer 14 in the upwardly pressed state by the tightening nut 15, so that the bearing plate body D is constantly suppressed upward by the elastic portion 12. That is, the bearing 10 on which the rotating shafts 9 of the moving body C are pivotally supported is provided with the bearing grooves 6a, 6a.
It is possible to prevent the tilting column B to which the moving body D is attached from occurring, so that the tilting column B to which the moving body D is attached can be prevented from being loosened.

Next, the bearing plate D has an elastic portion 12, and when the moving body C is mounted on the support projection 6 via the bearing plate D, the suppression washer 14 is fixed by the tightening nut 15. Rotating shaft 9
When the elastic member 12 is tightened, the elastic portion 12 is once compressed downward by suppressing the portion below the bearing hole 11a of the bearing plate D, but the restoring force of the elastic portion 12 acts, and as shown in FIG. The hole 11a is raised to thereby suppress the washer 14
The movable body C can be kept pushed up by the elastic force of the elastic portion 12 so that the tilting column B having the movable body C attached to the lower end can be prevented from rattling for a long time. There are advantages that can be done.

[Brief description of the drawings]

FIG. 1 is a side view of a partial cross section showing the entirety of the present invention.

FIG. 2 is a partial cross-sectional side view showing a main part of the present invention.

FIG. 3 is a plan view showing a main part of the present invention as a partial cross section.

FIG. 4 is a vertical sectional front view showing a motor and a gear mechanism.

FIG. 5 is an exploded perspective view of the moving body and the bearing plate of the present invention.

FIG. 6 is a cross-sectional view showing a state where the moving body is mounted on a tilting column.

FIG. 7 is an enlarged exploded view of the moving body and the support protrusion.

FIG. 8 is an exploded perspective view of a bearing plate and a protected insertion groove of a support protrusion.

FIG. 9 is a sectional view showing the operation of the elastic portion of the bearing plate.

[Explanation of symbols]

 A: fixed column B: tilting column 6: support projection 6a: bearing groove 6b: inserted and locked portion C: moving body 9: rotating shaft 10: bearing D: bearing plate 11: bearing plate 11a: bearing hole 12 ... Elastic part 13 Insertion locking part 14 Suppression washer 14a Tapered side surface 15 Tightening nut 17 Drive screw body

──────────────────────────────────────────────────続 き Continuation of the front page (56) References Japanese Utility Model 1-68979 (JP, U) Japanese Utility Model 63-165269 (JP, U) Japanese Utility Model 64-4569 (JP, U) Japanese Utility Model 1 147778 (JP, U) (58) Field surveyed (Int. Cl. ⁷ , DB name) B62D 1/04-1/20

Claims (1)

(57) [Scope of request for utility model registration] 1. A fixed column provided with a driving screw body and a tilting column are pivotally connected to each other so as to be tiltable, and a bifurcated support projection is formed below the tilt column , and the support projection has an inverted U-shape. A bearing groove is provided, a rotating shaft is provided on both sides facing the support protrusion, a moving body screwed to the driving screw body is arranged between the support protrusions, and the rotating shaft is mounted on the bearing groove by a bearing.
Insert through the pivot axis to form an elastic portion below the bearing plate having a bearing hole penetrating to the bearing plate material to form an insertion locking portion below the elastic portion, the bearing plate the insertion locking portion of the body inserted into and engaged to the insertion locking portion of the supporting protrusion, the shaft
A pressure washer is inserted through the rotation axis of the moving body that penetrates the receiving plate
The tapered side surfaces of the pressing圧座gold is inserted so as to press the lower portion of the bearing hole and, before the rotation axis of the movable body
An electric tilt steering, which is fixed together with the pressing washer in a state of being pressed upward by a tightening nut.