JPH11240479A - Steering wheel unit of vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate tightening on a front fork, positioning, and slip prevention by fitting and tightening upper ends of a pair of front forks to an upper bracket, and by tightening on the boss the front fork to which installing portion of each of base end of a pair of left and right steering wheel bars are fit. SOLUTION: Upper ends of a pair of front forks 1 are fit to fitting holes 9 at both left and right ends of an upper bracket 2, respectively. A first bolt 16 which is inserted to a first bolt inserting hole 31, is tightened. Then the upper bracket 2 is tightened and supported in a condition where the fitting holes 9 thereof is fit to the upper end of the front fork 1. Further, an installation hole 19 of a steering wheel bar 7 is fit to the upper end of the front fork 1 which sticks out of a supporting portion 8 of the upper bracket 2. An edge of a second bolt 24 which is inserted into a second bolt inserting hole 22 is tightened after being inserted into a second screw hole 34 of a boss 12. Then an installation portion 18 is tightened to the boss 12.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steering device for a vehicle such as a motorcycle.

[0002]

2. Description of the Related Art Conventionally, in a steering device of a vehicle such as a motorcycle, a steering shaft is rotatably supported in a head pipe in front of a body frame, and upper and lower ends of the steering shaft are provided with an upper bracket and a lower bracket, respectively. Under brackets are fixed, the upper portions of a pair of front forks that support wheels are supported by these two brackets, and a handle bar is attached to the upper bracket or the front fork. By operating the handlebar, the steering shaft, front fork, and wheels rotate left and right with respect to the head pipe.

[0003] This handlebar has various shapes,
Various fixing methods have been proposed. For example,
Japanese Utility Model Application Laid-Open No. 60-124786 discloses a configuration in which a fixed seat is provided on the lower surface of an upper bracket, and a clamp portion of a handlebar is fastened to the fixed seat with a tightening bolt. In this configuration, the upper bracket is fitted to the front fork fitted with the handlebar clamp,
A handlebar is attached to a front fork by inserting a tightening bolt through a tightening seat of a clamp portion of the handlebar, and screwing into a screw hole provided in a fixing seat on the lower surface of the upper bracket to fasten. Therefore, the handlebar and the upper bracket can be fastened to the front fork, positioned, and prevented from falling off with a single fastening bolt.

[0004]

However, since the handlebar is disposed below the upper bracket and is fixed to the front fork with one bolt, it is necessary to remove the upper bracket when removing the handlebar. There is. Since the upper bracket is usually equipped with headlights and various meters, these must also be removed together, and replacement work of the handlebar is complicated.

[0005] The present invention has been made in view of such problems of the prior art, and when the handlebar is fixed, the handlebar can be easily fastened to the front fork, positioned, and prevented from coming off. The present invention aims to provide a steering apparatus for a vehicle, in which an upper bracket is firmly supported by an upper bracket and a handlebar can be easily replaced.

[0006]

According to a first aspect of the present invention, there is provided a steering apparatus for a vehicle, wherein upper ends of a pair of front forks supporting front wheels are fitted and fastened to an upper bracket. A boss is provided on the upper surface of the upper bracket, and a mounting portion at each base end of a pair of left and right handlebars is fitted to the front fork and fastened to the boss. According to this configuration, the upper bracket can be firmly fixed while being fitted to the upper end of the front fork separately from the handlebar. Also, when fixing the handlebar, the fastening to the front fork, positioning, and retaining can be performed only by fastening the mounting portion of the handlebar to the boss of the upper bracket.
Not only is this fixing work easy, but also the handlebar can be replaced without removing the upper bracket.

[0007] The vehicle steering system according to claim 2 is
The first slit according to claim 1, wherein the support portion of the upper bracket is formed with a first slit extending from a fitting hole fitted to a front fork to a side surface of the support portion to apply elastic deformation to the support portion at the time of fastening, A second slit is formed in the mounting portion of the handle bar, extending from a mounting hole fitted to a front fork to a side surface of the mounting portion, and providing the mounting portion with elastic deformation at the time of fastening. It is arranged at a position where the overlap occurs when viewed from the axial direction of the fork. According to this configuration, the slit is provided in each of the support portion of the upper bracket and the attachment portion of the handlebar, so that the front fork can be easily inserted into the support portion of the upper bracket, and can be firmly supported and fixed. Can be firmly attached to the front fork in a state where it can be easily attached and detached. Further, since the first slit and the second slit are arranged at a position where they overlap when viewed from the axial direction of the front fork, the direction in which the support portion of the upper bracket and the attachment portion of the handlebar are elastically deformed at the time of fastening is also required. Since they are the same, a different direction of force does not act on a fastener such as a bolt used for fastening the support portion to the front fork and fastening the mounting portion to the upper bracket.

[0008] Further, a vehicle steering device according to claim 3 is provided.
The second bolt according to claim 1 or 2, wherein the first bolt crosses the first slit to fasten the upper bracket to the front fork, and the second bolt crosses the second slit to fasten the handlebar to the front fork. The bolt has a head that is rotationally fastened with the same tool, and
These heads face in the same direction. According to this configuration, the first bolt and the second bolt can be tightened from the same direction by using the same tightening tool, so that workability is improved, and the appearance is united and good. is there.

[0009]

Preferred embodiments of the present invention will be described below in detail with reference to the drawings. 1 and 2
1A and 1B are a plan view and a side view showing a vehicle steering device according to an embodiment of the present invention. The vehicle is a motorcycle, and includes a pair of left and right front forks 1, 1 supporting wheels (not shown), as shown in FIG. As shown in FIG. 2, the front fork 1 has an upper end supported by the upper bracket 2 and a lower portion supported by the under bracket 3. The brackets 2 and 3 are fixed to a steering shaft 4. The steering shaft 4 is provided in a head pipe 6 at a front portion of a body frame 5, and a bearing (not shown) disposed at upper and lower ends thereof. ) Is rotatably supported. As shown in FIG. 1, a pair of left and right handlebars 7 are supported by the upper bracket 2.

As shown in FIG. 3, the upper bracket 2 is provided with support portions 8 at both left and right ends, and the support portions 8 are provided with fitting holes 9 through which the front forks 1 are fixed. The support portion 8 is formed with a first slit 10 extending from the fitting hole 9 to the side surface of the support portion 8 and providing the support portion 8 with elastic deformation at the time of fastening. The first slit 10 is orthogonal to the first slit 10. A first bolt insertion hole 31 and a first screw hole 32 are provided in the direction in which the bolts are inserted. As shown in FIG. 4, a boss 12 is protruded near the fitting hole 9 of the support portion 8, and a second screw hole 34 is formed in the boss 12 in a direction orthogonal to the first slit 10. That is, it is provided in a direction parallel to the first screw hole 32. Further, a stepped steering hole 14 vertically penetrated for fixing the steering shaft 4 is provided in the center of the upper bracket 2 in FIG.

When the upper ends of the pair of front forks 1 are fitted into the right and left fitting holes 9 of the upper bracket 2 respectively, and the first bolts 16 are inserted into the first bolt insertion holes 31 and tightened, The first slit 10 is elastically deformed and slightly narrowed, and is fastened and supported in a state where the upper end of the front fork 1 is fitted into the fitting hole 9 of the upper bracket 2. The upper bracket 2 has a steering hole 1
4 into the upper end of the steering shaft 4 in FIG.
The stepped portion 14a of the steering hole 14 is brought into contact with the upper end surface thereof, and the nut 15 is fixed to the hollow portion of the steering shaft 4.
The bolt 17 is fixed to the upper end of the steering shaft 4 by screwing and tightening a bolt 17 from the upper surface side of the upper bracket 2. The lower portion of the steering shaft 4 is fixed to the under bracket 3 by means such as welding.

Next, as shown in FIG. 5, the handlebar 7 has a mounting portion 18 welded to the base end of the rod portion 20, and the mounting portion 18 has a mounting hole 19 fitted to each front fork 1. Is provided. The mounting portion 18 has a mounting hole 1
Forming a second slit 21 extending from 9 to the side surface of the mounting portion 18 and giving the mounting portion 18 elastic deformation at the time of fastening;
A second bolt insertion hole 22 is provided in a direction orthogonal to the second slit 21. An attachment hole 19 of the handlebar 7 is fitted to the upper end of the front fork 1 projecting from the support portion 8 of the upper bracket 2, and the attachment surface 23 of the attachment portion 18 is brought into contact with the end surface of the boss 12. , The second bolt 24 inserted through the second bolt insertion hole 22
When the front end of the front fork 1 is tightened by inserting it into the second screw hole 34 of the boss 12, the second slit 21 is elastically deformed and becomes slightly narrower. The mounting portion 18 is fastened to the boss 12 in a state where the boss 12 is fitted.

The first bolt 16 and the second bolt 24 are allen bolts having hexagonal tool insertion holes on the top surfaces of the heads 16a, 24a, and have the same diameter.
Therefore, the tool insertion holes have the same dimensions and are rotated by the same tool. In addition, the first bolt 16 and the second bolt 24
Are parallel, and their heads 16a, 24a face in the same direction.

In the above configuration, the upper bracket 2
Is firmly supported on the front fork 1 by a first bolt 16 different from the second bolt 24 for fastening the handlebar 7. When fixing the handlebar 7,
The handlebar 7 is attached to the boss 12 of the upper bracket 2.
By simply tightening the mounting portion 18, the fastening to the front fork 1, positioning and retaining can be performed, so that this fixing work is easy and the handlebar 7 can be replaced without removing the upper bracket 2. Can be. Further, a slit 10 is provided in each of the support portion 8 of the upper bracket 2 and the mounting portion 18 of the handlebar 7.
Since the front fork 21 is provided, the front fork 1 can be easily inserted into the support portion 8 of the upper bracket 2 and can be firmly supported and fixed, and the mounting portion 18 of the handlebar 7 can be easily attached to and detached from the front fork 1. Can be attached to

Further, since the first slit 10 and the second slit 21 are arranged at a position where they overlap when viewed from the axial direction of the front fork 1, the support portion 8 of the upper bracket 2 and the handlebar 7 at the time of fastening are provided. The direction in which the mounting portion 18 is elastically deformed is the same, so that bolts 16 and 24 used for fastening the support portion 8 to the front fork 1 and fastening the mounting portion 18 to the upper bracket 2 are used. No different direction force acts on the fastener. Further, since the first bolt 16 and the second bolt 24 can be tightened from the same direction by using the same tightening tool, workability is improved, and the appearance is uniform and good.

[0016]

As described above, according to the present invention, the upper bracket can be firmly supported and fixed while being fitted to the upper end of the front fork separately from the handlebar. By simply fastening the handlebar mounting part to the bracket boss, fastening to the front fork, positioning, and retaining can be done, so this fixing work is not only easy, but also the handlebar can be removed without removing the upper bracket. Can be replaced.

[Brief description of the drawings]

FIG. 1 is a plan view showing a steering device of a vehicle according to an embodiment of the present invention.

FIG. 2 is a side view showing the handle device.

FIG. 3 is a plan view showing an upper bracket of the handle device.

FIG. 4 is a side view showing an upper bracket of the handle device.

FIG. 5 is a plan view showing a handle bar in the handle device.

[Explanation of symbols]

1. Front fork, 2. Upper bracket, 7.
Handlebar, 8 ... Support, 9 ... Fit hole, 10 ... First slit, 12 ... Boss, 16 ... First bolt, 16a ...
Head, 18 mounting portion, 19 mounting hole, 21 second slit, 24 second bolt, 24a head

Claims (3)

[Claims] An upper end of a pair of front forks supporting a front wheel is fitted and fastened to a support portion of an upper bracket, a boss is provided on an upper surface of the upper bracket, and a base end of a pair of left and right handlebars. The handle portion of the vehicle, wherein the mounting portion is fitted to the front fork and fastened to the boss. 2. The first part according to claim 1, wherein the support portion of the upper bracket extends from a fitting hole fitted to a front fork to a side surface of the support portion, and applies elastic deformation at the time of fastening to the support portion. A slit is formed, and a second slit is formed in the mounting portion of the handlebar, extending from a mounting hole fitted to a front fork to a side surface of the mounting portion, and elastically deforming the mounting portion at the time of fastening. A handle device for a vehicle in which both slits are arranged at a position where they overlap when viewed from the axial direction of the front fork. 3. The front fork according to claim 1, wherein the first bolt crosses the first slit to fasten the upper bracket to the front fork, and the handlebar crosses the second slit to the front fork. A steering apparatus for a vehicle, wherein a second bolt to be fastened has a head rotated by the same tool, and the heads face in the same direction.