JP3216290B2 - Anti-vibration structure of footrest - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anti-vibration structure for a footrest, and more particularly to an anti-vibration structure for a footrest of a motorcycle.

[0002]

2. Description of the Related Art An example of a conventional vibration damping structure for a footrest is disclosed in Japanese Utility Model Laid-Open No. 2-1244781. 4 to 6 show the mounting structure of the footrest in the above publication. The vehicle body frame 41 is provided integrally with a substantially triangular sub-frame 50 that constitutes a part of a footrest support device.

[0003] A bracket 51 of substantially the same shape and size is attached to the sub-frame 50 by three-point support. That is, the bracket 51 is attached by the attachment member 52 with the elastic support members 53 having the V-groove and the isolation cylinders 54 interposed therebetween. Since the sub-frame 50 and the bracket 51 are mounted via the elastic support 53, they are so-called floating supports. Therefore, the bracket 51 is entirely floating supported on the sub-frame 50.

An ear piece 51a is formed on a part of the bracket 51, and a base 43a of the footrest 43 is fixed to the ear piece 51a. Such floating support prevents the vibration of the vehicle body frame 41 from being transmitted to the footrest 43 side.

[0005]

In the above-described prior art, the number of parts is also reduced since the brackets 51 are all fixed to the sub-frame 50 via the elastic support members 53 and are so-called floating supported all over. There was a problem that it became more expensive. Further, in the case where the bracket 51 is fixed at three points by being connected to the seat rail lower, there is a problem that the bracket 51 may cause resonance in the normal rotation range due to the rigidity of the bracket 51.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem, and an object of the present invention is to provide an anti-vibration structure for a footrest in which a floating support and a fixed support are combined.

[0007]

According to the present invention, there is provided a footrest mounted on a vehicle body frame.
While fixing the inner base end to the bracket,
A vibration damping footrest with footrest bar provided with facing protruding to the outside of the vehicle width direction, wherein the footrest bracket is supported by the supporting portion of the three to the vehicle body frame, the support portion of the three among clamping a horizontal plane passing through the foot <br/> rest bar or footrest bar
The two supporting portions, which are vertically separated from each other, are fixedly supported, and the central supporting portion is disposed at a vertically intermediate portion of the two fixed supporting portions , and the central supporting portion is elastic. It is configured to be floatingly supported on the body frame via the body. Also,
Footrest bracket attached to body frame
And the other end in the vehicle width direction.
With a footrest bar protruding outward from the
A footrest vibration isolating structure,
Brackets are three supporting parts for the body frame
The three support parts and the footrest bar
The shape connected to the mounting portion has a substantially square shape,
Footrest bar or footrest
It is placed vertically above and below the horizontal plane that passes through the bar.
The two supporting portions are fixedly supported, and the two
The footrest bracket behind the diagonal connecting the support
G and the footrest bar provided at the rear end
On the opposite front side across the line, approximately the same as the footrest bar
The central support is disposed at the same height position, and the central support is
It is configured to be supported floating on the body frame via an elastic body.
ing.

[0008]

The footrest bracket is attached to the body frame at three points. The mounting position is provided on a line of the footrest bracket along the body frame. And two supporting parts at the upper and lower ends of the line
It was a fixed support, centrally between the support of the two positions of the upper and lower ends
The support portion is a floating support.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. FIG. 1 shows an overall schematic diagram. In FIG. 1, the vehicle body frame 1 is provided with a fixing piece 2 and a concave portion 3 for supporting a footrest bracket 11 described later. A footrest bar 12 is provided at the rear (in the direction indicated by the arrow R in FIG. 1) of the footrest bracket 11 supported and fixed by the fixing piece 2 and the recess 3 described above.

FIG. 2 is a partially enlarged sectional view taken along the line AA in FIG. A bolt insertion hole 2a is formed in the fixing piece 2, and screw holes 3a and 3b are formed in the concave portion 3. On the other hand, a screw hole 11a is formed on the footrest bracket 11 side corresponding to the bolt insertion hole 2a.
Insertion holes 11b and 11c are formed corresponding to a and 3b. Specifically, as shown in FIG.
The ket 11 has a substantially square shape and forms a long diagonal line.
At the lower end, a screw hole 11a and a through hole 11c are fixed.
Are formed to connect the screw hole 11a and the insertion hole 11c.
An insertion hole 11b is formed at the end of the body frame across the square line
And the footrest bar 12 is placed on the other side
I have.

To attach the footrest bracket 11 to the vehicle body frame 1, the bolt insertion hole 2a and the screw hole 11
a, Align the screw holes 3a, 3b with the insertion holes 11b, 11c. Then, as shown in FIG. 2, the bolt 16 is moved from the bolt insertion hole 2a to the screw hole 11a in the direction indicated by the arrow X, and the bolt 13 is inserted from the insertion hole 11c to the screw hole 3b in the direction indicated by the arrow X. Insert and screw each. Then, after the elastic body 14 such as a rubber bush is inserted into the insertion hole 11b, it is screwed into the screw hole 3a in the direction opposite to the direction indicated by the arrow X using the floating bolt 15.

As described above, the mounting points of the footrest bracket 11 with respect to the body frame 1 are set at three points, and two of the three mounting points at the upper and lower ends which are separated from each other.
Since the screw hole 11a and the insertion hole 11c serving as the support portion are fixedly supported, and only the insertion hole 11b serving as the central support portion between them is floating, the footrest bracket 1
1. The level of vibration generated in the footrest bar 12 and the like can be reduced. This state is shown in the vibration acceleration curve of FIG.

In this embodiment, the mounting points of the footrest bracket 11 to the vehicle body frame 1 are set to three points, and the mounting positions of the upper and lower ends of the three mounting bolts are fixed by bolts 16 and 13. Support and
The mounting position at the intermediate point is floating supported by the floating bolt 15.

Thus, the number of parts can be reduced and the cost can be reduced as compared with the case where all the support points are floating support. Since the interval between the supporting points for fixedly supporting the footrest bracket 11 is large, the natural frequency is reduced, and the footrest bracket 11 and the footrest bar 12 do not generate large vibration. Since the vicinity of the center of the footrest bracket 11 is floatingly supported by the elastic body 14, the damping of the elastic body 14 can be used, and the vibration level of the footrest bar 12 and the footrest bracket 11 can be reduced. In addition, although it is a one-point floating support, since the number of support points is three, the mounting rigidity of the footrest bracket 11 can be secured.

[0015]

According to the present invention, the natural frequency is reduced, and the footrest bracket 11, the footrest bar 1
2 has an effect that large vibration does not occur. There is an effect that the number of parts can be reduced and the cost can be reduced as compared with the case of full floating support. The vicinity of the center of the footrest bracket is floatingly supported, so that the damping of the elastic body can be used and the vibration level of the footrest bar and the footrest bracket can be reduced. In addition, although there is one-point floating support, the number of support points is three, and there is an effect that the mounting rigidity of the footrest bracket can be secured.

[Brief description of the drawings]

FIG. 1 is a schematic explanatory view showing one embodiment of the present invention.

FIG. 2 is a partially enlarged sectional view taken along line AA in FIG.

FIG. 3 is a vibration acceleration curve showing an effect of one embodiment.

FIG. 4 is a schematic perspective explanatory view showing a conventional example.

FIG. 5 is an enlarged front view of a bracket showing a conventional example.

FIG. 6 is a partially enlarged sectional view taken along the line BB in FIG. 5;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Body frame 2 Fixing piece 2a Bolt insertion hole 3 Depression 3a, 3b Screw hole 11 Footrest bracket 11a Screw hole 11b, 11c Insert hole 12 Foot rest bar 13, 16 Bolt 14 Elastic body 15 Floating bolt

Claims (2)

(57) [Claims] 1. A footrest mounted on a vehicle body frame.
Fix the inner base end to the strike bracket and
Part of a vibration-proof structure of a footrest having Futtore <br/> Sutoba provided with facing protruding to the outside of the vehicle width direction, wherein the footrest bracket is supported by the supporting portion of the three with respect to the vehicle body frame, the of the supporting portions of three horizontal through <br/> footrest bar or footrest bar
Two supporting portions, which are arranged vertically separated from each other across the surface, are fixedly supported, and are vertically intermediate between the two fixed supporting portions.
A center support portion is disposed at the portion, and the center support portion is floatingly supported on the vehicle body frame via an elastic body. 2. A footrest mounted on a vehicle body frame.
Fix the inner base end to the strike bracket and
Foot that protrudes outward toward the outside in the vehicle width direction
An anti-vibration structure for a footrest having a rest bar, The footrest bracket is attached to the body frame
It is supported by three support parts, and the three support parts
The shape connecting the trest bar mounting part is approximately square
And the footrest bar of the three support portions
Or up and down across a horizontal plane passing through the footrest bar.
The two supporting portions that are arranged in between are fixedly supported, The rear side of the diagonal line connecting the two support portions at the upper and lower ends
The footrest provided at the rear end of the
At the front side opposite to the bar and the diagonal,
The center support is located at approximately the same height as the rest bar.
And The center support portion is supported by a floating support on the body frame via an elastic body.
Anti-vibration structure of footrest characterized by being held.