JPS61261172A - Front bumper device in motorcycle - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION OBJECTS OF THE INVENTION (1) Industrial Field of Application The present invention relates to a front bumper device mounted on a front fork of a motorcycle.

(2) Conventional technology In conventional motorcycles, a 7r:1 front fork, which suspends the front wheel, is provided with a 7r:1 tip fender to prevent the vehicle body from getting dirty, and a stabilizer is installed on the front fork to increase its rigidity. However, it is not known that the front fork is provided with a front bumper to prevent scratches or damage to the vehicle body.

(3) Problems to be Solved by the Invention Therefore, the present invention installs a front bumper at the bottom of the front fork to protect the vehicle body.

The purpose of the front bumper is to provide a front funder device for a motorcycle, which also functions as a stabilizer for a front fork and a front fender.

B1 Structure of the Invention (1) Means for Solving the Problems According to the present invention, in order to achieve the above-mentioned object, there is provided a steering stem part supported in a steerable manner on the vehicle body frame, and a lower part of the steering stem part. In a motorcycle equipped with a front fork consisting of an integrally provided fork part and a front wheel suspended on the fork part, a U-shaped part extending in the front-rear direction straddles the front wheel at the lower part of the front fork. Support 70 ntbamba.

(21 Actions) The front bumper, which straddles the tires of the front wheels, prevents scratches and damage to the front of the vehicle body, acts as an auxiliary front fender, blocks dirt and splashes, and acts as a stabilizer. It increases the rigidity of the front fork and is also used as a hook for transporting motorcycles onboard.

(3) Examples Embodiments of the present invention will be described below with reference to the drawings.

First, the first embodiment will be described with reference to FIGS. 1 and 2. A front fork F is steerably supported on a head pipe 2 of a body frame 1 of a seat type motorcycle. A front wheel 3 is suspended at the lower end of F via a bottom link suspension system.

As shown in FIG. 2, the front fork F includes a steering stem portion 4 rotatably supported by the head pipe 2, and an inverted U-shaped fork portion integrally provided at the lower end of the steering stem portion 4. It consists of 5 and more.

A pair of bottom links 6 are provided at the lower left and right ends of the fork portion 5.
．． The front ends of the bottom links 6, 6 are supported by shafts 7, 7 so as to be able to swing up and down, and the front wheels 3 are rotatably supported with an axle 8 at the rear ends of these bottom links 6, 6. The lower ends of front cushions 9, 9 are connected 10.10 to the middle part of the bottom link 6.6, respectively, and the upper ends of these front cushions 9, 9 are suspended 11 so as to be swingable to the left and right of the fork part 5. .1
1 will be given. At the lower left and right ends of the fork portion 5, both left and right ends of a U-shaped front bumper 12 extending in the front-rear direction across the front portion of the front wheel 3 are supported. The front bumper 1
2 is made of iron or aluminum alloy and is made of pipe or plate material.

The front end of the front bumper 12 protrudes further forward than the front end of the front fender 13 in front of the vehicle body B, so that when the motorcycle is running, it hits an obstacle in front of it before the front fender 13. It's now 5.

The front fork F is covered by the front part of the vehicle body B, and a cover 5 is provided on the front surface of the vehicle body B to cover the upper part of the front wheel 3.
The front fender 13 is integrally provided in a protruding manner.

Next, the operation of the first embodiment shown in FIG. 1.2 will be explained. When the motorcycle is running, the bottom link 6.6 is connected to the shaft support 7, so that the front wheel 3 follows the unevenness of the running road surface. Swings up and down around 7 points, front cushion 9,
9 expands and contracts to buffer the impact from the road surface.

Thus, while the motorcycle is running, the front bumper 12 collides with an obstacle in front of the motorcycle before the front fender 13, thereby preventing the vehicle body B including the front fender 13 from being scratched or damaged. The front bumper 12 also functions as an auxiliary front fender, and a portion of muddy water, splashes, etc. thrown up from the road surface is blocked by the front bumper 12. In addition, the front bumper 12 is connected to the fork portion 5.
Since the left and right lower ends of the fork are connected, it also functions as a stabilizer, increasing the rigidity of the fork and preventing twisting and deformation.

Furthermore, the front bumper 12 can also be used as a hook, and by engaging a hook for sleeping transport with this, the motorcycle can be easily transported.

Next, a second embodiment of the present invention will be described with reference to FIGS. 3 and 4.

In this second embodiment, both the left and right ends of the U-shaped front punch 12 are supported by a pair of bottom links 6.6, and are integrally connected to the left and right rear surfaces of the fork portion 5 of the front fork F. The rear end of the bottom link 6.6 is pivotally supported 7, 7 on the extending stay 14° 14 so as to be able to swing up and down, and a front end provided on the middle part of the bottom link 6. The lower ends of the cushions 9.9 are connected 10.10. The front wheel 3 is attached to the axle 8 at the front end of the pair of bottom links 6.6.
Both ends of a front bumper 12, which extends in the front-rear direction across the front part of the front wheel 3, are integrally supported.

In this second embodiment, the vertical movement of the pair of bottom links 6.6 in conjunction with the vertical movement of the front wheels 3 causes the 70-ton damper 12 to move upward and downward.
moves up and down, but there is no difference in function and effect from the first embodiment.

FIG. 5 shows a third embodiment of the invention.

In this third embodiment, the present invention is applied to a telescopic suspension system in which a front fork F and a front wheel 3 are connected via a front cushion 9. is supported, and a front bumper 12 extending in the front-rear direction across the rear part of the front wheel i3 is integrally supported. This front bumper 12 protects the lower surface of the vehicle body B behind the front forks F, and has a particularly remarkable effect of blocking muddy water, splashes, etc. splashed up by the front wheels 3.

Effects of the C0 Invention As is clear from the above embodiments, according to the present invention, a U-shaped front bumper extending in the front and rear direction across the front wheel is supported at the lower part of the front fork. The front bumper protects the front of the vehicle body and prevents scratches and damage to the vehicle body due to collisions with obstacles.The front bumper also acts as an auxiliary front fender to protect the front part of the vehicle from muddy water and splashes thrown up by the front wheels. It also functions as a stabilizer for the front fork to increase its rigidity, and the hook can also be used as a tool when transporting this vehicle onboard. It has various effects.

[Brief explanation of the drawing]

Fig. 1.2 shows a first embodiment of the device of the present invention, Fig. 1 is a front side view of a seated motorcycle equipped with the device of the present invention, Fig. 2 is a perspective view of its front fork, Section 3.4
The figures show a second embodiment of the device of the present invention, FIG. 3 is a front side view of a seat-type motorcycle equipped with the device of the present invention, and FIG.
The figure is a perspective view of the front fork, and FIG. 5 is a side view of the front wheel suspension part of the front fork, showing a third embodiment of the device of the present invention. F...Front fork...Vehicle frame, 3...Front wheel, 4...Steering stem part, 5...Fork part, t2...Front bumper Patent applicant Honda Motor Co., Ltd. No. 4 Figure 3

Claims (1)

[Claims] a steering stem portion supported on the vehicle body frame in a steerable manner;
In a motorcycle equipped with a front fork including a fork part integrally provided at the lower part of the steering stem part and a front wheel suspended on the fork part, the lower part of the front fork straddles the front wheel. A front bumper device for a motorcycle, characterized by supporting a U-shaped front bumper extending in the longitudinal direction.