JPS6135514Y2 - - Google Patents

Description

[Detailed explanation of the invention] This invention is designed to prevent mud flying from the rear wheels from being removed by the rear wheel shock absorber.
This invention relates to a motorcycle mudguard device for preventing mud from sticking to air cleaners and other equipment.

In motorcycles, in order to absorb and buffer the vertical movement of the rear wheel that follows the undulations of the road surface, one end of the shock absorber is connected to the body frame, and the front end of the shock absorber is connected to the body frame so that it can swing vertically. The rear wheel shock absorber is connected directly or via a link mechanism to the rear fork for supporting the rear wheel, which is pivotally connected to the rear fork. and the link mechanism. If a shock absorber that expands and contracts when rear wheels are buffered is placed at or near the center in the width direction of the vehicle, it is necessary to attach a part of the rear shock absorber to the vehicle frame in order to connect the shock absorber and the rear fork. It is necessary to penetrate the fixed rear fender and protrude between the rear fender and the rear wheel. According to this, it is necessary to provide a notch in the rear fender for partially penetrating the rear fender, and the notch allows the space between the rear fender and the rear wheel to communicate with the external space of the rear fender, so that the rear fender can communicate with the outside space of the rear fender. The mud thrown up and scattered from the rear wheels leaks into the external space of the rear fender through the notch and is scattered. The above-mentioned shock absorbers are arranged in the external space, and equipment such as air cleaners may also be arranged. Therefore, it is necessary to individually apply mud prevention measures to these shock absorbers, air cleaners, etc. This results in a complicated structure and increased costs.

The present invention was developed in view of the above points, and the purpose of the present invention is to prevent mud flying from the rear wheels from leaking and scattering into the external space of the rear fender. This product eliminates the need for individual anti-dirt measures for each device, simplifies the structure of the rear wheel shock absorber and the devices placed around it, and reduces costs. This is where we provide the equipment.

A preferred embodiment of the present invention will be described below in detail with reference to the accompanying drawings.

FIG. 1 is an overall side view of a motorcycle to which a device according to the present invention is applied, and FIG. 2 is a partially cross-sectional view of the main part of FIG. 1. The vehicle body frame 2 on which the engine 1 is mounted consists of a main frame 3, a down tube 4, a seat rail frame 5, etc. The front end of a rear fork 6 is pivotally connected to the vehicle body frame 2 by a pivot shaft 7 so as to be able to swing vertically. A rear wheel 8 is supported by bearings on the rear end of the wheel 6. A rear fender 10 is provided on the upper outer periphery of the rear wheel 8, and the rear fender 10 is fixed to the seat rail frame 5. Rear wheel shock absorber 1
1 is arranged at or near the center in the width direction of the vehicle body, and the front end of the shock absorber 11 is connected to the main frame 3.
It is connected to the rear end bracket 3a by a shaft 12 so as to be able to swing up and down, and the connection between the rear fork 6 and the rear end of the shock absorber 11 is by a progressive link mechanism 1 in this embodiment.
3.

The progressive link mechanism 13 consists of a first link 14 and a second link 15 as shown in FIG.
The lower end of the first link 14, which has a substantially vertically elongated side surface, is the shaft 1.
6, and the upper end of the first link 14 is connected to the buffer 1.
1 by a shaft 17. 2nd link 15
The rear end and the upper and lower intermediate parts of the first link 14 are the shaft 18
The front end of the second link 15 is connected to a bracket 19 fixed to the vehicle body frame 2 by a shaft 20.

The above buffer 11 and progressive link mechanism 1
3 constitutes the rear wheel shock absorber 21 in this embodiment.

When the rear fork 6 swings upward about the pivot shaft 7 to cause the rear wheel 8 to move up and down following the undulations of the road surface, the first link 14 moves forward and upward to compress the shock absorber 11. During the operation, the first link 14 is connected to the vehicle body frame 2 by the second link 15 which draws an arcuate trajectory around the shaft 20.
Since the distance between the first link 14 and A buffer 11 that buffers
The buffering force characteristic becomes a progressive characteristic in which the buffering force gradually increases as the amount of rocking of the rear fork 6 increases.

In addition, as shown in the illustrated example, the connection part A by the shaft 18 and the shaft 2
The line segment A-B connecting the connection part B by 0 is defined as the axis 16
The amount of rotation of the first link 14 is suppressed to a small level by making the side surface substantially parallel to the line segment C-D connecting the connecting portion C by the pivot shaft 7 and the connecting portion D by the pivot shaft 7.
By approximately parallel movement of the first link 14, the shock absorber 11
can be compressed.

When the above buffering force is generated, the shock absorber 11 operates to expand and contract, and the first link 14 performs an operation during substantially parallel movement. Since these operations are performed at the same position as the front lower part 10a of the rear fender 10,
In order to allow the shock absorber 11 and the first link 14 to operate without interfering with the rear fender 10, a notch 22 is provided in the rear fender lower part 10a.
A part of the rear wheel shock absorber 21, that is, in this embodiment, the rear wheel of the shock absorber 11 and the first link 14 pass through the rear fender 10 through the notch 22 to connect the rear wheel 8 and the rear fender 10. Allow it to protrude into the space _S1 between. As shown in FIG. 4, the notch 22 is formed at the center of the rear fender lower part 10a with an appropriate cutting depth upward from the lower end 10b. The first link 14 and the rear fender lower part 10a are connected by a mud blocking rail member 23, thereby sealing between the rear wheel of the rear fender 10 and the shock absorber 11 and the first link 14. The sealing member 23 is used to create a closed state.

Specifically, the sealing member 23 has a plate-shaped portion 23a.
and a bellows portion 23b integrally provided on the outer peripheral side of the plate-like portion 23a, and is molded from a flexible material such as rubber. The plate-shaped portion 23a is formed to have approximately the same area as the notch 22, and is fixed to the rear surface of the first link 14 with bolts 24, 24. The outer end of the bellows part 23b is connected to the rear fender lower part 10 on the outer periphery of the notch 22.
It is fixed to a by gluing, screwing, or other methods. The sealing member 23 may be manufactured by separately molding the plate-shaped portion 23a and the bellows portion 23b from different materials and joining these 23a and 23b.

From the above structure, the space _S1 between the rear wheel 8 and the rear fender 10, which was in communication via the notch 22, and the external space _S2 of the rear fender 10 are cut off by the seal member 23. Therefore, the rear wheel of the shock absorber 11 and the first link 14, which were protruding into the space _S1 as a part of the rear wheel shock absorber 21, are located in the external space.
It will be placed on the _S2 side.

Therefore, when mud is scattered from the rear wheel 8 while the motorcycle is running, the mud leaks into the external space _S2 of the rear fender 10 from the notch 22 by the seal member 23, which also serves as a part of the rear fender 10. It is possible to prevent mud from spilling out, and the equipment such as the shock absorber 11 and progressive link mechanism 13 disposed in the space S ₂ , as well as the air cleaner 25 and battery 26 as shown in Figs. 2 and 3, are individually mud-proofed. There is no need to take any countermeasures, and the seal member 23 functions as a mud-proof member for all devices. Further, the sealing member 23 is attached to the bellows portion 2.
3b has flexibility, the buffer 1
The first link 14 follows operations such as expansion and contraction and approximately parallel movement of the first link 14. Further, as shown by the dashed line in FIG. 2, when the rear fork 6 swings upward, the first link 14 moves forward from the rear of the notch 22, so the bellows portion 23b is reversed, and the bellows portion 23b Mud etc. attached to the seal member 23 can be easily removed, the seal member 23 operates smoothly, and its durability is improved.

Furthermore, since the rear end of the shock absorber 11 is brought as close as possible to the rear wheel, the front end of the shock absorber 11 can be installed at a lower position, and the center of gravity of the vehicle body can be lowered.

As is clear from the above explanation, according to the present invention,
Even if the rear fender is formed with a notch for penetrating a part of the rear wheel shock absorber, the gap between the part and the rear fender is sealed by the mud-blocking seal member, and the notch is closed. It is possible to prevent mud from leaking into the external space of the rear fender. In addition, since the seal member moves back and forth in the notch due to the swing of the rear fork, the bellows part in particular is repeatedly reversed, making it possible to remove dirt, etc. that has adhered to it, making the seal member operate smoothly and improving durability. It has the following effects.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, and FIG. 1 is an overall side view of a motorcycle, FIG. 2 is a partially cross-sectional view of the main part of FIG. 1, and FIG. 3 is a diagram showing FIG. 2. FIG. 4 is a plan view of FIG. 1 taken along arrow 4 of FIG. In the drawing, 8 is the rear wheel, 10 is the rear fender, 1
1 is a shock absorber, 21 is a rear wheel shock absorber, 22 is a notch, and 23 is a seal member.

Claims (1)

[Claims for Utility Model Registration] A motorcycle in which a shock absorber is disposed in front of a rear fender, and a link mechanism is interposed between the rear end of the shock absorber and the rear fork, comprising: a rear end of the shock absorber and the rear fork; a first link in the link mechanism that is rotatably connected to the shock absorber, passes through a notch formed in the front part of the rear fender together with the rear end of the shock absorber, and projects toward the rear wheel side along the notch; a second link in the link mechanism that is disposed in front of the rear fender and is rotatably directly connected between the first link and the vehicle body frame; and a second link that is fixed to the rear surface of the first link and that is connected to the rear fork. A plate-shaped part that penetrates the notch back and forth by swinging upward and moves forward of the notch, and a bellows part fixed between each outer periphery of the plate-shaped part and the notch. 1. A mudguard device for a motorcycle, comprising a sealing member.