JP3426853B2 - Front fender structure of motorcycle - Google Patents

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a front fender structure for a motorcycle.

[0002]

2. Description of the Related Art The front fender structure of a motorcycle is
It is generally composed of a fender main body having a U-shaped cross section mounted inside the left and right front fork pipes, and a reinforcing stay mounted inside the fender main body. This stay functions as a stabilizer, firmly connecting the left and right front fork pipes to each other to ensure stability during traveling, and also functions as a reinforcement for the front fender itself.

Conventionally, the stay is integrally joined to the fender main body in advance by using a rivet or the like, and the fender main body to which the stay is integrally joined is inserted between the front fork pipes and an application bolt is applied to the inner surface of the front fork pipe. It was fastened and fixed by
87 publication).

[0004]

However, in the above-mentioned conventional front fender, since the fender body and the stay are integrated, the worker holds both of them together when they are mounted inside the left and right front fork pipes. However, it was difficult to carry out the mounting work because the worker had to align it at a predetermined position and fix it to the inside of the left and right front fork pipes with bolts while holding the large fender body. It is conceivable to temporarily hold this large front fender on the front fork pipe by concavo-convex fitting, etc., but this stay has extremely high rigidity because it has a stabilizer function as described above, so it is left and right during the body assembly process. It is difficult to align the stay while bending the stay when mounting the stay at a predetermined position between the front fork pipes. On the other hand, if the stay is easily bent, the rigidity of the stay cannot be sufficiently secured, and the original stabilizer function of the stay may be impaired. Further, dedicated parts such as rivets for integrating the fender body and the stay were required.

The present invention has been made in view of the above-mentioned drawbacks of the prior art. It is easy to mount the right and left front fork pipes, and yet the rigidity and the stabilizer function of the front fender are ensured and the number of parts is small. The purpose is to provide a front fender structure for a motorcycle that can be completed.

[0006]

In order to achieve the above object, in the present invention, a fender body having a U-shaped cross section mounted inside the left and right front fork pipes and a U-shaped cross section mounted inside the fender main body. In the front fender structure of the motorcycle, which is composed of the reinforcement stays of 1 and 2, the protrusions are provided inside each of the left and right front fork pipes at two locations integrally with each front fork pipe.
In addition, a collar having substantially the same thickness as the wall thickness of the fender main body is provided so as to integrally project at the end portion of each protruding portion, and a hole having a smaller hole diameter than the protruding portion with which the collar fits is provided in the fender main body. Formed, bend the fender body inward, fit the hole of the fender body into the collar and temporarily hold it, insert the stay inside the fender body and match the collar, and bolt the stay A front fender structure for a motorcycle, wherein the stay is fixed to each of the left and right front fork pipes by penetrating and screwing into a collar.

According to the above construction, when mounting the front fender on the front fork pipe, first, the resin fender body is bent to fit the hole of the fender body into the collar provided on the front fork pipe. Hold the body of the fender inside the front fork pipe in the collar. Next, the stay is inserted into the inside of the fender body, and then the stay is fixed to the inside of the front fork pipe from the inner surface side of the collar with bolts.
At this time, since the fender main body and the collar have substantially the same thickness, it is possible to insert the fender main body into the inside of the fender main body as it is without bending the stay while holding the fender main body in the collar. Further, when the bolts are fastened, the collar serves as a spacer, the fastening force does not act on the fender body, and there is no risk of damaging the fender body. Also, because the fender body and stay are composed of separate parts, they can be attached to the front fork pipes separately, facilitating the attachment work and ensuring sufficient rigidity of the stay. Pre-integration work and parts such as rivets are unnecessary. The color is flow
Integral with the end of the protruding part that is integral with the fork fork pipe
It is provided in. Holes in the fender body are the external dimensions of the protrusion
Because it is smaller, the fender body does not hang on the protrusion.
Fit the collar on the end of the dam.

[0008]

DETAILED DESCRIPTION OF THE INVENTION In the preferred embodiment,
The fender body is made of synthetic resin, the stay is characterized by a metal material or Rana Rukoto.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a side view of a motorcycle to which a front fender structure according to the present invention is applied. The body frame of the motorcycle 1 has a head pipe 3 which penetrates the steering shaft 2, a down tube (main pipe) 4 which fixes the head pipe 3, and an engine 5 and a main stand 7 which are fixed to the down tube 4. Bracket frames 6 and 8, a seat hinge pipe 11 that rotatably supports a seat 10, a bracket frame (upper gusset) 9 that supports the seat hinge pipe, a pair of left and right rear upper pipe frames 12 that supports a fuel tank (not shown), the bracket The frame (lower gusset) 8 and the rear upper pipe frame 12 are connected by a pair of left and right rear lower pipe frames 13 and the like.

An angle-shaped vertical pipe 72 is welded and fixed to the rear end of the down tube 4 (almost the center of the vehicle body). For this vertical pipe 72, upper gusset (bracket frame) 9 and lower gusset (bracket frame)
8 is welded and fixed. A cushion 71 is mounted between the vertical pipe 72 and a bracket 74 fixed to the rear arm 22. Further, a footrest 73 for a tandem rider is attached to the rear lower pipe frame 13.

The rear end portions 12a of the left and right rear upper pipe frames 12 are bent upward, and the left and right rear end portions 12a thereof are bent.
The rear bracket 50 is fixed in between. A grab bar 41 for a tandem rider is attached to the rear bracket 50. 43 is a tail lamp. Sheet 10
Is attached rotatably around a shaft 11a at the upper end of a seat hinge pipe 11 welded and fixed to the upper surface of the upper gusset 9. The lower left and right sides of the seat 10 are covered with rear side covers 70. Upper pipe frame 12 on the left side of the vehicle
The handle part 1 for lifting the vehicle body is on the slightly rear side.
2b is formed.

The vehicle body frame is made of a metal material such as steel or aluminum and is entirely covered with a vehicle body cover 14 made of a synthetic resin that can be divided into a plurality of parts in the front, rear, left and right directions. The upper and lower ends of the steering shaft 2 are fixed to the handle crown 15. The handle 16 is connected to the front fork pipe 17 via the handle crown 15. The front fork pipe 17 supports the front wheel 18 from both left and right sides, and changes the direction of the front wheel 18 in conjunction with the operation of the handle 16. The front of the handle 16 is covered with a cowling 19, and a headlight 20 is attached to the cowling 19. Below the rear lower pipe frame 13 of the vehicle body frame, a rear arm 22 that pivots up and down around a pivot shaft 75 provided in the lower gusset 8 and supports the rear wheel 21 at the rear end is connected. The rear wheel 21 is connected to the engine 5 via a chain (not shown) and is rotationally driven. The chain is covered with a chain cover 23.

An upper portion of the front wheel 18 is covered with a front fender 24 made of synthetic resin mounted inside the left and right front fork pipes 17, and an upper portion of the rear wheel 21 is covered with a rear fender 25 also made of synthetic resin. The engine 5 is laterally covered with an under cowl portion 27 that is integral with the front side cover 26 of the vehicle body cover 14. This resin front side cover 26
A rear side cover 70 made of resin is also attached to the rear side.

FIG. 2 is a side view of the front wheel portion including the front fender according to the present invention. The structure of the front fender 24 is composed of a synthetic resin fender main body 28 having a U-shaped cross section mounted inside the left and right front fork pipes 17, and a metal reinforcing stay 29 mounted inside the fender main body 28. The fender body 28 covers almost the entire upper portion of the front wheel 18, while the stay 29 covers only the upper portion of the front wheel 18 located inside the front fork pipe 17.
Further, the front wheel 18 is attached to the lower end of the front fork pipe 17.
The brake device 30 that engages with the disc of the hub is mounted.

FIG. 3 is a sectional view taken along the line AA of FIG. 2 (note that the figure shows only the fork pipe portion on the left side of the vehicle body). As shown in the drawing, a collar 32 is provided so as to integrally project with the inside of each of the left and right front fork pipes 17. This collar 32 is the fender body 2
The thickness is approximately the same as that of No. 8 and has a screw hole 170 at the center. On the other hand, a hole 171 into which the collar 32 is fitted is formed in the fender body 28. The stay 29 is fixed to the left and right front fork pipes 17 from the inner surface of the collar 32 by bolts 34 as fastening means, with the holes of the fender main body 28 fitted in the collar 32.
Further, a wire holder 35 for holding a wire such as a speedometer is inserted into the fender body 28.

FIG. 4 is a cross-sectional view of a main part in which front fenders are mounted inside the left and right front fork pipes. The structure of the front fender includes a fender main body 28 having a U-shaped cross section and a reinforcing stay 29 having a U-shaped cross section which is separate from the fender main body 28. To attach the front fender to the front fork pipe 17, first, the synthetic resin fender main body 28 is bent inward to make it slightly narrower,
The hole of the fender body 28 is fitted into the collar 32 on the front fork pipe 17 side. At this time, since the fender main body is made of resin, it can be bent relatively easily.
Further, the stay 29 to be mounted later can be placed and held on the upper portion of the front wheel, which improves workability in a work site where tools and parts are scattered.

Next, the stay 29 is inserted into the inside of the fender main body 28 and moved along the front wheel 18, so that the bolt penetrating hole 172 thereof is aligned with the screw hole 170 of the collar 32. When they are matched, the bolt 34 is passed through the bolt penetrating hole 172 of the stay 29 and the screw hole 170 of the collar 32.
The front fender 24 including the fender body 28 and the stay 29 is fastened and fixed to the inside of the front fork pipe 17. As a result, the fender main body 28 and the stay 29 are connected via only the four bolts 34. With such a configuration, since the fender body 28 and the collar 32 have substantially the same thickness, the collar 32 serves as a spacer, and the fastening force of the bolt 34 does not act on the fender body 28 at the time of fastening, which may cause damage. There is no. Further, since only the fender main body is mounted on the collar first and temporarily held, the stay can be inserted and aligned without being bent afterwards, which facilitates the work. Further, since the fender main body 28 and the stay 29 are configured as separate parts, they can be attached to the front fork pipes 17 separately, which facilitates the attachment work and allows them to be integrated in advance as in the conventional case. No need for parts for work and integration such as rivets.

[0018]

As described above, according to the present invention, the fender body and the stay are formed of different members,
It can be mounted inside the left and right front fork pipes separately, and the workability of mounting on the front fork pipe is significantly improved compared to the conventional front fender in which the fender body and stay are integrated. In addition, compared to the conventional front fender in which the fender body and stay are previously integrated with dedicated parts such as rivets, the work for integration is unnecessary and manufacturing is easier, and only the parts that do not require special parts are provided. The score can be reduced. Further, the stay can have high rigidity, and the stabilizer function of the front fork pipe and the reinforcing function of the fender body can be sufficiently ensured. Further, when the breakage occurs, only the main body of the fender needs to be replaced, the usable stay need not be wastefully discarded, resource saving can be achieved, and the replacement cost can be kept low.

[Brief description of drawings]

FIG. 1 is a side view of a motorcycle to which a front fender according to the present invention is applied.

FIG. 2 is a side view of a front wheel portion of the motorcycle shown in FIG.

3 is a cross-sectional view taken along the line AA of FIG.

FIG. 4 is a cross-sectional view of a main part in a state where front fenders according to the present invention are mounted inside the left and right front fork pipes.

[Explanation of symbols]

1: Motorcycle, 2: Steering shaft, 3: Head pipe, 4: Down tube, 5: Engine, 6: Bracket frame, 7: Main stand, 8: Bracket frame, 9: Bracket frame, 10: Seat,
11: Seat hinge pipe, 12: Upper pipe frame, 13: Lower pipe frame, 14: Body cover, 1
5: Handle crown, 16: Handle, 17: Front fork pipe, 18: Front wheel, 19: Cowling, 2
0: Headlight, 21: Rear wheel, 22: Rear arm, 2
3: Chain cover, 24: Front fender, 25:
Rear fender, 26: front side cover, 27: under cowl portion, 28: fender body, 29: stay, 3
0: Brake device, 32: Collar, 34: Bolt, 3
5: Wire holder, 170: Screw hole, 171: Hole, 1
72: Bolt penetration hole.

Claims (2)

(57) [Claims] Claim: What is claimed is: 1. A front fender structure for a motorcycle, comprising a fender body having a U-shaped cross section mounted inside the left and right front fork pipes, and a reinforcing stay having a U-shaped cross section mounted inside the fender body. Inside each front fork pipe, two protrusions are provided integrally with each front fork pipe.
Together with this, a collar having substantially the same thickness as the thickness of the fender main body is provided so as to integrally project at the end of each projection, and a hole having a smaller diameter than the projection into which this collar fits is formed in the fender main body. Then, while bending the fender body inward and fittingly holding the hole of the fender body in the collar, the stay is inserted inside the fender body so that the stay matches the collar, and the bolt penetrates the stay. A front fender structure for a motorcycle, wherein the stay is fixed to the left and right front fork pipes by being screwed into a collar. 2. The fender body is made of synthetic resin, and the stay is made of a metal material.
Front fender structure for motorcycles described in.