JPH0748471Y2 - Chain case integrated rear fender that swings with the rear swing arm - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a chain case integrated rear fender that swings together with a rear swing arm.

[Conventional technology and its problems]

As is often found on off-road bikes, some rear fenders are integrally attached to the seat rail frame of the body frame. However, in this case, it is necessary to secure a swing space below the rear fender that allows the rear wheels to swing up and down during traveling, so the rear wheels and the rear fender are largely separated from each other, and the rear fender is sufficiently removed. There were cases where it was not effective. Therefore,
For example, as seen in JP-A-62-54083, a rear fender is attached to a rear frame so that the rear fender also swings in accordance with the swing of the rear wheel,
There is one in which the distance between the rear wheel and the rear fender is kept constant in a narrow state.

However, in this case, the weight of the rear fender is added to the rear swing arm, which may impair the light movement of the rear swing arm as compared with the case of the rear swing arm alone. Also, in this main type, since the rear fender and the chain cover are integrally formed before they are assembled to the rear swing arm, there is a risk that the weight increases and the lighter movement of the rear swing arm is further impaired. there were. Moreover, in this case, since the chain cover is simply located on the side surface of the rear fender, not only the weight but also the size is considerably increased. Therefore, there is also a problem that it is difficult to assemble the rear fender rear swing arm with the chain cover integrated.

[Purpose of device]

The present invention was devised in consideration of the above conventional problems, and its purpose is to provide a chain cover integrated rear fender that swings together with a rear swing arm.
The weight of the chain cover integrated rear fender that is mounted on the rear swing arm is reduced so that the rear swing arm can be swung sufficiently, and the chain cover integrated rear fender to the rear swing arm is also provided. It is an object of the present invention to provide a chain case-integrated rear fender that swings together with a new rear swing arm that enables easy assembly of the.

[Means for achieving the purpose]

Therefore, in order to achieve the above object, the present invention swings together with a rear swing arm in which a chain case is integrally assembled to a mudguard attached to a rear swing arm formed by welding the front ends of a pair of left and right arms with a shaft cylinder. In the chain case integrated rear fender, the chain case integrated rear fender is welded to the rear end of the inclined upward reinforcing plate fixed to the front part of the left and right arms and the rear parts of the upper surfaces of the left and right arms. A U-shaped bridge pipe inclined downward to the rear and a mudguard mounted on the upper surface of the U-shaped bridge pipe are integrated through fastening means, and the mudguard is sandwiched between the front and rear sides of the one side surface portion. A front chain case and a rear chain case, which are located substantially flush with the mudguard, are provided with the inclined reinforcing plate and the rear chain case via fastening means. And U-shaped bridge pipes fixed to the mudguard and located on the line connecting the front chain case and the rear chain case with each other. The return side portion of the chain for driving the rear wheels is positioned on the line connecting the recess and the rear chain case.

[Function of device]

Therefore, according to the present invention, the front chain case and the rear chain case are located substantially flush with the mudguard in front of and behind one side surface of the mudguard with the mudguard sandwiched therebetween. The front chain case and the rear chain case can be attached to the mudguard. Therefore, the amount of protrusion in the vehicle width direction is suppressed.

Further, in this way, with the mudguard sandwiched therebetween, the front chain case is formed substantially flush with the mudguard before and after the one side surface portion,
Combined with positioning the rear chain case,
A cutout recess is formed in a portion of the U-shaped bridge pipe located on a line connecting the front chaincase and the rear chaincase, and the front chaincase, the cutout recess, and the rear chaincase are connected to each other. Since the return side part of the chain for rear wheel drive was positioned on the line,
The part of the return side part of the chain located between the front chain case and the rear chain case comes to be located in the mudguard. Therefore, since it also serves as a mudguard chain case, the weight is reduced and the size is reduced.

[Constitution of device]

 Hereinafter, the present invention will be described with reference to the embodiments shown in the drawings.

In the chain case integrated rear fender A, a mudguard 12 is attached to a rear swing arm 1 formed by welding the front ends of a pair of left and right arms 1 and 1r with a shaft cylinder 2, and the mudguard 12 is sandwiched between the front and rear sides. This is a chain case integrated type rear fender in which the rear fender swings together with the rear swing arm by integrally assembling the partial chain case 14 and the rear chain case 15.

A tilted reinforcing plate 6 that rises rearward is fixed to the front portions of the upper surfaces of the shaft cylinder 2 and the left and right arms 1 and 1r by welding. Then, the rear end r of the inclined reinforcing plate 6 and the left and right arms 1
The U-shaped bridge pipe 3 is welded to each rear part of the upper surface of 1r. At this time, in order to ensure the stability of the U-shaped bridge pipe 3 in the rear swing arm 1, both ends of the U-shaped bridge pipe 3 are obliquely cut, and the cut portions 3b are cut at the respective rear portions of the upper surfaces of the left and right arms 1.1r. , And the curved portion 3a are welded so as to correspond to the rear end 6r of the inclined reinforcing plate 6. In this way, the U-shaped bridge pipe 3 is inclined rearward and downward. Also, the upper surface of the U-shaped bridge pipe 3
On the 3u, a mudguard 12 having a U-shaped collar 13 is placed on the upper surface 3u with the collar 13 interposed therebetween. The collar 13 and the upper surface 3u of the U-shaped bridge pipe 3 are provided with a plurality of screws as fastening means.
The U-shaped bridge pipe 3 and the mudguard 12 are fastened and integrated by this. Further, as described above, the front chain case 15 and the rear chain case 14 that are substantially flush with the mudguard 12 are disposed in front of and behind the one side surface portion 12l with the mudguard 12 interposed therebetween. . The front chain case 15 and the rear chain case 14 are attached to the inclined reinforcing plate 6 and the mudguard 12 by a plurality of screws 17 as fastening means (the screws 17 relating to the front chain case 15 are omitted). It is fastened and integrated.

And the front chain case 15 and the rear chain case
The U-shaped bridge pipe 3 located on the line connecting 14
Notch recesses 5 are formed in the portion 3a of the front chain case 15, the notch recesses 5, and the rear chain case.
A chain 4 for driving the rear wheel 8 on the line connecting with 14
The return side portion 4a of the is positioned.

Reference numerals 9, 10 and 11 denote axles, a cushion unit, the lower end of the cushion unit 10 and the rear swing arm 1 which rotatably hinder the rear wheel 8, respectively.
This is a link for connecting and.

Thus, according to this embodiment, the rear swing arm 1
Is configured to expand and contract the cushion unit 10 via the link 11 around the shaft tube 2 and swing to cushion the rear wheel 8. The left and right swing arms 1 are connected to each other by a bridge pipe 3 at the rear part, and a reinforcing plate 6 is welded to the front part so that the torsional rigidity can be sufficiently high. Further, the bridge pipe 3 is not thin, and in this case, the weight can be reduced.

And the front chain case 6 and the rear chain case 14
Are located substantially flush with the mudguard 12 before and after the one side surface 12l with the mudguard 12 sandwiched therebetween, so that the front chain case 15 and the rear chain case 14 have the width dimension of the mudguard 12 Can be attached to 12. Therefore,
Since the amount of protrusion in the vehicle width direction can be suppressed to that extent, the size of the vehicle can be reduced.

In this manner, the front chain case 15 is substantially flush with the one mudguard 12 before and after the one side surface 12l with the mudguard 12 interposed therebetween.
In addition to positioning the rear chain case 14 and the rear chain case 14, the front chain case 15 and the rear chain case 14
The part of the U-shaped bridge pipe 3 located on the line connecting
A cutout recess 5 is formed in 3a, and the return side portion of the chain 4 for driving the rear wheels is along a line connecting the front chain case 15, the cutout recess 5 and the rear chain case 14. Since 4a is located, the part of the return side portion 4a of the chain 4 located between the front chain case 15 and the rear chain case 14 is located substantially in the mudguard 12. Therefore, since the mudguard 12 also serves as a chain case, the weight is reduced and the size is reduced. Therefore, a light swing of the rear swing arm 1 can be expected.

Also, since the mudguard 12 and the front and rear chain cases 15 and 14 are separate bodies before they are assembled to the rear swing arm 1, the weight of each component is smaller than when they were integrated from the beginning. Easy to assemble.

[Effect of device]

According to the present invention, the chain cover integrated rear fender that swings together with the rear frame can be easily assembled to the vehicle body.

[Brief description of drawings]

1 is a side view, FIG. 2 is a plan view, and FIG. 3 is an overall side view. (Explanation of symbols) A ... Chain case integrated rear fender, 1 ... Swing arm, 1 ... Left arm, 1r ... Right arm, 2 ... Shaft cylinder, 3 ... U-shaped bridge pipe, 3a ... Part (of U-shaped bridge pipe) , 3u ... upper surface (of U-shaped bridge pipe), 4 ... chain, 4a ... return side portion, 5 ... notched recess, 6 ... tilted reinforcing plate, 6r ... rear end, 8 ... rear wheel, 9
… Axle, 12… Mudguard, 12l… One side part, 14… Rear chain case, 15… Front chain case, 16… Fastening means, 17
… Fastening means

Claims (1)

[Scope of utility model registration request] 1. A chain case integrated rear fender that swings together with a rear swing arm in which a chain case is integrally assembled to a mudguard attached to a rear swing arm formed by welding the front ends of a pair of left and right arms with a shaft cylinder. The chain case-integrated rear fender is a U-shaped bridge pipe which is welded to the rear ends of the upwardly sloped reinforcing plates fixed to the front parts of the upper surfaces of the left and right arms and the rear parts of the upper surfaces of the left and right arms and slopes downward to the rear. And this U
A mudguard mounted on the upper surface of the character-shaped bridge pipe is integrated via fastening means, and the front chain is located substantially flush with the one mudguard in front of and behind one side surface of the mudguard. A case and a rear chain case are fixed to the inclined reinforcing plate and the mudguard via fastening means, respectively, and the U-shaped bridge pipe located on the line connecting the front chain case and the rear chain case A notch recess is formed in the portion, and the return side portion of the chain for driving the rear wheels is positioned on the line connecting the front chain case, the notch recess and the rear chain case. A chain case integrated rear fender that swings with the rear swing arm.