JP2558833Y2 - Hawk axle bracket after motorcycle - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a rear axle bracket for a motorcycle.

[0002]

2. Description of the Related Art A motorcycle has a front end pivotally attached to a vehicle body frame so as to be rocked and then fastened to an axle bracket welded to a rear end of a fork through an axle which rotatably supports a rear wheel. Like that. The rear fork is made lighter by using a light alloy or the like, and the axle metal fitting to be welded to the rear end of the rear fork is also made of a light alloy. In this case, when the axle is fastened to the elongated hole provided on the side of the axle through the axle, the inner and outer surfaces of the axle bracket against which the spacer cylinder inserted into the axle and the nut to be fastened to the axle abut are buckled. Therefore, a reinforcing plate made of a steel plate is overlapped on both sides of the long hole of the axle bracket, and the spacer tube and the nut are received by the reinforcing plate to prevent buckling. See, for example, Japanese Utility Model Laid-Open No. 57-143993.

[0003]

[Problems to be solved by the invention] The reinforcing plate is screwed to the axle bracket at the upper and lower two places, but before and after the axle is tightened, it warps outward and the length is increased by adjusting the chain. This is inconvenient when the axle is moved in the front-rear direction of the hole and tightened. In addition, since the reinforcing plate is overlaid on the axle bracket, the assembling work is troublesome.

[0004] In view of such a point, this invention fixes a reinforcing plate to be superimposed on the inner surface of the axle bracket with one screw,
An object of the present invention is to provide a rear axle axle bracket for a motorcycle in which upper and lower edges are inserted into grooves to prevent deformation.

[0005]

In order to achieve the above object, a rear axle bracket of a motorcycle according to the present invention is provided with a pair of right and left rear forks for axially attaching a shaft hole formed in a front portion to a vehicle body frame. At each rear part, an axle bracket main body provided with an elongated hole penetrating in the vehicle width direction is welded, an axle of a rear wheel is erected between the elongated holes, and the axle is tightened axially with a nut to form a rear wheel. In the rear fork of the motorcycle supported by the rear fork, a constant cross-sectional shape is formed on the inner surface of each axle bracket main body from the rear end toward the front over a predetermined range including the formation position of the long hole. Along with forming a fitting portion to be formed, a reinforcing plate having an axle hole which is removably fitted to the fitting portion and which can be matched with the long hole in the fitted state is provided, and the fitting portion is Form a U-shaped concave part of the rear end release on the inner surface, The upper and lower surfaces of the U-shaped recess extend in the front-rear direction and one side surface is formed with a groove that is flush with the side surface of the U-shaped concave portion, and the reinforcing plate is simultaneously formed in both grooves of the fitting portion. After the upper and lower edges of the reinforcing plate are inserted from the released rear ends of the two grooves, and the long hole and the axle hole are aligned. The reinforcing plate is fixed to the axle bracket main body with one screw in a state where the side surface of the U-shaped concave portion and one side surface of the reinforcing plate are in contact with each other.

[0006]

As described above, in the present invention, the axle bracket body supporting the axle is formed with a U-shaped concave portion having a rear end portion opened, and grooves are formed on both upper and lower surfaces thereof. Since the rear end is also in the released state, the reinforcing plate can be inserted from the rear end of the groove. And
Since one side surface of the groove is flush with the side surface of the U-shaped recess, one side surface of the reinforcing plate inserted therein comes into contact with the side surface of the U-shaped recess. Therefore, even when the axle inserted through the U-shaped concave portion and the reinforcing plate is fastened to the U-shaped concave portion with a nut, as described above, one side surface of the reinforcing plate contacts the U-shaped concave portion, and Since both edges are inserted into the grooves, the reinforcing plate does not warp. Also, since the upper and lower edges of the reinforcing plate are inserted into the grooves, a stable fixing state can be obtained with only one screw.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. The rear fork 1 is made of a light alloy and has a shaft hole 2 at the front end.
To the body frame. An axle metal fitting body 3 made of a light alloy is inserted and welded to the left and right rear ends of the rear fork 1. The axle bracket main body 3 is provided with a long hole 5 through which the axle 4 passes in the center. The inner surface 3a of the axle metal fitting 3 is formed with a fitting portion 60 having a constant cross-sectional shape from the rear end to the front end.
Is included. The fitting portion 60 is formed on the inner surface 3a of the axle bracket main body 3 with a U-shaped concave portion 6 having a rear end portion opened.
1 and the upper and lower surfaces 61a, 6 of the U-shaped concave portion 61 are formed.
1b, grooves 62a and 62b extending in the front-rear direction are formed. The grooves 62a and 62b are formed at left and right positions such that one side surface is flush with the side surface 62c of the U-shaped concave portion 61.
Can be formed by a mold material that is formed by pulling out the axle bracket body 3 in the front-rear direction.

Further, a reinforcing plate 7 made of a steel plate is provided in the fitting portion 60 so as to be insertable and removable. The reinforcing plate 7 has a vertical width and a thickness that can be simultaneously fitted into the grooves 62a and 62b.
An axle hole 8 is formed by punching. The reinforcing plate 7 is inserted with its upper and lower edges 7a, 7b from the open rear ends of the grooves 62a, 62b so that the elongated hole 5 and the axle hole 8 are aligned. As described above, one side surface 7c of the groove 62a, 62b is flush with the upper and lower surfaces 61a, 61b of the U-shaped concave portion 61. It comes into contact with one side surface of the concave portion 61. Here, the reinforcing plate 7 is fastened and fixed to the axle bracket main body 3 by one screw 9.

The axle 4 rotatably supports the hub 10 of the rear wheel. Then, the spacer cylinder 11 is inserted into the axle 4 on both sides of the hub 10. On one side, the base of the support arm 13 of the brake caliper 12 is also used as a spacer cylinder. The axle 4 passes through the long hole 5 of the axle bracket 3 on both sides,
Spacer cylinder 11 or arm 1 that also serves as spacer cylinder
3 is applied to the reinforcing plate 7. And the axle bracket body 3
A chain adjuster 14 passed through the axle 4 is applied to the outside of the axle 4, and a nut 15 is screwed into a tip of the axle 4 and fastened.

Since the upper and lower edges of the reinforcing plate 7 are inserted into the grooves 7 of the axle bracket main body 3, the reinforcing plate 7 can be fixed stably with one screw 9. Further, the spacer plate 11 or the base of the support arm 13 of the brake caliper 12 which also serves as the spacer tube is applied to the reinforcing plate 7 and fastened, but the upper and lower sides of the reinforcing plate 7 are inserted into the grooves 7. Moreover, since the reinforcing plate 7 is in a state where one side surface 7c is in contact with one side surface of the U-shaped concave portion 61, the reinforcing plate 7 does not warp, and the deformation of the reinforcing plate 7 can be prevented.

[0011]

As described above, since the present invention is constructed as described above, the reinforcing plate to be overlapped on the inner surface of the axle bracket is inserted into the grooves provided above and below the axle bracket main body. Stable fixing is possible, and positioning during assembly can be easily performed. Also, since the upper and lower edges of the reinforcing plate are inserted into the grooves and one side surface of the reinforcing plate is in contact with one side surface of the U-shaped concave portion, the reinforcing plate is warped and deformed by tightening the spacer. Can be prevented.

[Brief description of the drawings]

 1 to 6 show an embodiment of the present invention.

FIG. 1 is an exploded inner perspective view of an axle bracket part.

FIG. 2 is an outer side view of an axle bracket.

FIG. 3 is an inner side view of an axle bracket part.

FIG. 4 is a rear view of an axle bracket part.

FIG. 5 is a plan view of a rear fork.

FIG. 6 is a sectional view taken along the axle.

[Explanation of symbols]

 Reference Signs List 1 rear fork 2 shaft hole 3 axle bracket main body 4 axle 5 long hole 6 groove 7 reinforcing plate 7a upper edge 7b lower edge 7c one side 8 axle hole 9 screw 11 spacer cylinder 15 nut 60 fitting portion 61 U-shaped concave portion 61a Upper surface 61b Lower surface 61c Side surface 62a Groove 62b Groove

Claims (1)

(57) [Scope of request for utility model registration] An elongated hole (5) penetrating in the vehicle width direction is provided at a rear portion of each of a pair of left and right rear forks (1) for axially attaching a shaft hole (2) formed at a front portion to a vehicle body frame. The axle bracket body (3) is welded, a rear wheel axle (4) is bridged between the slots (5), and the axle (4) is tightened in the axial direction with a nut (15) to rearward the rear wheel. In the rear hawk of the motorcycle supported by the hawk (1), the inner surface (3a) of each axle bracket main body (3) includes a position where the elongated hole (5) is formed forward from a rear end thereof. A fitting portion (60) having a constant cross-sectional shape over a predetermined range;
And a reinforcing plate (7) provided with an axle hole (8) which is removably fitted to the fitting portion (60) and which can be matched with the elongated hole (5) in the fitted state. The fitting portion (60) forms a U-shaped concave portion (61) having a rear end portion opened on the inner side surface (3a), and the U-shaped concave portion (6) is formed.
Grooves (62a) and (62b) extending in the front-rear direction with respect to the upper and lower surfaces (61a) and (61b) and having one side surface flush with the side surface (61c) of the U-shaped concave portion (61). The reinforcing plate (7) is provided with both grooves (62) of the fitting portion (60).
a) and (62b) having an upper and lower width and a thickness that can be simultaneously fitted to the upper and lower edges (7a) and (7b) of the reinforcing plate (7). 62b), the slot (5) is aligned with the axle hole (8), and the side surface (61c) of the U-shaped recess (61) and the reinforcing plate (7) are inserted. A) The reinforcing plate (7) is fixed to the axle bracket body (3) with one screw (9) in a state where the side surface (7c) is in contact with the one side (7c). Rear Hawk axle bracket.