JPH04243679A - Axle metal fitting for rear fork of motorcycle - Google Patents

Abstract

PURPOSE:To carry out the stable installation by a machine screw and prevent the deformation of a reinforcing plate by forming the outside and inside of the reinforcing plate into integral form by bending the center part to a U-figure form and fitting the reinforcing plate into the upper and lower grooves on the inner and outer side surfaces of an axle metal fitting. CONSTITUTION:Each axle metal fitting 3 made of light alloy is inserted and welded at the left and right edges of a rear fork 1, and an elliptical hole 4 is formed on the axle metal fitting 3, and an axle 5 can be inserted. A groove 6 is formed in the longitudinal direction at the upper and lower parts on the inner and outside surfaces of the axle metal fitting 3. A reinforcing plate 7 is formed by integrally shaping the inside and outside by bending a steel plate into a U-figure form at the center, and an elliptical hole 8 is punched in conformity with the elliptical hole 4. The upper and lower edges of the reinforcing plate 7 are inserted from the rear side into the grooves 6 formed in the upper and lower parts of the inner and outer side surfaces of the axle metal fitting 3, and the rear edge is tightened on the axle metal fitting 3 by a machine screw 9. Accordingly, the installation position is made stable, and the installation of the reinforcing plate can be carried out in simple manner.

Description

[Detailed description of the invention]

0001

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

0002

[Prior Art] The front end of a motorcycle is pivoted to a frame to provide a rocking cushion, and then the rear wheel is fastened through an axle fitting welded to the rear end of the fork, through which the rear wheel is rotatably supported. I have to. In addition, the rear fork is made of light alloy to reduce its weight, and the axle fittings welded to the rear end of the rear fork are also made of the same light alloy. in this case,
When an axle is passed through a long hole provided in an axle metal fitting and tightened, the spacer portion, etc. that corresponds to the side surface of the axle metal fitting is tightly tightened, causing the side surface of the axle metal fitting, which is made of a soft material, to buckle. Therefore, reinforcing plates made of steel are stacked on the inner and outer surfaces around the elongated hole of the axle metal fitting to prevent the axle metal fitting from buckling. For example, see Japanese Utility Model Application Publication No. 57-143993.

0003

[Problem to be solved by the invention] Reinforcing plates are stacked on the inner and outer surfaces of the axle metal fittings and fixed with screws at two places, upper and lower, but the front and rear parts that are tightened to the axle tend to warp outward and become deformed. ,
If the axle is moved along the elongated hole for chain adjustment, etc., and the axle is tightened many times, the warpage increases and installation becomes difficult.

[0004] In view of the above, the present invention has been developed by forming reinforcing plates that overlap the inner and outer surfaces of the axle metal fitting into an integral piece bent into a U-shape at the center, and fitting the reinforcing plates into the grooves of the axle metal fitting to stabilize the structure with a single screw. To obtain an axle fitting for a rear fork of a motorcycle which can be installed and which can prevent a reinforcing plate from being warped and deformed by tightening the axle.

[0005]

[Means for Solving the Problems] In order to achieve the above object, the axle fitting of the rear fork of the motorcycle of the present invention is provided by welding an axle fitting provided with an elongated hole through which the axle passes through the rear end of the rear fork, Form longitudinal grooves on the top and bottom of the inside and outside surfaces of the axle metal fitting, and provide a reinforcing plate bent in a U-shape at the center. Insert and fit from the side, tighten the rear end of the reinforcing plate to the rear end of the axle fitting with screws, place spacers and chain adjusters on both sides of the reinforcing plate, and insert the axle into the long hole and tighten it. It is in.

[0006]

[Function] The reinforcing plate is made by bending the center into a U-shape so that the outer and inner parts are integrated, and it fits into the grooves provided on the top and bottom of the inner and outer sides of the axle metal fitting, so the grooves act as a guide and the reinforcing plate It can be held stably in place and fixed with a single screw at the rear end. Further, even if the reinforcing plate is tightened from both sides, the upper and lower edges of the reinforcing plate are fitted into the grooves of the axle metal fitting, so that it is possible to prevent the reinforcing plate from warping and deforming.

[0007]

Embodiments Hereinafter, embodiments of the present invention will be explained with reference to FIGS. 1 to 7. The rear fork 1 is made of light alloy, and is pivoted to the frame through a shaft hole 2 at the front end. Axle fittings 3 made of light alloy are inserted and welded to the left and right rear ends of the rear fork 1. The axle fitting 3 is provided with an elongated hole 4 in the center which is elongated laterally and longitudinally, so that the axle 5 can be inserted therethrough. Furthermore, grooves 6 are provided in the front and rear directions on the upper and lower sides of the inner and outer surfaces of the axle fitting 3. The groove 6 is
When casting the axle fitting 3, the casting mold can be pulled out to the rear to form the axle fitting 3. The reinforcing plate 7 is made of steel plate,
It is bent into a U-shape at the center, and the inner and outer parts are integrally formed, and a long hole 8 is punched out to match the long hole 4. The reinforcing plate 7 has grooves 6 provided at the top and bottom of the inner and outer sides of the axle fitting 3.
The upper and lower edges are inserted from the rear side and fitted, and the rear end is fastened to the axle fitting 3 with one screw 9.

[0008] The axle 5 pivotally supports a rear wheel hub in the center, and a spacer 10 is inserted through the outside thereof. Then, pass the end of the axle 5 through the long hole 4 of the axle fitting 3, and insert the
Spacer 10 passed through axle 5 and chain adjuster 1
1, and tighten the axle 5 with the nut 12.

[0009] The reinforcing plate 7 is bent into a U-shape at the center, and the inner and outer sides are integrally formed, and is inserted from the rear side into the grooves provided on the top and bottom of the inside and outside surfaces of the axle metal fitting. The mounting position is stable and can be fixed with a single screw. Further, since the upper and lower edges of the reinforcing plate 7 are fitted into the grooves, it is possible to prevent the reinforcing plate 7 from warping and deforming due to tightening.

0010

[Effects of the Invention] As explained above, since the present invention is configured as described above, the inner and outer sides of the reinforcing plate are integrally connected, and reinforcement is provided in the grooves provided on the upper and lower sides of the inner and outer surfaces of the axle fitting. Since the plate is fitted, the mounting position is stable, and it can be fixed with a single screw, making it easy to install the reinforcing plate. Furthermore, since the upper and lower edges of the reinforcing plate are fitted into the grooves of the axle metal fitting, it is possible to prevent the reinforcing plate from warping and deforming due to tightening.

[Brief explanation of the drawing]

1 to 7 show embodiments of the present invention,

[Figure 1]
FIG. 3 is a plan view of the rear hawk with one side of the axle metal fitting section cut out.

FIG. 2 is an outer side view of an axle metal fitting portion.

FIG. 3 is an inner side view of an axle metal fitting portion.

FIG. 4 is a rear view of the axle metal fitting portion.

FIG. 5 is a perspective view of a reinforcing plate.

FIG. 6 is an outer side view of the axle fitting portion to which the axle is attached.

FIG. 7 is a cross-sectional view of the axle fitting portion taken along the axle.

[Explanation of symbols]

1 Rear Hawk 3 Axle metal fittings 4 Long hole 5 Axle 6 Groove 7 Reinforcement plate 9 screws 10 Spacer 11 Chain adjuster

Claims (1)

[Claims] [Claim 1] An axle fitting with a long hole through which the axle is passed is welded to the rear end of the rear fork, and on the top and bottom of the inside and outside surfaces of the axle fitting,
A reinforcing plate is formed with a groove in the front-rear direction and bent into a U-shape at the center, and the upper and lower edges of both sides of the reinforcing plate are inserted from the rear side into the upper and lower grooves on the inner and outer surfaces of the axle metal fitting to provide reinforcement. A rear fork of a motorcycle characterized in that the rear end of the plate is fastened to the rear end of the axle fitting with screws, spacers and chain adjusters are placed on both sides of the reinforcing plate, and the axle is passed through a long hole and fastened. axle fittings.