JPH0628391Y2 - Mounting structure of the bearing holder for the rear axle of the vehicle - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a mounting structure for a bearing holder for a rear axle of a vehicle having a swing arm such as a motorcycle, a three-wheeled vehicle and a four-wheeled vehicle.

[Conventional technology]

A conventional three-wheeled motor vehicle is, for example, the actual Kaisho 58-18168.
As disclosed in Japanese Patent Publication No. 9, a pipe material is fixed to a rear end of a swing arm which has a front end pivotally attached to a vehicle body frame and is vertically swingable, and a flange is provided at both ends in the pipe material. A bearing holder formed with an eccentric hole is inserted and fitted to support both flanges on the inner surfaces of both ends of the pipe material, and a rear axle is rotatably inserted and supported in the eccentric hole.

[Problems to be Solved by the Invention] However, in the bearing holder, both flanges are formed integrally with the bearing holder, and a flange portion having a larger diameter than the flange is formed at the outer end of one flange.

For this reason, when inserting the bearing holder into the pipe material, the flange is not inserted into the pipe material, and the flange portion is abutted against one end edge of the pipe material, and the flange portion is formed. A retaining ring is engaged with the end portion on the side of the flange that is not present via a caliper stay, and the bearing holder is retained and retained on the pipe material by the retaining ring and the flange portion.

Therefore, since the bearing holder is inserted from one end to the other end of the pipe member from the flange side where the flange is not formed, the pipe member has to be formed in a cylindrical shape.

Therefore, according to the present invention, by forming one of the two flanges of the bearing holder as a separate body, the bearing holder is inserted from either side of the pipe material from the side where the flange is not formed. It is an object of the present invention to provide a mounting structure for a bearing holder for a rear axle of a vehicle, which can be assembled and can be made smaller by denting the central portion of the pipe material to reduce the diameter.

[Means for Solving the Problems]

In order to achieve the above object, the present invention has a pipe material fixed to the rear end of a swing arm whose front end is pivotally attached to a vehicle body frame and is vertically swingable, and flanges are provided at both ends in the pipe material. In addition, a bearing holder formed with an eccentric hole is inserted and fitted to support both flanges on the inner surfaces of both ends of the pipe material, and a rear axle is rotatably inserted and supported in the eccentric hole. In the mounting structure of a bearing holder for an axle, the pipe material is formed by a large diameter portion on both sides for supporting both flanges and a central small diameter portion between the large diameter portions on both sides, and one of the two flanges of the bearing holder is formed. The flange is formed separately from the bearing holder, and when the bearing holder is assembled, the separate flange is fitted and fixed to one end of the bearing holder.

[Action]

According to the above configuration, the bearing holder is inserted from one end side of the pipe material from the side where the flange is not formed, and the flange inserted from the other end side of the pipe material is the flange of the bearing holder. The bearing holder can be assembled to the pipe material by fitting and fixing the end portion on the side where the groove is not formed.

Therefore, the central portion of the pipe material can be formed to have a small diameter, which can reduce the weight of the swing arm.

〔Example〕

An embodiment in which the present invention is applied to a motorcycle will be described below with reference to the drawings.

In the motorcycle 1 shown in FIGS. 1 and 2, a head pipe 3 is fixed to a front end of a body frame 2, a handle 6 is attached to a top bridge 4, and a front fork is attached to the top bridge 4 and the bottom bridge 5. An upper portion of the front fork 7 is fixedly inserted, a front wheel 8 serving as one steering wheel is rotatably supported at a lower end of the front fork 7, and both bridges 4 and 5 are steerably provided on the head pipe 3.

On the other hand, a fuel tank 9 is provided behind the head pipe 3,
A seat 10 is arranged further rearward, and an engine 11 is mounted on the vehicle body frame 2 below the fuel tank 9.

Further, the front end of a swing arm 12 whose details are shown in FIG. 3 and FIG.
Rear wheels 15, 15 for driving are fixed to both ends of a rear axle 14 which is rotatably inserted in the rear end of the rear wheel 2.

A driven sprocket 16 is fitted to one end of the rear axle 14, and a drive chain 18 is provided between the driven sprocket 16 and a small-diameter drive sprocket 17 fitted to an end of an output shaft (not shown) of the engine 11. Is stretched. A disc rotor 19 is fitted on the other end of the rear axle 14.

A bearing holder pipe (pipe material) 20 is fixed to the rear end of the swing arm 12 as shown in FIGS. The bearing holder pipe 20 includes large-diameter portions 20a, 20a on both sides and sloping wall portions 20b, 2 following the large-diameter portions 20a, 20a.
0b and a central small-diameter portion 20c connected thereto, and the large-diameter portions 20a, 20a on both sides of the slanted wall portion 20.
slits 2 in the axial direction of the rear axle 14 extending from b to 20b
0d is formed, brackets 21a and 21b for bolt tightening are provided above and below the horizontal portion of each slit, and a through hole into which a bolt is screwed is formed in both brackets 21a and 21b. The attached bolt 22 is inserted and screwed.

A bearing holder 23, which is formed with an eccentric hole 23a that is eccentric from the center of the holder pipe 20 and has flanges 23b and 23c at both ends, is inserted and fitted into the bearing holder pipe 20. By tightening the tightening bolts 22, the large diameter parts 20a, 20
The flanges 23b and 23c supported by a are connected to the large diameter portion 20.
The bearing holder pipe 20 is firmly held in the bearing holder pipe 20.

The flange 2 on one side of the bearing holder 23
3b is integrally formed with the main body of the bearing holder 23, and the other flange 23c is formed separately from the main body of the bearing holder 23. This separate flange 23
A slit 23d is formed in the radial direction c, and the flange 23c is formed by inserting the bearing holder 23 into the bearing holder pipe 20 from one side and then inserting the bearing holder 23 from the other side so that the outer periphery of the end portion of the bearing holder 23 on the insertion side. And is fixed by tightening the slit 23d portion with a bolt 24. Incidentally, this separate flange 23
The c may be attached to the bearing holder 23 by serration fitting.

The rear axle 14 is inserted into the eccentric hole 23a of the bearing holder 23, and the rear axle 14 is fitted with the left and right bearings 25, 2 as shown in FIG.
5 is rotatably supported.

A caliper stay 26 is rotatably attached near the disc rotor 19 on one side of the bearing holder 23, and a caliper 27 for braking the rotation of the disc rotor 19 is fixedly mounted on the caliper stay 26.

Although the above embodiment describes a three-wheeled motor vehicle, the present invention can of course be applied to other vehicles having a swing arm.

[Effect of device]

As described above, according to the present invention, the pipe member is fixed to the rear end of the swing arm which is pivotally attached to the vehicle body frame at the front end so as to be vertically swingable, and the flange is provided at both ends and the eccentric hole is provided in the pipe member. The bearing holder is formed by inserting and supporting both flanges on the inner surface of both ends of the pipe material, the rear axle is rotatably inserted and supported in the eccentric hole, and the pipe material supports both flanges. It is formed by the large diameter part on both sides and the small diameter part in the middle between the large diameter parts on both sides.
One flange is formed separately from the bearing holder, and when the bearing holder was assembled, the separate flange was fitted and fixed to one end of the bearing holder.Therefore, when inserting the bearing holder into the pipe material, The bearing holder can be assembled by inserting it from the side not formed, and then fitting and fixing the flange inserted from the other side after insertion, thus making it possible to dent the central part of the pipe material and reduce the diameter. The weight of the swing arm can be reduced.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention. FIG. 1 is an overall side view of a motorcycle, FIG. 2 is an overall plan view of the same, and FIG. 3 is a partial sectional plan view of a swing arm portion. Is shown in FIG.
IV-IV sectional drawing, FIG. 5 is VV sectional drawing of FIG. 12 ... Swing arm, 20 ... Bearing holder pipe, 20a ... Large diameter part, 20c ... Central small diameter part, 23 ... Bearing holder, 23a ... Eccentric hole, 23b ... Flange, 2
3c ... Separate flange, 23d ... Slit, 24 ... Bolt

Claims (1)

[Scope of utility model registration request] 1. A pipe member is fixedly attached to a rear end of a swing arm whose front end is pivotally attached to a vehicle body frame so as to be vertically swingable.
A bearing holder having flanges at both ends and eccentric holes formed therein is inserted and fitted in the pipe material to support both flanges on the inner surfaces of both ends of the pipe material, and a rear axle is provided in the eccentric hole. In a mounting structure of a bearing holder for a rear axle of a vehicle which is rotatably inserted and supported, the pipe member is formed by a large diameter portion on both sides supporting the both flanges and a small central portion between both large diameter portions, One of the two flanges of the bearing holder is formed separately from the bearing holder, and when the bearing holder is assembled, the separate flange is fitted and fixed to one end of the bearing holder. Mounting structure of the bearing holder for the rear axle of the vehicle.