JPH0134562Y2 - - Google Patents

Description

[Detailed explanation of the idea] a Industrial application field The present invention relates to an improvement in a wheel mounting structure.

B. Prior Art In three- and four-wheeled vehicles, such as straddle-type four-wheeled vehicles, which are used to travel on rough terrain, the wheels are mounted in a way that allows them to be easily attached and detached. Various mounting structures have already been proposed, but a typical example is a U-shaped cam body B attached to the end of the axle 1, as shown in Utility Model Application Publication No. 51-57403. It is known that the wheel is rotatably mounted and the cam body B is rotated while contacting a specially shaped abutment plate C to fix the wheel to the axle 1.

c Problems to be solved by the invention However, according to the above structure, since the wheel is attached and detached by passing the cam body B into the boss part A, the cam body B
There was a problem in that the distance from the support shaft 7 to the cam action surface was restricted by the inner diameter of the boss A, making it difficult to firmly press the boss A against the axle 1. Furthermore, since the interval between the forked portions 6 of the cam body B is also restricted by the inner diameter of the boss portion A, the compressive force of the cam body B concentrates on the center portion of the contact plate C during tightening, causing distortion. It also had the disadvantage of causing

d.Means for solving the problems This invention was made in view of the above problems.
The purpose is to provide an axle mounting structure that can solve the above problems by providing a locking tool separately from the axle.
The gist is that in a wheel mounting structure in which a hub provided at the center of the wheel is fitted onto the axle in such a way that it cannot rotate, and the hub is engaged and fixed to the outer end of the axle, the hub A locking groove is provided at the end of the axle protruding from the axle, and a washer is inserted into the axle to abut against the hub, while a shaft portion, a pair of cam portions connected by the shaft portion, and both A locking device consisting of a substantially U-shaped handle extending from the cam portion is provided, and the shaft portion of the locking device is removably engaged with the locking groove. Insert the shaft part of the stopper into the locking groove, rotate the stopper while bringing the cam part into contact with the washer, and as the cam rotates, the cam part moves the hub to the level of the axle. The wheel mounting structure is characterized in that it is mounted by pressing on the wheel.

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

FIG. 1 is a longitudinal sectional view showing an embodiment of the present invention;
FIGS. 2 and 3 are enlarged views of the main parts thereof, and FIG. 4 is a perspective view showing the locking tool.

In the figure, 11 is an axle, 12 is a rim, and 13 is a hub fixed to the center of the rim 12. Axle 1
1 includes an insertion part 10 provided at the end thereof and a locking groove 16 cut diagonally toward the axis,
A serration is formed on the outer peripheral surface of the insertion portion 10, and a step portion 23 is provided protruding from the base of the portion 10.

On the other hand, a serration is formed on the inner peripheral surface of the hub 13 corresponding to the serration, and the hub 13 is fitted into the axle 11 by fitting into the serration of the insertion portion 10.

Reference numeral 14 denotes a locking tool for press-contacting the hub 13 to the stepped portion 23 of the axle 11, which includes a shaft portion 20, a pair of cam portions 19 connected to both ends thereof, and these cam portions
9 and a U-shaped handle portion 21 extending therefrom. 15 is a cap, and 22 is a washer.

The procedure for attaching wheels to the axle 11 will be described below with reference to FIGS. 2 and 3.

First, the hub 13 is fitted into the insertion portion 10 of the axle 11, the washer 22 is passed through the axle 11, and the shaft portion 20 of the locking tool 14 is fitted into the locking groove 16 of the axle 11. Next, grasp the handle part 21 and lock the locking tool 14.
is rotated in the direction of the arrow in the figure while the cam portion 19 is brought into contact with the washer 22. At this time, the cam portion 19 changes its circumferential surface from the short diameter portion 17 to the long diameter portion 18.
The hub 13 is rotated toward the washer 22 while being in contact with the washer 22 , and the hub 13 is pressed against the stepped portion 23 of the axle 11 .

In addition, when removing a wheel, the above-mentioned procedure may be reversed.

e Function The locking tool 14 of the present invention is made separately from the axle 11, and after the hub 13 is inserted into the axle 11,
The shaft portion 20 of the locking tool 14 is engaged with the locking groove 16 of the axle 11 and rotated to perform tightening work. At this time, the locking tool of the present invention can increase the distance d between the shaft portion 20 and the cam surface regardless of the inner diameter of the hub 13, so that the locking tool can be firmly tightened.

f. Effect of the invention The present invention is configured such that a locking tool is provided separately from the axle and is attached to the axle to lock the wheel. Since the maximum length between the shaft part of the locking tool and the cam surface can be made larger than that of the conventional locking tool, the wheel can be firmly attached to the axle with light work of the locking tool. .

Further, since the distance between the two cam parts 19, 19 can be made large without being restricted by the inner diameter of the hub, even if the thickness of the washer 22 is made thin, there will be no distortion in the washer 22. Another advantage is that the hub 13 can be firmly attached to the axle 11.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal section showing an embodiment of the axle mounting structure according to the present invention, and Figs. 2 and 3 are enlarged views of the main parts of Fig. 1 to explain the wheel mounting procedure. , FIG. 4 is a perspective view showing the locking tool. 11...Axle, 12...Rim, 13...Hub,
14... Locking tool, 16... Locking groove, 17... Minor diameter part of cam part, 18... Long diameter part of cam part, 19...
Cam part, 20... Shaft part, 21... Handle part, 22...
...Watsiya.

Claims (1)

[Scope of utility model registration request] The hub 13 provided in the center of the wheel is connected to the axle 11
The axle 11 is fitted in such a way that it cannot rotate.
In the wheel mounting structure in which a hub 13 is engaged and fixed to the outer end of the hub 13, a locking groove 16 is provided at the end of the axle 11 protruding from the hub 13, and a washer 22 is inserted into the axle 11 to attach the hub. 13, on the other hand, a shaft portion 20, a pair of cam portions 19 connected by the shaft portion 20, and a substantially U-shaped handle portion 21 extending between the two cam portions 19. A stopper 14 is provided, and the shaft portion 20 of the locking tool 14 is removably engaged with the locking groove 16. When installing the wheel, the shaft portion 20 of the locking tool 14 is inserted into the locking groove 16. The locking tool 14 is rotated while the cam portion 19 is brought into contact with the washer 22, and as the cam 19 rotates, the cam portion 19 locks the hub 13 into the axle 11.
A wheel mounting structure characterized in that the wheel is mounted by pressing onto the stepped portion 23 of the wheel.