JPS6345423Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a fender stay mounting structure for a front fork that has an excellent dustproof effect and allows easy attachment and detachment of wheels.

The so-called front fork, which suspends the front wheel of a motorcycle and acts as a buffer, usually has a pair of front forks 1 sandwiching the wheel 2 between them, and the lower end of the bottom case 3 of the front fork 1, as shown in FIG. A fork pipe 5 supported on the axle 4 of the wheel 2 and sliding inside the bottom case 3 is supported on the vehicle body side by an upper bracket 7 and an under bracket 8, and a handle 6 is fixed to the upper bracket 7. 9 is fixed to the upper part of the bottom case 3 by a fender stay 10. Therefore, when removing the wheel 2, when a normal front fork is used, the wheel 2 can be easily removed by separating the bottom case 3 and the axle 4.
When the front fork 1 has an attached mechanism such as an anti-nose dive mechanism, it is difficult to remove it because the front fork's brackets, accessories, wheel brake devices, etc. touch each other.

Therefore, in such a case, as shown in FIGS. 2 and 3, the fender stay 10 is made into a slotted type and an O-ring is inserted into the fitting groove 11 provided on the outer periphery of the upper opening end of the bottom case 3. 12, and when removing the wheel 2, it is separated from the axle 4,
With the fender stay 10 fixed to the fender 9, only the bottom case 3 is rotated to a position where the bracket etc. do not get in the way, and then the wheel 2 is removed.

However, with such a fender stay mounting mechanism, it is extremely time-consuming to install the fender stay 10, and dust may enter the contact surface between the fender stay 10 and the bottom case 3, especially between the fitting groove 11. A situation has occurred where the bottom case 3 becomes difficult to rotate and eventually stops rotating.

As a result of repeated efforts to create a fender stay mounting structure that is easy to assemble and has an excellent dustproof effect, the inventors made the fender stay cylindrical and provided a convex portion corresponding to this convex portion on the bottom case. The present invention was developed based on the recognition that the object could be achieved by providing a flange portion with a notch for the fender stay, and engaging the stopper ring and then the seal ring on the inner surface of the fender stay.

Next, one embodiment of the device of the present invention will be described based on the attached drawings. Figure 4 shows an embodiment of the device of the present invention including a fender stay, a stopper ring and an O.
- Figure 5 is a side view of the main part showing the ring in cross section.
FIG. 6 is a perspective view showing an embodiment of the bottom case of the device of the present invention, and FIG. 6 is a perspective view showing an embodiment of the fender stay.

Reference numeral 30 denotes a bottom case, which has a flange portion 31 protruding from its open end at appropriate intervals and a plurality of notches 32. The width of the fender stay 100 and the length of the convex portion 103 are approximately A stopper ring locking groove 33 is provided at a distance equal to the distance from the surface of the flange portion 31, and a seal ring locking groove 34 is provided adjacent to the stopper ring locking groove 33 on the open end side. Note that a seal ring locking groove 34' is also provided on the flange portion 31 side.
Reference numeral 100 denotes a fender stay, which has an integral cylindrical shape, has a protruding flange 102 with a hole 101 for fender attachment, and has a width and number corresponding to the notch 32 of the bottom case 30 on the lower end surface. A protruding portion 103 is provided. Further, on the opposite side of the convex portion 103, a step 104 is provided on the inner peripheral surface so that the convex portion 103
A guide portion 105 having a length substantially equal to the length of is provided in a protruding manner. 110 is a stopper ring such as a square ring or a circlip, which is attached to the bottom case 30.
It is fitted into the stopper ring locking groove 33 of the stopper ring. 1
20 is a seal ring such as an O-ring, and the seal ring retaining groove 34 of the bottom case 30 is
is fitted into the

In addition, the seal ring locking grooves 34, 34' and the seal rings 120, 120' fitted in these grooves
In the illustrated embodiment, is provided on the outer circumferential surface of the bottom case 30, but it may be provided on the inner circumferential surface of the fender stay 100, or it may be provided on both the outer circumferential surface and the inner circumferential surface if the mounting positions match. may be provided.
Furthermore, as illustrated in FIG. 7, the bottom case 30
By providing the notch 32 and the convex portion 103 of the fender stay 100, the rotation angle of the bottom case 30 can be adjusted.
It can be made up to 90°.

Since the device of the present invention is configured as described above,
A seal ring 120' such as an O-ring is fitted into the seal ring locking groove 34', and the fender stay 100 is fitted into the bottom case 30.
The convex portion 103 is fitted into the notch 32, and the stopper ring 110 is fitted into the stopper ring locking groove 33.
and then the seal ring 120 is fitted into the seal ring locking groove 34, and then the fender stay 100 is pulled out from the notch 32 where the convex part 103 is fitted to the open end side of the bottom case 30. Move the stepped portion 104 to stopper ring 11
0, and then rotated to a predetermined fender mounting position to bring the tip end surface of the convex portion 103 into contact with the flange portion 31 surface. Therefore, the fender stay 100 is prevented from slipping out, dust is prevented from entering between the contact surfaces of the fender stay 100 and the bottom case 30, and the bottom case 30 rotates smoothly when the wheel is removed. Moreover, the fender can be easily attached.

In this invention, the fender stay is cylindrical, a convex part is provided, and a guide part is provided on the opposite side with a step on the inner peripheral surface and approximately the same length as the convex part, and the flange part of the bottom case corresponds to the convex part. A notch is provided so that the stopper ring comes into contact with the stepped part of the guide part, and the seal ring is fitted on the outside of the stopper ring, thereby preventing dust from entering between the contact surfaces between the fender stay and the bottom case. Great effects are recognized, such as being able to prevent intrusion, smooth rotation of the bottom case, and ease of assembly.

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram of the main parts showing the installation situation of the front fork, Fig. 2 is a plan view showing an example of a conventional fender stay, and Fig. 3 is a partial cross section showing an example of a conventional fender stay mounting structure. Enlarged view,
Fig. 4 is a side view of the essential parts of an embodiment of the device of the present invention showing a fender stay, stopper ring, and seal ring in cross section, and Fig. 5 is a perspective view showing an embodiment of the bottom case of the device of the present invention. , FIG. 6 is a perspective view showing one embodiment of the fender stay, and FIG. 7 is a plan view showing an example of the relationship between the notch of the bottom case of the present invention and the protrusion of the fender stay. 30...Bottom case, 31...Flange part, 32
...Notch, 33...Stopper ring locking groove, 34
... Seal ring locking groove, 100 ... Fender stay, 103 ... Convex portion, 104 ... Step portion, 105 ... Guide portion, 110 ... Stopper ring, 120 ... Seal ring.

Claims (1)

[Scope of utility model registration request] A bottom case 30 has a flange portion 31 with a plurality of notches 32 protruding from the opening side and a stopper ring locking groove 33, and a protrusion 103 corresponding to the notches 32 of the bottom case 30 is provided on the lower end surface. A guide portion 1 that protrudes and has a length substantially equal to the length of the convex portion 103 on the opposite side of the convex portion, and has a stepped portion 104 on the inner circumferential surface.
A cylindrical fender stay 100 having 05,
The step part 10 fits into the stopper ring locking groove 33.
4, the stopper ring 110 and the outer peripheral surface of the bottom case 30 or the fender stay 100
A fender stay mounting structure for a front fork, comprising a seal ring 120 fitted in a seal ring locking groove 34 provided on at least one of the inner peripheral surfaces of the front fork.