JPS591904Y2 - Motorcycle chain adjuster device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a chenoa adjuster device for a motorcycle.

More specifically, an end piece with a long hole formed in the Chenoa adjustment direction is held between flat U-shaped adjustment members, and the threaded part of the adjustment screw provided at the rear end of the adjustment member is inserted into the long hole from the rear end of the end piece. The adjustment member is screwed in the adjustment direction so that a part thereof faces, and the axle end related to the chino is fitted into the part of the adjustment member facing the elongated hole of the end piece so as to cross the member and the elongated hole.
This invention relates to a chenoa adjuster device for motorcycles that is compact and facilitates axle attachment and detachment work.

FIG. 8 schematically shows the motorcycle 1, which includes a front fork 4 supporting a front wheel 3 in front of a frame 2.
However, a steering handlebar 5 is disposed above this, a fuel tank 6 is disposed on the front part of the frame 2, and a power unit 7 such as an engine and a transmission case is disposed below this.

A passenger seat 8 is provided at the rear of the tank 6, and a rear wheel 10 is provided at the rear of the frame via a carrier fork 9.
A rear cushion unit 11 is disposed between the rear fork 9 and the rear part of the frame.

The power unit 7 and the rear wheel 10 are connected by a chain wheel 12 and a sprocket 13, and the rear wheel 10 is driven.

In such a chain-driven motorcycle, a chain wheel adjuster device is used to adjust the center-to-center correction based on the extension of the chain wheel 12.

Conventionally, this type of adjuster device is as shown in FIGS. 5 to 8.

That is, the first one is as shown in FIGS. 4 and 5, in which an elongated hole 31 is formed in the front and rear direction in an end piece 30 extending at the rear end of the rear fork. A flat U-shaped adjustment member 32 is fitted into the rear part of the piece 30 so as to sandwich it, and the hole 3 provided in the adjustment member 32 is inserted into the rear part of the piece 30.
Pass the axle of the rear wheel through hole 33 and elongated hole 31.
traverse.

An adjustment nut 34 is fixed to the rear end piece 32a of the adjustment member 32, an adjustment bolt 35 is screwed into this, the tip of the bolt 35 is brought into contact with the end piece 30, the bolt 35 is screwed, and the elongated hole 31 is turned. The adjustment member 32 is moved forward and backward within the stroke, and the axle is moved back and forth to adjust the extension of the ceno.

The above adjuster device connects the bolt 35 to the end piece 3.
Since the adjustment member 32 is in contact with the rear end of the rear wheel, the length of its rearward protrusion becomes large, and if the axle is pulled out to remove the rear wheel due to a puncture or other reason, the adjustment member 32 will fall off from the end piece 30 and the rear wheel will be damaged. When assembling, the work of assembling the adjusting member 32, aligning the axle and the elongated hole 33, etc. is troublesome, which is not desirable in terms of maintenance.

On the other hand, in the types shown in FIGS. 6 and 7, the rear end portion of the end piece 40 is bent to form a support portion 40a, and the end piece 40 is provided with a long hole 41 and an adjustment portion is provided in the support portion 40a. A nut 44 is provided.

On the other hand, an adjustment part 42 having an axle hole 43 is provided in the front part of the adjustment bolt 45, and the bolt part 45a of the adjustment bolt 45 is passed through the hole in the support part 40H, and the nut 44
Adjustment is performed by screwing the adjustment screw 45 and the adjustment section 42 forward and backward.

Although such an adjuster device can prevent the adjusting part from falling off when the axle is removed, the adjusting part is supported by bending the end piece 40, so if the axle becomes loose, the driving force will not be applied to the adjusting poles 1 to 45. It works and is undesirable in terms of strength.

The inventor of the present invention has devised the present invention in view of the above-mentioned problems in the Chenoa adjuster device of a motorcycle, and to solve the problems.

The purpose of this invention is to make the device more compact, and
To provide an adjuster device for a motorcycle, which has the advantages of holding an adjusting member in its original position when removing a wheel, simplifying and smoothing the insertion of an axle when subsequently installing the wheel, and improving maintainability.

Next, a preferred embodiment of the present invention will be described in detail according to the attachment surface.

This reveals further objects and advantages of the present invention.

Fig. 1 is a cutaway side view of the main parts of the Cheno adjuster device according to the present invention, Fig. 2 is a view taken in two directions as seen from the arrow in Fig. FIG.

At the rear end of the rear fork 9 of the motorcycle 1 shown in FIG. 8, an end piece 14 is provided to protrude and extend rearward in the length direction.

Specifically, a bifurcated portion 9a is formed at the rear end of the bridger fork 14, and the front portion 14a of the end piece 14 is inserted into the bifurcated portion 9a.
Integrated by welding.

An elongated hole 15 which is long in the longitudinal direction, that is, in the front-rear direction, is bored in the middle or rear part of the end piece 14 so as to pass through it in the width direction.

Left and right pieces 16a, 16a of a planar U-shaped adjustment member 16 are disposed at the middle or rear part of the end piece 14 so as to sandwich this part of the piece 14.

The rear end piece 16b connecting the left and right pieces 16a, 16a of the adjustment member 16 is spaced a predetermined distance from the rear end of the heath 14, and a support hole 16C is provided in the rear end piece 16b, and an adjustment A cylindrical flange portion 17b provided at the base of the head 17a of the bolt 17 is rotatably fitted, and a groove flange portion 17C is attached to the base of the flange portion 17b.
This is brought into contact with the inner peripheral wall of the hole 16C of the rear end piece 16b, and a snap ring 17e is secured between the head 17a and the outer surface of the rear end piece 16b.

Then, screw the threaded portion 17 d of the adjustment bolt 17 into the threaded hole 14 b that is bored in the front-rear direction between the rear end of the end piece 14 and the rear of the elongated hole 15 .
The tip faces into the elongated hole 15.

Axle insertion holes 16d and 16d are concentrically provided in the left and right pieces 16a and 16H of the adjustment member 16, and a guide collar 20 is laterally press-fitted between the holes 16d and 16a so as to cross the elongated hole 15. The end of the axle 1B is fitted into the collar 20.

The end surface 18a of the axle 18 faces the outer surface of the outer left and right pieces 16-1 of the adjustment member 16, and a bolt 21 having a head 21a larger in diameter than the hole 16d is inserted into the washer 22.
The axle shaft 18 is fixed to the adjustment member by screwing from the axial end face 18a through the axle.

The collar 20 has a stop flange 20a on the inner end surface in the axial direction.
It regulates the axial direction and receives the end of the collar 19 fitted around the axle 18.

In the following length, by rotating the adjustment bolt 17 through the head 17a, the end piece 14 is set to the fixed side by threading the threaded portion 17d and the screw hole 14b, and the adjustment member 16 moves forward and backward, and the adjustment member 16 is moved back and forth. An axle 18 horizontally suspended by the member 16 moves forward and backward guided by the long hole 15 to adjust the extension of the ceno.

By the way, when the axle 1B is attached or detached due to a rear wheel puncture or other reasons, the adjustment bolt 17 still connects the adjustment member 16 and the end piece 14 even if the axle 18 is removed, so the adjustment member 16 may hang downward or It does not fall off, and especially in this embodiment, since the collar 20 is attached, it has a fixed structure, and when reassembling the axle 18, it can be easily, smoothly, and reliably inserted into the adjustment member and the end piece. Can be done.

Even when the collar 20 is not attached, the adjusting member 16 remains fixed to the end piece 14, and the axle can be inserted and assembled easily, smoothly, and reliably, and with the collar, the workability is further improved. .

Further, since the adjustment bolt 17 is screwed into the machined piece 14 in the front-rear direction, the length in the front-rear direction is shortened, making it possible to achieve compactness.

As is clear from the above, according to the present invention, the adjusting member does not fall off or move when the axle is attached or detached, making the wheel attaching and detaching work easier, smoother, and more reliable, improving maintainability, and improving the adjuster device. In addition to being more compact, the adjustment bolts are provided in the front and back direction and engage with the end piece, so in the unlikely event that an accident such as the axle comes loose, driving force will be applied to the adjustment bolt. However, it has significant practical effects such as being sufficiently advantageous in terms of strength.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, in which Fig. 1 is a cutaway side view of essential parts of the adjustment device, Fig. 2 is a view taken in two directions as seen from the arrow in Fig. 1, and Fig. 3 is a view in Fig. 1, 3-3. 4 is a side view showing an example of a conventional adjuster device, FIG. 5 is a plan view of the same, FIG. 6 is a side view of another similar example, and FIG. 7 is a plan view of the same. , FIG. 8 is a side view of the motorcycle. In the drawings, 14 is an end piece, 15 is a long hole, 16 is an adjustment member, 17 is an adjustment screw, and 18 is an axle.

Claims (1)

[Scope of utility model registration request] An end piece with a long hole formed in the adjustment direction of the chino is held between a flat U-shaped adjustment member, and a part of it is inserted into the long hole from the rear end of the end piece by inserting the threaded part of the adjustment screw provided at the rear end of the adjustment member. The end piece of the adjustment member is screwed together in the adjustment direction as shown in the figure, and the end piece of the adjustment member facing the elongated hole is fitted with the end of the axle that is associated with the chino and crosses the member and the elongated hole. Chenoa adjuster device for motorcycles.