JP2510259Y2 - Autobuy chain buffer mounting structure - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a chain buffer mounting structure for a motorcycle.

[Conventional technology]

In a motorcycle, the engine sprocket and the rear sprocket are connected by a chain to drive them.
The rear wheel is attached to the rear end of the rear fork so that bumps on the road surface can be absorbed by the cushion. When the rear wheel cushions, the chain also vibrates and shakes, and there is the inconvenience of hitting the rear fork and producing a metallic noise. For this reason, a chain buffer made of an elastic material is attached to the front part of the rear fork with a screw so that the chain hits the chain buffer to prevent the metal noise from being generated and to prevent the chain from swinging. See, for example, Japanese Utility Model Publication No. 60-134089.

[Problems to be solved by the invention]

By the way, in a motorcycle, a lower chain cover that covers the chain passing under the rear fork from the outside may be fastened to the rear fork by screws. In that case,
In the chain buffer mounting structure shown in 60-134089, when replacing the chain buffer, the lower chain cover is first removed, then the chain buffer is loosened and the screws are removed from the rear fork, and then a new chain buffer is screwed to the rear fork. Stop, and then tighten the lower chain cover with screws. Therefore, it is necessary to attach / detach the chain buffer separately from the attachment / detachment of the lower chain cover, which is troublesome and time-consuming to replace the chain buffer.

Also, the chain buffer and lower chain cover
Since they are fastened by different screw members, there are problems such as a large number of parts.

The present invention has been made in view of the above conventional problems, and an object of the present invention is to provide a chain buffer mounting structure for a motorcycle in which the chain buffer can be easily replaced and the number of parts can be reduced.

[Means for solving problems]

The present invention has the following structure to achieve the above object.

That is, a rear fork (1) having a front end rotatably supported by a vehicle body (2) and holding a rear wheel (4) at a rear end, and an engine so as to surround the rear fork (1) in a vehicle side view. A chain (7) wound around a sprocket (5) and a rear wheel sprocket (6), and at least two front and rear screw members (14a), (14b) are fastened to the rear fork (1), and Chain (7) passing below the rear hawk (1)
In a motorcycle including a lower chain cover (9) that covers the outer side of the lower chain cover (9), a plate-shaped mounting piece (10) protruding from an inner surface of the lower chain cover (9) is provided on the rear fork (1) and the chain. (7) is inserted, a chain buffer (12) is attached to the lower surface of the attachment piece (10), and the rear end of the chain buffer (12) is folded back in a substantially U shape. Attach the folded-back portion (11) to the mounting piece (1
(0) is hooked at the rear end while the chain buffer (1
A chain buffer mounting structure for a motorcycle characterized in that the front end of (2) and the front end of the mounting piece (10) are fastened together with the rear fork (1) by the front screw member (14a).

[Action]

According to the present invention, in the chain buffer (12), the folded-back portion (11) of the rear end portion is hooked on the rear end portion of the mounting piece (10), while the front end portion thereof is the front end portion of the mounting piece (10). Since it is fastened to the rear fork (1) together with the front screw member (14a), if the screw members (14a) and (14b) are removed, the chain buffer (12) will be removed together with the lower chain cover (9). Can be removed at the same time. Moreover, with the screw member (14a) removed, the chain buffer (12) can be easily attached because the folded-back portion (11) at the rear end is simply hooked to the rear end of the mounting piece (10). It can also be removed from the piece (10). Also, in the new chain buffer (12), the folded-back portion (11) is hooked on the attachment piece (10), and the front end portion is screwed together with the lower chain cover (9) by the screw member (14a) to the rear fork (1). Just fasten it to.

Further, since the front screw member (14a) fastens the lower chain cover (9) and the chain buffer (12) together, the number of screw members can be reduced.

〔Example〕

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

The motorcycle according to this embodiment has a rear hawk 1 whose front end is rotatably supported by the vehicle body 2 and whose rear end holds the rear wheel 4.
And a chain 7 wound around the engine sprocket 5 and the rear wheel sprocket 6 so as to surround the rear fork 1 in a vehicle side view, and at least two screws (corresponding to screw members) at the front and rear.
A lower chain cover 9 that is fastened to the rear fork 1 by 14a and 14b and covers the chain 7 that passes below the rear fork 1 from the outside is provided.

In the chain buffer mounting structure of this embodiment, the plate-shaped mounting piece 10 protruding from the inner surface of the lower chain cover 9 is inserted between the rear fork 1 and the chain 7, and the chain is attached to the lower surface of the mounting piece 10. A buffer 12 is attached, the rear end of the chain buffer 12 is folded back in a substantially U shape, and the folded portion 11 is hooked on the rear end of the mounting piece 10.
On the other hand, the front end of the chain buffer 12 and the front end of the attachment piece 10 are fastened together with the rear fork 1 by the front screw 14a.

The configuration of each part will be described. A cushion unit 3 is connected between the rear part of the rear fork 1 and the upper rear part of the vehicle body 2. By expanding and contracting the cushion unit 3, the rear fork 1 swings so that the rear wheel 4 can be cushioned. Has become. A rear wheel 4 is rotatably mounted on the rear end of the rear fork 1. The chain 7 wound around the engine sprocket 5 and the rear wheel sprocket 6 and transmitting the driving force of the engine to the rear wheel 4 has a predetermined slack.

A pair of upper and lower upper chain covers 8 and the lower chain cover 9 are attached to the rear fork 1 so as to cover the outside of the chain 7.

The mounting piece 10 is welded to the upper front portion of the lower chain cover 9 so as to project inward. Chain buffer 12
Is a plate-shaped hard elastic body and is formed by molding. In the chain buffer 12, the folded-back portion 11 at the rear end is hooked on the rear end of the mounting piece 10 and is attached to the lower surface of the mounting piece 10.
Then, the chain buffer 12 and the attachment piece 10 are attached by fastening a screw 14a passing through a hole at each front end portion to a bracket 13 welded to the front end of the rear fork 1 using a nut 15. The rear portion of the lower chain cover 9 is fastened to the stay 16 protruding from the rear fork 1 by using the rear screw 14b.

According to the present embodiment having the above-described configuration, the chain 7 vibrates due to the slack in the cushion of the rear fork 1 and the change in the driving torque.
At the time of hitting 12, the generation of metallic noise is prevented and at the same time vibration is suppressed.

Further, in this embodiment, the chain buffer 12 can be removed together with the lower chain cover 9 by removing the screws 14a and 14b. Moreover, in this state, the chain buffer 12 can be easily removed from the mounting piece 10 because the folded-back portion 11 is simply hooked to the rear end of the mounting piece 10. Then, the new chain buffer 12 can also be assembled by hooking the folded-back portion 11 on the mounting piece 10 and fastening the front end together with the lower chain cover 9 to the nut 15 of the bracket 13 with the screw 14a. . Therefore, it is not necessary to remove the chain buffer after removing the lower chain cover as in the conventional case, and the chain buffer 12 can be easily replaced when it is worn.

Further, since the front screw 14a fastens the lower chain cover 9 and the chain buffer 12 together, the number of screw members is reduced and the number of parts can be reduced.

[Effect of device]

As described above, according to the present invention, it is not necessary to remove the chain buffer after removing the lower chain cover as in the conventional case, and the chain buffer (12) can be easily replaced when it is worn. You can Also,
It is also possible to reduce the number of parts.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention. FIG. 1 is an overall side view, FIG. 2 is an exploded perspective view of a front part of a lower chain cover, FIG. 3 is an enlarged side view of a main part, and FIG. It is a sectional view taken along the line AA of FIG. 1 ... rear hawk, 2 ... car body, 4 ... rear wheel, 5 ... engine sprocket, 6 ... rear wheel sprocket, 7 ... chain, 9 ... lower chain cover, 10 ... mounting piece, 11 ...
… Folded part, 12 …… Chain buffer, 13 …… Bracket, 14a …… Front side screw (screw member), 14b …… Rear side screw (screw member).

Claims (1)

(57) [Scope of utility model registration request] 1. A rear hawk (1) having a front end rotatably supported by a vehicle body (2) and holding a rear wheel (4) at a rear end, and a rear hawk (1) surrounding the rear hawk in a vehicle side view. As described above, the chain (7) is wound around the engine sprocket (5) and the rear wheel sprocket (6), and is fastened to the rear fork (1) by at least two front and rear screw members (14a) and (14b), Also, the chain (7) passing below the rear hawk (1).
In a motorcycle including a lower chain cover (9) that covers the outer side of the lower chain cover (9), a plate-shaped mounting piece (10) protruding from an inner surface of the lower chain cover (9) is provided on the rear fork (1) and the chain. (7) is inserted, a chain buffer (12) is attached to the lower surface of the attachment piece (10), and the rear end of the chain buffer (12) is folded back in a substantially U shape. Attach the folded-back portion (11) to the mounting piece (1
(0) is hooked at the rear end while the chain buffer (1
A chain buffer mounting structure for a motorcycle, characterized in that the front end of (2) and the front end of the mounting piece (10) are fastened together with the rear fork (1) with the front screw member (14a).