INCORPORATION BY REFERENCE

The present application claims priority under 35 U.S.C. § 119 to Japanese Patent Application No. 2019-154425 filed on Aug. 27, 2019. The content of the application is incorporated herein by reference in its entirety.

TECHNICAL FIELD

The present invention relates to a saddle riding vehicle.

BACKGROUND ART

A known saddle riding vehicle includes a swing arm provided with a chain receiving piece that receives a chain that has fallen off a sprocket (see, for example, Patent Document 1). In the configuration disclosed in Patent Document 1, the chain receiving piece extends toward an inside in a vehicle width direction from the swing arm such that the chain receiving piece is flush with an upper surface of the swing arm.

PRIOR ART DOCUMENT

Patent Document

[Patent Document 1]Japanese Patent Application Laid-open No. 2013-147219

SUMMARY OF THE INVENTION

Problem to be Solved by the Invention

A need exists for the saddle riding vehicle to receive effectively the chain that has fallen off with a simple structure.

The present invention has been made in view of the foregoing situation and it is an object of the present invention to enable, in a saddle riding vehicle, a chain that has fallen off to be effectively received by a simple structure.

Means for Solving the Problem

To achieve the foregoing object, an aspect of the present invention provides a saddle riding vehicle that includes: a swing arm (13) that supports a rear wheel (3); a sprocket (31) disposed at the rear wheel (3); and a chain (32) that meshes with the sprocket (31) to thereby drive the rear wheel (3). In the saddle riding vehicle, the rear wheel (3) includes a rear wheel-side protruding portion (58) that protrudes from the sprocket (31) to an outside in a vehicle width direction, a chain cover fastening portion (40), to which a chain cover (33) for covering the chain (32) is fastened, is disposed on the outside in the vehicle width direction with respect to the rear wheel-side protruding portion (58) and protrudes to an inside in the vehicle width direction, and the chain cover fastening portion (40) is disposed at a position at which the chain cover fastening portion (40) overlaps the rear wheel-side protruding portion (58) in a vehicle side view.

In the foregoing configuration, preferably, a gap (G) between the chain cover fastening portion (40) and the rear wheel-side protruding portion (58) in the vehicle width direction is smaller than a width (W) of the chain (32) under a condition in which the chain cover fastening portion (40) overlaps the rear wheel-side protruding portion (58).

In the foregoing configuration, preferably, the chain cover fastening portion (40) is disposed superior to an upper surface (37) of the swing arm (13).

In the foregoing configuration, preferably, the chain cover fastening portion (40) extends to the inside in the vehicle width direction from a superiorly extended portion (39) that extends superiorly from the upper surface (37) of the swing arm (13).

In the foregoing configuration, preferably, the chain cover (33) is fastened to an outer side surface (40a) on the outside in the vehicle width direction of the chain cover fastening portion (40).

In the foregoing configuration, preferably, an end portion (40b) on the inside in the vehicle width direction of the chain cover fastening portion (40) is disposed on the inside in the vehicle width direction with respect to a side surface portion (43) that is a portion inside, in the vehicle width direction, of a portion disposed inferior to and posterior to the end portion (40b) in the swing arm (13).

In the foregoing configuration, preferably, the rear wheel-side protruding portion (58) serves as a fastening part (55) that fastens the sprocket (31) to the rear wheel (3).

In the foregoing configuration, preferably, the chain cover fastening portion (40) is formed integrally with the swing arm (13).

Effects of the Invention

The saddle riding vehicle includes: the swing arm that supports the rear wheel; the sprocket disposed at the rear wheel; and the chain that meshes with the sprocket to thereby drive the rear wheel. In the saddle riding vehicle, the rear wheel includes the rear wheel-side protruding portion that protrudes from the sprocket to the outside in the vehicle width direction, the chain cover fastening portion, to which the chain cover for covering the chain is fastened, is disposed on the outside in the vehicle width direction with respect to the rear wheel-side protruding portion and protrudes to the inside in the vehicle width direction, and the chain cover fastening portion is disposed at the position at which the chain cover fastening portion overlaps the rear wheel-side protruding portion in a vehicle side view.

Through the foregoing configuration, the gap between the chain cover fastening portion and the rear wheel-side protruding portion is narrow, so that the chain can be received by the chain cover fastening portion and the rear wheel-side protruding portion. Thus, a fallen off chain can be effectively received by a simple structure. The use of the chain cover fastening portion for receiving the chain promotes reduction in weight and in the number of parts used.

In the foregoing configuration, the gap between the chain cover fastening portion and the rear wheel-side protruding portion in the vehicle width direction may be smaller than the width of the chain under a condition in which the chain cover fastening portion overlaps the rear wheel-side protruding portion.

Through the foregoing configuration, the chain is unable to pass through a gap between the chain cover fastening portion and the rear wheel-side protruding portion, so that the chain can be effectively received.

In the foregoing configuration, the chain cover fastening portion may be disposed superior to the upper surface of the swing arm.

Through the foregoing configuration, the chain cover fastening portion can receive the chain at a position superior to the upper surface of the swing arm, so that the chain can be effectively prevented from contacting the swing arm. Additionally, the chain cover can be built small vertically.

In the foregoing configuration, the chain cover fastening portion may extend to the inside in the vehicle width direction from the superiorly extended portion that extends superiorly from the upper surface of the swing arm.

Through the foregoing configuration, the chain cover fastening portion can have a long length in the vehicle width direction and the chain cover fastening portion and the superiorly extended portion can generally be built small.

In the foregoing configuration, the chain cover may be fastened to the outer side surface on the outside in the vehicle width direction of the chain cover fastening portion.

Through the foregoing configuration, a fallen off chain can be prevented from contacting the chain cover and the chain cover can be readily fastened to the chain cover fastening portion from the outside in the vehicle width direction.

In the foregoing configuration, the end portion on the inside in the vehicle width direction of the chain cover fastening portion may be disposed on the inside in the vehicle width direction with respect to the side surface portion that is a portion inside, in the vehicle width direction, of the portion disposed inferior to and posterior to the end portion in the swing arm.

Through the foregoing configuration, because the gap between the chain cover fastening portion and the rear wheel-side protruding portion is narrow, so that a fallen off chain can be received effectively.

In the foregoing configuration, the rear wheel-side protruding portion may serve as the fastening part that fastens the sprocket to the rear wheel.

Through the foregoing configuration, the chain can be received by a simple structure using the fastening part that fastens the sprocket to the rear wheel.

In the foregoing configuration, the chain cover fastening portion may be formed integrally with the swing arm.

Through the foregoing configuration, the chain cover fastening portion can be easily provided.

