JPS593027Y2 - Rear wheel drive device for motorcycles - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a rear wheel drive device for a two-wheeled motor vehicle that allows engine running and human power running.

Conventionally, this type of device includes, for example, a cantilever type rear axle b driven by the power unit a, and a rear wheel C on the axle b, mounted on the side of the power unit a at the rear of the vehicle body, as shown in the first diagram. It is equipped with a ceno d for human power drive on the outside.
A type is known that is equipped with a sprocket e that engages with the sprocket e, and an engine exhaust pipe f, such as a muffler, on the outside thereof. Generally, the sprocket e is attached by spline engagement or other means, and when attaching or detaching the rear wheel C in a car, it is necessary not only to temporarily remove the sprocket e, but also to attach the sprocket e to the exhaust pipe f on the outside. Since this also becomes a hindrance, it is also necessary to remove it once, which brings with it the inconvenience of making the work troublesome.

The purpose of the present invention is to obtain a device that does not have such inconveniences, and a cantilever type rear axle 3 driven by the power unit 2 is attached to the side of the power unit 2 at the rear of the vehicle body 1.
and a rear wheel 4 on the axle 3, and a sprocket 6 that engages with a human-powered chino 5 on the outside thereof;
In a type having an exhaust pipe 8 of the engine 7 on the outside thereof, the rear axle 3 is configured to have a length approximately equal to the width of the bub 4a of the rear wheel 4, and the sprocket 6 is attached to the outer surface of the bub 4a. It is detachably attached using screws 9 and other means.

FIGS. 2 and 3 show an example of this, in which a nut 11 is attached to the outer end of the axle 3 through a washer 10 to prevent the bub 4a from being pulled out. The sprocket 6 extends forward and is engaged with a drive sprocket 14 on a pedal shaft 13 driven by a pedal 12 in front of it, and the sprocket 6 has a freewheel 1 therein.
5 is now available.

The gap between the outermost end of the axle 3 and the exhaust pipe 8 is
The width is approximately the same as the width of the bubble 4a.

The sprocket 6 is superimposed and bonded to the side surface of the bub 4a via a cylindrical wheel guide 16 extending laterally from the center of the sprocket. It is conceivable to provide an intermediate recess 17, so that when the sprocket 6 hits an external obstacle, the guide 16 is first damaged in that part 17, thus preventing the gloss axle and the like from being damaged. It can be protected from.

To explain its operation, in order to remove the rear wheel 4, it is sufficient to remove the sprocket 6 on the side thereof.In other words, from this state, if the nut 11 and washer 10 are removed next, the rear wheel 4 can be removed from the axle. 3 and can be taken out to the outside from within the gap between it and the exhaust pipe 8 on the outside, and its attachment can then take place also through the gap.

In this way, according to the present invention, when attaching and detaching the rear wheel 4, it is sufficient to once remove the sprocket 6 on the side thereof, compared to the conventional exhaust pipe 8 that requires the removal once. It has the effect of making work simple and easy.

[Brief explanation of drawings]

Figure 1 is a partially cutaway plan view of an example of a conventional device;
The figure is a side view of one example of the present device, FIG. 3 is a partially cutaway plan view, and FIG. 4 is a cutaway plan view of a partially modified example. 1...Vehicle body, 2...Power unit, 3
...Rear axle, 4...Rear wheel, 5.
...Cheno, 6...Sprocket, 7.
...Engine, 8...Exhaust pipe, 4a...
...Bub, 9...Screw.

Claims (1)

[Scope of utility model registration request] The power unit 2 is mounted on the side of the power unit 2 at the rear of the vehicle body 1.
It is equipped with a cantilevered rear axle 3 driven by a cantilever type rear axle 3, a rear wheel 4 on the axle 3, a sprocket 6 on the outside that engages with a human-powered chenno 5, and an exhaust pipe 8 of the engine 7 on the outside. In this type, the extending portion of the rear axle 3 is configured to have a length approximately equal to the width of the bub 4a of the rear wheel 4, and the sprocket 6 is attached to and detached from the outer surface of the bub 4a with a screw 9 or other means. A rear wheel drive device for a motorcycle that can be freely installed.