JPH01247291A - Bicycle with friction wheel for power transmission - Google Patents

Abstract

PURPOSE:To eliminate use of a chain and thereby facilitate repair of puncture and replacement of tube, etc., by rotating a friction wheel with pedals, and transmitting the power to the rear wheel tire through friction wheel. CONSTITUTION:Power is transmitted to a crank shaft (a) connected with pedals, and a friction wheel 7 is rotated upon speed reduction with gears 1-6. The friction wheel 7 and gear 6 idle to each other with the aid of ratchet during reverse rotation. The friction wheel 7 is formed in V shape and put in contact the sides of the rear wheel 8, which is thus put into frictional rotation. Provision of unevenness on a V-grooved rim of the friction wheel 7 ensures friction. This constitution allows elimination of using a transmitting chain, which enables easy replacement of rear wheel 8, tube, etc.

Description

DETAILED DESCRIPTION OF THE INVENTION Conventional bicycles use chains to transmit power, but the present invention makes the bicycle even more nimble and makes it easier to repair punctures and replace tubes.

This invention will be explained based on the drawings. In FIG. 1, when power is input to the crankshaft a through the pedals,
The speed is changed by gears 1 to 6, and the gear 6 and the rear wheel 7 rotate, and power is transmitted to the rear tire 8 by friction.The gears 2.3 and 4.5 are connected to each other, and the center It can rotate freely about the axis.

The gear 6 and the friction wheel 7 can rotate freely relative to the shaft, but the free gear and ratchet are connected so that power can be transmitted in the case of forward rotation and free rotation can be achieved in the case of reverse rotation. It is a four-wheeled sword. In Figs. 2 and 3, the friction wheel 7 is of IM construction, as in the case of the belt wheel (1), which eliminates contact with the bottom surface of the tire and makes contact with both sides.

Note that power transmission can be ensured by creating unevenness on the rim and shaping the friction wheel so that it meshes with the unevenness.

Further, as an example, FIG. 4 shows a rear wheel axle portion in which the frictional force can be easily adjusted.

When the rear wheel axle C is lightly loaded, the position is l, and the position is v when a person is riding.
When the J weight is large, it moves to the position in front of m and stops with thumbscrew 9. The thumbscrew 9 keeps the frictional force constant and allows easy adjustment.

This invention does not use a chain and simplifies the hanger section with a plastic cover etc. to express lightness, and it is also possible to easily replace a worn rear wheel with a surface width that is less worn. It is also easy to disassemble and store.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a bicycle equipped with this device, and Fig. 2 is a front view during friction. Figure 3 is a side view during friction. Figure 4 shows the rear wheel axle stopper with a freezing force adjustment screw Figure 2 Figure 3

Claims (2)

[Claims] (1) A bicycle that uses a friction wheel as a transmission device that transmits power by friction to a part of the tire or rim on the outer circumference of the bicycle rear wheel and rotates it. (2) A bicycle using the transmission device according to claim 1, which has a concave-convex mesh to increase friction.