JP7174369B2 - Bicycle drive and transmission system - Google Patents

Description

In driving a bicycle, the present invention uses a movable pulley to obtain propulsion force with a small force, and enables it with physical movements similar to walking of the human body.

In the conventional chain drive type, the force applied by a person to step on the pedal in the circular motion is within the range from the upper fulcrum to the lower fulcrum, and the directional force is applied slightly forward from above. be. There is a disadvantage that the above-mentioned range is connected by rowing alternately, and the direction that is difficult to apply force, which is slightly forward, is used.

Pulling force is halved for each movable pulley.

According to the above, the propulsive force due to the circular motion of the pedal cannot effectively utilize the force of stepping on the pedal.

The present invention is able to provide a driving device that can effectively utilize the stepping force by using the movable pulley theory.

In the present invention, another point is that the direction in which the stepping force is used is not up and down, but front and back with respect to the direction of travel, so that it is closer to walking of the human body. And it is possible to provide something closer to it by drawing a gentle arc.

The pedal shortens the crank, and the body side fulcrum A of the crank moves back and forth along the guide B. A fulcrum (1) and a fixed point (2) that work in the same manner as a fixed pulley are provided at the front end C of the guide B, and a movable pulley (3) moves on B. A and (1), (2), and (3) are connected by a belt such as a chain. As A moves from C to D on B, (3) moves from E to F.

In the application of the movable pulley theory, by increasing the number of movable pulleys, the force to step on the pedal for C→D is halved. By adding the movable pulley (4) and the fixed pulley fulcrum (5), it is possible to halve from the same [0008]. Similarly, the present invention includes increasing the number of movable pulleys in various forms.

As one of the various forms of 0009, (2) is removed from 0008 and a fixed pulley (6) and a movable pulley (7) are added.

The above device is implemented with both the left and right pedals.

The reciprocating motion of (3) is converted to the rotational motion of the rear wheels by another device.

Perspective view explaining 0008 Perspective view explaining 0009 Perspective view explaining 00010

FIG. 1 shows a basic drive system according to the invention.
Pass the belt through ▲1 and ▲3 from A, and fix it to ▲2. (3) is connected to the rear wheel drive.

2 and 3 show a driving device with an increased number of movable pulleys. In FIG. 2, (4) and (5) are increased, and (3) and (4) are connected. From the connection point, connect to the rear wheel drive system. In FIG. 3, (2) is eliminated, (6) and (7) are increased, and (1) and (6), (3) and (7) are connected. (3) is connected to the rear wheel drive.

A Pedal crank body side fulcrum B Pedal crank movement guide C Pedal crank movement starting point D Pedal crank movement turning point E Rear wheel drive direct drive pulley movement starting point F Rear wheel drive direct drive pulley turning point ▲１▼ Pedal crank connecting belt First fixed pulley (2) Belt fixing point (3) Rear wheel drive direct drive pulley (4) Movable pulley (5) connected with (3) Second fixed pulley (6) Connected with (1) Movable pulley connected with fixed pulley ▲７▼ ▲３▼

Claims (2)

On a bicycle, the left and right pedals are alternately pedaled in a reciprocating motion back and forth in the direction of travel of the bicycle, and a belt such as a chain connected to the motion passes through a device that uses a movable pulley to apply to the pedals. The resistance is reduced, and the torque is transmitted to the rear wheels by a transmission device at the tip of the belt. It is about "methods for obtaining propulsion for a bicycle" in that it utilizes the theory of movable pulleys.
As for the movable pulleys, this system utilizes the feature that the pedaling force is reduced by 1/2 as the number of movable pulleys is increased. It is completely different from the propulsion transmission method of the existing bicycle, in which the chain wheel is rotated by pedaling in a circle, and the sprocket is rotated by the chain to rotate the rear wheel.
This movable pulley is used for physical movement similar to walking of the human body. Front and rear with respect to the direction. By making the pedals reciprocate back and forth, the driving system of the pedals can be brought closer to the movement of the feet when a person runs. As a result , the movement of the foot during walking and running is closer to the original movement of the human body due to its structure, and the burden on the human body is reduced. This is about a "bicycle drive method" in which the pedals are reciprocated back and forth in order to approximate the movement of the human body during walking and running.
In the direction that utilizes the force of stepping on the pedals in physical movements similar to walking and running of the human body, the guides for the movement of the pedals are linearly reciprocated instead of up and down, so that they move forward and backward with respect to the direction of travel. Therefore, the legs are alternately moved back and forth in the same way as when walking and running, and the movement of the legs during walking and running is similar to the original movement of the human body due to the structure of the human body.

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