Lever variable-speed bicycle

Abstract

The utility model discloses a lever variable-speed bicycle, and relates to a bicycle. A lever circle point of the lever bicycle is arranged on a lever shaft; ;two levers (1) are both fixed to the two ends of the lever shaft (4), a steel rope is arranged on a safety buckle in a sleeved mode through a slide way wheel, the slide way wheel is fixedly connected to an inclined frame behind a saddle (7), the safety buckle is fixedly connected to the levers (1), three gear shifters are fixed to semicircular channel steel at the tail end of the frame, and three gearboxes are connected to the lever shaft (4) in series a clamping sheet is fixed on a brace, and the brace is fixed on the slideway wheel; a gear shifting key (11) is connected with the gear shifters and the slideway wheel, and the clamping piece is clamped on a gear; a batten is fixedly connected to the fixed disc; and a batten reserved through hole is fixed to a screw rod (32), the screw rod is fixed to the tail end of a frame, and only one clamping piece can be clamped, but two or three clamping pieces cannot be clamped at the same time. According to the lever bicycle, the maximum gear change ratio is more than 20 times and is far beyond the chain change ratio, the space of the transmission and a wheel through shaft is reduced, the structure is simplified, gear shifting of the transmission is convenient, and climbing and acceleration are more facilitated.

Description

technical field [0001] The invention relates to a bicycle, in particular to a lever-shift bicycle. Background technique [0002] Bicycle is a means of transportation driven by physical energy. With the development of society, bicycles have also undergone considerable development and changes, but they still cannot meet the rapid development of today's era and are gradually replaced by electric bicycles. [0003] Chain bikes have four major flaws: [0004] 1. Insufficient power and limited crank length affect the bike dynamics. The power of the chain bicycle is insufficient, and the power comes from the length of the crank of 170mm~175mm, which limits the maximum torque generated by the bicycle, thus affecting the speed of the bicycle. [0005] 2. The utilization rate of the chain bike is 50%, and the rotation of the crank changes the torque min from 0% to max 100%, which affects the long-distance driving of the bike. [0006] 3. The transmission ratio of the chain bicyc...

AI Technical Summary

Problems solved by technology

[0004] 1. Insufficient power, limited crank length, affects bike dynamics

The power of the chain bicycle is insufficient. The power comes from the length of the crank of 170mm~175mm, which limits the maximum torque generated by the bicycle and thus affects the speed of the bicycle.

[0005] 2. The utilization rate of the chain bike is 50%, and the rotation of the crank changes the torque min from 0% to max 100%, which affects the long-distance driving of the bike

[0006] 3. The transmission ratio of chain bicycles is small, the maximum transmission ratio is about 4 times, and there is no room to double the transmission ratio

[0007] 4. The chain is easy to drop or break, and maintenance is inconvenient

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