Reciprocating speed-up driving mechanism for bicycle

Abstract

The invention discloses a reciprocating speed-up driving mechanism for a bicycle. The reciprocating speed-up driving mechanism comprises two cranks, a wheel hub, a wheel hub shaft type support body, a reciprocating mechanism, a one-way driving mechanism, a movement speed-up mechanism and a movement output mechanism; the reciprocating mechanism, the one-way driving mechanism, the movement speed-up mechanism and the movement output mechanism are mounted in the wheel hub shaft type support body; the wheel hub is mounted on the wheel hub shaft type support body, and rolling friction exists between the wheel hub and the wheel hub shaft type support body; and the output end of the movement output mechanism is connected with the wheel hub through a gear. The reciprocating speed-up driving mechanism is characterized in that the two cranks are respectively fixedly connected with the shaft gear disk and central gear shaft of the reciprocating mechanism, the shaft gear disk and central gear shaft of the reciprocating mechanism are respectively connected with the one-way driving mechanism; and the one-way driving mechanism is mounted between the reciprocating mechanism and the movement speed-up mechanism, and the input end of the movement output mechanism is connected with the movement speed-up mechanism. The reciprocating speed-up driving mechanism for the bicycle is compact in structure, convenient in mechanism arrangement and high in transmission efficiency.

Description

technical field [0001] The invention relates to a driving and transmission mechanism of a bicycle, in particular to a reciprocating speed-increasing driving mechanism of a bicycle. Background technique [0002] Traditional bicycles transmit power and increase speed through sprockets and chains. The disadvantage is that the transmission parts are exposed, and maintenance work such as regular cleaning and oiling is required. Sometimes the chain will fall off, which is easy to dirty the rider's body Clothes, and the chain and the sprocket are exposed, it is not safe to use, and the structure of the entire transmission mechanism is not compact; at the same time, when the pedals of a traditional bicycle make a circular motion around the central axis, the moment arm between the pedals and the central axis Constantly changing, and there are upper and lower dead centers, and the ride is not efficient. [0003] Patent No. ZL85106710 is the driving mechanism of the rod-driven bicycle...

AI Technical Summary

Problems solved by technology

[0006] However, the structure of a bicycle reciprocating drive mechanism whose patent number is ZL200810035815.8 is too complicated, and the same multi-stage structure on the left and right can only complete repeated partial functions, and the slow and reverse motion of the left and right cranks is completed by speeding up and then decelerating. The structure and transmission efficiency are not high. In practical applications, under the constraints of the mechanism volume not being too large and the speedup meeting certain requirements, some speedup gears are not easy to meet the strength requirements and their hubs are short, so they lose their practical application value.

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