Mechanical Bicycle Automatic Transmission

Abstract

A mechanical bicycle automatic speed changer comprises an input end outer shell, an output end outer shell, an inner layer shell, a transmission mechanism and a variable speed adjusting device. The input end outer shell is internally provided with an input shaft. One end of the output end outer shell is in threaded connection with the input end outer shell, and the other end of the output end outer shell is in spline connection with an output shaft. The inner layer shell is arranged inside a shaft outer shell formed by the input end outer shell and the output end outer shell and contains the transmission mechanism and the variable speed adjusting device arranged on the outer side of the transmission mechanism in a sleeved mode. The transmission mechanism further comprises a first conical body, a second conical body, a transmission steel belt and a stable small shaft, wherein the transmission steel belt is arranged on the outer edge of the first conical body and the outer edge of the second conical body, and the stable small shaft is arranged on one side of the first conical body and one side of the second conical body. The variable speed adjusting device further comprises a first adjusting sleeve, a second adjusting sleeve, a thrusting spring and an adjusting pushing ring. The mechanical bicycle automatic speed changer cannot be damaged easily, the reliability is enhanced, the transmission ratio can be automatically adjusted, the riding strength is reduced, and the user using experience is enhanced.

Description

technical field [0001] The invention relates to the technical field of bicycles, in particular to a mechanical bicycle automatic transmission. Background technique [0002] Bicycles are widely used in real life and are a commonly used means of transportation. However, it has the disadvantage that it is difficult to change the speed according to the needs of the user. With the development of science and technology, the existing bicycles mostly adopt the following design to achieve speed change: install one or more center axle cranksets with unequal radii on the center axle, and also install in parallel at the flywheel of the rear axle. Two or more rear axle cranksets with different radii are connected by the chain between the central axle crankset and the rear axle crankset. The speed change of the conventional bicycle is realized by adjusting the shift mechanism of the chain on the different wheels of the central axle crankset and the rear axle crankset. Typically, a gear...

AI Technical Summary

Problems solved by technology

[0005] The present invention aims at providing a mechanical automatic bicycle transmission aimed at the defects of the conventional mechanical bicycle automatic transmission, such as short service life, high failure rate, and inconvenient maintenance.

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