Movable gear-shift multi-gear transmission device with pawls driven by two wheels

Abstract

The invention discloses a movable gear-shift multi-gear transmission device with pawls driven by two wheels. The movable gear-shift multi-gear transmission device comprises a center transmission shaft, a gear shift mechanism, multiple sets of planetary transmissions and a power input shaft. Each planetary transmission comprises a center wheel, a planetary frame, a planetary wheel and a gear ring. The planetary transmissions comprise the start planetary transmission, the tail end planetary transmission and at least one set of middle planetary transmission. The planetary frame of the start planetary transmission is integrated with or fixedly connected with the gear ring of the corresponding middle planetary transmission. The gear ring of the tail end planetary transmission is integrated with or fixedly connected with the planetary frame of the corresponding middle planetary transmission. The gear shift mechanism comprises ratchet wheels, a pawl piece frame and at least one pawl piece mounted on the pawl piece frame. The ratchet wheels are correspondingly arranged on the start planetary transmission, the middle planetary transmissions and the tail end planetary transmission. Therefore, the controllability and stability of gear shift are improved greatly.

Description

[0001] 【Technical field】 [0002] The invention relates to the technical field of bicycles, in particular to a two-wheel drive ratchet mobile shifting multi-speed transmission device. [0003] 【Background technique】 [0004] The gear shifting of two-wheeled bicycles in the prior art is generally realized by moving the pedals with the feet. The specific structure is to set the internal splines for gear shifting on the pedals, and then respectively set the gears on the main parts of the planetary transmission. The shifting outer splines matched with the shifting inner splines are used to move the pedals with the feet, so that the shifting inner splines on the pedals are respectively matched with the shifting outer splines on the main components of the planetary transmission to achieve shifting. There are the following defects in the gear shifting method of this spline engagement: 1. Due to the limitation of the structure, in order to make the pedaling parts move left and right to...

AI Technical Summary

Problems solved by technology

[0004] The gear shifting of two-wheeled bicycles in the prior art is generally realized by moving the pedals with the feet. The specific structure is to set the internal splines for gear shifting on the pedals, and then respectively set the gears on the main parts of the planetary transmission. The shifting outer splines matched with the shifting inner splines are used to move the pedals with the feet, so that the shifting inner splines on the pedals are respectively matched with the shifting outer splines on the main components of the planetary transmission to achieve shifting. There are the following defects in the gear shifting method of this spline engagement: 1. Due to the limitation of the structure, in order to make the pedaling parts move left and right to shift gears, a gap needs to be left in the middle of the pedaling parts, so the whole structure is not compact enough; 2. This kind of shifting method requires setting an overrunning clutch in the planetary transmission; 3. The difficulty of spline docking is relatively high, so both the shifting controllability and shifting stability are poor

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