Two-gear speed change transmission device

Abstract

The invention discloses a two-gear speed change transmission device. The two-gear speed change transmission device comprises a speed change mechanism and wheels. The speed change mechanism comprises amain driving axle, a speed changer frame and a driven shaft. The two ends of the main driving axle are connected with hubs of the wheels correspondingly, an input gear, an output gear and a driving wheel are arranged on the main driving axle, and the input gear is arranged on the main driving axle in a sleeving mode and can conduct radial rotation and axial movement relative to the main driving axle; a first engagement part and a second engagement part are arranged on the input gear, a third engagement part matched with the first engagement part is arranged on the driving wheel, a fourth engagement part matched with the second engagement part is arranged on the main driving axle; and the output gear is fixedly connected with the main driving axle, a first driven wheel matched with the driving wheel and a second driven wheel matched with the output gear are arranged on the driven shaft, the first driven wheel and the second driven wheel are fixedly connected with the driven shaft, andtherefore power loss is reduced.

Description

【Technical field】 [0001] The invention relates to the technical field of bicycles, in particular to a two-speed transmission device. 【Background technique】 [0002] ginseng figure 1 as shown, figure 1 A two-speed transmission device in the prior art is disclosed, which includes: a transmission frame 1 ′, an input shaft 2 ′ and an output shaft 3 ′ installed in the transmission frame 1 ′, and the transmission frame 1 ′ is fixed to the vehicle frame connection or damping connection, two driving wheels 4` are installed on the input shaft 2` in the transmission frame 1`, and an input sprocket 6 fixedly connected to the input shaft 2` is installed between the two driving wheels 4` `, two driven wheels 5` are installed on the output shaft 3`, internal splines are respectively provided in the two driving wheels 4`, and external splines matched with the above-mentioned internal splines are provided on the input shaft 2`. The spline is used to move the input shaft 2` in the axial d...

AI Technical Summary

Problems solved by technology

[0002] ginseng figure 1 as shown, figure 1 A two-speed transmission device in the prior art is disclosed, which includes: a transmission frame 1 ′, an input shaft 2 ′ and an output shaft 3 ′ installed in the transmission frame 1 ′, and the transmission frame 1 ′ is fixed to the vehicle frame connection or damping connection, two driving wheels 4` are installed on the input shaft 2` in the transmission frame 1`, and an input sprocket 6 fixedly connected to the input shaft 2` is installed between the two driving wheels 4` `, two driven wheels 5` are installed on the output shaft 3`, internal splines are respectively provided in the two driving wheels 4`, and external splines matched with the above-mentioned internal splines are provided on the input shaft 2`. The spline is used to move the input shaft 2` in the axial direction to realize gear shifting, and the output shaft 3` of the transmission is connected to the wheel shaft through a differential and a connecting shaft. The defects of this kind of structure transmission are: 1. The frame is used as the reference for positioning, which makes the positioning and installation of the transmission more inconvenient, and position deviation is prone to occur during the installation process, which affects the transmission stability. 2. The output shaft of this type of transmission is connected to the wheel shaft through a differential and a connecting shaft. Make the whole transmission structure more complicated; 3, the power needs to reach the output shaft through the transmission of the transmission wheel when the high speed gear of this kind of transmission device, so there is power loss, and most of the time when the bicycle is in use, the high speed gear is used, which is relatively difficult. Low-speed gears are rarely used, so designing high-speed gears as gears with power loss will greatly increase the power loss of the transmission during bicycle riding

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