双杠杆撬拔传动机构

By using a double-lever prying transmission mechanism, the design achieves two-stage force amplification and improved riding comfort of the rickshaw, overcoming the limitations of the traditional rickshaw's labor-saving effect and comfort, and is suitable for various vehicle types.

CN224511371UActive Publication Date: 2026-07-17CHONGQING JIAOTONG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
CHONGQING JIAOTONG UNIV
Filing Date
2025-07-15
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

The existing transmission structure of rickshaws has limitations in terms of labor-saving effect and riding comfort, especially in terms of gear ratio limits and ergonomics, which are difficult to improve further.

Method used

It adopts a dual-lever prying transmission mechanism, which achieves two-stage force amplification through the lever arm ratio design of lever A and lever B. Combined with ergonomic design, it alternately drives the pedal downwards, reducing muscle fatigue and the risk of knee injury.

Benefits of technology

It achieves significant labor-saving effects and good riding comfort, and is suitable for two-wheeled bicycles and tricycles, thus expanding its applicability.

✦ Generated by Eureka AI based on patent content.

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Abstract

双杠杆撬拔传动机构，应用于人力车传动结构，包括基板、曲柄、杠杆A、摇杆A、杠杆B和摇杆B。曲柄前端通过转轴安装在基板上，后端与杠杆A铰接；杠杆A通过铰接点A与摇杆A连接，后端与杠杆B铰接；杠杆B通过铰接点B与摇杆B连接，后端为自由端。当曲柄转动时，杠杆A和B绕铰接点摆动，杠杆B自由端上下运动驱动转轴旋转。通过设置第一阻力臂与动力臂比1:2、第二阻力臂与动力臂比1:4，实现两级杠杆省力效果，总省力比达1:8。本机构可替代传统链传动，显著提升省力效果，同时通过交替踩踏保持骑行舒适性，适用于自行车、三轮车等。
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Claims

1. Double lever pry drive mechanism characterized in that: Including substrate Crank, lever A, rocker A, lever B, and rocker B; The front end of the crank is rotatably mounted on the base plate via a rotating shaft, and the rear end of the crank is hinged to the front end of lever A; lever A has a hinge point A between its front and rear ends, and the rear end of lever A is hinged to the front end of lever B; the front end of rocker A is hinged to the base plate, and the rear end of rocker A is hinged to hinge point A of lever A; lever B has a hinge point B between its front and rear ends, and the rear end of lever B is a free end; the front end of rocker B is hinged to the base plate, and the rear end of rocker B is hinged to hinge point B of lever B. As the crank rotates in a circle, lever A swings up and down around hinge point A, and lever B swings up and down around hinge point B.

2. The double lever prying drive mechanism of claim 1 wherein: When the free end of lever B moves from the top of the swing stroke to the bottom and then back to the top, the crank rotates 360°.

3. The double lever prying drive mechanism of claim 2, wherein: The segment of lever A between its front end and hinge point A is defined as the first resistance arm; the segment of lever A between its rear end and hinge point A is defined as the first effort arm; the segment of lever B between its front end and hinge point B is defined as the second resistance arm; the segment of lever B between its rear end and hinge point B is defined as the second effort arm; the length ratio of the first resistance arm to the first effort arm is 1:x, where x ranges from 1.5 to 2.5; the length ratio of the second resistance arm to the second effort arm is 1:y, where y ranges from 2 to 10.

4. The double lever prying drive mechanism of claim 3, wherein: The value of x is 2, and the value of y is 4.