Moment conversion device

Abstract

The invention discloses a moment conversion device, which comprises a moment input shaft, an external toothed arc, a toothed arc frame, an internal toothed arc, two overrunning clutches, and a moment output shaft, wherein one end of the toothed arc frame is fixed on the moment output shaft; the internal toothed arc is fixed on the other end of the toothed arc frame; the external toothed arc is fixed on the moment input shaft; the two overrunning clutches are fixed on the moment output shaft in the same direction; and one overrunning clutch is meshed with the external toothed arc, and the other overrunning clutch is meshed with the internal toothed arc. By the moment conversion device, a moment in the reciprocating direction is converted into a moment in the continuous direction; and the moment conversion device has a compact structure.

Description

technical field [0001] The invention relates to a torque conversion device, in particular to a bicycle torque conversion device. Background technique [0002] At present, bicycles have become the most widely used means of transportation in the world due to their advantages of economy, environmental protection and convenience, and technicians are constantly improving them. In the existing improvement plan, an important direction is to convert the gravity change caused by the rider's posture change or road bumps during riding into torque to provide power for the bicycle. But the change of gravity is reciprocating, so the direction of moment is also reciprocating. Under the existing technical conditions, devices such as ratchets are generally used, which can only act on the bicycle with a moment in one direction, and the moment in the other direction does not work, so that the bicycle can only be assisted intermittently. Moreover, as a device attached to the bicycle, the torq...

AI Technical Summary

Problems solved by technology

Under the existing technical conditions, devices such as ratchets are generally used, which can only act on the bicycle with torque in one direction, and the torque in the other direction does not work, so it can only provide power for the bicycle intermittently.

Moreover, as a device attached to the bicycle, the torque conversion device needs to be as compact and light as possible, otherwise its own weight will weaken or even cancel the boosting effect

[0003] In the patent CN 101683881B, a torque converter is disclosed, which can convert the torque in two directions into a continuous torque output in one direction, but during the torque conversion process of the device, both the inner and outer tooth arcs are fixed on the tooth arc On the frame, the reciprocating moment is only transmitted by one toothed arc frame, which is prone to fatigue fracture

In addition, in order to stabilize the torque transmission of the external tooth arc, there must be a large fixed area between the external tooth arc and the tooth arc frame, which makes the length of the tooth arc frame longer, which is not conducive to the realization of a compact structure

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