Elastic sheet type overrunning clutch

Abstract

The invention discloses an elastic sheet type overrunning clutch which comprises an external ring, an internal ring and rollers, wherein supporting pillar components of a retainer correspond to the rollers one to one along the axial direction; a slot is formed on each supporting pillar component; each reed is provided with an embedded part which is embedded into the slot; and each reed extends out of the corresponding slot and is used for applying a pre-tightening force to the corresponding roller along a meshed direction of a meshed slot. According to the invention, the process of directly processing a limiting base on the external ring is avoided; the processing process is simplified; the working efficiency is increased; the processing cost is lowered; the processing and assembling precision are ensured; different from a structure of centralized fixing points in the prior art, the overrunning clutch is free from a spot welding fixing structure; the effect of changing a metallographic structure is avoided; the stress concentration caused by the meshing of the overrunning clutch and the elastic deformation of separating reed is eliminated; the reeds have better moving freedom; the running life of the reeds is prolonged; the elastic deformation with pre-tightening force of the reeds reaches 5 million; and the use cost and the maintaining cost are greatly reduced.

Description

technical field [0001] The invention relates to a clutch device for motor vehicles and mechanical transmission, in particular to an overrunning clutch. Background technique [0002] The overrunning clutch is a basic component that appears with the development of power products. It is an important component used for power transmission and separation between the prime mover and the working machine or between the driving shaft and the driven shaft inside the machine. It is mainly a device with a self-clutching function by utilizing the speed change of the main and driven parts or the transformation of the rotation direction. In practice, most of them are clutches that use the meshing of teeth, the meshing of ratchets and pawls, or the wedging action of rollers and wedges to transmit motion or torque in one direction. [0003] Roller overrunning clutch is widely used in higher speed occasions because of its uniform and stable transmission, large load capacity and easy manufactu...

AI Technical Summary

Problems solved by technology

The limit seat of the overrunning clutch is generally formed in one piece on the outer ring or the inner ring, and the processing process is relatively complicated, which not only reduces the work efficiency, but also makes the processing cost higher

Therefore, in order to facilitate processing and ensure processing accuracy, the inner star wheel type is widely used, but for the structure of the outer ring as an active transmission, it is not conducive to adapt to the transmission law of the overrunning clutch, resulting in shortened service life or affecting the transmission effect; at the same time, Due to the strong integrity, if the parts are damaged, the overrunning clutch will be scrapped as a whole, and the cost of use will be wasted.

[0004] As for the overrunning clutch of the outer planetary wheel, since the limit seat is processed on the inner circle of the outer star wheel, the engaging body (roller) is limited by the space position of the body, and the number of installations is small, which reduces the carrying capacity of the overrunning clutch; more materials are used, The machining allowance is large, so the cutting edge of the tool is increased and the length is increased. At the same time, the power and volume of the machine tool are required to be large, resulting in low processing efficiency; the installation is complicated and the cost is high; for applications that require heavy loads, only increase its radial direction The size of the transmission equipment is relatively large, which cannot meet the needs of modern mechanical equipment

Another thing is that the elastic element acts on the roller and restricts its reverse engagement in the circumferential direction. It acts on a point or part of the roller, which cannot achieve balance, making the roller easy to deflect, resulting in jamming or poor movement. , resulting in mechanical failure

[0005] In order to solve the above problems, a cage structure other than the outer ring is adopted, and the reeds distributed along the axial direction of the support column are used to apply pretightening force to the rollers, which simplifies the processing and installation process and increases the bearing capacity of the overrunning clutch; but the reeds It is fixed on the supporting column, and the spot welding structure is often used for cutting, which changes the internal metallographic structure, which is prone to stress concentration, and the elastic deformation is relatively severe. short service life

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