Composite overrunning clutch

Abstract

The invention discloses a composite overrunning clutch. The composite overrunning clutch comprises a main overrunning clutch device and an auxiliary overrunning clutch device, a ratchet wheel and a pawl are adopted as a main clutch device transmission pair, the multi-pawl is used for improving the load capacity and reducing the circumferential size of the ratchet teeth, other types of overrunningclutch devices are adopted as auxiliary materials, meanwhile, a travel switching and amplifying mechanism, an engagement guide inclined plane, a pilot pawl, an avoiding clearance and the buffer mechanism are matched and used, the abrasion is reduced, the service life is prolonged, the collision is eliminated, the impact are reduced, the sensitivity are controlled, the transmission precision and the meshing direction angle are limited, and the application range are also improved.

Description

technical field [0001] The invention provides an overrunning clutch. Background technique [0002] At present, there are mainly two types of overrunning clutches: friction type and meshing type. The friction type generally uses balls, cylinders, and wedges as locking elements, which have the disadvantages of easy wear, short life, and small load bearing. The meshing type mainly includes the ratchet type, which adopts surface contact rigid transmission to withstand large loads. The structure of the single pawl type is simple, the combination and separation are very simple, and the reliability is also high. It can be said that the advantages are very significant. The back pressure surface of the middle pawl needs to keep in contact with the ratchet teeth. Frequent impacts not only produce loud noises, but also increase energy consumption and reduce service life. The application is greatly restricted and is only suitable for low-speed occasions. In addition, single pawl When ...

AI Technical Summary

Problems solved by technology

The friction type generally uses balls, cylinders, and wedges as locking elements, which have the disadvantages of easy wear, short life, and small load bearing

The meshing type mainly includes the ratchet type, which adopts surface contact rigid transmission to withstand large loads. The structure of the single pawl type is simple, the combination and separation are very simple, and the reliability is also high. It can be said that the advantages are very significant. The back pressure surface of the middle pawl needs to keep in contact with the ratchet teeth. Frequent impacts not only produce loud noises, but also increase energy consumption and reduce service life. The application is greatly restricted and is only suitable for low-speed occasions. In addition, single pawl When the axial size of the type is limited, the circumferential size of the ratchet must be increased to increase the load capacity, which increases the idle angle and engagement impact, while the multi-pawl type can greatly improve the load capacity, but the noise , transmission impact, and the meshing conflict caused by the manufacturing accuracy and the asynchronous action of the pawl is still unavoidable, and it cannot have both large load capacity and high reliability.

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