Planetary overrunning clutch

Abstract

The invention provides a planetary overrunning clutch comprising an outer ring, an inner ring, a planet gear, a partial gear, a stop pin, a spring and the like. When the planetary overrunning clutch is in a synchronous state, the outer ring and the inner ring synchronously rotate, and torque is transmitted between the outer ring and the inner ring by squeezing of the stop pin and the partial gear and meshing of the partial gear. Compared with the roller overrunning clutch transmitting torque by friction and the wedge overrunning clutch, the planetary overrunning clutch is capable of transmitting higher torque. When the planetary overrunning clutch is in an overrunning state, the planet gear disengages from the partial gear, and the surface of the planet gear and the surface of the partial gear relatively slide and only need to overcome tension of the spring during sliding; thus, gear contact pressure is low, frictional loss is slight, and the service life of the clutch is long. The planetary overrunning clutch is simple in structure, has few parts and is easy to manufacture and low in cost. Compared with the traditional overrunning clutch, the planetary overrunning clutch has the advantages of high drive torque, long service life and low manufacturing cost.

Description

technical field [0001] The invention relates to the field of mechanical transmission, in particular to an overrunning clutch. Background technique [0002] Overrunning clutches are widely used in mechanical engineering. They are mainly used in internal combustion engine starters, pulsating continuously variable transmissions, twin-turbine power shift transmissions for engineering vehicles, transmission systems of hybrid electric vehicles, and those that require dual power drives or In the case of two-speed drive. [0003] At present, there are two types of overrunning clutches widely used: roller overrunning clutches and sprag overrunning clutches. Due to the transmission mechanism, it is difficult for these two types of overrunning clutches to meet the increasingly high requirements of modern industry for mechanical products. [0004] The roller type overrunning clutch is composed of inner ring, outer ring, roller and other main components. When the inner ring and outer r...

AI Technical Summary

Problems solved by technology

However, the wedge type overrunning clutch still relies on friction to transmit the torque between the inner and outer rings, and has not fundamentally solved the problems of large contact stress and small transmission torque.

After the sprag type overrunning clutch wears out, the automatic compensation ability is poor

In the case of overload, one or several wedges may rotate beyond the maximum support line range, causing the inner and outer rings to be stuck, and the wedges cannot be reset when the torque is reduced.

[0006] Due to the constraints of the transmission mechanism, it is difficult for the roller type overrunning clutch and the sprag type overrunning clutch to meet the needs of the modern machinery industry

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