Friction-type roller overrunning clutch

Abstract

The invention discloses a friction-type roller overrunning clutch comprising a cylindrical inner ring, a ring-shaped outer ring, rollers, a retainer and an offsetting spring, wherein the outer ring and the inner ring are coaxially sleeved; the retainer is arranged between the inner ring and the outer ring; the rollers are embedded into grids of the retainer; the inner surface of the outer ring is provided with a wedge-shape cavity playing a clutch role; the wedge-shape cavity comprises grooves consistent with the axial direction of the outer ring; the grooves are uniformly arranged at intervals along the periphery of the inner surface of the outer ring; the number of the grooves is consistent with the number of the rollers embedded into the retainer; the outer surface of the inner ring is a cylindrical smooth surface; the rollers are positioned between the outer surface of the inner ring and the grooves of the wedge-shape cavity of the outer ring; and the locking or the relative rotation between the inner ring and the outer ring is realized under the pushing action of the offsetting spring. The invention realizes that the processing of the outer surfaces of the inner ring and the outer ring is completed through a single-section processing process by arranging the wedge-shape cavity of the overrunning clutch on the inner surface of the outer ring of the overrunning clutch and arranging the outer surface of the inner ring to be the smooth surface, thereby enhancing the work efficiency and reducing the material consumption at the same time.

Description

technical field [0001] The invention relates to an overrunning clutch, in particular to a friction type roller overrunning clutch. Background technique [0002] The friction type roller overrunning clutch used in the current prior art includes inner and outer rings, rollers, cages and return springs, wherein the inner ring and the outer ring are coaxially fitted, and the inner ring is used as a star wheel and a rotating shaft , the outer surface is provided with a wedge-shaped cavity for clutching. The wedge-shaped cavity is composed of grooves along the axial direction of the inner ring. The grooves are uniformly arranged along the outer surface of the inner ring in a certain number; The cage, the cage is a squirrel-cage cylindrical structure, the circular frames at both ends are equally spaced around the circumference, and the connecting strips are arranged in the axial direction. The connecting strips divide the outer surface of the cage into a uniform grid, and the grid ...

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Problems solved by technology

[0002] The friction type roller overrunning clutch used in the current prior art includes inner and outer rings, rollers, cages and return springs, wherein the inner ring and the outer ring are coaxially fitted, and the inner ring is used as a star wheel and a rotating shaft , the outer surface is provided with a wedge-shaped cavity for clutching. The wedge-shaped cavity is composed of grooves along the axial direction of the inner ring. The grooves are uniformly arranged along the outer surface of the inner ring in a certain number; The cage, the cage is a squirrel-cage cylindrical structure, the circular frames at both ends are equally spaced around the circumference, and the connecting strips are arranged in the axial direction. The connecting strips divide the outer surface of the cage into a uniform grid, and the grid is embedded Rollers with suitable size and consistent axial direction, the number of rollers is consistent with the number of grooves in the wedge-shaped cavity; at the same time, the outer surface of the inner ring is also provided with a smooth surface for mounting bearings, and the smooth surface is usually located in the wedge-shaped On both sides of the cavity; both ends of the inner ring are also equipped with axial splines or pin holes that enable the inner ring to achieve linkage with external equipment; the disadvantage of this structure is that the groove surface of the wedge-shaped cavity is set on the outer surface of the inner ring, It needs to be coplanar with the smooth surface of the connecting bearing, and it must be processed in sections during processing. The working hours are long, the cost is high, and the yield is low. Moreover, the raw material used for processing is large. Once there is a waste product in the processing process, there will be a big problem. loss

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