Coil Spring Overrunning Clutch

Abstract

The present invention proposes a volute spring type overrunning clutch, which includes a body and rollers. A roller profile groove is arranged on the inner peripheral wall of the body, and rollers are placed in the roller profile grooves. Between the rollers A roll-type volute spring is provided, and the volute spring is installed on a bead frame fixed to the body; the bead frame includes a ring-shaped first side cover and a second side cover, and the first and second side covers are respectively set There are opposite outer claws and inner claws, the outer claws are close to the outer peripheral edge of the side cover, the inner claws are close to the inner peripheral edge of the side cover, the outer claws and inner claws on the same side of the roller are located on the same radial line of the body, The outer claw is interference-fitted in the slot of the inner peripheral wall of the body, and the inner claw is installed and limited by the coil spring. The invention does not need to be provided with a cover case and a baffle plate, saves installation space, has high clutch strength, and ensures the effective working stroke of the rollers while arranging more rollers, has strong bearing capacity and good processing technology.

Description

technical field [0001] The invention relates to a clutch, in particular to a coil spring type overrunning clutch. Background technique [0002] The overrunning clutch is an important part to realize the power transmission and separation between the driving shaft and the driven shaft. It is a device with self-clutching function using the speed change of the main and driven parts or the transformation of the rotation direction. The existing overrunning clutch includes a connected casing and a main body, the end face of the casing is located on one side of the main body, the main body is annular, and the inner peripheral wall of the main body is provided with grooves for placing rollers and compression springs. Many and evenly distributed, because the bottom wall, front wall and rear wall of the existing groove are processed on the body, the shape is more complex, so that the structure of the broach used for the groove on the broaching body is also more complicated. The machi...

AI Technical Summary

Problems solved by technology

But this kind of clutch, because the torsion spring is supported on the thinner and longer volute spring mounting column that is integrally bent and formed with the casing, when the load of the clutch is further increased, the lack of stability of the mounting column will cause the volute The deflection of the spring makes the roller unable to move according to the predetermined track, the roller cannot fully reach the design stroke, and the working stroke of the roller is reduced, resulting in a decrease in the load capacity of the clutch

In addition, the two sides of the main body are respectively a case and a baffle which are substantially the same in diameter as the outer periphery of the main body. The case includes an end plate and a peripheral part. The two sides of the body are basically covered, which is not conducive to the heat dissipation of the body and the lubrication of the rollers. It also increases the overall size of the clutch. In the limited layout space, the size of the clutch body can only be reduced, which affects the strength and service life of the clutch body.

Later, a kind of roller bracket overrunning clutch with small diameter and no shielding of the body appeared without a cover and a baffle. However, the fixing method of the roller bracket and the body is complicated, the processing technology is poor, and the manufacturing cost is high. Low production efficiency

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