Overrun clutch

Abstract

The invention discloses an overrun clutch. A lower friction block, an internal friction block, an upper friction block, a compression spring, a gland and a single-direction overrun clutch all are arranged inside a bidirectional overrun clutch shell; an output end of a bidirectional overrun clutch and the single-direction overrun clutch are coaxially arranged in sequence; the internal friction block sleeves the periphery of the single-direction overrun clutch; the upper friction block and the lower friction block sequentially sleeve the periphery of the internal friction block; the periphery ofthe internal friction block is provided with a ring of ring-shaped bump; the upper and lower friction blocks are separately distributed at the upside and downside of the ring-shaped bump of the internal friction block; the upper and lower friction blocks form gaps with the outer circumferential surface of the internal friction block; the overrun clutch also comprises the gland which is arranged above the upper friction block and below a retaining ring of the bidirectional overrun clutch shell; the compression spring is arranged between the gland and the upper friction block; and the single-direction clutch and the bidirectional overrun clutch are arranged in a spaced manner. The overrun clutch disclosed by the invention has the advantages of being simple in structure and convenient, safeand reliable in use.

Description

technical field [0001] The invention relates to a clutch, in particular to an overrunning clutch. Background technique [0002] When there is a load torque in the transmission mechanism, when the transmission stops or the motor is de-energized, reverse rotation may occur. In order to prevent reverse rotation, an overrunning clutch or a drive motor that cannot be reversed can be used, and an irreversible transmission (such as a self-locking worm drive or a sliding screw drive) and an electromagnetic or hydraulic brake can also be used. [0003] Overrunning clutches have been widely used as a commonly used anti-reverse device. The one-way overrunning clutch can prevent one-way reverse rotation, but when it is applied to two-way rotation, such as for ball screw transmission in vertical orientation, it is necessary to increase the friction mechanism to generate resistance torque to offset the reverse torque. When the reverse torque has an impact or vibration load, the resistan...

AI Technical Summary

Problems solved by technology

However, this design will make the transmission mechanism need to increase a large torque to overcome the resistance torque when the reverse torque is small, resulting in increased power consumption, increased structural size and other defects

When the two-way overrunning clutch has a reverse torque, the roller or wedge block will not be able to open normally, resulting in intermittent action

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