Friction torque limiting device with adjustable torque

Abstract

The invention discloses a friction torque limiting device with adjustable torque. The friction torque limiting device comprises a casing, wherein the casing is in a cylindrical cavity shape, the casing is assembled on a spline sleeve through a bearing located in a cavity, more than two pin rolls are evenly distributed in the circumferential direction of the casing, outer friction pieces are sleeved on pin rolls, the spline sleeve is connected with more than one circular inner friction pieces through a spline of the spline sleeve, inner friction pieces and outer friction pieces are arranged alternately to form a friction assembly, one bottom face of the friction assembly is closely attached to a stopping plate on the spline sleeve, the other bottom face of the friction assembly is closely attached to a pressing plate on the spline sleeve, and a locking nut on the spline sleeve is used for pressing against a pre-tightening assembly to adjust the tightness of the friction assembly. According to the friction torque limiting device, different friction and spring combinations can be selected to transmit different working torque according to the range of transmitted torque, if the transmitted torque is reduced after a period of time of working, the pre-tightening assembly can be adjusted to compensate errors of the transmitted torque of the device, and simultaneously, the friction torque limiting device is compact in structure, high in transmission power, wide in application range, high in reliability and long in life.

Description

technical field [0001] The invention belongs to the technical field of equipment overload protection in industries such as metallurgy, mining, and coal mines, and relates to a friction distance limiter, in particular to a friction distance limiter with adjustable torque. Background technique [0002] There are many reducers and chain overload protection equipment for traditional coal mine underground conveyors, including hydraulic couplings, elastic couplings, fluid-viscous clutches, fixed spring friction distance limiters, etc. However, the hydraulic coupling has a short service life and low transmission power; the elastic coupling has poor protection ability, low transmission power and inconvenient maintenance; the fluid-viscous clutch takes up a large space, is expensive and complicated to maintain; the fixed spring friction distance limiter transmits torque Unadjustable, poor product versatility, inconvenient maintenance and other problems. Contents of the invention ...

AI Technical Summary

Problems solved by technology

However, the hydraulic coupling has a short service life and low transmission power; the elastic coupling has poor protection ability, low transmission power and inconvenient maintenance; the fluid-viscous clutch takes up a large space, is expensive and complicated to maintain; the fixed spring friction distance limiter transmits torque Unadjustable, poor product versatility, inconvenient maintenance, etc.

Images