Safe retracting device of cable

Abstract

The invention discloses a safe retracting device of a cable. The safe retracting device comprises a driving device and a driving shaft, wherein the driving shaft is rotatably sleeved with a wind-up roller; an electric slip ring is arranged on one end of the wind-up roller; the electric slip ring is connected with a connection terminal which is connected with the cable on the wind-up roller; a carbon brush is arranged corresponding to the electric slip ring, connected with the external cable and fixedly mounted; a friction clutch is arranged between the driving shaft and the wind-up roller; when the cable is wound up, the driving device drives the driving shaft to rotate, and if the friction force of the friction clutch is larger than traction force and weight of the cable, the driving shaft drives the wind-up roller to turn through the friction clutch, in order to enable the wind-up roller to automatically wind up; when the cable is paid off, the wind-up roller is continuously located at the wind-up state, but the traction force and the weight of the cable are larger than the friction force of the friction clutch, and the wind-up roller is pulled by the traction force of the cable and located at the reverse turning state, thus the cable is passively paid off by the wind-up roller. In the working process, the safe retracting device keeps the cable at a certain tension, thereby preventing the cable from tying knot, twisting and being torn down. The safe retracting device is safe and convenient to use.

Description

technical field [0001] The invention relates to a device for retracting and unwinding cables. Background technique [0002] In the industrial field such as hoisting, an electric drive mechanism is installed at the grab or hook, so cables are required to provide electric energy for the electric drive mechanism, but when the grab or hook is working, it rises or falls with the hoisting roller, which requires cables It is also necessary to rise or fall synchronously, otherwise it is easy to cause the cable to be knotted, entangled or even torn off. The existing technology uses the cable winch roller to realize the above functions, and realizes the take-up and pay-off through the positive and negative rotation of the cable winch roller, but once the cable is entangled or stuck, if the cable winch roller continues to work, it will be torn off Cables, causing grabbing or hoisting items to fall, resulting in safety accidents. Contents of the invention [0003] The technical prob...

AI Technical Summary

Problems solved by technology

The existing technology uses the cable winch roller to realize the above functions, and realizes the take-up and pay-off through the positive and negative rotation of the cable winch roller, but once the cable is entangled or stuck, if the cable winch roller continues to work, it will be torn off Cables, causing the grasped or hoisted items to fall, resulting in safety accidents

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