2results about How to "Realize automatic braking" patented technology

The present application relates to a kind of pure mechanical friction brake and its working method, including input shaft disc, spacer, copper friction plate, steel friction plate, rear end plate, output shaft, spring, spring backing plate, bearing, pin, cam, lever, bearing.Compared with prior art, the pure mechanical friction brake of the present application is entirely composed of mechanical parts, the size of brake friction can be set by adjusting the friction plate and spring, the compression length of spring is adjusted by the extrusion of lever on cam, so as to adjust the extrusion force between friction plate, finally realize the conversion of brake and drive of cam, to realize the function of basic brake, at the same time, automatic parking can be realized when power failure occurs to deal with emergency.

This invention discloses a cable retrieval device, comprising: a braking device including: a locking disc, a friction plate, a protective cover, at least one adjusting member, a brake lever, and a locking block; the locking disc is mounted on a drum, and its outer periphery is provided with unidirectionally inclined serrations; one end of the adjusting member is disposed on the protective cover, and the other end is disposed on the friction plate, maintaining a certain distance between the friction plate and the drum; the brake lever is hinged to the friction plate; the locking block is connected to the brake lever via a connecting rod; when the brake lever changes from a tensioned state to a relaxed state, the friction plate drives the brake lever to reset under the restoring force of the adjusting member, and the brake lever drives the locking block to contact the locking disc via the connecting rod; when the brake lever changes from a relaxed state to a tensioned state, the brake lever drives the locking block to separate from the locking disc via the connecting rod. The cable retrieval device of this invention can retrieve flexible rope-like objects from underground to the surface or lower them into the well and achieve automatic braking.