A safety self-locking device for lifting equipment

Abstract

The invention relates to a safe self-locking device for hoisting equipment. The safe self-locking device comprises a fixing outer ring, an inner ring and a disc cam, wherein a circumferential groove is formed in the outer edge surface of the inner ring; a plurality of press rods are hinged to the end surface of the circumferential groove; a torsional spring is mounted at the part, hinged to the inner ring, of each press rod; an adjustment rod is hinged to one end of each press rod; a roller arranged between the fixing outer ring and one corresponding wedge surface is mounted at one end of each adjustment rod; a plurality of wedge surfaces are arranged on the outer edge surface of the inner ring; the outer edge surface of the disc cam is formed by smoothly connecting a plurality of uniformly-distributed convex parts and smooth parts in sequence; the convex parts are in contact with the inner edge surface of the inner ring; a plurality of through grooves arranged along the radial direction of the inner ring are formed in the groove bottom of the circumferential groove; the other end of each press rod is arranged in the corresponding through groove; a slide block is mounted in each through groove; one end of each slide block is in contact with the corresponding smooth part of the disc cam; an input shaft is mounted on the disc cam; an output shaft is mounted on the inner ring; a lug boss is mounted on the outer edge surface of the input shaft; a groove is formed in the inner edge surface of the output shaft; and the lug boss is arranged in the groove. The safe self-locking device provided by the invention is ingenious in structure, convenient and rapid to operate, and high in safety.

Description

technical field [0001] The invention relates to the field of lifting equipment, in particular to a safety self-locking device for lifting equipment. Background technique [0002] During the working process of lifting equipment, in order to prevent heavy objects from falling accidentally due to their gravity, a reverse self-locking device is usually installed on the lifting equipment, especially hand hoists, chain hoists, hoists, etc. Some light lifting equipment without its own power device, and because this type of equipment mainly relies on manpower to complete the operation, it is particularly important to protect the safety of the operator. At present, most of this type of equipment is equipped with reverse self-locking devices, but these self-locking devices are mostly primitive control structures, such as self-locking springs or ratchet pawls. This structure is not only unreliable, but also inconvenient to operate, such as The commonly used ratchet and pawl structure ...

AI Technical Summary

Problems solved by technology

At present, most of this type of equipment is equipped with reverse self-locking devices, but these self-locking devices are mostly primitive control structures, such as self-locking springs or ratchet pawls, etc. This structure is not only unreliable, but also inconvenient to operate, such as The commonly used ratchet and pawl structure needs to be shifted to complete self-locking or unlocking. Once it is misoperated, it may cause a major safety accident; although the self-locking spring can realize self-locking and unlocking without additional operations. Unlocking, but it is prone to slipping when working under heavy loads, and there are also major safety hazards

Images