Height limiter for crane

Abstract

The invention discloses a height limiter for a crane. The height limiter comprises a suspension arm, a sliding groove, a screw rod, a second bolt and connecting rods; a guide wheel is rotatably connected with the upper left end of the suspension arm, and a steel wire rope is arranged on the outer side of the guide wheel in an attached mode; fixing discs are fixedly installed on the front side andthe rear side of the upper left end of the suspension arm through first bolts; and rotary frames are suspended below the left part of the guide wheel, and the tops of the rotary frames are fixedly connected with the lower sides of rotary arms. The height limiter for the crane is provided with the rotary arms, the rotary frames, the connecting rods and fixed frames, and when the angle between the steel wire rope and the suspension arm is changed, the steel wire rope pulls the rotary frame to rotate with one end of the rotary arm as a fulcrum, so that the rotary frame is still fixed on the steelwire rope and the suspension arm; when the steel wire rope shakes, the fixed frame is pushed by the guide shaft to rotate with one end of the connecting rod as a fulcrum, the steel wire rope is keptin the center of the fixed frame, the structure plays a role in compensation and positioning, rigid friction is reduced while the steel wire rope shakes, abrasion is reduced, and the service life is prolonged.

Description

technical field [0001] The invention relates to the technical field of height limiters, in particular to a height limiter for cranes. Background technique [0002] The height limiter is a travel limit switch, which is mainly installed on the crane, which can effectively prevent "roof fall" accidents. [0003] The existing height limiters are divided into weight limiter and rotary limiter. The weight limiter determines the height of the hook by direct contact with the hook. This limit method has high precision, but it cannot be determined in real time without contact hook, and the slewing limiter can judge the height of the hook in real time through the moving distance of the wire rope. All of them have certain limitations. In view of the above problems, it is necessary to improve the existing equipment. Contents of the invention [0004] The object of the present invention is to provide a height limiter for cranes, to solve the problem that the existing height limiter pr...

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Problems solved by technology

[0004] The object of the present invention is to provide a height limiter for cranes, to solve the problem that the existing height limiter proposed in the above background technology is divided into a weight limiter and a rotary limiter, and the weight limiter passes through the The height of the hook is determined by direct contact with the hook. This limit method has high precision, but the hook cannot be determined in real time when it is not in contact. The rotary limiter can judge the height of the hook in real time through the moving distance of the wire rope, but the limiter will run. Errors are generated, and the accumulation of errors will easily lead to distortion of position judgment. Therefore, the existing two height limiters have certain limitations in use.

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