Balance mechanism of crane

Abstract

The invention provides a balance mechanism of a crane. The balance mechanism comprises a balance plate, a counterweight suspension arm and a plurality of elastic assemblies. The balance plate is connected with a slewing part of a slewing mechanism through the elastic assemblies. Each elastic assembly comprises a limiting screw, a limiting nut and a spring. Guide holes matched with the limiting screws are formed in the slewing part. The limiting screws penetrate through the balance plates and the guide holes of the rotating part and are matched with the limiting nuts. The springs are located between the slewing part and the balance plate. A lifting arm of the crane is installed on the upper side of the balance plate, the counterweight suspension arm is also installed on the upper side of the balance plate, and the extending direction of the lifting arm is opposite to that of the counterweight suspension arm. The balance mechanism has the beneficial technical effects that dynamic adjustment of the counterweight moment is realized through the counterweight suspension arm, so that the center of the crane is stabilized near the center line of the slewing mechanism, and the maximizationof the hoisting weight is realized. The springs of all the elastic assemblies provide support for the balance plate and all equipment on the upper side all the time, and the slewing mechanism and thecrane supporting equipment can be evenly stressed.

Description

technical field [0001] The invention relates to a balance mechanism of a crane. Background technique [0002] A crane refers to a multi-action hoisting machine that vertically lifts and horizontally transports heavy objects within a certain range. Common cranes include bridge cranes, ship cranes, crawler cranes and truck cranes. The heavy control room is set separately, which has the characteristics of good maneuverability and rapid transfer. [0003] Both crawler cranes and truck cranes are constructed by installing a slewing mechanism on the frame (common slewing mechanisms are column slewing mechanism and turntable slewing mechanism). The slewing mechanism has a slewing part and a non-rotating part. It is fixedly connected with the frame of the crane, and the main equipment such as the crane's lifting control room, lifting arm, and winch are directly installed on the slewing part of the slewing mechanism. When the equipment rotates, and especially when the truck crane p...

AI Technical Summary

Problems solved by technology

[0004] However, the actual lifting weight of the existing crane has a boom that cannot reach the designed lifting weight. Except for the disturbance factor of the boom, the main reason is that the counterweight of the crane is mostly fixed, and the counterweight is installed on the rear side of the crane. It is impossible to dynamically give the balance force of the boom of the crane, so that the crane is prone to the hidden danger of tipping. In actual use, only the weight of the cargo lifted by the boom can be reduced to ensure the safety of the crane; Telescopic outriggers are often faulty or damaged due to high-intensity use, which affects the overall service life of the crane

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