Buffer device, crane boom and crane

Abstract

The invention discloses a buffer device, a crane boom and a crane. The buffer device comprises a first base, a first spring, a swing rod and a rolling wheel; the first base is used for being fixedly arranged on a first base part; one end of the swing rod is hinged to the first base, and the other end of the swing rod is connected with the rolling wheel; the two ends of the first spring are connected with the first base and the swing rod respectively; and the swing rod is configured to enable the rolling wheel to move along the surface of a second base part, and the first spring is configured to change from a natural state to a stretching state when the rolling wheel moves along the surface of the second base part. By means of the buffer device, collision impact between a supporting rod and the boom can be effectively reduced, and safety of equipment and personnel is protected.

Description

technical field

[0001] The invention relates to the technical field of cranes, in particular to a buffer device, a crane jib and a crane. Background technique

[0002] The brace of the jib of the existing crane is a non-powered part, which swings back and forth only by its own gravity. When the boom is lifted, the boom drives the brace to swing through the telescopic pull rod. When the brace swings to the vertical state , the angle between the strut and the jib is about 40°~60°. If the jib continues to move at this time, the strut will rotate around its hinge point with the jib under the action of its own gravity. Therefore, during the rotation of the pole, the U-shaped groove of the arc-shaped plate welded on the pole will collide with the fixed pin on the boom. This collision is a hard contact, which has a large impact on the boom, and It is easy to damage the curved plate. In addition, the above-mentioned collision may also cause the risk of jamming of the strut. Conte...

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