Pivot structure and crane mast assembly having same

Abstract

The invention provides a pivotal structure and a crane derrick component with the same. The pivotal structure comprises a base, a rotating body, a pivoting mechanism and a positioning mechanism, wherein the rotating body is rotationally arranged on the base through the pivoting mechanism and comprises a first position and a second position; the positioning mechanism comprises a limiting seat and a limited piece; the limiting seat is fixed on the base and comprises a first limiting part and a second limiting part; the limited piece comprises a first limited part matched with the first limiting part and a second limited part matched with the second limiting part; the limiting seat also comprises a third limiting part or the pivoting mechanism comprises a third limiting part, and the rotating body is defined at the first position under co-action of the first limiting part and the third limiting part; the pivoting mechanism comprises a fourth limiting part or the limiting seat also comprises a fourth limiting part, and the rotating body is defined at the second position under co-action of the second limiting part and the fourth limiting part. According to the technical scheme, the pivotal structure is convenient to operate.

Description

technical field [0001] The present invention relates to the technical field of connecting structures, in particular to a pivoting structure and a crane mast assembly having the same. Background technique [0002] Currently, if figure 1 As shown, when the crawler crane maintains pulleys and electrical components, etc., it is necessary to turn the stairs 20' on the mast 10' through a pivoting device and open them laterally, so that maintenance personnel can go up to the top of the mast 10' along the stairs 20' for maintenance. top parts. When the maintenance is completed, the stair 20' needs to be rotated to the original position by the pivoting device, so as to prevent mutual abrasion with the wire rope. Such as figure 2 As shown, the pivoting device includes a base 31', a pivoting member 32' and two pin shafts 33', three positioning holes are provided on the base 31', two connecting holes are provided on the pivoting member 32', and a pin shaft 33' passes through one of...

AI Technical Summary

Problems solved by technology

like figure 2 As shown, the pivoting device includes a base 31', a pivoting member 32' and two pin shafts 33', three positioning holes are provided on the base 31', two connecting holes are provided on the pivoting member 32', and a pin shaft 33' passes through one of the three positioning holes and one of the two connection holes, the pivot member 32' rotates around the pin 33', and the other hole in the two connection holes passes through the rotation of the pivot member 32' There are two positions corresponding to the other two holes in the three positioning holes, and the opening and reset of the staircase 20' can be realized by passing another pin shaft 33' through the connecting hole and the corresponding positioning hole, The pin shaft 33' plays a positioning role, but when the above-mentioned pivoting device is operated, it is necessary to frequently disassemble and assemble the pin shaft 33' which plays a positioning role, which makes the operation cumbersome and inconvenient

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