Crane and slewing bearing thereof

Abstract

The invention discloses a slewing bearing comprising a jacket part in connection with a turntable and an embedded part in connection with a frame. The embedded part is nested in the jacket part, and the axial segment of the embedded part stretches out from a circular opening of the jacket part. Between the radial segment of the embedded part and the upper and lower inner wall of the jacket part, two rings of upper rollers and two rings of lower rollers are respectively arranged. An outer ring of middle roller is mounted between an outer circumferential surface of the radial segment and an inner inside wall of the outer circumference of the jacket part. And the slewing bearing is characterized in that an inner ring of middle roller is disposed between an inner circumferential surface of the radial segment and an inner inside wall of the inner circumference of the jacket part, and the outer ring of middle roller and the inner ring of middle roller are positioned in one plane. The slewing bearing of the invention can reduce radial friction, lower rotary resisting moment, improving transmission uniformity of forces, so that the radial bearing capacity of the slewing bearing can be further enhanced. The invention also discloses a crane containing the above slewing bearing.

Description

technical field [0001] The invention relates to the technical field of hoisting equipment, in particular to a crane and its slewing support. Background technique [0002] As a large-scale lifting equipment, cranes have been widely used in the construction of various projects. [0003] As the core component of lifting equipment such as cranes, the slewing ring is used to connect the turntable and the frame, so that the turntable can rotate relative to the frame, and can also transmit the tension pressure and torque during the working process. [0004] Please refer to figure 1 and figure 2 , figure 1 It is a schematic diagram of the installation structure of the slewing bearing in the prior art, figure 2 It is a structural schematic diagram of a radial cross section of a five-row roller slewing bearing in the prior art. [0005] In the prior art, the main structure of the slewing bearing 03 can be divided into two parts, including the outer casing part 05 and the embedd...

AI Technical Summary

Problems solved by technology

The bolt group is inserted into the blind hole, and it is easy to generate lateral force during installation, which leads to the weakening of the bearing capacity of the bolt group

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