A large external rotary motion mechanism

Abstract

The invention discloses a large-scale external rotary motion mechanism, comprising a central column, a rotary frame and a rotary centering device. The rotary frame is rotated around the central column by the rotary centering device, and the rotary centering device is arranged on the central column. Between it and the rotating frame, the rotary centering device includes at least two groups of rolling units, at least two groups of rolling units are located at different positions in the circumferential direction of the outer circumferential surface of the central column, and the rolling units are non-fixedly installed on the rotating frame, so The rolling unit is provided with a guide wheel group, the guide wheel group rolls on the outer circumferential surface of the center column, the guide wheel group swings relative to the center column and the rotating frame, and the rotation center of the rotating frame passes through the guide wheel group. The swing is concentric with the central column. The large-scale external rotary motion mechanism of the present invention does not need to set up another centering tool, can center automatically, and has high assembly precision of the rolling pair and balanced force.

Description

technical field [0001] The invention relates to the technical field of large-scale construction machinery rotating equipment structures, in particular to a large-scale external rotary motion mechanism. Background technique [0002] In construction machinery, based on comprehensive factors such as cost, environmental conditions, and ease of implementation, the guide wheel raceway structure is often used as the rotary centering and radial support mechanism for the large-diameter rotary center column (such as figure 1 shown). This centering mechanism is widely used and matures day by day. In this structure, the center of the center column is the center of rotation of the frame. There are several support wheels 4 installed on the frame, usually an even number of 4, 6, 8, etc. according to the diameter of the central column, and are generally evenly and symmetrically distributed by the central column, and these supporting wheels are pre-positioned on the central column. constr...

AI Technical Summary

Problems solved by technology

However, with this structure, it is difficult to accurately center the rolling pair, and the adjustment of the gap between the support wheel 4 and the raceway is labor-intensive and time-consuming, and it is difficult to ensure the accuracy required for the gear meshing backlash when the planetary gear transmission pair is installed on the rotary frame requirements

As a result, during the operation of the equipment, there are often phenomena such as uneven force on the support wheel 4, easy pitting of the raceway, unstable transmission, vibration, and loud noise, which increases the workload of equipment installation, adjustment, and daily maintenance.

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