A vertical axis system of a precision turntable

Abstract

The invention discloses a precise turntable vertical shaft system. The precise turntable vertical shaft system comprises a carrying table, a direction rotating shaft, angle contact ball bearings, a thrust ball bearing and a direction fixed box; the direction rotating shaft and the angle contact ball bearings are both arranged in the direction fixed box; the upper end of the direction rotating shaft is supported on the carrying table; one pair of angle contact ball bearings is provided, and is mounted at the two ends of the direction rotating shaft back to back; the angle contact ball bearing at the upper end of the direction rotating shaft is a first angle contact ball bearing, and the angle contact ball bearing at the lower end of the direction rotating shaft is a second angle contact ball bearing; and a bearing mounting nest is arranged between the first angle contact ball bearing and the direction fixed box. The precise turntable vertical shaft system improves the rotating precision of a revolving shaft system, increases the rigidity of a bearing composition, reduces the axial and radial jump quantities of supports, reduces the noise of vibrators on the bearings, improves the distribution rationality of loads in the bearings, prolongs the service life of the bearings, and eliminates the play of the bearings.

Description

technical field [0001] The invention belongs to the technical field of precision optical application mechanical equipment, relates to a precision turntable vertical axis system, and can be applied to the technical field of precision optical application mechanical equipment or other similar mechanical equipment. Background technique [0002] Basic requirements and types of precision mechanical shafting In many precision machinery, such as optical splitters, theodolites, goniometers and other precision mechanical instruments and equipment, the requirements for the rotation accuracy of their spindles are getting higher and higher. [0003] The key to the accuracy of the main shaft system lies in the selection of bearings and the design of combinations. In many mechanical equipment, such as high-precision machine tool spindles, angular contact ball bearings or bearing combinations are often used as the shafting structure. In order to improve the rotation accuracy of the rotary s...

AI Technical Summary

Problems solved by technology

However, a pair of combined angular contact ball bearings can bear both radial load and certain axial load. The boss of the inner ring is pre-tightened with the outer ring of the angular contact ball bearing, so there is often over-positioning during the assembly process, that is, the load-bearing parts of the vertical shafting are not unique, which affects the stability of the shafting

In addition, in order to avoid over-positioning of this structure, it is often necessary to grind the parts during the assembly process, and the assembly process is poor.

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