Novel direct current driving turntable structure

Abstract

The invention relates to a novel rotary table driven by a DC motor. The motor stator is mounted on a frame, windings and an iron core are mounted on the inner side of the stator, and a commutator is arranged at the lower end of the windings. The wire inlet terminal and the brush of the conducting ring are fixed on the lower end of the stator; the motor stator is fixed on the main shaft; the worktable face is connected to the main shaft by bolts; an alnico is fixed on the stator, the brush with a conducting ring is mounted on the bottom of the stator by a frame; the brush of the commutator is mounted on the brush frame provided with a conducting ring, and the brush of the commutator contacts with the commutator; and the conducting-ring brush contacts with the conducting ring arranged on the brush frame provided with a conducting ring. The part between the main shaft and the frame is supported by a thrust ball bearing and an angular-contact ball bearing, and the part between the worktable face connected with the main shaft and the frame is supported by a tapered roller bearing. The rotary table with such structure has the advantages of that the rotor has small moment of inertia, the fluctuation of moment is small, the speed is low, the performance is sound, and the cost is low; particularly when load acceleration requires relatively high control accuracy, such structure is easy to meet the technical requirements of the rotary table and reduce the cost.

Description

Technical field: [0001] The invention relates to a novel direct current drive turntable structure driven by a direct current motor. Background technique [0002] At present, with the development of simulation technology, the turntable is required to have good performance, high acceleration, high frequency response, high precision and low cost, so the structure of the equipment plays a decisive factor. Generally, the structure of a single-axis table is composed of a table, a shaft, a bearing, a drive, and a frame. Torque motors are the preferred drive. Torque motors are usually sub-assembled, that is, the motor itself has no housing and bearings, but is directly installed on the product to form a whole with the product. When selecting a torque motor, it is desired to have light weight, large torque, small moment of inertia, and small torque fluctuation. At present, brushed permanent magnet DC torque motors are commonly used. The brushed DC torque motor used in the turntabl...

AI Technical Summary

Problems solved by technology

It is difficult for the turntable with this structure to meet the simulation requirements of heavy load and high frequency response.

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