CN101162857B

CN101162857B - Novel direct current driving turntable structure

Info

Publication number: CN101162857B
Application number: CN200610149629A
Authority: CN
Inventors: 方中祥; 赵肖田; 任宝明
Original assignee: BEIJING RUISAI GREAT WALL AVIATION MEASUREMENT CONTROL TECHNOLOGY CO LTD; China Aviation Industry Corp of Beijing Institute of Measurement and Control Technology
Current assignee: Beijing Ruisai Great Wall Aviation Measurement Control Technology Co.,Ltd.; China Aviation Industry Corp of Beijing Institute of Measurement and Control Technology
Priority date: 2006-10-13
Filing date: 2006-10-13
Publication date: 2010-05-19
Anticipated expiration: 2026-10-13
Also published as: CN101162857A

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 thebrush 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, thefluctuation 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

A kind of direct current driving turntable structure

Technical field: the present invention relates to a kind of direct current driving turntable structure that adopts direct current machine to drive.

Background technology

At present, along with emulation technology development, require that the turntable performance is good, acceleration is big, frequency response is high, precision is high, cost is low, so the structure of equipment plays the factor of decision.Usually the structure of single shaft platform is made up of table top, axle, bearing, driving, framework.The first-selected torque motor of drive unit.Torque motor all is to select separately loading for use usually, and promptly motor itself does not have shell and bearing, forms an integral body but directly be installed on the product with product.When selecting torque motor for use, wish in light weight, moment is big, moment of inertia is little, torque fluctuations is little, at present, commonly used have a brush permanent magnet D.C. torque motor.The brush direct current torque motor that has that turntable adopts all adopts winding and iron core on rotor, the structure of magnet steel on stator, and the pair of bearings group is installed in the two ends of rotor axis of electric respectively.The turntable of this kind structure is difficult to realize the simulation requirements of big load, high frequency sound.

Summary of the invention

The purpose of this invention is to provide a kind of a kind of direct current driving turntable structure that is applicable to big load, high frequency sound simulation requirements.Technical solution of the present invention is, motor stator is installed on the framework, and winding and iron core are housed on the stator inboard, and commutator is in the lower end of winding; Input terminal and conducting ring brush are fixed on the stator lower end; Rotor is fixed on the main shaft, work top links to each other with main shaft with bolt, magnet steel is fixed on the rotor, the brush carrier of band conducting ring is contained in the bottom of rotor, the brush of commutator is installed on the brush carrier of band conducting ring, commutator brush contacts with commutator, the conducting ring brush with the band conducting ring brush carrier on conducting ring contact; Support by thrust ball bearing and angular contact ball bearing between main shaft and the framework, support by taper roll bearing between work top that is connected with main shaft and the framework.Work top is single axle table or three-axle table.

Effect of the present invention, the moment of inertia of rotor is little, and torque fluctuations is little, and low-speed performance is good, and the power amplifier cost is low, and especially the load acceleration requires big especially control precision to require to select for use this kind structure to realize the specification requirement of turntable easily, and can reduce cost when high.Because anti-outer DC brush torque motor was contained in brush on the rotor in the present invention had adopted, the power supply lead wire of brush is inverted on the external terminal on the stator by conducting ring, the access power supply, and then the moment of inertia of rotor is little, is 11kgm ², the acceleration of turntable can reach 29000 °/s ²The low-speed performance of turntable is good, and torque fluctuations is less than 0.5%; Electric current is little, and energy consumption is low, be easy to realize the high-precision requirement of high frequency sound, and cost is low, and is under the measure-alike situation of profile, in light weight.

Description of drawings

Fig. 1 is a structural representation of the present invention.

Embodiment

The diagram turntable is by the brush 10 of work top 1, main shaft 2, stator 4, rotor 5, magnet steel 6, winding and iron core 7, framework 8, commutator 9, commutator, brush carrier 11, conducting ring brush 12, input terminal 13, thrust ball bearing 14, angular contact ball bearing 15, the taper roll bearing 17 of band conducting ring, bearing (ball) cover 16 compositions such as grade, motor stator 4 is installed on the framework 8, winding and iron core 7 are housed on stator 4 inboards, and commutator 9 is in the lower end of winding; Input terminal 13 is fixed on stator 4 lower ends with conducting ring brush 12; Rotor 5 is fixed on the main shaft 2, work top 1 usefulness bolt 3 links to each other with main shaft 2, magnet steel 6 is fixed on the rotor 5, the brush holder 11 of band conducting ring is contained in the bottom of rotor 5, the brush 10 of commutator is installed on the brush carrier 11 of band conducting ring, commutator brush 10 contacts with commutator 9, conducting ring brush 12 with the band conducting ring brush carrier 11 on conducting ring contact; Support by thrust ball bearing 14 and angular contact ball bearing 15 between main shaft 2 and the framework 8, support by taper roll bearing 17 between work top 1 that is connected with main shaft 2 and the framework 8.

Work top 1 is single axle table or three-axle table.

Turntable is by framework 8, main shaft 2, work top 1, be contained in conducting ring brush 12 on the rotor 4, and the power supply lead wire of conducting ring brush 12 is inverted to interior anti-outer DC brush torque motor and three the bearings compositions that insert power supply on the external input terminal 13 on the stator 4 by conducting ring 11.Power adopts the outer direct current torque motor of internal return directly to drive, and motor stator 4 is installed on the framework 8, and rotor 5 is fixed on the main shaft 2.Work top 1 links to each other with main shaft 2, links to each other rigidity and intensity when guaranteeing transmission of torque with rotor 5 by main shaft 2.In the stage body structure, adopt a high-accuracy angular contact ball bearing 15 and taper roll bearing 17 radial locations, thrust ball bearing 14 axial support to guarantee the stability of work top 1 running, strengthen the anti-ability of overturning.For reducing the volume of testing stand, thrust ball bearing 14 is arranged on internal rotor, carries out the pretension adjustment by 16 pairs of bearings of bearing gland, can improve effectively and transmit rigidity and torque-transfer capability.

Main shaft 2 and work top 1 adopt high strength high-quality Birmasil to make to reduce moment of inertia.Stage body framework 8 materials adopt magnesium iron, and hollow shaft structure is so that threading.For guaranteeing the stability of turntable structure, stage body quenches, temper, to improve intensity, to increase toughness, eliminates internal stress and stable dimensions.

This turntable has been realized the performance of big load, high frequency sound, low velocity owing to adopted this new structure.

Claims

1. a direct current driving turntable structure is made up of motor, work top, framework and bearing, it is characterized in that, motor stator is installed on the framework, and winding and iron core are housed on the stator inboard, and commutator is in the lower end of winding; Input terminal and conducting ring brush are fixed on the stator lower end; Rotor is fixed on the main shaft, work top links to each other with main shaft with bolt, magnet steel is fixed on the rotor, the brush carrier of band conducting ring is contained in the bottom of rotor, the brush of commutator is installed on the brush carrier of band conducting ring, commutator brush contacts with commutator, the conducting ring brush with the band conducting ring brush carrier on conducting ring contact; Support by thrust ball bearing and angular contact ball bearing between main shaft and the framework, support by taper roll bearing between work top that is connected with main shaft and the framework.

2. direct current driving turntable structure according to claim 1 is characterized in that, work top is single axle table or three-axle table.