CN2105793U

CN2105793U - High precision ac servo motor

Info

Publication number: CN2105793U
Application number: CN 91229157
Authority: CN
Inventors: 周先镐; 周风云; 陈奇冰; 李存军; 陈燕玉
Original assignee: ZHOUSHAN TELECOMMUNICATION ELECTRICAL MACHINERY GENERAL PLANT
Current assignee: ZHOUSHAN TELECOMMUNICATION ELECTRICAL MACHINERY GENERAL PLANT
Priority date: 1991-11-18
Filing date: 1991-11-18
Publication date: 1992-05-27

Abstract

The utility model provides a high precision ac servo motor. At the lower end of a stator bearing room arranging a spindle, a rolling bearing is used to replace an anti-thrust pad and a plane slide piece having the special material requirements and being produced difficultly in the prior art, and thereby, the requirement of the bearing structural materials arranging the spindle of the high precision ac servo motor provided by the utility model is reduced. In addition, the high precision ac servo motor provided by the utility model can also use an oil-resistant rubber gasket to replace the two-piece elastic gasket of the prior art.

Description

High precision ac servo motor

The utility model relates to a kind of high-precision AC servomotor, especially be used as the high-precision AC servomotor of open-reel recorder for broadcasting capstan motor.

The high-precision AC servomotor requires rotation precision to have high reliability, and the key that reach this requirement is that the bearing arrangement of electric machine main shaft is installed.The high-precision AC servomotor that the PR99 type recorder that Switzerland Lan Fukesi (REVOX) company makes is used, its bearing arrangement that main shaft is installed is that an oiliness bearing is adopted in the upper end in bearing chamber, the lower end adopt an oiliness bearing its down and with a thrust pad and a slice planar slide sheet.Though this structure can reach high rotation precision, because wherein thrust pad and plane slide are made with special special-purpose wearing composite material, and make this structure have material requirements special, make the defective of difficulty.

At this defective of prior art, the purpose of this utility model is exactly to provide a kind of bearing arrangement that main shaft is installed that material is not had specific (special) requirements, makes simple high-precision AC servomotor.

High-precision AC servomotor provided by the utility model, its stator core are fixed on the stator support of bearing chamber and constitute stator (9).In the bearing chamber of stator, an oiliness bearing is respectively installed at two ends up and down, and lower end oiliness bearing (3) is down and with a rolling bearing.Bearing limits its axial location by cannelure in back-up ring and the bearing chamber, and lining (7) and malthoid (8) liner are arranged between oiliness bearing and the back-up ring.Main shaft (2) then is installed in the bearing with the prescription formula of living.So that change main shaft at any time with different output shaft diameters.External rotor (1) is fixed on the main shaft with intermediate plate (10).Intermediate plate also makes main shaft step end face and external rotor endoporus hold to cover flange to press rolling bearing inner ring and the axial endplay of controlling main shaft.And high-precision AC servomotor provided by the utility model is used oil resistant rubber packing ring (5) liner between rolling bearing and back-up ring (6).Say that generally the rolling bearing of the installation main shaft of high-precision AC servomotor provided by the utility model is single-row ball bearing (4).

High-precision AC servomotor provided by the utility model, the behavior in service that has not only kept prior art, and owing to replaced thrust pad and the plane slide in the prior art with a rolling bearing, guaranteed reliability, eliminated the material requirements of using thrust pad and slide and causing special, make complicated defective.Owing to the minimizing of number of spare parts, improved work efficiency and simplified mounting process simultaneously.

Figure one is a three-dimensional parts explosion of the present utility model.

Figure two is figure and bearing chamber lower end partial sectional views of partly cuing open of the present utility model.

Among the figure: 1: external rotor 2: main shaft 3: oiliness bearing

4: single-row ball bearing 5: oil resistant rubber packing ring 6: back-up ring

7: lining 8: malthoid 9: stator

10: intermediate plate

Embodiment: the described high-precision AC servomotor of present embodiment can be as the capstan motor of PR99 type recorder.As shown in the figure, except that the bearing arrangement of bearing chamber lower end, other structures all with the original-pack capstan motor of this PR99 type recorder, promptly the structure of prior art is identical.In the bearing chamber lower end, present embodiment holds (4) with a 608ZZ profile shaft and has replaced thrust pad and plane slide in the prior art structure, has replaced two elastic washers in the prior art with the oil resistant rubber packing ring again.Its performance reaches GB1778-79 standard A level level.

Claims

1, a kind of high-precision AC servomotor, joining main shaft by stator, cup-shaped solid external rotor and work is constituted, of the present utility modelly be characterised in that the upper end bearing of the indoor installation of stator bearing is an oiliness bearing, bottom end bearing is an oiliness bearing (3) and below it and a rolling bearing of usefulness.

2, high-precision AC servomotor as claimed in claim 1 is characterized in that rolling bearing and limits between the back-up ring (6) of this axial position of rolling bearing that a slice oil resistant rubber packing ring (5) is arranged.

3, high-precision AC servomotor as claimed in claim 1 or 2 is characterized in that rolling bearing is single-row rolling bearing (4).