CN200993163Y

CN200993163Y - Lower air baring for air-floating electric spindle

Info

Publication number: CN200993163Y
Application number: CN 200620154872
Authority: CN
Inventors: 汤秀清
Original assignee: 广州市大族高精电机有限公司
Current assignee: Guangzhou Haozhi Electromechanical Co Ltd
Priority date: 2006-12-18
Filing date: 2006-12-18
Publication date: 2007-12-19
Anticipated expiration: 2016-12-18

Abstract

The utility model relates to a lower air bearing for floating electric principal axis, which is a floating bearing uses for circuit board process. The utility model discloses that: a round sealed ring is arranged at the peripheral region above the middle part, and a round sealed ring is arranged at the peripheral region under the middle part, a cooling water circulation groove is arranged between the upper round sealed ring and the lower round sealed ring. The utility model can keep the principal axis operate under the lower temperature, keep the work precision, and the utility model has good safety performance, the bearing and the principal axis are separately processed and then installed, therefore the utility model is convenient to produce, promote and use.

Description

A kind of following pneumatic bearing of air supporting electricity main shaft

Technical field

The utility model relates to a kind of air-bearing, specifically a kind of air-bearing that is used in the circuit board processing.

Background technique

Circuit board is of many uses now, and it is more and more stricter to the requirement of the processing of circuit board, singly do not require long-time high-accuracy processing, and require high-speed high strength processing, therefore, someone has proposed air-floating main shaft such as ZL03153311.6 " main shaft device ", it is the air passageways generation air suspension power by internal body, and form pneumatic bearing rotating shaft is suspended in internal body, make the rotating shaft high speed rotating with motor stator then, but when main shaft is worked, singly be not that stator produces a large amount of heat, and friction and normal temperature compressed air all can bring certain heat between rotating shaft and pressurized air, when long-time intensive work, main shaft accumulates heat too much can make rotating shaft generation seize phenomenon, cause the operating accuracy of air-floating main shaft to reduce, and influence Security, moreover this main shaft needs overall time processing, order is produced main shaft and is made troubles, and is not easy to promote and use.

Summary of the invention

Goal of the invention of the present utility model is a kind of following pneumatic bearing of air supporting electricity main shaft, and it can keep main shaft to work under lower temperature, keeps operating accuracy, and Security is good, and bearing and main shaft are processed assembling more respectively, is convenient to produce, promotes and uses.

Technical solution of the present utility model is the flange in the existing bearing bottom, the axis body on flange top, there is the axial hole that connects flange and axis body the center of bearing, axis body is provided with the radial air supply passage, the air circulation passage that communicates with the radial air supply passage is arranged in the axis body, the utility model particularly is provided with O-ring seal more than the middle part of axis body periphery, and the middle part is provided with the cooling water circle groove to have down O-ring seal in the axis body between last O-ring seal and the following O-ring seal.

More than described in the utility model on axis body the top one O-ring seal is arranged.

Working principle of the present utility model is that rotating shaft is installed in down in the pneumatic bearing, be conducted to air passageways in the axis body by pressurized air during its work, at this moment, the axis body air passageways of bearing imposes radial suspension force to rotating shaft, when rotating shaft is rotated, cooling water passage in the isolation zone of axis body is supplied with cooling water, just keeps main shaft to work under lower temperature.

The utility model has the advantages that to keep main shaft to work under lower temperature, keep operating accuracy, Security is good, and bearing and main shaft are processed assembling more respectively, is convenient to produce, promotes and uses.

Description of drawings

Fig. 1 is an organigram of the present utility model;

Fig. 2 is the organigram of overlooking of the present utility model;

Fig. 3 is the organigram after the utility model assembling;

Fig. 4 is an A-A profile construction schematic representation of the present utility model;

Fig. 5 is a B-B profile construction schematic representation of the present utility model.

Embodiment

Following pneumatic bearing according to a kind of air supporting electricity main shaft shown in Figure 1, the flange 1 of bearing bottom, the axis body 2 on flange 1 top, there is the axial hole 3 that connects flange 1 and axis body 2 center of bearing, axis body 2 is provided with radial air supply passage 4, the air circulation passage 5 that communicates with radial air supply passage 4 is arranged in the axis body 2, be provided with O-ring seal 6 more than the middle part of axis body 2 peripheries, and the middle part is provided with cooling water circle groove 8 to have down O-ring seal 7 in the axis body 2 between last O-ring seal 6 and the following O-ring seal 7.

There is an O-ring seal 9 on the present invention top on axis body 2.

Claims

1, a kind of following pneumatic bearing of air supporting electricity main shaft, it has comprised the flange of bearing bottom, the axis body on flange top, there is the axial hole that connects flange and axis body the center of bearing, axis body is provided with the radial air supply passage, the air circulation passage that communicates with the radial air supply passage is arranged in the axis body, it is characterized in that being provided with O-ring seal more than the middle part of axis body periphery, and the middle part is provided with the cooling water circle groove to have down O-ring seal in the axis body between last O-ring seal and the following O-ring seal.

2, the following pneumatic bearing of a kind of air supporting electricity main shaft according to claim 1 is characterized in that there is an O-ring seal on the top on axis body.