CN1817529A - Small high-speed constant-pressure prepressing apparatus of main bearing - Google Patents
Small high-speed constant-pressure prepressing apparatus of main bearing Download PDFInfo
- Publication number
- CN1817529A CN1817529A CN 200610049747 CN200610049747A CN1817529A CN 1817529 A CN1817529 A CN 1817529A CN 200610049747 CN200610049747 CN 200610049747 CN 200610049747 A CN200610049747 A CN 200610049747A CN 1817529 A CN1817529 A CN 1817529A
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- bearing
- axle sleeve
- slip cap
- spring
- clutch shaft
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- Rolling Contact Bearings (AREA)
- Mechanical Operated Clutches (AREA)
Abstract
A constant-pressure pre-fastening mechanism for the bearings of high-speed small mainshaft is composed of shaft sleeve, the first and the second bearings in both end holes of said shaft sleeve, mainshaft installed in said the first and the second bearings, nut at one end of the mainshaft for locating the mainshaft and the second bearing in the shaft sleeve, liner sleeve in said shaft sleeve and with one end located and pressed by the second bearing and another end with spring and its hole, the spring retainer ring and elastic retainer ring in contact with the spring holder, and slide sleeve between the first bearing and shaft sleeve for axial compensation.
Description
Technical field
The present invention relates to a kind of small high-speed constant-pressure prepressing apparatus of main bearing.
Background technology
The main shaft that requires in the miniature high-speed machining tool to run up has enough rigidity to bear radial and axial load, for satisfying the requirement of spindle operation precision and rigidity, need axis system to have dynamic balancing preferably, but main shaft is in high-speed cruising, and the bearing possibility occurs stuck owing to the spindle heat generation distortion and directly influences operate as normal.
The firmly beforehand means that existing main shaft bearing adopts is divided into location pretension and level pressure pretension, the location firmly beforehand means is located two bearings in bearing holder (housing, cover), simple in structure, convenient disassembly, if but the main shaft high-speed cruising, the temperature rise meeting of bearing makes elongation strain axially takes place, cause that bearing is stuck to be burnt even, and changed the computing ballance correction of axis system, produce the negative effect that main axis stiffness descends and running accuracy reduces, so the location firmly beforehand means is only applicable to the low speed axis system; The level pressure pretension can be realized running up of main shaft, and pretension adopts cylindrical spring or hydraulic pressure rib to carry out the level pressure pretension, adds axial elongation by camber of spring to eliminate temperature rise.
As shown in Figure 1 be level pressure pre-tightening apparatus habitual in the prior art, with nut two groups of bearings 1 and bearing 11 are limited among the axle sleeve 10 on former and later two end caps, axle sleeve 10 has a plurality of grooves to cooperate two groups of bearings, one end of spring base 4 passes through spring 5 roof pressures on mobile bearing 1, an other end is subjected to the axial thrust effect of spring 5 near 10, two groups of bearings of axle sleeve by back-up ring.But the level pressure pre-tightening apparatus of prior art, normal employing nut or other securing member on axle, place axle sleeve with location bearing and mobile bearing with bearing fixing, and spring base leans the mobile bearing cycle surface, spring one end holddown spring seat, other end roof pressure is on axle sleeve.Main shaft is in rotating at a high speed, the caused amount of unbalance of a plurality of screw threads offered for securing member on the main shaft or groove is the rigidity and the fatigue life of influence axle system directly, and when bearing outer ring axially slides in axle sleeve, bearing heating can influence fit clearance and produce the axial elongation distortion, and then influence rigidity, load-carrying ability and the high speed of machine-tool spindle system, so need the more rational pretension method and structure of research with in the axis system that is applied to miniature high-speed machinery.
Summary of the invention
In order to overcome the deficiency of pre-tightening apparatus in the prior art high-speed main spindle system, the object of the present invention is to provide reliable operation, the simple a kind of small high-speed constant-pressure prepressing apparatus of main bearing of assembling.
The present invention solves the purpose technical scheme that its technical problem adopts: comprise the clutch shaft bearing and second bearing that place in axle sleeve two stomidiums, main shaft is contained in the clutch shaft bearing and second bearing, and shaft end nut is positioned the main shaft and second bearing in the axle sleeve.Also be provided with lining in the axle sleeve, the outer of lining one end is stuck in the shoulder hole of axle sleeve and by second bearing outer ring and compresses the location, the lining other end is equipped with spring base, spring places spring base, one end of spring base leans check ring and circlip, and circlip embeds slip cap, and slip cap is located between clutch shaft bearing bearing and the axle sleeve, slip cap and clutch shaft bearing outer ring are interference fit, are matched in clearance between slip cap and the axle sleeve.
The present invention is embodied in respect to the beneficial effect of prior art:
1, the present invention is converted into pulling force with the thrust to bearing outer ring that original level pressure pre-tightening apparatus is produced, can avoid adopting nut or other securing member rigid bearing, thereby eliminate by screw thread on the axis body or the caused amount of unbalance of groove, make the axis system reliable and stable work;
2, can realize moving axially with the slip cap that bearing connects firmly mutually by interference fit, thereby can avoid bearing stuck to axis system running up down because the caused axial elongation of temperature rise compensates; Simultaneously, with the employing matched in clearance structure that bearing directly is installed in the axle sleeve is compared, the present invention realizes bearing endwisely slipping in axle sleeve by slip cap, can increase the sliding-contact area, thereby can obtain higher support stiffness under the identical situation of fit clearance;
3, slip cap is located between axle sleeve and the bearing, play the effect of transition, with respect to directly utilize bearing outer ring in axle sleeve in axial sliding structure compare, the present invention can reduce the influence of bearing heating to fit clearance, thereby allow to adopt less fit clearance between slip cap and the axle sleeve, help reducing the vibration of system;
4, except that axis body itself, bearing inner race and assembly thereof, other parts are non-rotating, can reduce the number of parts with high-precision requirement, and then can reduce axis system is carried out dynamically balanced workload.
The miniature high-speed machinery that the present invention is applied to mainly to bear radial load is as the constant-pressure prepressing apparatus of main bearing of high-speed numeric control coil winding machine etc.
Description of drawings
Fig. 1 is the structural principle schematic diagram of existing small high-speed constant-pressure prepressing apparatus of main bearing;
Fig. 2 is a structural principle schematic diagram of the present invention;
Fig. 3 is the another kind of structural principle schematic diagram of slip cap of the present invention.
Among the figure: 1, bearing, 2, slip cap, 2.1, screwed hole, 2.2, cannelure, 3, stop nut, 4, spring base, 5, spring, 6, check ring, 7, circlip, 8, main shaft, 9, lining, 10, axle sleeve, 11, bearing, 12, shaft end nut.
The specific embodiment
The invention will be further described below in conjunction with the drawings and specific embodiments.
As Fig. 1, Fig. 2, shown in Figure 3, the present invention includes the clutch shaft bearing 1 and second bearing 11 that place in 10 liang of stomidiums of axle sleeve, main shaft 8 is contained in the clutch shaft bearing 1 and second bearing 11, and shaft end nut 12 is positioned the main shaft 8 and second bearing 11 in the axle sleeve 10.Also be provided with lining 9 in the axle sleeve 10, the outer of lining 9 one ends is stuck in the shoulder hole of axle sleeve 10 and by second bearing, 11 outer rings and compresses the location, lining 9 other ends are equipped with spring base 4, spring 5 places spring base 4, one end of spring base 4 leans check ring 6 and circlip 7, and circlip 7 embeds slip cap 2, and slip cap 2 is located between clutch shaft bearing bearing 1 and the axle sleeve 10, slip cap 2 is an interference fit with clutch shaft bearing 1 outer ring, is matched in clearance between slip cap 2 and the axle sleeve 10.
Described slip cap 2 outer cylinder surfaces are provided with at least one cannelure 2.2.The described clutch shaft bearing 1 and second bearing 11 are deep groove ball bearing or the face-to-face angular contact ball bearing of installing.
Level pressure pre-tightening apparatus provided by the invention with the movable terminal bearing 1 of main shaft 8 by interference fit place can be in axle sleeve 10 along main shaft in axial sliding in the slip cap 2; Spring base 4 is fixed on the lining 9 by screw thread, slip cap 2 is by parts and lining 10 realization resilient connection such as spring base 4, spring 5, check ring 6 and circlips 7, and the pretension assembly integral body that shaft end nut 12 finishes assemblings such as axle 8, the bearing 1 and 11 of locating, lining 9 is pressed into axle sleeve 10 and is positioned wherein; Because lining 9 is positioned in the axle sleeve 10, when spring 5 is compressed under shaft end nut 12 effects, acting force of the spring to the right is delivered on the slip cap 2 by check ring 6 and circlip 7 successively vertically, and then the outer ring that makes bearing 1 is subjected to active force to the right, finally makes mobile bearing 1 and location bearing 11 obtain pretension simultaneously.
The present invention utilizes the space between the bearings, the thrust to bearing outer ring that the level pressure pre-tightening apparatus that is usually located between the two bearings is produced is converted into pulling force, can save nut or other securing member rigid bearing, thereby avoid by the screw thread on the main shaft or the caused amount of unbalance of groove and to the weakening of axis body rigidity and fatigue life.
Further, increase one or several cannelures 2.2 in slip cap 2 outer cylinder surface appropriate locations, this improvement structure can reduce the resistance to sliding between slip cap and the axle sleeve; By in cannelure 2.2, filling moderate lubrication fat, can further reduce sliding-frictional resistance and increase supporting damping; According to actual layout, quantity, groove width and the groove depth that requires to select groove of equipment, can regulate the support stiffness of bearings system, thereby be convenient to according to actual needs the support system dynamics be controlled.
Described spring base 4 is fixed in lining 9 by screw thread, and it is fixing also can to increase stop nut 3.Spring base 4 has spring eye, can be with the spring 5 stable holes that place.
The angular contact ball bearing that two groups of above-mentioned bearings can be deep groove ball bearing or install face-to-face, bearing adopts grease lubrication.Described slip cap 2 bottom design have four screwed holes 2.1 in order to dismounting bearing 1.
Claims (3)
1. small high-speed constant-pressure prepressing apparatus of main bearing, comprise the clutch shaft bearing (1) and second bearing (11) that place in axle sleeve (10) two stomidiums, main shaft (8) is contained in clutch shaft bearing (1) and second bearing (11), shaft end nut (12) is positioned main shaft (8) and second bearing (11) in the axle sleeve (10), it is characterized in that: also be provided with lining (9) in the axle sleeve (10), the outer of lining (9) one ends is stuck in the shoulder hole of axle sleeve (10) and by second bearing (11) outer ring and compresses the location, lining (9) other end is equipped with spring base (4), spring (5) places spring base (4), one end of spring base (4) leans check ring (6) and circlip (7), circlip (7) embeds slip cap (2), slip cap (2) is located between clutch shaft bearing bearing (1) and the axle sleeve (10), slip cap (2) is an interference fit with clutch shaft bearing (1) outer ring, is matched in clearance between slip cap (2) and the axle sleeve (10).
2. small high-speed constant-pressure prepressing apparatus of main bearing according to claim 1 is characterized in that: described slip cap (2) outer cylinder surface is provided with at least one cannelure (2.2).
3. small high-speed constant-pressure prepressing apparatus of main bearing according to claim 1 is characterized in that: described clutch shaft bearing (1) and second bearing (11) are deep groove ball bearing or the face-to-face angular contact ball bearing of installing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100497471A CN100368126C (en) | 2006-03-08 | 2006-03-08 | Small high-speed constant-pressure prepressing apparatus of main bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100497471A CN100368126C (en) | 2006-03-08 | 2006-03-08 | Small high-speed constant-pressure prepressing apparatus of main bearing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1817529A true CN1817529A (en) | 2006-08-16 |
| CN100368126C CN100368126C (en) | 2008-02-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100497471A Expired - Fee Related CN100368126C (en) | 2006-03-08 | 2006-03-08 | Small high-speed constant-pressure prepressing apparatus of main bearing |
Country Status (1)
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| CN (1) | CN100368126C (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101982665A (en) * | 2010-09-02 | 2011-03-02 | 阀安格水处理系统(太仓)有限公司 | Structure utilizing single direction thrust bearing |
| CN102615297A (en) * | 2012-04-18 | 2012-08-01 | 清华大学深圳研究生院 | Turbine pneumatic main shaft |
| CN101704117B (en) * | 2009-07-06 | 2012-09-26 | 厦门精合电气自动化有限公司 | High-speed mainshaft bearing constant-pressure pre-loading device |
| CN102886713A (en) * | 2012-10-19 | 2013-01-23 | 无锡市百顺机械厂 | Internal grinding device for grinder |
| CN103029020A (en) * | 2012-06-18 | 2013-04-10 | 上海崇明机床厂 | Device for improving precision of steel ball machine tool plate groove |
| CN105332115A (en) * | 2014-05-30 | 2016-02-17 | 舍弗勒技术股份两合公司 | Bearing assembly |
| CN105798837A (en) * | 2014-12-30 | 2016-07-27 | 国核电站运行服务技术有限公司 | Pretightening tool and pretightening method of joint bearing for pressure container checking manipulator of nuclear power plant |
| CN108817422A (en) * | 2018-08-30 | 2018-11-16 | 广东今科机床有限公司 | A kind of composite metal stock-removing machine main shaft |
| CN113770406A (en) * | 2021-08-09 | 2021-12-10 | 浙江王力安防产品有限公司 | Bench drilling machine |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0751904A (en) * | 1993-08-09 | 1995-02-28 | Ntn Corp | Pre-load adjusting device for spindle bearing |
| JPH0890306A (en) * | 1994-09-21 | 1996-04-09 | Enshu Ltd | Main spindle device of metal cutting machine tool |
| JP2004034222A (en) * | 2002-07-03 | 2004-02-05 | Mitsubishi Heavy Ind Ltd | Main spindle unit and method for controlling preload |
| CN1259162C (en) * | 2003-11-28 | 2006-06-14 | 湖南大学 | High speed main shaft pretension method and apparatus by integration of constant pressure pretension with positioning pretension |
| CN2865938Y (en) * | 2006-03-08 | 2007-02-07 | 浙江大学 | Small size high-speed main-spindle bearing constant pressure prtightening device |
-
2006
- 2006-03-08 CN CNB2006100497471A patent/CN100368126C/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101704117B (en) * | 2009-07-06 | 2012-09-26 | 厦门精合电气自动化有限公司 | High-speed mainshaft bearing constant-pressure pre-loading device |
| CN101982665A (en) * | 2010-09-02 | 2011-03-02 | 阀安格水处理系统(太仓)有限公司 | Structure utilizing single direction thrust bearing |
| CN102615297A (en) * | 2012-04-18 | 2012-08-01 | 清华大学深圳研究生院 | Turbine pneumatic main shaft |
| CN103029020A (en) * | 2012-06-18 | 2013-04-10 | 上海崇明机床厂 | Device for improving precision of steel ball machine tool plate groove |
| CN102886713A (en) * | 2012-10-19 | 2013-01-23 | 无锡市百顺机械厂 | Internal grinding device for grinder |
| CN105332115A (en) * | 2014-05-30 | 2016-02-17 | 舍弗勒技术股份两合公司 | Bearing assembly |
| CN105332115B (en) * | 2014-05-30 | 2020-07-31 | 舍弗勒技术股份两合公司 | Bearing assembly |
| CN105798837A (en) * | 2014-12-30 | 2016-07-27 | 国核电站运行服务技术有限公司 | Pretightening tool and pretightening method of joint bearing for pressure container checking manipulator of nuclear power plant |
| CN105798837B (en) * | 2014-12-30 | 2018-01-02 | 国核电站运行服务技术有限公司 | Nuclear plant pressure vessels check the pre-tightening tool and pre-tension method of oscillating bearing used in manipulator |
| CN108817422A (en) * | 2018-08-30 | 2018-11-16 | 广东今科机床有限公司 | A kind of composite metal stock-removing machine main shaft |
| CN113770406A (en) * | 2021-08-09 | 2021-12-10 | 浙江王力安防产品有限公司 | Bench drilling machine |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100368126C (en) | 2008-02-13 |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080213 Termination date: 20140308 |