CN203726240U - High-speed ball screw unit - Google Patents
High-speed ball screw unit Download PDFInfo
- Publication number
- CN203726240U CN203726240U CN201420108483.2U CN201420108483U CN203726240U CN 203726240 U CN203726240 U CN 203726240U CN 201420108483 U CN201420108483 U CN 201420108483U CN 203726240 U CN203726240 U CN 203726240U
- Authority
- CN
- China
- Prior art keywords
- rolling bearing
- speed ball
- ball screw
- bearing
- nut
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model relates to a high-speed ball screw unit which comprises a bearing block. A rolling bearing and a mounting cavity are arranged in the bearing block, the rolling bearing can axially slide in the mounting cavity, a lead screw is penetratingly arranged in the rolling bearing, a disc spring is compressively arranged between the a certain axial end of the rolling bearing and the mounting cavity, the certain axial end of the rolling bearing is opposite to the lead screw, and a nut which is matched with the lead screw in a threaded manner is arranged at the other end of the rolling bearing, so that the rolling bearing can be locked in the mounting cavity by the aid of the nut. According to the scheme, the high-speed ball screw unit has the advantage of high and stable lead screw pre-tightening force.
Description
Technical field
The utility model relates to a kind of screw mandrel unit, is specifically related to a kind of high speed ball screw unit.
Background technology
Ball screw unit is in machining center, to take motor with private to be used in conjunction with, and workbench and main shaft part are carried out accurately having pushed the mechanism that part is processed.Its structure comprises bearing block, in bearing block, be provided with rolling bearing and the installation cavity for the axial slippage of rolling bearing, in rolling bearing, be equipped with synchronize with bearing inner race rotate screw mandrel, rolling bearing comprises inner ring, outer ring and ball, the relative screw axis of rolling bearing offsets and joins to the outer ring of one end and installation cavity, the inner ring of the other end forms pretightning force by the nut check arranging on screw mandrel until outer ring and inner ring produce trace skew, and pretightning force ensures still can accurately push miscellaneous part after screw mandrel high temperature extends.
Be accompanied by the lifting of the maximization of lathe size and the speed of leading screw operation, the load that the length of machine tool lead screw and spring bearing thereof bear has occurred non-linear than the relation with increase of row, traditional detection method is to assess leading screw design elongation and prestretching amount with 3 degrees Celsius of leading screw temperature rises, but actual measurement and operating condition show, leading screw is in the time that 20m/min moves, operation 10 minutes continuously, the temperature rise of leading screw touch scrolling portion has reached 5 degrees Celsius, screw mandrel elongation increases greatly, in order to solve above-mentioned situation, can only could increase pretightning force to the pressure of inner ring by increasing nut, and this pre-tension method causes the axial load of the required carrying of rolling bearing also greatly to increase, cause the life-span of rolling bearing sharply to shorten, invisible maintenance duration and number of times that just increases high speed ball screw unit.
Summary of the invention
The deficiency existing for prior art, the high speed ball screw unit that provides a kind of screw mandrel pretightning force large and stable is provided the purpose of this utility model.
For achieving the above object, the utility model provides following technical scheme: comprise bearing block, in described bearing block, be provided with rolling bearing and the installation cavity for the axial slippage of rolling bearing, in described rolling bearing, be equipped with screw mandrel, it is characterized in that: the relative screw axis of described rolling bearing to one end and installation cavity between be installed with disk spring, the nut that other end setting coordinates with wire rod thread lock onto rolling bearing in installation cavity.
By adopting technique scheme, adopt nut to push disk spring by rolling bearing and provide pretightning force for screw mandrel, disk spring by power source from rolling bearing interior shifting to rolling bearing outside, and disk spring is realized larger and stable pretightning force with lower prestretching variable quantity, reduce the axial load that rolling bearing carries, extend its service life, and variations in temperature almost do not affect on disk spring, be well suited for being applied in high speed ball screw unit.
The utility model is further set to: described rolling bearing comprises outer ring, inner ring and ball, the other end that described screw mandrel is positioned at the relative rolling bearing of nut is provided with and the inner ring spacing draw-in groove of joining that offsets, and described disk spring supports and is assigned in outer ring towards the end of rolling bearing.
By adopting technique scheme, because the relative displacement without by inner ring and outer ring just produces pretightning force, set up spacing draw-in groove and increase the relative screw mandrel installation of rolling bearing stability, disk spring is avoided, because inner ring rotation and disk spring friction produce extra damage and temperature, extending its service life to being assigned in outer ring towards the end of rolling bearing.
The utility model is further set to: between described outer ring and inner ring, be respectively arranged with sealing ring with respect to the axial two ends of rolling bearing.
By adopting technique scheme, arranging of sealing ring ensures that extraneous dust can not enter in rolling bearing, and the sealing that carries of machining center itself arranges the weights that increase more, avoids dust and other particles to enter, and ensures steady operation and the service life of ball.
Below in conjunction with the drawings and specific embodiments, the utility model is further described.
Brief description of the drawings
Fig. 1 is the structural representation of the utility model detailed description of the invention.
Detailed description of the invention
As shown in Figure 1, the utility model discloses a kind of high speed ball screw unit, comprise bearing block 1, in bearing block 1, be provided with rolling bearing 2 and the installation cavity 11 for rolling bearing 2 axial slips, in rolling bearing 2, be equipped with screw mandrel 3, between one end that the relative screw mandrel 3 of rolling bearing 2 is axial and installation cavity 11, be installed with disk spring 12, the nut 13 of other end setting and screw mandrel 3 threaded engagement lock onto rolling bearing 2 in installation cavity, adopt nut 13 to push disk spring 12 by rolling bearing 2 and provide pretightning force for screw mandrel 3, disk spring 12 by power source from rolling bearing 2 interior shiftings to rolling bearing 2 outsides, and disk spring 12 is realized larger and stable pretightning force with lower prestretching variable quantity, reduce the axial load that rolling bearing 2 carries, extend its service life, and variations in temperature does not almost affect disk spring 12, be well suited for being applied in high speed ball screw unit.
Rolling bearing 2 comprises outer ring 21, inner ring 22 and ball 23, the other end that screw mandrel 3 is positioned at nut 13 relative rolling bearings 2 is provided with and the inner ring 22 spacing draw-in groove 31 of joining that offsets, disk spring 12 supports and is assigned in outer ring 21 towards the end of rolling bearing 2, because the relative displacement without by inner ring 22 and outer ring 21 just produces pretightning force, setting up spacing draw-in groove 31 increases the relative screw mandrel 3 of rolling bearing 2 stability is installed, disk spring 12 is avoided producing extra damage and temperature because of inner ring 22 rotations and disk spring 13 frictions to being assigned in outer ring 21 towards the end of rolling bearing 2, extend its service life.
Between outer ring 21 and inner ring 22, be respectively arranged with sealing ring 24 with respect to the axial two ends of rolling bearing 2, arranging of sealing ring 24 ensures that extraneous dust can not enter in rolling bearing 2, the sealing carrying with machining center itself arranges the upper weight that increases more, avoid dust and other particles to enter, ensure steady operation and the service life of ball 23.
Claims (3)
1. a high speed ball screw unit, comprise bearing block, in described bearing block, be provided with rolling bearing and the installation cavity for the axial slippage of rolling bearing, in described rolling bearing, be equipped with screw mandrel, it is characterized in that: the relative screw axis of described rolling bearing to one end and installation cavity between be installed with disk spring, the nut that other end setting coordinates with wire rod thread lock onto rolling bearing in installation cavity.
2. high speed ball screw according to claim 1 unit, it is characterized in that: described rolling bearing comprises outer ring, inner ring and ball, the other end that described screw mandrel is positioned at the relative rolling bearing of nut is provided with and the inner ring spacing draw-in groove of joining that offsets, and described disk spring supports and is assigned in outer ring towards the end of rolling bearing.
3. high speed ball screw according to claim 2 unit, is characterized in that: between described outer ring and inner ring, be respectively arranged with sealing ring with respect to the axial two ends of rolling bearing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420108483.2U CN203726240U (en) | 2014-03-11 | 2014-03-11 | High-speed ball screw unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420108483.2U CN203726240U (en) | 2014-03-11 | 2014-03-11 | High-speed ball screw unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203726240U true CN203726240U (en) | 2014-07-23 |
Family
ID=51196348
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420108483.2U Expired - Fee Related CN203726240U (en) | 2014-03-11 | 2014-03-11 | High-speed ball screw unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203726240U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105479238A (en) * | 2016-01-18 | 2016-04-13 | 南通国盛机电集团有限公司 | Lead screw lock nut anti-loosen structure |
| CN105834815A (en) * | 2015-02-03 | 2016-08-10 | 株式会社捷太格特 | Feed apparatus and machine tool |
| CN106001636A (en) * | 2016-07-28 | 2016-10-12 | 深圳市创世纪机械有限公司 | Tailstock and numerical control machine tool |
-
2014
- 2014-03-11 CN CN201420108483.2U patent/CN203726240U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105834815A (en) * | 2015-02-03 | 2016-08-10 | 株式会社捷太格特 | Feed apparatus and machine tool |
| CN105834815B (en) * | 2015-02-03 | 2019-09-03 | 株式会社捷太格特 | Feed arrangement and lathe |
| CN105479238A (en) * | 2016-01-18 | 2016-04-13 | 南通国盛机电集团有限公司 | Lead screw lock nut anti-loosen structure |
| CN106001636A (en) * | 2016-07-28 | 2016-10-12 | 深圳市创世纪机械有限公司 | Tailstock and numerical control machine tool |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140723 Termination date: 20200311 |