CN201900500U - Pretension device of large-size ball screw - Google Patents
Pretension device of large-size ball screw Download PDFInfo
- Publication number
- CN201900500U CN201900500U CN2010206631531U CN201020663153U CN201900500U CN 201900500 U CN201900500 U CN 201900500U CN 2010206631531 U CN2010206631531 U CN 2010206631531U CN 201020663153 U CN201020663153 U CN 201020663153U CN 201900500 U CN201900500 U CN 201900500U
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- Prior art keywords
- bearing
- hole
- screw
- ball screw
- ball
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- Expired - Fee Related
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Abstract
The utility model discloses a pretension device of a large-size ball screw, which comprises a support with a through-hole, a pretension nut with a through-hole, a locking nut with a through-hole, a ball screw body, a first bearing, a second bearing, a spacer, and an elastic member, wherein the first bearing and the second bearing are sleeved on the ball screw body, the two ends of the spacer are closely butted against the opposite surfaces of the first bearing and the second bearing and used for fixing a spacing between the first bearing and the second bearing, and the elastic member serves the pretension effect on the ball screw. The elastic member is compressed by the pretension nut and the locking nut, so as to apply a preset force in the axial direction of the ball screw; in case of the trend of length change of the ball screw due to the temperature change, the preset force applied by the elastic member can prevent the change in length of the ball screw, so as to ensure the precision of the ball screw and prevent the damage to the processing equipment due to the length change of the ball screw.
Description
Technical field
The utility model relates to a kind of pre-tightening apparatus of large-scale ball-screw.
Background technology
In process equipment, the application of large-scale ball-screw more and more widely, and process equipment when work, leading screw is in the motion, temperature can raise, after process equipment quits work, leading screw is static, and temperature can reduce, and the phenomenon of expanding with heat and contract with cold will certainly be brought the variation of ball-screw length, existing large-scale ball-screw, the length variable factor that can when design variations in temperature be caused is taken into account, and the leading screw body is done length, but makes troubles can for like this assembling and manufacturing, and can cause damage to equipment, influence machining accuracy.
Summary of the invention
The purpose of this utility model provide avoid leading screw because of variations in temperature bring length variations influence precision a kind of pre-tightening apparatus of large-scale ball-screw.
For achieving the above object, the technical solution adopted in the utility model is: a kind of pre-tightening apparatus of large-scale ball-screw, comprise bearing with through hole, pre-load nut with through hole, locking nut with through hole, the ball-screw body, be set in the clutch shaft bearing and second bearing on the described ball-screw body, two ends push against the spacer that described clutch shaft bearing and the described second bearing facing surfaces are used to locate spacing, can play the elastic component of pretension effect to described ball-screw, described bearing, described pre-load nut, has screw thread on the through-hole wall of described locking nut, described ball-screw is passed in described block hole, described pre-load nut through hole, in the described locking nut through hole, the side face contact of described bearing is on described bearing through-hole wall, described pre-load nut is by on the through-hole wall that is threaded in described bearing, described locking nut is threaded on the described pre-load nut side face by through-hole wall, described elastic component is arranged in described the block hole along the axial direction of described ball-screw, the described clutch shaft bearing of one end in contact, the other end contacts described pre-load nut.
Because the utilization of technique scheme, the utility model compared with prior art has following advantage: by elastic component large-scale ball-screw is applied the power of presetting, absorb the large-scale ball-screw length variations trend that variations in temperature causes by elastic component, made things convenient for assembling like this and made, avoided wandering away because of equipment damage and machining accuracy that large-scale ball-screw length variations causes.
Description of drawings
Accompanying drawing 1 is looked cutaway view for master of the present utility model.
The specific embodiment
Further set forth structure of the present utility model below in conjunction with accompanying drawing.
Referring to shown in Figure 1, bearing 7, pre-load nut 2, locking nut 3 has through hole, ball-screw 1 is passed in bearing 7, pre-load nut 2, in the through hole of locking nut 3, clutch shaft bearing 6, second bearing 8 is set on the ball-screw 1, spacer 5 two ends push against respectively at clutch shaft bearing 6, be used to locate spacing on second bearing, 8 facing surfaces, clutch shaft bearing 6, the side face of second bearing 8 contacts with bearing 7 through-hole walls, bearing 7, pre-load nut 2, has screw thread on the through-hole wall of locking nut 3, pre-load nut 2 is by on the through-hole wall that is threaded in bearing 7, locking nut 3 is threaded on pre-load nut 2 side faces by through-hole wall, elastic component 4 is arranged in the through hole of bearing 7 along the axial direction of ball-screw 1, one end in contact clutch shaft bearing 6, other end contact pre-load nut 2.
In Fig. 1; the value that the installation length that is shorter in length than regulation of ball-screw 1 body presets; after ball-screw 1 is in place; adjust pre-load nut 2; reach the power that presets; then elastic component 4 is compressed; produce axial force; clutch shaft bearing 6 stressed backs pass to second bearing 8 by spacer 5; last power is delivered to ball-screw 1; elongation met the requirements of installation length after ball-screw 1 was subjected to axially presetting the power effect; so promptly reached installation requirement; when equipment processing work; ball-screw 1 can raise owing to kinetic temperature; but the length elongation that ball-screw 1 length that heat expansion is brought elongation brings less than the power of presetting; so can the length of ball-screw 1 not impacted; process equipment work stops or operating ambient temperature is crossed when hanging down; the temperature of ball-screw 1 reduces; ball-screw 1 has the trend of shortening, and at this moment, the power of presetting that elastic component 4 applies can stop ball-screw 1 to shorten; guaranteed the precision of ball-screw 1; when variations in temperature is big,, effectively protected equipment by the length variations of elastic component 4 absorption ball-screws 1.
Claims (1)
1. the pre-tightening apparatus of a large-scale ball-screw, comprise bearing with through hole, pre-load nut with through hole, locking nut with through hole, the ball-screw body, be set in the clutch shaft bearing and second bearing on the described ball-screw body, two ends push against the spacer that described clutch shaft bearing and the described second bearing facing surfaces are used to locate spacing, can play the elastic component of pretension effect to described ball-screw, it is characterized in that: described bearing, described pre-load nut, has screw thread on the through-hole wall of described locking nut, described ball-screw is passed in described block hole, described pre-load nut through hole, in the described locking nut through hole, the side face contact of described bearing is on described bearing through-hole wall, described pre-load nut is by on the through-hole wall that is threaded in described bearing, described locking nut is threaded on the described pre-load nut side face by through-hole wall, described elastic component is arranged in described the block hole along the axial direction of described ball-screw, the described clutch shaft bearing of one end in contact, the other end contacts described pre-load nut.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206631531U CN201900500U (en) | 2010-12-16 | 2010-12-16 | Pretension device of large-size ball screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206631531U CN201900500U (en) | 2010-12-16 | 2010-12-16 | Pretension device of large-size ball screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201900500U true CN201900500U (en) | 2011-07-20 |
Family
ID=44271103
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206631531U Expired - Fee Related CN201900500U (en) | 2010-12-16 | 2010-12-16 | Pretension device of large-size ball screw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201900500U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103008773A (en) * | 2012-12-10 | 2013-04-03 | 天水锻压机床(集团)有限公司 | Nut rotating ball screw pair transmission unit |
| CN108266458A (en) * | 2017-12-12 | 2018-07-10 | 北京卫星制造厂 | A kind of width temperature range angular contact shafting |
-
2010
- 2010-12-16 CN CN2010206631531U patent/CN201900500U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103008773A (en) * | 2012-12-10 | 2013-04-03 | 天水锻压机床(集团)有限公司 | Nut rotating ball screw pair transmission unit |
| CN108266458A (en) * | 2017-12-12 | 2018-07-10 | 北京卫星制造厂 | A kind of width temperature range angular contact shafting |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110720 Termination date: 20131216 |