CN204504848U - High-precision numerical control machine feeding transmission system ball-screw pre-tightening mechanism - Google Patents
High-precision numerical control machine feeding transmission system ball-screw pre-tightening mechanism Download PDFInfo
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- CN204504848U CN204504848U CN201520084427.4U CN201520084427U CN204504848U CN 204504848 U CN204504848 U CN 204504848U CN 201520084427 U CN201520084427 U CN 201520084427U CN 204504848 U CN204504848 U CN 204504848U
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- screw
- ball
- afterbody
- granite base
- control machine
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Abstract
High-precision numerical control machine feeding transmission system ball-screw pre-tightening mechanism, effectively to improve with granite base rigidity and the transmission accuracy of the ball screw assembly, being support.Comprise ball-screw and afterbody granite base and anterior granite base.The afterbody axle journal of described ball-screw fixedly mounts end face bearing, self-aligning bearing, and self-aligning bearing is connected by excessively coordinating to be formed with the installing hole of afterbody granite base; The pretension cylinder that the afterbody of described ball-screw is installed on it with nut and large washer, pretension cylinder is set with disk spring outward, the two ends of this disk spring act in large washer, afterbody granite base respectively, and the sidewall of the radial convex loop of pretension cylinder inner end is acted on the inner face of end face bearing vertically.
Description
Technical field
The utility model relates to high-precision numerical control machine feeding transmission system, particularly a kind of high-precision numerical control machine feeding transmission system ball-screw pre-tightening mechanism.
Background technology
Ball-screw is the basic transmission device of Digit Control Machine Tool feeding transmission system, and its gap will directly affect the machining accuracy of Digit Control Machine Tool.For this reason, should manage to be eliminated or reduce as far as possible.In Digit Control Machine Tool assembling, pretightning force technology is extensively adopted to eliminate the gap of ball screw assembly.After ball screw assembly, preload, nut can make ball press to leading screw all the time forward and reverse, thus the axial gap eliminated between leading screw and nut and backlass, improve rigidity and the positioning precision of ball screw assembly.
Adopt the lead screw transmission equipment of pig machine base, when needing leading screw pretension, generally all direct screw thread stretches pretension.But for high-precision numerical control machine, adopt granite base, when needing ball-screw pretension, then can not to stretch pretension by direct screw thread, because the linear expansion coefficient of metal balls leading screw is 0.000011 (l/ DEG C) left and right, the coefficient of expansion of granite base is 0.0000048 (l/ DEG C), and both differ more than one times.When environment for use temperature is different with debuging temperature, there will be pretightning force excessive or too little, affecting rigidity and the transmission accuracy of ball screw assembly,
Utility model content
Technical problem to be solved in the utility model is to provide a kind of high-precision numerical control machine feeding transmission system ball-screw pre-tightening mechanism, effectively to improve with granite base rigidity and the transmission accuracy of the ball screw assembly, being support.
It is as follows that the utility model solves the technical scheme that its technical problem adopts:
High-precision numerical control machine feeding transmission system ball-screw pre-tightening mechanism of the present utility model, comprise ball-screw and afterbody granite base and anterior granite base, it is characterized in that: the afterbody axle journal of described ball-screw fixedly mounts end face bearing, self-aligning bearing, self-aligning bearing is connected by excessively coordinating to be formed with the installing hole of afterbody granite base; The pretension cylinder that the afterbody of described ball-screw is installed on it with nut and large washer, pretension cylinder is set with disk spring outward, the two ends of this disk spring act in large washer, afterbody granite base respectively, and the sidewall of the radial convex loop of pretension cylinder inner end is acted on the inner face of end face bearing vertically.
The beneficial effects of the utility model are, act on afterbody granite base, the disk spring of pretension cylinder effectively can eliminate granite base, the different impact on pretightning force of the different linear expansion coefficient of ball-screw, improve rigidity and transmission accuracy that granite base is the ball screw assembly, supported.
Accompanying drawing explanation
This description comprises following width accompanying drawing:
Fig. 1 is the structural representation of the utility model high-precision numerical control machine feeding transmission system ball-screw pre-tightening mechanism;
Fig. 2 is the partial enlarged drawing of the utility model high-precision numerical control machine feeding transmission system ball-screw pre-tightening mechanism;
Component shown in figure and corresponding mark: afterbody granite base 10, anterior granite base 20, ball-screw 30, self-aligning bearing 31, end face bearing 32, pretension cylinder 33, nut 34, large washer 35, disk spring 36, axle sleeve 37, bearing box 38, cover plate 39.
Detailed description of the invention
Below in conjunction with drawings and Examples, the utility model is further illustrated.
See figures.1.and.2, high-precision numerical control machine feeding transmission system ball-screw pre-tightening mechanism of the present utility model, comprises ball-screw 30 and afterbody granite base 10 and anterior granite base 20.The afterbody axle journal of described ball-screw 30 fixedly mounts end face bearing 32, self-aligning bearing 31, self-aligning bearing 31 is connected by excessively coordinating to be formed with the installing hole of afterbody granite base 10.The pretension cylinder 33 that the afterbody of described ball-screw 30 is installed on it with nut 34 and large washer 35, pretension cylinder 33 outer suit disk spring 36, the two ends of this disk spring 36 act in large washer 35, afterbody granite base 10 respectively, and the sidewall of the radial convex loop 33a of pretension cylinder 33 inner end is acted on the inner face of end face bearing 32 vertically.Act on afterbody granite base 10, the disk spring 36 of pretension cylinder 33 effectively can eliminate granite base, the different impact on pretightning force of the different linear expansion coefficient of ball-screw, improve rigidity and transmission accuracy that granite base is the ball screw assembly, supported.
With reference to Fig. 2, between the end face that described end face bearing 32, self-aligning bearing 31 are relative, axle sleeve 37 is set on ball-screw 30.The front portion of ball-screw 30 is arranged in anterior granite base 20 by bearing box 38 usually, and the cover plate 39 removably connected with bearing box 38 holds out against the outer face of this side bearing.
Some principles of the above the utility model high-precision numerical control machine feeding transmission system ball-screw pre-tightening mechanism that just explains through diagrams, be not the utility model to be confined to shown in and in described concrete structure and the scope of application, therefore every corresponding modify of being likely utilized and equivalent, all belong to the scope of the claims that the utility model is applied for.
Claims (2)
1. high-precision numerical control machine feeding transmission system ball-screw pre-tightening mechanism, comprise ball-screw (30) and afterbody granite base (10) and anterior granite base (20), it is characterized in that: the afterbody axle journal of described ball-screw (30) fixedly mounts end face bearing (32), self-aligning bearing (31), self-aligning bearing (31) is connected by excessively coordinating to be formed with the installing hole of afterbody granite base (10); The pretension cylinder (33) that the afterbody of described ball-screw (30) is installed on it with nut (34) and large washer (35), pretension cylinder (33) is set with disk spring (36) outward, the two ends of this disk spring (36) act in large washer (35), afterbody granite base (10) respectively, and the sidewall of the radial convex loop (33a) of pretension cylinder (33) inner end is acted on the inner face of end face bearing (32) vertically.
2. high-precision numerical control machine feeding transmission system ball-screw pre-tightening mechanism as claimed in claim 1, is characterized in that: on ball-screw (30), arrange axle sleeve (37) between the end face that described end face bearing (32), self-aligning bearing (31) are relative.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520084427.4U CN204504848U (en) | 2015-02-06 | 2015-02-06 | High-precision numerical control machine feeding transmission system ball-screw pre-tightening mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520084427.4U CN204504848U (en) | 2015-02-06 | 2015-02-06 | High-precision numerical control machine feeding transmission system ball-screw pre-tightening mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204504848U true CN204504848U (en) | 2015-07-29 |
Family
ID=53702853
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520084427.4U Expired - Fee Related CN204504848U (en) | 2015-02-06 | 2015-02-06 | High-precision numerical control machine feeding transmission system ball-screw pre-tightening mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204504848U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111720510A (en) * | 2020-05-22 | 2020-09-29 | 福建省黑石精密机械有限公司 | High-precision movement shaft of machine tool and working method |
-
2015
- 2015-02-06 CN CN201520084427.4U patent/CN204504848U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111720510A (en) * | 2020-05-22 | 2020-09-29 | 福建省黑石精密机械有限公司 | High-precision movement shaft of machine tool and working method |
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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 |
Granted publication date: 20150729 Termination date: 20200206 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |