CN105922049A - Ball screw prestretching mechanism and prestretching method thereof - Google Patents
Ball screw prestretching mechanism and prestretching method thereof Download PDFInfo
- Publication number
- CN105922049A CN105922049A CN201610538933.5A CN201610538933A CN105922049A CN 105922049 A CN105922049 A CN 105922049A CN 201610538933 A CN201610538933 A CN 201610538933A CN 105922049 A CN105922049 A CN 105922049A
- Authority
- CN
- China
- Prior art keywords
- rear end
- end bearing
- ball
- ball screw
- bearing
- 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.)
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q5/00—Driving or feeding mechanisms; Control arrangements therefor
- B23Q5/54—Arrangements or details not restricted to group B23Q5/02 or group B23Q5/22 respectively, e.g. control handles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
- B23Q11/0003—Arrangements for preventing undesired thermal effects on tools or parts of the machine
- B23Q11/0007—Arrangements for preventing undesired thermal effects on tools or parts of the machine by compensating occurring thermal dilations
Abstract
The invention discloses a ball screw prestretching mechanism and a prestretching method thereof. The ball screw prestretching mechanism comprises a ball screw pair, a front locking module and a back locking module, wherein the front end and the back end of the ball screw pair are respectively fixed by the front locking module and the back locking module; the back locking module includes a back end bearing, a back end bearing sleeve and a back end bearing base coating the ball screw pair in sequence from inside to outside; the back end bearing sleeve is coated with a stretching unit; the stretching nut is near the outer side of the back end bearing base; and a rotation preventing pin is inserted in the back end bearing base, and is butted against the outer surface of the back end bearing sleeve after penetrating through the back end bearing base. The ball screw prestretching mechanism can obtain the beneficial effect of preventing the blockage phenomenon of a ball screw by a bearing inner ring due to a bearing locking nut stretching the ball screw when locking a ball screw bearing.
Description
Technical field
The present invention relates to a kind of prestressing mechanism and prestretching thereof, pre-particularly to a kind of ball-screw
Drawing mechanism and prestretching thereof.
Background technology
Can generate heat during ball-screw work.Heating makes ball-screw thermal expansion, thus adds large pitch, impact
Transmission and positioning precision, to requiring the ball-screw of very precision drive, need to compensate thermal expansion, ball wire
Thick stick prestretched just makes the compensation method commonly used.
On machining center, the shortcoming of the ball-screw prestretched of kinematic axis is at present:
Owing to ball-screw bearing contact angle is the thrust contact ball bearing of 60 degree, in the effect of coupling mechanism force
Under by the contact angle of bearing then bearing produce radial force, radial force effect lower bearing outer ring produce
Deformation outward expansion, but bearing outer ring because of by bearing block containment surfaces cannot outward expansion, thus radial direction
Cause bearing inner race to contract under power effect, thus produce bearing inner race by ball-screw " locking "
Phenomenon, thus cannot stretch ball-screw again, often can not get the purpose of ball-screw prestretched.
Consequent consequence is:
1. because of in ball-screw operation process temperature raise thermal expansion cause precise decreasing problem；
2. prestretched can not get requirement ball-screw excessive to slenderness ratio because of the deadweight sagging and chatter of generation.
Summary of the invention
For weak point present in above-mentioned technology, it is an object of the invention to provide a kind of ball-screw pre-
Drawing mechanism and prestretching thereof, it is to avoid bearing lock nut comes while locking ball-screw bearing
Stretching the produced bearing inner race of ball-screw, by ball-screw " locking " phenomenon, really obtains ball-screw
The purpose of prestretched, solves ball-screw and causes because ball-screw temperature raises thermal expansion in operation process
Precise decreasing problem, alleviates the sagging and chatter produced at the excessive ball-screw of slenderness ratio because of deadweight.
In order to realize the above-mentioned purpose according to the present invention and other advantages, it is provided that a kind of ball-screw prestretching
Stretch mechanism, it is characterised in that including:
Ball screw assembly,；
It is sheathed on the front latch assembly of the front end of described ball screw assembly,；And
It is sheathed on the rear latch assembly of the rear end of described ball screw assembly,
Wherein, the front end of described ball screw assembly, and rear end are respectively by described front latch assembly and rear locking group
Part is fixed, after described rear latch assembly includes being sequentially sleeved at from inside to outside on described ball screw assembly,
End bearing, rear end bearing set and rear end bearing seat, described rear end bearing puts and is also arranged with stretching nut,
Described stretching nut is adjacent with the outside of described rear end bearing seat, penetratingly sets in described rear end bearing seat
There is stop pin, the outer surface phase that described stop pin overlaps after passing described rear end bearing seat with described rear end axle bed
Conflict.
Preferably, it is respectively equipped with rear end locking nut and rear end bearing inside and outside described rear end bearing
Locking nut, described rear end bearing is folded by inside and outside described rear end locking nut and rear end bearing locking nut
Thus lock.
Preferably, it is additionally provided with for interference between described rear end bearing locking nut and described rear end bearing
The rear end pad coordinated.
Preferably, described front latch assembly includes along the rear end of described ball screw assembly, to the extension of front end
Front end bearing, front end bearing gland and the shaft coupling that direction is the most sheathed, described front end bearing, front end
The outside of bearing gland and shaft coupling is also arranged with motor bearing seat, and described front end bearing gland is with described
Front end locking nut it is arranged with between ball screw assembly,.
Further, this case also provides for the prestretching of a kind of above-mentioned ball-screw prestressing mechanism, its
Comprise the following steps:
The first step: described front end bearing is loaded described motor bearing seat；
Second step: described front end bearing gland is sheathed on the locking nut of described front end；
3rd step: by described ball screw assembly, and described front end bearing fit, lock described front end locking screw
Mother, loads onto described shaft coupling；
4th step: described rear end locking nut is screwed on described ball screw assembly, and by described rear end axle
Take up in described rear end bearing set；
5th step: described rear end bearing set is loaded in described rear end bearing seat, stop pin of screwing on；
6th step: by the described rear end bearing seat assembled, stop pin, rear end bearing set, rear end bearing
Installing to coordinate with described rear end bearing on described ball screw assembly, described rear end pad on pad, after described
End bearing lock nut is tightened, described stretching nut of simultaneously screwing on.
Preferably, in the 6th step, described motor bearing seat is passed through with rear end bearing seat by described ball wire
Thick stick pair is fixed.
Preferably, according to the required prestretching elongation of described ball screw assembly, set in advance in the 6th step
Degree tightens the rotation pitch of described stretching nut, so that described rear end bearing set realizes axial displacement
Realize described ball screw assembly, and reach the displacement of prestretched.
Compared with prior art, it provides the benefit that the present invention:
1, avoid bearing lock nut to stretch ball-screw and produced while locking ball-screw bearing
Raw bearing inner race, by ball-screw " locking " phenomenon, really obtains the purpose of ball-screw prestretched, solves
Ball-screw of having determined causes precise decreasing problem because ball-screw temperature raises thermal expansion in operation process；
2, the sagging and chatter produced at the excessive ball-screw of slenderness ratio is alleviated because of deadweight；
3, the method using bearing holder (housing, cover) to carry out ball-screw prestretched, improves lathe each operating shaft precision long
Phase retentivity, improves functional reliability, gives full play to lathe high accuracy, response under quickly running fast etc.
Advantage.
Accompanying drawing explanation
Fig. 1 is according to the structural representation of ball-screw prestressing mechanism in an embodiment of the present invention
Figure.
Detailed description of the invention
The present invention is described in further detail below in conjunction with the accompanying drawings, the foregoing end other objects of the present invention,
Feature, aspect and advantage will be apparent from, to make those skilled in the art with reference to description word energy
Enough implement according to this.
With reference to Fig. 1, ball-screw prestressing mechanism 100 includes: rear latch assembly 110, ball screw assembly,
120 and front latch assembly 130, wherein, front latch assembly 130 and rear latch assembly 110 are the most sheathed
In front end and the rear end of ball screw assembly, 120, and the front end of ball screw assembly, 120 and rear end are respectively by front
Latch assembly 130 and rear latch assembly 110 are fixed, and rear latch assembly 110 includes the most successively
Rear end bearing 118, rear end bearing set 114 and the rear end bearing seat 112 being set on ball screw assembly, 120,
Stretching nut 111, stretching nut 111 and rear end bearing seat 112 also it is arranged with on rear end bearing set 114
Outside is adjacent, is penetratingly provided with stop pin 113 in rear end bearing seat 112, and stop pin 113 is through rear end
After bearing block 112 with rear end axle bed set 114 outer surface inconsistent.
In one embodiment, be respectively equipped with inside and outside rear end bearing 118 rear end locking nut 115 and
Rear end bearing locking nut 116, rear end bearing 118 is by rear end locking nut 115 and rear end bearing locking screw
Fold inside and outside female 116 thus lock.
In one embodiment, be additionally provided with between rear end bearing locking nut 116 and rear end bearing 118 for
The rear end pad 117 of interference fit.
Referring again to Fig. 1, front latch assembly 130 includes that the rear end along ball screw assembly, 120 is to front end
Front end bearing 131, front end bearing gland 132 and the shaft coupling 133 that bearing of trend is the most sheathed, and front
The outside of end bearing 131, front end bearing gland 132 and shaft coupling 133 is also arranged with motor bearing seat
134, it is arranged with front end locking nut 135 between front end bearing gland 132 and described ball screw assembly, 120.
The prestretching of described ball-screw prestressing mechanism comprises the following steps:
The first step: front end bearing 131 is loaded motor bearing seat 134；
Second step: front end bearing gland 132 is sheathed on front end locking nut 135；
3rd step: ball screw assembly, 120 is coordinated with front end bearing 131, locking front end locking nut 135,
Load onto shaft coupling 133；
4th step: rear end locking nut 115 is screwed on ball screw assembly, 120, and by rear end bearing 118
Load in rear end bearing set 114；
5th step: rear end bearing set 114 is loaded in rear end bearing seat 112, stop pin 113 of screwing on；
6th step: by the rear end bearing seat 112 assembled, stop pin 113, rear end bearing set 114, after
End bearing 118 installs to coordinate with rear end bearing 118 on ball screw assembly, 120, rear end pad 117 on pad,
Rear end bearing locking nut 116 is tightened, stretching nut 111 of simultaneously screwing on.
In one embodiment, will rolling with rear end bearing seat 112 by motor bearing seat 134 in the 6th step
Ballscrew secondary 120 is fixed.
In one embodiment, according to the required prestretching of ball screw assembly, 120 set in advance in the 6th step
Elongation tightens the rotation pitch of stretching nut 111, so that rear end bearing set 114 realization is axially
Displacement realizes ball screw assembly, 120 and reaches the displacement of prestretched.
Number of devices described herein and treatment scale are used to the explanation of the simplification present invention.To the present invention
Application, modifications and variations will be readily apparent to persons skilled in the art.
According to the present invention, as described above, it is possible to obtain following beneficial effect:
1, avoid bearing lock nut to stretch ball-screw and produced while locking ball-screw bearing
Raw bearing inner race, by ball-screw " locking " phenomenon, really obtains the purpose of ball-screw prestretched, solves
Ball-screw of having determined causes precise decreasing problem because ball-screw temperature raises thermal expansion in operation process；
2, the sagging and chatter produced at the excessive ball-screw of slenderness ratio is alleviated because of deadweight；
3, the method using bearing holder (housing, cover) to carry out ball-screw prestretched, improves lathe each operating shaft precision long
Phase retentivity, improves functional reliability, gives full play to lathe high accuracy, response under quickly running fast etc.
Advantage.
Although embodiment of the present invention are disclosed as above, but it is not limited in description and embodiment
Using listed by, it can be applied to various applicable the field of the invention completely, for being familiar with this area
Personnel for, be easily achieved other amendment, therefore without departing substantially from claim and equivalency range
Under the general concept limited, the present invention is not limited to specific details and shown here as the legend with description.
Claims (7)
1. a ball-screw prestressing mechanism, it is characterised in that including:
Ball screw assembly,；
It is sheathed on the front latch assembly of the front end of described ball screw assembly,；And
It is sheathed on the rear latch assembly of the rear end of described ball screw assembly,
Wherein, the front end of described ball screw assembly, and rear end are respectively by described front latch assembly and rear locking group
Part is fixed, after described rear latch assembly includes being sequentially sleeved at from inside to outside on described ball screw assembly,
End bearing, rear end bearing set and rear end bearing seat, described rear end bearing puts and is also arranged with stretching nut,
Described stretching nut is adjacent with the outside of described rear end bearing seat, penetratingly sets in described rear end bearing seat
There is stop pin, the outer surface phase that described stop pin overlaps after passing described rear end bearing seat with described rear end axle bed
Conflict.
2. ball-screw prestressing mechanism as claimed in claim 1, it is characterised in that described rear end axle
Be respectively equipped with rear end locking nut and rear end bearing locking nut inside and outside holding, described rear end bearing by
Fold inside and outside described rear end locking nut and rear end bearing locking nut thus lock.
3. ball-screw prestressing mechanism as claimed in claim 2, it is characterised in that described rear end axle
Hold and between locking nut and described rear end bearing, be additionally provided with the rear end pad for interference fit.
4. ball-screw prestressing mechanism as claimed in claim 3, it is characterised in that locking before described
Assembly include the front end bearing the most sheathed to the bearing of trend of front end along the rear end of described ball screw assembly,
Front end bearing gland and shaft coupling, described front end bearing, front end bearing gland and the outside of shaft coupling
Also it is arranged with motor bearing seat, between described front end bearing gland and described ball screw assembly, is arranged with front end
Locking nut.
5. a prestretching for ball-screw prestressing mechanism as claimed in claim 4, its feature
It is, comprises the following steps:
The first step: described front end bearing is loaded described motor bearing seat；
Second step: described front end bearing gland is sheathed on the locking nut of described front end；
3rd step: by described ball screw assembly, and described front end bearing fit, lock described front end locking screw
Mother, loads onto described shaft coupling；
4th step: described rear end locking nut is screwed on described ball screw assembly, and by described rear end axle
Take up in described rear end bearing set；
5th step: described rear end bearing set is loaded in described rear end bearing seat, stop pin of screwing on；
6th step: by the described rear end bearing seat assembled, stop pin, rear end bearing set, rear end bearing
Installing to coordinate with described rear end bearing on described ball screw assembly, described rear end pad on pad, after described
End bearing lock nut is tightened, described stretching nut of simultaneously screwing on.
6. the prestretching of ball-screw prestressing mechanism as claimed in claim 5, it is characterised in that
Described ball screw assembly, is fixed with rear end bearing seat by the 6th step by described motor bearing seat.
7. the prestretching of ball-screw prestressing mechanism as claimed in claim 6, it is characterised in that
In the 6th step according to the required pre-stretched length of described ball screw assembly, set in advance tighten described in draw
Stretch the rotation pitch of nut, so that described rear end bearing set realizes axial displacement to realize described ball
Lead screw pair reaches the displacement of prestretched.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610538933.5A CN105922049B (en) | 2016-07-08 | 2016-07-08 | Ball-screw prestressing mechanism and its prestretching |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610538933.5A CN105922049B (en) | 2016-07-08 | 2016-07-08 | Ball-screw prestressing mechanism and its prestretching |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105922049A true CN105922049A (en) | 2016-09-07 |
| CN105922049B CN105922049B (en) | 2018-11-30 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610538933.5A Active CN105922049B (en) | 2016-07-08 | 2016-07-08 | Ball-screw prestressing mechanism and its prestretching |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105922049B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109027163A (en) * | 2018-10-16 | 2018-12-18 | 广东隆禾机械实业有限公司 | A kind of convenient accurately screw rod mounting structure |
| CN109404423A (en) * | 2018-10-31 | 2019-03-01 | 东莞市巨冈机械工业有限公司 | A kind of high speed and super precision rotary screw fixed structure |
| CN114589319A (en) * | 2022-03-22 | 2022-06-07 | 安徽宇宙机床有限公司 | Small-size row-cutter type precise horizontal numerically controlled lathe |
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| CN204053617U (en) * | 2014-06-30 | 2014-12-31 | 东莞市乔锋机械有限公司 | A kind of vertical metal processing center machine of screw structure improvement |
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| CN105312951A (en) * | 2014-06-27 | 2016-02-10 | 芜湖陀曼精机科技有限公司 | Ball screw supporting device for numerical control machine tool |
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| CN205799060U (en) * | 2016-07-08 | 2016-12-14 | 江苏元利数控机床有限公司 | Ball-screw prestressing mechanism |
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| JPH0890379A (en) * | 1994-09-22 | 1996-04-09 | Makino Milling Mach Co Ltd | Feed screw mechanism |
| CN103072035A (en) * | 2013-01-24 | 2013-05-01 | 无锡市欧泰数控机床有限公司 | Pre-stretching locking mechanism for ball screw |
| CN203045400U (en) * | 2013-05-21 | 2013-07-10 | 宁波恒大机械有限公司 | Double-end fixing type ball screw pair |
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| CN204053617U (en) * | 2014-06-30 | 2014-12-31 | 东莞市乔锋机械有限公司 | A kind of vertical metal processing center machine of screw structure improvement |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109027163A (en) * | 2018-10-16 | 2018-12-18 | 广东隆禾机械实业有限公司 | A kind of convenient accurately screw rod mounting structure |
| CN109404423A (en) * | 2018-10-31 | 2019-03-01 | 东莞市巨冈机械工业有限公司 | A kind of high speed and super precision rotary screw fixed structure |
| CN114589319A (en) * | 2022-03-22 | 2022-06-07 | 安徽宇宙机床有限公司 | Small-size row-cutter type precise horizontal numerically controlled lathe |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105922049B (en) | 2018-11-30 |
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Effective date of registration: 20210514 Address after: 210000 building C17, No.9 Kechuang Avenue, Zhongshan Science Park, Liuhe District, Nanjing City, Jiangsu Province Patentee after: JIANGSU YUANLI AVIA PRECISION MACHINE TOOL Co.,Ltd. Address before: No. 1 Zidong Road, Qixia District, Nanjing City, Jiangsu Province, 210000 Patentee before: JIANGSU YUANLI NUMERICAL CONTROL MACHINE TOOL Co.,Ltd. |