CN203082148U - Ball screw assembly with double nuts with accurately adjustable pre-pressure - Google Patents
Ball screw assembly with double nuts with accurately adjustable pre-pressure Download PDFInfo
- Publication number
- CN203082148U CN203082148U CN 201320078864 CN201320078864U CN203082148U CN 203082148 U CN203082148 U CN 203082148U CN 201320078864 CN201320078864 CN 201320078864 CN 201320078864 U CN201320078864 U CN 201320078864U CN 203082148 U CN203082148 U CN 203082148U
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- Prior art keywords
- ball screw
- nut
- flange nut
- nuts
- pretension
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- Expired - Lifetime
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- 238000005096 rolling process Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000009347 mechanical transmission Effects 0.000 description 1
- 230000003252 repetitive effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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Abstract
The utility model discloses a ball screw assembly with double nuts with accurately adjustable pre-pressure, which is applied to numerically-controlled machine tools. The ball screw assembly comprises a ball screw, and a flange nut and a cylindrical nut which are sleeved on the ball screw from the left to the right in sequence, wherein a plurality of circles of thread rolling path grooves are formed in the outer side of the ball screw and inner sides of the two nuts; two pre-tightening grooves axially extending are symmetrically formed at 180 degrees in the wall surface on the near inner side at the right end of the flange nut; a horizontal pre-tightening pin is installed in each groove; screw holes which are communicated with the pre-tightening grooves and internally provided with pre-tightening screws are respectively formed in two ends of the wall surface, being perpendicular to the pre-tightening grooves in an aligning way, on the outer side of the flange nut; screw holes, in which a plurality of locking jackscrews are installed, are formed at equal intervals in the outer circumferential wall of the flange nut on the left side of a joint between the two nuts; and a 45-degree inclined plane is machined in a corresponding position of the cylindrical nut on the right side. The ball screw assembly has a reasonable structure and reliable performances, and can realize the accurate adjustability of the pre-pressure of the double nuts, thereby being convenient to install.
Description
Technical field
The utility model belongs to the mechanical transmission component technical field, relates to a kind of accurate adjustable ball screw pair of double nut precompression that is used for numerical control machine tool.
Background technique
Ball screw pair be in the present gearing precision the highest also be the most frequently used transmission device, generally be used for numerical control machine tool.For Location accuracy and the repetitive positioning accuracy that improves numerical control machine tool, require ball screw pair that backlass can not be arranged, eliminate backlass, common practice is to adopt the method for double nut precompressed to solve this problem.The mode of nut precompressed in the past adopts pad to add the firmly beforehand means of flat key usually, the thickness of match grinding pad is adjusted the precompression between the double nut during assembling, but because several microns of pad thickness all have very big influence to the precompression between the double nut, assemble more difficultly, be difficult to accomplish the accurately adjustable of precompression; In addition, after leading screw uses a period of time to produce wearing and tearing, also can occur between two nuts becoming flexible.
The model utility content
The purpose of this utility model is the problem that prior art exists is solved, and a kind of rational in infrastructure, reliable performance is provided and can makes to install and keep in repair accurately adjustable ball screw pair of convenient double nut precompression.
The technical solution that adopts is so for achieving the above object: what provided comprises a ball screw and suit flange nut and a cylindrical nut successively from left to right on ball screw, be provided with multi-turn screw thread raceway groove in the outside of ball screw and the inboard of two nuts, it is characterized in that having two pretension grooves that put in vertically by 180 degree symmetries in the nearly interior sidewall surface of flange nut right-hand member, respectively being incorporated with one in groove puts down to the pretension pin, respectively have the screw that with pretension with groove communicate perpendicular to pretension with the two ends of groove in the contraposition of flange nut outer side surface, a pretension screw all is housed in each screw, have at the first-class interval of outer circle wall of the left side, two nut junctions flange nut a plurality of Built-in locks press closer the silk the silk hole, on the right the corresponding position of cylindrical nut be processed with 45 the degree inclined-planes.
Working principle of the present utility model is: when two nuts after assembling on the ball screw, two the pretension screws of pretension groove both sides to the top are unclamped on one side, tight forward on one side, make the relative flange nut of cylindrical nut produce an angle displacement, thereby make between two nuts and produce precompressed, after required precompressed is adjusted, the opposite nut is fixed the pretension pin forward, and then the locking of each jackscrew on the flange excircle held out against, two nut junction planes are compressed, unlikely disengagement even if leading screw produces wearing and tearing afterwards, can not become flexible between two nuts yet.So promptly realized the accurately adjustable of double nut precompression, made easier for installation.In addition, after the user uses a period of time, produced backlass, also can carry out the adjustment of precompression quickly and easily to it at the scene, eliminated backlass, repaired and needn't beam back producer as ball screw pair.
Description of drawings
Fig. 1 is the structural representation of a specific embodiment of the utility model.
Fig. 2 is the A-A sectional view of Fig. 1.
Fig. 3 is the B portion enlarged view of Fig. 1.
The title of each number designation in the accompanying drawing is respectively: the 1-ball screw, and the 2-flange nut, 3-pretension pin, 4-pretension screw, 5-locks jackscrew, 6-cylindrical nut, 7-pretension groove, 8-screw.
Embodiment
Below with reference to accompanying drawing the utility model content is described further, but actual fabrication structure of the present utility model is not limited in following embodiment.
Referring to accompanying drawing, double nut precompression described in the utility model accurately adjustable ball screw pair is made up of ball screw 1, flange nut 2, cylindrical nut 6 and ball steel ball (not drawing among the figure) and ball-returning device (not drawing among the figure) etc., and flange nut 2 and cylindrical nut 6 adjoin successively from left to right and be sleeved on the ball screw 1.Nearly interior sidewall surface at flange nut 2 right-hand members has two pretensions that put in vertically grooves 7 by 180 degree symmetries, respectively being incorporated with one in groove puts down to pretension pin 3, respectively have the screw 8 that with pretension with groove 7 communicate perpendicular to pretension with the two ends of groove 7 in flange nut 2 outer side surface contrapositions, a pretension screw 4 all is housed in each screw 8, have at the first-class interval of outer circle wall of the left side, two nut junctions flange nut 2 a plurality of Built-in locks press closer the silk 5 the silk hole, the corresponding position of cylindrical nut 6 on the right is processed with the inclined-planes that are used to make 45 degree that two nuts compress.The utility model has the advantages that and install and debug very convenient that realized the accurately adjustable of double nut precompression, later period maintenance is also very easy.
Claims (1)
1. the accurate adjustable ball screw pair of a double nut precompression, comprise a ball screw (1) and suit a flange nut (2) and a cylindrical nut (6) successively from left to right on ball screw (1), the outside and two nuts (2 at ball screw (1), 6) inboard is provided with multi-turn screw thread raceway groove, it is characterized in that: the nearly interior sidewall surface at flange nut (2) right-hand member has two pretensions that put in vertically grooves (7) by 180 degree symmetries, respectively being incorporated with one in groove puts down to pretension pin (3), respectively have the screw (8) that with pretension with groove (7) communicate perpendicular to pretension with the two ends of groove (7) in flange nut (2) outer side surface contraposition, a pretension screw (4) all is housed in each screw (8), have at the first-class interval of outer circle wall of two nut junctions left side flange nut (2) a plurality of Built-in locks press closer the silk (5) the silk hole, the corresponding position of cylindrical nut (6) is processed with 45 inclined-planes of spending on the right.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320078864 CN203082148U (en) | 2013-02-20 | 2013-02-20 | Ball screw assembly with double nuts with accurately adjustable pre-pressure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320078864 CN203082148U (en) | 2013-02-20 | 2013-02-20 | Ball screw assembly with double nuts with accurately adjustable pre-pressure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203082148U true CN203082148U (en) | 2013-07-24 |
Family
ID=48827989
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320078864 Expired - Lifetime CN203082148U (en) | 2013-02-20 | 2013-02-20 | Ball screw assembly with double nuts with accurately adjustable pre-pressure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203082148U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106402308A (en) * | 2016-11-02 | 2017-02-15 | 常州机电职业技术学院 | Double-nut pre-tightening ball screw pair |
| CN112079275A (en) * | 2020-09-30 | 2020-12-15 | 谢昭 | Multistage telescoping device |
-
2013
- 2013-02-20 CN CN 201320078864 patent/CN203082148U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106402308A (en) * | 2016-11-02 | 2017-02-15 | 常州机电职业技术学院 | Double-nut pre-tightening ball screw pair |
| CN112079275A (en) * | 2020-09-30 | 2020-12-15 | 谢昭 | Multistage telescoping device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: XI'AN HUAOU PRECISION MACHINERY CO., LTD. Free format text: FORMER OWNER: XI'AN FENGCHENG PRECISION MACHINERY CO., LTD. Effective date: 20150901 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20150901 Address after: 710018 Shaanxi city of Xi'an Province Economic and Technological Development Zone of Xi'an District West District Wenjing building second No. 12602 Patentee after: XI'AN HUA OU PRECISION MACHINERY Co.,Ltd. Address before: 710016 A2 District, twelve export processing zone, Fengcheng, Shaanxi, Xi'an Patentee before: XI'AN FENGCHENG PRECISION MACHINERY Co.,Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20130724 |
|
| CX01 | Expiry of patent term |