CN103256360A - Single-nut gap eliminating mechanism - Google Patents
Single-nut gap eliminating mechanism Download PDFInfo
- Publication number
- CN103256360A CN103256360A CN2013101989647A CN201310198964A CN103256360A CN 103256360 A CN103256360 A CN 103256360A CN 2013101989647 A CN2013101989647 A CN 2013101989647A CN 201310198964 A CN201310198964 A CN 201310198964A CN 103256360 A CN103256360 A CN 103256360A
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- China
- Prior art keywords
- nut
- thread
- endoporus
- trim ring
- screw
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- 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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Abstract
Provided is a single-nut gap eliminating mechanism. The single-nut gap eliminating mechanism comprises a nut, a pressing ring, a lead screw and an installing base, wherein ring-shaped grooves are formed in the nut in a cut mode so that the nut can become an elastic piece, and the pressing ring compresses the nut to eliminate gaps between threads and the lead screw. The pressing ring is used for compressing the nut to eliminate the gaps between the threads and the lead screw, and the single-nut gap eliminating mechanism has the advantages of being simple in structure and high in rigidity.
Description
Technical field
The present invention relates to the single nut anti-backlash mechanism, particularly a kind of single nut anti-backlash mechanism that is elastic component itself;
Background technique
In various motions, the gap of screw mandrel and nut has a strong impact on kinematic accuracy in the driving mechanism; General screw thread anti-backlash mechanism has two nuts and independent elastic element; The rigidity of elastic element has determined the rigidity of driving mechanism.
Summary of the invention
The invention provides a kind of single nut anti-backlash mechanism, purpose is to overcome the complexity of prior art, provides a kind of needs a nut, and nut itself also is elastic element, the screw thread anti-backlash mechanism that rigidity is big.
Technical solution of the present invention is as follows:
A kind of single nut anti-backlash mechanism, characteristics are that its formation comprises nut, trim ring, screw mandrel and fitting seat, described nut comprises first thread section, intermediate section and second thread section, intermediate section is provided with the above circular groove greater than semicircle of bar vertically, there is not screw thread between the circular groove, the internal thread of described first thread section and second thread section and the outside thread of described screw rod are complementary, described fitting seat is provided with endoporus and tapped hole coaxial and that communicate, be the not-go-end of described endoporus successively, first guide surface, median surface, second guide surface and tapped hole, the internal diameter of described not-go-end is greater than the external diameter of described screw mandrel, the internal diameter of described first guide surface and second guide surface is identical with the external diameter of described nut, the internal diameter of described median surface is greater than the external diameter of described nut, the outside thread of described tapped hole and described trim ring is complementary, and forms screw pair; Described nut is installed in the endoporus of described fitting seat, and the circular groove of described nut is corresponding with the median surface of described endoporus, and described screw rod passes from the endoporus of described trim ring and described nut, and described screw rod and nut are formed screw pair; Rotate described trim ring along the described nut of described screw compression, eliminate the gap.
Described trim ring has into a pair of breach and a pair of blind hole that "+" shape distributes.
Technique effect of the present invention:
Nut of the present invention has cut circular groove, makes nut become an elastic component, utilizes the gap between trim ring compression nut elimination screw thread and screw mandrel; The present invention has simple in structure, the characteristics that rigidity is big.
Description of drawings
Fig. 1 is the sectional view of single nut anti-backlash mechanism of the present invention;
Fig. 2 is single nut anti-backlash mechanism profile stereogram of the present invention;
Fig. 3 is for axially there being the stereogram of the nut of two annular grooves;
Fig. 4 is for axially there being the sectional view of the nut of two annular grooves;
Fig. 5 is the sectional view of fitting seat;
Fig. 6 is the stereogram of trim ring
Fig. 7 is for axially there being the nut of three annular grooves;
Embodiment
The present invention is further described below in conjunction with drawings and Examples, but not as a limitation of the invention.
Embodiment 1: as shown in Figure 1, and simultaneously referring to Fig. 2,3,4,5,6, as seen from the figure, single nut anti-backlash mechanism of the present invention, formation comprises nut 1, trim ring 2, screw mandrel 3 and fitting seat 4; Described nut 1 comprises first thread section 6, intermediate section and second thread section 7, intermediate section is provided with 2 vertically greater than the circular groove 8 of semicircle, there is not screw thread between the circular groove 8, the internal thread of described first thread section 6 and second thread section 7 and the outside thread of described screw rod 3 are complementary, described fitting seat 4 is provided with endoporus 12 and tapped hole 16 coaxial and that communicate, be the not-go-end 11 of described endoporus 12 successively, first guide surface 13, median surface 14, second guide surface 15 and tapped hole 16, the internal diameter of described not-go-end 11 is greater than described screw mandrel 3 external diameters, the internal diameter of described first guide surface 13 and second guide surface 15 is identical with the external diameter of described nut 1, the internal diameter of described median surface 14 is greater than the external diameter of described nut 1, described tapped hole 16 is complementary with the outside thread 17 of described trim ring 2, forms screw pair; Described nut 1 is installed in the endoporus 12 of described fitting seat 4, the circular groove 8 of described nut 1 is corresponding with the median surface 14 of described endoporus 12, described screw rod 3 passes from the endoporus 10 of described trim ring 2 and described nut 1, and described screw rod 3 and nut 1 are formed screw pair; Rotate described trim ring 2 along the described nut 1 of described screw rod 3 compressions, eliminate the gap.
Described trim ring 2 has into a pair of breach 19 and a pair of blind hole 18 that "+" shape distributes.
The nut 1 of present embodiment is installed in the fitting seat endoporus 12, and first guide surface 13 and second guide surface 15 cooperate the direction that constitutes nut 1 compressed movement, not-go-end 11 setscrew nuts 1 with the periphery 20 of nut 1; In the trim ring 2 precession fitting seats 4, trim ring 2 compression nuts 1, because nut 1 has circular groove 8, impacting force makes 7 displacements of second thread section, thereby first thread section 6 of nut 1 is closely contacted with the outside thread 5 of screw mandrel 3 with second thread section 7, eliminated outside thread 5 and first thread section 6 of nut 1 and the gap between second thread section 7 of screw mandrel 3;
Embodiment 2: as shown in Figure 7, nut 1 has axially cut three circular grooves 8, in circumferential symmetrical distribution, can control nut 1 axial elasticity and rigidity like this; Other are identical with specific embodiment 1.
Experiment shows that nut of the present invention has cut circular groove, makes nut become an elastic component, utilizes the gap between trim ring compression nut elimination screw thread and screw mandrel; The present invention has simple in structure, the characteristics that rigidity is big.
Claims (2)
1. a single nut anti-backlash mechanism is characterised in that its formation comprises nut (1), trim ring (2), screw mandrel (3) and fitting seat (4); Described nut (1) comprises first thread section (6), intermediate section and second thread section (7), intermediate section is provided with the circular groove greater than semicircle (8) more than 2 vertically, circular groove does not have screw thread between (8), the outside thread of the internal thread of described first thread section (6) and second thread section (7) and described screw rod (3) is complementary, described fitting seat (4) is provided with endoporus (12) and tapped hole (16) coaxial and that communicate, be the not-go-end (11) of described endoporus (12) successively, first guide surface (13), median surface (14), second guide surface (15) and tapped hole (16), the internal diameter of described not-go-end (11) is greater than described screw mandrel (3) external diameter, the internal diameter of described first guide surface (13) and second guide surface (15) is identical with the external diameter of described nut (1), the internal diameter of described median surface (14) is greater than the external diameter of described nut (1), described tapped hole (16) is complementary with the outside thread (17) of described trim ring (2), forms screw pair; Described nut (1) is installed in the endoporus (12) of described fitting seat (4), the circular groove (8) of described nut (1) is corresponding with the median surface (14) of described endoporus (12), described screw rod (3) passes from the endoporus (10) of described trim ring (2) and described nut (1), and described screw rod (3) and nut (1) are formed screw pair; Rotate described trim ring (2) and compress described nut (1) along described screw rod (3), eliminate the gap.
2. single nut anti-backlash mechanism according to claim 1 is characterized in that: described trim ring (2) has into a pair of breach (19) and a pair of blind hole (18) that "+" shape distributes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101989647A CN103256360A (en) | 2013-05-24 | 2013-05-24 | Single-nut gap eliminating mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101989647A CN103256360A (en) | 2013-05-24 | 2013-05-24 | Single-nut gap eliminating mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103256360A true CN103256360A (en) | 2013-08-21 |
Family
ID=48960482
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013101989647A Pending CN103256360A (en) | 2013-05-24 | 2013-05-24 | Single-nut gap eliminating mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103256360A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108761704A (en) * | 2018-05-23 | 2018-11-06 | 中国科学院上海光学精密机械研究所 | A kind of two-plate angular adjustment frame |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2643845A (en) * | 1947-07-28 | 1953-06-30 | Keuffel & Esser Co | Adjustable leveling screw |
| US3720116A (en) * | 1971-03-23 | 1973-03-13 | Bendix Corp | Arrangement for preloading ball screw assemblies & method of manufacture of the ball screw nut therefor |
| US3831460A (en) * | 1973-08-20 | 1974-08-27 | F Linley | Anti-backlash nut |
| CN2916268Y (en) * | 2006-07-12 | 2007-06-27 | 王凯 | Nut with adjustable screw thread clearance |
| CN201507626U (en) * | 2009-09-11 | 2010-06-16 | 海顿直线电机(常州)有限公司 | Non-elastic black-lash nut assembly |
-
2013
- 2013-05-24 CN CN2013101989647A patent/CN103256360A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2643845A (en) * | 1947-07-28 | 1953-06-30 | Keuffel & Esser Co | Adjustable leveling screw |
| US3720116A (en) * | 1971-03-23 | 1973-03-13 | Bendix Corp | Arrangement for preloading ball screw assemblies & method of manufacture of the ball screw nut therefor |
| US3831460A (en) * | 1973-08-20 | 1974-08-27 | F Linley | Anti-backlash nut |
| CN2916268Y (en) * | 2006-07-12 | 2007-06-27 | 王凯 | Nut with adjustable screw thread clearance |
| CN201507626U (en) * | 2009-09-11 | 2010-06-16 | 海顿直线电机(常州)有限公司 | Non-elastic black-lash nut assembly |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108761704A (en) * | 2018-05-23 | 2018-11-06 | 中国科学院上海光学精密机械研究所 | A kind of two-plate angular adjustment frame |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130821 |