CN113531073B - Fine tuning screw rod assembly with high guidance - Google Patents
Fine tuning screw rod assembly with high guidance Download PDFInfo
- Publication number
- CN113531073B CN113531073B CN202010304665.7A CN202010304665A CN113531073B CN 113531073 B CN113531073 B CN 113531073B CN 202010304665 A CN202010304665 A CN 202010304665A CN 113531073 B CN113531073 B CN 113531073B
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- Prior art keywords
- screw rod
- hole
- nut sleeve
- handle
- precise
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- 230000007935 neutral effect Effects 0.000 claims description 6
- 230000005540 biological transmission Effects 0.000 abstract description 13
- 238000006073 displacement reaction Methods 0.000 abstract description 9
- 238000012545 processing Methods 0.000 description 4
- 238000013459 approach Methods 0.000 description 2
- 239000004519 grease Substances 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 230000013011 mating Effects 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
- F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
- F16H25/20—Screw mechanisms
- F16H25/24—Elements essential to such mechanisms, e.g. screws, nuts
Abstract
A fine tuning screw rod assembly with high guidance performance comprises a nut sleeve, a screw rod and a handle. The invention has the characteristics of precise linear displacement transmission, good guidance quality and stable and reliable adjustment, and can be used as a transmission screw rod for precise micro-angle adjustment with high requirements on various guidance precision.
Description
Technical Field
The invention relates to a fine tuning screw rod assembly, in particular to a fine tuning screw rod assembly with high guidance, which is mainly used for transmission screw rods for various precise micro-angle adjustment.
Background
The conventional fine-tuning screw rod assembly realizes linear micro-displacement transmission through the threaded fit of the screw rod and the nut sleeve, wherein the cylindrical surface of the screw rod is fully provided with external threads, and the guide and the driving are integrated. Because of the processing errors of the triangular threaded hole surface and the shaft surface used for driving, larger radial gaps exist in the matched threads, and a small inclination angle is generated between the transmission screw rod and the nut sleeve, so that the linear guidance quality is deteriorated. To improve radial clearance errors, it is conventional practice to add grease or valuable powder material to the thread mating surfaces or to machine a more precise thread fit. The former approach does not improve the radial clearance essentially, and as the number of times of use increases, the distribution state of the lubricating grease or the organic powder filled between the thread mating surfaces changes and even flows out of the thread surfaces, so that the clearance becomes larger; the latter approach results in increased processing costs and processing requirements.
Disclosure of Invention
The invention aims to provide a fine adjustment screw rod assembly with high guidance, which has the characteristics of precise linear displacement transmission, good guidance and stable and reliable adjustment, and can be used as a transmission screw rod for precise micro-angle adjustment with high requirements on various guidance precision.
The technical scheme of the invention is as follows:
the fine-tuning screw rod assembly with high guidance is characterized by comprising a nut sleeve, a screw rod and a handle;
the nut sleeve is a cylindrical step cylinder, the left outer wall surface is a cylindrical surface, the right end surface is a short step, and three sections of the inside of the cylinder are formed: the left section is a precise guide hole, the middle section is a neutral groove for leaving the excircle of the screw rod thread, the right section is an internal threaded hole, and the diameter of the precise guide hole is smaller than that of the internal threaded hole;
the screw rod is a stepped cylindrical rod, the left end of the screw rod is provided with an inner hexagonal groove, the right end of the screw rod is provided with a spherical tip, and the screw rod is divided into three sections: the left cylinder is a precise guide shaft, is in precise sliding fit with the precise guide hole of the nut sleeve, the middle cylindrical surface is a tool withdrawal groove, and the right cylinder is an external thread and is matched with the internal thread of the nut sleeve;
the handle is a cylinder, the inner wall of the handle is a unthreaded hole and is in interference fit with the guide shaft of the screw rod, and the bottom of the handle is provided with a central countersunk hole;
the precise guide shaft of the screw rod sequentially penetrates through the internal thread, the neutral groove and the precise guide hole of the nut sleeve and is arranged in the cylinder of the nut sleeve, the precise guide shaft of the screw rod is in precise sliding fit with the precise guide hole of the nut sleeve, the external thread of the screw rod is in threaded fit with the internal thread of the nut sleeve, the spherical tip of the screw rod is used for point contact with a driven piece, the left end of the guide shaft of the screw rod abuts against the bottom of the inner wall unthreaded hole of the handle and is in interference fit with the inner wall unthreaded hole of the handle, and the inner hexagonal groove at the left end of the guide shaft is positioned in the central countersunk hole at the bottom of the handle.
The adjusting process of the invention comprises the following steps:
firstly, screwing the external screw thread on the right side of the screw rod into the internal screw thread of the nut sleeve, and carrying out sliding fit on a guide shaft on the left side of the screw rod and a guide hole on the left side of the nut sleeve, wherein the guide shaft end of the screw rod is in interference fit with a unthreaded hole on the inner wall of the handle and is abutted against the bottom of the unthreaded hole, the handle is continuously turned until the spherical tip point of the screw rod contacts a driven piece, and the precise guide micro linear displacement driving of the ball head tip is realized through the left and right knob screw rod handles, or an inner hexagonal screwdriver is directly utilized to insert an inner hexagonal groove on the left end face of the screw rod through a countersunk hole on the bottom of the handle to realize a knob.
The invention has the technical effects that:
the precise matching guide surface and the matching thread surface are respectively machined on the left side and the right side of the outer cylindrical surface of the screw rod and the left side and the right side of the inner cylindrical surface of the nut sleeve, the guide and transmission functions of the original screw rod and the nut sleeve matched thread pair are decoupled, the precise sliding fit which independently plays a guide role is added, the influence of a larger radial gap in the original thread fit on the guide precision is eliminated, the precise machining matching is carried out on the precise guide hole surface of the nut sleeve and the precise guide shaft surface of the screw rod, and the radial thread matching gap of tens of microns or even hundreds of microns can be reduced to be within the level of microns by the existing machining level, so that the precise guide micro linear displacement driving is realized. The screw rod assembly has precise linear displacement guiding and stable and reliable adjustment, and can be used as a transmission screw rod for various precise micro-angle adjustment.
Drawings
FIG. 1 is an assembled cross-sectional view of a highly directional fine tuning screw assembly of the present invention
FIG. 2 is a cross-sectional view of a nut housing of a highly directional fine tuning screw assembly of the present invention
FIG. 3 is an external view of a lead screw of the highly directional fine tuning lead screw assembly of the present invention
FIG. 4 is a handle view of the highly directional fine tuning screw assembly of the present invention
Detailed Description
The invention is further illustrated in the following figures and examples, which should not be construed as limiting the scope of the invention.
Referring to fig. 1 to 4, it can be seen that the fine tuning screw assembly with high guidance according to the present invention is characterized by comprising a nut sleeve 1, a screw 2 and a handle 3;
the nut sleeve 1 is a cylindrical step cylinder, the left outer wall surface is a cylindrical surface 5, the right end surface is a short step 6, and the inside of the cylinder is divided into three sections: the left section is a precise guide hole 9, the middle section is a neutral groove 8 for leaving the thread excircle of the screw rod 2, the right section is an internal threaded hole 7, and the diameter of the precise guide hole 9 is smaller than that of the internal threaded hole 7;
the screw rod 2 is a stepped cylindrical rod, the left end of the screw rod is provided with an inner hexagonal groove 14, the right end of the screw rod is provided with a spherical tip 13, and the screw rod 2 is divided into three sections: the left cylinder is a precise guide shaft 10 which is in precise sliding fit with a precise guide hole 9 of the nut sleeve 1, the middle cylindrical surface is a tool withdrawal groove 11, and the right cylinder is an external thread 12 which is matched with an internal thread 7 of the nut sleeve 1;
the handle 3 is a cylinder, the inner wall of the handle is a unthreaded hole 15 and is in interference fit with the guide shaft 10 of the screw rod 2, and a central counter bore 16 is formed in the bottom of the handle 3;
the precise guide shaft 10 of the screw rod 2 sequentially penetrates through the internal thread 7, the neutral groove 8 and the precise guide hole 9 of the nut sleeve 1 and is arranged in the cylinder of the nut sleeve 1, the precise guide shaft 10 of the screw rod 2 is in precise sliding fit with the precise guide hole 9 of the nut sleeve 1, the external thread 12 of the screw rod 2 is in threaded fit with the internal thread 7 of the nut sleeve 1, the spherical tip 13 of the screw rod 2 is used for point contact with a driven piece, the left end of the guide shaft 10 of the screw rod 2 abuts against the bottom of the inner wall unthreaded hole 15 of the handle 3 and is in interference fit with the inner wall unthreaded hole 15 of the handle 3, and the inner hexagonal groove 14 at the left end of the guide shaft 10 is positioned in the central countersunk hole 16 at the bottom of the handle 3.
Firstly, the external thread 12 on the right side of the screw rod 2 is screwed into the internal thread 7 of the nut sleeve 1, the guide shaft 10 on the left side of the screw rod 2 is in sliding fit with the guide hole 9 on the left side of the nut sleeve 1, the free end of the guide shaft 10 of the screw rod 2 is in interference fit with the unthreaded hole 15 on the inner wall of the handle 3 and is abutted against the bottom of the unthreaded hole 15, the handle 3 is continuously rotated until the spherical tip 13 of the screw rod 2 is in point contact with a driven piece, and the precise guide micro linear displacement driving of the spherical tip 13 is realized through the left knob handle 3 and the knob is directly realized by inserting an inner hexagonal screwdriver into the inner hexagonal groove end 14 on the left side end face of the screw rod 2.
Experiments show that the invention decouples the coupled transmission and guide functions in the screw pair of the original screw rod and the nut sleeve, realizes transmission and guide by respectively carrying out screw fit and sliding fit on the screw surface and the guide surface which are simultaneously arranged on the cylindrical surface of the screw rod and the nut sleeve, ensures that the fit clearance of the guide surface reaches a deviation level of a few micrometers in the existing processing level, gets rid of the influence of larger radial clearance in the original screw fit on the guide precision, and ensures the precise transmission of the trace linear displacement of the guide.
The fine adjustment screw rod assembly with high guidance is precise in linear displacement guiding, stable and reliable in adjustment, and can be used as a transmission screw rod for various precise micro-angle adjustment.
Finally, it should be noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made to the technical solution of the present invention without departing from the spirit and scope of the technical solution of the present invention, which shall be covered by the scope of the claims of the present invention.
Claims (1)
1. The fine-tuning screw rod assembly with high guidance is characterized by comprising a nut sleeve (1), a screw rod (2) and a handle (3);
the nut sleeve (1) is a cylindrical step cylinder, the left outer wall surface is a cylindrical surface (5), the right end surface is a short step (6), and the inside of the cylinder is divided into three sections: the left section is a precise guide hole (9), the middle section is a neutral groove (8) for leaving the thread excircle of the screw rod (2), the right section is an internal threaded hole (7), and the diameter of the precise guide hole (9) is smaller than that of the internal threaded hole (7);
the screw rod (2) is a stepped cylindrical rod, the left end of the screw rod is provided with an inner hexagonal groove (14), the right end of the screw rod is provided with a spherical tip (13), and the screw rod (2) is divided into three sections: the left cylinder is a precise guide shaft (10) and is in precise sliding fit with a precise guide hole (9) of the nut sleeve (1), the middle cylindrical surface is a tool withdrawal groove (11), and the right cylinder is an external thread (12) and is matched with an internal thread hole (7) of the nut sleeve (1);
the handle (3) is a cylinder, the inner wall of the handle is a unthreaded hole (15) and is in interference fit with the guide shaft (10) of the screw rod (2), and a central countersunk hole (16) is formed in the bottom of the handle (3);
the precision guide shaft (10) of the screw rod (2) sequentially penetrates through the internal threaded hole (7) of the nut sleeve (1), the neutral groove (8) and the precision guide hole (9) and is arranged in the cylinder of the nut sleeve (1), the precision guide shaft (10) of the screw rod (2) is in precision sliding fit with the precision guide hole (9) of the nut sleeve (1), the external thread (12) of the screw rod (2) is in threaded fit with the internal threaded hole (7) of the nut sleeve (1), the spherical tip of the screw rod (2) is used for contacting a driven piece, the left end of the guide shaft (10) of the screw rod (2) abuts against the bottom of the inner wall unthreaded hole (15) of the handle (3), the inner hexagonal groove (14) at the left end of the guide shaft (10) is arranged in the center countersunk hole (16) at the bottom of the handle (3) in an interference fit manner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010304665.7A CN113531073B (en) | 2020-04-17 | 2020-04-17 | Fine tuning screw rod assembly with high guidance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010304665.7A CN113531073B (en) | 2020-04-17 | 2020-04-17 | Fine tuning screw rod assembly with high guidance |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113531073A CN113531073A (en) | 2021-10-22 |
| CN113531073B true CN113531073B (en) | 2024-03-01 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010304665.7A Active CN113531073B (en) | 2020-04-17 | 2020-04-17 | Fine tuning screw rod assembly with high guidance |
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| Country | Link |
|---|---|
| CN (1) | CN113531073B (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0235821A2 (en) * | 1986-03-07 | 1987-09-09 | Veb Kombinat Robotron | Screw transmission |
| JP3118530U (en) * | 2005-08-01 | 2006-02-02 | 有限会社丸倶エスエス | Fine positioning feed screw operation section and operation tool |
| JP2006234151A (en) * | 2005-02-28 | 2006-09-07 | Pubot Giken:Kk | Ball screw device and linear actuator |
| CN200967620Y (en) * | 2006-09-19 | 2007-10-31 | 内蒙古北方重工业集团有限公司 | Axle end-face thread block |
| WO2014167984A1 (en) * | 2013-04-08 | 2014-10-16 | 有限会社ジュコー精機 | Cutting tool for machining nut in sliding screw device and method for machining nut |
| JP2017032124A (en) * | 2015-08-06 | 2017-02-09 | Ntn株式会社 | Ball Screw |
| CN208238687U (en) * | 2018-06-22 | 2018-12-14 | 北京卓立汉光仪器有限公司 | A kind of differential displacement adjustment and measuring device |
| CN109838525A (en) * | 2019-03-15 | 2019-06-04 | 中国科学院上海光学精密机械研究所 | High guiding performance, low drifting angle adjustment fine-tuning screw component |
| CN212272969U (en) * | 2020-04-17 | 2021-01-01 | 中国科学院上海光学精密机械研究所 | Fine adjustment screw rod assembly with high guidance performance |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106402306B (en) * | 2016-09-26 | 2019-12-03 | 中国科学院上海光学精密机械研究所 | Angle adjustment fine-tuning screw component |
-
2020
- 2020-04-17 CN CN202010304665.7A patent/CN113531073B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0235821A2 (en) * | 1986-03-07 | 1987-09-09 | Veb Kombinat Robotron | Screw transmission |
| JP2006234151A (en) * | 2005-02-28 | 2006-09-07 | Pubot Giken:Kk | Ball screw device and linear actuator |
| JP3118530U (en) * | 2005-08-01 | 2006-02-02 | 有限会社丸倶エスエス | Fine positioning feed screw operation section and operation tool |
| CN200967620Y (en) * | 2006-09-19 | 2007-10-31 | 内蒙古北方重工业集团有限公司 | Axle end-face thread block |
| WO2014167984A1 (en) * | 2013-04-08 | 2014-10-16 | 有限会社ジュコー精機 | Cutting tool for machining nut in sliding screw device and method for machining nut |
| JP2017032124A (en) * | 2015-08-06 | 2017-02-09 | Ntn株式会社 | Ball Screw |
| CN208238687U (en) * | 2018-06-22 | 2018-12-14 | 北京卓立汉光仪器有限公司 | A kind of differential displacement adjustment and measuring device |
| CN109838525A (en) * | 2019-03-15 | 2019-06-04 | 中国科学院上海光学精密机械研究所 | High guiding performance, low drifting angle adjustment fine-tuning screw component |
| CN212272969U (en) * | 2020-04-17 | 2021-01-01 | 中国科学院上海光学精密机械研究所 | Fine adjustment screw rod assembly with high guidance performance |
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| CN113531073A (en) | 2021-10-22 |
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