CN113531073A - Fine adjustment screw rod assembly with high guidance performance - Google Patents
Fine adjustment screw rod assembly with high guidance performance Download PDFInfo
- Publication number
- CN113531073A CN113531073A CN202010304665.7A CN202010304665A CN113531073A CN 113531073 A CN113531073 A CN 113531073A CN 202010304665 A CN202010304665 A CN 202010304665A CN 113531073 A CN113531073 A CN 113531073A
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- screw rod
- nut sleeve
- handle
- hole
- precise
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- 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
- 238000000034 method Methods 0.000 description 3
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000004519 grease Substances 0.000 description 2
- 230000013011 mating Effects 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
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 adjustment 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 requirement on various guidance precision.
Description
Technical Field
The invention relates to a fine adjustment screw rod assembly, in particular to a fine adjustment screw rod assembly with high guidance performance, which is mainly used for a transmission screw rod for adjusting various precise micro angles.
Background
The common fine adjustment screw rod component realizes linear micro-displacement transmission through the thread matching of the screw rod and the nut sleeve, wherein the cylindrical surface of the screw rod is completely processed with external threads, and the screw rod is guided and driven into a whole. Due to machining errors of a triangular threaded hole surface and a shaft surface used for driving, a large radial gap exists in a matched thread, a small inclination angle is generated between a transmission screw rod and a nut sleeve, and linear guidance performance is poor. In order to improve the radial clearance error, it is conventional to add grease or valuable powder material to the thread mating surfaces or to machine more precise thread mating. In the former method, the radial clearance is not improved essentially, and as the use times are increased, the distribution state of the lubricating grease or the organic powder filled between the thread matching surfaces is changed and even flows out of the thread surfaces, so that the clearance is enlarged; the latter approach increases processing costs and processing requirements.
Disclosure of Invention
The invention aims to provide a high-guidance fine adjustment screw rod assembly 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 guidance precision requirements.
The technical solution of the invention is as follows:
a fine adjustment screw rod assembly with high guidance quality is characterized by comprising a nut sleeve, a screw rod and a handle;
the nut sleeve is a cylindrical stepped cylinder, the left outer wall surface is a cylindrical surface, the right end surface is a short step, and the interior of the cylinder is divided into three sections: the left section is a precise guide hole, the middle section is a neutral groove for leaving the thread excircle of the screw rod, the right section is an internal thread hole, and the diameter of the precise guide hole is smaller than that of the internal thread hole;
the lead screw is a step cylindrical rod, the left end of the lead screw is provided with an inner hexagonal groove, the right end of the lead screw is a spherical tip, and the lead screw is divided into three sections: the left cylinder is a precise guide shaft and is precisely matched with the precise guide hole of the nut sleeve in a sliding manner, 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 idle 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 is abutted 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:
the screw rod right side external thread is screwed into the nut sleeve internal thread, the screw rod left side guide shaft and the nut sleeve left side guide hole are in sliding fit, the screw rod guide shaft end is in interference fit with the handle inner wall unthreaded hole and is abutted against the bottom of the unthreaded hole, the knob handle is continuously contacted with a driven piece until the spherical tip point of the screw rod is contacted, the precise guide micro linear displacement driving of the tip of the ball head is realized through controlling the knob screw rod handle, or an inner hexagonal screwdriver is directly utilized to be inserted into an inner hexagonal groove of the end surface of the left side of the screw rod through a countersunk hole at the bottom of the handle to realize the knob.
The invention has the technical effects that:
through processing accurate cooperation spigot surface and cooperation flank of screw respectively in the outer face of cylinder of lead screw and the inner cylindrical surface left and right sides of nut cover, the direction and the transmission function of coupling in the screw thread pair of original lead screw and nut cover complex realize the decoupling zero, the accurate sliding fit who plays the guide effect alone has been added, the influence of great radial clearance to the direction precision in having broken away from original screw-thread fit, carry out the precision finishing cooperation to nut cover accurate spigot hole face and the accurate guiding shaft face of lead screw, current process level can make the radial screw-thread fit clearance of original tens of microns or even hundreds of microns reduce to within the several micron order deviation levels, thereby realize the drive of accurate direction trace linear displacement. The screw rod assembly has precise linear displacement guide and stable and reliable adjustment, and can be used as a transmission screw rod for various precise micro-angle adjustments.
Drawings
FIG. 1 is an assembled cross-sectional view of a highly guided fine adjustment screw assembly of the present invention
FIG. 2 is a cross-sectional view of a nut sleeve of the highly guided fine adjustment lead screw assembly of the present invention
FIG. 3 is an external view of a lead screw of the highly guided fine adjustment lead screw assembly of the present invention
FIG. 4 is an external view of the handle of the highly guided fine adjustment screw assembly of the present invention
Detailed Description
The present invention will be further described with reference to the following drawings and examples, but the scope of the present invention should not be limited thereby.
Referring to fig. 1 to 4, it can be seen that the fine tuning screw rod assembly with high guiding performance of the present invention is characterized by comprising a nut sleeve 1, a screw rod 2 and a handle 3;
the nut sleeve 1 is a cylindrical stepped cylinder, the left outer wall surface is a cylindrical surface 5, the right end surface is a short step 6, and the interior 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 thread hole 7, and the diameter of the precise guide hole 9 is smaller than that of the internal thread hole 7;
the screw rod 2 is a step 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 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 precisely matched with a precise guide hole 9 of the nut sleeve 1 in a sliding way, 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 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 the bottom of the handle 3 is provided with a central countersunk hole 16;
the precision guide shaft 10 of the screw rod 2 sequentially passes through the internal thread 7 of the nut sleeve 1, the idle 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 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 is abutted 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 arranged in the central countersunk hole 16 at the bottom of the handle 3.
Firstly, the right external thread 12 of the screw rod 2 is screwed into the internal thread 7 of the nut sleeve 1, the left guide shaft 10 of the screw rod 2 is in sliding fit with the left guide hole 9 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 knob handle 3 is continuously turned until the spherical tip 13 of the screw rod 2 is in point contact with a driven piece, and the precise guiding micro linear displacement driving of the ball tip 13 is realized through the left knob handle 3 and the right knob handle 3, or an inner hexagonal screwdriver is directly inserted into an inner hexagonal groove end 14 of the left end surface of the screw rod 2 to realize the knob.
Experiments show that the invention realizes decoupling of the coupling transmission and guide functions in the original screw pair matched with the screw rod and the nut sleeve, realizes transmission and guide by respectively performing thread matching and sliding matching on the thread surface and the guide surface which are simultaneously arranged on the cylindrical surfaces of the screw rod and the nut sleeve, and ensures the precision transmission of micro linear displacement of guide by enabling the matching clearance of the guide surface to reach the deviation level of several microns by the existing processing level, getting rid of the influence of larger radial clearance in the original thread matching on the guide precision.
The high-guidance fine adjustment screw rod assembly has precise linear displacement guidance and stable and reliable adjustment, and can be used as a transmission screw rod for various precise micro-angle adjustments.
Finally, it should be noted that the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, 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 or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.
Claims (1)
1. A fine adjustment screw rod assembly with high guidance quality is characterized by comprising a nut sleeve (1), a screw rod (2) and a handle (3);
the nut sleeve (1) is a cylindrical stepped cylinder, the left outer wall surface is a cylindrical surface (5), the right end surface is a short step (6), and the interior of the cylinder is divided into three sections: the left section is a precise guide hole (9), the middle section is a hollow groove (8) for keeping off the thread excircle of the screw rod (2), the right section is an internal thread hole (7), and the diameter of the precise guide hole (9) is smaller than that of the internal thread hole (7);
the lead screw (2) is a step cylindrical rod, the left end of the lead screw is provided with an inner hexagonal groove (14), the right end of the lead screw is a spherical tip (13), and the lead screw (2) is divided into three sections: the left cylinder is a precise guide shaft (10) and is precisely matched with a precise guide hole (9) of the nut sleeve (1) in a sliding manner, 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 (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 the bottom of the handle (3) is provided with a central counter bore (16);
the precise guide shaft (10) of the screw rod (2) sequentially passes through the internal thread (7) of the nut sleeve (1), the idle groove (8) and the precise guide hole (9) 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 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 installed in 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 located in a central countersunk hole (16) at the bottom of the handle (3).
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 true CN113531073A (en) | 2021-10-22 |
| CN113531073B CN113531073B (en) | 2024-03-01 |
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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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| CN (1) | CN113531073B (en) |
Citations (10)
| 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 |
| US20180088621A1 (en) * | 2016-09-26 | 2018-03-29 | Shanghai Institute Of Optics And Fine Mechanics, Chinese Academy Of Sciences | Micro-movement subassembly for angle adjustment |
| 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 |
-
2020
- 2020-04-17 CN CN202010304665.7A patent/CN113531073B/en active Active
Patent Citations (10)
| 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 |
| US20180088621A1 (en) * | 2016-09-26 | 2018-03-29 | Shanghai Institute Of Optics And Fine Mechanics, Chinese Academy Of Sciences | Micro-movement subassembly for angle adjustment |
| 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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|---|---|
| CN113531073B (en) | 2024-03-01 |
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