CN212272969U - Fine adjustment screw rod assembly with high guidance performance - Google Patents
Fine adjustment screw rod assembly with high guidance performance Download PDFInfo
- Publication number
- CN212272969U CN212272969U CN202020575162.9U CN202020575162U CN212272969U CN 212272969 U CN212272969 U CN 212272969U CN 202020575162 U CN202020575162 U CN 202020575162U CN 212272969 U CN212272969 U CN 212272969U
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- screw rod
- hole
- nut sleeve
- precise
- handle
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- 230000005540 biological transmission Effects 0.000 abstract description 14
- 238000006073 displacement reaction Methods 0.000 abstract description 9
- 230000008878 coupling Effects 0.000 abstract description 3
- 238000010168 coupling process Methods 0.000 abstract description 3
- 238000005859 coupling reaction Methods 0.000 abstract description 3
- 238000012545 processing Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 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
- 238000010586 diagram 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
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Abstract
The utility model provides a fine setting lead screw subassembly of high guidance quality, includes nut cover, lead screw and handle, and the nut cover is a cylindrical step drum, and the lead screw is a step cylindric pole, and the lead screw divide into the three-section: the left cylinder is a precise guide shaft and is in precise sliding fit with the precise guide hole of the nut sleeve, the middle cylindrical surface is a tool withdrawal groove, the right cylinder is an external thread and is matched with the internal thread hole of the nut sleeve, and the precise fit guide surface and the fit thread surface are respectively processed on the left side and the right side of the external cylindrical surface of the screw rod and the internal cylindrical surface of the nut sleeve, so that the guide and transmission functions of coupling in the original screw rod and nut sleeve matched thread pair are decoupled, and the precise sliding fit which has a separate guide function is added. The utility model has the characteristics of the linear displacement transmission is accurate, the guidance quality is good, the adjustment is reliable and stable, can be used as the transmission lead screw of the high accurate micro angle adjustment of various direction required precision.
Description
Technical Field
The utility model relates to a fine setting lead screw subassembly, especially a fine setting lead screw subassembly of high guidance quality, the transmission lead screw that the various accurate micro-angle adjustment of mainly used.
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
An object of the utility model is to provide a fine setting lead screw subassembly of high guidance quality, this subassembly have that the linear displacement transmission is accurate, the guidance quality is good, the reliable and stable characteristics of adjustment, can be used as the transmission lead screw of the accurate micro-angle adjustment that various direction precision required height.
The technical solution of the utility model 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 way, the middle cylindrical surface is a tool withdrawal groove, and the right cylinder is an external thread and is matched with the internal thread hole 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 hole, the hollow 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 hole 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 installed 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 utility model discloses an adjustment process:
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.
The technical effects of the utility model:
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 assembly cross-sectional view of the highly guiding fine tuning screw rod assembly of the present invention
FIG. 2 is a cross-sectional view of the nut sleeve of the high-guidance fine tuning screw rod assembly of the present invention
FIG. 3 is a lead screw appearance diagram of the fine tuning lead screw assembly of the present invention
FIG. 4 is a cross-sectional view of the handle of the high-guiding fine-tuning screw rod assembly of the present invention
Detailed Description
The present invention will be further described with reference to the following drawings and examples, which should not be construed as limiting the scope of the present invention.
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 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 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 hole 7, the hollow groove 8 and the precision guide hole 9 of the nut sleeve 1 and is arranged in the cylinder of the nut sleeve 1, the precision guide shaft 10 of the screw rod 2 is precisely matched with the precision guide hole 9 of the nut sleeve 1 in a sliding way, the external thread 12 of the screw rod 2 is matched with the internal thread hole 7 of the nut sleeve 1 in a threaded way, 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 installed with the inner wall unthreaded hole 15 of the handle 3 in an interference fit way, and the inner hexagonal groove 14 of the left end of the guide shaft 10 is positioned in the central countersunk hole 16 of the bottom of the handle 3.
Firstly, the right external thread 12 of the screw rod 2 is screwed into the internal thread hole 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 internal hexagonal screwdriver is directly inserted into the internal hexagonal groove end 14 of the left end surface of the.
The experiment shows, the utility model discloses to realize the decoupling zero with the direction function with the transmission of coupling in original lead screw and nut cover complex screw thread pair, carry out screw-thread fit and sliding fit realization transmission and direction respectively through the helicoid and the spigot surface that exist simultaneously on lead screw and the nut cover face of cylinder, current processing level enables spigot surface fit clearance and reaches several micron order deviation levels, has broken away from the influence of great radial clearance to the direction precision in the original screw-thread fit, ensures the accurate transmission of the trace linear displacement of direction.
The utility model discloses the fine setting lead screw subassembly linear displacement direction of high guidance quality is accurate, and the adjustment is reliable and stable, can be used as the transmission lead screw of various accurate micro-angle adjustment.
Finally, it should be noted that the above embodiments are only used 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 can 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 scope of the claims of the present invention.
Claims (1)
1. A fine adjustment 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 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 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 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 hole (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 hole (7) of the nut sleeve (1), the spherical tip of the screw rod (2) is in 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 internal hexagonal groove (14) at the left end of the guide shaft (10) is positioned in a central countersunk hole (16) at the bottom of the handle (3) And (4) the following steps.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020575162.9U CN212272969U (en) | 2020-04-17 | 2020-04-17 | Fine adjustment screw rod assembly with high guidance performance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020575162.9U CN212272969U (en) | 2020-04-17 | 2020-04-17 | Fine adjustment screw rod assembly with high guidance performance |
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| Publication Number | Publication Date |
|---|---|
| CN212272969U true CN212272969U (en) | 2021-01-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020575162.9U Withdrawn - After Issue CN212272969U (en) | 2020-04-17 | 2020-04-17 | Fine adjustment screw rod assembly with high guidance performance |
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| CN (1) | CN212272969U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113531073A (en) * | 2020-04-17 | 2021-10-22 | 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 CN202020575162.9U patent/CN212272969U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113531073A (en) * | 2020-04-17 | 2021-10-22 | 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 |
| CN113531073B (en) * | 2020-04-17 | 2024-03-01 | 中国科学院上海光学精密机械研究所 | Fine tuning screw rod assembly with high guidance |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20210101 Effective date of abandoning: 20240301 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20210101 Effective date of abandoning: 20240301 |
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| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |