CN205190473U - Inflation screw thread shop bolt - Google Patents
Inflation screw thread shop bolt Download PDFInfo
- Publication number
- CN205190473U CN205190473U CN201520864527.9U CN201520864527U CN205190473U CN 205190473 U CN205190473 U CN 205190473U CN 201520864527 U CN201520864527 U CN 201520864527U CN 205190473 U CN205190473 U CN 205190473U
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- CN
- China
- Prior art keywords
- longitudinal seam
- pin
- screw thread
- hole
- pinhole
- Prior art date
- 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
The utility model relates to an inflation screw thread shop bolt, including having the pin cover in internal thread hole, have from top portion to the bottom portion a before termination first to the longitudinal seam is sheathe in to the pin, firstly forms first bloated portion to the longitudinal seam, pin cover has the second that stops from bottom portion to the top portion before and forms the bloated portion of second to longitudinal seam, second within a definite time to the longitudinal seam, firstly distribute along the circumferencial direction is crisscross to the longitudinal seam for the second to the longitudinal seam. The utility model discloses an inflation screw thread shop bolt, the inner wall of pin cover is the internal thread, utilizes the screw thread angle of screw thread and the bloated portion of this pin of the expansion of the pressure at the bottom of the jig hole during use to make pin external diameter laminating pinhole inner wall, use reach pin and furniture or instrument wherein the pinhole clearance of one side for zero. This kind of fits's precision just simple depend on with the size uniformity of both sides pinhole, avoided a series of problems of shaft hole cooperation in -process.
Description
Technical field
The utility model relates to high position precision parts, is specifically related to the positioning dowel that optical mirror plane is applied.
Background technique
For common off-axis aspheric mirror in optical component, in existing processing scheme, use the installation way of cylindrical pins location and bolton.Cylindrical pins in use coordinates for twice with fixture and workpiece respectively.Wherein need to consider that mounting plane fits tightly and convenient to disassembly, reproducible, so can only adopt Spielpassung.But the optics of routine uses optics fine aluminium mostly from axle mirror, and the material that fixture uses also is aluminium (considering the feasibility of jewel turning and the weight of fixture).This just causes pin-and-hole to plug posteromedian column surface damage several times being lost efficacy in gap, limit the selection of matching gap, usually at 0.02 ~ 0.03mm.Such location is inadequate concerning the reflector of some long focus, so also need other adjustment means in practical operation, affects efficiency and the quality assurance of mass production.
Model utility content
The purpose of this utility model is to overcome the deficiencies in the prior art, provides a kind of and can increase work efficiency and improve the expansion positioning pin nail repeating installation precision.
To achieve the above object of the invention, a kind of expansion screw positioning dowel is provided, comprises the pin sleeve with interior threaded hole, pin sleeve has stop to bottom from tip portion first to longitudinal seam, adjacent first forms the first swollen portion between longitudinal seam; Pin sleeve have stop to tip portion from bottom second to longitudinal seam, adjacent second forms the second swollen portion between longitudinal seam; Described first is along the circumferential direction interspersed to longitudinal seam to longitudinal seam relative to second.
Preferably, described first has along pin sleeve through hole from outside to inside to longitudinal seam terminal; Described second has along pin sleeve through hole from outside to inside to longitudinal seam terminal.
Preferably, five first are comprised to longitudinal seam and five second to longitudinal seam.
Expansion screw positioning dowel of the present utility model, the inwall of pin sleeve is internal thread, the swollen portion of this pin pressure expanded at the bottom of the thread angle of screw thread and fixture hole is utilized, to make pin external diameter fit pin-and-hole inwall, to reach the pin-and-hole gap of pin and furniture or instrument wherein side for zero during use.The precision of this fit system just depends on the dimensional uniformity with both sides pin-and-hole merely, has avoided series of problems in shaft hole matching process.And simple pin-and-hole dimensional uniformity can control to μ level, the beneficial effects of the utility model are the precision substantially increasing working efficiency and repeat to install.
Accompanying drawing explanation
Fig. 1 is the structural representation of expansion screw positioning dowel in the utility model;
Wherein:
1-pin sleeve 2-first is to longitudinal seam 3-second to longitudinal seam
4-first the is swollen swollen portion of portion 5-second
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described further.
Expansion screw positioning screwn according to Fig. 1, comprise the pin sleeve 1 with interior threaded hole, pin sleeve 1 has longitudinal seam, longitudinally being sewed with pin sleeve 1 outer wall is deep into inwall, longitudinally be sewed with two groups, be respectively stop to bottom from tip portion first to longitudinal seam 2, and stop to tip portion from bottom second to longitudinal seam 3.Adjacent first forms the second swollen portion 5 to forming the first swollen portion 4, second between longitudinal seam 2 between longitudinal seam 3, and swollen portion is used for expansion.Have 5 first to longitudinal seam and 5 second to longitudinal seam.First is along the circumferential direction interspersed to longitudinal seam to longitudinal seam relative to second.Make the first swollen portion 4 and the second swollen portion 5 also interlaced.Described first has along pin sleeve through hole from outside to inside to longitudinal seam 2 terminal; Described second has along pin sleeve through hole from outside to inside to longitudinal seam 3 terminal.Pupil, for increasing stress, is placed longitudinal seam when expanding and is torn.
Pin inwall is internal thread, utilizes the elastic structure of this pin pressure expanded at the bottom of the thread angle of bolt and fixture hole during use, to make pin external diameter fit pin-and-hole inwall, to reach the pin-and-hole gap of pin and fixture or workpiece wherein side for zero.The precision of this fit system just depends on the dimensional uniformity with both sides pin-and-hole merely, has avoided series of problems in shaft hole matching process.And simple pin-and-hole dimensional uniformity can control to μ level, substantially increase working efficiency and repeat install precision.In use, the size of expansion screw positioning dowel follows the pin-and-hole of less side in workpiece or fixture.The precision of this fit system just depends on the dimensional uniformity with both sides pin-and-hole merely, has avoided series of problems in shaft hole matching process.
Below the preferred embodiment that the utility model is created is illustrated, but the utility model is created and is not limited to described embodiment, those of ordinary skill in the art can also make all equivalent modification or replacement under the prerequisite without prejudice to the utility model creative spirit, and these equivalent modifications or replacement are all included in the application's claim limited range.
Claims (3)
1. an expansion screw positioning dowel, is characterized in that, comprises the pin sleeve with interior threaded hole, pin sleeve has stop to bottom from tip portion first to longitudinal seam, adjacent first forms the first swollen portion between longitudinal seam; Pin sleeve have stop to tip portion from bottom second to longitudinal seam, adjacent second forms the second swollen portion between longitudinal seam; Described first is along the circumferential direction interspersed to longitudinal seam to longitudinal seam relative to second.
2. expansion screw positioning dowel according to claim 1, is characterized in that, described first has along pin sleeve through hole from outside to inside to longitudinal seam terminal; Described second has along pin sleeve through hole from outside to inside to longitudinal seam terminal.
3. expansion screw positioning dowel according to claim 1, is characterized in that, comprises five first to longitudinal seam and five second to longitudinal seam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520864527.9U CN205190473U (en) | 2015-11-02 | 2015-11-02 | Inflation screw thread shop bolt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520864527.9U CN205190473U (en) | 2015-11-02 | 2015-11-02 | Inflation screw thread shop bolt |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205190473U true CN205190473U (en) | 2016-04-27 |
Family
ID=55783468
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520864527.9U Active CN205190473U (en) | 2015-11-02 | 2015-11-02 | Inflation screw thread shop bolt |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205190473U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108061257A (en) * | 2017-12-08 | 2018-05-22 | 广州创维平面显示科技有限公司 | A kind of backlight module and display device |
-
2015
- 2015-11-02 CN CN201520864527.9U patent/CN205190473U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108061257A (en) * | 2017-12-08 | 2018-05-22 | 广州创维平面显示科技有限公司 | A kind of backlight module and display device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |