CN113790201A - Three-jaw telescopic hydraulic tensioning positioning pin - Google Patents
Three-jaw telescopic hydraulic tensioning positioning pin Download PDFInfo
- Publication number
- CN113790201A CN113790201A CN202111075287.0A CN202111075287A CN113790201A CN 113790201 A CN113790201 A CN 113790201A CN 202111075287 A CN202111075287 A CN 202111075287A CN 113790201 A CN113790201 A CN 113790201A
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- pin
- tensioning
- shaft
- oil
- mounting flange
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- 210000000078 claw Anatomy 0.000 claims abstract description 61
- 238000007789 sealing Methods 0.000 claims description 36
- 238000000926 separation method Methods 0.000 claims description 3
- 238000003754 machining Methods 0.000 abstract description 6
- 239000003921 oil Substances 0.000 description 51
- 238000005266 casting Methods 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
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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
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B19/00—Bolts without screw-thread; Pins, including deformable elements; Rivets
- F16B19/02—Bolts or sleeves for positioning of machine parts, e.g. notched taper pins, fitting pins, sleeves, eccentric positioning rings
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Clamps And Clips (AREA)
Abstract
The invention relates to a three-jaw telescopic hydraulic tensioning positioning pin which comprises a guide pin end cover, a tensioning claw mounting seat, a tensioning pin sliding block, a pin shaft, a tensioning pin mandrel and a mounting flange, wherein the guide pin end cover is arranged on the guide pin; two oil holes are formed in the outer wall of the shaft sleeve of the mounting flange and are respectively communicated with an oil inlet cavity and an oil return cavity of the shaft sleeve; the pin shaft is inserted into the mounting flange, and two annular grooves are formed in the side surface of the pin shaft and are respectively communicated with an oil inlet and return cavity of a shaft sleeve of the mounting flange; the pin shaft is provided with an air hole which is axially communicated; the guide pin end cover is connected with the tensioning claw mounting seat, the tensioning claw is connected with the tensioning pin sliding block, one end of the tensioning claw mounting seat is inserted into the pin shaft, and the tensioning pin mandrel is inserted into an inner hole of the tensioning claw mounting seat; the axial movement of the core expansion pin shaft is converted into the radial movement of the expansion pin sliding block. The positioning pin of the technical scheme can realize positioning by using the large hole in finish machining, can meet the requirement of finish machining and can correct the position by using the specific hole in the machining process.
Description
Technical Field
The invention belongs to the technical field of positioning pins, and particularly relates to a three-jaw telescopic hydraulic tensioning positioning pin.
Background
The part processing in the manufacturing industry at present often needs to use the casting blank to cast the hole location in advance, general fixed locating pin can not satisfy the location of blank part, because the macropore diameter casting error is great, with 50-100mm diameter macropore, its casting diameter fluctuation reaches about 0.35mm, use fixed locating pin then can't be accurate location, and the blank phenomenon of off tracking after the easy emergence location.
In order to overcome the problem that the fixed positioning pin cannot be accurately positioned, the positioning pin which is complex in structure and needs hydraulic pressure to control is used, and the fixed positioning pin cannot be used on a small hole.
Disclosure of Invention
The invention aims to provide a three-jaw telescopic hydraulic tensioning positioning pin, which solves the problems that the existing positioning pin can be greatly reduced in the hole setting precision of more than 20mm and can not be used for finish machining positioning basically.
In order to realize the purpose, the invention is realized by the following technical scheme:
a three-jaw telescopic hydraulic tensioning positioning pin comprises a guide pin end cover, a tensioning claw mounting seat, a tensioning pin sliding block, a pin shaft, a tensioning pin core shaft and a mounting flange;
the mounting flange is characterized in that the outer wall of a shaft sleeve of the mounting flange is provided with two oil holes, namely a first oil hole and a second oil hole, wherein the first oil hole is communicated with an oil inlet cavity of the shaft sleeve, and the second oil hole is communicated with an oil return cavity of the shaft sleeve;
the pin shaft is inserted into the mounting flange, and two annular grooves, namely a first annular groove and a second annular groove, are arranged on the side surface of the pin shaft, wherein the first annular groove is communicated with an oil inlet cavity of a shaft sleeve of the mounting flange, and the second annular groove is communicated with an oil return cavity of the shaft sleeve of the mounting flange;
the pin shaft is provided with an air hole which is axially communicated;
the guide pin end cover is connected with the tensioning claw mounting seat, the tensioning claw is connected with the tensioning pin sliding block, one end of the tensioning claw mounting seat is inserted into the pin shaft, and the tensioning pin mandrel is inserted into an inner hole of the tensioning claw mounting seat; after the tensioning claw mounting seat, the pin shaft and the tensioning pin core shaft are assembled, an oil cylinder mechanism is formed;
the top end of the expansion pin mandrel is provided with three dovetail wedge structures which are assembled with a dovetail groove at one end of the expansion pin sliding block to form an assembly, and the assembly converts the axial movement of the expansion pin mandrel into the radial movement of the expansion pin sliding block.
Furthermore, the diameter of the guide pin end cover is basically consistent with the diameter of the tensioning claw when the tensioning claw retracts, and a conical part is arranged at the front end of the guide pin end cover.
Furthermore, the guide pin end cover and the tensioning claw mounting seat are positioned by a positioning pin and fixed by an end cover fastening bolt, and a melt-molded plug is arranged on the outer side of the end cover fastening bolt.
Furthermore, the tensioning claw comprises a tensioning claw body and a handle-shaped rod, the tensioning claw body is of a one-third arc structure, and a wedge-shaped groove is formed in the side wall of the handle-shaped rod.
Furthermore, a first sealing ring is arranged between the tensioning claw mounting seat and the pin shaft, and the tensioning claw mounting seat and the pin shaft are fixedly connected through a pin shaft fastening bolt.
Furthermore, a first expansion pin mandrel sealing ring and a second expansion pin mandrel sealing ring are used for sealing between the expansion pin mandrel and the expansion claw mounting seat.
Furthermore, a first pin shaft sealing ring, a second pin shaft sealing ring and a third pin shaft sealing ring are arranged between the pin shaft and the shaft sleeve of the mounting flange, so that an oil path is isolated, and oil supply of an oil inlet path and an oil return path is stable when the pin shaft moves axially.
Furthermore, six counter bores are formed in the flange end face of the mounting flange.
Furthermore, a first mounting flange sealing ring, a second mounting flange sealing ring and a third mounting flange sealing ring are arranged on the outer side wall of the shaft sleeve of the mounting flange, so that an oil circuit is isolated.
The invention has the beneficial effects that:
this technical scheme's locating pin can realize using the macropore to fix a position in the finish machining, can promote macroporous positioning accuracy to 0.03mm, can satisfy the finish machining and use specific hole to carry out the position in the course of working and rectify.
Drawings
FIG. 1 is a schematic structural view of a three-jaw telescopic hydraulic tensioning positioning pin of the invention;
FIG. 2 is an axial sectional view of the three-jaw telescopic hydraulic tensioning positioning pin of the invention;
FIG. 3 is a left side view of the three-jaw telescopic hydraulic tensioning positioning pin shaft of the present invention;
FIG. 4 is a right side view of the three-jaw telescopic hydraulic tensioning positioning pin shaft of the present invention;
FIG. 5 is a cross-sectional view A-A of FIG. 3;
FIG. 6 is a cross-sectional view B-B of FIG. 3;
FIG. 7 is a cross-sectional view C-C of FIG. 4;
FIG. 8 is a schematic view of the tensioning claw structure;
FIG. 9 is a schematic structural view of a tensioning claw mounting seat;
FIG. 10 is a schematic view of a pin structure;
FIG. 11 is a schematic view of a mounting flange configuration;
FIG. 12 is an axial cross-sectional view of FIG. 11;
FIG. 13 is a schematic view of the structure of the pin mandrel;
fig. 14 is a structural schematic view of the expanding pin slider.
Description of the reference numerals
100. A guide pin end cap; 101. the expansion pin adjusting hole plugs the screw; 102. melt-molding and plugging; 103. melt-molding and plugging; 104. positioning pins; 105. an end cover fastening bolt; 200. a tensioning claw; 201. tightening the screw by the tightening claw; 300. a tensioning claw mounting seat; 301. a first seal ring; 302. a first gas path sealing ring; 400. a pin shaft; 401. a second gas path sealing ring; 402. a gas path plugging screw; 403. retracting the oil path plugging screw; 404. locking the bolt by the pin shaft; 405. melt-molding and plugging; 500. installing a flange; 501. a first pin shaft seal ring; 502. a first mounting flange seal ring; 503. a second mounting flange sealing ring; 504. a second pin shaft seal ring; 505. a third mounting flange sealing ring; 506. a third pin shaft seal ring; 600. a pin expanding mandrel; 601. a first expansion pin mandrel seal ring; 602. a second expansion pin mandrel seal ring; 700. a pin expansion slide block; 701. and a sliding block sealing ring.
Detailed Description
The technical solutions of the present invention are described in detail below by examples, and the following examples are only exemplary and can be used only for explaining and explaining the technical solutions of the present invention, but not construed as limiting the technical solutions of the present invention.
As shown in fig. 1 and 2, the application provides a three-jaw telescopic hydraulic tensioning positioning pin, which includes a guide pin end cover 100, a tensioning claw 200, a tensioning claw mounting seat 300, a tensioning pin slider 700, a pin shaft 400, a tensioning pin mandrel 600, and a mounting flange 500.
Two oil holes are formed in the outer wall of the shaft sleeve of the mounting flange and respectively comprise a first oil hole and a second oil hole, wherein the first oil hole is communicated with an oil inlet cavity of the shaft sleeve, and the second oil hole is communicated with an oil return cavity of the shaft sleeve.
The pin shaft is inserted into the mounting flange, two annular grooves are arranged on the side surface of the pin shaft and respectively form a first annular groove and a second annular groove, the first annular groove is communicated with an oil inlet cavity of a shaft sleeve of the mounting flange, and the second annular groove is communicated with an oil return cavity of the shaft sleeve of the mounting flange.
The pin shaft is provided with an air hole which is axially communicated.
The guide pin end cover is connected with the tensioning claw mounting seat, the tensioning claw is connected with the tensioning pin sliding block, one end of the tensioning claw mounting seat is inserted into the pin shaft, and the tensioning pin mandrel is inserted into an inner hole of the tensioning claw mounting seat; and an oil cylinder mechanism is formed after the tensioning claw mounting seat, the pin shaft and the tensioning pin core shaft are assembled.
The top end of the expansion pin mandrel is provided with three dovetail wedge structures which are assembled with a dovetail groove at one end of the expansion pin sliding block to form an assembly, and the assembly converts the axial movement of the expansion pin mandrel into the radial movement of the expansion pin sliding block.
The positioning pin of the technical scheme can be connected with a hydraulic oil cylinder at the positioning bottom (shown in figure 3) to control the stretching of the positioning pin so as to realize the function of actively inserting the positioning hole of the product.
When the technical scheme is used, compressed air is required to be connected to the bottom (see figure 3), and sealing is realized through the air passage sealing ring 401.
According to the technical scheme, when the flange is used, a mounting hole with a specific diameter needs to be bored at a using position, the flange shaft needs to be precisely matched with the bored hole in the whole inserting hole of the flange, and meanwhile, two oil ways are arranged in the mounting hole and are respectively butted with the first oil hole and the second oil hole of the outer wall of the shaft sleeve of the flange.
The following detailed description is made:
in the technical scheme, the diameter of the guide pin cover is basically consistent with the diameter of the tensioning claw during retraction and is slightly smaller than the diameter of the positioning hole, and meanwhile, the end part of the guide pin cover is provided with a conical part which plays a role in guiding when the three-claw telescopic hydraulic tensioning positioning pin is inserted into the positioning hole and is used as the whole three-claw telescopic hydraulic tensioning positioning pin end cover.
The guide pin end cover and the tensioning claw mounting seat are accurately positioned through two positioning pins, locking is achieved through three end cover fastening bolts (see fig. 7), and finally waterproof treatment of the end cover is carried out through the plastic melting plug (see fig. 4).
The tight claw that rises is including rising tight claw body and handle form pole, the tight claw body that rises of this application is the one third circular arc structure that rises, totally three tight claw that rises, constitutes a ring structure, handle form pole sets up in the circular arc of the tight claw body that rises, this flexible hydraulic pressure of three claws tight locating pin includes three tight claw that rises, and the unilateral wedge type groove that is provided with on the lateral wall on handle form pole, as shown in figure 8, during the assembly handle form pole inserts and rises in the round pin slider to realize locking and eliminate the axial clearance of handle form pole through the tight claw fastening screw that rises.
As shown in fig. 2 and 9, one end of the tensioning claw mounting seat is inserted into the pin shaft, sealed by the first sealing ring, fixed by the pin shaft fastening bolt, and finally subjected to waterproof treatment by using the molten plastic plug 405. The expansion pin mandrel 600 is inserted into the inner hole of the expansion claw mounting base 300, and sealing is realized through a first expansion pin mandrel sealing ring 601 and a second expansion pin mandrel sealing ring 602. After the tensioning claw mounting base 300, the pin shaft 400 and the tensioning pin mandrel 600 are assembled, an oil cylinder mechanism is formed, and the tensioning pin mandrel 600 is controlled to move axially through oil inlet and return oil channels (refer to fig. 6).
As shown in fig. 2 and 10, two annular oil grooves are formed in the surface of the pin shaft, namely a first annular oil groove and a second annular oil groove, wherein the first annular oil groove is communicated with the oil inlet path, and the second annular oil groove is communicated with the oil return path. The pin 400 is inserted into the mounting flange inner hole 500 (refer to fig. 5), and the first pin sealing ring 501, the second pin sealing ring 504 and the third pin sealing ring 506 are used for realizing oil path separation, so that stable oil supply of an oil inlet path and an oil return path is ensured when the pin 400 moves axially.
The center of the pin 400 is provided with an air hole and is communicated to the mounting seat 300 of the tensioning claw, so that when the tensioning claw is expanded 200, compressed air continuously blows air to the gap between the tensioning claws 200, thereby realizing dust prevention and avoiding the clamping stagnation of the tensioning claws 200 during expansion.
As shown in fig. 2, 11 and 12, the end face of the mounting flange 500 is provided with six counter bores for mounting and fixing the three-jaw telescopic hydraulic tensioning positioning pin (refer to fig. 5). The outer wall of the shaft sleeve of the mounting flange is provided with two oil holes, namely a first oil hole and a second oil hole, the first oil hole is communicated with an oil inlet cavity of the shaft sleeve of the mounting flange, the second oil hole is communicated with an oil return cavity of the shaft sleeve of the mounting flange, and oil circuit separation is realized through a first mounting flange sealing ring 502, a second mounting flange sealing ring 503 and a third mounting flange sealing ring 505.
As shown in fig. 2 and 13, the top end of the expanding pin mandrel 600 is provided with three dovetail wedge structures, and the three dovetail wedge structures are matched with a dovetail groove at one end of the expanding pin slider 700 to form an assembly, and the axial movement of the expanding pin mandrel 600 is converted into the radial movement of the expanding pin slider 700 through the assembly.
As shown in fig. 2 and 14, the tension pin slider is responsible for converting the axial movement of the tension pin mandrel 600 into a radial movement, and transmitting the radial movement to the tension claw 200, so as to realize the expansion or retraction of the tension claw.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (9)
1. A three-jaw telescopic hydraulic tensioning positioning pin is characterized by comprising a guide pin end cover, a tensioning jaw mounting seat, a tensioning pin sliding block, a pin shaft, a tensioning pin mandrel and a mounting flange;
the mounting flange is characterized in that the outer wall of a shaft sleeve of the mounting flange is provided with two oil holes, namely a first oil hole and a second oil hole, wherein the first oil hole is communicated with an oil inlet cavity of the shaft sleeve, and the second oil hole is communicated with an oil return cavity of the shaft sleeve;
the pin shaft is inserted into the mounting flange, and two annular grooves, namely a first annular groove and a second annular groove, are arranged on the side surface of the pin shaft, wherein the first annular groove is communicated with an oil inlet cavity of a shaft sleeve of the mounting flange, and the second annular groove is communicated with an oil return cavity of the shaft sleeve of the mounting flange;
the pin shaft is provided with an air hole which is axially communicated;
the guide pin end cover is connected with the tensioning claw mounting seat, the tensioning claw is connected with the tensioning pin sliding block, one end of the tensioning claw mounting seat is inserted into the pin shaft, and the tensioning pin mandrel is inserted into an inner hole of the tensioning claw mounting seat; after the tensioning claw mounting seat, the pin shaft and the tensioning pin core shaft are assembled, an oil cylinder mechanism is formed;
the top end of the expansion pin mandrel is provided with three dovetail wedge structures which are assembled with a dovetail groove at one end of the expansion pin sliding block to form an assembly, and the assembly converts the axial movement of the expansion pin mandrel into the radial movement of the expansion pin sliding block.
2. The three-jaw telescopic hydraulic tensioning positioning pin as claimed in claim 1, wherein the diameter of the guide pin end cover is substantially the same as the diameter of the tensioning jaw when the tensioning jaw retracts, and a tapered portion is arranged at the front end of the guide pin end cover.
3. The three-jaw telescopic hydraulic tensioning positioning pin according to claim 1, wherein the guide pin end cover and the tensioning claw mounting seat are positioned by the positioning pin and fixed by an end cover fastening bolt, and a melt-molded plug is arranged outside the end cover fastening bolt.
4. The three-jaw telescopic hydraulic tensioning positioning pin as claimed in claim 1, wherein the tensioning claw comprises a tensioning claw body and a handle-shaped rod, the tensioning claw body is of a one-third arc structure, and a wedge-shaped groove is formed in the side wall of the handle-shaped rod.
5. The three-jaw telescopic hydraulic tensioning positioning pin according to claim 1, wherein a first sealing ring is arranged between the tensioning jaw mounting seat and the pin shaft, and the tensioning jaw mounting seat and the pin shaft are fixedly connected through a pin shaft fastening bolt.
6. The three-jaw telescopic hydraulic tensioning positioning pin according to claim 1, wherein the space between the tensioning pin mandrel and the tensioning claw mounting seat is sealed by a first tensioning pin mandrel sealing ring and a second tensioning pin mandrel sealing ring.
7. The three-jaw telescopic hydraulic tensioning positioning pin according to claim 1, wherein a first pin shaft sealing ring, a second pin shaft sealing ring and a third pin shaft sealing ring are arranged between the pin shaft and the shaft sleeve of the mounting flange, so that an oil path is isolated, and oil supply of an oil inlet path and an oil return path is stable when the pin shaft moves axially.
8. The three-jaw telescopic hydraulic tensioning positioning pin as claimed in claim 1, wherein the flange end face of the mounting flange is provided with six counter bores.
9. The three-jaw telescopic hydraulic tensioning positioning pin as claimed in claim 1, wherein a first mounting flange sealing ring, a second mounting flange sealing ring and a third mounting flange sealing ring are arranged on the outer side wall of the mounting flange shaft sleeve to realize oil path separation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111075287.0A CN113790201B (en) | 2021-09-14 | 2021-09-14 | Three-jaw telescopic hydraulic tensioning positioning pin |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111075287.0A CN113790201B (en) | 2021-09-14 | 2021-09-14 | Three-jaw telescopic hydraulic tensioning positioning pin |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113790201A true CN113790201A (en) | 2021-12-14 |
| CN113790201B CN113790201B (en) | 2022-08-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111075287.0A Active CN113790201B (en) | 2021-09-14 | 2021-09-14 | Three-jaw telescopic hydraulic tensioning positioning pin |
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| Country | Link |
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| CN (1) | CN113790201B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114799240A (en) * | 2022-04-15 | 2022-07-29 | 无锡市润和机械有限公司 | Visual controllable synchronous locking hydraulic tailstock of pressure |
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| JP2008249073A (en) * | 2007-03-30 | 2008-10-16 | Nsk Ltd | Slider fall-out preventive structure of linear guide |
| CN102121496A (en) * | 2011-02-23 | 2011-07-13 | 广汽本田汽车有限公司 | Round pin insertion type positioning device and tensioning positioning round pin thereof |
| CN102837205A (en) * | 2012-09-26 | 2012-12-26 | 保定标正机床有限责任公司 | Hydraulic self-centering inner cavity tensioning mechanism |
| CN204267472U (en) * | 2014-12-11 | 2015-04-15 | 湖北旭扬工贸有限公司 | A kind of fixture Automatic-clamping locating stud |
| CN104564953A (en) * | 2014-12-24 | 2015-04-29 | 佛山市宝航机械装备行业知识产权服务有限公司 | Round pin positioning device |
| CN211737691U (en) * | 2020-03-02 | 2020-10-23 | 无锡市瑞可特科技有限公司 | Diameter-expanding positioning pin |
-
2021
- 2021-09-14 CN CN202111075287.0A patent/CN113790201B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008249073A (en) * | 2007-03-30 | 2008-10-16 | Nsk Ltd | Slider fall-out preventive structure of linear guide |
| CN102121496A (en) * | 2011-02-23 | 2011-07-13 | 广汽本田汽车有限公司 | Round pin insertion type positioning device and tensioning positioning round pin thereof |
| CN102837205A (en) * | 2012-09-26 | 2012-12-26 | 保定标正机床有限责任公司 | Hydraulic self-centering inner cavity tensioning mechanism |
| CN204267472U (en) * | 2014-12-11 | 2015-04-15 | 湖北旭扬工贸有限公司 | A kind of fixture Automatic-clamping locating stud |
| CN104564953A (en) * | 2014-12-24 | 2015-04-29 | 佛山市宝航机械装备行业知识产权服务有限公司 | Round pin positioning device |
| CN211737691U (en) * | 2020-03-02 | 2020-10-23 | 无锡市瑞可特科技有限公司 | Diameter-expanding positioning pin |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114799240A (en) * | 2022-04-15 | 2022-07-29 | 无锡市润和机械有限公司 | Visual controllable synchronous locking hydraulic tailstock of pressure |
| CN114799240B (en) * | 2022-04-15 | 2024-06-14 | 无锡市润和机械有限公司 | Pressure-visible adjustable controllable synchronous locking hydraulic tailstock |
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| Publication number | Publication date |
|---|---|
| CN113790201B (en) | 2022-08-09 |
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