CN200946616Y - High intensity precise expansion axle pin - Google Patents
High intensity precise expansion axle pin Download PDFInfo
- Publication number
- CN200946616Y CN200946616Y CN 200620136856 CN200620136856U CN200946616Y CN 200946616 Y CN200946616 Y CN 200946616Y CN 200620136856 CN200620136856 CN 200620136856 CN 200620136856 U CN200620136856 U CN 200620136856U CN 200946616 Y CN200946616 Y CN 200946616Y
- Authority
- CN
- China
- Prior art keywords
- expansion sleeve
- expansion
- screw rod
- section
- tapered section
- 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.)
- Expired - Lifetime
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- Pivots And Pivotal Connections (AREA)
Abstract
The utility model provides a high strength precise expansion axle pin, which comprises an expansion sleeve, inner diameter of the expansion sleeve having a taper. The bolt consists of a taper section and a thread section, diameter of the taper section end nearing the thread section being smaller than that of the other end, the taper section being packed by the expansion sleeve. The utility model realizes firm fixation by interference fit between expansion of the expansion sleeve and a work-piece hole, has the advantages of ultra-long life, high safety reliability, high precision, excellent ruggedness, easy processing, convenient mounting, small space occupancy and simple dismounting etc.
Description
(1) technical field
The utility model relates to a kind of accurate link, specifically a kind of device of being fastenedly connected between two large-scale workpieces realized.
(2) background technique
At present, realizing connecting between two large-scale workpieces mainly is to utilize plain bolt to be fastenedly connected.There are many deficiencys in this connection of carrying out between the large-scale workpiece with plain bolt, and be mainly reflected in: 1, intensity is low, can occur fracture when being subjected to bigger moment, causes the accident or influences production.2, precision is low, and the screw processed complex of the screw thread of bolt and workpiece and can not closely cooperating is easy to generate play, and nut is easily loosening during long-term vibration work.3, fastening complexity is installed, needs bigger instrument and the very big power that screws and working space.
(3) summary of the invention
Goal of the invention of the present utility model is to provide a kind of firm connection, easy to operate, easy-to-dismount high-strength accurate expansion pivot pin.
The purpose of this utility model is achieved in that it comprises that internal diameter has the expansion sleeve of tapering, and by the screw rod that tapered section and thread section are formed, the diameter of the close threaded end of tapered section is less than the diameter of the other end, and the tapered section of screw rod is enclosed within the expansion sleeve.
The utility model can also comprise following structure characteristic:
1, expansion sleeve internal diameter and screw rod tapered section precision-fit.
2, on the surface of the tapered section of screw rod, have oil duct, have the oil hole that is connected with oil duct at the thread section center.
3, described oil duct shape in the shape of a spiral.
The utility model makes screw rod tapered section and expansion sleeve relative displacement in the expansion sleeve by the drawing to pivot pin, and expansion sleeve expands two workpiece hole were formed the win cooperation, reaches the purpose that two large-scale workpieces are fastenedly connected.
With utilize plain bolt to carry out being fastenedly connected between two large-scale workpieces to compare, device of the present utility model has following advantage: 1, intensity height, overlong service life, easy-rupturing not improve safety reliability.2, precision height, by the mutual tapering of screw rod and expansion sleeve, tension is expanded, and realizes the drive fit with two workpiece hole.Workpiece only need punch, and processing is simple.3, simple installation does not need big working space, by drawing, expansion sleeve is expanded, and realizes drive fit.4, dismounting is simple, only needs oil hydraulic pump to pressurize by oil hole, and expansion sleeve just produces with screw rod and becomes flexible, and can easily take out, and does not damage screw rod.
(4) description of drawings
Fig. 1 is the structural representation of screw rod;
Fig. 2 is the structural representation of expansion sleeve;
Fig. 3 is an assembly structure schematic representation of the present utility model;
Fig. 4 to Fig. 6 is an installation process schematic representation of the present utility model.
(5) embodiment
For a more detailed description to the utility model for example below in conjunction with accompanying drawing:
In conjunction with Fig. 3, the composition of high-strength accurate expansion pivot pin comprises accurate screw rod of being made up of tapered section and thread section 4 and the accurate expansion sleeve 5 that is enclosed within the screw rod tapered section.In conjunction with Fig. 1, screw rod is made up of the thread section and the tapered section of band oil hole 1 and screw thread 2, and tapered section and thread section connect in aggregates.The diameter of the close threaded end of tapered section is less than the diameter of the other end.Have oil duct 3 on the surface of the tapered section of screw rod, the lard hole in thread section is connected with oil duct, and oil duct is shape in the shape of a spiral.In conjunction with Fig. 3, the internal diameter tapering that is enclosed within the outer accurate expansion sleeve of screw rod tapered section cooperates with screw Precise, and the external diameter two ends equate.
In conjunction with Fig. 4-6, during with fastening two large-scale workpieces of device of the present utility model, to on workpiece, process earlier and portal, device of the present utility model is placed the hole, on the screw flight section, put hydraulic nut,, expansion sleeve is expanded by hydraulic buckling mode drawing screw rod, realize drive fit, screw nut and promptly finished whole connection procedure.
The dismounting pivot pin: when pivot pin need be dismantled, with the oil hydraulic pump pressurization, by oil hole and helical oil duct, expansion sleeve and tapering pivot pin are eliminated closely cooperated, expansion sleeve recovers original size, takes out whole pivot pin.
Claims (3)
1, a kind of high-strength accurate expansion pivot pin is characterized in that: it comprises that internal diameter has the expansion sleeve of tapering, and by the screw rod that tapered section and thread section are formed, the diameter of the close threaded end of tapered section is less than the diameter of the other end, and the tapered section of screw rod is enclosed within the expansion sleeve.
2, high-strength accurate expansion pivot pin according to claim 1 is characterized in that: have oil duct on the surface of the tapered section of screw rod, have the oil hole that is connected with oil duct at the thread section center.
3, high-strength accurate expansion pivot pin according to claim 1 and 2 is characterized in that: expansion sleeve and screw rod tapered section precision-fit, described oil duct is shape in the shape of a spiral.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620136856 CN200946616Y (en) | 2006-04-26 | 2006-09-12 | High intensity precise expansion axle pin |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200620020672 | 2006-04-26 | ||
| CN200620020672.X | 2006-04-26 | ||
| CN 200620136856 CN200946616Y (en) | 2006-04-26 | 2006-09-12 | High intensity precise expansion axle pin |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200946616Y true CN200946616Y (en) | 2007-09-12 |
Family
ID=38733677
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620136856 Expired - Lifetime CN200946616Y (en) | 2006-04-26 | 2006-09-12 | High intensity precise expansion axle pin |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN200946616Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105196119A (en) * | 2015-10-09 | 2015-12-30 | 江阴江顺精密机械零部件有限公司 | Grinder core rod |
| CN107448457A (en) * | 2017-07-31 | 2017-12-08 | 太仓市众翔精密五金有限公司 | A kind of stud being easily installed |
| CN107477065A (en) * | 2017-07-31 | 2017-12-15 | 太仓市众翔精密五金有限公司 | A kind of wear-resistant stud of resistance to greasy dirt |
| CN108999859A (en) * | 2018-07-26 | 2018-12-14 | 河北国源电气股份有限公司 | A kind of shaft coupling hydraulic bolt and its application method |
| CN110043541A (en) * | 2019-05-07 | 2019-07-23 | 哈尔滨工程大学 | A kind of bolt device of cylinder block swelling damping |
-
2006
- 2006-09-12 CN CN 200620136856 patent/CN200946616Y/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105196119A (en) * | 2015-10-09 | 2015-12-30 | 江阴江顺精密机械零部件有限公司 | Grinder core rod |
| CN107448457A (en) * | 2017-07-31 | 2017-12-08 | 太仓市众翔精密五金有限公司 | A kind of stud being easily installed |
| CN107477065A (en) * | 2017-07-31 | 2017-12-15 | 太仓市众翔精密五金有限公司 | A kind of wear-resistant stud of resistance to greasy dirt |
| CN108999859A (en) * | 2018-07-26 | 2018-12-14 | 河北国源电气股份有限公司 | A kind of shaft coupling hydraulic bolt and its application method |
| CN110043541A (en) * | 2019-05-07 | 2019-07-23 | 哈尔滨工程大学 | A kind of bolt device of cylinder block swelling damping |
| CN110043541B (en) * | 2019-05-07 | 2024-05-17 | 哈尔滨工程大学 | Bolt device for expanding and damping cylinder body |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20070912 |
|
| EXPY | Termination of patent right or utility model |