CN202047966U - Fastening structure for connecting a piston body and a piston rod - Google Patents
Fastening structure for connecting a piston body and a piston rod Download PDFInfo
- Publication number
- CN202047966U CN202047966U CN2011201289148U CN201120128914U CN202047966U CN 202047966 U CN202047966 U CN 202047966U CN 2011201289148 U CN2011201289148 U CN 2011201289148U CN 201120128914 U CN201120128914 U CN 201120128914U CN 202047966 U CN202047966 U CN 202047966U
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- piston
- piston rod
- nut
- piston body
- rod
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- Expired - Fee Related
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Abstract
The utility model provides a fastening structure for connecting a piston body and a piston rod, aims to solve the problem that: in prior arts, the front end of a piston rod is screw shaped and is passed through a piston body, then a piston nut is screwed into the piston rod to fasten the piston body and the piston rod together; that method has a low reliability and only can be applied in small-sized compressor units. The fastening structure of the utility model is mainly characterized in that: a plurality of axial screw holes are formed on the nut body; a terminal strand is disposed in each screw hole; firstly, a ring shaped gasket is placed into the nut hole sinking of the piston body, the front head of the piston rod is inserted into the piston body, then the piston nut is screwed into the front head of the piston rod; when the piston nut sinks into the nut hole sinking of the piston body, the terminal strands are screwed into the screw holes of the piston nut one by one. The reaction force applied on the terminal strands by the piston body makes an elastic deformation on the piston rod, consequently generates a pre-tightening force; thereby the piston body, the piston rod and the piston nut are connected into one piece without dropping off.
Description
Technical field
The utility model relates to the fastening structure that a kind of piston body is connected with piston rod.
Background technique
Piston is one of reciprocal compressor important component part of carrying out gas compression, thereby piston is also particularly important with being connected of piston rod.The locking method of state's inner piston rod and piston mainly contains three kinds at present:
The one, the piston rod front is shape of threads, after piston body is passed in the piston rod front, plain nut is screwed into before the piston rod on the head thread, and piston body and piston rod are tightened together.The shortcoming of this kind locking method is that reliability is low, is mainly used in the light duty compressor group.
The 2nd, adopt electric heating to carry out fastening, in piston rod front end processing electric heating hole, produce resiliently deformable when utilizing electrical heating rod to make piston rod and piston unt fastening, and then generation pretightening force, piston rod and piston are connected as one, having a few of this kind method than first method, owing to can calculate the piston unt Tightening moment, can accurately calculate the elongation of piston rod, so the fastening reliability of piston rod improves greatly, can be widely used in the large-scale compressor unit, but because the electric heating hole processes the thinnest place at piston rod just, one of dangerous rupture cross section of piston rod just is so can produce certain influence to the intensity of piston rod.
The 3rd, piston rod adopts hydraulic pressure to be connected with piston, this kind method is utilized the incompressibility of liquid, suppresses to piston rod by oil pump and specific hydraulic fastened tools, makes piston rod produce resiliently deformable, and then the generation pretightening force, to reach the reliable purpose of connecting of piston rod and piston body.This kind method and second method are relatively, under the reliability of same fastening ability, do not need in piston rod the thinnest place boring, just can the intensity of piston rod not exerted an influence yet, has improved the Security of piston rod, but shortcoming be need specialty suppress oil pump and special tool, and special tool is nonstandard instrument, need custom-made, increased manufacture cost, and versatility is low.
Summary of the invention
For solving the problems of the technologies described above, the fastening structure that provides a kind of piston body to be connected with piston rod is provided the purpose of this utility model.
The purpose of this utility model is achieved in that it has piston unt, piston body and piston rod thereof, is characterized in that: said piston unt is, nut body several screws are axially arranged, each screw is provided with jackscrew; Annular shim and piston unt are successively placed in the nut counterbore of piston body.During assembling, earlier annular shim is put in the nut counterbore, piston body is inserted in the piston rod front, use special tool that piston unt is screwed into piston rod, after treating that piston unt sinks to the nut counterbore of piston body, again each jackscrew is screwed in one by one in each screw of piston unt, after evenly fastening, jackscrew front end compress gasket, the reaction force that piston body imposes on jackscrew makes piston rod generation resiliently deformable and then produces pretightening force, realize that piston body, piston rod and piston unt three connect as one, and can not come off.
Compared with prior art, the beneficial effects of the utility model are:
One, the Tightening moment of piston unt jackscrew can accurately calculate, thereby the Tightening moment that is assigned to each jackscrew can learn accurately that also the installation reliability height is installed simple;
Two, do not need in piston rod front end boring, it is the thinnest also just to greatly reduce piston rod, and the danger that place, boring back intensity reduces improves the Security of piston rod;
Three, the procedure of minimizing piston rod needn't be holed at front end, saves man-hour, cuts down finished cost;
Four, the special tool when fastening is a torque spanner, and purchase is convenient, and stronger versatility is arranged, and low cost reduces greatly in just feasible manufacturing and the installation process;
Five, piston unt axial direction size is little, and conserve space has reduced the clearance in the cylinder.
Description of drawings
Further specify the utility model below in conjunction with accompanying drawing.
Fig. 1 is a structural representation of the present utility model.
Embodiment
It has piston unt 1, piston body 2 and piston rod 4 thereof, and said piston unt is, nut body several screws are axially arranged, each screw has jackscrew 6; Annular shim 5 and piston unt are successively placed in the piston body nut counterbore.During assembling, earlier annular shim is put in the piston body nut counterbore, piston body is inserted in the piston rod front, use special tool that piston unt is screwed into piston rod, after treating that piston unt sinks to piston body nut counterbore, again each jackscrew is screwed in one by one in each screw of piston unt, after evenly fastening, jackscrew front end compress gasket, the reaction force that piston body imposes on jackscrew makes piston rod generation resiliently deformable and then produces pretightening force, realize that piston body, piston rod and piston unt three connect as one, and can not come off.
The 3rd, positioning key.
Claims (1)
1. fastening structure that piston body is connected with piston rod, it has piston unt, piston body and piston rod thereof, it is characterized in that: said piston unt is, nut body several screws are axially arranged, each screw is provided with jackscrew; Annular shim and piston unt are put in the nut counterbore of piston body successively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201289148U CN202047966U (en) | 2011-04-28 | 2011-04-28 | Fastening structure for connecting a piston body and a piston rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201289148U CN202047966U (en) | 2011-04-28 | 2011-04-28 | Fastening structure for connecting a piston body and a piston rod |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202047966U true CN202047966U (en) | 2011-11-23 |
Family
ID=44988277
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201289148U Expired - Fee Related CN202047966U (en) | 2011-04-28 | 2011-04-28 | Fastening structure for connecting a piston body and a piston rod |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202047966U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102673739A (en) * | 2012-05-26 | 2012-09-19 | 中国水利水电第十三工程局有限公司橡塑制品厂 | Plastic anchor floater |
| CN102889196A (en) * | 2012-10-09 | 2013-01-23 | 天津凯德实业有限公司 | Threaded connecting structure of differential piston |
| CN104329238A (en) * | 2013-07-22 | 2015-02-04 | 海尔集团公司 | Linear compressor and piston thereof |
| CN114001017A (en) * | 2021-08-31 | 2022-02-01 | 佛山市天然气高压管网有限公司 | Diaphragm compressor cylinder with clamp and jackscrew |
-
2011
- 2011-04-28 CN CN2011201289148U patent/CN202047966U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102673739A (en) * | 2012-05-26 | 2012-09-19 | 中国水利水电第十三工程局有限公司橡塑制品厂 | Plastic anchor floater |
| CN102889196A (en) * | 2012-10-09 | 2013-01-23 | 天津凯德实业有限公司 | Threaded connecting structure of differential piston |
| CN104329238A (en) * | 2013-07-22 | 2015-02-04 | 海尔集团公司 | Linear compressor and piston thereof |
| CN104329238B (en) * | 2013-07-22 | 2018-01-09 | 青岛海尔智能技术研发有限公司 | The piston of linear compressor and linear compressor |
| CN114001017A (en) * | 2021-08-31 | 2022-02-01 | 佛山市天然气高压管网有限公司 | Diaphragm compressor cylinder with clamp and jackscrew |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 110141 No. 1, Hai Lu, Shenyang economic and Technological Development Zone, Liaoning, China Patentee after: Shenyang Yuanda Compressor Co., Ltd. Address before: 110141 No. 1, Hai Lu, Shenyang economic and Technological Development Zone, Liaoning, China Patentee before: Shenyang Yuanda Compressor Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111123 Termination date: 20170428 |