CN102889196B - A kind of threaded connecting structure of differential piston - Google Patents
A kind of threaded connecting structure of differential piston Download PDFInfo
- Publication number
- CN102889196B CN102889196B CN201210380897.6A CN201210380897A CN102889196B CN 102889196 B CN102889196 B CN 102889196B CN 201210380897 A CN201210380897 A CN 201210380897A CN 102889196 B CN102889196 B CN 102889196B
- Authority
- CN
- China
- Prior art keywords
- piston
- locking nut
- piston rod
- connecting structure
- outer hexagon
- 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.)
- Active
Links
Landscapes
- Pistons, Piston Rings, And Cylinders (AREA)
- Compressor (AREA)
Abstract
The invention discloses a kind of threaded connecting structure of differential piston, for the step piston in piston compressor, including piston, piston rod, locking nut, steel pad, outer hexagon and allen wrench, it is characterized in that, the position being connected on the piston rod with piston is provided with screw thread, and the screw thread that locking nut is provided with internal thread, piston rod matches with the design of locking nut internal thread, and diameter is equal, steel pad is provided between piston and the shaft shoulder, piston and locking nut respectively.By technical scheme there is provided a kind of simple structure, install and operational condition is not harsh, safeguard the bindiny mechanism of the easy and durable step piston of adjustment.
Description
Technical field
The present invention relates to mechanical connecting device technical field, step piston in piston compressor is particularly used for
Bindiny mechanism.
Background technology
At present, many connected modes using step piston structure, in the prior art step piston in piston compressor
It common are double-spherical floating connection or needle bearing connection coordinate shaft sealer to use.Patent CN1793648 compressors are double
Spherical floating connecting structure, the double-spherical floating connection technical characteristics disclosed, hiigh pressure stage piston is adopted with low-pressure stage piston
With being rigidly connected, low-pressure piston bar is mounted in low-pressure stage piston cavity, and its technical characteristic is by concave surface ball pad and convex surface ball pad set
One group of sphere is constituted on hiigh pressure stage piston rod, convex surface ball pad is installed in low-pressure stage piston cavity and ball pad composition in concave surface is another
One group of sphere, equipped with tune between low-pressure stage piston and concave surface ball pad and convex surface ball pad, convex surface ball pad and concave surface ball pad composition sphere
The whole series, the differential piston of the double-spherical floating connecting structure can guarantee that the exact linearity of piston rod and piston movement, reduce
The abrasion of hiigh pressure stage cylinder jacket and piston.Patent CN201027612 full-oil-free lubrication step piston type air compressors are then disclosed
Its step piston uses needle bearing, sealing ring and piston pin connection.
And be commonly interference fitted compared with the connected mode of low-pressure stage piston and piston rod, although avoid cooperation between part
Gap is excessive to cause easy to fall off or fit clearance is too small to cause assembling difficult, but during actual hot charging, there is also installation
The harsh defect of condition：On the one hand, due to the material of rigid connector such as piston and piston rod, size, the magnitude of interference, heating temperature
Degree, the difference of heat time, can cause piston rods bend to deform, so that the problems such as causing failure or even scrap；On the other hand, exist
The factors such as during compressor operating, inertia force is excessive, cylinder operation temperature is too high, gas pressure pulsation, can cause piston to take off
Fall, or even equipment is out of service, causes certain economic loss.
The content of the invention
The invention aims to overcome drawbacks described above in the prior art and not enough there is provided a kind of simple structure, install and
Operational condition is not harsh, safeguard the bindiny mechanism of the easy and durable step piston of adjustment.Important innovation also exists
In, although common two-way ram is also tightened using locking nut with piston rod, and two-way ram is fixed on piston rod end,
It is solid to tighten the outer hexagon of locking nut.By contrast, outer hexagon of the present invention be it is hollow, outside
Hexagon can reach step piston through piston rod, it is achieved thereby that the fastening of step piston and piston rod.
The present invention is achieved by the following technical solutions：
A kind of threaded connecting structure of differential piston, including piston, piston rod, locking nut, outer hexagon and interior six
Square head wrench, it is characterised in that the position being connected on the piston rod with piston is provided with screw thread, locking nut is provided with internal thread.Piston
Screw thread on bar matches with the design of locking nut internal thread, and diameter is equal.Piston and the shaft shoulder, piston and locking nut it
Between be provided with steel pad.
When piston is steel material, steel pad can be cancelled between piston and the shaft shoulder, piston and locking nut.
When locking nut and outer hexagon equal with its diameter through piston pole length, using allen wrench and outside
Hexagon is combined locking nut screwing.
Brief description of the drawings
Fig. 1 is the structural representation for being interference fitted attachment means；
Fig. 2 is a kind of structural representation of screw-type step piston connected mode of the invention；
Fig. 3 is the structural representation of locking nut in the present invention；
Fig. 4 is the structural representation of China and foreign countries' hexagon of the present invention；
Fig. 5 is the structural representation of allen wrench in the present invention；
In accompanying drawing 1,1 piston, 2 piston rods；
In accompanying drawing 2,1 piston, 2 piston rods, 3 locking nuts, 4 steel pads, 5 outer hexagons and 6 allen wrench.
Embodiment
1 and Fig. 2 makes to the specific embodiment of the invention below in conjunction with the accompanying drawings is explained further：
Preferentially, a kind of screw-type step piston connected mode of the invention, including piston 1, piston rod 2, locking nut 3,
Steel pad 4, outer hexagon 5 and allen wrench 6, it is characterised in that the position being connected on piston rod 2 with piston 1 is provided with spiral shell
Line, locking nut 3 is provided with internal thread.
Screw thread in the present invention on piston rod 2 matches with the internal thread design on locking nut 3, and two kinds of diameters of thread
It is equal.
The present invention is provided with several steel pads 4 between piston 1 and the shaft shoulder, piston 1 and locking nut 3.
When piston 1 is steel material, steel pad 4 can be cancelled between piston 1 and the shaft shoulder, piston 1 and locking nut 3.
When locking nut 3 and outer hexagon 5 equal with its diameter through piston pole length, using allen wrench 6
It is combined with outer hexagon 5 and tightens locking nut 3.
Wherein, in implementation process, diameter of piston rod is 1.125 inches, with the screw thread of Piston connecting portion position for 1.25 "-
12UNF (U.S. unifies screw thread, closely-pitched), the internal thread of locking nut is 1.25 " -12UNF, and path is 1.1598 ".Outer six side pulls
The diameter of bore of hand is also slightly larger than 1.125 inches, when locking nut and outer hexagon are through 1.125 inches of diameter of piston rod
During position, locking nut 3 is tightened using allen wrench 6 and outer hexagon 5.
Further, when piston 1 is using aluminum material, set between piston 1 and the shaft shoulder, piston 1 and locking nut 3
Steel pad 4.If the material of piston 1 is steel, steel pad 4 can be saved.
Above-described embodiment is used to explain technical scheme, but is not used as limitation of the invention, except above-mentioned reality
Apply exception, the present invention can also have other embodiments, all in the range of the inner characteristic of the present invention, using equivalent substitution or
The technical scheme of equivalent transformation, all falls within the protection domain of the claims in the present invention.
Claims (2)
1. a kind of threaded connecting structure of differential piston, including it is piston (1), piston rod (2), locking nut (3), steel pad (4), outer
Hexagon (5) and allen wrench (6), it is characterised in that the position being connected on piston rod (2) with piston (1) is provided with spiral shell
Line, the screw thread that locking nut is provided with internal thread, piston rod (2) matches with the design of locking nut internal thread, and diameter is equal,
Several steel pads (4) are provided between piston (1) and the shaft shoulder, piston and locking nut；
Described outer hexagon (5) is hollow, when locking nut (3) and outer hexagon (5) pass through the length of piston rod (2)
When degree is equal with its diameter, it is combined using allen wrench (6) and outer hexagon (5) and tightens locking nut (3).
2. a kind of threaded connecting structure of differential piston according to claim 1, it is characterised in that when piston (1) is steel
Steel pad (4) can be cancelled during material, between piston and the shaft shoulder, piston and locking nut.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210380897.6A CN102889196B (en) | 2012-10-09 | 2012-10-10 | A kind of threaded connecting structure of differential piston |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210379179.7 | 2012-10-09 | ||
| CN2012103791797 | 2012-10-09 | ||
| CN201210379179 | 2012-10-09 | ||
| CN201210380897.6A CN102889196B (en) | 2012-10-09 | 2012-10-10 | A kind of threaded connecting structure of differential piston |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102889196A CN102889196A (en) | 2013-01-23 |
| CN102889196B true CN102889196B (en) | 2017-10-20 |
Family
ID=47532829
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210380897.6A Active CN102889196B (en) | 2012-10-09 | 2012-10-10 | A kind of threaded connecting structure of differential piston |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102889196B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112049791A (en) * | 2020-09-22 | 2020-12-08 | 西南石油大学 | Plunger of oil-well pump without traveling valve |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT1229654B (en) * | 1989-04-21 | 1991-09-06 | Nuovo Pignone Spa | CROSS HEAD PERFECTED FOR ALTERNATIVE PISTON MACHINES, IN PARTICULAR FOR ALTERNATIVE COMPRESSORS. |
| CN201474907U (en) * | 2009-08-27 | 2010-05-19 | 自贡通达机器制造有限公司 | Differential piston for compressor |
| CN202047966U (en) * | 2011-04-28 | 2011-11-23 | 沈阳远大压缩机股份有限公司 | Fastening structure for connecting a piston body and a piston rod |
| CN202300919U (en) * | 2011-11-07 | 2012-07-04 | 重庆气体压缩机厂有限责任公司 | Guide piston structure |
| CN202883311U (en) * | 2012-10-09 | 2013-04-17 | 天津凯德实业有限公司 | Thread type differential piston connecting structure |
-
2012
- 2012-10-10 CN CN201210380897.6A patent/CN102889196B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN102889196A (en) | 2013-01-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104368967B (en) | Device capable of adjusting and measuring pretightening force loss of ball screw pair and experiment table of device | |
| CN102889196B (en) | A kind of threaded connecting structure of differential piston | |
| CN201050652Y (en) | Self-tightening type flange | |
| CN106351936A (en) | Axially compressed looseproof fastening device | |
| CN202883311U (en) | Thread type differential piston connecting structure | |
| CN201363354Y (en) | Hydraulic fitting bolt | |
| CN204512120U (en) | Connect bearing pin | |
| CN101813098A (en) | Connecting structure for compressor impeller and rotor spindle of turbocharger | |
| CN212003889U (en) | Inner hexagonal and outer hexagonal screw | |
| CN209296192U (en) | A kind of snap ring-type force sensor being easily installed with replacement | |
| CN102235501B (en) | Repeatedly-demountable channel sealing device | |
| CN201871906U (en) | Spring compression tooling | |
| CN203067219U (en) | Self-locking type anti-looseness structure for connecting piston rod and crosshead body of compressor | |
| CN206160980U (en) | Servo mechanism displacement sensor mounting structure | |
| CN210371528U (en) | Bolt type pin shaft pair | |
| CN107843431A (en) | A kind of contact axle box bearing sensor | |
| CN106981803B (en) | But spacing revolution mechanic | |
| CN208751787U (en) | A kind of quick-locking mechanism for pressure gauge test | |
| CN208996462U (en) | Pneumatic tamping machine | |
| CN208058001U (en) | A kind of cast steel fixing ball valve | |
| CN204942691U (en) | A kind of ball valve end cover structure | |
| CN112610693B (en) | Method for sealing ultrahigh pressure test vessel | |
| CN215389890U (en) | Pull rod pressure device of medium speed coal mill | |
| CN217669119U (en) | Hydraulic pressure suit formula balance drum extracting tool | |
| CN211920867U (en) | Balance arm of lower-mounted crane pipe |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |