CN106641244A - Detachable piston rod joint and forming method thereof - Google Patents
Detachable piston rod joint and forming method thereof Download PDFInfo
- Publication number
- CN106641244A CN106641244A CN201510731675.8A CN201510731675A CN106641244A CN 106641244 A CN106641244 A CN 106641244A CN 201510731675 A CN201510731675 A CN 201510731675A CN 106641244 A CN106641244 A CN 106641244A
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- CN
- China
- Prior art keywords
- connector
- piston rod
- detached type
- type piston
- rod attachment
- 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.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 17
- 239000012530 fluid Substances 0.000 claims description 15
- 239000000463 material Substances 0.000 claims description 11
- 230000002787 reinforcement Effects 0.000 claims description 10
- 238000003754 machining Methods 0.000 claims description 9
- 239000013013 elastic material Substances 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- 239000004696 Poly ether ether ketone Substances 0.000 claims description 4
- 238000001746 injection moulding Methods 0.000 claims description 4
- 229920002530 polyetherether ketone Polymers 0.000 claims description 4
- 229920000491 Polyphenylsulfone Polymers 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 3
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 3
- 238000010276 construction Methods 0.000 claims description 2
- 239000004033 plastic Substances 0.000 claims description 2
- 229920003023 plastic Polymers 0.000 claims description 2
- 238000005728 strengthening Methods 0.000 claims description 2
- 230000003014 reinforcing effect Effects 0.000 abstract 3
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 6
- 230000008569 process Effects 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 229920006351 engineering plastic Polymers 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- -1 polyphenylene Polymers 0.000 description 2
- 229920000265 Polyparaphenylene Polymers 0.000 description 1
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- RTZKZFJDLAIYFH-UHFFFAOYSA-N ether Substances CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000005865 ionizing radiation Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 150000007522 mineralic acids Chemical class 0.000 description 1
- 230000000116 mitigating effect Effects 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
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- 229950000845 politef Drugs 0.000 description 1
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- 239000004416 thermosoftening plastic Substances 0.000 description 1
Landscapes
- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
The invention provides a detachable piston rod joint and a forming method of the detachable piston rod joint. The detachable piston rod joint comprises a connecting piece, a piston ring and a connecting head detachably connected with the piston rod. The connecting piece is sleeved with the piston ring and is tightly combined with the connecting head. One tail end of the connecting piece is of a baffle type structure, a first clamping piece tightly combined with the piston ring is arranged at the tail end of the connecting piece, and a second clamping piece tightly combined with the connecting piece is arranged at the other tail end of the connecting piece. The detachable piston rod joint further comprises a reinforcing connecting piece. The connecting piece is sleeved with the reinforcing connecting piece, and the reinforcing connecting piece is tightly combined with the connecting head and located between the connecting head and the piston ring. The detachable piston rod joint is simple and practical in structure, low in cost and easy to machine and manufacture.
Description
Technical field
The present application relates to a kind of detached type piston rod attachment and its forming method, can be applicable to medical treatment and set
In standby.
Background technology
Formula structure is often made of one between piston rod common at present and piston or is connected by pin, needed
It is very inconvenient when maintenance or dismounting；A kind of attachment means are disclosed in prior art, using the union joint
Tighten up when outer surface is pressurized, the connecting rod for putting in attachment means can be compressed, while union joint leading portion is provided with
Back-off structure, can effectively prevent connecting rod from coming off.
Must assure that to work in terms of due to piston selection to have enough under high temperature, high pressure, high-load condition
Intensity, rigidity, while its coefficient of friction between piston cavity is as little as possible, while will also ensure temperature
During degree change, own dimensions, change of shape are little, and minimum gap will be kept and between piston cavity,
Therefore costly, if overall adopt such material, cost is high for the material price general charged selected.And
And conventional piston structure makes piston portion bear high pressure, in turn result in its between piston cavity frictional force compared with
Greatly, it is more easy to wear.
The content of the invention
The present patent application is for the above-mentioned deficiency in the presence of current piston rod and piston coupling structure
Place, there is provided a kind of to be easy to piston rod to be connected piston rod attachment and its forming method with dismounting with piston.
One purpose of the present patent application is to provide a kind of detached type piston rod attachment, including connector, work
Plug ring and the union joint with piston rod detachable connection, piston ring set outside connector, connector be connected
Head is combined closely.
Further, the end of the connector is provided with baffle plate, bears most of pressure in piston, makes fluid
Remake with the gap of piston cavity by connector and used on piston ring.
Further, the first screens combined closely with piston ring is respectively equipped with the connector, and is connected
The second screens that part is combined closely.
Further, the connector is metal, enables flow through the gap of metal connecting piece and piston cavity
Remake and use on piston ring, while playing a part of effective support to piston ring and mitigating its materials'use.
Further, the piston ring be elastic material, its physical dimension be more than plunger shaft internal diameter, so exist
During advancing to piston intracavity, inwardly extruding is tightened up at piston piece edge, and decrement makes which be adjacent to plunger shaft
Inwall, sealing effectiveness are more preferable.
Further, the piston ring is provided with free empennage near the end of connector, empennage be connected
There is between part fluid passage, empennage is adjacent to into piston cavity wall during fluid flows through fluid passage.So set
Meter, is to strut empennage Jing after connector end for fluid, it is ensured that sealing effectiveness.
Further, the piston ring is coordinated with connector and is adjacent to or integral by being molded.
Further, the detached type piston rod attachment also includes strengthening connector, strengthens connector and is enclosed within
Outside connector, between union joint and piston ring, and combine closely with union joint.
Further, the reinforcement connector strengthens connector and/or connector by being located at connector
On attachment structure be closely engaged.
Further, the attachment structure includes screw thread or groove structure, the reinforcement connector be connected
Part passes through screw thread or groove is closely engaged.
Further, the reinforcement connector is provided with the 3rd screens combined closely with union joint.
Reinforcement connector is selectable unit, by being engaged with the tight of connector, is mainly used in：First, to work
Plug ring plays pressuring action, second, increasing a screens, more effectively prevents union joint from coming off.
Further, the union joint is the elastic construction that can gather and open.
Further, be provided with can be with the 4th screens of piston rod detachable connection for the union joint.
Further, the union joint stretches out several snap finger, barb or the back-offs that can gather and open, the
Four screens are located at the end of snap finger, barb or back-off.
Further, the union joint be elastic material, its physical dimension be more than plunger shaft internal diameter, so exist
During piston is advanced to piston intracavity, union joint inwardly extrudes gathering, so as to the clamping to piston rod is imitated
Fruit is more preferably.
Another purpose of the present patent application is to provide the forming method of above-mentioned detached type piston rod attachment, bag
Include following steps：
1st, machining piston ring；
2nd, the precedence for processing connector, step 1 and step 2 can be exchanged, as needed can be even
Corresponding screens or/and attachment structure are processed on fitting；
3rd, by piston ring, first side loads connector from childhood；
4th, connector and piston ring that formation is processed in above-mentioned steps are molded as mold insert, the company of being formed
Joint.
Further, can process and strengthen connector after step 3, and load reinforcement connection on connector
Part, piston ring is further compressed.
Further, the 3rd screens can be processed on connector is strengthened.
Further, in step 1, machining piston ring can adopt machining mode or adopt injection mo(u)lding
Mode.
Further, PTFE, PPSU, polyether-ether-ketone (PEEK) are included using the material of injection molding
Or modified polyetheretherketonefiber.
PTFE is called " politef ", and this material is with resistant to elevated temperatures feature, its friction system
Number is extremely low；PPSU is called " polyphenylene sulphone resin ", is novel thermoplastic engineering plastic, rigidity and
Good toughness, heatproof, resistance to thermal oxide, creep-resistant property are excellent, inorganic acid resistance, alkali, the corrosion of saline solution,
Resistance to ionizing radiation, it is nontoxic, insulating properties and self-extinguishment it is good, easy processing and forming；PEEK is called " polyethers ether
Ketone ", is a kind of special engineering plastics of excellent performance, with more aobvious compared with other special engineering plastics
Work advantage, 260 degree of high temperature resistant, mechanical performance are excellent, self lubricity is good, chemicals-resistant burn into is fire-retardant.
Further, in step 4, the injected plastics material includes PE, PP or PVC.
Detached type piston rod attachment described in the present patent application is simple and practical, low cost, and processes system
Make easy, connector plays baffle effect, bears most of pressure, enables flow through connector and plunger shaft
The gap of body remakes uses on piston ring, and connector plays effective support and mitigates its material simultaneously to piston ring
The effect for using；Strengthen connector pressuring action is played to piston ring, by increase screens, more effectively
Prevent union joint from coming off；The design of piston ring empennage, then serve and further strengthen sealing by fluid itself
Effect.
Description of the drawings
Side views of the Fig. 1 for detached type piston rod attachment one embodiment described in the present patent application；
Axial section structures of the Fig. 2 for detached type piston rod attachment one embodiment described in the present patent application
Schematic diagram；
Top views of the Fig. 3 for Fig. 1 embodiments；
Fundamental diagrams of the Fig. 4-6 for detached type piston rod attachment one embodiment described in the present patent application；
Fig. 7 is the mplifying structure schematic diagram of local A in Fig. 5；
Wherein, 1 connector, 10 be baffle-type structure, 2 be piston ring, 20 be empennage, 21 be fluid
Passage, 3 for strengthen connector, 4 be union joint, 40 be snap finger, 51 be the first screens, 52 be second
Screens, 53 be the 3rd screens, 54 be the 4th screens, 6 be piston rod, 7 be attachment structure, 8 be piston
Chamber.
Specific embodiment
Technical scheme described in the present patent application is described without limitation below in conjunction with accompanying drawing, it is therefore an objective to be
The public more fully understands the technology contents.
Embodiment one
As Figure 1-3, be detached type piston rod attachment described in the present patent application one embodiment
Structure chart, in this embodiment, described detached type piston rod attachment include connector 1, piston ring 2,
Strengthen connector 3 and the union joint 4 with piston rod detachable connection, piston ring 2 is enclosed within outside connector 1,
Connector 1 is combined closely with union joint 4, and connector 1 is metal material, and an end is baffle-type structure
10, the first screens 51 combined closely with piston ring 2 is provided with the end, another end is provided with and connects
The second screens 52 that fitting 4 is combined closely, strengthens connector 3 and is enclosed within outside connector 1, positioned at connection
Between 4 and piston ring 2, and combined closely by the 3rd screens 53 with union joint 4, and by connection
Structure 7 (being screw thread herein) is closely engaged with connector 1, the union joint 4 stretch out several can gather and
The snap finger 40 (can also be barb or back-off) opened, snap finger 40 is provided with and the 4th screens 54 and piston
The connection of bar detached type.
The connector 1 is metal connecting piece, plays baffle effect, bears most of pressure, leads to fluid
The gap for crossing metal connecting piece and piston cavity remakes and uses on piston ring 2, and metal connecting piece is simultaneously to piston
Ring plays a part of effective support and mitigates its materials'use.Reinforcement connector 3 is selectable unit, to piston ring
2 play pressuring action, additionally by a screens is increased, more effectively prevent coming off for union joint 4.
During use, piston rod 6 is inserted in union joint 4, it is during advancing into plunger shaft 8, living
Plug 8 internal diameter of chamber diminishes, and union joint 4 gathers piston rod 6, and promotes piston inwardly to move；Work as piston rod
6 when pulling out, and pulls piston to move out by the screens with union joint 4, until exit plunger shaft
8 internal diameter expands, and union joint 4 unclamps, and piston rod 6 can be departed from union joint 4, so as to realize piston
Reciprocating motion and shirk with piston.
Embodiment two
As shown in figs. 4-7, in this embodiment, detached type piston rod attachment includes connector 1, piston
Ring 2, strengthen connector 3 and union joint 4, piston ring 2 is enclosed within outside connector 1, connector 1 with even
Joint 4 is combined closely, and 1 end of connector is baffle-type structure 10, is provided with and piston ring 2 in the end
The first screens 51 combined closely, another end are provided with the second screens 52 combined closely with connector 4,
Strengthen connector 3 to be enclosed within outside connector 1, between union joint 4 and piston ring 2, and and union joint
4 are combined closely by the 3rd screens 53, and are closely engaged with connector 1 by attachment structure 7, described
Union joint 4 stretches out the several snap fingers 40 that can gather and open, snap finger 40 be provided with the 4th screens 54 with
The connection of piston rod detached type.
In the present embodiment, the piston ring 2 be elastic material, its physical dimension be more than 8 internal diameter of plunger shaft,
And piston ring 2 is provided with free empennage 20 near the end of connector 1, between empennage 20 and connector 1
With fluid passage 21, empennage is adjacent to into piston cavity wall (such as Fig. 7 arrows during fluid flows through fluid passage
It is shown).So design, be empennage to be strutted Jing after connector end for fluid, it is ensured that sealing effect
Really.Likewise, the union joint 1 is elastic material, its physical dimension is more than 8 internal diameter of plunger shaft, so
During piston is advanced to piston intracavity, union joint 1 inwardly draw in by extruding, so as to piston rod 5
Clamping effect it is more preferable.
Described in the present patent application, the forming method of detached type piston rod attachment, comprises the steps：
1st, machining piston ring, machining piston ring can adopt machining mode or adopt injection molding；
2nd, the precedence for processing connector, step 1 and step 2 can be exchanged, as needed can be even
Corresponding screens or/and screw thread are processed on fitting；
3rd, by piston ring, first side loads connector from childhood；Can process and strengthen connector after step 3,
And load reinforcement connector on connector, piston ring is further compressed, can be processed on connector is strengthened
Corresponding positions；
4th, connector and piston ring that formation is processed in above-mentioned steps are molded as mold insert, the company of being formed
Joint, can process snap finger and corresponding screens on union joint.
It should be understood that the above includes that accompanying drawing is not the restriction to the technical scheme, in fact,
Under identical or approximate principle, the improvement carried out by the technical scheme, including Each part shape,
Size, material used, and the equivalent of essentially identical functional structure, all required by the present patent application
Within the technical scheme of protection.
Claims (21)
1. a kind of detached type piston rod attachment, it is characterised in that：Including connector, piston ring and and piston
The union joint of bar detachable connection, piston ring set outside connector, combined closely with union joint by connector.
2. detached type piston rod attachment according to claim 1, it is characterised in that：The connector
End be provided with baffle plate, bear in piston most of pressure, enable flow through between connector and piston cavity
Gap remakes to be used on piston ring.
3. detached type piston rod attachment according to claim 1 and 2, it is characterised in that：The company
The first screens combined closely with piston ring is respectively equipped with fitting, the second screens combined closely with connector.
4. detached type piston rod attachment according to claim 1 and 2, it is characterised in that：The company
Fitting is metal.
5. detached type piston rod attachment according to claim 1 and 2, it is characterised in that：The work
Plug ring is elastic material, and its physical dimension is more than plunger shaft internal diameter.
6. detached type piston rod attachment according to claim 5, it is characterised in that：The piston ring
End near connector is provided with free empennage, has fluid passage, fluid stream between empennage and connector
Empennage is adjacent to into piston cavity wall during Jing fluid passages.
7. detached type piston rod attachment according to claim 1 and 2, it is characterised in that：The work
Plug ring is adjacent to connector cooperation or integral by being molded.
8. detached type piston rod attachment according to claim 1 and 2, it is characterised in that：It is described can
Dismountable type piston rod attachment also includes strengthening connector, strengthens connector and is enclosed within outside connector, positioned at connection
Between head and piston ring, and combine closely with union joint.
9. detached type piston rod attachment according to claim 8, it is characterised in that：It is described to strengthen connecting
Fitting is closely engaged by the attachment structure on reinforcement connector and/or connector with connector.
10. detached type piston rod attachment according to claim 9, it is characterised in that：The connection
Structure includes screw thread or groove structure, and the reinforcement connector passes through screw thread with connector or groove is closely engaged.
11. detached type piston rod attachments according to claim 8 or claim 9, it is characterised in that：It is described to add
Strong ties part is provided with the 3rd screens combined closely with union joint.
12. detached type piston rod attachments according to claim 1 and 2, it is characterised in that：It is described
Union joint is the elastic construction that can gather and open.
13. detached type piston rod attachments according to claim 1 and 2, it is characterised in that：It is described
Union joint is provided with can be with the 4th screens of piston rod detachable connection.
14. detached type piston rod attachments according to claim 13, it is characterised in that：The connection
Head stretches out several snap finger, barb or the back-offs that can gather and open, and the 4th screens is located at snap finger, barb or falls
The end of button.
15. detached type piston rod attachments according to claim 1 and 2, it is characterised in that：It is described
Union joint is elastic material, and its physical dimension is more than plunger shaft internal diameter.
The forming method of detached type piston rod attachment described in 16. claim 1-15, it is characterised in that bag
Include following steps：
1) machining piston ring；
2) connector, step 1 are processed) and step 2) precedence can exchange, as needed can be
Corresponding screens or/and attachment structure are processed on connector；
3) by piston ring, first side loads connector from childhood；
4) connector and piston ring that formation is processed in above-mentioned steps are molded as mold insert, are formed connection
Head.
17. according to claim 16 detached type piston rod attachment forming method, it is characterised in that：
In step 3) after, connector is strengthened in processing, and loads reinforcement connector on connector, and piston ring is entered one
Step is compressed.
18. according to claim 17 detached type piston rod attachment forming method, it is characterised in that：
The 3rd screens is processed on connector is strengthened.
19. according to claim 16 detached type piston rod attachment forming method, it is characterised in that：
In step 1) in, machining piston ring can adopt machining mode or adopt injection molding.
20. according to claim 19 detached type piston rod attachment forming method, it is characterised in that：
PTFE, PPSU, polyether-ether-ketone or modified polyetheretherketonefiber are included using the material of injection molding.
21. according to claim 16 detached type piston rod attachment forming method, it is characterised in that：
In step 4) in, the injected plastics material includes PE, PP or PVC.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510731675.8A CN106641244A (en) | 2015-10-30 | 2015-10-30 | Detachable piston rod joint and forming method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510731675.8A CN106641244A (en) | 2015-10-30 | 2015-10-30 | Detachable piston rod joint and forming method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106641244A true CN106641244A (en) | 2017-05-10 |
Family
ID=58809704
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510731675.8A Pending CN106641244A (en) | 2015-10-30 | 2015-10-30 | Detachable piston rod joint and forming method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106641244A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018058758A1 (en) * | 2016-09-27 | 2018-04-05 | 惠州科赛医疗有限公司 | Piston structure |
| CN110219925A (en) * | 2019-07-02 | 2019-09-10 | 河海大学常州校区 | A kind of high-speed rail contact line damper |
| CN110219924A (en) * | 2019-07-02 | 2019-09-10 | 河海大学常州校区 | A kind of high-speed rail contact line damper |
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| CN202646677U (en) * | 2012-06-27 | 2013-01-02 | 中联重科股份有限公司 | Connecting device for piston and piston rod and piston assembly comprising same |
| CN103316404A (en) * | 2007-06-04 | 2013-09-25 | 贝克顿·迪金森公司 | Positive displacement stopper for a pre-filled syringe |
| CN103533976A (en) * | 2011-03-28 | 2014-01-22 | 贝克顿·迪金森公司 | Plastic stopper |
| CN104127939A (en) * | 2014-05-21 | 2014-11-05 | 金富康 | Injector with detachable core rod |
| CN104265619A (en) * | 2014-09-30 | 2015-01-07 | 罗凤玲 | Medical high-pressure pump |
| US20150209521A1 (en) * | 2014-01-29 | 2015-07-30 | Becton, Dickinson And Company | Plunger Assembly Including a Plunger Rod for Advancing a Stopper Through a Syringe |
| CN205064832U (en) * | 2015-10-30 | 2016-03-02 | 罗凤玲 | Can shirk formula piston rod connects |
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| CN103316404A (en) * | 2007-06-04 | 2013-09-25 | 贝克顿·迪金森公司 | Positive displacement stopper for a pre-filled syringe |
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| US20150209521A1 (en) * | 2014-01-29 | 2015-07-30 | Becton, Dickinson And Company | Plunger Assembly Including a Plunger Rod for Advancing a Stopper Through a Syringe |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018058758A1 (en) * | 2016-09-27 | 2018-04-05 | 惠州科赛医疗有限公司 | Piston structure |
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| CN110219924A (en) * | 2019-07-02 | 2019-09-10 | 河海大学常州校区 | A kind of high-speed rail contact line damper |
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Application publication date: 20170510 |