CN205064832U - Can shirk formula piston rod connects - Google Patents
Can shirk formula piston rod connects Download PDFInfo
- Publication number
- CN205064832U CN205064832U CN201520863160.9U CN201520863160U CN205064832U CN 205064832 U CN205064832 U CN 205064832U CN 201520863160 U CN201520863160 U CN 201520863160U CN 205064832 U CN205064832 U CN 205064832U
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- China
- Prior art keywords
- piston rod
- link
- detached type
- connecting head
- type piston
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Abstract
The utility model provides a can shirk formula piston rod connects, including connecting piece, piston ring and can shirking the connector of being connected with the piston rod, the piston ring cover is outside at the connecting piece, and the connecting piece is combined closely with the connector. An end of connecting piece is the overhead paddle structure, is equipped with the first screens of combining closely with the piston ring at this end, and another end is equipped with the second screens of combining closely with the connecting piece. Can shirk formula piston rod connects still includes reinforced company's union piece, and reinforced company's union piece cover is outside at the connecting piece, and combines closely with the connector, is located between connector and the piston ring. The utility model discloses the application can shirk formula piston rod connects simple structure practical, with low costs, and the processing preparation is easy.
Description
Technical field
The utility model relates to a kind of detached type piston rod attachment, can be applicable in medical equipment.
Background technique
Piston rod common at present be often made of one formula structure between piston or be connected by pin, very inconvenient when needing repairing or dismantle; Disclose a kind of connection set in prior art, utilize during the outer surface pressurized of this connecting head and tighten up, the connecting rod putting in connection set can be compressed, connecting head leading portion is provided with back-off structure simultaneously, can effectively prevent connecting rod from coming off.
Because piston selection aspect must ensure to work under high temperature, high pressure, high-load condition to have enough intensity, rigidity, friction factor simultaneously between itself and piston cavity is little as far as possible, when also will ensure temperature variation simultaneously, own dimensions, change in shape are little, and and piston cavity between will gap minimally, therefore costly, if entirety all adopts such material, cost is high for the material price general charged selected.And conventional piston structure makes piston portion bear high pressure, and then cause frictional force between itself and piston cavity comparatively large, more easy to wear.
Model utility content
Namely the utility model is for above-mentioned deficiency existing in current piston rod and piston coupling structure, provides a kind of piston rod of being convenient to be connected the piston rod attachment with dismounting with piston.
A kind of detached type piston rod attachment described in the utility model, comprises link, piston ring and the connecting head with piston rod detachable connection, and piston ring set is outside at link, and link and connecting head are combined closely.
Further, the end of described link is provided with baffle plate, bears most of pressure in piston, fluid is remake by the gap of link and piston cavity and uses on piston ring.
Further, described link is respectively equipped with first screens of combining closely with piston ring, second screens of combining closely with link.
Further, described link is metal, fluid is remake by the gap of metal connecting piece and piston cavity and uses on piston ring, piston ring is played to the effect effectively supporting and alleviate its materials'use simultaneously.
Further, described piston ring is elastic material, and its physical dimension is greater than piston cavity internal diameter, and like this in the process advanced in piston cavity, piston piece edge inwardly extrudes and tightens up, and decrement makes it be adjacent to piston cavity inwall, and sealing effect is better.
Further, described piston ring is provided with free empennage near the end of link, has fluid passage between empennage and link, during fluid flows through fluid passage, empennage is adjacent to piston cavity inwall.Design so, is in order to empennage struts by fluid after link end, ensure that sealing effect.
Further, described piston ring coordinate with link be adjacent to or by be molded into one.
Further, described detached type piston rod attachment also comprises reinforced company's fitting, and reinforced company's fitting is enclosed within link outside, between connecting head and piston ring, and combines closely with connecting head.
Further, described reinforced company fitting is closely engaged by the linkage structure be positioned on reinforced company's fitting and/or link with link.
Further, described linkage structure comprises screw thread or groove structure, and described reinforced company fitting is closely engaged by screw thread or groove with link.
Further, described reinforced company fitting is provided with the 3rd screens of combining closely with connecting head.
Reinforced company's fitting is selectable unit, by being engaged with the tight of link, being mainly used in: one, playing pressuring action to piston ring, its two, increase a screens, the more effective connecting head that prevents comes off.
Further, described connecting head is the elastic structure that can gather and open.
Further, described connecting head be provided with can with the 4th screens of piston rod detachable connection.
Further, described connecting head stretches out several button pawl, barb or the back-offs that can gather and open, and the 4th screens is positioned at the end of button pawl, barb or back-off.
Further, described connecting head is elastic material, and its physical dimension is greater than piston cavity internal diameter, and like this in the process that piston advances in piston cavity, connecting head inwardly extrudes gathering, thus better to the clamping effect of piston rod.
The forming method of detached type piston rod attachment described in the utility model, comprises the steps:
1, machining piston ring;
2, process link, the precedence of step 1 and step 2 can be exchanged, and can process corresponding screens or/and linkage structure as required on link;
3, piston ring is loaded link in first side from childhood;
4, the link be processed to form in above-mentioned steps and piston ring are carried out injection moulding as mold insert, form connecting head.
Can after step 3, processing reinforced company fitting, and on link, load reinforced company's fitting, piston ring is compressed further.
The 3rd screens can be processed on reinforced company's fitting.
Machining piston ring can adopt machining mode or adopt injection molding.
The material of injection molding is adopted to comprise PTFE, PPSU, polyether-ether-ketone (PEEK) or modified polyetheretherketonefiber.
PTFE cries again " teflon ", and this material has resistant to elevated temperatures feature, and its friction factor is extremely low; PPSU cries again " polyphenylene sulphone resin ", is novel thermoplastic engineering plastic, rigidity and good toughness, heatproof, resistance to thermal oxidation, creep-resistant property is excellent, the corrosion of inorganic acid resistance, alkali, salt solution, resistance to ionizing radiation, nontoxic, insulating properties and self-extinguish ability good, easy shaping operation; PEEK cries again " polyether-ether-ketone ", is a kind of special engineering plastics of excellent performance, has more significant advantages compared with other special engineering plastics, high temperature resistant 260 degree, mechanical property is excellent, self lubricity is good, chemicals-resistant burn into is fire-retardant.
In step 4, described injected plastics material comprises PE, PP or PVC.
Detached type piston rod attachment described in the utility model, simple and practical, cost is low, and processing and fabricating is easy, link plays baffle effect, bear most of pressure, fluid is remake by the gap of link and piston cavity and uses on piston ring, link plays the effect effectively supporting and alleviate its materials'use simultaneously to piston ring; Reinforced company's fitting plays pressuring action to piston ring, and by the screens increased, the more effective connecting head that prevents comes off; The design of piston ring empennage, then serve the effect by the further enhanced leaktightness of fluid itself.
Accompanying drawing explanation
Fig. 1 is the side view of a detached type piston rod attachment described in the utility model embodiment;
Fig. 2 is the axial section structural representation of a detached type piston rod attachment described in the utility model embodiment;
Fig. 3 is the plan view of Fig. 1 embodiment;
Fig. 4-6 is the fundamental diagram of a detached type piston rod attachment described in the utility model embodiment;
Fig. 7 is the structure for amplifying schematic diagram of local A in Fig. 5;
Wherein, 1 link, 10 is baffle-type structure, 2 is piston ring, 20 is empennage, 21 is fluid passage, 3 is reinforced company's fitting, 4 is connecting head, 40 is piston rod for button pawl, 51 be the first screens, 52 be the second screens, 53 be the 3rd screens, 54 is the 4th screens, 6,7 is linkage structure, 8 is piston cavity.
Embodiment
Describe without limitation technological scheme described in the utility model below in conjunction with accompanying drawing, object is in order to the public understands described technology contents better.
Embodiment one
As Figure 1-3, for the structural drawing of an embodiment of detached type piston rod attachment described in the utility model, in this embodiment, described detached type piston rod attachment comprises link 1, piston ring 2, reinforced company's fitting 3 and the connecting head 4 with piston rod detachable connection, it is outside that piston ring 2 is enclosed within link 1, link 1 and connecting head 4 are combined closely, link 1 is metal material, an end is baffle-type structure 10, first screens 51 of combining closely with piston ring 2 is provided with at this end, another end is provided with second screens 52 of combining closely with link 4, it is outside that reinforced company's fitting 3 is enclosed within link 1, between connecting head 4 and piston ring 2, and combined closely by the 3rd screens 53 with connecting head 4, and be closely engaged with link 1 by linkage structure 7 (being screw thread) herein, described connecting head 4 stretches out several the button pawls that can gather and open 40 (also can be barb or back-off), button pawl 40 is provided with and the connection of the 4th screens 54 with piston rod detached type.
Described link 1 is metal connecting piece, play baffle effect, bear most of pressure, fluid is remake by the gap of metal connecting piece and piston cavity and uses on piston ring 2, metal connecting piece plays the effect effectively supporting and alleviate its materials'use simultaneously to piston ring.Reinforced company's fitting 3 is selectable unit, plays pressuring action to piston ring 2, additionally by increase screens, more effectively prevents coming off of connecting head 4.
During use, inserted by piston rod 6 in connecting head 4, in the process advanced in piston cavity 8, piston cavity 8 internal diameter diminishes, and connecting head 4 gathers piston rod 6, and promotes piston and inwardly move; When piston rod 6 pulls out, by pulling piston outwards to move with the screens of connecting head 4, until the internal diameter of outlet port piston cavity 8 expands, connecting head 4 unclamps, and piston rod 6 can depart from connecting head 4, thus realize piston to-and-fro motion and with the shirking of piston.
Embodiment two
As shown in figs. 4-7, in this embodiment, detached type piston rod attachment comprises link 1, piston ring 2, reinforced company's fitting 3 and connecting head 4, it is outside that piston ring 2 is enclosed within link 1, link 1 and connecting head 4 are combined closely, link 1 end is baffle-type structure 10, first screens 51 of combining closely with piston ring 2 is provided with at this end, another end is provided with second screens 52 of combining closely with link 4, it is outside that reinforced company's fitting 3 is enclosed within link 1, between connecting head 4 and piston ring 2, and combined closely by the 3rd screens 53 with connecting head 4, and be closely engaged with link 1 by linkage structure 7, described connecting head 4 stretches out several the button pawls 40 that can gather and open, button pawl 40 is provided with and the connection of the 4th screens 54 with piston rod detached type.
In the present embodiment, described piston ring 2 is elastic material, its physical dimension is greater than piston cavity 8 internal diameter, and piston ring 2 is provided with free empennage 20 near the end of link 1, there is between empennage 20 and link 1 fluid passage 21, during fluid flows through fluid passage, empennage is adjacent to piston cavity inwall (as shown in Fig. 7 arrow).Design so, is in order to empennage struts by fluid after link end, ensure that sealing effect.Same, described connecting head 1 is elastic material, and its physical dimension is greater than piston cavity 8 internal diameter, and like this in the process that piston advances in piston cavity, connecting head 1 inwardly extrudes gathering, thus better to the clamping effect of piston rod 5.
It should be understood that; it is not restriction to described technological scheme that foregoing comprises accompanying drawing; in fact; under identical or approximate principle; to the improvement that described technological scheme is carried out; comprise the shape of Each part, size, material used, and the equivalent replacement of basic identical function structure, all within the utility model technological scheme required for protection.
Claims (15)
1. a detached type piston rod attachment, is characterized in that: comprise link, piston ring and the connecting head with piston rod detachable connection, and piston ring set is outside at link, and link and connecting head are combined closely.
2. detached type piston rod attachment according to claim 1, is characterized in that: the end of described link is provided with baffle plate, bears most of pressure in piston, fluid is remake by the gap of link and piston cavity and uses on piston ring.
3. detached type piston rod attachment according to claim 1 and 2, is characterized in that: described link is respectively equipped with first screens of combining closely with piston ring, second screens of combining closely with link.
4. detached type piston rod attachment according to claim 1 and 2, is characterized in that: described link is metal.
5. detached type piston rod attachment according to claim 1 and 2, is characterized in that: described piston ring is elastic material, and its physical dimension is greater than piston cavity internal diameter.
6. detached type piston rod attachment according to claim 5, it is characterized in that: described piston ring is provided with free empennage near the end of link, between empennage and link, there is fluid passage, during fluid flows through fluid passage, empennage is adjacent to piston cavity inwall.
7. detached type piston rod attachment according to claim 1 and 2, is characterized in that: described piston ring coordinate with link be adjacent to or by be molded into one.
8. detached type piston rod attachment according to claim 1 and 2, it is characterized in that: described detached type piston rod attachment also comprises reinforced company's fitting, reinforced company's fitting is enclosed within link outside, between connecting head and piston ring, and combines closely with connecting head.
9. detached type piston rod attachment according to claim 8, is characterized in that: described reinforced company fitting is closely engaged by the linkage structure be positioned on reinforced company's fitting and/or link with link.
10. detached type piston rod attachment according to claim 9, is characterized in that: described linkage structure comprises screw thread or groove structure, described reinforced company fitting is closely engaged by screw thread or groove with link.
11. detached type piston rod attachments according to claim 8 or claim 9, is characterized in that: described reinforced company fitting is provided with the 3rd screens of combining closely with connecting head.
12. detached type piston rod attachments according to claim 1 and 2, is characterized in that: described connecting head is the elastic structure that can gather and open.
13. detached type piston rod attachments according to claim 1 and 2, is characterized in that: described connecting head be provided with can with the 4th screens of piston rod detachable connection.
14. detached type piston rod attachments according to claim 13, is characterized in that: described connecting head stretches out several button pawl, barb or the back-offs that can gather and open, and the 4th screens is positioned at the end of button pawl, barb or back-off.
15. detached type piston rod attachments according to claim 1 and 2, is characterized in that: described connecting head is elastic material, and its physical dimension is greater than piston cavity internal diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520863160.9U CN205064832U (en) | 2015-10-30 | 2015-10-30 | Can shirk formula piston rod connects |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520863160.9U CN205064832U (en) | 2015-10-30 | 2015-10-30 | Can shirk formula piston rod connects |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205064832U true CN205064832U (en) | 2016-03-02 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520863160.9U Active CN205064832U (en) | 2015-10-30 | 2015-10-30 | Can shirk formula piston rod connects |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205064832U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106641244A (en) * | 2015-10-30 | 2017-05-10 | 罗凤玲 | Detachable piston rod joint and forming method thereof |
| WO2018058758A1 (en) * | 2016-09-27 | 2018-04-05 | 惠州科赛医疗有限公司 | Piston structure |
-
2015
- 2015-10-30 CN CN201520863160.9U patent/CN205064832U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106641244A (en) * | 2015-10-30 | 2017-05-10 | 罗凤玲 | Detachable piston rod joint and forming method thereof |
| WO2018058758A1 (en) * | 2016-09-27 | 2018-04-05 | 惠州科赛医疗有限公司 | Piston structure |
| CN107882983A (en) * | 2016-09-27 | 2018-04-06 | 惠州科赛医疗有限公司 | A kind of piston structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20180613 Address after: 516083 Longshan seven road, Dayawan, west of Dayawan, Guangdong Patentee after: Huizhou best medical Co., Ltd. Address before: 516081 Dayawan Avenue, Dayawan District, Huizhou, Guangdong 228 Patentee before: Luo Fengling |
|
| TR01 | Transfer of patent right |