CN208123056U - A kind of elastic piston connection structure, high-pressure pumping system - Google Patents
A kind of elastic piston connection structure, high-pressure pumping system Download PDFInfo
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- CN208123056U CN208123056U CN201820381927.8U CN201820381927U CN208123056U CN 208123056 U CN208123056 U CN 208123056U CN 201820381927 U CN201820381927 U CN 201820381927U CN 208123056 U CN208123056 U CN 208123056U
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- piston
- blind hole
- connection structure
- flange
- elastic piston
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Abstract
The utility model discloses a kind of elastic piston connection structures, high-pressure pumping system, elastic piston connection structure includes the flexible piston only being received in piston cavity wall and the connecting elements being fixedly connected with push rod, the rear side end wall of the piston only is recessed blind hole, the connecting elements has the connecting rod in insertion blind hole, the outer rim of the connecting rod has the flange of radially outwardly projecting, the outer diameter of the flange is greater than the internal diameter of blind hole, in this elastic piston connection structure, the flange of connection boom end, which is buckled in blind hole, forms back-off structure, so that forming firm connection between connecting elements and piston only, it is linked and packed and is simple and efficient；Moreover, also efficiently avoiding conventional coupling arrangement because the techniques such as bonding, welding, welding generate the possibility of pollutant, the application risk of medical instrument is reduced.
Description
Technical field
The utility model relates to medical equipment technical field, in particular to a kind of elastic piston connection structure is pumped by
System.
Background technique
In the medical high-pressure pumping system of the prior art, piston is usually cylindrical piston, and piston receiver is simultaneously slidably connected
In piston cavity wall, piston reciprocating is mobile to be supplied to power, and fluid is made to be pumped into and leave pump chamber.Piston is pushed away by push rod
Draw it is mobile keep piston reciprocating mobile, piston as being also attached by a rigid connector between flexible member, with push rod,
In the prior art connection type common between flexible member and rigid member be mainly screw connection, it is Nian Jie, weld, welding and
Interference fit connection etc., it is cumbersome all to there is assembly and connection in above-mentioned connection type, needs the problems such as assisting using particular tool.
Utility model content
The technical problem to be solved by the utility model is to provide a kind of structures, and elastic piston simple, easy to assembly connects
Structure, the high-pressure pumping system with the elastic piston connection structure.
Used technical solution to solve above-mentioned technical problem：A kind of elastic piston connection structure, including it is received in work
The connecting elements filling in the flexible piston only in cavity wall and being fixedly connected with push rod, the rear side end wall of the piston only
It is recessed blind hole, the connecting elements has the connecting rod in insertion blind hole, and the outer rim of the connecting rod has radially outward
The flange of protrusion, the outer diameter of the flange are greater than the internal diameter of blind hole.
Preferably, the cross sectional shape of the flange is triangle or quadrangle.
Preferably, the bottom end face in the blind hole is plane, the contact face of the connection boom end and bottom end face
For plane.
Preferably, annular groove is equipped on the side wall of the blind hole.
Preferably, annular groove is equipped in the sidewall bottom of the blind hole.
Preferably, the flange and annular groove are fitting to connection.
Preferably, it is respectively formed front side skew wall and rear side skew wall with rear side on front side of the circumferential side wall of the piston only, with
Sunk area is constituted at the circumferential side wall central region of piston only.
Used technical solution to solve above-mentioned technical problem：A kind of high-pressure pumping system, including above-mentioned yielding movable
Fill in connection structure.
Beneficial effect：In this elastic piston connection structure, the outer diameter for connecting the flange of boom end is greater than the blind of piston only
The internal diameter in hole so that flange is buckled in blind hole and is squeezed and deformed blind hole inner wall to form back-off structure so that connecting rod with
Piston only all forms position limiting structure on axially and radially, so that forming firm company between connecting elements and piston only
It connects, can avoid connecting rod during piston motion and fallen off with piston only, and this is linked and packed and is simple and efficient；Moreover,
Conventional coupling arrangement is also efficiently avoided because the techniques such as bonding, welding, welding generate the possibility of pollutant, reduces Medical treatment device
The application risk of tool.
Detailed description of the invention
The utility model is described further with reference to the accompanying drawings and examples；
Fig. 1 is the structural schematic diagram of the utility model embodiment；
Fig. 2 is the partial profile structure of the utility model embodiment.
Specific embodiment
Referring to Figures 1 and 2, the utility model elastic piston connection structure is received in piston cavity wall including elasticity
Piston only 10 and the connecting elements 20 being connected with 10 rear end of piston only, wherein connecting elements 20 is connected with push rod, pushes away
Bar moves back and forth, and then piston only 10 is driven to move back and forth.
The rear side end wall of piston only 10 is recessed blind hole 11, and blind hole 11 is cylinder, the end axis of connecting elements 20
Form connecting rod 21 to stretching, connecting rod 21 is also cylindrical, the diameter of connecting rod 21 be slightly larger than or equal to blind hole 11 diameter,
Connecting rod 21 is embedded in blind hole 11, and the end outer rim of connecting rod 21 protrusion that extends radially outwardly forms flange 22, flange 22 it is straight
Diameter is greater than the preferably diameter of blind hole 11, is buckled in blind hole 11 by flange 22 and is squeezed and deformed 11 inner wall of blind hole to form back-off
Structure, so that forming firm connection between connecting elements 20 and piston only 10.Preferably, it is equipped in blind hole 11 for flange 22
Chimeric annular groove 12, the cross sectional shape of flange 22 can be designed as triangle, quadrangle etc., correspondingly, annular groove 12
Shape be also adaptively adjusted.Certainly, blind hole 11 or smooth straight cylindrical bore do not have annular groove
12。
Wherein, the bottom end face in blind hole 11 is plane, correspondingly, the contact face of connecting rod 21 end and bottom end face
It also is plane.By connecting rod 21 drive piston only 10 in being moved forward and backward in piston cavity wall specific as follows, 21 end of connecting rod
Contact face contact with the bottom end face of the blind hole 11 of piston only 10 to push piston only to move forward, it is preferable that even
The contact face of 21 end of extension bar bears pressure and is less than or equal to 400MPa；The flange 22 of 21 end of connecting rod is embedding by back-off structure
It closes and piston only 10 is pulled to move backward, it is preferable that when piston only 10 moves backward, the vacuum degree generated in plunger shaft is 0
To -0.1Mpa.
Preferably, front side skew wall 13 and rear side skew wall are respectively formed on front side of the circumferential side wall of piston only 10 with rear side
14, due to the setting of front side skew wall 13 and rear side skew wall 14, depressed area can be constituted in the circumferential side wall central region of piston only
Domain 15, when piston only 10 is received in piston cavity wall, the central region of piston only 10 is not formed with piston cavity wall to be connect
Touching, wherein the maximum gauge of front side skew wall 13 is greater than the diameter of piston cavity wall, and maximum gauge refers to front side skew wall 13 towards work
End diameter on front side of plug body, so that piston only is received in piston cavity wall, front side skew wall 13 can be with piston cavity wall
Wall surface forms elasticity and supports contact, and 14 end of rear side skew wall, which outwardly protrudes extension, has protrusion 16, and the maximum gauge of protrusion 16 is big
In the diameter of piston cavity wall, so that piston only is received in piston cavity wall, 16 energy of protrusion and piston on rear side skew wall 14
The wall surface of cavity wall forms elasticity and supports contact.
Due to the presence of sunk area 15, so that 10 rear section of piston only has biggish elasticity in radial directions
Deflection, when connecting rod 21 is embedded in the blind hole 11 of piston only 10,10 rear section of piston only can be radially outward local
Generate subtle flow, enable the flange 22 of 21 end of connecting rod is very well, be rapidly embedded in blind hole 11 annular it is recessed
In slot 12；When 10 elasticity of piston only is received in piston cavity wall, due to the protrusion 16 and piston cavity wall of rear side skew wall 14
Elasticity supports contact, so that the compression of 10 rear section of piston only is deformed radially inwardly, and then clamps and holds connecting rod 21 tightly, thus
So that piston only 10 is more securely connected to form one with connecting elements 20.
The utility model high-pressure pumping system, including above-mentioned elastic piston connection structure.
The embodiments of the present invention is explained in detail above in conjunction with attached drawing, but the utility model is not limited to
State embodiment, within the scope of knowledge possessed by those of ordinary skill in the art, can also do not depart from it is practical
Various changes can be made under the premise of novel objective.
Claims (8)
1. a kind of elastic piston connection structure, it is characterised in that：Including the flexible piston sheet being received in piston cavity wall
Body and the connecting elements being fixedly connected with push rod, the rear side end wall of the piston only are recessed blind hole, the connecting elements
With the connecting rod in insertion blind hole, the outer rim of the connecting rod has the flange of radially outwardly projecting, the outer diameter of the flange
Greater than the internal diameter of blind hole.
2. elastic piston connection structure according to claim 1, it is characterised in that：The cross sectional shape of the flange is triangle
Shape or quadrangle.
3. elastic piston connection structure according to claim 1, it is characterised in that：Bottom end face in the blind hole is flat
The contact face of face, the connection boom end and bottom end face is plane.
4. elastic piston connection structure according to claim 1, it is characterised in that：Ring is equipped on the side wall of the blind hole
Connected in star.
5. elastic piston connection structure according to claim 4, it is characterised in that：It is equipped in the sidewall bottom of the blind hole
Annular groove.
6. elastic piston connection structure according to claim 4 or 5, it is characterised in that：The flange and annular groove are embedding
Close connection.
7. elastic piston connection structure according to claim 1, it is characterised in that：Before the circumferential side wall of the piston only
Side and rear side are respectively formed front side skew wall and rear side skew wall, to be constituted depressed area at the circumferential side wall central region of piston only
Domain.
8. a kind of high-pressure pumping system, it is characterised in that：It connects and ties including elastic piston described in claim 1-7 any one
Structure.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2018202543082 | 2018-02-12 | ||
| CN201820254308 | 2018-02-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208123056U true CN208123056U (en) | 2018-11-20 |
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ID=64199547
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820381927.8U Active CN208123056U (en) | 2018-02-12 | 2018-03-20 | A kind of elastic piston connection structure, high-pressure pumping system |
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|---|---|
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108591047A (en) * | 2018-02-12 | 2018-09-28 | 惠州海卓科赛医疗有限公司 | A kind of elastic piston connection structure, high-pressure pumping system and method |
| CN117108476A (en) * | 2023-10-24 | 2023-11-24 | 自贡诺力斯百盛压缩机有限公司 | Variable-frequency gas compressor |
-
2018
- 2018-03-20 CN CN201820381927.8U patent/CN208123056U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108591047A (en) * | 2018-02-12 | 2018-09-28 | 惠州海卓科赛医疗有限公司 | A kind of elastic piston connection structure, high-pressure pumping system and method |
| WO2019179199A1 (en) * | 2018-02-12 | 2019-09-26 | 惠州海卓科赛医疗有限公司 | Elastic piston connecting structure, and high-pressure pumping system and method |
| CN117108476A (en) * | 2023-10-24 | 2023-11-24 | 自贡诺力斯百盛压缩机有限公司 | Variable-frequency gas compressor |
| CN117108476B (en) * | 2023-10-24 | 2024-01-23 | 自贡诺力斯百盛压缩机有限公司 | Variable-frequency gas compressor |
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