CN201810550U - Plunger pair - Google Patents
Plunger pair Download PDFInfo
- Publication number
- CN201810550U CN201810550U CN2010205531165U CN201020553116U CN201810550U CN 201810550 U CN201810550 U CN 201810550U CN 2010205531165 U CN2010205531165 U CN 2010205531165U CN 201020553116 U CN201020553116 U CN 201020553116U CN 201810550 U CN201810550 U CN 201810550U
- Authority
- CN
- China
- Prior art keywords
- oil outlet
- plunger
- steel ball
- conical spring
- hole
- 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.)
- Expired - Fee Related
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Abstract
The utility model relates to a plunger pair. The plunger pair comprises a plunger 1 and a plunger sleeve 2 and also comprises a conical spring 3 and a steel ball 4, wherein an oil cavity 2.1 is reserved in the plunger sleeve 2; an oil outlet hole 2.2 is reserved on the side surface of the plunger sleeve 2; the oil outlet hole 2.2 is a conical hole with smaller inside and larger outside; a channel 2.3 connected with the oil cavity 2.1 is reserved at the small-hole end of the oil outlet hole 2.2; a limiting step 2.4 which can limit the conical spring 3 in the oil outlet hole 2.2 is arranged at the large-hole end of the oil outlet hole 2.2; the large end of the conical spring 3 is pressed against the step surface of the limiting step 2.4; the small end is pressed against the steel ball 4; and the steel ball 4 is pressed against the small hole of the oil outlet hole 2.2 at the same time. The plunger pair adopting the structure has a good seal effect, is low in cost and simple in assembly, and is reusable.
Description
Technical field:
The utility model relates to Hydraulic power tools, specifically is a kind of trunk piston set that is used for plunger pump.
Background technique:
Trunk piston set is the element in the plunger pump, present trunk piston set generally comprises plunger, plunger bushing, spring and two spring seats, be provided with oil pocket in the described plunger bushing, one of described two spring seat are linked on the excircle of plunger, another is installed on the excircle of plunger bushing, the two ends of spring offset with two spring seats respectively, described plunger under the effect of oil pressure with the plunger bushing sliding fit, and by described spring reset, the side of plunger bushing is provided with oil outlet, be provided with outlet valve in the oil outlet, the oil outlet of plunger bushing side is multistage step hole in the prior art, outlet valve comprises valve seat from inside to outside successively, valve plate, Returnning spring and valve bonnet, they successively close-fitting in through hole.Adopt the trunk piston set of this structure, following deficiency arranged:
1, outlet valve adopts valve plate to carry out linear sealing, and sealing effect is relatively poor.
2, each part of outlet valve all needs to adopt pressure facility to compress into when assembling, the assembling trouble, and easily part is damaged by pressure, assembly yield is lower, and, cause trunk piston set disposablely to use because the just wearing and tearing easily of the part of outlet valve itself can't be changed after the wearing and tearing.
3, the part of outlet valve itself is also more, and assembling is trouble also, causes cost higher.
The model utility content:
The technical problems to be solved in the utility model is, overcomes existing technological deficiency, provides a kind of good sealing effect, assembling is simple, cost is low and reused trunk piston set.
Technical solution of the present utility model is, a kind of trunk piston set is provided, it comprises plunger and plunger bushing, be provided with oil pocket in the described plunger bushing, described plunger bushing side is provided with oil outlet, it also comprises conical spring and steel ball, described oil outlet is inner small and outside big cone shape hole, the small bore end of described oil outlet is provided with the passage that is connected with oil pocket, the big nose end of described oil outlet is provided with can be with the spacing limited step in described oil outlet of described conical spring, the step surface of the big end of described conical spring and limited step (2.4) offsets, and small end and described steel ball offset, and the aperture of steel ball while with oil outlet offsets.
After adopting said structure, the utlity model has following advantage:
1, adopt ball valve to seal, sealing effect is better.
2, adopt part less, only need during installation earlier steel ball to be put into the hole, again conical spring is gone to get final product by the limited step precession, assembly manipulation is very simple, and success rate is higher, and because simple in structure, only need during dismounting spring is ticked and get final product with hook, very convenient, if steel ball weares and teares more for a long time, can change at any time, reach nonexpondable purpose.
3, adopt part less, assemble also comparatively simply, so labor intensive, material resources are all seldom, cost is lower.
Description of drawings:
Accompanying drawing is the structural representation of the utility model trunk piston set;
Wherein, 1, plunger, 2, plunger bushing, 2.1, oil pocket, 2.2, oil outlet, 2.3, passage, 2.4, limited step, 3, conical spring, 4, steel ball.
Embodiment:
Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.
As shown in the figure: the utility model provides a kind of trunk piston set with following structure, it comprises plunger 1 and plunger bushing 2, be provided with oil pocket 2.1 in the described plunger bushing 2, described plunger bushing 2 sides are provided with oil outlet 2.2, it also comprises conical spring 3 and steel ball 4, described oil outlet 2.2 is inner small and outside big cone shape hole, the small bore end of described oil outlet 2.2 is provided with the passage 2.3 that is connected with oil pocket 2.1, the big nose end of described oil outlet 2.2 is provided with can be with described conical spring 3 spacing limited steps 2.4 in described oil outlet 2.2, the big end of described conical spring 3 and the step surface of limited step 2.4 offset, small end and described steel ball 4 offset, and the aperture of 4 whiles of steel ball with oil outlet 2.2 offsets.
Working principle of the present utility model is, steel ball 4 during work is fuel-displaced from oil outlet because the oil pressure in the oil pocket 2.1 is backed down, fuel-displaced after, the pressure by conical spring 3 resets again.During assembling, existing steel ball 4 is put into oil outlet 2.2, and then with conical spring 3 precession oil outlets 2.2, after precession is gone fully, the big end of conical spring 3 will be limited step 2.4 spacing.Assemble very simple.
Claims (1)
1. trunk piston set, it comprises plunger (1) and plunger bushing (2), be provided with oil pocket (2.1) in the described plunger bushing (2), described plunger bushing (2) side is provided with oil outlet (2.2), it is characterized in that: it also comprises conical spring (3) and steel ball (4), described oil outlet (2.2) is inner small and outside big cone shape hole, the small bore end of described oil outlet (2.2) is provided with the passage (2.3) that is connected with oil pocket (2.1), the big nose end of described oil outlet (2.2) is provided with can be with the spacing limited step (2.4) in described oil outlet (2.2) of described conical spring (3), the step surface of the big end of described conical spring (3) and limited step (2.4) offsets, small end and described steel ball (4) offset, and the aperture of steel ball (4) while with oil outlet (2.2) offsets.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205531165U CN201810550U (en) | 2010-09-28 | 2010-09-28 | Plunger pair |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205531165U CN201810550U (en) | 2010-09-28 | 2010-09-28 | Plunger pair |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201810550U true CN201810550U (en) | 2011-04-27 |
Family
ID=43893492
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205531165U Expired - Fee Related CN201810550U (en) | 2010-09-28 | 2010-09-28 | Plunger pair |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201810550U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102287364A (en) * | 2011-08-25 | 2011-12-21 | 宁波赛维思机械有限公司 | Sealing device for outlet valve of plunger pair |
-
2010
- 2010-09-28 CN CN2010205531165U patent/CN201810550U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102287364A (en) * | 2011-08-25 | 2011-12-21 | 宁波赛维思机械有限公司 | Sealing device for outlet valve of plunger pair |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110427 Termination date: 20140928 |
|
| EXPY | Termination of patent right or utility model |