CN204784290U - Piston structure - Google Patents
Piston structure Download PDFInfo
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- CN204784290U CN204784290U CN201520340530.0U CN201520340530U CN204784290U CN 204784290 U CN204784290 U CN 204784290U CN 201520340530 U CN201520340530 U CN 201520340530U CN 204784290 U CN204784290 U CN 204784290U
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- piston
- ring
- groove
- annular
- interference fit
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Abstract
The utility model discloses a piston structure, including the pump body, piston, piston rod and leather cup, the inside piston chamber that is equipped with of the pump body, the piston rod inlays in the recess of locating on the piston through the spheric end, be equipped with the annular in the periphery of hinge joint piston rod one end, install the piston ring in the annular, the piston ring is made by flexible material, the inner circle and the annular interference fit of piston ring, the outer lane and the piston chamber interference fit of piston ring. The utility model discloses a piston structure and since periphery in hinge joint piston rod one end set up with piston chamber interference fit's flexible piston ring, when the piston rod produced the slope, the piston ring was as the resilient mounting, prevented the trend that the piston production inclines, so avoid piston and the intermural production rigidity of piston intracavity to grind partially to piston structure's sealed effect and life have been promoted.
Description
Technical field
The utility model relates to a kind of piston structure.
Background technique
A kind of clutch slave cylinder piston structure conventional in the market as shown in Figure 1, comprises the pump housing 1, piston 2 and piston rod 3.Wherein one end of piston 2 is provided with leather cup 6, piston 2 is provided with groove 4 with the end face of leather cup 6 opposite side, piston rod 3 is spheric end 5 with the connecting end of piston 2, and shape and the spheric end 5 of groove 4 match, and piston rod 3 is embedded at by spheric end 5 in the groove 4 on piston 2.In addition, as shown in Figure 2, existing piston 2 connects the periphery, one end of piston rod 3 and piston cavity 8 and contactless, and gap is larger.This piston in the course of the work, mounting center and disengaging yoke center bigger than normal, the axis of piston rod 3 can depart from the axis of piston cavity, and now, piston 2 has the trend of inclination under the reaction of piston rod 3, and lateral force between piston 2 and piston cavity can obviously increase.Owing to being rigidity friction between piston and the pump housing, in excessive unidirectional lateral force situation, long-term to-and-fro motion, will inevitably cause wearing and tearing to pump housing internal surface, and occur pit, cause the seal failure of this piston structure, produces the fault of leakage of oil, oil impregnate.
Summary of the invention
The technical problems to be solved in the utility model solves the easy seal failure of prior art piston structure, produces the defect of leakage of oil, oil impregnate fault.
In order to solve the problems of the technologies described above, the technological scheme that the utility model provides is as follows: a kind of piston structure, comprise the pump housing, piston, piston rod and leather cup, described pump body is provided with piston cavity, described piston rod is embedded in the groove on piston by spheric end, the periphery that described piston connects piston rod one end is provided with annular groove, in described annular groove, piston ring is installed, described piston ring is made up of flexible material, the inner ring of described piston ring and annular groove interference fit, the outer ring of described piston ring and piston cavity interference fit.
Further, the periphery of described piston ring is provided with at least two annular projections, the projection of described ring-type and piston cavity interference fit, forms grease groove, described grease groove and piston cavity Spielpassung between adjacent two annular projections.
Further, lubricant oil or lubricating grease is provided with in described grease groove.
Further, described groove holding the port that spheric end enters is uncovered form, and the diameter on the arbitrary shaft section of described port is more than or equal to the maximum diameter of spheric end.
Further, the material of described piston ring is at least one in rubber, plastics, teflon or PA66 nylon+16%MoS2.
Piston structure of the present utility model, because the periphery connecting piston rod one end at piston is provided with the flexible plunger ring with piston cavity interference fit, when piston rod produces, piston ring is as flexible support, prevent piston from producing the trend of inclination, so avoid producing rigidity eccentric wear between piston and piston cavity inwall, thus improve sealing effect and the working life of piston structure.
Accompanying drawing explanation
Fig. 1 is the structural representation of prior art piston structure;
Fig. 2 is the structural representation of prior art piston;
Fig. 3 is the structural representation of the present embodiment piston structure;
Fig. 4 is the structural representation of the present embodiment piston;
Fig. 5 is the structural representation of piston ring in the present embodiment.
Embodiment
In order to make the purpose of this utility model, technological scheme and advantage clearly understand, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the utility model, and be not used in restriction the utility model.
In description of the present utility model, it should be noted that, unless otherwise clearly defined and limited, term " installation ", " being connected ", " connection " should be interpreted broadly, and such as, can be fixedly connected with, connect integratedly, also can be removably connect; It can be the connection of two element internals; Can be directly be connected, also indirectly can be connected by intermediary, for the ordinary skill in the art, concrete condition can understand the concrete meaning of above-mentioned term in the utility model.
As shown in Figure 3, a kind of piston structure of the present embodiment has made improvement on the basis of existing technology.Illustrated piston structure comprises the pump housing 1, piston 2, piston rod 3 and leather cup 6, is provided with piston cavity 8 in the pump housing 1 inside, and wherein piston rod 3 is embedded in the groove 4 on piston 2 by spheric end 5, the piston structure of said structure and prior art indifference.The improvements of the present embodiment are, as shown in Figure 4, the periphery connecting piston rod 3 one end at piston 2 is provided with annular groove 22, and has installed piston ring 7 in this annular groove 22, this piston ring 7 is by wear-resisting, anticorrosion, and the material with certain flexibility is made.The material of this piston ring 7 is preferably at least one in rubber, plastics, teflon or PA66 nylon+16%MoS2.Wherein PA66 nylon+16%MoS2 is a kind of existing composite material with self-lubricating function, and wherein the accounting of MoS2 is about 16%.
The inner ring of above-mentioned piston ring 7 and annular groove 22 interference fit, outer ring and piston cavity 8 interference fit, the benefit of this structure is, when piston rod produces, piston ring is as flexible support, prevent piston from producing the trend of inclination, so avoid producing rigidity eccentric wear between piston and piston cavity inwall, thus improve sealing effect and the working life of piston structure.
Further, as shown in Figure 5, the periphery of the piston ring 7 of the present embodiment is provided with at least two annular projections 71, this annular projection 71 and piston cavity 8 interference fit, and form grease groove 72 between adjacent two annular projections 71, this grease groove 72 and piston cavity 8 Spielpassung, under assembling condition, in grease groove 72, injection has lubricant oil or lubricating grease.The benefit of this structure is, lubricant oil or lubricating grease lubricate all the time to the rubbing surface between piston ring and piston cavity, although piston ring and piston cavity interference fit, but due to the lubrication of lubricant oil or lubricating grease, significantly reduce the surface friction drag between piston ring and piston cavity, avoid the wearing and tearing of piston ring simultaneously, increase the sealing life of piston structure.
Meanwhile, when piston rod tilts, multiple annular projection forms multiple flexible support, is disperseed by the tilting force that piston rod produces, further strengthens the effect of flexible support, avoids piston to produce the trend of inclination.As preferably, the piston ring of the present embodiment is provided with two annular projections, and is arranged at the two ends of piston ring.
Further, as shown in Figure 4, the groove 4 of the present embodiment holding the port 41 that spheric end 5 enters is uncovered form, and the diameter on the arbitrary shaft section of this port 41 is more than or equal to the maximum diameter of spheric end 5.This improvement is the improvement for making relative to the piston of prior art shown in Fig. 2 upper groove, and as shown in Figure 2, the port 41 of its groove is reducing form, and its shaft section diameter is less than the maximum diameter of spheric end.In installation process, larger external force need be applied, make the port 41 of groove 4 produce larger distortion, spheric end 5 could be installed.This structure causes great inconvenience to installation, and larger deformation can have a negative impact to the structural strength of piston.And the port 41 of the uncovered form of the present embodiment, then overcome the defect of prior art completely, easy for installation, the structure of piston can not be had an impact, and any adverse influence can not be produced to the usability of piston structure.
In a word; the foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model, all do within spirit of the present utility model and principle any amendment, equivalent to replace and improvement etc., all should be included within protection domain of the present utility model.
Claims (4)
1. a piston structure, comprise the pump housing (1), piston (2), piston rod (3) and leather cup (6), the described pump housing (1) inside is provided with piston cavity (8), described piston rod (3) is embedded in the groove (4) on piston (2) by spheric end (5), it is characterized in that, the periphery that described piston (2) connects piston rod (3) one end is provided with annular groove (22), piston ring (7) is installed in described annular groove (22), described piston ring is made up of flexible material, the inner ring of described piston ring (7) and annular groove (22) interference fit, the outer ring of described piston ring (7) and piston cavity (8) interference fit.
2. according to piston structure according to claim 1, it is characterized in that, the periphery of described piston ring (7) is provided with at least two annular projections (71), described annular projection (71) and piston cavity (8) interference fit, grease groove (72) is formed, described grease groove (72) and piston cavity (8) Spielpassung between adjacent two annular projections (71).
3. according to piston structure according to claim 1, it is characterized in that, in described grease groove (72), be provided with lubricant oil or lubricating grease.
4. according to the piston structure described in any one of claim 1-3, it is characterized in that, described groove (4) holding the port (41) that spheric end (5) enters is uncovered form, and the diameter on described port (41) arbitrary shaft section is more than or equal to the maximum diameter of spheric end (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520340530.0U CN204784290U (en) | 2015-05-25 | 2015-05-25 | Piston structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520340530.0U CN204784290U (en) | 2015-05-25 | 2015-05-25 | Piston structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204784290U true CN204784290U (en) | 2015-11-18 |
Family
ID=54524345
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520340530.0U Active CN204784290U (en) | 2015-05-25 | 2015-05-25 | Piston structure |
Country Status (1)
| Country | Link |
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| CN (1) | CN204784290U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104948606A (en) * | 2015-05-25 | 2015-09-30 | 浙江诸暨万宝机械有限公司 | Piston device |
| CN107031111A (en) * | 2016-12-11 | 2017-08-11 | 安徽海拓志永智能装备股份有限公司 | A kind of piston of forcing press clutch |
| CN107053750A (en) * | 2016-12-11 | 2017-08-18 | 安徽海拓志永智能装备股份有限公司 | The piston of forcing press novel clutch |
| CN110107494A (en) * | 2019-06-02 | 2019-08-09 | 河南志林矿山设备科技有限公司 | A kind of plunger pump promotes chamber and its method for improving |
-
2015
- 2015-05-25 CN CN201520340530.0U patent/CN204784290U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104948606A (en) * | 2015-05-25 | 2015-09-30 | 浙江诸暨万宝机械有限公司 | Piston device |
| CN107031111A (en) * | 2016-12-11 | 2017-08-11 | 安徽海拓志永智能装备股份有限公司 | A kind of piston of forcing press clutch |
| CN107053750A (en) * | 2016-12-11 | 2017-08-18 | 安徽海拓志永智能装备股份有限公司 | The piston of forcing press novel clutch |
| CN110107494A (en) * | 2019-06-02 | 2019-08-09 | 河南志林矿山设备科技有限公司 | A kind of plunger pump promotes chamber and its method for improving |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 311835 Industrial Zone of Diankou Town, Zhuji City, Shaoxing City, Zhejiang Province Patentee after: Zhejiang Wanan Zhiyu Automobile Control System Co.,Ltd. Address before: 311835 Industrial Zone of Diankou Town, Zhuji City, Shaoxing City, Zhejiang Province Patentee before: ZHEJIANG ZHUJI MANPOWER MACHINERY CO.,LTD. |