CN104948606B - A kind of piston apparatus - Google Patents
A kind of piston apparatus Download PDFInfo
- Publication number
- CN104948606B CN104948606B CN201510269321.6A CN201510269321A CN104948606B CN 104948606 B CN104948606 B CN 104948606B CN 201510269321 A CN201510269321 A CN 201510269321A CN 104948606 B CN104948606 B CN 104948606B
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- Prior art keywords
- piston
- ring
- groove
- plunger shaft
- interference fitted
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Abstract
The invention discloses a kind of piston apparatus, including the pump housing, piston, piston rod and leather cup, the pump body is equipped with plunger shaft, the piston rod is embedded in the groove on piston by spheric end, the periphery of piston connection piston rod one end is equipped with annular groove, is equipped with piston ring in the annular groove, the piston ring is fabricated from a flexible material, the inner ring and annular groove of the piston ring are interference fitted, and the outer ring of the piston ring and plunger shaft are interference fitted.Piston apparatus of the invention, due to being provided with the flexible plunger ring being interference fitted with plunger shaft in the periphery of piston connection piston rod one end, when piston rod generates inclination, piston ring is as flexible support, prevent piston from generating inclined trend, it so avoids generating rigid eccentric wear between piston and piston cavity wall, to improve the sealing effect and service life of piston apparatus.
Description
Technical field
The present invention relates to a kind of piston apparatus.
Background technique
A kind of common clutch slave cylinder piston structure is as shown in Figure 1, include the pump housing 1, piston 2 and piston currently on the market
Bar 3.Wherein one end of piston 2 is equipped with leather cup 6, is equipped with groove 4, piston rod 3 with the end face of 6 opposite side of leather cup on piston 2
Connecting pin with piston 2 is spheric end 5, and shape and the spheric end 5 of groove 4 match, and piston rod 3 is embedded at by spheric end 5
In groove 4 on piston 2.In addition, as shown in Fig. 2, one end periphery that existing piston 2 connects piston rod 3 has no with plunger shaft 8 and connects
Touching, and gap is larger.During the work time, installation center and disengaging yoke center are bigger than normal for the piston, and the axis of piston rod 3 can be inclined
Axis from plunger shaft, at this point, piston 2 has inclined trend under the reaction of piston rod 3, between piston 2 and plunger shaft
Lateral force can significantly increase.It is long-term past in excessive unidirectional lateral force due to being rigid friction between piston and the pump housing
Multiple movement, will necessarily cause to wear, and pit occur to pump housing inner surface, cause the seal failure of the piston apparatus, generate leakage
The failure of oil, permeability.
Summary of the invention
It is easy to seal and fail the technical problem to be solved by the present invention is to solve prior art piston device, it generates oil leak, seep
The defect of oily failure.
In order to solve the above technical problem, the present invention provides technical solution it is as follows: a kind of piston apparatus, including the pump housing,
Piston, piston rod and leather cup, the pump body are equipped with plunger shaft, and the periphery of piston connection piston rod one end is equipped with ring
Slot is equipped with piston ring in the annular groove, and the piston ring is fabricated from a flexible material, the inner ring of the piston ring and annular groove interference
Cooperation, the outer ring of the piston ring and plunger shaft are interference fitted.
Further, the periphery of the piston ring is equipped at least two annular projections, the cricoid protrusion and plunger shaft
It is interference fitted, forms grease groove, the grease groove and plunger shaft clearance fit between two neighboring annular projection.
Further, lubricating oil or lubricating grease are equipped in the grease groove.
Further, it is open form, any shaft section in port that the port that spheric end enters is accommodated on the groove
On diameter be greater than or equal to spheric end maximum gauge.
Further, the material of the piston ring is in rubber, plastics, polytetrafluoroethylene (PTFE) or PA66 nylon+16%MoS2
At least one.
Piston apparatus of the invention is interference fitted due to being provided in the periphery of piston connection piston rod one end with plunger shaft
Flexible plunger ring, when piston rod generates inclination, piston ring is used as flexible support, prevents the inclined trend of piston generation, such as
This is avoided generating rigid eccentric wear between piston and piston cavity wall, to improve the sealing effect and service life of piston apparatus.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of prior art piston device；
Fig. 2 is the structural schematic diagram of prior art piston；
Fig. 3 is the structural schematic diagram of the present embodiment piston apparatus；
Fig. 4 is the structural schematic diagram of the present embodiment piston；
Fig. 5 is the structural schematic diagram of piston ring in the present embodiment.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, is integrally connected, may be a detachable connection；It can be with
It is the connection inside two elements；It can be directly connected, it can also indirectly connected through an intermediary, for the general of this field
For logical technical staff, the concrete meaning of above-mentioned term in the present invention can be understood with concrete condition.
As shown in figure 3, a kind of piston apparatus of the present embodiment is made that improvement on the basis of existing technology.Illustrated piston
Device includes the pump housing 1, piston 2, piston rod 3 and leather cup 6, plunger shaft 8 is equipped with inside the pump housing 1, wherein piston rod 3 passes through spherical shape
End 5 is embedded in the groove 4 on piston 2, the piston apparatus and indifference of above structure and the prior art.The improvement of the present embodiment
Place is, as shown in figure 4, being provided with annular groove 22 on the periphery that piston 2 connects 3 one end of piston rod, and in the annular groove 22
It is mounted with piston ring 7, the piston ring 7 is by wear-resisting, anti-corrosion, and the material with certain flexibility is made.The material of the piston ring 7 is excellent
It is selected as at least one of rubber, plastics, polytetrafluoroethylene (PTFE) or PA66 nylon+16%MoS2.Wherein PA66 nylon+16%MoS2
It is a kind of existing composite material with self-lubricating function, wherein the accounting of MoS2 is about 16%.
The inner ring and annular groove 22 of above-mentioned piston ring 7 are interference fitted, and outer ring and plunger shaft 8 are interference fitted, the benefit of the structure
It is, when piston rod generates inclination, piston ring prevents piston from generating inclined trend, so avoid living as flexible support
Rigid eccentric wear is generated between plug and piston cavity wall, to improve the sealing effect and service life of piston apparatus.
Further, as shown in figure 5, the periphery of the piston ring 7 of the present embodiment is equipped at least two annular projections 71, the ring
Shape protrusion 71 with plunger shaft 8 be interference fitted, and between two neighboring annular projection 71 formed grease groove 72, the grease groove 72 with
8 clearance fit of plunger shaft, under assembled state, injection has lubricating oil or lubricating grease in grease groove 72.The structure is advantageous in that,
Lubricating oil or lubricating grease are lubricated the rubbing surface between piston ring and plunger shaft always, although piston ring and plunger shaft interference
Cooperation, but due to lubricating oil or the lubricating action of lubricating grease, the frictional resistance between piston ring and plunger shaft is significantly reduced, together
When avoid the abrasion of piston ring, increase the sealing life of piston apparatus.
Meanwhile in piston rod inclination, multiple annular projections constitute multiple flexible supports, the tilting force that piston rod is generated
Dispersed, further strengthen the effect of flexible support, piston is avoided to generate inclined trend.Preferably, this reality
It applies and is provided with two annular projections on the piston ring of example, and be set to the both ends of piston ring.
Further, as shown in figure 4, accommodating the port 41 that spheric end 5 enters on the groove 4 of the present embodiment is open shape
Formula, and the diameter on any shaft section in port 41 is greater than or equal to the maximum gauge of spheric end 5.The improvement is for opposite
The improvement that prior art piston upper groove is made shown in Fig. 2, as shown in Fig. 2, the port 41 of its groove is necking form, axis
Diameter of section is less than the maximum gauge of spheric end.During the installation process, biggish external force need to be applied, produce the port 41 of groove 4
Spheric end 5 could be installed by raw biggish deformation.The structure causes great inconvenience, and biggish deformation meeting to installation
Have an adverse effect to the structural strength of piston.And the port 41 of the present embodiment opening form, then the prior art is overcome completely
Defect, it is easy for installation, the structure of piston will not be had an impact, and will not to the service performance of piston apparatus generate it is any
Detrimental effect.
In short, the foregoing is merely illustrative of the preferred embodiments of the present invention, it is not intended to limit the invention, it is all in the present invention
Spirit and principle within made any modifications, equivalent replacements, and improvements etc., should be included in protection scope of the present invention it
It is interior.
Claims (4)
1. a kind of piston apparatus, including the pump housing (1), piston (2), piston rod (3) and leather cup (6), the pump housing (1) is internal to be equipped with
Plunger shaft (8), which is characterized in that the periphery of piston (2) connection piston rod (3) one end is equipped with annular groove (22), the ring
Piston ring (7) are installed in slot (22), the piston ring is fabricated from a flexible material, the inner ring and annular groove of the piston ring (7)
(22) it is interference fitted, the outer ring and plunger shaft (8) of the piston ring (7) are interference fitted；The periphery of the piston ring (7) is equipped with extremely
Few two annular projections (71), the annular projection (71) and plunger shaft (8) are interference fitted, and multiple annular projections constitute multiple soft
Property support, form grease groove (72) between two neighboring annular projection (71), the grease groove (72) is matched with plunger shaft (8) gap
It closes.
2. piston apparatus described in accordance with the claim 1, which is characterized in that be equipped with lubricating oil or lubrication in the grease groove (72)
Rouge.
3. piston apparatus according to claim 1 or 2, which is characterized in that with leather cup (6) with respect to one on the piston (2)
The end face at end is equipped with groove (4), and it is open form, the end that the port (41) that spheric end (5) enter is accommodated on the groove (4)
Diameter on mouth (41) any shaft section is greater than or equal to the maximum gauge of spheric end (5).
4. piston apparatus described in accordance with the claim 3, which is characterized in that the material of the piston ring (7) be rubber, plastics,
At least one of polytetrafluoroethylene (PTFE) or PA66 nylon+16%MoS2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510269321.6A CN104948606B (en) | 2015-05-25 | 2015-05-25 | A kind of piston apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510269321.6A CN104948606B (en) | 2015-05-25 | 2015-05-25 | A kind of piston apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104948606A CN104948606A (en) | 2015-09-30 |
| CN104948606B true CN104948606B (en) | 2019-02-19 |
Family
ID=54163540
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510269321.6A Active CN104948606B (en) | 2015-05-25 | 2015-05-25 | A kind of piston apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104948606B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201944145U (en) * | 2010-10-05 | 2011-08-24 | 李中立 | Novel automobile clutch sub pump |
| CN202955159U (en) * | 2012-12-11 | 2013-05-29 | 四川制动科技股份有限公司 | Seal ring with oil storage function |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10327437A1 (en) * | 2002-06-24 | 2004-01-22 | Luk Lamellen Und Kupplungsbau Beteiligungs Kg | Hydraulic system e.g. for operating a motor vehicle clutch has emitter cylinder with piston made from thermosetting material |
| CN102606653B (en) * | 2011-12-22 | 2013-11-20 | 南车二七车辆有限公司 | Railway vehicle braking cylinder piston assembly |
| CN203604189U (en) * | 2013-12-06 | 2014-05-21 | 德州润东石油机械有限公司 | Piston for slurry pump |
| CN204061401U (en) * | 2014-07-10 | 2014-12-31 | 绍兴县精致机械制造有限公司 | For the hydraulic jack of air assistor |
| CN204784290U (en) * | 2015-05-25 | 2015-11-18 | 浙江诸暨万宝机械有限公司 | Piston structure |
-
2015
- 2015-05-25 CN CN201510269321.6A patent/CN104948606B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201944145U (en) * | 2010-10-05 | 2011-08-24 | 李中立 | Novel automobile clutch sub pump |
| CN202955159U (en) * | 2012-12-11 | 2013-05-29 | 四川制动科技股份有限公司 | Seal ring with oil storage function |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104948606A (en) | 2015-09-30 |
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| 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. |