CN201449935U - Limit structure for piston switch - Google Patents
Limit structure for piston switch Download PDFInfo
- Publication number
- CN201449935U CN201449935U CN2009200455849U CN200920045584U CN201449935U CN 201449935 U CN201449935 U CN 201449935U CN 2009200455849 U CN2009200455849 U CN 2009200455849U CN 200920045584 U CN200920045584 U CN 200920045584U CN 201449935 U CN201449935 U CN 201449935U
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- Prior art keywords
- piston
- cavity
- switch
- push rod
- push
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Abstract
The utility model discloses a limit structure for a piston switch, wherein a partition board is arranged inside a cavity body of a case body, a part of the cavity body below the partition board is a hydraulic cavity, and a part of the cavity body above the partition board is an assembly cavity. The cavity wall of the hydraulic cavity is provided with a fluid inflow hole, and a piston is disposed inside the hydraulic cavity. A push-pull switch is arranged inside the assembly cavity, and a push rod of the piston penetrates through the assembly cavity to be fixedly connected to a wrench of the push-pull switch. The push rod of the piston is retractable, and a limit plate arranged above the piston is disposed on the inner wall of the case body. The limit structure for a piston switch has the advantages of being simple in structure and convenient in use.
Description
Technical field
The utility model relates to a kind of pressure type switch, particularly relates to a kind of position limiting structure of piston switch.
Background technology
Existing pressure switch, form by pressure-sensing device, adjusting device, moving contact, base and housing, be characterized in that pressure-sensing device adopts bellows or bellows, the moving contact of directly burn-oning above, be subjected to air pressure or hydraulic control, fixed contact be installed in the adjusting device with moving contact on same center line.The structure of this pressure switch is comparatively complicated, and operation also bothers.In addition, the existing plug-type switch of piston that adopts, the shortcoming of this switch is: the product of the liquid in entering cavity is pressed too big, makes piston produce instantaneous impact, makes switch be subjected to very big impulsive force, damages switch easily.
Summary of the invention
The purpose of this utility model provides the position limiting structure of the high piston switch of a kind of security performance, simultaneously, the utlity model has advantage easy to use.
The technical scheme that realizes the utility model purpose is as follows:
The position limiting structure of piston switch, be provided with dividing plate in the cavity of housing, the cavity of this dividing plate below is a hydraulic cavities, and the cavity of dividing plate top is an assembly cavity, and the chamber wall of described hydraulic cavities is provided with liquid inflow port, be provided with piston in the hydraulic cavities, be provided with push-and-pull switch in the assembly cavity, the push rod of piston penetrates in the assembly cavity fixedlys connected with the spanner of described push-and-pull switch, and the push rod of described piston is telescopic push rod, described inner walls is provided with limiting plate, and this limiting plate is positioned at the piston top.
Described piston upper surface is provided with spring, fixedlys connected with dividing plate in the upper end of this spring.
The push rod of described piston is provided with sealing gasket.
Adopted such scheme, the chamber wall of described hydraulic cavities is provided with liquid inflow port, is provided with piston in the hydraulic cavities, is provided with push-and-pull switch in the assembly cavity, the push rod of piston penetrates in the assembly cavity fixedlys connected with the spanner of described push-and-pull switch, and the push rod of described piston is telescopic push rod.After liquid enters hydraulic cavities, can produce pressure to piston, promote piston and move upward, after rising to set point, the push rod on the piston then can be opened by pull switch, continues to enter hydraulic cavities with controlling liquid, the automatic monitoring that the height of liquid level is obtained.Described inner walls is provided with limiting plate, and this limiting plate is positioned at the piston top.By limiting plate piston is limited, can prevent to make the piston fast rise cause push-and-pull switch to damage because of the excessive impulsive force of instantaneous generation.The utility model is made of several simple parts, and is not only simple in structure, and need not the people for monitoring when using, very easy to use.
The utility model is described in further detail below in conjunction with the drawings and specific embodiments.
Description of drawings
Fig. 1 is the structural representation of embodiment of the present utility model;
In the accompanying drawing, 1 is housing, and 2 is dividing plate, and 3 is hydraulic cavities, and 4 is assembly cavity, and 5 is liquid inflow port, and 6 is piston, and 7 is push-and-pull switch, and 8 is push rod, and 9 is spanner, and 10 is sealing gasket.11 is limiting plate, and 12 is spring.
Embodiment
With reference to Fig. 1, position limiting structure for piston switch of the present utility model, be provided with dividing plate 2 in the cavity of housing 1, the cavity of this dividing plate below is a hydraulic cavities 3, and the cavity of dividing plate 2 tops is an assembly cavity 4, the chamber wall of described hydraulic cavities is provided with liquid inflow port 5, be provided with piston 6 in the hydraulic cavities, be provided with push-and-pull switch 7 in the assembly cavity 4, the push rod of piston penetrates in the assembly cavity fixedlys connected with the spanner of described push-and-pull switch, the push rod 8 of piston 6 is telescopic push rod, and the push rod of piston is provided with sealing gasket 10.Housing 1 inwall is provided with limiting plate 11, and this limiting plate is positioned at piston 6 tops.Piston 6 upper surfaces are provided with spring 12, fixedly connected with dividing plate in the upper end of this spring.
Switch of the present utility model is assemblied in the tank that needs monitoring, sets the liquid level maximum in the tank.After liquid enters hydraulic cavities from liquid inflow port, piston is produced pressure, piston is moved up, piston promotes pushrod movement, after surpassing the setting fluid value, push rod promotes the spanner of push-and-pull switch, and push-and-pull switch is opened and continued to enter in the tank with controlling liquid.
Claims (3)
1. the position limiting structure of piston switch, be provided with dividing plate in the cavity of housing, the cavity of this dividing plate below is a hydraulic cavities, the cavity of dividing plate top is an assembly cavity, the chamber wall of described hydraulic cavities is provided with liquid inflow port, be provided with piston in the hydraulic cavities, be provided with push-and-pull switch in the assembly cavity, the push rod of piston penetrates in the assembly cavity fixedlys connected with the spanner of described push-and-pull switch, the push rod of described piston is telescopic push rod, it is characterized in that: described inner walls is provided with limiting plate, and this limiting plate is positioned at the piston top.
2. the position limiting structure of piston switch according to claim 1, it is characterized in that: described piston upper surface is provided with spring, fixedlys connected with dividing plate in the upper end of this spring.
3. the position limiting structure of piston switch according to claim 1, it is characterized in that: the push rod of described piston is provided with sealing gasket.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200455849U CN201449935U (en) | 2009-05-21 | 2009-05-21 | Limit structure for piston switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200455849U CN201449935U (en) | 2009-05-21 | 2009-05-21 | Limit structure for piston switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201449935U true CN201449935U (en) | 2010-05-05 |
Family
ID=42554658
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200455849U Expired - Fee Related CN201449935U (en) | 2009-05-21 | 2009-05-21 | Limit structure for piston switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201449935U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104701073A (en) * | 2015-02-21 | 2015-06-10 | 郑景文 | Brake switch of automobile |
| CN106710962A (en) * | 2017-01-17 | 2017-05-24 | 湖北三江航天红林探控有限公司 | Air pressure based power connection switch |
| CN108713975A (en) * | 2018-08-20 | 2018-10-30 | 马万连 | A kind of water dispenser of preventing dry combustion |
-
2009
- 2009-05-21 CN CN2009200455849U patent/CN201449935U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104701073A (en) * | 2015-02-21 | 2015-06-10 | 郑景文 | Brake switch of automobile |
| CN104701073B (en) * | 2015-02-21 | 2016-11-23 | 郑景文 | vehicle brake switch |
| CN106710962A (en) * | 2017-01-17 | 2017-05-24 | 湖北三江航天红林探控有限公司 | Air pressure based power connection switch |
| CN106710962B (en) * | 2017-01-17 | 2019-01-22 | 湖北三江航天红林探控有限公司 | A kind of air pressure connects electric switch |
| CN108713975A (en) * | 2018-08-20 | 2018-10-30 | 马万连 | A kind of water dispenser of preventing dry combustion |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100505 Termination date: 20100521 |