CN216288177U - Air pressure alarm switch - Google Patents
Air pressure alarm switch Download PDFInfo
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- CN216288177U CN216288177U CN202122663367.XU CN202122663367U CN216288177U CN 216288177 U CN216288177 U CN 216288177U CN 202122663367 U CN202122663367 U CN 202122663367U CN 216288177 U CN216288177 U CN 216288177U
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- lower cover
- base
- seat
- alarm switch
- contact piece
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Abstract
The utility model relates to the technical field of switches, and particularly discloses a pneumatic alarm switch which comprises an upper cover, a lower cover and a base, wherein the lower cover is embedded on the base, a gas channel is arranged on the base, the upper cover and the lower cover are sealed through a first O-shaped ring, the first O-shaped ring is hermetically connected with the upper cover, the lower cover and the base, a polyester membrane is arranged between the lower cover and the base, and the polyester membrane is sealed with the base through a second O-shaped ring. Adopt above-mentioned structure, provide one kind and reduced the switch assembly process, improve the atmospheric pressure alarm switch of waterproof grade.
Description
Technical Field
The utility model relates to the technical field of switches, in particular to an air pressure alarm switch.
Background
The automobile air pressure alarm switch is an important part of a commercial vehicle, and the main function of the automobile air pressure alarm switch is to provide an alarm signal for a brake system of the whole vehicle. When the air source of the braking system is higher than the corresponding pressure value, the switch is switched off, and when the air source of the braking system is lower than the corresponding pressure value, the switch is switched on, and at the moment, the switch provides an alarm signal for the braking system.
The existing air pressure alarm switch and the production process are complicated, the quality is difficult to control, the reliability is poor, and the cost is high; the switch has lower protection grade and is generally difficult to meet the requirements of the whole automobile of automobile manufacturers.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects of the prior art, the utility model provides the air pressure alarm switch which reduces the switch assembly procedures and improves the waterproof grade.
In order to achieve the purpose, the utility model adopts the technical scheme that: the utility model provides a barometric alarm switch, includes upper cover, lower cover and base, the lower cover inlays and establishes on the base, be provided with gas passage on the base, it is sealed through first O type circle between upper cover and the lower cover, first O type circle and upper cover, lower cover and base three sealing connection, be provided with the polyester diaphragm between lower cover and the base, it is sealed through second O type circle between polyester diaphragm and the base.
As a further arrangement of the present invention, a driving seat is disposed between the lower cover and the polyester diaphragm, one end of the driving seat abuts against the polyester diaphragm, and the other end of the driving seat extends upward through the lower cover to abut against a movable contact assembly disposed above the lower cover.
The movable contact assembly comprises a contact seat arranged above a lower cover and a movable contact piece arranged on the contact seat, wherein a static contact piece corresponding to the movable contact piece is arranged on the lower cover, a silver contact is arranged on the static contact piece, a binding post is connected to the static contact piece, and the binding post penetrates through the contact seat to form guide fit.
As a further arrangement of the utility model, a compression spring is arranged above the contact seat, and a pressure adjusting mechanism is arranged on the compression spring.
As a further arrangement of the present invention, the pressure adjusting mechanism includes a spring seat against which the compression spring abuts and an adjusting screw that drives the spring seat to move up and down, and the adjusting screw is screwed to the upper cover.
By adopting the technical scheme, the gluing and sealing of the riveting position of the metal base are changed into a sealing mode of compressing the upper cover and the lower cover by using the first O-shaped ring, so that the switch assembling procedures are reduced; the polyester membrane is made of polyester materials, the second O-shaped ring is used for sealing below the polyester membrane, the compression amount of the second O-shaped ring is ensured through the size of the groove in the metal base, the switch is simpler to assemble, the waterproof grade of the switch is improved to a great extent, and the waterproof grade can reach IP6K 7; meanwhile, hydrogenated nitrile rubber is used as the material of the first O-shaped ring and the second O-shaped ring, so that the product can be used at the temperature of between 40 ℃ below zero and 140 ℃.
The utility model is further described below with reference to the accompanying drawings.
Drawings
FIG. 1 is a front elevation view of a structure embodying the present invention;
FIG. 2 is a cross-sectional view A-A of FIG. 1;
FIG. 3 is a side view of the structure of an embodiment of the present invention;
fig. 4 is a sectional view B-B of fig. 3.
Detailed Description
The specific embodiment of the utility model is shown in fig. 1-4, and the air pressure alarm switch comprises an upper cover 1, a lower cover 2 and a base 3, wherein the lower cover 2 is embedded on the base 3, an air channel 31 is arranged on the base 3, the upper cover 1 and the lower cover 2 are sealed by a first O-ring 32, the first O-ring 32 is hermetically connected with the upper cover 1, the lower cover 2 and the base 3, a polyester membrane 33 is arranged between the lower cover 2 and the base 3, and the polyester membrane 33 is sealed with the base 3 by a second O-ring 34.
A driving seat 4 is arranged between the lower cover 2 and the polyester diaphragm 33, one end of the driving seat 4 abuts against the polyester diaphragm 33, and the other end of the driving seat 4 extends upwards through the lower cover 2 to abut against a movable contact assembly 5 arranged above the lower cover 2.
The movable contact assembly 5 comprises a contact seat 51 arranged above the lower cover 2 and a movable contact piece 52 arranged on the contact seat 51, wherein a static contact piece 21 corresponding to the movable contact piece 52 is arranged on the lower cover 2, a static contact 22 is arranged on the static contact piece 21, a binding post 23 is connected to the static contact piece 21, and the binding post 23 is arranged on the contact seat 51 in a penetrating mode to form guiding matching.
A compression spring 53 is arranged above the contact seat 51, and a pressure adjusting mechanism is arranged on the compression spring 53.
The pressure adjustment mechanism includes a spring seat 531 against which the compression spring 53 abuts, and an adjustment screw 532 for driving the spring seat 531 to move up and down, and the adjustment screw 532 is screwed to the upper lid 1.
The gluing sealing of the riveting position of the metal base 3 is changed into a sealing mode of compressing the upper cover 1 and the lower cover 2 by using the first O-shaped ring 32, so that the switch assembly procedures are reduced, and the switch can reach the protection grade of the shell of IP6K7 or even higher requirements under the state of no gluing; the polyester membrane 33 is made of polyester materials, the second O-shaped ring 34 is used for sealing below the polyester membrane 33, the compression amount of the second O-shaped ring 34 is ensured through the size of a groove in the metal base 3, the switch is simpler to assemble, the waterproof grade of the switch is improved to a great extent, and the waterproof grade can reach IP6K 7; meanwhile, hydrogenated nitrile rubber is used as the material of the first O-shaped ring and the second O-shaped ring, so that the product can be used at the temperature of between 40 ℃ below zero and 140 ℃.
In the aspect of improving the product performance, after the movable contact piece 52 is assembled on the contact block 51, the contact block 51 moves under the guidance of the binding post 23, which is beneficial to improving the product performance.
After second O type circle 34 assembles the recess in the metal base 3, assembles polyester film piece 33 above it, then assembles 1 subassembly of upper cover, and it is sealed also to assemble first O type circle 32 between upper cover 1 of 1 subassembly of upper cover and the lower cover 2 simultaneously, then carries out the throat riveting with the switch, makes inside O type circle compression back, and the switch reaches sealed effect.
When the air pressure greater than the switch alarm value is introduced, the air pressure can push the polyester membrane 33 to drive the contact seat 51 to move towards the opposite direction of an air source, the movable contact piece 52 is pushed away from the silver contact on the static contact piece 21, and the switch is in a disconnected state.
The switch has simple structure design and convenient installation, and reduces the switch cost; the switch structure of prior art is complicated, and it is more to relate to part, process, and needs riveting, welding many times during the inside part assembly, and polyester film 33 needs hot briquetting, is unfavorable for the quality management and control of each part and subassembly. Unnecessary riveting process has been cancelled in this design, has cancelled the welding process, has also cancelled the hot briquetting process of polyester diaphragm 33, has greatly improved the assembly flow, has ensured the uniformity of part after the assembly.
The movable contact piece 52 is made of H62Y2 brass, the silver contact on the static contact piece 21 which is in contact with the movable contact piece is made of AgNi10 which has good electric conductivity and thermal conductivity, low and stable contact resistance and can greatly prolong the service life of the switch; the O-shaped ring is made of hydrogenated nitrile rubber, the material has good oil resistance, high and low temperature resistance and higher compression permanent deformation resistance, the sealing performance of the switch can be greatly improved, the polyester membrane 33 is made of PET, the material has good mechanical performance, the oil resistance and high and low temperature resistance are good, the gas and water vapor permeability is low, and the service life and the sealing performance of the switch can be greatly improved.
After the movable contact piece 52 is assembled on the contact seat 51, the contact seat 51 is sleeved on the binding post 23 of the upper cover 1, the binding post 23 is taken as a guide seat direction, and the movable contact piece 52 does not deviate or skew in vertical movement, so that the stability of the switch is effectively improved.
In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.
The present invention is not limited to the above embodiments, and those skilled in the art can implement the present invention in other embodiments according to the disclosure of the present invention, or make simple changes or modifications on the design structure and idea of the present invention, and fall into the protection scope of the present invention.
Claims (5)
1. The utility model provides a pneumatic alarm switch, includes upper cover, lower cover and base, the lower cover inlays and establishes on the base, be provided with gas passage, its characterized in that on the base: the upper cover and the lower cover are sealed through a first O-shaped ring, the first O-shaped ring is hermetically connected with the upper cover, the lower cover and the base, a polyester diaphragm is arranged between the lower cover and the base, and the polyester diaphragm and the base are sealed through a second O-shaped ring.
2. The pneumatic alarm switch of claim 1, wherein: and a driving seat is arranged between the lower cover and the polyester diaphragm, one end of the driving seat is abutted against the polyester diaphragm, and the other end of the driving seat extends upwards to penetrate through the lower cover to be abutted against a moving contact component arranged above the lower cover.
3. The pneumatic alarm switch of claim 2, wherein: the moving contact assembly comprises a contact seat arranged above the lower cover and a moving contact piece arranged on the contact seat, a static contact piece corresponding to the moving contact piece is arranged on the lower cover, a silver contact is arranged on the static contact piece, a binding post is connected to the static contact piece, and the binding post is arranged on the contact seat in a penetrating mode to form guide matching.
4. A pneumatic alarm switch according to claim 3, wherein: and a compression spring is arranged above the contact seat, and a pressure adjusting mechanism is arranged on the compression spring.
5. The pneumatic alarm switch of claim 4, wherein: the pressure adjusting mechanism comprises a spring seat for abutting the compression spring and an adjusting screw for driving the spring seat to move up and down, and the adjusting screw is in threaded connection with the upper cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122663367.XU CN216288177U (en) | 2021-11-02 | 2021-11-02 | Air pressure alarm switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122663367.XU CN216288177U (en) | 2021-11-02 | 2021-11-02 | Air pressure alarm switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216288177U true CN216288177U (en) | 2022-04-12 |
Family
ID=81004200
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122663367.XU Active CN216288177U (en) | 2021-11-02 | 2021-11-02 | Air pressure alarm switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216288177U (en) |
-
2021
- 2021-11-02 CN CN202122663367.XU patent/CN216288177U/en active Active
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