CN114220685A - High-low gear switch of air pressure resistant structure for gearbox - Google Patents
High-low gear switch of air pressure resistant structure for gearbox Download PDFInfo
- Publication number
- CN114220685A CN114220685A CN202111424462.2A CN202111424462A CN114220685A CN 114220685 A CN114220685 A CN 114220685A CN 202111424462 A CN202111424462 A CN 202111424462A CN 114220685 A CN114220685 A CN 114220685A
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- plug
- base
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- subassembly
- cavity
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- 238000007789 sealing Methods 0.000 claims abstract description 41
- 238000009434 installation Methods 0.000 claims description 22
- 230000003068 static effect Effects 0.000 claims description 16
- 230000005540 biological transmission Effects 0.000 claims description 8
- 230000009471 action Effects 0.000 abstract description 6
- 239000012528 membrane Substances 0.000 abstract description 4
- 230000007257 malfunction Effects 0.000 abstract description 3
- 230000001960 triggered effect Effects 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
- H01H13/02—Details
- H01H13/04—Cases; Covers
- H01H13/06—Dustproof, splashproof, drip-proof, waterproof or flameproof casings
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
- H01H13/02—Details
- H01H13/12—Movable parts; Contacts mounted thereon
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- Gasket Seals (AREA)
Abstract
The invention provides a high-low gear switch with an air pressure resistant structure for a gearbox, which comprises a shell, a button assembly, a rectangular pad and a plug assembly, wherein the button assembly is arranged on the shell; the plug assembly consists of a base subassembly, a mandril, a movable plate return spring and a plug subassembly. The plug assembly lower end outer side is sealed through the rectangular sealing gasket between the inside of the shell and the plug assembly, gas and moisture are prevented from entering the inner cavity of the plug assembly from the outer side of the plug assembly, the O-shaped sealing ring and the ejector rod form dynamic sealing in the middle of the base subassembly, moisture and gas are prevented from entering the inner cavity in the middle of the plug assembly, the inner cavity of the plug assembly is enabled to be well sealed, a sealing membrane is not arranged any more, the air pressure action is only borne on the ejector rod, the pressed area is greatly reduced, the air pressure cannot cause the ejector rod to push the movable piece to malfunction, meanwhile, the rubber membrane is cancelled, the button assembly is in rigid contact with the ejector rod, external force is triggered and is not directly applied to the sealing element, the sealing element cannot be stressed and damaged, the service life is longer, and the work is more reliable.
Description
Technical Field
The invention relates to a switch, in particular to a high-low gear switch used in an air pressure environment on a gearbox.
Background
The existing mechanical gearbox high-low gear switch is arranged on a gear shifting cylinder of an auxiliary box, the switch is pressed to be switched on or switched off by means of reciprocating motion of a cylinder shifting fork shaft or a piston and the like, and the air pressure of the switch mounting position is generally 0.4-1 MPa. The existing high-low gear switch of the gearbox is mostly of a rubber diaphragm sealing structure, the rubber diaphragm is locally torn to cause the loss of sealing effect after being repeatedly worked for a long time, moist air and moisture can enter the interior of the switch, components such as a moving plate, a contact and a spring inside the switch are rusted or corroded, the rubber diaphragm can stretch out and draw back to mistakenly push an ejector rod to switch on or off an internal contact under the action of air pressure in the switch, a gear shifting mechanism is not triggered to cause misoperation, and the service life and the service reliability of the switch are seriously affected.
Aiming at the problems that the high-low gear switch of the gearbox sealed by the rubber diaphragm causes misoperation, the sealing diaphragm is torn and the like under the action of air pressure, the prior art mainly solves the problems in the direction of increasing the elasticity of an internal spring or enhancing the strength and toughness of the sealing diaphragm, but cannot fundamentally solve the problems.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a high-low gear switch with a novel air pressure resistant structure, so as to effectively solve the problems of low strength, poor fatigue resistance, mistaken on-off under the action of air pressure and the like of a sealing diaphragm in the prior art.
The technical scheme of the invention is as follows:
a high-low gear switch with an air pressure resistant structure for a gearbox comprises a shell, a button assembly, a rectangular pad and a plug assembly; the plug subassembly consists of a base subassembly, a mandril, a movable plate return spring and a plug subassembly;
the shell is provided with a hollow inner cavity, the hollow inner cavity is of a variable diameter structure and is provided with a plurality of step surfaces, the hollow variable diameter structure sequentially comprises a button rod extending hole, a button assembly mounting cavity, a base subassembly mounting cavity and a plug subassembly mounting cavity from small to large, and the opening part of the large end of the variable diameter structure is tightly matched with the plug subassembly;
the base sub assembly is mounted in a base sub assembly mounting cavity, wherein a rectangular pad is arranged on a step surface of the base sub assembly mounting cavity; the base subassembly component consists of a pressing sheet, a first O-shaped ring and a base; one surface of the pressing sheet is provided with an annular boss, the other surface of the pressing sheet is provided with a circular spigot, and the center of the pressing sheet is provided with a through hole for the ejector rod to pass through; one end of the base and the end face of the circular spigot of the pressing sheet form a dynamic sealing groove, and the first O-shaped ring 6 is arranged in the dynamic sealing groove; the base main body is of a cavity structure and is used for being matched with the plug subassembly to form a cavity for arranging the moving plate, the static plate and the moving plate return spring; the end face of the base matched with the pressing sheet is also provided with a central hole for the ejector rod to pass through;
when the base subassembly is installed in the base subassembly installation cavity, the annular boss of the pressing sheet is tightly pressed and hermetically matched with the rectangular pad on the step surface of the base subassembly installation cavity, and the outer wall surface of the base is tightly matched with the inner wall surface of the base subassembly installation cavity;
the plug subassembly consists of a plug part and a stator, and the stator is fixed on the outer wall surface of the inner end of the central column of the plug part; the outer side wall of the end face of the shell of the plug component is provided with an annular gap, when the plug component is installed in the plug subassembly installation cavity, the annular gap, the step surface of the plug subassembly installation cavity and the side wall surface of the plug subassembly installation cavity form a sealing ring installation groove, and a second O-shaped ring is arranged, so that the plug subassembly is in sealing connection, and the joint of the shell and the plug component is sealed;
the ejector rod penetrates through the pressing sheet and the central through hole of the base and is in dynamic sealing fit with the first O-shaped ring; the outer end of the ejector rod is contacted with the button assembly, the inner end of the ejector rod is sleeved with a movable plate, and the movable plate abuts against a radial bulge of the ejector rod; one end of the moving plate reset spring is arranged on the ejector rod and abuts against the moving plate, the other end of the moving plate reset spring is arranged on the annular spring seat at the inner end of the central column body of the plug part, and the moving plate reset spring is in a compressed state to realize axial limiting of the moving plate.
Furthermore, the opening part of the large end of the reducing structure is inwards contracted and is clamped and tightly matched with the plug subassembly.
Furthermore, the outer surface of the shell is provided with a thread section and a sealing groove which are connected with the external auxiliary box gear shifting cylinder.
Further, the button assembly comprises a button rod, a pressing spring and a button seat; the button rod is provided with a radial boss, the radial boss is positioned in the hollow cavity of the button seat, the back surface of the radial boss is matched with a necking at the opening part of the hollow cavity of the button seat, and the radial boss can be integrally abutted against the step surface of the button assembly mounting cavity of the shell after being matched, so that axial limiting is realized; the rod body part of the button rod extends out of the button rod extending hole of the shell; a compression-state pressing spring is installed in a hollow cavity of the button seat, the pretightening force of the pressing spring is internal force for the button rod and the button seat as a whole, and when the button rod is pressed, the pressing force for the button rod is transmitted to the button seat through the pressing spring.
Furthermore, one end of the base and the end face of the circular spigot of the pressing sheet are riveted or welded into a whole to form a dynamic sealing groove.
Furthermore, a rectangular guide groove is formed in the inner wall surface of the cavity structure of the base and used for being matched with the moving plate and the static plate, and the axial positions of the moving plate and the static plate correspond to each other.
Further, under the promotion of ejector pin, overcome moving plate reset spring's pressure, the contact of moving plate can contact with the contact of still, and under the restriction of the rectangle guide way of base, the contact of moving plate and the contact position of still correspond strictly.
Advantageous effects
The high-low gear switch with the air pressure resistant structure prevents air and moisture from entering the inner cavity of the plug assembly from the outer side of the lower end of the plug assembly through the rectangular sealing gasket between the inner part of the shell and the plug assembly, and prevents the moisture and the air from entering the inner cavity from the middle of the plug assembly through the movable seal formed by the O-shaped sealing ring in the middle of the base subassembly and the ejector rod, so that the inner cavity of the plug assembly is well sealed, a sealing membrane is not arranged, the air pressure is only borne on the ejector rod, the pressure bearing area is greatly reduced, the air pressure cannot cause the ejector rod to push the movable piece to malfunction, meanwhile, the rubber membrane is cancelled, the button assembly is in rigid contact with the ejector rod, the triggering external force cannot be directly applied to the sealing element, the sealing element cannot be damaged by stress, the service life is longer, and the work is more reliable.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic diagram of a high-low shift switch of an air pressure resistant structure for a transmission according to the present invention;
FIG. 2 is a schematic view of a plug assembly;
FIG. 3 is a schematic view of a base sub-assembly;
FIG. 4 is a schematic view of a plug sub-assembly;
the labels in the figure are: 1. a housing; 2. a button assembly; 3. a rectangular pad; 4. a plug assembly; 5. tabletting; 6. a first O-ring; 7. a top rod; 8. a base; 9. a moving plate; 10. a moving plate return spring; 11. a still sheet; 12. a second O-ring; 13. and a plug member.
Detailed Description
The technical solutions in the embodiments of the present invention will be described in detail below with reference to the drawings in the embodiments of the present invention, which are intended to further illustrate the present invention and should not be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.
Referring to fig. 1, 2, 3 and 4, the high-low gear switch of the pneumatic pressure resistant structure for the transmission in the present embodiment is composed of a housing 1, a button assembly 2, a rectangular pad 3 and a plug assembly 4; the button assembly 2 and the plug assembly 4 are both installed in the shell 1, and the rectangular pad 3 is arranged between the connection position of the plug assembly 4 and the shell 1. The plug assembly 4 consists of a base subassembly, a mandril 7, a movable plate 9, a movable plate return spring 10 and a plug subassembly.
The hollow inner cavity of the shell 1 is of a reducing structure and is provided with a plurality of step surfaces, the hollow reducing structure sequentially comprises a button rod extending hole, a button assembly mounting cavity, a base subassembly mounting cavity and a plug subassembly mounting cavity from small to large, and finally, the large end is provided with an inward-shrinking opening and is clamped and tightly matched with the plug subassembly. And the outer surface of the shell 1 is provided with a threaded section and a sealing groove which are connected with the external auxiliary box gear shifting cylinder.
The button assembly 2 comprises a button rod, a pressing spring and a button seat; the button rod is provided with a radial boss, the radial boss is positioned in the hollow cavity of the button seat, the back surface of the radial boss is matched with a necking at the opening part of the hollow cavity of the button seat, and the radial boss can be integrally abutted against the step surface of the button assembly mounting cavity of the shell 1 after being matched, so that axial limiting is realized; the lever body portion of the button lever extends out of the button lever extension hole of the casing 1. A compression-state pressing spring is installed in a hollow cavity of the button seat, the pretightening force of the pressing spring is internal force for the button rod and the button seat as a whole, and when the button rod is pressed, the pressing force for the button rod is transmitted to the button seat through the pressing spring.
The plug assembly 4 consists of a base subassembly, a mandril 7, a movable plate 9, a movable plate return spring 10 and a plug subassembly.
The base sub assembly is mounted in a base sub assembly mounting cavity, wherein a rectangular pad 3 is arranged on a stepped surface of the base sub assembly mounting cavity. The base subassembly is comprised of a wafer 5, a first O-ring 6, and a base 8. One surface of the pressing sheet 5 is provided with an annular boss, the other surface is provided with a circular spigot, and the center of the pressing sheet is provided with a through hole for the ejector rod 7 to pass through; one end of the base 8 and the end face of the circular spigot of the pressing sheet 5 are riveted or welded into a whole to form a dynamic sealing groove, and the first O-shaped ring 6 is arranged in the dynamic sealing groove; the main body of the base 8 is a cavity structure and is used for being matched with the plug subassembly to form a cavity for arranging the movable plate 9, the static plate 11 and the movable plate return spring 10. The end face of the base 8 matched with the pressing sheet 5 is also provided with a central hole for the ejector rod 7 to pass through, and the inner wall surface of the cavity structure of the base 8 is provided with a rectangular guide groove for matching with the moving sheet 10 and the static sheet 11, so that the axial positions of the moving sheet 10 and the static sheet 11 correspond.
When the base subassembly is installed in the base subassembly installation cavity, the annular boss of the pressing sheet 5 is in press sealing fit with the rectangular pad 3 on the step surface of the base subassembly installation cavity, and the outer wall surface of the base 8 is in tight fit with the inner wall surface of the base subassembly installation cavity.
The plug subassembly consists of a plug part 13 and a static sheet 11, and the static sheet 11 is riveted on the outer wall surface of the inner end of the central column of the plug part 13. And the outer side wall of the end face of the shell of the plug component 13 is provided with an annular gap, when the plug component 13 is installed in the plug subassembly installation cavity, the annular gap, the step surface of the plug subassembly installation cavity and the side wall surface of the plug subassembly installation cavity form a sealing ring installation groove, and a second O-shaped ring 12 is arranged to realize the sealing connection of the plug subassembly and seal the joint of the shell 1 and the plug component 4.
When the base subassembly and the plug subassembly are installed, a sealed cavity is formed between the base subassembly and the plug subassembly.
The ejector rod 7 penetrates through the pressing sheet 5 and a central through hole of the base 8 and is in dynamic sealing fit with the first O-shaped ring 6; the outer end of the ejector rod 7 is contacted with the front end of the button seat, the inner end of the ejector rod 7 is sleeved with a movable plate 9, and the movable plate 9 abuts against a radial bulge of the ejector rod 7; one end of a moving plate return spring 10 is arranged on the ejector rod 8 and is abutted against the moving plate 9, the other end of the moving plate return spring is arranged on an annular spring seat at the inner end of a central column body of the plug part 13, and the moving plate return spring 10 is in a compressed state to realize axial limiting of the moving plate 9. Under the push of the push rod 7, the contact of the moving plate 9 can contact with the contact of the static plate 11 by overcoming the pressure of the moving plate return spring 10, and under the limitation of the rectangular guide groove of the base 8, the contact of the moving plate 9 strictly corresponds to the contact of the static plate 11.
When the invention is used, the push rod is pushed by the button assembly, and the push rod pushes the moving plate to move towards the plug assembly, so that the moving plate contact is communicated with the static plate contact, and the gearbox switch is communicated; when the external force disappears, the movable plate is far away from the static plate under the action of the reset spring, so that the movable plate is disconnected with the static plate, and the switch of the gearbox is disconnected; the rubber diaphragm used for sealing at the end of the button assembly is cancelled, the rectangular ring and the O-shaped ring are used for replacing sealing, the air pressure action at the switch installation position is only borne on the ejector rod, the pressed area of the ejector rod is greatly reduced, the air pressure cannot cause the ejector rod to push the movable piece to malfunction, and meanwhile, because the rubber diaphragm is cancelled, the button assembly is in rigid contact with the ejector rod, the triggering external force is not directly acted on the sealing piece, so that the sealing piece cannot be stressed and damaged, the service life is longer, and the work is more reliable.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made in the above embodiments by those of ordinary skill in the art without departing from the principle and spirit of the present invention.
Claims (7)
1. The utility model provides a high low gear switch of resistant atmospheric pressure structure for gearbox which characterized in that: the button assembly comprises a shell, a button assembly, a rectangular pad and a plug assembly; the plug subassembly consists of a base subassembly, a mandril, a movable plate return spring and a plug subassembly;
the shell is provided with a hollow inner cavity, the hollow inner cavity is of a variable diameter structure and is provided with a plurality of step surfaces, the hollow variable diameter structure sequentially comprises a button rod extending hole, a button assembly mounting cavity, a base subassembly mounting cavity and a plug subassembly mounting cavity from small to large, and the opening part of the large end of the variable diameter structure is tightly matched with the plug subassembly;
the base sub assembly is mounted in a base sub assembly mounting cavity, wherein a rectangular pad is arranged on a step surface of the base sub assembly mounting cavity; the base subassembly component consists of a pressing sheet, a first O-shaped ring and a base; one surface of the pressing sheet is provided with an annular boss, the other surface of the pressing sheet is provided with a circular spigot, and the center of the pressing sheet is provided with a through hole for the ejector rod to pass through; one end of the base and the end face of the circular spigot of the pressing sheet form a dynamic sealing groove, and the first O-shaped ring 6 is arranged in the dynamic sealing groove; the base main body is of a cavity structure and is used for being matched with the plug subassembly to form a cavity for arranging the moving plate, the static plate and the moving plate return spring; the end face of the base matched with the pressing sheet is also provided with a central hole for the ejector rod to pass through;
when the base subassembly is installed in the base subassembly installation cavity, the annular boss of the pressing sheet is tightly pressed and hermetically matched with the rectangular pad on the step surface of the base subassembly installation cavity, and the outer wall surface of the base is tightly matched with the inner wall surface of the base subassembly installation cavity;
the plug subassembly consists of a plug part and a stator, and the stator is fixed on the outer wall surface of the inner end of the central column of the plug part; the outer side wall of the end face of the shell of the plug component is provided with an annular gap, when the plug component is installed in the plug subassembly installation cavity, the annular gap, the step surface of the plug subassembly installation cavity and the side wall surface of the plug subassembly installation cavity form a sealing ring installation groove, and a second O-shaped ring is arranged, so that the plug subassembly is in sealing connection, and the joint of the shell and the plug component is sealed;
the ejector rod penetrates through the pressing sheet and the central through hole of the base and is in dynamic sealing fit with the first O-shaped ring; the outer end of the ejector rod is contacted with the button assembly, the inner end of the ejector rod is sleeved with a movable plate, and the movable plate abuts against a radial bulge of the ejector rod; one end of the moving plate reset spring is arranged on the ejector rod and abuts against the moving plate, the other end of the moving plate reset spring is arranged on the annular spring seat at the inner end of the central column body of the plug part, and the moving plate reset spring is in a compressed state to realize axial limiting of the moving plate.
2. The barometric-pressure-resistant high-low gear switch for a transmission according to claim 1, wherein: the opening part of the large end of the reducing structure is inwards contracted and is clamped and tightly matched with the plug subassembly.
3. The barometric-pressure-resistant high-low gear switch for a transmission according to claim 1, wherein: the outer surface of the shell is provided with a thread section and a sealing groove which are connected with the external auxiliary box gear shifting cylinder.
4. The barometric-pressure-resistant high-low gear switch for a transmission according to claim 1, wherein: the button assembly comprises a button rod, a pressing spring and a button seat; the button rod is provided with a radial boss, the radial boss is positioned in the hollow cavity of the button seat, the back surface of the radial boss is matched with a necking at the opening part of the hollow cavity of the button seat, and the radial boss can be integrally abutted against the step surface of the button assembly mounting cavity of the shell after being matched, so that axial limiting is realized; the rod body part of the button rod extends out of the button rod extending hole of the shell; a compression-state pressing spring is installed in a hollow cavity of the button seat, the pretightening force of the pressing spring is internal force for the button rod and the button seat as a whole, and when the button rod is pressed, the pressing force for the button rod is transmitted to the button seat through the pressing spring.
5. The barometric-pressure-resistant high-low gear switch for a transmission according to claim 1, wherein: one end of the base is riveted or welded with the end face of the circular spigot of the pressing sheet into a whole to form a dynamic sealing groove.
6. The barometric-pressure-resistant high-low gear switch for a transmission according to claim 1, wherein: the inner wall surface of the cavity structure of the base is provided with a rectangular guide groove which is used for being matched with the moving plate and the static plate so that the axial positions of the moving plate and the static plate correspond.
7. The barometric-pressure-resistant high-low gear switch for a transmission according to claim 6, wherein: under the promotion of ejector pin, overcome moving plate reset spring's pressure, the contact of moving plate can contact with the contact of still, and under the restriction of the rectangle guide way of base, the contact of moving plate and the contact position of still correspond strictly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111424462.2A CN114220685A (en) | 2021-11-26 | 2021-11-26 | High-low gear switch of air pressure resistant structure for gearbox |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111424462.2A CN114220685A (en) | 2021-11-26 | 2021-11-26 | High-low gear switch of air pressure resistant structure for gearbox |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114220685A true CN114220685A (en) | 2022-03-22 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111424462.2A Pending CN114220685A (en) | 2021-11-26 | 2021-11-26 | High-low gear switch of air pressure resistant structure for gearbox |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114220685A (en) |
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|---|---|---|---|---|
| DE3713662A1 (en) * | 1987-04-24 | 1988-11-17 | Teves Gmbh Alfred | Electro-hydraulic device for continuous monitoring of the pressure in a motor vehicle hydraulic brake system |
| CN201975335U (en) * | 2011-04-22 | 2011-09-14 | 辽宁光大机械制造有限公司 | Fall-preventing pressure switch |
| CN203839232U (en) * | 2014-04-14 | 2014-09-17 | 陕西法士特齿轮有限责任公司 | Pressure switch |
| CN105336530A (en) * | 2015-10-28 | 2016-02-17 | 武汉天运汽车电器有限公司 | Novel normally open and normally closed general structure of transmission switch |
| CN205984739U (en) * | 2016-08-26 | 2017-02-22 | 湖北天运汽车电器系统有限公司 | Gearbox switch |
| CN107146725A (en) * | 2017-05-27 | 2017-09-08 | 东风商用车有限公司 | A kind of sky in gearbox reverses gear construction of switch |
| CN209266254U (en) * | 2018-09-29 | 2019-08-16 | 西安法士特汽车传动有限公司 | A kind of air pressure resistance driving switch, gearbox and automobile |
| WO2020200713A1 (en) * | 2019-03-29 | 2020-10-08 | Condor-Werke Gebr. Frede GmbH | Pressure switch device |
| CN212587407U (en) * | 2020-08-18 | 2021-02-23 | 浙江创拓汽车部件有限公司 | Normally closed neutral gear pressure switch |
| CN112735886A (en) * | 2020-12-30 | 2021-04-30 | 温州市三峻轿车配件有限公司 | Single-contact signal switch |
-
2021
- 2021-11-26 CN CN202111424462.2A patent/CN114220685A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3713662A1 (en) * | 1987-04-24 | 1988-11-17 | Teves Gmbh Alfred | Electro-hydraulic device for continuous monitoring of the pressure in a motor vehicle hydraulic brake system |
| CN201975335U (en) * | 2011-04-22 | 2011-09-14 | 辽宁光大机械制造有限公司 | Fall-preventing pressure switch |
| CN203839232U (en) * | 2014-04-14 | 2014-09-17 | 陕西法士特齿轮有限责任公司 | Pressure switch |
| CN105336530A (en) * | 2015-10-28 | 2016-02-17 | 武汉天运汽车电器有限公司 | Novel normally open and normally closed general structure of transmission switch |
| CN205984739U (en) * | 2016-08-26 | 2017-02-22 | 湖北天运汽车电器系统有限公司 | Gearbox switch |
| CN107146725A (en) * | 2017-05-27 | 2017-09-08 | 东风商用车有限公司 | A kind of sky in gearbox reverses gear construction of switch |
| CN209266254U (en) * | 2018-09-29 | 2019-08-16 | 西安法士特汽车传动有限公司 | A kind of air pressure resistance driving switch, gearbox and automobile |
| WO2020200713A1 (en) * | 2019-03-29 | 2020-10-08 | Condor-Werke Gebr. Frede GmbH | Pressure switch device |
| CN212587407U (en) * | 2020-08-18 | 2021-02-23 | 浙江创拓汽车部件有限公司 | Normally closed neutral gear pressure switch |
| CN112735886A (en) * | 2020-12-30 | 2021-04-30 | 温州市三峻轿车配件有限公司 | Single-contact signal switch |
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