CN109606342B - Suspension type foot brake valve with three-gear Hall switch - Google Patents
Suspension type foot brake valve with three-gear Hall switch Download PDFInfo
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- CN109606342B CN109606342B CN201811633967.8A CN201811633967A CN109606342B CN 109606342 B CN109606342 B CN 109606342B CN 201811633967 A CN201811633967 A CN 201811633967A CN 109606342 B CN109606342 B CN 109606342B
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- 239000000725 suspension Substances 0.000 title claims abstract description 24
- 238000007789 sealing Methods 0.000 claims description 31
- 230000000712 assembly Effects 0.000 claims 1
- 238000000429 assembly Methods 0.000 claims 1
- 238000009434 installation Methods 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 230000009471 action Effects 0.000 description 5
- 230000007547 defect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T15/00—Construction arrangement, or operation of valves incorporated in power brake systems and not covered by groups B60T11/00 or B60T13/00
- B60T15/02—Application and release valves
- B60T15/04—Driver's valves
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L7/00—Electrodynamic brake systems for vehicles in general
- B60L7/28—Eddy-current braking
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- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Power Engineering (AREA)
- Push-Button Switches (AREA)
- Braking Systems And Boosters (AREA)
Abstract
The invention discloses a suspension foot brake valve with a three-gear Hall switch, which comprises an upper shell, a lower shell, an upper piston assembly, a lower piston assembly and a Hall switch assembly, wherein an upper end cover is arranged at the top of the upper shell, and a push rod is arranged on the upper end cover. The upper piston assembly is arranged at the upper part of the inner side of the upper shell and comprises an upper outer piston, an upper inner piston and a spring assembly. The lower piston assembly is arranged at the lower part of the inner side of the upper shell and comprises a lower outer piston and a lower inner piston. One side of the upper outer piston is provided with a magnet, and the magnet and the upper outer piston synchronously move. The Hall switch assembly comprises a side shell, a Hall switch, a circuit board and a circuit socket, wherein the side shell is fixed on the outer side of the upper part of the upper shell. The Hall switches are arranged from top to bottom in sequence, and all the Hall switches are electrically connected with the circuit board. The invention has the advantages of reduced height and size, convenient installation, reduced pedal force, improved driving comfort, pressure limiting function, simplified structural layout and reduced manufacturing cost.
Description
Technical Field
The invention relates to the technical field of automobile brake control, in particular to a suspension type foot brake valve with a three-gear Hall switch, which is applied to a vehicle with an eddy current reducer.
Background
The existing three-gear switch foot brake valve is formed by superposing a micro switch assembly and a pedal assembly on a conventional basic valve, the whole assembly is large in height and size and can only be assembled on a floor in a vehicle cab, the required installation space is large, and the three-gear switch foot brake valve cannot be applied to an application occasion with a small installation space or needing to assemble a hanging foot brake valve, such as a pedal integrated unit. The conventional brake valve has the defects that the required operating force is large, a driver is easy to fatigue in the driving process, and the driving comfort needs to be improved.
The conventional brake valve of the existing three-gear switch brake valve does not have a pressure limiting function, and when in full braking, the output air pressure is the same as the input air pressure, and the air pressure lifting of a vehicle system is limited. The existing three-gear switch retarder foot valve is formed by combining three independent micro switches, and the position of each micro switch needs to be adjusted respectively so as to enable the three switches to be opened in sequence at the appointed positions respectively. Because the three switches have smaller opening ranges, it is difficult to adjust the three micro switches at the designated positions, and much time is required. Thus, the prior art is subject to further development.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a suspension type foot brake valve with a three-gear Hall switch, which solves the problems of larger size, inconvenient installation, larger pedal force, difficult adjustment of three micro switch signals, poor driving comfort, limited air pressure lifting of a vehicle system and the like caused by the fact that the three-gear Hall switch foot brake valve has no pressure limiting function.
In order to solve the technical problems, the invention adopts the following technical scheme:
The utility model provides a suspension type foot brake valve with three shelves hall switch, includes casing, lower casing, goes up piston assembly, lower piston assembly and hall switch assembly down, the lower extreme of going up the casing links to each other with the upper end of lower casing is fixed, and the top of going up the casing is equipped with the upper end cover. The upper piston assembly is arranged at the upper part of the inner side of the upper shell and comprises an upper outer piston, an upper inner piston and a spring assembly, and the upper inner piston is arranged at the inner side of the upper outer piston. The inner side of the upper outer piston is provided with a push rod, and the upper part of the push rod is in sliding fit with the upper end cover. The lower piston assembly is disposed at an inner lower portion of the upper housing and includes a lower outer piston and a lower inner piston. One side of the upper outer piston is provided with a magnet through a retainer, and the magnet moves up and down synchronously with the outer piston under the drive of the retainer. The Hall switch assembly comprises a side shell, a Hall switch, a circuit board and a circuit socket, wherein the side shell is fixed on the outer side of the upper part of the upper shell. The Hall switches are arranged in the side shell from top to bottom in sequence, all the Hall switches are electrically connected with the circuit board, and the circuit board outputs an electric signal through the circuit socket.
Preferably, one side of the upper outer piston is nested and matched with a retainer, and the retainer is matched with a guide groove of the upper end cover in a sliding manner. The magnets are vertically arranged, the upper ends of the magnets are in nested fit with the retainer, and the movement path of the magnets corresponds to the directions of the three Hall switches.
Preferably, the outer wall of the upper outer piston is in sliding sealing fit with the upper shell, and the ejector rod is hot-pressed on the inner side of the upper part of the upper outer piston. The middle part of the upper shell is fixed with a piston guide sleeve, and the lower end of the upper inner piston is in sliding sealing fit with the piston guide sleeve. The upper end of the upper inner piston is provided with an outward flanging, the side wall of the flanging is in sliding sealing fit with the inner side of the upper outer piston, the inner side of the lower part of the upper outer piston is provided with an inward protruding limiting part, and the limiting part is positioned below the flanging of the upper inner piston.
Preferably, the spring assembly comprises a first spring, a second spring and a third spring, wherein the first spring and the second spring are arranged in the upper inner piston, and the second spring is sleeved outside the first spring. The third spring is arranged between the upper inner piston and the upper shell, the upper end of the third spring is contacted with the upper outer piston, and the lower end of the third spring is contacted with the piston guide sleeve.
Preferably, an upper valve assembly is arranged between the upper piston assembly and the lower piston assembly, and comprises an upper valve seat and an upper valve. The upper valve seat is fixedly and hermetically matched with the upper shell, and the inner side of the upper valve seat is in sliding fit with the lower inner piston. The upper valve is arranged at the upper end of the upper valve seat, the outer side of the upper valve is in sliding sealing fit with the outer side wall of the upper valve seat, and the inner side of the upper valve is in sliding sealing fit with the lower inner piston. And a fourth spring is arranged between the upper valve and the lower inner piston.
Preferably, an upper air inlet cavity is arranged between the upper shell and the upper valve, an upper air outlet cavity is arranged in the upper shell, and the upper air inlet cavity can be communicated with the upper air outlet cavity through the upper valve. A cavity is arranged between the upper surface of the lower outer piston and the upper shell, and the cavity is communicated with the upper exhaust cavity through a vent hole arranged in the upper shell.
Preferably, the outer side wall of the lower outer piston is in sliding sealing fit with the inner side wall of the lower part of the upper shell, and a fifth spring is arranged between the lower outer piston and the lower shell. The lower inner piston is positioned on the inner side of the lower outer piston, and the lower outer piston is in sliding sealing fit with the lower inner piston and can drive the lower inner piston to move downwards.
Preferably, a lower valve assembly is provided inside the lower housing, the lower valve assembly including a lower valve seat and a lower valve. The lower valve seat is fixedly matched with the lower shell in a sealing way, and the lower end of the lower valve seat is connected with a muffler. The lower valve is arranged at the upper end of the lower valve seat and is in sliding sealing fit with two outer side walls of the lower valve seat, and a sixth spring is arranged at the outer side of the lower valve seat.
Preferably, a lower air inlet cavity is arranged between the lower shell and the lower valve, a lower air outlet cavity is arranged between the lower shell and the lower outer piston, and the lower air inlet cavity can be communicated with the lower air outlet cavity through the lower valve.
Preferably, a lip-shaped sealing ring is arranged on the outer side wall of the ejector rod, and the ejector rod is in sealing fit with the upper end cover through the lip-shaped sealing ring.
By adopting the technical scheme, the invention has the beneficial technical effects that: the three-gear switch electric control foot brake valve disclosed by the invention is small in overall height dimension and is in a suspension type foot brake valve form, and is suitable for being installed in various application occasions. The mode that adopts hall switch subassembly replaces current micro-gap switch subassembly's form, comes control follow-up retarded opening, simple to operate, and the life-span is longer, and the reliability is higher, and the valve body is non-contact cooperation and uses with switch subassembly, if need not electric signal output, can take switch subassembly off, and basic valve body normal use. The suspension type foot brake valve reduces pedal force and improves driving comfort. The three-gear switch electric control foot brake valve has a pressure limiting function, can realize high-pressure input and low-pressure output, and can realize pressure lifting of a vehicle system, and the maximum brake pressure of a brake end can be limited to a required pressure value, so that the pressure limiting valve and a corresponding connector are reduced, the pipeline layout is simplified, and the cost is reduced.
Drawings
Fig. 1 is a schematic structural diagram of a suspension foot brake valve with a three-gear hall switch.
FIG. 2 is a schematic cross-sectional view of a section of a suspension foot brake valve with a three-position Hall switch.
FIG. 3 is a schematic cross-sectional view of another cross-section of a suspension foot brake valve with a three-position Hall switch.
Fig. 4 is a schematic view of a portion of fig. 1, showing a hall switch assembly.
Fig. 5 is a schematic view of another portion of fig. 1, showing the upper end cap.
Fig. 6 is a schematic view of a further part of fig. 1, showing the cage.
Detailed Description
The invention is described in detail below with reference to the attached drawing figures:
Referring to fig. 1 to 6, a suspension foot brake valve with a three-gear hall switch comprises an upper shell 11, a lower shell 12, an upper piston assembly 2, a lower piston assembly 3 and a hall switch assembly 4, wherein the lower end of the upper shell 11 is fixedly connected with the upper end of the lower shell 12, and an upper end cover 13 is arranged at the top of the upper shell 11. The upper piston assembly 2 is provided at an inner upper portion of the upper housing 11, and includes an upper outer piston 21, an upper inner piston 22, and a spring assembly, the upper inner piston 22 being provided inside the upper outer piston 21. The inner side of the upper outer piston 21 is provided with a mandril 14, and the upper part of the mandril 14 is in sliding fit with the upper end cover 13. The outer side wall of the ejector rod 14 is provided with a lip-shaped sealing ring 15, and the ejector rod 14 is in sealing fit with the upper end cover 13 through the lip-shaped sealing ring 15.
The upper outer piston 21 is provided with a magnet 16 at one side, the magnet 16 is vertically arranged, the upper end of the magnet 16 is fixedly connected with the upper end of the upper outer piston 21 through a retainer 17, the retainer 17 is semicircular and is in clearance nesting fit with the upper outer piston 21, meanwhile, the retainer 17 is arranged in a guide groove 131 of the upper end cover 13, the upper outer piston 21 can only drive the retainer 17 to vertically move but not rotate, and the magnet 16 and the upper outer piston 21 synchronously move up and down through the retainer 17. The hall switch assembly 4 includes a side case 41, a hall switch 42, a circuit board 43, and a circuit socket 44, and the side case 41 is fixed to the upper outer side of the upper case 11. Three hall switches 42 are provided, the three hall switches 42 are sequentially arranged in the side shell 41 from top to bottom, all the hall switches 42 are electrically connected with the circuit board 43, and the circuit board 43 outputs an electric signal through the circuit socket 44. The magnets 16 are vertically arranged, the upper ends of the magnets are in nested fit with the retainers 17, and the vertical movement track of the magnets 16 corresponds to the forward directions of the three Hall switches 42. The ejector rod 14 moves downwards together with the outer piston 21 under the action of pedal force, the outer piston 21 drives the magnet 16 to move downwards, the magnetic field intensity around the Hall switch is gradually enhanced from top to bottom in the process of downwards moving the magnet, the conduction threshold of the Hall switch is reached, and then the circuit loop is conducted. The hall switch assembly 4 is structured to set the position distribution of the three hall switches 42 in height according to the position of the product switch signal output. As the pedal angle increases, the three hall switches 42 are turned on in turn and transmit the switch signals to the electronic circuit processing system of the circuit board. The three paths of electric signals are connected with the retarder to generate non-contact braking efficiency so as to perform auxiliary braking.
The hall switch assembly 4 has the characteristics of no contact, low power consumption, long service life, high response frequency, high sensitivity, lower power consumption and the like, and the interior of the hall switch assembly is sealed and filled into a whole by adopting epoxy resin, so that the hall switch assembly can reliably work in various severe environments. The hall switch assembly 4 controls the retarder to start working and the speed of the vehicle is slowed down or stopped. The hall switch assembly 4 also has two other functions, one of which is to disengage the vehicle in cruise control from cruise mode. Another function is to turn on a brake light to alert other vehicles that the vehicle is decelerating or stopping.
The outer wall of the upper outer piston 21 is in sliding sealing fit with the upper shell 11, and the ejector rod 14 is pressed on the inner side of the upper part of the upper outer piston 21 in an interference manner. The middle part of the upper shell 11 is fixed with a piston guide sleeve 18, and the lower end of an upper inner piston 22 is in sliding sealing fit with the piston guide sleeve 18. The upper end of the upper inner piston 22 is provided with an outward flanging, the side wall of the flanging is in sliding sealing fit with the inner side of the upper outer piston 21, the inner side of the lower part of the upper outer piston 21 is provided with an inward protruding limiting part, and the limiting part is positioned below the flanging of the upper inner piston 22. The spring assembly comprises a first spring 23, a second spring 24 and a third spring 25, wherein the first spring 23 and the second spring 24 are arranged in the upper inner piston 22, and the second spring 24 is sleeved outside the first spring 23. The third spring 25 is disposed between the upper inner piston 22 and the upper housing 11, and the upper end of the third spring 25 is in contact with the upper outer piston 21 and the lower end thereof is in contact with the piston guide sleeve 18. The ejector rod 14 is driven by pedal force to move the upper outer piston 21 downwards, the upper outer piston 21 drives the upper inner piston 22 to move downwards through the first spring 23 and the second spring 24, and after the pedal force is released, the third spring 25 drives the upper outer piston 21 to move upwards, and the limiting part of the upper outer piston 21 drives the upper inner piston 22 to move upwards.
The lower piston assembly 3 is located below the upper piston assembly 2, and the lower piston assembly 3 is disposed at the inner lower portion of the upper housing 11, and includes a lower outer piston 31 and a lower inner piston 32. The outer side wall of the lower outer piston 31 is slidably and sealingly engaged with the inner side wall of the lower portion of the upper housing 11, and the lower outer piston 31 is movable up and down with respect to the upper housing 11. A cavity 9 is provided between the upper surface of the lower outer piston 31 and the upper housing 11, and the cavity 9 communicates with the upper exhaust chamber 62 provided in the upper housing 11 through a vent hole 91 provided in the upper housing 21. The lower outer piston 31 moves downwards under the pressure of the gas in the cavity 9, a fifth spring 33 is arranged between the lower outer piston 31 and the lower shell 12, when the lower outer piston 31 moves downwards under the pressure of the gas in the cavity 9, the fifth spring 33 is compressed, and when the outer piston 31 is released under the pressure of the gas in the cavity 9, the lower outer piston 31 moves upwards under the action of the fifth spring 33. The lower inner piston 32 is located inside the lower outer piston 31, the lower outer piston 31 is in sliding sealing fit with the lower inner piston 32, and the lower outer piston 31 can drive the lower inner piston 32 to move downwards.
An upper valve assembly 5 is arranged between the upper piston assembly 2 and the lower piston assembly 3, and the upper valve assembly 5 comprises an upper valve seat 51 and an upper valve 52. The upper valve seat 51 is fixedly and hermetically engaged with the inner side wall of the upper housing 11, and the inner side of the upper valve seat 51 is slidably engaged with the lower inner piston 32. The upper valve 52 is provided at the upper end of the upper valve seat 51, and has an outer side slidably engaged with the outer side wall of the upper valve seat 51 and an inner side slidably engaged with the lower inner piston 32. A fourth spring 53 is provided between the upper valve 52 and the lower inner piston 32. An upper air inlet cavity 61 is arranged between the upper shell 11 and the upper valve 52, the upper air inlet cavity 61 is used for air inlet through an upper air inlet arranged on the side wall of the upper shell 11, an upper air outlet cavity 62 is arranged in the upper shell 11, the upper air outlet cavity 62 is used for air outlet through an upper air outlet arranged on the side wall of the upper shell 11, and the upper air inlet cavity 61 can be communicated with the upper air outlet cavity 62 through an upper air outlet valve between the upper valve 52 and the upper shell 11. A cavity is provided between the upper surface of the lower outer piston 31 and the upper housing 11, and communicates with the upper exhaust chamber 62.
When the upper inner piston 22 is not in contact with the upper valve 52 before braking of the vehicle, the top of the upper valve 52 is in contact with the upper housing 11 and the upper exhaust valve is closed. When the vehicle is braked, the ejector rod 14 is subjected to stepping force, the ejector rod 14, the upper outer piston 21 and the upper inner piston 22 move downwards together, when the upper inner piston 22 contacts with the upper valve 52 and drives the upper valve 52 to move downwards, the upper exhaust valve is opened, compressed air in the upper air inlet cavity 61 enters the upper air outlet cavity 62 through the upper exhaust valve, and compressed air in the upper air outlet cavity 62 enters the first brake pipeline through the upper exhaust port. When the vehicle is released from braking, the ejector rod 14, the upper outer piston 21 and the upper inner piston 22 move upwards together under the action of the air pressure of the upper exhaust cavity 62 and the double action of the spring assembly, and after the acting force of the upper inner piston 22 is eliminated, the upper valve 52 moves upwards under the action of the fourth spring 53 to close the upper exhaust valve with the upper shell 11.
The lower housing 12 has a lower valve assembly 7 provided therein, and the lower valve assembly 7 includes a lower valve seat 71 and a lower valve 72. The lower valve seat 71 is fixedly and hermetically matched with the lower shell 12, and the muffler 10 is connected to the lower end of the lower valve seat 71. The lower valve 72 is sleeved at the upper end of the lower valve seat 71 and is in sliding sealing fit with the outer side wall of the lower valve seat 71, and a sixth spring 73 is arranged at the outer side of the lower valve seat 71. A lower air inlet cavity 81 is arranged between the lower shell 12 and the lower valve 72, the lower air inlet cavity 81 is used for air inlet through a lower air inlet arranged on the side wall of the lower shell 12, a lower air outlet cavity 82 is arranged between the lower shell 12 and the lower outer piston 31, the lower air outlet cavity 82 is used for air inlet through a lower air outlet arranged on the side wall of the lower shell 12, and the lower air inlet cavity 82 can be communicated with the lower air outlet cavity 82 through a lower air outlet valve arranged between the lower valve 72 and the lower shell 12.
When the vehicle is braked, the ejector rod 14 is subjected to stepping force, the ejector rod 14, the upper outer piston 21 and the upper inner piston 22 move downwards together, the upper exhaust valve is opened, compressed air of the upper air inlet cavity 61 enters the upper air outlet cavity 62 through the upper exhaust valve, and compressed air of the upper air outlet cavity 62 enters the first brake pipeline through the upper exhaust port. Compressed air in the upper exhaust chamber 62 simultaneously enters the cavity 9 through the vent hole 91 formed in the upper shell, the compressed air in the cavity drives the lower outer piston 31, the lower inner piston 32 and the lower valve 72 to move downwards, the lower exhaust valve is opened, high-pressure air in the lower air inlet chamber 81 enters the lower exhaust chamber 82 through the lower exhaust valve, and compressed air in the lower exhaust chamber 82 enters the second brake pipeline through the lower exhaust port. When the upper valve assembly 5 or the first brake pipe fails, the upper outer piston 21 can drive the upper inner piston 22 to move downwards through the first spring 23 and the second spring 24, the upper inner piston 22 drives the lower inner piston 32 to move downwards, the lower inner piston 32 drives the lower valve 72 to move downwards, the lower exhaust valve is opened, and compressed air in the lower air inlet cavity 81 enters the lower exhaust cavity 82.
During full braking, the upper outer piston is limited by the step of the shell, and the output air pressure is limited at the moment, so that the air pressure during output can be determined according to the two spring forces.
The three-gear switch electric control foot brake valve disclosed by the invention is small in overall height dimension and is in a suspension type foot brake valve form, and is suitable for being installed in various application occasions. The mode that adopts hall switch subassembly replaces current micro-gap switch subassembly's form, comes control follow-up retarded opening, simple to operate, and the life-span is longer, and the reliability is higher, and the valve body is non-contact cooperation and uses with switch subassembly, if need not electric signal output, can take switch subassembly off, and basic valve body normal use. The suspension type foot brake valve reduces pedal force and improves driving comfort. The three-gear switch electric control foot brake valve has a pressure limiting function, can realize high-pressure input and low-pressure output, and can realize pressure lifting of a vehicle system, and the maximum brake pressure of a brake end can be limited to a required pressure value, so that the pressure limiting valve and a corresponding connector are reduced, the pipeline layout is simplified, and the cost is reduced.
It should be understood that the above description is not intended to limit the invention to the particular embodiments disclosed, but to limit the invention to the particular embodiments disclosed, and that the invention is not limited to the particular embodiments disclosed, but is intended to cover modifications, adaptations, additions and alternatives falling within the spirit and scope of the invention.
Claims (10)
1. The suspension foot brake valve with the three-gear Hall switch comprises an upper shell, a lower shell, an upper piston assembly, a lower piston assembly and a Hall switch assembly, and is characterized in that the lower end of the upper shell is fixedly connected with the upper end of the lower shell, and an upper end cover is arranged at the top of the upper shell;
The upper piston assembly is arranged at the upper part of the inner side of the upper shell and comprises an upper outer piston, an upper inner piston and a spring assembly, wherein the upper inner piston is arranged at the inner side of the upper outer piston;
The inner side of the upper outer piston is provided with a push rod, and the upper part of the push rod is in sliding fit with the upper end cover;
The lower piston assembly is arranged at the lower part of the inner side of the upper shell and comprises a lower outer piston and a lower inner piston; one side of the upper outer piston is provided with a magnet through a retainer, and the magnet moves up and down synchronously with the outer piston under the drive of the retainer;
the Hall switch assembly comprises a side shell, a Hall switch, a circuit board and a circuit socket, wherein the side shell is fixed on the outer side of the upper part of the upper shell;
the Hall switches are arranged in the side shell from top to bottom in sequence, all the Hall switches are electrically connected with the circuit board, and the circuit board outputs an electric signal through the circuit socket.
2. The suspension foot brake valve with a three-gear hall switch of claim 1 wherein one side of the upper outer piston is mounted in nested engagement with a retainer which is in sliding engagement with the guide slot of the upper end cap; the magnets are vertically arranged, the upper ends of the magnets are in nested fit with the retainer, and the movement path of the magnets corresponds to the directions of the three Hall switches.
3. The suspension foot brake valve with a three-gear hall switch according to claim 1, wherein the outer wall of the upper outer piston is in sliding sealing fit with the upper shell, and the ejector rod is hot press-fitted on the upper inner side of the upper outer piston;
A piston guide sleeve is fixed in the middle of the upper shell, and the lower end of the upper inner piston is in sliding sealing fit with the piston guide sleeve;
the upper end of the upper inner piston is provided with an outward flanging, the side wall of the flanging is in sliding sealing fit with the inner side of the upper outer piston, the inner side of the lower part of the upper outer piston is provided with an inward protruding limiting part, and the limiting part is positioned below the flanging of the upper inner piston.
4. The suspension foot brake valve with a three-position hall switch of claim 3 wherein said spring assembly comprises a first spring, a second spring and a third spring, said first spring and said second spring being disposed within said upper inner piston, said second spring being disposed outside said first spring;
the third spring is arranged between the upper inner piston and the upper shell, the upper end of the third spring is contacted with the upper outer piston, and the lower end of the third spring is contacted with the piston guide sleeve.
5. The suspension foot brake valve with a three-gear hall switch of claim 1 wherein an upper valve assembly is disposed between the upper and lower piston assemblies, the upper valve assembly comprising an upper valve seat and an upper valve;
the upper valve seat is fixedly and hermetically matched with the upper shell, and the inner side of the upper valve seat is in sliding fit with the lower inner piston;
The upper valve is arranged at the upper end of the upper valve seat, the outer side of the upper valve is in sliding sealing fit with the outer side wall of the upper valve seat, and the inner side of the upper valve is in sliding sealing fit with the lower inner piston;
and a fourth spring is arranged between the upper valve and the lower inner piston.
6. The suspension foot brake valve with a three-gear hall switch of claim 5 wherein an upper air inlet chamber is provided between the upper housing and the upper valve, an upper air outlet chamber is provided within the upper housing, and the upper air inlet chamber is communicable with the upper air outlet chamber through the upper valve;
a cavity is arranged between the upper surface of the lower outer piston and the upper shell, and the cavity is communicated with the upper exhaust cavity through a vent hole arranged in the upper shell.
7. The suspension foot brake valve with a three-gear hall switch of claim 1 wherein the outer side wall of the lower outer piston is in sliding sealing engagement with the inner side wall of the lower portion of the upper housing, a fifth spring being disposed between the lower outer piston and the lower housing;
The lower inner piston is positioned on the inner side of the lower outer piston, and the lower outer piston is in sliding sealing fit with the lower inner piston and can drive the lower inner piston to move downwards.
8. The suspension foot brake valve with three-gear hall switch of claim 1 wherein the interior of the lower housing is provided with a lower valve assembly comprising a lower valve seat and a lower valve;
The lower valve seat is fixedly and hermetically matched with the lower shell, and the lower end of the lower valve seat is connected with a muffler;
The lower valve is arranged at the upper end of the lower valve seat and is in sliding sealing fit with two outer side walls of the lower valve seat, and a sixth spring is arranged at the outer side of the lower valve seat.
9. The suspension foot brake valve with a three-gear hall switch of claim 1 wherein a lower air inlet chamber is provided between the lower housing and the lower valve, a lower air outlet chamber is provided between the lower housing and the lower outer piston, and the lower air inlet chamber is communicable with the lower air outlet chamber through the lower valve.
10. The suspension foot brake valve with the three-gear Hall switch according to claim 1, wherein a lip-shaped sealing ring is arranged on the outer side wall of the ejector rod, and the ejector rod is in sealing fit with the upper end cover through the lip-shaped sealing ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811633967.8A CN109606342B (en) | 2018-12-29 | 2018-12-29 | Suspension type foot brake valve with three-gear Hall switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811633967.8A CN109606342B (en) | 2018-12-29 | 2018-12-29 | Suspension type foot brake valve with three-gear Hall switch |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109606342A CN109606342A (en) | 2019-04-12 |
| CN109606342B true CN109606342B (en) | 2024-08-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811633967.8A Active CN109606342B (en) | 2018-12-29 | 2018-12-29 | Suspension type foot brake valve with three-gear Hall switch |
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| CN (1) | CN109606342B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113665553A (en) * | 2020-05-15 | 2021-11-19 | 克诺尔商用车系统（重庆）有限公司 | Foot brake valve assembly with integrated control signal output device for vehicle control |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN209467125U (en) * | 2018-12-29 | 2019-10-08 | 威伯科汽车控制系统（中国）有限公司 | A kind of suspension type foot brake valves with three gear Hall switch |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5365791A (en) * | 1992-11-10 | 1994-11-22 | Allied-Signal Inc. | Signal generator |
| CN201970990U (en) * | 2011-01-26 | 2011-09-14 | 瑞立集团瑞安汽车零部件有限公司 | Brake master valve with electric control and air control dual circuit signals |
| CN204821537U (en) * | 2015-07-23 | 2015-12-02 | 瑞立集团瑞安汽车零部件有限公司 | Braking main valve |
-
2018
- 2018-12-29 CN CN201811633967.8A patent/CN109606342B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN209467125U (en) * | 2018-12-29 | 2019-10-08 | 威伯科汽车控制系统（中国）有限公司 | A kind of suspension type foot brake valves with three gear Hall switch |
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| CN109606342A (en) | 2019-04-12 |
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