CN113500990A - Electric control auxiliary braking system of relay valve - Google Patents
Electric control auxiliary braking system of relay valve Download PDFInfo
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- CN113500990A CN113500990A CN202110988631.9A CN202110988631A CN113500990A CN 113500990 A CN113500990 A CN 113500990A CN 202110988631 A CN202110988631 A CN 202110988631A CN 113500990 A CN113500990 A CN 113500990A
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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
- B60T15/18—Triple or other relay valves which allow step-wise application or release and which are actuated by brake-pipe pressure variation to connect brake cylinders or equivalent to compressed air or vacuum source or atmosphere
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- Valves And Accessory Devices For Braking Systems (AREA)
Abstract
An electric control auxiliary braking system of a relay valve comprises an upper cover, a middle shell and a lower body which are sequentially connected from top to bottom, wherein through holes which are communicated with each other are arranged in the upper cover, the middle shell and the lower body to form a cavity, a linkage rod and a piston are arranged in the cavity from top to bottom, a valve and an inner cover are arranged in the piston, the valve and the inner cover can move relatively, a middle spring is arranged outside the valve and the inner cover, the upper end and the lower end of the middle spring are respectively abutted against the lower end of the valve and the lower end of the inner cover, a lower cover is arranged on the lower part of the lower body, a lower spring is arranged in the lower cover, and the upper end and the lower end of the lower spring are respectively abutted against the lower end of the inner cover and the inner side of the lower cover; the brake force can be changed according to different loads, the brake effect is good, the service life of the relay valve is prolonged, and the accident probability caused by failure of the relay valve is reduced.
Description
The technical field is as follows:
the invention relates to the technical field of automobile braking, in particular to an electronic control auxiliary braking system of a relay valve.
Background art:
at present, the vehicle runs at an increasingly fast speed, the requirement on a brake system is also increasingly high, the response speed of the brake system is required to be fast, the brake system is required to have linearity and difficult locking, and when a control gas circuit and a pipeline suddenly break down, a certain braking force is required. The conventional relay valve cannot identify light and heavy vehicles in the braking process, different braking force is applied to the vehicles, the insufficient braking force of the heavy vehicles is easily caused, the braking time is prolonged, the braking distance is increased, and the phenomena of empty vehicles or light vehicles locking are caused. When the electric control relay valve breaks down, the electric signal cannot respond, display or prompt, so that the pneumatic line control brake system fails, and traffic accidents are easily caused.
The invention content is as follows:
in order to solve the problems and overcome the defects of the prior art, the invention provides the electric control auxiliary braking system of the relay valve, which changes the braking force according to different loads, has good braking effect, prolongs the service life of the relay valve and reduces the accident probability caused by the failure of the relay valve.
In order to achieve the purpose, the electric control auxiliary braking system of the relay valve provided by the invention comprises an upper cover, a middle shell and a lower body which are sequentially connected from top to bottom, wherein through holes which are mutually communicated are arranged in the upper cover, the middle shell and the lower body to form a cavity, a linkage rod and a piston are arranged in the cavity from top to bottom, a valve and an inner cover are arranged in the piston, the valve and the inner cover can move relatively, a middle spring is arranged outside the valve and the inner cover, the upper end and the lower end of the middle spring are respectively abutted against the lower end of the valve and the lower end of the inner cover, a lower cover is arranged at the lower part of the lower body, a lower spring is arranged in the lower cover, and the upper end and the lower end of the lower spring are respectively abutted against the lower end of the inner cover and the inner side of the lower cover;
the middle upper part of the linkage rod is provided with an upper diaphragm, and the periphery of the upper diaphragm is extruded and fixed at the junction of the upper cover and the middle shell; the middle lower part of the linkage rod is provided with a lower diaphragm, and the periphery of the lower diaphragm is extruded and fixed at the junction of the middle shell and the lower body;
an upper spring is arranged below the lower diaphragm, the upper spring is sleeved outside the linkage rod, and the upper end and the lower end of the upper spring are respectively abutted against the linkage rod and the lower body;
the cavity is divided into a plurality of cavities by the upper diaphragm, the middle shell, the lower diaphragm and the lower body, the upper diaphragm, the linkage rod and the upper cover enclose a cavity A, the middle shell and the linkage rod enclose a cavity B, the middle shell, the linkage rod and the lower diaphragm enclose a cavity C, the linkage rod, the lower body and the lower diaphragm enclose a cavity E, the lower body, the valve and the inner cover enclose a cavity D, and the valve and the inner cover enclose an exhaust cavity;
one side of the middle shell is provided with an electromagnetic valve A and an electromagnetic valve B, one side of the lower body is provided with a pressure regulating device A and a pressure regulating device B, the electromagnetic valve A is communicated with the pressure regulating device A, and the electromagnetic valve B is communicated with the pressure regulating device B; the electromagnetic valve A is communicated with the cavity A and the cavity B, and the electromagnetic valve B is communicated with the cavity A and the cavity C;
the electromagnetic valve A is connected with the weight sensing switch A in series, and the electromagnetic valve B is connected with the weight sensing switch B in series.
Furthermore, a control air inlet is formed in the upper portion of the upper cover, one end of the control air inlet is communicated with the cavity A, and the other end of the control air inlet is communicated with a foot-controlled pedal air source.
Furthermore, a brake air outlet is arranged on one side of the lower body, one end of the brake air outlet is communicated with the chamber E, and the other end of the brake air outlet is communicated with a brake mechanism; one side of the lower body is provided with an air storage tank air inlet, one end of the air storage tank air inlet is communicated with an air storage tank, the other end of the air storage tank air inlet is communicated with the cavity D, and the middle of the air storage tank air inlet is communicated with the pressure regulating device A and the pressure regulating device B.
Furthermore, the lower part of the piston is provided with an exhaust hole, one end of the exhaust hole is communicated with the exhaust chamber, and the other end of the exhaust hole is communicated with the outside atmosphere.
Furthermore, the pressure regulating device A and the pressure regulating device B are of the same structure and respectively comprise an adjusting screw, an adjusting spring and a one-way valve which are arranged in the lower body and are sequentially arranged along the horizontal direction; the lower ends of the electromagnetic valve A and the electromagnetic valve B are respectively communicated with an air inlet channel A and an air inlet channel B, and the air inlet channel A and the air inlet channel B are both communicated with an air inlet of the air storage tank; the one-way valve is positioned at the communication position of the air inlet channel A and the air inlet channel B and the air inlet of the air storage tank.
Further, solenoid valve A upper end is provided with air flue A, and solenoid valve B upper end is provided with air flue B, and cavity A intercommunication has total air flue, and air flue A and air flue B all communicate with total air flue.
The brake lamp is connected in parallel to the main loop, and the pedal is connected in series to the main loop.
Furthermore, the lower part of the lower cover is communicated with the outside atmosphere, and the lower part of the lower cover is provided with a dust cover.
The vehicle body further comprises a pressing device arranged on the vehicle body, the pressing device comprises a pressing rod, a return spring and an insulating support, the pressing rod is of a nail-shaped structure, the lower end of the pressing rod extends into the insulating support, and the upper end and the lower end of the return spring are respectively abutted against the upper end of the pressing rod and the upper end of the insulating support; two through holes with different horizontal positions are arranged at the middle lower part of the insulating support, a weight sensing switch A is arranged in the through hole with the higher horizontal position, and a weight sensing switch B is arranged in the through hole with the lower horizontal position.
The invention has the beneficial effects that:
the electric control auxiliary braking system of the relay valve provided by the invention enables the relay valve to provide corresponding braking force under the condition of different vehicle-mounted weights, and is additionally provided with the pressure regulating device, so that the control air pressure is regulated according to the actual condition, and the optimal braking effect is achieved. All mechanical control functions of the conventional common relay valve can be performed when the electric control fails, the service life of the electric control relay valve is prolonged, and the probability of accidents caused by failure of the relay valve is reduced.
Description of the drawings:
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a partially enlarged schematic view of the present invention;
FIG. 3 is a schematic circuit connection diagram of the present invention;
FIG. 4 is an enlarged schematic view of the hold-down device of the present invention;
in the drawings: 1. the device comprises an upper cover, 2, a middle shell, 3, a linkage rod, 4, a valve, 5, an inner cover, 6, a lower body, 7, a piston, 10, a lower cover, 11, a dust cover, 12, a lower spring, 13, pressure regulating devices A, 14, pressure regulating devices B, 15, an upper spring, 16, a lower diaphragm, 17, an upper diaphragm, 18, a sealing ball, 19, a middle spring, 21, adjusting screws A,22, adjusting springs A, 23, adjusting springs B, 24, adjusting screws B, 25, one-way valves B, 26 and a one-way valve A;
101. chamber a, 102, chamber B, 103, chamber C, 104, chamber E, 105, vent, 106, total gas channel, 107, vent chamber;
201. control air inlets 202, brake air outlets 204, chambers D, 205, air storage tank inlets 207, air inlet channels A, 208, air inlet channels B, 209, air passages B, 210 and air passages A;
301. the electromagnetic valve A, 302, the electromagnetic valve B, 303, the weight sensing switch A, 304, the weight sensing switch B, 305, the brake lamp, 306 and the pedal;
401. a compression bar 402, a return spring 403 and an insulating bracket.
The specific implementation mode is as follows:
in order to make the implementation objects, technical solutions and advantages of the present invention clearer, the present invention will be described in more detail below with reference to fig. 1 to 4 of the accompanying drawings.
The invention provides an electric control auxiliary brake system of a relay valve, which comprises an upper cover 1, a middle shell 2 and a lower body 6 which are sequentially connected from top to bottom, wherein through holes which are mutually communicated are arranged inside the upper cover 1, the middle shell 2 and the lower body 6 to form a cavity, a linkage rod 3 and a piston 7 are arranged inside the cavity from top to bottom, a valve 4 and an inner cover 5 are arranged inside the piston 7, the valve 4 and the inner cover 5 can move relatively, a middle spring 19 is arranged outside the valve 4 and the inner cover 5, the upper end and the lower end of the middle spring 19 respectively abut against the lower end of the valve 4 and the lower end of the inner cover 5, a lower cover 10 is arranged at the lower part of the lower body 6, a lower spring 12 is arranged inside the lower cover 10, and the upper end and the lower end of the lower spring 12 respectively abut against the lower end of the inner cover 5 and the inner side of the lower cover 10; the middle upper part of the linkage rod 3 is provided with an upper membrane 17, and the periphery of the upper membrane 17 is extruded and fixed at the junction of the upper cover 1 and the middle shell 2; the middle lower part of the linkage rod 3 is provided with a lower diaphragm 16, and the periphery of the lower diaphragm 16 is extruded and fixed at the junction of the middle shell 2 and the lower body 6; an upper spring 15 is arranged below the lower diaphragm 16, the upper spring 15 is sleeved outside the linkage rod 3, and the upper end and the lower end of the upper spring 15 are respectively abutted against the linkage rod 3 and the lower body 6; the cavity is divided into a plurality of cavities by an upper diaphragm 17, a middle shell 2, a lower diaphragm 16 and a lower body 6, the upper diaphragm 17, a linkage rod 3 and an upper cover 1 enclose a cavity A101, the middle shell 2 and the linkage rod 3 enclose a cavity B102, the middle shell 2, the linkage rod 3 and the lower diaphragm 16 enclose a cavity C103, the linkage rod 3, the lower body 6 and the lower diaphragm 16 enclose a cavity E104, the lower body 6, a valve 4 and an inner cover 5 enclose a cavity D204, and the valve 4 and the inner cover 5 enclose an exhaust cavity 107; an electromagnetic valve A301 and an electromagnetic valve B302 are arranged on one side of the middle shell 2, a pressure regulating device A13 and a pressure regulating device B14 are arranged on one side of the lower body 6, the electromagnetic valve A301 is communicated with a pressure regulating device A13, and the electromagnetic valve B302 is communicated with a pressure regulating device B14; solenoid valve a301 is in communication with chamber a101 and chamber B102, and solenoid valve B302 is in communication with chamber a101 and chamber C103; the electromagnetic valve A301 is connected with the weight sensing switch A303 in series, and the electromagnetic valve B302 is connected with the weight sensing switch B304 in series; a control air inlet 201 is formed in the upper portion of the upper cover 1, one end of the control air inlet 201 is communicated with the chamber A101, and the other end of the control air inlet 201 is communicated with a foot-controlled pedal air source; a brake air outlet 202 is arranged on one side of the lower body 6, one end of the brake air outlet 202 is communicated with the chamber E104, and the other end of the brake air outlet 202 is communicated with a brake mechanism; one side of the lower body 6 is provided with an air storage tank inlet 205, one end of the air storage tank inlet 205 is communicated with an air storage tank, the other end of the air storage tank inlet 205 is communicated with the chamber D204, and the middle part of the air storage tank inlet 205 is communicated with both the pressure regulating device A13 and the pressure regulating device B14; an exhaust hole 105 is formed in the lower portion of the piston 7, one end of the exhaust hole 105 is communicated with an exhaust chamber 107, and the other end of the exhaust hole 105 is communicated with the outside atmosphere; the pressure regulating device A13 and the pressure regulating device B14 are of the same structure and respectively comprise an adjusting screw, an adjusting spring and a one-way valve which are arranged in the lower body 6 and are sequentially arranged along the horizontal direction; the lower ends of the electromagnetic valve A301 and the electromagnetic valve B302 are respectively communicated with an air inlet channel A207 and an air inlet channel B208, and the air inlet channel A207 and the air inlet channel B208 are both communicated with an air inlet 205 of an air storage tank; the one-way valves are positioned at the communication positions of the air inlet channels A207 and B208 and the air inlet 205 of the air storage tank; the upper end of the electromagnetic valve A301 is provided with an air passage A210, the upper end of the electromagnetic valve B302 is provided with an air passage B209, the chamber A101 is communicated with a main air passage 106, and the air passage A210 and the air passage B209 are both communicated with the main air passage 106; the brake lamp 305 is connected in parallel into a main loop, and the pedal 306 is connected in series into the main loop; the lower part of the lower cover 10 is communicated with the outside atmosphere, and the lower part of the lower cover 10 is provided with a dust cover 11; the vehicle body structure further comprises a pressing device arranged on the vehicle body, the pressing device comprises a pressing rod 401, a return spring 402 and an insulating support 403, the pressing rod 401 is of a nail-shaped structure, the lower end of the pressing rod 401 extends into the insulating support 403, and the upper end and the lower end of the return spring 402 are respectively abutted against the upper end of the pressing rod 401 and the upper end of the insulating support 403; two through holes with different horizontal positions are arranged at the middle lower part of the insulating bracket 403, a weight sensing switch A303 is arranged in the through hole with the higher horizontal position, and a weight sensing switch B304 is arranged in the through hole with the lower horizontal position.
One of the embodiments of the invention is as follows:
the upper cover 1, the middle shell 2 and the lower body 6 are sequentially connected from top to bottom, through holes which are communicated with each other are formed in the upper cover 1, the middle shell 2 and the lower body 6 to form a cavity, a linkage rod 3 and a piston 7 are arranged in the cavity from top to bottom, a valve 4 and an inner cover 5 are arranged in the piston 7, the valve 4 and the inner cover 5 can move relatively, a middle spring 19 is arranged outside the valve 4 and the inner cover 5, the upper end and the lower end of the middle spring 19 are respectively abutted against the lower end of the valve 4 and the lower end of the inner cover 5, a lower cover 10 is arranged on the lower portion of the lower body 6, a lower spring 12 is arranged in the lower cover 10, and the upper end and the lower end of the lower spring 12 are respectively abutted against the lower end of the inner cover 5 and the inner side of the lower cover 10;
the middle upper part of the linkage rod 3 is provided with an upper membrane 17, and the periphery of the upper membrane 17 is extruded and fixed at the junction of the upper cover 1 and the middle shell 2;
the middle lower part of the linkage rod 3 is provided with a lower diaphragm 16, and the periphery of the lower diaphragm 16 is extruded and fixed at the junction of the middle shell 2 and the lower body 6;
an upper spring 15 is arranged below the lower diaphragm 16, the upper spring 15 is sleeved outside the linkage rod 3, and the upper end and the lower end of the upper spring 15 are respectively abutted against the linkage rod 3 and the lower body 6;
the cavity is divided into a plurality of cavities by an upper diaphragm 17, a middle shell 2, a lower diaphragm 16 and a lower body 6, the upper diaphragm 17, a linkage rod 3 and an upper cover 1 enclose a cavity A101, the middle shell 2 and the linkage rod 3 enclose a cavity B102, the middle shell 2, the linkage rod 3 and the lower diaphragm 16 enclose a cavity C103, the linkage rod 3, the lower body 6 and the lower diaphragm 16 enclose a cavity E104, the lower body 6, a valve 4 and an inner cover 5 enclose a cavity D204, and the valve 4 and the inner cover 5 enclose an exhaust cavity 107;
an electromagnetic valve A301 and an electromagnetic valve B302 are arranged on one side of the middle shell 2, a pressure regulating device A13 and a pressure regulating device B14 are arranged on one side of the lower body 6, the electromagnetic valve A301 is communicated with a pressure regulating device A13, and the electromagnetic valve B302 is communicated with a pressure regulating device B14; solenoid valve a301 is in communication with chamber a101 and chamber B102, and solenoid valve B302 is in communication with chamber a101 and chamber C103; the electromagnetic valve A301 is connected with the weight sensing switch A303 in series, and the electromagnetic valve B302 is connected with the weight sensing switch B304 in series;
the pressure regulating device A13 comprises an adjusting screw A21, an adjusting spring A22 and a one-way valve A26 which are arranged in the lower body 6 and are arranged in sequence along the horizontal direction; the lower end of the electromagnetic valve A301 is communicated with an air inlet channel A207, and the air inlet channel A207 is communicated with an air inlet 205 of an air storage tank; the check valve A26 is located the intercommunication department of intake duct A207 and gas holder air inlet 205, through the position of precession adjusting screw A21, can change the extrusion pressure degree to adjusting spring A22 to the adjustment is enough to push away the atmospheric pressure intensity of check valve A26, realizes the pressure regulating effect. When the pressure is larger than the elastic force of the spring, the check valve A26 moves transversely, so that the air inlet 205 of the air storage tank is communicated with the air inlet channel A207, and the air can enter the electromagnetic valve A301.
The pressure regulating device B14 comprises an adjusting screw B24, an adjusting spring B23 and a one-way valve B25 which are arranged inside the lower body 6 and are arranged in sequence along the horizontal direction; the lower end of the electromagnetic valve B302 is communicated with an air inlet channel B208, and the air inlet channel B208 is communicated with an air inlet 205 of an air storage tank; the check valve B25 is located at the communication position of the air inlet channel B208 and the air inlet 205 of the air storage tank, and the squeezing force of the adjusting spring B23 can be changed by screwing the position of the adjusting screw B24, so that the air pressure intensity enough for pushing open the check valve B25 is adjusted, and the pressure adjusting effect is achieved. When the pressure is larger than the elastic force of the spring, the check valve B25 moves transversely, so that the air inlet 205 of the air storage tank is communicated with the air inlet channel B208, and the air can enter the electromagnetic valve B302.
The pressing device is arranged on the vehicle body and comprises a pressing rod 401, a return spring 402 and an insulating support 403, the pressing rod 401 is of a nail-shaped structure, the lower end of the pressing rod 401 extends into the insulating support 403, and the upper end and the lower end of the return spring 402 are respectively abutted against the upper end of the pressing rod 401 and the upper end of the insulating support 403; the lower part is provided with two through-holes that horizontal position is different in the insulation is direct, is provided with sense heavy switch A303 in the higher through-hole of horizontal position, is provided with sense heavy switch B304 in the lower through-hole of horizontal position, and the lower extreme of depression bar 401 is provided with the inclined plane, touches the cambered surface of sense heavy switch A303 and sense heavy switch B304 tip and just can transversely extrude it in the in-process of pushing down to accomplish and trigger.
According to the installation positions of the weight sensing switch A303 and the weight sensing switch B304, different critical weights of the vehicle load can be adjusted, and in other embodiments, 1 or more than 2 weight sensing switches can be arranged.
The specific working principle is as follows: the relay valve can be divided into electric control or mechanical control according to actual conditions, and the mechanical control has all functions of a common relay valve under the condition that the electric control fails.
When the electric control system works normally, the weight sensing switch is divided into three states according to the difference of the vehicle weight:
in the first state, when the load does not reach 30% of the full load weight, neither the weight sensing switch a303 nor the weight sensing switch B304 is turned on, nor the solenoid valve a301 or the solenoid valve B302 is turned on. At this time, the upper ends of the solenoid valves a301 and B302 are opened, and the lower ends are closed. When a driver steps on the pedal 306, gas enters the chamber a101 from the control gas inlet 201, then enters two branches, namely the gas channel a210 and the gas channel B209, then enters the chamber B102 and the chamber C103 through the electromagnetic valve a301 and the electromagnetic valve B302 respectively, the linkage rod 3 is pushed to move downwards under the action of gas pressure, the linkage rod 3 pushes the valve 4 to move downwards, the valve 4 is separated from the piston 7, the gas enters the chamber D204 through the gas storage tank inlet 205, then enters the chamber E104, and enters the brake gas chamber through the brake gas outlet 202, so that the purpose of braking is achieved.
When the driver lifts off the pedal 306, the air in the chamber a101, the chamber B102 and the chamber C103 is exhausted from the control air inlet 201, due to the exhaust of the air in the chamber a101, the chamber B102 and the chamber C103, the linkage rod 3 is pushed to move upwards under the pressure of the air in the chamber E104 and the elastic force of the upper spring 15, the valve 4 moves upwards under the elastic force of the middle spring 19, the valve 4 moves upwards to be closed with the piston 7, the chamber D204 is disconnected from the chamber E104, the linkage rod 3 continues to move upwards under the action of the air in the chamber E104 and the elastic force of the upper spring 15, the linkage rod 3 is separated from the valve 4, the chamber E104 is communicated with the exhaust chamber 107, the air in the chamber E104 enters the exhaust chamber 107, and the air is exhausted to the atmosphere through the exhaust hole 105, so that one-time braking is completed.
In the second state, when the trailer is loaded with cargo 30% -70% of full load, the weight sensing switch A303 is switched on, and because the electromagnetic valve A301 is connected with the brake lamp line in parallel, when the driver steps on the pedal 306, the electromagnetic valve A301 starts to work, the upper end of the electromagnetic valve A301 is closed, the lower end of the electromagnetic valve A301 is opened, the electromagnetic valve B302 does not work, the upper end of the electromagnetic valve B302 is opened, and the lower end of the electromagnetic valve B302 is closed; the gas of the gas storage cylinder enters the electromagnetic valve A301 from the gas storage cylinder gas inlet 205 through the pressure regulating device A13, then enters the chamber B102, drives the linkage rod 3 to move downwards to push away the valve 4, the high-pressure gas of the gas storage cylinder enters the chamber E104 from the gas storage cylinder gas inlet 205 through the chamber D204, and then enters the brake chamber through the brake gas outlet 202 to brake, after about 0.4 second, the control gas enters the chamber A101 through the control gas inlet 201, because the electromagnetic valve B302 does not work, the upper end of the electromagnetic valve B302 is opened, the lower-end gas enters the electromagnetic valve B302 from the upper end of the electromagnetic valve B302, then enters the chamber C103, one block pushes the linkage rod 3 to move downwards to continuously press the valve 4 downwards to increase the braking force, because the chamber C103 is the high-pressure gas passing through the gas storage cylinder, the braking pressure is high when the electromagnetic valve A301 and the electromagnetic valve B302 do not work, the braking effect is better.
When a driver releases a pedal 306, the electromagnetic valve A301 is disconnected, gas in the chamber B102 and the chamber C103 can enter the chamber A101 through the interiors of the electromagnetic valve A301 and the electromagnetic valve B302 and is exhausted along with the control gas inlet 201, due to the fact that the gas in the chamber A101, the chamber B102 and the chamber C103 is exhausted, the linkage rod 3 is pushed to move upwards under the pressure of the gas in the chamber E104 and the elastic force of the upper spring 15, the valve 4 moves upwards under the elastic force of the middle spring 19, the valve 4 moves upwards to be closed with the piston 7, the chamber D204 is disconnected from the chamber E104, the linkage rod 3 continues to move upwards under the action of the pressure in the chamber E104 and the elastic force of the upper spring 15, the linkage rod 3 is separated from the valve 4, the chamber E104 is communicated with the exhaust chamber 107, the gas in the chamber E104 enters the exhaust chamber 107, and the gas is exhausted to the atmosphere through the exhaust hole 105, and primary braking is completed.
In the third state, when the trailer is loaded with more than 70% of full load, the weight sensing switch A303 and the sensing switch 304 are simultaneously switched on, because the electromagnetic valve A301 and the electromagnetic valve B302 are simultaneously connected with the brake lamp circuit in parallel, when the driver steps on the pedal 306, the electromagnetic valve A301 and the electromagnetic valve B302 simultaneously work, the upper end inside the valve core of the electromagnetic valve is closed, the lower end is opened, the gas in the gas storage cylinder passes through the pressure regulating device A13 and the pressure regulating device B14 from the gas storage cylinder gas inlet 205, enters the electromagnetic valve A301 and the electromagnetic valve B302 simultaneously, then enters the chamber B102 and the chamber C103 respectively, the chamber B102 and the chamber C103 simultaneously drive the down of the linkage rod 3 to push open the valve 4, the high-pressure gas in the gas storage cylinder passes through the gas storage cylinder gas inlet 205, passes through the chamber D204, enters the chamber E104, flows to the brake chamber through the brake gas outlet 202 for braking, and the control gas passes through the control gas inlet 201 to enter the chamber A101 after about 0.4 second, the linkage rod 3 is pushed to move downwards together with the cavity B102 and the cavity C103, the valve 4 is continuously pressed downwards, the braking force is greatly increased, and the braking force is high when the electromagnetic valve A301 and the electromagnetic valve B302 do not work and the electromagnetic valve A301 works and the electromagnetic valve B302 does not work due to the fact that the control cavity is high-pressure gas obtained after the pressure of the air storage cylinder is adjusted, and a good braking effect can be achieved on heavy vehicle braking.
When the driver lifts off the pedal 306, the solenoid valve A301 and the solenoid valve B302 stop working at the same time, the upper end of the solenoid valve is opened and the air channel 106 is communicated, the gas passages with the pressure regulating device 13 and the pressure regulating device 14 are closed, the chamber a101, the chamber B102 and the chamber C103 are communicated, and gas is discharged from the control gas inlet 201, and since the gas is discharged from the chamber a101, the chamber B102 and the chamber C103, the linkage rod 3 is pushed to move upwards under the pressure of the gas in the chamber E104 and the elastic force of the upper spring 15, the valve 4 moves upwards under the elastic force of the middle spring 19, the valve 4 moves upwards to close the piston 7, the chamber D204 is disconnected from the chamber E104, under the action of the air pressure in the chamber E104 and the elastic force of the upper spring 15, the linkage rod 3 continues to move upwards, the linkage rod 3 is separated from the valve 4, the chamber E104 is communicated with the exhaust chamber 107, the gas in the chamber E104 enters the exhaust chamber 107, and the gas is exhausted to the atmosphere through the exhaust hole 105, so that primary braking is completed.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (9)
1. An automatically controlled auxiliary brake system of relay valve which characterized in that: comprises an upper cover (1), a middle shell (2) and a lower body (6) which are connected in sequence from top to bottom, the inner parts of the upper cover (1), the middle shell (2) and the lower body (6) are all provided with through holes which are mutually communicated and form a cavity, the cavity is internally provided with a linkage rod (3) and a piston (7) from top to bottom, the piston (7) is internally provided with a valve (4) and an inner cover (5), the valve (4) and the inner cover (5) can move relatively, a middle spring (19) is arranged outside the valve (4) and the inner cover (5), the upper end and the lower end of the middle spring (19) are respectively propped against the lower end of the valve (4) and the lower end of the inner cover (5), a lower cover (10) is arranged at the lower part of the lower body (6), a lower spring (12) is arranged in the lower cover (10), the upper end and the lower end of the lower spring (12) are respectively abutted against the lower end of the inner cover (5) and the inner side of the lower cover (10);
an upper diaphragm (17) is arranged at the middle upper part of the linkage rod (3), and the periphery of the upper diaphragm (17) is extruded and fixed at the junction of the upper cover (1) and the middle shell (2); a lower diaphragm (16) is arranged at the middle lower part of the linkage rod (3), and the periphery of the lower diaphragm (16) is extruded and fixed at the junction of the middle shell (2) and the lower body (6);
an upper spring (15) is arranged below the lower diaphragm (16), the upper spring (15) is sleeved outside the linkage rod (3), and the upper end and the lower end of the upper spring (15) are respectively abutted against the linkage rod (3) and the lower body (6);
the cavity is divided into a plurality of cavities by an upper diaphragm (17), a middle shell (2), a lower diaphragm (16) and a lower body (6), the upper diaphragm (17), a linkage rod (3) and an upper cover (1) enclose a cavity A (101), the middle shell (2) and the linkage rod (3) enclose a cavity B (102), the middle shell (2), the linkage rod (3) and the lower diaphragm (16) enclose a cavity C (103), the linkage rod (3), the lower body (6) and the lower diaphragm (16) enclose a cavity E (104), the lower body (6), a valve (4) and an inner cover (5) enclose a cavity D (204), and the valve (4) and the inner cover (5) enclose an exhaust cavity (107);
an electromagnetic valve A (301) and an electromagnetic valve B (302) are arranged on one side of the middle shell (2), a pressure regulating device A (13) and a pressure regulating device B (14) are arranged on one side of the lower body (6), the electromagnetic valve A (301) is communicated with the pressure regulating device A (13), and the electromagnetic valve B (302) is communicated with the pressure regulating device B (14); the solenoid valve A (301) is communicated with the chamber A (101) and the chamber B (102), and the solenoid valve B (302) is communicated with the chamber A (101) and the chamber C (103);
the electromagnetic valve further comprises a weight sensing switch A (303) and a weight sensing switch B (304), the electromagnetic valve A (301) is connected with the weight sensing switch A (303) in series, and the electromagnetic valve B (302) is connected with the weight sensing switch B (304) in series.
2. An electrically controlled auxiliary brake system for a relay valve according to claim 1, wherein: the upper cover (1) upper portion is provided with control gas inlet (201), the one end and the cavity A (101) intercommunication of control gas inlet (201), the other end intercommunication of control gas inlet (201) has foot control footboard air supply.
3. An electrically controlled auxiliary brake system for a relay valve according to claim 1, wherein: a brake air outlet (202) is formed in one side of the lower body (6), one end of the brake air outlet (202) is communicated with the chamber E (104), and the other end of the brake air outlet (202) is communicated with a brake mechanism; lower part of the body (6) one side is provided with gas holder air inlet (205), the one end intercommunication of gas holder air inlet (205) has the gas holder, the other end and cavity D (204) intercommunication of gas holder air inlet (205), the middle part and pressure regulating device A (13) and pressure regulating device B (14) of gas holder air inlet (205) all communicate.
4. An electrically controlled auxiliary brake system for a relay valve according to claim 1, wherein: an exhaust hole (105) is formed in the lower portion of the piston (7), one end of the exhaust hole (105) is communicated with an exhaust chamber (107), and the other end of the exhaust hole (105) is communicated with the outside atmosphere.
5. An electrically controlled auxiliary brake system for a relay valve according to claim 1, wherein: the pressure regulating device A (13) and the pressure regulating device B (14) are of the same structure and respectively comprise an adjusting screw, an adjusting spring and a one-way valve which are arranged in the lower body (6) and are sequentially arranged along the horizontal direction; the lower ends of the electromagnetic valve A (301) and the electromagnetic valve B (302) are respectively communicated with an air inlet channel A (207) and an air inlet channel B (208), and the air inlet channel A (207) and the air inlet channel B (208) are both communicated with an air inlet (205) of an air storage tank; the one-way valve is positioned at the communication position of the air inlet channel A (207) and the air inlet channel B (208) and the air inlet (205) of the air storage tank.
6. An electrically controlled auxiliary brake system for a relay valve according to claim 1, wherein: the upper end of the electromagnetic valve A (301) is provided with an air passage A (210), the upper end of the electromagnetic valve B (302) is provided with an air passage B (209), the chamber A (101) is communicated with a main air passage (106), and the air passage A (210) and the air passage B (209) are both communicated with the main air passage (106).
7. An electrically controlled auxiliary brake system for a relay valve according to claim 1, wherein: the brake system further comprises a pedal (306) and a brake lamp (305), wherein the brake lamp (305) is connected into the overall loop in parallel, and the pedal (306) is connected into the overall loop in series.
8. An electrically controlled auxiliary brake system for a relay valve according to claim 1, wherein: the lower part of the lower cover (10) is communicated with the outside atmosphere, and a dust cover (11) is arranged on the lower part of the lower cover (10).
9. An electrically controlled auxiliary brake system for a relay valve according to claim 1, wherein: the vehicle body structure is characterized by further comprising a pressing device arranged on the vehicle body, the pressing device comprises a pressing rod (401), a return spring (402) and an insulating support (403), the pressing rod (401) is of a nail-shaped structure, the lower end of the pressing rod (401) extends into the insulating support (403), and the upper end and the lower end of the return spring (402) are respectively abutted against the upper end of the pressing rod (401) and the upper end of the insulating support (403); two through holes with different horizontal positions are arranged at the middle lower part of the insulating support (403), a weight sensing switch A (303) is arranged in the through hole with the higher horizontal position, and a weight sensing switch B (304) is arranged in the through hole with the lower horizontal position.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110988631.9A CN113500990B (en) | 2021-08-26 | 2021-08-26 | Electric control auxiliary braking system of relay valve |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110988631.9A CN113500990B (en) | 2021-08-26 | 2021-08-26 | Electric control auxiliary braking system of relay valve |
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| CN113500990A true CN113500990A (en) | 2021-10-15 |
| CN113500990B CN113500990B (en) | 2022-04-08 |
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| CN202110988631.9A Active CN113500990B (en) | 2021-08-26 | 2021-08-26 | Electric control auxiliary braking system of relay valve |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113968204A (en) * | 2021-10-09 | 2022-01-25 | 山东康健汽车配件科技股份有限公司 | Automatically controlled auxiliary braking system of ABS relay valve |
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| CN112677947A (en) * | 2021-03-11 | 2021-04-20 | 天津所托瑞安汽车科技有限公司 | Proportional relay valve and pneumatic line control brake system |
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| US3456991A (en) * | 1967-11-13 | 1969-07-22 | Bendix Westinghouse Automotive | Relay emergency valve |
| US3504947A (en) * | 1968-10-03 | 1970-04-07 | Bendix Westinghouse Automotive | Service and emergency brake control valve |
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| CN113968204A (en) * | 2021-10-09 | 2022-01-25 | 山东康健汽车配件科技股份有限公司 | Automatically controlled auxiliary braking system of ABS relay valve |
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| Publication number | Publication date |
|---|---|
| CN113500990B (en) | 2022-04-08 |
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Denomination of invention: An electrically controlled auxiliary braking system with relay valve Effective date of registration: 20230214 Granted publication date: 20220408 Pledgee: Industrial and Commercial Bank of China Limited Liangshan sub branch Pledgor: Shandong Kangjian Automobile Technology Co.,Ltd. Registration number: Y2023980032601 |
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