CN107985284B - Off-highway wide vehicle pneumatic brake system and off-highway wide vehicle - Google Patents
Off-highway wide vehicle pneumatic brake system and off-highway wide vehicle Download PDFInfo
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- CN107985284B CN107985284B CN201710897273.4A CN201710897273A CN107985284B CN 107985284 B CN107985284 B CN 107985284B CN 201710897273 A CN201710897273 A CN 201710897273A CN 107985284 B CN107985284 B CN 107985284B
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- 230000001360 synchronised effect Effects 0.000 claims abstract description 50
- 230000001105 regulatory effect Effects 0.000 claims description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
- 230000001172 regenerating effect Effects 0.000 claims description 8
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002035 prolonged effect 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
- B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
- B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
- B60T13/24—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release the fluid being gaseous
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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
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- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Valves And Accessory Devices For Braking Systems (AREA)
- Braking Systems And Boosters (AREA)
Abstract
The invention provides an off-highway wide vehicle pneumatic braking system and an off-highway wide vehicle, and relates to the field of off-highway wide vehicles. The off-highway wide vehicle pneumatic braking system comprises a parking braking system; the parking brake system comprises an air source, a four-loop protection valve, a front air reservoir, a rear air reservoir, a hand brake valve, a front synchronous valve, a rear synchronous valve, a front relay valve, a rear right brake air chamber, a rear left brake air chamber, a front left brake air chamber and a front right brake air chamber; the air source is connected with a four-loop protection valve, one output port of the four-loop protection valve is connected with a front air reservoir, the other output port of the four-loop protection valve is connected with a rear air reservoir, the front air reservoir is connected with a hand brake valve, one air outlet of the hand brake valve is connected with a front synchronous valve, the other air outlet of the hand brake valve is connected with a rear synchronous valve, and the front air reservoir is also connected with an air inlet of the front synchronous valve. The off-road wide-body vehicle pneumatic braking system has high safety performance, and can ensure that front wheels and rear wheels are locked simultaneously during parking braking.
Description
Technical Field
The invention relates to the field of off-highway wide vehicles, in particular to an off-highway wide vehicle pneumatic braking system and an off-highway wide vehicle.
Background
At present, in vehicles of off-highway wide vehicle pneumatic braking systems, the braking mode adopted by general service braking is that a front wheel is one set of braking pipeline, a rear wheel is another set of pipeline, when one pipeline of the vehicle fails, the vehicle can run, and the vehicle has risks.
Disclosure of Invention
The invention aims to provide an off-highway wide vehicle pneumatic brake system, which utilizes a hand brake valve to act on a front synchronous valve and a rear synchronous valve, so that the front synchronous valve and the rear synchronous valve control a locking port of a brake air chamber, and front and rear wheels are locked simultaneously during parking braking, and the off-highway wide vehicle pneumatic brake system has higher safety performance.
It is another object of the present invention to provide an off-highway wideband vehicle having all of the functions of the off-highway wideband vehicle pneumatic brake system described above.
Embodiments of the present invention are implemented as follows:
an off-highway wide body vehicle pneumatic braking system comprises a parking braking system;
the parking brake system comprises an air source, a four-loop protection valve, a front air storage cylinder, a rear air storage cylinder, a hand brake valve, a front synchronous valve, a rear synchronous valve, a front relay valve, a rear right brake air chamber, a rear left brake air chamber, a front left brake air chamber and a front right brake air chamber;
the air source is connected with the four-loop protection valve, one of the output ports of the four-loop protection valve is connected with the front air reservoir, the other output port of the four-loop protection valve is connected with the rear air reservoir, the front air reservoir is connected with the hand brake valve, one of the air outlets of the hand brake valve is connected with the front synchronous valve, the other air outlet of the hand brake valve is connected with the rear synchronous valve, the front air reservoir is also connected with the air inlet of the front synchronous valve and the front relay valve, the front synchronous valve is also connected with the front relay valve, the front relay valve is also respectively connected with the front right brake chamber and the rear right brake chamber, the rear air reservoir is also connected with the air inlet of the rear synchronous valve and the rear relay valve, the rear relay valve and the rear synchronous valve are also respectively connected with the front left brake chamber and the rear left brake chamber.
In addition, the off-highway wide vehicle pneumatic brake system provided by the embodiment of the invention can also have the following additional technical characteristics:
in an alternative embodiment of the present invention, the off-highway wide body vehicle pneumatic brake system further comprises a service brake system;
the service brake system comprises an air source, a four-loop protection valve, a front air storage cylinder, a rear air storage cylinder, a foot brake valve, a front relay valve, a rear right brake air chamber, a rear left brake air chamber, a front left brake air chamber and a front right brake air chamber;
the air source is connected with the four-loop protection valve, one of the output ports of the four-loop protection valve is connected with the front air reservoir, the other output port of the four-loop protection valve is connected with the rear air reservoir, one of the air inlets of the foot brake valve is connected with the front air reservoir, the other air inlet of the foot brake valve is connected with the rear air reservoir, one of the air outlets of the foot brake valve is connected with the front relay valve, the other air outlet of the foot brake valve is connected with the rear relay valve, one air inlet of the front relay valve is connected with the front air reservoir, the front relay valve is also connected with the front right brake air chamber and the rear right brake air chamber respectively, one air inlet of the rear relay valve is connected with the rear air reservoir, and the rear relay valve is also connected with the front left brake air chamber and the rear left brake air chamber respectively.
In an alternative embodiment of the present invention, the off-highway wide body vehicle pneumatic brake system further comprises a combination dryer;
the combined dryer is connected between the air source and the four-loop protection valve.
In an alternative embodiment of the present invention, the off-highway wide body vehicle pneumatic brake system further comprises a regenerating air receiver;
the regenerating air receiver is arranged between the combined dryer and the four-loop protection valve.
In an alternative embodiment of the present invention, the air source is a compressor.
In an alternative embodiment of the present invention, the off-highway wide body vehicle pneumatic brake system further includes a pressure regulating valve;
the number of the pressure regulating valves is two, one pressure regulating valve is arranged between one output port of the four-loop protection valve and the front air cylinder, and the other pressure regulating valve is arranged between the other output port of the four-loop protection valve and the rear air cylinder.
In an alternative embodiment of the present invention, the off-highway wide body vehicle pneumatic brake system further includes a water drain valve;
the number of the water drain valves is two, one water drain valve is arranged at the bottom of the front air storage cylinder, and the other water drain valve is arranged at the bottom of the rear air storage cylinder.
In an alternative embodiment of the present invention, the off-highway wide body vehicle pneumatic brake system further includes an electromagnetic valve and an air horn;
the electromagnetic valve is connected with the front air reservoir, and the air horn is connected with the electromagnetic valve.
In an alternative embodiment of the invention, the compressor is powered by an engine.
The embodiment of the invention also provides an off-highway wide vehicle, which comprises the off-highway wide vehicle pneumatic braking system.
The embodiment of the invention has the beneficial effects that: the off-highway wide vehicle pneumatic braking system has reasonable structure and strong practicability, and can ensure that front and rear wheels are locked simultaneously during parking braking, so that the off-highway wide vehicle pneumatic braking system has higher safety performance.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic connection diagram of an air brake system of an off-road wide body vehicle according to embodiment 1 of the present invention.
Icon: 1-a compressor; 2-combination dryer; 3-regenerating air cylinders; 4-four-loop protection valve; 5-a front air cylinder; 6-a post-air reservoir; 7-a post-synchronization valve; 8-a rear right brake chamber; 9-a relay valve; 10-a rear left brake chamber; 11-hand brake valve; 12-foot brake valve; 13-a front relay valve; 14-front left brake chamber; 15-front right brake chamber; 16-a preamble valve; 17-air horn; 18-solenoid valve.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the present invention, it should be noted that, the terms "left", "right", "inner", and the like indicate an azimuth or a positional relationship based on the azimuth or the positional relationship shown in the drawings, or an azimuth or a positional relationship conventionally put in use of the inventive product, only for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or element to be referred to must have a specific azimuth, be configured and operated in a specific azimuth, and thus should not be construed as limiting the present invention.
In the description of the present invention, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed", "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Example 1
Referring to fig. 1, an embodiment of the present invention provides an air brake system for an off-road wide vehicle, which includes an air source, a combination dryer 2, a regenerative air reservoir 3, a four-circuit protection valve 4, a front air reservoir 5, a rear air reservoir 6, a hand brake valve 11, a foot brake valve 12, a front synchronization valve 16, a rear synchronization valve 7, a front relay valve 13, a rear relay valve 9, a rear right brake air chamber 8, a rear left brake air chamber 10, a front left brake air chamber 14, and a front right brake air chamber 15.
In this embodiment, the air source is a compressor 1 for generating compressed air, and the power of the compressor 1 is provided by an engine.
The non-public road wide body vehicle air pressure braking system comprises a service braking system and a parking braking system.
Referring to fig. 1, in the parking brake system, the following components are mainly used: the air source, the four-circuit protection valve 4, the front air reservoir 5, the rear air reservoir 6, the hand brake valve 11, the front synchronizing valve 16, the rear synchronizing valve 7, the front relay valve 13, the rear relay valve 9, the rear right brake air chamber 8, the rear left brake air chamber 10, the front left brake air chamber 14 and the front right brake air chamber 15.
Specifically, the air source is connected with a four-loop protection valve 4, one output port of the four-loop protection valve 4 is connected with a front air reservoir 5, and the other output port of the four-loop protection valve 4 is connected with a rear air reservoir 6.
The front air reservoir 5 is connected with the hand brake valve 11, one air outlet of the hand brake valve 11 is connected with the front synchronous valve 16, the other air outlet of the hand brake valve 11 is connected with the rear synchronous valve 7, the front air reservoir 5 is also connected with the air inlet of the front synchronous valve 16 and the front relay valve 13, the front synchronous valve 16 is connected with the front relay valve 13, the front relay valve 13 and the front synchronous valve 16 are also respectively connected with the front right brake air chamber 15 and the rear right brake air chamber 8, the rear air reservoir 6 is also connected with the air inlet of the rear synchronous valve 7 and the rear relay valve 9, the rear synchronous valve 7 is connected with the rear relay valve 9, and the rear synchronous valve 7 is also respectively connected with the front left brake air chamber 14 and the rear left brake air chamber 10.
In the parking brake system, the combination dryer 2 is disposed in a line between the air source and the four-circuit protection valve 4, and the regenerative air reservoir 3 is disposed in a line between the combination dryer 2 and the four-circuit protection valve 4. The gas which is packed by the combined dryer 2 and enters the valve body is dry gas and is not doped with moisture, so that the service life of the air valve is prolonged.
The four-circuit protection valve 4 is supplied with gas from the regenerating air receiver 3.
Referring to fig. 1, in a driving brake system, the following components are mainly adopted: the air source, the four-circuit protection valve 4, the front air reservoir 5, the rear air reservoir 6, the foot brake valve 12, the front relay valve 13, the rear relay valve 9, the rear right brake air chamber 8, the rear left brake air chamber 10, the front left brake air chamber 14 and the front right brake air chamber 15.
Specifically, the air source is connected with the four-loop protection valve 4, one output port of the four-loop protection valve 4 is connected with the front air reservoir 5, the other output port of the four-loop protection valve 4 is connected with the rear air reservoir 6, one air inlet of the foot brake valve 12 is connected with the front air reservoir 5, the other air inlet of the foot brake valve 12 is connected with the rear air reservoir 6, one air outlet of the foot brake valve 12 is connected with the front relay valve 13, the other air outlet of the foot brake valve 12 is connected with the rear relay valve 9, one air inlet of the front relay valve 13 is connected with the front air reservoir 5, the front relay valve 13 is also respectively connected with the front right brake air chamber 15 and the rear right brake air chamber 8, one air inlet of the rear relay valve 9 is connected with the rear air reservoir 6, and the rear relay valve 9 is also respectively connected with the front left brake air chamber 14 and the rear left brake air chamber 10.
In the service brake system, the combination dryer 2 and the regenerating air receiver 3 also produce the same effect as in the parking brake system.
From the above, in the service braking, the air from the air source passes through the combined dryer 2, the moisture in the air is absorbed by the combined dryer 2, the air is treated and then flows to the front air storage cylinder 5 and the rear air storage cylinder 6 respectively through the four-loop protection valve 4, wherein the four-loop protection valve 4 ensures the independence of the air paths of the front air storage cylinder 5 and the rear air storage cylinder 6, and when one pipeline has the air leakage and other conditions, the other pipeline can still normally operate.
Referring to fig. 1, when the pedal of the foot brake valve 12 is depressed in a driving state of the vehicle, the air inlet of the foot brake valve 12 is communicated with the air flow of the air outlet, and the control ports of the front relay valve 13 and the rear relay valve 9 are immediately opened, so that the control ports of the front relay valve 13 and the rear relay valve 9 are ventilated, the air outlet of the front relay valve 13 controls the front right brake chamber 15 and the rear right brake chamber 8, the air outlet of the rear relay valve 9 controls the front left brake chamber 14 and the rear left brake chamber 10, at this time, the hand brake valve 11 is in a closed state, the air inlet of the hand brake valve 11 is communicated with the air flow of the air outlet, the air flow of the air outlet of the hand brake valve 11 flows to the control port of the front synchronous valve 16 and the control port of the rear synchronous valve 7, at this time, the air inlet of the rear synchronous valve 7 is communicated with the air flow of the air outlet, the locking ports of the front left brake chamber 14 and the front right brake chamber 15 are long, and the piston rods of the front left brake chamber 14 and the front right brake chamber 15 do not have mechanical locking, so that the driving brake can be realized.
After the pedal of the foot brake valve 12 is released, the air inlet and the air outlet of the foot brake valve 12 are disconnected, the control ports of the front relay valve 13 and the rear relay valve 9 are free from air flow, the air outlet is free from air flow, at the moment, the hand brake valve 11 is in a closed state, the air inlet and the air outlet of the hand brake valve 11 are communicated, at the moment, the air flow of the air outlet of the hand brake valve 11 flows to the control ports of the front synchronous valve 16 and the rear synchronous valve 7, at the moment, the air inlet and the air outlet of the front synchronous valve 16 and the rear synchronous valve 7 are communicated, the locking ports of the front right brake air chamber 15, the rear right brake air chamber 8, the front left brake air chamber 14 and the rear left brake air chamber 10 are long air ports, and the piston rods of the front right brake air chamber 15, the rear right brake air chamber 8, the front left brake air chamber 14 and the rear left brake air chamber 10 are free from mechanical locking, and can retract backwards, and the service brake can be released.
Referring to fig. 1, when the vehicle is in a parking state, the handle of the hand brake valve 11 is pulled up, the air inlet and the air outlet of the hand brake valve 11 are disconnected, at this time, the air inlets of the front synchronization valve 16 and the rear synchronization valve 7 are disconnected from the air outlet, the air inlets of the front right brake air chamber 15 and the front left brake air chamber 14 are disconnected from the air outlet, at this time, the brake air chambers are mechanically locked, the foot brake valve 12 is in a release state, the air inlet and the air outlet of the foot brake valve 12 are disconnected, the air inlets of the front relay valve 13 and the control inlet of the rear relay valve 9 are not connected with the air outlet, at this time, the air inlet and the air outlet of the front relay valve 13 are connected with the air outlet, the air inlet and the air outlet of the rear relay valve 9 are connected, and the air inlets of the front right brake air chamber 15 and the front left brake air chamber 14 are connected with the air flow, so that the piston rods of the front right brake air chamber 15, the rear right brake air chamber 8, the front left brake air chamber 14 and the rear left brake air chamber 10 are mechanically locked, and the piston rods of the piston rods are mechanically locked, and the parking brake is realized.
After the handle of the hand brake valve 11 is released, the air inlet of the hand brake valve 11 is in air flow communication with the air outlet, so that the control ports of the front synchronous valve 16 and the rear synchronous valve 7 are free from air flow, the air inlet of the front synchronous valve 16 is in air flow communication with the air outlet, the air inlet of the rear synchronous valve 7 is in air flow communication with the air outlet, at the moment, the locking ports of the front right brake air chamber 15, the rear right brake air chamber 8, the front left brake air chamber 14 and the rear left brake air chamber 10 are in air flow, the foot brake valve 12 is in a release state, the air inlet of the foot brake valve 12 is disconnected from the air outlet, the control ports of the front relay valve 13 and the rear relay valve 9 are free from air flow, at the moment, the air inlet of the front relay valve 13 is disconnected from the air outlet, the air inlet of the rear relay valve 9 is disconnected from the air outlet, and the braking ports of the front right brake air chamber 15, the front right brake air chamber 14 and the rear left brake air chamber 10 are free from air flow, and parking brake release is realized.
In this embodiment, the off-highway wide vehicle pneumatic brake system further has two pressure regulating valves (not shown in the drawings), wherein one pressure regulating valve is disposed between one output port of the four-circuit protection valve 4 and the front air reservoir 5, the other pressure regulating valve is disposed between the other output port of the four-circuit protection valve 4 and the rear air reservoir 6, and the pressure regulating valve is capable of controlling the air outlet pressure of the four-circuit protection valve 4, and is suitable for both a parking brake system and a service brake system.
The off-highway wide body vehicle pneumatic brake system also has two drain valves (not shown) that are adapted for both the parking brake system and the service brake system.
One of the water drain valves is arranged at the bottom of the front air cylinder 5, the other water drain valve is arranged at the bottom of the rear air cylinder 6, and the water drain valve has the function of regularly draining water for the front air cylinder 5 and the rear air cylinder 6 when the whole car is maintained.
In this embodiment, the off-highway wide body vehicle pneumatic brake system further includes a solenoid valve 18 and an air horn 17.
Wherein the electromagnetic valve 18 is connected with the front air reservoir 5, and the air horn 17 is connected with the electromagnetic valve 18.
In conclusion, the off-highway wide vehicle pneumatic brake system is reasonable in structure and high in practicability, double loops of service braking are realized, and simultaneously, front wheels and rear wheels can be locked simultaneously during parking braking, so that the off-highway wide vehicle pneumatic brake system has high safety performance.
Example 2
The embodiment of the invention also provides an off-highway wide vehicle, which comprises the off-highway wide vehicle pneumatic braking system.
The off-highway wide vehicle has the advantages of the off-highway wide vehicle pneumatic brake system.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. An off-highway wide body vehicle pneumatic brake system is characterized by comprising a parking brake system and a service brake system;
the parking brake system comprises an air source, a four-loop protection valve, a front air storage cylinder, a rear air storage cylinder, a hand brake valve, a front synchronous valve, a rear synchronous valve, a front relay valve, a rear right brake air chamber, a rear left brake air chamber, a front left brake air chamber and a front right brake air chamber;
the service brake system comprises the air source, the four-loop protection valve, the front air reservoir, the rear air reservoir, a foot brake valve, the front relay valve, the rear right brake air chamber, the rear left brake air chamber, the front left brake air chamber and the front right brake air chamber;
the air source is connected with the four-loop protection valve, one output port of the four-loop protection valve is connected with the front air storage cylinder, the other output port of the four-loop protection valve is connected with the rear air storage cylinder, the front relay valve is respectively connected with the front right brake air chamber and the rear right brake air chamber, and the rear relay valve is respectively connected with the front left brake air chamber and the rear left brake air chamber;
in the parking braking system, the front air reservoir is connected with the hand braking valve, one air outlet of the hand braking valve is connected with the front synchronous valve, the other air outlet of the hand braking valve is connected with the rear synchronous valve, the front air reservoir is also connected with an air inlet of the front synchronous valve and the front relay valve, the front synchronous valve is also connected with the front relay valve, the front synchronous valve is also respectively connected with the front right braking air chamber and the rear right braking air chamber, the rear air reservoir is also connected with an air inlet of the rear synchronous valve and the rear relay valve, the rear synchronous valve is also connected with the front left braking air chamber and the rear left braking air chamber respectively;
in the service brake system, one air inlet of the foot brake valve is connected with the front air reservoir, the other air inlet of the foot brake valve is connected with the rear air reservoir, one air outlet of the foot brake valve is connected with the front relay valve, the other air outlet of the foot brake valve is connected with the rear relay valve, one air inlet of the front relay valve is connected with the front air reservoir, and one air inlet of the rear relay valve is connected with the rear air reservoir;
when the service braking is realized, a pedal of the foot brake valve is stepped on, so that an air inlet of the foot brake valve is communicated with an air flow of an air outlet, a control port of the front relay valve and the control port of the rear relay valve are opened, so that the air inlets of the front relay valve and the control port of the rear relay valve are ventilated, an air outlet of the front relay valve controls the front right brake air chamber and the rear right brake air chamber, an air outlet of the rear relay valve controls the front left brake air chamber and the rear left brake air chamber, the hand brake valve is in a release state, an air inlet of the hand brake valve is communicated with the air flow of the air outlet of the hand brake valve flows to the control port of the front synchronous valve and the control port of the rear synchronous valve, an air inlet of the front synchronous valve is communicated with the air flow of the air outlet, a locking port of the front left brake air chamber and the front right brake air chamber is a long air vent, and piston rods of the front left brake air chamber and the front right brake air chamber do not produce mechanical locking, and the service braking can be forwards extended;
when the service braking is released, the pedal of the foot brake valve is released, so that the air inlet and the air outlet of the foot brake valve are disconnected, the control ports of the front relay valve and the rear relay valve are free from air flow, the air outlet is free from air flow, the hand brake valve is in a release state, the locking ports of the front right brake air chamber, the rear right brake air chamber, the front left brake air chamber and the rear left brake air chamber are long air ports, and the piston rods of the front right brake air chamber, the rear right brake air chamber, the front left brake air chamber and the rear left brake air chamber are not mechanically locked and can retract backwards to release the service braking;
when parking braking is achieved, a handle of the hand brake valve is pulled up, so that an air inlet and an air outlet of the hand brake valve are disconnected, control ports of the front synchronous valve and the rear synchronous valve are disconnected, air inlets and the air outlets of the front right brake chamber and the front left brake chamber are not connected, the front right brake chamber, the rear right brake chamber, the front left brake chamber and the rear left brake chamber are mechanically locked, the foot brake valve is in a release state, the air inlets and the air outlets of the foot brake valve are disconnected, control ports of the front relay valve and the rear relay valve are not connected, at the moment, the air inlets and the air outlets of the front relay valve are connected, the air inlets of the front right brake chamber, the rear right brake chamber, the front left brake chamber and the rear left brake chamber are connected, the front left brake chamber and the rear brake chamber are connected, and the front left brake chamber is extended, and a parking piston rod is achieved;
when the parking brake is released, the handle of the hand brake valve is released, so that air flows are arranged at locking openings of the front right brake air chamber, the rear right brake air chamber, the front left brake air chamber and the rear left brake air chamber, the foot brake valve is in a release state, at the moment, an air inlet and an air outlet of the front relay valve are disconnected, an air inlet and an air outlet of the rear relay valve are disconnected, and no air flows exist at the locking openings of the front right brake air chamber, the rear right brake air chamber, the front left brake air chamber and the rear left brake air chamber, so that the parking brake is released.
2. The off-road wide body vehicle pneumatic brake system of claim 1, further comprising a combination dryer;
the combined dryer is connected between the air source and the four-loop protection valve.
3. The off-highway wide body vehicle pneumatic brake system of claim 2, further comprising a regenerating air receiver;
the regenerating air receiver is arranged between the combined dryer and the four-loop protection valve.
4. The off-highway wide body vehicle pneumatic brake system of claim 1 or 2, wherein the air source is a compressor.
5. The off-highway wide body vehicle pneumatic brake system of claim 1 or 2, further comprising a pressure regulating valve;
the number of the pressure regulating valves is two, one pressure regulating valve is arranged between one output port of the four-loop protection valve and the front air cylinder, and the other pressure regulating valve is arranged between the other output port of the four-loop protection valve and the rear air cylinder.
6. The off-highway wide body vehicle pneumatic brake system of claim 1 or 2, further comprising a water drain valve;
the number of the water drain valves is two, one water drain valve is arranged at the bottom of the front air storage cylinder, and the other water drain valve is arranged at the bottom of the rear air storage cylinder.
7. The off-highway wide body vehicle pneumatic brake system of claim 1 or 2, further comprising a solenoid valve and an air horn;
the electromagnetic valve is connected with the front air reservoir, and the air horn is connected with the electromagnetic valve.
8. The off-highway wide body vehicle pneumatic brake system according to claim 4, wherein said compressor is powered by an engine.
9. An off-highway wide body vehicle comprising the off-highway wide body vehicle pneumatic brake system of any one of claims 1-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710897273.4A CN107985284B (en) | 2017-09-28 | 2017-09-28 | Off-highway wide vehicle pneumatic brake system and off-highway wide vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710897273.4A CN107985284B (en) | 2017-09-28 | 2017-09-28 | Off-highway wide vehicle pneumatic brake system and off-highway wide vehicle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107985284A CN107985284A (en) | 2018-05-04 |
| CN107985284B true CN107985284B (en) | 2024-01-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710897273.4A Active CN107985284B (en) | 2017-09-28 | 2017-09-28 | Off-highway wide vehicle pneumatic brake system and off-highway wide vehicle |
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| CN111267817B (en) * | 2020-02-22 | 2024-05-10 | 吉林大学 | Air pressure braking system for service braking failure protection |
| CN113291274B (en) * | 2021-06-30 | 2022-03-01 | 三一汽车起重机械有限公司 | Vehicle brake system and work vehicle |
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| CN107985284A (en) | 2018-05-04 |
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