CN117799589A - Unmanned braking system of vehicle - Google Patents
Unmanned braking system of vehicle Download PDFInfo
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- CN117799589A CN117799589A CN202410004898.3A CN202410004898A CN117799589A CN 117799589 A CN117799589 A CN 117799589A CN 202410004898 A CN202410004898 A CN 202410004898A CN 117799589 A CN117799589 A CN 117799589A
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Abstract
The invention provides a vehicle unmanned braking system, which relates to the technical field of vehicle braking and comprises an air source, a first control module, an electromagnetic valve group and a second control module, wherein the second control module comprises two control units; the air inlets of the first control module and the air inlets of the two control units are both communicated with an air source, the air outlet of the first control module is connected with the air inlet of the electromagnetic valve group, the air outlet of the electromagnetic valve group is used for being respectively connected with the front cavities of the two brakes of the vehicle I bridge, and the air outlet of one control unit is used for being respectively connected with the front cavity of the brake on one side of the vehicle II bridge and the front cavity of the brake on the same side of the vehicle III bridge. The first control module, the electromagnetic valve group and the two control units are controlled to be conducted, the air source is used for charging air into the front cavity of the brake, remote braking under unmanned driving is achieved, and even if serious accidents such as soil and stone collapse occur in a mine cavity, casualties cannot be caused.
Description
Technical Field
The invention relates to the technical field of vehicle braking, in particular to a vehicle unmanned braking system.
Background
Mining wide-body vehicles are used for vehicles in mines or mining environments, and generally have wide bodies and powerful power systems, and can be transported and carried under severe road conditions and working environments. Vehicles of this type have a large load carrying capacity and the ability to adapt to different terrains, as they are used to transport ores, sand and other mining materials.
The existing mining wide-body vehicles are mostly driven by drivers, although the mining wide-body vehicles are generally provided with a protective structure, so that safety of the vehicles and the drivers in the mine is ensured, and the vehicles can efficiently transport materials. However, when serious accidents such as earth and stone collapse occur in mines, the protection effect of the protective structure of the mining wide body vehicle on personnel is limited, and the injury and death of drivers still can be caused. Therefore, how to realize unmanned control of the mining wide body vehicle is a technical problem to be solved.
Disclosure of Invention
The invention aims to solve the problem of realizing unmanned control of a mining wide vehicle.
In order to solve the problems, the invention provides a vehicle unmanned braking system, which comprises an air source, a first control module, an electromagnetic valve group and a second control module, wherein the second control module comprises two control units; the air inlet of the first control module and the air inlets of the two control units are communicated with the air source, the air outlet of the first control module is connected with the air inlet of the electromagnetic valve bank, the air outlet of the electromagnetic valve bank is used for being connected with front cavities of two brakes of the vehicle I bridge respectively, the air outlet of one control unit is used for being connected with the front cavity of the brake on one side of the vehicle II bridge and the front cavity of the brake on the same side of the vehicle III bridge respectively, and the air outlet of the other control unit is used for being connected with the front cavity of the brake on the other side of the vehicle II bridge and the front cavity of the brake on the same side of the vehicle III bridge respectively.
Optionally, the first control module includes second electromagnetic directional valve and second relief pressure valve, the air inlet of second electromagnetic directional valve with the air supply is linked together, the gas outlet of second electromagnetic directional valve with the control end of second relief pressure valve links to each other, the air inlet of second relief pressure valve with the air supply is linked together, the gas outlet of second relief pressure valve with the air inlet of solenoid valve group links to each other.
Optionally, the electromagnetic valve group includes a first electromagnetic valve and a second electromagnetic valve, an air outlet of the second pressure reducing valve is connected with an air inlet of the first electromagnetic valve and an air inlet of the second electromagnetic valve respectively, an air outlet of the first electromagnetic valve is used for being connected with the front cavity of one brake of the vehicle I-bridge, and an air outlet of the second electromagnetic valve is used for being connected with the front cavity of the other brake of the vehicle I-bridge.
Optionally, the control unit includes a first braking electromagnetic directional valve and a braking pressure reducing valve, an air inlet of the first braking electromagnetic directional valve is communicated with the air source, an air outlet of the first braking electromagnetic directional valve is connected with a control end of the braking pressure reducing valve, an air inlet of the braking pressure reducing valve is communicated with the air source, and an air outlet of the braking pressure reducing valve is used for being respectively connected with the front cavity of the brake on one side of the vehicle II bridge and the front cavity of the brake on the same side of the vehicle III bridge.
Optionally, the unmanned braking system of vehicle still includes parking module and relay valve, parking module's air inlet with the air supply is linked together, parking module's gas outlet respectively with two of vehicle I bridge the back chamber of stopper with the control end of relay valve links to each other, the first air inlet of relay valve with the air supply is linked together, the gas outlet of relay valve respectively with two of vehicle II bridge the back chamber of stopper with two of vehicle III bridge the back chamber of stopper links to each other.
Optionally, the parking module includes a first electromagnetic directional valve and a fifth pressure reducing valve, an air inlet of the first electromagnetic directional valve is communicated with the air source, an air outlet of the first electromagnetic directional valve is connected with a control end of the fifth pressure reducing valve, an air inlet of the fifth pressure reducing valve is communicated with the air source, and an air outlet of the fifth pressure reducing valve is respectively connected with rear cavities of two brakes of the vehicle I bridge and a control end of the relay valve.
Optionally, the unmanned braking system of vehicle still includes walking redundant solenoid valve, front axle check valve and third electromagnetic reversing valve, the first air inlet of walking redundant solenoid valve with the air supply is linked together, the gas outlet of walking redundant solenoid valve with the first air inlet of front axle check valve links to each other, the gas outlet of front axle check valve with the air inlet of third electromagnetic reversing valve links to each other, the gas outlet of third electromagnetic reversing valve with the control end of second relief pressure valve links to each other.
Optionally, the unmanned braking system of the vehicle further comprises a rear axle one-way valve, the control unit further comprises a second braking electromagnetic reversing valve, a first air inlet of the rear axle one-way valve is connected with an air outlet of the walking redundant electromagnetic valve, the air outlets of the rear axle one-way valve are respectively connected with the air inlets of the second braking electromagnetic reversing valves in the two control units, and the air outlet of the second braking electromagnetic reversing valve is connected with the control end of the braking pressure reducing valve in the control unit.
Optionally, the unmanned braking system of vehicle still includes the parking solenoid valve, the air inlet of parking solenoid valve respectively with the gas outlet of first solenoid valve with the gas outlet of fifth relief pressure valve is linked together, the shutoff of the first gas outlet of parking solenoid valve, install the check valve on the second gas outlet of parking solenoid valve, install another check valve on the second air inlet of relay valve.
Optionally, the vehicle unmanned braking system further comprises wheel speed sensors for detecting the wheel speeds of the two wheels of the vehicle I-bridge and the wheel speeds of the two wheels of the vehicle III-bridge, respectively.
Compared with the prior art, the invention has the following beneficial effects:
according to the unmanned vehicle braking system, the running state and the running speed of the vehicle are monitored in real time, when the vehicle is required to be braked, one or more of the first control module and the two control units are controlled to be conducted, meanwhile, the electromagnetic valve group is controlled to be conducted, and the air source charges air into the front cavities of the two brakes of the vehicle I bridge through the electromagnetic valve group, so that the vehicle of the I bridge is braked in a running mode; the air source respectively fills gas to the front cavities of the two brakes of the vehicle II bridge and the front cavities of the two brakes of the vehicle III bridge through the two control units, so that the wheels of the vehicle II bridge and the vehicle III bridge are braked in a running mode, remote control braking under unmanned driving is realized, the vehicle can be controlled to run in a mine tunnel under the unmanned driving condition, and even if serious accidents such as earth and stone collapse occur in the mine tunnel, personal casualties cannot be caused.
Drawings
FIG. 1 shows a schematic structural diagram of a vehicle unmanned braking system in an embodiment of the invention;
fig. 2 shows a schematic structural view of a brake according to an embodiment of the present invention.
Reference numerals illustrate:
1. a gas source; 2. a brake block; 3. a first control module; 4. a first electromagnetic valve; 5. a second electromagnetic valve; 6. the right wheel speed sensor of the I bridge; 7. the left wheel speed sensor of the I bridge; 8. a parking module; 9. the left brake of the I bridge; 10. the right brake of the bridge I; 11. II bridge left brake; 12. a right bridge brake; 13. III, a bridge left wheel speed sensor; 14. III, a right wheel speed sensor of the bridge; 15. III bridge left brake; 16. III bridge right brake; 17. a front axle check valve; 18. a rear axle one-way valve; 19. a walking redundant electromagnetic valve; 20. a parking electromagnetic valve; 21. a first pressure reducing valve; 22. a second pressure reducing valve; 23. a third pressure reducing valve; 24. a fourth pressure reducing valve; 25. a relay valve; 26. a first electromagnetic directional valve; 27. a fifth pressure reducing valve; 28. a second electromagnetic directional valve; 29. a third electromagnetic directional valve; 30. a fourth electromagnetic directional valve; 31. a fifth electromagnetic directional valve; 32. a sixth electromagnetic directional valve; 33. a seventh electromagnetic directional valve; 34. a first control unit; 35. a second control unit; 36. a front cavity; 37. a rear cavity; 38. a push rod of the air chamber; 39. and (3) a spring.
Detailed Description
In order that the above objects, features and advantages of the invention will be readily understood, a more particular description of the invention will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings.
It is noted that the terms "first," "second," and the like in the description and claims of the invention and in the foregoing figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented in sequences other than those illustrated or otherwise described herein.
In the description of the present specification, the descriptions of the terms "embodiment," "one embodiment," and the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or embodiment is included in at least one embodiment or implementation of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same examples or implementations. Furthermore, the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or implementations.
Fig. 1 shows a schematic structural diagram of a vehicle unmanned braking system according to an embodiment of the present invention, including: the system comprises an air source 1, a first control module 3, an electromagnetic valve group and a second control module, wherein the second control module comprises two control units; the air inlet of the first control module 3 and the air inlets of the two control units are communicated with the air source 1, the air outlet of the first control module 3 is connected with the air inlet of the electromagnetic valve group, the air outlet of the electromagnetic valve group is connected with the front cavities of the two brakes of the vehicle I bridge respectively, the air outlet of one control unit is connected with the front cavity of the brake on one side of the vehicle II bridge and the front cavity of the brake on the same side of the vehicle III bridge respectively, and the air outlet of the other control unit is connected with the front cavity of the brake on the other side of the vehicle II bridge and the front cavity of the brake on the same side of the vehicle III bridge respectively.
Specifically, the first control module and the two control units specifically adopt control valve assemblies, which can be two-position two-way electromagnetic directional valves, and whether the air source 1 transmits brake air to the brake is controlled by controlling the on-off of the two-position two-way electromagnetic directional valves. The first control module and the two control units can also be a three-position three-way electromagnetic directional valve, so that the three-position three-way electromagnetic directional valve can be provided with an air inlet position, a pressure maintaining position and an air exhaust position, and can realize multiple functions through one electromagnetic directional valve. The structure of the brake is shown in fig. 2, the brake comprises a front cavity 36, a rear cavity 37, an air chamber push rod 38 and a spring 39, a diaphragm is arranged between the front cavity 36 and the rear cavity 37, the two cavities are not communicated, when no air exists in the front cavity 36 and the rear cavity 37, the spring 39 pushes a piston to move leftwards, the piston drives a rod piece on the piston to move together, the rod piece on the piston ejects the air chamber push rod 38, and the air chamber push rod 38 is in contact with a wheel or a wheel brake pad to brake the wheel. When the rear chamber 37 is inflated, the piston is pressed rightward, the spring 39 is compressed, the air chamber push rod 38 is no longer pushed out, and the wheels are released; when the front chamber 36 is inflated, the air chamber pushrod 38 is pressurized so that the air chamber pushrod 38 extends out, again braking the wheel. When the vehicle is running, it is necessary to charge the rear chamber 37 with gas, and when braking is required, the front chamber 36 with gas. As shown in fig. 1, the two brakes of the I bridge are respectively an I bridge left brake 9 and an I bridge right brake 10, the two brakes of the II bridge are respectively an II bridge left brake 11 and an II bridge right brake 12, and the two brakes of the III bridge are respectively a III bridge left brake 15 and a III bridge right brake 16.
In the embodiment, through monitoring the running state and the running speed of the vehicle in real time, when the vehicle is required to brake, one or more of the first control module 3 and the two control units are controlled to be conducted, meanwhile, the electromagnetic valve group is controlled to be conducted, and the air source 1 charges air into the front cavities of the two brakes of the vehicle I bridge through the electromagnetic valve group, so that the vehicle of the I bridge is braked; the air source 1 respectively fills air into the front cavities of the two brakes of the vehicle II bridge and the front cavities of the two brakes of the vehicle III bridge through the two control units, so that the wheels of the vehicle II bridge and the vehicle III bridge are braked in a running mode, remote control braking under unmanned driving is realized, the vehicle can be controlled to run in a mine tunnel under the unmanned driving condition, and even if serious accidents such as earth and stone collapse occur in the mine tunnel, personal casualties cannot be caused.
In one embodiment of the present invention, the first control module 3 includes a second electromagnetic directional valve 28 and a second pressure reducing valve 22, where an air inlet of the second electromagnetic directional valve 28 is connected to the air source 1, an air outlet of the second electromagnetic directional valve 28 is connected to a control end of the second pressure reducing valve 22, an air inlet of the second pressure reducing valve 22 is connected to the air source 1, and an air outlet of the second pressure reducing valve 22 is connected to an air inlet of the electromagnetic valve set. The control end of the second pressure reducing valve 22 is connected to a check valve through a solenoid valve.
Specifically, the second electromagnetic directional valve 28 is a two-position two-way electromagnetic directional valve, or may be another directional valve such as a three-position three-way electromagnetic directional valve, as long as it can block or guide the gas in the gas source 1 to the control end of the second pressure reducing valve 22.
In this embodiment, when the vehicle needs to be braked, the second electromagnetic directional valve 28 is controlled to switch, the second electromagnetic directional valve 28 transmits gas to the control end of the second pressure reducing valve 22, so that the second pressure reducing valve 22 is conducted, the gas source 1 is transmitted to the electromagnetic valve set through the second pressure reducing valve 22, the electromagnetic valve set is controlled to switch on in a switching manner, so that the gas is transmitted to the front cavities of the two brakes of the I bridge through the electromagnetic valve set, and therefore the two wheels of the I bridge realize unmanned driving braking, or speed adjustment of the vehicle is realized.
In one embodiment of the present invention, the solenoid valve group includes a first solenoid valve 4 and a second solenoid valve 5, and the air outlet of the second pressure reducing valve 22 is connected to the air inlet of the first solenoid valve 4 and the air inlet of the second solenoid valve 5, respectively, and the air outlet of the first solenoid valve 4 is used to be connected to the front chamber of one of the brakes of the vehicle I-bridge, and the air outlet of the second solenoid valve 5 is used to be connected to the front chamber of the other of the brakes of the vehicle I-bridge. The air outlet of the first electromagnetic valve 4 and the air outlet of the second electromagnetic valve 5 are respectively connected with a one-way valve through another electromagnetic valve.
Specifically, the first electromagnetic valve 4 and the second electromagnetic valve 5 may be provided as two-position two-way electromagnetic directional valves, and may be provided as a shut-off valve or other electromagnetic controlled on-off valve such as a gate valve.
In this embodiment, when the gas in the gas source 1 passes through the second pressure reducing valve 22 and then is respectively delivered to the gas inlet of the first electromagnetic valve 4 and the gas inlet of the second electromagnetic valve 5 in the electromagnetic valve group, the first electromagnetic valve 4 and the second electromagnetic valve 5 are controlled to be conducted in a reversing manner, and the gas is respectively filled into the front cavities of the two brakes of the I-bridge through the two electromagnetic valves, so that pneumatic service braking is realized. Because the I bridge is the front axle, two front vehicle wheels brake simultaneously, can realize the quick braking to the wheel, control first solenoid valve 4 or second solenoid valve 5 are switched on alone respectively in addition, can also brake respectively to two wheels in the I bridge, through a wheel rotation, the form of wheel brake lets the vehicle carry out certain turning to, can also reply multiple vehicle operating mode, lets the topography adaptability reinforcing of vehicle.
In one embodiment of the present invention, the control unit includes a first brake electromagnetic directional valve and a brake pressure reducing valve, an air inlet of the first brake electromagnetic directional valve is connected to the air source 1, an air outlet of the first brake electromagnetic directional valve is connected to a control end of the brake pressure reducing valve, an air inlet of the brake pressure reducing valve is connected to the air source 1, and an air outlet of the brake pressure reducing valve is used for being connected to the front cavity of the brake on one side of the vehicle II bridge and the front cavity of the brake on the same side of the vehicle III bridge, respectively. The control end of the brake pressure reducing valve is connected with a one-way valve through an electromagnetic valve.
Specifically, as shown in fig. 1, the two control units are a first control unit 34 and a second control unit 35, respectively, the first control unit 34 includes a first brake electromagnetic directional valve and a brake pressure reducing valve that are a fourth electromagnetic directional valve 30 and a fourth pressure reducing valve 24, respectively, and the second control unit 35 includes a first brake electromagnetic directional valve and a brake pressure reducing valve that are a seventh electromagnetic directional valve 33 and a third pressure reducing valve 23, respectively.
In this embodiment, the fourth electromagnetic directional valve 30 and the seventh electromagnetic directional valve 33 are controlled to be turned on in a reversing manner, the gas of the gas source 1 is respectively delivered to the control ends of the fourth pressure reducing valve 24 and the third pressure reducing valve 23, so that the third pressure reducing valve 23 and the fourth pressure reducing valve 24 are turned on, the gas of the gas source 1 is respectively filled into the front cavities of the right II-bridge brake 12 and the right III-bridge brake 16 through the third pressure reducing valve 23 which is turned on, so that the wheels where the brakes are located are used for braking, and the gas of the gas source 1 is respectively filled into the left II-bridge brake 11 and the left III-bridge brake 15 through the fourth pressure reducing valve 24 which is turned on, so that the wheels where the brakes are located are braked. The II bridge and the III bridge are rear axles of vehicles, wheels (for example, left two wheels or right two wheels) on the same side of the rear axle can be braked simultaneously, and wheels on two sides of the rear axle can be braked separately, so that the same effect as that of the front axle (I bridge) is achieved. In addition, the control ends of the brake reducing valve are connected with a one-way valve through a solenoid valve, that is, the control ends of the fourth reducing valve 24 and the third reducing valve 23 are respectively connected with a deflation one-way valve through a deflation solenoid valve, as shown in fig. 1, so that the maintenance is convenient, when the maintenance is needed or the braking is forcedly released, the deflation solenoid valve is conducted, then the gas at the control ends of the fourth reducing valve 24 and the third reducing valve 23 is discharged through the deflation one-way valve, so that the control ends of the fourth reducing valve 24 and the third reducing valve 23 are turned off, the front cavity of the brake in the rear axle is not inflated any more, and the gas in the front cavity of the rear axle brake is also discharged through the deflation one-way valve, and the brake is not braked any more.
In one embodiment of the present invention, the unmanned vehicle braking system further includes a parking module 8 and a relay valve 25, wherein an air inlet of the parking module 8 is connected to the air source 1, an air outlet of the parking module 8 is connected to rear cavities of two brakes of the vehicle I-bridge and a control end of the relay valve 25, a first air inlet of the relay valve 25 is connected to the air source 1, and an air outlet of the relay valve 25 is connected to rear cavities of two brakes of the vehicle II-bridge and rear cavities of two brakes of the vehicle III-bridge, respectively.
Specifically, the relay valve 25 is a three-position three-way proportional valve, or is directly configured as a three-position three-way electromagnetic valve, and the control end of the relay valve 25 is pneumatic. The parking control module 8 can be a two-dimensional two-way battery reversing valve or other electromagnetic switching valves, so long as switching on and off of the gas circuit can be realized.
In this embodiment, the parking module 8 is controlled to be turned on, and the gas of the gas source 1 is introduced into the rear cavities of the two brakes of the I bridge through the turned-on parking module 8, and is introduced into the control end of the relay valve 25, so that the relay valve 25 is reversed, and the gas of the gas source 1 is introduced into the rear cavities of the four brakes of the II bridge and the III bridge through the relay valve 25. When the vehicle does not work, no air is introduced into the front cavity and the rear cavity of the brake in the vehicle, and the wheels are braked under the action of the springs. In the starting stage, the parking module 8 can be controlled to be conducted, so that gas is introduced into rear cavities of four brakes in the rear axle, springs are compressed, air chamber push rods of the brakes are retracted, parking braking is released, wheels can rotate, remote control of a vehicle is achieved, and a driver does not need to operate in a cab of the vehicle.
In one embodiment of the present invention, the parking module 8 includes a first electromagnetic directional valve 26 and a fifth pressure reducing valve 27, where an air inlet of the first electromagnetic directional valve 26 is connected to the air source 1, an air outlet of the first electromagnetic directional valve 26 is connected to a control end of the fifth pressure reducing valve 27, an air inlet of the fifth pressure reducing valve 27 is connected to the air source 1, and air outlets of the fifth pressure reducing valve 27 are respectively connected to rear chambers of two brakes of the vehicle I-axle and control ends of the relay valve 25. The control end of the fifth pressure reducing valve 27 is connected to a check valve through a solenoid valve.
Specifically, the first electromagnetic directional valve 26 may be a two-position two-way electromagnetic directional valve, a three-position three-way electromagnetic directional valve or other electromagnetic switching valve.
In this embodiment, the first electromagnetic directional valve 26 is controlled to be turned on in a reversing manner, so that the gas of the gas source 1 reaches the control end of the fifth pressure reducing valve 27, so that the fifth pressure reducing valve 27 is turned on, the gas of the gas source 1 is output from the parking module 8 through the gas outlet of the fifth pressure reducing valve 27, and the parking state can be released only by remotely controlling the first electromagnetic directional valve 26 to be turned on through the cooperative work of the first electromagnetic directional valve 26 and the fifth pressure reducing valve 27, so that the wheels can rotate freely, and the operation and control are simple and quick. In addition, the control end of the fifth pressure reducing valve 27 is connected with a one-way valve through an electromagnetic valve, so that the gas at the control end of the fifth pressure reducing valve 27 is conveniently and rapidly discharged, the fifth pressure reducing valve 27 is turned off, the gas of the gas source 1 is rapidly cut off and continuously input into the rear cavity of the brake, and the maintenance is convenient.
In one embodiment of the present invention, the unmanned vehicle braking system further includes a traveling redundancy electromagnetic valve 19, a front axle check valve 17, and a third electromagnetic directional valve 29, wherein a first air inlet of the traveling redundancy electromagnetic valve 19 is communicated with the air source 1, an air outlet of the traveling redundancy electromagnetic valve 19 is connected with a first air inlet of the front axle check valve 17, an air outlet of the front axle check valve 17 is connected with an air inlet of the third electromagnetic directional valve 29, and an air outlet of the third electromagnetic directional valve 29 is connected with a control end of the second pressure reducing valve 22. A check valve is arranged on the second air inlet of the walking redundant electromagnetic valve 19.
Specifically, the travel redundancy solenoid valve 19 may be provided as a two-position two-way solenoid directional valve, the front axle check valve 17 may be provided as a shuttle valve, and the third solenoid directional valve 29 may be provided as a two-position two-way solenoid directional valve. In addition, the traveling redundant solenoid valve 19 and the third electromagnetic directional valve 29 may be three-position three-way electromagnetic directional valves or other electromagnetic switching valves, and the front axle check valve 17 may be replaced by a three-position three-way electromagnetic directional valve, where the third electromagnetic directional valve 29 is normally turned on.
In this embodiment, when the second electromagnetic directional valve 28 is damaged or cannot work, the traveling redundant electromagnetic valve 19 can be controlled to conduct in a reversing manner, so that the gas of the gas source 1 reaches the third electromagnetic directional valve 29 by controlling the traveling redundant electromagnetic valve 19 and the front axle one-way valve 17, and then is conveyed to the control end of the second pressure reducing valve 22, so that the second pressure reducing valve 22 is conducted, and further the gas of the gas source 1 is conveyed to the electromagnetic valve group. The brake system is provided with one more conveying route, the two brakes in the I bridge are supplied with service brake gas, when the other conveying route fails, the route can be started to provide brake gas for the vehicle, the vehicle is supported to continue working, work interruption is avoided, work efficiency of the vehicle is improved, and failure is avoided to delay important transportation work. When the gas transmission passage in which the second electromagnetic directional valve 28 is located is used, the third electromagnetic directional valve 29 needs to be controlled to be turned off in a reverse direction.
In one embodiment of the present invention, the unmanned vehicle braking system further includes a rear axle check valve 18, the control unit further includes a second brake electromagnetic directional valve, a first air inlet of the rear axle check valve 18 is connected to an air outlet of the traveling redundancy electromagnetic valve 19, the air outlets of the rear axle check valve 18 are respectively connected to air inlets of second brake electromagnetic directional valves in the two control units, and an air outlet of the second brake electromagnetic directional valve is connected to a control end of the brake pressure reducing valve in the control unit.
Specifically, the rear axle check valve 18 may be provided as a shuttle valve or may be replaced with a three-position three-way electromagnetic directional valve. The second braking electromagnetic directional valve is a fifth electromagnetic directional valve 31 in the first control unit 34, and the second braking electromagnetic directional valve is a sixth electromagnetic directional valve 32 in the second control unit 35, wherein the fifth electromagnetic directional valve 31 and the sixth electromagnetic directional valve 32 can be two-position two-way electromagnetic directional valves, three-position three-way electromagnetic directional valves or other electromagnetic switching valves.
In this embodiment, when the first braking electromagnetic directional valve fails, the traveling redundancy electromagnetic valve 19 may be controlled to conduct in a reversing manner, the second braking electromagnetic directional valve is conducted in a normal state, the gas of the gas source 1 reaches the fifth electromagnetic directional valve 31 and the sixth electromagnetic directional valve 32 through the traveling redundancy electromagnetic valve 19 and the rear axle check valve 18, and then the control ends of the fourth pressure reducing valve 24 and the third pressure reducing valve 23 are led in, so that the fourth pressure reducing valve 24 and the third pressure reducing valve 23 are conducted, the gas of the gas source 1 reaches the front cavities of the brakes in the II bridge and the III bridge through the fourth pressure reducing valve 24 and the third pressure reducing valve 23, and service braking is performed on the wheels, thereby improving the tolerance degree of the vehicle to the failure and improving the working efficiency. When the gas transmission passage where the first braking electromagnetic directional valve is used, the second braking electromagnetic directional valve needs to be controlled to be turned off in a reversing way.
In one embodiment of the present invention, the unmanned vehicle braking system further includes a parking electromagnetic valve 20, an air inlet of the parking electromagnetic valve 20 is respectively communicated with an air outlet of the first electromagnetic directional valve 26 and an air outlet of the fifth pressure reducing valve 27, the first air outlet of the parking electromagnetic valve 20 is blocked, a one-way valve is installed on the second air outlet of the parking electromagnetic valve 20, and another one-way valve is installed on the second air inlet of the relay valve 25.
Specifically, the parking solenoid valve 20 may be a two-position two-way electromagnetic directional valve, a three-position three-way electromagnetic directional valve, a one-way valve, or other electromagnetic on-off valves.
In this embodiment, the parking solenoid valve 20 is normally in the blocking non-conductive state. And in the running process of the vehicle, air is continuously introduced into the rear cavity of the brake, so that the spring is compressed, the air chamber push rod is retracted, and the wheels release the parking brake. When the vehicle is required to park and brake, the vehicle is stopped and closed, the air source 1 does not supply air any more, the valve is powered off, the parking electromagnetic valve 20 is controlled to change direction, the air inlet of the parking electromagnetic valve 20 is communicated with the second air outlet, the relay valve 25 returns to the normal state, and the air in the rear cavity of the I-bridge brake reaches the air inlet of the parking electromagnetic valve 20 through the air outlet of the fifth pressure reducing valve 27 and is discharged to the outside through the second air outlet of the parking electromagnetic valve 20; the air in the rear cavities of the four brakes of the rear axle is discharged outwards through the second air inlet of the relay valve 25 under the action of the springs, so that the springs are restored to a natural state, the piston drives the rod piece to enable the air chamber push rod to extend out to be in contact with the wheels, and the vehicle realizes the braking of the main vehicle.
In one embodiment of the invention, the vehicle unmanned braking system further comprises wheel speed sensors for detecting the wheel speeds of the two wheels of the vehicle I-bridge and the two wheels of the vehicle III-bridge, respectively. The unmanned braking system of the vehicle further comprises a controller, wherein the controller is used for sending control signals to corresponding valves in the system according to wheel speeds of wheels, so that reversing of the valves is achieved, and the vehicle has the functions of releasing parking braking, service braking and parking braking under an unmanned condition.
In this embodiment, as shown in fig. 1, an I-bridge right wheel speed sensor 6 and an I-bridge left wheel speed sensor 7 are respectively disposed near two wheels of an I-bridge, and a III-bridge left wheel speed sensor 13 and a III-bridge right wheel speed sensor 14 are respectively disposed near two wheels of a III-bridge, each wheel speed sensor detecting a wheel speed of a wheel on an I-bridge and a III-bridge of a vehicle and uploading the wheel speeds to a controller, and the controller controls on-off of a valve in a system according to the wheel speeds of the wheels, so that the vehicle has functions of releasing parking brake, service brake and parking brake under an unmanned condition. In addition, whether the second electromagnetic directional valve 28 and the first braking electromagnetic directional valve fail or not can be judged by detecting whether the speed of the wheels is reduced or not at the time of service braking, and when a directional control signal is sent to the second electromagnetic directional valve 28 and the first braking electromagnetic directional valve, service braking is carried out, but the speed of the wheels is not reduced as expected, which indicates that the second electromagnetic directional valve 28 and the first braking electromagnetic directional valve fail.
In addition to the above, the unmanned vehicle brake system further comprises a brake block 2, the brake block 2 comprises two first pressure reducing valves 21, air inlets of the two first pressure reducing valves 21 are connected with the air source 1, an air outlet of one first pressure reducing valve 21 is connected with a second air inlet of the front axle one-way valve 17, an air outlet of the other first pressure reducing valve 21 is connected with a second air inlet of the rear axle one-way valve 18, control ends of the two first pressure reducing valves 21 are connected with a brake pedal of the vehicle, when a driver steps on the brake pedal, the first pressure reducing valves 21 are conducted, air source 1 air is respectively conveyed to the front axle one-way valve 17 and the rear axle one-way valve 18 through the first pressure reducing valves 21, air output by the front axle one-way valve 17 is conducted through a third electromagnetic directional valve 29, and the air of the air source 1 reaches front cavities of the two brakes of the I axle through the second pressure reducing valve 22, so that wheel brake is realized; the gas output by the rear axle one-way valve 18 is introduced into the control ends of the fourth pressure reducing valve 24 and the third pressure reducing valve 23 through two second braking electromagnetic directional valves (a fifth electromagnetic directional valve 31 and a sixth electromagnetic directional valve 32), so that the fourth pressure reducing valve 24 and the third pressure reducing valve 23 are conducted, and the gas source 1 reaches the front cavities of the brakes in the II bridge and the III bridge through the fourth pressure reducing valve 24 and the third pressure reducing valve 23 to perform service braking on the wheels. The unmanned braking system can also perform manned braking, so that the vehicle has multiple driving modes, and the vehicle can meet different driving requirements and driving habits.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the invention, and the scope of the invention should be assessed accordingly to that of the appended claims.
Claims (10)
1. An unmanned vehicle braking system, comprising: the system comprises an air source (1), a first control module (3), an electromagnetic valve group and a second control module, wherein the second control module comprises two control units; the air inlet of the first control module (3) and the air inlets of the two control units are communicated with the air source (1), the air outlet of the first control module (3) is connected with the air inlet of the electromagnetic valve group, the air outlet of the electromagnetic valve group is connected with front cavities of two brakes of the vehicle I bridge respectively, the air outlet of one control unit is connected with the front cavity of the brake on one side of the vehicle II bridge and the front cavity of the brake on the same side of the vehicle III bridge respectively, and the air outlet of the other control unit is connected with the front cavity of the brake on the other side of the vehicle II bridge and the front cavity of the brake on the same side of the vehicle III bridge respectively.
2. The unmanned vehicle brake system according to claim 1, wherein the first control module (3) comprises a second electromagnetic directional valve (28) and a second pressure reducing valve (22), the air inlet of the second electromagnetic directional valve (28) is communicated with the air source (1), the air outlet of the second electromagnetic directional valve (28) is connected with the control end of the second pressure reducing valve (22), the air inlet of the second pressure reducing valve (22) is communicated with the air source (1), and the air outlet of the second pressure reducing valve (22) is connected with the air inlet of the electromagnetic valve group.
3. The unmanned vehicle brake system according to claim 2, wherein the solenoid valve group comprises a first solenoid valve (4) and a second solenoid valve (5), the air outlet of the second pressure reducing valve (22) being connected to the air inlet of the first solenoid valve (4) and the air inlet of the second solenoid valve (5), respectively, the air outlet of the first solenoid valve (4) being adapted to be connected to the front chamber of one of the brakes of the vehicle I-bridge, and the air outlet of the second solenoid valve (5) being adapted to be connected to the front chamber of the other of the brakes of the vehicle I-bridge.
4. The unmanned vehicle brake system according to claim 2, wherein the control unit comprises a first brake solenoid directional valve and a brake pressure reducing valve, an air inlet of the first brake solenoid directional valve being in communication with the air source (1), an air outlet of the first brake solenoid directional valve being in communication with a control end of the brake pressure reducing valve, an air inlet of the brake pressure reducing valve being in communication with the air source (1), an air outlet of the brake pressure reducing valve being for being in communication with the front chamber of the brake on the side of the vehicle II bridge and the front chamber of the brake on the same side of the vehicle III bridge, respectively.
5. The unmanned vehicle braking system according to claim 1, further comprising a parking module (8) and a relay valve (25), wherein the air inlet of the parking module (8) is connected to the air source (1), the air outlets of the parking module (8) are respectively connected to the rear chambers of the two brakes of the vehicle I-bridge and the control end of the relay valve (25), the first air inlet of the relay valve (25) is connected to the air source (1), and the air outlets of the relay valve (25) are respectively connected to the rear chambers of the two brakes of the vehicle II-bridge and the rear chambers of the two brakes of the vehicle III-bridge.
6. The unmanned vehicle brake system according to claim 5, wherein the parking module (8) comprises a first electromagnetic directional valve (26) and a fifth pressure reducing valve (27), the air inlet of the first electromagnetic directional valve (26) is communicated with the air source (1), the air outlet of the first electromagnetic directional valve (26) is connected with the control end of the fifth pressure reducing valve (27), the air inlet of the fifth pressure reducing valve (27) is communicated with the air source (1), and the air outlets of the fifth pressure reducing valve (27) are respectively connected with the rear cavities of the two brakes of the vehicle I-bridge and the control end of the relay valve (25).
7. The unmanned vehicle brake system according to claim 4, further comprising a traveling redundancy solenoid valve (19), a front axle check valve (17) and a third electromagnetic directional valve (29), wherein a first air inlet of the traveling redundancy solenoid valve (19) is communicated with the air source (1), an air outlet of the traveling redundancy solenoid valve (19) is connected with the first air inlet of the front axle check valve (17), an air outlet of the front axle check valve (17) is connected with an air inlet of the third electromagnetic directional valve (29), and an air outlet of the third electromagnetic directional valve (29) is connected with a control end of the second pressure reducing valve (22).
8. The unmanned vehicle brake system according to claim 7, further comprising a rear axle check valve (18), wherein the control unit further comprises a second brake electromagnetic directional valve, a first air inlet of the rear axle check valve (18) is connected to an air outlet of the travel redundancy solenoid valve (19), an air outlet of the rear axle check valve (18) is connected to air inlets of second brake electromagnetic directional valves of the two control units, respectively, and an air outlet of the second brake electromagnetic directional valve is connected to a control end of the brake pressure reducing valve of the control unit.
9. The unmanned vehicle brake system according to claim 6, further comprising a parking solenoid valve (20), wherein the air inlet of the parking solenoid valve (20) is respectively communicated with the air outlet of the first electromagnetic directional valve (26) and the air outlet of the fifth pressure reducing valve (27), the first air outlet of the parking solenoid valve (20) is blocked, a one-way valve is mounted on the second air outlet of the parking solenoid valve (20), and another one-way valve is mounted on the second air inlet of the relay valve (25).
10. The unmanned vehicle braking system of any of claims 1-9, further comprising wheel speed sensors for detecting the wheel speeds of the two wheels of the vehicle I-bridge and the two wheels of the vehicle III-bridge, respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410004898.3A CN117799589A (en) | 2024-01-02 | 2024-01-02 | Unmanned braking system of vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410004898.3A CN117799589A (en) | 2024-01-02 | 2024-01-02 | Unmanned braking system of vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117799589A true CN117799589A (en) | 2024-04-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410004898.3A Pending CN117799589A (en) | 2024-01-02 | 2024-01-02 | Unmanned braking system of vehicle |
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| Country | Link |
|---|---|
| CN (1) | CN117799589A (en) |
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2024
- 2024-01-02 CN CN202410004898.3A patent/CN117799589A/en active Pending
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