Dumper intelligent braking system and mining dumper

Abstract

The invention provides a dumper intelligent braking system which comprises a braking pedal, a braking main valve, an intelligent braking controller, a main braking unit and an auxiliary braking unit, the braking main valve is connected with the braking pedal and the main braking unit, and the braking main valve is used for controlling braking of the main braking unit when the braking pedal is treaded; the intelligent braking controller is connected with the braking main valve and the auxiliary braking unit. The brake master valve is further used for generating an auxiliary brake signal when the brake pedal is treaded and transmitting the auxiliary brake signal to the intelligent brake controller; the intelligent braking controller is used for sending a braking control signal to the auxiliary braking unit according to the auxiliary braking signal so that the auxiliary braking unit can conduct auxiliary braking. The intelligent braking system of the dumper can improve the use frequency of the auxiliary braking unit, reduce the loss of the main braking unit, prolong the service life of the main braking unit and improve the driving safety. The invention further provides a mining dump truck.

Description

Technical Field

[0001] The invention relates to the technical field of dump truck braking, and in particular to an intelligent braking system for a dump truck and a mining dump truck. Background Art

[0002] Mining dump trucks work on complex roads and in harsh working environments, so they have high safety requirements, and the performance of the braking system is an important indicator of driving safety for mining dump trucks. In order to enable mining dump trucks to cope with different braking scenarios, mining dump trucks are generally equipped with a main braking system and an auxiliary braking system. The main braking system is generally pneumatic braking, and the auxiliary braking system includes hydraulic retarding braking and engine braking (including engine cylinder braking and engine exhaust braking).

[0003] Among them, pneumatic braking is generally achieved by the driver stepping on the brake pedal and using the brake pedal to push the valve core of the foot valve to move. Hydraulic retarding braking is generally achieved by the driver manually operating the hydraulic retarding handle. When braking, the driver moves the hydraulic retarding handle to the required brake gear to obtain the required braking force. Engine cylinder braking is generally achieved by the driver manually operating the engine cylinder brake switch. When braking, the driver needs to leave the steering wheel with his right hand, confirm the switch position with his eyes, and press the engine cylinder brake switch on the instrument to brake.

[0004] Since the main brake system and the auxiliary brake system need to be operated independently, and the operations of gears, switches and foot brakes are complicated and cumbersome, the driver tends to use the main brake frequently and for a long time during driving, while the utilization rate of the auxiliary brake is not high, which accelerates the wear of the friction plate and tire, and the braking efficiency of the friction plate decreases rapidly. In severe cases, it leads to failure of the main brake, which not only affects driving safety, but also requires frequent replacement of friction plates and tires, increasing costs. Summary of the invention

[0005] The purpose of the present invention is to provide an intelligent braking system for a dump truck and a mining dump truck, aiming to solve or at least partially solve the deficiencies of the above-mentioned background technology. The intelligent braking system for a dump truck can increase the frequency of use of the auxiliary braking unit, reduce the wear and tear of the main braking unit, and increase the life of the main braking unit and driving safety.

[0006] The present invention provides an intelligent braking system for a dump truck, comprising a brake pedal, a brake master valve, an intelligent brake controller, a main brake unit and an auxiliary brake unit, wherein the brake master valve is connected to the brake pedal and the main brake unit respectively, and the brake master valve is used to control the braking of the main brake unit when the brake pedal is stepped on;

[0007] The intelligent brake controller is connected to the main brake valve and the auxiliary brake unit respectively; the main brake valve is also used to generate an auxiliary brake signal when the brake pedal is stepped on, and transmit the auxiliary brake signal to the intelligent brake controller; the intelligent brake controller is used to send a brake control signal to the auxiliary brake unit according to the auxiliary brake signal, so that the auxiliary brake unit performs auxiliary braking.

[0008] Furthermore, the auxiliary braking unit includes a hydraulic retarding braking unit and an engine braking unit, and the intelligent braking controller is respectively connected to the hydraulic retarding braking unit and the engine braking unit, and the intelligent braking controller is used to send braking control signals to the hydraulic retarding braking unit and the engine braking unit respectively according to the auxiliary braking signal.

[0009] Furthermore, the auxiliary braking signal includes a brake switch signal and a pedal displacement simulation signal; the intelligent brake controller is used to send a brake control signal to the engine brake unit according to the brake switch signal, and the intelligent brake controller is used to send a brake control signal to the hydraulic retarding brake unit according to the pedal displacement simulation signal.

[0010] Furthermore, the master brake valve has an electronic control module, which includes a switch device and a pedal displacement sensor, and both the switch device and the pedal displacement sensor are connected to the intelligent brake controller;

[0011] The switch device is used to detect the stepping action of the brake pedal, so as to generate the brake switch signal after the brake pedal is stepped on, and transmit the brake switch signal to the intelligent brake controller;

[0012] The pedal displacement sensor is used to detect the displacement of the brake pedal to generate the pedal displacement analog signal after the brake pedal is stepped on, and transmit the pedal displacement analog signal to the intelligent brake controller.

[0013] Furthermore, the total stroke of the valve core of the master brake valve includes a free stroke; when the valve core of the master brake valve is in the free stroke, the main brake unit does not brake, but the switch device and the pedal displacement sensor can be triggered.

[0014] Furthermore, the dump truck intelligent braking system further comprises a hydraulic slow manual control device, the hydraulic slow manual control device is connected to the hydraulic retarding braking unit, and the hydraulic slow manual control device is used to send a braking control signal to the hydraulic retarding braking unit;

[0015] When the intelligent brake controller and the hydraulic retarding manual control device send brake control signals to the hydraulic retarding brake unit at the same time, the hydraulic retarding brake unit responds to the brake control signal with the larger brake request between the two.

[0016] Furthermore, the dump truck intelligent braking system also includes an engine brake switch, which is connected to the engine brake unit and is used to send a brake control signal to the engine brake unit; the engine brake switch and the intelligent brake controller control the engine brake unit in parallel.

[0017] Further, the hydraulic retarding brake unit comprises a hydraulic retarder controller and a hydraulic retarder, wherein the hydraulic retarder controller is connected to the hydraulic retarder, and the hydraulic retarder controller is used to control the braking of the hydraulic retarder;

[0018] The engine brake unit comprises an engine controller and an engine, wherein the engine controller is connected to the engine and is used to control the braking of the engine;

[0019] The intelligent brake controller is connected to the hydraulic brake controller and the engine controller respectively, and is used to send a brake control signal to the hydraulic brake controller and the engine controller respectively according to the auxiliary brake signal.

[0020] Furthermore, the dump truck intelligent braking system also includes an accelerator pedal, which is connected to the intelligent brake controller; the intelligent brake controller is used to stop sending a braking control signal to the auxiliary brake unit after receiving an acceleration signal from the accelerator pedal.

[0021] Furthermore, the dump truck intelligent braking system has an intelligent braking mode. When the intelligent braking mode is turned on, the intelligent braking controller can send a braking control signal to the auxiliary braking unit according to the auxiliary braking signal; when the intelligent braking mode is turned off, the intelligent braking controller does not send a braking control signal to the auxiliary braking unit.

[0022] The dump truck intelligent braking system also includes an intelligent braking switch, which is connected to the intelligent braking controller and is used to control the on and off of the intelligent braking mode.

[0023] Further, the brake master valve has an air control module and an electric control module, the main brake unit is a pneumatic brake unit, the air control module is connected to the brake pedal and the pneumatic brake unit respectively, and the air control module is used to control the braking of the pneumatic brake unit when the brake pedal is stepped on; the electric control module is connected to the intelligent brake controller, and the electric control module is used to generate the auxiliary brake signal when the brake pedal is stepped on, and transmit the auxiliary brake signal to the intelligent brake controller;

[0024] Alternatively, the main brake valve has a hydraulic control module and an electronic control module, the main brake unit is a hydraulic brake unit, the hydraulic control module is connected to the brake pedal and the hydraulic brake unit respectively, and the hydraulic control module is used to control the braking of the hydraulic brake unit when the brake pedal is stepped on; the electronic control module is connected to the intelligent brake controller, and the electronic control module is used to generate the auxiliary brake signal when the brake pedal is stepped on, and transmit the auxiliary brake signal to the intelligent brake controller.

[0025] The present invention also provides a mining dump truck, comprising the dump truck intelligent braking system as described above.

[0026] The dump truck intelligent braking system provided by the present invention is provided with a main brake valve and an intelligent brake controller. The main brake valve has a braking control function and a braking signal generation and transmission function. When the driver steps on the brake pedal, the main brake valve can control the braking of the main brake unit according to the stroke of the brake pedal. At the same time, the main brake valve can generate an auxiliary braking signal and transmit the auxiliary braking signal to the intelligent brake controller. The intelligent brake controller sends a braking control signal to the auxiliary brake unit after receiving the auxiliary braking signal, so that the auxiliary brake unit performs auxiliary braking. In this way, when braking, the driver only needs to step on the brake pedal to control the main brake unit and the auxiliary brake unit to brake at the same time. During the braking process, the auxiliary brake unit can intervene in time, thereby increasing the use frequency of the auxiliary brake unit, reducing the loss of the main brake unit, and further reducing the wear of components such as friction plates and tires, and improving the life of the main brake unit and driving safety; at the same time, the dump truck intelligent braking system simplifies the braking operation, reduces or avoids the driver's misoperation during braking, improves the life of the braking equipment, further improves driving safety, and enhances the driver's driving experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 Schematic diagram of the structure of the intelligent braking system for a dump truck in an embodiment of the present invention.

[0028] Figure 2 Schematic diagram of the connection relationship between the master brake valve, the brake pedal, the intelligent brake controller and the main brake unit in an embodiment of the present invention.

[0029] Figure 3 Schematic diagram of the connection relationship between the master brake valve, the brake pedal, the intelligent brake controller and the main brake unit in another embodiment of the present invention.

[0030] Figure 4 Graph showing the characteristic curve of the master brake valve in an embodiment of the present invention. DETAILED DESCRIPTION

[0031] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0032] The terms "first", "second", "third", "fourth" and the like (if any) in the description and claims of the present invention are used to distinguish similar objects and are not necessarily used to describe a particular sequence or order.

[0033] The directional words such as up, down, left, right, front, back, top, bottom, etc. (if any) involved in the specification and claims of the present invention are defined by the positions of the structures in the drawings and the positions of the structures relative to each other, and are only for the clarity and convenience of expressing the technical solution. It should be understood that the use of directional words should not limit the scope of protection of the control signal of this application.

[0034] like Figure 1 and Figure 2 As shown, the dump truck intelligent brake system provided by the embodiment of the present invention includes a brake pedal 1, a brake master valve 2, an intelligent brake controller 3, a main brake unit 4 and an auxiliary brake unit 5. The main brake unit 4 plays a main braking role, and the auxiliary brake unit 5 plays an auxiliary braking role. The intelligent brake controller 3 can be an original controller in the dump truck, or an additional controller.

[0035] The main brake valve 2 is connected to the brake pedal 1 and the main brake unit 4 respectively; specifically, the main brake valve 2 is mechanically connected to the brake pedal 1, and the main brake valve 2 is signal-connected to the main brake unit 4 (generally an electrical signal connection). The main brake valve 2 is controlled by the brake pedal 1, and the main brake valve 2 is used to control the braking of the main brake unit 4 when the brake pedal 1 is stepped on; that is, the main brake valve 2 has the function of a traditional brake foot valve, which can control the braking of the main brake unit 4 (including the opening and closing of the braking of the main brake unit 4 and the magnitude of the braking force) according to the travel of the brake pedal 1 when the driver steps on the brake pedal 1.

[0036] The intelligent brake controller 3 is connected to the brake master valve 2 and the auxiliary brake unit 5 respectively; specifically, the intelligent brake controller 3 is connected to the brake master valve 2 and the auxiliary brake unit 5 by signals (generally by electrical signals). The brake master valve 2 is also used to generate an auxiliary brake signal (the auxiliary brake signal is generally an electrical signal) when the brake pedal 1 is stepped on, and transmit the auxiliary brake signal to the intelligent brake controller 3; the intelligent brake controller 3 is used to send a brake control signal to the auxiliary brake unit 5 according to the auxiliary brake signal, so that the auxiliary brake unit 5 performs auxiliary braking.

[0037] The existing dump truck braking system requires independent operation of the main braking system and the auxiliary braking system, and the operation of gears, switches and foot brakes is complicated and cumbersome. The driver tends to use the main brake frequently and for a long time during driving, while the utilization rate of the auxiliary brake is not high, which accelerates the wear of the friction plate and the tire, and the braking efficiency of the friction plate decreases rapidly. In severe cases, it leads to brake failure, which not only affects driving safety, but also requires frequent replacement of friction plates and tires, increasing costs.

[0038] The intelligent braking system for dump trucks in this embodiment is provided with a main brake valve 2 and an intelligent brake controller 3. The main brake valve 2 has both a brake control function and a brake signal generation and transmission function. When the driver steps on the brake pedal 1, the main brake valve 2 can control the braking of the main brake unit 4 according to the travel of the brake pedal 1. At the same time, the main brake valve 2 can generate an auxiliary brake signal and transmit the auxiliary brake signal to the intelligent brake controller 3. The intelligent brake controller 3 sends a brake control signal to the auxiliary brake unit 5 after receiving the auxiliary brake signal, so that the auxiliary brake unit 5 performs auxiliary braking. When braking, the driver only needs to step on the brake pedal 1 to control the main brake unit 4 and the auxiliary brake unit 5 to brake at the same time. During the braking process, the auxiliary brake unit 5 can intervene in time, thereby increasing the use frequency of the auxiliary brake unit 5, reducing the loss of the main brake unit 4, and further reducing the wear of components such as friction plates and tires, and improving the life of the main brake unit 4 and driving safety.

[0039] At the same time, the existing dump truck braking system is prone to driver error because the main braking system and the auxiliary braking system need to be operated independently. For example, the driver may directly turn on the engine cylinder brake during driving without turning on the hydraulic retarder brake in time. Relying solely on the engine cylinder brake may cause the engine to exceed the specified speed, thereby causing serious faults such as engine burning or even cylinder pulling.

[0040] The intelligent braking system for the dump truck of the present embodiment can control the main brake unit 4 and the auxiliary brake unit 5 for braking at the same time by stepping on the brake pedal 1, thereby simplifying the braking operation, reducing or avoiding the driver's misoperation during braking, and increasing the life of the braking equipment (for example, it can protect the engine and avoid independent braking of the engine so that its speed exceeds the specified speed), further improving driving safety, and enhancing the driver's driving experience.

[0041] Furthermore, if Figure 1 As shown, in this embodiment, the intelligent braking system of the dump truck has an intelligent braking mode. When the intelligent braking mode is turned on, the intelligent braking controller 3 can send a braking control signal to the auxiliary braking unit 5 according to the auxiliary braking signal; when the intelligent braking mode is turned off, the intelligent braking controller 3 does not send a braking control signal to the auxiliary braking unit 5. The intelligent braking system of the dump truck also includes an intelligent braking switch 9, which is connected to the intelligent braking controller 3 (specifically, an electrical signal connection), and the intelligent braking switch 9 is used to control the opening and closing of the intelligent braking mode.

[0042] Specifically, the smart brake switch 9 can be a control element such as a button, a knob, or an instrument arranged on the dump truck. In a scenario where smart braking is applicable, the driver turns on the smart brake mode by operating the smart brake switch 9; in a scenario where smart braking is not applicable, such as on icy and snowy roads, the driver turns off the smart brake mode by operating the smart brake switch 9 to ensure driving safety.

[0043] Furthermore, if Figure 1 and Figure 2 As shown, in this embodiment, the main brake unit 4 is a pneumatic brake unit 41, that is, the main brake unit 4 adopts pneumatic braking. The brake master valve 2 has an air control module 22 and an electric control module 21. The air control module 22 is connected to the brake pedal 1 and the pneumatic brake unit 41 respectively. The air control module 22 is used to control the braking of the pneumatic brake unit 41 when the brake pedal 1 is stepped on. The electric control module 21 is connected to the intelligent brake controller 3, specifically, the electric control module 21 is connected to the intelligent brake controller 3 by electrical signals; the electric control module 21 is used to generate an auxiliary brake signal (the auxiliary brake signal is an electrical signal) when the brake pedal 1 is stepped on, and transmit the auxiliary brake signal to the intelligent brake controller 3.

[0044] Specifically, in the present embodiment, the brake master valve 2 is a foot valve with electric control and air control dual-circuit signals. The brake master valve 2 itself is not subject to electric control or air control. In the brake system, the brake master valve 2 is only used as a brake signal generating device. The air control module 22 includes a valve body (not shown), a push rod, a piston, a return spring, an air inlet, an air outlet and other structures. The push rod of the air control module 22 is mechanically connected to the brake pedal 1, the air inlet of the air control module 22 is connected to the air reservoir (not shown) through an air path, and the air outlet of the air control module 22 is connected to the air pressure brake unit 41 through an air path. The air pressure brake unit 41 specifically includes a brake air chamber (not shown) and a valve group and other structures. After the driver steps on the brake pedal 1, the brake pedal 1 pushes the valve core of the brake master valve 2 to move, so that the air control module 22 opens, and the compressed air in the air reservoir enters the brake air chamber through the air control module 22, thereby performing pneumatic braking, and adjusting the size of the pneumatic pressure force according to the stroke of the brake pedal 1 (that is, the stroke of the valve core of the brake master valve 2); at the same time, after the driver steps on the brake pedal 1, the electric control module 21 generates an auxiliary braking signal and transmits the auxiliary braking signal to the intelligent brake controller 3, so that the auxiliary brake unit 5 performs auxiliary braking. For the structure of the foot valve with both electric control and air control dual-circuit signals, please refer to the existing technology (such as patent CN201970990U, etc.), which will not be repeated here.

[0045] like Figure 3 As shown, in another embodiment, the main brake unit 4 is a hydraulic brake unit 42, that is, the main brake unit 4 adopts hydraulic braking. The brake master valve 2 has a hydraulic control module 23 and an electric control module 21. The hydraulic control module 23 is connected to the brake pedal 1 and the hydraulic brake unit 42 respectively. The hydraulic control module 23 is used to control the braking of the hydraulic brake unit 42 when the brake pedal 1 is stepped on. The electric control module 21 is connected to the intelligent brake controller 3. The electric control module 21 is used to generate an auxiliary brake signal when the brake pedal 1 is stepped on, and transmit the auxiliary brake signal to the intelligent brake controller 3.

[0046] Specifically, in this embodiment, the brake master valve 2 is a foot valve with electric control and hydraulic control dual-circuit signals. The hydraulic control module 23 includes a brake master cylinder (not shown), a piston rod, a piston, a return spring, a liquid inlet, a liquid outlet and other structures. The piston rod of the hydraulic control module 23 is mechanically connected to the brake pedal 1, the liquid inlet of the hydraulic control module 23 is connected to the oil pot (not shown) through an oil circuit, and the liquid outlet of the hydraulic control module 23 is connected to the hydraulic brake unit 42 through an oil circuit. The hydraulic brake unit 42 specifically includes a brake wheel cylinder (not shown) and a valve group and other structures. After the driver steps on the brake pedal 1, the brake pedal 1 pushes the valve core of the brake master valve 2 to move, so that the hydraulic control module 23 is opened, and the hydraulic oil in the oil tank enters the brake wheel cylinder through the hydraulic control module 23, thereby performing hydraulic braking, and adjusting the size of the hydraulic braking force according to the stroke of the brake pedal 1 (that is, the stroke of the valve core of the brake master valve 2); at the same time, after the driver steps on the brake pedal 1, the electronic control module 21 generates an auxiliary braking signal and transmits the auxiliary braking signal to the intelligent brake controller 3, so that the auxiliary brake unit 5 performs auxiliary braking. The structure of the foot valve with both electronic and hydraulic control dual-circuit signals can be referred to the prior art, which will not be repeated here.

[0047] Furthermore, if Figure 1 and Figure 4 As shown, in this embodiment, after the driver steps on the brake pedal 1, the brake pedal 1 will push the valve core of the brake main valve 2 to move, and the valve core of the brake main valve 2 has a certain stroke when moving. The total stroke of the valve core of the brake main valve 2 includes a free stroke and a main braking stroke, and the free stroke and the main braking stroke are sequentially arranged along the stepping direction of the brake pedal 1 during braking; when the valve core of the brake main valve 2 is in the free stroke, the main brake unit 4 does not brake (that is, in Figure 4 In the process, the brake master valve 2 will not generate a brake air pressure signal; this is common knowledge), but at this time the brake master valve 2 will generate an auxiliary brake signal (i.e. Figure 4 The voltage signal in the brake master valve 2 is transmitted to the intelligent brake controller 3 to enable the auxiliary brake unit 5 to perform auxiliary braking; when the valve core of the brake master valve 2 is in the main braking stroke, the main brake unit 4 performs braking (i.e., in Figure 4 In the process, the brake master valve 2 will generate a brake air pressure signal), and the brake master valve 2 will also generate an auxiliary brake signal (i.e. Figure 4 ) and transmits it to the intelligent brake controller 3, so that the auxiliary brake unit 5 performs auxiliary braking. In other words, after the driver steps on the brake pedal 1, the brake master valve 2 will immediately generate an auxiliary brake signal and transmit it to the intelligent brake controller 3 (that is, the auxiliary brake gear in the brake master valve 2 is set in the free travel of the brake master valve 2), so that the auxiliary brake unit 5 intervenes in time to perform auxiliary braking, and the main brake unit 4 does not brake in the free travel stage, so that the auxiliary brake unit 5 can intervene in advance to perform braking, improve the braking efficiency, and further increase the use frequency of the auxiliary brake unit 5, reducing the loss of the main brake unit 4.

[0048] Furthermore, if Figure 1 As shown, in this embodiment, the auxiliary brake unit 5 includes a hydraulic retarding brake unit 51 and an engine brake unit 52, and the intelligent brake controller 3 is connected to the hydraulic retarding brake unit 51 and the engine brake unit 52 respectively. The intelligent brake controller 3 is used to send a brake control signal to the hydraulic retarding brake unit 51 and the engine brake unit 52 respectively according to the auxiliary brake signal, so that the hydraulic retarding brake unit 51 and the engine brake unit 52 perform auxiliary braking. Of course, in other embodiments, the auxiliary brake unit 5 can also be provided with only one of the hydraulic retarding brake unit 51 and the engine brake unit 52, or the auxiliary brake unit 5 can also be provided with other types of auxiliary brake devices.

[0049] Specifically, the hydraulic retarder brake unit 51 is used for hydraulic retarder braking, and the hydraulic retarder brake unit 51 includes a hydraulic retarder controller 511 and a hydraulic retarder 512, and the hydraulic retarder controller 511 is connected to the hydraulic retarder 512, and the hydraulic retarder controller 511 is used to control the braking of the hydraulic retarder 512. The engine brake unit 52 is used for engine braking, and the engine brake unit 52 includes an engine controller 521 and an engine 522, and the engine controller 521 is connected to the engine 522, and the engine controller 521 is used to control the braking of the engine 522; wherein the braking form of the engine 522 includes in-cylinder braking and exhaust braking. The intelligent brake controller 3 is connected to the hydraulic retarder controller 511 and the engine controller 521 respectively (specifically, an electrical signal connection). The intelligent brake controller 3 is used to send a brake control signal to the hydraulic retarder controller 511 and the engine controller 521 respectively according to the auxiliary brake signal. The hydraulic retarder controller 511 and the engine controller 521 judge whether to work and exit according to the current working conditions (such as the temperature of the working medium and the coolant, the speed of the engine, etc.) and in combination with their own conditions, so as to control the braking of the hydraulic retarder 512 and the engine 522. The hydraulic retarder brake unit 51 and the engine brake unit 52 are existing devices on dump trucks. For their structure and working principle, please refer to the existing technology and will not be repeated here.

[0050] Further, in this embodiment, the auxiliary brake signal generated by the brake master valve 2 includes a brake switch signal and a pedal displacement analog signal ( Figure 4The voltage signal indicated in the figure is a pedal displacement analog signal); the brake switch signal is a voltage signal generated when the driver steps on the brake pedal 1, and the brake switch signal reflects whether the driver has a braking intention; the pedal displacement analog signal is a voltage signal generated according to the displacement of the driver's stepping on the brake pedal 1 (that is, the displacement of the valve core of the brake master valve 2), and the pedal displacement analog signal reflects the magnitude of the braking force the driver wants to provide. The intelligent brake controller 3 is used to send a brake control signal to the engine brake unit 52 according to the brake switch signal, and the intelligent brake controller 3 is used to send a brake control signal to the hydraulic retarding brake unit 51 according to the pedal displacement analog signal.

[0051] Specifically, since the engine brake unit 52 generally has no gear setting when performing engine braking (i.e., the engine brake has only two states, open and closed), the intelligent brake controller 3 only needs to send a brake on / off signal to the engine brake unit 52 according to the brake switch signal. The hydraulic retarding brake unit 51 has a gear setting. The hydraulic retarding brake unit 51 generally has 5 gears, including a "constant speed gear" 1 and 4 "brake gears" 2 to 5. The braking forces of gears 2 to 5 correspond to 25%, 50%, 75% and 100% of the maximum braking torque of the hydraulic retarder 512, respectively. The "constant speed gear" provides a floating braking force to keep the vehicle speed basically unchanged; therefore, the intelligent brake controller 3 needs to perform calculations and processing based on the pedal displacement analog signal, so as to send a brake control signal corresponding to the brake gear to the hydraulic retarding brake unit 51. The number of gears of the hydraulic retarding brake unit 51, the size of the hydraulic retarding braking force corresponding to each gear, the gear interval, etc. can be set according to actual needs.

[0052] Furthermore, if Figure 1 and Figure 2 As shown, in this embodiment, the electronic control module 21 in the brake master valve 2 includes a switch device 211 (the switch device 211 is, for example, a micro switch, etc.) and a pedal displacement sensor 212, and the switch device 211 and the pedal displacement sensor 212 are both connected to the intelligent brake controller 3 (specifically, an electrical signal connection). The switch device 211 is used to detect the stepping action of the brake pedal 1, so as to generate the brake switch signal after the brake pedal 1 is stepped on, and transmit the brake switch signal to the intelligent brake controller 3. The pedal displacement sensor 212 is used to detect the displacement of the brake pedal 1 (that is, the displacement of the valve core of the brake master valve 2), so as to generate the pedal displacement analog signal after the brake pedal 1 is stepped on, and transmit the pedal displacement analog signal to the intelligent brake controller 3.

[0053] The switch device 211 and the pedal displacement sensor 212 are set corresponding to the free travel of the valve core of the brake master valve 2. When the valve core of the brake master valve 2 is in the free travel, the main brake unit 4 does not brake, but the switch device 211 and the pedal displacement sensor 212 can be triggered so that the auxiliary brake unit 5 can intervene in time to assist braking in the free travel stage. The switch device 211 and the pedal displacement sensor 212 can be specifically set in the valve body of the brake master valve 2 or on the push rod. When the driver steps on the brake pedal 1, the switch device 211 is turned on through the push rod, piston, return spring and other structures, and the brake switch signal generated by the switch device 211 is transmitted to the intelligent brake controller 3; at the same time, the pedal displacement sensor 212 collects the displacement of the brake pedal 1, and generates a pedal displacement analog signal to transmit to the intelligent brake controller 3. When the brake is released, the driver releases the brake pedal 1, and each component moves in the opposite direction to reset, so that the switch device 211 is disconnected. At this time, the switch device 211 does not send an electrical signal to the intelligent brake controller 3.

[0054] The specific arrangement positions of the switch device 211 and the pedal displacement sensor 212 can refer to the prior art, and will not be elaborated here as long as it can achieve the above-mentioned purpose.

[0055] Furthermore, if Figure 1 As shown, in this embodiment, the intelligent braking system of the dump truck further includes a hydraulic manual control device 6, which is connected to the hydraulic retarding brake unit 51 (specifically, the hydraulic manual control device 6 is electrically connected to the hydraulic controller 511), and the hydraulic manual control device 6 is used to send a braking control signal to the hydraulic retarding brake unit 51. The hydraulic manual control device 6 and the intelligent brake controller 3 control the hydraulic retarding brake unit 51 in parallel, that is, the two can control the hydraulic retarding brake unit 51 separately. When the intelligent brake controller 3 and the hydraulic manual control device 6 send a braking control signal to the hydraulic retarding brake unit 51 at the same time, the hydraulic retarding brake unit 51 responds to the braking control signal with the larger braking request (for example, the intelligent brake controller 3 sends a second-gear braking control signal to the hydraulic retarding brake unit 51, and the hydraulic manual control device 6 sends a third-gear braking control signal to the hydraulic retarding brake unit 51, then the hydraulic retarding brake unit 51 responds to the third-gear braking control signal of the hydraulic manual control device 6).

[0056] Specifically, in the present embodiment, the hydraulic retarder manual control device 6 is a hydraulic retarder handle (the hydraulic retarder handle is an existing device in the dump truck; of course, the hydraulic retarder manual control device 6 can also be other manual control components). The driver can select a suitable braking gear through the hydraulic retarder manual control device 6 according to different braking force requirements. The hydraulic retarder controller 511 controls the electromagnetic proportional valve according to the gear, thereby controlling the amount of oil entering the hydraulic retarder 512 to achieve the purpose of manually controlling the braking torque. Therefore, when the dump truck is not performing intelligent braking (when the intelligent brake switch 9 is turned off), the driver can also perform hydraulic retarder braking by operating the hydraulic retarder manual control device 6. The hydraulic retarder handle is an existing device on the dump truck. For its structure and working principle, please refer to the prior art, which will not be repeated here.

[0057] Furthermore, if Figure 1 As shown, in this embodiment, the intelligent braking system of the dump truck also includes an engine brake switch 7, which is connected to the engine brake unit 52 (specifically, the engine brake switch 7 is electrically connected to the engine controller 521), and the engine brake switch 7 is used to send a brake control signal to the engine brake unit 52 to control the opening and closing of the engine brake. The engine brake switch 7 and the intelligent brake controller 3 control the engine brake unit 52 in parallel, that is, the two can control the engine brake unit 52 separately. Therefore, when the dump truck is not performing intelligent braking (when the intelligent brake switch 9 is turned off), the driver can also perform engine braking by operating the engine brake switch 7. The engine brake switch 7 is an existing device on the dump truck. For its structure and working principle, please refer to the existing technology, which will not be repeated here.

[0058] Furthermore, if Figure 1 As shown, in this embodiment, the hydraulic brake controller 511 is connected to the engine controller 521 (specifically, an electrical signal connection). The hydraulic brake controller 511 is used to automatically send a braking request to the engine controller 521 after receiving a braking control signal (including a braking control signal issued by the intelligent braking controller 3 and the hydraulic brake manual control device 6), so that the engine 522 intervenes to perform combined braking.

[0059] Furthermore, if Figure 1As shown, in this embodiment, the intelligent braking system of the dump truck also includes an accelerator pedal 8 (for example, a gas pedal), and the accelerator pedal 8 is connected to the intelligent brake controller 3 and the engine controller 521 respectively (specifically, the accelerator pedal 8 is equipped with a sensor, and the sensor is used to detect the acceleration signal of the accelerator pedal 8, and the sensor is connected to the intelligent brake controller 3 and the engine controller 521 by electrical signals respectively). The engine controller 521 is used to control the operation of the engine 522 (for example, increase the speed) after receiving the acceleration signal of the accelerator pedal 8. The intelligent brake controller 3 is used to stop sending a brake control signal to the auxiliary brake unit 5 after receiving the acceleration signal of the accelerator pedal 8 (indicating that the driver has the intention to accelerate at this time), thereby ending the auxiliary braking.

[0060] Furthermore, in this embodiment, the intelligent braking system of the dump truck further includes a vehicle speed sensor (not shown), which is used to detect the speed of the dump truck, and the vehicle speed sensor may be a wheel speed sensor, etc. The vehicle speed sensor is connected to the intelligent braking controller 3 (specifically, an electrical signal connection). During braking, the intelligent braking controller 3 can calculate the actual deceleration of the dump truck according to the speed detected by the vehicle speed sensor, and according to the difference between the actual deceleration of the dump truck and the target deceleration, correct the braking control signal sent to the auxiliary braking unit 5, thereby realizing the closed-loop control of the driver's braking intention and the vehicle speed change, and improving the accuracy of the braking operation.

[0061] The embodiment of the present invention further provides a mining dump truck, comprising the above-mentioned intelligent braking system for a dump truck. The mining dump truck may be a wide-body mining dump truck or the like.

[0062] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. An intelligent braking system for a dump truck, characterized in that: The invention comprises a brake pedal (1), a brake master valve (2), an intelligent brake controller (3), a main brake unit (4) and an auxiliary brake unit (5), wherein the brake master valve (2) is connected to the brake pedal (1) and the main brake unit (4) respectively, and the brake master valve (2) is used to control the braking of the main brake unit (4) when the brake pedal (1) is stepped on; The intelligent brake controller (3) is connected to the main brake valve (2) and the auxiliary brake unit (5) respectively; the main brake valve (2) is also used to generate an auxiliary brake signal when the brake pedal (1) is stepped on, and transmit the auxiliary brake signal to the intelligent brake controller (3); the intelligent brake controller (3) is used to send a brake control signal to the auxiliary brake unit (5) according to the auxiliary brake signal, so that the auxiliary brake unit (5) performs auxiliary braking.

2. The intelligent braking system for dump trucks according to claim 1, characterized in that: The auxiliary brake unit (5) comprises a hydraulic retarding brake unit (51) and an engine brake unit (52); the intelligent brake controller (3) is connected to the hydraulic retarding brake unit (51) and the engine brake unit (52), respectively; the intelligent brake controller (3) is used to send a brake control signal to the hydraulic retarding brake unit (51) and the engine brake unit (52) according to the auxiliary brake signal.

3. The intelligent braking system for dump trucks according to claim 2, characterized in that: The auxiliary brake signal comprises a brake switch signal and a pedal displacement simulation signal; the intelligent brake controller (3) is used to send a brake control signal to the engine brake unit (52) according to the brake switch signal, and the intelligent brake controller (3) is used to send a brake control signal to the hydraulic retarding brake unit (51) according to the pedal displacement simulation signal.

4. The intelligent braking system for dump trucks according to claim 3, characterized in that: The brake master valve (2) has an electric control module (21), the electric control module (21) comprises a switch device (211) and a pedal displacement sensor (212), and the switch device (211) and the pedal displacement sensor (212) are both connected to the intelligent brake controller (3); The switch device (211) is used to detect the stepping action of the brake pedal (1), so as to generate the brake switch signal after the brake pedal (1) is stepped on, and transmit the brake switch signal to the intelligent brake controller (3); The pedal displacement sensor (212) is used to detect the displacement of the brake pedal (1) to generate a pedal displacement analog signal after the brake pedal (1) is stepped on, and transmit the pedal displacement analog signal to the intelligent brake controller (3).

5. The intelligent braking system for dump trucks according to claim 4, characterized in that: The total stroke of the valve core of the main brake valve (2) includes a free stroke; when the valve core of the main brake valve (2) is in the free stroke, the main brake unit (4) does not brake, but the switch device (211) and the pedal displacement sensor (212) can both be triggered.

6. The intelligent braking system for dump trucks according to claim 2, characterized in that: The dump truck intelligent braking system further comprises a hydraulic manual control device (6), wherein the hydraulic manual control device (6) is connected to the hydraulic retarding braking unit (51), and the hydraulic manual control device (6) is used to send a braking control signal to the hydraulic retarding braking unit (51); When the intelligent brake controller (3) and the hydraulic manual brake control device (6) simultaneously send brake control signals to the hydraulic retarding brake unit (51), the hydraulic retarding brake unit (51) responds to the brake control signal with the greater brake request between the two.

7. The intelligent braking system for dump trucks according to claim 2, characterized in that: The dump truck intelligent braking system further comprises an engine braking switch (7), wherein the engine braking switch (7) is connected to the engine braking unit (52), and the engine braking switch (7) is used to send a braking control signal to the engine braking unit (52); the engine braking switch (7) and the intelligent braking controller (3) control the engine braking unit (52) in parallel.

8. The intelligent braking system for dump trucks according to claim 2, characterized in that: The hydraulic retarding brake unit (51) comprises a hydraulic retarding controller (511) and a hydraulic retarder (512), wherein the hydraulic retarding controller (511) is connected to the hydraulic retarder (512), and the hydraulic retarding controller (511) is used to control the braking of the hydraulic retarder (512); The engine braking unit (52) comprises an engine controller (521) and an engine (522), wherein the engine controller (521) is connected to the engine (522), and the engine controller (521) is used to control the braking of the engine (522); The intelligent brake controller (3) is connected to the hydraulic brake controller (511) and the engine controller (521) respectively, and the intelligent brake controller (3) is used to send a brake control signal to the hydraulic brake controller (511) and the engine controller (521) respectively according to the auxiliary brake signal.

9. The intelligent braking system for dump trucks according to claim 1, characterized in that: The dump truck intelligent braking system also includes an accelerator pedal (8), which is connected to the intelligent braking controller (3); the intelligent braking controller (3) is used to stop sending a braking control signal to the auxiliary braking unit (5) after receiving an acceleration signal from the accelerator pedal (8).

10. The intelligent braking system for dump trucks according to claim 1, characterized in that: The dump truck intelligent braking system has an intelligent braking mode. When the intelligent braking mode is turned on, the intelligent braking controller (3) can send a braking control signal to the auxiliary braking unit (5) according to the auxiliary braking signal; when the intelligent braking mode is turned off, the intelligent braking controller (3) does not send a braking control signal to the auxiliary braking unit (5); The dump truck intelligent braking system further comprises an intelligent braking switch (9), wherein the intelligent braking switch (9) is connected to the intelligent braking controller (3), and the intelligent braking switch (9) is used to control the on and off of the intelligent braking mode.

11. The intelligent braking system for a dump truck according to any one of claims 1 to 10, characterized in that: The main brake valve (2) comprises an air control module (22) and an electric control module (21); the main brake unit (4) is a pneumatic brake unit (41); the air control module (22) is connected to the brake pedal (1) and the pneumatic brake unit (41) respectively; the air control module (22) is used to control the braking of the pneumatic brake unit (41) when the brake pedal (1) is stepped on; the electric control module (21) is connected to the intelligent brake controller (3); the electric control module (21) is used to generate the auxiliary brake signal when the brake pedal (1) is stepped on, and transmit the auxiliary brake signal to the intelligent brake controller (3); Alternatively, the main brake valve (2) has a hydraulic control module (23) and an electric control module (21); the main brake unit (4) is a hydraulic brake unit (42); the hydraulic control module (23) is connected to the brake pedal (1) and the hydraulic brake unit (42) respectively; the hydraulic control module (23) is used to control the braking of the hydraulic brake unit (42) when the brake pedal (1) is stepped on; the electric control module (21) is connected to the intelligent brake controller (3); the electric control module (21) is used to generate the auxiliary brake signal when the brake pedal (1) is stepped on, and transmit the auxiliary brake signal to the intelligent brake controller (3).

12. A mining dump truck, characterized in that: It comprises the intelligent braking system for a dump truck as claimed in any one of claims 1 to 11.

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