A dump truck lifting alarm monitoring device and lifting height control method

Abstract

This invention proposes a dump truck lifting alarm monitoring device and a lifting height control method. The device includes a control module, a flow acquisition module, a pneumatically controlled directional valve, and a lifting module. The pneumatically controlled directional valve is connected to the inlet of the flow acquisition module; the lifting module is connected to the outlet of the flow acquisition module. The flow acquisition module monitors in real time the first oil volume information flowing into the lifting cylinder from the pneumatically controlled directional valve through the inlet, and the second oil volume information flowing out of the lifting cylinder through the outlet. The lifting cylinder is located in the lifting module. The control module is connected to the flow acquisition module to acquire the first and second oil volume information, and determines the change in hydraulic oil volume in the lifting cylinder based on the first and second oil volume information. The lifting height and working status are judged by the change in hydraulic oil volume. Based on this device, a dump truck lifting height control method is also proposed. This invention is applicable to various complex working conditions, has high reliability, and has the function of real-time and accurate feedback of lifting height.

Description

Technical Field

[0001] This invention belongs to the field of dump truck lifting control technology, and specifically relates to a dump truck lifting alarm monitoring device and a lifting height control method. Background Technology

[0002] With the expansion of the infrastructure market, the market for dump trucks continues to grow. Dump trucks are characterized by heavy load capacity, convenient unloading, and adaptability to complex working conditions. Among these features, the lifting and unloading device saves a significant amount of labor and improves work efficiency. However, due to the complex operating conditions of dump trucks, the diverse types of goods they carry, the limitations of loading and unloading sites, and the lack of standardized management systems, coupled with the fact that the lifting switch is generally located in the cab, the driver cannot accurately control the lifting height and cannot be aware of emergencies near the work site. This is especially true in areas with crowded personnel and height restrictions during unloading, which can easily lead to accidents.

[0003] Dump trucks all include lifting alarm devices during the lifting process. These devices include push-button type, electromagnetic type, normally closed circuit type, and control handle detection type. Considering the complex working conditions of dump trucks, push-button, electromagnetic, and normally closed types are prone to failure and may not be able to monitor the lifting system's operational status. Control handle detection devices cannot accurately control the lifting height. Therefore, in existing technologies, during the lifting or lowering process of dump trucks, the driver can accurately monitor and control the lifting height from the cab, and simultaneously issue specific alarm prompts based on different lifting actions. Summary of the Invention

[0004] To address the aforementioned technical problems, this invention proposes a dump truck lifting alarm monitoring device and a lifting height control method. This allows the driver to accurately monitor and control the lifting height from the cab during the lifting or lowering process of the dump truck, and simultaneously issues specific alarm prompts based on different lifting behaviors.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A dump truck lifting alarm monitoring device includes a control module 4, a flow acquisition module 3, a pneumatic reversing valve 2, and a lifting module 8;

[0007] The pneumatically controlled directional valve 2 is connected to the inlet of the flow acquisition module 3; the lifting module 8 is connected to the outlet of the flow acquisition module 3.

[0008] The flow acquisition module 3 is used to monitor in real time the first oil volume information flowing into the lifting cylinder from the pneumatic reversing valve 2 through the inlet, and to monitor in real time the second oil volume information flowing out of the lifting cylinder through the outlet; the lifting cylinder is located in the lifting module 8;

[0009] The control module 4 is connected to the flow acquisition module 3 and is used to acquire first oil quantity information and second oil quantity information, and determine the change in hydraulic oil volume in the lifting cylinder based on the first oil quantity information and second oil quantity information. The lifting height and working status of the dump truck are determined by the change in hydraulic oil volume.

[0010] Furthermore, the flow acquisition module 3 includes a first turbine flow sensor 10, a second turbine flow sensor 20, a first set of one-way valves, and a second set of one-way valves;

[0011] The first set of check valves includes a first check valve 11 and a second check valve 12; the second set of check valves includes a third check valve 21 and a fourth check valve 22.

[0012] The first turbine flow sensor 10 is located between the first check valve 11 and the second check valve 12; the second turbine flow sensor 20 is located between the third check valve 21 and the fourth check valve 22; and both the first turbine flow sensor 10 and the second turbine flow sensor 20 are connected to the control module 4.

[0013] Furthermore, when the dump truck is in the lifting state, the first turbine flow sensor 10 is working and the second turbine flow sensor 20 is not working; when the dump truck is in the lowering state, the first turbine flow sensor 10 is not working and the second turbine flow sensor 20 is working.

[0014] Furthermore, the device also includes a display module 5;

[0015] The control module 4 is communicatively connected to the display module 5; the display module 5 is used to display the working status and lifting height of the lifting module 8.

[0016] Furthermore, the device also includes an alarm device 6;

[0017] The alarm device 6 is used to display the working status of the lifting module 8.

[0018] Furthermore, the device also includes a gear pump 1 and a hydraulic oil tank 9; both the gear pump 1 and the hydraulic oil tank 9 are connected to the pneumatically controlled directional valve 2.

[0019] During the lifting process, the power take-off switch is turned on, and the power take-off on the gearbox transmits the engine power to the gear pump 1. The gear pump 1 pressurizes the hydraulic oil in the hydraulic oil tank 9 and sends it to the pneumatically controlled directional valve 2.

[0020] Furthermore, the flow acquisition module 3 is installed inside the vehicle frame, horizontally, and the horizontal length of the interface pipes at both ends of the flow acquisition module 3 is 2-3 times the length of the flow acquisition module 3.

[0021] This invention also proposes a method for controlling the lifting height of a dump truck, which is based on a dump truck lifting alarm monitoring device, and includes the following steps:

[0022] The flow acquisition module 3 monitors in real time the first oil volume flowing into the lifting cylinder and the second oil volume flowing out of the lifting cylinder;

[0023] The control module 4 establishes a connection with the flow acquisition module 3 to obtain the first oil volume information and the second oil volume information. Based on the first oil volume information and the second oil volume information, the change in the hydraulic oil volume in the lifting cylinder is determined. The lifting height and working status of the dump truck are judged by the change in the hydraulic oil volume.

[0024] Furthermore, the method also includes setting the hydraulic oil volume V in the lifting cylinder at the highest lifting point. max ; 0 < V t ≤V max ;where V t Let t be the sum of the first and second fuel quantity information at time t, where the first fuel quantity information is a positive value and the second fuel quantity information is a negative value.

[0025] Furthermore, the method also includes:

[0026] When V t -V t-1 When the value is greater than 0, the working status is "lifting", and the display module 5 displays the lifting height H. t ;where V t-1 It is the sum of the first and second oil quantity information at time t-1;

[0027] When V t =V t-1 At this time, the working status is "stopped"; display module 5 displays the lifting height H. t ;

[0028] When V t -V t-1 When the height is less than 0, the working status is "lowering", and the display module 5 displays the lifting height H. t .

[0029] The effects described in the invention are merely those of the embodiments, and not all the effects of the invention. One of the above technical solutions has the following advantages or beneficial effects:

[0030] This invention proposes a dump truck lifting alarm monitoring device and a lifting height control method. The device includes a control module, a flow acquisition module, a pneumatically controlled directional valve, and a lifting module. The pneumatically controlled directional valve is connected to the inlet of the flow acquisition module; the lifting module is connected to the outlet of the flow acquisition module. The flow acquisition module is used to monitor in real time the first oil volume information flowing into the lifting cylinder from the pneumatically controlled directional valve through the inlet, and to monitor in real time the second oil volume information flowing out of the lifting cylinder through the outlet. The lifting cylinder is located in the lifting module. The control module is connected to the flow acquisition module to acquire the first and second oil volume information, and to determine the change in hydraulic oil volume in the lifting cylinder based on the first and second oil volume information. The lifting height and working status of the dump truck are determined by the change in hydraulic oil volume. Based on the dump truck lifting alarm monitoring device, a dump truck lifting height control method is also proposed. Compared with existing dump truck lifting alarm devices, this invention can be applied to various complex working conditions, has high reliability, and has the function of real-time and accurate feedback of lifting height.

[0031] This invention enables the driver to accurately monitor and control the lifting height of the dump truck from the cab during the lifting or lowering process, and to issue specific alarm prompts based on different lifting behaviors. Attached Figure Description

[0032] like Figure 1 This is a schematic diagram of the connection of a dump truck lifting alarm monitoring device according to Embodiment 1 of the present invention;

[0033] like Figure 2 This is a schematic diagram of the connection process of the dump truck lifting process proposed in Embodiment 1 of the present invention;

[0034] like Figure 3 This is a schematic diagram of the lowering process of the dump truck as proposed in Embodiment 1 of the present invention;

[0035] like Figure 4 This is a flowchart of the control signal processing in a dump truck lifting height control method proposed in Embodiment 2 of the present invention;

[0036] Legend: 0-Relief valve, 1-Gear pump, 2-Pneumatic directional valve, 3-Flow acquisition module, 4-Control module, 5-Display module, 6-Alarm device, 7-Manual valve, 8-Lifting module, 9-Hydraulic tank, 10-First turbine flow sensor, 11-First check valve, 12-Second check valve, 20-Second turbine flow sensor, 21-Third check valve, 22-Fourth check valve. Detailed Implementation

[0037] To clearly illustrate the technical features of this solution, the invention will be described in detail below through specific embodiments and in conjunction with the accompanying drawings. The following disclosure provides many different embodiments or examples for implementing different structures of the invention. To simplify the disclosure, components and arrangements of specific examples are described below. Furthermore, reference numerals and / or letters may be repeated in different examples. This repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. It should be noted that the components illustrated in the drawings are not necessarily drawn to scale. Descriptions of well-known components and processing techniques and processes are omitted to avoid unnecessarily limiting the invention.

[0038] Example 1

[0039] Embodiment 1 of the present invention proposes a dump truck lifting alarm monitoring device, which, compared with existing dump truck lifting alarm devices, can be applied to a variety of complex working conditions, has high reliability, and has the function of real-time and accurate feedback of lifting height.

[0040] like Figure 1 This is a schematic diagram of the connection of a dump truck lifting alarm monitoring device according to Embodiment 1 of the present invention; the device includes a control module 4, a flow acquisition module 3, a pneumatic reversing valve 2, and a lifting module 8; the pneumatic reversing valve 2 is connected to the inlet of the flow acquisition module 3; the lifting module 8 is connected to the outlet of the flow acquisition module 3;

[0041] The flow acquisition module 3 is used to monitor in real time the first oil volume information flowing into the lifting cylinder from the pneumatic reversing valve 2 through the inlet, and to monitor in real time the second oil volume information flowing out of the lifting cylinder through the outlet; the lifting cylinder is located in the lifting module 8;

[0042] The control module 4 is connected to the flow acquisition module 3 to acquire the first oil volume information and the second oil volume information, and to determine the change in hydraulic oil volume in the lifting cylinder based on the first oil volume information and the second oil volume information. The lifting height and working status of the dump truck are determined by the change in hydraulic oil volume.

[0043] The flow acquisition module 3 includes a first turbine flow sensor 10, a second turbine flow sensor 20, a first set of check valves, and a second set of check valves;

[0044] The first group of check valves includes a first check valve 11 and a second check valve 12; the second group of check valves includes a third check valve 21 and a fourth check valve 22.

[0045] The first turbine flow sensor 10 is located between the first check valve 11 and the second check valve 12; the second turbine flow sensor 20 is located between the third check valve 21 and the fourth check valve 22; and both the first turbine flow sensor 10 and the second turbine flow sensor 20 are connected to the control module 4.

[0046] The flow acquisition module 3 is installed inside the frame, horizontally, and the horizontal length of the interface pipes at both ends of the flow acquisition module 3 is 2-3 times the length of the flow acquisition module 3.

[0047] When the dump truck is in the lifting state, the first turbine flow sensor 10 is working and the second turbine flow sensor 20 is not working; when the dump truck is in the lowering state, the first turbine flow sensor 10 is not working and the second turbine flow sensor 20 is working.

[0048] The device also includes a display module 5; the control module 4 is communicatively connected to the display module 5; the display module 5 is used to display the working status and lifting height of the lifting module 8.

[0049] The device also includes an alarm device 6; the alarm device 6 is used to play the working status of the lifting module 8.

[0050] The device also includes a gear pump 1 and a hydraulic oil tank 9; both the gear pump 1 and the hydraulic oil tank 9 are connected to the pneumatically controlled directional valve 2.

[0051] The device also includes a relief valve 0, which is connected between the gear pump 1 and the pneumatic directional valve 2. The relief valve 0 is used to control the pressure of the hydraulic oil.

[0052] During the lifting process, the power take-off (PTO) switch is activated, and the PTO on the transmission transmits engine power to gear pump 1. Gear pump 1 pressurizes the hydraulic oil in hydraulic oil tank 9 and sends it to pneumatically controlled directional valve 2. The driver controls pneumatically controlled directional valve 2 by operating the hand control valve 7 in the cab, allowing high-pressure oil to enter port A of flow acquisition module 3 through pneumatically controlled directional valve 2. Flow acquisition module 3 has two sets of check valves. The second set of check valves allows high-pressure oil to flow from port B to port A, and the first set of check valves allows high-pressure oil to flow from port A to port B. High-pressure oil enters port A through the first check valve 11 and then the first turbine flow sensor 10, and then through the second check valve 12 to port B. High-pressure oil first enters port B through the fourth check valve 22 and then the second turbine flow sensor 20. Because the pressure is high near port A at the third check valve 21, high-pressure oil cannot flow into port A through the third check valve 21. High-pressure oil can only flow out from port B and enter the lifting cylinder of lifting module 8 to achieve the lifting function. At this time, as high-pressure oil continuously enters the lifting cylinder, when the lifting height reaches a certain angle, that is, when the highest point is reached, the lifting module 8 will continuously return hydraulic oil to the hydraulic oil tank 9 through the limit valve. At this time, the cylinder volume of the maximum lifting height is represented by the instrument limit value.

[0053] During the "intermediate stop" process, the driver controls the pneumatic directional valve 2 by operating the manual control valve 7 to prevent high-pressure oil from flowing into port A. The high-pressure oil from the gear pump 1 flows directly back to the hydraulic oil tank 9 through the pneumatic directional valve 2. The high-pressure oil cannot enter port A, and the amount of hydraulic oil in the lifting cylinder remains unchanged, thus achieving the "intermediate stop" state during the lifting process.

[0054] During the "lowering" process, the driver controls the pneumatic directional valve 2 via the manual control valve 7. This allows the high-pressure oil from the gear pump 1 to flow directly back to the hydraulic oil tank 9 through the pneumatic directional valve 2. The oil flowing from the lifting module 8 flows through port A into the pneumatic directional valve 2 and finally into the hydraulic oil tank 9. The hydraulic oil flowing from the lifting module 8 enters the fourth check valve 22 through port B, passes through the second turbine flow sensor 20, enters the third check valve 21, and then flows out through port A through the pneumatic directional valve 2 into the hydraulic oil tank 9. During the "lowering" process, the hydraulic oil pressure in the lifting cylinder is higher than at port A, therefore the hydraulic oil will not flow from port A through check valve 11 into the second turbine flow sensor 10, thus achieving the "lowering" function.

[0055] When setting the highest lifting point, the hydraulic oil volume V in the lifting cylinder is... max ; 0 < V t ≤V max ;where V t Let t be the sum of the first and second fuel quantity information at time t, where the first fuel quantity information is a positive value and the second fuel quantity information is a negative value.

[0056] When V t -V t-1 When the value is greater than 0, the working status is "lifting", and the display module 5 displays the lifting height H. t ;where V t-1 The value is the sum of the first and second oil quantity information at time t-1; alarm module 6 displays a "lifting" message. At this time, hydraulic oil continuously enters the lifting cylinder in lifting module 8, and the lifting action continues. Cab display module 5 displays H. t =f(V t The alarm module 6 issues a "lifting in progress" voice prompt. When V t >V max At this time, hydraulic oil continuously enters the lifting cylinder and simultaneously flows out of the lifting cylinder through the limit valve inside the lifting cylinder, flowing back to the hydraulic oil tank 9. When the lifting reaches its highest position, the cab display module 5 displays "H". t =f(V t ), where V t =V max .

[0057] When V t =V t-1 At this time, the working status is "stopped"; display module 5 displays the lifting height H. t The alarm device issued a "Stopped" voice prompt.

[0058] When V t -V t-1 When the height is less than 0, the working status is "lowering", and the display module 5 displays the lifting height H. t The alarm device issued a voice prompt saying "Descending".

[0059] Hydraulic lifting methods for dump trucks on the market are generally divided into front-mounted hydraulic tops, dual-cylinder hydraulic center tops, and single-cylinder hydraulic center tops. One of the differences lies in the principle of limiting the maximum lifting height. For the first two types, the lifting height limit valve is located on the oil pipe before the chassis enters the lifting cylinder. When the truck reaches its highest point, the limit valve blocks high-pressure oil from flowing into the lifting cylinder and directs it back to the oil tank. For single-cylinder hydraulic center tops, the limit valve is inside the lifting cylinder. When the truck reaches its highest point, high-pressure oil flows back to the oil tank from the limit valve inside the lifting cylinder through a separate oil pipe. For single-cylinder hydraulic center top models, a turbine flow sensor output limit value needs to be set, with the maximum value being the maximum volume of the lifting cylinder. The lifting height is calculated by monitoring the flow rate into the lifting cylinder. This invention can be used for vehicles with common lifting methods on the market.

[0060] Embodiment 1 of the present invention proposes a dump truck lifting alarm monitoring device, which, compared with existing dump truck lifting alarm devices, can be applied to a variety of complex working conditions, has high reliability, and has the function of real-time and accurate feedback of lifting height.

[0061] Embodiment 1 of the present invention proposes a dump truck lifting alarm monitoring device, which enables the driver to accurately monitor and control the lifting height in the cab during the lifting or lowering process of the dump truck, and issues specific alarm prompts according to different lifting behaviors.

[0062] Example 2

[0063] Based on the dump truck lifting alarm monitoring device proposed in Embodiment 1 of the present invention, Embodiment 2 of the present invention also proposes a dump truck lifting height control method, which specifically includes:

[0064] The flow acquisition module 3 monitors in real time the first oil volume flowing into the lifting cylinder and the second oil volume flowing out of the lifting cylinder;

[0065] The control module 4 establishes a connection with the flow acquisition module 3 to obtain the first oil volume information and the second oil volume information. Based on the first oil volume information L1 and the second oil volume information L2, the change in the hydraulic oil volume V in the lifting cylinder is determined. The lifting height and working status of the dump truck are judged by the change in hydraulic oil volume.

[0066] The method also includes setting the hydraulic oil volume V in the lifting cylinder at the highest lifting point. max ; 0 < V t ≤V max ;where V t Let t be the sum of the first and second fuel quantity information at time t, where the first fuel quantity information is a positive value and the second fuel quantity information is a negative value.

[0067] like Figure 4 This is a flowchart of the control signal processing in a dump truck lifting height control method proposed in Embodiment 2 of the present invention;

[0068] When V t -V t-1 When the value is greater than 0, the working status is "lifting", and the display module 5 displays the lifting height H. t ;where V t-1 The value is the sum of the first and second oil quantity information at time t-1; alarm module 6 displays a "lifting" message. At this time, hydraulic oil continuously enters the lifting cylinder in lifting module 8, and the lifting action continues. Cab display module 5 displays H. t =f(V t The alarm module 6 issues a "lifting in progress" voice prompt. When V t >V max At this time, hydraulic oil continuously enters the lifting cylinder and simultaneously flows out of the lifting cylinder through the limit valve inside the lifting cylinder, flowing back to the hydraulic oil tank 9. When the lifting reaches its highest position, the cab display module 5 displays "H". t =f(V t ), where V t =V max .

[0069] When V t =V t-1 At this time, the working status is "stopped"; display module 5 displays the lifting height H. t The alarm device issued a "Stopped" voice prompt.

[0070] When V t -V t-1 When the height is less than 0, the working status is "lowering", and the display module 5 displays the lifting height H. t The alarm device issued a voice prompt saying "Descending".

[0071] The method for controlling the lifting height of a dump truck provided in Embodiment 2 of this application is based on a detailed description of the corresponding part of the dump truck lifting alarm monitoring device provided in Embodiment 1 of this application, which will not be repeated here.

[0072] The present application provides a method for controlling the lifting height of a dump truck in embodiment 2, which enables the driver to accurately monitor and control the lifting height in the cab during the lifting or lowering process of the dump truck, and to issue specific alarm prompts according to different lifting behaviors.

[0073] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that the elements inherent in a process, method, article, or apparatus that includes a list of elements are included. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element. Additionally, portions of the technical solutions provided in the embodiments of this application that are consistent with the implementation principles of corresponding technical solutions in the prior art have not been described in detail to avoid excessive elaboration.

[0074] While specific embodiments of the present invention have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of the present invention. Those skilled in the art can make other modifications or variations based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solutions of the present invention are still within the scope of protection of the present invention.

Claims

1. A dump truck lifting alarm monitoring device, characterized in that, It includes a control module (4), a flow acquisition module (3), a pneumatic reversing valve (2), and a lifting module (8); The pneumatic reversing valve (2) is connected to the inlet of the flow acquisition module (3); the lifting module (8) is connected to the outlet of the flow acquisition module (3); The flow acquisition module (3) is used to monitor in real time the first oil quantity information flowing from the pneumatic reversing valve (2) into the lifting cylinder through the inlet, and to monitor in real time the second oil quantity information flowing out of the lifting cylinder through the outlet; the lifting cylinder is located in the lifting module (8); the flow acquisition module (3) includes a first turbine flow sensor (10), a second turbine flow sensor (20), a first set of check valves and a second set of check valves; The first set of check valves includes a first check valve (11) and a second check valve (12); the second set of check valves includes a third check valve (21) and a fourth check valve (22); The first turbine flow sensor (10) is located between the first check valve (11) and the second check valve (12); the second turbine flow sensor (20) is located between the third check valve (21) and the fourth check valve (22); and both the first turbine flow sensor (10) and the second turbine flow sensor (20) are connected to the control module (4). When the dump truck is in the lifting state, the first turbine flow sensor (10) is working and the second turbine flow sensor (20) is not working; when the dump truck is in the lowering state, the first turbine flow sensor (10) is not working and the second turbine flow sensor (20) is working. The device also includes a display module (5); the control module (4) is communicatively connected to the display module (5); the display module (5) is used to display the working status and lifting height of the lifting module (8); The device also includes an alarm device (6); the alarm device (6) is used to play the working status of the lifting module (8); The control module (4) is connected to the flow acquisition module (3) to acquire the first oil volume information and the second oil volume information, and to determine the change in hydraulic oil volume in the lifting cylinder based on the first oil volume information and the second oil volume information, and to determine the lifting height and working status of the dump truck through the change in hydraulic oil volume.

2. The dump truck lifting alarm monitoring device according to claim 1, characterized in that, The device also includes a gear pump (1) and a hydraulic oil tank (9); both the gear pump (1) and the hydraulic oil tank (9) are connected to the pneumatically controlled directional valve (2); During the lifting process, the power take-off switch is turned on, and the power take-off on the gearbox transmits the engine power to the gear pump (1). The gear pump (1) pressurizes the hydraulic oil in the hydraulic oil tank (9) and sends it to the pneumatic control directional valve (2).

3. The dump truck lifting alarm monitoring device according to claim 1, characterized in that, The flow acquisition module (3) is installed inside the frame, horizontally, and the horizontal length of the interface pipes at both ends of the flow acquisition module (3) is 2-3 times the length of the flow acquisition module (3).

4. A method for controlling the lifting height of a dump truck, implemented based on a dump truck lifting alarm monitoring device as described in any one of claims 1 to 3, characterized in that, Includes the following steps: The flow acquisition module (3) monitors in real time the first oil volume information flowing into the lifting cylinder and the second oil volume information flowing out of the lifting cylinder; The control module (4) establishes a connection with the flow acquisition module (3) to obtain the first oil volume information and the second oil volume information, and determines the change in hydraulic oil volume in the lifting cylinder based on the first oil volume information and the second oil volume information. The lifting height and working status of the dump truck are judged by the change in hydraulic oil volume.

5. The method for controlling the lifting height of a dump truck according to claim 4, characterized in that, The method also includes setting the hydraulic oil volume V in the lifting cylinder at the highest lifting point. max ; 0 < V t ≤V max ;where V t Let t be the sum of the first and second fuel quantity information at time t, where the first fuel quantity information is a positive value and the second fuel quantity information is a negative value.

6. The method for controlling the lifting height of a dump truck according to claim 5, characterized in that, The method further includes: When V t -V t-1 When the height is greater than 0, the working status is "lifting", and the display module (5) displays the lifting height H. t ;where V t-1 It is the sum of the first and second oil quantity information at time t-1; When V t =V t-1 At this time, the working status is "stopped"; the display module (5) displays the lifting height H. t ; When V t -V t-1 When the height is <0, the working status is "lowering", and the display module (5) displays the lifting height H. t .

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