Dumper vehicle-mounted weighing device and dumper

Abstract

The utility model provides a dumper vehicle-mounted weighing device and a dumper, the dumper vehicle-mounted weighing device is used for the dumper, and the dumper comprises a container and a frame. The dumper-mounted weighing device comprises a pin shaft, the pin shaft is used for being hinged to the tail of a container and a frame, the pin shaft comprises a groove and a mounting cavity, the groove is annularly formed in the outer wall of the pin shaft, and an opening of the mounting cavity is formed in the end face of the pin shaft; the sensor is arranged on the inner wall, corresponding to the groove, of the mounting cavity, and the groove is formed in the joint of the tail and the frame. The groove and the mounting cavity are formed in the pin shaft, so that the pin shaft sensor is easy to mount, mounting of the pin shaft sensor can be achieved without professionals, meanwhile, due to the fact that the pin shaft is improved, customization is not needed, and only the pin shaft of a vehicle needs to be detached for simple machining; and the original pin shaft can be detached from any dumper for improvement, so that the adaptability of the weighing device is greatly improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of vehicle-mounted weighing, in particular to a vehicle-mounted weighing device for a dump truck and the dump truck. BACKGROUND

[0002] The dump truck mainly works in a mining area, a suburban construction site or between the city and the suburban construction area, and is used for transporting earthwork materials such as minerals, soil, sand, and construction waste. Due to the need for city management and road safety, various traffic regulations have increasingly strict requirements for the total mass of the dump truck when driving on the road. Therefore, the total mass of the dump truck during operation often needs to be weighed. However, the conventional vehicle-mounted weighing system can only be installed and debugged by professional technical personnel from the equipment manufacturer. The pin shaft sensor can only be purchased from the supplier and can only be customized according to the vehicle model. The working conditions of the dump truck are harsh, and there is a lot of mud and oil. The joints of the sensor are easily damaged, resulting in signal abnormalities.

[0003] Therefore, how to propose a dump truck vehicle-mounted weighing device that can effectively reduce the installation difficulty of the weighing device, improve the applicability of the weighing device, and reduce the damage rate of the sensor joint has become a problem to be solved at present. SUMMARY

[0004] The present application provides a dump truck vehicle-mounted weighing device and a dump truck, which solves the problem of high installation difficulty of the dump truck vehicle-mounted weighing device in the related art, which can only be installed by specialized technical personnel from the equipment manufacturer and needs to be customized according to the vehicle model, low applicability, and easy damage of the joints of the weighing device.

[0005] Therefore, the first purpose of the utility model is to provide a dump truck vehicle-mounted weighing device.

[0006] The second purpose of the utility model is to provide a dump truck.

[0007] Therefore, the first aspect of the utility model provides a dump truck vehicle-mounted weighing device, which is used for a dump truck and includes a cargo box and a vehicle frame. The dump truck vehicle-mounted weighing device includes a pin shaft, which is used for hinging the tail of the cargo box and the vehicle frame. The pin shaft includes a groove and a mounting cavity. The groove is circumferentially arranged on the outer wall of the pin shaft, and the opening of the mounting cavity is arranged on the end face of the pin shaft. At least one sensor is arranged on the inner wall of the mounting cavity corresponding to the groove. The groove is arranged at the connection between the tail and the vehicle frame.

[0008] In the technical scheme, the self-unloading vehicle on-board weighing device is used for a self-unloading vehicle, comprising a cargo box and a vehicle frame. The self-unloading vehicle on-board weighing device comprises a pin shaft, the pin shaft is used for hingedly connecting the tail of the cargo box and the vehicle frame, the pin shaft comprises a groove and a mounting cavity, the groove is circumferentially arranged on the outer wall of the pin shaft, and the opening of the mounting cavity is arranged on the end face of the pin shaft; and at least one sensor is arranged on the inner wall of the mounting cavity corresponding to the groove. In the application, the groove and the mounting cavity are arranged on the pin shaft, so that the installation of the pin shaft sensor is simple, and the installation of the pin shaft sensor can be realized without professional installation. Since the pin shaft is improved, the pin shaft of the vehicle only needs to be disassembled and simply processed, and the original pin shaft of any self-unloading vehicle can be disassembled and improved, so that the applicability of the weighing device is greatly improved. In the application, the sensor is arranged in the mounting cavity in the pin shaft, so that the joint of the sensor is safer, and the problem of signal abnormality caused by damage of the sensor joint is reduced.

[0009] Further, the depth of the groove is 2mm (millimeter), which can improve the strength of the pin shaft as much as possible, and the depth of the groove is 20mm, which can improve the detection precision. Meanwhile, the diameter of the mounting cavity is 15mm to 20mm, the diameter of the mounting cavity is reduced as much as possible under the condition that the sensor can be installed in the mounting cavity, so as to ensure the strength of the pin shaft, and the depth of the mounting cavity is greater than the distance from the opening of the mounting cavity to one side of the groove by at least 20mm, so that the sensor in the mounting cavity has a certain gap.

[0010] In some technical schemes, optionally, the number of sensors is two, and the two sensors are symmetrically arranged along the axis of the pin shaft.

[0011] In the technical scheme, the number of sensors is two, and the two sensors are symmetrically arranged along the axis of the pin shaft. By arranging two sensors symmetrically along the axis of the pin shaft in the mounting cavity in the pin shaft, the stress condition of the pin shaft can be better sensed, and the weight of the vehicle can be more accurately judged.

[0012] In some technical schemes, optionally, one of the two sensors is arranged on the side close to the front of the self-unloading vehicle, and the other of the two sensors is arranged on the side close to the tail of the self-unloading vehicle.

[0013] In the technical scheme, in actual use, the pin shaft is subjected to downward shearing force, and thus one of the two sensors is arranged on the side close to the front of the dump truck, and the other of the two sensors is arranged on the side close to the rear of the dump truck, so that the two sensors can be subjected to the same force, and the accuracy of the detected vehicle weight is further improved. In fact, the detection accuracy required by the dump truck is not particularly high, and the weight error measured by the pin shaft sensor of the application is within 1.5%, which can meet the requirement of measuring the vehicle load.

[0014] In some technical schemes, the sensor comprises a shearing strain sensor.

[0015] In the technical scheme, the sensor comprises a shearing strain sensor. Since the pin shaft is subjected to shearing force from the vehicle compartment during weighing, a certain deformation occurs, and the sensor arranged in the pin shaft can feel the deformation of the pin shaft, and thus the shearing force from the pin shaft to the sensor. By arranging the shearing strain sensor (i.e. shearing strain gauge), the shearing force of the pin shaft can be detected, and the load of the vehicle can be determined by the shearing force.

[0016] In some technical schemes, the center points of the shearing strain sensors are connected, so that the two shearing strain sensors form a Wheatstone full bridge.

[0017] In the technical scheme, the center points of the shearing strain sensors are connected, so that one shearing strain sensor exists as two resistors, and thus a Wheatstone full bridge circuit is formed. The stress change of the pin shaft can be detected by the Wheatstone full bridge circuit, and the load of the vehicle can be calculated.

[0018] In some technical schemes, the distance from the opening of the mounting cavity to the center line of the shearing strain sensor is equal to the distance from the opening of the mounting cavity to the position where the pin shaft contacts the frame.

[0019] In the technical scheme, the distance from the opening of the mounting cavity to the center line of the shearing strain sensor is equal to the distance from the opening of the mounting cavity to the position where the pin shaft contacts the frame. Since the pin shaft is used to fix the cargo box and the frame, it will contact the cargo box and the frame. When the connecting structure of the cargo box is closer to the outer side, one side of the groove coincides with the outer side of the connecting structure of the cargo box, that is, the intersection of the stress position and the non-stress position of the pin shaft, and the groove extends outward, so that the inspection accuracy of the sensor inside the pin shaft is improved.

[0020] In some embodiments, the on-board weighing device of the dump truck further comprises: a data acquisition device connected with the sensor, arranged in the mounting cavity, for acquiring the resistance value of the sensor; a wireless communication device connected with the data acquisition device, arranged in the mounting cavity, for broadcasting the resistance value of the data acquisition device; and a rechargeable battery connected with the sensor, for charging the sensor, and connected with the data acquisition device, for charging the data acquisition device.

[0021] In this embodiment, the on-board weighing device of the dump truck further comprises: a data acquisition device connected with the sensor, arranged in the mounting cavity, for acquiring the resistance value of the sensor; a wireless communication device connected with the data acquisition device, arranged in the mounting cavity, for broadcasting the resistance value of the data acquisition device; and a rechargeable battery connected with the sensor, the data acquisition device and the wireless communication device, capable of powering the rechargeable battery, the sensor, the data acquisition device and the wireless communication device, and capable of charging the rechargeable battery, so that the on-board weighing device of the dump truck can be charged for long-term use.

[0022] In some embodiments, the on-board weighing device of the dump truck further comprises: a processor for receiving the signal of the wireless communication device and processing the resistance value acquired by the data acquisition device to obtain the load of the dump truck.

[0023] In this embodiment, the on-board weighing device of the dump truck further comprises: a processor capable of receiving the signal of the wireless communication device and processing the resistance value acquired by the data acquisition device to obtain the load of the dump truck. The data acquisition device can be arranged in the mounting cavity, and the mounting cavity can be sealed at the opening after the sensor and the data acquisition device are installed, thereby preventing mud and oil stains from flowing into the mounting cavity and reducing the influence of mud and oil stains on the sensor.

[0024] In some embodiments, the on-board weighing device of the dump truck further comprises: a hydraulic pressure sensor arranged on the lifting cylinder of the dump truck, for detecting the oil pressure of the lifting cylinder, and connected with the data acquisition device; the data acquisition device is further used for acquiring the pressure value of the hydraulic pressure sensor; and the processor is further used for obtaining the load of the dump truck based on the pressure value.

[0025] In this embodiment, the on-board weighing device of the dump truck further comprises: a hydraulic pressure sensor arranged on the lifting cylinder of the dump truck, for detecting the oil pressure of the lifting cylinder, and connected with the data acquisition device; the data acquisition device is further used for acquiring the pressure value of the hydraulic pressure sensor; and the processor is further used for obtaining the load of the dump truck based on the pressure value. By arranging the hydraulic pressure sensor, the force acting on the lifting cylinder can be detected, and the three-point balance method can be used to weigh the load of the container based on the data of the lifting cylinder and the two pins.

[0026] Further, the self-unloading vehicle on-board weighing device further comprises a display and a wifi module, the display can display and control the use state of the self-unloading vehicle weighing module, and the wifi module can connect the self-unloading vehicle on-board weighing device to a mobile terminal such as a mobile phone, and the self-unloading vehicle on-board weighing device can be controlled through the mobile terminal.

[0027] According to the second aspect of the utility model, a self-unloading vehicle is further provided, which comprises: a container, a vehicle frame and the self-unloading vehicle on-board weighing device according to any one of the above technical solutions.

[0028] In the technical scheme, the self-unloading vehicle comprises: a container, a vehicle frame and the self-unloading vehicle on-board weighing device according to the first aspect, so that all the technical effects of the self-unloading vehicle on-board weighing device according to the first aspect are achieved.

[0029] The additional aspects and advantages of the utility model will become apparent in the following description section or be understood through the practice of the utility model. BRIEF DESCRIPTION OF DRAWINGS

[0030] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or related technologies, the drawings needed to be used in the following embodiment or related technology description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained according to the structures shown in these drawings without creative labor for those skilled in the art.

[0031] Figure 1 is a schematic view of the self-unloading vehicle on-board weighing device of an embodiment provided by the utility model;

[0032] Figure 2 is a schematic view of the pin shaft of an embodiment provided by the utility model;

[0033] Figure 3 is a schematic view of the OBD weighing controller wireless module of an embodiment provided by the utility model.

[0034] In the technical scheme, Figures 1 to 3 The correspondence between the reference signs and the component names in the drawings is as follows:

[0035] 1 container, 2 vehicle frame, 3 pin shaft, 30 groove, 32 installation cavity, 4 sensor, 40 shear strain sensor, 5 data acquisition device, 6 processor, 7 hydraulic pressure sensor, 8 lifting oil cylinder, 9 self-unloading vehicle, 10 self-unloading vehicle on-board weighing device, 11 wireless communication device, 12 rechargeable battery, 13 OBD weighing controller wireless module. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the utility model.

[0037] The embodiment of the utility model provides a kind of self-unloading vehicle on-board weighing device 10, as shown in Figure 1 And Figure 2 As shown, for self-unloading vehicle 9, including: container 1 and frame 2.Self-unloading vehicle on-board weighing device 10 includes pin shaft 3, pin shaft 3 is used to articulate the tail of container 1 and frame 2, pin shaft 3 includes recess 30 and installation cavity 32, recess 30 is circumferentially arranged on the outer wall of pin shaft 3, and the opening of installation cavity 32 is arranged on the end face of pin shaft 3;At least one sensor 4 is arranged on the inner wall of the installation cavity 32 corresponding to the recess, and the recess is arranged at the connection between the tail and the frame.

[0038] In the embodiment, self-unloading vehicle on-board weighing device 10 is used for self-unloading vehicle 9, including: container 1 and frame 2.Self-unloading vehicle on-board weighing device 10 includes pin shaft 3, pin shaft 3 is used to articulate the tail of container 1 and frame 2, pin shaft 3 includes recess 30 and installation cavity 32, recess 30 is circumferentially arranged on the outer wall of pin shaft 3, and the opening of installation cavity 32 is arranged on the end face of pin shaft 3;At least one sensor 4 is arranged on the inner wall of the installation cavity 32 corresponding to the recess, and the recess is arranged at the connection between the tail and the frame.In the present application, recess 30 and installation cavity 32 are arranged on pin shaft 3, so that the installation of pin shaft sensor 4 is simple, and the installation of pin shaft sensor 4 can be realized without professional installation, and since the pin shaft 3 is improved, it is not necessary to customize, and only the pin shaft 3 of the vehicle needs to be disassembled and simply processed, so that the original pin shaft 3 of any self-unloading vehicle 9 can be disassembled and improved, greatly improving the applicability of the weighing device.In the present application, sensor 4 is arranged in installation cavity 32 in pin shaft 3, so that the joint of sensor 4 is safer, and the problem of signal anomaly caused by damage of sensor 4 joint is reduced.

[0039] Further, the depth of recess 30 is 2mm (millimeter), which can improve the strength of pin shaft 3 as much as possible, and the depth of recess 30 is 20mm, which can improve the detection accuracy.Meanwhile, the diameter of installation cavity 32 is directly 15mm to 20mm, which can reduce the diameter of installation cavity 32 as much as possible under the condition that sensor 4 can be installed in installation cavity 32, so as to ensure the strength of pin shaft 3, and the depth of installation cavity 32 needs to be greater than the distance from the opening of installation cavity 32 to one side of recess 30 by at least 20mm, so as to provide a certain gap for sensor 4 in installation cavity 32.

[0040] In some embodiments, optionally, the number of sensors 4 is two, and the two sensors 4 are symmetrically arranged along the axis of the pin shaft 3.

[0041] In this embodiment, the number of sensors 4 is two, and the two sensors 4 are symmetrically arranged along the axis of the pin shaft 3. By arranging two sensors 4 symmetrically along the axis of the pin shaft 3 in the mounting cavity 32 inside the pin shaft 3, the stress condition of the pin shaft 3 can be better sensed, and the weight of the vehicle can be more accurately determined.

[0042] In some embodiments, optionally, one of the two sensors 4 is arranged near the front of the dump truck 9, and the other of the two sensors 4 is arranged near the rear of the dump truck 9.

[0043] In this embodiment, in actual use, the pin shaft 3 is subjected to downward shear force, so one of the two sensors 4 is arranged near the front of the dump truck 9, and the other of the two sensors 4 is arranged near the rear of the dump truck 9, so that the two sensors 4 can be subjected to the same force, further improving the accuracy of the detected vehicle weight. In fact, the detection accuracy required for the dump truck 9 is not particularly high, and the weight error measured by the pin shaft sensor 4 of the present application is within 1.5%, which can meet the measurement requirements of the vehicle load.

[0044] In some embodiments, optionally, the sensor 4 comprises a shear strain sensor 40.

[0045] In this embodiment, the sensor 4 comprises a shear strain sensor 40. Since the pin shaft 3 will be subjected to shear force from the vehicle during weighing, it will deform to a certain extent. The sensor 4 arranged in the pin shaft 3 will feel the deformation of the pin shaft 3, and then be subjected to the shear force from the pin shaft 3 to the sensor 4. By arranging the shear strain sensor 40 (i.e. shear strain gauge), the shear force received by the pin shaft 3 can be detected, and then the load of the vehicle can be determined through the shear force.

[0046] In some embodiments, optionally, the center points of the shear strain sensors 40 are connected, so that the two shear strain sensors 40 form a Wheatstone full bridge.

[0047] In this embodiment, by connecting the center points of the shear strain sensors 40, one shear strain sensor 40 exists as two resistors, and then a Wheatstone full bridge circuit is formed. Through the Wheatstone full bridge circuit, the stress change of the pin shaft 3 can be detected, and then the load of the vehicle can be calculated.

[0048] In some embodiments, optionally, the distance a from the opening of the mounting cavity 32 to the center line of the shear strain sensor 40 is equal to the distance b from the opening of the mounting cavity 32 to the position where the pin shaft 3 contacts the frame 2.

[0049] In this embodiment, the distance from the opening of the mounting cavity 32 to the center line of the shear strain sensor 40 is equal to the distance from the opening of the mounting cavity 32 to the position where the pin shaft 3 contacts the frame 2. Since the pin shaft 3 is used to fix the container 1 and the frame 2, it will contact the container 1 and the frame. When the connecting structure of the container 1 is closer to the outer side, one side of the groove 30 coincides with the outer side of the connecting structure of the container 1, that is, the intersection of the force position and the non-force position of the pin shaft 3, and the groove 30 extends outward, which can improve the inspection accuracy of the sensor 4 inside the pin shaft 3.

[0050] In some embodiments, optionally, the dump truck on-board weighing device 10 further comprises a data acquisition device connected with the sensor and arranged in the mounting cavity, for acquiring the resistance value of the sensor; a wireless communication device 11 connected with the data acquisition device and arranged in the mounting cavity, for broadcasting the resistance value of the data acquisition device; a groove arranged at the connection between the tail and the frame; a rechargeable battery 12 connected with the sensor, for charging the sensor; the rechargeable battery 12 is also connected with the data acquisition device, for charging the data acquisition device; the rechargeable battery 12 is also connected with the wireless communication device 11, for charging the wireless communication device 11.

[0051] In this technical solution, the dump truck on-board weighing device 10 further comprises a data acquisition device connected with the sensor and arranged in the mounting cavity, for acquiring the resistance value of the sensor; a wireless communication device 11 connected with the data acquisition device and arranged in the mounting cavity, for broadcasting the resistance value of the data acquisition device; a groove arranged at the connection between the tail and the frame; a rechargeable battery 12 connected with the sensor, the data acquisition device and the wireless communication device 11, which can supply power to the rechargeable battery 12, the sensor, the data acquisition device and the wireless communication device 11, and the rechargeable battery 12 can be charged, so that the dump truck on-board weighing device 10 can be charged, thereby realizing long-term use.

[0052] In some embodiments, optionally, the dump truck on-board weighing device 10 further comprises a processor 6 for receiving the signal of the wireless communication device 11 and processing the resistance value acquired by the data acquisition device 5 to obtain the load of the dump truck 9.

[0053] In this embodiment, the self-unloading truck on-board weighing device 10 further comprises a processor 6 for receiving signals of the wireless communication device 11 and processing resistance values collected by the data collection device 5 to obtain the load of the self-unloading truck 9. The data collection device 5 can be arranged in the mounting cavity 32, which is behind the mounting sensor 4 and the data collection device 5. The opening of the mounting cavity 32 can be sealed to prevent mud and oil from flowing into the mounting cavity 32, thereby reducing the impact of mud and oil on the data collection device 5.

[0054] In some embodiments, the self-unloading truck on-board weighing device 10 further comprises a hydraulic pressure sensor 7 arranged on the lifting cylinder 8 of the self-unloading truck 9 for detecting the oil pressure of the lifting cylinder 8, and the hydraulic pressure sensor 7 is connected to the data collection device 5. The data collection device 5 is further configured to obtain the pressure value of the hydraulic pressure sensor 7. The processor 6 is further configured to obtain the load of the self-unloading truck 9 based on the pressure value.

[0055] In this embodiment, the self-unloading truck on-board weighing device 10 further comprises a hydraulic pressure sensor 7 arranged on the lifting cylinder 8 of the self-unloading truck 9 for detecting the oil pressure of the lifting cylinder 8, and the hydraulic pressure sensor 7 is connected to the data collection device 5. The data collection device 5 is further configured to obtain the pressure value of the hydraulic pressure sensor 7. The processor 6 is further configured to obtain the load of the self-unloading truck 9 based on the pressure value, and by arranging the hydraulic pressure sensor 7, the force acting on the lifting cylinder 8 is detected. By combining the data of the lifting cylinder 8 and the two pin shafts 3, the three-point balance method is used to weigh the mass of the container 1.

[0056] Further, the self-unloading truck on-board weighing device 10 further comprises a display and a wifi module. The display can display and control the usage state of the self-unloading truck 9 weighing module, and the wifi module can connect the self-unloading truck on-board weighing device 10 to a mobile terminal such as a mobile phone, so that the self-unloading truck 9 weighing device can be controlled through the mobile terminal.

[0057] 1) Pin shaft sensor 4 manufacturing: remove the turnover pin at the tail of the original truck container 1, mark the joint line of the two shaft seats on the outer surface of the pin shaft 3, and then machine a groove (i.e. groove 30) with a width of 20mm and a depth of 2mm from the joint line outward. Then a counterbore (i.e. mounting cavity 32) with a diameter of 15mm-20mm is machined from the outer end face, and the depth exceeds the joint surface by more than 20mm.

[0058] 2) Use hole polishing equipment to polish the inner surface of the counterbore to meet the surface roughness requirements for strain gauge adhesion.

[0059] 3) Draw a cross coordinate on the end face, the coordinate origin is the center point of the hole, the X axis is the horizontal axis in the state of the shaft installation, the positive direction is the vehicle forward direction; the Y axis is the vertical direction in the state of the shaft installation, the positive direction is vertically upward. Clean the inner hole surface with anhydrous ethanol or acetone, and after drying, paste shear strain gauges (i.e. shear strain sensors 40) on the two symmetrical inner surfaces in the X axis direction, the center line of the strain gauge is consistent with the depth of the bonding line. After the glue is completely cured and protected, combine the two strain gauges into a Wheatstone full bridge.

[0060] 4) Circuit combination of the Wheatstone bridge, AD module (data acquisition module), MCU (Microcontroller Unit, microcontroller), WIFI (Wireless Fidelity, a technology that allows electronic devices to connect to a wireless local area network) module, and rechargeable lithium battery, and then communication debugging through the serial port debugging assistant of the PC (Personal Computer) to ensure normal communication. The 2.4G antenna is connected to the WIFI module through the IPXE (Intnl Preboot Execution Environment, an open-source, extensible pre-boot execution environment) interface, and the combined circuit is loaded into the pin shaft hole. The external threaded end face is coated with sealant and the 2.4G antenna is fastened, completing the circuit assembly.

[0061] 5) Calibrate the pin shaft sensor 4 to obtain the correlation coefficient of the output signal and the load. Complete the pin shaft sensor 4 production.

[0062] 6) As shown in Figure 1 , park the vehicle empty on a level ground, remove the two turnover pins at the tail of the original vehicle cargo box 1. Load the two wireless pin shaft sensors 4 according to the assembly state of the original vehicle parts, respectively, and record the corresponding sensor numbers of the left and right sensors 4. The downward pointing arrow direction of the sensor 4 end face is approximately vertically downward in the final fastening state. Press the waterproof switches on the outside of the two sensor 4 connectors, respectively, to start the wireless pin shaft sensor 4.

[0063] 7) Loosen the oil pipe joint at the connection between the lifting oil cylinder 8 and the oil inlet pipe, connect a three-way pressure measuring joint between the oil cylinder oil inlet joint and the oil pipe joint, and tighten the three to prevent oil leakage. Connect the pressure sensor 4 to the pressure measuring joint and tighten it.

[0064] 8) Fix the sliding bracket on the base plate of the lifting oil cylinder 8, and install the proximity switch sensor on the sliding groove.

[0065] 9) Connect the proximity switch sensor to the designated IO (Input / Output Port, input / output interface) port of the wireless pressure sensor connector, and connect the two power lines of the pressure sensor 4 to the 12V storage battery.

[0066] 10) Start the vehicle, operate slowly to lift the cargo box 1 until the plane of the lowest part of the cargo box 1 tail is completely separated from the frame 2 and keep the oil cylinder stationary. Adjust the position of the proximity switch sensor to the lowest position where it outputs a high level sensing signal (the LED (Light Emitting Diode, Light Emitting Diode) indicator on the joint lights up), tighten the locking nut of the proximity switch, and complete the sensor 4 setting.

[0067] 11) Find the available OBD (On-Board Diagnostic, Vehicle-mounted Diagnostic System) interface on the instrument table in the cab, as shown in Figure 3 wirelessly connect the OBD weighing controller wireless module 13 to the wireless control terminal, and the OBD weighing controller wireless module 13 can be wirelessly connected to the wireless communication device 11 in the pin shaft 3. When the vehicle is powered on, each sensor 4 and the controller are wirelessly controlled by the control software, and the communication connection and weighing control are automatically completed.

[0068] 12) Initialization setting is required when first installed and used: park the vehicle on a horizontal ground - power on and start the vehicle - open the mobile phone end weighing APP - connect the hotspot WIFI of the vehicle weighing controller - click “initialization configuration” - when the interface pops up “initializing……”, slowly lift the cargo box 1 until the APP interface displays “initialization complete” - click “empty vehicle weight setting” on the APP interface - input the empty vehicle weight result measured on the weighbridge when empty. The entire initialization configuration is completed.

[0069] 13) Weighing and use: open the mobile phone end APP and connect the WIFI hotspot of the vehicle. When weighing is required, the parking brake is turned on or the brake pedal is stepped on to ensure that the vehicle is stationary, and the “weighing” icon on the APP interface is clicked. When “weighing……” is displayed, slowly lift the cargo box 1 until “weighing complete” is displayed to complete the weighing operation. When no weighing operation is performed, the system and the sensor 4 automatically enter a low-power sleep state to reduce the energy consumption of the built-in battery.

[0070] According to the second aspect of the utility model, a self-unloading vehicle 9 is also provided, comprising: a cargo box, a frame and a self-unloading vehicle on-board weighing device 10 according to any one of the above embodiments.

[0071] In this embodiment, the self-unloading vehicle 9 comprises: a cargo box, a frame and a self-unloading vehicle on-board weighing device 10 according to the first aspect, thus having all the technical effects of the self-unloading vehicle on-board weighing device 10 of the first aspect.

[0072] In addition, the description such as "first", "second" and the like in the present application is only for the purpose of description and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "multiple" is at least two, for example, two, three, etc., unless otherwise specifically limited.

[0073] In the present application, unless otherwise specifically defined and limited, the terms "connection", "fixing" and the like should be understood broadly, for example, "fixing" can be fixed connection, or detachable connection, or integral; can be mechanical connection, or electrical connection; can be directly connected, or indirectly connected through intermediate medium; can be the internal communication of two elements or the interaction relationship of two elements, unless otherwise specifically limited. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0074] In addition, the technical solutions of each embodiment of the present application can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor within the protection scope required by the present application.

[0075] The above is only the preferred embodiment of the present application and is not used to limit the present application. For ordinary skilled in the art, the present application can have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A truck-mounted weighing device for a self-unloading vehicle, characterized in that A self-unloading truck, comprising: a cargo box and a frame, and a truck-mounted weighing device, comprising: a pin shaft for hinging a tail of the cargo box and the frame, the pin shaft comprising a groove and a mounting cavity, the groove being circumferentially arranged on an outer wall of the pin shaft, and an opening of the mounting cavity being arranged on an end face of the pin shaft; at least one sensor arranged on an inner wall of the mounting cavity corresponding to the groove; the groove is arranged at a connection between the tail and the frame.

2. The on-board weighing device for a dump truck of claim 1, wherein, The number of the sensors is two, and the two sensors are symmetrically arranged along an axis of the pin shaft.

3. The on-board weighing device of a dump truck according to claim 2, characterized in that, One of the two sensors is arranged near a front of the self-unloading truck, and the other of the two sensors is arranged near a rear of the self-unloading truck.

4. The on-board weighing device of a dump truck according to claim 2, characterized in that, The sensor comprises a shear strain sensor.

5. The on-board weighing device of a dump truck according to claim 4, characterized in that, A center point of the shear strain sensor is connected, so that the two shear strain sensors form a Wheatstone full bridge.

6. The on-board weighing device of a dump truck according to claim 5, characterized in that, A distance from the opening of the mounting cavity to a center line of the shear strain sensor is equal to a distance from the opening of the mounting cavity to a position where the pin shaft contacts the frame.

7. The on-board weighing device of a dump truck according to any one of claims 1 to 6, characterized in that, Further comprising: a data acquisition device connected with the sensor and arranged in the mounting cavity, for acquiring a resistance value of the sensor; a wireless communication device connected with the data acquisition device and arranged in the mounting cavity, for broadcasting the resistance value of the data acquisition device; a rechargeable battery connected with the sensor, for charging the sensor; the rechargeable battery is also connected with the data acquisition device, for charging the data acquisition device; the rechargeable battery is also connected with the wireless communication device, for charging the wireless communication device.

8. The on-board weighing device of a dump truck according to claim 7, characterized in that, Further comprising: a processor for receiving a signal of the wireless communication device and processing the resistance value acquired by the data acquisition device to obtain a load of the self-unloading truck.

9. The on-board weighing device of a dump truck according to claim 8, characterized in that, Further comprising: a hydraulic pressure sensor arranged on a lifting cylinder of the self-unloading truck, for detecting an oil pressure of the lifting cylinder, the hydraulic pressure sensor being connected with the data acquisition device; the data acquisition device is also used for acquiring a pressure value of the hydraulic pressure sensor; the processor is also used for obtaining the load of the self-unloading truck based on the pressure value.

10. A dump truck characterized by Comprise: a cargo box and a frame; the truck-mounted weighing device according to any one of claims 1 to 9.

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