Detection device and test method for detecting carriage expansion performance of dump truck carriage

Abstract

The invention discloses a detection device and a test method for detecting the carriage expansion performance of a dump truck carriage. The detection device comprises at least one test device unit; the test device unit includes: a support member fixedly or movably provided; the front top plate assembly is arranged on the first side of the supporting component; the flexible pressure applying assembly is arranged on the side, away from the bottom supporting component, of the front top plate assembly; and the driving assembly is respectively connected with the supporting part and the front top plate assembly, the driving assembly drives the front top plate assembly to move towards the carriage side plate of the to-be-tested automobile carriage, and the flexible pressure applying assembly applies a test load to the carriage side plate. According to the detection device, the driving assembly is connected with the supporting part and the front top plate assembly to drive the front top plate assembly to move towards the side plate of the to-be-detected carriage, the flexible pressure applying assembly applies the test load, the situation that the side plate of the to-be-detected carriage is stressed during material transportation is simulated, and the carriage expansion performance of the automobile carriage can be effectively detected.

Description

Technical Field

[0001] The present application belongs to the technical field of dump truck performance testing, and in particular, relates to a testing device and a testing method for testing the expansion performance of a dump truck compartment. Background Art

[0002] With the continuous increase in investment in infrastructure construction, dump trucks have become the main means of transport for short- and medium-distance infrastructure materials. In recent years, the market demand for dump trucks has continued to grow. For the dump truck compartment structure, in addition to meeting certain steel strength requirements, the anti-expansion performance has always been a focus of attention for dump trucks. This is because after long-term use of dump trucks, due to the accumulation of fatigue damage in the compartment, the side panels of the compartment will undergo permanent deformation, which is the so-called expansion.

[0003] When the side panels of the car body expand, the dump truck will have the following two adverse effects during operation. On the one hand, as the side panels open outward, gaps appear between the left and right side panels of the car body and the rear door, making it impossible to lock them, causing materials to spill during transportation. On the other hand, after the expansion occurs, the slide groove of the sealed top cover on the upper part of the car body opens outward with the side panels, making it impossible to close the top cover. In the prior art, there is no suitable detection equipment and detection method for the expansion problem of dump trucks. Designers can only design based on their work experience and cannot verify whether the car body meets the requirements. Summary of the invention

[0004] The embodiment of the present application provides a detection device and a test method for detecting the expansion performance of a dump truck compartment, which can effectively detect the expansion performance of the dump truck compartment.

[0005] In the first aspect, the present application provides a detection device for detecting the expansion performance of a dump truck compartment, comprising: at least one test device unit; the test device unit comprises: a support component, which can be fixed or movably arranged; a front top plate assembly, which is arranged on a first side of the support component; a flexible pressure assembly, which is arranged on the side of the front top plate assembly away from the support component; a drive assembly, which is respectively connected to the support component and the front top plate assembly, the drive assembly drives the front top plate assembly to move toward the compartment side panel of the vehicle compartment to be tested, and the flexible pressure assembly applies a test load to the compartment side panel.

[0006] According to an embodiment of the first aspect of the present application, the front top plate assembly is rotatably connected to the support component, the driving assembly drives the front top plate assembly to rotate around the rotatable connection between the front top plate assembly and the support component, and moves toward the side panels of the vehicle compartment to be tested, and the test load is applied to the side panels by the flexible pressure assembly.

[0007] According to an embodiment of the first aspect of the present application, the supporting component includes: a frame, including at least three vertical rods, and horizontal rods arranged around the top and bottom of the vertical rods and vertically connected to the vertical rods; a connecting plate, arranged at the top of the frame, the connecting plate is connected to the driving assembly; a connecting pin, arranged on one side of the top of the frame, the connecting pin is connected to the front top plate assembly; a roller, arranged at the bottom of the frame, the roller is provided with a braking component.

[0008] According to an embodiment of the first aspect of the present application, the front top plate assembly includes: a front top frame, including longitudinal rods and transverse rods, the longitudinal rods and the transverse rods are vertically connected to each other along the same plane to form the front top frame; a front top plate, arranged on the side of the front top frame away from the supporting component; a connecting shaft, arranged on the side where the front top frame is connected to the supporting component; a connecting block, arranged on the upper part of the connecting shaft, and the connecting block is connected to the driving assembly.

[0009] According to an embodiment of the first aspect of the present application, the connecting pin of the supporting component is coaxially connected to the connecting shaft of the front roof assembly.

[0010] According to the embodiment of the first aspect of the present application, the flexible pressure component includes: more than two fluid sacs, which are arranged on the side of the front top plate assembly away from the supporting component; each fluid sac is composed of multiple independent fluid sacs, and the fluid sac is provided with a fluid inlet and outlet.

[0011] According to an embodiment of the first aspect of the present application, the fluid sacs are arranged in sequence from bottom to top along a side of the front top plate facing away from the supporting component.

[0012] According to an embodiment of the first aspect of the present application, the binding ropes fix the fluid bladder to a side of the front top plate assembly facing away from the support component.

[0013] According to the embodiment of the first aspect of the present application, the binding rope fixes the three-dimensional bag body to the side of the front top plate facing away from the supporting component.

[0014] According to an embodiment of the first aspect of the present application, the driving assembly includes a telescopic cylinder and a telescopic rod extended or retracted in the telescopic cylinder, the end of the telescopic cylinder away from the telescopic rod is connected to the supporting component, and the end of the telescopic rod away from the telescopic cylinder is connected to the front top plate assembly.

[0015] According to an embodiment of the first aspect of the present application, the telescopic cylinder is rotatably connected to the connecting plate of the supporting component, and the telescopic rod is rotatably connected to the connecting block of the front top plate assembly.

[0016] In a second aspect, the present application provides a test method for detecting the expansion performance of a dump truck compartment, comprising: placing a detection device for detecting the expansion performance of a dump truck compartment in a compartment of a vehicle to be tested, using the detection device for detecting the expansion performance of a dump truck compartment to apply 50% of a preset test load to a compartment side panel of the compartment of the vehicle to be tested, unloading the preset test load, and using the actual position of the compartment side panel after unloading 50% of the preset test load as a zero point for measuring the deformation of the compartment expansion performance;

[0017] Using a detection device for detecting the expansion performance of a dump truck compartment to apply a preset test load to the surface of the compartment side panel of the compartment to be tested, the time for applying the preset test load is a first duration;

[0018] After applying the preset test load, select the upper, middle and lower measuring points on the same vertical line in the height direction in the middle area of ​​the car body side panel in the length direction to measure the maximum value of the expansion; measure three times, and take the arithmetic mean of the maximum values ​​of the three measured expansion amounts as the deformation value of the dump truck car body expansion performance.

[0019] According to an embodiment of the second aspect of the present application, a preset test load applied to the surface of the side panel of the compartment to be tested by a detection device for detecting the expansion performance of the compartment of a dump truck is calculated according to the following formula (1):

[0020]

[0021] In formula (1),

[0022] P is the preset test load applied to the side panel of the carriage to be tested, unit: Pa;

[0023] ρ, density of the material transported in the carriage, unit: kg / m 3 ;

[0024] g, acceleration due to gravity, unit: m / s 2 ;

[0025] h, the vertical distance between the calculated position and the reference point of the side panel of the carriage. The reference point is the top of the same vertical line of the side panel of the carriage, unit: meter, m;

[0026] The friction angle between the material transported in the carriage and the side panel of the carriage to be tested, unit: degree (°).

[0027] According to an embodiment of the second aspect of the present application, the first duration of applying the preset test load is ≥5 minutes.

[0028] The embodiment of the present application is a testing device for testing the expansion performance of a dump truck compartment. The front top plate assembly, the flexible pressure assembly and the drive assembly in the test device unit are supported by a support component. The front top plate assembly is arranged on a first side of the support component and is connected to the support component. The drive assembly is respectively connected to the support component and the front top plate assembly, and the front top plate assembly is driven by the drive assembly to move toward the side panel of the compartment to be tested. The flexible pressure assembly arranged on the side of the front top plate assembly away from the support component applies a test load to the side panel of the compartment to be tested, thereby simulating the situation when the side panel of the compartment to be tested is subjected to pressure when transporting corresponding materials. This can effectively test the expansion performance of the dump truck compartment, and then assist designers in making corresponding improvements to the compartment design to meet actual requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solution of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0030] Figure 1 It is a schematic diagram of the detection device for detecting the expansion performance of a dump truck compartment provided in an embodiment of the present application being applied to the dump truck compartment to perform expansion performance detection.

[0031] Figure 2 It is a schematic diagram of the rear view structure of a dump truck compartment, in which a detection device for detecting the expansion performance of a dump truck compartment provided in an embodiment of the present application is applied.

[0032] Figure 3 yes Figure 2 An enlarged view of the local structure A in FIG.

[0033] Figure 4 The present invention is a schematic diagram of the structure of a detection device for detecting the expansion performance of a dump truck compartment.

[0034] Figure 5 It is a schematic diagram of the three-dimensional structure of the test device unit.

[0035] Figure 6 It is a left view structural diagram of the test device unit.

[0036] Figure 7 It is a structural schematic diagram of the supporting components.

[0037] Figure 8 It is a structural schematic diagram of the front top plate assembly.

[0038] Fig. 9 It is a structural schematic diagram of the flexible pressure component.

[0039] Fig.10 yes Fig. 9 An enlarged view of the local structure B in FIG.

[0040] Fig.11 It is a schematic diagram of applying a test load to the side panel of the dump truck compartment to be tested.

[0041] Fig.12 It is a schematic diagram of selecting the upper, middle and lower measuring points on the same vertical line L in the height direction in the middle area of ​​the car side panel after the preset test load is applied.

[0042] Description of reference numerals:

[0043] 1. Test device unit; 100. Support component; 101. Connecting plate; 102. Frame; 102a. Vertical rod; 102b. Horizontal rod; 103. Connecting pin; 104. Roller; 200. Driving assembly; 201. Telescopic cylinder; 202. Telescopic rod; 300. Front top plate assembly; 301. Front top plate; 302. Front top frame; 302a. Longitudinal rod; 302b. Transverse rod; 303. Connecting shaft; 304. Connecting block; 400. Flexible pressure assembly; 401. Fluid capsule; 400. Fluid 1. bag; 4010a, fluid inlet and outlet; 4011, tying rope; 2. detection device for detecting the expansion performance of the dump truck compartment; α, rotation angle between the telescopic cylinder and the supporting component; F, applied preset test load; L, vertical line; 501, upper measuring point; 502, middle measuring point; 503, lower measuring point; 3. dump truck compartment to be tested; 4, compartment side panel; D, reference reference point; D1, calculation position; h, vertical distance between the calculation position D1 and the reference reference point D of the compartment side panel; D0, zero point of deformation; D d , deformation point; D x , deformation point D d The distance difference between the deformation zero point D0. DETAILED DESCRIPTION

[0044] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present application, rather than to limit the present application. For those skilled in the art, the present application can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the present application by illustrating the examples of the present application.

[0045] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "include..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0046] In order to solve the problems of the prior art, the embodiment of the present application provides a detection device and a test method for detecting the expansion performance of a dump truck compartment. The following first introduces the detection device for detecting the expansion performance of a dump truck compartment provided by the embodiment of the present application.

[0047] Figure 4 The schematic diagram of the structure of a detection device for detecting the expansion performance of a dump truck compartment provided by an embodiment of the present application is shown. Figure 4 As shown, a detection device 2 for detecting the expansion performance of a dump truck compartment comprises: at least one test device unit 1; the test device unit 1 comprises: a support component 100, which can be fixed or movably arranged; a front top plate assembly 300, which is arranged on a first side of the support component 100; a flexible pressure assembly 400, which is arranged on a side of the front top plate assembly 300 away from the support component 100; a drive assembly 200, which is respectively connected to the support component 100 and the front top plate assembly 300, the drive assembly 200 drives the front top plate assembly 300 to move toward the compartment side panel 4 of the vehicle compartment 3 to be tested, and the flexible pressure assembly 400 applies a test load to the compartment side panel 4 of the vehicle compartment 3 to be tested.

[0048] In some embodiments of the present application, the front top plate assembly 300 is rotatably connected to the support component 100, and the driving assembly 200 drives the front top plate assembly 300 to rotate around the rotational connection between the front top plate assembly 300 and the support component 100, and moves toward the car side panel 4 of the car compartment 3 to be tested, and the flexible pressure assembly 400 applies a test load to the car side panel 4 of the car compartment 3 to be tested.

[0049] The embodiment of the present application is a detection device for detecting the expansion performance of a dump truck. The front top plate assembly, the flexible pressure assembly and the drive assembly in the test device unit are supported by a support component. The front top plate assembly is arranged on a first side of the support component and is connected to the support component. The drive assembly is respectively connected to the support component and the front top plate assembly, and the front top plate assembly is driven by the drive assembly to move toward the side panel of the compartment to be tested. The flexible pressure assembly arranged on the side of the front top plate assembly away from the support component applies a test load to the side panel of the compartment to be tested, thereby simulating the expansion of the compartment when the compartment to be tested is subjected to pressure when transporting corresponding materials. This can effectively detect the expansion performance of the dump truck, and then assist designers to make corresponding improvement designs to the compartment to meet actual requirements.

[0050] like Figure 4 As shown, the detection device for detecting the expansion performance of a dump truck compartment in the embodiment of the present application is composed of at least one test device unit 1, which can be freely combined according to the different lengths of the dump truck compartment, thereby expanding the versatility of the detection device.

[0051] In some embodiments of the present application, Figure 7 As shown, the support component 100 includes: a frame 102, including at least three vertical rods 102a, and horizontal rods 102b arranged around the top and bottom of the vertical rods 102a and vertically connected to the vertical rods 102a; a connecting plate 101, arranged at the top of the frame 102, and the connecting plate 101 is connected to the driving assembly 200; a connecting pin 103, arranged on one side of the top of the frame 102, and the connecting pin 103 is connected to the front top plate assembly 300; a roller 104, arranged at the bottom of the frame 102, and the roller 104 is provided with a braking component.

[0052] The embodiment of the present application is a detection device for detecting the expansion performance of a dump truck compartment. During the process of testing the expansion performance of the dump truck compartment, the detection device is placed in the compartment, and the roller 104 contacts the horizontal lateral bottom plate of the compartment, and can be freely moved in the compartment through the roller to move the detection device to the position where the expansion performance test is required. When the expansion performance test is performed, the roller is braked by the brake component, so that it has a locking function, so that the roller is in a brake state, ensuring that the detection device can be stably stationary inside the compartment. The roller 104 at the bottom of the support component 100 makes the detection device have good flexibility. The connecting pin 103 is used to coaxially rotate with the connecting shaft 303 in the front top plate assembly 300, that is, the connecting shaft 303 can be inserted into the connecting pin 103 to make the two coaxially rotate and connect; the connecting plate 101 is connected to the connecting block 304 in the front top plate assembly 300 through the drive assembly 200. Optionally, multiple rollers 104 can be provided.

[0053] In some embodiments of the present application, Figure 8As shown, the front top plate assembly 300 includes: a front top frame 302, including a longitudinal rod 302a and a transverse rod 302b, the longitudinal rod 302a and the transverse rod 302b are vertically connected to each other along the same plane to form the front top frame 302; a front top plate 301, arranged on the side of the front top frame 302 away from the supporting component 100; a connecting shaft 303, arranged on the side where the front top frame 302 is connected to the supporting component 100; a connecting block 304, arranged on the upper part of the connecting shaft 303, and the connecting block 304 is connected to the driving assembly 200.

[0054] In the embodiment of the present application, the front top plate assembly 300 can be rotated around the connecting shaft 303 to adjust the angle under the action of the driving assembly. After the expansion chamber performance test is completed, the driving assembly can be retracted to make the front top plate assembly 300 in a retracted state in a non-test state and stored on the support component.

[0055] In some embodiments of the present application, Figure 5 and Figure 8 As shown, the connecting pin 103 of the supporting component 100 is coaxially connected to the connecting shaft 303 of the front top plate assembly 300, so that under the drive of the driving assembly 200, the front top plate assembly 300 can rotate and unfold around the connecting shaft 303 to apply a test load to the side panel of the vehicle compartment to be tested.

[0056] In some embodiments of the present application, Fig. 9 and Fig.10 As shown, the flexible pressure component 400 includes: more than two fluid sacs 401, which are arranged on the side of the front top plate component 300 away from the support component 100; each fluid sac 401 includes a plurality of independent fluid sacs 4010, and the fluid sac 4010 is provided with a fluid inlet and outlet 4010a.

[0057] In an embodiment of the present application, when conducting a dump truck compartment expansion performance test, each fluid bag can be filled with fluids of different pressures, which come into contact with the compartment side panels of the dump truck compartment under the action of pressure and transmit the pressure to the compartment side panel plane. Optionally, the fluid bag can be filled with gas or liquid through the fluid inlet and outlet to obtain a certain pressure, thereby applying different test loads to the compartment side panels of the dump truck compartment. Exemplarily, the fluid bag 4010 can be filled with fluids such as air, water, or hydraulic oil. If an inflated fluid bag 4010 is used as a component in contact with the compartment side panel 4, it can fully contact with the compartment side panel 4 under pressure to apply the test load, and will not be affected by the shape of the compartment side panel.

[0058] In addition, if Figure 6 and Fig. 9As shown, the fluid sacs 401 are arranged in sequence from bottom to top along the side of the front top plate 301 away from the supporting component 100, and the fluid sacs 401 are divided into several independent fluid sacs 4010, which can realize different test loads on the surface of the side panels of the carriage according to the different pressures borne by the side panels of the carriage at different heights when transporting materials.

[0059] In some embodiments of the present application, the binding rope 4011 fixes the fluid sac 401 to the side of the front top plate assembly 300 away from the support component 100 , so that the fluid sac 401 can be fixed to the side of the front top plate 301 away from the support component 100 .

[0060] In some embodiments of the present application, Figure 5 and Figure 6 As shown, the driving assembly 200 includes a telescopic cylinder 201 and a telescopic rod 202 that extends out or is retracted in the telescopic cylinder 201 , the end of the telescopic cylinder 201 that is away from the telescopic rod 202 is connected to the supporting component 100 , and the end of the telescopic rod 202 that is away from the telescopic cylinder 201 is connected to the front top plate assembly 300 .

[0061] In an embodiment of the present application, the telescopic cylinder 201 can be an oil cylinder, an air cylinder or a hydraulic cylinder, so that the telescopic rod 202 can extend from the telescopic cylinder 201 or retract into the telescopic cylinder, thereby driving the front top plate assembly 300 to move toward the side panel of the vehicle compartment to be tested, and pushing the flexible pressure assembly 400 to apply the test load to the surface of the side panel of the vehicle compartment.

[0062] In some embodiments of the present application, Figure 5 and Figure 6 As shown, the telescopic cylinder 201 is rotatably connected to the connecting plate 101 of the supporting component 100, and the telescopic rod 202 is rotatably connected to the connecting block 304 of the front top plate assembly 300. When the telescopic rod 202 is extended from the telescopic cylinder 201, the driving assembly 200 can drive the front top plate assembly 300 to move toward the side plate of the vehicle compartment to be tested; or when the telescopic rod 202 is retracted into the telescopic cylinder 201, the driving assembly 200 can retract the front top plate assembly 300 onto the supporting component 100.

[0063] The detection device for detecting the expansion performance of the dump truck compartment of the present application can apply the same test load to the surface of the compartment side panel of the dump truck compartment to be tested, and can also apply different test loads to the surface of the compartment side panel from low to high, so as to effectively simulate the situation of the dump truck compartment when transporting materials, thereby effectively detecting the expansion performance of the dump truck side compartment.

[0064] In some embodiments of the present application, the rotation angle α between the telescopic cylinder 201 and the horizontal rod 102b of the connecting plate 101 set on the support component 100 is at least sufficient to make the front top plate assembly 300 and the horizontal plane where the horizontal rod 102b at the top of the support component 100 are located form a 90° dihedral angle, so as to support the front top plate assembly through the driving assembly, so that the flexible pressure component arranged on the side of the front top plate assembly away from the support component applies a load to the side wall side panel. Optionally, the plane formed by the front top plate assembly 300 and the transverse rod 102b at the top of the supporting component 100 forms a dihedral angle of >90°, so that the upper part of the front top plate assembly can apply a relatively large load to the side panels of the carriage, and the lower part of the front top plate assembly can apply a relatively small load to the side panels of the carriage; or the front top plate assembly 300 and the plane formed by the transverse rod 102b at the top of the supporting component 100 form a dihedral angle of <90°, so that the lower part of the front top plate assembly can apply a relatively large load to the side panels of the carriage, and the upper part of the front top plate assembly can apply a relatively small load to the side panels of the carriage, so as to simulate the influence of different materials on the expansion performance of the side panels of the carriage.

[0065] The present application provides a detection device for detecting the expansion performance of a dump truck compartment, such as Figure 1 As shown, the length of the dump truck compartment to be tested can be different, such as Figure 4 As shown, multiple test device units can be freely combined. Figure 1-3 As shown, when conducting a dump truck compartment expansion performance test, a detection device for detecting the dump truck compartment expansion performance is placed in the dump truck compartment, and under the action of the driving assembly 200, the front top plate assembly 300 rotates around the connecting shaft 303 on one side of the supporting component 100, unfolds parallel to the compartment side panel, adjusts the distance between the front top plate 301 and the compartment side panel 4, and the fluid bag 4010 is tied with a binding rope 4011 and fixedly installed on the front top plate 301 of the front top plate assembly 300, and then the expansion performance test of the automobile compartment to be tested is started, and an air pump is used to pressurize each fluid bag according to the load calculation result. After the test, the upper, middle and lower three measuring points are selected on the same vertical line in the height direction of the middle position of the compartment side panel, and the maximum expansion value is measured. The measurement is performed three times, and the arithmetic average of the three measured values ​​is taken as the deformation value of the automobile compartment expansion performance.

[0066] In a second aspect, the present application provides a test method for detecting the expansion performance of a dump truck compartment, comprising:

[0067] S1. A detection device for detecting the expansion performance of a dump truck compartment is arranged in the compartment to be tested, and 50% of a preset test load is applied to the compartment side panel of the compartment to be tested by using the detection device for detecting the expansion performance of a dump truck compartment, and then the preset test load is unloaded, and the actual position of the compartment side panel after unloading 50% of the preset test load is used as the zero point for measuring the deformation of the automobile compartment expansion performance;

[0068] S2, using a detection device for detecting the expansion performance of a dump truck compartment to apply a preset test load to the surface of the compartment side panel of the compartment of the vehicle to be tested, and the time for applying the preset test load is a first duration;

[0069] S3. After applying the preset test load, select the upper, middle and lower three measuring points on the same vertical line in the height direction in the middle area of ​​the car body side panel in the length direction, and measure the maximum value of the expansion volume; measure three times, and take the arithmetic mean of the maximum values ​​of the three measured expansion volumes as the deformation value of the dump truck's expansion performance.

[0070] In the embodiments of the present application, Fig.12 As shown, the deformation point D after the test load is applied d The distance difference D from the zero point D0 x As the value of the expansion volume.

[0071] The present application embodiment is a test method for detecting the expansion performance of a dump truck compartment. The test device for detecting the expansion performance of a dump truck compartment is used to apply 50% of a preset test load to the compartment side panel of the compartment of the vehicle to be tested. Then, 50% of the preset test load is unloaded. The actual position of the compartment side panel after unloading 50% of the preset test load is used as the zero point for measuring the deformation of the vehicle compartment expansion performance. The test device for detecting the expansion performance of a dump truck compartment is then used to simulate the situation in which the side panel of the compartment to be tested is subjected to pressure when transporting corresponding materials. A preset test load equal to the pressure when transporting the corresponding materials is applied to the surface of the side panel of the car compartment, and maintained for a first time to act on the side panel of the car compartment. After the preset test load is applied, the upper, middle and lower three measuring points are respectively taken on the same vertical line in the height direction of the middle position of the side panel of the car compartment to measure the maximum value of the expansion relative to the zero point; the expansion is measured three times, and the arithmetic mean of the three measured values ​​is taken as the deformation value of the expansion performance of the car compartment, that is, the expansion of the dump truck compartment, so as to effectively detect and measure the expansion performance of the dump truck compartment. Therefore, the dump truck compartment can be improved and designed according to the deformation value of the expansion performance.

[0072] The test method for detecting the expansion performance of the dump truck compartment in the embodiment of the present application can simulate the application of a corresponding preset test load to the dump truck compartment according to the application environment or scenario of the dump truck, that is, the materials it may transport and the possible application scenarios, to obtain the expansion amount of the dump truck, and then make design improvements to the dump truck compartment.

[0073] In the embodiment of the present application, the time for applying 50% of the preset test load is more than 5 minutes, so as to effectively simulate the load applied to the side panels of the carriage at the initial stage of loading materials.

[0074] In some embodiments of the present application, a preset test load applied to the surface of the side panel of the compartment to be tested by a detection device for detecting the expansion performance of a dump truck compartment is calculated according to the following formula (1):

[0075]

[0076] In formula (1), P is the preset test load applied to the side panel of the vehicle to be tested, unit: Pa;

[0077] ρ, density of the material transported in the carriage, unit: kg / m 3 ;

[0078] g, acceleration due to gravity, unit: m / s 2 ;

[0079] h, the vertical distance between the calculation position and the reference reference point of the car side panel, where the reference reference point is the top of the same vertical line of the car side panel, and the calculation position is the position where the load needs to be applied at the corresponding height, unit: meter, m;

[0080] The friction angle between the transported material in the carriage and the side panels of the vehicle carriage to be tested, unit: degree (°).

[0081] In the embodiments of the present application, according to formula (1), the deformation caused by the pressure of the materials received by the side panels of the dump truck compartment when transporting the corresponding materials can be effectively simulated, thereby effectively measuring the expansion of the dump truck compartment. It should be noted that the reference datum point is the top of the same vertical line of the side panels of the compartment when the car compartment is fully loaded with materials, so as to calculate the size of the load required to be applied at the corresponding height position according to the height of the corresponding material loaded. The position where the load needs to be applied here is the position in the compartment where the expansion test needs to be carried out in the height direction of the vertical line L when the material is fully loaded. The reference datum point is the parameter value for calculating the preset test load, and is a different parameter from the zero point for calculating the deformation value.

[0082] In some embodiments of the present application, the first duration of applying the preset test load is ≥5 minutes. The first duration of applying the preset test load is more than 5 minutes to simulate the compression of the dump truck compartment by the corresponding materials when the dump truck compartment is transporting the corresponding materials, that is, the load, thereby effectively testing the expansion performance of the dump truck compartment.

[0083] It can be understood that in order to effectively measure the expansion performance of the dump truck compartment, the operations of steps S2 and S3 can be performed multiple times to obtain the changes in the expansion performance of the dump truck compartment and the corresponding expansion amount after long-term transportation of corresponding materials.

[0084] Embodiment 1 A detection device for detecting the expansion performance of a dump truck compartment, such as Figure 4As shown, it includes: four test device units 1; the test device unit 1 includes: a support component 100, which can be fixed or moved; a front top plate assembly 300, which is arranged on the first side of the support component 100; a flexible pressure assembly 400, which is arranged on the side of the front top plate assembly 300 away from the bottom support component 100; a driving assembly 200, which is respectively connected to the support component 100 and the front top plate assembly 300, the driving assembly 200 drives the front top plate assembly 300 to move toward the side plate 4 of the vehicle compartment 3 to be tested, and the flexible pressure assembly 400 applies a test load to the side plate 4 of the vehicle compartment 3 to be tested. The front top plate assembly 300 is rotatably connected to the support component 100, and the driving assembly 200 drives the front top plate assembly 300 to rotate around the rotation connection between the front top plate assembly 300 and the support component 100, and moves toward the side plate 4 of the vehicle compartment 3 to be tested, and the flexible pressure assembly 400 applies a test load to the side plate 4 of the vehicle compartment 3 to be tested.

[0085] like Figure 7 As shown, the support component 100 includes: a frame 102, including four vertical rods 102a, and horizontal rods 102b arranged around the top and bottom of the vertical rods 102a and vertically connected to the vertical rods 102a; a connecting plate 101, arranged at the top of the frame 102, and the connecting plate 101 is connected to the driving assembly 200; a connecting pin 103, arranged on one side of the top of the frame 102, and the connecting pin 103 is connected to the front top plate assembly 300; a roller 104, arranged at the bottom of the frame 102, and the roller 104 is provided with a braking component.

[0086] like Figure 8 As shown, the front top plate assembly 300 includes: a front top frame 302, including a longitudinal rod 302a and a transverse rod 302b, the longitudinal rod 302a and the transverse rod 302b are vertically connected to each other along the same plane to form the front top frame 302; a front top plate 301, which is arranged on the side of the front top frame 302 away from the support component 100; a connecting shaft 303, which is arranged on the side where the front top frame 302 is connected to the support component 100; a connecting block 304, which is arranged on the upper part of the connecting shaft 303, and the connecting block 304 is connected to the driving assembly 200. The connecting pin 103 of the supporting component 100 is coaxially connected to the connecting shaft 303 of the front top plate assembly 300, so that under the drive of the driving assembly 200, the front top plate assembly 300 can rotate and unfold around the connecting shaft 303 to apply a test load to the side panel of the vehicle compartment to be tested.

[0087] like Figure 5 and Figure 6 As shown, the driving assembly 200 includes a telescopic cylinder 201 and a telescopic rod 202 extending or retracting in the telescopic cylinder 201. The end of the telescopic cylinder 201 away from the telescopic rod 202 is connected to the supporting component 100, and the end of the telescopic rod 202 away from the telescopic cylinder 201 is connected to the front top plate assembly 300. The telescopic cylinder 201 is an oil cylinder. Figure 5 , Figure 6 and Figure 8 As shown, the connecting pin 103 of the supporting component 100 is coaxially connected to the connecting shaft 303 of the front top plate assembly 300, the connecting plate 101 is connected to the connecting block 304 in the front top plate assembly 300 through the driving component 200, the telescopic cylinder 201 is rotatably connected to the connecting plate 101 of the supporting component 100, and the telescopic rod 202 is rotatably connected to the connecting block 304 of the front top plate assembly 300, so that under the drive of the driving component 200, the front top plate assembly 300 can be rotated and unfolded around the connecting shaft 303 to apply a test load to the side panel of the vehicle compartment to be tested.

[0088] like Fig. 9 and Fig.10 As shown, the flexible pressure-applying assembly 400 includes: more than two fluid capsules 401, which are arranged on the side of the front top plate assembly 300 away from the support component 100; each fluid capsule 401 is composed of a plurality of independent fluid capsules 4010, and the fluid capsule 4010 is provided with a fluid inlet and outlet 4010a. The binding rope 4011 fixes the fluid capsule 401 on the side of the front top plate assembly 300 away from the support component 100, so that the fluid capsule 401 can be fixed on the side of the front top plate 301 away from the support component 100. The fluid capsule 4010 is an airbag filled with air.

[0089] Example 2 Taking the transport of gravel in the truck compartment as an example, the test method for detecting the expansion performance of the dump truck compartment includes:

[0090] S1, such as Figure 1 , Figure 2 and Figure 3 As shown, a detection device for detecting the expansion performance of a dump truck compartment is arranged in the compartment to be tested, and a 50% preset test load is applied to the compartment side panel of the compartment to be tested by using the detection device for detecting the expansion performance of a dump truck compartment. The application time of 50% of the preset test load is 10 minutes, and then the preset test load is unloaded. The actual position of the compartment side panel after unloading 50% of the preset test load is used as the zero point for measuring the deformation of the automobile compartment expansion performance;

[0091] S2, such as Fig.11 As shown, a detection device for detecting the expansion performance of a dump truck compartment is used to apply a preset test load to the surface of the compartment side panel of the compartment of the vehicle to be tested, and the time for applying the preset test load is a first time length, that is, 5 minutes; wherein, when applying the preset test load, the preset test load at the corresponding position can be calculated according to the following formula (1):

[0092]

[0093] In formula (1), P is the preset test load applied to the side panel of the vehicle to be tested, unit: Pa;

[0094] ρ, density of the material transported by the carriage, i.e., gravel, unit: kg / m 3 ;

[0095] g, acceleration due to gravity, unit: m / s 2 ;

[0096] h, the vertical distance between the calculation position and the reference reference point of the side panel of the vehicle compartment, where the reference reference point is the top of the same vertical line of the side panel of the vehicle compartment when the dump truck compartment is fully loaded with sand and gravel. The calculation position is the position at the corresponding height where the load needs to be applied, unit: meter, m;

[0097] The friction angle between the transported material in the carriage and the side panel of the vehicle carriage to be tested, unit: degree (°);

[0098] S3. After the preset test load is applied, Fig.12 As shown in FIG. 1 , three measuring points, namely, upper measuring point 501, middle measuring point 502 and lower measuring point 503, are selected on the same vertical line L in the height direction of the middle position of the side panel of the carriage to measure the maximum value of the expansion amount; among them, the deformation point D after applying the test load is taken as d The distance difference D from the zero point D0 x As the value of the expansion volume of each measuring point; measure three times, and take the arithmetic mean of the maximum values ​​of the three measured expansion volumes as the deformation value of the dump truck's expansion performance.

[0099] As shown in Table 1, the test data of the expansion of the dump truck compartment measured by the detection device for detecting the expansion performance of the dump truck compartment when testing the transportation of sand and gravel in Example 2 are as follows:

[0100] Table 1 Test results of dump truck compartment expansion

[0101]

[0102] From Table 1, we can see that the maximum values ​​of the expansion of the dump truck compartment are 15.5mm, 14.2mm, and 15.8mm, respectively, and their arithmetic mean is 15.2mm, which is the expansion of the dump truck compartment. According to the expansion test results, the dump truck compartment can be improved and designed.

[0103] The above is only a specific implementation method of the present application. Those skilled in the art can clearly understand that for the convenience and simplicity of description, the specific working process described above can refer to the corresponding process in the aforementioned method embodiment, and will not be repeated here. It should be understood that the protection scope of the present application is not limited to this. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed in the present application, and these modifications or replacements should be included in the protection scope of the present application.

Claims

1. A detection device for detecting the expansion performance of a dump truck compartment, characterized in that: include: at least one test device unit; The testing device unit comprises: Support components, which can be fixed or moved; a front top plate assembly, disposed on a first side of the support member; A flexible pressure-applying component, disposed on a side of the front top plate component away from the supporting component; A driving assembly is connected to the supporting component and the front top plate assembly respectively, and the driving assembly drives the front top plate assembly to move toward the side plate of the vehicle compartment to be tested, and the flexible pressure assembly applies a test load to the side plate of the vehicle compartment.

2. The detection device according to claim 1, characterized in that: The front top plate assembly is rotatably connected to the support component, and the driving assembly drives the front top plate assembly to rotate around the rotatable connection between the front top plate assembly and the support component to move toward the compartment side panel of the automobile compartment to be tested, and the test load is applied to the compartment side panel by the flexible pressure assembly.

3. The detection device according to claim 1, characterized in that: The supporting member comprises: A frame, comprising at least three vertical rods, and horizontal rods arranged around the tops and bottoms of the vertical rods and vertically connected to the vertical rods; A connecting plate, disposed on the top of the frame, the connecting plate being connected to the driving assembly; A connecting pin, disposed on one side of the top of the frame, the connecting pin being connected to the front top plate assembly; The roller is arranged at the bottom of the frame, and the roller is provided with a braking component.

4. The detection device according to claim 1, characterized in that: The front top plate assembly comprises: A front top frame, comprising a longitudinal rod and a transverse rod, wherein the longitudinal rod and the transverse rod are vertically connected to each other along the same plane to form the front top frame; A front top plate, arranged on a side of the front top frame away from the supporting component; A connecting shaft, arranged on a side where the front top frame is connected to the supporting component; A connecting block is arranged on the upper part of the connecting shaft, and the connecting block is connected to the driving assembly.

5. The detection device according to claim 1, characterized in that: The flexible pressure-applying component comprises: More than two fluid capsules are arranged on a side of the front top plate assembly away from the supporting component; each of the fluid capsules is composed of a plurality of independent fluid capsules, and the fluid capsules are provided with fluid inlets and outlets.

6. The detection device according to claim 5, characterized in that: The binding rope fixes the fluid sac to a side of the front top plate assembly away from the supporting component.

7. The detection device according to claim 1, characterized in that: The driving assembly includes a telescopic cylinder and a telescopic rod extending or retracted in the telescopic cylinder, one end of the telescopic cylinder away from the telescopic rod is connected to the supporting component, and one end of the telescopic rod away from the telescopic cylinder is connected to the front top plate assembly.

8. A test method for detecting the expansion performance of a dump truck compartment, characterized in that: include: The detection device for detecting the expansion performance of a dump truck compartment as described in any one of claims 1 to 7 is arranged in the compartment of the vehicle to be tested, and 50% of the preset test load is applied to the compartment side panel of the vehicle compartment to be tested by using the detection device for detecting the expansion performance of a dump truck compartment, and the preset test load is unloaded, and the actual position of the compartment side panel after unloading 50% of the preset test load is used as the zero point for measuring the deformation of the compartment expansion performance; Using the detection device for detecting the expansion performance of a dump truck compartment to apply a preset test load to the surface of the compartment side panel of the compartment to be tested, the time for applying the preset test load is a first duration; After applying the preset test load, select the upper, middle and lower measurement points on the same vertical line in the height direction in the middle area of ​​the car body side panel in the length direction to measure the maximum value of the expansion amount; measure three times, and take the arithmetic mean of the maximum values ​​of the three measured expansion amounts as the deformation value of the dump truck car body expansion performance.

9. The test method according to claim 8, characterized in that The preset test load applied to the surface of the side panel of the compartment to be tested by the detection device for detecting the expansion performance of the compartment of the dump truck is calculated according to the following formula (1): In formula (1), P is the preset test load applied to the side panel of the vehicle to be tested, unit: Pa; ρ, density of the material transported in the carriage, unit: kg / m 3 ; g, acceleration due to gravity, unit: m / s 2 ; h, the vertical distance between the calculated position and the reference point of the side panel of the carriage, where the reference point is the top of the same vertical line of the side panel of the carriage, unit: meter, m; The friction angle between the material transported in the carriage and the side panel of the carriage to be tested, unit: degree (°).

10. The test method according to claim 8, characterized in that: The first duration of applying the preset test load is ≥5 minutes.

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