Vehicle load test verification platform and test method

Abstract

The invention provides a vehicle load test verification platform and a test method, and relates to the technical field of vehicle tests.The platform comprises a test room, a drum dynamometer assembly and a movable loading assembly, and a pit is formed in the test room; the rotary drum dynamometer assembly comprises a first rotary drum dynamometer assembly and a second rotary drum dynamometer assembly, one of the first rotary drum dynamometer assembly and the second rotary drum dynamometer assembly is fixedly arranged in the pit, the other one is arranged in the pit through a movable adjusting mechanism, and the movable adjusting mechanism is used for driving the first rotary drum dynamometer assembly and the second rotary drum dynamometer assembly to move oppositely or oppositely; the plurality of mobile loading assemblies are used for respectively carrying out load tests on different output shafts of the vehicle. According to the platform and the test method, the movable drum dynamometer assembly can be adjusted in place at a time; the situation that in the prior art, a driver needs to repeatedly adjust the position of the agricultural machine and repeatedly adjust the position of the drum dynamometer assembly is avoided as much as possible, the detection efficiency is greatly improved, and the test difficulty is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle testing, and in particular to a vehicle load testing verification platform and a testing method. Background Art

[0002] The agricultural machinery vehicle load test verification platform mainly simulates road driving and field operation conditions, and conducts transmission efficiency, speed torque calibration and reliability tests of various types of wheeled tractors and harvesting machinery (grain combine harvesters, silage machines, etc.) with a capacity of 100 to 400 hp in the laboratory. Its purpose is to reproduce the field load spectrum and road spectrum through indoor bench tests to simulate the field test of agricultural machinery, effectively evaluate the efficiency and reliability of the transmission system of agricultural machinery, and truly feedback the failure mode and defects of agricultural machinery; identify risk points early, provide a basis for product improvement, and shorten the product verification cycle; However, the existing agricultural machinery vehicle load test verification platform still has many shortcomings;

[0003] A Chinese patent (publication number: CN117168806A) discloses a whole-vehicle test platform and a test method for agricultural machinery; a chassis dynamometer, a PTO loading test bench and a plurality of mobile loading test benches are arranged in the test room of the patent; the chassis dynamometer is used to test the travel system of the agricultural machinery placed on the chassis dynamometer; each mobile loading test bench is respectively used to connect with the transmission system of each auxiliary component of the agricultural machinery to test it; in actual use, it is found that due to the different wheelbases of different agricultural machinery chassis, the position of the chassis dynamometer needs to be adjusted before the test, and then the driver drives the agricultural machinery to be tested onto the test bench. If the position of the chassis dynamometer is not suitable, the agricultural machinery to be tested needs to be driven off the test bench and then the position of the chassis dynamometer needs to be adjusted. Multiple adjustments will take a long time, and the above defects are problems that need to be solved urgently by technical personnel in this field; in addition, when simulating an ambient temperature of -25°C to 60°C, the patent needs to make the entire test room at -25°C to 60°C, which consumes more energy on the one hand and has a greater impact on the equipment in the test room on the other hand, which is easy to cause premature failure of the test equipment. Summary of the invention

[0004] The present invention provides a vehicle load test verification platform and a test method to solve at least one problem in the above-mentioned background technology.

[0005] The present invention provides a vehicle load test verification platform, the platform comprising:

[0006] A test room, wherein a pit is provided in the test room;

[0007] A drum dynamometer assembly is used to simulate vehicle driving conditions, the drum dynamometer assembly includes two coaxially arranged first drum dynamometer assemblies and two coaxially arranged second drum dynamometer assemblies, the first drum dynamometer assembly and the second drum dynamometer assembly are arranged at intervals, one of the two is fixed in the pit and the other is arranged in the pit through a movable adjustment mechanism, the movable adjustment mechanism is used to drive the two to move toward or away from each other to adjust the distance between the two to correspond to the front wheels and rear wheels of the vehicle respectively; and,

[0008] A mobile loading assembly, wherein the mobile loading assembly is provided in plurality and all are arranged in the test room and are used for respectively performing load tests on different output shafts of the vehicle.

[0009] Optionally, the movement adjustment mechanism comprises:

[0010] A first track, wherein the first track has a plurality of tracks which are fixed in parallel and spaced apart in the pit; the first drum dynamometer assembly is slidably or rollingly connected to the first track;

[0011] The first driving device is transmission-connected to the first drum dynamometer assembly to drive the first drum dynamometer assembly to approach or move away from the second drum dynamometer assembly along the first track.

[0012] Optionally, the platform further comprises a lifting device, and the lifting device comprises:

[0013] A second track, the second track is arranged in the pit and is parallel to and spaced from the first track;

[0014] A lifting base is disposed on the second track and is connected to the second track in a sliding or rolling manner;

[0015] A lifting platform is arranged above the lifting base at intervals and is used to carry the vehicle;

[0016] A lifting arm, wherein the lifting arm is a scissor-type lifting arm, one end of which is arranged on the lifting base, and the other end is arranged on the lifting platform; and

[0017] The second driving device is transmission-connected to the lifting base and is used for driving the lifting base to move along the second track.

[0018] Optionally, the lifting platform is provided with a crossbeam, the length direction of the crossbeam is perpendicular to the extension direction of the second track, and there are a plurality of crossbeams which are arranged in parallel at intervals;

[0019] The cross beam comprises a hollow sleeve and a support rod sleeved on the sleeve, the support rod can be extended and retracted relative to the sleeve under the action of external force, and a support seat is provided at the end of the support rod, and the support seat is used to support the vehicle.

[0020] Optionally, a threaded hole with an upward opening is provided on the upper end surface of the support seat, a screw rod is threadedly connected to the threaded hole, and a support plate is fixedly provided at the top end of the screw rod.

[0021] Optionally, a flexible thermal insulation cover and columns are further provided in the test room. The columns are multiple and vertically arranged at intervals in the outer area of ​​the pit. The flexible thermal insulation cover is hung on the columns by pull ropes to form an insulating space capable of accommodating the drum dynamometer assembly, the mobile loading assembly and the vehicle.

[0022] Optionally, a hanging net is provided on the surface of the flexible heat-insulating cover, a node of the hanging net is fixedly connected to the surface of the flexible heat-insulating cover, and one end of the pull rope is fixedly connected to the hanging net.

[0023] Optionally, a traction pile is further provided in the test room. The traction pile is in multiple numbers and vertically arranged at intervals, and is used to tow the front and rear of the vehicle respectively. The traction pile is a vertical telescopic structure, which does not affect the entry and exit of the vehicle when retracted into position, and can block the entry and exit of the vehicle when extended into position.

[0024] Optionally, a negative pressure suction device for collecting vehicle exhaust gas is provided in the test room;

[0025] And / or, the output shaft of the drum dynamometer assembly is connected to a kinetic energy recovery device;

[0026] And / or, a floor is detachably fixed to the open portion of the pit, and the floor is used to cover the open portion of the pit.

[0027] The present invention also provides a vehicle load testing method, using the above platform, the testing method comprising:

[0028] S100, confirming that the vehicle is located on the top of the lifting device, and controlling the lifting device to lift the vehicle until the tires of the vehicle are off the ground;

[0029] S200, controlling the lifting device to move along the second track until the vehicle is located at the test station; controlling the first drum dynamometer assembly to move along the first track to approach or move away from the second drum dynamometer assembly; wherein the second drum dynamometer assembly is fixed to the pit, one of the front wheel and the rear wheel of the vehicle corresponds to the first drum dynamometer assembly, and the other corresponds to the second drum dynamometer assembly;

[0030] S300, controlling the lifting device to descend until one of the front wheel and the rear wheel of the vehicle falls on the first drum dynamometer assembly, and the other falls on the second drum dynamometer assembly.

[0031] The vehicle load test verification platform and test method provided by the present invention have the following beneficial effects:

[0032] Taking the testing of agricultural machinery chassis as an example, since the first drum dynamometer assembly and the second drum dynamometer assembly are arranged at intervals, one of them is fixed in the pit, and the other is arranged in the pit through a movable adjustment mechanism. The movable adjustment mechanism can drive the two to move toward or away from each other to adjust the distance between them to correspond to the front and rear wheels of the vehicle respectively. The driver does not need to operate the agricultural machinery, and the two movable drum dynamometer assemblies can be adjusted into place at one time; the need for the driver to repeatedly adjust the position of the agricultural machinery and repeatedly adjust the position of the drum dynamometer assembly in the prior art is avoided as much as possible, which greatly improves the detection efficiency and reduces the difficulty of testing. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 A schematic diagram of the three-dimensional layout structure of one implementation mode in a test room in a vehicle load test verification platform provided by an embodiment of the present invention;

[0034] Figure 2 A schematic diagram of a top view of one implementation of a test room in a vehicle load test verification platform provided by an embodiment of the present invention;

[0035] Figure 3 A schematic diagram of a three-dimensional structure of one implementation of a lifting device in a vehicle load test verification platform provided by an embodiment of the present invention;

[0036] Figure 4 A schematic diagram of the main structure of one embodiment of the lifting device in the vehicle load test verification platform provided by an embodiment of the present invention;

[0037] Figure 5 A schematic structural diagram of one implementation of a flexible thermal insulation cover in a vehicle load test verification platform provided in an embodiment of the present invention.

[0038] In the figure:

[0039] 1-drum dynamometer assembly; 2-mobile loading assembly; 3-first track;

[0040] 4-driving device; 5-second track; 6-lifting device;

[0041] 601-lifting base; 602-crossbeam; 603-support seat;

[0042] 604-support plate; 605-screw rod; 606-lifting arm; 607-lifting platform;

[0043] 7-flexible insulation cover; 8-column; 9-pull rope; 10-hanging net;

[0044] 11- traction pile; 12- negative pressure suction device; 13- floor. DETAILED DESCRIPTION

[0045] The present invention can be explained in detail through the following embodiments. The purpose of disclosing the present invention is to protect all technical improvements within the scope of the present invention. In the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "front", "back", "left", "right", etc. indicating directions or positional relationships, they only correspond to the drawings of the present application for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific direction.

[0046] The embodiment of the present invention provides a vehicle load test verification platform, such as Figure 1-Figure 4 As shown, the platform includes: a test room, a drum dynamometer assembly 1 and a mobile loading assembly 2, wherein a pit is provided in the test room; the drum dynamometer assembly 1 is used to simulate vehicle driving conditions, the drum dynamometer assembly 1 includes two coaxially arranged first drum dynamometer assemblies and two coaxially arranged second drum dynamometer assemblies, the first drum dynamometer assembly and the second drum dynamometer assembly are arranged at intervals, one of the two is fixed in the pit and the other is arranged in the pit through a mobile adjustment mechanism, the mobile adjustment mechanism is used to drive the two to move toward or away from each other to adjust the distance between the two to correspond to the front wheel and the rear wheel of the vehicle respectively; there are multiple mobile loading assemblies 2, and they are all arranged in the test room, and are used to perform load tests on different output shafts of the vehicle respectively.

[0047] Taking the testing of the agricultural machinery chassis as an example, since the first drum dynamometer assembly and the second drum dynamometer assembly are arranged at intervals, one of them is fixed in the pit, and the other is arranged in the pit through a movable adjustment mechanism. The movable adjustment mechanism can drive the two to move toward or away from each other to adjust the distance between the two to correspond to the front and rear wheels of the vehicle respectively. The driver does not need to operate the agricultural machinery, and the two movable drum dynamometer assemblies can be adjusted in place at one time; the existing technology requires the driver to repeatedly adjust the position of the agricultural machinery and the position of the drum dynamometer assembly to be avoided as much as possible, which greatly improves the detection efficiency and reduces the difficulty of the test. In addition, for different types of agricultural machinery with different wheelbases, when testing the agricultural machinery chassis, it is only necessary to adjust the distance between the first drum dynamometer assembly and the second drum dynamometer assembly in the pit according to the wheelbase of the agricultural machinery through the movable adjustment mechanism, so that the four drum dynamometer assemblies 1 can correspond to the four wheels of the agricultural machinery one by one, which greatly improves the applicability of the platform.

[0048] In an embodiment of the present invention, the movable adjustment mechanism includes: a first track 3 and a first driving device 4, the first track 3 has multiple and spaced parallel fixed in the pit; the first drum dynamometer assembly is slidably or rollingly connected to the first track 3, wherein the specific connection method can be multiple, for example, in this embodiment, still taking the first drum dynamometer assembly as an example that the first drum dynamometer assembly is movable and the second drum dynamometer assembly is fixedly installed in the pit, a slide groove matching the first track can be directly provided on the first drum dynamometer assembly, or a slider can be provided, the slider is slidably connected to the first track 3, and the slider is fixed on the first drum dynamometer assembly, under the sliding guiding action of the slider and the first track, the first drum dynamometer assembly can be driven along the first track to approach or move away from the second drum dynamometer assembly, or the slider in the above-mentioned movable adjustment mechanism can be replaced by a roller, wherein the roller is rollingly connected to the first track, the roller is provided on the first drum dynamometer assembly, and under the rolling guiding action of the roller and the first track, the first drum dynamometer assembly can be driven along the first track 3 to approach or move away from the second drum dynamometer assembly.

[0049] The first driving device 4 is transmission-connected to the first drum dynamometer assembly. When the first driving device 4 is working, under the sliding guidance of the slider and the first track 3, the first drum dynamometer assembly can be driven along the first track to approach or move away from the second drum dynamometer assembly, or, under the rolling guidance of the roller and the first track 3, the first drum dynamometer assembly can be driven along the first track 3 to approach or move away from the second drum dynamometer assembly.

[0050] The first driving device 4 may be a telescopic cylinder, such as a hydraulic cylinder, a pneumatic cylinder, an electric cylinder, etc., which pushes the two movable first drum dynamometer assemblies to move along the first track 3, thereby adjusting the distance between the two first drum dynamometer assemblies and the two fixed second drum dynamometer assemblies, so that the four drum dynamometer assemblies (two first drum dynamometer assemblies and two second drum dynamometer assemblies) can correspond to the four wheels of the agricultural machinery respectively; in addition, the first driving device 4 may also be mainly composed of a screw nut transmission mechanism driven by a motor. That is, the nut is tightly connected to the two movable first drum dynamometer assemblies, the nut and the lead screw form a lead screw nut pair, the motor drives the lead screw to rotate, and the lead screw drives the nut to move axially, thereby pushing the two first drum dynamometer assemblies to move along the first track 3, thereby adjusting the distance between the two first drum dynamometer assemblies and the two second drum dynamometer assemblies, so that the four drum dynamometer assemblies 1 can correspond to the four wheels of the agricultural machinery respectively. It should be noted that the nut at this time plays the role of a slider, as a carrier to drive the first drum dynamometer assembly to move.

[0051] In the embodiment of the present invention, the platform also includes a lifting device 6, which includes: a second track 5, a lifting base 601, a lifting platform 607, a lifting arm 606 and a second driving device (not shown in the figure), wherein the second track 5 is arranged in the pit and is arranged parallel to the first track 3 at intervals; the lifting base 601 is arranged on the second track 5 and is slidingly or rollingly connected to the second track 5, that is, the lifting base 601 can move along the second track 5; the lifting platform 607 is arranged at intervals above the lifting base for carrying vehicles; the lifting arm 606 is a scissors-type lifting arm, one end of which is arranged on the lifting base 601, and the other end is arranged on the lifting platform 607; the second driving device is transmission-connected to the lifting base 601, and is used to drive the lifting base 601 to move along the second track 5. Still taking the example that the first drum dynamometer assembly is movable and the second drum dynamometer assembly is fixedly installed in the pit, with such a configuration, when testing the chassis of the agricultural machinery, the agricultural machinery is moved by the lifting device, and the two wheels at the head or tail of the agricultural machinery correspond to the two fixed second drum dynamometer assemblies, and then the positions of the two movable first drum dynamometer assemblies are adjusted to be close to or away from the second drum dynamometer assembly, without the need for the driver to operate the agricultural machinery, and the two movable first drum dynamometer assemblies can be adjusted in place at one time; avoiding the need for the driver to repeatedly adjust the position of the agricultural machinery and the position of the drum dynamometer assembly in the prior art, greatly improving the detection efficiency and reducing the difficulty of the test. That is, by lifting the agricultural machinery through the lifting device 6 and controlling the lifting device 6 to move along the second track 5, the position of the agricultural machinery can be adjusted quickly and accurately, so that the four wheels of the agricultural machinery can accurately correspond to the four drum dynamometer assemblies 1 respectively. In addition, the lifting device has a simple structure and good support, and can stably lift the agricultural machinery.

[0052] It should be noted that the above-mentioned scissor fork lifting arm includes a cross-hinged first arm and a second arm, wherein one end of one arm (the first arm or the second arm) is hinged to the lifting base 601, and the other end is hinged to the lifting platform 607; one end of the other arm is slidably connected to the lifting base 601, and the angle between the two can change during the sliding process, and the other end is slidably connected to the lifting platform 607, and the angle between the two can change during the sliding process.

[0053] In the embodiment of the present invention, specifically, Figure 3 , Figure 4As shown, the lifting platform 607 is provided with a crossbeam 602, the length direction of the crossbeam 602 is perpendicular to the extension direction of the second track 5, and the crossbeam 602 has multiple and spaced parallel arrangements; the crossbeam 602 includes a hollow sleeve and a support rod sleeved on the sleeve, the support rod can be telescopic relative to the sleeve under the action of an external force, and a support seat 603 is provided at the end of the support rod, and the support seat 603 is used to support the vehicle. During use, when it is necessary to lift the agricultural machinery, the position of the support seat 603 can be adjusted by pulling (telescopic) the support rod according to the structural characteristics of the agricultural machinery chassis, so that the support seat 603 can effectively contact the appropriate position of the agricultural machinery chassis, thereby stably lifting the agricultural machinery; the structural characteristics of the telescopic crossbeam can adapt to vehicles of different widths, further enhancing the applicability of the platform. Specifically, the support seat 603 is arranged at right angles to the crossbeam 602, that is, the length directions of the two are perpendicular, and the support seat 603 is located above the end of the crossbeam 602.

[0054] In the embodiment of the present invention, the upper end surface of the support seat 603 is provided with a threaded hole with an opening facing upward, and a screw 605 is threadedly connected to the threaded hole. A support plate 604 is fixedly provided at the top of the screw 605, and the upper end surface of the support plate 605 is used to support the chassis of the agricultural machinery. With such a configuration, the height of the support plate 604 can be adjusted by screwing the support plate 604 or the screw 605, that is, the height of the support plate 604 can be adjusted before lifting, so that the four support plates 604 are all in contact with the chassis of the agricultural machinery. Regardless of whether the chassis of the agricultural machinery is flat, the agricultural machinery can be lifted horizontally, and the smooth lifting of the agricultural machinery can be ensured; Note It is worth noting that the lifting device 6 can not only be used to lift the agricultural machinery, but also can realize repeated lifting of one side or one point of the agricultural machinery chassis, or lifting one wheel of the agricultural machinery by installing only two support plates 604 or only a single support plate 604 on the same side and repeatedly lifting the agricultural machinery chassis to simulate uneven roads such as potholes, slopes, and ridges to test the suspension of the agricultural machinery chassis; it is also possible to simulate uneven roads such as potholes, slopes, and ridges by adjusting only the height of the two support plates 604 or a single support plate 604 on one side and repeatedly lifting the agricultural machinery chassis.

[0055] The inventors found in actual use that since agricultural machinery needs to be tested in an environment of -30℃ to 60℃, and the test room is large, heating or cooling the entire test room will not only take a long time, but also consume a lot of energy. The test room also needs to take adequate insulation measures, which is costly. To solve this problem, in the embodiment of the present invention, Figure 1 , Figure 5As shown, a flexible thermal insulation cover 7 and columns 8 are provided in the test room. The columns 8 have multiple columns and are vertically arranged at intervals in the outer area of ​​the pit. The flexible thermal insulation cover 7 is hung on the columns 8 by a pull rope 9 to form an insulation space capable of accommodating the drum dynamometer assembly 1, the mobile loading assembly 2 and the vehicle. Specifically, columns 8 are provided around the corresponding flexible thermal insulation cover 7 in the test room, and the four corner ends of the top of the flexible thermal insulation cover 7 are respectively hung with the corresponding columns 8 by pull ropes 9, that is, the flexible thermal insulation cover 7 can be set according to the size of the agricultural machinery, thereby effectively reducing the space that needs temperature control, so as to reduce energy consumption and reduce the cost of use; at the same time, other equipment in the test room can be isolated to prevent other equipment in the test room from failing prematurely due to unnecessary temperature influences; the flexible thermal insulation cover 7 can be made of flexible thermal insulation material, and the space that needs insulation can be set as needed; during use, there is no need to heat up or cool down the entire test room, only the insulation space formed by the flexible thermal insulation cover 7 needs to be temperature-controlled, that is, heating or cooling, and insulation is required, and the temperature adjustment takes a short time, that is, the insulation space in the flexible thermal insulation cover 7 can be quickly temperature-controlled and insulated while consuming less energy.

[0056] In the embodiment of the present invention, a hanging net 10 is provided on the surface of the flexible heat preservation cover 7, and the nodes of the hanging net 10 are fixedly connected to the surface of the flexible heat preservation cover 7, and one end of the pull rope 9 is fixedly connected to the hanging net, and the other end is fixedly connected to the column 8. The provision of the hanging net 10 can effectively increase the structural strength of the flexible heat preservation cover 7 on the one hand, and on the other hand, when only the nodes of the hanging net 10 are correspondingly and tightly connected to the flexible heat preservation cover 7, the mesh surface part of the hanging net 10 is separated from the flexible heat preservation cover 7, which can facilitate the connection of the pull rope 9, so that the size of the required heat preservation space can be quickly changed as needed.

[0057] In the embodiment of the present invention, a traction pile 11 is further provided in the test room. The traction pile 11 has multiple traction piles 11 and is vertically arranged at intervals, respectively used to tow the front and rear of the vehicle; the traction pile 11 is a vertical telescopic structure, which does not affect the vehicle's entry and exit when retracted into position, and can block the vehicle's entry and exit when extended into position. In actual use, a protective traction rope can be set through the traction pile 11 to prevent the agricultural machinery from accidentally rushing out, or the traction pile 11 can be used as a fixed pile when testing the traction power of the agricultural machinery. Since the traction pile 11 can be vertically retracted, the traction pile 11 can be retracted below the vehicle chassis when not in use, or even retracted below the ground to avoid interference with other parts that need to be moved.

[0058] In an embodiment of the present invention, a negative pressure suction device 12 for collecting vehicle exhaust gas is provided in the test room; specifically, the negative pressure suction device 12 can be set at both ends of the pit to more efficiently collect agricultural machinery exhaust gas, that is, the exhaust gas generated by the agricultural machinery when working can be sucked by the negative pressure suction device 12 to avoid polluting the air environment in the test room, thereby effectively protecting the physical and mental health of the operator.

[0059] In an embodiment of the present invention, the output shaft of the drum dynamometer assembly 1 is connected to a kinetic energy recovery device to recover energy during the use of the platform. For example, when testing the output power of the agricultural machinery chassis, the kinetic energy recovery device can convert mechanical energy into kinetic energy, and then convert it into electrical energy, and safely feed it back to the power grid.

[0060] In the embodiment of the present invention, the open part of the pit is detachably fixed with a floor 13, and the floor 13 is used to cover the open part of the pit. That is, the pit opening can be closed by the floor 13 to prevent the operator from accidentally falling into the pit.

[0061] It should be noted that, in the embodiment of the present invention, the mobile loading assembly 2 is an existing device, and its structure and working principle will not be repeated in this embodiment. The mobile loading assembly 2 can test the output shafts of different points of the agricultural machinery according to the load spectrum, such as testing the transmission system of a certain type of receiver (including but not limited to the single longitudinal axial flow roller, double longitudinal rollers, engine, intermediate shaft, auger, reel, front cutter, bridge, cleaning device, elevator, re-stripper, grain unloading device, acceleration roller, rear chopper, front roller, rear roller, etc.) speed, torque, power, efficiency and other performance conditions (this part of the content can adopt the existing technology and will not be repeated here); the mobile loading assembly 2 located at the rear of the agricultural machinery can be used to test various performance parameters of the PTO shaft of the agricultural machinery (for example, speed, torque, power, efficiency, durability and other performance parameters, this part of the content can adopt the existing technology and will not be repeated here), and when in use, the mobile loading assembly 2 is connected to the tested shaft through a retractable universal shaft. The drum dynamometer assembly 1 is an existing device, and the embodiment of the present invention will not repeat its structure and working principle. The kinetic energy recovery device is also an existing device, and the embodiment of the present invention will not repeat its structure and working principle.

[0062] The embodiment of the present invention further provides a vehicle load testing method, using the above-mentioned vehicle load testing verification platform, the testing method comprises the following steps:

[0063] S100, confirming that the vehicle is located at the top of the lifting device, and controlling the lifting device to lift the vehicle until the tires of the vehicle are off the ground; in this step, the agricultural machine can be controlled to move to the top of the lifting device 6, and the lifting device 6 can be controlled to lift the agricultural machine until the four wheels of the agricultural machine are off the ground, that is, the chassis of the agricultural machine can be lifted by the lifting device 6 to lift the agricultural machine;

[0064] S200, control the lifting device to move along the second track until the vehicle is located at the test station; control the first drum dynamometer assembly to move along the first track to approach or move away from the second drum dynamometer assembly; wherein, taking the first drum dynamometer assembly being movably arranged in the pit and the second drum dynamometer assembly being fixed in the pit as an example, one of the front wheel and the rear wheel of the vehicle corresponds to the first drum dynamometer assembly, and the other corresponds to the second drum dynamometer assembly; specifically, control the lifting device 6 to move along the second track 5 until the two wheels at the head or tail of the agricultural machinery correspond to the two second drum dynamometer assemblies, The control driving device 4 adjusts the two first drum dynamometer assemblies to correspond to the two corresponding wheels of the agricultural machinery, that is, the agricultural machinery is moved by the lifting device 6, the two wheels at the head or tail of the agricultural machinery correspond to the two second drum dynamometer assemblies, and then the positions of the two first drum dynamometer assemblies are adjusted to the corresponding positions of the other two vehicles of the agricultural machinery, without the need for the driver to operate the agricultural machinery, and the two first drum dynamometer assemblies can be adjusted to the position at one time, avoiding the need for the driver to repeatedly adjust the position of the agricultural machinery and repeatedly adjust the position of the drum dynamometer assembly 1 in the traditional method, which greatly improves the detection efficiency and reduces the test difficulty;

[0065] S300, control the lifting device 6 to descend until one of the front wheel and the rear wheel of the vehicle falls on the first drum dynamometer assembly, and the other falls on the second drum dynamometer assembly; specifically, control the lifting device 6 to descend until the four wheels of the agricultural machinery fall on the four drum dynamometer assemblies 1 respectively, and then start testing the chassis of the agricultural machinery.

[0066] This testing method has all the beneficial effects of the above platform and will not be described in detail here.

[0067] The parts of the present invention that are not described in detail are prior art. It is obvious to those skilled in the art that the present invention is not limited to the details of the above-mentioned exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention; therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and it is intended that all changes that fall within the meaning and scope of equivalent elements are included in the present invention.

Claims

1. A vehicle load test verification platform, characterized in that: The platform includes: A test room, wherein a pit is provided in the test room; A drum dynamometer assembly (1) is used to simulate vehicle driving conditions, the drum dynamometer assembly (1) comprising two coaxially arranged first drum dynamometer assemblies and two coaxially arranged second drum dynamometer assemblies, the first drum dynamometer assembly and the second drum dynamometer assembly being arranged at intervals, one of the two being fixedly arranged in the pit, and the other being arranged in the pit via a movable adjustment mechanism, the movable adjustment mechanism being used to drive the two to move towards or away from each other, so as to adjust the distance between the two so as to correspond to the front wheels and rear wheels of the vehicle respectively; and A mobile loading assembly (2), wherein the mobile loading assembly (2) is provided in plurality and all are arranged in the test room and are used to perform load tests on different output shafts of the vehicle respectively.

2. The vehicle load test verification platform according to claim 1, characterized in that: The mobile adjustment mechanism comprises: A first track (3), the first track (3) having a plurality of tracks which are fixed in parallel and spaced apart in the pit; the first drum dynamometer assembly is slidably or rollingly connected to the first track (3); A first driving device is transmission-connected to the first drum dynamometer assembly to drive the first drum dynamometer assembly to move closer to or farther from the second drum dynamometer assembly along the first track (3).

3. The vehicle load test verification platform according to claim 2, characterized in that: The platform also includes a lifting device, and the lifting device includes: A second track (5), the second track (5) being arranged in the pit and being arranged parallel to and spaced from the first track (3); A lifting base (601) is disposed on the second track (5) and is connected to the second track (5) in a sliding or rolling manner; A lifting platform (607) is spaced above the lifting base (601) and is used to carry the vehicle; a lifting arm (606), wherein the lifting arm (606) is a scissor-type lifting arm, one end of which is arranged on the lifting base (601), and the other end of which is arranged on the lifting platform (607); and, The second driving device is transmission-connected to the lifting base (601) and is used to drive the lifting base (601) to move along the second track (5).

4. The vehicle load test verification platform according to claim 3, characterized in that: The lifting platform (607) is provided with a crossbeam (602), the length direction of the crossbeam (602) is perpendicular to the extension direction of the second track, and the crossbeam (602) is provided in plurality and arranged in parallel at intervals; The crossbeam (602) comprises a hollow sleeve and a support rod sleeved on the sleeve, wherein the support rod can be extended and retracted relative to the sleeve under the action of an external force, and a support seat (603) is provided at the end of the support rod, and the support seat (603) is used to support the vehicle.

5. The vehicle load test verification platform according to claim 4, characterized in that: The upper end surface of the support seat (603) is provided with a threaded hole with an opening facing upward, the threaded hole is threadedly connected with a screw rod (605), and a support plate (604) is fixedly provided at the top end of the screw rod (605).

6. The vehicle load test verification platform according to any one of claims 3 to 5, characterized in that: The test room is also provided with a flexible heat-insulating cover (7) and columns (8). The columns (8) have a plurality of columns and are arranged vertically at intervals in the outer area of ​​the pit. The flexible heat-insulating cover (7) is hung on the columns (8) by a pull rope (9) to form a heat-insulating space capable of accommodating the drum dynamometer assembly (1), the mobile loading assembly (2) and the vehicle.

7. The vehicle load test verification platform according to claim 6, characterized in that: The surface of the flexible heat-insulating cover (7) is provided with a hanging net (10), the nodes of the hanging net (10) are fixedly connected to the surface of the flexible heat-insulating cover (7), and one end of the pull rope (9) is fixedly connected to the hanging net (10).

8. The vehicle load test verification platform according to any one of claims 3 to 5, characterized in that: The test room is also provided with a traction pile (11), which has a plurality of traction piles (11) arranged vertically at intervals and is used to tow the front and rear of the vehicle respectively; the traction pile (11) is a vertical telescopic structure, which does not affect the vehicle's entry and exit when retracted into position, and can block the vehicle's entry and exit when extended into position.

9. The vehicle load test verification platform according to any one of claims 3 to 5, characterized in that: The test room is provided with a negative pressure suction device (12) for collecting vehicle exhaust gas; And / or, the output shaft of the drum dynamometer assembly (1) is connected to a kinetic energy recovery device; And / or, a floor (13) is detachably fixed to the open portion of the pit, and the floor (13) is used to cover the open portion of the pit.

10. A vehicle load testing method, characterized in that: Using the platform according to any one of claims 3 to 9, the testing method comprises: S100, confirming that the vehicle is located on the top of the lifting device, and controlling the lifting device to lift the vehicle until the tires of the vehicle are off the ground; S200, controlling the lifting device to move along the second track until the vehicle is located at the test station; controlling the first drum dynamometer assembly to move along the first track to approach or move away from the second drum dynamometer assembly; wherein the first drum dynamometer assembly is fixed to the pit, one of the front wheel and the rear wheel of the vehicle corresponds to the first drum dynamometer assembly, and the other corresponds to the second drum dynamometer assembly; S300, controlling the lifting device (6) to descend until one of the front wheel and the rear wheel of the vehicle falls on the first drum dynamometer assembly, and the other falls on the second drum dynamometer assembly.

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