A test bench for front axle assembly of agricultural machinery

Abstract

The present invention discloses a test bench for a front axle assembly of agricultural machinery, which relates to the technical field of agricultural machinery testing, and comprises a placement mechanism, wherein a lateral limiting mechanism and a vertical limiting mechanism are respectively fixedly connected to the upper part of the placement mechanism, wherein the lateral limiting mechanism is located on both sides of the vertical limiting mechanism, and adjustment mechanisms are arranged at both ends of the placement mechanism, wherein a loading mechanism is fixedly connected inside the adjustment mechanism, and a transmission mechanism is fixedly connected to the side of the adjustment mechanism. In the present invention, the diversified simulated road conditions and usage scenarios can more accurately reflect the performance of the front axle assembly in actual operation, and a large amount of data on the performance of the front axle assembly can be obtained through testing under various road conditions and usage scenarios, and these data can help R&D personnel to deeply analyze the working status of the front axle under different conditions, so as to improve the design, material selection and manufacturing process of the front axle in a targeted manner, accelerate the R&D speed of the enterprise, and reduce the cost of testing.

Description

Technical Field

[0001] The invention relates to the technical field of agricultural machinery testing, in particular to an agricultural machinery front axle assembly testing platform. Background Art

[0002] The agricultural machinery front axle assembly is a key component collection of the front part of agricultural machinery such as tractors and combine harvesters. It is a complex structure composed of multiple parts that work together to ensure that the agricultural machinery can travel and operate normally in the field or other work sites. The performance and quality of the agricultural machinery front axle assembly need to be tested during the production and processing. Testing it using an agricultural machinery front axle assembly test bench can simulate various working conditions of the agricultural machinery front axle in actual work, thereby comprehensively evaluating the quality, reliability and safety of the front axle assembly.

[0003] For example, the invention patent with publication number CN117906978A discloses "a tractor front axle assembly test bench", which includes a support base, the interior of which can store water, and a loading and unloading moving component is provided on the surface of the support base, which is used to drive the tractor front axle to complete loading and unloading operations.

[0004] However, in the prior art, agricultural machinery has a wide range of application scenarios, including field operations, orchard operations, mountain operations, etc. Different operation scenarios and functional requirements lead to the diversification of the design of agricultural machinery front axles, which will lead to innovations in the structure and shape of the front axles. This makes the design of agricultural machinery front axles diverse. The existing test benches can only test a single model of front axle assembly, whether it is the limit fixation of the front axle, or the power transmission of the front axle and the application of test loads. It cannot be used for testing different models of agricultural machinery front axles. In addition, when the existing test benches test the front axle assembly, the simulated use The situation is not sufficient, resulting in a single data collection and detection during the test of the front axle assembly, and the front axle assembly cannot be tested in multiple usage conditions on one test bench. As a result, when companies develop and manufacture different types of agricultural machinery front axles, they need to manufacture or purchase mutually compatible front axle assembly test benches, which increases the company's R&D and production costs. At the same time, in the process of developing agricultural machinery front axles, it is necessary to frequently test front axles of different design schemes. The poor versatility of the test bench will make the testing process in the R&D process complicated and slow, affecting the R&D progress and causing the company's technological level to lag behind in the R&D process. Summary of the invention

[0005] The purpose of the present invention is to provide a test bench for a front axle assembly of agricultural machinery to solve the problem that the test bench proposed in the above background technology can only test a single model of front axle assembly, whether it is the limiting and fixing of the front axle, or the power transmission of the front axle and the application of the test load, and cannot be used for testing different models of agricultural machinery front axles. In addition, when the existing test bench detects the front axle assembly, the simulated usage conditions are insufficient, resulting in a single data collection and detection during the test of the front axle assembly, and the front axle assembly cannot be tested in multiple usage conditions on one test bench.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solutions: a test bench for a front axle assembly of an agricultural machinery, comprising a placement mechanism, wherein a lateral limiting mechanism and a vertical limiting mechanism are respectively fixedly connected to the upper part of the placement mechanism, wherein the lateral limiting mechanism is located on both sides of the vertical limiting mechanism, and adjustment mechanisms are arranged at both ends of the placement mechanism, wherein a loading mechanism is fixedly connected inside the adjustment mechanism, and a transmission mechanism is fixedly connected to the side of the adjustment mechanism, wherein the lateral limiting mechanism is used to fix the side of the front axle assembly, wherein the adjustment mechanism is used to adjust the position of the loading mechanism, wherein the loading mechanism is used to provide a load for the front axle assembly test, and wherein the transmission mechanism is used to drive the front axle assembly to operate;

[0007] The loading mechanism comprises a No. 1 X-axis moving assembly, a moving end of the No. 1 X-axis moving assembly is fixedly connected to a No. 1 fixed plate, a telescopic rod is fixedly connected to the upper part of the No. 1 fixed plate, a No. 2 connecting plate is fixedly connected to the upper part of the telescopic rod, and a spring is arranged on the surface of the telescopic rod, one end of the spring is fixedly connected to the No. 1 fixed plate, and the other end of the spring is fixedly connected to the No. 2 connecting plate, a hydraulic jack is fixedly connected to the upper part of the No. 2 connecting plate, a connecting assembly is fixedly connected to the upper part of the hydraulic jack, a No. 1 loading wheel and a No. 2 loading wheel are fixedly connected to both sides of the connecting assembly, and a vibration motor is fixedly connected to the bottom of the No. 2 connecting plate;

[0008] The lateral limiting mechanism includes a No. 1 mounting frame, a wire block, a No. 2 guide rail and a clamp assembly, the No. 1 mounting frame is fixedly connected to a servo motor on the top, the output end of the servo motor is fixedly connected to a No. 1 adjusting screw, the No. 1 adjusting screw is rotatably connected to the No. 1 mounting frame, the wire block is threadedly connected to the No. 1 adjusting screw, and the top of the wire block is fixedly connected to a No. 1 connecting plate, the top of the No. 1 connecting plate is fixedly connected to a No. 1 connecting frame, the No. 1 connecting frame is fixedly connected to a No. 2 electro-hydraulic push rod inside, the end of the No. 2 electro-hydraulic push rod is fixedly connected to a push plate, the side of the push plate is installed with a connecting base, and the connecting A No. 1 pressure sensor is fixedly connected between the base and the push plate, the No. 2 guide rail is fixedly connected to the side of the push plate, and a No. 2 guide block is slidably connected inside the No. 2 guide rail, the clamp assembly includes multiple connecting rods, and the multiple connecting rods are combined into a folding frame through a connecting shaft, the connecting rods at both ends of the folding frame are rotatably connected to the connecting base respectively, and one end of the connecting rod in the middle of the folding frame is rotatably connected to the No. 2 guide block through the connecting shaft, and the other end of the connecting rod in the middle of the folding frame is rotatably connected to the chuck through the connecting shaft, a No. 1 clamping plate is fixedly connected to the side of the chuck, and an anti-slip rubber pad is fixedly connected to the side of the No. 1 clamping plate.

[0009] Preferably, the upper portion of the No. 1 mounting frame is fixedly connected to a No. 1 guide rail, the upper portion of the No. 1 guide rail is slidably connected to a No. 1 guide block, and the No. 1 guide block is fixedly connected to the bottom of the No. 1 connecting plate.

[0010] Preferably, the placement mechanism includes a support frame, a No. 1 electro-hydraulic push rod is fixedly connected to the upper portion of the support frame, and a front axle placement platform is fixedly connected to the upper portion of the No. 1 electro-hydraulic push rod.

[0011] Preferably, the vertical limiting mechanism includes a No. 2 connecting frame, a No. 3 electro-hydraulic push rod is fixedly connected to the lower portion of the No. 2 connecting frame, a No. 2 clamping plate is fixedly connected to the lower portion of the No. 3 electro-hydraulic push rod, and the No. 2 clamping plate is located above the front axle placement platform.

[0012] Preferably, the adjustment mechanism includes a No. 2 mounting frame, a reduction motor is fixedly connected to the side of the No. 2 mounting frame, a driving gear is fixedly connected to the output end of the reduction motor, the driving gear is rotatably connected to the inside of the No. 2 mounting frame, a No. 1 annular slide rail is fixedly connected to the upper part of the No. 2 mounting frame, a No. 1 annular slider is slidably connected to the inside of the No. 1 annular slide rail, a driven gear is fixedly connected to the surface of the No. 1 annular slider, the driven gear is meshed with the driving gear, and the upper part of the No. 1 annular slider is fixedly connected to the No. 1 X-axis moving assembly.

[0013] Preferably, the surface of the No. 1 annular slide rail is fixedly connected to a No. 1 fixing frame, the surface of the No. 1 fixing frame is fixedly connected to a cylinder, the end of the cylinder passes through the No. 1 fixing frame, and the end of the cylinder is fixedly connected to a limit plate, and the limit plate is meshed with the driven gear.

[0014] Preferably, the connecting assembly includes a No. 3 connecting plate, a No. 4 connecting plate is installed on the upper part of the No. 3 connecting plate, a No. 2 pressure sensor is fixedly connected between the No. 4 connecting plate and the No. 3 connecting plate, a mounting shaft is rotatably connected to the upper part of the No. 4 connecting plate, the No. 1 loading wheel and the No. 2 loading wheel are respectively fixedly connected to the two ends of the mounting shaft, a protrusion is provided on the surface of the No. 1 loading wheel, a No. 3 guide rail is fixedly connected to the upper part of the No. 2 connecting plate, a No. 3 guide block is slidably connected inside the No. 3 guide rail, and the No. 3 guide block is fixedly connected to the side of the No. 3 connecting plate.

[0015] Preferably, the transmission mechanism comprises a No. 3 mounting frame, a connecting universal joint, a No. 2 fixing plate, a No. 1 fixing bolt and a No. 2 fixing bolt, the No. 3 mounting frame is fixedly connected to the side surface of the No. 2 mounting frame, and the upper portion of the No. 3 mounting frame is fixedly connected to the No. 2 X-axis moving assembly, the moving end of the No. 2 X-axis moving assembly is fixedly connected to the driving motor, one end of the connecting universal joint is fixedly connected to the output end of the driving motor, and the other end of the connecting universal joint is fixedly connected to the No. 2 fixing plate, the No. 2 fixing plate side is fixedly connected to the No. 2 annular slide rail, the No. 2 annular slide rail is slidably connected to the No. 2 annular slider, the No. 2 annular slider is fixedly connected to the No. 4 guide rail on the side surface, the No. 4 guide rail is slidably connected to the No. 4 guide block, the No. 4 guide block is fixedly connected to the No. 2 fixing frame on the side surface, the No. 2 fixing frame is plugged with a fixing block, the fixing block side is fixedly connected to the mounting bolt, the No. 1 fixing bolt penetrates the surface of the No. 2 annular slide rail and is threadedly connected to the No. 2 annular slider, and the No. 2 fixing bolt penetrates the No. 2 fixing frame and is threadedly connected to the fixed block.

[0016] Preferably, the No. 4 guide block is internally threadedly connected to a No. 2 adjusting screw, one end of the No. 2 adjusting screw penetrates the surface of the No. 4 guide rail, and the No. 2 adjusting screw is rotatably connected to the No. 4 guide rail, the No. 2 fixed plate is fixedly connected to a No. 3 annular slide rail on the side, the No. 3 annular slide rail is internally slidably connected to a No. 3 annular slider, and the No. 3 annular slider is fixedly connected to the No. 4 guide rail on the side.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. In the present invention, the loading mechanism is used to simulate the driving of the front axle assembly on a flat road surface and a bumpy road surface with a load, and then the adjusting mechanism drives the loading mechanism to adjust the angle, so that the No. 1 loading wheel and the No. 2 loading wheel perform loading tests on the front axle assembly in multiple directions, simulating the test conditions of the front axle assembly during uphill and downhill processes, thereby fully testing the front axle assembly. The diverse simulated road conditions and usage scenarios can more accurately reflect the performance of the front axle assembly in actual operations. Through testing under various road conditions and usage scenarios, a large amount of data on the performance of the front axle assembly can be obtained. These data can help R&D personnel to deeply analyze the working status of the front axle under different conditions, so as to improve the design, material selection and manufacturing process of the front axle in a targeted manner, accelerate the R&D speed of the enterprise, and reduce the cost of testing.

[0019] 2. In the present invention, the side of the front axle assembly is fixed by a lateral limiting mechanism. During the fixing process, when the side of the front axle assembly is not a planar structure, the anti-slip rubber pad and the No. 1 clamping plate in the clamp assembly clamp and fix the side of the front axle assembly in a sequence. The No. 1 clamping plate that first clamps the front axle assembly in the clamp assembly will adjust the position of the remaining No. 1 clamping plates under the action of thrust, so that front axle assemblies of different shapes can be stably limited and fixed. By stably fixing different types of agricultural machinery front axle assemblies, it can be ensured that the measured data accurately and comprehensively reflects the performance of the front axle in terms of testing, so that the test bench can be compatible with more types of agricultural machinery front axle assemblies, improve the utilization rate and test efficiency of the test bench, and expand the test scope.

[0020] 3. In the present invention, before the mounting bolts are plugged and installed with the wheel hub mounting flange and the wheel hub, suitable mounting bolts are selected first, and then according to the distribution position of the mounting holes of the wheel hub mounting flange of the front axle assembly to be tested, the No. 4 guide block is driven to slide along the No. 4 guide rail by rotating the No. 2 adjusting screw, and then the No. 2 annular slider is driven to slide along the No. 2 annular slide rail, so as to adjust the position of the mounting bolts. By adjusting the position of the mounting bolts, the transmission mechanism can be adapted to different types of front axle assemblies, which can improve the utilization rate of the test equipment, reduce the test cost, meet the diverse test needs, and accelerate the research and development and production of agricultural machinery front axles.

[0021] 4. In the present invention, when the adjusting mechanism adjusts the angle of the loading mechanism, the driving gear is driven to rotate by the reduction motor. At this time, the driving gear drives the driven gear and the No. 1 annular slider to rotate, thereby adjusting the angle of the loading mechanism. After the angle of the loading mechanism is adjusted appropriately, the cylinder pushes the limit plate to engage with the driven gear, and the driven gear is limited and fixed, thereby fixing the position of the loading mechanism, which is convenient for adjusting the position of the loading mechanism. During the test, the front axle of the agricultural machinery is subjected to multi-directional side loading tests, which can fully simulate the various lateral forces that the agricultural machinery is subjected to under complex actual working conditions, thereby accurately evaluating the key performance indicators of the front axle such as strength, stiffness, stability, and fatigue resistance, and can also effectively discover potential structural design and material problems, which is helpful to optimize the design of the front axle and improve its safety and reliability in different operating scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a first three-dimensional structural schematic diagram of a test bench for a front axle assembly of an agricultural machinery according to the present invention;

[0023] Figure 2 It is a second three-dimensional structural schematic diagram of a test bench for a front axle assembly of an agricultural machinery according to the present invention;

[0024] Figure 3 It is a side structural schematic diagram of a test bench for the front axle assembly of agricultural machinery according to the present invention;

[0025] Figure 4 It is a schematic diagram of the connection structure of the adjustment mechanism and the loading mechanism in a test bench for the front axle assembly of an agricultural machinery according to the present invention;

[0026] Figure 5 It is a three-dimensional structural schematic diagram of a loading mechanism in a test bench for a front axle assembly of an agricultural machinery according to the present invention;

[0027] Figure 6 It is a three-dimensional structural schematic diagram of a first loading wheel and a second loading wheel in a test bench for a front axle assembly of an agricultural machinery according to the present invention;

[0028] Figure 7 It is a schematic diagram of the cross-sectional side view of the connecting component in a test bench for the front axle assembly of an agricultural machinery according to the present invention;

[0029] Figure 8 It is a schematic diagram of the angle adjustment process of a loading mechanism in a test bench for a front axle assembly of an agricultural machinery according to the present invention;

[0030] Fig. 9 It is a three-dimensional structural schematic diagram of a vertical limiting mechanism in a test bench for a front axle assembly of an agricultural machinery according to the present invention;

[0031] Fig.10 It is a cross-sectional three-dimensional structural schematic diagram of a No. 1 connecting frame in a test bench for a front axle assembly of an agricultural machinery according to the present invention;

[0032] Fig.11 It is a three-dimensional structural schematic diagram of a fixture assembly in a test bench for a front axle assembly of an agricultural machinery according to the present invention;

[0033] Fig.12 It is a three-dimensional structural schematic diagram of a transmission mechanism in a test bench for a front axle assembly of an agricultural machinery according to the present invention;

[0034] Fig.13 It is a schematic diagram of the three-dimensional structure of a No. 2 annular slide rail in a test bench for a front axle assembly of an agricultural machinery according to the present invention;

[0035] Fig.14 The present invention is a schematic diagram of a process for adjusting the position of mounting bolts in a test bench for a front axle assembly of an agricultural machinery.

[0036] In the figure: 1, placement mechanism; 11, support frame; 12, No. 1 electro-hydraulic push rod; 13, front axle placement platform; 2, lateral limit mechanism; 21, No. 1 mounting frame; 22, No. 1 guide rail; 23, No. 1 guide block; 24, No. 1 connecting plate; 25, servo motor; 26, No. 1 adjusting screw rod; 27, screw block; 28, No. 1 connecting frame; 29, No. 2 electro-hydraulic push rod; 210, push plate; 211, No. 1 pressure sensor; 212, connecting base; 213, fixture assembly; 214, Connecting rod; 215, chuck; 216, guide rail No. 2; 217, guide block No. 2; 218, clamping plate No. 1; 219, anti-skid rubber pad; 3, vertical limit mechanism; 31, connecting frame No. 2; 32, electro-hydraulic push rod No. 3; 33, clamping plate No. 2; 4, adjustment mechanism; 41, mounting frame No. 2; 42, reduction motor; 43, driving gear; 44, annular slide rail No. 1; 45, annular slide block No. 1; 46, driven gear; 47, fixing frame No. 1; 48, cylinder; 49, limit plate; 5, loading mechanism; 51, No. 1 X-axis moving assembly; 52, No. 1 fixed plate; 53, telescopic rod; 54, spring; 55, No. 2 connecting plate; 56, vibration motor; 57, hydraulic jack; 58, connecting assembly; 59, No. 3 connecting plate; 510, No. 2 pressure sensor; 511, No. 4 connecting plate; 512, mounting shaft; 513, No. 3 guide rail; 514, No. 3 guide block; 515, No. 1 loading wheel; 516, No. 2 loading wheel; 6, transmission mechanism; 6 1. Mounting frame No. 3; 62. X-axis moving assembly No. 2; 63. Driving motor; 64. Connecting universal joint; 65. Fixing plate No. 2; 66. Annular slide rail No. 2; 67. Annular slider No. 2; 68. Fixing bolt No. 1; 69. Annular slide rail No. 3; 610. Annular slider No. 3; 611. Guide rail No. 4; 612. Guide block No. 4; 613. Adjusting screw No. 2; 614. Fixing frame No. 2; 615. Fixing block; 616. Fixing bolt No. 2; 617. Mounting bolt. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the implementation regulations described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] Example 1: Reference Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown: a test bench for a front axle assembly of agricultural machinery, comprising a placing mechanism 1, a lateral limiting mechanism 2 and a vertical limiting mechanism 3 are fixedly connected to the upper part of the placing mechanism 1, the lateral limiting mechanism 2 is located on both sides of the vertical limiting mechanism 3, an adjusting mechanism 4 is arranged at both ends of the placing mechanism 1, a loading mechanism 5 is fixedly connected inside the adjusting mechanism 4, and a transmission mechanism 6 is fixedly connected to the side of the adjusting mechanism 4, the lateral limiting mechanism 2 is used to fix the side of the front axle assembly, the adjusting mechanism 4 is used to adjust the position of the loading mechanism 5, the loading mechanism 5 is used to provide a load for the front axle assembly test, and the transmission mechanism 6 is used to drive the front axle assembly to operate.

[0039] The loading mechanism 5 includes a No. 1 X-axis moving component 51, the bottom of the No. 1 X-axis moving component 51 is fixedly connected to the No. 1 annular slider 45 in the adjustment mechanism 4, and the moving end of the No. 1 X-axis moving component 51 is fixedly connected to a No. 1 fixed plate 52, the upper part of the No. 1 fixed plate 52 is fixedly connected to a telescopic rod 53, the upper part of the telescopic rod 53 is fixedly connected to a No. 2 connecting plate 55, and a spring 54 is arranged on the surface of the telescopic rod 53, one end of the spring 54 is fixedly connected to the No. 1 fixed plate 52, and the other end of the spring 54 is fixedly connected to the No. 2 connecting plate 55, the upper part of the No. 2 connecting plate 55 is fixedly connected to a hydraulic jack 57, the upper part of the hydraulic jack 57 is fixedly connected to a connecting component 58, the two sides of the connecting component 58 are respectively fixedly connected to the No. 1 loading wheel 515 and the No. 2 loading wheel 516, and the bottom of the No. 2 connecting plate 55 is fixedly connected to a vibration motor 56. The connecting assembly 58 includes a No. 3 connecting plate 59, a No. 4 connecting plate 511 is installed on the upper part of the No. 3 connecting plate 59, a No. 2 pressure sensor 510 is fixedly connected between the No. 4 connecting plate 511 and the No. 3 connecting plate 59, a mounting shaft 512 is rotatably connected to the upper part of the No. 4 connecting plate 511, a No. 1 loading wheel 515 and a No. 2 loading wheel 516 are respectively fixedly connected to the two ends of the mounting shaft 512, a protrusion is provided on the surface of the No. 1 loading wheel 515, a No. 3 guide rail 513 is fixedly connected to the upper part of the No. 2 connecting plate 55, a No. 3 guide block 514 is slidably connected inside the No. 3 guide rail 513, and the No. 3 guide block 514 is fixedly connected to the side of the No. 3 connecting plate 59.

[0040] In this embodiment, the hydraulic jack 57 is used to lift the connecting assembly 58 upward, so that the second loaded wheel 516 contacts the bottom of the wheel of the front axle assembly. As the hydraulic jack 57 is continuously lifted, the pressure on the end of the front axle assembly is continuously increased, thereby simulating the situation that the front axle assembly bears load on a flat road. At the same time, a strain gauge is installed on the surface of the front axle assembly to test the deformation of the front axle assembly when bearing load. At the same time, the driving of the transmission mechanism 6 is coordinated to simulate the situation that the front axle assembly bears load and travels. Various performances of the front axle assembly are tested by various external sensors. For example, a temperature sensor is used to detect the temperature of the rotating parts of the front axle assembly to determine whether the friction of the rotating parts is too large and whether the lubrication and heat dissipation performance inside the rotating parts are qualified.

[0041] The No. 1 loading wheel 515 is moved to the bottom of the wheel of the front axle assembly by the No. 1 X-axis moving component 51, and then the load is applied to the front axle assembly in the above manner. The wheel of the front axle assembly will drive the No. 1 loading wheel 515 to rotate during the rotation. At this time, the bumps on the surface of the No. 1 loading wheel 515 can simulate the situation of the front axle assembly driving on a bumpy road, thereby increasing the diversity of the simulated environment of the front axle assembly during the test. Vibration is applied to the front axle assembly by the vibration motor 56, which can increase the vibration amplitude of the front axle assembly during driving, thereby improving the test range of the front axle assembly.

[0042] Then, the adjusting mechanism 4 drives the loading mechanism 5 to adjust the angle, so that the No. 1 loading wheel 515 and the No. 2 loading wheel 516 perform loading tests on the front axle assembly in multiple directions, simulating the testing conditions of the front axle assembly during uphill and downhill processes, thereby fully testing the front axle assembly. When the loading mechanism 5 performs loading tests on the front axle assembly, the hydraulic jack 57 pushes the connecting assembly 58 to move. At this time, the No. 3 guide block 514 slides along the No. 3 guide rail 513 to limit the movement of the No. 3 connecting plate 59, thereby improving the stability of the movement of the No. 3 connecting plate 59. The pressure loaded by the No. 2 pressure sensor 510 is monitored to facilitate the adjustment of the loaded load.

[0043] Embodiment 2: According to Figure 1 , Figure 2 , Figure 3 , Fig. 9 , Fig.10 and Fig.11As shown, the lateral limiting mechanism 2 includes a No. 1 mounting frame 21, a thread block 27, a No. 2 guide rail 216 and a clamp assembly 213. The No. 1 mounting frame 21 is fixedly connected to a servo motor 25 on the upper part, and the output end of the servo motor 25 is fixedly connected to a No. 1 adjusting screw rod 26. The No. 1 adjusting screw rod 26 is rotatably connected to the No. 1 mounting frame 21. The thread block 27 is threadedly connected to the No. 1 adjusting screw rod 26, and the No. 1 connecting plate 24 is fixedly connected to the No. 1 connecting plate 24 on the upper part. A No. 1 connecting frame 28 is fixedly connected to the No. 1 connecting frame 28. A No. 2 electro-hydraulic push rod 29 is fixedly connected inside the connecting frame 28, and a push plate 210 is fixedly connected to the end of the No. 2 electro-hydraulic push rod 29. A connecting base 212 is installed on the side of the push plate 210. A No. 1 pressure sensor 211 is fixedly connected between the connecting base 212 and the push plate 210. A No. 2 guide rail 216 is fixedly connected to the side of the push plate 210, and a No. 2 guide block 217 is slidably connected inside the No. 2 guide rail 216. The clamp assembly 213 includes a plurality of connecting rods 214, and the plurality of connecting rods 214 are connected by a connecting shaft assembly. The folding frame is formed into a folding frame, the connecting rods 214 at both ends of the folding frame are rotatably connected to the connecting base 212 respectively, and one end of the connecting rod 214 in the middle of the folding frame is rotatably connected to the second guide block 217 through a connecting shaft, and the other end of the connecting rod 214 in the middle of the folding frame is rotatably connected to the clamp 215 through a connecting shaft, and the side of the clamp 215 is fixedly connected to the first clamp plate 218, and the side of the first clamp plate 218 is fixedly connected to the non-slip rubber pad 219, and the upper part of the No. 1 mounting frame 21 is fixedly connected to the No. 1 guide rail 22, and the upper part of the No. 1 guide rail 22 is slidable. It is dynamically connected with a guide block No. 1 23, which is fixedly connected to the bottom of a connecting plate No. 1 24. The placement mechanism 1 includes a support frame 11, an upper portion of the support frame 11 is fixedly connected with an electro-hydraulic push rod No. 12, an upper portion of the electro-hydraulic push rod No. 12 is fixedly connected with a front axle placement platform 13, and a vertical limiting mechanism 3 includes a connecting frame No. 2 31, a lower portion of the connecting frame No. 2 31 is fixedly connected with an electro-hydraulic push rod No. 32, a lower portion of the electro-hydraulic push rod No. 32 is fixedly connected with a second splint 33, and the second splint 33 is located above the front axle placement platform 13.

[0044] In this embodiment, the front axle assembly is placed on the upper part of the front axle placement platform 13, and the two ends are in a suspended state. According to the different heights of the front axle assembly, the front axle placement platform 13 is raised and lowered by the No. 1 electro-hydraulic push rod 12 so that the wheel hub mounting flanges at both ends of the front axle assembly are at an adaptive height with the transmission mechanism 6, and then the side of the front axle assembly is fixed by the lateral limiting mechanism 2. During the fixing process, the No. 1 adjusting screw 26 is driven by the servo motor 25 to rotate, thereby driving the screw block 27, the No. 1 connecting plate 24 and the components on the upper part thereof to move, so that the anti-skid rubber pad 219 is fitted with the side of the front axle assembly, and then the No. 2 electro-hydraulic push rod 29 pushes the push plate 210, thereby pushing the No. 1 clamping plate 218 and the anti-skid rubber pad 219 to limit and fix the side of the front axle assembly. In the process of the push plate 210 pushing the No. 1 clamping plate 218 to limit and fix the side of the front axle assembly, when the side of the front axle assembly is not a plane structure When the front axle assembly is in the structure, the anti-skid rubber pad 219 and the first clamping plate 218 in the clamp assembly 213 clamp and fix the side of the front axle assembly in a sequence. The anti-skid rubber pad 219 that first contacts the surface of the front axle assembly in the clamp assembly 213 will transfer pressure to the end of the connecting rod 214 under the continuous pushing action of the push plate 210. At this time, the end of the connecting rod 214 connected to the second guide block 217 will push the second guide block 217 to slide along the second guide rail 216, and push the remaining first clamping plate 218 and anti-skid rubber pad 219 that are not fixed to the side of the front axle assembly, so that each anti-skid rubber pad 219 and the first clamping plate 218 in the clamp assembly 213 have an extrusion and clamping effect on the side of the front axle assembly. The clamp assembly 213 can adjust itself under the pushing pressure, so that the front axle assemblies of different shapes can be stably limited and fixed.

[0045] The servo motor 25 drives the No. 1 adjusting screw rod 26 to rotate, so that the screw block 27 drives the upper structure to move, thereby increasing the stroke of the No. 1 connecting frame 28 to limit the front axle assembly, thereby increasing the overall applicability of the side limit of different front axle assemblies, and improving the versatility of the lateral limit mechanism 2. During the movement of the No. 1 connecting plate 24, the No. 1 guide block 23 slides along the No. 1 guide rail 22 to limit the movement of the No. 1 connecting plate 24, thereby improving the stability of the No. 1 connecting plate 24 and its upper mechanism during movement and operation. The clamping force on both sides of the front axle assembly is monitored by the No. 1 pressure sensor 211 to avoid the front axle being loosely fixed due to insufficient clamping pressure, and then the No. 2 clamping plate 33 is pushed by the No. 3 electro-hydraulic push rod 32 to limit and fix the upper part of the front axle assembly, so that the front axle assembly remains stable during the test.

[0046] When the side surfaces of the front axle assembly are limited and fixed by the lateral limiting mechanisms 2 on both sides of the placement mechanism 1, the horizontal position of the front axle assembly on the upper part of the front axle placement platform 13 can be adjusted by the cooperation and pushing of the two lateral limiting mechanisms 2 on the side surfaces of the front axle assembly. Through the cooperation of the placement mechanism 1 and the lateral limiting mechanisms 2, the fixed position of the front axle assembly is adapted to the transmission mechanism 6, which facilitates the subsequent installation and connection of the transmission mechanism 6 with the front axle assembly.

[0047] Embodiment 3: According to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 8 As shown, the adjustment mechanism 4 includes a No. 2 mounting frame 41, a reduction motor 42 is fixedly connected to the side of the No. 2 mounting frame 41, a driving gear 43 is fixedly connected to the output end of the reduction motor 42, and the driving gear 43 is rotatably connected to the inside of the No. 2 mounting frame 41, a No. 1 annular slide rail 44 is fixedly connected to the upper part of the No. 2 mounting frame 41, a No. 1 annular slider 45 is slidably connected to the inside of the No. 1 annular slider 44, a driven gear 46 is fixedly connected to the surface of the No. 1 annular slider 45, and the driven gear 46 is meshed with the driving gear 43, and the upper part of the No. 1 annular slider 45 is fixedly connected to the No. 1 X-axis moving assembly 51, a No. 1 fixed frame 47 is fixedly connected to the surface of the No. 1 annular slide rail 44, a cylinder 48 is fixedly connected to the surface of the No. 1 fixed frame 47, and the end of the cylinder 48 passes through the No. 1 fixed frame 47, and the end of the cylinder 48 is fixedly connected to a limit plate 49, and the limit plate 49 is meshed with the driven gear 46.

[0048] In this embodiment, when the angle of the loading mechanism 5 is adjusted by the adjustment mechanism 4, the driving gear 43 is driven to rotate by the reduction motor 42. At this time, the driving gear 43 drives the driven gear 46 and the first annular slider 45 to rotate, thereby adjusting the angle of the loading mechanism 5. After the angle of the loading mechanism 5 is adjusted appropriately, the limit plate 49 is pushed by the cylinder 48 to engage with the driven gear 46, and the driven gear 46 is limited and fixed, thereby fixing the position of the loading mechanism 5, which is convenient for adjusting the position of the loading mechanism 5 and fixing the position of the loading mechanism 5.

[0049] Embodiment 4: According to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Fig.12 , Fig.13 and Fig.14As shown, the transmission mechanism 6 includes a No. 3 mounting frame 61, a connecting universal joint 64, a No. 2 fixing plate 65, a No. 1 fixing bolt 68 and a No. 2 fixing bolt 616. The No. 3 mounting frame 61 is fixedly connected to the side of the No. 2 mounting frame 41, and the No. 3 mounting frame 61 is fixedly connected to the upper part of the No. 3 mounting frame 61. The moving end of the No. 2 X-axis moving assembly 62 is fixedly connected to the driving motor 63. One end of the connecting universal joint 64 is fixedly connected to the output end of the driving motor 63, and the other end of the connecting universal joint 64 is fixedly connected to the No. 2 fixing plate 65. A No. 2 annular slide rail 66 is fixedly connected to the side of the No. 2 fixing plate 65. A No. 2 annular slider 67 is slidably connected to the inside of the No. 2 annular slider 66. A No. 4 guide rail 611 is fixedly connected to the side of the No. 2 annular slider 67. A No. 4 guide rail 611 is slidably connected to the inside of the No. 4 guide rail 611. A No. 4 guide block 612 is slidably connected to the inside of the No. 4 guide rail 611. The side of the No. 2 guide block 612 is fixedly connected to the No. 2 fixing frame 614, and the No. 2 fixing frame 614 is inserted with a fixing block 615, and the side of the fixing block 615 is fixedly connected with a mounting bolt 617, the No. 1 fixing bolt 68 passes through the surface of the No. 2 annular slide rail 66 and is threadedly connected to the No. 2 annular slider 67, the No. 2 fixing bolt 616 passes through the No. 2 fixing frame 614 and is threadedly connected to the fixing block 615, the No. 4 guide block 612 is internally threadedly connected with the No. 2 adjusting screw rod 613, one end of the No. 2 adjusting screw rod 613 passes through the surface of the No. 4 guide rail 611, and the No. 2 adjusting screw rod 613 is rotatably connected to the No. 4 guide rail 611, the side of the No. 2 fixing plate 65 is fixedly connected to the No. 3 annular slide rail 69, the No. 3 annular slider 610 is slidably connected inside the No. 3 annular slide rail 69, and the side of the No. 3 annular slider 610 is fixedly connected to the No. 4 guide rail 611.

[0050] In this embodiment, after the front axle assembly is installed and fixed, the second X-axis moving component 62 drives the drive motor 63 and the mechanism installed at its end to move, the mounting bolts 617 are plugged into the wheel hub and the wheel hub mounting flange of the front axle assembly, and then the transmission mechanism 6 is fixedly connected to the wheel hub mounting flange of the front axle assembly using nuts, and the wheel hub and the wheel are fixed at the same time. At the same time, the drive motor 63 drives the connecting universal joint 64 to rotate, thereby driving the second fixing plate 65 and its surface fixing structure to rotate, and then driving the wheel of the front axle assembly and its internal structure to be tested to rotate;

[0051] Before the mounting bolts 617 are plugged and installed with the wheel hub mounting flange and the wheel hub, according to the different front axle assemblies, suitable mounting bolts 617 are selected, plugged with the second fixing frame 614 through the fixing block 615, and then installed and fixed by the second fixing bolt 616, so as to facilitate the rapid installation and fixation of the suitable mounting bolts 617. According to the distribution position of the mounting holes of the wheel hub mounting flange of the front axle assembly to be tested, the fourth guide block 612 is driven to slide along the fourth guide rail 611 by rotating the second adjusting screw rod 613, and then the second annular slider 67 is slid along the second annular slide rail 66, so as to adjust the position of the mounting bolts 617. By adjusting the position of the mounting bolts 617, the transmission mechanism 6 can be adapted to different types of front axle assemblies;

[0052] When testing the front axle assembly, a vibration sensor is installed on the wheel hub or shaft of the front axle assembly, and the wheels of the front axle are driven to rotate through the transmission mechanism 6. The vibration of the front axle assembly under no-load conditions is tested, and the balance of the rotating parts of the front axle assembly is judged based on the vibration conditions. At the same time, it is directly observed whether there is sticking, abnormal noise, etc. in the cooperation between the transmission parts.

[0053] The use method and working principle of the device are as follows: the front axle assembly is placed on the upper part of the front axle placement platform 13, and both ends are in a suspended state. According to the height of the front axle assembly, the front axle placement platform 13 is raised and lowered by the No. 1 electro-hydraulic push rod 12 so that the wheel hub mounting flanges at both ends of the front axle assembly and the transmission mechanism 6 are at an adaptive height, and then the side of the front axle assembly is fixed by the lateral limit mechanism 2;

[0054] After the front axle assembly is installed and fixed, the drive motor 63 and the mechanism installed at its end are driven to move by the No. 2 X-axis moving component 62, and the mounting bolts 617 are plugged into the wheel hub and the wheel hub mounting flange of the front axle assembly. The transmission mechanism 6 is fixedly connected to the wheel hub mounting flange of the front axle assembly using nuts, and the wheel hub and the wheel are fixed at the same time. At the same time, the drive motor 63 drives the connecting universal joint 64 to rotate, thereby driving the No. 2 fixing plate 65 and its surface fixing structure to rotate, and then driving the wheel of the front axle assembly and its internal structure to be tested to rotate;

[0055] Subsequently, the hydraulic jack 57 is used to lift the connecting assembly 58 upward, so that the second loaded wheel 516 contacts the bottom of the wheel of the front axle assembly. As the hydraulic jack 57 is continuously lifted, the pressure on the end of the front axle assembly is continuously increased, thereby simulating the situation that the front axle assembly is subjected to load on a flat road. At the same time, a strain gauge is installed on the surface of the front axle assembly to test the deformation of the front axle assembly when subjected to load, and at the same time, the driving of the transmission mechanism 6 is cooperated to simulate the situation that the front axle assembly is subjected to load and travels;

[0056] The No. 1 loading wheel 515 is moved to the bottom of the wheel of the front axle assembly by the No. 1 X-axis moving component 51, and then the load is applied to the front axle assembly in the above manner. The wheel of the front axle assembly will drive the No. 1 loading wheel 515 to rotate during the rotation. At this time, the bumps on the surface of the No. 1 loading wheel 515 can simulate the situation of the front axle assembly driving on a bumpy road, thereby increasing the diversity of the simulated environment of the front axle assembly during the test. Vibration is applied to the front axle assembly by the vibration motor 56, which can increase the vibration amplitude of the front axle assembly during driving.

[0057] The driving gear 43 is driven to rotate by the reduction motor 42, and at this time, the driving gear 43 drives the driven gear 46 and the first annular slider 45 to rotate, so as to adjust the angle of the loading mechanism 5. After the angle of the loading mechanism 5 is adjusted appropriately, the limit plate 49 is pushed by the cylinder 48 to engage with the driven gear 46, and the driven gear 46 is limited and fixed, thereby fixing the position of the loading mechanism 5, and the loading mechanism 5 is driven to adjust the angle by the adjustment mechanism 4, so that the first loading wheel 515 and the second loading wheel 516 are subjected to loading tests on multiple directions of the front axle assembly, simulating the test conditions of the front axle assembly during uphill and downhill processes.

[0058] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A test bench for a front axle assembly of an agricultural machinery, comprising a placement mechanism (1), wherein the upper portion of the placement mechanism (1) is respectively fixedly connected to a lateral limiting mechanism (2) and a vertical limiting mechanism (3), wherein the lateral limiting mechanism (2) is located on both sides of the vertical limiting mechanism (3), and adjustment mechanisms (4) are provided at both ends of the placement mechanism (1), wherein a loading mechanism (5) is fixedly connected inside the adjustment mechanism (4), and a transmission mechanism (6) is fixedly connected to the side of the adjustment mechanism (4), wherein: The lateral limiting mechanism (2) is used to fix the side of the front axle assembly, the adjusting mechanism (4) is used to adjust the position of the loading mechanism (5), the loading mechanism (5) is used to provide a load for testing the front axle assembly, and the transmission mechanism (6) is used to drive the front axle assembly to operate; The loading mechanism (5) comprises a No. 1 X-axis moving assembly (51), a moving end of the No. 1 X-axis moving assembly (51) is fixedly connected to a No. 1 fixed plate (52), a telescopic rod (53) is fixedly connected to the upper part of the No. 1 fixed plate (52), a No. 2 connecting plate (55) is fixedly connected to the upper part of the telescopic rod (53), a spring (54) is arranged on the surface of the telescopic rod (53), one end of the spring (54) is fixedly connected to the No. 1 fixed plate (52), and the other end of the spring (54) is fixedly connected to the No. 2 connecting plate (55), a hydraulic jack (57) is fixedly connected to the upper part of the No. 2 connecting plate (55), a connecting assembly (58) is fixedly connected to the upper part of the hydraulic jack (57), two sides of the connecting assembly (58) are respectively fixedly connected to the No. 1 loading wheel (515) and the No. 2 loading wheel (516), and a vibration motor (56) is fixedly connected to the bottom of the No. 2 connecting plate (55); The lateral limiting mechanism (2) comprises a No. 1 mounting frame (21), a thread block (27), a No. 2 guide rail (216) and a clamp assembly (213); the No. 1 mounting frame (21) is fixedly connected to the upper portion thereof with a servo motor (25); the output end of the servo motor (25) is fixedly connected to a No. 1 adjusting screw rod (26); the No. 1 adjusting screw rod (26) is rotatably connected to the No. 1 mounting frame (21); the thread block (27) is threadedly connected to the No. 1 adjusting screw rod (26); the upper portion of the thread block (27) is fixedly connected to a No. 1 connecting plate (24); the upper portion of the No. 1 connecting plate (24) is fixedly connected to a No. 1 connecting frame (28); the No. 1 connecting frame (28) is fixedly connected to a No. 2 electro-hydraulic push rod (29); the end of the No. 2 electro-hydraulic push rod (29) is fixedly connected to a push plate (210); a connecting base (212) is installed on the side of the push plate (210); the connecting base A No. 1 pressure sensor (211) is fixedly connected between the push plate (212) and the push plate (210), the No. 2 guide rail (216) is fixedly connected to the side of the push plate (210), and the No. 2 guide rail (216) is slidably connected to the inside of the No. 2 guide rail (216), and the clamp assembly (213) includes a plurality of connecting rods (214), and the plurality of connecting rods (214) are combined into a folding frame through a connecting shaft, and the connecting rods (214) at both ends of the folding frame are rotatably connected to the connecting base (212), and one end of the connecting rod (214) in the middle of the folding frame is rotatably connected to the No. 2 guide block (217) through the connecting shaft, and the other end of the connecting rod (214) in the middle of the folding frame is rotatably connected to the clamp (215) through the connecting shaft, and the No. 1 clamp (218) is fixedly connected to the side of the clamp (215), and the No. 1 clamp (218) is fixedly connected to the side of the anti-skid rubber pad (219).

2. The agricultural machinery front axle assembly test bench according to claim 1, characterized in that: The No. 1 mounting frame (21) is fixedly connected to the top of a No. 1 guide rail (22), the No. 1 guide rail (22) is slidably connected to the top of a No. 1 guide block (23), and the No. 1 guide block (23) is fixedly connected to the bottom of a No. 1 connecting plate (24).

3. The agricultural machinery front axle assembly test bench according to claim 1, characterized in that: The placement mechanism (1) comprises a support frame (11), the upper portion of the support frame (11) being fixedly connected to a first electro-hydraulic push rod (12), and the upper portion of the first electro-hydraulic push rod (12) being fixedly connected to a front axle placement platform (13).

4. The agricultural machinery front axle assembly test bench according to claim 1, characterized in that: The vertical limiting mechanism (3) comprises a No. 2 connecting frame (31), a No. 3 electro-hydraulic push rod (32) being fixedly connected to the lower portion of the No. 2 connecting frame (31), a No. 2 clamping plate (33) being fixedly connected to the lower portion of the No. 3 electro-hydraulic push rod (32), and the No. 2 clamping plate (33) being located above the front axle placement platform (13).

5. The agricultural machinery front axle assembly test bench according to claim 1, characterized in that: The adjustment mechanism (4) comprises a No. 2 mounting frame (41), a reduction motor (42) is fixedly connected to the side of the No. 2 mounting frame (41), an output end of the reduction motor (42) is fixedly connected to a driving gear (43), the driving gear (43) is rotatably connected to the inside of the No. 2 mounting frame (41), a No. 1 annular slide rail (44) is fixedly connected to the top of the No. 2 mounting frame (41), a No. 1 annular slide rail (44) is slidably connected to the inside of the No. 1 annular slide rail (44), a driven gear (46) is fixedly connected to the surface of the No. 1 annular slide rail (45), the driven gear (46) is meshed with the driving gear (43), and the top of the No. 1 annular slide rail (45) is fixedly connected to a No. 1 X-axis moving assembly (51).

6. The agricultural machinery front axle assembly test bench according to claim 5, characterized in that: The surface of the No. 1 annular slide rail (44) is fixedly connected to a No. 1 fixing frame (47), the surface of the No. 1 fixing frame (47) is fixedly connected to a cylinder (48), the end of the cylinder (48) passes through the No. 1 fixing frame (47), and the end of the cylinder (48) is fixedly connected to a limit plate (49), and the limit plate (49) is meshed with the driven gear (46).

7. The agricultural machinery front axle assembly test bench according to claim 1, characterized in that: The connection assembly (58) comprises a No. 3 connection plate (59), a No. 4 connection plate (511) is mounted on the top of the No. 3 connection plate (59), a No. 2 pressure sensor (510) is fixedly connected between the No. 4 connection plate (511) and the No. 3 connection plate (59), a mounting shaft (512) is rotatably connected to the top of the No. 4 connection plate (511), the No. 1 loading wheel (515) and the No. 2 loading wheel (516) are respectively fixedly connected to two ends of the mounting shaft (512), a protrusion is provided on the surface of the No. 1 loading wheel (515), a No. 3 guide rail (513) is fixedly connected to the top of the No. 2 connection plate (55), a No. 3 guide block (514) is slidably connected inside the No. 3 guide rail (513), and the No. 3 guide block (514) is fixedly connected to the side of the No. 3 connection plate (59).

8. The agricultural machinery front axle assembly test bench according to claim 1, characterized in that: The transmission mechanism (6) comprises a No. 3 mounting frame (61), a connecting universal joint (64), a No. 2 fixing plate (65), a No. 1 fixing bolt (68) and a No. 2 fixing bolt (616); the No. 3 mounting frame (61) is fixedly connected to the side of the No. 2 mounting frame (41); a No. 2 X-axis moving assembly (62) is fixedly connected to the upper part of the No. 3 mounting frame (61); a moving end of the No. 2 X-axis moving assembly (62) is fixedly connected to a driving motor (63); one end of the connecting universal joint (64) is fixedly connected to the output end of the driving motor (63); the other end of the connecting universal joint (64) is fixedly connected to the No. 2 fixing plate (65); a No. 2 annular slide rail (66) is fixedly connected to the side of the No. 2 fixing plate (65); A second annular slider (67) is slidably connected inside the annular slide rail (66), a fourth guide rail (611) is fixedly connected to the side of the second annular slider (67), a fourth guide block (612) is slidably connected inside the fourth guide rail (611), a second fixing frame (614) is fixedly connected to the side of the fourth guide block (612), a fixed block (615) is inserted inside the second fixing frame (614), a mounting bolt (617) is fixedly connected to the side of the fixing block (615), the first fixing bolt (68) passes through the surface of the second annular slide rail (66) and is threadedly connected to the second annular slider (67), and the second fixing bolt (616) passes through the second fixing frame (614) and is threadedly connected to the fixing block (615).

9. The agricultural machinery front axle assembly test bench according to claim 8, characterized in that: The No. 4 guide block (612) is internally threadedly connected to a No. 2 adjusting screw rod (613), one end of which passes through the surface of the No. 4 guide rail (611), and the No. 2 adjusting screw rod (613) is rotatably connected to the No. 4 guide rail (611), the No. 2 fixing plate (65) is fixedly connected to a No. 3 annular slide rail (69) on the side, the No. 3 annular slide rail (69) is slidably connected to a No. 3 annular slider (610) on the inside, and the No. 3 annular slider (610) is fixedly connected to the No. 4 guide rail (611) on the side.

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