Combined automobile hub bearing muddy water test equipment

Abstract

The invention discloses a combined automobile hub bearing muddy water test device which comprises a test bench, a test box is arranged on the test bench, a spraying structure used for spraying muddy water to a to-be-tested hub bearing, a floating main shaft and a dismounting plate are arranged in the test box, and a dismounting hole is formed in the dismounting plate. The test bench is provided with a driving structure used for driving the floating main shaft to operate, and the bottom of the test box is provided with a loading structure used for applying an axial load or a radial load or an axial-radial combined load to the floating main shaft. The first adjusting structure is used for being in linkage fit with the loading structure to adjust the applying position and direction of the axial loading force, and the second adjusting structure is used for being in linkage fit with the first adjusting structure to limit the position of the floating main shaft. The problem that the reliability of test data is affected due to the fact that a traditional hub bearing testing machine is difficult to simulate the combined load working condition of an automobile hub bearing in actual operation and is difficult to adapt to the wheel track requirements of hub bearings of different specifications is solved.

Description

Technical Field

[0001] The invention relates to the technical field of bearing testing equipment, in particular to a combined automobile hub bearing muddy water testing equipment. Background Art

[0002] As a core component of the vehicle's driving system, the durability, sealing and load-bearing capacity of automobile wheel hub bearings directly determine driving safety and reliability. During actual operation, wheel hub bearings must simultaneously withstand radial loads from the vehicle's own weight, axial loads generated by acceleration / braking, and composite impact loads caused by complex road conditions. They are also exposed to harsh environments such as mud, water, and salt water for long periods of time, facing multiple challenges of wear, corrosion, and fatigue failure. Therefore, verifying the performance of wheel hub bearings by accurately simulating actual working conditions through test equipment has become a key link in ensuring product quality. However, existing wheel hub bearing test equipment has significant technical limitations in working condition simulation and universal adaptation, which are mainly reflected in the following aspects: First, the ability to simulate composite loads is insufficient: Traditional testing machines typically apply loads in a single direction, simulating only axial or radial stresses. They are unable to replicate the composite axial and radial loads generated by the axle weight and acceleration forces during vehicle operation. Similar to the phenomenon in which water-lubricated bearing testing equipment on ships distorts test data by ignoring propeller-induced shaft eccentricity, existing equipment fails to adequately simulate the complex stress scenarios of hub bearings under dynamic conditions such as steering and turbulence, resulting in substantial discrepancies between test loads and actual operating conditions.

[0003] Second, the wheelbase adjustment accuracy and ease of operation are low: The wheelbases of hub bearings vary significantly between different vehicle types (e.g., compact and mid-size cars), and the wheelbase adjustment mechanisms of existing equipment generally suffer from difficulties in debugging and insufficient positioning accuracy. Most equipment uses a mobile loading device to adjust parameters, but due to installation space limitations, the position deviation of the force loading point is difficult to control, and the adjustment process requires the collaboration of multiple people. This not only prolongs test preparation time, but also reduces the reliability of test data due to the offset of the loading position. Third, there are dual shortcomings in the authenticity of environmental simulation and the economy of equipment: on the one hand, existing muddy water and salt water environmental simulation systems generally have problems such as unstable injection flow and uneven coverage, making it difficult to accurately reproduce the actual erosion scenarios of vehicles wading through water and muddy roads; on the other hand, the structural design of traditional test benches is redundant, occupies a large site space, and is mostly customized for bearings of specific specifications, with extremely poor versatility. For example, the deep groove ball bearing testing machine has low space utilization due to its unreasonable layout, and the repeated construction of special test benches further increases equipment investment and site costs, restricting the improvement of test efficiency.

[0004] The above-mentioned defects make it difficult for existing equipment to form an integrated testing capability of "composite load + real environment + multi-specification adaptation". The test data deviates greatly from the actual working conditions, which not only affects the accuracy of product reliability assessment, but also extends the new product development cycle and increases R&D costs. Summary of the Invention

[0005] In view of the shortcomings of the existing technology, the present invention provides a combined automobile wheel hub bearing muddy water testing equipment to solve the problems in the existing technology.

[0006] To achieve the above-mentioned objectives, the present invention provides a combined automobile wheel hub bearing mud and water testing equipment, comprising a test bench, wherein the test bench is provided with a test box for accommodating an external wheel hub bearing to be tested, the test box is provided with a spraying structure for spraying mud and water onto the wheel hub bearing to be tested, a floating spindle and a disassembly plate for connecting to the shaft hole of the wheel hub bearing to be tested, the disassembly plate is provided with a disassembly hole for installing the external wheel hub bearing to be tested, the test bench is provided with a driving structure for driving the floating spindle to operate, the bottom of the test box is provided with a loading structure for applying an axial load or a radial load or an axial-radial combined load to the floating spindle, the test bench is provided with a first adjusting structure for cooperating with the loading structure to adjust the position and direction of the axial loading force application, and a second adjusting structure for cooperating with the first adjusting structure to limit the position of the floating spindle.

[0007] The advantages of adopting the above technical solution are as follows: the test bench provides stable support for the entire equipment, the test chamber provides an enclosed storage space for the wheel hub bearing to be tested, preventing the test medium from overflowing, and the spraying structure can spray muddy water or salt water onto the bearing, accurately simulating the harsh environmental conditions encountered during actual operation. The floating main shaft facilitates connection with the bearing shaft hole to achieve power transmission, allowing the drive structure to drive the floating main shaft to operate, driving the bearing to operate synchronously to simulate actual operating conditions. The disassembly plate and its disassembly holes facilitate the rapid installation and removal of the bearing to be tested, improving test preparation efficiency. The above loading structure can apply axial, radial, or axial-radial combined loads to the floating main shaft, recreating the combined forces experienced by the bearing during actual vehicle operation. The first adjustment structure can be adjusted by raising and lowering to adapt to the wheelbase requirements of bearings of different specifications, ensuring the accurate position and direction of the axial load application. The second adjustment structure can then limit the floating main shaft after the first adjustment structure is debugged to prevent wheelbase deviation during testing. The above technology improves the authenticity of test condition simulation and data reliability, enhances the adaptability of the equipment to bearings of different specifications, and solves the problems of poor versatility and insufficient test accuracy of traditional equipment.

[0008] The present invention is further provided with: a tooling sleeve for the floating spindle to pass through is provided on the test bench, a test bearing is connected between the inner peripheral wall of the shaft hole of the tooling sleeve and the outer peripheral wall of the floating spindle, the loading structure includes a composite loading plate, an axial loading cylinder and a radial loading cylinder, a connecting plate is provided on the outer peripheral wall of the tooling sleeve, the composite loading plate is connected to the connecting plate, the output end of the axial loading cylinder is linked with the composite loading plate and the direction in which the axial loading cylinder applies the load is arranged in the same direction as the axis direction of the floating spindle, the radial loading cylinder is linked with the composite loading plate and the direction in which the radial loading cylinder applies the load is arranged relatively perpendicular to the axis direction of the floating spindle.

[0009] The benefits of adopting the above technical solution are: the tooling sleeve on the test bench in the above technology provides penetration support for the floating spindle, ensuring the stable operation of the floating spindle, and the test bearing between the tooling sleeve and the floating spindle can reduce the direct friction between the two, reduce wear, and extend the service life of the floating spindle; the composite loading plate in the above loading structure serves as a load transfer carrier, which facilitates the force transmission of the axial and radial loading cylinders, and the connecting plate realizes a stable connection between the composite loading plate and the tooling sleeve, ensuring that the load is effectively transmitted to the tooling sleeve and the floating spindle, wherein the load direction applied by the axial loading cylinder is in the same direction as the axis of the floating spindle, ensuring accurate application of the axial load, and the load direction applied by the radial loading cylinder is perpendicular to the axis of the floating spindle, ensuring accurate application of the radial load, and through the cooperation of the two, the equipment can apply axial and radial loads separately or simultaneously, thereby meeting the requirements of the composite load test and improving the loading stability and accuracy.

[0010] The present invention is further provided with: the composite loading plate is composed of a vertical plate and a horizontal plate connected to each other, and the radial cross-section of the composite loading plate is set in an "L" shape; the output end of the axial loading cylinder is connected to an axial loading block; a slot for inserting the end of the horizontal plate is provided on the axial loading block; a resultant shaft is rotatably connected between the end of the horizontal plate and the slot; and a joint bearing is connected between the resultant shaft and the axial loading block; a swing groove is provided at the end of the horizontal plate along its height direction; a swing head is movably provided in the swing groove; the swing head is passed through the resultant shaft; the loading structure also includes a lever arm; the end of the lever arm is rotatably connected to the swing head and is connected to a rotating pin; the output end of the radial loading cylinder is rotatably connected to the starting end of the lever arm and is connected to a connecting pin; a support pin is rotatably connected between the center of the lever arm and the test bench.

[0011] The benefits of adopting the above technical solution are: the composite loading plate in the above technology is arranged in an "L" shape, and its optimized structural layout is adapted to the transmission requirements of axial and radial loads, thereby improving the force transmission efficiency; the axial loading block and the slot thereon are convenient for cooperation with the end of the cross plate of the composite loading plate, and the setting of the resultant shaft and the joint bearing can reduce the lateral force during axial loading, avoid damage to the loading cylinder core shaft, and ensure smooth axial load transmission. At the same time, the swing groove at the end of the cross plate cooperates with the swing head to adapt to slight directional changes during load transmission, thereby improving structural flexibility; the above-mentioned lever arm is supported by the supporting pin, and the combination of the connecting pin and the rotating pin can realize one-to-one precise transmission of radial force, thereby ensuring the accuracy of radial load application. When the axial and radial loads are loaded simultaneously, the swing head and the resultant shaft can combine the two into a resultant force and transmit it to the composite loading plate, accurately simulating the composite force in the actual operation of the vehicle, avoiding overload beyond the range caused by accidental impact during the test, and improving test safety and data accuracy.

[0012] The present invention is further provided with: a plurality of connecting holes are evenly distributed on the composite loading plate along its width direction; a mounting pin is connected to the corresponding position of any connecting hole on the connecting plate; a fixing plate is provided on the bottom wall of the connecting plate; a mounting shaft is rotatably connected to the fixing plate; a mounting hole is passed through the composite loading plate along its height direction; the mounting shaft is threadedly connected to the mounting hole.

[0013] The benefits of adopting the above technical solution are: the connection holes uniformly distributed along the width direction on the composite loading plate in the above technology cooperate with the mounting pins on the connecting plate, which facilitates the adjustment of the connection position between the composite loading plate and the connecting plate, adapts to the installation requirements of tooling sleeves of different specifications, and improves the adaptability of the equipment; and the fixing plate on the bottom wall of the connecting plate provides stable support for the installation shaft, and the threaded connection between the installation shaft and the mounting hole on the composite loading plate can achieve a firm fixation of the composite loading plate and the connecting plate, preventing the two from loosening relative to each other during the test loading process, ensuring stable and reliable load transmission, avoiding loading deviations caused by loose connections, and improving the accuracy of test data. At the same time, the threaded connection structure facilitates later maintenance and disassembly, reduces equipment maintenance costs, and optimizes structural practicality.

[0014] The present invention further provides that: the driving structure includes a driving motor arranged on the test bench, the floating main shaft is coaxially connected to a transmission shaft, a pulley is provided on the transmission shaft, and the driving motor and the pulley are connected to a transmission belt.

[0015] The benefits of adopting the above technical solution are: in the above technology, the drive motor provides a stable power source for the equipment, ensuring continuous and reliable power output, and the pulley on the drive shaft is connected to the drive motor through a transmission belt to achieve efficient power transmission, driving the floating main shaft and the bearing to be tested to operate synchronously, accurately simulating the speed conditions of the bearing during actual operation, and the belt drive structure has buffering and vibration reduction characteristics, which can reduce the vibration of the drive motor during operation and transmit it to the floating main shaft, avoiding the impact of vibration on test accuracy, and the belt drive structure is simple, low-cost, and easy to maintain, reducing the occurrence rate of equipment failures, ensuring the continuity and stability of the test process, and improving the reliability of equipment operation.

[0016] The present invention is further provided with: a transmission sleeve is provided on the test bench, the transmission shaft is rotatably connected in the transmission sleeve, a matching plate is provided at the bottom of the transmission sleeve, a plurality of first matching holes are opened on the matching plate along its height direction, the first adjustment structure includes a main wheelbase adjustment plate, the main wheelbase adjustment plate is provided with a plurality of first adjustment holes along its height direction, and some of the first adjustment holes are detachably connected with first adjustment pins for connecting with adjacent first matching holes.

[0017] The advantages of adopting the above technical solution are as follows: the transmission sleeve on the test bench provides stable rotational support for the drive shaft, preventing the drive shaft from shaking during operation and ensuring smooth power transmission. The drive shaft is rotatably connected to the transmission sleeve, which can reduce direct friction between the two, reduce component wear, and extend the service life of the drive shaft and the transmission sleeve. The mating plate at the bottom of the transmission sleeve can provide an installation base for the connection between the transmission sleeve and other structures, facilitating the precise mating of the transmission sleeve and the main track adjustment plate, and improving the convenience of structural assembly. In the first adjustment structure, the main track adjustment plate serves as the basic carrier for the adjustment operation. The multiple first adjustment holes opened in the height direction can provide multiple adjustment positions to adapt to the track requirements of hub bearings of different specifications to be tested, thereby expanding the applicability of the equipment. The first adjustment pins that can be detachably connected in some of the first adjustment holes can quickly fix the position of the main track adjustment plate by connecting with adjacent first mating holes. The disassembly and assembly process does not require complex tools, thereby improving the efficiency of track adjustment. At the same time, it can ensure that the position of the main track adjustment plate is stable after adjustment, prevent position deviation due to load during the test, ensure the accuracy of the position where the axial load force is applied, and thus improve the reliability of the test data.

[0018] The present invention is further provided with: the second adjustment structure includes two auxiliary wheelbase adjustment plates arranged relatively in the test box, the disassembly plate is located between the two auxiliary wheelbase adjustment plates and a plurality of second adjustment holes are opened on both side walls of the disassembly plate along the height direction of the disassembly plate, a plurality of second matching holes are opened on the side walls of the two auxiliary wheelbase adjustment plates along their height direction, and some of the second adjustment holes are detachably connected to second adjustment pins for connecting with adjacent second matching holes.

[0019] The advantages of adopting the above technical solution are as follows: the two oppositely arranged secondary wheelbase adjustment plates can form symmetrical support for the disassembly plate located therebetween, ensuring balanced force on the disassembly plate, preventing the disassembly plate from tilting due to load during testing, and providing a structural foundation for the stable installation of the wheel hub bearing to be tested; the plurality of second adjustment holes provided along the height direction of the side walls of the disassembly plate and the plurality of second matching holes provided along the height direction of the side walls of the secondary wheelbase adjustment plate form a multi-level adjustment adaptation structure. By selecting the second adjustment holes at different positions to align with the second matching holes, the height of the disassembly plate can be flexibly adjusted, thereby adapting to the wheelbase requirements of wheel hub bearings of different specifications and improving the versatility of the equipment for test samples of multiple specifications; the detachable second adjustment pins in some of the second adjustment holes can quickly achieve a fixed connection between the second adjustment holes and the adjacent second matching holes, allowing the disassembly and assembly operations to be completed without complex tools, shortening test preparation time. At the same time, when the adjustment pins are locked, the relative displacement of the disassembly plate and the secondary wheelbase adjustment plate can be effectively limited, preventing wheelbase deviation during testing, ensuring the accuracy of the position where the axial load is applied, and providing guarantees for the reliability of the test data.

[0020] The present invention further provides that: the spraying structure includes a driving pump for outputting muddy water or salt water and a nozzle for cooperating with the driving pump to spray the muddy water or salt water onto the wheel hub bearing to be tested, and the nozzle is made of a stainless steel bamboo tube.

[0021] The benefits of adopting the above technical solution are: the driving pump in the spraying structure in the above technology can stably output muddy water or salt water, providing a continuous test medium for environmental simulation, ensuring the continuity of environmental simulation, and the nozzle is used to accurately spray muddy water or salt water onto the wheel hub bearing to be tested, meeting the spraying requirements of different test parts. At the same time, the nozzle is made of stainless steel bamboo tube, which has good corrosion resistance and can adapt to the corrosive environment of muddy water and salt water, extending the service life of the nozzle, and the stainless steel bamboo tube can be bent and adjusted at any angle, which is convenient for the operator to point the nozzle to the specified position of the bearing according to the test requirements, improve the spraying accuracy, ensure the authenticity of the environmental simulation, adapt to the spraying requirements of bearings of different specifications, and enhance the practicality of the equipment.

[0022] The present invention is further provided that: the driving pump includes a stepper motor and a double-head peristaltic pump, the stepper motor and the double-head peristaltic pump are located below the test bench and the stepper motor and the double-head peristaltic pump are arranged in linkage with each other, and the output end of the double-head peristaltic pump is connected to the nozzle.

[0023] The benefits of adopting the above technical solution are: the above technology uses a stepper motor to drive the double-head peristaltic pump, wherein the stepper motor has high control accuracy, can flexibly realize the start and stop of the double-head peristaltic pump, accurately control the output flow of muddy water or brine, improve the accuracy of environmental simulation, and meet the requirements of different tests for medium flow, and the double-head peristaltic pump can provide dual-channel medium output, adapt to the needs of different spraying structures on the equipment, enhance spraying flexibility, and the stepper motor and the double-head peristaltic pump are located under the test bench, without occupying the surface space of the test bench, optimizing the overall layout of the equipment, making the surface structure of the test bench more compact, and improving space utilization. At the same time, the installation below facilitates the later maintenance and inspection of the pump, reduces the difficulty of maintenance operations, and ensures long-term stable operation of the equipment.

[0024] The present invention is further provided with: a return water tank is provided at the bottom of the test box, a filter tank connected to the return water tank is opened on the bottom wall of the inner cavity of the test box, a water storage tank connected to the double-head peristaltic pump is provided at the bottom of the test bench, and a fine return water filter is provided between the bottom of the return water tank and the water storage tank.

[0025] The benefits of adopting the above technical solution are: the return water tank at the bottom of the test box in the above technology can collect muddy water or salt water flowing out after the test, avoiding pollution and waste caused by arbitrary discharge of the medium; the filter tank on the bottom wall of the inner cavity of the test box can perform preliminary filtration on the return medium, intercept large particles of impurities, prevent them from entering the subsequent pipeline and causing blockage, and ensure the smooth flow of the pipeline; the water storage tank at the bottom of the test bench is used to store the filtered medium, providing a circulating medium source for the double-head peristaltic pump, realizing the recycling of the test medium, reducing resource consumption, and reducing test costs; and the fine return water filter between the return water tank and the water storage tank can further filter the medium to ensure the cleanliness of the circulating medium, avoid impurities affecting the spraying effect and the bearing test status, ensure the consistency of the environmental simulation, and improve the reliability of the test data. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A three-dimensional view of the present invention; Figure 2 A front three-dimensional view of the test bench and its linkage components in the present invention; Figure 3 for Figure 2 A partial side sectional view of Figure 4 A three-dimensional view of the cooperation state of the floating main shaft, the loading structure and the spraying structure in the present invention; Figure 5 It is a side sectional view of the floating main shaft and the loading structure in the present invention; Figure 6 It is a front cross-sectional view of the cooperation state of the floating main shaft and the loading structure in the present invention. DETAILED DESCRIPTION

[0027] The present invention provides a combined automobile wheel hub bearing mud and water testing equipment, comprising a test bench 1, the test bench 1 being provided with a test box 11 for accommodating an external wheel hub bearing 12 to be tested, the test box 11 being provided with a spraying structure for spraying mud and water onto the wheel hub bearing 12 to be tested, a floating main shaft 13 for connecting to the axial hole of the wheel hub bearing 12 to be tested, and a disassembly plate 14, the disassembly plate 14 being provided with a disassembly hole 141 for installing the external wheel hub bearing 12 to be tested, the test bench 1 being provided with a driving structure for driving the floating main shaft 13 to operate, the bottom of the test box 11 being provided with a loading structure for applying an axial load or a radial load or an axial-radial combined load to the floating main shaft 13, the test bench 1 being provided with a A first adjustment structure for adjusting the position and direction of axial loading force application is linked to cooperate with the first adjustment structure to limit the position of the floating spindle 13. The test bench 1 is provided with a tooling sleeve 2 for the floating spindle 13 to pass through. A test bearing 21 is connected between the inner peripheral wall of the axial hole of the tooling sleeve 2 and the outer peripheral wall of the floating spindle 13. The loading structure includes a composite loading plate 3, an axial loading cylinder 33 and a radial loading cylinder 35. A connecting plate 22 is provided on the outer peripheral wall of the tooling sleeve 2. The composite loading plate 3 is connected to the connecting plate 22. The output end of the axial loading cylinder 33 is linked to the composite loading plate 3 and the load direction of the axial loading cylinder 33 is set in the same direction as the axial direction of the floating spindle 13. The radial loading The load cylinder 35 is coordinated with the composite loading plate 3 and the load application direction of the radial loading cylinder 35 is relatively perpendicular to the axis direction of the floating main shaft 13. The composite loading plate 3 is composed of a vertical plate 31 and a horizontal plate 32 connected to each other, and the radial cross-section of the composite loading plate 3 is "L"-shaped. The output end of the axial loading cylinder 33 is connected to an axial loading block 331, and a slot 332 is provided on the axial loading block 331 for the end of the horizontal plate 32 to be inserted. A resultant shaft 321 is rotatably connected between the end of the horizontal plate 32 and the slot 332, and a joint bearing 322 is connected between the resultant shaft 321 and the axial loading block 331. A swing groove 323 is provided at the end of the horizontal plate 32 along its height direction, and a swing head 324 is movably provided in the swing groove 323. The resultant force shaft 321 is provided with a swing head 324, and the loading structure further includes a lever arm 34, the end of the lever arm 34 is rotatably connected to the swing head 324 and is connected to a rotating pin 341, the output end of the radial loading cylinder 35 is rotatably connected to the starting end of the lever arm 34 and is connected to a connecting pin 342, a support pin 343 is rotatably connected between the center of the lever arm 34 and the test bench 1, a plurality of connecting holes 36 are evenly distributed on the composite loading plate 3 along its width direction, a mounting pin 221 is connected to a position corresponding to any connecting hole 36 on the connecting plate 22, a fixing plate 222 is provided on the bottom wall of the connecting plate 22, a mounting shaft 223 is rotatably connected to the fixing plate 222, and a mounting hole 37 is passed through the composite loading plate 3 along its height direction.The mounting shaft 223 is threadedly connected to the mounting hole 37. The driving structure includes a driving motor 4 arranged on the test bench. The floating main shaft 13 is coaxially connected to the transmission shaft 132. The transmission shaft 132 is provided with a pulley 131. The driving motor 4 and the pulley 131 are connected with a transmission belt 41. The test bench 1 is provided with a transmission sleeve 15. The transmission shaft 132 is rotatably connected to the transmission sleeve 15. The bottom of the transmission sleeve 15 is provided with a matching plate 151. The matching plate 151 is provided along its height direction. A plurality of first matching holes 152 are opened, the first adjustment structure includes a main wheelbase adjustment plate 5, the main wheelbase adjustment plate 5 is provided with a plurality of first adjustment holes 51 along its height direction, some of the first adjustment holes 51 are detachably connected with first adjustment pins 52 for connecting with adjacent first matching holes 152, the second adjustment structure includes two auxiliary wheelbase adjustment plates 53 arranged oppositely in the test box 11, the disassembly plate 14 is located between the two auxiliary wheelbase adjustment plates 53 and both side walls of the disassembly plate 14 are opened along the height direction of the disassembly plate There are a number of second adjustment holes 142, and a number of second matching holes 531 are opened on the side walls of the two auxiliary wheelbase adjustment plates 53 along their height direction. Some of the second adjustment holes 531 are detachably connected to second adjustment pins for connecting to adjacent second matching holes. The spraying structure includes a driving pump for outputting muddy water or salt water and a nozzle 63 for cooperating with the driving pump to spray muddy water or salt water onto the wheel hub bearing 12 to be tested. The nozzle 63 is made of a stainless steel bamboo tube. The driving pump includes a stepping motor 6 and A double-headed peristaltic pump 61 is located below the test bench 1. The stepper motor 6 and the double-headed peristaltic pump 61 are arranged in a coordinated manner. The output end of the double-headed peristaltic pump 61 is connected to a nozzle 63. A return water tank 7 is provided at the bottom of the test chamber 11. A filter tank 111 is provided on the bottom wall of the inner cavity of the test chamber 11 and is connected to the return water tank 7. A water storage tank 71 is provided at the bottom of the test bench 1 and is connected to the double-headed peristaltic pump 61. A fine return water filter 72 is provided between the bottom of the return water tank 7 and the water storage tank 71.

[0028] The overall operation process of this equipment: 1. Test preparation stage: First, install and fix the wheel hub bearing to be tested through the disassembly and assembly holes on the disassembly and assembly plate, and then connect the bearing shaft hole to the floating main shaft in the test chamber to ensure a firm connection; at the same time, check the storage capacity of muddy water or salt water in the water storage tank, confirm that the fine return water filter between the return water tank and the water storage tank and the filter tank on the bottom wall of the test chamber are in normal condition, and ensure that the medium circulation channel is unobstructed. In addition, check the installation status of the accompanying test bearing between the tooling sleeve and the floating main shaft to avoid operation jams.

[0029] 2. Wheelbase adjustment and limiting stage: Operate the first adjustment structure to change the relative position of the drive motor and the main wheelbase adjustment plate by adjusting the first adjustment pin in the first adjustment hole on the main wheelbase adjustment plate, so as to adjust the position and direction of the axial load force to adapt to the wheelbase requirements of the bearing to be tested; after the wheelbase is adjusted to the right position, operate the second adjustment structure to fix the position of the disassembly plate by adjusting the second adjustment pin in the second adjustment hole between the secondary wheelbase adjustment plate and the disassembly plate, thereby limiting the floating spindle to prevent wheelbase deviation during the test.

[0030] 3. Working condition simulation startup phase: Start the drive structure, and the drive motor drives the pulley on the floating main shaft through the transmission belt, so that the floating main shaft rotates synchronously, and then drives the tested wheel hub bearing to rotate, simulating the rotation condition of the bearing during actual operation; then start the spraying structure, and the stepper motor drives the double-head peristaltic pump to operate, transporting the muddy water or salt water in the water tank to the nozzle made of stainless steel bamboo tube. The nozzle is bent and adjusted in angle according to the test requirements, so that the medium is accurately sprayed onto the surface of the bearing to be tested, simulating the actual muddy water or salt water environment.

[0031] 4. Load application stage: Start the loading structure. If axial load needs to be applied, the axial loading cylinder transmits the force to the "L"-shaped composite loading plate through the axial loading block and the resultant shaft, and then transmits it to the tooling sleeve and the floating main shaft through the connecting plate, and finally acts on the bearing; if radial load needs to be applied, the radial loading cylinder drives the lever arm to rotate around the support pin through the connecting pin, and the end of the lever arm transmits radial force to the swing head through the rotating pin, and then transmits it to the floating main shaft and bearing through the composite loading plate; if composite load needs to be applied, the axial and radial loading cylinders work synchronously, and the load is combined into a composite force through the swing head and the resultant shaft and then transmitted, simulating the axial radial composite force in actual vehicle operation.

[0032] 5. Medium circulation and test monitoring stage: After the test, the muddy water or salt water enters the return water tank through the filter groove on the bottom wall of the test chamber, is initially filtered and then filtered through the fine return water filter, and finally returns to the water storage tank for recycling; during the test, the bearing operation status, load application stability and medium circulation are monitored in real time to ensure that the test parameters meet the set requirements.

[0033] 6. End of the test: first stop the loading structure, spraying structure and driving structure in sequence. After the equipment is completely stopped, loosen the second adjusting pin and the first adjusting pin, remove the wheel hub bearing to be tested, and finally clean the residual medium in the test box, check the status of each component of the equipment, and prepare for the next test.

[0034] In order to improve the portability and accuracy of the test in the above technology, load sensors can be set at the output ends of the axial loading cylinder and the radial loading cylinder to improve the detection efficiency and accuracy. The axial loading cylinder and the radial loading cylinder in the above technology are both existing technologies and can be replaced by hydraulic output devices such as cylinders according to actual needs.

[0035] In order to improve the ease of test operation in the above technology, the loading structure, the driving structure and the spraying structure can be opened and closed by an external industrial control computer or an electric control box and other intelligent industrial control equipment, thereby improving the ease of operation. At the same time, the intelligent industrial control equipment is an existing technology, so its structure and function will not be described in detail.

[0036] In order to improve the test efficiency and accuracy in the above technology, at least two groups of relative test units can be set on the test bench, that is, two groups of test boxes and corresponding linkage structures are set, and then large-scale tests can be achieved through multiple groups of test units, thereby improving the test efficiency and test accuracy.

[0037] In order to improve the neatness of the drawings in the above description, the connecting pipes between the nozzle and the double-head peristaltic pump are not drawn to facilitate understanding. In actual production and use, there are connecting pipes between the nozzle and the double-head peristaltic pump to facilitate the transmission and injection of liquid substances such as muddy water or brine.

[0038] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which shall fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A combined automobile wheel hub bearing muddy water testing equipment, characterized by: The invention comprises a test bench, wherein the test bench is provided with a test box for accommodating a wheel hub bearing to be tested from the outside, the test box is provided with a spraying structure for spraying muddy water onto the wheel hub bearing to be tested, a floating main shaft and a disassembly plate for connecting with the shaft hole of the wheel hub bearing to be tested, the disassembly plate is provided with a disassembly hole for installing the wheel hub bearing to be tested from the outside, the test bench is provided with a driving structure for driving the floating main shaft to operate, the bottom of the test box is provided with a loading structure for applying an axial load or a radial load or an axial-radial combined load to the floating main shaft, the test bench is provided with a first adjusting structure for cooperating with the loading structure to adjust the position and direction of application of the axial loading force, and a second adjusting structure for cooperating with the first adjusting structure to limit the position of the floating main shaft.

2. The combined automobile wheel hub bearing muddy water testing equipment according to claim 1, characterized in that: The test bench is provided with a tooling sleeve for the floating spindle to pass through, and a test bearing is connected between the inner peripheral wall of the shaft hole of the tooling sleeve and the outer peripheral wall of the floating spindle. The loading structure includes a composite loading plate, an axial loading cylinder and a radial loading cylinder. A connecting plate is provided on the outer peripheral wall of the tooling sleeve, and the composite loading plate is connected to the connecting plate. The output end of the axial loading cylinder is linked with the composite loading plate, and the direction in which the axial loading cylinder applies the load is arranged in the same direction as the axis direction of the floating spindle. The radial loading cylinder is linked with the composite loading plate, and the direction in which the radial loading cylinder applies the load is arranged relatively perpendicular to the axis direction of the floating spindle.

3. The combined automobile wheel hub bearing muddy water testing equipment according to claim 2, characterized in that: The composite loading plate is composed of a vertical plate and a horizontal plate connected to each other, and the radial cross-section of the composite loading plate is set in an "L" shape. The output end of the axial loading cylinder is connected to an axial loading block, and a slot is provided on the axial loading block for inserting the end of the horizontal plate. A resultant shaft is rotatably connected between the end of the horizontal plate and the slot, and a joint bearing is connected between the resultant shaft and the axial loading block. A swing groove is provided at the end of the horizontal plate along its height direction, and a swing head is movably provided in the swing groove. The swing head is provided through the resultant shaft. The loading structure also includes a lever arm, and the end of the lever arm is rotatably connected to the swing head and is connected to a rotating pin. The output end of the radial loading cylinder is rotatably connected to the starting end of the lever arm and is connected to a connecting pin. The center of the lever arm is rotatably connected to a supporting pin.

4. The combined automobile wheel hub bearing muddy water testing equipment according to claim 3, characterized in that: The composite loading plate is provided with a plurality of connection holes evenly distributed along its width direction, and a mounting pin is connected to a corresponding position of any connection hole on the connection plate. A fixing plate is provided on the bottom wall of the connection plate, and a mounting shaft is rotatably connected to the fixing plate. The composite loading plate is provided with a mounting hole along its height direction, and the mounting shaft is threadedly connected to the mounting hole.

5. The combined automobile wheel hub bearing muddy water testing equipment according to claim 1, characterized in that: The driving structure includes a driving motor arranged on the test bench, the floating main shaft is coaxially connected to a transmission shaft, a pulley is arranged on the transmission shaft, and the driving motor and the pulley are connected to a transmission belt.

6. The combined automobile wheel hub bearing muddy water testing equipment according to claim 5, characterized in that: The test bench is provided with a transmission sleeve, the transmission shaft is rotatably connected in the transmission sleeve, a matching plate is provided at the bottom of the transmission sleeve, a plurality of first matching holes are opened on the matching plate along its height direction, the first adjustment structure includes a main wheelbase adjustment plate, the main wheelbase adjustment plate is provided with a plurality of first adjustment holes along its height direction, and some of the first adjustment holes are detachably connected with first adjustment pins for connecting with adjacent first matching holes.

7. The combined automobile wheel hub bearing muddy water testing equipment according to claim 6, characterized in that: The second adjustment structure includes two secondary wheelbase adjustment plates arranged opposite to each other in the test box, the disassembly plate is located between the two secondary wheelbase adjustment plates, and a plurality of second adjustment holes are opened on both side walls of the disassembly plate along the height direction of the disassembly plate, and a plurality of second matching holes are opened on the side walls of the two secondary wheelbase adjustment plates along the height direction thereof, and some of the second adjustment holes are detachably connected to second adjustment pins for connecting with adjacent second matching holes.

8. The combined automobile wheel hub bearing muddy water testing equipment according to claim 1, characterized in that: The spraying structure includes a driving pump for outputting muddy water or salt water and a nozzle for cooperating with the driving pump to spray the muddy water or salt water onto the wheel hub bearing to be tested. The nozzle is made of a stainless steel bamboo tube.

9. The combined automobile wheel hub bearing muddy water testing equipment according to claim 8, characterized in that: The driving pump includes a stepper motor and a double-head peristaltic pump. The stepper motor and the double-head peristaltic pump are located below the test bench and the stepper motor and the double-head peristaltic pump are arranged in a linkage manner. The output end of the double-head peristaltic pump is connected to the nozzle.

10. The combined automobile wheel hub bearing muddy water testing equipment according to claim 9, characterized in that: A return water tank is provided at the bottom of the test box, a filter tank connected to the return water tank is opened on the bottom wall of the test box inner cavity, a water storage tank connected to the double-head peristaltic pump is provided at the bottom of the test bench, and a fine return water filter is provided between the bottom of the return water tank and the water storage tank.

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