Combined automobile wheel hub bearing water test equipment

Abstract

The application discloses a combined automobile wheel hub bearing mud water test equipment, which comprises a test table, a test box arranged on the test table, a spraying structure for spraying mud water to a wheel hub bearing to be tested, a floating main shaft and a dismounting plate arranged in the test box, a dismounting hole arranged on the dismounting plate, a driving structure arranged on the test table and used for driving the floating main shaft to rotate, a loading structure arranged at the bottom of the test box and used for applying an axial load, a radial load or an axial and radial combined load to the floating main shaft, a first adjusting structure arranged on the test table and used for cooperating with the loading structure to adjust the position and direction of the axial load, and a second adjusting structure arranged on the test table and used for cooperating with the first adjusting structure to limit the position of the floating main shaft. The application solves the problems that the traditional wheel hub bearing test machine is difficult to simulate the combined load condition of the automobile wheel hub bearing in actual operation and is difficult to adapt to the wheel distance requirement of different specifications of wheel hub bearings, thereby affecting the reliability of test data.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of bearing test equipment, in particular to a combined automobile wheel hub bearing mud water test equipment. BACKGROUND

[0002] As the core component of the vehicle running system, the durability, sealing performance and load resistance of the automobile wheel hub bearing directly determine the safety and reliability of driving. In actual operation, the wheel hub bearing needs to bear the radial load from the vehicle weight, the axial load generated by acceleration / braking and the complex impact load caused by complex road conditions, and is exposed to mud, salt water and other harsh environments for a long time, facing multiple challenges of wear, corrosion and fatigue failure. Therefore, accurately simulating the actual working conditions through test equipment to verify the performance of the wheel hub bearing is a key link to ensure product quality. However, the existing wheel hub bearing test equipment has significant technical limitations in working condition simulation and general adaptability, mainly in the following aspects:

[0003] Firstly, the complex load simulation capability is insufficient: traditional test machines mostly use single direction load application method, which can only simulate axial or radial stress state separately, and cannot reproduce the axial and radial combined load system formed by the weight of the vehicle and the acceleration force in vehicle driving. Similar to the test device for water-lubricated bearings of ships, the test data is distorted due to the neglect of the shaft system eccentricity caused by the propeller. The existing equipment is insufficient in simulating the complex stress field of the wheel hub bearing under dynamic conditions such as turning and bumping, resulting in essential differences between the test load and the actual working conditions.

[0004] Secondly, the wheel distance adjustment precision and operation convenience are low: the wheel distance of wheel hub bearings of different vehicle models (such as compact cars and medium-sized cars) varies significantly, and the wheel distance adjustment structure of the existing equipment generally has problems such as difficult debugging and insufficient positioning accuracy. Most of the equipment adjusts parameters by moving the loading device, but due to the limitation of installation space, the position deviation of the force loading point is difficult to control, and the adjustment process needs to be completed by multiple people, which not only prolongs the test preparation time, but also reduces the reliability of the test data due to the deviation of the loading position.

[0005] Thirdly, there are double shortcomings in environmental simulation authenticity and equipment economy: on the one hand, the existing mud and salt water environment simulation system generally has problems such as unstable spraying flow and uneven coverage, making it difficult to accurately reproduce the actual erosion scene of the vehicle in water and muddy road; on the other hand, the traditional test bench structure design is redundant, occupying a large space, and most of them are customized for specific specifications of bearings, with poor universality. For example, the deep groove ball bearing test machine has low space utilization due to unreasonable layout, and the repeated construction of special test benches further increases the cost of equipment investment and site, which restricts the improvement of test efficiency.

[0006] The defects cause that the existing device is difficult to form the integrated test capability of "compound load + real environment + multi-specification adaptation", the test data deviates greatly from the actual working condition, which not only affects the accuracy of product reliability evaluation, but also prolongs the new product development cycle and increases the research and development cost. SUMMARY

[0007] In view of the defects of the prior art, the application provides a combined automobile wheel hub bearing mud water test device to solve the problems in the prior art.

[0008] To achieve the above purpose, the application provides a combined automobile wheel hub bearing mud water test device, which comprises a test table, a test box for accommodating the external wheel hub bearing to be tested is arranged on the test table, a spraying structure for spraying mud water to the wheel hub bearing to be tested, a floating main shaft for connecting with the shaft hole of the wheel hub bearing to be tested and a dismounting plate are arranged in the test box, a dismounting hole for mounting the external wheel hub bearing to be tested is formed in the dismounting plate, a driving structure for driving the floating main shaft to rotate is arranged on the test table, a loading structure for applying axial load or radial load or axial and radial compound load to the floating main shaft is arranged at the bottom of the test box, a first adjusting structure for linkage cooperation with the loading structure to adjust the position and direction of the axial load and a second adjusting structure for linkage cooperation with the first adjusting structure to limit the position of the floating main shaft are arranged on the test table.

[0009] The above technical solution has the advantages that the test table provides stable support for the whole device, the test box provides a closed accommodation space for the wheel hub bearing to be tested to avoid overflow of the test medium, the spraying structure can spray mud water or salt water to the bearing to accurately simulate the harsh environmental conditions in actual operation, the floating main shaft is connected with the bearing shaft hole to realize power transmission, the driving structure can drive the floating main shaft to rotate to drive the bearing to rotate synchronously to simulate the actual operation condition, the dismounting plate and the dismounting hole thereon facilitate quick mounting and dismounting of the bearing to be tested, improving the test preparation efficiency, the loading structure can apply axial, radial or axial and radial compound load to the floating main shaft to restore the compound force borne by the bearing in actual vehicle operation, the first adjusting structure can adjust the track pitch requirement of bearings of different specifications through lifting adjustment to ensure the accurate position and direction of the axial load, and the second adjusting structure can limit the floating main shaft after adjustment of the first adjusting structure to prevent track pitch deviation during the test.

[0010] The application further provides that: the test bench is provided with a tool sleeve for the floating main shaft to pass through, a test bearing is connected between the inner wall of the shaft hole of the tool sleeve and the outer wall of the floating main shaft, the loading structure comprises a composite loading plate, an axial loading cylinder and a radial loading cylinder, a connecting plate is arranged on the outer wall of the tool sleeve, the composite loading plate is arranged in connection with the connecting plate, the output end of the axial loading cylinder is connected in linkage with the composite loading plate, and the loading direction of the axial loading cylinder is arranged in the same direction as the axial direction of the floating main shaft; the radial loading cylinder is connected in linkage with the composite loading plate, and the loading direction of the radial loading cylinder is arranged in a direction perpendicular to the axial direction of the floating main shaft.

[0011] The above technical solution has the advantages that: the tool sleeve on the test bench provides support for the floating main shaft to pass through, ensuring stable operation of the floating main shaft, and the test bearing between the tool sleeve and the floating main shaft can reduce direct friction between the two and reduce wear and tear, prolonging the service life of the floating main shaft; the composite loading plate in the loading structure serves as a load transmission carrier, facilitating force transmission of the axial and radial loading cylinders, and the connecting plate realizes stable connection of the composite loading plate and the tool sleeve, ensuring effective load transmission to the tool sleeve and the floating main shaft, wherein the loading direction of the axial loading cylinder is in the same direction as the axial direction of the floating main shaft, ensuring accurate axial load application, and the loading direction of the radial loading cylinder is perpendicular to the axial direction of the floating main shaft, ensuring accurate radial load application, so that the equipment can apply axial and radial loads alone or simultaneously, thereby meeting the composite load test requirements and improving loading stability and precision.

[0012] The application further provides that: the composite loading plate is composed of a vertical plate and a horizontal plate connected with each other and has an "L" shape in the radial cross section; the output end of the axial loading cylinder is connected with an axial loading block, the axial loading block is provided with a slot for the end of the horizontal plate to insert, a resultant force shaft is rotatably connected between the end of the horizontal plate and the slot, and a joint bearing is connected between the resultant force shaft and the axial loading block; the end of the horizontal plate is provided with an oscillation groove in the height direction thereof, and an oscillation head is movably arranged in the oscillation groove; the resultant force shaft passes through the oscillation head; the loading structure further comprises a lever arm, the end of the lever arm is rotatably connected with the oscillation head and connected with a rotating pin shaft, the output end of the radial loading cylinder is rotatably connected with the beginning of the lever arm and connected with a connecting pin shaft, and a supporting pin shaft is rotatably connected between the center of the lever arm and the test bench.

[0013] The technical scheme has the beneficial effects that: in the above technology, the composite loading plate is arranged in an "L" shape, which optimizes the structure layout to adapt to the transmission requirements of axial and radial loads, and improves the force transmission efficiency; the axial loading block and the upper slot facilitate cooperation with the end of the cross plate of the composite loading plate, and the setting of the resultant axis and the joint bearing can reduce the lateral force during axial loading, avoid damage to the loading cylinder shaft, ensure smooth axial load transmission, and the swing groove at the end of the cross plate cooperates with the swing head to adapt to slight direction changes during load transmission, improving the structural flexibility; the lever arm is rotationally supported by the supporting pin shaft, and in combination with the connecting pin shaft and the rotating pin shaft, it can realize one-to-one accurate transmission of radial force, ensuring the accuracy of radial load application, and when the axial and radial loads are loaded synchronously, the swing head and the resultant axis can combine the two into a resultant force and transmit it to the composite loading plate, accurately simulating the combined force in the actual operation of the vehicle, avoiding overloading caused by accidental impact during the test, and improving the test safety and data accuracy.

[0014] The application further provides that: the composite loading plate is uniformly provided with a plurality of connecting holes along the width direction thereof, the connecting plate is connected with a mounting pin at any connecting hole position, the bottom wall of the connecting plate is provided with a fixing plate, the fixing plate is rotationally connected with a mounting shaft, the composite loading plate is penetrated by a mounting hole along the height direction thereof, and the mounting shaft is threadedly connected with the mounting hole.

[0015] The technical scheme has the beneficial effects that: in the above technology, the composite loading plate is uniformly provided with a plurality of connecting holes along the width direction thereof, the connecting plate is connected with a mounting pin at any connecting hole position, the bottom wall of the connecting plate is provided with a fixing plate, the fixing plate is rotationally connected with a mounting shaft, the composite loading plate is penetrated by a mounting hole along the height direction thereof, and the mounting shaft is threadedly connected with the mounting hole.

[0016] The application further provides that: the driving structure comprises a driving motor arranged on the test bench, the floating main shaft is coaxially connected with a transmission shaft, the transmission shaft is provided with a belt wheel, and the driving motor and the belt wheel are drivingly connected with a transmission belt.

[0017] The technical scheme has the beneficial effects that: the driving motor provides a stable power source for the equipment, ensuring continuous and reliable power output; the pulley on the transmission shaft is connected with the driving motor through a transmission belt, achieving efficient transmission of power, driving the floating main shaft and the bearing to be tested to rotate synchronously, accurately simulating the rotating speed condition of the bearing in actual operation, the belt transmission structure has a buffering and damping characteristic, reducing the vibration of the driving motor during operation and transmitting to the floating main shaft, avoiding the influence of vibration on the test accuracy, and the belt transmission structure is simple, low in cost and easy to maintain, reducing the equipment failure rate, ensuring the continuity and stability of the test process, and improving the operation reliability of the equipment.

[0018] The test bench is further provided with a transmission sleeve, the transmission shaft is rotatably connected in the transmission sleeve, the transmission sleeve is provided with a matching plate at the bottom, a plurality of first matching holes are formed in the height direction of the matching plate, the first adjusting structure comprises a main wheel track adjusting plate, a plurality of first adjusting holes are formed in the height direction of the main wheel track adjusting plate, and a first adjusting pin for connecting with adjacent first matching holes is detachably connected in part of the first adjusting holes.

[0019] The technical scheme has the beneficial effects that: the transmission sleeve on the test bench provides stable rotating support for the transmission shaft, avoiding shaking during operation of the transmission shaft, ensuring the stability of power transmission, the transmission shaft is rotatably connected in the transmission sleeve, reducing direct friction between the two, reducing part wear and tear, and prolonging the service life of the transmission shaft and the transmission sleeve; the matching plate at the bottom of the transmission sleeve provides a mounting base for the connection of the transmission sleeve and other structures, facilitating accurate matching of the transmission sleeve and the main wheel track adjusting plate, and improving the convenience of structure assembly; in the first adjusting structure, the main wheel track adjusting plate serves as a basic carrier for adjusting operation, a plurality of first adjusting holes formed in the height direction of the main wheel track adjusting plate can provide multiple gear adjusting positions, adapt to the wheel track requirements of bearings of different specifications to be tested, and expand the application range of the equipment, and the first adjusting pin detachably connected in part of the first adjusting holes can quickly fix the position of the main wheel track adjusting plate through connection with adjacent first matching holes, the disassembly and assembly process does not require complex tools, improving the wheel track adjusting efficiency, and ensuring the stability of the position of the main wheel track adjusting plate after adjustment, preventing position deviation caused by load during the test process, ensuring the accuracy of the axial loading force application position, and further improving the reliability of test data.

[0020] The test bench is further provided with a transmission sleeve, the transmission shaft is rotatably connected in the transmission sleeve, the transmission sleeve is provided with a matching plate at the bottom, a plurality of first matching holes are formed in the height direction of the matching plate, the first adjusting structure comprises a main wheel track adjusting plate, a plurality of first adjusting holes are formed in the height direction of the main wheel track adjusting plate, and a first adjusting pin for connecting with adjacent first matching holes is detachably connected in part of the first adjusting holes.

[0021] The technical scheme has the beneficial effects that: the two oppositely arranged auxiliary wheel track adjusting plates can symmetrically support the disassembling plate therebetween, ensure balanced force of the disassembling plate, avoid the disassembling plate from being skewed due to load in the test process, and provide a structural basis for stable installation of the hub bearing to be tested; the second adjusting holes in the two side walls of the disassembling plate along the height direction and the second matching holes in the side walls of the auxiliary wheel track adjusting plate along the height direction form a multi-gear adjusting and adapting structure, the height of the disassembling plate can be flexibly adjusted by selecting different positions of the second adjusting holes and the second matching holes to align, thereby adapting to the wheel track requirements of hub bearings of different specifications, and improving the versatility of the equipment for test samples of multiple specifications; the second adjusting pins detachably connected in some second adjusting holes can quickly realize the fixed connection of the second adjusting holes and the adjacent second matching holes, and the disassembling operation can be completed without complex tools, thereby shortening the test preparation time, and the relative displacement of the disassembling plate and the auxiliary wheel track adjusting plate can be effectively limited after the adjusting pin is locked, thereby preventing the wheel track from deviating during the test, ensuring the accuracy of the position of the axial loading force, and providing a guarantee for the reliability of the test data.

[0022] The present application further provides: the spraying structure comprises a driving pump machine for outputting mud water or salt water and a spray pipe for cooperating with the driving pump machine to spray the mud water or salt water onto the hub bearing to be tested, and the spray pipe is made of a stainless steel bamboo joint pipe.

[0023] The technical scheme has the beneficial effects that: the driving pump machine in the spraying structure can stably output mud water or salt water to provide continuous test medium for environmental simulation, ensure the continuity of environmental simulation, the spray pipe is used for accurately spraying mud water or salt water onto the hub bearing to be tested to meet the spraying requirements of different test positions, the spray pipe is made of a stainless steel bamboo joint pipe, has good corrosion resistance, can adapt to the erosion environment of mud water and salt water, prolong the service life of the spray pipe, the stainless steel bamboo joint pipe can be bent and adjusted at will, the operator can point the spray head to the specified position of the bearing according to the test requirements, improve the spraying accuracy, ensure the authenticity of environmental simulation, adapt to the spraying requirements of bearings of different specifications, and enhance the practicability of the equipment.

[0024] The present application further provides: the driving pump machine comprises a stepping motor and a double-head peristaltic pump, the stepping motor and the double-head peristaltic pump are arranged below the test table and cooperate with each other, and the output end of the double-head peristaltic pump is in communication with the spray pipe.

[0025] The technical scheme has the beneficial effects that: in the above technology, the double-head peristaltic pump is driven by the stepping motor, the stepping motor has high control precision, can flexibly realize starting and stopping of the double-head peristaltic pump, accurately control the output flow of the mud or salt water, improve the precision of environment simulation, meet the requirements of different tests on medium flow, the double-head peristaltic pump can provide double-path medium output, adapt to the requirements of different spraying structures on the equipment, enhance spraying flexibility, the stepping motor and the double-head peristaltic pump are located below the test bench, do not need to occupy the surface space of the test bench, optimize the overall layout of the equipment, make the surface structure of the test bench more compact, improve space utilization, meanwhile, the installation below is convenient for maintenance and repair of the pump in the later period, reduce the difficulty of maintenance operation, and ensure long-term stable operation of the equipment.

[0026] The test box is further provided with a backwater tank, a filter groove is formed in the bottom wall of the inner cavity of the test box and communicates with the backwater tank, the bottom of the test bench is provided with a water storage tank which communicates with the double-head peristaltic pump, and a fine backwater filter is arranged between the bottom of the backwater tank and the water storage tank.

[0027] The technical scheme has the beneficial effects that: in the above technology, the double-head peristaltic pump is driven by the stepping motor, the stepping motor has high control precision, can flexibly realize starting and stopping of the double-head peristaltic pump, accurately control the output flow of the mud or salt water, improve the precision of environment simulation, meet the requirements of different tests on medium flow, the double-head peristaltic pump can provide double-path medium output, adapt to the requirements of different spraying structures on the equipment, enhance spraying flexibility, the stepping motor and the double-head peristaltic pump are located below the test bench, do not need to occupy the surface space of the test bench, optimize the overall layout of the equipment, make the surface structure of the test bench more compact, improve space utilization, meanwhile, the installation below is convenient for maintenance and repair of the pump in the later period, reduce the difficulty of maintenance operation, and ensure long-term stable operation of the equipment. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 is a three-dimensional view of the test bench in the application;

[0029] Figure 2 is a front three-dimensional view of the test bench and the linkage components in the application;

[0030] Figure 3 is a side view of the test bench in the application; Figure 2

[0031] Figure 4 is a three-dimensional view of the floating main shaft, the loading structure and the spraying structure in cooperation in the application;

[0032] Figure 5 is a side sectional view of the floating main shaft and the loading structure in cooperation in the application;

[0033] Figure 6 ​A front sectional view of the floating spindle and the loading structure in the present application. DETAILED DESCRIPTION

[0034] The application provides a combined automobile wheel hub bearing mud water test equipment, which comprises a test table 1, wherein a test box 11 for accommodating an external wheel hub bearing 12 to be tested is arranged on the test table 1, a spraying structure for spraying mud water to the wheel hub bearing 12 to be tested, a floating main shaft 13 and a dismounting plate 14 for connecting with the shaft hole of the wheel hub bearing 12 to be tested are arranged in the test box 11, a dismounting hole 141 for mounting the wheel hub bearing 12 to be tested is formed in the dismounting plate 14, a driving structure for driving the floating main shaft 13 to rotate is arranged on the test table 1, a loading structure for applying axial load or radial load or shaft radial composite load to the floating main shaft 13 is arranged at the bottom of the test box 11, a first adjusting structure for cooperating with the loading structure to adjust the position and direction 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 13 are arranged on the test table 1, a tool sleeve 2 for the floating main shaft 13 to pass through is arranged on the test table 1, a test bearing 21 is connected between the shaft hole inner circumferential wall of the tool sleeve 2 and the outer circumferential wall of the floating main shaft 13, the loading structure comprises a composite loading plate 3, an axial loading cylinder 33 and a radial loading cylinder 35, a connecting plate 22 is arranged on the outer circumferential wall of the tool sleeve 2, the composite loading plate 3 is connected with the connecting plate 22, the output end of the axial loading cylinder 33 is connected with the composite loading plate 3 in linkage and the loading direction of the axial loading cylinder 33 is arranged in the same direction as the axial direction of the floating main shaft 13, the radial loading cylinder 35 is connected with the composite loading plate 3 in linkage and the loading direction of the radial loading cylinder 35 is arranged in the direction perpendicular to the axial direction of the floating main shaft 13, the composite loading plate 3 is composed of a vertical plate 31 and a horizontal plate 32 and the radial section of the composite loading plate 3 is arranged in the shape of an "L" character, the output end of the axial loading cylinder 33 is connected with an axial loading block 331, the axial loading block 331 is provided with an insertion groove 332 for the end of the horizontal plate 32 to insert, a resultant force shaft 321 is rotatably connected between the end of the horizontal plate 32 and the insertion groove 332 and a joint bearing 322 is connected between the resultant force shaft 321 and the axial loading block 331, an oscillation groove 323 is formed in the end of the horizontal plate 32 along the height direction of the horizontal plate 32, an oscillation head 324 is movably arranged in the oscillation groove 323, the resultant force shaft 321 passes through the oscillation head 324, the loading structure further comprises a lever arm 34, the end of the lever arm 34 is rotatably connected with the oscillation head 324 and connected with a rotating pin shaft 341, the output end of the radial loading cylinder 35 is rotatably connected with the beginning of the lever arm 34 and connected with a connecting pin shaft 342, a supporting pin shaft 343 is rotatably connected between the center of the lever arm 34 and the test table 1, a plurality of connecting holes 36 are uniformly distributed on the composite loading plate 3 along the width direction of the composite loading plate 3, a mounting pin 221 is connected with the connecting plate 22 at the position corresponding to any connecting hole 36, a fixed plate 222 is arranged on the bottom wall of the connecting plate 22, a mounting shaft 223 is rotatably connected with the fixed plate 222, a mounting hole 37 is formed in the composite loading plate 3 along the height direction of the composite loading plate 3,The mounting shaft 223 is threadedly connected with the mounting hole 37, the driving structure includes a driving motor 4 arranged on the test table, the floating main shaft 13 is coaxially connected with a transmission shaft 132, the transmission shaft 132 is provided with a belt pulley 131, the driving motor 4 is drivingly connected with the belt pulley 131 through a transmission belt 41, the test table 1 is provided with a transmission sleeve 15, the transmission shaft 132 is rotatably connected in the transmission sleeve 15, the bottom of the transmission sleeve 15 is provided with a matching plate 151, a plurality of first matching holes 152 are formed in the matching plate 151 along the height direction of the matching plate 151, the first adjusting structure includes a main wheel distance adjusting plate 5, a plurality of first adjusting holes 51 are formed in the main wheel distance adjusting plate 5 along the height direction of the main wheel distance adjusting plate 5, and a first adjusting pin 52 for connecting with adjacent first matching holes 152 is detachably connected in part of the first adjusting holes 51, the second adjusting structure includes two sub-wheel distance adjusting plates 53 oppositely arranged in the test box 11, the dismounting plate 14 is between the two sub-wheel distance adjusting plates 53, and a plurality of second adjusting holes 142 are formed in the two side walls of the dismounting plate 14 along the height direction of the dismounting plate, a plurality of second matching holes 531 are formed in the side walls of the two sub-wheel distance adjusting plates 53 along the height direction of the sub-wheel distance adjusting plates 53, and a second adjusting pin for connecting with adjacent second matching holes is detachably connected in part of the second adjusting holes 531, the spraying structure includes a driving pump for outputting mud or salt water and a spray pipe 63 for cooperating with the driving pump to spray the mud or salt water to the test hub bearing 12, the spray pipe 63 is made of a stainless steel bamboo joint pipe, the driving pump includes a stepping motor 6 and a double-head peristaltic pump 61, the stepping motor 6 and the double-head peristaltic pump 61 are arranged below the test table 1 and drivingly cooperate with each other, the output end of the double-head peristaltic pump 61 is in communication with the spray pipe 63, the bottom of the test box 11 is provided with a backwater tank 7, a filter groove 111 in communication with the backwater tank 7 is formed in the bottom wall of the inner cavity of the test box 11, the bottom of the test table 1 is provided with a water storage tank 71 in communication with the double-head peristaltic pump 61, and a fine backwater filter 72 is arranged between the bottom of the backwater tank 7 and the water storage tank 71.

[0035] The overall operation process of the device is as follows:

[0036] 1. Test preparation stage: first, install and fix the test hub bearing through the dismounting hole on the dismounting plate, then connect the bearing shaft hole with the floating main shaft in the test box, ensure the stability of the connection, check the storage amount of mud or salt water in the water storage tank, confirm that the fine backwater filter between the backwater tank and the water storage tank and the filter groove at the bottom of the test box are in normal state, ensure that the medium circulation channel is unobstructed, and check the installation state of the test bearing between the tool sleeve and the floating main shaft to avoid running jam.

[0037] 2. Wheel track adjustment and limiting stage: operate the first adjustment structure, change the relative position of the driving motor and the main wheel track adjustment plate by adjusting the first adjustment pin in the first adjustment hole of the main wheel track adjustment plate, adjust the axial loading force application position and direction, and adapt to the wheel track requirements of the bearing to be tested; after the wheel track is adjusted in place, operate the second adjustment structure, fix the position of the disassembly plate by adjusting the second adjustment pin in the second adjustment hole between the secondary wheel track adjustment plate and the disassembly plate, and then limit the floating spindle to prevent the wheel track from deviating during the test.

[0038] 3. Working condition simulation starting stage: start the driving structure, the driving motor drives the pulley on the floating spindle to rotate through the transmission belt, so that the floating spindle rotates synchronously, and then drives the hub bearing to be tested to rotate, simulates the rotating working condition of the bearing in actual operation; then start the spraying structure, the stepper motor drives the double-head peristaltic pump to rotate, and the mud or salt water in the water storage tank is delivered to the spray pipe made of stainless steel bamboo joint pipe, the angle of the spray pipe is adjusted according to the test requirements, so that the medium is accurately sprayed to the surface of the bearing to be tested, and the actual mud or salt water environment is simulated.

[0039] 4. Load application stage: start the loading structure, if axial load is required, the axial loading cylinder transmits the force to the "L" shaped composite loading plate through the axial loading block and the resultant force shaft, and then transmits the force to the tool sleeve and the floating spindle through the connecting plate, and finally acts on the bearing; if radial load is required, the radial loading cylinder drives the lever arm to rotate around the supporting pin shaft through the connecting pin shaft, and the end of the lever arm transmits the radial force to the swing head through the rotating pin, and then transmits the force to the floating spindle and the bearing through the composite loading plate; if composite load is required, the axial and radial loading cylinders work synchronously, and the load is transmitted after being combined into a composite force by the swing head and the resultant force shaft, simulating the axial and radial composite force in the actual operation of the vehicle.

[0040] 5. Medium circulation and test monitoring stage: the mud or salt water after the test enters the backwater tank through the filter groove in the bottom wall of the test box, is filtered again through the fine backwater filter, and finally returns to the water storage tank for recycling; the bearing running state, load application stability and medium circulation during the test are monitored in real time to ensure that the test parameters meet the set requirements.

[0041] 6. Test end stage: first, stop the loading structure, the spraying structure and the driving structure in turn, then loosen the second adjustment pin and the first adjustment pin, disassemble the hub bearing to be tested, and finally clean the residual medium in the test box and check the state of each part of the equipment to prepare for the next test.

[0042] In the above technology, load sensors can be arranged on the output ends of the axial loading cylinder and the radial loading cylinder to improve the detection efficiency and accuracy. In the above technology, the axial loading cylinder and the radial loading cylinder are both existing technologies, which can be replaced by hydraulic output devices such as air cylinders according to actual requirements.

[0043] In the above technology, in order to improve the simplicity of the test operation, the loading structure, the driving structure and the spraying structure can be controlled by an external industrial computer or an electric control box and other intelligent industrial control equipment, thereby improving the simplicity of the operation, and the intelligent industrial control equipment is the prior art, so the structure and function thereof will not be described in detail.

[0044] In the above technology, in order to improve the test efficiency and precision, at least two groups of opposite test units can be arranged on the test bench, that is, two groups of test boxes and corresponding linkage structures are arranged, thereby realizing a wide range of tests through multiple groups of test units, so as to improve the test efficiency and precision.

[0045] In the above description, in order to improve the neatness of the picture, the connecting pipeline between the spray pipe and the double-head peristaltic pump is not drawn, so as to facilitate understanding, and in the actual production and use process, the pipeline is connected between the spray pipe and the double-head peristaltic pump, so as to realize the transmission and spraying of liquid substances such as mud and brine.

[0046] The basic principles and main features of the present application and the advantages of the present application are shown and described above, and those skilled in the art should understand that the present application is not limited to the above embodiments, and the above embodiments and descriptions in the specification are only to illustrate the principles of the present application, and various changes and improvements can be made without departing from the spirit and scope of the present application, and these changes and improvements all fall within the scope of the present application, and the scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A combined automotive wheel hub bearing mud and water testing device, characterized in that: The system includes a test bench with a test chamber for housing an external wheel hub bearing to be tested. The test chamber contains a spraying structure for spraying mud onto the wheel hub bearing, a floating spindle for connecting to the bearing's shaft hole, and a disassembly plate. The disassembly plate has disassembly holes for installing the external wheel hub bearing. The test bench has a drive structure for driving the floating spindle. The bottom of the test chamber has a loading structure for applying axial load, radial load, or a combined axial and radial load to the floating spindle. The test bench has a first adjustment structure that works in conjunction with the loading structure to adjust the position and direction of the axial load, and a second adjustment structure that works in conjunction with the first adjustment structure to limit the position of the floating spindle. The drive structure includes a drive motor mounted on the test bench. The floating spindle is coaxially connected to a transmission shaft, and the transmission shaft has a pulley. The drive motor is connected to the pulley via a transmission belt. A transmission sleeve is provided on the test bench, and the transmission shaft is rotatably connected in the transmission sleeve. A mating plate is provided at the bottom of the transmission sleeve, and a plurality of first mating holes are formed on the mating plate along its height direction. The first adjustment structure includes a main wheel track adjustment plate, and a plurality of first adjustment holes are formed on the main wheel track adjustment plate along its height direction. A first adjustment pin for connecting with an adjacent first mating hole is detachably connected to some of the first adjustment holes. The second adjustment structure includes two secondary wheel track adjustment plates arranged opposite each other in the test chamber. A disassembly plate is located between the two secondary wheel track adjustment plates, and a plurality of second adjustment holes are formed on both sides of the disassembly plate along its height direction. A plurality of second mating holes are formed on the side walls of the two secondary wheel track adjustment plates along their height direction, and a second adjustment pin for connecting with an adjacent second mating hole is detachably connected to some of the second adjustment holes.

2. The combined automotive wheel hub bearing mud and water testing equipment according to claim 1, characterized in that: The test bench is equipped with a tooling sleeve for the floating spindle to pass through. A test bearing is connected between the inner circumferential wall of the shaft hole of the tooling sleeve and the outer circumferential 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 circumferential 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 load applied by the axial loading cylinder is in the same direction as the axis of the floating spindle. The radial loading cylinder is linked with the composite loading plate, and the load applied by the radial loading cylinder is perpendicular to the axis of the floating spindle.

3. The combined automotive wheel hub bearing mud and water testing equipment according to claim 2, characterized in that: The composite loading plate is composed of vertical and horizontal plates connected to each other, and the radial cross section of the composite loading plate is arranged in an "L" shape. The output end of the axial loading cylinder is connected to an axial loading block. The axial loading block has a slot for the end of the horizontal plate to be inserted. The end of the horizontal plate is rotatably connected to the slot with a resultant force shaft, and a joint bearing is connected between the resultant force shaft and the axial loading block. The end of the horizontal plate has a swing groove along its height direction. A swing head is movably arranged in the swing groove. The resultant force shaft passes through the swing head. The loading structure also includes a lever arm. The end of the lever arm is rotatably connected to the swing head and connected to a rotating pin. The output end of the radial loading cylinder is rotatably connected to the beginning end of the lever arm and connected to a connecting pin. A support pin is rotatably connected between the center of the lever arm and the test bench.

4. The combined automotive wheel hub bearing mud and water testing equipment according to claim 3, characterized in that: The composite loading plate has a plurality of connecting holes evenly distributed along its width direction. A mounting pin is connected to any connecting hole position 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.

5. The combined automotive wheel hub bearing mud and water testing equipment according to claim 1, characterized in that: The spraying structure includes a drive pump for outputting mud or brine and a spray nozzle that works in conjunction with the drive pump to spray mud or brine onto the wheel hub bearing to be tested. The spray nozzle is made of stainless steel bamboo tube.

6. The combined automotive wheel hub bearing mud and water testing equipment according to claim 5, characterized in that: The drive pump includes a stepper motor and a dual-head peristaltic pump. The stepper motor and the dual-head peristaltic pump are located below the test bench and are linked together. The output end of the dual-head peristaltic pump is connected to the nozzle.

7. The combined automotive wheel hub bearing mud and water testing equipment according to claim 6, characterized in that: The test chamber is equipped with a return water tank at the bottom, and a filter groove communicating with the return water tank is opened on the bottom wall of the inner cavity of the test chamber. The test bench is equipped with a water storage tank communicating with a dual-head peristaltic pump at the bottom, and a fine return water filter is installed between the bottom of the return water tank and the water storage tank.

Images