A kind of vehicle wheel hub bearing endurance performance detection equipment

Abstract

The application discloses a kind of vehicle wheel hub bearing endurance performance detection equipment, it is related to bearing test technical field, including test table, drive motor is installed on the test table, and the output of drive motor is provided with the shaft, bearing test unit is also installed on the test table with the concentric arrangement of shaft;Wherein, the bearing test unit includes: No. 1 module chamber and No. 2 module chamber, and the output of the shaft is penetrated to the inside of No. 1 module chamber, in the application, by the cooperation of drive mechanism and pressing assembly, No. 1 oil groove and No. 2 oil groove on inner ring barrel are changed from initial misplacement to face and conduct, and centrifugal force generated by lubricating oil is driven by bearing inner ring rotation, realizes wheel hub bearing lubricating oil standardization, gradient, time sequence controllable quantitative attenuation degradation test.

Description

Technical Field

[0001] This invention belongs to the field of bearing testing technology, specifically a device for testing the durability performance of automotive wheel hub bearings. Background Technology

[0002] With the rapid development of the new energy electric vehicle industry, the design of lightweight, high-speed, and long-range vehicles is constantly being upgraded. As the core basic component for wheel rotation bearing and guidance, automotive wheel bearings are subjected to harsh operating conditions of high-speed alternation, high load, and long duration. Their durability and wear stability directly determine the driving safety, ride comfort, and service life of electric vehicles. Therefore, conducting high-precision and high-fitting wheel bearing durability tests is a core key link in ensuring the reliability of electric vehicles.

[0003] During actual vehicle operation, the lubrication state of the internal lubricating medium directly affects the wear rate, fatigue life, and failure mode of the bearing friction pair. Sufficient and stable lubrication can effectively reduce the contact friction and temperature rise between the steel balls and the raceway and cage, and suppress early failure problems such as microcracks, pitting, and spalling.

[0004] Existing durability testing equipment for automotive wheel bearings has inherent structural defects in lubrication condition simulation testing. Current industry-standard durability testing relies solely on the centrifugal force generated by the bearing's high-speed rotation to allow lubricating oil to naturally detach and migrate, without intervention or constraint on the lubrication loss process. This results in a completely random, disordered, and unpredictable passive wear state during lubrication degradation. Consequently, it is impossible to uniformly control the lubricating oil loss rate, leading to significant differences in the lubrication degradation process among different test batches and samples. This directly causes technical problems such as large dispersion in durability test data and the inability to reproduce test conditions. Summary of the Invention

[0005] To address the problems mentioned in the background art, this invention proposes a durability testing device for automotive wheel hub bearings.

[0006] The objective of this invention can be achieved through the following technical solutions: A durability testing device for automotive wheel hub bearings includes a test bench, on which a drive motor is mounted and a rotating shaft is provided at the output end of the drive motor. A bearing testing unit arranged co-centered with the rotating shaft is also mounted on the test bench. The bearing testing unit includes: The first module chamber and the second module chamber, and the output end of the rotating shaft extends through the inside of the first module chamber; A lubricating oil release assembly is installed inside the second module chamber. The lubricating oil release assembly includes an outer ring cylinder and an inner ring cylinder concentrically located inside the outer ring cylinder. A fitting block that fits against the outer wall of the inner ring cylinder is fixedly installed on the inner side of the outer ring cylinder. A second oil groove is opened through the outer ring cylinder and the fitting block. A first oil groove is opened on the inner ring cylinder. A drive mechanism is installed between the outer ring cylinder and the inner ring cylinder. A clamping assembly for clamping the bearing is installed on the inner side of the inner ring cylinder. The pressing component is located inside the chamber of module one and is used to automatically drive the drive mechanism to rotate the outer ring cylinder relative to the inner ring cylinder until the position of oil tank two is directly opposite oil tank one. The test bench is also equipped with a vacuum pump for evacuating the sealed space of the No. 1 module chamber and the No. 2 module chamber.

[0007] As a further preferred embodiment of this technical solution: the first module chamber is fixedly installed on the top surface of the test bench, and the second module chamber is movably installed on the top surface of the test bench. By moving the second module chamber and docking with the first module chamber, a sealed space is formed. The first module chamber is provided with a sealing plate inside. The outer wall of the sealing plate is sealed and adapted to the inner wall of the inner ring cylinder. The sealing plate is used to form two spaces on the inner and outer sides of the inner ring cylinder. The outer ring cylinder is rotatably mounted on the inner wall of the second module chamber, and the inner ring cylinder is fixedly mounted on the inner wall of the second module chamber.

[0008] As a further preferred embodiment of this technical solution: the driving mechanism includes: A fixed inclined protrusion is fixedly connected to the outer wall of the inner ring cylinder, and a sliding groove is provided on the inclined surface of the fixed inclined protrusion; A movable inclined protrusion is attached to a fixed inclined protrusion, and a rectangular slider is provided on the movable inclined protrusion and slidably arranged inside the groove. A roller is rotatably provided on the side of the movable inclined protrusion. A connecting block is fixedly connected to the outer ring cylinder. A V-shaped frame is rotatably mounted on the connecting block. A track groove is opened on the V-shaped frame, and the roller is movably mounted on the inner side of the track groove.

[0009] As a further preferred embodiment of this technical solution: the pressing component includes: The turntable is fixedly connected to the rotating shaft. An arc-shaped sleeve is connected to a turntable via a connecting frame, and an arc-shaped slider is slidably arranged on the inner side of the arc-shaped sleeve. The top surface of the arc-shaped slider is covered with teeth arranged in an equidistant array. A connecting shaft is rotatably mounted on an arc-shaped sleeve, and a drive motor for driving the connecting shaft to rotate is mounted on the arc-shaped sleeve. A gear that meshes with teeth is fixedly connected to the connecting shaft.

[0010] As a further preferred embodiment of this technical solution: the bearing testing unit further includes: An extension frame is fixedly connected to a movable inclined protrusion, and a sliding shaft is fixedly connected to the inner ring cylinder. The extension frame is sleeved on the outside of the sliding shaft, and a guide block is also fixed on the sliding shaft. A guide groove for the guide block to slide is provided on the extension frame. The return spring is sleeved on the outside of the slide shaft and located between the extension frame and the inner ring cylinder.

[0011] As a further preferred embodiment of this technical solution: the clamping assembly includes: The ring sleeve is connected to the inner wall of the inner ring cylinder by a connecting post, and the inner ring cylinder is provided with a movable groove for the connecting post to move. Several wedge-shaped blocks are arranged in an array on the inner side wall of the ring sleeve. The clamping ring is located inside the ring sleeve and is fixedly connected to the inner wall of the second module chamber by a fixing plate. The clamping ring is provided with several movable shafts that cooperate with the wedge blocks one by one. The mating surfaces of the movable shafts and the wedge blocks are all inclined surfaces. A clamping block is provided on the side of the movable shaft away from the wedge block. A spring sleeve post is provided between the movable shaft and the clamping ring.

[0012] As a further preferred embodiment of this technical solution: the clamping assembly further includes: The locking mechanism includes a first threaded sleeve fixedly connected to the outer wall of the ring sleeve, a fixing bolt threadedly connected to the first threaded sleeve, and two second threaded sleeves provided on the inner wall of the second module chamber, the first threaded sleeve being threadedly connected to the second threaded sleeve.

[0013] As a further preferred embodiment of this technical solution: the vacuum pump is provided with an air pipe, the end of which, away from the vacuum pump, passes through the interior of the first module chamber and is located in the gap between the first module chamber and the sealing plate.

[0014] As a further preferred embodiment of this technical solution: the bearing testing unit further includes: The driving assembly includes a fixed block fixedly installed on the top surface of the test bench, an electric push rod is provided on the fixed block, the output end of the electric push rod is fixedly connected to the outer wall of the second module chamber, and a slide rail is also provided on the top surface of the test bench, and a slide seat is provided on the outer wall of the second module chamber, the slide seat being slidably mounted on the slide rail.

[0015] As a further preferred embodiment of this technical solution: sealing strips are provided on the opening ends of both the No. 1 module chamber and the No. 2 module chamber to improve the sealing performance after the No. 1 module chamber and the No. 2 module chamber are connected.

[0016] Compared with the prior art, the beneficial effects of the present invention are: 1. In this invention, through the cooperation of the drive mechanism and the pressing component, the first and second oil grooves on the inner ring cylinder are changed from initial misalignment to direct connection. With the help of the centrifugal force generated by the rotation of the inner ring of the bearing driving the lubricating oil, a standardized, gradient, and time-controllable quantitative decay and deterioration test of the wheel hub bearing lubricating oil is realized. This solves the problem that bearing durability testing can only rely on the bearing's rotation to achieve random, disordered, and irregular natural shedding and migration of lubricating oil. The loss rate of each test is completely uncontrollable, and the test data has large dispersion and cannot be reproduced.

[0017] 2. In this invention, a negative pressure environment is created on the outside of the inner ring cylinder by vacuum pumping, forming a stable pressure difference with the lubrication space inside the bearing. When the oil groove is open, the air pressure difference is used to assist the lubricating oil to be discharged out at a uniform speed and smoothly, weakening the interference of speed fluctuations on lubrication deterioration, and making the lubricating oil degradation process more uniform and linear.

[0018] 3. In this invention, by controlling the rotation of the gears through the drive motor, the extension length of the arc-shaped slider can be flexibly adjusted, and the action time of the pressing component squeezing the drive mechanism can be precisely controlled, thereby controlling the effective time of the single-turn oil groove conduction, realizing the precise adjustment of the amount of lubricating oil thrown out, and simulating various real vehicle lubrication deterioration conditions such as low-speed slow decay and high-speed fast decay.

[0019] 4. In this invention, a sealed space is formed by sealing and connecting the first module chamber and the second module chamber. With the help of vacuum pretreatment, dust and excess air in the chamber are removed, which prevents impurities from entering the lubrication system and eliminates the problem of air oxidation accelerating the deterioration of lubricating oil. This ensures that bearing wear and lubricating oil deterioration during the test are caused by pure mechanical fatigue, and further improves the accuracy and authenticity of the durability test results. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a partial structural schematic diagram of the bearing testing unit of the present invention; Figure 3 This is a cross-sectional view of the first module chamber of the present invention; Figure 4 This is a partial structural cross-sectional view of the pressing component of the present invention; Figure 5 for Figure 4 Schematic diagram of the structure at point A in the middle; Figure 6 This is a schematic diagram of the structure of the driving assembly, clamping assembly, and lubricating oil release assembly of the present invention; Figure 7 This is a schematic diagram of the structure of the lubricating oil release assembly of the present invention; Figure 8 for Figure 7 Schematic diagram of the structure at point B; Figure 9 This is a partial exploded view of the bearing testing unit of the present invention; Figure 10 This is a schematic diagram of the clamping assembly of the present invention.

[0021] Legend: 1. Test bench; 2. Drive motor; 21. Rotating shaft; 3. Vacuum pump; 4. Bearing test unit; 41. Module 1 chamber; 42. Sealing strip; 43. Sealing plate; 44. Pressing assembly; 441. Turntable; 442. Connecting frame; 443. Arc-shaped sleeve; 444. Arc-shaped slider; 445. Tooth; 446. Connecting shaft; 447. Gear; 45. Module 2 chamber; 46. Driving assembly; 461. Fixing block; 462. Slide seat; 463. Slide rail; 47. Clamping assembly; 471. Connecting column; 472. Ring; 473. Wedge block; 47 4. Movable shaft; 475. Spring sleeve post; 476. Clamping block; 477. No. 1 threaded sleeve; 478. Fixing bolt; 479. No. 2 threaded sleeve; 4710. Fixing plate; 48. Lubricating oil release assembly; 481. Outer ring cylinder; 482. Inner ring cylinder; 4821. No. 1 oil groove; 483. Adhesive block; 4831. No. 2 oil groove; 484. Fixing inclined protrusion; 4841. Slide groove; 485. Movable inclined protrusion; 486. Roller; 487. V-shaped frame; 4871. Track groove; 488. Connecting block; 489. Extension frame; 4810. Sliding shaft; 4811. Return spring. Detailed Implementation

[0022] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Please see Figure 1 - Figure 10 This application provides a durability testing device for automotive wheel hub bearings, including a test bench 1. A drive motor 2 is installed on the test bench 1, and a rotating shaft 21 is provided at the output end of the drive motor 2. The drive motor 2 is used to drive the rotating shaft 21 to rotate at high speed, providing a power source for testing the durability performance of the bearing installed at the end of the rotating shaft 21. It should be noted that the bearing is installed between the rotating shaft 21 and the bearing testing unit 4, and the output end of the rotating shaft 21 has a spline structure, which can form a stable transmission with the bearing. The test bench 1 is also equipped with a bearing testing unit 4 arranged co-centered with the rotating shaft 21. The bearing testing unit 4 includes: The first module chamber 41 and the second module chamber 45, and the output end of the rotating shaft 21 extends through the inside of the first module chamber 41; A lubricating oil release assembly 48 is installed inside the second module chamber 45. The lubricating oil release assembly 48 includes an outer ring cylinder 481 and an inner ring cylinder 482 concentrically located inside the outer ring cylinder 481. A fitting block 483, which fits against the outer wall of the inner ring cylinder 482, is fixedly installed on the inner side of the outer ring cylinder 481. A second oil groove 4831 is formed through the outer ring cylinder 481 and the fitting block 483. A first oil groove 4821 is formed on the inner ring cylinder 482. It should be noted that the first oil tank 4821 and the second oil tank 4831 are initially misaligned (not directly opposite each other). A drive mechanism is installed between the outer ring cylinder 481 and the inner ring cylinder 482 to drive the outer ring cylinder 481 to rotate relative to the inner ring cylinder 482. A clamping assembly 47 for clamping the bearing is installed on the inner side of the inner ring cylinder 482. It should be noted that the clamping assembly 47 is preferably detachable and can be replaced according to different sizes of automotive wheel hub bearings. The pressing component 44 is located inside the first module chamber 41 and is used to automatically drive the drive mechanism to rotate the outer ring cylinder 481 relative to the inner ring cylinder 482 until the second oil tank 4831 is directly opposite the first oil tank 4821. The test bench 1 is also equipped with a vacuum pump 3 for evacuating the sealed space of the first module chamber 41 and the second module chamber 45.

[0024] Specifically, the bearing is first fixedly installed inside the clamping assembly 47, co-centered with the rotating shaft 21. Then, the second module chamber 45 is driven to dock with the first module chamber 41 to form a sealed space. The bearing is sealed in the space formed inside the inner ring cylinder 482. Lubricating oil is then injected into the space containing the bearing. This allows for a more realistic simulation of the durability performance of automotive wheel hub bearings under lubrication conditions during testing. Subsequently, the drive motor 2 drives the rotating shaft 21 to rotate. The rotating shaft 21 drives the inner ring of the bearing to rotate, while the outer ring is fixed by the clamping assembly 47. During this process, the rotating shaft 21 can drive the pressing assembly inside the first module chamber 41. 44 rotates, and the pressing component 44 forces the first oil groove 4821 on the inner ring cylinder 482 to be aligned with the second oil groove 4831 on the fitting block 483 and the outer ring cylinder 481 through the squeezing and driving mechanism, thereby forming a channel. Before this, the vacuum pump 3 extracts the air outside the outer ring cylinder 481 and creates a pressure difference with the space inside the inner ring cylinder 482, allowing the lubricating oil inside the inner ring cylinder 482 to be thrown out in an orderly manner. This can achieve a gradient decay of lubrication amount and avoid the problems of random, disordered, and non-fixed gradient lubrication oil loss. The degradation rate and grease deficiency location are completely different in each test, and the test data has extremely high dispersion, making it impossible to standardize and reproduce.

[0025] Furthermore, the first module chamber 41 is fixedly installed on the top surface of the test bench 1, and the second module chamber 45 is movably installed on the top surface of the test bench 1. By moving the second module chamber 45 and docking it with the first module chamber 41, a sealed space is formed. The first module chamber 41 is provided with a sealing plate 43 inside. The outer wall of the sealing plate 43 is sealed and adapted to the inner wall of the inner ring cylinder 482. The sealing plate 43 is used to form two spaces on the inner and outer sides of the inner ring cylinder 482. The bearing is installed on the inner side of the inner ring cylinder 482. The outer ring cylinder 481 is rotatably mounted on the inner wall of the second module chamber 45, and the inner ring cylinder 482 is fixedly mounted on the inner wall of the second module chamber 45.

[0026] Furthermore, the driving mechanism includes: A fixed inclined protrusion 484 is fixedly connected to the outer wall of the inner ring cylinder 482, and a sliding groove 4841 is provided on the inclined surface of the fixed inclined protrusion 484; The movable inclined protrusion 485 is attached to the fixed inclined protrusion 484, and the movable inclined protrusion 485 is provided with a rectangular slider that is slidably arranged inside the slide groove 4841, and a roller 486 is rotatably provided on the side of the movable inclined protrusion 485. A connecting block 488 is fixedly connected to an outer ring cylinder 481. A V-shaped frame 487 is rotatably mounted on the connecting block 488. A track groove 4871 is provided on the V-shaped frame 487. A roller 486 is movably mounted on the inner side of the track groove 4871.

[0027] Specifically, by pressing the inclined surface of the movable inclined protrusion 485 by the pressing component 44, and since the fixed inclined protrusion 484 is fixedly connected to the inner ring cylinder 482, the movable inclined protrusion 485 is forced to slide downward relative to the fixed inclined protrusion 484. The movable inclined protrusion 485 drives the extension frame 489 and the roller 486 to move downward at the same time, and then drives the connecting block 488 to move through the V-shaped frame 487, and realizes the rotation of the outer ring cylinder 481 so that the second oil groove 4831 on the outer ring cylinder 481 and the fitting block 483 are aligned with the first oil groove 4821. In this gap, the lubricating oil inside the inner ring cylinder 482 (that is, the lubricating oil wrapped around the bearing) is thrown out to the outside of the outer ring cylinder 481. After that, the pressing component 44 is disengaged from the surface of the movable inclined protrusion 485, and the lubricating oil can no longer be thrown out.

[0028] Furthermore, the pressing component 44 includes: Turntable 441 is fixedly connected to rotating shaft 21. The arc-shaped sleeve 443 is connected to the turntable 441 via the connecting bracket 442. It should be noted that the drive motor 2 is a servo motor, which is controlled by the encoder controller to always stop the rotating shaft 21 at the initial position each time, thereby ensuring that the pressing component 44 will not interfere when installing the bearing. The inner side of the arc-shaped sleeve 443 is slidably provided with an arc-shaped slider 444. It should be noted that a pulley can be selectively installed between the arc-shaped sleeve 443 and the arc-shaped slider 444 to reduce the friction between the arc-shaped sleeve 443 and the arc-shaped slider 444 and reduce the work done by the drive motor. The top surface of the arc-shaped slider 444 is covered with teeth 445 evenly spaced. A connecting shaft 446 is rotatably mounted on an arc-shaped sleeve 443, and a drive motor for driving the connecting shaft 446 to rotate is mounted on the arc-shaped sleeve 443. A gear 447 that meshes with teeth 445 is fixedly connected to the connecting shaft 446.

[0029] Specifically, the drive motor drives the connecting shaft 446 to rotate, the connecting shaft 446 drives the gear 447 to rotate, and the rotation of the gear 447 drives the arc-shaped slider 444 to move relative to the arc-shaped sleeve 443, thereby adjusting its overall length, which means controlling the time of pressing the movable inclined protrusion 485, and thus controlling the amount of lubricating oil thrown out when the rotating shaft 21 rotates one revolution.

[0030] Furthermore, the bearing testing unit 4 also includes: An extension frame 489 is fixedly connected to a movable inclined protrusion 485, and a sliding shaft 4810 is fixedly connected to the inner ring cylinder 482. The extension frame 489 is sleeved on the outside of the sliding shaft 4810. A guide block is also fixed on the sliding shaft 4810. The extension frame 489 is provided with a guide groove for the guide block to slide. During the downward movement of the movable inclined protrusion 485, the guide block slides inside the guide groove to maintain the connection. The reset spring 4811 is sleeved on the outside of the sliding shaft 4810 and located between the extension frame 489 and the inner ring cylinder 482. It plays a reset role and can drive the movable inclined protrusion 485 to move upward after the movable inclined protrusion 485 moves downward. It should also be noted that a spring (not shown in the figure) is also connected between the outer ring cylinder 481 and the second module chamber 45 to facilitate the reset of the outer ring cylinder 481.

[0031] Furthermore, the clamping assembly 47 includes: The ring sleeve 472 is connected to the inner wall of the inner ring cylinder 482 by the connecting post 471, and the inner ring cylinder 482 is provided with a movable groove for the connecting post 471 to move. Several wedge blocks 473 are arranged in an array on the inner side wall of the ring sleeve 472. A clamping ring, located inside the ring sleeve 472, is fixedly connected to the inner wall of the second module chamber 45 via a fixing plate 4710. The clamping ring has several movable shafts 474 that mate with wedge blocks 473. The mating surfaces of the movable shafts 474 and the wedge blocks 473 are both inclined surfaces. A clamping block 476 is provided on the side of the movable shaft 474 away from the wedge blocks 473. It should be noted that the clamping block 476 is preferably made of rubber to avoid hard impact with the bearing. It should also be noted that... The clamping block 476 has an inclined surface on the side near the first module chamber 41. During the installation of the bearing, the inclined surface structure makes it easier for the bearing to enter the clamping surface for pre-fixation. Furthermore, a spring sleeve post 475 is provided between the movable shaft 474 and the clamping ring. It should be noted that the spring sleeve post 475 is a combination of an outer cylinder and a spring. The spring is located inside the spring sleeve post 475, with one end connected to the outer cylinder and the other end connected to the outer wall of the movable shaft 474, which plays a role in elastic compression.

[0032] Furthermore, the clamping assembly 47 also includes: The locking mechanism includes a first threaded sleeve 477 fixedly connected to the outer wall of the ring sleeve 472, a fixing bolt 478 threadedly connected to the first threaded sleeve 477, and two second threaded sleeves 479 provided on the inner wall of the second module chamber 45, the first threaded sleeve 477 being threadedly connected to the second threaded sleeves 479.

[0033] Furthermore, the vacuum pump 3 is equipped with an air pipe. The end of the air pipe away from the vacuum pump 3 passes through the interior of the first module chamber 41 and is located in the gap between the first module chamber 41 and the sealing plate 43. By drawing a vacuum through the vacuum pump 3, the air pressure in the space formed between the sealing plate 43 and the outer side of the inner ring cylinder 482 can be reduced, creating a pressure difference with the space formed between the sealing plate 43 and the inner side of the inner ring cylinder 482.

[0034] Furthermore, the bearing testing unit 4 also includes: The driving assembly 46 includes a fixed block 461 fixedly installed on the top surface of the test bench 1. An electric push rod is provided on the fixed block 461. The output end of the electric push rod is fixedly connected to the outer wall of the second module chamber 45. A slide rail 463 is also provided on the top surface of the test bench 1. A slide seat 462 is provided on the outer wall of the second module chamber 45. The slide seat 462 is slidably mounted on the slide rail 463. The cooperation between the slide seat 462 and the slide rail 463 is to facilitate guidance and prevent the second module chamber 45 from deviating.

[0035] Specifically, by driving the slide block 462 and the second module chamber 45 on it to move towards the first module chamber 41 through the electric push rod, the docking and separation of the second module chamber 45 and the first module chamber 41 can be realized. During the separation process, it is convenient to install the bearing, and after docking, a sealed space can be formed.

[0036] Furthermore, sealing strips 42 are provided on the opening ends of both the first module chamber 41 and the second module chamber 45 to improve the sealing performance after the first module chamber 41 and the second module chamber 45 are connected.

[0037] The above embodiments are only used to illustrate the technical methods of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical methods of the present invention without departing from the spirit and scope of the technical methods of the present invention.

Claims

1. A durability testing device for automotive wheel hub bearings, comprising a test bench (1), characterized in that: The test bench (1) is equipped with a drive motor (2), and the output end of the drive motor (2) is provided with a rotating shaft (21). The test bench (1) is also equipped with a bearing test unit (4) arranged in the same center as the rotating shaft (21). The bearing testing unit (4) includes: The first module chamber (41) and the second module chamber (45) are connected, and the output end of the rotating shaft (21) extends through the inside of the first module chamber (41); A lubricating oil release assembly (48) is installed inside the second module chamber (45). The lubricating oil release assembly (48) includes an outer ring cylinder (481) and an inner ring cylinder (482) concentrically located inside the outer ring cylinder (481). A fitting block (483) that fits against the outer wall of the inner ring cylinder (482) is fixedly installed on the inner side of the outer ring cylinder (481). A second oil groove (4831) is opened through the outer ring cylinder (481) and the fitting block (483). A first oil groove (4821) is opened on the inner ring cylinder (482). A drive mechanism is installed between the outer ring cylinder (481) and the inner ring cylinder (482). A clamping assembly (47) for clamping the bearing is installed on the inner side of the inner ring cylinder (482). The pressing component (44) is located inside the first module chamber (41) and is used to automatically drive the drive mechanism to rotate the outer ring cylinder (481) relative to the inner ring cylinder (482) to the position where the second oil tank (4831) is directly opposite the first oil tank (4821). The test bench (1) is also equipped with a vacuum pump (3) for evacuating the sealed space of the first module chamber (41) and the second module chamber (45).

2. The vehicle wheel hub bearing durability testing equipment according to claim 1, characterized in that, The first module chamber (41) is fixedly installed on the top surface of the test bench (1), and the second module chamber (45) is movably installed on the top surface of the test bench (1). By moving the second module chamber (45) and docking with the first module chamber (41), a sealed space is formed. The first module chamber (41) is provided with a sealing plate (43). The outer wall of the sealing plate (43) is sealed and adapted to the inner wall of the inner ring cylinder (482). The sealing plate (43) is used to form two spaces on the inner and outer sides of the inner ring cylinder (482). The outer ring cylinder (481) is rotatably mounted on the inner wall of the second module chamber (45), and the inner ring cylinder (482) is fixedly mounted on the inner wall of the second module chamber (45).

3. The vehicle wheel hub bearing durability testing equipment according to claim 1, characterized in that, The drive mechanism includes: A fixed inclined protrusion (484) is fixedly connected to the outer wall of the inner ring cylinder (482), and a groove (4841) is provided on the inclined surface of the fixed inclined protrusion (484). The movable inclined protrusion (485) is attached to the fixed inclined protrusion (484), and the movable inclined protrusion (485) is provided with a rectangular slider that is slidably arranged inside the slide groove (4841), and a roller (486) is rotatably provided on the side of the movable inclined protrusion (485). A connecting block (488) is fixedly connected to an outer ring cylinder (481). A V-shaped frame (487) is rotatably provided on the connecting block (488). A track groove (4871) is provided on the V-shaped frame (487). A roller (486) is movably provided inside the track groove (4871).

4. The vehicle wheel hub bearing durability testing equipment according to claim 1, characterized in that, The pressing component (44) includes: Turntable (441) is fixedly connected to the rotating shaft (21). An arc-shaped sleeve (443) is connected to a turntable (441) via a connecting bracket (442), and an arc-shaped slider (444) is slidably provided on the inner side of the arc-shaped sleeve (443). The top surface of the arc-shaped slider (444) is covered with teeth (445) arranged in an equidistant array. A connecting shaft (446) is rotatably mounted on an arc-shaped sleeve (443), and a drive motor for driving the connecting shaft (446) to rotate is mounted on the arc-shaped sleeve (443). A gear (447) that meshes with teeth (445) is fixedly connected to the connecting shaft (446).

5. The vehicle wheel hub bearing durability testing equipment according to claim 1, characterized in that, The bearing testing unit (4) also includes: An extension frame (489) is fixedly connected to a movable inclined protrusion (485), and a sliding shaft (4810) is fixedly connected to the inner ring cylinder (482). The extension frame (489) is sleeved on the outside of the sliding shaft (4810). A guide block is also fixed on the sliding shaft (4810). A guide groove for the guide block to slide is provided on the extension frame (489). The return spring (4811) is sleeved on the outside of the slide shaft (4810) and located between the extension frame (489) and the inner ring cylinder (482).

6. The vehicle wheel hub bearing durability testing equipment according to claim 1, characterized in that, The clamping assembly (47) includes: The ring sleeve (472) is connected to the inner wall of the inner ring cylinder (482) by the connecting column (471), and the inner ring cylinder (482) is provided with a movable groove for the connecting column (471) to move. Several wedge blocks (473) are arranged in an array on the inner side wall of the ring sleeve (472). The clamping ring is located inside the ring sleeve (472) and is fixedly connected to the inner wall of the second module chamber (45) by a fixing plate (4710). The clamping ring is provided with a number of movable shafts (474) that cooperate with the wedge blocks (473). The mating surfaces of the movable shafts (474) and the wedge blocks (473) are all inclined surfaces. A clamping block (476) is provided on the side of the movable shaft (474) away from the wedge blocks (473). A spring sleeve post (475) is provided between the movable shaft (474) and the clamping ring.

7. The vehicle wheel hub bearing durability testing equipment according to claim 6, characterized in that, The clamping assembly (47) further includes: The locking mechanism includes a first threaded sleeve (477) fixedly connected to the outer wall of the ring sleeve (472), a fixing bolt (478) threadedly connected to the first threaded sleeve (477), and two second threaded sleeves (479) provided on the inner wall of the second module chamber (45), the first threaded sleeve (477) being threadedly connected to the second threaded sleeve (479).

8. The vehicle wheel hub bearing durability testing equipment according to claim 1, characterized in that, The vacuum pump (3) is equipped with an air pipe. The end of the air pipe away from the vacuum pump (3) passes through the interior of the first module chamber (41) and is located in the gap between the first module chamber (41) and the sealing plate (43).

9. The vehicle wheel hub bearing durability testing equipment according to claim 1, characterized in that, The bearing testing unit (4) also includes: The driving assembly (46) includes a fixed block (461) fixedly installed on the top surface of the test bench (1). An electric push rod is provided on the fixed block (461). The output end of the electric push rod is fixedly connected to the outer wall of the second module chamber (45). A slide rail (463) is also provided on the top surface of the test bench (1). A slide seat (462) is provided on the outer wall of the second module chamber (45). The slide seat (462) is slidably arranged on the slide rail (463).

10. The vehicle wheel hub bearing durability testing equipment according to claim 1, characterized in that, Both the No. 1 module chamber (41) and the No. 2 module chamber (45) are provided with sealing strips (42) to improve the sealing performance after the No. 1 module chamber (41) and the No. 2 module chamber (45) are connected.

Images