A bearing life limit load test bench

Abstract

The present invention relates to the field of bearing testing technology, specifically to a bearing life limit load test bench, comprising a test bench and a mounting seat fixed to one side of the test bench, a dual-axis motor being fixedly mounted on the outer surface of the mounting seat, a clamping structure connected to the dual-axis motor being provided on the side of the mounting seat close to the test bench, and a centrifugal lifting structure, an extrusion structure and a watering device being provided on the outside of the mounting seat; the centrifugal lifting structure comprises a rotating shaft, a swing seat, a sliding sleeve, a rotating sleeve, a swing arm, a connecting rod and a sphere. The present invention can not only perform conventional rotation tests on bearings, but also simulate the load conditions in actual use through the design of centrifugal force and swing arms, so that the test is closer to the actual working conditions, and the test function in a wet environment is added. Through a pump body, a connecting pipe and a nozzle system, the wear resistance and waterproof performance of the bearing in a wet or humid environment can be tested, so that the test results are more comprehensive and accurate.

Description

Technical Field

[0001] The invention relates to a bearing life limit load test bench, in particular to a bearing life limit load test bench, and belongs to the technical field of bearing testing. Background Art

[0002] Bearings are an important component in mechanical equipment. Their main function is to support mechanical rotating bodies, reduce the friction coefficient during movement, and ensure their rotation accuracy. Bearings play an irreplaceable role in the transmission of torque power in both heavy and light industries. Once bearings are damaged, serious consequences may occur. Therefore, it is necessary to test and evaluate the stress conditions of the bearings. There are many types of bearings, and different types of bearings have different sizes. When testing bearings, the inner ring of the bearing needs to be fixed. Existing testing devices cannot quickly fix bearings of various types, and their versatility is poor.

[0003] Chinese patent CN222124737U discloses "a bearing testing device, comprising a base plate and a bearing body, a power frame and two sets of load frames are arranged on the base plate, a laser distance sensor is installed on the top of the power frame, a motor is installed on one side of the power frame, the output shaft of the motor is connected to the drive frame, the drive frame is connected to the shaft mechanism, the shaft mechanism comprises a base plate, a first support member and a second support member are arranged on the base plate, and a conical adjustment block is arranged between the first support member and the second support member, a screw is arranged at one end of the conical adjustment block, and the bearing body is sleeved on the shaft mechanism;

[0004] The above patent has the following defects: the hydraulic cylinder drives the pressure plate to fit tightly against the outer ring of the bearing through a pressure sensor to simulate the load in actual use. However, the stability of the hydraulic system may be affected by factors such as oil temperature and pressure fluctuations, causing the load force to change during the test. In the current test method, the speed and load force are two independent control parameters. Although the driving force and load force can be controlled separately by adjusting the motor speed and the hydraulic cylinder pressure, the matching relationship between the two may not be ideal. This may result in the force on the bearing during the test not fully matching its stress state in actual use.

[0005] Therefore, there is an urgent need to improve the bearing testing equipment to solve the above-mentioned problems. Summary of the invention

[0006] The purpose of the present invention is to provide a bearing life limit load test bench, which has the advantages of compact structure and high test efficiency, so that the test results are more comprehensive and accurate.

[0007] In order to achieve the above-mentioned purpose, the main technical scheme adopted by the present invention includes: a bearing life limit load test bench, comprising a test bench and a mounting seat fixed to one side of the test bench, a dual-axis motor is fixedly mounted on the outer surface of the mounting seat, a clamping structure connected to the dual-axis motor is arranged on the side of the mounting seat close to the test bench, and a centrifugal lifting structure, an extrusion structure and a watering device are arranged on the outside of the mounting seat;

[0008] The centrifugal lifting structure includes a rotating shaft, a swing seat, a sliding sleeve, a rotating sleeve, a swing arm, a connecting rod and a sphere. An adjusting sleeve is arranged on the outer surface of the rotating shaft, a reset spring is installed between the adjusting sleeve and the sliding sleeve, the rotating sleeve bearing is installed on the top of the sliding sleeve, the sliding sleeve is sleeve-mounted on the outer surface of the rotating shaft, the swing seat is welded and installed on the top of the rotating shaft, one end of the swing arm is hinged to the swing seat, the sphere is welded and installed on the other end of the swing arm, and the connecting rod is hinged and installed between the rotating sleeve and the swing arm;

[0009] The extrusion structure includes a connecting rod and a pressing block, and a pressure sensing device is fixedly connected between the connecting rod and the pressing block;

[0010] The watering equipment is composed of a pump body, a valve body, a connecting pipe and a spray pipe;

[0011] A connecting structure is provided between the sliding sleeve, the connecting rod and the valve body, the connecting structure comprises a first connecting arm and a second connecting arm, the valve body comprises a valve seat, a valve and a connecting swing arm, the valve is rotatably mounted in the valve seat through two shafts, one of the shafts extends to the outside of the valve seat and is fixed to one end of the connecting swing arm, and the second connecting arm is hingedly mounted between the first connecting arm and the connecting swing arm;

[0012] A transmission structure is provided between the dual-axis motor and the rotating shaft, and the transmission structure comprises a transmission gear and a driven gear;

[0013] A synchronous structure is arranged between the dual-shaft motor and the pump body, and the synchronous structure comprises two sets of synchronous wheels and a synchronous belt.

[0014] Preferably, the clamping structure includes a mounting plate, two clamping blocks, a bidirectional screw and a sliding block. A sliding groove connected to the outside is opened inside the mounting plate. The bidirectional screw bearing is installed in the sliding groove, and its top end extends to the outside of the mounting plate. A knob fixed to the top end of the bidirectional screw is rotatably installed on the upper surface of the mounting plate. The side of the mounting plate close to the mounting seat is connected and fixed to an output shaft of the dual-axis motor, and the two clamping blocks are symmetrically distributed up and down.

[0015] Preferably, the slider is slidably installed in the slide groove, and there are two sliders. The two clamping blocks are respectively fixed to the outer surfaces of the two sliders, and the outer surfaces of the two clamping blocks are both sleeved and installed with protective pads.

[0016] Preferably, the transmission gear is fixedly mounted on the other output shaft of the dual-shaft motor, and the driven gear is fixedly mounted on the bottom end of the rotating shaft and meshes with the transmission gear.

[0017] Preferably, the number of the swing arms, connecting rods and spheres is two, the two swing arms and connecting rods are symmetrically arranged, the inside of the adjustment sleeve and the rotating shaft are provided with adjustment holes, and a positioning rod is inserted and installed in the adjustment hole.

[0018] Preferably, the first connecting arm is hingedly installed between the sliding sleeve and the connecting rod, a T-shaped limiting frame is fixedly installed on the upper surface of the mounting seat, and a limiting sleeve sleeved on the outer surface of the connecting rod is fixedly installed on the left end of the limiting frame.

[0019] Preferably, the pump body consists of a pump casing and two rotors. A pump chamber adapted to the two rotors is opened inside the pump casing. The two rotors are arranged in the pump chamber for cross-rotation. There are two connecting pipes, which are respectively connected to the pump body, both sides of the valve body and the nozzle.

[0020] Preferably, a limit plate is fixedly installed on one side of the mounting seat close to the centrifugal lifting structure, the pump casing bolts are installed on the upper surface of the limit plate, the two synchronous wheels are distributed up and down, and the top synchronous wheel is fixedly connected to one of the rotors, and the bottom synchronous wheel is fixedly installed on the output shaft of the dual-axis motor, and the synchronous belt drive is connected between the two synchronous wheels.

[0021] The present invention has at least the following beneficial effects:

[0022] 1. The bearing life limit load test bench can not only perform conventional rotation tests on bearings, but also simulate the load conditions in actual use through the design of centrifugal force and swing arms, making the test closer to the real working conditions. It adds the test function in a wet environment. Through the pump body, connecting pipe and nozzle system, it can test the wear resistance and waterproof performance of bearings in a wet or humid environment, making the test results more comprehensive and accurate.

[0023] 2. The design of the bidirectional screw and knob makes the clamping process more precise and faster, ensuring the stability of the bearing during the test. The use of dual-axis motors not only simplifies the structure of the test equipment, but also improves the test efficiency because the two output shafts can perform different functional operations at the same time.

[0024] 3. The bearing life limit load test bench has a synchronous structure design that enables the pump body to work in conjunction with the dual-axis motor drive, reducing the number of manual operations and improving the automation level of the test. By adjusting the valve through the second connecting arm and the connecting swing arm, the water delivery volume can be automatically adjusted according to test requirements, further improving the intelligence and flexibility of the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0026] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0027] Figure 2 It is a structural schematic diagram of the test bench of the present invention;

[0028] Figure 3 It is a structural schematic diagram of the clamping structure of the present invention;

[0029] Figure 4 It is a structural schematic diagram of the centrifugal lifting structure and the extrusion structure of the present invention;

[0030] Figure 5 It is a structural schematic diagram of the centrifugal lifting structure and the synchronous structure of the present invention;

[0031] Figure 6 It is a structural schematic diagram of the extrusion structure of the present invention;

[0032] Figure 7 It is a structural schematic diagram of the valve body of the present invention;

[0033] Figure 8 It is a schematic diagram of the structure of the pump body of the present invention.

[0034] In the figure, 1, test bench; 2, mounting seat; 3, clamping structure; 301, mounting plate; 302, clamping block; 303, knob; 304, bidirectional screw; 305, slider; 306, pad; 4, dual-axis motor; 5, centrifugal lifting structure; 501, rotating shaft; 502, swing seat; 503, sliding sleeve; 504, rotating sleeve; 505, swing arm; 506, connecting rod; 507, sphere; 508, adjusting sleeve; 509, reset spring; 510, adjusting hole; 6, extrusion structure; 61, connecting rod; 62, pressing block; 63. Pressure sensing device; 7. Connecting structure; 71. First connecting arm; 72. Second connecting arm; 8. Sprinkler equipment; 801. Pump body; 8011. Pump casing; 8012. Pump chamber; 8013. Rotor; 802. Valve body; 8021. Valve seat; 8022. Valve; 8023. Connecting swing arm; 803. Connecting pipe; 804. Nozzle; 9. Synchronous structure; 901. Synchronous wheel; 902. Synchronous belt; 10. Transmission gear; 11. Driven gear; 12. Limiting frame; 13. Limiting sleeve; 14. Limiting plate. DETAILED DESCRIPTION

[0035] The following will describe the implementation methods of the present application in detail with the help of accompanying drawings and examples, so that the implementation process of how the present application uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0036] like Figure 1 - Figure 3 As shown, the bearing life limit load test bench provided in this embodiment includes a test bench 1 and a mounting seat 2 fixed to one side of the test bench 1, a dual-axis motor 4 is fixedly mounted on the outer surface of the mounting seat 2, a clamping structure 3 connected to the dual-axis motor 4 is arranged on the side of the mounting seat 2 close to the test bench 1, the clamping structure 3 includes a mounting plate 301, two clamping blocks 302, a bidirectional screw 304 and a slider 305, a slide groove connected to the outside is provided inside the mounting plate 301, the bearing of the bidirectional screw 304 is installed in the slide groove, and its top end extends to the outside of the mounting plate 301, a knob 303 fixed to the top end of the bidirectional screw 304 is rotatably mounted on the upper surface of the mounting plate 301, and the side of the mounting plate 301 close to the mounting seat 2 is connected and fixed to an output shaft of the dual-axis motor 4. The threads of the bidirectional screw 304 are arranged oppositely.

[0037] like Figure 3 As shown, the slider 305 is slidably installed in the slide slot, and there are two sliders 305, two clamping blocks 302 are respectively fixed to the outer surfaces of the two sliders 305, and the outer surfaces of the two clamping blocks 302 are sleeved with pads 306. The two clamping blocks 302 are symmetrically distributed up and down, which improves the fit between the clamping blocks 302 and the inner ring of the bearing, so that the clamping blocks 302 can better clamp and fix the bearing. The design of the bidirectional screw 304 and the knob 303 makes the clamping process more accurate and fast, ensuring the stability of the bearing during the test process, and can clamp and fix bearings of different diameters, improving the applicability of the test. In addition, the use of the dual-axis motor 4 not only simplifies the structure of the test equipment, but also improves the test efficiency, because the two output shafts can perform different functional operations at the same time.

[0038] like Figure 1 , Figure 4 - Figure 6 As shown, the outside of the mounting seat 2 is provided with a centrifugal lifting structure 5, an extrusion structure 6, and a sprinkler device 8; the centrifugal lifting structure 5 includes a rotating shaft 501, a swing seat 502, a sliding sleeve 503, a rotating sleeve 504, a swing arm 505, a connecting rod 506 and a sphere 507, an adjusting sleeve 508 is provided on the outer surface of the rotating shaft 501, and a reset spring 509 is installed between the adjusting sleeve 508 and the sliding sleeve 503; a transmission structure is provided between the dual-axis motor 4 and the rotating shaft 501, and the transmission structure includes a transmission gear 10 and a driven gear 11; the transmission gear 10 is fixedly installed on the other output shaft of the dual-axis motor 4, and the driven gear 11 is fixedly installed on the bottom end of the rotating shaft 501 and meshes with the transmission gear 10.

[0039] like Figure 5 and Figure 6 As shown, the bearing of the rotating sleeve 504 is installed on the top of the sliding sleeve 503, the sliding sleeve 503 is sleeved and installed on the outer surface of the rotating shaft 501, the swing seat 502 is welded and installed on the top of the rotating shaft 501, one end of the swing arm 505 is hinged to the swing seat 502, the ball 507 is welded and installed on the other end of the swing arm 505, and the connecting rod 506 is hinged and installed between the rotating sleeve 504 and the swing arm 505.

[0040] Specifically, there are two swing arms 505, two connecting rods 506 and two spheres 507, and the two swing arms 505 and the connecting rods 506 are symmetrically arranged. The adjusting sleeve 508 and the rotating shaft 501 are provided with adjusting holes 510, and a positioning rod is inserted and installed in the adjusting holes 510. There are multiple adjusting holes 510 on the rotating shaft 501. By moving the adjusting sleeve 508 and coordinating the insertion and cooperation of the positioning rod and the adjusting hole 510, the elastic force of the reset spring 509 can be adjusted, so that the centrifugal lifting structure 5 can be driven better.

[0041] like Figure 6 - Figure 8 As shown, the extrusion structure 6 includes a connecting rod 61 and a pressing block 62, and a pressure sensing device 63 is fixedly connected between the connecting rod 61 and the pressing block 62; the watering device 8 is composed of a pump body 801, a valve body 802, a connecting pipe 803 and a nozzle 804. The pump body 801 is composed of a pump housing 8011 and two rotors 8013. A pump cavity 8012 adapted to the two rotors 8013 is provided inside the pump housing 8011. The two rotors 8013 are cross-rotated and arranged in the pump cavity 8012. There are two connecting pipes 803, which are respectively connected to the pump body 801, both sides of the valve body 802 and the nozzle 804.

[0042] In order to improve the test efficiency, in this embodiment, a connecting structure 7 is provided between the sliding sleeve 503, the connecting rod 61 and the valve body 802, and the connecting structure 7 includes a first connecting arm 71 and a second connecting arm 72; the first connecting arm 71 is hingedly installed between the sliding sleeve 503 and the connecting rod 61, and a T-shaped limiting frame 12 is fixedly installed on the upper surface of the mounting seat 2, and a limiting sleeve 13 sleeved on the outer surface of the connecting rod 61 is fixedly installed on the left end of the limiting frame 12. Among them, a synchronous structure 9 is provided between the dual-axis motor 4 and the pump body 801, and the synchronous structure 9 includes two sets of synchronous wheels 901 and a synchronous belt 902. The two synchronous wheels 901 are distributed up and down, and the top synchronous wheel 901 is connected and fixed to one of the rotors 8013, and the bottom synchronous wheel 901 is fixedly installed on the output shaft of the dual-axis motor 4, and the synchronous belt 902 is transmission-connected between the two synchronous wheels 901.

[0043] When in use, this embodiment can not only perform conventional rotation tests on the bearings, but also simulate the load conditions in actual use through the design of centrifugal force and swing arm 505, so that the test is closer to the real working conditions and adds the test function in a wet environment. Through the pump body 801, connecting pipe 803 and nozzle 804 system, the wear resistance and waterproof performance of the bearings in a wet or humid environment can be tested, making the test results more comprehensive and accurate.

[0044] In this embodiment, if Figure 7 As shown, the valve body 802 is composed of a valve seat 8021, a valve 8022 and a connecting swing arm 8023. The valve 8022 is rotatably installed in the valve seat 8021 through two shafts, and one of the shafts extends to the outside of the valve seat 8021 and is fixed to one end of the connecting swing arm 8023. The second connecting arm 72 is hingedly installed between the first connecting arm 71 and the connecting swing arm 8023. The design of the synchronous structure 9 enables the operation of the pump body 801 and the drive of the dual-axis motor 4 to be linked, reducing the steps of manual operation and improving the automation level of the test. Through the adjustment of the valve 8022 by the second connecting arm 72 and the connecting swing arm 8023, the function of automatically adjusting the water delivery amount according to the test requirements is realized, further improving the intelligence and flexibility of the test.

[0045] A limit plate 14 is fixedly mounted on one side of the mounting seat 2 close to the centrifugal lifting structure 5, and the bearing of the rotating shaft 501 is mounted in the limit plate 14 to ensure stable driving of the rotating shaft 501. The pump housing 8011 is bolted to the upper surface of the limit plate 14.

[0046] It should be noted that when the valve 8022 is not adjusted, a certain gap is left between the valve 8022 and the valve seat 8021, so that the pump body 801 can carry out water delivery. The nozzle 804 is detachably mounted on a side of the mounting seat 2 close to the clamping structure 3 through a clamp.

[0047] In summary, the dual-axis motor 4 drives the centrifugal lifting structure 5 and the sprinkler 8, and the centrifugal lifting structure 5 cooperates with the connecting structure 7 to move the extrusion structure 6, which has the following advantages: Simulation of real working conditions: Through the design of centrifugal force and swing arm 505, this method can simulate the load conditions in actual use, making the test closer to the real working conditions. This helps to more accurately evaluate the performance and durability of bearings in actual applications. Comprehensive testing capabilities: This method is not limited to conventional rotation tests, but also adds testing functions in wet environments. Through the pump body 801, connecting pipe 803 and nozzle 804 system, the wear resistance and waterproof performance of the bearing in a wet or humid environment can be tested, thereby providing more comprehensive test results. Improved test accuracy: Since this method can simulate actual loads and wet environments, the test results are more accurate and reliable. This helps to reduce errors and uncertainties caused by the inconsistency between test conditions and actual applications. Enhanced adaptability: This method is suitable for bearing tests of various types and specifications, and has high adaptability. Whether it is a small precision bearing or a large heavy-load bearing, it can be tested and evaluated by this method.

[0048] like Figure 1 - Figure 8 As shown, the principle of the bearing life limit load test bench provided in this embodiment is as follows:

[0049] When the present invention is used, the shaft to be tested is fixed in the test bench 1, and the two-way screw 304 is driven to rotate by the knob 303, so that the two clamping blocks 302 move relatively and abut against the inner ring of the bearing, and the double-axis motor 4 is started to test the bearing. The other output shaft of the double-axis motor 4 cooperates with the transmission cooperation of the transmission gear 10 and the driven gear 11 to drive the rotating shaft 501 to rotate, and the rotation of the rotating shaft 501 drives the ball 507. When the ball 507 rotates at a high speed, centrifugal force is generated to drive the swing arm 505 to expand outward, thereby pulling the sliding sleeve 503 upward, and the upward movement of the sliding sleeve 503 drives one end of the first connecting arm 71 upward. At this time, the other end of the first connecting arm 71 moves downward to make the pressure block 62 press the bearing, simulating the load during actual use;

[0050] When the dual-axis motor 4 drives the clamping structure 3, the synchronous structure 9 drives the pump body 801 to work, and the rotor pump principle is used to pump water and transport it through the connecting pipe 803, and finally sprayed out by the nozzle 804, so as to test the wear resistance and waterproof performance of the bearing in a wet environment, so that the test results are more comprehensive and accurate;

[0051] In addition, when the first connecting arm 71 swings, the valve 8022 is adjusted through the second connecting arm 72 and the connecting swing arm 8023, so that water can be delivered according to demand, further improving the test effect.

[0052] For example, certain words are used in the specification and claims to refer to specific components. Those skilled in the art should understand that hardware manufacturers may use different terms to refer to the same component. This specification and claims do not use differences in names as a way to distinguish components, but use differences in the functions of components as the criteria for distinction. For example, "including" mentioned throughout the specification and claims is an open term, so it should be interpreted as "including but not limited to". "Approximately" means that within an acceptable error range, those skilled in the art can solve technical problems within a certain error range and basically achieve technical effects.

[0053] It should be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a product or system including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such product or system. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the product or system including the elements.

[0054] The above description shows and describes several preferred embodiments of the present invention, but as mentioned above, it should be understood that the present invention is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the invention concept described herein through the above teachings or the technology or knowledge of the relevant field. Changes and variations made by those skilled in the art do not depart from the spirit and scope of the present invention, and should be within the scope of protection of the claims attached to the present invention.

Claims

1. A bearing life limit load test bench, comprising a test bench (1) and a mounting seat (2) fixed to one side of the test bench (1), characterized in that: A dual-axis motor (4) is fixedly mounted on the outer surface of the mounting seat (2); a clamping structure (3) connected to the dual-axis motor (4) is provided on the side of the mounting seat (2) close to the test bench (1); and a centrifugal lifting structure (5), a squeezing structure (6) and a watering device (8) are provided on the outside of the mounting seat (2); The centrifugal lifting structure (5) comprises a rotating shaft (501), a swing seat (502), a sliding sleeve (503), a rotating sleeve (504), a swing arm (505), a connecting rod (506) and a sphere (507); an adjusting sleeve (508) is arranged on the outer surface of the rotating shaft (501); a reset spring (509) is installed between the adjusting sleeve (508) and the sliding sleeve (503); a bearing of the rotating sleeve (504) is installed on the top of the sliding sleeve (503); the sliding sleeve (503) is sleeve-mounted on the outer surface of the rotating shaft (501); the swing seat (502) is welded and installed on the top of the rotating shaft (501); one end of the swing arm (505) is hinged to the swing seat (502); the sphere (507) is welded and installed on the other end of the swing arm (505); and the connecting rod (506) is hinged and installed between the rotating sleeve (504) and the swing arm (505); The extrusion structure (6) comprises a connecting rod (61) and a pressing block (62), and a pressure sensing device (63) is fixedly connected between the connecting rod (61) and the pressing block (62); The watering device (8) is composed of a pump body (801), a valve body (802), a connecting pipe (803) and a spray pipe (804); A connecting structure (7) is provided between the sliding sleeve (503), the connecting rod (61) and the valve body (802), the connecting structure (7) comprising a first connecting arm (71) and a second connecting arm (72), the valve body (802) comprising a valve seat (8021), a valve (8022) and a connecting swing arm (8023), the valve (8022) being rotatably mounted in the valve seat (8021) via two shafts, one of the shafts extending to the outside of the valve seat (8021) and being fixed to one end of the connecting swing arm (8023), the second connecting arm (72) being hingedly mounted between the first connecting arm (71) and the connecting swing arm (8023); A transmission structure is provided between the dual-axis motor (4) and the rotating shaft (501), the transmission structure comprising a transmission gear (10) and a driven gear (11); A synchronous structure (9) is provided between the dual-axis motor (4) and the pump body (801), and the synchronous structure (9) comprises two sets of synchronous wheels (901) and a synchronous belt (902); The clamping structure (3) comprises a mounting plate (301), two clamping blocks (302), a bidirectional screw (304) and a sliding block (305); a sliding groove communicating with the outside is provided inside the mounting plate (301); a bearing of the bidirectional screw (304) is installed in the sliding groove, and its top end extends to the outside of the mounting plate (301); a knob (303) fixed to the top end of the bidirectional screw (304) is rotatably installed on the upper surface of the mounting plate (301); and a side of the mounting plate (301) close to the mounting seat (2) is connected and fixed to an output shaft of the dual-axis motor (4); The transmission gear (10) is fixedly mounted on the other output shaft of the dual-shaft motor (4), and the driven gear (11) is fixedly mounted on the bottom end of the rotating shaft (501) and meshes with the transmission gear (10); The first connecting arm (71) is hingedly mounted between the sliding sleeve (503) and the connecting rod (61); a T-shaped limiting frame (12) is fixedly mounted on the upper surface of the mounting seat (2); and a limiting sleeve (13) sleeved on the outer surface of the connecting rod (61) is fixedly mounted on the left end of the limiting frame (12).

2. A bearing life limit load test bench according to claim 1, characterized in that: The slider (305) is slidably installed in the slide groove, and there are two sliders (305). The two clamping blocks (302) are respectively fixed to the outer surfaces of the two sliders (305). The outer surfaces of the two clamping blocks (302) are both sleeved and installed with protective pads (306). The two clamping blocks (302) are symmetrically distributed up and down.

3. A bearing life limit load test bench according to claim 1, characterized in that: The number of the swing arms (505), the connecting rod (506) and the sphere (507) is two, and the two swing arms (505) and the connecting rod (506) are symmetrically arranged. The adjusting sleeve (508) and the rotating shaft (501) are both provided with adjusting holes (510) inside, and a positioning rod is inserted and installed in the adjusting hole (510).

4. A bearing life limit load test bench according to claim 1, characterized in that: The pump body (801) is composed of a pump casing (8011) and two rotors (8013). A pump chamber (8012) adapted to the two rotors (8013) is provided inside the pump casing (8011). The two rotors (8013) are arranged in the pump chamber (8012) to rotate crosswise. There are two connecting pipes (803), which are respectively connected to the pump body (801), the two sides of the valve body (802) and the nozzle (804).

5. A bearing life limit load test bench according to claim 4, characterized in that: A limit plate (14) is fixedly mounted on one side of the mounting seat (2) close to the centrifugal lifting structure (5); the pump housing (8011) is bolted to the upper surface of the limit plate (14); the two synchronous wheels (901) are distributed up and down, and the top synchronous wheel (901) is connected and fixed to one of the rotors (8013); the bottom synchronous wheel (901) is fixedly mounted on the output shaft of the dual-axis motor (4); and the synchronous belt (902) is transmission-connected between the two synchronous wheels (901).

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