Ball screw bearing oil lubrication durability test equipment

Abstract

A ball screw bearing oil lubrication durability test device disclosed by the present invention comprises a tool table and two tool sleeves oppositely arranged on the tool table, the tool sleeves are provided with oil cavities, the oil cavities are filled with lubricating grease, and a ball screw bearing to be tested is movably arranged in the oil cavities. The tool table is provided with a driving part used for driving a screw part of the ball screw bearing to be tested to rotate and a loading part used for applying an axial load to a nut part of the ball screw bearing to be tested. The tool sleeve is provided with a sealing structure which is used for being in linkage cooperation with the driving piece and the loading piece so as to achieve dynamic sealing of the oil cavity when the ball screw bearing to be tested operates. The problem that a traditional ball screw bearing test tool is difficult to test the bearing on the premise of simulating the actual operation condition, the actual oil bath lubrication environment condition and the loading condition of the bearing, and consequently the test precision and the test efficiency are low is solved.

Description

Technical Field

[0001] The invention relates to the technical field of bearing test fixtures, in particular to a ball screw bearing oil lubrication durability performance test device. Background Art

[0002] Ball screw bearings, as precision transmission components, are widely used in high-end equipment such as CNC machine tools and aerospace. Their oil lubrication durability directly impacts the overall operating accuracy and service life of the entire machine. Existing technologies often use single-station tooling to test bearing durability. This equipment simulates rotational motion through a simple drive mechanism and utilizes an external lubrication system to deliver grease. However, this type of equipment generally suffers from a single structural function: it can only test performance under a single operating condition or requires lubrication to be delivered through external piping, making it difficult to replicate the closed oil bath environment in which the bearing actually operates.

[0003] Traditional test fixtures have significant flaws when simulating complex operating conditions. First, the drive system and loading mechanism lack coordination, making it impossible to accurately simulate the coupling effects of axial load and speed that bearings experience during actual operation. Second, the immature dynamic sealing technology makes the oil chamber prone to grease leakage or pressure fluctuations, resulting in distorted simulation of the lubrication environment. Furthermore, the single-station design necessitates batch-by-batch comparison testing, resulting in long test cycles and poor data consistency, making it difficult to meet the requirements of efficient and high-precision testing. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the present invention provides a ball screw bearing oil lubrication durability performance test equipment to solve the problem that traditional ball screw bearing test tooling is difficult to test bearings under the premise of simulating the actual operating conditions of the bearings, the actual oil bath lubrication environment conditions and loading conditions, resulting in low test accuracy and test efficiency.

[0005] To achieve the above-mentioned purpose, the present invention provides a ball screw bearing oil lubrication durability performance test device, comprising a tooling table and two tooling sleeves relatively arranged on the tooling table, the tooling sleeves are provided with an oil chamber and the oil chamber is filled with lubricating grease, a ball screw bearing to be tested is movably arranged in the oil chamber, the tooling table is provided with a driving member for driving the screw portion of the ball screw bearing to be tested to rotate and a loading member for applying an axial load to the nut portion of the ball screw bearing to be tested, the tooling sleeve is provided with a sealing structure for cooperating with the driving member and the loading member to realize dynamic sealing of the oil chamber when the ball screw bearing to be tested is running.

[0006] The benefits of adopting the above technical solution are: in the above technology, two tooling sleeves and oil chamber structures are arranged side by side to achieve synchronous operation and durability performance testing of two sets of bearings to be tested in a closed oil bath environment, meeting the needs of high feasibility comparative tests; and by adjusting the relative positions (phase difference) of the two tooling sleeves, the fatigue resistance of the bearing steel balls or raceways when subjected to the same load in different installation positions can be compared, thereby expanding the test range; and the linkage between the driving part and the loading part accurately simulates the coupling effect of the speed and axial load in the actual operating conditions of the bearing, and then the dynamic sealing of the oil chamber is achieved through the sealing structure to reproduce the actual oil bath lubrication environment, effectively solving the problems of low testing efficiency, environmental simulation distortion and difficulty in simulating the actual operating conditions of ball screw bearings of traditional single-station equipment, and significantly improving the test accuracy and data comparison reliability.

[0007] The present invention further provides that: the driving part includes two groups of driving motors, the two groups of driving motors are arranged in a one-to-one correspondence with the positions of the two tooling sleeves, the output ends of the driving motors are coaxial and linked with a driving shaft, and the driving shaft is coaxially matched with the screw part of the ball screw bearing to be tested.

[0008] The benefits of adopting the above technical solution are: in the above technology, the two sets of drive motors and tooling sleeves are set in a one-to-one correspondence, realizing independent drive and speed control of the two sets of bearings, and simulating the durability performance differences under different speed conditions; and the coaxial coordination of the drive shaft and the screw part ensures the torque transmission efficiency, avoids the additional bending moment caused by eccentric transmission, and ensures the stability of the rotational motion of the screw part, providing a power basis for accurately simulating actual operating conditions.

[0009] The present invention further provides: the end of the drive shaft is provided with a slot for the end of the screw rod part of the bearing to be tested to be inserted, the end of the screw rod part of the bearing to be tested is provided with a card slot, the slot is connected with a card plate, the card plate and the card slot are clamped together, the oil chamber is connected to the starting end of the tooling sleeve and forms a first through hole for the end of the drive shaft to pass through the oil chamber, the starting end of the tooling sleeve is detachably connected to a first sealing cover for closing the first through hole, the first sealing cover is provided with a first through hole for the end of the drive shaft to pass through, the first sealing cover is detachably connected to the starting end of the tooling sleeve with a mounting sleeve, the screw rod part of the ball screw bearing to be tested is detachably connected with a first clamping ring, the first clamping ring is sleeved on the outer peripheral wall of the starting end of the screw rod part of the ball screw bearing to be tested and is tightly fitted with the outer peripheral wall of the screw rod part, and a test bearing is connected between the outer peripheral wall of the first clamping ring and the inner peripheral wall of the mounting sleeve.

[0010] The benefits of adopting the above technical solution are: in the above technology, the drive shaft is rigidly connected to the screw part through the card-matching structure of the slot and the clamping plate, ensuring efficient torque transmission and convenient loading and unloading; and the detachable design of the first sealing cover and the mounting sleeve simplifies the bearing disassembly and assembly process, among which the test bearing is tightened with the first clamping ring, which not only improves the rotation stability of the screw part, but also limits the follow-up tendency of the tooling sleeve, while sharing the radial load, ensuring the structural stability and data accuracy of the test process.

[0011] The present invention further provides that: a first sealing groove is circumferentially opened on the inner peripheral wall of the first through hole, the sealing structure includes a rotating sealing ring arranged in the first sealing groove, and the inner peripheral wall of the rotating sealing ring is sealingly matched with the outer peripheral wall of the drive shaft.

[0012] The benefits of adopting the above technical solution are: the rotating sealing ring in the first sealing groove in the above technology forms a dynamic seal with the outer peripheral wall of the drive shaft, which can still effectively prevent grease from overflowing from the oil chamber when the drive shaft rotates at high speed, maintain the stability of the oil chamber pressure, avoid test errors caused by seal failure in the lubrication environment, ensure the accuracy of oil bath working condition simulation, and provide a reliable environmental basis for bearing durability performance evaluation.

[0013] The present invention further provides that: a torque detection mechanism is connected between the starting end of the drive shaft and the output end of the drive motor for detecting the torque value applied to the drive shaft by the rotation of the screw rod.

[0014] The benefits of adopting the above technical solution are: the torque detection mechanism in the above technology monitors the torque value transmitted by the drive shaft in real time, and can accurately capture the friction torque change characteristics caused by wear and lubrication status changes during the operation of the bearing, provide data support for the quantitative evaluation of durability performance, make up for the lack of real-time parameter monitoring in traditional equipment, and improve the scientific nature and analyzability of test data; the torque detection mechanism in the above technology can adopt a torque sensor or torque detection instrument, etc. Since the torque detection mechanism is an existing technology, its structure and function will not be described in detail, and its linkage method and connection structure with the drive shaft will not be described in detail.

[0015] The present invention is further provided with: the loading part includes two groups of loading cylinders, and the two groups of loading cylinders are arranged in a one-to-one correspondence with the positions of the two tooling sleeves. The output end of the loading cylinder is coaxially connected with a loading shaft, the starting end of the loading shaft passes through the tooling sleeve into the oil chamber and the starting end of the loading shaft is detachably connected to a second clamping ring, the second clamping ring is provided with a second through-hole for the end of the screw part of the ball screw bearing to be tested to pass through, the end of the second clamping ring is detachably connected to a third clamping ring, the third clamping ring is provided with a third through-hole for accommodating the nut part of the ball screw bearing to be tested, the inner circumferential wall of the third through-hole is formed with two first limit surfaces by a cutting process, and the outer circumferential wall of the nut part is formed with two second limit surfaces by a cutting process, the two first limit surfaces correspond to the two second limit surfaces one-to-one and are arranged in abutment with each other.

[0016] The benefits of adopting the above technical solution are: in the above technology, the loading cylinder realizes the precise transmission of the loading load to the nut part through the detachable connection structure of the loading shaft, the second clamping ring and the third clamping ring, that is, the rotational freedom of the nut part is limited by the abutment cooperation of the first limit surface and the second limit surface, ensuring that the nut part only slides axially when the screw part rotates, so that the loading load acts completely on the axial direction of the bearing, thereby accurately simulating the actual stress state and avoiding the interference of the additional torque on the test results.

[0017] The present invention further provides: the oil chamber is connected to the end portion of the tooling sleeve and forms a second through hole for the loading shaft to pass through; the end portion of the tooling sleeve is detachably connected to a second sealing cover for closing the second through hole; the second sealing cover is provided with a fourth through hole for the loading shaft to pass through.

[0018] The benefits of adopting the above technical solution are: in the above technology, the second sealing cover achieves the end sealing of the oil chamber by closing the second through hole, and the fourth through hole opened therein provides an axial movement channel for the loading shaft. The detachable design facilitates the installation, commissioning, maintenance and replacement of the bearing to be tested, shortens the equipment auxiliary operation time, and improves the test efficiency; at the same time, the rigid connection between the sealing cover and the tooling sleeve enhances the stability of the oil chamber structure, avoiding the vibration generated during the loading process affecting the sealing performance.

[0019] The present invention further provides that: a second sealing groove is circumferentially formed on the inner peripheral wall of the fourth through hole, and the sealing structure further includes a piston sealing ring circumferentially arranged in the second sealing groove.

[0020] The benefits of adopting the above technical solution are: in the above technology, the piston sealing ring in the second sealing groove produces elastic deformation with the axial movement of the loading shaft, which can not only adapt to the reciprocating sliding of the loading shaft, but also continuously maintain the sealing contact pressure, effectively blocking the leakage of grease through the fourth perforation; its dynamic sealing characteristics ensure that the oil chamber maintains stable pressure when the loading conditions change, further improving the accuracy of the oil bath environment simulation and ensuring the reliability of the test data.

[0021] The present invention further provides that: an oil filling hole for communicating with the oil cavity is opened on the tool sleeve, and a sealing plate for closing or exposing the oil filling hole is detachably connected to the outer peripheral wall of the tool sleeve.

[0022] The benefits of adopting the above technical solution are: the oil filling hole in the above technology provides a convenient channel for filling and replacing lubricating grease for the oil chamber, and the sealing plate realizes selective sealing of the oil filling hole through a detachable connection to ensure the sealing performance of the oil chamber; the amount and type of grease in the oil chamber can be flexibly adjusted through the oil filling hole to meet the needs of comparative tests under different lubrication conditions, thereby expanding the scope of application and test flexibility of the equipment.

[0023] The present invention further provides that: a rotation-stopping strip for limiting the rotation of the tooling sleeves is provided between the two tooling sleeves, and both ends of the rotation-stopping strip are detachably connected to the outer peripheral walls of the two tooling sleeves.

[0024] The benefits of adopting the above technical solution are: the above technical stop rotation pressure strip is rigidly connected to the two tooling sleeves, effectively limiting the rotation tendency of the tooling sleeve during the test process, improving the structural stability of the synchronous operation of the double workstations, avoiding load application deviation caused by deflection of the tooling sleeve, and ensuring the accuracy of the test data. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A three-dimensional view of the present invention; Figure 2 A three-dimensional view of the tooling sleeve and its linkage components in the present invention; Figure 3 for Figure 2 A side sectional view of Figure 4 for Figure 3 Partial enlarged view of part A in the middle; Figure 5 A three-dimensional view of the ball screw bearing to be tested in the present invention; Figure 6 This is a three-dimensional view of the nut portion and the third clamping ring of the ball screw bearing to be tested in the present invention in a separated state. DETAILED DESCRIPTION

[0026] The present invention provides a ball screw bearing oil lubrication durability performance test device, comprising a tooling table 1 and two tooling sleeves 11 relatively arranged on the tooling table 1, the tooling sleeve 11 is provided with an oil chamber 111 and the oil chamber 111 is filled with lubricating grease, a ball screw bearing 12 to be tested is movably arranged in the oil chamber 111, the tooling table 1 is provided with a driving member for driving the screw portion 121 of the ball screw bearing 12 to be tested to rotate and a loading member for applying an axial load to the nut portion 123 of the ball screw bearing 12 to be tested, the tooling sleeve 11 is provided with a sealing structure for cooperating with the driving member and the loading member to realize dynamic sealing of the oil chamber 111 when the ball screw bearing 12 to be tested is running, and the driving member includes two sets of driving motors 2. The two groups of drive motors 2 are arranged in a one-to-one correspondence with the two tooling sleeves 11. The output end of the drive motor 2 is coaxial and linked with a drive shaft 21. The drive shaft 21 is coaxially matched with the screw portion 121 of the ball screw bearing 12 to be tested. The end of the drive shaft 21 is provided with a slot 211 for inserting the end of the screw portion 121 of the bearing to be tested. The end of the screw portion 121 of the bearing to be tested is provided with a card slot 122. A card plate 212 is connected to the slot 211. The card plate 212 is card-matched with the card slot 122. The oil chamber 111 is connected to the starting end of the tooling sleeve 11 and is formed with a first through hole 112 for the end of the drive shaft 21 to penetrate the oil chamber 111. The starting end of the tooling sleeve 11 is detachably connected with a card slot for sealing A first sealing cover 13 is provided to close the first through hole 112. A first through hole 131 is provided on the first sealing cover 13 for the end of the drive shaft 21 to pass through. A mounting sleeve 14 is detachably connected between the first sealing cover 13 and the starting end of the tooling sleeve 11. A first clamping ring 141 is detachably connected to the screw rod portion 121 of the ball screw bearing 12 to be tested. The first clamping ring 141 is sleeved on the outer peripheral wall of the starting end of the screw rod portion 121 of the ball screw bearing 12 to be tested and is tightly fitted with the outer peripheral wall of the screw rod portion 121. A test bearing 142 is connected between the outer peripheral wall of the first clamping ring 141 and the inner peripheral wall of the mounting sleeve 14. A first sealing groove 132 is circumferentially provided on the inner peripheral wall of the first through hole 131. The sealing structure includes a first sealing groove. The rotating sealing ring 133 in 132, the inner circumferential wall of the rotating sealing ring 133 is sealed and matched with the outer circumferential wall of the driving shaft 21, and a torque detection mechanism 22 for detecting the torque value applied to the driving shaft 21 by the rotation of the screw rod part 121 is connected between the starting end of the driving shaft 21 and the output end of the driving motor 2. The loading component includes two groups of loading cylinders 3, and the two groups of loading cylinders 3 are arranged in a one-to-one correspondence with the positions of the two tooling sleeves 11. The output end of the loading cylinder 3 is coaxially connected to the loading shaft 31, and the starting end of the loading shaft 31 penetrates the tooling sleeve 11 into the oil chamber 111 and the starting end of the loading shaft 31 is detachably connected to a second clamping ring 32, and the second clamping ring 32 is provided with a second through-hole 321 for the end of the screw rod part 121 of the ball screw bearing 12 to be tested to penetrate.The end of the second clamping ring 32 is detachably connected to a third clamping ring 33, and the third clamping ring 33 is provided with a third through-hole 331 for accommodating the nut portion 123 of the ball screw bearing 12 to be tested. The inner peripheral wall of the third through-hole 331 is formed with two first limiting surfaces 332 by a cutting process, and the outer peripheral wall of the nut portion 123 is formed with two second limiting surfaces 333 by a cutting process. The two first limiting surfaces 332 correspond to the two second limiting surfaces 333 one by one and are abutted and matched. The oil chamber 111 is connected to the end portion of the tooling sleeve 11 and is formed with a second through-hole 113 for the loading shaft 31 to pass through. The end portion of the tooling sleeve 11 is detachably connected with a through-hole for closing the second through-hole The second sealing cover 15 of the hole 113 is provided with a fourth through-hole 151 for the loading shaft 31 to pass through. A second sealing groove 152 is circumferentially provided on the inner circumferential wall of the fourth through-hole 151. The sealing structure also includes a piston sealing ring 153 circumferentially arranged in the second sealing groove 152. The tooling sleeve 11 is provided with an oil filling hole 16 for communicating with the oil chamber 111. A sealing plate 161 for closing or exposing the oil filling hole 16 is detachably connected to the outer circumferential wall of the tooling sleeve 11. A rotation-stopping strip 17 for limiting the rotation of the tooling sleeves 11 is provided between the two tooling sleeves 11. The two ends of the rotation-stopping strip 17 are detachably connected to the outer circumferential walls of the two tooling sleeves 11.

[0027] Specific operation process: 1. Installation process of the ball screw bearing to be tested: 1. Double-station synchronous / independent installation (taking synchronous installation as an example): remove the first sealing cover, installation sleeve and second sealing cover of the two tooling sleeves, clean the impurities inside the oil chamber, and ensure that the inner wall of the oil chamber is free of oil stains and iron filings; insert one end of the screw rod of the ball screw bearing to be tested into the slot of the drive shaft, so that the slot of the screw rod and the card in the slot are accurately matched (to ensure coaxiality); set a first clamping ring on the outer peripheral wall of the starting end of the screw rod, and make the first clamping ring and the screw rod fit tightly through the expansion process, and then set the test bearing between the outer peripheral wall of the first clamping ring and the inner peripheral wall of the installation sleeve to ensure that the test bearing rotates smoothly; put the nut part of the bearing to be tested into the third through-hole of the third clamping ring, so that the two first limit surfaces of the inner peripheral wall of the third through-hole abut against the second fiber cotton of the outer peripheral wall of the nut part; The clamping ring is detachably connected to the second clamping ring (such as fixed with bolts), and then the second clamping ring is connected to the starting end of the loading shaft to ensure that the loading shaft is coaxial with the screw rod; a rotating sealing ring is installed in the first sealing groove of the first sealing cover, the mounting sleeve is connected to the starting end of the tooling sleeve, and then the first sealing cover is installed (ensure that the end of the drive shaft passes through the first through-hole and the inner circumferential wall of the rotating sealing ring is tightly fitted with the outer circumferential wall of the drive shaft); a piston sealing ring is installed in the second sealing groove of the second sealing cover, and the second sealing cover is connected to the end of the tooling sleeve (ensure that the loading shaft passes through the fourth through-hole and the piston sealing ring is sealed with the outer circumferential wall of the loading shaft); the two ends of the anti-rotation strip are detachably connected to the outer circumferential walls of the two tooling sleeves (such as tightened with bolts) to limit the tooling sleeve from rotating with the screw rod during the test.

[0028] 2. Verification of oil filling and sealing of the oil chamber: remove the sealing plates on the outer wall of the two tooling sleeves to expose the oil filling hole; inject the preset type of lubricating grease into the oil chamber through the oil filling hole, and observe the oil chamber liquid level during the oil filling process (which can be monitored through the observation window reserved in the tooling sleeve or the oil level sensor) to ensure that the lubricating grease completely fills the oil chamber and there are no bubbles; after the oil filling is completed, reinstall the sealing plate and tighten it to prevent grease leakage; start the loading cylinder, apply the rated preload to the nut part of the two stations respectively, and observe whether there is grease leakage at the first sealing cover, the second sealing cover, and the oil filling hole sealing plate. If leakage occurs, stop the machine to adjust the installation position of the sealing ring or replace the sealing ring until there is no leakage. 2. Test process for the ball screw bearing to be tested: After confirming that all parameters (speed, load, duration, and detection interval) are correct in the external industrial control equipment, start the test: the drive motor maintains the rated speed, the loading cylinder continuously applies the rated axial load, the torque detection mechanism records the torque value of each station at the set interval, and the loading system provides real-time feedback on load changes (if the load is lower than the set value, it will automatically reload). The operator monitors the following data in real time through the display screen of the industrial control equipment: the screw speed of the two stations, the axial load value, the torque change curve, the oil chamber sealing status (monitored by a camera or leakage sensor), and the operating temperature of the drive motor / loading cylinder.

[0029] Technical effects are reflected in the following aspects: the double-station tooling set 11 realizes synchronous testing of two sets of bearings. By adjusting the phase difference, the fatigue resistance of different installation positions can be compared, thereby improving the test efficiency and scope; the rotating seal ring 133 and the piston seal ring 153 form a dynamic sealing system to prevent grease leakage and maintain stable pressure in the oil chamber 111, accurately reproducing the actual oil bath working conditions; and the torque detection mechanism 22 monitors the torque changes in real time, and combines the linkage control of the driving part and the loading part to realize the simulation of the speed and load coupling effect, effectively solving the problems of distortion in working condition simulation and low test accuracy of traditional equipment.

[0030] The industrial control equipment described in the above technology is existing technology, which can be intelligent monitoring equipment such as an industrial computer. Since it is existing technology, its structure and function will not be described in detail.

[0031] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which shall fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A ball screw bearing oil lubrication durability test equipment, characterized by: It includes a tooling table and two tooling sleeves arranged relatively on the tooling table, the tooling sleeve is provided with an oil cavity and the oil cavity is filled with lubricating grease, a ball screw bearing to be tested is movably arranged in the oil cavity, the tooling table is provided with a driving member for driving the screw part of the ball screw bearing to be tested to rotate and a loading member for applying an axial load to the nut part of the ball screw bearing to be tested, and the tooling sleeve is provided with a sealing structure for cooperating with the driving member and the loading member to realize dynamic sealing of the oil cavity when the ball screw bearing to be tested is running.

2. The ball screw bearing oil lubrication durability performance test equipment according to claim 1, characterized in that: The driving component includes two groups of driving motors, and the two groups of driving motors are arranged in a one-to-one correspondence with the positions of the two tooling sleeves. The output ends of the driving motors are coaxial and linked with a driving shaft, and the driving shaft is coaxially matched with the screw part of the ball screw bearing to be tested.

3. The ball screw bearing oil lubrication durability performance test equipment according to claim 2, characterized in that: The end of the drive shaft is provided with a slot for inserting the end of the screw rod portion of the bearing to be tested, and the end of the screw rod portion of the bearing to be tested is provided with a card slot, and a card plate is connected to the slot, and the card plate and the card slot are clamped together. The oil chamber is connected to the starting end of the tooling sleeve and forms a first through hole for the end of the drive shaft to penetrate the oil chamber. The starting end of the tooling sleeve is detachably connected to a first sealing cover for closing the first through hole, and a first through hole for the end of the drive shaft to penetrate is provided on the first sealing cover, and a mounting sleeve is detachably connected between the first sealing cover and the starting end of the tooling sleeve, and a first clamping ring is detachably connected to the screw rod portion of the ball screw bearing to be tested, and the first clamping ring is sleeved on the outer peripheral wall of the starting end of the screw rod portion of the ball screw bearing to be tested and is tightly fitted with the outer peripheral wall of the screw rod portion, and a test bearing is connected between the outer peripheral wall of the first clamping ring and the inner peripheral wall of the mounting sleeve.

4. The ball screw bearing oil lubrication durability performance test equipment according to claim 3, characterized in that: A first sealing groove is circumferentially formed on the inner peripheral wall of the first through hole. The sealing structure includes a rotating sealing ring arranged in the first sealing groove. The inner peripheral wall of the rotating sealing ring is sealingly matched with the outer peripheral wall of the driving shaft.

5. The ball screw bearing oil lubrication durability performance test equipment according to claim 2, characterized in that: A torque detection mechanism is connected between the starting end of the drive shaft and the output end of the drive motor, and is used to detect the torque value applied to the drive shaft by the rotation of the screw rod.

6. The ball screw bearing oil lubrication durability performance test equipment according to claim 1, characterized in that: The loading part includes two groups of loading cylinders, and the two groups of loading cylinders are arranged in a one-to-one correspondence with the positions of the two tooling sleeves. The output end of the loading cylinder is coaxially connected to the loading shaft, the starting end of the loading shaft passes through the tooling sleeve into the oil chamber and the starting end of the loading shaft is detachably connected to a second clamping ring, the second clamping ring is provided with a second through-hole for the end of the screw part of the ball screw bearing to be tested to pass through, the end of the second clamping ring is detachably connected to a third clamping ring, the third clamping ring is provided with a third through-hole for accommodating the nut part of the ball screw bearing to be tested, the inner circumferential wall of the third through-hole is formed with two first limit surfaces by a cutting process, and the outer circumferential wall of the nut part is formed with two second limit surfaces by a cutting process, the two first limit surfaces correspond to the two second limit surfaces one-to-one and are arranged in abutment with each other.

7. The ball screw bearing oil lubrication durability test equipment according to claim 6, characterized in that: The oil chamber is connected to the end of the tooling sleeve and is formed with a second through hole for the loading shaft to pass through. The end of the tooling sleeve is detachably connected to a second sealing cover for closing the second through hole. The second sealing cover is provided with a fourth through hole for the loading shaft to pass through.

8. The ball screw bearing oil lubrication durability test equipment according to claim 7, characterized in that: A second sealing groove is circumferentially formed on the inner peripheral wall of the fourth through hole, and the sealing structure further includes a piston sealing ring circumferentially arranged in the second sealing groove.

9. The ball screw bearing oil lubrication durability test equipment according to claim 1, characterized in that: An oil filling hole for communicating with the oil cavity is provided on the tooling sleeve, and a sealing plate for closing or exposing the oil filling hole is detachably connected to the outer peripheral wall of the tooling sleeve.

10. The ball screw bearing oil lubrication durability test equipment according to claim 1, characterized in that: A rotation-stopping strip for limiting the rotation of the tooling sleeves is provided between the two tooling sleeves, and both ends of the rotation-stopping strip are detachably connected to the outer peripheral walls of the two tooling sleeves.

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