A multi-point testing device for bearing steel ball strength

Abstract

The invention discloses a multi-point testing device for the strength of a bearing steel ball, which relates to the technical field of strength testing. The device comprises a base, a hydraulic rod is fixedly installed above the base, the telescopic end of the hydraulic rod is fixedly connected to a connecting plate, and also comprises a dynamic pressurizing mechanism, the dynamic pressurizing mechanism comprises a motor fixedly installed inside the base, an inner bearing platform rotatably connected to the base is fixedly connected to the driving shaft of the motor, a pressure plate is provided below the connecting plate, and a positioning component for preventing the steel ball from moving, the positioning component comprises a positioning ring hooped around the outside of the steel ball, twelve positioning rings are arranged in a circular array around the center point of the inner bearing platform, and the steel ball in a pressurized state is driven to roll by the rotation of the inner bearing platform, so as to simulate the rolling state of the steel ball in the actual bearing operation process. Compared with the existing static pressurization for strength testing, the test result is closer to the actual usage situation, thereby more accurately evaluating the performance of the steel ball in the actual working environment.

Description

Technical Field

[0001] The invention relates to the technical field of strength testing, and in particular to a multi-point strength testing device for a bearing steel ball. Background Art

[0002] Bearing steel balls are key components in rolling bearings, mainly used to reduce friction and support loads during bearing operation. Bearing steel balls are made of bearing steel and have the characteristics of high hardness, high strength, good wear resistance and fatigue resistance, which can meet the use requirements of bearings under various complex working conditions.

[0003] In actual applications, bearing steel balls need to withstand a variety of complex forces, such as axial force, radial force and impact force. In order to ensure that the steel balls will not be deformed, cracked or damaged due to insufficient strength during normal use, the produced steel balls need to be strength tested.

[0004] Traditional bearing steel ball strength testing devices are mainly composed of hydraulic rods and positioning components. The hydraulic rod applies pressure to the steel ball, and the positioning component prevents the steel ball from shifting, thereby realizing the steel ball strength test. This test only realizes strength detection by applying pressure to a single point on the surface of the steel ball. For bearing steel balls, their actual working strength depends not only on static compressive strength, but also on multiple factors such as dynamic load-bearing capacity and fatigue resistance. Therefore, the existing bearing steel ball strength testing device has a single detection effect, lacks dynamic performance evaluation, and ignores friction and wear characteristics, which has certain limitations. Summary of the Invention

[0005] The purpose of the present invention is to propose a multi-point bearing steel ball strength testing device to solve the problems that the existing bearing steel ball strength testing device has a single detection effect, lacks dynamic performance evaluation, and ignores friction and wear characteristics.

[0006] To achieve the above objectives, the present invention adopts the following technology: a multi-point testing device for the strength of a bearing steel ball: comprising a base, a hydraulic rod fixedly mounted above the base, a connecting plate fixedly connected to the telescopic end of the hydraulic rod, and further comprising:

[0007] A dynamic pressurizing mechanism, comprising a motor fixedly mounted inside the base, a driving shaft of the motor having an inner bearing platform fixedly connected to the base for rotation, and a pressure plate provided below the connecting plate;

[0008] A positioning component for preventing the steel ball from moving, the positioning component comprising a positioning ring encircling the outside of the steel ball, wherein twelve positioning rings are arranged in a circular array around the center point of the inner bearing platform;

[0009] The motor drives the inner bearing platform to rotate, so that the steel ball clamped between the inner bearing platform and the pressure plate rolls at a fixed point under the hoop of the positioning ring.

[0010] As a further description of the above-mentioned technology, a multi-point testing device for the strength of a bearing steel ball is provided: a lower pressure ring is fixedly connected to the inner supporting platform, a mounting ring is rotatably connected to the bottom of the pressure plate, an upper pressure ring embedded in the mounting ring is fixed to the bottom of the mounting ring, and the lower pressure ring and the upper pressure ring are respectively located below and above the steel ball.

[0011] As a further description of the above-mentioned technology, a multi-point testing device for the strength of a bearing steel ball is provided: the positioning component also includes an outer supporting platform fixed on the base and located outside the inner supporting platform, and a limit frame is fixedly arranged in a ring shape on the top of the outer supporting platform, and a slider is slidably connected to the inside of the limit frame, and one side of the slider is fixedly connected to a fixed plate fixed to the positioning ring.

[0012] As a further description of the above-mentioned technology, a multi-point testing device for the strength of a bearing steel ball: it also includes an adjustment unit, which includes an inner embedded plate fixed to the bottom of the connecting plate and slidingly connected to the pressure plate, the interior of the pressure plate is slidingly connected to an inclined block, the bottom of the inclined block is fixedly connected to a pad, a support spring is provided inside the pressure plate, and the bottom of the inner embedded plate is fixedly connected to a positioning rod that passes through the pressure plate.

[0013] As a further description of the above-mentioned technology, a multi-point testing device for the strength of a bearing steel ball is provided: a tension spring is provided between the slider and the limit frame, and a trigger unit is provided inside the fixed plate.

[0014] As a further description of a multi-point testing device for the strength of a bearing steel ball according to the above technology: the trigger unit includes a shell fixed to a fixed plate, a slide seat is slidably connected to the inside of the shell, two tension springs are provided between the slide seat and the inner wall of the shell, a spring telescopic rod is fixedly connected to one side of the slide seat, a connecting rod is slidably connected to the inside of the fixed plate, the top end of the connecting rod is fixedly connected to a limiting block, a spring block is installed at the bottom end of the connecting rod, and a reset spring is provided between the connecting rod and the fixed plate.

[0015] As a further description of a multi-point testing device for the strength of a bearing steel ball according to the above technology: one side of the limit block is provided with stepped inclined serrations.

[0016] As a further description of the above technology, a multi-point testing device for the strength of a bearing steel ball is provided: spring top blocks are installed around the inner wall of the positioning ring, and steel balls are provided between the spring top blocks and the steel balls, between the mounting ring and the pressure plate, and between the inner bearing platform and the base.

[0017] As a further description of the above-mentioned technology, a multi-point testing device for the strength of a bearing steel ball is provided: it also includes a cleaning component, which includes an inner cylinder rotatably connected to the inner supporting platform, an impeller fixedly connected to the driving shaft of the motor, an outer cylinder fixedly connected to the outside of the inner cylinder, a filter cylinder placed inside the inner cylinder, and a top cover covering the top of the inner cylinder.

[0018] As a further description of a multi-point testing device for the strength of a bearing steel ball according to the above technology: the top and bottom of the outer cylinder are fixedly connected to a cover body, and the outside of the inner cylinder is fixedly connected to an isolation ring that is slidably connected to the top cover.

[0019] In summary, due to the use of the above-mentioned technology, the multi-point testing device for bearing steel ball strength has the following beneficial effects:

[0020] By rotating the inner bearing platform, the pressurized steel ball is driven to roll, simulating the rolling state of the steel ball during actual bearing operation. Compared with the existing static pressurization strength test, this design can make the test results closer to actual usage, thereby more accurately evaluating the performance of the steel ball in the actual working environment, thereby improving the test effect of the steel ball. In addition, the position where the steel ball is pressed changes continuously during the rolling process, and each point on its surface can withstand pressure in turn, thereby testing the reaction of the steel ball when squeezed at different positions. Compared with the static pressure test, the steel ball rotation pressure can more accurately reflect the stress distribution of the steel ball in a dynamic working environment, realize the test of dynamic load-bearing capacity, fatigue strength and other aspects, and enrich the test content;

[0021] During the rolling process, the steel ball will rub against the lower pressure ring and the upper pressure ring, which enables the friction coefficient of the steel ball to be tested under different pressures and rotation speeds. By testing the friction performance of the steel ball during the rotation and pressure process, we can better understand the lubrication characteristics and wear resistance of the steel ball material, and provide a basis for optimizing the bearing lubrication system and material selection;

[0022] By testing multiple steel balls of the same material simultaneously, the impact of uneven force or other accidental factors that may be experienced when testing a single steel ball can be reduced, making the test results more representative and reliable, and more accurately reflecting the overall performance of the batch of steel balls. In addition, if multiple steel balls of different materials are tested simultaneously, the performance of steel balls of different materials can be directly compared, and the advantages and disadvantages of various materials can be intuitively understood, so as to facilitate the selection of steel ball materials for different application scenarios.

[0023] The pad can be used to move the steel ball before each pressurization to achieve position switching of the steel ball, thereby changing the trajectory of the steel ball when rolling, more comprehensively detecting the performance of different positions on the steel ball surface, and simulating the multi-angle stress conditions of the steel ball under actual complex working conditions, more accurately evaluating the bearing capacity and fatigue resistance of the steel ball under various possible stress conditions, improving the test effect, and evenly distributing the wear on the steel ball surface to avoid excessive local wear of the steel ball affecting the test results. It is worth mentioning that the pad moves the steel ball at different angles before and after pressurization, resulting in differences in the rolling trajectory of the steel ball in each test, further ensuring the uniformity of the wear of the steel ball.

[0024] When pressurizing the steel ball, the pad can also play a buffering role, so that the hydraulic rod can be controlled to extend faster when pressurizing, without causing the steel ball to be damaged by impact, thus speeding up the strength test efficiency of the steel ball;

[0025] After each strength test of the steel ball, when the deformation or wear reaches a certain level, it will automatically pop out with the positioning component. This design can promptly identify the steel balls with problems after testing, speeding up the testing process. The steel balls that have not been ejected can be directly used for the next round of testing, shortening the test interval and thus improving the efficiency of steel ball testing.

[0026] The cleaning component can collect the debris generated during the test, avoiding debris contamination while preventing the debris from affecting the steel ball strength test, ensuring the accuracy of the test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 Shows an overall schematic diagram provided according to an embodiment of the present invention;

[0028] Figure 2 A schematic diagram of a pressing plate provided according to an embodiment of the present invention is shown;

[0029] Figure 3 A schematic diagram of an inner panel provided according to an embodiment of the present invention is shown;

[0030] Figure 4 The embodiment of the present invention provides Figure 3 Enlarged view of point A in the middle;

[0031] Figure 5 A schematic diagram of motor installation according to an embodiment of the present invention is shown;

[0032] Figure 6 A schematic diagram of an explosion of an outer cylinder according to an embodiment of the present invention is shown;

[0033] Figure 7 shows a schematic diagram of an airflow path provided according to an embodiment of the present invention;

[0034] Figure 8 A schematic diagram of a limit frame provided according to an embodiment of the present invention is shown;

[0035] Figure 9 A schematic diagram of a spring telescopic rod provided according to an embodiment of the present invention is shown;

[0036] Figure 10 The embodiment of the present invention provides Figure 9 Enlarged view of point B in the middle.

[0037] Legend:

[0038] 10. Base; 11. Hydraulic rod; 12. Connecting plate;

[0039] 20. Dynamic pressure mechanism; 21. Motor; 22. Inner bearing platform; 221. Lower pressure ring; 23. Pressure plate; 231. Mounting ring; 232. Upper pressure ring;

[0040] 30. Positioning component; 31. External bearing platform; 32. Limiting frame; 33. Slider; 34. Tension spring 1; 35. Fixing plate; 36. Positioning ring; 37. Spring top block; 38. Trigger unit; 381. Housing; 382. Slider; 383. Tension spring 2; 384. Spring telescopic rod; 385. Limiting block; 386. Connecting rod; 387. Return spring; 388. Spring clamp;

[0041] 40. Adjustment unit; 41. Inner plate; 42. Inclined block; 43. Support spring; 44. Backing plate; 45. Positioning rod;

[0042] 50. Cleaning assembly; 51. Inner cylinder; 52. Isolation ring; 53. Filter cylinder; 54. Outer cylinder; 55. Cover; 56. Top cover; 57. Impeller. DETAILED DESCRIPTION

[0043] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technology in the embodiments of the present invention, a multi-point strength testing device for bearing steel balls. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0044] like Figures 1-10 As shown, the present invention provides a bearing steel ball strength multi-point testing device: comprising a base 10, a hydraulic rod 11 fixedly mounted above the base 10, a connecting plate 12 fixedly connected to the telescopic end of the hydraulic rod 11, and further comprising:

[0045] The dynamic pressurizing mechanism 20 includes a motor 21 fixedly mounted inside the base 10. An inner bearing platform 22 rotatably connected to the base 10 is fixedly connected to the driving shaft of the motor 21. A pressure plate 23 is provided below the connecting plate 12. During the strength test, the steel ball is located between the inner bearing platform 22 and the pressure plate 23. The pressure test of the steel ball can be achieved by driving the pressure plate 23 by the hydraulic rod 11 to press the steel ball onto the inner bearing platform 22. The rotation of the pressure plate 23 driven by the motor 21 can cause the steel ball to roll during pressurization, switching the pressurization point of the steel ball and simulating the rolling operation state of the steel ball in the bearing.

[0046] A positioning member 30 for preventing the steel balls from moving includes a positioning ring 36 encircling the outside of the steel balls. Twelve positioning rings 36 are arranged in a circular array around the center point of the inner bearing platform 22. The purpose of setting twelve positioning rings 36 is to evenly distribute the steel balls between the inner bearing platform 22 and the pressure plate 23 when the number of steel balls is two, three, four, or six, thereby reducing uneven force on the pressure plate 23 during the pressurization process.

[0047] The motor 21 drives the inner bearing platform 22 to rotate, so that the steel ball clamped between the inner bearing platform 22 and the pressure plate 23 rolls at a fixed point under the hoop of the positioning ring 36 .

[0048] Reference Figure 2 、 Figure 4 and Figure 6 A lower pressure ring 221 is fixedly connected to the inner bearing platform 22, and a mounting ring 231 is rotatably connected to the bottom of the pressure plate 23. An upper pressure ring 232 embedded in the mounting ring 231 is fixed to the bottom of the mounting ring 231. The lower pressure ring 221 and the upper pressure ring 232 are respectively located below and above the steel ball. When the steel ball is pressurized for strength testing, the upper pressure ring 232 presses the steel ball onto the lower pressure ring 221. By replacing the lower pressure ring 221 and the upper pressure ring 232 with the same material as the inner and outer rings of the bearing, the operation and wear of the steel ball in actual use can be further simulated, thereby improving the accuracy of the test results.

[0049] Reference Figure 7 and Figure 8 The positioning component 30 also includes an outer bearing platform 31 fixed on the base 10 and located outside the inner bearing platform 22. The top of the outer bearing platform 31 is fixedly arranged with a limit frame 32 in a ring shape. The inner sliding connection of the limit frame 32 is connected with a slider 33. One side of the slider 33 is fixedly connected with a fixing plate 35 fixed to the positioning ring 36. By making the slider 33 slide inside the limit frame 32, the position of the positioning ring 36 can be changed through the fixing plate 35, which facilitates the transportation of the steel ball and prevents the operator from placing his hands between the inner bearing platform 22 and the pressure plate 23, thereby improving the safety of the device.

[0050] Reference Figure 8 and Figure 9and Figure 10 The cam 388 is fixed to the bottom of the support 35 and the cam 389 is fixed to the bottom of the support 35. When the cam 386 is in the state of being compressed, the spring 387 of the second tension spring 383 is used to pull the slide 382 in the direction of the cam, thereby making the cam 386 and the limit block 385 move upward under the elastic force of the return spring 387, driving the spring block 388 to disengage from the outer support platform 31, so that the fixing plate 35 and the outer support platform 31 are unlocked. At this time, the tension of the spring 34 drives the slider 33 and the fixing plate 35 to move. When the pressure on the steel ball is no longer applied, the fixing plate 35 drives the positioning ring 36 to automatically pull the steel ball that is worn or compressed to produce a concave deformation out from between the inner support platform 22 and the pressure plate 23, thereby speeding up the speed of identifying the quality of the steel ball and eliminating the need for manual labor to remove the steel ball from between the inner support platform 22 and the pressure plate 23. While improving safety, the remaining steel balls can continue to be tested again, thereby speeding up the test efficiency.

[0051] Reference Figure 10The spring clamping block 388 can be released from the outer support platform 31 as soon as the steel ball stops applying pressure, so that the spring clamping block 388 can be released from the outer support platform 31 and fixed by the slider 33 after the steel ball stops applying pressure. The plate 35 and the positioning ring 36 are brought out. When the steel ball is installed, the connecting rod 386 is manually pressed down to reset the slide seat 382 under the elastic force of the second tension spring 383. The purpose of providing a spring on the spring block 388 is to no longer need to align the spring block 388 with the slot on the outer bearing platform 31 before pressing the connecting rod 386 down. At this time, the spring on the spring block 388 is compressed. After the spring block 388 is aligned with the slot, the elastic force of the spring will automatically make the spring block 388 engage with the slot. This design improves the convenience of locking the fixed plate 35 by the spring block 388. The hardness of the spring inside the spring telescopic rod 384 is much greater than that of the second tension spring 383.

[0052] Reference Figure 3 and Figure 4 , also includes an adjusting unit 40, which includes an inner panel 41 fixed to the bottom of the connecting plate 12 and slidably connected to the pressure plate 23, an inclined block 42 slidingly connected inside the pressure plate 23, and a pad 44 fixedly connected to the bottom of the inclined block 42. A supporting spring 43 is provided inside the pressure plate 23, and a positioning rod 45 penetrating the pressure plate 23 is fixedly connected to the bottom of the inner panel 41. After the hydraulic rod 11 extends and drives the connecting plate 12, the inner panel 41 and the pressure plate 23 to move downward, the pad 44 at the bottom of the pressure plate 23 will contact the top of the steel ball, and the steel ball supports the pad 44 and the pressure plate 23. At this time, the inner panel 41 continues to move downward, causing relative sliding between the inner panel 41 and the pressure plate 23, and the inner panel 41 squeezes the inclined block 42 to drive the pad 44 to move. The steel ball is rotated under the action of the friction force between the two, thereby adjusting the angle of the steel ball. When the hydraulic rod 11 contracts, the connecting plate 12 drives the inner plate 41 to move upward, and the inner plate 41 lifts the pressure plate 23 upward through the positioning rod 45. At this time, the inclined block 42 and the pad 44 will move under the elastic force of the support spring 43, and the pad 44 cannot enter between the steel ball and the pressure plate 23 under the elastic force. When the inner plate 41 continues to move upward to move the pressure plate 23 upward and away from the steel ball, the pad 44 is reset under the elastic force of the support spring 43. Since the pressure between the pad 44 and the steel ball changes at this time, the friction between the two changes. The movement of the pad 44 drives the steel ball to rotate by a different amplitude than the amplitude of the steel wire rotation before the steel ball is pressurized, thereby changing the angle at which the steel ball is to be toggled.

[0053] Reference Figure 4 Figure 7 and Figure 8 Spring top blocks 37 are installed around the inner wall of the positioning ring 36. The upper and lower sets of spring top blocks 37 can further limit the position of the steel ball, so that the steel ball will not fall after being placed in the positioning ring 36, which is convenient for the placement of the steel ball before the test and the removal of the steel ball after the test. Steel balls are provided between the spring top blocks 37 and the steel ball, between the mounting ring 231 and the pressure plate 23, and between the inner bearing platform 22 and the base 10 to reduce the friction of the steel ball, the mounting ring 231 and the inner bearing platform 22 during the strength test of the steel ball.

[0054] Reference Figure 5 and Figure 6 , also includes a cleaning component 50, which includes an inner cylinder 51 rotatably connected to the inner bearing platform 22, an impeller 57 fixedly connected to the driving shaft of the motor 21, an outer cylinder 54 fixedly connected to the outside of the inner cylinder 51, and a filter cylinder 53 placed inside the inner cylinder 51, which filters debris through the bottom filter screen, and the top cover 56 of the inner cylinder 51 is closed. When the steel ball is pressed by the pressure plate 23, the positioning rod 45 will be embedded in the top cover 56, so that the top cover 56, the isolation ring 52 and the inner cylinder 51 are locked and will not rotate with the inner bearing platform 22 under the action of friction. The motor 21 drives the inner bearing platform 22 to rotate while driving the impeller 57 to rotate, and negative pressure is generated inside the inner cylinder 51. The outside air sucks the debris generated by friction during the steel ball strength test into the filter cylinder 53, so as to prevent the debris from interfering with the steel ball test.

[0055] The top and bottom of the outer cylinder 54 are fixedly connected with a cover body 55. When the steel ball is squeezed by the lower pressure ring 221 and the upper pressure ring 232, a negative pressure area is formed between the two cover bodies 55 and the inner supporting platform 22 and the pressure plate 23 respectively, so that debris is generated by friction between the steel ball and the lower pressure ring 221 and the upper pressure ring 232. The debris is directly sucked into the outer cylinder 54 together with the air under negative pressure, avoiding the debris from scattering and making it impossible to clean the debris through the cleaning component 50. The outside of the inner cylinder 51 is fixedly connected with an isolation ring 52 that is slidably connected to the top cover 56. The isolation ring 52 is used to block the airflow, avoiding the air sucked in from the air inlet at the top of the outer cylinder 54 directly entering the inner cylinder 51, resulting in a reduction in the suction force of the air inlet at the bottom of the outer cylinder 54, balancing the suction force at the top and bottom of the outer cylinder 54, and then improving the effect of absorbing debris.

[0056] Working principle: Manually press the connecting rod 386 to drive the limit block 385 to move downward, and then insert the steel ball between the two sets of spring top blocks 37 inside the positioning ring 36. At this time, the steel ball squeezes the spring telescopic rod 384 to drive the slide 382 to move above the limit block 385, limiting the limit block 385 and the connecting rod 386 to move upward, the tension spring 2 383 is stretched and the spring telescopic rod 384 is not compressed. Since the connecting rod 386 moves downward, the spring inside the spring block 388 is compressed, and the tension spring 1 34 and the fixed plate 35 are manually pushed to slide in the limit frame 32 to stretch the tension spring 1 34 until the spring block 388 is aligned with the slot on the outer bearing platform 31. The spring block 388 enters the slot under the spring force and locks the fixed plate 35. At this time, the steel ball is located between the lower pressure ring 221 and the upper pressure ring 232;

[0057] The hydraulic rod 11 is controlled to extend to drive the connecting plate 12, the inner panel 41 and the pressure plate 23 to move downward until the pad 44 contacts the top of the steel ball. At this time, the pad 44 and the pressure plate 23 are supported by the steel ball and cannot move downward. The inner panel 41 is further moved downward to squeeze the inclined block 42, so that the inclined block 42 drives the pad 44 to move outward, thereby causing the pad 44 to move the steel ball to rotate, thereby adjusting the angle of the steel ball. After the pad 44 moves out from above the steel ball, the upper pressure ring 232 contacts the top of the steel ball, and the hydraulic rod 11 is further controlled to extend to apply pressure to the steel ball.

[0058] The motor 21 is started to rotate the inner bearing platform 22 and the lower pressure ring 221, causing the steel ball to rotate during the pressurization process. At the same time, the motor 21 drives the impeller 57 to rotate, and the debris generated by the friction of the steel ball is sucked into the filter cartridge 53.

[0059] When the steel ball is worn or concavely deformed, the slide 382 pulls the slide 382 and the spring telescopic rod 384, so that the spring telescopic rod 384 continues to contact the steel ball. At this time, the slide 382 is no longer blocking, and the connecting rod 386 and the limit block 385 move upward under the elastic force of the return spring 387, driving the spring block 388 to move out of the slot. When the steel ball is no longer pressurized, the contraction force of the tension spring 34 drives the slider 33, the fixing plate 35, the positioning ring 36 and the steel ball to automatically move out from between the lower pressure ring 221 and the upper pressure ring 232.

[0060] The above is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited to this. Any technician familiar with this technical field, within the technical scope disclosed by the present invention, can make equivalent replacements or changes to a multi-point testing device for bearing steel ball strength and its inventive concept according to the technology of the present invention, which should be covered by the scope of protection of the present invention.

Claims

1. A multi-point testing device for the strength of a bearing steel ball, comprising a base (10), a hydraulic rod (11) fixedly mounted above the base (10), a connecting plate (12) fixedly connected to the telescopic end of the hydraulic rod (11), and characterized in that: Also includes: A dynamic pressurizing mechanism (20), the dynamic pressurizing mechanism (20) comprising a motor (21) fixedly mounted inside the base (10), an inner bearing platform (22) rotatably connected to the base (10) being fixedly connected to a drive shaft of the motor (21), and a pressure plate (23) being provided below the connecting plate (12); a positioning component (30) for preventing the steel ball from moving, the positioning component (30) comprising a positioning ring (36) encircling the outside of the steel ball, wherein twelve positioning rings (36) are arranged in a circular array around the center point of the inner bearing platform (22); The motor (21) drives the inner bearing platform (22) to rotate, so that the steel ball clamped between the inner bearing platform (22) and the pressure plate (23) rolls at a fixed point under the hoop of the positioning ring (36); The positioning component (30) further includes an outer bearing platform (31) fixed on the base (10) and located outside the inner bearing platform (22); a limit frame (32) is fixedly arranged in an annular shape on the top of the outer bearing platform (31); a slider (33) is slidably connected to the interior of the limit frame (32); and a fixing plate (35) fixed to the positioning ring (36) is fixedly connected to one side of the slider (33); The adjusting unit (40) further comprises an inner panel (41) fixed to the bottom of the connecting plate (12) and slidably connected to the pressing plate (23); an inclined block (42) is slidably connected to the interior of the pressing plate (23); a backing plate (44) is fixedly connected to the bottom of the inclined block (42); a supporting spring (43) is provided inside the pressing plate (23); and a positioning rod (45) is fixedly connected to the bottom of the inner panel (41) and passes through the pressing plate (23); A tension spring (34) is provided between the slider (33) and the limit frame (32), and a trigger unit (38) is provided inside the fixed plate (35); the trigger unit (38) includes a shell (381) fixed to the fixed plate (35), a slide seat (382) is slidably connected inside the shell (381), a tension spring (383) is provided between the slide seat (382) and the inner wall of the shell (381), a spring telescopic rod (384) is fixedly connected to one side of the slide seat (382), a connecting rod (386) is slidably connected to the inside of the fixed plate (35), the top end of the connecting rod (386) is fixedly connected to the limit block (385), one side of the limit block (385) is provided with a stepped inclined sawtooth, a spring block (388) is installed at the bottom end of the connecting rod (386), and a return spring (387) is provided between the connecting rod (386) and the fixed plate (35).

2. A bearing steel ball strength multi-point testing device according to claim 1, characterized in that: A lower pressure ring (221) is fixedly connected to the inner bearing platform (22), a mounting ring (231) is rotatably connected to the bottom of the pressure plate (23), an upper pressure ring (232) embedded in the mounting ring (231) is fixed to the bottom of the mounting ring (231), and the lower pressure ring (221) and the upper pressure ring (232) are respectively located below and above the steel ball.

3. The multi-point testing device for bearing steel ball strength according to claim 1, characterized in that: Spring top blocks (37) are installed around the inner wall of the positioning ring (36), and steel balls are provided between the spring top blocks (37) and the steel balls, between the mounting ring (231) and the pressure plate (23), and between the inner bearing platform (22) and the base (10).

4. A bearing steel ball strength multi-point testing device according to claim 1, characterized in that: The cleaning assembly (50) further comprises an inner cylinder (51) rotatably connected to the inner supporting platform (22), an impeller (57) fixedly connected to the driving shaft of the motor (21), an outer cylinder (54) fixedly connected to the outside of the inner cylinder (51), a filter cylinder (53) placed inside the inner cylinder (51), and a top cover (56) covering the top of the inner cylinder (51).

5. The multi-point testing device for bearing steel ball strength according to claim 4, characterized in that: The top and bottom of the outer cylinder (54) are both fixedly connected to a cover body (55), and the outside of the inner cylinder (51) is fixedly connected to an isolation ring (52) that is slidably connected to a top cover (56).

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