Bearing steel ball strength multi-point testing device

Abstract

The invention discloses a bearing steel ball strength multi-point testing device, and relates to the technical field of strength testing, the bearing steel ball strength multi-point testing device comprises a base, a hydraulic rod fixedly mounted above the base, a connecting plate fixedly connected to the telescopic end of the hydraulic rod, and a dynamic pressurizing mechanism comprising a motor fixedly mounted in the base, a driving shaft of the motor is fixedly connected with an inner bearing table rotationally connected with the base, a pressing plate and a positioning part used for preventing the steel balls from moving are arranged below the connecting plate, the positioning part comprises positioning rings hooped outside the steel balls, and the twelve positioning rings are arranged in a circumferential array around the center point of the inner bearing table; the inner bearing table rotates to drive the steel ball in the pressurized state to roll, the rolling state of the steel ball in the actual bearing operation process is simulated, and compared with an existing static pressurization strength test, the test result is closer to the actual use condition, so that the performance of the steel ball in the actual working environment is evaluated more accurately.

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] The traditional bearing steel ball strength testing device is mainly composed of a hydraulic rod and a positioning assembly. The hydraulic rod applies pressure to the steel ball, and the positioning assembly 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 the bearing steel ball, its actual working strength depends not only on the 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 the 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] In order to achieve the above-mentioned purpose, the present invention adopts the following technology: a bearing steel ball strength multi-point testing device: comprising a base, a hydraulic rod is fixedly installed on the top of the base, and a connecting plate is fixedly connected to the telescopic end of the hydraulic rod, and also includes: A dynamic pressurizing mechanism, the dynamic pressurizing mechanism comprising a motor fixedly mounted inside the base, an inner bearing platform rotatably connected to the base being fixedly connected to the driving shaft of the motor, and a pressure plate being arranged below the connecting plate; A positioning component for preventing the steel ball from moving, the positioning component comprising a positioning ring hooped on the outside of the steel ball, twelve of the positioning rings being arranged in a circular array around the center point of the inner bearing platform; The motor drives the inner bearing platform to rotate, so that the steel ball clamped between the inner bearing platform and the pressing plate rolls at a fixed point under the hoop of the positioning ring.

[0007] 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.

[0008] 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 bearing platform fixed on the base and located outside the inner bearing platform, a limit frame is fixedly arranged in a ring shape on the top of the outer bearing platform, 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.

[0009] As a further description of the above-mentioned technology, a multi-point testing device for the strength of a bearing steel ball also includes an adjusting unit, which includes an inner plate fixed to the bottom of the connecting plate and slidably connected to the pressure plate, the interior of the pressure plate is slidably connected with an inclined block, the bottom of the inclined block is fixedly connected with a pad, a support spring is provided inside the pressure plate, and the bottom of the inner plate is fixedly connected with a positioning rod that passes through the pressure plate.

[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 tension spring is provided between the slider and the limit frame, and a trigger unit is provided inside the fixed plate.

[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 trigger unit includes an outer shell fixed to a fixed plate, a sliding seat is slidably connected to the inside of the outer shell, two tension springs are provided between the sliding seat and the inner wall of the outer shell, a spring telescopic rod is fixedly connected to one side of the sliding 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.

[0012] 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.

[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: 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.

[0014] As a further description of the above-mentioned technology, a multi-point testing device for the strength of a bearing steel ball 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 on the top of the inner cylinder.

[0015] As a further description of a bearing steel ball strength multi-point testing device of 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.

[0016] In summary, due to the use of the above-mentioned technology, a bearing steel ball strength multi-point testing device has the following beneficial effects: The steel ball in the pressurized state is driven to roll by rotating the inner bearing platform, simulating the rolling state of the steel ball in the actual bearing operation process. Compared with the existing static pressurization strength test, this design can make the test results closer to the actual use, so as to more accurately evaluate 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 bear the pressure in turn, so as to test the reaction of the steel ball when it is squeezed at different positions. Compared with the static pressure test, the rotation pressure of the steel ball can more accurately reflect the stress distribution of the steel ball in the dynamic working environment, realize the test of dynamic bearing capacity, fatigue resistance and other aspects, and enrich the test content; The steel ball will rub against the lower pressure ring and the upper pressure ring during the rolling process, so as to test the friction coefficient of the steel ball 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 lubrication system and material selection of the bearing; By testing multiple steel balls of the same material at the same time, the influence of uneven force or other accidental factors that may be applied to a single steel ball during testing 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 at the same time, 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 in different application scenarios; 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 it rolls, more comprehensively detecting the performance of different positions on the surface of the steel ball, 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 wear the surface of the steel ball to avoid excessive local wear of the steel ball affecting the test results. It is worth mentioning that the pad has different angles of movement of the steel ball before and after the steel ball is pressurized, which makes the rolling trajectory of the steel ball different in each test, further ensuring the uniformity of the wear of the steel ball; 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 the steel ball being damaged by impact, thus speeding up the strength test efficiency of the steel ball; After each strength test of the steel ball, the steel ball will automatically pop out with the positioning component when the deformation or wear reaches a certain degree. This design can timely find the steel ball with problems after the test, speed up the test process, and the steel ball that has not been ejected can directly proceed to the next round of testing, shortening the test interval and further improving the efficiency of steel ball testing; The cleaning component can collect the debris generated during the test to avoid debris contamination and prevent the debris from affecting the steel ball strength test, thereby ensuring the accuracy of the test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It shows an overall schematic diagram provided according to an embodiment of the present invention; Figure 2 A schematic diagram of a pressing plate provided according to an embodiment of the present invention is shown; Figure 3 A schematic diagram of an inner panel provided according to an embodiment of the present invention is shown; Figure 4 The embodiment of the present invention provides Figure 3 Enlarged view of point A in the middle; Figure 5 A schematic diagram of motor installation according to an embodiment of the present invention is shown; Figure 6 A schematic diagram of an explosion of an outer cylinder provided according to an embodiment of the present invention is shown; Figure 7 A schematic diagram of an airflow path provided according to an embodiment of the present invention is shown; Figure 8 A schematic diagram of a limit frame provided according to an embodiment of the present invention is shown; Fig. 9 A schematic diagram of a spring telescopic rod provided according to an embodiment of the present invention is shown; Fig.10 The embodiment of the present invention provides Fig. 9 Enlarged view of point B in the middle.

[0018] Legend: 10. Base; 11. Hydraulic rod; 12. Connecting plate; 20. Dynamic pressure mechanism; 21. Motor; 22. Inner bearing platform; 221. Lower pressure ring; 23. Pressing plate; 231. Mounting ring; 232. Upper pressure ring; 30. Positioning component; 31. External bearing platform; 32. Limiting frame; 33. Sliding block; 34. Tension spring 1; 35. Fixing plate; 36. Positioning ring; 37. Spring top block; 38. Trigger unit; 381. Housing; 382. Sliding seat; 383. Tension spring 2; 384. Spring telescopic rod; 385. Limiting block; 386. Connecting rod; 387. Reset spring; 388. Spring clamp; 40. Adjustment unit; 41. Inner plate; 42. Inclined block; 43. Support spring; 44. Backing plate; 45. Positioning rod; 50. Cleaning assembly; 51. Inner cylinder; 52. Isolation ring; 53. Filter cylinder; 54. Outer cylinder; 55. Cover; 56. Top cover; 57. Impeller. DETAILED DESCRIPTION

[0019] The following will be combined with the 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 test device for a bearing steel ball. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] like Figure 1-Figure 10 As shown, the present invention provides a bearing steel ball strength multi-point testing device: comprising a base 10, a hydraulic rod 11 is fixedly installed above the base 10, and a connecting plate 12 is fixedly connected to the telescopic end of the hydraulic rod 11, and also includes: The dynamic pressurizing mechanism 20 includes a motor 21 fixedly installed inside the base 10, and an inner bearing platform 22 rotatably connected to the base 10 is fixedly connected to the driving shaft of the motor 21. A pressing plate 23 is arranged below the connecting plate 12. During the strength test, the steel ball is located between the inner bearing platform 22 and the pressing plate 23. The pressing plate 23 is driven by the hydraulic rod 11 to press the steel ball on the inner bearing platform 22 to realize the pressurizing test of the steel ball. The pressing plate 23 is driven by the motor 21 to rotate so that the steel ball can roll during pressurization, and the pressurizing point of the steel ball is switched to simulate the rolling running state of the steel ball in the bearing; A positioning component 30 for preventing the steel ball from moving, the positioning component 30 includes a positioning ring 36 hooped on the outside of the steel ball, and 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 that when the number of steel balls is two, three, four, and six, the steel balls can be evenly distributed between the inner bearing platform 22 and the pressing plate 23, thereby reducing the uneven force on the pressing plate 23 during the pressurization process; 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 pressing plate 23 rolls at a fixed point under the hoop of the positioning ring 36 .

[0021] 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.

[0022] 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. 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 inside of the limit frame 32. A fixing plate 35 fixed to the positioning ring 36 is fixedly connected to one side of the slider 33. By sliding the slider 33 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 hand between the inner bearing platform 22 and the pressure plate 23, thereby improving the safety of the device.

[0023] Reference Figure 8 and Fig. 9 and Fig.10A tension spring 34 which is always in a tensioned state 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, and a slide seat 382 is slidably connected inside the shell 381. A tension spring 383 which is also always in a tensioned state 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. The telescopic end of the spring telescopic rod 384 is conical and the tip is provided with a ball bearing that contacts the steel ball. The ball bearing is used to reduce the friction between the spring telescopic rod 384 and the steel ball. A connecting rod 386 is slidably connected inside the fixed plate 35. The top of the connecting rod 386 is fixedly connected to the limiting block 385. The limiting block 385 abuts against the bottom of the slide seat 382. A spring block 388 is installed at the bottom end of the connecting rod 386. The spring block 388 is embedded in the interior of the outer bearing platform 31 to lock the position of the fixed plate 35. When the cam 386 is in a state of being compressed, a return spring 387 which is always in a compressed state is provided between the cam 386 and the fixing plate 35, applying an upward elastic force to the connecting rod 386. When the steel ball is worn or pressed to produce a concave deformation, the tension of the tension spring 283 will drive the slide seat 382 to move in the direction of the steel ball, so that 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 disengage from the outer bearing platform 31, so that the fixing plate 35 is unlocked from the outer bearing platform 31. At this time, the tension of the tension spring 1 34 drives the slide block 33 and the fixing plate 35 to move. When the steel ball is no longer pressurized, the fixing plate 35 drives the positioning ring 36 to automatically pull the worn or pressed steel ball out from between the inner bearing platform 22 and the pressure plate 23, thereby speeding up the speed of identifying the quality of the steel ball, and there is no need to manually remove the steel ball from between the inner bearing 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.

[0024] Reference Fig.10, one side of the limit block 385 is provided with a stepped inclined sawtooth. After the limit block 385 moves upward, the sawtooth prevents the slide seat 382 from squeezing the limit block 385 to reset it. When the position of the wear or concave deformation on the steel ball intersects with the spring telescopic rod 384, the squeezing from the steel ball can only cause the spring telescopic rod 384 to compress itself, and will not change the position of the slide seat 382 and the limit block 385. As long as the tip of the spring telescopic rod 384 detects that the steel ball has reached a predetermined wear or concave degree, the spring block 388 can be detached from the inside of the outer bearing platform 31, so that it is fixed by the slider 33 after the steel ball stops pressurizing. 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 that the connecting rod 386 can be pressed down without aligning the spring block 388 with the slot on the outer bearing platform 31. 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.

[0025] Reference Figure 3 and Figure 4 , and also includes an adjusting unit 40, which includes an inner plate 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 inside the pressing plate 23, and a pad 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 that penetrates the pressing plate 23 is fixedly connected to the bottom of the inner plate 41. After the hydraulic rod 11 extends to drive the connecting plate 12, the inner plate 41 and the pressing plate 23 to move downward, the pad 44 at the bottom of the pressing plate 23 will contact the top of the steel ball, and the steel ball supports the pad 44 and the pressing plate 23. At this time, the inner plate 41 continues to move downward, which will cause relative sliding between the inner plate 41 and the pressing plate 23, and the inner plate 41 squeezes the inclined block 42 to drive the pad 44 to move, and there is a gap between the pad 44 and the steel ball. The steel ball is driven to rotate under the action of the friction force between the two, so as to adjust 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 supporting 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 make the pressure plate 23 move up and separate from the steel ball, the pad 44 is reset under the elastic force of the supporting spring 43. Since the pressure between the pad 44 and the steel ball changes at this time, the friction force between the two changes. The movement of the pad 44 drives the steel ball to rotate with a different amplitude from the amplitude of the steel wire rotation before the steel ball is pressurized, thereby changing the angle at which the steel ball is moved.

[0026] Reference Figure 4 Figure 7 and Figure 8 Spring top blocks 37 are installed around the inner wall of the positioning ring 36. The position of the steel ball can be further limited by the upper and lower sets of spring top blocks 37, 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 arranged 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, which are used to reduce the friction of the steel ball, the mounting ring 231 and the inner bearing platform 22 when the steel ball strength is tested.

[0027] Reference Figure 5 and Figure 6 , also includes a cleaning component 50, the cleaning component 50 includes an inner cylinder 51 rotatably connected to the inner bearing platform 22, an impeller 57 is fixedly connected to the driving shaft of the motor 21, the outer cylinder 54 is fixedly connected to the outside of the inner cylinder 51, a filter cylinder 53 is placed inside the inner cylinder 51, the filter cylinder 53 filters the debris through the bottom filter screen, and the top of the inner cylinder 51 is covered with a top cover 56. 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 and drives the impeller 57 to rotate at the same time, 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 to prevent the debris from interfering with the test of the steel ball.

[0028] 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 support 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, so as to avoid the debris 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, so as to prevent the air sucked in from the top air inlet of the outer cylinder 54 from directly entering the inner cylinder 51, resulting in a reduction in the suction force of the bottom air inlet of the outer cylinder 54, thereby balancing the suction force at the top and bottom of the outer cylinder 54, and thereby improving the effect of absorbing debris.

[0029] Working principle: manually press down the connecting rod 386 to drive the limit block 385 to move downward, and then insert the steel ball between the two groups 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 seat 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. As the connecting rod 386 moves downward, the spring inside the spring block 388 is compressed. Manually push the tension spring 1 34 and the fixed plate 35 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 elastic force of the spring to lock the fixed plate 35. At this time, the steel ball is located between the lower pressure ring 221 and the upper pressure ring 232; The hydraulic rod 11 is controlled to extend to drive the connecting plate 12, the inner plate 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 plate 41 is continued to move downward to squeeze the inclined block 42, so that the inclined block 42 drives the pad 44 to move outward, so that the pad 44 drives the steel ball to rotate, and the angle of the steel ball is adjusted. 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 continued to be controlled to extend to apply pressure to the steel ball. The motor 21 is started to drive the inner bearing platform 22 and the lower pressure ring 221 to rotate, so that the steel ball rotates 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; When the steel ball is worn or 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 lost to block it, 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 elastic 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.

[0030] The above are only preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes to a multi-point testing device for the strength of a bearing steel ball and its inventive concept according to the technology of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. 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), 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 driving shaft of the motor (21), and a pressing plate (23) being arranged 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) encircled on the outside of the steel ball, twelve positioning rings (36) being 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).

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 fixedly provided at 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. A bearing steel ball strength multi-point testing device according to claim 2, characterized in that: The positioning component (30) further comprises 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 a positioning ring (36) is fixedly connected to one side of the slider (33).

4. A bearing steel ball strength multi-point testing device according to claim 1, characterized in that: The adjusting unit (40) further comprises an adjusting unit (40), wherein the adjusting unit (40) comprises an inner plate (41) fixed to the bottom of the connecting plate (12) and slidably connected to the pressing plate (23), an inclined block (42) being slidably connected inside the pressing plate (23), a pad (44) being fixedly connected to the bottom of the inclined block (42), a supporting spring (43) being provided inside the pressing plate (23), and a positioning rod (45) penetrating the pressing plate (23) being fixedly connected to the bottom of the inner plate (41).

5. A bearing steel ball strength multi-point testing device according to claim 3, characterized in that: A tension spring (34) is provided between the sliding block (33) and the limiting frame (32), and a trigger unit (38) is provided inside the fixing plate (35).

6. A bearing steel ball strength multi-point testing device according to claim 5, characterized in that: The trigger unit (38) comprises a shell (381) fixed to a fixed plate (35); a slide seat (382) is slidably connected inside the shell (381); a second 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 inside the fixed plate (35); the top end of the connecting rod (386) is fixedly connected to a limiting block (385); a spring clamping 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).

7. A bearing steel ball strength multi-point testing device according to claim 5, characterized in that: One side of the limiting block (385) is provided with stepped inclined saw teeth.

8. A bearing steel ball strength multi-point testing device according to claim 3, 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).

9. 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 support 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).

10. A bearing steel ball strength multi-point testing device according to claim 9, 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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