A rolling bearing ring fatigue life testing machine

Abstract

This utility model discloses a fatigue life testing machine for rolling bearing rings, relating to the field of rolling bearing ring testing technology. It includes a support frame, with a testing motor fixedly mounted at the lower end of the support frame. A support shaft is fixedly mounted at the end of the output shaft of the testing motor. Two symmetrically arranged connecting plates are fixedly mounted on the shaft wall of the support shaft, and a limiting ring is fixedly mounted through the two connecting plates. A positioning bolt is threaded through the side of the limiting ring. A groove is formed at the end of the support shaft, and a drive adjustment mechanism is provided within the groove. Multiple radially evenly distributed push plates are provided through the drive adjustment mechanism. A hydraulic cylinder is fixedly mounted on the top of the inner wall of the support frame, and a pressure sensor is fixedly mounted at the end of the output shaft of the hydraulic cylinder. A testing pressure rod is fixedly mounted at the detection end of the pressure sensor. This utility model enables bearing rings of various specifications to be positioned and fitted with the testing shaft of the testing motor for rapid fatigue testing, improving the versatility of the testing equipment.

Description

Technical Field

[0001] This utility model relates to the field of rolling bearing ring testing technology, specifically to a rolling bearing ring fatigue life testing machine. Background Technology

[0002] The fatigue life of rolling bearing races is a core indicator determining the overall reliability of the bearing. Fatigue failure, such as surface damage, directly affects the operational safety and maintenance costs of mechanical equipment. For example, patent document CN204101290U discloses a rolling bearing race fatigue life testing machine. In this machine, the motor is started, and the driving roller rotates under the motor's drive. The driven roller rotates along with the driving roller under the action of friction, the magnitude of which changes with the weights. We only need to observe the test races on the two rollers; over time, races with poor surface quality will be the first to pit and peel off.

[0003] However, the current bearing ring specifications are different, while the specifications of the shaft used for installation inside the testing machine are fixed. This makes it impossible for different bearing rings to be connected and matched with the testing machine, resulting in the instability of the bearing ring fatigue test. Summary of the Invention

[0004] In view of the problems existing in the current rolling bearing ring fatigue life testing machine, this utility model is proposed.

[0005] Therefore, the purpose of this utility model is to provide a rolling bearing ring fatigue life testing machine, which solves the problem that existing testing machines cannot be adapted to the installation and positioning of bearing rings of various specifications.

[0006] To achieve the above objectives, this utility model provides the following technical solution: A rolling bearing ring fatigue life testing machine includes a support frame, a testing motor fixedly mounted at the lower end of the support frame, a support shaft fixedly mounted at the output shaft end of the testing motor, two symmetrically arranged connecting plates fixedly mounted on the shaft wall of the support shaft, and a limiting ring fixedly mounted through the two connecting plates, a positioning bolt threaded through the side of the limiting ring, a groove opened at the end of the support shaft, a drive adjustment mechanism provided in the groove, and multiple radially uniformly distributed push plates provided through the drive adjustment mechanism; A hydraulic cylinder is fixedly installed on the top of the inner wall of the support frame, a pressure sensor is fixedly installed at the end of the output shaft of the hydraulic cylinder, and a detection rod is fixedly installed at the detection end of the pressure sensor.

[0007] Preferably, the drive adjustment mechanism includes a drive bolt, which is threaded in the groove, and a push block is fixedly sleeved on the upper end of the rod wall. The end of the support shaft has multiple sliding grooves, which are connected to the groove. A movable plate slides through the sliding groove, one end of the movable plate is fixedly connected to the push plate, and the other end of the movable plate is fixedly equipped with a movable block. The push block and the movable block are configured to cooperate with each other. A crank handle is fixedly installed at the end of the drive bolt.

[0008] Preferably, the pushing block is a frustum block, the moving block is a wedge block, and the inclined surfaces of the pushing block and the moving block cooperate with each other.

[0009] Preferably, a guide block is fixedly provided on the inner wall of the slide groove, a guide groove is provided inside the movable plate, the guide block is slidably disposed in the guide groove, and a spring is fixedly provided between the guide block and the inner wall of the guide groove.

[0010] Furthermore, the guide block is an I-shaped block.

[0011] Preferably, the outer wall of the push plate is arc-shaped.

[0012] The technical effects and advantages provided by this utility model in the above technical solution are as follows: 1. This utility model, through the provided pressure sensor, detection rod, detection motor, support shaft, connecting plate, push plate, drive adjustment mechanism, and positioning bolts, enables bearing rings of various specifications to be positioned and matched with the detection shaft of the detection motor for rapid fatigue testing, thereby improving the versatility of the testing equipment. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0014] Figure 1 This is a schematic diagram of the structure of this utility model.

[0015] Figure 2 For the present utility model Figure 1 Enlarged schematic diagram of part A.

[0016] Figure 3 This is an internal sectional view of the support shaft of this utility model.

[0017] Explanation of reference numerals in the attached figures: 1. Support frame; 2. Detection motor; 3. Support shaft; 4. Connecting plate; 5. Limiting ring; 6. Positioning bolt; 7. Groove; 8. Push plate; 9. Hydraulic cylinder; 10. Pressure sensor; 11. Detection rod; 12. Drive bolt; 13. Push block; 14. Slide groove; 15. Moving plate; 16. Moving block; 17. Handle; 18. Guide block; 19. Spring. Detailed Implementation

[0018] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0019] This utility model discloses a rolling bearing ring fatigue life testing machine.

[0020] This utility model provides, for example Figure 1-3 The rolling bearing ring fatigue life testing machine shown includes a support frame 1. A testing motor 2 is fixedly mounted on the lower end of the support frame 1. A support shaft 3 is fixedly mounted on the output shaft end of the testing motor 2. Two symmetrically arranged connecting plates 4 are fixedly mounted on the shaft wall of the support shaft 3, and a limiting ring 5 is fixedly mounted through the two connecting plates 4. A positioning bolt 6 is threaded through the side of the limiting ring 5. A groove 7 is opened at the end of the support shaft 3. A drive adjustment mechanism is provided in the groove 7, and multiple radially evenly distributed push plates 8 are provided through the drive adjustment mechanism. The outer wall of the push plates 8 is arc-shaped. The drive adjustment mechanism includes a drive bolt 12, which is threaded in the groove 7, and a push block 13 is fixedly sleeved on the upper end of the rod wall. Multiple sliding grooves 14 are provided at the end of the support shaft 3. The sliding grooves 14 are connected to the grooves 7. A movable plate 15 slides through the sliding groove 14. One end of the movable plate 15 is fixedly connected to the push plate 8. A guide block 18 is fixedly provided on the inner wall of the sliding groove 14. The guide block 18 is an I-shaped block. A guide groove is provided inside the movable plate 15. The guide block 18 slides in the guide groove. A spring 19 is fixed between the guide block 18 and the inner wall of the guide groove. A movable block 16 is fixedly provided at the other end of the movable plate 15. A push block 13 is configured to cooperate with the movable block 16. The push block 13 is a frustum block and the movable block 16 is a wedge block. The inclined surfaces of the push block 13 and the movable block 16 cooperate with each other. A crank handle 17 is fixedly provided at the end of the drive bolt 12.

[0021] In order to control the pressure adjustment during the testing process and ensure testing accuracy, such as Figure 1 As shown, a hydraulic cylinder 9 is fixedly installed on the top of the inner wall of the support frame 1, a pressure sensor 10 is fixedly installed at the end of the output shaft of the hydraulic cylinder 9, and a detection pressure rod 11 is fixedly installed at the detection end of the pressure sensor 10.

[0022] Working principle: The bearing ring to be tested is placed on the support shaft 3, so that one end of the bearing ring is in contact with the limiting ring 5. Then, the crank handle 17 is turned, which drives the drive bolt 12 to rotate in the groove 7. When the drive bolt 12 rotates, it drives the push block 13 to move synchronously. Since the push block 13 is a frustum block and the moving block 16 is a wedge block and the two are in inclined surface cooperation, the push block 13 will generate radial thrust on the moving block 16 during the movement, so that the moving block 16 drives the moving plate 15 to slide in the slide groove 14. When the moving plate 15 slides, it drives the push plate 8 to move synchronously until the arc-shaped outer wall of the push plate 8 is tightly in contact with the inner wall of the bearing ring. Then, the positioning bolt 6 is rotated to fix the side of the bearing ring with constant pressure, thus completing the precise positioning of bearing rings of different specifications. At the same time, the guide block 18 slides in the guide groove of the moving plate 15, and the spring 19 can buffer and reset the movement of the moving plate 15. After positioning is completed, the detection motor 2 is started. The output shaft of the detection motor 2 drives the support shaft 3 to rotate, which in turn drives the bearing ring to rotate synchronously. Then, the hydraulic cylinder 9 is controlled to work. The output shaft of the hydraulic cylinder 9 pushes the pressure sensor 10 and the detection rod 11 downward, so that the detection rod 11 contacts the surface of the rotating bearing ring and applies pressure. The pressure sensor 10 detects the pressure value applied to the bearing ring in real time to ensure that the pressure meets the test requirements. During the continuous rotation of the bearing ring and the application of stable pressure, the surface of the bearing ring is observed to see if there is fatigue damage such as pitting or peeling. At the same time, the fatigue life of the bearing ring is tested by combining the pressure data fed back by the pressure sensor 10 and the running time of the detection motor 2. If the test is over or the bearing ring needs to be replaced, the handle 17 is turned in the opposite direction. The pushing force of the push block 13 on the moving block 16 disappears, the spring 19 resets and drives the moving plate 15 and the push plate 8 to move back, releasing the fixation of the bearing ring, and the bearing ring can be removed.

[0023] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A rolling bearing ring fatigue life testing machine, comprising a support frame (1), characterized in that, The lower end of the support frame (1) is fixedly provided with a detection motor (2), and the output shaft end of the detection motor (2) is fixedly provided with a support shaft rod (3). The shaft wall of the support shaft rod (3) is fixedly provided with two symmetrically arranged connecting plates (4), and a limiting ring (5) is fixedly provided through the two connecting plates (4). The side of the limiting ring (5) is threaded with a positioning bolt (6). The end of the support shaft rod (3) is provided with a groove (7), and a drive adjustment mechanism is provided in the groove (7). Multiple push plates (8) are provided in a radially uniform distribution through the drive adjustment mechanism. A hydraulic cylinder (9) is fixedly installed on the top of the inner wall of the support frame (1). A pressure sensor (10) is fixedly installed at the end of the output shaft of the hydraulic cylinder (9). A detection rod (11) is fixedly installed at the detection end of the pressure sensor (10).

2. The rolling bearing ring fatigue life testing machine according to claim 1, characterized in that, The drive adjustment mechanism includes a drive bolt (12), which is threaded in the groove (7) and a push block (13) is fixedly sleeved on the upper end of the rod wall. The end of the support shaft (3) is provided with multiple sliding grooves (14), which are connected to the groove (7). A moving plate (15) slides through the sliding groove (14). One end of the moving plate (15) is fixedly connected to the push plate (8), and the other end of the moving plate (15) is fixedly provided with a moving block (16). The push block (13) and the moving block (16) are configured to cooperate. The end of the drive bolt (12) is fixedly provided with a crank handle (17).

3. The rolling bearing ring fatigue life testing machine according to claim 2, characterized in that, The pushing block (13) is a frustum block, and the moving block (16) is a wedge block. The inclined surfaces of the pushing block (13) and the moving block (16) cooperate with each other.

4. The rolling bearing ring fatigue life testing machine according to claim 2, characterized in that, The inner wall of the slide (14) is fixedly provided with a guide block (18), the inside of the moving plate (15) is provided with a guide groove, the guide block (18) is slidably disposed in the guide groove, and a spring (19) is fixedly provided between the guide block (18) and the inner wall of the guide groove.

5. The rolling bearing ring fatigue life testing machine according to claim 4, characterized in that, The guide block (18) is an I-shaped block.

6. The rolling bearing ring fatigue life testing machine according to claim 1, characterized in that, The outer wall of the push plate (8) is arc-shaped.

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