Bearing fatigue life testing machine

Abstract

The utility model belongs to the technical field of mechanical engineering, and particularly relates to a bearing fatigue life testing machine which comprises a bottom plate, a support fixedly connected to the top of the bottom plate, a driving mechanism arranged at the top of the support and comprising an air cylinder located at the top of the support, a motor connected to the telescopic end of the air cylinder, and a top seat connected to the output end of the motor. A base is rotationally connected above the bottom plate, a bearing to be detected sleeves the base, and applying mechanisms are connected to the two sides of the support. Through the combined application of the cylinder and the motor, the test machine can realize the efficient and accurate test of the to-be-detected bearing. The air cylinder provides stable thrust, the stability of the bearing in the testing process is guaranteed, and the motor is responsible for driving the bearing to rotate and simulating the fatigue load in the actual working state. The optimal design of the mechanical structure not only improves the testing efficiency and accuracy, but also reduces the dependence on a complex intelligent control system, thereby effectively controlling the cost of the testing machine.

Description

Technical Field

[0001] The utility model belongs to the technical field of mechanical engineering, and in particular relates to a bearing fatigue life testing machine. Background Art

[0002] Bearings are key components in mechanical equipment, and their fatigue life is directly related to the performance and reliability of the entire equipment. In order to ensure the quality of bearings and meet their service life requirements, bearings must be fatigue tested. The existing patent application CN202022776112.X discloses a fatigue test platform for the main bearing of an RV reducer, which can dynamically simulate the action of the alternating force couple of planetary gears in actual operation, and provide practical basic data for the reliability analysis of the RV reducer by collecting the vibration and temperature data of the main bearing in real time. Although the platform has made progress in simulating actual working conditions, there are still limitations in the adaptability and cost control of the equipment.

[0003] Patent announcement number CN220270790U discloses a bearing fatigue test device, which applies radial and axial forces to the bearing to be tested through a motor-driven mechanical structure, and can be applied to bearing tests of different specifications. The design of this device simplifies the force adjustment mechanism and does not require a complex intelligent control system, thereby reducing the cost of the equipment. However, there is still room for improvement in the complexity of simulating the actual working conditions of the bearing and the degree of automation of the test process. Utility Model Content

[0004] In view of the problems existing in the prior art, the purpose of the utility model is to provide a bearing fatigue life testing machine, which can not only efficiently and accurately simulate various stress states of bearings under actual working conditions, but also adapt to bearings of different sizes and types, while ensuring the stability and repeatability of the testing process.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A bearing fatigue life testing machine comprises a base plate, the top of the base plate is fixedly connected to a bracket, the top of the bracket is provided with a driving mechanism, the driving mechanism comprises a cylinder located at the top of the bracket, the telescopic end of the cylinder is connected to a motor, the output end of the motor is connected to a top seat, the top of the base plate is rotatably connected to a base, the base is sleeved with a bearing to be tested, and both sides of the bracket are connected to an application mechanism.

[0007] Furthermore, a limiting ring is provided at the center of the upper end surface of the bottom plate, and the base is located in the limiting ring;

[0008] The shape of the base is set to be a truncated cone, and a plug-in groove is opened at the center of the top of the base, and a positioning groove is opened on the outer side of the base, and the positioning grooves are distributed at equal intervals around the central axis of the base.

[0009] Furthermore, the top seat is configured to be conical, and positioning plates are evenly distributed on the outside of the top seat around its central axis, and the positioning plates correspond to the positioning grooves;

[0010] The positioning plate is movably connected with a lower pressing plate, the upper end surface of the lower pressing plate is symmetrically fixedly connected with a positioning column, and a spring is sleeved on the positioning column;

[0011] The upper end surface of the positioning plate is penetrated by a through hole corresponding to the positioning column.

[0012] Furthermore, a flange ring is fixedly connected to the top of the top seat, a connecting seat is provided at the output end of the motor, and the connecting seat and the flange ring are connected to each other by bolts.

[0013] Furthermore, the applying mechanism includes a friction plate, a guide column is symmetrically fixedly connected to the side of the friction plate, and a rotating seat is provided on the side of the friction plate, a threaded rod is rotatably connected to the rotating seat, and one end of the threaded rod is connected to a rotating handle.

[0014] Furthermore, a threaded hole is formed through the side surface of the bracket, and the threaded rod is connected in the threaded hole;

[0015] A guide hole corresponding to the guide column is symmetrically opened through the side surface of the bracket, and the guide column is inserted into the guide hole.

[0016] Furthermore, fixing holes are symmetrically formed through the upper end surface of the bottom plate.

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] Through the combined application of cylinders and motors, this test machine can achieve efficient and accurate testing of bearings to be tested. The cylinder provides stable thrust to ensure the stability of the bearing during the test, while the motor is responsible for driving the bearing to rotate and simulate the fatigue load under actual working conditions. This optimized design of the mechanical structure not only improves the efficiency and accuracy of the test, but also reduces the dependence on complex intelligent control systems, thereby effectively controlling the cost of the test machine.

[0019] The application mechanism design adopted by this test machine enables the equipment to adapt to the testing of bearings of different specifications. Through the cooperation of the friction plate and the threaded rod, the test machine can accurately adjust the force applied to the outer ring of the bearing to simulate different working conditions. This flexible and adaptable design enables the test machine to not only test bearings of a single specification, but also to cope with diverse testing needs, greatly improving the versatility and practicality of the equipment.

[0020] Through the unique design of the base and top seat, this test machine has significant advantages in ensuring the stability and accuracy of the bearing during the test. The frustum design of the base and the conical design of the top seat, combined with the positioning groove and positioning plate, not only achieves the precise positioning and fixation of the bearing to be tested, but also automatically adjusts the pressure through the use of the lower pressure plate and spring to adapt to the testing of bearings of different specifications. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the utility model;

[0022] Figure 2 It is a structural schematic diagram of the driving mechanism of the utility model;

[0023] Figure 3 It is a structural schematic diagram of the base of the utility model;

[0024] Figure 4 It is a structural schematic diagram of the top seat of the utility model;

[0025] Figure 5 It is a structural schematic diagram of the application mechanism of the utility model.

[0026] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0027] 1. Bottom plate; 11. Fixing hole; 12. Limiting ring;

[0028] 2. Bracket; 21. Threaded hole; 22. Guide hole;

[0029] 3. Driving mechanism; 31. Cylinder; 32. Motor; 33. Connecting seat;

[0030] 4. Base; 41. Plug-in slot; 42. Positioning slot;

[0031] 5. Top seat; 51. Flange ring; 52. Positioning plate; 521. Through hole; 53. Lower pressure plate; 531. Positioning column; 54. Spring;

[0032] 6. Bearings;

[0033] 7. applying mechanism; 71. friction plate; 711. rotating seat; 712. guide column; 72. threaded rod; 73. rotating handle. DETAILED DESCRIPTION

[0034] In order to make the purpose and advantages of the utility model more clear, the utility model is specifically described in combination with the following embodiments. It should be understood that the following text is only used to describe one or several specific implementations of the utility model, and does not strictly limit the protection scope of the specific request of the utility model.

[0035] See also Figure 1-5 , a bearing fatigue life tester, comprising a base plate 1; a bracket 2 is fixedly connected to the top of the base plate 1, and a driving mechanism 3 is arranged on the top of the bracket 2; the driving mechanism 3 comprises a cylinder 31 located at the top of the bracket 2, and a motor 32 is connected to the telescopic end of the cylinder 31; a top seat 5 is connected to the output end of the motor 32, and a base 4 is rotatably connected to the top of the base plate 1, and a bearing 6 to be tested is sleeved on the base 4; both sides of the bracket 2 are connected to an applying mechanism 7. The design of the bearing fatigue life tester comprehensively considers the improvement requirements for the existing technology proposed in the background technology, especially the optimization for adaptability and cost control; through the coordinated use of the cylinder 31 and the motor 32, efficient and accurate testing of the bearing 6 to be tested can be achieved, and at the same time, the design of the applying mechanism 7 enables the equipment to fix and test bearings of different specifications, thereby improving the adaptability and testing efficiency of the equipment.

[0036] See also Figure 2-3 , a limiting ring 12 is arranged at the center of the upper end surface of the bottom plate 1, and the base 4 is located in the limiting ring 12; the shape of the base 4 is set to be a truncated cone, and a plug-in slot 41 is opened at the center of the top of the base 4, and a positioning slot 42 is opened on the outside of the base 4, and the positioning slots 42 are evenly spaced around the central axis of the base 4. This design not only enhances the structural stability of the bearing fatigue life tester, but also realizes the precise positioning and fixation of the bearing 6 to be tested through the cooperation between the positioning slot 42 and the positioning plate 52 of the top seat 5, ensuring the accuracy and repeatability of the test process.

[0037] See also Figure 3-4 The top seat 5 is set in a conical shape, and the outer side of the top seat 5 is evenly spaced around the central axis, and the positioning plates 52 correspond to the positioning grooves 42; the positioning plate 53 is movably connected to the positioning plate 52, and the upper end surface of the lower pressing plate 53 is symmetrically fixedly connected to the positioning column 531, and the positioning column 531 is sleeved with a spring 54; the upper end surface of the positioning plate 52 is penetrated by a through hole 521 corresponding to the positioning column 531. This structural design further improves the test stability and operational flexibility of the bearing fatigue life tester. Through the elastic action of the spring 54, the pressure of the lower pressing plate 53 on the bearing 6 to be tested can be automatically adjusted to adapt to the test of bearings of different specifications, while ensuring the stability of the bearing during the test and the accuracy of the test.

[0038] See also Figure 4 The top of the top seat 5 is fixedly connected with a flange ring 51, and the output end of the motor 32 is provided with a connecting seat 33, and the connecting seat 33 and the flange ring 51 are connected to each other by bolts. This connection method ensures the stable connection between the top seat 5 and the motor 32, thereby ensuring the stable rotation of the top seat 5 during the test, which is of great significance for improving the efficiency and accuracy of the bearing fatigue test.

[0039] See also Figure 5 The applying mechanism 7 includes a friction plate 71, and the side of the friction plate 71 is symmetrically fixedly connected with a guide column 712

[0040] , and a rotating seat 711 is arranged on the side of the friction plate 71, a threaded rod 72 is rotatably connected to the rotating seat 711, and one end of the threaded rod 72 is connected to a rotating handle 73. The design of the applying mechanism 7, especially the coordinated work of the friction plate 71 and the threaded rod 72, provides more diverse test conditions for the bearing fatigue life test. By adjusting the threaded rod 72, the applied force on the outer ring of the bearing can be accurately controlled, thereby simulating different working conditions and improving the application range and accuracy of the test.

[0041] See also Figure 2 and Figure 5 , a threaded hole 21 is formed through the side of the bracket 2, and the threaded rod 72 is connected to the threaded hole 21; a guide hole 22 corresponding to the guide column 712 is formed through the side of the bracket 2 symmetrically, and the guide column 712 is inserted into the guide hole 22. This structural design not only ensures the stability and accuracy of the application mechanism 7, but also enhances the structural stability and operational flexibility of the entire device through the coordinated use of the guide column 712 and the guide hole 22.

[0042] See also Figure 2 The upper end surface of the bottom plate 1 is symmetrically penetrated with fixing holes 11. The fixing holes 11 provide an additional fixing option for the bearing fatigue life tester, increase the applicability and stability of the equipment in different test environments, and ensure the stability and safety of the tester when conducting high-intensity and long-term fatigue life tests.

[0043] The working principle of the utility model is:

[0044] When in use, the bearing 6 to be tested is sleeved on the base 4, and then the top seat 5 is driven downward by the cylinder 31. As the height of the top seat 5 is gradually reduced, the bottom of the top seat 5 is inserted into the insertion groove 41, and at the same time, the lower pressing plate 53 is deeply inserted into the positioning groove 42;

[0045] When the height of the top seat 5 is further lowered, the top of the base 4 will be expanded outward, thereby fixing the inner ring of the bearing 6, and as the lower pressure plate 53 contacts the edge of the bearing, the bearing 6 can be placed horizontally during the test, and then the handle 73 is rotated. As the handle 73 rotates, the friction plate 71 will approach the outer ring of the bearing 6, and the outer ring of the bearing can be clamped and fixed by the relatively arranged application mechanism 7;

[0046] With the cooperation between the base 4 and the top seat 5, bearings 6 of different sizes can be fixed, and at the same time, under the action of the lower pressure plate 53, the fixed bearings can be placed more stably;

[0047] After the bearing 6 is fixed, the motor 32 is used to drive the top seat 5 to rotate, thereby driving the bearing 6 to rotate, and performing an anti-fatigue test on it.

[0048] The above is only a preferred embodiment of the present invention. It should be noted that, for ordinary technicians in the technical field, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention shall be implemented according to the conventional means in the field unless otherwise specified and limited.

Claims

1. A bearing fatigue life testing machine, comprising a base plate (1), characterized in that: The top of the base plate (1) is fixedly connected to a bracket (2), the top of the bracket (2) is provided with a driving mechanism (3), the driving mechanism (3) comprises a cylinder (31) located at the top of the bracket (2), the telescopic end of the cylinder (31) is connected to a motor (32), the output end of the motor (32) is connected to a top seat (5), the top of the base plate (1) is rotatably connected to a base (4), the base (4) is provided with a bearing (6) to be detected, and both sides of the bracket (2) are connected to an application mechanism (7).

2. A bearing fatigue life testing machine according to claim 1, characterized in that: A limiting ring (12) is provided at the center of the upper end surface of the bottom plate (1), and the base (4) is located inside the limiting ring (12); The base (4) is shaped as a truncated cone, a plug-in slot (41) is provided at the center of the top of the base (4), and a positioning slot (42) is provided on the outer side of the base (4), and the positioning slots (42) are distributed at equal intervals around the central axis of the base (4).

3. A bearing fatigue life testing machine according to claim 2, characterized in that: The top seat (5) is configured to be conical, and positioning plates (52) are distributed at equal intervals around the central axis of the top seat (5), and the positioning plates (52) correspond to the positioning grooves (42); The positioning plate (52) is movably connected to a lower pressing plate (53), the upper end surface of the lower pressing plate (53) is symmetrically fixedly connected to a positioning column (531), and the positioning column (531) is sleeved with a spring (54); The upper end surface of the positioning plate (52) is penetrated by a through hole (521) corresponding to the positioning column (531).

4. A bearing fatigue life testing machine according to claim 1, characterized in that: A flange ring (51) is fixedly connected to the top of the top seat (5), and a connecting seat (33) is provided at the output end of the motor (32). The connecting seat (33) and the flange ring (51) are connected to each other via bolts.

5. The bearing fatigue life testing machine according to claim 1, characterized in that: The applying mechanism (7) comprises a friction plate (71), the side surface of the friction plate (71) is symmetrically fixedly connected with a guide column (712), and the side surface of the friction plate (71) is provided with a rotating seat (711), the rotating seat (711) is rotatably connected with a threaded rod (72), and one end of the threaded rod (72) is connected to a rotating handle (73).

6. A bearing fatigue life testing machine according to claim 5, characterized in that: A threaded hole (21) is formed through the side surface of the bracket (2), and the threaded rod (72) is connected to the threaded hole (21); A guide hole (22) corresponding to the guide column (712) is symmetrically formed through the side surface of the bracket (2), and the guide column (712) is inserted into the guide hole (22).

7. A bearing fatigue life testing machine according to claim 1, characterized in that: The upper end surface of the bottom plate (1) is symmetrically penetrated with fixing holes (11).

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