An RV reducer bearing life testing machine

Abstract

This application relates to the field of mechanical testing, and in particular to an RV reducer bearing life testing machine, which includes a bearing housing with a mounting cavity, a temperature sensor, a vibration sensor, a loading shaft, a variable frequency motor, a transmission structure, and a loading structure. The mounting cavity is used to mount a single reducer bearing. The temperature sensor detects the temperature of the mounting cavity, the vibration sensor detects the vibration of the bearing housing, the variable frequency motor drives the loading shaft to rotate, and the loading structure applies a load to the loading shaft. This application achieves the technical effect of enabling life testing of RV reducer bearings, detecting their temperature and vibration conditions, simulating different speed and load conditions, and providing data support for evaluating bearing life.

Description

Technical Field

[0001] This application relates to the field of mechanical testing, and in particular to an RV reducer bearing life testing machine. Background Technology

[0002] As a core component of industrial robots, the performance of RV reducers directly affects the robot's operational accuracy, stability, and service life. RV reducer bearings, as a critical component, play a vital role in the overall performance of the RV reducer. Accurately testing the enhanced life of individual RV reducer bearings provides crucial information for RV reducer design optimization and quality improvement, thereby promoting the development of the industrial robot industry and enhancing the automation level and production efficiency of industrial production. Therefore, the industry places great emphasis on the enhanced life performance testing of individual RV reducer bearings.

[0003] In previous RV reducer bearing life tests, two or four sets of bearings were typically installed to test bearing life. The force calculation for a single bearing set was obtained by averaging the forces acting on both sets of bearings and dividing by 2. The monitoring and control system could only detect the vibration of the entire housing, which was the combined vibration of all bearings operating simultaneously.

[0004] Existing technologies have several shortcomings. The previous method of installing two or four sets of bearings simultaneously cannot realistically and effectively simulate the direct load on a single bearing, and the old equipment was extremely inconvenient, time-consuming, and labor-intensive to install. Existing technologies cannot directly load a single bearing; during the test, the test bearing is affected by interference from other bearings, leading to unreasonable test processes and results. The measurement and control system can only detect the vibration of the entire cavity and cannot confirm the vibration magnitude of each bearing, resulting in mutual interference factors and making the test process and results unreasonable. Utility Model Content

[0005] To simulate the operation of a single reducer bearing, this application provides an RV reducer bearing life testing machine.

[0006] This application provides an RV reducer bearing life testing machine, which adopts the following technical solution: An RV reducer bearing life testing machine includes a bearing housing, a temperature sensor, and a vibration sensor. The bearing housing is provided with a mounting cavity for mounting a single set of reducer bearings. The temperature sensor is connected to the bearing housing and is used to detect the temperature of the mounting cavity. The vibration sensor is connected to the bearing housing and is used to detect the vibration of the bearing housing.

[0007] By adopting the above technical solution, a single set of RV reducer bearings can be installed and tested. It can realistically and effectively simulate the load conditions of a single set of bearings, and can also directly detect the temperature and vibration of a single set of bearings, eliminating interference between test samples, and making the test process and results more accurate and reasonable.

[0008] Preferably, the bearing housing includes a housing body and an end cap. The base is provided with a mounting groove. The end cap is detachably connected to the base body, and the end cap covers the opening of the mounting groove. The end cap surface and the inner wall of the mounting groove together form the mounting cavity.

[0009] By adopting the above technical solution, the base and end cover are set to form an installation cavity, and the end cover can be detachably connected to the base, making it more convenient to install a single set of reducer bearings.

[0010] Preferably, it also includes a loading shaft and a variable frequency motor. The loading shaft extends into the mounting cavity and is used for mounting the reducer bearing. The variable frequency motor is used to drive the loading shaft to rotate.

[0011] By adopting the above technical solution, the variable frequency motor drives the loading shaft to rotate, which can achieve high speed and speed change function, and can more comprehensively and reasonably test the operating condition and life parameters of the RV reducer bearing.

[0012] Preferably, the variable frequency motor includes a drive motor and a frequency converter. The drive motor is used to drive the loading shaft to rotate. The frequency converter is used to control the speed of the drive motor.

[0013] By adopting the above technical solution, the speed of the drive motor can be controlled by the frequency converter, achieving high speed and variable operating conditions, which can more comprehensively and reasonably test the operating conditions and life parameters of the RV reducer bearings.

[0014] Preferably, it also includes a transmission structure. The transmission structure is connected between the variable frequency motor and the loading shaft.

[0015] By adopting the above technical solution, power can be transmitted from the variable frequency motor to the loading shaft.

[0016] Preferably, the transmission structure includes a belt drive mechanism.

[0017] By adopting the above technical solution, overload protection is achieved by utilizing the characteristic that belt drive mechanisms will slip under overload.

[0018] Preferably, it also includes a loading axis and a loading structure. The loading shaft extends into the mounting cavity and is used for mounting the reducer bearing. The loading structure is used to apply a load to the loading shaft.

[0019] By adopting the above technical solution, the testing machine can directly apply load to a single bearing, eliminating interference between test specimens and more realistically and effectively simulating the direct loading of a single bearing.

[0020] Preferably, the loading structure includes a loading seat and a loading cylinder. The loading shaft is rotatably connected to the loading seat. The loading cylinder is used to apply a load to the loading seat; When there is no load, the piston rod of the loading cylinder is perpendicular to the loading axis.

[0021] By adopting the above technical solution, multi-directional composite load loading (bending moment + radial load) can be used to simulate real working conditions.

[0022] Preferably, the loading structure further includes a transmission bearing. The transmission bearing is connected between the loading shaft and the loading seat.

[0023] By adopting the above technical solution, the loading shaft and the loading seat are connected by a transmission bearing, so that the loading shaft can rotate smoothly on the loading seat, ensuring the stability of the loading process.

[0024] Preferably, the loading structure further includes a protective block. The protective block is connected between the loading cylinder and the loading seat; When the loading cylinder applies a load to the loading seat and the load is less than a set value, the protective block undergoes elastic deformation.

[0025] By adopting the above technical solution, the protective block is connected between the loading cylinder and the loading seat. When the loading cylinder applies a load to the loading seat and the load is less than the set value, the protective block undergoes elastic deformation, which can play a buffering and protective role, making the testing machine run more stably.

[0026] In summary, this application includes at least one of the following beneficial technical effects: 1. The mounting cavity of the testing machine can install a single set of reducer bearings, which can realistically simulate the direct load of a single set of bearings, and the installation is more convenient, solving the problems of inconvenient installation and inability to realistically simulate the load of a single set of bearings in the old equipment. 2. The variable frequency motor can drive the loading shaft to rotate, and the frequency converter can control the speed of the drive motor, enabling high-speed and variable-speed operation, which solves the problems of the original technology's single speed adjustment method and low speed. 3. The loading structure can apply load to the loading shaft, enabling direct loading of a single bearing, eliminating interference between test specimens, and solving the problem that the original technology could not directly load a single bearing; 4. Temperature and vibration sensors can detect the temperature of the mounting cavity and the vibration of the bearing housing, respectively. They can directly detect parameters such as temperature and vibration of a single bearing, solving the problem that the original measurement and control system could not confirm the vibration magnitude of each bearing and that there was mutual interference. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of an RV reducer bearing life testing machine.

[0028] Figure 2 This is a schematic diagram of the bearing housing.

[0029] Figure 3 This is a schematic diagram of the transmission structure.

[0030] Figure 4 This is a schematic diagram of the loading structure.

[0031] Explanation of reference numerals in the attached drawings: 1. Test bench; 2. Bearing housing; 21. Seat body; 22. End cover; 23. Through hole; 3. Temperature sensor; 4. Vibration sensor; 5. Loading shaft; 6. Transmission structure; 61. Belt drive mechanism; 62. Output shaft; 63. Coupling; 7. Variable frequency motor; 71. Drive motor; 8. Fixed seat; 9. Loading structure; 91. Loading seat; 92. Transmission bearing; 93. Loading cylinder; 94. Protective block. Detailed Implementation

[0032] The present application will be further described in detail below with reference to the accompanying drawings.

[0033] Reference Figure 1 This application discloses an RV reducer bearing life testing machine, including a test bench 1, a bearing housing 2, a temperature sensor 3, and a vibration sensor 4.

[0034] The bearing housing 2 is detachably and fixedly connected to the test bench 1. The bearing housing 2 has a mounting cavity for mounting a single reducer bearing. A temperature sensor 3 is connected to the bearing housing 2 to detect the temperature of the mounting cavity. A vibration sensor 4 is connected to the bearing housing 2 to detect the vibration of the bearing housing 2.

[0035] Reference Figure 1 and Figure 2 The bearing housing 2 includes a housing body 21 and an end cap 22. The housing body 21 is detachably and fixedly connected to the test bench 1, and the housing body 21 is provided with a mounting groove. The end cap 22 is detachably connected to the housing body 21; in the attached drawing, a bolt passes through the end cap 22 and is threaded onto the housing body 21. The end cap 22 covers the opening of the mounting groove, and the surface of the end cap 22 and the inner wall of the mounting groove together form the aforementioned mounting cavity.

[0036] Reference Figure 1 and Figure 3 An RV reducer bearing life testing machine also includes a loading shaft 5, a transmission structure 6, and a variable frequency motor 7.

[0037] The bearing housing 2 has a through hole 23, which passes through the housing body 21 and the end cover 22, and connects to the mounting cavity. One end of the loading shaft 5 passes through the through hole 23 and extends out. The section of the loading shaft 5 located in the mounting cavity is used for mounting the reducer bearing. The end of the loading shaft 5 that extends out after passing through the through hole 23 is used to connect to the transmission structure 6.

[0038] The transmission structure 6 includes a belt drive mechanism 61, an output shaft 62, and a coupling 63. The variable frequency motor 7 includes a drive motor 71 and a frequency converter.

[0039] The frequency converter is used to control the speed of the drive motor 71. The motor housing of the drive motor 71 is connected to the test bench 1, and the motor shaft of the drive motor 71 is connected to one pulley of the belt drive mechanism 61. One pulley of the belt drive mechanism 61 transmits power to the other pulley via a belt. The output shaft 62 is connected to the other pulley of the belt drive mechanism 61, and the coupling 63 connects the output shaft 62 and the loading shaft 5. The coupling 63 transmits the power from the output shaft 62 to the loading shaft 5.

[0040] In the attached diagram: a fixed base 8 is fixedly connected to the test bench 1, and the output shaft 62 is rotatably connected to the fixed base 8; one end of the output shaft 62 is connected to a small pulley, and the other end of the output shaft 62 is connected to a coupling 63.

[0041] Reference Figure 1 and Figure 4 An RV reducer bearing life testing machine also includes a loading structure 9. The loading structure 9 is used to apply a load to the loading shaft 5.

[0042] The loading structure 9 includes a loading seat 91, a transmission bearing 92, a loading cylinder 93, and a protective block 94.

[0043] The loading seat 91 is placed on the test bench 1, and the loading seat 91 can be displaced relative to the test bench 1. The loading shaft 5 is rotatably connected to the loading seat 91, and the transmission bearing 92 is connected between the loading shaft 5 and the loading seat 91. In the attached figure: the end of the loading shaft 5 away from the coupling 63 is rotatably connected to the loading seat 91 through the transmission bearing 92.

[0044] The loading cylinder 93 is used to apply load to the loading seat 91. The cylinder body of the loading cylinder 93 is connected to the test bench 1. Under no load, the piston rod of the loading cylinder 93 is perpendicular to the loading shaft 5.

[0045] The protective block 94 is connected between the loading cylinder 93 and the loading seat 91.

[0046] When the loading cylinder 93 applies a load to the loading seat 91, and the load is less than the set value, the protective block 94 undergoes elastic deformation. When the force exerted by the loading cylinder 93 on the protective block 94 is greater than the set value, the protective block 94 undergoes plastic deformation or breaks.

[0047] In the attached diagram: A pressing rod is connected to the end of the protective block 94 facing the loading seat 91. The end of the pressing rod facing the loading seat 91 is a ball head, which is used to press against the loading seat 91. More specifically: The protective block 94 has a threaded hole, and the pressing rod has threads on its outer circumference, meaning the pressing rod is threaded into the threaded hole of the protective block 94; a nut is also threaded onto the pressing rod, which is used to press against the protective block 94 to prevent loosening.

[0048] The implementation principle of the RV reducer bearing life testing machine according to this application embodiment is as follows: The single-bearing installation design avoids the problem of mutual interference between multiple bearings, and can realistically simulate the load conditions of a single bearing. The variable frequency motor 7 and transmission structure 6 enable the testing machine to operate at high speeds and variable speeds, expanding the testing range. The temperature sensor 3 and vibration sensor 4 can accurately detect the operating parameters of a single bearing, providing reliable data support for the test results. The loading structure 9 allows for direct loading of a single bearing, making the test more realistic. These improvements enhance the performance of the testing machine and the accuracy of the test results, meeting the industry's demand for enhanced life performance testing of RV reducer bearings.

[0049] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An RV reducer bearing life testing machine, characterized in that, It includes a bearing housing (2), a temperature sensor (3), and a vibration sensor (4). The bearing housing (2) is provided with a mounting cavity for mounting a single set of reducer bearings. The temperature sensor (3) is connected to the bearing housing (2) and is used to detect the temperature of the mounting cavity. The vibration sensor (4) is connected to the bearing housing (2) and is used to detect the vibration of the bearing housing (2).

2. The RV reducer bearing life testing machine according to claim 1, characterized in that, The bearing housing (2) includes a housing (21) and an end cap (22). The base (21) is provided with a mounting groove. The end cap (22) is detachably connected to the base (21), and the end cap (22) covers the opening of the mounting groove. The surface of the end cap (22) and the inner wall of the mounting groove together form the mounting cavity.

3. The RV reducer bearing life testing machine according to claim 1, characterized in that, It also includes a loading shaft (5) and a variable frequency motor (7). The loading shaft (5) extends into the mounting cavity, and the loading shaft (5) is used for mounting the reducer bearing. The variable frequency motor (7) is used to drive the loading shaft (5) to rotate.

4. The RV reducer bearing life testing machine according to claim 3, characterized in that, The variable frequency motor (7) includes a drive motor (71) and a frequency converter. The drive motor (71) is used to drive the loading shaft (5) to rotate. The frequency converter is used to control the speed of the drive motor (71).

5. The RV reducer bearing life testing machine according to claim 3, characterized in that, It also includes a transmission structure (6). The transmission structure (6) is connected between the variable frequency motor (7) and the loading shaft (5).

6. The RV reducer bearing life testing machine according to claim 5, characterized in that, The transmission structure (6) includes a belt drive mechanism (61).

7. The RV reducer bearing life testing machine according to claim 1, characterized in that, It also includes a loading axis (5) and a loading structure (9). The loading shaft (5) extends into the mounting cavity, and the loading shaft (5) is used for mounting the reducer bearing. The loading structure (9) is used to apply a load to the loading shaft (5).

8. The RV reducer bearing life testing machine according to claim 7, characterized in that, The loading structure (9) includes a loading seat (91) and a loading cylinder (93). The loading shaft (5) is rotatably connected to the loading seat (91). The loading cylinder (93) is used to apply a load to the loading seat (91); When there is no load, the piston rod of the loading cylinder (93) is perpendicular to the loading shaft (5).

9. The RV reducer bearing life testing machine according to claim 8, characterized in that, The loading structure (9) also includes a transmission bearing (92). The transmission bearing (92) is connected between the loading shaft (5) and the loading seat (91).

10. The RV reducer bearing life testing machine according to claim 8, characterized in that, The loading structure (9) also includes a protection block (94). The protective block (94) is connected between the loading cylinder (93) and the loading seat (91); When the loading cylinder (93) applies a load to the loading seat (91) and the load is less than the set value, the protective block (94) undergoes elastic deformation.

Images