Flexible bearing torque detection method

Abstract

The application discloses a flexible bearing torque detection method, comprising the following steps: assembling a detection device comprising a detection table base, a rotating shaft fixing module, a bearing fixing upper die, a bearing fixing lower die and a digital display torque instrument; an instrument support rod is arranged on the side edge of the detection table base, an instrument fixing support can be arranged on the support rod in a lifting mode, and the digital display torque instrument is fixed on the support in a lifting mode. The flexible thin-wall bearing is installed into the bearing fixing lower die and the installation state is confirmed, the bearing fixing upper die is matched, and the internal components of the rotating shaft fixing module are connected; the digital display torque instrument is fixed with the upper die in a descending mode; the internal components drive the bearing to rotate, the torque instrument value is read and re-measured, torque detection is completed; after trial detection, the bearing quality is checked and adjusted, and repeated operation is performed to complete detection. The application can accurately detect the torque of the flexible bearing, is suitable for bearings of different specifications, improves detection precision and product qualification rate, and guarantees the torque stability of products.

Description

Technical Field

[0001] This invention relates to the field of bearing testing technology, and more specifically to a method for testing the torque of flexible bearings. Background Technology

[0002] With the gradual localization of flexible thin-walled bearings, the requirements for their application in special fields, special occasions, and special functions are becoming increasingly stringent in high-end fields, the electronics and information industry, and key project development. During the production process, many flexible thin-walled bearings face various challenges related to product precision testing. Customers demand both dimensional accuracy for individual sets and torque accuracy after installation, aiming to reduce rotational energy loss and save energy. However, due to insufficient testing capabilities and equipment precision, the pass rate of assembled flexible thin-walled bearings is low, or the required torque is not met. Consequently, the functional precision stability of assembled flexible thin-walled bearings cannot be guaranteed, leading to excessive torque during the initial running-in process. Therefore, the design, fabrication, and use of torque testing devices for flexible thin-walled bearings have become particularly urgent and important.

[0003] Currently, there is a prior art device with publication number CN219589854U, DB, which discloses a torque testing device for paired angular contact ball bearings. This device uses a torque meter, a testing platform, and a testing groove to test the torque of the bearing. However, during the testing process of the above-mentioned device, the vertical position of the torque meter cannot be adjusted, making it unsuitable for testing bearings with various axial lengths. Summary of the Invention

[0004] To address the shortcomings of existing technologies, the present invention aims to provide a method for detecting the torque of flexible bearings, which can achieve accurate detection of the torque of flexible bearings and is adaptable to bearings with different axial lengths, thereby improving detection accuracy and product qualification rate.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a method for detecting the torque of a flexible bearing, comprising the following steps: Step 1: Assemble the flexible bearing torque testing device. This device includes a testing platform base, a rotating shaft fixing module, an upper bearing fixing mold and a lower bearing fixing mold, and a digital torque meter. The lower bearing fixing mold is installed on the rotating shaft fixing module, and the upper bearing fixing mold is installed above the lower bearing fixing mold. The bearing to be tested is placed between the upper and lower bearing fixing molds. An instrument support rod is provided on the side of the testing platform base, and an instrument fixing bracket is provided on the instrument support rod that can be raised and lowered. The digital torque meter is fixedly installed on the fixing bracket and moves up and down above the upper bearing fixing mold. Step 2: Install the flexible thin-walled bearing in the lower bearing fixing mold and confirm that the installation is flat and without interference. Then, fit the upper bearing fixing mold with the inner diameter of the flexible thin-walled bearing, and connect the upper bearing fixing mold with the internal components of the rotating shaft fixing module through blind holes, and confirm the fit. Step 3: Lower the digital torque meter to a suitable position, assemble the digital torque meter with the bearing fixing mold, and secure the digital torque meter. Step 4: After installation and debugging are completed, start the internal components of the rotating shaft fixing module to drive the flexible thin-walled bearing to rotate and read the digital torque meter readings. Repeat the measurement and confirmation multiple times to detect the torque of the flexible thin-walled bearing. Step 5: After the test is completed, disassemble the tested flexible thin-walled bearing and check whether there are any crushing, biting, or parallelism defects on the inner and outer ring end faces. Check whether there are any assembly slip marks on the inner diameter of the flexible thin-walled bearing and whether the dimensions meet the product quality requirements. Then make adjustments to meet the usage requirements. Step six: After the adjustment is completed, the operator repeats the work of steps two to four to complete the testing work of the flexible thin-walled bearing torque detection device.

[0006] As a further improvement of the present invention, a transmission gear rail extending along the length of the instrument support rod is fixed to the side of the instrument support rod. A base sleeve is fitted on the instrument support rod. One end of the instrument fixing bracket is fixed to the base sleeve. A rotating gear shaft is rotatably provided inside the base sleeve. The rotating gear shaft meshes with the transmission gear rail. One end of the rotating gear shaft passes through the base sleeve, and a rotating handle is coaxially fixed to that end. A mounting bolt is threaded onto the base sleeve. The mounting bolt abuts against the instrument support rod, thereby positioning the base sleeve on the instrument support rod. In step three, when operating the digital torque meter, the rotating handle is driven to rotate the rotating gear shaft, and the base sleeve is moved up and down by meshing with the transmission gear rail.

[0007] As a further improvement of the present invention, the lower end face of the rotating shaft fixing module is provided with a receiving cavity, in which a gear transmission module A and a gear transmission module B are provided. The gear transmission module A and the gear transmission module B constitute the internal components of the rotating shaft fixing module. The upper end of the gear transmission module B extends upward and enters the lower bearing fixing mold. The upper bearing fixing mold is connected to the shaft end of the gear transmission module B. The end of the gear transmission module A extends out from the side wall of the rotating shaft fixing module and a starter handle is coaxially sleeved on it. The gear transmission module A and the gear transmission module B mesh with each other through a helical gear structure.

[0008] As a further improvement of the present invention, the instrument mounting bracket is provided with a mounting hole, and the end of the instrument mounting bracket is provided with a torque meter fixing bolt. The digital torque meter is inserted into the mounting hole, and the torque meter fixing bolt is screwed into the mounting hole to abut against the digital torque meter, so as to fix the digital torque meter in the mounting hole.

[0009] As a further improvement of the present invention, a transmission module fixing platform is fixed on the top of the rotating shaft fixing module, and the bearing fixing lower mold is set on the transmission module fixing platform and is located at the center of the transmission module fixing platform.

[0010] As a further improvement of the present invention, in step two, when the flexible thin-walled bearing is installed in the lower bearing fixing mold, the inner wall of the through hole of the lower bearing fixing mold and the outer diameter of the flexible thin-walled bearing are in transition fit. The inner wall of the through hole of the lower bearing fixing mold is ground, and the surface roughness should be within 0.25μm. The vertical difference between the inner wall and the shoulder should be within 0.002mm. The upper bearing fixing mold is fitted with the inner diameter of the flexible thin-walled bearing, and the fit clearance is 0.005~0.01mm. The weight of the upper bearing fixing mold is set according to the bearing requirements, generally 49N and 98N.

[0011] The beneficial effects of this invention are as follows: By assembling a dedicated flexible bearing torque testing device and employing a method of fixing the bearing with upper and lower molds and using a liftable torque meter for testing, the torque of flexible thin-walled bearings can be accurately tested, effectively improving testing accuracy, ensuring product torque stability, and solving the problems of low finished product qualification rate and excessive running-in torque caused by insufficient accuracy of existing testing equipment. This meets the bearing torque accuracy requirements of high-end scenarios and reduces rotational energy loss. The liftable instrument mounting bracket structure can adapt to the testing of bearings with different axial lengths, expanding the applicability of the device; the gear-driven lifting structure and gear-driven drive structure are convenient to operate and provide stable transmission, further improving testing efficiency and accuracy; the high-precision upper and lower mold design ensures bearing installation accuracy, avoids assembly damage, and improves testing reliability. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the flexible bearing torque detection device of the present invention from one perspective. Figure 2 This is a schematic diagram of the flexible bearing torque detection device of the present invention from another perspective; Figure 3 This is a schematic diagram of the flexible bearing torque detection device of the present invention from another perspective. Detailed Implementation

[0013] The present invention will now be described in further detail with reference to the embodiments shown in the accompanying drawings.

[0014] Reference Figure 1 , Figure 2 and Figure 3 As shown, the flexible bearing torque detection method of this embodiment includes the following steps: Step 1: Assemble the flexible bearing torque testing device. The device includes a testing platform base 1, a rotating shaft fixing module 2, a bearing fixing upper mold 5, a bearing fixing lower mold 4, and a digital torque meter 19. The bearing fixing lower mold 4 is installed on the rotating shaft fixing module 2, and the bearing fixing upper mold 5 is installed above the bearing fixing lower mold 4. The bearing to be tested 20 is placed between the bearing fixing upper mold 5 and the bearing fixing lower mold 4. The side of the testing platform base 1 is provided with an instrument support rod 9, and an instrument fixing bracket 7 is provided on the instrument support rod 9 that can be raised and lowered. The digital torque meter 19 is fixedly installed on the instrument fixing bracket 7, and the instrument fixing bracket 7 moves up and down above the bearing fixing upper mold 5. Step 2: Install the flexible thin-walled bearing 20 in the lower bearing fixing mold 4 and confirm that the installation is flat and without interference. Then, fit the upper bearing fixing mold 5 with the inner diameter of the flexible thin-walled bearing 20, and connect the upper bearing fixing mold 5 with the internal components of the rotating shaft fixing module 2 through blind holes, and confirm the fit. Step 3: Lower the digital torque meter 19 to a suitable position, assemble the digital torque meter 19 with the bearing fixing upper mold 5, and fix the digital torque meter 19 in place. Step 4: After installation and debugging are completed, start the internal components of the rotating shaft fixing module 2 to drive the flexible thin-walled bearing 20 to rotate and read the digital torque meter 19. Repeat the test multiple times to confirm and thus detect the torque of the flexible thin-walled bearing. Step 5: After the test is completed, disassemble the tested flexible thin-walled bearing 20 and check whether there are any crushing, biting, or parallelism defects on the inner and outer ring end faces. Check whether there are any assembly slip marks on the inner diameter of the flexible thin-walled bearing 20 and whether the dimensions meet the product quality requirements. Then make adjustments to meet the usage requirements. Step six: After the adjustment is completed, the operator repeats the work of steps two to four to complete the testing work of the flexible thin-walled bearing torque detection device.

[0015] The above-mentioned testing method uses a dedicated testing device to position and fix the flexible thin-walled bearing 20, and works with a height-adjustable digital torque meter 19 to complete the torque test. The precise positioning of the upper bearing fixing mold 5 and the lower bearing fixing mold 4 ensures the coaxiality and stability of the bearing installation, avoids testing errors caused by offset during the testing process, effectively improves the accuracy of torque testing, and solves the problems of insufficient accuracy and high failure rate of finished product torque in existing testing equipment. At the same time, the height-adjustable instrument fixing bracket 7 can be adapted to bearings of different heights, solving the problems of non-adjustable position and narrow application range of existing testing instruments. After testing, an appearance and dimension inspection is added to promptly detect assembly damage of the flexible thin-walled bearing 20, ensure product quality, and ultimately improve the finished product qualification rate and ensure torque stability.

[0016] Furthermore, a transmission gear 8 extending along the length of the instrument support rod 9 is fixed to the side of the instrument support rod 9. A base sleeve 10 is fitted on the instrument support rod 9. One end of the instrument fixing bracket 7 is fixed on the base sleeve 10. A rotating gear shaft 16 is rotatably provided inside the base sleeve 10. The rotating gear shaft 16 meshes with the transmission gear 8. One end of the rotating gear shaft 16 extends out of the base sleeve 10, and a rotating handle 14 is coaxially fixed on that end. A meter holder fixing bolt 15 is threaded onto the base sleeve 10. The meter holder fixing bolt 15 abuts against the instrument support rod 9, thereby positioning the base sleeve 10 on the instrument support rod 9. When operating the digital torque meter 19 in step three, the rotating handle 14 is used to drive the rotating gear shaft 16 to rotate, thereby driving the base sleeve 10 to move up and down through the meshing of the rotating gear shaft 16 with the transmission gear 8.

[0017] The gear and rack lifting structure allows for precise adjustment of the height of the digital torque meter 19 by rotating the handle 14. The adjustment process is smooth and the positioning is accurate. It can adapt to the testing requirements of flexible thin-walled bearings 20 with different axial lengths. At the same time, it is easy to operate and does not require an additional power source, which improves the practicality and adjustment accuracy of the testing device. The mounting bolt 15 can lock the position of the mounting sleeve 10 after adjustment, preventing the digital torque meter 19 from shifting during the testing process and ensuring the stability of the testing.

[0018] Furthermore, the lower end face of the rotating shaft fixing module 2 is provided with a receiving cavity, in which a gear transmission module A17 and a gear transmission module B18 are provided. The gear transmission module A17 and the gear transmission module B18 constitute the internal components of the rotating shaft fixing module 2. The upper end of the gear transmission module B18 extends upward and enters the lower bearing fixing mold 4. The upper bearing fixing mold 5 is connected to the shaft end of the gear transmission module B18. The end of the gear transmission module A17 extends out from the side wall of the rotating shaft fixing module 2, and a starter handle 12 is coaxially sleeved on it. The gear transmission module A17 and the gear transmission module B18 mesh with each other through a helical gear structure.

[0019] The drive structure of this helical gear transmission can drive the inner ring of the flexible thin-walled bearing 20 to rotate through the start handle 12 on the side. The transmission is smooth and the speed is uniform, which can avoid torque detection errors caused by speed fluctuations and further improve the detection accuracy. At the same time, the gear transmission module A17 and gear transmission module B18 are built into the shaft fixing module 2, which is compact, saves device space, and can protect the transmission components, extending the service life of the device.

[0020] Furthermore, the instrument mounting bracket 7 has a mounting hole, and the end of the instrument mounting bracket 7 is provided with a torque meter fixing bolt 6. The digital torque meter 19 is inserted into the mounting hole, and the torque meter fixing bolt 6 is screwed into the mounting hole and abuts against the digital torque meter 19 to fix the digital torque meter 19 in the mounting hole.

[0021] The digital torque meter 19 is fixed by the torque meter fixing bolt 6, which is convenient for disassembly and assembly. Different specifications of digital torque meters 19 can be quickly replaced according to the testing needs, improving the adaptability of the device. At the same time, it is securely fixed to prevent the instrument from loosening during the testing process.

[0022] Furthermore, a transmission module fixing platform 3 is fixed on the top of the rotating shaft fixing module 2, and the bearing fixing lower mold 4 is set on the transmission module fixing platform 3 and located at the center of the transmission module fixing platform 3.

[0023] The transmission module fixing platform 3 can provide stable support for the bearing fixing lower mold 4. Setting the bearing fixing lower mold 4 at the center of the platform can ensure the coaxiality of the flexible thin-walled bearing 20 installation, avoid torque detection deviation caused by eccentricity, and improve the accuracy of the detection results.

[0024] Furthermore, in step two, when the flexible thin-walled bearing 20 is installed in the lower bearing fixing mold 4, the inner wall of the through hole of the lower bearing fixing mold 4 and the outer diameter of the flexible thin-walled bearing 20 are in transition fit. The inner wall of the through hole of the lower bearing fixing mold 4 needs to be ground, and the surface roughness should be within 0.25μm. The vertical difference between the inner wall and the shoulder should be within 0.002mm. The upper bearing fixing mold 5 is fitted with the inner diameter of the flexible thin-walled bearing 20, and the fit clearance is 0.005~0.01mm. The weight of the upper bearing fixing mold 5 is set according to the bearing requirements, generally 49N and 98N.

[0025] The high-precision upper bearing fixing mold 5 and lower bearing fixing mold 4 are designed to ensure the positioning accuracy of the flexible thin-walled bearing 20 during installation, avoiding misalignment and jamming during assembly. At the same time, it can reduce the slippage and pressure damage to the flexible thin-walled bearing 20 caused by assembly. The upper bearing fixing mold 5 of different weights can simulate different axial load conditions, meet the testing standards of different bearings, and improve the authenticity and reference value of the test results.

[0026] In summary, this solution employs a testing device comprising a testing platform base 1, a rotating shaft fixing module 2, a transmission module fixing platform 3, a height-adjustable instrument fixing bracket 7, and a digital torque meter 19. Through a testing process involving the positioning and fixing of the upper bearing fixing mold 5 and the lower bearing fixing mold 4, the rotation of the flexible thin-walled bearing 20 driven by the gear transmission module, and the data collection by the height-adjustable digital torque meter 19, accurate torque detection of the flexible thin-walled bearing 20 is achieved. This solution solves the problems of insufficient accuracy, non-adjustable instrument position, and low finished product torque qualification rate in existing testing equipment. It is adaptable to bearings of different specifications and axial lengths, improving testing efficiency and product qualification rate, ensuring the torque stability and assembly quality of flexible bearings, and meeting the testing needs of high-end application scenarios.

[0027] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A method for detecting the torque of a flexible bearing, characterized in that: The steps include the following: Step 1: Assemble the flexible bearing torque testing device. The device includes a testing platform base (1), a rotating shaft fixing module (2), a bearing fixing upper mold (5), a bearing fixing lower mold (4), and a digital torque meter (19). The bearing fixing lower mold (4) is installed on the rotating shaft fixing module (2), and the bearing fixing upper mold (5) is installed above the rotating shaft fixing lower mold (4). The bearing to be tested (20) is placed between the bearing fixing upper mold (5) and the bearing fixing lower mold (4). The side of the testing platform base (1) is provided with an instrument support rod (9). The instrument support rod (9) is provided with an instrument fixing bracket (7) that can be raised and lowered. The digital torque meter (19) is fixedly installed on the fixing bracket (7). As the fixing bracket (7) moves up and down above the bearing fixing upper mold (5), the instrument is fixedly installed on the fixing bracket (7). Step 2: Install the flexible thin-walled bearing (20) in the lower bearing fixing mold (4) and confirm that the installation is flat and without interference. Then, fit the upper bearing fixing mold (5) with the inner diameter of the flexible thin-walled bearing (20), and connect the upper bearing fixing mold (5) with the internal components of the rotating shaft fixing module (2) through blind holes, and confirm the fit. Step 3: Lower the digital torque meter (19) to a suitable position, and assemble the digital torque meter (19) with the bearing fixing upper mold (5), and fix the digital torque meter (19). Step 4: After installation and debugging, start the internal components of the rotating shaft fixing module (2) to drive the flexible thin-walled bearing (20) to rotate and read the digital torque meter (19) and retest and confirm multiple times to detect the torque of the flexible thin-walled bearing; Step 5: After the test is completed, disassemble the tested flexible thin-walled bearing (20) and check whether there are any pressure marks, bite marks and parallelism defects on the inner and outer ring end faces. Check whether there are any assembly slip marks on the inner diameter of the flexible thin-walled bearing (20) and whether the dimensions meet the product quality requirements. Then adjust it to meet the usage requirements. Step six: After the adjustment is completed, the operator repeats the work of steps two to four to complete the testing work of the flexible thin-walled bearing torque detection device.

2. The method for detecting the torque of a flexible bearing according to claim 1, characterized in that: A transmission gear (8) extending along the length of the instrument support rod (9) is fixed to the side of the instrument support rod (9). A meter base sleeve (10) is fitted on the instrument support rod (9). One end of the instrument fixing bracket (7) is fixed on the meter base sleeve (10). A rotating gear shaft (16) is rotatably provided inside the meter base sleeve (10). The rotating gear shaft (16) meshes with the transmission gear (8). One end of the rotating gear shaft (16) passes through the meter base sleeve (10) and is coaxially fixed at that end. There is a rotating handle (14), and the base sleeve (10) is threaded with a mounting bolt (15). The mounting bolt (15) abuts against the instrument support rod (9), thereby positioning the base sleeve (10) on the instrument support rod (9). In step three, when operating the digital torque meter (19), the rotating handle (14) is driven to rotate the rotating gear shaft (16), and the rotating gear shaft (16) meshes with the transmission gear rail (8) to drive the base sleeve (10) to move up and down.

3. The method for detecting the torque of a flexible bearing according to claim 2, characterized in that: The lower end face of the rotating shaft fixing module (2) is provided with a receiving cavity, in which a gear transmission module A (17) and a gear transmission module B (18) are provided. The gear transmission module A (17) and the gear transmission module B (18) constitute the internal components of the rotating shaft fixing module (2). The upper end of the gear transmission module B (18) extends upward and enters the lower bearing fixing mold (4). The upper bearing fixing mold (5) is connected to the shaft end of the gear transmission module B (18). The end of the gear transmission module A (17) extends out from the side wall of the rotating shaft fixing module (2) and a starter handle (12) is coaxially sleeved on it. The gear transmission module A (17) and the gear transmission module B (18) mesh with each other through a helical gear structure.

4. The method for detecting the torque of a flexible bearing according to claim 3, characterized in that: The instrument mounting bracket (7) has an installation hole, and the end of the instrument mounting bracket (7) is provided with a torque meter fixing bolt (6). The digital torque meter (19) is inserted into the installation hole, and the torque meter fixing bolt (6) is screwed into the installation hole and abuts against the digital torque meter (19) to fix the digital torque meter (19) in the installation hole.

5. The method for detecting the torque of a flexible bearing according to claim 4, characterized in that: The shaft fixing module (2) is fixed with a transmission module fixing platform (3), and the bearing fixing lower mold (4) is set on the transmission module fixing platform (3) and is located at the center of the transmission module fixing platform (3).

6. The method for detecting the torque of a flexible bearing according to claim 5, characterized in that: In step two, when the flexible thin-walled bearing (20) is installed in the bearing fixing lower mold (4), the inner wall of the through hole of the bearing fixing lower mold (4) and the outer diameter of the flexible thin-walled bearing (20) are in transition fit. The inner wall of the through hole of the bearing fixing lower mold (4) needs to be ground, and the surface roughness should be within 0.25μm. The vertical difference between the inner wall and the shoulder should be within 0.002mm. The bearing fixing upper mold (5) is matched with the inner diameter of the flexible thin-walled bearing (20), and the fit clearance is 0.005~0.01mm. The weight of the bearing fixing upper mold (5) is set according to the bearing requirements, generally 49N and 98N.

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