Bearing testing device

Abstract

The utility model discloses a bearing testing device which comprises a base, a bearing sleeve, a square tube, a torque measuring assembly, a loading assembly and a driving assembly. The bearing sleeve is arranged on the base and is used for accommodating a bearing to be tested; the square tube is rotatably arranged on the base and is configured to be inserted into a to-be-tested bearing of the bearing sleeve; the torque measuring assembly is connected with one end of the square tube and is used for measuring the torque of the square tube; the loading assembly is connected with the bearing sleeve and is used for applying a vertically downward load to the to-be-tested bearing; the driving assembly is connected with the square pipe so as to drive the square pipe to rotate. The bearing testing device is simple in structure, and the testing cost can be reduced while the testing precision is ensured.

Description

Technical Field

[0001] This utility model belongs to the field of testing equipment technology, specifically relating to a bearing testing device. Background Technology

[0002] In the fields of industrial equipment and precision machinery manufacturing, the accurate determination of the maximum static friction coefficient and sliding friction coefficient of bearings plays a crucial role in product performance evaluation and life prediction. Traditional testing methods generally use pneumatic or electric drive mechanisms as power sources, driving the bearing rotation through actuators such as hydraulic cylinders and servo motors. The introduction of power systems such as hydraulic cylinders and servo motors reduces equipment integration, and the configuration of pneumatic pipelines or servo circuits significantly increases equipment purchase and maintenance costs. Due to the inherent characteristics of rigid drives, existing testing devices have an inherent deviation of 0.5°-2° in angular accuracy control, making it difficult to meet the micro-motion characteristic testing requirements of high-precision bearings. In addition, the introduction of power systems such as hydraulic cylinders and servo motors often requires the use of specialized programmable control systems during the testing process, resulting in longer equipment debugging cycles.

[0003] The information disclosed in this background section is intended only to enhance the understanding of the overall background of this utility model and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content

[0004] The purpose of this invention is to provide a bearing testing device with a simple structure that can reduce testing costs while ensuring testing accuracy.

[0005] To achieve the above objectives, a specific embodiment of this utility model provides the following technical solution: A bearing testing device, comprising: a base, a bearing sleeve, a square tube, a torque measuring component, a loading component, and a driving component. The bearing sleeve is disposed on the base for accommodating the bearing to be tested; the square tube is rotatably disposed on the base and configured to be inserted into the bearing to be tested within the bearing sleeve; the torque measuring component is connected to one end of the square tube for measuring the torque of the square tube; the loading component is connected to the bearing sleeve for applying a vertically downward load to the bearing to be tested; the driving component is connected to the square tube to drive the square tube to rotate.

[0006] In one or more embodiments of this utility model, a circular hollow portion is provided on the bearing sleeve, and the bearing to be tested is interference-fitted into the circular hollow portion and fixed relative to the bearing sleeve.

[0007] In one or more embodiments of this utility model, multiple bearing sleeves are provided.

[0008] In one or more embodiments of this utility model, the load fixing frame is connected to a bearing sleeve disposed in the middle of the square tube.

[0009] In one or more embodiments of this utility model, the loading assembly includes a load fixing frame and a plurality of load blocks. The load fixing frame is connected to the bearing sleeve and located below the square tube; the plurality of load blocks are placed inside the load fixing frame to apply load to the bearing under test.

[0010] In one or more embodiments of this utility model, a connecting rod extending in the width direction is provided at the center of the top of the load fixing frame, and the bottom end of the bearing sleeve is connected to the midpoint of the connecting rod so that the load fixing frame remains horizontal.

[0011] In one or more embodiments of this utility model, the driving assembly includes a connecting frame, a transmission shaft, and a driving member. A rectangular cutout is provided on one side of the connecting frame, and the other end of the square tube is inserted into the rectangular cutout. The transmission shaft is connected to the other side of the connecting frame and extends along the axial direction of the square tube. The driving member is connected to the transmission shaft to drive the transmission shaft to rotate.

[0012] In one or more embodiments of this utility model, the driving element is selected from a push rod or a six-axis robotic arm.

[0013] In one or more embodiments of this utility model, the torque measuring assembly includes a torque sensor and a display device. The torque sensor is sleeved on the drive shaft to measure the torque value of the bearing under test; the display device is connected to the torque sensor to display the torque value.

[0014] In one or more embodiments of this utility model, the square tube is provided with an angle gauge to control the rotation angle of the bearing to be tested.

[0015] Compared with existing technologies, the bearing testing device of this invention drives the bearing to rotate manually or with a robotic arm, allowing for precise adjustment of the bearing rotation angle to ensure testing accuracy. Multiple bearing sleeves ensure relatively uniform force distribution on the bearing under test, reducing testing errors. The torque measurement component and loading component allow for adjustment of testing conditions to adapt to different testing requirements, increasing the versatility of the testing device. Furthermore, this bearing testing device has a simple structure, is easier to assemble and debug, offers greater flexibility, and is less costly. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art 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 without creative effort.

[0017] Figure 1 This is a first perspective view of the bearing testing device in one embodiment of the present invention;

[0018] Figure 2 This is a second perspective view of the bearing testing device in one embodiment of the present invention.

[0019] Explanation of key figure labels:

[0020] 1-Base, 2-Bearing sleeve, 3-Square tube, 4-Torque measuring assembly, 41-Torque sensor, 42-Display device, 5-Loading assembly, 51-Load fixing frame, 511-Connecting rod, 52-Load block, 6-Drive assembly, 61-Connecting frame, 62-Drive shaft, 63-Drive component, A-Bearing. Detailed Implementation

[0021] To enable those skilled in the art to better understand the technical solutions of this utility model, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0022] like Figure 1-2 As shown, a bearing testing device according to one embodiment of the present invention includes a base 1, a bearing sleeve 2, a square tube 3, a torque measuring component 4, a loading component 5, and a driving component 6. The bearing sleeve 2 is disposed on the base 1 and is used to house the bearing A to be tested. The square tube 3 is rotatably disposed on the base 1 and configured to be inserted into the bearing A to be tested within the bearing sleeve 2. The torque measuring component 4 is connected to one end of the square tube 3 and is used to measure the torque of the square tube 3. The loading component 5 is connected to the bearing sleeve 2 and is used to apply a vertically downward load to the bearing A to be tested. The driving component 6 is connected to the square tube 3 to drive the square tube 3 to rotate.

[0023] The working principle of this bearing testing device is as follows: When the square tube 3 is inserted into the bearing A to be tested, the outer ring of bearing A is fixed relative to the bearing sleeve 2, while the inner ring rotates relative to the outer ring under the drive of the square tube 3. The square tube 3 is driven by the drive assembly 6 to rotate bearing A, allowing for a 0-60° rotation test within the bearing sleeve 2. The bearing sleeve 2 is connected to a loading assembly 5. Based on the vertically downward load applied to bearing A by the loading assembly 5, the vertically downward force on bearing A is determined. The torque measurement assembly 4 is used to monitor the torque change of bearing A in real time. The maximum static friction coefficient and sliding friction coefficient of bearing A are calculated using the torque and vertically downward load experienced by bearing A during rotation. Specifically, the maximum static friction coefficient can be measured at the instant of relative rotation between the inner and outer rings of bearing A. The sliding friction coefficient can be measured when the inner ring of bearing A rotates stably relative to the outer ring.

[0024] In the above embodiments, the bearing testing device has a simple structure and can reduce testing costs while ensuring testing accuracy.

[0025] In one embodiment, the bearing sleeve 2 has a circular cutout, and the bearing A to be tested is interference-fitted into the circular cutout and fixed relative to the bearing sleeve 2. By creating the cutout, the bearing A to be tested can be housed inside the bearing sleeve 2 for mounting on the base 1.

[0026] Since testing only one bearing A at a time may lead to deviations in test results due to uneven force distribution, this utility model uses a square tube 3 to simultaneously mount multiple bearing sleeves 2 and transfers the load to two bearings A to be tested through the square tube 3. This allows for the simultaneous collection of data from multiple bearings A, thereby reducing test errors. Figure 1 The diagram shows two bearing sleeves 2, each housing the same bearing A. During testing, the bearing sleeve 2 is fixed or moves very little relative to the base, while the inner ring of bearing A rotates relative to its outer ring. This ensures that when the bearing sleeve 2 is connected to the loading assembly 5, the load on the bearing sleeve 2 is always vertically downward. Specifically, one bearing sleeve 2 is located at one end of the square tube 3, and the other bearing sleeve 2 is located in the middle of the square tube 3. The other end of the square tube 3 is used to connect to the drive assembly 6, etc., thus creating a uniformly distributed stress point arrangement on the square tube 3, ensuring that the test conditions for the two bearings A are relatively consistent.

[0027] The loading assembly 5 includes a load fixing frame 51 and multiple load blocks 52. The load fixing frame 51 is connected to one of the two bearing sleeves 2 and is located below the square tube 3. To ensure relatively uniform force distribution on the multiple bearings A, the loading assembly 5 is connected to the bearing sleeve 2 located in the middle of the square tube 3. Multiple load blocks 52 are placed inside the load fixing frame 51 to apply load to the bearing A under test. By adjusting the number of load blocks 52 placed inside the load fixing frame 51, the load value on the bearing A under test can be changed to adapt to different test requirements.

[0028] To ensure that the force applied by the loading assembly 5 to bearing A is always vertical, the load blocks 52 are evenly distributed within the load fixing frame 51, so that the center of gravity of the entire loading assembly 5 is located below bearing A. Specifically, a connecting rod 511 extending along the width direction is provided at the center of the top of the load fixing frame 51, and the bottom end of the bearing sleeve 2 is connected to the midpoint of the connecting rod 511, so that the load fixing frame 51 remains horizontal, and thus even under no-load conditions, the center of gravity of the load fixing frame 51 is located below bearing A. Furthermore, when the load blocks 52 are placed inside the load fixing frame 51, the load blocks 52 can be symmetrically placed within the load fixing frame 51 with the connecting rod 511 as the axis of symmetry.

[0029] In one embodiment, the drive assembly 6 includes a connecting frame 61, a drive shaft 62, and a drive member 63. A rectangular cutout is provided on one side of the connecting frame 61, and the other end of the square tube 3 is inserted into the rectangular cutout. The rectangular cutout and the square tube 3 cooperate to prevent the square tube 3 from rotating relative to the connecting frame 61, thereby ensuring that the torque of the bearing A can be effectively transmitted to the torque measuring assembly 4 through the square tube 3. The drive shaft 62 is connected to the other side of the connecting frame 61 and extends along the axial direction of the square tube 3. The drive member 63 is connected to the drive shaft 62 to drive the drive shaft 62 to rotate.

[0030] The drive component 63 is selected from a push rod or a six-axis robotic arm. For example... Figure 1 As shown, the driving component 63 is a thrust rod. In the prior art, the rotation of bearing A usually requires other power sources such as cylinders or electric cylinders. This bearing testing device can use a hand-pushed thrust rod or a robotic arm to drive the square tube 3 to rotate to complete the test, which is simpler in structure and more accurate.

[0031] In one embodiment, the torque measurement assembly 4 includes a torque sensor 41 and a display device 42. The torque sensor 41 is mounted on the drive shaft 62. When the inner ring of bearing A rotates relative to the outer ring of bearing A, a corresponding torque is generated, which is transmitted to the drive shaft 62 through the square tube 3 and detected by the torque sensor 41, thereby measuring the torque value of the bearing A under test. The square tube 3 is provided with an angle gauge to control the rotation angle of the bearing A under test. The display device 42 is connected to the torque sensor 41 to display the torque value.

[0032] In one embodiment, the square tube 3 is provided with an angle gauge, which can cooperate with the drive assembly 6 to more accurately control the rotation angle of the bearing A under test.

[0033] In summary, this bearing testing device allows for precise adjustment of the bearing A's rotation angle by manually or via a robotic arm, ensuring testing accuracy. Multiple bearing sleeves 2 ensure relatively uniform force distribution on the tested bearing A, reducing testing errors. The torque measurement component 4 and loading component 5 allow for adjustable testing conditions to adapt to different testing requirements, enhancing the versatility of the testing device. Furthermore, this bearing testing device features a simple structure, easier assembly and debugging, greater flexibility, and lower cost.

[0034] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0035] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A bearing testing device, characterized in that, include: Base; A bearing sleeve, disposed on the base, is used to accommodate the bearing to be tested; A square tube is rotatably mounted on the base and configured to be inserted into the bearing to be tested in the bearing sleeve; A torque measuring component is connected to one end of the square tube and is used to measure the torque of the square tube; A loading component, connected to the bearing sleeve, is used to apply a vertically downward load to the bearing under test; and A drive component is connected to the square tube to drive the square tube to rotate.

2. The bearing testing device according to claim 1, characterized in that, The bearing sleeve has a circular hollow section, and the bearing to be tested is interference-fitted into the circular hollow section and fixed relative to the bearing sleeve.

3. The bearing testing device according to claim 1, characterized in that, Multiple bearing sleeves are provided.

4. The bearing testing device according to claim 1, characterized in that, The loading component includes: A load-fixing frame, connected to the bearing sleeve and located below the square tube; and Multiple load blocks are placed within the load fixing frame to apply load to the bearing under test.

5. The bearing testing device according to claim 4, characterized in that, A connecting rod extending along the width direction is provided at the center of the top of the load fixing frame, and the bottom end of the bearing sleeve is connected to the midpoint of the connecting rod so that the load fixing frame remains horizontal.

6. The bearing testing device according to claim 4, characterized in that, The load fixing frame is connected to a bearing sleeve located in the middle of the square tube.

7. The bearing testing device according to claim 1, characterized in that, The driving component includes: The connecting frame has a rectangular cutout on one side, and the other end of the square tube is inserted into the rectangular cutout. A drive shaft, connected to the other side of the connecting frame and extending axially along the square tube; and A drive component is connected to the drive shaft to drive the drive shaft to rotate.

8. The bearing testing device according to claim 7, characterized in that, The drive component is selected from a push rod or a six-axis robotic arm.

9. The bearing testing device according to claim 7, characterized in that, The torque measurement component includes: A torque sensor, fitted onto the drive shaft, is used to measure the torque value of the bearing under test; and A display device is connected to the torque sensor to display the torque value.

10. The bearing testing device according to claim 1, characterized in that, The square tube is equipped with an angle gauge to control the rotation angle of the bearing under test.

Images