A bearing test fixture

Abstract

The application belongs to the technical field of photovoltaic support, and discloses a bearing test tool, which comprises a support frame, a jack and a bearing device, the jack and the bearing device are arranged in the support frame, the first force applying end of the jack is in abutment with the bearing device, the second force applying end of the jack acts on the support frame, the bearing device is used for placing a bearing to be tested and transmitting the force applied by the jack to the bearing to be tested; compared with a conventional test tool using external counterweight loading, the weight and volume of the tool are greatly reduced, so that a smaller temperature and humidity control box can be used, the demand for large and expensive test equipment is reduced, and the test cost is significantly reduced.

Description

Technical Field

[0001] This application relates to the field of photovoltaic support technology, and more specifically, to a bearing testing fixture. Background Technology

[0002] In the field of photovoltaic power generation, photovoltaic tracking brackets use the rotation of the main shaft to drive the photovoltaic modules to adjust their angle and obtain more solar radiation energy. The bearings on the outside of the main shaft play a key role in the photovoltaic bracket. Since photovoltaic brackets are often set up in areas with large temperature differences or humidity changes between day and night, such as deserts, Gobi, and polar regions, it is necessary to test the bearings to ensure that they can meet the needs of the project site.

[0003] However, most existing bearing testing fixtures employ a four-bearing plate pressurization method, applying pressure by placing a plate on the bearing under test and then placing counterweights or weights. This method has many drawbacks: the testing fixture is large and heavy, requiring large-scale testing equipment, resulting in high testing costs. Moreover, the applied weights or counterweights are heavy and may damage the testing equipment during operation, limiting the widespread adoption and implementation of this test. Therefore, there is an urgent need for a lighter, more efficient, and economical testing fixture.

[0004] Therefore, this application proposes a bearing testing fixture to solve the aforementioned problems. Utility Model Content

[0005] To address the aforementioned problems, this application provides a bearing testing fixture.

[0006] The bearing testing fixture provided in this application adopts the following technical solution:

[0007] A bearing testing fixture includes a support frame, a jack, and a bearing device. The support frame has a receiving space, and the jack and the bearing device are disposed within the receiving space. A first force-applying end of the jack abuts against the bearing device, and a second force-applying end of the jack acts on the support frame. The bearing device is used to place the bearing to be tested and to transmit the force applied by the jack to the bearing to be tested.

[0008] Furthermore, the support frame includes an upper support beam, a lower support beam disposed opposite to the upper support beam, and a connecting beam vertically connecting the upper support beam and the lower support beam, and the bearing device is disposed on the lower support beam.

[0009] With the above technical solution, the bearing device is located on the lower support beam, so that the stress point of the bearing under test corresponds directly to the support point of the support frame. This reduces the offset during the force transmission process, lowers the risk of deformation of the support frame due to uneven stress, and significantly improves the structural stability of the testing process.

[0010] Furthermore, the bearing testing fixture also includes a pressure sensor, which is located between the second force-applying end of the jack and the upper support beam.

[0011] The above technical solutions enable more precise control of bearing test force values, facilitate the recording of bearing performance data under different force values, provide reliable quantitative basis for subsequent analysis, and also promptly avoid damage to bearings or tooling caused by overload.

[0012] Furthermore, the bearing device includes a main shaft and a bearing housing, the bearing housing is disposed on the lower support beam and is used to accommodate the bearing to be tested, the main shaft is used to pass through the bearing to be tested, and the first force-applying end of the jack abuts against the main shaft.

[0013] Through the above technical solution, the spindle, as the intermediate component for force transmission, can evenly distribute the force of the jack to the bearing, avoiding excessive local stress; the bearing housing provides a stable installation position for the bearing, preventing the bearing from shifting during the test and ensuring that the test data can accurately reflect the actual load-bearing performance of the bearing.

[0014] Furthermore, there are two bearing seats, which are arranged sequentially along the length of the main shaft, and the first force-applying end of the jack is located between the two bearing seats.

[0015] With the above technical solution, the jack applies force between the two bearing seats, which can evenly transmit the force through the bearings on both sides of the main shaft, ensuring that the two bearings are under similar stress conditions. This facilitates the comparative analysis of the performance differences of different bearings, and is especially suitable for batch testing or quality screening of bearings in the same batch.

[0016] Furthermore, the two bearing housings are arranged symmetrically with respect to the center of the main shaft.

[0017] Through the above technical solution, this symmetrical structure can minimize the test deviation caused by uneven force, making the test data of the two bearings more comparable and valuable for reference, and improving the scientific nature of the test results.

[0018] Furthermore, the jack is a mechanical jack.

[0019] The above technical solution uses a mechanical jack as the force-applying component, which does not rely on an electric or hydraulic system. The operation is stable and reliable, and the force output is uniform and highly controllable. The mechanical structure is easy to maintain, is not easily affected by ambient temperature and humidity, and is suitable for complex testing environments such as deserts and Gobi. At the same time, its manufacturing cost is low, which can reduce the overall investment in tooling and facilitate its promotion and use in small and medium-sized laboratories.

[0020] Furthermore, the connecting beam is fixedly connected to the upper support beam and the lower support beam by welding, riveting or bolting.

[0021] The above technical solutions allow for the selection of appropriate connection methods based on the tooling's usage scenario and strength requirements: welding and riveting provide extremely high structural strength, suitable for long-term fixed use; bolted connections facilitate disassembly and adjustment, allowing for flexible replacement of components or adjustment of support frame dimensions. This diverse range of connection methods balances structural stability and operational flexibility, extending the tooling's service life.

[0022] Furthermore, the upper support beam, the lower support beam, and the connecting beam are C-shaped steel, H-shaped steel, or I-beams.

[0023] Through the above technical solutions, these profiles have the characteristics of high strength and high rigidity, which can effectively resist external force deformation during the testing process and ensure the structural stability of the support frame; in addition, this type of profile has a moderate weight, which can reduce the overall weight of the tooling while ensuring strength, making it easy to handle and install. Moreover, the material is widely available and the procurement cost is low, which helps to control the manufacturing cost of the tooling.

[0024] Furthermore, the bearing housing includes an annular portion and a base integrally formed with the annular portion. The annular portion is used to accommodate the bearing to be tested, and the base is disposed on the lower support beam.

[0025] Through the above technical solution, the annular part of the bearing housing can accurately accommodate the bearing under test, ensuring the concentricity and installation accuracy of the bearing and avoiding uneven force due to positioning deviation; the integrated base provides stable support and a fixed foundation for the bearing housing, which is convenient to connect with the lower support beam; this structural design reduces the weight of the bearing housing while taking into account the support stability and installation convenience, which can effectively improve the positioning accuracy of the bearing under test and ensure the reliability of the testing process.

[0026] In summary, this application includes at least one of the following beneficial technical effects:

[0027] (1) The tooling uses a jack as a loading device. Compared with the traditional test tooling that uses external counterweight for loading, the weight and volume of the tooling are greatly reduced, which makes it possible to use a smaller temperature and humidity control box, reducing the need for large and expensive test equipment, thereby significantly reducing test costs, improving the economic efficiency of testing, and enabling more laboratories, especially small laboratories, to carry out relevant tests.

[0028] (2) By accurately measuring the pressure applied by the jack through the pressure sensor, and with the reasonable connection between the bearing housing and the lower support beam and the design of the main shaft and the bearing under test being closely fitted, the pressure during the test can be accurately controlled and measured, ensuring that the bearing under test is tested in a stable state, effectively avoiding test errors caused by unstable tooling structure or inaccurate pressure measurement, improving the accuracy and reliability of test results, and providing more reliable data for evaluating bearing performance. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of this application;

[0030] Figure 2 This is a three-dimensional structural diagram of the present application;

[0031] Figure 3 This is a schematic diagram of the bearing housing.

[0032] The numbers in the diagram are explained as follows: 1. Support frame; 11. Upper support beam; 12. Connecting beam; 13. Lower support beam; 2. Jack; 3. Bearing seat; 4. Main shaft; 5. Bearing to be tested; 6. Pressure sensor. Detailed Implementation

[0033] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0034] In the description of this application, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0035] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0036] Example:

[0037] The following is in conjunction with the appendix Figure 1 -3 provides further detailed description of this application.

[0038] This application discloses a bearing testing fixture, including a support frame 1, a jack 2, and a bearing device. The support frame 1 includes a receiving space, and the jack 2 and the bearing device are disposed in the receiving space of the support frame 1. The jack 2 is used to apply a bearing force to the bearing 5 to be tested, and the bearing device is used to set the bearing 5 to be tested, providing a stable support foundation for the bearing 5 to be tested.

[0039] See Figures 1 to 3 In this embodiment, the support frame 1 has a U-shaped structure, including an upper support beam 11, two symmetrically arranged connecting beams 12, and a lower support beam 13 opposite to the upper support beam 11 from top to bottom. The two ends of the connecting beam 12 are vertically connected to the upper support beam 11 and the lower support beam 13, respectively. The upper support beam 11, the lower support beam 13, and the two connecting beams 12 together enclose a space for placing the bearing device, which is located on the lower support beam 13. The bearing device is located on the lower support beam 13 so that the stress point of the bearing 5 under test corresponds directly to the support point of the support frame 1, reducing the offset during the force transmission process, reducing the risk of deformation of the support frame 1 due to uneven stress, and significantly improving the structural stability of the testing process.

[0040] Please continue to refer to this. Figures 1 to 3 As shown, the bearing device includes a main shaft 4 and a bearing housing 3. The bearing housing 3 is mounted on the lower support beam 13 and is used to accommodate the bearing 5 to be tested. The main shaft 4 passes through the bearing 5 to be tested, and the bearing 5 to be tested is located inside the bearing housing 3. The outer surface of the bearing 5 to be tested is in contact with the inner surface of the bearing housing 3. The main shaft 4 passes through the bearing 5 to be tested, thereby realizing the setting of the bearing 5 to be tested in the support frame 1. At the same time, the load applied by the jack 2 is transmitted to the bearing 5 to be tested through the main shaft 4.

[0041] The jack 2 includes a first force-applying end and a second force-applying end, located at opposite ends of the jack 2. The first force-applying end of the jack 2 is positioned on the upper surface of the main shaft 4, transmitting the load applied by the jack 2 to the bearing 5 under test via the main shaft 4. The second force-applying end of the jack 2 abuts against the upper support beam 11. Preferably, the jack 2 is a mechanical jack, applying a downward force to the main shaft 4 and an upward force to the upper support beam 11 simultaneously. These two forces are equal in magnitude and opposite in direction. The main shaft 4, as an intermediate component for force transmission, evenly distributes the force applied by the jack 2 to the bearing, preventing excessive local stress. The bearing housing 3 provides stable mounting and positioning for the bearing, preventing displacement of the bearing 5 under test during testing and ensuring that the test data accurately reflects the actual load-bearing capacity of the bearing.

[0042] See Figure 1 and Figure 2 It also includes a pressure sensor 6, which is located between the second force-applying end of the jack 2 and the upper support beam 11; this makes the force value control of the bearing test more precise, facilitates the recording of bearing performance data under different force values, provides a reliable quantitative basis for subsequent analysis, and can also prevent damage to the bearing or tooling caused by overload in a timely manner.

[0043] In this embodiment, there are two bearings 5 ​​to be tested, and correspondingly two bearing seats 3. The two bearing seats 3 are arranged sequentially along the length of the main shaft 4, and the first force-applying end of the jack 2 is located between the two bearing seats 3. The jack 2 applies force between the two bearing seats 3, which can evenly transmit the force to the bearings on both sides through the main shaft 4, ensuring that the two bearings are under similar stress conditions. This facilitates the comparative analysis of performance differences between different bearings, and is especially suitable for batch testing or quality screening of bearings in the same batch. In a preferred embodiment, the two bearing seats 3 are arranged symmetrically with respect to the center of the main shaft 4. This symmetrical structure can minimize the test deviation caused by uneven force, making the test data of the two bearings more comparable and valuable, and improving the scientific nature of the test results.

[0044] The jack 2 is positioned above the middle of the main shaft 4 and between adjacent bearing seats 3, thereby ensuring that the two bearings 5 ​​under test bear equal loads.

[0045] See Figure 1 and Figure 2 Jack 2 is a mechanical jack; using a mechanical jack as the force-applying component, it does not rely on an electric or hydraulic system, the operation process is stable and reliable, the force output is uniform and highly controllable; the mechanical structure is simple to maintain, not easily affected by ambient temperature and humidity, and adaptable to complex testing environments such as deserts and Gobi. At the same time, its manufacturing cost is low, which can reduce the overall investment in tooling and facilitate its promotion and use in small and medium-sized laboratories.

[0046] See Figure 1 and Figure 2 The connecting beam 12 is fixedly connected to the upper support beam 11 and the lower support beam 13 by welding, riveting, or bolting. The appropriate connection method is selected based on the tooling's usage scenario and strength requirements: welding and riveting provide extremely high structural strength, suitable for long-term fixed use; bolted connections facilitate disassembly and adjustment, allowing for flexible replacement of components or adjustment of the support frame 1's dimensions. This diverse connection method balances structural stability and operational flexibility, extending the tooling's service life.

[0047] See Figure 1 and Figure 2 The upper support beam 11, the lower support beam 13, and the connecting beam 12 are made of C-shaped steel, H-shaped steel, or I-shaped steel. These profiles have the characteristics of high strength and high rigidity, which can effectively resist external force deformation during the testing process and ensure the structural stability of the support frame 1. Moreover, this type of profile has a moderate weight, which can reduce the overall weight of the tooling while ensuring strength, making it easy to handle and install. In addition, the materials are widely available and the procurement cost is low, which helps to control the manufacturing cost of the tooling.

[0048] See Figure 1 , Figure 2 and Figure 3 The bearing housing 3 includes an annular portion for supporting the bearing 5 under test and the spindle 4, and a base integrally formed with the annular portion. The annular portion is used to accommodate the bearing 5 under test, and the base is located on the lower support beam 13. The annular portion of the bearing housing 3 can accurately accommodate the bearing 5 under test, ensuring the concentricity and installation accuracy of the bearing and avoiding uneven force due to positioning deviation. The integrally formed base provides stable support and a fixed foundation for the bearing housing 3, and facilitates connection with the lower support beam 13. This structural design reduces the weight of the bearing housing 3 while taking into account the support stability and installation convenience, effectively improving the positioning accuracy of the bearing 5 under test and ensuring the reliability of the testing process.

[0049] The implementation principle of a bearing testing fixture in this application embodiment is as follows: When testing the bearing 5 to be tested, the bearing 5 to be tested is first placed on the spindle 4, and the spindle 4 passes through the bearing seat 3 symmetrically arranged at the top of the lower support beam 13 laterally; the outer surface of the bearing 5 to be tested is in contact with the inner surface of the bearing seat 3, and the outer surface of the spindle 4 is in contact with the inner surface of the bearing 5 to be tested.

[0050] Then, the jack 2 is placed above the main shaft 4 and between the adjacent bearing seats 3. One end of the jack 2 abuts against the main shaft 4, and the other end provides a reaction force support point through the upper support beam 11.

[0051] When jack 2 is activated, it applies an upward lifting force to the upper support beam 11 while simultaneously applying downward pressure to the main shaft 4, causing the main shaft 4 and bearing seat 3 to stably abut against the lower support beam 13.

[0052] The pressure sensor at the bottom of the upper support beam 11 is aligned with the center line of the jack 2's push rod, allowing for real-time and accurate measurement of the pressure applied by the jack 2. This pressure can be displayed on an external instrument. Operators can observe the pressure value, adjust the jack 2 to the maximum load the bearing can withstand, and wait for the pressure value to stabilize before placing the entire testing fixture into a temperature and humidity control chamber. The chamber door is then closed to conduct tests under different temperature and humidity conditions to obtain data on the performance changes of the bearing 5 under different environments, such as thermal expansion and contraction. Alternatively, the jack 2 can be started inside the temperature and humidity control chamber to conduct tests according to actual testing needs. For ease of testing, an electrically controlled jack 2 can be selected.

[0053] 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. A bearing testing fixture, characterized in that: The device includes a support frame (1), a jack (2), and a bearing device. The support frame (1) has a receiving space. The jack (2) and the bearing device are located in the receiving space of the support frame. The first force-applying end of the jack (2) abuts against the bearing device. The second force-applying end of the jack (2) acts on the support frame (1). The bearing device is used to place the bearing to be tested (5) and to transmit the force applied by the jack (2) to the bearing to be tested (5).

2. The bearing testing fixture according to claim 1, characterized in that, The support frame (1) includes an upper support beam (11), a lower support beam (13) disposed opposite to the upper support beam (11), and a connecting beam (12) that vertically connects the upper support beam (11) and the lower support beam (13). The bearing device is disposed on the lower support beam (13).

3. The bearing testing fixture according to claim 2, characterized in that, It also includes a pressure sensor (6), which is located between the second force-applying end of the jack (2) and the upper support beam (11).

4. The bearing testing fixture according to claim 2, characterized in that, The bearing device includes a main shaft (4) and a bearing seat (3). The bearing seat (3) is located on the lower support beam (13) and is used to accommodate the bearing to be tested (5). The main shaft (4) is used to pass through the bearing to be tested (5). The first force-applying end of the jack (2) abuts against the main shaft (4).

5. A bearing testing fixture according to claim 4, characterized in that, There are two bearing seats (3), and the two bearing seats (3) are arranged sequentially along the length direction of the main shaft (4). The first force-applying end of the jack (2) is located between the two bearing seats (3).

6. A bearing testing fixture according to claim 5, characterized in that, The two bearing seats (3) are arranged symmetrically with respect to the spindle (4).

7. The bearing testing fixture according to claim 1, characterized in that, The jack (2) is a mechanical jack (2).

8. A bearing testing fixture according to claim 2, characterized in that, The connecting beam (12) is fixedly connected to the upper support beam (11) and the lower support beam (13) by welding, riveting or bolting.

9. A bearing testing fixture according to claim 8, characterized in that, The upper support beam (11), the lower support beam (13), and the connecting beam (12) are C-shaped steel, H-shaped steel, or I-shaped steel.

10. A bearing testing fixture according to claim 4, characterized in that, The bearing housing (3) includes an annular portion and a base integrally formed with the annular portion. The annular portion is used to accommodate the bearing to be tested (5), and the base is disposed on the lower support beam (13).

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