A device for testing overturning moment

Abstract

The utility model discloses a kind of overturning moment testing devices, comprising: rack, the rack is provided with base pedestal, the base pedestal is equipped with motor, the motor is connected with the bearing inner ring fixed assembly of to-be-measured bearing;Loading arm, the loading arm is connected with the bearing outer ring fixed assembly of to-be-measured bearing;The base pedestal has first through-hole, the loading arm has second through-hole, loading component is worn in the first through-hole and the second through-hole, the loading component is equipped with spring, the spring abuts the base pedestal and / or the loading arm, the loading component is further provided with pressure sensor.The technical scheme provided in the application can ensure the accuracy of bearing overturning moment test.

Description

Technical Field

[0001] This application belongs to the field of bearing testing devices, and particularly relates to a device for testing overturning moment. Background Technology

[0002] The overturning moment of a bearing refers to the moment that acts on the bearing and causes it to tilt about its bottom horizontal axis. If this moment is too large, it will cause the bearing or equipment to become unstable, thus affecting the bearing's ultimate load capacity. Therefore, it is necessary to test the overturning moment that the bearing can withstand.

[0003] Existing overturning moment testing devices rely on the screw to directly apply force to the loading arm when applying torque. However, in the actual bearing overturning moment test, the bearing under test will cause the loading arm to float due to raceway wear. Traditional rigid loading cannot support the floating of the loading arm. Therefore, the rigid loading torque method in the existing technology will lead to inaccurate test results. Utility Model Content

[0004] The purpose of this application is to provide a device for testing overturning moment, so as to at least solve the problem of inaccurate testing of bearing overturning moment.

[0005] According to an embodiment of this application, a rollover moment testing device is provided, comprising: A test bench, wherein a base is provided on the test bench, and a motor is mounted on the base, the motor being connected to the inner ring fixing assembly of the bearing to be tested; A loading arm is connected to the outer ring fixing assembly of the bearing to be tested. The base has a first through hole, the loading arm has a second through hole, the loading component passes through the first through hole and the second through hole, the loading component is fitted with a spring, the spring abuts against the base and / or the loading arm, and the loading component is also provided with a pressure sensor.

[0006] Optionally, the loading component includes a driving member, an adjusting screw connected to the driving member, and a first washer. The diameter of the second through hole is larger than the outer diameter of the adjusting screw. The first washer is sleeved on the adjusting screw and located between the driving member and the loading arm. The first washer has an arc-shaped surface, and the arc-shaped surface of the first washer faces the second through hole.

[0007] Optionally, the loading assembly further includes an adjusting stud, the spring is sleeved on the adjusting stud, the adjusting screw is threadedly engaged with the adjusting stud, and a second washer is fixedly connected to the adjusting stud. The second washer has an arc-shaped surface, and the arc-shaped surface of the second washer faces the spring.

[0008] Optionally, the base has a plurality of first through holes, the loading arm has a plurality of second through holes, the plurality of first through holes are all located on the same side of the inner ring fixing assembly of the bearing under test, and the plurality of second through holes are all located on the same side of the outer ring fixing assembly of the bearing under test.

[0009] Optionally, the length of the loading arm is less than the length of the foundation base.

[0010] Optionally, the base is connected to a limiting screw, the loading arm has a third through hole, the limiting screw and the first through hole are located on the same side of the inner ring fixing assembly of the bearing under test, the third through hole and the second through hole are both located on the same side of the outer ring fixing assembly of the bearing under test, the limiting screw is at least partially located in the third through hole, the third through hole is an elongated hole, the limiting screw is threadedly engaged with a limiting nut, and the length of the third through hole is greater than the width of the limiting nut.

[0011] Optionally, the base is connected to a plurality of the limiting screws, and the loading arm has a plurality of the third through holes.

[0012] Optionally, the base is equipped with a first bearing and a second bearing, which are fitted onto the inner ring fixing assembly of the bearing to be tested.

[0013] Optionally, the bearing inner ring fixing assembly to be tested includes: The upper part of the intermediate shaft is connected to the inner ring of the first bearing and the inner ring of the second bearing. The upper part of the intermediate shaft has a first protrusion that abuts against the upper end face of the inner ring of the second bearing. The lower part of the intermediate shaft is connected to the upper part of the intermediate shaft and the rotating shaft of the motor. The lower part of the intermediate shaft is connected to the inner ring of the second bearing. The lower part of the intermediate shaft has a second protrusion that abuts against the lower end face of the inner ring of the second bearing. The base has a third protrusion, which abuts between the lower end face of the outer ring of the first bearing and the upper end face of the outer ring of the second bearing. The outer ring of the second bearing is connected to the motor mounting base, which is connected to the base. The motor mounting base has a fourth protrusion that abuts against the lower end face of the outer ring of the second bearing.

[0014] Optionally, the bearing inner ring fixing assembly further includes: an intermediate support shaft, which is connected to the upper part of the intermediate shaft, and the intermediate support shaft is used to connect the inner ring of the bearing under test.

[0015] Optionally, the bearing inner ring fixing assembly to be tested includes: An intermediate support shaft having a first end face, the first end face being used to abut against the lower end face of the inner ring of the test bearing; A pressure cap, which is threaded to the intermediate support shaft and is used to abut against the upper end face of the inner ring of the test bearing; The outer ring fixing assembly of the bearing under test includes: A lower mounting flange is provided, which is connected to the loading arm, and is used to abut against the lower end face of the outer ring of the bearing to be tested. An upper mounting flange is provided, which is connected to the lower mounting flange. The upper mounting flange is used to abut against the upper end face of the outer ring of the bearing to be tested.

[0016] One technical advantage of this application embodiment is that by sleeved with a spring on the loading component, and with the spring abutting against the base and / or the loading arm, the spring allows for floating loading during the process of the loading component applying force to the loading arm. This allows for a certain amount of floating during the test, thus making the test results more accurate.

[0017] Other features and advantages of this application will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0018] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments of the present application and, together with their description, serve to explain the principles of the present application.

[0019] Figure 1 This is an isometric view of the overturning moment testing device in the first embodiment of this application; Figure 2 For along Figure 1 A sectional view of line AA in the diagram; Figure 3 for Figure 1 A magnified view of part B in the image; Figure 4 for Figure 1 A magnified view of part C of the document; Figure 5 for Figure 1 A magnified view of part D in the image; Figure 6 This is a force diagram of the overturning moment testing device in the first embodiment of this application; Figure 7 for Figure 6 A cross-sectional view of the overturning moment testing device in the middle; Figure 8 This is an isometric view of the overturning moment testing device in the second embodiment of this application; Figure 9 This is a cross-sectional view of the overturning moment testing device in the second embodiment of this application.

[0020] Explanation of reference numerals in the attached drawings: Frame 100; Base 101; First through hole 102; Limiting screw 103; Limiting nut 104; First bearing 105; Second bearing 106; Third protrusion 107; Base plate 108; Support column 109; Motor 200; Motor mounting base 201; Fourth protrusion 202; Inner ring fixing assembly of the bearing to be tested 300; Upper part of intermediate shaft 301; First protrusion 302; Lower part of intermediate shaft 303; Second protrusion 304; Middle Intermediate support shaft 305; first end face 306; pressure cap 307; loading arm 400; second through hole 401; third through hole 402; outer ring fixing assembly of the bearing under test 500; lower mounting flange 501; upper mounting flange 502; loading assembly 600; driving component 601; adjusting screw 602; first gasket 603; arc-shaped surface 604; adjusting stud 605; second gasket 606; spring 700; pressure sensor 800; bearing under test 900. Detailed Implementation

[0021] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the present application.

[0022] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the scope of this application and its application or use.

[0023] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0024] In all the examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0025] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures.

[0026] In the specification and claims of this utility model, the terms "first" and "second" may explicitly or implicitly include one or more of those features. In the description of this utility model, unless otherwise stated, "multiple" means two or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0027] In the description of this utility model, it should be understood that if the terms "upper", "lower", "left", "right" and other terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model 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 utility model.

[0028] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0029] refer to Figure 1 , Figure 2 , Figure 3 , Figure 8 and Figure 9 This application provides a bearing overturning moment testing device, comprising: a stand 100, wherein the stand 100 is provided with a base 101, the base 101 is mounted with a motor 200, the motor 200 is connected to the inner ring fixing assembly 300 of the bearing to be tested; a loading arm 400, the loading arm 400 is connected to the outer ring fixing assembly 500 of the bearing to be tested; the base 101 has a first through hole 102, the loading arm 400 has a second through hole 401, a loading assembly 600 passes through the first through hole 102 and the second through hole 401, the loading assembly 600 is fitted with a spring 700, the spring 700 abuts against the base 101 and / or the loading arm 400, and the loading assembly 600 is also provided with a pressure sensor 800.

[0030] Further explanation: In this embodiment, the test bench 100 includes a base plate 108, a support column 109 mounted on the base plate 108, and a base 101 mounted on the support column 109. The base plate 108 provides bottom support, and the support column 109, which can be made of copper or steel, supports the base 101 and keeps it a distance away from the base plate 108. The base 101 mainly supports structures such as the motor 200 and applies torque to the bearing 900 under test in conjunction with the loading arm 400. In other embodiments of this utility model, the test bench 100 can also use a truss or other structure, as long as it can provide support and apply torque in conjunction with the loading arm 400. The motor 200 provides torque to the bearing 900 under test, simulating the rotational operation of the bearing 900. The motor 200 can be fixed to the base 101 via flanges, brackets, etc. Its shaft can be connected to the inner ring fixing assembly 300 of the bearing under test via belt drive, bolt connection, etc., thereby driving the inner ring of the bearing under test 900 to rotate. The inner ring fixing assembly 300 can adopt the structure described below, or it can be a single shaft structure that is interference-fitted or welded to the inner ring of the bearing under test 900, or it can adopt other structures in the prior art, serving to transmit the torque of the motor 200 to the inner ring of the bearing under test 900. The left side of the loading arm 400 is connected to the outer ring fixing assembly 500 of the bearing under test, and the right side is connected to the loading assembly 600, so that the loading assembly 600 can apply torque to the outer ring of the bearing under test 900. The outer ring fixing assembly 500 of the bearing under test can adopt the structure described below, or it can adopt a clamping structure, etc., to achieve a fixed connection with the outer ring of the bearing under test 900. The loading component 600 may adopt the structure described below or other types of structures, thereby applying a downward force to the loading arm 400.

[0031] refer to Figure 2 and Figure 3 In the first embodiment of this application, the base 101 has a first through hole 102, and the loading arm 400 has a second through hole 401. The first through hole 102 and the second through hole 401 are coaxial, allowing the loading assembly 600 to pass through the first through hole 102 and the second through hole 401. The loading assembly 600 is fitted with a spring 700, which abuts against the base 101. A pressure sensor 800 is provided at the lower end of the spring 700. When the loading assembly 600 applies downward pressure to the loading arm 400, the spring 700 is compressed, and the magnitude of the force can be measured by the pressure sensor 800.

[0032] In other embodiments of this invention, the spring 700 can also abut against the loading arm 400, for example, by placing the spring 700 between the first washer 603 and the loading arm 400; or, the spring 700 can also abut against both the loading arm 400 and the base 101 simultaneously, for example, by placing the spring 700 between the loading arm 400 and the base 101. The spring 700 simply needs to be compressible when the loading assembly 600 applies downward pressure to the loading arm 400.

[0033] like Figure 3 As shown, the pressure sensor 800 is disposed at the lower end of the spring 700. However, in other embodiments of this invention, the pressure sensor may be disposed in other locations, such as between the spring 700 and the base 101, or between the first gasket 603 and the loading arm 400. The working principle of the pressure sensor 800 in measuring the pressure applied by the loading assembly 600 is prior art and will not be described in detail herein.

[0034] During the overturning moment test, because the spring 700 is compressed when the loading component 600 applies downward pressure F, the spring 700 is allowed to float under load, and a certain amount of floating is allowed during the test, so the test results are more accurate.

[0035] refer to Figure 3 In the first embodiment of this application, the loading component 600 includes a driving member 601, an adjusting screw 602 connected to the driving member 601, and a first washer 603. The diameter of the second through hole 401 is larger than the outer diameter of the adjusting screw 602. The first washer 603 is sleeved on the adjusting screw 602 and located between the driving member 601 and the loading arm 400. The first washer 603 has an arc-shaped surface 604, which faces the second through hole 401.

[0036] To further explain, in such Figure 3In the illustrated embodiment, the driving component 601 is a nut, which can be manually turned to extend or retract the adjusting screw 602; therefore, a manual driving method is used. In other embodiments of this utility model, the driving component 601 can also be driven by a mechanical method such as a motor drive or a cylinder drive. Taking the driving component 601 as a nut as an example, the driving component 601 is threadedly connected to the adjusting screw 602. The diameter of the second through hole 401 is larger than the outer diameter of the adjusting screw 602, thus allowing the adjusting screw 602 to have a certain amount of swing within the second through hole 401. The first washer 603 is sleeved on the adjusting screw 602 and located between the driving component 601 and the loading arm 400, and the arc-shaped surface 604 of the first washer 603 faces the second through hole 401, that is, the arc-shaped surface 604 of the first washer 603 abuts against the loading arm 400. The advantage of this structure is that as the downward pressure on the loading arm 400 increases, the loading arm 400 will deflect at a certain angle. At this time, since the arc-shaped surface 604 of the first washer 603 is always pressed against the second through hole 401, and the diameter of the second through hole 401 is larger than the outer diameter of the adjusting screw 602, even if the loading arm 400 deflects at a large angle, the nut at the top of the adjusting screw 602 (i.e., the driving component 601) can still be rotated to perform loading normally.

[0037] like Figure 3 As shown, the loading assembly 600 also includes an adjusting stud 605. A spring 700 is sleeved on the adjusting stud 605, and an adjusting screw 602 is threadedly engaged with the adjusting stud 605. A second washer 606 is fixedly connected to the adjusting stud 605. The second washer 606 has an arc-shaped surface 604, which faces the spring 700.

[0038] To further explain, the adjusting stud 605 is machined with internal threads, and the adjusting screw 602 is machined with external threads. The internal thread of the adjusting stud 605 and the external thread of the adjusting screw 602 mate, making the connection simple. The adjusting stud 605 passes through the first through hole 102, and the spring 700 is sleeved on the adjusting stud 605 and located below the base 101. The upper end of the pressure sensor 800 is threaded to the adjusting stud 605, and the lower end is threaded to the second washer 606, with the arc-shaped surface 604 of the second washer 606 facing the spring 700. When the drive component 601 is rotated, the adjusting screw 602 extends and retracts up and down, causing the adjusting stud 605 to move up and down. The adjusting stud 605, through the pressure sensor 800 and the second washer 606, causes the spring 700 to undergo elastic deformation. During this process, the pressure sensor 800 can measure the pressure value. In this embodiment, although the adjusting stud 605 is indirectly connected to the second washer 606 via the pressure sensor 800, in other embodiments of this invention, the adjusting stud 605 can be directly connected to the second washer 606. For example, the pressure sensor 800 can be positioned between the upper end of the spring 700 and the base 101, allowing the lower end of the adjusting stud 605 to be directly threaded or welded to the second washer 606. Since the arc-shaped surface 604 of the second washer 606 faces the spring 700 and abuts against it, even if the adjusting stud 605 deflects during torque loading, good contact between the second washer 606 and the lower end of the spring 700 can still be ensured, thus guaranteeing that the spring 700 can be compressed normally.

[0039] like Figure 1 and Figure 2 As shown, in the first embodiment of this application, the base 101 has a plurality of first through holes 102, and the loading arm 400 has a plurality of second through holes 401. The plurality of first through holes 102 are all located on the same side of the inner ring fixing assembly 300 of the bearing to be tested, and the plurality of second through holes 401 are all located on the same side of the outer ring fixing assembly 500 of the bearing to be tested.

[0040] To clarify further, "multiple" refers to at least two. Figure 2 In this design, multiple first through holes 102 are located on the right side of the inner ring fixing assembly 300 of the bearing under test, and multiple second through holes 401 are also located on the right side of the outer ring fixing assembly 500 of the bearing under test. This allows the loading assembly 600 to be positioned in different locations, or multiple loading assemblies 600 can be set according to the required loading force during testing, or even replaced with an automated torque loading device, resulting in a wider torque range and automation of the testing process.

[0041] like Figure 8 and Figure 9As shown, in the second embodiment of this application, only one loading component 600 is provided. In this case, the base 101 may have only one first through hole 102, and the loading arm 400 may have only one second through hole 401. In the second embodiment of this application, the length of the loading arm 400 in the left-right direction can be less than the length of the base 101, thus allowing the loading arm 400 to have a larger vertical swing amplitude during testing, thereby adapting to a wider testing range.

[0042] like Figure 3 As shown, in the first embodiment of this application, the base 101 is connected to a limiting screw 103, and the loading arm 400 has a third through hole 402. The limiting screw 103 and the first through hole 102 are located on the same side of the inner ring fixing assembly 300 of the bearing under test, and the third through hole 402 and the second through hole 401 are both located on the same side of the outer ring fixing assembly 500 of the bearing under test. The limiting screw 103 is at least partially located within the third through hole 402. The third through hole 402 is an elongated hole. The limiting screw 103 is threadedly engaged with the limiting nut 104, and the length D of the third through hole 402 is greater than the width d of the limiting nut 104.

[0043] To further explain, the limiting screw 103 can be connected to the base 101 via threaded connection, welding, or other methods. Both the limiting screw 103 and the first through hole 102 are located on the right side of the inner ring fixing assembly 300 of the bearing under test, and both the third through hole 402 and the second through hole 401 are located on the right side of the outer ring fixing assembly 500 of the bearing under test. After the limiting screw 103 is connected to the base 101, it is inserted into the third through hole 402. The upper end can extend out of the third through hole 402 or not. Thus, after the limiting nut 104 is threadedly engaged with the limiting screw 103, the limiting nut 104 can be located within the third through hole 402, thereby limiting the loading arm 400. During the rotation of the inner ring of the bearing under test 900 driven by the motor 200, the outer ring of the bearing under test 900 also tends to cause the loading arm 400 to rotate and deflect in a plane perpendicular to the paper. At this time, the limiting nut 104 can limit the loading arm 400 from rotating and deflecting during the test. The third through hole 402 is an elongated hole, and the length D of the third through hole 402 is greater than the width d of the limiting nut 104. Therefore, the limiting nut 104 has a certain amount of movement in the left and right directions, which allows the loading arm 400 to swing up and down a certain amount when subjected to a downward force. However, the angle of the swing is limited, thereby controlling the test conditions and obtaining more accurate and reliable test results.

[0044] like Figure 2 As shown, in the first embodiment of this application, the base 101 is connected to a plurality of limiting screws 103, and the loading arm 400 has a plurality of third through holes 402.

[0045] To further explain, "multiple" refers to at least two. Each pair of limit screws 103 and third through hole 402 can correspond to one loading component 600, so that when multiple loading components 600 are used, a better limiting effect can be achieved on the loading arm 400.

[0046] like Figure 8 and Figure 9 As shown, in the second embodiment of this application, since only one loading component 600 is provided and since the loading arm 400 is relatively short, the base 101 can be connected to only one limiting screw 103, and correspondingly, the loading arm 400 can also have only one third through hole 402.

[0047] like Figure 2 and Figure 4 As shown, the base 101 is equipped with a first bearing 105 and a second bearing 106, and the first bearing 105 and the second bearing 106 are sleeved on the inner ring fixing assembly 300 of the bearing to be tested.

[0048] To further explain, the first bearing 105 and the second bearing 106 are fitted onto the inner ring fixing assembly 300 of the bearing under test. This ensures that when the bearing under test 900 above receives a large offset torque, the first bearing 105 and the second bearing 106 can provide a sufficiently high load-bearing capacity, ensuring that the rotational torque does not change significantly during the test, thus making the test more stable.

[0049] like Figure 4 As shown, in this embodiment, the bearing inner ring fixing assembly 300 includes: an upper intermediate shaft 301, which is connected to the inner ring of the first bearing 105 and the inner ring of the second bearing 106, the upper intermediate shaft 301 having a first protrusion 302 abutting against the upper end face of the inner ring of the second bearing 106; and a lower intermediate shaft 303, which is connected to the upper intermediate shaft 301 and the rotating shaft of the motor 200, the lower intermediate shaft 303 being connected to the inner ring of the second bearing 106. The lower part 303 of the shaft has a second protrusion 304, which abuts against the lower end face of the inner ring of the second bearing 106; the base 101 has a third protrusion 107, which abuts between the lower end face of the outer ring of the first bearing 105 and the upper end face of the outer ring of the second bearing 106; the outer ring of the second bearing 106 is connected to the motor mounting base 201, which is connected to the base 101, and the motor mounting base 201 has a fourth protrusion 202, which abuts against the lower end face of the outer ring of the second bearing 106.

[0050] To further explain, the connection between the upper part 301 and the lower part 303 of the intermediate shaft primarily serves to transmit the torque of the motor 200 to the inner ring of the bearing 900 under test. The upper part 301 of the intermediate shaft is connected to the inner ring of the first bearing 105 via an interference fit or a transition fit, and the upper part 301 of the intermediate shaft is connected to the inner ring of the second bearing 106 via an interference fit or a transition fit. The first protrusion 302 of the upper part 301 of the intermediate shaft abuts against the upper end face of the inner ring of the second bearing 106; the lower part 303 of the intermediate shaft is connected to the rotating shaft of the motor 200. The lower part 303 of the intermediate shaft is connected to the inner ring of the second bearing 106 via an interference fit or a transition fit, and the second protrusion 304 of the lower part 303 of the intermediate shaft abuts against the lower end face of the inner ring of the second bearing 106. The third protrusion 107 of the base 101 abuts between the lower end face of the outer ring of the first bearing 105 and the upper end face of the outer ring of the second bearing 106. The outer ring of the second bearing 106 is connected to the motor mounting base 201, which is connected to the base 101. The primary function of the motor mounting base 201 is to mount the motor 200. Additionally, the fourth protrusion 202 of the motor mounting base 201 abuts against the lower end face of the outer ring of the second bearing 106. In this way, the outer ring of the second bearing 106 is securely held by the base 101 and the motor mounting base 201, while the inner ring of the second bearing 106 is securely held by the upper part 301 and the lower part 303 of the intermediate shaft, ensuring reliable torque transmission.

[0051] In the embodiments of this application, the split design of the upper part 301 and the lower part 303 of the intermediate shaft is beneficial for the replacement and installation of components.

[0052] like Figure 5 As shown, in this embodiment, the bearing inner ring fixing assembly 300 further includes: an intermediate support shaft 305, which is connected to the upper part 301 of the intermediate shaft, and the intermediate support shaft 305 is used to connect the inner ring of the bearing 900 under test.

[0053] To further explain, the intermediate support shaft 305 can be fixedly connected to the inner ring of the bearing under test 900 through interference fit, welding or other means. After the intermediate support shaft 305 is connected to the upper part 301 of the intermediate shaft, the rotating shaft of the motor 200 can drive the inner ring of the bearing under test 900 to rotate.

[0054] like Figure 5As shown, the bearing inner ring fixing assembly 300 in this embodiment includes: an intermediate support shaft 305, the intermediate support shaft 305 having a first end face 306, the first end face 306 being used to abut against the lower end face of the inner ring of the bearing 900 under test; and a pressure cap 307, the pressure cap 307 being threadedly connected to the intermediate support shaft 305 and being used to abut against the upper end face of the inner ring of the bearing 900 under test. The bearing outer ring fixing assembly 500 includes: a lower mounting flange 501, the lower mounting flange 501 being connected to the loading arm 400, the lower mounting flange 501 being used to abut against the lower end face of the outer ring of the bearing 900 under test; and an upper mounting flange 502, the upper mounting flange 502 being connected to the lower mounting flange 501, the upper mounting flange 502 being used to abut against the upper end face of the outer ring of the bearing 900 under test.

[0055] To further clarify, the bearing 900 under test is the test object of the overturning moment testing device of this utility model, and should not be considered as part of the testing device. The first end face 306 of the intermediate support shaft 305 abuts against the lower end face of the inner ring of the bearing 900 under test. After the pressure cap 307 is connected to the intermediate support shaft 305, it directly or indirectly abuts against the upper end face of the inner ring of the bearing 900 under test through a gasket. Therefore, the inner ring of the bearing 900 under test is firmly clamped by the intermediate support shaft 305 and the pressure cap 307. The lower mounting flange 501 is connected to the loading arm 400 by bolts, welding, or other means. The lower mounting flange 501 abuts against the lower end face of the outer ring of the bearing 900 under test. The upper mounting flange 502 is connected to the lower mounting flange 501 by bolts, riveting, or other means. After connection, the upper mounting flange 502 abuts against the upper end face of the outer ring of the bearing 900 under test. Therefore, the outer ring of the bearing 900 under test is firmly clamped by the upper mounting flange 502 and the lower mounting flange 501. This structure ensures that both the inner and outer rings of the bearing under test are stably fixed, guaranteeing a smooth testing process and accurate test results.

[0056] The overturning moment testing device in this embodiment of the utility model only requires replacing a few parts, such as the intermediate support shaft 305, the pressure cap 307, the lower mounting flange 501, and the upper mounting flange 502, for bearings 900 with different inner and outer diameters. It has greater versatility and occupies less space.

[0057] like Figure 6 and Figure 7As shown, when testing the bearing 900 under test using the overturning torque testing device, the bearing 900 is first installed on the device. Then, the motor 200 is powered on and its speed is controlled to rotate the inner ring of the bearing 900. The loading component 600 then applies a downward force F to the loading arm 400. The pressure sensor 800 obtains the pressure value. Since the distance between the loading component 600 and the bearing 900 is known, the torque applied by the loading component 600 to the outer ring of the bearing 900 can be calculated. As the loading torque is further increased, the loading arm 400 will swing downwards. The length D of the third through hole 402 is greater than the width d of the limit nut 104, allowing the downward swing of the loading arm 400 to reach a certain amplitude. The loading torque is continuously increased through the drive component 601 until the bearing 900 under test makes an abnormal noise, and the value of the pressure sensor 800 is recorded. The loading torque is further increased to the set maximum torque, or until the bearing 900 under test stalls and jams. By recording the value of pressure sensor 800 during the test, the maximum load-bearing capacity of the bearing under test 900 can be obtained, that is, the maximum overturning moment value that the bearing under test 900 can withstand.

[0058] While specific embodiments of this application have been described in detail by way of examples, those skilled in the art should understand that the above examples are for illustrative purposes only and are not intended to limit the scope of this application. Those skilled in the art should understand that modifications can be made to the above embodiments without departing from the scope and spirit of this application. The scope of this application is defined by the appended claims.

Claims

1. A device for testing overturning moment, characterized in that, include: A test stand (100) is provided with a base base (101), and a motor (200) is installed on the base base (101). The motor (200) is connected to the inner ring fixing assembly (300) of the bearing to be tested. A loading arm (400) is connected to the outer ring fixing assembly (500) of the bearing to be tested; The base (101) has a first through hole (102), the loading arm (400) has a second through hole (401), the loading component (600) passes through the first through hole (102) and the second through hole (401), the loading component (600) is fitted with a spring (700), the spring (700) abuts against the base (101) and / or the loading arm (400), and the loading component (600) is also provided with a pressure sensor (800).

2. The overturning moment testing device according to claim 1, characterized in that, The loading assembly (600) includes a drive member (601), an adjusting screw (602) connected to the drive member (601), and a first washer (603). The diameter of the second through hole (401) is larger than the outer diameter of the adjusting screw (602). The first washer (603) is sleeved on the adjusting screw (602) and located between the drive member (601) and the loading arm (400). The first washer (603) has an arc-shaped surface (604) facing the second through hole (401).

3. The overturning moment testing device according to claim 2, characterized in that, The loading assembly (600) further includes an adjusting stud (605), the spring (700) is sleeved on the adjusting stud (605), the adjusting screw (602) is threadedly engaged with the adjusting stud (605), and the adjusting stud (605) is fixedly connected with a second washer (606), the second washer (606) having an arc-shaped surface (604), the arc-shaped surface (604) of the second washer (606) facing the spring (700).

4. The overturning moment testing device according to claim 1, characterized in that, The base (101) has a plurality of first through holes (102), the loading arm (400) has a plurality of second through holes (401), the plurality of first through holes (102) are all located on the same side of the inner ring fixing assembly (300) of the bearing under test, and the plurality of second through holes (401) are all located on the same side of the outer ring fixing assembly (500) of the bearing under test.

5. The overturning moment testing device according to claim 1, characterized in that, The length of the loading arm (400) is less than the length of the base (101).

6. The overturning moment testing device according to claim 1, characterized in that, The base (101) is connected to a limiting screw (103), the loading arm (400) has a third through hole (402), the limiting screw (103) and the first through hole (102) are located on the same side of the inner ring fixing assembly (300) of the bearing to be tested, the third through hole (402) and the second through hole (401) are both located on the same side of the outer ring fixing assembly (500) of the bearing to be tested, the limiting screw (103) is at least partially located in the third through hole (402), the third through hole (402) is an elongated hole, the limiting screw (103) is threadedly engaged with the limiting nut (104), and the length (D) of the third through hole (402) is greater than the width (d) of the limiting nut (104).

7. The overturning moment testing device according to claim 6, characterized in that, The base (101) is connected to a plurality of the limiting screws (103), and the loading arm (400) has a plurality of the third through holes (402).

8. The overturning moment testing device according to claim 1, characterized in that, The base (101) is equipped with a first bearing (105) and a second bearing (106), and the first bearing (105) and the second bearing (106) are sleeved on the inner ring fixing assembly (300) of the bearing to be tested.

9. The overturning moment testing device according to claim 8, characterized in that, The bearing inner ring fixing assembly (300) to be tested includes: The upper part (301) of the intermediate shaft is connected to the inner ring of the first bearing (105) and the inner ring of the second bearing (106). The upper part (301) of the intermediate shaft has a first protrusion (302) that abuts against the upper end face of the inner ring of the second bearing (106). The lower part (303) of the intermediate shaft is connected to the upper part (301) of the intermediate shaft and the rotating shaft of the motor (200). The lower part (303) of the intermediate shaft is connected to the inner ring of the second bearing (106). The lower part (303) of the intermediate shaft has a second protrusion (304) that abuts against the lower end face of the inner ring of the second bearing (106). The base base (101) has a third protrusion (107) that abuts between the lower end face of the outer ring of the first bearing (105) and the upper end face of the outer ring of the second bearing (106). The outer ring of the second bearing (106) is connected to the motor mounting base (201), which is connected to the base base (101). The motor mounting base (201) has a fourth protrusion (202), which abuts against the lower end face of the outer ring of the second bearing (106).

10. The overturning moment testing device according to claim 9, characterized in that, The bearing inner ring fixing assembly (300) further includes: an intermediate support shaft (305), which is connected to the upper part (301) of the intermediate shaft, and the intermediate support shaft (305) is used to connect the inner ring of the bearing (900) under test.

11. The overturning moment testing device according to claim 1, characterized in that, The bearing inner ring fixing assembly (300) to be tested includes: An intermediate support shaft (305) has a first end face (306) for abutting against the lower end face of the inner ring of the test bearing (900); A pressure cap (307) is threaded to the intermediate support shaft (305) and is used to abut against the upper end face of the inner ring of the test bearing (900); The outer ring retaining assembly (500) of the bearing under test includes: A lower mounting flange (501) is connected to the loading arm (400), and the lower mounting flange (501) is used to abut against the lower end face of the outer ring of the bearing to be tested (900); An upper mounting flange (502) is provided, which is connected to the lower mounting flange (501). The upper mounting flange (502) is used to abut against the upper end face of the outer ring of the bearing to be tested (900).

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