Testing device

Abstract

A testing device is used for testing wear resistance of a bearing to be tested and comprises a testing platform, a stand column, a main beam, a main bearing seat, a first driving mechanism and an elastic loading assembly. The lower end of the stand column is fixed on the test platform, the main bearing seat is fixed at the upper end of the stand column and used for sleeving a to-be-tested bearing, the main beam is transversely arranged on the stand column and used for penetrating through the to-be-tested bearing, and the output end of the first driving mechanism is connected with the main beam. The elastic loading assembly is fixed on the test platform and is connected with the main beam to provide various different loading forces for the main beam, and the main beam is driven by the first driving mechanism to rotate. The elastic loading assembly comprises a second driving mechanism, a lifting mechanism and an elastic piece, the second driving mechanism adjusts the elastic force of the elastic piece through the lifting mechanism, and the elastic piece is connected with the lifting mechanism and the main beam. According to the testing device, the bearing to be tested can meet complex and changeable axial pressure requirements in a severe environment.

Description

Technical Field

[0001] The utility model relates to the field of testing, in particular to a testing device. Background Art

[0002] At present, the photovoltaic brackets in the photovoltaic industry are usually installed in remote mountainous areas with harsh application environments. The harsh situations that can occur at the project site of the photovoltaic brackets include, but are not limited to, strong winds and heavy rains. All of the above problems will cause the axial pressure of the bearings in the photovoltaic brackets from the main beam to change. The existing wear resistance test of bearings mainly tests whether the wear resistance of the bearings meets the requirements by testing the unchanged axial pressure of the bearings from the main beam in a stable environment. The test basis is relatively single, and the test environment is quite different from the actual scenario. Therefore, the bearings that have passed the current single axial pressure test may still wear in harsh environments, and severely worn bearings may even cause the entire photovoltaic bracket project to be damaged and unable to continue to be used. Therefore, the existing bearing wear resistance test of the testing device can no longer meet the needs of harsh environments. Content of the Utility Model

[0003] The purpose of the utility model is to provide a testing device, which can simulate the complex and changeable axial pressure under harsh environments to test bearings, so that the bearings to be tested meet the needs of harsh environments.

[0004] To achieve the above purpose, the utility model adopts the following technical scheme: A testing device for testing the wear resistance of a bearing to be tested, including a testing platform, a column, a main beam, a main bearing seat, a first driving mechanism and an elastic loading component. The lower end of the column is fixed on the testing platform, the main bearing seat is fixed at the upper end of the column and is used to sleeved outside the bearing to be tested, the main beam is horizontally arranged on the column and is used to pass through the bearing to be tested, and the output end of the first driving mechanism is connected to the main beam; The elastic loading component is fixed on the testing platform and is connected to the main beam to provide a variety of different loading forces for the main beam. The main beam rotates under the driving action of the first driving mechanism. The elastic loading component includes a second driving mechanism, a lifting mechanism and an elastic member. The second driving mechanism adjusts the elastic force of the elastic member through the lifting mechanism, and the elastic member is respectively connected to the lifting mechanism and the main beam.

[0005] As a further improved technical scheme of the utility model, the lifting mechanism includes a seat body and a lead screw. The seat body is fixed on the testing platform. The second driving mechanism can drive the lead screw to extend upward and / or retract downward relative to the seat body. The upper end of the elastic member is connected to the main beam, and the lower end of the elastic member is connected to the top of the lead screw.

[0006] As a further improved technical solution of the present utility model, the elastic loading assembly further includes a sensing element for sensing the load force. The sensing element is positioned at the top of the lead screw, and a second annular member is also provided at the top of the lead screw. Opposite ends of the elastic member with elastic deformation are respectively provided with a first hook portion located above and a second hook portion located below. The second annular member is connected to the second hook portion below the elastic member.

[0007] As a further improved technical solution of the present utility model, the elastic loading assembly further includes an auxiliary bearing seat sleeved on the main beam. A first annular member is provided at the bottom of the auxiliary bearing seat, so that the first hook portion above the elastic member is connected to the first annular member of the auxiliary bearing seat to realize the connection and fixation between the upper end of the elastic member and the main beam.

[0008] As a further improved technical solution of the present utility model, the elastic loading assembly further includes a pulley structure. The pulley structure includes a pulley and an auxiliary bearing. The auxiliary bearing is sleeved on the main beam and located inside the pulley. A steel wire rope is provided on the pulley. The first hook portion above the elastic member is connected to the steel wire rope.

[0009] As a further improved technical solution of the present utility model, a plurality of the columns and several main beams are provided on the test platform. One of the main beams is horizontally arranged on two of the columns. A to-be-tested bearing is arranged between each main beam and each of the corresponding columns connected thereto. Each main beam is correspondingly provided with a set of elastic loading assemblies. Each set of elastic loading assemblies includes two outer elastic loading assemblies connected to two corresponding ends of a main beam and an intermediate elastic loading assembly connected to the middle of the corresponding main beam. The load force of the intermediate elastic loading assembly is greater than the load forces of the two corresponding outer elastic loading assemblies.

[0010] As a further improved technical solution of the present utility model, it further includes a universal joint. The output end of the driving mechanism is connected to the main beam through the universal joint. The universal joint includes a first section, a second section, and a third section connected in sequence. The first section is connected to the output end of the driving mechanism. Opposite ends of the second section are respectively connected to the first section and the third section in a universal connection manner. The third section is connected to the main beam.

[0011] As a further improved technical solution of the present utility model, an installation base is provided at the bottom of each column. The installation base is provided with a first adjustment hole extending in a first direction to adjust the installation distance between two adjacent columns; and / or, an installation top seat is provided at the top of each column. The installation top seat or the column is provided with a plurality of second adjustment holes arranged in a second direction to adjust the installation height of the main beam on each column.

[0012] As a further improved technical solution of the present utility model, a funnel is provided above the bearing to be tested for the testing device, and a water receiving tray is provided below the bearing to be tested. A torsion sensing element is provided on the main beam.

[0013] Compared with the prior art, the testing device of the present utility model is provided with an elastic loading component. The elastic loading component is fixed on the testing platform and connected to the main beam to provide various different loading forces for the main beam. The main beam rotates under the driving action of the first driving mechanism. Therefore, the testing device of the present utility model can simulate the complex and changeable axial pressure under harsh environments to test the bearing to be tested, so that the bearing to be tested passing the test by the testing device of the present utility model can meet the requirements of harsh environments. Description of the Drawings

[0014] Figure 1 is the three-dimensional combined view of the testing device of the present utility model;

[0015] Figure 2 is the partial three-dimensional exploded view of the testing device of the present utility model;

[0016] Figure 3 is the three-dimensional combined schematic diagram of the adjustable mounting top seat of the testing device of the present utility model on the column;

[0017] Figure 4 is Figure 2 the enlarged view of part A in;

[0018] Figure 5 is Figure 2 the enlarged view of part B in;

[0019] Figure 6 is the other partial three-dimensional exploded view of the testing device of the present utility model;

[0020] Figure 7 is Figure 6 the enlarged view of part C in;

[0021] Figure 8 is the three-dimensional combined view of the universal joint in the testing device of the present utility model;

[0022] Figure 9 is the three-dimensional combined view of the elastic loading component in the testing device of the present utility model;

[0023] Figure 10 is the three-dimensional exploded view of the elastic loading component in the testing device of the present utility model;

[0024] Figure 11 is the three-dimensional combined view of the column, main beam, bearing to be tested, main bearing seat and elastic loading component on one side of the driving mechanism in the testing device of the present utility model;

[0025] Figure 12 is Figure 11 the front view of;

[0026] Figure 13 is a partial state diagram showing that the upper part of the elastic loading component in another embodiment of the test device of the present utility model is connected to the main beam through a pulley assembly;

[0027] Figure 14 is a three-dimensional view of the pulley in another embodiment of the test device of the present utility model. Specific Embodiments

[0028] The following will describe in detail the exemplary specific embodiments of the present utility model with reference to the accompanying drawings. If there are several specific embodiments, the features in these embodiments can be combined with each other without conflict. When the description involves the accompanying drawings, unless otherwise specified, the same numbers in different drawings represent the same or similar elements. The content described in the following exemplary specific embodiments does not represent all embodiments consistent with the present utility model; on the contrary, they are only examples of devices, products, and / or methods that are consistent with some aspects of the present utility model as recorded in the claims of the present utility model.

[0029] The terms used in the present utility model are only for the purpose of describing specific embodiments, and are not intended to limit the protection scope of the present utility model. The singular forms of "a", "the", or "said" used in the specification and claims of the present utility model are also intended to include the plural forms, unless the context clearly indicates otherwise.

[0030] It should be understood that the terms such as "first", "second", and similar terms used in the specification and claims of the present utility model do not represent any order, quantity, or importance, but are only used to distinguish the named features. Similarly, terms such as "a" or "one" do not represent a quantity limitation, but indicate that there is at least one. Unless otherwise indicated, the terms such as "front", "rear", "upper", "lower", etc. that appear in the present utility model are only for convenience of description, and are not limited to a specific position or a spatial orientation. The expression "including" or "comprising" and similar terms are an open-ended expression, meaning that the elements appearing before "including" or "comprising" cover the elements appearing after "including" or "comprising" and their equivalents, and this does not exclude that the elements appearing before "including" or "comprising" may also include other elements. If "several" appears in the present utility model, its meaning refers to two or more.

[0031] Please refer to Figures 1 to 14As shown in the figure, the present utility model discloses a testing device 100, which includes a testing platform 1, a column 2, a main beam 3, a main bearing seat 5, a first driving mechanism 7 and an elastic loading assembly 8. The lower end of the column 2 is fixed on the testing platform 1, and the main bearing seat 5 is fixed at the upper end of the column 2 and is used to sleeved outside the bearing under test 4. The main beam 3 is horizontally arranged on the column 2 and is used to pass through the bearing under test 4. The output end 70 of the first driving mechanism 7 is connected to the main beam 3 so that the first driving mechanism 7 can drive the main beam 3 to rotate. The elastic loading assembly 8 is fixed on the testing platform 1 and is connected to the main beam 3, providing various different loading forces for the main beam 3. The main beam 3 rotates under the driving action of the first driving mechanism 7. The testing device 100 of the present utility model is used for testing the wear resistance of the bearing under test 4. Specifically, the testing device 100 performs the wear resistance test on the bearing under test 4 by simulating the operating state of the photovoltaic tracking bracket system. Therefore, the testing device 100 of the present utility model needs to drive the rotation of the main beam 3 through the first driving mechanism 7; and because in a harsh environment, the axial pressure borne by the bearing under test 4 from the main beam 3 is complex and variable, therefore, the testing device 100 of the present utility model also sets an elastic loading assembly 8 to make the main beam 3 in a variable load state, so as to simulate the harsh environment in reality. Therefore, the bearing under test 4 tested and passed by the testing device 100 of the present utility model can meet the requirements of the harsh environment.

[0032] It should be noted that for the bearing under test 4 of the same specification, the provided loading force can be constant, or the loading force can be adjusted variably according to the actual test needs. In this embodiment, for the same bearing test, a constant loading force is preferably provided. When the corresponding loading force is reached, the motor drives the lead screw to keep the elastic member 83 at the corresponding loading force position, and the sensing element 84 senses the magnitude of the elastic force in real time to ensure that the loading force is at a constant value. In other embodiments, for the same bearing under test 4, under certain test requirements, the loading force can also be in a changing state during the entire test process;

[0033] For the bearings under test 4 of different specifications, the required test loading forces are different. It can be understood that: due to the different usage environments of the bearings under test 4 of different specifications, their corresponding loading forces are also different, and corresponding adjustments can be made through the elastic loading assembly 8 according to the actual required loading forces.

[0034] Please refer to Figure 7 , in the specific implementation manner, the first driving mechanism 7 includes a speed reducer, which can be a bipolar speed reducer, and further can be a bipolar worm and gear speed reducer. The first driving mechanism 7 has two output ends arranged oppositely, and each output end is connected to a main beam 3, so as to drive the two main beams 3 to rotate synchronously.

[0035] Please refer to Figures 9 to 11, the elastic loading component 8 includes a second driving mechanism 81, a lifting mechanism 82 and an elastic member 83. The second driving mechanism 81 adjusts the elastic force of the elastic member 83 through the lifting mechanism 82, and the elastic member 83 is respectively connected to the lifting mechanism 82 and the main beam 3. Specifically, the lifting mechanism 82 includes a seat body 821 and a lead screw 822, and the seat body 821 is fixed on the test platform 1; the second driving mechanism 81 can drive the lead screw 822 to extend upward and / or retract downward relative to the seat body 821. In a specific embodiment, the second driving mechanism 81 is a servo motor; the upper end of the elastic member 83 is connected to the main beam 3, and the lower end of the elastic member 83 is connected to the top of the lead screw 822. With such a setting, the elastic loading component 8 can provide various different loading forces for the main beam 3 by adjusting the magnitude of the elastic force of the elastic member. The tensile force of the elastic member 83 is controlled by the second driving mechanism 81 via the lead screw 822, and the second driving mechanism 81 is controlled by the operation console 200. Therefore, the test device 100 of the present utility model can accurately control and maintain the constancy of the loading force and the entire test time is adjustable. The adjustable time means that the length of the test cycle can be set according to the actual test needs. To improve the test efficiency, the time for the main beam 3 to rotate one cycle during the test is shorter than the time for the main beam to rotate one cycle in an actual photovoltaic project. For example, in a normal photovoltaic project, the main beam 3 rotates two cycles during a day. During the test, according to the actual test requirements, four, six, eight cycles, etc. can be set to rotate during a day. Specifically, the rotation speed of the main beam 3 during the test can be set to be higher than the rotation speed of the main beam in an actual photovoltaic project. In this way, the time for the main beam 3 to rotate one cycle during the test can be reduced, thereby increasing the number of rotation cycles of the main beam 3 during the test time. The specific operation is to set the rotation speed of the main beam 3 on the operation console 200. In addition, it should be noted that in addition to the lead screw structure, the elastic force of the elastic member 83 can also be adjusted by a worm and worm gear structure, a chain drive structure, a belt drive structure or a rack and pinion structure, etc. The elastic member 83 can be in the form of a helical spring, a volute spring, a leaf spring, a special-shaped spring, a spring piece, etc.

[0036] Please refer to Figures 9 to 11, the elastic loading component 8 further includes a sensing element 84 for sensing the load force, that is, reading the magnitude of the tensile force. The sensing element 84 is positioned at the top of the lead screw 822, and a second annular member 820 is also provided at the top of the lead screw 822. Opposite ends of the elastic member 83 that elastically deform are respectively provided with a first hook portion 831 located above and a second hook portion 832 located below. The second annular member 820 is connected to the second hook portion 832 below the elastic member 83. Specifically, the sensing element 84 can be annular. For example, the thin neck portion below the second annular member 820 passes through the sensing element 84 to position the sensing element 84 at the top of the lead screw 822 for testing the change in the magnitude of the tensile force. The specific implementation manner of the sensing element 84 can be a load cell; of course, in other implementation manners, the sensing element 84 can also be a tensiometer. It is well-known technology that both the load cell and the tensiometer can read the tensile force value, so it will not be elaborated here.

[0037] Regarding how the top of the elastic loading component 8 is positioned and connected to the main beam 3, the present utility model provides two specific implementation manners. Please refer to Figures 9 to 11 and then combine with Figure 7 , in the first specific implementation manner, the elastic loading component 8 further includes an auxiliary bearing seat 85 sleeved on the main beam 3. A first annular member 850 is provided at the bottom of the auxiliary bearing seat 85, and the first hook portion 831 above the elastic member 83 is connected to the first annular member 850 of the auxiliary bearing seat 85 to achieve the connection and fixation between the upper end of the elastic member 83 and the main beam 3. Of course, the positioning connection between the elastic member 83 and the auxiliary bearing seat 85 can also be achieved not through the connection method of hook and ring, but through a fixture tooling. The connection method of the fixture tooling will not be elaborated here. Please refer to Figure 13 and Figure 14 , in the second specific implementation manner, the elastic loading component 8 further includes a pulley structure 9. The pulley structure 9 includes a pulley 91 and an auxiliary bearing 92. The auxiliary bearing 92 is sleeved on the main beam 3 and is located inside the pulley 91. A steel wire rope 103 is provided on the pulley 91, and the first hook portion 831 above the elastic member 83 is connected to the steel wire rope 103. Compared with the positioning connection method of the auxiliary bearing seat 85 in the first specific implementation manner, the pulley structure 9 adopted in the second specific implementation manner can reduce the radial resistance, prevent rotation, and maintain the stability of the loading force.

[0038] Please refer to Figures 1 to 4 , a plurality of columns 2 and several main beams 3 are provided on the tabletop 1. In the specific implementation manner, a total of four columns 2 and two main beams 3 are provided on the test platform 1. Please refer to Figure 2 and Figure 3, in the test device 100 of the present utility model, there can also be multiple bearings 4 to be tested, specifically four. Since the first driving mechanism 7 includes two output ends 70 arranged in opposite directions to drive the two main beams 3 to rotate for synchronously testing multiple bearings 4 to be tested, one of the main beams 3 is horizontally arranged on two of the columns 2 and is connected to one output end 70 of the first driving mechanism 7; the other main beam 3 is horizontally arranged on the other two columns 2 and is connected to the other output end 70 of the first driving mechanism 7. A bearing 4 to be tested is arranged between each main beam 3 and each corresponding column 2 connected thereto. That is: in the specific implementation manner, the first driving mechanism 7 of the test device 100 of the present utility model has two output ends arranged in opposite directions, one output end is connected to the main beam 3 on the left side and the other output end is connected to the main beam 3 on the right side. With such a setting, the test device 100 of the present utility model can synchronously drive the two main beams 3 to rotate through the first driving mechanism 7. For example: in the specific implementation manner, each main beam 3 is horizontally arranged on two columns 2, and the test device 100 of the present utility model can test multiple (specifically four) bearings 4 to be tested at one time, improving the test efficiency.

[0039] Please refer to Figures 1 to 12 , each main beam 3 is correspondingly provided with a set of elastic loading components 8. In the specific implementation manner, a total of six elastic loading components 8 are provided on the test platform 1. The six elastic loading components 8 are divided into two groups. Each group of elastic loading components 8 includes two outer elastic loading components 801 connected to the corresponding two ends of one main beam 3 and one intermediate elastic loading component 802 connected to the corresponding middle part of this main beam 3. The load force of the intermediate elastic loading component 802 is greater than the load forces of the two corresponding outer elastic loading components 801. The difference in the load force magnitudes is mainly because there are multiple bearings 4 to be tested at one end of the speed reducer in the present utility model. The load in the middle exerts forces on the bearings 4 to be tested on both sides, and the one at the end only exerts a force on the corresponding bearing 4 to be tested, so the force values are different.

[0040] Please refer to Figure 7 and Figure 8 , the test device 100 of the present utility model further includes a universal joint 6. The output end 70 of the first driving mechanism 7 is connected to the main beam 3 through the universal joint 6. Each output end 70 is connected to a universal joint 6 to conveniently and flexibly adjust the installation and rotation angle between the main beam 3 and the output end 70, so as to be applicable to different photovoltaic projects and connect to main beams 3 of different specifications. In the specific implementation manner, please refer to Figure 8, the universal joint 6 is a three-section type. The universal joint 6 includes a first section 61, a second section 62, and a third section 63 connected in sequence. The first section 61 is connected to the output end 70 of the first driving mechanism 7. Opposite ends of the second section 62 are respectively connected to the first section 61 and the third section 63 in a universal joint manner. The third section 63 is connected to the main beam 3. By adjusting the rotation angle between the first section 61 and the second section 62 and / or the rotation angle between the second section 62 and the third section 63, the installation angle of the main beam 3 in different installation environments can be adjusted to adapt.

[0041] Please refer to Figures 3 to 5 , at the bottom of each column 2, there is an installation base 21. The column 2 is detachably and fixedly connected to the test platform 1 through the installation base 21. The installation base 21 is provided with a first adjustment hole 201 extending in the first direction to adjust the installation distance between two adjacent columns 2. At the top of each column 2, there is an installation top seat 22. First, the main bearing seat 5 is fixed to the installation top seat 22 as a whole by welding or screwing, etc., and then is fixedly connected to the column 2 through the installation top seat 22. The installation top seat 22 or the column 2 is provided with a plurality of second adjustment holes 202 arranged in the second direction to adjust the installation height of the main beam 3 on each column 2. In the specific implementation manner, the second direction is Figure 1 the up-and-down direction shown, and the first direction is the left-right direction or the front-back direction perpendicular to the second direction.

[0042] Please refer to Figure 5 , in the specific implementation manner, the first adjustment hole 201 is an oval hole. Therefore, the length of the oval hole itself can meet the offset distance of a certain length between adjacent columns, for example, an offset distance of 15 mm in the left-right direction or the front-back direction. Please refer to Figure 3 and Figure 4 , in the specific implementation manner, the second adjustment hole 202 is a round hole. There is one second adjustment hole 202 on the installation top seat 22. Correspondingly, there is a row of second adjustment holes 202 in the up-and-down direction on the column 2. The bolt 10 correspondingly passes through this second adjustment hole 202 on the installation top seat 22 and one of the row of second adjustment holes 202 on the column 2; alternatively, there is one second adjustment hole 202 on the column 2. Correspondingly, there is a row of second adjustment holes 202 in the up-and-down direction on the installation top seat 22. The bolt 10 correspondingly passes through this second adjustment hole 202 on the column 2 and one of the row of second adjustment holes 202 on the installation top seat 22; or, there is a row of second adjustment holes 202 on both the column 2 and the installation top seat 22. That is to say, it is not limited whether the multiple second adjustment holes 202 are provided on the installation top seat 22 and the column 2. As long as the installation top seat 22 or the column 2 is provided with a plurality of second adjustment holes 202 arranged in the second direction, they can be locked with different hole positions through the bolt 10 to meet the adjustment in the height direction.

[0043] The main bearing seat 5 is fixed to the upper end of the column 2 and sleeved outside the bearing under test 4. Further, a funnel (not shown) is provided above the bearing under test 4 in the test device 100 of the present utility model. An opening (not shown) is correspondingly provided on the main bearing seat 5. The funnel sprays water and / or sand from the opening to the bearing under test 4 to simulate the wind sand and rain in the actual harsh environment. Correspondingly, a water receiving tray (not shown) is provided on the column 2 below the bearing under test 4 in the test device 100 of the present utility model to effectively catch the water and sand and protect components such as the motor. A torsion sensing element (not shown) is provided on the main beam 3 to monitor the rotation angle of the main beam 3. When the rotation angle of the main beam 3 exceeds the safe range, the control console controls the first driving mechanism 7 to stop rotating to ensure the safe operation of the test device 100. In the specific implementation manner, the torsion sensing element can be an inclination sensor or a level gauge.

[0044] In summary, the test device 100 of the present utility model can simulate the complex and changeable axial pressure under harsh environments to test the bearing under test 4 by setting the elastic loading component 8. One end of the elastic loading component 8 is fixed on the test platform 1 and the other end is connected to the main beam 3 to make the main beam 3 in a variable load state. The main beam 3 rotates under the driving action of the first driving mechanism 7 in the variable load state. Therefore, the bearing under test 4 that passes the test by the test device 100 of the present utility model can meet the installation requirements of the photovoltaic bracket in harsh environments.

[0045] The above embodiments are only used to illustrate the present utility model and do not limit the technical solutions described in the present utility model. The understanding of the present utility model should be based on those skilled in the art of the relevant technical field. Although this specification has described the present utility model in detail with reference to the above embodiments, those of ordinary skill in the art should understand that those skilled in the relevant technical field can still modify or equivalently replace the present utility model. All technical solutions and their improvements that do not depart from the spirit and scope of the present utility model should be covered within the scope of the claims of the present utility model.

Claims

1. A testing device (100) for performing a wear resistance test on a bearing (4) to be tested, characterized in that: The invention comprises a test platform (1), a column (2), a main beam (3), a main bearing seat (5), a first driving mechanism (7) and an elastic loading component (8), wherein the lower end of the column (2) is fixed on the test platform (1), the main bearing seat (5) is fixed on the upper end of the column (2) and is used to be sleeved outside the bearing to be tested (4), the main beam (3) is transversely arranged on the column (2) and is used to be inserted into the bearing to be tested (4), and the output end (70) of the first driving mechanism (7) is connected to the main beam (3); the elastic loading component (8) 8) is fixed on the test platform (1) and connected to the main beam (3), providing a variety of different loading forces for the main beam (3), and the main beam (3) rotates under the driving action of the first driving mechanism (7); the elastic loading component (8) includes a second driving mechanism (81), a lifting mechanism (82) and an elastic member (83), the second driving mechanism (81) adjusts the elastic force of the elastic member (83) through the lifting mechanism (82), and the elastic member (83) is respectively connected to the lifting mechanism (82) and the main beam (3).

2. The testing device (100) according to claim 1, characterized in that: The lifting mechanism (82) comprises a seat body (821) and a screw rod (822); the seat body (821) is fixed on the test platform (1); the second driving mechanism (81) is capable of driving the screw rod (822) to extend upward and / or retract downward relative to the seat body (821); the upper end of the elastic member (83) is connected to the main beam (3); and the lower end of the elastic member (83) is connected to the top of the screw rod (822).

3. The testing device (100) according to claim 2, characterized in that: The elastic loading assembly (8) also includes a sensing element (84) for sensing the load force, the sensing element (84) is positioned at the top of the screw rod (822) and a second annular member (820) is also provided at the top of the screw rod (822), the opposite ends of the elastic deformation of the elastic member (83) are respectively provided with a first hook portion (831) located at the top and a second hook portion (832) located at the bottom, and the second annular member (820) is connected to the second hook portion (832) below the elastic member (83).

4. The testing device (100) according to claim 3, characterized in that: The elastic loading assembly (8) also includes an auxiliary bearing seat (85) sleeved on the main beam (3), and a first annular member (850) is provided at the bottom of the auxiliary bearing seat (85), so that a first hook (831) above the elastic member (83) is connected to the first annular member (850) of the auxiliary bearing seat (85) to achieve a connection and fixation between the upper end of the elastic member (83) and the main beam (3).

5. The testing device (100) according to claim 3, characterized in that: The elastic loading assembly (8) also includes a pulley structure (9), the pulley structure (9) includes a pulley (91) and an auxiliary bearing (92), the auxiliary bearing (92) is sleeved on the main beam (3) and located in the pulley (91), a steel wire rope (103) is arranged on the pulley (91), and a first hook (831) above the elastic member (83) is connected to the steel wire rope (103).

6. The testing device (100) according to any one of claims 1 to 5, characterized in that: The test platform (1) is provided with a plurality of columns (2) and a plurality of main beams (3), wherein one of the main beams (3) is horizontally arranged on two of the columns (2), a bearing (4) to be tested is arranged between the main beam (3) and each of the columns (2) connected thereto, and each of the main beams (3) is correspondingly provided with a group of elastic loading components (8). Each group of the elastic loading components (8) comprises two outer elastic loading components (801) connected to two corresponding ends of a main beam (3) and an intermediate elastic loading component (802) connected to the corresponding middle part of the main beam (3), and the load force of the intermediate elastic loading component (802) is greater than the load force of the corresponding two outer elastic loading components (801).

7. The testing device (100) according to claim 6, characterized in that: The invention also comprises a universal joint (6), wherein the output end (70) of the first driving mechanism (7) is connected to the main beam (3) via the universal joint (6), wherein the universal joint (6) comprises a first section (61), a second section (62) and a third section (63) connected in sequence, wherein the first section (61) is connected to the output end (70) of the first driving mechanism (7), and the opposite ends of the second section (62) are universally connected to the first section (61) and the third section (63), respectively, and the third section (63) is connected to the main beam (3).

8. The testing device (100) according to claim 6, characterized in that: A mounting base (21) is provided at the bottom of each of the columns (2), and the mounting base (21) is provided with a first adjustment hole (201) extending in a first direction so as to adjust the mounting distance between two adjacent columns (2); and / or, A mounting seat (22) is provided at the top of each of the columns (2); the mounting seat (22) or the column (2) is provided with a plurality of second adjustment holes (202) arranged in a second direction so as to adjust the mounting height of the main beam (3) on each of the columns (2).

9. The testing device (100) according to claim 1, characterized in that: The testing device (100) is provided with a funnel above the bearing to be tested (4) and a water receiving tray below the bearing to be tested (4), and a torsion sensing element is provided on the main beam (3).

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