Grease lubricated pseudo-cloth indentation and fretting wear bearing testing machine

Abstract

The present application relates to a grease-lubricated pseudo-cloth indentation and micro-abrasion bearing testing machine, comprising: a mounting frame; a driving mechanism, comprising a driving motor and a parallel transmission assembly, the driving motor being arranged on the mounting frame, the parallel transmission assembly being connected in parallel to the output end of the driving motor and the swing ring of the bearing to be tested; a testing mechanism, being arranged on the mounting frame and used to install the fixing ring of the bearing to be tested; and a loading mechanism, being arranged on the mounting frame and loading the testing mechanism; the driving motor drives the parallel transmission assembly to drive the bearing to be tested to swing back and forth in the testing mechanism. The parallel transmission assembly adopts a parallel transmission method to connect the bearing to be tested in the testing mechanism, so as to accurately transmit torque under swinging conditions without generating additional axial force or normal force, and thus without generating structural impact force. In this way, there is no need to set a support body to balance the additional force, thereby simplifying the structural complexity and control difficulty of the driving mechanism, improving the test accuracy and repeatability, and ensuring the accuracy of the test results.

Description

Technical Field

[0001] The present application relates to the technical field of testing devices, and in particular to a grease-lubricated pseudo-cloth indentation and micro-abrasion bearing testing machine. Background Art

[0002] Large slewing bearings mainly operate under low-speed, heavy-load conditions, bearing large loads and torques. They are widely used in heavy machinery, tower cranes, wind turbines, solar generators, turrets, radar systems, etc. Grease is generally used as the internal lubrication medium of the bearings.

[0003] Currently, the development and production technology for large slewing bearings is relatively mature, with supply exceeding demand in both domestic and international markets. Extending service life, improving performance, and reducing operation and maintenance costs have become the most important core competitive advantages for these products. For example, in the wind power industry, high-power and ultra-high-power wind turbines are the future mainstream development direction. Consequently, blade size will continue to increase, and wind turbine structures will become more compact. This creates an urgent need to improve the service life and service reliability of yaw and pitch bearings (typical large slewing bearings).

[0004] However, the current situation is that there is very limited room for further improving bearing performance and reducing production costs from the material and structural perspectives. Major bearing manufacturers, and even OEMs, are focusing their attention on the selection of matching greases. Therefore, improving grease's wear resistance and friction reduction properties has become a key battleground for lubricant suppliers. When evaluating the performance of grease lubrication in large slewing bearings under low-speed and heavy-load conditions, a key metric is resistance to fretting corrosion. Fretting corrosion is one of the most common failure modes in large slewing bearings, potentially causing severe cracking, oxidation, fatigue spalling, and ultimately accidents.

[0005] Currently, when evaluating micro-abrasion performance, the connection between the test system's drive shaft and the test mechanism is a single-axis connection, which results in structural impact forces and requires additional mechanical structures for balancing. This complex structure introduces additional power consumption, hindering the achievement of high-precision, high-frequency reciprocating control. Furthermore, the test system's test results are not highly repeatable, likely due to the structural design, and the accuracy of the test results cannot be guaranteed. Summary of the Invention

[0006] Based on this, it is necessary to provide a grease-lubricated pseudo-cloth indentation and micro-abrasion bearing testing machine to address the problem that the current test system uses a single-axis drive shaft, which requires additional support when testing the bearing to be tested, resulting in complex structure and poor repeatability. The machine does not require a support body to balance the additional force, simplifies the structural complexity and control difficulty, and thus improves the test accuracy and repeatability, which is conducive to achieving high-frequency reciprocating control of the bearing to be tested, thereby ensuring the accuracy of the test results.

[0007] A grease lubricated pseudo-cloth indentation and fretting abrasion bearing testing machine, comprising:

[0008] Install the rack;

[0009] The driving mechanism includes a driving motor and a parallel transmission assembly, wherein the driving motor is provided on the mounting frame, and the parallel transmission assembly is connected in parallel to the output end of the driving motor and the swing ring of the bearing to be tested;

[0010] a testing mechanism, provided on the mounting frame and used for mounting the fixing ring of the bearing to be tested; and

[0011] a loading mechanism, provided on the mounting frame and configured to load the testing mechanism;

[0012] The driving motor drives the parallel transmission assembly to drive the bearing to be tested to swing back and forth in the testing mechanism.

[0013] In one embodiment of the present application, the parallel transmission assembly includes an output rod, a swing rod, and two transmission rods, wherein the swing rod is used to fix the swing ring of the bearing to be tested, and the fixed ring of the bearing to be tested is fixed in the testing mechanism;

[0014] The two transmission rods are arranged in parallel, the output rod is provided at the output end of the drive motor, the swing rod is arranged in parallel with the output rod, and the output rod and the swing rod are rotatably connected to the two transmission rods respectively, so that the parallel transmission assembly is a parallelogram.

[0015] In one embodiment of the present application, the swing lever comprises a fixed body and two connecting portions, wherein the two connecting portions are symmetrically arranged on both sides of the fixed body and are rotatably connected to the two transmission levers respectively;

[0016] The parallel transmission assembly further includes a first adapter, a second adapter and a rotating member, wherein the first adapter is arranged at the connecting portion, the second adapter is arranged at the end of the transmission rod, and the rotating member can rotatably connect the first adapter and the second adapter; or, the parallel transmission assembly further includes a hinged member, which hinges the connecting portion and the transmission rod.

[0017] In one embodiment of the present application, the number of the testing mechanisms is two and they are symmetrically arranged on the mounting frame. The parallel transmission assembly includes two swinging rods. The output rod is rotatably arranged in the middle area of the transmission rod. The two ends of the two transmission rods are respectively connected to the two swinging rods. The two swinging rods and the two transmission rods are arranged to form a parallelogram.

[0018] And / or, the transmission rod comprises a plurality of connecting rods, and the plurality of connecting rods are connected in series to form the transmission rod.

[0019] In one embodiment of the present application, the testing mechanism includes a support shaft and a fixed seat, the support shaft is arranged on the mounting frame and extends through the swing arm, the fixed seat is fixed to the support shaft and is located on the side of the swing arm, the fixing ring is installed in the fixed seat, and the swing ring is installed in the swing arm.

[0020] In one embodiment of the present application, the testing mechanism further comprises a clamping and centering assembly, the clamping and centering assembly comprising a plurality of clamping members and a mounting ring, the mounting ring being disposed on the fixing seat;

[0021] The plurality of clamping members are evenly distributed along the circumference of the mounting ring, and each clamping member is movably arranged in the mounting ring along the radial direction and can abut against the outer wall of the fixed ring of the bearing to be tested.

[0022] In one embodiment of the present application, there are two fixing seats, which are located on both sides of the swinging rod, and one bearing to be tested is installed in each fixing seat;

[0023] And / or, the testing mechanism further comprises a support member, wherein the support member is sleeved on the support shaft and supported between the fixing seat and the mounting frame;

[0024] And / or, the testing mechanism also includes a testing shell, which is arranged on the mounting frame and covers the support shaft and the fixed seat. The testing shell includes a testing base and a testing cover. The testing base is arranged on the mounting frame, and the testing cover is arranged on the testing base to enclose a testing space. The fixed seat, the swing arm and the bearing to be tested are located in the testing space.

[0025] In one embodiment of the present application, the grease-lubricated pseudo-cloth indentation and fretting wear bearing testing machine further comprises a temperature control mechanism, which is used to control the temperature of the bearing to be tested;

[0026] The temperature control mechanism includes a temperature control cabinet and a heat exchange component connected to the temperature control cabinet, each heat exchange component corresponds to a fixing seat, and the temperature control cabinet can control the heat exchange temperature of the heat exchange component so that the heat exchange component and the fixing seat exchange heat;

[0027] The heat exchange component includes a circulation pipeline, a control valve and a heat exchange coil, the heat exchange coil is arranged on the fixed seat, the circulation pipeline connects the temperature control cabinet and the heat exchange coil, and the control valve is arranged on the circulation pipeline; and / or, the temperature control mechanism also includes a temperature sensor, and the temperature sensor is arranged on the fixed seat.

[0028] In one embodiment of the present application, the loading mechanism includes a loading member connected to the support shaft to load the support shaft;

[0029] The loading member is a disc spring, and the loading member is sleeved on the support shaft. The loading mechanism also includes a loading wrench and a torque sensor. The loading wrench is arranged on the top of the support shaft, and the torque sensor is arranged on the support shaft. The loading wrench drives the support shaft to rotate relative to the mounting frame to load the loading member, and the load of the loading member is monitored by the torque sensor.

[0030] Alternatively, the loading member is a hydraulic cylinder, a pneumatic cylinder or a weight.

[0031] In one embodiment of the present application, the mounting frame includes a frame body and a protective cover, the driving mechanism, the testing mechanism, and the loading mechanism are provided on the frame body, the driving motor is provided on the frame body in a vertical direction, and is located on both sides of the frame body together with the parallel transmission assembly, the protective cover covers the parallel transmission assembly and the testing mechanism, and the protective cover has a switch cover that can be opened or closed, and the switch cover is provided corresponding to the testing mechanism;

[0032] And / or, the grease-lubricated pseudo-cloth indentation and micro-abrasion bearing testing machine further includes an operating table, the operating table is provided with a host computer, and the host computer is connected to the drive motor.

[0033] After adopting the above technical solution, this application has at least the following technical effects:

[0034] The grease-lubricated pseudo-cloth indentation and micro-abrasion bearing testing machine of the present application comprises a drive motor of a drive mechanism disposed on a mounting frame, a parallel transmission assembly connecting the output end of the drive motor in parallel with the swing ring of the bearing to be tested, a test mechanism disposed on the mounting frame, a fixed ring of the bearing to be tested disposed in the test mechanism, and a loading mechanism disposed on the mounting frame to load the test mechanism and, in turn, the bearing to be tested in the test mechanism. When the bearing to be tested is tested, the drive motor drives the parallel transmission assembly to cause the swing ring of the bearing to be tested to swing back and forth relative to the fixed ring in the test mechanism.

[0035] This grease-lubricated pseudo-indentation and micro-abrasion bearing testing machine uses a parallel transmission assembly to transmit the reciprocating motion of the drive motor to the bearing under test in the test mechanism, driving the swing ring of the test bearing to oscillate back and forth relative to the fixed ring, thereby testing the grease lubrication performance of the test bearing. The parallel transmission assembly connects the test bearing in the test mechanism using a parallel transmission method. This can accurately transmit torque under oscillating conditions without generating additional axial or normal forces, thereby preventing structural impact on the parallel transmission assembly. This eliminates the need for a support to balance additional forces, simplifies the structural complexity and control difficulty of the drive mechanism, improves the efficiency of the drive motor, and thus enhances test accuracy and repeatability. This facilitates high-frequency reciprocating control of the test bearing, thereby ensuring the accuracy of the test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 This is a three-dimensional diagram of a grease-lubricated pseudo-cloth indentation and fretting wear bearing testing machine according to an embodiment of the present application.

[0037] Figure 2 for Figure 1 The schematic diagram of the grease-lubricated pseudo-cloth indentation and fretting wear bearing testing machine is shown without the test housing and protective cover.

[0038] Figure 3 for Figure 2 Schematic diagram of the test housing retained on one side in the grease-lubricated pseudo-cloth indentation and fretting wear bearing testing machine shown.

[0039] Figure 4 for Figure 2 The three-dimensional diagram of the drive mechanism in the grease-lubricated pseudo-cloth indentation and fretting wear bearing testing machine is shown.

[0040] Figure 5 for Figure 4 A top view of the drive mechanism is shown.

[0041] Figure 6 for Figure 3 A cross-sectional view of the grease-lubricated pseudo-cloth indentation and fretting wear bearing testing machine at the testing mechanism is shown.

[0042] Figure 7 for Figure 6 The exploded view of the test structure shown is shown with the test housing removed.

[0043] Figure 8 for Figure 7 Schematic diagram of the clamping and centering assembly in the test mechanism shown being arranged on a fixed seat.

[0044] Wherein: 10, grease-lubricated pseudo-cloth indentation and fretting wear bearing testing machine; 100, mounting frame; 110, frame body; 120, protective cover; 121, switch cover; 200, driving mechanism; 210, driving motor; 220, parallel transmission assembly; 221, transmission rod; 222, output rod; 223, swing rod; 2231, fixed body; 2232, connecting part; 224, first adapter; 225, second adapter; 226, rotating member; 300, testing mechanism; 310, supporting shaft; 320, fixing seat; 330, clamping and centering assembly; 331, Clamping part; 332, mounting ring; 340, support part; 350, test housing; 351, test cover; 352, test base; 353, test space; 400, loading mechanism; 410, disc spring; 420, loading wrench; 430, torque sensor; 440, blocking part; 450, loading housing; 500, temperature control mechanism; 510, temperature control cabinet; 520, heat exchange component; 521, circulation pipeline; 522, heat exchange coil; 523, control valve; 600, operating table; 70, bearing to be tested; 701, swing ring; 702, fixing ring; 703, rolling element. DETAILED DESCRIPTION

[0045] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0046] In the description of this application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0047] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of this application, if the term "plurality" appears, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0048] In this application, unless otherwise specified or limited, the terms "mounted," "connected," "connected," "fixed," etc., should be interpreted broadly. For example, these terms may refer to fixed connections, removable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediary; and internal communication between two components or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0049] In this application, unless otherwise expressly specified or limited, if a first feature is described as being "above" or "below" a second feature, or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above," "above," and "above" the second feature may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. The first feature being "below," "below," and "below" the second feature may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0050] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only embodiment.

[0051] Understandably, large slewing bearings primarily operate under low-speed, heavy-load conditions, bearing significant loads and torque. Grease is typically used as the internal lubricant for these bearings. A key metric for evaluating the grease lubrication performance of large slewing bearings under these conditions is their resistance to fretting corrosion. Current testing systems for evaluating bearing fretting corrosion resistance use a single-axis connection between the drive shaft and the test mechanism. This creates structural impact forces and requires additional mechanical balancing, resulting in a complex structure. Furthermore, the test results from these systems are not highly repeatable, making the accuracy of the results difficult to guarantee.

[0052] See also Figure 1 and Figure 2 To this end, the present application provides a novel grease-lubricated pseudo-cloth indentation and micro-abrasion bearing testing machine 10. Figure 1 This is a three-dimensional diagram of a grease-lubricated pseudo-cloth indentation and fretting wear bearing testing machine 10 according to an embodiment of the present application. Figure 2 for Figure 1 The schematic diagram of the grease-lubricated pseudo-fabric indentation and fretting wear tester 10 shown here is excluding the test housing 350 and protective cover 120. This grease-lubricated pseudo-fabric indentation and fretting wear tester 10 is capable of testing the grease lubrication performance of a bearing 70 to be tested, thereby evaluating the anti-fretting wear performance and pseudo-fabric indentation of the bearing 70 when lubricated with grease, thereby evaluating the performance of the grease to meet requirements such as the service life and reliability of the bearing 70 to be tested. Of course, in other embodiments of the present application, this grease-lubricated pseudo-fabric indentation and fretting wear tester 10 can also evaluate other properties of the grease, which will not be detailed here.

[0053] The grease-lubricated pseudo-indentation and fretting bearing testing machine 10 can accurately transmit torque during the test without generating additional axial or normal forces, and thus without generating structural impact forces. This eliminates the need for a support to balance additional forces, simplifies structural complexity and control difficulty, and thus improves test accuracy and repeatability. This facilitates high-frequency reciprocating control of the bearing 70 under test, thereby ensuring the accuracy of the test results. The following describes the specific structure of the grease-lubricated pseudo-indentation and fretting bearing testing machine 10 according to one embodiment.

[0054] The grease-lubricated pseudo-cloth indentation and micro-abrasion bearing testing machine 10 is capable of testing a bearing 70 to be tested. The bearing 70 to be tested here includes, but is not limited to, thrust bearings, and can also be other types of bearings. The structure of the bearing 70 to be tested is first described here. The bearing 70 to be tested includes two shaft seats and a plurality of rolling elements 703. The plurality of rolling elements 703 are disposed between the two shaft seats. The two shaft seats are a swinging ring 701 and a fixed ring 702. The swinging ring 701 is swingable, while the fixed ring 702 is stationary. When the swinging ring 701 swings, it can drive the rolling elements 703 to move synchronously. The fixed ring 702 does not move with the swinging ring 701 and the rolling elements 703. During the test, the bearing 70 to be tested is arranged in a vertical direction. The upper shaft seat can be the swinging ring 701 and the lower shaft seat can be the fixed ring 702, or the upper shaft seat can be the fixed ring 702 and the lower shaft seat can be the swinging ring 701.

[0055] A certain amount of grease (test sample) is filled into the bearing 70 to be tested. The grease-lubricated pseudo-indentation and fretting wear tester 10 of this application provides test conditions for the bearing 70 to be tested. Under certain load, temperature, and frequency conditions, the swing ring 701 of the bearing 70 can reciprocate at a certain angle to produce fretting wear (even very slight wear may manifest as pseudo-indentation). The mass loss of the bearing 70 to be tested before and after the weighing test is compared to quantitatively evaluate the fretting wear and determine the grease's anti-fretting wear performance in the bearing 70 to be tested.

[0056] See also Figures 1 to 3 In one embodiment, a grease-lubricated pseudo-cloth indentation and micro-wear bearing testing machine 10 includes a mounting frame 100, a drive mechanism 200, a testing mechanism 300, and a loading mechanism 400. The driving mechanism 200 includes a driving motor 210 and a parallel transmission assembly 220. The driving motor 210 is disposed on the mounting frame 100. The parallel transmission assembly 220 connects the output end of the driving motor 210 to the swing ring 701 of the bearing to be tested 70 in parallel. The testing mechanism 300 is disposed on the mounting frame 100 and is used to mount a fixing ring 702 of the bearing to be tested 70. The loading mechanism 400 is disposed on the mounting frame 100 and loads the testing mechanism 300. The driving motor 210 drives the parallel transmission assembly 220 to cause the bearing to be tested 70 to swing back and forth in the testing mechanism 300. Figure 3 for Figure 2 The schematic diagram of the test housing 350 on one side of the grease lubricated pseudo-cloth indentation and fretting wear bearing testing machine 10 is shown.

[0057] The mounting frame 100 supports the grease-lubricated pseudo-fabric indentation and fretting bearing testing machine 10. Each mechanism within the grease-lubricated pseudo-fabric indentation and fretting bearing testing machine 10 is housed within the mounting frame 100. The mounting frame 100 supports each mechanism within the grease-lubricated pseudo-fabric indentation and fretting bearing testing machine 10, ensuring stable operation. The drive mechanism 200 is the power component of the grease-lubricated pseudo-fabric indentation and fretting bearing testing machine 10. The drive mechanism 200 is capable of outputting a reciprocating oscillating motion to drive the oscillating ring 701 of the bearing 70 to be tested to oscillate back and forth, thereby performing a grease lubrication performance test on the bearing 70 to be tested.

[0058] The testing mechanism 300 is arranged on the mounting frame 100 and is located on the side of the driving mechanism 200. The bearing to be tested 70 is located in the testing mechanism 300. The loading mechanism 400 is also arranged on the mounting frame 100. The loading mechanism 400 is connected to the testing mechanism 300. The loading mechanism 400 can load the testing mechanism 300, and then load the bearing to be tested 70 in the testing mechanism 300. In this way, the bearing to be tested 70 can swing back and forth under the load of the loading mechanism 400 to simulate the grease lubrication performance of the bearing to be tested 70 under the loading condition, thereby obtaining the anti-micro-abrasion performance of the bearing to be tested 70, so as to obtain the wear resistance and friction reduction performance of the grease used for the bearing to be tested 70.

[0059] The loading mechanism 400 can apply different loads to the test mechanism 300 and the bearing under test 70 to simulate the grease lubrication performance of the bearing under test 70 under different load conditions. Furthermore, the drive mechanism 200 is connected to the swing ring 701 of the bearing under test 70, and the fixed ring 702 of the bearing under test 70 is installed in the test mechanism 300. The swing ring 701 and the fixed ring 702 are supported by rolling elements 703. When the drive mechanism 200 outputs a reciprocating swinging motion, it can drive the swing ring 701 to reciprocate relative to the fixed ring 702 and the test mechanism 300 via the rolling elements 703.

[0060] Specifically, the drive mechanism 200 includes a drive motor 210 and a parallel transmission assembly 220. The parallel transmission assembly 220 is located at the output end of the drive motor 210. The parallel transmission assembly 220 is also located in the testing mechanism 300 and is mounted on the swing ring 701 of the bearing 70 to be tested. As can be understood, the parallel transmission assembly 220 is a parallelogram transmission structure. The drive motor 210 is located on the mounting frame 100. The output end of the drive motor 210 drives the parallel transmission assembly 220 to perform parallel motion. When one side of the parallel transmission assembly 220 transmits the applied force to the bearing 70 to be tested, the other side can transmit the applied force back to the drive motor 210.

[0061] Thus, when the drive motor 210 outputs a reciprocating swinging motion, the drive motor 210 can drive the parallel transmission assembly 220 to move, and the parallel transmission assembly 220 can then drive the swing ring 701 of the bearing under test 70 to swing back and forth relative to the fixed ring 702. Furthermore, the drive motor 210 transmits the applied force to the swing ring 701 of the bearing under test 70 via the parallel transmission assembly 220. Simultaneously, the applied force can be transmitted back to the drive motor 210 due to the parallel arrangement, thereby maintaining a force-balanced state on the bearing under test 70.

[0062] As the drive motor 210 drives the parallel transmission assembly 220 to cause the bearing 70 under test to oscillate back and forth, the loading mechanism 400 applies load to the bearing 70 under test via the testing mechanism 300 to perform a grease lubrication performance test on the bearing 70 under test. Because the parallel transmission assembly 220 is balanced during force transmission, no additional axial or normal forces are generated. Consequently, the bearing 70 under test does not require additional support to parallel the additional force. This results in a simple and compact structure for the drive mechanism 200, eliminating the need to overcome additional friction or structural forces. This improves the efficiency of the drive motor 210 and significantly enhances the test accuracy and repeatability of the test results.

[0063] The grease-lubricated pseudo-fabric indentation and micro-abrasion bearing testing machine 10 of the above-described embodiment utilizes a parallel transmission assembly 220 to transmit the reciprocating motion of the drive motor 210 to the bearing 70 to be tested in the test mechanism 300, thereby driving the swing ring 701 of the bearing 70 to swing back and forth relative to the fixed ring 702, thereby performing a grease lubrication performance test of the bearing 70 to be tested. The parallel transmission assembly 220 utilizes a parallel transmission method to connect the bearing 70 to be tested in the test mechanism 300. This method enables precise transmission of torque under swinging conditions without generating additional axial or normal forces, thereby preventing structural impact forces on the parallel transmission assembly 220. This eliminates the need for a support body to balance the additional forces, simplifies the structural complexity and control difficulty of the drive mechanism 200, improves the efficiency of the drive motor 210, and thereby enhances test accuracy and repeatability. This facilitates high-frequency reciprocating control of the bearing 70 to be tested, thereby ensuring the accuracy of the test results.

[0064] See also Figures 1 to 3 Optionally, the drive motor 210 is a rotary motor that can output high-precision reciprocating swinging motion. Optionally, the drive motor 210 and the parallel transmission assembly 220 are separately arranged on both sides of the mounting frame 100. The drive motor 210 is located below the mounting frame 100, and the parallel transmission assembly 220 is located above the mounting frame 100. The output end of the drive motor 210 passes through the mounting frame 100 and is connected to the parallel transmission assembly 220. In this way, the drive motor 210 does not need to occupy space above the mounting frame 100, thereby reducing the overall height of the grease-lubricated pseudo-cloth indentation and micro-wear bearing testing machine 10.

[0065] See also Figures 1 to 3 Alternatively, the drive motor 210 is vertically disposed below the mounting frame 100, and the test mechanism 300 is located above the mounting frame 100 and to the side of the drive motor 210. The parallel transmission assembly 220 drives the bearing 70 to oscillate back and forth within the test mechanism 300. In other words, the drive motor 210 is vertically disposed and can provide high-frequency reciprocating oscillating motion around the Z-axis within the XY plane. This high-frequency reciprocating oscillating motion is transmitted to the bearing 70 to be tested via the parallel transmission assembly 220, enabling the bearing 70 to perform high-frequency reciprocating oscillating motion within the XY plane and around the Z-axis.

[0066] See also Figures 1 to 3 Alternatively, the loading mechanism 400 and the testing mechanism 300 are located on either side of the mounting frame 100, with the testing mechanism 300 located above the mounting frame 100 and the loading mechanism 400 located below the mounting frame 100 and connected to the testing mechanism 300. This allows for loading the testing mechanism 300 while also reducing the space occupied by the loading mechanism 400 above the mounting frame 100. Of course, in other embodiments of the present application, the loading mechanism 400 may also be located above the testing mechanism 300.

[0067] See also Figure 1 In one embodiment, the mounting frame 100 includes a frame body 110 and a protective cover 120. The drive mechanism 200, the testing mechanism 300, and the loading mechanism 400 are disposed on the frame body 110. The drive motor 210 is vertically disposed on the frame body 110 and is located on both sides of the frame body 110 along with the parallel transmission assembly 220. The protective cover 120 covers the parallel transmission assembly 220 and the testing mechanism 300. The frame body 110 is the main frame of the mounting frame 100 and supports the drive mechanism 200, the testing mechanism 300, and the loading mechanism 400. Optionally, the frame body 110 is a support platform. Of course, the frame body 110 can also be a frame structure or other structural form capable of providing support.

[0068] The drive motor 210 is disposed on the lower surface of the frame body 110 and is located in the space below the frame body 110. The parallel transmission assembly 220 is located above the frame body 110, and the output end of the drive motor 210 passes through the frame body 110 and is connected to the parallel transmission assembly 220. The testing mechanism 300 is disposed above the frame body 110, and the loading mechanism 400 is located below the frame body 110 and is mounted on the testing mechanism 300. The testing mechanism 300 and the loading mechanism 400 are located on the sides of the drive motor 210.

[0069] The protective cover 120 serves a protective function. Positioned above the main frame 110, the protective cover 120 covers the test mechanism 300 and the parallel transmission assembly 220. Protecting the parallel transmission assembly 220 and the test mechanism 300, the protective cover 120 prevents interference between other moving parts and the movement of the parallel transmission assembly 220, thereby ensuring stability during the test process. Furthermore, the protective cover 120 prevents dust and other debris from entering the test mechanism 300 and the parallel transmission assembly 220.

[0070] See also Figure 1 Optionally, the protective cover 120 has a switch cover 121 that can be opened or closed, and the switch cover 121 is provided corresponding to the test mechanism 300. The switch cover 121 can be rotatably provided on the protective cover 120 to rotatably open or close the switch cover 121. When the switch cover 121 is opened, the test mechanism 300 can be exposed, and operations such as loading or replacing the bearing 70 to be tested can be performed. When the switch cover 121 is closed, the test mechanism 300 can be shielded. Of course, in other embodiments of the present application, the switch cover 121 can also be slidably or other detachably provided on the protective cover 120.

[0071] Optionally, the number of switch covers 121 is equal to the number of test mechanisms 300. That is, each switch cover 121 corresponds to a test mechanism 300. Furthermore, the number of test mechanisms 300 is also equal to the number of loading mechanisms 400, with each test mechanism 300 corresponding to a loading mechanism 400. It is worth noting that the material and shape of the protective cover 120 are generally not limited, as long as the protective cover 120 can provide a protective function. Optionally, the protective cover 120 is secured to the frame body 110 using fasteners such as screws.

[0072] See also Figures 1 to 3 In one embodiment, the grease-lubricated pseudo-cloth indentation and micro-abrasion bearing testing machine 10 further includes an operating table 600, on which a host computer is provided, and the host computer is connected to the drive motor 210. The operating table 600 is a platform for the user to control the host computer. The host computer is placed on the operating table 600, and is used to operate the host computer from the side of the operating table 600, thereby realizing the control of each mechanism in the grease-lubricated pseudo-cloth indentation and micro-abrasion bearing testing machine 10. Optionally, the operating table 600 is independently provided with the mounting frame 100 and is located on the side of the mounting frame 100. Of course, in other embodiments of the present application, the operating table 600 and the mounting frame 100 may also be an integrated structure.

[0073] See also Figures 2 to 5In one embodiment, the parallel transmission assembly 220 includes an output rod 222, a swing rod 223 and two transmission rods 221. The swing rod 223 is used to fix the swing ring 701 of the bearing to be tested 70, and the fixed ring 702 of the bearing to be tested 70 is fixed in the testing mechanism 300; the two transmission rods 221 are arranged in parallel, the output rod 222 is provided at the output end of the driving motor 210, the swing rod 223 is arranged parallel to the output rod 222, and the output rod 222 and the swing rod 223 are respectively rotatably connected to the two transmission rods 221, so that the parallel transmission assembly 220 is a parallelogram. Figure 4 for Figure 2 The three-dimensional diagram of the drive mechanism 200 in the grease lubricated pseudo-cloth indentation and micro-wear bearing testing machine 10 is shown. Figure 5 for Figure 4 A top view of the drive mechanism 200 is shown.

[0074] The output rod 222 is located at the output end of the drive motor 210, while the swing rod 223 is mounted on the swing ring 701 of the bearing 70 to be tested. The output rod 222 and the swing rod 223 are arranged parallel to and spaced apart from each other. The two transmission rods 221 are also arranged parallel to and spaced apart from each other. The output rod 222 is rotatably connected to the two transmission rods 221 at both ends, while the swing rod 223 is also rotatably connected to the transmission rods 221 at both ends. The output rod 222, the swing rod 223, and the two transmission rods 221 are rotatably connected in sequence to form a parallelogram structure, giving the parallel transmission assembly 220 an overall parallelogram shape.

[0075] When the driving motor 210 outputs a swinging motion, the driving motor 210 can drive the output rod 222 to swing back and forth. When the output rod 222 moves, it can push a transmission rod 221 to drive the swing rod 223 and the swing ring 701 of the bearing to be tested 70 therein to rotate relative to the testing mechanism 300. At the same time, the swing rod 223 can push another transmission rod 221, so that when the output rod 222 moves, it can pull the transmission rod 221.

[0076] In this way, the parallel transmission assembly 220 achieves reciprocating motion transmission through two parallel transmission rods 221. The two transmission rods 221 can parallel the forces acting on the reciprocating swing of the bearing 70 under test and can provide stable support for the bearing 70 under test. In other words, a dual-axis connection is used between the drive motor 210 and the bearing 70 under test, and the two transmission rods 221 move in opposite directions to balance the forces acting on the bearing 70 under test.

[0077] In the present application, the transmission rod 221, the swing rod 223, and the output rod 222 are rotatably connected to form a parallelogram structure. This parallelogram design can achieve accurate torque transmission under swinging conditions without additional axial force or normal force. The power is directly applied to the middle bearing to be tested 70 through the transmission rod 221, the swing rod 223, the output rod 222 and the rotatable connection. The bearing to be tested 70 does not require an additional support body to balance the additional force. The structure is simple and compact, and there is no need to overcome additional friction or structural force, thereby improving the efficiency of the drive motor 210, and the test accuracy and repeatability are also greatly improved.

[0078] See also Figures 1 to 4 In one embodiment, there are two testing mechanisms 300, which are symmetrically arranged on the mounting frame 100. The parallel transmission assembly 220 includes two swinging rods 223. The output rod 222 is rotatably arranged in the middle area of the transmission rod 221. The two ends of the two transmission rods 221 are respectively connected to the two swinging rods 223. The two swinging rods 223 and the two transmission rods 221 are arranged to form a parallelogram.

[0079] The two test mechanisms 300 are symmetrically positioned on either side of the drive motor 210. The two ends of the parallel transmission assembly 220 extend into the two test mechanisms 300, respectively mounting the bearings 70 to be tested in the two test mechanisms 300. In other words, the drive motor 210 can be connected to the bearings 70 to be tested in both test mechanisms 300 via the parallel transmission assembly 220. Of course, in other embodiments of the present application, the parallel transmission assembly 220 can also be connected to the bearing 70 to be tested in only one test mechanism 300.

[0080] The transmission rod 221 is a long rod. The output rod 222 is located in the middle of the transmission rod 221 and is rotatably connected to the two transmission rods 221. Each end of the two transmission rods 221 is connected to a swing rod 223. Each swing rod 223 is located in a test mechanism 300 and is used to mount the corresponding bearing 70 to be tested in the test mechanism 300. The two swing rods 223 and the two transmission rods 221 form a parallelogram structure. The output rod 222 serves as the power output of the drive motor 210, driving the transmission rod 221 to cause the two swing rods 223 to swing back and forth.

[0081] In this way, the output rod 222 achieves reciprocating motion transmission via two parallel transmission rods 221. This parallelogram design enables precise torque transmission under swinging conditions without additional axial or normal forces. Power is directly applied to the bearing 70 to be tested, located between the swinging rods 223, via the transmission rods 221. The bearing 70 to be tested does not require additional support to balance the additional forces. It is worth noting that the principles of the two test mechanisms 300 are essentially the same as those of the single test mechanism 300. Furthermore, the structures of the two test mechanisms 300 are identical. Only one test mechanism 300 is described here.

[0082] In one embodiment, the drive mechanism 200 further includes an angle encoder located at the output of the drive motor 210. The angle encoder is used to capture the swing angle of the output motion of the drive motor 210. During the test, the angle encoder can monitor the swing angle of the swing motion output by the drive motor 210 in real time, precisely controlling the swing angles of the output rod 222, the transmission rod 221, and the swing rod 223, thereby controlling the swing angle of the bearing 70 under test with an error of less than 6%. Furthermore, after the test is completed, the swing angle data from the angle encoder can be exported to determine whether the swing of the bearing 70 under test was stuck during the test, thereby evaluating the grease lubrication performance of the bearing 70 under test.

[0083] Optionally, the drive motor 210 outputs a swing angle in the range of 3° to 6°. After the drive motor 210 outputs a swing motion within this swing angle range, it can drive the transmission rod 221 via the output rod 222 to cause the swing rod 223 and the swing ring 701 therein to swing back and forth. The swing ring 701 can then cause the rolling element 703 to fretting relative to the fixed ring 702, thereby evaluating the grease's anti-fretting abrasion performance under reciprocating swing conditions.

[0084] See also Figure 4 and Figure 5 In one embodiment, the output rod 222 is a parallelogram-shaped rod and is parallel to the swing rod 223. Of course, in other embodiments of the present application, the output rod 222 may also be a straight rod and arranged parallel to the swing rod 223. Optionally, the output rod 222 has first rotation holes at both ends, the transmission rod 221 has second rotation holes corresponding to the first rotation holes, and the parallel transmission assembly 220 further includes a rotating shaft that passes through the first rotation hole and is installed in the second rotation hole to achieve a rotatable connection between the output rod 222 and the transmission rod 221.

[0085] Optionally, the output rod 222 has a first connecting edge at each end, a first rotation hole is provided through the first connecting edge, the transmission rod 221 has a first mating plane, and the second rotation hole is provided on the first mating plane. The first mating plane aligns with the first connecting edge, making the first rotation hole and the second rotation hole coaxial for mounting the rotating shaft. Optionally, there are two first connecting edges, which are spaced apart to form a connecting groove. The second rotation hole extends through the transmission rod 221, and the portion of the transmission rod 221 that mates with the output rod 222 is located in the connecting groove, thereby ensuring the reliability of the rotational connection between the output rod 222 and the transmission rod 221.

[0086] See also Figure 4 and Figure 5 In one embodiment, the transmission rod 221 includes multiple connecting rods connected in series to form the transmission rod 221. Specifically, the connecting rods are short rods, and multiple connecting rods are fixedly connected in series to form a longer transmission rod 221. Motion transmission is achieved through the longer transmission rod 221. This reduces processing difficulty and cost, and facilitates molding.

[0087] See also Figure 4 and Figure 5 In one embodiment, the swing lever 223 includes a fixed body 2231 and two connecting portions 2232. The two connecting portions 2232 are symmetrically located on either side of the fixed body 2231 and are rotatably connected to the two transmission levers 221. The fixed body 2231 is the main component of the swing lever 223 that secures the swing ring 701 of the bearing 70 to be tested. The swing lever 223 has a fixing groove provided on the surface of the fixed body 2231. The swing ring 701 of the bearing 70 to be tested is mounted in the fixing groove.

[0088] The connecting portions 2232 are symmetrically disposed on either side of the fixed body 2231 and are similar in structure to the lugs of the swinging lever 223, providing a rotatable connection with the transmission lever 221. Optionally, the connecting portions 2232 and the fixed body 2231 are securely secured via a threaded connection or other means. Of course, in other embodiments of the present application, the connecting portions 2232 and the fixed body 2231 may also be integrally formed.

[0089] In one embodiment, the parallel transmission assembly 220 further includes a first adapter 224, a second adapter 225, and a rotating member 226. The first adapter 224 is disposed on the connecting portion 2232, the second adapter 225 is disposed at the end of the transmission rod 221, and the rotating member 226 rotatably connects the first adapter 224 and the second adapter 225. The first adapter 224 and the second adapter 225 are disposed perpendicularly, and the rotating member 226 passes through the first adapter 224 and the second adapter 225 to rotatably connect the first adapter 224 and the second adapter 225, thereby achieving a rotational connection between the transmission rod 221 and the swinging rod 223.

[0090] It is worth noting that the structural form of the first adapter 224 and the second adapter 225 is not limited in principle, as long as the first adapter 224 and the second adapter 225 can be rotatably connected through the rotating member 226. Optionally, the rotating member 226 is a rotating shaft or a rotating pin.

[0091] like Figure 4 and Figure 5 As shown, optionally, the first adapter 224 is arranged in a U-shape, and the U-shaped first adapter 224 is mounted on the connecting shaft. The second adapter 225 is arranged in a straight line, and one end of the second adapter 225 is arranged at the end of the transmission rod 221, and the other end extends into the U-shaped first adapter 224. The rotating member 226 can be rotatably inserted through the first adapter 224 and the second adapter 225. Optionally, the first adapter 224 and the second adapter 225 can also be flat-plate structures or structures similar to universal joints.

[0092] In another embodiment, the parallel transmission assembly 220 further includes a hinged member that hinges the transmission rod 221 and the connecting portion 2232. In other words, the hinged member directly passes through the ends of the transmission rod 221 and the connecting portion 2232, rotatably connecting the transmission rod 221 and the connecting portion 2232. This reduces the number of connecting portions 2232 between the swinging rod 223 and the transmission rod 221, thereby reducing friction.

[0093] Optionally, the end of the swinging lever 223 has a second connecting edge, the third rotation hole is provided in the second connecting edge, and the second connecting edge is provided in the connecting portion 2232. The end of the transmission lever 221 has a second mating plane, the fourth rotation hole is provided in the second mating plane, and the second connecting edge abuts the second mating plane, so that the third rotation hole and the fourth rotation hole are coaxial, thereby facilitating the installation of the hinge. Optionally, there are two second connecting edges, the two second connecting edges are spaced apart to form a connecting groove, the fourth rotation hole passes through the transmission lever 221, the end of the transmission lever 221 is located in the second connecting groove, and the hinge extends through one second connecting edge, the transmission lever 221, and the other second connecting edge, thereby ensuring the reliability of the rotational connection between the swinging lever 223 and the transmission lever 221.

[0094] Of course, in other embodiments of the present application, the transmission rod 221 and the swing rod 223 may also adopt other rotatable hinge connection methods, so that the transmission rod 221 can drive the swing rod 223 to perform reciprocating swinging motion.

[0095] See also Figure 2 、 Figure 3 、 Figure 6 and Figure 7In one embodiment, the testing mechanism 300 includes a support shaft 310 and a fixing base 320. The support shaft 310 is provided on the mounting frame 100 and extends through the swinging rod 223. The fixing base 320 is fixed to the support shaft 310 and is located on the side of the swinging rod 223. A fixing ring 702 is installed in the fixing base 320, and a swinging ring 701 is installed on the swinging rod 223. Figure 6 for Figure 3 The cross-sectional view of the grease lubricated pseudo-cloth indentation and fretting wear bearing testing machine 10 at the testing mechanism 300 is shown. Figure 7 for Figure 6 The test mechanism 300 is shown as an exploded schematic diagram with the test housing 350 removed.

[0096] A support shaft 310 is vertically mounted on the mounting frame 100 and arranged parallel to the drive motor 210. The support shaft 310 extends through the swinging lever 223. Furthermore, a fixed base 320 is also mounted on the mounting frame 100 and securely sleeved around the support shaft 310. The fixed base 320 and the swinging lever 223 are positioned opposite each other. The fixed ring 702 of the bearing 70 to be tested is mounted on the fixed base 320, while the swinging ring 701 is positioned within the swinging lever 223. When the drive motor 210 drives the transmission lever 221 to cause the swinging lever 223 to reciprocate, the swinging lever 223 drives the swinging ring 701 to reciprocate relative to the fixed ring 702 in the fixed base 320 via the rolling element 703.

[0097] It is worth noting that the structural form of the fixing base 320 is not limited in principle, as long as the fixing ring 702 can be fixedly installed in the fixing base 320. Optionally, the fixing base 320 is configured in a disc shape and has a recessed mounting groove therein, and the fixing ring 702 of the bearing 70 to be tested is fixedly installed in the fixing base 320.

[0098] See also Figure 2 、 Figure 3 、 Figure 6 and Figure 7 In one embodiment, two fixing seats 320 are provided, located on either side of the swinging member 223. A bearing 70 to be tested is mounted in each fixing seat 320. Specifically, the two fixing seats 320 are fixed to the support shaft 310, with one fixing seat 320 located above the swinging member 223 and one fixing seat 320 located below the swinging member 223. The upper fixing seat 320 cooperates with the swinging member 223 to mount a bearing 70 to be tested, while the lower fixing seat 320 cooperates with the swinging member 223 to mount a bearing 70 to be tested.

[0099] Specifically, the upper and lower surfaces of the swinging lever 223 are respectively provided with fixing grooves. The upper shaft seat (i.e., the fixing ring 702) of the upper bearing 70 to be tested is mounted in the upper fixing seat 320, and the lower shaft seat (i.e., the swinging ring 701) of the upper bearing 70 to be tested is mounted in the swinging lever 223. The lower shaft seat (i.e., the fixing ring 702) of the lower bearing 70 to be tested is mounted in the lower fixing seat 320, and the upper shaft seat (i.e., the swinging ring 701) of the lower bearing 70 to be tested is mounted in the swinging lever 223. In other words, the swinging lever 223 connects the shaft seats (i.e., the swinging ring 701) of the two bearings 70 to be tested, which are close to each other, at the middle.

[0100] When the transmission rod 221 drives the swing rod 223 to swing back and forth, the swing rod 223 can also drive the swing ring 701 of the upper and lower bearings 70 to swing back and forth. In this way, a single testing mechanism 300 can simultaneously perform grease lubrication tests on two bearings 70. Furthermore, by driving the swing rod 223 to swing back and forth on different bearing seats of the two bearings 70, a comparative test can be conducted to determine the fretting wear of the two bearings 70 after the test.

[0101] When two test mechanisms 300 are used to conduct grease lubrication tests, each test mechanism 300 can simultaneously accommodate two bearings 70 to be tested. Using two test mechanisms 300, four bearings 70 to be tested can be tested simultaneously, increasing the number of test samples. Furthermore, the bearings 70 to be tested in the two test mechanisms 300 can form a control group to determine the fretting wear of the bearings 70 to be tested on both sides.

[0102] See also Figures 6 to 8 In one embodiment, the testing mechanism 300 further includes a clamping and centering assembly 330 , which is disposed on the fixing seat 320 . The clamping and centering assembly 330 is capable of clamping the fixing ring 702 of the bearing 70 to be tested. Figure 8 for Figure 7 The diagram shows a clamping and centering assembly 330 mounted on a fixed base 320 in a test mechanism 300. The clamping and centering assembly 330 securely secures the fixed ring 702 of the bearing 70 to be tested to the fixed base 320. During testing, the fixed ring 702 does not move synchronously with the swinging ring 701 and rolling element 703, ensuring the accuracy of the test results.

[0103] At the same time, the clamping and centering assembly 330 also ensures that the fixed ring 702 and the swinging ring 701 are not eccentric, so that the central axes of the swinging ring 701 and the fixed ring 702 coincide. In this way, the drive motor 210 drives the swinging rod 223 via the transmission rod 221 to cause the swinging ring 701 of the bearing under test 70 to swing back and forth around the central axis of the fixed ring 702, ensuring the accuracy of the test results and avoiding inaccurate test results caused by eccentric wear, thereby ensuring test accuracy and repeatability.

[0104] See also Figures 6 to 8 In one embodiment, the clamping and centering assembly 330 includes a plurality of clamping members 331 and a mounting ring 332. The mounting ring 332 is mounted on the fixed seat 320. The plurality of clamping members 331 are evenly distributed along the circumference of the mounting ring 332. Each clamping member 331 is radially movable within the mounting ring 332 and can abut against the outer wall of the fixing ring 702 of the test bearing 70. The mounting ring 332 is fixedly mounted in a mounting groove of the fixed seat 320. The clamping members 331 are radially mounted on the mounting ring 332. The clamping members 331 can extend into or out of the inner side of the mounting ring 332 when moving radially.

[0105] After the fixing ring 702 is positioned within the mounting ring 332, the clamping members 331 radially extend into the mounting ring 332. At this point, the ends of the clamping members 331 can abut the outer wall of the fixing ring 702. In this manner, with multiple clamping members 331 abutting the outer wall of the fixing ring 702, the fixing ring 702 of the bearing under test 70 can be secured to the fixing seat 320, ensuring that the fixing ring 702 does not move with the swinging ring 701 during testing. Furthermore, the multiple clamping members 331 can move synchronously, simultaneously abutting or disengaging from the outer wall of the fixing ring 702, thereby centering the fixing ring 702 and ensuring that the bearing under test 70 is not eccentric.

[0106] Illustratively, there are three clamping members 331, which are evenly arranged along the circumference of the mounting ring 332. Alternatively, there are two clamping members 331, with the phase difference between the two clamping members 331 being 180°. Of course, in other embodiments of the present application, the number of clamping members 331 may be greater, as long as the fixing ring 702 can be fixed to the fixing base 320.

[0107] Optionally, each clamping member 331 corresponds to a driving member, and the driving members move synchronously to drive the clamping members 331 to move synchronously, so that the clamping members 331 synchronously abut the outer wall of the fixing ring 702. In this way, the fixing ring 702 can always be tightened in a symmetrical manner.

[0108] Optionally, the mounting ring 332 is rotatably mounted on the fixing base 320, and one end of the clamping member 331 is connected to the mounting ring 332, while the other end is radially movable on the fixing base 320. Rotation of the mounting ring 332 can drive the clamping members 331 to simultaneously move radially toward or away from the fixing ring 702. When the clamping members 331 simultaneously move radially toward the fixing ring 702, the fixing ring 702 can be consistently tightened in a symmetrical manner.

[0109] Of course, in other embodiments of the present application, the clamping and centering assembly 330 may also employ a structure similar to a three-jaw chuck or other structure capable of achieving automatic centering and clamping, which will not be described in detail here. Alternatively, the clamping and centering assembly 330 may also be employed in the drive mechanism 200, securing the swing ring 701 to the swing lever 223 via the clamping and centering assembly 330, thereby reliably securing the swing ring 701 to the swing lever 223. It is worth noting that the principle of clamping the swing ring 701 by the clamping and centering assembly 330 is essentially the same as the principle of clamping the fixed ring 702, which will not be described in detail here.

[0110] See also Figure 6 and Figure 7 In one embodiment, the testing mechanism 300 further includes a support member 340, which is sleeved around the support shaft 310 and supported between the fixing base 320 and the mounting frame 100. It will be appreciated that the structural form of the support member 340 is not limited in principle, as long as the support member 340 can support the fixing base 320 to the mounting frame 100. The support member 340 is disposed below the fixing base 320 and is connected to the fixing base 320. The support member 340 sleeves around the outside of the support shaft 310 and is also disposed on the mounting frame 100.

[0111] Optionally, the support member 340 includes a support base, which is disposed between the fixed base 320 and the mounting frame 100 and is sleeved on the support shaft 310. Optionally, the support member 340 also includes a plurality of support rods, which are evenly distributed around the support shaft 310 and connect the fixed base 320 and the mounting frame 100. Optionally, the support member 340 may also adopt a structural form that combines a support base and support rods. Of course, in other embodiments of the present application, the support member 340 may also be a support frame or other structural form that can provide a supporting function.

[0112] See also Figure 1 、 Figure 3 and Figure 6 In one embodiment, the testing mechanism 300 further includes a testing housing 350, which is mounted on the mounting frame 100 and covers the support shaft 310 and the fixing base 320. The testing housing 350 provides protection by covering the outside of the support shaft 310, the fixing base 320, and the support member 340. This prevents other components from interfering with the movement of the swing ring 701 and prevents the ingress of dust and other debris, thereby ensuring the accuracy of the test results.

[0113] See also Figure 1 、 Figure 3 and Figure 6In one embodiment, the test housing 350 includes a test base 352 and a test cover 351. The test base 352 is mounted on the mounting frame 100, and the test cover 351 is mounted on the test base 352 to enclose a test space 353. The fixed base 320, the swing arm 223, and the bearing 70 to be tested are located in the test space 353. The fixed base 320 and the support rod are located in the test space 353. The swing arm 223 and the bearing 70 to be tested are also tested in the test space 353. The test cover 351 can be opened or closed to facilitate the installation of the bearing 70 to be tested.

[0114] See also Figures 1 to 3 、 Figure 6 and Figure 7 In one embodiment, the grease-lubricated pseudo-fabric indentation and fretting wear bearing testing machine 10 further includes a temperature control mechanism 500 for controlling the temperature of the bearing 70 under test. As will be appreciated, the swinging of the bearing 70 under test during the test generates a certain amount of heat, which can cause deformation of the swing ring 701 and the fixed ring 702 due to thermal expansion and contraction, affecting the accuracy of the test results. The present application adds a temperature control mechanism 500 to cool the fixed seat 320, thereby reducing the temperature of the bearing 70 under test and ensuring the accuracy of the test results for the bearing 70 under test.

[0115] In one embodiment, the temperature control mechanism 500 includes a temperature control cabinet 510 and a heat exchange assembly 520 connected to the temperature control cabinet 510. Each heat exchange assembly 520 corresponds to a fixed seat 320. The temperature control cabinet 510 is capable of controlling the heat exchange temperature of the heat exchange assembly 520, thereby enabling the heat exchange assembly 520 to exchange heat with the fixed seat 320. One end of the heat exchange assembly 520 is capable of connecting to the temperature control cabinet 510, while the other end of the heat exchange assembly 520 is capable of extending into the test space 353 and being mounted on the fixed seat 320. The temperature control cabinet 510 is capable of controlling the heat exchange between the heat exchange assembly 520 and the fixed seat 320 to control the temperature of the bearing 70 to be tested.

[0116] The temperature-controlled cabinet 510 can output a constant-temperature fluid to the heat exchange assembly 520. This constant-temperature fluid is then used by the heat exchange assembly 520 to exchange heat with the mounting base 320, and subsequently with the bearing 70 under test. The heat exchange assembly 520 can maintain a constant temperature of the bearing 70 under test through both heat conduction and heat radiation. Furthermore, each mounting base 320 corresponds to a heat exchange assembly 520, meaning each bearing 70 under test has a corresponding heat exchange assembly 520. This heat exchange assembly 520 can control the temperature of the corresponding mounting base 320 and bearing 70 under test, allowing each bearing 70 under test to be independently temperature-controlled. This significantly improves temperature control precision and flexibility, thereby ensuring the accuracy of test results.

[0117] Optionally, the temperature control cabinet 510 is a high and low temperature integrated machine, which can achieve high and low temperature integrated control. Exemplarily, the number of heat exchange components 520 is four, each fixing seat 320 corresponds to a heat exchange component 520, and two heat exchange components 520 are set in each test space 353.

[0118] In one embodiment, the heat exchange assembly 520 includes a circulation pipeline 521, a control valve 523, and a heat exchange coil 522. The heat exchange coil 522 is disposed on the fixed base 320. The circulation pipeline 521 connects the temperature control cabinet 510 and the heat exchange coil 522. The control valve 523 is disposed on the circulation pipeline 521. The heat exchange coil 522 is disposed on the fixed base 320 and can exchange heat and control the temperature of the fixed base 320 and the bearing under test 70 through heat radiation and heat conduction, thereby maintaining a constant temperature of the bearing under test 70.

[0119] Circulation line 521 is connected to temperature-controlled cabinet 510, and heat exchange coil 522 is connected to circulation line 521. The control cabinet delivers constant-temperature fluid to circulation line 521, which then delivers the constant-temperature fluid to heat exchange coil 522. After heat exchange, the constant-temperature fluid enters temperature-controlled cabinet 510 through circulation line 521 for temperature control, allowing for the next heat exchange cycle. A control valve 523 is provided in circulation line 521 to control the flow rate of the constant-temperature fluid.

[0120] Moreover, the temperature control cabinet 510 can control the temperature of the output constant temperature fluid to meet the temperature control requirements of the bearing 70 to be tested. At the same time, the temperature control cabinet 510 can output constant temperature fluids of different temperatures to multiple heat exchange components 520 to achieve independent control of the temperature of each bearing 70 to be tested. Optionally, the heat exchange coil 522 is arranged around the fixed seat 320. Of course, in other embodiments of the present application, the heat exchange coil 522 can also be integrated in the fixed seat 320. Optionally, the heat exchange coil 522 and the fixed seat 320 are an integrated structure. In this way, the bearing 70 to be tested can be easily disassembled and replaced, reducing the number of parts.

[0121] In one embodiment, the temperature control mechanism 500 further includes a temperature sensor disposed on the mounting base 320. The temperature sensor can detect the temperature of the mounting base 320 in real time and provide feedback to the temperature control cabinet 510. The temperature control cabinet 510 then controls the temperature of the output constant temperature fluid based on the temperature feedback from the temperature sensor to ensure accurate temperature control of the bearing 70 under test. Using the temperature sensor, the temperature control accuracy is approximately 0.1°C.

[0122] This application uses a temperature control cabinet 510 as the main setting for temperature control. The temperature control cabinet 510 can realize the circulation flow of the constant temperature fluid and control the temperature of the constant temperature fluid. Moreover, each bearing 70 to be tested and the fixing seat 320 correspond to a heat exchange component 520. The heat exchange component 520 can independently control the temperature of each bearing 70 to be tested, greatly improving the temperature control accuracy and flexibility. Optionally, the constant temperature fluid is a liquid or a gas. Moreover, when conducting tests at -20°C, rapid cooling and constant temperature are achieved by matching the compressed air flow control with the cooling strategy parameters.

[0123] See also Figure 6 and Figure 7 In one embodiment, the loading mechanism 400 includes a loading member connected to the support shaft 310 to load the support shaft 310. The loading member is located below the mounting frame 100, abuts the mounting frame 100, and is connected to the support shaft 310. The loading member can load the support shaft 310, and then load the bearing 70 to be tested through the support shaft 310 and the fixing seat 320, so that the bearing 70 to be tested can be tested under the action of the load.

[0124] In one embodiment, the loading member is a disc spring 410, which is sleeved on the support shaft 310. The loading mechanism 400 also includes a loading wrench 420 and a torque sensor 430. The loading wrench 420 is arranged on the top of the support shaft 310, and the torque sensor 430 is arranged on the support shaft 310. The loading wrench 420 drives the support shaft 310 to rotate relative to the mounting frame 100 to load the loading member, and monitors the load of the loading member through the torque sensor 430.

[0125] The disc spring 410 is mounted on the support shaft 310 and is located below the mounting frame 100. The loading wrench 420 is located on top of the support shaft 310. When the loading wrench 420 is operated, it drives the support shaft 310 to rotate, which in turn drives the disc spring 410 to move, thereby loading the disc spring 410. The elastic force generated by the loaded disc spring 410 pulls down the support shaft 310, which in turn drives the fixing seat 320 and the bearing 70 to move downward, thereby loading the bearing 70.

[0126] The use of disc springs 410 for loading can significantly reduce the volume of the loading mechanism 400 and the weight of the entire grease-lubricated pseudo-cloth indentation and micro-abrasion bearing testing machine 10, making the entire machine structure more compact and lightweight, while also simplifying operation. As the test progresses, wear in the contact area of the disc spring 410 may cause load fluctuations. To this end, the present application provides a torque sensor 430, which monitors load changes in real time. If the load change exceeds a critical value, fine-tuning can be performed using the loading wrench 420 during the test.

[0127] Optionally, the loading mechanism 400 further includes a loading housing 450, which is disposed below the mounting frame 100 and covers the disc spring 410 and the support shaft 310. The loading housing 450 protects the disc spring 410. Optionally, the loading mechanism 400 further includes a blocking member 440, the disc spring 410 is sleeved on the support shaft 310, the top of the disc spring 410 abuts the mounting frame 100, and the blocking member 440 is disposed on the support shaft 310 and abuts the bottom of the disc spring 410. The disc spring 410 is limited by the blocking member 440 and the mounting frame 100. Of course, in other embodiments of the present application, the loading member is a structural form capable of achieving loading, such as a hydraulic cylinder, a pneumatic cylinder, or a weight.

[0128] The grease-lubricated pseudo-cloth indentation and micro-abrasion bearing testing machine 10 of the present application adopts a parallel transmission assembly 220 to transmit the reciprocating motion of the drive motor 210 to the bearing to be tested 70 of the test mechanism 300, so as to drive the swing ring 701 of the bearing to be tested 70 to swing back and forth relative to the fixed ring 702, thereby realizing the grease lubrication performance test of the bearing to be tested 70. The parallel transmission assembly 220 adopts a parallel transmission method to connect the bearing to be tested 70 in the test mechanism 300. It can accurately transmit torque under the swinging condition without generating additional axial force or normal force, and thus will not generate structural impact force on the parallel transmission assembly 220. In this way, there is no need to set a support body to balance the additional force, simplifying the structural complexity and control difficulty of the drive mechanism 200, improving the efficiency of the drive motor 210, and thus improving the test accuracy and repeatability, which is conducive to realizing high-frequency reciprocating control of the bearing to be tested 70, thereby ensuring the accuracy of the test results.

[0129] This grease-lubricated pseudo-fabric indentation and fretting wear bearing testing machine 10 evaluates the grease fretting performance of a bearing 70 under test. It can better simulate the actual service conditions of the bearing 70 under test, enabling grease-lubricated anti-fretting performance testing under high and low temperature, heavy load, and small-angle reciprocating rolling conditions. Key parameters are provided for metrological support, resulting in highly repeatable test results. Furthermore, the drive mechanism 200, through its parallelogram structure, achieves high-frequency reciprocating oscillation, ensuring test stability and accuracy.

[0130] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0131] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A grease lubricated pseudo-cloth indentation and fretting abrasion bearing testing machine, characterized in that: include: Install the rack; The driving mechanism includes a driving motor and a parallel transmission assembly, wherein the driving motor is provided on the mounting frame, and the parallel transmission assembly is connected in parallel to the output end of the driving motor and the swing ring of the bearing to be tested; a testing mechanism, provided on the mounting frame and used for mounting the fixing ring of the bearing to be tested; and a loading mechanism, provided on the mounting frame and configured to load the testing mechanism; The driving motor drives the parallel transmission assembly to drive the bearing to be tested to swing back and forth in the testing mechanism; The parallel transmission assembly includes an output rod, a swing rod, and two transmission rods. The swing rod is used to fix the swing ring of the bearing to be tested, and the fixed ring of the bearing to be tested is fixed in the testing mechanism. The two transmission rods are arranged in parallel, the output rod is provided at the output end of the drive motor, the swing rod is arranged in parallel with the output rod, and the output rod and the swing rod are rotatably connected to the two transmission rods respectively, so that the parallel transmission assembly is a parallelogram.

2. The grease lubricated pseudo-cloth indentation and fretting wear bearing testing machine according to claim 1, characterized in that: The swing lever comprises a fixed body and two connecting parts, wherein the two connecting parts are symmetrically arranged on both sides of the fixed body and are rotatably connected to the two transmission levers respectively; The parallel transmission assembly further includes a first adapter, a second adapter and a rotating member, wherein the first adapter is arranged at the connecting portion, the second adapter is arranged at the end of the transmission rod, and the rotating member can rotatably connect the first adapter and the second adapter; or, the parallel transmission assembly further includes a hinged member, which hinges the connecting portion and the transmission rod.

3. The grease lubricated pseudo-cloth indentation and fretting wear bearing testing machine according to claim 1, characterized in that: There are two test mechanisms, which are symmetrically arranged on the mounting frame. The parallel transmission assembly includes two swing rods. The output rod is rotatably arranged in the middle area of the transmission rod. The two ends of the two transmission rods are respectively connected to the two swing rods. The two swing rods and the two transmission rods are arranged to form a parallelogram. And / or, the transmission rod comprises a plurality of connecting rods, and the plurality of connecting rods are connected in series to form the transmission rod.

4. The grease lubricated pseudo-cloth indentation and fretting wear bearing testing machine according to any one of claims 1 to 3, characterized in that: The testing mechanism includes a support shaft and a fixed seat. The support shaft is arranged on the mounting frame and extends through the swing arm. The fixed seat is fixed to the support shaft and is located on the side of the swing arm. The fixing ring is installed in the fixed seat, and the swing ring is installed in the swing arm.

5. The grease lubricated pseudo-cloth indentation and fretting wear bearing testing machine according to claim 4, characterized in that: The testing mechanism further comprises a clamping and centering assembly, the clamping and centering assembly comprising a plurality of clamping members and a mounting ring, the mounting ring being arranged on the fixing seat; The plurality of clamping members are evenly distributed along the circumference of the mounting ring, and each clamping member is movably arranged in the mounting ring along the radial direction and can abut against the outer wall of the fixed ring of the bearing to be tested.

6. The grease lubricated pseudo-cloth indentation and fretting wear bearing testing machine according to claim 4, characterized in that: There are two fixing seats, which are located on both sides of the swinging rod, and one bearing to be tested is installed in each fixing seat; And / or, the testing mechanism further comprises a support member, wherein the support member is sleeved on the support shaft and supported between the fixing seat and the mounting frame; And / or, the testing mechanism also includes a testing shell, which is arranged on the mounting frame and covers the support shaft and the fixed seat. The testing shell includes a testing base and a testing cover. The testing base is arranged on the mounting frame, and the testing cover is arranged on the testing base to enclose a testing space. The fixed seat, the swing arm and the bearing to be tested are located in the testing space.

7. The grease lubricated pseudo-cloth indentation and fretting wear bearing testing machine according to claim 4, characterized in that: The grease-lubricated pseudo-cloth indentation and fretting wear bearing testing machine further comprises a temperature control mechanism, which is used to control the temperature of the bearing to be tested; The temperature control mechanism includes a temperature control cabinet and a heat exchange component connected to the temperature control cabinet, each heat exchange component corresponds to a fixing seat, and the temperature control cabinet can control the heat exchange temperature of the heat exchange component so that the heat exchange component and the fixing seat exchange heat; The heat exchange component includes a circulation pipeline, a control valve and a heat exchange coil, the heat exchange coil is arranged on the fixed seat, the circulation pipeline connects the temperature control cabinet and the heat exchange coil, and the control valve is arranged on the circulation pipeline; and / or, the temperature control mechanism also includes a temperature sensor, and the temperature sensor is arranged on the fixed seat.

8. The grease lubricated pseudo-cloth indentation and fretting wear bearing testing machine according to claim 4, characterized in that: The loading mechanism includes a loading member connected to the support shaft to load the support shaft; The loading member is a disc spring, and the loading member is sleeved on the support shaft. The loading mechanism also includes a loading wrench and a torque sensor. The loading wrench is arranged on the top of the support shaft, and the torque sensor is arranged on the support shaft. The loading wrench drives the support shaft to rotate relative to the mounting frame to load the loading member, and the load of the loading member is monitored by the torque sensor. Alternatively, the loading member is a hydraulic cylinder, a pneumatic cylinder or a weight.

9. The grease lubricated pseudo-cloth indentation and fretting wear bearing testing machine according to any one of claims 1 to 3, characterized in that: The mounting frame includes a frame body and a protective cover, the driving mechanism, the testing mechanism, and the loading mechanism are arranged on the frame body, the driving motor is arranged on the frame body in a vertical direction, and is located on both sides of the frame body with the parallel transmission assembly, the protective cover covers the parallel transmission assembly and the testing mechanism, and the protective cover has a switch cover that can be opened or closed, and the switch cover is arranged corresponding to the testing mechanism; And / or, the grease-lubricated pseudo-cloth indentation and micro-abrasion bearing testing machine further includes an operating table, the operating table is provided with a host computer, and the host computer is connected to the drive motor.

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