Drive mechanism and grease lubricated pseudo-brinelling and fretting bearing tester

Abstract

The application relates to a driving mechanism and a grease-lubricated pseudo-brinell indentation and fretting wear bearing testing machine. The driving mechanism comprises a driving motor, a parallel transmission assembly, and an output assembly. The parallel transmission assembly comprises two swing rod members and two transmission rod members, the two swing rod members and the two transmission rod members are arranged in parallel respectively, and the parallel transmission assembly is in the shape of a parallelogram. One end of the output assembly is rotatably connected to the output end of the driving motor, and the other end is rotatably connected to the connection between the swing rod member and one of the transmission rod members. The driving motor drives the swing rod member to drive the transmission rod member to move, so that the two swing rod members simultaneously drive the swing ring of the bearing to be tested to rotate relative to the fixed ring. In this way, the power of the driving motor directly acts on the swing rod member, improving the accuracy of power transmission and the transmission efficiency. Meanwhile, the parallel transmission assembly can accurately transmit torque under swing conditions without generating structural impact force, thereby ensuring the accuracy of the test results.

Description

Technical Field

[0001] This application relates to the field of testing equipment technology, and in particular to a drive mechanism and a bearing testing machine for grease-lubricated pseudo-cloth indentation and fretting abrasion. Background Technology

[0002] Large slewing bearings mainly operate under low-speed, heavy-load conditions, bearing large loads and torques. They have a wide range of applications, such as heavy machinery, tower cranes, wind turbines, solar generators, turrets, and radar systems. Grease is generally used as the internal lubricating medium for these bearings.

[0003] Currently, the research and production technology of large slewing bearings is relatively mature, and the domestic and international markets are experiencing oversupply. Therefore, extending service life, improving performance, and reducing maintenance costs have become the most important core competitiveness for this type of product. Taking the wind power industry as an example, high-power and ultra-high-power wind turbines are the mainstream development direction for the future. Correspondingly, blade sizes will further increase, and turbine structures will become more compact. This necessitates an urgent need to improve the service life and reliability of yaw and pitch bearings (typical large slewing bearings).

[0004] However, the current situation is that there is very limited room for further improvement in bearing performance and reduction in production costs from the perspectives of materials and structure. Major bearing manufacturers and even OEMs are focusing their attention on the selection of matching lubricating greases. Therefore, improving the wear resistance and friction reduction properties of lubricating greases has become a fiercely contested area for lubrication product suppliers. Regarding the evaluation of grease lubrication performance of large slewing bearings under low-speed, heavy-load conditions, a crucial indicator is resistance to fretting corrosion. Fretting corrosion is one of the most typical failure modes in large slewing bearings, which can cause severe cracks, oxidation, fatigue spalling, and ultimately lead to accidents.

[0005] Currently, when evaluating the performance of fretting abrasion, the connection between the drive shaft of the test system and the test mechanism is a single-axis connection, which involves structural impact forces and requires additional mechanical structures for balancing. This results in a complex structure and introduces additional power consumption, which is not conducive to achieving high-precision high-frequency reciprocating control. Furthermore, the power output from the motor is transmitted to the bearings through a complex transmission structure, which can lead to deviations in power transmission and affect transmission efficiency, thus impacting the accuracy of the test results. Utility Model Content

[0006] Therefore, it is necessary to address the problems of complex structure and poor power transmission efficiency of current single-axis drive test systems by providing a drive mechanism and a bearing testing machine for grease-lubricated pseudo-cloth indentation and fretting abrasion. This machine eliminates the need for a support body to balance the additional force, simplifies the structural complexity and control difficulty, and can also achieve accurate power transmission, thereby ensuring the accuracy of test results.

[0007] A drive mechanism is used in a grease-lubricated pseudo-cloth indentation and fretting abrasion bearing testing machine, and is connected to the swing ring of the bearing to be tested. The drive mechanism includes:

[0008] Drive motor;

[0009] A parallel transmission assembly includes two swing rods and two transmission rods. Each swing rod is rotatably mounted in the testing mechanism of the grease-lubricated pseudo-cloth indentation and fretting abrasion bearing testing machine and is used to fix the swing ring of the bearing under test. The fixed ring of the bearing under test is fixed in the testing mechanism. The two swing rods and the two transmission rods are arranged in parallel. The two ends of each swing rod are rotatably connected to the two transmission rods, making the parallel transmission assembly a parallelogram.

[0010] An output component, one end of which is rotatably connected to the output end of the drive motor, and the other end of which is rotatably connected to the connection between the swing rod and one of the transmission rods, wherein the drive motor drives the swing rod to move the transmission rod, so that the two swing rods simultaneously drive the swing ring of the bearing under test to rotate relative to the fixed ring.

[0011] In one embodiment of this application, the output component includes an output part and an output rod. The output part is rotatably mounted on the output end of the drive motor. One end of the output rod is rotatably connected to the output part, and the other end is rotatably connected to the connection between the swing rod and one of the transmission rods.

[0012] In one embodiment of this application, the output component includes a mounting body and a connecting body. The mounting body is rotatably disposed on the output end of the drive motor, and the connecting body is disposed on a portion of the outer periphery of the mounting body and protrudes radially along the mounting body. The connecting body is used to rotatably connect one end of the output rod.

[0013] Alternatively, the output component includes a mounting body and an output shaft. The mounting body is rotatably disposed at the output end of the drive motor, and the output shaft protrudes axially from the end face of the mounting body. The axis of the output shaft is offset from the rotation axis of the mounting body, and the output shaft is rotatably connected to one end of the output rod.

[0014] In one embodiment of this application, the output component further includes a first rotating member, one end of the output component has a first connecting hole, one end of the output rod has a second connecting hole, and the first rotating member rotatably passes through the first connecting hole and the second connecting hole to rotatably connect the output component and the output rod.

[0015] And / or, the output component further includes a second rotating member, the other end of the output rod having a first mounting hole, one end of the swing rod having a second mounting hole, and one end of the transmission rod having a third mounting hole. The second rotating member is rotatably passed through the first mounting hole, the second mounting hole, and the third mounting hole to rotatably connect the output rod, the swing rod, and the transmission rod.

[0016] In one embodiment of this application, the output component further includes an eccentric component, the eccentric component including a mounting shaft and an eccentric shaft, the mounting shaft being disposed at the output end of the drive motor, the eccentric shaft being disposed on the mounting shaft, the axis of the eccentric shaft being offset from the axis of the drive motor, and the output component being rotatably mounted on the eccentric shaft;

[0017] And / or, the output component further includes a mounting bearing, the inner ring of which is fitted onto the output end of the drive motor, and the outer ring of which is mounted in the output component. The outer ring of the mounting bearing is rotatable relative to the inner ring, so that the output component rotates about the output end of the drive motor.

[0018] A grease-lubricated pseudo-cloth indentation and fretting abrasion bearing testing machine includes a mounting frame, two testing mechanisms, two loading mechanisms, and a drive mechanism as described in any of the above technical features;

[0019] Two test mechanisms are spaced apart on the mounting frame, and a retaining ring of a bearing to be tested is installed in each test mechanism. Two loading mechanisms are spaced apart on the mounting frame and respectively load the corresponding test mechanism.

[0020] The drive mechanism has a drive motor mounted on a frame, and a swing rod is swingably mounted in the test mechanism. The drive motor drives the swing rod through an output component to rotate the bearing under test in the test mechanism, so that the parallel transmission component drives another swing rod to rotate the bearing under test in the corresponding test mechanism.

[0021] In one embodiment of this application, the testing mechanism includes a support shaft and a fixed seat. The support shaft is disposed on the mounting frame and extends through the swing rod. The fixed seat is fixed to the support shaft and located on the side of the swing rod. The fixed seat is equipped with the fixed ring, and the swing ring is equipped with the swing rod.

[0022] There are two fixed seats, located on both sides of the swing rod, and one bearing to be tested is installed in each fixed seat;

[0023] And / or, the testing mechanism further includes a support member, which is sleeved on the support shaft and supported between the fixed base and the mounting frame;

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

[0025] In one embodiment of this application, the grease-lubricated pseudo-cloth indentation and fretting abrasion bearing testing machine further includes 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 fixed base. The temperature control cabinet can control the heat exchange temperature of the heat exchange component, so that the heat exchange component exchanges heat with the fixed base.

[0027] The heat exchange assembly includes a circulation pipeline, a control valve, and a heat exchange coil. The heat exchange coil is mounted on the fixed base. The circulation pipeline connects the temperature control cabinet and the heat exchange coil. The control valve is mounted on the circulation pipeline. And / or, the temperature control mechanism further includes a temperature sensor, which is mounted on the fixed base.

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

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

[0030] Alternatively, the loading element may be a hydraulic cylinder, a pneumatic cylinder, or a weight.

[0031] In one embodiment of this application, the mounting frame includes a frame body and a protective cover. The drive mechanism, the testing mechanism, and the loading mechanism are disposed on the frame body. The drive motor is disposed vertically on the frame body 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. The protective cover has an openable or closable switch cover, which is provided corresponding to the testing mechanism.

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

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

[0034] The driving mechanism and the grease-lubricated dummy cloth indentation and fretting abrasion bearing testing machine of this application, wherein each swinging rod is rotatably mounted in the testing mechanism of the grease-lubricated dummy cloth indentation and fretting abrasion bearing testing machine, the swinging ring of the bearing under test is mounted on the swinging rod, and the fixed ring of the bearing under test is mounted on the testing mechanism. Two swinging rods are arranged in parallel, and two transmission rods are parallel components, with both ends of the two transmission rods connected to the swinging rods respectively, so that the parallel transmission assembly forms a parallelogram. One end of the output assembly is located at the output end of the drive motor, and the other end of the output assembly is rotatably connected to the connection point of one of the swinging rods and one of the transmission rods, so as to drive the swinging rods to rotate and drive the transmission rods to move.

[0035] This drive mechanism uses an output component to directly transmit the power of the drive motor to the swinging rod, causing the swinging rod to drive the swinging ring of the bearing under test to reciprocate relative to the fixed ring, thus performing a grease lubrication performance test on the bearing. In this way, the power of the drive motor acts directly on the swinging rod, reducing the power transmission path, improving the accuracy of power transmission, and increasing transmission efficiency. Simultaneously, in the parallel transmission assembly, the swinging rod can drive another swinging rod to rotate through the transmission rod. It can accurately transmit torque under swinging conditions without generating additional axial or normal forces, thus avoiding structural impact on the parallel transmission assembly. This eliminates the need for a support structure to balance additional forces, simplifying the structural complexity and control difficulty of the drive mechanism, improving the efficiency of the drive motor, and consequently improving test accuracy and repeatability. It also facilitates high-frequency reciprocating control of the bearing under test, thereby ensuring the accuracy of the test results. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of a bearing testing machine for grease-lubricated pseudo-cloth indentation and fretting abrasion in one embodiment of this application.

[0037] Figure 2 for Figure 1 The diagram shown is a schematic of a grease-lubricated pseudo-cloth indentation and fretting abrasion bearing testing machine with the test housing and protective cover removed.

[0038] Figure 3 for Figure 2 The diagram shown is a schematic representation of the drive mechanism in a grease-lubricated pseudo-cloth indentation and fretting bearing testing machine from one perspective.

[0039] Figure 4 for Figure 3 The diagram shows the drive mechanism from another perspective.

[0040] Figure 5 for Figure 3 The diagram shows the parallel transmission component and the output component of the drive mechanism from one perspective.

[0041] Figure 6 for Figure 5 The diagram shows the parallel transmission assembly and output assembly from another perspective.

[0042] Figure 7 for Figure 5 The diagram shows an exploded view of the parallel transmission assembly and the output assembly.

[0043] Figure 8 for Figure 5 The diagram shows the output component.

[0044] Figure 9 for Figure 8 The diagram shows an exploded view of the output components.

[0045] Figure 10 for Figure 1 The cross-sectional view of the grease-lubricated pseudo-cloth indentation and fretting abrasion bearing testing machine at the testing mechanism is shown.

[0046] Figure 11 for Figure 10 The diagram shown is an exploded view of the testing mechanism with its outer casing removed.

[0047] Among them: 10. Grease-lubricated pseudo-cloth indentation and fretting abrasion bearing testing machine; 100. Drive mechanism; 110. Drive motor; 120. Parallel transmission assembly; 121. Swinging rod; 1211. Fixed body; 1212. Connecting part; 122. Transmission rod; 130. Output assembly; 131. Output component; 1311. Mounting body; 1312. Connecting body; 132. Output rod; 133. Eccentric component; 1331. Mounting shaft; 1332. Eccentric shaft; 134. Mounting bearing; 200. Mounting frame; 210. Frame body; 220. Protective cover; 221. Switch cover; 300. Test mechanism; 310, support shaft; 320, fixed seat; 330, support component; 340, test housing; 341, test top cover; 342, test base; 343, test space; 400, loading mechanism; 410, disc spring; 420, loading wrench; 430, torque sensor; 440, blocking component; 450, loading housing; 500, temperature control mechanism; 510, temperature control cabinet; 520, heat exchange assembly; 521, circulation pipeline; 522, heat exchange coil; 523, control valve; 600, operating table; 70, bearing under test; 701, swing ring; 702, fixed ring; 703, rolling element. Detailed Implementation

[0048] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0049] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0050] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0051] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0052] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact, or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0053] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, 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 possible implementation.

[0054] Understandably, large slewing bearings primarily operate under low-speed, heavy-load conditions, bearing significant loads and torques, and generally use grease as the internal lubricating medium. A crucial indicator for evaluating the grease lubrication performance of large slewing bearings under low-speed, heavy-load conditions is their resistance to fretting corrosion. Currently, the evaluation of bearing fretting corrosion performance uses a single-axis connection between the drive shaft and the testing mechanism in the test system. This introduces structural impact forces, requiring additional mechanical structures for balancing, resulting in a complex structure. Furthermore, the power output from the motor is transmitted to the bearing through this complex transmission structure, leading to deviations in power transmission and affecting transmission efficiency, thus impacting the accuracy of the test results.

[0055] For this purpose, please refer to Figures 1 to 3 This application provides a drive mechanism 100, which is applied in a grease-lubricated pseudo-cloth indentation and fretting abrasion bearing testing machine 10. Figure 1 This is a schematic diagram of the grease-lubricated pseudo-cloth indentation and fretting abrasion bearing testing machine 10 in one embodiment of this application. Figure 2 for Figure 1 The diagram shown is a schematic of the grease-lubricated pseudo-cloth indentation and fretting abrasion bearing testing machine 10 with the test housing 340 and protective cover 220 removed. Figure 3 for Figure 2 The diagram shows a schematic of the drive mechanism 100 in the grease-lubricated pseudo-cloth indentation and fretting bearing testing machine 10 from one perspective.

[0056] To better illustrate the structure of the drive mechanism 100, the structure of the grease-lubricated pseudo-cloth indentation and fretting abrasion bearing testing machine 10 will be briefly described here. (See also...) Figures 1 to 3 The grease-lubricated dummy cloth indentation and fretting abrasion bearing testing machine 10 includes a mounting frame 200, a testing mechanism 300, a loading mechanism 400, and the drive mechanism 100 of this application. The grease-lubricated dummy cloth indentation and fretting abrasion bearing testing machine 10 can test the grease lubrication performance of the bearing 70 under test, to evaluate the anti-fretting abrasion performance and dummy cloth indentation of the bearing 70 under test when grease lubrication is used, thereby evaluating the performance of the lubricating grease to meet the requirements of service life, reliability, etc. of the bearing 70 under test. Of course, in other embodiments of this application, the grease-lubricated dummy cloth indentation and fretting abrasion bearing testing machine 10 can also evaluate other properties of the lubricating grease, which will not be elaborated here.

[0057] The grease-lubricated pseudo-cloth indentation and micro-motion abrasion 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 the additional forces, simplifies the structural complexity and control difficulty, and improves the test accuracy and repeatability. It also facilitates the high-frequency reciprocating control of the bearing under test 70, thereby ensuring the accuracy of the test results.

[0058] The grease-lubricated pseudo-cloth indentation and fretting abrasion bearing testing machine 10 can test the bearing 70 to be tested. The bearing 70 to be tested 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 described below. The bearing 70 to be tested includes two bearing seats and multiple rolling elements 703, which are located between the two bearing seats. The two bearing seats are a swing ring 701 and a fixed ring 702. The swing ring 701 can swing, while the fixed ring 702 is fixed. When the swing ring 701 swings, it can drive the rolling elements 703 to move synchronously, while the fixed ring 702 does not move with the swing ring 701 and the rolling elements 703. During the test, the bearing 70 to be tested is arranged vertically. The upper bearing seat can be the swing ring 701 and the lower bearing seat can be the fixed ring 702, or vice versa.

[0059] A certain amount of grease (test sample) is filled into the bearing 70 to be tested. The grease-lubricated pseudo-cloth indentation and fretting abrasion bearing testing machine 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 to be tested can reciprocate at a certain angle to generate fretting abrasion (even very slight wear may manifest as pseudo-cloth indentation). The mass loss of the bearing 70 to be tested before and after the weighing test is compared as a quantitative basis for evaluating fretting abrasion, so as to determine the quality of the grease's anti-fretting abrasion performance in the bearing 70 to be tested.

[0060] The mounting frame 200 serves as the support frame for the grease-lubricated dummy cloth indentation and fretting abrasion bearing testing machine 10. All mechanisms within the machine are housed within the mounting frame 200, which supports these mechanisms and ensures their stable operation. The drive mechanism 100 is the power component of the machine. It outputs reciprocating oscillating motion to drive the oscillating ring 701 of the bearing under test 70 to oscillate back and forth, thereby achieving the grease lubrication performance test of the bearing under test 70.

[0061] The testing mechanism 300 is mounted on the mounting frame 200 and located on the side of the drive mechanism 100. The bearing under test 70 is located in the testing mechanism 300. The loading mechanism 400 is also mounted on the mounting frame 200 and is connected to the testing mechanism 300. The loading mechanism 400 can load the testing mechanism 300, and then load the bearing under test 70 in the testing mechanism 300. In this way, the bearing under test 70 can oscillate back and forth under the load of the loading mechanism 400 to simulate the grease lubrication performance of the bearing under test 70 under loading conditions, thereby obtaining the anti-fretting wear performance of the bearing under test 70 and the wear resistance and friction reduction performance of the grease used in the bearing under test 70.

[0062] The loading mechanism 400 can apply different loads to the testing 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 100 connects to the swing ring 701 of the bearing under test 70, and the fixed ring 702 of the bearing under test 700 is installed in the testing mechanism 300. The swing ring 701 and the fixed ring 702 are supported by rolling elements 703. When the drive mechanism 100 outputs reciprocating swing motion, it can drive the swing ring 701 to reciprocate relative to the fixed ring 702 and the testing mechanism 300 via the rolling elements 703.

[0063] The drive mechanism 100 of this application can directly transmit the power of the drive motor 110, reducing the power transmission path, improving the accuracy of power transmission, and increasing transmission efficiency. Simultaneously, the drive mechanism 100 can accurately transmit torque under oscillating conditions without generating additional axial or normal forces, thus avoiding structural impact on the parallel transmission assembly 120. This eliminates the need for a support structure to balance the additional forces, simplifying the structural complexity and control difficulty of the drive mechanism 100, improving the efficiency of the drive motor 110, and consequently enhancing 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 specific structures of the drive mechanism 100 in some embodiments are described below.

[0064] See Figures 2 to 6 In one embodiment, the drive mechanism 100 includes a drive motor 110, a parallel transmission assembly 120, and an output assembly 130. The parallel transmission assembly 120 includes two swing rods 121 and two transmission rods 122. Each swing rod 121 is rotatably mounted in the testing mechanism 300 of the grease-lubricated pseudo-cloth indentation and fretting abrasion bearing testing machine 10, and is used to fix the swing ring 701 of the bearing under test 70. The fixing ring 702 of the bearing under test 70 is fixed in the testing mechanism 300. The two swing rods 121 and the two transmission rods 122 are arranged in parallel, and the two ends of the swing rods 121 are rotatably connected to the two transmission rods 122, so that the parallel transmission assembly 120 is a parallelogram.

[0065] One end of the output component 130 is rotatably connected to the output end of the drive motor 110, and the other end is rotatably connected to the connection between the swing rod 121 and one of the transmission rods 122. The drive motor 110 drives the swing rod 121 to move the transmission rod 122, so that the two swing rods 121 simultaneously drive the swing ring 701 of the bearing under test 70 to rotate relative to the fixed ring 702. Figure 4 for Figure 3 The schematic diagram of the drive mechanism 100 shown is from another perspective. Figure 5 for Figure 3 The schematic diagram shown is of the parallel transmission component 120 and the output component 130 in the drive mechanism 100 from one perspective. Figure 6 for Figure 5 A schematic diagram of the parallel transmission assembly 120 and the output assembly 130 from another perspective.

[0066] The drive motor 110 is the power source for the drive mechanism 100 and also the power source for the entire grease-lubricated pseudo-cloth indentation and micro-motion abrasion bearing testing machine 10. The drive motor 110 is mounted on the mounting frame 200. The output component 130 is the component that outputs power from the drive motor 110. The parallel transmission component 120 is the power transmission component, and the parallel transmission component 120 has a parallelogram transmission structure. In the parallel transmission component 120, two swing rods 121 are arranged opposite and parallel in one direction, and two transmission rods 122 are arranged opposite and parallel in another direction. The two ends of each transmission rod 122 are rotatably connected to the swing rod 121.

[0067] Two swing rods 121 and two transmission rods 122 are sequentially connected at their ends, forming a parallelogram structure, making the parallel transmission assembly 120 a parallelogram as a whole. When the bearing under test 70 is installed, the swing ring 701 of the bearing under test 70 is disposed in the swing rod 121, and the fixed ring 702 of the bearing under test 70 is disposed in the testing mechanism 300. The swing rod 121 can swing relative to the testing mechanism 300, thereby driving the swing ring 701 of the bearing under test 70 to swing relative to the fixed ring 702, so as to perform a grease lubrication performance test on the bearing under test 70.

[0068] In this application, the grease-lubricated spurious cloth indentation and fretting abrasion bearing testing machine 10 has two testing mechanisms 300. These two testing mechanisms 300 are spaced apart on the support frame and symmetrically arranged on both sides of the drive motor 110. Each testing mechanism 300 is equipped with a swing rod 121. Thus, each swing rod 121 can be connected to a bearing 70 under test within the testing mechanism 300. In this way, the parallel transmission assembly 120 can simultaneously drive the two swing rods 121 to rotate the corresponding swing ring 701 of the bearing 70 under test, thereby simultaneously conducting grease lubrication performance tests on both bearings 70 under test.

[0069] Furthermore, one end of the output component 130 is connected to the output end of the drive motor 110, and the other end is rotatably connected to the rotatable connection between one of the swing rods 121 and one of the transmission rods 122. Figure 6 In this configuration, one end of the output component 130 is connected to one end of the left-side swing rod 121. Of course, in other embodiments of this application, the output rod 132 can also be connected to the right-side swing rod 121, or to the other end of the swing rod 121, with the same principle. Figure 6 The principle of connecting one end of the output component 130 shown to the left swing rod 121 is essentially the same, and will not be repeated hereafter.

[0070] When the drive motor 110 outputs power, it drives the output component 130 to rotate. The output component 130 then moves the swing rod 121, causing it to swing relative to the test mechanism 300. Furthermore, as the swing rod 121 swings, it transmits power to another swing rod 121 via the transmission rod 122 in the parallel transmission component 120. Thus, the drive motor 110 can directly transmit power to the swing rod 121 through the output component 130, allowing the swing rod 121 to directly drive the swing ring 701 of the bearing under test 70 to swing relative to the fixed ring 702, thereby performing a grease lubrication performance test on the bearing under test 70. In this way, the power of the drive motor 110 directly acts on the swing rod 121, reducing the power transmission path, simplifying the power transmission structure, improving the accuracy of power transmission, and increasing transmission efficiency.

[0071] Simultaneously, the power of the swing rod 121 can be transmitted to another swing rod 121 through two transmission rods 122, so that the other swing rod 121 can drive the swing ring 701 of the bearing under test 70 to swing relative to the fixed ring 702, so that the two swing rods 121 rotate synchronously, thereby synchronously performing grease lubrication performance tests on the two bearings under test 70. Since the parallel transmission assembly 120 is subjected to force balance during the force transmission process, it will not generate additional axial or normal forces. Thus, the bearing under test 70 does not need to use an additional support to apply parallel force, which makes the structure of the drive mechanism 100 simple and compact. It does not need to overcome additional friction or structural forces, improves the efficiency of the drive motor 110, and greatly improves the test accuracy and repeatability of the test results.

[0072] The drive mechanism 100 in the above embodiment uses an output component 130 to directly transmit the power of the drive motor 110 to the swing rod 121, so that the swing rod 121 drives the swing ring 701 of the bearing under test 70 to swing back and forth relative to the fixed ring 702, in order to perform a grease lubrication performance test on the bearing under test 70. In this way, the power of the drive motor 110 acts directly on the swing rod 121, reducing the power transmission path, improving the accuracy of power transmission, and improving transmission efficiency. At the same time, the swing rod 121 in the parallel transmission assembly 120 can drive another swing rod 121 to rotate through the transmission rod 122. It can accurately transmit torque under swing conditions without generating additional axial or normal forces, and thus will not generate structural impact forces on the parallel transmission assembly 120. This eliminates the need for a support to balance the additional forces, simplifies the structural complexity and control difficulty of the drive mechanism 100, improves the efficiency of the drive motor 110, and thus improves the test accuracy and repeatability. It is also conducive to realizing high-frequency reciprocating control of the bearing under test 70, thereby ensuring the accuracy of the test results.

[0073] See Figures 1 to 4 In one embodiment, the drive motor 110 is a rotary motor capable of outputting high-precision reciprocating oscillating motion. Optionally, the drive motor 110 and the parallel transmission assembly 120 are respectively disposed on opposite sides of the mounting frame 200. The drive motor 110 is located below the mounting frame 200, and the parallel transmission assembly 120 is located above the mounting frame 200. The output end of the drive motor 110 passes through the mounting frame 200 and connects to the parallel transmission assembly 120. In this way, the drive motor 110 does not need to occupy space above the mounting frame 200, reducing the overall height of the grease-lubricated fabric indentation and fretting abrasion bearing testing machine 10.

[0074] See Figures 1 to 4In one embodiment, the drive motor 110 is vertically positioned below the mounting frame 200, and the testing mechanism 300 is located above the mounting frame 200 and to the side of the drive motor 110. The test bearing 70 in the testing mechanism 300 is driven to reciprocate through a parallel transmission assembly 120. In other words, the drive motor 110 is vertically positioned and can provide high-frequency reciprocating oscillation motion around the Z-axis in the XY plane. This high-frequency reciprocating oscillation motion is transmitted to the test bearing 70 through the parallel transmission assembly 120, enabling the test bearing 70 to perform high-frequency reciprocating oscillation motion around the Z-axis in the XY plane.

[0075] See Figures 3 to 9 In one embodiment, the output component 130 includes an output part 131 and an output rod 132. The output part 131 is rotatably mounted on the output end of the drive motor 110. One end of the output rod 132 is rotatably connected to the output part 131, and the other end is rotatably connected to the connection between the swing rod 121 and one of the transmission rods 122. Figure 7 for Figure 5 The exploded view of the parallel transmission assembly 120 and the output assembly 130 shown is as follows. Figure 8 for Figure 5 The schematic diagram of the output component 130 shown is as follows. Figure 9 for Figure 8 The output component 130 shown is an exploded view.

[0076] The output component 131 is the component on which the output assembly 130 is installed. The output component 131 is rotatably mounted on the output end of the drive motor 110. One end of the output rod 132 is connected to one end of one of the swing rods 121 and one end of one of the transmission rods 122. The drive motor 110 drives the output component 131 to reciprocate, thereby enabling the output component 131 to drive the output rod 132 to reciprocate around the output component 131, so that the output rod 132 drives the swing rod 121 to swing back and forth, thereby driving the transmission rod 122 to move back and forth.

[0077] Thus, after the output component 131 and the output rod 132 are rotatably connected, the output component 131, the output rod 132 and the swing rod 121 can form a transmission structure similar to a crank connecting rod, so as to convert the rotational motion of the drive motor 110 into reciprocating linear motion, so as to drive the reciprocating swing motion of the swing rod 121 and the reciprocating movement of the transmission rod 122, thereby realizing the accurate transmission of power for the grease lubrication performance test of the bearing 70 under test.

[0078] See Figures 3 to 9In one embodiment, the output component 131 includes a mounting body 1311 and a connecting body 1312. The mounting body 1311 is rotatably disposed at the output end of the drive motor 110. The connecting body 1312 is disposed on a portion of the outer periphery of the mounting body 1311 and protrudes radially along the mounting body 1311. The connecting body 1312 is used to rotatably connect one end of the output rod 132. The mounting body 1311 and the connecting body 1312 form a cam structure, with the protruding portion of the cam being the connecting body 1312, which is rotatably connected to the output rod 132.

[0079] When the drive motor 110 drives the mounting body 1311 to rotate reciprocally, the mounting body 1311 can drive the connecting body 1312 to rotate reciprocally, and then the connecting body 1312 can drive the output rod 132 to move reciprocally, so as to drive the swing rod 121 to swing reciprocally and the transmission rod 122 to move reciprocally, so that the power of the drive motor 110 can be accurately transmitted to the swing rod 121. In this way, the swing rod 121 can accurately drive the swing ring 701 of the bearing under test 70 to rotate relative to the fixed ring 702 under this power, so as to perform a grease lubrication performance test on the bearing under test 70.

[0080] Of course, in other embodiments of this application, the output component 131 includes a mounting body 1311 and an output shaft. The mounting body 1311 is rotatably disposed on the output end of the drive motor 110, and the output shaft protrudes axially from the end face of the mounting body 1311. The axis of the output shaft is offset from the rotation axis of the mounting body 1311, and the output shaft is rotatably connected to one end of the output rod 132. Because the output shaft is offset from the rotation axis of the mounting body 1311, and the output shaft and the output rod 132 are rotatably connected, the mounting body 1311 and the output shaft can also form a cam-like structure.

[0081] In one embodiment, the output component 131 further includes a first rotating member (not shown). One end of the output component 131 has a first connecting hole (not shown), and one end of the output rod 132 has a second connecting hole (not shown). The first rotating member rotatably passes through the first connecting hole and the second connecting hole to rotatably connect the output component 131 and the output rod 132. The first rotating member is a hinge or a pivot, etc. In this way, after the first rotating member rotatably connects the output component 131 and the output rod 132, the output rod 132 can rotate around the output component 131, so that the output rod 132 can drive the swing rod 121 to swing back and forth.

[0082] In one embodiment, the output component 131 further includes a second rotating member (not shown). The other end of the output rod 132 has a first mounting hole (not shown), one end of the swing rod 121 has a second mounting hole (not shown), and one end of the transmission rod 122 has a third mounting hole (not shown). The second rotating member rotatably passes through the first mounting hole, the second mounting hole, and the third mounting hole to rotatably connect the output rod 132, the swing rod 121, and the transmission rod 122. The second rotating member is a hinge or a shaft, etc. Thus, after the second rotating member rotatably connects the output rod 132, the swing rod 121, and the transmission rod 122, when the output rod 132 moves, it can drive the swing rod 121 to swing back and forth and the transmission rod 122 to move back and forth.

[0083] It is worth noting that the rotatable connection in this application can all adopt the connection form of a first rotating part and a second rotating part. Of course, a shaft hole can also be provided on one part and a rotating shaft can be provided on the other part. The rotatable connection can be achieved by the cooperation of the shaft hole and the rotating shaft. This will not be elaborated further below.

[0084] See Figures 3 to 9 In one embodiment, the output component 130 further includes an eccentric component 133, which includes a mounting shaft 1331 and an eccentric shaft 1332. The mounting shaft 1331 is disposed at the output end of the drive motor 110, and the eccentric shaft 1332 is disposed on the mounting shaft 1331. The axis of the eccentric shaft 1332 is offset from the axis of the drive motor 110. The output component 131 is rotatably mounted on the eccentric shaft 1332. The drive motor 110 can drive the mounting shaft 1331 to rotate, which in turn drives the eccentric shaft 1332 to rotate, thereby causing the eccentric shaft 1332 to drive the output component 131 to rotate. Thus, when the output component 131 rotates, it can drive the swinging rod 121 to swing back and forth via the output rod 132.

[0085] See Figures 3 to 9 In one embodiment, the output component 130 further includes a mounting bearing 134. The inner ring of the mounting bearing 134 is fitted onto the output end of the drive motor 110, and the outer ring of the mounting bearing 134 is mounted in the output component 131. The outer ring of the mounting bearing 134 is rotatable relative to the inner ring, so that the output component 131 rotates around the output end of the drive motor 110. The mounting bearing 134 can stably support the output component 131 on the output end of the drive motor 110, and further support it on the eccentric shaft 1332 of the eccentric component 133. Thus, when the drive component drives the eccentric shaft 1332 to rotate, the eccentric shaft 1332 can drive the output component 131 to rotate through the mounting bearing 134. At the same time, the output component 131 also rotates relative to the eccentric component 133 through the mounting bearing 134.

[0086] In one embodiment, the transmission rod 122 is a long rod. That is, the transmission rod 122 is a single rod, with its two ends rotatably connected to the swing rod 121. In this way, motion transmission is achieved through the long transmission rod 122, ensuring the structural strength of the transmission rod 122. Of course, in other embodiments of this application, the transmission rod 122 may also include multiple connecting rods, which are connected in series to form the transmission rod 122. That is, the connecting rods are short rods, and multiple connecting rods are fixedly connected in series to form a longer transmission rod 122, through which motion transmission is achieved. This reduces processing difficulty and cost, and facilitates manufacturing.

[0087] See Figure 4 and Figure 5 In one embodiment, the swing rod 121 includes a fixed body 1211 and two connecting parts 1212. The two connecting parts 1212 are symmetrically arranged on both sides of the fixed body 1211 and are rotatably connected to two transmission rods 122 respectively. The fixed body 1211 is the main component of the swing rod 121 for fixing the swing ring 701 of the bearing 70 to be tested. The swing rod 121 has a fixing groove, which is provided on the surface of the fixed body 1211, and the swing ring 701 of the bearing 70 to be tested is installed in the fixing groove.

[0088] The connecting portions 1212 are symmetrically arranged on both sides of the fixed body 1211, and have a lug-like structure similar to the swing rod 121, so as to be rotatably connected to the transmission rod 122. Optionally, the connecting portions 1212 and the fixed body 1211 are reliably fixed by means of threaded connection or other means. Of course, in other embodiments of this application, the connecting portions 1212 and the fixed body 1211 may also be an integral structure.

[0089] In one embodiment, the drive mechanism 100 further includes an angle encoder (not shown), which is located at the output end of the drive motor 110 and is used to acquire the swing angle of the output motion of the drive motor 110. During the test, the angle encoder can monitor the swing angle of the output swing motion of the drive motor 110 in real time, and precisely control the swing angle of the output rod 132, the transmission rod 122, and the swing rod 121, thereby controlling the swing angle of the bearing under test 70 with an error better than 6%. Moreover, after the test is completed, the swing angle data in the angle encoder can be exported to determine whether there is any jamming in the swing of the bearing under test 70 during the test, so as to determine the grease lubrication performance of the bearing under test 70.

[0090] Optionally, the output swing angle of the drive motor 110 is in the range of 3° to 6°. After the drive motor 110 outputs the swing motion within the above swing angle range, it can drive the transmission rod 122 through the output rod 132 to drive the swing rod 121 and the swing ring 701 therein to swing back and forth. In this way, the swing ring 701 can drive the rolling element 703 to move slightly relative to the fixed ring 702, so as to evaluate the anti-fretting erosion performance of the grease under the reciprocating swing condition.

[0091] The drive mechanism 100 of this application uses an output component 130 to directly transmit the power of the drive motor 110 to the swing rod 121, so that the swing rod 121 drives the swing ring 701 of the bearing under test 70 to swing back and forth relative to the fixed ring 702, in order to perform a grease lubrication performance test on the bearing under test 70. In this way, the power of the drive motor 110 acts directly on the swing rod 121, reducing the power transmission path, improving the accuracy of power transmission, and improving transmission efficiency. At the same time, the swing rod 121 in the parallel transmission assembly 120 can drive another swing rod 121 to rotate through the transmission rod 122. It can accurately transmit torque under swing conditions without generating additional axial or normal forces, and thus will not generate structural impact forces on the parallel transmission assembly 120. This eliminates the need for a support to balance the additional forces, simplifies the structural complexity and control difficulty of the drive mechanism 100, improves the efficiency of the drive motor 110, and thus improves the test accuracy and repeatability. It is also conducive to realizing high-frequency reciprocating control of the bearing under test 70, thereby ensuring the accuracy of the test results.

[0092] See Figures 1 to 3 This application also provides a bearing testing machine 10 for grease-lubricated pseudo-cloth indentation and fretting abrasion, including a mounting frame 200, two testing mechanisms 300, two loading mechanisms 400, and a drive mechanism 100 as described in any embodiment. The two testing mechanisms 300 are spaced apart from each other on the mounting frame 200. A retaining ring 702 of a bearing 70 to be tested is installed in each testing mechanism 300. The two loading mechanisms 400 are spaced apart from each other on the mounting frame 200 and respectively load the corresponding testing mechanism 300. In the drive mechanism 100, a drive motor 110 is mounted on the mounting frame 200. A swing rod 121 is swingably mounted in the testing mechanism 300. The drive motor 110 drives the swing rod 121 through an output component 130 to rotate the bearing 70 to be tested in the testing mechanism 300, so that the parallel transmission component 120 drives another swing rod 121 to rotate the bearing 70 to be tested in the corresponding testing mechanism 300.

[0093] The grease-lubricated pseudo-cloth indentation and fretting abrasion bearing testing machine 10 of this application, after adopting the drive mechanism 100 of the above embodiment, can accurately transmit the force of the drive motor 110. At the same time, it 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 to set up a support body to balance the additional forces, simplifies the structural complexity and control difficulty, and improves the test accuracy and repeatability. It is also conducive to realizing high-frequency reciprocating control of the bearing 70 under test, thereby ensuring the accuracy of the test results.

[0094] It is worth noting that this application uses two testing mechanisms 300, each with two swing rods 121 installed. Additionally, each testing mechanism 300 can accommodate one bearing 70 to be tested, thereby increasing the number of test subjects. Furthermore, the two testing mechanisms 300 have identical structures; the following description will only use one of the testing mechanisms 300 as an example. Similarly, the two loading mechanisms 400 have identical structures; the following description will only use one of the loading mechanisms 400 as an example.

[0095] See Figures 1 to 3 Optionally, the loading mechanism 400 and the testing mechanism 300 are respectively located on opposite sides of the mounting frame 200, with the testing mechanism 300 positioned above the mounting frame 200 and the loading mechanism 400 positioned below the mounting frame 200 and connected to the testing mechanism 300. This allows for loading of the testing mechanism 300 while reducing the space occupied by the loading mechanism 400 above the mounting frame 200. Of course, in other embodiments of this application, the loading mechanism 400 may also be located above the testing mechanism 300.

[0096] See Figure 1 In one embodiment, the mounting frame 200 includes a frame body 210 and a protective cover 220. A drive mechanism 100, a testing mechanism 300, and a loading mechanism 400 are disposed on the frame body 210. A drive motor 110 is vertically disposed on the frame body 210 and is located on both sides of the frame body 210 along with a parallel transmission assembly 120. The protective cover 220 covers the parallel transmission assembly 120 and the testing mechanism 300. The frame body 210 serves as the main frame of the mounting frame 200, supporting the drive mechanism 100, the testing mechanism 300, and the loading mechanism 400. Optionally, the frame body 210 can be a support platform; of course, the frame body 210 can also be a frame structure or other structural form capable of providing support.

[0097] The drive motor 110 is located on the lower surface of the frame body 210 and in the space below the frame body 210. The parallel transmission assembly 120 is located above the frame body 210, and the output end of the drive motor 110 passes through the frame body 210 and is connected to the parallel transmission assembly 120. The testing mechanism 300 is located above the frame body 210, and the loading mechanism 400 is located below the frame body 210 and is located on the side of the drive motor 110.

[0098] The protective cover 220 serves a protective function. Located above the main frame 210, the protective cover 220 encloses the testing mechanism 300 and the parallel transmission assembly 120, protecting them from interference with other moving parts and ensuring the stability of the testing process. Simultaneously, it prevents dust and other debris from entering the testing mechanism 300 and the parallel transmission assembly 120.

[0099] See Figure 1 Optionally, the protective cover 220 has an openable and closable switch cover 221, which is provided corresponding to the testing mechanism 300. The switch cover 221 is rotatably disposed on the protective cover 220 to be rotatably opened or closed. When the switch cover 221 is open, the testing mechanism 300 is exposed, allowing operations such as loading or replacing the bearing 70 under test to be performed. When the switch cover 221 is closed, it covers the testing mechanism 300. Of course, in other embodiments of this application, the switch cover 221 may also be disposed on the protective cover 220 by means of sliding or other detachable methods.

[0100] Optionally, the number of switch covers 221 is equal to the number of test mechanisms 300. That is, each switch cover 221 corresponds to one 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 one loading mechanism 400. It is worth noting that the material and shape of the protective cover 220 are not limited in principle, as long as the protective cover 220 can provide protection. Optionally, the protective cover 220 is fixed to the frame body 210 using fasteners such as screws.

[0101] See Figure 1In one embodiment, the grease-lubricated sham indentation and fretting abrasion bearing testing machine 10 further includes an operating table 600, on which a host computer (not shown) is mounted, connected to a drive motor 110. The operating table 600 serves as a platform for the user to control the host computer, which is placed on the side of the operating table 600. This allows the user to operate the host computer from the side of the operating table 600, thereby controlling the various mechanisms within the grease-lubricated sham indentation and fretting abrasion bearing testing machine 10. Optionally, the operating table 600 and the mounting frame 200 are independently configured and located on the side of the mounting frame 200. Of course, in other embodiments of this application, the operating table 600 and the mounting frame 200 can also be an integral structure.

[0102] See Figure 2 , Figure 10 and Figure 11 In one embodiment, the testing mechanism 300 includes a support shaft 310 and a fixed seat 320. The support shaft 310 is disposed on the mounting frame 200 and extends through the swing rod 121. The fixed seat 320 is fixed to the support shaft 310 and is located on the side of the swing rod 121. A fixed ring 702 is installed in the fixed seat 320 and a swing ring 701 is installed in the swing rod 121. Figure 10 for Figure 1 The cross-sectional view of the grease-lubricated pseudo-cloth indentation and fretting abrasion bearing testing machine 10 at test mechanism 300 is shown. Figure 11 for Figure 10 The diagram shown is an exploded view of the test mechanism 300 with its outer casing removed.

[0103] A support shaft 310 is mounted on a vertical mounting frame 200. The support shaft 310 is arranged parallel to the drive motor 110, and extends through the swing rod 121. A fixed seat 320 is also mounted on the mounting frame 200, and is fixedly sleeved on the support shaft 310. The fixed seat 320 is positioned opposite the swing rod 121. The retaining ring 702 of the bearing 70 under test is located in the fixed seat 320, and the swing ring 701 is located in the swing rod 121. When the drive motor 110 drives the transmission rod 122 to reciprocate the swing rod 121, the swing rod 121 can drive the swing ring 701 to reciprocate relative to the retaining ring 702 in the fixed seat 320 via the rolling element 703.

[0104] It is worth noting that the structural form of the mounting base 320 is not limited in principle, as long as the mounting base 320 can be used to fix the retaining ring 702. Optionally, the mounting base 320 is disc-shaped and has a recessed mounting groove, into which the retaining ring 702 of the bearing 70 to be tested is fixedly installed.

[0105] See Figure 10 and Figure 11In one embodiment, there are two fixed seats 320, located on both sides of the swing rod 121, and each fixed seat 320 houses a bearing 70 to be tested. That is, the two fixed seats 320 are fixed to the support shaft 310, with one fixed seat 320 above the swing rod 121 and another fixed seat 320 below the swing rod 121. The upper fixed seat 320 cooperates with the swing rod 121 to install a bearing 70 to be tested, and the lower fixed seat 320 cooperates with the swing rod 121 to install a bearing 70 to be tested.

[0106] Specifically, the upper and lower surfaces of the swing rod 121 are respectively provided with fixing grooves. The upper bearing seat (i.e., fixing ring 702) of the upper bearing to be tested 70 is installed in the upper fixing seat 320, and the lower bearing seat (i.e., swing ring 701) of the upper bearing to be tested 70 is installed in the swing rod 121. The lower bearing seat (i.e., fixing ring 702) of the lower bearing to be tested 70 is installed in the lower fixing seat 320, and the upper bearing seat (i.e., swing ring 701) of the lower bearing to be tested 70 is installed in the swing rod 121. That is, the swing rod 121 connects the bearing seats (i.e., swing rings 701) of the two bearings to be tested 70 that are close to each other in the middle.

[0107] When the transmission rod 122 drives the swing rod 121 to swing back and forth, the swing rod 121 can drive the swing ring 701 of the upper and lower bearings under test to swing back and forth. In this way, one testing mechanism 300 can simultaneously perform grease lubrication tests on two bearings under test 70. Moreover, by driving different bearing seats of the two bearings under test 70 to swing back and forth, a comparative test can be conducted to determine the fretting wear of the two bearings under test 70 after the test.

[0108] When this application uses two testing mechanisms 300 to conduct grease lubrication tests, each testing mechanism 300 can simultaneously install two bearings 70 to be tested. Using two testing mechanisms 300, four bearings 70 to be tested can be tested simultaneously, increasing the number of test samples. Moreover, the bearings 70 to be tested in the two testing mechanisms 300 can also form a control group to determine the fretting wear of the bearings 70 on both sides.

[0109] See Figure 10 and Figure 11 In one embodiment, the testing mechanism 300 further includes a support member 330, which is sleeved on the support shaft 310 and supported between the fixed base 320 and the mounting frame 200. It is understood that the structural form of the support member 330 is not limited in principle, as long as the support member 330 can support the fixed base 320 onto the mounting frame 200. The support member 330 is located below the fixed base 320 and connected to it. The support member 330 is sleeved on the outside of the support shaft 310 and is also mounted on the mounting frame 200.

[0110] Optionally, the support member 330 includes a support base disposed between the fixed base 320 and the mounting frame 200, and sleeved on the support shaft 310. Optionally, the support member 330 also includes a plurality of support rods evenly distributed around the support shaft 310 and connecting the fixed base 320 and the mounting frame 200. Optionally, the support member 330 may also adopt a structure combining the support base and support rods. Of course, in other embodiments of this application, the support member 330 may also be a support frame or other structural form capable of providing support.

[0111] See Figure 1 and Figure 10 In one embodiment, the testing mechanism 300 further includes a testing housing 340, which is disposed on the mounting frame 200 and covers the support shaft 310 and the fixing seat 320. The testing housing 340 provides protection, covering the outside of the support shaft 310, the fixing seat 320, and the support member 330. This prevents interference between other components and the movement of the swing ring 701, and also prevents dust and other debris from entering, ensuring the accuracy of the test results. It is understood that the shape of the testing housing 340 is not limited in principle, as long as it provides protection.

[0112] See Figure 1 and Figure 10 In one embodiment, the test housing 340 includes a test base 342 and a test cover 341. The test base 342 is disposed on the mounting frame 200, and the test cover 341 covers the test base 342 to form a test space 343. The fixed seat 320, the swing rod 121, and the bearing 70 under test are located in the test space 343. The fixed seat 320 and the support rod are located in the test space 343, and the swing rod 121 and the bearing 70 under test are also tested in the test space 343. The test cover 341 can be opened or closed to facilitate the installation of the bearing 70 under test.

[0113] See Figure 1 , Figure 10 and Figure 11 In one embodiment, the grease-lubricated pseudo-cloth indentation and fretting abrasion bearing testing machine 10 further includes a temperature control mechanism 500, which is used to control the temperature of the bearing 70 under test. It is understood that the oscillation of the bearing 70 under test during the test will generate a certain amount of heat, which will cause the oscillating ring 701 and the fixed ring 702 to deform due to thermal expansion and contraction, affecting the accuracy of the test results. This 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.

[0114] See Figure 1 , Figure 10 and Figure 11In one embodiment, the temperature control mechanism 500 includes a temperature control cabinet 510 and a heat exchange component 520 connected to the temperature control cabinet 510. Each heat exchange component 520 corresponds to a fixed base 320. The temperature control cabinet 510 can control the heat exchange temperature of the heat exchange component 520 so that the heat exchange component 520 exchanges heat with the fixed base 320. One end of the heat exchange component 520 can be connected to the temperature control cabinet 510, and the other end of the heat exchange component 520 can extend into the test space 343 and be disposed on the fixed base 320. The temperature control cabinet 510 can control the heat exchange component 520 to exchange heat with the fixed base 320 so as to control the temperature of the bearing 70 under test.

[0115] The temperature control cabinet 510 can output a constant-temperature fluid to the heat exchange component 520. The heat exchange component 520 exchanges heat with the mounting base 320 through the constant-temperature fluid, and then with the bearing under test 70. The heat exchange component 520 can control the temperature of the bearing under test 70 through heat conduction and heat radiation. Moreover, each mounting base 320 corresponds to one heat exchange component 520, that is, each bearing under test 70 corresponds to one heat exchange component 520. The heat exchange component 520 can control the temperature of the corresponding mounting base 320 and the bearing under test 70, so that each bearing under test 70 can be independently controlled, which greatly improves the temperature control accuracy and flexibility, and thus ensures the accuracy of the test results.

[0116] Optionally, the temperature control cabinet 510 is an integrated high and low temperature unit, which can realize integrated high and low temperature control. For example, there are four heat exchange components 520, with one heat exchange component 520 corresponding to each fixed base 320, and two heat exchange components 520 are provided in each test space 343.

[0117] See Figure 1 , Figure 10 and Figure 11 In one embodiment, the heat exchange assembly 520 includes a circulation pipe 521, a control valve 523, and a heat exchange coil 522. The heat exchange coil 522 is mounted on a fixed base 320. The circulation pipe 521 connects the temperature control cabinet 510 and the heat exchange coil 522, and the control valve 523 is located on the circulation pipe 521. The heat exchange coil 522, mounted on the fixed base 320, can exchange heat and control the temperature of the fixed base 320 and the bearing 70 under test through heat radiation and heat conduction, thereby maintaining the bearing 70 under test at a constant temperature.

[0118] The circulation pipe 521 is connected to the temperature control cabinet 510, and the heat exchange coil 522 is connected to the circulation pipe 521. The control cabinet delivers the thermostatic fluid to the circulation pipe 521, which then delivers it to the heat exchange coil 522. After heat exchange, the fluid returns to the temperature control cabinet 510 via the circulation pipe 521 for temperature control, allowing for the next heat exchange cycle. A control valve 523 is located in the circulation pipe 521 to control the flow rate of the thermostatic fluid.

[0119] Furthermore, 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 under test. Simultaneously, the temperature control cabinet 510 can output constant-temperature fluids of different temperatures to multiple heat exchange components 520, enabling independent temperature control of each bearing 70 under test. Optionally, the heat exchange coil 522 is arranged around the mounting base 320. Of course, in other embodiments of this application, the heat exchange coil 522 can also be integrated into the mounting base 320. Optionally, the heat exchange coil 522 and the mounting base 320 are an integral structure. This facilitates the disassembly and replacement of the bearing 70 under test, reducing the number of parts.

[0120] In one embodiment, the temperature control mechanism 500 further includes a temperature sensor (not shown), which is mounted on the mounting base 320. The temperature sensor can detect the temperature of the mounting base 320 in real time and feed it back to the temperature control cabinet 510. The temperature control cabinet 510 controls the output temperature of the constant-temperature fluid based on the temperature feedback from the temperature sensor to ensure the temperature control accuracy of the bearing 70 under test. With the temperature sensor, the temperature control accuracy is approximately 0.1°C.

[0121] This application uses a temperature control cabinet 510 as the main temperature control setup. This cabinet 510 enables the circulation of a constant-temperature fluid and controls its temperature. Furthermore, each bearing 70 under test and its mounting base 320 corresponds to a heat exchange component 520, which can independently control the temperature of each bearing 70, greatly improving temperature control accuracy and flexibility. Optionally, the constant-temperature fluid can be a liquid or a gas. Moreover, when conducting tests at -20℃, rapid cooling and temperature maintenance are achieved by matching compressed air flow control with cooling strategy parameters.

[0122] See Figure 10 and Figure 11 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 200, abuts against the mounting frame 200, and is connected to the support shaft 310. The loading member can load the support shaft 310, and then load the bearing 70 under test through the support shaft 310 and the fixed seat 320, so that the bearing 70 under test can be tested under load.

[0123] In one embodiment, the loading element 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 located on the top of the support shaft 310, and the torque sensor 430 is located on the support shaft 310. The loading wrench 420 drives the support shaft 310 to rotate relative to the mounting frame 200 so that the loading element is loaded, and the load of the loading element is monitored by the torque sensor 430.

[0124] A disc spring 410 is sleeved on the support shaft 310 and located below the mounting frame 200. A loading wrench 420 is located on top of the support shaft 310. When the loading wrench 420 is operated, it can drive 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 can pull the support shaft 310 down, which in turn causes the support shaft 310 to drive the fixed seat 320 and the bearing under test 70 to move downwards, thereby loading the bearing under test 70.

[0125] Using disc spring 410 for loading can greatly reduce the volume of the loading mechanism 400 and the weight of the entire grease-lubricated pseudo-cloth indentation and fretting bearing testing machine 10, making the overall structure more compact and lightweight, and the operation simpler. As the test proceeds, wear in the contact area of ​​disc spring 410 may cause load fluctuations. Therefore, this application sets up a torque sensor 430 to monitor load changes in real time. If the load change exceeds the critical value, it can be finely adjusted during the test using a loading wrench 420.

[0126] Optionally, the loading mechanism 400 further includes a loading housing 450, which is located below the mounting frame 200 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 also includes a blocking member 440. The disc spring 410 is sleeved on the support shaft 310, with the top of the disc spring 410 abutting against the mounting frame 200. The blocking member 440 is located on the support shaft 310 and abuts against the bottom of the disc spring 410. The blocking member 440 and the mounting frame 200 limit the movement of the disc spring 410. Of course, in other embodiments of this application, the loading member is a hydraulic cylinder, a pneumatic cylinder, or a weight, or other structure capable of loading.

[0127] The grease-lubricated pseudo-cloth indentation and fretting abrasion bearing testing machine 10 of this application uses a parallel transmission assembly 120 to transmit the reciprocating motion of the drive motor 110 to the bearing 70 under test in the testing mechanism 300, thereby driving the swing ring 701 of the bearing 70 under test to swing back and forth relative to the fixed ring 702, realizing the grease lubrication performance test of the bearing 70 under test. The parallel transmission assembly 120 connects the bearing 70 under test in the testing mechanism 300 in a parallel transmission manner, which can accurately transmit torque under swing conditions without generating additional axial or normal forces, and thus will not generate structural impact forces on the parallel transmission assembly 120. In this way, there is no need to set up a support to balance the additional forces, simplifying the structural complexity and control difficulty of the drive mechanism 100, improving the efficiency of the drive motor 110, thereby improving the test accuracy and repeatability, facilitating the realization of high-frequency reciprocating control of the bearing 70 under test, and thus ensuring the accuracy of the test results.

[0128] The grease-lubricated fretting and erosion bearing testing machine 10 is used to evaluate the fretting performance of the grease in the bearing 70 under test. It can better simulate the actual service conditions of the bearing 70 under test, and realize the grease lubrication anti-fretting performance test under high and low temperature, heavy load, and small angle reciprocating oscillation conditions. Key parameters are provided with metrological support, and the test results have high repeatability. Moreover, the drive mechanism 100 realizes high-frequency reciprocating oscillation through a parallelogram structure to ensure the stability and accuracy of the test.

[0129] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above 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.

[0130] The embodiments described above are merely illustrative of several implementation methods of this application, and 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 those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A driving mechanism, characterized in that, This device is used in a bearing testing machine for grease-lubricated pseudo-cloth indentation and fretting abrasion, and is connected to the swing ring of the bearing under test. The driving mechanism includes: Drive motor; A parallel transmission assembly includes two swing rods and two transmission rods. Each swing rod is rotatably mounted in the testing mechanism of the grease-lubricated pseudo-cloth indentation and fretting abrasion bearing testing machine and is used to fix the swing ring of the bearing under test. The fixed ring of the bearing under test is fixed in the testing mechanism. The two swing rods and the two transmission rods are arranged in parallel. The two ends of each swing rod are rotatably connected to the two transmission rods, making the parallel transmission assembly a parallelogram. An output component, one end of which is rotatably connected to the output end of the drive motor, and the other end of which is rotatably connected to the connection between the swing rod and one of the transmission rods, wherein the drive motor drives the swing rod to move the transmission rod, so that the two swing rods simultaneously drive the swing ring of the bearing under test to rotate relative to the fixed ring.

2. The driving mechanism according to claim 1, characterized in that, The output assembly includes an output component and an output rod. The output component is rotatably mounted on the output end of the drive motor. One end of the output rod is rotatably connected to the output component, and the other end is rotatably connected to the connection between the swing rod and one of the transmission rods.

3. The driving mechanism according to claim 2, characterized in that, The output component includes a mounting body and a connecting body. The mounting body is rotatably disposed on the output end of the drive motor. The connecting body is disposed on a portion of the outer periphery of the mounting body and protrudes radially along the mounting body. The connecting body is used to rotatably connect one end of the output rod. Alternatively, the output component includes a mounting body and an output shaft. The mounting body is rotatably disposed at the output end of the drive motor, and the output shaft protrudes axially from the end face of the mounting body. The axis of the output shaft is offset from the rotation axis of the mounting body, and the output shaft is rotatably connected to one end of the output rod.

4. The driving mechanism according to claim 2, characterized in that, The output component further includes a first rotating member. One end of the output component has a first connecting hole, and one end of the output rod has a second connecting hole. The first rotating member is rotatably passed through the first connecting hole and the second connecting hole to rotatably connect the output component and the output rod. And / or, the output component further includes a second rotating member, the other end of the output rod having a first mounting hole, one end of the swing rod having a second mounting hole, and one end of the transmission rod having a third mounting hole. The second rotating member is rotatably passed through the first mounting hole, the second mounting hole, and the third mounting hole to rotatably connect the output rod, the swing rod, and the transmission rod.

5. The driving mechanism according to claim 2, characterized in that, The output component further includes an eccentric component, which includes a mounting shaft and an eccentric shaft. The mounting shaft is disposed at the output end of the drive motor, and the eccentric shaft is disposed on the mounting shaft. The axis of the eccentric shaft is offset from the axis of the drive motor, and the output component is rotatably mounted on the eccentric shaft. And / or, the output component further includes a mounting bearing, the inner ring of which is fitted onto the output end of the drive motor, and the outer ring of which is mounted in the output component. The outer ring of the mounting bearing is rotatable relative to the inner ring, so that the output component rotates about the output end of the drive motor.

6. A bearing testing machine for grease-lubricated pseudo-cloth indentation and fretting abrasion, characterized in that, It includes a mounting frame, two testing mechanisms, two loading mechanisms, and a drive mechanism as described in any one of claims 1 to 5; Two test mechanisms are spaced apart on the mounting frame, and a retaining ring of a bearing to be tested is installed in each test mechanism. Two loading mechanisms are spaced apart on the mounting frame and respectively load the corresponding test mechanism. The drive mechanism has a drive motor mounted on a frame, and a swing rod is swingably mounted in the test mechanism. The drive motor drives the swing rod through an output component to rotate the bearing under test in the test mechanism, so that the parallel transmission component drives another swing rod to rotate the bearing under test in the corresponding test mechanism.

7. The grease-lubricated pseudo-cloth indentation and fretting abrasion bearing testing machine according to claim 6, characterized in that, The testing mechanism includes a support shaft and a fixed seat. The support shaft is mounted on the mounting frame and extends through the swing rod. The fixed seat is fixed to the support shaft and located on the side of the swing rod. The fixed seat is equipped with the fixed ring, and the swing ring is equipped with the swing rod. There are two fixed seats, located on both sides of the swing rod, and one bearing to be tested is installed in each fixed seat; And / or, the testing mechanism further includes a support member, which is sleeved on the support shaft and supported between the fixed base and the mounting frame; And / or, the testing mechanism further includes a testing housing, which is disposed on the mounting frame and covers the support shaft and the fixed seat. The testing housing includes a testing base and a testing top cover. The testing base is disposed on the mounting frame, and the testing top cover is disposed on the testing base to enclose a testing space. The fixed seat, the swing rod, and the bearing to be tested are located in the testing space.

8. The bearing testing machine for grease-lubricated pseudo-cloth indentation and fretting abrasion according to claim 7, characterized in that, The grease-lubricated pseudo-cloth indentation and fretting abrasion bearing testing machine also includes 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 fixed base. The temperature control cabinet can control the heat exchange temperature of the heat exchange component, so that the heat exchange component exchanges heat with the fixed base. The heat exchange assembly includes a circulation pipeline, a control valve, and a heat exchange coil. The heat exchange coil is mounted on the fixed base. The circulation pipeline connects the temperature control cabinet and the heat exchange coil. The control valve is mounted on the circulation pipeline. And / or, the temperature control mechanism further includes a temperature sensor, which is mounted on the fixed base.

9. The bearing testing machine for grease-lubricated pseudo-cloth indentation and fretting abrasion according to claim 7, characterized in that, The loading mechanism includes a loading member connected to the support shaft to load the support shaft; The loading element is a disc spring, which is sleeved on the support shaft. The loading mechanism also includes a loading wrench and a torque sensor. The loading wrench is located on the top of the support shaft, and the torque sensor is located on the support shaft. The loading wrench drives the support shaft to rotate relative to the mounting frame so that the loading element is loaded, and the load of the loading element is monitored by the torque sensor. Alternatively, the loading element may be a hydraulic cylinder, a pneumatic cylinder, or a weight.

10. The grease-lubricated pseudo-cloth indentation and fretting abrasion bearing testing machine according to any one of claims 6 to 9, characterized in that, The mounting frame includes a frame body and a protective cover. The drive mechanism, the testing mechanism and the loading mechanism are located on the frame body. The drive motor is located vertically on the frame body 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. The protective cover has an openable or closable switch cover, which is provided corresponding to the testing mechanism. And / or, the grease-lubricated pseudo-cloth indentation and fretting abrasion bearing testing machine further includes an operating table, the operating table being equipped with a host computer, the host computer being connected to the drive motor.

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