Grease lubrication pseudo-cloth indentation and fretting abrasion bearing testing machine

Abstract

The invention relates to a grease lubrication pseudo-cloth indentation and fretting abrasion bearing testing machine. The machine comprises a mounting rack; the driving mechanism comprises a driving motor and a parallel transmission assembly, the driving motor is arranged on the mounting rack, and the parallel transmission assembly is connected with the output end of the driving motor and the swing ring of the bearing to be tested in parallel; the testing mechanism is arranged on the mounting rack and is used for mounting a fixing ring of the bearing to be tested; the loading mechanism is arranged on the mounting rack and is used for loading the testing mechanism; the driving motor drives the parallel transmission assembly to drive the to-be-tested bearing to swing back and forth in the testing mechanism. The parallel transmission assembly is connected with the to-be-tested bearing in the testing mechanism in a parallel transmission mode, torque is accurately transmitted under the swinging condition, additional axial force or normal force cannot be generated, structural impact force cannot be generated, a supporting body does not need to be arranged to balance the additional force, and the testing efficiency is improved. The structure complexity and the control difficulty of the driving mechanism are simplified, the test precision and repeatability are improved, and the accuracy of a test result is ensured.

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-motion abrasion bearing testing machine. Background Art

[0002] Large slewing bearings mainly work under low speed and 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] At present, the research and production technology of large slewing bearings is relatively mature, and the domestic and foreign markets are in oversupply. How to extend the service life, improve service performance, and reduce operation and maintenance costs have become the most important core competitiveness of 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 in the future. Accordingly, the blade size will be further increased and the wind turbine structure will be more compact. The demand for improving the service life and service reliability of yaw and pitch bearings (typical large slewing bearings) is also imminent.

[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 levels. All major bearing manufacturers and even OEMs have focused their attention on the selection of matching grease. Therefore, the improvement of grease wear resistance and friction reduction has become a battleground for lubrication product suppliers. Regarding the evaluation of grease lubrication performance under low-speed and heavy-load conditions, there is a very critical indicator, which is the anti-fretting performance. Fretting is one of the most typical failure forms in large slewing bearings, which may cause serious cracks, oxidation, fatigue peeling, and then cause accidents.

[0005] At present, when evaluating the micro-abrasion performance, the connection between the driving shaft of the test system and the test mechanism is a single-axis connection, which has structural impact force and requires an additional mechanical structure for balance. The structure is complex and introduces additional power consumption, which is not conducive to achieving high-precision high-frequency reciprocating control. Moreover, the test results of the test system are not repeatable, which is probably caused by 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 driving 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, thereby improving the test accuracy and repeatability, and 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 comprises a driving motor and a parallel transmission assembly, wherein the driving motor is arranged on the mounting frame, and the parallel transmission assembly connects the output end of the driving motor and the swing ring of the bearing to be tested in parallel;

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

[0011] A loading mechanism, disposed 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, 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 test mechanism;

[0014] The two transmission rods are arranged in parallel, the output rod is provided at the output end of the driving 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 parts, the two connecting parts 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 test mechanisms is two and they 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, and the two swing rods and the two transmission rods are arranged to form a parallelogram;

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

[0019] In one embodiment of the present application, the testing mechanism includes a supporting shaft and a fixing seat, the supporting shaft is arranged on the mounting frame and extends through the swing arm, the fixing seat is fixed to the supporting shaft and is located on the side of the swing arm, the fixing ring is installed in the fixing 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 comprises a plurality of clamping members and a mounting ring, and the mounting ring is disposed on the fixing seat;

[0021] The plurality of clamping members are evenly distributed along the circumference of the mounting ring, and each of the clamping members is movably disposed in the mounting ring along the radial direction and can abut against the outer wall of the fixing 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 supporting member, wherein the supporting member is sleeved on the supporting 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 supporting shaft and the fixing seat, the testing shell includes a testing base and a testing cover, the testing base is arranged on the mounting frame, the testing cover is covered on the testing base to enclose a testing space, and the fixing seat, the swing rod 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 micro-abrasion bearing testing machine further comprises a temperature control mechanism, and the temperature control mechanism 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 exchanges heat with the fixing seat;

[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, and the loading member is 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 so that the loading member is loaded, 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 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 together with the parallel transmission assembly, the protective cover covers the parallel transmission assembly and the testing mechanism, the protective cover has a switch cover that can be opened or closed, and the switch cover is arranged corresponding to the testing mechanism;

[0032] And / or, the grease-lubricated pseudo-cloth indentation and micro-abrasion bearing testing machine further comprises 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 tester of the present application has a driving motor of a driving mechanism arranged on a mounting frame, a parallel transmission assembly parallelly connecting the output end of the driving motor and the swing ring of the bearing to be tested, a testing mechanism arranged on the mounting frame, a fixed ring of the bearing to be tested arranged in the testing mechanism, a loading mechanism arranged on the mounting frame, and loading the testing mechanism, and then loading the bearing to be tested in the testing mechanism. When testing the bearing to be tested, the driving motor drives the parallel transmission assembly to drive the swing ring of the bearing to be tested to swing back and forth relative to the fixed ring in the testing mechanism.

[0035] The grease lubricated pseudo-cloth indentation and micro-abrasion bearing tester uses a parallel transmission component to transmit the reciprocating motion of the drive motor to the bearing to be tested in the test mechanism, so as to drive the swing ring of the bearing to be tested to swing back and forth relative to the fixed ring, thereby realizing the grease lubrication performance test of the bearing to be tested. The parallel transmission component uses a parallel transmission method to connect the bearing to be tested in the test mechanism. It can accurately transmit torque under swinging conditions without generating additional axial force or normal force, and thus will not generate structural impact force on the parallel transmission component. In this way, there is no need to set up a support body to balance the additional force, simplifying the structural complexity and control difficulty of the drive mechanism, improving the efficiency of the drive motor, and thus improving the test accuracy and repeatability, which is conducive to realizing high-frequency reciprocating control of the bearing to be tested, thereby ensuring the accuracy of the test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a three-dimensional diagram of a grease-lubricated pseudo-cloth indentation and micro-abrasion 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 shown 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 of the grease lubricated pseudo-cloth indentation and fretting wear bearing testing machine shown.

[0039] Figure 4 for Figure 2 A three-dimensional view 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 schematic diagram of the test structure shown is shown with the test housing removed.

[0043] Figure 8 for Figure 7 A schematic diagram of a test mechanism in which a clamping and centering assembly is arranged on a fixed seat is shown.

[0044] Among them: 10, grease lubricated pseudo cloth indentation and micro-abrasion bearing tester; 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 part; 300, testing mechanism; 310, supporting shaft; 320, fixing seat; 330, clamping and centering assembly; 331, Clamping part; 332, mounting ring; 340, supporting 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] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0046] In the description of the present 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 the present 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 the present application.

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

[0048] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0049] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "on" or "below" a second feature, etc., or the like, 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 obliquely above the second feature, or simply means that the first feature is higher in 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 obliquely below the second feature, or simply means that the first feature is lower in 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 a central 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 a central element at the same time. 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 implementation method.

[0051] It is understandable that large slewing bearings mainly work under low-speed and heavy-load conditions, bearing large loads and torques, and generally use grease as the internal lubricating medium of the bearings. Regarding the evaluation of the grease lubrication performance of large slewing bearings under low-speed and heavy-load conditions, there is a very critical indicator, which is the anti-fretting performance. At present, when evaluating the fretting performance of bearings, the connection between the drive shaft of the test system and the test mechanism is a single-axis connection, which has structural impact force and requires additional mechanical structure for balance. The structure is complex, and the test results of the test system are not repeatable, and the accuracy of the test results cannot be guaranteed.

[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 abrasion bearing tester 10 shown in the figure is a schematic diagram without the test housing 350 and the protective cover 120. The grease lubricated pseudo-fabric indentation and fretting abrasion bearing tester 10 can test the grease lubrication performance of the bearing 70 to be tested, so as to evaluate the anti-fretting abrasion performance and pseudo-fabric indentation of the bearing 70 to be tested when grease is used for lubrication, thereby evaluating the performance of the grease to meet the service life, reliability and other requirements of the bearing 70 to be tested. Of course, in other embodiments of the present application, the grease lubricated pseudo-fabric indentation and fretting abrasion bearing tester 10 can also evaluate other properties of the grease, which will not be repeated here.

[0053] The grease-lubricated pseudo-fabric indentation and micro-motion abrasion bearing tester 10 can accurately transmit torque during the test without generating additional axial force or normal force, and thus will not generate structural impact force. In this way, there is no need to set a support body to balance the additional force, simplifying the structural complexity and control difficulty, thereby improving the test accuracy and repeatability, and facilitating high-frequency reciprocating control of the bearing 70 to be tested, thereby ensuring the accuracy of the test results. The specific structure of the grease-lubricated pseudo-fabric indentation and micro-motion abrasion bearing tester 10 of an embodiment is introduced below.

[0054] The grease lubricated pseudo-cloth indentation and micro-abrasion bearing testing machine 10 can test the bearing 70 to be tested, and 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 multiple rolling bodies 703, and the multiple rolling bodies 703 are arranged between the two shaft seats. The two shaft seats are a swing ring 701 and a fixed ring 702, respectively. The swing ring 701 can swing, and the fixed ring 702 is fixed. When the swing ring 701 swings, it can drive the rolling body 703 to move synchronously, and the fixed ring 702 will not move with the swing ring 701 and the rolling body 703. During the test, the bearing 70 to be tested is arranged in the vertical direction, and the upper shaft seat can be the swing 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 swing ring 701.

[0055] A certain amount of grease (test sample) is filled in the bearing 70 to be tested. The grease-lubricated pseudo-indentation and fretting abrasion bearing tester 10 of the present 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 make reciprocating swing motions at a certain angle to produce fretting abrasion (pseudo-indentation may also be reflected when the wear is very slight). 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 judge the quality of the grease's anti-fretting abrasion 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-abrasion bearing testing machine 10 includes a mounting frame 100, a driving 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 arranged on the mounting frame 100. The parallel transmission assembly 220 connects the output end of the driving motor 210 and the swing ring 701 of the bearing to be tested 70 in parallel. The testing mechanism 300 is arranged on the mounting frame 100 and is used to install a fixing ring 702 of the bearing to be tested 70. The loading mechanism 400 is arranged on the mounting frame 100 and loads the testing mechanism 300. The driving motor 210 drives the parallel transmission assembly 220 to drive 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 retained on one side of the grease lubricated pseudo-cloth indentation and fretting wear bearing testing machine 10 is shown.

[0057] The mounting frame 100 is a supporting frame of the grease-lubricated pseudo-fabric indentation and micro-motion abrasion bearing testing machine 10. Each mechanism in the grease-lubricated pseudo-fabric indentation and micro-motion abrasion bearing testing machine 10 is arranged in the mounting frame 100. The mounting frame 100 supports each mechanism of the grease-lubricated pseudo-fabric indentation and micro-motion abrasion bearing testing machine 10, so that each mechanism of the grease-lubricated pseudo-fabric indentation and micro-motion abrasion bearing testing machine 10 can operate stably. The driving mechanism 200 is a power component of the grease-lubricated pseudo-fabric indentation and micro-motion abrasion bearing testing machine 10. The driving mechanism 200 can output reciprocating swinging motion to drive the swing ring 701 of the bearing 70 to be tested to swing back and forth, thereby realizing the grease lubrication performance test of 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 70 to be tested 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 70 to be tested in the testing mechanism 300. In this way, the bearing 70 to be tested can swing back and forth under the load of the loading mechanism 400 to simulate the grease lubrication performance of the bearing 70 to be tested under the loading condition, so as to obtain the anti-micro-abrasion performance of the bearing 70 to be tested, so as to obtain the wear resistance and friction reduction performance of the grease used for the bearing 70 to be tested.

[0059] The loading mechanism 400 can apply different loads to the test mechanism 300 and the bearing 70 to be tested to simulate the grease lubrication performance of the bearing 70 to be tested under different load conditions. In addition, the driving mechanism 200 is connected to the swing ring 701 of the bearing 70 to be tested, and the fixed ring 702 of the bearing 70 to be tested is installed in the test mechanism 300, and the swing ring 701 and the fixed ring 702 are supported by the rolling body 703. When the driving mechanism 200 outputs a reciprocating swing motion, it can drive the swing ring 701 to swing back and forth relative to the fixed ring 702 and the test mechanism 300 through the rolling body 703.

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

[0061] In this way, when the driving motor 210 outputs a reciprocating swinging motion, the driving motor 210 can drive the parallel transmission assembly 220 to move, and then the parallel transmission assembly 220 can drive the swing ring 701 of the bearing to be tested 70 to swing back and forth relative to the fixed ring 702. In addition, the driving motor 210 transmits the force to the swing ring 701 of the bearing to be tested 70 through the parallel transmission assembly 220, and at the same time, the force can be transmitted back to the driving motor 210 through the parallel arrangement relationship, so that the bearing to be tested 70 is in a state of force balance.

[0062] When the driving motor 210 drives the parallel transmission assembly 220 to drive the bearing 70 to swing back and forth, the loading mechanism 400 loads the bearing 70 to be tested through the testing mechanism 300 to implement the grease lubrication performance test of the bearing 70 to be tested. Since the parallel transmission assembly 220 is balanced in force transmission, no additional axial force or normal force is generated, so the bearing 70 to be tested does not need to use an additional support body to parallel the additional force, thereby making the structure of the driving mechanism 200 simple and compact, and does not need to overcome additional friction or structural force, thereby improving the efficiency of the driving motor 210, and greatly improving the test accuracy and repeatability of the test results.

[0063] The grease lubricated pseudo-cloth indentation and micro-abrasion bearing tester 10 of the above-mentioned embodiment uses 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, so as to drive the swing ring 701 of the bearing 70 to be tested to swing back and forth relative to the fixed ring 702, thereby realizing the grease lubrication performance test of the bearing 70 to be tested. The parallel transmission assembly 220 uses a parallel transmission method to connect the bearing 70 to be tested in the test mechanism 300. It can accurately transmit torque under swinging conditions 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, simplify the structural complexity and control difficulty of the drive mechanism 200, improve the efficiency of the drive motor 210, and thus improve the test accuracy and repeatability, which is conducive to realizing 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 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-abrasion bearing testing machine 10.

[0065] See also Figures 1 to 3 Optionally, the driving motor 210 is arranged below the mounting frame 100 in the vertical direction, the testing mechanism 300 is located above the mounting frame 100 and on the side of the driving motor 210, and the bearing 70 to be tested in the testing mechanism 300 is driven to swing back and forth through the parallel transmission assembly 220. In other words, the driving motor 210 is placed vertically, and the driving motor 210 can provide high-frequency reciprocating swinging motion around the Z axis in the XY plane, and the high-frequency reciprocating swinging motion is transmitted to the bearing 70 to be tested through the parallel transmission assembly 220, and the bearing 70 to be tested can perform high-frequency reciprocating swinging motion around the Z axis in the XY plane.

[0066] See also Figures 1 to 3 Optionally, the loading mechanism 400 and the testing mechanism 300 are arranged on both sides of the mounting frame 100, the testing mechanism 300 is located above the mounting frame 100, and the loading mechanism 400 is located below the mounting frame 100 and connected to the testing mechanism 300. In this way, while satisfying the requirement of loading the testing mechanism 300, the space occupied by the loading mechanism 400 above the mounting frame 100 can also be reduced. Of course, in other embodiments of the present application, the loading mechanism 400 can also be arranged 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 driving mechanism 200, the testing mechanism 300 and the loading mechanism 400 are arranged on the frame body 110, the driving motor 210 is arranged on the frame body 110 in the vertical direction, and is located on both sides of the frame body 110 with the parallel transmission assembly 220, and 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 the driving mechanism 200, the testing mechanism 300 and the loading mechanism 400 are supported by the frame body 110. Optionally, the frame body 110 is a supporting platform, and of course, the frame body 110 can also be a frame structure or other structural forms that can provide support.

[0068] The driving 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. The output end of the driving 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. The loading mechanism 400 is located below the frame body 110 and is disposed on the testing mechanism 300. The testing mechanism 300 and the loading mechanism 400 are located on the side of the driving motor 210.

[0069] The protective cover 120 plays a protective role. The protective cover 120 is arranged above the frame body 110. The protective cover 120 can cover the test mechanism 300 and the parallel transmission assembly 220. The protective cover 120 protects the parallel transmission assembly 220 and the test mechanism 300 to prevent other moving parts from interfering with the movement of the parallel transmission assembly 220, thereby ensuring the stability of the test process. At the same time, it can also prevent 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 set corresponding to the test mechanism 300. The switch cover 121 can be rotatably arranged 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 arranged 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. Moreover, the number of test mechanisms 300 is also equal to the number of loading mechanisms 400, and each test mechanism 300 corresponds to a loading mechanism 400. It is worth noting that the material and shape of the protective cover 120 are not limited in principle, as long as the protective cover 120 can play a protective role. Optionally, the protective cover 120 is fixed to the frame body 110 by fasteners such as screws.

[0072] See also Figures 1 to 3 In one embodiment, the grease lubricated pseudo-cloth indentation and micro-motion abrasion bearing tester 10 further includes an operating table 600, on which a host computer is arranged, 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, and the host computer is placed on the operating table 600, and is used to operate the host computer at the side of the operating table 600, thereby realizing the control of each mechanism in the grease lubricated pseudo-cloth indentation and micro-motion abrasion bearing tester 10. Optionally, the operating table 600 is independently arranged from 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 70 to be tested, and the fixed ring 702 of the bearing 70 to be tested is fixed in the testing mechanism 300; the two transmission rods 221 are arranged in parallel, the output rod 222 is arranged at the output end of the driving motor 210, the swing rod 223 is arranged in parallel with the output rod 222, and the output rod 222 and the swing rod 223 can be rotatably connected to the two transmission rods 221 respectively, 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-abrasion 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 a component provided at the output end of the driving motor 210, and the swing rod 223 is a component for installing the swing ring 701 of the bearing 70 to be tested. The output rod 222 and the swing rod 223 are arranged in parallel and spaced apart, and the two transmission rods 221 are arranged in parallel and spaced apart. The two ends of the output rod 222 are rotatably connected to the two transmission rods 221, and the two ends of the swing rod 223 are also rotatably connected to the transmission rods 221. At this time, the output rod 222, the swing rod 223 and the two transmission rods 221 are rotatably connected in sequence to form a parallelogram structure, so that the parallel transmission assembly 220 is a parallelogram as a whole.

[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 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 realizes the reciprocating transmission of motion through the two transmission rods 221 arranged in parallel, and the two transmission rods 221 can parallel the force of the bearing 70 to be tested when it swings back and forth, and can realize the stable support of the bearing 70 to be tested. That is, the driving motor 210 and the bearing 70 to be tested are connected in a double-axis manner, and the movement directions of the two transmission rods 221 are opposite to each other, so as to balance the force on the bearing 70 to be tested.

[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 70 to be tested through the transmission rod 221, the swing rod 223, the output rod 222 and the rotatable connection. The bearing 70 to be tested 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. The efficiency of the drive motor 210 is improved, and the test accuracy and repeatability are also greatly improved.

[0078] See also Figures 1 to 4 In one embodiment, the number of the testing mechanisms 300 is two and they are symmetrically arranged on the mounting frame 100. The parallel transmission assembly 220 includes two swing 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 swing rods 223. The two swing rods 223 and the two transmission rods 221 are arranged to form a parallelogram.

[0079] The two test mechanisms 300 are symmetrically arranged on both sides of the drive motor 210, and both ends of the parallel transmission assembly 220 extend into the two test mechanisms 300, and the bearings 70 to be tested in the two test mechanisms 300 are respectively installed. In other words, the drive motor 210 can be connected to the bearings 70 to be tested in the two test mechanisms 300 through 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 can be rotatably connected to the two transmission rods 221. The two ends of the two transmission rods 221 are respectively connected to a swing rod 223, and each swing rod 223 is located in a test mechanism 300 and is used to install the bearing 70 to be tested in the corresponding test mechanism 300. At this time, the two swing rods 223 and the two transmission rods 221 form a parallelogram structure, and the output rod 222, as the power output of the driving motor 210, drives the transmission rod 221 to drive the two swing rods 223 to swing back and forth.

[0081] In this way, the output rod 222 realizes reciprocating transmission of motion through two parallel transmission rods 221. This parallelogram design can realize accurate transmission of torque under swinging conditions without additional axial force or normal force. The power is directly connected to the bearing 70 to be tested in the middle of the swing rod 223 through the transmission rod 221. The bearing 70 to be tested does not need an additional support body to balance the additional force. It is worth noting that the principle of the two test mechanisms 300 is essentially the same as that of the one test mechanism 300, and the structures of the two test mechanisms 300 are also exactly the same. Only one of the test mechanisms 300 is described here.

[0082] In one embodiment, the drive mechanism 200 further includes an angle encoder, which is disposed at the output end of the drive motor 210 and is used to collect 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, and accurately control 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 to be tested, with an error of less than 6%. Moreover, after the test is completed, the swing angle data in the angle encoder can also be exported to determine whether there is a stagnation in the swing of the bearing 70 to be tested during the test, so as to determine the grease lubrication performance of the bearing 70 to be tested.

[0083] Optionally, the range of the swing angle output by the drive motor 210 is 3° to 6°. After the drive motor 210 outputs the swing motion within the above swing angle range, it can drive the transmission rod 221 through the output rod 222 to drive the swing rod 223 and the swing ring 701 therein to swing back and forth, and then the swing ring 701 can drive the rolling body 703 to fretting relative to the fixed ring 702, so as to evaluate the anti-fretting abrasion performance of the grease under the reciprocating swing condition.

[0084] See also Figure 4 and Figure 5 In one embodiment, the output rod 222 is a parallelogram 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 is arranged in parallel with the swing rod 223. Optionally, both ends of the output rod 222 have a first rotation hole, the transmission rod 221 has a second rotation hole corresponding to the first rotation hole, and the parallel transmission assembly 220 further includes a rotating shaft, which passes through the first rotation hole and is installed in the second rotation hole to realize the rotatable connection between the output rod 222 and the transmission rod 221.

[0085] Optionally, the output rod 222 has a first connection edge at both ends, the first rotation hole is set through the first connection edge, the transmission rod 221 has a first matching plane, the second rotation hole is set on the first matching plane, the first matching plane is in contact with the first connection edge, so that the first rotation hole and the second rotation hole are coaxial to install the rotating shaft. Optionally, the number of the first connection edges is two, the two first connection edges are spaced to form a connection groove, the second rotation hole passes through the transmission rod 221, and the part of the transmission rod 221 that matches the output rod 222 is located in the connection groove to ensure the reliability of the rotation 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 a plurality of connecting rods, and the plurality of connecting rods are connected in series to form the transmission rod 221. That is, the connecting rod is a short rod, and the plurality of connecting rods are fixedly connected in series to form a longer transmission rod 221, and the motion is transmitted through the longer transmission rod 221. In this way, the processing difficulty and cost can be reduced, and the processing and molding are convenient.

[0087] See also Figure 4 and Figure 5 In one embodiment, the swing lever 223 includes a fixed body 2231 and two connecting parts 2232. The two connecting parts 2232 are symmetrically arranged on both sides of the fixed body 2231 and are rotatably connected to the two transmission levers 221. The fixed body 2231 is the main part of the swing lever 223 to fix the swing ring 701 of the bearing 70 to be tested. The swing lever 223 has a fixing groove, which is arranged on the surface of the fixed body 2231. The swing ring 701 of the bearing 70 to be tested is installed in the fixing groove.

[0088] The connecting portion 2232 is symmetrically arranged on both sides of the fixed body 2231, and is a structure similar to a lug of the swinging rod 223, so as to be rotatably connected with the transmission rod 221. Optionally, the connecting portion 2232 and the fixed body 2231 are reliably fixed by means of a threaded connection or the like. Of course, in other embodiments of the present application, the connecting portion 2232 and the fixed body 2231 may also be an integral structure.

[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 at the connection portion 2232, the second adapter 225 is disposed at the end of the transmission rod 221, and the rotating member 226 can rotatably connect the first adapter 224 and the second adapter 225. The first adapter 224 and the second adapter 225 are vertically disposed, and the rotating member 226 penetrates the first adapter 224 and the second adapter 225 to rotatably connect the first adapter 224 and the second adapter 225, thereby realizing the rotational connection between the transmission rod 221 and the swing 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, the U-shaped first adapter 224 is mounted on the connecting shaft, the second adapter 225 is arranged in a straight line, 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, and the rotating member 226 can be rotatably arranged to penetrate the first adapter 224 and the second adapter 225. Optionally, the first adapter 224 and the second adapter 225 can also be a flat plate structure or a structure similar to a universal joint.

[0092] In another embodiment, the parallel transmission assembly 220 further includes a hinge, which hinges the transmission rod 221 and the connecting portion 2232. In other words, the hinge directly passes through the ends of the transmission rod 221 and the connecting portion 2232, and the hinge directly rotatably connects the transmission rod 221 and the connecting portion 2232. In this way, the number of connecting portions 2232 between the swing rod 223 and the transmission rod 221 can be reduced, thereby reducing the generation of friction.

[0093] Optionally, the end of the swinging rod 223 has a second connection edge, the third rotation hole is provided at the second connection edge, the second connection edge is provided at the connection portion 2232, the end of the transmission rod 221 has a second matching plane, the fourth rotation hole is provided at the second matching plane, the second connection edge fits the second matching plane, so that the third rotation hole and the fourth rotation hole are coaxial, so as to install the hinge. Optionally, the number of the second connection edges is two, the two second connection edges are spaced to form a connection groove, the fourth rotation hole passes through the transmission rod 221, the end of the transmission rod 221 is located in the second connection groove, and the hinge extends through a second connection edge, the transmission rod 221 and another second connection edge, so as to ensure the reliability of the rotation connection between the swinging rod 223 and the transmission rod 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 hinged 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 supporting shaft 310 and a fixing seat 320. The supporting shaft 310 is disposed on the mounting frame 100 and extends through the swing rod 223. The fixing seat 320 is fixed to the supporting shaft 310 and is located on the side of the swing rod 223. A fixing ring 702 is installed in the fixing seat 320, and a swing ring 701 is installed on the swing 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] The support shaft 310 is arranged along the vertical direction of the mounting frame 100, the support shaft 310 is arranged in parallel with the driving motor 210, and the support shaft 310 also extends through the swinging rod 223. Moreover, the fixing seat 320 is also installed on the mounting frame 100, the fixing seat 320 is fixedly sleeved on the support shaft 310, the fixing seat 320 and the swinging rod 223 are arranged oppositely, the fixing ring 702 of the bearing 70 to be tested is arranged on the fixing seat 320, and the swinging ring 701 is arranged in the swinging rod 223. When the driving motor 210 drives the transmission rod 221 to drive the swinging rod 223 to swing back and forth, the swinging rod 223 can drive the swinging ring 701 to swing back and forth relative to the fixing ring 702 in the fixing seat 320 through the rolling body 703.

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

[0098] See also Figure 2 , Figure 3 , Figure 6 and Figure 7 In one embodiment, there are two fixing seats 320, which are located on both sides of the swinging rod 223, and a bearing 70 to be tested is installed in each fixing seat 320. That is, the two fixing seats 320 are fixed to the support shaft 310, and there is a fixing seat 320 above the swinging rod 223, and there is a fixing seat 320 below the swinging rod 223. The upper fixing seat 320 cooperates with the swinging rod 223 to install a bearing 70 to be tested, and the lower fixing seat 320 cooperates with the swinging rod 223 to install a bearing 70 to be tested.

[0099] Specifically, the upper and lower surfaces of the swing 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 installed in the upper fixing seat 320, the lower shaft seat (i.e., the swing ring 701) of the upper bearing 70 to be tested is installed in the swing lever 223, the lower shaft seat (i.e., the fixing ring 702) of the lower bearing 70 to be tested is installed in the lower fixing seat 320, and the upper shaft seat (i.e., the swing ring 701) of the lower bearing 70 to be tested is installed in the swing lever 223. That is, the swing lever 223 connects the shaft seats (i.e., the swing ring 701) of the two bearings 70 to be tested that are close to each other in the middle.

[0100] When the transmission rod 221 drives the swing rod 223 to swing back and forth, the swing rod 223 can drive the swing ring 701 of the upper bearing 70 to be tested and the lower bearing 70 to be tested to swing back and forth, so that one testing mechanism 300 can simultaneously perform grease lubrication tests on two bearings 70 to be tested. Moreover, the swing rod 223 drives the different shaft seats of the two bearings 70 to be tested to swing back and forth, and a comparative test can be performed to determine the micro-motion wear of the two bearings 70 to be tested after the test.

[0101] When the present application uses two test mechanisms 300 to perform the grease lubrication test, each test mechanism 300 can simultaneously install two bearings 70 to be tested, and two test mechanisms 300 can simultaneously perform the grease lubrication test on four bearings 70 to be tested, thereby increasing the number of test samples. Moreover, the bearings 70 to be tested in the two test mechanisms 300 can also form a control group to determine the micro-motion 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 , and 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 schematic diagram of the clamping and centering assembly 330 in the test mechanism 300 is shown as being arranged on the fixed seat 320. The clamping and centering assembly 330 reliably fixes the fixed ring 702 of the bearing 70 to be tested to the fixed seat 320, and during the test, the fixed ring 702 will not move synchronously with the swing ring 701 and the rolling body 703 to ensure the accuracy of the test results.

[0103] At the same time, the clamping and centering assembly 330 can also ensure that the fixed ring 702 and the swing ring 701 are not eccentric, so that the central axis of the swing ring 701 coincides with that of the fixed ring 702. In this way, the driving motor 210 drives the swing rod 223 through the transmission rod 221 to drive the swing ring 701 of the bearing to be tested to swing back and forth around the central axis of the fixed ring 702, thereby ensuring the accuracy of the test results and avoiding the situation where the test results are inaccurate due to eccentric wear, thereby ensuring the 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, and the mounting ring 332 is disposed on the fixed seat 320. The plurality of clamping members 331 are evenly distributed along the circumference of the mounting ring 332, and each clamping member 331 is movably disposed in the mounting ring 332 in the radial direction and can abut against the outer wall of the fixing ring 702 of the measured bearing 70. The mounting ring 332 is fixedly disposed in the mounting groove of the fixed seat 320, and the clamping members 331 are radially disposed on the mounting ring 332, and the clamping members 331 can extend into or move out of the inner side of the mounting ring 332 when moving in the radial direction.

[0105] After the fixing ring 702 is arranged on the mounting ring 332, the clamping member 331 extends radially into the mounting ring 332. At this time, the end of the clamping member 331 can abut against the outer wall of the fixing ring 702. In this way, after a plurality of clamping members 331 abut against the outer wall of the fixing ring 702, the fixing ring 702 of the bearing to be tested 70 can be fixed to the fixing seat 320, ensuring that the fixing ring 702 will not move with the swinging ring 701 during the test. Moreover, the plurality of clamping members 331 can move synchronously to abut against or disengage from the outer wall of the fixing ring 702 at the same time, so as to realize the centering of the fixing ring 702 and ensure that the bearing to be tested 70 is not eccentric.

[0106] Exemplarily, the number of the clamping members 331 is three, and the three clamping members 331 are evenly arranged along the circumference of the mounting ring 332. Optionally, the number of the clamping members 331 is two, and the phase difference between the two clamping members 331 is 180°. Of course, in other embodiments of the present application, the number of the clamping members 331 can be more, as long as the fixing ring 702 can be fixed to the fixing seat 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 abut against the outer wall of the fixing ring 702 synchronously, so that the fixing ring 702 can always be tightened in a symmetrical manner.

[0108] Optionally, the mounting ring 332 is rotatably disposed on the fixing seat 320, one end of the clamping member 331 is connected to the mounting ring 332, and the other end is radially movable on the fixing seat 320. When the mounting ring 332 rotates, it can drive each clamping member 331 to simultaneously approach or move away from the fixing ring 702 in the radial direction. When each clamping member 331 simultaneously approaches the fixing ring 702 in the radial direction, the fixing ring 702 can always be tightened in a symmetrical manner.

[0109] Of course, in other embodiments of the present application, the clamping and centering assembly 330 may also adopt a structure similar to a three-jaw chuck or other structures capable of achieving automatic centering and clamping, which will not be described in detail here. Optionally, the clamping and centering assembly 330 may also be applied to the drive mechanism 200, and the swing ring 701 is fixed to the swing rod 223 by the clamping and centering assembly 330, so that the swing ring 701 is reliably fixed in the swing rod 223. It is worth noting that the principle of the clamping and centering assembly 330 clamping the swing ring 701 is substantially 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 test mechanism 300 further includes a support member 340, which is sleeved on the support shaft 310 and supported between the fixing seat 320 and the mounting frame 100. It can be understood 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 seat 320 to the mounting frame 100. The support member 340 is disposed below the fixing seat 320 and connected to the fixing seat 320, and the support member 340 is sleeved on the outer side of the support shaft 310, and the support member 340 is also disposed on the mounting frame 100.

[0111] Optionally, the support member 340 includes a support seat, which is arranged between the fixed seat 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 seat 320 and the mounting frame 100. Optionally, the support member 340 can also adopt a structural form of a combination of a support seat and a support rod. Of course, in other embodiments of the present application, the support member 340 can also be a support frame or other structural forms that can play a supporting role.

[0112] See also Figure 1 , Figure 3 and Figure 6 In one embodiment, the test mechanism 300 further includes a test housing 350, which is disposed on the mounting frame 100 and covers the support shaft 310 and the fixing seat 320. The test housing 350 can play a protective role. The test housing 350 covers the outer side of the support shaft 310, the fixing seat 320 and the support member 340, which can prevent other components from interfering with the movement of the swing ring 701, and can also prevent dust and other debris from entering, 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 disposed on the mounting frame 100. The test cover 351 is covered on the test base 352 to enclose a test space 353. The fixed seat 320, the swing rod 223 and the bearing 70 to be tested are located in the test space 353. The fixed seat 320 and the support rod are located in the test space 353, and the swing rod 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-cloth indentation and micro-abrasion bearing tester 10 further includes a temperature control mechanism 500, which is used to control the temperature of the bearing 70 to be tested. It is understandable that the swing of the bearing 70 to be tested during the test will generate a certain amount of heat, which will cause the swing ring 701 and the fixed ring 702 to expand and contract due to heat and cold, and deform, affecting the accuracy of the test results. The present application adds a temperature control mechanism 500 to cool the fixed seat 320 to reduce the temperature of the bearing 70 to be tested, thereby ensuring the accuracy of the test results of the bearing 70 to be tested.

[0115] In 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 seat 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 seat 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 353 and be arranged on the fixed seat 320. The temperature control cabinet 510 can control the heat exchange component 520 to exchange heat with the fixed seat 320, so as to control the temperature of the bearing 70 to be tested.

[0116] 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 fixed seat 320 through the constant temperature fluid, and then exchanges heat with the bearing 70 to be tested. The heat exchange component 520 can perform constant temperature control on the bearing 70 to be tested by heat conduction and heat radiation. Moreover, each fixed seat 320 corresponds to a heat exchange component 520, that is, each bearing 70 to be tested corresponds to a heat exchange component 520. The heat exchange component 520 can control the temperature of the corresponding fixed seat 320 and the bearing 70 to be tested, so that each bearing 70 to be tested can be independently temperature controlled, which greatly improves the temperature control accuracy and flexibility, thereby ensuring the accuracy of the test results.

[0117] Optionally, the temperature control cabinet 510 is a high and low temperature integrated machine, which can realize 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 arranged 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 arranged on the fixed seat 320. The circulation pipeline 521 connects the temperature control cabinet 510 and the heat exchange coil 522. The control valve 523 is arranged on the circulation pipeline 521. The heat exchange coil 522 is arranged on the fixed seat 320, and can perform heat exchange and temperature control on the fixed seat 320 and the bearing 70 to be tested by heat radiation and heat conduction, so that the bearing 70 to be tested maintains a constant temperature state.

[0119] The circulation pipeline 521 is connected to the temperature control cabinet 510, and the heat exchange coil 522 is connected to the circulation pipeline 521. The control cabinet delivers the constant temperature fluid to the circulation pipeline 521, and the constant temperature fluid is delivered to the heat exchange coil 522 through the circulation pipeline 521. After the heat exchange of the constant temperature fluid is completed, it enters the temperature control cabinet 510 through the circulation pipeline 521 for temperature control to perform the next cycle of heat exchange. The control valve 523 is set in the circulation pipeline 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, which is disposed on the fixing seat 320. The temperature sensor can detect the temperature of the fixing seat 320 in real time and feed it back to the temperature control cabinet 510. The temperature control cabinet 510 controls the temperature of the output constant temperature fluid according to the temperature feedback from the temperature sensor to ensure the temperature control accuracy of the bearing 70 to be tested. After using the temperature sensor, the temperature control accuracy is about 0.1°C.

[0122] This application uses a temperature control cabinet 510 as the main setting of temperature control. The temperature control cabinet 510 can realize the circulation 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 the test at -20°C, rapid cooling and constant temperature can be 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, which is connected to the support shaft 310 to load the support shaft 310. The loading member is located below the mounting frame 100, abuts against 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 is tested under 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 disposed on the top of the support shaft 310, and the torque sensor 430 is disposed 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 sleeved on the support shaft 310 and is located below the mounting frame 100, and the loading wrench 420 is disposed on the top of the support shaft 310. When the loading wrench 420 is operated, the loading wrench 420 can drive the support shaft 310 to rotate, and then the support shaft 310 can drive the disc spring 410 to move, so as to load the disc spring 410. The elastic force generated by the disc spring 410 after loading can pull down the support shaft 310, and then the support shaft 310 can drive the fixing seat 320 and the bearing 70 to move downward, so as to load the bearing 70 to be tested.

[0126] When the disc spring 410 is used for loading, the volume of the loading mechanism 400 and the weight of the entire grease-lubricated pseudo-cloth indentation and micro-abrasion bearing tester 10 can be greatly reduced, making the entire structure more compact and lightweight, and the operation is also simpler. As the test proceeds, the wear of the contact area of ​​the disc spring 410 may cause load fluctuations. For this reason, the present application sets a torque sensor 430, which monitors the load changes in real time. If the load changes exceed the critical value, the loading wrench 420 can be used for fine-tuning 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 disc spring 410 is protected by the loading housing 450. 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 such as a hydraulic cylinder, a cylinder or a weight that can achieve loading.

[0128] The grease lubricated pseudo-cloth indentation and micro-abrasion bearing tester 10 of the present application adopts 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, so as to drive the swing ring 701 of the bearing 70 to be tested to swing back and forth relative to the fixed ring 702, so as to realize the grease lubrication performance test of the bearing 70 to be tested. The parallel transmission assembly 220 adopts a parallel transmission method to connect the bearing 70 to be tested in the test mechanism 300, which 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, simplify the structural complexity and control difficulty of the drive mechanism 200, improve the efficiency of the drive motor 210, and then improve the test accuracy and repeatability, which is conducive to realizing high-frequency reciprocating control of the bearing 70 to be tested, thereby ensuring the accuracy of the test results.

[0129] The grease lubricated pseudo-cloth indentation and micro-motion wear bearing tester 10 can evaluate the micro-motion performance of the grease of the bearing 70 to be tested, and can better simulate the actual service conditions of the bearing 70 to be tested, and realize the grease anti-micro-motion performance test under high and low temperature, heavy load, and small angle reciprocating rolling conditions, and the key parameters provide measurement support, and the test results have high repeatability. In addition, the drive mechanism 200 realizes high-frequency reciprocating swing through a parallelogram structure to ensure the stability and accuracy of the test.

[0130] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described 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 only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A grease lubricated pseudo-cloth indentation and fretting bearing testing machine, characterized in that: include: Install the rack; The driving mechanism comprises a driving motor and a parallel transmission assembly, wherein the driving motor is arranged on the mounting frame, and the parallel transmission assembly connects the output end of the driving motor and the swing ring of the bearing to be tested in parallel; A testing mechanism, disposed on the mounting frame and used for mounting a fixing ring of the bearing to be tested; and A loading mechanism, disposed 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.

2. The grease lubricated pseudo-cloth indentation and fretting bearing testing machine according to claim 1 is characterized in that: 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 fixing 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 driving 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.

3. The grease lubricated pseudo-cloth indentation and fretting bearing testing machine according to claim 2 is characterized in that: The swing lever comprises a fixed body and two connecting parts, 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.

4. The grease lubricated pseudo-cloth indentation and fretting bearing testing machine according to claim 2 is characterized in that: The number of the test mechanisms is two and they 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 member includes a plurality of connecting rods, and the plurality of connecting rods are connected in series to form the transmission rod member.

5. The grease lubricated pseudo-cloth indentation and fretting bearing testing machine according to any one of claims 2 to 4, characterized in that: The testing mechanism includes a supporting shaft and a fixing seat, wherein the supporting shaft is arranged on the mounting frame and extends through the swinging rod, the fixing seat is fixed to the supporting shaft and is located on the side of the swinging rod, the fixing ring is installed in the fixing seat, and the swinging ring is installed in the swinging rod.

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

7. The grease lubricated pseudo-cloth indentation and fretting wear bearing testing machine according to claim 5, 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 supporting member, wherein the supporting member is sleeved on the supporting 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 supporting shaft and the fixing seat, the testing shell includes a testing base and a testing cover, the testing base is arranged on the mounting frame, the testing cover is covered on the testing base to enclose a testing space, and the fixing seat, the swing rod and the bearing to be tested are located in the testing space.

8. The grease lubricated pseudo-cloth indentation and fretting bearing testing machine according to claim 5, characterized in that: The grease lubricated pseudo-cloth indentation and micro-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 fixing seat, and 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 fixing seat; 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.

9. The grease lubricated pseudo-cloth indentation and fretting wear bearing testing machine according to claim 5, characterized in that: The loading mechanism includes a loading member, and the loading member is 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 so that the loading member is loaded, 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.

10. The grease lubricated pseudo-cloth indentation and fretting wear bearing testing machine according to any one of claims 1 to 4, 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 together with the parallel transmission assembly, the protective cover covers the parallel transmission assembly and the testing mechanism, 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 comprises 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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