Reciprocating friction-wear testing machine

Abstract

A reciprocating linear driving mechanism and a heating base of the reciprocating friction-wear testing machine are relatively fixed on a rack, a sample testing groove is formed in the heating base, and a pressure loading mechanism is arranged above the sample testing groove. The test clamp is arranged between the sample test groove and the pressure loading mechanism and is in linkage connection with the reciprocating linear driving mechanism, and the driving motor is arranged on the rack and is connected with the reciprocating linear driving mechanism. The reciprocating friction-wear testing machine is used for testing under the material extreme pressure condition and the oil product extreme pressure condition, and has the advantages of adjustable testing temperature, adjustable testing loading pressure, adjustable testing reciprocating stroke and adjustable testing reciprocating frequency. The equipment is attractive in overall structural design, convenient to operate, high in automation degree, good in equipment operation stability and high in test precision, the actual working condition state of a material is simulated, the experiment accuracy is improved, and the experiment efficiency and durability can be effectively improved through a reciprocating linear driving mechanism of the testing machine.

Description

Technical Field

[0001] This application relates to the field of testing equipment technology, specifically to a reciprocating friction and wear testing machine. Background Technology

[0002] A friction and wear testing machine, also known as a friction tester or wear tester, is used to rub a sample's wear layer against friction paper at a specified speed under the action of a loaded friction body. The wear resistance of the wear layer (or coating) is determined by measuring the decrease in density (or the decrease in coating thickness) before and after friction. Friction and wear testing machines are also used to evaluate the lubricity, friction reduction, and wear resistance of target objects such as lubricating oils, coatings, and substrate materials. They are essential basic experimental tools for tribology researchers. Existing friction and wear testing machines use two types of relative motion for the friction pairs: reciprocating and rotary. Among them, reciprocating friction and wear testing machines are used by most tribology researchers due to their good adaptability.

[0003] Common reciprocating friction and wear testing machines primarily achieve reciprocating motion through ball screws, electromagnetic oscillations, and crank-slider mechanisms. While these drive methods meet the testing requirements of friction tests to a certain extent, each has its own drawbacks. The ball screw method, although capable of varying the stroke of a large reciprocating motion, suffers from a low reciprocating frequency due to the commutation delay of the drive motor. This increases the testing time for long-stroke friction tests, reducing efficiency. The electromagnetic oscillation method can achieve high-frequency reciprocating motion, but the amplitude of the oscillator needs to be maintained at a certain value to ensure frequency stability, thus limiting the ability to arbitrarily change the reciprocating stroke. This is disadvantageous for friction experiments requiring variable stroke studies. The crank-slider method can change both the stroke and reciprocating frequency, but the slider exerts a lateral cyclic inertial force on the motor shaft via the connecting rod during commutation, affecting the stability of the drive motor and consequently the overall testing accuracy of the machine. Patent CN 109781570 A discloses a high-frequency reciprocating friction and wear testing machine, including a base for fixing machine accessories, a lower sample clamp for fixing a lower sample, a reciprocating conversion mechanism above the lower sample clamp, and an upper sample clamp for fixing an upper sample, the upper sample clamp being mounted on the reciprocating conversion mechanism; a lifting mechanism drives the lower sample clamp to move vertically, causing the lower sample to abut or separate from the upper sample; the reciprocating conversion mechanism drives the upper sample clamp to move horizontally reciprocally; a three-dimensional force sensor is mounted below the lower sample clamp. This testing machine can improve experimental efficiency and ensure experimental accuracy. While its reciprocating conversion mechanism effectively improves experimental efficiency, the high installation density between mechanisms is not conducive to equipment assembly, makes sample installation inconvenient, and increases the difficulty of maintenance and repair. Summary of the Invention

[0004] In view of the above problems, this application provides a reciprocating friction and wear testing machine that can be used for testing materials under extreme pressure conditions and oil under extreme pressure conditions. It has the advantages of adjustable test temperature and adjustable test loading pressure, making testing convenient and providing accurate data.

[0005] This application provides a reciprocating friction and wear testing machine, including: a frame, a reciprocating linear drive mechanism, a heating base, a sample test chamber, a pressure loading mechanism, a test fixture, and a drive motor. The reciprocating linear drive mechanism and the heating base are fixed relative to each other on the frame. The sample test chamber is disposed on the heating base. The pressure loading mechanism is disposed above the sample test chamber. The test fixture is disposed between the sample test chamber and the pressure loading mechanism and is linked to the reciprocating linear drive mechanism. The drive motor is disposed on the frame and connected to the reciprocating linear drive mechanism.

[0006] In some embodiments, the heating base is provided with heating rods and a first thermocouple. The heating rods are arranged in the heating base below the sample test cell. The first thermocouple is provided in the heating base for detecting the temperature of the heating base. The sample test cell is provided with a second thermocouple for detecting the temperature inside the sample test cell.

[0007] In some implementations, the pressure loading mechanism includes a loading bracket, a loading motor, a loading turntable, a loading rope, a loading lever, a hinge support, a loading force sensor, a loading linkage rod, and a load applying block. The loading bracket is mounted on a frame, the loading motor is fixed to the loading bracket, the loading turntable is connected to the loading motor shaft, the hinge support is located below the frame between the loading bracket and the heating base, the loading lever is hinged to the hinge support at its middle, one end of the loading lever is connected to the loading turntable via the loading rope, and the other end of the loading lever is connected to the loading force sensor. The loading linkage rod is vertically arranged, and its lower end is hinged to the loading force sensor via a force transmission rod. Its upper end is connected to the load applying block, which is positioned above the test fixture and applies downward pressure to the test fixture.

[0008] In some implementations, load guide seats are provided on opposite sides of the loading linkage rod. Each load guide seat includes a mounting base, a linear guide rail, a slider, a fixing plate, a ball-head plunger, and a limiting block. The mounting base is fixed to the frame on the opposite outer side of the loading linkage rod. The linear guide rail is vertically fixed to the mounting base on the side away from the loading linkage rod. The slider is slidably connected to the linear guide rail. The fixing plate is fixedly connected to the slider. The fixing plate has a fixing groove on the loading linkage rod side. Fixing holes are provided on both sides of the fixing groove. The ball-head plunger is located in the fixing hole. The limiting block is fixedly connected to the loading linkage rod and is located between the two ball-head plungers in the fixing groove and at the upper end of the mounting base.

[0009] In some implementations, the lower end of the loading linkage rod is hinged to a loading directional connecting rod, which is perpendicular to the loading lever. The other end of the loading directional connecting rod is hinged to a loading directional seat, which is fixedly connected to the frame. The upper end of the test fixture is provided with a roller that is tumblingly connected to the load application block. A return spring is provided on the loading lever between the loading rope and the loading hinge support, and the other end of the return spring is connected to the frame.

[0010] In some implementations, the reciprocating linear drive mechanism includes a bearing housing, a guide sleeve, and a reciprocating linear assembly. The bearing housing and guide sleeve are mounted on a frame and connected to the reciprocating linear assembly. The reciprocating linear assembly includes an eccentric shaft, a linear motion reciprocating frame, a cross-motion slider, and an eccentric wheel. The eccentric shaft is mounted on the bearing housing. The two vertical inner sides of the linear motion reciprocating frame have grooves. The cross-motion slider is connected to the grooves in the linear motion reciprocating frame. The cross-motion slider has a mounting hole at its center, and the eccentric wheel is located in the mounting hole. One end of the eccentric shaft is connected to the shaft hole of the eccentric wheel, and the other end is connected to a drive motor. The linear motion reciprocating frame has a linear motion shaft perpendicular to the groove on its outer side. Both ends of the linear motion shaft pass through the guide sleeve and are connected to a test fixture.

[0011] In some implementations, the eccentric shaft and eccentric wheel are provided with spline connections.

[0012] In some implementations, the reciprocating linear drive mechanism is further provided with a housing, the reciprocating linear assembly is disposed in the housing, the guide sleeve is fixed on the opposite side of the housing, the bearing seat is sealed to the housing, and an observation window is provided on one side of the housing.

[0013] In some implementations, the eccentric wheel is provided with a balance wheel, which is symmetrically located on one side of the axial direction of the eccentric wheel, and the housing is filled with lubricating oil.

[0014] In some embodiments, the heating base is provided with elastic support feet, and the heating base is connected to the frame through the elastic support feet. The offset direction of the elastic support feet is the same as the movement direction of the reciprocating linear drive mechanism. A pressure sensor is provided on the side of the heating base away from the reciprocating linear drive mechanism. The pressure sensor is provided with a fixing frame and connected to the frame. A pressure transmission rod is provided between the pressure sensor and the heating base or the sample test tank.

[0015] In some implementations, the reciprocating linear drive mechanism, pressure loading mechanism, and drive motor are connected to a test computer, and the heating rod, first thermocouple, second thermocouple, loading motor, loading force sensor, and pressure sensor are connected to the test computer to collect data.

[0016] The beneficial effects of this application are as follows: The reciprocating friction and wear testing machine of the present invention is used for testing materials under extreme pressure conditions and oil under extreme pressure conditions, and has a test temperature. A drive motor drives a reciprocating linear motion mechanism to drive the test fixture to achieve linear reciprocating motion. The frequency of the reciprocating motion is infinitely adjustable, and the stroke has multiple adjustable levels. The test specimen is installed on the test fixture, and the test sample is fixed in the test slot. The test specimen is driven by the linear motion mechanism to reciprocate linearly within the sample test slot and reciprocates relative to the test sample in the sample test slot. A pressure loading mechanism is located above the test fixture, which applies a set pressure to the test fixture and transmits the pressure to the test specimen. The sample test slot is installed on a heating base with elastic support legs. A heating rod and a first thermocouple are installed on the heating base, and a second thermocouple is installed on the sample test slot. The test temperature can be set and selected by a test computer. When the test sample or oil fails, a precision pressure sensor immediately senses the slight change in force and transmits it to the test computer. An internal algorithm determines that the test sample has failed and displays the test data on the display screen. This equipment features adjustable test loading pressure, adjustable test reciprocating stroke, and adjustable test reciprocating frequency. Test data is converted into visual data by advanced internal algorithms and displayed on the screen of the test computer. The equipment has an aesthetically pleasing overall design, is easy to operate, highly automated, has good operational stability, and high test accuracy. It simulates the actual working conditions of materials, improving experimental accuracy. Furthermore, the reciprocating linear drive mechanism of this testing machine effectively improves experimental efficiency and durability.

[0017] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0018] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiments below. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0019] Figure 1 This is a schematic diagram of the overall state of a reciprocating friction and wear testing machine according to some embodiments of this application;

[0020] Figure 2 This is a perspective view of a reciprocating friction and wear testing machine according to some embodiments of this application;

[0021] Figure 3 for Figure 2Enlarged diagram of A in the middle;

[0022] Figure 4 This is a top view of a reciprocating friction and wear testing machine according to some embodiments of this application;

[0023] Figure 5 for Figure 4 Enlarged diagram of B in the middle;

[0024] Figure 6 This is an exploded view of a reciprocating linear drive mechanism according to some embodiments of this application;

[0025] Figure 7 This is a bottom view of a reciprocating friction and wear testing machine according to some embodiments of this application;

[0026] Figure 8 This is a side view of a reciprocating friction and wear testing machine according to some embodiments of this application;

[0027] Figure 9 This is a schematic diagram of the structure of the eccentric shaft in some embodiments of this application;

[0028] Figure 10 This is a schematic diagram of the structure of the eccentric wheel in some embodiments of this application;

[0029] Figure 11 This is an exploded view of a load guide seat according to some embodiments of this application;

[0030] Figure 12 This is a schematic diagram of the unloaded structure of a reciprocating friction and wear testing machine according to some embodiments of this application;

[0031] Figure 13 for Figure 11 An enlarged diagram of C in the diagram.

[0032] The reference numerals in the detailed embodiments are as follows:

[0033] Frame 1; Reciprocating linear drive mechanism 2; Bearing seat 21; Guide sleeve 22; Reciprocating linear assembly 23; Eccentric shaft 231; Linear motion reciprocating frame 232; Cross motion slider 233; Eccentric wheel 234; Slide groove 235; Mounting hole 236; Linear motion shaft 237; Spline 238; Balance wheel 239; Housing 24; Observation window 241; Heating base 3; Heating rod 31; First thermocouple 32; Elastic support foot 33; Pressure sensor 34; Fixing bracket 35; Pressure transmission rod 36; Sample test slot 4; Second thermocouple 41; Pressure loading mechanism 5; Loading 51. Bracket; 52. Loading motor; 53. Loading turntable; 54. Loading rope; 55. Loading lever; 551. Return spring; 56. Hinge support; 57. Loading force sensor; 571. Force transmission rod; 58. Loading linkage rod; 581. Loading directional connecting rod; 582. Load directional seat; 59. Load application block; 510. Load guide seat; 511. Mounting seat; 512. Linear guide rail; 513. Slider; 514. Fixing clamp; 5141. Fixing groove; 5142. Fixing hole; 515. Ball head plug; 516. Limiting block; 6. Test fixture; 61. Roller; 7. Drive motor; 8. Test computer. Detailed Implementation

[0034] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0036] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0037] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0038] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0039] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple groups" refers to two or more (including two groups), and "multiple pieces" refers to two or more (including two pieces).

[0040] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0041] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" 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. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0042] Reference Figure 1-13 As shown. A reciprocating friction and wear testing machine includes: a frame 1, a reciprocating linear drive mechanism 2, a heating base 3, a sample test groove 4, a pressure loading mechanism 5, a test fixture 6, and a drive motor 7. The reciprocating linear drive mechanism 2 and the heating base 3 are fixedly mounted on the frame 1. The sample test groove 4 is disposed on the heating base 3. The pressure loading mechanism 5 is disposed above the sample test groove 4. The test fixture 6 is disposed between the sample test groove 4 and the pressure loading mechanism 5 and is linked to the reciprocating linear drive mechanism 2. The drive motor 7 is disposed on the frame 1 and connected to the reciprocating linear drive mechanism 2.

[0043] This reciprocating friction and wear testing machine is used for testing materials under extreme pressure conditions and oil under extreme pressure conditions. It has a test temperature. The test fixture 6 is driven by a reciprocating linear motion mechanism driven by a drive motor 7 to achieve linear reciprocating motion. The frequency of the reciprocating motion is infinitely adjustable, and the stroke has multiple adjustable levels. The test specimen is installed on the test fixture 6 and the test sample is fixed in the test slot. The test specimen is driven by the linear motion mechanism to reciprocate linearly in the sample test slot 4 and reciprocate linearly relative to the test sample in the sample test slot 4. A pressure loading mechanism 5 is located above the test fixture 6. The pressure loading mechanism 5 applies a set pressure to the test fixture 6 and transmits the pressure to the test specimen.

[0044] Mount the test specimen on the test fixture 6; secure the test sample to the sample test slot 4 with screws; pour the test oil into the sample test slot 4, ensuring the oil level is 2mm to 5mm above the test sample; raise the pressure loading mechanism 5 above the test fixture 6 and engage it with the load guide seat 510. The linear guide rail 512 within the load guide seat 510 will constrain the pressure loading mechanism 5, allowing it to move only up and down. Turn on the machine power and the test computer 8, and turn the loading and reciprocating switch to the closed position. Input the test conditions such as temperature, frequency, and load into the test computer 8 and start the test on the computer. The machine will automatically complete the test and automatically compile the test data. This completes one test task.

[0045] According to some embodiments of this application, the heating base 3 is provided with a heating rod 31 and a first thermocouple 32. The heating rod 31 is arranged in the heating base 3 below the sample test slot 4. The first thermocouple 32 is provided in the heating base 3 for detecting the temperature of the heating base 3. The sample test slot 4 is provided with a second thermocouple 41 for detecting the temperature in the sample test slot 4.

[0046] Temperature control is achieved through dual thermocouples, enabling more precise control of the temperature value within the sample test tank 4.

[0047] According to some embodiments of this application, the pressure loading mechanism 5 includes a loading bracket 51, a loading motor 52, a loading turntable 53, a loading rope 54, a loading lever 55, a hinge support 56, a loading force sensor 57, a loading linkage rod 58, and a load applying block 59. The loading bracket 51 is mounted on the frame 1, the loading motor 52 is fixed to the loading bracket 51, the loading turntable 53 is connected to the rotating shaft of the loading motor 52, the hinge support 56 is located below the frame 1 between the loading bracket 51 and the heating base 3, the loading lever 55 is hinged to the hinge support 56 at its middle, one end of the loading lever 55 is connected to the loading turntable 53 via the loading rope 54, and the other end of the loading lever 55 is connected to the loading force sensor 57. The loading linkage rod 58 is vertically mounted through the frame 1, and its lower end is hinged to the loading force sensor 57 via a force transmission rod 571. Its upper end is connected to the load applying block 59, which is located above the test fixture 6 and applies downward pressure to the test fixture 6.

[0048] The loading motor 52 drives the loading turntable 53 to rotate, providing tension to the loading rope 54, thereby applying torque to one end of the loading lever 55. The torque is transmitted to the test fixture 6 through the loading force sensor 57, the loading linkage rod 58, and the load force block 59. The test fixture 6 and the sample in the sample test slot 4 form a relative pressure.

[0049] According to some embodiments of this application, load guide seats 510 are respectively provided on opposite sides of the loading linkage rod 58. Each load guide seat 510 includes a mounting base 511, a linear guide rail 512, a slider 513, a fixing plate 514, a ball-head plunger 515, and a limiting block 516. The mounting base 511 is fixed to the frame 1 on the opposite outer side of the loading linkage rod 58. The linear guide rail 512 is vertically fixed to the side of the mounting base 511 away from the loading linkage rod 58. The slider 513 is connected to the linear guide rail 514. The linear guide rail 512 is slidably connected, and the fixed clamping plate 514 is fixedly connected to the slider 513. The fixed clamping plate 514 has a fixed groove 5141 on the side of the loading linkage rod 58, and fixed holes 5142 on both sides of the fixed groove 5141. The ball-head plug 515 is disposed within the fixed holes 5142. The limiting block 516 is fixedly connected to the loading linkage rod 58 and is located between the two ball-head plugs 515 in the fixed groove 5141, and is positioned on the upper end of the mounting base 511. The limiting block 516 is fixedly connected to the fixed clamping plate 514 via the ball-head plugs 515.

[0050] During the friction and wear test, the loading linkage rod 58, by tightening the ball head plug 515, fixes the limiting block 516 onto the fixed clamping plate 514. The loading linkage rod 58, the slider 513, and the fixed clamping plate 514 are limited to vertical movement under the guidance of the linear guide rail 512. The load guide seat 510 can limit the loading linkage rod 58 to vertical movement and apply downward pressure. Furthermore, the loading linkage rod 58 can rotate to avoid obstacles, facilitating the installation and removal of the sample in the sample test slot 4.

[0051] When it is necessary to replace the sample in the sample test slot 4, unscrew the ball head plug 515, lift the loading linkage rod 58 upward, and the limit block 516 can be disengaged from the fixed clamp 514. The loading linkage rod 58 rotates around the hinge point of the force transmission rod 571 and the loading directional connecting rod 581. The upper end of the loading linkage rod 58 and the load application block 59 are offset to one side of the sample test slot 4 to avoid the sample test slot 4, so as to facilitate the disassembly and assembly of the sample in the sample test slot 4.

[0052] According to some embodiments of this application, the lower end of the loading linkage rod 58 is hinged to a loading directional connecting rod 581, the loading directional connecting rod 581 is perpendicular to the loading lever 55, the other end of the loading directional connecting rod 581 is hinged to a loading directional seat 582, the loading directional seat 582 is fixedly connected to the frame 1; the upper end of the test fixture 6 is provided with a roller 61 that is rollingly connected to the load application block 59; a return spring 551 is provided on the loading lever 55 between the loading rope 54 and the loading hinge support 56, the other end of the return spring 551 is connected to the frame 1.

[0053] By setting a loading directional connecting rod 581, the loading linkage rod 58 can be made to move more stably up and down, avoiding swaying or deviation, and the pressure value is more stable and accurate.

[0054] According to some embodiments of this application, the reciprocating linear drive mechanism 2 is provided with a bearing seat 21, a guide sleeve 22, and a reciprocating linear assembly 23. The bearing seat 21 and the guide sleeve 22 are mounted on the frame 1 and connected to the reciprocating linear assembly 23. The reciprocating linear assembly 23 is provided with an eccentric shaft 231, a linear motion reciprocating frame 232, a cross motion slider 233, and an eccentric wheel 234. The eccentric shaft 231 is mounted on the bearing seat 21. The two vertical inner sides of the linear motion reciprocating frame 232 are provided with sliding grooves 235. The cross motion slider 233... The cross-shaped sliding block 233 is connected to the slide groove 235 in the linear motion reciprocating frame 232. The center of the cross-shaped sliding block 233 is provided with a mounting hole 236, and the eccentric wheel 234 is provided in the mounting hole 236. One end of the eccentric shaft 231 is connected to the shaft hole of the eccentric wheel 234, and the other end is connected to the drive motor 7. The linear motion reciprocating frame 232 is provided with a linear motion shaft 237 perpendicular to the slide groove 235 on the outer side. The two ends of the linear motion shaft 237 are respectively connected through the guide sleeve 22, and one end of the linear motion shaft 237 is connected to the test fixture 6.

[0055] The reciprocating linear drive mechanism 2 uses a double eccentric structure design to make the stroke of the reciprocating motion adjustable and the structure more stable in operation.

[0056] According to some embodiments of this application, the eccentric shaft 231 and the eccentric wheel 234 are connected by a spline 238.

[0057] The inherent eccentricity of the eccentric shaft 231 with spline 238 is T1; the inherent eccentricity of the eccentric sleeve with spline 238 is T2. When the eccentric sleeve and eccentric shaft 231 are connected via spline 238, rotating at different angles will result in a cumulative eccentricity between (T2-T1) and (T2+T1) in multiple adjustable ranges. The number of ranges is half the number of teeth on spline 238 plus one. By rotating the eccentric sleeve and eccentric shaft 231 to different positions of spline 238, the cumulative eccentricity can be adjusted in multiple ranges. The stroke of the reciprocating linear motion is twice the cumulative eccentricity. Therefore, the stroke can be continuously adjusted in multiple ranges.

[0058] According to some embodiments of this application, the reciprocating linear drive mechanism 2 is further provided with a housing 24, the reciprocating linear assembly 23 is disposed inside the housing 24, the guide sleeve 22 is fixed on the opposite side of the housing 24, the bearing seat 21 is sealed to the housing 24, and an observation window 241 is provided on one side of the housing 24.

[0059] The housing 24 serves to fix and protect the reciprocating linear drive mechanism 2.

[0060] According to some embodiments of this application, the eccentric wheel 234 is provided with a balance wheel 239, the balance wheel 239 is centrally symmetrically arranged on one side of the axial direction of the eccentric wheel 234, and the housing 24 is filled with lubricating oil.

[0061] By setting a balance wheel 239, the eccentric force generated by the rotation of the eccentric wheel 234 is balanced, reducing the wear of the components caused by the eccentric force; and by filling the housing 24 with lubricating oil, the reciprocating linear assembly 23 can run more stably and reduce wear.

[0062] According to some embodiments of this application, the heating base 3 is provided with an elastic support foot 33, and the heating base 3 is connected to the frame 1 through the elastic support foot 33. The offset direction of the elastic support foot 33 is the same as the movement direction of the reciprocating linear drive mechanism 2. A pressure sensor 34 is provided on the side of the heating base 3 away from the reciprocating linear drive mechanism 2. The pressure sensor 34 is provided with a fixing frame 35 and connected to the frame 1. A pressure transmission rod 36 is provided between the pressure sensor 34 and the heating base 3 or the sample test tank 4 for mutual connection.

[0063] According to some embodiments of this application, the reciprocating linear drive mechanism 2, the pressure loading mechanism 5, and the drive motor 7 are connected to a test computer 8. The heating rod 31, the first thermocouple 32, the second thermocouple 41, the loading motor 52, the loading force sensor 57, and the pressure sensor 34 are connected to the test computer 8 to collect data.

[0064] The sample test tank 4 is mounted on the heating base 3 of the elastic support foot. A heating rod 31 and a first thermocouple 32 are installed on the heating base, and a second thermocouple 41 is installed on the sample test tank 4. The test temperature can be set and selected via the test computer 8. When the test sample or oil fails, the elastic support foot 33 shakes, and the precision pressure sensor 34 immediately senses the slight change in force and transmits it to the test computer 8. An internal algorithm determines that the test sample has failed and displays the test data on the screen. This equipment features adjustable test loading pressure, adjustable test reciprocating stroke, and adjustable test reciprocating frequency. Test data is converted into visual data by an advanced internal algorithm and displayed on the screen of the test computer 8. The equipment has an aesthetically pleasing overall design, is easy to operate, has a high degree of automation, good operational stability, and high test accuracy. It simulates the actual working conditions of the material, improving experimental accuracy. Furthermore, the reciprocating linear drive mechanism 2 of this testing machine effectively improves experimental efficiency and durability.

[0065] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A reciprocating friction and wear tester characterized by, include: The device comprises a frame, a reciprocating linear drive mechanism, a heating base, a sample test chamber, a pressure loading mechanism, a test fixture, and a drive motor. The reciprocating linear drive mechanism and the heating base are fixed relative to each other on the frame. The sample test chamber is located on the heating base. The pressure loading mechanism is located above the sample test chamber. The test fixture is located between the sample test chamber and the pressure loading mechanism and is linked to the reciprocating linear drive mechanism. The drive motor is located on the frame and connected to the reciprocating linear drive mechanism.

2. The reciprocating friction and wear testing machine as described in claim 1, characterized in that, The heating base is equipped with heating rods and a first thermocouple. The heating rods are arranged in the heating base below the sample test slot. The first thermocouple is installed in the heating base to detect the temperature of the heating base. The sample test slot is equipped with a second thermocouple to detect the temperature inside the sample test slot.

3. The reciprocating friction and wear testing machine as described in claim 1, characterized in that, The pressure loading mechanism includes a loading bracket, a loading motor, a loading turntable, a loading rope, a loading lever, a hinge support, a loading force sensor, a loading linkage rod, and a load applying block. The loading bracket is mounted on the frame, the loading motor is fixed to the loading bracket, the loading turntable is connected to the loading motor shaft, the hinge support is located below the frame between the loading bracket and the heating base, the loading lever is hinged to the hinge support in the middle, one end of the loading lever is connected to the loading turntable via the loading rope, and the other end of the loading lever is connected to the loading force sensor. The loading linkage rod is vertically arranged, and its lower end is hinged to the loading force sensor via a force transmission rod. Its upper end is connected to the load applying block, which is located above the test fixture and applies downward pressure to the test fixture.

4. The reciprocating friction and wear testing machine as described in claim 3, characterized in that, The loading linkage rod is provided with load guide seats on both sides. The load guide seats are provided with mounting seats, linear guide rails, sliders, fixing plates, ball-end plugs and limiting blocks. The mounting seats are fixed on the frame on the outer side of the loading linkage rod. The linear guide rails are vertically fixed on the mounting seats away from the loading linkage rods. The sliders are slidably connected to the linear guide rails. The fixing plates are fixedly connected to the sliders. The fixing plates are provided with fixing grooves on the loading linkage rod side. Fixing holes are provided on both sides of the fixing grooves. The ball-end plugs are located in the fixing holes. The limiting blocks are fixedly connected to the loading linkage rods. The limiting blocks are located between the two ball-end plugs in the fixing grooves and are located at the upper end of the mounting seats.

5. A reciprocating friction and wear testing machine as described in claim 3 or 4, characterized in that, The lower end of the loading linkage rod is hinged to a loading directional connecting rod, which is perpendicular to the loading lever. The other end of the loading directional connecting rod is hinged to a loading directional seat, which is fixedly connected to the frame. The upper end of the test fixture is provided with a roller that is rollingly connected to the load application block. A return spring is provided on the loading lever between the loading rope and the loading hinge support, and the other end of the return spring is connected to the frame.

6. A reciprocating friction and wear testing machine as described in claim 1, characterized in that, The reciprocating linear drive mechanism includes a bearing housing, a guide sleeve, and a reciprocating linear assembly. The bearing housing and guide sleeve are mounted on the frame and connected to the reciprocating linear assembly. The reciprocating linear assembly includes an eccentric shaft, a linear motion reciprocating frame, a cross motion slider, and an eccentric wheel. The eccentric shaft is mounted on the bearing housing. The two vertical inner sides of the linear motion reciprocating frame have sliding grooves. The cross motion slider is connected to the sliding grooves in the linear motion reciprocating frame. The cross motion slider has a mounting hole at its center, and the eccentric wheel is located in the mounting hole. One end of the eccentric shaft is connected to the shaft hole of the eccentric wheel, and the other end is connected to the drive motor. The linear motion reciprocating frame has a linear motion shaft perpendicular to the sliding groove on its outer side. Both ends of the linear motion shaft pass through the guide sleeve and are connected to a test fixture.

7. A reciprocating friction and wear testing machine as described in claim 6, characterized in that, The reciprocating linear drive mechanism also includes a housing, the reciprocating linear assembly is housed inside the housing, the guide sleeve is fixed to the opposite side of the housing, the bearing seat is sealed to the housing, and an observation window is provided on one side of the housing.

8. A reciprocating friction and wear testing machine as described in claim 6, characterized in that, The eccentric shaft and eccentric wheel are connected by splines; the eccentric wheel is equipped with a balance wheel, which is symmetrically located on one side of the axial direction of the eccentric wheel; and the housing is filled with lubricating oil.

9. A reciprocating friction and wear testing machine as described in claim 1, characterized in that, The heating base is provided with elastic support feet, and the heating base is connected to the frame through the elastic support feet. The offset direction of the elastic support feet is the same as the movement direction of the reciprocating linear drive mechanism. A pressure sensor is provided on the side of the heating base away from the reciprocating linear drive mechanism. The pressure sensor is provided with a fixing frame and connected to the frame. A pressure transmission rod is provided between the pressure sensor and the heating base or the sample test tank.

10. A reciprocating friction and wear testing machine as described in claim 1, characterized in that, The reciprocating linear drive mechanism, pressure loading mechanism, and drive motor are connected to a test computer. The heating rod, first thermocouple, second thermocouple, loading motor, loading force sensor, and pressure sensor are connected to the test computer to collect data.

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