Friction testing machine

Abstract

The utility model discloses a friction testing machine, which belongs to the technical field of pressurization equipment and comprises a reciprocating mechanism and a loading mechanism, the reciprocating mechanism comprises a first rack, a first driving mechanism, a guide sleeve, a guide rod, a sliding seat and a clamp, the guide sleeve is arranged on the first rack, the guide rod penetrates through the guide sleeve and is in sliding fit with the guide sleeve, and the loading mechanism is arranged on the first rack. The first driving mechanism is arranged on the first rack and hinged to one end of the guide rod, the sliding seat is fixed to the first rack and located at the end, away from the first driving mechanism, of the guide rod, the clamp is slidably arranged on the sliding seat, the end, away from the first driving mechanism, of the guide rod is hinged to one end of the clamp, and the clamp is used for fixing a first friction test workpiece; the loading mechanism is placed on the ground and corresponds to the clamp. The loading mechanism is used for fixing the second friction test workpiece. The device is simple in structure and convenient to operate, the device does not need to be shut down when pressure is adjusted, accurate control over a large load can be achieved, and the test accuracy is well guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of pressure equipment technology, specifically to a friction testing machine. Background Technology

[0002] Friction testing machines are specialized equipment used to simulate and measure the performance of materials under friction, wear, or lubrication conditions. Existing friction testing machines mainly use a rotating disk method for friction testing. Usually, the load cannot be changed during the test, and the load adjustment range is also small. In addition, when adjusting the load, the machine needs to be stopped, which makes operation inconvenient. Moreover, due to vibration, the pressure error may be large, resulting in inaccurate test results. Utility Model Content

[0003] The purpose of this invention is to provide a friction testing machine that has a simple structure, is easy to use, and can effectively improve the above-mentioned problems.

[0004] The embodiments of this utility model are implemented as follows:

[0005] This utility model provides a friction testing machine, including a reciprocating mechanism and a loading mechanism. The reciprocating mechanism includes a first frame, a first driving mechanism, a guide sleeve, a guide rod, a slide block, and a clamp. The guide sleeve is disposed on the first frame, and the guide rod passes through the guide sleeve and is slidably engaged. The first driving mechanism is disposed on the first frame and hinged to one end of the guide rod. The slide block is fixed on the first frame and located at the end of the guide rod away from the first driving mechanism. The clamp is slidably disposed on the slide block, and the end of the guide rod away from the first driving mechanism is hinged to one end of the clamp. The clamp is used to fix a first friction test workpiece. The loading mechanism is placed on the ground and corresponds to the clamp. The loading mechanism is used to fix a second friction test workpiece. The second friction test workpiece has a first state of abutting against the first friction test workpiece and a second state of being separated from the first friction test workpiece.

[0006] Furthermore, the first drive mechanism includes a first drive motor, a first transmission shaft, a second transmission shaft, a first bevel gear, a second bevel gear, a turntable, and a connecting rod. The turntable is rotatably supported on the first frame via a rotating shaft, and the second transmission shaft is rotatably supported on the first frame. The first bevel gear is disposed at one end of the second transmission shaft, and the second bevel gear is disposed on the rotating shaft supporting the turntable. The first bevel gear and the second bevel gear mesh. The first drive motor is disposed on the first frame. One end of the first transmission shaft is connected to the output shaft of the first drive motor via a universal joint, and the other end of the first transmission shaft is connected to the end of the second transmission shaft away from the first bevel gear via a universal joint. One end of the connecting rod is hinged to the turntable, and the other end of the connecting rod is hinged to one end of the guide rod.

[0007] Furthermore, the loading mechanism includes a second frame, a second drive mechanism, a positioning seat, a force transmission mechanism, and a specimen clamping head. The second drive mechanism is disposed at the upper end of the second frame, the positioning seat is disposed inside the second frame and located below the second drive mechanism, the positioning seat is provided with a guide hole, the force transmission mechanism passes through the guide hole and is slidably engaged, the upper end of the force transmission mechanism is connected to the second drive mechanism, the second drive mechanism is used to drive the force transmission mechanism to slide up and down, and the specimen clamping head is disposed at the lower end of the force transmission mechanism and located directly above the clamp.

[0008] Furthermore, the force transmission mechanism includes a force transmission rod, an upper flange, and a lower flange. The force transmission rod passes through the guide hole and is slidably fitted. The upper flange is disposed at the upper end of the force transmission rod and is connected to the second drive mechanism. The lower flange is disposed at the lower end of the force transmission rod, and the specimen clamping head is fixed to the lower flange.

[0009] Furthermore, a pressure sensor is provided at the connection between the upper flange and the second drive mechanism.

[0010] Furthermore, the number of force transmission rods is at least two, and the number of guide holes is the same as the number of force transmission rods and corresponds one-to-one.

[0011] Furthermore, the second drive mechanism is one of a hydraulic cylinder, a linear motor, or a linear module.

[0012] Furthermore, the second drive mechanism is a hydraulic cylinder, the upper end of the cylinder body of the hydraulic cylinder is connected to the second frame by bolts, and the lower end of the telescopic rod of the hydraulic cylinder is connected to the upper flange.

[0013] Furthermore, the specimen clamping head is a three-jaw chuck or a four-jaw chuck.

[0014] Furthermore, both the lower ends of the support legs of the first frame and the second frame are provided with adjusting feet, which are threadedly connected to the support legs of the first frame and the second frame.

[0015] The beneficial effects of this utility model are as follows:

[0016] The friction testing machine provided by this utility model has a simple structure and is easy to operate. The reciprocating mechanism can stably drive one specimen to slide back and forth, and the loading mechanism is used to control the up and down movement of another specimen. The loading mechanism can monitor the pressure applied to the specimen in real time. During the test, the pressure can also be adjusted according to the situation. When adjusting the pressure, it is not necessary to stop the machine. Moreover, it can achieve precise control of large loads and better ensure the accuracy of the test. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of the friction testing machine provided in an embodiment of the present invention;

[0019] Figure 2 This is a schematic diagram of the reciprocating mechanism;

[0020] Figure 3 This is a schematic diagram of the loading mechanism;

[0021] Figure 4 This is a schematic diagram of the positioning seat.

[0022] Figure 5 This is a schematic diagram of the force transmission mechanism.

[0023] In the diagram: 1-Reciprocating mechanism; 11-First frame; 111-Adjusting foot; 12-First drive mechanism; 121-First drive motor; 122-First transmission shaft; 123-Second transmission shaft; 124-First bevel gear; 125-Second bevel gear; 126-Turntable; 127-Connecting rod; 128-Universal joint; 13-Guide sleeve; 14-Guide rod; 15-Slide; 16-Clamp; 2-Loading mechanism; 21-Second frame; 22-Second drive mechanism; 23-Positioning seat; 231-Guide hole; 24-Specimen clamping head; 25-Force transmission mechanism; 251-Force transmission rod; 252-Upper flange; 253-Lower flange; 26-Pressure sensor. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the present utility model and are not intended to limit the present utility model; that is, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The components of the embodiments of the present utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0025] In the description of this utility model, it should be noted that the terms "upper" and "lower" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use, or the orientation or positional relationship that is commonly understood by those skilled in the art. They are only used to facilitate the description of this utility model and to simplify 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 this utility model.

[0026] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, a direct connection, or an indirect connection through an intermediate medium; or they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0027] The present invention will be further described below with reference to the accompanying drawings, but the scope of protection of the present invention is not limited to the following description.

[0028] refer to Figure 1 As shown, this utility model embodiment provides a friction testing machine, including a reciprocating mechanism 1 and a loading mechanism 2 used in cooperation with each other.

[0029] refer to Figure 2As shown, the reciprocating mechanism 1 includes a first frame 11, a first drive mechanism 12, a guide sleeve 13, a guide rod 14, a slide 15, and a clamp 16. The first frame 11 serves to support the other components. In this embodiment, the first frame 11 is a frame structure. The bottom of the first frame 11 is provided with an adjusting foot 111, which is threadedly connected to the first frame 11. The adjusting foot 111 facilitates the adjustment of the level of the first frame 11, ensuring that the first frame 11 is placed stably on the ground. A guide sleeve 13 is mounted on the first frame 11. A guide rod 14 passes through the guide sleeve 13 and is slidably engaged. The guide sleeve 13 limits the movement of the guide rod 14. When subjected to axial force, the guide rod 14 can slide back and forth within the guide sleeve 13. A slide block 15 is fixed to the first frame 11 and located at one end of the guide rod 14. A clamp 16 is slidably mounted on the slide block 15. The clamp 16 is used to fix the test workpiece. One end of the guide rod 14 is hinged to one end of the clamp 16. The reciprocating sliding of the guide rod 14 can drive the clamp 16 to also reciprocate on the slide block 15. In this embodiment, the clamp 16 is used to fix the first friction test workpiece, which is a flat plate structure and is horizontally fixed on the clamp 16.

[0030] The first drive mechanism 12 includes a first drive motor 121, a first drive shaft 122, a second drive shaft 123, a first bevel gear 124, a second bevel gear 125, a turntable 126, and a connecting rod 127. The turntable 126 is rotatably supported on the first frame 11 via a rotating shaft, and the turntable 126 and the rotating shaft supporting it can rotate synchronously. The second drive shaft 123 is rotatably supported on the first frame 11, and the second drive shaft 123 is perpendicular to the rotating shaft of the turntable 126. The first bevel gear 124 is disposed at one end of the second drive shaft 123 and can rotate synchronously. The second bevel gear 125... Wheel 125 is mounted on the rotating shaft of the supporting turntable 126 and can rotate synchronously. The first bevel gear 124 meshes with the second bevel gear 125. The first drive motor 121 is mounted on the first frame 11. One end of the first transmission shaft 122 is connected to the output shaft of the first drive motor 121 through a universal joint 128. The other end of the first transmission shaft 122 is also connected to the end of the second transmission shaft 123 away from the first bevel gear 124 through a universal joint 128. One end of the connecting rod 127 is hinged to the turntable 126, and the other end of the connecting rod 127 is hinged to one end of the guide rod 14. In this way, the first drive motor 121 can drive the second drive shaft 123 to rotate through the first drive shaft 122. The first bevel gear 124 rotates synchronously with the second drive shaft 123. The first bevel gear 124 drives the second bevel gear 125 to rotate. The second bevel gear 125 drives the turntable 126 to rotate. The rotation of the turntable 126 can drive the guide rod 14 to reciprocate through the connecting rod 127, thereby driving the clamp 16 to reciprocate.

[0031] refer to Figure 3As shown, the loading mechanism 2 includes a second frame 21, a second drive mechanism 22, a positioning seat 23, a force transmission mechanism 25, and a specimen clamping head 24.

[0032] The second frame 21 serves to support other components. In this embodiment, the second frame 21 is a frame structure. The lower end of the second frame 21 is provided with adjusting feet 111, which are threadedly connected to the second frame 21. The adjusting feet 111 facilitate adjustment of the levelness of the second frame 21, ensuring that the second frame 21 is placed stably on the ground. The second frame 21 is placed across the first frame 11 and corresponds to the clamps 16 on the first frame 11.

[0033] The positioning seat 23 is housed within the second frame 21 and is connected to the second frame 21 by bolts, facilitating assembly and disassembly. A guide hole 231 is provided on the positioning seat 23 near its center (see reference). Figure 4 As shown in the figure, the axis of the guide hole 231 is perpendicular to the ground, and the number of guide holes 231 is at least two. In this embodiment, there are four guide holes 231, and the four guide holes 231 are evenly distributed on the same circumference.

[0034] refer to Figure 5 As shown, the force transmission mechanism 25 includes a force transmission rod 251, an upper flange 252, and a lower flange 253. The force transmission rod 251 passes through the guide hole 231, and the force transmission rod 251 is slidably engaged with the guide hole 231. The number of force transmission rods 251 is the same as the number of guide holes 231 and they correspond one-to-one.

[0035] The upper flange 252 is located at the upper end of the force transmission rod 251. The upper flange 252 is detachably connected to the force transmission rod 251. The upper ends of all four force transmission rods 251 are connected to the upper flange 252. For example, the upper end of the force transmission rod 251 can be machined into an external thread structure. A through hole is opened on the upper flange 252, and the upper end of the force transmission rod 251 passes through the through hole and is then locked with a nut. Of course, the upper end of the force transmission rod 251 can also be connected to the upper flange 252 through a fixing joint.

[0036] The lower flange 253 is located at the lower end of the force transmission rod 251. The lower flange 253 is detachably connected to the force transmission rod 251. The lower ends of all four force transmission rods 251 are connected to the lower flange 253. For example, the lower end of the force transmission rod 251 can be machined into an external thread structure. A through hole is opened on the lower flange 253, and the lower end of the force transmission rod 251 passes through the through hole and is then locked with a nut. Of course, the lower end of the force transmission rod 251 can also be connected to the lower flange 253 through a fixing joint.

[0037] The second drive mechanism 22 is located at the upper end of the second frame 21 and above the force transmission mechanism 25. The second drive mechanism 22 is connected to the upper flange 252 and is used to drive the force transmission mechanism 25 to move up and down. In this embodiment, the second drive mechanism 22 is a hydraulic cylinder. Hydraulic cylinders have high control precision and good stability. The upper end of the cylinder body is connected to the second frame 21 by bolts. The telescopic rod of the hydraulic cylinder faces downward, and the lower end of the telescopic rod is connected to the upper flange 252. The hydraulic cylinder needs to be connected to a hydraulic system. The hydraulic system is used to control the extension and retraction of the telescopic rod of the hydraulic cylinder. The hydraulic system adopts existing technology and is not shown in the figure.

[0038] Of course, the second drive mechanism 22 can also be a linear motor. In this case, the lower end of the linear motor's drive shaft is rotatably connected to the upper flange 252. When the linear motor's drive shaft moves up and down, it can drive the force transmission rod 251 to slide up and down. The second drive mechanism 22 can also be a linear module. The linear module adopts existing technology. In this case, the linear module is set vertically, and the upper flange 252 is connected to the slide block 15 on the linear module. When the slide block 15 moves up and down, it can drive the force transmission rod 251 to slide up and down.

[0039] A pressure sensor 26 is installed at the connection between the upper flange 252 and the telescopic rod of the hydraulic cylinder. The pressure sensor 26 is used to monitor the downward pressure applied by the hydraulic cylinder and feed the pressure information back to the control center. If the pressure is insufficient, the hydraulic system controls the telescopic rod of the hydraulic cylinder to continue to extend downward. If the pressure is too high, the telescopic rod is controlled to retract upward.

[0040] The specimen clamping head 24 is fixed to the lower end of the lower flange 253 and located directly above the clamp 16. The specimen clamping head 24 is used to clamp the specimen to be tested. In this embodiment, the specimen clamping head is used to clamp the second friction test workpiece, which is a pin. The specimen clamping head 24 can be a three-jaw chuck or a four-jaw chuck. In this embodiment, a four-jaw chuck is selected because it provides a secure clamping grip.

[0041] The friction testing machine provided in this embodiment of the invention first fixes the first friction test workpiece on the fixture 16 and the second friction test workpiece on the four-jaw chuck. Then, a hydraulic cylinder drives the second friction test workpiece to move downward and abut against the upper surface of the first friction test workpiece. The hydraulic cylinder is controlled to apply the required pressure, and then the first drive motor 121 is started to drive the fixture 16 and drive the first friction test workpiece to slide back and forth, thereby realizing the frictional movement between the first and second friction test workpieces. The number of friction cycles and the friction time can be set as needed. After the test is completed, the first drive motor 121 is stopped, and then the hydraulic cylinder drives the four-jaw chuck to move upward, so that the first and second friction test workpieces are separated.

[0042] The above description is merely a preferred embodiment of this utility model and does not constitute any limitation on this utility model. Any person skilled in the art can make many possible variations and modifications to the technical solution of this utility model, or modify it into equivalent embodiments, without departing from the scope of the technical solution of this utility model. Therefore, any modifications, equivalent changes, and alterations made to the above embodiments based on the technology of this utility model without departing from the scope of the technical solution of this utility model shall fall within the protection scope of this technical solution.

Claims

1. A friction testing machine, characterized in that: The device includes a reciprocating mechanism and a loading mechanism. The reciprocating mechanism includes a first frame, a first drive mechanism, a guide sleeve, a guide rod, a slide block, and a clamp. The guide sleeve is disposed on the first frame, and the guide rod passes through the guide sleeve and is slidably engaged. The first drive mechanism is disposed on the first frame and hinged to one end of the guide rod. The slide block is fixed on the first frame and located at the end of the guide rod away from the first drive mechanism. The clamp is slidably disposed on the slide block, and the end of the guide rod away from the first drive mechanism is hinged to one end of the clamp. The clamp is used to fix a first friction test workpiece. The loading mechanism is placed on the ground and corresponds to the clamp. The loading mechanism is used to fix a second friction test workpiece. The second friction test workpiece has a first state of abutting against the first friction test workpiece and a second state of being separated from the first friction test workpiece.

2. The friction testing machine according to claim 1, characterized in that: The first drive mechanism includes a first drive motor, a first transmission shaft, a second transmission shaft, a first bevel gear, a second bevel gear, a turntable, and a connecting rod. The turntable is rotatably supported on the first frame via a rotating shaft. The second transmission shaft is rotatably supported on the first frame. The first bevel gear is disposed at one end of the second transmission shaft, and the second bevel gear is disposed on the rotating shaft supporting the turntable. The first bevel gear and the second bevel gear mesh. The first drive motor is disposed on the first frame. One end of the first transmission shaft is connected to the output shaft of the first drive motor via a universal joint, and the other end of the first transmission shaft is connected to the end of the second transmission shaft away from the first bevel gear via a universal joint. One end of the connecting rod is hinged to the turntable, and the other end of the connecting rod is hinged to one end of the guide rod.

3. The friction testing machine according to claim 1, characterized in that: The loading mechanism includes a second frame, a second drive mechanism, a positioning seat, a force transmission mechanism, and a specimen clamping head. The second drive mechanism is located at the upper end of the second frame. The positioning seat is located inside the second frame and below the second drive mechanism. The positioning seat has a guide hole. The force transmission mechanism passes through the guide hole and is slidably engaged. The upper end of the force transmission mechanism is connected to the second drive mechanism. The second drive mechanism is used to drive the force transmission mechanism to slide up and down. The specimen clamping head is located at the lower end of the force transmission mechanism and directly above the clamp.

4. The friction testing machine according to claim 3, characterized in that: The force transmission mechanism includes a force transmission rod, an upper flange, and a lower flange. The force transmission rod passes through the guide hole and is slidably fitted. The upper flange is disposed at the upper end of the force transmission rod and is connected to the second drive mechanism. The lower flange is disposed at the lower end of the force transmission rod, and the specimen clamping head is fixed to the lower flange.

5. The friction testing machine according to claim 4, characterized in that: A pressure sensor is provided at the connection between the upper flange and the second drive mechanism.

6. The friction testing machine according to claim 4, characterized in that: The number of force transmission rods is at least two, and the number of guide holes is the same as the number of force transmission rods and corresponds one-to-one.

7. The friction testing machine according to claim 4, characterized in that: The second drive mechanism is one of a hydraulic cylinder, a linear motor, or a linear module.

8. The friction testing machine according to claim 7, characterized in that: The second drive mechanism is a hydraulic cylinder. The upper end of the cylinder body is connected to the second frame by bolts, and the lower end of the telescopic rod of the hydraulic cylinder is connected to the upper flange.

9. The friction testing machine according to claim 3, characterized in that: The specimen clamping head is a three-jaw chuck or a four-jaw chuck.

10. The friction testing machine according to claim 3, characterized in that: The lower ends of the support legs of the first frame and the second frame are provided with adjusting feet, which are threadedly connected to the support legs of the first frame and the second frame.

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