Loading mechanism of friction testing machine

Abstract

The utility model discloses a loading mechanism of a friction testing machine, which belongs to the technical field of pressurizing equipment, and comprises a rack, a driving mechanism, a positioning seat, a force transmission mechanism and a test piece clamping head, the driving mechanism is arranged at the upper end of the rack, the positioning seat is arranged in the rack and is positioned below the driving mechanism, and the force transmission mechanism is arranged at the lower end of the rack. A guide hole is formed in the positioning seat, the force transmission mechanism penetrates through the guide hole and is in sliding fit with the guide hole, the upper end of the force transmission mechanism is connected with the driving mechanism, the driving mechanism is used for driving the force transmission mechanism to slide up and down, and the test piece clamping head is arranged at the lower end of the force transmission mechanism. The device is simple in structure and convenient to operate, pressure applied to a test piece can be monitored in real time, pressure adjustment can be conducted according to conditions in the test process, shutdown is not needed when the 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 loading mechanism for 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 usually cannot change the load during the test. If the load needs to be adjusted, the machine needs to be stopped, which makes operation inconvenient. Moreover, due to vibration, pressure errors may be large, resulting in inaccurate test results. Utility Model Content

[0003] The purpose of this utility model is to provide a loading mechanism for a friction testing machine, which 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] The present invention provides a loading mechanism for a friction testing machine, including a frame, a drive mechanism, a positioning seat, a force transmission mechanism, and a specimen clamping head. The drive mechanism is disposed at the upper end of the frame, the positioning seat is disposed inside the frame and below the 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 drive mechanism, the 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.

[0006] 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 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.

[0007] Furthermore, a pressure sensor is provided at the connection between the upper flange and the drive mechanism.

[0008] 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.

[0009] Furthermore, there are four force transmission rods and four guide holes, which are evenly distributed on the same circumference.

[0010] Furthermore, the drive mechanism is one of a hydraulic cylinder, a linear motor, or a linear module.

[0011] Furthermore, the driving mechanism is a hydraulic cylinder, the upper end of the cylinder body of the hydraulic cylinder is connected to the frame by bolts, and the lower end of the telescopic rod of the hydraulic cylinder is connected to the upper flange.

[0012] Furthermore, the specimen clamping head is a three-jaw chuck or a four-jaw chuck.

[0013] Furthermore, the frame is provided with adjusting feet at the four corners of its bottom, and the adjusting feet are threadedly connected to the frame.

[0014] The beneficial effects of this utility model are as follows:

[0015] The friction testing machine loading mechanism provided by this utility model has a simple structure and is easy to operate. It can monitor the pressure applied to the specimen in real time, and the pressure can be adjusted according to the situation during the test. 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

[0016] 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.

[0017] Figure 1 This is a schematic diagram of the loading mechanism of the friction testing machine of this utility model;

[0018] Figure 2 This is a schematic diagram of the positioning seat.

[0019] Figure 3 This is a schematic diagram of the force transmission mechanism.

[0020] In the diagram: 1-Frame; 11-Adjusting foot; 2-Drive mechanism; 3-Positioning seat; 31-Guide hole; 4-Specimen clamping head; 5-Force transmission mechanism; 51-Force transmission rod; 52-Upper flange; 53-Lower flange; 6-Pressure sensor. Detailed Implementation

[0021] 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.

[0022] 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.

[0023] 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.

[0024] 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.

[0025] refer to Figure 1 As shown, this utility model embodiment provides a loading mechanism for a friction testing machine, including a frame 1, a drive mechanism 2, a positioning seat 3, a force transmission mechanism 5, and a specimen clamping head 4.

[0026] The frame 1 serves to support other components. In this embodiment, the frame 1 is a frame structure. The bottom of the frame 1 is provided with adjustable feet 11, which are threadedly connected to the frame 1. The adjustable feet 11 facilitate the adjustment of the level of the frame 1, ensuring that the frame 1 is placed stably on the ground.

[0027] The positioning seat 3 is installed inside the frame 1 and is connected to the frame 1 by bolts, which facilitates assembly and disassembly. A guide hole 31 is provided on the positioning seat 3 near the center (see reference). Figure 2As shown in the figure, the axis of the guide hole 31 is perpendicular to the ground, and the number of guide holes 31 is at least two. In this embodiment, there are four guide holes 31, which are evenly distributed on the same circumference.

[0028] refer to Figure 3 As shown, the force transmission mechanism 5 includes a force transmission rod 51, an upper flange 52, and a lower flange 53. The force transmission rod 51 passes through the guide hole 31 and is slidably engaged with the guide hole 31. The number of force transmission rods 51 is the same as the number of guide holes 31 and they correspond one-to-one.

[0029] The upper flange 52 is located at the upper end of the force transmission rod 51. The upper flange 52 is detachably connected to the force transmission rod 51. The upper ends of all four force transmission rods 51 are connected to the upper flange 52. For example, the upper end of the force transmission rod 51 can be machined into an external thread structure. The upper flange 52 has a through hole, through which the upper end of the force transmission rod 51 passes and is then locked with a nut. Of course, the upper end of the force transmission rod 51 can also be connected to the upper flange 52 through a fixing joint.

[0030] The lower flange 53 is located at the lower end of the force transmission rod 51. The lower flange 53 is detachably connected to the force transmission rod 51. The lower ends of all four force transmission rods 51 are connected to the lower flange 53. For example, the lower end of the force transmission rod 51 can be machined into an external thread structure. A through hole is opened on the lower flange 53, and the lower end of the force transmission rod 51 passes through the through hole and is then locked with a nut. Of course, the lower end of the force transmission rod 51 can also be connected to the lower flange 53 through a fixing joint.

[0031] The drive mechanism 2 is located at the upper end of the frame 1 and above the force transmission mechanism 5. The drive mechanism 2 is connected to the upper flange 52 and is used to drive the force transmission mechanism 5 to move up and down. In this embodiment, the drive mechanism 2 is a hydraulic cylinder. Hydraulic cylinders have high control precision and good stability. The upper end of the cylinder body is connected to the frame 1 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 52. The hydraulic cylinder also 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.

[0032] Of course, the drive mechanism 2 can also be a linear motor. In this case, the lower end of the drive shaft of the linear motor is rotatably connected to the upper flange 52. When the drive shaft of the linear motor moves up and down, it can drive the force transmission rod 51 to slide up and down. The drive mechanism 2 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 52 is connected to the slide on the linear module. When the slide moves up and down, it can drive the force transmission rod 51 to slide up and down.

[0033] A pressure sensor 6 is installed at the connection between the upper flange 52 and the telescopic rod of the hydraulic cylinder. The pressure sensor 6 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.

[0034] The specimen clamping head 4 is fixed to the lower end of the lower flange 53 and is used to clamp the specimen to be tested. The specimen clamping head 4 can be a three-jaw chuck or a four-jaw chuck. In this embodiment, a four-jaw chuck is selected because it is convenient to clamp the pin specimen.

[0035] The friction testing machine loading mechanism provided in this embodiment can be used in conjunction with a reciprocating mechanism or a rotating mechanism. The friction test area is located directly below the specimen clamping head 4. A flat specimen or friction plate is placed on the reciprocating mechanism or the rotating mechanism, and the flat specimen or friction plate is located directly below the four-jaw chuck. During the test, the pin specimen is clamped on the four-jaw chuck, and then the pin specimen is driven to move down by a hydraulic cylinder and abut against the flat specimen or friction plate on the reciprocating mechanism or the rotating mechanism. The hydraulic cylinder is controlled to apply the required pressure, and then the reciprocating mechanism drives the flat specimen or friction plate to slide back and forth, or the rotating mechanism drives the flat specimen or friction plate to rotate, thereby performing frictional motion with the pin specimen on the four-jaw chuck. The number of friction cycles and the friction time can be set as needed.

[0036] 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 loading mechanism characterized by: The device includes a frame, a drive mechanism, a positioning seat, a force transmission mechanism, and a specimen clamping head. The drive mechanism is located at the upper end of the frame, and the positioning seat is located inside the frame and below the drive mechanism. The positioning seat has a guide hole, and 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 drive mechanism, and the 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.

2. The tribological test machine loading mechanism of claim 1, wherein: 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 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.

3. The loading mechanism of the friction testing machine according to claim 2, characterized in that: A pressure sensor is provided at the connection between the upper flange and the drive mechanism.

4. The tribological test machine loading mechanism of claim 2, wherein: 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.

5. The tribological test machine loading mechanism of claim 4, wherein: The number of force transmission rods is four, and the number of guide holes is four, with the four guide holes evenly distributed on the same circumference.

6. The tribological test machine loading mechanism of claim 2, wherein: The drive mechanism is one of a hydraulic cylinder, a linear motor, or a linear module.

7. The tribological test machine loading mechanism of claim 6, wherein: The driving mechanism is a hydraulic cylinder. The upper end of the cylinder body is connected to the frame by bolts, and the lower end of the telescopic rod of the hydraulic cylinder is connected to the upper flange.

8. The tribological test machine loading mechanism of claim 1, wherein: The specimen clamping head is a three-jaw chuck or a four-jaw chuck.

9. The tribological test machine loading mechanism of claim 1, wherein: Adjustable feet are provided at the four corners of the bottom of the frame, and the adjustable feet are threadedly connected to the frame.

Images