Rotary member for a friction and wear tester sample stage

Abstract

The utility model relates to a kind of rotating components for friction and wear testing machine sample stage, including down pressure lever;The bottom of the down pressure lever is equipped with connecting seat, the outside of the connecting seat is detachably installed with placing seat, the bottom of the placing seat is formed with a protruding portion downwards protruding, the inside of the placing seat is hollow and upper end face and lower section are all open. The rotating component for friction and wear testing machine sample stage, the device is fixed friction pair by multiple limiting structures, can effectively prevent the displacement of friction pair, shaking in test process, ensure that the contact position of friction pair and sample, contact pressure always meet test preset requirement, avoid the friction track deviation or pressure fluctuation caused by component instability. At the same time, friction pair is directly extended to the bottom of placing seat and contacted with sample, without intermediate component interference, ensure the purity of friction process, so that test data can truly reflect the friction and wear performance of sample, improve the accuracy and reliability of data.

Description

Technical Field

[0001] This utility model relates to the field of friction and wear testing machine technology, specifically a rotating component for a sample stage of a friction and wear testing machine. Background Technology

[0002] In the field of materials performance testing, tribological testing machines are core equipment for evaluating the durability and reliability of materials. They are widely used in the tribological property testing of various materials such as metals, ceramics, and polymers. The test results provide crucial information for material selection and product design in fields such as machinery manufacturing, automotive industry, and aerospace. The sample stage rotating component, as the core part of the testing machine, is responsible for achieving the relative movement and stable contact between the friction pair and the sample to be tested. The rationality of its structural design directly determines the stability of the testing process, the accuracy of the test data, and the ease of operation.

[0003] The limiting and contact guiding design of friction pairs in existing friction and wear testing machines is imperfect. Most components are only radially limited by the inner wall of the fixed seat, lacking an axial limiting structure. During the test, the friction pair is prone to upward movement, causing a sudden change in contact pressure. In addition, the fit between the inner wall of the fixed seat and the spherical friction pair is poor and the contact area is small, which can easily lead to local stress concentration, shortening the life of the friction pair. It can also cause irregular friction trajectories, making it impossible to accurately simulate actual wear scenarios and reducing the reference value of test data. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a rotating component for the sample stage of a friction and wear testing machine, which solves the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a rotating component for a sample stage of a friction and wear testing machine, including a pressure rod;

[0006] The bottom of the pressure rod is equipped with a connecting seat, and a placement seat is detachably installed on the outside of the connecting seat. The bottom of the placement seat protrudes downward to form a protrusion. The interior of the placement seat is hollow and both the upper end face and the lower cross-section are open.

[0007] A spherical friction pair is placed inside the placement base, and the diameter of the friction pair is larger than the diameter of the bottom opening of the placement base;

[0008] A limiting rod is installed at the bottom of the connecting seat, with one end abutting against the friction pair, so that the limiting rod abuts against the top of the friction pair after the connecting seat and the placement seat are docked.

[0009] Furthermore, the placement seat is funnel-shaped.

[0010] Furthermore, the outer side of the connecting seat is provided with an external thread, and the inner circumferential wall of the placement seat that is in contact with the connecting seat is provided with an internal thread that is adapted to the external thread, so that the connecting seat and the placement seat can be detachably connected by threads.

[0011] Furthermore, corresponding to the friction pair, an arc-shaped surface adapted to the outer peripheral surface of the friction pair is provided on the side of the placement seat that is in contact with the friction pair, so as to increase the contact area between the friction pair and the placement seat.

[0012] Furthermore, the bottom end of the limiting rod is recessed upward to form a concave portion, and the friction pair is embedded inside the concave portion and fits against the inner peripheral wall of the concave portion.

[0013] Furthermore, a portion of the friction pair extends to the bottom of the placement seat.

[0014] Furthermore, a rotating component is integrally formed on the outer side of the placement base, and the top projection of the rotating component is a regular hexagon.

[0015] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0016] The sample stage of this friction and wear testing machine uses a rotating component. The device fixes the friction pair through a multi-limiting structure, which effectively prevents the friction pair from shifting or shaking during the test. This ensures that the contact position and contact pressure between the friction pair and the sample always meet the preset test requirements, avoiding friction trajectory deviation or pressure fluctuations caused by component instability. Simultaneously, the friction pair extends directly to the bottom of the placement seat to contact the sample, without interference from intermediate components, ensuring the purity of the friction process. This allows the test data to truly reflect the friction and wear performance of the sample, improving the accuracy and reliability of the data. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0019] Figure 3 This is a schematic diagram of the disassembled structure of this utility model;

[0020] Figure 4 This utility model Figure 3 A schematic diagram of the structure viewed from below.

[0021] In the diagram: 1. Pressing rod; 2. Connecting seat; 3. Placement seat; 4. Friction pair; 5. Limiting rod. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figure 1-4 The rotating component for the sample stage of the friction and wear testing machine in this embodiment mainly consists of a pressure rod 1, a connecting seat 2, a placement seat 3, a friction pair 4, and a limiting rod 5.

[0024] Specifically, the pressure rod 1 is a connecting component between the component and the main body of the testing machine. A connecting seat 2 is fixedly installed at its bottom. The outer side of the connecting seat 2 is detachably connected to the placement seat 3 through threads. In detail, an external thread is provided on the outer side of the connecting seat 2, and a matching internal thread is provided on the inner circumferential wall of the placement seat 3 that fits against the connecting seat 2. The operator can complete the assembly or disassembly of the connecting seat 2 by rotating the placement seat 3, which is convenient to operate.

[0025] A spherical friction pair 4 is placed inside the placement base 3. The diameter of the friction pair 4 is larger than the diameter of the bottom opening of the placement base 3 to prevent the friction pair 4 from falling off the bottom of the placement base 3. At the same time, part of the friction pair 4 extends to the bottom of the placement base 3 to ensure that the friction pair 4 can fully contact the sample on the sample stage during the test. To increase the contact area between the friction pair 4 and the placement base 3 and improve the stability of the friction pair 4 in the placement base 3, an arc-shaped surface adapted to the outer peripheral surface of the friction pair 4 is provided on the side of the placement base 3 that is in contact with the friction pair 4. The arc-shaped surface can fit tightly with the surface of the spherical friction pair 4 to prevent the friction pair 4 from shaking in the placement base 3.

[0026] In detail, the placement seat 3 is funnel-shaped, hollow inside, and both the upper and lower surfaces are open. The bottom protrudes downward to form a protrusion, which facilitates the accommodation and fixation of the friction pair 4.

[0027] Furthermore, a limiting rod 5 is fixedly installed at the bottom of the connecting seat 2. One end of the limiting rod 5 extends into the interior of the placement seat 3 and abuts against the friction pair 4. The bottom end of the limiting rod 5 is concave upward to form a concave part. The friction pair 4 is embedded in the concave part and fits against the inner peripheral wall of the concave part.

[0028] In actual setup, the limiting rod 5 limits the friction pair 4 from above to prevent the friction pair 4 from shifting upward during the test. At the same time, the concave part further restricts the radial movement of the friction pair 4 by fitting with the friction pair 4, ensuring that the friction pair 4 is always in the preset working position. In addition, a rotating part is integrally formed on the outside of the placement seat 3. The top projection of the rotating part is a regular hexagon. The operator can use tools such as a wrench to hold the regular hexagonal rotating part and rotate the placement seat 3 more effortlessly to achieve threaded assembly or disassembly with the connecting seat 2.

[0029] In practical testing, the operator first places the spherical friction pair 4 inside the placement seat 3, ensuring that the friction pair 4 fits against the arc-shaped surface of the placement seat 3 and partially extends beyond the bottom of the placement seat 3. Then, the placement seat 3 is aligned with the connecting seat 2. By rotating the regular hexagonal rotating component on the outer side of the placement seat 3, the placement seat 3 and the connecting seat 2 are fixed together by threads. At this point, the concave part at the bottom of the limiting rod 5 at the bottom of the connecting seat 2 precisely engages the top of the friction pair 4, completing the double fixation of the friction pair 4. Next, the lower pressure rod 1 is connected to the power output component of the friction and wear testing machine. The testing machine drives the lower pressure rod 1 downwards, causing the friction pair 4 to contact the sample to be tested on the sample platform and applying a preset pressure. During the test, the testing machine can drive the workpiece to rotate, causing the friction pair 4 to rub against the sample surface, simulating actual wear scenarios and completing the friction and wear performance test.

[0030] The working principle of the above embodiments is as follows:

[0031] (1) First, the spherical friction pair 4 is placed inside the funnel-shaped placement seat 3. Utilizing the adaptability of the arc-shaped surface of the inner wall of the placement seat 3 with the outer circumferential surface of the friction pair 4, the friction pair 4 naturally conforms to the arc-shaped surface. At this time, because the diameter of the friction pair 4 is larger than the bottom opening of the placement seat 3, it is confined inside the placement seat 3 and will not fall off. It also extends partially to the bottom of the placement seat 3, forming the basic conditions for contact with the sample. Subsequently, the placement seat 3 is aligned with the connecting seat 2. Using the regular hexagonal rotating part on the outside of the placement seat 3, the placement seat 3 is rotated with a tool, so that the external thread of the connecting seat 2 gradually engages with the internal thread of the placement seat 3 until the placement seat 3 and the connecting seat 2 are tightly connected. During this process, the limiting rod 5 at the bottom of the connecting seat 2 simultaneously extends into the placement seat 3, and its bottom concave part just fits against the top of the friction pair 4, embedding and fixing the friction pair 4.

[0032] (2) The assembled rotating component is connected to the power system of the friction and wear testing machine via the pressure rod 1. The testing machine sets parameters such as pressure and speed according to the test requirements. After the test is started, the testing machine first drives the pressure rod 1 to move downward in the vertical direction. The pressure rod 1 transmits the downward pressure to the connecting seat 2, and the connecting seat 2 then transmits it to the placement seat 3 and the friction pair 4 in sequence, so that the friction pair 4 extending to the bottom of the placement seat 3 is in close contact with the surface of the sample to be tested on the sample stage and maintains the preset contact pressure. When the contact pressure reaches the set value, the testing machine drives the sample to rotate or swing, forming relative motion to generate continuous relative friction, simulating the wear scenario in actual application.

[0033] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A rotating component for a sample stage of a friction and wear testing machine, characterized in that: Including the pressure bar; The bottom of the pressure rod is equipped with a connecting seat, and a placement seat is detachably installed on the outside of the connecting seat. The bottom of the placement seat protrudes downward to form a protrusion. The interior of the placement seat is hollow and both the upper end face and the lower cross-section are open. A spherical friction pair is placed inside the placement base, and the diameter of the friction pair is larger than the diameter of the bottom opening of the placement base; A limiting rod is installed at the bottom of the connecting seat, with one end abutting against the friction pair, so that the limiting rod abuts against the top of the friction pair after the connecting seat and the placement seat are docked.

2. The rotating component for the sample stage of a friction and wear testing machine according to claim 1, characterized in that: The placement seat is funnel-shaped.

3. The rotating component for the sample stage of a friction and wear testing machine according to claim 1, characterized in that: The connecting seat has an external thread on its outer side, and the inner circumferential wall of the placement seat, which is in contact with the connecting seat, has an internal thread that matches the external thread, so that the connecting seat and the placement seat can be detachably connected by threads.

4. The rotating component for the sample stage of a friction and wear testing machine according to claim 1, characterized in that: Corresponding to the friction pair, an arc-shaped surface adapted to the outer peripheral surface of the friction pair is provided on the side of the placement seat that is in contact with the friction pair, so as to increase the contact area between the friction pair and the placement seat.

5. A rotating component for a sample stage of a friction and wear testing machine according to claim 1, characterized in that: The bottom end of the limiting rod is recessed upward to form a concave portion, and the friction pair is embedded inside the concave portion and fits against the inner peripheral wall of the concave portion.

6. The rotating component for the sample stage of a friction and wear testing machine according to claim 1, characterized in that: The friction pair extends to the bottom of the mounting base.

7. The rotating component for the sample stage of a friction and wear testing machine according to claim 1, characterized in that: A rotating component is integrally formed on the outer side of the placement base, and the top projection of the rotating component is a regular hexagon.

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