Sliding block for testing friction coefficient

Abstract

The utility model discloses a sliding block for testing friction coefficient, which comprises a sliding block main body, a fixed block is arranged in the middle of the top end of the sliding block main body, through cavities are symmetrically arranged on the fixed block, a connecting rod is movably arranged in each cavity in a penetrating manner, an elastic component is further arranged in each cavity, and the elastic component is abutted against the connecting rod. Space allowing the connecting rods to move in the telescopic direction of the elastic assembly is formed in the cavity, a pressing plate is fixed to each connecting rod, pressing grooves are symmetrically formed in one side of the top end of the sliding block body, and each pressing plate is in movable contact with one pressing groove. When the sliding block is used for fixing a sample, the edges of the two pressing plates are held by hands to apply pressure to the direction of the fixing block, the pressing plates turn over in the process of translating to the direction of the elastic assembly, the limiting protrusions leave the pressing grooves, the two ends of the sample are placed in the pressing grooves respectively, and then the pressing plates are loosened for fixing. The sample fixing device is convenient to operate and can be suitable for samples with different thicknesses, and the samples can be fixed more stably.

Description

Technical Field

[0001] The utility model relates to a testing slider, in particular to a friction coefficient testing slider. Background Art

[0002] When measuring the friction coefficient of a plastic film / sheet during the initial friction and sliding process between it and other materials, it is necessary to first cut the sample to be tested into relevant standard sizes as test specimens, fix one piece on the test table of the tester, and fix the other piece on the slider. The slider is then fixed on the tester and driven by the tester to slide on the test table.

[0003] The sliders of similar testers on the market are usually fixed with tape ( Figure 1 ), magnetic suction clamping ( Figure 2 )、Spring tie rod fixation( Figure 3 ) There are several ways. The above methods have the following problems:

[0004] 1. Tape pasting: cumbersome operation, low efficiency, and difficult to clean.

[0005] 2. Magnetic clamping: There are certain requirements for the thickness of the sample. The clamping force of thicker samples will be greatly weakened; the magnetic force of the magnet may affect the test results.

[0006] 3. Spring pull rod fixing: The operation is cumbersome, it is not easy to hold the slider by hand during the clamping process of the sample, and the spring tension force is weak. Utility Model Content

[0007] In order to overcome the deficiencies of the prior art, the utility model provides a sliding block for testing a friction coefficient.

[0008] The purpose of the utility model is achieved by the following technical solutions:

[0009] A slider for testing a coefficient of friction comprises a slider body, a fixed block is arranged at the middle part of the top end of the slider body, symmetrically provided with penetrating cavities are arranged on the fixed block, a connecting rod is movably inserted in each of the cavities, an elastic component is also arranged in each of the cavities, the elastic component abuts against the connecting rod, and there is space in the cavity for the connecting rod to move along the extension and contraction direction of the elastic component, a pressure plate is fixed to each of the connecting rods, and pressure grooves are symmetrically provided on one side of the top end of the slider body, and each of the pressure plates is movably contacted with one of the pressure grooves.

[0010] Furthermore, the elastic component is a spring, the fixing block is provided with an installation chamber perpendicular to the direction of the cavity, the installation chamber is communicated with the cavity, the spring is arranged in the installation chamber, and one end of the spring is in contact with the connecting rod.

[0011] Furthermore, a groove is formed on one side of the pressing plate close to the fixing block, and a side wall of the fixing block is in movable contact with a side wall of the groove.

[0012] Furthermore, a limiting protrusion is provided at the bottom of the pressing plate, and the limiting protrusion is in movably contact with the pressing groove.

[0013] Furthermore, a pin is provided on one side of one of the pressure plates away from the fixing block, and the pin is located outside the slider body.

[0014] Furthermore, a handle is provided on the fixing block.

[0015] Furthermore, a weight positioning block is arranged on the fixing block.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] When the slider is used to fix the sample, the edges of the two pressure plates are held and pressed toward the fixed block. During the pressure application, the elastic component is compressed, and the pressure plate is flipped during the translation toward the elastic component, and the limiting protrusion leaves the pressure groove; one end of the sample is placed in one of the pressure grooves, the corresponding pressure plate is released, and the edge of the sample is fixed by the limiting protrusion; then the other end of the sample is passed around the outside of the slider body and placed in another pressure groove, and the other pressure plate is released, and the edge is fixed by the limiting protrusion. The operation is convenient, and it can be applied to samples of different thicknesses, and the fixation of the sample is more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The structure of the prior art is shown in FIG. Figure 1 ;

[0019] Figure 2 The structure of the prior art is shown in FIG. Figure 2 ;

[0020] Figure 3 The structure of the prior art is shown in FIG. Figure 3 ;

[0021] Figure 4 It is a schematic diagram of the use structure of the utility model;

[0022] Figure 5 It is a schematic diagram of the positional relationship between the slider body and the fixed block;

[0023] Figure 6 It is a cross-sectional view of the utility model;

[0024] In the figure: 1. Slider body; 2. Fixed block; 21. Cavity; 22. Mounting compartment; 3. Connecting rod; 4. Spring; 5. Pressure plate; 6. Pressure groove; 7. Pin; 8. Handle; 9. Weight positioning block; 10. Magnet; 11. Pull rod. DETAILED DESCRIPTION

[0025] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. The drawings provide preferred embodiments of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0026] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0028] like Figure 4-Figure 6As shown, a slider for testing coefficient of friction includes a slider body 1, a fixing block 2 is arranged at the middle of the top of the slider body 1, a handle 8 and a weight positioning block 9 are arranged on the fixing block 2, and an additional weight (counterweight block) can be fixed through the weight positioning block 9 to increase the mass of the entire slider to cope with different test standards. For example, some standards require that the mass of the weight is A, and the mass of the weight positioning block 9 itself is B, and a counterweight block with a mass of AB can be placed on the weight positioning block 9. The fixed block 2 is symmetrically provided with through cavities 21, and a connecting rod 3 is movably inserted in each cavity 21. An elastic component is also provided in each cavity 21, and the elastic component abuts against the connecting rod 3. There is space in the cavity 21 for the connecting rod 3 to move along the telescopic direction of the elastic component. A pressing plate 5 is fixed to each connecting rod 3, and a groove is provided on the side of the pressing plate 5 close to the fixed block 2. The side wall of the fixed block 2 is in movable contact with the side wall of the groove. A limiting protrusion is provided at the bottom of each pressing plate 5, and a pressing groove 6 is symmetrically provided on one side of the top of the slider body 1. Each limiting protrusion is movably contacted with one of the pressing grooves 6. A pin 7 is provided on the side of one of the pressing plates 5 away from the fixed block 2, and the pin 7 is located on the outside of the slider body 1.

[0029] When the slider is used to fix the sample, the edges of the two pressure plates 5 are held and pressure is applied in the direction of the fixed block 2. During the pressure application, the elastic component is compressed, and the pressure plate 5 is flipped during the translation in the direction of the elastic component, and the limiting protrusion leaves the pressure groove 6; one end of the sample is placed in one of the pressure grooves 6, and the corresponding pressure plate 5 is released. Under the elastic force of the elastic component, the limiting protrusion fixes the edge of the sample; then the other end of the sample is passed around the outside of the slider body 1 and placed in another pressure groove 6, and the other pressure plate 5 is released, and the edge is fixed by the limiting protrusion. After the fixation is completed, the sample is close to the bottom of the slider body 1. During the test, the pin 7 is fixed on the tester, and the slider body 1 is driven to move by the tester. The utility model is easy to operate, can be applied to samples of different thicknesses, and the fixation of the sample is more stable.

[0030] In a preferred embodiment, the elastic component is a spring 4, and the fixing block 2 is provided with an installation chamber 22 in a direction perpendicular to the cavity 21, the installation chamber 22 is communicated with the cavity 21, and the spring 4 is arranged in the installation chamber 22, one end of the spring 4 abuts against the connecting rod 3, and the other end can be fixed in the installation chamber 22 or not. In order to make the pressure plate 5 move smoothly, two installation chambers 22 can be symmetrically provided, and a spring 4 is arranged in each installation chamber 22.

[0031] When the sample needs to be fixed, hold the edges of the two pressing plates 5 and apply pressure in the direction of the fixed block 2. During the pressure application, the spring 4 is compressed, and the pressing plate 5 flips during the translation in the direction of the spring 4. The limiting protrusion is removed from the pressing groove 6, and the edge of the sample is placed in the pressing groove 6. The corresponding pressing plate 5 is released, and under the elastic force of the spring 4, the limiting protrusion presses the edge of the sample.

[0032] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A slider for testing friction coefficient, characterized in that: It includes a slider body, a fixed block is provided at the middle of the top of the slider body, and the fixed block is symmetrically provided with through cavities, a connecting rod is movably inserted in each of the cavities, and an elastic component is also provided in each of the cavities, the elastic component abuts against the connecting rod, and there is space in the cavity for the connecting rod to move along the extension and contraction direction of the elastic component, each of the connecting rods is fixed with a pressure plate, and pressure grooves are symmetrically provided on one side of the top of the slider body, and each of the pressure plates is movably contacted with one of the pressure grooves.

2. A sliding block for testing friction coefficient according to claim 1, characterized in that: The elastic component is a spring, the fixing block is provided with an installation chamber perpendicular to the direction of the cavity, the installation chamber is communicated with the cavity, the spring is arranged in the installation chamber, and one end of the spring is in contact with the connecting rod.

3. A sliding block for testing coefficient of friction as claimed in claim 1, characterized in that: A groove is formed on one side of the pressing plate close to the fixing block, and a side wall of the fixing block is in active contact with a side wall of the groove.

4. A sliding block for testing coefficient of friction as claimed in claim 1, characterized in that: A limiting protrusion is arranged at the bottom of the pressing plate, and the limiting protrusion is in movably contact with the pressing groove.

5. A sliding block for testing coefficient of friction as claimed in claim 1, characterized in that: A pin is provided on one side of one of the pressing plates away from the fixing block, and the pin is located outside the slider body.

6. A sliding block for testing friction coefficient according to claim 1, characterized in that: The fixing block is provided with a handle.

7. A sliding block for testing friction coefficient according to claim 1, characterized in that: A weight positioning block is arranged on the fixing block.

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