CN217966737U - DMA Double Cantilever Beam Fixture Positioning Device - Google Patents

Abstract

The utility model relates to a DMA double cantilever beam anchor clamps positioner, including setting up the support on the anchor clamps base, be equipped with the slide rail on the support, be equipped with the slider on the slide rail, be equipped with the screw on the slider, be equipped with the lead screw on the screw, the lead screw both ends are passed through the bearing and are installed on the support, lead screw one end is connected with the knob, the slider upper end is equipped with the mounting panel along the perpendicular to lead screw direction, the mounting panel both ends are equipped with the long slab respectively, the long slab front end is equipped with the locating plate, be equipped with the scale on the support. Has the advantages of reasonable structural design, positioning of the sample, high positioning precision, simple and convenient operation and the like.

Description

DMA Double Cantilever Beam Fixture Positioning Device

Technical field:

The utility model relates to the technical field of dynamic thermomechanical analyzers, in particular to a DMA double cantilever beam fixture positioning device capable of centering and positioning samples.

Background technique:

Dynamic Mechanical Analyzers (DMA) are designed to characterize material properties as a function of temperature, time, frequency, and stress. DMA is an important means to test the mechanical properties of materials, and can test the mechanical properties of samples such as tensile, bending, shearing and compression. In different deformation modes, different fixtures need to be installed on the DMA. For example, when we study the water disinfection performance of nanofiber membranes, we consider that nanofiber membranes will be continuously impacted by water flow during water filtration, so that nanofiber membranes Bending deformation, so it is necessary to use DMA and its double cantilever beam fixture to test the bending performance of the nanofiber membrane. DMA products from METTLER TOLEDO are used in our laboratory.

As shown in Figure 4, it is a structural schematic diagram of the existing double cantilever beam fixture. The existing double cantilever beam fixture mainly includes a clamp base, and the clamp base is provided with an end compression assembly (fixed) for clamping the two ends of the sample And the movable pressing assembly (movable) that is arranged in the middle, the movable pressing assembly moves up and down during the test. According to the test requirements, the sample should be perpendicular to the compression components, and the sample should be in the middle of each compression component, so that the test results obtained can be accurate and reliable. However, there is no positioning component in the existing double cantilever beam fixture. When we do the test, we can only rely on the naked eye for rough positioning. This will undoubtedly have a negative impact on the sample test, and the reproducibility of the test results cannot be achieved.

It should be noted that the above content belongs to the scope of the inventor's technical cognition and does not necessarily constitute the prior art.

Utility model content:

The purpose of the utility model is to solve the problems existing in the prior art, and provide a DMA double cantilever beam fixture positioning device, which has the advantages of reasonable structure design, sample positioning, high positioning accuracy, and easy operation.

The utility model realizes above-mentioned purpose by taking following technical scheme:

The DMA double cantilever beam clamp positioning device includes a bracket arranged on the base of the clamp, a slide rail is provided on the bracket, a slide block is provided on the slide rail, a nut is provided on the slide block, and a nut is mounted on the nut A lead screw is provided, the two ends of the lead screw are installed on the bracket through bearings, one end of the lead screw is connected with a knob, and the upper end of the slider is provided with a mounting plate along a direction perpendicular to the lead screw, and the two ends of the mounting plate are respectively A long board is provided, a positioning board is provided at the front end of the long board, and a scale is provided on the support.

The bracket includes two L-shaped legs arranged at intervals, the L-shaped legs are fastened to the fixture base by bolts, a support plate is provided on the upper end of the L-shaped legs, and a slide rail is provided on the support plate .

The utility model adopts the above-mentioned technical scheme, which can bring the following beneficial effects:

By installing the positioning device of the present application on one side of the existing fixture support, it is ensured that the normal clamping work of the double cantilever beam fixture will not be affected. At the same time, the position of the positioning plate is manually adjusted by the screw drive, and it is adjusted accurately according to the scale. In turn, it is beneficial to improve the installation accuracy of the sample.

Description of drawings:

Fig. 1 is the structural representation of the positioning device of the present invention installed on the double cantilever beam fixture;

Fig. 2 is a structural schematic diagram of the assembly of the positioning device of the present invention and the clamp base;

Fig. 3 is the structural schematic diagram of the positioning device of the present invention;

Fig. 4 is the structural representation of existing double cantilever beam fixture;

In the figure, 1, bracket, 101, L-shaped leg, 102, bolt, 103, support plate, 2, slide rail, 3, slider, 4, screw nut, 5, screw rod, 6, bearing, 7, knob , 8, mounting plate, 9, long plate, 10, positioning plate, 11, scale, 12, fixture base, 13, end pressing component, 14, middle pressing component, 15, chute, 16, sample.

detailed description:

In order to illustrate the overall concept of the present utility model more clearly, the following will be described in detail by way of examples in conjunction with the accompanying drawings.

In the following description, a lot of specific details have been set forth in order to fully understand the utility model, but the utility model can also be implemented in other ways different from those described here, therefore, the protection scope of the utility model is not limited by the following limitations of the specific embodiments disclosed.

Each embodiment in this specification is described in a progressive manner, the same and similar parts of each embodiment can be referred to each other, and each embodiment focuses on the differences from other embodiments.

In the present application, terms such as "upper end", "lower end" and "one end" are used for descriptive purposes only, and should not be understood as indicating or implying relative importance or implicitly specifying the position of indicated technical features.

In this utility model, unless otherwise clearly specified and limited, terms such as "provided", "set", "connected", "connected" and other terms should be understood in a broad sense, for example, "provided" and "set" can be It can be fixed installation, detachable installation, or integrated; "connection" can be directly connected or connected through an intermediary, and "communication" in this application mainly refers to gas path communication. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present utility model according to specific situations.

As shown in Figure 1-3, the DMA double cantilever beam clamp positioning device includes a bracket 1 arranged on the clamp base 12, a slide rail 2 is provided on the bracket 1, and a slider 3 is provided on the slide rail 2, The slider 3 is provided with a nut 4, the nut 4 is provided with a screw 5, the two ends of the screw 5 are installed on the bracket 1 through the bearing 6, and one end of the screw 5 is connected with a knob 7 , the upper end of the slider 3 is provided with a mounting plate 8 along the direction perpendicular to the lead screw 5, the two ends of the mounting plate 8 are respectively provided with a long plate 9, the front end of the long plate 9 is provided with a positioning plate 10, and the support 1 There is a scale 11 on it. By being provided with the positioning device of the present application on one side of the existing clamp support 12, it is ensured that the normal clamping work of the double cantilever beam clamp will not be affected. Precise adjustment is conducive to improving the installation accuracy of the sample.

The bracket 1 includes two L-shaped legs 101 arranged at intervals, the L-shaped legs 101 are fastened on the clamp base 12 by bolts 102, and the upper end of the L-shaped legs 101 is provided with a support plate 103. A slide rail 2 is provided on the support plate 103 . The structural design of the support 1 is simpler and more practical, and the installation is convenient.

Instructions for use of the positioning device of this application:

Firstly, the structure of the existing double-cantilever beam clamp is briefly described. The existing double-cantilever beam clamp includes a clamp base 12, a chute 15 is provided on the clamp base 12, and two end pressing components 13 are arranged at intervals on the chute 15. The middle pressing assembly 14 is arranged at the center of the clamp base 12 .

During installation, the positioning device of the present application is arranged on one side of the chute 15, the slide rail 2 and the lead screw 5 are arranged perpendicular to the chute 15, and the two positioning plates 10 are symmetrically distributed on both sides of the middle pressing assembly 14. The other side of the chute 15 usually needs to install a temperature measuring device (the existing structure of the temperature measuring device is not shown in the figure).

When installing the sample, first measure the length and width of the sample 16, adjust the distance between the two end positioning components 13 appropriately according to the length (the existing fixture has its own function), and then adjust the position of the positioning plate 10 according to the width of the sample, such as the sample width is L, the distance from the positioning plate 10 to the center line of the chute 15 is L/2, and the screw 5 is driven to rotate by the rotating knob 7, and the rotation of the screw 5 drives the slider 3 to move along the slide rail 2, thereby changing the position of the positioning plate 10. Position, ensure that the positioning plate 10 can move to an accurate position by the scale 11. First place the sample 16 on the end compression assembly 13 and the middle compression assembly 14, then align the side of the sample 16 with the positioning plate 10, then pass the screws on the end compression assembly 13 and the middle compression assembly 14 Fix the sample 16 well, after the sample 16 is fixed, the positioning plate 10 is detached from the sample by rotating the knob 7 in the opposite direction, and finally the bending test can be performed.

The above-mentioned specific implementation manners cannot be regarded as limitations on the protection scope of the present utility model. For those skilled in the art, any alternative improvements or transformations made to the embodiments of the present utility model fall within the protection scope of the present utility model.

The parts of the utility model that are not described in detail are the known techniques of those skilled in the art.

Claims (2)

1. DMA double cantilever beam anchor clamps positioner, its characterized in that, including setting up the support on the anchor clamps base, be equipped with the slide rail on the support, be equipped with the slider on the slide rail, be equipped with the screw on the slider, be equipped with the lead screw on the screw, the lead screw both ends are passed through the bearing and are installed on the support, lead screw one end is connected with the knob, the slider upper end is equipped with the mounting panel along the perpendicular to lead screw direction, the mounting panel both ends are equipped with the long slab respectively, the long slab front end is equipped with the locating plate, be equipped with the scale on the support.
2. 2. The DMA double-cantilever clamp positioning device according to claim 1, wherein the support comprises two L-shaped legs arranged at intervals, the L-shaped legs are fastened on the clamp base through bolts, a support plate is arranged at the upper end of each L-shaped leg, and a slide rail is arranged on each support plate.

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