Clamp for ultraviolet aging test

Abstract

The utility model relates to a clamp for an ultraviolet aging test. Comprising a support body, and the support body is provided with a clamping rod unit used for fixing a sample strip. The support body comprises a flat plate and vertical plates arranged on the two sides of the flat plate. The rod clamping unit is movably clamped between the vertical plates on the two sides and is used for fixing a sample strip between the rod clamping unit and the flat plate; the device has the advantages that the structure is simple, the design is reasonable, the irradiation area of ultraviolet rays can be increased, the fixing firmness of the sample strips is enhanced, the number of the sample strips in each test is increased, and the impact sample strips can be fixed.

Description

Technical Field

[0001] The utility model relates to the technical field of aging test appliances, and particularly relates to a fixture for ultraviolet aging test. Background Art

[0002] Ultraviolet aging test is to simulate the ultraviolet environment in natural climate and other conditions to conduct an accelerated weather resistance test on plastics to obtain the results of the weather resistance of materials. The above test method is to use an ultraviolet aging test chamber, place an ultraviolet light source in the chamber, fix the plastic sample strip on a fixture and irradiate a specific part to obtain the test results. Conventional fixtures include an irradiation plate, a test plate and a snap ring. The surface of the irradiation plate is provided with an ultraviolet irradiation window, and the part of the sample strip to be irradiated is placed corresponding to the ultraviolet irradiation window. The test plate is arranged at the rear of the sample strip, and finally the test plate is pressed tightly by the snap ring to fix the sample strip. The above fixtures have the following defects: 1. The area of the ultraviolet irradiation window is limited, resulting in a small number of sample strips in each test, and the accuracy of the test results cannot be guaranteed; 2. As is well known, the thickness of the sample strip is generally 2-4 mm, and the width is generally about 10 mm. Further, the above fixture is fixed by pressing the test plate with the snap ring, and the test plate presses the sample strip. The form of not directly pressing the sample strip easily causes the sample strip to fall off during a long-term test. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a fixture for ultraviolet aging test to solve the problems put forward in the above background art.

[0004] To achieve the above purpose, the utility model provides the following technical solutions:

[0005] A fixture for ultraviolet aging test, the fixture includes a bracket body, and a bar unit for fixing the sample strip is arranged on the bracket body; the bracket body includes a flat plate and vertical plates arranged on both sides of the flat plate; the bar unit is movably clamped between the two vertical plates on both sides for fixing the sample strip between the bar unit and the flat plate.

[0006] In the bracket body of the utility model, the flat plate is used to place the sample strip, and the vertical plates on both sides are used to cooperate with the bar unit to fix the sample strip. After the sample strip is fixed, ultraviolet rays can be irradiated on all positions except the position blocked by the bar unit, so as to increase the number of sample strips in each test and improve the accuracy of the test results. Further, the utility model directly fixes the sample strip through the bar unit to improve the fixing firmness and avoid falling off during the test.

[0007] Preferably, the bar unit includes a bar strip and sample strip locking pieces respectively arranged on both sides of the bar strip.

[0008] Preferably, the spline locking member includes a spline limiting ring sleeved on the clamping rod strip and a compression spring for providing power to the spline limiting ring.

[0009] Preferably, the spline locking member further includes a nut disposed at the end of the clamping rod strip, and the compression spring is disposed between the spline limiting ring and the nut.

[0010] Preferably, a first friction pattern is provided on the inner side of the vertical plate.

[0011] Preferably, the contact surface between the nut and the vertical plate is an end surface, and a second friction pattern is provided on the end surface.

[0012] A fixture for ultraviolet aging test made according to the above solution not only improves the fixing firmness of the spline by changing the fixing method of the spline, but also greatly increases the ultraviolet irradiation area, so as to realize that multiple splines can be irradiated by ultraviolet rays simultaneously in each test to ensure the accuracy of the test results; the utility model can realize the left and right fixation of the spline by setting the spline locking member, and by setting the nut, not only can the length of the clamping rod strip be adjusted, so that the clamping rod strip can be firmly clamped between the vertical plates to achieve the regulation of the upper and lower positions of the spline, but also a limit is provided for the other end of the compression spring; further, the utility model provides a first friction pattern on the inner side of the vertical plate and a second friction pattern on the outer end surface of the locking cap, and the two friction patterns cooperate with each other to achieve the characteristic of improving the firmness of the telescopic locking member; furthermore, in the utility model, the side part (spline notch position) of the impact spline can also be subjected to ultraviolet irradiation test, which has the advantages of simple structure, reasonable design, capable of increasing the ultraviolet irradiation area, enhancing the fixing firmness of the spline, increasing the number of splines in each test, and also capable of fixing the impact spline. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic structural diagram of the utility model.

[0014] Figure 2 is Figure 1 A partial enlarged view of part A in

[0015] Figure 3 It is a schematic structural diagram of the telescopic locking member of the utility model.

[0016] Figure 4 It is a schematic structural diagram of the locking cap of the utility model.

[0017] Figure 5 It is a schematic structural diagram of the utility model in cooperation with the spline.

[0018] In the figure: 1, flat plate; 2, vertical plate; 3, spline; 4, clamping bar; 5, nut; 6, spline limit ring; 7, compression spring; 8, first friction pattern; 9, second friction pattern. Specific implementation mode

[0019] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention.

[0020] Referring to Figures 1-5 As shown, a fixture for ultraviolet aging test, the fixture includes a bracket body, and a clamping bar unit for fixing a spline is provided on the bracket body; the bracket body includes a flat plate 1 and vertical plates 2 arranged on both sides of the flat plate 1; the clamping bar unit is movably clamped between the vertical plates 1 on both sides for fixing the spline 3 between the clamping bar unit and the flat plate 1. The surface of the flat plate 1 of the present invention is used as the ultraviolet irradiation surface, which maximally improves the ultraviolet irradiation area. At the same time, the clamping bar unit is matched with the vertical plates 1 on both sides to fix the spline, so as to achieve the characteristic of increasing the fixed number of the spline 3; in the present invention, the clamping bar unit is movably clamped between the vertical plates 1 on both sides, which has the characteristic of convenient disassembly; the clamping bar unit can be in traditional forms such as a telescopic rod (manual, electric, pneumatic or hydraulic are all acceptable), aiming to achieve firm clamping and fixing of the spline 3.

[0021] Furthermore, the clamping bar unit includes a clamping bar 4 and spline locking members respectively arranged on both sides of the clamping bar 4. By setting the spline locking members, the spline 3 can be pressed and fixed on the left and right at the same time, so as to achieve the characteristic of fixing the spline 3.

[0022] Furthermore, the spline locking member includes a spline limit ring 6 sleeved on the clamping bar 4 and a compression spring 7 for providing power for the spline limit ring 6. The left and right fixing of the spline 3 is realized by the direct contact between the spline limit rings 6 on both sides and the spline 3 in the middle, and the compression spring 7 provides power for the spline limit ring 6 to realize the clamping and fixing of the spline.

[0023] Furthermore, the spline locking member further includes a nut 5 arranged at the end of the clamping bar 4, and the compression spring 7 is arranged between the spline limit ring 6 and the nut 5. In the present invention, the length of the clamping bar 4 is less than the distance between the vertical plates 2. By setting the nut 5, the length of the clamping bar 4 can be adjusted, so as to achieve the purpose of clamping the clamping bar 4 between the vertical plates 2. When the clamping bar 4 is firmly clamped between the vertical plates 2, the spline 3 can be firmly fixed up and down; further, external threads are provided at both ends of the clamping bar 4, and the internal thread of the nut 5 is adapted to the external thread, so as to achieve the characteristic of convenient adjustment.

[0024] Further, a first friction pattern 8 is provided on the inner side of the vertical plate 2. By providing the first friction pattern 8, the firmness between the vertical plate 2 and the nut 5 can be improved, and the phenomenon of sliding after installation can be avoided.

[0025] Further, the contact surface between the nut 5 and the vertical plate 2 is an end face, and a second friction pattern 9 is provided on the end face. By providing the second friction pattern 9, the firmness between the vertical plate 2 and the nut 5 can be improved, and the phenomenon of sliding after installation can be avoided. Especially when the first friction pattern 8 and the second friction pattern 9 are used together, the effect is better.

[0026] Further, the height of the vertical plate 2 is greater than the width of the spline 3.

[0027] The working principle of the present utility model is as follows: When using the present utility model, the bracket body is placed upright, the spline 3 is placed on the surface of the flat plate 1, with the surface to be irradiated by ultraviolet rays facing upward. Then, the clamping bar unit is placed between the vertical plates 2, and the length of the clamping bar 4 is adjusted by the nut 5, so that the clamping bar 4 is firmly fixed between the vertical plates 2 and presses the spline 3 (this pressing refers to the up-and-down pressing and fixing of the spline 3). After the above pressing, the spline limiting ring 6 is adjusted so that the two spline limiting rings 6 respectively contact both sides of the spline 3. At this time, the compression spring 7 is compressed and deformed between the spline limiting ring 6 and the nut 5, and a spring force is generated on the spline limiting ring 6 to achieve the left-and-right pressing and fixing of the spline 3. When it is necessary to test the impact on the spline 3, the same fixing method can be adopted; it has the advantages of being able to increase the irradiation area of ultraviolet rays, enhance the firmness of spline fixing, increase the number of splines in each test, and also being able to fix the impact spline.

[0028] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A fixture for ultraviolet aging test, characterized in that: The clamp comprises a bracket body, on which a clamping rod unit for fixing the spline is provided; The support body comprises a flat plate (1) and vertical plates (2) arranged on both sides of the flat plate (1); The rod clamping unit is movably clamped between the vertical plates (2) on both sides and is used to fix the spline (3) between the rod clamping unit and the flat plate (1).

2. A fixture for ultraviolet aging test according to claim 1, characterized in that: The stick clamping unit comprises a stick clamping strip (4) and spline locking pieces respectively arranged on both sides of the stick clamping strip (4).

3. A fixture for ultraviolet aging test according to claim 2, characterized in that: The spline locking member comprises a spline limiting ring (6) sleeved on the clamping rod (4) and a compression spring (7) used for providing power to the spline limiting ring (6).

4. A fixture for ultraviolet aging test according to claim 3, characterized in that: The spline locking member also includes a nut (5) arranged at the end of the clamping rod (4). The compression spring (7) is arranged between the spline limiting ring (6) and the nut (5).

5. A fixture for ultraviolet aging test according to claim 1, characterized in that: The inner side of the vertical plate (2) is provided with a first friction pattern (8).

6. A fixture for ultraviolet aging test according to claim 4, characterized in that: The contact surface between the nut (5) and the vertical plate (2) is an end surface, and a second friction pattern (9) is provided on the end surface.

7. A fixture for ultraviolet aging test according to claim 1, characterized in that: The height of the vertical plate (2) is greater than the width of the spline (3).

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