Tension fatigue clamp suitable for round-link chain samples of different specifications

Abstract

The utility model relates to the field of sample clamps, and discloses a tension fatigue clamp suitable for round-link chain samples of different specifications, which comprises a protective shell and a chain ring I. The front end of the protective shell is provided with a protective plate, the front end of the protective plate is provided with a grip, and the inner wall of the protective shell is provided with a fixing assembly. A threaded hole is formed in the top end of the protective shell, the fixing assembly comprises a supporting plate, the supporting plate is installed on the inner wall of the protective shell, a left baffle is installed at the front end of the supporting plate, a fixing groove is formed in the front end of the left baffle, a pulling plate is inserted into the inner wall of the fixing groove, and the outer wall of the pulling plate is sleeved with the first chain ring. A fixing plate is installed at the front end of the left baffle. According to the circular chain ring fatigue clamp, the tension fatigue test can be carried out on circular chain samples of different specifications by replacing part of parts, and meanwhile, the whole device is simple in structure, low in cost and high in safety, so that the production and manufacturing cost of the circular chain ring fatigue clamp is reduced.

Description

Technical Field

[0001] The utility model relates to the field of sample clamps, in particular to a tensile fatigue clamp suitable for round link chain samples of different specifications. Background Art

[0002] A fatigue fixture is a tool specifically designed to hold test specimens and apply fatigue loads to them. It is widely used in aerospace, automotive, mechanical manufacturing, power electronics, and other fields, and is an indispensable tool for evaluating the fatigue properties of materials. As a type of fatigue fixture, the round link chain fatigue fixture is primarily used to secure round link chain specimens to prevent them from shifting during loading. It can also accommodate fatigue tests on round link chain specimens of varying shapes and sizes. Therefore, the design of the round link chain fatigue fixture is critical and generally requires comprehensive consideration of multiple factors, including test requirements, test environment, test equipment, and the characteristics of the test materials. Traditional round link chain fatigue fixtures have poor stability and a complex structure. Furthermore, different sizes of round link chain specimens require different fatigue fixtures, resulting in high costs.

[0003] After searching, China Patent Publication No.: China Patent Publication No. CN212585959U discloses a special test fixture for high-strength round link chains for mining, which fixes the round link chain through two clamping blocks and semi-circular ring pins matching the clamping grooves, thereby conducting tensile tests on it. For example, China Patent Publication No. CN220188242U discloses a round link chain breaking test device, which realizes the breaking test of the round link chain and greatly improves the safety.

[0004] The fixture designs of both methods take multiple factors into consideration and the round link chain fixture has been improved to a certain extent. However, the designed fatigue fixture structure is relatively complex, the production cost is high and it has certain limitations. Therefore, a tensile fatigue fixture suitable for round link chain specimens of different specifications is proposed to solve the above problems. Utility Model Content

[0005] In order to make up for the above shortcomings, the utility model provides a tensile fatigue fixture suitable for round link chain specimens of different specifications, aiming to improve the problem in the prior art that "the existing fatigue fixture structure is too complex, the production cost is high and has certain limitations".

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solutions: a tensile fatigue fixture suitable for round link chain specimens of different specifications, comprising a protective shell and a chain link, a protective plate is installed at the front end of the protective shell, a handle is installed at the front end of the protective plate, a fixing assembly is provided on the inner wall of the protective shell, a threaded hole is provided on the top of the protective shell, the fixing assembly comprises a support plate, the support plate is installed on the inner wall of the protective shell, a left baffle is installed at the front end of the support plate, a fixing groove is provided at the front end of the left baffle, a pull plate is inserted into the inner wall of the fixing groove, the chain link is sleeved on the outer wall of the pull plate, and a fixing plate is installed at the front end of the left baffle.

[0007] As a further description of the above technical solution:

[0008] The left baffle is arranged in a concave shape, and an arc groove is arranged at the bottom end of the left baffle.

[0009] As a further description of the above technical solution:

[0010] The fixing plate is configured to be in a convex shape, and the protruding portion of the fixing plate is adapted to the fixing groove.

[0011] As a further description of the above technical solution:

[0012] The top end of the pull plate is arranged in an arc shape, and a positioning groove is arranged on the top end of the pull plate.

[0013] As a further description of the above technical solution:

[0014] The front end of the support plate is provided with a guide groove, and the chain link 1 is inserted into the inner wall of the guide groove.

[0015] As a further description of the above technical solution:

[0016] A right baffle is installed at the front end of the support plate near the left end, and the right baffle and the left baffle are mirror-image components with the same appearance.

[0017] As a further description of the above technical solution:

[0018] An indicator mark is provided at the front end of the left baffle.

[0019] As a further description of the above technical solution:

[0020] There are multiple groups of indicator marks, and the multiple groups of indicator marks are respectively arranged at the front ends of the pull plate, the fixed plate, and the right baffle.

[0021] The utility model has the following beneficial effects:

[0022] 1. In the present invention, by replacing some parts, it is possible to carry out tensile fatigue tests on round link chain specimens of different specifications. At the same time, the overall device has a simple structure, low cost and high safety, thereby reducing the production cost of the round chain link fatigue fixture and expanding the scope of use of the fatigue fixture. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the three-dimensional structure of the overall device in the utility model;

[0024] Figure 2 This is a schematic diagram of the three-dimensional structure of the fixed component in the present utility model;

[0025] Figure 3 This is a schematic diagram of the three-dimensional structure of the overall device in Example 2 of the present utility model;

[0026] Figure 4 This is a schematic diagram of the disassembled three-dimensional structure of the fixing component in Example 2 of the present utility model.

[0027] Legend:

[0028] 1. Protective shell; 2. Protective plate; 3. Grip; 4. Threaded hole; 5. Fixing assembly; 51. Support plate; 52. Left baffle; 53. Pull plate; 54. Fixing plate; 55. Right baffle; 56. Indicator mark; 57. Fixing groove; 58. Arc groove; 59. Positioning groove; 510. Guide groove; 6. Chain link 1; 7. Chain link 2. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] Example 1:

[0031] Reference Figure 1 、 Figure 2The utility model provides an embodiment: a tensile fatigue fixture suitable for round link chain specimens of different specifications, including a protective shell 1 for supporting the entire device and a chain link 6 to be tested, a protective plate 2 for closing the front opening of the protective shell 1 is installed at the front end of the protective shell 1, a handle 3 for facilitating the operator to move the protective plate 2 is installed at the front end of the protective plate 2, a fixing component 5 for fixing the chain link 6 is provided on the inner wall of the protective shell 1, and a threaded hole 4 for connecting the protective shell 1 and the electro-hydraulic servo fatigue testing machine is provided at the top of the protective shell 1. The fatigue testing machine is an existing technology and can be implemented by people in this field, so no further description will be given in this case. The fixing component 5 includes a support plate 51, which is installed on the inner wall of the protective shell 1. The front end of the support plate 51 is installed with a left baffle 52 for supporting the pull plate 53. The front end of the left baffle 52 is provided with a fixing groove 57 for accommodating the pull plate 53. The inner wall of the fixing groove 57 is plugged with a pull plate 53 for fixing the chain link 6. The chain link 6 is sleeved on the outer wall of the pull plate 53. The front end of the left baffle 52 is installed with a fixing plate 54 for fixing the left and right positions of the pull plate 53.

[0032] Reference Figure 1 、 Figure 2 The left baffle 52 is set to a concave shape, and the bottom end of the left baffle 52 is provided with an arc-shaped groove 58 for accommodating the chain ring 6. The fixing plate 54 is set to a convex shape, and the protruding part of the fixing plate 54 is adapted to the fixing groove 57. When the fixing plate 54 is installed at the front end of the left baffle 52, the protruding part of the fixing plate 54 will be completely inserted into the interior of the fixing groove 57, thereby limiting the left and right movement of the pull plate 53. The top of the pull plate 53 is set to an arc shape, and the top of the pull plate 53 is set to an arc shape so that it can better fit the inner wall of the chain ring 6. The top of the pull plate 53 is provided with a positioning groove 59 for preventing the chain ring 6 from moving left and right. When the chain ring 6 is tightened, the chain ring 6 will be stuck in the interior of the positioning groove 59, thereby preventing the chain from moving left and right. Ring 16 can swing left and right at will, and the front end of the support plate 51 is provided with a guide groove 510 for limiting the fixed state of chain ring 16. Chain ring 16 is inserted into the inner wall of the guide groove 510. By using the guide groove 510 to limit chain ring 16, it can be kept in a vertical state during the test. The front end of the support plate 51 is installed with a right baffle 55 near the left end for fixing the other end of the pull plate 53. The right baffle 55 and the left baffle 52 are mirror-image components with the same appearance. The front end of the left baffle 52 is provided with an indicator mark 56 for facilitating the operator to distinguish different models of fixed components 5. There are multiple groups of indicator marks 56, and the multiple groups of indicator marks 56 are respectively arranged at the front ends of the pull plate 53, the fixed plate 54 and the right baffle 55.

[0033] Example 2:

[0034] Reference Figure 3 、 Figure 4The difference between Example 2 of the present invention and Example 1 is that in Example 2, chain link 1 6 is replaced by chain link 2 7, and the appearance of the left baffle 52, right baffle 55, fixing groove 57, pull plate 53, and fixing plate 54 in the fixing assembly 5 are different from those in Example 1, and the positioning groove 59 is removed.

[0035] The diameter of chain link 1 6 is 38 mm, and the diameter of chain link 2 7 is 26 mm. In embodiment 2, the fixing groove 57 directly passes through the bottom end of the left baffle 52, and the fixing plate 54 is set to be L-shaped. The fixing plate 54 is still adapted to the fixing groove 57, and the arc surface at the top of the pull plate 53 can just fit with the inner wall of chain link 2 7.

[0036] Working principle: When testing is required, the chain link 6 can be first sleeved on the outer wall of the pull plate 53, and then the pull plate 53 can be inserted into the inside of the fixed groove 57 and the chain link 6 can be guided to insert into the inside of the guide groove 510 and the positioning groove 59. At this time, the fixed plate 54 will block the two ends of the pull plate 53 to prevent the pull plate 53 from shaking left and right. Then the protective plate 2 can be installed on the front end of the protective shell 1 to close its front end. Then the protective shell 1 and the electro-hydraulic servo fatigue testing machine can be connected through the threaded hole 4 to start testing.

[0037] When chain links of different sizes need to be tested, different types of left baffles 52, fixed plates 54, and right baffles 55 can be replaced to adapt to pull plates 53 of different shapes. Pull plates 53 of different shapes can be adapted to chain links of different sizes.

[0038] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A tensile fatigue fixture suitable for round link chain specimens of different specifications, comprising a protective shell (1) and a chain link (6), characterized in that: The front end of the protective shell (1) is equipped with a protective plate (2), the front end of the protective plate (2) is equipped with a handle (3), the inner wall of the protective shell (1) is equipped with a fixing assembly (5), the top of the protective shell (1) is equipped with a threaded hole (4), the fixing assembly (5) includes a support plate (51), the support plate (51) is equipped with the inner wall of the protective shell (1), the front end of the support plate (51) is equipped with a left baffle (52), the front end of the left baffle (52) is equipped with a fixing groove (57), the inner wall of the fixing groove (57) is connected with a pull plate (53), the chain link (6) is sleeved on the outer wall of the pull plate (53), and the front end of the left baffle (52) is equipped with a fixing plate (54).

2. A tensile fatigue fixture suitable for round link chain specimens of different specifications according to claim 1, characterized in that: The left baffle (52) is configured to be concave in shape, and an arc-shaped groove (58) is provided at the bottom end of the left baffle (52).

3. The tensile fatigue fixture suitable for round link chain specimens of different specifications according to claim 1, characterized in that: The fixing plate (54) is configured in a convex shape, and the protruding portion of the fixing plate (54) is adapted to the fixing groove (57).

4. The tensile fatigue fixture suitable for round link chain specimens of different specifications according to claim 1, characterized in that: The top end of the pull plate (53) is arranged in an arc shape, and a positioning groove (59) is provided at the top end of the pull plate (53).

5. The tensile fatigue fixture suitable for round link chain specimens of different specifications according to claim 1, characterized in that: The front end of the support plate (51) is provided with a guide groove (510), and the chain link 1 (6) is inserted into the inner wall of the guide groove (510).

6. The tensile fatigue fixture suitable for round link chain specimens of different specifications according to claim 1, characterized in that: A right baffle (55) is installed at the front end of the support plate (51) near the left end. The right baffle (55) and the left baffle (52) are mirror-image components with the same appearance.

7. The tensile fatigue fixture suitable for round link chain specimens of different specifications according to claim 1, characterized in that: The front end of the left baffle (52) is provided with an indication mark (56).

8. The tensile fatigue fixture suitable for round link chain specimens of different specifications according to claim 7, characterized in that: The indicator marks (56) are provided in multiple groups, and the multiple groups of indicator marks (56) are respectively provided at the front ends of the pull plate (53), the fixed plate (54), and the right baffle (55).

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