Fatigue testing machine for high-strength flexible lifting belt

Abstract

The utility model provides a fatigue testing machine for a high-strength flexible lifting belt. The fatigue testing machine comprises a base, supports are fixedly connected to the two ends of the base, a cross beam is fixedly connected to the inner sides of the supports, a telescopic air cylinder is movably connected to the upper end of the base, and an adjusting structure is connected between the telescopic air cylinder and the base; a sliding groove is formed in the inner side of the base, a threaded column is rotationally connected into the sliding groove, the outer surface of the threaded column is sleeved with a sliding block, a strip-shaped hole is formed in the outer surface of the base, protruding blocks are fixedly connected to the upper end and the surfaces of the two sides of the sliding block, a movable plate is fixedly connected to the top end of the protruding block at the upper end of the sliding block, and the bottom of the telescopic air cylinder is fixedly connected with the movable plate. The output end of the telescopic air cylinder is fixedly connected with a hook, the lower end of the cross beam is also fixedly connected with a set of hooks, and the number of the bases corresponds to the number of the supports. According to the invention, the problem that oblique stretching cannot be simulated due to the fact that the existing flexible lifting belt is generally stretched up and down or horizontally stretched for detection in a fatigue test is solved.

Description

Technical Field

[0001] This utility model relates to the technical field of fatigue testing equipment for lifting slings, and more specifically, to a fatigue testing machine for high-strength flexible lifting slings. Background Technology

[0002] Flexible lifting slings, as a lightweight and high-strength lifting tool, are widely used in port transportation, construction engineering, aerospace and other fields. Their core performance indicators include load-bearing capacity, wear resistance and fatigue life. Among them, fatigue performance directly determines the reliability of the lifting sling under long-term cyclic loads. If the fatigue performance is insufficient, it may lead to sudden breakage of the lifting sling and cause serious safety accidents. The fatigue testing machine is an experimental device used to test its fatigue performance.

[0003] A search revealed a lifting sling tensile testing device with authorization announcement number CN220188232U. In operation, the lifting sling is passed through the pins of the upper and lower fixed seats respectively, and placed between the pins of the upper and lower fixed seats. The connecting parts of the upper and lower fixed seats are placed between the upper and lower jaws of a conventional tensile testing machine. This allows for safe tensile testing of the lifting sling on a conventional tensile testing machine, yielding accurate and effective data.

[0004] In existing technologies, fatigue tests on flexible lifting slings are typically conducted by vertical or horizontal tension, which cannot simulate the effect of oblique tension. Therefore, we have made improvements and proposed a fatigue testing machine for high-strength flexible lifting slings. Summary of the Invention

[0005] The purpose of this invention is to address the problem that current fatigue tests on flexible lifting slings typically involve vertical or horizontal tensioning, which cannot simulate oblique tensioning.

[0006] To achieve the above-mentioned objectives, this utility model provides the following technical solution:

[0007] A fatigue testing machine for high-strength flexible lifting slings is proposed to improve the above-mentioned problems.

[0008] The application is as follows:

[0009] A fatigue testing machine for high-strength flexible lifting slings includes a base, with supports fixedly connected to both ends of the base, a crossbeam fixedly connected to the inner side of the supports, and a telescopic cylinder movably connected to the upper end of the base. An adjustment structure is connected between the telescopic cylinder and the base.

[0010] The base has a groove on its inner side, and a threaded column is rotatably connected inside the groove. A slider is fitted on the outer surface of the threaded column. The base has a strip-shaped hole on its outer surface. A protrusion is fixedly connected to the upper end and both sides of the slider. A movable plate is fixedly connected to the top of the protrusion at the upper end of the slider. The bottom of the telescopic cylinder is fixedly connected to the movable plate.

[0011] As a preferred technical solution of this application, the output end of the telescopic cylinder is fixedly connected to a hook, and the lower end of the crossbeam is also fixedly connected to a set of hooks. The number of brackets corresponding to each set of the base is two sets, and the two sets of brackets are symmetrically distributed.

[0012] As a preferred technical solution of this application, a servo motor is fixedly connected to one end of the outer surface of the base corresponding to one end of the threaded column, and the servo motor is used to drive the threaded column to rotate.

[0013] As a preferred technical solution of this application, the protrusions are matched with the strip holes, the number of strip holes is equal to the number of protrusions, and their positions correspond one-to-one.

[0014] As a preferred technical solution of this application, the threaded post passes through the slider, and the inner side of the slider matches the surface thread of the threaded post, and the slider and the base are slidably connected.

[0015] As a preferred technical solution of this application, the slider moves back and forth on the threaded column by rotating the threaded column in both directions. The slider has a square structure. The telescopic cylinder moves in the same direction by moving the slider, the protrusion and the adjustment structure.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0017] In the scheme of this application:

[0018] By adjusting the structure, the lifting sling can be subjected to fatigue testing during vertical pulling, and it can also be pulled diagonally to both sides according to the user's needs, thus enabling the simulation of the lifting sling's use to be closer to its actual application. Attached Figure Description

[0019] Figure 1 A schematic diagram of the overall structure of a fatigue testing machine for high-strength flexible lifting slings provided in this application;

[0020] Figure 2 A partial structural schematic diagram of the telescopic cylinder of a fatigue testing machine for a high-strength flexible lifting sling provided in this application;

[0021] Figure 3A partial structural diagram showing the cross-section of the adjustment structure of a fatigue testing machine for a high-strength flexible lifting sling provided in this application;

[0022] Figure 4 This is a partial structural diagram of the adjustment structure of a fatigue testing machine for a high-strength flexible lifting sling provided in this application, cut from another perspective.

[0023] The image shows:

[0024] 1. Base; 2. Bracket; 3. Crossbeam; 4. Telescopic cylinder; 5. Hook; 6. Adjustment structure; 61. Slide groove; 62. Threaded column; 63. Slider; 64. Strip hole; 65. Protrusion; 66. Moving plate; 67. Servo motor. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model.

[0026] Therefore, the following detailed description of the embodiments of this utility model is not intended to limit the scope of the claimed utility model, but merely illustrates some embodiments of the utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model. It should be noted that, unless otherwise specified, the embodiments, features, and technical solutions in the embodiments of this utility model can be combined with each other.

[0027] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0028] like Figure 1-4 As shown, this embodiment proposes a fatigue testing machine for high-strength flexible lifting slings, including a base 1, with brackets 2 fixedly connected to both ends of the base 1, and a crossbeam 3 fixedly connected to the inner side of the brackets 2. A telescopic cylinder 4 is movably connected to the upper end of the base 1, and an adjustment structure 6 is connected between the telescopic cylinder 4 and the base 1. A hook 5 is fixedly connected to the output end of the telescopic cylinder 4, and a set of hooks 5 is also fixedly connected to the lower end of the crossbeam 3. There are two sets of brackets 2 corresponding to one set of base 1, and the two sets of brackets 2 are symmetrically distributed.

[0029] The inner side of the base 1 is provided with a sliding groove 61, and a threaded post 62 is rotatably connected inside the sliding groove 61. A slider 63 is sleeved on the outer surface of the threaded post 62. A strip-shaped hole 64 is provided on the outer surface of the base 1. A protrusion 65 is fixedly connected to the upper end and both sides of the slider 63. A movable plate 66 is fixedly connected to the top of the protrusion 65 at the upper end of the slider 63. The bottom of the telescopic cylinder 4 is fixedly connected to the movable plate 66.

[0030] A servo motor 67 is fixedly connected to one end of the outer surface of the base 1 corresponding to one end of the threaded post 62. The servo motor 67 is used to drive the threaded post 62 to rotate. The protrusion 65 matches the strip hole 64. The number of strip holes 64 is equal to the number of protrusions 65, and their positions correspond one-to-one.

[0031] The threaded post 62 passes through the slider 63, and the inner side of the slider 63 matches the surface thread of the threaded post 62. The slider 63 and the base 1 are slidably connected. The slider 63 moves back and forth on the threaded post 62 by rotating the threaded post 62 in both directions. The slider 63 has a block structure. The telescopic cylinder 4 moves along with the slider 63, the protrusion 65 and the adjustment structure 6.

[0032] In this embodiment, during the fatigue test of the lifting sling by vertical pulling, it can also be pulled diagonally on both sides according to the user's needs, so that the simulation of the use of the lifting sling can be closer to its actual application.

[0033] In summary, the working principle of this utility model is as follows:

[0034] During use, the user can first hook the upper loop of the sling into the upper hook 5, then extend it through the telescopic cylinder 4, then hook the lower loop of the sling into the hook 5 on the telescopic cylinder 4, and then retract the telescopic cylinder 4 to pull the sling downwards through the hook 5, thus completing the sling tension fatigue test. At the same time, multiple sling tension fatigue tests can be performed by extending and pulling the telescopic cylinder 4 again.

[0035] In the process of simulating the lifting of heavy objects by the aforementioned tension lifting sling, the servo motor 67 can drive the threaded column 62 to rotate, so that the slider 63 can move to one side under the rotation of the threaded column 62. This allows the lifting sling under fatigue testing to simulate the effect of lifting heavy objects at an angle, achieving a better simulation effect. In turn, the final fatigue test results are more convincing, and the experimental results are more in line with actual requirements.

[0036] The above embodiments are only used to illustrate the present utility model and are not intended to limit the technical solutions described in the present utility model. Although the present utility model has been described in detail with reference to the above embodiments, the present utility model is not limited to the specific embodiments described above. Therefore, any modifications or equivalent substitutions to the present utility model, and all technical solutions and improvements that do not depart from the spirit and scope of the utility model, are covered within the scope of the claims of the present utility model.

Claims

1. A fatigue testing machine for high-strength flexible lifting slings, comprising a base (1), characterized in that, The base (1) is fixedly connected to two ends of a bracket (2), and a crossbeam (3) is fixedly connected to the inner side of the bracket (2). A telescopic cylinder (4) is movably connected to the upper end of the base (1), and an adjustment structure (6) is connected between the telescopic cylinder (4) and the base (1). The base (1) has a groove (61) on its inner side. A threaded column (62) is rotatably connected inside the groove (61). A slider (63) is sleeved on the outer surface of the threaded column (62). A strip hole (64) is opened on the outer surface of the base (1). A protrusion (65) is fixedly connected to the upper end and both sides of the slider (63). A movable plate (66) is fixedly connected to the top of the protrusion (65) at the upper end of the slider (63). The bottom of the telescopic cylinder (4) is fixedly connected to the movable plate (66).

2. The fatigue testing machine for high-strength flexible lifting slings according to claim 1, characterized in that, The output end of the telescopic cylinder (4) is fixedly connected to a hook (5), and the lower end of the crossbeam (3) is also fixedly connected to a set of hooks (5). The number of the base (1) corresponding to the bracket (2) is two sets, and the two sets of brackets (2) are symmetrically distributed.

3. The fatigue testing machine for high-strength flexible lifting slings according to claim 1, characterized in that, A servo motor (67) is fixedly connected to one end of the outer surface of the base (1) corresponding to one end of the threaded post (62). The servo motor (67) is used to drive the threaded post (62) to rotate.

4. A fatigue testing machine for high-strength flexible lifting slings according to claim 3, characterized in that, The bumps (65) are matched with the strip holes (64), the number of strip holes (64) is equal to the number of bumps (65), and their positions correspond one-to-one.

5. A fatigue testing machine for high-strength flexible lifting slings according to claim 4, characterized in that, The threaded post (62) passes through the slider (63), and the inner side of the slider (63) matches the surface thread of the threaded post (62). The slider (63) and the base (1) are slidably connected.

6. A fatigue testing machine for high-strength flexible lifting slings according to claim 1, characterized in that, The slider (63) moves back and forth on the threaded column (62) by rotating forward and backward. The slider (63) is a block structure. The telescopic cylinder (4) moves in the same direction by moving the slider (63), the protrusion (65) together with the adjustment structure (6).

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