Fastener tensile resistance detection device

Abstract

The utility model relates to the technical field of detection devices, in particular to a fastener tensile resistance detection device which comprises a supporting frame, a limiting hole is formed in one end of the supporting frame, a limiting rod is arranged in the limiting hole, one end of the limiting rod is fixedly connected with a limiting frame, and the upper end of the limiting frame is slidably connected with a first connecting frame. The top end of the first connecting frame is fixedly connected with a first air cylinder which is fixedly connected with the supporting frame, the middle of the limiting frame is placed on a screw head, the lower end of the screw head is fixedly connected with a screw rod, the lower end of the screw rod is in threaded connection with a connecting column, the outer wall of the connecting column is in threaded connection with a connecting plate, and the lower end of the connecting plate is fixedly connected with a second connecting frame. A second air cylinder is fixedly connected to the bottom end of the second connecting frame and fixedly connected with the supporting frame. Compared with the prior art, the positions of the screw head and the screw rod are stable, the screw head and the screw rod are not easy to move, and the accuracy of a detection result can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of detection devices, in particular to a fastener anti-tensile detection device. Background Art

[0002] Fasteners are a type of mechanical parts used for fastening connections and are extremely widely used. They are the general term for a type of mechanical parts used to fasten two or more parts (or components) into a whole. Fasteners are characterized by a wide variety of varieties and specifications, different performance and uses, and a high degree of standardization, serialization, and generalization.

[0003] In the prior art, a Chinese patent with publication number CN217331958U proposes a tensile testing device for aerospace fasteners. By coordinating the use of a guide rod, a fixing plate, a hydraulic cylinder and a hydraulic rod, a guide function can be provided for the movement of the first clamp while the fastener is subjected to a tensile test, thereby effectively enhancing the stability of the tensile testing device and thereby improving the accuracy of the test results. However, in actual applications, there are still problems such as the small contact area when using a splint to fix circular fasteners such as bolts and screws, and the small friction between the splint and the test part, which easily leads to relative displacement between the splint and the test part, thus affecting the test results of the part. Therefore, we disclose a fastener tensile testing device. Utility Model Content

[0004] In view of this, the purpose of the present invention is to provide a fastener tensile testing device to solve the problem of relative displacement between the splint and the test part, which affects the test results of the part.

[0005] Based on the above-mentioned purpose, the utility model provides a fastener tensile testing device, including a support frame, a limiting hole is opened at one end of the support frame, a limiting rod is arranged in the limiting hole, one end of the limiting rod is fixedly connected to the limiting frame, the upper end of the limiting frame is slidably connected to the first connecting frame, the top end of the first connecting frame is fixedly connected to the first cylinder, the first cylinder is fixedly connected to the support frame, the output end of the first cylinder is fixedly connected to the first connecting frame, the middle of the limiting frame is placed on the screw head, the lower end of the screw head is fixedly connected to the screw, the lower end of the screw is threadedly connected to the connecting column, the outer wall of the connecting column is threadedly connected to the connecting plate, the lower end of the connecting plate is fixedly connected to the second connecting frame, the bottom end of the second connecting frame is fixedly connected to the second cylinder, and the output end of the top end of the second cylinder is fixedly connected to the support frame.

[0006] Preferably, a limiting clamp is provided between the limiting frame and the screw head, the limiting clamp comprises two arc-shaped plates, a torsion spring is fixedly connected between the two arc-shaped plates, the limiting clamp is movably engaged with the screw rod, the length of the limiting clamp is greater than the length of the limiting frame, and the length of the limiting clamp is greater than the diameter of the screw head.

[0007] Preferably, the limiting rod is a T-shaped rod, the limiting frame includes four square columns and a square plate, the two square columns at the upper end of the limiting frame are slidably connected to the first connecting frame, and the two square columns at the lower end of the limiting frame are slidably engaged with the screw head.

[0008] Preferably, the two square columns at the lower end of the limiting frame are rotatably connected to connecting rods, and the two connecting rods are movably engaged with the two square columns at the upper end of the limiting frame respectively.

[0009] Preferably, the connecting column includes a cylinder at the upper end and a rotating plate at the lower end. The diameter of the rotating plate at the lower end of the connecting column is larger than the diameter of the cylinder at the upper end of the connecting column. The outer wall of the rotating plate at the lower end of the connecting column is fixedly connected with an anti-slip edge.

[0010] Preferably, two limiting columns are fixedly connected to the bottom end of the support frame, and the limiting columns are movably connected to the second connecting frame.

[0011] The beneficial effects of the utility model are as follows: the first connecting frame is driven to be lifted and lowered by the first cylinder, so that the first cylinder drives the limiting frame to be lifted and lowered through the first connecting frame, and the second connecting frame and the connecting plate are driven to move by the second cylinder, so that the connecting plate fixes the position of the screw rod through the connecting column, so that when the second cylinder and the first cylinder move relative to each other, the screw head and the screw rod are stretched, and the position of the screw head and the screw rod is relatively stable and not easy to move, which is conducive to improving the accuracy of the detection result, and when in use, the connecting column can be replaced according to the size of the fastener to be detected, thereby improving practicality;

[0012] The limit frame lifts the screw head through the limit clamp, avoiding the problem of unstable connection and inaccurate detection results caused by the small contact area between the limit frame and the screw head. The limit clamp can be adapted to fasteners of various specifications and has good practicality. The limit clamp improves the relative position stability of the screw, the screw head and the limit frame, avoiding the connection between the limit frame and the screw head from falling off during stretching, so that the device can be adapted to fasteners of various specifications and the connection with the fasteners is also relatively stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only for the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0014] Figure 1 This is a schematic diagram of an embodiment of the utility model;

[0015] Figure 2 This is a partially cutaway three-dimensional structural diagram of the connecting plate of the present invention;

[0016] Figure 3 This is a schematic diagram of the three-dimensional structure of the connection between the screw and the limiting clamp of the utility model.

[0017] The following are marked in the figure:

[0018] 1. Support frame; 2. Limit hole; 3. Limit rod; 4. Limit frame; 5. First connecting frame; 6. First cylinder; 7. Connecting rod; 8. Screw; 9. Screw head; 10. Limit clamp; 11. Torsion spring; 12. Connecting column; 13. Connecting plate; 14. Second connecting frame; 15. Second cylinder. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments.

[0020] It should be noted that, unless otherwise defined, the technical or scientific terms used in this utility model should have the usual meanings understood by people with ordinary skills in the field to which this utility model belongs. The "first", "second" and similar words used in this utility model do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative position relationships. When the absolute position of the object being described changes, the relative position relationship may also change accordingly.

[0021] like Figure 1-Figure 3As shown, a fastener tensile testing device includes a support frame 1, a limiting hole 2 is provided at one end of the support frame 1, a limiting rod 3 is arranged in the limiting hole 2, one end of the limiting rod 3 is fixedly connected to the limiting frame 4, the upper end of the limiting frame 4 is slidably connected to the first connecting frame 5, the top of the first connecting frame 5 is fixedly connected to the first cylinder 6, the first cylinder 6 is fixedly connected to the support frame 1, the output end of the first cylinder 6 is fixedly connected to the first connecting frame 5, the middle part of the limiting frame 4 is placed on the screw head 9, the lower end of the screw head 9 is fixedly connected to the screw rod 8, the lower end of the screw rod 8 is threadedly connected to the connecting column 12, the outer wall of the connecting column 12 is threadedly connected to the connecting plate 13, the lower end of the connecting plate 13 is fixedly connected to the second connecting frame 14, and the bottom end of the second connecting frame 14 is fixedly connected to the second cylinder 1 5. The output end of the top of the second cylinder 15 is fixedly connected to the support frame 1. The limit rod 3 is a T-shaped rod. The limit frame 4 includes four square columns and a square plate. The two square columns at the upper end of the limit frame 4 are slidably connected to the first connecting frame 5. The two square columns at the lower end of the limit frame 4 are slidably engaged with the screw head 9. The two square columns at the lower end of the limit frame 4 are rotatably connected to the connecting rod 7. The two connecting rods 7 are movably engaged with the two square columns at the upper end of the limit frame 4 respectively. The connecting column 12 includes a cylinder at the upper end and a rotating plate at the lower end. The diameter of the rotating plate at the lower end of the connecting column 12 is greater than the diameter of the cylinder at the upper end of the connecting column 12. The outer wall of the rotating plate at the lower end of the connecting column 12 is fixedly connected with an anti-slip ridge. The bottom end of the support frame 1 is fixedly connected to two limit columns, which are movably sleeved with the second connecting frame 14. When in use, the support A limiting hole 2 is provided at one end of the frame 1, and a limiting rod 3 is provided in the limiting hole 2. One end of the limiting rod 3 is fixedly connected to the limiting frame 4, so that the support frame 1 limits the moving position of the limiting rod 3 and the limiting frame 4 through the limiting hole 2 to prevent the limiting frame 4 from falling. A first connecting frame 5 is slidably connected to the upper end of the limiting frame 4, and a first cylinder 6 is fixedly connected to the top of the first connecting frame 5. The first cylinder 6 is fixedly connected to the support frame 1, so that the support frame 1 limits the position of the first cylinder 6, so that the first cylinder 6 can drive the first connecting frame 5 to move up and down, so that the first cylinder 6 can drive the limiting frame 4 to move up and down through the first connecting frame 5. A screw head 9 is placed on the middle part of the limiting frame 4, and a screw rod 8 is fixedly connected to the lower end of the screw rod 8, and a connecting column 1 is threadedly connected to the lower end of the screw rod 8. 2. The outer wall of the connecting column 12 is threadedly connected with a connecting plate 13. The lower end of the connecting plate 13 is fixedly connected to a second connecting frame 14. The bottom end of the second connecting frame 14 is fixedly connected to a second cylinder 15. The second cylinder 15 is fixedly connected to the support frame 1, so that the support frame 1 fixes the position of the second cylinder 15, so that the second cylinder 15 can drive the second connecting frame 14 and the connecting plate 13 to move, so that the connecting plate 13 fixes the position of the screw rod 8 through the connecting column 12, so that when the second cylinder 15 and the first cylinder 6 move relative to each other, when the screw head 9 and the screw rod 8 are stretched, the position of the screw head 9 and the screw rod 8 is relatively stable and not easy to move, which is conducive to improving the accuracy of the detection result. In addition, when in use, the connecting column 12 can be replaced according to the size of the fastener to be detected, thereby improving practicality.The limiting rod 3 is a T-shaped rod, so that the connection between the limiting rod 3 and the support frame 1 will not be disconnected. The limiting frame 4 includes four square columns and a square plate. The two square columns at the upper end of the limiting frame 4 are slidably connected to the first connecting frame 5, and the two square columns at the lower end of the limiting frame 4 are slidably engaged with the screw head 9, so that the connection between the first connecting frame 5 and the limiting frame 4 is stable. When the limiting frame 4 can be driven by the first connecting frame 5 to move upward, it will drive the screw head 9 to move upward together. The two square columns at the lower end of the limiting frame 4 are rotatably connected to the connecting rod 7, and the two connecting rods 7 are respectively engaged with the two square columns at the upper end of the limiting frame 4. The connection makes the square columns at the upper and lower ends of the limit frame 4 relatively more stable, improving the detection accuracy of the device. The connecting column 12 includes a cylinder at the upper end and a rotating plate at the lower end. The diameter of the rotating plate at the lower end of the connecting column 12 is larger than the diameter of the cylinder at the upper end of the connecting column 12. The outer wall of the rotating plate at the lower end of the connecting column 12 is fixedly connected with an anti-slip edge, so that the connecting column 12 can limit the position of the screw 8, and also makes the connecting column 12 convenient to use. Two limit columns are fixedly connected to the bottom end of the support frame 1. The limit columns are movably connected to the second connecting frame 14, so that the second connecting frame 14 is relatively stable when moving.

[0022] As a preferred implementation in this embodiment, Figure 2 and Figure 3 As shown, a limiting clamp 10 is provided between the limiting frame 4 and the screw head 9, and the limiting clamp 10 includes two arc-shaped plates, and a torsion spring 11 is fixedly connected between the two arc-shaped plates. The limiting clamp 10 is movably connected to the screw rod 8, and the length of the limiting clamp 10 is greater than the length of the limiting frame 4, and the length of the limiting clamp 10 is greater than the diameter of the screw head 9. By providing a limiting clamp 10 between the limiting frame 4 and the screw head 9, the limiting clamp 10 includes two arc-shaped plates, and a torsion spring 11 is fixedly connected between the two arc-shaped plates, so that the limiting frame 4 pulls the screw head 9 through the limiting clamp 10 to avoid the limiting frame 4 and the screw head 9 The problem of unstable connection and inaccurate detection results caused by too small contact area is solved, and the limit clamp 10 can be adapted to fasteners of various specifications, and has good practicality. The limit clamp 10 is movably connected with the screw 8, and the length of the limit clamp 10 is greater than the length of the limit frame 4, and the length of the limit clamp 10 is greater than the diameter of the screw head 9, so that the limit clamp 10 can improve the relative position stability of the screw 8 and the screw head 9 and the limit frame 4, and avoid the connection between the limit frame 4 and the screw head 9 falling off during stretching, so that the device can be adapted to fasteners of various specifications, and the connection with the fasteners is also relatively stable.

[0023] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples. Within the scope of the present invention, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity.

[0024] The present invention is intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of protection of the present invention.

Claims

1. A fastener tensile testing device, comprising a support frame (1), characterized in that: A limiting hole (2) is provided at one end of the support frame (1), a limiting rod (3) is provided in the limiting hole (2), one end of the limiting rod (3) is fixedly connected to the limiting frame (4), the upper end of the limiting frame (4) is slidably connected to a first connecting frame (5), the top end of the first connecting frame (5) is fixedly connected to a first cylinder (6), the first cylinder (6) is fixedly connected to the support frame (1), the output end of the first cylinder (6) is fixedly connected to the first connecting frame (5), and the limiting The middle part of the frame (4) is placed on the screw head (9), the lower end of the screw head (9) is fixedly connected to the screw rod (8), the lower end of the screw rod (8) is threadedly connected to the connecting column (12), the outer wall of the connecting column (12) is threadedly connected to the connecting plate (13), the lower end of the connecting plate (13) is fixedly connected to the second connecting frame (14), the bottom end of the second connecting frame (14) is fixedly connected to the second cylinder (15), and the output end of the top end of the second cylinder (15) is fixedly connected to the support frame (1).

2. The fastener tensile testing device according to claim 1, characterized in that: A limiting clamp (10) is provided between the limiting frame (4) and the screw head (9), the limiting clamp (10) comprising two arc-shaped plates, a torsion spring (11) being fixedly connected between the two arc-shaped plates, the limiting clamp (10) being movably engaged with the screw rod (8), the length of the limiting clamp (10) being greater than the length of the limiting frame (4), and the length of the limiting clamp (10) being greater than the diameter of the screw head (9).

3. The fastener tensile testing device according to claim 1, characterized in that: The limiting rod (3) is a T-shaped rod, and the limiting frame (4) includes four square columns and a square plate. The two square columns at the upper end of the limiting frame (4) are slidably connected to the first connecting frame (5), and the two square columns at the lower end of the limiting frame (4) are slidably engaged with the screw head (9).

4. The fastener tensile testing device according to claim 3, characterized in that: The two square columns at the lower end of the limiting frame (4) are both rotatably connected to a connecting rod (7), and the two connecting rods (7) are movably engaged with the two square columns at the upper end of the limiting frame (4).

5. The fastener tensile testing device according to claim 1, characterized in that: The connecting column (12) comprises a cylinder at the upper end and a rotating plate at the lower end; the diameter of the rotating plate at the lower end of the connecting column (12) is greater than the diameter of the cylinder at the upper end of the connecting column (12); and the outer wall of the rotating plate at the lower end of the connecting column (12) is fixedly connected with an anti-slip edge.

6. The fastener tensile testing device according to claim 1, characterized in that: The bottom end of the support frame (1) is fixedly connected to two limiting columns, and the limiting columns are movably sleeved with the second connecting frame (14).

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