A shackle to prevent shaft reversal

Abstract

This utility model relates to a shackle that prevents shaft reversal. It includes a shackle body, comprising a shackle top, a shackle body, and a ring eye. A threaded pin is screwed into the ring eye. A shoulder is integrally formed on the threaded pin, abutting against the outer end face of the ring eye. A limiting notch is formed on the shoulder. A groove is formed on the end face of the ring eye located on the side of the limiting notch. A limiting block is slidably connected within the groove. The free end of the limiting block is located within the corresponding limiting notch. Due to the cooperation between the limiting block and the limiting notch, the shoulder of the threaded pin is rotationally limited by the limiting block, preventing the threaded pin from reversing during use. This improves the safety of the shackle during production and use. This device is suitable for industrial production and has strong practicality.

Description

Technical Field

[0001] This utility model belongs to the technical field of cutting machine tools, and in particular relates to a shackle for preventing shaft reversal. Background Technology

[0002] A patent titled "A Removable Shackle" (application number CN202020020090.1) is disclosed in the existing Chinese patent database. This removable shackle includes a hook, with insertion holes on both its left and right sides. A steel pipe is welded to the left side of the hook, and a movable cavity is formed inside the steel pipe. A pin is movably installed inside the movable cavity. A limiting plate is fixedly connected inside the movable cavity to the left of the pin, and a connecting ring is fixedly connected inside the movable cavity to the left of the limiting plate. This removable shackle, with its steel pipe, movable cavity, pin, limiting plate, connecting ring, and telescopic spring on the left side of the hook, facilitates the left-right movement of the pin, limiting plate, and connecting ring within the movable cavity by the elastic force of the telescopic spring. The insertion holes inside the hook are adapted to the pin, allowing the pin to be quickly inserted into the insertion holes by the elastic force of the telescopic spring, and ensuring that the pin will not loosen during use.

[0003] In existing shackles, the threaded pin is screwed to the eye. During long-term use, the threaded pin may reverse under stress, which could cause the shackle to fall off and lead to a safety accident. Therefore, this paper aims to propose a shackle that prevents the threaded pin from reversing under stress by limiting the reversal of the threaded pin, thus preventing the threaded pin from falling off the shackle body. Utility Model Content

[0004] The technical problem to be solved by this utility model is how to improve the safety of shackles during use. In order to overcome its shortcomings, this utility model provides a shackle that prevents shaft reversal.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution:

[0006] A shackle for preventing shaft reversal includes a shackle body, which includes a shackle top, a shackle body, and a ring eye. A threaded pin is screwed into the ring eye, and a shoulder is integrally provided on the threaded pin. The shoulder abuts against the outer end face of the ring eye, and a limit notch is provided on the shoulder. A groove is provided on the end face of the ring eye located on the side of the limit notch. A limit block is slidably connected in the groove, and the free end of the limit block is located in the corresponding limit notch.

[0007] Compared with the prior art, the beneficial effects of this utility model are: due to the cooperative setting of the limiting block and the limiting notch, the shoulder of the threaded pin is rotated and limited by the limiting block, which avoids the reverse rotation of the threaded pin during use, thereby improving the safety of the shackle in the production and use process. This device is suitable for industrial production and has strong practicality.

[0008] As a preferred embodiment, a horizontal compression spring is provided in the groove, and a convex shaft is provided on the end face of the limiting block located in the groove. One end of the compression spring is sleeved on the convex shaft, and the other end is fixedly disposed to the inner wall of the groove.

[0009] As a preferred embodiment, the limiting block includes a slider portion disposed within a groove, a locking portion integrally disposed on the outer surface of the slider portion, a convex shaft integrally disposed on the end face of the slider portion, and the inner free end of the locking portion disposed within a limiting notch.

[0010] As a preferred embodiment, the outer free end of the locking block is integrally provided with a vertical plate section, and the vertical plate section and the locking block form an L-shaped structure. A limiting bolt is screwed into the vertical plate section. When the limiting locking block slides outward and disengages from the limiting notch, the free end of the limiting bolt abuts against the outer peripheral surface of the annular eye.

[0011] As a preferred embodiment, a rotating part is integrally provided at the free end of the threaded pin on one side of the shoulder. The rotating part is arranged perpendicular to the shoulder, and the inner hole of the rotating part is arranged perpendicular to the axis of the threaded pin. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model.

[0013] Figure 2 This is a side view of the structure of the present invention in use.

[0014] Figure 3 for Figure 2 A magnified view of a portion of point A in the middle.

[0015] Figure 4 This is a side view of the structure of the present invention when the shackle needs to be disassembled.

[0016] Figure 5 for Figure 4 A magnified view of a section at point B in the middle.

[0017] In the diagram: 1 Shackle body, 101 Shackle top, 102 Shackle body, 103 Ring eye, 2 Threaded pin, 3 Shoulder, 4 Limiting notch, 5 Groove, 6 Limiting block, 601 Slider part, 602 Block part, 603 Vertical plate section, 7 Compression spring, 8 Protruding shaft, 9 Limiting bolt, 10 Rotating part. Detailed Implementation

[0018] The technical solution of this application will be further described below with reference to the accompanying drawings and embodiments.

[0019] like Figure 1-5 As shown, this is a shackle designed to prevent shaft reversal. It includes a shackle body 1, which comprises a shackle top 101, a shackle body 102, and a ring eye 103. A threaded pin 2 is screwed into the ring eye 103. A shoulder 3 is integrally formed on the threaded pin 2, abutting against the outer end face of the ring eye 103. A limiting notch 4 is formed on the shoulder 3. A groove 5 is formed on the end face of the ring eye 103 located on the side of the limiting notch 4. A limiting block 6 is slidably connected within the groove 5, with its free end positioned within the corresponding limiting notch 4. A horizontal compression spring 7 is installed within the groove 5. A protruding shaft 8 is provided on the end face of the limiting block 6 within the groove 5. One end of the compression spring 7 is sleeved on the protruding shaft 8, and the other end is fixed to the inner wall of the groove 5. The limiting block 6 includes a slider portion 601 located within the groove 5. A locking portion 602 is integrally formed on the outer surface of the slider portion 601. A convex shaft 8 is integrally formed on the end face of the slider portion 601. The inner free end of the locking portion 602 is located within the limiting notch 4. A vertical plate section 603 is integrally formed on the outer free end of the locking portion 602. The vertical plate section 603 and the locking portion 602 form an L-shaped structure. A limiting bolt 9 is screwed into the vertical plate section 603. When the limiting block 6 slides outward and disengages from the limiting notch 4, the free end of the limiting bolt 9 abuts against the outer circumferential surface of the ring eye 103. A rotating portion 10 is integrally formed at the free end of the threaded pin 2 located on one side of the shoulder 3. The rotating portion 10 is perpendicular to the shoulder 3, and the inner hole of the rotating portion 10 is perpendicular to the axis of the threaded pin 2.

[0020] When this invention is in operation, the free end of the locking block 602 in the limiting block 6 is located in the limiting notch 4 at the shoulder 3 of the threaded pin 2. At this time, the compression spring 7 in the groove 5 is in its natural state. Due to the limiting effect of the locking block 602 on the rotation direction of the shoulder 3, the reverse rotation of the threaded pin 2 can be prevented, thus avoiding loosening of the connection between the threaded pin 2 and the shackle body 1, improving the safety of use. After the shackle body 1 is used, the limiting block 6 is slid outward until the free end of the locking block 602 disengages from the limiting notch 4. At this time, the compression spring 7 is in a compressed state. To facilitate the unlocking of the other limiting block 6, the operator screws a limiting bolt 9 into the vertical plate section 603 of the limiting block 6, so that the free end of the limiting bolt 9 abuts against the outer circumferential surface of the ring eye 103 of the shackle body 1. This prevents the limiting block 6 from returning to the limiting notch 4 due to the reset action of the compression spring 7. After completion, the other limiting block 6 is moved outward using the same method, thereby releasing the threaded pin 2 from the restriction in the rotation direction, so that the threaded pin 2 can be unscrewed from the shackle body 1 to complete the disassembly.

[0021] This utility model is not limited to the above embodiments. Based on the technical solutions disclosed in this utility model, those skilled in the art can make some substitutions and modifications to some of the technical features without creative labor, and these substitutions and modifications are all within the protection scope of this utility model.

Claims

1. An anti-axle reverse unhooking device, comprising an unhooking body (1), the unhooking body (1) comprising a hook top (101), a hook body (102) and a ring eye (103), a threaded pin shaft (2) being screwed into the ring eye (103), characterized in that: A shoulder (3) is integrally provided on the threaded pin (2). The shoulder (3) abuts against the outer end face of the ring eye (103). A limiting notch (4) is provided on the shoulder (3). A groove (5) is provided on the end face of the ring eye (103) located on the side of the limiting notch (4). A limiting block (6) is slidably connected in the groove (5). The free end of the limiting block (6) is located in the corresponding limiting notch (4).

2. A back-off device according to claim 1, wherein: A horizontal compression spring (7) is provided in the groove (5). A convex shaft (8) is provided on the end face of the limiting block (6) located in the groove (5). One end of the compression spring (7) is sleeved on the convex shaft (8), and the other end is fixedly set to the inner wall of the groove (5).

3. A back-off device according to claim 2, wherein: The limiting block (6) includes a slider part (601) located in the groove (5), a locking part (602) integrally provided on the outer surface of the slider part (601), the convex shaft (8) integrally provided on the end face of the slider part (601), and the inner free end of the locking part (602) located in the limiting notch (4).

4. The anti-rotation shackle of claim 3, wherein: The outer free end of the locking block (602) is integrally provided with a vertical plate section (603). The vertical plate section (603) and the locking block (602) form an L-shaped structure. A limiting bolt (9) is screwed into the vertical plate section (603). When the limiting locking block (6) slides outward and disengages from the limiting notch (4), the free end of the limiting bolt (9) abuts against the outer peripheral surface of the ring eye (103).

5. A back-off device according to any one of claims 1 to 4, wherein: A rotating part (10) is integrally provided at the free end of the threaded pin (2) located on one side of the shoulder (3). The rotating part (10) is perpendicular to the shoulder (3), and the inner hole of the rotating part (10) is perpendicular to the axis of the threaded pin (2).

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