A multi-directional adjustable rotary bolt

Abstract

This utility model discloses a multi-directional adjustable rotary bolt, relating to the field of bolt adjustment technology. Its features include: a screw rod and a screw head are fixedly connected, with a rotary connector engaged at the connection point. The rotary connector includes a first hoop, a second hoop, and a third hoop. Hooks are fixedly connected to both ends of the first hoop. Grooves are formed on one end of both the second and third hoops to mate with the hooks. A connecting plate is engaged in the middle of the other end of the second hoop, and is connected by a first pin. A locking plate is engaged in the middle of the other end of the third hoop. This utility model utilizes a hinged combination design (linked by the first, second, and third pins) of the rotary connector, combined with the rotating shaft connection structure between the boom and the fixed base, allowing the boom to rotate freely 360° in both horizontal and vertical directions. This structure solves the problem of uneven load caused by the rigid connection of traditional eye bolts.

Description

Technical Field

[0001] This utility model relates to the field of bolt adjustment technology, specifically to a multi-directional adjustable rotary bolt. Background Technology

[0002] In industrial lifting operations, eye bolts are critical load-bearing components, and their structural design directly affects lifting efficiency and safety. Traditional eye bolts typically consist of a threaded rod and an integral threaded head, with the eye welded to the top of the threaded head. This type of structure has significant drawbacks:

[0003] 1. The lifting ring and the bolt are rigidly connected. The lifting direction must be consistent with the bolt axis. If the force direction is deviated, the bolt will be subjected to lateral shear force, which may easily cause thread deformation or even breakage, posing a safety hazard.

[0004] 2. Under eccentric loading conditions, stress concentration is prone to occur at the connection between the screw head and the screw rod, which may induce fatigue cracks after long-term use;

[0005] 3. When hoisting in narrow spaces or at complex angles, it is necessary to repeatedly adjust the position of the lifting equipment or change the type of bolts, resulting in low work efficiency.

[0006] Therefore, to address the aforementioned technical issues, it is necessary to design a rotary bolt with multi-directional adjustment capabilities, compact structure, and high load-bearing reliability to meet the safe lifting requirements under complex working conditions. Utility Model Content

[0007] The purpose of this invention is to provide a multi-directional adjustable rotating bolt to solve the problems mentioned in the background art.

[0008] To achieve the above objectives, this utility model provides the following technical solution: a multi-directional adjustable rotary bolt, comprising a screw, a screw head, and a rotary connector, characterized in that: the screw and the screw head are fixedly connected, and a rotary connector is engaged at their connection point; the rotary connector comprises a first hoop, a second hoop, and a third hoop; hooks are fixedly connected to both ends of the first hoop; grooves are formed on one end surface of the second and third hoops to match the hooks; a connecting plate is engaged at the middle of the other end of the second hoop and is connected by a first pin; a locking plate is engaged at the middle of the other end of the third hoop; a connecting groove is formed at the connection point between the locking plate and the third hoop, and the upper and lower ends are connected by a second pin; the connecting groove of the connecting plate and the locking plate are matched and connected by a third pin; the locking plate is tightly attached to the outside of the third hoop; the first, second, and third hoops are connected to form a circle, tightly engaged at the connection point between the screw and the screw head, and the diameter of the screw head is larger than the diameter of the rotary connector.

[0009] Preferably, a fixed seat is welded to the outer center of the first hoop, and a boom is connected to the surface of the fixed seat via a rotating shaft. The boom is used to connect to an external lifting device.

[0010] Preferably, the surface of the screw and the rotating connector locking part is not threaded.

[0011] Preferably, the locking plate is arc-shaped and fits against the outer surface of the third hoop. Threaded holes are provided at the fitting points to facilitate fastening with bolts.

[0012] Preferably, the inner surfaces of the first hoop, the second hoop, and the third hoop are all provided with friction-enhancing rubber pads to increase friction with the screw during lifting.

[0013] The technical effects and advantages of this utility model are as follows:

[0014] 1. This utility model utilizes the hinged combination design of the first hoop, the second hoop, and the third hoop in the rotating connector (the first pin, the second pin, and the third pin are linked), combined with the rotating shaft connection structure between the boom and the fixed seat, to allow the boom to rotate freely 360° in both horizontal and vertical directions. This structure solves the problem of eccentric loading caused by the rigid connection of traditional lifting eye bolts. When there is an angle between the lifting direction and the bolt axis, the rotating connector automatically adjusts the angle, effectively avoiding the destructive damage of lateral shear force to the bolt thread and significantly reducing the risk of bolt breakage.

[0015] 2. This utility model utilizes three sets of hoops of the rotary connector to tightly wrap around the connection between the screw and the screw head, and the diameter of the screw head is larger than the diameter of the rotary connector, forming a force-limiting support structure. The locking plate and the third hoop adopt an arc-shaped fitting design and are locked twice by bolts. Combined with the buffering effect of the internal friction-increasing rubber pad, it is easy to disperse the stress at the root of the screw head to the entire surface of the rotary connector, delay the generation of metal fatigue cracks, and improve the long-term reliability under high load conditions. Attached Figure Description

[0016] Figure 1 This is a three-dimensional view of the present utility model.

[0017] Figure 2 This is a perspective view of the rotating connector of this utility model.

[0018] Figure 3 This is a perspective view of the rotating connector of this utility model.

[0019] Figure 4 This is a cross-sectional view of the rotary connector of this utility model.

[0020] In the diagram: 1. Screw; 2. Screw head; 3. Rotary connector; 31. First hoop; 32. Second hoop; 33. Third hoop; 4. Hook; 5. Slot; 6. First pin; 7. Connecting plate; 8. Second pin; 9. Locking plate; 91. Connecting groove; 10. Third pin; 11. Threaded hole; 12. Fixed seat; 13. Rotating shaft; 14. Boom; 15. Friction-enhancing pad. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Example 1: This utility model provides the following... Figure 1-4 The illustrated multi-directional adjustable rotary bolt includes a screw 1, a screw head 2, and a rotary connector 3. The screw 1 and screw head 2 are integrally forged. One end of the screw 1 is threaded for connecting to the hoisted component, while the other end is a smooth cylinder that engages with the rotary connector 3. The rotary connector 3 includes a first clamp 31, a second clamp 32, and a third clamp 33. Hooks 4 are welded to both ends of the first clamp 31. Grooves 5 are formed on one end of the second clamp 32 and the third clamp 33 to engage with the hooks 4. The first clamp 31, second clamp 32, and third clamp 33 form a preliminary circular frame. A connecting plate 7 is engaged at the center of the other end of the second clamp 32. The first pin 6 is connected through, and the locking plate 9 is engaged at the middle of the other end of the third hoop 33. A connecting groove 91 is opened at the connection between one end of the locking plate 9 and the third hoop 33, and the upper and lower ends are connected through the second pin 8. The connecting plate 7 cooperates with the connecting groove 91 opened in the locking plate 9, and is connected through the third pin 10. The locking plate 9 has an arc-shaped structure and is close to the outside of the third hoop 33. Threaded holes 11 are opened through the joints to facilitate fastening with bolts. The diameter of the screw head 2 is larger than the diameter of the rotating connector 3, forming a force-limiting support structure. The friction-increasing rubber pad 15 is attached to the inner wall of the third hoop to increase the frictional resistance with the screw 1.

[0023] Example 2: Based on Example 1, a hoisting function is added. A fixed seat 12 is welded to the center of the outer wall of the first hoop 31. A hoisting hole is opened at the end of the boom 14, which is connected to the fixed seat 12 through the rotating shaft 13, so that the boom 14 can be rotated and the angle can be adjusted by the rotating shaft 13.

[0024] Working principle: When there is an angle between the lifting direction and the axis of the screw 1, the external force is transmitted to the boom 14, the fixed seat 12, and the first hoop 31. The first pin 6 allows the second hoop 32 to swing horizontally relative to the first hoop 31. The third pin 10 makes the connecting plate 7 and the locking plate 9 form a connecting hinge. The rotating shaft 13 provides the horizontal angle of the boom 14. The rotating connecting piece 3 automatically rotates to compensate for the angle deviation. Combined with the buffering effect of the internal friction-increasing rubber pad 15, it delays the generation of metal fatigue cracks and improves the long-term reliability under high load conditions.

[0025] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A multi-directional adjustable rotary bolt, comprising a screw (1), a screw head (2), and a rotary connector (3), characterized in that: The screw (1) is fixedly connected to the screw head (2), and a rotating connector (3) is engaged at the connection point. The rotating connector (3) includes a first hoop (31), a second hoop (32), and a third hoop (33). The first hoop (31) has hooks (4) fixedly connected to both ends. The second hoop (32) and the third hoop (33) each have a slot (5) on one end surface that matches the hook (4). A connecting plate (7) is engaged in the middle of the other end of the second hoop (32), and is connected by a first pin (6). A locking plate is engaged in the middle of the other end of the third hoop (33). 9) A connecting groove (91) is provided at one end of the locking plate (9) and the third hoop (33), and the upper and lower ends are connected through the second pin (8). The connecting plate (7) cooperates with the connecting groove (91) of the locking plate (9) and is connected through the third pin (10). The locking plate (9) is close to the outside of the third hoop (33). The first hoop (31), the second hoop (32) and the third hoop (33) are connected to form a circle, which is tightly locked to the end of the screw (1) and the screw head (2), and the diameter of the screw head (2) is larger than the diameter of the rotating connector (3).

2. A multi-directional adjustable rotary bolt according to claim 1, characterized in that, The first hoop (31) has a fixed seat (12) welded to its outer center. The surface of the fixed seat (12) is connected to a boom (14) via a rotating shaft (13). The boom (14) is used to connect to an external lifting device.

3. A multi-directional adjustable rotary bolt according to claim 1, characterized in that, The screw (1) and the rotating connector (3) locking surface are not threaded.

4. A multi-directional adjustable rotary bolt according to claim 1, characterized in that, The locking plate (9) is arc-shaped and fits against the outer surface of the third hoop (33). Threaded holes (11) are provided at the fitting points to facilitate fastening with bolts.

5. A multi-directional adjustable rotary bolt according to claim 1, characterized in that, The inner surfaces of the first hoop (31), the second hoop (32) and the third hoop (33) are all provided with friction-enhancing rubber pads (15) to increase the friction between the hoop and the screw (1) during lifting.

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