Screw-locking mechanical connection device

Abstract

The utility model relates to building engineering material technical field discloses screw lock formula mechanical connection device, including small nut sleeve, the inner wall screw thread connection of small nut sleeve has the plug -in rod, the outer wall fixed connection of plug -in rod has the limit board, the top fixed connection of plug -in rod has the ball head, the outer wall sliding connection of plug -in rod has the connecting piece, the top of connecting piece all fixed connection has a plurality of bending elastic sheet, the outer wall screw thread connection of connecting piece has big nut sleeve, the outer wall of plug -in rod is set up and has the annular groove. In the utility model, through electric tool, it is ensured that each plug -in rod is consistent with the end face height, finally relies on the self weight of stake and makes the plug -in rod insert into the middle nut and forms the stable butt joint, thereby effectively avoided the shaking of connecting part, guaranteed the stability and stress consistency of overall structure after component butt joint, is applicable to a variety of engineering scene and complex geological condition.

Description

Technical Field

[0001] This utility model relates to the field of building materials technology, and in particular to a screw-lock mechanical connection device. Background Technology

[0002] The screw-lock mechanical connection device consists of large and small nuts fixed at both ends of the pile, insert rods, an intermediate nut, locking plates, washers, and springs. It achieves rapid docking through a threaded connection at the upper end and a reverse snap-locking mechanism at the lower end. The insert rod's ball end features a snap-locking, tapered bevel design, ensuring real-time locking within acceptable error ranges. Before pile connection, the insert rods are installed using power tools, automatically ensuring each rod is aligned with the end face. The rods then insert into the intermediate nut under the weight of the pile, achieving zero-gap self-locking of the connector and a seamless joint.

[0003] The screw-lock mechanical connection device uses components such as insert rods, intermediate nuts, and locking plates that are pre-fixed at both ends of the component to achieve a fixed connection with the component through the threaded structure of the insert rods. At the same time, the tapered inclined surface at the end of the insert rods engages with the locking plates inside the intermediate nuts to lock the components. During the component docking process, the insert rods are driven by their own weight or external force to insert into the intermediate nuts and drive the locking plates to automatically lock, achieving zero-gap self-locking. This completes the rapid and tight connection between components and ensures the effective transmission of force.

[0004] In existing technologies, after long-term use, the threads may wear and deform due to excessive load, frequent disassembly and assembly, or material fatigue, resulting in an increase in the thread meshing clearance. Even if initially tightened, the presence of clearance will cause radial or axial relative displacement, leading to shaking. Therefore, a screw-lock mechanical connection device is proposed to solve the above problems. Utility Model Content

[0005] To overcome the above deficiencies, this utility model provides a screw-lock mechanical connection device, which aims to improve the problems of improper installation and operation, failure of locking structure, and wear or deformation of threads in the prior art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A screw-lock mechanical connection device includes a small nut sleeve, an insert rod threadedly connected to the inner wall of the small nut sleeve, a limit plate fixedly connected to the outer wall of the insert rod, a ball head fixedly connected to the top of the insert rod, a connector slidably connected to the outer wall of the insert rod, multiple bent spring pieces fixedly connected to the top of each connector, a large nut sleeve threadedly connected to the outer wall of the connector, and an annular groove formed on the outer wall of the insert rod.

[0008] As a further description of the above technical solution:

[0009] The sleeve between the bent spring and the inner wall of the large nut sleeve has an included angle greater than zero, and the annular groove is set as a stop surface on the side of the groove away from the small nut sleeve;

[0010] As a further description of the above technical solution:

[0011] The inner wall of the small nut sleeve is provided with a threaded groove, and the inner wall of the large nut sleeve is provided with a threaded groove.

[0012] As a further description of the above technical solution:

[0013] The bottom end of the limiting plate contacts the top end of the small nut sleeve, and the adjacent sides of the plurality of bent spring pieces are slidably connected to the outer wall of the insert rod;

[0014] As a further description of the above technical solution:

[0015] The top ends of the plurality of bent spring pieces are in contact with the bottom end of the ball head, and the outer walls of the plurality of bent spring pieces are slidably connected to the inner wall of the large nut sleeve.

[0016] This utility model has the following beneficial effects:

[0017] In this invention, the insertion rod and the small nut sleeve are threaded together to achieve basic fixation. The limiting plate on the outer wall restricts the position of the small nut sleeve. The ball head pushes the bent spring at the top of the connector to open it and engages the bottom of the ball head. The annular groove limits the bending spring. After the large nut sleeve is threadedly connected to the connector, it presses the bent spring to lock. When the screw-lock mechanical connection device is fixed, it achieves zero-gap self-locking by relying on the clamping platform-type conical inclined surface design of the insertion rod and the tight engagement of the locking piece inside the middle nut. Combined with the upper threaded connection and the lower reverse clamping locking method, it achieves zero-gap self-locking. In addition, before the pile is connected, the height of each insertion rod and the end face are ensured to be consistent by a power tool. Finally, the weight of the pile makes the insertion rod insert into the middle nut to form a stable connection, thereby effectively avoiding the shaking of the connection part and ensuring the stability and stress consistency of the overall structure after the components are connected. It is suitable for various engineering scenarios and complex geological conditions. Attached Figure Description

[0018] Figure 1 This is a three-dimensional schematic diagram of the screw-lock mechanical connection device proposed in this utility model;

[0019] Figure 2 This is a schematic diagram of the structure of the large nut sleeve of the screw-lock mechanical connection device proposed in this utility model;

[0020] Figure 3 This is a schematic diagram of the structure of the small nut sleeve of the screw-lock mechanical connection device proposed in this utility model;

[0021] Figure 4 The following is a schematic diagram illustrating the structure of the connecting component of the screw-lock mechanical connection device proposed in this utility model:

[0022] 1. Small nut sleeve; 2. Insert rod; 3. Limiting plate; 4. Ball head; 5. Connector; 6. Bending spring; 7. Large nut sleeve; 8. Annular groove. Detailed Implementation

[0023] 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.

[0024] Reference Figures 1 to 3 This utility model provides an embodiment of a screw-lock mechanical connection device, including a small nut sleeve 1, with a plug rod 2 threadedly connected to the inner wall of the small nut sleeve 1. The inner wall of the small nut sleeve 1 and the plug rod 2 are threadedly connected, and the two are basically fixed through thread engagement, providing initial connection support for the entire device. A limit plate 3 is fixedly connected to the outer wall of the plug rod 2. The limit plate 3 is fixed to the outer wall of the plug rod 2 to limit the small nut sleeve 1 and ensure the accurate relative position of the connecting parts. A ball head 4 is fixedly connected to the top of the plug rod 2. During the sliding process of the connecting part 5, the ball head can push and bend the spring piece 6 to open it.

[0025] A connector 5 is slidably connected to the outer wall of the insertion rod 2. The connector 5 is slidably connected to the outer wall of the insertion rod 2 and can move along the axial direction of the insertion rod 2. It is a key component in the connection device for transmitting force and realizing engagement. Multiple bent spring pieces 6 are fixedly connected to the top of the connector 5. The multiple bent spring pieces 6 are fixed to the top of the connector 5 and open when squeezed by the ball head 4. After the squeezing is completed, the ball head 4 is engaged, realizing the initial engagement between the connector 5 and the insertion rod 2. A large nut sleeve 7 is threadedly connected to the outer wall of the connector 5. When tightened, the large nut sleeve 7 can press the bent spring pieces 6 and make them firmly embedded in the annular groove 8, enhancing the stability of the connection. An annular groove 8 is opened on the outer wall of the insertion rod 2. The annular groove 8 is opened on the outer wall of the insertion rod 2 to limit the connector 5.

[0026] Reference Figures 2 to 4The sleeves between the bending spring 6 and the inner wall of the large nut sleeve 7 have an included angle greater than zero, providing deformation space for the bending spring 6. The annular groove 8 has a stop surface on the side of the groove away from the small nut sleeve 1, preventing the bending spring 6 from moving away from the small nut sleeve 1, thus achieving axial limiting and preventing loosening of the connection. A threaded groove is formed on the inner wall of the small nut sleeve 1. The threaded engagement of the insert rod 2 with the outer wall thread allows for detachable fixing of both components, establishing the connection foundation. The inner wall of the large nut sleeve 7 has a threaded groove that matches the threaded engagement of the outer wall thread of the connector 5. When tightened, it generates axial pressure, pressing and bending the spring 6 to strengthen the locking. The bottom end of the limiting plate 3 contacts the top end of the small nut sleeve 1, limiting the depth to which the insert rod 2 is screwed into the small nut sleeve 1, ensuring accurate installation of the insert rod 2.

[0027] Multiple bent spring pieces 6 are slidably connected to the outer wall of the insert rod 2 on their adjacent sides. When sliding along the insert rod 2, they are guided by it. The top of the multiple bent spring pieces 6 contacts the bottom of the ball head 4. The ball head 4 opens the spring pieces by squeezing them with its curved surface. After squeezing, it locks the ball 4 in place. The outer wall of the multiple bent spring pieces 6 is slidably connected to the inner wall of the large nut sleeve 7. The large nut sleeve 7 guides the deformation of the spring pieces through sliding contact with the inner wall, ensuring uniform squeezing force.

[0028] Working principle: When the device is working, the insertion rod 2 is connected to the threaded groove on the inner wall of the small nut sleeve 1 through the thread, forming a preliminary fixed structure. The limiting plate 3 on the outer wall of the insertion rod 2 limits the depth of the insertion rod 2 into the small nut sleeve 1, ensuring that the installation position of the insertion rod 2 is accurate. When the connecting piece 5 slides along the outer wall of the insertion rod 2, the bent spring piece 6 at the top is squeezed by the ball head 4 at the top of the insertion rod 2 and opens. When it moves to the bottom of the ball head 4, the squeezing ends, and the bent spring piece 6 rebounds to engage with the ball head 4, realizing the preliminary engagement between the connecting piece 5 and the insertion rod 2. The large nut sleeve 7 is screwed into the thread on the outer wall of the connecting piece 5, gradually tightening and pressing the bent spring piece 6. The annular groove 8 is used to limit the bent spring piece 6 engaged in the annular groove 8. Through the dual action of thread locking and spring piece engagement, the stable connection of the mechanical structure is completed.

[0029] When the screw-lock mechanical connection device is used for fixed connection, it achieves zero-gap self-locking by relying on the clamping platform-type conical inclined surface design of the insertion rod 2 and the tight engagement of the locking plate inside the middle nut. Combined with the upper threaded connection and the lower reverse clamping locking method, it ensures that each insertion rod 2 is at the same height as the end face by using a power tool before pile connection. Finally, the weight of the pile makes the insertion rod 2 insert into the middle nut to form a stable connection. This effectively avoids shaking of the connection part and ensures the stability and stress consistency of the overall structure after the components are connected. It is suitable for various engineering scenarios and complex geological conditions.

[0030] 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 mechanical connection device of the screw-lock type comprising a small nut sleeve (1), characterized in that: The inner wall of the small nut sleeve (1) is threaded with a plug rod (2), the outer wall of the plug rod (2) is fixedly connected with a limit plate (3), the top end of the plug rod (2) is fixedly connected with a ball head (4), the outer wall of the plug rod (2) is slidably connected with a connector (5), the top end of the connector (5) is fixedly connected with multiple bent spring pieces (6), the outer wall of the connector (5) is threaded with a large nut sleeve (7), and the outer wall of the plug rod (2) is provided with an annular groove (8).

2. A mechanical screw connection according to claim 1, characterized in that: The sleeve between the bent spring (6) and the inner wall of the large nut sleeve (7) has an included angle greater than zero, and the annular groove (8) is set as a stop surface on the side of the groove away from the small nut sleeve (1).

3. The mechanical screw lock connection of claim 1, wherein: The inner wall of the small nut sleeve (1) is provided with a threaded groove, and the inner wall of the large nut sleeve (7) is provided with a threaded groove.

4. The mechanical screw lock connection of claim 1, wherein: The bottom end of the limiting plate (3) is in contact with the top end of the small nut sleeve (1), and the adjacent sides of the plurality of bent spring pieces (6) are slidably connected to the outer wall of the insert (2).

5. The mechanical interlocking device of claim 1, wherein: The top ends of the plurality of bent spring pieces (6) are in contact with the bottom end of the ball head (4), and the outer walls of the plurality of bent spring pieces (6) are slidably connected to the inner wall of the large nut sleeve (7).

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