Torque limiting mechanism with built-in screw plug

Abstract

The utility model discloses a screw plug built-in torque limiting mechanism which comprises a column body, threads are arranged on the column body, a circular groove is formed in the end portion of the column body, an annular groove is formed in the inner wall of the circular groove, a mounting ring is arranged in the annular groove through an upward ejecting mechanism, and an inner friction ring is arranged in the circular groove through a dismounting mechanism. A rotating block is arranged in the circular groove, an outer friction ring corresponding to the inner friction ring is arranged on the rotating block, and a rotating channel is formed in the rotating block. According to the structural design, through the simple combination of the cylinder, the spring, the inner friction ring, the outer friction ring and other components, a complex transmission and control structure is abandoned, and the manufacturing difficulty and cost are greatly reduced.

Description

Technical Field

[0001] This utility model relates to the field of mechanical manufacturing technology, and in particular to a screw plug built-in torque limiting mechanism. Background Technology

[0002] A screw plug is a part used to seal and plug threaded holes in various equipment, pipes or containers. Screw plugs are usually equipped with a torque limiting mechanism to ensure that the torque does not exceed the limit that the thread can withstand when tightening the screw plug, thus protecting the thread structure.

[0003] Existing torque limiting mechanisms employ complex mechanical transmission devices and multiple components to achieve their torque limiting function. For example, some mechanisms include multiple gears, springs, clutches, and other components that work together to sense and limit torque. This complex structure not only increases the difficulty of manufacturing and assembly but also raises costs. Furthermore, the large number of components makes them prone to failure, reducing reliability. Moreover, accommodating such complex torque limiting structures often requires significant space, limiting their application range. To address this issue, a screw-plug-in torque limiting mechanism is proposed. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a screw plug-in torque limiting mechanism.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] The screw plug has a built-in torque limiting mechanism, including a column with threads, a circular groove at the end of the column, an annular groove on the inner wall of the circular groove, an installation ring in the annular groove via an upper lifting mechanism, an inner friction ring in the circular groove via a disassembly and assembly mechanism, a rotating block in the circular groove, an outer friction ring on the rotating block corresponding to the inner friction ring, and a rotation channel on the rotating block.

[0007] Preferably, the upper lifting mechanism includes multiple springs disposed in the annular groove, with both ends of the multiple springs connected to the outer wall of the mounting ring and the inner wall of the annular groove, respectively.

[0008] Preferably, the disassembly and assembly mechanism includes multiple positioning blocks disposed on the inner friction ring, and the inner wall of the annular groove is provided with multiple positioning grooves corresponding to the positioning blocks.

[0009] Preferably, the end of the column is provided with a plurality of disassembly and assembly ports communicating with the annular groove, and the plurality of disassembly and assembly ports are provided corresponding to the positioning blocks.

[0010] Preferably, the plurality of disassembly ports, positioning grooves and positioning blocks are distributed circumferentially at equal intervals, and the plurality of disassembly ports and positioning grooves are designed in an alternating manner.

[0011] Preferably, both the inner and outer friction rings are provided with multiple protrusions, and the cross-sectional view of the rotation channel is a regular hexagon.

[0012] The beneficial effects of this utility model are:

[0013] 1. The circular groove at the end of the column and the annular groove on the inner wall provide installation space and positioning for components such as the upper lifting mechanism, mounting ring, and inner friction ring, resulting in a compact and reasonable structure.

[0014] 2. The circumferentially evenly spaced and staggered design of the disassembly and assembly ports, positioning grooves, and positioning blocks makes the disassembly and assembly of the inner friction ring more convenient, avoids interference, and improves efficiency.

[0015] 3. The inner friction ring and the outer friction ring are in contact with each other and both are provided with protrusions to increase friction. When the torque is too large, the outer friction ring rotates relative to the inner friction ring to prevent the column from rotating and protect the equipment.

[0016] 4. The outer friction ring is easily disassembled along with the rotating block, facilitating inspection, maintenance, and replacement; after the rotating block is disassembled, the inner friction ring can be easily disassembled through specific operations, reducing maintenance costs.

[0017] 5. The cross-section of the rotating channel is a regular hexagon, which makes it easy to drive the rotating block to rotate with tools such as hex wrenches, thereby realizing the disassembly and assembly of the column. The operation is simple and efficient. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the screw plug built-in torque limiting mechanism proposed in this utility model;

[0019] Figure 2 for Figure 1 A schematic diagram of the vertical section structure;

[0020] Figure 3 for Figure 2 Enlarged schematic diagram of the structure at point A;

[0021] Figure 4 for Figure 1 Another vertical section diagram of the structure;

[0022] Figure 5 for Figure 4 Enlarged schematic diagram of the structure at point B.

[0023] In the diagram: 1. Column, 2. Thread, 3. Circular groove, 4. Rotating block, 5. External friction ring, 6. Rotating channel, 7. Disassembly port, 8. Annular groove, 9. Mounting ring, 10. Spring, 11. Internal friction ring, 12. Positioning groove, 13. Positioning block. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0025] Reference Figure 1-5 The column 1 is the basic support component of the entire torque limiting mechanism, and its shape is columnar. Threads 2 are provided on the outer surface of the column 1. The function of these threads 2 is to enable the column 1 to be threadedly connected to other components with corresponding internal threads, such as when installed at specific interfaces of mechanical equipment, serving a sealing and connection function.

[0026] A circular groove 3 is provided at the end of the column 1, which provides space for the installation of other components. An annular groove 8 is machined on the inner wall of the circular groove 3. The annular groove 8 is a groove that surrounds the inner wall of the circular groove 3. It is mainly used to install and accommodate the top mechanism and the mounting ring 9, providing specific space and positioning for the operation of these components.

[0027] The upper lifting mechanism includes multiple springs 10 disposed within the annular groove 8. These springs 10 are evenly distributed along the circumference of the annular groove 8, and their two ends are respectively tightly connected to the outer wall of the mounting ring 9 and the inner wall of the annular groove 8. The function of the springs 10 is to provide an upward elastic force to the mounting ring 9.

[0028] The inner friction ring 11 is installed in the circular groove 3 and is connected to the column 1 via a disassembly and assembly mechanism. The disassembly and assembly mechanism includes multiple positioning blocks 13 disposed on the inner friction ring 11, and multiple positioning grooves 12 corresponding to the positioning blocks 13 are provided on the upper inner wall of the annular groove 8. The cooperation between the positioning blocks 13 and the positioning grooves 12 serves to position and fix the inner friction ring 11.

[0029] The end of the column 1 is provided with multiple disassembly ports 7 that communicate with the annular groove 8. These disassembly ports 7 are correspondingly arranged with the positioning blocks 13. The multiple disassembly ports 7, the positioning grooves 12, and the positioning blocks 13 are all circumferentially evenly distributed, and the multiple disassembly ports 7 and the positioning grooves 12 are staggered. The advantage of this design is that when installing and removing the inner friction ring 11, the operator can insert or remove the positioning blocks 13 into or out of the annular groove 8 through the disassembly ports 7. The staggered design can avoid interference of the positioning blocks 13 during installation or removal, thus improving the convenience and efficiency of disassembly and assembly.

[0030] An outer friction ring 5 corresponding to the inner friction ring 11 is provided on the rotating block 4. The inner friction ring 11 and the outer friction ring 5 are in contact with each other. When the rotating block 4 rotates, friction is generated between the inner friction ring 11 and the outer friction ring 5. Both the inner friction ring 11 and the outer friction ring 5 are provided with multiple protrusions. The function of these protrusions is to increase the friction between the two, thereby better realizing the torque limiting function.

[0031] The rotating block 4 is also provided with a rotating channel 6. The cross-sectional view of the rotating channel 6 is a regular hexagon. This regular hexagonal design makes it easy to use the corresponding tools (such as hex wrenches) to insert into the rotating channel 6, thereby driving the rotating block 4 to rotate, and thus rotating the column 1.

[0032] When using this invention, a suitable tool (such as a hex wrench) is inserted into the rotating channel 6, and then the tool is rotated to make the rotating block 4 rotate. The outer friction ring 5 on the rotating block 4 can drive the inner friction ring 11 to rotate. When the inner friction ring 11 rotates, since the positioning block 13 is in the positioning groove 12, it can drive the column 1 to rotate, thereby realizing the assembly and disassembly of the column 1. When the torque is too large, the outer friction ring 5 will rotate relative to the inner friction ring 11 and will not realize the rotation of the column 1, thus playing a limiting and protective role.

[0033] In this design, the outer friction ring 5 is easily disassembled along with the rotating block 4, and can be easily inspected, maintained and replaced after it is separated from the circular groove 3.

[0034] With the rotating block 4 disassembled, the inner friction ring 11 is pressed down, causing the positioning block 13 to descend synchronously. Then, the positioning block 13 presses down on the mounting ring 9 and compresses the spring 10. After the positioning block 13 is completely disassembled from the positioning groove 12, the inner friction ring 11 is rotated, causing the positioning block 13 to rotate to correspond with the disassembly / removal port 7. The inner friction ring 11 can then be lifted to complete the disassembly, thus facilitating its inspection, maintenance, and replacement.

[0035] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A torque limiting mechanism with a built-in screw plug, comprising a cylinder (1), characterized in that, The column (1) is provided with a thread (2), the end of the column (1) is provided with a circular groove (3), the inner wall of the circular groove (3) is provided with an annular groove (8), the annular groove (8) is provided with a mounting ring (9) through a lifting mechanism, the circular groove (3) is provided with an inner friction ring (11) through a dismounting mechanism, the circular groove (3) is provided with a rotating block (4), the rotating block (4) is provided with an outer friction ring (5) corresponding to the inner friction ring (11), and the rotating block (4) is provided with a rotating channel (6).

2. The screw plug built-in torque limiting mechanism according to claim 1, wherein The lifting mechanism comprises a plurality of springs (10) arranged in the annular groove (8), and the two ends of the plurality of springs (10) are connected with the outer wall of the mounting ring (9) and the inner wall of the annular groove (8) respectively.

3. The screw plug built-in torque limiting mechanism according to claim 2, wherein The dismounting mechanism comprises a plurality of positioning blocks (13) arranged on the inner friction ring (11), and the inner wall of the annular groove (8) is provided with a plurality of positioning grooves (12) corresponding to the positioning blocks (13).

4. The screw plug built-in torque limiting mechanism according to claim 3, wherein The end of the column (1) is provided with a plurality of dismounting openings (7) in communication with the annular groove (8), and the plurality of dismounting openings (7) are arranged correspondingly with the positioning blocks (13).

5. The screw plug built-in torque limiting mechanism according to claim 4, wherein The plurality of dismounting openings (7), the positioning grooves (12) and the positioning blocks (13) are distributed at equal intervals in the circumferential direction, and the plurality of dismounting openings (7) and the positioning grooves (12) are designed alternately.

6. The screw plug built-in torque limiting mechanism according to claim 5, wherein The inner friction ring (11) and the outer friction ring (5) are both provided with a plurality of convex points, and the transverse sectional view of the rotating channel (6) is a regular hexagon.

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