Anti-loosening pin shaft structure

Abstract

The anti-loosening pin shaft structure comprises a shaft rod and a limiting assembly, the other end of the shaft rod is provided with a clockwise thread and an anticlockwise thread, the limiting assembly comprises a first limiting block, a second limiting block, a fastening piece and a fastening bolt, the first limiting block is in threaded connection with the clockwise thread through a first threaded hole, and the second limiting block is in threaded connection with the anticlockwise thread through a second threaded hole. The second limiting block is in threaded connection with the anticlockwise threads through the second threaded hole, and the left side and the right side of the first limiting block and the left side and the right side of the second limiting block are each provided with a fastener. Through the arrangement of the clockwise thread, the anticlockwise thread and the limiting assembly, by adopting the design, the first limiting block and the second limiting block are connected with the threads in different directions on the shaft rod, opposite torsions in the two thread directions can be mutually counteracted, and the connection stability is improved; the fastening piece further enhances the connecting strength between the two limiting blocks, mutual restraining is achieved, a stable overall structure is formed, and loosening is effectively prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of pin shafts, in particular to an anti-loosening pin shaft structure. Background Art

[0002] In the existing mechanical connection technology, the pin structure is widely used in the connection of various equipment and mechanical parts. However, during the long-term use of the traditional pin structure, the connection is often faced with complex stress states and rotational motion, which puts extremely high demands on the performance of the connection parts and is prone to loosening or falling off. This loosening phenomenon not only affects the normal operation of mechanical equipment, but may even cause serious safety accidents.

[0003] During the lifting process, the constant change of the stress state at the connection and the existence of rotational motion make the traditional pin connection prone to loosening or falling off. For example, the publication (announcement) number is: CN218598566U, which aims to provide a pin shaft that prevents loosening, including a shaft rod and a separate mother-and-child component, one end of the shaft rod is provided with a shaft cap, and the other end of the shaft rod is provided with a limiting groove; the separate mother-and-child component includes a mother component and a child component, the mother component is composed of a circular ring, and the child component is composed of two semi-circular rings, the mother component can be sleeved on the shaft rod, the child component can be sleeved on the limiting groove, and the child component can be overlapped with the mother component and detachably connected. The utility model effectively avoids the adverse effects of the rotational motion of the pin shaft during use. However, under long-term complex force, a slight relative motion will occur between the mother component and the bolt hole it matches. In addition, the mother component is subjected to vibrations of the same frequency for a long time. Due to the same force, friction between the mother component and the bolt hole will gradually loosen in the same direction. As wear accumulates, the originally tight fit loosens. After the mother component loosens and falls off, the fixing effect of the entire structure is weakened.

[0004] Therefore, those skilled in the art provide an anti-loosening pin shaft structure to solve the problems raised in the above background technology. Utility Model Content

[0005] In order to overcome the above-mentioned defects of the prior art, the utility model provides an anti-loosening pin shaft structure to solve the problems existing in the above-mentioned background technology.

[0006] In order to achieve the above-mentioned purpose, the utility model is implemented through the following technical solutions: an anti-loosening pin shaft structure, including a shaft rod and a limit assembly, one end of the shaft rod is provided with a shaft cap, characterized in that the other end of the shaft rod is provided with a clockwise thread and a counterclockwise thread, the limit assembly includes a first limit block, a second limit block, a fastener and a fastening bolt, the first limit block is provided with a first threaded hole at the center position, the second limit block is provided with a second threaded hole at the center position, the first limit block is threadedly connected with the clockwise thread through the first threaded hole, the second limit block is threadedly connected with the counterclockwise thread through the second threaded hole, and a fastener is respectively provided on the left and right of the first limit block and the second limit block. When the welding powder and the metal compound undergo a reduction reaction under high temperature conditions to become liquid metal, the residual welding powder waste can be separated from the liquid metal by the action of a filter screen made of high temperature resistant material, ensuring that only the liquid metal wraps the cable connection, and before the welding powder is ignited to generate a metal reaction, the two cables are docked and fixed by the cable fixing assembly, which is convenient for alignment and compression during cable connection and enhances the quality of hot melt connection.

[0007] Furthermore, the first limit block and the second limit block have the same cross-sectional size but different heights. During the force-bearing process, the limit blocks with the same cross-sectional size are more conducive to the uniform distribution of force, thereby reducing the possibility of stress concentration and improving the overall strength, durability and stability of the structure. The different heights make it easier for installers to distinguish between the first limit block and the second limit block, reducing the possibility of confusion and improving work efficiency.

[0008] Furthermore, the fastener is connected to the first limit block and the second limit block by a fastening bolt, and the first limit block and the second limit block are connected by the fastener. The connection of the fastener can restrain the first limit block and the second limit block when they are subjected to opposite torque, thereby making the whole more stable, forming a stable overall structure, and greatly improving the reliability of anti-loosening.

[0009] Furthermore, the outer diameter of the counterclockwise thread is smaller than the outer diameter of the clockwise thread, so that the first threaded hole in the first limit block can pass through the counterclockwise thread to be connected with the clockwise thread.

[0010] Furthermore, the depth of the first threaded hole is the same as the length of the clockwise thread, and the depth of the second threaded hole is the same as the length of the counterclockwise thread, ensuring that when the second limit block is connected with the counterclockwise thread, the second limit block can be closely approached with the already connected first limit block to achieve precise alignment, so that the fastener can be installed between the two limit blocks more easily and accurately, further strengthening the entire structure.

[0011] Technical effects and advantages of the utility model:

[0012] The utility model is provided with a clockwise thread and a counterclockwise thread and a first limit block and a second limit block. With this design, the first limit block and the second limit block are connected to threads in different directions on the shaft rod, so the force directions are different, which avoids the two limit blocks with the same force loosening at the same time after being subjected to vibrations of the same frequency for a long time, and because the opposite torques in the two thread directions can offset each other, the stability of the connection is increased.

[0013] The utility model is provided with a fastener and a fastening bolt, and adopts this design to connect the first limit block and the second limit block, further enhancing the connection strength between the two limit blocks. This connection method allows the opposite forces in the thread direction of the two limit blocks to restrain each other when they are subjected to force, forming a stable overall structure, effectively preventing the occurrence of loosening. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the utility model;

[0015] Figure 2 It is a schematic diagram of the internal side structure of the utility model;

[0016] Figure 3 It is a schematic diagram of the structure of the limit assembly of the utility model;

[0017] In the figure: shaft rod 1, limit assembly 2, shaft cap 3, clockwise thread 4, counterclockwise thread 5, first limit block 6, second limit block 7, fastener 8, fastening bolt 9, first threaded hole 10, second threaded hole 11. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] See also Figure 1-3The utility model provides a technical solution: an anti-loosening pin shaft structure, including a shaft rod 1, a limiting assembly 2, one end of the shaft rod 1 is provided with a shaft cap 3, the other end of the shaft rod 1 is provided with a clockwise thread 4 and a counterclockwise thread 5, the limiting assembly 2 includes a first limiting block 6, a second limiting block 7, a fastener 8 and a fastening bolt 9, the first limiting block 6 is provided with a first threaded hole 10 at the center position, the second limiting block 7 is provided with a second threaded hole 11 at the center position, the first limiting block 6 is threadedly connected with the clockwise thread 4 through the first threaded hole 10, the second limiting block 7 is threadedly connected with the counterclockwise thread 5 through the second threaded hole 11, and a fastener 8 is respectively provided on the left and right sides of the first limiting block 6 and the second limiting block 7.

[0020] The first limit block 6 and the second limit block 7 have the same cross-sectional size but different heights. During the force-bearing process, the limit blocks with the same cross-sectional size are more conducive to the uniform distribution of force, thereby reducing the possibility of stress concentration and improving the overall strength, durability and stability of the structure. The different heights make it easier for installers to distinguish between the first limit block 6 and the second limit block 7, reducing the possibility of confusion and improving work efficiency.

[0021] The fastener 8 is connected to the first limit block 6 and the second limit block 7 through the fastening bolt 9, and the first limit block 6 and the second limit block 7 are connected through the fastener 8. The connection of the fastener can make the first limit block 6 and the second limit block 7 restrain each other when they are subjected to opposite torque, thereby making the whole more stable, forming a stable overall structure, and greatly improving the reliability of anti-loosening.

[0022] The outer diameter of the counterclockwise thread 5 is smaller than the outer diameter of the clockwise thread 4 , so that the first threaded hole 10 in the first limiting block 6 can pass through the counterclockwise thread 5 and connect with the clockwise thread 4 .

[0023] The depth of the first threaded hole 10 is the same as the length of the clockwise thread 4, and the depth of the second threaded hole 11 is the same as the length of the counterclockwise thread 5, ensuring that when the second limit block 7 is connected to the counterclockwise thread 5, the second limit block 7 can be closely approached to the already connected first limit block 6 to achieve precise alignment, so that the fastener can be installed between the two limit blocks more easily and accurately, further strengthening the entire structure.

[0024] When this embodiment is in use, after the shaft rod 1 passes through the reserved holes of the two components, the first limit block 6 is passed through the other end of the shaft rod 1 through the first threaded hole 10 and threadedly connected with the clockwise thread 4. Similarly, the second limit block 7 is passed through the other end of the shaft rod 1 through the second threaded hole 11 and threadedly connected with the counterclockwise thread 5. The two limit blocks are connected with threads in different directions, and the depth of the threaded hole is the same as the height of the thread. The thread can be completely screwed into the threaded hole of the limit block, tightly connecting the two limit blocks together, and forming a stable overall structure, which greatly improves the reliability of anti-loosening. The fastener 8 is connected to the first limit block 6 and the second limit block 7 through the fastening bolt 9. When the first limit block 6 and the second limit block 7 are subjected to opposite torque, they restrain each other, thereby making the whole more stable, forming a stable overall structure, and greatly improving the reliability of anti-loosening.

[0025] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An anti-loosening pin structure, comprising a shaft (1) and a limit assembly (2), wherein one end of the shaft (1) is provided with a shaft cap (3), characterized in that: The other end of the shaft (1) is provided with a clockwise thread (4) and a counterclockwise thread (5); the limit assembly (2) comprises a first limit block (6), a second limit block (7), a fastener (8) and a fastening bolt (9); a first threaded hole (10) is provided at the center of the first limit block (6); a second threaded hole (11) is provided at the center of the second limit block (7); the first limit block (6) is threadedly connected to the clockwise thread (4) through the first threaded hole (10); the second limit block (7) is threadedly connected to the counterclockwise thread (5) through the second threaded hole (11); and a fastener (8) is provided on the left and right of the first limit block (6) and the second limit block (7).

2. The anti-loosening pin structure according to claim 1, characterized in that: The first limiting block (6) and the second limiting block (7) have the same cross-sectional size but different heights.

3. The anti-loosening pin structure according to claim 1, characterized in that: The fastener (8) is connected to the first limit block (6) and the second limit block (7) via a fastening bolt (9), and the first limit block (6) and the second limit block (7) are connected via the fastener (8).

4. The anti-loosening pin structure according to claim 3, characterized in that: The outer diameter of the counterclockwise thread (5) is smaller than the outer diameter of the clockwise thread (4).

5. The anti-loosening pin structure according to claim 1, characterized in that: The depth of the first threaded hole (10) is the same as the length of the clockwise thread (4), and the depth of the second threaded hole (11) is the same as the length of the counterclockwise thread (5).

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