Compression machine grounding terminal anti-loosening bolt with self-locking thread

Abstract

The utility model belongs to compressor technical field, concretely relates to a compressor grounding terminal anti-loose bolt with self-locking thread, including compressor body, be provided with three binding posts on compressor body, every binding post is connected with the wire of outside through bolt, and the bolt is composed of hexagonal head, first screw rod, second screw rod and third screw rod, every first screw rod, second screw rod and third screw rod are all set up the through -hole of intercommunication, and first screw rod bottom and third screw rod top all set up four sliding slots, every sliding slot inside is provided with elastic moving assembly, and the second screw rod is composed of four sector blocks, every sector block top and bottom are connected with a group of elastic components, and every sector block inner wall is provided with first magnetic surface. The device effectively prevents the loosening of the bolt, solves the loosening problem of the compressor grounding terminal under harsh working conditions, and ensures the long-term safety and reliability of electrical connection.

Description

Technical Field

[0001] This utility model belongs to the field of compressor technology, specifically relating to a compressor grounding terminal anti-loosening bolt with self-locking threads. Background Technology

[0002] During the operation of compressor equipment, a reliable connection of the grounding terminal is crucial for ensuring the safe and stable operation of the equipment. The anti-loosening performance of the bolts used to connect the grounding terminal to the external conductor directly affects the connection effect. Traditional compressor grounding terminal connection bolts mostly use ordinary thread structures, relying solely on the friction between the threads and auxiliary components such as spring washers and nuts for tightening. However, in actual working conditions, this conventional anti-loosening method faces many challenges.

[0003] Compressors generate continuous mechanical vibrations during operation, which gradually weaken the friction between the threads, causing the bolts to loosen. Once the bolts loosen, the contact resistance between the grounding wire terminal and the connector increases, not only reducing grounding efficiency but also potentially causing grounding failure. This can electrify the compressor casing, posing a risk of electric shock to operators and even potentially leading to serious accidents such as electrical fires. Furthermore, some compressors operate in complex environments with high temperatures, high humidity, or corrosive gases, which accelerates the aging and corrosion of anti-loosening components such as spring washers, further reducing their effectiveness.

[0004] Although some new anti-loosening technologies have emerged in the market, such as threadlockers and nylon ring nuts, these methods still have limitations. Threadlockers are prone to failure in high-temperature environments, and their anti-loosening performance decreases significantly after frequent disassembly and assembly; under long-term vibration, the elasticity of the nylon ring in nylon ring nuts weakens, making it difficult to maintain their anti-loosening effect for long periods.

[0005] To address this issue, we propose a compressor grounding terminal anti-loosening bolt with a self-locking thread. This device effectively prevents the bolt from loosening, solves the problem of compressor grounding terminal loosening under harsh operating conditions, and ensures the long-term safety and reliability of the electrical connection. Utility Model Content

[0006] The purpose of this invention is to provide a compressor grounding terminal anti-loosening bolt with self-locking threads. This device effectively prevents the bolt from loosening, solves the problem of compressor grounding terminal loosening under harsh working conditions, and ensures the long-term safety and reliability of electrical connection.

[0007] The specific technical solution adopted by this utility model is as follows: A compressor grounding terminal anti-loosening bolt with self-locking threads includes a compressor body, on which three terminals are provided, each of which is connected to an external wire via a bolt; The bolt consists of a hexagonal head, a first screw, a second screw, and a third screw. The first screw, the second screw, and the third screw are all provided with interconnected through holes. The bottom of the first screw and the top of the third screw are each provided with four sliding grooves. Each sliding groove is provided with an elastic moving component. The second screw is composed of four sector blocks. The top and bottom of each sector block are connected to a set of elastic moving components. Each sector block has a first magnetic surface on its inner wall. The hexagonal head has a circular groove, and the inner wall of the bottom of the circular groove has a movable hole that communicates with the through hole. A movable rod is provided inside the movable hole. A limit plate is provided at the top of the movable rod. A cylindrical block is provided at the bottom of the movable rod. A second magnetic surface that repels the first magnetic surface is provided on the outer side of the cylindrical block.

[0008] Furthermore, the first screw, the second screw, and the third screw are provided with interlocking threads.

[0009] Furthermore, the elastic moving component includes a fixed shaft disposed inside the slide groove, a spring and a slider are sleeved on the fixed shaft, one side of the slider is connected to the spring, and the surface of the slider is connected to the sector block.

[0010] Furthermore, the slider matches the groove.

[0011] Furthermore, a third magnetic surface is provided at the bottom of the limiting disk, and a fourth magnetic surface is provided on the inner wall of the circular groove that attracts the third magnetic surface.

[0012] Furthermore, a pressure plate is installed at the bottom of the third screw, and the pressure plate is provided with an anti-slip surface.

[0013] Furthermore, the diameter of the cylindrical block matches the through hole.

[0014] The technical effects achieved by this utility model are as follows: Tighten the hexagonal head with a tool. Screw the threaded part of the bolt into the threaded hole of the compressor terminal. The tightening force presses the grounding wire terminal between the terminal and the bolt head (or washer). Then, the limiting plate drives the movable rod to press down. The cylindrical block at its bottom moves inside the through hole to the center of the four sector blocks of the second screw. The second magnetic surface of the cylindrical block generates a continuous mutual repulsive force with the first magnetic surface of the inner wall of each sector block. This repulsive force forces the four sector blocks to open outward through the elastic moving component, so that the end face of the sector block is pressed tightly against the surface of the mounting base for limiting and preventing the bolt from rotating in the opposite direction and loosening. Attached Figure Description

[0015] Figure 1 is a schematic diagram of the overall structure of this utility model; Figure 2 is a structural schematic diagram of the bolt of this utility model; Figure 3 is a schematic diagram of the structure of the bolt of this utility model when it is in operation; Figure 4 is an exploded view of the bolt of this utility model; Figure 5 is a bottom view of the disassembled bolt of this utility model.

[0016] The attached diagram lists the components represented by each number as follows: 1. Compressor body; 2. Terminal block; 3. Hexagonal head; 4. First screw; 5. Second screw; 6. Third screw; 7. Through hole; 8. Slide groove; 9. Sector block; 11. Circular groove; 12. Movable rod; 13. Limiting plate; 14. Cylindrical block; 15. Fixed shaft; 16. Spring; 17. Slider. Detailed Implementation

[0017] To make the objectives and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of this utility model and does not strictly limit the scope of protection specifically claimed by this utility model.

[0018] like Figure 1 - As shown in Figure 5, a compressor grounding terminal anti-loosening bolt with self-locking thread includes a compressor body 1, and three terminals 2 are provided on the compressor body 1. Each terminal 2 is connected to an external wire through a bolt. The bolt consists of a hexagonal head 3, a first screw 4, a second screw 5, and a third screw 6. Each of the first screw 4, the second screw 5, and the third screw 6 has interconnected through holes 7. The bottom of the first screw 4 and the top of the third screw 6 each have four sliding grooves 8. Each sliding groove 8 contains an elastic moving component. The second screw 5 consists of four sector blocks 9. The top and bottom of each sector block 9 are connected to a set of elastic moving components. Each sector block 9 has a first magnetic surface on its inner wall. The hexagonal head 3 has a circular groove 11. The bottom inner wall of the circular groove 11 has a movable hole that communicates with the through hole 7. A movable rod 12 is installed inside the movable hole. A limit plate 13 is installed at the top of the movable rod 12. A cylindrical block 14 is installed at the bottom of the movable rod 12. A second magnetic surface that repels the first magnetic surface is installed on the outside of the cylindrical block 14.

[0019] The first screw 4, the second screw 5, and the third screw 6 are provided with interlocking threads, which ensures that the bolts can be screwed into the threaded holes of the compressor terminals without causing interference.

[0020] Meanwhile, the elastic moving component includes a fixed shaft 15 disposed inside the slide groove 8. A spring 16 and a slider 17 are sleeved on the fixed shaft 15. One side of the slider 17 is connected to the spring 16, and the surface of the slider 17 is connected to the sector block 9. When the second magnetic surface of the cylindrical block 14 generates a continuous mutual repulsive force with the first magnetic surface of the inner wall of each sector block 9, the sector block 9 drives the slider 17 to move inside the slide groove 8 and squeeze the spring 16, thereby opening and limiting its movement.

[0021] The slider 17 is matched with the slide groove 8, which ensures that the slider 17 moves smoothly inside the slide groove 8.

[0022] It should be noted that this utility model only provides one set of openable cylindrical parts, but it is not limited to one set. Multiple sets can also be provided to accommodate bolts that are screwed in to different depths.

[0023] The bottom of the limiting plate 13 is provided with a third magnetic surface, and the inner wall of the circular groove 11 is provided with a fourth magnetic surface that attracts the third magnetic surface. This arrangement allows the cylindrical block 14 to enter the circular groove 11 and be fixed by the attraction between the third and fourth magnetic surfaces when the limiting plate 13 moves the cylindrical block 14.

[0024] In order to make the first, second, third, and fourth magnetic surfaces have high resistance to high temperature, corrosion and demagnetization, high-temperature neodymium iron boron (NdFeB) magnets are preferred. This is existing technology and will not be elaborated on here.

[0025] Spring 16 is made of high-temperature alloy to achieve high temperature resistance.

[0026] The bottom of the third screw 6 is equipped with a pressure plate (not shown in the figure). The pressure plate is provided with an anti-slip surface. The pressure plate will not damage the terminals. At the same time, the anti-slip surface can improve the friction and prevent loosening.

[0027] The diameter of the cylindrical block 14 matches the through hole 7. Matching means that the cylindrical block 14 can not only move inside the through hole 7, but also the distance between it and the sector block 9 can meet the requirements of repulsive force.

[0028] The working principle of this utility model is as follows: During installation, the hexagonal head is tightened with a tool, and the threaded part of the bolt is screwed into the threaded hole of the compressor terminal. The tightening force presses the grounding wire terminal between the terminal 2 and the bolt head (or washer). Then, the limiting plate 13 drives the movable rod 12 to press down. The cylindrical block 14 at its bottom moves inside the through hole 7 to the center of the four sector blocks 9 of the second screw 5. The second magnetic surface of the cylindrical block 14 and the first magnetic surface of the inner wall of each sector block 9 generate a continuous mutual repulsive force. The action of this repulsive force forces the four sector blocks 9 to open outward through the elastic moving component, so that the end face of the sector block 9 is tightly attached to the surface of the mounting base for limiting and preventing the bolt from rotating in the opposite direction and loosening.

[0029] The above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. Structures, devices, and operating methods not specifically described or explained in this utility model, unless otherwise specified or limited, shall be implemented using conventional methods in the field.

Claims

1. A compressor grounding terminal anti-loosening bolt with self-locking thread, comprising a compressor body (1), wherein the compressor body (1) is provided with three terminals (2), each of the terminals (2) being connected to an external wire via a bolt; Its features are: The bolt is composed of a hexagonal head (3), a first screw (4), a second screw (5), and a third screw (6). The first screw (4), the second screw (5), and the third screw (6) are all provided with interconnected through holes (7). The bottom of the first screw (4) and the top of the third screw (6) are provided with four sliding grooves (8). Each sliding groove (8) is provided with an elastic moving component. The second screw (5) is composed of four sector blocks (9). The top and bottom of each sector block (9) are connected to a set of elastic moving components. Each sector block (9) is provided with a first magnetic surface on its inner wall. The hexagonal head (3) has a circular groove (11), and the inner wall of the bottom of the circular groove (11) has a movable hole that communicates with the through hole (7). A movable rod (12) is provided inside the movable hole. A limit plate (13) is provided at the top of the movable rod (12). A cylindrical block (14) is provided at the bottom of the movable rod (12). A second magnetic surface that repels the first magnetic surface is provided on the outside of the cylindrical block (14).

2. The anti-loosening bolt for compressor grounding terminal with self-locking thread according to claim 1, characterized in that: The first screw (4), the second screw (5) and the third screw (6) are provided with intermeshing threads.

3. The anti-loosening bolt for compressor grounding terminal with self-locking thread according to claim 1, characterized in that: The elastic moving component includes a fixed shaft (15) disposed inside the slide groove (8), a spring (16) and a slider (17) are sleeved on the fixed shaft (15), one side of the slider (17) is connected to the spring (16), and the surface of the slider (17) is connected to the sector block (9).

4. The anti-loosening bolt for the compressor grounding terminal with self-locking threads according to claim 3, characterized in that: The slider (17) matches the groove (8).

5. A compressor grounding terminal anti-loosening bolt with self-locking threads according to claim 1, characterized in that: The bottom of the limiting disk (13) is provided with a third magnetic surface, and the inner wall of the circular groove (11) is provided with a fourth magnetic surface that attracts the third magnetic surface.

6. A compressor grounding terminal anti-loosening bolt with self-locking threads according to claim 1, characterized in that: The bottom of the third screw (6) is equipped with a pressure plate, and the pressure plate is provided with an anti-slip surface.

7. A compressor grounding terminal anti-loosening bolt with self-locking threads according to claim 1, characterized in that: The diameter of the cylindrical block (14) matches the diameter of the through hole (7).

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