Main control box based on industrial control

Abstract

The invention relates to the technical field of control boxes, and discloses a main control box based on industrial control, which comprises a box body, an aviation socket arranged on one side of the box body, jacks annularly formed in the aviation socket, contacts arranged in the jacks, mounting seats arranged in the jacks, contacts arranged at the top of the mounting seats, and plugs arranged on the aviation socket, the plug is arranged in the box body, the contact pins are arranged on the plug, the devices are arranged in the box body, and the cleaning component is arranged in the jack. When the cleaning part works, extra power is not needed, the contact pin cleaning part is driven to rotate along the spiral hole through mechanical thrust generated when the plug is plugged in and pulled out, linear motion is converted into rotary scraping, cleaning while plugging is achieved, and the problems of energy consumption and structure complexity of a traditional active cleaning scheme are solved. By scraping dust and an oxide layer in real time, the fluctuation of contact resistance can be effectively controlled, and compared with a traditional aviation socket, the electric conduction loss and the heating risk are remarkably reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of control boxes, and particularly to a main control box based on industrial control. Background Art

[0002] In the field of industrial control, the connection between the main control box and external power sources or devices through aviation sockets is a core link, and its connection stability directly affects the reliability of system operation. However, when existing aviation sockets are used in long-term plugging and unplugging or harsh environments (such as dust, humidity, vibration), pollutants such as dust, oil stains, and oxide layers are likely to accumulate on the surfaces of the pins (male ends) and contacts (female ends), resulting in an increase in contact resistance, a decrease in electrical conductivity, and even faults such as intermittent power outages and misoperations of equipment. Traditional solutions rely on sealing rings for dust prevention or manual cleaning at regular intervals. The former cannot remove the attached pollutants, and the latter has high maintenance costs and low efficiency in scenarios where the equipment is installed in a concealed manner or used frequently; while active cleaning solutions (such as motor-driven) have problems such as complex structures, high energy consumption, and insufficient reliability. Therefore, there is an urgent need for a self-maintenance technology that requires no additional power, can automatically remove pollutants on both contact surfaces during the plugging and unplugging process, and does not affect the electrical conductivity, so as to meet the stringent requirements of industrial control for highly reliable connections. Summary of the Invention

[0003] In view of the problems existing in the prior art that when the aviation socket of the main control box is used in long-term plugging and unplugging or harsh environments, pollutants such as dust, oil stains, and oxide layers are likely to accumulate on the surfaces of the pins and contacts, resulting in an increase in contact resistance, a decrease in electrical conductivity, and even faults such as intermittent power outages and misoperations of equipment, a main control box based on industrial control is proposed.

[0004] Its purpose is to meet the stringent requirements of industrial control for highly reliable connections through a self-maintenance technology that requires no additional power, can automatically remove pollutants on both contact surfaces during the plugging and unplugging process, and does not affect the electrical conductivity.

[0005] The technical solution of the present invention is a main control box based on industrial control, including a box body, an aviation socket arranged on one side of the box body, jacks annularly opened on the aviation socket, contacts arranged in the jacks, mounting seats arranged inside the jacks, the contacts being arranged on the tops of the mounting seats, plugs arranged on the aviation socket, pins arranged on the plugs, and various devices arranged inside the box body, and further including a cleaning component arranged inside the jacks; The cleaning component includes a pin cleaning component and a contact cleaning component arranged in the jacks, and a synchronization component arranged between the pin cleaning component and the contact cleaning component; The pin cleaning component includes a fixed post disposed in the jack, a fixed ring disposed at the top of the fixed post, the fixed ring being fixed on the aviation socket, two spiral holes formed in the fixed post in an annular array, a spring disposed at the bottom of the fixed ring, a pulling ring disposed at the bottom of the spring, a rotating ring rotatably limited at the bottom of the pulling ring, two limiting blocks slidably limited at the bottom of the rotating ring, a pin cleaning member rotatably limited inside the limiting block, and the pin cleaning member being slidably disposed in the corresponding spiral hole; The contact cleaning component includes a rotating seat rotatably limited at the top of the mounting base, two moving blocks slidably limited at the top of the rotating seat, two contact cleaning members respectively disposed on the opposite sides of the moving blocks facing each other, and a rotating hole formed between the mounting base and the fixed post.

[0006] Further, the pin cleaning member includes a rotating post rotatably limited inside the limiting block, a pin scraping plate disposed on one side of the rotating post, and an abutting surface formed at the top of the pin scraping plate.

[0007] Further, in the initial state, the side of the top of the pin scraping plate is in contact with the bottom of the pin, and the abutting surface is in a horizontal state.

[0008] Further, the contact cleaning member and the pin cleaning member are in a symmetrical state, and the side of the bottom of the contact cleaning member is in contact with the top of the contact.

[0009] Further, the synchronization component includes synchronization rods symmetrically disposed on both sides of the rotating ring, limiting rods disposed on both sides of the rotating seat, and the synchronization rods being slidably limited in the limiting rods.

[0010] Further, the cleaning component further includes a contraction component, and the contraction component includes an extrusion surface formed at the top of the pin scraping plate and on one side of the abutting surface, a torsion spring disposed between the rotating post and the limiting block, a deflection rod disposed at the bottom of the pin scraping plate, a deflection groove formed at the top of the contact cleaning member and matching the size of the deflection rod, and the notch of the deflection groove corresponding to the bottom of the deflection rod in the vertical direction, the deflection groove being inclined, a moving hole formed at the end of the spiral hole for the limiting block to move and contract, and contraction grooves formed at both sides of the bottom of the jack for the limiting block and the moving block to be limited and contract and move.

[0011] Further, the lengths of the limiting block and the moving block in the horizontal and vertical directions are respectively greater than the lengths of the pin cleaning member and the contact cleaning member.

[0012] Further, the limiting block and the moving block are in the same vertical direction, and the number of turns of the spiral coil of the spiral hole is one turn.

[0013] Compared with the prior art, the present invention has the following beneficial effects: 1. When the cleaning component is working, no additional power is required. By utilizing the mechanical thrust during the plugging and unplugging of the plug (the pin squeezing the pin cleaning part), the pin cleaning part is driven to rotate along the spiral hole, converting linear motion into rotational scraping, achieving "cleaning upon insertion" and avoiding the energy consumption and structural complexity problems of traditional active cleaning solutions (such as motor drive). By scraping off dust and oxide layers (such as verdigris and silver sulfide) in real time, the fluctuation of the contact resistance can be effectively controlled. Compared with traditional aviation sockets, the conductive loss and heat generation risk are significantly reduced.

[0014] 2. The automatic yielding design avoids obstruction during the contact connection between the pin and the contact by the cleaning component, ensuring that the pin and the contact can make close and stable contact, thus guaranteeing good electrical conductivity. After the cleaning component shrinks, the connection process between the pin and the contact is smoother, reducing the possible connection looseness or instability caused by the presence of the cleaning component, effectively reducing the probability of faults, and improving the reliability and stability of the system.

[0015] 3. After cleaning, the scraper will automatically retract to the bottom of the jack, without affecting the direct contact between the pin and the contact, and avoiding long-term frictional damage to the surface coating. When the plug is unplugged, the scraper will automatically reset, ready for the next cleaning. This not only ensures the cleaning effect but also enables the plug and the aviation socket to be used for a longer time, making it suitable for industrial scenarios that require frequent plugging and unplugging. Description of the Drawings

[0016] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the box body of the present invention; Figure 2 It is a schematic diagram of the overall structure of the plug of the present invention; Figure 3 It is a schematic diagram of the overall structure of the aviation socket of the present invention; Figure 4 It is a schematic diagram of the overall structure of the cleaning component of the present invention; Figure 5 It is a schematic diagram of the overall disassembled structure of the cleaning component of the present invention; Figure 6 It is a schematic diagram of the disassembled structure of the pin cleaning component, the contact cleaning component and the synchronization component of the present invention; Figure 7 It is a partial three-dimensional structure schematic diagram of the pin cleaning component of the present invention; Figure 8 It is a schematic diagram of the positional relationship structure between the pin cleaning part and the contact cleaning part of the present invention; Figure 9 It is an enlarged three-dimensional structure schematic diagram of the pin cleaning part and the contact cleaning part of the present invention; Figure 10 It is a three-dimensional structure schematic diagram of the contraction component of the present invention; Figure 11Schematic diagram of the enlarged structure of the deflection slot of the present invention; Figure 12 Schematic diagram of the overall exploded structure of the contact cleaning component of the present invention; Figure 13 Front sectional view structure diagram of the jack of the present invention; Figure 14 For the present invention Figure 13 Enlarged structure diagram at position A in

[0017] In the figure: 1. Box body; 11. Aviation socket; 12. Contact; 13. Mounting seat; 14. Plug; 15. Pin; 2. Pin cleaning component; 21. Fixed column; 22. Fixed ring; 23. Spiral hole; 24. Spring; 25. Pulling ring; 26. Rotating ring; 27. Limiting block; 28. Pin cleaning part; 281. Rotating column; 282. Pin scraping plate; 283. Contact surface; 3. Contact cleaning component; 31. Rotating seat; 32. Moving block; 33. Contact cleaning part; 34. Rotating hole; 4. Synchronization component; 41. Synchronization rod; 42. Limiting rod; 5. Shrinking component; 51. Extrusion surface; 52. Deflection rod; 53. Deflection slot; 54. Moving hole; 55. Shrinking slot. Detailed implementation manners

[0018] In order to make the above objects, features and advantages of the present invention more obvious and understandable, the following detailed description of the specific implementation manners of the present invention will be made with reference to the accompanying drawings of the specification.

[0019] Example 1, referring to Figures 1-14, which is the first embodiment of the present invention, provides a main control box based on industrial control, including a box body 1, an aviation socket 11 fixed on one side of the box body 1, jacks annularly opened on the aviation socket 11, contacts 12 installed in the jacks, a mounting seat 13 installed inside the jacks, the contacts 12 being installed on the top of the mounting seat 13, a plug 14 plugged on the aviation socket 11, pins 15 installed on the plug 14, and various devices installed inside the box body 1. It further includes a cleaning component installed inside the jacks; the cleaning component includes a pin cleaning assembly 2 and a contact cleaning assembly 3 installed in the jacks, and a synchronization component 4 installed between the pin cleaning assembly 2 and the contact cleaning assembly 3; the pin cleaning assembly 2 includes a fixed column 21 installed in the jacks, a fixed ring 22 fixedly connected to the top of the fixed column 21, the fixed ring 22 being fixed on the aviation socket 11, two spiral holes 23 annularly arrayed on the fixed column 21, a spring 24 fixedly connected to the bottom of the fixed ring 22, a pulling ring 25 fixedly connected to the bottom of the spring 24, a rotating ring 26 rotatably limited at the bottom of the pulling ring 25, two limiting blocks 27 slidably limited at the bottom of the rotating ring 26, a pin cleaning member 28 rotatably limited inside the limiting blocks 27, and the pin cleaning member 28 being slidably connected in the corresponding spiral holes 23; the contact cleaning assembly 3 includes a rotating seat 31 rotatably limited on the top of the mounting seat 13, two moving blocks 32 slidably limited on the top of the rotating seat 31, two contact cleaning members 33 respectively fixedly connected to the opposite sides of the moving blocks 32, and a rotating hole 34 opened between the mounting seat 13 and the fixed column 21. It should be noted that in order to improve conductivity and durability, the surfaces of the pins 15 and the contacts 12 are both plated with coatings such as palladium alloy. The material hardness of the pin cleaning member 28 and the contact cleaning member 33 in the cleaning component is not higher than the hardness of the coating. In order to avoid wearing the coating during the rotating scraping process, materials with low hardness and wear resistance, such as beryllium bronze plated with soft gold or conductive polymers, can be selected.

[0020] Specifically, when the main control box is externally powered through the five-core aviation socket 11, the five-core aviation plug 14 is inserted into the aviation socket 11 to provide a stable 380V voltage for the device equipment inside the main control box; when the pin 15 is inserted into the corresponding jack, one end of the pin 15 squeezes and pushes two pin cleaning parts 28, causing the pin cleaning parts 28 to rotate along the spiral hole 23. During the insertion process of the pin 15, the two pin cleaning parts 28 rotate and scrape the bottom surface of the pin 15, scraping off the dust, oxide layer or debris accumulated on the bottom surface of the pin 15. At the same time, through the set synchronization component 4, the pin cleaning component 2 drives the contact cleaning component 3 to rotate and clean the top surface of the contact 12 in the rotation hole 34 while rotating and scraping, so that the pin 15 and the contact 12 are rotated and cleaned once before and after each power-on, avoiding the problems that the contact resistance of the aviation plug 14 and the aviation socket 11 increases, the conductivity decreases, the plugging and unplugging is abnormal, and even the circuit fails due to the stubborn adhesion of dust and debris caused by long-term plugging and unplugging or placement, improving the power connection stability, and reducing the possibility of safety accidents.

[0021] When the cleaning component is working, no additional power is required. It uses the mechanical thrust during the plugging and unplugging of the plug 14 (the pin 15 squeezes the pin cleaning part 28) to drive the pin cleaning part 28 to rotate along the spiral hole 23, converting the linear motion into rotational scraping, achieving "cleaning while plugging", and avoiding the energy consumption and structural complexity problems of traditional active cleaning solutions (such as motor drive). By scraping off dust and oxide layers (such as copper green, silver sulfide) in real time, the fluctuation of the contact resistance can be effectively controlled. Compared with the traditional aviation socket 11, the conductive loss and the risk of heat generation are significantly reduced. In addition, it also has the effect of resisting environmental interference, is more adaptable to harsh environments such as dust (such as metal processing workshops) and humidity (such as offshore platforms), avoiding intermittent power outages or signal attenuation caused by the accumulation of pollutants, and is especially suitable for scenarios with extremely high requirements for power stability in industrial control (such as power supply for PLC and relay modules). In addition, it can reduce manual intervention and does not require regular disassembly and cleaning, especially suitable for equipment with hidden installation positions (such as the main control box inside large machinery), reducing the maintenance cost.

[0022] Refer to Figures 8-10 As shown, the pin cleaning part 28 includes a rotating column 281 that is limited and rotates inside the limiting block 27, a pin scraping plate 282 fixedly connected to one side of the rotating column 281, and an abutting surface 283 opened on the top of the pin scraping plate 282.

[0023] Specifically, when the pin 15 is inserted, it will squeeze the pin scraping plate 282. The pin scraping plate 282 synchronously presses down the limiting block 27 through the rotating column 281. The limiting block 27 presses down the rotating ring 26. The rotating ring 26 synchronously pulls down the pulling ring 25. The pulling ring 25 stretches the spring 24. When the pin scraping plate 282 rotates along the spiral hole 23, it will drive the rotating ring 26 to rotate through the rotating column 281 and the limiting block 27, achieving the purpose of rotating and scraping the bottom surface of the pin 15 for cleaning.

[0024] Refer to Figures 8-9 , in the initial state, the side of the top of the pin scraping plate 282 is in contact with the bottom of the pin 15, and the abutting surface 283 is in a horizontal state.

[0025] Specifically, such a setting facilitates the stable and sufficient contact between one side of the pin scraping plate 282 and the bottom surface of the pin 15, improving the cleaning effect during rotation.

[0026] Refer to Figure 6 and Figures 8-9 , the contact cleaning member 33 and the pin cleaning member 28 are in a symmetrical state, and the side of the bottom of the contact cleaning member 33 is in contact with the top of the contact 12.

[0027] Specifically, the contact cleaning member 33 can be obtained by symmetrically setting the pin cleaning member 28. Through the synchronization component 4, a synchronous two-way cleaning effect can be achieved. The synchronization component 4 (linkage of the rotating hole 34) enables the pin cleaning component 2 and the contact cleaning component 3 to act synchronously. When the pin 15 is inserted, the bottom surface (male end) of the pin 15 and the top surface (female end) of the contact 12 are simultaneously scraped, covering the pollution risk of the double contact surfaces and improving the cleaning efficiency.

[0028] Embodiment 2, refer to Figure 6 , which is the second embodiment of the present invention. The difference between this embodiment and the first embodiment is that the synchronization component 4 includes synchronous rods 41 symmetrically and fixedly connected to both sides of the rotating ring 26, and limiting rods 42 fixedly connected to both sides of the rotating seat 31. The synchronous rods 41 are limited and slide within the limiting rods 42.

[0029] Specifically, when the rotating ring 26 rotates, the synchronous rods 41 on both sides rotate and drive the limiting rods 42 to rotate synchronously, so that the rotating seat 31 rotates synchronously, enabling the pin scraper 282 and the contact cleaning member 33 to respectively and simultaneously rotate and clean the contact surfaces between the pins 15 and the contacts 12. Their cleaning effects cooperate with each other. Due to synchronous cleaning, the dust, oxide layers or debris on the pins 15 and the contacts 12 can be scraped off at the same time. The two cooperate with each other to complete the cleaning work more comprehensively and thoroughly. For example, for some cross-contamination caused by the contact between the pins 15 and the contacts 12, synchronous cleaning can better handle it, so that the entire contact area can be well cleaned, further ensuring the electrical conductivity between the plug 14 and the aviation socket 11 and enhancing the electrical conductivity stability. Moreover, the designs of the synchronous rod 41 and the limiting rod 42 are relatively simple, without complex transmission mechanisms or electronic components. This simple structure reduces the number of parts, lowers the manufacturing difficulty and cost, and also reduces the possibility of failures. In practical applications, the simple structure is easier to maintain and repair, improving the maintainability of the device. The remaining structure is the same as that of Embodiment 1.

[0030] Embodiment 3, referring to Figures 8-11 , which is the third embodiment of the present invention. The difference between this embodiment and the second embodiment is that the cleaning component further includes a contraction assembly 5. The contraction assembly 5 includes an extrusion surface 51 opened at the top of the pin scraper 282 and located on one side of the abutting surface 283, a torsion spring (not shown in the figure) abutted between the rotating column 281 and the limiting block 27, a deflection rod 52 fixedly connected to the bottom of the pin scraper 282, a deflection groove 53 opened at the top of the contact cleaning member 33 and matching the size of the deflection rod 52, and the notch of the deflection groove 53 corresponds to the bottom of the deflection rod 52 in the vertical direction. The deflection groove 53 is inclined, a moving hole 54 opened at the end of the spiral hole 23 for the limiting block 27 to move and contract, and contraction grooves 55 opened on both sides of the bottom of the jack for the limiting block 27 and the moving block 32 to limit and contract and move.

[0031] Specifically, when the pin cleaning piece 28 and the contact cleaning piece 33 are in contact, the deflection rod 52 is inserted into the deflection groove 53, causing the pin scraper 282 to deflect, thereby causing the pin 15 to act on the inclined extrusion surface 51, causing the pin scraper 282 to be squeezed and contracted to move, and because the deflection rod 52 is inserted into the deflection groove 53, a synchronous limiting effect is formed, so that the pin cleaning piece 28 synchronously drives the contact cleaning piece 33 to move into the contraction groove 55 inside the socket, so that it can automatically contract after the cleaning effect is achieved, so as to avoid affecting the contact and connection between the pin 15 and the contact 12. Such an automatic yielding design avoids the cleaning component from causing obstruction when the pin 15 and the contact 12 are in contact and connected, ensuring that the pin 15 and the contact 12 can be in close and stable contact, thereby ensuring good conductive performance. After the cleaning component is retracted, the connection process between the pin 15 and the contact 12 is smoother, reducing the loose or unstable connection caused by the presence of the cleaning component, effectively reducing the probability of failure, and improving the reliability and stability of the system. In addition, the design of the retracting component 5 allows the cleaning component to be retracted into the socket when not working, effectively utilizing the space in the socket and improving the compactness of the entire aviation socket 11 structure. In equipment such as industrial control main control boxes, the space is usually limited, and the compact structural design helps to reduce the size of the equipment, improve the integration of the equipment, and make the equipment more compact and lightweight.

[0032] Reference Figures 8-10 The lengths of the limit block 27 and the moving block 32 in the horizontal and vertical directions are respectively greater than the lengths of the pin cleaning piece 28 and the contact cleaning piece 33.

[0033] Specifically, the pin cleaning member 28 and the contact cleaning member 33 can be retracted into the retraction groove 55 without being blocked.

[0034] Reference Figures 4-5 and Figure 12 The limit block 27 and the moving block 32 are located in the same vertical direction, and the number of spiral coils of the spiral hole 23 is one circle.

[0035] Specifically, such an arrangement not only allows the contact 12 and the pin 15 to be completely wiped, but also allows the triggering and retracting assembly 5 to be ready after the wipes to achieve retraction after cleaning. The remaining structure is the same as that of the second embodiment.

[0036] Based on the embodiments 1-3, the working principle of the present invention is as follows: when the plug 14 is inserted, the pin 15 squeezes the cleaning scraper, causing it to rotate along the spiral hole 23 of the fixed column 21, and synchronously scrapes the bottom surface of the pin 15 and the top surface of the contact 12 to remove dust and oxide layers. The synchronization rod 41 and the limit rod 42 are linked to ensure that the two-way cleaning is carried out synchronously to avoid contamination residue on a single contact surface. After being plugged in place, the inclined deflection groove 53 deflects the pin scraper 282, and the extrusion surface 51 is squeezed down so that the pin scraper 282 drives the contact cleaning piece 33 to move synchronously to the contraction groove 55 at the bottom of the jack, automatically withdrawing from the contact area, and avoiding interference with the direct conduction between the pin 15 and the contact 12. When pulled out, the torsion spring resets the cleaning piece to the initial state. The entire process is driven by the mechanical force of plugging and unplugging, without the need for additional power. Through spiral track cleaning, synchronous linkage and adaptive contraction, the self-maintenance function of "cleaning when plugged in, giving way when in place" is realized, which improves the connection stability in harsh environments, reduces manual maintenance, and adapts to the high reliability requirements of industrial control.

[0037] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A main control box based on industrial control, comprising a box body, an aviation socket arranged on one side of the box body, a jack arranged in a ring shape on the aviation socket, a contact arranged in the jack, a mounting seat arranged inside the jack, a contact arranged on the top of the mounting seat, a plug arranged on the aviation socket, a pin arranged on the plug, and various devices arranged inside the box body, characterized in that: Also included is a cleaning component disposed inside the socket; The cleaning component includes a pin cleaning component and a contact cleaning component arranged in the jack, and a synchronization component arranged between the pin cleaning component and the contact cleaning component; The pin cleaning assembly includes a fixed column arranged in the socket, a fixed ring arranged on the top of the fixed column, the fixed ring is fixed on the aviation socket, two spiral holes are arranged in an annular array on the fixed column, a spring is arranged at the bottom of the fixed ring, a pulling ring is arranged at the bottom of the spring, a rotating ring limitedly rotated at the bottom of the pulling ring, two limiting blocks limitedly sliding at the bottom of the rotating ring, a pin cleaning piece limitedly rotated inside the limiting blocks, and the pin cleaning piece is slidably arranged in the corresponding spiral holes; The contact cleaning assembly includes a rotating seat that is limited to rotate on the top of the mounting seat, two moving blocks that are limited to slide on the top of the rotating seat, two contact cleaning pieces that are respectively arranged on the opposite sides of the moving blocks, and a rotating hole opened between the mounting seat and the fixed column.

2. The main control box based on industrial control according to claim 1 is characterized in that: The pin cleaning member comprises a rotating column which is limitedly rotated inside the limiting block, a pin scraper arranged on one side of the rotating column, and an abutting surface which is arranged on the top of the pin scraper.

3. The main control box based on industrial control according to claim 2 is characterized in that: In the initial state, the side of the top of the pin scraper is in contact with the bottom of the pin, and the abutting surface is in a horizontal state.

4. The main control box based on industrial control according to claim 1 is characterized in that: The contact cleaning piece and the pin cleaning piece are in a symmetrical state, and the side of the bottom of the contact cleaning piece is in contact with the top of the contact.

5. The main control box based on industrial control according to claim 1 is characterized in that: The synchronization component comprises synchronization rods symmetrically arranged on both sides of the rotating ring and limiting rods arranged on both sides of the rotating seat, and the synchronization rods are limited and slidable in the limiting rods.

6. The main control box based on industrial control according to claim 1 is characterized in that: The cleaning component also includes a retraction component, which includes an extrusion surface opened at the top of the pin scraper and located on one side of the abutment surface, a torsion spring arranged between the rotating column and the limit block, a deflection rod arranged at the bottom of the pin scraper, a deflection groove opened at the top of the contact cleaning piece and matching the size of the deflection rod, and the notch of the deflection groove corresponds to the bottom of the deflection rod in the vertical direction, the deflection groove is inclined, a moving hole opened at the end of the spiral hole for the limit block to move and retract, and retraction grooves opened on both sides of the bottom of the jack for the limit block and the moving block to limit and retract.

7. The main control box based on industrial control according to claim 6 is characterized in that: The lengths of the limit block and the moving block in the horizontal and vertical directions are respectively greater than the lengths of the pin cleaning piece and the contact cleaning piece.

8. The main control box based on industrial control according to claim 7 is characterized in that: The limit block and the moving block are located in the same vertical direction, and the number of spiral coils of the spiral hole is one circle.

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