Vehicle socket box for easy access

Abstract

The present invention relates to the technical field of socket connection, and discloses a vehicle socket box that is easy to inspect and repair, comprising a box body and a box door, a socket is fixedly installed on the front of the box door, a mechanical interlocking assembly is arranged on the inner side of the box door, and the mechanical interlocking assembly comprises a gear, a tooth plate, a limit pin and a transmission shaft, wherein the gear is fixedly installed on the surface of a hexagonal shaft, the tooth plate is slidably installed on the inner side of the box door, the gear and the tooth plate are meshed and transmitted, the limit pin and the transmission shaft are both slidably installed in the socket, the surfaces of the limit pin and the transmission shaft are both sleeved with compression springs, the rear end of the transmission shaft is fixedly installed with a limit disk, and the lower surface of the tooth plate is provided with a limit groove. The socket box proposed by the present invention has a mechanical interlocking assembly arranged on the inner side of the box door, and the ends of the limit pin and the transmission shaft in the mechanical interlocking assembly are both extended to the outer side of the socket, and by pressing the limit pin and the front end of the transmission shaft outside the box, it can be detected whether the limit pin and the transmission shaft are moving normally, thereby achieving the effect of convenient inspection and repair.

Description

Technical Field

[0001] The invention relates to the technical field of socket connection, in particular to a vehicle socket box which is convenient for maintenance. Background Art

[0002] In a socket box for special aviation vehicles, it is required that the circuit breaker and the connector of each output circuit of the socket box have a mechanical interlocking function to prevent misoperation. In the prior art, a patent document with the announcement number CN108879260A discloses a mechanical interlocking device suitable for plugs and sockets with different currents, including a mounting panel, a socket, an interlocking mechanism, and an actuator. The socket is arranged on the mounting panel. The interlocking mechanism includes a fixed plate, a sliding card rod, and a movable baffle. The fixed plate is provided with a sliding card rod and the sliding card rod can slide left and right on the fixed plate. A limit key is provided at one end of the sliding card rod. The sliding card rod and the actuator are connected to each other. The actuator is linked to the circuit breaker, one end of the movable baffle is arranged on the installation panel, and the other end is arranged at the key slot of the socket, the limit key is arranged on one side of the movable baffle, and a card is also provided on the sliding card rod, and the card is a protruding structure close to the limit key and when the sliding card rod slides to the left, the card can jam the front end of the plug. This scheme realizes the mechanical interlocking function in a way that the card is stuck in the key hole so that the plug cannot be pulled out. The card is easy to deform, and the key hole is easy to be damaged or blocked, resulting in the failure of the interlocking function. In other words, the key hole gap is enlarged due to frequent wear, resulting in the loosening of the plug and the socket, causing failures, and there are many safety hazards.

[0003] Based on the above reasons, the existing mechanical interlocking mechanism of the plug and socket has the operating parts of the mechanical interlocking mechanism placed inside. During the maintenance process, it is inconvenient to check whether the operating parts are normal outside the socket box, which has many safety hazards and needs to be solved urgently. Summary of the invention

[0004] The purpose of the present invention is to solve the problems in the prior art that the mechanical interlocking mechanism of the plug and socket is inconvenient to repair and has poor safety, and to propose a vehicle socket box that is easy to repair.

[0005] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a vehicle socket box that is easy to maintain, including a box body and a box door, a socket is fixedly installed on the front of the box door, a mounting frame is fixedly installed on the inner side of the box door, a circuit breaker is fixedly installed in the mounting frame, a rotating handle is rotatably installed on the front of the box door, a hexagonal shaft is fixedly installed inside the rotating handle, the hexagonal shaft extends into the circuit breaker, and the circuit breaker is controlled to be on or off by rotating the rotating handle.

[0006] A mechanical interlocking assembly is provided on the inner side of the box door, and the mechanical interlocking assembly includes a gear, a tooth plate, a limit pin and a transmission shaft. The gear is fixedly mounted on the surface of the hexagonal shaft, and the tooth plate is slidably mounted on the inner side of the box door. The gear and the tooth plate are meshed for transmission, and the limit pin and the transmission shaft are both slidably mounted in the socket. The surfaces of the limit pin and the transmission shaft are both sleeved with compression springs, and a limit disk is fixedly mounted on the rear end of the transmission shaft. A limit groove is provided on the lower surface of the tooth plate. Under the action of the compression spring, the front end of the limit pin and the transmission shaft extends to the outside of the socket, and the limit disk is inserted into the limit groove. By pressing the limit pin and the front end of the transmission shaft outside the box, it can be detected whether the limit pin and the transmission shaft are operating normally, thereby achieving the effect of convenient maintenance.

[0007] Preferably, a plug is inserted into the socket, and a nut sleeve is rotatably installed at the end of the plug. The nut sleeve is threadedly connected to the external threaded portion of the socket surface, and a slot is provided at the end of the nut sleeve. The front end of the limit pin extends into the slot, and a clearance hole is provided on the surface of the toothed plate. When the limit pin is extended and retracted, the rear end of the limit pin can be inserted into the clearance hole, so that the plug cannot be pulled out when the circuit breaker is closed, thereby avoiding plugging and unplugging the plug while it is energized, and making it safer to use.

[0008] Preferably, a secondary safety component is provided inside the socket, and the secondary safety component includes a connecting plate, a connecting rod and an air sleeve. An open groove is provided on the surface of the transmission shaft, and the air sleeve is movably arranged in the open groove of the transmission shaft. A piston is slidably installed inside the air sleeve, one end of the connecting rod is fixedly connected to the piston, and the other end of the connecting rod is fixedly connected to the inner wall of the open groove of the transmission shaft, one end of the connecting plate is fixedly connected to the limit pin, and the other end of the connecting plate is fixedly connected to the surface of the air sleeve.

[0009] An exhaust channel is arranged inside the limit pin and the connecting plate, the air inlet end of the exhaust channel is connected with the inner cavity of the air sleeve, the air outlet of the exhaust channel is arranged on the surface of the limit pin, and a rubber ring is arranged inside the socket. The limit pin is slidably inserted into the rubber ring so that the rubber ring is wrapped around the air outlet of the exhaust channel. By arranging a secondary insurance component between the limit pin and the transmission shaft, the mechanical interlocking component has a delay, which avoids the circuit breaker being closed immediately when the plug is inserted, reduces the probability of misoperation, and further improves the safety of use.

[0010] Preferably, a mounting block is fixedly installed on the inner side of the box door, four positioning shafts are fixedly installed on the surface of the mounting block, a guide wheel is rotatably installed on the surface of each positioning shaft, a waist-shaped groove is provided on the surface of the tooth plate, and each guide wheel rolls along the waist-shaped groove, and a tension spring is fixedly installed on the end of one of the positioning shafts, and the end of the tension spring away from the positioning shaft is fixedly connected to the tooth plate.

[0011] A baffle is fixedly installed on the lower surface of the mounting block, and the limit pin and the transmission shaft both slide through the baffle. The compression spring includes a first compression spring and a second compression spring. The two ends of the first compression spring respectively press against the limit pin and the baffle, and the two ends of the second compression spring respectively press against the transmission shaft and the baffle, to ensure that the limit pin and the transmission shaft can freely extend and retract, as well as reset.

[0012] Preferably, when no plug is inserted into the socket, the second compression spring presses against the transmission shaft, so that the limit plate is inserted into the limit groove, the rotary handle cannot be rotated due to the constraint of the mechanical interlocking assembly, and the circuit breaker is in a power-off state and cannot be closed; When a plug is inserted into the socket, the plug pushes the transmission shaft to move, so that the limit plate is separated from the limit groove. At the same time, the rear end of the limit pin is inserted into the clearance hole, and the rotating handle is constrained by the mechanical interlocking component and cannot rotate; After the plug is inserted into the socket, during the process of threaded connection between the nut sleeve and the external threaded part of the socket surface, the limit pin retracts and extends to exhaust the exhaust channel, and the front end of the limit pin moves into the slot, and the rotary handle can be rotated to drive the circuit breaker to close and power on; when the circuit breaker is in the open state, the non-yielding hole area of ​​the tooth plate blocks the rear end of the limit pin, and the limit pin cannot retract and extend. The front end of the limit pin limits the rotation of the nut sleeve, so that the plug cannot be pulled out. According to this design, during the maintenance of the mechanical interlocking component, if the plug is not inserted in the socket, only the limit pin is pressed, or only the transmission shaft is pressed, or the limit pin and the transmission shaft are pressed at the same time, the circuit breaker cannot be closed immediately, thereby avoiding the occurrence of accidental closing during maintenance and improving the safety of maintenance work.

[0013] The present invention has the following beneficial effects: 1. The socket box proposed in the present invention has a mechanical interlocking assembly on the inner side of the box door. The end portions of the limit pin and the transmission shaft in the mechanical interlocking assembly extend to the outside of the socket. When the plug is not inserted, the limit pin and the transmission shaft can be easily seen. By pressing the limit pin and the front end of the transmission shaft outside the box, it can be detected whether the limit pin and the transmission shaft are moving normally, thereby achieving the effect of convenient maintenance.

[0014] 2. The socket box proposed in the present invention sets a mechanical interlocking assembly between the socket and the rotating handle for operating the circuit breaker. When the plug is not inserted into the socket, the limit plate constrains the movement of the tooth plate so that the rotating handle cannot be rotated, ensuring that the circuit breaker cannot be closed. When the plug is inserted into the socket and the nut sleeve is threadedly connected to the socket, the circuit breaker can be closed. Since the circuit breaker is in a closed state, the limit pin constrains the rotation of the nut sleeve so that the plug cannot be removed, thereby realizing a mechanical interlocking function between the circuit breaker and the connector to avoid live plugging and unplugging of the plug. This design of preventing live plugging and unplugging of the plug prevents misoperation, provides convenience for line maintenance, and is safer to use.

[0015] 3. The mechanical interlocking assembly proposed in the present invention arranges a secondary safety assembly between the limit pin and the transmission shaft. When the plug is inserted into the socket, the plug pushes the transmission shaft to move inward. Under the action of the secondary safety assembly, the rear end of the limit pin will be inserted into the clearance hole. Although the limit disk is separated from the limit groove, the tooth plate still cannot move, ensuring that the rotary handle cannot be rotated. The rotary handle can be rotated only after the rear end of the limit pin is separated from the clearance hole. This design makes the mechanical interlocking assembly have a delay, avoiding the circuit breaker being closed immediately when the plug is inserted, reducing the probability of misoperation, and further improving the safety of use.

[0016] 4. The mechanical interlocking assembly proposed in the present invention has a delayed function by setting a secondary safety assembly between the limit pin and the transmission shaft. During the maintenance process, only the transmission shaft is pressed to separate the limit plate from the limit groove. However, since the rear end of the limit pin is also inserted into the clearance hole, the tooth plate still cannot move and the circuit breaker cannot be closed, thereby avoiding accidental closing during maintenance and improving the safety of maintenance work. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The three-dimensional structure of the socket box proposed by the present invention is shown in FIG. Figure 1 ; Figure 2 The three-dimensional structure of the socket box proposed by the present invention is shown in FIG. Figure 2 ; Figure 3 for Figure 1 A schematic diagram of the structure enlargement at point A; Figure 4 Schematic diagram of the three-dimensional structure of the tooth plate proposed by the present invention Figure 1 ; Figure 5 Schematic diagram of the three-dimensional structure of the tooth plate proposed by the present invention Figure 2 ; Figure 6 A partial schematic diagram of the side section structure of the box door proposed by the present invention Figure 1 ; Figure 7 A partial schematic diagram of the side section structure of the box door proposed by the present invention Figure 2 ; Figure 8 A partial schematic diagram of the side section structure of the box door proposed by the present invention Figure 3 ; Fig. 9 This is the electrical schematic diagram of the socket box proposed by the present invention.

[0018] In the figure: 1 box body, 2 box door, 3 socket, 4 circuit breaker, 5 rotary handle, 6 hexagonal shaft, 7 gear, 8 tooth plate, 9 limit pin, 10 transmission shaft, 11 limit groove, 12 limit plate, 13 plug, 14 nut sleeve, 15 slot, 16 clearance hole, 17 connecting plate, 18 connecting rod, 19 air sleeve, 20 piston, 21 exhaust channel, 22 rubber ring, 23 mounting block, 24 guide wheel, 25 tension spring, 26 baffle, 27 first compression spring, 28 second compression spring. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0020] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0021] Reference Figure 1-Figure 9 A vehicle socket box which is convenient for maintenance comprises a box body 1 and a box door 2, a socket 3 is fixedly installed on the front of the box door 2, a mounting frame is fixedly installed on the inner side of the box door 2, a circuit breaker 4 is fixedly installed in the mounting frame, a rotating handle 5 is rotatably installed on the front of the box door 2, a hexagonal shaft 6 is fixedly installed inside the rotating handle 5, the hexagonal shaft 6 extends into the circuit breaker 4, and the circuit breaker 4 is controlled to be on or off by rotating the rotating handle 5.

[0022] Among them, Figure 3 , Figure 4 As shown, a mechanical interlocking assembly is arranged on the inner side of the box door 2, and the mechanical interlocking assembly includes a gear 7, a tooth plate 8, a limit pin 9 and a transmission shaft 10. The gear 7 is fixedly mounted on the surface of the hexagonal shaft 6, and the tooth plate 8 is slidably mounted on the inner side of the box door 2. The gear 7 and the tooth plate 8 are meshed for transmission. The limit pin 9 and the transmission shaft 10 are both slidably mounted in the socket 3. The surfaces of the limit pin 9 and the transmission shaft 10 are both sleeved with compression springs. A limit disk 12 is fixedly mounted on the rear end of the transmission shaft 10, and a limit groove 11 is provided on the lower surface of the tooth plate 8. Under the action of the compression spring, the limit pin 9 and the front end of the transmission shaft 10 extend to the outside of the socket 3, and the limit disk 12 is inserted into the limit groove 11.

[0023] Specifically, a mounting block 23 is fixedly installed on the inner side of the box door 2, and four positioning shafts are fixedly installed on the surface of the mounting block 23. A guide wheel 24 is rotatably installed on the surface of each positioning shaft. A waist-shaped groove is opened on the surface of the tooth plate 8, and each guide wheel 24 rolls along the waist-shaped groove. A tension spring 25 is fixedly installed on the end of one of the positioning shafts, and the end of the tension spring 25 away from the positioning shaft is fixedly connected to the tooth plate 8.

[0024] See Figure 6 A baffle 26 is fixedly installed on the lower surface of the mounting block 23, and the limit pin 9 and the transmission shaft 10 both slide through the baffle 26. The compression spring includes a first compression spring 27 and a second compression spring 28. The two ends of the first compression spring 27 respectively press against the limit pin 9 and the baffle 26, and the two ends of the second compression spring 28 respectively press against the transmission shaft 10 and the baffle.

[0025] A clearance hole 16 is formed on the surface of the tooth plate 8 , and when the limit pin 9 is extended and retracted, the rear end of the limit pin 9 can be inserted into the clearance hole 16 .

[0026] like Figure 6 , Figure 7 As shown, a plug 13 is inserted into the socket 3, and a nut sleeve 14 is rotatably installed at the end of the plug 13. The nut sleeve 14 is threadedly connected to the external threaded portion of the surface of the socket 3, and a slot 15 is opened at the end of the nut sleeve 14. Figure 3 As shown, the front end of the limit pin 9 extends into the slot 15, wherein the electrical schematic diagram of the socket 3, the circuit breaker 4 and the plug 13 is as shown in FIG. Fig. 9 shown.

[0027] In this embodiment, reference Figure 8 A secondary insurance component is arranged inside the socket 3, and the secondary insurance component includes a connecting plate 17, a connecting rod 18 and an air sleeve 19. An open groove is opened on the surface of the transmission shaft 10, and the air sleeve 19 is movably arranged in the open groove of the transmission shaft 10. A piston 20 is slidably installed inside the air sleeve 19, one end of the connecting rod 18 is fixedly connected to the piston 20, and the other end of the connecting rod 18 is fixedly connected to the inner wall of the open groove of the transmission shaft 10, one end of the connecting plate 17 is fixedly connected to the limit pin 9, and the other end of the connecting plate 17 is fixedly connected to the surface of the air sleeve 19.

[0028] An exhaust channel 21 is arranged inside the limit pin 9 and the connecting plate 17. The air inlet end of the exhaust channel 21 is connected to the inner cavity of the air sleeve 19. The air outlet of the exhaust channel 21 is arranged on the surface of the limit pin 9. A rubber ring 22 is arranged inside the socket 3. The limit pin 9 is slidably inserted into the rubber ring 22 so that the rubber ring 22 is wrapped around the air outlet of the exhaust channel 21.

[0029] During use, if Figure 6 As shown, when the plug 13 is not inserted into the socket 3, the second compression spring 28 presses against the transmission shaft 10, so that the limit plate 12 is inserted into the limit groove 11, referring to Figure 4 At this time, the tooth plate 8 cannot move to the left or right, the rotary handle 5 cannot be rotated due to the constraint of the mechanical interlocking assembly, and the circuit breaker 4 is in a power-off state and cannot be closed; like Figure 7 As shown, when the plug 13 is inserted into the socket 3, the plug 13 pushes the transmission shaft 10 to move rightward, so that the limiting plate 12 is separated from the limiting groove 11; Due to the presence of secondary insurance components, see Figure 8 , the transmission shaft 10 moves to the right, driving the piston 20 to move and compress the air in the air sleeve 19. The air pressure in the air sleeve 19 increases, causing the air sleeve 19, the connecting plate 17, and the limit pin 9 to move to the right. At the same time, the rear end of the limit pin 9 is inserted into the clearance hole 16. Although the limit plate 12 is separated from the limit groove 11 at this time, the limit pin 9 blocks the movement of the tooth plate 8, so that the tooth plate 8 cannot move to the left or right. The rotating handle 5 is constrained by the mechanical interlocking component and cannot be rotated, and the circuit breaker 4 is in a power-off state. When the plug 13 is inserted into the socket 3, during the process of threading the nut sleeve 14 and the external threaded portion of the socket 3, the nut sleeve 14 is screwed in, pressing the left end of the stop pin 9, referring to Figure 8 , the limit pin 9 moves to the right, when the air outlet of the exhaust channel 21 is separated from the rubber ring 22, the air in the air sleeve 19 is discharged from the exhaust channel 21, the air pressure in the air sleeve 19 is reduced, and under the action of the first compression spring 27, the limit pin 9 moves to the left until the front end of the limit pin 9 moves into the card slot 15, as shown in FIG. Figure 3 As shown; Since the limiting plate 12 is separated from the limiting groove 11, the end of the limiting pin 9 is pulled out from the clearance hole 16. Figure 5 As shown, the tooth plate 8 can move left and right, and the rotary handle 5 can rotate to drive the circuit breaker 4 to close and energize; When the circuit breaker 4 is in the open state, the non-displacement hole 16 area of ​​the tooth plate 8 blocks the rear end of the limit pin 9. Figure 7 , the left end of the limit pin 9 is in a staggered state with the clearance hole 16, the limit pin 9 cannot be extended left and right, and the front end of the limit pin 9 limits the rotation of the nut sleeve 14, so that the plug 13 cannot be pulled out, that is, when the circuit breaker 4 is closed and the circuit is energized, the plug 13 cannot be pulled out; When the plug 13 needs to be unplugged, the rotary handle 5 needs to be rotated in the reverse direction to first cut off the power of the circuit breaker 4. Figure 4 As shown, the limit plate 12 slides into the limit groove 11, the rear end of the limit pin 9 is aligned with the clearance hole 16, the limit pin 9 can be telescopic, and the nut sleeve 14 is screwed out, so that the plug 13 can be pulled out.

[0030] The socket box proposed in the present invention provides a mechanical interlocking component between the socket 3 and the rotating handle 5 for operating the circuit breaker 4. When the plug 13 is not inserted into the socket 3, the limit plate 12 constrains the tooth plate 8 to move, so that the rotating handle 5 cannot rotate, ensuring that the circuit breaker 4 cannot be closed. When the plug 13 is inserted into the socket 3 and the nut sleeve 14 is threadedly connected to the socket 3, the closing operation of the circuit breaker 4 can be performed at this time. Since the circuit breaker 4 is in a closed state, the limit pin 9 constrains the rotation of the nut sleeve 14, so that the plug 13 cannot be removed, thereby realizing a mechanical interlocking function between the circuit breaker 4 and the connector to avoid plugging and unplugging the plug 13 while it is powered on. This design of preventing plugging and unplugging the plug 13 while it is powered on prevents misoperation, provides convenience for line maintenance, and is safer to use.

[0031] By arranging a secondary insurance component between the limit pin 9 and the transmission shaft 10, when the plug 13 is inserted into the socket 3, the plug 13 pushes the transmission shaft 10 to move inward. Under the action of the secondary insurance component, the rear end of the limit pin 9 will be inserted into the clearance hole 16. Although the limit plate 12 is separated from the limit groove 11, the tooth plate 8 still cannot move, ensuring that the rotating handle 5 cannot rotate. The nut sleeve 14 must be installed in place, the air sleeve 19 must be deflated, and the front end of the limit pin 9 must be moved into the card slot 15. Figure 3 As shown, at this time, the rear end of the limit pin 9 is separated from the clearance hole 16, and the rotary handle 5 can be rotated. This design makes the mechanical interlocking component have a delay, avoiding the circuit breaker 4 being closed immediately after the plug 13 is inserted, reducing the probability of misoperation and further improving the safety of use.

[0032] The socket box proposed in the present invention has a mechanical interlocking assembly arranged on the inner side of the box door 2, and the ends of the limit pin 9 and the transmission shaft 10 in the mechanical interlocking assembly extend to the outside of the socket 3. When the plug 13 is not inserted, the ends of the limit pin 9 and the transmission shaft 10 can be easily seen at the socket 3. By pressing the front ends of the limit pin 9 and the transmission shaft 10 outside the box, it can be detected whether the limit pin 9 and the transmission shaft 10 are operating normally, thereby achieving the effect of convenient maintenance.

[0033] By arranging a secondary safety component between the limit pin 9 and the transmission shaft 10, the mechanical interlocking component has a delay. During the maintenance process, only the transmission shaft 10 is pressed to separate the limit plate 12 from the limit groove 11. However, due to the action of the secondary safety component, the rear end of the limit pin 9 is also inserted into the clearance hole 16, the tooth plate 8 still cannot move, and the circuit breaker 4 cannot be closed. Therefore, during the maintenance process, only the limit pin 9 is pressed, or only the transmission shaft 10 is pressed, or the limit pin 9 and the transmission shaft 10 are pressed at the same time, the circuit breaker 4 cannot be closed immediately, thereby avoiding the occurrence of accidental closing during maintenance and improving the safety of maintenance work.

[0034] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A vehicle socket box that is easy to maintain, comprising a box body (1) and a box door (2), characterized in that: A socket (3) is fixedly mounted on the front of the box door (2), a mounting frame is fixedly mounted on the inner side of the box door (2), a circuit breaker (4) is fixedly mounted inside the mounting frame, a rotary handle (5) is rotatably mounted on the front of the box door (2), a hexagonal shaft (6) is fixedly mounted inside the rotary handle (5), the hexagonal shaft (6) extends into the circuit breaker (4), and the circuit breaker (4) is controlled to be on or off by rotating the rotary handle (5); A mechanical interlocking assembly is arranged on the inner side of the box door (2), and the mechanical interlocking assembly comprises a gear (7), a tooth plate (8), a limit pin (9) and a transmission shaft (10). The gear (7) is fixedly mounted on the surface of the hexagonal shaft (6), the tooth plate (8) is slidably mounted on the inner side of the box door (2), the gear (7) and the tooth plate (8) are meshed for transmission, the limit pin (9) and the transmission shaft (10) are both slidably mounted in the socket (3), the surfaces of the limit pin (9) and the transmission shaft (10) are both sleeved with a compression spring, the rear end of the transmission shaft (10) is fixedly mounted with a limit plate (12), the lower surface of the tooth plate (8) is provided with a limit groove (11), under the action of the compression spring, the front ends of the limit pin (9) and the transmission shaft (10) extend to the outside of the socket (3), and the limit plate (12) is inserted into the limit groove (11).

2. The vehicle socket box that is easy to maintain according to claim 1 is characterized in that: A plug (13) is inserted into the socket (3), a nut sleeve (14) is rotatably mounted on the end of the plug (13), the nut sleeve (14) is threadedly connected to an external threaded portion on the surface of the socket (3), a slot (15) is formed at the end of the nut sleeve (14), and a front end of the limit pin (9) extends into the slot (15).

3. The vehicle socket box that is easy to maintain according to claim 2 is characterized in that: A clearance hole (16) is provided on the surface of the tooth plate (8), and when the limit pin (9) is extended and retracted, the rear end of the limit pin (9) can be inserted into the clearance hole (16).

4. The vehicle socket box for easy maintenance according to claim 3, characterized in that: A secondary insurance component is arranged inside the socket (3), and the secondary insurance component comprises a connecting plate (17), a connecting rod (18) and an air sleeve (19); an open groove is provided on the surface of the transmission shaft (10); the air sleeve (19) is movably arranged in the open groove of the transmission shaft (10); a piston (20) is slidably mounted inside the air sleeve (19); one end of the connecting rod (18) is fixedly connected to the piston (20); the other end of the connecting rod (18) is fixedly connected to the inner wall of the open groove of the transmission shaft (10); one end of the connecting plate (17) is fixedly connected to the limit pin (9); and the other end of the connecting plate (17) is fixedly connected to the surface of the air sleeve (19).

5. The vehicle socket box for easy maintenance according to claim 4, characterized in that: An exhaust channel (21) is provided inside the limit pin (9) and the connecting plate (17); an air inlet end of the exhaust channel (21) is communicated with the inner cavity of the air sleeve (19); an air outlet of the exhaust channel (21) is provided on the surface of the limit pin (9); a rubber ring (22) is provided inside the socket (3); the limit pin (9) is slidably inserted into the rubber ring (22) so that the rubber ring (22) is wrapped around the air outlet of the exhaust channel (21).

6. The vehicle socket box for easy maintenance according to claim 5, characterized in that: A mounting block (23) is fixedly mounted on the inner side of the box door (2), and four positioning shafts are fixedly mounted on the surface of the mounting block (23). A guide wheel (24) is rotatably mounted on the surface of each positioning shaft. A waist-shaped groove is provided on the surface of the toothed plate (8), and each guide wheel (24) rolls along the waist-shaped groove. A tension spring (25) is fixedly mounted on the end of one of the positioning shafts, and the end of the tension spring (25) away from the positioning shaft is fixedly connected to the toothed plate (8).

7. The vehicle socket box for easy maintenance according to claim 6, characterized in that: A baffle (26) is fixedly mounted on the lower surface of the mounting block (23); the limit pin (9) and the transmission shaft (10) both slide through the baffle (26); the compression spring comprises a first compression spring (27) and a second compression spring (28); two ends of the first compression spring (27) respectively press against the limit pin (9) and the baffle (26); and two ends of the second compression spring (28) respectively press against the transmission shaft (10) and the baffle (26).

8. The vehicle socket box for easy maintenance according to claim 7, characterized in that: When the plug (13) is not inserted into the socket (3), the second compression spring (28) presses against the transmission shaft (10), so that the limit plate (12) is inserted into the limit groove (11), the rotary handle (5) is constrained by the mechanical interlocking component and cannot be rotated, and the circuit breaker (4) is in a power-off state and cannot be closed.

9. The vehicle socket box for easy maintenance according to claim 7, characterized in that: When the plug (13) is inserted into the socket (3), the plug (13) pushes the transmission shaft (10) to move, so that the limit plate (12) is separated from the limit groove (11). At the same time, the rear end of the limit pin (9) is inserted into the clearance hole (16), and the rotating handle (5) is constrained by the mechanical interlocking component and cannot rotate.

10. The vehicle socket box for easy maintenance according to claim 9, characterized in that: After the plug (13) is inserted into the socket (3), during the process of the nut sleeve (14) being threadedly connected to the external threaded portion of the surface of the socket (3), the limit pin (9) moves in a telescopic manner, so that the exhaust passage (21) is exhausted, and the front end of the limit pin (9) moves into the slot (15), and the rotary handle (5) can be rotated to drive the circuit breaker (4) to close and energize; When the circuit breaker (4) is in an open state, the non-displacement hole (16) area of ​​the tooth plate (8) blocks the rear end of the limit pin (9), so that the limit pin (9) cannot be extended or retracted, and the front end of the limit pin (9) restricts the rotation of the nut sleeve (14), so that the plug (13) cannot be pulled out.

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