Passive electromagnetic grounding lock

Abstract

The application relates to a passive electromagnetic grounding lock which comprises a mounting base plate, a lock body shell, a grounding lock mechanism, a locking mechanism, an unlocking mechanism and a trigger switch device, the lock body shell is sleeved outside the mounting base plate, one end of the mounting base plate is provided with a waterproof joint, an inner thread is arranged on the inner wall of the waterproof joint, an insertion hole is arranged on the vertical end of the mounting base plate, and the grounding lock mechanism and the locking mechanism are arranged on the outer end and the inner end of the insertion hole of the mounting base plate respectively; the unlocking mechanism is arranged on the inner side wall of the mounting base plate and located at one side of the locking mechanism; the trigger switch device is arranged on the inner side wall of the mounting base plate through a supporting rod and located at one end of the locking mechanism; the inner thread of the waterproof joint can be matched with the outer thread of a stainless steel sleeve wrapped outside a signal line and a power line, and no additional connecting sleeve assembly is needed, so that quick connection is realized.

Description

Technical Field

[0001] This invention belongs to the field of grounding lock technology, specifically relating to a passive electromagnetic grounding lock. Background Technology

[0002] Electromagnetic grounding locks are electrical grounding interlocking devices mainly developed for use as electrical interlocks in automated substations. During the maintenance of electrical equipment, operators insert the ground wire end into the grounding electromagnetic lock to ground the equipment or line being maintained, thereby isolating the equipment or protecting personnel.

[0003] Patent No. CN200720037978.0 discloses an electromagnetic grounding lock, which includes a lock body and a grounding rod. The lock body has a grounding rod insertion hole for inserting the grounding rod. A locking tongue controlled by an electromagnetic operating mechanism is provided on one side of the grounding rod insertion hole. The lock is characterized by: an external threaded sleeve that is fixed integrally with the lock body shell at the entrance of the grounding rod insertion hole, and the outer wall of the external threaded sleeve has external threads; a protruding shoulder is provided on the grounding rod, and a nut that mates with the external threaded sleeve is screwed on the external threaded sleeve. The root of the inner hole of the nut has a step that mates with the shoulder on the grounding rod, and the step presses against the shoulder. The patent and existing technology have the following problems: (1) After the grounding rod is inserted into the insertion hole, it is mainly locked and fixed by the cooperation of the external thread sleeve and the nut. In actual use, depending on the strength of each person, there is a situation where the nut cannot be tightened properly, resulting in unreliable grounding resistance; (2) The insertion hole of the grounding rod is always in a state of communication with the inside of the grounding lock. In actual use, small animals such as insects may enter the grounding lock through the gap of the insertion hole, which may cause short circuits in the internal circuit of the grounding lock; (3) There are many welded wires between the micro switch and the grounding terminal inside the grounding lock, which makes the wiring complicated and inconvenient for maintenance; (4) When the signal line and power line are connected to the connector of the grounding lock through the stainless steel sleeve, a matching connecting sleeve is required for connection and fixation. Therefore, it is necessary for those skilled in the art to make improvements. Summary of the Invention

[0004] In view of the above-mentioned problems, the present invention discloses a passive electromagnetic grounding lock to solve the technical problems mentioned in the background art.

[0005] The specific technical solution is as follows:

[0006] A passive electromagnetic grounding lock includes a mounting base, a lock body shell, a grounding lock mechanism, a locking mechanism, an unlocking mechanism, and a trigger switch. The lock body shell is sleeved on the outside of the mounting base, which has an L-shaped structure. A waterproof connector is embedded in the horizontal end of the mounting base. The inner wall of the waterproof connector has an internal thread that mates with the external thread of a stainless steel conduit. An insertion hole is formed on the vertical end of the mounting base. The grounding lock mechanism and the locking mechanism are respectively located at the outer and inner ends of the insertion hole on the mounting base. The grounding lock mechanism is used to clamp and fix the grounding rod; the locking mechanism is used to... The grounding rod is prevented from being directly inserted into the grounding lock; the unlocking mechanism is located on the inner wall of the mounting base and on one side of the locking mechanism, and is used to control the locking mechanism to no longer limit the insertion of the grounding rod; the trigger switch is located on the inner wall of the upper mounting base via a support rod and at one end of the locking mechanism, and is used to detect when the grounding rod is inserted into the grounding lock and to operate; the grounding lock mechanism includes a grounding plate, a sliding plate, a clamping ring, a clamping block, a guide rod, a movable plate, a cam seat, and a knob, the grounding plate has a Z-shaped structure, and the upper end of the grounding plate is fixedly connected to the outer surface of the mounting base, and the lower end of the grounding plate... The end extends to the bottom of the mounting base plate. A through hole corresponding to the insertion hole is formed at the upper end of the mounting base plate. The sliding plate is fixedly mounted at the through hole on the mounting base plate. Two clamping blocks are slidably mounted on the sliding plate, arranged vertically. An arc-shaped clamping groove is formed on one adjacent side of each clamping block. A clamping ring is tightly fitted into each clamping groove. An insertion tube is provided at one end of the inner side of the clamping ring. The insertion tube passes through the sliding plate and is embedded in the through hole. A guide rod is passed through each side of the two clamping blocks. Two movable plates are fitted onto the ends of the guide rods away from the clamping blocks. The two movable plates have... Two guide rods pass through the grounding rod, with positioning nuts at both ends. A spring is fitted in the middle of each guide rod, with each end of the spring pressing against a movable plate and a clamping block, respectively. A cam seat is positioned between the two movable plates. One end of the cam seat is rotatably mounted on the grounding plate via a rotating shaft, and the other end is connected to the knob. Cam blocks are provided on both side walls of the cam seat. The knob drives the rotating cam seat to rotate, causing the cam seat to push the movable plate on the guide rod through the cam blocks and push the clamping block through the spring. This causes the two clamping blocks to clamp the clamping ring, thus achieving the clamping and fixing of the grounding rod by the clamping ring.

[0007] Furthermore, the locking mechanism includes a locking housing, a frame electromagnet, a locking pin, a paddle plate, and a paddle spring. One side of both the locking housing and the frame electromagnet is fixedly mounted on the inner wall of the mounting base. The locking housing has a horizontally penetrating positioning hole corresponding to the insertion hole position. The frame electromagnet is located above the locking housing. The locking pin is located at the output end of the frame electromagnet. The lower end of the locking pin penetrates downwards through the locking housing and enters the positioning hole for limiting its position. A locking disc is located at the upper end of the locking pin. A support spring is sleeved on the output end of the frame electromagnet. The lower end of the support spring presses against the locking disc for support. The frame electromagnet is controlled by a pressing unlocking device set on the mounting base plate, which drives the locking pin to rise. Connecting seats are provided on both sides of the lower end of the locking shell, and a paddle pin is provided between the two connecting seats. The paddle plate is rotatably mounted on the paddle pin. The upper end of the paddle plate is fitted against the side wall of the locking shell and blocks the positioning hole. The paddle spring is sleeved on the paddle pin, and the two ends of the paddle spring press against the bottom end of the mounting base plate and the side wall of the paddle plate, respectively, to support the paddle plate.

[0008] Furthermore, accommodating grooves are symmetrically provided on both sides of the positioning hole, and top beads are elastically connected in the accommodating grooves. The front end of the top bead has a hemispherical structure and extends into the positioning hole. The front end of the top bead is limited by one end of the accommodating groove, and the rear end of the top bead is supported by a spring, so that the two top beads position the front end of the grounding rod and ensure that the grounding rod is inserted in place.

[0009] Furthermore, the press-to-unlock device includes a touch switch and a spring button. The touch switch is disposed on the inner wall of the mounting base plate and is electrically connected to the frame electromagnet via a wire. The spring button is disposed through the side wall of the mounting base plate, with one inner end of the spring button close to the contact piece of the touch switch. By pressing the spring button, the inner end of the spring button pushes the contact piece of the touch switch, thereby energizing the frame electromagnet. This causes the frame electromagnet to drive the locking pin to rise, thus eliminating the limitation on the positioning hole.

[0010] Furthermore, the trigger switch device includes terminals, a PCB board, and micro switches. The PCB board is surrounded by support rods, which are vertically mounted on the inner wall of the mounting base and located at the upper end of the locking shell. Terminals and multiple micro switches are respectively provided on both sides of the PCB board, so that the terminals are electrically connected to the multiple micro switches through the PCB board, and the terminals are electrically connected to the trigger switches through wires. The multiple micro switches are arranged horizontally, and the contacts of the multiple micro switches are all set downward and attached to one side of the lever plate. When the lever plate moves under the push of the grounding rod, it pushes the contacts of the micro switches, thereby triggering the micro switches to work.

[0011] Furthermore, the PCB has multiple slots arranged horizontally, each slot being a long strip structure, with each slot located between two adjacent microswitches.

[0012] Furthermore, the unlocking mechanism includes an unlocking shell, an unlocking shaft, an unlocking pin, and an unlocking key. The unlocking shell is cylindrical and horizontally mounted on the mounting base. One outer end of the unlocking shell is open for inserting the unlocking key. A movable opening is radially formed on the side wall of the unlocking shell near the locking pin. The unlocking shaft is disposed within the inner cavity of the unlocking shell, and the unlocking pin is vertically disposed on the side wall of the unlocking shaft. The unlocking pin passes through the movable opening, and one end of the unlocking pin extends to one side of the locking pin and is located below the locking disc. One end of the unlocking shaft cooperates with the unlocking key, causing the unlocking key to drive the unlocking shaft to rotate, and causing the unlocking pin to move in the movable opening and push the locking disc upward, so that the locking pin no longer limits the positioning hole. A positioning groove is provided on the side of the movable opening near the unlocking key, and a positioning spring is provided on the other end of the unlocking shaft. The positioning spring presses against the inner wall of one end of the unlocking shell and supports the unlocking shaft, so that the locking pin is engaged in the central positioning opening for positioning.

[0013] Furthermore, the outer wall of the vertical end of the mounting base plate is provided with a front cover plate for covering the grounding lock mechanism. The front cover plate is flush with the lock body shell, and the front cover plate is provided with holes for accommodating the clamp ring, knob, elastic button and unlocking shell.

[0014] The beneficial effects of this invention are reflected in:

[0015] (1) In this invention, the grounding lock mechanism uses a clamping seat in conjunction with a clamping ring. After the knob drives the cam seat to rotate 90 degrees, the two clamping seats clamp the clamping ring, thereby clamping and fixing the grounding rod in the clamping ring. The fixing effect is better, the operation is more convenient, and the problem of not being able to clamp due to different strengths of each person is avoided, thus ensuring the reliability of the grounding resistance.

[0016] (2) In this invention, the locking mechanism has a paddle plate rotatably mounted on the locking shell. The paddle plate can rotate when the grounding rod is inserted into the grounding lock, thereby triggering the micro switch to work and meeting the working requirements of the grounding lock. At the same time, another function of the paddle plate is that when the grounding rod is not inserted, the paddle plate is fitted with the locking shell under the support of the paddle spring, thereby covering the positioning hole and effectively preventing small animals such as insects from entering the grounding lock and causing a short circuit in the internal circuit. It is highly practical.

[0017] (3) In the trigger switch device of the present invention, the wiring terminals are connected to each micro switch through the PCB board, eliminating the traditional wire welding method, making the internal structure of the grounding lock simpler and easier to maintain. At the same time, the PCB board has slots of a certain width between the micro switches, which can increase the insulation strength of the PCB board and ensure the stability of the circuit between the components.

[0018] (4) In this invention, a waterproof connector is provided on the mounting base plate. The inner wall of the waterproof connector is provided with an internal thread. When the grounding lock is connected to the signal line and the power line, the internal thread of the waterproof connector can cooperate with the external thread of the stainless steel sleeve wrapped around the outside of the signal line and the power line, without the need for an additional connecting sleeve assembly, thereby achieving a quick connection. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0020] Figure 2 This is a side view of the mounting substrate in this invention.

[0021] Figure 3 This is a schematic diagram of the back structure of the mounting substrate in this invention.

[0022] Figure 4 This is a schematic diagram of the front structure of the mounting substrate in this invention.

[0023] Figure 5 This is a schematic diagram of the grounding lock mechanism in this invention.

[0024] Figure 6 This is a schematic diagram of the cam seat in this invention.

[0025] Figure 7 This is a schematic diagram of the clamp ring in this invention.

[0026] Figure 8 This is a schematic diagram of the front structure of the locking shell in this invention.

[0027] Figure 9 This is a schematic diagram of the back structure of the locking shell in this invention.

[0028] Figure 10 This is a schematic diagram of the trigger switch device in the present invention.

[0029] Figure 11 This is a schematic diagram of the structure between the unlocking mechanism and the locking disc in this invention.

[0030] Figure 12 This is a schematic diagram of the unlocking mechanism in this invention.

[0031] Mounting base plate 1, waterproof connector 11, perforated plate 12, front cover plate 13, slot 14, insertion hole 15, dust cover 16, lock body shell 2, grounding rod 3.

[0032] Grounding lock mechanism 4, grounding plate 41, sliding plate 42, clamping ring 43, insertion pipe 431, clamping block 44, clamping groove 441, guide rod 45, positioning nut 451, movable plate 46, cam seat 47, cam block 471, knob 48, spring 49.

[0033] Locking mechanism 5, locking housing 51, positioning hole 511, top ball 512, connecting seat 513, paddle pin 514, frame electromagnet 52, locking disc 521, support spring 522, locking pin 53, paddle plate 54, paddle spring 55;

[0034] Press-to-unlock device 6, touch switch 61, elastic button 62;

[0035] Trigger switch 7, terminal block 71, PCB board 72, slot 721, micro switch 73, support rod 74;

[0036] Unlocking mechanism 8, unlocking shell 81, movable opening 811, positioning spring 812, positioning groove 813, unlocking shaft 82, unlocking pin 83, unlocking key 84. Detailed Implementation

[0037] To make the technical solution of this invention clearer and more explicit, the invention will be further described below with reference to the accompanying drawings. Any solution derived by equivalent substitution and conventional reasoning of the technical features of this invention falls within the protection scope of this invention. The fixed connections and fixed installations mentioned in this invention are all common connection methods in the mechanical field, including welding, bolt and nut connections, and screw connections.

[0038] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0039] like Figure 1-12As shown, a passive electromagnetic grounding lock includes a mounting base plate 1, a lock body shell 2, a grounding lock mechanism 4, a locking mechanism 5, an unlocking mechanism 8, and a trigger switch device 7. The lock body shell 2 is sleeved on the outside of the mounting base plate 1. The mounting base plate 1 has an L-shaped structure. A waterproof connector 11 is embedded in the horizontal end of the mounting base plate 1. The inner wall of the waterproof connector 11 has an internal thread that mates with the external thread of a stainless steel conduit. A heat dissipation hole is opened on the horizontal end of the mounting base plate 1, and a perforated plate 12 is provided on the inner wall of the mounting base plate 1 at the location of the heat dissipation hole. An insertion hole 15 is opened on the vertical end of the mounting base plate 1, and the upper part of the mounting base plate 1... A grounding lock mechanism 4 and a locking mechanism 5 are respectively provided at one outer end and one inner end of the insertion hole 15. The grounding lock mechanism 4 is used to clamp and fix the grounding rod 3; the locking mechanism 5 is used to prevent the grounding rod 3 from being directly inserted into the grounding lock; the unlocking mechanism 8 is provided on the inner wall of the mounting base plate 1 and located on one side of the locking mechanism 5. The unlocking mechanism 8 is used to control the locking mechanism 5 to no longer limit the insertion of the grounding rod 3; the trigger switch device 7 is provided on the inner wall of the upper mounting base plate 1 and located at one end of the locking mechanism 5 via a support rod 74. The trigger switch device 7 is used to detect when the grounding rod 3 is inserted into the grounding lock and to operate.

[0040] The grounding lock mechanism 4 includes a grounding plate 41, a sliding plate 42, a clamping ring 43, a clamping block 44, a guide rod 45, a movable plate 46, a cam seat 47, and a knob 48. The grounding plate 41 has a Z-shaped structure, and its upper end is fixedly connected to the outer surface of the mounting base plate 1. The lower end of the grounding plate 41 extends to the bottom end of the mounting base plate 1. A through hole corresponding to the position of the insertion hole 15 is opened at the upper end of the grounding plate 41. The sliding plate 42 is fixedly installed at the through hole on the grounding plate 41, and two clamping blocks 44 are slidably installed on the sliding plate 42. Two clamping blocks 44 are arranged vertically between each other. Each clamping block 44 has an arc-shaped clamping groove 441 on one adjacent side. A clamping ring 43 is tightly fitted into each clamping groove 441. One end of the clamping ring 43 has a connecting pipe 431 that passes through a sliding plate 42 and is embedded in a through hole. A guide rod 45 passes through each side of the two clamping blocks 44. Two movable plates 46 are fitted onto the ends of the guide rods 45 away from the clamping blocks 44. Two connecting plates 46 are respectively connected to two… Guide rods 45 pass through the center, and both ends of the two guide rods 45 are provided with positioning nuts 451. Springs 49 are fitted around the middle of both guide rods 45, and both ends of the springs 49 press against a movable plate 46 and a clamping block 44 respectively. A cam seat 47 is positioned between the two movable plates 46. One end of the cam seat 47 is rotatably mounted on a base plate 41 via a pivot, and the other end is connected to the knob 48. Cam blocks 471 are provided on both side walls of the cam seat 47, and the two cam blocks 471 are symmetrically arranged. One side of the cam block 471... The corners are set with arc transitions, while the other corner is set with right angles, so that the cam seat 47 can only rotate in one direction. The two ends of the two cam blocks 471 abut against the movable plate 46 to achieve positioning of the cam seat 47. The knob 48 drives the rotating cam seat 47 to rotate, so that the cam seat 47 pushes the movable plate 46 on the guide rod 45 through the cam blocks 471 and pushes the clamping block 44 through the spring 49, so that the two clamping blocks 44 clamp the clamping ring 43, thereby achieving quick clamping and fixing of the clamping ring 43 to the grounding rod 3.

[0041] The locking mechanism 5 includes a locking shell 51, a frame electromagnet 52, a locking pin 53, a paddle plate 54, and a paddle spring 55. One side of the locking shell 51 and the frame electromagnet 52 are fixedly disposed on the inner side wall of the mounting base plate 1. The locking shell 51 has a horizontally penetrating positioning hole 511 corresponding to the position of the insertion hole 15. The positioning hole 511 has symmetrically arranged receiving grooves on both sides. The receiving grooves are elastically connected to the top beads 512. The front end of the top bead 512 is hemispherical and extends into the positioning hole 511. The front end of the top bead 512 is limited by one end of the receiving groove. The rear end of the top bead 512 is supported by a spring 49, so that the two top beads 512 position the front end of the grounding rod 3 and ensure that the grounding rod 3 is inserted in place. The frame electromagnet 52 is located above the locking housing 51. A locking pin 53 is provided at the output end of the frame electromagnet 52. The lower end of the locking pin 53 penetrates downwards through the locking housing 51 and enters the positioning hole 511 for limiting its position. A locking disc 521 is provided at the upper end of the locking pin 53. A support spring 522 is sleeved on the output end of the frame electromagnet 52. The lower end of the support spring 522 presses against the locking disc 521 for support, thereby ensuring that the locking pin 53 remains stationary in the positioning hole 511. The frame electromagnet 52 is unlocked by a pressing device provided on the mounting base plate 1. 6 is controlled and, under the control of the pressing unlocking device 6, drives the locking pin 53 to rise; both sides of the lower end of the locking shell 51 are provided with connecting seats 513, and a paddle pin 514 is provided between the two connecting seats 513. The paddle plate 54 is rotatably mounted on the paddle pin 514. The upper end of the paddle plate 54 is fitted against the side wall of the locking shell 51 and blocks the positioning hole 511. The paddle spring 55 is sleeved on the paddle pin 514, and the two ends of the paddle spring 55 press against the bottom end of the mounting base plate 1 and the side wall of the paddle plate 54 respectively, so as to support the paddle plate 54.

[0042] The press-to-unlock device 6 includes a touch switch 61 and a spring button 62. The touch switch 61 is disposed on the inner wall of the mounting base plate 1 and located on one side of the ground plate 41. The touch switch 61 is electrically connected to the frame electromagnet 52 through a wire. The spring button 62 is disposed through the side wall of the mounting base plate 1. One inner end of the spring button 62 is close to the contact piece of the touch switch 61. By pressing the spring button 62, the inner end of the spring button 62 pushes the contact piece of the touch switch 61, thereby energizing the frame electromagnet 52. This causes the frame electromagnet 52 to drive the locking pin 53 to rise, thus no longer limiting the positioning hole 511.

[0043] The trigger switch device 7 includes a terminal block 71, a PCB board 72, and micro switches 73. The PCB board 72 is a PCB signal adapter board. Support rods 74 are arranged around the PCB board 72, and the support rods 74 are all vertically arranged on the inner side wall of the mounting base plate 1 and located at the upper end of the locking shell 51. The terminal block 71 and multiple micro switches 73 are respectively arranged on both sides of the PCB board 72, so that the terminal block 71 is electrically connected to the multiple micro switches 73 through the PCB board 72, and the terminal block 71 is electrically connected to the trigger switch 61 through wires. The multiple micro switches 73 are arranged horizontally, and the contacts of the multiple micro switches 73 are all arranged downward and attached to one side of the toggle plate 54. When the toggle plate 54 moves under the push of the grounding rod 3, it pushes the contacts of the micro switches 73, thereby triggering the micro switches 73 to work. Multiple slots 721 are arranged horizontally on the PCB. The slots 721 are all elongated structures, and each slot 721 is located between two adjacent micro switches 73.

[0044] When the electromagnet malfunctions or an emergency prevents the elastic button 62 from being pressed properly for unlocking, it can be unlocked via the unlocking mechanism 8. The unlocking mechanism 8 includes an unlocking shell 81, an unlocking shaft 82, an unlocking pin 83, and an unlocking key 84. The unlocking shell 81 is cylindrical and horizontally mounted on the mounting base plate 1. One outer end of the unlocking shell 81 is open for inserting the unlocking key 84. A radially opening 811 is provided on the side wall of the unlocking shell 81 near the locking pin 53. The unlocking shaft 82 is located within the cavity of the unlocking shell 81, and the unlocking pin 83 is vertically mounted on the side wall of the unlocking shaft 82, passing through the opening 811. The unlocking pin 83 extends to one side of the locking pin 53 and is located below the locking disc 521. One end of the unlocking shaft 82 cooperates with the unlocking key 84, causing the unlocking key 84 to drive the unlocking shaft 82 to rotate, and causing the unlocking pin 83 to move in the movable opening 811 and push the locking disc 521 upward, so that the locking pin 53 is no longer limited by the positioning hole 511. The movable opening 811 has a positioning groove 813 on the side near the unlocking key 84, and the other end of the unlocking shaft 82 has a positioning spring 812. The positioning spring 812 presses against the inner wall of one end of the unlocking shell 81 and supports the unlocking shaft 82, so that the locking pin 53 is engaged in the middle positioning opening for positioning. At the same time, a removable dust cover 16 is fitted on the outer end of the unlocking shell 81 and the outer end of the clamp ring 43 when not in use.

[0045] The outer wall of the vertical end of the mounting base plate 1 is provided with a front cover plate 13 for covering the grounding lock mechanism 4. The front cover plate 13 has a rectangular structure, and the edge of the front cover plate 13 is flush with the lock body shell 2. The front cover plate 13 is provided with holes for accommodating the clamp ring 43, the knob 48, the elastic button 62 and the unlocking shell 81. The two sides of the vertical end of the mounting base plate 1 are provided with slots 14 for engaging and fixing with the lock body shell 2, so as to realize the detachable mounting structure of the mounting base plate 1 and the lock body shell 2.

[0046] Working principle: When the grounding lock mechanism 4 is working, the grounding rod 3 is inserted into the clamping ring 43. The knob 48 drives the cam seat 47 to rotate. The cam blocks 471 at both ends of the cam seat 47 push the movable plate 46 to move to both sides. One of the movable plates 46 pushes the spring 49. The spring 49 is compressed and pushes one of the clamping blocks 44. The clamping block 44 pushes the clamping ring 43. The other movable plate 46 drives the guide rod 45 upward through the positioning nut. When the guide rod 45 rises, it drives the other clamping block 44 to move towards the center of the clamping ring through the positioning nut 451 at its lower end. In this way, the two clamping blocks 44 deform and compress the clamping ring with forces in different directions, thereby achieving the effect of clamping the grounding rod 3.

[0047] When the locking mechanism 5 is working, the grounding rod 3 passes through the clamping ring. If certain conditions are not met, the locking disc 521 on the frame electromagnet 52 is in a drooping state, causing the locking pin 53 to block the positioning hole 511, preventing the grounding rod 3 from being inserted into the locking housing 51. To insert the grounding rod 3, the elastic button 62 needs to be pressed to energize the frame electromagnet 52. At this time, the frame electromagnet 52 performs an attraction action, and the locking disc 521 retracts, causing the locking effect to rise, allowing the grounding rod 3 to be inserted. If the electromagnet is faulty, the unlocking key 84 is turned to activate the unlocking rod, which pushes the locking disc 521 upward, allowing the grounding rod 3 to be smoothly inserted into the locking housing 51.

[0048] The toggle plate 54 serves two purposes: first, it can seal the hole in the locking housing 51 through the pressure of the torsion spring, preventing small animals such as insects from entering when not in operation; second, the insertion of the grounding rod 3 pushes the toggle plate 54, causing it to move and then push the micro switch 73 on the PCB board 72. The micro switch 73 has normally open and normally closed signals. If the toggle plate 54 is pushed by the grounding rod 3, it will move to push the contact of the micro switch 73. When pushed to a certain position, the signal of the micro switch 73 will change, from normally open to normally closed, and vice versa, and the signal will be transmitted out through the terminal 71.

[0049] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A passive electromagnetic grounding lock, characterized in that, The system includes a mounting base (1), a lock body shell (2), a grounding lock mechanism (4), a locking mechanism (5), an unlocking mechanism (8), and a trigger switch device (7). The lock body shell (2) is sleeved on the outside of the mounting base (1). The mounting base (1) has an L-shaped structure. A waterproof connector (11) is embedded on the horizontal end of the mounting base (1). The waterproof connector (11) has an internal thread on its inner wall. An insertion hole (15) is opened on the vertical end of the mounting base (1). The grounding lock mechanism (4) and the locking mechanism (5) are respectively provided on the outer end and the inner end of the insertion hole (15) on the mounting base (1). The unlocking mechanism (8) is provided on the inner wall of the mounting base (1) and is located on one side of the locking mechanism (5). The trigger switch device (7) is mounted on the inner wall of the upper mounting base plate (1) via a support rod (74) and located at one end of the locking mechanism (5); the grounding lock mechanism (4) includes a grounding plate (41), a sliding plate (42), a clamping ring (43), a clamping block (44), a guide rod (45), a movable plate (46), a cam seat (47), and a knob (48). The upper end of the grounding plate (41) is fixedly connected to the outer surface of the mounting base plate (1), and the lower end of the grounding plate (41) extends to the bottom end of the mounting base plate (1). The upper end of the grounding plate (41) is provided with a through hole corresponding to the position of the insertion hole (15). The sliding plate (42) is fixedly mounted at the through hole on the grounding plate (41), and two clamping blocks are slidably mounted on the sliding plate (42). The two clamping blocks (44) are arranged vertically and clamped together by a clamping ring (43). One end of the clamping ring (43) has a connecting pipe (431) that penetrates the sliding plate (42) and is embedded in the through hole. A guide rod (45) is installed on each side of the two clamping blocks (44). Two movable plates (46) are fitted onto the ends of the two guide rods (45) away from the clamping blocks (44). The two movable plates (46) are connected to the two guide rods (45) on both sides. Both ends of the two guide rods (45) have positioning nuts (451). A spring (49) is fitted onto the middle of each guide rod (45). The springs (49) have two... Each end is pressed against a movable plate (46) and a clamping block (44) respectively. The cam seat (47) is set between the two movable plates (46). One end of the cam seat (47) is rotatably set on the grounding plate (41) through a rotating shaft, and the other end is connected to the knob (48). Cam blocks (471) are provided on both sides of the cam seat (47). The knob (48) drives the rotating cam seat (47) to rotate, so that the cam seat (47) pushes the movable plate (46) to move on the guide rod (45) through the cam block (471) and pushes the clamping block (44) through the spring (49), so that the two clamping blocks (44) clamp the clamping ring (43) and realize the clamping and fixing of the clamping ring (43) to the grounding rod (3).

2. The passive electromagnetic grounding lock as described in claim 1, characterized in that, The locking mechanism (5) includes a locking shell (51), a frame electromagnet (52), a locking pin (53), a paddle plate (54), and a paddle spring (55). One side of the locking shell (51) and the frame electromagnet (52) are fixedly mounted on the inner wall of the mounting base plate (1). The locking shell (51) has a horizontally penetrating positioning hole (511) corresponding to the position of the insertion hole (15). The frame electromagnet (52) is located above the locking shell (51). The locking pin (53) is provided at the output end of the frame electromagnet (52). The lower end of the locking pin (53) penetrates downward through the locking shell (51) and enters the positioning hole (511) for limiting. The upper end of the locking pin (53) is provided with a locking disc (521). A support spring (522) is sleeved on the output end of the frame electromagnet (52). The lower end of the support spring (522) presses against the locking disc (521) for support. The frame electromagnet (52) is controlled by the pressing unlocking device (6) set on the mounting base (1) and drives the locking pin (53) to rise. Both sides of the lower end of the locking shell (51) are provided with connecting seats (513). A paddle pin (514) is provided between the two connecting seats (513). The paddle plate (54) is rotatably set on the paddle pin (514). The upper end of the paddle plate (54) is fitted against the side wall of the locking shell (51) and blocks the positioning hole (511). The paddle spring (55) is sleeved on the paddle pin (514), and the two ends of the paddle spring (55) press against the bottom end of the mounting base (1) and the side wall of the paddle plate (54) respectively to support the paddle plate (54).

3. A passive electromagnetic grounding lock as described in claim 2, characterized in that, The positioning hole (511) has symmetrically provided receiving grooves on both sides. The receiving grooves are provided with elastically connected top beads (512). The front end of the top bead (512) is hemispherical and extends into the positioning hole (511). The front end of the top bead (512) is limited by one end of the receiving groove. The rear end of the top bead (512) is supported by a spring (49), so that the two top beads (512) position the front end of the grounding rod (3).

4. A passive electromagnetic grounding lock as described in claim 2, characterized in that, The press-to-unlock device (6) includes a touch switch (61) and a spring button (62). The touch switch (61) is disposed on the inner wall of the mounting base plate (1) and is electrically connected to the frame electromagnet (52) through a wire. The spring button (62) is disposed through the side wall of the mounting base plate (1). One inner end of the spring button (62) is close to the contact piece of the touch switch (61). By pressing the spring button (62), the inner end of the spring button (62) pushes the contact piece of the touch switch (61), thereby energizing the frame electromagnet (52), so that the frame electromagnet (52) drives the locking pin (53) to rise, thereby no longer limiting the positioning hole (511).

5. A passive electromagnetic grounding lock as described in claim 4, characterized in that, The trigger switch device (7) includes a terminal block (71), a PCB board (72), and micro switches (73). The PCB board (72) is surrounded by support rods (74), which are vertically mounted on the inner wall of the mounting base (1) and located at the upper end of the locking shell (51). The PCB board (72) is provided with a terminal block (71) and multiple micro switches (73) on both sides, so that the terminal block (71) is electrically connected to multiple micro switches (73) through the PCB board (72), and the terminal block (71) is electrically connected to the trigger switch (61) through a wire. The multiple micro switches (73) are arranged horizontally, and the contacts of the multiple micro switches (73) are all set downward and attached to one side of the lever plate (54). When the lever plate (54) moves under the push of the grounding rod (3), it pushes the contacts of the micro switches (73), thereby triggering the micro switches (73) to work.

6. A passive electromagnetic grounding lock as described in claim 5, characterized in that, The PCB has multiple slots (721) arranged horizontally. Each slot (721) is a long strip structure and is located between two adjacent microswitches (73).

7. A passive electromagnetic grounding lock as described in claim 2, characterized in that, The unlocking mechanism (8) includes an unlocking shell (81), an unlocking shaft (82), an unlocking pin (83), and an unlocking key (84). The unlocking shell (81) is cylindrical and horizontally mounted on the mounting base plate (1). One outer end of the unlocking shell (81) is open for inserting the unlocking key (84). A movable opening (811) is radially provided on the side wall of the unlocking shell (81) near the locking pin (53). The unlocking shaft (82) is disposed in the cavity of the unlocking shell (81). The unlocking pin (83) is vertically disposed on the side wall of the unlocking shaft (82). The unlocking pin (83) passes through the movable opening (811), and one end of the unlocking pin (83) extends to one end of the locking pin (53). Located below the locking disc (521), one end of the unlocking shaft (82) is engaged with the unlocking key (84), so that the unlocking key (84) drives the unlocking shaft (82) to rotate, and the unlocking pin (83) moves in the movable port (811) and pushes the locking disc (521) to rise, so that the locking pin (53) no longer limits the positioning hole (511); the movable port (811) is provided with a positioning groove (813) on the side near the unlocking key (84), and the other end of the unlocking shaft (82) is provided with a positioning spring (812). The positioning spring (812) presses against the inner wall of one end of the unlocking shell (81) and supports the unlocking shaft (82), so that the locking pin (53) is engaged in the middle positioning port for positioning.

8. A passive electromagnetic grounding lock as described in claim 1, characterized in that, The mounting base plate (1) has a front cover plate (13) on the outer wall of the vertical end for covering the grounding lock mechanism (4). The front cover plate (13) is flush with the lock body shell (2), and the front cover plate (13) has holes for accommodating the clamp ring (43), knob (48), elastic button (62) and unlocking shell (81).

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