An electric cabinet door safety grounding device with mechanical self-locking function

Abstract

The utility model provides a kind of electric cabinet door safety grounding device with mechanical self-locking function, belong to switchgear technical field;Including cabinet body and the cabinet door body of installation on cabinet body, further include: protective locking mechanism includes the support rod fixed in the side of cabinet body, support rod top is fixed with round sleeve, slidingly connected with insulating locking block in round sleeve, spring one is connected between the bottom of insulating locking block and support rod, and the top of insulating locking block is provided with grounding assembly.The utility model is through setting insulating locking block and L-shaped metal sheet, grounding assembly is located in the inside of insulating locking block, and the protection of grounding assembly is realized by the cooperation of insulating locking block and L-shaped metal sheet, and the grounding assembly of cabinet door body is installed on the outside of cabinet door, prevent tool or electronic component from knocking into grounding assembly in the process of overhaul, to ensure the reliable grounding of cabinet door body.

Description

Technical Field

[0001] This utility model relates to the field of power distribution cabinet technology, and in particular to a safety grounding device for a power cabinet door with mechanical self-locking function. Background Technology

[0002] Distribution cabinets typically integrate circuit breakers, disconnect switches, fuses, transformers, and instruments. They can distribute externally input high-voltage or low-voltage electrical energy according to the needs of different electrical equipment. They can also monitor electrical parameters such as current and voltage in real time. In the event of overload, short circuit, or leakage faults in the circuit, the internal protection components can quickly cut off the power supply to prevent equipment damage or safety accidents. In addition, the cabinet body is grounded by connecting to the grounding busbar inside the cabinet through a grounding wire, and the cabinet door is also grounded by connecting to the cabinet body through a grounding wire.

[0003] When performing maintenance work on electronic components inside the distribution cabinet, the cabinet door must be opened first. The grounding wire of the cabinet door will be directly exposed when the door is opened. During the maintenance process, tools such as screwdrivers and wrenches are frequently used, which poses a risk of accidental contact between the tools and the insulation layer of the grounding wire, resulting in damage to the insulation layer or exposure of the wire. Furthermore, when the electronic component to be replaced is installed close to the grounding wire of the cabinet door, the electronic component is prone to collision with the grounding wire during disassembly, assembly, or handling, or the grounding wire may be squeezed due to limited operating space, further increasing the risk of damage to the insulation layer of the grounding wire or deformation or even breakage of the grounding wire, thus creating a hidden danger to the grounding protection of the cabinet door. Therefore, this application provides a safety grounding device for the cabinet door with mechanical self-locking function to meet the requirements. Summary of the Invention

[0004] This utility model provides a safety grounding device for an electrical cabinet door with a mechanical self-locking function to solve the problem that when the cabinet door is opened and the maintenance tools are used to repair the electronic components inside the cabinet, the grounding wire is easily bumped and damaged, causing damage to the insulation layer of the grounding wire. At the same time, when replacing electronic components near the grounding wire of the cabinet door, the electronic components are easily bumped and squeezed, resulting in damage to the grounding wire, thus creating a hidden danger to the grounding protection of the cabinet door.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: A safety grounding device for an electrical cabinet door with a mechanical self-locking function includes a cabinet body and a cabinet door body installed on the cabinet body, and further includes: The protective locking mechanism includes a support rod fixed to the side of the cabinet, a circular sleeve fixed to the top of the support rod, an insulating locking block slidably connected inside the circular sleeve, a spring connecting the bottom of the insulating locking block and the support rod, a grounding component set on the top of the insulating locking block, the grounding component being electrically connected to the cabinet door via a wire, and the insulating locking block providing protection for the grounding component. An L-shaped metal plate is fixed to the side of the cabinet, and a metal limiting strip is fixed to the bottom of the horizontal section of the L-shaped metal plate. The metal limiting strip is an isosceles trapezoid. The top corner of the insulating locking block is in contact with the inclined surface of the side of the metal limiting strip to lock the cabinet door. The tops of both the insulating locking block and the grounding component are in contact with the bottom of the horizontal section of the L-shaped metal plate. After the top of the grounding component is attached to the L-shaped metal plate, the cabinet door body and the cabinet are electrically connected. The cabinet is electrically connected to the grounding busbar through the grounding wire.

[0006] Preferably, the grounding component includes a square groove formed on the top of the insulating locking block, a carbon brush slidably connected in the square groove, a spring connecting the bottom of the carbon brush to the bottom of the inner wall of the square groove, and the top of the carbon brush fitting against the bottom of the horizontal section of the L-shaped metal plate to achieve an electrical connection between the cabinet door body and the cabinet.

[0007] Preferably, a support ring is fixed to the top of the insulating locking block, and a grinding ring is fixed to the top of the support ring. The carbon brush is located inside the grinding ring, and the top corner of the grinding ring is in contact with the inclined surface of the side of the metal limiting strip. When the cabinet door body is opened and closed, the grinding ring rotates along the bottom of the horizontal section of the L-shaped metal plate to grind off the oxide layer at the bottom of the horizontal section of the L-shaped metal plate.

[0008] Preferably, the bottom of the support ring is provided with a chip discharge port, and the top of the insulating locking block is provided with an inclined guide surface, which is used to guide the debris ground off by the grinding ring to fall around the insulating locking block.

[0009] Preferably, a shielding ring is fixedly sleeved on the insulating locking block, and the outer diameter of the shielding ring is larger than the outer diameter of the circular sleeve.

[0010] Preferably, the shielding ring is inclined.

[0011] Preferably, a second shielding ring is fixed to the top of the insulating locking block, and the outer wall of the second shielding ring is connected to the guide surface.

[0012] Preferably, a positioning block is fixed to the side of the vertical section of the L-shaped metal plate, and when the cabinet door body is opened, the side of the positioning block fits against the outer wall of the circular sleeve.

[0013] Compared with the prior art, this utility model has at least the following beneficial effects: In the above scheme, by setting an insulating locking block and an L-shaped metal plate, the grounding component is located inside the insulating locking block. The grounding component is protected by the cooperation of the insulating locking block and the L-shaped metal plate. The grounding component of the cabinet door body is installed on the outside of the cabinet door to prevent tools or electronic components from hitting the grounding component during maintenance, thereby ensuring the reliable grounding of the cabinet door body.

[0014] By setting a grinding ring, the carbon brush of the grounding component is always electrically connected to the L-shaped metal plate during the opening and closing of the cabinet door. However, the bottom of the horizontal section of the L-shaped metal plate will oxidize when it comes into contact with air. Oxidation will affect the stability of the electrical connection between the carbon brush and the L-shaped metal plate. When the cabinet door opens and closes, it will drive the grinding ring on the top of the insulating locking block to rotate synchronously. Under the action of the spring force, the grinding ring will press against the bottom of the horizontal section of the L-shaped metal plate to grind it, removing the oxide layer by grinding. This ensures the stability of the electrical connection between the carbon brush and the L-shaped metal plate, making the grounding of the cabinet door more stable and reliable.

[0015] By setting a guide surface and a shielding ring, the grinding debris falls onto the guide surface on the top of the insulating locking block, slides down the inclined guide surface, and falls from the chip discharge port at the bottom of the support ring onto the shielding ring. It continues to fall down along the inclined shielding ring. The guide surface prevents debris from accumulating on the top of the insulating locking block, while the shielding ring prevents debris from falling into the gap between the insulating locking block and the circular sleeve and affecting the vertical movement of the insulating locking block.

[0016] By setting a second shielding ring, the second shielding ring is used to prevent debris from falling into the gap between the carbon brush and the inner wall of the square groove, thus preventing the grinding debris from interfering with the extension and retraction of the carbon brush. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 For the present utility model Figure 1 Enlarged view of the structure at point A in the middle; Figure 3 This is a three-dimensional structural diagram of the L-shaped metal plate of this utility model. Figure 4 This is a cross-sectional view of the carbon brush section of this utility model; Figure 5 This is a three-dimensional structural diagram of the positioning block of this utility model.

[0018] In the diagram: 1. Cabinet body; 2. Cabinet door body; 3. Protective locking mechanism; 4. Support rod; 5. Round sleeve; 6. Spring 1; 7. Insulating locking block; 8. Support ring; 9. Grinding ring; 10. Guide surface; 11. Shielding ring 1; 12. Grounding component; 13. Carbon brush; 14. Spring 2; 15. Wire; 16. Shielding ring 2; 17. L-shaped metal plate; 18. Positioning block; 19. Metal limit strip. Detailed Implementation

[0019] The following is a detailed description of a safety grounding device for an electrical cabinet door with a mechanical self-locking function provided by this utility model, in conjunction with the accompanying drawings and specific embodiments. It should be noted that, to make the embodiments more detailed, the following embodiments are the best and preferred embodiments; those skilled in the art can also use other alternative methods to implement some known technologies; and the accompanying drawings are only for more specific description of the embodiments and are not intended to specifically limit this utility model.

[0020] like Figures 1-5 As shown, an embodiment of this utility model provides a safety grounding device for an electrical cabinet door with a mechanical self-locking function, including a cabinet body 1 and a cabinet door body 2 installed on the cabinet body 1, and further including: The protective locking mechanism 3 includes a support rod 4 fixed to the side of the cabinet 1. A circular sleeve 5 is fixed to the top of the support rod 4. An insulating locking block 7 is slidably connected inside the circular sleeve 5. A spring 6 is connected between the bottom of the insulating locking block 7 and the support rod 4. A grounding component 12 is provided on the top of the insulating locking block 7. The grounding component 12 is electrically connected to the cabinet door through a wire 15. The insulating locking block 7 protects the grounding component 12. An L-shaped metal plate 17 is fixed to the side of the cabinet 1. The L-shaped metal plate 17 is a copper plate. The top and sides of the L-shaped metal plate 17 can be sprayed with insulating paint. A metal limiting strip 19 is fixed to the bottom of the horizontal section of the L-shaped metal plate 17. The metal limiting strip 19 is a copper strip. The metal limiting strip 19 is an isosceles trapezoid. The top corner of the insulating locking block 7 fits against the inclined surface of the side of the metal limiting strip 19 to lock the cabinet door body 2. The tops of the insulating locking block 7 and the grounding component 12 are both fitted against the bottom of the horizontal section of the L-shaped metal plate 17. After the top of the grounding component 12 is attached to the L-shaped metal plate 17, an electrical connection is achieved between the cabinet door body 2 and the cabinet 1. The cabinet 1 is electrically connected to the grounding busbar through a grounding wire. The support rod 4 provides stable support for the circular sleeve 5, ensuring that the circular sleeve 5 and the cabinet 1 maintain a fixed position relationship, providing a reference for the sliding of the insulating locking block 7. The circular sleeve 5 restricts the sliding direction of the insulating locking block 7, allowing it to move only in the vertical direction, avoiding deviation that could lead to locking or grounding failure. The spring 6 provides an upward thrust to the insulating locking block 7 through elastic reset, ensuring that the top of the insulating locking block 7 is always attached to the bottom of the horizontal section of the L-shaped metal plate 17, ensuring locking stability. The insulating locking block 7 can both wrap and protect the grounding component 12, preventing tools from colliding with the grounding component 12 during maintenance, and avoid... The grounding-free component 12 avoids accidental contact with other metal parts, ensuring grounding safety. Its top, in conjunction with the inclined surface of the metal limiting strip 19, enables mechanical self-locking when the cabinet door body 2 is opened to a preset position, preventing the cabinet door body 2 from being closed by external force and preventing the cabinet door body 2 from suddenly closing and affecting the maintenance operations of maintenance personnel. The isosceles trapezoidal structure of the metal limiting strip 19 provides inclined surface extrusion force on both sides, meeting the dual requirements of closing and unlocking the cabinet door body 2 and opening and self-locking. The L-shaped metal plate 17 serves as a common carrier for locking and grounding, achieving both mechanical limiting and transmitting grounding current through conductive material. This allows the cabinet door body 2 to form a complete grounding circuit through the grounding component 12, the L-shaped metal plate 17, the grounding wire of the cabinet body 1, and the grounding busbar, ensuring electrical safety.

[0021] like Figure 4 As shown, in this embodiment, the grounding component 12 includes a square groove on the top of the insulating locking block 7. A carbon brush 13 is slidably connected in the square groove. A spring 14 is connected between the bottom of the carbon brush 13 and the bottom of the inner wall of the square groove. The top of the carbon brush 13 is attached to the bottom of the horizontal section of the L-shaped metal plate 17 to achieve an electrical connection between the cabinet door body 2 and the cabinet 1. The carbon brush 13 has good conductivity, and its tight attachment with the L-shaped metal plate 17 can achieve a stable electrical connection. The static electricity or leakage current of the cabinet door body 2 is transmitted to the grounding circuit of the cabinet 1 through the wire 15, the carbon brush 13, and the L-shaped metal plate 17. The spring 14 provides continuous upward pressure to the carbon brush 13 through elastic reset, ensuring that the carbon brush 13 is always tightly attached to the bottom of the horizontal section of the L-shaped metal plate 17 during the opening and closing of the cabinet door body 2, avoiding grounding interruption due to contact gaps, and ensuring grounding continuity and reliability.

[0022] like Figure 3 and Figure 4As shown in this embodiment, a support ring 8 is fixed to the top of the insulating locking block 7, and a grinding ring 9 is fixed to the top of the support ring 8. The carbon brush 13 is located inside the grinding ring 9. The top corner of the grinding ring 9 is in contact with the inclined surface of the side of the metal limiting strip 19. When the cabinet door body 2 is opened and closed, the grinding ring 9 rotates along the bottom of the horizontal section of the L-shaped metal plate 17 to grind off the oxide layer at the bottom of the horizontal section of the L-shaped metal plate 17. The support ring 8 fixes the grinding ring 9 to the top of the insulating locking block 7 to ensure that the grinding ring 9 and the insulating locking block 7 move synchronously, so that the grinding action is linked with the opening and closing action of the cabinet door body 2. The grinding ring 9 is made of the same material as the grinding wheel, namely aluminum oxide or silicon carbide, which can effectively grind the L-shaped metal plate 17. The top of the grinding ring 9 fits tightly with the bottom of the horizontal section of the L-shaped metal plate 17, and can rotate synchronously with the insulating locking block 7 when the cabinet door body 2 is opened and closed. It grinds away the oxide layer formed on the surface of the L-shaped metal plate 17 due to air oxidation. The oxide layer increases the contact resistance and affects the grounding conductivity. The grinding action of the grinding ring 9 can keep the surface of the L-shaped metal plate 17 clean at all times, ensuring the stable electrical connection between the carbon brush 13 and the L-shaped metal plate 17 and avoiding grounding failure.

[0023] like Figure 4 As shown in this embodiment, the bottom of the support ring 8 is provided with a chip discharge port, and the top of the insulating locking block 7 is provided with an inclined guide surface 10. The guide surface 10 is used to guide the debris from the grinding ring 9 to fall around the insulating locking block 7. The chip discharge port provides a falling channel for the metal debris generated by the grinding ring 9, so that the debris can fall from the inside of the support ring 8 to the guide surface 10. The inclined structure of the guide surface 10 can guide the debris to slide around the insulating locking block 7, avoiding the accumulation of debris on the top of the insulating locking block 7.

[0024] like Figure 4 As shown in this embodiment, a shielding ring 11 is fixedly sleeved on the insulating locking block 7. The outer diameter of the shielding ring 11 is larger than the outer diameter of the circular sleeve 5. If debris sliding down from the guide surface 10 falls into the gap between the insulating locking block 7 and the circular sleeve 5, it will hinder the vertical sliding of the insulating locking block 7, causing the locking or unlocking action to be stuck. The outer diameter of the shielding ring 11 is larger than that of the circular sleeve 5, which can form a shielding barrier on the top of the circular sleeve 5, so that the debris slides down along the guide surface 10 onto the shielding ring 11 instead of falling into the gap. At the same time, the shielding ring 11 is fixed on the insulating locking block 7 and moves synchronously with the insulating locking block 7, always keeping the opening of the circular sleeve 5 blocked, ensuring that debris will not enter the gap during the entire sliding process of the insulating locking block 7, and ensuring that the insulating locking block 7 slides smoothly.

[0025] like Figure 4As shown in this embodiment, the shielding ring 11 is inclined. The inclined shielding ring 11 can further guide the debris to slide away from the insulating locking block 7 and the circular sleeve 5, avoiding the accumulation of debris on the top of the shielding ring 11. The inclined structure uses gravity to make the debris slide quickly to the outside, completely eliminating the hidden danger of debris accumulation, while reducing the frequency of manual cleaning of debris, reducing maintenance costs, and ensuring the long-term stable operation of each structure.

[0026] like Figure 4 As shown in this embodiment, a second shielding ring 16 is fixed to the top of the insulating locking block 7. The outer wall of the second shielding ring 16 is connected to the guide surface 10. The second shielding ring 16 surrounds the periphery of the square groove opening and can prevent grinding debris from falling into the square groove.

[0027] like Figure 3 and Figure 5 As shown in this embodiment, a positioning block 18 is fixed to the side of the vertical section of the L-shaped metal plate 17. When the cabinet door body 2 is opened, the side of the positioning block 18 fits against the outer wall of the round sleeve 5. When the cabinet door body 2 is opened to the preset position, the positioning block 18 can achieve a limit by fitting against the outer wall of the round sleeve 5. At the same time, the fitting position of the positioning block 18 and the round sleeve 5 is the position where the top of the grinding ring 9 and the inclined surface of the metal limiting strip 19 form a self-locking position. The two work together to ensure that the cabinet door body 2 stays in the same position every time it is opened, which is convenient for maintenance personnel to operate and avoids the self-locking failure due to the deviation of the opening position, further ensuring maintenance safety.

[0028] Working principle: When the cabinet door body 2 is closed, the cabinet door body 2 drives the insulating locking block 7 to rotate away from the cabinet body 1 via the support rod 4. At this time, the top corner of the grinding ring 9 will first come into contact with the inclined side of the metal limiting strip 19 at the bottom of the horizontal section of the L-shaped metal plate 17. Since the metal limiting strip 19 is an isosceles trapezoid, the squeezing force generated by the inclined surface will push the grinding ring 9 to drive the insulating locking block 7 to slide downward in the circular sleeve 5, while compressing the bottom spring 6. As the cabinet door body 2 continues to close, when the grinding ring 9 completely passes the metal limiting strip 19, the spring 6 returns to its original position, pushing the insulating locking block 7 to slide upward synchronously with the grinding ring 9 until the insulating locking block 7... The top of the top of the grinding ring 9 is attached to the bottom of the horizontal section of the L-shaped metal plate 17, releasing the mechanical self-locking of the cabinet door body 2. During this process, the carbon brush 13 in the square groove inside the insulating locking block 7 is also pressed down by the inclined surface of the metal limiting strip 19, first pressing the spring 14. When the carbon brush 13 is aligned with the bottom plane of the metal limiting strip 19, it is attached to the plane under the elastic force of the spring 14. After the carbon brush 13 separates from the metal limiting strip 19, it moves upward under the elastic force of the spring 14 and continues to be attached to the bottom of the horizontal section of the L-shaped metal plate 17. When the carbon brush 13 contacts the metal limiting strip 19, it can still provide reliable grounding to the cabinet door body 2. The cabinet door body 2 is electrically connected to the grounding busbar through the wire 15, carbon brush 13, L-shaped metal plate 17 and the grounding wire of the cabinet body 1 to complete the safe grounding. At the same time, the insulating locking block 7 wraps the carbon brush 13 of the grounding component 12, and the grounding component 12 is installed on the outside of the cabinet door body 2 to prevent tools or electronic components from colliding with the grounding component 12 during maintenance, thus ensuring the reliable grounding of the cabinet door body 2. When the cabinet door body 2 needs to be opened, pull the cabinet door body 2. The cabinet door body 2, through the support rod 4, drives the insulating locking block 7 and the grinding ring 9 to move closer to the cabinet body 1 simultaneously. At this time, the top corner of the grinding ring 9 is in contact with the inclined surface on the other side of the metal limiting strip 19. Under the pressure of the inclined surface, the insulating locking block 7 is compressed downwards by the spring 6, and the grinding ring 9 separates from the horizontal section of the L-shaped metal plate 17. After the grinding ring 9 and the insulating locking block 7 are separated from the position of the metal limiting strip 19, continue to open the cabinet door body 2. The spring 6 returns to its original position and pushes the insulating locking block 7 upwards, so that the grinding ring 9 is once again in contact with the bottom of the horizontal section of the L-shaped metal plate 17. At this time, the fixed side of the vertical section of the L-shaped metal plate 17... Positioning block 18 fits against the outer wall of circular sleeve 5 to position cabinet door body 2. As insulating locking block 7 and grinding ring 9 approach cabinet body 1, carbon brush 13 moves synchronously and always fits against the bottom of horizontal section of L-shaped metal plate 17 or bottom of metal limiting strip 19, ensuring reliable grounding of cabinet door body 2. When circular sleeve 5 fits against positioning block 18, the opening action of cabinet door body 2 stops. At this time, the corner of grinding ring 9 contacts the inclined surface of metal limiting strip 19, and under the elastic force of spring 6, the cabinet door body 2 is self-locked, effectively preventing the cabinet door body 2 from closing after being touched by external force, affecting the operator's maintenance of electronic components inside cabinet body 1. Throughout the opening and closing process of the cabinet door 2, the polishing ring 9 rotates synchronously with the insulating locking block 7 along the bottom of the horizontal section of the L-shaped metal plate 17. The elastic force of the spring 6 keeps the polishing ring 9 in close contact with the bottom of the horizontal section of the L-shaped metal plate 17. Since the bottom of the horizontal section of the L-shaped metal plate 17 is prone to oxidation due to contact with air, the polishing ring 9 will polish away the oxidation layer as it rotates, preventing the oxidation layer from affecting the electrical connection between the carbon brush 13 and the L-shaped metal plate 17 and ensuring stable grounding. The debris generated by polishing will naturally fall onto the inclined guide surface 10 on the top of the insulating locking block 7 and slide down the guide surface 10 to the bottom of the support ring 8. The debris falls from the discharge port onto the inclined shielding ring 11 fixedly sleeved on the insulating locking block 7. Since the outer diameter of the shielding ring 11 is larger than the outer diameter of the round sleeve 5, the debris will slide down the inclined surface of the shielding ring 11 to the outside of the round sleeve 5. This prevents the debris from accumulating on the top of the insulating locking block 7 and also prevents it from falling into the gap between the insulating locking block 7 and the round sleeve 5 and affecting the extension and retraction of the insulating locking block 7. At the same time, the shielding ring 2 16 connected to the guide surface 10 at the top of the insulating locking block 7 will prevent the debris from falling into the gap between the carbon brush 13 and the inner wall of the square groove, preventing the debris from interfering with the extension and retraction of the carbon brush 13 and further ensuring the normal operation of the grounding component 12. When carbon brush 13 and grinding ring 9 have been used for a long time, they need to be replaced. When replacing carbon brush 13, remove the bolts fixing L-shaped metal plate 17 from the side of cabinet 1 to remove L-shaped metal plate 17. Then, the grinding ring 9 and carbon brush 13 will be exposed. Then, unscrew the nut fixing wire 15 from the screw at cabinet door body 2 to separate wire 15 from cabinet door body 2. At the same time, since the bottom of spring 14 is only in contact with the bottom of the inner wall of square groove, carbon brush 13 can be taken out directly from square groove. Spring 14 is taken out from square groove along with carbon brush 13, and wire 15 is pulled out from insulating locking block 7 at the same time. Then, the new wire 15 is passed out from insulating locking block 7 and round sleeve 5 and connected to cabinet door body 2. Then, L-shaped metal plate 17 is fixed to the side of cabinet 1 with bolts and can be used again. When replacing the grinding ring 9, after removing the L-shaped metal plate 17, disconnect the wire 15 from the cabinet body 2. At the same time, since the top of the spring 6 is only in contact with the bottom of the insulating locking block 7, pull the insulating locking block 7 upwards to remove it from the round sleeve 5, thus disassembling the insulating locking block 7. This simultaneously completes the replacement of the grinding ring 9, the insulating locking block 7, and the carbon brush 13. Then, reinsert the new insulating locking block 7 into the round sleeve 5. The new insulating locking block 7 can be equipped with the grinding ring 9 and the carbon brush 13. After inserting the new insulating locking block 7 into the round sleeve 5, reinstall the L-shaped metal plate 17 onto the side of the cabinet 1 to complete the replacement of the grinding ring 9. When replacing the L-shaped metal plate 17, simply remove and install the bolts that fix the L-shaped metal plate 17.

[0029] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A safety grounding device for an electrical cabinet door with a mechanical self-locking function, comprising a cabinet body (1) and a cabinet door body (2) installed on the cabinet body (1), characterized in that, Also includes: The protective locking mechanism (3) includes a support rod (4) fixed to the side of the cabinet (1), a round sleeve (5) fixed to the top of the support rod (4), an insulating locking block (7) slidably connected inside the round sleeve (5), a spring (6) connecting the bottom of the insulating locking block (7) and the support rod (4), and a grounding component (12) provided on the top of the insulating locking block (7). The grounding component (12) is electrically connected to the cabinet door through a wire (15), and the connection is achieved through the insulating locking block (7). For the protection of the grounding component (12), an L-shaped metal plate (17) is fixed on the side of the cabinet (1). A metal limiting strip (19) is fixed at the bottom of the horizontal section of the L-shaped metal plate (17). The metal limiting strip (19) is an isosceles trapezoid. The top corner of the insulating locking block (7) is attached to the inclined surface of the side of the metal limiting strip (19) to lock the cabinet door body (2). The tops of the insulating locking block (7) and the grounding component (12) are attached to the bottom of the horizontal section of the L-shaped metal plate (17). After the top of the grounding component (12) is attached to the L-shaped metal plate (17), the cabinet door body (2) and the cabinet (1) are electrically connected. The cabinet (1) is electrically connected to the grounding busbar through the grounding wire.

2. The electrical cabinet door safety grounding device with mechanical self-locking function according to claim 1, characterized in that, The grounding component (12) includes a square groove on the top of the insulating locking block (7), a carbon brush (13) is slidably connected in the square groove, a spring (14) is connected between the bottom of the carbon brush (13) and the bottom of the inner wall of the square groove, and the top of the carbon brush (13) is attached to the bottom of the horizontal section of the L-shaped metal plate (17) to realize the electrical connection between the cabinet door body (2) and the cabinet (1).

3. The electrical cabinet door safety grounding device with mechanical self-locking function according to claim 2, characterized in that, The top of the insulating locking block (7) is fixed with a support ring (8), and the top of the support ring (8) is fixed with a grinding ring (9). The carbon brush (13) is located inside the grinding ring (9). The top corner of the grinding ring (9) is in contact with the inclined surface of the side of the metal limit strip (19). When the cabinet door body (2) is opened and closed, the grinding ring (9) rotates along the bottom of the horizontal section of the L-shaped metal plate (17) to grind off the oxide layer at the bottom of the horizontal section of the L-shaped metal plate (17).

4. The electrical cabinet door safety grounding device with mechanical self-locking function according to claim 3, characterized in that, The bottom of the support ring (8) is provided with a chip discharge port, and the top of the insulating locking block (7) is provided with an inclined guide surface (10). The guide surface (10) is used to guide the debris ground off by the grinding ring (9) to fall around the insulating locking block (7).

5. The electrical cabinet door safety grounding device with mechanical self-locking function according to claim 4, characterized in that, A shielding ring (11) is fixedly sleeved on the insulating locking block (7), and the outer diameter of the shielding ring (11) is larger than the outer diameter of the round sleeve (5).

6. The electrical cabinet door safety grounding device with mechanical self-locking function according to claim 5, characterized in that, The shielding ring (11) is inclined.

7. The electrical cabinet door safety grounding device with mechanical self-locking function according to claim 4, characterized in that, The top of the insulating locking block (7) is fixed with a second shielding ring (16), and the outer wall of the second shielding ring (16) is connected to the guide surface (10).

8. The electrical cabinet door safety grounding device with mechanical self-locking function according to claim 1, characterized in that, The vertical section of the L-shaped metal plate (17) is fixed with a positioning block (18). When the cabinet door body (2) is opened, the side of the positioning block (18) fits against the outer wall of the round sleeve (5).

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