A cabinet door self-locking mechanism for switch cabinet

Abstract

This utility model relates to the field of switchgear technology, and in particular to a self-locking mechanism for a switchgear door. It includes a cabinet body, with a door hinged to the front of the cabinet body. A sealing ring for buffering and sealing the switchgear is adhered to the inner edge of the door. A locking box is fixedly installed on one side of the cabinet body, and a self-locking mechanism is installed inside the locking box. An anti-accidental contact mechanism is installed on the outer side of the self-locking mechanism. The advantages are: the top of the locking frame locks the inner end of the locking post in a positioning groove on the outer side of the second limiting plate, and the limiting groove and limiting block stabilize the second limiting plate. Therefore, the locking post securely and stably locks the door and cabinet body, preventing loosening and shaking; the anti-accidental contact cover covers the outer end of the locking post, preventing accidental opening of the switchgear's self-locking mechanism by external contact with the locking post.

Description

Technical Field

[0001] This utility model relates to the field of switch cabinet technology, and in particular to a self-locking mechanism for switch cabinet doors. Background Technology

[0002] A switchgear is an electrical device. External power lines first enter the main control switch inside the cabinet, then the branch control switches, with each branch circuit configured according to its needs. This includes instruments, automatic control systems, motor magnetic switches, various AC contactors, etc. Some switchgear also have high-voltage and low-voltage compartments, and high-voltage busbars, such as in power plants. Some also have underfrequency load shearing mechanisms to protect key equipment. The main function of switchgear is to open, close, control, and protect electrical equipment during power generation, transmission, distribution, and energy conversion in a power system. The main components inside a switchgear include circuit breakers, disconnect switches, load switches, operating mechanisms, instrument transformers, and various protective devices. Switchgear is mainly suitable for various applications such as power plants, substations, petrochemical plants, metallurgical steel rolling mills, light industry and textiles, factories and mines, residential communities, and high-rise buildings.

[0003] The existing self-locking mechanism for switchgear doors is not stable enough after locking the door to the cabinet body. It can wobble and cause the self-locking mechanism to loosen, making it difficult to close the door securely. Moreover, after the self-locking mechanism locks the switchgear, its exterior is exposed to the outside of the door, making it easy to be accidentally opened by touching it, thus accidentally opening the switchgear. Therefore, the self-locking switchgear is not safe enough.

[0004] Therefore, a self-locking mechanism for switch cabinet doors is proposed. Utility Model Content

[0005] The purpose of this utility model is to solve the shortcomings of the existing technology where the self-locking connection of the switch cabinet is not stable enough, and there will be shaking, which will cause the self-locking of the switch cabinet to be loose and make it difficult to close the cabinet door stably. Therefore, a cabinet door self-locking mechanism for switch cabinets is proposed.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] Design a cabinet door self-locking mechanism for switch cabinets, including a cabinet body, a cabinet door is hinged to the front of the cabinet body, a sealing ring for buffering and sealing the switch cabinet is glued to the inner edge of the cabinet door, a locking box is fixedly installed on one side of the inside of the cabinet body, a self-locking mechanism is installed inside the locking box, and an anti-accidental contact mechanism is installed on the outside of the self-locking mechanism.

[0008] The self-locking mechanism includes a central bolt that is rotatably inserted into the middle of the locking box, a locking frame that is rotatably installed around the central bolt, a first spring-loaded component installed at the bottom of the locking frame, a second spring-loaded component installed at the top of the locking frame, and a locking post that slides through the cabinet door and whose inner end is locked to the top of the locking frame.

[0009] The anti-accidental touch mechanism includes an anti-accidental touch cover fixed to the outside of the cabinet door and covering the locking post, a retaining ring fixed to the outside of the anti-accidental touch cover, and push-pull handles for opening and closing the switch cabinet fixed to both ends of the outside of the retaining ring.

[0010] Furthermore, the locking box is a rectangular box structure and is horizontally arranged. It has connecting holes on both sides of its inner end. The connecting holes are threaded holes. The central bolt rotates through the connecting holes. The bottom corner of the locking frame has a rotating hole for the central bolt to slide through. The gap between the two sides of the locking frame is limited by a nut connected to the surface of the central bolt.

[0011] Furthermore, the locking bracket has an L-shaped structure, with its bottom end vertically abutting the inner end of the first spring-loaded component and its top end vertically abutting the inner end of the second spring-loaded component. Its middle part is horizontally positioned in the middle of the locking box. The outer side of the top end of the locking bracket is inclined inward and has a pointed angle, which is used to slide against the inner end of the locking post.

[0012] Furthermore, the first elastic component includes a first guide rod that slides through the inner end of the locking box, a first limiting plate fixed to the inner end of the first guide rod, and a first spring sleeved on the surface of the first guide rod and located inside the locking box. The bottom end of the locking frame abuts against the side of the first limiting plate. A limiting strip for limiting the outer side of the bottom end of the locking frame is fixed on the inner side of the locking box and at a position outside the first limiting plate. The vertical gap of the limiting strip is set on the outer side of the bottom end of the locking frame.

[0013] Furthermore, the second spring-loaded component includes a second guide rod that slides through the inner end of the locking box, a second limiting plate fixed to the inner end of the second guide rod, a positioning groove formed on the outer side of the second limiting plate for inserting and positioning the inner end of the locking post, and a second spring sleeved on the surface of the second guide rod and located inside the locking box. The top end of the locking frame abuts against the outer side of the second limiting plate. Limiting grooves are formed on the inner wall of the locking box at positions on both sides of the second guide rod. Limiting blocks that slide into the limiting grooves and are used to stably set the second limiting plate are fixed at both ends of the outer side of the second limiting plate.

[0014] Furthermore, the inner end of the locking box has a guide hole, and the outer ends of the first guide rod and the second guide rod slide horizontally through the guide hole. The outer ends of the first guide rod and the second guide rod are both limited and installed between the inner end of the locking box by a connecting nut. The limiting groove is a long strip horizontally set.

[0015] Furthermore, the surface of the cabinet door has an insertion hole for the locking post to slide through, and the inner end of one side of the locking post has a locking groove. The top of the locking bracket is slidably inserted into the locking groove. A third limiting plate is fixed to the outer end of the locking post, and a third spring is sleeved on the surface of the locking post at a position between the third limiting plate and the outer side of the cabinet door.

[0016] Furthermore, a knob strip is fixed to the outer end of the third limiting plate. The knob strip is horizontally arranged, and there is a gap between its two ends and the inner surface of the anti-accidental touch cover. The inner diameter of the retaining ring is smaller than the inner diameter of the anti-accidental touch cover. A tension spring is connected between the outer sides of the two ends of the knob strip and the inner side of the retaining ring.

[0017] Compared with the prior art, the self-locking mechanism for switch cabinet doors proposed in this utility model has the following advantages:

[0018] 1. This utility model fixes a locking box to one side inside the cabinet, and installs a locking frame inside the locking box by rotating it around a central bolt. The bottom and top of the locking frame elastically abut against a first limiting plate and a second limiting plate, respectively. Therefore, when the locking pin is pushed inside the anti-accidental contact cover, the locking pin slides elastically through the cabinet door and inserts into the cabinet through a third spring. Its inner end abuts against the inclined surface of the top of the locking frame, causing the locking frame to rotate around the central bolt. The bottom end of the locking frame abuts against the first limiting plate, and the top end moves away from the first limiting plate. One side of the second limiting plate moves, causing the locking pin to insert into the positioning groove on the side of the second limiting plate. Then, the first spring bounces the first limiting plate, which in turn pushes the bottom end of the locking frame, causing the locking frame to rotate. This causes the top end of the locking frame to reset and snap into the locking groove. Therefore, the top end of the locking frame locks and positions the inner end of the locking pin in the positioning groove on the outside of the second limiting plate. The locking groove and the limiting block limit and stabilize the second limiting plate. Thus, the locking pin securely and stably locks the cabinet door and the cabinet body, preventing loosening and shaking.

[0019] 2. In this utility model, after the locking post and locking frame are locked together and the cabinet and cabinet door are locked closed, an anti-accidental contact cover is placed over the outer end of the locking post to prevent accidental opening of the switch cabinet by external contact with the locking post. In addition, when the switch cabinet needs to be opened, by rotating the knob strip and stretching the tension spring, the locking groove and the top of the locking frame can be misaligned and separated. At the same time, the third spring bounces the third limiting plate outward, and the tension spring pulls the knob strip outward, so that the locking post moves outward along the insertion hole, leaving the positioning groove, thereby opening the switch cabinet. After releasing the knob strip, the elastic pull of the tension spring causes the locking post and the knob strip to rotate and reset, so that the locking groove is aligned with the outer side of the top of the locking frame, which facilitates the next direct push of the locking post into the locking box and locking connection with the locking frame. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This utility model Figure 1 A cross-sectional schematic diagram of the self-locking mechanism and the anti-accidental contact mechanism;

[0022] Figure 3 This utility model Figure 2 Enlarged view of point A;

[0023] Figure 4 This utility model Figure 1 A schematic diagram of the locking box and limit strip;

[0024] Figure 5 This utility model Figure 1 A schematic diagram of the first spring-loaded component, the second spring-loaded component, and the locking frame;

[0025] Figure 6 This utility model Figure 1 A schematic diagram of the locking pin and knob strip.

[0026] In the diagram: 1. Cabinet body; 2. Sealing ring; 3. Cabinet door; 4. Anti-accidental touch cover; 5. Retaining ring; 6. Push-pull handle; 7. Locking box; 8. Center bolt; 9. Limiting strip; 10. First limiting plate; 11. First spring; 12. First guide rod; 13. Second guide rod; 14. Second spring; 15. Locking bracket; 16. Locking post; 17. Third limiting plate; 18. Knob strip; 19. Tension spring; 20. Rotating hole; 21. Positioning groove; 22. Second limiting plate; 23. Limiting block; 24. Limiting groove; 25. Insertion hole; 26. Locking groove; 27. Guide hole; 28. Connecting hole; 29. ​​Third spring. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0028] For examples, please refer to Figures 1 to 6 The diagram shows a switch cabinet door self-locking mechanism, which includes a cabinet body 1. A cabinet door 3 is hinged to the front of the cabinet body 1. A sealing ring 2 for buffering and sealing the switch cabinet is glued to the inner edge of the cabinet door 3. A locking box 7 is fixedly installed on one side of the inside of the cabinet body 1. A self-locking mechanism is installed inside the locking box 7. An anti-accidental contact mechanism is installed on the outside of the self-locking mechanism.

[0029] In detail, the self-locking mechanism includes a central bolt 8 that is rotatably inserted into the middle of the locking box 7, a locking frame 15 that is rotatably installed around the central bolt 8, a first spring-loaded component installed at the bottom of the locking frame 15, a second spring-loaded component installed at the top of the locking frame 15, and a locking post 16 that slides through the cabinet door 3 and whose inner end is locked to the top of the locking frame 15.

[0030] The locking box 7 is a rectangular box structure and is set horizontally. It has connection holes 28 on both sides of its inner end. The connection holes 28 are threaded holes. The central bolt 8 rotates through the connection holes 28. The bottom corner of the locking frame 15 has a rotating hole 20 for the central bolt 8 to slide through. The gap between the two sides of the locking frame 15 is limited by the nut connected to the surface of the central bolt 8.

[0031] The locking bracket 15 has an L-shaped structure. Its bottom end is vertically abutted against the inner end of the first spring component, and its top end is vertically abutted against the inner end of the second spring component. Its middle part is horizontally positioned in the middle of the locking box 7. The outer side of the top end of the locking bracket 15 is inclined inward and has a pointed angle, which is used to slide against the inner end of the locking post 16.

[0032] The surface of the cabinet door 3 has a insertion hole 25 for the locking post 16 to slide through. The inner end of one side of the locking post 16 has a locking groove 26. The top of the locking bracket 15 slides and snaps into the locking groove 26. The outer end of the locking post 16 is fixed with a third limiting plate 17. A third spring 29 is sleeved on the surface of the locking post 16 at the position of the third limiting plate 17 and the outer side of the cabinet door 3.

[0033] Inside the anti-accidental contact cover 4, the locking pin 16 is pushed. The locking pin 16 slides elastically through the cabinet door 3 via the third spring 29 and is inserted into the cabinet body 1. Its inner end abuts against the top inclined surface of the pushing locking frame 15, causing the locking frame 15 to rotate around the central bolt 8. The bottom end of the locking frame 15 abuts against the pushing first limiting plate 10, and the top end moves away from the second limiting plate 22, thereby causing the locking pin 16 to be inserted into the positioning groove 21 on the side of the second limiting plate 22.

[0034] The first spring-loaded component includes a first guide rod 12 that slides through the inner end of the locking box 7, a first limiting plate 10 fixed to the inner end of the first guide rod 12, and a first spring 11 sleeved on the surface of the first guide rod 12 and located inside the locking box 7. The bottom end of the locking frame 15 abuts against the side of the first limiting plate 10. A limiting strip 9 for limiting the outer side of the bottom end of the locking frame 15 is fixed on the inner side of the locking box 7 and located outside the first limiting plate 10. The limiting strip 9 is vertically spaced outside the bottom end of the locking frame 15.

[0035] The second spring-loaded component includes a second guide rod 13 that slides through the inner end of the locking box 7, a second limiting plate 22 fixed to the inner end of the second guide rod 13, a positioning groove 21 opened on the outside of the second limiting plate 22 for the inner end of the locking post 16 to be inserted and positioned, and a second spring 14 sleeved on the surface of the second guide rod 13 and located inside the locking box 7.

[0036] The first spring 11 springs the first limiting plate 10, which in turn pushes the bottom end of the locking bracket 15, causing the locking bracket 15 to rotate. This causes the top end of the locking bracket 15 to reset and snap into the locking groove 26. Therefore, the top end of the locking bracket 15 locks and positions the inner end of the locking post 16 in the positioning groove 21 outside the second limiting plate 22.

[0037] The top of the locking bracket 15 abuts against the outer side of the second limiting plate 22. The inner wall of the locking box 7 and the position on both sides of the second guide rod 13 are provided with limiting grooves 24. The outer ends of the second limiting plate 22 are fixed with limiting blocks 23 that slide into the limiting grooves 24 and are used to stably set the second limiting plate 22.

[0038] The inner end of the locking box 7 has a guide hole 27. The outer ends of the first guide rod 12 and the second guide rod 13 slide horizontally through the guide hole 27. The outer ends of the first guide rod 12 and the second guide rod 13 are limited and installed between the inner end of the locking box 7 by a connecting nut. The limiting groove 24 is set in a long strip shape horizontally.

[0039] The second limiting plate 22 is limited and stabilized by the limiting groove 24 and the limiting block 23. Therefore, the locking post 16 securely and stably locks the cabinet door 3 and the cabinet body 1, preventing loosening and shaking.

[0040] Furthermore, the anti-accidental touch mechanism includes an anti-accidental touch cover 4 fixed to the outside of the cabinet door 3 and surrounding the locking post 16, a retaining ring 5 fixed to the outside of the anti-accidental touch cover 4, and push-pull handles 6 fixed to both ends of the outside of the retaining ring 5 for opening and closing the switch cabinet.

[0041] After the locking post 16 is locked to the locking frame 15 and the locking connection between the cabinet 1 and the cabinet door 3 is closed, the anti-accidental contact cover 4 covers the outer end of the locking post 16 to prevent external contact with the locking post 16 from accidentally opening the self-locking mechanism of the switch cabinet.

[0042] A knob strip 18 is fixed to the outer end of the third limiting plate 17. The knob strip 18 is horizontally set, and there is a gap between its two ends and the inner surface of the anti-accidental touch cover 4. The inner diameter of the retaining ring 5 is smaller than the inner diameter of the anti-accidental touch cover 4. A tension spring 19 is connected between the outer sides of the two ends of the knob strip 18 and the inner side of the retaining ring 5.

[0043] When the switch cabinet needs to be opened, by rotating the knob bar 18 and stretching the tension spring 19, the locking groove 26 and the top of the locking bracket 15 can be separated. At the same time, the third spring 29 bounces the third limiting plate 17 outward, and the tension spring 19 pulls the knob bar 18 outward, so that the locking post 16 moves outward along the insertion hole 25, leaving the positioning groove 21, thereby opening the switch cabinet.

[0044] Working method: The locking box 7 is fixed inside the cabinet 1 on one side, and the locking bracket 15 is installed inside the locking box 7 by rotating around the central bolt 8. The bottom and top of the locking bracket 15 elastically abut against the first limiting plate 10 and the second limiting plate 22, respectively.

[0045] Therefore, the locking pin 16 is pushed inside the anti-accidental contact cover 4. The locking pin 16 slides elastically through the cabinet door 3 and is inserted into the cabinet body 1 via the third spring 29. Its inner end abuts against the top inclined surface of the locking frame 15, so that the locking frame 15 rotates around the center bolt 8. The bottom end of the locking frame 15 abuts against the first limiting plate 10, and the top end moves away from the second limiting plate 22, thereby causing the locking pin 16 to be inserted into the positioning groove 21 on the side of the second limiting plate 22.

[0046] Subsequently, the first spring 11 springs the first limiting plate 10, which in turn pushes the bottom end of the locking bracket 15, causing the locking bracket 15 to rotate. This causes the top end of the locking bracket 15 to reset and snap into the locking groove 26. Therefore, the top end of the locking bracket 15 locks and positions the inner end of the locking post 16 in the positioning groove 21 on the outside of the second limiting plate 22. The second limiting plate 22 is then limited and stabilized by the limiting groove 24 and the limiting block 23. Thus, the locking post 16 securely and stably locks the cabinet door 3 and the cabinet body 1, preventing loosening and shaking.

[0047] After the locking post 16 is locked to the locking frame 15 and the locking connection between the cabinet 1 and the cabinet door 3 is closed, the anti-accidental contact cover 4 covers the outer end of the locking post 16 to prevent external contact with the locking post 16 from accidentally opening the self-locking mechanism of the switch cabinet.

[0048] When the switch cabinet needs to be opened, by rotating the knob bar 18 and stretching the tension spring 19, the locking groove 26 and the top of the locking bracket 15 can be separated. At the same time, the third spring 29 bounces the third limiting plate 17 outward, and the tension spring 19 pulls the knob bar 18 outward, so that the locking post 16 moves outward along the insertion hole 25, leaving the positioning groove 21, thereby opening the switch cabinet.

[0049] After the knob strip 18 is released, the elastic pull of the tension spring 19 causes the locking pin 16 and the knob strip 18 to rotate and reset, so that the locking groove 26 is aligned with the outer side of the top of the locking frame 15, making it easier to directly push the locking pin 16 into the locking box 7 and lock it with the locking frame 15 next time.

[0050] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. A cabinet door self-locking mechanism for a switch cabinet comprising a cabinet body (1), characterized in that: The cabinet (1) is hinged to a cabinet door (3) on the front. A sealing ring (2) for buffer sealing and closing of the switch cabinet is glued to the inner edge of the cabinet door (3). A locking box (7) is fixedly installed on one side of the inside of the cabinet (1). A self-locking mechanism is installed inside the locking box (7). An anti-accidental touch mechanism is installed on the outside of the self-locking mechanism. The self-locking mechanism includes a central bolt (8) that is rotatably inserted into the middle of the locking box (7), a locking frame (15) that is rotatably installed around the central bolt (8), a first spring-loaded component installed at the bottom of the locking frame (15), a second spring-loaded component installed at the top of the locking frame (15), and a locking post (16) that slides through the cabinet door (3) and whose inner end is locked to the top of the locking frame (15). The anti-accidental touch mechanism includes an anti-accidental touch cover (4) fixed to the outside of the cabinet door (3) and covering the locking post (16), a retaining ring (5) fixed to the outside of the anti-accidental touch cover (4), and push-pull handles (6) fixed to both ends of the outside of the retaining ring (5) for opening and closing the switch cabinet.

2. The door self-locking mechanism for switch cabinet according to claim 1, characterized in that: The locking box (7) is a rectangular box structure and is horizontally arranged. It has connecting holes (28) on both sides of its inner end. The connecting holes (28) are threaded holes. The central bolt (8) rotates through the connecting holes (28). The bottom corner of the locking frame (15) has a rotating hole (20) for the central bolt (8) to slide through. The gap between the two sides of the locking frame (15) is limited by the nut connected to the surface of the central bolt (8).

3. The door self-locking mechanism for switch cabinet according to claim 1, characterized in that: The locking bracket (15) has an L-shaped structure. Its bottom end is vertically abutted against the inner end of the first spring component, and its top end is vertically abutted against the inner end of the second spring component. Its middle part is horizontally arranged in the middle of the locking box (7). The outer side of the top end of the locking bracket (15) is inclined inward and has a sharp angle, which is used to slide against the inner end of the locking post (16).

4. The door self-locking mechanism for a switch cabinet according to claim 3, characterized in that: The first spring-loaded component includes a first guide rod (12) that slides through the inner end of the locking box (7), a first limiting plate (10) fixed to the inner end of the first guide rod (12), and a first spring (11) sleeved on the surface of the first guide rod (12) and located inside the locking box (7). The bottom end of the locking frame (15) abuts against the side of the first limiting plate (10). A limiting strip (9) for limiting the outer side of the bottom end of the locking frame (15) is fixed on the inner side of the locking box (7) and located outside the first limiting plate (10). The vertical gap of the limiting strip (9) is set on the outer side of the bottom end of the locking frame (15).

5. The door self-locking mechanism for switch cabinet according to claim 4, characterized in that: The second spring-loaded component includes a second guide rod (13) that slides through the inner end of the locking box (7), a second limiting plate (22) fixed to the inner end of the second guide rod (13), a positioning groove (21) opened on the outer side of the second limiting plate (22) for the inner end of the locking post (16) to be inserted and positioned, and a second spring (14) sleeved on the surface of the second guide rod (13) and located inside the locking box (7). The top end of the locking bracket (15) abuts against the outer side of the second limiting plate (22). A limiting groove (24) is opened on the inner wall of the locking box (7) at the position on both sides of the second guide rod (13). A limiting block (23) is fixed at both ends of the outer side of the second limiting plate (22) and slides into the limiting groove (24) for stabilizing the second limiting plate (22).

6. The cabinet door self-locking mechanism for a switchgear according to claim 5, characterized in that: The inner end of the locking box (7) has a guide hole (27). The outer ends of the first guide rod (12) and the second guide rod (13) slide horizontally through the guide hole (27). The outer ends of the first guide rod (12) and the second guide rod (13) are limited and installed between the inner end of the locking box (7) by connecting nuts. The limiting groove (24) is a long strip horizontally set.

7. The door self-locking mechanism for switch cabinet according to claim 1, characterized in that: The cabinet door (3) has a insertion hole (25) for the locking post (16) to slide through. The inner end of one side of the locking post (16) has a locking groove (26). The top of the locking bracket (15) is slidably inserted into the locking groove (26). The outer end of the locking post (16) is fixed with a third limiting plate (17). A third spring (29) is sleeved on the surface of the locking post (16) and at the position outside the third limiting plate (17) and the cabinet door (3).

8. The door self-locking mechanism for a switch cabinet according to claim 7, characterized in that: The outer end of the third limiting plate (17) is fixed with a knob strip (18). The knob strip (18) is horizontally arranged, and there is a gap between its two ends and the inner surface of the anti-accidental touch cover (4). The inner diameter of the retaining ring (5) is smaller than the inner diameter of the anti-accidental touch cover (4). A tension spring (19) is connected between the outer sides of the two ends of the knob strip (18) and the inner side of the retaining ring (5).

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