A cabinet door self-locking structure of a switch cabinet
Patent Information
- Application Number
- CN202522457952.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-20
- Publication Date
- 2026-10-27
- Estimated Expiration
- 2035-11-20
AI Technical Summary
开关柜的柜门能隔绝柜体内部的高压电气部件与外部环境，防止人员误触引发触电风险，也能阻挡灰尘、水汽、杂物进入柜体，避免电气元件受潮或被污染而影响运行稳定性，目前，虽然柜门通常配有专用的门锁或联锁机构，确保非专业人员无法随意开启，保障用电安全，但在工作人员对开关柜内部的电气设备进行维护检修完成后，因检修流程衔接不当或整理工具、记录数据导致注意力分散出现柜门忘记关闭的情况，从而会使得外部灰尘、水汽、杂物直接进入柜体，附着在电气元件表面，可能导致元件绝缘性能下降，引发短路、漏电故障，更加严重的是柜体内部高压部件暴露，若有人员误触，易造成触电事故
本实用新型中，检修时，工作人员踩踏踏板可通过转轴、第一连接杆、第二连接杆等传动结构带动限位轴上移，使其限位槽与限位块贴合固定柜门，保障检修过程中柜门稳定开启，便于操作，而当工作人员离开踏板后，拉力弹簧会带动转轴复位，使限位轴与固定轴上的限位块分离，此时形变后的弹簧片会释放回弹势能，推动柜门自动闭合，避免外部灰尘、水汽、杂物进入柜体内部。
Smart Images
Figure CN224908852U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of electrical equipment technology, and in particular to a self-locking structure for the cabinet door of a switch cabinet. Background Technology
[0002] The cabinet door of the switch cabinet is a component at the front of the switch cabinet body. It is used to enclose the electrical components inside the cabinet, and also serves the functions of operation, observation and protection. The cabinet door of a switchgear isolates the high-voltage electrical components inside from the external environment, preventing accidental contact and electric shock. It also blocks dust, moisture, and debris from entering the cabinet, preventing electrical components from becoming damp or contaminated and affecting operational stability. Currently, although cabinet doors are usually equipped with dedicated locks or interlocking mechanisms to ensure that non-professionals cannot open them at will and to ensure electrical safety, after maintenance and repair of the electrical equipment inside the switchgear, improper procedures or distractions caused by organizing tools and recording data may lead to the cabinet door being left open. This allows external dust, moisture, and debris to directly enter the cabinet and adhere to the surface of electrical components, potentially causing a decrease in the insulation performance of the components, leading to short circuits and leakage faults. More seriously, the high-voltage components inside the cabinet may be exposed, which could easily cause electric shock accidents if someone accidentally touches them. Utility Model Content
[0003] The purpose of this utility model is to provide a self-locking structure for the cabinet door of a switch cabinet, which can effectively solve the problems in the background art.
[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A self-locking structure for a switch cabinet door includes a cabinet body. The cabinet body is fixedly connected to several perforated plates. A cabinet door is movably connected between two vertically aligned perforated plates. Guide sleeves are fixedly connected to the lower ends of the two perforated plates. Limiting shafts are inserted within the guide sleeves. A pressure mechanism is also provided on the cabinet body located below the guide sleeves. The pressure mechanism includes a base plate fixedly connected to the front side of the cabinet body. A support plate is rotatably connected to the base plate. A pedal is fixedly connected between two support plates. Several second connecting blocks are fixedly connected to one side of the pedal relative to the cabinet body. A column is fixedly connected to the base plate near the pedal. A rotating shaft is rotatably connected within the column. A first connecting block is fixedly connected to one end of the rotating shaft. A first connecting rod is movably connected between the first and second connecting blocks. A crank is fixedly connected to the rotating shaft located between the column and the first connecting block.
[0005] As a further optimization of this utility model, a number of spring plates are fixedly connected to one side of the cabinet near the cabinet door. After the cabinet door is opened, the spring plates can be compressed and deformed, thereby achieving the function of automatically closing the cabinet door without being restricted by external force by means of the rebound force of the deformed spring plates.
[0006] As a further optimization of this utility model, a lock is fixedly connected inside the cabinet door.
[0007] As a further optimization of this utility model, a fixed shaft is fixedly connected to both the upper and lower ends of the cabinet door near the cabinet body. A limit block is fixedly connected to the end of the fixed shaft away from the cabinet door. The transverse cross section of the limit block is polygonal, and the fixed shaft is rotatably connected in the corresponding perforated plate. This allows the cabinet door to rotate around the fixed shaft as the axis to achieve the opening and closing action. The polygonal limit block provides the condition for the limit shaft to restrict the rotation of the fixed shaft.
[0008] As a further optimization of this utility model, two sliding grooves are provided on the inner side of the guide sleeve, and a limiting groove with the same shape as the transverse cross section of the limiting block is provided on the upper end of the limiting shaft. Two sliders are fixedly connected to the outer side of the limiting shaft, and one side of the slider is also slidably connected in the corresponding sliding groove. This enables the vertical movement of the limiting shaft in the guide sleeve. The sliding connection of one side of the slider in the sliding groove can limit the movement of the limiting shaft and prevent the limiting shaft from falling out of the guide sleeve.
[0009] As a further optimization of this utility model, the first connecting rod is arc-shaped, one end of the first connecting rod is rotatably connected to the first connecting block, and the other end of the first connecting rod is rotatably connected to the second connecting block. When the pedal is stepped on, the pedal drives one end of the support plate to rotate on the base plate, and the pedal drives the crank to rotate through the transmission of the second connecting block, the first connecting rod and the first connecting block.
[0010] As a further optimization of this utility model, a fixing block is fixedly connected to the end of the rotating shaft away from the first connecting block, and a tension spring is movably connected to the lower side of the column. This allows the rotating shaft to be reset and rotated by the force of the tension spring after the pedal is released, thereby resetting the first connecting block and the crank.
[0011] As a further optimization of this utility model, one end of the crank is rotatably connected to a second connecting rod, and the other end of the second connecting rod is rotatably connected to the lower end of the limiting shaft. When the rotating shaft drives the crank to rotate, the crank pushes the limiting shaft upward in the guide sleeve through the second connecting rod, so that the limiting groove at the upper end of the limiting shaft is inserted into the limiting block at the lower end of the fixed shaft. This allows the cabinet door to be limited when a person steps on the pedal to work. When the person leaves the pedal, the tension spring and the fixed block pull the column to reset and rotate, thereby allowing the crank and the second connecting rod to move the limiting shaft downward and contact the limiting block, so that the cabinet door can be automatically closed by the spring rebound force.
[0012] Compared with the prior art, the present invention has the following beneficial effects: In this invention, during maintenance, when the operator steps on the pedal, the transmission structure, including the rotating shaft, the first connecting rod, and the second connecting rod, drives the limiting shaft upward, causing its limiting groove to fit against the limiting block and fix the cabinet door. This ensures that the cabinet door can be opened stably during maintenance and facilitates operation. When the operator leaves the pedal, the tension spring will drive the rotating shaft to reset, causing the limiting shaft to separate from the limiting block on the fixed shaft. At this time, the deformed spring sheet will release its rebound potential energy, pushing the cabinet door to close automatically, preventing external dust, moisture, and debris from entering the cabinet. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of the main structure of this utility model; Figure 2 This is a side view of the cabinet of this utility model; Figure 3 This is a sectional view of a portion of the cabinet door, guide sleeve, and limiting shaft of this utility model; Figure 4 for Figure 1 Enlarged view of point A in the middle.
[0014] In the diagram: 1. Cabinet body; 2. Cabinet door; 3. Perforated plate; 4. Fixed shaft; 5. Guide sleeve; 6. Limiting shaft; 7. Pressure mechanism; 8. Base plate; 9. Support plate; 10. Pedal; 11. Column; 12. Rotating shaft; 13. First connecting block; 14. First connecting rod; 15. Crank; 16. Limiting block; 17. Slide groove; 18. Limiting groove; 19. Sliding block; 20. Fixed block; 21. Tension spring; 22. Second connecting block; 23. Second connecting rod; 24. Lock; 25. Spring plate. Detailed Implementation
[0015] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.
[0016] like Figures 1-4As shown, the present invention provides a self-locking structure for a switch cabinet door, comprising a cabinet body 1, a plurality of perforated plates 3 fixedly connected to the cabinet body 1, a cabinet door 2 movably connected between two vertically oriented perforated plates 3, a guide sleeve 5 fixedly connected to the lower end of each of the two perforated plates 3, a limit shaft 6 inserted inside the guide sleeve 5, a pressure mechanism 7 located below the guide sleeve 5, the pressure mechanism 7 comprising a base plate 8 fixedly connected to the front side of the cabinet body 1, a support plate 9 rotatably connected to the base plate 8, a pedal 10 fixedly connected between two support plates 9, a plurality of second connecting blocks 22 fixedly connected to one side of the pedal 10 relative to the cabinet body 1, a column 11 fixedly connected to the base plate 8 near the pedal 10, a rotating shaft 12 rotatably connected inside the column 11, a first connecting block 13 fixedly connected to one end of the rotating shaft 12, a first connecting rod 14 movably connected between the first connecting block 13 and the second connecting block 22, and a crank 15 fixedly connected to the rotating shaft 12 located between the column 11 and the first connecting block 13.
[0017] like Figures 1-2 As shown, several spring plates 25 are fixedly connected to one side of the cabinet 1 near the cabinet door 2. After the cabinet door 2 is opened, the spring plates 25 can be compressed and deformed, thereby achieving the function of automatically closing the cabinet door 2 without being restricted by external force by means of the rebound force of the spring plates 25 after deformation. A lock 24 is fixedly connected inside the cabinet door 2.
[0018] like Figure 1 , Figures 3-4As shown, fixed shafts 4 are fixedly connected to the upper and lower ends of cabinet door 2 near the cabinet body 1. A limiting block 16 is fixedly connected to the end of the fixed shaft 4 away from cabinet door 2. The limiting block 16 has a polygonal cross-section, and the fixed shaft 4 is rotatably connected to the corresponding perforated plate 3, allowing cabinet door 2 to rotate around the fixed shaft 4 to achieve opening and closing. The polygonal limiting block 16 provides a condition for limiting shaft 6 to restrict the rotation of the fixed shaft 4. Two sliding grooves 17 are opened on the inner side of the guide sleeve 5, and a limiting groove 18 with the same shape as the transverse cross-section of the limiting block 16 is opened on the upper end of the limiting shaft 6. The outer side of the limiting shaft 6 is fixedly connected to... Two sliders 19 are connected, with one side of each slider 19 slidably connected to a corresponding groove 17. This allows the limiting shaft 6 to move vertically within the guide sleeve 5. The sliding connection of one side of the slider 19 to the groove 17 restricts the movement of the limiting shaft 6, preventing it from detaching from the guide sleeve 5. The first connecting rod 14 is arc-shaped, with one end rotatably connected to the first connecting block 13 and the other end rotatably connected to the second connecting block 22. When the pedal 10 is stepped on, the pedal 10 causes one end of the support plate 9 to rotate on the base plate 8, allowing the pedal 10 to pass through... The crank 15 is driven to rotate by the transmission of the second connecting block 22, the first connecting rod 14, and the first connecting block 13. A fixing block 20 is fixedly connected to the end of the rotating shaft 12 away from the first connecting block 13. A tension spring 21 is movably connected to the fixing block 20 and the lower side of the column 11. Therefore, after releasing the pedal 10, the force of the tension spring 21 enables the rotating shaft 12 to return to its original position, thus resetting the first connecting block 13 and the crank 15. One end of the crank 15 is rotatably connected to the second connecting rod 23, and the other end of the second connecting rod 23 is rotatably connected to the lower end of the limiting shaft 6. When the rotating shaft 12... When crank 15 rotates, crank 15 pushes the limiting shaft 6 upward in the guide sleeve 5 through the second connecting rod 23, so that the limiting groove 18 at the upper end of the limiting shaft 6 can be inserted into the limiting block 16 at the lower end of the fixed shaft 4. This allows the cabinet door 2 to be limited when a person steps on the pedal 10 to work. When the person leaves the pedal 10, the tension spring 21 and the fixed block 20 pull the column 11 to reset and rotate. This allows crank 15 and the second connecting rod 23 to move the limiting shaft 6 downward, releasing the limitation on the limiting block 16, and allowing the cabinet door 2 to close automatically with the help of the spring plate 25.
[0019] It should be noted that this utility model is a self-locking structure for a switch cabinet door. The operator must first unlock the door 2 using the lock 24, and then rotate the door 2 outwards. During the rotation of the door 2, the fixed shafts 4 at its upper and lower ends will rotate synchronously with the perforated plate 3 as support. Simultaneously, the door 2 will compress the spring sheet 25 on one side of the cabinet body 1, causing the spring sheet 25 to deform and store rebound potential energy. Then, the operator needs to enter the maintenance state by stepping on the pedal 10 with both feet. After the pedal 10 is subjected to force, it will drive the bottom support plate 9 to rotate on the base plate 8. At this time, the second connecting block 22 on one side of the pedal 10 will move accordingly, and pull the first connecting block 13 through the first connecting rod 14. The connecting block 13 drives the rotating shaft 12 to rotate inside the column 11. When the rotating shaft 12 rotates, it will synchronously drive the crank 15 and the fixed block 20 to rotate. During the rotation of the fixed block 20, the tension spring 21 will be stretched, so that the tension spring 21 will also store potential energy. When the crank 15 rotates, it will push the limiting shaft 6 upward through the second connecting rod 23. The limiting shaft 6 moves upward inside the guide sleeve 5. During the movement, the slider 19 on its outer side will slide along the sliding groove 17 on the inner side of the guide sleeve 5. When the limiting groove 18 at the upper end of the limiting shaft 6 is inserted into the limiting block 16 at the end of the fixed shaft 4, the rotation of the fixed shaft 4 is restricted, thereby fixing the opening state of the cabinet door 2. The staff can safely carry out maintenance work on the electrical equipment inside the cabinet 1. After maintenance, the staff leaves pedal 10, and pedal 10 loses pressure. The tension spring 21 releases its potential energy to pull the fixed block 20 back to its original position. The fixed block 20 drives the rotating shaft 12 to rotate in the opposite direction. The rotating shaft 12 then drives the first connecting block 13 and crank 15 to return to their original positions. The first connecting block 13 pulls the second connecting block 22 through the first connecting rod 14, so that pedal 10 and support plate 9 return to their initial positions. When crank 15 returns to its original position, it pulls the limiting shaft 6 to move downward along the guide sleeve 5 through the second connecting rod 23. The limiting groove 18 separates from the limiting block 16, and the fixed shaft 4 regains its rotational capacity. At this time, the spring plate 25 releases its rebound potential energy, pushing the cabinet door 2 to rotate in the opposite direction around the fixed shaft 4 until the cabinet door 2 fits against the cabinet body 1 to achieve automatic closing, thus completing the entire self-locking and closing process.
[0020] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.
Claims
1. A self-locking structure for the cabinet door of a switchgear, comprising a cabinet body (1), wherein the cabinet body (1) is fixedly connected with a plurality of perforated plates (3), characterized in that: A cabinet door (2) is movably connected between two vertically oriented perforated plates (3). Guide sleeves (5) are fixedly connected to the lower ends of the two perforated plates (3). A limit shaft (6) is inserted inside the guide sleeve (5). A pressure mechanism (7) is also provided on the cabinet body (1) located below the guide sleeve (5). The pressure mechanism (7) includes a base plate (8) fixedly connected to the front side of the cabinet body (1). A support plate (9) is rotatably connected to the base plate (8). A pedal (10) is fixedly connected between the two support plates (9). The pedal (10) is relative to... A number of second connecting blocks (22) are fixedly connected to one side of the cabinet (1). A column (11) is fixedly connected to the bottom plate (8) near the pedal (10). A rotating shaft (12) is rotatably connected inside the column (11). A first connecting block (13) is fixedly connected to one end of the rotating shaft (12). A first connecting rod (14) is movably connected between the first connecting block (13) and the second connecting block (22). A crank (15) is fixedly connected to the rotating shaft (12) located between the column (11) and the first connecting block (13).
2. The cabinet door self-locking structure of a switchgear according to claim 1, characterized in that: Several spring plates (25) are fixedly connected to one side of the cabinet (1) near the cabinet door (2).
3. The cabinet door self-locking structure of a switchgear according to claim 1, characterized in that: The cabinet door (2) is fixedly connected to a lock (24).
4. The cabinet door self-locking structure of a switchgear according to claim 1, characterized in that: The upper and lower ends of the cabinet door (2) are fixedly connected to a fixed shaft (4) near the cabinet body (1). The end of the fixed shaft (4) away from the cabinet door (2) is fixedly connected to a limit block (16). The transverse cross section of the limit block (16) is polygonal, and the fixed shaft (4) is rotatably connected in the corresponding perforated plate (3).
5. The cabinet door self-locking structure of a switchgear according to claim 1, characterized in that: The guide sleeve (5) has two sliding grooves (17) on its inner side. The upper end of the limiting shaft (6) has a limiting groove (18) with the same cross-sectional shape as the limiting block (16). Two sliders (19) are fixedly connected to the outer side of the limiting shaft (6). One side of the slider (19) is also slidably connected in the corresponding sliding groove (17).
6. The self-locking structure for the cabinet door of a switchgear according to claim 1, characterized in that: The first connecting rod (14) is arc-shaped. One end of the first connecting rod (14) is rotatably connected to the first connecting block (13), and the other end of the first connecting rod (14) is rotatably connected to the second connecting block (22).
7. The cabinet door self-locking structure of a switchgear according to claim 6, characterized in that: A fixing block (20) is fixedly connected to one end of the rotating shaft (12) away from the first connecting block (13), and a tension spring (21) is movably connected to the fixing block (20) and the lower side of the column (11).
8. The cabinet door self-locking structure of a switchgear according to claim 7, characterized in that: One end of the crank (15) is rotatably connected to a second connecting rod (23), and the other end of the second connecting rod (23) is rotatably connected to the lower end of the limiting shaft (6).