Safety interlocking device for drawer of switch cabinet

Abstract

The utility model relates to the technical field of power equipment safety protection, and particularly discloses a switch cabinet drawer safety interlocking device which comprises a transmission connecting piece, a fixing screw is in threaded connection with the outer portion of an installation piece, and a limiting mechanism comprises a supporting rod, a limiting plate, a groove, a spring and a limiting block. The limiting block is pressed to enter the groove, the spring is compressed, the limiting plate slides along the supporting rod to push the fixing screw rod, when the limiting plate crosses the limiting block, under the action of the spring, the limiting block moves and resets to stop movement of the limiting plate, and at the moment, the fixing screw rod is stopped by the limiting plate and cannot rotate; vibration generated by movement of the transmission connecting piece, rotation of the screw rod, opening and closing of a drawer and the like is effectively resisted, the fixing screw rod is prevented from loosening due to weakening of pre-tightening force, the stability of the mounting piece on the transmission connecting piece is ensured, then it is guaranteed that the connecting rod can smoothly enter the lock hole, the interlocking failure problem caused by loosening of the screw rod is avoided, and the reliability of the interlocking device is improved.

Description

Technical Field

[0001] This utility model relates to the field of electrical equipment safety protection technology, and in particular to a safety interlock device for switch cabinet drawers. Background Technology

[0002] The switchgear drawer safety interlock device is a safety protection device installed on the switchgear drawer. Through a mechanical linkage design, it prevents the drawer from being accidentally pulled out or closed due to improper operation or equipment running, thereby ensuring the safe operation of electrical equipment and the personal safety of operators. It has the following structure:

[0003] 1. Operating handle: Used for manual operation and transmitting action commands;

[0004] 2. Transmission connector: Used to connect the handle to the internal transmission structure to realize the transmission of force and action, so that the handle operation can be converted into the opening and closing of the circuit breaker;

[0005] 3. Interlocking components: including mounting parts, fixing screws, and connecting rods. The mounting parts slide on the transmission connector, and the fixing screws fix the mounting parts in a specific position on the transmission connector. As the operating handle is rotated, the transmission connector drives the mounting parts to rotate. At this time, the connecting rod is driven by the mounting parts to move up or down. When the connecting rod enters a lock hole in the switch cabinet drawer, the switch cabinet drawer is locked.

[0006] The interlocking components move along with the transmission connector. However, the screw of the fixed mounting part is affected by the vibration generated by the rotation and the vibration generated by the drawer opening and closing. The screw preload will be weakened, causing the screw to loosen. The loose screw will cause the mounting part to slide on the transmission connector, which will prevent the connecting rod from entering the lock hole smoothly, thus causing the interlocking to fail. Utility Model Content

[0007] To address the shortcomings of existing technologies, this utility model provides a safety interlock device for switch cabinet drawers. It solves the technical problem that the interlock-related components move with the transmission connecting parts, and the screw of the fixed mounting part is weakened by the vibration generated by the rotation of the screw and the vibration generated by the opening and closing of the drawer, which leads to the loosening of the screw. The loose screw causes the mounting part to slide on the transmission connecting parts, which prevents the connecting rod from smoothly entering the lock hole, thus causing the interlock to fail.

[0008] To achieve the above objectives, this utility model provides the following technical solution:

[0009] A safety interlock device for a switch cabinet drawer includes a transmission connector, an external mounting component slidably connected to the transmission connector, a threaded connection to the external mounting component with a fixing screw, and a limiting mechanism for preventing the rotation of the fixing screw on the external side of the mounting component. The limiting mechanism includes a support rod, a limiting plate, a groove, a spring, and a limiting block. The support rod is located on the external side of the mounting component, the limiting plate is slidably connected to the external side of the support rod, the groove is located at the end of the support rod away from the mounting component, the spring is fixedly connected inside the groove, and the limiting block is fixedly connected to the end of the spring and used to prevent the movement of the limiting plate.

[0010] Preferably, the mounting component has a slot on one side corresponding to the support rod, and the end of the support rod is engaged inside the slot.

[0011] Preferably: a support shaft is fixedly installed inside the groove, an opening is provided on the outside of the limiting block, a spring is movably sleeved on the outside of the support shaft, the limiting block is slidably connected to the outside of the support shaft through the opening, a baffle for limiting the movement range of the limiting block is fixedly installed on the outside of the limiting plate, and a buffer pad is fixedly installed on the outside of the baffle.

[0012] Preferably, the limiting plate has a through hole on its outside, and the limiting plate is slidably connected to the outside of the support rod through the through hole. A protective cover is fixedly installed on the side of the limiting plate near the fixing screw.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. After the fixed screw has rotated, press the limiting block to make it enter the groove. At this time, the spring is compressed, pushing the limiting plate along the support rod towards the fixed screw. When the limiting plate passes the limiting block, the limiting block moves back to its original position under the action of the spring to block the movement of the limiting plate. At this time, the fixed screw is blocked by the limiting plate and cannot rotate. This effectively resists the vibration generated by the movement of the transmission connecting parts, the rotation of the screw, and the opening and closing of the drawer, preventing the fixed screw from loosening due to the weakening of the preload. This ensures the stability of the mounting parts in the transmission connecting parts, thereby ensuring that the connecting rod can smoothly enter the lock hole, avoiding the interlock failure caused by the loosening of the screw, and improving the reliability of the interlocking device.

[0015] 2. When disassembling the limiting mechanism, first press the limiting block to make it enter the groove. Then push the limiting plate in the opposite direction to disengage the limiting plate from the support rod. Next, push the support rod to disengage the support rod from the slot. At this point, the limiting mechanism is disassembled, which improves the flexibility of the limiting mechanism. Attached Figure Description

[0016] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings.

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0018] Figure 2 This utility model Figure 1 Structural diagram of the middle limiting plate;

[0019] Figure 3 This utility model Figure 2 Bottom view of the central support rod;

[0020] Figure 4 This utility model Figure 1 Structural diagram of the central protective shield;

[0021] Figure 5 This utility model Figure 1 Enlarged structural diagram at point A in the middle.

[0022] Legend: 1. Transmission connector; 2. Mounting component; 3. Fixing screw; 4. Support rod; 5. Limiting plate; 6. Groove; 7. Spring; 8. Limiting block; 9. Slot; 10. Support shaft; 11. Opening; 12. Baffle; 13. Buffer pad; 14. Through hole; 15. Protective cover. Detailed Implementation

[0023] This application provides a safety interlock device for a switch cabinet drawer, which effectively solves the technical problem that the interlock-related components move with the transmission connector, and the screw of the fixed mounting part is weakened by the vibration generated by the rotation of the screw and the vibration generated by the drawer opening and closing, causing the screw to loosen. The loose screw causes the mounting part to slide on the transmission connector, which makes it impossible for the connecting rod to enter the lock hole smoothly, thus causing the interlock to fail. Example

[0024] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the technical solution in this application embodiment effectively solves the technical problem that the interlocking components move with the transmission connector, and the screw of the fixed mounting part is weakened by the vibration generated by the rotation and the vibration generated by the drawer opening and closing, causing the screw to loosen. The loose screw causes the mounting part to slide on the transmission connector, which prevents the connecting rod from smoothly entering the lock hole, thus causing the interlocking to fail. The overall idea is as follows:

[0025] To address the problems existing in the prior art, this utility model provides a safety interlock device for a switch cabinet drawer, including a transmission connector 1, an mounting component 2 slidably connected to the outside of the transmission connector 1, a fixing screw 3 threadedly connected to the outside of the mounting component 2, and a limiting mechanism for preventing the rotation of the fixing screw 3 provided on the outside of the mounting component 2. The limiting mechanism includes a support rod 4, a limiting plate 5, a groove 6, a spring 7, and a limiting block 8. The support rod 4 is located outside the mounting component 2, the limiting plate 5 is slidably connected to the outside of the support rod 4, the groove 6 is formed at the end of the support rod 4 away from the mounting component 2, the spring 7 is fixedly connected inside the groove 6, and the limiting block 8 is fixedly connected to the end of the spring 7 and is used to prevent the movement of the limiting plate 5.

[0026] The support rod 4 is a guide carrier for the sliding of the limiting plate 5, connecting the mounting part 2 and the limiting assembly. The limiting plate 5 restricts the rotation of the fixed screw 3 through sliding displacement. The groove 6 provides a space for the spring 7 and the limiting block 8, forming the structural foundation for the retractable limit block 8. The spring 7 provides a reset force for the limit block 8, driving the limit block 8 to pop out of the groove 6 to block the limiting plate 5. The limit block 8 controls the movement of the limiting plate 5, realizing the locking and unlocking of the blocking state of the fixed screw 3.

[0027] Mounting component 2 has a slot 9 on one side corresponding to support rod 4. The end of support rod 4 is engaged inside the slot 9. The slot 9 provides engagement and positioning for the end of support rod 4, enabling quick assembly of support rod 4 and mounting component 2. It also allows for quick disassembly and replacement of components during later maintenance, improving operation and maintenance efficiency.

[0028] A support shaft 10 is fixedly installed inside the groove 6. An opening 11 is provided on the outside of the limiting block 8. The spring 7 is movably sleeved on the outside of the support shaft 10. The limiting block 8 is slidably connected to the outside of the support shaft 10 through the opening 11, ensuring that the spring 7 maintains the deformation in the axial direction when compressed or stretched, and preventing the spring 7 from bending or becoming unstable.

[0029] A baffle 12 is fixedly installed on the outside of the limiting plate 5 to limit the movement range of the limiting block 8. A buffer pad 13 is fixedly installed on the outside of the baffle 12 to prevent the limiting block 8 from failing to limit due to excessive spring force of the spring 7.

[0030] The limiting plate 5 has a through hole 14 on its outside, and the limiting plate 5 is slidably connected to the outside of the support rod 4 through the through hole 14.

[0031] A protective cover 15 is fixedly installed on the side of the limiting plate 5 near the fixing screw 3. After the limiting plate 5 is in place, the protective cover 15 is fitted over the outside of the fixing screw 3 to form physical protection and can play a role in dust prevention.

[0032] Working principle:

[0033] First, after the fixing screw 3 has rotated, press the limiting block 8 so that the limiting block 8 enters the interior of the groove 6. At this time, the spring 7 is compressed, and the limiting plate 5 is pushed along the support rod 4 through the sliding fit between the through hole 14 and the support rod 4 towards the fixing screw 3. During the pushing process, the inner wall of the through hole 14 continuously presses the limiting block 8, maintaining its state of being housed in the groove 6, until the limiting plate 5 passes the position of the limiting block 8. At this time, under the action of the spring 7, the limiting block 8 moves back to its original position and contacts the baffle 12. At this time, the protective cover 15 is fitted over the outside of the fixing screw 3. At this time, the fixing screw 3 is blocked by the limiting plate 5 and cannot rotate. It is also protected by the protective cover 15 to avoid external interference. When it is necessary to pull the drawer of the switch cabinet, turn the operating handle. The operating handle drives the transmission connecting part 1 to rotate, and the transmission connecting part 1 drives the mounting part 2 to rotate. At this time, the connecting rod is driven by the mounting part 2 to move upward. When the connecting rod leaves the lock hole in the switch cabinet drawer, the unlocking is completed, and the switch cabinet drawer can be pulled.

[0034] The second step is to press the limiting block 8 to make it enter the groove 6. Then, push the limiting plate 5 in the opposite direction to disengage the limiting plate 5 from the support rod 4. Then, push the support rod 4 to disengage the support rod 4 from the slot 9. At this time, the limiting mechanism is disassembled.

[0035] Finally, it should be noted that the above embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the implementation. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A switch cabinet drawer safety interlocking device, comprising a transmission connecting piece (1), the outside of the transmission connecting piece (1) is slidingly connected with a mounting piece (2), the outside of the mounting piece (2) is threadedly connected with a fixing screw rod (3), characterized in that, The mounting component (2) is provided with a limiting mechanism on the outside to prevent the rotation of the fixing screw (3). The limiting mechanism includes a support rod (4), a limiting plate (5), a groove (6), a spring (7), and a limiting block (8). The support rod (4) is set outside the mounting part (2), the limiting plate (5) is slidably connected to the outside of the support rod (4), the groove (6) is opened at the end of the support rod (4) away from the mounting part (2), the spring (7) is fixedly connected inside the groove (6), and the limiting block (8) is fixedly connected to the end of the spring (7) and is used to block the movement of the limiting plate (5).

2. A safety interlock device for a switchgear drawer as claimed in claim 1, characterized in that, The mounting component (2) has a slot (9) on one side corresponding to the support rod (4); The end of the support rod (4) is engaged inside the slot (9).

3. A safety interlock device for a switchgear drawer as defined in claim 1, characterized in that, A support shaft (10) is fixedly installed inside the groove (6), and an opening (11) is provided on the outside of the limiting block (8). The spring (7) is movably sleeved on the outside of the support shaft (10), and the limiting block (8) is slidably connected to the outside of the support shaft (10) through the opening (11).

4. A safety interlock device for a switchgear drawer as defined in claim 1, characterized in that, The limiting plate (5) is externally fixedly equipped with a baffle (12) for limiting the movement range of the limiting block (8); Among them, a buffer pad (13) is fixedly installed on the outside of the baffle (12).

5. A safety interlock device for a switchgear drawer as defined in claim 1, characterized in that, The limiting plate (5) has a through hole (14) on its outside. The limiting plate (5) is slidably connected to the outside of the support rod (4) through the through hole (14).

6. A safety interlock device for a switchgear drawer as defined in claim 1, characterized in that, A protective cover (15) is fixedly installed on the side of the limiting plate (5) near the fixing screw (3).

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