A turntable interlocking plug-in box

Abstract

When the lock pin is in the locked position, the locking pin is released, and the locking pin is locked, so that the locking pin is locked.

Description

Technical Field

[0001] The present invention relates to the technical field of busbar plug-in boxes, in particular to a turntable interlocking plug-in box. Background Art

[0002] In the prior art, the compact busbar plug-in box usually adopts the method of clamping the locking pin and the busbar cover (such as Figure 10 (as shown), achieving the effect of limiting the plugging and unplugging of the plug-in box. A simple limit interlock is provided between the lock pin and the plug-in box door panel, and the lock pin cannot be opened when the box door is closed. At the same time, the box door is controlled by the operating handle of the manual operating mechanism. Only when the handle is in the open position can the box door be opened, thereby achieving the purpose of preventing the plug-in and unplugging of the plug-in box when the switch is closed. However, with the deepening of the electrification of products, when we choose an electric operating mechanism, because the electric operation does not have an operating handle outside the box, the door can still be opened in the closed state. In this way, the ordinary box door interlock cannot be used under the premise of using electric operation. Against this background, we have redeveloped a plug-in box lock pin interlocking method. Summary of the Invention

[0003] The purpose of the present invention is to solve the deficiencies of the above-mentioned prior art and propose a turntable interlocking plug-in box, comprising a plug-in box body, an external interlocking part and an internal interlocking part, wherein the external interlocking part comprises a locking foot with a pin, a locking foot limiting plate, a rotating handle and a handle shaft, one end of the handle shaft is connected to the rotating handle, and the other end of the handle shaft passes through the locking foot limiting plate and the side wall of the plug-in box body, the handle shaft and the locking foot limiting plate are rigidly connected, the locking foot limiting plate is provided with an avoidance groove, the lower end of the locking foot with a pin is provided with a lock buckle that matches the busbar body, the middle part is rotatably connected to the side wall of the plug-in box body, and the upper end is provided with a pin that matches the avoidance groove;

[0004] The inner interlocking part includes a transmission shaft, an upper crank arm, a lower crank arm, and an upper and lower crank arm connecting rod. The transmission shaft is longitudinally arranged at the upper part of the plug-in box body. The middle part of the transmission shaft is rigidly connected to a trip pressing plate. The trip pressing plate is connected to a pressing contact, and the pressing contact faces the trip button of the electric operating mechanism.

[0005] One end of the upper crank arm is passed through the transmission shaft, and the other end is rotatably connected to the upper end of the upper and lower crank arm connecting rods. One end of the lower crank arm is rigidly connected to the handle shaft passed through the plug-in box body, and the other end is rotatably connected to the lower end of the upper and lower crank arm connecting rods.

[0006] In order to avoid unexpected factors such as vibration and ensure safety, the lock foot limit plate is further provided with a lower hanging lock ear, and the side wall of the plug-in box body is provided with an upper hanging lock ear; when the upper hanging lock ear overlaps and cooperates with the lower hanging lock ear, the pin and the avoidance groove are in a misaligned state, and the pin cannot enter the avoidance groove.

[0007] Furthermore, the upper padlock lug and the lower padlock lug are provided with a turntable padlock.

[0008] In order to facilitate the operation of the staff, preferably, the upper part of the pin locking foot is provided with a special-shaped limiting hole, and the special-shaped limiting hole is composed of a round hole and a waist-shaped hole.

[0009] In order to facilitate the disassembly, assembly and maintenance of the external interlocking part, preferably, the rotating handle is a star-shaped handle with threads at the axis, and is connected to the handle shaft through the threads of the star-shaped handle.

[0010] In order to facilitate disassembly and installation, preferably, the handle shaft is a square shaft rod, and a corresponding square hole is opened at the connection between the lower turning arm and the handle shaft.

[0011] Furthermore, when the locking foot limit plate is rotated 20° counterclockwise, the avoidance groove and the pin of the locking foot with the pin are at the same horizontal position.

[0012] Furthermore, when the transmission shaft rotates 20° counterclockwise, the pressing contact on the opening pressing plate presses the opening button.

[0013] Operation principle: In the present invention, when it is necessary to plug or unplug the plug-in box, it is necessary to first release the turntable padlock and rotate the rotary handle to rotate the lock foot limit plate driven by the handle shaft. When it is rotated to the specified position (about 20° counterclockwise), the pin at the upper end of the lock foot with a pin can enter the avoidance groove on the lock foot limit plate, and the lock buckle at the lower end of the lock foot with a pin can be disengaged from the busbar body; at the same time, due to the rotation of the handle shaft, the lower turning arm, the upper and lower turning arm connecting rods and the upper turning arm of the internal interlocking part are driven in turn. When the lock foot limit plate is rotated to the specified position (about 20° counterclockwise), the pressing contact on the opening pressing plate just presses the opening button of the electric operating mechanism, and the switch is in the opening state;

[0014] When the lock buckle with the pin locking foot is disengaged from the busbar body, the lock foot limit plate must be in the specified position and the pin with the pin locking foot must be stuck in the avoidance groove and locked. Therefore, the pressing contact on the trip pressing plate must also be locked in the state of pressing the trip button, ensuring that the switch is always in the trip state, thereby ensuring the safe plugging and unplugging of the plug-in box.

[0015] Beneficial effects: In the present invention, (1) the turntable interlocking mechanism is used to achieve the effect of automatic opening before unplugging the box and closing the switch only after plugging it into place, thereby ensuring the safety of the operator. Even if the operator forgets to open the switch due to negligence before operation, or mistakenly performs a closing operation during operation, it is impossible to enter the closed state.

[0016] (2) The use of a purely mechanical turntable interlocking structure can ensure the reliability of the equipment and also ensure the effectiveness of the interlocking mechanism in the event of electrical damage.

[0017] (3) It effectively adapts to the plug-in box body based on electric operation, and is relatively convenient to install and disassemble. There is no need to make major changes to the original plug-in box body. The cost is low and it is suitable for mass production. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional structural diagram of a turntable interlocking plug-in box;

[0019] Figure 2 yes Figure 1 A partial enlarged view of part A;

[0020] Figure 3 It is a side view of a turntable interlocking plug-in box;

[0021] Figure 4 yes Figure 3 Schematic cross-section of the middle BB section;

[0022] Figure 5 yes Figure 3 A top view of

[0023] Figure 6 It is a structural diagram showing the external interlocking part in a locked state;

[0024] Figure 7 yes Figure 6 Structural diagram of the internal interlocking part in the state;

[0025] Figure 8 It is a structural diagram showing the external interlocking part in the unlocked state;

[0026] Figure 9 yes Figure 8 Structural diagram of the internal interlocking part in the state;

[0027] Figure 10 It is a schematic diagram of the clamping structure between the locking pin and the busbar body in the background art;

[0028] In the figure: 1. Busbar body, 2. Plug-in box body, 3. Locking foot with pin, 4. Locking foot limit plate, 5. Rotating handle, 6. Lower turning arm, 7. Upper and lower turning arm connecting rod, 8. Upper turning arm, 9. Transmission shaft, 10. Disconnection pressure plate, 11. Electric operating mechanism, 12. Turntable padlock, 13. Avoidance groove, 14. Lock buckle 15, Pin, 16. Special-shaped limiting hole, 17. Press contact, 18. Handle shaft, 19. Disconnection button. DETAILED DESCRIPTION

[0029] In order to deepen the understanding of the present invention, the present invention will be further described in detail below with reference to embodiments and drawings. The embodiments are only used to explain the present invention and do not constitute a limitation on the scope of protection of the present invention.

[0030] like Figure 1-9 As shown, a turntable interlocking plug-in box comprises a plug-in box body 2, an external interlocking part and an internal interlocking part, wherein the external interlocking part comprises a locking foot 3 with a pin, a locking foot limiting plate 4, a rotating handle 5 and a handle shaft 18, one end of the handle shaft is connected to the rotating handle, and the other end of the handle shaft passes through the locking foot limiting plate 4 and the side wall of the plug-in box body 2, and the handle shaft and the locking foot limiting plate 4 are rigidly connected. The locking foot limiting plate is provided with an avoidance groove 13, the lower end of the locking foot 3 with a pin is provided with a lock buckle 14 that cooperates with the busbar body 1, the middle part is rotatably connected to the side wall of the plug-in box body 2, and the upper end is provided with a The pin 15 cooperates with the avoidance groove 13; the upper part of the pin lock foot 3 is provided with a special-shaped limiting hole 16, and the special-shaped limiting hole 16 is composed of a round hole and a waist-shaped hole; the rotating handle 5 is a star-shaped handle with a thread at the axis, and is connected to the handle shaft through the thread of the star-shaped handle 5; the lock foot limit plate 4 is provided with a lower padlock ear, and the side wall of the plug-in box body is provided with an upper padlock ear; when the upper padlock ear overlaps with the lower padlock ear, the pin 15 and the avoidance groove 13 are in a misaligned state, and the pin 15 cannot enter the avoidance groove 13; the upper padlock ear and the lower padlock ear are provided with a turntable padlock 12;

[0031] The internal interlocking part includes a transmission shaft 9, an upper crank arm 8, a lower crank arm 6, and an upper and lower crank arm connecting rod 7. The transmission shaft 9 is longitudinally arranged at the upper part of the plug-in box body 1. The middle part of the transmission shaft 9 is rigidly connected to a trip pressing plate 10. The trip pressing plate is connected to a pressing contact 17, which faces the trip button 19 of the electric operating mechanism 11.

[0032] One end of the upper crank arm 8 is inserted into the transmission shaft 9, and the other end is rotatably connected to the upper end of the upper and lower crank arm connecting rods 7. One end of the lower crank arm 6 is rigidly connected to the handle shaft 18 inserted into the plug-in box body, and the other end is rotatably connected to the lower end of the upper and lower crank arm connecting rods 7. The handle shaft is a square shaft, and a corresponding square hole is opened at the connection between the lower crank arm and the handle shaft.

[0033] In this embodiment, when the locking foot limit plate is rotated 20° counterclockwise, the avoidance groove and the pin of the locking foot with the pin are at the same horizontal position.

[0034] In this embodiment, when the transmission shaft rotates 20° counterclockwise, the pressing contact on the opening pressing plate presses the opening button.

[0035] Based on the above embodiment, the operation method of the present invention is as follows: Figure 6-9 As shown, when the plug-in or unplug-in box needs to be plugged in or out, the turntable padlock 12 needs to be released first, and the rotary handle 5 needs to be turned so that the lock foot limit plate 4 rotates under the drive of the handle shaft 18. When it rotates to the specified position (about 20° counterclockwise), the pin 15 at the upper end of the lock foot 3 with the pin can enter the avoidance groove 13 on the lock foot limit plate 4, and the lock buckle 14 at the lower end of the lock foot 3 with the pin can be disengaged from the busbar body 1; at the same time, due to the rotation of the handle shaft 18, the lower turning arm 6, the upper and lower turning arm connecting rods 7 and the upper turning arm 8 of the inner interlocking part are driven in sequence. When the lock foot limit plate 4 rotates to the specified position (about 20° counterclockwise), the pressing contact 17 on the opening pressing plate 10 just presses the opening button 19 of the electric operating mechanism 11, and the switch is in the opening state;

[0036] When the lock buckle 14 with the pin locking foot 3 is unlocked from the busbar body 1, the locking foot limit plate 4 must be in the specified position and the pin 15 with the pin locking foot 3 must be stuck in the avoidance groove 13 and locked. Therefore, the pressing contact 17 on the trip pressing plate must also be locked in the state of pressing the trip button 19, ensuring that the switch is always in the trip state, thereby ensuring the safe insertion and removal of the plug-in box.

[0037] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A turntable interlocking plug-in box, characterized in that: The utility model comprises a plug-in box body, an external interlocking part and an internal interlocking part, wherein the external interlocking part comprises a locking foot with a pin, a locking foot limiting plate, a rotating handle and a handle shaft, one end of the handle shaft is connected to the rotating handle, and the other end of the handle shaft passes through the locking foot limiting plate and the side wall of the plug-in box body, and the handle shaft and the locking foot limiting plate are rigidly connected, and the locking foot limiting plate is provided with an avoidance groove, the lower end of the locking foot with a pin is provided with a lock buckle that matches the busbar body, the middle part is rotatably connected to the side wall of the plug-in box body, and the upper end is provided with a pin that matches the avoidance groove; The inner interlocking part includes a transmission shaft, an upper crank arm, a lower crank arm, and an upper and lower crank arm connecting rod. The transmission shaft is longitudinally arranged at the upper part of the plug-in box body. The middle part of the transmission shaft is rigidly connected to a trip pressing plate. The trip pressing plate is connected to a pressing contact, and the pressing contact faces the trip button of the electric operating mechanism. One end of the upper crank arm is passed through the transmission shaft, and the other end is rotatably connected to the upper end of the upper and lower crank arm connecting rods; one end of the lower crank arm is rigidly connected to the handle shaft passing through the plug-in box body, and the other end is rotatably connected to the lower end of the upper and lower crank arm connecting rods; The locking foot limit plate is provided with a lower locking ear, and the side wall of the plug box body is provided with an upper locking ear; when the upper locking ear overlaps with the lower locking ear, the pin and the avoidance groove are in a misaligned state, and the pin cannot enter the avoidance groove; When the locking foot limit plate is rotated 20 degrees counterclockwise, the avoidance groove and the pin of the locking foot with the pin are at the same horizontal position.

2. A turntable interlocking plug-in box according to claim 1, characterized in that: The upper padlock lug and the lower padlock lug are provided with a rotary padlock.

3. The turntable interlocking plug-in box according to claim 1, characterized in that: When the transmission shaft rotates 20° counterclockwise, the pressing contact on the opening pressing plate presses the opening button.

4. The turntable interlocking plug-in box according to claim 1, characterized in that: The upper part of the pin locking foot is provided with a special-shaped limiting hole, and the special-shaped limiting hole is composed of a round hole and a waist-shaped hole.

5. The turntable interlocking plug-in box according to claim 1, characterized in that: The rotating handle is a star-shaped handle with threads at the axis, and is connected to the handle shaft through the threads of the star-shaped handle.

6. The turntable interlocking plug-in box according to claim 1, characterized in that: The handle shaft is a square shaft rod, and a corresponding square hole is provided at the connection between the lower turning arm and the handle shaft.

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