A timed automatic door closing device

Abstract

The present invention discloses a timed automatic cabinet door closing device, comprising a cabinet body and a cabinet door, wherein the cabinet door is rotatably connected to the cabinet body, a rotating kit for closing the cabinet body is provided in the cabinet body, the rotating kit is fixedly connected to the cabinet body through a fixing frame, the rotating kit comprises a driving motor, a reel, a transmission belt, and a clutch device, the fixed end of the reel is rotatably connected to the fixing frame, one end of the transmission belt is fixedly wound around the reel shaft body, and the other end is fixedly connected to the inner side of the cabinet door; when the driving motor is working, the output shaft of the driving motor is connected to the free end of the reel through the clutch device; when the driving motor is not working, the clutch device has no transmission connection with the reel; a limit switch and a timing device connected to the control circuit of the rotating kit are also provided in the cabinet body.

Description

Technical Field

[0001] The invention relates to a timed automatic cabinet door closing device. Background Art

[0002] At present, outdoor terminal boxes and electric control cabinets are widely used in substations. During daily inspection and operation and maintenance, it is often necessary to open and close the cabinet doors. Often, due to negligence of personnel, the cabinet doors cannot be closed in time or are closed unreliably, causing rainwater to enter the electrical equipment in the cabinet during thunderstorms, causing electrical circuit short circuits or fires.

[0003] The existing automatic door closing technology mainly involves the use of hydraulic rods, racks and ropes to pull and close the cabinet doors, but all of them have shortcomings. In practical applications, there are more or less some problems, such as the hydraulic rod design causes increased resistance when manually opening and closing the door, the rack design affects the angle of the door opening, resulting in a limited range of cabinet door opening and closing positions, and the rope design causes the rope to sag in practical applications, and the manual door opening and closing and electric door closing cannot be separated in the mechanism. When the door is manually opened and closed, the reverse current generated by the driving motor reverses, which will affect the electric mechanism and the electrical circuit. Therefore, it is very necessary to design a timed automatic door closing device to overcome the shortcomings of the existing automatic door closing technology, while meeting the normal opening and closing of the cabinet door during operation and maintenance work, and being able to reliably close the cabinet door according to the set time after the work is completed. Utility Model Content

[0004] The main purpose of the present invention is to provide a timed automatic door closing device, which overcomes the shortcomings of the prior art and can automatically close the door. When the door is opened, the drive motor has no return power, the closing resistance is small, and the transmission belt has no sagging.

[0005] To achieve the above object, the technical solution adopted by the present invention is:

[0006] A timed automatic door closing device comprises a cabinet body and a cabinet door, wherein the cabinet door is rotatably connected to the cabinet body, a rotating kit for closing the cabinet body is arranged in the cabinet body, the rotating kit is fixedly connected to the cabinet body through a fixing frame, the rotating kit comprises a driving motor, a reel, a transmission belt, and a clutch device, the fixed end of the reel is rotatably connected to the fixing frame, one end of the transmission belt is fixedly wound around the reel shaft body, and the other end is fixedly connected to the inner side of the cabinet door;

[0007] When the driving motor is working, the output shaft of the driving motor is connected to the free end of the reel through the clutch device;

[0008] When the driving motor is not working, there is no transmission connection between the clutch device and the reel;

[0009] The cabinet is also provided with a limit switch and a timing device connected to the control circuit of the rotating kit;

[0010] When the cabinet door is fully closed, the limit switch disconnects the power supply of the timing device;

[0011] When the cabinet door is opened, the limit switch connects the power supply of the timing device, and the timing device starts timing. After the set time, the control circuit first controls the clutch device to connect the output shaft of the drive motor and the reel, and then controls the drive motor to rotate, so that the reel rotates to tighten the transmission belt and close the cabinet door.

[0012] Furthermore, the timing device is a time relay.

[0013] Furthermore, the clutch device comprises a connecting member A, a connecting sleeve, a connecting member B, and a driving member, which are coaxially arranged in a vertical direction and fixedly connected to the reel, and the driving member is fixedly connected to the fixing frame;

[0014] When the driving motor is not working, the connecting sleeve and the connecting piece A are in a separated state, and the connecting sleeve and the connecting piece B are in a combined state;

[0015] Before the driving motor is about to work, the driving member drives the connecting sleeve to make it in a combined state with the connecting member A and the connecting member B;

[0016] After the connection sleeve is finished working, the output shaft of the driving motor drives the reel to rotate through the connection sleeve to tighten the transmission belt and close the cabinet door.

[0017] Further, the driving member is an electromagnet coil, which is fixedly connected to the fixing frame, and the connecting sleeve is made of an electromagnet shaft;

[0018] The free end of the reel is plugged and fixed with a connector A, the connector A includes a connector body A, the center of the connector body A is provided with a socket A for the reel to be plugged and fixed, the diameter of the end of the connector body A close to the connecting sleeve is smaller than the diameter of the end away from the connecting sleeve, and an upper pin is fixedly connected to the outer wall, and the upper pin is provided with a chamfered surface at one end close to the connecting sleeve;

[0019] A connector B is plugged and fixed at the free end of the rotating shaft of the driving motor, and the connector B includes a connector body B, and a socket B is provided at the center of the connector body B for the rotating shaft to be plugged and fixed, and the diameter of the end of the connector body B close to the connecting sleeve is smaller than the diameter of the end away from the connecting sleeve, and a lower pin is fixedly connected to the outer wall, and a chamfered surface is provided on the end of the lower pin close to the connecting sleeve;

[0020] The movable part of the connecting sleeve located in the electromagnetic coil is a solid, and its two ends are respectively sleeved on the connecting parts A and B. The upper block and the lower block that match the upper pin and the lower pin respectively are fixedly connected to the inner walls close to the connecting parts A and B. The upper block and the lower block are both provided with beveled surfaces, and the vertical projection height of the beveled surface of the lower block is greater than the vertical projection height of the beveled surface of the upper block. When the driving part is not working, the upper block has no contact with the upper pin, and the lower block fits with the beveled surface of the lower pin; when the driving part is working, the upper block and the edge of the upper pin abut against each other, and the lower block and the beveled surface of the lower pin abut against each other.

[0021] Furthermore, the upper block and the lower block beveled surfaces are arranged in opposite directions.

[0022] Furthermore, the bevel angle α of the beveled surface is 30-60°.

[0023] Furthermore, the transmission belt is made of nylon.

[0024] Furthermore, the normally closed contact SK of the limit switch 50 is connected in series with the time relay coil SJ and then connected to the power supply; the normally open contact SJ1 of the time relay is connected in series with the electromagnet coil DN and then connected to the power supply; the normally open contact SJ2 of the time relay is connected in series with the motor coil M and then connected to the power supply.

[0025] Furthermore, a rotating device is provided, which is fixedly connected to the shaft body of the reel. The rotating device accumulates force when the cabinet door is opened, and controls the reel to rotate after the cabinet door is opened or when the cabinet door is manually closed, so that the transmission belt is in a tightened state.

[0026] Furthermore, the rotating device is a coil spring, the outer ring end of the coil spring is fixed to the inner wall of the installation box, the inner ring end is fixed to the reel, and the installation box is fixedly connected to the fixing frame.

[0027] One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:

[0028] The present invention has a simple structure and can realize automatic closing of the cabinet door. At the same time, by setting a connecting sleeve, it can be prevented that the driving motor reverses and generates current when the transmission belt is pulled, which affects the components in the electrical cabinet. At the same time, the coil spring can be provided to prevent the transmission belt from getting hung when the cabinet door is opened or manually closed, or getting entangled with the connecting wires in the electrical cabinet. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the structure of the present invention.

[0030] Figure 2 Schematic diagram of the structure inside the rotation kit.

[0031] Figure 3 Schematic diagram of the internal cross-sectional structure of the rotating kit.

[0032] Figure 4 Schematic diagram of the structure of connecting piece A.

[0033] Figure 5 Schematic diagram of the structure of connector B.

[0034] Figure 6 Schematic diagram of the cross-sectional structure of the connecting sleeve.

[0035] Figure 7 Schematic diagram of the electrical control circuit structure. DETAILED DESCRIPTION

[0036] like Figures 1 to 6 As shown, a timed automatic door closing device comprises a cabinet body 10 and a cabinet door 20, wherein the cabinet door 20 is rotatably connected to the cabinet body 10, a rotating kit 30 for closing the cabinet body 10 is provided in the cabinet body 10, the rotating kit 30 is fixedly connected to the cabinet body 10 through a fixing frame 302, the rotating kit 30 comprises a driving motor 301, a reel 303, a transmission belt 40, and a clutch device, the fixed end of the reel 303 is rotatably connected to the fixing frame 302, one end of the transmission belt 40 is fixedly wound around the shaft body of the reel 303, and the other end is buckled (other fixing methods are also acceptable) and fixedly connected to the inner side of the cabinet door 20;

[0037] When the driving motor 301 is working, the output shaft of the driving motor 301 is connected to the free end of the reel 303 through the clutch device;

[0038] When the driving motor 301 is not working, there is no transmission connection between the clutch device and the reel 303;

[0039] The cabinet 10 is also provided with a limit switch 50 and a timing device 60 connected to the control circuit of the rotating kit 30;

[0040] When the cabinet door 20 is fully closed, the limit switch 50 disconnects the power supply of the timing device 60;

[0041] When the cabinet door 20 is opened, the limit switch 50 connects the power supply of the timing device 60, and the timing device 60 starts timing. After the set time, the control circuit first controls the clutch device to drive the output shaft of the drive motor 301 and the reel 303, and then controls the drive motor 301 to rotate, so that the reel 303 rotates to tighten the transmission belt 40 to close the cabinet door 20.

[0042] Specifically, by setting the limit switch 50, when the cabinet door is opened, the timing device 60 is energized and starts timing. After the set time, the clutch device is controlled to transmit and connect the output shaft of the drive motor 301 and the reel 303, and then the drive motor 301 is started to rotate, so that the reel 303 rotates to tighten the transmission belt 40 to close the cabinet door 20. When the limit switch 50 is in place, the control circuit power supply is cut off to realize automatic closing of the cabinet door 20. Due to the setting of the clutch device, the drive motor 301 does not work when the cabinet door 20 is opened, and the clutch device has no transmission connection with the reel 303, so that the rotating shaft of the drive motor 301 does not rotate in the opposite direction, and the drive motor 301 cannot generate a reverse working current, thereby avoiding affecting the electrical components in the electrical cabinet.

[0043] Furthermore, the timing device 60 is a time relay, and DH48s-s can be used.

[0044] Furthermore, the clutch device includes a connecting member A306 coaxially arranged in a vertical direction and fixedly connected to the reel 303, a connecting sleeve 304, a connecting member B307 fixedly connected to the output shaft of the driving motor 301, and a driving member 305, wherein the driving member 305 is fixedly connected to the fixing frame 302;

[0045] When the driving motor 301 is not working, the connecting sleeve 304 and the connecting piece A306 are in a separated state, and the connecting sleeve 304 and the connecting piece B307 are in a combined state;

[0046] Before the driving motor 301 is about to work, the driving member 305 drives the connecting sleeve 304 to be in a combined state with the connecting member A 306 and the connecting member B 307;

[0047] After the connection sleeve 304 has completed its work, the output shaft of the driving motor 301 drives the reel 303 to rotate through the connection sleeve 304 to tighten the transmission belt 40 and close the cabinet door.

[0048] Specifically, before the driving motor 301 is about to work, the driving member 305 drives the connecting sleeve 304 and the connecting members A306 and B307 to be in a combined state, which can effectively avoid collision and damage between the connecting sleeve 304 and the connecting member A306 when the driving motor rotates.

[0049] Further, the driving member 305 is an electromagnet coil, fixedly connected to the fixing frame 302, and the connecting sleeve 304 is made of an electromagnet shaft;

[0050] The free end of the reel 303 is plugged and fixed with a connector A306, the connector A306 includes a connector A3061, the center of the connector A3061 is provided with a socket A3062 for the reel 303 to be plugged and fixed, the diameter of the end of the connector A3061 close to the connecting sleeve is smaller than the diameter of the end away from the connecting sleeve, and an upper pin 3063 is fixedly connected to the outer wall, and the upper pin 3063 is provided with a chamfered surface at the end close to the connecting sleeve 304;

[0051] The free end of the rotating shaft of the driving motor 301 is plugged and fixed with a connecting piece B307, and the connecting piece B307 includes a connecting body B3071, and a plug hole B3072 is provided at the center of the connecting body B3071 for the rotating shaft to be plugged and fixed, and the diameter of the end of the connecting body B3071 close to the connecting sleeve is smaller than the diameter of the end away from the connecting sleeve, and a lower pin 3073 is fixedly connected to the outer wall, and a chamfered surface is provided on the end of the lower pin 3073 close to the connecting sleeve 304;

[0052] The movable part of the connecting sleeve 304 located in the electromagnetic coil is a solid body, and its two ends are respectively sleeved on the connecting parts A306 and B307. The upper block 3041 and the lower block 3042 matching the upper pin 3063 and the lower pin 3073 are fixedly connected to the inner walls close to the connecting parts A306 and B307 respectively. The upper block 3041 and the lower block 3042 are both provided with beveled surfaces, and the vertical projection height of the beveled surface of the lower block 3042 is greater than the vertical projection height of the beveled surface of the upper block 3041. When the driving member 305 is not working, the upper block 3041 has no contact with the upper pin 3063, and the lower block 3042 fits with the beveled surface of the lower pin 3073; when the driving member 305 is working, the upper block 3041 and the edges of the upper pin 3063 abut against each other, and the beveled surfaces of the lower block 3042 and the lower pin 3073 abut against each other.

[0053] Specifically, the number of upper block 3041, upper pin 3063, lower block 3042 and lower pin 3073 is the same, at least one, and when there are multiple, they are evenly distributed along the circumference on connector A3061, connector B3071 and connecting sleeve 304, by installing connector A306 and connector B307 on the reel 303 and the rotating shaft respectively, upper pin 3063 and lower pin 3073 are respectively arranged on connector A306 and connector B307, and upper block 3041 and lower block 3042 matching with upper pin 3063 and lower pin 3073 are respectively arranged on the connecting sleeve 304 of the electromagnet, when the electromagnet coil is not energized, the top end of the upper block 3041 of the connecting sleeve 304 is separated from the bottom end of the upper pin 3063 of the reel, and the distance between the two is 0.1~0 .5 cm, preferably 0.2 cm, to avoid transmission between the reel 303 and the connecting sleeve 304, the connecting sleeve 304 passes through the electromagnetic coil, and the connecting sleeve 304 at the position of the electromagnetic coil is a solid. When the electromagnet coil is energized, the electromagnetic coil will provide an upward force to the connecting sleeve 304, and the upper block 3041 of the connecting sleeve 304 will be stuck into the upper pin 3063 of the reel 303. Since the vertical projection height of the beveled surface of the lower block 3042 is greater than the vertical projection height of the beveled surface of the upper block 3041, it is ensured that after the connecting sleeve 304 is pushed up, the upper block 3041 is engaged with the upper pin 3063, and the lower block 3042 is vertically overlapped with the beveled surface of the lower pin 3073, thereby ensuring that the reel 303, the connecting sleeve 304 and the rotating shaft of the drive motor 301 are connected to achieve transmission.

[0054] Furthermore, the chamfered surfaces of the upper block 3041 and the lower block 3042 are arranged in opposite directions. The chamfered surfaces of the upper block 3041 and the lower block 3042 are arranged in opposite directions, so that the lower block 3042 can contact the chamfered surface between the lower pin 3073 when the driving motor rotates, which has a certain upward thrust for the connecting sleeve 304, while the upper block 3041 has a better thrust when it contacts the right angle side of the upper pin 3063.

[0055] Furthermore, the bevel angle α of the beveled surface is 30-60°, and preferably 45° during specific production.

[0056] Further, the transmission belt 40 is made of nylon. Compared with ordinary transmission belts, nylon has better toughness.

[0057] Furthermore, a rotating device 70 is provided, and the rotating device 70 is fixedly connected to the shaft body of the reel 303. The rotating device 70 accumulates force when the cabinet door 20 is opened, and controls the reel 303 to rotate after the cabinet door 20 is opened or when the cabinet door 20 is manually closed, so that the transmission belt 40 is in a tightened state. The rotating device 70 is a coil spring, and the outer ring end of the coil spring is fixed to the inner wall of the installation box 701, and the inner ring end is fixed to the reel 303. The installation box 701 is fixedly connected to the fixed frame 302.

[0058] Specifically, by setting up a rotating device 70, force is accumulated when the cabinet door is opened, and the reel 303 is controlled to rotate after the cabinet door 20 is opened or when the cabinet door 20 is manually closed, ensuring that the transmission belt 40 is in a tightened state, preventing the transmission belt 40 from being entangled in the electrical cabinet, and preventing abnormal failure when the cabinet door is opened next time, thereby avoiding safety hazards. When the door is closed, that is, the transmission belt 40 is pulled out the shortest, the coil spring energy storage is the smallest; when the door is opened to the maximum, that is, the transmission belt is pulled out the longest, the coil spring energy storage is the largest, ensuring that during the process of opening and closing the door, the excess transmission belt 40 exposed outside can be returned to its position and wound into the belt box, wherein the winding spring rewinding force is not sufficient to close the cabinet door.

[0059] Electrical control circuits such as Figure 7 As shown, the limit switch 50 can adopt (WLD3). In the circuit connection, the normally closed contact SK of the limit switch 50 is connected in series with the time relay coil SJ and then connected to the power supply; when the cabinet door 20 is fully closed, the normally closed contact SK of the limit switch is disconnected, and the time relay coil SJ is not energized; the normally open contact 1 SJ1 of the time relay is connected in series with the electromagnet coil DN and then connected to the power supply, and the normally open contact 2 SJ2 of the time relay is connected in series with the motor coil M and then connected to the power supply, wherein the setting time of the contact SJ1 is 2~5S earlier than the working time of the contact SJ2. When the cabinet door 20 is opened, the normally closed contact SK of the limit switch 50 is closed, and the time relay coil SJ is energized. After the set time (the set time can be adjusted according to actual experience), the time relay contact SJ1 is closed, the electromagnetic coil DN is energized, and the connecting sleeve 304 moves upward. The connecting sleeve 304 and the connecting parts A306 and B307 are all in a combined state. After 3S, the time relay contact SJ2 is closed, and the drive motor 301 rotates, thereby driving the reel 303 to rotate through the connecting sleeve 304, tightening the transmission belt 40 to close the cabinet door 20 (the specific installation and circuit connection method of the time relay, limit switch, etc. are existing public known technologies and will not be elaborated in detail here).

Claims

1. A timed automatic door closing device, comprising a cabinet body (10) and a cabinet door (20), wherein the cabinet door (20) is rotatably connected to the cabinet body (10), characterized in that: A rotating kit (30) for closing the cabinet (10) is provided in the cabinet (10); the rotating kit (30) is fixedly connected to the cabinet (10) via a fixing frame (302); the rotating kit (30) comprises a driving motor (301), a reel (303), a transmission belt (40), and a clutch device; a fixed end of the reel (303) is rotatably connected to the fixing frame (302); one end of the transmission belt (40) is fixedly wound around the shaft of the reel (303), and the other end is fixedly connected to the inner side of the cabinet door (20); When the driving motor (301) is working, the output shaft of the driving motor (301) is connected to the free end of the reel (303) through the clutch device; When the driving motor (301) is not working, there is no transmission connection between the clutch device and the reel (303); The cabinet (10) is also provided with a limit switch (50) and a timing device (60) connected to the control circuit of the rotating kit (30); When the cabinet door (20) is fully closed, the limit switch (50) disconnects the power supply of the timing device (60); When the cabinet door (20) is opened, the limit switch (50) switches on the power supply of the timing device (60), and the timing device (60) starts timing. After the set time has passed, the control circuit first controls the clutch device to drive and connect the output shaft of the drive motor (301) and the reel (303), and then controls the drive motor (301) to rotate, thereby causing the reel (303) to rotate and tighten the drive belt (40) to close the cabinet door (20). The clutch device comprises a connecting member A (306) coaxially arranged in a vertical direction and fixedly connected to the reel (303), a connecting sleeve (304), a connecting member B (307) fixedly connected to the output shaft of the driving motor (301), and a driving member (305); the driving member (305) is fixedly connected to the fixing frame (302); When the driving motor (301) is not working, the connecting sleeve (304) and the connecting member A (306) are in a separated state, and the connecting sleeve (304) and the connecting member B (307) are in a combined state; Before the driving motor (301) is about to start working, the driving member (305) drives the connecting sleeve (304) to make it in a combined state with the connecting member A (306) and the connecting member B (307); After the connection sleeve (304) has completed its operation, the output shaft of the driving motor (301) drives the reel (303) through the connection sleeve (304) to rotate and tighten the transmission belt (40) to close the cabinet door. The driving member (305) is an electromagnet coil, which is fixedly connected to the fixing frame (302); the connecting sleeve (304) is made of an electromagnet shaft; A connecting piece A (306) is plugged and fixed to the free end of the reel (303), the connecting piece A (306) comprising a connecting body A (3061), a plug hole A (3062) for plugging and fixing the reel (303) is provided at the center of the connecting body A (3061), the diameter of the end of the connecting body A (3061) close to the connecting sleeve (304) is smaller than the diameter of the end away from the connecting sleeve (304), and an upper pin (3063) is fixedly connected to the outer wall, and a chamfered surface is provided at the end of the upper pin (3063) close to the connecting sleeve (304); A connecting piece B (307) is plugged and fixed to the free end of the rotating shaft of the driving motor (301), the connecting piece B (307) comprising a connecting body B (3071), a plug hole B (3072) for plugging and fixing the rotating shaft is provided at the center of the connecting body B (3071), the diameter of the end of the connecting body B (3071) close to the connecting sleeve (304) is smaller than the end away from the connecting sleeve (304), and a lower pin (3073) is fixedly connected to the outer wall, and a chamfered surface is provided at the end of the lower pin (3073) close to the connecting sleeve (304); The movable part of the connecting sleeve (304) located in the electromagnetic coil is a solid body, and its two ends are respectively sleeved on the connecting piece A (306) and the connecting piece B (307). An upper stopper (3041) and a lower stopper (3042) respectively matching the upper pin (3063) and the lower pin (3073) are respectively fixedly connected on the inner walls close to the connecting piece A (306) and the connecting piece B (307). The upper stopper (3041) and the lower stopper (3042) are both provided with an inclined surface, and the vertical direction of the inclined surface of the lower stopper (3042) is The projection height is greater than the vertical projection height of the beveled surface of the upper block (3041); when the driving member (305) is not working, the upper block (3041) and the upper pin (3063) have no contact, and the beveled surfaces of the lower block (3042) and the lower pin (3073) fit together; when the driving member (305) is working, the edges of the upper block (3041) and the upper pin (3063) abut against each other, and the beveled surfaces of the lower block (3042) and the lower pin (3073) abut against each other, and the beveled surfaces of the upper block (3041) and the lower block (3042) are arranged in opposite directions. A rotating device (70) is also provided, the rotating device (70) being fixedly connected to the shaft body of the reel (303), the rotating device (70) storing force when the cabinet door (20) is opened, and controlling the reel (303) to rotate after the cabinet door (20) is opened or when the cabinet door (20) is manually closed, so that the transmission belt (40) is in a tightened state.

2. A timed automatic door closing device according to claim 1, characterized in that: The timing device (60) is a time relay.

3. The timed automatic door closing device according to claim 1, characterized in that: The bevel angle α of the beveled surface is 30-60°.

4. The timed automatic door closing device according to claim 1, characterized in that: The transmission belt (40) is made of nylon.

5. The timed automatic door closing device according to claim 1, characterized in that: The normally closed contact SK of the limit switch (50) is connected in series with the time relay coil SJ and then connected to the power supply; the normally open contact 1 SJ1 of the time relay is connected in series with the electromagnet coil DN and then connected to the power supply; the normally open contact 2 SJ2 of the time relay is connected in series with the motor coil M and then connected to the power supply.

6. The timed automatic door closing device according to claim 1, characterized in that: The rotating device (70) is a coil spring, the outer ring end of the coil spring is fixed to the inner wall of the installation box (701), the inner ring end is fixed to the winding shaft (303), and the installation box (701) is fixedly connected to the fixing frame (302).

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