Locking device

Abstract

The locking device comprises a door frame, air door plates, an electric telescopic rod and a servo motor, a bottom frame is fixed to the bottom of the door frame, the air door plates are rotationally connected to the two ends of the door frame, a first inner cavity is formed in the upper portion of the door frame, and the servo motor is fixed to the top of the first inner cavity of the door frame; a rotating lead screw is fixed to the output end of the servo motor, and a movable plate is arranged below the rotating lead screw. According to the locking device, a movable plate can be driven to move downwards by rotating a lead screw, so that an upper locking block below the movable plate is clamped into an upper clamping groove above an air door plate, and meanwhile, when the movable plate moves downwards, a lifting plate is extruded downwards through an extrusion plate, so that the lifting plate rotates in a bottom frame through a rotating shaft; and a lower locking block on the surface of the lifting plate moves upwards to be clamped into a lower clamping groove below the air door plate, so that the air door plate is locked up and down at the same time, and the locking effect of the device is improved.

Description

Technical Field

[0001] The utility model relates to the technical field related to comprehensive mining of coal mines, in particular to a locking device. Background Art

[0002] Comprehensive coal mining is the entire production process of the coal mining face, including coal breaking, coal loading, coal transportation, support, goaf treatment, and return tunnel transportation and excavation. During the coal mining process, permanent wind walls need to be built in each connecting tunnel between the coal mine's intake and return air shafts and between the main intake and return air tunnels; at the same time, interlocked forward and reverse air doors are installed to avoid accidents. Therefore, the air door locking device is very important on the air door;

[0003] A locking device for a coal mine ventilation damper disclosed in the existing publication number CN211950031U comprises a main transmission device and a door panel device; a side transmission device is arranged at the other end of the main transmission device as a whole, and the whole of the side transmission device is symmetrical with the main transmission device; a door panel clamping device is arranged at the upper end of the door panel device as a whole, and the whole of the door panel clamping device is sleeved and fixed on the upper end of the door panel;

[0004] The above-mentioned document has a top card slot at the outside of the top of the door panel snap-in slot. The top card slot is to further facilitate the snap-in slot of the top door panel snap-in device to better snap the door, so that the whole forms a coherent movement. When one door is slowly opened, the other door will be locked. Only after the door is closed can the other door be opened, thereby achieving a mutual locking state of the ventilation damper;

[0005] However, the locking structure of the damper in the above document is only installed on the top of the damper. When encountering strong wind, the top of the damper is locked, but the bottom of the damper is locked, so it is still prone to safety hazards. In addition, it is not easy to position the damper after it is opened. During ventilation, the damper is easily swung by the wind. Therefore, we propose a locking device to solve the above problems. Utility Model Content

[0006] The purpose of the utility model is to provide a locking device to solve the problems raised by the above background technology.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a locking device, comprising a door frame, a damper plate, an electric telescopic rod and a servo motor, wherein a bottom frame is fixed to the bottom of the door frame, and both ends of the door frame are rotatably connected with the damper plates, a rubber pad is bonded to the inner end of the damper plate, an electric telescopic rod is fixed to the left and right ends of the upper surface of the door frame, and a connecting block is fixed to the bottom of the electric telescopic rod, a first inner cavity is opened above the door frame, and a servo motor is fixed to the top of the first inner cavity of the door frame, a rotating screw is fixed to the output end of the servo motor, a movable plate is arranged below the rotating screw, and an extrusion plate is fixed below the end of the movable plate, and the movable plate Upper locking blocks are fixed at both ends of the lower part, second inner cavities are opened at both ends of the left and right ends of the door frame, a first slot is opened inside the door frame between the second inner cavity and the first inner cavity, upper grooves are evenly opened on the upper surface of the damper plate, and a positioning groove is opened at the upper end of the damper plate, a lower groove is opened below the damper plate, a third inner cavity is opened inside the bottom frame, and third grooves are opened at both ends of the upper surface of the bottom frame, a second slot connected with the second inner cavity and the third inner cavity is opened at the bottom of the door frame, lifting plates are provided at both ends of the inside of the bottom frame, and the ends of the lifting plates are rotatably connected to the bottom frame through a rotating shaft, and a lower locking block is fixed to the upper surface of the inner end of the lifting plate.

[0008] Preferably, the connecting block below the electric telescopic rod is snap-fitted with the positioning groove at the upper inner end of the damper plate.

[0009] Preferably, the rotating screw and the movable plate are connected by threaded connection, and both ends of the movable plate pass through the first slot and are located inside the second inner cavity, and the width of the movable plate is equal to the width of the first slot.

[0010] Preferably, the upper locking blocks below the movable plate are engaged with the upper slots provided on the upper surface of the damper plate in a one-to-one correspondence, and three groups of upper locking blocks are provided at both left and right ends of the movable plate.

[0011] Preferably, the movable plate and the extrusion plate are vertically distributed, and the lower end surface of the extrusion plate is arranged to fit the upper end surface of the lifting plate end.

[0012] Preferably, the lifting plate is arranged in a folded line shape, and the end of the lifting plate close to the second inner cavity is connected to the bottom of the second inner cavity on the door frame through a spring.

[0013] Preferably, the lower locking block at the end of the lifting plate is snap-fitted with the lower slot below the damper plate, and the area of ​​the third slot on the surface of the bottom frame is larger than the cross-sectional area of ​​the lower locking block.

[0014] Compared with the prior art, the utility model has the following beneficial effects: the locking device,

[0015] The movable plate can be driven to move downward by rotating the screw rod, so that the upper locking block below the movable plate is inserted into the upper slot above the air door plate. At the same time, when the movable plate moves downward, it will press the lifting plate downward through the squeezing plate, so that the lifting plate rotates inside the bottom frame through the rotating shaft, so that the lower locking block on the surface of the lifting plate moves upward and is inserted into the lower slot below the air door plate, so that the upper and lower air door plates are locked at the same time, thereby improving the locking effect of the device;

[0016] The electric telescopic rod can be used in conjunction with the connecting block and the positioning groove at the upper end of the air flap plate, so that when the air flap plate is rotated to open, the connecting block and the positioning groove are engaged with each other to position the air flap plate, thereby improving the stability of the opening of the air flap plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the front view structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the front cross-sectional structure of the utility model;

[0019] Figure 3 This is a schematic diagram of the lifting plate structure of the utility model;

[0020] Figure 4 This is a schematic diagram of the open structure of the air door plate of the utility model.

[0021] In the figure: 1. door frame; 2. bottom frame; 3. damper plate; 4. rubber pad; 5. electric telescopic rod; 6. connecting block; 7. first inner cavity; 8. servo motor; 9. rotating screw; 10. movable plate; 11. upper locking block; 12. second inner cavity; 13. first slot; 14. extrusion plate; 15. upper slot; 16. positioning slot; 17. lower slot; 18. third inner cavity; 19. lifting plate; 20. lower locking block; 21. rotating shaft; 22. spring; 23. second slot; 24. third slot. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figure 1-4The utility model provides a technical solution: a locking device, including a door frame 1, a damper plate 3, an electric telescopic rod 5 and a servo motor 8. A bottom frame 2 is fixed to the bottom of the door frame 1, and both ends of the door frame 1 are rotatably connected with the damper plates 3. The inner ends of the damper plates 3 are bonded with rubber pads 4. Electric telescopic rods 5 are fixed to the left and right ends of the upper surface of the door frame 1, and a connecting block 6 is fixed to the bottom of the electric telescopic rod 5. The connecting block 6 below the electric telescopic rod 5 is engaged with the positioning groove 16 at the inner end of the upper end of the damper plate 3 to facilitate the positioning of the damper plate 3 after opening. A first inner cavity 7 is opened above the door frame 1, and a servo motor 8 is fixed to the top of the first inner cavity 7 of the door frame 1. A rotating screw 9 is fixed to the output end of the servo motor 8. The rotating screw A movable plate 10 is arranged below the rod 9, and the connection mode between the rotating screw rod 9 and the movable plate 10 is threaded connection, and the two ends of the movable plate 10 pass through the first slot 13 and are located inside the second inner cavity 12, and the width of the movable plate 10 is equal to the width of the first slot 13, and the movable plate 10 can slide downward on the first slot 13 by rotating the screw rod 9 and the movable plate 10 for threaded movement, and the upper locking block 11 below the movable plate 10 is arranged in a one-to-one corresponding engagement with the upper card slot 15 provided on the upper surface of the damper plate 3, and the upper locking blocks 11 at the left and right ends of the movable plate 10 are arranged in three groups, and the upper locking blocks 11 on the lower surface of the movable plate 10 can be inserted into the upper card slot 15 on the upper surface of the damper plate 3, so as to lock the damper plate 3 above;

[0024] See also Figure 1-4A pressing plate 14 is fixed below the end of the movable plate 10, and the movable plate 10 and the pressing plate 14 are vertically distributed, and the lower end surface of the pressing plate 14 is fitted with the upper end surface of the end of the lifting plate 19, and the movable plate 10 can move downward, so that the pressing plate 14 squeezes the lifting plate 19, so that the lifting plate 19 rotates inside the third inner cavity 18, and upper locking blocks 11 are fixed at both ends of the lower side of the movable plate 10, and the left and right ends of the door frame 1 are provided with a second inner cavity 12, and the interior of the door frame 1 is provided with a first slot 13 between the second inner cavity 12 and the first inner cavity 7, and the upper surface of the air flap plate 3 is evenly provided with upper card slots 15, and the upper end of the air flap plate 3 is provided with a positioning slot 16, and the lower end of the air flap plate 3 is provided with a lower card slot 17, and the third inner cavity 18 is provided inside the bottom frame 2, and the left and right ends of the upper surface of the bottom frame 2 are provided with third slots 24, and the door frame 1 A second slot 23 communicating with the second inner cavity 12 and the third inner cavity 18 is provided at the bottom of the bottom frame 2. Lifting plates 19 are provided at both ends of the interior of the bottom frame 2, and the ends of the lifting plates 19 are rotatably connected to the bottom frame 2 through a rotating shaft 21. A lower locking block 20 is fixed to the upper surface of the inner end of the lifting plate 19. The lifting plate 19 is arranged in a broken line shape, and the end of the lifting plate 19 close to the second inner cavity 12 is connected to the bottom of the second inner cavity 12 on the door frame 1 through a spring 22. The spring 22 can be used to automatically reset the lifting plate 19 after rotation. The lower locking block 20 at the end of the lifting plate 19 is engaged with the lower groove 17 below the damper plate 3. The area of ​​the third slot 24 on the surface of the bottom frame 2 is larger than the cross-sectional area of ​​the lower locking block 20, and the lower locking block 20 at the end of the lifting plate 19 can be inserted into the lower groove 17 at the lower end of the damper plate 3 to lock the lower end of the damper plate 3.

[0025] Working principle: First, the device is installed at the air inlet and return shaft inside the coal mine. When locked, the servo motor 8 can be turned on to drive the rotating screw 9 to rotate, so that the rotating screw 9 and the movable plate 10 can move in a threaded manner. At the same time, under the limiting action of the first slot 13 inside the door frame 1, it moves downward so that the upper locking block 11 below the movable plate 10 is inserted into the upper slot 15 on the upper surface of the air door plate 3, so that the air door plate 3 is locked. When the movable plate 10 moves downward, it will drive the two ends to move. The extrusion plate 14 moves downward so that the extrusion plate 14 squeezes the lifting plate 19, so that the lifting plate 19 rotates under the action of the rotating shaft 21 inside the bottom frame 2. When the lifting plate 19 rotates, the lower locking block 20 at the end of the lifting plate 19 protrudes out of the third slot 24 on the surface of the bottom frame 2 so as to enter the lower card slot 17 below the damper plate 3, thereby facilitating the locking of the lower end of the damper plate 3. The end of the lifting plate 19 is connected to the bottom of the second inner cavity 12 inside the door frame 1 through the spring 22, so as to reset the lifting plate 19.

[0026] When the damper plate 3 is opened, the electric telescopic rod 5 can be opened to make the connecting block 6 below the electric telescopic rod 5 snap into the positioning groove 16 at the inner end of the upper surface of the damper plate 3, so as to position the damper plate 3 when opened and improve the stability of the damper plate 3 when opened. This is the working principle of the locking device.

[0027] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A locking device, comprising a door frame (1), a damper plate (3), an electric telescopic rod (5) and a servo motor (8), characterized in that: A bottom frame (2) is fixed to the bottom of the door frame (1), and both ends of the door frame (1) are rotatably connected to damper plates (3), the inner ends of the damper plates (3) are bonded with rubber pads (4), electric telescopic rods (5) are fixed to the left and right ends of the upper surface of the door frame (1), and a connecting block (6) is fixed to the bottom of the electric telescopic rod (5), a first inner cavity (7) is opened above the door frame (1), and a servo motor (8) is fixed to the top of the first inner cavity (7) of the door frame (1), a rotating screw rod (9) is fixed to the output end of the servo motor (8), a movable plate (10) is arranged below the rotating screw rod (9), and an extrusion plate (14) is fixed below the end of the movable plate (10), and upper locking blocks (11) are fixed to both ends of the lower side of the movable plate (10), and a second inner cavity (12) is opened at both left and right ends of the door frame (1). ), a first slot (13) is provided inside the door frame (1) between the second inner cavity (12) and the first inner cavity (7), upper slots (15) are evenly provided on the upper surface of the damper plate (3), and a positioning slot (16) is provided at the upper end of the damper plate (3), a lower slot (17) is provided below the damper plate (3), a third inner cavity (18) is provided inside the bottom frame (2), and third slots (24) are provided at left and right ends of the upper surface of the bottom frame (2), a second slot (23) communicating with the second inner cavity (12) and the third inner cavity (18) is provided at the bottom of the door frame (1), lifting plates (19) are provided at both ends of the inside of the bottom frame (2), and the ends of the lifting plates (19) are rotatably connected to the bottom frame (2) via a rotating shaft (21), and a lower locking block (20) is fixed to the upper surface of the inner end of the lifting plate (19).

2. A locking device according to claim 1, characterized in that: The connecting block (6) below the electric telescopic rod (5) and the positioning groove (16) at the upper inner end of the damper plate (3) form a snap-fit ​​connection.

3. A locking device according to claim 1, characterized in that: The rotating screw rod (9) and the movable plate (10) are connected by threaded connection, and both ends of the movable plate (10) pass through the first slot (13) and are located inside the second inner cavity (12). The width of the movable plate (10) is equal to the width of the first slot (13).

4. A locking device according to claim 1, characterized in that: The upper locking blocks (11) below the movable plate (10) are arranged to engage with the upper slots (15) provided on the upper surface of the damper plate (3) in a one-to-one corresponding manner, and three groups of upper locking blocks (11) are provided at the left and right ends of the movable plate (10).

5. A locking device according to claim 1, characterized in that: The movable plate (10) and the extrusion plate (14) are arranged vertically, and the lower end surface of the extrusion plate (14) is arranged to fit the upper end surface of the end of the lifting plate (19).

6. A locking device according to claim 1, characterized in that: The lifting plate (19) is arranged in a folded line shape, and the end of the lifting plate (19) close to the second inner cavity (12) is connected to the bottom of the second inner cavity (12) on the door frame (1) via a spring (22).

7. A locking device according to claim 1, characterized in that: The lower locking block (20) at the end of the lifting plate (19) is engaged with the lower slot (17) below the damper plate (3), and the area of ​​the third slot (24) on the surface of the bottom frame (2) is larger than the cross-sectional area of ​​the lower locking block (20).

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