Lifting device of civil defense door

Abstract

The utility model relates to the field of civil air defense doors, and discloses a civil air defense door lifting device which comprises a foundation, a containing cavity is formed in the foundation, a civil air defense door threshold is arranged in the containing cavity, a plurality of lifting assemblies are arranged at the lower end of the civil air defense door threshold, and each lifting assembly comprises a base plate arranged at the bottom of the containing cavity. A transmission assembly is arranged on the base plate and comprises a plurality of threaded rods arranged on the base plate, a manual driving assembly is arranged at the tail end of one threaded rod, and a motor driving assembly is arranged at the end, away from the manual driving assembly, of one threaded rod. The manual driving assembly comprises a first electromagnetic clutch arranged at one end of the threaded rod. Through the characteristics of the electromagnetic clutch, the effects of free switching between manual operation and motor driving and wide application range are achieved, the guide shaft is driven to move through the double screws, and the effects of high positioning precision, high speed, higher bearing capacity, high rigidity and durability are achieved.

Description

Technical Field

[0001] The present application relates to the technical field of civil air defense doors, and in particular to a lifting device for a civil air defense door. Background Technique

[0002] The types of civil air defense doors include ordinary single and double leaf protective airtight doors, airtight doors, and drop-type double leaf protective airtight doors. The drop-type double leaf protective airtight door is characterized in that there is no threshold on the ground usually, which is convenient for people or vehicles to pass through. It is commonly used in civil air defense projects combined with peacetime and wartime, the drop-type double leaf protective airtight door.

[0003] "A lifting threshold civil air defense door" is disclosed in "CN 209510091 U", which includes a door frame, two inward-opening door leaves inside the door frame, a liftable threshold located below the door leaves, and a receiving cavity located below the threshold for receiving the threshold... A magnet bar is provided in the through hole. It drives the rotation of spur gear A and spur gear B by a motor, drives the rotation of the transmission shaft and the vertical bevel gear, thereby drives the rotation of the horizontal bevel gear, makes the screw move up and down, and further realizes the lifting of the threshold.

[0004] Regarding the above related technology, the inventor believes that although the motor can drive the screw to move up and down to quickly realize the lifting of the threshold, in case of an emergency, such as a power outage due to unstable power supply, the motor cannot start, resulting in the inability to lift the threshold, which has the defect of narrow application range.

[0005] The above information disclosed in this background technique is only used to increase the understanding of the background technique of the present application. Therefore, it may include prior art that is not known to ordinary technicians in this field. Utility Model Content

[0006] In order to solve the problem that when the power supply is unstable and the line is powered off, the motor cannot start, resulting in the inability to lift the threshold and having a narrow application range, the present application provides a lifting device for a civil air defense door that can realize the lifting of the civil air defense door threshold by two driving methods: manual and motor.

[0007] The lifting device for a civil air defense door provided by the present application adopts the following technical solution:

[0008] A lifting device for a civil air defense door includes a foundation. A receiving cavity is provided on the foundation. A civil air defense door threshold is provided in the receiving cavity. A plurality of lifting components are provided at the lower end of the civil air defense door threshold. The lifting component includes a base plate provided at the bottom of the receiving cavity. A transmission component is provided on the base plate. The transmission component includes a plurality of threaded rods provided on the base plate. A manual driving component is provided at the end of one of the threaded rods. A motor driving component is provided at one end of one of the threaded rods far away from the manual driving component.

[0009] Preferably, two guide rails are provided on the side of each of the plurality of substrates close to the threshold of the civil air defense door. A guide shaft is provided inside the two front and rear corresponding guide rails. The two ends of the two vertically corresponding guide shafts are provided with the same scissor support frame, and the substrates and the threshold of the civil air defense door are respectively hinged to the corresponding scissor support frames.

[0010] Preferably, a plurality of moving blocks are sleeved on the two threaded rods, and the moving blocks are respectively fixedly connected to the corresponding guide shafts. One ends of the two threaded rods are fixedly sleeved with gears, and the two gears are meshed with each other.

[0011] Preferably, the manual driving assembly includes an electromagnetic clutch I provided at one end of the threaded rod. A connecting shaft is provided on the electromagnetic clutch I. A worm gear is fixedly sleeved on the connecting shaft. A worm is provided outside the worm gear on the substrate, and the worm is meshed with the worm gear.

[0012] Preferably, the upper end of the worm passes through the foundation and is rotatably connected to the foundation. A hand wheel is provided at the upper end of the worm.

[0013] Preferably, the motor driving assembly includes an electromagnetic clutch II provided at one end of the threaded rod. The input end of the electromagnetic clutch II is connected to a driving motor, and the driving motor is provided on the substrate.

[0014] In summary, the present application includes the following beneficial technical effects:

[0015] 1. Through the combined use of the transmission assembly, the manual driving assembly, and the motor driving assembly, and by utilizing the characteristics of the electromagnetic clutch, when the circuit is powered on, the electromagnetic clutch I disengages, and the electromagnetic clutch II engages, so that the threaded rod is separated from the connecting shaft. The driving motor drives the electromagnetic clutch II and the threaded rod to rotate, thereby driving the moving block to move, causing the scissor support frame to unfold and jack up the threshold of the civil air defense door. When the circuit is powered off, the electromagnetic clutch II disengages, and the electromagnetic clutch I engages, so that the threaded rod is combined with the connecting shaft, and the threaded rod is separated from the driving motor. By rotating the hand wheel to drive the worm to drive the worm gear and the connecting shaft to rotate, the electromagnetic clutch I and the threaded rod are driven to rotate, thereby driving the moving block to move, causing the scissor support frame to unfold and jack up the threshold of the civil air defense door; compared with the prior art, it can realize the free switching between manual and motor driving, and has the effect of wide application range;

[0016] 2. Through the combined use of the lifting assembly and the transmission assembly, it drives the guide shaft to move through the double screw rod to realize the unfolding and storage of the scissor support frame. Since the structure of the double screw rod can reduce the transmission error, the positioning accuracy is improved. The double screw rod drive can work at a higher speed, and the double screw rod technology can increase the load-bearing capacity; compared with the prior art, it has the effects of high positioning accuracy, high speed, greater load-bearing capacity, high rigidity, and durability. Brief Description of the Drawings

[0017] Figure 1 is a first - perspective three - dimensional structure schematic diagram of an application embodiment;

[0018] Figure 2 is a second - perspective three - dimensional structure schematic diagram of an application embodiment;

[0019] Figure 3 is a third - perspective three - dimensional structure schematic diagram of an application embodiment.

[0020] Description of Reference Numerals: 1, foundation; 2, threshold of civil air defense door; 3, lifting assembly; 301, base plate; 302, guide rail; 303, guide shaft; 304, scissor support frame; 4, transmission assembly; 401, threaded rod; 402, moving block; 403, gear; 5, manual drive assembly; 501, electromagnetic clutch I; 502, connecting shaft; 503, worm gear; 504, worm; 6, motor drive assembly; 601, electromagnetic clutch II; 602, drive motor; 7, handwheel. Detailed Description of the Invention

[0021] The following further describes the present application in detail with reference to the Figures 1 - 3 drawings.

[0022] The embodiment of the present application discloses a lifting device for a civil air defense door. Referring to Figures 1 - 3 , a lifting device for a civil air defense door includes a foundation 1. A receiving cavity is formed in the foundation 1. A civil air defense door threshold 2 is installed in the receiving cavity. A plurality of lifting assemblies 3 are installed at the lower end of the civil air defense door threshold 2. The lifting assembly 3 includes a base plate 301 installed at the bottom of the receiving cavity. A transmission assembly 4 is installed on the base plate 301. The transmission assembly 4 includes a plurality of threaded rods 401 installed on the base plate 301. One end of a threaded rod 401 is installed with a manual drive assembly 5. The manual drive assembly 5 includes an electromagnetic clutch I 501 installed at one end of the threaded rod 401. The electromagnetic clutch I 501 is a power - off engagement type electromagnetic clutch. A connecting shaft 502 is installed on the electromagnetic clutch I 501. A worm gear 503 is fixedly sleeved on the connecting shaft 502. A worm 504 is installed outside the worm gear 503 on the base plate 301. The worm 504 meshes with the worm gear 503. One end of a threaded rod 401 away from the manual drive assembly 5 is installed with a motor drive assembly 6. The motor drive assembly 6 includes an electromagnetic clutch II 601 installed at one end of the threaded rod 401. The electromagnetic clutch II 601 is a power - on engagement type electromagnetic clutch. The input end of the electromagnetic clutch II 601 is connected with a drive motor 602. The drive motor 602 is installed on the base plate 301. The upper end of the worm 504 passes through the foundation 1 and is connected to the foundation 1 through a bearing. A handwheel 7 is installed at the upper end of the worm 504;

[0023] By adopting the above technical solution, utilizing the characteristics of the electromagnetic clutch, when the circuit is powered on, the first electromagnetic clutch 501 disengages, and the second electromagnetic clutch 601 engages, causing the threaded rod 401 to separate from the connecting shaft 502. The second electromagnetic clutch 601 and the threaded rod 401 are driven by the drive motor 602 to rotate, thereby driving the moving block 402 to move, causing the scissor support frame 304 to unfold and lift the threshold 2 of the civil air defense door. When the circuit is powered off, the second electromagnetic clutch 601 disengages, and the first electromagnetic clutch 501 engages, causing the threaded rod 401 to be combined with the connecting shaft 502, and the threaded rod 401 to be separated from the drive motor 602. By rotating the handwheel 7 to drive the worm 504 to drive the worm gear 503 and the connecting shaft 502 to rotate, thereby driving the first electromagnetic clutch 501 and the threaded rod 401 to rotate, and then driving the moving block 402 to move, causing the scissor support frame 304 to unfold and lift the threshold 2 of the civil air defense door. It can achieve the free switching between manual and motor drive, and has the effect of wide application range.

[0024] Refer to Figures 2 - 3 , on the side of several substrates 301 close to the threshold 2 of the civil air defense door, two guide rails 302 are installed. On the inner sides of the two front and rear corresponding guide rails 302, a guide shaft 303 is installed. At both ends of the two vertically corresponding guide shafts 303, the same scissor support frame 304 is installed. The substrates 301 and the threshold 2 of the civil air defense door are respectively hinged to the corresponding scissor support frames 304;

[0025] By adopting the above technical solution, the threaded rod 401 rotates to drive the moving block 402 to move, thereby driving the guide shaft 303 to move along the guide rail 302, and then driving the lower end of the scissor support frame 304 to rotate, causing the scissor support frame 304 to unfold or fold, thereby realizing the lifting of the threshold 2 of the civil air defense door.

[0026] Refer to Figures 2 - 3 , several moving blocks 402 are sleeved on the two threaded rods 401. The moving blocks 402 are respectively fixedly connected to the corresponding guide shafts 303. At one end of the two threaded rods 401, gear 403 is fixedly sleeved, and the two gears 403 are meshed with each other;

[0027] By adopting the above technical solution, it drives the two identical threaded rods 401 to rotate synchronously through the gear 403, realizes the double-screw drive to move the guide shaft 303, and realizes the unfolding and storage of the scissor support frame 304. Since the structure of the double screw can reduce the transmission error, thereby improving the positioning accuracy, the double-screw drive can work at a higher speed, and the double-screw technology can increase the load-bearing capacity.

[0028] The implementation principle of a lifting device for a civil air defense door in an embodiment of the present application is as follows: When the circuit is powered on, electromagnetic clutch 1 501 disengages, and electromagnetic clutch 2 601 engages, causing the threaded rod 401 to separate from the connecting shaft 502. By driving electromagnetic clutch 2 601 to rotate with a driving motor 602, the threaded rod 401 and the gear 403 rotate, thereby driving the moving block 402 to move, causing the guide shaft 303 to move along the guide rail 302, and then realizing the unfolding and folding of the scissor support frame 304, so as to realize the lifting and storage of the threshold 2 of the civil air defense door. When the circuit is powered off, electromagnetic clutch 2 601 disengages, and electromagnetic clutch 1 501 engages, causing the threaded rod 401 to be combined with the connecting shaft 502, and the threaded rod 401 to be separated from the driving motor 602. By rotating the handwheel 7 to drive the worm 504 to drive the worm gear 503 and the connecting shaft 502 to rotate, and then driving electromagnetic clutch 1 501 to rotate, the threaded rod 401 and the gear 403 rotate, thereby driving the moving block 402 to move, causing the scissor support frame 304 to unfold and fold, so as to realize the lifting and storage of the threshold 2 of the civil air defense door. This device can achieve the free switching between manual and motor drive, with a wide range of applications. At the same time, the double-screw drives the guide shaft 303 to move, realizing the unfolding and storage of the scissor support frame 304. Since the structure of the double-screw can reduce the transmission error, the positioning accuracy can be improved. The double-screw drive can work at a higher speed, and the double-screw technology can increase the load-bearing capacity, making the device have high positioning accuracy, high speed, greater load-bearing capacity, high rigidity and durability.

[0029] Finally, several points should be noted: First, in the description of the present application, it should be noted that unless otherwise specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense, which can be mechanical connection or electrical connection, or the communication inside two components, and can be directly connected. "Up", "down", "left", "right", etc. are only used to represent the relative position relationship. When the absolute position of the object being described changes, the relative position relationship may change;

[0030] Second: In the attached drawings of the disclosed embodiments of the present utility model, only the structures related to the disclosed embodiments of the present disclosure are involved. For other structures, reference can be made to the usual designs. Without conflict, the same embodiment and different embodiments of the present utility model can be combined with each other;

[0031] Finally: The above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

[0032] The above are all the preferred embodiments of the present application and do not limit the protection scope of the present application accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application shall be covered within the protection scope of the present application.

Claims

1. A lifting device for a civil air defense door, comprising a foundation (1), characterized in that: A accommodating cavity is provided on the foundation (1), a human air defense door threshold (2) is provided in the accommodating cavity, a plurality of lifting assemblies (3) are provided at the lower end of the human air defense door threshold (2), the lifting assemblies (3) include a base plate (301) provided at the bottom of the accommodating cavity, a transmission assembly (4) is provided on the base plate (301), the transmission assembly (4) includes a plurality of threaded rods (401) provided on the base plate (301), a manual drive assembly (5) is provided at the end of one of the threaded rods (401), and a motor drive assembly (6) is provided at one end of the threaded rod (401) away from the manual drive assembly (5).

2. The lifting device for a civil air defense door according to claim 1, characterized in that: Two guide rails (302) are arranged on the sides of the base plates (301) and the threshold of the civil air defense door (2) close to each other, guide shafts (303) are arranged on the inner sides of the two corresponding guide rails (302) at the front and rear, and the same scissor-type support frame (304) is arranged at both ends of the two corresponding guide shafts (303) at the upper and lower ends, and the base plates (301) and the threshold of the civil air defense door (2) are respectively hinged to the corresponding scissor-type support frames (304).

3. The lifting device for a civil air defense door according to claim 2, characterized in that: A plurality of moving blocks (402) are threadedly sleeved on the two threaded rods (401), and the moving blocks (402) are fixedly connected to corresponding guide shafts (303) respectively. A gear (403) is fixedly sleeved on one end of the two threaded rods (401), and the two gears (403) are meshed with each other.

4. The lifting device for a civil air defense door according to claim 3, characterized in that: The manual drive assembly (5) includes an electromagnetic clutch (501) arranged at one end of a threaded rod (401), a connecting shaft (502) being arranged on the electromagnetic clutch (501), a worm gear (503) being fixedly sleeved on the connecting shaft (502), a worm (504) being arranged on the outer side of the worm gear (503) on the base plate (301), and the worm gear (504) being meshed with the worm gear (503).

5. The lifting device for a civil air defense door according to claim 4, characterized in that: The upper end of the worm (504) passes through the foundation (1) and is rotationally connected to the foundation (1), and a hand wheel (7) is provided at the upper end of the worm (504).

6. The lifting device for a civil air defense door according to claim 1, characterized in that: The motor drive assembly (6) comprises an electromagnetic clutch 2 (601) arranged at one end of the threaded rod (401), the input end of the electromagnetic clutch 2 (601) is connected to a drive motor (602), and the drive motor (602) is arranged on the base plate (301).

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