Support structure for a civil defense door

Abstract

This utility model discloses a support structure for a civil defense door, comprising: a door frame, a door panel rotatably connected to the inner wall of the side of the door frame, a door handle rotatably connected to the inner wall of the door panel, and a worm gear fixedly connected to the outer wall of the door handle; this utility model relates to the field of civil defense door support technology. The door panel, when operated by a worker rotating the door handle, utilizes the meshing transmission of the worm gear and worm wheel, as well as the threaded transmission of the bidirectional threaded rod and threaded sleeve, while the pressing plate and the fixing groove slide against each other, to easily control the opening and closing of the door panel. Simultaneously, when the door panel is opened to a suitable angle, rotating the door handle in the opposite direction causes the lower anti-slip pad to contact the ground, effectively supporting and fixing the opening angle and preventing the door panel from wobbling. Through the cooperation of a pressure spring and a wedge, during the rotation of the door panel, the bottom pulley pops out and contacts the ground, greatly reducing the friction between the door panel and the door frame, making the door panel open more smoothly.

Description

Technical Field

[0001] This utility model relates to the field of air defense door support technology, specifically a support structure for air defense doors. Background Technology

[0002] As an important protective facility for safeguarding people's lives and property, the performance of the supporting structure of civil defense doors directly affects the door's usability and safety. In the past, there were some shortcomings in the design of the supporting structure of civil defense doors.

[0003] Traditional air-raid shelter doors often require complex steps to open and close, as the opening and closing and supporting / fixing devices are separate. Workers may need to perform multiple actions simultaneously, such as first turning the door handle to open the door and then lowering the supporting / fixing components. This is not only complicated and inefficient, but in emergencies, when the door needs to be opened and closed quickly, this complicated operation may delay the best time for personnel evacuation. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this utility model provides a support structure for air defense doors, which solves the problem of complex opening, closing, and supporting and fixing door panels.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A support structure for a civil defense door includes: a door frame; a door panel rotatably connected to the inner wall of the side of the door frame; a door handle rotatably connected to the inner wall of the door panel; a worm gear fixedly connected to the outer wall of the door handle; a rotating groove formed on the inner wall of the door panel; a bidirectional threaded rod rotatably connected to the inner wall of the rotating groove; threaded sleeves symmetrically threaded to the outer wall of the bidirectional threaded rod; a worm wheel fixedly connected to the outer wall of the bidirectional threaded rod; a support column fixedly connected to the outer wall of the threaded sleeve on the side away from the bidirectional threaded rod; an extrusion plate fixedly connected to the outer wall of the support column on the side away from the threaded sleeve; and an anti-slip pad fixedly connected to the outer wall of the extrusion plate.

[0009] Preferably, the outer walls of the threaded sleeve, support column, and extrusion plate are slidably connected to the inner wall of the door panel. The outer wall of the worm wheel meshes with the outer wall of the worm. When the door handle rotates, the worm rotates together, and the rotation of the worm drives the worm wheel to rotate. Because the worm wheel is fixedly connected to the outer wall of the bidirectional threaded rod, the bidirectional threaded rod rotates in the groove. Since the outer wall of the threaded sleeve slides up and down with the inner wall of the door panel, according to the principle of thread transmission, when the bidirectional threaded rod rotates, the two threaded sleeves will move relative to each other along the bidirectional threaded rod.

[0010] Preferably, the inner wall of the door frame is symmetrically provided with fixing grooves, and the inner wall of the fixing groove is slidably connected to the outer wall of the extrusion plate. The inner wall of the fixing groove is in contact with the outer wall of the anti-slip pad. When the door handle is turned, the extrusion plate is inserted into the fixing groove, thereby fixing the door panel.

[0011] Preferably, the inner wall of the bottom of the door panel is provided with a sliding groove, the inner wall of the sliding groove is symmetrically and fixedly connected with a sliding rod, the outer wall of the sliding rod is slidably connected with a support plate, the outer wall of the bottom of the support plate is fixedly connected with a pulley, the outer wall of the side of the pulley is fixedly connected with an inclined block, and the outer wall of the top of the support plate is symmetrically and fixedly connected with a pressure spring.

[0012] Preferably, the outer wall of the pressure spring on the side away from the support plate is fixedly connected to the inner wall of the slide groove. The elastic force of the pressure spring will push the support plate downward along the slide rod. The outer walls of the support plate and the inclined block are slidably connected to the inner wall of the slide groove.

[0013] Preferably, the outer wall of the bottom of the door frame contacts the outer wall of the inclined block, and the inner wall of the bottom of the door frame is slidably connected to the outer wall of the bottom of the pulley. When the door panel is about to close, the outer wall of the bottom of the door frame contacts the outer wall of the inclined block. As the door panel continues to close, it will push the inclined block to move upward. The inclined block drives the support plate to slide upward on the slide rod, while compressing the pressure spring, so that the pulley is retracted into the slide groove.

[0014] (III) Beneficial Effects

[0015] This utility model provides a support structure for air defense doors. It has the following beneficial effects:

[0016] (I) The door panel can be easily opened and closed by the operator turning the door handle. The operation process is carried out by the meshing transmission of the worm gear and worm wheel, as well as the thread transmission of the two-way threaded rod and threaded sleeve. At the same time, the pressing plate and the fixing groove slide against each other. When the door panel is opened to a suitable angle, the door handle is turned in the opposite direction, and the anti-slip pad below contacts the ground, effectively supporting and fixing the opening angle, preventing the door panel from shaking, and ensuring the safety of personnel when passing through the air-raid shelter door. This design can realize both opening and closing the door and fixing the door panel by simply using the door handle.

[0017] (II) Through the cooperation of the pressure spring and the inclined block, the bottom pulley pops out and contacts the ground during the rotation of the door panel, which greatly reduces the friction between the door panel and the door frame. When the air defense door is closed, the bottom of the door frame interacts with the inclined block, causing the pulley to retract along the track, which reduces the wear of the door panel and the door frame, extends the service life of the overall structure of the air defense door, and the reduced friction makes the door panel open more smoothly. Attached Figure Description

[0018] Figure 1This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the slide groove of this utility model;

[0020] Figure 3 This utility model Figure 2 A schematic diagram of the structure at point B;

[0021] Figure 4 This is a schematic diagram of the structure of the bidirectional threaded rod of this utility model;

[0022] Figure 5 This utility model Figure 4 A schematic diagram of the structure at point A;

[0023] Figure 6 This is a schematic diagram of the inclined block of this utility model;

[0024] Figure 7 This is a schematic diagram of the rotating groove of this utility model.

[0025] In the diagram: 1. Door frame; 11. Fixing groove; 2. Door panel; 3. Door handle; 31. Worm gear; 21. Rotary groove; 22. Double-threaded rod; 221. Worm wheel; 23. Threaded sleeve; 24. Support column; 25. Extrusion plate; 26. Anti-slip pad; 27. Slide groove; 28. Slide rod; 29. ​​Support plate; 291. Pulley; 292. Wedge block; 293. Pressure spring. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Please see Figure 1-7 This utility model provides a technical solution: a support structure for a civil defense door, comprising: a door frame 1, a door panel 2 rotatably connected to the inner wall of the side of the door frame 1, a door handle 3 rotatably connected to the inner wall of the door panel 2, and a worm gear 31 fixedly connected to the outer wall of the door handle 3; a rotating groove 21 is provided on the inner wall of the door panel 2, a bidirectional threaded rod 22 is rotatably connected to the inner wall of the rotating groove 21, a threaded sleeve 23 is symmetrically threaded to the outer wall of the bidirectional threaded rod 22, a worm wheel 221 is fixedly connected to the outer wall of the threaded sleeve 23 on the side away from the bidirectional threaded rod 22, a support column 24 is fixedly connected to the outer wall of the support column 24 on the side away from the threaded sleeve 23, and an extrusion plate 25 is fixedly connected to the outer wall of the extrusion plate 25, and an anti-slip pad 26 is fixedly connected to the outer wall of the extrusion plate 25.

[0028] The outer walls of the threaded sleeve 23, support column 24, and extrusion plate 25 are slidably connected to the inner wall of the door panel 2. The outer wall of the worm wheel 221 meshes with the outer wall of the worm 31. When the door handle 3 rotates, it will drive the worm 31 to rotate together. The rotation of the worm 31 will drive the worm wheel 221 to rotate. Because the worm wheel 221 is fixedly connected to the outer wall of the bidirectional threaded rod 22, the bidirectional threaded rod 22 rotates in the rotating groove 21. Since the outer wall of the threaded sleeve 23 slides up and down with the inner wall of the door panel 2, according to the principle of thread transmission, when the bidirectional threaded rod 22 rotates, the two threaded sleeves 23 will move relative to each other along the bidirectional threaded rod 22.

[0029] The inner wall of the door frame 1 is symmetrically provided with fixing grooves 11, and the inner wall of the fixing groove 11 is slidably connected to the outer wall of the extrusion plate 25. The inner wall of the fixing groove 11 is in contact with the outer wall of the anti-slip pad 26. When the door handle 3 is turned, the extrusion plate 25 is inserted into the fixing groove 11, thereby fixing the door panel 2.

[0030] The inner wall at the bottom of the door panel 2 is provided with a sliding groove 27. A sliding rod 28 is symmetrically fixedly connected to the inner wall of the sliding groove 27. A support plate 29 is slidably connected to the outer wall of the sliding rod 28. A pulley 291 is fixedly connected to the outer wall at the bottom of the support plate 29. An inclined block 292 is fixedly connected to the outer wall on the side of the pulley 291. A pressure spring 293 is symmetrically fixedly connected to the outer wall at the top of the support plate 29.

[0031] The outer wall of the pressure spring 293 on the side away from the support plate 29 is fixedly connected to the inner wall of the slide groove 27. The elastic force of the pressure spring 293 will push the support plate 29 downward along the slide rod 28. The outer walls of the support plate 29 and the inclined block 292 are slidably connected to the inner wall of the slide groove 27.

[0032] The outer wall of the bottom of the door frame 1 contacts the outer wall of the inclined block 292, and the inner wall of the bottom of the door frame 1 is slidably connected to the outer wall of the bottom of the pulley 291. When the door panel 2 is about to close, the outer wall of the bottom of the door frame 1 contacts the outer wall of the inclined block 292. As the door panel 2 continues to close, it will push the inclined block 292 to move upward. The inclined block 292 drives the support plate 29 to slide upward on the slide rod 28, while compressing the pressure spring 293, so that the pulley 291 is retracted into the slide groove 27.

[0033] When in use, the staff turns the door handle 3 to open the door. At the same time, the bottom pulley 291 pops out and contacts the ground, reducing the friction between the door panel 2 and the door frame 1 when the door panel 2 is turned, making the door panel 2 easier and less strenuous to open. When it is opened to the appropriate angle, the door handle 3 is turned in the opposite direction, and the anti-slip pad 26 contacts the ground to support and fix the opening angle.

[0034] When the door needs to be opened, first turn the door handle 3. Since the outer wall of the door handle 3 is fixedly connected to the worm gear 31, turning the door handle 3 will drive the worm gear 31 to rotate together. Since the outer wall of the worm wheel 221 meshes with the outer wall of the worm gear 31, the rotation of the worm gear 31 will drive the worm wheel 221 to rotate. Since the worm wheel 221 is fixedly connected to the outer wall of the double-threaded rod 22, the double-threaded rod 22 will rotate in the rotating groove 21. Since the outer wall of the threaded sleeve 23 slides up and down with the inner wall of the door panel 2, according to the principle of thread transmission, when the double-threaded rod 22 rotates, the two threaded sleeves 23 will move closer to each other along the double-threaded rod 22. The movement of the threaded sleeves 23 will drive the support column 24 fixedly connected to it to move. The support column 24 will then drive the pressing plate 25 to move, so that it slides out of the fixed groove 11.

[0035] Next, rotate the door panel 2 along the door frame 1. When the door is closed, the pulley 291 on the support plate 29 is in the slide groove 27, and the pressure spring 293 is in a compressed and stored state. As the door panel 2 rotates and opens, the pressure spring 293 is released and pushes the support plate 29 to move downward along the slide rod 28, causing the pulley 291 to contact the ground and slide as the door panel 2 rotates. This reduces the friction between the door panel 2 and the door frame 1 when the door panel 2 rotates, making it easier and less strenuous to open the door panel 2.

[0036] When the door panel 2 is opened to the appropriate angle, the door handle 3 is turned in the opposite direction, and the worm gear 31 is turned in the opposite direction, which in turn drives the worm wheel 221 to turn in the opposite direction, causing the bidirectional threaded rod 22 to also turn in the opposite direction. The reverse rotation will cause the two threaded sleeves 23 to move away from each other, thereby driving the support column 24 and the pressing plate 25 to move outward from the door panel 2, so that the anti-slip pad 26 below contacts the ground, thereby achieving the support and fixation of the opening angle and preventing the door panel 2 from shaking when it is opened.

[0037] Conversely, when closing is required, turn the door handle 3 again to retract the compression plate 25, and then turn the door panel 2 towards the position of the door frame 1. When it is about to close, the outer wall of the bottom of the door frame 1 contacts the outer wall of the inclined block 292. As the door panel 2 continues to close, it will push the inclined block 292 to move upward. The inclined block 292 drives the support plate 29 to slide upward on the slide rod 28, while compressing the pressure spring 293, so that the pulley 291 is retracted into the slide groove 27. When the door panel 2 is completely closed, turn the door handle 3 in the opposite direction again to make the compression plate 25 lock into the fixing groove 11, thereby fixing the door panel 2 and enhancing the stability and safety of the blast door after it is closed.

[0038] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0039] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A support structure for a blast door, comprising: A door frame (1), a door panel (2) is rotatably connected to the inner wall of the side of the door frame (1), and a door handle (3) is rotatably connected to the inner wall of the door panel (2), characterized in that a worm gear (31) is fixedly connected to the outer wall of the door handle (3); The inner wall of the door panel (2) is provided with a rotating groove (21). The inner wall of the rotating groove (21) is rotatably connected to a bidirectional threaded rod (22). The outer wall of the bidirectional threaded rod (22) is symmetrically threaded with a threaded sleeve (23). The outer wall of the bidirectional threaded rod (22) is fixedly connected with a worm gear (221). The outer wall of the threaded sleeve (23) away from the bidirectional threaded rod (22) is fixedly connected with a support column (24). The outer wall of the support column (24) away from the threaded sleeve (23) is fixedly connected with an extrusion plate (25). The outer wall of the extrusion plate (25) is fixedly connected with an anti-slip pad (26).

2. The support structure for a civil defense door according to claim 1, characterized in that: The outer walls of the threaded sleeve (23), support column (24) and extrusion plate (25) are slidably connected to the inner wall of the door panel (2), and the outer wall of the worm wheel (221) meshes with the outer wall of the worm (31).

3. The support structure for a civil defense door according to claim 1, characterized in that: The inner wall of the door frame (1) is symmetrically provided with fixing grooves (11), and the inner wall of the fixing groove (11) is slidably connected to the outer wall of the extrusion plate (25), and the inner wall of the fixing groove (11) is in contact with the outer wall of the anti-slip pad (26).

4. The support structure for a civil defense door according to claim 1, characterized in that: The inner wall of the bottom of the door panel (2) is provided with a sliding groove (27). A sliding rod (28) is symmetrically fixedly connected to the inner wall of the sliding groove (27). A support plate (29) is slidably connected to the outer wall of the sliding rod (28). A pulley (291) is fixedly connected to the outer wall of the bottom of the support plate (29). An inclined block (292) is fixedly connected to the outer wall of the side of the pulley (291). A pressure spring (293) is symmetrically fixedly connected to the outer wall of the top of the support plate (29).

5. A support structure for a civil defense door according to claim 4, characterized in that: The outer wall of the pressure spring (293) on the side away from the support plate (29) is fixedly connected to the inner wall of the slide groove (27), and the outer walls of the support plate (29) and the inclined block (292) are slidably connected to the inner wall of the slide groove (27).

6. A support structure for a civil defense door according to claim 1, characterized in that: The outer wall of the bottom of the door frame (1) is in contact with the outer wall of the inclined block (292), and the inner wall of the bottom of the door frame (1) is slidably connected to the outer wall of the bottom of the pulley (291).

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