Worm gear airtight door
By introducing a worm gear structure and a latch design into the worm gear airtight door, the problem of jamming caused by the lock body scraping against the door frame is solved, achieving smooth operation and efficient transmission of the door leaf.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- JIANGSU JINFENG DOORS IND CO LTD
- Filing Date
- 2026-05-21
- Publication Date
- 2026-06-30
AI Technical Summary
Traditional airtight doors are prone to the lock body scratching the door frame during operation, leading to jamming and poor transmission.
A worm gear airtight door was designed, which adopts a worm gear and worm structure and a lock tongue structure. By setting a first gap between the lock and the door leaf and a second gap between the transmission lock tongue and the door frame, direct contact between the lock body and the door frame is avoided, thus achieving smooth transmission.
It reduces the chance of the lock body jamming, improves the convenience of operation and the smoothness of transmission, and ensures that the door can be closed and opened smoothly.
Smart Images
Figure CN122304591A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of door technology, specifically to worm gear airtight doors. Background Technology
[0002] Airtight doors are a type of protective door, mainly used to block gases, liquids, or shock waves, and are widely used in industrial and civil defense scenarios. Traditional airtight doors have two operating methods for opening or closing the door: electric operation and manual operation. Electric operation is more dependent on electricity, and a power outage or electronic component failure will affect the normal opening and closing of the airtight door. Manual operation, on the other hand, may cause the lock body to scrape against the door frame, resulting in lock body jamming and uneven transmission. Summary of the Invention
[0003] In view of the above-mentioned shortcomings in the related technologies, the purpose is to provide a worm gear airtight door to solve the technical problems of lock body scraping against the door frame, lock body jamming, and poor transmission in the related technologies; The technical solution to achieve the objective is: a worm gear airtight door, including: A door frame having a passageway; Several hinges are connected to the door frame. A door leaf, connected to the hinge, the door leaf rotating around the hinge as the center of rotation, opens or closes the passage; A lock body structure is provided on the door frame and the door leaf, and the lock body structure locks the door leaf when the door leaf closes the passage; And a sealing assembly, connected to the door leaf, which fits against the door frame when the door leaf closes the passage; The lock body structure includes: two latches symmetrically arranged on the door frame, with a first gap X between the latches and the door leaf; and a transmission latch connected to the door leaf, wherein when the transmission latch engages with the latches, a second gap Y is formed between the transmission latch and the door frame, and the door leaf closes the passage.
[0004] Furthermore: the door frame is a square frame structure; The channel is a square channel.
[0005] Furthermore: the latch has a square shape with a hollow space in the middle and an opening on one side edge, and the opening is connected to the hollow space.
[0006] Furthermore: the transmission lock tongue includes a worm gear structure, which is disposed on the door leaf; Two adjustable connectors are symmetrically connected to the worm gear structure; Two locking tongue structures are symmetrically arranged and pass through the door leaf. One end of the locking tongue structure is connected to the adjustable connector, and the other end is used with the latch at the opening and the hollow space. Two limiting members are symmetrically arranged to limit the worm gear structure, the adjustable connecting member, and the locking tongue structure; The device includes a hand crank, one end of which is connected to the worm gear structure for rotating the worm gear structure. The worm gear structure rotates synchronously with the adjustable connector, the latch structure, and the limiting member. The other end of the latch structure enters or disengages from the hollow space and the opening. After entering the hollow space, the latch structure engages with the latch.
[0007] Furthermore: the worm gear structure includes: a first splined shaft, disposed on the door leaf; Two first retaining rings are connected at intervals to the first splined shaft to limit the first splined shaft; The worm gear is connected to the first splined shaft; Two second retaining rings are connected at intervals to the first splined shaft to limit the worm gear; A worm gear is disposed on the door leaf and meshes with the worm wheel, and one end of the worm gear is connected to the hand crank.
[0008] Furthermore: the adjustable connector is a double-ended bolt, one end of which is threadedly connected to the worm gear structure, and the other end is threadedly connected to the locking tongue structure.
[0009] Furthermore: the locking tongue structure includes: a second splined shaft, connected to the adjustable connector; The extension piece is connected at one end to the second splined shaft; And a locking tongue, which is connected to the other end of the extension.
[0010] Furthermore: the latch includes a shaft segment connected to the extension member; The tongue body is connected to the shaft segment and disposed outside the extension member for use with the latch at the opening and the hollow space. The tongue body has a second gap Y between itself and the door frame.
[0011] Furthermore: the limiting member includes: an inner spline sleeve, which moves along the worm gear structure and the locking tongue structure and is fitted onto the worm gear structure and the locking tongue structure; And at least two set screws, spaced apart, the set screws being connected to the spline sleeve for tightening the adjustable connector.
[0012] Furthermore: the sealing assembly includes: a seal; A pressure strip is pressed onto the seal; And several clamping screws are connected to the door leaf to clamp the pressure strip and the seal.
[0013] The above technical solution has the following beneficial effects: the worm gear airtight door, compared with related technologies, is equipped with a door frame, hinges, door leaf, lock body structure and sealing components, and the lock body structure includes a latch and a transmission bolt; When it is necessary to close the passage on the door frame, the door leaf rotates around the hinge as the center of rotation, the door leaf blocks the passage, the drive lock tongue is operated, the drive lock tongue engages with the lock buckle, the sealing component fits against the door frame, and the door leaf closes the passage. The operation is relatively convenient and the transmission is relatively smooth. Because there is a first gap X between the latch and the door leaf, the door leaf will not scratch the latch; and there is a second gap Y between the transmission bolt and the door frame, the transmission bolt will not contact the door frame and will not scratch the door frame, thus reducing the chance of jamming and making the transmission relatively smooth. This overcomes the technical problems of lock body scraping against door frame, lock body easily jamming, and uneven transmission, achieving the technical effect of reducing the probability of jamming and relatively smooth transmission. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the final assembly. Figure 2 for Figure 1 A partial sectional view; Figure 3 for Figure 2 A schematic diagram of the structure after the central transmission lock tongue disengages from the lock latch; Figure 4 for Figure 2 A magnified view of part B in the diagram; Figure 5 This is a schematic diagram of the transmission lock tongue; Figure 6 This is an exploded view of the transmission lock tongue; Figure 7 for Figure 5 A schematic diagram of the structure with part of the latch removed; Figure 8 for Figure 7 A magnified view of part C in the diagram; Figure 9 This is a schematic diagram of the locking tongue structure; Figure 10 A partial schematic diagram showing the meshing of the worm gear and worm, and the connection between the worm and the door leaf and hand crank; Figure 11 for Figure 1 A magnified view of part A in the diagram; In the diagram: 10. Door frame, 11. Passageway, 20. Hinge, 30. Door leaf, 31. Square tube, 32. Sheet metal, 33. Round tube, 40. Lock body structure, 41. Locking latch, 41-1. Hollow space, 41-2. Opening, 42. Transmission bolt, 42-1. Worm gear structure, 42-11. First splined shaft, 42-12. First snap ring, 42-13. Worm gear, 42-14. Second snap ring, 42-15. Worm gear, 42-2. Adjustable connector, 42-3. Locking tongue structure, 42-31. Second spline shaft, 42-32. Extension piece, 42-33. Locking tongue, 42-33-1. Shaft section, 42-33-2. Tongue body, 42-4. Limiting piece, 42-41. Inner spline sleeve, 42-42. Set screw, 42-5. Hand crank, 50. Sealing assembly, 51. Seal, 52. Pressure strip, 53. Tightening screw. Detailed Implementation
[0015] To make the content easier to understand, the following detailed description is provided with reference to specific embodiments and accompanying drawings; The worm gear airtight door solves the technical problems of lock body scraping against the door frame, lock body jamming, and uneven transmission in related technologies. It achieves the positive effects of reducing the probability of jamming and relatively smooth transmission. The overall concept is as follows: Implementation Method
[0016] like Figure 1 , Figure 2 , Figure 3 As shown; the worm gear airtight door includes: Door frame 10, wherein the door frame 10 has a channel 11; Several hinges 20 are connected to the door frame 10. Door leaf 30 is connected to hinge 20, and door leaf 30 rotates around hinge 20 to open or close passage 11; A lock body structure 40 is provided on the door frame 10 and the door leaf 30. When the door leaf 30 closes the passage 11, the lock body structure 40 locks the door leaf 30. And a sealing assembly 50, connected to the door leaf 30, which fits against the door frame 10 when the door leaf 30 closes the passage 11; The lock body structure 40 includes: two latches 41 symmetrically arranged on the door frame 10, with a first gap X between the latches 41 and the door leaf 30; and a transmission latch 42 connected to the door leaf 30, wherein when the transmission latch 42 engages with the latches 41, a second gap Y is formed between the transmission latch 42 and the door frame 10, and the door leaf 30 closes the passage 11; Specifically, when it is necessary to close the passage 11 on the door frame 10, the door leaf 30 rotates around the hinge 20 as the rotation center, the door leaf 30 blocks the passage 11, the transmission lock tongue 42 is operated, the transmission lock tongue 42 engages with the lock buckle 41, and the sealing component 50 fits against the door frame 10, thus realizing that the door leaf 30 closes the passage 11. The operation is relatively convenient and the transmission is relatively smooth. When it is necessary to open the passage 11 on the door frame 10, the transmission lock tongue 42 is operated, and the transmission lock tongue 42 and the latch 41 gradually separate. Pull the hand crank 42-5 on the transmission lock tongue 42, and the door leaf 30 rotates around the hinge 20 as the rotation center, so that the door leaf 30 can open the passage 11. The operation is relatively convenient and the transmission is relatively smooth. Because there is a first gap X between the latch 41 and the door leaf 30, the door leaf 30 will not scratch the latch 41. Because there is a second gap Y between the transmission latch 42 and the door frame 10, the transmission latch 42 will not contact the door frame 10 and will not scratch the door frame 10, thus reducing the chance of jamming and making the transmission relatively smooth. Another implementation method: like Figure 1 , Figure 2 , Figure 3 , Figure 11 As shown; in practice, the door frame 10 is a square frame structure, which is welded together from square tubes; The passage 11 is a square passage, with a regular shape, which is relatively aesthetically pleasing and facilitates the entry and exit of operators, making it relatively convenient to use; Among them, hinge 20 is a common structure in the prior art, such as a door hinge, used to connect door frame 10 and door leaf 30, so that door leaf 30 can rotate around hinge 20 as the rotation center to open or close passage 11. Those skilled in the art can directly and without doubt know how to set hinge 20 after seeing the disclosed content, without needing to put in creative effort or conduct excessive experiments. The door leaf 30 is assembled from square tubes 31, sheet metal 32, and round tubes 33 by welding. For example, the square tubes 31 are welded together to form a square frame structure, and the round tubes 33 are welded inside the square frame structure. The sheet metal 32 covers the outside of the square frame structure. This not only results in relatively high structural strength but also facilitates the installation of the lock body structure 40 and the sealing component 50. Figure 1 As shown, the lock body structure 40 is set at the square tube 31 and the round tube 33, which is conducive to the positioning of the lock body structure 40 and will not affect the normal rotation of the transmission lock tongue 42. Moreover, the square tube 31 and the round tube 33 can also protect the transmission lock tongue 42 and prevent the transmission lock tongue 42 from being directly hit, so the structural reliability is relatively good. For example: Figure 2 , Figure 3 As shown, the sealing component 50 is connected to the plate 32, which makes assembly relatively convenient; Another implementation method: like Figure 1 , Figure 2 , Figure 3 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 , Figure 10 , Figure 11 As shown; in practice, the latch 41 has a square shape, with a hollow space 41-1 in the middle and an opening 41-2 on one side edge, and the opening 41-2 is connected to the hollow space 41-1. The latch 41 is connected to the door frame 10 by screws, and its structural reliability is relatively good. The hollow space 41-1 and the opening 41-2 are provided to facilitate the engagement or disengagement of the transmission lock tongue 42 and the latch 41, reducing the chance of jamming. There is a first gap X between the latch 41 and the door leaf 30. During the opening or closing process, the door leaf 30 will not scratch the latch 41, and the transmission is relatively smooth. The transmission latch 42 includes: a worm gear structure 42-1, disposed on the door leaf 30; two adjustable connectors 42-2, symmetrically connected to the worm gear structure 42-1; two latch structures 42-3, symmetrically disposed and passing through the door leaf 30, one end of each latch structure 42-3 being connected to the adjustable connector 42-2, and the other end being engaged with the latch 41 at the opening 41-2 and the hollow space 41-1; and two limiting members 42-4, symmetrically disposed, for limiting the worm gear structure 42-1 and the adjustable connector 42-2. The connector 42-2 and the locking tongue structure 42-3; and the hand crank 42-5, one end of which is connected to the worm gear structure 42-1 for linkage with the rotation of the worm gear structure 42-1. The worm gear structure 42-1 is linked with the adjustable connector 42-2, the locking tongue structure 42-3 and the limiting member 42-4 to rotate synchronously. The other end of the locking tongue structure 42-3 enters or disengages from the hollow space 41-1 and the opening 41-2. After entering the hollow space 41-1, the locking tongue structure 42-3 engages with the latch 41. The worm gear structure 42-1 includes: a first splined shaft 42-11, disposed on the door leaf 30; two first retaining rings 42-12, spaced apart and connected to the first splined shaft 42-11, limiting the first splined shaft 42-11; a worm gear 42-13, connected to the first splined shaft 42-11; two second retaining rings 42-14, spaced apart and connected to the first splined shaft 42-11, limiting the worm gear 42-13; and a worm 42-15, disposed on the door leaf 30, meshing with the worm gear 42-13, and one end of the worm 42-15 is connected to the hand crank 42-5; The first snap ring 42-12 is a common structure in the prior art. It is snapped onto the first spline shaft 42-11, which is beneficial for positioning the first spline shaft 42-11 and the door leaf 30, and will not affect the normal rotation of the first spline shaft 42-11. A key is provided between the worm gear 42-13 and the first spline shaft 42-11, so that the first spline shaft 42-11 can rotate synchronously when the worm gear 42-13 rotates. The second snap ring 42-14 is a common structure in the prior art. It is snapped onto the first splined shaft 42-11, which is beneficial for positioning the worm gear 42-13. like Figure 9 As shown, the worm gear 42-15 is mounted on the square tube 31 on the door leaf 30 and meshes with the worm wheel 42-13. One end of the worm gear 42-15 is connected to the hand crank 42-5. When the hand crank 42-5 is rotated, the hand crank 42-5 is linked to the worm gear 42-15 to rotate, and the worm gear 42-15 is linked to the worm wheel 42-13 to rotate, resulting in relatively smooth transmission. The adjustable connector 42-2 is a double-ended bolt, one end of which is threaded to the worm gear structure 42-1 and the other end of which is threaded to the locking tongue structure 42-3. Assembly is relatively convenient. For example, the adjustable connector 42-2 is a stainless steel double-ended bolt, one end of which is a positive thread and the other end is a negative thread. Stainless steel double-ended bolts are used. As the stainless steel double-ended bolts rotate, the latch structure 42-3 moves up and down, so that the tongue body 42-33-2 on the latch structure 42-3 can match the position of the hollow space 41-1 and the opening 41-2. The tongue body 42-33-2 and the latch 41 have a relatively good matching effect, and there is a second gap Y between the tongue body 42-33-2 and the door frame 10. The tongue body 42-33-2 will not scratch the door frame 10, reducing the chance of jamming. The transmission is relatively smooth. Moreover, since the position of the latch structure 42-3 can be adjusted, especially for some large-volume airtight doors, the assembly flexibility is good, which can make up for the errors generated in the processing and manufacturing process and achieve the purpose of controlling the second gap Y. The locking tongue structure 42-3 includes: a second spline shaft 42-31, which is connected to the adjustable connector 42-2; an extension member 42-32, one end of which is connected to the second spline shaft 42-31; and a locking tongue 42-33, which is connected to the other end of the extension member 42-32. One end of the second splined shaft 42-31 is threaded to the adjustable connector 42-2, and the other end is welded to the extension 42-32; The extension piece 42-32 is a section of round tube, which is welded to the second spline shaft 42-31. The extension piece 42-32 passes through the round tube 33 on the door leaf 30 and is fitted with the round tube 33 with a clearance, which is relatively aesthetically pleasing. The latch 42-33 includes: a shaft segment 42-33-1 connected to the extension member 42-32; and a latch body 42-33-2 connected to the shaft segment 42-33-1, disposed outside the extension member 42-32, for engaging with the latch 41 at the opening 41-2 and the hollow space 41-1. The latch body 42-33-2 has a second gap Y between itself and the door frame 10. The shaft segment 42-33-1 and the extension member... Welding is performed between 42-32; the tongue body 42-33-2 has an approximately arc-shaped structure and is welded to the shaft section 42-33-1 to match the position of the hollow space 41-1 and the opening 41-2. The tongue body 42-33-2 and the latch 41 have a relatively good matching effect. Moreover, there is a second gap Y between the tongue body 42-33-2 and the door frame 10. The tongue body 42-33-2 will not scratch the door frame 10, reducing the chance of jamming and making the transmission relatively smooth. The limiting member 42-4 includes: an inner spline sleeve 42-41, which moves along the worm gear structure 42-1 and the locking tongue structure 42-3 and is fitted onto the worm gear structure 42-1 and the locking tongue structure 42-3; and at least two set screws 42-42, spaced apart, which are connected to the spline sleeve 42-41 and used to tighten the adjustable connector 42-2. The inner spline sleeve 42-41 is fitted onto the worm gear structure 42-1 and the locking tongue structure 42-3. Since the first spline shaft 42-11 has a spline, the second spline shaft 42-31 has a spline, and the inner spline sleeve 42-41 has a spline inside, the spline forms a guide, allowing the inner spline sleeve 42-41 to move along the first spline shaft 42-11 and the second spline shaft 42-31, thus achieving the purpose of limiting the first spline shaft 42-11 and the second spline shaft 42-31. The set screw 42-42 is threaded onto the inner spline sleeve 42-41, with one end pressing against the adjustable connector 42-2. This makes the worm gear structure 42-1, the adjustable connector 42-2, the locking tongue structure 42-3, and the limiting member 42-4 form a whole, resulting in relatively good synchronization during rotation, reducing the chance of jamming, and making the transmission relatively smooth. The hand crank 42-5 is a common structure in the prior art. It is inserted into one end of the worm gear 42-15 and used to rotate the worm gear 42-15. Those skilled in the art can directly and without doubt know how to set the hand crank 42-5 after seeing the disclosed content. They do not need to put in creative effort or conduct excessive experiments. Another implementation method: like Figure 2 , Figure 3 , Figure 4 As shown; in implementation, the sealing assembly 50 includes: a seal 51; a pressure strip 52 pressing on the seal 51; and a plurality of clamping screws 53 connected to the door leaf 30 to clamp the pressure strip 52 and the seal 51. The seal 51 is a common structure in the prior art, such as a sealing strip; The cross-section of the pressure strip 52 is "L" shaped, which helps to press down the seal 51; The clamping screw 53 is a commonly used screw in the prior art, used to clamp the pressure bar 52 and the seal 51; The sealing component 50 is provided. When the door leaf 30 closes the passage 11, the seal 51 fits against the door frame 10, ensuring the airtightness. Anyone skilled in the art, after seeing the disclosed content, can directly and without doubt know how to set the sealing component 50 without having to do creative work or conduct excessive experiments. In the description, it should be understood that the terms "up", "down", "left", "right", "front", "back", etc., indicate the orientation or positional relationship based on the positional relationship shown in the accompanying drawings. They are only for the convenience or simplification of the description and do not indicate a specific orientation that must be present. The operation process described in the embodiments is not an absolute usage step, and corresponding adjustments can be made in actual use. Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art; the words “first,” “second,” and similar terms used in the specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components, and similarly, the words “a” or “a” and similar terms do not determine a quantity limitation, but rather indicate the presence of at least one, as determined by the content of the embodiments; The above description is only a preferred embodiment, but the scope of protection is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art based on the technical solution and inventive concept within the scope of the technology disclosed should be included within the scope of protection.
Claims
1. A worm gear airtight door, characterized in that, include: A door frame having a passageway; Several hinges are connected to the door frame. A door leaf, connected to the hinge, the door leaf rotating around the hinge as the center of rotation, opens or closes the passage; A lock body structure is provided on the door frame and the door leaf, and the lock body structure locks the door leaf when the door leaf closes the passage; And a sealing assembly, connected to the door leaf, which fits against the door frame when the door leaf closes the passage; The lock body structure includes: two latches, symmetrically arranged on the door frame, with a first gap X between the latches and the door leaf; A transmission latch is connected to the door leaf. When the transmission latch engages with the latch, there is a second gap Y between the transmission latch and the door frame, and the door leaf closes the passage.
2. The worm gear airtight door according to claim 1, characterized in that: The door frame is a square frame structure; The channel is a square channel.
3. The worm gear airtight door according to claim 1, characterized in that: The latch has a square shape with a hollow space in the middle and an opening on one side edge, which is connected to the hollow space.
4. The worm gear airtight door according to claim 3, characterized in that: The transmission lock tongue includes a worm gear structure, which is disposed on the door leaf; Two adjustable connectors are symmetrically connected to the worm gear structure; Two locking tongue structures are symmetrically arranged and pass through the door leaf. One end of the locking tongue structure is connected to the adjustable connector, and the other end is used with the latch at the opening and the hollow space. Two limiting members are symmetrically arranged to limit the worm gear structure, the adjustable connecting member, and the locking tongue structure; The device includes a hand crank, one end of which is connected to the worm gear structure for rotating the worm gear structure. The worm gear structure rotates synchronously with the adjustable connector, the latch structure, and the limiting member. The other end of the latch structure enters or disengages from the hollow space and the opening. After entering the hollow space, the latch structure engages with the latch.
5. The worm gear airtight door according to claim 4, characterized in that: The worm gear structure includes: a first splined shaft, which is disposed on the door leaf; Two first retaining rings are connected at intervals to the first splined shaft to limit the first splined shaft; The worm gear is connected to the first splined shaft; Two second retaining rings are connected at intervals to the first splined shaft to limit the worm gear; A worm gear is disposed on the door leaf and meshes with the worm wheel, and one end of the worm gear is connected to the hand crank.
6. The worm gear airtight door according to claim 4, characterized in that: The adjustable connector is a double-ended bolt, one end of which is threaded to the worm gear structure, and the other end is threaded to the locking tongue structure.
7. The worm gear airtight door according to claim 4, characterized in that: The locking tongue structure includes: a second splined shaft, which is connected to the adjustable connector; The extension piece is connected at one end to the second splined shaft; And a locking tongue, which is connected to the other end of the extension.
8. The worm gear airtight door according to claim 7, characterized in that: The latch includes: a shaft segment connected to the extension member; The tongue body is connected to the shaft segment and disposed outside the extension member for use with the latch at the opening and the hollow space. The tongue body has a second gap Y between itself and the door frame.
9. The worm gear airtight door according to claim 4, characterized in that: The limiting component includes: an inner spline sleeve, which moves along the worm gear structure and the locking tongue structure and is fitted onto the worm gear structure and the locking tongue structure; And at least two set screws, spaced apart, the set screws being connected to the spline sleeve for tightening the adjustable connector.
10. The worm gear airtight door according to claim 1, characterized in that: The sealing assembly includes: a seal; A pressure strip is pressed onto the seal; And several clamping screws are connected to the door leaf to clamp the pressure strip and the seal.