Bidirectional oxygen cabin door catch mechanical structure convenient to limit

Abstract

The utility model discloses a two-way oxygen cabin door catch mechanical structure convenient to limit, and relates to the technical field of door catches, the two-way oxygen cabin door catch mechanical structure comprises a hand wheel and a push block, one side of the hand wheel is fixedly connected with a connecting shaft through a bolt, and the outer side of the connecting shaft is movably connected with a fixing sleeve through a bearing. According to the two-way oxygen cabin door latch mechanical structure convenient to limit, a handle is pulled to move, when the handle moves, a connecting rod is driven to extrude a first spring on one side, and when the connecting rod moves to break away from extrusion on a first shifting rod, the handle can be rotated to drive a connecting shaft and a crank to rotate together; the arc surface on one side of the push block can move towards the interior of the crank when making contact with the cabin door, after the crank rotates by 90 degrees, the handle can be loosened, at the moment, the first spring can reset, the connecting rod is pushed to extrude the first shifting rod, the first shifting rod rotates, the push block is shifted to move, and the push block can adapt to deformation of the cabin door; and the cabin door is pushed to cling to the micro-pressure oxygen cabin.

Description

Technical Field

[0001] The utility model relates to the technical field of door latches, in particular to a bidirectional oxygen chamber door latch mechanical structure which is convenient for limiting position. Background Art

[0002] The door of the micro-compression oxygen chamber needs to be closed during pressurization, and the door is limited by a latch to prevent the door from opening during pressurization, resulting in pressurization failure. The latch is a simple tool or device used to close the door and prevent it from being opened.

[0003] When closing the hatch of the micro-pressure oxygen chamber, it is necessary to limit the hatch by means of a door latch. When closing the deformed hatch, the existing two-way oxygen chamber door latch mechanical structure will rotate the bolt on one side of the crank to make the bolt contact with the hatch, and limit the deformed hatch by means of the movable bolt. However, this method of limiting the hatch is relatively troublesome to operate. At the same time, when the crank is turned to open the hatch, the bolt on one side will contact with the hatch, causing scratches on the hatch. Utility Model Content

[0004] The utility model aims to provide a two-way oxygen cabin door latch mechanical structure which is convenient for limiting the position, so as to solve the problem that the existing two-way oxygen cabin door latch mechanical structure proposed in the background technology is not convenient for limiting the cabin door.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a mechanical structure of a two-way oxygen chamber door latch with convenient position limiting, comprising: a hand wheel and a push block, one side of the hand wheel is fixedly connected to a connecting shaft by a bolt, the outer side of the connecting shaft is movably connected to a fixing sleeve by a bearing, the end of the connecting shaft away from the hand wheel is fixedly connected to a crank by a thread, and the fixing sleeve is fixedly connected to the two-way oxygen chamber door on the side close to the hand wheel,

[0006] The handwheel and the connecting shaft are both provided with sliding grooves for the connecting rod to slide, a handle is welded and fixed to one end of the connecting rod, a first spring is sleeved on the end of the connecting rod close to the handle, one end of the first spring is connected to the handwheel, a first lever is movably connected to the inside of the crank via a rotating shaft, a push block is slidably connected to one side of the first lever, and a second lever is slidably connected to the inside of the push block.

[0007] Preferably, a movable groove for sliding with the first lever and the second lever is provided inside the push block, and a movable groove for sliding of the push block is provided inside the crank.

[0008] Preferably, the outer side of the second lever is movably connected to the crank via a rotating shaft, and one end of the second lever is slidably connected to a connecting block.

[0009] Preferably, a sliding groove matching the second lever is provided on one side of the connecting block, and a sliding groove for the connecting block to slide is provided inside the crank.

[0010] Preferably, a sealing block is fixedly connected to one side of the fixing sleeve, a second spring is fixedly connected inside the sealing block, a sealing ring is fixedly connected to one end of the second spring, and a protrusion is fixedly connected to one side of the sealing ring.

[0011] Preferably, a groove matching the protrusion is formed on a side of the sealing ring away from the protrusion, and an annular sealing groove matching the sealing ring is formed on the outer side of the connecting shaft.

[0012] Preferably, the protrusions are provided in four groups and are distributed at equal angles with respect to the central axis of the sealing block, and a through hole for the connecting shaft to slide is provided inside the sealing block.

[0013] Compared with the prior art, the beneficial effect of the convenient limited bidirectional oxygen cabin door latch mechanical structure is: by pulling the handle, the connecting rod is driven to move and disengage from the squeezing of the first lever, and then the handle can be turned to drive the connecting shaft and the crank to rotate together, and the arc surface on one side of the push block will move toward the inside of the crank when it contacts the cabin door. After the crank is rotated 90°, the handle can be released. At this time, the first spring will reset, pushing the connecting rod to squeeze the first lever and toggle the push block to move. The push block will adapt to the deformation of the cabin door and push the cabin door to fit tightly against the micro-pressure oxygen cabin. By arranging a sealing block on one side of the fixed sleeve, when the connecting shaft passes through the sealing block, the connecting shaft will squeeze the protrusion, and when the sealing ring contacts the annular sealing groove on the outside of the connecting rod, the second spring will reset, pushing the sealing ring into the annular sealing groove of the connecting rod, thereby sealing the connection between the sealing block and the connecting shaft.

[0014] 1. When closing the hatch of the micro-compression oxygen chamber, it is necessary to limit the hatch by the door latch and move it by pulling the handle. When the handle moves, it will drive the connecting rod to squeeze the first spring on one side. When the connecting rod moves out of the squeezing of the first lever, the handle can be turned to drive the connecting shaft and the crank to rotate together. The arc surface on one side of the push block will move toward the inside of the crank when it contacts the hatch. When the crank is rotated 90°, the handle can be released. At this time, the first spring will reset, pushing the connecting rod to squeeze the first lever, causing the first lever to rotate and drive the push block to move. The push block will adapt to the deformation of the hatch and push the hatch to fit tightly against the micro-compression oxygen chamber. In this way, the hatch door of the micro-compression oxygen chamber can be limited through the above operation.

[0015] 2. When closing the hatch of the micro-compression oxygen chamber, it is necessary to limit the hatch by means of a latch. In order to improve the sealing performance of the connection between the micro-compression oxygen chamber and the connecting shaft, a sealing block is arranged on one side of the fixed sleeve. When the connecting shaft passes through the sealing block, the connecting shaft will squeeze the protrusion, and the protrusion will shrink into the inside of the sealing block. When the sealing ring contacts the annular sealing groove on the outside of the connecting rod, the second spring will reset and push the sealing ring into the annular sealing groove of the connecting rod to seal the connection between the sealing block and the connecting shaft. The above operation can facilitate the sealing of the connecting shaft and the micro-compression oxygen chamber. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the main cross-section of the utility model;

[0017] Figure 2 This is a schematic diagram of the connection between the door latch and the micro-pressure oxygen chamber of the utility model;

[0018] Figure 3 It is an enlarged schematic diagram of A of the utility model;

[0019] Figure 4 This is a right side cross-sectional schematic diagram of the hand wheel of the utility model;

[0020] Figure 5 This is a right side schematic diagram of the connecting shaft of the utility model;

[0021] Figure 6 This is a right side cross-sectional schematic diagram of the sealing block of the utility model;

[0022] Figure 7 It is a schematic diagram of the sealing ring combination of the utility model.

[0023] In the figure: 1. hand wheel; 2. connecting shaft; 3. fixing sleeve; 4. crank; 5. connecting rod; 6. handle; 7. first spring; 8. first lever; 9. push block; 10. second lever; 11. connecting block; 12. sealing block; 13. second spring; 14. sealing ring; 15. protrusion; 16. groove. DETAILED DESCRIPTION

[0024] 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.

[0025] See also Figure 1-Figure 5The utility model provides a technical solution: a two-way oxygen chamber door latch mechanical structure with convenient position limiting, comprising: a hand wheel 1 and a push block 9, one side of the hand wheel 1 is fixedly connected to a connecting shaft 2 by bolts, the outer side of the connecting shaft 2 is movably connected to a fixing sleeve 3 by a bearing, the end of the connecting shaft 2 away from the hand wheel 1 is fixedly connected to a crank 4 by a thread, and the fixing sleeve 3 is fixedly connected to the two-way oxygen chamber door on the side close to the hand wheel 1,

[0026] The handwheel 1 and the connecting shaft 2 are both provided with a sliding groove for the connecting rod 5 to slide, and a handle 6 is welded and fixed at one end of the connecting rod 5, and a first spring 7 is sleeved on the end of the connecting rod 5 close to the handle 6, and one end of the first spring 7 is connected to the handwheel 1; the inside of the crank 4 is movably connected with a first lever 8 through a rotating shaft, and a push block 9 is slidably connected to one side of the first lever 8, and the inside of the push block 9 is slidably connected to the second lever 10; the inside of the push block 9 is provided with a movable groove for sliding with the first lever 8 and the second lever 10, and the inside of the crank 4 is provided with a movable groove for sliding the push block 9; the outer side of the second lever 10 is movably connected to the crank 4 through a rotating shaft, and one end of the second lever 10 is slidably connected to a connecting block 11; one side of the connecting block 11 is provided with a sliding groove matching the second lever 10, and the inside of the crank 4 is provided with a sliding groove for sliding the connecting block 11, the first lever 8 forms a rotating structure with the crank 4 through the rotating shaft, and the push block 9 forms a sliding structure with the crank 4.

[0027] When the handle 6 is pulled, the first spring 7 is reset, pushing the connecting rod 5 to squeeze the first lever 8, so that the first lever 8 can be rotated and the push block 9 can be moved. The push block 9 can adapt to the deformation of the door and push the door to fit tightly with the micro-compression oxygen chamber.

[0028] When it is necessary to open the door of the micro-compression oxygen chamber, the handle 6 can be pulled again to drive the connecting rod 5 to disengage the squeezing of the first lever 8, so that the push block 9 no longer squeezes the door, and then the crank handle 4 can be easily turned to disengage the limitation on the door. When opening and closing the door from the inside, the index finger can be pressed against one side of the arc-shaped boss at the bottom of the crank handle 4, and the thumb can press the connecting block 11. When the connecting block 11 moves, it will push the second lever 10, so that the second lever 10 drives the push block 9 to enter the inside of the crank handle 4. At this time, the crank handle 4 can be turned to limit the door or leave one side of the door. In this way, the above operation can facilitate the limitation of the door of the micro-compression oxygen chamber.

[0029] See also Figure 1 , Figure 3 , Figure 6 and Figure 7 A sealing block 12 is fixedly connected to one side of the fixed sleeve 3, a second spring 13 is fixedly connected to the inside of the sealing block 12, a sealing ring 14 is fixedly connected to one end of the second spring 13, and a protrusion 15 is fixedly connected to one side of the sealing ring 14; a groove 16 matching the protrusion 15 is provided on the side of the sealing ring 14 away from the protrusion 15, and an annular sealing groove matching the sealing ring 14 is provided on the outer side of the connecting shaft 2; four groups of protrusions 15 are arranged, and are distributed at equal angles with respect to the central axis of the sealing block 12, a through hole for the sliding of the connecting shaft 2 is provided inside the sealing block 12, and the sealing ring 14 and the sealing block 12 constitute a sliding structure.

[0030] In specific implementation, when closing the hatch of the micro-compression oxygen chamber, it is necessary to limit the hatch by a latch. In order to improve the sealing performance of the connection between the micro-compression oxygen chamber and the connecting shaft 2, a sealing block 12 is arranged on one side of the fixing sleeve 3. When the connecting shaft 2 passes through the sealing block 12, the connecting shaft 2 will squeeze the protrusion 15. When the protrusion 15 moves, it will squeeze the second spring 13 on one side to shrink it. When the sealing ring 14 contacts the annular sealing groove on the outside of the connecting rod 5, the second spring 13 will reset and push the sealing ring 14 into the annular sealing groove of the connecting rod 5. At the same time, the four groups of sealing rings 14 will be connected end to end, and the protrusion 15 on one side of one group of sealing rings 14 will enter the groove 16 on one side of another group of sealing rings 14, thereby improving the sealing effect of the sealing block 12. In this way, the above operation can facilitate the sealing of the connecting shaft 2 and the micro-compression oxygen chamber.

[0031] To sum up: when using the bidirectional oxygen chamber door latch mechanical structure that is convenient for limiting, first install the fixing sleeve 3 into the inside of the micro-compression oxygen chamber, then pass the connecting shaft 2 through the micro-compression oxygen chamber and the fixing sleeve 3, and install the handwheel 1 to the end of the connecting shaft 2 located on the outside of the micro-compression oxygen chamber by bolts, and install the crank 4 to the end of the connecting shaft 2 located on the inside of the micro-compression oxygen chamber by bolts. At this time, the door latch can be used. This is the feature of the bidirectional oxygen chamber door latch mechanical structure that is convenient for limiting. The contents not described in detail in this description belong to the prior art known to professional and technical personnel in this field.

[0032] 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 two-way oxygen chamber door latch mechanical structure that is convenient for limiting position, comprising: A hand wheel (1) and a push block (9), wherein one side of the hand wheel (1) is fixedly connected to a connecting shaft (2) by means of bolts, the outer side of the connecting shaft (2) is movably connected to a fixing sleeve (3) by means of a bearing, the end of the connecting shaft (2) away from the hand wheel (1) is fixedly connected to a crank (4) by means of a thread, and the side of the fixing sleeve (3) close to the hand wheel (1) is fixedly connected to a two-way oxygen cabin door, characterized in that: The hand wheel (1) and the connecting shaft (2) are both provided with a slide groove for the connecting rod (5) to slide, a handle (6) is welded and fixed to one end of the connecting rod (5), a first spring (7) is sleeved on one end of the connecting rod (5) close to the handle (6), one end of the first spring (7) is connected to the hand wheel (1), a first lever (8) is movably connected to the inside of the crank (4) via a rotating shaft, a push block (9) is slidably connected to one side of the first lever (8), and a second lever (10) is slidably connected to the inside of the push block (9).

2. A two-way oxygen chamber door latch mechanical structure with convenient position limiting according to claim 1, characterized in that: The push block (9) has an interior formed with a movable groove for sliding with the first shift rod (8) and the second shift rod (10), and the crank handle (4) has an interior formed with a movable groove for the push block (9) to slide.

3. A two-way oxygen chamber door latch mechanical structure with convenient position limiting according to claim 2, characterized in that: The outer side of the second lever (10) is movably connected to the crank (4) via a rotating shaft, and one end of the second lever (10) is slidably connected to a connecting block (11).

4. A two-way oxygen chamber door latch mechanical structure with convenient position limiting according to claim 3, characterized in that: A sliding groove matching the second lever (10) is provided on one side of the connecting block (11), and a sliding groove for the connecting block (11) to slide is provided inside the crank handle (4).

5. The conveniently limited bidirectional oxygen chamber door latch mechanical structure according to claim 1 is characterized in that: A sealing block (12) is fixedly connected to one side of the fixing sleeve (3), a second spring (13) is fixedly connected inside the sealing block (12), a sealing ring (14) is fixedly connected to one end of the second spring (13), and a protrusion (15) is fixedly connected to one side of the sealing ring (14).

6. A two-way oxygen chamber door latch mechanical structure with convenient position limiting according to claim 5, characterized in that: A groove (16) matching the protrusion (15) is formed on a side of the sealing ring (14) away from the protrusion (15), and an annular sealing groove matching the sealing ring (14) is formed on the outer side of the connecting shaft (2).

7. A conveniently limited bidirectional oxygen chamber door latch mechanical structure according to claim 6, characterized in that: The protrusions (15) are provided in four groups and are distributed at equal angles with respect to the central axis of the sealing block (12); a through hole for the connecting shaft (2) to slide is provided inside the sealing block (12).

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