Cabin door lock ring device

Abstract

The invention belongs to the technical field of airplane structure design, and particularly relates to a cabin door lock ring device. The device comprises a Y-direction adjusting toothed plate, a mounting base, a Z-direction adjusting toothed plate, a lock ring support and a lock ring shaft sleeve, the mounting base is of a U-shaped structure, a strip-shaped hole in the Y direction is formed in a bottom plate, a strip-shaped hole in the Z direction is formed in a side plate, a plurality of tooth grooves extending along the X axis are formed in the bottom of the bottom plate of the mounting base and used for being coupled with a plurality of tooth grooves in the Y-direction adjusting toothed plate, and the mounting base is connected with the Y-direction adjusting toothed plate through bolts. A plurality of tooth grooves extending along the Y axis are formed in the outer side of a side plate of the mounting base and used for being coupled with a plurality of tooth grooves in the Z-direction adjusting tooth plate, the mounting base is connected with the Y-direction adjusting tooth plate on the outer side of the side plate and the locking ring support on the inner side of the side plate through bolts, a bolt is arranged on the locking ring support, and the locking ring shaft sleeve is rotationally arranged on the bolt in a sleeving mode. The cabin door lock ring has the convenient vertical and lateral adjusting capacity, the reliability of the cabin door lock ring is improved, and the service life of the cabin door lock ring is prolonged.

Description

Technical Field

[0001] This application belongs to the field of aircraft structural design technology, and specifically relates to a door locking ring device. Background Technology

[0002] In the aerospace industry, the reliability, safety, and maintainability of cabin door locking systems are crucial design parameters. As one of the core components of this system, the cabin door locking ring works in conjunction with the locking mechanism on the door frame to securely lock the cabin door in the closed position, ensuring airtightness and structural safety during flight. For outward-opening aircraft doors, the locking ring device typically needs to withstand complex loads and requires extremely high installation precision.

[0003] Currently, the traditional hatch lock ring device widely used in the industry has gradually revealed the following two prominent technical defects and shortcomings in long-term application practice:

[0004] 1. Lack of adjustment function, making installation and maintenance difficult. Traditional locking ring devices have relatively fixed structures and generally lack effective and precise vertical and lateral adjustment measures. During initial aircraft assembly or subsequent maintenance and adjustments due to structural deformation or wear, technicians often have to rely on primitive methods such as shims and filing. This approach is not only inefficient but also prone to error accumulation, making it difficult to accurately and quickly achieve the ideal closed position of the door. Inaccurate closing positions can lead to poor door sealing, difficulty in engaging the locking hook and locking ring, or abnormal wear, directly affecting aircraft safety and operational economy.

[0005] 2. Insufficient lubrication leads to poor long-term reliability and a tendency to jam. Traditional door lock rings typically use a simple bushing structure for their rotating parts, resulting in inadequate lubrication design. After prolonged and frequent door opening and closing cycles, the lubricating oil is easily depleted or contaminated, leading to increased friction in the rotating parts and causing stiffness or even jamming. A jammed door lock ring directly causes difficulty in locking or unlocking the door mechanism, increasing the operational burden on the crew and ground staff, and even affecting the rapid opening of the door in emergencies, posing a safety hazard. Furthermore, lubricating and maintaining traditional door lock rings usually requires partial or complete disassembly, a cumbersome, time-consuming, labor-intensive, and costly process. Summary of the Invention

[0006] To address the aforementioned issues, this application provides a door lock ring device, which mainly includes a Y-axis adjusting toothed plate, a mounting base, a Z-axis adjusting toothed plate, a lock ring support, and a lock ring bushing.

[0007] The mounting base has a U-shaped structure. The bottom plate has a strip hole along the Y direction, and the side plate has a strip hole along the Z direction. The bottom of the bottom plate of the mounting base has multiple toothed grooves extending along the X axis for coupling with multiple toothed grooves on the Y-axis adjusting toothed plate. The mounting base is bolted to the Y-axis adjusting toothed plate. The outer side of the side plate of the mounting base has multiple toothed grooves extending along the Y axis for coupling with multiple toothed grooves on the Z-axis adjusting toothed plate. The mounting base is bolted to the Y-axis adjusting toothed plate on the outer side of the side plate and to the locking ring support on the inner side of the side plate. The locking ring support is equipped with bolts, and the locking ring bushing is rotatably sleeved on the bolts.

[0008] Preferably, the bolt is an oil-filled bolt with a threaded hole at the bolt head to accommodate an oil-filled nozzle.

[0009] Preferably, an oil-filled bushing is provided between the locking ring bushing and the bolt, the oil-filled bushing being interference-fitted with the locking ring bushing and clearance-fitted with the bolt.

[0010] Preferably, the inner wall of the oil injection bushing has a spiral oil guide groove.

[0011] Preferably, the locking ring support has an anti-rotation block next to the bolt head, the anti-rotation block abutting against the right-angle side of the bolt head.

[0012] Preferably, the locking ring bushing is a drum-shaped bushing.

[0013] Preferably, the width of the Y-axis adjusting tooth plate 1 is configured to be equal to the width of the mounting base in the Y-axis + the negative adjustment size of the mounting base in the Y-axis + the positive adjustment size of the mounting base in the Y-axis + the first floating value.

[0014] Preferably, the width of the side plate of the mounting base at the toothed groove is configured to be equal to the width of the Z-axis adjusting toothed plate in the Z-axis direction + the negative Z-axis adjustment size of the Z-axis adjusting toothed plate in the Z-axis direction + the positive Z-axis adjustment size of the Z-axis adjusting toothed plate in the Z-axis direction + the second floating value.

[0015] This application features convenient vertical and lateral adjustment capabilities and integrates a maintenance-free automatic lubrication system, effectively solving the industry pain points of traditional lock ring installation, positioning difficulties, and easy jamming, and significantly improving the reliability and service life of the hatch lock ring. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of a preferred embodiment of the door locking ring device of this application.

[0017] Figure 2 For this application Figure 1 A schematic diagram of the mounting base structure of the embodiment shown.

[0018] Figure 3 This application Figure 1A schematic diagram of the oil injection bushing structure of the embodiment shown.

[0019] 1-Y-direction adjusting gear plate, 2-Mounting base, 3-Z-direction adjusting gear plate, 4-Locking ring support, 5-Bolt, 6-Oil nozzle, 7-Locking ring bushing, 8-Oil bushing. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be described in more detail below with reference to the accompanying drawings. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are only some, not all, of the embodiments of this application. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application. The embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0021] This application provides a hatch lock ring device, such as Figures 1-3 As shown, it mainly includes a Y-axis adjusting toothed plate 1, a mounting base 2, a Z-axis adjusting toothed plate 3, a locking ring support 4, and a locking ring bushing 7;

[0022] The mounting base 2 has a U-shaped structure. The bottom plate has a strip hole along the Y direction, and the side plate has a strip hole along the Z direction. The bottom of the bottom plate of the mounting base 2 has multiple toothed grooves extending along the X axis for coupling with multiple toothed grooves on the Y-direction adjusting toothed plate 1. The mounting base 2 is bolted to the Y-direction adjusting toothed plate 1. The outer side of the side plate of the mounting base 2 has multiple toothed grooves extending along the Y axis for coupling with multiple toothed grooves on the Z-direction adjusting toothed plate 3. The mounting base 2 is bolted to the Y-direction adjusting toothed plate 1 on the outer side of the side plate and to the locking ring support 4 on the inner side of the side plate. The locking ring support 4 is provided with bolts 5, and the locking ring bushing 7 is rotatably sleeved on the bolts 5.

[0023] This application achieves adjustment functions in the Y (lateral) and Z (vertical) directions by coupling the toothed structure on the mounting base 2 with the Y-direction adjusting toothed plate 1 and the Z-direction adjusting toothed plate 3. The Y-direction adjusting toothed plate 1 is connected to the hatch, and the mounting base 2 can be adjusted in the Y direction relative to the Y-direction adjusting toothed plate 1. The lock ring support 4 can be adjusted in the Z direction relative to the mounting base 2. A lock ring bushing 7 is rotatably connected to the lock ring support 4, forming a lock ring that engages with the hook of the locking mechanism.

[0024] The core of this application is the toothed groove coupling adjustment. The X-direction toothed groove on the lower part of the mounting base plate meshes with the X-direction toothed groove of the Y-direction adjusting toothed plate. Different toothed groove combinations enable Y-direction adjustment, and after being fixed with bolts, it ensures that the Y-direction adjusting toothed plate and the mounting base 2 will not misalign in the Y-direction. Similarly, the Y-direction toothed groove on the outer side of the mounting base side plate meshes with the Y-direction toothed groove of the Z-direction adjusting toothed plate 3, ensuring that after being fixed with bolts, the mounting base 2 and the Z-direction adjusting toothed plate 3 will not misalign in the Z-direction.

[0025] When the hatch lock ring needs lateral adjustment, simply remove the mounting bolts between the Y-axis adjusting tooth plate 1 and the mounting base 2, adjust the mounting base 2 along the Y-axis, and then reinstall the bolts. When the hatch lock ring needs vertical adjustment, simply remove the mounting bolts between the mounting base 2, the Z-axis adjusting tooth plate 3, and the lock ring support 4, adjust both the left and right Z-axis adjusting tooth plates 3 simultaneously along the Z-axis, and then reinstall the lock ring support and bolts.

[0026] In some alternative embodiments, the bolt 5 is an oil injection bolt with a threaded hole at the bolt head for mounting an oil injection nozzle 6. This application upgrades a common connecting bolt into an inlet for a lubrication system. The threaded hole machined in the center of the oil injection bolt is used to install a standard oil injection nozzle, allowing lubricating oil to be injected directly into the device from the outside. Accordingly, lubrication can be performed through the oil injection nozzle without disassembling the entire locking ring device, greatly reducing maintenance difficulty, time, and cost, and meeting the high-efficiency requirements of aircraft maintenance.

[0027] In some alternative embodiments, an oil injection bushing 8 is provided between the locking ring bushing 7 and the bolt 5. The oil injection bushing 8 is interference-fitted with the locking ring bushing 7 and clearance-fitted with the bolt 5.

[0028] In some alternative embodiments, the inner wall of the oil injection bushing 8 is provided with a spiral oil guide groove.

[0029] As a replaceable wear-resistant component, the oil injection bushing directly bears the wear. When the bushing wears out, only the lower-priced bushing needs to be replaced, protecting the more expensive locking ring bushing and oil injection bolt, further reducing the total life cycle cost. Additionally, the oil injection bushing provides a platform for subsequent oil guide groove design; the spiral oil guide groove is a key design feature of the lubrication system. When lubricating oil is injected from the oil injection bolt, it flows into this spiral groove. As the locking ring rotates, the lubricating oil is evenly distributed across the entire friction pair surface along the trajectory of the spiral groove. The spiral structure has a certain pumping effect, which helps to retain and replenish the lubricating oil during movement.

[0030] In some alternative embodiments, an anti-rotation block is provided on the locking ring support 4 next to the bolt head of the bolt 5, the anti-rotation block abutting against the right-angled side of the bolt head. This design ensures that during the operation of the locking ring, only the locking ring bushing 7 and the oil injection bushing 8 rotate, while the oil injection bolt 5 remains fixed. This prevents loosening caused by accidental bolt rotation or changes in the direction of the oil injection nozzle, ensuring the reliability of the system.

[0031] In some alternative embodiments, the locking ring bushing 7 is a drum-shaped bushing. A drum-shaped bushing refers to a bushing whose diameter in the middle is slightly larger than the diameters at both ends, resembling a drum. The drum-shaped design can release a small degree of freedom of deflection around the Y direction. When there is slight misalignment between the locking hook and the locking ring, the drum-shaped bushing can adaptively swing slightly, avoiding edge contact and uneven wear, making the force more even, and greatly improving the tolerance to installation errors and structural deformation.

[0032] In some alternative embodiments, the width of the Y-axis adjusting tooth plate 1 in the Y-axis direction is configured to be equal to the width of the mounting base 2 in the Y-axis direction + the negative adjustment size of the mounting base 2 in the Y-axis direction + the positive adjustment size of the mounting base 2 in the Y-axis direction + a first floating value.

[0033] In some alternative embodiments, the width of the side plate of the mounting base 2 at the toothed groove is configured to be equal to the width of the Z-axis adjusting toothed plate 3 in the Z-axis direction + the negative Z-axis adjustment size of the Z-axis adjusting toothed plate 3 in the Z-axis direction + the positive Z-axis adjustment size of the Z-axis adjusting toothed plate 3 in the Z-axis direction + a second floating value.

[0034] In the above embodiments, the first and second floating values ​​are, for example, 2 mm. These dimensions are configured to ensure that the adjusting toothed plate has sufficient room to move on the mounting base, i.e., to adjust the stroke, while avoiding structural interference.

[0035] In addition, the inner X-direction width of the locking ring support 4 should be greater than the X-direction deformation of the hatch. For example, the inner X-direction width of the locking ring support 4 = the positive X-direction deformation of the hatch + the negative X-direction deformation of the hatch + 5mm.

[0036] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A hatch door locking ring device, characterized in that, It includes a Y-axis adjusting toothed plate (1), a mounting base (2), a Z-axis adjusting toothed plate (3), a locking ring support (4), and a locking ring bushing (7); The mounting base (2) is a U-shaped structure. The bottom plate has a strip hole along the Y direction, and the side plate has a strip hole along the Z direction. The bottom of the bottom plate of the mounting base (2) has multiple toothed grooves extending along the X axis, which are used to couple with multiple toothed grooves on the Y-direction adjusting toothed plate (1). The mounting base (2) is bolted to the Y-direction adjusting toothed plate (1). The outer side of the side plate of the mounting base (2) has multiple toothed grooves extending along the Y axis, which are used to couple with multiple toothed grooves on the Z-direction adjusting toothed plate (3). The mounting base (2) is bolted to the Y-direction adjusting toothed plate (1) on the outer side of the side plate and to the locking ring support (4) on the inner side of the side plate. The locking ring support (4) is provided with bolts (5), and the locking ring bushing (7) is rotatably sleeved on the bolts (5).

2. The hatch door locking ring device as described in claim 1, characterized in that, The bolt (5) is an oil injection bolt with a threaded hole at the bolt head, which is adapted to install an oil injection nozzle (6).

3. The hatch door locking ring device as described in claim 2, characterized in that, There is an oil injection bushing (8) between the locking ring bushing (7) and the bolt (5). The oil injection bushing (8) is interference-fitted with the locking ring bushing (7) and clearance-fitted with the bolt (5).

4. The hatch door locking ring device as described in claim 3, characterized in that, The inner wall of the oil injection bushing (8) has a spiral oil guide groove.

5. The hatch door locking ring device as described in claim 3, characterized in that, An anti-rotation block is provided on the locking ring support (4) next to the bolt head of the bolt (5), and the anti-rotation block abuts against the right-angle side of the bolt head.

6. The hatch door locking ring device as described in claim 3, characterized in that, The locking ring bushing (7) is a drum-shaped bushing.

7. The hatch door locking ring device as described in claim 1, characterized in that, The width of the Y-direction adjusting tooth plate 1 in the Y-direction is configured to be equal to the width of the mounting base (2) in the Y-direction + the negative adjustment size of the mounting base (2) in the Y-direction + the positive adjustment size of the mounting base (2) in the Y-direction + the first floating value.

8. The hatch door locking ring device as described in claim 1, characterized in that, The width of the side plate of the mounting base (2) at the toothed groove is configured to be equal to the width of the Z-direction adjustment toothed plate (3) in the Z direction + the negative adjustment size of the Z-direction adjustment toothed plate (3) in the Z direction + the positive adjustment size of the Z-direction adjustment toothed plate (3) in the Z direction + the second floating value.

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