A translating outboard door hinge mechanism
By incorporating a double parallelogram mechanism at the aircraft door hinge, the vibration and space occupation issues in existing technologies are resolved, achieving high reliability and smooth movement of the sliding outward-opening door hinge mechanism, which is suitable for the design of service doors for civil aircraft.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- XIAN AIRCRAFT DESIGN INST OF AVIATION IND OF CHINA
- Filing Date
- 2023-12-31
- Publication Date
- 2026-06-26
AI Technical Summary
Existing aircraft door hinge mechanisms suffer from vibration and space occupation issues when sliding outwards to open, especially when Boeing aircraft use chain-type conversion mechanisms, which cause significant vibrations. Airbus aircraft use parallel rod-type conversion mechanisms, which encroach on the door opening space.
The design employs a double parallelogram mechanism, which combines a main hinge support, a lifting assist component, a main hinge, a double-ear rocker arm, a main rocker arm, a curved tie rod, and a straight tie rod to achieve the conversion of the door's rotation angle, ensuring smooth movement without occupying the door opening space.
It enables the hatch to slide outwards, reducing vibration, ensuring high reliability and maintainability, while not occupying hatch opening space, and the movement is smooth and noiseless.
Smart Images
Figure CN117868621B_ABST
Abstract
Description
Technical Field
[0001] This application belongs to the field of aircraft door hinge mechanisms, and specifically relates to a door hinge mechanism that slides outward. Background Technology
[0002] To enhance reliability and stability, existing advanced Type A and B cabin doors (service doors, boarding doors, etc.) typically employ an outward sliding opening mechanism following an initial inward movement. However, the door structure is mostly a fixed-axis rotation relative to the hinge axis. To achieve the outward sliding opening, a reverse angle conversion mechanism is usually needed to counteract the rotation angle of the door structure, thus achieving the sliding effect. Currently, Boeing aircraft use a chain-type conversion mechanism at the hinge, while Airbus aircraft use a parallel lever-type conversion mechanism at the top of the door. The former often generates vibration during use, while the latter's mechanism placement encroaches on the door opening space.
[0003] Therefore, it is desirable to have a technical solution to overcome or at least mitigate one of the aforementioned defects of the prior art. Summary of the Invention
[0004] The purpose of this application is to provide a sliding outward opening hatch hinge mechanism to solve at least one problem existing in the prior art.
[0005] The technical solution of this application is:
[0006] A sliding outward-opening hatch hinge mechanism, comprising:
[0007] A main hinge support is fixedly installed on the machine body, and the main hinge support has a first connecting part and a second connecting part;
[0008] A lifting assist assembly includes a lifting sleeve and a splined shaft. The lifting sleeve is nested inside the splined shaft, and a hinge joint is installed on the splined shaft. The lifting assist assembly is connected to the hatch via the hinge joint.
[0009] The main hinge includes a first main hinge arm and a second main hinge arm. The first main hinge arm is hinged to the first connecting part of the main hinge support, and the second main hinge arm is hinged to the lifting sleeve of the lifting assist assembly. A double-ear rocker arm mounting support is provided on the second main hinge arm.
[0010] A dual-ear rocker arm, wherein the dual-ear rocker arm is hinged to a dual-ear rocker arm mounting bracket, and the dual-ear rocker arm has a first rocker arm portion and a second rocker arm portion, wherein a predetermined included angle is formed between the first rocker arm portion and the second rocker arm portion.
[0011] The main rocker arm, one end of which is connected to the splined shaft of the lifting assist assembly;
[0012] A curved tie rod, one end of which is hinged to the other end of the main rocker arm, and the other end of which is hinged to the first rocker arm portion of the double-ear rocker arm;
[0013] A straight pull rod, one end of which is hinged to the second rocker arm portion of the double-ear rocker arm, and the other end of which is hinged to the second connecting portion of the main hinge support.
[0014] In at least one embodiment of this application, the main hinge support is fixedly mounted on the machine body by bolts.
[0015] In at least one embodiment of this application, the main hinge is connected to the main hinge support by bolts and bushings.
[0016] In at least one embodiment of this application, the first main hinge arm and the second main hinge arm of the main hinge are arranged in an L-shape.
[0017] In at least one embodiment of this application, the curved tie rod has three straight rod segments connected in sequence, with a predetermined included angle between any two adjacent straight rod segments.
[0018] In at least one embodiment of this application, the main hinge support, the main hinge, the lifting assist component, the hinge joint, the main rocker arm, the curved tie rod, the double-ear rocker arm, and the straight tie rod are all machined parts made of 7050 aluminum alloy.
[0019] The invention has at least the following beneficial technical effects:
[0020] The sliding outward opening hatch hinge mechanism of this application has a double parallelogram mechanism at the hinge to change the hatch rotation angle. While ensuring high reliability and maintainability, it moves smoothly, without noise and does not encroach on the hatch opening space. Attached Figure Description
[0021] Figure 1 This is a schematic diagram of a translational outward-opening hatch hinge mechanism according to one embodiment of this application;
[0022] Figure 2 This is a schematic diagram of the operation of a translational outward-opening hatch hinge mechanism according to one embodiment of this application.
[0023] in:
[0024] 1-Main hinge support; 2-Main hinge; 3-Lifting assist component; 4-Hinge connector; 5-Main rocker arm; 6-Curved tie rod; 7-Double-ear rocker arm; 8-Straight tie rod. Detailed Implementation
[0025] 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 some, but not all, 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.
[0026] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this application.
[0027] The following is in conjunction with the appendix Figures 1 to 2 This application will be described in further detail.
[0028] This application provides a sliding outward opening hatch hinge mechanism, including: a main hinge support 1, a lifting assist component 3, a main hinge 2, a double-ear rocker arm 7, a main rocker arm 5, a curved tie rod 6, and a straight tie rod 8.
[0029] Specifically, such as Figure 1As shown, the main hinge support 1 is fixedly mounted on the fuselage by bolts. The main hinge support 1 has a first connecting part and a second connecting part. The lifting assist assembly 3 includes a lifting sleeve and a splined shaft. The lifting sleeve is nested inside the splined shaft, and the two are connected by a sliding pair with a limit. A hinge joint 4 is installed on the splined shaft, and the lifting assist assembly 3 is connected to the hatch through the hinge joint 4. The main hinge 2 includes a first main hinge arm and a second main hinge arm. The first main hinge arm and the second main hinge arm are arranged in an L-shape. The first main hinge arm is hinged to the first connecting part of the main hinge support 1 by bolts and bushings, and the second main hinge arm is connected to the lifting sleeve. The lifting sleeve of the assist component 3 is hinged, and a double-ear rocker arm mounting bracket is provided on the second main hinge arm; the double-ear rocker arm 7 is hinged to the double-ear rocker arm mounting bracket, and the double-ear rocker arm 7 has a first rocker arm part and a second rocker arm part, with a predetermined included angle between the first rocker arm part and the second rocker arm part; one end of the main rocker arm 5 is connected to the spline shaft of the lifting assist component 3; one end of the curved tie rod 6 is hinged to the other end of the main rocker arm 5, and the other end of the curved tie rod 6 is hinged to the first rocker arm part of the double-ear rocker arm 7; one end of the straight tie rod 8 is hinged to the second rocker arm part of the double-ear rocker arm 7, and the other end of the straight tie rod 8 is hinged to the second connecting part of the main hinge bracket 1.
[0030] The sliding outward-opening hatch hinge mechanism of this application features a double parallelogram mechanism at the hinge for hatch rotation angle conversion. Specifically, the connection points of the first rocker arm portion of the double-eared rocker arm 7 with the double-eared rocker arm mounting support, the first rocker arm portion of the double-eared rocker arm 7 with the curved tie rod 6, the curved tie rod 6 with the main rocker arm 5, and the main rocker arm 5 with the lifting assist component 3 constitute parallelogram mechanism I. The connection points of the main hinge 2 with the main hinge support 1, the main hinge 2 with the straight tie rod 8, the straight tie rod 8 with the second rocker arm portion of the double-eared rocker arm 7, and the second rocker arm portion of the double-eared rocker arm 7 with the double-eared rocker arm mounting support constitute parallelogram mechanism II.
[0031] In a preferred embodiment of this application, the curved tie rod 6 has three straight rod segments connected in sequence, with a predetermined included angle between any two adjacent straight rod segments.
[0032] In the preferred embodiment of this application, the main hinge support 1, main hinge 2, lifting assist component 3, hinge joint 4, main rocker arm 5, curved tie rod 6, double-ear rocker arm 7, and straight tie rod 8 are all machined parts of 7050 aluminum alloy. The processing technology is mature, the processing reliability is high, and the size and tolerance of the parts are easy to guarantee.
[0033] The sliding outward-opening hatch hinge mechanism of this application has a parallelogram mechanism II whose left hinge point is hinged to the main hinge support 1. When the main hinge 2 rotates in the opening direction, the double-eared rocker arm 7 of this mechanism rotates in the opposite direction relative to the main hinge 2. Figure 1In the direction of the arrow, parallelogram mechanism II rotates clockwise synchronously with parallelogram mechanism I. Double-ear rocker arm 7 drives straight pull rod 8, straight pull rod 8 drives main rocker arm 5 to rotate, main rocker arm 5 drives spline shaft on lifting assist component 3 to rotate clockwise, and the hatch rotates counterclockwise under the drive of spline shaft, thus completing the corresponding function.
[0034] The sliding outward-opening hatch hinge mechanism of this application has a double parallelogram mechanism at the hinge. The movement of this mechanism is related to the rotation of the main hinge. It can drive the hatch to rotate around the pivot that is hinged to the main hinge in the opposite direction but equal in magnitude to the rotation of the main hinge, thereby converting the hatch rotation angle and ensuring that the hatch moves parallel to the fuselage shape when it is opened.
[0035] The sliding outward-opening cabin door hinge mechanism of this application ensures high reliability and maintainability while exhibiting smooth, noiseless movement and not encroaching on the cabin door opening space. This application has been successfully applied to the design of a service door for a civil aircraft, and assembly and use have demonstrated that its functions meet the requirements, possessing good economic efficiency as well as excellent assembly and usability.
[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 sliding outward-opening hatch hinge mechanism, characterized in that, include: Main hinge support (1), the main hinge support (1) is fixedly installed on the machine body, the main hinge support (1) has a first connecting part and a second connecting part; The lifting assist assembly (3) includes a lifting sleeve and a spline shaft. The lifting sleeve is nested inside the spline shaft. A hinge joint (4) is installed on the spline shaft. The lifting assist assembly (3) is connected to the hatch through the hinge joint (4). The main hinge (2) includes a first main hinge arm and a second main hinge arm. The first main hinge arm is hinged to the first connecting part of the main hinge support (1), and the second main hinge arm is hinged to the lifting sleeve of the lifting assist component (3). A double-ear rocker arm mounting support is provided on the second main hinge arm. A double-ear rocker arm (7) is hinged to a double-ear rocker arm mounting bracket. The double-ear rocker arm (7) has a first rocker arm portion and a second rocker arm portion, and there is a predetermined included angle between the first rocker arm portion and the second rocker arm portion. Main rocker arm (5), one end of which is connected to the spline shaft of the lifting assist assembly (3); A curved tie rod (6) is provided, one end of which is hinged to the other end of the main rocker arm (5), and the other end of which is hinged to the first rocker arm portion of the double-ear rocker arm (7). A straight pull rod (8) is provided, one end of which is hinged to the second rocker arm of the double-ear rocker arm (7), and the other end of which is hinged to the second connecting part of the main hinge support (1).
2. The outward-opening hatch hinge mechanism according to claim 1, characterized in that, The main hinge support (1) is fixedly installed on the machine body by bolts.
3. The outward-opening hatch hinge mechanism according to claim 1, characterized in that, The first main hinge arm is connected to the main hinge support (1) by bolts and bushings.
4. The outward-opening hatch hinge mechanism according to claim 3, characterized in that, The first main hinge arm and the second main hinge arm of the main hinge (2) are arranged in an L-shape.
5. The outward-opening hatch hinge mechanism according to claim 1, characterized in that, The curved tie rod (6) has three straight rod segments connected in sequence, with a predetermined included angle between two adjacent straight rod segments.
6. The outward-opening hatch hinge mechanism according to claim 1, characterized in that, The main hinge support (1), the main hinge (2), the lifting assist component (3), the hinge joint (4), the main rocker arm (5), the curved tie rod (6), the double-ear rocker arm (7), and the straight tie rod (8) are all machined parts made of 7050 aluminum alloy.