Variable-axis hinge mechanism

Abstract

The invention provides a variable-axis hinge mechanism, and belongs to the field of aircraft cabin door mechanism design, a hinge support is fixedly connected with a fuselage opening frame structure and used for supporting all moving components of the variable-axis hinge mechanism, and a hinge rotating shaft can do variable-axis movement along an L-shaped sliding groove of the hinge support under the action of a spring rod; the hinge rotating shaft is provided with a set of lock hook mechanism locking position at the initial position and the final position of the L-shaped sliding groove respectively. The mechanism is simple in form, the position change of the opening axis is completed before the aircraft cabin door is opened, and therefore interference between the cabin door and a peripheral structure in the opening process is avoided.

Description

Technical Field

[0001] The present invention belongs to the field of aircraft door mechanism design and relates to a variable axis hinge mechanism, and specifically to a variable axis hinge mechanism applied to an aircraft door, which completes the position change of the opening axis before the aircraft door is opened, thereby avoiding interference between the door and surrounding structures during the opening process. Background Art

[0002] At present, most of the non-blocking flip-up doors of aircraft are gooseneck hinges or piano-key hinges. Since the opening positions of some doors are in the complex curvature area of ​​the fuselage, or the outer surface of the fuselage skin is protected by a heat-insulating layer, etc., it is difficult to coordinate the axis position of the door opening mechanism with the fuselage structure, causing design difficulties. In order to solve the above problems, a variable axis hinge mechanism is designed. Through the motion mechanisms such as spring rods, sliders and lock hooks, it is easy to determine the axis of the opening mechanism under complex design requirements. The mechanism is simple, the number of parts is small, and the weight is light. It is suitable for being arranged on doors in the large curvature area of ​​the fuselage or the outer surface of the fuselage skin is protected by a heat-insulating layer. Summary of the invention

[0003] The present invention provides a variable axis hinge mechanism, which is composed of a spring rod, a slider, a lock hook and other motion mechanisms. Before the aircraft door is opened, the position change of the opening axis is completed first, thereby avoiding interference between the door and surrounding structures during the opening process.

[0004] The technical solution adopted by the present invention is as follows:

[0005] A variable axis hinge mechanism comprises a spring rod rotating shaft 1, a hinge support 2, a spring rod 3, a door rotating shaft 4, two sets of lock hook components, a straight bushing 12, and a limit bushing 13.

[0006] The hinge support 2 is fixedly connected to the fuselage frame structure, and the spring rod 3 is hinged to one end of the hinge support 2 through the spring rod rotating shaft 1. In order to prevent the spring rod 3 from moving along the rotation axis, a pair of limit bushings 13 are arranged on both sides of the spring rod 3 on the spring rod rotating shaft 1; L-shaped slide grooves are symmetrically arranged on the two side walls of the hinge support 2 near the other end; the other end of the spring rod 3 is hinged to the door rotating shaft 4, and the two ends of the door rotating shaft 4 pass through the L-shaped slide grooves on both sides and can slide along the L-shaped slide grooves. The spring rod 3 is a compression spring, so that the door rotating shaft 4 always maintains a tendency to move toward the far end of the L-shaped slide groove. On the door rotating shaft 4, a pair of limit bushings 13 are also arranged on both sides of the spring rod 3, and a straight bushing 12 is arranged in the contact area between the door rotating shaft 4 and the L-shaped slide groove to reduce friction.

[0007] The two groups of locking hook components are respectively arranged at the initial position and the end position of the L-shaped slide groove, respectively realizing the locking of the door shaft 4 in the open position and the closed position.

[0008] The closing position lock hook assembly includes a closing position torsion spring 5, a closing position lock hook 6, and a closing position lock hook shaft 7; the closing position lock hook shaft 7 is hingedly connected to the end of the L-shaped slide groove in the middle of the two side walls of the hinge support 2; the middle of the closing position lock hook 6 is fixedly connected to the end of the closing position lock hook shaft 7, and its lock hook end extends to the end of the L-shaped slide groove, and the other end is connected to the unlocking drive mechanism arranged in the door, and a closing position torsion spring 5 is arranged on the closing position lock hook shaft 7 to provide a locking force for the closing position lock hook 6. When the door is in a closed state, the door shaft 4 is locked under the hook lock of the closing position lock hook 6. The outer shape of the lock hook end of the closing position lock hook 6 is set to an arc shape to realize self-driven locking, and the closing position is unlocked by operating the unlocking drive mechanism to rotate the closing position lock hook 6.

[0009] The open position lock hook assembly includes an open position lock hook 8, an open position torsion spring 9, an open position lock hook shaft 10, and an open position lock hook limit 11; the open position lock hook shaft 10 passes through and is hinged at the other end of the hinge support 2; the middle part of the open position lock hook 8 is fixedly connected to the end of the open position lock hook shaft 10, and its lock hook end extends to the end of the L-shaped slide groove, and an open position torsion spring 9 is arranged on the open position lock hook shaft 10 to provide locking force for the open position lock hook 8. After the door is opened, the door shaft 4 is locked under the hook lock of the open position lock hook 8, and an open position lock hook limit 11 is fixed on the hinge support 2 on one side of the locking direction of the open position lock hook 8, which is used to limit the open position lock hook 8; the outer shape of the lock hook end of the open position lock hook 8 is set to an arc shape to realize self-driven locking, and the other end of the open position lock hook 8 is operated to rotate it to realize unlocking in the open position.

[0010] The beneficial effects of the present invention are:

[0011] 1. The mechanism is simple and efficient. The present invention solves the design difficulties such as the difficulty in coordinating the axis position of the door opening mechanism with the fuselage structure and the difficulty in controlling the weight when the door opening is located in a region with complex fuselage curvature or when the fuselage skin outer surface is protected by a heat insulation layer;

[0012] 2. Wide application range. The mechanism movement form of the present invention is simple, the designability is strong, and it can meet the adjustment and optimization of various spaces. The present invention can be applied to various mouth covers.

[0013] 3. High reliability. The mechanism has a reliable movement range and can reliably lock the door axis in the closed or open position. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is an axonometric view of a variable axis hinge mechanism.

[0015] Figure 2 The figure is a schematic diagram of the open position locking of a variable axis hinge mechanism.

[0016] Figure 3The figure is a schematic diagram of locking the open position of a variable axis hinge mechanism.

[0017] Figure 4 The figure is a schematic diagram of locking the closed position of a variable axis hinge mechanism.

[0018] In the figure: 1 spring rod shaft; 2 hinge support; 3 spring rod; 4 door shaft; 5 closed position torsion spring; 6 closed position lock hook; 7 closed position lock hook shaft; 8 open position lock hook; 9 open position torsion spring; 10 open position lock hook shaft; 11 open position lock hook limit; 12 straight bushing; 13 limit bushing. DETAILED DESCRIPTION

[0019] The technical solution of the present invention is described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. All other embodiments improved or adjusted by ordinary technicians in this field based on the embodiments of the present invention belong to the protection scope of the present invention.

[0020] like Figure 1 As shown, a variable axis hinge mechanism includes a spring rod shaft 1, a hinge support 2, a spring rod 3, a door shaft 4, a closed position torsion spring 5, a closed position lock hook 6, a closed position lock hook shaft 7, an open position lock hook 8, an open position torsion spring 9, an open position lock hook shaft 10, an open position lock hook limit 11, a straight bushing 12, and a limit bushing 13.

[0021] The hinge support 2 is fixedly connected to the fuselage frame structure, and the spring rod 3 is hinged to one end of the hinge support 2 through the spring rod rotating shaft 1. In order to prevent the spring rod 3 from moving along the rotation axis, a pair of limit bushings 13 are arranged on both sides of the spring rod 3 on the spring rod rotating shaft 1; L-shaped slide grooves are symmetrically arranged on the two side walls of the hinge support 2 near the other end; the other end of the spring rod 3 is hinged to the door rotating shaft 4, and the two ends of the door rotating shaft 4 pass through the L-shaped slide grooves on both sides and can slide along the L-shaped slide grooves. The spring rod 3 is a compression spring, so that the door rotating shaft 4 always maintains a tendency to move toward the far end of the L-shaped slide groove. On the door rotating shaft 4, a pair of limit bushings 13 are also arranged on both sides of the spring rod 3, and a straight bushing 12 is arranged in the contact area between the door rotating shaft 4 and the L-shaped slide groove to reduce friction.

[0022] Next to the end of the L-shaped slide groove in the middle of the two side walls of the hinge support 2, a closed position lock hook shaft 7 is hingedly penetrated; the middle of the closed position lock hook 6 is fixedly connected to the end of the closed position lock hook shaft 7, and its lock hook end extends to the end of the L-shaped slide groove, and the other end is connected to the unlocking drive mechanism arranged in the door, and a closed position torsion spring 5 is provided on the closed position lock hook shaft 7 to provide a locking force for the closed position lock hook 6. When the door is in a closed state, the door shaft 4 is locked under the hook lock of the closed position lock hook 6. The outer shape of the lock hook end of the closed position lock hook 6 is set to an arc shape to achieve self-driven locking, and the closed position is unlocked by operating the unlocking drive mechanism to rotate the closed position lock hook 6.

[0023] The open position lock hook shaft 10 passes through and is hinged at the other end of the hinge support 2; the middle part of the open position lock hook 8 is fixedly connected to the end of the open position lock hook shaft 10, and its lock hook end extends to the end of the L-shaped slide groove, and an open position torsion spring 9 is arranged on the open position lock hook shaft 10 to provide a locking force for the open position lock hook 8. After the door is opened, the door shaft 4 is locked under the hook lock of the open position lock hook 8, and an open position lock hook limit 11 is fixed on the hinge support 2 on one side of the locking direction of the open position lock hook 8, which is used to limit the open position lock hook 8; the outer shape of the lock hook end of the open position lock hook 8 is set to an arc shape to realize self-driven locking, and the other end of the open position lock hook 8 is operated to rotate it to realize open position unlocking.

[0024] The use process is as follows: during the door closing process, the door shaft 4 is operated to compress the spring rod 3 and move to the closed position until the straight bushing 12 contacts the closed position lock hook 6. Figure 4 As shown, the outer surface of the closed position lock hook 6 causes the force at the contact position to drive the closed position lock hook 6 to rotate and open, and the straight sleeve 12 and the closed position lock hook 6 move relative to each other along the arc of the outer surface of the closed position lock hook 6 until the closed position lock hook 6 rotates a certain angle and the straight sleeve 12 slides into the lock hook to complete the locking. Figure 1 As shown; the unlocking drive mechanism is operated to rotate the closed position lock hook 6 to unlock the closed position, open the hatch door, and the door shaft 4 slides along the L-shaped slide groove to the open position under the spring force of the spring rod 3 to achieve variable axis movement; when the door shaft 4 moves from the closed position to the open position, the straight sleeve 12 first contacts the outer surface of the open position lock hook 8, such as Figure 3 As shown, the outer surface of the lock hook 8 in the open position causes the force at the contact position to drive the lock hook 8 in the open position to rotate and open, and the straight sleeve 12 and the lock hook 8 in the open position move relative to each other along the arc of the outer surface of the lock hook 8 in the open position, until the lock hook 8 in the open position rotates a certain angle and the straight sleeve 12 slides into the lock hook to complete the locking. Figure 2 As shown; operate the other end of the open position lock hook 8 to rotate it to achieve unlocking of the open position.

[0025] The above-described embodiments merely express the implementation methods of the present invention, but they should not be understood as limiting the scope of the present invention. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A variable axis hinge mechanism, characterized in that: The variable axis hinge mechanism comprises a spring rod rotating shaft (1), a hinge support (2), a spring rod (3), a door rotating shaft (4), and two sets of lock hook components; The hinge support (2) is fixedly connected to the body frame structure, and the spring rod (3) is hinged to one end of the hinge support (2) through the spring rod rotating shaft (1); L-shaped sliding grooves are symmetrically arranged on the two side walls of the hinge support (2) near the other end; the other end of the spring rod (3) is hinged to the door rotating shaft (4), and the two ends of the door rotating shaft (4) pass through the L-shaped sliding grooves on both sides and can slide along the L-shaped sliding grooves. The spring rod (3) is a compression spring, so that the door rotating shaft (4) always maintains a tendency to move toward the far end of the L-shaped sliding groove; the two sets of lock hook components are respectively arranged at the initial position and the end position of the L-shaped sliding groove, respectively realizing the locking of the door rotating shaft (4) in the open position and the closed position.

2. The variable axis hinge mechanism according to claim 1, characterized in that: The structures of the two sets of locking hook components are: The closing position lock hook assembly comprises a closing position torsion spring (5), a closing position lock hook (6), and a closing position lock hook rotating shaft (7); a closing position lock hook rotating shaft (7) is hingedly connected to the end of the L-shaped slide groove in the middle of the two side walls of the hinge support (2); the middle of the closing position lock hook (6) is fixedly connected to the end of the closing position lock hook rotating shaft (7), and its lock hook end extends to the end of the L-shaped slide groove, and the other end is connected to the unlocking drive mechanism arranged in the door. A closing position torsion spring (5) is arranged on the closing position lock hook rotating shaft (7) to provide a locking force for the closing position lock hook (6). When the door is in a closed state, the door rotating shaft (4) is locked under the hook lock of the closing position lock hook (6). The outer shape of the lock hook end of the closing position lock hook (6) is set to an arc shape to realize self-driven locking. The closing position is unlocked by operating the unlocking drive mechanism to rotate the closing position lock hook (6); The open position lock hook assembly comprises an open position lock hook (8), an open position torsion spring (9), and an open position lock hook rotating shaft (10); the open position lock hook rotating shaft (10) passes through and is hinged at the other end of the hinge support (2); the middle part of the open position lock hook (8) is fixedly connected to the end of the open position lock hook rotating shaft (10), and its lock hook end extends to the end of the L-shaped slide groove; the open position lock hook rotating shaft (10) is provided with an open position torsion spring (9) to provide a locking force for the open position lock hook (8); after the door is opened, the door rotating shaft (4) is locked under the hook lock of the open position lock hook (8); the outer shape of the lock hook end of the open position lock hook (8) is set to an arc shape to realize self-driven locking, and the other end of the open position lock hook (8) is operated to rotate it to realize unlocking in the open position.

3. The variable axis hinge mechanism according to claim 2, characterized in that: An open position lock hook limiter (11) is fixed on the hinge support (2) on one side of the locking direction of the open position lock hook (8) and is used for limiting the open position lock hook (8).

4. The variable axis hinge mechanism according to claim 1, characterized in that: Pairs of limiting bushings (13) are arranged on both sides of the spring rod (3) on the spring rod rotating shaft (1) and the door rotating shaft (4) to prevent the spring rod (3) from moving along the rotating shaft.

5. The variable axis hinge mechanism according to claim 1, characterized in that: A straight bushing (12) is arranged in the contact area between the door shaft (4) and the L-shaped slide groove on the hinge support (2) to reduce friction.

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