A hatch opening drive mechanism with clutch function

Abstract

The application relates to the field of aircraft cabin door mechanisms, in particular to a cabin door opening driving mechanism applied to an aircraft cabin door, provided with a closing state clutch function and capable of realizing efficient driving of the cabin door opening process. Through the design of a clutch device, the spring force of a gas spring assembly is not directly applied to the cabin door structure at the completely closed position of the cabin door, the cabin door is prevented from bearing the opening load at the closed position, the probability of accidental opening is reduced, and the safety of the cabin door is improved. Through automatic locking of the position of a Malta cam, direct locking connection of the gas spring and the cabin door during the cabin door opening process is realized, accidental events such as off-slotting are avoided, and the reliability of the mechanism is improved. The gas spring assembly is arranged at the side of the cabin door and directly drives the cabin door to open, compared with the scheme of arranging the gas spring assembly at the upper portion of the cabin door, the transmission arm of the mechanism is significantly increased, and the transmission efficiency of the mechanism has certain advantages.

Description

Technical Field

[0001] This application relates to the field of aircraft door mechanisms, specifically a door opening drive mechanism applied to aircraft doors, which has a clutch function in the closed state and can efficiently drive the door opening process. Background Technology

[0002] The function of the opening drive mechanism is to move the aircraft door from the closed position to the open position. Opening drive mechanisms typically employ gas springs, motors, or other drive devices. To improve door safety, the opening drive mechanism should not provide any force that would cause the door to open when it is fully closed. Common tilting door opening drive mechanisms are usually located near the door's opening rotation axis and achieve the design requirement of "not providing opening force when the door is closed" through an "over-center" design. This type of mechanism has a small opening drive arm, relatively low drive transmission efficiency, and often requires manual assistance during the initial opening phase, resulting in a low degree of automation in the opening process. Summary of the Invention

[0003] The technical problem to be solved by this application is to provide a hatch opening drive mechanism that has a clutch function in the closed state and can efficiently drive the hatch opening process.

[0004] To solve the above problems, the specific technical solution of this application is as follows:

[0005] A hatch opening drive mechanism includes a hatch structure 1, a door frame structure 2, a gas spring fixing rod 3, a gas spring telescopic rod 4, a guide pin 5, a hatch guide support 6, a Maltese cam 7, a limit rocker arm 8, a torsion spring 9, a hatch limit pin 10, a door frame guide support 11, a door frame limit pin 12, a gas spring support 13, an upper lock 14, a limit lock 15, and a hinge arm shaft 16.

[0006] The gas spring fixing rod 3 and the gas spring telescopic rod 4 constitute a gas spring assembly. The end of the gas spring fixing rod 3 is hinged to the gas spring support 13, which is fixedly connected to the door frame structure 2. The gas spring telescopic rod 4 is installed in the rod cavity structure of the gas spring fixing rod 3, allowing it to extend and retract along the gas spring fixing rod 3 and provide thrust. A guide pin 5, which is cylindrical, is fixedly connected to the end of the gas spring telescopic rod 4. The door frame guide support 11 is fixedly connected to the door frame structure 2, and the hatch guide support 6 is fixedly connected to the hatch structure 1. The slide rail groove of the door frame guide support 11 and the guide groove of the hatch guide support 6 are arranged correspondingly. Both the guide groove and the slide rail groove are approximately U-shaped groove structures with a flared opening at the end. In the closed position of the hatch, one end of the guide pin 5 is installed inside the slide rail groove of the door frame guide support 11. The angle between the axis of the gas spring assembly and the upper surface of the slide rail groove is greater than 95°. Under the action of the gas spring force, the guide pin 5 is pressed against the surface of the slide rail groove. The other end of the guide pin 5 is inserted into the cam groove of the Maltese cam 7. The guide pin 5 does not contact the guide groove of the hatch guide support 6. The Maltese cam 7 is hinged to the hatch structure 1 and driven to rotate by the hatch release handle. The Maltese cam 7 is fixedly connected to the upper lock 14. The limit rocker arm 8 is fixedly connected to the limit lock 15. The limit rocker arm 8 is hinged to the hatch structure 1. One end of the torsion spring 9 is pressed against the limit rocker arm 8 and the other end is pressed against the hatch limit pin 10. The hatch limit pin 10 is fixedly connected to the hatch structure 1. A door frame limit pin 12 is fixedly connected to the door frame structure 2. When the hatch is closed, the torsion spring 9 presses the limit rocker arm 8 against the surface of the door frame limit pin 12.

[0007] During the unlocking process of the hatch, the unlocking handle drives the Maltese cam 7 to rotate. The Maltese cam 7 drives the guide pin 5 to move along the slide rail groove of the door frame guide support 11. The guide pin 5 gradually disengages from the slide rail groove of the door frame guide support 11 and enters the guide groove of the hatch guide support 6. After the unlocking handle moves to the end position, the angle between the axis of the gas spring assembly and the upper end face of the guide groove is greater than 95°, and the guide pin 5 is pressed tightly against the guide groove surface of the hatch guide support 6 by the gas spring force. During the above process, the gas spring fixing rod 3 and the gas spring telescopic rod 4 move in a telescopic motion.

[0008] In the initial stage of hatch opening, hatch structure 1 rotates around hinge arm axis 16. The limiting rocker arm 8, under the action of torsion spring 9, remains pressed against the surface of door frame limiting pin 12. Simultaneously, the limiting rocker arm 8 rotates around its own axis of rotation until the locking limiting end face 17 of the limiting lock 15 contacts the hatch limiting pin 10. The locking end face 18 of the limiting lock 15 then moves into the closing path of the upper lock 14, hindering the rotational movement of the upper lock 14 and Malta cam 7. The locking end face 18 is an arc surface, its center passing through the rotation axis of the limiting lock 15. After the hatch is further opened, the limiting rocker arm 8 disengages from the door frame limiting pin 12.

[0009] This application has the following advantages:

[0010] 1. High safety. Through the clutch mechanism design, when the hatch is fully closed, the spring force of the gas spring assembly does not directly act on the hatch structure, avoiding the hatch from bearing the opening load in the closed position, reducing the probability of accidental opening, and improving hatch safety.

[0011] 2. High reliability. By automatically locking the position of the Maltese cam, a direct locking connection between the gas spring and the hatch is achieved during the hatch opening process, avoiding unexpected events such as disengagement and improving the reliability of the mechanism.

[0012] 3. High transmission efficiency. The gas spring assembly is located on the side of the hatch, directly driving the hatch to open. Compared with the scheme where it is located on the top of the hatch, the transmission arm of the mechanism is significantly larger, and the transmission efficiency of the mechanism has a certain advantage. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the right side of the cabin door in the closed state.

[0014] Figure 2 This is a schematic diagram of the left side of the cabin door in the closed state.

[0015] Figure 3 This is a partial detailed view of the hatch in the closed state.

[0016] Figure 4 This is a schematic diagram of the gas spring detaching from the door frame guide support (the door guide support is not shown).

[0017] Figure 5 This is a schematic diagram of the gas spring entry hatch guide support for this application.

[0018] Figure 6 This is a schematic diagram showing the initial open position of the hatch in this application.

[0019] Figure 7 This is a schematic diagram of the hatch in the fully open state of this application.

[0020] Figure 8 This is a schematic diagram of the limit lock component in this application.

[0021] Figure 9 This is a structural skeleton diagram of the guide support mechanism at the closing position of the door frame in this application.

[0022] Figure 10 This is a schematic diagram of the mechanism at the guide support of the latch-off / opening compartment door in this application.

[0023] 1. Door structure; 2. Door frame structure; 3. Gas spring fixing rod; 4. Gas spring telescopic rod; 5. Guide pin; 6. Door guide support; 7. Maltese cam; 8. Limiting rocker arm; 9. Torsion spring; 10. Door limiting pin; 11. Door frame guide support; 12. Door frame limiting pin; 13. Gas spring support; 14. Upper lock; 15. Limit lock; 16. Hinge arm shaft; 17. Locking limiting end face; 18. Locking end face. Detailed Implementation

[0024] The present application is described in detail below with reference to the embodiments, but the present application is not limited to these embodiments.

[0025] Example 1

[0026] like Figures 1 to 10 As shown, a hatch opening drive mechanism includes a hatch structure 1, a door frame structure 2, a gas spring fixing rod 3, a gas spring telescopic rod 4, a guide pin 5, a hatch guide support 6, a Maltese cam 7, a limiting rocker arm 8, a torsion spring 9, a hatch limiting pin 10, a door frame guide support 11, a door frame limiting pin 12, a gas spring support 13, an upper lock 14, a limiting lock 15, and a hinge arm shaft 16. The gas spring fixing rod 3 and the gas spring telescopic rod 4 constitute a gas spring assembly. The end of the gas spring fixing rod 3 is hinged to the gas spring support 13, and the gas spring support 13 is fixedly connected to the door frame structure 2. The gas spring telescopic rod 4 is installed in the rod cavity structure of the gas spring fixing rod 3 and can move along the gas spring fixing rod 3 to provide thrust. The end of the gas spring telescopic rod 4 is fixedly connected to a guide pin 5, which is a cylindrical structure. The door frame guide support 11 is fixedly connected to the door frame structure 2, and the hatch guide support 6 is fixedly connected to the hatch structure 1. The slide rail groove of the door frame guide support 11 and the guide groove of the hatch guide support 6 are arranged correspondingly. Both the guide groove and the slide rail groove are approximately U-shaped groove structures with a flared opening at the end of the groove. In the closed position of the hatch, one end of the guide pin 5 is installed inside the slide rail groove of the door frame guide support 11. The angle between the axis of the gas spring assembly and the upper end face of the slide rail groove is greater than 95°. Under the action of the gas spring force, the guide pin 5 is pressed against the surface of the slide rail groove. The other end of the guide pin 5 is installed inside the cam groove of the Maltese cam 7. The guide pin 5 does not contact the guide groove of the hatch guide support 6. Maltese cam 7 is hinged to hatch structure 1 and driven to rotate by hatch latch handle. Maltese cam 7 is fixedly connected to upper lock 14. Limit rocker arm 8 is fixedly connected to limit lock 15. Limit rocker arm 8 is hinged to hatch structure 1. One end of torsion spring 9 is pressed against limit rocker arm 8 and the other end is pressed against hatch limit pin 10. Hatch limit pin 10 is fixedly connected to hatch structure 1. Hatch limit pin 12 is fixedly connected to door frame structure 2. In the hatch closed position, torsion spring 9 presses limit rocker arm 8 against the surface of door frame limit pin 12.

[0027] During the unlocking process of the hatch, the unlocking handle drives the Maltese cam 7 to rotate. The Maltese cam 7 drives the guide pin 5 to move along the slide rail groove of the door frame guide support 11. The guide pin 5 gradually disengages from the slide rail groove of the door frame guide support 11 and enters the guide groove of the hatch guide support 6. After the unlocking handle moves to the end position, the angle between the axis of the gas spring assembly and the upper end face of the guide groove is greater than 95°, and the guide pin 5 is pressed tightly against the guide groove surface of the hatch guide support 6 by the gas spring force. During the above process, the gas spring fixing rod 3 and the gas spring telescopic rod 4 move in a telescopic motion.

[0028] In the initial stage of hatch opening, hatch structure 1 rotates around hinge arm axis 16. The limiting rocker arm 8, under the action of torsion spring 9, remains pressed against the surface of door frame limiting pin 12. Simultaneously, the limiting rocker arm 8 rotates around its own axis of rotation until the locking limiting end face 17 of the limiting lock 15 contacts the hatch limiting pin 10. The locking end face 18 of the limiting lock 15 then moves into the closing path of the upper lock 14, hindering the rotational movement of the upper lock 14 and Malta cam 7. The locking end face 18 is an arc surface, its center passing through the rotation axis of the limiting lock 15. After the hatch is further opened, the limiting rocker arm 8 disengages from the door frame limiting pin 12.

[0029] Work process:

[0030] Door opening process: The Maltese cam 7 is driven to rotate by the latch release handle. The Maltese cam 7 drives the guide pin 5 to move along the slide rail groove of the door frame guide support 11, and gradually moves away from the slide rail groove and into the guide groove of the hatch guide support 6. During this process, the gas spring assembly rotates along the hinge axis between the gas spring fixed rod 3 and the gas spring support 13. The gas spring telescopic rod 4 moves in extension and retraction relative to the gas spring fixed rod 3. After the Maltese cam 7 rotates to the end position and the hatch is latched, the gas spring assembly drives the hatch to flip open. In the initial stage of opening, the limiting rocker arm 8 moves with the hatch flip and gradually moves away from the door frame limiting pin 12. The limiting rocker arm 8 rotates under the action of the torsion spring 9 and remains in contact with the door frame limiting pin 12. As the hatch opening angle increases further, the locking limit end face 17 of the limit lock 15 contacts the hatch limit pin 10, the limit rocker arm 8 disengages from the door frame limit pin 12, and the locking end face 18 of the limit lock 15 moves into the closing path of the upper lock 14, obstructing the rotation of the upper lock 14 and the Malta cam 7. The position of the Malta cam 7 is locked at the same time, and the guide pin 5 is locked inside the hatch guide support 6 by the Malta cam 7, preventing the guide pin 5 from accidentally disengaging during the process of the gas spring assembly driving the hatch to open.

[0031] The closing process is the reverse of the opening process.

[0032] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any modifications or substitutions made by those skilled in the art within the scope of the technology disclosed in this application should be covered 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 opening drive mechanism with a clutch function, characterized in that, Includes hatch structure (1), door frame structure (2), gas spring fixing rod (3), gas spring telescopic rod (4), guide pin (5), hatch guide support (6), Maltese cam (7), limit rocker arm (8), torsion spring (9), hatch limit pin (10), door frame guide support (11), door frame limit pin (12), gas spring support (13), upper lock (14), limit lock (15) and hinge arm shaft (16); The gas spring fixing rod (3) and the gas spring telescopic rod (4) constitute a gas spring assembly. The end of the gas spring fixing rod (3) is hinged to the gas spring support (13). The gas spring support (13) is fixedly connected to the door frame structure (2). The gas spring telescopic rod (4) is installed in the rod cavity structure of the gas spring fixing rod (3) and can move along the gas spring fixing rod (3) to provide thrust. The end of the gas spring telescopic rod (4) is fixedly connected to a guide pin (5), which is a cylindrical structure. The door frame guide support (11) is fixedly connected to the door frame structure (2), and the hatch guide support (6) is fixedly connected to the hatch structure (1). The slide rail groove of the door frame guide support (11) and the guide groove of the hatch guide support (6) are arranged accordingly. The guide groove and the slide rail groove are both approximately U-shaped groove structures with a flared mouth design at the end of the groove.

2. The hatch opening drive mechanism with clutch function according to claim 1, characterized in that, In the closed position of the hatch, one end of the guide pin (5) is installed inside the slide rail groove of the door frame guide support (11), and the angle between the axis of the gas spring assembly and the upper end face of the slide rail groove is greater than 95°. Under the action of the gas spring force, the guide pin (5) is pressed against the surface of the slide rail groove. The other end of the guide pin (5) is inserted into the cam groove of the Maltese cam (7), and the guide pin (5) does not contact the guide groove of the hatch guide support (6); The Maltese cam (7) is hinged to the hatch structure (1) and driven to rotate by the hatch latch handle. The Maltese cam (7) is fixedly connected to the upper lock (14). The limiting rocker arm (8) is fixedly connected to the limiting lock (15). The limiting rocker arm (8) is hinged to the hatch structure (1). One end of the torsion spring (9) is pressed against the limiting rocker arm (8) and the other end is pressed against the hatch limiting pin (10). The hatch limiting pin (10) is fixedly connected to the hatch structure (1). A door frame limiting pin (12) is fixedly connected to the door frame structure (2). When the hatch is closed, the torsion spring (9) presses the limiting rocker arm (8) against the surface of the door frame limiting pin (12).

3. The hatch opening drive mechanism with clutch function according to claim 2, characterized in that, During the unlocking process of the hatch, the unlocking handle drives the Maltese cam (7) to rotate, and the Maltese cam (7) drives the guide pin (5) to move along the slide rail groove of the door frame guide support (11). The guide pin (5) gradually disengages from the slide rail groove of the door frame guide support (11) and enters the guide groove of the hatch guide support (6). After the unlocking handle moves to the end position, the angle between the axis of the gas spring assembly and the upper end face of the guide groove is greater than 95°, and the guide pin (5) is pressed by the gas spring force onto the guide groove surface of the hatch guide support (6). During the unlocking process of the hatch, the gas spring fixing rod (3) and the gas spring telescopic rod (4) move in a telescopic motion.

4. The hatch opening drive mechanism with clutch function according to claim 3, characterized in that, In the initial stage of hatch opening, hatch structure (1) rotates around hinge arm axis (16), and limit rocker arm (8) is pressed against the surface of door frame limit pin (12) under the action of torsion spring (9). At the same time, limit rocker arm (8) rotates around its own rotation axis until the upper locking limit end face 17 of limit lock (15) contacts hatch limit pin (10). The locking end face 18 of limit lock (15) moves into the closing path of upper lock (14), hindering the rotation of upper lock (14) and Malta cam (7). The locking end face 18 is an arc surface, and its center passes through the rotation axis of limit lock (15). After the hatch is further opened, limit rocker arm (8) disengages from door frame limit pin (12).

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