Double four-bar linkage door cover opening and closing mechanism, door cover device and opening and closing method

Abstract

The application provides a double four-bar linkage opening and closing mechanism of a hatch cover, a hatch cover device and an opening and closing method. A fixed support (5) is hingedly connected with one end of a connecting rod A (1) through a hinge point A (9) and hingedly connected with one end of a connecting rod B (2) through a hinge point B (10); a waist of the connecting rod A (1) is hingedly connected with one end of a connecting rod C (3) through a hinge point C (11), a waist of the connecting rod C (3) is hingedly connected with the other end of the connecting rod B (2) through a hinge point D (12), and the other end of the connecting rod C (3) is hingedly connected with a movable support (6) through a hinge point E (13); the other end of the connecting rod A (1) is hingedly connected with one end of a connecting rod assembly D (4) through a hinge point F (14), and the other end of the connecting rod assembly D (4) is hingedly connected with the movable support (6) through a hinge point G (15); and the connecting lines of the hinge points A, B, D and C are a parallelogram in sequence. The application has the function of realizing a larger opening angle of the hatch cover in a limited movement space, and the opening angle is adjustable, the mechanism is simple, light in weight and high in reliability.

Description

Technical Field

[0001] This invention belongs to the field of aircraft mechanism design technology, specifically relating to a double four-bar linkage opening and closing mechanism for a canopy, a canopy device, and an opening and closing method. Background Technology

[0002] Aircraft hatches are a common structural element in aircraft, and different hatches are designed for various purposes to meet diverse needs. Hatches that are frequently opened require a specific opening and closing mechanism. Currently, gooseneck hinge arms are commonly used to connect the hatch and the frame, with the hatch rotating around a fixed axis. This design requires zero interference within the entire rotational sector of the gooseneck hinge arm. The presence of other components within this rotational sector will severely affect the hatch's opening angle. Summary of the Invention

[0003] The present invention aims to provide a double four-bar linkage opening and closing mechanism, a lid device, and an opening and closing method. The opening angle of this invention is adjustable, and the mechanism is simple, lightweight, and highly reliable.

[0004] Technical Solution. A double four-bar linkage opening and closing mechanism for a cover includes a fixed support, which is hinged to one end of a connecting rod A via hinge point A and to one end of a connecting rod B via hinge point B; the waist of connecting rod A is hinged to one end of connecting rod C via hinge point C, the waist of connecting rod C is hinged to the other end of connecting rod B via hinge point D, and the other end of connecting rod C is hinged to a movable support via hinge point E; the other end of connecting rod A is hinged to one end of a connecting rod assembly D via hinge point F, and the other end of connecting rod assembly D is hinged to the movable support via hinge point G; the lines connecting hinge points A, B, D, and C in sequence form a parallelogram.

[0005] In the aforementioned double four-bar linkage opening and closing mechanism, the linkage assembly D can extend / retract along the axial direction.

[0006] In the aforementioned double four-bar linkage opening and closing mechanism, the linkage assembly D includes a connecting rod DA and a connecting rod DB. The connecting rod DA and the connecting rod DB are connected by a thread. The length of the linkage assembly D is controlled by the depth of the thread, and it is fixed by a nut and a stop washer. The end of the connecting rod DA is hinged to the other end of the connecting rod A via hinge point F. The end of the connecting rod DB is hinged to the movable support via hinge point G.

[0007] In the aforementioned double four-bar linkage opening and closing mechanism, the other end of the linkage A is provided with one or more hinge holes along its length direction, and the connection point between one end of the linkage assembly D and the corresponding hinge hole is used as the hinge point F.

[0008] A mouth cover device based on the aforementioned double four-bar linkage mouth cover opening and closing mechanism includes a body, with the mouth frame on the body covered by the mouth cover; the inner wall of the body is connected to a fixed support, and the inner wall of the mouth cover near the edge is connected to a movable support.

[0009] A method for opening and closing a cover device as described above, wherein a parallelogram mechanism consisting of a fixed support and connecting rods A, B, and C, and a quadrilateral mechanism consisting of connecting rod A, connecting rod C, connecting rod assembly D, and a movable support, are linked to open or close the cover.

[0010] In the aforementioned method for opening and closing the cover device, one end of the adjusting linkage assembly D is hinged to a corresponding hinge hole, which can adjust the opening angle of the cover.

[0011] In the aforementioned method for opening and closing the cover device, the length of the connecting rod assembly D can adjust the opening angle of the cover.

[0012] Advantages of the present invention: The opening angle of the cover of the present invention is adjustable, and the opening and closing mechanism is located at the edge of the cover. When the cover is open, it will not obstruct the frame on the machine body, thus facilitating operation and maintenance.

[0013] The opening and closing mechanism of the present invention has the function of achieving a large opening angle of the lid within a limited movement space. The mechanism is simple, lightweight and highly reliable. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the mechanism in its closed state; Figure 2 A schematic diagram of the mechanism in its open state. Detailed Implementation

[0015] To better understand the function and purpose of the present invention, and not to be regarded as a limiting solution, the following detailed description of the embodiments of the present invention is given based on the accompanying drawings.

[0016] Example 1. A double four-bar linkage cover opening and closing mechanism, see [link to example]. Figures 1-2 It includes a fixed support 5, which is hinged to one end of connecting rod A1 via hinge point A9 and to one end of connecting rod B2 via hinge point B10; the waist of connecting rod A1 is hinged to one end of connecting rod C3 via hinge point C11, the waist of connecting rod C3 is hinged to the other end of connecting rod B2 via hinge point D12, and the other end of connecting rod C3 is hinged to a movable support 6 via hinge point E13; the other end of connecting rod A1 is hinged to one end of connecting rod assembly D4 via hinge point F14, and the other end of connecting rod assembly D4 is hinged to the movable support 6 via hinge point G15; the line connecting hinge points A, B, D, and C in sequence forms a parallelogram.

[0017] The aforementioned connecting rod assembly D4 can extend / retract axially. Specifically, the connecting rod assembly D4 includes connecting rod DA7 and connecting rod DB8, which are connected by threads. The length of the connecting rod assembly D4 is controlled by the depth of thread tightening and it is fixed by nuts and locking washers. The end of connecting rod DA7 is hinged to the other end of connecting rod A1 via hinge point F14. The end of connecting rod DB8 is hinged to movable support 6 via hinge point G15.

[0018] The other end of the aforementioned connecting rod A1 has one or more hinge holes along its length direction, and the connection point between one end of the connecting rod assembly D4 and the corresponding hinge hole is called hinge point F14.

[0019] The aforementioned double four-bar linkage opening and closing mechanism constitutes a cover device, including a body 16, with the mouth frame on the body 16 covered by a cover 17; the inner wall of the body 16 is connected to a fixed support 5, and the inner wall of the cover 17 is connected to a movable support 6 near the edge.

[0020] The aforementioned method for opening and closing the cover device involves first opening the locking mechanism of the cover, then pulling the cover. At this time, the parallelogram mechanism formed by the fixed support 5 and connecting rods A, B, and C, together with the quadrilateral mechanism formed by connecting rod A1, connecting rod C3, connecting rod assembly D4, and movable support 6, will open the cover 17. The same applies to closing.

[0021] One end of the isomorphic adjustment linkage assembly D4 is hinged to the corresponding hinge hole, which can adjust the opening angle of the cover 17.

[0022] The opening angle of the cover 17 can be adjusted by the length of the linkage assembly D4.

[0023] The opening and closing mechanism of this invention has the function of achieving a large opening angle of the lid within a limited movement space (the angle can reach about 59°, and the opening angle of the lid can be increased to about 80° by adjusting the hinge position between the connecting rod assembly D4 and the connecting rod A1. The conventional gooseneck hinge arm design has an opening angle of about 46°). The mechanism is simple, lightweight, and highly reliable.

[0024] This invention arranges a first quadrilateral mechanism (i.e., connecting rod A1, connecting rod B2, connecting rod C3, and fixed support 5) within the limited space between parts 18 and 19. This quadrilateral mechanism performs parallelogram motion, simultaneously causing the lid to perform parallelogram motion. Additionally, connecting rod A1, connecting rod C3, connecting rod assembly D4, and movable support 6 form a second quadrilateral mechanism. Connecting rod A1 and connecting rod C3 are shared rods for the two quadrilaterals. When the first quadrilateral mechanism moves, it drives the second quadrilateral mechanism to move via the shared rod. The movement of the second quadrilateral mechanism drives the lid to rotate around hinge point E13. Different rotation angles of the lid are achieved by controlling the assembly position and length of connecting rod assembly D4. The translation and rotation of the lid are realized through the double quadrilateral mechanism, and the superposition of these two motion effects ultimately achieves a larger opening angle.

[0025] Among them, the smaller the distance between hinge point E13 and the edge of the cover, the smaller the distance between hinge point E13 and hinge point G15, and the larger the distance between hinge point C11 and hinge point F14, the larger the opening angle of the cover.

[0026] The above-described embodiments merely illustrate the implementation methods of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the protection scope of the present invention.

Claims

1. A lid device based on a double four-bar linkage lid opening and closing mechanism, characterized in that, The fuselage includes a frame that is covered by a cover; the inner wall of the fuselage is connected to a fixed support, and the inner wall of the cover is connected to a movable support near the edge. The double four-bar linkage cover opening and closing mechanism includes a fixed support, which is hinged to one end of link A via hinge point A and to one end of link B via hinge point B; the waist of link A is hinged to one end of link C via hinge point C, the waist of link C is hinged to the other end of link B via hinge point D, and the other end of link C is hinged to a movable support via hinge point E; the other end of link A is hinged to one end of link assembly D via hinge point F, and the other end of link assembly D is hinged to the movable support via hinge point G. The lines connecting hinge points A, B, D, and C in sequence form a parallelogram; Linkage assembly D can extend / retract axially; The linkage assembly D includes linkage DA and linkage DB. Linkage DA and linkage DB are connected by threads. The length of linkage assembly D is controlled by the depth of threading and it is fixed by nuts and locking washers. The end of linkage DA is hinged to the other end of linkage A via hinge point F. The end of linkage DB is hinged to the movable support via hinge point G. One or more hinge holes are provided at the other end of the connecting rod A along its length direction, and the connection point between one end of the connecting rod assembly D and the corresponding hinge hole is called the hinge point F.

2. A method for opening and closing the lid device as described in claim 1, characterized in that, The parallelogram mechanism consisting of the fixed support and connecting rods A, B, and C, in conjunction with the quadrilateral mechanism consisting of connecting rod A, connecting rod C, connecting rod assembly D, and the movable support, opens or closes the cover.

3. The method for opening and closing the cover device according to claim 2, characterized in that, One end of the adjusting linkage assembly D is hinged to a corresponding hinge hole, which can adjust the opening angle of the cover.

4. The method for opening and closing the cover device according to claim 2, characterized in that, The length of the linkage assembly D allows for adjustment of the opening angle of the cover.

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