Slat blanking cap movement mechanism

Abstract

The invention provides a slat blanking cap movement mechanism, and belongs to the field of aircraft structures, the movement mechanism comprises a blanking cap upper skin and a blanking cap lower skin which are hinged to each other; one end of the upper supporting connecting rod is hinged to the wing fixing structure, and the other end is hinged to the blanking cap upper skin; one ends of the middle supporting connecting rod and the lower supporting connecting rod are hinged to the connecting plate, the other ends of the middle supporting connecting rod and the lower supporting connecting rod are hinged to the blanking cap upper skin, a hinged rotating shaft of the middle supporting connecting rod and a hinged rotating shaft of the upper supporting connecting rod are coaxial, and a hinged rotating shaft of the lower supporting connecting rod and a hinged rotating shaft of the upper supporting connecting rod are arranged in parallel; an upper rotating shaft and a lower rotating shaft are arranged between the two connecting plates; one end of the rotating connecting rod is hinged to the upper rotating shaft, and the other end is hinged to the blanking cap lower skin; the sliding rail is fixed on the lower rotating shaft; and the driving mechanism is matched with the sliding rail and can drive the connecting plate to rotate around the lower rotating shaft, so that the middle supporting connecting rod, the lower supporting connecting rod and the rotating connecting rod are driven to move, and retraction and release of the blanking cap upper skin and the blanking cap lower skin are achieved.

Description

Technical Field

[0001] The present application belongs to the field of aircraft slat structure design, and in particular relates to a slat cover motion mechanism. Background Art

[0002] During the takeoff and landing process of large transport aircraft, the slats are often deflected downward to increase lift / drag. The main principle is to change the position of the critical point of the wing by adjusting the slats, thereby changing the airflow distribution state on the wing surface, so that the aircraft can fly at a larger angle of attack. However, when the angle of the slat downward deflection is large, the slat will interfere with the engine nacelle suspension. At this time, a part of the slat skin can be cut off to ensure that the slat can continue to deflect downward, allowing the aircraft to obtain a larger angle of attack. For this part of the cut skin, it is necessary to design a slat cover mechanism to ensure that it avoids interference with the slat when it is lowered, and the aerodynamic continuity of the slat leading edge when the slat is retracted. Therefore, the slat cover is an important mechanism for large transport aircraft to ensure the aerodynamic continuity of the slat leading edge.

[0003] In the prior art, a follow-up mechanism is usually designed using the slat motion trajectory to realize the opening and closing process of the slat cover. The existing slat cover motion mechanism consists of a swing cam mechanism and a four-bar mechanism, with fewer moving components and a simple structure. This mechanism is suitable for situations where the slat is interrupted less by the engine nacelle suspension, the cover is small in size and the space above the engine nacelle suspension is large, and the cover can be deflected forward and downward. However, for situations where the slat is interrupted more by the engine nacelle suspension, the cover is large in size and the space above the engine nacelle suspension is small. The small space cannot accommodate the large cover, and the existing cover mechanism will not be applicable. Summary of the invention

[0004] The purpose of the present application is to provide a slat blocking cover movement mechanism to solve or alleviate at least one problem in the background technology.

[0005] The technical solution of the present application is: a slat cover movement mechanism, comprising:

[0006] An upper cover skin and a lower cover skin hinged to each other;

[0007] One end of the upper supporting link is hinged to the wing fixed structure and the other end is hinged to the upper skin of the plug cover;

[0008] A middle support link having one end hinged on the connecting plate and the other end hinged on the upper skin of the plug cover, wherein the hinge axis of the middle support link is coaxial with the hinge axis of the upper support link;

[0009] One end of the lower supporting link is hinged to the connecting plate and the other end is hinged to the upper skin of the plug cover, wherein the hinge axis of the lower supporting link is arranged parallel to the hinge axis of the upper supporting link;

[0010] Two parallel connecting plates, with an upper rotating shaft and a lower rotating shaft arranged between the connecting plates;

[0011] A rotating connecting rod with one end hinged on the upper rotating shaft and the other end hinged on the lower skin of the plug cover;

[0012] A slide rail fixed on the lower rotating shaft;

[0013] The driving mechanism cooperates with the slide rail to drive the connecting plate to rotate around the lower rotating shaft, thereby driving the middle supporting connecting rod, the lower supporting connecting rod and the rotating connecting rod to move, and finally realizing the retraction and extension of the upper skin and the lower skin of the blocking cover.

[0014] In an optional embodiment of the present application, the upper skin of the plugging cover and the lower skin of the plugging cover are connected by a hinge.

[0015] In an optional implementation manner of the present application, the upper supporting link, the middle supporting link and the lower supporting link are all parallelogram structures.

[0016] In an optional embodiment of the present application, a reinforcing rod is provided on the diagonal of the upper support link to improve the structural strength of the upper support link.

[0017] In an optional implementation manner of the present application, the rotating connecting rod is a single-rod structure.

[0018] In an optional implementation manner of the present application, the connecting plate is a quadrilateral structure, and the four vertices of the quadrilateral structure respectively constitute the hinge points of the middle supporting link and the lower supporting link and the rotation points of the upper rotating shaft and the lower rotating shaft.

[0019] In an optional implementation manner of the present application, the hinge points of the middle supporting link and the lower supporting link are located on the diagonal line of the quadrilateral, and the pivot points of the upper rotating shaft and the lower rotating shaft are located on another diagonal line of the quadrilateral.

[0020] In an optional embodiment of the present application, the connecting plate is hingedly mounted on the wing fixed structure via a connecting plate support, and the connecting plate and the connecting plate support are connected via a lower rotating shaft.

[0021] In an optional implementation manner of the present application, a curved slide groove is provided on the slide rail, and a protrusion is provided at the end of the driving mechanism, and the protrusion cooperates with the slide groove to realize the rotation of the lower rotating shaft.

[0022] In an optional embodiment of the present application, the above-mentioned driving mechanism is a linear displacement actuator.

[0023] The slat cover movement mechanism provided in the present application is a connecting rod driven structure as a whole. Through the cooperation of the slide rail and the protrusion, only linear motion needs to be input to drive the entire slat cover movement mechanism to complete the retraction and extension action. The structure is simple and easy to implement. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solution provided by the present application, the following is a brief introduction to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the present application.

[0025] Figure 1 This is a schematic diagram of the slat cover movement mechanism of the present application.

[0026] Figure 2 This is an enlarged view of the layout of the slat cover movement mechanism of the present application.

[0027] Figure 3 It is a schematic diagram of the slat cover movement mechanism of the present application from the expanded state to the retracted state.

[0028] Figure 4 This is a schematic diagram of the slat cover movement mechanism of the present application being retracted to an expanded state. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solutions and advantages of the implementation of this application clearer, the technical solutions in the embodiments of this application will be described in more detail below in conjunction with the drawings in the embodiments of this application.

[0030] The purpose of the present application is to provide a slat cover movement mechanism, so that when the slat is deflected downward, it can be folded and hidden inside the skin to avoid interference between the cover and the slat, and when the slat is folded, it can be unfolded to ensure the aerodynamic continuity of the leading edge of the slat, and the movement trajectory is not restricted by the movement of the slat. It can be suitable for occasions where the slat is interrupted to a large extent by the nacelle suspension.

[0031] like Figure 1 and Figure 2 As shown, the new type of slat cover movement mechanism 10 provided in the present application includes a cover upper skin 11, a cover lower skin 12, an upper support link 21, a middle support link 22, a lower support link 23, a rotating link 24, a connecting plate 30, an upper rotating shaft 41, a lower rotating shaft 42, a slide rail 50 and a driving mechanism 60.

[0032] The upper cover skin 11 and the lower cover skin 12 of the plug cover are connected as a whole by a hinge, and the upper cover skin 11 and the lower cover skin 12 of the plug cover can rotate relative to the hinge. In some embodiments of the present application, the shapes of the upper cover skin 11 and the lower cover skin 12 of the plug cover match the profile of the leading edge of the slat. Further, the upper cover skin 11 and the lower cover skin 12 of the plug cover are made of the same material as the leading edge of the slat, for example, they can be made of aluminum alloy or composite materials.

[0033] One end of the upper support link 21 and the middle support link 22 are hinged on the upper skin 11 of the plug cover, and the two are coaxially arranged at the hinge axis on the upper skin 11 of the plug cover. The other end of the upper support link 21 is hinged to the link support fixed on the wing fixed structure, and the other end of the middle support link 22 is hinged to the connecting plate 30.

[0034] One end of the lower supporting link 23 is hinged on the upper skin 11 of the plugging cover, and the other end is hinged on the connecting plate 30, wherein the hinge axis of the lower supporting link 23 and the upper skin 11 of the plugging cover and the hinge axis of the middle supporting link 22 and the upper skin 11 of the plugging cover are parallel and at a certain distance, thereby forming a rectangular or parallelogram hinge rotation plane on the upper skin 11 of the plugging cover.

[0035] In a preferred embodiment of the present application, the upper support link 21, the middle support link 2 and the lower support link 23 are all rectangular structures or parallelogram structures composed of multiple links, and one side of the rectangular structure or parallelogram structure of the upper support link 21 is hinged to the upper skin 11 of the plugging cover, and the other side is hinged to the fuselage structure; while the rectangular structure or parallelogram structure of the middle support link 22 and the lower support link 23 is hinged to the upper skin 11 of the plugging cover on one side, and the other side is hinged to the connecting plate 30.

[0036] Furthermore, in the present application, the diagonals of the rectangular structure or parallelogram structure of the upper support link 21 are provided with reinforcing rods, and the reinforcing rods connect the diagonals of the rectangular structure or parallelogram structure to improve the structural strength of the upper support link 21 .

[0037] There are two connecting plates 30, which are arranged in parallel and hinged to the connecting plate support fixed on the fuselage structure. An upper rotating shaft 41 and a lower rotating shaft 42 are connected between the two connecting plates 30, and the lower rotating shaft 42 is coaxially arranged on the hinge axis of the connecting plate 30 and the connecting plate support, and the upper rotating shaft 41 is arranged on the side of the connecting plate 30 away from the rotating shaft.

[0038] In some embodiments of the present application, the connecting plate 30 is a quadrilateral structure, in which three vertices are hinged to the connecting plate support, the middle support link 22, and the lower support link 23 respectively, and the other vertex is installed with the upper rotating shaft 41, and the upper rotating shaft 41 and the lower rotating shaft 42 are located at diagonal positions of the quadrilateral structure.

[0039] One end of the rotating link 24 is hinged on the upper rotating shaft 41, and the other end is hinged on the lower cover skin 12. In some embodiments of the present application, the rotating link 24 is a single-rod structure.

[0040] The slide rail 50 is installed on the lower rotating shaft 42, and the driving mechanism 60 cooperates with the slide rail 50. Through the driving mechanism 60, the slide rail 50 fixed on the lower rotating shaft 42 can rotate relative to the lower rotating shaft 42, thereby controlling the connecting plate 30 to move around the lower rotating shaft 42, and then driving the middle supporting link 22, the lower supporting link 23 and the rotating link 24 to move, thereby realizing the folding and unfolding of the blocking cover mechanism.

[0041] See also Figure 2 As shown, a curved slide groove 51 is provided on the slide rail 50, one end of which is fixedly connected to the lower rotating shaft 42. A radially extending protrusion 61 is provided at the end of the driving mechanism 60, and the protrusion 61 is placed in the slide groove 51 of the slide rail 50. When the driving mechanism 60 performs telescopic movement, the protrusion 61 can slide in the slide groove 51, and the protrusion 61 further squeezes the slide rail 50, so that the lower rotating shaft 42 fixedly connected to the slide rail 50 rotates.

[0042] In the preferred embodiment of the present application, the driving mechanism 60 is a linear displacement actuator, which is mounted on the fuselage structure through an articulated seat. The front end of the linear displacement actuator is provided with a protrusion 61, which is stuck in the slide groove 51, and the linear motion is input into the entire mechanism through the protrusion-slide groove.

[0043] like Figure 3 and Figure 4 The figure shows a schematic diagram of the movement process of the slat cover movement mechanism of the present application. In the deployed state, the linear displacement is inputted backward by the linear displacement actuator, and the connecting plate 30 will drive the middle support link 22, the lower support link 23 and the rotating link 24 to move downward, and the cover mechanism will change from the deployed state to the retracted state; in the retracted state, the linear displacement is inputted forward by the linear displacement actuator, and the connecting plate 30 will drive the middle support link 22, the lower support link 23 and the rotating link 24 to move upward, and the cover mechanism will change from the retracted state to the deployed state.

[0044] The slat cover movement mechanism provided in the present application is a connecting rod driven structure as a whole. Through the cooperation of the slide rail and the protrusion, only linear motion needs to be input to drive the entire slat cover movement mechanism to complete the retraction and extension action. The structure is simple and easy to implement.

[0045] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A slat cover movement mechanism, characterized in that: include: An upper cover skin and a lower cover skin hinged to each other; One end of the upper supporting link is hinged to the wing fixed structure and the other end is hinged to the upper skin of the plug cover; A middle support link having one end hinged on the connecting plate and the other end hinged on the upper skin of the plug cover, wherein the hinge axis of the middle support link is coaxial with the hinge axis of the upper support link; One end of the lower supporting link is hinged to the connecting plate and the other end is hinged to the upper skin of the plug cover, wherein the hinge axis of the lower supporting link is arranged parallel to the hinge axis of the upper supporting link; Two parallel connecting plates, with an upper rotating shaft and a lower rotating shaft arranged between the connecting plates; A rotating connecting rod with one end hinged on the upper rotating shaft and the other end hinged on the lower skin of the plug cover; A slide rail fixed on the lower rotating shaft; The driving mechanism cooperates with the slide rail to drive the connecting plate to rotate around the lower rotating shaft, thereby driving the middle supporting connecting rod, the lower supporting connecting rod and the rotating connecting rod to move, and finally realizing the retraction and extension of the upper skin and the lower skin of the blocking cover.

2. The slat cover movement mechanism according to claim 1, characterized in that: The upper skin of the plugging cover and the lower skin of the plugging cover are connected by a hinge.

3. The slat cover movement mechanism according to claim 1, characterized in that: The upper supporting link, the middle supporting link and the lower supporting link are all parallelogram structures.

4. The slat cover movement mechanism according to claim 3, characterized in that: A reinforcing rod is provided on the diagonal line of the upper supporting link to improve the structural strength of the upper supporting link.

5. The slat cover movement mechanism according to claim 1, characterized in that: The rotating connecting rod is a single-rod structure.

6. The slat cover movement mechanism according to claims 3 to 5, characterized in that: The connecting plate is a quadrilateral structure, and the four vertices of the quadrilateral structure respectively constitute the hinge points of the middle supporting link and the lower supporting link and the rotating shaft points of the upper rotating shaft and the lower rotating shaft.

7. The slat cover movement mechanism according to claim 6, characterized in that: The hinge points of the middle supporting link and the lower supporting link are located on the diagonal line of the quadrilateral, and the pivot points of the upper rotating shaft and the lower rotating shaft are located on the other diagonal line of the quadrilateral.

8. The slat cover movement mechanism according to claim 1, characterized in that: The connecting plate is hingedly mounted on the wing fixed structure via a connecting plate support, and the connecting plate and the connecting plate support are connected via a lower rotating shaft.

9. The slat cover movement mechanism according to claim 8, characterized in that: The slide rail is provided with a bent slide groove, and the end of the driving mechanism is provided with a protrusion, and the protrusion cooperates with the slide groove to realize the rotation of the lower rotating shaft.

10. The slat cover movement mechanism according to claim 1, characterized in that: The driving mechanism is a linear displacement actuator.

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