Rudder connecting structure

Abstract

The invention provides a rudder connecting structure, and belongs to the field of aircraft structure design, the rudder connecting structure comprises: a box section suspension support arm fixed on a fuselage structure; the rudder support is fixed on the rudder; the connecting pin shaft is used for connecting the box section suspension support arm and the rudder support and is provided with a boss, one side of the boss is of a polished rod structure, the other side of the boss is of a threaded structure, the polished rod structure is connected with the box section suspension support arm, and the threaded structure is connected with the rudder support; the stabilizer suspension joint is fixedly arranged on the stabilizer structure, a stepped hole is formed in the stabilizer suspension joint, and a second bearing is arranged in the stepped hole; and the rudder hollow rotating shaft is fixed on the rudder, the side part of the rudder hollow rotating shaft is provided with a rudder hollow rotating shaft support, the end part of the rudder hollow rotating shaft axially extends to form a threaded structure, and the threaded structure penetrates through the second bearing and then is locked through a nut, so that the connection between the rudder hollow rotating shaft and the stabilizer suspension joint is realized.

Description

Technical Field

[0001] The present application belongs to the field of aircraft structure design, and in particular relates to a rudder connection structure. Background Art

[0002] The rudder is used to ensure the yaw control characteristics of the aircraft. It is mainly connected to the stabilizer through multiple sets of hinges to ensure that the rudder can deflect around the axis normally and at the same time transmit the radial and axial loads of the rudder to the stabilizer.

[0003] However, the existing rudder connection is generally designed with multiple sets of suspension arms or supports connected to the stabilizer box section. Each set of docking hinge points needs to be designed with docking bolts to meet the radial load transmission requirements, and a sliding bushing group or a non-sliding bushing group needs to be set to meet the axial load requirements. The clearance and matching dimensions of related components are complicated. When disassembling the rudder, all bolts and bushings need to be disassembled first, which affects the efficiency of rudder disassembly. Summary of the invention

[0004] The object of the present application is to provide a rudder connection structure to solve or alleviate at least one problem in the background technology.

[0005] The technical solution of the present application is: a rudder connection structure, comprising:

[0006] A box-section suspension arm fixed to the fuselage structure;

[0007] A rudder support fixed to the rudder;

[0008] A connecting pin for connecting the box-section suspension arm and the rudder support, the connecting pin having a boss, one side of the boss of the connecting pin being a bare rod structure and the other side being a threaded structure, the connecting pin on one side of the bare rod structure being connected to the box-section suspension arm, and the connecting pin on one side of the threaded structure being connected to the rudder support;

[0009] A stabilizer suspension joint fixedly arranged on the stabilizer structure, wherein the stabilizer suspension joint is provided with a step hole, and a second bearing is provided in the step hole;

[0010] A rudder hollow shaft is fixed on the rudder, a rudder hollow shaft support is provided on the side of the rudder hollow shaft, a thread structure is axially extended at the end of the rudder hollow shaft, and the thread structure passes through the second bearing and is locked by a nut to achieve the connection between the rudder hollow shaft and the stabilizer suspension joint.

[0011] In an optional embodiment of the present application, the box-section suspension arm is an L-shaped structure, one side plane of the L-shaped structure is fixed to the fuselage structure by a connecting piece, and the cantilever of the L-shaped structure extends laterally for connection with the rudder support.

[0012] In an optional embodiment of the present application, the rudder support is an L-shaped structure, and the L-shaped structure of the box-segment suspension arm is arranged in the opposite direction to the L-shaped structure of the rudder support.

[0013] In an optional implementation manner of the present application, a first bearing is installed in the box-segment suspension arm, and a connecting pin on one side of the bare rod structure is installed in the first bearing.

[0014] In an optional embodiment of the present application, the first bearing is a cylindrical roller bearing.

[0015] In an optional embodiment of the present application, a gap is provided between the boss of the connecting pin shaft and the first bearing in the box section suspension arm.

[0016] In an optional implementation manner of the present application, the gap is 1 mm to 3 mm.

[0017] In an optional embodiment of the present application, the second bearing is a ball bearing

[0018] In an optional implementation manner of the present application, the connecting pin is a stainless steel part, and the rudder support, the box-section suspension arm and the rudder hollow shaft support are aluminum alloy machined parts.

[0019] In an optional implementation manner of the present application, the rudder hollow shaft support is an L-shaped structure, and the side surface of the L-shaped structure and the stabilizer suspension joint form a limiting structure for the rudder rotation angle.

[0020] The rudder connection structure of the present application forms an upper-hanging and lower-clamping rudder connection form. The rudder can be pulled out upward (axially) by simply removing the lower bolts, which reduces the complexity of the docking design, makes the rudder load transmission division of labor clear, and improves the disassembly and assembly efficiency of the rudder surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] 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.

[0022] Figure 1 This is a schematic diagram of the rudder connection structure of this application. DETAILED DESCRIPTION

[0023] 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.

[0024] In order to overcome the problem in the prior art that all bolts and screw sleeves need to be removed when disassembling the rudder, which affects the efficiency of rudder disassembly and assembly, the present application provides an upper hanging and lower clamping rudder connection structure.

[0025] like Figure 1 As shown, the rudder connection structure provided in the present application includes: a rudder support 21, a box-section suspension arm 22, a connecting pin 23, a stabilizer suspension joint 24 and a rudder hollow shaft support 25.

[0026] The box-section suspension arm 22 is fixed on the fuselage structure and is used to carry the rudder 10 .

[0027] In some embodiments of the present application, the box-section suspension arm 22 is an L-shaped structure, one side of which can be fixed to the fuselage structure by connecting parts such as rivets or bolts, and the cantilever extends laterally for connection with the rudder support 21.

[0028] One end of the rudder support 21 is fixed on the rudder 10, and the other end is supported on the box-section suspension arm 22. In some embodiments of the present application, the rudder support 21 is also an L-shaped structure, and the L-shaped structure of the box-section suspension arm 22 is arranged in the opposite direction to the L-shaped structure of the rudder support 21.

[0029] The connecting pin 23 is used to connect the box-section suspension arm 22 and the rudder support 21, wherein a boss 231 is provided in the middle of the connecting pin 23, and the lower side connected with the box-section suspension arm 22 is a bare rod structure, and the upper side connected with the rudder support 21 is a threaded structure. The lower side of the connecting pin 23 is inserted into the box-section suspension arm 22 and is limited by the boss 231, and the upper side of the connecting pin 23 is inserted into the rudder support 21 and is locked by a nut (not shown), so that the rudder 10 is installed on the connecting pin 23 supported by the box-section suspension arm 22.

[0030] The upper hinge point of the rudder 10 is formed by the rudder support 21 , the box suspension arm 22 and the connecting pin 23 .

[0031] In the preferred embodiment of the present application, a first bearing 221 is arranged in the hole of the box section suspension arm 22 for installing the connecting pin 23. Further, the first bearing 221 can be a cylindrical roller bearing that can withstand a large radial load.

[0032] In some embodiments of the present application, a gap is provided between the boss 231 of the connecting pin 23 and the first bearing 221 in the box-section suspension arm 22. Further, the gap can be set to 1 mm to 3 mm.

[0033] One side of the stabilizer suspension joint 24 is fixedly arranged on the stabilizer structure, and the other side is provided with a step hole, in which a second bearing 251 is pressed. A rudder hollow shaft support 25 is fixed to the end of the rudder hollow shaft 26, and the rudder hollow shaft 26 is fixedly connected to the rudder 10. The rudder hollow shaft support 25 is in contact with the inner ring of the second bearing 251. The bolts extending from the lower end of the rudder hollow shaft 26 pass through the second bearing 251, and the bolts on the lower side of the stabilizer suspension joint are fixed, thereby forming the lower hinge point of the rudder 10. The axial load of the rudder 10 is transmitted to the stabilizer suspension joint 24 after the bolts clamp the second bearing 251, and the upper connection of the rudder 10 is axially unconstrained.

[0034] In a preferred embodiment of the present application, the second bearing 251 is a ball bearing, so that it can bear axial load.

[0035] In some embodiments of the present application, the connecting pin 23 is a stainless steel part, and the rudder support 21 and the box-section suspension arm 22 are aluminum alloy machined parts. In addition, the rudder hollow shaft support 25 is also an aluminum alloy machined part, which is an L-shaped structure, and the side of the L-shaped structure cooperates with the stabilizer suspension joint 24 at the extreme limit position of the rudder 10, so that the rudder hollow shaft support 25 and the stabilizer suspension joint 24 form a limit structure for the rotation angle of the rudder 10.

[0036] The upper rudder support 21 of the rudder connection structure provided by the present application adopts the method of inserting the connecting pin 23. The upper connecting pin 23 only needs to be hung in the bearing hole of the box-section suspension arm 23, and does not need to be fixed by bolts, and does not need to design a sliding bushing group. The lower rudder hollow shaft support 25 is connected by bolt clamping. At the same time, a stepped bearing hole is designed in the lower stabilizer suspension support 24 to withstand the rudder axial load, which can not only meet the rudder axial transfer, but also realize the rudder structure limit. The rudder connection structure of the present application forms a rudder connection form of upper hanging and lower clamping. The rudder can be pulled out upward (axially) by simply removing the lower bolts, which reduces the complexity of the docking design, makes the rudder load transmission division clear, and improves the efficiency of disassembly and assembly of the rudder surface.

[0037] 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 rudder connection structure, characterized in that: include: A box-section suspension arm fixed to the fuselage structure; A rudder support fixed to the rudder; A connecting pin for connecting the box-section suspension arm and the rudder support, the connecting pin having a boss, one side of the boss of the connecting pin being a bare rod structure and the other side being a threaded structure, the connecting pin on one side of the bare rod structure being connected to the box-section suspension arm, and the connecting pin on one side of the threaded structure being connected to the rudder support; A stabilizer suspension joint fixedly arranged on the stabilizer structure, wherein the stabilizer suspension joint is provided with a step hole, and a second bearing is provided in the step hole; A rudder hollow shaft is fixed on the rudder, a rudder hollow shaft support is provided on the side of the rudder hollow shaft, a thread structure is axially extended at the end of the rudder hollow shaft, and the thread structure passes through the second bearing and is locked by a nut to achieve the connection between the rudder hollow shaft and the stabilizer suspension joint.

2. The rudder connection structure according to claim 1, characterized in that: The box-section suspension arm is an L-shaped structure, one side plane of the L-shaped structure is fixed to the fuselage structure through a connecting piece, and the cantilever of the L-shaped structure is extended laterally to be connected to the rudder support.

3. The rudder connection structure according to claim 2, characterized in that: The rudder support is an L-shaped structure, and the L-shaped structure of the box-section suspension arm is arranged in the opposite direction to the L-shaped structure of the rudder support.

4. The rudder connection structure according to claim 1, characterized in that: A first bearing is installed in the box section suspension support arm, and a connecting pin shaft on one side of the bare rod structure is installed in the first bearing.

5. The rudder connection structure according to claim 4, characterized in that: The first bearing is a cylindrical roller bearing.

6. The rudder connection structure according to claim 4 or 5, characterized in that: A gap is provided between the boss of the connecting pin shaft and the first bearing in the box section suspension arm.

7. The rudder connection structure according to claim 6, characterized in that: The gap is 1 mm to 3 mm.

8. The rudder connection structure according to claim 1, characterized in that: The second bearing is a ball bearing.

9. The rudder connection structure according to claim 1, characterized in that: The connecting pin is a stainless steel part, and the rudder support, the box-section suspension arm and the rudder hollow shaft support are aluminum alloy machined parts.

10. The rudder connection structure according to claim 9, characterized in that: The rudder hollow shaft support is an L-shaped structure, and the side surface of the L-shaped structure and the stabilizer suspension joint form a limiting structure for the rudder rotation angle.

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