Variable angle rudder offset structure

Abstract

The utility model relates to a rudder deflection structure technical field provides a variable angle's rudder deflection structure, and rudder deflection structure includes rudder body, carrier and angle piece, still includes rudder base, rudder body is connected fixedly with rudder base, and rudder base is equipped with the connecting flange, and the mortise of accommodating connecting flange is equipped on the carrier, and connecting flange is connected with the carrier through screw and the screw hole on connecting flange is arc waist -shaped hole, one side of connecting flange is equipped with first locating surface, and angle piece is detachably connected with carrier, and angle piece is equipped with the second locating surface that sticks with first locating surface. The utility model discloses through rotating rudder base and replacing different angle piece, can realize the deflection demand of rudder body, and the operation process only needs to dismount angle piece, and rudder body and rudder base only rotate (will not remove), simplify the operation process, also reduced the requirement to repeated positioning accuracy.

Description

Technical Field

[0001] This utility model relates to the field of rudder deflection structure technology, and more specifically, to a rudder deflection structure with a variable angle. Background Technology

[0002] Rudders are the core components for controlling the heading and direction of motion of equipment. They are widely used in aerospace vehicles. When airflow passes by, manipulating them to deflect to the left or right can cause the vehicle to generate a right or left torque, thereby changing the heading of the vehicle. Therefore, the aerodynamic shape of the rudder surface is particularly important in the development of new aircraft.

[0003] In the structural design of scaled-down wind tunnel test models of aircraft with rudders, the most common method for designing the rudder deflection section to change the rudder angle is to mount the rudder onto angle-changing plates at different angles. For example, existing technologies with publication numbers "CN219178868U" and "CN110702354A" both employ this structure. However, changing the rudder angle requires disassembling both the rudder and the angle-changing plates, replacing the plates, and then reassembling them back onto the carrier. This method is not only cumbersome but also requires extremely high repeatability and positioning accuracy. Utility Model Content

[0004] The purpose of this invention is to provide a variable-angle rudder deflection structure to overcome the aforementioned deficiencies of the prior art.

[0005] This utility model is achieved through the following technical solution: A variable-angle rudder deflection structure includes a rudder body, a carrier, and a variable-angle plate, and also includes a rudder base. The rudder body is connected and fixed to the rudder base. The rudder base is provided with a connecting flange. The carrier is provided with a countersunk hole to accommodate the connecting flange. The connecting flange is connected to the carrier by screws, and the screw holes on the connecting flange are arc-shaped waist-shaped holes. A first positioning surface is provided on one side of the connecting flange. The variable-angle plate is detachably connected to the carrier. The variable-angle plate is provided with a second positioning surface that fits against the first positioning surface.

[0006] Furthermore, the rudder deflection structure also includes a balance, which is located inside the rudder base and one end is connected to the rudder body by a fastener. The other end of the balance is engaged with the rudder base through a shaft hole and is circumferentially fixed. The end of the balance is connected and fixed to the rudder base by a tension screw.

[0007] Furthermore, the balance and the rudder base are circumferentially fixed together by a connecting key.

[0008] Furthermore, the rudder base is provided with a conical hole, and the balance is provided with a truncated cone that mates with the conical hole.

[0009] Furthermore, a gap is left between the rudder body and the rudder base.

[0010] Furthermore, the end of the balance connected to the rudder body is provided with a positioning frustum, and the rudder body is provided with a positioning hole that mates with the positioning frustum.

[0011] Furthermore, a positioning notch is provided on one side of the positioning frustum, and a positioning protrusion that mates with the positioning notch is provided on the side wall of the positioning hole.

[0012] Furthermore, the carrier and the rudder base are fitted together via a shaft hole.

[0013] Furthermore, the rudder deflection structure also includes two shaped cover plates, which cover the countersunk hole and are connected to the carrier by fasteners, with the rudder body extending from the shaped cover plates.

[0014] Furthermore, a gap is left between the rudder body and the attached cover plate.

[0015] The technical solution of this utility model has at least the following advantages and beneficial effects: In this utility model, since the holes of the connecting flange mounting screws on the rudder base are arc-shaped waist-shaped holes, the rudder base can still be connected to the carrier by screws after rotation. In practical applications, a variety of variable angle plates are designed (each variable angle plate has a different inclination angle of the second positioning surface). By rotating the rudder base and replacing different variable angle plates, the deflection requirements of the rudder body can be achieved. The operation process only requires disassembling and assembling the variable angle plates. The rudder body and rudder base only rotate (without being disassembled), which simplifies the operation process and reduces the requirements for repeatability positioning accuracy. Attached Figure Description

[0016] Figure 1 A schematic diagram of a variable-angle rudder deflection structure provided by this utility model; Figure 2 A three-dimensional partial cross-sectional view of a variable-angle rudder deflection structure provided for this utility model; Figure 3 A planar sectional view of a variable-angle rudder deflection structure provided by this utility model; Figure 4 A schematic diagram of a variable-angle rudder deflection structure provided by this utility model (with hidden cover plate); Figure 5 This is an enlarged structural diagram of the carrier; Figure 6 This is an enlarged structural diagram of the rudder base; Figure 7 This is an enlarged cross-sectional view of the rudder base; Figure 8 This is an enlarged structural diagram of the rudder. Figure 9 This is a magnified schematic diagram of the balance. Figure 10 This is a schematic diagram of the variable angle plate in this embodiment; Figure 11 This is a schematic diagram of the variable angle plate in other embodiments; Figure 12 This is an enlarged structural schematic diagram of the shaped cover plate; Reference numerals: 1-Rudder body, 101-Locking circular hole, 102-Locking protrusion, 2-Carrier, 201-Counterhead, 202-Mounting hole, 203-Mounting notch, 204-Locking block, 3-Rudder base, 301-Connecting flange, 302-First positioning surface, 303-Conical hole, 304-Screw hole, 4-Variable angle plate, 401-Second positioning surface, 5-Balance, 501-Locking frustum, 502-Locking notch, 503-Conical frustum, 6-Tightening screw, 7-Washer, 8-Cover plate, 801-Locking step, 9-Connecting key. Detailed Implementation

[0017] refer to Figures 1-4 A variable-angle rudder deflection structure includes a rudder body 1, a carrier 2, a rudder base 3, and a variable-angle plate 4. The rudder body 1 is connected and fixed to the rudder base 3, meaning that after installation, the rudder body 1 and the rudder base 3 are a single unit. The rudder base 3 is provided with a connecting flange 301, and the carrier 2 is provided with a countersunk hole 201 to accommodate the connecting flange 301. The variable-angle plate 4 is detachably connected to the carrier 2. Specifically, one side of the countersunk hole 201 is provided with an installation notch 203 that mates with the variable-angle plate 4 to achieve positioning of the variable-angle plate 4. The detachable connection method is screw connection.

[0018] refer to Figure 2 , Figure 5 , Figure 6 and Figure 10 The connecting flange 301 has a first positioning surface 302 on one side, and the variable angle plate 4 has a second positioning surface 401 that fits against the first positioning surface 302. The connecting flange 301 is connected to the carrier 2 by screws, and the screw holes 304 on the connecting flange 301 are arc-shaped waist-shaped holes. With this configuration, the rudder base 3 can still be connected and secured to the carrier 2 by screws after rotating around the countersunk hole 201. In practical applications, various variable angle plates 4 are designed (see reference). Figure 10 and Figure 11 Each variable angle plate 4 has a different tilt angle on its second positioning surface 401. By rotating the rudder base 3 and replacing different variable angle plates 4, the deflection requirement of the rudder body 1 can be achieved. The operation process only requires disassembling and assembling the variable angle plates 4. The rudder body 1 and the rudder base 3 are only rotated (not disassembled), which simplifies the operation process and reduces the requirements for repeatability accuracy.

[0019] The carrier 2 and the rudder base 3 are fitted together via a shaft hole. Specifically, the carrier 2 is provided with a mounting hole 202 that fits with the rudder base 3, and the mounting hole 202 is concentric with the countersunk hole 201. Furthermore, the fit tolerance between the carrier 2 and the rudder base 3 is preferably a clearance fit, which ensures accurate positioning of both and facilitates smooth rotation of the rudder base 3 when the angle of the rudder body 1 is changed, and also ensures reliable positioning of the rudder base 3 after rotation.

[0020] refer to Figure 1 and Figure 12 The rudder deflection structure also includes two shaped cover plates 8, which cover the countersunk hole 201 and are connected to the carrier 2 by fasteners. The rudder body 1 extends out from the shaped cover plates 8. It should be understood that the shaped cover plates 8 are equivalent to a part clipped off from the carrier 2. The function of the shaped cover plates 8 is to ensure the integrity of the carrier 2's surface as much as possible and avoid affecting the flow field. Furthermore, a gap is left between the rudder body 1 and the shaped cover plates 8 to prevent collisions during the test that would affect the test results.

[0021] Screws are selected as the fasteners for connecting the shaped cover plate 8 (screws are preferred for all fasteners mentioned in this embodiment, and will not be described in detail below). In practical applications, protruding positioning blocks 204 are provided at both ends of the carrier 2, and positioning steps 801 that cooperate with the positioning blocks 204 are provided on the shaped cover plate 8 to facilitate the quick positioning and installation of the shaped cover plate 8.

[0022] refer to Figure 2 , Figure 6 , Figure 7 , Figure 8 and Figure 9 In this embodiment, the rudder body 1 and the rudder base 3 are connected as follows: the rudder deflection structure also includes a balance 5, which is located inside the rudder base 3 and one end is connected to the rudder body 1 by fasteners. In this embodiment, the end of the balance 5 connected to the rudder body 1 is provided with a positioning frustum 501, and the rudder body 1 is provided with a positioning hole 101 that mates with the positioning frustum 501. Furthermore, one side of the positioning frustum 501 is provided with a positioning notch 502, and the side wall of the positioning hole 101 is provided with a positioning protrusion 102 that mates with the positioning notch 502, which facilitates the quick positioning and installation of the rudder body 1 and the balance 5. Based on this, the fasteners connecting the rudder body 1 and the balance 5 are arranged radially along the balance 5.

[0023] A gap is left between the rudder body 1 and the rudder base 3 to prevent collisions during the test that could affect the test results.

[0024] The other end of the balance 5 is fitted to the rudder base 3 via a shaft hole and is circumferentially fixed. In this embodiment, the rudder base 3 and the balance 5 are fitted together via a shaft hole as follows: the rudder base 3 has a tapered hole 303, and the balance 5 has a frustum 503 that fits into the tapered hole 303. The fit between the tapered hole 303 and the frustum 503 facilitates concentricity between the balance 5 and the rudder base 3. In other embodiments, a cylindrical hole fitting can also be used.

[0025] It is easy to understand that "circumferentially relatively fixed" means that there will be no relative rotation between the two. In this embodiment, the balance 5 and the rudder base 3 are circumferentially relatively fixed through the connecting key 9. In other embodiments, other methods can be chosen to achieve circumferential relative fixation between the balance 5 and the rudder base 3, such as through mutually cooperating teeth, or other methods.

[0026] The balance 5 is connected and fixed to the rudder base 3 by a tension screw 6. As is easy to understand, the rudder base 3 has a through hole inside, and the balance 5 is provided with a threaded hole for connecting to the tension screw 6. A washer 7 is provided on the rudder base 3 to support the head of the tension screw 6. After tightening the tension screw 6, the balance 5 and the rudder base 3 can be fixed. In actual application, in order to ensure the tensioning effect, an elastic washer can also be added between the washer 7 and the head of the tension screw 6.

[0027] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A variable-angle rudder deflection structure, comprising a rudder body, a carrier, and a variable-angle plate, characterized in that, It also includes a rudder base, the rudder body is connected and fixed to the rudder base, the rudder base is provided with a connecting flange, the carrier is provided with a countersunk hole to accommodate the connecting flange, the connecting flange and the carrier are connected by screws and the screw holes on the connecting flange are arc-shaped waist-shaped holes; a first positioning surface is provided on one side of the connecting flange, the variable angle plate is detachably connected to the carrier, and the variable angle plate is provided with a second positioning surface that fits with the first positioning surface.

2. The variable-angle rudder deflection structure according to claim 1, characterized in that, The rudder deflection structure also includes a balance, which is located inside the rudder base and one end is connected to the rudder body by a fastener. The other end of the balance is engaged with the rudder base through a shaft hole and is circumferentially fixed. The end of the balance is connected and fixed to the rudder base by a tension screw.

3. The variable-angle rudder deflection structure according to claim 2, characterized in that, The balance and the rudder base are circumferentially fixed together by a connecting key.

4. The variable-angle rudder deflection structure according to claim 2, characterized in that, The rudder base is provided with a conical hole, and the balance is provided with a truncated cone that mates with the conical hole.

5. The variable-angle rudder deflection structure according to claim 2, characterized in that, A gap is left between the rudder body and the rudder base.

6. The variable-angle rudder deflection structure according to claim 2, characterized in that, The balance is provided with a positioning frustum at one end connected to the rudder body, and the rudder body is provided with a positioning hole that mates with the positioning frustum.

7. The variable-angle rudder deflection structure according to claim 6, characterized in that, The positioning frustum has a positioning notch on one side, and the positioning hole has a positioning protrusion on its side wall that mates with the positioning notch.

8. The variable-angle rudder deflection structure according to any one of claims 1-7, characterized in that, The carrier and the rudder base are fitted together via a shaft hole.

9. The variable-angle rudder deflection structure according to any one of claims 1-7, characterized in that, The rudder deflection structure also includes two shaped cover plates that cover the countersunk hole and are connected to the carrier by fasteners, with the rudder body extending from the shaped cover plates.

10. The variable-angle rudder deflection structure according to claim 9, characterized in that, A gap is left between the rudder and the attached cover plate.

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