A foldable rudder torque transmission structure

Abstract

The present invention discloses a folding rudder torque transmission structure. Aiming at the problem that the torque transmission structure in the fixed rudder surface in the folding rudder deployment and locking mechanism is difficult to process, the square hole interface inside the fixed rudder surface is disassembled from the body to form a limit seat structure separately. After the limit seat and the fixed rudder surface are assembled into one body, they are connected to the deployment drive structure to realize torque transmission. The present invention greatly reduces the processing difficulty of the fixed rudder surface, has better processability, and is easier to ensure accuracy.

Description

Technical Field

[0001] The invention belongs to the technical field of aircraft, and in particular relates to a folding rudder torque transmission structure. Background Art

[0002] In order to improve the combat performance of weapon systems, various weapon platforms have increasingly stringent requirements on the size of aircraft such as missiles. In order to load more ammunition in a limited space, it is necessary to minimize the outline size of the aircraft. However, in order to obtain higher control and maneuverability, larger air rudders are often required. Folding rudder technology has become a key technology to solve the contradiction between aircraft loading space and control performance.

[0003] A typical hypersonic folding rudder usually consists of a fixed rudder surface, a dynamic rudder surface, and a folding and unfolding locking mechanism. The unfolding drive structure in the folding and unfolding locking mechanism generally adopts a torsion spring, a torsion bar, or a torsion plate. One end of the unfolding drive structure is connected to the fixed rudder surface, and the other end is connected to the dynamic rudder surface, which limits its freedom of rotation around the axial direction and uses its torsional deformation to generate unfolding power. In general, a hypersonic folding rudder requires no extra windows on the rudder surface. Therefore, it is a better solution to limit the torsional freedom of the drive structure around the axis by using a square key inside the rudder surface. However, the processing of the square key structure inside the rudder surface is difficult and the processing efficiency is low. Therefore, it is necessary to propose a torque transmission structure with good processing technology in response to the torque transmission requirements inside the folding rudder. Summary of the invention

[0004] In order to overcome the shortcomings of the prior art, the present invention provides a folding rudder torque transmission structure. Aiming at the problem that the torque transmission structure in the fixed rudder surface in the folding rudder deployment and locking mechanism is difficult to process, the square hole interface inside the fixed rudder surface is disassembled from the body to form a limit seat structure separately. After the limit seat and the fixed rudder surface are assembled into one body, they are connected to the deployment drive structure to realize torque transmission. The present invention greatly reduces the difficulty of processing the fixed rudder surface, has better processability, and is easier to ensure accuracy.

[0005] The technical solution adopted by the present invention to solve the technical problem is as follows:

[0006] A folding rudder torque transmission structure, comprising a moving rudder surface 1, a fixed rudder surface 2, a locking pin 3, a rear rotating shaft 4, an unfolding driving mechanism 5, a front rotating shaft 6 and a limit seat 7;

[0007] The dynamic rudder surface 1 and the fixed rudder surface 2 are connected via a rear shaft 4 and a front shaft 6; an unfolding drive structure 5 is provided inside the rear shaft 6, the front end of the unfolding drive structure 5 is connected to the fixed rudder surface 2 via the rear shaft 4, and the rear end of the unfolding drive structure 5 is connected to the dynamic rudder surface 1, so as to limit the torsional freedom of the unfolding drive structure 5 around the axial direction;

[0008] In the folded state, the unfolding drive structure 5 is in a twisted state; after the external constraints are released, the dynamic rudder surface 1 rotates around the front rotating shaft 6 and the rear rotating shaft 4 under the action of the unfolding drive structure 5 until the locking pin 3 enters the locking pin hole of the fixed rudder surface 2 to achieve locking;

[0009] The front end of the deployment drive structure 5 is a square key structure;

[0010] The limit seat 7 is a square structure with a flange, and a square hole is opened on the lower side; the square hole is used as a limit hole, and cooperates with the square key structure of the deployment drive structure 5 to limit the rotation of the dynamic control surface 1; the upper surface of the limit seat 7 has a flange and is provided with two mounting holes;

[0011] A square groove is processed partially on the fixed rudder surface 2 for installing a limit seat 7; the limit seat 7 is installed from the upper surface of the fixed rudder surface 2. After the folding rudder is unfolded, the upper surface of the limit seat 7 is inside the folding gap between the dynamic rudder surface 1 and the fixed rudder surface 2.

[0012] Preferably, the limit seat 7 is assembled with the main body structure of the fixed rudder surface 2 and then connected to the deployment drive structure 5 to achieve torque transmission.

[0013] The beneficial effects of the present invention are as follows:

[0014] 1. The present invention separately disassembles the square hole limit structure inside the fixed rudder surface to form a limit seat structure, which greatly reduces the processing difficulty of the fixed rudder surface and has better processability;

[0015] 2. The assembly accuracy is ensured by multiple positioning planes, and the overall accuracy is better than the square hole accuracy directly processed by special tools. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a typical schematic diagram of the folding rudder deployment and locking mechanism.

[0017] Figure 2 yes Figure 1 Schematic diagram of the fixed rudder surface structure.

[0018] Figure 3 It is a schematic diagram of the unfolding and locking mechanism of the folding rudder of the present invention.

[0019] Figure 4 It is a schematic diagram of the fixed rudder surface structure of the present invention.

[0020] Figure 5 It is a schematic diagram of the limit seat structure of the present invention.

[0021] In the figure, 1-moving rudder surface, 2-fixed rudder surface, 3-locking pin, 4-rear rotating shaft, 5-unfolding driving mechanism, 6-front rotating shaft, 7-limiting seat. DETAILED DESCRIPTION

[0022] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0023] The purpose of the present invention is to reduce the difficulty of processing a folding rudder and to propose a folding rudder torque transmission structure with good processing technology. On the premise of ensuring that the folding rudder can normally unfold and lock its function, the processing difficulty of the folding rudder is reduced and the processing efficiency of the folding rudder is improved.

[0024] The working principle of a typical folding rudder is as follows: the fixed rudder surface and the moving rudder surface are connected by two sets of front and rear rotating shafts, and an unfolding drive structure is designed inside the rotating shaft; when the rudder surface is in a folded state, the unfolding drive structure will deform within the elastic range; after the external constraints are released, the moving rudder surface will rotate under the drive of the unfolding drive structure, and when the front end of the locking pin begins to be pinned into the locking pin hole of the fixed rudder surface, the locking pin will pop out quickly under the action of the compression spring, realizing the unfolding and locking of the folding rudder. Furthermore, one end of the unfolding drive structure is limited by a square hole and square key to limit its torsional freedom, and the square hole structure inside the fixed rudder surface needs to be processed with a long tool with a smaller diameter, which is easy to cause the problem of insufficient processing accuracy and poor processability.

[0025] In order to solve the above problems, the present invention proposes a folding rudder torque transmission structure with good processability, in which the square hole interface inside the fixed rudder surface is disassembled from the main body to form a separate limit seat structure. After the limit seat structure is assembled with the fixed rudder surface main body structure, it is connected to the unfolding drive structure to realize torque transmission.

[0026] Preferably, the limit seat is installed from the upper surface of the fixed rudder surface. After the rudder surface is unfolded, the installation surface of the limit seat is inside the folding gap of the rudder surface, where the thermal environment is much lower than the outer surface of the rudder surface, so the heat protection risk is extremely small.

[0027] Furthermore, the limit seat has a simple structure, is easy to process, and the processing accuracy is easy to ensure.

[0028] Furthermore, the installation interface of the limit seat on the fixed rudder surface can be processed in place using conventional tools and equipment, and the accuracy is easy to ensure.

[0029] Furthermore, when the limit seat is assembled with the fixed rudder surface, plane positioning is achieved through the four side surfaces and the top flange, and the assembly accuracy is easily guaranteed.

[0030] Example:

[0031] Reference Figure 1As shown, the working principle of the typical folding rudder of the present invention is: the dynamic rudder surface 1 and the fixed rudder surface 2 are connected by two front and rear rotating shafts, and an unfolding drive structure 5 is designed inside the rear rotating shaft 6. The front end of the unfolding drive structure 5 is connected to the fixed rudder surface 2 through the rear rotating shaft 4, and the rear end is connected to the dynamic rudder surface 1, so as to limit the torsional freedom of the unfolding drive structure 5 around the axial direction. In the folded state, the unfolding drive structure 5 is in a torsion state; after the external constraints are released, the dynamic rudder surface 1 rotates around the front rotating shaft 6 and the rear rotating shaft 4 under the action of the unfolding drive structure 5 until the front and rear locking pins 3 enter the locking pin holes of the fixed rudder surface 2 to achieve locking.

[0032] Reference Figure 1 and Figure 2 As shown, in order to ensure that there is no opening on the outer surface of the air rudder, the front end of the deployment drive structure 5 adopts a square hole and a square key to limit the rotation, so it is necessary to machine a square hole structure with relatively high precision requirements in the middle position of the fixed rudder surface 2. Due to the deep depth of the square hole and the small local size, conventional tools cannot be used to process it in place, and the structure has poor processability.

[0033] Reference Figure 3 As shown, the present invention proposes a folding rudder torque transmission structure with good processability, in which the square hole interface inside the fixed rudder surface is disassembled from the main body to form a limit seat 7 separately, and the limit seat 7 is assembled with the main body structure of the fixed rudder surface 2 and then connected to the unfolding drive structure 5 to realize torque transmission.

[0034] Reference Figure 3 As shown, the limit seat 7 is installed from the upper surface of the fixed rudder surface 2. After the rudder surface is unfolded, the installation surface of the limit seat is inside the folding gap of the rudder surface.

[0035] Reference Figure 4 As shown, a square groove is processed locally on the fixed rudder surface 2 for installing the limit seat 7. The interface can be processed in place with conventional tools and equipment, and the accuracy is easy to ensure.

[0036] Reference Figure 5 As shown, the limit seat 7 is a square structure with a flange, and the lower square hole is the limit hole connected to the deployment drive structure 5. The upper surface of the limit seat 7 has a flange and is processed with two mounting holes. The overall structure is simple, the processing is easy, and the processing accuracy is easy to ensure.

Claims

1. A folding rudder torque transmission structure, characterized in that: It includes a moving rudder surface, a fixed rudder surface, a locking pin, a rear rotating shaft, an unfolding driving mechanism, a front rotating shaft and a limit seat; The dynamic rudder surface and the fixed rudder surface are connected through a rear shaft and a front shaft; an unfolding drive structure is arranged inside the rear shaft, the front end of the unfolding drive structure is connected to the fixed rudder surface through the rear shaft, and the rear end of the unfolding drive structure is connected to the dynamic rudder surface, so as to limit the torsional freedom of the unfolding drive structure around the axial direction; In the folded state, the unfolding drive structure is in a twisted state; after the external constraints are released, the dynamic rudder surface rotates around the front rotation axis and the rear rotation axis under the action of the unfolding drive structure until the locking pin enters the locking pin hole of the fixed rudder surface to achieve locking; The front end of the deployment drive structure is a square key structure; The limit seat is a square structure with a flange, and a square hole is opened on the lower side; the square hole is used as a limit hole, and cooperates with the square key structure of the deployment drive structure to limit the rotation of the dynamic rudder surface; the upper surface of the limit seat has a flange and is provided with two mounting holes; A square groove is processed partially on the fixed rudder surface for installing a limit seat; the limit seat is installed from the upper surface of the fixed rudder surface, and after the folding rudder is unfolded, the upper surface of the limit seat is inside the folding gap between the moving rudder surface and the fixed rudder surface.

2. A folding rudder torque transmission structure according to claim 1, characterized in that: After the limit seat is assembled with the fixed rudder surface body structure, it is connected with the deployment drive structure to realize torque transmission.

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