Balancing rocker arm of helicopter control system

Abstract

The utility model provides a balance rocker arm of a helicopter control system. The balance rocker arm comprises a support, a spring, a rocker arm body, a gasket, a limiting block, a bolt, a pin and a bearing. Wherein the support is fixed on a machine body, the spring, the rocker arm and the gasket are arranged on the support in series through standard parts, the fixed end of the spring is mounted on an initial mounting hole of the support, and the moving end of the spring is mounted on the limiting block; according to the helicopter flight control system rocker arm capable of generating balance force, a spring and a rocker arm body are combined together, the function of transmitting control instructions is achieved, and the balance force can be generated.

Description

Technical Field

[0001] This application belongs to the technical field of helicopter control system structures, and particularly relates to a balance rocker arm for a helicopter control system. Background Art

[0002] In modern helicopter control systems and control systems, since the hydraulic booster isolates the control stick from the pneumatic control surface, the pilot cannot feel the magnitude of the pneumatic control surface load. Therefore, a force-feel system is required to provide the necessary "artificial feel" to simulate the dynamic relationship between the pilot's operating force and the control surface.

[0003] The balance rocker arm is applied to the helicopter control system to provide the required "artificial feel" for the pilot. At the same time, the balance rocker arm can also be used to offset the unbalanced forces generated by other parts in the control system, thereby improving the handling quality of the aircraft.

[0004] Traditional control system rocker arms generally consist of a rocker arm, a support, a bearing, etc., as Figure 1 shown. Traditional control system rocker arms are mainly used to transmit the pilot's control commands and generally do not have the function of generating balanced forces. To balance unbalanced forces or provide the necessary "artificial feel" in the control system, counterweights or springs need to be additionally arranged in the control system to generate balanced forces. In this application, the spring and the rocker arm are combined together, having both the functions of a traditional rocker arm and the ability to generate balanced forces. Utility Model Content

[0005] The purpose of this application is to design a rocker arm for a helicopter flight control system that can generate balanced forces. This rocker arm combines a spring and a rocker arm together, having both the function of transmitting control commands and the ability to generate balanced forces.

[0006] This application provides a balance rocker arm for a helicopter control system, including a support, a spring, a rocker arm, a gasket, a limit block, bolts, pins, and bearings;

[0007] Among them, the support is fixed on the airframe, and the spring, rocker arm, and gasket are arranged in series on the support through standard parts. The fixed end of the spring is installed in the initial installation hole of the support, and the moving end is installed on the limit block.

[0008] Preferably, the support 1 is a tapered support with a flange and has an initial installation hole for the spring.

[0009] Preferably, the spring is a metal torsion spring, and the stiffness coefficient and working stroke of the torsion spring need to be designed according to the usage requirements.

[0010] Preferably, the rocker arm is installed with a bearing, enabling the rocker arm to rotate freely on the support and transmit the pilot's control commands.

[0011] Preferably, the gasket is used to adjust the axial position of the rocker arm on the support.

[0012] Preferably, the limit block is provided with a threaded hole for installation on the bolt, and is used to drive the moving end of the spring to move together with the rocker arm.

[0013] The present application has the following technical effects:

[0014] 1. A rocker arm for a helicopter flight control system that can generate a balancing force, which combines a spring and a rocker arm, having both the function of transmitting control commands and being able to generate a balancing force.

[0015] 2. Combining the spring and the rocker arm reduces the number of parts and saves the layout space.

[0016] 3. It can be used to offset the unbalanced forces generated by other parts in the control system and improve the control quality of the aircraft. Description of the Drawings

[0017] Figure 1 is a structural diagram of a rocker arm of an existing helicopter control system;

[0018] Figure 2 is a structural diagram (front view) of the rocker arm of the helicopter control system of the present application;

[0019] Figure 3 is a structural diagram (A - A) of the rocker arm of the helicopter control system of the present application;

[0020] Figure 4 is a structural diagram (B - B) of the rocker arm of the helicopter control system of the present application;

[0021] Figure 5 is a structural diagram (axonometric view) of the rocker arm of the helicopter control system of the present application;

[0022] Among them: 1 - support, 2 - spring, 3 - rocker arm, 4 - gasket, 5 - limit block, 6 - bolt, 7 - pin, 8 - bearing. Detailed Embodiments

[0023] Please refer to Figures 1 - 5 , a rocker arm for a helicopter flight control system that can generate a balancing force, and the rocker arm of the helicopter flight control system is composed of components such as a support 1, a spring 2, a rocker arm 3, a gasket 4, a limit block 5, a bolt 6, a pin 7, and a bearing 8.

[0024] The support 1 is a tapered support with a flange and has an initial spring installation hole.

[0025] The spring 2 is a metal torsion spring, and the stiffness coefficient and working stroke of the torsion spring need to be designed according to the usage requirements;

[0026] The rocker arm 3 has a housing structure for mounting the spring 2 and also has a fork ear structure for mounting the limit block 5 and the bolt 6.

[0027] The rocker arm 3 is installed with a bearing, enabling the rocker arm 3 to rotate freely on the support 1 and capable of transmitting the pilot's control instructions.

[0028] The gasket 4 is used to adjust the axial position of the rocker arm 3 on the support 1.

[0029] The limit block 5 is provided with a threaded hole for installation onto the bolt 6 and is used to drive the moving end of the spring to move together with the rocker arm.

[0030] The rocker arm 3 is equipped with a bearing and is installed onto the support 1 through a connecting component.

[0031] The fixed end of the spring 2 is installed into the initial installation hole of the support 1, and the moving end is installed onto the limit block 5.

[0032] The support 1 is a high-strength metal part and is connected to the airframe structure through bolts.

[0033] As Figure 2 、 3 、4 shows, a structural schematic diagram of a rocker arm of a helicopter control system capable of generating a balancing force according to the present application. The rocker arm includes a support 1, a spring 2, a rocker arm 3, a gasket 4, a limit block 5, a bolt 6, a pin 7, and a bearing 8. The support 1 is fixed to the airframe. The spring 2, the rocker arm 3, and the gasket 4 are arranged in series on the support 1 through standard parts. The axial position of the rocker arm 3 on the support 1 can be adjusted by gaskets 4 of different thicknesses, so as to fully ensure sufficient space for installing the spring 2 onto the support 1. The fixed end of the spring 2 is installed into the initial installation hole of the support 1, and the moving end is installed onto the limit block 5.

[0034] When the rocker arm 3 rotates, it can twist the spring 2, causing the spring 2 to generate an elastic balancing force acting on the control system. The limit block 5 is fixed to the rocker arm 3 through the bolt 6 and the pin 7 and is used to drive the moving end of the spring 2 to move together with the rocker arm 3.

[0035] The present application combines the spring and the rocker arm into one, which not only has the function of transmitting control instructions but also can generate a balancing force, and can be arranged at any position of the flight control system.

Claims

1. A balance rocker of a helicopter control system, characterized in that, It includes a support, a spring, a rocker arm, a gasket, a limit block, bolts, pins and bearings; Among them, the support is fixed on the body. The spring, rocker arm and gasket are arranged in series on the support through standard parts. The fixed end of the spring is installed in the initial installation hole of the support, and the moving end is installed on the limit block.

2. The balance rocker of the helicopter control system according to claim 1, characterized in that The support is a conical support with a flange and has an initial installation hole for the spring.

3. The balance rocker of the helicopter control system according to claim 2, characterized in that, The spring is a metal torsion spring, and the stiffness coefficient and working stroke of the torsion spring need to be designed according to the use requirements.

4. The balance rocker of the helicopter control system according to claim 3, characterized in that The rocker arm is installed with bearings, enabling the rocker arm to rotate freely on the support and can transmit the pilot's control instructions.

5. The balance rocker of the helicopter control system according to claim 4, characterized in that, The gasket is used to adjust the axial position of the rocker arm on the support.

6. The balance rocker of the helicopter control system according to claim 5, characterized in that The limit block is provided with a threaded hole and installed on the bolt, which is used to drive the moving end of the spring to move together with the rocker arm.

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