Variable transmission ratio mechanism

Abstract

The utility model belongs to the technical field of aircraft control system design, and particularly relates to a variable transmission ratio mechanism. The mechanism comprises a first rocker arm (1), one end of the first rocker arm (1) is connected with a control rod of an aircraft control system, the other end of the first rocker arm (1) is provided with two through holes, one through hole is a round hole, the other through hole is an arc-shaped hole, and the distances between arc points of the arc-shaped hole and the round hole are the same; one end of the second rocker arm (2) is connected with a control surface of the aircraft control system, and the other end of the second rocker arm (2) is provided with two through holes and is in bolted connection with the two through holes of the first rocker arm (1) through bolt assemblies. By adjusting the relative positions of the two rocker arms, rapid adjustment of the variable transmission ratio is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of aircraft control system design, and in particular to a variable transmission ratio mechanism. Background Art

[0002] In mechanical systems such as aircraft control systems, during the displacement transmission process, due to the limitations of transmission length, installation space and transmission ratio, the system generally has a rocker arm to change the direction or adjust the transmission ratio. The installation position and transmission ratio of the conventional rocker arm are set at the beginning of the redesign, and the transmission ratio of the entire system is determined after the mechanical system is assembled. However, due to the error of the rocker arm installation position and the inherent nonlinearity of the mechanical system, the assembled mechanical system will have a transmission ratio deviation and cannot meet the design requirements. The usual practice is to use the nonlinearity of the mechanical system to adjust the input state, but this method has a limited range for adjusting the transmission ratio. Utility Model Content

[0003] In order to solve at least one of the above technical problems, the present application designs a variable transmission ratio mechanism, which mainly includes:

[0004] A first rocker arm, one end of which is connected to a joystick of an aircraft control system, and the other end of which has two through holes, one of which is a circular hole and the other is an arc-shaped hole, and each point of the arc of the arc-shaped hole is at the same distance from the circular hole;

[0005] The second rocker arm has one end connected to the control surface of the aircraft control system and the other end has two through holes, which are respectively connected to the two through holes of the first rocker arm by bolt assemblies.

[0006] Preferably, the bolt assembly includes a first bolt and a first nut installed in the circular hole of the first rocker arm, and a second bolt and a second nut installed in the arc-shaped hole of the first rocker arm.

[0007] Preferably, the first rocker arm is a semicircular plate structure, the second rocker arm is a double-ear structure with two ears, and the side of the first rocker arm with the arc surface extends between the two ears of the second rocker arm.

[0008] Preferably, the second rocker arm forms the double-ear structure by providing an arc-shaped groove on one side.

[0009] Preferably, the first rocker arm is connected to the joystick via a pin.

[0010] Preferably, the second rocker arm is connected to the control surface via a pin.

[0011] The present application solves the problem of adjusting the transmission ratio of the system by using a rocker arm in a mechanical system, and realizes rapid adjustment of the variable transmission ratio by adjusting the relative positions of two rocker arms. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of a preferred embodiment of the variable transmission ratio mechanism of the present application.

[0013] Among them, 1-first rocker arm, 2-second rocker arm, 3-first bolt, 4-second bolt, 5-first nut, 6-second nut. DETAILED DESCRIPTION

[0014] In order to make the purpose, technical scheme and advantages of the implementation of this application clearer, the technical scheme in the implementation of this application will be described in more detail in combination with the drawings in the implementation of this application. In the drawings, the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The described implementation is a part of the implementation of this application, not all of the implementations. The implementation described below with reference to the drawings is exemplary and is intended to be used to explain this application, and cannot be understood as a limitation on this application. Based on the implementation in this application, all other implementations obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application. The implementation of this application is described in detail below in combination with the drawings.

[0015] The present application provides a variable transmission ratio mechanism, such as Figure 1 As shown, it mainly includes:

[0016] A first rocker arm 1, one end of which is connected to a joystick of an aircraft control system, and the other end of which has two through holes, one of which is a circular hole and the other is an arc-shaped hole, and each point of the arc of the arc-shaped hole is at the same distance from the circular hole;

[0017] The second rocker arm 2 has one end connected to the control surface of the aircraft control system and the other end having two through holes, which are respectively bolted to the two through holes of the first rocker arm 1 through bolt assemblies.

[0018] The present application adopts a combination of two rocker arms, where one rocker arm rotates relative to the other rocker arm to achieve the purpose of changing the position of the input point and output point of the rocker arm relative to the rocker arm shaft, thereby realizing a change in the transmission ratio.

[0019] In some optional embodiments, the bolt assembly includes a first bolt 3 and a first nut 5 installed in a circular hole of the first rocker arm, and a second bolt 4 and a second nut 6 installed in an arc-shaped hole of the first rocker arm.

[0020] When working, first fix the first rocker arm 1 and the second rocker arm 2 with the first bolt 3 and the first nut 5, then adjust the first rocker arm 1 and the second rocker arm 2 to a suitable position, and tighten the second bolt 4 and the second nut 6. In this way, the variable transmission ratio mechanism is assembled. When the transmission ratio needs to be adjusted, loosen the two bolts, move the position of the second bolt in the arc hole, adjust the relative angle between the first rocker arm and the second rocker arm, and then tighten the bolts, and the transmission ratio of the combined rocker arm will change.

[0021] In some optional embodiments, the first rocker arm 1 is a semicircular plate structure, the second rocker arm 2 is a double-ear structure with two ears, and one side of the first rocker arm 1 with a curved surface extends between the two ears of the second rocker arm 2.

[0022] In some optional embodiments, the second rocker arm 2 forms the double-ear structure by providing an arc-shaped groove on one side. In this embodiment, the end of the second rocker arm 2 connected to the first rocker arm 1 is provided with an arc-shaped groove to form an upper and lower plate surface, the arc-shaped groove is used to accommodate the first rocker arm 1, and through holes are provided on the upper and lower plate surfaces of the second rocker arm 2 and the plate surface of the first rocker arm 1 accommodated in the arc-shaped groove.

[0023] In some optional embodiments, the first rocker arm 1 is connected to the joystick via a pin.

[0024] In some optional embodiments, the second rocker arm 2 is connected to the control surface via a pin.

[0025] The present application solves the problem of using a rocker arm to adjust the transmission ratio of a mechanical system.

[0026] 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 variable transmission ratio mechanism, characterized in that: include: A first rocker arm (1), one end of which is connected to a joystick of an aircraft control system, and the other end of which has two through holes, one of which is a circular hole and the other is an arc-shaped hole, and each point of the arc of the arc-shaped hole is at the same distance from the circular hole; The second rocker arm (2) has one end connected to the control surface of the aircraft control system and the other end having two through holes, which are respectively bolted to the two through holes of the first rocker arm (1) through bolt assemblies.

2. The variable transmission ratio mechanism according to claim 1, characterized in that: The bolt assembly comprises a first bolt (3) and a first nut (5) installed in a circular hole of the first rocker arm, and a second bolt (4) and a second nut (6) installed in an arc-shaped hole of the first rocker arm.

3. The variable transmission ratio mechanism according to claim 1, characterized in that: The first rocker arm (1) is a semicircular plate structure, the second rocker arm (2) is a double-ear structure with two ears, and one side of the first rocker arm (1) with an arc surface extends between the two ears of the second rocker arm (2).

4. The variable transmission ratio mechanism according to claim 3, characterized in that: The second rocker arm (2) forms the double-ear structure by providing an arc-shaped groove on one side.

5. The variable transmission ratio mechanism according to claim 1, characterized in that: The first rocker arm (1) is connected to the operating lever via a pin shaft.

6. The variable transmission ratio mechanism according to claim 1, characterized in that: The second rocker arm (2) is connected to the control surface via a pin.

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