JP3064523U - Multi-layer rotor head with Hiller control and bell control - Google Patents

Abstract

(57) [Summary] [Purpose] Of the multiple main rotors, use some main rotors for Hiller control and Bell control,
The purpose is to make the helicopter fly stably even when there are external factors such as wind. [Structure] An arm for transmitting the inclination of the main rotor and a seesaw for transmitting the movement of the main rotor to other main rotors. Also, the inclination of the swash plate and the inclination of the seesaw are mixed. To install the mixing lever shown in Fig. 3- Main rotor head that can perform Hiller control and Bell control configured as described above.

Description

[Detailed description of the invention] [Industrial applications]

 The present invention relates to a main rotor head of a helicopter.

[Prior art]

 FIG. 1 shows the mechanism of mixing Bell Control and Hiller Control. First, bell control and Hiller control will be described using this as an example. The rotating main rotor is controlled by the swashplate of FIG. Assuming that the main rotor rotation is clockwise and B is the nose of the helicopter, and the swash plate in Fig. 1 is tilted forward, the stabilizer in Fig. 1 is inclined and lowered. Naturally, the connected seesaw FIG. 1 is inclined, and the fulcrum of the mixing lever FIG. 1 is lowered. The pitch lever figure 1 in the main rotor figure 1 goes down and the pitch in the main rotor figure 1 goes up. Such a control mechanism is called Hiller control. The Hiller control allows the helicopter to be operated freely, and at the same time plays a role in maintaining the stability of the main rotor rotation surface due to external factors. In other words, it can be said that the swash plate is a stabilizer-based control mechanism for controlling the rotating surface of the stabilizer. Also, in FIG. 1, when it is considered that the main rotor is rotated by 90 degrees (the main rotor in FIG. 1 is in the position A), the swash plate in FIG. The angle of-decreases. In this case, the stabilizer plays a role of a kind of weight to the last, and it is not the main control, but has the role of canceling out the unstable element by centrifugal force and gyro effect. In other words, it can be said that the swash plate controls the main rotor, and the stabilizing plate simply adds a stabilizing element to its control. Such a mechanism is called bell control. Generally, a model helicopter is controlled by mixing a bell control mechanism and a Hiller control mechanism. However, this is effective only when there are two main rotors, and when the main rotor is a multi-main rotor with two or more, bell control and Hiller control mixing was impossible. The main rotor head for a multi-sheet main rotor that is often used in actual machines is as shown in Fig. 2. The main rotor head is controlled by a linkage directly connected to the swash plate shown in Fig. 2, but it is controlled by external forces such as wind. When stability is lost due to factors, there is no recovery and stabilization mechanism like the Hiller control mechanism or bell control mechanism. However, in the case of a real helicopter, the instability factor is greatly reduced due to the difference in absolute mass, but it is very unstable for a model helicopter, meaning that it is difficult to control. Originally, the purpose of increasing the number of model main rotor heads is to reproduce a model that is faithful to the actual machine. Therefore, no matter how faithful the appearance of the actual aircraft is, it is true that flight performance is not involved.

[Problems to be solved by the invention]

 The purpose of the present invention is to realize a main rotor head control mechanism that does not impair stability and mobility even with a multi-main rotor head, and achieve both appearance and flight performance.

[Means for Solving the Problems]

 Being able to perform bell control and hiller control on a multi-main rotor head is a means to solve the problem. In order to realize this, an arm for transmitting the inclination of the main rotor is shown in Fig. 3-, a seesaw for transmitting the movement to another main rotor, Fig. 3-, and an inclination of the swash plate and the seesaw Fig. 3 A mixing lever (Fig. 3) for mixing the negative inclination is installed. In this way, it is possible to use not only the buoyancy but also the bell control and the hiller control by using a part of the main rotor of the multi-sheet main rotor.

[Action]

 Assuming that the main rotor rotates clockwise and B in Fig. 3 is the nose of the helicopter, tilting the swash plate in Fig. 3 forward reduces the angle of the main rotor in Fig. 3 and lowers it at the same time. The arm 3 connected to the main rotor in FIG. 3 also lowers, the seesaw 3 tilts forward, and the fulcrum of the mixing lever 3 lowers. Then, the pitch lever figure 3- in the main rotor figure 3- goes down and the pitch in the main rotor figure 3- goes up. With this mechanism, the same effect as the Hiller control can be obtained. When it is considered that the main rotor is rotated by 90 degrees (the main rotor in FIG. 3A is in the A position), the angle of the main rotor in FIG. 3 is lowered by moving the mixing lever in FIG. . With this mechanism, an effect similar to that of the bell control can be obtained. By doing so, the same stability and motility as the bell control or the hiller control can be obtained from external factors.

【Example】

 Regardless of the number or shape of the arms, mixing levers, etc., at a certain rotation angle, the inclination of one main rotor is changed to the pitch change of another main rotor, and the inclination of one main rotor is changed to the pitch change of another main rotor. The same effect can be obtained if the bell control, in which the inclination of the swash plate directly controls the main rotor pitch, can be performed at the rotation angle deviated therefrom by performing the Hiller control. In addition, it is possible to produce a helicopter with higher stability and mobility by applying it to an actual machine.

[Effect of the invention]

 In the present invention, the main rotor can be rotated stably by using a part of the main rotor from among the multiple main rotors, and the helicopter can be stably operated even when there are external factors such as wind. It made it possible to fly.

[Brief description of the drawings]

Fig. 1 Main rotor control mechanism for mixing bell control and Hiller control Swash plate Stabilizer Seesaw connecting stabilizers Mixing lever for mixing the movement of the seesaw and the inclination of the swash plate To control the pitch of the main rotor Pitch lever Main rotor Main rotor A Position when main rotor is rotated 90 degrees B Direction of nose

Fig. 2 Main rotor head swash plate for multiple main rotors

Fig. 3 Main rotor control mechanism for mixing bell control and Hiller control in the main rotor head for multiple main rotors Swash plate Main rotor used for Hiller control Seesaw Mixing lever fulcrum installed on the seesaw Operates the pitch of the main rotor Pitch lever for the main rotor Arm for transmitting the inclination of the main rotor to the seesaw Main rotor A 8 positions when rotated 90 degrees B Direction of the nose

FIG. 4 is a perspective view of a multi-layer rotor head provided with a Hiller control and a bell control.

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[Procedure amendment]

[Submission Date] June 25, 1999 (1999.6.2
5)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claim 1

[Correction method] Change

[Correction contents]

Claims (1)

[Utility model registration claims] In a main rotor head for a helicopter in which a plurality of main rotors are installed, an arm for transmitting the inclination of the main rotor and a seesaw for transmitting the movement of the main rotor to other main rotors. −
, And swash plate tilt and seesaw
A main rotor head for a helicopter equipped with a mixing lever (Fig. 3-) for mixing the inclination of the helicopter and using a part of the main rotor in the multi-sheet main rotor to enable control by bell control and Hiller control.