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    • 2. 发明专利
    • VARIABLE PITCH PROPELLER SYSTEM
    • JPS6432996A
    • 1989-02-02
    • JP16865588
    • 1988-07-06
    • UNITED TECHNOLOGIES CORP
    • ARUBAATO JIEI UIROSUTEKUMIRAADO JII MEIYO
    • B63H3/06B64C11/44
    • PURPOSE: To reduce the noise and the maintenance cost, in a transmission mechanism of propeller pitch control information, by providing between a stationary plate and a rotating plate a communication link in which a capacitor on one side forms a high potential signal path and that on the other side forms a low potential return path. CONSTITUTION: A capacitor link 34 is constituted in such a way that it is protected by shrouds 76, 78, 82 between the stationary side 12 and the rotating side 16 of a propeller system 10 and comprises a high potential capacitor 64 and a low potential capacitor 66. In each of the capacitors 64, 66, a pair of ring-shaped plates 68, 70 are coaxially arranged with the rotating center 71 of a hub as the center. The control signal of high potential is sent between the plates 68 via an electrode 72, and the feedback signal of low potential is sent between the plates 70 fitted by bolts and nuts 74, by means of capacitance coupling. Thus, as compared with the conventional control information transmitting mechanism having a brush and a slip ring, noise and maintenance cost can be remarkably reduced.
    • 4. 发明专利
    • 推力発生装置
    • JP2021146826A
    • 2021-09-27
    • JP2020047058
    • 2020-03-17
    • 日本精工株式会社
    • 熊谷 浩保郡司 大輔
    • B64C11/32B64C11/44B64C27/68B64D27/24B64C27/605
    • 【課題】回転翼を理想的な向きに簡単に高い精度で配列することができ、小型化および軽量化を実現することができる推力発生装置を提供する。 【解決手段】推力発生装置は、複数の回転翼を回転させる推力発生モータと、回転翼のピッチ角を変更するピッチ角変更モータと、ピッチ角変更モータの回転を直動軸の直線運動に変換する第1の運動変換部と、回転翼のピッチ角を変更する第2の運動変換部を備える。第2の運動変換部は、回転翼を支持する複数のグリップの内側端部が挿入される複数のスラスト軸受と、リング状の複数のスラストワッシャを備える。回転翼の回転時に、グリップにかかる遠心力がスラスト軸受に与えられる。スラスト軸受によって外側に押圧されたスラストワッシャは、ケースの外端壁の内面に接触して支持され、スラストワッシャの湾曲面がケースの円形孔の内周面に形成された湾曲面にフィットする。 【選択図】図18
    • 6. 发明专利
    • ROTOR BLADE FOR HELICOPTER
    • JPH08216997A
    • 1996-08-27
    • JP2677095
    • 1995-02-15
    • MITSUBISHI HEAVY IND LTD
    • YAMAGUCHI HITOSHI
    • B64C11/44B64C13/50B64C27/46B64C27/615
    • PURPOSE: To perform free, uniform, or local control of a pitch angle throughout a span direction according to an hourly state by a method wherein a skin in the vicinity of the rear edge of a blade is formed of a piezoelectric element and expandably at least in the direction of a chord. CONSTITUTION: A skin 2 having abundant flexibility of which a wing cross section consists togetherwith a spar 1a is arranged in such a manner to be coupled with the vicinity of the rear edge of a blade 1, namely, the rear upper and lower surfaces of the spar 1a being rigid, the skin 2 consisting of a resilient plate 3 and a piezoelectric element 4. The piezoelectric element 4 is formed of a square ceramics and a plurality of the piezoelectric elements arranged in a row-form manner in the direction of the span of the blade 1 and in the direction of a chord are arranged by mounting the piezoelectric elements on the upper surface (the surface) and the under surface (the back surface) of the resilient plate 3. By operating a charge pressure applier 5 in a direction in which the direction (y) of the piezoelectric element 4 on the upper surface side of the blade 1 is expanded and the direction (y) of the piezoelectric element 4 on the under surface side is contracted, the rear edge of the skin 2 is lowered and the blade 1 is brought into a rise pitch angle.
    • 7. 发明专利
    • CONTROLLER FOR ATTITUDE OF RADIO CONTROL HELICOPTER FOR HOBBY
    • JPH06190152A
    • 1994-07-12
    • JP35911792
    • 1992-12-25
    • SAKOMU KK
    • AKIYAMA MAMORUOGINO MASAMIOGUCHI TETSUO
    • A63H27/133A63H27/30A63H30/04B64C11/44B64C13/20
    • PURPOSE:To provide a controller capable of safely and simply remote-controlling a radio control helicopter. CONSTITUTION:This controller is used by mounting it on a radio control helicopter for a hobby together with an existing radio control receiver. In such a state, when the radio control helicopter is flying, an angular velocity detecting means detects angular velocity at the time when the body of the radio control helicopter rotates to the left and the right with a yaw axis as axis. An angle calculating means integrates detected angular velocity of the angular velocity detecting means and derives an angle at which the body of the radio control helicopter rotates to the left and the right with the yaw axis as axis. A manipulated variable determining means determines a manipulated variable of rudder servo based on a manipulated variable inputted by a manipulated variable input means, the detected angular velocity by the angular velocity detecting means, and the angle derived by the angle calculating means. A manipulated variable output means outputs the manipulated variable determined by its manipulated variable determining means to the rudder servo. As a result, in accordance with the manipulated variable, the rudder servo is operated.
    • 9. 发明专利
    • PITCH CONTROL DEVICE FOR VARIABLE PITCH PROPELLER
    • JPH0524585A
    • 1993-02-02
    • JP20865491
    • 1991-07-25
    • TOYOTA MOTOR CORP
    • MORIYA YOSHITO
    • B64C11/40B64C11/44
    • PURPOSE:To always properly control the pitch of a propeller by correcting a control signal on a difference in the computed number of revolutions of an engine during the steady flight state of an aircraft in which the pitch of the propeller is controlled on a difference between the number of revolutions of the engine and its target number of revolutions. CONSTITUTION:An engine speed detecting means 1 detects the number of revolutions of an engine to rotate a propeller, and a target engine speed setting means 2 sets the target number of revolutions of the engine on an output lever operating state. An engine speed difference computing means 3 computes a difference between the number of revolutions of the engine and its target number of revolutions, and a control signal sending means 4 sends a control signal to control the pitch of the propeller for making a pitch control mechanism 5 control the pitch. In this case, a steady flight state judging means 6 is provided, and when the flight state is fudged to be steady, a control signal value correcting means 7 corrects the value of the control signal basing on the above number of revolution difference. Thus the slippage of control quantity caused by a change with the passage of time in a hydraulic pressure actuator or the like can be corrected.