DISC BRAKE DEVICE

To provide a disc brake device which can restrain vibration generation as well as reduction in fatigue life.SOLUTION: The disc brake device comprises: a spindle 75 which is rotated by an electric motor; a shaft roller 35 which is moved by rotation of the spindle 75 and transmits torque of the electr...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: ASHIDA YOSHIAKI, TANIE HISAFUMI, ONO MASAHIKO
Format: Patent
Sprache:eng ; jpn
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Beschreibung
Zusammenfassung:To provide a disc brake device which can restrain vibration generation as well as reduction in fatigue life.SOLUTION: The disc brake device comprises: a spindle 75 which is rotated by an electric motor; a shaft roller 35 which is moved by rotation of the spindle 75 and transmits torque of the electric motor to a piston 18; a nut roller 34 which is disposed on radial direction outside of the shaft roller 35 and planetary rollers 42 which are provided between the nut roller 34 and the shaft roller 35. The shaft roller 35, on a radial inner peripheral side thereof, is provided with a shaft roller screw part 35a which engages with a spindle screw part 76 of the spindle 75. The shaft roller 35, on a radial outer peripheral side thereof, is provided with annulus groove parts 35b which engage with annulus crest parts 42a of the planetary rollers 42. The shaft roller screw part 35a and the annulus groove parts 35b are disposed in positions which do not overlap in radial direction perpendicularly intersecting with axis of rotation 50 of the spindle 75.SELECTED DRAWING: Figure 2 【課題】振動発生を抑制すると共に、疲労寿命低下を抑制することのできるディスクブレーキ装置を提供する。【解決手段】電動モータによって回転するスピンドル75と、スピンドル75の回転によって移動しピストン18に電動モータのトルクを伝達するシャフトローラ35と、シャフトローラ35よりも径方向外側に配置されるナットローラ34と、ナットローラ34とシャフトローラ35との間に設けられる遊星ローラ42とを備える。シャフトローラ35の径方向内周側にはスピンドル75のスピンドルねじ部76と噛み合うシャフトローラねじ部35aを設ける。シャフトローラ35の径方向外周側には遊星ローラ42の円環山部42aと噛み合う円環溝部35bを設ける。シャフトローラねじ部35aと、円環溝部35bは、スピンドル75の回転軸50と直交する径方向において重ならない位置に配置した。【選択図】図2