To make two spring members holding a ball equally loaded at non-braking in an electrically-driven braking device which adopts a non-circulation type ball screw mechanism.SOLUTION: An electrically-driven braking device adjusts braking force of wheels by controlling, with an electric motor, pressing force of a friction member against a rotary member fixed to the wheel. The electrically-driven braking device comprises: a ball screw mechanism which converts rotational power of the electric motor into linear power of the friction member; and a controller which increases the pressing force in normal driving of the electric motor and reduces the pressing force in reverse driving of the electric motor. In the electrically-driven braking device, the ball screw mechanism includes a ball line whose both ends are held by two spring members. In a case where a rotation angle of the electric motor becomes equal to or greater than a prescribed angle in a period from a start to an end of electric conduction to the electric motor, the controller changes a rotation angle in a reverse direction further with respect to a reference angle shifting from a state where the pressing force is generated when driving the electric motor in the reverse direction, into a state where the pressing force is not generated.SELECTED DRAWING: Figure 5

    【課題】非循環型のボールねじ機構が採用される電動制動装置において、非制動時にボールを保持する2つのばね部材の負荷状態を均等にする。【解決手段】電動制動装置は、車輪に固定された回転部材に対する摩擦部材の押圧力を、電気モータによって制御して、車輪の制動力を調整するものであって、電気モータの回転動力を摩擦部材の直線動力に変換するボールねじ機構と、電気モータの正転駆動で押圧力を増加し、電気モータの逆転駆動で押圧力を減少するコントローラと、を備える。電動制動装置では、ボールねじ機構は、両端部が2つのばね部材で保持されるボール列を含む。コントローラは、電気モータへの通電を開始してから終了するまでの期間において、電気モータの回転角が所定角以上になる場合には、電気モータを逆転方向に駆動する際に押圧力が発生している状態から発生しなくなる状態に遷移する基準角よりも更に逆転方向に、回転角を変化させる。【選択図】図5


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    Title :

    ELECTRICALLY-DRIVEN BRAKING DEVICE OF VEHICLE


    Additional title:

    車両の電動制動装置


    Contributors:

    Publication date :

    2022-02-10


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B60T Bremsanlagen für Fahrzeuge oder Teile davon , VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF / F16H Getriebe , GEARING



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