PROBLEM TO BE SOLVED: To provide a linear actuator structured to reduce gear noise which is generated by engaging a pinion gear that is rotated by a motor, and a driven gear that is engaged with the pinion gear.SOLUTION: A linear actuator 4 includes: a pinion shaft 45 that is connected coaxially with a motor shaft 42a; a driven gear 44 engaged with a pinion gear 45a that is formed in the pinion shaft 45; a nut 43 which is rotated together with the driven gear 44; and a feed screw mechanism for converting a rotary motion of the but 43 into a linear motion of a rod 40. The linear actuator 4 also includes: a connection part 45b where an outer peripheral surface of the motor shaft 42a is serration-coupled to an inner peripheral surface of a longitudinal hole formed in the pinion shaft 45; and pressure application means 70 for generating a pressure that acts in an axial direction between the motor shaft 42a and the pinion shaft 45 in the connection part 45b.SELECTED DRAWING: Figure 5

    【課題】モータで回転するピニオンギアと、ピニオンギアに噛合するドリブンギアと、の噛み合いで生じる歯打ち音を低減可能な構造のリニアアクチュエータを提供することを課題とする。【解決手段】モータ軸42aと同軸に連結されるピニオン軸45と、ピニオン軸45に形成されるピニオンギア45aと噛み合うドリブンギア44と、ドリブンギア44とともに回転するナット43と、ナット43の回転運動をロッド40の直線運動に変換する送りねじ機構と、を有するリニアアクチュエータ4とする。そして、モータ軸42aの外周面がピニオン軸45に形成される縦孔の内周面にセレーション結合する連結部45bと、連結部45bにおいてモータ軸42aとピニオン軸45の間で軸方向に作用する圧力を発生させる与圧手段70と、を備えることを特徴とする。【選択図】図5


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    Title :

    LINEAR ACTUATOR


    Additional title:

    リニアアクチュエータ


    Contributors:

    Publication date :

    2016-02-04


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    H02K Dynamoelektrische Maschinen , DYNAMO-ELECTRIC MACHINES / B60G VEHICLE SUSPENSION ARRANGEMENTS , Radaufhängungen und Federungen für Fahrzeuge / B62D MOTOR VEHICLES , Motorfahrzeuge / F16H Getriebe , GEARING



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