To provide a driving device and a parking brake having the driving device, capable of preventing breakage of an engagement structure between a shaft member and a nut member by suppressing shaft deflection in a moving direction (axial direction) in a nut member, and occurrence of backlash to the shaft member.SOLUTION: In a spline nut member 40, an opening portion 41 (basic end-side opening portion 41A) at a basic end side (rear side) is extended to a male spline portion 32, a spline nut member 40 is rotated in an axial direction by rotation of a driving portion 10 so that the shaft member 30 is rotated, and a housing space 46 for housing a basic end portion 52 of an engagement nut member 50 when the engagement nut member 50 is moved to the basic end side (rear side) in the axial direction by the rotation of the shaft member 30, is formed between an inner peripheral face of a penetration portion 42 in the spline nut member 40 and the male spline portion 32 of the shaft member 30.SELECTED DRAWING: Figure 4
【課題】ナット部材における移動方向(軸方向)に対する軸ブレや、軸部材に対するガタツキの発生を抑制し、軸部材及びナット部材間の螺合構造の破損の防止を図ることができる駆動装置及び駆動装置を有するパーキングブレーキを提供する。【解決手段】スプラインナット部材40は、基端側(後側)の開口部41(基端側開口部41A)が雄スプライン部32上まで延び、駆動部10の回転によってスプラインナット部材40が軸周り方向に回転して軸部材30が回転し、スプラインナット部材40における貫通部42の内周面と、軸部材30における雄スプライン部32との間には、螺合ナット部材50が軸部材30の回転によって軸方向の基端側(後側)に移動したときに、螺合ナット部材50の基端部52が収容される収容空間46が設けられている。【選択図】図4
DRIVING DEVICE AND PARKING BRAKE DEVICE HAVING DRIVING DEVICE
駆動装置及び駆動装置を有するパーキングブレーキ装置
2019-05-30
Patent
Electronic Resource
Japanese
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