Patent ID: 9133922
Filing Date: 2015-09-15
Classification: F16H,Y10T

Abstract:
1. A ball screw device comprising: an elongated screw member including a helical groove formed therein, a first nut member and a second nut member each including a screw hole formed therein for receiving and engaging with said screw member, and each including a helical groove aligned with said helical groove of said screw member for forming a ball guiding passage between said first and said second nut members and said screw member, a first deflecting member and a second deflecting member each including a bore formed therein for receiving and engaging with said screw member, and disposed on end portions of said first nut member and secured to said first nut member with fasteners, said first and said second deflecting members each including at least one deflecting pathway formed therein and communicating with said helical groove of said first nut member for forming an endless ball guiding passage in said ball screw device, said second deflecting member including a notch formed therein, a third deflecting member and a fourth deflecting member each including a bore formed therein for receiving and engaging with said screw member, and disposed on end portions of said second nut member and secured to said second nut member with fasteners, said third and said fourth deflecting members each including at least one deflecting pathway formed therein and communicating with said helical groove of said second nut member for forming an endless ball guiding passage in said ball screw device, said third deflecting member including a notch formed therein, a plurality of bearing members engaged in said ball guiding passage between said first and said second nut members and said screw member, and a load applying device disposed on said screw member and disposed between said first and said second nut members and applying a load onto said first and said second nut members in order to force and move said first and said second nut members away from each other and in order to apply a force onto said ball bearing members, said load applying device including a first ring member and a second ring member disposed between said second deflecting member of said first nut member and said third deflecting member of said second nut member, said first and said second ring members of said load applying device being contacted with each other, and said first ring member including a projection extended outwardly therefrom and engaged through said notch of said second deflecting member and engaged with said first nut member, and said second ring member including a projection extended outwardly therefrom and engaged through said notch of said third deflecting member and engaged with said second nut member.