The power transmission device includes: a housing; a ball screw device having a nut, a screw shaft, and a plurality of balls; a pulley device having a driving pulley driven by power transmitted from the power source, a driven pulley fixed to the nut, and a transmission belt provided across the outer peripheral surfaces of the driving pulley and the driven pulley; a first bearing and a second bearing provided between the housing and the nut and arranged in a central axis direction parallel to the central axis of the nut; and a preload applying member that applies preload to the first bearing and the second bearing. The first bearing and the second bearing are disposed facing each other on both sides of the driven pulley, each of the first bearing and the second bearing includes an outer ring fitted to the housing, and the outer rings are pressed toward the driven pulley by the preload applying member and spaced apart from the driven pulley to form a gap with the driven pulley.
动力传递装置包括:壳体;滚珠丝杠装置,其具有螺母、丝杠轴和多个滚珠;带轮装置,其具有受到从动力源传递来的动力进行驱动的驱动带轮、固定于螺母的从动带轮、和跨设于驱动带轮和从动带轮的外周面的传动带;第一轴承及第二轴承,其设置于壳体与螺母之间,且在与螺母的中心轴平行的中心轴方向上排列;以及预压施加部件,其对第一轴承及第二轴承施加预压。第一轴承及第二轴承配置为面对面配置,且分别配置于从动带轮的两侧,第一轴承及第二轴承各自包括嵌合于壳体的外圈,外圈被预压施加部件朝向从动带轮按压,且与从动带轮隔开而在与从动带轮之间形成间隙。
Power transmission device
动力传递装置
2022-06-17
Patent
Elektronische Ressource
Chinesisch
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