Patent ID: 8525380
Filing Date: 2013-09-03
Classification: H02K

Abstract:
1. A vacuum mechanical rotation-transmitting apparatus adapted to be mounted on a chamber-defining wall of a hollow member, the hollow member defining a vacuum chamber, said vacuum mechanical rotation-transmitting apparatus comprising: a spacer member adapted to be connected fixedly to said chamber-defining wall and including a spacer end wall and a spacer surrounding wall extending from a periphery of said spacer end wall and adapted to extend toward the chamber-defining wall, said spacer surrounding wall cooperating with said spacer end wall to define an accommodating space; an input mechanism including an input shaft assembly sleeved rotatably on said spacer member, and a plurality of first magnetic units disposed on said input shaft assembly, said input shaft assembly including an input body surrounding said spacer member and permitting said first magnetic units to be mounted thereon, and an input shaft extending from an end of said input body in a direction away from said hollow member; and an output mechanism including an output shaft assembly and a plurality of second magnetic units disposed on said output shaft assembly, said output shaft assembly including an output body disposed within said accommodating space of said spacer member, and an output shaft extending from said output body and adapted to extend into the vacuum chamber through the chamber-defining wall, said second magnetic units being mounted on said output body and aligned respectively with said first magnetic units such that, when said input shaft assembly is rotated relative to said spacer member, a magnetic force is produced between said first magnetic units and said second magnetic units to allow for transmission of rotation of said input shaft assembly to said output shaft assembly; wherein said input body has a body end wall adjacent to said spacer end wall, and a body surrounding wall extending from a periphery of said body end wall toward said hollow member and disposed spacedly around said spacer surrounding wall, said first magnetic units being spaced apart from each other and disposed on said body surrounding wall; wherein said body surrounding wall has a plurality of first projections that are angularly spaced apart from each other and that extend axially of said body surrounding wall, so as to define a plurality of first receiving grooves each disposed between two adjacent ones of said first projections, each of said first projections having two first ribs extending respectively into two adjacent ones of said first projections, said first magnetic units being disposed respectively within said first receiving grooves, each of said first magnetic units including a plurality of first magnets each having two first slots engaging respectively two adjacent ones of said first ribs of said first projections; wherein said input mechanism further includes a fixing ring disposed at one end of said body surrounding wall, and a plurality of fixing plates corresponding respectively to said first receiving grooves and connected to said body end wall, said first magnetic units being confined between said fixing ring and said fixing plates.