To provide a traction drive type strong accelerator capable of providing a desired acceleration ratio and suitable for transmitting high speed rotation power.
This supercharger is equipped with a traction drive accelerator A provided with a sun shaft 11, an outer ring 12 arranged concentrically with the sun shaft 11, and a plurality of rollers 21 and 22 radially arranged in a multi-stage state in a friction contacting state between the outer peripheral face of the sun shaft 11 and the inner peripheral face of the outer ring 12. The rotation power from an input shaft 29 is accelerated through the input shaft 29, the ring holder section 33 of the input shaft 29 and the outer ring 12 and is transmitted to an output shaft 27 to rotate an impeller 24 of a centrifugal compressor at a high speed.
MAKINO TOMOAKI
UTSUNOMIYA SATOSHI
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