Spacer and electric supercharger
AssigneeToyota Jidosha Kabushiki Kaisha
InventorsTakahiro Sadamitsu, Makoto Takeyama
Life of this patent
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Abstract
A spacer is disposed between a rotor and a bearing of an electric supercharger to fix the rotor. The spacer has a tapered surface with a diameter decreasing toward the bearing in an outer circumferential surface of the spacer. An area of an end surface of the spacer on a rotor side is larger than an area of an end surface of the spacer on a bearing side. A balance correction part that corrects balance of the spacer is disposed inside a recess formed in the end surface. A region of the end surface located on an outer side of the recess relative to a central axis of the spacer constitutes a surface coming in contact with the rotor.
Claims10
A spacer that is disposed, to fix a rotor of an electric supercharger, between the rotor and a bearing disposed in a direction of a rotational axis of the rotor relative to the rotor, the spacer comprising a tapered surface with a diameter decreasing toward the bearing in an outer circumferential surface of the spacer, wherein
- an area of an end surface of the spacer on a rotor side is larger than an area of an end surface of the spacer on a bearing side,
- a balance correction part that corrects balance of the spacer is disposed inside a recess formed in the end surface of the spacer on the rotor side, and
- a region of the end surface located on an outer side of the recess relative to a central axis of the spacer constitutes a surface coming in contact with the rotor.
An electric supercharger in which a spacer is disposed, to fix a rotor, between the rotor and a bearing disposed in a direction of a rotational axis of the rotor relative to the rotor, the electric supercharger comprising:
- a housing that supports a shaft through the bearing and has an air flow passage;
- a turbine that is disposed inside the flow passage and fixed at a leading end of the shaft;
- and
- a stator that surrounds the rotor and is fixed to the housing, wherein
- an area of an end surface of the spacer on a rotor side is larger than an area of an end surface of the spacer on a bearing side,
- the spacer has a tapered surface with a diameter decreasing toward the bearing in an outer circumferential surface of the spacer,
- a balance correction part that corrects balance of the spacer is disposed inside a recess formed in the end surface of the spacer on the rotor side, and
- a region of the end surface located on an outer side of the recess relative to a central axis of the spacer constitutes a surface coming in contact with the rotor.
Dependencies are inferred from the claim text.