Bearing structure for turbocharger
AssigneeToyota Jidosha Kabushiki Kaisha
InventorOsamu Maeda
Life of this patent
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Abstract
A bearing structure for a turbocharger includes a center housing, which is arranged between a turbine wheel and a compressor wheel and has an insertion hole, a rotary shaft, which is inserted through the insertion hole and couples the turbine wheel to the compressor wheel, a pair of bearing members, which is press-fitted into the gap between the rotary shaft and the center housing and rotationally supports the rotary shaft, and a restriction member, which is held by the rotary shaft at a position between the bearing members and restricts the movement of the rotary shaft in the thrust direction by engaging with the bearing members. The bearing members have engagement surfaces engaging with the restriction member. An oil supply opening is formed in each of the engagement surfaces.
Claims8
A bearing structure for a turbocharger, comprising:
- a center housing that is arranged between a turbine wheel and a compressor wheel and has an insertion hole;
- a rotary shaft inserted through the insertion hole to couple the turbine wheel and the compressor wheel together;
- a pair of bearing members that are press-fitted in a gap between the rotary shaft and the center housing and rotationally support the rotary shaft;
- and
- a restriction member that is held by the rotary shaft at a position between the two bearing members and restricts movement of the rotary shaft in a thrust direction by being engaged with the bearing members, wherein
- each of the bearing members has an engagement surface engaged with the restriction member, and
- an oil supply port is formed in each of the engagement surfaces.
Dependencies are inferred from the claim text.