Lubrication structure for rolling bearing

A machine that uses a rolling bearing and has a lubrication structure for the rolling bearing, wherein the lubrication structure comprises:

• a lubrication oil hole that radially penetrates through an inner ring of the rolling bearing;
• an oil accumulating room of which rotational axis is the same as a rotational axis of the rolling bearing and that accumulates lubrication oil by using a centrifugal force thereof, wherein the oil accumulating room forms an annular space that extends in a circumferential direction around a central shaft;
• a lubrication oil supplying path that communicates with the oil accumulating room and the lubrication oil hole;
• and
• a fin member that is installed in the oil accumulating room so only one end portion of the fin member in an axial direction is fixed on an inner surface of the oil accumulating room, and the fin member causes lubrication oil to follow rotation of the oil accumulating room so that lubrication oil is forcibly rotated,
• wherein an oil supplying pressure generated by the centrifugal force causes the lubrication oil in the oil accumulating room to be supplied to an inside of the rolling bearing via the lubrication oil supplying path and the lubrication oil hole.

A lubrication structure for a rolling bearing, comprising:

• a first lubrication oil hole that radially penetrates through a first inner ring of the rolling bearing;
• a second lubrication oil hole that radially penetrates through a second inner ring of the rolling bearing, wherein the first inner ring and the second inner ring are disposed along a central axis of a shaft;
• an oil accumulating room having a rotational axis that is the same as a rotational axis of the rolling bearing;
• a lubrication oil supplying path that communicates with the oil accumulating room, the first lubrication oil hole and the second lubrication oil hole;
• and
• a fin member that is installed in the oil accumulating room and causes lubrication oil to follow rotation of the oil accumulating room so that lubrication oil is forcibly rotated, wherein the fin member is fixed on an outer surface of a shaft end nut of the shaft so as to extend in an axial direction and in a radial direction, and
• wherein an oil supplying pressure generated by the centrifugal force causes lubrication oil in the oil accumulating room to be supplied to an inside of the rolling bearing via the lubrication oil supplying path, the first lubrication oil hole and the second lubrication oil hole.

A supercharger comprising a lubrication structure for a rolling bearing, wherein the lubrication structure comprises:

• a first lubrication oil hole that radially penetrates through a first inner ring of the rolling bearing;
• a second lubrication oil hole that radially penetrates through a second inner ring of the rolling bearing, wherein the first inner ring and the second inner ring are disposed along a central axis of a shaft;
• an oil accumulating room having a rotational axis that is the same as a rotational axis of the rolling bearing;
• a lubrication oil supplying path that communicates with the oil accumulating room, the first lubrication oil hole and the second lubrication oil hole;
• and
• a fin member that is installed in the oil accumulating room and causes lubrication oil to follow rotation of the oil accumulating room so that lubrication oil is forcibly rotated, wherein the fin member is fixed on an outer surface of a shaft end nut of the shaft so as to extend in an axial direction and in a radial direction, and
• wherein an oil supplying pressure generated by the centrifugal force causes lubrication oil in the oil accumulating room to be supplied to an inside of the rolling bearing via the lubrication oil supplying path, the first lubrication oil hole and the second lubrication oil hole.