Rolling bearing device and oil supply unit

Patent metadata

Field	Value
Publication number	US-2018149200-A1
Application number	US-201715816669-A
Country	US
Kind code	A1
Filing date	Nov 17, 2017
Priority date	Nov 29, 2016
Publication date	May 31, 2018
Grant date	—

Abstract

A rolling bearing device includes: a bearing portion that has an inner ring, an outer ring, a plurality of balls interposed between the inner ring and the outer ring, and a cage that holds the plurality of balls; and an oil supply unit provided adjacent to the bearing portion in the axial direction. The oil supply unit has a pump configured to supply lubricating oil to the bearing portion. The pump has a pump body provided with a nozzle that discharges lubricating oil and a vibration element that vibrates the pump body.

First claim

What is claimed is:

1 . A rolling bearing device comprising:
a bearing portion that has an inner ring, an outer ring, a plurality of rolling elements interposed between the inner ring and the outer ring, and a cage that holds the plurality of rolling elements; and an oil supply unit provided adjacent to the bearing portion in an axial direction and having a pump configured to supply lubricating oil to the bearing portion, wherein the pump has a pump body provided with a nozzle that discharges lubricating oil and a vibration element that vibrates the pump body.

2 . The rolling bearing device according to claim 1 , wherein
the nozzle is constituted of a through hole formed in a wall portion of the pump body, and the nozzle opens in a side surface of the wall portion.

3 . The rolling bearing device according to claim 2 , wherein
the vibration element generates vibration in a direction that is orthogonal to the side surface of the wall portion.

4 . The rolling bearing device according to claim 2 , wherein
the vibration element generates vibration in a direction that is parallel to the side surface of the wall portion.

5 . The rolling bearing device according to claim 2 , wherein
the side surface of the wall portion is a surface that faces a part of an annular space formed between the inner ring and the outer ring of the bearing portion.

6 . The rolling bearing device according to claim 1 , wherein
the pump body has an oil chamber that is connected to the nozzle and that stores lubricating oil, and a piezoelectric element configured to discharge lubricating oil from the nozzle by varying a volume of the oil chamber, and the piezoelectric element also serves as the vibration element.

7 . An oil supply unit provided in a rotary device and configured to supply lubricating oil to an oil supply region of the rotary device that requires oil supply, the oil supply unit comprising:
a pump configured to supply lubricating oil, wherein the pump has a pump body provided with a nozzle that discharges lubricating oil and a vibration element that vibrates the pump body.

Assignees

• Jtekt Corp

Inventors

• Higashiyama Yoshimichi
• Naka Masami
• Sakazaki Tsukasa

Classifications

• F16C19/16

  with a single row of balls · CPC title

• F16C33/6659 Primary

  Details of supply of the liquid to the bearing, e.g. passages or nozzles · CPC title

• F16C2322/39

  General buildup of machine tools, e.g. spindles, slides, actuators · CPC title

• F16C2202/36

  Piezoelectric · CPC title

• F16C33/664

  Retaining the liquid in or near the bearing · CPC title