Title:
組合せ玉軸受、及び主軸装置、並びに工作機械
Document Type and Number:
Japanese Patent JP6565454
Kind Code:
B2
Abstract:
A front bearing (40) of the main spindle device (M) is configured such that two rows of angular ball bearings (41, 51, 42, 52) with contact angles in the same direction are arranged back to back. The angular ball bearings (41, 51, 42, 52) all have equal inner diameters, the angular ball bearings (41, 51, 42, 52) having contact angles in the same direction have equal outer diameters to each other, and the angular ball bearings (41, 51, 42, 52) having contact angles in different directions have different outer diameters from one another. In addition, with respect to at least the angular ball bearings (42, 52) having the larger outer diameters, the angular ball bearing (42) positioned on the axially outer side is set to have a larger ball diameter and contact angle than the angular ball bearing (52) positioned on the axially inner side.
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Inventors:
Miaki Katsuno
Shoichiro Oguri
Shoichiro Oguri
Application Number:
JP2015155270A
Publication Date:
August 28, 2019
Filing Date:
August 05, 2015
Export Citation:
Assignee:
Nippon Seiko Co., Ltd.
International Classes:
B23B19/02; F16C19/16; F16C19/56; F16C23/06
Domestic Patent References:
| JP2006307912A | ||||
| JP2006322496A | ||||
| JP2008133887A |
Attorney, Agent or Firm:
Patent business corporation glory patent office