Title:
磁性流体シール付き軸受
Document Type and Number:
Japanese Patent JP5797600
Kind Code:
B2
Abstract:
Provided is a bearing with a magnetic fluid seal reliably maintaining sealing of a rolling element section in the bearing and having a structure ensuring high productivity. In a bearing with a magnetic fluid seal according to the present invention, a plurality of rolling elements are interposed between an inner ring and an outer ring, and a ring-shaped magnet is arranged at an opening side of the inner and outer rings so as to retain magnetic fluid for sealing the plurality of rolling elements, and wherein the ring-shaped magnet is magnetized such that magnetic poles are oriented in an axial direction, the bearing comprising: a ring-shaped pole plate arranged so as to be in contact with an axially outer side surface of the ring-shaped magnet; outer-ring-side magnetic fluid retained at least between the outer ring and the ring-shaped pole plate; and inner-ring-side magnetic fluid retained at least between the inner ring and the ring-shaped magnet; wherein the ring-shaped pole plate is press-fitted to the inner ring, and a step gap is formed between the ring-shaped magnet and the step, and wherein the inner-ring-side magnetic fluid is disposed in the step gap.
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Inventors:
Takee Ohara
Application Number:
JP2012100551A
Publication Date:
October 21, 2015
Filing Date:
April 26, 2012
Export Citation:
Assignee:
Globeride Co., Ltd.
International Classes:
F16C33/82; F16C19/06; F16C33/78
Domestic Patent References:
| JP2004251293A | ||||
| JP5065922A | ||||
| JP4029680A | ||||
| JP57033222A |
Attorney, Agent or Firm:
Koji Mizuno
Ryo Matsushita
Ryo Matsushita
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