IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
UP-0631157
(2005-02-28)
|
등록번호 |
US-7628542
(2009-12-16)
|
우선권정보 |
JP-2004-237381(2004-08-17) |
국제출원번호 |
PCT/JP05/003313
(2005-02-28)
|
§371/§102 date |
20061229
(20061229)
|
국제공개번호 |
WO06/018915
(2006-02-23)
|
발명자
/ 주소 |
|
출원인 / 주소 |
- Kawasaki Jukogyo Kabushiki Kaisha
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
14 인용 특허 :
5 |
초록
▼
A squeeze film damper for a bearing and a vibration damping mechanism capable of damping the vibration of a rolling bearing are provided. The squeeze film damper is small in construction and can be easily made by mass production. The vibration damping mechanism is capable of damping both radial and
A squeeze film damper for a bearing and a vibration damping mechanism capable of damping the vibration of a rolling bearing are provided. The squeeze film damper is small in construction and can be easily made by mass production. The vibration damping mechanism is capable of damping both radial and axial vibrations. A bearing housing 15 is provided with a bearing holding bore 16 of a diameter greater than the outside diameter of the outer ring 14 of a bearing, and an oil hole 19 through which oil is supplied into the bearing holding bore 16. A vibration damping mechanism 1 is formed by inserting a thin, flat sheet 17 provided with slits into an annular space formed between the inner wall of the bearing holding bore 16 and the outside surface of a bearing held in the bearing holding bore 16 so as to surround the bearing. Parts of the thin, flat sheet extending between the adjacent slits serve as elastic beams. The elastic beams center the bearing and support the centered bearing elastically. The vibration of the bearing is damped by the squeeze film effect of an oil film formed by supplying oil into the annular space.
대표청구항
▼
The invention claimed is: 1. A bearing vibration damping mechanism comprising: a bearing; a bearing housing provided with a bearing holding bore having a diameter greater than an outside diameter of the bearing; and a thin, flat sheet provided with a plurality of slits, wherein; the bearing is put
The invention claimed is: 1. A bearing vibration damping mechanism comprising: a bearing; a bearing housing provided with a bearing holding bore having a diameter greater than an outside diameter of the bearing; and a thin, flat sheet provided with a plurality of slits, wherein; the bearing is put in the bearing holding bore so that the bearing may not move axially out of the bearing holding bore and an annular space is formed around the bearing to permit radial movement of the bearing; the thin, flat sheet is inserted into the annular space so as to extend circumferentially, and parts of the thin, flat sheet extending between adjacent slits have opposite ends resting on a side wall of the bearing holding bore and serve as elastic beams in contact with the bearing to support the bearing elastically and to dampen vibration of the bearing; and the bearing housing is provided with an oil hole through which oil is supplied into the bearing holding bore, oil is supplied into the annular space to form an oil film in the annular space. 2. The bearing vibration damping mechanism according to claim 1, wherein a outer circumference of the bearing is a cylindrical outer circumference of a outer ring of the bearing. 3. The bearing vibration damping mechanism according to claim 2, wherein the thin, flat sheet is a rectangular sheet, and the plurality of slits are formed widthwise of the thin, flat sheet. 4. The bearing vibration damping mechanism according to claim 3, wherein the thin, flat sheet is provided with at least one longitudinal oil passage opening extending along a longitudinal axis of the thin, flat sheet, and each of the slits coinciding with the oil passage opening is divided into two partial slits extending respectively on a opposite lateral side of the oil passage opening. 5. The bearing vibration damping mechanism according to claim 3, wherein the thin, flat sheet is provided with at least one longitudinal slot extending along a longitudinal axis of the thin, flat sheet, and each of the slits coinciding with the longitudinal slot is divided into two partial slits extending respectively on a opposite lateral side of the longitudinal slot. 6. The bearing vibration damping mechanism according to claim 1, wherein a outer circumference of the bearing is a conical outer circumference of a outer ring of the bearing. 7. The bearing vibration damping mechanism according to claim 6, wherein the thin, flat sheet has a fan-shape resembling a part of a circular ring having a uniform width, and the plurality of slits extend radially. 8. The bearing vibration damping mechanism according to claim 1, wherein a outer circumference of the bearing is conical outer circumference of an annular member put on a outer ring of the bearing. 9. The bearing vibration damping mechanism according to claim 8, wherein the annular member has one conical outer surface. 10. The bearing vibration damping mechanism according to claim 1, wherein an annular groove through which grease flows is formed so as to surround the annular space. 11. The bearing vibration damping mechanism according to claim 1, wherein a flange is formed at an end of the bearing housing to retain the bearing in place. 12. The bearing vibration damping mechanism according to claim 11, wherein a discharge hole for adjusting discharge of oil or grease is formed in the flange. 13. A bearing vibration damping mechanism comprising: a bearing; a bearing housing provided with a bearing holding bore having a diameter greater than an outside diameter of the bearing; and a thin, flat sheet provided with a plurality of openings that are formed in rows widthwise of the thin, flat sheet, wherein: the bearing is put in the bearing holding bore so that the bearing may not move axially out of the bearing holding bore and an annular space is formed around the bearing to permit radial movement of the bearing; the thin, flat sheet is inserted into the annular space so as to extend circumferentially and parts of the thin, flat sheet extending between adjacent openings have opposite ends resting on a side wall of the bearing holding bore and serve as elastic beams in contact with the bearing to support the bearing elastically and to dampen vibration of the bearing; and the bearing housing is provided with an oil hole through which oil is supplied into the bearing holding bore, oil is supplied into the annular space to form an oil film in the annular space.
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