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1. WO2017154935 - ROLLING BEARING, BEARING UNIT FOR AIR TURBINE, AND AIR TURBINE HANDPIECE FOR DENTAL USE

Publication Number WO/2017/154935
Publication Date 14.09.2017
International Application No. PCT/JP2017/009102
International Filing Date 07.03.2017
IPC
F16C 33/78 2006.1
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
16ENGINEERING ELEMENTS OR UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
CSHAFTS; FLEXIBLE SHAFTS; MECHANICAL MEANS FOR TRANSMITTING MOVEMENT IN A FLEXIBLE SHEATHING; ELEMENTS OF CRANKSHAFT MECHANISMS; PIVOTS; PIVOTAL CONNECTIONS; ROTARY ENGINEERING ELEMENTS OTHER THAN GEARING, COUPLING, CLUTCH OR BRAKE ELEMENTS; BEARINGS
33Parts of bearings; Special methods for making bearings or parts thereof
72Sealings
76of ball or roller bearings
78with a diaphragm, disc, or ring, with or without resilient members
A61C 1/10 2006.1
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
CDENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
1Dental machines for boring or cutting
08Machine parts specially adapted for dentistry
10Straight hand-pieces
F16C 19/06 2006.1
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
16ENGINEERING ELEMENTS OR UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
CSHAFTS; FLEXIBLE SHAFTS; MECHANICAL MEANS FOR TRANSMITTING MOVEMENT IN A FLEXIBLE SHEATHING; ELEMENTS OF CRANKSHAFT MECHANISMS; PIVOTS; PIVOTAL CONNECTIONS; ROTARY ENGINEERING ELEMENTS OTHER THAN GEARING, COUPLING, CLUTCH OR BRAKE ELEMENTS; BEARINGS
19Bearings with rolling contact, for exclusively rotary movement
02with bearing balls essentially of the same size in one or more circular rows
04for radial load mainly
06with a single row of balls
F16J 15/3204 2016.1
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
16ENGINEERING ELEMENTS OR UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
JPISTONS; CYLINDERS; PRESSURE VESSELS IN GENERAL; SEALINGS
15Sealings
16between relatively-moving surfaces
32with elastic sealings, e.g. O-rings
3204with at least one lip
CPC
A61C 1/05
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
CDENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
1Dental machines for boring or cutting ; ; General features of dental machines or apparatus, e.g. hand-piece design
02characterised by the drive of the dental tools
05with turbine drive
A61C 1/10
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
CDENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
1Dental machines for boring or cutting ; ; General features of dental machines or apparatus, e.g. hand-piece design
08Machine parts specially adapted for dentistry
10Straight hand-pieces
A61C 1/12
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
CDENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
1Dental machines for boring or cutting ; ; General features of dental machines or apparatus, e.g. hand-piece design
08Machine parts specially adapted for dentistry
12Angle hand-pieces
A61C 1/181
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
CDENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
1Dental machines for boring or cutting ; ; General features of dental machines or apparatus, e.g. hand-piece design
08Machine parts specially adapted for dentistry
18Flexible shafts; Clutches or the like; ; Bearings or lubricating arrangements; Drives or transmissions
181Bearings or lubricating arrangements, e.g. air-cushion bearings
F03D 80/70
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
03MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
DWIND MOTORS
80Details, components or accessories not provided for in groups F03D1/00 - F03D17/00
70Bearing or lubricating arrangements
F05D 2240/54
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
05INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
DINDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
2240Components
50Bearings
54Radial bearings
Applicants
  • 日本精工株式会社 NSK LTD. [JP]/[JP]
Inventors
  • 中原 亨 NAKAHARA Toru
  • 山本 篤弘 YAMAMOTO Atsuhiro
  • 宮▲崎▼ 翔士 MIYAZAKI Shoshi
Agents
  • 特許業務法人栄光特許事務所 EIKOH PATENT FIRM, P.C.
Priority Data
2016-04330907.03.2016JP
2016-12914929.06.2016JP
Publication Language Japanese (ja)
Filing Language Japanese (JA)
Designated States
Title
(EN) ROLLING BEARING, BEARING UNIT FOR AIR TURBINE, AND AIR TURBINE HANDPIECE FOR DENTAL USE
(FR) PALIER DE ROULEMENT, UNITÉ DE PALIER DESTINÉE À UNE TURBINE À AIR, ET PIÈCE À MAIN DE TURBINE À AIR À USAGE DENTAIRE
(JA) 転がり軸受及びエアタービン用軸受ユニット並びに歯科エアタービンハンドピース
Abstract
(EN) An axial end of the outer peripheral surface of the inner ring of a rolling bearing of a bearing unit for an air turbine has a sloped surface, the diameter of which changes from large to small toward the downstream side in the direction in which compressed air is supplied. A seal member does not have a metallic core, consists only of an elastic material, and has a base which extends radially and an elastically deformable lip section which extends from the radially inner end of the base and which is sloped to the downstream side in the direction in which the compressed air is supplied. When the compressed air does not act, the sloped surface of the lip section, which is located on the upstream side in the direction in which the compressed air is supplied, is in contact with the sloped surface of the inner ring. When the compressed air acts, the area of contact between the sloped surface of the lip section, which is located on the upstream side in the direction in which the compressed air is supplied, and the sloped surface of the inner ring is smaller than in the case in which the compressed air does not act.
(FR) La présente invention concerne un palier de roulement, une unité de palier destinée à une turbine à air. Selon l'invention, une extrémité axiale de la surface périphérique externe de la bague interne d'un palier de roulement d'une unité de palier destinée à une turbine à air présente une surface inclinée, dont le diamètre change de grand à petit vers le côté aval dans la direction dans laquelle de l'air comprimé est délivré. Un élément d'étanchéité ne présente pas de cœur métallique, est constitué uniquement par un matériau élastique, et présente une base qui s'étend radialement et une section de lèvre élastiquement déformable qui s'étend à partir de l'extrémité radialement interne de la base et qui est inclinée vers le côté aval dans la direction dans laquelle l'air comprimé est délivré. Lorsque l'air comprimé n'agit pas, la surface inclinée de la section de lèvre, qui est située du côté amont dans la direction dans laquelle l'air comprimé est délivré, vient en contact avec la surface inclinée de la bague interne. Lorsque l'air comprimé agit, la surface de contact entre la surface inclinée de la section de lèvre, qui est située du côté amont dans la direction dans laquelle l'air comprimé est délivré, et la surface inclinée de la bague interne est plus petite que dans le cas où l'air comprimé n'agit pas.
(JA) エアタービン用軸受ユニットの転がり軸受における内輪外周面の軸端は、圧縮空気の供給方向下流側に向かうに従って大径から小径となる傾斜面を有する。シール部材は、芯金を持たず、弾性材料のみからなり、径方向に延びる基部と、基部の径方向内端から延び、圧縮空気の供給方向下流側に傾斜する弾性変形可能なリップ部と、を有する。圧縮空気が作用しないとき、リップ部の圧縮空気の供給方向上流側の傾斜面は内輪の傾斜面に接触する。圧縮空気が作用するとき、圧縮空気が作用しないときと比べてリップ部の圧縮空気の供給方向上流側の傾斜面と内輪の傾斜面との接触面積が小さくなる。
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