# US 2010/0166346 A1 · Dynamic bearing device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2010/0166346 A1 - Document ID: US20100166346A1 - Status: Published application - Kind: A1 - Application number: 12/721,053 - Filed: 2010-03-10 - Published: 2010-07-01 - Earliest claimed: 2004-05-26 - Assignees: Ntn Corporation - Inventors: Masaharu HORI; Tetsuya KURIMURA - Web page: https://patentgrep.com/patent/US20100166346A1 ## CPC - G11B 19/2009: {Turntables, hubs and motors for disk drives; Mounting of motors in the drive (means for clamping of disk to turntable G11B17/022 and subgroups)} - F16C 17/107: {with at least one surface for radial load and at least one surface for axial load} - F16C 33/107: {Grooves for generating pressure} - F16C 33/745: {by capillary action} - H02K 5/1675: {radially supporting the rotary shaft at only one end of the rotor (H02K5/1677 takes precedence)} - F16C 2370/12: Hard disk drives or the like - Y10T 29/49645: Thrust bearing - G11B: INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER (recording measured values in a way that does not require playback through a transducer G01D9/00; recording or playback apparatus using mechanically marked tape, e.g. punched paper tape, or using unit records, e.g. punched or magnetically marked cards G06K; transferring data from one type of record carrier to another G06K1/18; circuits for coupling output of reproducer to radio receiver H04B1/20; gramophone pick-ups or like acoustic electromechanical transducers or circuits therefor H04R) - F16C: SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS - H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53}) - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract A dynamic bearing device is provided, which can prevent abrasion powder generated when a sealing member is pushed into an inner circumference of a housing from entering the housing. A sealing member is inserted into an inner circumference of an opening of a housing with an adhesive interposed therebetween The adhesive moving forward in a pushing direction of the sealing member is retained by a capillary action in a lower tapered space between an outer circumference of the sealing member and the inner circumference of the housing. Abrasion powder is captured by the adhesive in the tapered space so as to be confined in the adhesive as a result of the setting of the adhesive. ## Claims ### Claim 1 A dynamic bearing device comprising: a housing; a bearing sleeve fixed to an inner circumference of the housing; a rotary member including a shaft portion inserted into the bearing sleeve; a bottom member for closing an opening of the housing; a radial bearing portion for generating a pressure in a radial direction in a radial bearing gap between the bearing sleeve and the shaft portion by a dynamic pressure effect of a lubricating fluid; and a thrust bearing portion for generating a pressure in a thrust direction in a thrust bearing gap formed between the rotary member and the housing by a dynamic pressure effect of the lubricating fluid, wherein the bottom member is pushed into the opening of the housing so as to be fixed thereto with an adhesive interposed therebetween. ### Claim 2 (depends on 1) A dynamic bearing device according to claim 1, having an inner tapered space for retaining the adhesive between the outer circumference of the bottom member and the inner circumference of the housing, the inner tapered space being adjacent to a press-fit part of the bottom member on the inner side of the housing. ### Claim 3 (depends on 1) A dynamic bearing device according to claim 1, having an outer tapered space for retaining the adhesive between the outer circumference of the bottom member and the inner circumference of the housing, the outer tapered space being adjacent to a press-fit part of the bottom member on the outer side of the housing. ### Claim 4 (depends on 1) A dynamic bearing device according to claim 1, having an inner tapered space, for retaining the adhesive, being adjacent to a press-fit part of the bottom member on the inner side of the housing so as to retain the adhesive and the outer tapered space, for retaining the adhesive, being adjacent to the press-fit part of the bottom member on the outer side of the housing between the outer circumference of the bottom member and the inner circumference of the housing. ### Claim 5 (depends on 3) A dynamic bearing device according to claim 3, having a step for the inner circumference of the housing, the step being located in the outer tapered space to face the exterior of the housing. ### Claim 6 (depends on 4) A dynamic bearing device according to claim 4, having a step for the inner circumference of the housing, the step being located in the outer tapered space to face the exterior of the housing. ### Claim 7 (depends on 2) A dynamic bearing device according to claim 2, wherein a tapered surface for forming the tapered space is provided on the outer circumference of the bottom member. ### Claim 8 (depends on 3) A dynamic bearing device according to claim 3, wherein a tapered surface for forming the tapered space is provided on the outer circumference of the bottom member. ### Claim 9 (depends on 4) A dynamic bearing device according to claim 4, wherein a tapered surface for forming the tapered space is provided on the outer circumference of the bottom member. ### Claim 10 (depends on 5) A dynamic bearing device according to claim 5, wherein a tapered surface for forming the tapered space is provided on the outer circumference of the bottom member. ### Claim 11 (depends on 6) A dynamic bearing device according to claim 6, wherein a tapered surface for forming the tapered space is provided on the outer circumference of the bottom member. ### Claim 12 (depends on 1) A method of fabricating the dynamic pressure bearing according to claim 1, comprising the steps of: applying an adhesive onto an inner circumference of a housing; and pushing a bottom member into the inner circumference of the housing, to which the adhesive has been applied.