摘要:
A fluid lubrication bearing apparatus which can stably produce high bearing performance is provided at low costs. Moreover, a method for producing a housing for hydrodynamic bearing apparatuses which can improve the accuracy of form of the housing of this type at low costs is provided.In forming a housing 7 which has a cylindrical shape and comprises a fixing face 7c for fixing the outer circumferential surface 8b of a bearing sleeve 8, and axial circulation grooves 7d for bringing both end faces 8c, Sd of the bearing sleeve 8 into circulation on the inner periphery by forging, a groove molding portion 18a2 is provided on the outer circumference of a rod 18 which serves as a forming mold for the inner periphery of the housing 7, and the circulation grooves 7d are formed by forging with this groove molding portion 18a2. Moreover, after a sealing face 107d and a cylindrical outer circumferential surface 107e provided on the outer periphery of the housing 107 are formed by forging, an inner circumferential surface 107c is formed by forging. Accordingly, the thrust bearing face 107a is finished to have the perpendicularity with respect to the inner circumferential surface 107c or outer circumferential surface 107e of 20 Mm or less. Moreover, the sealing face 107d is finished to have the coaxiality with respect to the inner circumferential surface 107c or outer circumferential surface 107e of 20 p.m or less. Moreover, the outer circumferential surface 107e is finished to have the coaxiality with respect to the inner circumferential surface 107c of 20 p.m or less.
摘要:
A fluid lubrication bearing apparatus which can stably produce high bearing performance is provided at low costs. Moreover, a method for producing a housing for hydrodynamic bearing apparatuses which can improve the accuracy of form of the housing of this type at low costs is provided.In forming a housing 7 which has a cylindrical shape and comprises a fixing face 7c for fixing the outer circumferential surface 8b of a bearing sleeve 8, and axial circulation grooves 7d for bringing both end faces 8c, 8d of the bearing sleeve 8 into circulation on the inner periphery by forging, a groove molding portion 18a2 is provided on the outer circumference of a rod 18 which serves as a forming mold for the inner periphery of the housing 7, and the circulation grooves 7d are formed by forging with this groove molding portion 18a2. Moreover, after a sealing face 107d and a cylindrical outer circumferential surface 107e provided on the outer periphery of the housing 107 are formed by forging, an inner circumferential surface 107c is formed by forging. Accordingly, the thrust bearing face 107a is finished to have the perpendicularity with respect to the inner circumferential surface 107c or outer circumferential surface 107e of 20 μm or less. Moreover, the sealing face 107d is finished to have the coaxiality with respect to the inner circumferential surface 107c or outer circumferential surface 107e of 20 μm or less. Moreover, the outer circumferential surface 107e is finished to have the coaxiality with respect to the inner circumferential surface 107c of 20 μm or less.
摘要:
A fluid bearing apparatus includes a housing 7 which has a cylindrical shape having a fixing face 7c for fixing the outer circumferential surface 8b of a bearing sleeve 8, and axial circulation grooves 7d for bringing both end faces 8c, 8d of the bearing sleeve 8 into circulation on the inner periphery by forging. A groove molding portion 18a2 is provided on the outer circumference of a rod 18 which serves as a forming mold for the inner periphery of the housing 7, and the circulation grooves 7d are formed by forging with this groove molding portion 18a2. Moreover, after a sealing face 107d and a cylindrical outer circumferential surface 107e provided on the outer periphery of the housing 107 are formed by forging, an inner circumferential surface 107c is formed by forging.
摘要:
A housing for a fluid lubrication bearing apparatus is produced. The housing has a cylindrical shape whose inner periphery having a fixing face to which an outer circumferential surface of a bearing sleeve is to be fixed. The method includes providing a forging mold having a groove molding portion extending parallel to a direction of a stroke of said mold and a face molding portion having a convex cylindrical shape on an outer periphery of the forging mold for forming the fixing face of the housing. The method further includes forming the housing with the forging mold, while forging circulation grooves and the fixing face simultaneously on the inner periphery of the housing with the groove molding portion and the face molding portion of the forging mold.
摘要:
A method for producing a housing for a hydrodynamic bearing apparatus includes forming a housing 7 which has a cylindrical shape and which includes a fixing face 7c for fixing the outer circumferential surface 8b of a bearing sleeve 8, and axial circulation grooves 7d for bringing both end faces 8c, 8d of the bearing sleeve 8 into circulation on the inner periphery. The method includes providing a groove molding portion 18a2 on the outer circumference of a rod 18 which serves as a forming mold for the inner periphery of the housing 7, and forming the circulation grooves 7d of the housing by forging with the groove molding portion 18a2 of the mold. Moreover, after a sealing face 107d and a cylindrical outer circumferential surface 107e provided on the outer periphery of the housing 107 are formed by forging, an inner circumferential surface 107c is formed by forging.
摘要:
A method for producing a housing for a hydrodynamic bearing apparatus includes forming a housing 7 which has a cylindrical shape and which includes a fixing face 7c for fixing the outer circumferential surface 8b of a bearing sleeve 8, and axial circulation grooves 7d for bringing both end faces 8c, 8d of the bearing sleeve 8 into circulation on the inner periphery. The method includes providing a groove molding portion 18a2 on the outer circumference of a rod 18 which serves as a forming mold for the inner periphery of the housing 7, and forming the circulation grooves 7d of the housing by forging with the groove molding portion 18a2 of the mold. Moreover, after a sealing face 107d and a cylindrical outer circumferential surface 107e provided on the outer periphery of the housing 107 are formed by forging, an inner circumferential surface 107c is formed by forging.
摘要:
A shaft member for hydrodynamic bearing apparatuses which can restore the pressure balance in a thrust bearing gap formed on both axial sides of the flange portion in an early stage is provided at low costs.A shaft material 10 integrally having a shaft portion 11 and a flange portion 12 is formed as a through-hole 19 opening to its both end faces 12a, 12b on the flange portion 12 of the shaft material 10 is formed in a common forging step. As a result, the through-hole 29 is formed to open to the inner diameter side of these bearing gap W1, W2 avoiding thrust bearing gaps W1, W2 formed on both end faces of the flange portion 22 of the shaft member 2 as a finished product.
摘要:
The disclosure discloses a toy building block that can create a cubic article by assembling a unit piece, the unit piece comprising: a plate body made of a flexible material in which an outer profile of the plate body is formed by a pair of upper and lower short sides curved inward and a pair of right and left long sides curved inward; projections provided at a corner portions located on one of diagonal lines of the plate body on a plate face of the plate body at a right angle; and through holes into which the projections can be fitted, the through holes being provided at the corner portions located on the other diagonal line of the plate body.
摘要:
The present invention provides compounds represented by formula (I) and pharmaceutically acceptable salts and solvates thereof: wherein X represents CH or N; Z represents —O—, —NH— or —C(═O)—; R and R′ represent a hydrogen atom, hydroxyl, a halogen atom, optionally substituted alkyl, optionally substituted alkenyl optionally substituted alkoxy, amino, aminocarbonyl, or an optionally substituted heterocyclic group; and A represents an optionally substituted specific carbocyclic or heterocyclic group. The compounds according to the present invention have excellent TGFβ inhibitory activity.
摘要:
A motor 1 for traveling is attached to a frame 6 of a vehicle via mounts 3, 4 and 5 absorbing vibration. An air compressor 10 and an air compressor driving motor 11 are attached with respect to said motor 1 for traveling. The mounts 3, 4 and 5 are placed to be shared mounts absorbing vibration of the motor 1 for traveling, the air compressor 10 and the air compressor driving motor 11.