摘要:
An object of the present invention is to prevent abrasion powder from accumulating and stacking in pockets in a retainer of a roller bearing, thereby protecting the rollers from brinelling and loss of lubrication for extended life of the roller bearing. On an inner diameter surface of annular regions in the retainer, cutouts are formed from the retainer's axially outer side end surface toward an inner side. The cutout has an outer diametrical position on a more radially outer position than an outer diametrical end of the inner-side projection of the retainer. This improves an axial flow of lubricant oil from an inner diameter side of the retainer toward the cutout which is formed in the annular region, making it less likely that dust such as metal abrasion powder contained in the lubricant oil will stay at the inner-side projection of the pillar.
摘要:
A retainer includes two annular retaining plates combined with each other, and each having semispherical bulging portions arranged at predetermined intervals along a circumferential direction of the retainer. The semispherical bulging portions, which face each other, form a pocket having a ring-like shape, for retaining a ball. The pocket includes a ball non-contact portion formed in a ball facing surface of the pocket at a center portion in a pocket axial direction, the ball non-contact portion being defined by a recess extending in a pocket circumferential direction. The following relationship is set: A/(B+C)=0.70 to 0.90, where “A” represents a pocket circumferential length of the ball non-contact portion, “B” represents a diameter of the ball, and “C” represents a gap formed between the ball and the ball facing surface of the pocket.
摘要:
A rolling bearing comprising an inner ring, an outer ring, at least one row of rolling elements between a pair of raceways, each raceway provided on the respective inner ring and outer ring, and an annular housing comprising at least one part surrounding at least one of the rings. The outer ring comprises two separate parts. Each of the two parts of the outer ring defines one closed space with the housing. The ratio between the radius of one raceway and the diameter of the rolling elements is higher than 0:55.
摘要:
A porous compact impregnated with lubricant fits into an end cap in a fashion exposed in part to a turnaround passage to apply the lubricant around balls while the balls roll through the turnaround passage. The porous compact is placed in a concavity in an end cap major part and a slot rounded at opposite ends thereof is formed in an outside curved portion of the turnaround passage to communicate the concavity with the turnaround passage. An applicator nose of the porous compact is exposed to the turnaround passage through the slot. The balls while being guided along edges of the slot come into rolling-contact with the exposed surface of the porous compact to be coated with the lubricant.
摘要:
A rolling bearing includes an inner ring, an outer ring, and a plurality of rolling elements. A large number of inside dimples in which a liquid lubricant is retained and a large number of outside dimples in which a solid lubricant is retained are formed in at least one of an inner ring raceway surface and an outer ring raceway surface. The inside dimples are formed in a contact region at which the raceway surface contact the rolling elements or in a section of each non-contact region, the section being close to the contact region. The outside dimples are formed outside a portion in which the inside dimples are formed.
摘要:
An inner ring of an under race lubricated bearing assembly that includes an outer surface, an inner surface, and an inner race formed on the outer surface of the inner ring. A plurality of circumferentially spaced axial slots is formed on the inner surface of the inner ring, and a first set of circumferentially spaced partial circumferential slots is formed on the inner surface of the inner ring adjacent a first end of the inner ring. Each partial circumferential slot intersects at least one of the axial slots. The inner ring also includes a first set of radial holes, where each radial hole extends from the outer surface of the inner ring to one of the partial circumferential slots.
摘要:
By incorporating a pump for sucking and discharging lubricating oil in a tank for storing the lubricating oil on an outside of a rolling bearing, for example, on a spacer for an outer ring in a housing for accommodating the rolling bearing and a nozzle in which an lubricating oil outlet communicating with a discharging port of the pump to supply the lubricating oil discharged from the pump to the rolling bearing is opened in an annular-shaped space between a fixed ring and a rolling ring in the rolling bearing, a cost is reduced by using a general-purpose rolling bearing, and at the same time, external devices and pipes for a lubrication are not required wholly or partially and problems of a noise made by compressed air are eliminated.
摘要:
Provided is a spacer for a radial needle roller bearing that keeps dynamic torque of a double-row radial needle roller bearing low, while suppressing wear in areas of rubbing with adjacent members by causing there to be a film of oil having a proper amount of oil to exist in the areas of rubbing without excessive surface area. Concave sections that are recessed in a direction away from the adjacent members of the column sections 13a or rim sections 12 are formed in the outside surfaces in the radial direction and/or circumferential direction of the column sections 13a, and/or in the outside surfaces in the radial and/or axial direction of the rim sections 12, and preferably radial concave sections 22 having bottom and that are recessed toward the inside in the radial direction are formed in the outside surfaces in the radial direction of the column sections 13a.
摘要:
A structure (200) for containing a volume of lubricant additive gel (10) which is disposed within a mechanical system, in close proximity to a wear critical surface, and which is configured to provide a release of the contained additives into a flow of lubricant over time or as a function of temperature in a site-specific manner to minimize wear or reduce oil oxidation due to harsh operating conditions. The structure defines a cage or capsule with screen or mesh sides (202) having multiple perforations or openings through which the flow of lubricant may circulate. Within the contained volume of the structure (200), additives are disposed in a gel matrix (10), and are release over time or as a function of temperature, through the perorations or openings, in close operative proximity to wear critical surfaces of the mechanical system such as a bearing assembly or gear arrangement.
摘要:
The invention relates to a roller bearing having an inner bearing ring having a raceway and an outer bearing ring having a raceway and a plurality of rolling elements disposed between the raceways that are lubricated by a lubricant. The invention is characterized in that the surface of the inner bearing ring and/or of the outer bearing ring facing the rolling elements and/or the surface of a cage holding the rolling elements have a surface structure.