摘要:
A roller bearing assembly is provided which is adapted to enhance lubrication performance for preventing seizure and for reducing frictional torque during rotation. The roller bearing assembly includes an inner ring (1), an outer ring (2) and a roller (3) rollably interposed between these inner and outer rings. The inner ring (1) is formed with a rib (4) making contact with a greater end face (7) of the roller (3) for guiding the rolling motion of the roller (3). A recess (5) is formed centrally of the greater end face (7) of the roller (3). A stopper member (6) for preventing oil invasion is fitted in the recess (5) of the roller (3).
摘要:
A shielding plate for controlling the entry of oil between an inner ring and an outer ring is provided in the vicinity of an opening between the inner ring and the outer ring which lies a side where oil enters. In addition, a fluid accommodating plate for accommodating therein oil is provided in the vicinity of an opening between the outer ring and the inner ring which lies on a side where oil exits.
摘要:
A tapered roller bearing includes an outer ring, an inner ring including a large rib surface formed into a concavely curved surfaced recessed in an axial direction, and a plurality of tapered rollers. R1/R2 is in the range of 0.07 to 0.8 where R1 represents radius of curvature of a large end face of the tapered roller and R2 represents a radius of curvature of the concavely curved surface. An arithmetical mean roughness the large end face is in the range of 0.01 to 0.03 μm. A total crowning amount is 50 μm or larger, an outer ring crowning rate, which is a rate of the outer ring crowning amount on the total crowning amount, is 40% or larger, and a roller crowning rate, which is a rate of two times of the roller crowning amount on the total crowning amount is 20% or smaller.
摘要翻译:圆锥滚子轴承包括外圈,内圈,其包括形成为沿轴向凹陷的凹曲面的大肋面,以及多个圆锥滚子。 R 1 / R 2在0.07〜0.8的范围内,其中R 1表示圆锥滚子的大端面的曲率半径,R 2表示凹曲面的曲率半径。 大端面的算术平均粗糙度在0.01〜0.03μm的范围内。 总冠量为50um以上,作为外冠加冠量的总加冠量的外圈加冠率为40%以上,辊加冠率为2倍 总冠量的滚珠加工量的次数为20%以下。
摘要:
A tapered roller bearing is designed to have a roller loading ratio in the range of 0.7 to 0.92 and a ratio of roller length to roller diameter in the range of 1.1 to 1.7 whereby oil agitation loss and rolling viscous resistance are reduced for achieving the reduction of running torque. Crownings are provided which are designed to have an outer-ring crowning parameter (=RCO/LRO) in the range of 30 to 150 and an inner-ring crowning parameter (=RCI/LRI) in the range of 50 to 260, provided that RCO denotes the radius of an outer ring crowning, LRO denotes the raceway length of an outer ring, RCI denotes the radius of an inner ring crowning and LRI denotes the raceway length of an inner ring. Thus, the rolling viscous resistance is reduced for achieving the reduction of running torque.
摘要:
A tapered roller bearing device has an inner ring 1, an outer ring 2, tapered rollers 3, a retainer 5 and a shield plate 6. The inner ring 1 has a flange portion 1a brought in contact with minor diameter end surfaces of the tapered rollers 3. The shield plate 6 is placed brought in contact with an end surface of the flange portion 1a of the inner ring 1. The shield plate 6 has a protrusion 9 that protrudes radially outwardly of the flange portion 1a. The protrusion 9 is placed in a place having an interval from the retainer 5 in an axial direction of the inner ring 1.
摘要:
A tapered roller bearing according to the invention is such that when an arithmetical mean roughness as a surface roughness of a large end face of a tapered roller is σ1 and an arithmetical mean roughness as a surface roughness of a large rib surface of an inner ring is σ2, σ1 is 0.04 μm or larger, and a composite roughness that is expressed by a square root of a sum of a squared value of σ1 and a squared value of σ2 is 0.17 μm or smaller. Raceway surfaces of an outer ring and the inner ring and a rolling contact surface of the tapered roller are crowned, and a total crowning amount is set to 50 μm or larger, an outer ring crowning rate is set to 40% or larger, and a roller crowning rate is set to 20% or smaller.
摘要:
A shielding plate for controlling the entry of oil between an inner ring and an outer ring is provided in the vicinity of an opening between the inner ring and the outer ring which lies a side where oil enters. In addition, a fluid accommodating plate for accommodating therein oil is provided in the vicinity of an opening between the outer ring and the inner ring which lies on a side where oil exits.
摘要:
A tapered roller bearing according to the invention is such that when an arithmetical mean roughness as a surface roughness of a large end face of a tapered roller is σ1 and an arithmetical mean roughness as a surface roughness of a large rib surface of an inner ring is σ2, σ1 is 0.04 μm or larger, and a composite roughness that is expressed by a square root of a sum of a squared value of σ1 and a squared value of σ2 is 0.17 μm or smaller. Raceway surfaces of an outer ring and the inner ring and a rolling contact surface of the tapered roller are crowned, and a total crowning amount is set to 50 μm or larger, an outer ring crowning rate is set to 40% or larger, and a roller crowning rate is set to 20% or smaller.
摘要:
An end faced on an outer side in a radial direction of a small diameter annular portion of a retainer is disposed on an inner side in a radial direction of a pitch conical face of a taper roller and an end face on an inner side in a radial direction of a large diameter annular portion is disposed on an outer side in the radial direction of the pitch conical face. Further, a portion of the small diameter annular portion opposed to a small diameter end face of the taper roller is disposed on the inner side in the radial direction of the pitch conical face and a portion of the large diameter annular portion opposed to a large diameter end face of the taper roller is disposed on the outer side in the radial direction of the pitch conical face.
摘要:
A tapered roller bearing is designed to have a roller loading ratio in the range of 0.7 to 0.92 and a ratio of roller length to roller diameter in the range of 1.1 to 1.7 whereby oil agitation loss and rolling viscous resistance are reduced for achieving the reduction of running torque. Crownings are provided which are designed to have an outer-ring crowning parameter (=RCO/LRO) in the range of 30 to 150 and an inner-ring crowning parameter (=RCI/LRI) in the range of 50 to 260, provided that RCO denotes the radius of an outer ring crowning, LRO denotes the raceway length of an outer ring, RCI denotes the radius of an inner ring crowning and LRI denotes the raceway length of an inner ring. Thus, the rolling viscous resistance is reduced for achieving the reduction of running torque.