公开(公告)号：US20220128093A1

公开(公告)日：2022-04-28

申请号：US17430559

申请日：2020-02-14

Applicant: NSK LTD.

Inventor： Tomoya ICHIKAWA

IPC: F16C33/78 ,  F16C19/06

Abstract: In an outer ring rotating rolling bearing (10), an inclined surface is formed on an outer peripheral surface of an inner ring (12) and decreasing in diameter toward an axially outer side, a seal member (20) includes an annular core metal (21) and an annular elastic member (22) fixed to the core metal (21), and an elastic member (22) includes a neck portion (28) extending from an inner peripheral edge portion (24a) of the core metal (21) toward a radially inner side and a seal lip (30) formed at a tip end portion of a neck portion (28) and brought into contact with the inclined surface (41) of the inner ring (12) with a tightening margin. Here, T2≥T1, where a width of the core metal (21) is T1 and a thickness of the neck portion (28) is T2. As a result, even in an environment where the outer ring is rotated at high speed and the seal member is subjected to external pressure (pressure fluctuation), the influence of centrifugal force generated on the seal lip can be suppressed, and the sealing performance of the seal member can be ensured.

公开(公告)号：US20160201788A1

公开(公告)日：2016-07-14

申请号：US14991990

申请日：2016-01-10

Applicant: NSK Ltd.

Inventor： Tomoya ICHIKAWA ,  Minoru TAHARA

IPC: F16H55/38 ,  F16C19/06

CPC classification number: F16H55/38 ,  F16C19/06 ,  F16C33/581 ,  F16C33/583 ,  F16C33/586 ,  F16C35/067 ,  F16C2240/42 ,  F16C2361/63 ,  F16H55/36 ,  F16H55/48 ,  F16H2200/0078

Abstract: Construction is achieved by which it is possible definitely prevent the occurrence of creep between a pulley 2b and an outer ring 7f. Trapezoidal shaped concave sections are formed such that the angle of intersection θ between the inside surfaces 23 on both sides of each concave section 17a of knurling 19a of the outer ring 7f is within the range 45°≦θ≦120°. Moreover, the depth h in the radial direction of the concave sections 17a and the diameter D of the circumscribed circle of the tip end surfaces 22 of the convex sections 18a are regulated so as to satisfy the relationship 0.004D≦h≦0.015D, and the length L in the circumferential direction of the bottom surface 21 of the concave sections 17a is regulated within the range 0.01D≦L≦0.03D.

Abstract translation: 通过该结构可以确实地防止滑轮2b和外圈7f之间的蠕变发生。 形成梯形凹部，使得交叉角度和角度; 在外环7f的滚花19a的各凹部17a的两侧的内侧面23之间的距离为45°＆lt; l1;＆ls;＆nl; 120°。 此外，凹部17a的径向的深度h和凸部18a的前端面22的外接圆的直径D被调节为满足关系0.004D＆nlE; h＆nlE; 0.015D，以及 凹部17a的底面21的圆周方向的长度L被调节在0.01D＆lt; NlE; L＆lt; ll; 0.03D的范围内。