公开(公告)号：US20130182986A1

公开(公告)日：2013-07-18

申请号：US13777380

申请日：2013-02-26

Applicant: NSK Ltd.

Inventor： Takanori TANAKA ,  Tomoharu SAITO ,  Yasushi TANOUE

IPC: F16C19/14

CPC classification number: F16C19/14 ,  F16C19/163 ,  F16C19/182 ,  F16C19/505 ,  F16C19/548 ,  F16C33/585 ,  F16C2240/34 ,  F16C2240/46 ,  F16C2240/76 ,  F16C2361/61 ,  F16H48/42 ,  F16H2048/423

Abstract: A rotation support device for a pinion shaft is configured such that, together with being able to sufficiently maintain axial rigidity of a rolling bearing on the side opposite from the pinion gear side, it is able to sufficiently reduce the dynamic torque during operation and the starting torque at the start of operation. Together with using a single-row angular contact ball bearing as the rolling bearing on the side opposite from the pinion gear side, the ratio of the radius of curvature Ro of the outer raceway and the diameter Bd of the balls (Ro/Bd) is regulated within the range 0.52

Abstract translation: 用于小齿轮轴的旋转支撑装置被构造成使得能够充分地保持滚动轴承在与小齿轮侧相反的一侧的轴向刚性的同时，能够充分地降低运转和启动时的动态转矩 开始运行时的扭矩。 与在小齿轮侧相反的一侧使用单列角接触球轴承作为滚动轴承，外滚道的曲率半径Ro与滚珠的直径Bd（Ro / Bd）之比为 在0.52

公开(公告)号：US20130170780A1

公开(公告)日：2013-07-04

申请号：US13777455

申请日：2013-02-26

Applicant: NSK, Ltd.

Inventor： Tomoharu SAITO ,  Masato KOBAYASHI ,  Yasushi TANOUE ,  Takuya IWAO ,  Shinji FUJITA

IPC: F16C33/60 ,  B23P15/00

CPC classification number: F16C33/60 ,  B23P15/003 ,  B24C1/10 ,  F16C19/364 ,  F16C33/366 ,  F16C33/585 ,  F16C33/6651 ,  F16C2223/08 ,  F16C2240/44 ,  F16C2240/54 ,  F16C2361/61 ,  Y10T29/49707

Abstract: Spherical particles having diameters of 100 μm or less are projected on a surface of a tapered roller so as to form recesses and protrusions, and abrasive particles are then projected thereon so as to remove the protrusions. The abrasive particles result from adhering 5 mass % diamond grains with an average diameter of 10 μm on surfaces of 1 mm-diameter rubber particles. As a result, multiple recesses having circular openings of 50 μm or less are formed on the surface of the tapered roller at intervals of 200 μm or less. These recesses become moderate oil pools, heightening the oil film formation capability of the roller surface, and thus torque of the tapered roller bearing may be decreased.

Abstract translation: 将直径为100μm以下的球状颗粒投影在圆锥滚子的表面上，形成凹部和凸部，然后将研磨粒子突出，从而除去突起。 研磨颗粒的结果是在1mm直径的橡胶颗粒的表面上粘附平均粒径为10微米的5质量％的金刚石颗粒。 结果，在圆锥滚子的表面上以200μm或更小的间隔形成具有50um或更小的圆形开口的多个凹部。 这些凹部变成适度的油池，提高辊面的油膜形成能力，因此可以减小圆锥滚子轴承的扭矩。