US 12,085,128 B2
Axle bearing, grease composition and rolling ball bearing
Takayuki Kawamura, Mie (JP); Ryouta Kondou, Mie (JP); Makoto Seki, Shizuoka (JP); and Susumu Yamaji, Shizuoka (JP)
Assigned to NTN CORPORATION, Osaka (JP)
Appl. No. 17/767,891
Filed by NTN CORPORATION, Osaka (JP)
PCT Filed Oct. 8, 2020, PCT No. PCT/JP2020/038085
§ 371(c)(1), (2) Date Apr. 9, 2022,
PCT Pub. No. WO2021/070888, PCT Pub. Date Apr. 15, 2021.
Claims priority of application No. 2019-187011 (JP), filed on Oct. 10, 2019; and application No. 2019-187033 (JP), filed on Oct. 10, 2019.
Prior Publication US 2024/0084853 A1, Mar. 14, 2024
Int. Cl. F16C 19/18 (2006.01); C10M 107/02 (2006.01); C10M 115/08 (2006.01); C10M 169/00 (2006.01); C10M 169/02 (2006.01); C10M 169/04 (2006.01); F16C 33/66 (2006.01); C10N 20/02 (2006.01)
CPC F16C 33/6633 (2013.01) [C10M 107/02 (2013.01); C10M 115/08 (2013.01); C10M 169/02 (2013.01); C10M 169/04 (2013.01); F16C 19/183 (2013.01); F16C 33/6603 (2013.01); C10N 2020/02 (2013.01); F16C 2326/02 (2013.01)] 12 Claims
OG exemplary drawing
 
1. An axle bearing that is configured to rotatably support a wheel of a vehicle or an axle connected to the wheel, the axle bearing comprising a grease composition sealed in an inner space of the axle bearing,
wherein:
the grease composition contains a base oil and a thickener,
the shear stress of the grease composition at the shear rate of 1,000-10,000 s−1 at 25° C. is 3,000 Pa or less, the viscosity of the grease composition is 1 Pas or less, and
the yield stress of the grease composition at 25° C. measured by a dynamic viscoelasticity analysis method using a rheometer is 1,300-3,000 Pa.