US 12,359,726 B2
Method of manufacturing hub seal
Yuichi Shuto, Fukushima (JP); Yuichi Tarukawa, Fukushima (JP); and Kazuki Hirota, Fukushima (JP)
Assigned to NOK CORPORATION, (JP)
Appl. No. 18/727,253
Filed by NOK CORPORATION, Tokyo (JP)
PCT Filed Dec. 28, 2022, PCT No. PCT/JP2022/048497
§ 371(c)(1), (2) Date Jul. 8, 2024,
PCT Pub. No. WO2023/136160, PCT Pub. Date Jul. 20, 2023.
Claims priority of application No. 2022-003360 (JP), filed on Jan. 12, 2022.
Prior Publication US 2025/0084923 A1, Mar. 13, 2025
Int. Cl. F16J 15/328 (2016.01); F16C 33/78 (2006.01); F16J 15/3232 (2016.01)
CPC F16J 15/3232 (2013.01) [F16C 33/7823 (2013.01); F16J 15/328 (2013.01); F16C 2326/02 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A method of manufacturing a hub seal, the hub seal including a side lip and being designed to seal a space between an outer ring and a hub of a hub bearing, the method comprising:
selecting, from within a designed region set in advance on a basis of a value (lip reaction force F/hub diameter D) given by dividing a reaction force F, which is a value of a reaction force of the side lip in an in-use state, by a hub diameter D, which is a value of a diameter of the hub, and a lip surface roughness R, which is a value of a surface roughness of a seal surface that is a surface of the side lip to be in contact with the hub, the lip reaction force F/hub diameter D and the lip surface roughness R, the designed region being a region of the lip reaction force F/hub diameter D and the lip surface roughness R;
designing the hub seal such that the lip reaction force F/hub diameter D and the lip surface roughness R become the selected lip reaction force F/hub diameter D and lip surface roughness R; and
manufacturing the hub seal such that the hub seal becomes the designed hub seal, wherein
the designed region is a region included in neither torque disturbance region nor a sealing performance decrease region, the torque disturbance region being a region of the lip reaction force F/hub diameter D and the lip surface roughness R and that is set in advance on the basis of the lip reaction force F/hub diameter D and the lip surface roughness R, the sealing performance decrease region being a region of the lip reaction force F/hub diameter D and the lip surface roughness R and that is set in advance on the basis of the lip reaction force F/hub diameter D and the lip surface roughness R,
the torque disturbance region is a region where torque disturbance is supposed to occur, and
the sealing performance decrease region is a region where a sealing performance is supposed to decrease.