Seal ring, cross shaft coupling, intermediate shaft assembly, steering device
AssigneeNsk Ltd.
InventorsSeiichi Moriyama, Masaki Takahashi
Life of this patent
Estimating the term…
Abstract
A seal ring (26) configured to be employed with a cross shaft (16) including a center section (17) and four shaft sections (18a, 18b, 18c, 18d) extending in four directions from the center section and formed with step faces (17a) where the center section widens out from base ends of the shaft sections outward in radial directions of the shaft sections, and with bearings (21) for mounting to leading end portions of the shaft sections. The seal ring is fitted over the shaft section and interposed between the bearing and the step face. The seal ring includes a seal lip (34) configured to contact the step face around the entire circumference, and an indentation (36) the seal lip enters by deforming when mounted to the cross shaft.
Claims20
A seal ring configured to be employed
- with a cross shaft including a center section and four shaft sections extending in four directions from the center section and formed with step faces where the center section widens out from base ends of the shaft sections outward in radial directions of the shaft sections, and
- with bearings for mounting to the shaft sections,
- by the seal ring fitting over the shaft section and being interposed between the bearing and the step face;
- the seal comprising
- a seal lip configured to contact the step face;
- and
- an indentation the seal lip enters when the seal lip is deformed by the contact;
- a circular ring shape core member having a higher rigidity than that of other portions;
- the core member including a flange portion widening out in a radial direction around an entire circumference of the core member;
- and
- an outer peripheral portion of the flange portion including radial direction indentations and projections.
A seal ring configured to be employed
- with a cross shaft including a center section and four shaft sections extending in four directions from the center section and formed with step faces where the center section widens out from base ends of the shaft sections outward in radial directions of the shaft sections, and
- with bearings for mounting to the shaft sections,
- by the seal ring fitting over the shaft section and being interposed between the bearing and the step face;
- the seal comprising
- a seal lip configured to contact the step face;
- and
- an indentation the seal lip enters when the seal lip is deformed by the contact;
- a seat configured to contact the step face;
- a circular ring shape core member having a higher rigidity than that of other portions;
- a portion of the core member configuring the seat;
- the core member including a flange portion widening out in a radial direction around an entire circumference of the core member;
- an outer peripheral portion of the flange portion including radial direction indentations and projections.
A seal ring configured to be employed
- with a cross shaft including a center section and four shaft sections extending in four directions from the center section and formed with step faces where the center section widens out from base ends of the shaft sections outward in radial directions of the shaft sections, and
- with bearings for mounting to the shaft sections,
- by the seal ring fitting over the shaft section and being interposed between the bearing and the step face;
- the seal comprising
- a seal lip configured to contact the step face;
- and
- an indentation the seal lip enters when the seal lip is deformed by the contact;
- a seat configured to contact the step face;
- a circular ring shape core member having a higher rigidity than that of other portions;
- a portion of the core member configuring the seat;
- the core member including a positioning portion exposed toward the shaft section radial direction outside or inside;
- the core member including a flange portion widening out in a radial direction around an entire circumference of the core member;
- and
- an outer peripheral portion of the flange portion including radial direction indentations and projections.
Dependencies are inferred from the claim text.