초록 ▼

A unitized seal assembly (10) for a rotary shaft (16) having a main section (20) rotatably supported in a housing (14) and a telescopic end (22) axially extendable relative to the main section (20). The seal assembly (10) comprises a generally rigid annular carrier body (28) supporting a flexible an

A unitized seal assembly (10) for a rotary shaft (16) having a main section (20) rotatably supported in a housing (14) and a telescopic end (22) axially extendable relative to the main section (20). The seal assembly (10) comprises a generally rigid annular carrier body (28) supporting a flexible annular sealing member (36) and a inner wear sleeve (44) in running engagement with the sealing member (36). The inner wear sleeve (44) includes an annular mounting skirt (54) which is attached to one end of a pleated elastomeric boot (58). The other end of the boot (58) is attached to the telescopic end (22) of the rotating shaft (16). The boot (58) accommodates extension and retraction of the telescopic end (22) of the shaft (16) as it reciprocates during rotation. Therefore, as the shaft (16) rotates during operation, the boot (58) together with the wear sleeve (44) rotate relative to the sealing member (36) and the outer carrier body (28). As the telescopic end (22) shifts axially due to loads imposed upon it during normal operation, the boot (58) expands and contracts, thereby protecting the spline connection (26). The boot (58) may be packed with grease or the like. The boot (58) also protects the sealing member (36) from rapid wear by isolating it from axial forces as the telescopic end (22) reciprocates.

대표청구항 ▼

[ What is claimed is:] [11.] A combination telescopic rotating shaft (16) and unitized seal assembly (10) therefor, said combination comprising: a housing (14); a shaft (16) having an axially fixed main section (20) rotatably supported in said housing (14) and a telescopic end (22) axially extendabl

[ What is claimed is:] [11.] A combination telescopic rotating shaft (16) and unitized seal assembly (10) therefor, said combination comprising: a housing (14); a shaft (16) having an axially fixed main section (20) rotatably supported in said housing (14) and a telescopic end (22) axially extendable relative to said main section (20) and said housing (14); a generally rigid annular carrier body (28) secured within said housing (14); a flexible annular sealing member (36) fixed on said carrier body (28) and presenting a radially inwardly facing primary annular sealing surface (38); a generally rigid annular inner wear sleeve (44) mounted on said axially fixed main section (20) of said shaft (16) for rotation therewith relative to said carrier body (28) and said housing (14) and having a running surface (50) engaging said primary sealing surface (38) of said sealing member (36); and characterized by an elastomeric boot (58) having longitudinally spaced ends (60, 62), one of said ends (60) being fixed to said wear sleeve (44) and the opposite end (62) being fixed to said telescopic end (22) for rotation with said shaft (16) and extension with said telescopic end (22).