초록 ▼

A header of an agricultural harvester or plant cutting machine is provided that includes a shaft sealing assembly for a center knife drive assembly having an output shaft, a cover, and a pressurized air source. The shaft sealing assembly is fastened to the cover, circumscribes the output shaft and c

A header of an agricultural harvester or plant cutting machine is provided that includes a shaft sealing assembly for a center knife drive assembly having an output shaft, a cover, and a pressurized air source. The shaft sealing assembly is fastened to the cover, circumscribes the output shaft and conveys pressurized air for cleaning.

대표청구항 ▼

1. A header of a harvester comprising: a frame for attaching to the harvester; anda center knife drive assembly attached to the frame, the center knife drive assembly including: a center knife drive having an output shaft,a cover covering the center knife drive and wherein the output shaft extends t

1. A header of a harvester comprising: a frame for attaching to the harvester; anda center knife drive assembly attached to the frame, the center knife drive assembly including: a center knife drive having an output shaft,a cover covering the center knife drive and wherein the output shaft extends through a through hole of the cover, the cover including a generally frustoconical portion defining a raised region for receiving the output shaft, the frustoconical portion having a sidewall and a top wall,a shaft sealing assembly attached to the cover, the shaft sealing assembly including: an annular cover circumscribing the output shaft, the annular cover having: a frustoconical inner portion,a middle portion, anda lower peripheral portion, wherein the lower peripheral portion directly attaches to the top wall of the frustoconical portion of the cover, anda ring for fixing the annular cover to the cover; anda pressurized air source delivering pressurized air to the center knife drive adjacent to the output shaft and below the shaft sealing assembly. 2. The header of claim 1, wherein the annular cover and ring are formed from a metal. 3. The header of claim 1, wherein the pressurized air source is directly connected to the sidewall of the frustoconical portion of the cover. 4. The header of claim 1, wherein the center knife drive further comprises a second output shaft and a second shaft sealing assembly, the pressurized air source further delivering pressurized air to the center knife drive adjacent to the second output shaft. 5. A harvester comprising: a header including: a center knife drive assembly having: a center knife drive having an output shaft,a cover covering the center knife drive and wherein the output shaft extends through a through hole of the cover, the cover having a generally frustoconical portion having an angled sidewall and a top wall, the frustoconical portion defining a raised region for receiving the output shaft,a shaft sealing assembly attached to the cover, the shaft sealing assembly having: an annular cover circumscribing the output shaft, the annular cover comprising: a frustoconical inner portion, a middle portion, and a lower peripheral portion, wherein the lower peripheral portion directly attaches to the top wall of the frustoconical portion of the cover, anda washer for fixing the annular cover to the cover; anda pressurized air system delivering pressurized air to the center knife drive adjacent to the output shaft and below the shaft sealing assembly, the pressurized air system having: a pressurized air source mounted to the harvester,a conductor connected to the pressurized air source, anda conductor fitting for attaching a branch of the conductor to the angled sidewall of the frustoconical portion of the cover.