A seal packing guard is provided in a roller assembly of a machine, such as a track carrier roller of a track-type undercarriage. The roller assembly includes a roller mounted on a shaft and having a seal retaining lubricant between the roller and the shaft. A collar and an inner surface of the roll
A seal packing guard is provided in a roller assembly of a machine, such as a track carrier roller of a track-type undercarriage. The roller assembly includes a roller mounted on a shaft and having a seal retaining lubricant between the roller and the shaft. A collar and an inner surface of the roller form a seal cavity placing the seal in fluid communication with an ambient atmosphere surrounding the roller. The seal packing guard is attached to an outward surface of the roller and extends over an opening into the seal cavity to reduce the amount of abrasive material entering the seal cavity and potentially compromising the integrity of the seal.
대표청구항▼
1. A seal packing guard for a roller assembly of a machine, wherein the roller assembly includes a roller shaft, a roller rotatably mounted on the roller shaft with a first end of the roller shaft extending beyond an outward surface of the roller, the roller and the roller shaft defining a lubricant
1. A seal packing guard for a roller assembly of a machine, wherein the roller assembly includes a roller shaft, a roller rotatably mounted on the roller shaft with a first end of the roller shaft extending beyond an outward surface of the roller, the roller and the roller shaft defining a lubricant reservoir there between, and with the outward surface of the roller defining an outward rim of the roller, the roller assembly further including an annular collar disposed on the first end of the roller shaft and received in the outward rim of the roller, and an annular seal disposed on the roller shaft proximate the first end of the roller shaft and between the roller and the roller shaft and forming a substantially water-tight seal of the lubricant reservoir, wherein the outward rim of the roller and an annular outer surface of the annular collar define a seal cavity placing the annular seal in fluid communication with an ambient atmosphere surrounding the roller, the seal packing guard comprising: a first annular guard portion having an inward surface secured to the outward surface of the roller so that the seal packing guard rotates with the roller, and wherein the first annular guard portion extends axially outwardly from the inward surface beyond the annular outer surface of the annular collar, the first annular guard portion having an annular inner surface with an inner diameter that is greater than an outer diameter of the annular outer surface of the annular collar; anda second annular guard portion connected to the first annular guard portion and having an inner surface with an inner diameter that is greater than an outer diameter of an outer surface of the roller shaft proximate the first end, and is less than the outer diameter of the annular outer surface of the annular collar, and the second annular guard portion having an inward surface defining, in cooperation with the annular outer surface of the annular collar, a seal cavity extension in fluid communication with the seal cavity. 2. The seal packing guard of claim 1, wherein the first annular guard portion comprises an annular outer surface having an outer diameter that is greater than an outer diameter of the outward rim the roller, wherein the second annular guard portion comprises an annular outer surface having an outer diameter that is approximately equal to the outer diameter of the outer surface of the first annular guard portion, and wherein the inner diameter of the inner surface of the first annular guard portion is greater than the inner diameter of the inner surface of the second annular guard portion. 3. The seal packing guard of claim 1, wherein the inward surface of the first annular guard portion is welded to the outward surface of the roller. 4. The seal packing guard of claim 1, wherein the first annular guard portion and the second annular guard portion are formed as a single unitary component. 5. The seal packing guard of claim 1, wherein the first annular guard portion comprises: a first annular plate comprising the inward surface, the outer surface and the inner surface of the first annular guard portion; andan intermediate transition portion extending outwardly from the first annular plate proximate the inner surface of the first annular plate and beyond the outer surface of the annular collar,wherein the second annular guard portion comprises a second annular plate comprising the inner surface and the inward surface of the first annular guard portion and an annular outer surface, and wherein the intermediate transition portion is connected to the second annular plate at the annular outer surface of the second annular plate. 6. The seal packing guard of claim 5, wherein the first annular plate, the second annular plate and the intermediate transition portion are formed as a single unitary component. 7. The seal packing guard of claim 1, wherein the inner diameter of the inner surface of the first annular guard portion is greater than an inner diameter of the outward rim of the roller. 8. The seal packing guard of claim 1, wherein the second annular guard portion comprises a plurality of fingers extending inwardly from the inner surface of the first annular guard portion and being circumferentially spaced about the roller shaft. 9. A roller assembly, comprising a roller shaft;a roller rotatably mounted on the roller shaft with a first end of the roller shaft extending beyond an outward surface of the roller, the roller and the roller shaft defining a lubricant reservoir there between, and with the outward surface of the roller defining an outward rim of the roller;an annular collar disposed on the first end of the roller shaft and received in the outward rim of the roller;an annular seal disposed proximate the first end of the roller shaft and between the roller and the roller shaft and forming a substantially water-tight seal of the lubricant reservoir, wherein the outward rim of the roller and an annular outer surface of the annular collar define a seal cavity placing the annular seal in fluid communication with an ambient atmosphere surrounding the roller; anda seal packing guard comprising: a first annular guard portion having an inward surface secured to the outward surface of the roller so that the seal packing guard rotates with the rollers, and wherein the first annular guard portion extends axially outwardly from the inward surface to an outward surface beyond the annular outer surface of the annular collar, the first annular guard portion having an annular inner surface with an inner diameter that is greater than an outer diameter of the annular outer surface of the annular collar, anda second annular guard portion connected to the first annular guard portion and having an inner surface with an inner diameter that is greater than an outer diameter of an outer surface of the roller shaft proximate the first end, and is less than the outer diameter of the annular outer surface of the annular collar, and the second annular guard portion having an inward surface defining, in cooperation with the annular outer surface of the annular collar, a seal cavity extension in fluid communication with the seal cavity. 10. The roller assembly of claim 9, wherein the first annular guard portion comprises an annular outer surface having an outer diameter that is greater than an outer diameter of the outward rim, wherein the second annular guard portion comprises an annular outer surface having an outer diameter that is approximately equal to the outer diameter of the outer surface of the first annular guard portion, and wherein the inner diameter of the inner surface of the first annular guard portion is greater than the inner diameter of the inner surface of the second annular guard portion. 11. The roller assembly of claim 9, wherein the inward surface of the first annular guard portion is welded to the outward surface of the roller. 12. The roller assembly of claim 9, wherein the first annular guard portion and the second annular guard portion are formed as a single unitary component. 13. The roller assembly of claim 9, wherein the first annular guard portion comprises: a first annular plate comprising the inward surface, the outer surface and the inner surface of the first annular guard portion; andan intermediate transition portion extending outwardly from the first annular plate proximate the inner surface of the first annular plate and beyond the outer surface of the annular collar,wherein the second annular guard portion comprises a second annular plate comprising the inner surface and the inward surface of the first annular guard portion and an annular outer surface, and wherein the intermediate transition portion is connected to the second annular plate at the annular outer surface of the second annular plate. 14. The roller assembly of claim 13, wherein the first annular plate, the second annular plate and the intermediate transition portion are formed as a single unitary component. 15. The seal packing guard of claim 9, wherein the inner diameter of the inner surface of the first annular guard portion is greater than an inner diameter of the outward rim of the roller. 16. The seal packing guard of claim 9, wherein the second annular guard portion comprises a plurality of fingers extending inwardly from the inner surface of the first annular guard portion and being circumferentially spaced about the roller shaft. 17. A seal packing guard for a roller assembly of a machine, wherein the roller assembly includes a roller shaft, a roller rotatably mounted on the roller shaft with a first end of the roller shaft extending beyond an outward surface of the roller, the roller and the roller shaft defining a lubricant reservoir there between, and with the outward surface of the roller defining an outward rim of the roller, the roller assembly further including an annular collar disposed on the first end of the roller shaft and received in the outward rim of the roller, and an annular seal disposed on the roller shaft proximate the first end of the roller shaft and between the roller and the roller shaft and forming a substantially water-tight seal of the lubricant reservoir, wherein the outward rim of the roller and an annular outer surface of the annular collar define a seal cavity placing the annular seal in fluid communication with an ambient atmosphere surrounding the roller, the seal packing guard comprising: an outer ring having an inward surface secured to the outward surface of the roller so that the seal packing guard rotates with the roller, and wherein the outer ring extends axially outwardly from the inward surface, the outer ring having an annular inner surface with an inner diameter; anda plurality of fingers circumferentially spaced about the outer ring and extending inwardly from the annular inner surface of the outer ring to overlay the seal cavity. 18. The roller assembly of claim 17, wherein the outer ring and the plurality of fingers are dimensioned so the plurality of fingers are disposed axially outwardly from the outward surface of the roller beyond the annular collar. 19. The roller assembly of claim 17, wherein each of the plurality of fingers has a triangular shape that tapers from a relatively wide base at the annular inner surface of the outer ring to a point at an inward end of the finger. 20. The roller assembly of claim 17, wherein each of the plurality of fingers has chamfered perimeter edges tapering inward from an inward side facing the annular collar to an outward side disposed opposite the inward side.
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이 특허에 인용된 특허 (9)
Burner,Bruce C.; Fox,Gerald P.; Allega,Michael D., Bearing assemblies with seals.
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