A sealed and lubricated rotatable track engaging element (130) includes a roller (32) and a roller shaft (38) extending through the roller (32) to support the roller (32) for rotation about a major axis (36). A first thrust surface (46) is fixed relative to the roller (32), and a second thrust surface (48) is fixed relative to the roller shaft (38). A seal cavity (44) extends between the roller (32) and the roller shaft (38) and is formed in part by each of the first thrust surface (46) and the second thrust surface (48), and a thrust washer stack (50) is within the seal cavity (44) and trapped between the first thrust surface (46) and the second thrust surface (48). The thrust washer stack (50) includes an inner thrust washer contacting the roller (32) to rotate at a first fractional speed of a speed of rotation of the roller (32), and an outer thrust washer contacting the inner thrust washer and the collar (68) to rotate at a second fractional speed that is less than the first fractional speed.
Rotatable element in machine track having thrust washer stack for stepping down relative speeds
2023-08-31
Patent
Electronic Resource
English
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