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Support of a machine part which rotates on a bolt or the like

  • US 4,325,589 A
  • Filed: 06/12/1980
  • Issued: 04/20/1982
  • Est. Priority Date: 01/21/1977
  • Status: Expired due to Term
First Claim
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1. A multi-surface friction bearing construction for a machine part, for example a planet gear, which rotates on a stationary pin or the like, the rotating machine part having a loading direction which is stationary relative to the pin, wherein the improvement comprisesseveral bearing surfaces on the circumference of said stationary pin and formed by pitch circles each having a cylindrical surface, the rotating machine part having a circular cylindrical bore, the radius of each cylindrical surface differing from the radius of said cylindrical bore of said rotating part and forming points of intersection with the radii of the adjacent cylindrical surfaces, said stationary pin in addition having axially extending grooves arranged in the surface thereof, said rotating part at least in the carrying area of its circular cylindrical bore being of a material having good sliding characteristics and a higher heat-expansion coefficient than that of the other portions of the rotating part.

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