Guide rail for crawler track

  • US 9,776,676 B2
  • Filed: 11/11/2014
  • Issued: 10/03/2017
  • Est. Priority Date: 11/12/2013
  • Status: Active Grant
First Claim
Patent Images

1. A crawler mechanism comprising:

  • a frame including a first end, a second end, a first side extending between the first end and the second end and proximate a support surface, and a second side;

    a track including a plurality of shoes coupled together and supported for movement relative to the frame along a direction of travel, each shoe including a first end, a second end, and an intermediate portion positioned between the first end and the second end, the intermediate portion having a shoe hardness;

    a sprocket rotatably coupled to the first end of the frame, the sprocket driving the plurality of shoes to move along the second side of the frame;

    a guide rail coupled to the second side of the frame and including a base having an outer surface and a coating bonded to the outer surface, the outer surface of the base having a base hardness, the coating contacting the intermediate portion of the shoes as the shoes move along the second side of the frame, the coating having a coating hardness less than the shoe hardness; and

    a roller supported by the frame for rotation about an axis transverse to the direction of travel of the plurality of shoes, the roller positioned adjacent the first side of the frame and exerting a compressive force on the intermediate portion of each shoe, wherein the compressive force work hardens the shoe during a work-hardening period,wherein the shoe hardness of the intermediate portion is initially less than the base hardness, wherein after the work-hardening period the shoe hardness of the intermediate portion is equal to or greater than the base hardness.

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