Patent ID: 7946662
Filing Date: 2011-05-24
Classification: B62D

Abstract:
1. A crawler belt assembly comprising: a track shoe; a pair of track shoe connecting links, each of the track shoe connecting links having a pair of end portions, a pair of shaft holes, a single shaft hole of the shaft holes being formed at a respective end portion of the track shoe connecting link and the shaft holes opening in a same direction, a plurality of insertion holes that are formed between the shaft holes and opens in a direction perpendicular to center axes of the shaft holes, the track shoe connecting link being fixed to the track shoe by bolts inserted through the insertion holes and nuts screwed to the bolts, a plurality of window holes each located at a position corresponding to one of the insertion holes, wherein the shaft holes have different diameters, the area of the window hole adjacent to the shaft hole of a larger diameter is greater than that of the other window hole adjacent to the shaft hole of a smaller diameter such that the track shoe connecting link has decreasing rigidity from the shaft hole of the smaller diameter toward the shaft hole of the larger diameter to control stress, the track shoe connecting links of the track shoe connecting link pair are parallel to each other; a support shaft fixed to the shaft holes of the smaller diameter in the track shoe connecting links of the connecting link pair; and a sleeve supported to the shaft holes of the larger diameter of the track shoe connecting links of the connecting link pair, the sleeve being externally fitted to the support shaft of an adjacent connecting link pair so as to be rotatable.