Patent ID: 7011488
Filing Date: 2006-03-14
Classification: B66C,E02F

Abstract:
1. A slide arm for a work implement, said slide arm comprising: a plurality of tubular structural bodies including an outer tubular structural body and an inner tubular structural body, each of which is formed by bending a one-piece plate into a shape having a substantially triangular cross-section and circular vertex portions, wherein the inner tubular structural body is telescoped within the outer tubular structural body; sliding members interposed between the outer tubular structural body and the inner tubular structural body at the vertex portions; and a sliding mechanism for sliding the tubular structural bodies, wherein a group of the sliding members are mounted to an inner surface of an open end of the outer tubular structural body at the vertex portions thereof, and a group of the sliding members are mounted to a rear end of the inner tubular structural body, wherein the outer tubular structural body supports the inner tubular structural body, wherein the sliding members comprise plain bearing units each having a circular arc surface for supporting and guiding curved surfaces of the circular vertex portions of the tubular structural bodies, and wherein each of the plain bearing units comprises a plurality of self-lubricating flat bearing pieces that are positioned such that a longitudinal direction of each said bearing piece extends along a longitudinal direction of the tubular structural bodies.