| 摘要 |
<p>An endless metal belt comprises a pair of layered ring structures(31) each formed by superposing a plurality of thin metal rings (R1, R2, ... and Rn) in layers so as to be slidable relative to each other, and a plurality of metal blocks (32) arranged along the length of the pair of layered ring structures (31) and supported on the pair of layered ring structures (31) so as to be slidable relative to the pair of layered ring structures (31). The inner circumferences of the thin metal rings (R2, R3, ... Rn) excluding the innermost thin metal ring (R1) are provided with oil retaining grooves (34), and the inner circumference in sliding contact with saddle surfaces (324) of the metal blocks (32) of the innermost thin metal ring (R1) is a flat, smooth surface (35) not provided with any oil retaining grooves and having a small surface roughness. The circumferences of adjacent thin metal rings in sliding contact with each other are lubricated by a lubricating oil retained in the oil retaining grooves (34) with resultant reduction of friction. Since the inner circumference of the innermost thin metal ring (R1), which is in sliding contact with the saddle surfaces (324), is flat and smooth with a small surface roughness, the friction of the inner circumference is reduced. Thus, the ring assembly forming the endless metal belt has an increased durability in its entirety. <IMAGE></p> |
