| 摘要 |
An endless transmission belt of the invention includes a plurality of sets of link plates and a plurality of pin pairs, each pair of pins linking one end of one set of link plates to an adjacent end of another set of link plates. A plurality of blocks are mounted on the link plates and extend around the circumference of the belt. Each of the blocks has a pin engagement groove defined by a circumferential contact surface for engaging a pin in the running direction of the belt, an opening and a pair of side walls each extending from the circumferential contact surface to the opening. One of side walls provides a radial contact surface for a pin. Each of the pins has a transverse cross-section defined in part by (1) a rocking surface for contact with its paired pin, (2) a first curved surface for radial contact with a sidewall of the pin engagement groove and (3) a second curved surface for contacting the circumferential surface of a block and the link plates. The dimensions of the radial contact surface of the pin engagement groove and the dimensions of the surfaces of each pin are selected to minimize, where the belt passes over a pulley, the difference between (1) DELTA r which is the total of the displacement of the points of contact between paired pins as a result of the pins of a pair rolling with respect to each other, the displacement of the pins per se and the relative displacement between the pairs of pins and the blocks due to their rotation relative to one another and (2) DELTA ri which is the ideal DELTA r, from the viewpoint of variation in belt speed, vibration and noise.
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