| 摘要 |
PCT No. PCT/FI87/00082 Sec. 371 Date Feb. 2, 1989 Sec. 102(e) Date Feb. 2, 1989 PCT Filed Jun. 17, 1987 PCT Pub. No. WO87/07932 PCT Pub. Date Dec. 30, 1987.A variable transmission automatically changing its transmission ratio in accordance with the resistance to propagation of the vehicle, in which the force-transmitting transmission link is a V-belt (1) or equivalent and in which at least the secondary pulley consists of cup disks (2,3) urged against each other and interconnected with a multiple-end screw (4,5) and a compression spring (7). As taught by the invention, the compression spring (7) is at the same time a torsion spring, and its initial position is settable at assembly or adjustable.
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