| 摘要 |
PCT No. PCT/EP96/03499 Sec. 371 Date Jun. 6, 1997 Sec. 102(e) Date Jun. 6, 1997 PCT Filed Aug. 7, 1996 PCT Pub. No. WO97/06308 PCT Pub. Date Feb. 20, 1997A vibration roller has at least one roll tire having a double shaft vibration generator arranged therein. The vibration generator has a first and a second driven unbalance shafts arranged in the roll tire. The roll tire has an inner support at which the first and second driven unbalance shafts are rotatably supported. The first and second driven unbalance shafts are coaxially arranged relative to one another on a common rotational axis such that the second driven unbalance shaft is rotatable about the first driven unbalance shaft. The common rotational axis of the first and second driven unbalance shafts coincide with the drive axis of the roll tire. For a first operational state of the vibration roller in which a directed vibration is generated, the first and second driven unbalance shaft are coupled such that the first and second driven unbalance shafts rotate in opposite directions to one another and a position angle between a maximum resulting centrifugal force (force vector) and a travel direction of the vibration roller is selectable as desired. For a second operational state of the vibration roller in which a circular vibration about the roll tire is generated, the first and second driven unbalance shafts are coupled such that the first and second driven unbalance shafts rotate in the same direction and a relative phase position for adjusting a value of the resulting centrifugal force is selectable as desired.
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