VIBRATION SYSTEM FOR EARTH COMPACTING MACHINE AND EARTH COMPACTING MACHINE EQIPPED WITH SUCH A VIBRATION SYSTEM

摘要

A vibration system for an earth compacting machine with a vibration roller or for similar machines comprising a first and a second eccentric weights, a first and a second shafts (12,18), which are arranged in the roller axis, where the first eccentric weight (10) is connected via the first shaft (12) substantially directly to the drive (29), whilst the second eccentric weight (11) is connected via the second shaft (18) to the drive (29) indirectly by means of a spiral rod (17) provided with two contra-rotating spiral toothings (15, 16). The first spiral toothing (15) is arranged slidingly in the first sleeve (7) provided with the corresponding inner toothing, which toothing is meshing with the first spiral toothing (15) and the second spiral toothing (16) is arranged displaceably in the second sleeve (8). Provided also with the corresponding internal toothing, where this toothing is meshing with the second spiral toothing (16). One of the sleeves (7, 8) is arranged for its turning by the drive (29), whilst the second of the sleeves (8, 7) is arranged for driving of the second eccentric weight (11). The spiral rod (17) is connected via the bearing (6) to the linear drive (26) for shifting of the spiral rod (17) with regard to both sleeves (7, 8) for changing of positions of both eccentric weights (10,11), and thereby for changing of the vibration amplitude of the roller.