US 12,421,675 B2
Self-balancing uni-drum compactor
Lukasz Krzysztof Rembisz, Medlow (PL); Fares Beainy, Mechanicsville, PA (US); and Rafal Robert Cisowski, Jelcz-Laskowice (PL)
Assigned to Volvo Construction Equipment AB, Eskilstuna (SE)
Appl. No. 17/609,920
Filed by Volvo Construction Equipment AB, Eskilstuna (SE)
PCT Filed May 10, 2019, PCT No. PCT/IB2019/053896
§ 371(c)(1), (2) Date Nov. 9, 2021,
PCT Pub. No. WO2020/229873, PCT Pub. Date Nov. 19, 2020.
Prior Publication US 2022/0228328 A1, Jul. 21, 2022
Int. Cl. E01C 19/28 (2006.01); B06B 1/16 (2006.01)
CPC E01C 19/286 (2013.01) [B06B 1/16 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A surface compactor machine, comprising:
a cylindrical drum comprising a cylindrical drum shell and a cylindrical spool disposed within the cylindrical drum shell and supporting the cylindrical drum shell, the cylindrical drum shell and the cylindrical spool having an axis of rotation;
an eccentric assembly mechanically coupled to the cylindrical drum and arranged to impart vibration to the cylindrical drum when the eccentric assembly is rotated, wherein the cylindrical drum and the eccentric assembly form part of an unsprung mass having a combined first center of gravity;
a head plate affixed to the cylindrical spool through a shock isolator; and
a sprung mass rotationally coupled to the head plate along the axis of rotation, wherein the sprung mass comprises a plurality of components having a combined second center of gravity that is lower than the first center of gravity when the surface compactor machine is in a stationary position;
wherein the sprung mass comprises a traction system including a traction motor and a slewing gear coupled to the traction motor, wherein the traction system is configured to rotate the sprung mass relative to the unsprung mass about the axis of rotation.