US 12,404,637 B2
Amplitude adjustment mechanism for a vibratory mechanism of a surface compaction machine
Fares Beainy, Mechanicsburg, PA (US); Maciej Karcz, Loslow (PL); and Lukasz Rembisz, Medlow (PL)
Assigned to Volvo Construction Equipment AB, Eskilstuna (SE)
Appl. No. 17/908,951
Filed by Volvo Construction Equipment AB, Eskilstuna (SE)
PCT Filed Mar. 4, 2020, PCT No. PCT/IB2020/051880
§ 371(c)(1), (2) Date Sep. 2, 2022,
PCT Pub. No. WO2021/176250, PCT Pub. Date Sep. 10, 2021.
Prior Publication US 2023/0086685 A1, Mar. 23, 2023
Int. Cl. E01C 19/28 (2006.01); B06B 1/16 (2006.01); E02D 3/074 (2006.01)
CPC E01C 19/286 (2013.01) [B06B 1/164 (2013.01); E02D 3/074 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An adjustment mechanism for a vibratory mechanism of a surface compaction machine, the adjustment mechanism comprising:
a screw coupled to a first eccentric shaft that is rotatable about an axis of rotation;
a nut coupled to a second eccentric shaft that is rotatable about the axis of rotation, wherein the screw is disposed within the nut;
a torque limiter coupled between the first eccentric shaft and the second eccentric shaft,
wherein the torque limiter prevents relative rotation between the first eccentric shaft and the second eccentric shaft and a phase adjustment between the first eccentric shaft and the second eccentric shaft when a net torque applied to the torque limiter is less than a locking torque threshold, and
wherein application of a net torque to the torque limiter that is greater than or equal to the locking torque threshold causes the first eccentric shaft to rotate with respect to the second eccentric shaft; and
an actuator subassembly coupled to the screw to selectively apply a first linear force to the screw in a linear direction parallel to the axis of rotation to cause the screw to apply a first torque to the first eccentric shaft,
wherein application of the first torque to the first eccentric shaft causes the first eccentric shaft to apply the first torque to the first eccentric shaft sufficient to apply a net torque to the torque limiter that is greater than or equal to the locking torque threshold to cause the first eccentric shaft to rotate with respect to the second eccentric shaft.