Vibration tamper
AssigneeBOMAG GmbH
InventorArno Zurbes
Life of this patent
Estimating the term…
Abstract
A vibration tamper for soil compacting has a guide handle proceeding from the tamper head, which is pivoted elastically on the tamper. At the same time, the handle has a special mass distribution with regard to its pivot point.
Claims9
A tamper for soil compacting, comprising a built-in drive (3) which executes approximately vertical vibrations of a tamper foot (2), a guide handle (6) for operatingly holding the tamper, said guide handle (6) having a bracket means (7) attached thereto and being rigidly mounted on a tamper axis (A) of said tamper and elastically pivoted about an axis perpendicular to said tamper axis (A) on at least one pivot point (8) and having a grip end (9), wherein a mass distribution of the guide handle brings about a reduction of vibrations at the grip end, the mass distribution and a geometry of the guide handle satisfy the following equation:
- ##EQU3## wherein:
- m.sub.S =mass of the guide handle (6);
- .THETA..sub.S =inertial moment of the guide handle (6) around an axis through a center of gravity (10) of the guide handle (6), which extends parallel to an axis leading through the pivot point (8);
- l.sub.H =distance perpendicular to the tamper axis (A) between the axis leading through the pivot point (8) and the center of gravity (10);
- l.sub.HG =distance perpendicular to the tamper axis (A) between the grip end (9) and the center of gravity (10);
- and
- l.sub.v =distance parallel to the tamper axis (A) between the axis leading through the pivot point (8) and the center of gravity (10).
A tamper for soil compacting, comprising a built-in drive (3) which executes approximately vertical vibrations of a tamper foot (2), a rigid guide handle (6) having a bracket means (7) attached thereto and being mounted on a tamper axis (A) of said tamper and being elastically pivoted about an axis perpendicular to said tamper axis (A) on at least one pivot point (8) and having a grip end (9), wherein a mass distribution of the guide handle yields a reduction of vibrations at the grip end, when the mass distribution and a geometry of the guide handle satisfy the following equation:
- wherein:
- X=a unitless number within a range between 0.8 and 1.3;
- m.sub.S =mass of the guide handle (6);
- .THETA..sub.S =inertial moment of the guide handle (6) around a center of gravity (10) of the guide handle (6), a first axis extending through the center of gravity and being parallel to the guide handle (6), a second axis extending through the center of gravity, being perpendicular to the first axis and being parallel to the tamper axis (A);
- l.sub.H =distance perpendicular to tamper axis (A) between a center of the pivot point (8) and the center of gravity (10);
- l.sub.HG =distance perpendicular to the tamper axis (A) between the grip end (9) and the center of gravity (10);
- and
- l.sub.v =distance parallel to the tamper axis (A) between a center of the guide handle (6) and the center of gravity (10).
Dependencies are inferred from the claim text.