Vibration tamper
AssigneeBOMAG GmbH
InventorsArno Zurbes, Helmut Rotsch
Life of this patent
Estimating the term…
Abstract
A vibration tamper for packing soil has a guide handle elastically hinged on a tamper head of the tamper. The pivot point of the guide handle is located on the tamper head above an imaginary perpendicular extending from the grip area of the handle to the tamper longitudinal axis, and/or the handle has a special distribution of mass with regard to its pivot point.
Claims10
A tamper for soil packing, comprising a built-in drive (3) which executes nearly vertical vibrations, a guide handle (10) for holding the tamper by an operator, the guide handle (10) being elastically hinged on a tamper head (8) about a pivot point (11) and having a grip (10a) on one end and an extension (10b) on another end extending beyond the pivot point (11), the pivot point (11) being displaced from a longitudinal axis (A) in a direction toward the grip (10a), wherein at least one of the following relationships is satisfied:
- (a) the pivot point (11) is arranged on the tamper head (8) above an imaginary perpendicular (L) extending from the grip (10a) to the longitudinal axis (A) of the tamper, and
- (b) a distribution of mass of the guide handle (10), with the pivot point (11) as an imaginary dividing point, satisfies the following equation:
- ##EQU2## wherein m.sub.V =mass of the extension (10b) plus attached parts;
- m.sub.B =mass of the guide handle extending from the point (11) to the grip (10a) plus attached parts;
- l.sub.V =distance between a center of gravity of my and the pivot point (11);
- l.sub.B =distance between a center of gravity of m.sub.B and the pivot point (11);
- l.sub.VG =distance between the center of gravity of my and the grip (10a);
- l.sub.BG =Distance between the center of gravity of m.sub.B and the grip (10a).
A tamper for soil packing, comprising a built-in drive (3) which executes nearly vertical vibrations, a guide handle (10) for holding the tamper by an operator, the guide handle (10) being elastically hinged on a tamper head (8) about a pivot point (11) and having a grip (10a) on one end and an extension (10b) on another end extending beyond the pivot point (11), the extension (10b) carrying a counterweight (12), wherein at least one of the following relationships is satisfied:
- (a) the pivot point (11) is arranged on the tamper head (8) above an imaginary perpendicular (L) extending from the grip (10a) to a longitudinal axis (A) of the tamper, and
- (b) a distribution of mass of the guide handle (10), with the pivot point (11) as an imaginary dividing point, satisfies the following equation:
- ##EQU3## wherein m.sub.V =mass of the extension (10b) plus attached parts;
- m.sub.B =mass of the guide handle extending from the point (11) to the grip (10a) plus attached parts;
- l.sub.V =distance between a center of gravity of my and the pivot point (11);
- l.sub.B =distance between a center of gravity of m.sub.B and the pivot point (11);
- l.sub.VG =distance between the center of gravity of m.sub.V and the grip (10a);
- l.sub.BG =Distance between the center of gravity of m.sub.B and the grip (10a).
Dependencies are inferred from the claim text.