US 12,486,622 B2
Hand-held tamping machine for compacting track ballast
Florian Muehlbacher, Waging (DE)
Assigned to ROBEL Bahnbaumaschinen GmbH, Freilassing (DE)
Filed by ROBEL Bahnbaumaschinen GmbH, Freilassing (DE)
Filed on May 25, 2022, as Appl. No. 17/824,251.
Claims priority of application No. 10 2021 205 469.2 (DE), filed on May 28, 2021.
Prior Publication US 2022/0380986 A1, Dec. 1, 2022
Int. Cl. E01B 27/14 (2006.01)
CPC E01B 27/14 (2013.01) 17 Claims
OG exemplary drawing
 
1. A hand-held tamping machine for compacting track ballast below a track sleeper, the tamping machine comprising:
a tamping pick for penetrating the track ballast;
a vibration generator for vibration excitation of said tamping pick, said vibration generator being configured such that forces generated for said vibration excitation of said tamping pick act perpendicular to a shaft axis;
a motor connected with said vibration generator via a drive shaft, said drive shaft having said shaft axis;
a handle assembly with at least one handle for steering the hand-held tamping machine during operation;
said at least one handle being arranged, along said shaft axis of said drive shaft, above at least one of:
a machine center of gravity of the hand-held tamping machine by at least 30% of an overall height of the hand-held tamping machine; or
a motor center of gravity of said motor by at least 15% of the overall height of the hand-held tamping machine.