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US 6,854,923 B2Granted
Working machine with reduced upper mass vibrations
AssigneeWacker Construction Equipment AG
InventorMartin Greppmair
Life of this patent
Estimating the term…
Abstract
A tamping machine for compacting soil has a crank mechanism for producing a directed vibration. The crank mechanism is coupled to a spring assembly. The parts of the crank mechanism which move back and forth linearly are made from a material with a density less than that of steel. This construction prevents vibrations which are unpleasant for the person operating the working machine from occurring.
Claims7
A tamping machine for soil compaction, comprising:
- a rotatable drive shaft connected to a motor;
- a working mass linearly reciprocatable in a tamping direction to tamp soil;
- and
- a crank mechanism and a spring assembly configured to translate rotational movement of the drive shaft into the linear movement of the working mass, the crank mechanism including:
- a crank disc operatively connected to the drive shaft for rotational movement therewith;
- a connecting rod fabricated from an elastic material having a density lower than the density of steel, the connecting rod having an upper end operatively connected to the crank disc and a lower end;
- a guide pin having an upper end pivotably connected to the second end of the connecting rod and a lower end;
- and
- a piston guide threaded onto the lower end of the guide pin.
6 more elements
Dependencies are inferred from the claim text.