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US 2004/0165953 A1Published application
Working machine with reduced upper mass vibrations
AssigneeWacker Construction Equipment AG
InventorMartin Greppmair
Life of this patent
Estimating the term…
Abstract
A hammer or a ramming 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.
Claims20
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
A tamping machine for soil compaction, comprising:
- an upper mass including a motor, a working mass that is driven in a tamping manner and that can be driven linearly back-and-forth, via a crank mechanism and a spring assembly, by the motor belonging to an upper mass, wherein the crank mechanism has at least one structural element that is movable linearly back and forth and that is produced from a material, the density of which is lower than that of steel, and wherein said crank mechanism comprises a connecting rod produced from said material.
A tamping machine for soil compaction, comprising:
- an upper mass including a motor, a working mass that is driven in a tamping manner and that can be driven linearly back-and-forth, via a spring assembly and a crank mechanism comprising a connecting rod, by the motor, wherein the crank mechanism has at least one structural element that is movable linearly back and forth and that is produced from a material, the density of which is lower than that of steel, and wherein said at least one structural element comprises a substantially cylindrical guide piston that is nonelastically connected to said connecting rod.
Dependencies are inferred from the claim text.