초록 ▼

A trencher attachment for a hydraulic excavator of the truck mounted type enables the excavator to be effectively used in performing trenching functions relative to the construction and maintenance of various underground installations. The trencher attachment and a trencher carried thereby on the fr

A trencher attachment for a hydraulic excavator of the truck mounted type enables the excavator to be effectively used in performing trenching functions relative to the construction and maintenance of various underground installations. The trencher attachment and a trencher carried thereby on the free end of a telescopic boom of the excavator can be moved toward and away from the excavator, lifted and lowered, tilted and swung to any desired location where the trencher may be actuated by remote control from the excavator. The trencher attachment thereby enables a trenching operation to be performed in locations heretofore inaccessible to trenchers presently known in the art.

대표청구항 ▼

A trencher attachment for a power driven excavator of the truck mounted type having a power supply system, a telescopic boom extending therefrom and manueverable with respect thereto, said trencher attachment comprising an attachment frame including vertically positioned horizontally spaced body mem

A trencher attachment for a power driven excavator of the truck mounted type having a power supply system, a telescopic boom extending therefrom and manueverable with respect thereto, said trencher attachment comprising an attachment frame including vertically positioned horizontally spaced body members a rectangular top plate mounted on said body members, a transverse member mounted on said body members and a plurality of secondary frame members mounted on said transverse member, means on said top plate for connecting one end of said telescopic boom diagonally to said attachment frame rectangular top plate and rotating and tilting movement with respect to said telescoping boom, spaced drive and driven shafts journaled in said attachment frame body members and said attachment frame secondary members respectively, a drive chain connecting said drive and driven shafts, a trencher frame pivoted at one end to said driven shaft and an idler on the other end of said trencher frame, a drive sprocket on said driven, a a digging chain trained over said drive sprocket and said idler on said trencher frame, a motor on one of said vertically disposed body members of said attachment frame for moving said drive chain and means on said attachment frame for moving said trencher frame and digging chain in an arcuate path around said drive shaft in a vertical plane, said means comprising a pair of arms pivoted to and extending from said driven shaft, a lifting shaft on said arms engaging said trencher frame and a piston and cylinder assembly on said attachment frame connected to said pair of arms for moving said arms and said trencher frame in said arcuate path.