A multi-backhoe linkage mechanism, operable for rotating an output link around an output axis of rotation of an output joint at a base, includes a first closed kinematic chain, including the output link, a connecting link, and an input link. The output link is connected via the output joint to the base and via a connecting joint to the connecting link. The connecting link is connected via a bridging joint to the input link. The first closed kinematic chain additionally includes a base link connected to the base and to the input link. One or more additional closed kinematic chains are connected in a series after the first closed kinematic chain. Each additional closed kinematic chain is connected to the previous closed kinematic chain such that actuation of the additional closed kinematic chain amplifies the angle of rotation of the output link around the output axis of rotation.

A shovel includes a lower traveling body, an upper swiveling body mounted to the lower traveling body, attachments including a boom attached to the upper swiveling body, an arm attached to an end of the boom, and a bucket that is an end attachment attached to an end of the arm, and a control device configured to control swiveling of the upper swiveling body and movement of the attachments so that an end portion of the bucket moves along an extension of a slope toe, which is a target line.

A working device is provided wherein a tilt bucket 70 is pivotally joined, vertically swingably, to the tip of an arm 33 by a third pivot joint pin P3 and is vertically swung by a bucket cylinder 38 via first link members 81A, 81B and a second link member 82. The connection unit 100 to be connected to the first link members 81A, 81B is pivotally joined, vertically swingably, to the tip of the bucket cylinder 38. By switching the connection position of connection pins 131A, 131B of the connection unit 100 and the first link members 81A, 81B selectively between the position of a connection hole H1 and the position of a connection hole H2, the swing range and excavating force of the tilt bucket 70 are switched.

An excavator machine includes an undercarriage assembly including a drive assembly, and a carriage assembly rotatably coupled to the undercarriage assembly and including an operator cab positioned at a front of the carriage assembly. The excavator machine also includes a boom assembly. The boom assembly is coupled to the carriage assembly via two branches, and the branches are coupled to the carriage assembly on opposing sides of the operator cab.

A working device is provided wherein a tilt bucket 70 is pivotally joined, vertically swingably, to the tip of an arm 33 by a third pivot joint pin P3 and is vertically swung by a bucket cylinder 38 via first link members 81A, 81B and a second link member 82. The connection unit 100 to be connected to the first link members 81A, 81B is pivotally joined, vertically swingably, to the tip of the bucket cylinder 38. By switching the connection position of connection pins 131A, 131B of the connection unit 100 and the first link members 81A, 81B selectively between the position of a connection hole H1 and the position of a connection hole H2, the swing range and excavating force of the tilt bucket 70 are switched.

An excavator machine includes an undercarriage assembly including a drive assembly, and a carriage assembly rotatably coupled to the undercarriage assembly and including an operator cab positioned at a front of the carriage assembly. The excavator machine also includes a boom assembly. The boom assembly is coupled to the carriage assembly via two branches, and the branches are coupled to the carriage assembly on opposing sides of the operator cab.

An excavator machine includes an undercarriage assembly including a drive assembly, and a carriage assembly rotatably coupled to the undercarriage assembly and including an operator cab positioned at a front of the carriage assembly. The excavator machine also includes a boom assembly. The boom assembly is coupled to the carriage assembly via two branches, and the branches are coupled to the carriage assembly on opposing sides of the operator cab.

A position estimating system includes a first posture detector disposed in a linkage mechanism, and a controller that estimates information regarding the position of a bucket with respect to a work machine based on data regarding a shape of a first work implement, data regarding a shape of a second work implement, information regarding a posture of the first work implement, and a value detected by the first posture detector. The second work implement includes an extension part having a first end portion connectable to the bucket and a second end portion connectable to an arm. The linkage mechanism includes a first linkage part connected to the extension part through a first coupling portion, a second linkage part connected to the first linkage part through a second coupling portion, and a third linkage part disposed closer to the second end portion than the first linkage part.

A coupler assembly for detachably coupling an arm to a work tool. The coupler assembly comprises a first linkage having an idle link and a power link, a first pin provided on the arm, and a second pin provided on the power link. The first and second pins are receivable in openings on the work tool. The coupling assembly is characterized by a second linkage provided between the first and second pins comprising a first link and a second link joined at a shaft. The first link is fixed to the shaft to prevent rotation therebetween. A portion of the shaft comprises a gear. The second link comprises a body mounted on the shaft so as to be rotatable thereabout, the body comprising a chamber in which a piston is received, the piston including a geared section that is meshed with the gear.

A shovel includes a lower traveling body, an upper swiveling body mounted to the lower traveling body, attachments including a boom attached to the upper swiveling body, an arm attached to an end of the boom, and a bucket that is an end attachment attached to an end of the arm, and a control device configured to control swiveling of the upper swiveling body and movement of the attachments so that an end portion of the bucket moves along an extension of a slope toe, which is a target line.