The coupler is mounted on the end of the boom of a boom-tractor, and provides secure locking-in of a bucket. The coupler having been set to its latched-open condition, the tractor is driven to the bucket so that the bottom-lug of the bucket enters the coupler, whereupon the bucket is picked up and is automatically securely locked into coupler, without and manipulation of the coupler being required of the tractor-driver other than manipulation of the boom. For setting the bucket down on the ground, after use, the driver manually pulls out a slider of the coupler. That action sets the coupler into its slider-held condition, whereby when the tractor is driven away from the bucket, the coupler is automatically left set in the said latched-open condition.

The present invention is related to a coupler for detachably coupling to a work tool is provided. The coupler includes a frame with a first aperture formed therein. The first aperture extends along a first axis inclined with respect to a transverse axis of the frame. The coupler further includes a first locking member provided within the first aperture. The coupler also includes an actuator configured to move the first locking member between an unlocked position in which first locking member is disengaged from the work tool, and a locked position in which the first locking member is engaged with the work tool.

There is provided an excavation assembly for use in an excavator, wherein the excavation assembly is removably coupled to an arm at a pair of spaced shaft-receiving portions defined therein, wherein the excavation assembly performs an excavation operation into a ground or a rock, wherein the excavation assembly comprises: a body removably coupled at one end thereof to the pair of spaced shaft-receiving portions; a driving mechanism configured to generate at least one of a linear driving force, a rotational driving force, and a striking force; an excavation tool coupled to the driving mechanism and configured to be driven by at least one of the linear driving force, the rotational driving force, and the striking force transmitted from the driving mechanism, thereby to perform the excavating operation, wherein a direction of the excavation operation by the excavation tool varies depending on coupling positions between the pair of spaced shaft-receiving portions and the body.

A tool coupler assembly may include a power linkage assembly, and the power linkage assembly may include a first power link. The first power link may include a first end configured for pivotal connection to a tool, and a second, opposite end configured for pivotal connection to one end of a tool control actuator. The tool control actuator may be connected at an opposite end to a first end of a tool support member of a machine, wherein operation of the tool control actuator pivots the tool about a tool pivot axis coaxial with a tool engagement interface at a second end of the tool support member. A power linkage actuator may be pivotally connected at a first end for coaxial rotation with the tool engagement interface at the second end of the tool support member, and at a second end for coaxial rotation with the first end of the first power link.

A shovel includes a lower traveling body, an upper turning body turnably mounted on the lower traveling body, a link unit attached to the upper turning body, and a processing circuitry configured to align an end of the link unit with an end attachment to be attached.

An integrally cast hinge assembly for a bucket, including a first and second hinge plates, a first torque tube portion extending from the first hinge plate, a second torque tube portion extending from the second hinge plate, a third torque tube portion extending between the first hinge plate and the second hinge plate, and a support plate extending along a bottom portion of the hinge assembly. The first torque portion is weldlessly connected to the first hinge plate, the second torque tube portion is weldlessly connected to the second hinge plate, the third torque tube portion is weldlessly connected to both the first hinge plate and the second hinge plate, and the support plate is weldlessly connected to the first hinge plate, the second hinge plate, the first torque tube portion, the second torque tube portion, and the third torque tube portion.

A quick-change system for changing attachments on a construction machine includes a quick changer mounted to rotate in a drive housing of a rotary device and rotatable relative to drive housing by a rotary drive, and a rotary joint arranged in the drive housing with a stator and a rotor rotatable within stator to supply a working fluid to the quick changer. In order to permit simple and stable fastening of the rotary joint, the stator of the rotary joint arranged within a through-opening of the drive housing is radially supported against the drive housing above an upper end surface and beneath the upper end surface of a drive wheel of the rotary drive arranged in the drive housing.

An integrally cast hinge assembly for a bucket, including a first hinge plate, a second hinge plate spaced apart from the first hinge plate, and a torque tube portion extending between the first hinge plate and the second hinge plate, wherein the first hinge plate is weldlessly connected to the torque tube portion and the second hinge plate is weldlessly connected to the torque tube portion.

Some embodiments of the invention provide a lift arm including an attachment assembly and an electrical supply line having a first end and a second end. The first end is fixed in relation to the lift arm and the second end has a connector coupled to a mounting plate. The lift arm includes a first bracket affixed to the lift arm and a second bracket affixed to the attachment assembly. The mounting plate is moveable between and removably securable to the first bracket and the second bracket.

A work machine includes a frame, a traction system supporting the frame, an arm assembly having a first end and a second end, the first end connected to the frame, an implement connected to the second end, and a linkage connecting the implement to the second end of the arm assembly. The linkage includes a pin-supporting section configured to accept a pin and a linking section attached to the pin-supporting section by a weld. The linking section includes a recess proximate to the weld.