A control device and method for controlling a disengaging actuator (1) of a tool attachment, the device comprising a three-state switch (2), with a middle neutral position (20), a first end position (21), and a second end position (22), a control unit (3, 3′) having an input corresponding to an activation of the first end position (21), an electro-valve (4) coupled hydraulically to the disengaging actuator (1), having a coil (40), a first control line (41) and a second control line (42) coupled respectively to first and second terminals of the coil (40) of the electro-valve, wherein one of the first and second control lines is coupled to the second end position (22) of the three-state switch and the other of the first and second control lines is coupled to an output of the control unit, such that both control lines have to be activated to allow disengagement.

An excavator coupler including a front jaw for receiving a first attachment pin of an accessory and a rear pin receiving area for receiving a second attachment pin of the accessory, a first closure mechanism for the rear pin receiving area, the first closure mechanism including an actuator and a movable second pin engaging surface for selectively securing the second attachment pin in the rear pin receiving area and for pulling the first attachment pin into the front jaw of the coupler, a second closure member for the front jaw for selectively retaining the front attachment pin in the front jaw, and a front latch control component for selectively controlling the second closure member between an open state and a closed state wherein the actuator includes a release member for selectively engaging a release arm on the front latch control component to activate or deactivate the front latch control component.

A removable tool assembly for a backhoe digging apparatus of a construction equipment machine having spaced apart parallel first and second fastening pins is disclosed. The removable tool assembly includes an attachment mechanism for releasably attaching the removable tool assembly onto the backhoe digging apparatus, the attachment mechanism including: a first attachment element having first receiving areas adapted to receive the first fastening pin, and a second attachment element having second receiving areas adapted to receive the second fastening pin, wherein the second attachment element is movable relative to the first attachment element between a first position, in which the first and second fastening pins can be removed from the first and second receiving areas.

A method of coupling a tool to a work machine including inserting a front lug of a coupling assembly into a front recess on the tool, inserting a rear lug of the coupling assembly into a rear recess on the tool, moving a retaining member of the coupler assembly to a retaining position relative to the tool to releasably mount the tool to the work machine, while simultaneously preventing movement of a hydraulic coupling manifold on the coupling assembly from moving; and moving the hydraulic coupling manifold to a coupling position with a hydraulic power transmission coupling on the tool to hydraulically couple the tool to the work machine in response to the retaining member reaching the retaining position.

An attachment assembly for use with a work machine includes an attachment adapter coupled to the work machine and fixed relative thereto and an attachment frame including a member defining an attachment point configured to engage, into an engaged mode, with the attachment adapter when a front suspension system of the work machine is raised to a raised position, and configured to disengage, into a disengaged mode, from the attachment adapter when the front suspension system is lowered to a lowered position, the attachment adapter configured to travel with the work machine when in the engaged mode and the disengaged mode, and the attachment frame configured to travel with the work machine when in only the engaged mode.

A quick-change device for changing attachments on a construction machine comprises a main body and parallel lateral flanks with oppositely disposed first and second bearing bushings for receiving mounting pins. To expand the range of applications, at least two oppositely disposed first bearing bushings can be inserted at different angular positions into first oppositely disposed passage openings in the lateral flanks by rotating the bearing bushings about an axis, which is offset relative to a central axis of a receiving hole of the first bearing bushing, and have an external contour for rotationally rigid engagement in a complementary internal contour of the passage opening.

There is described a bracket for mounting an excavation bucket on a coupler of an articulated arm. The bracket comprises a body extending in a plane and having a central portion. This bracket allows reversible mounting of the coupler of the excavation bucket by providing two pairs of adjacent concavities at a front and at a rear portion of the body which can alternately hold a corresponding pair of hinge shafts of a coupler in either orientation. Abutments at the front and at the rear are provided to further retain the coupler in the mounting bracket in either configuration. A bottom of the mounting bracket comprises notches that fit with corresponding portions of the bucket for improved securing of the bucket assembly on the mounting bracket.

Attachment assembly for use with a work machine. The attachment assembly includes an attachment adapter and an attachment frame. The attachment adapter is coupled to the work machine and fixed relative thereto. The attachment frame includes a member that defines an attachment point. The attachment point engages, into an engaged mode, with the attachment adapter when a front suspension system of the work machine is raised to a raised position. The attachment point disengages, into a disengaged mode, from the attachment adapter when the front suspension system is lowered to a lowered position. The attachment adapter travels with the work machine when in the engaged mode and also in the disengaged mode. The attachment frame travels with the work machine only when in the engaged mode.

A coupler control system (10) for coupler on an excavator arm (14) of an excavator (12), the coupler comprising a hydraulic actuator (60), the excavator comprising a solenoid valve (20) for controlling operation of the coupler's hydraulic actuator (60), the excavator arm (14) comprising a boom arm (36) and a stick (40), both operated by separate hydraulic actuators, and a bucket actuator (44) for rotating an accessory relative to the stick (40), the coupler control system (10) comprising a controller linked to the solenoid valve (20) for controlling operation of the coupler's hydraulic actuator (60), a status indicator (22), a coupler control switch (24) for locating in the cab of the excavator and a pressure sensor (28) for connecting to the hydraulic system for at least one of the hydraulic actuators for the boom arm, the stick or the bucket actuator, wherein the coupler control switch and the status indicator are connected to the controller, the pressure sensor is arranged to sense when the hydraulic fluid of the hydraulic system is at a pressure less than a predetermined pressure signifying a grounding of the coupler, the controller is connected to the pressure sensor to detect that sensed state of the pressure and the controller is arranged, in response to that detection, to provide an indication to the operator via the status indicator.

The invention relates to a removable tool assembly for a backhoe digging apparatus of a construction equipment machine having spaced apart parallel first and second fastening pins, said removable tool assembly including an attachment mechanism for releasably attaching said removable tool assembly onto the backhoe digging apparatus, the attachment mechanism including:—a first attachment element having first receiving areas adapted to receive the first fastening pin, and—a second attachment element having second receiving areas adapted to receive the second fastening pin, wherein the second attachment element is movable relative to the first attachment element between a first position, in which the first and second fastening pins can be removed from the first and second receiving areas.