A quick hitch for mounting an implement on a machine. The quick hitch has at least one mounting means for connection to a machine and a securing means for securing the quick hitch to an implement. The quick hitch also has at least one removable plate for engagement with a surface of an implement.

A quick hitch for mounting an implement on a machine includes mounting means for connection to a machine and a securing means for securing the quick hitch to an implement. The securing means includes an over-center mechanism and a locking member. The over-center mechanism includes a first member pivotal at a axis D relative to a chassis, a first end of a first link pivots at axis E relative to a first arm of the first member, and a second end of the link pivots at axis F member. When the securing means in a first position with the hitch secured to an implement, axis E lies on a first side of a line between axes D and F. When in a second position with the hitch unattached, axis E lies on a second side of a line between axes D and F.

A coupler for a wheel loader is used for coupling an attachment (102) to a lifting arm of the wheel loader. A bracket (100) is installed between the lifting arm and the attachment (102). The bracket's back face is pivotally connected to a lifting arm and the bracket's front face is detachably connected to the attachment (102). The attachment (102) has a pair of protrusions (104a,104b) rearwardly extending from the lower back of the attachment (102) and have locking holes pierced through their width. The bracket has a pair of receiving slots (108a,108b) formed at the lower front of the bracket and engaged with the protrusions(104a,104b). The coupler has a shaft (202), and a pair of locking pins (204a,204b) combined with the shaft by threads (216a,216b). The threads (216a,216b) formed at one end of the shaft (202) are right handed and the threads (216a,216b) formed at the other end of the shaft (202) are left handed. When users turn the shaft (202) in one direction,the locking pins (204a,204b) are extended and engaged with the locking holes (a coupling position). When users turn the shaft in the other direction,the locking pins are shortened and released from the locking holes (a release position).

A work tool coupler for a work vehicle may include a rigid body, a retention pin, a four-bar linkage, and a lever. The retention pin may be configured to engage a work tool when the coupler is in an engaged position. The four-bar linkage may include a first member pivotally connected to the retention pin and at least one of a second member and a third member, the second member pivotally connected to at least one of the first member and the third member, the third member pivotally connected to at least one of the first member and the second member and a fourth member, and the fourth member pivotally connected to the third member. The lever may be attached to the fourth member.

A bucket attaching structure of a construction machine and a construction machine including a fixed jaw portion attached to a distal end portion of an operation arm and a movable jaw portion attached to a distal end portion of a piston through a bucket link. The fixed jaw portion and the movable jaw portion are each partially open and each include a semicircular arc-shaped engagement portion that corresponds to an outer peripheral surface of a corresponding bucket connecting pin. The bucket attaching structure of a construction machine and the construction machine include semicircular arc-shaped closure portions that each support the bucket connecting pins together with the semicircular arc-shaped engagement portions by, after engaging each semicircular arc-shaped engagement portion with the corresponding connecting pin, closing a partially open side of the corresponding semicircular arc-shaped engagement portion of the fixed jaw portion and that of the movable jaw portion.

A manual locking subassembly for a loader system of a utility vehicle includes an actuator manually operable from an operator cab of the vehicle and a mechanical linkage extending from the actuator and affixed to a loader attachment carrier rotatable about an axis. Manipulation of the actuator in a first direction moves a linkage member of the mechanical linkage from a first position in which a loader attachment implement is uniformly movable with the attachment carrier to a second position in which the loader attachment implement is non-uniformly movable with the loader attachment carrier.

A device forming a coupler including a coupler, or quick-release fastener for attachment to a construction machine, such as a mechanical shovel; a connection device for attachment to a tool, such as a bucket; coupling means to couple the quick-release fastener to the connection device; and locking means to lock the coupling; the connection device including at least one trunnion and preferably two trunnions parallel with one another, the coupler including a base body defining a rear receiving cavity for at least one of the trunnions, characterised in that the coupler includes a lever mounted to pivot between a closed position holding one of the trunnions in the rear receiving cavity and an open position in which it does not hold the trunnion, the locking means being arranged to block or prevent rotation of the lever in the closed position.

Quick-release fastener including a first connection part for attaching to a tool and a second connection part for attaching to an arm of a machine, the first part including a base plate with a front and rear edge, a coupling pin or hook protruding from the lower face of, and a locking hook protruding from the upper face of, the base plate. The second part includes a hook or pin to couple to the coupling pin or hook of the first part, and a slidably mounted locking plate, the locking hook of the first part passing through a through-opening formed in the slidable locking plate of the second part to hook to an edge of the opening once the locking plate has slid to lock the quick-release fastener device. The front edge of the base plate of the first part defines a notch, in particular in a flared shape.

Quick-release fastener device for attaching a tool to an arm of a machine including a first part and a second part, the first part including a base plate having front and rear edges, a coupling hook or pin protruding from the lower face of the base plate, and a locking hook protruding from the upper face of the base plate. The second part includes a pin or hook to couple to the coupling hook or pin of the first part; a base plate; and a slidable locking plate, the locking hook of the first part passes through the slidable locking plate to hook to an edge of the opening once the locking plate has slid to lock the device. Two prominences, one right and one left, project from the front of the base plate of the first part.

A quick coupler for changing attachments on a construction machine includes a carrier; first receptacles arranged on one side of the carrier for a first coupling element; second receptacles arranged on the other side of the carrier for a second coupling element; a locking device associated with the first receptacles, the locking device movable between release and locking positions; and a catch device arranged on the carrier with at least one catch hook arranged pivotably on the carrier for catching the attachment. A control element is arranged on the catch hook for pivoting the catch hook, independently of the locking device, between a folded-down change- and catch position and a folded-up safety position. The catch hook is pushed into its folded-down change- and catch position by a spring assembly.