An excavator arm for an excavator as a link between excavator boom and attachment, wherein the excavator arm substantially is formed by a box-like sheet metal construction, and wherein at least one bearing plate is applied onto an end plate of the sheet metal construction.

An excavator attachment is attached to a rotating platform of an excavator. A display unit visually displays a predicted stability indicating stability of the posture of the excavator after the excavator is manipulated.

A stabilizer system includes a first object that moves relative to a second object and includes a first actuator coupled to a first wear pad. The first actuator drives the first wear pad to contact a first side of the second object to control motion of the first object relative to the second object. The first actuator operates in a first mode and in a second mode. While operating in the first mode, the first actuator applies a first force to the first wear pad to block the motion of first object relative to the second object. While the first actuator is operating in the second mode, the first actuator applies a second force, lower than the first force, to the first wear pad to enable the motion of the first object relative to the second object.

An excavator attachment is attached to an excavator rotating platform. During normal operation, a drive means drives the attachment according to operator input into a manipulation device. A sensor detects motion of the excavator. Based on output of the sensor, a slip suppression unit detects slipping of the excavator undercarriage in an extension direction of the attachment, and corrects operation of the attachment performed by the drive means.

A dipper door trip assembly includes a dipper, a dipper door pivotally coupled to the dipper, a linkage assembly including a sliding latch bar disposed at least partially in the dipper door, and a latch keeper coupled to the dipper. The latch keeper includes a roller that engages and disengages the latch bar.

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 working machine includes a controller device to set an allowable-stroke range of the arm cylinder moving the arm toward the boom depending on a turn position of the boom such that a shortest trajectory distance that is a shortest distance between the boom cylinder and a turn trajectory of the tip end portion of the bucket is kept at a predetermined value even when the turn position of the boom changes, in a case where the boom is turned in a direction separating from a boom reference position.

A digging machine such as a face shovel is controlled in an automated dumping sequence in which the bucket is pivoted to a first angular orientation before opening and, optionally, re-orienting to a second, slightly more forwardly inclined angular orientation. The first orientation may relieve the front part of the bucket from the load while the second orientation is selected to discharge the load at an optimal trajectory. The bucket may move to a third angular orientation before closing the front part against gravity.

A tool holder includes a locking cylinder provided with two first gripping pins extending laterally from each side of the fixed part thereof, and two second gripping pins extending laterally from each side of the moving part thereof. The tool includes at least two reception assemblies each having a first receiving portion and a second receiving portion the openings of which are each facing and provided to receive one of the first gripping pins and one of the second gripping pins for retaining the tool on the tool holder. The tool is locked on the tool holder by means of the locking cylinder by moving each gripping pin into abutment at the bottom of the associated receiving portion thereof.

A boom mounting assembly for attachment to an agricultural machine is disclosed, which may comprise a primary frame, and a boom support frame configured to support a boom and being suspended from the primary frame to pivot in a transverse plane around a longitudinal axis of rotation provided in a pivot point. The boom support frame may comprise a first sub-frame connected to the primary frame; a second sub-frame supported by the first sub-frame in support sections provided on opposite sides of the pivot point in a transverse direction; and an actuator connected to the sub-frames and operable such that the support sections move relative to the pivot point to increase and decrease, in the transverse direction, a respective distance on opposite sides of the pivot point at the same time. Further, a method for controlling operation of a boom mounting assembly attached to an agricultural machine is provided.