A hydraulic system for a work machine, which includes a first hydraulic pump to deliver operation fluid, a second hydraulic pump to deliver pilot fluid, a first hydraulic actuator configured to control flow rate of the operation fluid based on the pilot pressure applied to the pressure receivers, a manual operator configured to operate the first hydraulic actuator, having an operation lever to move toward both directions, operation valves to change pressure of the pilot fluid in accordance with movement of the operation lever, and a discharge fluid tube to drain the pilot fluid from the operation valves. The hydraulic system includes an actuating valve in the discharge fluid tube and configured to reduce pressure of the pilot fluid in the discharge fluid tube.

A fastening device for wear elements in earth-moving machines, related to a fastening device of the type that is arranged between two parts, components or elements of an earth-moving machine for the fastening or coupling between both parts or elements. The device has at least one mobile blocking element and autonomous activation mechanism of the mobile blocking element, which enables the mobile blocking element to be activated such that, once the fastening device is inserted in a housing for this purpose in any of the parts to be coupled, the effective coupling is achieved at a certain distance from the fastening device, and even from the machine.

A machine includes a rotational sensor configured to sense rotation of an upper frame of the machine relative to a lower frame of the machine. The machine also includes a three-dimensional position sensor spaced from an axis of rotation of the upper frame relative to the lower frame. The machine can also include a number of additional sensors including sensors to detect track movement, imaging sensors, ranging sensors, IMUs, linear displacement sensors and/or the like. A computing system receives the various inputs from the sensors and fuses the data to determine state information for the machine.

A construction machine including a variable displacement pump, and a boom cylinder including a rod operable to extend and retract to move a boom of the construction machine. A first chamber of the boom cylinder is configured to be supplied with fluid from the pump during rod extension while fluid is removed from a second chamber of the boom cylinder. The second chamber of the boom cylinder is configured to be supplied with fluid from the pump during rod retraction while fluid is removed from the first chamber of the boom cylinder. The construction machine has an active ride control mode in which a valve between the boom cylinder and the pump remains open, and the pump is configured to actively damp pressure fluctuations in the boom cylinder by variation of a displacement setting.

Disclosed are a working machine control method and a device, and a working machine. The method includes: obtaining a current working state of a working machine; determining a current decision behavior of the work machine based on the current work state and a state-behavior decision model; and controlling, based on a control signal corresponding to the current decision behavior, the work machine to perform construction work. The state-behavior decision model is based on a sample working state, a sample decision behavior, and a reward value corresponding to the sample decision behavior. The reward value is determined based on an actual position curve and target position curve; the actual position curve is determined based on the sample decision behavior. The method, device and working machine reduce the adjusting workload of engineers, shorten the adjusting time, reduce the adjusting cost, and improve the intelligent construction level of the working machine.

The present disclosure discloses an engineering machinery equipment, and a method, system, and storage medium for operation trajectory planning thereof, and relates to the field of artificial intelligence, automatic control, and engineering machinery technologies. A method can include: acquiring three-dimensional sensing data of a material pile, to construct a three-dimensional model of the material pile based on the three-dimensional sensing data; determining a loading operation position of the engineering machinery equipment on the material pile based on the three-dimensional model of the material pile and structural design information of the engineering machinery equipment; and acquiring position information of a mechanical structural component of the engineering machinery equipment, and performing operation trajectory planning based on the position information of the mechanical structural component and the loading operation position, to generate an operation trajectory of the mechanical structural component executing a material loading operation.

A shovel includes a cabin, a display device attached to the cabin, and a main pump. An internal combustion is configured to drive the main pump. An information acquiring device is provided. A controller is configured to calculate an amount of work based on the information acquired by the information acquiring device and to cause the display device to display the amount of work per predetermined period of time in a chronological order.

A drive transmission device according to one embodiment of the disclosure includes a single differential unit to which rotation of a motor is transmitted and two speed reducers each having an operation output shaft that is coupled to the differential unit and a carrier that changes a speed of the rotation of the operation output shaft and outputs the rotation. The two speed reducers are arranged such that they are opposed to each other along a second rotation axis, and the operation output shaft and the carrier in each speed reducer are aligned in the second rotation axis direction.

A work tool identification system for identifying the work tool attachment attached to a machine from among a plurality of interchangeable work tool attachments utilizes a data transmission device located on the work tool attachment and an electronic machine controller that may be located on the machine. The data transmission device may store work tool identification data and may measure an interval count indicative of the lapsed time since the work tool attachment was initially moved by a machine. The electronic machine controller generates and sorts a work tool identification list of the plurality of work tool attachments based on the interval count with the lowest interval count appearing before any higher interval counts that is indicative of a recently coupled work tool.

A collision avoidance system for a work machine includes at least one sensor configured to generate a signal indicative of a presence of at least one obstacle in a surrounding area of the work machine, at least one imaging device, a display device, and a controller. The controller receives the signal indicative of the presence of the obstacle and determines a position of the obstacle relative to the work machine based on the signal received from the sensor. The controller generates a first control signal to prevent a movement of the work machine, halt the movement of the work machine, or reduce a velocity of the work machine based on the determination of the position of the obstacle. The controller generates a second control signal for displaying an updated display view that provides a visual indication of the presence of the obstacle in the surrounding area of the work machine.