Problem to be solved: To provide a hydraulic circuit for the construction machine which enables to use the relief valve of low capacity in the work tool circuit. Solution: The hydraulic circuit 2 for a construction machine has: a hydraulic pump 4 of variable capacity, a work tool 6 operated by hydraulic oil delivered by the hydraulic pump 4, a work tool operating device 10 to output a signal for operating the work tool 6, a control valve 14 allowing the hydraulic pump 4 to supply the hydraulic oil to the work tool 6 based on the signal output from the work tool operating device 10, a tool's relief valve 44 to release the hydraulic oil flowing between the control valve 14 and the work tool 6, a pressure sensor 46 to detect a pressure of hydraulic oil flowing into the work tool 6, and a controller 48 to reduce a delivery rate from the hydraulic pump 4 when the pressure detected by the pressure sensor 46 exceeds a predetermined value.

A quick coupler for construction machines. An embodiment of the quick coupler comprises a housing with two opposing longitudinal walls, two opposing transverse walls, a top side, a bottom side, and a block cylinder inside the housing. The quick coupler may also comprise a locking device with a locking bolt and a drive device. The locking bolt protrudes from one of the two transverse walls in a locked position. The quick coupler may also comprise a first coupling element having a coupling end section and a second coupling element having a coupling end section hydraulically connected to one another, wherein the second coupling element is arranged on one of the two longitudinal walls of the housing.

A support and guiding apparatus for feeder lines includes a feeding tube for a digging device, a support branch, and a plurality of crosspieces adapted for guiding the feeding tube and connected to the support branch. The support branch includes a single flexible traction element and a plurality of spacer elements coupled to the single flexible traction element. The flexible traction element defines a longitudinal axis X when the flexible traction element is in an extended configuration. The flexible traction element has a cross section S having a width B greater than a height H. Each one of the spacer elements has a first seat housing the flexible traction element and which is crossed by the flexible traction element. The first seat is shaped to prevent rotation of the spacer element. Each one of the spacer elements is arranged to allow rotation of the support branch.

An embodiment of the present disclosure provides a construction machine, which includes a boom, the construction machine including a boom cylinder configured to move the boom upward or downward and includes a head side and a rod side, a boom regeneration valve configured to control a flow rate of a working fluid discharged from a head side of the boom cylinder, an operating device configured to generate an operating signal for operating the boom, an accumulator configured to store the working fluid discharged from the boom cylinder, a regeneration motor configured to produce renewable energy by performing a regenerative operation by using the working fluid discharged from the boom cylinder or the working fluid discharged from the accumulator, and a control device configured to correct an opening area of the boom regeneration valve on the basis of pressure of the accumulator when the boom descends.

A working machine includes: a machine body; an operator's seat; an operation device to pivot on a pivot shaft that extends in a width direction; and a working device to be operated using the operation device. The operation device includes an operation lever and a control valve to be operated using the operation lever and connected to hydraulic hoses. The control valve includes a valve member to be actuated by operating the operation lever, and a block containing fluid passages through which fluid selectively flows upon actuation of the valve member. The fluid passages bend such that first ports in an upper surface of the block facing the valve member and second ports in a peripheral surface extending from a periphery of the upper surface are in communication with each other. The hydraulic hoses are connected to the second ports and extend in a direction away from the peripheral surface.

A hose assembly for a hydraulic system is shown. The hose assembly includes a first hose that fluidly couples a pump with a hydraulic actuator using a first port. The first hose includes a first electronic device that provides identification information for the first hose. The hose assembly further includes a second hose that fluidly couples the hydraulic actuator with a reservoir tank using a second port. The second hose includes a second electronic device that provides identification information for the second hose. The hose assembly further includes a controller that receives a first connection signal and a second connection signal. The controller is further configured to determine that the first hose has fluidly coupled using the first port based on the first connection signal and determine that the second hose has fluidly coupled using the second port based on the second connection signal.

A shovel that corrects the movement of an attachment regardless of the operating state of the attachment by an operator is provided. The shovel includes a traveling body, a turning body turnably mounted on the traveling body, an attachment attached to the turning body, a hydraulic actuator configured to drive the attachment, and a controller. The controller is configured to control the hydraulic actuator to minimize a change in orientation of the traveling body or of the turning body, in response to a change in moment caused by an aerial movement of the attachment.

An auxiliary hydraulic manifold for connecting different implements to a work vehicle for hydraulic control may include a housing, a plurality of vehicle-side ports in the housing including a first vehicle-side port, and a plurality of implement-side ports in the housing including a first implement-side port fluidly coupled to the first vehicle-side port and a second implement-side port fluidly coupled to the first vehicle-side port. A number of the plurality of implement-side ports is greater than a number of the plurality of vehicle-side ports. Additionally, the auxiliary hydraulic manifold may include a pilot-operated check valve fluidly coupled between the first vehicle-side port and the first implement-side port.

A hydraulic tool is mountable to a prime mover. The hydraulic tool includes a bore-side hydraulic pressure sensor, a rod-side hydraulic pressure sensor, a control circuit, a wireless transmitter antenna providing a communication channel to a user interface, and a protective box assembly housing the bore-side hydraulic pressure sensor, the rod-side hydraulic pressure sensor, the control circuit, and the wireless transmitter antenna.

A system for replacing an original hose assembly of a work machine with a replacement hose assembly includes at least a computing device, a database, and a server. The server is associated with the database and includes a processor configured via computer-executable instructions to perform a method of identifying the replacement hose assembly. The method includes prompting a user to select hose attributes associated with a hose of the original hose assembly. Based on the selected hose attributes, a replacement hose may be identified. The method further includes prompting the user to select coupling attributes associated with a coupling of the original hose assembly. Based on compatibility with the identified replacement hose and the selected coupling attributes, a replacement coupling may be identified. The method further includes generating a bill of materials for the replacement hose assembly and displaying the bill of materials.