Abstract:
Cost for a direction switching valve (third direction switching valve is) reduced while oil is supplied from two pumps to one actuator (third actuator). A hydraulic circuit 30 for construction machinery includes a first unloading passage 31 connected with a first pump 11, a second unloading passage 32 connected with a second pump 12, a first supply passage 41 connected with the first pump 11, a second supply passage 42 connected with the second pump 12, a third supply passage 43, and third direction switching valves (53E and 53F). The third supply passage 43 is connected with the first supply passage 41 and the second supply passage 42. The third direction switching valves (53E and 53F) are connected with the third supply passage 43, the first unloading passage 31, the second unloading passage 32, and the tank passage 35, and supply and discharge oil to and from the third actuators (23E and 23F).
Abstract:
Die Erfindung betrifft einen Arbeitszylinder umfassend eine Kolben-Zylindereinheit mit wenigstens einem Druckanschluss, einer integralen Ventilanordnung zur Steuerung des Druckvolumenstroms von dem Druckanschluss in den Zylinderraum und einer integrierten Steuer- und/oder Regeleinheit zur Betätigung der Ventilanordnung.
Abstract:
Ce dispositif a pour but de fournir des moyens permettant de transformer un engin de chantier ou agricole en un engin comportant un dispositif de changement rapide de l'outil. Il comporte un élément mâle (1) destiné à être fixé sur l'outil (26) et un élément femelle (9) destiné à être fixé sur le bras (25) de l'engin. L'élément mâle (1) comporte un V destiné à s'encastrer dans un autre V porté par l'élément femelle (9).
Abstract translation:该装置的目的是提供一种装置使其能够施工或农用车辆转换成具有改变的实现了一个快速动作装置的车辆。 它包括用于一个阳元件(1)被紧固到所述工具(26)和(9)旨在在阴元件被紧固到所述车辆的所述臂(25)。 阳元件(1)包括用于装配到由阴元件(9)中进行另一V A V。
Abstract:
Es wird eine mobile Arbeitsmaschine (7), insbesondere Radlader, Teleskoplader, Bagger oder dergleichen, mit einem Fahrwerk (21) und einem Tragrahmen (22), wobei der Tragrahmen (22) auf dem Fahrwerk (21) angeordnet ist, wobei wenigstens eine Antriebseinheit zum Antreiben wenigstens eines Antriebselementes des Fahrwerks (21) vorgesehen ist, wobei der Tragrahmen (22) wenigstens eine Werkzeughaltevorrichtung (3) zum Halten eines Arbeitswerkzeugs (18) umfasst, wobei die Werkzeughaltevorrichtung (3) wenigstens eine um eine Schwenkachse verschwenkbare Tragvorrichtung (3) umfasst, wobei eine wenigstens eine Hydraulikflüssigkeit und eine Hydraulikleitung umfassende Hydraulikeinheit zum Betätigen und/oder Druckbeaufschlagen der Werkzeughaltevorrichtung (3) und/oder der Tragvorrichtung (3) und/oder des Arbeitswerkzeugs (18) und/oder des Antriebselementes vorgesehen ist, vorgeschlagen, wobei die Nachteile des Stands der Technik wenigsten teilweise verbessert werden, insbesondere ein gegenüber dem Stand der Technik erheblich schwingungsärmeres Arbeiten realisierbar ist. Dies wird erfindungsgemäß dadurch erreicht, dass wenigstens ein Tragrahmen-Schwingungssensor (15) zum Erfassen von Schwingungen des Tragrahmens (22) vorgesehen ist.
Abstract:
Hydraulic equipment of the type that can be fixed to a moving arm of an operating machine. The equipment has a support structure connected or connectable to a moving arm of an operating machine, at least one hydraulic motor for the rotation of a working element, a feed pipe connected or connectable to a hydraulic circuit of the supporting operating machine to supply a flow of working fluid to the hydraulic motor, and a drainage unit for the drainage of working fluid from the hydraulic motor. The equipment may optionally include a pressure detector in the drainage unit and a shut-off valve operationally associated with the pressure detector in such a way as to interrupt the flow of working fluid to the hydraulic motor when predetermined pressure conditions are detected.
Abstract:
Cost for a direction switching valve (third direction switching valve is) reduced while oil is supplied from two pumps to one actuator (third actuator). A hydraulic circuit 30 for construction machinery includes a first unloading passage 31 connected with a first pump 11, a second unloading passage 32 connected with a second pump 12, a first supply passage 41 connected with the first pump 11, a second supply passage 42 connected with the second pump 12, a third supply passage 43, and third direction switching valves (53E and 53F). The third supply passage 43 is connected with the first supply passage 41 and the second supply passage 42. The third direction switching valves (53E and 53F) are connected with the third supply passage 43, the first unloading passage 31, the second unloading passage 32, and the tank passage 35, and supply and discharge oil to and from the third actuators (23E and 23F).
Abstract:
According to the present invention, a hydraulic system of construction equipment is implemented as a close center system, which converts an input signal of an electric or hydraulic joystick into a speed signal of a work apparatus, and controls a speed of the work apparatus regardless of an external load condition, thereby minimizing fatigue of a worker to improve work efficiency, improving a work apparatus operation ability of an unskilled person, and patterning standardized work to implement automation of construction equipment.
Abstract:
A control system for construction machinery includes a first hydraulic pump (100), first and second actuators (20) connected to the first hydraulic pump through first and second hydraulic lines (220,222) respectively and operable by a working oil discharged from the first hydraulic pump, first and second control valves (320,322) installed in the first and second hydraulic lines respectively and configured to control operations of the first and second actuators, a first spool displacement adjusting valve (420) supplying a pilot signal pressure to a spool of the first control valve (320) in proportion to an inputted control signal to control a displacement amount of the spool of the first control valve, and a controller (500) configured to output the control signal to the first spool displacement adjusting valve (420) corresponding to a manipulation signal (600) of an operator, and configured to adjust a spool displacement amount of the first control valve (320) according to an amount of the working oil to be supplied to the first actuator (20) when the first actuator performs a single or multiple operation by self-load.