Hydraulic excavator
Номер патента: DE3802083A1
Опубликовано: 13-07-1989
Автор(ы): Josef Schropp
Принадлежит: Liebherr Hydraulikbagger GmbH
Опубликовано: 13-07-1989
Автор(ы): Josef Schropp
Принадлежит: Liebherr Hydraulikbagger GmbH
Реферат: A hydraulic excavator has a boom mounted in the revolving superstructure and pivotable by a boom cylinder. A dipper arm pivotable by a dipper-arm cylinder is linked to the boom. An implement, preferably a bucket, is linked on the one side to the dipper arm and on the other side to a bucket-tipping cylinder, preferably via a shift lever, mounted on the dipper arm, and a connecting rod. A synchronous control system is used for the follow-up of the pivoting movement of a member as a predetermined function of the pivoting movements of two other controlled members. In order to create a hydraulic excavator of this type which is provided with a synchronous control system which is of simple construction, can be adapted to conventional hydraulic excavators in a simple manner and is simple to change in its characteristic, an angle transmitter (23) is arranged between the revolving superstructure and the boom or between the boom and the dipper arm (9) or the implement or the shift lever (14) and the dipper arm (9). In accordance with the signals produced by the angle transmitter (23), a control device controls the cylinder of the third member, the angular position of which is not detected by the angle transmitter (23), as a predetermined function of the measured angle (Fig. 3). <IMAGE>
Hydraulic Drive Device for Large Hydraulic Excavator
Номер патента: US20100162696A1. Автор: Yoshinori Furuno,Kenji Kakizawa. Владелец: HITACHI CONSTRUCTION MACHINERY CO LTD. Дата публикации: 2010-07-01.