Hydraulic steering device

摘要

A hydraulic steering device (1) is described comprising a supply port arrangement having a supply port (P) and a tank port (T), a working port arrangement having two working ports (L, R), a main flow path (14) between the supply port (P) and the working port arrangement, a return flow path (16) between the working port arrangement and the tank port (T), flow meter means (15) being arranged in said main flow path (14), said flow meter means (15) comprising at least two flow meters (27, 28) and a flow meter valve means (30), said flow meter valve means (30) in a first operation mode connecting at least two flow meters (27, 28) in parallel and in a second operation mode making inactive at least one flow meter (27). Such a steering device should be operated comfortable for a driver. To this end an amplification flow path (17) is arranged in parallel to said main flow path (14), said amplification flow path (17) being connected to said main flow path (14) downstream said flow meter means (15) in a direction from said supply port (P) to said working port arrangement.

主权项

1. A hydraulic steering device comprising
a supply port arrangement having a supply port (P) and a tank port (T), a working port arrangement having two working ports (L, R), a main flow path between the supply port (P) and the working port arrangement, a return flow path between the working port arrangement and the tank port (T), flow meter means being arranged in said main flow path, said flow meter means comprising at least two flow meters and flow meter valve means, said flow meter valve means in a first operation mode connecting at least two flow meters in parallel and in a second operation mode making inactive at least one flow meter, wherein an amplification flow path is arranged in parallel to said main flow path, said amplification flow path being connected to said main flow path downstream said flow meter means in a direction from said supply port (P) to said working port arrangement.