| 摘要 |
The invention proposes a hydraulic device for the selection and transmission of a pressure signal in a block-type directional control valve (11) for the purpose of load-pressure-independent control, in which the housing (31) of the directional control valve can be used unmodified for a so-called right-hand (10) and a so-called left-hand embodiment (27). The housing (31) has a recess (52) like a blind hole which is introduced from one flange base (53), accommodates an insert (58) carrying a shuttle valve (21) and to which two control conduits (55, 56) are taken. Of the three ports of the shuttle valve (21), the central port (25) for transmitting the higher of the different pressure signals fed to the two lateral ports (23, 24) can, with the aid of the insert (58) be relocated in the flange base (53) of the housing (31) or in the bottom (54) of the recess (52). In a first variant (Figure 3, 4), a right-hand embodiment can be used as a left-hand embodiment (Figure 5) by reverse arrangement of two bores (67, 69) in the insert (58), while, in a second variant (Figure 7), another installation position of the same insert (81), makes possible the other embodiment. <IMAGE> |
