HYDRAULIC OPERATING DEVICE AND GEARBOX PROVIDED WITH SUCH AN OPERATING DEVICE

摘要

Hydraulic operating device, in particular for the operation of a selector fork (40) of a gearbox, and gearbox provided with such an operating device. The device comprises a double-acting cylinder (1), which is coupled to the selector fork (40), and a reversible pump (2). The pump is connected to the working chambers (11, 12) of the cylinder (1) by supply lines (9, 10). A valve (14, 15) is mounted in each of the supply lines (9, 10) which is operated by fluid flow. This valve (14, 15) comprises a body, a bore formed in the body, a piston, which divides the bore into two chambers, a through-channel, formed in the piston and designed as a flow orifice, connecting the two chambers.