Bremsvorrichtung für eine Linearführung

摘要

A braking device for a linear drive, comprising a support body (1) which may be moved along a guide rail (2) including brake blocks acting thereon and a brake piston (8) placed in a brake cylinder (9) of said support body (1) so that it is moved by a pressurised fluid. Said braking device also comprises, as the braking energy accumulator, a compression spring (11) acting on said pressurised fluid of which the volume is limited by said brake piston (8). According to the invention, a piston-cylinder assembly is provided between said compression spring (11) and said brake piston (8), with a unitary control element comprising, in a control pressure chamber (4), a large-diameter moveable control piston (5) facing said pressure spring (11), and, in a high-pressure chamber (3), a small-diameter moveable high-pressure piston facing said brake piston (8), wherein a pressurised fluid connecting element is arranged on said support body (1) for feeding said pressurised fluid into said control pressure chamber (4).