| 摘要 |
<p>The system has a piston (3) axially sliding in an air brake cylinder (4) for pressing on a brake shoe by a support surface (30). The piston moves in the cylinder when a pressurized fluid is injected in the cylinder by an inlet access. The piston has an axial cavity (31), whose opening is situated on an opposed side to the surface. The cylinder possesses a housing (51) containing a taper piece (50) that includes a core (32) with outer surface (34). The surface (34) is situated in the cavity according to an axis of the cavity, and the taper piece moves on the surface of core by friction.</p> |
