| 摘要 |
The external concentric aircraft brake piston adjuster assembly (10, 100, 200) comprises in a piston housing (12, 112, 212) a housing bushing bore (19, 119, 219) having disposed slidably therein a brake piston (30, 130, 230) with a shoulder (35) abutted by a deformable member or adjuster tube (40, 140, 240) of the assembly (10, 100, 200). The deformable member (40, 140, 240) has a second end (42, 142, 242) extending exteriorly of the bore (19, 119, 219) and is engaged by a brake piston adjuster (11, 11', 11'', 111', 211') that includes a radially inwardly extending end (54) of a deforming member or collar member (50). Collar member (50) has a first end (51) comprising a plurality of axially extending fingers (52) which are received within axially extending slots (21) of a housing bushing (14), and located between the slots (21) are a plurality of bushing splines (23). The splines (23) include a threaded exterior diameter area which receives threadedly a nut member (60) located around the collar member (50). The collar member (50) includes the first end (51) disposed opposite and adjacent a first end (62) of the nut member (60), first ends (51, 62) including steps (53, 63) receiving and positioning a resilient member or disc spring (70). As the piston (30) is displaced axially from the bore (19) by hydraulic brake pressure, the deformable member (41) travels with the piston (30) and displaces the collar member (50) relative to the nut member (60) and housing (12), to take up a piston return stroke clearance ("X"). As displacement of the piston (30) and adjuster tube (40) extends beyond the clearance ("X"), the collar member (50) deforms the adjuster tube (40) to effect an adjusted position of the piston (30) relative to the housing (12). At the termination of braking, the resilient member (70) biases the collar member (50), adjuster tube (40) and piston (30) to an at-rest position. The resilient member (70, 170, 180, 280) can comprise either a low modulus, high strength flexible tube (170, 180) having a plurality of circumferentially extending openings (172, 182) or a bellows spring (280).
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