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公开(公告)号:US4595083A
公开(公告)日:1986-06-17
申请号:US672962
申请日:1984-11-19
申请人: Robert Mackenzie , Thomas Digweed
发明人: Robert Mackenzie , Thomas Digweed
CPC分类号: F16D65/186 , F16D65/74 , F16D2121/12 , F16D2121/14
摘要: A disk brake actuator having a hydraulic slack-adjusting arrangement for maintaining a positive clearance between a brake shoe and a brake disk, includes a cylinder housing having disposed therein a brake-applying spring section, a hydraulic-operated release section, and an actuator piston spindle arrangement operably-connected to the spring section by way of a clutch arrangement. A flange, formed on the actuator piston, acts as a plunger during a brake application and draws a first amount of hydraulic fluid into a first storage area, such first amount corresponding in volumn to the clearance between the brake disk and brake shoe when a nonworn brake shoe is first used. Upon release of the brake, the actuator piston forces the hydraulic fluid back into a second storage area wherein is included a shuttle member movable with a shuttle chamber. Additional hydraulic fluid is drawn from a reservoir when actuator piston movement, beyond the original clearance value, occurs as a result of brake shoe wear. The additional hydraulic fluid corresponds in volumn to that amount of brake shoe wear and remains in the first storage area upon brake release, thus maintaining the actuator piston at the original clearance distance relative to the brake shoe and brake disk. The additional volumn of hydraulic fluid is prevented from returning to the reservoir by a check valve. A bleed screw in the reservoir allows bypassing the check valve when new brake shoes are installed and the additional hydraulic fluid must be returned.
摘要翻译: 具有用于保持制动蹄和制动盘之间的正间隙的液压松弛调节装置的盘式制动器致动器包括:缸体,其中设置有制动器施加弹簧部分,液压操作释放部分和致动器活塞 主轴布置通过离合器装置可操作地连接到弹簧部分。 形成在致动器活塞上的凸缘在制动施加期间用作柱塞,并且将第一量的液压流体拉到第一存储区域中,这样的第一量对应于当制动盘和制动蹄之间的间隙时, 制动蹄首先被使用。 在释放制动器时,致动器活塞迫使液压流体回到第二储存区域,其中包括可与梭室一起移动的梭子件。 当致动器活塞运动超过原始间隙值时,由于制动瓦磨损而发生额外的液压油。 附加的液压流体的体积相当于制动蹄的磨损量,并且在制动器释放时保持在第一存储区域中,从而将致动器活塞保持在相对于制动蹄和制动盘的原始间隙距离。 液压流体的附加体积被防止通过止回阀返回储存器。 蓄能器中的放气螺栓允许在安装新的制动蹄时旁路止回阀,并且必须返回额外的液压油。