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1. 发明授权

US4791841A Chucking device 失效
标题翻译：夹头装置
公开(公告)号：US4791841A
公开(公告)日：1988-12-20
申请号：US897090
申请日：1986-08-18
申请人： Francois C. Pruvot , Laurent R. Coste , Alain G. Rebetez
发明人： Francois C. Pruvot , Laurent R. Coste , Alain G. Rebetez
IPC分类号： B23B31/30 , B23B31/20 , B23B19/02
CPC分类号： B23B31/205 , Y10T279/1258 , Y10T279/1266 , Y10T82/2562 , Y10T82/26
摘要： A primary piston (19) slides axially on a spindle body (5). Together with two cylindrical bearing surfaces of different diameters (D1 and D2) of the spindle body, the primary piston bounds a primary hydraulic chamber 22) which communicates via a conduit (25) with a secondary hydraulic chamber (24). The active face (33) of a secondary piston (20) bounds the secondary hydraulic chamber (24), so that the secondary piston (20) is displaced in response to a displacement of the primary piston (19) which is reduced in the same ratio as the cross-sections of the two chambers. The secondary piston (20) acts upon a chucking sleeve (15) which actuates the chuck (12) against the bias of a spring member (17) which, in the absence of pressure, holds the chuck (12) grippingly on a workpiece. The primary piston (19) is controlled by compressed air fed through a fixed spindle support (1) via a conduit (27) into a pneumatic chamber (21) bounded by a fixed bore (8) and by two disk-shaped elements (7 and 19) rotating with the spindle.
摘要翻译：主活塞（19）在心轴主体（5）上轴向滑动。与主轴主体的不同直径（D1和D2）的两个圆柱形支承表面一起，主活塞限定了通过导管（25）与次级液压室（24）连通的主液压室22。次级活塞（20）的主动面（33）限制了二级液压室（24），使得次级活塞（20）响应于主活塞（19）的位移而被移位，主活塞作为两个腔室的横截面。次级活塞（20）作用在夹紧套筒（15）上，该夹紧套筒（15）克服弹簧构件（17）的偏压而致动卡盘（12），弹簧构件（17）在没有压力的情况下将卡盘（12）夹紧在工件上。主活塞（19）由通过固定心轴支撑件（1）经由导管（27）供给到由固定孔（8）和两个盘形元件（7）限定的气动室（21）中的压缩空气控制和19）与主轴一起旋转。

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