Improved passive vibration reducing apparatus

Abstract

There is provided a vibration reducing apparatus (10) for a percussive tool (60) having an axis of reciprocation. The apparatus comprises, a guide frame (38,38a,38b) and at least one member (50) extending across the axis of reciprocation. An assembly (20) extending in a direction of along the axis of reciprocation comprises at least two layers (26,28,30,32) and each layer comprises four interconnected elongate members (27a,27b,29a,29b,31a,31b) pivotally attached and rotatable with respect to each other to define a polygon; and the assembly has at least one biasing means (24a,24b). A handle (40) is movably coupled to the guide frame and supported on the assembly. The apparatus provides decreasing stiffness with increasing compression of the assembly under an operator applied load to the handle for reducing vibration in a predetermined frequency range. 提供了用于具有往复运动轴线的冲击工具(60)的减振设备(10)。该设备包括引导框架(38、38a、38b)和横穿往复运动轴线延伸的至少一个构件(50)。在沿着往复运动轴线的方向上延伸的组合件(20)包括至少两个层(26、28、30、32)，并且每个层包括四个互连的细长构件(27a、27b、29a、29b、31a、31b)，四个互连的细长构件枢转地附接并且相对于彼此可旋转以限定多边形；并且该组合件具有至少一个偏置装置(24a、24b)。手柄(40)可移动地连接到引导框架并支撑在组合件上。在操作员向手柄施加负载的情况下，该设备随着组合件增加的压缩而提供减小的刚度，以用于减小在预定频率范围内的振动。