| 摘要 |
<p>A mechanical force enhancement device (10) which both amplifies an input force to produce a larger output force while also reducing the speed of an output member during the latter part of the output stroke. The device (10) employs a sequential pivoting operation which is capable of providing the above results while being uncomplicated in its design and construction. The device (10) includes a housing (12) having a pair of spaced-apart camming plates (40). Each camming plate (40) has a pair of opposing camming contours (42,43) formed therein so as to define two sets of spaced-apart camming contours (42,43). At one end of each camming contour is a recess (44,46) so as to define two sets of spaced-apart recesses (44,46). A linkage member (20) is disposed between the camming plates (40) and includes a driven end (36) adjacent one of the sets of spaced-apart camming contours (42) and a driving end (38) adjacent the other set of spaced-apart camming contours (43). The linkage member (20) also includes a pair of camming members (28,32), each of which engages a corresponding one of the sets of spaced-apart camming contours (42,43). The camming members (28,32) are able to engage their respective recesses (44,46) only when the other camming member (28,32) is engaged with its respective camming contours (42,43). A stroking device (14) is engaged with the driven end (36) of the linkage member (20) and a rod (18) is engaged with the driving end (38) to reciprocate relative to the housing (12). A tool can be attached to the distal end (64) of the rod (18) to perform work on a workpiece. <IMAGE></p> |
