Crimping tool for wire end ferrules

摘要

A scissors-type crimping tool for crimping a female contact onto an electrical conductor, comprising a planar base member having body and first lever portions; an annular crimping die member connected for rotation between die-open and die-crimping positions relative to the base member body portion; a toggle link arrangement connecting a second lever for pivotal movement relative to the base member body portion; and a cascade spring arrangement operable by the toggle arrangement from a non-stressed condition to a stressed caged condition during initial movement of the second lever in the closed direction, and to a stressed condition during further movement of the second lever, thereby to afford processing of different cross-sections of ferrules and conductors in the crimping die, and to apply the force of the stressed cascade spring arrangement to the crimping die member during the final stage of the crimping operation.

主权项

1. A scissors-type crimping tool for crimping a female electrical contact onto the bare end of an electrical conductor, comprising:
(a) a frame including at least one general planar base member (6) having a body portion containing an opening, and a first portion extending from said body portion to define a first lever (6a) having a free end; (b) crimping die means for crimping a female metal ferrule (2) onto the bare end of a conductor (3), said crimping die means including an annular crimping die member (4) rotatably connected with said base member body portion in collinear alignment with said base member opening, said crimping die member being rotatable between angularly displaced open and crimping positions relative to said base member; (c) operating means for angularly displacing said crimping die member between said open and said crimping position, said operating means including:
(1) a second lever (19) having first and second ends;(2) a toggle link arrangement (14) connecting said second lever first end with said base member body portion to afford generally pivotal displacement of said second lever between open and closed crimping positions relative to said first lever;(3) a first lever pivot pin (17) connecting said second lever with said die member such that said die member is angularly displaced between said open and closed crimping positions as said second lever is pivoted between said open and closed crimping positions, respectively, said toggle link arrangement having a first condition during the initial pivotal movement of said second lever from said open position toward an intermediate position between said open and closed crimping positions, and an over-center second condition during the subsequent travel of said second lever from said intermediate position toward said closed crimping position; and (d) cascade spring means (29) operable by said toggle arrangement from a non-stressed condition to a stressed caged condition when said second lever is pivoted from said open position toward said intermediate position, and to a released condition when said second lever is pivoted from said intermediate position toward said closed crimping position, thereby to provide a force path compensating means for processing different cross-sections of wire end ferrules and conductors in the crimping die, and for applying the force of the released energy of the stressed cascade spring means to said crimping die member during the final stage of the crimping operation.