초록 ▼

A workholding apparatus has an improved positioning assembly centering top jaw members grippingly supporting a workpiece. The workholding apparatus includes a base member defining a horizontally elongate guide channel which opens upwardly through a top surface to form a guide passage. At least first

A workholding apparatus has an improved positioning assembly centering top jaw members grippingly supporting a workpiece. The workholding apparatus includes a base member defining a horizontally elongate guide channel which opens upwardly through a top surface to form a guide passage. At least first and second jaw assemblies are disposed in longitudinally spaced relation along the respective guide passage, the first and second jaw assemblies each including a bottom jaw element which is slidably positioned for longitudinal displacement within the guide passage, and a top jaw member releasably mounted on the bottom jaw element. The workholding apparatus includes an actuator assembly for effecting movement of the movable jaw members longitudinally along a path formed by the guide passage. The bottom jaw elements each include a push plate element mounted in the guide passage on the inner side thereof. The positioning assembly includes a rotating member mounted to the base member and first and second pin elements in slots in the respective push plate elements connecting the plate elements to the rotating member. The rotating member controls the relative positions of the first and second push plate elements such that the movable jaw members close on a workpiece at a precise self-centering location.

대표청구항 ▼

[ The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows:] [1.] A workholding apparatus for grippingly supporting a workpiece to enable machining operations to be carried out thereon, comprising:a base member defining a horizontally elongate gu

[ The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows:] [1.] A workholding apparatus for grippingly supporting a workpiece to enable machining operations to be carried out thereon, comprising:a base member defining a horizontally elongate guide channel which opens upwardly through a top surface; the guide channel forming a guide passage;at least first and second jaw assemblies disposed in longitudinally spaced relation along the respective guide passage, said first and second jaw assemblies each including a bottom jaw element which is slidably positioned for longitudinal displacement within the guide passage, and a top jaw member extending transversely across the guide passage and being slidably mounted on said base member, said top jaw member being releasably mounted on said bottom jaw element;an actuator assembly for effecting movement of said movable jaw assemblies longitudinally along a path formed by the guide passage;said bottom jaw elements each including a push plate element mounted in the guide passage on the inner side thereof; anda rotating member mounted to said base member below said push plate elements, said rotating member including a means for controlling the relative positions of said first and second push plate elements such that said movable jaw members close on a workpiece in a self-centering location.