Keyway broach guide assembly
OwnerGlenn R. Thoroughmaninventor
Life of this patent
Estimating the term…
Abstract
A broaching bushing for guiding a broaching tool in a workpiece bore during the cutting of a keyway of in an annular surface of the bore. The bushing having two main components: a wedge-shaped member and a broaching tool guide member positionable in longitudinally abutting relation to one another to form a broaching bushing of substantially rectangular cross section for insertion in the workpiece bore. The width of the rectangular cross-section is adjusted to tightly fit the bore by the longitudinal shifting of the wedge and guide members relative to one another. The bushing is sizable to fit into a plurality of standard bores or non-standard undersize or oversize bores.
Claims10
A broaching bushing means for guiding a broaching tool in a workpiece bore during the cutting of a keyway in an annular surface of the bore, consisting of:
- an elongated wedge member and a broaching tool elongated guide member positionable in longitudinally abutting relation to one another to form a bushing means of substantially rectangular cross section for insertion in a workpiece bore,
- the wedge member and the guide member each having a first side and a second side opposite the first side,
- the first sides of each member having complementarily inclined surfaces which, when in abutting relationship, position the second side in parallel relationship to each other,
- the wedge member and the guide member being longitudinally movable relative to one another to adjust the distance between the parallel sides of the bushing means,
- wherein the rectangular cross section of the bushing means is adjustable to fit various sized bores.
A keyway broach guide assembly for guiding a keyway broach during the cutting of a keyway in an annular surface of a circular bore in a workpiece, comprising:
- an elongate guide member and an elongate wedge member,
- the guide member having a first side and a second side opposite the first side,
- an outwardly facing broach guide slot extending the length of the first side of the guide member for slidably guiding a keyway broach against an annular surface of the circular bore during the cutting of a keyway,
- the second side of the guide member being at an angle to the first side of the guide member for the length of the guide member,
- the wedge member having a first side and a second side with the first side being tapered at an angle complementary to the angle of the second side of the guide member,
- the wedge member and the guide member when fitted together with their angled sides in abutting complementary relationship providing a keyway broach guide having a substantially rectangular cross section,
- the wedge member and guide member being longitudinally adjustable relative to one another for incrementally sizing the cross-sectional width of the broach guide assembly after insertion into the circular bore to provide a keyway broach guide assembly having a cross-sectional width that will tightly fit into the circular bore in which the keyway is to be cut.
Dependencies are inferred from the claim text.