Helical tooth broach
AssigneesNachi-Fujikoshi Corp., Aisin Aw Co., Ltd.
InventorsKazuyuki Nakamura, Yasushi Nogawa, Hidetaka Nakae, Katsuhiko Nishimura
Life of this patent
Estimating the term…
Abstract
A helical gear tooth broach having an elongate body having a series of axially aligned and spaced teeth disposed thereon. The direction of tooth spaces or traces of the teeth in a longitudinally extending helical alignment and the direction of the gullets of the teeth in a side by side circumferentially extending helical arrangement are both oriented at a right-upward or a left-upward helix angle in common with each other.
Claims8
A gear tooth broach for broaching internal helical gears or splines comprising an elongate body having a series of axially aligned and spaced teeth disposed thereon, tooth spaces or traces of the teeth longitudinally extending in a helical alignment along an axis of the body and gullets of the teeth circumferentially extending in a parallel helical arrangement,
- wherein a first direction of the tooth spaces or traces of the teeth longitudinally extending in the helical alignment and a second direction of the gullets of the teeth circumferentially extending in the parallel helical arrangement are both oriented at right-upward or left-upward helix angles in common with each other.
A gear tooth broach for broaching internal helical gears or splines, comprising:
- an elongated cylindrical body having a surface and a longitudinal axis;
- a plurality of spaced parallel rows of teeth extending helically along the surface of said cylindrical body at a helix angle β with respect to said longitudinal axis;
- and
- a plurality of parallel gullets extending helically along the surface of said cylindrical body at a helix angle (90°−α) with respect to said longitudinal axis, each of said gullets being interposed between a row of said helical teeth, where a is the helix angle of said gullets with respect to a plane extending in a circumferential direction perpendicular to said longitudinal axis, said rows of teeth having slopes and said gullets having slopes, wherein the slopes of said rows of teeth and the slopes of said gullets have an identical sign, either positive or negative.
Dependencies are inferred from the claim text.