Webbed bevel gear

Details Webbed bevel gear Webbed bevel gear

1994-07-19

1996-06-25

Lorence, Richard M.

Machine element or mechanism

Gearing

Teeth

F16H 5517

Patent

active

055289525

ABSTRACT:
A webbed bevel gear in which webs are formed of a minimal size so that the gear can be downsized, while also improving the mechanical strength of the gear. The webbed bevel gear is made so as to be capable of avoiding losses from the webs and so that the strength of the dedendum can be maintained by the webs, while the strength and the wear resistance of the dedendum and the tooth surface is further improved. The webbed bevel gears (2, 2a-2c) are constructed as follows: each of the webs is formed with a concave curved surface defined by the base cone so that it can connect the two adjacent teeth at the dedendum between the teeth at the radial end of the gear, the value obtained by dividing the height (h) of the webs in relation to the module (m) of the gear meets the equation 0.2.ltoreq.h/m.ltoreq.0.6, and the value obtained by dividing the width (w) of the webs along the generating line of the base cone by the width (W) of the gear along the generating line of the base pitch cone meets the equation 0.04.ltoreq.w/W.ltoreq.0.20. A surface treatment, such as carburizing and/or nitriding is performed in a state in which the webs are coated with a surface treatment inhibitor, or alternatively, the tooth surface and the dedendum, except for the webs, are coated with a hard layer formed of a super hard material.

REFERENCES:
patent: 3605518 (1969-11-01), Haller
patent: 4308760 (1982-01-01), Voigtlander et al.
patent: 5058449 (1991-10-01), Lindsey
Marks Std. Hnbk for Mech. Engr. 8th Ed.COPYRGT. 1978 pp. 8-107.

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