Pressure angle

About: Pressure angle is a research topic. Over the lifetime, 1373 publications have been published within this topic receiving 10245 citations. The topic is also known as: angle of obliquity.

Tertiary negative-deflection flexing contact gears of non-profile-shifted tooth profile.

Abstract: In cup-shaped flexing contact gears (1), both a rigid internal gear (2) and a flexible external gear (3) are made to be non-profile-shifted spur gears, an opening (3a) of the flexible external gear (3) is set in a state of negative deflection lower in value than a normal deflection, a moving locus is obtained through rack approximation of teeth of the external gear to the internal gear at respective sections of rotating of tooth trace of the flexible external gear (3), another moving locus in a section of rotation at an end portion of tooth trace on the side of a diaphragm or in the vicinity of the outside of the end portion is smoothly connected to an envelope e &cir& - of the first moving locus, which is obtained by overlapping this moving locus on one of the sections of rotation, so that a composite curve L is obtained. A curve FE is obtained by subjecting to the conversion of similitude of 1/2 in the reduction ratio a portion from a starting point A of the envelope e &cir& - to a terminating point E corresponding to two times the working depth in the direction of the depth from an apex of the moving locus lo when the deflection is 0, using the terminating point as an original point, this curve FE is made to be each of main portions of convex tooth profiles at the tooth faces of the both gears 2 and 3, and, a composite curve MFE includes a straight line MF having a limited pressure angle alpha M associated with a deflection value of an opening inserted in the vicinity of a datum point M of tooth profile and a transient curve smoothly connecting the above-mentioned straight line to the main portion of the convex tooth profile, and this composite curve MFE is made to be each of tooth profiles at the tooth faces of the both gears.

Analytical solutions and computational nomograms for maximum pressure angle for cam mechanisms for full and half cycloidal and harmonic motion curves

Abstract: High pressure angles in cams with roller followers still pose as a problem in cam projects. The main objective of this work is to deduce the maximum pressure angle equations for full and half cyclo...

Forging gear, method of manufacturing the same, and mould for forging gear

Abstract: PROBLEM TO BE SOLVED: To inexpensively provide a gear which eliminates warping in configuration of the gear induced from influence in manufacturing error and distortion of heat treatment and restrains the gear from occurring noise. SOLUTION: The forging gear 1 is configured to form at least one of tooth thickness and pressure angle of basic tooth profile 2 by aligning tooth varying within gear required precision along with the basic tooth profile. The tooth thickness and the pressure angle of thinner tooth profile 3 and those of thicker tooth profile 4 relative to the basic tooth profile 2 are determined so as to become optimal increased and decreased amount at every tooth within the gear required precision. In addition, error of gear shape inducing to gear noise and assembled error of the gear are adjusted at every tooth and engagement due to every tooth is made to optimal condition. Alteration in the gear shape at every tooth of the forging gear 1 can perform by adjusting surface shape of product in forging mould concerned to manufacture of the forging gear. Once determining the shape of the mount, it is possible to inexpensively provide a majority of the gears which restrain the gear from occurring the noise. COPYRIGHT: (C)2004,JPO

Speed reducer with displaced rollers

Abstract: The utility model relates to a speed reducer with displaced rollers, which is mainly composed of an inner gear ring, a rolling column tray and an input shaft with an eccentric bearing. The tooth profile of the inner gear ring is composed of circular arcs and tangent lines, and is basically fit with a theoretical curve. Dedendums and addendums are all in void contact with rolling columns, without the defect of an oversize pressure angle. The rolling column tray is provided with uniformly distributed radial slots; 1-3 rolling columns are arranged in each slot. The rolling columns are in rolling meshing engagement with an inner gear, under the push of the eccentric bearing; the speed is reduced by one tooth difference. The utility model has the advantages of small volume, easy fabrication, high efficiency, low noise and long service life. Single stage transmission ratio can reach about 90; supergiant type or supersmall type machines can all be manufactured.