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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.


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Patent
22 Jul 1974
TL;DR: In this article, a type of gearing that significantly increases the torque capacity of high reduction gearing is proposed. But the effect of these profile characteristics is to shift the principal tooth load away from the region where the line of action is tangent to the base circle of the smaller gear, which is the place where tooth surface stresses tend to be a maximum.
Abstract: A type of gearing that significantly increases the torque capacity of high reduction gearing. This is accomplished by utilizing on the larger of a pair of mating gears a larger pressure angle than that of the smaller gear, and also in some cases a circular arc profile that has a shorter radius than that of an involute profile. The effect of these profile characteristics is to shift the principal tooth load away from the region where the line of action is tangent to the base circle of the smaller gear. Since this is the region where the relative radius of profile curvature is at a minimum, it is the place where tooth surface stresses tend to be a maximum. Relief of the surface stresses in this region therefore allows the gear set to carry greater torque without being subject to failure by surface pitting.

16 citations

Journal ArticleDOI
TL;DR: In this paper, an approximate equation for the relation between pinion and gear addendum modification factors for gears to have a pre-establishedb value of the contact ratio is given, and a method to estimate those factors when the additional condition of balanced specific sliding is imposed, also presented.

16 citations

Patent
02 Aug 1995
TL;DR: In this paper, a master gear (100) is defined by parameters relating to a pressure angle of an imaginary outer diameter of the work gear (200) and a pressure angles of a imaginary form diameter of a work gear having spur teeth.
Abstract: A master gear (100) for measuring, in a parallel axis gear measuring apparatus (10), tooth profile, tooth pitch and tooth thickness of a work gear (200). The master gear (100) has a plurality of adjacent teeth separated by a tooth spacing that varies as a repeatable sequence of spacings, wherein the master gear (100) contacts only a single tooth of the work gear (200) during measurement of work gear tooth profile and tooth thickness. The master gear (100) contacts only two teeth of the work gear (200) during a transition between measurement of tooth profile of individual teeth of the work gear (200), wherein tooth pitch is measured during the transition. The master gear (100) also has transverse operating pressure angle dependent on a transverse pressure angle at an outer diameter of the work gear (200), a transverse pressure angle at a form diameter of the work gear (200), a transverse pressure angle at a pitch diameter of the work gear (200), a transverse tooth thickness at a pitch diameter of the work gear (200) and a pitch diameter of the work gear (200). In one embodiment, the master gear (100) has helical teeth having a tooth spacing and a gear width dependent on a contact ratio of the work gear (200). In another embodiment, the master gear (100) has spur teeth for measuring a work gear (200) having spur teeth. The master gear (100) having spur teeth is defined by parameters relating to a pressure angle of an imaginary outer diameter of the work gear (200) and a pressure angle of an imaginary form diameter of the work gear (200).

16 citations

Journal ArticleDOI
Hong-Bing Wang1, Changjiang Zhou1, Haihang Wang1, Bo Hu1, Zhongming Liu 
15 Jul 2021-Wear
TL;DR: In this article, a numerical model with high computational accuracy for rough surface contact is developed and applied to the wear prediction of spur gears, and the effects of main design parameters on gear wear are subsequently investigated.

16 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202313
202244
202127
202038
201960
201841