Topic
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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01 Jan 2008
TL;DR: In this article, the authors deal with finish roll forming by forced displacement, which can be conceived as a method of eliminating errors in conventional form rolling under constant loads, and they show that this method produces a high-precision tooth profile by low speed form rolling when a high rigid screw or cam is used at the pressurized section.
Abstract: This study deals with finish roll forming by forced displacement can be conceived as a method of eliminating errors in conventional form rolling under constant loads. This method produces a high-precision tooth profile by low-speed form rolling when a high rigid screw or cam is used at the pressurized section. Tooth profile is decided in the beginning of roll forming and mainly increases if the number of roll forming process is increased. Gear class is improved by one or two class after roll forming if the gear has convex type error and pressure angle error in KS 4 class. If the gear have concave type error and pressure angle error and pressure angle error, gear class is not improved in theory, but improved a little in practice. In the finishing roll forming, it inevitably yields both the concaving of tooth profile and plastic deflection of addendum of teeth. Experiments show that the concaving and the plastic deflection are successfully reduced, the accuracy of tooth profile reaches to KS 0 class.
Patent•
23 Apr 2009
TL;DR: In this paper, a speed reducer is provided with a trochoid gear 19 eccentrically rotated by an input eccentric shaft 23 and formed with external teeth 20 on an outer circumference.
Abstract: PROBLEM TO BE SOLVED: To provide a speed reducer not needing running-in or the like, and capable of positively securing a self-lock nature. SOLUTION: The speed reducer is provided with a trochoid gear 19 eccentrically rotated by an input eccentric shaft 23 and formed with external teeth 20 on an outer circumference, pins 12 inscribed and meshed by the external teeth 20 of the trochoid gear 19, output pins 18 engaged with the trochoid gear 19, and an output shaft 17 connected to the output pins 18. A pressure angle with respect to the pins 12 of the external teeth 20 of the trochoid gear 19 is 45 degrees or more. COPYRIGHT: (C)2009,JPO&INPIT
Patent•
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17 Apr 1986
TL;DR: In this article, an electric pivotal gear device A comprises a speed change internal gear G1 fixed to an input shaft 1 with eccentricity and an external gear G2 having an axis different from the gear.
Abstract: PURPOSE:To lessen abrasion by specifying a pressure angle of an internal gear with an external gear. CONSTITUTION:An electric pivotal gear device A comprises a speed change internal gear G1 fixed to an input shaft 1 with eccentricity and a speed change external gear G2 having an axis different from the gear. Both of these gears G1, G2 are formed by involute tooth, and a pressure angle is set at 30-45 deg.. The heights (h) of addenda of both gears are set as follows: m/2>h>0 (m: module), and the pressure angle is set in such a manner as to satisfy the following expression: theta2=[(360 deg./Z)X1/z]+theta1, wherein theta1 is a pressure angle of the external gear G2, and theta2 is a pressure angle of the internal gear G1.
TL;DR: In this paper , the effect of the addendum coefficient, pressure angle, and other gear parameters on the bending strength of the tooth root was studied by using ANSYS finite element simulation.
Abstract: This article studies the calculation method for the tooth root bending stress of a high-tooth gear pair with a high contact ratio. The boundary point of the double-tooth meshing zone of the high-tooth gear pair is used as the loading point for the load, and the calculation formula for the bending stress at the dangerous section of the tooth root is obtained. By using ANSYS finite element simulation, the effect of the addendum coefficient, pressure angle, and other gear parameters on the bending stress of the tooth root is studied. The analysis shows that increasing the pressure angle will reduce the bending strength of the tooth root. Increasing the coefficient of a tooth’s top height will lead to an increase in the bending strength of the tooth root. Comparing the finite element analysis (FEA) results with the theoretical calculation results, the analysis shows that under low loads, the maximum error of the theoretical calculation values of the driving toothed gear and driven gear shall not exceed 13.53% and 15.42%, respectively. Under high loads, the maximum theoretical errors of the driving toothed gear and driven gear shall not exceed 8.78% and 10.91%, respectively. This verifies the correctness of the calculation method, which is of great significance for improving the load-bearing capacity of high-tooth gears and for guiding tooth shape design.
TL;DR: In this article , asymmetric and asymmetric tooth profiles were compared using the finite element analysis tool Ansys and the designs made with different materials will go through structural examination (mild steel and EN 32 steel).
Abstract: The idea of using asymmetric tooth forms has gained momentum in gearing design. Similar to symmetric basic rack gears, tooth action parameters are established in the first stage. The second stage involves calculating the unified generating basic rack for a set of mated gears. In some cases, it is possible to determine the features of specific fundamental rack tooth profiles for each gear in a transmission. Gearings with asymmetrical profiles have the advantage of having a higher-pressure angle than operational profiles (as a result of a lower pressure angle than non-operating profiles) and the possibility for a considerable improvement in the face contact ratio. In this study, symmetric and asymmetric tooth profiles will be compared using the finite element analysis tool Ansys. Asymmetric (different pressure angle) and symmetric (different pressure angle) tooth profiles will be designed and built in the 3D modelling software CATIA. The designs made with different materials will go through structural examination (mild steel and EN 32 steel).