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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
Nagai Yoshitomo1
26 Oct 2017
TL;DR: A worm speed reducer includes a worm and a worm wheel meshed with the worm as mentioned in this paper, and the worm wheel has teeth with a modulus of elasticity of 6000 Pa or more.
Abstract: A worm speed reducer includes a worm and a worm wheel meshed with the worm. The worm wheel has teeth with a modulus of elasticity of 6000 Pa or more. The difference obtained by subtracting the pressure angle on the pitch circle of the worm wheel from the pressure angle on the pitch circle of the worm is set in the range of 0.5° to 1°.

1 citations

Patent
23 Feb 2018
TL;DR: In this paper, a gear pitting method based on probability distribution is proposed to solve the internal excitation problem of a pitting gear system, which has the advantages that the defects are overcome that a traditional pitting model is greatly deviated from the actual and complex pitting distribution is unable to handle.
Abstract: A gear pitting modeling method based on probability distribution comprises: first, establishing a tooth face probability pitting plane distribution model, with pitting randomly distributed along toothwidth and normally distributed along tooth height; second, acquiring meshing line length variation by means of image processing; third, establishing one-to-one correspondence relation between the meshing line length variation and pressure angle; fourth, comprehensively considering hertz contact stiffness, bending stiffness, shear stiffness and axial compression stiffness to precisely calculate gear time-varying mesh stiffness and solve internal excitation of a gear system. The gear pitting modeling method based on probability distribution has the advantages that the defects are overcome that,for instance, a traditional pitting model is greatly deviated from the actual and complex pitting distribution is unable to be handled; model calculation precision is improved; internal excitation ofa pitting gear system is precisely calculated; gear pitting modeling based on probability distribution is completed.

1 citations

Journal ArticleDOI
Zhong Yi Ren1
TL;DR: In this article, the impact of meshing transmission of arc gear by central distance error researched by current literature is based on arc tooth profile, this study is not suitable for the tooth profile processed by hob.
Abstract: The tooth profile of arc gear is no longer arc after hob process, it’s a section of curve which is similar to the arc. Although there have been confirmed that this curve which is similar to the arc can make sure that the transmission ratio and meshing point of two gears will not change ,pressure angle at the meshing point will certainly change, and there is also no literature report how much this curve has impact on pressure angle. The impact of meshing transmission of arc gear by central distance error researched by current literature is based on arc tooth profile, this study is not suitable for the tooth profile processed by hob, and there is no literature report how much central distance error has impact on transmission ratio, pressure angle and mesh point of arc gear which processed by hob. In this article, the author has work out this problem by use tooth surface equation.

1 citations

Journal ArticleDOI
TL;DR: In this article, the root stress of a meshed thin-rimmed helical internal gear with an asymmetric web arrangement in mesh was derived for a planetary gear unit of the automatic transmission of automobile.
Abstract: This paper presents a study on the effects of design parameters (rim thicMness, standard pressure angle, number of teeth, and face width) on root stresses of a meshed thin-rimmed helical internal gear with an asymmetric web arrangement for a planetary gear unit of the automatic transmission of automobile. The tooth deflections of the thin-rimmed helical internal gear with an asymmetric web arrangement of various design parameters due to a concentrated load were calculated by the three-dimensional finite-element method (3D-FEM). On the basis of the calculated results, approximate equations for the influence function of the tooth deflection were derived. The load sharing factor and the load distribution on the contact line of the thin-rimmed helical internal gears in mesh were calculated using these approximate equations and Kubo and Umezawa's method. The root stress of the thin-rimmed helical internal gear under the distributed load was calculated using the 3D-FEM. and the effect of the design parameters on the root stress was determined. Furthermore, a practical formula for the maximum root stress of the thin-rimmed helical internal gear with asymmetric web arrangement in mesh was derived.

1 citations

Patent
Kikuchi Arata1
22 Dec 2016
TL;DR: In this article, the worm gear speed reducer is used to reduce torque fluctuation while allowing assembly error or machining error, and a steering device including the worm wheel is provided.
Abstract: PROBLEM TO BE SOLVED: To provide a worm gear speed reducer capable of reducing torque fluctuation while allowing an assembly error or machining error, and a steering device including the worm gear speed reducer.SOLUTION: In a worm gear speed reducer 19, the relation between an outer diameter D1 of a worm 20 and an outer diameter D2 of a hob for cutting a worm wheel 21 and forming a tooth groove 42 satisfies the following formula (1): 3≥D2/D1≥1.7; and the relation between a pressure angle α of the worm wheel 21 and a pressure angle β of the worm 20 on an engagement pitch circle P of the worm 20 and worm wheel 21 satisfies the following formula (2): 0.1 degrees≤α-β≤0.5 degrees.SELECTED DRAWING: Figure 4

1 citations


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