Study of optimal strategy and linkage-model for external non-circular helical gears shaping

Liu, Youyu

doi:10.1177/0954406214536700

Cited by 6 publications

(12 citation statements)

References 17 publications

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“…The shaping cutter should rotate a week additionally while moving downward or upward one screw lead along principal shaft. 22 The resultant angular speed ðω * b Þ of the shaping cutter is as follows…”

Section: Design Of Shaping Linkage Modelsmentioning

confidence: 99%

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Parametric design approach on high-order and multi-segment modified elliptical helical gears based on virtual gear shaping

Liu

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part C:

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In the past, family of elliptic gears with closed pitch curve includes elliptic gears, high-order elliptic gears, modified elliptic gears, and high-order and two-segment modified elliptic gears. On this basis, this article expands their connotation and unifies them into high-order and multi-segment modified elliptical helical gear (HOMSMEHG), and puts forward the expression of pitch curve. In order to obtain a physical model with real tooth flanks, this article proposed a parametric design approach on the HOMSMEHG based on virtual gear shaping, including decoupling basic parameters, parametric design based on the shaping cutter, and design of shaping linkage models, which had laid a theoretical foundation for designing the HOMSMEHG. Moreover, the realization technology of parametric design was also offered, which had solved the key problem of engineering implementation. Finally, two cases of designing internal and external gears are provided based on virtual gear shaping, which shows that the design approach of the HOMSMEHG and the virtual shaping method proposed in this article are feasible. The tooth flanks of the gears obtained has obvious cutting marks, and conforms to the real ones, which can ensure the reliability of the dynamic or kinematic analysis.

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Section: Design Of Shaping Linkage Modelsmentioning

confidence: 99%

“…of o b point in S c is shown in equation (21) transformation, the coordinates of the points on the shaping cutter are mapped from ρ b to S c , as shown in equation(22) …”

mentioning

confidence: 99%

Parametric design approach on high-order and multi-segment modified elliptical helical gears based on virtual gear shaping

Liu

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part C:

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“…12,13 The second method that we also applied is the finite element analysis. 14,15 We used Ansys Workbench at this problem. After defining the loads, boundary conditions and the proper contact constraints between the surfaces, several analyzes were carried out in order to locate the critical places.…”

Section: Enhanced Kinematicmentioning

confidence: 99%

Arbitrary vehicle steering characteristics with changing ratio rack and pinion transmission

Bendefy

Piros

Horák

2015

Advances in Mechanical Engineering

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In order to achieve arbitrary steering characteristics at vehicles, a steering mechanism was developed, in which changing ratio rack and pinion connections have been applied. In contrary to a regular steering mechanism where only a single rack is used, two racks were applied in order to make arbitrary characteristics possible. The turning wheel's required motion functions had to be defined first, thereafter could we determine the changing ratio rack and pinion geometry which produces this motion. First, a simplified two-dimensional mockup was created in order to study the difficulties and possibilities of a real construction. Later, a fully functional assembly was designed and manufactured to make further experiments possible.

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“…The use of non-circular gears in industry certifies their effective performance, while prompting new ideas for improved working conditions. Non-circular gears are also used on oval gear flowmeters [12], which are categorized as positive displacement flow technology devices. Positive displacement flow technology allows for precise flow measurements of most clean liquids, regardless of media conductivity.…”

Section: Introductionmentioning

confidence: 99%

Designing Pitch Curves of Non-Circular Gears

Medvecká-Beňová¹

2018

SJSUT.ST

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The paper examines the design and generation of gear drives with non-circular gears. Gearings with a changing transmission gear ratio are used for the purposes of practical experimentation, even though "standard" gearings with a constant transmission gear ratio are used more often. In this paper, the author presents the design for the shape of a pitch outline for a specific requirement, that is, continuous change in gear ratio during one rotation. The gearing is designed such that the pitch curve is composed of an ellipse. The article also presents some kinematic properties of the designed non-circular gearing.

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Study of optimal strategy and linkage-model for external non-circular helical gears shaping

Cited by 6 publications

References 17 publications

Parametric design approach on high-order and multi-segment modified elliptical helical gears based on virtual gear shaping

Parametric design approach on high-order and multi-segment modified elliptical helical gears based on virtual gear shaping

Arbitrary vehicle steering characteristics with changing ratio rack and pinion transmission

Designing Pitch Curves of Non-Circular Gears

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