Results 61 to 70 of about 1,756 (224)

渐开线斜齿圆柱齿轮齿面接触强度分析

open access: yesJixie chuandong, 2014
The total contact line length isn’t a constant value during a meshing period of helical gear pair. However the length will have an affect on the linear load which acts on helical gear pair,so the variational law of contact line length during a meshing ...
李宁, 李威
doaj  

Electrical impedance observation for lubrication conditions of helical gears under actual operation

open access: yesNihon Kikai Gakkai ronbunshu
In this study, the effectiveness of the electrical impedance method (EIM) for monitoring lubrication conditions in helical gear systems during actual operation was investigated.
Hikaru OKUBO, Asuka WATANABE, Ken NAKANO
doaj   +1 more source

Stair‐Climbing Wheelchairs for Enhanced Mobility: A Comprehensive Review of Fundamental Mechanisms, Design Concepts, and Performance Analysis

open access: yesJournal of Field Robotics, EarlyView.
ABSTRACT People with physical disabilities face significant mobility challenges while climbing uneven surfaces and staircases. In these circumstances, traditional wheelchairs do not provide stable, safely controlled mobility, underscoring the importance of building superior stair‐climbing wheelchairs for both medical and infrastructure purposes.
Gopisetti Manikanta   +10 more
wiley   +1 more source

Sentipensar [Feel‐Thinking] Cultivates Collective Scientific Sensemaking and Worldbuilding Within and Beyond Ecological Despair

open access: yesScience Education, EarlyView.
ABSTRACT Educating youth about environmental and climate justice is crucial in realizing a sustainable and flourishing future. Yet this can be challenging given the intense eco‐emotions youth experience and express while learning about these consequential realities and their implications.
Kelsie Fowler
wiley   +1 more source

修形人字齿轮传动系统动态特性分析

open access: yesJixie chuandong, 2014
The double helical gear addendum modification is achieved by using parabola instead of part of straight line on rack cutter blade.Through a predesigned parabolic function of transmission errors and combined with the equation of the rack cutter blade,the ...
尚鹏, 李建华, 王三民
doaj  

Key Technical Fields and Future Outlooks of Space Manipulators: A Survey

open access: yesSmartBot, EarlyView.
This paper systematically reviews the technological development of space manipulators, emphasizing the unique challenges posed by space environments. It examines four areas: structural design, modeling, planning, and control, while introducing typical ground test platforms.
Gang Chen   +12 more
wiley   +1 more source

斜齿轮的参数化建模与动力学分析

open access: yesJixie chuandong, 2006
A method of parametric model of helical gear with the 3D parametric function in Pro/E is presented.By pro/MECHANICA and ANSYS,dynamics characteristics of helical gear are analyzed.Using the method,development cycle of helical gear can be greatly reduced.
朱学文, 朱国文, 何小新
doaj  

Resource reallocation across successive systemic innovations: How Rolls‐Royce shaped the evolution of the turbojet, turboprop, and turbofan

open access: yesStrategic Management Journal, EarlyView.
Abstract Research Summary Despite the importance of resource reallocation in shaping a variety of strategic outcomes, strategy scholars have paid only limited attention to the processes by which firms reallocate their resources across successive systemic innovations.
Gino Cattani   +2 more
wiley   +1 more source

Effect of Gear Backlash Function on the Dynamics Characteristic of Helical Gear

open access: yesJixie chuandong, 2015
A three- degree- of- freedom shaft- torsion coupling nonlinear dynamics model of a single-stage helical cylindrical gear transmission system is established,which included the nonlinear factors such as gear backlash,time- varying stiffness,transmission ...
Wang Xin, Kang Boqiang
doaj  

Analysis on the Machining Twisting mechanism of Tooth Surface with Axial Modification of Helical Gear and Its Influence on Meshing Performance

open access: yesJixie chuandong, 2020
The formation mechanism of tooth surface twist in helical gear generating machining (worm grinding and hobbing) and the measure to reduce the tooth surface twist are mainly studied.
Shihao Gao   +3 more
doaj  

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