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Meshing theory and contact analysis of double enveloping hourglass worm drive with planar generatrix [PDF]

Scientific Reports
The meshing and limit equations of worm drive usually have strong nonlinearities such as multiple solutions, solution nonexistence and equation singularity.
Quancheng Peng, Minghao Li
doaj   +3 more sources

Geometry Formation and Software Realization of Straight Profile Hourglass Worm

Jixie chuandong, 2022
Considering the status quo of processing，to avoid conventional spatial meshing theory，and relying on actual production projects，the forming principle of straight profile hourglass worm is analyzed in terms of geometry.
Shoubang Zheng, Shuncheng Yang, Lixuan Zhou, Yongqin Qiao, Weiping Fu   +4 more
doaj   +3 more sources

Double enveloping worm gear modelling using CAD environment [PDF]

Bulletin of the Polish Academy of Sciences: Technical Sciences, 2021
This study describes the methodology for modelling a worm and worm wheel of a double enveloping worm gear with the use of a CAD system. An algorithm for generating a globoid helix is described. In addition, the methodology for modelling an hourglass worm
Piotr Połowniak, Mariusz Sobolak, Adam Marciniec   +2 more
doaj   +3 more sources

A novel backlash-adjustable and wear-compensable hourglass worm drive: computerized design, simulation of meshing and stress analysis

Journal of Advanced Mechanical Design, Systems and Manufacturing, 2016
To satisfy the requirements of high accuracy and high-loading capacity, a novel precision-power hourglass worm drive characterizes with backlash-adjustable and wear-compensable is demonstrated.
Yonghong Chen, Wenjun Luo
exaly   +3 more sources

Mathematical model of the worm wheel tooth flank of a double-enveloping worm gear

Alexandria Engineering Journal, 2021
This paper presents a novel method for determining the worm wheel tooth flank surface. The worm wheel model is developed according to the theory of gearing and the gear generation mechanism. Two cases are considered simultaneously.
Piotr Polowniak, Mariusz Sobolak, Adam Marciniec   +2 more
doaj   +2 more sources

A processing method for rough cutting hourglass worm on general NC lathe

Journal of Advanced Mechanical Design, Systems and Manufacturing, 2019
The manufacturing method of two spatial-orthogonal rotary axis linkage is usually used to cut hourglass worm. However, the traditional processing method of roughing tooth groove depends on the special machine, specific tool, and its processing efficiency
Yanqin Zhang, Xinyang Qiu, Qiwu Zhou
exaly   +3 more sources

An overview of the postcranial osteology of caecilians (Gymnophiona, Lissamphibia). [PDF]

Anat Rec (Hoboken)
Abstract Caecilians comprise a relatively small (~220 species) group (Gymnophiona) of snake‐like or worm‐like, mostly tropical amphibians. Most adult caecilians are fossorial, although some species may live in aquatic or semi‐aquatic environments, either as larvae or adults.
Santos RO, Wilkinson M, Zaher H.
europepmc   +2 more sources

A comparative investigation of meshing characteristics of anti-backlash single-and double-roller enveloping hourglass worm gears

Journal of Advanced Mechanical Design, Systems and Manufacturing, 2019
The new precision transmission system-Anti-backlash roller enveloping hourglass worm gears are now widely employed in many industrial sectors such as robot joint design, packaging production line, and CNC (computer numerical control) machine tools ...
Shisong Wang
exaly   +3 more sources

Meshing Performance Analysis of the Cosine Roller Enveloping Hourglass Worm Drive

Jixie chuandong
On the basis of the structure of the tapered roller enveloping hourglass worm drive, the cosine roller is obtained by changing the bus shape of the tapered roller.
Xing Xincheng, Wen Yujie, Liu Zaixin, Sun Pengze   +3 more
doaj   +1 more source

Study on the toroidal helix and manufacturing method of enveloping hourglass worm tooth surface

Advances in Mechanical Engineering, 2023
As a complex space enveloped surface, the tooth surface of dual-lead helical gear enveloping hourglass worm is characteristic with difference tooth profile, unequal pitch and variable tooth thickness.
Yan Chen, Xinhua Wang, Huili Ma
doaj   +1 more source