Passive Two-Way Ratchet Brake Applicable to the Roll Axis of Weight Assist Device

Chanuk Jeon, Jae Bok Song

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In industrial fields, when workers perform repetitive tasks holding heavy tools for prolonged periods of time, adopting a weight assist device (WAD) can relieve workers' muscle fatigue and increase their work efficiency and productivity. These WADs, with a multi-degree-of-freedom counterbalance mechanism, can maintain posture in the pitch axis; however, they face the limitation of not being able to maintain posture in the roll axis due to the absence of a rotation limiting device. Consequently, workers are easily exposed to dangerous situations, such as collisions and pinching. To overcome these drawbacks, this study proposes a passive brake using a ratchet structure capable of rotating in both directions, which can be applied to the roll axis of a WAD. The two-way ratchet joint brake is actuated by the contact of the ratchet ring and the stopper. Due to the normal force between the contacts, it does not rotate below a certain torque and rotates only when a certain torque is exceeded. In the free rotation state, the brake can help the device to quickly return to the stationary state. In the design stage, we set parameters, such as the contact angle, to design a brake with a reference torque to keep stationary below a certain torque. The performance of the brake was verified in terms of stationary state maintenance.

Original languageEnglish
Title of host publication23rd International Conference on Control, Automation and Systems, ICCAS 2023
PublisherIEEE Computer Society
Pages1896-1900
Number of pages5
ISBN (Electronic)9788993215274
DOIs
Publication statusPublished - 2023
Event23rd International Conference on Control, Automation and Systems, ICCAS 2023 - Yeosu, Korea, Republic of
Duration: 2023 Oct 172023 Oct 20

Publication series

NameInternational Conference on Control, Automation and Systems
ISSN (Print)1598-7833

Conference

Conference23rd International Conference on Control, Automation and Systems, ICCAS 2023
Country/TerritoryKorea, Republic of
CityYeosu
Period23/10/1723/10/20

Bibliographical note

Publisher Copyright:
© 2023 ICROS.

Keywords

  • Joint brake
  • Ratchet
  • Weight assist device

ASJC Scopus subject areas

  • Artificial Intelligence
  • Computer Science Applications
  • Control and Systems Engineering
  • Electrical and Electronic Engineering

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