Safe robot joint brake based on an elastic latch module

Won Bum Lee, Hui Chang Park, Kuk Hyun Ahn, Jae Bok Song

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


Collaborative robots that share work spaces with human workers should be equipped with joint brakes to safely stop the movement in an emergency situation. Currently, the joint brakes that are used in the field have disadvantages of high cost, heavy weight, or inability to handle stop category 0, which is necessary in extreme situations such as power outage. In order to overcome these problems, we developed a joint brake constructed with a solenoid and an elastic latch module using coil springs. The brake is lightweight and low-cost, but it exhibits good braking performance and durability in the emergency involving stop category 0. In this study, we explain the principle and structure of the developed joint brake, select components based on dynamics simulation, and verify braking performance and durability by repetitive emergency stop experiments on applying stop category 0.

Original languageEnglish
Pages (from-to)67-72
Number of pages6
Publication statusPublished - 2018 Dec

Bibliographical note

Funding Information:
This study was supported by the MOTIE under the Industrial Foundation Technology Development Program supervised by the KEIT (no. 10063413 ).

Publisher Copyright:
© 2018 Elsevier Ltd


  • Dynamic simulation
  • Joint brake
  • Robot arm
  • Stop category

ASJC Scopus subject areas

  • Mechanical Engineering
  • Electrical and Electronic Engineering
  • Control and Systems Engineering
  • Computer Science Applications


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