A study on the operation method of safety device of rotating quick coupler

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, 15 1 , 2021

J. Korea Society of Die & Mold Engineering, Vol.15 No.1, 2021 ISSN 2092-9692

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A study on the operation method of safety device of rotating quick coupler

Jong-Won Song

Chil-Sung Song

1

Department of Mechanical Engineering, Yuhan University Woojung Machinery Industry1

(Received January 04, 2021 / Revised January 29, 2021 / Accepted March 31, 2021)

Abstract: Excavators are construction machines used for digging soil, transporting soil, dismantling buildings and clearing

the ground at construction sites. There are various attachments attached to the arm end of the excavator and used for various operations. There are the most common types of buckets attached for excavation and other types of attachments used for foresting, road cleaning, snow removal, and waste disposal. When multiple types of work are done at the same time, several attachments must be replaced and a device called a quick coupler is used to reduce replacement time. Although a quick coupler reduces the replacement time of the Attachment, it is necessary to attach safety devices to prevent unintentional detachment of attached attachments during the operation. To prevent the attachment from leaving or falling regardless of the operator's intention, support is installed in the hook of the bucket pin and controlled through a separate hydraulic cylinder to ensure safety. When attaching an attachment, it shall be attached without any action. This study is intended to verify the design validity of safety devices to prevent falls of attachments occurring at construction sites.

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Pintle Hook Rotating system Moving Pin Fixing Cylinder Fixing Hook Center Joint

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Safety Pin Safety pin cylinder

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Moving Hook Safety Pin Fig. 8

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Safety Pin Safety Rod Spring

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Hydraulic cylinder Connector L-Bracker

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1) D.Y. Sin., S.O. Lee., W.K. Hwang., K.W. Lee., “Technological Review of Attachments for Construction Equipments”, Journal of Fluid Power and System Vol 8(2), pp. 43-48, 2011.

2) M.H. Baek., S.H. Kim., K.S. Lee., J.W. Park., J.H. Kim., “Development of Reliability Assessment Method for Quick Couplers for Construction Machinery”, The Korean Society of Mechanical Engineers, Spring and Autumn Academic Conference, pp. 142-144, 2019.

3) Y.M. Son., “That are automatically chaktal for excavators that have links to a safety pin”, Korean Intellectual Property Office registration number 10-1859513, 2018.

4) H.S. Lee., “Quick Coupler with Safety pin”, Korean Intellectual Property Office registration number 10-1825724, 2018.

5) K.Y. Jung., “Rotary Quick Coupler”, Korean Intellectual Property Office registration number

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