Coupler
The coupler uses a hydraulic cylinder with check valves and dual compression coil springs to maintain the locked position, addressing instability and complexity issues, ensuring reliable and cost-effective attachment to work machines.
WO2026140180A1PCT designated stage Publication Date: 2026-07-02KONAN ELECTRIC
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- KONAN ELECTRIC
- Filing Date
- 2024-12-26
- Publication Date
- 2026-07-02
AI Technical Summary
Technical Problem
Existing couplers for attaching and detaching attachments to work machines, such as hydraulic excavators, face issues with instability in the locked state due to hydraulic malfunctions and complex configurations that increase costs.
Method used
A coupler design utilizing a hydraulic cylinder with check valves and dual compression coil springs to maintain the locked position, ensuring stability even in hydraulic failures, and simplifying the structure to reduce costs.
Benefits of technology
The design ensures high reliability and stability in maintaining the attachment state, simplifies the structure, and reduces costs compared to previous technologies, while allowing for easier spring attachment and detachment, enhancing safety.
✦ Generated by Eureka AI based on patent content.
Smart Images
Figure JP2024046228_02072026_PF_FP_ABST
Abstract
[Problem] To provide a coupler in which simplification of the structure and cost reduction can be achieved while enhancing, as much as possible, the holding stability in a state in which the coupler is mounted to an attachment pin. [Solution] A coupler 1 includes a body 2, a fixed arm 3, a movable arm 4, first and second hooks 5, 6, a hydraulic cylinder 7, first and second springs 8, 9, and the like. The hydraulic cylinder 7 separates a first support shaft 51 of the first hook 5 and a second support shaft 61 of the second hook 6 or makes the first support shaft 51 and the second support shaft 61 approach, and includes a check valve 16 for holding the hydraulic oil pressure in the hydraulic cylinder 7 when hydraulic oil supply to the hydraulic cylinder 7 is stopped in an extended state of the hydraulic cylinder 7. In a state that the first and second hooks 5, 6 are in an unlock posture or a lock posture, the first and second springs 8, 9 generate elastic force for biasing so as to hold the unlock posture or the lock posture even if the hydraulic oil pressure in the hydraulic cylinder 7 is released.
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