Vehicle Coupler Automatic Decoupling Mechanism
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Solution Overview
Problem
Existing automatic uncoupling devices for couplers face issues such as lateral force damage during pneumatic uncoupling, slow response speed, and difficulty in quick rotation and locking during coupling, due to the limitations of pneumatic systems and high self-locking forces in electric systems.
Innovation Solution
The introduction of a split-type connection between the first rotating member and the coupler knuckle spindle, combined with an electric uncoupling approach, allows for independent operation during coupling and uncoupling, reducing lateral forces and improving response speed and stability, while using an electric cylinder to enhance the uncoupling mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If pneumatic uncoupling is used to push the coupler knuckle to rotate, then uncoupling can be achieved, but the coupler knuckle applies large lateral force to the cylinder piston rod and causes damage to the paint on the coupler knuckle
Solution Approach 1:
A guide rod is introduced as an intermediary component between the cylinder piston rod and the coupler knuckle. The guide rod receives the pushing force from the piston rod and transmits it to the coupler knuckle through a hinged connection, allowing the knuckle to rotate while the guide rod constrains lateral movement. This mediator absorbs and redirects forces, preventing direct lateral contact between the piston rod and knuckle that would damage the paint surface.
Solution Approach 2:
The uncoupling mechanism is segmented into distinct functional components: the cylinder piston rod for force generation, the guide rod for force transmission and lateral constraint, and the coupler knuckle for rotation. By separating the force application function from the rotation function, the system allows the piston rod to push axially along the guide rod while the knuckle rotates independently, eliminating lateral force damage.
2Productivity
If the coupler knuckle is pushed to rotate by thrust forces from two trains during coupling, then coupling can be achieved, but the resistance from the cylinder rod makes it difficult for the coupler knuckles to quickly rotate and lock
Solution Approach 1:
The guide rod connection to the coupler knuckle is made hinged rather than fixed, creating a dynamic system. During coupling, when the knuckle needs to rotate quickly to lock, the hinged connection allows the knuckle to rotate freely without being constrained by the cylinder rod, as the guide rod can pivot to accommodate the rotation. This dynamic connection eliminates the resistance that would otherwise hinder quick rotation and locking.
Solution Approach 2:
The hinged guide rod connection is designed to automatically disengage or pivot away during the coupling rotation, preventing the cylinder rod from creating resistance. The connection allows lateral movement during coupling operations, so when thrust forces push the knuckles to rotate, the guide rod follows the motion rather than resisting it, enabling quick rotation and locking.
3Reliability
If the surface of the coupler knuckle coming into contact with the uncoupling piston rod is made longer, then the stress direction can be better aligned, but the device complexity increases
Solution Approach 1:
Instead of modifying the coupler knuckle surface to extend the contact area, a guide rod is introduced as an intermediary. The guide rod provides a dedicated, optimized contact surface with the piston rod, ensuring proper stress direction alignment through its cylindrical geometry and hinged connection. This keeps the coupler knuckle design simple while achieving reliable force transmission through the mediator.
Data Source
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AI summary
An automatic uncoupling mechanism for couplers comprises a coupler knuckle spindle and a driving unit comprising a cylinder body hinged to a coupler body and a telescopic member; and further comprises a first rotating member, a boss and a boss stopper, wherein the first rotating member comprises a crank hinged to the telescopic member and a rotating part being sheathed on the coupler knuckle spindle. The driving unit unidirectionally drives the telescopic member so that the rotating part drives the coupler knuckle spindle to unidirectionally rotate by the contact of the boss with the boss stopper, realizing coupler uncoupling; and, after the driving unit drives the telescopic member to return to its position, the rotation of the coupler knuckle spindle for achieving coupler coupling is not limited by the rotating part. The present application may reduce the lateral force of the coupler knuckle to the driving unit during the uncoupling process of the coupler, and may cause the spring to drive the coupler knuckle to rotate rapidly and lock the coupler during the coupler coupling process.