Train Coupler Uncoupling Control Mechanism
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Solution Overview
Problem
The prior coupler uncoupling control mechanism often results in incomplete uncoupling of electrical couplers due to premature completion of the mechanical coupler uncoupling process, leading to seizure and uneven contact forces, which can prevent successful uncoupling of electrical couplers.
Innovation Solution
A coupler uncoupling control mechanism featuring a second valve body that controls airflow to suspend the uncoupling motion of the propelling cylinder, a third valve body for delayed airflow cut-off, and a time-delay unit to ensure complete separation of electrical couplers before resuming mechanical coupler uncoupling, utilizing a pneumatic control system with specific valve configurations to manage airflow paths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the uncoupling cylinder is connected directly to the uncoupling pipe without a control assembly, then the uncoupling response speed is fast, but the electrical couplers cannot be completely uncoupled due to premature mechanical coupler separation causing seizure
Solution Approach 1:
The control assembly suspends the uncoupling motion of the uncoupling cylinder during the uncoupling process of the electrical coupler, ensuring that the mechanical coupler remains coupled until the electrical coupler is fully separated. This preliminary control action prevents seizure and ensures complete uncoupling.
Solution Approach 2:
The control assembly acts as an intermediary between the uncoupling pipe and the uncoupling cylinder, controlling the airflow timing to coordinate the uncoupling sequence. It mediates the conflict between fast response and complete uncoupling by introducing controlled delays in the mechanical coupler separation.
2Device complexity
If the mechanical coupler uncoupling process completes before the electrical coupler uncoupling, then the uncoupling sequence is simple, but the positioning pins and sleeves form an angle under gravity causing large local contact forces and seizure
Solution Approach 1:
The control assembly performs a preliminary action by suspending the mechanical coupler uncoupling during the electrical coupler separation process. This ensures that the positioning pins and sleeves remain aligned and horizontal, preventing large local contact forces and seizure.
Solution Approach 2:
The control assembly applies preliminary anti-action by counteracting the gravitational effect that would cause the positioning pins and sleeves to form an angle. By maintaining the mechanical coupler in a coupled state during electrical coupler uncoupling, it prevents the harmful angular misalignment before it can occur.
3Reliability
If a control assembly is added to suspend uncoupling motion, then the uncoupling completeness is improved, but the device complexity increases with additional valve bodies and control ports
Solution Approach 1:
The control assembly integrates multiple functions into a single device: it controls airflow timing, suspends uncoupling motion, and coordinates the sequence of mechanical and electrical coupler separation. This multi-functionality reduces the need for separate control components.
Solution Approach 2:
The control assembly merges the control of the uncoupling cylinder with the timing requirements of the propelling cylinders. By combining these control functions in one assembly with coordinated valve bodies, it reduces overall system complexity while ensuring complete uncoupling.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Ensures successful uncoupling of electrical couplers by preventing interference from mechanical coupler completion and delaying the mechanical coupler's uncoupling process until electrical couplers are fully separated, thereby avoiding seizure and ensuring complete uncoupling operations.
Implementation Method 1
a coupler uncoupling control mechanism featuring a second valve body that controls airflow to suspend the uncoupling motion of the propelling cylinder, a third valve body for delayed airflow cut-off, and a time-delay unit
Data Source
Figure 1
Figure 2(a)~2(c)
Figure 3~4
AI summary
A coupler uncoupling control mechanism is provided in the present application, comprising an uncoupling cylinder, a propelling cylinder and a control assembly, wherein the propelling cylinder is connected to a first valve body, and the first valve body comprises a first air inlet connected to the main reservoir pipe of the train, a first air outlet communicated with the first air inlet, a second air inlet and a second air outlet communicated with the second air inlet; the first air outlet is communicated with the air inlet chamber of the propelling cylinder, and the second air inlet is communicated with the air outlet chamber of the propelling cylinder. The control assembly comprises a second valve body and the second valve body is a pneumatic control valve; the second valve body comprises a third air inlet communicated with the uncoupling pipe of the train, a third air outlet communicated with the third air inlet, and a first control port capable of controlling airflow communication between the third air inlet and the third air outlet after being triggered; and, the third air inlet is communicated with the air inlet of the uncoupling cylinder, and the first control port is connected to the first air outlet of the first valve body. The present application can ensure that electrical couplers are uncoupled successfully.