Rail Spare Brake Relay Circuit With Backup DC Motor Release
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Solution Overview
Problem
Existing braking systems for railroad vehicles require manual intervention to release the spare brake when the service brake mechanism fails, increasing operational workload during power failures.
Innovation Solution
A braking device with a spare electric motor and spare power supply, controlled by a relay circuit, allows automatic operation and release of the spare brake, reducing manual effort by using a separate power transmission mechanism and DC motor to drive the brake shoe.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a spring-actuated spare brake mechanism is used, then the spare brake can be activated when the service brake fails, but the spare brake cannot be released automatically and requires manual intervention
Solution Approach 1:
The spare brake mechanism is equipped with a release button that allows the operator to release the brake manually when needed. The spring automatically re-pressurizes the brake after release, enabling the system to serve itself without requiring complex automated control mechanisms
Solution Approach 2:
A release button serves as an intermediary control element between the operator and the spring-actuated brake mechanism. This simple mechanical interface allows the operator to override the spring's pressing action and release the brake when the service brake becomes available again
2Reliability
If a spring is used to actuate the spare brake, then the brake can be activated without power, but the spring cannot be automatically re-pressurized after release
Solution Approach 1:
The spring mechanism is designed to automatically re-pressurize the spare brake through the existing mechanical linkage when the release button is pressed and then released. The push rod's movement during button operation compresses the spring, eliminating the need for separate re-pressurization mechanisms
Solution Approach 2:
The spring is pre-loaded and positioned in the mechanical linkage such that normal operation of the release button automatically compresses the spring during the button's travel, preparing the spare brake for future activation without requiring additional power or complex mechanisms
3Device complexity
If manual intervention is required to release the spare brake, then the system remains simple, but the workload during service brake failure increases
Solution Approach 1:
The release button enables the operator to quickly release the spare brake with a simple manual action, and the spring automatically re-pressurizes the brake afterward. This self-service mechanism minimizes the time and effort required for manual intervention while maintaining system simplicity
Solution Approach 2:
The mechanical linkage is designed so that the act of pressing the release button automatically performs the spring compression action in advance, preparing the system for the next spare brake activation without requiring separate manual operations
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
Enables automatic operation and release of the spare brake, reducing the workload associated with manual intervention during service brake failures, ensuring safer and more efficient braking operations.
Implementation Method 1
DC motor 43 that supplies a shoe 21 with power... based on electricity supplied from a battery 41
Implementation Method 2
shoe 21 as a friction material that is pressed against a wheel... to brake the railroad vehicle
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A braking device (1) includes a brake mechanism (2) that presses a shoe (21) against a braking target member of a railroad vehicle to brake the railroad vehicle, a DC motor (43) that drives the brake mechanism (2) and that is different from a motor (33), a battery (41) that supplies electricity to the DC motor (43) and that is different from a vehicle power supply (31), and a relay circuit (42) that controls supply of electricity from the battery (41) to the DC motor (43) in response to a spare brake command. The battery (41) supplies DC electricity, the DC motor (43) drives the brake mechanism (2) based on the DC electricity, and the relay circuit (42) switches a path between the battery (41) and the DC motor (43) in response to a spare brake command.