Safe Key Park Brake Integrated Locking Mechanism
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Solution Overview
Problem
Current air brake systems lack a secure and integrated mechanism to control the 'push to release' function, which is critical for safe vehicle parking, as existing solutions do not effectively prevent unauthorized access or accidental dismounting of the brake valve rod.
Innovation Solution
The Safe Key Park Brake (SKPB) integrates a centered key and lock system with a beveled-shaped threaded piston and lock nut, secured by stainless steel and brass nickel components, ensuring the air brake valve rod is only accessible and adjustable with the key, utilizing 3D printing for robust construction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a key and lock system is integrated into the air brake valve rod, then security against unauthorized access and accidental dismounting is improved, but device complexity increases
Solution Approach 1:
The patent combines the key and lock system directly with the air brake valve rod assembly, merging multiple functions (locking, unlocking, valve control) into a single integrated unit. This integration provides secure control while avoiding the need for separate, additional components that would increase complexity further.
Solution Approach 2:
The valve rod assembly serves multiple functions: it acts as the structural component for the brake valve, the locking mechanism for security, and the control element for brake release. This multi-functionality reduces the need for separate components, addressing the complexity concern while maintaining security.
2Reliability
If a beveled-shaped threaded piston with lock nut is used, then prevention of unauthorized dismounting is improved, but ease of operation deteriorates
Solution Approach 1:
The beveled-shaped threaded piston and lock nut are pre-configured in specific orientations that enable secure locking. The preliminary arrangement of these components ensures that unauthorized dismounting is prevented while allowing authorized operation through the designated key mechanism.
Solution Approach 2:
The key acts as an intermediary element that mediates between the user and the locked valve rod. The key interacts with the keyhole in the valve rod assembly, enabling authorized users to overcome the security mechanism and access the valve without requiring force or complex procedures.
3Ease of manufacture
If 3D printing is used for manufacturing components, then ease of manufacture is improved, but manufacturing precision may worsen
Solution Approach 1:
The patent utilizes 3D printing technology to manufacture components with optimized parameters for both ease of manufacture and acceptable precision. By selecting appropriate printing parameters, materials, and post-processing techniques, the design achieves a balance between manufacturing simplicity and functional requirements for the mechanical components.
Data Source
AI summary
The Safe Key Park Brake (SKPB) knob is a lever with an integrated centered key locking system to prevent unauthorized operation of air brake vehicles. The SKPB is also designed as an anti-theft device. Air brake levers are always active and accessible whether the engine is on or off. In an emergency, such as assisting a passenger, with the SKPB in place the driver can safely assist without running the risk of the vehicle being exposed to danger. The SKPB is locked by a key that turns clockwise into the key shaft. This prevents the “push to release” function of the brake. To regain full operation, the key is turned counterclockwise. This allows full operation of the “push to release” function. The SKPB has a quick and easy-to-apply key locking feature. An alternative solution to securing a park brake is creating closure around the vehicle operator's area.