Vehicle Cab Tilt Apparatus with Viscous Isolator
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Solution Overview
Problem
Existing vehicle cab connection systems to chassis do not effectively allow for tilting of the cab to facilitate easy access and maintenance of components positioned beneath or blocked by the cab, limiting serviceability and maintenance efficiency.
Innovation Solution
A tiltable cab connection system utilizing a viscous isolator, pin receptors, and a retainer, which allows the cab to tilt relative to the frame about a pin, with a clearance for rotation and vibration, enabling the cab to move beyond 45 degrees and providing damping to reduce vibrations and sudden movements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the cab is rigidly connected to the frame, then structural stability is improved, but serviceability deteriorates because components beneath the cab cannot be easily accessed
Solution Approach 1:
The connection between the cab and frame is made dynamic through the viscous isolator, which allows the cab to tilt relative to the frame during maintenance while maintaining structural stability during operation. The isolator provides damping to control the motion, enabling the cab to be positioned at angles greater than 45 degrees for improved access to underlying components.
2Reliability
If the cab is rigidly connected to the frame, then structural stability is improved, but vibrations and sudden accelerations worsen
Solution Approach 1:
The viscous isolator acts as an intermediary element between the cab and frame, absorbing and damping vibrations and sudden accelerations while maintaining structural stability. This isolator reduces the transmission of harmful vibrations to the cab without compromising the overall structural integrity of the vehicle.
3Reliability
If a retainer is added to constrain the pin receptor, then reliability is improved, but device complexity worsens
Solution Approach 1:
The connection system is segmented into distinct functional components: the viscous isolator for damping, the pin for rotation, and the retainer for lateral constraint. This segmentation allows each component to perform its specific function effectively while maintaining overall system reliability without excessive complexity.
4Ease of repair
If clearance is provided for cab rotation, then serviceability is improved, but stability deteriorates
Solution Approach 1:
The viscous isolator changes its damping parameters based on the operational state. During normal operation, it provides sufficient damping to maintain stability, while during maintenance operations it allows greater movement range. The retainer further controls the lateral position, ensuring stability is maintained even when the cab is tilted at angles greater than 45 degrees for improved serviceability.
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 easy access to components beneath the cab for maintenance, improves serviceability, and reduces vibrations and sudden accelerations during operation by allowing the cab to tilt smoothly and securely, enhancing the overall maintenance and operational efficiency of the vehicle.
Implementation Method 1
a viscous isolator mounted to the frame... providing damping to reduce vibrations and sudden movements
Data Source
AI summary
A vehicle is disclosed which includes a frame with a viscous isolator, a first pin receptor, a retainer, a cab, and a pin. The first pin receptor includes a base portion mounted to the viscous isolator and a top portion movable within a limited range relative to the frame. The retainer is detachably mounted to the frame such that the top portion of the first pin receptor protruding through an aperture in the retainer, and the base portion of the first pin receptor is below the aperture. A pin is received by the top portion of the first pin receptor and a second pin receptor included in a cab, rendering the cab tiltable relative to the frame about the pin. The aperture of the retainer and the base portion of the first pin receptor are each configured such that the base portion cannot pass through the aperture.