Truck Cabin Tilt Hinge Assembly Aerodynamic Integration
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing tilting truck cabin hinge assemblies cause aerodynamic disturbances and noise due to the separation between the cabin and valances, and introduce unnecessary clearance that affects vehicle performance.
Innovation Solution
A truck cabin tilt mechanism featuring a pair of swivel arms pivotally mounted to the chassis beams with actuators and a latch, allowing controlled tilting of the cabin while maintaining aerodynamic integrity by integrating the valance as a unitary part, reducing noise and clearance issues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the cabin is hinged about a front pivot to give optimal access to the engine, then access to the engine is improved, but the enveloping parts of the cabin move about an arc and risk interference with vehicle wheels or chassis mounted components
Solution Approach 1:
The patent changes the hinge location from a front pivot (longitudinal dimension) to a rear pivot point (transverse dimension), allowing the cabin to tilt without the front envelope interfering with wheels or chassis components. This dimensional shift in pivot location resolves the interference problem while maintaining engine accessibility.
2Object-affected harmful factors
If sufficient clearance is allowed for wheel arch interference, then interference is prevented, but from an aerodynamic point of view any larger than strictly necessary clearance is objectionable
Solution Approach 1:
By moving the hinge to a rear pivot point, the patent changes the arc of movement trajectory, allowing the cabin envelope to clear wheels and chassis components without requiring excessive longitudinal clearance. This reduces aerodynamic disturbance while preventing interference.
3Object-affected harmful factors
If skirts or valances are fixed stationary to the chassis, then wheel arch interference is prevented, but aerodynamic disturbances occur due to physical separation between the cabin and the skirt or valance
Solution Approach 1:
The patent integrates the valance/skirt as a unitary part of the tilting cab rather than a separate stationary component. This merging allows the aerodynamic surface to remain continuous with the cabin during tilting, eliminating aerodynamic disturbances while the rear hinge geometry prevents wheel arch interference.
Solution Approach 2:
The patent makes the valance dynamic by integrating it with the tilting cabin, allowing it to move with the cabin rather than remaining stationary. This dynamic configuration maintains aerodynamic integrity during tilting while the rear hinge prevents interference with wheels.
4Shape
If a four member kinematic chain is used to create a virtual pivot point, then the cabin moves upwardly substantially vertically and pivots about a narrower arc, but additional free play about its four pivots causes noise production
Solution Approach 1:
The patent extracts the complex four-member kinematic chain and replaces it with a simpler single rear hinge mechanism. This elimination of intermediate links removes the multiple pivot points that generate free play and noise, while the rear hinge geometry still achieves the desired vertical upward movement and narrow pivoting arc.
Data Source
Figure 1~2
Figure 3
Figure 4~5
AI summary
Truck cabin tilt hinge assembly in a commercial motor vehicle (1) comprising a chassis (3) having a pair of parallel elongate chassis beams (9), an engine (11) mounted between the elongate beams (9) of the chassis (3), and a driver cab (7) positioned over the engine (11). The driver cab (7) is forwardly tiltable with respect to the chassis beams (9) to give access to the engine (11). The vehicle (1) further comprises a pair of opposite swivel arms (25), each of which swivel arms (25) is pivotally mounted with a lower end (37) to an associated one of the pair of chassis beams (9) for pivoting about a first pivot axis extending transversely below a forward end of the chassis beams (9). An upper end of the swivel arm (25) is pivotally receiving a lower forward portion (15) of the driver cabin (7) for pivoting about a second transverse axis extending upwardly of the chassis beams. A first actuator (31) is operatively interposed between the chassis (3) and the driver cabin (7), while a second actuator (35) is operatively interposed between the chassis (3) and at least one of the opposite swivel arms (25). A latch (47) is arranged to be selectively active between at least one of the opposite swivel arms (25) and the chassis (3).