Lorry Cab Tilting Coupling Eye for Dirt-Resistant Pivoting
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Solution Overview
Problem
Existing driver's cab tilting devices for trucks are sensitive to vehicle model variations, tolerances, and prone to dirt accumulation, leading to jamming and production difficulties due to complex design requirements and limited adaptability.
Innovation Solution
A tilting device with a pivot eye featuring a circular eyelet area and a slit-shaped link area allows free rotation and movement, decoupling the pivot pin from the driver's cab, eliminating the need for precise kinematic adaptation and enabling easy cleaning, and can be designed in two detachable parts for simplified assembly and disassembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an elongated hole with a lateral recess detent is used in the pivot eye, then the cab can be tilted upwards and prevented from tipping forward, but the design is sensitive to tolerances, accumulates dirt leading to jamming, and is difficult to manufacture
Solution Approach 1:
The pivot eye is divided into two separate parts: a first eye section forming the circular eye area and a second guide section forming the slot-shaped cam area. These parts can be detachably connected, allowing for simplified manufacturing of each component and easier assembly/disassembly of the tilting device.
Solution Approach 2:
Instead of using a complex lateral recess detent curve that must be precisely adapted to kinematics, the invention uses a simple circular eye area where the pivot pin is freely rotatable, combined with a slot-shaped cam area. The detent function is achieved differently through the interaction between the circular eye area and slot-shaped cam area, eliminating the need for precise detent curve adaptation.
2Reliability
If an elongated hole with a lateral recess detent is used in the pivot eye, then the cab can be tilted upwards and prevented from tipping forward, but the design is sensitive to vehicle model variations and tolerances
Solution Approach 1:
The circular eye area design with freely rotatable pivot pin provides a universal solution that is not sensitive to vehicle model variations. The simple geometric forms (circular eye area and slot-shaped cam area) can be easily adapted to different truck models without requiring precise kinematic adaptation, making the tilting device universally applicable.
3Reliability
If an elongated hole with a lateral recess detent is used in the pivot eye, then the cab can be tilted upwards and prevented from tipping forward, but dirt accumulates in the side recess leading to jamming of the tilting mechanism
Solution Approach 1:
Instead of using a closed lateral recess detent that traps dirt, the invention uses an open circular eye area design. The pivot pin is freely rotatable within this circular area, and any dirt that enters can be easily pushed aside by the rotating pin. The slot-shaped cam area is also open, allowing dirt to be expelled rather than accumulated, eliminating the jamming problem.
4Reliability
If a pivot eye with a lateral recess detent is used, then the cab tilting mechanism can prevent sudden tipping, but the design complexity increases and assembly/disassembly becomes difficult
Solution Approach 1:
The pivot eye is segmented into two simple parts: a first eye section with a circular eye area and a second guide section with a slot-shaped cam area. This segmentation simplifies the structure of each individual part while maintaining the functional requirements for reliable cab tilting control.
Solution Approach 2:
Instead of creating a complex integrated lateral recess detent structure, the invention inverts the approach by using simple geometric forms (circular eye area and slot-shaped cam area) that achieve the same functional result with much lower structural complexity.
5Device complexity
If the pivot pin is fixed in the pivot eye, then the tilting mechanism is simple, but the cab suspension movements are impeded
Solution Approach 1:
The pivot pin is made dynamic relative to the pivot eye, allowing it to move freely within the circular eye area during normal suspension movements. This dynamic capability ensures that the cab suspension can operate without impediment while the tilting function is activated when needed.
Solution Approach 2:
The pivot eye is divided into a first eye section with the circular eye area that allows free movement and a second guide section with the slot-shaped cam area that provides guidance during tilting. This segmentation enables both free suspension movement and controlled tilting motion.
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
The solution provides a versatile, wear-free, and easy-to-maintain tilting mechanism that is adaptable to various truck models, resistant to dirt, and reduces production complexity while ensuring secure hold and controlled tilting of the driver's cab.
Implementation Method 1
a hydraulic cylinder/piston assembly, which has at one end a linkage for attachment to the chassis of the truck and at the opposite end a linkage in the form of a pivot eye for attachment to the cab
Data Source
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AI summary
A tilting device for the driver's cab of a lorry comprises a hydraulic cylinder/piston unit which has a coupling at one end for fastening to the chassis of the lorry and a coupling at the opposite end for fastening to the driver's cab. As the coupling to the driver's cab, use is made of a coupling eye and a coupling pin which is to be attached to the driver's cab in a manner secure against being screwed in and which has an elongate cross section with a first, larger transverse extent and a second, smaller transverse extent. The eye opening of the coupling eye on the driver's cab side has a circular eye region, the inside diameter of which corresponds to the larger transverse extent of the coupling pin and which is adjoined in the longitudinal direction of the cylinder/piston unit, on the side facing away therefrom, by a slotted guide region, the slot width of which corresponds to the smaller transverse extent of the coupling eye.