Load Carrier Clamping Contours Eliminate Vibration
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Load carriers for motor vehicles tend to vibrate and produce rattling noises when in the rest position during vehicle operation due to inadequate clamping, leading to undesirable noise and potential wear.
Innovation Solution
The load carrier incorporates a press fit mechanism with clamping and counter-clamping contours that engage in both rest and use positions, utilizing inclined surfaces and resilient materials to ensure a secure fit, reducing vibrations and noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the carriage is held in the rest position by a locking arrangement without clamping, then the structure is simple, but the carriage vibrates and produces rattling noises during vehicle operation
Solution Approach 1:
The clamping mechanism is divided into separate clamping contours on the guide rail and counter-clamping contours on the runner rail, allowing independent optimization of each component while working together to eliminate vibrations
Solution Approach 2:
The clamping mechanism transitions from a static locking arrangement to a dynamic press fit system that automatically adjusts clamping force during carriage movement, maintaining contact between rails throughout the adjustment range
2Object-affected harmful factors
If clamping contours are added to eliminate vibrations, then rattling noises are reduced, but the device complexity increases
Solution Approach 1:
The clamping contours are integrated into the existing guide rail and runner rail structures, combining the guiding and clamping functions into a single unified system rather than adding separate clamping devices
Solution Approach 2:
The guide rails and runner rails serve dual purposes: providing guidance for carriage movement and simultaneously creating the press fit through their clamping and counter-clamping contours
3Object-affected harmful factors
If the carriage is clamped in the rest position, then vibrations are reduced, but the adjustment mechanism becomes more complex
Solution Approach 1:
The clamping mechanism is passive and self-activating, using the natural movement of the carriage and the geometry of the inclined surfaces to automatically engage the press fit without requiring additional actuators or control systems
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 effectively eliminates rattling noises and enhances the stability of the load carrier by providing a secure press fit between the carriage and the guide base, even when carrying small loads, through the use of clamping and counter-clamping contours that interact in a wedging action.
Implementation Method 1
relatively flexible plastic material is used for the clamping body or counter-clamping body or both, which has a certain resilience or elasticity at least in the area of the clamping contour or counter-clamping contour
Implementation Method 2
The at least one clamping contour or the at least one counter-clamping contour or both can be relatively stationary, i.e. not yielding at all. It is also conceivable that relatively flexible plastic material is used for the clamping body or counter-clamping body or both, which has a certain resilience or elasticity
Data Source
AI summary
The invention relates to a load carrier (10) for a motor vehicle (13), in particular a passenger car, with a slide guide base (11), in particular for mounting on a load carrier receptacle (22) of the motor vehicle (13), and with a slide (12) guided on the slide guide base (11) and adjustable along a longitudinal axis (26) between a rest position (R) and a working position (G), wherein the slide (12) in the working position (G) in particular for carrying a load projects further in front of the slide guide base (11) than in the rest position (R), wherein the slide (12) is guided on the slide guide base (11) by means of guide rails (24) on which runner rails (39) or rollers are guided.The load carrier (10) is provided to have at least one clamping contour (71) on a clamping body (61) associated with the rest position (R) or the operating position (G) and at least one counter-clamping contour (91, 53) on a counter-clamping body (90) that interacts with the clamping contour (71), which are arranged on the slide guide base (11) and the slide (12) and which engage with each other by a movement of the slide (12) in the direction of a longitudinal position with respect to the longitudinal axis (26), in particular the rest position (R) or the operating position (G), in order to clamp the slide (12) with respect to the slide guide base (11) in a clamping fit.