Preloaded Chain Guide Elements for Secure Tool-Free Chain Access
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Solution Overview
Problem
Existing chain guides for vehicles with chain drives face issues of either requiring tools to open or closing, or being prone to unintentional opening during use, especially in rough conditions, leading to chain detachment.
Innovation Solution
A chain guide with preloaded guide elements that are transversely preloaded to maintain a secure clamping force, allowing tool-free opening and closing by releasing the preload before rotating the elements relative to each other.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the two block parts are held together with a snap-fit, then the block can be opened and closed without tools, but the snap-fit can open during travel, so that the block opens and the chain is no longer guided
Solution Approach 1:
The guide element is designed to rotate between a closed guiding position and an open maintenance position. This dynamic configuration allows the chain guide to adapt its state based on operational needs, providing secure closure during travel and easy access during maintenance without requiring tools.
Solution Approach 2:
The relative position between the first and second guide elements changes from a closed state (where they face each other to guide the chain) to an open state (where they are rotated apart to allow chain removal). This parameter change enables the dual functionality of secure guidance and easy maintenance access.
2Reliability
If the two block parts are screwed together, then the chain guide cannot be opened again without tools, but this makes it impractical to repair the chain on the way or to detach the chain
Solution Approach 1:
The guide element transitions from a static screwed-together design to a dynamic rotating mechanism. The guide element can be rotated to a maintenance position that opens the block without requiring tool removal, while still maintaining secure closure during normal operation through its preloaded engaged state.
Solution Approach 2:
The chain guide is divided into separable guide elements (first and second guide elements) that can be independently positioned. This segmentation allows one element to remain in place while the other rotates to an open position, enabling chain maintenance without completely disassembling the secured structure.
3Reliability
If the slider holds the chain in place with high clamping force, then the risk of chain falling off is minimized, but the slider cannot be opened easily for chain repair or detachment
Solution Approach 1:
The guide element rotates between a closed guiding position that provides strong chain retention and an open maintenance position that allows easy chain access. The dynamic transition between these states resolves the contradiction between secure holding and easy maintenance access.
Solution Approach 2:
The guide element is extracted or rotated away from its closed guiding position to an open position, temporarily removing the clamping function to allow chain maintenance, while the mounting structure remains in place. This selective extraction enables maintenance without complete disassembly.
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
Ensures the chain guide remains securely closed during operation while enabling easy tool-free maintenance, preventing chain detachment and facilitating easy access for repairs.
Implementation Method 1
the two guide elements are preloaded against each other by means of a preloading device, namely transversely to the running direction of the chain
Implementation Method 2
a high force is needed in order to rotate the two guide elements against each other
Data Source
AI summary
The present invention relates to a chain guide for a drive chain of a vehicle, the chain guide comprising a mounting part by means of which the chain guide is mounted on the vehicle, and a slider mounted on the mounting part for guiding the drive chain. The slider comprises a first guide element and a second guide element rotatable relative thereto, wherein the drive chain to be guided passes between these two guide elements when the chain guide is mounted on the vehicle. The two guide elements are preloaded against each other by means of a preloading device, transversely to the running direction of the chain.