Continuous Sliding Body for Engine Chain Guide Rail
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional tensioning or guide rails for chain drives in internal combustion engines face challenges in achieving low friction, low weight, and compact design while maintaining structural integrity and cost-effectiveness, particularly due to high demands on strength and sliding characteristics.
Innovation Solution
A continuous one-piece sliding body with a wavelike carrier body design, featuring chain guide sections and a recessed section, reduces friction by dividing the resultant force and using low-friction plastic material, with optional downholders and trusslike stiffeners for enhanced strength and assembly efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a continuous one-piece sliding body is used, then assembly costs and friction are reduced, but manufacturing complexity increases
Solution Approach 1:
The patent merges multiple sliding bodies into a single continuous one-piece sliding body that spans across multiple chain guide sections. This integration eliminates the need for separate components and fastenings, reducing assembly complexity and costs while maintaining the low-friction benefits across all contact surfaces.
Solution Approach 2:
The continuous sliding body is designed with recessed sections that align with non-contact areas of the drive chain, creating functional segments within a unified structure. This segmentation allows the sliding body to maintain contact only where necessary, reducing friction while preserving manufacturing efficiency.
2Strength
If the sliding body contacts the drive chain in the recessed section, then friction increases, but structural integrity is improved
Solution Approach 1:
The patent extracts or removes material from the sliding body in the recessed section to create a non-contact zone. This extraction allows the drive chain to pass through without contact in this area, eliminating friction in the recessed section while the overall continuous structure maintains structural integrity.
Solution Approach 2:
The sliding body exhibits local quality variations: it maintains full contact in chain guide sections for structural support, but creates non-contact recessed sections to minimize friction. This localized differentiation optimizes both structural integrity and friction reduction in different functional zones.
3Object-generated harmful factors
If multiple separate sliding linings are used, then friction is reduced, but assembly complexity and costs increase
Solution Approach 1:
The patent combines multiple separate sliding linings into a single continuous sliding body that provides low-friction contact across all necessary chain guide sections. This merger eliminates the need for multiple fastenings and complex assembly procedures while maintaining the friction-reduction benefits of dedicated sliding surfaces.
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 reduces friction and assembly costs, allows for a cost-effective production process, and enhances the structural integrity and guiding capabilities of the tensioning or guide rail, while maintaining a compact and lightweight design.
Implementation Method 1
a continuous sliding body is provided, which is arranged on the carrier body along the at least two chain guide sections and the at least one recessed section... allows the use of the sliding body that can be produced from a low-friction plastic material for configuring the sliding-contact surface
Data Source
AI summary
A tensioning or guide rail for a drive chain, in particular for a chain drive of an internal combustion engine, comprises a carrier body with at least two chain guide sections and with at least one recessed section. The at least one recessed section is arranged between two chain guide sections and recessed relative to a tangent connecting the adjoining chain guide sections, the at least two chain guide sections having each a sliding-contact surface for contacting the drive chain. A continuous sliding body is arranged on the carrier body along the at least two chain guide sections and the at least one recessed section, the sliding body defining the sliding-contact surfaces of the at least two chain guide sections and a surface of the at least one recessed section, the surface facing the drive chain.