Mechanical Tensioner Collar Lock for Adjustable Installation Position
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing mechanical tensioners lack an efficient mechanism for adjustable positioning, making installation and operation cumbersome, especially in confined spaces.
Innovation Solution
The automatic mechanical tensioner assembly features a hollow sleeve, moveable housing, anti-rotation washer, spring, and collar, allowing for a shipping and installation position that facilitates easy installation by compressing the spring and locking the assembly in place, followed by a working position where the collar is removed, enabling tensioning of chains or belts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the tensioner uses a fixed positioning mechanism, then the structure is simple, but the adaptability to different installation positions is poor
Solution Approach 1:
The tensioner employs a dynamic positioning mechanism where the housing can be locked at different positions along the mounting surface. The moveable housing contains a series of positioning holes that can be selectively engaged with mounting pins, allowing the tensioner to adapt to various installation positions while maintaining structural simplicity through a straightforward locking mechanism.
Solution Approach 2:
The positioning system is segmented into discrete positioning holes distributed along the housing, each representing a potential installation position. This segmentation allows selective engagement at different locations without requiring a completely different mechanism for each position, thereby achieving versatility with minimal complexity.
2Ease of operation
If the spring is uncompressed during installation, then the tensioning force is maximized, but the installation process becomes difficult in confined spaces
Solution Approach 1:
The installation mechanism incorporates a preliminary compression of the spring during the installation process. The moveable housing is designed to be inserted in a compressed state, with the spring pre-compressed between the moveable housing and the fixed housing. Once installed, the housing can be locked in place, and the spring subsequently expands to generate the required tensioning force on the chain or belt.
3Reliability
If the tensioner allows movement during operation, then the tensioning adjustment is flexible, but the stability of the tensioned component deteriorates
Solution Approach 1:
The tensioner implements a dynamic locking mechanism that transitions between a locked state for stable operation and an unlocked state for adjustment. During normal operation, the housing is locked to the mounting surface, providing stable tensioning. When adjustment is needed, the locking mechanism can be released, allowing the housing to move and reposition, after which it can be locked again at the new position.
4Ease of operation
If the collar remains engaged during operation, then the positioning is secure, but the tensioning function cannot be performed
Solution Approach 1:
The collar serves as a temporary positioning aid during installation that must be removed for the tensioner to function. The collar is engaged with the hollow sleeve during installation to maintain proper positioning and alignment. Once the tensioner is installed and the chain or belt is tensioned, the collar is removed to allow the moveable housing to move freely for tensioning operations.
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
This design simplifies installation and operation by providing a secure, adjustable positioning mechanism that enhances ease of use and reduces complexity in tight spaces, ensuring effective tensioning of chain drive systems.
Implementation Method 1
The spring between the moveable housing and the anti-rotation washer, biasing the moveable housing towards the first end of the hollow sleeve
Implementation Method 2
The ratchet clip is received within the ratchet clip groove of the moveable housing and engageable with the plurality of circumferential teeth of the hollow sleeve
Data Source
AI summary
An automatic mechanical tensioner assembly with a shipping and installation position in which a collar engages a fixed hollow sleeve, limiting or securing a moveable tensioner housing in place against the force of a spring. The collar has a semicircular body defining an inner circumference extending from a first end to a second end of the body. The semicircular body has two axially extending flanges defining a cutout, and a collar tab extending radially from the semicircular body. In the shipping and installation position, the first end of the collar engages with a delivery groove of the hollow sleeve, biasing the moveable housing towards an anti-rotation washer engaged with an end of the fixed hollow sleeve and compressing the spring.