Chain Tensioner Pressure Adjustment for Stable Oil Chamber Pressure
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional tensioners face challenges in stabilizing oil pressure in the oil pressurizing chamber due to fluctuations in force from the chain side and oil supply, leading to increased oil consumption and potential oil leakage, which results in unstable tension and increased power requirements for the oil pressure generation source.
Innovation Solution
A tensioner with a pressure adjustment unit that includes a unit case attached to the housing or plunger, a moving member capable of moving closer to and farther from the oil pressurizing chamber, and a pressure adjustment biasing unit that maintains a liquid-tight gap at any position, allowing the moving member to increase the oil pressurizing chamber capacity and reduce the pressing force on the chain, thereby stabilizing oil pressure and preventing oil leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stress or pressure
If a relief mechanism with a valve body is used to release oil when pressure increases, then oil pressure can be relieved, but oil consumption increases and power requirements increase
Solution Approach 1:
The invention extracts the harmful function of completely releasing oil to the outside and replaces it with a controlled internal redistribution mechanism. The relief oil is directed into a storage chamber within the tensioner assembly rather than being discharged externally, thus relieving pressure while retaining the oil for future use.
Solution Approach 2:
Instead of discarding the relief oil to the outside environment, the system recovers it by channeling it into a storage chamber. This allows the oil to be retained and reused when needed, eliminating continuous oil consumption while maintaining effective pressure relief capability.
2Stress or pressure
If a relief mechanism with a valve body is used to release oil when pressure increases, then oil pressure can be relieved, but the power of the oil pressure generation source needs to be increased
Solution Approach 1:
The invention removes the need for high-power relief mechanisms by extracting the excess oil and redirecting it to a storage chamber instead of requiring powerful external relief valves. This internal redistribution requires minimal energy compared to traditional high-power relief systems.
Solution Approach 2:
The tensioner assembly serves its own pressure relief needs through the internal storage chamber mechanism, eliminating the requirement for high-power external relief systems. The system self-regulates pressure by redistributing oil internally rather than requiring powerful external intervention.
3Stress or pressure
If the valve body moves forward under oil pressure to allow oil flow, then oil can be released, but the oil pressure is hard to stabilize
Solution Approach 1:
The invention employs a dynamic pressure regulation mechanism where the movable member can shift positions based on pressure conditions. This allows the system to adapt between different states (normal operation, pressure relief, stabilization) rather than being fixed in a single relief mode, thereby achieving pressure stability.
Solution Approach 2:
The system incorporates feedback through the movable member that responds to pressure changes and adjusts the flow characteristics accordingly. When pressure stabilizes, the movable member's position automatically adjusts to maintain that stability, creating a self-regulating feedback loop that prevents pressure fluctuations.
4Stress or pressure
If oil is partly released to the outside when pressure increases, then pressure relief is achieved, but assembly complexity increases
Solution Approach 1:
The invention merges the pressure relief function with the housing structure by integrating the storage chamber directly into the housing. This combination eliminates the need for separate external relief components and simplifies the overall assembly while maintaining effective pressure relief capability.
Solution Approach 2:
The housing serves multiple functions: it contains the plunger, provides structural support, and incorporates the storage chamber for relief oil. This multi-functionality reduces the number of separate components needed, thereby simplifying assembly while achieving pressure relief.
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 stabilizes oil pressure and reduces oil consumption by preventing partial oil release, maintaining oil in the chamber for longer periods, and reducing the burden of assembling the tensioner, while allowing for precise adjustment and design flexibility.
Implementation Method 1
a main spring 540 extensively contained in the oil pressurizing chamber 511 formed between the plunger 520 and the plunger container hole 531 to forwardly bias the plunger 520
Implementation Method 2
a relief spring 552 disposed in the spring container chamber 512 to bias the valve body 560 toward the oil pressurizing chamber 511
Implementation Method 3
a pressure adjustment biasing unit that biases the moving member toward the oil pressurizing chamber
Data Source
AI summary
Provided is a tensioner capable of stabilizing an oil pressure in an oil pressurizing chamber. The tensioner includes a pressure adjustment unit. The pressure adjustment unit includes a unit case attached to the housing or the plunger, a moving member disposed in the case inner space to be capable of moving closer to and farther away from the oil pressurizing chamber, and a pressure adjustment biasing unit which biases the moving member toward the oil pressurizing chamber. A gap between an inner wall of the case inner space and the moving member is configured to be held in a liquid tight state at any position between a position where the moving member is closest to the oil pressurizing chamber as a result of moving and a position where the moving member is most distant from the oil pressurizing chamber.