Roller Wrench Reversing Knob Structure for Synchronized Roller Engagement
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Solution Overview
Problem
Conventional roller wrenches face manufacturing difficulties and high costs due to complex structures, and suffer from reduced operating torque and effectiveness due to inconsistent roller engagement and manufacturing tolerances.
Innovation Solution
A roller wrench design featuring a regular polygonal driving member with rollers arranged in a circle, connected to a reversing knob via pivot shafts, allowing simultaneous and reliable engagement of rollers with latching surfaces, eliminating the need for complex walls and ensuring synchronized movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If six walls are protrudingly provided on the bottom surface of the reversing knob to restrain the rollers, then the rollers can be limited in the limiting grooves, but the reversing knob becomes difficult to manufacture and costs increase
Solution Approach 1:
The patent removes the complex six-wall protruding structure from the reversing knob while maintaining the limiting grooves. The rollers are restrained solely by the groove geometry and elastic positioning components, eliminating the need for additional protruding walls and simplifying the reversing knob manufacturing process.
Solution Approach 2:
The patent divides the roller restraint function into two separate mechanisms: the limiting grooves provide the primary restraint structure, while the elastic positioning components (such as springs or elastomers) provide the secondary positioning and engagement force. This segmentation allows each component to be optimized independently for manufacturing and function.
2Ease of manufacture
If gaps between the limiting grooves and rollers are inconsistent due to manufacturing tolerances, then the structure is simpler, but the rollers cannot be driven to move together simultaneously, reducing latching effectiveness and operating torque
Solution Approach 1:
The patent introduces elastic positioning components that can dynamically adjust to accommodate manufacturing tolerances. These elastic elements compress or extend to equalize the gaps between rollers and limiting grooves, ensuring all rollers are driven simultaneously even when initial gaps vary due to manufacturing variations.
Solution Approach 2:
The patent uses the elastic properties of the positioning components to change the effective gap parameters. By selecting appropriate elastic material properties and component geometries, the system compensates for manufacturing tolerances and ensures uniform roller engagement across different production batches.
3Reliability
If the reversing knob structure includes six walls and limiting grooves, then the rollers can be restrained, but the overall device complexity increases
Solution Approach 1:
The patent extracts the roller restraint function from the reversing knob body itself and implements it through separate, simpler components: limiting grooves formed in the knob and elastic positioning components. This reduces the reversing knob to a basic rotating element while maintaining reliable roller positioning.
Solution Approach 2:
The limiting grooves serve multiple functions: they guide the rollers, provide restraint forces, and work in conjunction with the elastic positioning components to ensure synchronized roller movement. This multi-functionality reduces the need for additional specialized structures in the reversing knob.
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 design simplifies manufacturing, reduces costs, and ensures effective latching and torque transmission by ensuring all rollers engage properly, enhancing the wrench's operational efficiency and reliability.
Implementation Method 1
one end of each of the rollers is rotatably pivotally connected to one end surface of the reversing knob by a pivot shaft
Implementation Method 2
the reversing knob drives the rollers to move in the chamber, so that each of the rollers moves between one edge and another edge of each of the sides of the driving member
Implementation Method 3
each of the rollers, each of the corresponding latching surfaces 151 and the peripheral wall 13 of the chamber 12 are latched with one another
Implementation Method 4
the wrench 10 can drive the driving member 14 to turn clockwise
Data Source
AI summary
The invention relates to a roller wrench comprising: a body with a circular chamber; a driving member being a regular polygonal component capable of rotating in the chamber; and a plurality of rollers installed in the chamber, Each of the rollers is located between a side of the driving member and a peripheral wall of the chamber; one end of each of the rollers is pivotally connected to an end surface of a reversing knob, so that the reversing knob drives the rollers to displace simultaneously. Thereby, the components of the roller wrench can be effectively latched with one another, and a torque value of the roller wrench will not be reduced.