Roller Wrench Reversing Mechanism With Elastic Roller Positioning
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Solution Overview
Problem
Conventional roller wrenches face manufacturing cost and complexity issues due to the need for multiple positioning holes and elastic components, leading to unreliable positioning of rollers and the reversing knob.
Innovation Solution
A roller wrench design featuring a regular polygonal driving member with elastic positioning components that can move into or protrude from the driving member, simplifying the manufacturing process and ensuring reliable positioning of rollers and the reversing knob.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple positioning holes and elastic components are installed in the driving member and reversing knob, then the positioning function is enhanced, but the manufacturing cost and device complexity increase
Solution Approach 1:
The patent extracts the positioning function from the complex multi-hole and multi-component system and concentrates it into a single elastic positioning component with protrusions. This component directly engages with corresponding structures on the reversing knob and drive head, eliminating the need for multiple positioning holes and separate elastic components, thereby reducing manufacturing complexity while maintaining positioning reliability
Solution Approach 2:
The patent merges multiple positioning functions into a single integrated elastic positioning component. This component combines the functions of multiple positioning holes, multiple elastic elements, and multiple positioning protrusions into one unified structure that simultaneously ensures accurate positioning of both the reversing knob and drive head, reducing the overall number of parts and assembly steps
2Reliability
If multiple positioning holes and elastic components are installed in the driving member and reversing knob, then the positioning function is enhanced, but the manufacturing cost increases
Solution Approach 1:
The patent extracts the positioning function from the complex multi-hole and multi-component system and concentrates it into a single elastic positioning component with protrusions. This component directly engages with corresponding structures on the reversing knob and drive head, eliminating the need for multiple positioning holes and separate elastic components, thereby reducing manufacturing complexity while maintaining positioning reliability
Solution Approach 2:
The patent employs a simple elastic positioning component that can be easily manufactured and potentially replaced if needed. The design uses basic elastic elements and geometric features rather than complex precision-machined components, making the overall system more cost-effective and easier to manufacture while still providing reliable positioning functionality
3Ease of manufacture
If positioning holes are disposed with small hole diameter and shallow depth, then the manufacturing process is simplified, but the elastic positioning components slide out easily causing unreliable positioning
Solution Approach 1:
Instead of creating deep holes to retain positioning components, the patent inverts the approach by having the positioning component (elastic element with protrusions) actively engage with external geometric features on the reversing knob and drive head. The positioning is achieved through outward protrusions rather than inward holes, eliminating the problem of components sliding out while keeping the manufacturing process simple
Solution Approach 2:
The patent extracts the positioning function from the complex multi-hole and multi-component system and concentrates it into a single elastic positioning component with protrusions. This component directly engages with corresponding structures on the reversing knob and drive head, eliminating the need for multiple positioning holes and separate elastic components, thereby reducing manufacturing complexity while maintaining positioning reliability
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 reduces manufacturing costs and complexity while providing reliable positioning of rollers and the reversing knob, enhancing the wrench's operational efficiency and durability.
Implementation Method 1
at least one elastic positioning component, each of the elastic positioning components is installed on one of the sides of the driving member, and capable of elastically moving into the driving member or protruding from a peripheral surface of the driving member
Data Source
AI summary
A roller wrench having a body with a circular chamber; a driving member being a regular polygonal component capable of rotating in the chamber; 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; a reversing knob capable of driving the rollers to move in the chamber so that each of the rollers moves between two edges of each of sides of the driving member; and at least one elastic positioning component installed on one of the sides of the driving member, and capable of elastically moving into the driving member or protruding from a peripheral surface of the driving member. The elastic positioning component is moved into the driving member when being compressed; and is protruded from the driving member when not being acted on by an external force.