Ratchet Wrench Retention via Segmented Rings
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Solution Overview
Problem
Conventional ratchet wrenches require time-consuming and complex processing for features like annular tracks and radial protrusions, leading to potential assembly inaccuracies and unsmooth operation.
Innovation Solution
A ratchet wrench design featuring a wrench main body with a through hole and accommodating room, a ratchet wheel with upper and lower annular grooves, and two retainers for easier assembly and retention, eliminating the need for intricate processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the wrench main body is processed with annular track, annular groove and radial protrusion for retaining the ratchet wheel, then the ratchet wheel can be retained in the accommodating trough, but the processing becomes time-consuming and complicated, and assembly accuracy is affected
Solution Approach 1:
The invention divides the retention function into two separate components: a retaining ring that provides radial retention and a covering ring that provides axial retention. This segmentation allows each component to be simpler in structure while collectively achieving the same retention reliability as the complex integrated features in conventional designs.
Solution Approach 2:
The invention extracts the retention functionality from the wrench main body itself and implements it through separate, dedicated retaining components (retaining ring and covering ring). This extraction simplifies the wrench main body structure and reduces processing complexity while maintaining effective ratchet wheel retention.
2Reliability
If the wrench main body is processed with annular track, annular groove and radial protrusion, then the ratchet wheel can be retained, but the processing inaccuracy affects assembly accuracy and results in unsmooth operation
Solution Approach 1:
By segmenting the retention system into separate rings, each with a specific retention function, the invention reduces the cumulative effect of processing inaccuracies. Each ring can be manufactured and assembled independently, allowing for better control of assembly accuracy compared to multiple complex features processed on a single component.
Solution Approach 2:
Extracting the retention features from the wrench main body into separate retaining rings eliminates the need for complex processing on the main body, thereby reducing the source of potential manufacturing inaccuracies and improving overall assembly precision.
3Reliability
If the ratchet wheel is retained by multiple features on the wrench main body, then the retention is secure, but the assembly process becomes complicated and time-consuming
Solution Approach 1:
The segmented retention system with separate retaining ring and covering ring allows for more straightforward assembly steps compared to installing multiple complex features on the wrench main body. Each ring can be independently positioned and secured, streamlining the assembly process while maintaining secure retention.
Solution Approach 2:
By taking out the retention functionality into separate components, the invention simplifies the assembly process as each component has a dedicated function and can be installed in a straightforward manner, reducing the time and complexity associated with assembling multiple integrated features.
Data Source
AI summary
A ratchet wrench includes a wrench main body provided at an end thereof with a through hole, wherein a ratchet wheel is disposed, which is provided from top to bottom thereof in order with an upper ratchet portion, an upper annular groove, a middle ratchet portion, a lower annular groove and a lower ratchet portion. The upper and lower ratchet portions both protrude out of the through hole. The middle ratchet portion is located in the through hole. Two retainers are respectively disposed in the upper and lower annular grooves located out of the through hole, for retaining the ratchet wheel in the through hole. As a result, in the ratchet wrench of the present invention, the wrench main body doesn't need much processing, thereby improved in processing convenience. Besides, the installation of the members is convenient and firm, thereby benefiting the operation of the ratchet wheel.