Wrench Ratchet Mechanism Spring Ejection Prevention
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Solution Overview
Problem
Conventional reversing wrenches face issues with stability due to deformation and ejection of spring and abutment sleeve components, complex assembly procedures, and increased component loss during assembly, leading to reduced operational stability and increased assembly difficulty.
Innovation Solution
The design incorporates a wrench body with a control member, braking toothed member, and ratchet wheel, where the braking toothed member is connected to a link shaft jacketed with an elastic member, allowing for smooth movement and secure engagement, simplifying assembly and enhancing durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the spring and abutment sleeve are sandwiched between the ratchet wheel and control block, then the ratchet wheel can be pushed against the arcuate surface to generate one-way drive strength, but the abutment sleeve slides on the arcuate face and rubs laterally on the insertion hole, causing deformation or ejection of the sleeve and spring, reducing operational stability
Solution Approach 1:
The patent extracts the spring and abutment sleeve from the sandwiched configuration between the ratchet wheel and control block. Instead, the ratchet wheel is directly connected to the control block, and the spring is repositioned to act on the ratchet wheel from a different location, eliminating the lateral rubbing and deformation issues caused by the abutment sleeve sliding on the arcuate face.
Solution Approach 2:
The patent introduces a new intermediary structure where the ratchet wheel is directly connected to the control block through a simplified interface. This eliminates the need for the abutment sleeve to slide on the arcuate face, as the connection is made through direct engagement or a different mechanical interface that prevents lateral rubbing and deformation.
2Ease of manufacture
If the control block is first installed and secured into the second chamber, then the spring can be placed into the socket from the first chamber, but the opening of the first chamber faces the rotating member making it difficult to mount the spring, and small components are easy to fall or lose during assembly
Solution Approach 1:
The patent applies preliminary action by pre-configuring the spring and abutment sleeve assembly before final installation. The spring is pre-loaded or pre-positioned in a convenient location, and the abutment sleeve is pre-attached to the ratchet wheel or control block, allowing for easier and more reliable assembly without the risk of small components falling or losing during the process.
Solution Approach 2:
The patent merges the spring and abutment sleeve into a single integrated assembly or attaches them firmly to larger components before final installation. This combining approach ensures that small components do not separate or fall during assembly, reducing assembly difficulty and preventing component loss.
3Stability of the object's composition
If the abutment sleeve is pushed against the arcuate surface by the spring, then the space for the ratchet wheel is maintained, but the sleeve and spring protrude beyond the insertion hole, reducing the positioning effect
Solution Approach 1:
The patent creates a copy or duplicate function by providing alternative positioning structures or features that maintain the ratchet wheel space without relying on the abutment sleeve protruding beyond the insertion hole. The positioning function is achieved through a different mechanism that does not compromise precision.
Solution Approach 2:
The patent shifts the solution to another dimension by maintaining the ratchet wheel space through a different spatial arrangement. Instead of using the protruding sleeve and spring, the space is maintained through a different geometric configuration or positioning mechanism that preserves both the space requirement and the positioning precision within the insertion hole.
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 enhances operational stability, simplifies assembly, and reduces labor costs by ensuring reliable engagement and preventing deformation or ejection of components, thereby improving the wrench's durability and economic efficiency.
Implementation Method 1
an elastic member 34 is jacketed by the link shaft 33
Data Source
AI summary
A wrench has a wrench body, a control member, a braking toothed member and a ratchet wheel. The wrench body has a first and a second operating portions. The first operating portion has an assembling aperture and a control aperture, a control member having a handle and a shaft rod, the shaft rod provided with a stepped through hole and disposed in the control aperture; a braking toothed member disposed in the arcuate groove, an end of the braking toothed member has a toothed portion and a convex groove, the convex groove connected to a link shaft via a connecting pin, the link shaft jacketed by an elastic member and together disposed in the through hole. The ratchet wheel disposed in the assembling aperture, an annular toothed portion disposed on a periphery of the ratchet wheel and engaging with the toothed portion of the braking toothed member.