Ratchet Tool Torque Limiting Deforming Blocking Structure
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Solution Overview
Problem
Conventional screwdriver tools lack a torque control mechanism, leading to potential damage from excessive torque, which can cause fasteners to loosen or be damaged, affecting their functionality and safety.
Innovation Solution
A ratchet tool with a driver body and unidirectionally rotatable sleeve member featuring a ratcheting structure that deforms and slides when relative torque exceeds a predetermined level, preventing overdriving and ensuring controlled torque application.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional screwdriver tools are used without torque control, then ease of operation is improved, but reliability deteriorates due to potential damage from excessive torque
Solution Approach 1:
The blocking structure is designed to deform at a predetermined torque threshold, changing the mechanical parameter of torque transmission. This allows the tool to operate freely below the threshold while automatically limiting torque above it, resolving the contradiction between ease of operation and reliability
Solution Approach 2:
The blocking structure acts as an intermediary element between the driver body and sleeve member. It mediates the torque transmission by deforming when torque exceeds the predetermined level, thereby protecting the fastener from damage while maintaining normal operation
2Reliability
If torque control mechanism is added to prevent overdriving, then reliability is improved, but device complexity increases
Solution Approach 1:
The blocking structure is designed to automatically deform and slide when torque exceeds the predetermined level, without requiring external control mechanisms. This self-regulating feature provides torque control while minimizing device complexity
Solution Approach 2:
The blocking structure is made with flexible material that can deform under excessive torque. This flexibility allows the torque control function to be achieved through material deformation rather than complex mechanical mechanisms, reducing device complexity
3Productivity
If excessive torque is applied, then productivity is improved by faster fastening, but object-affected harmful factors increase due to fastener damage
Solution Approach 1:
The blocking structure is pre-designed to deform at a specific torque threshold before fastener damage can occur. This preliminary protective action prevents the harmful effects of excessive torque while allowing high-speed operation up to the safe limit
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 ratchet tool effectively prevents damage to fasteners by limiting torque, ensuring secure fastening and safe operation by allowing only predetermined torque levels to be applied, thus enhancing the working quality and safety of the fastening process.
Implementation Method 1
at least one of the second blocking structure and the first blocking structure deforms and the second blocking structure is slidable over the first blocking structure in the rotation direction
Data Source
AI summary
A ratchet tool provided, including: a driver body, including a handle and a working rod connected with the handle, at least one of the handle and the working rod being integrally formed with a first blocking structure; at least one sleeve member, being disposed around and unidirectionally rotatable about the driver body, integrally formed with a second blocking structure, at least one of the first and second blocking structures being configured as a ratcheting structure, the second blocking structure being releasably stuck with the first blocking structure in a rotation direction; wherein when there is a relative torque greater than a predetermined torque between the at least one sleeve member and the driver body, at least one of the first blocking structure and second the blocking structures deforms and the second blocking structure is slidable over the first blocking structure in the rotation direction.