Ratchet Wrench Disc Spacer for High-Torque Gear Alignment
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Solution Overview
Problem
Ratchet tools experience undesirable side bending and twisting loads, particularly in high-torque applications, leading to misalignment and reduced lifespan due to the use of retaining clips and bolted joints, which can deform, loosen, or break under these forces.
Innovation Solution
Incorporating a retaining clip and spacer within the ratchet tool design to stabilize the ratchet assembly, preventing vertical movement and misalignment, while accommodating varying tool sizes without the need for customized manufacturing of expensive components like pawls and ratchet gears.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If retaining clips and bolted joints are used to secure the ratchet assembly, then the assembly can be manufactured with standard components, but the clips and joints deform, loosen, or break under high-torque side bending and twisting loads
Solution Approach 1:
A spacer is introduced as an intermediary component between the ratchet assembly and the retaining clip. The spacer distributes the side bending and twisting loads away from the retaining clip and bolted joints, preventing deformation and breakage while allowing the use of standard manufacturing components.
2Ease of manufacture
If the ratchet assembly is secured with retaining clips and bolted joints, then assembly can be standardized, but misalignment occurs due to side bending and twisting loads
Solution Approach 1:
The spacer acts as a mediator that maintains proper alignment between the ratchet assembly and retaining clip by distributing lateral loads. This prevents misalignment while preserving standardized manufacturing processes.
3Stability of the object's composition
If retaining clips are used to secure the ratchet gear, then the gear can be retained in position, but the clips deform under high-torque conditions
Solution Approach 1:
The spacer is positioned between the ratchet gear and the retaining clip to distribute high-torque loads. This protects the retaining clip from deformation while maintaining the gear's positional stability.
4Ease of repair
If bolted joints are used to secure the ratchet assembly, then the assembly can be disassembled and reassembled, but the joints loosen under repeated high-torque loading
Solution Approach 1:
The spacer serves as a load-distributing intermediary that protects the bolted joints from loosening under repeated high-torque loading, while preserving the ability to disassemble and reassemble the assembly.
Data Source
AI summary
According to embodiments, a ratchet tool includes: a head operably connected to a handle, the head including at least one cavity, wherein the at least one cavity receives and attaches to a cover plate; a ratchet gear including a drive member for transmitting torque to a work piece; a pawl disposed in the at least one cavity adjacent the ratchet gear, wherein the pawl is operable to engage with the ratchet gear in a first position to transmit torque through the ratchet gear and drive member in a first direction and a second position to transmit torque through the ratchet gear and drive member in a second direction; a selector switch disposed in the at least one cavity and configured to move the pawl between the first position and the second position; a spacer disposed in the at least one cavity; and a retaining clip configured to inhibit an vertical movement of the ratchet gear in the at least one cavity.