Open End Wrench Jaw Guide for High Torque Stability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional open end wrenches face issues such as wobbling, disengagement, spring deformation, contamination, and reduced structural strength, which hinder efficient and reliable high-torque driving operations.
Innovation Solution
An open end wrench design featuring integrally formed jaws with an arcuate sliding groove and a slide that includes an arcuate guiding slot, free of holes and recesses, to prevent disengagement and enhance structural strength, allowing smooth and stable operation under high torque.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the movable jaw is forced against the abutment by a spring, then the movable jaw can be retained in position, but the exposed portion of the spring is liable to bend and deform permanently
Solution Approach 1:
The spring is nested within the hollow cylindrical guide structure. The guide provides external support to the spring, preventing it from bending or deforming during compression while allowing the spring to maintain the movable jaw in position. This nested configuration protects the spring from damage while preserving its retention function.
2Ease of operation
If the spring is exposed between the stationary and movable jaws, then it can compress the movable jaw, but the exposed portion is apt to be contaminated by oil and debris
Solution Approach 1:
The spring is enclosed within the hollow guide, which acts as a protective housing. This nesting prevents oil and debris from contacting the spring directly, eliminating contamination while allowing the spring to compress the movable jaw through the guide structure.
Solution Approach 2:
The hollow guide serves as an intermediary structure between the spring and the external environment. It transmits the compression force from the spring to the movable jaw while shielding the spring from contamination by oil and debris.
3Reliability
If holes and recesses are formed in the sliding groove for mounting the spring, then the spring can be secured, but the structural strength of the wrench is reduced
Solution Approach 1:
The hollow guide is nested within the sliding groove, providing a complete enclosure for the spring without requiring any holes or recesses in the sliding groove itself. This maintains the full structural integrity of the sliding groove while securely housing the spring.
Solution Approach 2:
The hollow guide serves multiple functions: it houses and secures the spring, prevents contamination, provides external support to the spring, and maintains the structural strength of the sliding groove by eliminating the need for holes or recesses.
4Ease of operation
If the movable jaw is allowed to slide freely, then it can move smoothly, but it is liable to disengage from the guide due to impact
Solution Approach 1:
The hollow guide is nested within the sliding groove, creating a complete enclosure that prevents the movable jaw from disengaging during impact while still allowing smooth sliding movement within the confined space.
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 ensures stable and efficient high-torque operation by distributing reactive forces effectively and preventing stress concentration, maintaining structural integrity and reducing manufacturing costs.
Implementation Method 1
an elastic element has two ends respectively abutting the guide and the second face of the spring seat for biasing the slide to the initial position
Data Source
AI summary
An open end wrench includes first and second jaws. The first jaw includes an arcuate sliding groove having an arcuate sliding wall. A slide is received in the sliding groove and includes an arcuate sliding face slideable along the sliding wall. An arcuate guiding slot is formed in the slide. A guide is fixed in the sliding groove and received in the guiding slot. The guiding slot includes an abutting end and a pressing end. The abutting end is in contact with the guide when the slide is in an initial position. A spring seat is mounted in the pressing end of the guiding slot. The spring seat includes a face pressing against the pressing end. An elastic element has two ends respectively abutting the guide and the other face of the spring seat for biasing the slide to the initial position.