Adjustable Wrench Head with Pivot and Positioning Assembly
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Solution Overview
Problem
Existing wrench designs are cumbersome and labor-intensive when adjusting the operating angle, especially in confined spaces, due to complex structures and inadequate positioning mechanisms.
Innovation Solution
A wrench with a handle, wrench head, and positioning assembly featuring a pivot part, positioning teeth, control bolts, and restoring springs, allowing for quick and precise adjustment of the operation angle by releasing clamping force with the control bolts to enable pivotal rotation of the wrench head.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a positioning rod and an adjustment rod are arranged in an inclined manner to adjust the wrench head angle, then the wrench head can be positioned, but the structure becomes complex and the operation becomes laborious
Solution Approach 1:
The positioning assembly is segmented into distinct functional components: a positioning member with positioning teeth for engagement, control bolts for actuation, and restoring springs for automatic resetting. This segmentation allows each component to perform its specific function efficiently while simplifying the overall structure compared to the inclined rod mechanism.
Solution Approach 2:
Instead of using inclined rods that require complex coordinated movement, the invention uses a vertical positioning member that moves axially within a hole, combined with control bolts that press against abutting members. This inverted approach simplifies the adjustment mechanism by separating the positioning function from the actuation function.
2Reliability
If a positioning rod and an adjustment rod are arranged in an inclined manner to adjust the wrench head angle, then the wrench head can be positioned, but the operation becomes laborious
Solution Approach 1:
The restoring springs automatically reset the control bolts to their initial positions after the wrench head angle is adjusted. This self-service mechanism eliminates the need for the user to manually reset the adjustment mechanism, significantly reducing operational effort and improving ease of use while maintaining reliable positioning.
3Ease of operation
If the positioning member is made movable by pressing control bolts to release clamping force, then the wrench head can be rotated to adjust the operation angle, but the structure requires additional components
Solution Approach 1:
The control bolts and restoring springs are integrated into a unified adjustment mechanism where the control bolts actuate the positioning member and the restoring springs automatically reset them. This merging of actuation and resetting functions into a compact assembly achieves quick adjustment without requiring separate complex mechanisms for each function.
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 enhances operational convenience and speed, providing a more labor-saving and effective method for adjusting the wrench head's angle, improving positioning and reducing operational complexity.
Implementation Method 1
The two restoring springs are disposed inside the radial hole of the handle and abutted against the control bolts respectively for resetting the control bolts
Data Source
AI summary
A wrench includes a handle having a notch, a radial hole, and an axial hole communicated with the notch and the radial hole, a wrench head pivotally connected with the notch by a pivot part on which a first positioning teeth part is provided, and a positioning assembly including a positioning member disposed inside the axial hole, and two control bolts disposed inside the radial hole. The positioning member has two first abutting members and a second positioning teeth part engaged with the first positioning teeth part. Each control bolt has a second abutting member abutted against one of the first abutting members of the positioning member. By such arrangements, when both of the two control bolts are pressed, the positioning of the wrench head by the positioning member can be released for facilitating adjustment of the operation angle of the wrench head.