Ratchet Wrench Angle Adjustment via Engaging Member Disengagement
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Solution Overview
Problem
Conventional ratchet wrenches with angle adjusting mechanisms face issues with incomplete gear engagement and disengagement, leading to difficulty in rotational movement and complex assembly due to multiple parts.
Innovation Solution
A ratchet wrench design featuring a handle, driving head, engaging member, spring, and controlling knob, where the engaging member is biased by the spring to engage or disengage with the driving head's teeth through a guiding cutout and abutting block mechanism, allowing smooth angle adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a gear with two different size diameters is used in the conventional ratchet wrench, then the angle adjusting mechanism can be implemented, but the gear may not be completely engaged with and disengaged from the teeth of the driving head, leading to difficulty in rotational movement
Solution Approach 1:
The engaging member is divided into distinct functional segments: an engaging tooth for meshing with the driving head teeth, a guiding cutout for positional control, and a receiving groove for the button. This segmentation allows each component to perform its specific function optimally, ensuring complete engagement and disengagement while maintaining angle adjusting capability.
Solution Approach 2:
Instead of using a gear that may slip or partially engage, the patent inverts the approach by using a button that directly actuates the engaging member. The button's linear motion along the longitudinal hole provides direct control over the engaging tooth's position, ensuring complete disengagement for smooth rotational movement while maintaining the angle adjusting function.
2Adaptability or versatility
If multiple parts and elements are used in the conventional ratchet wrench, then the angle adjusting mechanism can be implemented, but the assembly becomes complex and not easily assembled
Solution Approach 1:
The engaging member combines multiple functions into a single component: it has the engaging tooth for mechanical connection, the guiding cutout for positional guidance, and the receiving groove for button engagement. This merging reduces the number of separate parts while maintaining the angle adjusting capability, making the assembly simpler and more efficient.
Solution Approach 2:
The engaging member serves multiple purposes simultaneously: it engages with the driving head teeth to transmit force, guides the button's movement through the longitudinal hole, and provides a receiving groove for the button to rest in. This multi-functionality reduces the overall complexity of the mechanism while achieving the angle adjusting objective.
3Ease of operation
If the button is depressed to disengage the gear, then the wrench head and handle can rotate, but the gear may not be completely disengaged, leading to difficulty in rotational movement
Solution Approach 1:
The button is designed with a preliminary action sequence: when depressed, it first moves along the longitudinal hole to push the engaging member away from the driving head teeth, ensuring complete disengagement before allowing rotational movement. This preliminary linear motion of the button guarantees reliable disengagement and smooth rotation.
Solution Approach 2:
The engaging member acts as an intermediary between the button and the driving head. When the button moves, it transfers this motion to the engaging member, which then completely disengages from the driving head teeth. This intermediary mechanism ensures complete disengagement and reliable rotational movement.
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
Enhances rotational ease and simplifies assembly by ensuring complete engagement and disengagement of the driving head, facilitating precise angle adjustments with reduced parts complexity.
Implementation Method 1
The spring is interposed between a bottom of the longitudinal hole of the handle and the engaging member, and configured to bias the engaging member toward the driving head
Implementation Method 2
the abutting block is substantially oblong in shape such that rotational movement of the controlling knob drives the engaging member to be disengaged from the driving head
Data Source
AI summary
A ratchet wrench includes a handle, a driving head, an engaging member, a spring and a controlling knob. The handle has a receiving groove, a transverse hole in one lateral side of the handle, and a longitudinal hole in a bottom of the receiving groove. The driving head has a connecting portion pivotally connected to the handle. The engaging member is movably received in the longitudinal hole, and has a guiding cutout in a lateral side thereof. The spring is interposed between a bottom of the longitudinal hole and the engaging member. The controlling knob has an abutting block received in the guiding cutout of the engaging member. The abutting block is substantially oblong in shape such that rotational movement of the controlling knob drives the engaging member to be disengaged from the driving head.