Engaging Washer Teeth Layout for Bolt Reaction Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing bolt tightening systems require users to apply manual forces to handle reaction forces, which can lead to user fatigue and inefficiency, as the opposing head may spin during tightening, necessitating additional tools like reaction washers and backup washers to manage these forces effectively.
Innovation Solution
The design of engaging washers with specific features such as inner and outer rows of teeth, bridges, and castles that interact with a reaction socket and flange to resist rotation and manage reaction forces, allowing for improved engagement and resistance during bolt tightening operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If users manually apply forces to the power tool to handle reaction forces, then the tightening operation can be performed, but user fatigue increases and efficiency decreases
Solution Approach 1:
The reaction washer acts as an intermediary component between the power tool and the workpiece. It transfers reaction forces from the tightening head to the flange through its teeth engagement, eliminating the need for users to manually counteract reaction forces while maintaining effective tightening operation
2Stability of the object's composition
If the opposing head is held in place with a hand wrench, then rotation of the opposing head is prevented, but additional tools and complexity are required
Solution Approach 1:
The backup washer serves as an intermediary between the opposing head and the flange. Its teeth engage with the flange to prevent rotation of the opposing head, eliminating the need for a separate hand wrench while maintaining rotational stability during tightening
Solution Approach 2:
The engaging washer system performs multiple functions: reaction washers handle reaction forces from the tightening head, backup washers prevent opposing head rotation, and both work together to enable automated tightening without additional manual tools or equipment
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 engaging washer system effectively reduces user effort by managing reaction forces and preventing the opposing head from spinning, enhancing the efficiency and stability of the bolt tightening process.
Implementation Method 1
The inner row of teeth can include teeth that are angled in a first circumferential direction as they extend in the flange direction away from the body of the engaging washer. The outer row of teeth can include teeth that are angled in a second circumferential direction as they extend in the flange direction away from the body of the engaging washer.
Data Source
AI summary
Engaging washers such as reaction washers and backup washers can include novel advantageous features. For example, an engaging washer can include an inner row of teeth and an outer row of teeth, where the teeth in the inner row can slope in a first circumferential direction to primarily engage a flange during bolt tightening, and the teeth in the outer row can slope in a second circumferential direction to primarily engage during bolt loosening. The engaging washers may also include an arched design to allow gradual increasing of contact surface areas as a clamping force in the washer gradually increases. Additionally, a reaction washer can include stepped castles for engaging a reaction socket. The castles may also include sloped or curved engaging surfaces that can provide decreased contact surface area and may also inhibit outward biasing of reaction fingers that are engaging the castles.