Circular Saw Base Clamping With Leaf Spring Position Retention
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Solution Overview
Problem
Conventional circular saws face issues with the loose engagement between the sub-base and base pedestal, leading to potential position changes of attached auxiliary members like guides or right-angled rulers during operation.
Innovation Solution
A power tool design featuring a base pedestal with a pressing mechanism that includes a main pressing part and an auxiliary pressing part, such as a leaf spring, which applies a variable pressing force to auxiliary members, ensuring secure attachment and minimizing positional changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the engagement between the bar of the sub-base and the base pedestal is made loose, then the sub-base can be smoothly attached to the base pedestal, but the position of the sub-base may change when a bolt is rotated after the sub-base is set to a desired position
Solution Approach 1:
The pressing mechanism applies pressing force to the auxiliary member before the bolt is fully tightened, preventing position changes during the fastening process. This preliminary action secures the auxiliary member at the desired position before final engagement.
Solution Approach 2:
The pressing mechanism acts as a cushioning element that compensates for the loose engagement between the bar and base pedestal. By providing continuous pressing force, it prevents position changes that would otherwise occur during bolt rotation and tightening.
2Manufacturing precision
If a pressing mechanism is added to securely fix the auxiliary member, then positioning accuracy is improved, but the device complexity increases
Solution Approach 1:
The pressing mechanism is integrated with the existing base pedestal structure. The pressing part is formed as an integral component of the base pedestal, and the pressing force is applied through the existing engagement structure, merging multiple functions into a unified design.
Solution Approach 2:
The pressing mechanism utilizes the natural engagement between the bar and base pedestal to generate pressing force. The loose engagement itself becomes part of the pressing mechanism, allowing the structure to serve dual purposes without requiring additional active components.
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 solution effectively fixes auxiliary members to the base pedestal, enhancing stability and accuracy by regulating movement and preventing deformation or damage, while facilitating easy attachment and detachment.
Implementation Method 1
the auxiliary pressing part may be a leaf spring which is provided to face the insertion part and is elastically deformed by the extension part inserted into the insertion part
Implementation Method 2
The power tool may further include a coil spring which is provided around a shaft part of the bolt, and the coil spring may regulate a movement of the auxiliary pressing part in a direction away from the auxiliary member
Data Source
AI summary
Provided is a power tool capable of suitably fixing an auxiliary member to a base pedestal. The power tool has a base having a sliding surface capable of sliding on a workpiece, and an auxiliary member that is attachable to the base and has a guiding surface. The power tool also has a wing bolt and a leaf spring as a pressing mechanism capable of pressing an extension part of the auxiliary member. An operator can change a pressing force of the wing bolt to the auxiliary member by changing the position of the wing bolt in a pressing direction. The leaf spring applies a predetermined pressing force to the auxiliary member even in the absence of the pressing force of the wing bolt to the auxiliary member.