Pivot-Arm Battery Pack Layout for Stable Cordless Miter Saws
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing power tools with swivel arms for circular cross-cut and miter saws face challenges in efficiently arranging and securing energy storage units, leading to potential instability and limited user convenience due to suboptimal coupling unit placement and energy distribution.
Innovation Solution
The power tool design features coupling units on the swivel arm positioned parallel to their planes of main extent, allowing for series electrical connection of energy storage units, which are securely fastened and arranged to optimize space usage, weight distribution, and ease of handling, enabling a stable and convenient operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If coupling units are arranged perpendicular to the longitudinal axis of the swivel arm, then energy storage units can be fastened securely, but the arrangement occupies excessive space and compromises handling safety
Solution Approach 1:
The coupling units are reoriented from a perpendicular arrangement to a parallel arrangement relative to the longitudinal axis of the swivel arm. This dimensional reorientation allows the energy storage units to be mounted in a space-efficient configuration that extends along the length of the swivel arm rather than protruding outward, thereby reducing the overall volume occupied while maintaining secure fastening through the coupling surfaces
2Use of energy by moving object
If multiple energy storage units are arranged on the swivel arm, then energy supply is improved, but weight distribution becomes unbalanced affecting handling safety
Solution Approach 1:
The coupling units are positioned at specific locations along the longitudinal axis of the swivel arm with their coupling surfaces parallel to this axis. This localized arrangement allows the energy storage units to be distributed in a manner that optimizes both energy capacity and weight balance, with each coupling unit strategically placed to contribute to overall handling safety while providing sufficient energy supply
3Quantity of substance
If coupling units are positioned to maximize energy storage capacity, then energy supply is enhanced, but the arrangement complicates the structural design
Solution Approach 1:
The coupling units are designed with a universal mounting structure where the coupling surfaces parallel to the longitudinal axis serve multiple functions: securing energy storage units, distributing weight evenly, and maintaining structural simplicity. This multi-functional design allows maximum energy storage capacity to be achieved without complicating the overall structural design of the swivel arm assembly
Data Source
AI summary
A machine tool, in particular a chop saw and/or miter saw, includes (i) at least one pivot arm, (ii) at least one drive unit arranged on the pivot arm, (iii) at least two energy storage units, in particular battery packs, which can be electrically connected in series, for supplying energy to the drive unit, and (iv) at least two coupling units for fastening the energy storage units to the pivot arm. The coupling units are arranged on the pivot arm at an offset to one another with respect to a longitudinal axis of the pivot arm, the longitudinal axis of the pivot arm running at least substantially parallel to coupling surfaces, in particular main extension planes, of the coupling units.