Router Battery Layout for Lower Tilting Moment and Better Balance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing hand-held power tools, such as routers and trimmers, suffer from an unfavorable center of gravity and weight distribution due to the placement of the battery pack above the drive motor, leading to increased tilting moments and difficulty in precise, fatigue-free operation.
Innovation Solution
The battery pack is positioned in a first machine section, the drive motor in a second section, and the handle in a third section, arranged along a transverse axis angled to the output shaft, with a horizontal alignment of these components to reduce the center of gravity and improve weight distribution, allowing for more precise and ergonomic one-handed operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the battery pack is placed above the drive motor in a conventional vertical arrangement, then the power tool achieves a compact design, but the center of gravity becomes unfavorably high and tilting moments increase
Solution Approach 1:
The patent transitions from a conventional vertical arrangement of components to a transverse arrangement where the battery pack, drive motor, and handle are positioned along a transverse axis extending perpendicular to the output shaft. This dimensional change in component layout redistributes mass laterally rather than vertically, lowering the center of gravity and reducing tilting moments while preserving compact overall dimensions.
Solution Approach 2:
Instead of placing the heavy battery pack above the drive motor as in conventional designs, the patent inverts this arrangement by positioning the battery pack laterally adjacent to the drive motor along the transverse axis. This inversion of the conventional vertical stacking approach achieves better weight distribution and ergonomics.
2Stability of the object's composition
If the battery pack is arranged centrally to the output shaft, then the power tool achieves a balanced structure, but the top weight increases and precision deteriorates
Solution Approach 1:
The patent redistributes components along a transverse axis perpendicular to the output shaft rather than arranging them concentrically around the output shaft. This spatial reconfiguration maintains structural balance while shifting mass distribution to reduce top weight and improve precision.
3Volume of moving object
If the machine sections are arranged vertically stacked, then the power tool achieves a compact form factor, but the center of gravity rises and fatigue increases
Solution Approach 1:
The patent arranges the battery pack, drive motor, and handle in a transverse sequence along an axis perpendicular to the output shaft, rather than stacking them vertically. This lateral arrangement maintains a compact form factor while distributing weight to lower the center of gravity, thereby reducing operator fatigue during extended use.
Data Source
AI summary
A hand-held power tool includes a machine housing, in which an electric drive motor is arranged that is paired with an output shaft for rotatably driving an insert tool, at least one battery pack, and a support device for guiding the machine housing on a workpiece. The support device has a support section, which has a foot plate for contacting the workpiece that includes a passage for the insert tool. The battery pack is arranged in a first machine section, the electric drive motor is arranged in a second machine section, and a handle for a user is arranged in a third machine section, at least in some sections. The three machine sections are arranged next to one another along a transverse axis, which is aligned at an angle to the output shaft of the drive motor.