Sander Balancer Mechanism for Battery Weight Compensation
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Solution Overview
Problem
Sanders powered by battery packs become unbalanced due to the high-power, heavy battery pack, which shifts the center of gravity and makes them prone to tipping over and difficult to control.
Innovation Solution
A balancer is integrated between the housing and sanding plate, featuring a balance element that counteracts the weight of the battery pack, maintaining balance and stability by adjusting the center of gravity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a high-power battery pack is used to provide sufficient power for the sander, then the power is improved, but the center of gravity shifts to the rear making the sander unbalanced and prone to tipping over
Solution Approach 1:
A balance element is added to the balancer assembly to counteract the weight of the battery pack. The balance element has a specific weight and position designed to offset the rearward shift in center of gravity caused by the heavy battery pack, thereby restoring balance to the sander while maintaining the high-power battery pack for sufficient motor power
2Device complexity
If a heavy battery pack is mounted at the rear to maintain compact structure, then the sander remains compact and easy to control, but the center of gravity moves closer to the rear causing the sander to flip over backwards
Solution Approach 1:
The balance element in the balancer assembly serves as a counterweight to the heavy battery pack. By positioning the balance element in the front part of the sander with appropriate weight, it compensates for the rearward center of gravity shift, preventing the sander from tipping backward while preserving the compact rear-mounted battery configuration
Solution Approach 2:
The balancing solution addresses the horizontal center of gravity issue by introducing a vertical dimension through the balancer assembly that extends between the housing and sanding plate. This multi-dimensional approach allows weight distribution to be adjusted in both horizontal and vertical planes to achieve stable operation
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 balancer ensures the sander remains balanced, allowing for effective and controlled operation without compromising power, enabling efficient sanding tasks.
Implementation Method 1
the balance element is balanced with the battery pack, which solves the balance problem in the prior art while allowing the battery pack to satisfy the desired power requirements of the sander
Data Source
AI summary
A sander according to the present invention comprising a housing, a motor and a transmission mounted within the housing, a sanding plate mounted below the housing, a battery pack mounted at the rear end of the housing and a balancer mounted on either the housing or the sanding plate. The balancer includes a balance element disposed in the front part of the sander. The balance element is balanced with the battery pack, which solves the balance problem of the DC sanders known in the prior art while still providing a battery pack that can satisfy the power requirements of the sander.