Chainsaw Battery Mount Layout for Easier Rear Removal
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Solution Overview
Problem
Conventional electric chain saws face difficulties in easily removing the battery from the battery attachment part during charging, which can lead to increased complexity and potential strain on the device.
Innovation Solution
The electric power work device incorporates a battery removal mechanism that allows the battery to be easily detached by pushing the rear part of the top handle down, reducing the load on the body case and utilizing a protrusion on the bottom surface to stabilize the device, enabling upward removal of the battery from the attachment part.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the battery is made larger to increase power supply capacity, then the power supply capability is improved, but the battery becomes difficult to remove from the battery attachment part
Solution Approach 1:
The patent changes the removal direction from horizontal to vertical by positioning the battery attachment part at the rear of the top handle. The battery is configured to protrude downward from the bottom surface, allowing upward removal motion that leverages the handle's positioning rather than requiring direct manual extraction from a side-mounted attachment part.
Solution Approach 2:
The top handle serves as an intermediary element between the user and the battery removal action. By positioning the battery attachment part at the rear of the top handle, the handle itself becomes part of the removal mechanism, where pushing the handle downward facilitates battery upward movement through the structured interaction between handle, attachment part, and battery position.
2Quantity of substance
If the battery attachment part is positioned to accommodate a larger battery, then the power supply capability is improved, but the device becomes unstable when placed on a surface
Solution Approach 1:
The patent repositions the battery attachment part from a side or top position to the rear of the top handle, with the battery configured to protrude downward from the bottom surface. This vertical arrangement at the rear creates a stable triangular support base when the device is placed on a surface, with the protruding battery lower end and body case forming stable contact points that prevent tipping.
Solution Approach 2:
The patent creates different functional zones: the protruding lower end of the battery serves as a forward support point, the body case provides main structural support, and the rear positioning of the attachment part creates a stable rear anchor. This local differentiation of support functions throughout the device structure achieves overall stability despite the larger battery size.
3Ease of operation
If the battery is positioned behind the top handle for easy removal, then the battery removal ease is improved, but the load on the body case increases
Solution Approach 1:
The top handle acts as a mechanical intermediary that distributes and manages the load during battery removal. When the user pushes the top handle downward to remove the battery, the handle's structure at the rear of the body case provides a lever arm that reduces the direct force transmitted to the body case, making the removal process easier while protecting the body case from excessive load.
Data Source
AI summary
An electric power work device simplifies a mechanism of a battery attachment part and easily removes a battery from the battery attachment part. A chain saw includes a body case, a cutting part (a work tool), and the battery. A battery removal mechanism for removing the battery is provided on a rear part of the body case. The battery removal mechanism includes a lower end of the battery and a bottom surface of the body case. The lower end of the battery protrudes downward from the bottom surface of the body case, and a frontmost end of a lower part of the battery is disposed in front of a rear end of a lower part of a top handle. Another battery removal mechanism includes a protrusion on the bottom surface of the body case and in front of the lower end of the battery.