Striking Tool Motor Orientation for Battery Space and Balance
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Solution Overview
Problem
The challenge lies in rationalizing the component disposition and operability of large striking tools, such as hammers, which require high energy capacity and large battery sizes, while maintaining ergonomic design and reducing environmental impact, especially in the context of recent ESG and SDG initiatives.
Innovation Solution
The design incorporates an elongated main housing with a tool holder and pair of handles, a drive mechanism, and a motor output shaft positioned to optimize space, allowing the battery mounting portion to be placed on the side, securing expanded space for the battery and improving weight balance, with features like slide guide members and elastic members for vibration reduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the battery size is increased to provide higher energy capacity for large output requirements, then the energy capacity is improved, but the tool size and weight increase
Solution Approach 1:
The motor output shaft is reoriented to extend in the thickness direction (third direction) rather than the longitudinal direction (first direction). This dimensional change allows the battery to be mounted in the width direction (second direction), effectively utilizing three-dimensional space and accommodating larger battery capacity without increasing the tool's longitudinal size.
2Use of energy by moving object
If the battery size is increased to provide higher energy capacity, then the energy capacity is improved, but the weight balance deteriorates
Solution Approach 1:
By changing the motor output shaft orientation to the thickness direction, the battery can be positioned in the width direction closer to the tool's central axis. This spatial reconfiguration improves weight distribution and balance, preventing the tool from becoming top-heavy or unbalanced despite the increased battery weight.
3Device complexity
If the motor output shaft is oriented in the longitudinal direction, then the drive mechanism is simplified, but the battery mounting space is reduced
Solution Approach 1:
The motor output shaft extends in the thickness direction (third direction) perpendicular to both the longitudinal (first) and width (second) directions. This orientation creates expanded space in the width direction for battery mounting, effectively trading a slight increase in drive mechanism complexity for significant gains in battery accommodation space.
4Productivity
If the tool design is optimized for high output force, then the productivity is improved, but the ease of operation deteriorates due to increased weight and size
Solution Approach 1:
By reorienting the motor output shaft to the thickness direction, the battery can be positioned optimally in the width direction, improving weight balance and reducing the moment of couple. This reduces the operational burden on the user despite maintaining high output force capability, thereby improving ease of operation while preserving productivity.
Data Source
AI summary
A structuring technique contributes to the rationalization of dispositioning parts and operability with respect to a striking tool wherein usual operation is defined as a striking operation to the downward in a state that the striking tool is downwardly dropped by the own weight of the striking tool. A striking tool is held by a pair of handles by both hands while striking operation takes place when the striking tool drops downwardly by the own weight, a drive mechanism drives an end tool in a first direction and motor, wherein the output shaft of the motor extends in a third direction defined as a thickness direction to cross the first direction and the second direction, and a battery mounting portion is disposed at the side region of the main housing in the second direction, wherein a battery to supply electricity to the motor is mounted to the battery mounting portion.