Power Tool Battery Mounting Mechanism for Vibration Resistance
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Solution Overview
Problem
Existing cordless hammer drills face challenges with the heavy battery pack, making the attachment and detachment operation cumbersome and prone to battery fall-off due to vibration, and require improved design for ergonomic handling and compact arrangement.
Innovation Solution
The power tool design features multiple battery mount parts aligned in the driving axis direction, allowing batteries to be slid perpendicularly for secure attachment, reducing the likelihood of fall-off, and arranging them to be easily accessible on one side for ergonomic handling, with an elastic member to prevent vibration-induced backlash.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the battery is made heavy to provide sufficient power, then the power output is improved, but the ease of operation deteriorates due to cumbersome attachment and detachment
Solution Approach 1:
The battery mounting mechanism is divided into separate components: a battery holder attached to the tool body, and a battery pack with engagement features. This segmentation allows the battery to be easily attached and detached while maintaining sufficient power capacity through proper battery selection.
2Power
If the battery is made heavy to provide sufficient power, then the power output is improved, but the battery becomes prone to fall-off due to vibration
Solution Approach 1:
The battery holder is pre-equipped with engagement features such as protrusions or clips that correspond to recesses in the battery pack. This preliminary preparation ensures that when the battery is attached, it automatically engages securely, preventing fall-off during vibration without requiring additional weight.
3Power
If multiple batteries are arranged to provide sufficient power, then the power output is improved, but the device complexity increases due to arrangement of battery mount parts
Solution Approach 1:
A single standardized battery holder design is created that can accommodate different battery types and configurations. This universal interface allows multiple batteries to be arranged in series or parallel configurations while using the same mounting mechanism, reducing overall device complexity.
4Ease of operation
If the battery mount parts are arranged for easy access, then the ease of operation is improved, but the tool configuration becomes less compact
Solution Approach 1:
The battery holder is positioned on the tool body in a location that provides easy access for the user, such as on the side or top surface, rather than at the bottom. This spatial repositioning in another dimension allows for easy battery changes while maintaining a compact overall tool configuration.
Data Source
AI summary
A power tool, such as a hammer drill (100), has first and second battery mount parts (160A, 160B) that are aligned in a longitudinal direction of the power tool. First and second batteries (170A, 170B) are mountable thereon in series along a straight line that extends in the longitudinal direction. The first battery (170A) is mounted on the first battery mount part (160A) by sliding along the straight line towards the second battery mount part (160B). The second battery (170B) is mounted on the second battery mount part (170B) by sliding along the straight line towards the first battery mount part (170A).