Electric Hand Tool Battery Receiving Module Design
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Solution Overview
Problem
Existing electric hand-held power tools face challenges in adapting to customer-specific battery supply requirements without incurring additional costs and assembly complexities, particularly when dealing with different voltage and capacity battery packs, which can affect safety and tool longevity.
Innovation Solution
An electric hand tool design featuring a housing with a receiving section for integral battery pack attachment and a separately designed receiving module that provides a specific fastening contour for mechanical and electrical connection, allowing for adaptation to various battery packs and additional functionalities like data transmission, without being easily detachable by users.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a single receiving section is provided in the housing for battery pack attachment, then manufacturing costs and assembly complexity are reduced, but adaptability to different battery pack configurations (single or dual packs, different voltages) is limited
Solution Approach 1:
The battery receiving system is divided into two independent receiving sections (first and second receiving sections) within the single housing. Each receiving section can independently accommodate a battery pack, allowing the system to support single battery pack mode (using one section) or dual battery pack mode (using both sections). This segmentation enables manufacturing cost reduction through standardized housing while maintaining adaptability through configurable battery arrangements.
2Adaptability or versatility
If separate adapters are provided for different battery configurations, then adaptability to various battery packs is improved, but device complexity and risk of loss or misuse increase
Solution Approach 1:
Multiple receiving sections for different battery configurations are merged into a single integrated housing structure. The first and second receiving sections are both built-in to the same housing, eliminating the need for separate external adapters. This merging approach maintains battery pack compatibility while reducing device complexity by integrating all receiving functions directly into the power tool housing.
Solution Approach 2:
The housing is designed with universal multi-functionality to accommodate different battery pack configurations. The same housing can receive either a single battery pack in one receiving section or multiple battery packs across both receiving sections, supporting various voltage configurations (e.g., 18V, 36V, 54V) without requiring different housing types or additional adapters.
3Power
If users can freely attach multiple high-output battery packs via adapters, then power output is increased, but safety risks and tool longevity are compromised
Solution Approach 1:
The system prevents harmful over-power configurations through preliminary design constraints. By providing exactly two receiving sections with specific mechanical and electrical connection designs, the system inherently limits the maximum battery configuration to two packs. This preliminary anti-action prevents users from attaching excessive high-output battery packs that could compromise safety, while still allowing sufficient power output through the supported dual-pack configuration.
Data Source
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AI summary
The present invention relates to an electric hand tool (10) comprising a housing (12) with at least two housing parts (12a, 12b, 12c, 12d) in which at least partially a drive unit for driving a tool spindle of the electric hand tool (10) is received, a receiving section (20) which is designed for the detachable receiving of a battery pack (A), wherein the receiving section (20) is integrally formed with at least one housing part (12c, 12d).Furthermore, the electric hand tool (10) is characterized by the fact that it comprises a receiving module (30) designed separately from the housing (12) with at least one receiving device (32), each designed for the detachable receiving of a battery pack (A) and capable of electrically connecting a received battery pack (A) to the drive unit, wherein the receiving module (30) is indistinguishably electrically connected to the drive unit and mechanically connected to the housing (12) for the user in the mounted state.