Battery Pack and Lubricant Tank Layout in Hand-Held Machining Tools

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Solution Overview

Problem

Existing hand-held battery-operated electric machining devices lack improved properties such as efficient battery management, tool attachment mechanisms, and lubricant storage, which hinder their performance and usability.

Innovation Solution

A hand-held battery-operated electric machining device with a standing portion for stable contact, a receiving device for exchangeable battery packs, a housing portion for tool attachment, and a tank for lubricant storage, optimized for space utilization and user convenience.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If the electric machining device is designed with a compact structure for hand-held operation, then portability and ease of operation are improved, but space for battery pack, lubricant storage, and tool attachment is limited

Engineering Contradiction:
Improvehand-held operationVSAvoidinternal space
Core Design Contradiction:
Ease of operationVSVolume of moving object

Solution Approach 1:

The receiving device for the battery pack is arranged to at least partially overlap with the tank for lubricant storage when viewed from above, creating a nested spatial relationship that maximizes internal space utilization while maintaining compact external dimensions for hand-held operation

Inventive Principle:
Principle #7Nested doll (Nesting)

Solution Approach 2:

The receiving device extends in a receiving direction that is substantially perpendicular to the longitudinal extension direction of the device, utilizing the vertical dimension and transverse space rather than only longitudinal space, thereby efficiently using available internal volume without increasing overall device length

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

2Volume of moving object

If the receiving device and tank are arranged to overlap at right angles to the longitudinal extension direction, then space utilization is improved, but device complexity increases

Engineering Contradiction:
Improvespace utilizationVSAvoidarrangement complexity
Core Design Contradiction:
Volume of moving objectVSDevice complexity

Solution Approach 1:

The device is segmented into distinct functional modules: a standing portion for stable placement, a housing portion for tool attachment, a receiving device for battery packs, and a tank for lubricant storage. This modular segmentation allows each component to be independently designed and positioned, simplifying the overall arrangement while achieving efficient space utilization through the perpendicular overlapping configuration

Inventive Principle:
Principle #1Segmentation

3Ease of manufacture

If the narrow sides of the receiving space extend parallel to the housing portion facing the tool, then packaging efficiency is improved, but accessibility for tool attachment may be reduced

Engineering Contradiction:
Improvepackaging efficiencyVSAvoidtool attachment accessibility
Core Design Contradiction:
Ease of manufactureVSEase of operation

Solution Approach 1:

The receiving space has an asymmetric cross-sectional configuration where the narrow sides extend parallel to the housing portion facing the tool, creating an optimized packaging arrangement. This asymmetric design allows the battery pack to be securely received while maintaining adequate clearance for tool attachment operations on the opposite side of the device

Inventive Principle:
Principle #4Asymmetry

Data Source

PatentUS20250170661A1Hand-Held Battery-Operated Electric Machining Device and Machining System
Publication Date: 2025.05.29 ANDREAS STIHL AG & CO KG
  • US20250170661A1 patent drawing
  • US20250170661A1 patent drawing
  • US20250170661A1 patent drawing

AI summary

A hand-held battery-operated electric machining device, includes: a standing plane and a standing portion, a receiving device, wherein the receiving device has a receiving space extending along a receiving direction of the receiving device and designed to be complimentary to the battery pack, a housing portion facing a tool, and a tank which delimits a tank interior of the electric machining device to store a lubricant. The receiving space has a cross-sectional area extending parallel to the standing plane. The cross-sectional area has two long sides extending along a longitudinal extension direction of the electric machining device and located substantially in parallel opposite one another, and two narrow sides extending at right angles to the longitudinal extension direction and located substantially in parallel opposite one another. The two narrow sides extend substantially parallel to the housing portion facing the tool, wherein viewed at right angles to the standing plane, the tank and the receiving device are arranged beside one another at right angles to the longitudinal extension direction.