Auxiliary Device Handling Section Decouples Tool Holder

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Solution Overview

Problem

Existing auxiliary devices for electrical work machines, such as percussion drilling machines and chipping hammers, experience undesirable contact and force transfer between the tool holder and the auxiliary device, leading to user discomfort, injury, and device damage due to direct impact loading and shock transfer during operation and handling.

Innovation Solution

The auxiliary device features a housing with a handle and a handling section that includes an opening allowing the tool holder to be freely accessible from the side, decoupling it from the collecting chamber, and a U-shaped arrangement of the handling section, handle, and attaching device to absorb and damp impacts, preventing force transfer and ensuring tool accessibility.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the auxiliary device is directly attached to the electrical work machine, then the auxiliary device can be securely mounted and function properly, but force transfer and impact loading occur between the tool holder and auxiliary device causing user discomfort and device damage

Engineering Contradiction:

Improvemounting securityVSAvoidforce transfer and impact loading

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The auxiliary device is divided into separate functional components: the handling section, base component, and attaching device. This segmentation allows the attaching device to provide secure mounting while the handling section absorbs impacts independently, preventing force transfer to the tool holder.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The handling section acts as an intermediary element between the attaching device and the base component. It decouples the tool holder from the auxiliary device housing, serving as a buffer that absorbs impacts and prevents direct force transfer while maintaining the functional connection.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Object-affected harmful factors

If the auxiliary device housing completely surrounds the tool holder, then dust protection is improved, but the tool holder becomes inaccessible and force transfer increases

Engineering Contradiction:

Improvedust protectionVSAvoidtool holder accessibility

Core Design Contradiction:

Object-affected harmful factorsVSEase of operation

Solution Approach 1:

The handling section is designed with localized openings at strategic positions, allowing tool holder accessibility from the sides while maintaining dust protection in other areas. This local modification provides both accessibility and protection without requiring complete enclosure.

Inventive Principle:

Principle #3Local quality

3Ease of manufacture

If the auxiliary device is mounted with the known mounting method, then the auxiliary device can be attached to the electrical work machine, but impact loading is transferred directly to the housing of the electrical work machine causing damage

Engineering Contradiction:

Improvemounting simplicityVSAvoidhousing durability

Core Design Contradiction:

Ease of manufactureVSStrength

Solution Approach 1:

The handling section is designed to absorb and damp impacts before they can be transmitted to the electrical work machine housing. This beforehand cushioning protects the housing from damage while maintaining simple mounting through the attaching device.

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

This design effectively decouples the tool holder from the auxiliary device, preventing adverse force transfer and impact absorption, enhancing user safety and device durability by allowing direct access to the tool and reducing shock transmission to the electrical work machine.

Implementation Method 1

a U-shaped arrangement of the handling section, handle, and attaching device to absorb and damp impacts, preventing force transfer

Methodology Applied

Scientific EffectImpact absorption: Damping

Data Source

PatentUS8636084B2Auxiliary device and a system composed of an electrical work machine comprising an auxiliary device

Publication Date: 2014.01.28 HILTI AG

AI summary

An auxiliary device for an electrical work machine is provided. The auxiliary device can be attached to the electrical work machine, and the electrical work machine can be equipped with a tool in a tool holder. The auxiliary device comprises a housing comprising a handle and an attaching device. The housing can be attached to the electrical work machine with the attaching device. The housing comprises a handling section, which is disposed next to the attaching device, and which comprises an opening, which allows at least the tool holder to be freely accessible from the sides. The handle is permanently connected to the handling section.