Hand Tool Drive Interface for Orbital and Oscillating Motion

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Solution Overview

Problem

Existing hand-held devices are limited by their ability to perform only one type of tool movement, making them unsuitable for diverse tasks without adapting the tool movement to the specific requirements of different activities.

Innovation Solution

A hand-held device with a drive part that allows for the detachable connection of various tools, featuring different types of movement, including orbital, oscillating, and rotary movements, facilitated by eccentric or central bearings and interlocking mechanisms, enabling secure and adaptable tool attachment without manual handling.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a hand-held device is designed for a specific tool movement (e.g., pure rotational movement), then the tool can be optimized for that specific activity, but the device cannot perform other types of movements required for different work steps

Engineering Contradiction:

Improveability to perform different types of tool movementVSAvoidcomplexity of drive means and tool connection mechanism

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The drive means is designed with a universal interface that can accommodate multiple types of tools requiring different movements (rotational, oscillating, orbital). The drive part includes a drive means with a connection interface that can releasably connect to various tools, each with different bearing arrangements, allowing a single device to perform multiple functions without requiring separate specialized devices for each tool movement type

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Ease of operation

If various tools are detachably connected to the drive means, then the device can be equipped for different activities, but manual handling and connection of tools increases operation time and risk of contamination

Engineering Contradiction:

Improveease of tool connection and disconnectionVSAvoidtime required for tool connection and disconnection

Core Design Contradiction:

Ease of operationVSLoss of time

Solution Approach 1:

The connection mechanism is designed to enable automatic or self-service tool attachment and detachment. The drive means includes a connection interface with latching elements that can automatically engage with corresponding features on the tool, allowing tools to be connected and disconnected quickly without complex manual handling procedures, reducing both operation time and contamination risk

Inventive Principle:

Principle #25Self-service

3Adaptability or versatility

If tools are connected to an eccentrically mounted drive means, then orbital and oscillating movements can be achieved, but secure attachment under centrifugal forces becomes more difficult

Engineering Contradiction:

Improveability to produce orbital and oscillating movementsVSAvoidsecure attachment of tool under centrifugal forces

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The connection interface incorporates asymmetric latching elements and bearing arrangements that provide secure attachment specifically optimized for eccentric and orbital movements. The latching mechanism includes features that engage more strongly in the direction of centrifugal forces generated during eccentric rotation, ensuring reliable tool attachment even when the tool is subjected to varying centrifugal loads during orbital or oscillating operation

Inventive Principle:

Principle #4Asymmetry

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

Enables efficient operation with multiple tools, ensuring the optimal type of movement for each task, reducing contamination and improving handling by allowing tools to be easily connected and disconnected, and providing secure attachment even under centrifugal forces.

Implementation Method 1

the drive means is eccentrically mounted in the drive part with an eccentricity

Methodology Applied

Scientific EffectEccentric mounting: Eccentric

Implementation Method 2

a fixed bearing on the housing distanced from the drive means for cooperation is arranged with a tool

Methodology Applied

Scientific EffectMechanical constraint through bearing cooperation:

Data Source

PatentEP1983880B1Hand-operated device and tools which can be connected to it

Publication Date: 2009.07.08 GOOD VIBRATIONS FIT DURCH SCHWINGUNG E K INH VOLKER HALTER

Figure 1~1A
Figure 2~3A
Figure 4

AI summary

The invention relates to a hand-operated device (1), comprising a housing (2) and a drive part (3) with a drive means (5) which can be moved relative to the housing (2) by means of a motor (7), and comprising a tool (4) which can be detachably connected to the drive means (5). In order to be able to use the device (1) universally by virtue of fitting various tools (4, 4', 4'', 4''') and in each case providing a different type of movement of the latter, the invention makes provision for the drive means (5) to be eccentrically mounted in the drive part (3) with an eccentricity (e) and for a fixing mount (13) for possible interaction with a tool (4, 4''') to be arranged on the housing (2) at a distance from the drive means (5).