Portable Machine Tool Pivotable Support Unit

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Solution Overview

Problem

Existing machine tool systems lack portability and versatility in machining workpieces, particularly in making precise and reliable cuts with a portable machine tool that can be easily transported and operated without a transport machine, while maintaining effective force and torque transmission.

Innovation Solution

A portable machine tool system with a machine tool housing, a coupling device, and a support unit that allows for relative movement between the support unit and the machine tool housing, featuring a drive unit, cutting strand, and guide unit forming a closed system, enabling precise and versatile machining with a lightweight, electrically operated plunge-cut saw or similar tool, capable of pivoting and adjusting to different angular positions.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Weight of moving object

If the machine tool is made portable and lightweight, then portability and ease of transport are improved, but force and torque transmission capability deteriorates

Engineering Contradiction:
Improvemachine tool weightVSAvoidforce and torque transmission
Core Design Contradiction:
Weight of moving objectVSForce

Solution Approach 1:

The support unit is designed to be pivotable relative to the machine tool housing, allowing dynamic adjustment of the cutting angle and position. This pivotable connection enables the portable machine tool to adapt to different workpiece geometries and cutting requirements while maintaining lightweight construction, resolving the contradiction between portability and machining versatility

Inventive Principle:
Principle #15Dynamics

2Stability of the object's composition

If the support unit is fixed to the machine tool housing, then structural stability is improved, but adaptability to different cutting angles and positions deteriorates

Engineering Contradiction:
Improvestructural stabilityVSAvoidadaptability to cutting angles
Core Design Contradiction:
Stability of the object's compositionVSAdaptability or versatility

Solution Approach 1:

The support unit is designed to be pivotable relative to the machine tool housing, allowing dynamic adjustment of the cutting angle and position. This pivotable connection enables the portable machine tool to adapt to different workpiece geometries and cutting requirements while maintaining structural stability during operation

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The locking device allows the operator to fix the support unit at different angular positions relative to the machine tool housing. By changing the angular parameter of the support unit, the system can adapt to various cutting angles and positions while maintaining stability when locked, resolving the contradiction between structural stability and adaptability

Inventive Principle:
Principle #35Parameter changes

3Manufacturing precision

If the cutting depth is not consistent, then machining precision deteriorates, but the complexity of maintaining constant cutting depth increases

Engineering Contradiction:
Improvecutting depth consistencyVSAvoidcutting depth control mechanism
Core Design Contradiction:
Manufacturing precisionVSDevice complexity

Solution Approach 1:

The patent includes a depth marking on the machine tool housing that indicates the cutting depth. This visual indicator allows the operator to easily set and maintain consistent cutting depth without complex control mechanisms, resolving the contradiction between machining precision and device complexity by using a simple visual reference system

Inventive Principle:
Principle #32Color changes

Data Source

PatentEP2681018B1Machine tool system
Publication Date: 2019.05.08 ROBERT BOSCH GMBH
  • EP2681018B1 patent drawingFigure 1~2
  • EP2681018B1 patent drawingFigure 3~4
  • EP2681018B1 patent drawingFigure 5~6

AI summary

The invention relates to a machine tool system having at least one machine tool separating device which has at least one cutting strand (18) and at least one guide unit (20) for guiding the cutting strand (18), which together form a self-contained system, and having at least one portable machine tool, which comprises a machine tool housing (12) and at least one coupling device (14) for coupling the machine tool separating device. According to the invention, the portable machine tool comprises at least one pad unit (22) to be placed on a workpiece, wherein the pad unit (22) and the machine tool housing (22) are mounted such that they can be moved relative to each other.