Hand-Held Grinding Machine Pivoting Tool Head and Suction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing hand-held grinding machines face challenges in providing efficient and fatigue-free grinding operations due to inadequate suction systems for uniform abrasion removal and ergonomic design for comfortable handling.
Innovation Solution
The hand-held grinding machine incorporates a suction device with an annular or ring-shaped suction channel section that surrounds the coupling device for the transmission shaft, connected to a planetary gear system, and a pivoting tool head with a hood device featuring a cylindrical recess and sealing brush for efficient abrasion collection and removal, along with an ergonomic design that balances the weight distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a conventional suction channel is used, then the structure is simple, but the abrasion removal is not uniform
Solution Approach 1:
The suction channel is divided into multiple sections (first suction channel section, second suction channel section, third suction channel section) with different geometries and orientations. Each section targets specific areas around the tool holder to achieve uniform abrasion removal from all directions, resolving the contradiction between structural simplicity and uniformity of abrasion removal.
2Adaptability or versatility
If the tool head is fixed, then the structure is simple, but the grinding accessibility is limited
Solution Approach 1:
The tool head is designed to pivot relative to the tubular rod about a pivot axis, transforming from a fixed structure to a dynamic one. This allows the tool head to be positioned at various angles and orientations, enabling grinding access to difficult-to-reach areas while maintaining a relatively simple overall structure.
Solution Approach 2:
The hood device features an asymmetric design with a recess on one side, allowing the tool head to be positioned at optimal angles for different grinding applications. This asymmetric configuration enhances versatility and accessibility without requiring complete redesign of the entire tool head structure.
3Ease of operation
If the weight is concentrated, then the structure is compact, but the user fatigue increases
Solution Approach 1:
The drive motor is positioned with its axis of rotation offset from the longitudinal axis of the tubular rod, creating a counterbalancing effect. This offset positioning acts as a counterweight mechanism that distributes the mass more evenly along the tool, reducing torque and vibration during operation, thereby decreasing user fatigue while maintaining a compact overall structure.
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 configuration enables uniform and efficient abrasion removal, reduces user fatigue through balanced weight distribution, and allows for precise grinding on edges and large areas with improved ergonomics.
Implementation Method 1
a suction device which comprises a suction channel which has a suction channel section which is essentially annular or has the shape of a section of a ring
Implementation Method 2
the tool holder and an end of the transmission shaft facing the tool holder are connected to one another by means of a planetary gear
Data Source
Figure 1
Figure 2
Figure 3
AI summary
To provide a hand-held grinding machine, comprising a holding device for holding the grinding machine, comprising a drive motor and comprising a tool head, wherein the holding device comprises a substantially tubular bar with a proximal end and a distal end, wherein the drive motor is arranged at the proximal end, wherein the tool head is arranged at the distal end, wherein the grinding machine comprises a transmission shaft which connects the drive motor to a tool holder of the tool head for the transmission of torque and which runs at least in sections within the tubular bar, wherein the tool head comprises a cowl apparatus for covering the tool holder, wherein the cowl apparatus comprises a cowl element which comprises a substantially cylindrical cowl chamber, wherein the tool holder together with a tool arranged thereon can be arranged at least in sections in the cowl chamber, which hand-held grinding machine permits simple, efficient and as far as possible fatigue-free grinding, it is proposed that the cowl element comprises a cylinder-segment-shaped recess, such that a tangent to an edge of the tool that is arranged in the tool holder runs substantially in a plane that bounds the cylindrical-segment-shaped recess.