Pivoting Grinding Head and Suction Hose Layout for Wall Guidance
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Solution Overview
Problem
Hand-held grinding machines with long handle bars are inconvenient for positioning the processing head relative to wall surfaces due to their design, making it difficult to guide the grinding head along wall surfaces effectively.
Innovation Solution
The hand-held machine tool features an elongated handle element with a pivotable and displaceable processing head, a suction hose arrangement protected by support arms, and a positioning spring arrangement that loads the processing head into a base position, allowing for easier handling and improved mobility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the handle bar is made long to extend the working area, then the operator can reach distant wall surfaces, but the positioning of the processing head relative to the wall surface becomes difficult
Solution Approach 1:
The processing head is made movable relative to the handle element through a joint arrangement allowing pivoting and displacement. This dynamic configuration enables the processing head to adapt its position and orientation to reach distant wall surfaces while maintaining ease of positioning through controlled movement rather than fixed long-distance reach.
Solution Approach 2:
The machine tool is divided into separable components: the handle element and the processing head connected via a joint arrangement. This segmentation allows independent positioning of the processing head relative to the handle element, enabling the operator to maintain a comfortable grip position while extending the processing reach to distant surfaces.
2Productivity
If the suction hose is arranged on the front free end region of the processing head, then it can effectively collect dust and chips, but it becomes vulnerable to damage
Solution Approach 1:
Support arms are introduced as intermediary protective structures between the suction hose and the external environment. These support arms shield the suction hose from mechanical damage while allowing it to maintain its position for effective dust and chip collection. The support arms act as a protective barrier that preserves both the functionality and durability of the suction hose.
3Ease of operation
If the processing head is made movable relative to the handle element, then handling and positioning become easier, but the suction hose may be damaged due to movement
Solution Approach 1:
The joint arrangement is designed with protective features that anticipate and prevent suction hose damage during processing head movement. The support arms and structural design provide beforehand protection, allowing the processing head to move freely for easy handling while the suction hose remains shielded from mechanical stress and damage throughout the range of motion.
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 enhances the operator's ability to conveniently position and guide the processing head along wall surfaces, reducing the risk of damage to the suction hose and improving the overall handling and mobility of the machine tool.
Implementation Method 1
a suction hose (26) arranged between the articulation area (46) and the front end (11B) of the processing head (11), for removing dust and chips generated by the processing tool (20)
Implementation Method 2
a positioning spring arrangement (70) which acts on the processing head (11) with respect to a first pivot axis (S1)
Data Source
Figure 1~2
Figure 3~15
Figure 6~7
AI summary
The invention relates to a hand-held machine tool (10) having a, in particular rod-shaped, handle element (12) for an operator to grasp and having a machining head (11), which is movably mounted on the handle element (12) by means of a joint assembly (13) and which has an electric drive motor (100) for driving a tool holder (19) for holding a machining tool (20), wherein a bottom side of the handle element (12) and a machining side of the machining head (11) face a workpiece (W) in a base position of the machining head (11), wherein the joint assembly (13) is connected to the machining head (11) in an articulated-connection region of the machining head (11), wherein a flexible suction hose for conducting a suction flow from the machining head (11) to the handle element (12) extends between the handle element (12) and the machining head (11), which suction hose is fastened to an end region of the handle element (12) by means of a first hose end and to a suction connection (23) of the machining head (11) by means of a second hose end. According to the invention, the suction connection (23) is arranged between the end region of the handle element (12) and the articulated-connection region of the machining head (11) in the base position.