Elastic Press-on Element for Rotary Hammer Tool Fitting
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Solution Overview
Problem
Power tools, such as rotary hammers, experience damage due to 'blank tool percussions' where percussion energy is not transferred to the substrate, causing stress on tool fitting components.
Innovation Solution
Incorporating a press-on element made of elastic material that dampens vibrations from blank tool percussions, allowing effective vibration transmission and preventing unwanted rotation, with features like receiving regions, connecting elements, and spring devices to ensure secure locking and efficient energy transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a rigid tool fitting structure is used to ensure secure tool holding, then locking reliability is improved, but damage from blank tool percussions increases due to undamped vibrations
Solution Approach 1:
The press-on element is made of elastic material to provide flexibility and vibration damping while maintaining secure tool holding. This flexible component absorbs percussion vibrations without compromising the locking function.
Solution Approach 2:
The tool fitting uses a composite structure combining rigid components (basic body, locking elements) with elastic material (press-on element). This composite approach provides both secure locking and vibration damping protection against blank tool percussions.
2Object-affected harmful factors
If elastic material is used for vibration damping, then protection from blank tool percussions is improved, but structural rigidity decreases
Solution Approach 1:
The press-on element made of elastic material provides vibration damping while the overall tool fitting structure maintains rigidity through its composite design, combining flexible and rigid components appropriately.
Solution Approach 2:
The elastic press-on element is pre-installed to cushion against upcoming percussion vibrations before they can cause damage to the tool fitting components.
3Reliability
If multiple locking elements are used to ensure secure tool holding, then locking reliability is improved, but device complexity increases
Solution Approach 1:
Multiple locking elements are integrated into a unified tool fitting structure with a common basic body and shared press-on element, achieving secure tool holding through coordinated action of multiple components while maintaining overall structural coherence.
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
The elastic press-on element reduces stress on tool fitting components by damping vibrations, effectively transferring percussion energy and preventing damage from blank tool percussions.
Implementation Method 1
the press-on element consists at least partially of an elastic material. In this way, vibrations on components of the tool fitting that are generated by blank tool percussions can be damped
Implementation Method 2
the press-on element consists at least partially of an elastic material
Data Source
AI summary
A power tool, in particular a rotary hammer or combination hammer, containing a percussion-mechanism apparatus for generating percussion pulses on a tool, having a basic body for receiving a rear end of the tool, at least one first and second locking element, each arranged lying in radial openings of the basic body in a reversible manner in a locking position or release position, wherein, in the locking position, the rear end of the tool is held in the basic body and, in the release position, the rear end of the tool can be removed from the basic body, a locking ring for holding the at least first and second locking elements in the locking position, and a press-on element for guiding the at least first and second locking elements in a first axial direction and a second axial direction. The press-on element consists at least partially of an elastic material.