Electric Hammer Linear Drive Coupling Mechanism
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Solution Overview
Problem
Pneumatic knockers require compressed air, which may not be available everywhere, limiting their flexibility and efficiency, and necessitate a compressor for operation.
Innovation Solution
A knocker with a coupling element that forms a non-positive or positive connection with the percussion piston, which is released when a preload threshold is exceeded, allowing the spring element to accelerate the piston for impact, driven by an electric motor for increased flexibility and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If compressed air is used to operate the knocker, then the impactor can achieve effective knocking action, but the device requires a compressor and medium supply line which reduces flexibility and increases system complexity
Solution Approach 1:
The patent replaces the pneumatic system (compressed air, compressor, medium supply line) with an electric motor-driven mechanical system. The electric motor drives a coupling element that linearly moves the percussion piston, eliminating the need for compressed air infrastructure and significantly improving operational flexibility while maintaining effective knocking action.
Solution Approach 2:
The patent extracts and removes the pneumatic components (compressor, medium supply line, pressure chambers) from the system, retaining only the essential function of generating impact force through an electrically driven mechanical system. This extraction eliminates the dependency on compressed air infrastructure.
2Extent of automation
If a coupling element with force-locking or form-locking connection is used, then the percussion piston can be automatically released when preload threshold is exceeded, but the device complexity increases
Solution Approach 1:
The coupling element employs a dynamic connection mechanism that transitions between locked and released states based on the preload threshold. The force-locking or form-locking connection automatically engages during the driving stroke and releases when the spring element exceeds the predefined threshold, providing automated control without complex additional components.
Solution Approach 2:
The coupling element combines multiple functions into a single component: it transmits driving force from the linear drive, maintains force-locking or form-locking connection with the percussion piston, and automatically releases when the preload threshold is exceeded. This merging reduces the need for separate control mechanisms.
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 electrically driven knocker operates independently of compressed air, offering greater flexibility and efficiency, with the ability to set or select the impact pulse through motor control, and is cost-effective as electrical energy is more widely available.
Implementation Method 1
a spring element that can be preloaded along the axis in a preload direction... The energy stored in the spring element is then released and the spring element accelerates the impact piston downwards
Implementation Method 2
the coupling element and the percussion piston are connectable to one another by means of a magnetic holding force
Data Source
Figure 1
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Figure 4
AI summary
The invention relates to a hammer (10) and a method for operating a hammer (10). The hammer comprises a housing (12), a striking piston (26) linearly movable along an axis (a) in the housing (12), and a spring element (30) that can be pre-tensioned along the axis in a pre-tension direction and that is supported on one side against the housing (12) and on the other side against the striking piston (26). The hammer also comprises a coupling element (28) that can be connected to the striking piston (26) by frictional or positive locking and is linearly movable in the housing (12), and a linear drive that drives the coupling element (28) along the axis (a), wherein the coupling element (28) is configured to release the striking piston (26) when a pre-tension threshold is exceeded.