Grinding Head Tool Holder With Magnetic Pin Lock
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Solution Overview
Problem
Existing grinding heads for surface grinding machines experience tool dislocation due to shear forces, leading to uncontrolled grinding or polishing processes, especially when working with hard materials like concrete or marble.
Innovation Solution
A grinding head with a tool holder and tools connected via a releasable magnetic or hook and loop fastener connection, utilizing permanent magnets or Velcro, along with pins and cavities to secure the tools in place, preventing movement and rotation, and allowing easy tool replacement without tools.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a releasable sticking connection (magnetic or hook and loop) is used to connect grinding tools to the tool holder, then tool replacement becomes easy and quick, but the connection is insufficient to withstand large frictional shear forces during grinding, causing tool dislocation or separation
Solution Approach 1:
The connection system is divided into two independent functional components: a releasable sticking connection (magnetic or hook and loop) for easy tool replacement, and a mechanical positioning element (pin in cavity) for structural stability. Each component addresses a specific requirement without compromising the other.
Solution Approach 2:
The patent combines two different connection mechanisms into a single integrated system: the releasable sticking connection provides easy attachment and detachment, while the pin-cavity mechanical constraint prevents tool dislocation under shear forces. Both mechanisms work simultaneously to achieve both ease of operation and connection reliability.
2Reliability
If a clamping connection using bolts and nuts is used to connect grinding tools to the tool holder, then the connection can withstand large shear forces, but tool replacement requires equipment and time-consuming loosening or tightening
Solution Approach 1:
The traditional mechanical fastening system (bolts and nuts requiring tools) is replaced with a magnetic or hook and loop fastening system that can be operated by hand. The mechanical strength requirement is satisfied not by the fastening mechanism itself, but by the separate pin-cavity positioning system that prevents tool movement.
3Manufacturing precision
If the grinding tools are securely locked to prevent any movement, then grinding precision is maintained, but tool replacement becomes difficult and time-consuming
Solution Approach 1:
The connection system transitions from a static permanently locked state to a dynamic state where the tool can be easily attached and detached. The pin-cavity provides structural locking for precision during operation, while the magnetic or hook and loop connection allows for dynamic reconfiguration and quick tool changes when needed.
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 solution provides a secure and reliable connection that withstands shear forces and temperature increases, allowing for efficient grinding or polishing with reduced risk of tool dislocation and simplified tool replacement, while minimizing interference with other systems.
Implementation Method 1
the at least two grinding tools or the tool holder comprises permanent magnets and the other one of the at least two grinding tools or tool holder comprises magnetic or magnetizable material to cooperate with the permanent magnets in order to connect the at least two grinding tools to the tool holder
Data Source
AI summary
The invention relates to a grinding head for a grinding machine. The grinding head comprises a tool holder, which in use is moved in a plane, in particular rotated or translated back and forth, by the grinding machine. The grinding head furthermore comprises at least two tools which are connectable to the tool holder by a releasable sticking connection. One of the tools or the tool holder is provided with at least one protrusion and the other one is provided with an associated cavity to lock which extend transverse to said plane of movement of the tool with respect to the tool holder in a direction parallel to said plane when the tool is connected to the tool holder.