Mechatronic Drive Module With Cam Piston for Electric Clamping
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Solution Overview
Problem
Hydraulic clamping devices in machine tools require multiple media sources, including hydraulic oil and electrical energy, which complicates their operation and increases complexity.
Innovation Solution
A drive module with a piston mounted in a rotationally fixed but longitudinally displaceable manner, actuated by an electric motor through a control cam and guide pin mechanism, eliminating the need for hydraulic fluid by using a purely electric motor drive for power transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If hydraulic cylinders are used to actuate clamping devices, then both tensile and compressive force can be applied, but multiple media (hydraulic oil and electrical energy) are required, increasing system complexity
Solution Approach 1:
The patent replaces the hydraulic mechanical system with an electromechanical system. An electric motor drives a cam mechanism that converts rotational motion into linear piston movement, eliminating the need for hydraulic oil and associated hoses while maintaining the ability to generate both pushing and pulling forces on the clamping device
Solution Approach 2:
The invention extracts and removes the hydraulic fluid medium from the system. By using a purely electromechanical drive with a cam-operated piston, the system eliminates hydraulic oil, hoses, and related hydraulic components, reducing system complexity while preserving force transmission capability
2Stress or pressure
If hydraulic cylinders are used for force transmission, then equivalent pressure can be applied to clamping devices, but hydraulic hoses and additional media supply are required
Solution Approach 1:
The hydraulic pressure generation system is replaced with an electromechanical cam mechanism. The cam profile is designed to generate the required pressure profile during rotation, converting simple rotational motor motion into the linear pressure-applying motion previously requiring hydraulic fluid transmission through hoses
3Adaptability or versatility
If hydraulic systems are used in machine tools, then clamping devices can be actuated, but the supply of hydraulic oil necessitates hose lines and multiple media
Solution Approach 1:
The invention completely removes hydraulic oil and other media from the system. The electromechanical cam-driven piston achieves clamping device actuation using only electrical energy to rotate the cam, eliminating the need for hydraulic fluid supply lines and media storage
Solution Approach 2:
The hydraulic fluid transmission system is substituted with a direct electromechanical connection. The electric motor rotates the cam, which directly translates rotational motion into linear piston movement through the guide pin mechanism, eliminating the intermediate hydraulic fluid medium
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
Enables efficient power transmission to clamping devices without additional media, providing equivalent pressure to hydraulic systems while simplifying the power supply to electrical energy alone, ensuring secure clamping without the need for hydraulic hoses.
Implementation Method 1
at least one guide pin is guided along a control cam inclined in the direction of the longitudinal axis to generate a piston stroke
Data Source
Figure 1
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Figure 4~5
AI summary
To create a mechatronic drive module to replace a hydraulically operated piston, it is proposed to provide a piston (21) and an axial unit (8). The piston is mounted so that it is rotationally fixed but longitudinally displaceable relative to the axial unit, while the axial unit is mounted rotatably but longitudinally immobile in a housing. Both elements engage via a cam in which guide pins (23) are guided and which has a control cam inclined in the direction of a longitudinal axis (6). A rotation of the axial unit, which can be generated by an electric motor, is converted into a piston stroke due to the shape of the control cam in the cam and the rotationally fixed mounting of the piston.