Friction Clutch Radial Dimension Reduction via Nested Magnet Carrier
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Solution Overview
Problem
Existing friction clutches with magnetic couplings face limitations due to their external dimensions, particularly in the radial direction, restricting their use in applications with limited installation space.
Innovation Solution
A compact friction clutch design featuring a friction disc clutch with an electromagnet arrangement, where a tubular coil carrier and radially outer web section minimize radial extensions, allowing for a space-saving arrangement of permanent magnets, enabling torque transmission while allowing for disengagement through magnetic field manipulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If traditional friction clutch designs with coil formers and web sections are used, then torque transmission function is achieved, but radial dimensions become too large for limited installation spaces
Solution Approach 1:
The invention repositions the permanent magnet means from a traditional radial arrangement to an axial arrangement on the radially outer web section. This dimensional change allows the magnetic coupling function to be achieved within the axial direction rather than requiring additional radial space, thereby reducing the overall radial dimensions while maintaining torque transmission capability
Solution Approach 2:
The permanent magnet means are integrated into the radially outer web section of the coil carrier, with the magnet means being positioned on the outer surface of the web section. This nesting approach combines multiple functions (structural support and magnetic coupling) into a single integrated component, eliminating the need for separate radial extensions
2Volume of moving object
If compact design with minimal radial extensions is implemented, then installation space is reduced, but manufacturing complexity increases
Solution Approach 1:
The radially outer web section is designed to serve multiple functions simultaneously: providing structural support for the coil body, carrying the permanent magnet means for magnetic coupling, and forming part of the magnetic circuit. This multi-functionality eliminates the need for separate components, simplifying the overall manufacturing process despite the compact design
Solution Approach 2:
The invention merges the permanent magnet means directly with the radially outer web section of the coil carrier, creating an integrated assembly. This combination reduces the total number of parts and assembly steps, making the compact design economically producible rather than overly complex
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 design allows for efficient torque transmission and disengagement in limited radial space, providing a compact and economically producible solution for applications with constrained installation conditions.
Implementation Method 1
permanent magnet means are present between the inner and outer web sections of the coil carrier, via which an axially movable friction section of the friction clutch can be magnetically connected to the rotor
Implementation Method 2
By energizing the electromagnet, the effect of the permanent magnets can then be weakened or eliminated with the magnetic field generated by the coil
Implementation Method 3
the magnetic field generated by the coil in such a way that the friction clutch is disengaged under the action of the spring force
Data Source
Figure 1
AI summary
The friction clutch has a friction disk clutch (5) with an electromagnet assembly (4) for supporting a coil body (9). The electromagnet assembly comprises a partially surrounding ferromagnetic conductive coil support (13). A radially outer ridge portion (13b) is exclusively formed as a tubular element. The tubular element has a uniform wall thickness, and completely covers an outer surface (14b) of a permanent magnet medium (14) in a circumferential manner.