Overload Clutch Magnetic Control Bolt Actuation
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Solution Overview
Problem
Mechanical overload clutches with automatic restart suffer from significant wear and noise due to permanent contact between control pins and connected parts, especially during long run-down times and high-speed operations.
Innovation Solution
The use of permanent magnets to repel control bolts away from the switching part in non-engagement positions, eliminating contact and wear, and utilizing retaining magnets to enhance the repulsive force for efficient re-engagement at low speeds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If spring elements are used to press control bolts against the switching element, then the control bolts remain in permanent contact with the switching element and ball cage, but this results in significant wear and noise during long disengagement times and high-speed operations
Solution Approach 1:
The patent replaces the mechanical spring element with a magnetic field-based actuation system. Permanent magnets mounted on the control bolt interact with corresponding magnets on the switching element to provide contactless actuation, eliminating the permanent mechanical contact that causes wear and noise while maintaining reliable control function
Solution Approach 2:
The patent introduces magnetic fields as an intermediary between the control bolt and switching element. The magnetic interaction serves as a non-contact mediator that transmits the control force without requiring direct physical contact, thereby eliminating wear and noise generation
2Ease of operation
If control bolts are in permanent contact with the switching element and ball cage, then the clutch can be actuated reliably, but significant wear occurs on the control pins and contacted parts during long disengagement times
Solution Approach 1:
The patent replaces the mechanical spring element with a magnetic field-based actuation system. Permanent magnets mounted on the control bolt interact with corresponding magnets on the switching element to provide contactless actuation, eliminating the permanent mechanical contact that causes wear and noise while maintaining reliable control function
Solution Approach 2:
The magnetic actuation system provides intermittent, on-demand engagement rather than continuous contact. The control bolt is actuated only when needed for clutch engagement, reducing wear during extended disengagement periods while maintaining operational reliability
3Speed
If control pins contact the ramps of the switching element at higher speeds, then the clutch can be actuated quickly, but considerable noise is generated
Solution Approach 1:
The patent replaces the mechanical spring element with a magnetic field-based actuation system. Permanent magnets mounted on the control bolt interact with corresponding magnets on the switching element to provide contactless actuation, eliminating the permanent mechanical contact that causes wear and noise while maintaining reliable control function
Solution Approach 2:
The patent introduces magnetic fields as an intermediary between the control bolt and switching element. The magnetic interaction serves as a non-contact mediator that transmits the control force without requiring direct physical contact, thereby eliminating wear and noise generation
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
Significantly reduces wear and noise by maintaining contact-free operation during high-speed disengagement and ensures wear-free, noiseless re-engagement of the clutch.
Implementation Method 1
permanent magnets mounted on said control bolt which, depending on their polarity, either repel or attract said switching element
Data Source
Figure 1~3
Figure 4~6
Figure 7~9
AI summary
Disengaging overload clutch, having a clutch hub (2) and a pressure flange (1) which is mounted rotatably thereon and in which transmission bodies (3) are arranged which are held in the recesses (7) of the pressure flange (1) by way of the force of spring elements (9) and transmit the torque from the pressure flange (1) to the clutch hub (2). In the case of overload between the clutch hub (2) and the pressure flange (1), the clutch moves in a first rotational direction D1 into a disengaged state, wherein the relatching takes place by way of a rotation between the clutch hub (2) and the pressure flange (1) in a second opposite rotational direction D2, to be precise via the interaction between the control pins (16), the control cams (18) which are connected to the clutch hub (2), and further control grooves (17) with groove flanks (34). According to the invention, the control pins (16) are fitted with pin magnets (19) which are pressed away from control magnets (20) of identical polarity which are provided on the clutch hub (2), in order to bring the control pins (16) into engagement with the control cams (18) and the control grooves (17).