Stepped Bore Floor Charge Unit for Rotating Mobile Parts
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Solution Overview
Problem
Conventional systems face challenges in contactlessly transmitting electrical energy to mobile parts that can move on a floor while ensuring efficient energy transfer and protection of the charging infrastructure, especially during rotation and water accumulation.
Innovation Solution
A system with a stepped bore in the floor material incorporates a charge unit with a primary winding and a secondary winding on the mobile part, allowing inductive coupling and enabling rotation with omnidirectional drives, while a cable-routing part with a wing region and screwed cable gland ensures secure and protected routing of the cable.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a cable is routed through a groove to the stepped bore for power supply, then the electronic circuit can be supplied with electrical energy, but the cable is exposed and vulnerable to damage from water accumulation and mechanical stress
Solution Approach 1:
The cable-routing part is nested within the stepped bore structure, with the cable routed through a protected path that includes the groove and the vertical bore. The stepped bore acts as a protective housing that shields the cable from external environmental factors while maintaining electrical connectivity to the charge unit.
Solution Approach 2:
The cable-routing part serves as an intermediary structure between the groove and the stepped bore interior. It includes features like a base section and wing regions that guide and protect the cable as it transitions from the horizontal groove into the vertical bore, preventing direct exposure to harmful factors.
2Ease of manufacture
If the groove is uniform in width, then manufacturing is simpler, but the cable-routing part cannot be properly restricted and positioned in the groove
Solution Approach 1:
The groove is designed with varying width characteristics at different locations. The first region has a greater width to accommodate the base section of the cable-routing part, while the second region has a smaller width that allows the wing regions to rest against the bore wall. This local variation in geometry provides both manufacturing feasibility and proper positioning functionality.
3Adaptability or versatility
If the mobile part rotates on the spot with omnidirectional drive, then maneuverability is improved, but the inductive coupling between primary and secondary windings becomes difficult to maintain
Solution Approach 1:
The charge unit is designed with rotational symmetry around the bore axis, allowing it to function effectively regardless of the mobile part's angular position. The primary winding is configured to maintain inductive coupling with the secondary winding even when the mobile part rotates, enabling the system to support omnidirectional movement while preserving charging functionality.
Solution Approach 2:
The stepped bore structure creates a symmetric electromagnetic field distribution around the bore axis. This equipotential-like symmetry ensures that the inductive coupling between the primary and secondary windings remains stable during rotation, as the magnetic field strength and distribution remain consistent at all angular positions.
4Ease of manufacture
If the cable-routing part is allowed to move freely in the groove, then assembly is easier, but the cable is not properly protected and may be damaged by frame part effects
Solution Approach 1:
The cable-routing part has a base section with a specific radial distance range that overlaps with the first region of the groove. This local geometric feature provides form-fitting connection between the cable-routing part and the groove, securing the cable in a protected position while maintaining assembly simplicity through the natural interference fit.
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 and unobstructed charging of mobile parts during rotation and provides a stable, protected, and easily producible solution for contactless energy transmission, with the cable being routed in a protected manner and the system being resistant to water accumulation.
Implementation Method 1
A secondary winding is situated on the underside of the mobile part, which is able to be inductively coupled to the primary winding by reaching an area in the driving surface
Data Source
AI summary
In a system for contactlessly transmitting electrical energy to a mobile part movable on a floor, a stepped bore is provided in the floor. A frame part is situated on the step of the stepped bore. A charge unit is accommodated by the frame part and has a receiving part situated between upper and lower cover parts. A primary winding is situated on the inner side of the upper cover part and is fed by an electronic circuit supplied with electrical energy with the aid of a cable that is at least partially accommodated in a cable-routing part.The cable-routing part is situated in a groove having a radial extension in relation to, and guided through the step of, the stepped bore, so that the cable is routed underneath the step of the stepped bore.