Electric Motor Connection Piece With Elastic Constriction
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Solution Overview
Problem
Existing solutions for connecting electric motors to printed circuits are not suitable for rapid assembly and do not efficiently handle high current passages, typically between 50 to 200 amperes at 12 to 72 volts, lacking ease of connection and assembly efficiency.
Innovation Solution
The proposed solution involves a printed circuit with conductive inserts and coiled assemblies featuring connection pieces with specific cross-sectional designs, including shoulders, slots, and constriction, allowing for elastic deformation and secure mechanical and electrical contact, along with a thermally conductive core for heat evacuation in the motor design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional connection methods are used for electric motors, then mechanical and electrical connections can be established, but assembly time is excessive and rapid assembly is not achieved
Solution Approach 1:
The connection system is divided into separate modular components: connection pieces with integration elements, conductive inserts, and connection plugs. These segmented components can be pre-assembled and then rapidly connected together, eliminating time-consuming traditional assembly processes while maintaining reliable mechanical and electrical connections.
Solution Approach 2:
Connection pieces are pre-formed with integration elements (shoulders, slots, constrictions) that enable rapid assembly. The conductive inserts are pre-installed in the printed circuit board, and connection plugs are pre-attached to coil assemblies. This preliminary preparation allows the final assembly to be completed quickly by simply engaging the pre-configured components.
2Productivity
If simple connection structures are used, then assembly is rapid, but reliable mechanical and electrical contact for high currents cannot be ensured
Solution Approach 1:
The connection structure employs nested geometric features where integration elements (shoulders, slots, constrictions) fit together in a nested manner. The connection piece with its integrated shoulder and slot receives the connection plug, while the constriction provides a friction fit mechanism. This nested design ensures reliable mechanical retention and electrical contact without requiring complex external fastening mechanisms.
Solution Approach 2:
The connection system uses composite structural design combining different geometric features (shoulder for positioning, slot for insertion, constriction for retention) into integrated connection pieces. These composite structures provide both mechanical strength for reliable connection and electrical conductivity for high current passage, achieving both reliability and rapid assembly.
3Ease of manufacture
If conventional connection pieces are used, then manufacturing is simple, but friction fit mechanism for mechanical fixation is not achieved
Solution Approach 1:
The connection piece integrates multiple functions into a single component: the shoulder provides positioning and support, the slot enables insertion and alignment, and the constriction creates the friction fit mechanism. By merging these features into one integrated piece rather than separate components, the manufacturing process remains simple while achieving strong mechanical fixation through the combined action of all features.
Solution Approach 2:
The connection piece utilizes parameter variations in its geometry, particularly the constriction with reduced width compared to the slot opening. This parameter change creates the friction fit mechanism where the connection plug must be inserted with sufficient force to deform the constriction, then locks in place when the plug expands the constriction material. The design maintains manufacturing simplicity by using standard forming processes to create these parameter variations.
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 solution enables efficient high-current connections with rapid assembly capabilities and effective heat management, ensuring reliable mechanical and electrical contact while allowing for industrial production and assembly of motor components.
Implementation Method 1
at least one constriction of width less than the section of said connection plugs, to ensure a expansion of the neck of said connecting piece engaged in the hole of the insert of the printed circuit board
Implementation Method 2
a core of thermally conductive material having a first section in contact with the casing and a second section of lesser radius in contact with said tubular core of the motor, said core being in contact with the outer casing of the motor to ensure the evacuation of the heat produced by the coils
Data Source
Figure 1~2
Figure 3~4
Figure 5
AI summary
The invention relates to an electric motor comprising an assembly for connection to a printed circuit having a conductive insert (7) through which connection holes pass, and a coil assembly having electrical connections terminated by connection plugs (26). Said motor further comprises connection pieces ( ) comprising a rod, the outer cross-section of which matches the cross-section of said connection holes, the connection piece (1) having, at the proximal end thereof, a shoulder (20) with a cross-section greater than the cross-section of the said connection holes, the opposite end having a slot (5) extending up to said shoulder, and comprising an opening on the distal end with a width greater than or equal to the cross-section of said connection plugs (1) and at least one narrowing with a width less than the cross-section of said connection plugs (26), in order to ensure the expansion of the collar of said connection piece (1) engaged in the hole of the printed circuit insert.