Motor Terminal Support Structure to Prevent Lead Wire Breakage
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
During the manufacturing of contact-type timing switches, the power supply terminals can move relative to the support, causing coil wires to become excessively tightened and potentially broken due to the pressing force, leading to manufacturing inefficiencies and increased costs.
Innovation Solution
Incorporating a first protrusion on the shell to restrict the movement of the power supply terminal, which prevents excessive tightening and breaking of the lead wire, while also providing a concave shape on the opposite side to reduce material costs and molding defects, and a second protrusion to prevent support deformation, ensuring smooth terminal pressing and improved manufacturing efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the tabs are pressed to the ends of the power supply terminals during assembly, then the electrical connection is achieved, but the power supply terminals move relative to the support causing coil wires to be excessively tightened and broken
Solution Approach 1:
The patent applies preliminary action by pre-setting the power supply terminal's position through the support structure with pressing portion recesses and protrusions before the actual pressing operation. The support is designed with built-in positioning features that restrict terminal movement in advance, preventing the harmful effect during assembly rather than correcting it afterward.
Solution Approach 2:
The support structure acts as an intermediary between the power supply terminal and the pressing force from tabs. The pressing portion with its recess and protrusion design mediates the pressing operation, distributing the force and preventing direct transmission of excessive movement to the coil wires, thus protecting them from damage.
2Productivity
If the power supply terminal is allowed to move during pressing, then the assembly is simpler, but the coil wires become excessively tightened and may break
Solution Approach 1:
The patent applies local quality by providing positioning features (pressing portion recesses and protrusions) only at specific locations where the power supply terminal makes contact with the support. This localized constraint design allows free movement elsewhere while controlling position precisely where needed, maintaining both productivity and precision.
Solution Approach 2:
The support structure is pre-configured with pressing portion recesses and protrusions that establish the correct terminal position before assembly. This preliminary positioning action ensures that when tabs press the terminals, the position is already controlled, eliminating the need for complex real-time positioning during assembly.
3Manufacturing precision
If the support structure is rigid to prevent terminal movement, then terminal position is controlled, but the support may deform under pressing force
Solution Approach 1:
The patent applies parameter changes by optimizing the support structure's geometric parameters - specifically designing the pressing portion with recesses and protrusions that provide positional control while distributing mechanical stress. The dimensions and shapes of these features are carefully selected to balance rigidity for position control with flexibility to prevent deformation under pressing loads.
Data Source
AI summary
A motor device includes a shell, a motor body and a connection terminal. The motor body is supported on the shell and includes a power supply terminals a support and a lead wire. The power supply terminal penetrates a through hole of the support in a first direction and is pressed into a pressing portion of the connection terminal. The lead wire extends from the power supply terminal in a direction perpendicular to the first direction, or extends in a direction inclined with respect to the first direction toward a side approaching the connection terminal. A first protrusion restricting movement of the power supply terminal in the first direction toward a side opposite to the connection terminal is provided at a position on the shell facing the power supply terminal in the first direction.