Geared Motor Lead Passage to Prevent Gear Train Contact
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Solution Overview
Problem
The existing geared motor designs for refrigerators face limitations in power feeding flexibility due to restricted motor lead wire positioning, which can lead to contact issues between the motor lead wires and the gear train, making it inconvenient to use and assemble.
Innovation Solution
A geared motor design with a motor lead wire passage that extends in the Y direction between the gear train's turning center axial lines and the case body, allowing the lead wires to be bent and routed around the gear train, preventing contact and enhancing flexibility in power feeding positions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If motor lead wires are arranged within the case and connected near the motor, then the structure is simple, but the power feeding position flexibility is limited and lead wires may contact the gear train
Solution Approach 1:
The motor lead wire passage extends in the Y direction (lateral direction) rather than only in the axial direction, creating a new spatial dimension for wire routing. This allows lead wires to be fed from positions separated from the motor in the Y direction while maintaining a simple case structure without requiring complex three-dimensional routing paths.
Solution Approach 2:
The case is divided into a case body part and a bottom plate part, with the motor lead wire passage formed by their combination. This segmentation allows the passage to be integrated into the case structure without adding separate complex routing components, maintaining structural simplicity while enabling flexible wire routing.
2Ease of operation
If motor lead wires are routed away from the motor, then power feeding flexibility improves, but the risk of contact with gear train increases
Solution Approach 1:
The motor lead wire passage serves as an intermediary structure that guides and isolates the lead wires from the gear train. By providing a dedicated routed path through the case, the passage acts as a physical barrier and guide that separates wire routing from gear train operations, preventing contact while enabling flexible external positioning.
3Adaptability or versatility
If connector is disposed at a position separated from the motor, then power feeding flexibility improves, but the motor lead wires may be contacted with the gear train
Solution Approach 1:
The lead wire routing function is extracted from the immediate motor vicinity and channeled through the dedicated motor lead wire passage in the case. This separates the wire routing path from the gear train space, allowing the connector to be positioned flexibly outside the motor area while maintaining reliable separation from moving gear components through the structured passage.
Data Source
Figure 1(a)~1(c)
Figure 2(a)~2(b)
Figure 3(a)~3(c)
AI summary
The present invention provides a geared motor in which a motor lead can be routed within a case to a position set apart from a motor, and a damper device. In the geared motor (10) that is used in the damper device, the case (3) is provided with a motor lead passage (30) that extends in the Y-direction through a position flanked, in the Z-direction, by a side plate part (321) of a case trunk part (32) and the rotation axis (L68) of a driving gear (68) that is included in a gear train (65). It is therefore possible, with the Z-direction positions of a plurality of motor leads (7) being defined, to extend the motor leads (7) in the Y-direction. The Z-direction dimension of the geared motor (10) can then be reduced because the motor leads (7) will then partially overlap the drive gear (68) in the motor lead passage (30) as viewed from the X-direction.