Motor Protector Mount With Elastic Arms for Vibration Stability
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Solution Overview
Problem
Existing methods for attaching motor protectors to encapsulated-type electric compressors are inefficient, leading to low responsiveness, poor workability, and increased vulnerability to vibration, particularly for larger and heavier motor protectors, which can result in detachment and damage to connection lines.
Innovation Solution
A device comprising an accommodating member with insulating properties and a fixation member with elastic arm portions and assisting portions that securely attach the motor protector to the compressor container, enhancing cooling efficiency and resistance to vibration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the motor protector is covered with a sleeve made of insulating resin and tied to motor winding, then the motor protector is protected from direct contact with motor winding, but the attachment work becomes complicated and work efficiency decreases
Solution Approach 1:
The invention divides the attachment system into separate functional components: an accommodating member that holds the motor protector and a fixation member that secures the accommodating member to the compressor container. This segmentation eliminates the need for complex sleeve covering and tying operations, significantly improving work efficiency while maintaining protection functionality.
Solution Approach 2:
The accommodating member acts as an intermediary between the motor protector and the fixation member. It provides a standardized interface that simplifies the attachment process, allowing the motor protector to be securely held without requiring direct complex fastening to the motor winding or compressor container.
2Reliability
If the motor protector is covered with a sleeve made of insulating resin, then the motor protector is insulated from motor winding, but the efficiency of refrigerant in cooling the motor protector decreases and temperature rises
Solution Approach 1:
The accommodating member is designed with selective insulation properties - it provides electrical insulation where needed while maintaining thermal conductivity in regions where refrigerant flow occurs. This local differentiation of material properties allows simultaneous achievement of electrical protection and thermal management.
Solution Approach 2:
The accommodating member uses a thin-walled structure that provides sufficient electrical insulation while minimizing thermal resistance. The thin film design allows efficient heat transfer from the motor protector to the surrounding refrigerant, preventing temperature rise even with insulation present.
3Productivity
If the motor protector is accommodated in a case made of resin and attached to metal fitting through snap fitting, then cooling efficiency improves and workability improves, but an increase in size and weight leads to increased vibration and likelihood of detachment
Solution Approach 1:
The fixation member incorporates elastic arm portions that can dynamically adapt to vibrations and mechanical stresses. These elastic components absorb vibration energy and maintain secure engagement, preventing detachment even when the motor protector increases in size and weight.
Solution Approach 2:
The elastic arm portions are designed with curved geometries that provide both mechanical strength and flexibility. The curved structure allows the arms to bend and absorb vibration while maintaining clamping force on the accommodating member, ensuring reliable attachment.
4Ease of manufacture
If the motor protector is accommodated in a case made of resin and attached through snap fitting, then attachment workability improves, but the connection line becomes vulnerable to damage due to friction from shaking
Solution Approach 1:
The elastic arm portions are designed to provide cushioning force before vibration damage can occur. The elastic deformation of these arms absorbs vibration energy and reduces friction on connection lines, protecting them from damage while maintaining easy snap-fit attachment.
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
Improves responsiveness and workability by maintaining the motor protector's attachment even under vibration, reducing the risk of detachment and enhancing cooling efficiency, thus addressing the limitations of previous methods.
Implementation Method 1
at least one of the two arm portions is elastically opened in a direction away from the other to receive the accommodating member, and once the accommodating member is pushed to a predetermined position, the two arm portions are able to sandwich and hold the accommodating member between the two arm portions with a restoring force of the elastically opened arm portion
Implementation Method 2
assisting portions that extend from the base portion to the side of the accommodating member, are caused to pass through assisting portion insertion holes provided in the accommodating member and stick out inside the accommodating member and at positions where the assisting portions sandwich the accommodating member with the arm portions in a case where the accommodating member is attached to the fixation member, and cause an elastic force to act on the accommodating member to restrict movement of the accommodating member in a case where the accommodating member moves in a direction that is parallel to the base portion
Data Source
AI summary
A device for attaching a motor protector includes: an accommodating member; and a fixation member to which the accommodating member accommodating a motor protector is detachably attached. The fixation member includes a base portion and at least two arm portions. The two arm portions sandwich and hold the accommodating member once the accommodating member is pushed to inside of the two arm portions. The fixation member further includes assisting portions that extend from the base portion to a side of the accommodating member, are caused to pass through assisting portion insertion holes provided in the accommodating member and stick out inside the accommodating member and at positions where the assisting portions sandwich the accommodating member with the arm portions, and cause an elastic force to act on the accommodating member in a case where the accommodating member moves in a direction that is parallel to the base portion.