Motor Bearing Support Design to Reduce Positioning Complexity and Cost
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing motors for home appliances, such as pumps and washing devices, have complex structures and high component costs due to the need for additional positioning parts in the bearing system, leading to unsatisfactory performance and increased production expenses.
Innovation Solution
A motor design that incorporates a support member with a positioning wall and a bearing system without an additional positioning part, utilizing a reinforcing rib, barb, and cushioning ring to securely position and support the bearing, reducing complexity and costs while enhancing radial and axial rigidity and vibration cushioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an additional positioning part is used to position the bearing, then the bearing positioning reliability is improved, but the device complexity and component costs increase
Solution Approach 1:
The support member is designed to perform multiple functions simultaneously: it provides both radial support for the bearing through its cylindrical inner surface and axial positioning through the positioning wall with barb structure. This merging of support and positioning functions into a single component eliminates the need for separate positioning parts, reducing structural complexity while maintaining positioning reliability
Solution Approach 2:
The support member serves as a multi-functional component that combines bearing support, axial positioning, and vibration damping (through the integrated cushioning ring). This universal design approach allows one component to fulfill multiple roles that would traditionally require separate parts, thereby simplifying the overall motor structure
2Reliability
If an additional positioning part is used to position the bearing, then the bearing positioning reliability is improved, but the component costs and production costs increase
Solution Approach 1:
By combining the positioning function into the support member, the total number of components is reduced. This merging eliminates the need for separate positioning parts, directly reducing component costs and simplifying assembly operations, thereby lowering production costs while maintaining positioning reliability
Solution Approach 2:
The support member is designed to automatically position the bearing through its integrated positioning wall and barb structure without requiring additional positioning components. The cushioning ring further enhances this self-positioning capability while providing vibration damping, eliminating the need for separate positioning parts and reducing both component and manufacturing costs
3Manufacturing precision
If a positioning wall with barb structure is used, then the axial positioning of the bearing is improved, but the radial rigidity requirement increases
Solution Approach 1:
The positioning wall is designed with localized structural features: the barb structure provides concentrated axial positioning force where needed, while the overall positioning wall geometry and material selection ensure sufficient radial rigidity. The cushioning ring is strategically placed to provide radial support and vibration damping without interfering with the axial positioning function of the barb
Solution Approach 2:
The support member is made from a composite material or engineered plastic that combines high radial rigidity with appropriate flexibility for the positioning wall structure. This allows the positioning wall to maintain sufficient radial stiffness while the barb structure provides precise axial positioning, and the integrated cushioning ring adds vibration damping capability
4Object-affected harmful factors
If the cushioning ring is added to cushion vibration, then the vibration damping is improved, but the device complexity increases
Solution Approach 1:
The cushioning ring is integrated into the support member assembly, combining vibration damping functionality with the existing bearing support structure. This integration allows the cushioning ring to work in conjunction with the positioning wall and barb structure without requiring separate mounting mechanisms, thereby reducing the increase in device complexity while effectively cushioning vibration
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
The solution results in a simpler motor structure with lower component and production costs, improved reliability, and extended service life of the bearing, while maintaining effective axial and radial positioning and vibration damping.
Implementation Method 1
a cushioning ring sleeved on the bearing, where the positioning wall includes an arc-shaped groove accommodating the cushioning ring. In this way, vibration between the rotor and the casing can be cushioned
Implementation Method 2
the positioning wall can be at least partially elastically deformed
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A motor (10) is provided, including: a stator (12); a casing (14), receiving the stator (12), and including a support member (16); a bearing (18), engaged inside the support member (16); a rotor shaft (20), supported by the bearing (18); and a rotor (22), adapted to rotate around the rotor shaft (20) relative to the stator (12). The present invention further relates to a pump (60) and a washing device (100) that include the motor (10), and a washing device (100) including the pump (60).