Split Cage Deep Groove Ball Bearing for Heat-Resistant Assembly
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Solution Overview
Problem
Conventional deep groove ball bearings in drive motors for new energy vehicles face issues with high-temperature rise during rapid acceleration or deceleration, leading to cage melting or fracture, and have inefficient production processes.
Innovation Solution
A deep groove ball bearing design featuring a split cage structure with upper and lower cage bodies, alternate pocket grooves, and a connecting mechanism using insertion pieces and grooves for secure assembly, along with elastic positioning pieces and oil storage for lubrication and cooling, made from materials like glass fiber reinforced polyamide and polyetheretherketone for strength and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the cage is made as a single integrated structure, then the structural strength is improved, but the manufacturing complexity and production time increase significantly
Solution Approach 1:
The cage is divided into multiple independent arc-shaped cage bodies, each containing some ball pockets. These segmented cage bodies are assembled together to form the complete cage structure. This segmentation reduces manufacturing complexity and allows parallel production of multiple cage bodies, improving production efficiency while maintaining structural integrity through proper assembly connection.
2Strength
If the cage is made as a single integrated structure, then the structural strength is improved, but the production efficiency decreases
Solution Approach 1:
The cage is divided into multiple independent arc-shaped cage bodies that can be manufactured separately and assembled together. This segmentation enables parallel production of multiple cage bodies simultaneously, significantly reducing total production time and improving manufacturing efficiency while maintaining the required structural strength through proper connection design.
3Temperature
If the cage material has high strength to resist high temperature, then the temperature resistance is improved, but the weight increases
Solution Approach 1:
The cage is made from composite materials such as glass fiber reinforced polyamide 66 (PA66), glass fiber reinforced polyamide 46 (PA46), or polyetheretherketone (PEEK). These composite materials provide high strength and temperature resistance while maintaining lightweight properties, achieving both high-temperature resistance and low weight requirements for the cage structure.
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 design enhances stability, simplifies installation, improves production efficiency, and extends the service life of the bearing by preventing loosening and providing effective lubrication and cooling, resulting in a more reliable and efficient deep groove ball bearing.
Implementation Method 1
An insertion piece and an insertion groove are provided between the connecting portion and the positioning portion, and the insertion piece and the insertion groove are configured to be fixed with each other to form a fixed connection between the upper cage body and the lower cage body
Implementation Method 2
the cage bodies are made of an injection molding material, which is usually glass fiber reinforced polyamide 66 (PA66), glass fiber reinforced PA46, and glass fiber reinforced polyetheretherketone (PEEK), thereby ensuring the strength of the cage, yielding a lightweight cage body, maintaining a stability of the bearing
Data Source
AI summary
A deep groove ball bearing includes an outer ring, an inner ring, a cage, and steel balls. The cage is provided between the outer ring and the inner ring. Pockets are formed in the cage, and the steel balls are placed in the pockets. The cage is split into an upper cage body and a lower cage body. Pocket grooves are formed alternately in each of the upper cage body and the lower cage body. A connecting portion is provided between adjacent pocket grooves in the upper cage body. A positioning portion is provided between adjacent pocket grooves in the lower cage body. An insertion piece and an insertion groove are provided between the connecting portion and the positioning portion. The insertion piece and the insertion groove are configured to be fixed with each other to form a fixed connection between the upper cage body and the lower cage body.