Integrated Wheel Hub Drive Assembly with Merged Bearing and Gear
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Solution Overview
Problem
Existing wheel hub drive systems occupy excessive space due to separate integration of the wheel hub bearing and reduction gear, leading to conflicts with vehicle suspension and inefficient use of the wheel hub space.
Innovation Solution
A wheel hub drive unit with an integrated reduction gear and wheel hub bearing, where the output end of the reduction gear is connected to the rotating ring of the wheel hub bearing, which is connected to the wheel hub, optimizing the space within the wheel hub by integrating the reduction gear and wheel hub bearing into the wheel hub drive device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the wheel hub bearing and reduction gear are separately integrated into the wheel hub, then the drive function is achieved, but the space occupation increases and conflicts with vehicle suspension
Solution Approach 1:
The patent merges the wheel hub bearing and reduction gear into a single integrated assembly where the bearing's rotating ring directly connects to the reduction gear's output. This combination eliminates the need for separate mounting spaces for both components, reducing overall volume occupation in the wheel hub while maintaining both bearing and drive functions.
Solution Approach 2:
The wheel hub bearing is designed to serve dual functions: supporting wheel rotation through bearing functionality and transmitting drive torque through its connection to the reduction gear. This multi-functionality eliminates the need for separate dedicated components for each function, optimizing space utilization within the wheel hub.
2Reliability
If the wheel hub bearing is separated from the reduction gear by clearance, then independent function is maintained, but space efficiency decreases and system expands outward
Solution Approach 1:
The patent eliminates the clearance separation between the wheel hub bearing and reduction gear by directly connecting the bearing's rotating ring to the reduction gear's output shaft. This merging removes the gap while maintaining functional independence through proper mechanical coupling, thereby reducing the overall length and preventing outward expansion of the wheel hub assembly.
3Ease of manufacture
If separate connection of wheel hub bearing and reduction gear is used, then assembly flexibility is maintained, but device complexity increases
Solution Approach 1:
The patent combines the wheel hub bearing and reduction gear into a single integrated unit with direct connection between the bearing's rotating ring and the reduction gear output. This merging reduces the number of separate connection interfaces and fastening elements required, thereby simplifying the overall connection structure while maintaining assembly flexibility through modular design.
Data Source
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AI summary
A wheel hub drive unit (100) comprising a wheel hub (110); a wheel hub bearing (10) arranged in the wheel hub (110) and on its central axis, wherein of the inner ring (11) and outer ring (12) of the wheel hub bearing (10) one of the two rings is a rotating ring and the other a non-rotating ring; a housing (20) enclosing the wheel hub bearing (10) and forming a housing space, the housing space comprising a sealed first receiving chamber and a sealed second receiving chamber; a drive device (30) arranged in the first receiving chamber; a reduction gear (40) arranged in the second receiving chamber; wherein the input end of the reduction gear (40) is connected to the output end of the drive device (30), the output end of the reduction gear (40) is connected to the rotating ring and the rotating ring is also connected to the wheel hub (110);and the non-rotating ring is connected to the housing (20). The wheel hub drive unit integrates a reduction gear and a wheel hub bearing into a wheel hub drive device, and the arrangement of the drive device, wheel hub bearing, and reduction gear in the limited wheel hub space is optimized.