Drivetrain for a mixer with reduced operating noise
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing mixer drivetrains are large and difficult to assemble, increasing production time and complexity.
Innovation Solution
A single stage planetary gear set with stepped planet gears, a sun gear, and ring gears is used, which is more compact and easier to assemble, utilizing powdered metal for reduced noise and precise fitting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a two stage or double planetary gear set is used, then the gear reduction ratio is increased, but the device size and assembly complexity increase
Solution Approach 1:
The planet gears are segmented into multiple tooth sections along the axial direction, with each section meshing with different ring gears. This segmentation allows a single stage planetary gear set to achieve the functional equivalent of multiple stages, reducing assembly complexity and production time while maintaining high gear reduction ratio.
Solution Approach 2:
The patent introduces axial dimension to the planet gear structure by creating stepped tooth sections at different axial positions. This dimensional transformation enables multiple gear meshing relationships within a single stage, effectively achieving multi-stage reduction without the complexity of actual multi-stage assemblies.
2Volume of stationary object
If a single stage planetary gear set is used, then the device size is reduced, but the gear reduction ratio may be insufficient
Solution Approach 1:
The planet gears are divided into multiple tooth sections with different numbers of teeth, arranged axially. Each tooth section engages with a corresponding ring gear, creating multiple independent gear reduction paths within a single stage. This segmentation enables high gear reduction ratio while maintaining compact drivetrain volume.
Solution Approach 2:
The patent employs composite structural design where planet gears combine multiple tooth sections with different geometric parameters in a single component. This composite approach allows the single stage planetary gear set to achieve the functional equivalent of multiple stages, providing high reduction ratio in a compact configuration.
3Manufacturing precision
If conventional manufacturing methods are used, then the production cost is controlled, but the assembly precision and noise reduction are insufficient
Solution Approach 1:
The patent specifies precise geometric parameters for each tooth section of the planet gears, including different numbers of teeth and axial positions. These parameter variations enable precise meshing with corresponding ring gears, improving assembly precision and reducing operating noise through optimized gear engagement.
Data Source
AI summary
A drivetrain for coupling a motor to a mixer shaft within a mixer includes a sun gear connectable to a rotor of the motor. The drivetrain also includes a plurality of stepped planetary gears. Each of the stepped planetary gears includes a first tooth section and a second tooth section. A first ring gear is mounted such that the first ring gear is fixed. The first ring gear and the sun gear are meshed with the stepped planetary gears at the first tooth section. A second ring gear is meshed with the stepped planetary gears at the second tooth section. The sun gear, the stepped planetary gears, the first ring gear, and the second ring gear collectively form a single stage planetary gear set of the drivetrain.