Angular Gear Unit Sintered Ring Gear Assembly
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Solution Overview
Problem
Existing angular gears face challenges in manufacturing efficiency, structural complexity, and assembly difficulties due to expensive components like deep groove ball bearings and complex retaining mechanisms, which hinder rational manufacturing and simplify assembly.
Innovation Solution
The second planetary gear is designed as a pre-assembled unit with a form-fitting, non-rotatable ring gear and a locking washer for simplified assembly, along with a slide bearing for the crown wheel, enabling cost-effective production and secure fixation of components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a deep groove ball bearing is used in the gear cover, then the bearing capacity and reliability are improved, but the manufacturing cost and device complexity increase
Solution Approach 1:
The patent replaces the expensive deep groove ball bearing with a simple slide bearing made of耐磨 material. This simple bearing is designed to be replaced if necessary, achieving reliable operation at low cost and low complexity.
Solution Approach 2:
The patent changes the bearing type from deep groove ball bearing to slide bearing, and uses sintered material with specific properties (brinell hardness 20-40, porosity 20-35%) to achieve the required bearing capacity through material parameter optimization rather than complex structure.
2Stability of the object's composition
If individual retaining rings are used to fix planet gears, then the axial fixation is achieved, but the assembly complexity and manufacturing cost increase
Solution Approach 1:
The patent merges the planet gear and ring gear into a single sintered component with integrated tooth structures. This eliminates the need for separate retaining rings and complex axial fixation mechanisms, achieving stable assembly through the unified structure.
Solution Approach 2:
The patent uses sintered composite material with specific properties (brinell hardness 20-40, porosity 20-35%) to create a single-piece structure that combines the planet gear and ring gear, eliminating the need for separate fixation components.
3Ease of manufacture
If a multi-part housing is used, then the manufacturing flexibility is improved, but the assembly complexity and sealing difficulty increase
Solution Approach 1:
The patent merges the housing into a simplified single-piece structure that accommodates the sintered gear assembly. This reduces the number of parts and eliminates complex sealing requirements while maintaining manufacturing flexibility through the sintering process.
4Stability of the object's composition
If complex reworking is done on the housing for the ring gear, then the ring gear is securely mounted, but the manufacturing time and cost increase
Solution Approach 1:
The patent uses sintered composite material to create a single-piece structure where the ring gear and planet gears are integrated. This eliminates the need for complex reworking of the housing, as the gear assembly is manufactured as one piece and simply inserted into the housing.
Solution Approach 2:
The patent performs preliminary action by manufacturing the complete gear assembly (ring gear, planet gears, and support structure) as a single sintered component before installation. This pre-integrated structure requires no complex housing reworking, significantly improving manufacturing efficiency.
Data Source
Figure 1
Figure 2~3
Figure 4~5
AI summary
The angle gear box has a gear preliminary stage (1) that is provided a planetary gear (2). A drive-side gear (16) is rotatably connected to the crown wheel (15) of the crown wheel gear (3) and is driven by another planetary gear (4). The crown wheel gear and another planetary gear are housed in the gearbox housing (20). A pre-assembled unit (22) of another planetary gear is formed on the planet carrier (23) with planetary pinions (27). The ring gear (28) is positive-rotationally fixed in the gear box housing.