Speed Reducer Gear Support Layout for Reduced Axial Thickness
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing speed reducers face challenges in achieving a thinner main speed reduction unit due to the need to accommodate intricate mechanisms, which limits their axial size reduction.
Innovation Solution
The design supports the intermediate gear on a fixed block instead of the main speed reduction unit, allowing for a thinner configuration by eliminating the need for increased thickness and reducing the size of the bearing that supports the output gear, while a recess in the fixed block accommodates the intermediate gear without deepening the main speed reduction unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the intermediate gear is supported on the main speed reduction unit, then the gear mechanism can be integrated, but the axial thickness of the main speed reduction unit increases
Solution Approach 1:
The speed reducer is divided into two independent parts: the main speed reduction unit and the gear mechanism. The intermediate gear is supported on the carrier block of the gear mechanism rather than the main speed reduction unit, allowing each component to maintain its own compact structure while functioning together as a complete system.
Solution Approach 2:
The carrier block serves as an intermediary component that supports both the main speed reduction mechanism and the gear mechanism. By placing the intermediate gear on the carrier block, the patent creates a bridging structure that connects both mechanisms without requiring the main speed reduction unit to bear the additional thickness burden.
2Length of moving object
If the main speed reduction unit is made thinner, then the axial size is reduced, but it becomes difficult to accommodate the intermediate gear support structure
Solution Approach 1:
The support function for the intermediate gear is segregated from the main speed reduction unit and assigned to the carrier block. This segmentation allows the main speed reduction unit to be optimized for minimal axial thickness while the carrier block provides the necessary support structure for the gear mechanism.
3Device complexity
If the output gear is supported on one side only, then the structure is simpler, but rattling occurs due to insufficient stability
Solution Approach 1:
The output gear is provided with localized support features at both its axial ends. Specifically, the carrier block includes support surfaces at both ends that contact the output gear, creating localized stable contact points that prevent rattling while maintaining overall structural simplicity.
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
This configuration enables a more compact main speed reduction unit with reduced axial size and suppresses rattling by stabilizing the output gear on both sides, enhancing the overall efficiency and usability of the speed reducer.
Implementation Method 1
The main speed reduction mechanism includes a plurality of internal tooth pins on an inner circumference of the outer cylinder block and a pivot gear that pivots and revolves in the inside of the outer cylinder block. The external teeth are configured to engage with the plurality of internal tooth pins.
Implementation Method 2
The input rotor (eccentric shaft) rotatably supported at a position radially offset from the rotation center of the carrier block
Data Source
AI summary
A speed reducer according to the invention includes: a main speed reduction unit decelerating rotation from an input side and transmitting decelerated rotation to an output side; a fixed block coupled to the main speed reduction unit and rotatably supporting an input gear coupled to a rotary drive source; an output gear transmitting rotation of the input gear to an input side of the main speed reduction unit; and an intermediate gear meshing with the input gear and the output gear and rotatably supported by the fixed block.