Robot Gear Shim Structure for Backlash Adjustment Without Disassembly
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Solution Overview
Problem
Existing gear mechanisms in robots require complex and time-consuming processes to adjust the backlash between ring and pinion gears, involving repeated assembly and disassembly, which is inefficient and prone to errors.
Innovation Solution
A gear mechanism with a second gear shim that allows for adjustable positioning of the pinion gear without releasing the meshing with the ring gear, using a U-shaped shim with a through hole and a path for the holder to pass through, enabling precise adjustment of backlash without disassembling the gear set.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If shims are placed over the entire circumference of the gear with a through hole for inserting a shaft, then the gear inclination is prevented, but the adjustment process becomes complex and time-consuming requiring repeated assembly and disassembly
Solution Approach 1:
The shim is divided into two functional parts: a through hole for shaft insertion (providing stability) and a path extending from the outer circumference to the through hole (enabling adjustment). This segmentation allows the shim to simultaneously prevent gear inclination while simplifying the adjustment process by enabling access without complete disassembly.
Solution Approach 2:
The path in the shim acts as an intermediary access route that allows the holder to be inserted or removed without taking out the entire gear set. This intermediary structure enables adjustment while maintaining the gear mesh, reducing adjustment complexity while preserving stability.
2Stability of the object's composition
If the holder is securely attached to the gearbox, then the second gear is stably supported, but the shim cannot be easily accessed for adjustment
Solution Approach 1:
The shim structure is segmented to include a path that provides access to the holder while maintaining secure attachment. The path allows the holder to be inserted or removed through the shim without requiring complete disassembly of the gear support structure, thus maintaining stability while improving accessibility.
Solution Approach 2:
The path in the shim creates a new dimensional access route that allows the holder to be inserted or removed without disturbing the overall gear support structure. This dimensional approach enables adjustment while preserving the stable attachment of the holder to the gearbox.
3Manufacturing precision
If the gear mesh is released for adjustment, then the backlash can be adjusted, but the adjustment process becomes time-consuming and error-prone
Solution Approach 1:
The path in the shim serves as an intermediary access route that allows the holder to be adjusted without releasing the gear mesh. This enables precise backlash adjustment while avoiding the time-consuming and error-prone process of complete disassembly and reassembly.
Solution Approach 2:
The shim with the path is pre-configured to allow holder adjustment without gear mesh release. This preliminary design enables direct adjustment of backlash while maintaining gear engagement, eliminating the need for time-consuming disassembly and reassembly operations.
Data Source
AI summary
A gear mechanism including a rotatably supported first gear, a second gear meshed with the first gear, the second gear rotatably supported around a second axis line and having a smaller conical angle than the first gear, a holder which supports the second gear in a rotatable manner with a bearing, and a shim for the second gear which is placed at a position between the holder and a gearbox and which can adjust a position of the second gear in the direction along the second axis line. The second gear shim includes a through hole in which the holder is located so that the holder penetrates the second gear shim, and a path which extends from an outer circumference edge of the second gear shim to the through hole, where the path allows the holder to pass in a direction crossing the second axis line.