Eccentric Oscillating Gear Mechanism Cable Protection
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Solution Overview
Problem
Eccentric oscillating gear mechanisms in industrial robots cause damage to cables and other members due to rubbing contact with a rotating cylindrical tube body, and require cumbersome mounting procedures, affecting working efficiency and safety.
Innovation Solution
The cylindrical tube body is supported rotatably on a carrier within the eccentric oscillating gear mechanism, with an engagement portion for a seal member to prevent damage and facilitate assembly, allowing the tube body to rotate with cables while being fixed without direct contact, eliminating the need for pre-installed tube bodies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the cylindrical tube body is fixed to the carrier, then the tube body rotates together with the carrier at low speeds, but the cables and other members are caused to rub against the rotating cylindrical tube body for a long period of time, resulting in damage to the cables and other members
Solution Approach 1:
The cylindrical tube body is changed from a fixed connection to a rotatable connection on the carrier. This allows the tube body to rotate independently along with the cables, eliminating the harmful rubbing contact between the fixed tube body and the moving cables, thereby resolving the contradiction between connection stability and cable protection.
2Strength
If the cylindrical tube body is inserted from the end plate portion side and fixed with bolts, then the tube body is securely mounted, but the robot has to be lifted to be suspended by a crane for installation, deteriorating working efficiency and safety
Solution Approach 1:
The cylindrical tube body is extracted from the heavy end plate portion and mounted separately on the lighter carrier. This allows the tube body to be installed independently using simpler methods without requiring crane suspension of the entire robot, thereby improving working efficiency and safety while maintaining secure mounting.
3Object-affected harmful factors
If the cylindrical tube body is fixed to the fixing portion, then the tube body does not rotate at all, eliminating rubbing contact with cables, but the cylindrical tube body has to be mounted on the robot side requiring preparation and mounting work by robot manufacturer
Solution Approach 1:
The carrier serves as an intermediary component that simplifies the mounting procedure. By mounting the cylindrical tube body on the carrier rather than directly on the robot fixing portion, the installation process is simplified and can be performed without complex preparation work by the robot manufacturer, while still preventing cable damage through the rotatable connection.
Data Source
AI summary
There is provided an eccentric oscillating gear mechanism including an internal gear, an external gear meshing with the internal gear, a crankshaft for moving the external gear eccentrically, and a carrier for supporting rotatably the crankshaft, the internal gear and the carrier being made to rotate relatively, wherein a cylindrical tube body, which penetrates the eccentric oscillating gear mechanism in an axial direction, is supported rotatably on the carrier.