Robot Rotation Coupling for Bolt-Free Speed Reducer Assembly
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Solution Overview
Problem
The assembly and disassembly of speed reducers in multi-joint cooperative robots are complicated due to the use of resin materials, which can compromise the strength of bolted connections, making it difficult to simplify the process.
Innovation Solution
A rotation mechanism that uses a coupling member with elastic deformation and a snap-fit structure, eliminating the need for bolts, allowing for efficient assembly and disassembly by coupling the mating member and output portion through elastic deformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If resin materials are used for speed reducers to reduce size and weight, then the size and weight are reduced, but the assembly process becomes complicated due to insufficient strength for bolted connections
Solution Approach 1:
The patent replaces the traditional bolted mechanical connection system with an interference fit system. The coupling member is pressed into the through hole of the resin speed reducer, creating a friction-based mechanical connection that eliminates the need for bolts while providing sufficient strength for resin materials.
Solution Approach 2:
The patent applies local quality enhancement by creating a press-fit interface between the coupling member and the through hole. The interference fit concentrates the connection strength at the localized contact surfaces, allowing the resin speed reducer to achieve adequate connection strength without requiring complex assembly procedures throughout the entire structure.
2Weight of moving object
If resin materials are used for speed reducers to reduce size and weight, then the size and weight are reduced, but the assembly and disassembly work becomes time-consuming
Solution Approach 1:
The patent replaces the multi-step bolted connection system with a single-step press-fit operation. The coupling member is simply pressed into the through hole, eliminating the need for multiple bolts, nuts, and fastening operations, thereby dramatically reducing assembly and disassembly time.
3Strength
If traditional bolted connections are used to ensure connection strength, then the connection strength is sufficient, but the assembly process becomes complicated and time-consuming
Solution Approach 1:
The patent substitutes the bolted connection system with an interference fit system. The press-fit connection between the coupling member and the through hole generates sufficient frictional force and mechanical interlocking to provide connection strength comparable to or exceeding traditional bolted connections, while eliminating the complexity of multiple fastening components and operations.
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 improves work efficiency by simplifying the assembly and disassembly process without compromising torque transmission, enabling a more stable and efficient operation of the speed reducing mechanisms.
Implementation Method 1
a coupling member for coupling the mating member and the output portion by elastic deformation; an elastic deformation portion extending in an axial direction along the axis and capable of elastic deformation in a radial direction intersecting the axial direction
Data Source
AI summary
A rotation mechanism according to the disclosure includes: an output portion for outputting, to a mating member, rotation of a drive source producing a rotational force; a coupling member for coupling the mating member and the output portion by elastic deformation; and an anti-rotation portion for preventing relative rotation between the mating member and the output portion.