Robot Rotary Structure for Stable Arm Swing
Solution Overview
Problem
Robots with traditional arm structures exhibit complex swing mechanisms and poor transmission stability, limiting their operational effectiveness.
Innovation Solution
A robot design featuring a rotary structure with a fixing shaft, flange, and drive source, where the shoulder portion is rotatably connected to the fixing shaft through an adapter, utilizing a servo assembly and transmission mechanism to enhance stability and enable smooth arm movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional arm swing structure is used, then the robot can achieve basic arm movement, but the transmission stability deteriorates
Solution Approach 1:
The arm swing structure is segmented into multiple independent rotational joints (shoulder joint, elbow joint, wrist joint), each driven by separate servo motors. This segmentation allows each joint to be optimized independently for stability while reducing the complexity of the overall transmission system by distributing the motion control across multiple simple rotational axes rather than one complex swing mechanism.
Solution Approach 2:
The traditional mechanical swing structure is replaced with an electrical drive system using servo motors and rotary actuators. Each joint uses a rotary structure with a fixing shaft, flange, and bearing assembly driven by a servo motor, substituting complex mechanical linkages with simpler electro-mechanical rotational joints that provide better transmission stability and controllable motion.
2Reliability
If a rotary structure with adapter and drive source is implemented, then transmission stability improves, but device complexity increases
Solution Approach 1:
The adapter, fixing shaft, flange, and bearing components are merged into an integrated rotary structure assembly. The adapter includes an installation disc portion for connecting the shoulder portion, a drive portion for connecting the drive source, and a holding portion connecting these elements. This merging reduces the number of separate parts and simplifies the overall structure while maintaining high transmission stability through the unified rotary joint design.
Solution Approach 2:
The rotary structure with adapter is designed as a universal joint assembly that can accommodate different drive sources (servo motors, steppers) and connect to various arm configurations. The adapter's standardized interface with installation disc, drive portion, and holding portion allows it to serve multiple functions: mechanical coupling, rotational support via bearings, and drive transmission, making it applicable to multiple joints and configurations without redesign.
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
The design improves transmission stability and allows the arm to swing back and forth with respect to the robot head portion, enhancing overall operational stability and functionality.
Implementation Method 1
a flange rotatable installed to the fixing shaft through a first bearing
Implementation Method 2
a second bearing is disposed between the drive portion and the fixing shaft
Data Source
AI summary
A robot includes a head, a shoulder, and a rotary structure. The head includes a housing and a fixing frame. Connection assemblies are disposed between the housing anti the fixing frame. Each of the connection assemblies has a fixing shaft fixedly connected to the fixing frame and a flange rotatably installed to the fixing shaft, and the flange is fixedly connected to the housing. The rotary structure includes an adapter rotatably connecting the fixing shaft about an axis of the fixing shaft and a drive source rotating the adapter. The adapter has an installation disc portion for connecting the shoulder and a drive portion for connecting the drive source.