Nested Three-Axis Robot Structure for Compact Orthogonal Motion
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Solution Overview
Problem
Conventional three-axis robots have a non-compact orthogonal structure that occupies a large space.
Innovation Solution
A three-axis robot design with a compact structure is achieved by arranging the first driver on the base plate, the second driver on the first slider, and the third driver on the second slider, utilizing guiding units and drivers to enable independent movement along three perpendicular directions, with each driver comprising a motor, screw, screw nut, and bearing seat, and incorporating accommodating cavities to reduce space occupation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If three single-axis robots or three single axis motion modules are directly assembled to form an orthogonal three-axis structure, then the robot can achieve three-axis movement, but the structure is not compact and occupies a large space
Solution Approach 1:
The patent implements nesting by placing the second driver and second guiding unit inside the first slider, and the third driver and third guiding unit inside the second slider. This nested arrangement allows the three-axis robot to achieve compact structure and reduced space occupation while maintaining the orthogonal movement capability along three perpendicular directions
2Volume of moving object
If drivers and guiding units are arranged in a nested manner, then the robot becomes more compact, but the structural complexity increases
Solution Approach 1:
The patent divides the three-axis robot into three independent modular units (first driver with first slider, second driver with second slider, third driver with third slider), each capable of independent movement along one perpendicular direction. This segmentation allows for easier manufacturing, assembly, and maintenance while achieving compact nested structure
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 results in a more compact and rigid three-axis robot that occupies less space while maintaining precise and stable movement along three axes.
Implementation Method 1
the first driving motor is fixed to the first fixing seat, an output shaft of the first driving motor is connected to the first driving screw through the first coupling, the first driving screw is rotationally supported by the first bearing seat, the first screw nut is in threaded fitting with the first driving screw, and the first slider is fixedly connected to the first screw nut
Implementation Method 2
the second driving motor is fixed on the first slider, an output shaft of the second driving motor is connected to the second driving screw through the second coupling, the second driving screw is rotationally supported by the second bearing seat, the second screw nut is in threaded fitting with the second driving screw, and the second slider is fixedly connected to the second screw nut
Implementation Method 3
the third driver includes a third driving motor provided on the second slider, a third driving screw, a third screw nut, a third bearing seat and a third coupling. An output shaft of the third driving motor is connected to the third driving screw through the third coupling, the third driving screw is rotationally supported by the third bearing seat, the third screw nut is in threaded fitting with the third driving screw
Data Source
AI summary
Provided is a three-axis robot including a base plate, a first guiding unit extending along first direction, a first slider, a first driver driving the first slider to move along first direction, a second guiding unit extending along second direction, a second slider, a second driver driving the second slider to move along second direction, a third guiding unit extending along third direction, and the first, second and third directions are perpendicular to each other, a third slider, and a third driver driving the third slider to move along third direction. The first guiding unit and the first driver are provided on the base plate, the second guiding unit and the second driver are provided on the first slider, and the third guiding unit and the third driver are provided on the second slider, so that the three-axis robot has compact structure, improved rigidity and occupies less space.