Robot Reducer Mechanism for Compact Arm Design
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Solution Overview
Problem
Industrial robots with a motor and transmission mechanism located at the end of the first arm increase the lateral width, affecting the rotation of the second arm and leading to higher failure rates.
Innovation Solution
The use of a reducer mechanism within the transmission system, which includes a flexspline and rigid gear, allows for a more compact design by reducing the lateral width of the first arm and increasing its flexibility, while maintaining efficient rotation of the second arm through an output shaft.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the motor and transmission mechanism are located at the same end of the first arm, then the longitudinal length of the first arm is decreased, but the lateral width of the first arm increases, affecting the rotation of the second arm and increasing the failure rate
Solution Approach 1:
The patent relocates the transmission mechanism from a longitudinal arrangement to a lateral arrangement within the first arm. The reducer is positioned at the lateral width direction of the first arm, with the input shaft receiving power from the motor and the output shaft transmitting power to the second arm in a perpendicular dimension. This dimensional reorganization allows the motor and transmission mechanism to be integrated without increasing longitudinal length while avoiding interference with the second arm's rotation path.
Solution Approach 2:
The transmission mechanism is nested within the hollow cylindrical structure of the first arm. The reducer is housed inside the first arm's hollow space, with the input shaft connected to the motor and the output shaft extending to drive the second arm. This nesting approach consolidates multiple components (motor, reducer, transmission elements) within the existing structural envelope, eliminating the need to increase lateral width while maintaining compact longitudinal dimensions.
2Length of moving object
If the motor and transmission mechanism are located at the same end of the first arm, then the longitudinal length is decreased, but the lateral width increases, affecting rotation smoothness
Solution Approach 1:
The transmission mechanism is repositioned to operate in a lateral dimension perpendicular to the second arm's rotation plane. The reducer's output shaft extends laterally from the first arm to drive the second arm, separating the transmission path from the rotation path. This dimensional separation eliminates interference between the transmission mechanism and the rotating second arm, ensuring smooth rotation without mechanical obstruction.
Solution Approach 2:
The transmission mechanism is extracted from the traditional end-position arrangement and relocated to a lateral position within the first arm's hollow structure. By removing the transmission mechanism from the rotation path area and positioning it laterally, the patent eliminates the interference that would otherwise obstruct the second arm's rotation, thereby improving rotation smoothness while maintaining compact overall dimensions.
3Area of stationary object
If the lateral width of the first arm is increased to accommodate the motor and transmission mechanism, then the components can be housed, but it affects the rotation of the second arm
Solution Approach 1:
The motor and transmission mechanism are nested within the hollow cylindrical volume of the first arm rather than extending the lateral width. The reducer is housed inside the first arm's hollow space, utilizing the existing internal volume to accommodate all transmission components. This nesting approach eliminates the need to increase lateral width while preserving the second arm's full rotation capability, as the rotation path remains unobstructed.
Solution Approach 2:
The transmission mechanism is reoriented to operate in a lateral dimension perpendicular to the second arm's rotation plane. By positioning the reducer laterally within the first arm and having the output shaft extend perpendicular to the rotation axis, the patent accommodates all components within the existing lateral width while ensuring the second arm can rotate freely without interference from the transmission mechanism.
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 reduces the failure rate of the second arm by minimizing interference from tubings or cables and allowing for smoother rotation, thereby enhancing the overall mechanical reliability and flexibility of the robotic system.
Implementation Method 1
a first transmission mechanism (50) including a first drive wheel (52), a first transmission belt (54), a first action wheel (56), a transmission member (57), a reducer (58), and a connecting member (59)
Data Source
AI summary
A robot includes a base seat, a first arm fixed to the base seat, a second arm rotatably connected to the first arm, an output shaft rotatably connected to a distal end of the second arm, a first driving member, and a first transmission mechanism. The first transmission mechanism includes a first transmission belt and a reducer. The first driving member is located at one end of the first arm adjacent to the base seat, the reducer is located at the other end of the first arm away from the base seat, and connected to the second arm, the first driving member is capable of driving the reducer via the first transmission belt.