Workpiece Transfer Arm Motor Placement for Height Reduction
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Solution Overview
Problem
Conventional workpiece transfer apparatuses face challenges in transferring large workpieces at high speed due to a long power transmission path, which limits transfer efficiency and increases height, making it difficult to adapt for larger workpieces without compromising speed or height.
Innovation Solution
The workpiece transfer apparatus rearranges the hand driving mechanism by placing the motor within the first arm and extending the transmission mechanism through the interior of both arms, reducing the power transmission path length and height, while incorporating a speed reducer and pulley system to maintain stability and accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the motor size is increased to increase transfer speed, then the transfer speed increases, but the apparatus height increases
Solution Approach 1:
The patent redistributes the motor components from a vertical stacking arrangement to a horizontal distribution along the arm structure. The first motor is placed in the first arm and the second motor is placed in the second arm, utilizing the horizontal space within the articulated structure rather than increasing vertical height. This dimensional redistribution allows high-speed transfer capability without increasing the overall apparatus height.
2Area of moving object
If the power transmission path is lengthened to accommodate larger workpieces, then the workpiece size capacity increases, but the transfer speed decreases
Solution Approach 1:
The patent divides the power transmission system into two independent paths: one from the first motor through the first arm to the hand, and another from the second motor through the second arm to the hand. This segmentation allows each transmission path to be optimized independently, maintaining short transmission distances for high speed while accommodating larger workpieces through the articulated arm structure's extended reach.
3Device complexity
If the motor is placed in the elevation base to simplify structure, then the structural complexity is reduced, but the power transmission path becomes long
Solution Approach 1:
The patent transitions from a static motor placement in the elevation base to a dynamic configuration where motors are integrated into the movable arms. This allows the power source to move with the transmission path, maintaining a consistently short transmission distance regardless of the arm's position, thereby achieving both simplicity and short transmission path length.
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 enables high-speed and accurate transfer of large workpieces without increasing the apparatus's height, improving transfer efficiency and maintaining stability of the rotation element.
Implementation Method 1
a hand driving mechanism 6A, 6B for driving the hands 5A, 5B for rotation... each of the hand driving mechanisms 6A, 6B includes a motor 61a, 61b and a transmission mechanism 62a, 62b
Implementation Method 2
the transmission mechanism 62a, 62b includes a speed reducer 621a, 621b
Implementation Method 3
the transmission mechanism 62a, 62b includes pulleys 623a, 623b, 624a, 624b and endless belts 626a, 626b
Data Source
AI summary
A workpiece transfer apparatus includes a stationary base, an elevation base, first and second arms, a workpiece-holding hand, and a driving mechanism for the hand. The first arm is supported on the elevation base so as to be rotatable about a first vertical axis. The second arm is supported on the distal end of the first arm such that the second arm is rotatable about a second vertical axis. The hand is supported on the distal end of the second arm so as to be rotatable about a third vertical axis. A motor is arranged in the first arm, whereas a transmission is arranged to extend in a region from the interior of the first arm through the interior of the second arm.