Robotic Arm Servo Reduction via Sliding Wrist Mechanism
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Solution Overview
Problem
The high cost of robotic arms using multiple servomotors makes them economically unfeasible for simple moving and swinging operations, such as machine loading and unloading, in factory settings.
Innovation Solution
A robotic arm design that reduces the number of servomotors by incorporating a driving device with a body member and an extension member, pivotally connected to the arm and wrist members, allowing for relative movement and swinging operations, along with a locating member, sliding member, stop member, and connector to achieve necessary movements with fewer motors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple servomotors are used to enable complicated actions, then the robotic arm can perform complex operations, but the manufacturing cost increases significantly
Solution Approach 1:
The robotic arm is divided into distinct functional modules: arm member for positioning, wrist member for orientation, and end-piece for gripping. Each module has dedicated pivot connection portions that enable specific movements. This segmentation allows the system to achieve complex operations through coordinated simple movements rather than requiring multiple servomotors at each joint.
Solution Approach 2:
The driving device with body member and extension member serves multiple functions: it provides both lifting motion through the sliding member's linear movement and swinging motion through the wrist member's pivotal connection. This multi-functionality reduces the total number of servomotors needed while maintaining operational versatility.
2Adaptability or versatility
If multiple servomotors are used to achieve complicated actions, then the robotic arm can perform complex operations, but the number of components increases
Solution Approach 1:
The body member and extension member are merged into a single driving device that coordinates multiple movements. The extension member's pivotal connection to both the arm member and wrist member allows it to simultaneously control positioning and orientation functions that would traditionally require separate servomotors.
Solution Approach 2:
The sliding member introduces a linear dimension of movement along the guiding groove, while the wrist member adds rotational dimension through pivotal connections. This combination of linear and rotational movements in different dimensions enables complex three-dimensional operations with fewer actuators.
3Ease of manufacture
If a robotic arm is designed for simple moving and swinging operations, then the manufacturing cost is reduced, but the operational capability is limited
Solution Approach 1:
The wrist member is designed with pivotal connections that allow dynamic adjustment of the end-piece orientation. The extension member can pivot relative to the arm member, enabling the wrist to adapt its position and angle dynamically during operation, thus achieving versatile movements with a simple structural design.
Solution Approach 2:
The connector serves as an intermediary between the sliding member and the wrist member, transferring and coordinating the movements from the linear sliding motion to the rotational wrist movements. This intermediary mechanism enables complex coordinated operations without requiring additional servomotors.
Data Source
AI summary
In order to reduce the cost of robotic arm, the invention provides a robotic arm, which includes an arm member having a first pivot connection portion, a locating member affixed to the arm member, a sliding member movably mounted at the locating member, a stop member affixed to the sliding member, a wrist member having a second pivot connection portion pivoted to the sliding member and a third pivot connection portion movable relative to the second pivot connection portion, and a driving device including a body member pivoted to the first pivot connection portion and an extension member pivoted to the third pivot connection portion of the wrist member and movable relative to the body member. Using the locating member, the sliding member, the stop member and the wrist member to match with the driving device, the robotic arm achieves the effect of moving and swinging and cost reduction.