Multi-joint Arm Probe Rotation Holding Mechanism
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Solution Overview
Problem
The existing multi-joint arm type measurement apparatus faces challenges in high-precision measurement due to the relative position uncertainty between the contact and non-contact probes, leading to difficulties in aligning the workpiece and maintaining stability during extended measurements, especially when the arm needs to be raised high.
Innovation Solution
A probe rotation holding mechanism, such as a ratchet mechanism or rotary encoder, is employed to fix the rotating position of the non-contact probe relative to the contact probe at multiple positions, allowing for adjustable alignment and preventing probe rotation during measurement, thereby enhancing usability and precision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the laser probe is fixed to the arm head via screw fastening, then the relative position is uniquely determined, but the workpiece cannot be seen well and the arm must be raised high for lateral illumination
Solution Approach 1:
The patent applies the dynamics principle by making the laser probe rotatable around the contact probe through a probe rotation holding mechanism. This allows the operator to dynamically adjust the illumination direction to suit different measurement scenarios, eliminating the need for fixed screw fastening and high arm positioning while maintaining measurement precision.
2Adaptability or versatility
If the optical probe is configured to be relatively rotatable around the contact probe, then the positioning flexibility is improved, but the rotation position is not restrained and high-precision measurement cannot be performed
Solution Approach 1:
The patent introduces a probe rotation holding mechanism as an intermediary between the contact probe and laser probe. This mechanism includes a rotation restricting mechanism that acts as a mediator to control and restrain the rotation position, allowing flexibility when needed while preventing unwanted rotation during measurement to maintain precision.
3Use of energy by moving object
If the arm is raised high for lateral illumination, then the laser can illuminate the workpiece, but it is difficult to perform measurement for a long time
Solution Approach 1:
The patent applies dynamics by enabling the laser probe to rotate around the contact probe, allowing the operator to position the laser at optimal angles without raising the entire arm high. This reduces physical strain and enables longer measurement durations while maintaining illumination capability.
Data Source
AI summary
A multi-joint arm type measurement apparatus includes a plurality of probes mounted at a tip of a multi-joint mechanism, and a probe rotation holding mechanism configured to rotatably hold the other probe around one probe and to fix a rotating position of the other probe at a plurality of positions.