Robot Arm Articulated Joint Compact Transition Region
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Solution Overview
Problem
Existing robot designs suffer from reduced performance and agility due to a large distance between rolling and articulated joints, which also compromises the rigidity and strength of the robot arm, and attempts to shorten this distance often result in material cross-section issues.
Innovation Solution
A robot arm design featuring limbs connected via articulated and rolling joints with a curved transition region that extends at a small radial distance from the joint, allowing for a compact and stable structure with high performance, and includes a peripheral edge that crosses the parting line between joint portions at a specific angle, maintaining constant radial distance and preventing finger pinching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If the distance between rolling joint and articulated joint is reduced, then robot compactness and rigidity are improved, but the material cross-section becomes small affecting strength
Solution Approach 1:
The transition region extends the peripheral edge from the joint portion at a radial distance of less than 25 mm, creating a three-dimensional configuration that resolves the contradiction by utilizing spatial arrangement in multiple dimensions rather than simply increasing linear distance
2Length of stationary object
If the distance between rolling joint and articulated joint is reduced, then overall robot length is shortened improving rigidity, but performance and agility are compromised
Solution Approach 1:
The curved transition region with oblique peripheral edge configuration enables dynamic optimization of the joint structure, allowing the robot to achieve both compactness and agility through optimized geometric parameters rather than simply reducing dimensions
3Volume of moving object
If transition region extends close to other joint portion, then compactness is improved, but safety risks arise from finger pinching
Solution Approach 1:
The oblique extension of the peripheral edge at a controlled radial distance transforms the potential pinching hazard into a beneficial design feature by creating a safe geometric configuration that maintains compactness while preventing finger access to dangerous zones
Data Source
AI summary
The invention relates to a robot arm having at least two limbs (2), which are connected to one another at their ends via an articulated joint (10) so that they can be pivoted relative to one another about a rotation axis (A), the two limbs (2) each comprising at least one joint portion (3) and a transition region (4) adjoined thereto and each extending in a longitudinal direction (L). According to the invention, the transition region (4) of at least one of the limbs (2, 2a) has a circumferential edge (6) which, when viewed from a direction running transverse to the rotation axis (A) and transverse to the longitudinal direction (L), crosses a parting line (9) between the two joint portions (3) and runs at a predefined distance radially outside the joint portion (3) of the other limb (2), the circumferential edge (6) running at a distance, in relation to the rotation axis (A), of less than 25 mm outside the surface of the joint portion (3) of the other limb (2) arranged beneath. In addition, a portion of the circumferential edge (6) extends obliquely to the rotation axis (A) when viewed from a direction running transverse to the rotation axis (A) and transverse to the longitudinal direction (L).