Robot arm for an industrial robot
US4904148A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 20, 1988 |
| Grant date | Feb 27, 1990 |
| Priority date | — |
| Expiry date | Jul 20, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/20207
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A robot arm usable for an industrial robot adapted to freely bend to realize a pattern of movement having a high ability of movement, excellent reachability and high accuracy by virtue of a comparatively small amount of rotational movement and a comparatively large amount of translational movement. The robot arm has cylindrical arm portions (14, 15, 16) flexibly connected to one after another via joints, and the arm portions comprise one upper arm (14), at least one intermediate arm (15) and one lower arm (16). An arm portion which belongs to a certain joint is formed with joint faces (21) which are inclined with respect to a longitudinally extending axis (29). A joint axis (22) of this joint extends at a right angle with respect to each of the joint faces (21). Each of the arm portions is freely turnable about the joint axis (22) independently of adjacent one or plural arm portions. Additionally, inclined joint faces located at opposite ends of the intermediate arm are formed in such a manner that their extensions intersect one another at a position located outwardly of the outer boundary of the intermediate arm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.