Quick change mechanism for circular saw blades and other spinning disc devices
US4657428A · kind A · utility
Inventor
Key dates
| Filing date | Sep 10, 1985 |
| Grant date | Apr 14, 1987 |
| Priority date | — |
| Expiry date | Sep 10, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T403/7031
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
In one embodiment of this quick change mechanism, a narrow six spline hub is installed in the arbor hole of a circular saw blade or other disc tool heads such as grinders, sanders and buffers. This hub slides onto a matching splined drive shaft in which a narrow section of spline lands has been removed circumferentially to fit the width of the splined hub that is secured to the circular saw blade. A fifteen degree rotation of this splined blade hub on this shaft aligns all the lands and grooves, thus locking the hub relative the longitudinal axis of the drive shaft. To continue the locking, by locking the hub in rotation relative to the shaft, a splined sliding collar with spline land extensions, serving as locking fingers, is interposed into the spline grooves of the drive shaft and also the hub grooves. A blind longitudinal hole in the drive shaft contains a compression spring and an unthreaded bolt. A pin inserted through: a hole in the sliding collar; a longitudinal slot in the drive shaft; and a hole in the central bolt, insures the sliding collar will move with the central bolt. The shaft slot limits the fore and aft movement of the sliding collar during locking to that axial…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.