Punch apparatus
US9981299B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 4, 2014 |
| Grant date | May 29, 2018 |
| Priority date | — |
| Expiry date | Dec 19, 2034 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB26F1/14
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A punch apparatus includes a drive unit and a driving force transmission mechanism that transmits a driving force output by the drive unit to a rod. In the driving force transmission mechanism, a cam groove is formed in a cam block connected to a piston rod, and a rotating roller, which is pivotally supported on a displacement body connected to the rod, is inserted through the cam groove. The cam groove has a first groove portion and a second groove portion, which are inclined at predetermined angles of inclination with respect to the displacement direction of the cam block. When the rod is made to descend toward the workpiece, the rotating roller moves from the second groove portion into the first groove portion, which has a small angle of inclination, whereby the driving force transmitted to the rod is boosted.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.