Mode changing mechanism for use in a hammer drill
US6192996A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 25, 2000 |
| Grant date | Feb 27, 2001 |
| Priority date | — |
| Expiry date | Aug 25, 2020 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB25D2216/0038
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A hammer drill (1) includes an intermediate shaft (13), a clutch ring (25), a second gear (20), and a boss (15) all mounted on the intermediate shaft (13). Also included are a rotatable change lever (40) and a clutch plate (31) which has lock claws (36). When the change lever (40) is fully rotated in the clockwise direction, the hammer drill (1) is placed in a drill-only mode where the clutch ring (25) meshes only with the second gear (20). When the change lever (40) is rotated approximately 45 degrees counterclockwise from the foregoing position, the hammer drill (1) is placed in a hammer drill mode, where the clutch ring (25) meshes with the second gear (20) and the boss (15). When the change lever (40) is rotated approximately another 45 degrees counterclockwise, the hammer drill (1) is placed in a neutral position where tile second gear (20) is disengaged from the clutch ring (25), with the clutch ring (25) remaining in mesh with the boss (15). When the change lever (40) is rotated another 45 degrees counterclockwise, the hammer drill (1) enters into a hammer-only mode where the second gear (20) meshes with, and is prevented from rotation by, the lock claws (36) of the clutch p…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.