| 摘要 |
PURPOSE: To provide a vibration damped hand held rotary grinding machine in which vibration transmitted through an output shaft to a housing of the grinding machine can be effectively offset. CONSTITUTION: This machine comprises a housing 10, a rotation motor 11, an output shaft drivingly connected to the motor 11 and having a mounting means 14 for a grinding wheel 15, two handles 17, 18 rigidly mounted on the housing 10 and extending perpendicularly to the output shaft and to each other, and a sector-shaped non-resilient safe guard 19 which is rigidly attached to the housing 10 and partially surrounding the grinding wheel 15. The safe guard 19 has an arc-shaped rim part 20 partially surrounding circumferential edges of the grinding wheel 15. Vibration damping inertia elements 22, 23, 24 are rigidly attached to the safe guard 19 rim part 20 and to outer end parts of the handles 17, 18 in such a way that vibration is absorbed since inertia moment of the machine is substantially increased. |
