| 摘要 |
A working tool in which a tip tool with a longitudinal shaft is linearly moved, wherein a motor and other tool constituting members are effectively cooled. In order to cool the inside of a motor-driven hammer comprising a main body, a motor, and a motion converter, the hammer is provided with a first cooling air passage through which a cooling air is supplied to the motor, and a second cooling air passage through which a cooling air is supplied to a hammer portion. To generate a cooling air to be supplied to the first and second cooling air passages, a cooling fan is provided at a lower portion of an output shaft of the motor and a hammer portion cooling fan is provided between the output shaft of the motor and the motion converter. |
| 主权项 |
1. A power tool, in which a predetermined elongate tool bit is linearly driven to perform a predetermined operation, comprising:
a tool body, a motor that is housed within the tool body and disposed such that an extension of a motor output shaft extends transversely to an axis of the tool bit, a striking part that is housed within a front region of the tool body and strikes the tool bit, a motion converting part that is disposed above the motor and converts an output of rotating a motor output shaft when the motor is driven, into an output of striking the tool bit by the striking part, a first cooling air passage that is provided within the tool body and through which cooling air can be led to the motor, a second cooling air passage that is provided within the tool body and through which cooling air can be led to the striking part, a motor cooling fan that is disposed below the motor and activated to supply cooling air to the first cooling air passage when the motor is driven, and a striking part cooling fan that is disposed between the motor and the motion converting part and activated to supply cooling air to the second cooling air passage when the motor is driven, wherein the first cooling air passage and the second cooling air passage are separated by a partition wall which is disposed within the tool body, the partition wall being disposed in an area formed between the motor and the motion converting part, the first cooling air passage communicates with a second inlet and a second outlet, and the second cooling air passage communicates with a first inlet which is separately arranged from the second inlet and a first outlet which is separately arranged from the second outlet, and the second outlet is disposed at a motor side with respect to the partition wall, and the first outlet is disposed at a motion converting part side with respect to the partition wall. |
