Title:
電動工具
Document Type and Number:
Japanese Patent JP4557555
Kind Code:
B2
Abstract:
It is accordingly an object of the invention to provide a technique of cooling a power tool which further improves cooling effectiveness of the power tool. According to the invention, a power tool (101) is provided that includes a driving motor (105), a tool bit, a power transmitting mechanism, a tool body (103) and a cooling fan (217). The power tool further includes first (229) and second (231,233) cooling air passages. The first cooling air passage is disposed within the tool body and flows cooling air into the tool body by using the cooling fan. The second cooling air passage is provided within the tool body and takes outside air into the tool body by using the flow of the cooling air through the first cooling air passage. The cooling air within the first cooling air passage can be cooled by mixing outside air taken into the tool body via the second cooling air passage and therefore, the cooling air can further effectively cool components within the power tool. As a result, cooling effectiveness of the power tool can be improved.
Inventors:
Fuminen Numata
Ryo Sunatsuka
Ryo Sunatsuka
Application Number:
JP2004003362A
Publication Date:
October 06, 2010
Filing Date:
January 08, 2004
Export Citation:
Assignee:
Makita Corporation
International Classes:
B25F5/00; B24B23/02; B25F5/02
Domestic Patent References:
| JP2001009757A | ||||
| JP11089157A | ||||
| JP11129169A | ||||
| JP9011157A |
Foreign References:
| US20040263008 |
Attorney, Agent or Firm:
Tetsuyuki Iwata
Toshiyuki Ikeda
Toshiyuki Ikeda