Title:
POWER TOOL
Document Type and Number:
WIPO Patent Application WO/2012/081589
Kind Code:
A1
Abstract:
[Problem] To provide a power tool having a gear-shift mechanism that contributes towards improving the smoothness of a gear-shift operation. [Solution] A power tool in which a tip tool (113) is driven and predetermined machining work is performed, the power tool having an input shaft (131), an output shaft (133) for driving the tip tool (113), and a first transmission path (P1) and a second transmission path (P2) for transmitting the rotary force from the input shaft (131) to the output shaft (133). The power tool is configured so that in a case in which the input shaft (131) is caused to rotate in a first direction, the rotary force in the first direction is transmitted via a first transmission path (P1) to the output shaft (133) at a predetermined transmission ratio; and in a case in which the input shaft (131) is caused to rotate in a second direction that is opposite to the first direction, the rotary force in the second direction is transmitted via a second transmission path (P2) to the output shaft (133) at a transmission ratio that is different from the transmission ratio of the first transmission path (P1). Switching the direction of rotation of the input shaft (131) causes the rotation speed of the output shaft (133) to switch while the direction of rotation of the output shaft is maintained.
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Inventors:
ITO SHUSUKE (JP)
Application Number:
PCT/JP2011/078830
Publication Date:
June 21, 2012
Filing Date:
December 13, 2011
Export Citation:
Assignee:
MAKITA CORP (JP)
ITO SHUSUKE (JP)
ITO SHUSUKE (JP)
International Classes:
B25F5/00; B24B27/06; F16H1/06; F16H3/093; F16H3/10
Foreign References:
| JPS50109358A | 1975-08-28 | |||
| JPH04251702A | 1992-09-08 | |||
| JPH1190845A | 1999-04-06 | |||
| JPH10103462A | 1998-04-21 |
Attorney, Agent or Firm:
IWATA Tetsuyuki et al. (JP)
Tetsuyuki Iwata (JP)
Tetsuyuki Iwata (JP)
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Claims: