Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
WORK TOOL
Document Type and Number:
WIPO Patent Application WO/2019/159819
Kind Code:
A1
Abstract:
This work tool comprises a planetary roller-type power transmission mechanism which transmits power in accordance with the backward movement of a spindle, wherein an improvement has been made for establishing stable frictional contact between a planetary roller and a drive surface. A power transmission mechanism 4 of a screwdriver 1 comprises a tapered sleeve 41, a gear sleeve 47, a retainer 43, and a roller 45. The tapered sleeve 41 and the gear sleeve 47 have tapered surfaces 411,475 respectively. The gear sleeve 47 is movable in an integral manner with a spindle 3 in the front-back direction relative to the tapered sleeve 41. The roller 45 is at least partially disposed between the tapered surfaces 411,475 in the radial direction relative to a drive axis A1. The screwdriver 1 includes a biasing spring 49 that restricts the roller 45 from moving in the front-back direction relative to a main housing 11.

Inventors:
IKUTA Hiroki (3-11-8 Sumiyoshi-cho, Anjo-sh, Aichi 02, 〒4468502, JP)
TOMINAGA Shogo (3-11-8 Sumiyoshi-cho, Anjo-sh, Aichi 02, 〒4468502, JP)
Application Number:
JP2019/004494
Publication Date:
August 22, 2019
Filing Date:
February 07, 2019
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
MAKITA CORPORATION (3-11-8, Sumiyoshi-cho Anjo-sh, Aichi 02, 〒4468502, JP)
International Classes:
B25B21/00
Foreign References:
JP2012135843A2012-07-19
JP2017087362A2017-05-25
JP2005014145A2005-01-20
Attorney, Agent or Firm:
IWATA Tetsuyuki et al. (Ikeda, Iwata & Partner 3F Hirokoji Center Place, 2-19-19 Nishiki, Naka-ku, Nagoya-sh, Aichi 03, 〒4600003, JP)
Download PDF: