Title:
ROTARY IMPACT TOOL
Document Type and Number:
WIPO Patent Application WO/2018/142742
Kind Code:
A1
Abstract:
In a rotary impact tool 1, a sub-hammer support structure has a structure in which a plurality of steel balls 17 are disposed between a sub-hammer 21 and a carrier 16. The plurality of steel balls 17 are disposed between a first retention groove 21g of the sub-hammer 21 and a second retention groove 16a of the carrier 16 so as to receive the loads in a direction different from the rotational-axis direction and radial directions perpendicular to the rotational-axis direction. The first retention groove 21g and the second retention groove 16a are formed into an arc shape in cross section in the rotational-axis direction, and cross-sectional radii thereof are larger than the steel balls 17.
Inventors:
KUSAGAWA TAKASHI
MURAMATSU MASARI
MURAMATSU MASARI
Application Number:
PCT/JP2017/043087
Publication Date:
August 09, 2018
Filing Date:
November 30, 2017
Export Citation:
Assignee:
PANASONIC IP MAN CO LTD (JP)
International Classes:
B25B21/02
Foreign References:
| JP2014240108A | 2014-12-25 | |||
| JP2010280021A | 2010-12-16 | |||
| US3001429A | 1961-09-26 | |||
| GB763116A | 1956-12-05 |
Attorney, Agent or Firm:
MORISHITA Sakaki (JP)
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