Title:
IMPACT WORK MACHINE
Document Type and Number:
WIPO Patent Application WO/2017/169393
Kind Code:
A1
Abstract:
Provided is an impact work machine configured so as to suppress the leakage of a lubricant within a casing to the outside thereof. An impact work machine (10) has: a piston reciprocated by the power of an electric motor; a casing for supporting the piston; and a pressure chamber provided within the casing and generating impact force by operation of the piston. The impact work machine (10) also has: an air chamber (56) separated from the pressure chamber by the piston and provided within a crankcase (18); an air flow opening (57) open to the air chamber (56) and connected to the outside of the crankcase (18); and a restriction member (60) capable of vibrating relative to the crankcase (18) and restricting the leakage of a lubricant to the outside of the crankcase (18) through the air flow opening (57), the lubricant having been filled into the air chamber (56).
Inventors:
ABE SATOSHI (JP)
WAKITA KOHEI (JP)
WAKITA KOHEI (JP)
Application Number:
PCT/JP2017/007130
Publication Date:
October 05, 2017
Filing Date:
February 24, 2017
Export Citation:
Assignee:
HITACHI KOKI KK (JP)
International Classes:
B25D17/26; B25D11/12
Foreign References:
| JPS606367A | 1985-01-14 | |||
| JP2008284655A | 2008-11-27 | |||
| JP2013078822A | 2013-05-02 | |||
| JP2011031363A | 2011-02-17 | |||
| JPS63118454U | 1988-07-30 | |||
| EP0589337A1 | 1994-03-30 |
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