Impact rotary tool

Patent metadata

Field	Value
Publication number	US-2023398674-A1
Application number	US-202318324769-A
Country	US
Kind code	A1
Filing date	May 26, 2023
Priority date	Jun 8, 2022
Publication date	Dec 14, 2023
Grant date	—

Abstract

An impact rotary tool includes a hammer, an anvil, an output shaft, a housing, and a bearing (first bearing). The bearing (first bearing) is held by the housing. The anvil includes a first contact portion. The output shaft includes a second contact portion. The second contact portion receives, from the first contact portion, force that causes the output shaft to rotate. The bearing (first bearing) is in contact with at least one of the first contact portion or the second contact portion and supports at least one of the output shaft or the anvil rotatably.

First claim

1 . An impact rotary tool comprising:
a hammer configured to rotate upon receiving motive power from a motor; an anvil configured to rotate upon receiving, from the hammer, impacting force in a rotational direction of the hammer; an output shaft configured to hold a tip tool thereon and rotate along with the anvil upon receiving, from the anvil, force in a rotational direction of the anvil; a housing that houses the hammer and the anvil; and a bearing held by the housing, the anvil including a first contact portion arranged in contact with the output shaft; the output shaft including a second contact portion arranged in contact with the first contact portion to receive, from the first contact portion, force that causes the output shaft to rotate, and the bearing being in contact with at least one of the first contact portion or the second contact portion and supporting at least one of the output shaft or the anvil rotatably.

2 . The impact rotary tool of claim 1 , wherein
the bearing is a needle bearing.

3 . The impact rotary tool of claim 1 , further comprising a buffer member including an elastic member configured to be elastically deformed in a thrusting direction aligned with a rotational axis of the output shaft, wherein
the buffer member is interposed between the anvil and the output shaft to regulate a gap distance between the anvil and the output shaft.

4 . The impact rotary tool of claim 1 , further comprising a second bearing separately from a first bearing serving as the bearing, wherein
the second bearing supports the output shaft rotatably.

5 . The impact rotary tool of claim 1 , wherein
the anvil further includes an anvil body, the first contact portion protrudes from the anvil body in a thrusting direction aligned with a rotational axis of the output shaft, the output shaft further includes an output shaft body, and the second contact portion protrudes from the output shaft body in the thrusting direction.

6 . The impact rotary tool of claim 5 , wherein
the bearing is in contact with the anvil body.

7 . The impact rotary tool of claim 5 , wherein
the bearing is in contact with the output shaft body.

8 . The impact rotary tool of claim 1 , wherein
the bearing is in contact with the first contact portion and the second contact portion and supports the output shaft and the anvil rotatably.

Assignees

• Panasonic Ip Man Co Ltd

Inventors

• Sato Masaya
• Ozawa Kimitaka
• Kusagawa Takashi
• Honda Akiko
• Ueda Takahiro

Classifications

• B25D17/24 Primary

  Damping the reaction force {(resiliently mounted handles B25D17/043; dampers in connections of hammers to backhoes E02F3/966)} · CPC title

• B25B21/02

  with means for imparting impact to screwdriver blade or nut socket · CPC title

• B25D17/11

  Arrangements of noise-damping means {(noise damping in general G10K11/16)} · CPC title

• B25D2250/331

  Use of bearings · CPC title

• B25B21/023 Primary

  for imparting an axial impact, e.g. for self-tapping screws · CPC title