公开(公告)号：US10919134B2

公开(公告)日：2021-02-16

申请号：US15117918

申请日：2015-02-23

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Hiroshi Miyazaki ,  Hiroyuki Tsubakimoto

IPC: B25B23/147 ,  B25B21/02

Abstract: An impact rotary tool comprises a driving source that is supplied with power from a battery pack and that rotates a hammer via a drive shaft, and a controlling unit that controls the driving source. The controlling unit controls the driving source so that the striking force is limited by PWM control when the battery pack voltage is high and the striking force is maintained even when the battery pack voltage decreases.

公开(公告)号：US10355538B2

公开(公告)日：2019-07-16

申请号：US15521034

申请日：2015-10-09

Applicant: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.

Inventor： Kota Kitamura ,  Hidenori Shimizu ,  Atsushi Takeyama ,  Motoharu Muto ,  Hiroyuki Tsubakimoto ,  Koichi Hashimoto

IPC: H02K1/14 ,  H02K1/18 ,  H02K5/04 ,  H02K7/14

Abstract: A brushless motor includes: a stator core having a cylindrical yoke portion and a teeth portion having a shape protruding from an inner circumferential surface of the yoke portion; and a rotor that is disposed inside the stator core, spaced apart from the teeth portion, and uses a center axis of the yoke portion as an axis of rotation. The yoke portion includes, on its outer circumferential surface, a notch portion at a position on the back side of the teeth portion. The notch portion has a circumferential width smaller than a circumferential width of the teeth portion.

公开(公告)号：US10279459B2

公开(公告)日：2019-05-07

申请号：US15454366

申请日：2017-03-09

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Hiroyuki Tsubakimoto ,  Hidenori Shimizu ,  Kenji Nakayama

IPC: B23B31/40 ,  B25B21/02 ,  B25B23/00

Abstract: A holding pin protrudes from a first opening of a through hole, enters a hole formed in a tip tool, and holds the tip tool. A spring member energizes the holding pin. A bush is press-fitted in the through hole and supports the spring member at a first end portion thereof. An inner diameter of a second opening of the through hole is formed larger than an outer diameter of the bush. As a result of this, a second end portion of the bush is arranged to avoid contact with the second opening of the through hole.