公开(公告)号：US09841066B2

公开(公告)日：2017-12-12

申请号：US14080260

申请日：2013-11-14

Applicant: MAKITA CORPORATION

Inventor： Kiyonobu Yoshikane ,  Kenji Shibata ,  Yoshitaka Machida

IPC: F16D21/00 ,  B25D16/00

CPC classification number: F16D21/00 ,  B25D16/003 ,  B25D2216/0015 ,  B25D2216/0023 ,  B25D2216/0038 ,  B25D2216/0084 ,  B25D2250/371

Abstract: In a hammer drill, a coil spring that urges a first clutch and a second clutch in directions away from each other is held between a first change plate that engages with the first clutch to be slidable in the axial direction of an intermediate shaft and a second change plate that engages with the second clutch to be slidable in the axial direction of the intermediate shaft. The first change plate is slidably guided by a gear housing.

公开(公告)号：US12246428B2

公开(公告)日：2025-03-11

申请号：US17701074

申请日：2022-03-22

Applicant: MAKITA CORPORATION

Inventor： Kiyonobu Yoshikane ,  Mizuki Yamamoto

IPC: B25D17/08

Abstract: Two balls can reliably retract for smooth insertion of a tip tool into a tool holder. A hammer drill includes a tool holder, two balls in reception holes in the tool holder, a guide washer urging the balls forward in the reception holes with a coil spring, a pressure ring adjacent to a front of the guide washer, and an operation sleeve allowing the pressure ring to move backward and forward between locked and unlocked positions of the two balls. The guide washer includes, on its front surface, a projection toward the pressure ring to cause, with the pressure ring at the locked position, the guide washer to be inclined with respect to an axis of the tool holder for a first ball to move more backward than a second ball.

公开(公告)号：US12109634B2

公开(公告)日：2024-10-08

申请号：US17752360

申请日：2022-05-24

Applicant: MAKITA CORPORATION

Inventor： Kiyonobu Yoshikane ,  Yoshitaka Machida ,  Kazuki Nakagawa

IPC: B23B45/02 ,  B25F5/00 ,  F16D55/02

CPC classification number: B23B45/02 ,  B25F5/008 ,  F16D55/025 ,  B23B2260/122

Abstract: A power tool comprises a motor, a final output shaft, a tool body, a detection device, and a braking device. The motor has a motor body including a stator and a rotor, and a motor shaft extending from the rotor and being rotatable around a first rotational axis. The final output shaft is configured to be rotationally driven around a second rotational axis by torque transmitted from the motor shaft. The tool body houses the motor and the final output shaft. The detection device is configured to detect a locking state of the final output shaft. The braking device is configured to directly act on the motor shaft to brake the motor shaft in response to detection of the locking state.

公开(公告)号：US12090617B2

公开(公告)日：2024-09-17

申请号：US18103507

申请日：2023-01-31

Applicant: MAKITA CORPORATION

Inventor： Kiyonobu Yoshikane ,  Hajime Takeuchi ,  Yoshiro Tada ,  Masanori Furusawa ,  Masao Miwa ,  Shinji Onoda ,  Yoshitaka Machida

IPC: B25D16/00 ,  B25D17/00 ,  B25F5/02

CPC classification number: B25D16/00 ,  B25F5/02

Abstract: A power tool, such as a hammer drill (100), has first and second battery mount parts (160A, 160B) that are aligned in a longitudinal direction of the power tool. First and second batteries (170A, 170B) are mountable thereon in series along a straight line that extends in the longitudinal direction. The first battery (170A) is mounted on the first battery mount part (160A) by sliding along the straight line towards the second battery mount part (160B). The second battery (170B) is mounted on the second battery mount part (170B) by sliding along the straight line towards the first battery mount part (170A).

公开(公告)号：US11883941B2

公开(公告)日：2024-01-30

申请号：US17569668

申请日：2022-01-06

Applicant: MAKITA CORPORATION

Inventor： Yoshitaka Machida ,  Kiyonobu Yoshikane

IPC: B25D17/20 ,  B25D16/00 ,  B25D17/08

CPC classification number: B25D17/20 ,  B25D16/006 ,  B25D17/084 ,  B25D2250/121 ,  B25D2250/335 ,  B25D2250/365

Abstract: A hammer drill includes a housing inside which a motor, a tubular tool holder, a driving mechanism, a rotation conversion member, and an inner housing are disposed. The driving mechanism is configured to perform at least one of rotation actuation of the tool holder and hammering actuation of a bit. The inner housing supports the driving mechanism, supports the tool holder via a first bearing, and supports an output shaft via a second bearing. The inner housing is divided into a front housing holding the first bearing and a rear housing that is formed in a separate body from the front housing and holds the second bearing. The inner housing is formed by connecting the front housing to the rear housing in an axis line direction of the tool holder. A seal member sealing outside space of the inner housing inside the housing is disposed in the front housing.

公开(公告)号：US11865688B2

公开(公告)日：2024-01-09

申请号：US17567970

申请日：2022-01-04

Applicant: MAKITA CORPORATION

Inventor： Yoshitaka Machida ,  Kiyonobu Yoshikane

IPC: B25D16/00 ,  B25D9/00 ,  B25D17/20

CPC classification number: B25D16/006 ,  B25D16/003 ,  B25D9/00 ,  B25D17/20 ,  B25D2216/0084 ,  B25D2250/181 ,  B25D2250/331 ,  B25D2250/365

Abstract: An impact tool includes a housing; and a motor, a tubular tool holder, a driving mechanism, a rotation shaft, a driving mechanism housing region inside the housing. The tool holder has a distal end on which a bit is mountable. The driving mechanism is configured to hammer the bit. The rotation shaft is disposed in the driving mechanism and rotates by a rotation of an output shaft of the motor. The driving mechanism housing region houses the driving mechanism in a sealed state inside the housing. The air escape path that releases air inside the driving mechanism housing region to outside of the driving mechanism housing region is formed inside the rotation shaft while an inlet of the air escape path is formed on an outer peripheral surface of the rotation shaft.

公开(公告)号：US11529724B2

公开(公告)日：2022-12-20

申请号：US16809636

申请日：2020-03-05

Applicant: MAKITA CORPORATION

Inventor： Kiyonobu Yoshikane ,  Mizuki Yamamoto

IPC: B25D11/04 ,  B25D11/06

Abstract: A striking tool restricting movement of an intermediate member toward a striker reliably prevents no-load strokes. A hammer drill includes a cylindrical tool holder holding a tip tool, a motor, a piston that reciprocate with rotation from the motor, a striker that reciprocate in cooperation with the piston, an intermediate member reciprocably accommodated in the tool holder between the striker and the tip tool and in contact with a rear end of the tip tool at a normal strike to indirectly transmit a strike from the striker to the tip tool, and at least two ring members that move in a front-rear direction accommodated in the tool holder at a front of the intermediate member between the tool holder and the intermediate member. At least one ring member is made of metal.

公开(公告)号：US10987792B2

公开(公告)日：2021-04-27

申请号：US16289004

申请日：2019-02-28

Applicant: MAKITA CORPORATION

Inventor： Kiyonobu Yoshikane ,  Yoshiro Tada ,  Mizuki Yamamoto

IPC: B25D17/24 ,  B25D11/06 ,  B25D11/04

Abstract: An impact tool includes a tubular tool holder, a hammering mechanism, a resistor, and a biasing member. An impact element moves forward and rearward in conjunction with a piston. An intermediate element is housed movable back and forth between the impact element and a tip tool. The intermediate element abuts on a rear end of the tip tool to indirectly transmit a striking force from the impact element to the tip tool in a normal striking. The resistor is configured to abut on at least one of the intermediate element and the tip tool to apply a resistance to a front-rear movement of at least one of the intermediate element and the tip tool in a non-striking state. The biasing member disposed on the tool holder biases the resistor to a side of at least one of the intermediate element and the tip tool.

公开(公告)号：US10513022B2

公开(公告)日：2019-12-24

申请号：US15526450

申请日：2015-11-11

Applicant: MAKITA CORPORATION

Inventor： Yoshitaka Machida ,  Kiyonobu Yoshikane

IPC: B25D17/24 ,  B25D11/06 ,  B25D11/00 ,  B25D17/04

Abstract: An impact tool has a body and a striking mechanism that drives a tool accessory in a prescribed longitudinal direction. The body has a first body element on which the striking mechanism is provided, and a second body element. The first body element and the second body element are connected via a cushioning mechanism. A vibration reducing mechanism is provided on the first body element.

公开(公告)号：US10507556B2

公开(公告)日：2019-12-17

申请号：US15408742

申请日：2017-01-18

Applicant: MAKITA CORPORATION

Inventor： Yoshitaka Machida ,  Kiyonobu Yoshikane

IPC: B23B47/34 ,  B23B45/00 ,  B23Q1/00 ,  B23Q11/00 ,  B01D45/16 ,  B01D46/00 ,  B01D46/10 ,  B25F5/02

Abstract: A dust collector for an electric power tool includes a main body case, a dust box, a sliding portion, and a dust collecting route. The main body case includes an exhaust port, the main body case being configured to be installed on an electric power tool. The dust box internally includes a filter. The sliding portion is disposed on the main body case. The sliding portion has a front end on which a nozzle with a suction opening is disposed. The sliding portion is slidable in a front-rear direction. The dust collecting route is from the suction opening to the exhaust port passing through the filter. The main body case includes a guiding portion through which the sliding portion passes, and the guiding portion allows the sliding portion to project rearward when the sliding portion slides.