公开(公告)号：US12097604B2

公开(公告)日：2024-09-24

申请号：US17795398

申请日：2021-03-02

Applicant: MAKITA CORPORATION

Inventor： Takeshi Kamiya ,  Koji Takahagi ,  Tomohiko Imae ,  Jun Ueda ,  Yuta Araki ,  Hidenori Nagasaka

IPC: B25F5/00 ,  B25F5/02

CPC classification number: B25F5/026

Abstract: A power tool receives a reaction force with an auxiliary handle attached to the power tool. An auxiliary handle attachable to a power tool includes a first arm, a second arm that fastens, together with the first arm, at least a part of the power tool located between the first arm and the second arm, a handle, a grip sensor that detects the handle being gripped with the first arm and the second arm fastening at least the part of the power tool in between, and a signal output unit that outputs, to the power tool, a grip signal indicating that the handle is gripped based on a detection signal from the grip sensor.

公开(公告)号：US11833644B2

公开(公告)日：2023-12-05

申请号：US16416368

申请日：2019-05-20

Applicant: MAKITA CORPORATION

Inventor： Takeshi Kamiya

IPC: B25B21/02 ,  B23B45/00 ,  B25B19/00 ,  B23B45/02

CPC classification number: B25B21/023 ,  B23B45/008 ,  B25B19/00 ,  B23B45/02

Abstract: An electric vibration driver drill as one example of an electric power tool includes the gear housing, the vibration mechanism and the clutch mechanism each located inside the gear housing, the mode switching ring (vibration switching ring) configured to operate the vibration mechanism and rotatably held to the gear housing, the clutch ring (clutch switching ring) configured to operate the clutch mechanism and rotatably held to the housing, and the respective balls located between the mode switching ring and the clutch ring.

公开(公告)号：US11701767B2

公开(公告)日：2023-07-18

申请号：US17065081

申请日：2020-10-07

Applicant: MAKITA CORPORATION

Inventor： Takeshi Kamiya

IPC: B25F5/00 ,  B25B21/02 ,  B23B45/02

CPC classification number: B25F5/001 ,  B23B45/02 ,  B25B21/026 ,  B25B21/023

Abstract: The drill includes a motor, a spindle rotatable with a rotational force transmitted from the motor, a clutch assembly that disables transmission of the rotational force to the spindle in response to a rotational load on the spindle reaching a release value and including an elastic member that adjusts the release value, and a change ring switchable from a clutch mode in which the clutch assembly is operable to a nonclutch mode in which the clutch assembly is inoperable in response to the change ring operated in a forward rotation direction. In the clutch mode, the elastic member elastically deforms to reduce the release value in response to the change ring operated in the forward rotation direction, and to increase the release value in response to the change ring operated in a backward rotation direction.

公开(公告)号：US11498190B2

公开(公告)日：2022-11-15

申请号：US16728094

申请日：2019-12-27

Applicant: MAKITA CORPORATION

Inventor： Takeshi Kamiya

IPC: B25B21/02 ,  B25D16/00

Abstract: A power tool allows mode switching and clutch operation torque switching using a single ring. An electric vibration driver drill includes an internal gear that meshes with planetary gears, an internal gear lock pin that moves forward relative to the internal gear to lock the internal gear, a first vibration cam fixed to a spindle, a second vibration cam that rubs against the first vibration cam and rotate relative to a gear housing, a vibration switch lever that moves forward relative to the second vibration cam to lock the second vibration cam in a nonrotatable manner, and an annular change ring that switches between forward movement and rearward movement of the internal gear lock pins and switches between forward movement and rearward movement of the vibration switch lever.

公开(公告)号：US12194601B2

公开(公告)日：2025-01-14

申请号：US17988075

申请日：2022-11-16

Applicant: MAKITA CORPORATION

Inventor： Takeshi Kamiya

IPC: B25B21/02

Abstract: To reduce size increase, an impact tool includes a motor, a spindle located frontward from the motor and rotatable by the motor, an inner hammer supported by the spindle, an outer hammer surrounding the inner hammer and rotatable together with the inner hammer, an anvil strikable by the inner hammer in a rotation direction, a hammer case accommodating the inner hammer and the outer hammer, and a bearing held in the hammer case and supporting the outer hammer in a rotatable manner.

公开(公告)号：US12122029B2

公开(公告)日：2024-10-22

申请号：US17695965

申请日：2022-03-16

Applicant: MAKITA CORPORATION

Inventor： Takeshi Kamiya

IPC: B25D16/00 ,  B25B21/02

CPC classification number: B25D16/006 ,  B25B21/023 ,  B25B21/026 ,  B25D16/003 ,  B25D2211/064 ,  B25D2211/067 ,  B25D2216/0023

Abstract: A reducer appropriately selects from three or more variable speeds to match multiple operational modes. An impact driver includes a motor, a reducer that reduces rotation from the motor to select from three or more variable speeds, a plurality of actuators to be actuated by the rotation reduced by the reducer, and a switcher that selects, from the plurality of actuators, a specific actuator to be actuated in a predetermined operational mode. The switcher causes the reducer to cooperate with the selected specific actuator and actuates the reducer at a predetermined variable speed of the three of more variable speeds corresponding to the predetermined operational mode of the selected specific actuator.

公开(公告)号：US11945091B2

公开(公告)日：2024-04-02

申请号：US17694822

申请日：2022-03-15

Applicant: MAKITA CORPORATION

Inventor： Takeshi Kamiya

IPC: B25F5/00 ,  B25B21/02

CPC classification number: B25F5/001 ,  B25B21/02

Abstract: A power tool with a small size in an axial direction includes a reducer allowing smooth and stable switching between variable speeds. The power tool includes a motor, a reducer that reduces rotation from the motor, and an actuator actuated by the rotation reduced by the reducer. The reducer includes a preceding internal gear in a preceding stage, a succeeding internal gear in a succeeding stage, an engagement member radially outward from the internal gears and switchable between a first position to restrict rotation of the preceding internal gear and a second position to restrict rotation of the succeeding internal gear, planetary gears that revolve within the internal gears, carriers supporting the planetary gears, and an operation unit to switch the engagement member selectively to the first position or the second position.

公开(公告)号：US11458610B2

公开(公告)日：2022-10-04

申请号：US16875473

申请日：2020-05-15

Applicant: MAKITA CORPORATION

Inventor： Takeshi Kamiya

IPC: B25F5/00 ,  B25F5/02 ,  B25D16/00 ,  B25B21/02 ,  B25B21/00

Abstract: Rotation of a spindle relative to a first cam is reduced. A power tool includes a spindle to receive a tip tool and rotatable about a rotation axis, and a vibration mechanism that vibrates the spindle in an axial direction. The spindle has an outer surface including, in a cross section orthogonal to the rotation axis, a first portion at a first distance from the rotation axis, and a second portion at a second distance from the rotation axis. The vibration mechanism includes a first cam surrounding the spindle, and a second cam located behind and in contact with the first cam.

公开(公告)号：US11267118B2

公开(公告)日：2022-03-08

申请号：US16416406

申请日：2019-05-20

Applicant: MAKITA CORPORATION

Inventor： Takeshi Kamiya

IPC: B25D16/00

Abstract: An electric power tool includes a motor, a spindle, a first vibration cam, a housing, a second vibration cam, a vibration switching member, and a plurality of biasing members. The spindle is rotatable by the motor. The first vibration cam is fixed to the spindle. The first vibration cam is located inward of the housing. The second vibration cam is located inward of the housing. The second vibration cam is configured to be in friction with the first vibration cam. The vibration switching member switches between a rotatable condition and an unrotatable condition of the second vibration cam with respect to the housing. The plurality of biasing members bias the vibration switching member.

公开(公告)号：US10720863B2

公开(公告)日：2020-07-21

申请号：US16379893

申请日：2019-04-10

Applicant: MAKITA CORPORATION

Inventor： Itsuku Kato ,  Katsuna Hayashi ,  Kouichi Takeda ,  Hidenori Nagasaka ,  Takeshi Kamiya

IPC: H02P6/28 ,  B23B45/02 ,  B23B45/00 ,  B25F5/00

Abstract: An electric power tool may include a three-phase brushless motor configured to drive a tool, a gear reducer provided between the motor and the tool. The gear reducer is configured to selectively change a reduction ratio from the motor to the tool between a first reduction ratio and a second reduction ratio. The electric power tool may further include a motor controller configured to drive the motor with rectangular waves. The motor controller is configured to selectively change a conduction angle of each rectangular wave between at least a first conduction angle and a second conduction angle.