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公开(公告)号：US20190084107A1
公开(公告)日：2019-03-21
申请号：US16131525
申请日：2018-09-14
申请人： MAKITA CORPORATION
发明人： Michisada YABUGUCHI
摘要： A rotary tool or machine includes: an output shaft; a motor that rotates the output shaft; an operation part for commanding driving/stopping of the motor; and a control unit that controls the driving/stopping of the motor in accordance with commands from the operation part. The control unit is configured to generate a braking force in the motor or on the output shaft when the motor is to be stopped in proportion to a tightening force (torque) applied to the tool accessory when the motor is started up, such that the greater the tightening force (torque), the greater the braking force.
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公开(公告)号：US20040017119A1
公开(公告)日：2004-01-29
申请号：US10449331
申请日：2003-05-29
发明人： Hirokatsu Yamamoto , Simoru Otogao
IPC分类号： H02K011/00 , H02K009/00
摘要： It is an object of the present teachings to provide a technique that rationalizes the structure of the brushless motor so as to save space in the power tool. According to the present teachings, a representative brushless motor utilized in a power tool may comprise a stator, a rotor and a cooling fan. The brushless motor is disposed within the power tool. The brushless motor is adapted to supply driving current to the stator to drive a tool bit of the power tool by rotating the rotor. The cooling fan is molded of a magnetic or conductive material so that the cooling fan also serves as a rotating position detector that detects the rotating position of the rotor with respect to the stator. Because the cooling fan may also have a function of rotating position detector of the rotor, the inner space of the power tool can be rationalized.
摘要翻译： 本发明的目的是提供一种使无刷电动机的结构合理化以便节省电动工具空间的技术。 根据本教导，在动力工具中使用的代表性的无刷电动机可以包括定子，转子和冷却风扇。 无刷电动机设置在动力工具内。 无刷电动机适于通过旋转转子向定子提供驱动电流以驱动电动工具的工具头。 冷却风扇由磁性或导电材料模制而成，使得冷却风扇也用作检测转子相对于定子的旋转位置的旋转位置检测器。 因为冷却风扇也可以具有旋转位置检测器的功能，因此可以使电动工具的内部空间合理化。
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公开(公告)号：US20240359298A1
公开(公告)日：2024-10-31
申请号：US18765769
申请日：2024-07-08
申请人： MAKITA CORPORATION
摘要： A power tool includes an anvil (14) operably driven by a motor (10); an insertion hole (91) defined the anvil, into which a bit is insertable; a through hole (92) extending radially from the insertion hole; a ball (93) disposed in the through hole; and a manually-movable sleeve (99) mounted around on the anvil and being axially slidable relative to the anvil. At a retracted position, the manually-movable sleeve presses the ball radially inwardly. At an advanced position, the manually-movable sleeve releases the pressing of the ball. A flat spring (97) is configured to bias the ball radially inwardly. The manually-movable sleeve has a length such that the flat spring is exposed at the advanced position.
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公开(公告)号：US20240351181A1
公开(公告)日：2024-10-24
申请号：US18632492
申请日：2024-04-11
申请人： MAKITA CORPORATION
发明人： Hidenori NAGASAKA , Yuta ARAKI , Ryoichi ISHIKAWA , Tomohiko IMAE
CPC分类号： B25F5/02 , B25F5/001 , E21B11/005
摘要： A rechargeable angle drill includes: a motor, which includes a rotor configured to rotate about a motor rotation axis, the motor rotation axis extending in an up-down direction; a motor housing part, which houses the motor; a trigger lever, which is operated to start the motor; a handle housing part, which is disposed upward of the motor housing part and in which the trigger lever is provided; a speed reduction mechanism; a gear housing part, which is disposed downward of the motor housing part and houses the speed reduction mechanism; and a rotation output part, which protrudes forward from the gear housing part and rotates about an output rotation axis orthogonal to the motor rotation axis based on a rotational force transmitted from the motor via the speed reduction mechanism. The trigger lever is disposed upward of a center of the handle housing part in the up-down direction.
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公开(公告)号：US12122032B2
公开(公告)日：2024-10-22
申请号：US18073107
申请日：2022-12-01
申请人： MAKITA CORPORATION
发明人： Yukiko Eba , Takao Kuroyanagi
CPC分类号： B25F5/001 , B25B21/008 , F16H3/666
摘要： An electric work machine includes: a motor; a first planetary gear mechanism; a second planetary gear mechanism; a spindle; a first speed switch mechanism including a first internal gear of a first stage unit and a second internal gear of a second stage unit; and a second speed switch mechanism. The first speed switch mechanism performs switching between a first speed reducing mode in which rotation of the second internal gear is prevented and rotation of the first internal gear is allowed and a second speed reducing mode in which rotation of the first internal gear is prevented and rotation of the second internal gear is allowed. The second speed switch mechanism performs switching between an enabled mode in which rotation of an internal gear of the second planetary gear mechanism is prevented and a disabled mode in which the rotation of the internal gear is allowed.
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公开(公告)号：US12122031B2
公开(公告)日：2024-10-22
申请号：US17952510
申请日：2022-09-26
申请人： MAKITA CORPORATION
发明人： Yukiko Eba , Yuta Araki
摘要： An electric work machine reduces damage to its components under a greater load on a spindle. An electric work machine includes a motor, a planetary gear assembly rotatable with a rotational force from the motor and including a carrier having a hole having an inner surface including two carrier flat surfaces, a spindle including a rear portion received in the hole and having an outer surface including two spindle flat surfaces, and a spindle locking assembly that transmits a rotational force in one direction from the carrier to the spindle and including a lock cam surrounding the spindle frontward from a front surface of the carrier and rotatable together with the spindle, a lock ring surrounding the lock cam, and a plurality of cylindrical members between the lock cam and the lock ring.
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公开(公告)号：US12122016B2
公开(公告)日：2024-10-22
申请号：US17666773
申请日：2022-02-08
申请人： MAKITA CORPORATION
发明人： Fumihide Sugita
CPC分类号： B24B55/102 , B24B23/02
摘要： A long rod grinding machine reduces the likelihood of dust escaping and falling. The long rod grinding machine includes a head and a rod having an end connected to the head and extending in a front-rear direction. The head includes an electric motor, a pad movable with a driving force from the electric motor, a vertical wall surrounding a radially outer edge of the pad, and a contact member located between the vertical wall and the pad and surrounding the radially outer edge of the pad. The contact member includes a brush holder having one or more through-holes extending in a radial direction of the pad, and a brush located below the brush holder and having a lower end located downward from a lower end of the vertical wall.
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公开(公告)号：US12121134B2
公开(公告)日：2024-10-22
申请号：US17954538
申请日：2022-09-28
申请人： MAKITA CORPORATION
发明人： Yoichiro Koike
CPC分类号： A45F3/04 , A45F3/12 , A45F2003/045 , A45F2003/125
摘要： A backpack-type assembly may include: a body; and a base member. The body may include a cooling fan. The base member may include: a back plate attached to the body; and a harness attached to the back plate and configured to be worn on a user. The harness may include: a cooling port; and at least one shoulder belt configured to be worn on a shoulder of the user. The cooling fan may be configured to circulate cooling air into or out of the base member through the cooling port of the harness.
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公开(公告)号：US20240337271A1
公开(公告)日：2024-10-10
申请号：US18749034
申请日：2024-06-20
申请人： MAKITA CORPORATION
发明人： Fumitoshi NUMATA
CPC分类号： F04D29/4253 , F04D17/165 , F04D25/086
摘要： A blower includes a body, a motor, and a single fan configured to rotate in response to rotation of a motor shaft to discharge air through a discharge opening. The maximum rotational speed of the motor shaft is within a range of 50,000 rpm to 120,000 rpm. An area of the discharge opening is changeable by a user. The blower is configured to selectively operate in a first mode or in a second mode according to the area of the discharge opening. In the first mode, the maximum blowing force of the air discharged through the opening is within a range of 2.5 N to 5.0 N when the motor is driven at the maximum rotational speed. In the second mode, the maximum dynamic pressure of the air discharged is within a range of 30 kPa to 65 kPa when the motor is driven at the maximum rotational speed.
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公开(公告)号：US20240326216A1
公开(公告)日：2024-10-03
申请号：US18422193
申请日：2024-01-25
申请人： MAKITA CORPORATION
发明人： Yoshitaka MACHIDA , Taro Hisano
CPC分类号： B25D17/043 , B25D16/00
摘要： An auxiliary handle for a work tool reduces vibrations transmitted to a grip. An auxiliary handle for a work tool is an auxiliary handle detachably attachable to the work tool. The auxiliary handle includes an attachment being elongated, elastically deformable, and windable around an outer circumference of the work tool, a threaded shaft including a basal portion connected to two ends of the attachment, a base being cylindrical and receiving the threaded shaft, a distal member being adjacent to a distal end of the base and receiving a distal end of the threaded shaft screwed into the distal member, and a grip being cylindrical and covering the base.
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