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公开(公告)号：US10751868B2
公开(公告)日：2020-08-25
申请号：US14953180
申请日：2015-11-27
申请人： MAKITA CORPORATION
发明人： Yoshiro Tada , Masanori Furusawa , Kei Watanabe
摘要： It is an object of the invention to provide rational structure for vibration proofing in hammering operation. A driving motor 110 and a striking mechanism 140 are provided in a first body element 101a, and a handle 109 and a battery mounting part 160 are provided in a second body element 101b. The first and second body elements 101a, 101b are moved with respect to each other via a biasing member 181 when vibration is caused by driving of the striking mechanism 140. Further, a first region 100a close to the striking mechanism 140 forms a long-distance moving region 200 in which the first and second body elements 101a, 101b move a longer distance in a longitudinal direction than in the second region 100b less close to the striking mechanism 140.
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公开(公告)号：US10661421B2
公开(公告)日：2020-05-26
申请号：US15069668
申请日：2016-03-14
申请人： Robert Bosch GmbH
发明人： Jens Blum , Heiko Roehm , Tobias Herr
IPC分类号： B25F3/00 , B25D11/00 , B25D17/04 , B25F5/02 , B23B45/00 , B25B21/02 , B25B23/00 , B25D17/08 , B25D11/08 , B25D17/24
摘要： In a tool attachment for a handheld power tool, which includes a tool housing having a fastening interface, having an attachment housing, on which a locking unit, for locking the tool attachment on the fastening interface of the handheld power tool, and a tool receptacle for accommodating an insert tool are situated, a percussion mechanism is situated in the attachment housing, which is configured to apply percussions carried out in the axial direction in relation to the tool receptacle to an insert tool, which is situated in the tool receptacle, during percussion operation of the tool attachment, the tool receptacle being fixed in position in the attachment housing in a non-rotating way at least during percussion operation.
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公开(公告)号：US10590668B2
公开(公告)日：2020-03-17
申请号：US14941550
申请日：2015-11-14
申请人： Richard Tailly
发明人： Richard Tailly
摘要： A powered tile breaker has an adjustable frame and the frame is further comprised of a handlebar member, a foldable shaft, a base member, and wheels. The base member holds a chiseling assembly which comprises a main electric motor located inside a motor casing. The motor powers a chisel member. The chiseling assembly is angularly adjustable by way of an actuator member which consists in a secondary electric motor driving a piston. The piston has one end rotationally connected to the base member, and the actuator member is rotationally connected to a lever member which extends from the chiseling assembly and which connects at a pivot point.
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公开(公告)号：US20200061792A1
公开(公告)日：2020-02-27
申请号：US16668631
申请日：2019-10-30
发明人： Andrew D. Van Hoorn , Kevin R. Gee
IPC分类号： B25D11/06 , B25D17/06 , H02K7/14 , H02P29/00 , B25D11/00 , B25D17/26 , B25D17/24 , B25D17/04 , B25D11/12 , B25F5/02 , B25F5/00
摘要： A percussion tool, for performing a chiseling operation on a workpiece with a chisel, comprises a housing including a front side, and rear side, and opposite lateral sides extending between the front and rear sides, a first handle coupled to a first of the lateral sides of the housing, a second handle coupled to a second of the lateral sides of the housing, the first and second handles oriented coaxially along a handle axis, an electric motor positioned within the housing, a percussion mechanism driven by the motor and including a striker supported for reciprocation relative to the housing along a striker axis, and a light source that produces light to illuminate the workpiece. The chisel is configured to deliver repeated axial impacts to the workpiece in response to receiving repeated axial impacts from the striker.
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公开(公告)号：US10052747B2
公开(公告)日：2018-08-21
申请号：US14425186
申请日：2013-08-30
申请人： MAKITA CORPORATON
发明人： Yonosuke Aoki
CPC分类号： B25D11/005 , B25D11/125 , B25D2211/003 , B25D2250/021 , B25D2250/245 , B25D2250/275
摘要： A hammer tool for hammering on a workpiece by a tool bit moving at least linearly in a longitudinal direction of the tool bit, configured so that a hammering element moves toward the tool bit to hits the tool bit by way of air pressure fluctuation in an air chamber when a driving element is moved from a first position to a second position. In addition, the stroke center position of the reciprocating movement of the driving element moved between the first position and the second position is configured to be changeable.
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公开(公告)号：US10052732B2
公开(公告)日：2018-08-21
申请号：US15546485
申请日：2016-02-15
申请人： NSK LTD.
发明人： Hidekazu Suzuki , Atsushi Ishikawa
CPC分类号： B23Q11/12 , B23Q1/70 , B23Q5/10 , B23Q11/127 , B23Q2220/006
摘要： A cooling gas is fed from an ejection nozzle into the interior of a through-hole which is formed in a radially central portion of a main spindle, and which penetrates through said main spindle in an axial direction. The cooling gas passes through radial venting holes provided in a plurality of locations, in the circumferential direction, in an axially intermediate portion of the main spindle, is fed into axial venting holes provided in a plurality of locations, in the circumferential direction, extending from one axial-direction end of the main spindle to an intermediate portion thereof, is caused to flow through the axial venting holes, and is discharged from discharge holes.
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公开(公告)号：US09969073B2
公开(公告)日：2018-05-15
申请号：US14443038
申请日：2013-11-12
CPC分类号： B25D17/06 , B25D11/005 , B25D2217/0019 , B25D2217/0023 , B25D2250/131 , B25D2250/191 , B25D2250/245
摘要： A hand-held power tool is disclosed. The tool has a tool receptacle for holding a chiseling tool. A pneumatic percussion mechanism of the hand-held power tool includes a striker, an exciter and a guide tube. The striker is designed to apply impacts in the impact direction to the tool. The exciter is motor-driven. The striker is coupled by an air spring to the reciprocating movement of the exciter. The striker abutting the guide tube is guided along a working axis. During a movement between an impact position and the exciter, the striker is guided with a constant guide length on the guide tube and if the impact position is exceeded in the impact direction, the guide length is reduced. The hand-held power tool is equipped with an inclined guide, which inclines the striker relative to the working axis when the impact position is exceeded.
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公开(公告)号：US09969071B2
公开(公告)日：2018-05-15
申请号：US14403258
申请日：2013-04-24
申请人： Robert Bosch GmbH
发明人： Rainer Nitsche , Matthias Tauber , Gerd Schlesak , Antoine Vandamme , Thomas Winkler , Christian Bertsch , Achim Duesselberg , Ulli Hoffmann , Thilo Henke , Juergen Lennartz , Helge Sprenger
CPC分类号： B25D16/006 , B25D11/00 , B25D11/005 , B25D2211/003 , B25D2211/068 , B25D2250/035 , B25D2250/131 , B25D2250/145 , B25D2250/201 , B25D2250/221
摘要： Percussion unit, especially for a rotary hammer and/or percussion hammer, comprising a control unit which is designed for open-loop and/or closed loop control of a pneumatic percussion mechanism, and at least one operating condition sensor unit. According to the disclosure, the control unit is designed to detect at least one percussion mechanism parameter depending on measurement values of the operating condition sensor unit.
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公开(公告)号：US20170246734A1
公开(公告)日：2017-08-31
申请号：US15593434
申请日：2017-05-12
申请人： Black & Decker Inc.
发明人： Stefan D. Gensmann
CPC分类号： B25D9/26 , B25D9/16 , B25D11/005 , B25D11/125 , B25D2250/021 , B25D2250/035 , B25D2250/195 , B25D2250/221 , B25D2250/231
摘要： A hammer drill having a motor mounted within a body and an output spindle; a tool holder mounted on the body capable of holding a cutting tool; a hammer mechanism having a piston; a reciprocating drive for converting rotary movement of the motor into reciprocating movement of the piston; a ram reciprocatingly driven by the piston via an air spring to strike a cutting tool held in the tool holder, the hammer mechanism performing one hammer cycle each time the ram strikes a cutting tool during normal use; an air replenishment mechanism capable of refreshing the air spring during certain time periods during normal use; the air replenishment mechanism capable of being adjusted to refresh the air spring during time periods within the hammer cycle and/or the system allows different volumes of air into or out of the air spring during the refreshment time periods.
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公开(公告)号：US09724814B2
公开(公告)日：2017-08-08
申请号：US14374508
申请日：2012-12-07
申请人： MAKITA CORPORATION
CPC分类号： B25D11/06 , B25D11/00 , B25D11/062 , B25D16/00 , B25D17/24 , B25D2211/003 , B25D2211/006 , B25D2217/0092 , B25D2250/095
摘要： An impact tool performs a processing operation on a workpiece by carrying out an impact operation on a tool bit in a longitudinal axis direction. The impact tool includes a motor having a rotor and a stator, a tool main body housing the motor, a drive shaft parallel to a longitudinal axis of the tool bit and rotatably driven by the motor, and an oscillating member that is supported by the drive shaft and that carries out an oscillating movement in the axial direction of the drive shaft based on the rotational motion of the drive shaft. A tool drive mechanism is coupled to the oscillating member so that the oscillating movement of the oscillating member linearly moves the tool bit in the longitudinal axis direction. The motor is an outer rotor motor in which the rotor is disposed on an radially outer side of the stator.
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