公开(公告)号：US11052524B2

公开(公告)日：2021-07-06

申请号：US15742832

申请日：2016-07-07

申请人： Furukawa Rock Drill Co., Ltd.

发明人： Masahiro Koizumi

IPC分类号： B25D9/26 ,  B25D9/14 ,  B25D9/16

摘要： Hammering power of a hydraulic hammering device is improved by shortening a piston stroke, while keeping hammering energy. The device includes a cylinder, a piston slidingly fitted in the cylinder, and a piston front chamber and a piston rear chamber defined between an outer circumferential surface of the piston and an inner circumferential surface of the cylinder and disposed separately from each other at front and rear, respectively, in an axial direction. The device also includes a switching-valve mechanism driving the piston by switching at least one of the piston front or rear chamber into communication with at least one of a high pressure circuit or a low pressure circuit, and an acceleration piston disposed behind the piston and coming in contact with the piston during a retreat stroke of the piston to urge the piston forward in cooperation with braking force by pressurized oil acting on the piston.

公开(公告)号：US10603775B2

公开(公告)日：2020-03-31

申请号：US15593434

申请日：2017-05-12

申请人： Black & Decker Inc.

发明人： Stefan D. Gensmann

IPC分类号： B25D9/26 ,  B25D9/16 ,  B25D11/12 ,  B25D11/00

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.

公开(公告)号：US20190291254A1

公开(公告)日：2019-09-26

申请号：US16291478

申请日：2019-03-04

申请人： James Kevin Panks

发明人： James Kevin Panks

IPC分类号： B25D17/00 ,  B25D9/16

摘要： The present disclosure generally relates to quick change attachments for a pneumatic percussive tool. The attachments convert a pneumatic percussive tool, such as an air impact tool with proximal attachment means, which has a “pushing” force, into a pneumatic percussive tool having a “pulling” force. Once attached to the pneumatic percussive tool, the attachments also provide a quick change feature for allowing “pulling” tools to be simply and easily removed and replaced.

公开(公告)号：US09701003B2

公开(公告)日：2017-07-11

申请号：US14285780

申请日：2014-05-23

申请人： Caterpillar Inc.

发明人： Cody Moore

IPC分类号： B25D9/12 ,  B25D9/26 ,  B25D9/14 ,  E02F3/96 ,  B25D9/18 ,  E02F9/22 ,  B25D9/16 ,  F15B13/02 ,  F15B11/042

CPC分类号： B25D9/265 ,  B25D9/12 ,  B25D9/145 ,  B25D9/16 ,  B25D9/18 ,  E02F3/966 ,  E02F9/2267 ,  F15B11/042 ,  F15B13/024

摘要： An automatic shutoff system for a hydraulic hammer is disclosed. The automatic shutoff system may include an inlet groove formed around a piston associated with the hydraulic hammer and configured to receive pressurized fluid, and an outlet groove formed around a piston associated with the hydraulic hammer and configured to discharge the pressurized fluid. The automatic shutoff system may also include an annular passage configured to allow the pressurized fluid to flow between the inlet and outlet grooves. The automatic shutoff system may further include a valve disposed upstream of the inlet groove and configured to selectively block the pressurized fluid from flowing into the inlet groove based on an operational state of the hydraulic hammer.

公开(公告)号：US20170156973A1

公开(公告)日：2017-06-08

申请号：US15262342

申请日：2016-09-12

申请人： EMPI, Inc.

发明人： Lotta Hart

IPC分类号： A61H23/00 ,  G10K15/04 ,  B25D9/16 ,  B25D9/26 ,  A61H23/04 ,  B25D9/08

CPC分类号： A61H23/008 ,  A61H1/008 ,  A61H23/04 ,  A61H2023/002 ,  A61N7/00 ,  A61N2007/0004 ,  B25D9/08 ,  B25D9/16 ,  B25D9/26 ,  G06F19/3481 ,  G10K15/043

摘要： A processor-controlled, energy-based therapy apparatus includes a device configured to provide therapeutic energy to a patient and a processor that controls the output of the device. The output of the device is based on output profiles programmed into the processor. The output profiles include a therapeutic energy output profile and a ramp-up energy profile. The therapeutic energy output profile includes a desired target energy level and a therapeutic duration for controlling the output of the device during a therapeutic period. The ramp-up energy output profile includes an initial treatment energy level and a ramp-up duration for controlling the output of the device during a ramp-up period. The energy output specified by the ramp-up energy output profile incrementally increases over the ramp-up duration as a function of the desired target energy level and the ramp-up duration.

公开(公告)号：US20160297058A1

公开(公告)日：2016-10-13

申请号：US15033786

申请日：2014-10-24

申请人： CONSTRUCTION TOOLS PC AB

发明人： Thomas LILJA ,  Olof ÖSTENSSON

IPC分类号： B25D9/16 ,  B25D16/00

CPC分类号： B25D9/16 ,  B25D9/14 ,  B25D16/00 ,  B25D2250/181 ,  B25D2250/245

摘要： A pneumatic hammer including a connector for connection to an external compressed air source and a striking mechanism. The striking mechanism includes a housing and a piston arranged for reciprocating motion in the housing. The striking piston has front and rear piston portions. The piston and the housing form front and rear spaces. A compressed air conduit is arranged in airflow communication with the front space via a second passage in the housing, at which second passage a first valve is arranged. There is an intermediate space between the front and rear piston portions and the housing. The control unit is alternately subjected to air pressure of the rear space with respect to the intermediate space during reciprocating motion of the piston. The control unit controls the first valve based on air pressure to alternately supply compressed air to the front space and achieving a return movement of the piston.

摘要翻译： 一种气动锤，包括用于连接到外部压缩空气源的连接器和打击机构。 撞击机构包括壳体和设置成在壳体中往复运动的活塞。 打击活塞具有前活塞部分和后活塞部分。 活塞和外壳形成前后空间。 压缩空气管道经由壳体中的第二通道与前部空间气流连通地布置，第二通道设置有第一阀门。 前活塞部分和后活塞部分之间存在中间空间。 控制单元在活塞的往复运动期间相对于中间空间交替地受到后部空间的空气压力。 控制单元基于空气压力控制第一阀，以交替地向前部空间供应压缩空气并实现活塞的返回运动。

公开(公告)号：US20150158165A1

公开(公告)日：2015-06-11

申请号：US14099226

申请日：2013-12-06

申请人： Ingersoll-Rand Company

发明人： Mark T. McClung

IPC分类号： B25D9/16 ,  B25B19/00

CPC分类号： B25B19/00 ,  B25B21/02 ,  B25B23/1453

摘要： Illustrative embodiments of impact tools with speed controllers and methods of controlling such impact tools are disclosed. In at least one illustrative embodiment, an impact tool may comprise a ball-and-cam impact mechanism including a hammer and an anvil. The hammer may be configured to rotate about a first axis and to translate along the first axis to impact the anvil to cause rotation of the anvil about the first axis. The impact tool may further comprise a motor and a speed controller. The motor may include a rotor configured to rotate when a flow of compressed fluid is supplied to the rotor to drive rotation of the hammer of the ball-and-cam impact mechanism. The speed controller may be coupled to the rotor and may be configured to throttle the flow of compressed fluid supplied to the rotor based on a rotational speed of the rotor.

摘要翻译： 公开了具有速度控制器的冲击工具和控制这种冲击工具的方法的说明性实施例。 在至少一个说明性实施例中，冲击工具可以包括包括锤和砧座的球 - 凸轮冲击机构。 锤可以构造成围绕第一轴线旋转并且沿着第一轴线平移以冲击砧座以使砧座围绕第一轴线旋转。 冲击工具还可以包括马达和速度控制器。 电动机可以包括转子，其构造成当压缩流体流被供应到转子以驱动球 - 凸轮冲击机构的锤的旋转时旋转。 速度控制器可以耦合到转子，并且可以被配置为基于转子的转速来节流供应到转子的压缩流体的流动。

公开(公告)号：US20120160528A1

公开(公告)日：2012-06-28

申请号：US13298717

申请日：2011-11-17

申请人： Francis Theobalds

发明人： Francis Theobalds

IPC分类号： B25D9/16 ,  F16K31/12 ,  B25D9/14

CPC分类号： E02F3/966 ,  B25D9/12 ,  B25D9/16 ,  B25D9/265 ,  E02F9/2267 ,  F15B13/024

摘要： A pressure protection valve is provided which provides a fluid short circuit between a fluid pressure inlet of a hydraulic tool such as a hydraulic hammer and a low pressure region when the pressure at the fluid pressure inlet exceeds a first trigger pressure equal to a predetermined permissible pressure. This prevents damage to the hydraulic tool which can arise through operation at excessive fluid flow or pressure from hydraulic fluid supplied by a carrier vehicle. The pressure protection valve may maintain fluid communication between the fluid pressure inlet and the low pressure region until the pressure at the fluid pressure inlet reduces to a pressure below a predetermined second trigger pressure which is less than the first trigger pressure, to prevent further operation of the tool until the flow of fluid to the fluid pressure inlet has been stopped by an operator.

摘要翻译： 提供一种压力保护阀，当压力入口处的压力超过等于预定允许压力的第一触发压力时，提供在诸如液压锤的液压工具的流体压力入口与低压区域之间的流体短路 。 这防止了液压工具的损坏，该液压工具可以通过在由载体车辆供应的液压流体的过度流体流动或压力下操作而产生。 压力保护阀可以保持流体压力入口和低压区域之间的流体连通，直到流体压力入口处的压力降低到小于第一触发压力的预定的第二触发器压力的压力，以防止进一步的操作 直到流体流入流体压力入口的流动已经被操作者停止。

公开(公告)号：US08181714B2

公开(公告)日：2012-05-22

申请号：US12383471

申请日：2009-03-24

申请人： Mark D. Randa

发明人： Mark D. Randa

IPC分类号： B25D9/16 ,  B23B45/04

CPC分类号： B25D9/04 ,  B25D17/20 ,  E21B4/145

摘要： A reversible, pneumatic ground piercing tool has a tail assembly with exhaust passages therethrough. At least a portion of each exhaust passage angles radially inwardly and ends in discharge ports that communicate with a central hole at the rear end of the tail assembly, whereby exhaust escapes through the central hole. A tail cone has a radially inwardly extending flange on the inner periphery of the central hole, which flange is rearwardly spaced from and covers the discharge ports.

摘要翻译： 可逆的气动地面穿孔工具具有尾部组件，排气通道穿过其中。 每个排气通道的至少一部分径向向内并且在排放口端部终止，该排出口与尾部组件的后端处的中心孔连通，由此排气通过中心孔排出。 尾锥在中心孔的内周上具有径向向内延伸的凸缘，该凸缘与排出口向后隔开并覆盖排出口。

公开(公告)号：US20110315415A1

公开(公告)日：2011-12-29

申请号：US13255656

申请日：2010-02-02

申请人： Hiroyasu Nishikawa ,  Sei Shimahara ,  Manabu Nakanishi ,  Masashi Shibata

发明人： Hiroyasu Nishikawa ,  Sei Shimahara ,  Manabu Nakanishi ,  Masashi Shibata

IPC分类号： B25D9/16

CPC分类号： E02F9/2296 ,  E02F3/966 ,  E02F9/2228 ,  E02F9/2285 ,  E02F9/2292

摘要： A work machine equipped with an automatic hammering function is capable of preventing breakage of the hammer caused by blank firing. Hydraulic oil fed to a hydraulic breaker at the distal end of a work machine is controlled by first and second spools. Operating an operation lever so as to contract single rod type boom cylinders to press the hydraulic breaker against an object to be crushed. Head-side pressure and rod-side pressure of the boom cylinders are respectively detected by pressure sensors. Any one of switches is used to switch the mode of automatic hammering operation between an automatic hammering inhibiting mode and an automatic hammering authorizing mode. In the automatic hammering authorizing mode, a controller controls the first and second spools of the hydraulic breaker so as to open them only when head-side pressure and rod-side pressure of the boom cylinders are in a given range of pressing force.

摘要翻译： 配备有自动锤击功能的作业机器能够防止由于坯料烧制造成的锤子破损。 通过第一和第二卷轴控制供给到作业机械末端的液压破碎器的液压油。 操作操作杆，以收缩单杆式动臂缸，将液压破碎机压靠待压碎的物体。 动臂缸的头侧压力和杆侧压力分别由压力传感器检测。 任何一个开关用于在自动打击抑制模式和自动锤击授权模式之间切换自动锤击操作模式。 在自动锤击授权模式中，控制器控制液压破碎器的第一和第二线轴，以便仅当起重臂液压缸的侧面压力和杆侧压力处于给定的按压力范围时才能打开。