117results about "Portable percussive tools" patented technology

The present invention relates to a butt with recoil absorption for firearm or tool which improves recoil absorption when firing said firearm or using said tool as it features an additional buffering system to support that which is performed by the braking spring.

The utility model discloses a kind of electric grab convenient for motor disassembly and assembly.The utility model includes: shell, the bottom of the shell is provided with motor compartment, the bottom end inside the motor compartment is provided with fixed frame and motor, the bottom of the motor compartment is provided with base;Base, the middle position of the top of the both sides of base is rotatably provided with knob, the middle position of the top of one side inside the base is provided with locking structure.The utility model is provided with locking structure, by locking structure and abutment cooperation, the disassembly and assembly between base and motor compartment are facilitated, then by clamping block and fixed frame cooperation, the disassembly and assembly between motor and motor compartment are facilitated, motor disassembly and assembly procedure are simplified, unnecessary component disassembly and assembly procedure is reduced, disassembly and assembly work hour is reduced, and work efficiency is improved.

An anvil configured to be impacted by a hammer in an impact wrench. The anvil defines a rotational axis. The anvil includes an anvil lug having a driven surface engageable with the hammer. The driven surface includes an involute profile. The involute profile is formed by a base cylinder defining a central axis. The central axis is offset from the rotational axis of the anvil.

An interface system for enabling mating and operation between a set of cordless power tools and a battery pack comprises a housing. The housing includes an interface for mating with the battery pack. The interface may include a set of rails, a set of grooves, a terminal block including a set of terminals, and a catch. The housing includes a first attachment feature configured to attach the housing to a first cordless power tool of the set of cordless power tools in a first orientation and a second attachment feature configured to attach the housing to a second cordless power tool of the set of cordless power tools in a second orientation.

Rock drilling machine (10) comprising a hydraulic percussion unit (11) including a percussion piston (12) for providing percussive impulses to a shank adapter (13) of the rock drilling machine (10) in a forward direction (Dfwd), the shank adapter (13) being configured to be connected to a drill string (6) during operation. A hydraulic damper unit (14) is arranged for damping the recoil movement of the shank adapter (13) in the backward direction (Drev), and a hydraulic extractor unit (16) is arranged for actuating the shank adapter (13) in the backward direction (Drev). The rock drilling machine comprises an inlet coupling (Cp) for connection to a pressure source (P) of pressurised hydraulic fluid and an outlet coupling (CT) for connection to a tank (T) for non-pressurised hydraulic fluid. Further, the inlet coupling (Cr) is connectable to both the hydraulic damper unit (14) and the hydraulic extractor unit (16). The disclosure also relates to a drill rig comprising such a rock drilling machine. (FIG. 4)

Power tool with a pneumatic impact mechanism (3) for alternately striking a tool, comprising an exciter piston (8) driven by an electric motor via an eccentric drive (2), which interacts with an opposing impact piston (9), wherein the exciter and impact pistons (8, 9) are dynamically sealed in a guide tube (10), which is received at a drive-side tube end (11) by a gearbox housing part (12), and which is received at a tool-side tube end (13) by a guide housing part (14), which is detachably attached to the gearbox housing part (12), wherein an annular first bearing device (15a) acting elastically in the radial and axial direction is arranged between the tool-side tube end (13) of the guide tube (10) and the guide housing part (14) surrounding it.and / or that an annular second bearing arrangement (15b) acting elastically in the radial and axial direction is arranged between the drive-side tube end (11) of the guide tube (10) and the surrounding gearbox housing part (12).

An impactor 10, which is electrically powered and suitable for use in surgery, includes: a housing; a brushless DC motor including a stator having multiple coils and a rotor having multiple magnets; a motor controller including a motor driver that supplies current to the coils of the stator to cause the rotor to rotate about the stator; a planetary gear train including an input section, a sun gear, planetary gears, a ring gear, and an output section; a shaft including a shaft section having a non-circular cross-sectional shape; and an impact assembly 15 including a drive component and a driven component.

The invention relates to an electric power tool comprising a pneumatic percussion mechanism (3) for alternately applying impacts to a tool (6) clamped in a tool holder (5), wherein the tool holder (5) is mounted on a guide housing part (8) of the machine housing (7) associated with the pneumatic percussion mechanism (3) by inserting a rear-side connection sleeve (9) of the tool holder (5) into the distal end region of the guide housing part (8), wherein an elastomer sleeve (10) for damping vibrations introduced into the machine housing (7) from the tool side is arranged in a radial gap (11) between the connection sleeve (9) and the guide housing part (8).

The utility model relates to a electric grab with buffer function, characteristics include electric grab, mounting panel and hold subassembly etc., electric grab top is connected with double -deck square mounting panel, each square mounting panel upper portion all slidingly connected with guide rod, and the top guide rod sleeve sets up the spring, and the upper layer guide rod top jointly connects with first hold frame, and the power cord end is connected with first hold frame, and the electric grab middle part is provided with double -deck circular mounting panel and guide rod also, and the middle part guide rod all sleeve sets up the spring, and the electric grab middle part is provided with second hold frame, and the second hold frame ground is connected with a plurality of guide rods, and the first hold frame and second hold frame all are provided with the handle, and the handle is provided with the hold subassembly for buffering the vibration, the advantage is through double -deck guide rod and spring group, forms the phased buffer mechanism, effectively decomposes the impact energy, avoids the vibration concentrated transmission to the operator hand, significantly relieves the vibration fatigue, prolongs the continuous operation time.

An air blade with an improved structure, comprising an outer housing (1) and an inner housing (2), characterized in that the outer housing (1) is made of plastic, wherein the outer housing (1) comprises a handheld section (11) and a mounting section (12), wherein an air supply channel (14) is arranged within the handheld section (11), wherein the inner housing (2) is made of metal material, wherein the inner housing (2) is embedded in the mounting section (12) and injection-molded with the outer housing (1) to form an integrated structure, wherein a mounting cavity (25) is arranged within the inner housing (2), wherein a vent hole (15) is arranged obliquely rearward and upward at the upper end of the air supply channel (14), wherein the vent hole (15) is connected to the air supply channel (14) and the mounting cavity (25).wherein an associated deflection notch (26) is arranged obliquely over the passage of the vent hole (15) at the rear end section of the inner housing (2), wherein an air passage hole (27) communicating with the mounting cavity (25) is arranged at the rear end of the deflection notch (26), wherein the vent hole (15) extends through the deflection notch (26) and communicates with the mounting cavity (25) via an air passage hole (27), wherein the vent hole (15) extends through the rear end of the mounting section (12) to form an opening (151), wherein a locking element (152) is arranged at the opening (151), wherein the vent hole (15) is injection molded together with the outer housing (1) by means of a core pin during injection molding or is formed by drilling the outer housing (1) with a drill.

A rotary power tool assembly including a hammercase an axis extending between a forward end and a rearward end, a drive mechanism housed within the hammercase, and a hammer driven by the drive mechanism to apply a rotational impact force on an anvil. The anvil includes an output shaft rotatable about the axis, a plurality of anvil jaws extending from the axis, and a flange fixedly connected to an end of the output shaft and extending radially from the axis, wherein the flange supports the plurality of anvil jaws, the flange extending over the plurality of anvil jaws. The anvil includes a magnet attached to the flange opposite to the plurality of anvil jaws. An anvil angle sensor is configured to read and interpret magnetic flux changes of the magnet and determine the position of the anvil rotating about the axis.

A hand-held power tool (100) with a mechanical rotary impact mechanism (122) for the impact drive of a tool (140), wherein the rotary impact mechanism (122) has a spring-loaded impact body (225) which is coupled to the rotary drive with an associated drive shaft (120) and is axially displaceable on the drive shaft (120), characterized in that the impact body (225) is spring-loaded by at least one spring element (228; 510) which has at least two different spring constants (Fc1, Fc2), wherein the at least one spring element (228) is designed in the manner of a spring system (605; 705) with at least two individual spring elements (610, 620; 720, 730), wherein the individual spring elements (610, 620) have different spring constants (Fc1, Fc2), characterized in that the at least two individual spring elements (610, 620;720, 730) are arranged in parallel to each other, wherein, in a starting position of the striking body (225), when the at least two individual spring elements (610, 620) are arranged in parallel, a first individual spring element (610) rests against the striking body (225) and a second individual spring element (620) is arranged spaced apart from the striking body (225) by a predetermined distance (630).

To prevent a hammer from being tilted to a spindle.SOLUTION: An impact tool includes a motor, a spindle having at least a part arranged in front of the motor and rotated by the motor, a hammer arranged around the spindle, an anvil having at least a part arranged in front of the spindle and hit by the hammer in the rotation direction, and at least three balls arranged between the spindle and the hammer.SELECTED DRAWING: Figure 5

A power-driven impact tool is provided. The impact tool includes a motor, a transmission, and a rotary impact mechanism received in a housing. The transmission may be a planetary transmission that reduces a speed of a rotary force output by the motor. The impact tool may be a cordless impact tool, receiving power from a battery back that is removably coupled in a battery receptacle of the housing. First and second handles on the housing may provide for user stability and control during operation of the impact tool. A plurality of user selection devices, including a trigger, a forward / reverse switch, and a mode selector, may be provided on one of the handles for user control of the impact tool.

This invention provides a handheld machine tool with enhanced robustness in the tool holder. [Solution] A handheld machine tool (100) is disclosed, comprising a housing (110), a drive unit (111), a striking mechanism (122) drivable by the drive unit (111), and a tool holder (150) for holding a mounted tool, wherein the tool holder (150) is at least partially drivable by the striking mechanism (122). It is proposed that the handheld machine tool (100) has a spacer element formed to separate the mounted tool from the housing (110).

A shield subassembly for fastener driving tools is provided that is operable to prevent an interference condition. The shield subassembly includes a rotary-to-linear lifter with lifter pins and a driver with protrusions, and the lifter pins are individually biased so as to be individually retractable and extendable. The lifter is operable to perform a lift stroke in order to raise the driver to a ready position, and then begin a drive stroke to force a fastener into a substrate. The shield subassembly includes a ramp that forces each lifter pin to partially retract so as not cause an interference condition upon contact with a driver protrusion. Once the lifter pin is rotated past the shield and contact ceases, that lifter pin extends and can then slide under a misaligned driver protrusion, or make contact and begin the lift stroke.

A drive cylinder unit for a power tool having a striking mechanism, in particular a pneumatic striking mechanism, having a drive cylinder that is accommodated in a guide tube so as to be axially movable between a front and a rear end position, which drive cylinder is designed to be fork-shaped at one end and forms two arms, in each case having a mounting bore in which a mounting bolt is rotatably mounted, wherein the mounting bolt is penetrated perpendicular to its longitudinal axis by a bore for accommodating a pin of a swash plate bearing. The drive cylinder is axially preloaded in the direction of the rear end position via a spring element. A power tool having a striking mechanism, in particular a pneumatic striking mechanism, having a drive cylinder unit is also provided.

An actuator for actuating a switch of a powered device having a plurality of positions in which the actuator is magnetically held in position. The actuator includes a first actuator portion including a magnet and a first magnetic element having a first plurality of limbs, whereby magnetic flux of the magnet is directed through the first plurality of limbs; and a second actuator portion including a second magnetic element having a second plurality of limbs for receiving the magnetic flux from the first plurality of limbs. The actuator has a plurality of positions in which limbs of the first plurality of limbs align with limbs of the second plurality of limbs thereby to couple the magnetic flux in a flux loop through two limbs of the first plurality of limbs of the first magnetic element and two limbs of the second plurality of limbs of the second magnetic element.

An impact tool includes: a motor; a motor housing portion that houses the motor; a grip portion extending downward from the motor housing portion; a hammer rotated by the motor; an anvil that is impacted by the hammer in a rotation direction; a hammer housing portion that houses the hammer; a prop portion arranged on a front side of the grip portion and extending below the motor housing portion or the hammer housing portion; a battery holding portion which is connected to the grip portion and the prop portion and to which a battery pack is detachably attached; and a light emitter unit that is held at a front portion of the hammer housing portion and includes a plurality of light emitters arranged in the rotation direction around the anvil. A lead wire electrically connected to the light emitter unit passes through an inside of the prop portion.

A linear reluctance actor is provided comprising a stator supporting at least one coil and a rotor. The coil is designed as a bifilar winding and the linear actor includes at least one resetting element allowing the rotor to be brought into a predefined initial position after a stroke movement.

Some aspects of the disclosure provide a rotary hammer that is configured to impart impacts to a tool bit. The rotary hammer includes a housing, a motor disposed within the housing, a spindle, and an impact mechanism. The housing includes a first end that can have a handle and a second end that are configured to receive the tool bit. The housing extends along a direct direction between the first and second end. The spindle is disposed within the housing and rotatable by the motor. The spindle defines a spindle axis that is transverse relative to the first direction. The impact mechanism includes a piston and a striker. The piston is at least partially received within the spring for reciprocation therein. The striker is received within the spindle for reciprocation in response to reciprocation of the piston.

To provide a striking tool that offers excellent operability in various positions. [Solution] The striking tool comprises a tool holder, a motor, a drive mechanism, a tool body, a handle, and an operating member. The tool holder extends along the drive shaft. The drive mechanism drives the tip tool linearly along the drive shaft in response to the motor's drive. The tool body houses the tool holder, motor, and drive mechanism. The handle is connected to the tool body and includes a gripping portion extending in a first direction intersecting the drive shaft. The operating member is located on the front side of the gripping portion and is manually operated by the user to signal the motor to start. The gripping portion has a first end closer to the tool body and a second end further away from the tool body in the first direction intersecting the drive shaft. The operating member is positioned to include at least a central position of the gripping portion that is substantially equidistant from the first end and the second end, respectively, in the first direction.

A drive cylinder unit (1) for a power tool (2) with an impact mechanism (3), in particular a pneumatic impact mechanism (3), comprising a drive cylinder (4) axially movably mounted in a guide tube (23) between a front and a rear end position, the drive cylinder being fork-shaped at one end and forming two arms (5) each with a bearing bore (6) in which a bearing pin (7) is rotatably mounted, the bearing pin (7) being penetrated perpendicular to its longitudinal axis by a bore (8) for receiving a pin (9) of a swashplate bearing (10). The drive cylinder (4) is axially pre-tensioned towards the rear end position by means of a spring element (11). A power tool (2) with an impact mechanism (3), in particular a pneumatic impact mechanism (3), comprising a drive cylinder unit (1) according to the invention.

The present invention relates to a method and a device for detecting an impact event of a rotary impact tool comprising a, preferably rotatable, tool shaft (10) which is connected at its free end to a tool, and an impact mechanism configured to exert a rotary and / or axial impact on the tool shaft (10).The method comprises steps for measuring a rotational position and / or rotational speed of a motor output (2, 4) of an electric motor (1) that drives the tool shaft (10) via a percussion mechanism; calculating an acceleration of the motor output (2, 4) of the electric motor (1) based on the rotational position and / or rotational speed of the motor output (2, 4) of the electric motor (1); determining zero crossings of the acceleration of the motor output (2, 4) of the electric motor (1) or determining zero crossings of the derivative of the acceleration (a) of the motor output (2, 4) of the electric motor; and detecting the impact event at a zero crossing determined above.

An impactor that is electrically powered and adapted for use in surgery, comprising, a housing; brushless DC motor that includes a stator with a plurality of coils and a rotor with a plurality of magnets; a motor controller, including a motor driver that delivers current to the coils of the stator so as to turn the rotor about the stator; a planetary gear train that includes an input, a sun gear, a planet gear, a ring gear, and an output; a shaft that includes a shaft section that is provided with an out-of-round cross-sectional shape; and an impacting assembly that includes a driving component and a driven component.