Patent application number | Description | Published |
20090151966 | Switching Device For Impact Power Tool - A switching device for an impact power tool includes an input unit, a clutch unit, an output unit and a spring. The clutch unit is cooperated with the spring and located between the input unit and the output unit. The clutch unit includes a clutch disc connected to an input shaft of the input unit and a collar. The output unit includes an output shaft with struck blocks and a pounding member with striking blocks. When the collar is moved and connected with the clutch disc, the input shaft, the pounding member, the collar and the output shaft rotate simultaneously. The output shaft outputs rotation only. When the collar is moved and disengaged from the clutch disc, the input shaft drives the pounding member and the pounding member drives the output shaft to rotate. The output shaft outputs rotation with impact intermittently. | 06-18-2009 |
20090169336 | Locking Device With Quick Release Mechanism - A locking device includes an outer ring in which a clutch disc and a locking disc are respectively connected at two opposite sides thereof A first pad is located on clutch disc and a second pad is located on the first pad. A plurality of balls are located between adjacent first and second protrusions of the first and second pads. A plurality of springs are biased between the far first and second protrusions. A screw bolt connected with a grinding wheel is threadedly extended through the locking disc. When the outer ring is rotated in first direction, the balls do not fall into the recesses defined in the locking disc so as to push the clutch disc to lock the grinding wheel. When the outer ring is rotated in second direction, the balls fall into the recesses and the clutch disc is loosened from the grinding wheel. | 07-02-2009 |
20090277291 | Power Output Mechanism For Power Tools - A power output mechanism for power tools includes a main part for driving an output shaft, a switch unit, an impact unit, a pressing unit, and an operation member. The switch unit has a rotation collar for controlling positions of positioning springs. The impact unit includes an orientation wheel movably connected to the output shaft and an operation wheel secured to the output shaft. The orientation wheel includes a first toothed contact surface which is removably engaged with a second toothed contact surface of the operation wheel. A corrugated ring portion is defined on an outer periphery of the orientation wheel and limited from rotation relative to the output shaft when the positioning springs are moved to certain positions. When the positioning springs are engaged with the orientation wheel, the orientation wheel cannot freely rotate relative to the output shaft so that an impact is output. | 11-12-2009 |
20100319945 | OUTPUT MODE SWITCHING APPARATUS - An output mode switching apparatus including a power unit, a hammering unit, an output shaft, a housing, and a shifting member is provided. The hammering unit includes a gasket cup, a switching ring, a spring member, a hammering seat, and a main shaft. When the power unit is not in operation, the switching ring is restricted so as to be positioned against and secured to the gasket cup. When the mains shaft is driven by the power unit to rotate, the hammering seat is carried to rotate and is applied with a restriction for restricting the hammering seat from axial movement, thus configuring an output mode of electric drill. When the shifting member is turned, the restriction applied to the hammering seat is released. The hammering blocks repetitively hammers the protrusion blocks and axially returns back to the original position, thus configuring an impact output mode. | 12-23-2010 |
20110030984 | MAIN SHAFT LOCKING MECHANISM - A main shaft locking mechanism includes a fixing ring, a main shaft and detents. The main shaft includes an equilateral portion that has an equilateral cross section. A number of the corners of the equilateral portion is equal to that of the detents. The detent has an exterior side and an interior side opposite to the exterior side. The interior side includes two corner protrusions protruded out from two ends thereof and a concave portion defined between the two corner protrusions. The corners of the main shaft are received in the concave portions of the detents. When the main shaft is manually driven to rotate, the corners of the main shaft drive the detents to deviate. Therefore, the exterior sides of the detents interfere against the fixing ring. Then the detents prevent the main shaft from further rotating, thus locking up the main shaft. | 02-10-2011 |
20110053728 | MULTI-GEAR MECHANISM FOR POWER TOOLS - A multi-gear mechanism includes first and second gear sets, an output set, multiple first planet gears pivotably connected between the first and second gear sets, a first gear ring having internal teeth and external teeth, multiple second planet gears cooperated with the internal teeth of the first gear ring, a second gear ring having internal teeth and side teeth, an operation gear ring and a motor gear. The motor gear extends through two central holes of the first and second gear sets, and the first and second planet gears are engaged with the motor gear. The operation gear ring is connected with the second gear ring which drives the operation gear ring to move axially. The motor gear drives the output set at low speed, constant speed or high speed when the operation gear ring and the second gear ring are operated to engage with different gears. | 03-03-2011 |
20110278133 | GAPLESS MAIN SHAFT LOCKING APPARATUS - A gapless main shaft locking apparatus includes a fastening ring, an elastic retaining device, a plurality of detent pins, a driving plate and an output shaft. The elastic retaining device is installed in the fastening ring and has an inner space in which elastic portions and cylinder portions are disposed. Each of the detent pins is disposed between one of the elastic portions and one of the cylinder portions. The driving plate has a central hole, and the periphery of the central hole includes fan-shaped convex portions. A side of the driving plate has a plurality of concave slots for receiving the elastic retaining device. The output shaft includes a polygonal shaft having a regular polygonal cross section. The polygonal shaft passes through the central hole of the driving plate, and each side of the polygonal shaft is contacted with one of the detent pins. | 11-17-2011 |
20130072341 | MULTI-SPEED GEAR SYSTEM FOR POWER TOOL - A multi-speed gear system for a power tool includes a case, a lever, a gear disk, a movable member, a ring gear, a planet gear unit and an idle gear unit. The movable member is axially moved to be engaged with the ring gear, the planet gear unit or the idle gear unit to change the gear ratios and output different speeds. The parts that are engaged with the movable member are located outside of the area where the gears are located, so that the switching between the speeds is smooth and has less friction. | 03-21-2013 |
20130213680 | POWER TOOL HAVING VARIABLE SPEED DEVICE - A power tool includes a variable speed device which can be set in an auto mode or a manual mode. The power tool does not need the user to set the speed when it is operated at the auto mode. The power tool is reset to be the high-speed mode when it is activated. The speed is reduced along with the working load so as to output high torque, maintain the best working efficiency and protect the power tool under the operative status. The power tool can be set to the manual mode so as to work in a single type of function. | 08-22-2013 |