EP2230050A1 - Elektrische motorbetriebene Nagelpistole - Google Patents

Elektrische motorbetriebene Nagelpistole Download PDF

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Publication number
EP2230050A1
EP2230050A1 EP09153570A EP09153570A EP2230050A1 EP 2230050 A1 EP2230050 A1 EP 2230050A1 EP 09153570 A EP09153570 A EP 09153570A EP 09153570 A EP09153570 A EP 09153570A EP 2230050 A1 EP2230050 A1 EP 2230050A1
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EP
European Patent Office
Prior art keywords
flywheel
driving
clutch bar
end portion
clutch
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP09153570A
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English (en)
French (fr)
Inventor
Huading Zhang
Qinyao Zhang
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to EP09153570A priority Critical patent/EP2230050A1/de
Publication of EP2230050A1 publication Critical patent/EP2230050A1/de
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25C—HAND-HELD NAILING OR STAPLING TOOLS; MANUALLY OPERATED PORTABLE STAPLING TOOLS
    • B25C1/00—Hand-held nailing tools; Nail feeding devices
    • B25C1/06—Hand-held nailing tools; Nail feeding devices operated by electric power

Definitions

  • This new invention relates to a handheld power tool, specifically to an electrical motor driven nail gun which impacts a nail or staple into a workpiece.
  • a second design is based on a multiple impact design.
  • a motor or other power source is connected to the impact anvil through either a lost motion coupling or other. This allows the power source to make multiple impacts on the nail thus driving it into the working piece.
  • the disadvantages in this design that include increased operator fatigue since the actuation technique is a series of blows rather than a continuous drive motion.
  • a third design which is taught includes the use of spring as energy storage mechanisms.
  • spring as energy storage mechanisms.
  • the energy is released from the spring into the anvil (or nail driving piece) thus pushing the nail into the substrate.
  • a fourth design that is taught includes the using a flywheel to store energy to drive a fastener; this design is detailed in British Patent # 2,000,716 .
  • This patent teaches the use of a continuously rotating mechanism.
  • the disadvantages in this design include increased operator fatigue by the noisy, continuously rotating mechanism.
  • this uses a friction clutch mechanism that is complicated, heavy and subject to wear.
  • a fifth design uses flywheels as energy storage means.
  • the flywheels are used to launch a hammering anvil that impacts the nail.
  • This design is detailed in U.S Patent # 6,604,666BI.
  • the major drawback to this design is that the flywheels and the clutch mechanisms are asynchronous.
  • the complete mechanism is complicated and a memory of rotating position. It shows that all energy is stored in the flywheel when the rotation angle is within 150 degree. If the operator launches the trigger when the rotation angle is less than 100 degree or if caused by an obstacle, so that the driving of the anvil that impacts the nail is not completed, when the trigger is launched again, the fly wheel will only rotate a 50 degree angle,so that the power which is stored in the fly wheel is not strong enough to drive the nail into the work piece. So it requires design of a complicated circuit to control additional rotating mechanisms (counter rotating), which allow the motor to counter-rotate the 100 degrees to reach the 0 degree( initially location) .
  • This new invention can achieve the driving purpose (impacting the nail) and prevent the disadvantages as above, thereby providing a relative simple operating, steady solution for an electrical motor driven nail gun.
  • the purpose of the new invention can achieve by those technique means as below for an electrical motor driven nail gun. It comprises a bracket, switch, control unit, magazine and nail feed system, also a motor which drives its power from a power supply or rechargeable batteries.
  • the motor drives the flywheel as a speed reduction mechanism, one main characteristic is that the anvil of the driving mechanism is connected to a pitman by a pin axis on one end, and connected on the other end to the pin axis of the driving block which does an arc movement.
  • One end of the drive unit is connected with the tension spring and long board to the long slot in which they have a sliding movement.
  • the clutching mechanism of the speed reduction mechanism controls the circular motion of the driving block to produce linear movement in the drive unit.
  • the above speed reduction mechanism includes a pinion and flywheel which engage each other, the pinion is driven by the motor against a rack formed on the flywheel in one embodiment the rack is formed on an interior peripheral surface of the flywheel.
  • the clutching mechanism comprises a solenoid, cam, and clutch bar and clutch spring, the cam is driven by a solenoid, and the solenoid is controlled by control unit.
  • the clutch bar and spring is assembled in a radial slot on the flywheel, the driving block is settled on the arcuate slot on the slot board, the solenoid drives the cam to move down ,and the bulge of the cam pushes the clutch bar toward the centre of the flywheel against the power of the clutch spring.
  • the above clutch bar has an outer bulge and an inner bulge, the space between them forms a gate, the gate shifts when the clutch block is pushed by the cam.
  • the outer bulge pushes the driving block, the driving block and the pitman start to rotate pushed by the clutch bar which is driven by the high speed rotating flywheel.
  • the above high speed rotating flywheel pushing the driving block by the clutch bar, generates a rotating power due to the law of inertia that is far stronger than the elastic force of the clutch spring and the centrifugal force, so that when the clutch bar leaves the cam, it will not be repositioned by the clutch spring and it able to keep pushing the driving block which will rotate together with the pitman to complete the driving operation.
  • the above flywheel is positioned between the bracket and the slot board, the spring setting in the centre of the slot board, and one end of the spring is connected to the driving block.
  • the cross-section of the driving block has an "I" shape.
  • the upside of the driving block engages one end of the pitman, on the underside is an outer bulge of the driving block, and the middle is positioned in the arcuate slot.
  • the power source of the motor or rechargeable batteries are connected to a main switch and a safety switch in series, the main switch connected in series between control unit and motor, and the safety switch is connected to the control unit.
  • the drive unit driving trigger which completes the main switch, turns off.
  • the results of this invention are: the transmission of the power using a speed reduction mechanism which is engaged by pinion and a flywheel, a large electric current is not needed, so the power and volume of the machine can be much slimmer.
  • the driving mechanism includes a clutching mechanism which has an outer bulge and an inner bulge, controls the anvil impacting on a nail and is returned by a tension spring, no memory function is required; the device is easy and steady for operating.
  • the main switch only works when the safety switch is on. This means safety, steadiness and practicality.
  • Objectives of the present invention include:
  • one preferred embodiment of the invention comprises: a motor (1); means for obtaining electric power from a power source or rechargeable battery; solenoid (2), cam (3), clutch spring (4), driving block (5), clutch bar (6), disengage block (7), pitman (8), flywheel (9), fastener (i. e. Nail, Staple) (10), drive unit (11), tension spring (12), pinion (13), trigger (14), main switch (15), safety switch (16), power source (17), control unit (18), slot board (19), bracket (20), twisting spring (21), twisting spring cover (22), bearing (23), magazine and nail feeding device (201).
  • a motor (1) means for obtaining electric power from a power source or rechargeable battery
  • the power source (17) and drive unit (18) are connected a main switch (15) and a safety switch (16) in series, trigger (14) is directly controlled by the main switch (15).
  • Motor (1) is coupled to an impact mechanism by speed reducing mechanism; the drive unit (11) of the driving mechanism is connected to a pitman (8) by a pin axis (112) on one end, the other end of the pitman is connected with the driving block (5) by pin axis (85), where the driving block does an arc movement during the driving process.
  • the clutching mechanism of the speed reduction mechanism controls the circular motion of the driving block (5) to produce linear movement in the drive unit (11).
  • the clutch mechanism comprises: solenoid (2), cam (3), and clutch spring (4) and driving block (5), clutch bar (6), disengage block (7), which have bulge (33), wall (34), support rod (35) in the coping; the armature (211) of the solenoid (2) is fastened to the support rod (35), which is at the bottom of cam (3), the slot (31) and base plate (32) are fastened to the bracket (20), which allows the cam (3) to slide up and down relative to the slot (31).
  • the clutch block (6) has an outer bulge (61) and inner bulge (62), the space between them providing a gate (63) allowing the driving block (5) to pass through, the clutch block (6) presses the clutch spring (4) and is loaded in a radial slide slot (91) of the flywheel; the two endpoints of fixed axis (191) are fastened to the slot board (19) and bracket (20) respectively, and flywheel (9) is positioned between them; the slot board (19) has a camber slide slot (192) and holes (194), the holes are used for mounting the disengage block (7). Referring to item "193" in the FIG. 4 , it is the initial installing window that introduces the driving block into the camber slide slot.
  • the distance between the inner bulge (62) of the clutch bar (6) and the fixed axis (191) corresponds to the distance between the disengage block (7) and the fixed axis (191), and allows the clutch bar (6) to be pushed by the disengage block (7) when turned to the angular position of the disengage block (7).
  • the cross-section of the driving block (5) has an "I" shape.
  • the upperside (52) of the driving block has a fixed pin axis (85)
  • the underside (51) is coupled to the outer bulge of the driving block (5)
  • the middle part is settled in the arcuate slot (192) of the slot board (19), and holds the driving block (5) fixed in the slot board and allows it to slide relatively.
  • the driving mechanism comprises: the drive unit (11) of the driving mechanism connected to a pitman (8) by a pin axis (85) on one end, and connected on the other end to the pin axis (85) of the driving block (5) which does an arcuate movement.
  • One end of the drive unit (11) is connected with the tension spring (12) and long board (111) to the long slot in which they have a sliding movement.
  • the clutching mechanism of the speed reduction mechanism controls the circular motion of the driving block (5) to produce linear movement in the drive unit (11).
  • the speed reduction mechanism includes a pinion (13) and flywheel (9) which engage each other, the pinion (13) is driven by the motor against a circular rack formed, in one embodiment, on an interior peripheral surface of the flywheel (9) ,and the flywheel (9) is rotated around a fixed axis (191).
  • the gun works as follows: It uses a motor with an electrical source or chargeable battery output power source for driving.
  • the safety switch (16) is squeezed, the main switch (15), and drive unit (18) start working, an electronic circuit connects a motor (1) via pinion (13) driving the flywheel (9) rotating at a high speed.
  • the control unit (18) When the flywheel (9) is rotating at an enactment speed and the trigger is depressed, the control unit (18) will send a actuation signal to the solenoid (2), the solenoid retracts and the driving cam (3) moves down, allowing the elastic force of the clutch spring (4) to exert pressure on the face of inner bulge (62) of the clutch bar (6) and push it towards the center of a circle of the flywheel along a radial runner (193).
  • the outer bulge (61) comes into space of the arcuate slot (192), the face B2 of the clutch bar (6) contacts the face B1 of the driving block (5).
  • the rotational flywheel (9) pushes the driving block (5), by the clutch bar (6), to travel around the arcuate slot (192) pulling the axially connected pitman (8).
  • the drive unit (11) also moves to its far point driving the fastener (10), and the tension spring (12) and torsion spring (24) save energy to a maximum.
  • the clutch bar (6) and the face C1 of inner bulge is pushed back to original position by the face C2 of the disengage block (7), the gate (63) moves back to a position beneath of the arcuate slide slot (192), and the driving block (5) loses impulse from the flywheel (9) and after having liberated momentary energy, it is returned to its starting point.
  • the system can return to the initial state, without needing any memory of the rotating state.
EP09153570A 2009-02-25 2009-02-25 Elektrische motorbetriebene Nagelpistole Withdrawn EP2230050A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP09153570A EP2230050A1 (de) 2009-02-25 2009-02-25 Elektrische motorbetriebene Nagelpistole

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP09153570A EP2230050A1 (de) 2009-02-25 2009-02-25 Elektrische motorbetriebene Nagelpistole

Publications (1)

Publication Number Publication Date
EP2230050A1 true EP2230050A1 (de) 2010-09-22

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Family Applications (1)

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EP09153570A Withdrawn EP2230050A1 (de) 2009-02-25 2009-02-25 Elektrische motorbetriebene Nagelpistole

Country Status (1)

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EP (1) EP2230050A1 (de)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090250500A1 (en) * 2008-04-03 2009-10-08 Brendel Lee M Cordless framing nailer
EP2789427A1 (de) * 2013-03-12 2014-10-15 Black & Decker Inc. Mehrsträngige Rückstellfeder für Befestigungswerkzeug
EP2979821A1 (de) * 2014-07-28 2016-02-03 Black & Decker, Inc. Elektrowerkzeug-antriebsmechanismus
US9346158B2 (en) 2012-09-20 2016-05-24 Black & Decker Inc. Magnetic profile lifter
US9399281B2 (en) 2012-09-20 2016-07-26 Black & Decker Inc. Stall release lever for fastening tool
TWI670150B (zh) * 2014-08-28 2019-09-01 日商工機控股股份有限公司 釘入機
US11179836B2 (en) 2012-05-31 2021-11-23 Black & Decker Inc. Power tool having latched pusher assembly
US11229995B2 (en) 2012-05-31 2022-01-25 Black Decker Inc. Fastening tool nail stop
WO2023071258A1 (zh) * 2021-10-25 2023-05-04 台州市大江实业有限公司 一种易维修型射钉枪

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2000716A (en) 1977-07-05 1979-01-17 Duo Fast Corp Impact tool
US6604666B1 (en) 2001-08-20 2003-08-12 Tricord Solutions, Inc. Portable electrical motor driven nail gun
US6705503B1 (en) 2001-08-20 2004-03-16 Tricord Solutions, Inc. Electrical motor driven nail gun
US20040232194A1 (en) * 2002-03-07 2004-11-25 Pedicini Christopher S. Enhanced electrical motor driven nail gun
US6971567B1 (en) * 2004-10-29 2005-12-06 Black & Decker Inc. Electronic control of a cordless fastening tool

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2000716A (en) 1977-07-05 1979-01-17 Duo Fast Corp Impact tool
US6604666B1 (en) 2001-08-20 2003-08-12 Tricord Solutions, Inc. Portable electrical motor driven nail gun
US6705503B1 (en) 2001-08-20 2004-03-16 Tricord Solutions, Inc. Electrical motor driven nail gun
US20040232194A1 (en) * 2002-03-07 2004-11-25 Pedicini Christopher S. Enhanced electrical motor driven nail gun
US6971567B1 (en) * 2004-10-29 2005-12-06 Black & Decker Inc. Electronic control of a cordless fastening tool

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090250500A1 (en) * 2008-04-03 2009-10-08 Brendel Lee M Cordless framing nailer
US8534527B2 (en) * 2008-04-03 2013-09-17 Black & Decker Inc. Cordless framing nailer
US8939342B2 (en) 2008-04-03 2015-01-27 Black & Decker Inc. Cordless framing nailer
US9216502B2 (en) 2008-04-03 2015-12-22 Black & Decker Inc. Multi-stranded return spring for fastening tool
US11229995B2 (en) 2012-05-31 2022-01-25 Black Decker Inc. Fastening tool nail stop
US11179836B2 (en) 2012-05-31 2021-11-23 Black & Decker Inc. Power tool having latched pusher assembly
US9346158B2 (en) 2012-09-20 2016-05-24 Black & Decker Inc. Magnetic profile lifter
US9399281B2 (en) 2012-09-20 2016-07-26 Black & Decker Inc. Stall release lever for fastening tool
EP2789427A1 (de) * 2013-03-12 2014-10-15 Black & Decker Inc. Mehrsträngige Rückstellfeder für Befestigungswerkzeug
US10022848B2 (en) 2014-07-28 2018-07-17 Black & Decker Inc. Power tool drive mechanism
US10766128B2 (en) 2014-07-28 2020-09-08 Black & Decker Inc. Power tool drive mechanism
EP2979821A1 (de) * 2014-07-28 2016-02-03 Black & Decker, Inc. Elektrowerkzeug-antriebsmechanismus
TWI670150B (zh) * 2014-08-28 2019-09-01 日商工機控股股份有限公司 釘入機
WO2023071258A1 (zh) * 2021-10-25 2023-05-04 台州市大江实业有限公司 一种易维修型射钉枪

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