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1. (EP2391483) Electric boring tool

Office : European Patent Office
Application Number: 10710459 Application Date: 01.02.2010
Publication Number: 2391483 Publication Date: 07.12.2011
Publication Kind : B1
Designated States: AT,BE,BG,CH,CY,CZ,DE,DK,EE,ES,FI,FR,GB,GR,HR,HU,IE,IS,IT,LI,LT,LU,LV,MC,MK,MT,NL,NO,PL,PT,RO,SE,SI,SK,SM,TR
Prior PCT appl.: Application Number:JP2010000581 ; Publication Number: Click to see the data
IPC:
B25D 16/00
B23B 45/02
B25F 5/00
H02P 6/06
H02P 23/03
H02P 27/06
H02P 27/08
B PERFORMING OPERATIONS; TRANSPORTING
25
HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; HANDLES FOR HAND IMPLEMENTS; WORKSHOP EQUIPMENT; MANIPULATORS
D
PERCUSSIVE TOOLS
16
Portable percussive machines with superimposed rotation
B PERFORMING OPERATIONS; TRANSPORTING
23
MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
B
TURNING; BORING
45
Hand-held or like portable drilling machines, e.g. drill guns; Equipment therefor
02
driven by electric power
B PERFORMING OPERATIONS; TRANSPORTING
25
HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; HANDLES FOR HAND IMPLEMENTS; WORKSHOP EQUIPMENT; MANIPULATORS
F
COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
5
Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
H ELECTRICITY
02
GENERATION, CONVERSION, OR DISTRIBUTION OF ELECTRIC POWER
P
CONTROL OR REGULATION OF ELECTRIC MOTORS, GENERATORS, OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS OR REACTORS OR CHOKE COILS
6
Arrangements for controlling synchronous motors or other dynamo-electric motors with electronic commutators in dependence on the rotor position; Electronic commutators therefor
06
Arrangements for speed regulation of a single motor wherein the motor speed is measured and compared with a given physical value so as to adjust the motor speed
H ELECTRICITY
02
GENERATION, CONVERSION, OR DISTRIBUTION OF ELECTRIC POWER
P
CONTROL OR REGULATION OF ELECTRIC MOTORS, GENERATORS, OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS OR REACTORS OR CHOKE COILS
23
Arrangements or methods for the control of ac-motors characterised by a control method other than vector control
03
specially adapted for very low speeds
H ELECTRICITY
02
GENERATION, CONVERSION, OR DISTRIBUTION OF ELECTRIC POWER
P
CONTROL OR REGULATION OF ELECTRIC MOTORS, GENERATORS, OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS OR REACTORS OR CHOKE COILS
27
Arrangements or methods for the control of ac-motors characterised by the kind of supply voltage
04
using variable-frequency supply voltage, e.g. inverter or converter supply voltage
06
using dc to ac converters or inverters
H ELECTRICITY
02
GENERATION, CONVERSION, OR DISTRIBUTION OF ELECTRIC POWER
P
CONTROL OR REGULATION OF ELECTRIC MOTORS, GENERATORS, OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS OR REACTORS OR CHOKE COILS
27
Arrangements or methods for the control of ac-motors characterised by the kind of supply voltage
04
using variable-frequency supply voltage, e.g. inverter or converter supply voltage
06
using dc to ac converters or inverters
08
with pulse width modulation
CPC:
B23B 45/02
B25D 16/006
B25D 2211/061
B25D 2222/72
B25D 2250/055
B25D 2250/095
B25D 2250/201
B25D 2250/221
B25D 2250/255
H02P 6/06
H02P 23/03
H02P 27/08
Y02P 70/173
Applicants: HITACHI KOKI KK
Inventors: OOKUBO TAKAHIRO
IWATA KAZUTAKA
Priority Data: 2009021661 02.02.2009 JP
2010000581 01.02.2010 JP
Title: (DE) Elektrisches Bohrwerkzeug
(EN) Electric boring tool
(FR) Outil de forage électrique
Abstract: front page image
(EN) An electric boring tool(1) comprises an electric motor (40), a switch trigger(61), a tip tool (20) driven by driving force of the electric motor(40), a power transmission mechanism (14) for transmitting the driving force of the electric motor (40) to the tip tool (20) as rotational force and/or hammer force, and a motor control unit (50, 55) for controlling speed of the electric motor (40) in response to an extent of pulling of the switch trigger (61). The motor control unit (50, 55) subjects the electric motor (40) to low speed control (109, 126) after the electric motor (40) is started up, and controls the speed of the electric motor (40) in response to the extent of pulling of the switch trigger (61)when the load current (107) of the electric motor is set value or greater during the low speed control (109).
(FR) L'invention concerne un outil à aléser électrique (1) qui comprend un moteur électrique (40), une gâchette de commutateur (61), un outil à pointe (20) entraîné par la force motrice du moteur électrique (40), un mécanisme de transmission de puissance (14) pour transmettre la force motrice du moteur électrique (40) à l'outil à pointe (20) comme force rotative et/ou de martèlement, et une unité de commande de moteur (50, 55) réglant la vitesse du moteur électrique (40) en réaction à une traction donnée sur la gâchette du commutateur (61). L'unité de commande du moteur (50, 55) soumet le moteur électrique (40) à une régulation de vitesse peu élevée (109, 126) après le démarrage du moteur électrique (40), et règle la vitesse du moteur électrique (40) en réaction à une traction donnée sur la gâchette du commutateur (61) lorsque le courant de charge (107) du moteur électrique prend une valeur déterminée ou supérieure durant la régulation de vitesse peu élevée (109).