GB2477037B - Cordless hand tool machine and method of operating a cordless hand tool machine - Google Patents

Cordless hand tool machine and method of operating a cordless hand tool machine

Info

Publication number
GB2477037B
GB2477037B GB1100867.9A GB201100867A GB2477037B GB 2477037 B GB2477037 B GB 2477037B GB 201100867 A GB201100867 A GB 201100867A GB 2477037 B GB2477037 B GB 2477037B
Authority
GB
United Kingdom
Prior art keywords
speed
load mode
tool
operating
rest
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.)
Expired - Fee Related
Application number
GB1100867.9A
Other versions
GB2477037A (en
GB201100867D0 (en
Inventor
Csaba Liptak
Csaba Levai
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of GB201100867D0 publication Critical patent/GB201100867D0/en
Publication of GB2477037A publication Critical patent/GB2477037A/en
Application granted granted Critical
Publication of GB2477037B publication Critical patent/GB2477037B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B23/00—Portable grinding machines, e.g. hand-guided; Accessories therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25F—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
    • B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P7/00—Arrangements for regulating or controlling the speed or torque of electric DC motors
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P29/00—Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors
    • H02P29/40—Regulating or controlling the amount of current drawn or delivered by the motor for controlling the mechanical load
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P31/00—Arrangements for regulating or controlling electric motors not provided for in groups H02P1/00 - H02P5/00, H02P7/00 or H02P21/00 - H02P29/00

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Power Engineering (AREA)
  • Control Of Electric Motors In General (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Control Of Direct Current Motors (AREA)
  • Portable Power Tools In General (AREA)

Abstract

In a cordless hand tool 100 having a drive motor 180 for driving a tool 120, the drive motor 180 is configured to drive the tool 120 at a preset operating speed in the load mode and in the no-load mode and a control unit 170 is provided, configured to reduce the preset operating speed in the no-load mode to a preset at-rest speed. The motor speed is increased to the operating speed from the at-rest speed if the tool 100 changes from the no-load mode to the load mode, e.g. as a portable sanding machine is applied to a workpiece. There may be a preset delay after the tool 100 enters the no-load state before the motor speed is reduced to the at-rest speed, the delay may be between 0.5 and 2.5 seconds. The motor current may be monitored to establish whether the tool 100 is operating in the no-load mode or the load mode. The at-rest speed may be less than 20% to 40% of the operating speed. The operating speed may be a working speed in the load mode or an idling speed in the no-load mode, the idling speed being higher than the at-rest speed. Reducing the no-load motor speed saves power and avoids rapidly discharging a battery pack 190.
GB1100867.9A 2010-01-19 2011-01-18 Cordless hand tool machine and method of operating a cordless hand tool machine Expired - Fee Related GB2477037B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102010001030.8A DE102010001030B4 (en) 2010-01-19 2010-01-19 Cordless hand tool and method for operating a cordless hand tool

Publications (3)

Publication Number Publication Date
GB201100867D0 GB201100867D0 (en) 2011-03-02
GB2477037A GB2477037A (en) 2011-07-20
GB2477037B true GB2477037B (en) 2014-01-08

Family

ID=43736630

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1100867.9A Expired - Fee Related GB2477037B (en) 2010-01-19 2011-01-18 Cordless hand tool machine and method of operating a cordless hand tool machine

Country Status (4)

Country Link
CN (1) CN102152283B (en)
DE (1) DE102010001030B4 (en)
GB (1) GB2477037B (en)
RU (1) RU2011101641A (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6489346B2 (en) * 2014-06-30 2019-03-27 工機ホールディングス株式会社 Electric tool
GB2550923B (en) 2016-05-31 2020-03-18 Darius Development Ltd A cleaner attachment device
US10680494B2 (en) 2016-06-24 2020-06-09 Black & Decker Inc. Control scheme for power tool having a brushless motor
WO2019177753A1 (en) 2018-03-16 2019-09-19 Milwaukee Electric Tool Corporation Blade clamp for power tool
CN213646136U (en) 2018-04-03 2021-07-09 米沃奇电动工具公司 Electric tool
USD887806S1 (en) 2018-04-03 2020-06-23 Milwaukee Electric Tool Corporation Jigsaw
JP6641607B2 (en) * 2018-12-28 2020-02-05 工機ホールディングス株式会社 Electric tool
JP6885455B2 (en) * 2019-12-27 2021-06-16 工機ホールディングス株式会社 Electric tool
WO2022010851A1 (en) 2020-07-06 2022-01-13 Milwaukee Electric Tool Corporation Automatic ramp load sense for power tools
CN113904612B (en) * 2021-08-31 2024-05-14 深圳市华思旭科技有限公司 Electric tool and rotating speed adjusting method

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5863091A (en) * 1981-10-07 1983-04-14 Hitachi Ltd Power-saving circuit of motor
US4574226A (en) * 1983-09-29 1986-03-04 Kress-Electrik Gmbh & Co. Method and apparatus for controlling an electric motor the rotational speed of which is automatically reduced in no-load idling operation
GB2303719A (en) * 1995-07-26 1997-02-26 Black & Decker Inc Control device for an electric motor
CN1500928A (en) * 2002-11-12 2004-06-02 吴玉书 Energy saving protector for idling motor of industrial sewing machine

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10023174A1 (en) * 2000-05-11 2001-11-22 Bosch Gmbh Robert Electric hand tool, e.g. drill with speed control has automatic reset for adjuster, returning it to initial setting in accordance with an operational parameter
DE102004017946A1 (en) * 2004-04-14 2005-11-03 Robert Bosch Gmbh Accumulator-powered hand tool machine
CN1913342A (en) * 2005-08-09 2007-02-14 力山工业股份有限公司 Variable speed control device
DE102007000281A1 (en) * 2007-05-21 2008-11-27 Hilti Aktiengesellschaft Method for controlling a screwdriver

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5863091A (en) * 1981-10-07 1983-04-14 Hitachi Ltd Power-saving circuit of motor
US4574226A (en) * 1983-09-29 1986-03-04 Kress-Electrik Gmbh & Co. Method and apparatus for controlling an electric motor the rotational speed of which is automatically reduced in no-load idling operation
GB2303719A (en) * 1995-07-26 1997-02-26 Black & Decker Inc Control device for an electric motor
CN1500928A (en) * 2002-11-12 2004-06-02 吴玉书 Energy saving protector for idling motor of industrial sewing machine

Also Published As

Publication number Publication date
GB2477037A (en) 2011-07-20
GB201100867D0 (en) 2011-03-02
DE102010001030A1 (en) 2011-07-21
CN102152283B (en) 2016-08-03
CN102152283A (en) 2011-08-17
RU2011101641A (en) 2012-07-27
DE102010001030B4 (en) 2023-07-06

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20150118