DE102005062693A1 - Hand tool machine e.g. triangular sander for use by handyman, has fan wheel provided for producing cooling air flow for cooling motor, where air flow sucked by fan wheel is partially guided over operating unit - Google Patents

Hand tool machine e.g. triangular sander for use by handyman, has fan wheel provided for producing cooling air flow for cooling motor, where air flow sucked by fan wheel is partially guided over operating unit

Info

Publication number
DE102005062693A1
DE102005062693A1 DE102005062693A DE102005062693A DE102005062693A1 DE 102005062693 A1 DE102005062693 A1 DE 102005062693A1 DE 102005062693 A DE102005062693 A DE 102005062693A DE 102005062693 A DE102005062693 A DE 102005062693A DE 102005062693 A1 DE102005062693 A1 DE 102005062693A1
Authority
DE
Germany
Prior art keywords
air flow
hand tool
cooling air
fan wheel
tool machine
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Withdrawn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
DE102005062693A
Other languages
German (de)
Inventor
Alfred Frech
Steffen Tiede
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
Priority to DE102005062693A priority Critical patent/DE102005062693A1/en
Publication of DE102005062693A1 publication Critical patent/DE102005062693A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B55/00Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition
    • B24B55/06Dust extraction equipment on grinding or polishing machines
    • B24B55/10Dust extraction equipment on grinding or polishing machines specially designed for portable grinding machines, e.g. hand-guided
    • B24B55/105Dust extraction equipment on grinding or polishing machines specially designed for portable grinding machines, e.g. hand-guided with oscillating tools
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23QDETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q11/00Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
    • B23Q11/0042Devices for removing chips
    • B23Q11/0046Devices for removing chips by sucking
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23QDETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q11/00Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
    • B23Q11/12Arrangements for cooling or lubricating parts of the machine
    • B23Q11/126Arrangements for cooling or lubricating parts of the machine for cooling only
    • B23Q11/127Arrangements for cooling or lubricating parts of the machine for cooling only for cooling motors or spindles
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25FCOMBINATION 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
    • B25F5/00Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
    • B25F5/008Cooling means

Abstract

A handheld power tool (10) with a working unit (20), a motor (18) for driving the working unit (20) and a fan wheel (12) for generating a cooling air flow (L) for cooling the motor (18) is proposed. According to the invention, the cooling air flow (L) sucked in by the fan wheel (12) is guided at least partially over the working unit (20).

Description

  • State of technology
  • The The invention relates to a hand tool according to the preamble of the independent claim.
  • It Numerous hand-held power tools are already known, which are a working unit, a motor for driving the working unit and a fan, for generating a cooling air flow for cooling of the engine. For suction of erosion, such as Sanding dust, here are suction fan with another fan provided which a suction air flow from the working unit to a catch container effect. Such a hand tool is, for example from DE-A-10249156 known.
  • Such Hand tool machines are relatively expensive and in particular for home improvement impractical. Although the suction fan are partially within the housing However, these machines are arranged thereby relatively heavy and partly due to the required height an unfavorable Focus on.
  • epiphany the invention
  • The Hand tool according to the invention with the features of the main claim has the advantage that the of fan sucked cooling air flow at least partially over led the work unit is. This is further advantageous that waives a separate suction fan can be, because the cooling air flow for the Engine of the hand tool by the leadership over the work unit as Suction blower acts. this makes possible about that In addition, a lower height the power tool and a lower center of gravity of the same, what a simpler leadership and thus causes better handling. Is the hand tool machine For example, designed as a sander, this tends - by the low center of gravity - less for canting, resulting in a simpler, lighter and safer Machining smooth surfaces is achieved.
  • By in the subclaims listed activities result in advantageous developments and improvements of specified in the main claim features.
  • Especially it is advantageous if the cooling air flow is performed in the field of work unit such that a suction effect scored directly in the working unit is to a maximum Extraction of the Abtrags, for example, the grinding dust in the area to ensure the work unit.
  • In a simple design is the fan - at least indirectly - from drivable to the motor, which drives the working unit, so on a separate engine can be dispensed with.
  • Especially It is advantageous if in the cooling air flow between working unit and engine a catching container for catching the removal is provided from the work unit. In this way, the remains Environment of the hand tool machine spared from dust, and it can longer Time fatigue free to be worked.
  • In a simple and inexpensive execution is between catcher and work unit a movable, in particular elastic, conductors for execution the cooling air flow intended. This is a secure connection between the work unit and catch containers guaranteed which causes a maximum suction effect in the range of the working unit.
  • A particularly low height can be achieved by the fan between the work unit and motor is arranged. That way, beyond that also achieved an optimal suction effect.
  • From It is particularly advantageous if in the cooling air flow between the working unit and motor a filter is provided. As a result, fine dust, for example when grinding can occur, effective filtered from the environment. As a result, for example, is safe Works even with more aggressive cuts possible. Further, too the area of the engine is protected from dust.
  • Around the cooling To improve the engine, it is advantageous if the cooling air flow between filter and fan at least half the longitudinal extent over the engine, since thereby the cooling of the Motors is improved.
  • Farther it is advantageous if the working unit, as a grinder, is designed in particular as a vibrating plate, since the resulting dusts can be easily sucked off as a removal.
  • in this connection it is of particular advantage if the plate has openings through which the cooling air flow to pass through, in order to achieve an optimal suction effect.
  • drawings
  • An embodiment of the invention is illustrated in the drawings and in the following explained in more detail the description. Show it:
  • 1 a schematic representation of the cooling air flow of a hand tool of the invention,
  • 2 a schematic representation of a hand tool of the invention and
  • 3 a partial section through a schematic drawing of a hand tool of the invention.
  • description of the embodiment
  • In 1 is a schematic schematic diagram of a hand tool of the invention 10 shown. This includes a fan 12 as well as a catch container 14 and a filter 16 , The fan wheel 12 is from a motor 18 driven, whereby a cooling air flow L is generated, which is the motor 18 at least partially overflowed for cooling.
  • Furthermore, the hand tool of the invention 10 a work unit 20 on, for example, is designed as a plate on which a grinding wheel for grinding a working medium 22 can be attached. The cooling air flow L is from the working unit 20 in the field of work equipment 22 over the catch container 14 through the filter 16 to the engine 18 guided. In addition, the fan can 12 also an additional air flow LZ on the engine 18 sucking in, not out of the range of the work unit 20 comes.
  • In 2 is a hand tool according to the invention 10 shown in a schematic representation. The motor 18 , which is designed as an electric motor, is in a housing 24 arranged. There are of course other types of motors 18 possible, for example, combustion engines or pneumatic drives. In the case 24 is still the fan 12 arranged by the engine 18 is driven. For this purpose, a drive shaft 26 provided by the engine 18 over the fan wheel 12 out of the case 24 led out. The fan wheel 12 is here directly on the drive shaft 26 , the armature shaft of the motor 18 corresponds, plugged. Of course, here also a gear can be provided, so that the fan 12 can turn at a higher or lower speed than the engine 18 , The output shaft 26 drives at her the engine 18 opposite end a plate 28 as a unit of work and able to put these into vibration.
  • On the drive 18 remote surface of the plate 28 is a grinding wheel 30 Fixed in operation on the workspace 22 For example, a wooden board or a metal support is placed. The plate as a work unit 28 has openings 32 on, by the removal, for example, grinding dust or fine wood dust from the processing, can be sucked off. This is the engine 18 and thus the housing 24 facing area above the housing 24 facing surface of the working unit 28 through a mount 34 limited so that in the housing 24 facing area of the work unit 28 a suction can arise.
  • In the mount 34 There is an opening provided with a conductions 36 , For example, a plastic pipe, corresponds. The conductions 36 has two ends, one end of which is in the area of the enclosure 34 is attached and the other end in the catcher 14 empties. The catcher 14 is formed from a cavity that separates from the filter 16 is completed. Starting from the filter 16 is another cardinal 38 provided the filter 16 with the housing 24 combines. The other conductors 38 is in this case designed such that the cooling air flow L of the working unit 20 with the openings 32 through the conductions 36 in the catch container 14 , from there through the filter 16 and the other conductors 38 in the case 24 in the direction of the engine 18 to be able to flow. There, the cooling air flow L overruns the engine 18 so that it is cooled. Next, the cooling air flow L runs in the direction of the fan wheel 12 and from there radially in the direction of exhaust vents 40 in the housing 24 are attached. This generates the fan 12 a pull, starting from the work unit 20 over the catch container 14 and the filter 16 to the engine 18 so that in the area of the work unit 20 resulting removal, for example, grinding dust, through the openings 32 and the conductions 36 in the catch container 14 is sucked. The mount 34 is in the direction of the work unit 20 not completely sealed, so even outside of the work unit 24 a slight negative pressure is created so that the resulting sanding dust from the environment of the work unit 20 in the catch container 14 is sucked.
  • The filter 16 is designed here as a paper filter, but can also be designed as a fabric filter, plastic filter or as a pleated filter.
  • This does not necessarily have the whole of the fan 12 sucked cooling air from the range of the working unit 20 come. It can, for example, additional ventilation openings 44 be provided, which can form an additional air flow Lz.
  • In 3 is a partial section through a schematic representation of a triangular grinder as a hand tool 10 shown.
  • The motor 18 the hand tool machine 10 sits in the housing 24 , The drive shaft 26 The engine is connected via a gear or a flexible shaft, which are not shown here for the sake of clarity, with the working unit 20 connected and drives this. In addition, coaxial with the drive shaft 26 in the area of the engine 18 the fan wheel 12 arranged, which is designed as a Schaufellüfterrad. This creates a suction that has a cooling air flow L in the region of the engine 18 caused.
  • During operation, the fan wheel rotates 12 allowing air out of the vents 44 is sucked in and in the direction of the engine 18 to the fan 12 flows and thus forms the additional airflow LZ. This results in the housing 24 a negative pressure caused by the size of the vents 44 can be varied. For this purpose, for example, a slider may be provided which the ventilation openings 44 increased or decreased according to its sliding position and thus the negative pressure in the housing 24 increased or reduced accordingly. Likewise, by the dimensioning of the ventilation openings 44 the ratio between the cooling air flow L and additional air flow LZ can be adjusted, which can also be done at the factory, in particular already during construction. For example, it can be ensured that the predominant part of the engine cooling takes place from the cooling air flow L.
  • In the area of the engine 18 is the catcher 14 directly to the housing 24 , especially near the fan wheel 12 , molded, so on another cardigans 38 ( 2 ) can be omitted. The catcher 14 is made by a nozzle-like shape of the housing 24 It is formed by a removable lid 42 locked. In the catch container 14 is the filter 16 used, in particular such that this on the lid 42 is arranged opposite side and thus a bottom of the catching container 14 that forms the engine 18 containing interior of the housing 24 is facing.
  • Between the filter 16 and the lid 42 of the catcher 14 is the conductions 36 led out, which consists of a plastic tube having an elastic bellows structure in its, along its longitudinal extent central region and at its free end directly into the region of the working unit 20 is guided. However, in a variation of the invention, a simple, in particular elastic, hose may also be used as the conductive material 36 serve.
  • During operation, that is, when the fan wheel rotates 12 arises inside the case 24 a negative pressure. This causes the cooling air flow L, which is out of the range of the working unit 20 , in particular from the openings 32 , through the conductions 36 is directed and thus sucks the sanding dust as a removal and in the catcher 14 spends. Further, the cooling air flow L through the filter 16 removed from the removal and passes the engine 18 in the direction of the fan 12 , The fan wheel 12 sucks the cooling air flow L forming air from his the engine 18 facing end face and blows them radially outward. For this purpose, the exhaust air openings 40 in the area of the fan wheel 12 intended.
  • In a variation of the invention, the filter 16 be arranged for example in a plastic or metal frame. The filter can also be designed such that it from the catcher 14 or from the housing 24 removed for cleaning or replacement and can be used again. It is also possible in the catch tank 14 to provide a lateral slot into which the filter 16 can be used.
  • As a hand tool machine 10 Here is a triangle grinder shown. Of course, an orbital sander or an eccentric disc sander can also be provided. It is likewise possible to use a planer or a cut-off grinder or another hand-held power tool 10 form according to the invention.

Claims (10)

  1. Hand tool machine ( 10 ), with a work unit ( 20 ), a motor ( 18 ) for driving the working unit ( 20 ) and a fan ( 12 ), for generating a cooling air flow (L) for cooling the engine ( 18 ), characterized in that the from the fan ( 12 ) sucked cooling air flow (L) at least partially via the working unit ( 20 ) is guided.
  2. Hand tool machine ( 10 ), according to claim 1, characterized in that the cooling air flow (L) in the region of the working unit ( 20 ) is guided in such a way that a suction effect in the region of the working unit ( 20 ) is achieved.
  3. Hand tool machine ( 10 ) according to one of the preceding claims, characterized in that the fan wheel ( 12 ) from the engine ( 18 ) is drivable.
  4. Hand tool machine ( 10 ) according to one of the preceding claims, characterized in that in the cooling air flow (L) between the working unit ( 20 ) and engine ( 18 ) a catching container ( 14 ) for collecting removal from the work unit ( 20 ) is provided.
  5. Hand tool machine ( 10 ) according to claim 4, characterized in that between catching container ( 14 ) and work unit ( 20 ) a movable, in particular elastic, conductions ( 36 ) to through guide the cooling air flow (L) is provided.
  6. Hand tool machine ( 10 ) according to one of the preceding claims, characterized in that the fan wheel ( 12 ) between the work unit ( 20 ) and engine ( 18 ) is arranged.
  7. Hand tool machine ( 10 ) according to one of the preceding claims, characterized in that in the cooling air flow (L) between the working unit ( 20 ) and engine ( 18 ) a filter ( 16 ) is provided.
  8. Hand tool machine ( 10 ) according to claim 7, characterized in that the cooling air flow (L) between filter ( 16 ) and fan wheel ( 12 ) at least half the longitudinal extent of the engine ( 18 ).
  9. Hand tool machine ( 10 ) according to one of claims 8 to 9, characterized in that the working unit ( 20 ) is designed as a grinder, in particular as a vibrating plate.
  10. Hand tool machine ( 10 ) according to claim 9, characterized in that the plate ( 20 ) Openings ( 32 ), through which the cooling air flow (L) is able to pass.
DE102005062693A 2005-12-28 2005-12-28 Hand tool machine e.g. triangular sander for use by handyman, has fan wheel provided for producing cooling air flow for cooling motor, where air flow sucked by fan wheel is partially guided over operating unit Withdrawn DE102005062693A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE102005062693A DE102005062693A1 (en) 2005-12-28 2005-12-28 Hand tool machine e.g. triangular sander for use by handyman, has fan wheel provided for producing cooling air flow for cooling motor, where air flow sucked by fan wheel is partially guided over operating unit

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005062693A DE102005062693A1 (en) 2005-12-28 2005-12-28 Hand tool machine e.g. triangular sander for use by handyman, has fan wheel provided for producing cooling air flow for cooling motor, where air flow sucked by fan wheel is partially guided over operating unit
PCT/EP2006/068477 WO2007080003A1 (en) 2005-12-28 2006-11-15 Hand machine tool

Publications (1)

Publication Number Publication Date
DE102005062693A1 true DE102005062693A1 (en) 2007-07-05

Family

ID=37758860

Family Applications (1)

Application Number Title Priority Date Filing Date
DE102005062693A Withdrawn DE102005062693A1 (en) 2005-12-28 2005-12-28 Hand tool machine e.g. triangular sander for use by handyman, has fan wheel provided for producing cooling air flow for cooling motor, where air flow sucked by fan wheel is partially guided over operating unit

Country Status (2)

Country Link
DE (1) DE102005062693A1 (en)
WO (1) WO2007080003A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009038453A1 (en) * 2007-09-19 2009-03-26 Robert Bosch Gmbh Electric hand tool with improved dust disposal
WO2010020456A1 (en) * 2008-08-20 2010-02-25 Robert Bosch Gmbh Power tool
WO2012090480A3 (en) * 2010-12-27 2012-08-30 Hitachi Koki Co., Ltd. Engine-operated machine
US20130059508A1 (en) * 2011-09-02 2013-03-07 M.B.H. Developpement Electric power device with integrated cooling system for controlling tools

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014024177A (en) * 2012-07-30 2014-02-06 Hitachi Koki Co Ltd Cutter
DE102013202673A1 (en) * 2013-02-19 2014-08-21 Robert Bosch Gmbh hand machine tool device
DE102017004406A1 (en) * 2017-05-09 2018-11-15 Visomax Coating Gmbh Surface treatment apparatus and method for cooling a surface treatment apparatus

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2705388C2 (en) * 1977-02-09 1986-06-05 Robert Bosch Gmbh, 7000 Stuttgart, De
NL8801466A (en) * 1988-06-07 1990-01-02 Emerson Electric Co A device for driving a drilling and / or striking tool.
US4967516A (en) * 1989-12-13 1990-11-06 Ryobi Motor Products Corp. Debris collection system for a surface treating tool
DE4224094A1 (en) * 1992-07-22 1994-01-27 Bosch Gmbh Robert Hand saw with suction device
DE10053582A1 (en) * 2000-10-28 2002-05-16 Bosch Gmbh Robert Hand tool with a dust extraction device
DE102004029220B4 (en) * 2004-06-16 2006-03-23 Hilti Ag Hand tool with dust extraction module

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009038453A1 (en) * 2007-09-19 2009-03-26 Robert Bosch Gmbh Electric hand tool with improved dust disposal
WO2010020456A1 (en) * 2008-08-20 2010-02-25 Robert Bosch Gmbh Power tool
WO2012090480A3 (en) * 2010-12-27 2012-08-30 Hitachi Koki Co., Ltd. Engine-operated machine
US9068504B2 (en) 2010-12-27 2015-06-30 Hitachi Koki Co., Ltd. Engine operated machine
US20130059508A1 (en) * 2011-09-02 2013-03-07 M.B.H. Developpement Electric power device with integrated cooling system for controlling tools

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Publication number Publication date
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