CN101559588A - Hand-held power tool - Google Patents
Hand-held power tool Download PDFInfo
- Publication number
- CN101559588A CN101559588A CNA2009101327503A CN200910132750A CN101559588A CN 101559588 A CN101559588 A CN 101559588A CN A2009101327503 A CNA2009101327503 A CN A2009101327503A CN 200910132750 A CN200910132750 A CN 200910132750A CN 101559588 A CN101559588 A CN 101559588A
- Authority
- CN
- China
- Prior art keywords
- head piece
- held power
- hand held
- power machine
- added
- 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.)
- Pending
Links
- 241001672694 Citrus reticulata Species 0.000 claims description 21
- 230000001681 protective effect Effects 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 5
- 230000008569 process Effects 0.000 claims description 5
- 230000005587 bubbling Effects 0.000 claims 1
- 239000002245 particle Substances 0.000 description 8
- 238000009423 ventilation Methods 0.000 description 8
- 230000007246 mechanism Effects 0.000 description 5
- 230000008676 import Effects 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 238000000227 grinding Methods 0.000 description 3
- 230000007704 transition Effects 0.000 description 3
- 230000002349 favourable effect Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000003801 milling Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Images
Classifications
-
- 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
- B25F5/008—Cooling means
-
- 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
- B24B23/02—Portable grinding machines, e.g. hand-guided; Accessories therefor with rotating grinding tools; Accessories therefor
-
- 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
- B24B55/00—Safety 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
- B24B55/04—Protective covers for the grinding wheel
- B24B55/045—Protective covers for the grinding wheel with cooling means incorporated
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Harvester Elements (AREA)
- Sawing (AREA)
- Grinding-Machine Dressing And Accessory Apparatuses (AREA)
Abstract
A hand-held power tool comprises a housing, which accommodates a motor and a fan wheel, and a main air inflow opening is arranged in the housing. An additional inflow opening is provided in the housing, which is connected to an air duct, the main air inflow opening communicates to the air duct.
Description
Technical field
The present invention relates to a kind of hand held power machine.
Background technology
The hand held power machine that known electric motor drives, angle grinding machine for example, they have drive motors in housing, and this drive motors drives the cutter shaft of swivel bearing and is fixed on cutter on the cutter shaft.For the motor and brush, bearing and other member that prevent hand held power machine overheated, produce air stream by means of the fan wheel that is arranged in the housing, its mode is, surrounding air imports in the housing by going into head piece, be directed to fan wheel by air guide path and then discharge from housing again in enclosure interior.This air of G stream also can be used to take out of the foul particle in case of necessity, and these foul particles especially produce when the processing work as smear metal.
Usually, air suck by ventilation gaps in the machine hand tool housing in the motor back, the important member next door of motor and other function through and front area at machine in discharge again.This be noted that air by the slit introduce not interrupted, for example since ventilation gaps hidden mistakenly.
Summary of the invention
Task of the present invention is to construct hand held power machine by this way by simple measure: make to guarantee effectively cooling in the long running time period.
According to the present invention, this task solves by a kind of hand held power machine, this hand held power machine has a housing that is used to hold drive motors and fan wheel, have a master and go into a head piece and an air guide path, this air guide path is gone into head piece from the master and is begun in drive motors next door process, leads to fan wheel, wherein, in housing, be provided with one and be added into head piece, this is added into head piece and is connected with described air guide path is through-flow, wherein, this is added into head piece in the flow path of leading between head piece and the fan wheel.
Hand held power machine of the present invention relates in particular to milling drum, as the angle grinding machine, this hand held power machine has a drive motors and a fan wheel that is used to drive rotatably mounted cutter in housing, this fan wheel produces and is used to the air stream that cools off drive motors and also cool off other construction unit in case of necessity.In housing, there is a master to go into head piece, goes into head piece by this master surrounding air is imported to enclosure interior, in housing, constitute one and be used for the air guide path that air flows.Air guide path begins to pass through on the drive motors next door and lead to the fan wheel direction from going into head piece, and this fan wheel produces a negative pressure, and this negative pressure is responsible for making surrounding air to go into head piece through the master and is flowed into.
According to the present invention, in housing, be provided with one and be added into head piece, it is connected with air guide path is through-flow, and wherein, this is added into head piece in the through-flow path of leading between head piece and the fan wheel.
This structure has multiple different advantage.Be added into head piece and guarantee that enough air supplies with, even go into that head piece is hidden by mistake or dirty.Can guarantee in addition, go into the less suck pollution air of head piece by the master, because a part of contaminated air imports enclosure interior by being added into head piece, this makes that the air stream of process contains less foul particle by motor, correspondingly, the contaminated danger of electric machine part is littler.Can improve the service life of hand held power machine in a word thus.
Can keep an emergent air loop by being added into head piece, by it, even more also make air lead to fan wheel through leading becoming a mandarin of head piece.Guarantee that thus fan wheel is resisted sufficiently high air drag rotation, makes the fan wheel rotating speed remain on the desired rotating speed.Because fan wheel is driven by drive motors, also avoided the high rotating speed of not expecting of drive motors thus.This is equivalent to effective motor braking.
Another advantage is, by be added into head piece can make the hot-air of from housing, deriving better, spatial distribution diffusely, this make hot-air enter main go into head piece or be added into head piece before cooling better.The lower temperature levels of overall generation in this hand held power machine.
At last, structure of the present invention makes that also flow noise reduces, because the cross section that always becomes a mandarin that enters machine hand tool housing is obviously increased, keep situation identical or that only improve slightly to be issued to less flowing velocity at air mass flow thus by being added into head piece.But air mass flow also can obviously increase where necessary, in this case, although air mass flow increases, also can not produce the noise that compared with prior art increases.
Be added into head piece and make it possible to be provided for filtering the filter element of air of becoming a mandarin, the unallowed high pressure drop of this air that can not cause becoming a mandarin.Go into head piece and make air by main, especially in this master goes into the zone of head piece, can arrange such filter element, to avoid drive motors or to be subordinated to the pollution of the member of drive motors in drive motors next door process.Reducing of volume flow by compensating through being added into becoming a mandarin of head piece.Also can a filter element be set in being added into the zone of head piece in case of necessity, specifically, perhaps additional setting the except that main filter element of going on the head piece perhaps replaced main filter element of going on the head piece.
According to another favourable structure regulation, be added into head piece in the downstream of drive motors or lead in the air guide path of enclosure interior in the downstream of drive motors at least in part, and mainly go into the upstream that head piece is positioned at drive motors.Guarantee by this way, walk around drive motors by the air mass flow that is added into the head piece importing and import in the housing.This structure be positioned near the cutter shaft of hand held power machine or be added into the combined advantageous particularly of head piece near the cutter, because contain the foul particle of higher share in this case by the part air mass flow that is added into the head piece guiding, these foul particles are walked around drive motors and are imported enclosure interior.Guarantee simultaneously thus: the contaminated air of high relatively share is by being added into the head piece guiding, goes into the foul particle that part air mass flow that head piece far guides from cutter or cutter shaft correspondingly contains less share through main.
In order further to improve the efficient that siphons away the foul particle from the cutter zone, what meet purpose can be to be arranged on the housing downside with being added into contiguous cutter of head piece or cutter shaft.According to another favourable structure, be added into head piece and be arranged on one and become a mandarin and take over, this becomes a mandarin to take over and protrudes in housing outer surface, further improve becoming a mandarin thus.This becomes a mandarin and takes over especially direction to cutter or cutter shaft and tilt and be positioned on the downside of housing, and mainly goes into head piece and meet the destination and be arranged in the rear side zone or be positioned on the housing upper side.The inclination of taking over of becoming a mandarin has improved the tributary targetedly in cutter zone.
According to the another structure that meets purpose, be added into head piece, especially when being configured to become a mandarin adapter, be connected with the cutter zone of hand held power machine by a mobile pipeline.Under possible situation, smear metal can be directly just enough to being added into the guiding of head piece direction through this outlet from the cutter zone when only processing an outlet towards a side that is added into head piece and make at processing work in covering the protective cover of cutter.
Description of drawings
By other claim, accompanying drawing describe and accompanying drawing in learn other advantage and meet the frame mode of purpose.Accompanying drawing illustrates:
The three-dimensional view that Fig. 1 hand held power machine is seen from below has on the housing downside, is added into head piece in the transition part between electric machine casing and the gear mechanism housing,
Fig. 2 has the enlarged drawing of the shell area that is added into head piece,
The side view of the forward part of this hand held power machine of Fig. 3,
The vertical section of this hand held power machine of Fig. 4.
In the accompanying drawings, identical member is provided with identical label symbol.
The specific embodiment
Hand held power machine 1 shown in the accompanying drawing relates in particular to milling drum, for example the angle grinding machine.As from Fig. 1, seeing, this hand held power machine 1 has the housing 2 of a multi-hull type, this housing comprises that an electric machine casing 2a and who is used to hold drive motors is used to hold and the gear mechanism housing 2b of rotatably mounted cutter shaft 3, and this cutter shaft is driven by drive motors.On cutter shaft 3, to fix a cutter.Can on the mounting flange of cutter shaft 3, fix a protective cover in addition.
Ventilation gaps 4 is arranged in the rear side zone of housing, and these ventilation gaps form the master and go into head piece, is used for entering the surrounding air of housing 2 with other member in cooling drive motors and the housing.The surrounding air that flows in housings through these ventilation gaps 4 is left housing again along the air guide path guiding of enclosure interior and through outlet 5, and wherein, outlet 5 is positioned on the upper side of housing and points to the leading flank direction of hand held power machine.This air guide path is passed housing substantially in the vertical and is extended.
On the housing downside, be added in the transition part of head piece 6 between electric machine casing 2a and gear mechanism housing 2b, this is added into head piece and also can sees with enlarged drawing in Fig. 2 and 3.Be added into head piece 6 and be positioned in the adapter 7 that becomes a mandarin (Fig. 3), this wall that becomes a mandarin adapter and electric machine casing 2 constitutes integratedly and protrudes with respect to wall section on every side.Become a mandarin take over 7 to the cutter zone, be that the direction of cutter shaft 3 tilts, obtain thus from the cutter zone to have be added into becoming a mandarin of head piece 6 take over 7 directly, the flow path of straight line.
As seeing according to the profile of Fig. 4, drive motors 8 is accommodated among the electric machine casing 2a.To gear mechanism housing 2b direction one fan wheel 9 is arranged coaxially with drive motors 8, it is driven the drive shaft of motor 8.Fan wheel 9 is directly adjacent with the transition part between electric machine casing 2a and the gear mechanism housing 2b.Produce air stream by fan wheel 9, this air stream use arrow 10a, 10b, 10c and 10d mark and pass enclosure interior to cool off drive motors 8 and to cool off other parts in case of necessity.The mass flow 10a of first passes the air guide path 11 of passing this housing extension in the vertical among the electric machine casing 2a, and the mass flow 10a of this first is a main flow, and it imports in the rear side zone of electric machine casing by ventilation gaps 4 (Fig. 1).Ventilation gaps 11 especially on the lateral surface of drive motors 8 next door through and be parallel to extending axially of drive motors.
What meet purpose can be, in enclosure interior one filter element is set in the zone of ventilation gaps 4, is used for the principal mass stream of the air introduced is filtered.In the zone that is added into head piece 6, generally save filter element, also can meet purpose although one filter element additionally or alternatively is set in this position.
Express a cutter that is not connected with cutter shaft 3 with label symbol 12, the protected cover 13 of this cutter covers with not relatively rotating.Can process an outlet 14 in protective cover 13, the chip particles that will produce below protective cover when the processing work by it is transported to become a mandarin takes over 7 and be added into head piece 6.Outlet under the necessary situation in the protective cover 13 by flow duct 15 with become a mandarin adapter 7 or be added into head piece 6 and be connected.
Claims (11)
1. hand held power machine, has a housing (2) that is used to hold drive motors (8) and fan wheel (9), have a master and go into a head piece (4) and an air guide path (11), this air guide path is gone into head piece (4) from the master and is begun in drive motors (8) next door process, leads to fan wheel (9), it is characterized in that, in housing (2), be provided with one and be added into head piece (6), this is added into head piece and through-flow connection of described air guide path (11), wherein, this is added into head piece (6) and is arranged in main flow path of going between head piece (4) and the fan wheel (9).
2. hand held power machine as claimed in claim 1 is characterized in that, the described head piece (6) that is added into is at least basically in the downstream of drive motors (8) bubbling air guiding channel (11).
3. hand held power machine as claimed in claim 1 or 2 is characterized in that, the described head piece (6) that is added into is arranged than the cutter (12) of leading the more close hand held power machine of head piece (4) (1).
4. as each described hand held power machine in the claim 1 to 3, it is characterized in that, describedly be added into the cutter (12) that head piece (6) is positioned at contiguous hand held power machine (1) on the downside of housing (2).
5. as each described hand held power machine in the claim 1 to 4, it is characterized in that the described head piece (6) that is added into is arranged in the adapter (7) that becomes a mandarin, this adapter (7) that becomes a mandarin protrudes in housing wall.
6. hand held power machine as claimed in claim 5 is characterized in that, the described adapter (7) that becomes a mandarin is tilted to the direction of cutter (12).
7. as each described hand held power machine in the claim 1 to 6, it is characterized in that described master goes into head piece (4) and is arranged in side regions or is positioned on the housing upper side.
8. as each described hand held power machine in the claim 1 to 7, it is characterized in that (10c 10d) derives through the housing upper side described air stream for 10a, 10b.
9. as each described hand held power machine in the claim 1 to 8, it is characterized in that the described head piece (6) that is added into is connected with the cutter zone of hand held power machine (1) by a mobile pipeline (15).
10. as each described hand held power machine in the claim 1 to 9, it is characterized in that described cutter (12) is covered by a protective cover (13), processing one is towards the described outlet (5) that is added into head piece (6) in this protective cover.
11. as each described hand held power machine in the claim 1 to 10, it is characterized in that, go into head piece (4,6) at least one and be provided with filter element.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102008001250.5 | 2008-04-18 | ||
| DE200810001250 DE102008001250A1 (en) | 2008-04-18 | 2008-04-18 | Hand-held power tool e.g. angle grinder, has additional inflow opening which is flow-connected to air duct and arranged in flow path between main inflow opening and fan wheel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101559588A true CN101559588A (en) | 2009-10-21 |
Family
ID=41078435
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2009101327503A Pending CN101559588A (en) | 2008-04-18 | 2009-04-16 | Hand-held power tool |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN101559588A (en) |
| DE (1) | DE102008001250A1 (en) |
| RU (1) | RU2510327C2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102101287A (en) * | 2009-12-18 | 2011-06-22 | 罗伯特.博世有限公司 | Handheld machine tool |
| CN104149096A (en) * | 2014-07-30 | 2014-11-19 | 华南理工大学 | Delta structured parallel manipulator capable of moving precisely and three-dimensionally |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130299207A1 (en) * | 2012-05-10 | 2013-11-14 | Black & Decker, Inc. | Power tool cooling |
| DE102019207977A1 (en) | 2019-05-29 | 2020-12-03 | Robert Bosch Gmbh | Cooling device for a hand machine tool |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1026341A (en) * | 1962-01-24 | 1966-04-20 | John Henry Pierce | Improvements relating to power-operated tools |
| CN2290444Y (en) * | 1997-02-27 | 1998-09-09 | 林智勇 | Dustless angle grinder |
| CN1249225A (en) * | 1998-09-02 | 2000-04-05 | 希尔蒂股份公司 | Electric power tool |
| CN1487650A (en) * | 2002-09-12 | 2004-04-07 | ϣ���ٹɷݹ�˾ | Electric tool machine with fan |
| EP1491290A1 (en) * | 2003-06-27 | 2004-12-29 | Festool GmbH | Portable machine tool |
| EP1541293A1 (en) * | 2003-12-11 | 2005-06-15 | HILTI Aktiengesellschaft | Hand tool |
| CN1636680A (en) * | 2004-01-08 | 2005-07-13 | 株式会社牧田 | Power tools |
| DE102004045917A1 (en) * | 2004-09-20 | 2006-04-06 | Hilti Ag | Hand power tool, e.g. a drill/screwdriver, has slit openings in the housing for air to be drawn in by a gearing projection for a coolant flow over the motor |
| CN1867421A (en) * | 2003-10-15 | 2006-11-22 | 罗伯特·博世有限公司 | Power tool |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU134580A1 (en) * | 1960-04-20 | 1960-11-30 | Б.А. Горюнов | Manual pneumatic angle grinder |
| DE4003029A1 (en) * | 1990-02-02 | 1991-08-08 | Bosch Gmbh Robert | HANDMADE MACHINE TOOL WITH A RADIAL BLOWER |
| US7597157B2 (en) * | 2004-09-24 | 2009-10-06 | Robert Bosch Gmbh | Electric power tool having cooling conduits |
-
2008
- 2008-04-18 DE DE200810001250 patent/DE102008001250A1/en not_active Withdrawn
-
2009
- 2009-04-16 CN CNA2009101327503A patent/CN101559588A/en active Pending
- 2009-04-16 RU RU2009114410/02A patent/RU2510327C2/en not_active IP Right Cessation
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1026341A (en) * | 1962-01-24 | 1966-04-20 | John Henry Pierce | Improvements relating to power-operated tools |
| CN2290444Y (en) * | 1997-02-27 | 1998-09-09 | 林智勇 | Dustless angle grinder |
| CN1249225A (en) * | 1998-09-02 | 2000-04-05 | 希尔蒂股份公司 | Electric power tool |
| CN1487650A (en) * | 2002-09-12 | 2004-04-07 | ϣ���ٹɷݹ�˾ | Electric tool machine with fan |
| EP1491290A1 (en) * | 2003-06-27 | 2004-12-29 | Festool GmbH | Portable machine tool |
| CN1867421A (en) * | 2003-10-15 | 2006-11-22 | 罗伯特·博世有限公司 | Power tool |
| EP1541293A1 (en) * | 2003-12-11 | 2005-06-15 | HILTI Aktiengesellschaft | Hand tool |
| CN1636680A (en) * | 2004-01-08 | 2005-07-13 | 株式会社牧田 | Power tools |
| DE102004045917A1 (en) * | 2004-09-20 | 2006-04-06 | Hilti Ag | Hand power tool, e.g. a drill/screwdriver, has slit openings in the housing for air to be drawn in by a gearing projection for a coolant flow over the motor |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102101287A (en) * | 2009-12-18 | 2011-06-22 | 罗伯特.博世有限公司 | Handheld machine tool |
| CN102101287B (en) * | 2009-12-18 | 2017-09-08 | 罗伯特.博世有限公司 | hand tool |
| US10434635B2 (en) | 2009-12-18 | 2019-10-08 | Robert Bosch Gmbh | Handheld machine tool |
| CN104149096A (en) * | 2014-07-30 | 2014-11-19 | 华南理工大学 | Delta structured parallel manipulator capable of moving precisely and three-dimensionally |
| CN104149096B (en) * | 2014-07-30 | 2016-10-05 | 华南理工大学 | A kind of can the Delta structure parallel manipulator that moves of precision three-dimensional |
Also Published As
| Publication number | Publication date |
|---|---|
| RU2009114410A (en) | 2010-10-27 |
| DE102008001250A1 (en) | 2009-10-22 |
| RU2510327C2 (en) | 2014-03-27 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20091021 |