CN1867421B - Power tool - Google Patents
Power tool Download PDFInfo
- Publication number
- CN1867421B CN1867421B CN2004800300621A CN200480030062A CN1867421B CN 1867421 B CN1867421 B CN 1867421B CN 2004800300621 A CN2004800300621 A CN 2004800300621A CN 200480030062 A CN200480030062 A CN 200480030062A CN 1867421 B CN1867421 B CN 1867421B
- Authority
- CN
- China
- Prior art keywords
- housing
- cooling duct
- electric tools
- cooling
- described electric
- 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.)
- Active
Links
- 238000001816 cooling Methods 0.000 claims abstract description 51
- 239000002826 coolant Substances 0.000 description 5
- 238000001746 injection moulding Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 238000009933 burial Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Images
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
- B24B23/02—Portable grinding machines, e.g. hand-guided; Accessories therefor with rotating grinding tools; Accessories therefor
- B24B23/028—Angle tools
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Motor Or Generator Cooling System (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
- Grinding-Machine Dressing And Accessory Apparatuses (AREA)
- Sawing (AREA)
Abstract
The invention relates to a power tool comprising an electric motor arranged in a housing (10) and a cooling device (16, 18, 20, 30, 32). According to the invention, the cooling device (16, 18, 20, 30, 32) comprises a cooling channel (30), at least in sections thereof, that is closed to the inside of the housing (10).
Description
Background technology
The present invention relates to a kind of according to the electric tools of chatting part before the claim 1.
In the grinding machine of angle, undertaken by the air intake of side usually for the suction of the necessary cold air of cool motors, these air intakes are positioned at the rear portion of housing.Also know, additionally on the rear end face of housing, air intake is set.In remaining air guiding portion divided, cold air was inhaled into enclosure interior by a fan that is positioned on the armature shaft.On the distance from the air intake to the air outlet slit, cold air runs into multiple different parts in enclosure interior, they make air circulation to, form eddy current and deceleration.
In different electric tools, housing can be used as handgrip, but the hand that wherein has an operator covers the side air inlet and can only suck by the end face air intake danger of air.These end face air intakes are compared smaller with side ports, therefore can only have little air to arrive in the housing.But the air intake of side can not at random extend or strengthen, because otherwise just may not observe the distance to the interior energising of housing part that requires.
Advantage of the present invention
The present invention relates to a kind of electric tools, it has the motor and the cooling device that are placed in the housing.
Suggestion, this cooling device has a cooling duct with respect to the inner chamber base closed of housing at least partly.Cooling medium, preferably cool off air, can be on purpose by from disturbing the guiding of parts next door in the past.Can reach high flow velocity and high volume flow.The foul that may suck in the cooling air can be avoided foul to deposit on these parts by the next door guiding past from position-sensing unit such as brush or switch.By guided on purpose, the temperature on the motor descends, and this has improved its efficient and life-span.Just in the grinding machine of the angle of high capacity, this structure has remarkable advantage.Cooling duct for base closed should particularly also be interpreted as these cooling ducts, and they have insignificant at least to a great extent opening on fluid technique, as slit, aperture etc.
If the cooling duct enters in the loading plate of motor field frame, this cooling duct can be advantageously just be set when making this loading plate and save the position and process best in this loading plate.
If the cooling duct is covered by a cover plate, the cooling duct of a sealing can be provided, cooling medium is not flowed by the enclosure interior parts can intrusively in this cooling duct.Can easily clean the cooling duct when needed by taking off cover plate.
If cover plate and a motor field frame integrally constitute, can abandon independent cover plate.Its manufacturing is simple especially, and can simply cover plate injection moulding together be got on when motor field frame is made by injection moulding.
If the cooling duct feeds in the suction short tube outstanding from housing, can actually avoid this cooling duct inadvertently to be blocked by electric tools at work.In addition, cold air directly and in the clear arrives in the cooling duct and can directly be directed to the place that needs it.The cross section of cooling duct is variable and is provided with according to the requirement of each electric tools respectively by the professional.But also can conceive in principle, cooling duct or suction short tube and housing evenly stop, and particularly in the zone outside grasping section, can advantageously avoid the foul deposition site thus specifically.
If the suction short tube is placed on the end face of housing, the cooling duct can be supplied to cold air in the clear, even housing is as handgrip.
If the basic straight line in cooling duct extends, cold air arrives motor in the clear, and the parts that are not on the flow path hinder.Seldom occur eddy current on flow path, the feasible foul that may carry seldom can deposit and can keep the high-speed of cooling medium.The cooling medium amount of requirement littler inlet can be set, so that can be provided.
If at least two cooling ducts are set, can realize the better distribution of cooling medium input.The quantity of cooling duct is variable, is selected according to the requirement of each electric tools respectively by the professional.But also can conceive in principle, a cooling duct only is set.
If the air admission passage side and/or end face is set, the parts that can also add enclosure interior cool off, and can not influence the cooling of motor.
Particularly advantageous is that this electric tools is configured to the angle grinding machine, in this angle grinding machine, transships this requirement cooling especially reliably owing to drive unit takes place easily in the principle decision.
Description of drawings
From following description of drawings, draw other advantage.One embodiment of the present of invention shown in the drawings.Accompanying drawing, specification and claims comprise a plurality of features in combination.The technical staff can conform with the destination and investigate single feature and have a mind to the free burial ground for the destitute and be combined into other combination.
Accompanying drawing illustrates:
A preferred angle of Fig. 1 grinding machine,
Fig. 2 is according to the details of a housing of prior art,
Fig. 3 is according to the details of the air of prior art guiding,
One of Fig. 4 has a view of the loading plate of cooling duct of the present invention,
Cooling duct among Fig. 5 Fig. 4 is together with cover plate,
Device among Fig. 6 Fig. 5 is together with the switch of fit on,
One of Fig. 7 has assembled has a housing part of aspirating short tube.
The specific embodiment
Fig. 1 illustrates an electric tools that is preferred angle grinding machine form, has a motor and a cooling device that is placed in the housing 10, and in this electric tools, a suction short tube 20 is placed on the rear end face of housing 10.This angle grinding machine can also add has a handgrip of giving prominence to from housing 10 angledly.Housing 10 itself also is used as handgrip.Motor preferably drives a plug-in type cutter 12 that can be driven in rotation, as an abrasive disc.
Fig. 2 and Fig. 3 represent clear guiding cool air according to prior art.Identical part is in the accompanying drawings in principle with identical reference number mark.This housing 10 is dissectd out, so that the situation of housing 10 inside is clearer.Air by a unshowned fan suction flows in the housing 10 by air intake 18,16 side and end face.The air intake 18 of side can be arranged on the both sides of housing 10.Cold air runs into after in entering housing 10 does not need or only seldom needs the parts such as switch 22 and the electronic installation 24 that cool off.From the out-of-date generation eddy current of these parts 22,24 by-pass flows, they make the cold air braking and make the foul that carries be deposited on the there.Thick arrow in the accompanying drawing (Fig. 2 and Fig. 3) will show, arrives at cold air before the inside of motor field frame 26, just must stream the barrier that is parts 22,24 forms after cold air is entering.Need cold air in motor field frame inside in order to cool off armature and pole shoe.
Express apparatus of the present invention in the accompanying drawing 4 to 7 below.Two cooling ducts 30 enter in the loading plate 28 of motor field frame 26, and motor field frame 26 (Fig. 4) is led in these cooling ducts suction short tube 20 from two end faces 14 that are arranged in housing 10 substantially point-blank.These suction short tubes 20 protrude in outside the housing 10.These cooling ducts 30 are covered (Fig. 5) by a cover plate 32, make to form airtight cooling duct 30.Cover plate 32 can be connected with the edge of cooling duct 30 removably or regularly, and is for example bonding, be threaded or be clamped on the cooling duct 30.Cover plate 32 can be made of a unique part that is used for whole cooling ducts 30, perhaps also can an independent cover plate 32 be set for each cooling duct 30.
Fig. 6 illustrates a switch 22, and it is installed in the housing on cooling duct 30 or cover plate 32.Cold air is not subjected to switch 22 to arrive motor field frame 26 in cooling duct 30 with influencing.
Fig. 7 illustrates a housing that has assembled 10, has the air intake 16,18 of additional, end face and side.The suction short tube 20 of cooling duct 30 that is used for the sealing of housing 10 inside is placed between the air intake 16 of a cable interface 34 and housing 10 end faces 14.
Reference number
10 housings
12 plug-in type cutters
14 end faces
16 air intakes
18 air intakes
20 suction short tubes
22 switches
24 electronic installations
26 motor field frames
28 loading plates
30 cooling ducts
32 cover plates
34 cable interfaces
Claims (8)
1. electric tools, has a motor and a cooling device (16 that is placed in the housing (10), 18,20,30,32), wherein, this cooling device (16,18,20,30,32) have a cooling duct (30) at least partly, it is characterized by with respect to the inner chamber base closed of housing (10), motor field frame (26) is led in described cooling duct (30) the suction short tube (20) from the end face (14) that is arranged in housing (10) substantially point-blank, enter in the loading plate (28) of this motor field frame (26) and and cover, make to form airtight cooling duct (30) by a cover plate (32).
2. according to the described electric tools of claim 1, it is characterized by, cover plate (32) integrally constitutes with a motor field frame (26).
3. according to the described electric tools of claim 1, it is characterized by, this cooling duct (30) feed in the suction short tube (20) outstanding from housing (10).
4. according to the described electric tools of claim 3, it is characterized by, this suction short tube (20) is placed on the end face (14) of housing (10).
5. according to the described electric tools of one of claim 1 to 4, it is characterized by, this cooling duct (30) basic straight line extends.
6. according to the described electric tools of one of claim 1 to 4, it is characterized by, at least two cooling ducts (30) are set.
7. according to the described electric tools of one of claim 1 to 4, it is characterized by, the air intake side and/or end face (16,18) is set.
8. the angle grinding machine has one according to the described cooling device of one of aforementioned claim.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10347943.0 | 2003-10-15 | ||
| DE10347943.0A DE10347943B4 (en) | 2003-10-15 | 2003-10-15 | Power tool |
| PCT/DE2004/002129 WO2005039822A1 (en) | 2003-10-15 | 2004-09-24 | Power tool |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1867421A CN1867421A (en) | 2006-11-22 |
| CN1867421B true CN1867421B (en) | 2010-12-08 |
Family
ID=34441965
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2004800300621A Active CN1867421B (en) | 2003-10-15 | 2004-09-24 | Power tool |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP1677946B1 (en) |
| CN (1) | CN1867421B (en) |
| DE (2) | DE10347943B4 (en) |
| WO (1) | WO2005039822A1 (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102008001250A1 (en) * | 2008-04-18 | 2009-10-22 | Robert Bosch Gmbh | 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 |
| JP5468459B2 (en) * | 2010-05-07 | 2014-04-09 | 株式会社マキタ | Grinder |
| DE202011001475U1 (en) * | 2011-01-13 | 2011-03-17 | Metabowerke Gmbh | Power tool, in particular a grinding or polishing machine |
| US9577493B2 (en) * | 2012-09-20 | 2017-02-21 | Black & Decker Inc. | Motor and electronics cooling system for a high power cordless nailer |
| DE102016210853A1 (en) | 2016-06-17 | 2017-12-21 | Robert Bosch Gmbh | Hand tool with a cooling unit |
| US11139722B2 (en) | 2018-03-02 | 2021-10-05 | Black & Decker Inc. | Motor having an external heat sink for a power tool |
| DE102019207977A1 (en) * | 2019-05-29 | 2020-12-03 | Robert Bosch Gmbh | Cooling device for a hand machine tool |
| US11806857B2 (en) | 2020-08-28 | 2023-11-07 | Black & Decker, Inc. | Airflow intake configuration in power tool |
| DE102021206669A1 (en) | 2021-06-28 | 2022-12-29 | Robert Bosch Gesellschaft mit beschränkter Haftung | hand tool |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB789189A (en) * | 1954-10-30 | 1958-01-15 | Duss Friedrich | Improvements in or relating to portable electric tools |
| CN85103288A (en) * | 1985-05-02 | 1987-01-21 | 神钢电机株式会社 | Milling drum |
| US5099160A (en) * | 1988-07-16 | 1992-03-24 | Robert Bosch Gmbh | Powered hand tool having an enclosed-ventilated drive motor |
| CH692488A5 (en) * | 1996-02-06 | 2002-07-15 | Bosch Gmbh Robert | Hand tool with a header. |
| US6543549B1 (en) * | 1999-05-28 | 2003-04-08 | Hilti Aktiengesellschaft | Electrically driven hand-held tool |
-
2003
- 2003-10-15 DE DE10347943.0A patent/DE10347943B4/en not_active Expired - Lifetime
-
2004
- 2004-09-24 CN CN2004800300621A patent/CN1867421B/en active Active
- 2004-09-24 EP EP04786845A patent/EP1677946B1/en active Active
- 2004-09-24 WO PCT/DE2004/002129 patent/WO2005039822A1/en active Application Filing
- 2004-09-24 DE DE502004011078T patent/DE502004011078D1/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB789189A (en) * | 1954-10-30 | 1958-01-15 | Duss Friedrich | Improvements in or relating to portable electric tools |
| CN85103288A (en) * | 1985-05-02 | 1987-01-21 | 神钢电机株式会社 | Milling drum |
| US5099160A (en) * | 1988-07-16 | 1992-03-24 | Robert Bosch Gmbh | Powered hand tool having an enclosed-ventilated drive motor |
| CH692488A5 (en) * | 1996-02-06 | 2002-07-15 | Bosch Gmbh Robert | Hand tool with a header. |
| US6543549B1 (en) * | 1999-05-28 | 2003-04-08 | Hilti Aktiengesellschaft | Electrically driven hand-held tool |
Also Published As
| Publication number | Publication date |
|---|---|
| DE502004011078D1 (en) | 2010-06-02 |
| EP1677946B1 (en) | 2010-04-21 |
| EP1677946A1 (en) | 2006-07-12 |
| CN1867421A (en) | 2006-11-22 |
| DE10347943A1 (en) | 2005-05-19 |
| WO2005039822A1 (en) | 2005-05-06 |
| DE10347943B4 (en) | 2018-08-23 |
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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 | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |