CN101722507B - Air introduction window for electric power tools - Google Patents
Air introduction window for electric power tools Download PDFInfo
- Publication number
- CN101722507B CN101722507B CN2009101625019A CN200910162501A CN101722507B CN 101722507 B CN101722507 B CN 101722507B CN 2009101625019 A CN2009101625019 A CN 2009101625019A CN 200910162501 A CN200910162501 A CN 200910162501A CN 101722507 B CN101722507 B CN 101722507B
- Authority
- CN
- China
- Prior art keywords
- air
- air channel
- vent window
- motor case
- cover
- 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
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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
Abstract
The present invention includes an air introduction window mainly used for introducing cooling air from outside into a main body housing to cool an electric motor. In prior art, because the flow paths are bent in the course of flowing from the air passages of the cover to the air passages of the main body housing, it is possible to prevent intrusion of dust, etc. into the main body housing. Therefore, there is a need in the art to provide the air introduction window having an improved dustproof performance without increasing the tool length. An air passage 31 with a bent passage is arranged on the cover 21 of a brush holder unit 20; a bent passage is arranged on the air passage (32) of a motor housing 10a; and two air passages are bent along the sheet direction. Accordingly, a bent passage is formed between two air passages (31, 32). It is possible to obtain more improve dustproof performance without accompanying degradation in air introduction performance through three layered bent passages.
Description
Technical field
The present invention relates to a kind of vent window, it is arranged on as in the hand held electric tool that is called as electric hammer, is mainly used in inside importing cooling air.
Background technology
Built-in motor with this as drive source electric tool, particularly hand held electric tool in, in order to use the extraneous air cool motors, people have thought multiple way.Most methods are, for example vent window is set, and adopts cooling fan etc. cold air to be imported fuselage interior, make cold air come cool motors to the preceding side flow of body shell from the outside via this vent window at the rear portion of housing, then, from the outside exhaust in the front portion of body shell.This method had both needed to import extraneous air effectively from the vent window that is used to import extraneous air, needed again to prevent as much as possible that dust etc. from entering fuselage interior.In the prior art,, in following patent documentation, disclose the technology that a kind of cooling air quantity that does not reduce motor just can prevent that dust etc. from entering as the technology relevant with this vent window.The vent window 70 of having represented disclosed prior art in the following patent documentation among Fig. 7.The structure of the vent window 70 of the prior art is, offers in body shell 71 rear sections to be equipped with cover 75, and staggering mutually with the air channel 76～76 of cover 75 in the air channel 72～72 of body shell 71, thereby makes ventilating path be bended.The air channel 72 of body shell 71 and all not bendings of the air channel 76 of cover 75, but straight ventilating path.
If adopt the vent window 70 of the prior art, flow into extraneous airs in the air channel 76 of cover 75 air channel 76 in after the streamlined flow piping and druming on body shell 71 and bend towards left and right side, next, streamlined flow and being blown in the body shell 71 in the air channel 72 of body shell 71.Like this, externally air is from covering 75 air channel 76 to the process in the air channel 72 of body shell 71, because ventilating path bends, enters in the body shell 71 so can hinder dust etc.
Patent documentation 1: Japanese patent of invention open communique spy open flat 7-266260 number
Yet when adopting above-mentioned prior art, the ventilating path in 71 from the extraneous air air inlet to body shell, only therefore bending once, can not prevent thoroughly that sometimes dust from entering the situation generation of body shell inside in ventilating path.In addition,, can not guarantee enough ventilations like this, therefore cool motors fully although also can reduce the amount that dust etc. enters by the flow path area that reduces each air channel.In addition, although also can suppress entering of dust etc. by for example establish filter such as mesh in addition on the outer surface of cover, this can cause the length of machine to increase again.
Summary of the invention
Therefore, the objective of the invention is to, do not cause again further improving the anti-dust performance of vent window under the situation that machine length increases neither destroying performance of ventilating (cooling performance).
Therefore, the invention provides the vent window of structure that each technical scheme is put down in writing in claims.
Technical scheme 1 of the present invention is, a kind of vent window, be used in the motor case of the electric tool that is built-in with motor, importing extraneous air, wherein, described vent window is arranged on the duplex that is made of described motor case and the cover that covers this motor case, be positioned at described cover and be provided with first air channel, be positioned at described motor case and be provided with second air channel, at least two air passage portions bendings in the 3rd air channel of ventilating path between described first air channel, described second air channel or two air channels.
Technical scheme 2 of the present invention is, on the basis of technical scheme 1, ventilating path respectively in described first air channel, three air channels place's bending of described second air channel and described the 3rd air channel.
Technical scheme 4 of the present invention is, on the basis of technical scheme 1, the brushgear housing unit is installed in described motor case rear portion, with the cover that covers this brushgear housing unit is the described cover that constitutes the covering motor case of described duplex, that is, cover and the described motor case by this brushgear housing unit constitutes described duplex.
The vent window of being put down in writing according to technical scheme 1, ventilating path is in second air channel of first air channel of described cover, described motor case and at least two air passage portions bending in totally three air channels of the 3rd air channel between two air channels, therefore, compare with the bending path that is provided with and forms of staggering mutually, the straight air channel of allowing of prior art, has a plurality of bendings path, therefore, the area of section by each path of suitable assurance, can under the situation that does not reduce performance of ventilating, improve anti-dust performance with respect to prior art.
According to the vent window that technical scheme 2 is put down in writing, ventilating path all bends in three air channels, therefore can further improve the anti-dust performance of vent window.
The vent window of being put down in writing according to technical scheme 3, the bending of one place is respectively arranged in the position, three air channels of ventilating path, thereby extraneous air imports motor case in via the bending part of three crooked place totally, in terms of existing technologies, can significantly improve the anti-dust performance of vent window.
The vent window of being put down in writing according to technical scheme 4, utilize the cover of brushgear housing used in the prior art unit to constitute described vent window, therefore, neither can cause bigger cost to increase, can not cause that again machine length becomes big, also can improve the anti-dust performance of vent window.
Description of drawings
Fig. 1 is the unitary side view of electric tool with vent window of first embodiment.Among this figure, the internal structure of vent window periphery is represented with longitudinal section.
Fig. 2 is the longitudinal section of the vent window periphery of first embodiment.
Fig. 3 is the longitudinal section in each air channel in the vent window of first embodiment.Among this figure, schematically shown the bending state in each air channel.In addition, in the actual production process of vent window, can consider that factors such as withdrawing pattern set the width dimensions in air channel, thereby produce vent window with cheap price.
Fig. 4 is the longitudinal section in each air channel in the vent window of second embodiment.Among this figure, schematically shown the bending state in each air channel.In addition, in the actual production process of vent window, can consider that factors such as withdrawing pattern set the width dimensions in air channel, thereby produce vent window with cheap price.
Fig. 5 is the longitudinal section in each air channel in the vent window of the 3rd embodiment.Among this figure, schematically shown the bending state in each air channel.In addition, in the actual production process of vent window, can consider that factors such as withdrawing pattern set the width dimensions in air channel, thereby produce vent window with cheap price.
Fig. 6 is the longitudinal section in each air channel in the vent window of the 4th embodiment.Among this figure, schematically shown the bending state in each air channel.In addition, in the actual production process of vent window, can consider that factors such as withdrawing pattern set the width dimensions in air channel, thereby produce vent window with cheap price.
Fig. 7 is the longitudinal section in each air channel in the vent window of prior art.
[description of reference numerals]
1: electric tool (electric hammer); 2: fuselage; 2a: body shell; 3: handle; 4: cutter head (bit); 10: motor; 10a: motor case; 11: rotor; 11a: armature spindle (the axis of rotation J of motor 10); 11b: commutator; 12: stator; 13: bearing; 20: the brushgear housing unit; 21: cover; 22: cover (the 3rd embodiment); 30: vent window (first embodiment); 31: the first air channels; 31a: air inlet; 31b: air outlet; 32: the second air channels; 32a: air inlet; 32b: air outlet; 33: the three air channels; 40: vent window (second embodiment); 41: the three air channels; 50: vent window (the 3rd embodiment); 51: the first air channels (the 3rd embodiment); 51a: air inlet; 51b: air outlet; 60: vent window (the 4th embodiment); 61: the second air channels; 61a: air inlet; 61b: air outlet.
The specific embodiment
Below, with reference to Fig. 1～Fig. 6 the specific embodiment of the present invention is described.Fig. 1 represents to be provided with the whole electric tool 1 of the vent window of present embodiment.In the present embodiment, as an example of electric tool 1, illustration be used to cut a hole the electric hammer of cutting operation etc.This electric tool 1 comprises the handle 3 of fuselage 2 and D shape.Fuselage 2 comprises: be used for ram that the cutter head 4 that is installed in the top is clashed into; By compressed air this ram is applied impact and pistons reciprocating; Make the linkage of this reciprocating motion of the pistons; Motor 10 as the drive source that this linkage is applied rotary power.Except motor 10, all the other each mechanisms and parts all are arranged among the columnar body shell 2a.Cutter head 4 is configured to from the outstanding state in the top of this body shell 2a.Be used to take in the motor case 10a of motor 10 and fuselage 2 and handle 3 and link together, be across the state between fuselage 2 rear portions and handle 3 front portions.In the present embodiment, the axis of rotation J of motor 10 and the crash direction (piston moves back and forth direction) of cutter head 4 vertical (longitudinal motor).Basic structure with the fuselage 2 of this L type main body and handle 3 is same as the prior art, therefore omits specifying it.
The bottom of motor case 10a is provided with so-called brushgear housing unit 20.This brushgear housing unit 20 is assembled as follows, that is, on the cover 21 that covers motor case 10a bottom, be provided with the pair of right and left carbon brush (not shown) that is slidingly connected on the commutator 11b, in addition, also be assembled with and stator 12 connection terminals and necessary distribution etc.If this brushgear housing unit 20 is arranged on the bottom of motor case 10a, then can disposablely finish assembling operation between carbon brush and the commutator 11b and the wiring operation essential to stator 12.Because this brushgear housing unit 20 is existing known technology, therefore omit specifying to it.
By the cover 21 that this brushgear housing unit 20 is set, make the bottom of motor case 10a become structure of the dual end.Present embodiment has characteristics as follows, that is, utilize this dual end to construct cooling air (extraneous air) air inlet (vent window 30) that is mainly used in cool motors 10 is set.In addition, the cooling air that enters in the motor case 10a via this vent window 30 flows and cool motors 10 up, discharges via near the exhaust outlet (omitting diagram) that is arranged on the body shell 2a rear portion thereafter.
The concrete structure of the vent window 30 of present embodiment is illustrated among Fig. 2.This vent window 30 comprises: first air channel 31 and second air channel 32 that is positioned at motor case 10a side that are positioned at cover 21 sides.In addition, having the gap that is used to ventilate between cover 21 and the motor case 10a, works as the 3rd air channel 33 in this gap.
To air outlet 31b (upside), its ventilating path is bent into bended from its air inlet 31a (downside) in first air channel 31.To air outlet 32b (upside), its ventilating path also is bent into bended from its air inlet 32a (downside) in second air channel 32.In addition, the air inlet 32a of the 3rd air channel 33 from the air outlet 31b in first air channel 31 to second air channel 32, its ventilating path also is bent into bended.The concrete condition of described ventilating path is presented among Fig. 3 in understandable mode.Among Fig. 3, cover 21 downside is an extraneous air, and the upside of motor case 10a be the inside of this motor case 10a, and motor cools off wind from downside side flow up.In addition, in this specification, the meaning that ventilating path is bent into bended is meant that air inlet and air outlet misplace along paper direction (being left and right directions among Fig. 3) mutually, thereby have the part of keeping out the wind in ventilating path.Relative therewith, in this specification air inlet and air outlet are not called " straight line path " along the linear pattern ventilating path of paper direction dislocation mutually.
In the vent window 30 shown in Figure 3, the extraneous air that flows into from the air inlet 31a in first air channel 31 bend once (first bends the path) this first air channel 31.The extraneous air that flows out from the air outlet 31b in first air channel 31 bend for the second time (second bends the path) during being extended down to the 3rd air channel 33 of air inlet 32a.The extraneous air that flows into the air inlet 32a in second air channel 32 bends for the third time in this second air channel 32, via air outlet 32b inflow motor shell 10a and mobile up, motor 10 is cooled off in the process of flowing up then.Like this, via vent window 30 from covering 21 the outside to the ventilating path of motor case 10a inside, ventilating path three positions bendings, thus, can prevent more effectively that in terms of existing technologies dust from entering motor case 10 inside altogether.In addition, also fully guarantee the total draught area in each air channel 31,32,33, thereby can fully guarantee the ventilation of this vent window 30.
By adopting the vent window 30 of said structure, totally three layers of bending path are set in the structure of the dual end of motor case 10a and cover 21 formations, therefore, can fully guarantee the draught area of each layer, so neither can cause performance of ventilating to descend, can improve anti-dust performance in terms of existing technologies again.
In addition, by adopting present embodiment, by motor case 10a be arranged in the structure of the dual end that the cover 21 of the brushgear housing unit 20 at this motor case 10a rear portion constitutes, form three layers of bending path, therefore, do not need to establish in addition new parts such as filter, but utilize existing parts used in the prior art, therefore, neither can cause bigger cost increase and machine length to become big, can obtain above-mentioned action effect again.
In addition, can carry out various changes to the embodiment of above explanation.For example, but the structure of the dual end that image pattern 4～be provided with as shown in Figure 6 is made of the cover 21 of motor case 10a and brush carrier unit 20 equally.
For the vent window 40 of second embodiment shown in Figure 4, different with described vent window 30 is, is not the path of bending at the motor case 10a and the 3rd air channel 41 of covering between 21, but straight line path.Other aspects of vent window 40 are identical with described vent window 30, therefore adopt identical Reference numeral and omit explanation to it.Because the 3rd air channel 41 is a straight line path, therefore, the air inlet 32a in the air outlet 31b in first air channel 31 and second air channel 32 does not stagger mutually, but the position consistency on the left and right directions (alignment).Therefore, the extraneous air that flows into from air inlet 31a bends once first air channel 31, flows out from air outlet 31b then, next, does not bend but streamlined flow in the 3rd air channel 41, flows to the air inlet 32a in second air channel 32.The extraneous air that flows into from air inlet 32a bends once second air channel 32 again, flows out from air outlet 32b then, flows in the motor case 10a.
Like this, by the vent window 40 that adopts second embodiment, in the structure of the dual end that the cover 21 by motor case 10a and brushgear housing unit 20 constitutes, form 31,32, the 41 3 layers of ventilating path in first～the 3rd air channel, wherein, in the two-layer ventilating path in first, second air channel 31,32, ventilating path bends.Therefore, only form the prior art that bends the path with the importing direction of extraneous air and compare, can improve the anti-dust performance of this vent window 40 at one deck.
For the vent window 50 of the 3rd embodiment shown in Figure 5, different with the vent window 30 of described first embodiment is, the ventilating path in first air channel 51 is not the path of bending, but straight line path.Equally, this first straight air channel 51 is arranged on the cover 22 of brushgear housing unit 20.Extraneous air streamlined flow from the air inlet 51a in this first straight air channel 51 flows into flows out from air outlet 51b then.The extraneous air that flows out from air outlet 51b bends two-layer in the 3rd air channel 33 and second air channel 32 respectively, enters then in the motor case 10a.
Like this, by the vent window 50 that adopts the 3rd embodiment, ventilating path bends in the 3rd, second air channel 33,32, therefore in terms of existing technologies, can improve vent window 50 anti-dust performances.
For the vent window 60 of the 4th embodiment shown in Figure 6, different with the vent window 30 of described first embodiment is, the ventilating path in second air channel 61 is not the bending path, but straight line path.Adopting under the situation of this vent window 60, first extraneous air that flows into from the air inlet in first air channel 31 bends once this first air channel 31, flows out from air outlet 31b then.From extraneous air bending once more the 3rd air channel 33 that air outlet 31b flows out, enter the air inlet 61a in second air channel 61 then.The extraneous air that flows into from air inlet 61a does not bend but streamlined flow second air channel 61, enters in the motor case 10a from air outlet 61b then.
Like this, by the vent window 60 that adopts the 4th embodiment, first, three air channel 31, the 33 two-layer middle bendings of ventilating path in first～the 3rd air channel 31,61,33, therefore, once compare with in the prior art bending with regard to the extraneous air that imports in the motor case, the inlet of dust can be significantly reduced, therefore, the anti-dust performance of this vent window 60 can be further improved.
Like this, by the vent window 40,50,60 that adopts second of above explanation～the 4th embodiment, in the structure of the dual end that the cover 21 by motor case 10a and brushgear housing unit 20 constitutes, ventilating path bends in two air channels in first～the 3rd air channel 31,32,33,41,51,61, therefore, compare with prior art constructions, promptly, with allow straight air channel be the air channel 72 of body shell 71 and cover that 75 air channel 76 misplaces and structure that a bending path is set is compared on the paper direction between two air channels, can reduce the inlet of dust etc. more effectively.
In addition, among the present invention, mesh-shape filter etc. is not set in addition, but has utilized the cover 21 of brushgear housing used in the prior art unit 20, therefore, neither can cause bigger cost to increase, can not cause that again machine length becomes big, also can improve anti-dust performance.
Claims (4)
1. vent window, be used in the motor case of the electric tool that is built-in with motor, importing extraneous air, it is characterized in that, described vent window is arranged on the duplex that is made of described motor case and the cover that covers this motor case, be positioned at described cover and be provided with first air channel, be positioned at described motor case and be provided with second air channel, at least two air passage portions bendings in the 3rd air channel of ventilating path between described first air channel, described second air channel or two air channels.
2. vent window as claimed in claim 1 is characterized in that, ventilating path respectively in described first air channel, the place's bending of three air channels in described second air channel and described the 3rd air channel.
3. vent window as claimed in claim 2 is characterized in that, ventilating path respectively has place bending in position, described three air channels.
4. vent window as claimed in claim 1 is characterized in that, the brushgear housing unit is installed in described motor case rear portion, serves as the described cover that constitutes the described motor case of covering of described duplex with the cover that covers this brushgear housing unit.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2008280005A JP5253966B2 (en) | 2008-10-30 | 2008-10-30 | Power tool ventilation window |
| JP2008-280005 | 2008-10-30 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101722507A CN101722507A (en) | 2010-06-09 |
| CN101722507B true CN101722507B (en) | 2011-06-15 |
Family
ID=41403104
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009101625019A Expired - Fee Related CN101722507B (en) | 2008-10-30 | 2009-07-30 | Air introduction window for electric power tools |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP2181811B1 (en) |
| JP (1) | JP5253966B2 (en) |
| CN (1) | CN101722507B (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102275155A (en) * | 2010-06-12 | 2011-12-14 | 株式会社牧田 | Motor-driven electric tool |
| JP5725354B2 (en) | 2011-08-19 | 2015-05-27 | 日立工機株式会社 | Electric tool |
| JP2013075351A (en) * | 2011-09-30 | 2013-04-25 | Hitachi Koki Co Ltd | Power tool |
| JP2014117792A (en) * | 2012-12-19 | 2014-06-30 | Hitachi Koki Co Ltd | Electric power tool |
| JP6281842B2 (en) * | 2014-02-18 | 2018-02-21 | パナソニックＩｐマネジメント株式会社 | Electric tool |
| JP2018075685A (en) * | 2016-11-10 | 2018-05-17 | 株式会社マキタ | Electric tool |
| EP3812102B1 (en) * | 2017-08-31 | 2023-06-07 | Dubuis et Cie | Power tools for crimping or cutting objects and methods of assembly |
| JP7229807B2 (en) * | 2019-02-21 | 2023-02-28 | 株式会社マキタ | Electric tool |
| WO2020175006A1 (en) * | 2019-02-26 | 2020-09-03 | 工機ホールディングス株式会社 | Electric work machine and method for forming housing thereof |
| CN112485992B (en) * | 2019-09-12 | 2022-12-30 | 柯尼卡美能达办公系统研发（无锡）有限公司 | Image forming apparatus with a toner supply device |
| DE102021206665A1 (en) * | 2021-06-28 | 2022-12-29 | Robert Bosch Gesellschaft mit beschränkter Haftung | hand tool |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6543549B1 (en) * | 1999-05-28 | 2003-04-08 | Hilti Aktiengesellschaft | Electrically driven hand-held tool |
| GB2383007A (en) * | 2001-12-14 | 2003-06-18 | Bosch Gmbh Robert | Improvements to a hand tool machine. |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0179581U (en) * | 1987-11-13 | 1989-05-29 | ||
| JPH07266260A (en) * | 1994-03-25 | 1995-10-17 | Hitachi Koki Co Ltd | Motor housing construction of striking tool |
| JPH1133934A (en) * | 1997-07-25 | 1999-02-09 | Ryobi Ltd | Housing for electric tool |
| US7770772B2 (en) * | 2006-11-13 | 2010-08-10 | Illinois Tool Works Inc. | Jet pump cooling system for combustion-powered fastener-driving tools |
| JP2008280005A (en) | 2007-05-14 | 2008-11-20 | Oishi Sangyo Kk | Pulp molded interior trim material for automobile |
-
2008
- 2008-10-30 JP JP2008280005A patent/JP5253966B2/en not_active Expired - Fee Related
-
2009
- 2009-07-30 CN CN2009101625019A patent/CN101722507B/en not_active Expired - Fee Related
- 2009-10-23 EP EP09013419.8A patent/EP2181811B1/en not_active Not-in-force
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6543549B1 (en) * | 1999-05-28 | 2003-04-08 | Hilti Aktiengesellschaft | Electrically driven hand-held tool |
| GB2383007A (en) * | 2001-12-14 | 2003-06-18 | Bosch Gmbh Robert | Improvements to a hand tool machine. |
Non-Patent Citations (2)
| Title |
|---|
| JP特开平11-33934A 1999.02.09 |
| JP特开平7-266260A 1995.10.17 |
Also Published As
| Publication number | Publication date |
|---|---|
| JP5253966B2 (en) | 2013-07-31 |
| EP2181811B1 (en) | 2014-12-10 |
| JP2010105130A (en) | 2010-05-13 |
| EP2181811A1 (en) | 2010-05-05 |
| CN101722507A (en) | 2010-06-09 |
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Granted publication date: 20110615 Termination date: 20160730 |