CN102947036A - Hand-held power tool - Google Patents

Hand-held power tool Download PDF

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Publication number
CN102947036A
CN102947036A CN2011800308017A CN201180030801A CN102947036A CN 102947036 A CN102947036 A CN 102947036A CN 2011800308017 A CN2011800308017 A CN 2011800308017A CN 201180030801 A CN201180030801 A CN 201180030801A CN 102947036 A CN102947036 A CN 102947036A
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CN
China
Prior art keywords
held power
hand held
collector
cooling
air
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
Application number
CN2011800308017A
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Chinese (zh)
Inventor
N·布拉泽尔曼
J·盖尔林
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
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Robert Bosch GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of CN102947036A publication Critical patent/CN102947036A/en
Pending legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D51/00—Sawing machines or sawing devices working with straight blades, characterised only by constructional features of particular parts; Carrying or attaching means for tools, covered by this subclass, which are connected to a carrier at both ends
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D59/00—Accessories specially designed for sawing machines or sawing devices
    • B23D59/04—Devices for lubricating or cooling straight or strap saw blades
    • 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

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Motor Or Generator Cooling System (AREA)

Abstract

The invention relates to a hand-held power tool (1) comprising an electric drive motor (3), the rotor shaft (7) of which has a collector (9), wherein the rotor shaft (7) is connected to a transmission device (4) for transmitting the movement of the rotor to a tool (5). Furthermore, a fan wheel (12) for generating a cooling air current (13, 14) is integrated in the drive motor (3) and arranged adjacent to the collector (9). The coupling between the rotor shaft (7) and transmission device (4) is effected on the collector side.

Description

Hand held power machine
Technical field
The present invention relates to a kind of according to claim 1 hand held power machine as described in the preamble, for example the thorn saw.
Background technology
Known electrically driven handheld power tool, thorn saw for example, its CD-ROM drive motor is embodied as has the dc motor that is integrated into the draught fan impeller in the motor shell.The draught fan impeller that seat is put on the armature spindle of CD-ROM drive motor produces cooling-air stream, and this cooling-air stream is in order to cool off CD-ROM drive motor and axially to be guided through motor shell and usually discharging from motor shell again by outlet radially.
To move by means of transmission device, for example speed changer is delivered on the cutter from CD-ROM drive motor, and this transmission device is at the in service same generation heat of hand held power machine, and these heats must utilize cooling-air stream to discharge.Discharges in order to optimize heat, generally need a plurality of draught fan impellers, but therefore current drain also increases, this especially in the hand held power machine of battery operation to having negative effect running time.
Summary of the invention
Task of the present invention is, the heat that will form when operation efficiently and is effectively discharged hand held power machine.
According to the present invention, this task utilizes the feature of claim 1 to solve.Dependent claims has provided suitable improvement project.
Hand held power machine according to the present invention can be used in the machining of workpiece.Described hand held power machine is such as being thorn saw etc.Described hand held power machine has the CD-ROM drive motor of electricity as driver, and its armature spindle connects with the cutter that will drive in the kinematics mode by transmission device.Described transmission device for example is speed changer, wherein, also can use in principle the transmission device of other types, driving-belt for example, and it for example uses in hand planer.
Described armature spindle is the carrier of armature core, and its coil is switched on by commutator.Described commutator comprises current-collector in rotor-side, and brush is close on the cover surface of current-collector to carry out current delivery.
In addition, a draught fan impeller is integrated in the CD-ROM drive motor, and described draught fan impeller is sat to put on described armature spindle and with described current-collector and axially is adjacent to arrange.Produce cooling-air stream by described draught fan impeller, described cooling-air stream is used for cooling off described CD-ROM drive motor.The heat of described CD-ROM drive motor flows from described motor shell by described cooling-air and is further discharging from the housing of described hand held power machine the trend.
In hand held power machine according to the present invention, described CD-ROM drive motor is arranged in the enclosure interior of described hand held power machine in mode in this wise, and namely described transmission device connects with described armature spindle in the side of described current-collector.For this purpose, described armature spindle is axially given prominence to the supporting arrangement that surpasses described current-collector and/or described armature spindle in described collector side, and wherein, the section that exceeds of described armature spindle is used for connecting with described transmission device.For this reason, described armature spindle for example is provided with pinion or outer toothed portion, and it is meshed with parts of described transmission device.
Therefore, different from the example of prior art, described draught fan impeller but also be used for being connected to the side of the described current-collector of vicinity that armature spindle section on the transmission device is positioned at the CD-ROM drive motor of described electricity not only, and the connection part that is connected in the prior art on the described transmission device is arranged on the relative both sides of described CD-ROM drive motor with described draught fan impeller.Aptly, in the example according to hand held power machine of the present invention, the axial status of described draught fan impeller on the side of the free end side that deviates from described current-collector, yet directly adjacent with described current-collector.
In addition, in motor shell, an air outlet is arranged in the zone of described draught fan impeller, and cooling-air stream is discharged from described motor shell by described air outlet.Air outlet in the described motor shell is connected with flow pass, and described flow pass leads to the air outlet in the housing of described hand held power machine.Obtain by this way the movement-oriented in order to discharge from the housing of described motor shell and described hand held power machine targetedly of heated motor air.
Another advantage is and described draught fan impeller and transmission device direct neighbor.Enclosure interior at described hand held power machine can produce air stream by this way, utilizes described air stream not only can cool off described CD-ROM drive motor, can also cool off described speed changer.Described cooling-air stream can on the one hand axially be conducted through described motor shell, wherein, can or enter into described motor shell by two axial distolateral realizations by one.Additionally or alternatively, cooling-air flows in the axial direction along the outside of described motor shell, namely is directed in the zone between the inner walls of motor shell-cover and described hand held power machine.Form in both cases air stream or part air stream, they are additionally also at least in part along described transmission device guiding, and thereby help the cooling of described transmission device.
Cooling-air is realized flowing in the housing of described hand held power machine by at least one air inflow aperture in the housing, and described air inflow aperture is arranged to the first axial distolateral and/or contiguous described CD-ROM drive motor relative second axially distolateral of contiguous described CD-ROM drive motor.In addition or alternatively, described inflow entrance also can be positioned on other positions of described housing.According to the first favourable example, described at least one inflow entrance only is opened in the described housing in the axial distolateral zone that deviates from described transmission device of described CD-ROM drive motor.The cooling-air that sucks axially flow in the described motor shell with first's air stream aptly, and crosses described motor shell until radially export by described air outlet, radially exports in the zone of draught fan impeller to be opened in the motor shell.Distolateral along the outboard shafts of described motor shell to inswept until opposite of the second portion of described cooling-air stream, and axially enter in the opposite direction there described motor shell and arrive at least described draught fan impeller, and equally by the air outlet radial discharge in the described motor shell in described flow pass.By this way, the cooling of the wall of described motor shell is not only carried out in the inboard but also in the outside.Described part air stream along outside guiding also arrives described transmission device, thereby described transmission device is at least in part equally by related part air stream cooling.
According to another favourable example, some inflow entrances are opened in the housing of described hand held power machine in two axial distolateral zones of described motor shell.Correspondingly, fresh air sucks by two inflow entrances from the outside, it is incorporated into described motor shell inside until draught fan impeller by described axially relative each in distolateral is distolateral, and described radially the discharge from there realized by the direction of the air outflow port the described motor shell at flow pass.The fresh air that sucks by the inflow entrance that is close to described transmission device also is used for partly cooling off described transmission device at least in this example.
Also in the axial opposed distolateral zone of two of CD-ROM drive motor, have when needed in the enforcement modification of inflow entrance and produce one along the part air stream of the outside guiding of motor shell.
What may suit is, the air outlet in the motor shell is surrounded by a circular passage, and extend and this circular passage is connected with flow pass around motor shell in a circumferential direction at least in part this circular passage.By the circular passage a plurality of air outlets that distribute in a circumferential direction in the motor shell are connected with flow pass.
According to another favourable example, described flow pass is directed in the direction of the work-yard of described hand held power machine, and described flow pass is connected the air outflow port in the housing of air outlet and described hand held power machine in the described motor shell.Air stream in the described flow pass is used as air blast in this example, it points to described working region and the cutting that will produce blows out described working region.The advantage of this example is that except the work-yard with the short free air blast in path, the heated motor air between the air outflow port in the air outlet in the described motor shell and the housing of described hand held power machine has this short path.
But in principle, described heated air is also discharged by other positions in the described housing, wherein, and in this case, described flow pass is not to lead in the zone of described work-yard, but to lead to the distance of described work-yard in the air outflow port in the described housing.
In a word, by the example according to hand held power machine of the present invention obtain described CD-ROM drive motor the cooling of effective air and, have the work-yard that in the example of the flow pass of described working region orientation, obtains cleaning at least.Based on the efficient of described improvement, in principle, the single draught fan impeller that is integrated in the motor shell of CD-ROM drive motor just is enough to produce needed cooling-air stream.Thus, with respect to the example with a plurality of draught fan impellers, described current drain reduces, thereby provides longer wear life when the hand held power machine of battery operation.In addition, the space requirement in the described housing also is reduced.
Description of drawings
Other advantages and effective example are described by other claims, accompanying drawing and accompanying drawing draws.In the accompanying drawings:
Fig. 1 shows the hand held power machine with motor driver that is embodied as the thorn saw with the form of side view;
Fig. 2 shows the enlarged drawing of the regional II of Fig. 1;
Fig. 3 shows the example modification of hand held power machine.
In the accompanying drawings, identical parts represent with identical Reference numeral.
The specific embodiment
Fig. 1 and 2 shows the first embodiment of electrically driven handheld power tool 1, and it is embodied as the thorn saw.Hand held power machine 1 has the CD-ROM drive motor 3 of an electricity in housing 2, it especially is configured to dc motor.The armature spindle 7 of the CD-ROM drive motor 3 of electricity connects with speed changer 4, and speed changer drives a cutter by a cutter holding device 8, drives in this embodiment a saw blade.
Base plate 6 is positioned at the downside of housing 2, and it is close on the upside of workpiece when processing work.Saw blade 5 passes the dead slot in the base plate 6 and is in operation carries out vertical moving up and down.
As according to the enlarged drawing of Fig. 2 as can be known, CD-ROM drive motor 3 has current-collector 9, and the motor shell 10 of its driven motor covers.The current-collector 9 that is connected with armature spindle 7 is parts of commutator, described commutator is used for to the coil electricity of armature, armature is sat and is put on armature spindle 7, wherein, described commutator also comprises the brush that is fixed on the housing, and described brush is bearing in for delivered current on the cover surface of described current-collector 9.Current-collector 9 is positioned on the side of speed changer 4 in CD-ROM drive motor 3.On this side, be implemented and the outstanding motor shell 10 that surpasses armature spindle 7 axially-extendings, wherein, realize and the connecting of speed changer 4 at a section of the ledge of armature spindle 7.Armature spindle 7 has for example pinion for this reason, and it is meshed with the gear of speed changer 4.
Offer an air outlet 11 in the motor shell 10 of the CD-ROM drive motor 3 of electricity, it is arranged on the axial height that is integrated into the draught fan impeller 12 in the CD-ROM drive motor in the axial direction.Draught fan impeller 12 is connected with armature spindle 7 nothings with relatively rotating, and produces cooling- air stream 13a, and 13b and 14 is to cool off especially electric CD-ROM drive motor 3 and also to cool off at least in part speed changer 4.Offer a plurality of air outlets 11 at circumference in motor shell 10, the cooling-air stream that draught fan impeller 12 produces is radially discharged by air outlet 11 with distributing.
This air outlet 11 or a plurality of air outlet are surrounded by circular passage 15, circular passage 15 is connected with flow pass 16, and flow pass leads in the zone of the work-yard 17 with cutter 5 by the air outflow port 19 in described housing on the side that deviates from CD-ROM drive motor 3.
Air inflow aperture 18, the first cooling-airs stream 13a that offers the first slot shape in the housing 2 of hand held power machine is directed into enclosure interior with cooling CD-ROM drive motor 3 from the outside by air inflow aperture 18.Air inflow aperture 18 is close to the opposed distolateral with speed changer 4 of CD-ROM drive motors 3.In service at described motor, when draught fan impeller 12 rotation, cooling-air is sucked by inflow entrance 18 from the outside, and is transported to the inside of motor shell 10 as cooling-air stream 13a, and cooling-air stream is directed by motor shell in the axial direction until air outlet 11.The second cooling-air stream 13b is directed along the outside of motor shell 10 until distolateral towards speed changer 4 in the axial direction from air inflow aperture 18, and the second cooling-air stream 13b is transported to the inside of motor shell 10 in the axial direction until arrive draught fan impeller 12 on this is distolateral.The first cooling-air stream 13a cooling CD-ROM drive motor 3, the second cooling-airs stream 13b at first cools off CD-ROM drive motor 3, then along with arriving the described distolateral speed changer 4 that also cools off.
Two cooling- air stream 13a, 13b is discharged to the circular passage 15 from motor shell 10 by air outlet 11 according to arrow 14, and continues to be discharged in the flow pass 16.Cooling-air stream is passed in the zone of work-yard 10 as air blast, and the smear metal that will produce during processing work blows out work-yard 17.The air outflow port 19 of flow pass 16 consists of the port that leads in the housing 2 here, and it is towards the work-yard 17.
Hand held power machine 1 shown in Figure 3 is the hand held power machine of corresponding the first embodiment according to Fig. 1 and 2 to the full extent, thereby in this respect with reference to above-mentioned explanation.But different from the first embodiment, have the second additional air inflow aperture 20 according to the hand held power machine of Fig. 3, be arranged in the housing 2 of the hand held power machine in the zone between distolateral of motor shell 10 of speed changer 4 and CD-ROM drive motor 3.Cooling-air stream 13c flow into enclosure interior by the second air inflow aperture 20, and from there by described towards the distolateral inside that flow in the axial direction motor shell 10.In the zone of draught fan impeller 12, by the first air inflow aperture 18 axially input the first cooling-airs stream 13a and combine by the second cooling-airs stream 13c that the second air inflow aperture 20 axially imports.Heated air is derived by the air outlet 11 in the motor shell 10 diametrically according to air stream 14, and is transported to the work-yard 17 of hand held power machine by circular passage 15 and flow pass 16.
In the embodiment according to Fig. 3, the cooling of CD-ROM drive motor 3 realizes by cooling-air stream 13a and the 13b that is input in the motor shell 3.In principle, this is enough for described cooling; When needed but also carry out other cooling by a cooling-air stream of axially carrying along the outside of motor shell 10, this cooling-air stream for example is drawn into described enclosure interior by the first air inflow aperture 18 and combines with the second cooling-air stream 13c.

Claims (9)

1. hand held power machine, especially thorn are sawed, and it has: the CD-ROM drive motor of an electricity (3), and its armature spindle (7) has a current-collector (9); With being used for of being connected with described armature spindle (7) rotor motion is delivered to transmission device (4) on the cutter (5); At least one is integrated in the described CD-ROM drive motor (3), with the adjacent layout of described current-collector (9) for generation of cooling-air stream (13a, 13b, 13c, 14) draught fan impeller (12), it is characterized in that, described armature spindle (7) axially stretches out on described collector side above the supporting arrangement of described current-collector (9) and/or described armature spindle (7) and with described transmission device (4) and connects, and at least one air outlet (11) in the described motor shell (10) leads in the zone of described draught fan impeller (12) at least one flow pass (16), described cooling-air stream (13a, 13b, 13c, 14) or part cooling-air stream discharge from described motor shell (2) by described air outlet, described flow pass (16) leads at least one air outflow port (19) in the housing (2) of described hand held power machine (1).
2. hand held power machine according to claim 1 is characterized in that, at least one flow pass (16) leads to the work-yard (17) of described hand held power machine (1).
3. hand held power machine according to claim 1 and 2 is characterized in that, described cooling-air stream (13a) axially is directed in the described motor shell (10) deviating from the distolateral of current-collector (9).
4. according to claim 1 to one of 3 described hand held power machines, it is characterized in that, described cooling-air stream (13c) axially is being directed in the described motor shell (10) towards the distolateral of current-collector (9).
5. according to claim 1 to one of 4 described hand held power machines, it is characterized in that, described cooling-air stream (13b) axially is directed to along the outside of described motor shell (10).
6. according to claim 1 to one of 5 described hand held power machines, it is characterized in that, in the zone of the side that deviates from current-collector (9), an air inflow aperture (18) is opened in the housing (2) of described hand held power machine (1).
7. according to claim 1 to one of 6 described hand held power machines, it is characterized in that, in the zone of the side of current-collector (9), an air inflow aperture (20) is opened in the housing (2) of described hand held power machine (1).
8. according to claim 1 to one of 7 described hand held power machines, it is characterized in that, the transmission device that is delivered to cutter (5) from armature spindle (7) that is used for moving is implemented as speed changer (4).
9. according to claim 1 to one of 8 described hand held power machines, it is characterized in that, the air outlet (11) in the described motor shell (10) is surrounded by a circular passage (15), and described circular passage is connected with described flow pass (16).
CN2011800308017A 2010-06-23 2011-04-27 Hand-held power tool Pending CN102947036A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102010030376.3 2010-06-23
DE201010030376 DE102010030376A1 (en) 2010-06-23 2010-06-23 Hand tool
PCT/EP2011/056632 WO2011160871A1 (en) 2010-06-23 2011-04-27 Hand-held power tool

Publications (1)

Publication Number Publication Date
CN102947036A true CN102947036A (en) 2013-02-27

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CN2011800308017A Pending CN102947036A (en) 2010-06-23 2011-04-27 Hand-held power tool

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EP (1) EP2585243A1 (en)
CN (1) CN102947036A (en)
DE (1) DE102010030376A1 (en)
RU (1) RU2013102749A (en)
WO (1) WO2011160871A1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105307821A (en) * 2013-09-02 2016-02-03 日立工机株式会社 Electric power tool
CN108262719A (en) * 2016-12-30 2018-07-10 苏州宝时得电动工具有限公司 Power tool and its drifting dust component
CN109865888A (en) * 2017-11-23 2019-06-11 安德烈亚斯·斯蒂尔两合公司 Hand-held power tool
CN110100326A (en) * 2016-12-23 2019-08-06 本田技研工业株式会社 Battery pack
CN112074375A (en) * 2018-05-04 2020-12-11 罗伯特·博世有限公司 Saw shell

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2908984B1 (en) * 2012-10-19 2018-01-24 Husqvarna AB Outdoor power device internal cooling system
CN115138895B (en) * 2022-09-06 2022-11-08 烟台汇金精密机械有限公司 Cutting machine

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CN101351309A (en) * 2005-12-28 2009-01-21 罗伯特·博世有限公司 Portable electric power tool
CN101511519A (en) * 2006-09-04 2009-08-19 罗伯特·博世有限公司 Hand machine-tool

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US2866485A (en) * 1958-03-19 1958-12-30 Anton Nicholas Power tools
US4961016A (en) * 1989-08-09 1990-10-02 General Motors Corporation Dual-face cooling fan for a dynamoelectric machine
EP0794038A2 (en) * 1996-01-08 1997-09-10 Kress-elektrik GmbH + Co. Elektromotorenfabrik Hand tool with cooling arrangement
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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105307821A (en) * 2013-09-02 2016-02-03 日立工机株式会社 Electric power tool
CN105307821B (en) * 2013-09-02 2018-08-31 工机控股株式会社 Electric tool
CN110100326A (en) * 2016-12-23 2019-08-06 本田技研工业株式会社 Battery pack
CN110100326B (en) * 2016-12-23 2022-04-08 本田技研工业株式会社 Battery pack
CN108262719A (en) * 2016-12-30 2018-07-10 苏州宝时得电动工具有限公司 Power tool and its drifting dust component
CN109865888A (en) * 2017-11-23 2019-06-11 安德烈亚斯·斯蒂尔两合公司 Hand-held power tool
CN112074375A (en) * 2018-05-04 2020-12-11 罗伯特·博世有限公司 Saw shell
CN112074375B (en) * 2018-05-04 2024-08-09 罗伯特·博世有限公司 Thorn saw shell

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EP2585243A1 (en) 2013-05-01
WO2011160871A1 (en) 2011-12-29
RU2013102749A (en) 2014-07-27
DE102010030376A1 (en) 2011-12-29

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Application publication date: 20130227