EP2461945A1 - Handwerkzeugmaschine mit einem antriebsmotor und einem getriebe - Google Patents
Handwerkzeugmaschine mit einem antriebsmotor und einem getriebeInfo
- Publication number
- EP2461945A1 EP2461945A1 EP10734740A EP10734740A EP2461945A1 EP 2461945 A1 EP2461945 A1 EP 2461945A1 EP 10734740 A EP10734740 A EP 10734740A EP 10734740 A EP10734740 A EP 10734740A EP 2461945 A1 EP2461945 A1 EP 2461945A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- hand tool
- housing
- drive motor
- tool according
- elastomeric
- 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.)
- Granted
Links
- 229920001971 elastomer Polymers 0.000 claims abstract description 44
- 239000000806 elastomer Substances 0.000 claims abstract description 44
- 230000005540 biological transmission Effects 0.000 claims description 30
- 238000003780 insertion Methods 0.000 claims description 9
- 230000037431 insertion Effects 0.000 claims description 9
- 230000033001 locomotion Effects 0.000 claims description 9
- 239000013536 elastomeric material Substances 0.000 claims description 3
- 238000002347 injection Methods 0.000 claims description 2
- 239000007924 injection Substances 0.000 claims description 2
- 229920001169 thermoplastic Polymers 0.000 claims 1
- 239000004416 thermosoftening plastic Substances 0.000 claims 1
- 229920002725 thermoplastic elastomer Polymers 0.000 description 7
- 230000035939 shock Effects 0.000 description 4
- 238000013016 damping Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000004323 axial length Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
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
- B25F5/006—Vibration damping means
-
- 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
- B25F5/02—Construction of casings, bodies or handles
Definitions
- the invention relates to a hand-held power tool with a drive motor and a gear according to the preamble of claim 1.
- PRIOR ART DE 10 2006 020 172 A1 describes a handheld power tool which has an electric drive motor in a housing, the drive movement of which is transmitted to the tool via a gear.
- the electric drive motor is accommodated in a motor housing, which is connected to a transmission housing for receiving the transmission.
- a sealing element which consists of two half-rings of thermoplastic elastomer, which is molded onto the front side of the motor housing adjacent to the joining region.
- the half rings also serve to dampen the transmission and to seal the gear compartment from the engine compartment.
- the invention has for its object to reduce vibrations in a hand tool with simple measures.
- the hand tool according to the invention is a hand-held machine tool with a arranged in a motor housing drive motor, in particular with an electric drive motor, with a transmission is coupled via which the drive movement of the motor is transmitted to the tool to be driven.
- a movement-transmitting structural unit is arranged, via which at least partial decoupling between the drive motor and the transmission is achieved.
- the decoupling takes place in the axial direction, ie in the direction of the motor longitudinal axis, and / or in the radial direction, ie transversely to the motor longitudinal axis.
- a vibration decoupling via the motion-transmitting structural unit is achieved at least in part.
- a tolerance compensation is possible, for example, such that deviations in the coaxial alignment of the axes of the engine and the transmission can be compensated through the unit.
- At least two elastomer elements are injection-molded onto the inside of the motor housing, which form elastomer bearings for mounting the drive motor in the motor housing.
- the engine can be stored in a simple manner in the motor housing, there are in particular beyond the elastomer bearing beyond no further bearing parts required.
- the injection molding of the elastomeric bearings on the inside of the motor housing is easy to perform.
- the assembly is simplified because the motor bearing is not a separate component, but in the
- the elastomeric bearing at least partially decouples the vibrations emanating from the engine from the engine housing.
- a vibration decoupling is achieved in several respects via the design according to the invention.
- an at least partial vibration decoupling between the transmission and the engine takes effect on both sides, so that both vibrations originating from the transmission side or shocks or impacts are transmitted to the engine in a reduced manner as well as in the opposite direction Engine vibrations propagate only in a reduced manner to the gearbox and thus to the tool.
- This decoupling in the drive train is at least in one direction, ie either in the axial direction or in the radial direction, but expediently in both directions.
- the further effective vibration decoupling is achieved by means of the elastomer bearing in a simple manner to be mounted engine mount.
- the swing Decoupling consists between the drive motor and the encompassing motor housing, in which the drive motor is mounted.
- At least one of the elastomeric bearings is formed at least partially annular and extends in the circumferential direction of the motor housing.
- Motor housing is composed of two half-shells, each elastomeric bearing expediently consists of two semicircles, each of which a semicircle per half-shell is arranged.
- the two semicircles per elastomeric bearing close together to form a closed circuit, so that a circumferential damping is achieved via the elastomeric bearing.
- the elastomeric bearings are not circular, but limited in the axial and circumferential direction at the point to be supported, in particular in the case of motor half-shells only in the circumferential direction Angle range smaller than 180 ° extend, so that in the assembled state no closed circle, but only a circular bearing is formed with interruptions.
- the elastomer In order to achieve a secure connection of the elastomer to be injected with the motor housing, it may be appropriate to inject or inject the elastomeric bearings in the housing-side recesses and / or elevations, whereby the resistance to abrasion and inadvertent release of the elastomer is increased by the housing , In the case of a recess in the housing shell of the motor housing is also expedient that the elastomer extends from the inside to the outside through the motor housing and is integrally connected to other elastomeric parts, which are located on the outside of the housing. Such a one-piece design is also possible with additional elastomer sections on the housing inner wall into consideration.
- This design has the manufacturing advantage that only one common injection point is required during injection molding in order to attach the elastomer at the desired locations on the inside and the outside of the motor housing.
- the elastomer bearing may have on the inside of the housing a radially inwardly directed elevation, which has a contact point for supporting and position tion of the drive motor forms. In this way, the support is reduced to a reduced area of the elastomer bearing, which has the advantage that due to the reduced contact surface the forces required for assembly or joining are reduced, since the elastomer material is displaced or displaced only at a smaller area. must be compressed. For example, in the
- a stop on the inside of the housing of the motor housing, against which the elastomer bearing rests directly.
- the stop serves for the axial support of the mounted motor, wherein in the mounted position, the elastomeric bearing between the motor and the stop on the housing and thereby can develop its damping effect.
- at least one of the elastomer bearings is connected to an insertion bevel extending in the axial direction, which likewise consists of elastomeric material and is injection-molded onto the inside of the housing.
- the insertion bevel is thus formed integrally with the elastomeric bearing.
- the insertion slope allows for easier axial insertion of the motor to the final mounting position.
- the elastomer material used is preferably a thermoplastic elastomer which has the vibration-damping properties required for engine mounting.
- the arranged between the drive motor and the transmission assembly is formed according to a preferred embodiment as a fan unit comprising a fan, wherein expediently mounted on the motor shaft of the drive motor, a toothed sleeve which drives the fan.
- the coupling between the toothed sleeve on the motor shaft and impeller takes place here in such a way that at least one axial clearance, but possibly also a radial clearance between the toothed sleeve and fan is given, whereby a vibration decoupling in the axial or radial direction can be achieved.
- this axial decoupling does not restrict the transmission of motion from the motor shaft to the transmission.
- Fig. 1 is a executed as a battery angle grinder electric hand tool machine in a perspective view
- Fig. 2 shows the power tool in section
- FIG. 3 is an exploded view of two housing shells of the motor housing with an intermediate electric drive motor
- FIG. 4 shows the elastomer sections on a housing shell in a detail view including two partially annular elastomer bearings
- FIG. 5 is a view of the inside of a motor half-shell, shown from two different perspectives
- FIG. 7 is a plan view of a fan wheel to be installed between the drive motor and the transmission
- the electric hand tool 1 shown in FIG. 1 is a battery angle grinder with a motor housing 2 for receiving an electric drive motor, a gear housing 3 for receiving a gear, which is operatively connected to the drive motor, and a tool 4 designed as a grinding wheel.
- the tool 4 is partially overlapped by a protective hood 5 connected to the housing.
- the electrical power is supplied via a rear part, to the motor housing 2 subsequent battery pack 6.
- the transmission housing 3 adjacent section is located on the motor housing 2, a switch 7 for switching on and off of the electric drive motor.
- the outside of the motor housing is partially coated with an elastomer, in particular a thermoplastic elastomer
- the motor housing 2 is constructed in two parts and comprises two housing shells 2 a and 2 b to be assembled together. As can be seen in the sectional view of FIG. 2, is in the motor housing
- the electric drive motor 10 is received, which is motion-coupled with the transmission 1 1 in the transmission housing 3.
- the transmission 1 1 drives the Abretesl. Tool shaft 13, on the front side of the tool 4 is releasably secure.
- the tool shaft 13 is orthogonal to the motor shaft 12 of the electric drive motor see 10th
- a fan unit which includes a fan 15 which is rotationally fixed on a shaft 16.
- a toothed sleeve 10 is pushed against rotation, which drives the coaxially arranged fan 15.
- Tooth sleeve 14 and the fan 15 takes place in such a way that between these components an axial clearance, optionally also given a radial clearance.
- the shaft 16, which is aligned coaxially with the motor shaft 12, is over ball bearings
- the shaft 16 On the side facing away from the motor shaft 12, the shaft 16 carries a bevel gear 18, which is in engagement with a ring gear 19, which is fixedly connected to the tool shaft 13.
- the gear 1 1 thus comprises the bevel gear 18 and the ring gear 19th
- the storage of the electric drive motor 10 in the motor housing 2 takes place via elastomer bearings 20 and 21, which are molded onto the inside in the front or rear area of the motor housing 2.
- the elastomeric bearings 20 and 21 are made of a thermoplastic elastomer (TPE), the engine storage takes place exclusively via the front and the rear elastomeric bearings 20 and 21st
- the Elastomer bearings 20, 21 are each circular and extend in the circumferential direction on the inside of the motor housing. 2
- the front and rear elastomeric bearings 20 and 21 respectively consist of part-circular sections per half-shell 2a, 2b.
- the part-circular portions complement each other to a common front and rear circular elastomeric bearings 20, 21st
- each part-circular section describes a semicircle so that an overall annular elastomer bearing is achieved, as well as embodiments in which the sections per half shell extend only over an angular range smaller than 180 °, so that in the assembled state, the elastomeric bearings do not form a continuous ring, but gap between the part-annular elastomeric sections in the form of angular segments.
- mixed designs in which only one of the elastomeric bearings are completely annular and the other elastomeric bearing with two part-circular sections are each made smaller than 180 °.
- a recess 22 is made in the rear Elastomerla- 21, through which a survey on the
- the elastomeric bearing 21 is sprayed around the boss, whereby a better connection between the sprayed elastomer and the inside of the housing is achieved.
- a radial stop is formed in the region of the elastomer bearing, but only comes into play when the device is exposed to strong shocks.
- the radial stop limits the range of motion of the motor in the device. In normal operation, the motor rests only on the elastomer bearing; in the event of a shock, the motor can also briefly contact the housing-side stop. After the impact, the motor rests again on the elastomer bearing only.
- the radially inwardly pointing side of the partially annular rear elastomeric bearing 21 has elevations 23 and 24 which are spaced apart from one another and rise radially inwards relative to the other inner side of the elastomeric bearing. These elevations 23 and 24 form contact points at which the drive motor is in contact in the mounted state. In this way a reduced contact area between the rear elastomeric bearing 21 and the motor is achieved, which reduces the forces required for assembly. Similarly, the front elastomeric bearing 20 can be equipped with such surveys that form contact points.
- the elastomeric bearings may be formed integrally with further elastomer sections. These further elastomer sections can be applied both to the inside of the housing and to the outside of the housing.
- the elastomer extends through a recess in the housing shell, so that an elastomeric connection between the inside and outside of the housing is given.
- Fig. 5 shows two illustrations of the inside of a housing shell from different perspectives.
- the front elastomeric bearing 20 is supported axially to the front of the motor housing on stops 25 which are formed on the housing inner side. With the introduction of the drive motor in the motor housing, the front elastomeric bearing 20 is pressed against the stops 25.
- the stops 25 limit the range of motion of the engine. In the event of strong impacts or blows, the motor may briefly come into direct contact with the housing-side stops 25, whereas in normal operation the motor bears only on the elastomer bearing and has no direct contact with the stops 25.
- integrally formed with the front elastomeric bearing 20 is an insertion bevel 26 which extends in the axial direction and extends axially rearward from the front elastomeric bearing 20
- the insertion bevel is injected into a channel on the inner wall of the motor housing.
- the insertion bevel 26 has a changing radial component over its axial length; on the side facing away from the front elastomeric bearing 20, it has a greater radial distance to the central or motor longitudinal axis than in the region of front engine mount.
- the changing radial component of the insertion bevel 26 is achieved, for example, by a changing wall thickness.
- FIG. 6 shows the drive motor 10 in the mounted position in the motor housing 2.
- the front elastomeric bearing 20 is by the loading by the motor
- a fan 15 is shown in a single representation, which is arranged in the assembled state between the electric drive motor and the transmission and transmits the drive movement of the electric drive motor to the transmission and further to the tool.
- a star-shaped elastomeric element 29 is integrated, which, as shown in the sectional view of FIG. 8, is disposed between a hub 28 and the main body 30 of the fan wheel.
- the connection of the hub 28 with the main body 30 takes place exclusively via the intermediate elastomer element 29, which consists in particular of a thermoplastic elastomer.
- the hub 28 has a shaft receptacle 31 in which in the mounted state
- Toothed sleeve 14 is added.
- a shaft receptacle 32 is also integrated, which serves to receive the bevel gear 16.
- the elastomer element 29 thus lies in the kinematic transmission path between the drive motor and the transmission. At least partial decoupling between the engine and the transmission is achieved via the elastomer element 29, in particular to the extent that deviations of the coaxiality between the drive shaft of the engine and the shaft of the transmission can be compensated via the resilience of the elastomer element.
- the elastomer element 29 is resilient in both the radial direction and in the axial direction. In addition, vibrations are at least damped via the elastomer element 29, so that also in the radial direction and in the axial direction at least partially a vibration decoupling is given.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
- Motor Or Generator Frames (AREA)
- Harvester Elements (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Vibration Prevention Devices (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102009028247A DE102009028247A1 (de) | 2009-08-05 | 2009-08-05 | Handwerkzeugmaschine mit einem Antriebsmotor und einem Getriebe |
PCT/EP2010/060435 WO2011015450A1 (de) | 2009-08-05 | 2010-07-19 | Handwerkzeugmaschine mit einem antriebsmotor und einem getriebe |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2461945A1 true EP2461945A1 (de) | 2012-06-13 |
EP2461945B1 EP2461945B1 (de) | 2017-03-15 |
Family
ID=42752111
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP10734740.3A Active EP2461945B1 (de) | 2009-08-05 | 2010-07-19 | Handwerkzeugmaschine mit einem antriebsmotor und einem getriebe |
Country Status (6)
Country | Link |
---|---|
US (1) | US8760013B2 (de) |
EP (1) | EP2461945B1 (de) |
CN (1) | CN102470525B (de) |
DE (1) | DE102009028247A1 (de) |
RU (1) | RU2555289C2 (de) |
WO (1) | WO2011015450A1 (de) |
Families Citing this family (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN204094755U (zh) | 2011-06-29 | 2015-01-14 | 英格索尔-兰德公司 | 动力工具罩和动力工具 |
DE102012201583A1 (de) * | 2012-02-03 | 2013-08-08 | Robert Bosch Gmbh | Handwerkzeugmaschinenvorrichtung |
US9221156B2 (en) * | 2013-05-15 | 2015-12-29 | Snap-On Incorporated | Motorized hand tool apparatus and assembly method |
DE102014202218A1 (de) | 2014-02-06 | 2015-08-06 | Robert Bosch Gmbh | Handwerkzeugmaschine mit einem elektronisch kommutierten Elektromotor |
JP6429120B2 (ja) | 2015-02-09 | 2018-11-28 | パナソニックIpマネジメント株式会社 | インパクト回転工具 |
EP3278651A1 (de) * | 2016-08-04 | 2018-02-07 | Andreas Stihl AG & Co. KG | Vorrichtung zur befestigung eines werkzeugs auf einer abtriebswelle eines motorisch angetriebenen arbeitsgerätes |
DE102016219909A1 (de) * | 2016-10-13 | 2018-04-19 | Robert Bosch Gmbh | Handwerkzeugmaschine mit einer Exzentereinheit |
DE102016123272A1 (de) * | 2016-12-01 | 2018-06-07 | C. & E. Fein Gmbh | Elektrowerkzeug mit Motorblock |
JP1617576S (de) * | 2018-04-20 | 2019-04-08 | ||
SE543413C2 (en) * | 2019-05-03 | 2021-01-05 | Husqvarna Ab | Hand-held electrically powered device |
DE102019207974A1 (de) * | 2019-05-29 | 2020-12-03 | Robert Bosch Gmbh | Handwerkzeugmaschine |
DE102019207973A1 (de) * | 2019-05-29 | 2020-12-03 | Robert Bosch Gmbh | Handwerkzeugmaschine |
US11623336B2 (en) | 2019-08-22 | 2023-04-11 | Ingersoll-Rand Industrial U.S., Inc. | Impact tool with vibration isolation |
CN112427967B (zh) * | 2019-08-26 | 2022-11-11 | 南京泉峰科技有限公司 | 电动工具 |
US11509193B2 (en) | 2019-12-19 | 2022-11-22 | Black & Decker Inc. | Power tool with compact motor assembly |
US11705778B2 (en) | 2019-12-19 | 2023-07-18 | Black & Decker Inc. | Power tool with compact motor assembly |
US11855521B2 (en) | 2021-02-02 | 2023-12-26 | Black & Decker, Inc. | Brushless DC motor for a body-grip power tool |
CH718506B1 (de) * | 2021-04-02 | 2024-05-31 | Xenaki Georg | Gerät, insbesondere für Massage- und Behandlungszwecke. |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2837254A1 (de) * | 1978-08-25 | 1980-03-06 | Hilti Ag | Handbohrmaschine mit elektrischem antriebsmotor |
SU1217633A1 (ru) * | 1981-01-21 | 1986-03-15 | Предприятие П/Я А-1944 | Ручна машина с турбоприводом |
DE3922552A1 (de) * | 1989-07-08 | 1991-01-17 | Licentia Gmbh | Handgefuehrtes elektrowerkzeug |
US5253382A (en) * | 1992-08-31 | 1993-10-19 | Janos Beny | Power operated toothbrush |
DE19949755A1 (de) * | 1999-10-15 | 2001-04-26 | Bosch Gmbh Robert | Handwerkzeugmaschine |
DE10259518A1 (de) * | 2002-12-19 | 2004-07-01 | Robert Bosch Gmbh | Gehäuseeinheit |
DE202004011614U1 (de) * | 2004-07-23 | 2004-11-11 | Kress-Elektrik Gmbh & Co. Elektromotorenfabrik | Elektrowerkzeug |
DE102006020172A1 (de) * | 2006-05-02 | 2007-11-08 | Robert Bosch Gmbh | Handwerkzeugmaschine |
DE102006031513A1 (de) * | 2006-07-07 | 2008-01-17 | Robert Bosch Gmbh | Handwerkzeugmaschine, insbesondere Handsäge |
-
2009
- 2009-08-05 DE DE102009028247A patent/DE102009028247A1/de not_active Withdrawn
-
2010
- 2010-07-19 WO PCT/EP2010/060435 patent/WO2011015450A1/de active Application Filing
- 2010-07-19 US US13/388,987 patent/US8760013B2/en active Active
- 2010-07-19 CN CN201080034431.XA patent/CN102470525B/zh active Active
- 2010-07-19 RU RU2012108160/02A patent/RU2555289C2/ru not_active IP Right Cessation
- 2010-07-19 EP EP10734740.3A patent/EP2461945B1/de active Active
Non-Patent Citations (1)
Title |
---|
See references of WO2011015450A1 * |
Also Published As
Publication number | Publication date |
---|---|
RU2012108160A (ru) | 2013-09-10 |
US20120187782A1 (en) | 2012-07-26 |
DE102009028247A1 (de) | 2011-02-10 |
US8760013B2 (en) | 2014-06-24 |
WO2011015450A1 (de) | 2011-02-10 |
CN102470525B (zh) | 2015-04-29 |
EP2461945B1 (de) | 2017-03-15 |
RU2555289C2 (ru) | 2015-07-10 |
CN102470525A (zh) | 2012-05-23 |
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