EP2461945B1 - Machine-outil à main dotée d'un moteur d'entraînement et d'une transmission - Google Patents

Machine-outil à main dotée d'un moteur d'entraînement et d'une transmission Download PDF

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Publication number
EP2461945B1
EP2461945B1 EP10734740.3A EP10734740A EP2461945B1 EP 2461945 B1 EP2461945 B1 EP 2461945B1 EP 10734740 A EP10734740 A EP 10734740A EP 2461945 B1 EP2461945 B1 EP 2461945B1
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EP
European Patent Office
Prior art keywords
elastomeric
hand
power tool
held power
tool according
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
Application number
EP10734740.3A
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German (de)
English (en)
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EP2461945A1 (fr
Inventor
Florian Esenwein
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
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Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP2461945A1 publication Critical patent/EP2461945A1/fr
Application granted granted Critical
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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
    • B25F5/006—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 tool with a drive motor and a transmission according to the preamble of claim 1.
  • a hand tool described which has an electric drive motor in a housing, the drive movement is transmitted via a transmission to the tool.
  • 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 injection-molded adjacent to the joining region on the end face of the motor housing. 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.
  • the invention provides that at least two elastomeric elements are molded onto the inside of the motor housing, which form elastomeric bearings for mounting the drive motor in the motor housing.
  • the motor 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 is integrated into the motor housing.
  • the elastomeric bearing at least partially decouples the vibrations emanating from the engine from the engine housing.
  • a vibration decoupling is achieved in several ways on the inventive design.
  • On the one hand obtained via the intermediate unit at least partially vibration isolation between the gearbox and engine, which is effective on both sides, so that both from the transmission side outgoing vibrations or shocks or shocks are passed only in a reduced manner to the engine as well as in the opposite direction engine vibrations only in a reduced way propagate to the transmission 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 vibration decoupling exists 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.
  • each elastomeric bearing expediently consists of two semicircles, of which in each case one semicircle per half-shell is arranged. In the assembled state, the two semicircles per elastomeric bearing close together in a closed circuit, so that a circumferential damping is achieved via the elastomeric bearing.
  • the elastomeric bearings are not circular, but are formed limited to the point to be stored in the axial and circumferential direction, especially in motor half-shells in the circumferential direction only over an angular range smaller extend as 180 °, so that in the assembled state no closed circle, but only a circular bearing is formed with interruptions.
  • 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.
  • the elastomer extends from the inside to the outside through the motor housing and is integrally connected with 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 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 is a contact point for support and storage of the drive motor forms.
  • a radially inwardly directed elevation which is a contact point for support and storage of the drive motor forms.
  • 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 because the elastomer material is displaced or compressed only at a smaller area got to.
  • four surveys are provided as contact or support points.
  • 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 elastomeric bearings is connected to an insertion bevel extending in the axial direction, which also consists of elastomeric material and is 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 elastomeric 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.
  • electric hand tool 1 is a battery angle grinder with a motor housing 2 for receiving an electric drive motor, a transmission housing 3 for receiving a transmission, which is operatively connected to the drive motor, and designed as a grinding wheel tool 4.
  • the tool 4 is one with the Housing-connected guard 5 partially overlapped.
  • the electrical power supply via a arranged in the 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 provided with a coating of an elastomer, in particular a thermoplastic elastomer (TPE).
  • TPE thermoplastic elastomer
  • an additional handle 8 is arranged on the housing, which projects laterally.
  • the motor housing 2 is constructed in two parts and comprises two housing shells 2 a and 2 b to be assembled together.
  • the electric drive motor 10 is received in the motor housing 2, which is coupled in motion with the transmission 11 in the transmission housing 3.
  • the gear 11 drives the output or 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 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.
  • the engagement between the toothed sleeve 14 and the fan wheel 15 takes place in such a way that between these components an axial clearance, optionally also a radial clearance is given.
  • the shaft 16 which is aligned coaxially with the motor shaft 12, is rotatably mounted in the transmission housing 3 via ball bearings 17.
  • 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 11 thus includes the bevel gear 18 and the ring gear 19th
  • the elastomeric bearings 20 and 21 are made of a thermoplastic elastomer (TPE), the engine mounting takes place exclusively via the front and the rear elastomeric bearings 20 and 21, respectively
  • 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 each consist of part-circular sections per half-shell 2a, 2b. In the assembled state, the part-circular sections complement each other to a common front and rear circular elastomeric bearings 20, 21.
  • each part-circular section describes a semicircle, so that a total of an annular elastomeric 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 introduced into the rear elastomeric bearing 21 through which a protrusion extends on the housing inner side of the motor housing.
  • 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 is only on the elastomeric bearing, in a shock, the motor can briefly abut the housing-side stop. After the impact, the engine rests again only on the elastomer bearing.
  • front elastomeric bearing 20 can be equipped with such surveys that form contact points.
  • the elastomeric bearings may be formed integrally with other elastomer sections. These further elastomer sections may be applied both to the inside of the housing and to the outside of the housing.
  • the front elastomeric bearing 20 with the coating 9 applied to the outside 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 representations of the inside of a housing shell from different perspectives.
  • the front elastomeric bearing 20 is supported axially of the front of the motor housing on stops 25 which are formed on the inside of the housing. 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 case 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 rests only on the elastomer bearing and has no direct contact with the stops 25.
  • an insertion 26 which extends in the axial direction and extends axially from the front elastomeric bearing 20 in the direction of the rear elastomeric bearing 21.
  • the insertion bevel is injected into a channel on the inner wall of the motor housing.
  • the insertion bevel 26 has over its axial length to a changing radial component, it has on the side facing away from the front elastomeric bearing 20 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 the drive motor 10 is shown in mounted position in the motor housing 2.
  • the front elastomeric bearing 20 is axially compressed by the action of the motor 10, the axial bearing forces being received by the stop on the inside of the motor housing.
  • Corresponding stops 27 are also located in the rear part of the motor housing, the stops 27 are used for axial support to the rear.
  • 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 Fig. 8 can be seen between a hub 28 and the main body 30 of the fan wheel is arranged.
  • 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 the toothed sleeve 14 is received in the mounted state.
  • 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)

Claims (15)

  1. Machine-outil à main comprenant un moteur d'entraînement (10), en particulier un moteur d'entraînement électrique (10) et une transmission (11), avec un élément en élastomère (20, 21) surmoulé sur le côté intérieur d'un boîtier (2), caractérisée en ce qu'entre le moteur d'entraînement (10) et la transmission (11) est disposée une unité structurelle transmettant le mouvement (15) par le biais de laquelle le moteur d'entraînement (10) et la transmission (11) sont au moins partiellement désaccouplés dans la direction axiale et/ou dans la direction radiale, et en ce qu'au moins deux éléments en élastomère (20, 21) sont surmoulés au niveau du côté intérieur du boîtier de moteur, lesquels forment des paliers en élastomère (20, 21) pour le support sur palier du moteur d'entraînement (10) dans le boîtier de moteur (2).
  2. Machine-outil à main selon la revendication 1, caractérisée en ce que le moteur d'entraînement (10) est supporté exclusivement par le biais des paliers en élastomère (20, 21) dans le boîtier de moteur (2).
  3. Machine-outil à main selon la revendication 1 ou 2, caractérisée en ce qu'au moins un palier en élastomère (20, 21) est réalisé au moins sous forme de bague partielle et s'étend dans la direction périphérique du boîtier de moteur (2).
  4. Machine-outil à main selon l'une quelconque des revendications 1 à 3, caractérisée en ce que le palier en élastomère (20, 21) présente du côté tourné vers le moteur d'entraînement (10) des rehaussements (23, 24) qui forment des points de contact pour le support sur palier du moteur d'entraînement (10).
  5. Machine-outil à main selon l'une quelconque des revendications 1 à 4, caractérisée en ce que le boîtier de moteur (2) se compose de deux demi-coques (2a, 2b) et en ce que chaque palier en élastomère (20, 21) comprend deux portions en forme de bagues partielles; dont une portion par palier en élastomère (20, 21) est à chaque fois disposée dans chaque demi-coque (2a, 2b).
  6. Machine-outil à main selon l'une quelconque des revendications 1 à 5, caractérisée en ce qu'au moins un palier en élastomère (20, 21) est connecté à des portions en élastomère supplémentaires (9) qui sont surmoulées sur le boîtier de moteur (2).
  7. Machine-outil à main selon la revendication 6, caractérisée en ce que la paroi de boîtier présente des évidements qui sont traversés par le matériau en élastomère, avec lequel est connecté le palier en élastomère (20, 21).
  8. Machine-outil à main selon l'une quelconque des revendications 1 à 7, caractérisée en ce qu'au moins un palier en élastomère (20, 21) est surmoulé dans un évidement ou dans un rehaussement au niveau du côté intérieur du boîtier.
  9. Machine-outil à main selon l'une quelconque des revendications 1 à 8, caractérisée en ce qu'au moins un palier en élastomère (20, 21) s'applique dans la direction axiale contre une butée du côté du boîtier (25, 27).
  10. Machine-outil à main selon l'une quelconque des revendications 1 à 9, caractérisée en ce qu'au moins un palier en élastomère (20, 21) est connecté à un biseau d'insertion (26) s'étendant dans la direction axiale, constitué également d'un matériau en élastomère.
  11. Machine-outil à main selon l'une quelconque des revendications 1 à 10, caractérisée en ce que les paliers en élastomère (20, 21) se composent d'un élastomère thermoplastique.
  12. Machine-outil à main selon l'une quelconque des revendications 1 à 11, caractérisée en ce que l'unité structurelle entre le moteur d'entraînement (10) et la transmission (11) comprend une unité de ventilateur avec une roue de ventilateur (15).
  13. Machine-outil à main selon la revendication 12, caractérisée en ce qu'une douille dentée (14) qui entraîne la roue de ventilateur (15) est placée sur l'arbre de moteur (12) du moteur d'entraînement (10), la douille dentée (14) et la roue de ventilateur (15) étant accouplées de manière mobile avec un jeu axial et/ou radial.
  14. Machine-outil à main selon la revendication 12 ou 13, caractérisée en ce qu'un élément en élastomère (29) est intégré dans la roue de ventilateur (15).
  15. Machine-outil à main selon la revendication 12 ou 13, caractérisée en ce que l'élément en élastomère (29) dans la roue de ventilateur (15) est disposé entre un moyeu (28) et un corps principal (30) de la roue de ventilateur (15).
EP10734740.3A 2009-08-05 2010-07-19 Machine-outil à main dotée d'un moteur d'entraînement et d'une transmission Active EP2461945B1 (fr)

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 (fr) 2009-08-05 2010-07-19 Machine-outil à main dotée d'un moteur d'entraînement et d'une transmission

Publications (2)

Publication Number Publication Date
EP2461945A1 EP2461945A1 (fr) 2012-06-13
EP2461945B1 true EP2461945B1 (fr) 2017-03-15

Family

ID=42752111

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10734740.3A Active EP2461945B1 (fr) 2009-08-05 2010-07-19 Machine-outil à main dotée d'un moteur d'entraînement et d'une transmission

Country Status (6)

Country Link
US (1) US8760013B2 (fr)
EP (1) EP2461945B1 (fr)
CN (1) CN102470525B (fr)
DE (1) DE102009028247A1 (fr)
RU (1) RU2555289C2 (fr)
WO (1) WO2011015450A1 (fr)

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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 (fr) * 2016-08-04 2018-02-07 Andreas Stihl AG & Co. KG Dispositif de fixation d'un outil sur un arbre de travail d'un appareil de travail motorise
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 (fr) * 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.

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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 (fr) 2011-02-10
EP2461945A1 (fr) 2012-06-13
CN102470525B (zh) 2015-04-29
RU2555289C2 (ru) 2015-07-10
CN102470525A (zh) 2012-05-23

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