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
  • B25F5/02—Construction of casings, bodies or handles

Definitions

• the invention relates to an electrical appliance according to the preamble of claim 1.
• the receiving unit is provided for receiving the drive unit.
• the invention relates to an electrical appliance, in particular a power tool, with a drive unit and a receiving unit.
• the electrical appliance has a fastening unit which is provided for fastening the drive unit when receiving in the receiving unit.
• a "reception a unit can be understood which can be used to receive and / or store drive elements and / or gear elements, such as, for example, a receptacle for a motor unit, a drive shaft, a hammer tube and / or others that appear appropriate to one skilled in the art
• Drive elements and / or which is preferably formed by a receiving flange, in particular an intermediate flange, and / or a portion or a portion of a housing of the E lektro réelles.
• a "drive unit” is to be understood here as meaning a unit which has in particular a motor unit with a motor and a motor housing - tattet and / or interpreted understood. Due to the configuration according to the invention, an advantageous arrangement of the drive unit within the electrical appliance or the receiving unit can be achieved.
• the electrical appliance is preferably formed by a power tool, in particular by a hand-guided machine tool.
• the fastening unit comprises a centering unit, which is provided for centering the drive unit when receiving in the receiving unit.
• a centering is to be understood in particular as a process, preferably an insertion process, in which a movement in one direction causes at least one corrective movement, caused by the centering unit, in at least one second direction, so that an overall movement
• a special fit and backlash insertion and / or centering of the drive unit during assembly of the drive unit with the receiving unit advantageously be achieved and in particular a backlash-free transmission of a drive torque from the drive unit to another drive element, such as an intermediate shaft, can be achieved.
• the centering unit has at least one positive locking element arranged on the receiving unit, which is provided for centering the drive unit, whereby a structurally simple centering or insertion of the drive unit in the receiving unit can be achieved.
• a "form-locking element” is to be understood here in particular as an element which has a shape for centering the drive unit when mounted with the receiving unit.
• An additional protective function of at least a portion of the drive unit with an additional stable receiving area for the drive unit can be advantageously achieved if the receiving unit has a sleeve-shaped receiving element for receiving the drive unit, on the radially inwardly directed surface of the Formschussele- element is arranged.
• a preferably stable mounting of the drive unit within the receiving unit can be achieved by the sleeve-shaped receiving element.
• the sleeve-shaped receiving element can be formed by a single component or formed in several parts. It is further proposed that the sleeve-shaped receiving element forms a receiving region, which is formed tapered by means of the positive-locking element along a mounting direction, whereby an advantageous position-oriented alignment of the drive unit can be achieved. This can be achieved particularly advantageously if the positive-locking element has at least one inclined surface along the assembly direction.
• a "mounting direction" should be understood to mean, in particular, a direction in which the drive unit is mounted relative to the housing during assembly
• An "inclined surface” should be understood to mean a surface which, in particular with respect to the mounting direction and / or in an assembled state relative to a motor shaft of the drive unit, has a tilt angle of preferably greater than 0 ° and less than 30 °, advantageously greater than 0 ° and smaller 20 ° and particularly preferably greater than 0 ° and less than 10 °
• a stepped embodiment and / or further formations of the tapered exceptional region which appear expedient to the person skilled in the art are also possible in an alternative embodiment of the invention.
• the centering unit has at least one positive-locking element tapering along a mounting direction, which is arranged on the drive unit, whereby in particular a large bearing surface or centering surface between the drive unit and the receiving unit can be achieved.
• the receiving unit has at least one fastening element of the fastening unit to a fastening of the drive unit, whereby in addition to a centering of the drive unit at the same time an advantageous attachment of
• the fastening element is formed by a latching element and / or bayonet closure element, whereby a preferably tool-less fastening of the drive unit to the receiving unit can be achieved with a particularly low installation effort.
• a "bayonet closure element” is to be understood as meaning, in particular, a fastening element which leads to a connection or a fastening to the further fastening element with a further fastening element by means of a combination of a linear insertion movement and a subsequent rotary movement with respect to the further fastening element
• the drive unit has at least one latching element and / or bayonet closure element corresponding to the fastening element of the receiving unit, so that a simple assembly and in particular a simple dismantling of the drive unit with the receiving unit can be achieved meaningful fasteners in an alternative embodiment of the invention conceivable at any time.
• the drive unit has a motor sleeve and a motor unit mounted in the motor housing with a motor housing, whereby an advantageous modular arrangement, in particular the motor unit, can be achieved within the receiving unit, which provides a particularly advantageous protection of the motor unit from unwanted dust and / or unwanted moisture.
• a "motor sleeve” is to be understood here in particular as a sleeve which is provided for fastening and / or coupling of the motor unit to or with the receiving unit, and which surrounds the motor in addition to a motor housing in a protective manner.
• Fig. 1 is a formed by a rotary hammer electric appliance in a side view
• Fig. 2 shows a portion of the electrical appliance with a
• Fig. 3 shows a portion of the receiving unit with the
• FIG. 4 shows a further partial section of the receiving unit with the drive unit
• FIG. 5 shows a centering unit with a positive locking element of the receiving unit and a positive locking element of the drive unit
• FIG. 6 shows a partial area of the electrical appliance with an alternative receiving unit and a drive unit in a perspective view.
• FIG. 1 shows an electrical appliance 10 that is formed by a hand-held hand-held power tool.
• the hand tool machine formed by a hammer drill comprises a housing 40 and in a front region 42 a tool holder 44 for receiving a tool (not shown).
• the handheld power tool has a drive unit 12.
• the handheld power tool comprises a mounting or fastening of the drive unit 12 within the hand tool The drive torque of the drive unit 12 is transmitted via a gear device 46 of the power tool to the tool.
• Figures 2 to 4 show the receiving unit 14 of the power tool with the mounted on the receiving unit 14 drive unit 12.
• the receiving unit 14 is provided for receiving gear elements and / or drive elements 16 and formed by an intermediate flange of the hand tool.
• the receiving unit 14 On a side 48 remote from the drive unit 12, the receiving unit 14 has a sleeve-shaped receiving element 50, which is provided for receiving a drive element formed by a hammer tube and / or a drive element of the hand-held power tool formed by a striking mechanism arrangement (FIG. 2).
• a further drive element 16 is arranged on the intermediate flange on the side 48 remote from the drive unit 12.
• the further drive element 16 is formed by an intermediate shaft, which transmits a drive torque generated by the drive unit 12 to further, not shown here, transmission elements during operation of the power tool.
• the drive unit 12 comprises a motor sleeve 34 and a motor unit 36 mounted inside the motor sleeve 34 with an electrically driven motor 52, a motor housing 38 and a fan 54 and is coupled to the receiving unit 14 by means of the motor sleeve 34 (FIGS. 2 to 4).
• the motor sleeve 34 has a cylindrical shape and forms a receiving region 56 for the motor unit 36. Within the receiving region 56 of the motor sleeve 34, on a side 58 facing away from the receiving unit 14, the motor unit 36 or the motor unit 36 is located. Torgephases 38 of the fan 54 is arranged.
• the fan 54 is driven during operation of the motor unit 36 via a motor shaft 60 of the electrically driven motor 52 and is provided for cooling or protection of the motor 52 from undesired overheating.
• the motor sleeve 34 has air outlet openings 62 within a cylindrical wall 64, through which air can flow to a cooling of the motor 52. The air is sucked during operation of the motor unit 36 of the fan 54 and flows between the motor sleeve 34 and the motor unit 36 of the fan 54 in the direction of the air outlet openings 62 by not shown cooling channels.
• the handheld power tool has a fastening unit 66 with a centering unit 18 (FIGS. 4 and 5).
• the centering unit 18 is provided for centering the drive unit 12 when mounted with the receiving unit 14.
• the centering unit 18 has a conically shaped positive locking element 20, which is arranged on a radially inwardly directed surface 24 of a sleeve-shaped receiving element 22 of the receiving unit 14, wherein the sleeve-shaped receiving element 22 along an axial direction 68 on the motor unit 36 facing Page 70 of the receiving unit 14 extends.
• the sleeve-shaped receiving element 22 forms a tapered receiving area 72 for receiving the drive unit 12 or the motor sleeve 34 (FIGS. 4 and 5).
• the form-locking element 20 points along an installation direction 26, which extends parallel to the axial direction 68, on the radially inwardly directed surface 24 the sleeve-shaped receiving element 22 has an inclined surface 28.
• the centering unit 18 has a further form-fitting element 30 on the drive unit 12 or on the motor sleeve 34.
• the form-fitting element 30 is formed tapered in the mounting direction 26 and arranged on a part of the receiving unit 14 facing the receiving unit 14.
• the positive-locking element 30 formed by an inclined surface 74 is arranged on a radially outwardly directed surface 76 of the motor sleeve 34.
• the tapered receiving area 72 or the inclined surface 28, together with the molding element 30, allow a simple centering within the receiving unit 14 and also a large bearing surface between the motor sleeve 34 and the receiving unit 14 or the sleeve-shaped receiving element 22.
• the fastening unit 66 comprises a plurality of fastening elements 32 formed by latching elements, which are formed by latching recesses.
• the latching recesses are arranged on the sleeve-shaped receiving element 22 of the receiving unit 14.
• the locking recesses of the fastening unit 66 and the form-locking element 20 of the centering unit 18 are also integrally formed on the sleeve-shaped receiving element 22.
• the drive unit 12 or the motor sleeve 34 has, for attachment to the receiving unit 14 to the fastening elements 32 corresponding hook-shaped locking elements 78 which are arranged on the radially outwardly directed surface 76 of the motor sleeve 34.
• the hook-like latching elements 78 are arranged on the part of the motor sleeve 34 facing the receiving unit 14 and, for the purpose of attachment, engage in the recessed recesses provided for this purpose Receiving unit 14, so that the locking elements form a positive and non-positive connection with a border of the recess.
• the latching recesses of the receiving unit 14 are slightly wider than the latching elements
• an O-ring 84 for a custom-fit and backlash-free attachment of the drive unit 12 with the receiving unit 14th is provided and leads to a bias voltage between the receiving unit 14 and the motor unit 36 together with the motor sleeve 34 in an assembled state.
• the drive unit 12 is mounted in an assembled state only on the centering unit 18 and the fixing unit 66 on the receiving unit 14 and a the receiving unit 14 facing away area 86 of the drive unit 12 is arranged freely suspended within the power tool.
• the motor sleeve 34 has fastening elements 88 which are arranged on a subregion facing the receiving unit 14 to secure the motor unit 36 in the axial direction 68 (FIGS. 2 to 4).
• the fastening elements 88 are each formed by a hook-shaped latching element.
• the locking elements are arranged in the circumferential direction 80 on a radially inwardly directed surface 90 of the motor sleeve 34.
• the latching elements each have a latching bevel 94 which is aligned obliquely relative to the cylindrical wall 64 of the motor sleeve 34 and has a radially inwardly directed extension component and an extension component directed in the mounting direction 26.
• the motor housing 38 To a fixing of the motor unit 36, the motor housing 38 to the locking elements of the motor sleeve 34 corresponding locking elements 92, which are each formed by a latching recess.
• the latching recesses have an inclined surface 96 corresponding to the latching elements of the motor sleeve 34, so that a maximum contact surface between the latching elements of the motor sleeve 34 and the latching elements 92 of the motor housing 38 is achieved.
• Inclined surfaces 96 of the locking elements 92 a stable position in a mounted state of the motor unit 36 within the motor sleeve 34 in a radial direction 100 achieved.
• the locking recesses have in the circumferential direction 80 has a width which is slightly wider than a width of the hook-like locking elements of the motor sleeve 34, but not more than 20% wider than the width of the hook-shaped locking elements, so that in addition to a backup in the axial direction 68 at the same time a backup of the motor unit 36 in the circumferential direction 80 is achieved.
• the latching elements 92 of the motor housing 38 and the latching depressions are formed by a circumferential groove.
• an attachment of the motor unit 36 with the motor sleeve 34 by means of bayonet locking elements and / or other fastening elements is conceivable anytime.
• FIG. 6 shows a further exemplary embodiment of the invention.
• Substantially identical components, features and functions are generally numbered with the same reference numerals. The following description is essentially limited to the differences from the exemplary embodiment in FIGS. 1 to 5, it being possible to refer to the description of the exemplary embodiment in FIGS. 1 to 5 with regard to components, features and functions remaining the same.
• a drive unit 12 of the handheld power tool is arranged with a receiving unit 14 by means of a fastening unit 66.
• the fastening unit 66 has fastening elements 32, which are formed by bayonet closure elements.
• the drive unit 12 comprises a motor unit 36 with an electrically driven motor 52, a motor housing 38 and a fan 54.
• the motor housing 38 has for this purpose bayonet closure elements 98th on that in the for this purpose, corresponding fastening elements 32 of the receiving unit formed by the bayonet closure elements engage.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Motor Or Generator Frames (AREA)
• Portable Power Tools In General (AREA)

Priority Applications (3)

Applications Claiming Priority (2)

Publications (1)

Family

ID=39580161

Family Applications (1)

Country Status (5)

Families Citing this family (2)

Citations (2)

Family Cites Families (6)

• 2007
  • 2007-05-25 DE DE200710024387 patent/DE102007024387A1/de active Pending
• 2008
  • 2008-04-03 EP EP08735756A patent/EP2155442A1/de not_active Withdrawn
  • 2008-04-03 RU RU2009147825/02A patent/RU2467868C2/ru not_active IP Right Cessation
  • 2008-04-03 WO PCT/EP2008/054008 patent/WO2008145439A1/de active Application Filing
  • 2008-04-03 CN CN200880017399.7A patent/CN101678549B/zh active Active

Patent Citations (2)

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