Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B24—GRINDING; POLISHING
  • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
  • B24B41/00—Component parts such as frames, beds, carriages, headstocks
  • B24B41/007—Weight compensation; Temperature compensation; Vibration damping
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B24—GRINDING; POLISHING
  • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
  • B24B23/00—Portable grinding machines, e.g. hand-guided; Accessories therefor
  • B24B23/02—Portable grinding machines, e.g. hand-guided; Accessories therefor with rotating grinding tools; Accessories therefor
  • B24B23/03—Portable grinding machines, e.g. hand-guided; Accessories therefor with rotating grinding tools; Accessories therefor the tool being driven in a combined movement
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B24—GRINDING; POLISHING
  • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
  • B24B23/00—Portable grinding machines, e.g. hand-guided; Accessories therefor
  • B24B23/04—Portable grinding machines, e.g. hand-guided; Accessories therefor with oscillating grinding tools; Accessories therefor
• • 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
• • 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 grinding machine housing with at least egg nem housing shell element and at least one lenelement connected to the GeHousescha further housing shell element, which form a handle at least from sections.
• the housing shell element and the further Ge housing shell element in particular along at least substantially entire contact line and / or surface of the housing shell element and the further housing shell element, at least substantially free of sichtba ren fasteners connected to each other, in particular fixed to each other.
• the housing shell element and the further housing shell element via at least one contact surface of the GeHousescha lenelements and at least one contact surface of the further GeHousescha lenelements along at least one contact line of the grinding machine housing between the housing shell element and the further Gephaseschalenele element connected to each other.
• the housing shell element and the further Housing shell element are preferably formed as housing shells.
• the housing shell element and the further housing element have a three-dimensional shape.
• the Gerissauseschalenele element and the other housing shell element are preferably formed of a plastic.
• the Gerissauseschalenele element and / or the further housing shell element made of a metal from egg nem composite material, in particular fiber composite material, or from another, a person skilled in the appear appropriate material / is formed.
• the further housing shell element is formed from a different material of the housing shell element Ma material.
• internal components of the Schleifmaschi nengephasekoruse comprehensive grinding machine such as a Motorein unit, a gear, an eccentric unit, an electronic control o. The like., Arranged and / or enclosed by the grinding machine housing.
• the contact line is in particular a line along which the housing shell element and the further housing shell element are arranged in an assembled state of the grinding machine housing to each other, in particular rest against each other.
• the contact line is formed as a separating edge, along which the housing shell element and the further housing shell element are connected to each other and / or separable.
• the contact line corresponds in particular at least substantially a course of a housin se edge of the housing shell element or the further GeHouseschalenele management.
• the housing edge of the housing shell element or of the further housing shell element extends at least substantially perpendicularly perpendicular to a wall thickness of the housing shell element or of the further housing shell element.
• substantially perpendicular is intended here to define, in particular, an orientation of a direction relative to a reference direction, the direction and the reference direction, in particular in one plane, including an angle of 90 ° and the angle a maximum deviation of, in particular, smaller than 8 °, advantageously less than 5 ° and particularly advantageously less than 2 °.
• the housing edge of the housing shell element or of the further housing shell element limits the housing shell element or the further housing shell element. in particular in a direction which is aligned at least substantially perpendicular to the housing edge and the wall thickness of the housing shell element or of the further housing shell element.
• substantially perpendicular is intended to define, in particular, an orientation of a direction relative to a reference direction, the direction and the reference direction, in particular in one plane, including an angle of 90 ° and the angle a maximum deviation of, in particular, less than 8 °, advantageously less than 5 ° and particularly advantageously less than 2 °.
• the housing edge of the housing shell element preferably has an at least partially with a course of the housing edge of the other Gescouseschalenele management corresponding course.
• the Gepatiusescha lenelement and the other housing shell element in an assembled to stand the grinding machine housing at least partially along the housing edge of the housing shell member and the housing edge of the other Ge housing shell element at least substantially dimensionally accurate, in particular jigsaw-like, to each other.
• the housing shell element and the further housing shell element are at least partially over the contact surface of the housing shell element and the contact surface of the other hous seschalenelements to each other.
• the housing shell element and the further Gepurscha lenelement in particular in a mounted state of Schleifmaschinenge housing, let on a tool side of the grinding machine housing towards facing the end of the grinder housing from a handle.
• the hand grip is in particular a housing portion on which a user grips the grinding machine for use and / or actuation of the grinding machine.
• the handle is aligned at an angle to a subsequent to the handle housing portion of the grinding machine housing.
• the handle and the housing section adjoining the handle at least essentially form an L-shaped grinding machine housing.
• the handle is in particular special arcuate in the adjoining the handle housing portion of the grinder housing over.
• the housing shell element and the further housing shell element are preferably connected to one another, in particular fixed to one another.
• the housing shell element and the further Ge Schouseschalenele element are at least on one side facing away from the tool side Schleifma machine housing at least substantially free of visible fastening elements connected to each other, in particular fixed to each other.
• Vorzugswei se the housing shell element and the other housing shell element along the contact line completely free of visible fasteners are connected to each other, in particular fixed to each other.
• The, in particular not visible from the outside, fasteners are formed by fixing the grinding machine housing, which are provided for fixing the GeHousescha lenelements and the other housing shell member.
• the grinding machine housing has a plurality of, in particular different, Fi xierettin to a compound of the housing shell member and the wide ren housing shell member together.
• the grinding machine housing preferably comprises at least one marking element which is provided for marking the grinding machine housing or the grinding machine, in particular as belonging to a specific series of machine tools.
• the marking element is in particular special designed as a static marking element.
• the label element is pre-see a change-free label.
• the identification element is formed at least essenli chen energy consumption.
• the marking element preferably has at least one surface structuring.
• the surface structuring is preferably formed as a silver coating.
• the surface structuring is formed as an embossing, in particular in the form of a logo or the like.
• Vorzugswei se is the label element at least substantially like a clasp, tongue-like, clip-like o. The like.
• the marking element is preferably curved at least in sections.
• the identification element is preferably made of a material element of the material of the housing element and / or of the other housing shell element different material, for example a metal, in particular a spring steel, etcbil det.
• the grinding machine housing comprises at least one, in particular polygonal or horseshoe-shaped, clamping element which is provided at least on the handle to a clamping connection of the housing shell element with the white direct housing shell element.
• the grinding machine housing preferably has at least two clamping elements for a clamping connection of the housing shell element to the further housing shell element.
• the clamping elements are preferably on two facing sides within the housing shell member and the other housing shell member anorden bar.
• the clamping element is different from the GeHousescha lenelement and formed the further housing shell element. Insbesonde re, the clamping element may be formed at least resiliently.
• the clamping element is in particular designed like a clip.
• the clamping element is provided to sammenzuhalten the housing shell element and the further housing shell element by a clamping action of the clamping element.
• the clamping element can in particular at least one, be preferably two, have clamping extensions.
• the housing shell element and the further housing shell element preferably each have at least one fastening rib.
• the fastening ribs are preferably arranged on the inner sides of the housing shell element and the further Geouseschalenele management.
• the clamping element on the Befest Trentsrip pen is pushed or clip-formed.
• the fastening ribs pushed or clipped onto the fastening ribs exert a clamping action at least substantially perpendicular to the contact surfaces on the fastening ribs, by which the housing shell element and the further housing shell element are fixed to one another.
• the clamping element in a Akkumulatorein thrust opening of the handle facing the end of the handle on the hous seschalenelement and / or the further housing shell element can be arranged.
• the clamping element has at least one locking recess for locking at least one battery unit, in particular a battery pack, the grinding machine on the handle.
• the battery unit is preferential, to a power supply to a motor unit, in particular a Elekt romotorü, a drive train unit of the grinding machine provided.
• the handle is preferably provided for at least partially receiving the Akkuein unit within the housing shell member and the other housing shell elements.
• the battery unit by means of Verriege ment recess is at least partially fixed within the housing shell member and the other housing shell member.
• the battery unit is designed as a capacitor, as a connector to a Kopp ment with a power grid or as another, one skilled in the art seem appropriate sense power supply unit.
• the battery unit has at least one locking hook element for locking with the clamping element, in particular with the locking recess of the clamping element.
• the clamping recess preferably has a shape corresponding to the locking hook element.
• the Verriege ment recess may in particular polygonal, round, elliptical o. The like. Be be manufactured det.
• the locking hook element is detachably formed in the Verrie gelungsausEnglishung latched.
• each clamping element has a locking recess.
• Due to the configuration of the invention can advantageously be provided nengekoruse a Schleifmaschi that allows use free of visible or disturbing fasteners. It can be provided an advantageously comfortable and safe grinding machine housing, which is advantageously ergonomically designed in particular on a handle. It can be advantageously provided a visually appealing grinding machine housing, which allows an advantageously simple assembly and / or disassembly. An advantageously cost-effective grinding machine housing can be provided, which allows an advantageously easy-to-maintain grinding machine.
• the handle at least on a tool side of the grinding machine housing facing and / or ist facing side of the handle is formed at least substantially without separating edges.
• the grinding machine housing is formed in an alternative embodiment independently of the non-visible fasteners.
• the grinder housing in the al ternative embodiment in particular in the independently formed from the not sichtba ren fasteners design, at least one housin seschalenelement and at least one verbun with the housing shell element denes further housing shell element, at least partially form a handle, wherein the handle at least one of a horrsei te facing and / or averted side of the handle is formed at least in We sentlichen separating edge free.
• a "main extension plane" of a unit is to be understood as meaning, in particular, a plane which is parallel to a largest side surface of a smallest imaginary cuboid which just completely surrounds the unit, and in particular runs through the center of the cuboid.
• Transverse is to be understood as meaning in particular an alignment of a direction and / or an axis relative to a reference direction and / or a reference axis, wherein the orientation of the direction and / or the axis is at least different from an at least substantially parallel alignment to the reference direction and / or to the reference axis and in particular is skewed or perpendicular to the reference direction and / or to the reference axis.
• substantially parallel is intended in particular an orientation of a direction relative to a reference rich direction, in particular in a plane understood, the direction ge compared to the reference direction a deviation, in particular less than 8 °, before geous less than 5 ° and particularly advantageous smaller than 2 °.
• the handle is at least on the side facing away from the tool side of the handle formed at least substantially free of separating edges. Before given to the handle on the tool side facing and the tool side facing away from the work side of the handle is at least substantially separated edges formed.
• the handle has at least one separating edge on at least one at least substantially perpendicular to the aligned to the tool side of the handle.
• the handle preferably has two sides of the handle which are directed at least substantially perpendicular to the tool side.
• the handle has a separating edge on both sides, which are aligned at least substantially perpendicular to the tool side.
• the handle on one side of the handle, on which a force is applied during use be formed separating edge free. It can be provided an advantageous ergonomic grip option for an advantageous power transmission.
• the grinding machine housing at least one at least partially in the region of a separating edge of the housing shell elements and the other housing shell element lenelement by the GeHousescha and the further housing shell element formed Ventilationöff tion, in particular ventilation slot has. It is conceivable that the grinding machine housing in an alternative embodiment, regardless of the not visible fasteners is formed.
• the grinding machine housing comprises at least one housing shell element and at least one further housing shell element connected to the housing shell element, which at least partially form a handle, and at least one at least in sections a separating edge of the housing shell element and the further housing shell element through the housing seschalenelement and the further housing shell element formed Belüf device opening, in particular ventilation slot.
• the Belstructureungsöff tion is provided to an air supply to a umschlos of the grinding machine housing senen drive train unit, in particular to a motor unit of the drive odd unit, the grinding machine.
• the ventilation opening is arranged in the region of a separating edge between the housing shell element and the further housing shell element.
• the Belüf is device opening by an offset of the housing edge of the further housing shell element between the housing shell element and the other Ge housing shell element formed.
• the further Geousescha lenelement at least in sections, one of a 90 ° -Abwinklung to Au HY Scheme the other housing shell element differently angled ventilation opening area to form a ventilation opening.
• a housing edge of the housing shell element for forming the Beltogetherungsöff tion is spaced apart relative to the other housing shell element, wherein a maximum distance is in particular less than 10 mm, preferably less than 5 mm, more preferably less than 2.5 mm and most preferably greater than 0.1 mm.
• the maximum distance is preferably at least substantially perpendicular to the ventilation opening area of the further housing shell element.
• the invention is based on a grinding machine, in particular a battery sander, with at least one inventive Schleifmaschi nengephaseuse and with at least one drive train unit. It is proposed conditions that the grinding machine housing has at least one lenelement on the Gerissausescha and / or arranged on the other housing shell element receiving element, in particular a bearing bridge, to a fastening of the at least substantially complete Antriebstan unit, which is provided lenelement to a connection of the housing shell element with the other Gescousescha.
• the grinding machine housing has a single receiving element on which at least substantially all functional units of the grinding machine, which are useful or necessary in particular to a proper order of the grinding machine, arranged on the receiving element, in particular on the bearing bridge, in particular fixed.
• the grinding machine housing has a more number of receiving elements.
• An arranged on the housing shell element and / or on the further housing shell element receiving element is in particular integrally connected to the housing shell element and / or with the further housing shell element, preferably with the housing shell element or with the further housing shell element, in particular integrally with the housing shell element and / or the further housing shell element, preferably with the housing shell element or with the further housing shell element is formed.
• a on the Gekorusescha lenelement and / or on the other housing shell element can be arranged receiving element is in particular non-positive and / or positive, for example by a screw, a latch o.
• Element connected to the housing shell and / or the other housing shell element and / or connectable is in particular non-positive and / or positive, for example by a screw, a latch o. The like., Element connected to the housing shell and / or the other housing shell element and / or connectable ,
• the receiving element is preferably designed as a bearing bridge or as another res, a person skilled in the useful appearing receiving element.
• a trained as a bearing bracket receiving element is preferably provided for attachment of the drive train unit, wherein at least a majority of the components of the drive train unit are present separately.
• the individual components of the drive train unit are each a single, in particular non-positive and / or positive, with the bearing bridge connecting bar.
• the bearing bridge has a plurality of Befest Trent onlysaus recesses, slots o. The like. On, and / or by means of which the components of the drive train unit can be arranged. In particular, it is conceivable that the construction parts of the drive train unit via the bearing bridge mechanically and / or electrically connected to each other.
• the receiving element is preferably provided for a, in particular non-positive and / or positive, connection of the housing seschalenelements with the further housing shell element.
• the housing shell element and the further housing shell element are fixed on the receiving element to each other.
• the receiving element may in particular cohesively connected to the housing shell element, in particular formed integrally with the housing shell element, and the further housing shell element may positively and / or positively connected to the receiving element and in particular be fixed ment on the Gepatiuseschalenele. It can be an advantageous simple arrangement of the Antriebsstran gaji at least partially within the housing shell member and / or the other housing shell member at a same time at least We sentlichen free of visible fasteners formed connection of the housing shell element and the other housing shell element are achieved with each other.
• the grinding machine has at least one electronic unit, wherein the receiving element has at least one plug receptacle to a positive and / or positive reception of the Elektronikein unit.
• the electronics unit is preferably designed as a printed circuit board to which a control and / or regulating electronics of the grinding machine is arranged in a manner already known to a person skilled in the art.
• the electronics unit is electrically and / or electronically connected to the operating scarf ter, in particular indirectly via a AkkumulatorWalletiki the grinding machine, the at least two contact elements to an electric con timing of a battery pack of the grinding machine.
• the plug-in receptacle is designed as a groove.
• the plug receptacle has another, a professional appear useful Ausgestal device.
• the design according to the invention can advantageously be realized a secure arrangement of the electronics unit within the Schleifmaschinengephaseu ses. It can be realized advantageously a compact grinding machine.
• the grinding machine comprises at least one electronic unit and at least one exhaust air unit, which is provided for fixing the electronic unit to the housing shell element and / or on the receiving element and for air removal.
• the electronics are not arranged between the exhaust unit and the receiving element, where the electronic unit is positively and / or non-positively connected at least at one end to the exhaust unit, and with another end the electronic unit is positively and / or non-positively connected to the receiving element connected.
• the electronics unit is at least one end to the Abluftein unit and with another end of the electronic unit is on the Aufnah meelement, in particular on the plug-in receptacle to.
• the exhaust air unit preferably comprises at least one receiving groove into which the electronic unit, in particular special in a mounted state of the grinding machine, engages.
• the exhaust air unit has at least one extension which engages in a groove or a recess of the electronics unit, or that the exhaust air unit and / or the electronic unit form-and on another, a person skilled in the sense appearing manner / or non-positively connected to each other.
• the grinding machine has at least one Dämp tion element, such as an elastomeric element which can be arranged between the electronic unit and the receiving element and / or the exhaust unit.
• Dämp tion element such as an elastomeric element which can be arranged between the electronic unit and the receiving element and / or the exhaust unit.
• the grinding machine has at least one, in particular interchangeable, battery pack and at least one accumulator contact unit for electrical connection to the battery pack, wherein the exhaust air unit is provided to fix the accumulator contact unit, in particular within the grinder housing.
• the accumulator contact unit is preferably connected positively and / or non-positively to the exhaust air unit.
• the exhaust air unit preferably comprises at least one retaining element, in particular a groove which is positively and / or non-positively connected to the accumulator contact unit.
• the accumulator contact unit is inserted into the retainer formed as a groove.
• the exhaust air unit another embodiment appearing to a person skilled in the art for a positive and / or non-positive connection with the accumulator contact unit, such as an embodiment of the exhaust unit with Rastele instruments, in which the Akkumulatortitleiki can be latched, o.
• the embodiment according to the invention can advantageously a simple and safe arrangement of the accumulator contact unit within the GeHouseschalenele management and / or the other housing shell element can be achieved, in particular special arrangement of a direct contact of Akkumulatorkon clock unit with the housing shell element and / or the other housing shell element.
• the grinding machine comprises at least one exhaust unit arranged on a motor unit of the drive train unit, which has at least one air duct, which is provided, the exhaust air through a ventilation opening, in particular ventilation slot, which is formed by the housing shell element and the further housing shell element, out of the grinder housing out. It is conceivable that the grinding machine is formed in an alternative embodiment, independently of the arranged on the housing shell element and / or on the other Gescouseschalenele element receiving element.
• the grinding machine comprises in the alternative embodiment, in particular in the inde pendent of the arranged on the housing shell element and / or on the other housing shell element receiving element formed, at least the grinding machine housing according to the invention, at least one Antriebsstrangerü and at least one arranged on a motor unit of the Antriebstrangakue Exhaust unit having at least one Gutleton tion channel, which is provided to the exhaust air through a ventilation opening, in particular ventilation slot, which is formed by the housing shell member and the further housing shell element, out of the Schleifmaschi nengekoruse out.
• the air duct on a circular ring segment-shaped configuration, in particular a tapered annular segment-shaped configuration.
• the air duct tapers before preferably starting from one of the ventilation opening facing the end of the air duct to a motor unit facing the end of the air duct, in particular towards a at an exhaust port of the engine inlet unit arranged end of the air duct.
• the Lufther ing channel in a at least substantially perpendicular to a Rotati onsachse the motor unit extending plane considered a tapered configuration.
• a width of the air duct is increased.
• the air duct runs along an at least substantially entire course of the air duct Ver at least substantially parallel to an outer surface of a motor housing of the motor unit and / or to a direction of rotation of the engine unit.
• the ventilation opening on a Haupterstre direction of passage which extends at least substantially parallel to the axis of rotation of the motor unit.
• substantially parallel should be understood here in particular an orientation of a direction relative to a reference direction, in particular in a plane, wherein the direction opposite to the reference Rich tion, in particular less than 8 °, advantageously less than 5 ° and particularly advantageously less than 2 °.
• the ventilation opening along the main extension direction of the ventilation opening ma maimal extent, in particular a maximum longitudinal extent.
• the ventilation opening facing the end of the air duct has along an at least substantially parallel to the axis of rotation extending direction a maximum extent, in particular a maximum height, in particular special is less than 70%, preferably less than 60% and especially before given is smaller as 50% of a maximum extent of the ventilation opening ent long the main extension direction of the ventilation opening.
• the air duct surrounds the motor unit to more than 50% of a total circumferential extent of the motor unit, in particular rests to more than 50% of a total circumferential extent of the motor unit on an outer surface of the motor unit.
• the Luft arrangementska nal surrounds the motor unit to more than 60%, preferably more than 70% and completely particularly preferably more than 80% of the total circumferential extent of the Mo gate unit.
• the air duct extends along a order circumferential direction at least starting from a housing in a side wall of the motor housing arranged exhaust port of the motor housing to another arranged in the side wall of the motor housing exhaust port. In particular, opens the air duct, in particular the ventilation opening facing end of the air duct, in the ventilation opening.
• the arranged in the Be tenwand of the motor housing exhaust port of the motor housing and / or the further arranged in the side wall of the motor housing Abluf tö réelle the motor housing extend / preferably extends over an angular range, in particular of more than 20 °, preferably more than 30 ° and especially preferably more than 50 ° along the circumferential direction in the side wall of the motor housing.
• the circumferential direction preferably extends in the at least substantially perpendicular to the axis of rotation of the motor unit extending plane.
• exhaust port of the motor housing and the other in the side wall of the Mo torgephases arranged exhaust port of the motor housing are preferably arranged mirror-symmetrically to one another in the side wall.
• the motor housing has more than two exhaust ports, which are arranged along the circumferential direction uniformly or non-uniformly in the side wall.
• a mirror plane to which arranged in the side wall of the motor housing exhaust port of the motor housing and the further arranged in the side wall of the motor housing exhaust port of Motorge housing are arranged mirror-symmetrically relative to each other, preferably before the axis of rotation of the motor unit and extends transversely to a center plane of the grinding machine in which at least the grinding machine housing is formed symmetrically.
• the mirror plane includes the center plane one, in particular minimum, an angle which is in particular less than 60 °, preferably less than 40 ° and particularly Favor is less than 35 °.
• the drive train unit has at least one output shaft unit which is arranged on the receiving element, in particular special pressed into the receiving element, is.
• the receiving element on a side facing the tool holder on the receiving element comprises a bearing dome, in which the output shaft unit is arranged, in particular in which the output shaft unit is pressed.
• at least one bearing element, in particular a ball bearing the Abtriebswel lenhim is pressed into the bearing dome.
• the bearing element to a rotatable position tion of an eccentric shaft of the output shaft unit on the receiving element, in particular in the bearing dome provided.
• the two La gerium to a rotatable mounting of the eccentric shaft to the receiving element, in particular in the bearing dome, provided.
• the output shaft unit comprises at least one balancing element, which is arranged on the eccentric shaft, in particular rotationally fixed to the eccentric shaft is fixed.
• the unbalance compensation element is preferably, as viewed along the ro tationsachse the motor unit and / or a rotational axis of the eccentric shaft, between the two bearing elements to a rotatable mounting of the eccentric shaft to the receiving element, in particular in the bearing dome, arranged.
• the output shaft unit comprises at least one connecting bearing element, in particular a further ball bearing, which is provided for connection to the tool holder.
• the connecting bearing element is preferably rotatably connected to the eccentric shaft.
• the kauslagerele element is arranged on one of the motor unit end remote from the eccentric shaft is.
• the eccentric shaft is rotatably connected to one of the motor unit end with the motor unit, in particular with a rotor shaft of Motorein unit connected. It can be an advantageous simple arrangement of the Antriebsstran gaji at least partially within the housing shell member and / or the other housing shell member at a same time at least We sentlichen free of visible fasteners formed connection of the housing shell element and the other housing shell element are achieved with each other.
• the invention proceeds from a method for mounting a grinding machine, in particular a grinding machine according to the invention. It is proposed that, in at least one method step, at least one at least substantially complete drive train unit is fastened by means of at least one receiving element, in particular a bearing bridge, which is arranged on at least one housing shell element and / or on at least one white housing shell element and by means of which the housing shell element is connected to the other housing shell element.
• At least one method step at least one at least substantially complete drive train unit is fastened by means of at least one receiving element, in particular a bearing bridge, which is arranged on at least one housing shell element and / or on at least one white housing shell element and by means of which the housing shell element is connected to the other housing shell element.
• An advantageously simple arrangement of the drive train unit can be achieved at least partially within the housing shell element and / or the further housing element with a connection of the housing shell element and the further housing shell element that is at the same time at least substantially free of visible fastening elements.
• the Ge housing shell element and the further housing shell element in particular along at least one at least substantially entire contact line and / or surface of the housing shell element and the other Genzousescha lenelements at least substantially free of visible Befest Trentselemen th interconnected, in particular fixed to each other.
• the Ge anneuseschalenelement and the other housing shell element are in particular special means of at least the majority of the inner sides of the Gescousescha lenelements and / or the other housing shell element arranged Fi xier instituten, in particular tongue and groove fasteners, snap hook elements and / or clamping elements connected to each other.
• the housing shell element and the further housing shell element can be particularly easily connected to each other. It can be advantageously achieved a simple installation of a grinding machine with a few assembly steps. Furthermore, it is proposed that, in at least one method step, at least one output shaft unit of the drive train unit is arranged on the receiving element, in particular pressed into the receiving element. It may be an advantageous simple arrangement of the drive train unit to at least partially within the housing shell member and / or the further housing shell member at a same time formed at least substantially free of visible fasteners connection of the housing shell member and the other housing shell element together.
• At least one electronic unit of the grinding machine by means of at least one Stecêtnah me of the receiving element force and / or positively received.
• the electronic unit is fixed to the housing shell element and / or on the receiving element.
• At least one oscillating leg element of the grinding machine arranged on the dividendele element, in particular pushed over the receiving element is.
• the oscillating leg element is pushed over the bearing dome.
• the oscillating leg element is non-rotatably arranged on the receiving element, in particular the bearing dome.
• at least one securing element of the drive shaft unit and / or the oscillating leg element is preferably pushed over at least one cover element of the grinding machine housing via the output shaft unit and / or the oscillating leg element and against the receiving element attached.
• the cover member is fixed by means of a screw connection to the receiving element.
• the Abdeckungsele element has at least one Andrückfortsatz, which is provided to the
• the cover element is preferably provided to secure the oscillating leg member axially to the receiving element, in particular special on the bearing dome.
• the oscillating leg element preferably comprises at least three oscillation leg pairs.
• the oscillating leg pairs preferably extend in each case through a recess of the cover element in the direction of the tool holder Rich.
• the tool holder is preferably fixed to the oscillating leg pairs, in particular by means of a screw connection.
• the grinding machine housing according to the invention, the grinding machine according to the invention and / or the method according to the invention should / should not be limited to the application and embodiment described above.
• the inventive grinding machine housing, the grinding machine according to the invention and / or the method according to the invention can have a number deviating from a number of individual elements, components and units as well as method steps as described herein for performing a function described herein.
• values lying within the stated limits are also to be regarded as disclosed and to be used as desired.
• FIG. 1 is a side view of a grinding machine according to the invention with a grinding machine housing according to the invention in egg ner schematic representation
• FIG. 3 is a sectional view of the grinding machine according to the invention in a schematic representation
• FIG. 5 is a perspective view of the grinding machine according to the invention with a dismantled tool holder in a schematic representation
• Fig. 6 is a perspective view of the invention Schleifma machine of Figure 5 with an element mounted on a Gepatiuseschalenele the grinding machine housing according to the invention and on a further housing shell element of erfindungsge MAESSEN grinding machine housing cover element of the grinding machine housing according to the invention in a schematic representation and
• Fig. 7 is a sectional view of the grinding machine according to the invention in a region of a ventilation duct of an exhaust unit of he inventive grinding machine in a schematic representation.
• FIG. 1 shows a hand tool machine designed as a grinding machine 46, in particular an eccentric grinding machine.
• the grinding machine 46 is preferential, designed as a battery sander.
• the grinding machine 46 comprises at least one grinding machine housing 10 and at least one drive train.
• the drive train unit 28 preferably comprises at least one motor unit 38 and at least one output shaft unit 42.
• the motor unit 38 is preferably designed as an electric motor unit.
• the output shaft unit 42 is preferably designed as an eccentric shaft unit.
• the Antriebsstran gvenez 28 is preferably from the grinding machine housing 10 umschlos sen.
• the grinding machine housing 10 includes at least one housing shell element 12 and at least one connected to the housing shell element 12 further housing shell element 14.
• the grinding machine housing 10 comprises at least one cover member 64 which is arranged on a tool holder 52 of the grinding machine 46 facing side of the grinding machine housing 10 on the housing shell member 12 and / or the further housing shell element 14.
• the grinding machine housing 10 preferably comprises at least one marking element 66 which is provided for marking the grinding machine housing 10 and / or the grinding machine 46, in particular as belonging to a specific series of machine tools.
• the identification element 66 is designed in particular as a static marking voltage element.
• the identification element 66 is provided for a change-free identification.
• the marking element 66 is at least substantially in the shape of a clasp, tongue-like, clip-like or the like.
• the identification element 66 is preferably curved at least in sections.
• the identification element 66 is preferably arranged along an at least substantially perpendicular to a direction to a tool receiving surface 56 of the tool holder 52 extending direction between the cover member 64 and the further housing shell member 14.
• the housing shell element 12 and the further housing shell element 14 form, at least in sections, a handle 16 of the grinding machine 46.
• An outer surface of the housing shell element 12 and an outer surface of the further housing shell element 14 preferably form at least one outer surface. scored the handle 16 from.
• An inner surface of the GeHouseschalenele element 12 and an inner surface of the further housing shell member 14 be an accumulator receiving space, in which a battery pack 48, insbesonde re removable, can be introduced.
• the battery pack 48 via a Ak kumulatoreinschubö réelle 54 of the handle 16 in the accumulator receiving chamber can be inserted.
• the Akkumulatoreinschubö réelle 54 is arranged on one of the work tool holder 52 facing away from the end of the grinder housing 10 on the handle 16.
• the battery pack 48 may alternatively be arranged on an outer side of the grinding machine housing 10.
• the handle 16 is in particular a housing portion of the grinding machine housing 10, on which a user grips the grinding machine 46 for use and / or actuation of the grinding machine 46.
• a Actuate transmission switch 68 of the grinding machine 46 for activation or Deakti vation of energization of the motor unit 38 to the handle 16, insbesonde re to the other housing shell member 14, respectively.
• the Gerissausescha lenelement 12 forms at least in sections an underside of the handle 16, which faces the tool holder 52.
• the further housing shell element 14 forms at least in sections an upper side of the handle 16, which faces away from the tool holder 52.
• the handle 16 is formed at least on one side of the handle 16 facing and / or facing away from a tool side 18 at least substantially free of separating edges (compare FIGS. 2 and 5).
• the tool side 18 is formed in particular from one side of the handle 16, which is the Malawiaufnah me 52 facing.
• separating edges 20, 22 of the Gescousescha lenelements 12 and the other housing shell member 14 are arranged.
• the separating edges 20, 22 extend starting from a Akkumulatorein thrust opening 54 of the handle 16 in the direction of the tool holder 52, in particular at least substantially along an entire extension of the housing shell member 12 and the further housing shell member fourteenth
• the housing shell element 12 and the further housing shell element 14 preferably lie along a large part of the separating edges 20, 22, in particular except for an area in which at least one ventilation opening 24, 26 is formed by the housing shell element 12 and the further housing shell element 14, to each other.
• the separating edges 20, 22 have an L-shaped profile, in particular viewed in a plane which extends at least substantially perpendicularly to the tool receiving surface 56 of the tool holder 52, which extends in particular at least substantially parallel to a battery insertion direction of the grinding machine 46.
• the grinding machine housing 10 comprises at least one / two at least from section in the region of the separating edge / n 20, 22 of the housing shell member 12 and the further housing shell member 14 by the housing shell element 12 and the further housing shell member 14 formed Ventilation opening / s 24, 26, in particular ventilation slot / e (see also Figures 2 and 7).
• the ventilation opening / s 24, 26 to an air supply to the enclosed by the grinding machine housing 10 drive train unit 28, in particular to the motor unit 38 of the drive train unit 28, the Schleifma machine 46 is provided.
• the ventilation opening (s) 24, 26 are arranged in the region of the separating edge (s) 20, 22 between the housing shell element 12 and the further housing shell element 14.
• the ventilation opening (s) 24, 26 can be formed by displacing a housing edge of the wider housing shell element 14 between the housing shell element 12 and the further housing shell element 14.
• the further housing shell element 14 preferably comprises, at least in sections, a ventilation opening area which is angled differently from a 90 ° bend to an outer surface of the further housing shell element 14 to form the ventilation opening (s) 24, 25 (see FIG.
• a housing edge of the Ge is reheatschalenelements 12 to form the ventilation opening / s 24, 26 spaced apart relative to the housing edge of the further housing shell member 14 spaced, wherein a maximum distance is in particular smaller than 10 mm, preferably smaller than 5 mm, particularly preferably smaller is greater than 2.5 mm and most preferably greater than 0.1 mm.
• the maximum distance extends at least substantially perpendicular to the Lüftungsöff opening surface of the other housing shell member 14th
• the tool holder 52 is preferably removable det as an abrasive receptacle.
• the tool holder 52 is hen to a recording of a, in particular designed as an abrasive insert tool (not shown here), in particular in a, already known to a person skilled in the art, vorgese hen.
• the tool holder 52 preferably comprises at least one Fixierele element (not shown here), which is provided for a fixation of the insert tool on the tool holder 52, in particular on the tool receiving surface 56 of the tool holder 52.
• the fixing may be formed in example as a Velcro surface of the tool holder 52. However, it is also conceivable that the fixing element has another, a person skilled in appearing appropriate design, such as a Substituted staltung as a clamping element, as a latching element o. The like.
• the tool holder 52 is preferably by means of an interaction of the motor unit 38 and the output shaft unit 42 a, already known to a person skilled in the art eccentrically to a rotation axis 76 of the motor unit 38 driven.
• the output shaft unit 42 comprises at least one connecting bearing element 58, in particular a ball bearing, which is provided for connection to the tool holder 52 (cf., FIGS. 2 and 3).
• the connecting bearing element 58 is preferably non-rotatably connected to an eccentric shaft 60 of the output shaft unit 42.
• the connecting bearing member 58 is disposed on one of the Mo gate unit 38 facing away from the end of the eccentric shaft 60.
• the Ex zenterwelle 60 is rotatably connected to one of the motor unit 38 end facing the motor unit 38, in particular with a rotor shaft 62 of the motor unit 38, respectively.
• the connecting bearing member 58 is connected to a drive of the work tool receptacle 52 in a manner already known to a person skilled in the art form and / or non-positively connected.
• the kausla gerelement 58 in a corresponding to the connecting bearing member 58 formed receptacle (not shown here in detail) of the tool holder 52 is arranged, in particular in an assembled state of the grinding machine 46th
• FIG. 3 shows a sectional view of the grinding machine 46, wherein in particular the further housing shell element 14, the cover member 64, the tool receiving device 52 and the battery pack 48 are not shown.
• the grinding machine housing 10 includes at least one of the housing shell element 12 and / or arranged on the further housing shell element 14 Aufnah meelement 30, in particular a bearing bridge, to a fastening of at least substantially complete Antriebsstrangertechnik 28, the ment to a connec tion of the housing shell member 12 with the further Gescouseschalenele 14 is provided.
• the receiving element 30 is formed integrally with the housing shell element 12.
• the housing shell element 12 is preferably connected via the receiving element 30, in particular in a region of the tool holder 52.
• the receiving element 30 preferably comprises at least one connecting element 70, which is seen to form a positive and / or non-positive connection with the further housing shell element 14 before.
• the connecting element 70 is in particular designed as a receiving dome, in which at least one extension 72 of the further Genzouseschalenele element 14 engages.
• the receiving element 30 comprises a lot of number of connecting elements 70 which are formed as a receiving dome and are provided to each receive an extension 72 of the further housing shell elements 14.
• the grinding machine housing 10 comprises at least one fixing element 74, in particular a screw, by means of which the further housing shell element 14 is fixable to the receiving element 30, in particular screwed (see FIG. 5).
• the grinding machine 46 comprises at least one electronic unit 32, wherein the receiving element 30 has at least one plug-in receptacle 34 for a non-positive and / or positive reception of the electronic unit 32.
• the Elektronikein unit 32 is preferably formed as a printed circuit board to which a control and / or control electronics of the grinding machine 46 is arranged in a manner already known to a person skilled in the art.
• the electronics unit 32 is electrically and / or electronically connected to the operating switch 68, in particular indirectly via an accumulator contact unit 50 of the grinding machine 46, which has at least two contact elements for electrical contacting of the battery pack 48 of the grinding machine 46.
• the plug-in receptacle 34 is formed as a groove.
• the plug-in receptacle 34 is preferably way arranged on a side facing away from the tool holder 52 side of the receiving element 30 on the receiving element 30.
• the grinding machine 46 comprises at least one exhaust air unit 36 which is provided for fixing the electronic unit 32 to the housing shell element 12 and / or to the receiving element 30 and to an air discharge.
• the electronic unit 32 viewed along an at least in wesent union parallel to the axis of rotation 76 extending direction, between the tapping unit 36 and the receiving element 30 is arranged.
• the electric nikatti 32 is at least at one end to the exhaust unit 36 positively and / or non-positively connected and with another end of the electronics unit 32 is positively and / or non-positively connected to the receiving element 30, in particular with the plug receptacle 34.
• the electronics unit 32 is at least one end to the exhaust unit 36 and with another end of the electronics unit 32 is located on the receiving element 30, in particular on the plug-in receptacle 34 at.
• the exhaust air unit 36 preferably comprises at least one receiving groove, in which the electronic unit 32, in particular in a mon-oriented state of the grinding machine 46, engages.
• the exhaust air unit 36 has at least one extension which engages in a groove or a recess of the electronic unit 32, or that the exhaust unit 36 and / or the electronics unit 32 to another, a person skilled in the sense appearing useful way and Way positively and / or non-positively ver are connected.
• the grinding machine 46 has at least one Dämp tion element, such as an elastomeric element, the unit 36 between the electronics unit 32 and the receiving element 30 and / or the Abluftein can be arranged.
• the grinding machine 46 comprises at least the, in particular replaceable, battery pack 48 and at least the accumulator contact unit 50 to a rule electrical connection with the battery pack 48, in particular in a latorageraum in Akkumu arranged state of the battery pack 48, wherein the exhaust air unit 36 is provided to the Accumulator contact unit 50 to fix, in particular within the grinder housing 10.
• the Akkumulatorkon clock unit 50 is preferably positively and / or non-positively connected to the exhaust unit 36.
• the exhaust air unit 36 preferably comprises at least one teelement 78, in particular a groove which is positively and / or non-positively connected to the Akkumulatormastician 50.
• the Akkumulatorkon clock unit 50 is inserted into the formed as a groove holding member 78.
• the exhaust unit 36 has another, appearing in the art configuration for a positive and / or non-positive connec tion with the AkkumulatorWalletiki 50, such as a configuration of the exhaust unit 36 with locking elements, in which the accumulator contact unit 50 latched is, o.
• the grinding machine 46 comprises at least the exhausting unit 36 arranged on the motor unit 38 of the drive train unit 28, which has at least one air duct 40 which is provided to vent the exhaust air through at least one ventilation opening 24, in particular a ventilation slit through the housing element 12 and Further housing shell element 14 is formed to lead out of the grinding machine housing 10 (see Figure 7).
• the air duct 40 has an annular segment-shaped configuration, in particular a tapered annular segment-shaped configuration.
• the air duct 40 preferably tapers from one of the ventilation opening Be 24 facing the end of the air duct 40 toward one of the motor unit 38 facing the end of the air duct 40, in particular towards a at an exhaust port 80, 82, in particular one of the Belüf opening 24 the most distant Exhaust opening 80, the motor unit 38 arranged end of the air duct 40 (see Figure 7).
• the air duct 40 viewed in a at least substantially perpendicular to the axis of rotation 76 of the motor unit 38 extending plane, a rejuvenating end configuration.
• a width of the air duct is increased Air duct 40 too.
• a height of the Lufttex ing channel 40 starting from the arranged at the exhaust port 80 of the motor unit 38 end of the air duct 40 toward the vent opening 24 facing the end of the air duct 40 increases, in particular continu- ously or leaps and bounds.
• the air duct 40 surrounds the motor unit 38 To more than 50% of a total circumferential extent of the motor unit 38.
• the air duct 4 is located to more than 50% of a total catch extension of the motor unit 38 on an outer surface of the motor unit 38 at.
• the air duct 40 extends along a circumferential direction, at least starting from the arranged in a side wall of the motor housing 86 exhaust port 80 of the motor housing 86 to another arranged in the side wall of the motor housing 86 exhaust port 82.
• the special air duct 40 opens, in particular the Ventilation opening 24 facing the end of the air duct 40, in the ventilation opening 24.
• exhaust port 80 of the motor housing 86 and / or further in the side wall of the Motorgeophu ses 86 arranged exhaust port 82 of the motor housing 86 extend / preferably extends over an angular range in particular of more than 20 °, preferably of more than 30 ° and most preferably of more than 50 ° along the circumferential direction in the side wall of the motor housing 86.
• the order circumferential direction is preferably in which at least in essence hen senk right to the axis of rotation 76 of the motor unit 38 extending plane.
• exhaust port 80 of the Motorge housing 86 and the other in the side wall of the motor housing 86 arrange te exhaust port 82 of the motor housing 86 are preferably arranged mirror-symmetrical to each other in the side wall.
• the motor housing 86 has more than two exhaust ports 80, 82, which are arranged along the circumferential direction uniformly or non-uniformly in the side wall.
• a fan wheel 84 of the motor unit 38 which is rotatably mounted in a motor housing 86 of the motor unit 38 in a manner already known to a person skilled in the art, an air flow for cooling the motor unit 38 can be generated.
• a surrounding surrounding the grinding machine 46 is ambient air due to a vacuum generation by means of the fan wheel 84 through the ventilation openings 24, 26 sucked into the grinding machine housing 10.
• About supply air openings 88, 90 of the motor unit 38, which is arranged in the motor housing 86, the sucked into the grinding machine housing 10 ambient air for cooling the motor unit 38 is available.
• the motor unit 38 has on one of the tool holder 52 facing side of the motor housing 86 to air openings 88, through which, in particular via the ventilation opening / s 24, 26, sucked into the grinding machine housing 10 ambient air for cooling the motor unit 38 is available.
• the motor unit 38 has on a side facing away from the tool holder 52 side of the motor housing 86 Zu Kunststofföffnun conditions 90, through which, in particular via the ventilation opening / s 24, 26, sucked into the grinding machine housing 10 ambient air for cooling the motor unit 38 is available.
• the drive train unit 28 has at least one output shaft unit 42 which is arranged on the receiving element 30, in particular in the receiving element 30 is pressed.
• the receiving element 30 comprises on a side facing the tool holder 52 side of the receiving element 30 a bearing dome 92, in which the output shaft unit 42 is arranged, in particular special in which the output shaft unit 42 is pressed.
• at least one bearing element 94, 96, in particular a ball bearing, from the drive shaft unit 42 is pressed into the bearing dome 92.
• at least two bearing elements 94, 96, in particular two ball bearings, the Abtriebswel lenmaschine 42 are pressed into the bearing dome 92.
• the output shaft unit 42 comprises at least one balancing element 98 Ausselausrete Sammlungsele, which is arranged on the eccentric shaft 60, in particular rotatably fixed to the eccentric shaft 60.
• the imbalance compensation element 98 is preferably wise, viewed along the axis of rotation 76 of the motor unit 38 and / or a rotational axis of the eccentric shaft 60, between the two bearing elements 94, 96 to a rotatable mounting of the eccentric shaft 60 on the receiving element 30, in particular in the bearing dome 92, respectively.
• the grinding machine housing 10 comprises at least one, in particular polygonal or horseshoe-shaped, clamping element 100 which is provided at least on the handle 16 to a clamping connection of the housing shell member 12 with the further housing shell member 14.
• the grinding machine housing 10 at least two clamping elements 100 to a clamping connection of the housing shell member 12 with the other housing shell member 14 (in the figures, only one clamping element 100 is shown to illustrate a function).
• the clamping elements 100 are preferably on two facing sides within the GeHouseschalenele element 12 and the other housing shell member 14 can be arranged.
• the clem metti 100 are in particular formed like a clamp.
• the clamping elements 100 are provided to the housing shell member 12 and the other housing shell member 14 by a clamping action of the clamping elements 100 together.
• the housing shell element 12 and the further housing shell element 14 preferably each have at least one fastening rib 102, 104.
• the clamping elements 100 are formed on the fastening ribs 102, 104 pushed or clipable.
• FIG. 5 shows the grinding machine 46, wherein the cover element 64, the marking element 66 and the tool holder 52 are dismounted.
• the grinding machine 46 comprises at least one oscillating leg member 44 which is arranged on the receiving element 30, in particular ge pushed over the bearing 92, is.
• the oscillating leg member 44 is rotatably mounted on the receiving element 30, in particular on the bearing dome 92, respectively.
• the cover member 64 is provided to an axial securing of the oscillating legs lements 44.
• the cover member 64 is fixed to the receiving member 30 by means of a screw connection.
• the cover member 64 at least one Andschreibfortsatz (not shown here), which is intended to the swing leg member 44 in one fixed state of the cover member 64 to the receiving member 30 to press.
• the cover element 64 is preferably provided to axially secure the oscillating leg element 44 to the receiving element 30, in particular to the bearing dome 92.
• the swinging leg element 44 preferably comprises at least three pairs of swinging legs.
• the pairs of oscillating legs preferably extend in each case through a recess of the cover element 64 in the direction of the tool holder 52 (see FIG.
• the tool holder 52 is preferably fixable to the oscillating leg pairs, in particular by means of a screw connection.
• At least the at least substantially complete drive train unit 28 is fastened by means of at least the receiving element 30, in particular the bearing bridge, which is arranged on the housing shell element 12 and / or on the further housing shell element 14 and by means of which the housing shell element 12 wei direct housing shell element 14 is connected.
• at least the output shaft unit 42 of the drive train unit 28 is arranged on the receiving element 30, in particular in the receiving element 30 is pressed.
• the electronic unit 32 is fixed to the housing shell element 12 and / or to the receiving element 30 by means of the exhaust air unit 36, which is provided for air removal.
• the housing shell element 12 and the further housing shell element 14 along at least one at least substantially entire contact line and / or surface of the Genzousescha lenelements 12 and the other housing shell member 14 at least substantially free of visible fasteners connected to each other, in particular fixed to each other.
• at least the oscillating leg element 44 of the grinding machine 46 is arranged on the receiving element 30, in particular via the receiving element 30 maro ben.
• the marking element 66 is arranged on the housing shell element 12 and / or on the further housing shell element 14.
• the oscillating leg element 44 is attached to the receiving element by means of the cover element 64. element 30 secured axially.
• the covering element 64 is connected to the housing shell element 12 and / or to the wide housing shell element 14, in particular at least substantially free of visible fastening elements, in particular screwed to the receiving element 30. Screws are in at least one other

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)

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• 2018
  • 2018-05-04 DE DE102018206872.0A patent/DE102018206872A1/de active Pending
• 2019
  • 2019-04-30 EP EP19721595.7A patent/EP3787834A1/de active Pending
  • 2019-04-30 WO PCT/EP2019/061099 patent/WO2019211297A1/de active Application Filing
  • 2019-04-30 CN CN201980030166.9A patent/CN112074372B/zh active Active

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