EP3795305A1 - Machine-outil portative - Google Patents

Machine-outil portative Download PDF

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Publication number
EP3795305A1
EP3795305A1 EP20196479.8A EP20196479A EP3795305A1 EP 3795305 A1 EP3795305 A1 EP 3795305A1 EP 20196479 A EP20196479 A EP 20196479A EP 3795305 A1 EP3795305 A1 EP 3795305A1
Authority
EP
European Patent Office
Prior art keywords
housing
machine tool
receiving
hand machine
housing element
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP20196479.8A
Other languages
German (de)
English (en)
Inventor
Thomas Scherl
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.)
Metabowerke GmbH and Co
Original Assignee
Metabowerke GmbH and Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Metabowerke GmbH and Co filed Critical Metabowerke GmbH and Co
Publication of EP3795305A1 publication Critical patent/EP3795305A1/fr
Pending legal-status Critical Current

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

Definitions

  • the invention relates to a hand machine tool, in particular a hand grinder, comprising a housing for receiving a drive unit for the hand machine tool, the housing having a first housing element and a second housing element which adjoin one another on a contact plane oriented in the longitudinal direction of the hand machine tool are arranged, an energy storage receiving interface for detachably receiving at least one energy storage, wherein the energy storage receiving interface has a receiving guide element which is arranged transversely to the contact plane.
  • the invention further relates to a method for manufacturing a hand machine tool.
  • the DE 10 2013 217 553 B4 a grinding machine housing device for a hand grinder, with at least one housing element which specifies an input and output axis plane in which a drive axis of a drive unit of the hand grinder extends in a state of the drive unit arranged in the housing element and in which an output axis of an output unit of the hand grinder extends in a in the housing element arranged state of the output unit extends, and with at least one arranged on the housing element energy storage receiving interface for a detachable receiving of at least one energy storage device, wherein the energy storage receiving interface comprises at least one receiving guide element.
  • the receiving guide element have a main guide axis running transversely to the plane of the input and output axes.
  • the known hand machine tools consist in part of several components, which includes both the manufacture and the assembly of the hand machine tools time-consuming and costly.
  • known hand machine tools have the problem that the center of gravity is unfavorable, as a result of which the handling of the hand tool is sometimes made more difficult.
  • the US 2018/0056473 A1 describes a power tool with a housing.
  • a motor is housed in the housing.
  • a roller is driven by the motor.
  • the housing comprises a first housing part, a second housing part and a third housing part.
  • the housing defines a battery receiving portion configured to receive a removable battery pack that powers the motor.
  • the first housing part, the second housing part and the third housing part each form a part of the battery receiving section.
  • the DE 10 2014 014 693 A1 Fig. 12 shows a power tool that may include a battery mounting part having a guide groove structure on which a guide projection structure of a rechargeable battery can be slidably fitted.
  • a reinforcement member may be attached to the guide groove structure of the battery mounting part and may include a connection structure for detachably connecting the reinforcement member to the guide groove structure.
  • a battery-powered, hand-held power tool in particular a hammer drill
  • a tool housing that contains an electric motor, forms a grip area and has a rail and groove arrangement for releasably holding a rechargeable battery unit
  • has a locking device provided in the tool housing with at least one manual against spring force from a locking element that locks the battery unit in its operating position on the tool housing.
  • a frame part is provided which has at least one receptacle open to the rail and groove arrangement. The locking element and the associated spring are inserted into the receptacle from the open side of the receptacle.
  • an actuating element in the form of a two-armed lever is pivotally supported, one arm of which is accessible for waste by hand and the other arm of which is in engagement with the locking element allowing displacement of the locking element.
  • the actuating element supports the locking element against complete displacement out of the receptacle.
  • the US 2013/0255980 A1 Figure 12 shows a controller in a cordless power tool configured to electronically read an identifier (e.g., a battery characterization resistor) in a battery and identify the battery characteristics that are being powered.
  • the controller can also define the appropriate performance or output parameters of the tool for an identified tool type using a defined electronic library or menu of various tool types that is correlated with associated operating profiles.
  • the EP 1 382 421 A2 describes a power tool with a metal housing, in which the motor is positioned in the housing. An output positioned within the housing is coupled to the motor and adapted to drive a tool. An activation element is coupled to the motor. A battery pack is electrically coupled to the activation element. The activation element excites and switches off the motor, which in turn drives the output.
  • a power tool to / from which a battery pack holding a battery cell is attachable / detachable has: a tool main body provided with an attachment part to / from which the battery pack is attached / detached; a guide groove that is provided in the attachment part and that determines a direction of attachment / detachment of the battery pack; a device-side connector that is provided in the mounting part and that is connected to a battery-side connector that is provided in the battery pack; and a sealing member which is provided in the fixing part and which seals a connection part between the battery-side terminal and the device-side terminal.
  • a power tool is provided with a case in which a motor for driving a work element mounted under the bottom of the case to work on a workpiece is mounted.
  • the power tool has first and second handles extending from opposite sides thereof, at least one handle having one or both of an enlarged portion and an improved gripping portion to facilitate control of the tool.
  • the gripping portion can have an improved textured surface, for example an elastomer surface, so that an operator can grasp the tool.
  • the power tool may include a switch that is movable between a first position in which the power tool is in the active state and a second position in which the power tool is in a deactivated state.
  • a lock can be connected to the power tool and between an unlocked position in which the switch is freely movable between its first and second positions and a locking position in which the switch is locked in the second position so that the power tool remains in the active position can be agile state without the assistance of an operator.
  • the object of the invention is to create a hand machine tool which is compact and simple in design.
  • the object of the invention is to provide a hand machine tool which enables efficient assembly and improved handling.
  • the invention comprises a hand machine tool, in particular a hand grinder, comprising a housing for receiving a drive unit for the hand machine tool, the housing having a first housing element and a second housing element which are arranged adjacent to one another on a contact plane oriented in the longitudinal direction of the hand machine tool are.
  • the hand-held machine tool also includes an energy storage receiving interface for detachably receiving at least one energy storage, the energy storage receiving interface having a receiving guide element which is arranged transversely to the contact plane, and wherein the receiving guide element is made as an integral part of the first housing element and / or the second housing element.
  • the energy storage receiving interface has a simplified structure, since the receiving guide element is designed as an integral part of the housing. In other words, it is not necessary to mount the energy storage receiving interface separately and to attach it to the housing as an adapter. Instead, the receiving guide element is integrated directly into the housing. In the production, the receiving guide element is thus directly and in one piece as part of the formed first housing element and the second housing element. As a direct consequence, the number of assembly steps is reduced, which in turn affects the manufacturing costs.
  • Another advantage is the increased compactness of the hand machine tool. Due to the reduced number of components, the center of gravity can be brought closer to the grinding wheel axis. This results in simplified handling of the hand machine tool.
  • the housing is preferably provided to support bearing forces, such as, for example, drive unit bearing forces, electronics unit bearing forces, etc.
  • the housing thus preferably comprises at least one bearing area in which a bearing element can be arranged, in particular a bearing element for mounting a drive unit of the hand-held grinding machine.
  • the energy storage receiving interface is preferably designed as a battery receiving interface.
  • the energy storage receiving interface is preferably provided to receive an energy storage device designed as a storage battery device.
  • the energy store is preferably designed to be slidable into the energy store receiving interface or designed to be slidable onto the energy store receiving interface.
  • the energy store and the energy store receiving interface are thus connected, in particular as a result of a translational movement of the energy store relative to the energy store receiving interface.
  • the energy store is guided in translation to an arrangement at the energy store receiving interface, at least by means of the receiving guide element.
  • the receiving guide element is preferably designed as an insertion guide element or as a slide-on guide element.
  • the orientation of the receiving guide element which is formed transversely to the contact plane, is to be understood as the orientation of that plane in relation to the contact plane on which the translationally guided insertion movement of the energy store into the energy store receiving interface takes place. Any angle between the plane guiding the insertion movement and the contact plane between the first housing element and the second housing element, which is in an interval greater than 0 ° and less than 180 °, can be understood as transverse.
  • the receiving guide element is produced as an integral part of the first housing element and / or the second housing element, is intended excluded that the receiving guide element is attached to the housing or to the first or second housing element in a separate assembly step.
  • the receiving guide element should be understood as a solid, one-piece component of either the first housing element or the second housing element or of both, that is, of the first and the second housing element.
  • a first section of the receiving guide element is produced as an integral component of the first housing element and a second section of the receiving guide element is produced as an integral component of the second housing element.
  • the receiving guide element has at least two guide grooves arranged in parallel. This achieves the technical advantage, for example, that the energy store can very easily be pushed into the energy store receiving interface or pushed onto the energy store receiving interface.
  • the guide grooves are reliable and easy to manufacture.
  • the receiving guide element is designed orthogonally to the contact plane.
  • the orthogonal arrangement of the receiving guide element represents a special case of an angle of approximately 90 ° between the plane of the exception guide element guiding the insertion movement and the contact plane between the first housing element and the second housing element.
  • the hand machine tool is particularly compact.
  • the center of gravity is very close to the drive axis and the grinding wheel axis, which means that handling is optimal.
  • a drive axis of the drive unit lies in the contact plane.
  • the technical advantage is achieved that the structure of the hand machine tool is largely symmetrical.
  • the contact plane at least partially forms a plane of symmetry of the housing. This, for example, makes the technical The advantage achieved is that the center of gravity can be determined more precisely and can therefore be brought closer to the grinding wheel axis.
  • Another advantage lies in the manufacture of the first and second housing elements. As a result of the equalization of the size and the dimensions of the two housing elements, the manufacturing process - particularly in the case of injection molding - is particularly simple.
  • the energy storage receiving interface advantageously has a contact pin carrier carrying contact pins, the contact pin carrier being held exclusively by receiving bearings which are each integrally formed with the first housing element and integrally with the second housing element.
  • receiving bearings which are each integrally formed with the first housing element and integrally with the second housing element.
  • the hand-held machine tool has an on / off switch, the on / off switch being held by receiving bearings which are each formed integrally with the first housing element and integrally with the second housing element.
  • the housing comprises a penetration section which is arranged between a housing section receiving the drive unit and the energy storage receiving interface.
  • the passage section has a reduced cross section compared to the housing section accommodating the drive unit.
  • the reach-through section enables ergonomically improved guidance of the hand machine tool. For example, the palm of your hand on the Handle of the housing are placed.
  • the index finger and the middle finger can be placed in the direction of the front of the housing and can thus operate the on / off switch.
  • the ring finger and the little finger, on the other hand can be placed against the penetration section or arranged in the space below the penetration section, whereby particularly good guidance of the hand-held machine tool is possible with one-handed operation.
  • the housing comprises a suction connector for connecting a vacuum cleaner, the suction connector being formed by the first housing element and the second housing element.
  • the suction nozzle is designed symmetrically to the contact plane of the housing.
  • both the energy storage receiving interface and the suction connection of the drive axis of the handheld power tool can be oriented in the same direction. If, for example, this direction is oriented in the direction of the user of the handheld power tool when the handheld power tool is in operation, several particular advantages come into play. Since the suction nozzle is led away in the direction of the user, the suction nozzle itself and a conventional hose connection to a connected vacuum cleaner no longer present any visual impairment. Thus, the machining efficiency and the machining quality are increased. The same advantage results from arranging the energy storage device in the direction of the user.
  • this embodiment represents a completely optimized and easy-to-use configuration. This is particularly preferred, for example, in combination with the reach-through section.
  • the object is achieved by a method for manufacturing a hand machine tool according to one of the preceding embodiments.
  • the method comprises the steps of providing the first housing element and the second housing element by means of injection molding and assembling the hand machine tool.
  • Injection molding is often also referred to as injection molding or injection molding process.
  • This is a primary molding process that is mainly used in plastics processing.
  • the respective material is liquefied or plasticized into a mold, the injection molding tool, and injected under pressure with an injection molding machine.
  • the material returns to its solid state through cooling or a crosslinking reaction and is removed as a finished part after the tool is opened.
  • the removal of the finished part is also referred to as demolding, whereby the tool is opened and the workpiece is ejected by pins penetrating into the cavity. Demolding regularly limits the geometry of the finished part, which means that compromises have to be made in production.
  • both the first and the second housing element can be manufactured by injection molding because they include the receiving guide element as an integral part of the first housing element and / or the second housing element and because the receiving guide element is transverse to the contact plane arranged in the longitudinal direction of the hand tool between the first housing element and the second housing element.
  • the receiving guide element is designed as an integral part of the housing and can be manufactured by injection molding. It is not necessary to mount the energy storage receiving interface separately and attach it to the housing as an adapter.
  • the receiving guide element is integrated directly into the housing.
  • the assembly of the hand machine tool comprises the steps of arranging the drive unit, the on / off switch and the contact pin carrier in the first housing element, and closing the housing by means of the second housing element.
  • the technical advantage is achieved that all essential components of the hand machine tool which are to be arranged within the housing can initially only be arranged in the first housing element. The final fixation then takes place by closing the housing with the second housing element.
  • the production of the hand machine tool is implemented in a particularly efficient and process-reliable manner.
  • the electronics unit required for operating the handheld power tool can be arranged within the housing between the first housing element and the second housing element.
  • the engine speed can be varied by means of an adjustment device.
  • an electronic setting wheel is suitable which can be arranged in the area of the penetration section.
  • the Figure 1 shows a perspective view of an embodiment of a hand machine tool 100 according to the invention in the form of a hand grinder.
  • the hand grinder 100 comprises a housing 102 for receiving a drive unit 104 (not shown).
  • the housing 102 shows a first housing element 106 and a second housing element 108, which adjoin one another on a contact plane oriented in the longitudinal direction of the hand-held grinding machine 100.
  • An energy storage receiving interface 112 is arranged in a rear region of the hand-held grinding machine 100.
  • the energy storage receiving interface 112 serves to detachably receive an energy storage 114, which is pushed onto the energy storage receiving interface 112 in a horizontal direction.
  • a suction nozzle 126 for connecting a vacuum cleaner is located below the energy storage receiving interface 112.
  • a handle for guiding the hand-held grinding machine 100 by a user is located on a front region of the housing 102.
  • An on / off switch 120 is located adjacent to the handle.
  • the Figure 2 shows a further perspective view of an embodiment of a hand machine tool 100 according to the invention in the form of a hand grinding machine without an energy store 114
  • Figure 2 shows the energy storage receiving interface 112 for detachably receiving the energy storage 114 (not shown).
  • the energy storage receptacle interface 112 comprises a receptacle guide element 116 with two guide grooves 131A, 131B arranged in parallel.
  • the guide grooves 131A, 131B are orthogonal arranged to the contact plane between the first housing element 106 and the second housing element 108.
  • the integral design of the receiving guide element 116 as part of the first housing element 106 and the second housing element 108 can also be seen.
  • the receiving guide element 116 is divided into a first section 116A, which is part of the first housing element 106, and a second section 116B, which is part of the second housing member 108 is.
  • the first section 116A and the second section 116B together form the receiving guide element 116.
  • the energy storage receptacle interface 112 offers a receptacle for a contact pin carrier 115 (not shown) in an interior space of the housing 102.
  • the contact pin carrier 115 is held within the housing 102 by a receiving bearing 118A which is arranged on the first housing element 106 and is an integral part of the same.
  • the suction nozzle 126 for connecting a vacuum cleaner is arranged below the energy storage receiving interface 112.
  • the Figure 3 shows a sectional view of an embodiment of a hand machine tool 100 according to the invention in the form of a hand grinder.
  • the drive unit 104 is received in the second housing element 108 and a drive axis 105 of the drive unit 104 lies exactly in the contact plane.
  • the energy storage receptacle interface 112 is located in the rear area of the hand grinder 100, the second section 116B of the receptacle guide element 116 formed integrally on the second housing element 108 and the receptacle bearing 118B for holding the contact pin carrier 115 (not shown) being visible.
  • a penetration section is located between the housing section receiving the drive unit 104 and the energy storage receiving interface 112.
  • the passage section has a reduced cross section compared to the housing section accommodating the drive unit.
  • the reach-through section enables ergonomically improved guidance of the hand machine tool.
  • the on / off switch 120 is arranged on the front region of the second housing element 108.
  • the on / off switch 120 is held on the second housing element 108 by a receiving bearing 122B which is formed integrally with the second housing element 108.
  • the suction nozzle 126 for connecting a vacuum cleaner is arranged below the energy storage receiving interface 112.
  • the Figure 4 shows a further sectional view of an embodiment of a hand machine tool 100 according to the invention in the form of a hand grinder.
  • the drive unit 104 is received in the first housing element 106 and a drive axis 105 of the drive unit 104 lies exactly in the contact plane.
  • the energy storage receptacle interface 112 is located in the rear area of the hand grinder 100, the first section 116A of the receptacle guide element 116 formed integrally on the first housing element 106 and the receptacle bearing 118A for holding the contact pin carrier 115 (not shown) being visible.
  • the suction nozzle 126 for connecting a vacuum cleaner is shown below the energy storage receiving interface 112.
  • the on / off switch 120 is arranged on the front region of the first housing element 106.
  • the on / off switch 120 is held on the first housing element 106 by a receiving bearing 122A which is formed integrally with the first housing element 106.
  • the Figure 5 shows a further perspective view of an embodiment of a hand machine tool 100 according to the invention without an energy store 114 (not shown).
  • the first housing element 106 and the second housing element 108 together form the housing 102 and the energy storage receiving interface 112 carries the contact pin carrier 115, which comprises several contact pins 113A, 113B, 113C, ....
  • the energy storage receiving interface 112 comprises the receiving guide element 116, which has two parallel guide grooves 131A, 131B and which is arranged orthogonally to the contact plane.
  • the suction nozzle 126 for connecting a vacuum cleaner is shown below the energy storage receiving interface 112.
  • the Figure 6 shows a flow chart for a method according to the invention for manufacturing a hand machine tool 100 according to one of the preceding embodiments.
  • the method comprises the steps of providing 200 the first housing element 106 and the second housing element 108 by means of injection molding, of arranging 310 the drive unit 104, the on / off switch 120 and the contact pin carrier 115 in the first housing element 106, and the closing 400 of the housing 102 by means of the second housing element 108.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
EP20196479.8A 2019-09-18 2020-09-16 Machine-outil portative Pending EP3795305A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102019006574.3A DE102019006574A1 (de) 2019-09-18 2019-09-18 Hand-Werkzeugmaschine und Verfahren zum Herstellen einer Hand-Werkzeugmaschine

Publications (1)

Publication Number Publication Date
EP3795305A1 true EP3795305A1 (fr) 2021-03-24

Family

ID=72643965

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20196479.8A Pending EP3795305A1 (fr) 2019-09-18 2020-09-16 Machine-outil portative

Country Status (2)

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EP (1) EP3795305A1 (fr)
DE (1) DE102019006574A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023180555A1 (fr) * 2022-03-25 2023-09-28 Festool Gmbh Meuleuse portative comprenant un carter de moteur et une interface de stockage d'énergie
WO2023180554A1 (fr) * 2022-03-25 2023-09-28 Festool Gmbh Meuleuse portative comportant un accumulateur d'énergie et un raccord d'évacuation de poussière

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019006574A1 (de) 2019-09-18 2021-03-18 Metabowerke Gmbh Hand-Werkzeugmaschine und Verfahren zum Herstellen einer Hand-Werkzeugmaschine

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DE202018100760U1 (de) * 2017-03-06 2018-02-26 Nanjing Chervon Industry Co., Ltd. Zweihändig bedienbare Schleifmaschine
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DE102019006574A1 (de) 2019-09-18 2021-03-18 Metabowerke Gmbh Hand-Werkzeugmaschine und Verfahren zum Herstellen einer Hand-Werkzeugmaschine

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023180555A1 (fr) * 2022-03-25 2023-09-28 Festool Gmbh Meuleuse portative comprenant un carter de moteur et une interface de stockage d'énergie
WO2023180554A1 (fr) * 2022-03-25 2023-09-28 Festool Gmbh Meuleuse portative comportant un accumulateur d'énergie et un raccord d'évacuation de poussière

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