EP3902655B1 - Machine-outil portative - Google Patents

Machine-outil portative Download PDF

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Publication number
EP3902655B1
EP3902655B1 EP19832923.7A EP19832923A EP3902655B1 EP 3902655 B1 EP3902655 B1 EP 3902655B1 EP 19832923 A EP19832923 A EP 19832923A EP 3902655 B1 EP3902655 B1 EP 3902655B1
Authority
EP
European Patent Office
Prior art keywords
housing
handle
hand
power tool
held power
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP19832923.7A
Other languages
German (de)
English (en)
Other versions
EP3902655A1 (fr
Inventor
Jens Zieger
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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
Priority claimed from DE102018251730.4A external-priority patent/DE102018251730A1/de
Priority claimed from DE102018251718.5A external-priority patent/DE102018251718A1/de
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP3902655A1 publication Critical patent/EP3902655A1/fr
Application granted granted Critical
Publication of EP3902655B1 publication Critical patent/EP3902655B1/fr
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Anticipated expiration legal-status Critical

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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
    • 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
    • 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
    • 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
    • B24B7/00—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor
    • B24B7/10—Single-purpose machines or devices
    • B24B7/18—Single-purpose machines or devices for grinding floorings, walls, ceilings or the like
    • B24B7/186—Single-purpose machines or devices for grinding floorings, walls, ceilings or the like with disc-type tools

Definitions

  • the present invention relates to a hand-held power tool, in particular a grinder, for simultaneously driving several grinding plates, preferably for simultaneously driving three grinding plates, in particular tiltable, rotating and/or oscillating and/or randomly circularly drivable grinding plates.
  • Such hand tool tools are, for example, from EP 1 466 698 A1 known, which forms the basis for the preamble of claim 1. Furthermore, the EP 3 330 044 A1 referred.
  • the invention relates to a hand-held power tool with the features of claim 1.
  • Advantageous refinements, variants and further developments of the invention can be found in the subclaims.
  • the invention is based on a hand-held power tool, in particular a grinder, for simultaneously driving several grinding plates, preferably for simultaneously driving three, in particular tilting, rotating and/or oscillating and/or randomly circularly drivable or driven grinding plates.
  • the hand-held power tool has a motor with a drive shaft that specifies a motor axis, a central wheel driven by this motor, in particular a spur gear that specifies a central wheel axle, and several, in particular three, output shafts driven by the central wheel, each of which specifies an output shaft axis, each output shaft being used to drive one Grinding plate or at least one grinding plate holder is provided.
  • the motor axis is arranged eccentrically, in particular parallel and eccentrically, to the central wheel axis. It is arranged between a front output shaft axle and the central wheel axle. It is proposed that the motor axle intersects a connecting line between an output shaft axle, in particular on the front side, and the central wheel axle; i.e. is arranged between the output shaft axle, in particular on the front side, and the central wheel axle. This shifts weight to the front or front sanding plate, which means that the hand-held power tool runs more smoothly when sanding.
  • the central wheel axle and the input and output shaft axles are preferably arranged essentially parallel to one another.
  • the central wheel axle is preferably arranged in the center of a regular polygon, in particular a regular triangle, in the corners of which the three output shaft axes in particular are arranged.
  • the motor or its motor axis, relative to the central wheel axis is arranged opposite a handle or handle housing, in particular a bar handle, which is aligned transversely to the central wheel axis.
  • the motor acts as a counterweight to the handle, in particular to the accumulator arranged in or on the handle.
  • the three grinding plates in particular are loaded as evenly or homogeneously as possible. Fatigue-free work, increased smoothness and/or a better balanced hand tool are provided. This means that user-friendliness can be increased.
  • the handle housing protrudes from the main housing in the form of a bar handle, it can be easily and/or comfortably grasped by one hand.
  • the hand-held power tool can be easily guided, especially into corners or under objects that limit the accessibility of workpieces to be machined.
  • the visibility of the hand-held power tool or the workpiece to be machined is improved because the user's hand is less in the field of vision of the workpiece to be machined.
  • the user-friendliness is increased.
  • the handle or the handle housing is intended to accommodate a battery, in particular a replaceable battery, preferably a replaceable plug-in battery.
  • the main housing can be designed to be compact. Accessibility for charging and/or replacing the battery can be improved.
  • the motor which is arranged eccentrically in relation to the central wheel axis opposite the handle, represents a counterweight to the accumulator.
  • the hand-held power tool is better balanced due to the opposite arrangement of the motor and accumulator.
  • the centers of gravity of the motor and accumulator are not on one side of the center axis or the hand tool.
  • the handle or the handle housing protrude from a main housing, which accommodates at least the motor, the central wheel and the input and output shafts, at an angle between 45°-135° from the main housing, based on the orientation of the central wheel axle.
  • Such an orientation allows the handle to be gripped comfortably.
  • the fingers can wrap around the handle.
  • the guidance of the hand-held power tool is made easier and the visibility, in particular of a front of the hand-held power tool, is improved.
  • a longitudinal axis of the handle, or essentially a center axis of the handle, and the central wheel axis span a plane, with two output shafts being arranged mirror-symmetrically to the plane.
  • two of the grinding plates or grinding plate holders are arranged essentially mirror-symmetrically to the plane.
  • the usability is balanced.
  • the hand tool fits well in the hand.
  • the rear output shaft axes are symmetrical to the center axis of the accumulator or the handle.
  • the center axis of the battery, motor and front output shaft or front sanding plate lie on the plane or the middle plane of the hand tool. This means that the left and right hand tool sides are balanced, which reduces the forces on the user's hand-arm system when working.
  • the front output shaft comes to rest in the plane.
  • the third output shaft comes to rest relative to the central wheel axle opposite the handle. This defines a front side of the device opposite the handle. The weight of the hand tool is as balanced as possible.
  • the motor axis comes to rest in the plane.
  • the motor and/or the motor axle is arranged essentially between the third output shaft and the central wheel axle, in particular in the plane.
  • the plane intersects the accumulator and/or the motor in the middle. If possible, mirror symmetry of the hand-held power tool is made possible between the right and left sides of the plane. As a result, as little as possible moment is generated around the center axis of the handle, which ensures fatigue-free work and comfortable handling of the hand-held power tool.
  • the center of gravity of the hand tool comes to lie relative to the central wheel axle relative to the motor axle or the motor and / or comes to lie between the handle and the central wheel axle. In particular, the center of gravity comes to rest on the plane. This also means that as far as possible no moment is generated around the center axis of the handle, which ensures fatigue-free work and comfortable handling of the hand-held power tool. Furthermore, this or the position of the accumulator makes it possible for the hand-held power tool to stand securely on the edge of the rear sanding plate and the end of the handle. This means that the sanding discs are in the air and can cool down better during work breaks and be freed from dust. Two stable positions for the sander can sometimes be provided - firstly, standing on all three sanding plates; secondly, store it on the edge of the two rear sanding pads and the free end of the handle.
  • the hand tool is provided for three-point mounting on two grinding plates facing the handle and the free end of the handle or the free end of the plug-in accumulator.
  • the invention is based on a hand-held power tool, in particular a grinder, for the simultaneous drive of several, preferably for the simultaneous drive of three, in particular tiltable, rotating and/or oscillating and/or randomly circularly drivable or driven grinding plates, having a main housing which has at least one Motor for driving the sanding disc. It is proposed that a handle housing that forms a handle projects essentially transversely to the main housing, in particular protrudes like a rod handle from the main housing, in particular wherein the handle housing is intended to accommodate an accumulator, in particular a plug-in accumulator.
  • the main housing typically accommodates a motor with a drive shaft that specifies a motor axis, a central wheel driven by this motor, in particular a spur gear that specifies a central wheel axle, and several, in particular three, output shafts driven by the central wheel, each of which specifies an output shaft axis, each output shaft being used to drive one Grinding plate or at least one grinding plate holder is provided.
  • the central wheel axle and the input and output shaft axes are preferably arranged essentially parallel to one another.
  • the central wheel axle is preferably arranged in the center of a regular polygon, in particular a regular triangle, in the corners of which the three output shaft axes in particular are arranged.
  • the handle housing protrudes from the main housing in the form of a bar handle, it can be easily and/or comfortably grasped by one hand.
  • the hand-held power tool can be easily guided, especially into corners or under objects that limit the accessibility of workpieces to be machined.
  • the visibility of the hand-held machine tool or the workpiece to be machined is improved because the user's hand is not in the way.
  • the user-friendliness is increased.
  • the main housing can be designed to be compact. Accessibility for charging and/or replacing the battery can be improved.
  • a status display for the state of the accumulator and/or the hand-held power tool which switches on or is activated when the position of the hand-held power tool changes, in particular a movement of the hand-held power tool at least around the center of gravity of the accumulator or the hand-held power tool. It is also claimed that the status display switches off or is deactivated when the hand-held power tool is activated and/or after a predetermined or predeterminable time interval.
  • Fig. 1 shows the hand-held power tool in the form of a grinder 10 in a front view.
  • the grinder 10 is intended to drive three grinding plates 12, 14, 16 at the same time.
  • Through a cardan-like or cardanic suspension (cf. Fig. 2 ) of the grinding plates 12, 14, 16, these are pivotally or tiltably mounted. They are driven in rotation and are well suited for sanding even curved surfaces.
  • the grinder 10 can be activated via an actuation switch 18.
  • a labeling element 20 advantageously assigns this device to a device series or a manufacturer.
  • Fig. 2 shows the hand-held power tool in the form of the grinder 10 in a sectional view AA through plane A (cf. Fig. 1 ).
  • the front-side grinding plate 12 is arranged in front of a central wheel axle 22. It is arranged relative to a central wheel axle 22 opposite a handle 24.
  • the two rear grinding plates 14, 16, of which only the grinding plate 16 can be seen in this illustration, are arranged on a side of the central wheel axle 22 facing the handle 24.
  • the three grinding plates 12, 14, 16 are designed to be identical and interchangeable.
  • a motor 26 has a drive shaft 28.
  • the motor 26 or its drive shaft 28 specifies a motor shaft axis 30.
  • the motor 26 drives a central wheel 34 via a pinion 32, which specifies the central wheel axle 22.
  • the central wheel 34 is driven by the pinion 32 via a spur gear 36.
  • the central wheel 34 has teeth 38 with which it drives three output shafts 40, of which only the front one can be seen in section AA. These output shafts 40 give again output shaft axes 42.
  • Each output shaft 40 is in turn provided for at least indirectly driving one grinding plate 12, 14, 16.
  • the central wheel 34 drives three spur gears 44 via the toothing 38 (of which the spur gear 44 driving the grinding plate 12 can be seen in section and the spur gear 44 driving the grinding plate 16 can be seen in the side view).
  • the front spur gear 44 drives the output shaft 40;
  • the drive mechanism is to be transferred analogously to all spur gears 44 driving the grinding plates 12, 14, 16.
  • the output shaft 40 is here, for example, mounted in a housing part 60 via at least one deep groove ball bearing 46.
  • a plain bearing 48 additionally supports the output shaft 40 in a further housing part 62.
  • the two housing parts 60, 62 form an output shaft housing 202.
  • the output shaft housing 202 together with a motor housing 200, which essentially encloses the motor 26, forms a main housing 64, which at least contains the motor 26, the central wheel 34 and the input and output shafts 28, 40 takes in.
  • the output shaft 40 engages via a driver 50 in the coupling means 52 of the sanding plate 12.
  • the sanding plate 12 can be clipped into a sanding plate holder 56 using locking hooks 54.
  • the grinding plate holder 56 is arranged in the area of an opening 100 of the housing part 60.
  • the coupling means 52 of the grinding plate 12 or the locking hooks 54 can be inserted into the grinding plate holder 56 or onto the driver 50 through the opening 100.
  • the grinding plate holder 56 also enables pivoting (here by a spherical plain bearing in a spherical holder in the housing part 60).
  • the gear shaft-like drive enables the grinding plate 12 to be tilted relative to the housing part 60 or relative to the grinder 10.
  • the central wheel 34 drives the grinding plates 12, 14, 16 in a forced rotating manner.
  • an oscillating drive or a randomly circular drive of the grinding plates 12 is also possible, for example by means of output shafts 40 which are eccentrically accommodated in the spur gear 44 and which drive the grinding plates 12, 14, 16 in a forcibly coupled or randomly rotating manner, or an eccentric which is caused by the restriction of degrees of freedom of the Grinding plate and / or the output shaft generates an oscillatory movement - or the like (not shown in detail here).
  • the drive shaft 28 or the motor shaft axis 30 is arranged eccentrically to the central wheel 34 or to the central wheel axle 22. It is between the front Output shaft axle 42 and the central wheel axle 22 are arranged. Both axes 22, 30 are cut through plane A or come to rest in it.
  • the motor 26 is displaced in the direction of the front sanding plate 12 or its sanding plate holder 56.
  • the motor 26 or its motor shaft axis 30 is arranged relative to the central wheel axis 22 opposite the handle 24.
  • the handle 24 is also cut in the middle by plane A, ideally divided in mirror symmetry.
  • the motor shaft axis 30, the central wheel axis 22 and the output shaft axes 42 are aligned parallel to one another.
  • the handle axis 66 or the center axis 86 or longitudinal axis 84 of the particularly rod-shaped handle 24 is arranged transversely to the central wheel axis 22.
  • the angle ⁇ is around 45-135°, in the present exemplary embodiment around 100°.
  • the handle 24 protrudes from the main housing 64.
  • the plane A or the cutting plane AA is, so to speak, also spanned by the handle axis 66 and the central wheel axis 22.
  • the handle 24 is rod-shaped, essentially round or oval or the like. It is formed by the handle housing 68, which can be formed at least partially in one piece with the main housing 64.
  • the handle 24 is intended to hold an accumulator 70. This can be permanently integrated or designed as a replaceable accumulator 70.
  • the present exemplary embodiment is designed as a replaceable plug-in accumulator 72. It is inserted into the free end 74 of the handle 24 and is releasably connected to the handle housing 68 via locking elements (not shown here).
  • a speed of the motor 26 can be adjusted using an adjusting wheel 76.
  • the handle 24 and the main housing 64 are ergonomically shaped.
  • the concave notch 78 in the transition from the handle 24 to the main housing 64 is used for intuitive gripping with the index finger.
  • This area can also be covered with a Softgripp 80.
  • other areas of the hand-held power tool can also be covered with specially haptic and/or tactile materials.
  • the top side 82 of the main housing 64 is also intended to support a hand, in particular the palm of the hand, be it to guide the hand-held power tool with two hands or with one hand, simply by gripping around the main housing 64.
  • Fig. 3 shows the grinder Fig. 1 in a sectional view BB in plane (B).
  • the drive shaft 28 drives the central wheel 34 via the pinion 32.
  • the motor shaft axis 30 and thus the motor 26 is arranged eccentrically to the central wheel 34. Namely shifted towards a front side 90 of the grinder 10.
  • the central wheel axle 22, the motor shaft axle 30 and the output shaft axle 42 of the front output shaft come to rest in plane A.
  • Plane B is spanned orthogonally to this plane A.
  • the output shafts 40 which are arranged mirror-symmetrically to plane A, come to rest in plane B.
  • the central wheel axle 22 is arranged in the center of a regular triangle 92, in the corners of which the three drive shaft axes 42 are arranged.
  • the three spur gears 44 are driven to rotate via the central wheel 34.
  • the spur gears 44 in turn drive the output shafts 40, which at least indirectly drive the grinding plates 12, 14, 16 or grinding plate holders 56 (cf. Fig. 2 ).
  • parts of the main housing 64 or the housing part 60 and the further housing part 62 are shown, which hold the input and output elements of the grinder 10 in position.
  • Fig. 4 shows the grinder 10 in a rest position on a support surface 94, for example a workpiece to be machined.
  • the grinder 10 rests on three points, namely on a free end 96 of the insertable accumulator 70 (alternatively, it could also rest on the free end 74 of the handle 24, in particular with an accumulator 70 firmly installed in the handle 24) and on the edge 98 the rear sanding plates 14, 16, in particular the two edge 98 of the sanding plates 14, 16 facing the free end 74, 96 of the handle 24 or insert accumulator 72 (whereby only the sanding plate 14 is visible since it covers the sanding plate 16).
  • the same reference numbers are assigned to the same components from the different figures, but they are not necessarily explained again for each figure.
  • Fig. 5 shows the hand tool or a grinder 10 in a side view.
  • the housing part 60 has three grinding plate receiving areas 102, of which in the Fig. 5 only two can be seen.
  • the area of the housing part 60 that supports the sanding plate holder 56 and its components such as bearings is defined as the sanding plate receiving area 102.
  • this is the area with the enveloping circle diameter 104 around the grinding plate receiving areas 102.
  • this area is in particular the immediately surrounding housing area 106 of the housing part 60, in Offset in the direction of the grinding plane 112 (to accommodate the bearings, better accessibility and/or to improve the freedom of movement of the grinding plates 12, 14, 16, for example when tilting/pivoting).
  • the surrounding housing area(s) 106 is set back from the sanding pad receiving area(s) 102.
  • this setback is not to be understood as a depression 108 in the sense of the invention.
  • the sanding plate receiving areas 102 each have openings 100 through which the removable sanding plates 12, 14, 16 can be connected to the sander 10.
  • the coupling means 52 and/or locking hooks 54 can thus be connected to the output shafts 40 and/or grinding plate holders 56 (see sectional view Fig. 2 ).
  • the grinding plate holders 56 or the output shafts 40 can also protrude through the grinding plate holder areas 102.
  • the housing part 60 has an air duct 120 between two adjacent sanding plate receiving areas 102 or the openings 100 (in the gap 122, so to speak). This is formed by a depression 108.
  • the distance 110 between the housing part 60 and a grinding plane 112 is increased, in particular increased compared to the distance 111 of the housing area 106 to the grinding plane 112.
  • the recess 108 is therefore set back relative to the housing area 106.
  • the recess 108 has a concave shape 118. It tapers towards the center of the housing part 60 or becomes narrower in the circumferential direction. In addition, an extent of deepening decreases in this direction.
  • the housing part 60 is therefore retracted or notched in the direction facing away from the grinding plane 112.
  • the distance 110 increases between the housing part 60 and grinding plane 112 along the air duct, or the recess 108, in the radial direction outwards, i.e. in the direction of the edge 116 of the housing part 60.
  • the depression 108 is therefore larger in the outer region of the housing part 60 than in a central region.
  • the depression 108 serves for better air flow.
  • the depression 108 forms at least part of an air duct 120, in particular for dust extraction.
  • a recess 108 is also provided between the rear sanding plates 14, 16 or the associated sanding plate receiving areas 102 (cf. Fig. 6 ).
  • the Fig. 6 which shows this depression in the rear view, it can also be seen that the depression or the distance 110 increases from the center region 114 of the housing part 60 to the edge 116 of the housing part 60 or from the center radially outwards.
  • the rear recess 108 is constructed mirror-symmetrically to plane A (see also section AA according to Fig. 2 ).
  • the recess 108 also enables a contact-free tilting 124 of the sanding plates 12, 14, 16 relative to the housing part 60. This means that, for example, when the sander 10 is in operation, one edge of the sanding plate 12, 14, 16 does not rub against the housing part 60.
  • the three recesses 108 between the sanding plates 12, 14, 16 and the grinding plate holders 56 are each arranged offset from one another by 120° starting from the center. They are each mirror-symmetrical to the bisectors of the uniform triangle.
  • Fig. 5 and 6 also show a housing separating edge 126.
  • the housing separating edge 126 is arranged between the housing part 60 and the further housing part 62. Both housing parts 60, 62 are part of the output shaft housing 202 or the main housing 64.
  • the housing separating edge 126 represents in particular a housing separating joint 130.
  • the housing separating edge 126 or the housing separating joint 130 is formed by assembled housing shells of the hand-held power tool or the grinder 10. It forms a setback in the housing surface. It runs all the way around the output shaft housing 202. It provides a form-fitting element 132, in particular a locking groove 134, for receiving a corresponding form-fitting element 136 of a dust extraction hood 138 (cf. Fig.
  • a locking extension 140 of a dust extraction hood 138 serves.
  • the positive locking element 132 can be used instead of a groove or depression in principle also represent a protuberance or male form-fitting element.
  • a female form-fitting element can be provided on the dust extraction hood 138 instead of a male one.
  • the recess 108 in the housing part 60 serves as a further form-fitting element 142, in particular as a stop element 144 for a further corresponding form-fitting element 146 on the dust extraction hood 138.
  • the form-fitting element(s) 146 as a stop or as a stopper. This means that the dust extraction hood 138 is not pushed too far onto the output shaft housing 202. As soon as the positive locking elements 146 strike, the positive locking elements 136 also snap into their intended position or into the corresponding positive locking elements 132.
  • Fig. 7 shows the dust extraction hood 138 in a perspective view. It is a removable dust extraction hood 138 for a hand-held power tool, in particular for the grinder 10, in particular wherein the hand-held power tool is designed to drive several, in particular tiltably mounted, rotating and/or oscillating and/or randomly circular grinding plates 12, 14, 16.
  • the dust extraction hood 138 has a connector 148 for connection to a dust extraction device (not shown here) - typically a mobile or stationary vacuum cleaner or dust extraction device.
  • the nozzle 148 projects outside 149 of the dust extraction hood 138.
  • the dust extraction hood 138 has a suction opening 150 extending from the nozzle 148, which is open to the interior 152 of the dust extraction hood 138.
  • the dust extraction hood 138 has a substantially triangular geometry, in particular a substantially regular triangular geometry. What is meant here by essentially is that the corners 154 of the “triangle” are as in Fig. 7 shown can be rounded. In addition, the legs 156 can also deviate from a straight shape to some extent, for example be slightly curved or the like.
  • the dust extraction hood 138 has an extension 158.
  • This serves to avoid cross air flow, especially from below 184 (cf. Fig. 8 ) of the extension 158, i.e. below the suction opening 150 facing away from the side of the extension 158.
  • the extension 158 projects into the interior 152 of the dust extraction hood 138.
  • the extension 158 has, starting from the suction opening 150, a main extension direction 160 into the interior 152 of the dust extraction hood 138.
  • the extension 158 has at least one, in particular two, walls 162. This serves to reduce the cross air flow, in particular to reduce the cross current from below 184 of the dust extraction hood 138 and/or from the side 164 within the dust extraction hood 138.
  • the extension 158 and/or the wall 162 can also be at least partially open to the side 166, 168, in particular to Enabling cross-air flow in at least this area 170, 172.
  • the extension 158 forms part of an air duct 159.
  • the part of the air duct 120 and the other part of the air duct 159 together form an air duct 120, 159.
  • the dust extraction hood 138 or the frame 174 of the dust extraction hood 138, is flexible, in particular transversely to the bottom or top of the dust extraction hood 138 or in the direction of the interior 152 or the exterior 149 of the dust extraction hood 138. This enables resilient pretensioning and/or pressing the dust extraction hood 138 to the hand-held power tool, in particular the grinder 10, or its housing. This allows a tool-free and/or secure and/or low-gap connection to the grinder 10 to be established.
  • the frame 174 or the dust extraction hood 138 tapers from bottom to top.
  • the frame 174 or the dust extraction hood 138 is tapered. This ensures that an upper edge 186 of the frame 174 or the dust extraction hood 138 can rest on the housing of the hand-held power tool with as little gap as possible.
  • the pretensioning force of the dust extraction hood 138 in this area can be particularly efficient.
  • the dust extraction hood 138 can be designed as a spacer and/or impact protection for the hand-held power tool or the grinder (see also Fig. 8 ).
  • the frame 174 or the rounded corners 154 and/or legs 156 serve as impact protection.
  • the dust extraction hood 138 also has a handle contour 176.
  • the handle contour 176 represents a slight elevation on the leg 156 or the frame 174. The friction between the finger and the dust extraction hood 138 when pressing or pulling the dust extraction hood 138 onto or from the grinder 10 is thereby improved.
  • the handle contour 176 resembles the silhouette contour 178 of at least one area of the hand-held power tool or the grinder (cf. Fig. 5 and 6 ).
  • the silhouette contour is formed by the contour of the edge 116 of the housing part 60, in particular in the area of the recess 108, especially when the edge 116 or the grinder 10 is viewed from the side.
  • Fig. 8 represents the system consisting of a hand-held power tool or grinder 10 with a connected or attached dust extraction hood 138.
  • the dust extraction hood 138 or the hand-held power tool or the grinder 10 preferably has a particularly elastic connecting element 179, in particular an elastic band 180 rubber-elastic band 180 for connecting the nozzle 148 or a nozzle adapter 182 and the grinder 10.
  • the elastic band 180 is tensioned, in particular between a free end 74, 96 of the handle 24 or accumulator 70, 72 of the grinder 10 and the socket 148 or socket adapter 182.
  • the elastic band is preferably captively fastened to the nozzle 148, the nozzle adapter 182 or the handle 24.
  • the band can also be detachable on one side, so that in the open state it can be attached to or around the other component and can be fixed again - for example with a push button, a locking mechanism or the like.
  • FIG. 9 Figure ad shows the hand tool or the grinder 10 of the previous figures in a shaded representation to make curvatures visible.
  • Figure 9a shows the grinder 10 in a side view, Figure 9b in a rear view, Figure 9c perspective view and Figure 9d in a top view.
  • the grinder 10 is for the simultaneous drive of three, in particular tiltable, rotating and / or oscillating and / or randomly circularly driven grinding plates 12, 14, 16, having at least one output shaft housing 202, which essentially has three output shafts 40 (here not shown, cf. in particular Fig. 2 ) orthogonal to the output shaft axes 42, 202, 204, 206 and a motor housing 200 that essentially encloses the motor 26 orthogonally to the motor shaft axis 30.
  • output shaft housing 202 which essentially has three output shafts 40 (here not shown, cf. in particular Fig. 2 ) orthogonal to the output shaft axes 42, 202, 204, 206 and a motor housing
  • the grinder 10 has a handle 24.
  • the front output shaft axis 42, 204 can be better distinguished from the rear output shaft axes 42, 206, 208 by the additional reference numbers.
  • the output shaft housing 202 encloses the three output shafts 40 at least substantially orthogonally to the output shaft axes 42.
  • the motor housing 200 encloses the motor 26 at least substantially orthogonally to the motor shaft axis 30.
  • a sectional surface 210 of the motor housing 200 orthogonal to the motor shaft axis 30 in a constricted region 212 of the motor housing 200 is less than relative to a sectional surface 214 of the output shaft housing 202 orthogonal to the output shaft axes 42 in an extended area of the output shaft housing 202, in particular the most extensive area 216 of the output shaft housing 202 70%, in particular less than 65%, preferably less than 55%. In the one shown Fig. 10 it is around 52%.
  • the extended area 216 is to be understood in particular as meaning the area with the largest sectional area 214 of the output shaft housing 202.
  • an extension for example the length 218 or the circumferential distance or length 215 around the output shaft housing 202, is maximum.
  • FIG. 9a-c also a length and a width of the motor housing 200 in the constricted area 212 and of the output shaft housing 202 in the extended area 216 are provided with the following reference numerals: output shaft housing 202: length 218, width 220; Motor housing: length 222, width 224.
  • the extended area 216 of the output shaft housing 202 is around 30% longer and around 65% wider than the constricted area 212 of the motor housing 200.
  • the sectional area ratio of the extended area 216 of the output shaft housing 202 compared to the constricted area 212 of the motor housing 200 is also around 190% (cf. Fig. 10 ).
  • the sectional area ratio of certain areas also emerges.
  • the cutting surface 214 of the output shaft housing 202 in a rear area 226 of the hand-held power tool or the grinder 10 is too small than 75%, in particular less than 50%, preferably less than 25% of the cut surface 210 of the motor housing 200 projected along the motor shaft axis 30, in particular in the constricted area 212.
  • the grinding surface 232 of grinding plates 14, 16 applied to the rear of the grinder 10 is less than 75%, in particular less than 50%, preferably less than 25%, of the cut surface 210 of the motor housing 200 projected along the motor shaft axis 30, especially in the constricted one Area 212, covered.
  • the cut surface 210 of the motor housing 200 projected along the motor shaft axis 30, in particular also in the constricted area 212 covers the cut surface 214 of the output shaft housing 202 to more than 70%, in particular to more than 90%, preferably completely.
  • the grinding surface 234 is covered by a grinding plate 12 applied to the front of the grinder 10 to more than 70%, in particular to more than 90%, preferably completely, of the cut surface 210 of the motor housing 200 projected along the motor shaft axis 30, in particular also in the constricted area 212 .
  • Fig. 10 also a circumferential length 211 of the motor housing 200 orthogonal to the motor shaft axis 30 or the output shaft axes 42 in a particularly constricted area 212 of the motor housing 200 relative to a circumferential length 215 of the output shaft housing 202 orthogonal to the output shaft axes 42, 204, 206, 208 in a particularly extended area 216 of the Output shaft housing 202. It is less than 80%, here around 70%. In other words, the circumferential length 215 of the output shaft housing 202 is around 145% compared to the circumferential length 211 of the motor housing 200 in the constricted area 212.
  • one, in particular two, of the three output shaft axes 42, in particular the two rear output shaft axes 206, 208 of the hand-held power tool lie outside the motor housing 200, in particular outside the constricted area 212 of the motor housing 200. These output shaft axes 206, 208 therefore at least do not intersect the motor housing 200 in the constricted area 212, especially nowhere. Furthermore, in particular one, preferably two, of the three output shaft axes 204, 206, 208 lie in particular the two rear output shaft axes 206, 208 of the hand-held power tool or the grinder 10, outside the handle 24, in particular the rod-shaped handle 24.
  • the front output shaft axis 204 of the hand-held power tool or the grinder 10 lies within the motor housing 200 and/or within a motor housing handle 236 - i.e. cuts this.
  • the aim here is to be in an angular range of 60°-120°, in particular 75°-105°, preferably 90° with respect to the input and output shaft axis ( n) 30, 204, 206, 208 can be understood.
  • This can advantageously provide a very compact hand-held power tool.
  • the center of gravity S thus moves as close as possible to the grinding plates 12, 14, 16.
  • a ratio of a total length 244 of the hand-held power tool is orthogonal to at least one input or output shaft axis 30, 42, 204, 206, 208, in particular from one end of the motor housing 200 up to one end of the rod-shaped handle 24, relative to a height 238, 240 of the hand-held power tool along at least one direction of the input or output shaft axis 30, 42, 204, 206, 208, in particular from a grinding plate level 112 to the end of the handle 24 or Motor housing 200, is larger than 10%, in particular larger than 25%, preferably around 40% larger.
  • the weight of the accumulator 72 is relative to the components of the drive train, in particular including the motor 26, the pinion 32, the central gear 34, the output shafts 40 and spur gears 44, around 10-50% more, in particular 30-40% more. This can positively influence the position of the center of gravity S.
  • a volume of the motor and output shaft housing 200, 202 compared to the rod-shaped handle housing 68 is around 20-70% more, in particular around 50% more.
  • a grinding machine housing 250 with at least one housing shell element 252 and with at least one further housing shell element 254 connected to the housing shell element 252, which at least partially form a handle 24, 258.
  • the grinding machine housing 250 is characterized by at least one ventilation opening 262, in particular a ventilation slot, formed at least in sections in the area of a separating edge 260 of the housing shell element 252 and the further housing shell element 254.
  • the ventilation opening 262 advantageously extends over two areas 264, 266, which are at an angle 268, in particular an angle 268 (cf. Fig.
  • the ventilation opening areas are advantageously aligned parallel to their main extension.
  • the ventilation opening 262, in particular that of the section 266 in the area of the handle 258, is advantageously intended to flow around the hand of a user, in particular to cool, warm and/or dry.
  • the housing shell element 252 and the further housing shell element 254 are connected to one another, in particular fixed to one another, in particular along an at least substantially entire contact line and/or surface of the housing shell element 252 and the further housing shell element 254, at least essentially free of visible fastening elements.
  • the handle 24, 258 is designed to be at least substantially free of separating edges, at least on one side of the handle 24, 258 that faces and/or faces away from a grinding plate 12, 14, 16 or the tool side.
  • the grinding machine housing 250 has a motor housing section 270 and a rod-shaped handle housing section 272, the grinding machine housing 250 having a concave indentation 278 or a dent in a transition region 276 between the rod-shaped handle housing section 272 and the motor housing section 270 (cf. Fig. 10 ).
  • This serves as an ergonomic contact surface for a finger, in particular a thumb of the user.
  • the dent is particularly noticeable in the side view Fig. 9a clearly visible.
  • the shading indicates the curved areas.
  • the ventilation opening(s) 262 can be formed by an offset of a housing edge of the housing shell element 252 and the further housing shell element 254.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Grinding-Machine Dressing And Accessory Apparatuses (AREA)

Claims (14)

  1. Machine-outil à main, en particulier meuleuse (10), destinée à entraîner simultanément plusieurs, de préférence trois, disques de meulage (12, 14, 16) notamment inclinables et/ou rotatifs et/ou oscillants et/ou entraînés circulairement de manière aléatoire, ladite machine-outil à main comportant un boîtier principal (64) qui reçoit au moins un moteur (26) destiné à entraîner les disques de meulage (12, 14, 16), et comprenant un boîtier formant poignée (68) qui forme une poignée (24) et fait saillie sensiblement transversalement au boîtier principal (64), le moteur (26) comportant un arbre d'entraînement (28) qui définit un axe de moteur (30), en outre une roue centrale (34) qui est entraînée par ce moteur (26) et qui définit un axe de roue central (22), et plusieurs, en particulier trois, arbres de sortie (40) qui sont entraînés par la roue centrale (34) qui définissent chacun un axe d'arbre de sortie (42), chaque arbre de sortie (40) étant prévu pour entraîner un disque de meulage (12, 14, 16) ou au moins un support de disque de meulage (56), caractérisée en ce que l'axe de moteur (30) est disposé de manière excentrique par rapport à l'axe de roue central (22) entre un axe d'arbre de sortie avant (40) et l'axe de roue central (22).
  2. Machine-outil à main selon au moins la revendication 1, caractérisée en ce que le moteur (26) ou son axe de moteur (30), par rapport à l'axe de roue central (22), est disposé par rapport à une poignée (24) ou un boîtier formant poignée (68), orientés transversalement à l'axe de roue centrale (22), en particulier une barre formant poignée, ou en ce que le boîtier formant poignée (68), qui forme une poignée (24), fait saillie du boîtier principal (64) notamment à la manière d'une barre de préhension.
  3. Machine-outil à main selon au moins la revendication 2, caractérisée en ce que la poignée (24) ou le boîtier formant poignée (68) est prévu(e) pour recevoir une batterie (70), en particulier une batterie remplaçable (70), de préférence une batterie enfichable remplaçable (72).
  4. Machine-outil à main selon au moins la revendication 2 ou 3, caractérisée en ce que la poignée (24) ou le boîtier formant poignée (68) font saillie d'un boîtier principal (64), qui reçoit au moins le moteur (26), la roue centrale (34) et les arbres d'entraînement et de sortie (28, 40), suivant un angle (α) de 45° à 135°, de préférence de 85 à 105°, en particulier par rapport à l'orientation de l'axe de roue centrale (22).
  5. Machine-outil à main selon l'une au moins des revendications 2 à 4, caractérisée en ce qu'un axe longitudinal (84), en particulier l'axe central (86) de la poignée (24), et l'axe de roue centrale (86) s'étendent dans un plan (A), deux arbres de sortie (40) étant disposés à symétrie de miroir par rapport au plan (A) .
  6. Machine-outil à main selon au moins la revendication 5, caractérisée en ce que l'arbre de sortie avant (40) se situe dans le plan (A).
  7. Machine-outil à main selon l'une au moins des revendications 5 ou 6, caractérisée en ce que l'axe de moteur (30) se situe dans le plan (A).
  8. Machine-outil à main selon l'une au moins des revendications 5 à 7, caractérisée en ce que le plan (A) coupe la batterie (70) et/ou le moteur (26) au milieu.
  9. Machine-outil à main selon l'une au moins des revendications précédentes, caractérisée en ce que le centre de gravité (S) de la machine-outil à main se situe par rapport à l'axe central de la roue (22) par rapport à l'axe de moteur (30), en particulier dans le plan (A), de manière particulièrement préférée dans une zone (88) qui s'étend depuis un plan de liaison des arbres de sortie (40), qui sont à symétrie de miroir par rapport au plan (A), à l'extrémité libre (74) de la poignée (24) à distance du rayon (r) d'un disque de meulage (12, 14, 16).
  10. Machine-outil à main selon l'une au moins des revendications précédentes, caractérisée en ce que la machine-outil à main est prévue pour un montage en trois points sur deux disques de meulage (14, 16) dirigés vers la poignée (24) et une extrémité libre (74, 96) de la poignée (24) ou de la batterie enfichable (72).
  11. Machine-outil à main selon l'une des revendications précédentes, caractérisée en ce que le rapport de la hauteur (238, 240) de la machine-outil à main en direction des axes d'arbre de sortie (42, 204, 206, 208), notamment une hauteur (238) d'un boîtier de moteur et d'arbre de sortie (200, 202) à la longueur (242) d'une poignée (24) sensiblement en forme de barre, en particulier une longueur (242) d'une poignée (24) en forme de barre qui fait saillie sensiblement orthogonalement au boîtier de moteur (200) ou à l'axe d'arbres d'entraînement et de sortie (30, 204) s'écarte de moins de 50 %, en particulier de moins de 75 %, de préférence de moins de 85 %, en particulier est à peu près identique.
  12. Machine-outil à main selon l'une des revendications précédentes, caractérisée en ce qu'un rapport d'une longueur totale (244) de la machine-outil à main orthogonalement à au moins un axe d'arbre d'entraînement ou de sortie (30, 42, 204, 206, 208) , en particulier d'une extrémité du boîtier de moteur (200) à une extrémité de la poignée (24) en forme de barre, relativement à une hauteur (238, 240) de la machine-outil à main le long d'au moins une direction de l'axe d'arbre d'entraînement ou de sortie (30, 42, 204, 206, 208), notamment depuis un plan de disque de meulage (112) jusqu'à l'extrémité de la poignée (24) ou du boîtier de moteur (200), est supérieur à 10 %, en particulier supérieur à 25 %, de préférence supérieur d'environ 40 %.
  13. Machine-outil à main selon l'une des revendications précédentes, comportant un boîtier de meuleuse (250), comprenant au moins un élément de coque de boîtier (252) et au moins un autre élément de coque de boîtier (254) relié à l'élément de coque de boîtier (252), lesquels forment au moins par portions une poignée (24, 258), caractérisée par au moins une ouverture d'aération (262), en particulier une fente d'aération, formée au moins par portions dans la zone d'un bord de séparation (260) de l'élément de coque de boîtier (252) et de l'autre élément de coque de boîtier (254), en particulier l'ouverture d'aération (262) s'étendant sur deux zones (264, 268) qui sont disposées suivant un angle (268), en particulier un angle (268) compris entre 90° et 120°, de préférence entre 100° et 105°, l'une par rapport à l'autre.
  14. Machine-outil à main selon l'une des revendications précédentes, comprenant un boîtier de meuleuse (250) qui comporte une portion de boîtier de moteur (270) et une portion de boîtier formant poignée (272) en forme de barre, le boîtier de meuleuse (250) comportant, dans une zone de transition (276) située entre la portion de boîtier formant poignée (272) en forme de barre et la portion de boîtier de moteur (270), une dépression concave (278), en particulier de manière à ce que celle-ci serve de surface d'appui ergonomique à un doigt, en particulier un pouce de l'utilisateur.
EP19832923.7A 2018-12-27 2019-12-19 Machine-outil portative Active EP3902655B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102018251730.4A DE102018251730A1 (de) 2018-12-27 2018-12-27 Handwerkzeugmaschine
DE102018251718.5A DE102018251718A1 (de) 2018-12-27 2018-12-27 Handwerkzeugmaschine
PCT/EP2019/086386 WO2020136086A1 (fr) 2018-12-27 2019-12-19 Machine-outil portative

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EP3902655A1 EP3902655A1 (fr) 2021-11-03
EP3902655B1 true EP3902655B1 (fr) 2024-02-07

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EP19832925.2A Active EP3902656B1 (fr) 2018-12-27 2019-12-19 Machine-outil portative

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US (1) US20220080548A1 (fr)
EP (2) EP3902655B1 (fr)
CN (2) CN113490572B (fr)
WO (2) WO2020136087A1 (fr)

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CH237159A (de) * 1943-08-19 1945-04-15 Buehler Ag Geb Fussbodenreinigungsgerät.
CH268486A (de) * 1948-09-25 1950-05-31 Mueller Bruetsch & Co Maschine zum Reinigen von Fussböden.
JP3015311B2 (ja) * 1996-12-11 2000-03-06 リョービ株式会社 電動工具の取っ手部位置決め機構
ES2235423T3 (es) * 1998-12-31 2005-07-01 C. & E. FEIN GMBH Herramienta electrica, especialmente amoladora angular.
DE19900404A1 (de) * 1998-12-31 2000-07-13 Fein C & E Elektrowerkzeug, insbesondere Winkelschleifer
JP3966447B2 (ja) * 2001-02-06 2007-08-29 株式会社マキタ オービタルサンダ
GB0123657D0 (en) * 2001-10-02 2001-11-21 The Technology Partnership Plc Worktool
DE10200381A1 (de) * 2002-01-08 2003-07-17 Guenther Boehler Gmbh Vorrichtung zur Bearbeitung von Oberflächen
DE502004003817D1 (de) 2003-04-09 2007-06-28 Guenther Boehler Gmbh Vorrichtung zur Bearbeitung von Oberflächen
DE102004055271A1 (de) * 2004-11-17 2006-05-18 Robert Bosch Gmbh Exzentervorrichtung
DE102010046629A1 (de) * 2010-09-17 2012-03-22 C. & E. Fein Gmbh Handwerkzeug
DE102013100085A1 (de) * 2013-01-07 2014-07-10 C. & E. Fein Gmbh Oszillierend angetriebene Werkzeugmaschine
DE102015121305A1 (de) * 2015-12-08 2017-06-08 Festool Gmbh Hand-Werkzeugmaschine
EP3181305A1 (fr) * 2015-12-17 2017-06-21 HILTI Aktiengesellschaft Machine-outil i sur batterie
DE102016223508A1 (de) * 2016-11-28 2018-05-30 Robert Bosch Gmbh Tragbare Werkzeugmaschine
CN108356656B (zh) * 2018-03-29 2023-08-25 广东博科数控机械有限公司 一种气动机械臂及采用该机械臂的自吸尘打磨抛光终端装置
CN108908027A (zh) * 2018-06-06 2018-11-30 浙江开创电气有限公司 手持角磨机

Also Published As

Publication number Publication date
EP3902656A1 (fr) 2021-11-03
EP3902656B1 (fr) 2024-08-28
CN113490572A (zh) 2021-10-08
CN113490573B (zh) 2023-10-27
CN113490573A (zh) 2021-10-08
US20220080548A1 (en) 2022-03-17
WO2020136086A1 (fr) 2020-07-02
WO2020136087A1 (fr) 2020-07-02
CN113490572B (zh) 2023-10-20
US20220055176A1 (en) 2022-02-24
EP3902655A1 (fr) 2021-11-03

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