EP3902656A1 - Handwerkzeugmaschine - Google Patents
HandwerkzeugmaschineInfo
- Publication number
- EP3902656A1 EP3902656A1 EP19832925.2A EP19832925A EP3902656A1 EP 3902656 A1 EP3902656 A1 EP 3902656A1 EP 19832925 A EP19832925 A EP 19832925A EP 3902656 A1 EP3902656 A1 EP 3902656A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- housing
- motor
- output shaft
- handle
- motor housing
- 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
Links
- 230000007704 transition Effects 0.000 claims abstract description 8
- 238000009423 ventilation Methods 0.000 claims description 20
- 238000007373 indentation Methods 0.000 claims description 6
- 210000003811 finger Anatomy 0.000 claims description 5
- 210000003813 thumb Anatomy 0.000 claims description 4
- 230000037431 insertion Effects 0.000 claims 1
- 238000003780 insertion Methods 0.000 claims 1
- 239000000428 dust Substances 0.000 description 38
- 238000000605 extraction Methods 0.000 description 36
- 230000005484 gravity Effects 0.000 description 5
- 238000001816 cooling Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000002372 labelling Methods 0.000 description 1
- 108090000623 proteins and genes Proteins 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
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 handheld power tool, in particular a grinder for simultaneously driving a plurality of, preferably for driving three, in particular tiltable, rotating and / or oscillating and / or randomly circularly driven grinding plates.
- Such hand machine tools are known for example on EP1466698.
- the invention relates to a handheld machine tool, in particular a grinder, for simultaneously driving a plurality of, preferably for driving three, in particular tiltable, rotating and / or oscillating and / or randomly driven grinding plates, comprising at least one output shaft housing which has at least three output shafts encloses orthogonal to the output shaft axes and a motor housing that essentially encloses the motor orthogonal to the motor shaft axis.
- a cut surface of the motor housing orthogonal to the motor shaft axis in a constricted area of the motor housing relative to a cut surface of the output shaft housing orthogonal to the output shaft axes in a particularly extensive area, in particular in the most extensive area of the output shaft housing, is less than 70%, in particular less than 65%, preferably less than 55%.
- the constricted area be found in particular in the area of a motor shaft or an area ortho gonal to the motor shaft of the motor.
- the constricted area is to be understood as a tapered area, in particular the area with the smallest cut area. Visibility on the surface to be processed is advantageously increased.
- the handheld power tool can be gripped more easily in different grip positions.
- the handle in particular in the form of a rod, extends beyond the grinding plate, as a result of which the force application point is shifted to the center of the several, in particular three, grinding plates.
- the grinder can also be gripped in the constricted area and / or a palm placed on the output shaft housing. As a result, the force application point can be shifted very close to the surface to be ground.
- Multiple grip positions for example, grasping on the rod-shaped handle, placing the palm in particular from above on the motor housing, grasping in the constricted area of the motor housing and / or laying on the palm in the area of the output shaft housing.
- the cut surface of the output shaft housing in a rear region of the hand machine tool is covered by less than 75%, in particular less than 50%, preferably less than 25%, of the cut surface of the motor housing projected along the motor shaft axis.
- the rear area is in particular the area facing a rod-shaped handle of the hand power tool.
- the front area is facing away from the handle in particular.
- the front could also be rich, which corresponds to a preferred direction of movement of the hand tool.
- the front can also be where an output shaft comes to rest in a mirror symmetry plane of the hand tool.
- the output shafts are spaced apart from the plane of mirror symmetry.
- the motor housing is advantageously arranged asymmetrically to the output shaft housing.
- the motor is arranged asymmetrically to the center of the Abtriebswellengekoru ses, in particular in the direction of the front side, preferably shifted eccentrically.
- the motor is a counterweight to the especially rod-shaped handle, preferably to the rear side protruding rod-shaped handle.
- the position of the center of gravity of the hand machine tool can be influenced positively. Visibility to the rear sanding pads is also improved.
- the grinder can be better controlled or guided. Unintentional damage, for example from elements vertically adjacent to the surface to be ground, can be avoided.
- a grip can be achieved, in particular grip of the rod-shaped handle above or between the drive shaft housing and the rod-shaped handle. The introduction of force or guidance of the hand tool can take place as close as possible to the grinding plates.
- the cut surface of the output shaft housing in a front area of the hand machine tool is more than 70%, in particular more than 90%, preferably completely covered by the cut surface of the motor housing projected along the motor shaft axis. As explained above, this has a positive influence on the center of gravity, the point of application of force and / or the balancing of engine weight and handle, which in particular accommodates an accumulator.
- one, in particular two, of the three output shaft axes, in particular the rear two output shaft axes of the hand machine tool lie outside the motor housing, in particular outside of the constricted region of the motor housing.
- the visibility of the material to be ground is increased.
- the hand tool, in particular the rod-shaped handle can be gripped better.
- An additional hand rest surface is created on the output shaft housing, especially in the area above the two rear output shafts.
- one, in particular two, of the three output shaft axes, in particular the rear two output shaft axes of the hand machine tool lie outside a handle, in particular a rod-shaped handle, preferably outside a dented area of the handle or dented transition area of the handle and motor housing .
- Handle and motor housing can be made very compact and / or narrow.
- the third in particular the front Abtriebswel lenachse of the hand machine tool, are within the motor housing and / or within the handle. This creates an asymmetry between the motor housing and the output shaft housing or causes an eccentricity of the motor relative to the center of the output shaft housing. As previously mentioned, this offers the advantages mentioned.
- an invention is based on the fact that a grinding machine housing with at least one housing shell element and with at least one further housing shell element connected to the housing shell element form at least in sections a handle, characterized by at least one ventilation opening formed at least in sections in the region of a separating edge of the housing shell element and the further housing shell element tion, in particular ventilation slot.
- the ventilation opening extends in particular over two areas, which are preferably arranged at an angle, in particular an angle between 90 ° and 120 °, preferably between 100 ° and 105 ° to one another.
- the length of the area areas in particular does not differ by more than 50%, they are preferably approximately the same length.
- the ventilation opening can in particular be arranged on the right and left of the aforementioned motor housing.
- the ventilation openings in particular provide a ventilation and exhaust air facility, in particular engine cooling and exhaust air.
- cooling air for the motor and / or the electronics of the hand machine tool can enter through one ventilation opening and exit the other ventilation opening.
- the ventilation opening (s) can be provided to cool the hand of a user and or to allow perspiration which arises when using the hand-held power tool to evaporate on the inside of the hand. This takes place with an area of the ventilation opening which is preferably arranged essentially horizontally and / or parallel to the handle orientation. The user friendliness can be increased in this way.
- the housing shell element and the further Ge housing shell element in particular along an at least substantially entire contact line and / or surface of the housing shell element and the further housing shell element, are connected to one another at least substantially free of visible fastening elements, in particular are fixed to one another.
- the aesthetics and ergonomics are increased.
- the device is easier to clean. Annoying holes in the area of the gripping surfaces are eliminated.
- the handle of the grinding machine housing be formed at least on one side of the handle facing and / or facing away from the tool, at least essentially free of separating edges. This also increases ergonomics.
- the assembly of the hand tool machine is simplified. Externally visible screwing elements can be avoided. Ventilation openings can be integrated in the side edges in particular.
- a grinder housing having a motor housing section and a rod-shaped handle housing section
- the grinding machine housing having a concave indentation, in particular a dent, in a transition region between the rod-shaped handle housing section and the motor housing section.
- This can result in an ergonomic contact surface for a finger, in particular a thumb of the user.
- the grinder housing can be encompassed even better, the grip is improved, slipping is more difficult.
- the concave indentation on both sides in particular serves as an ergonomic contact surface for the thumb and / or pointer.
- Figure 1 shows the handheld power tool in a front view.
- FIG. 2 shows the hand-held power tool in a sectional view A-A
- FIG. 3 shows the hand-held power tool in a sectional view B-B
- Figure 4 shows the handheld power tool in a side view in a rest position.
- Figure 8 shows the system of handheld power tool and dust extractor hood in a side view.
- Fig. 9a-d the hand tool in a hatched representation in four views
- FIG. 11 shows the handheld power tool in a perspective view.
- FIG. 1 shows the handheld power tool in the form of a grinder 10 in a front view.
- the grinder 10 is for the simultaneous drive of three Schleiftel learn 12, 14, 16 provided.
- the grinder 10 can be activated via an actuation switch 18.
- a labeling element 20 assigns this device advantageously 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 the plane A (cf. FIG. 1).
- the front Schleiftel ler 12 is arranged in front of a central wheel axis 22. It is arranged with respect to a central ralradachse 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 axis 22 facing the handle 24.
- the three sanding plates 12, 14, 16 are constructed identically and are 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, which specifies the central wheel axis 22.
- the central gear 34 is driven by the pinion 32 via a spur gear 36.
- the central wheel 34 has a toothing 38 with which it drives three output shafts 40, of which only the front one can be seen in section AA. From this drive shafts 40 in turn provide output shaft axes 42.
- Each drive shaft 40 is in turn provided for the at least indirect drive of one grinding plate 12, 14, 16.
- the central gear 34 drives three spur gears 44 via the toothing 38 (of which the spur gear 44 driving the grinding plate 12 and the spur gear 44 driving the grinding plate 16 can be seen in a side view).
- the front spur gear 44 drives the output shaft 40; At the drive mechanism is analog to all, the grinding plate 12, 14, 16 driving spur gears 44 to be transferred.
- the output shaft 40 is supported here by way of example via at least one deep groove ball bearing 46 in a housing part 60.
- a slide 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 drive shaft housing 202 forms together with a motor housing 200, which essentially encloses the motor 26, a main housing 64, which has at least the motor 26, the central wheel 34 and the input and output shafts 28, 40 records.
- the output shaft 40 engages via a driver 50 in Koppelungsmit tel 52 of the grinding plate 12.
- the grinding plate 12 can by means of locking hook 54 in a Sanding disc holder 56 are clipped.
- the grinding plate receptacle 56 is rich in an opening 100 of the housing part 60 is arranged. Through the opening 100, the coupling means 52 of the grinding plate 12 or the latching hook 54 can be inserted into the grinding plate receptacle 56 or onto the driver 50.
- the grinding plate receptacle 56 also enables pivoting (here by means of a spherical sliding bearing in a spherical receptacle of the housing part 60).
- the joint shaft-like drive enables the grinding plate 12 to tilt relative to the housing part 60 or relative to the grinder 10.
- the central wheel 34 forcibly rotates the grinding plates 12, 14, 16.
- an oscillating drive or a randomly circular drive of the grinding plates 12 is also possible, for example by output shafts 40 which are eccentrically accommodated in the spur gear 44 and which forcibly couple the grinding plates 12, 14, 16 or rotate randomly, or an eccentric which is restricted by degrees of freedom the grinding plate and / or the drive shaft from an oscillating movement generated - or the like (not shown here).
- the drive shaft 28 or the motor shaft axis 30 is arranged eccentrically to the central wheel 34 or to the central wheel axis 22. It is arranged between the frontseiti gene output shaft axis 42 and the central wheel axis 22. Both axes sen 22, 30 are cut through the plane A or come to lie in it.
- the motor 26 is displaced in the direction of the front-side grinding plate 12 or its grinding-plate holder 56.
- the motor 26 or its motor shaft axis 30 is based on the central wheel axis 22 relative to the handle 24 is arranged.
- the handle 24 is also cut in the middle by plane A, ideally divided mirror-symmetrically.
- 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 rod-shaped handle 24, in particular, is arranged perpendicular to the central wheel axis 22.
- the angle a 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 section plane AA is also spanned to a certain extent by the handle axis 66 and the central wheel axis 22.
- the handle 24 is rod-shaped, essentially Lichen round or oval or the like. It is through the handle housing 68th formed, which can be formed at least partially in one piece with the main housing 64.
- the handle 24 is provided for receiving an accumulator 70.
- This can be permanently integrated, or can be designed as an exchangeable accumulator gate 70. In the present exemplary embodiment, it is designed as a removable plug-in accumulator 72. It is inserted into the free end 74 of the handle 24 and is detachably connected to the handle housing 68 via latching elements (not shown here). Optionally, a speed of the motor 26 can be set via 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 soft grip 80. Of course, other areas of the hand tool can also be covered with special haptic and / or tactile materials.
- the top 82 of the main housing 64 is provided to rest a hand, in particular the palm of the hand, be it the hand tool machine two-handed or one-handed, only by grasping the Hauptgeophu ses 64, lead.
- Fig. 3 shows the grinder of Fig. 1 in a sectional view BB in the 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. That is, in the direction of a front side 90 of the grinder 10.
- the central wheel axis 22, the motor shaft axis 30 and the output shaft axis 42 of the front output shaft come to rest in plane A.
- Level B is orthogonal to this level A.
- the output shafts 40 arranged mirror-symmetrically to plane A come to rest.
- the central wheel axis 22 is net angeord 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 in rotation via the central wheel 34.
- the front wheels 44 in turn drive the output shafts 40, which at least indirectly drive the grinding plates 12, 14, 16 or grinding plate receptacles 56 (see FIG. 2).
- parts of the main housing 64 and the housing part 60 and the white housing part 62 are shown, which hold the input and output elements of the grinder 10 in position.
- 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 retractable accumulator 70 (alternatively, it could also lie on the free end 74 of the handle 24, in particular in a permanently installed accumulator 70 in the handle 24) and on the Edge 98 of 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 slide-in accumulator 72 (only the sanding plate 14 being visible since it conceals the sanding plate 16).
- the same reference numerals are assigned to the same construction parts 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 only two can be seen in FIG. 5.
- the area of the housing part 60 which supports the sanding plate seat 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 offset from a particular immediately surrounding housing area 106 of the housing part 60, 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 grinding plate receiving area (s) 102.
- this setback is not to be understood as a depression 108 in the sense of the invention.
- the grinding plate receiving areas 102 each have openings 100 through which the removable grinding plates 12, 14, 16 can be connected to the grinder 10.
- the coupling means 52 and / or latching hooks 54 can be connected to the output shafts 40 and / or grinding plate receptacles 56 (see sectional view in FIG. 2).
- the grinding plate receptacles 56 or the drive shafts 40 can protrude through the grinding plate receiving areas 102.
- the grinding plate receiving region 102 can also be understood only as the region which represents the opening 100; or the area that supports the output shafts 40 in the housing part 60 of the hand tool machine.
- the housing part 60 has an air duct 120 between two adjacent grinding plate receiving areas 102 and the openings 100 (as it were in the intermediate space 122). 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 from the grinding plane 112.
- the depression 108 is accordingly set back relative to the housing area 106
- Indentation 108 has a concave shape 118. It runs towards the center of the housing part 60 or becomes narrower in the circumferential direction. In addition, the extent of deepening in this direction decreases. The housing part 60 is thus retracted or notched in the direction facing away from the grinding plane 112.
- the distance 110 between the housing part 60 and the grinding plane 112 takes along that of the air duct , or the Vertie fung 108, in the radial direction to the outside, ie in the direction of the edge 116 of the housing part 60, too.
- the depression 108 is therefore larger in the outer region of the housing part 60 than in a central region.
- the depression 108 is used for better air guidance.
- 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 grinding plates 14, 16 and the associated grinding plate receiving areas 102 (cf.
- the rear recess 108 is constructed mirror-symmetrically to level A (see also section AA according to FIG. 2).
- the recess 108 also enables a contact-free tilt 124 of the grinding plates 12, 14, 16 relative to the housing part 60.
- the three recesses 108 between the Sanding pads 12, 14, 16 and the sanding disk receptacles 56 are arranged offset from each other by 120 ° from the center. They are each mirror-symmetrical to the bisector of the even triangle.
- 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 in particular represents a housing separating joint 130.
- the housing separating edge 126 or the housing separating joint Ge is formed by composite housing shells of the hand tool or the grinder 10. It forms a backset in the housing surface. It is circumferential around the output shaft housing 202. It represents a positive locking element 132, in particular a locking groove 134, for receiving a corresponding positive locking element 136 of a dust extraction hood 138 (see FIG. 7), preferably a locking extension 140 of a dust extraction hood 138.
- the form-locking element 132 can in principle also represent a protuberance or male form-locking element instead of a groove or recess.
- a female positive locking 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-locking element 142, in particular as a stop element 144 for a further corresponding form-locking element 146 on the dust extraction hood 138.
- the positive-locking element or elements 146 serve as a stop or as a stopper.
- the dust extraction hood 138 is not pushed too far onto the output shaft housing 202. As soon as the positive locking elements 146 stop, the positive locking elements 136 also snap into their intended position or into the corresponding positive locking elements 132. 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 a plurality of, in particular tiltably mounted, rotating and / or oscillating and / or randomly drivable grinding plates 12, 14, 16 .
- the dust extraction hood 138 has a nozzle 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 protrudes outside 149 of the dust extraction hood 138.
- the dust extraction hood 138 has a suction opening 150 extending from the nozzle 148, which surface is open to the interior 152 of the dust extraction hood 138.
- the dust extraction hood 138 has an essentially triangular geometry, in particular an essentially regular triangular geometry. Essentially, it should be understood here that the corners 154 of the “triangle” can be rounded as shown in FIG. 7.
- the legs 156 can also differ from a straight shape to a certain extent, for example, be slightly curved or the same.
- the dust extraction hood 138 has an extension 158. This serves to avoid cross air flow, in particular from under half 184 (cf. FIG. 8) of the extension 158, that is to say below the side of the extension 158 facing away from the suction opening 150.
- the extension 158 projects into the interior 152 of the dust extraction hood 138.
- the extension 158 points outward From the suction opening 150 a main direction 160 in the interior 152 of the dust hood 138.
- the extension 158 also has at least one, in particular two, walls 162. This serves / serve the reduction of cross-air flow, in particular the reduction of cross-flow from below 184 of the dust extraction hood 138 and / or from the side 164 inside the dust extraction hood 138.
- the extension 158 and / or the wall 162 can also be opened at least partially laterally 166, 168 , in particular for cross air flow possible 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 inside 152 or the exterior 149 of the dust extraction hood 138.
- the frame 174 or the dust extraction hood 138 tapers from the bottom to the top. In the area of the interlocking elements 136, for connection to the interlocking elements 142 of the hand power tool, 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 against the housing of the handheld power tool as gap-free as possible. The pretensioning force of the dust extraction hood 138 in this area can thus act particularly efficiently.
- the dust extraction hood 138 can be designed as a spacer and / or stop protection for the hand tool or the grinder (cf. also FIG. 8). Instead of the housing of the grinder 10, the frame 174 or the rounded corners 154 and / or legs 156 serve as stop protection.
- the dust extraction hood 138 also has a grip contour 176.
- the grip 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 the dust extraction hood 138 is pressed or pulled off onto or from the grinder 10 is thereby improved.
- the grip contour 176 resembles the silhouette contour 178 of at least one area of the hand tool or the grinder (see FIGS. 5 and 6).
- the silhouette contour is formed by the contour of the edge 116 of the housing part 60, in particular in the region of the depression 108, in particular when the edge 116 or the grinder 10 is viewed from the side.
- Fig. 8 shows the system of handheld power tool or grinder 10 with a connected or attached dust extraction hood 138.
- the dust extraction hood 138 or the handheld machine tool or grinder 10 has a particularly elastic connecting element 179, in particular an elastic band 180, preferably a rubber elastic band 180 for connecting the nozzle 148 or a nozzle adapter 182 and the grinder 10.
- the elastic band 180 is stretched, in particular between a free end 74, 96 of the handle 24 or accumulator 70, 72 of the grinder 10 and the nozzle 148 or nozzle adapter 182.
- the elastic band is captively attached to the nozzle 148, nozzle adapter 182 or the handle 24.
- the band can also be detachable on one side, so that it can be struck or folded over on or around the other component in the open state and can be fixed again - for example with a push button, a locking mechanism or the like.
- FIG. 9 Figure ad shows the hand-held power tool, or the grinder 10 of the previous figures, in a shaded representation in order to also make bulges visible.
- Figure 9a shows the grinder 10 in a side view
- Figure 9b in a rear view
- Figure 9c in a perspective view
- 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 circular-shaped grinding plates 12, 14, 16, comprising at least one drive shaft housing 202, which essentially has three output shafts 40 (not shown here, see in particular Fig.
- the grinder fer 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 numerals.
- 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 cut 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 relative to a cut surface 214 of the output shaft housing 202 orthogonal to the output shaft axes 42 in an extended output shaft housing 202, in particular the most extensive region 216 of the output shaft housing 202 than 70%, in particular less than 65%, preferably less than 55%. 10 it is around 52%. Under the extended area 216 is in particular the area with the largest cut area
- an extension e.g. the length 218 or the circumferential distance or length
- a length and a width of the motor housing 200 in the constricted region 212 and of the output shaft housing 202 in the extended region 216 are also provided with the following reference symbols: output shaft housing 202: Length 218, width 220; Motor housing: length 222, width 224.
- output shaft housing 202 Length 218, width 220
- Motor housing length 222, width 224.
- the extended area 216 of the output shaft housing 202 compared to the constricted area 212 of the motor housing 200 is around 30% longer and around 65% wider.
- the sectional area ratio of the extended region 216 of the output shaft housing 202 compared to the constricted region 212 of the motor housing 200 is also around 190% (cf. FIG. 10).
- the cut surface 214 of the output shaft housing 202 in a rear region 226 of the hand tool or grinder 10 is less than 75%, in particular less than 50%, preferably less than 25% of the cut surface 210 of the motor housing projected along the motor shaft axis 30 200, especially in the constricted area 212, covered.
- the grinding surface 232 of grinding discs 14, 16 applied to the back of the grinder 10 is less than 75%, in particular less than 50%, preferably less than 25% of the surface 210 of the motor housing 200 projected along the motor shaft axis 30, in particular in the constricted area 212, covered.
- a front area 228 of the handheld power tool covers the cut surface 210 of the motor housing 200 projected along the motor shaft axis 30, in particular also in the constricted area 212, which Cut surface 214 of the output shaft housing 202 to more than 70%, in particular more than 90%, preferably completely.
- the grinding surface 234 of a grinding plate 12 applied to the front of the grinder 10 is more than 70%, in particular more than 90%, preferably completely of the cutting surface 210 of the motor housing 200 projected along the motor shaft axis 30, in particular also in the constricted region 212 , covered.
- the 10 is also a circumferential length 211 of the motor housing 200 or thogonal 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 egg ner circumferential length 215 of the output shaft housing 202 orthogonal to the output shaft axes 42, 204, 206 , 208 in a particularly extensive loading area 216 of the output shaft housing 202. It is less than 80%, here about 70%. In other words, the circumferential length 215 of the drive shaft housing 202 is around 145% of the circumferential length 211 of the motor housing 200 in the constricted region 212.
- the front output shaft axis 204 of the hand-held machine tool or grinder 10 lies within the motor housing 200 and / or within a motor housing handle 236 - so it cuts this.
- 9a also shows that the ratio of the height 238, 240 of the hand tool in the direction of the Abretenach sen 42, 204, 206, 208, in particular a height 238 of a motor and from the drive shaft housing 200, 202, to the length 242 of an essentially rod-shaped handle 24, in particular a length 242 of an essentially orthogonal to the motor housing 200 or the input and output shaft axis 30, 204 from the standing rod-shaped handle 24, deviates by less than 50%, in particular by less than 75 % deviates, preferably deviates by less than 85%, in particular is approximately identical.
- an angle 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.
- a very compact handheld power tool can thereby advantageously be provided.
- the center of gravity S thus moves as close as possible to the grinding plates 12, 14, 16.
- a ratio is a total length 244 of the handheld machine tool 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 protruding hand grip 24, relative to a height 238, 240 of the hand tool along at least one direction of the input or output shaft axis 30, 42, 204, 206, 208, in particular from a grinding plate plane 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 battery 72 relative to the components of the drive train, in particular comprising the motor 26, the pinion 32, the central wheel 34, the output shafts 40 and spur gears 44, is approximately 10-50% more, in particular 30-40% more . This can have a positive influence on the position of the center of gravity S.
- a volume of 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 goes further Housing shell element 252 and with at least one further housing shell element 254 connected to the housing shell element 252, which at least in sections 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 region 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 arranged at an angle 268, in particular an angle 268 (cf. FIG. 10, side view) between 90 ° and 120 °, preferably between 100 ° and 105 ° are.
- the angle is advantageously based on the orientation of the rod-shaped handle to the motor housing.
- the ventilation opening areas are advantageously aligned parallel to their main extension.
- the ventilation opening 262, in particular that of section 266 in the region of the handle 258, is advantageously provided to flow around the hand of a user, in particular to cool, heat and / or dry it.
- the housing shell element 252 and the further housing shell element 254, are 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 substantially free of visible fastening elements connected to one another, in particular fixed to one another.
- the handle 24, 258 is at least on one side of the handle 24 facing and / or facing away from a grinding plate 12, 14, 16 or 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 (see FIG. 10).
- This serves as an ergonomic contact surface for a finger, in particular a user's thumb.
- the dent can be seen particularly well in the side view of FIG. 9a.
- the shading indicates the domed areas.
- Preferred as is / are the ventilation opening (s) 262 by an offset of a housing edge of the housing shell element 252 and the further housing shell element 254 can be formed.
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)
Abstract
Description
Claims
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/EP2019/086389 WO2020136087A1 (de) | 2018-12-27 | 2019-12-19 | Handwerkzeugmaschine |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3902656A1 true EP3902656A1 (de) | 2021-11-03 |
Family
ID=69147646
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19832925.2A Pending EP3902656A1 (de) | 2018-12-27 | 2019-12-19 | Handwerkzeugmaschine |
EP19832923.7A Active EP3902655B1 (de) | 2018-12-27 | 2019-12-19 | Handwerkzeugmaschine |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19832923.7A Active EP3902655B1 (de) | 2018-12-27 | 2019-12-19 | Handwerkzeugmaschine |
Country Status (4)
Country | Link |
---|---|
US (2) | US20220055176A1 (de) |
EP (2) | EP3902656A1 (de) |
CN (2) | CN113490573B (de) |
WO (2) | WO2020136086A1 (de) |
Family Cites Families (30)
Publication number | Priority date | Publication date | Assignee | Title |
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US1868507A (en) * | 1930-01-25 | 1932-07-26 | Freed A | Portable sander and polisher |
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. |
US2759305A (en) * | 1954-06-11 | 1956-08-21 | Cyclo Mfg Company | Portable abrading and polishing machine |
US3775800A (en) * | 1971-12-20 | 1973-12-04 | M Veneziani | Rotary brush |
US4168560A (en) * | 1978-10-12 | 1979-09-25 | Doyel John S | Battery-driven cleaning device |
US5500972A (en) * | 1994-11-07 | 1996-03-26 | Foster; David C. | Rotating back scrubber |
DE19733463A1 (de) * | 1996-08-07 | 1998-02-12 | Leo Lustig | Schleifmaschine |
DE19649282C1 (de) * | 1996-11-28 | 1998-06-10 | Witte Metallwaren Gmbh | Vorrichtung zum Schleifen oder Polieren von Böden oder Flächen |
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 |
EP1016504B1 (de) * | 1998-12-31 | 2005-01-19 | C. & E. Fein GmbH | Elektrowerkzeug, insbesondere Winkelschleifer |
DE19900404A1 (de) * | 1998-12-31 | 2000-07-13 | Fein C & E | Elektrowerkzeug, insbesondere Winkelschleifer |
US6185781B1 (en) * | 1999-06-24 | 2001-02-13 | The Hoover Company | Hand scrub tool with interchangeable scrub drives |
JP3966447B2 (ja) * | 2001-02-06 | 2007-08-29 | 株式会社マキタ | オービタルサンダ |
US7261623B1 (en) * | 2001-07-23 | 2007-08-28 | Onfloor Technologies, L.L.C. | Wood floor sanding machine |
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 |
US7022004B2 (en) * | 2002-01-08 | 2006-04-04 | Boehler Daniel | Device for the treatment/working of surfaces |
EP1620229A1 (de) * | 2003-03-28 | 2006-02-01 | The Technology Partnership Public Limited Company | Rotierendes werkzeug mit planetenrädern, die exzentrische achsen zur befestigung von schleif- oder polierplatten enthalten |
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 |
US7416478B2 (en) * | 2005-10-05 | 2008-08-26 | Vankouwenberg Raymond E | Planetary drive heads for grinding/polishing pads |
US7563156B2 (en) * | 2007-09-13 | 2009-07-21 | National Carpet Equipment, Inc. | Planetary grinder |
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 (de) * | 2015-12-17 | 2017-06-21 | HILTI Aktiengesellschaft | Akkubetriebene handwerkzeugmaschine i |
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 |
-
2019
- 2019-12-19 CN CN201980093117.XA patent/CN113490573B/zh active Active
- 2019-12-19 WO PCT/EP2019/086386 patent/WO2020136086A1/de unknown
- 2019-12-19 US US17/417,588 patent/US20220055176A1/en active Pending
- 2019-12-19 EP EP19832925.2A patent/EP3902656A1/de active Pending
- 2019-12-19 WO PCT/EP2019/086389 patent/WO2020136087A1/de unknown
- 2019-12-19 CN CN201980093091.9A patent/CN113490572B/zh active Active
- 2019-12-19 US US17/417,606 patent/US20220080548A1/en active Pending
- 2019-12-19 EP EP19832923.7A patent/EP3902655B1/de active Active
Also Published As
Publication number | Publication date |
---|---|
CN113490573B (zh) | 2023-10-27 |
EP3902655B1 (de) | 2024-02-07 |
WO2020136086A1 (de) | 2020-07-02 |
US20220080548A1 (en) | 2022-03-17 |
WO2020136087A1 (de) | 2020-07-02 |
CN113490572B (zh) | 2023-10-20 |
EP3902655A1 (de) | 2021-11-03 |
US20220055176A1 (en) | 2022-02-24 |
CN113490572A (zh) | 2021-10-08 |
CN113490573A (zh) | 2021-10-08 |
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