CN1116818A

CN1116818A - Floor-cleaning device

Info

Publication number: CN1116818A
Application number: CN94191020A
Authority: CN
Inventors: 威兰·古纳; 金泰尔·马拉范特; 马里恩·特奇尔蒂
Original assignee: Vorwerk and Co Interholding GmbH
Current assignee: Vorwerk and Co Interholding GmbH
Priority date: 1993-11-26
Filing date: 1994-10-28
Publication date: 1996-02-14
Also published as: DE4340367C2; JPH08508665A; KR960700021A; CA2154758A1; DE4340367A1; EP0681445A1; WO1995014423A1

Abstract

The invention relates to a device (G) for cleaning floors with a driven cleaning insert, e.g. a buffing disc (13), fitted on a supporting disc (10) and a separate front or corner brush (B) which can be releasably switched on, in which, after switching on, the brush (B) is driven via the rotating supporting disc (10) and in which the supporting disc (10) is fitted to a housing (16) forming a bearing axis pin (18). In order to expose the device to the minimum of negative effects in its drive behavior from an external power feed, the invention proposes that, when the brush (B) is switched on, a direction of the pressing power (F) between a drive wheel (48) acting on the brush (B) and the supporting disc (10) passes through the axis pin (18) or very closely to it.

Description

Floor-cleaning device

The present invention relates to a kind of floor-cleaning device, has a cleaning assembly that is driven that is placed on the supporting disk on it, for example brush at the preceding brush of a brush dish and independent a triggered connection or angle, connecting the transmission mechanism that behind the supporting disk that rotates angle speed is worked for one, simultaneously, this supporting disk relies on a bolster to be placed on the device case.

The floor-cleaning device of this spline structure is disclosed in DE-OS 4110682.A kind of brush and polishing mechanical that is used for floor processing processing of its expression is provided with three brush dishes or polishing disk in its bottom side, and it is driven together by a motor.This device is provided with angle brush in two folding corner regions in front, they are placed in one respectively can overcome spring force and on the angular lever of deflection.To the housing component imposed load of a movable front valance panel shape time, this additional angle brush just always brought to a nearest brush dish or polishing disk mutually by putting, like this, additional angle is brushed and has just been connected.

The object of the present invention is to provide a kind of improved floor-cleaning device, so that the driveability of device can be owing to the external force effect causes adverse influence.

The objective of the invention is this realization, a kind of floor-cleaning device promptly is provided, comprise: one is placed in the cleaning assembly that is driven on the supporting disk as a brush dish, the preceding brush of independent a triggered connection or angle brush, the transmission mechanism that the angle brush is worked, simultaneously, this supporting disk relies on a bolster to be placed on the device case, under the situation that the angle brush is connected, act on the driven pulley of angle brush and the forced direction of the extruding force between the supporting disk and pass through near bolster or the bolster.

This floor-cleaning device by the design of improving one's methods has an assembly that is driven and an independent preceding brush or an angle that is placed on the supporting disk and brushes, and the drive characteristic of this device can be owing to the external force effect causes adverse influence.It can realize like this that promptly when connecting the angle brush, a diagonal angle is brushed the driven pulley and the extruding force action direction between the supporting disk that work and passed through near supporting disk axle or the axle.For the driven pulley of angle brush configuration and the point of the extruding between the supporting disk and driven pulley to the action direction of supporting disk by design, make axle or the axle vicinity of a synthetic force direction by supporting disk.So just can guarantee, when the angle brush is connected, can not cause adverse effect supporting disk.This just means, can or just not form very small torque in the scope of supporting disk axis, can not cause adverse effect to the performance of supporting disk.This is to supporting disk device advantageous particularly, and promptly the run-on point of this supporting disk can be located on the pivoted lever of revolution arrangement, and pivoted lever is placed on the bolster of this supporting disk device case side.These pivoted levers push each other or are expressed on the motor gear by the axis that spring centers on separately.Start among the described disclosed embodiment at this paper, when this active force that synthesizes is connected at the angle brush, act on distant place into the supporting disk of angle brush configuration.Such result is to act on a big relatively torque on the pivoted lever of supporting disk, thereby causing the extruding force between supporting disk and motor gear to descend.Therefore when the angle brush switched on and off, supporting disk just can not carry out even transmission.In contrast, the advantageous particularly that the present invention then shows, because as already mentioned, the forced direction of extruding force is by near the position axle of pivoted lever or this axle, so just do not exist or have only a very small torque, it can not have adverse influence to the extruding force between supporting disk and the motor gear.Therefore, connect the angle brush and do not skid, so whether supporting disk will irrelevant for being switched on or switched off with the angle brush with even speed work continuously with regard to not producing.Just guarantee that by this configuration the squeezing action power between supporting disk and the motor gear can not cause change owing to the connection of angle brush.This means that also the squeezing action power between supporting disk and the motor gear can not cause raising, therefore can not cause the wearing and tearing of member to strengthen.More favourable way is that setting is selected to structure, and the distance that makes synthetic active force depart from the supporting disk axle farthest is about 1/8 of supporting disk diameter.This departs from and is interpreted as the vertical range of synthesis force direction to the best forced direction that passes through axis, wherein this distance is approximately 1/8 of supporting disk diameter, and can be in the both sides of supporting disk axle, also promptly produce and depart from the both sides of ideal role force direction.Thus, just produce a share zone in from the extruding point of brush driven pulley in angle on supporting disk to supporting disk axle scope, make a concerted effort by this zone.This distance that departs from is so small, so that can not cause adverse influence on supporting disk, especially can not produce the moment of torsion of negative interaction.Stipulate that in a favourable modification of technical solution of the present invention connecting the angle brush is to realize by a tension spring to the driven pulley effect.Run into an object for example when furniture or analog at mobile device, then the angle brush moves by the direction of a tension spring that driven pulley is worked toward supporting disk, and supporting disk just drives the driven pulley of brush subsequently, and like this, the angle brush just is switched on.In aforesaid prior art, the connection of this angle brush is to realize by a compression spring that is placed between driven pulley and device case movable.Such shortcoming is, is subjected to over burdening to do the time spent at movable housing component, and this compression spring will too be out of shape and therefore the extruding force of maximum is delivered on the driven pulley.This just causes supporting disk to produce excessive stress deformation, and therefore its rotating property is had adverse influence.In addition, can cause undue wearing and tearing for the supporting disk that for example is provided with the rubber friction face.But do not have this situation for the present invention.Be that especially the unnecessary active force that is produced when device piece of furniture of strong bump or analog can almost completely bear by tension spring on the contrary herein.This design has its unique significance because with regard to purpose of the present invention.Brush or angle brush configuration are when connecting before this, and near the axle or this axle of the forced direction of extruding force by supporting disk, the connection of this angle brush realizes that by a tension spring this is a desirable solution to driveability.In addition in the floor-cleaning device of a described type, by just can make the angle brush connect and started to the movable connecting elements imposed load that is positioned at tool face angle brush zone, this connecting elements is placed in the basic and vertically disposed rotating shaft of connection direction for this reason.This connecting elements for example can be a device lobe in the angular region in front, and it is placed on the housing of device can produce deflection.When mobile device was run into a piece of furniture or analog, this connecting elements just was subjected to effect to begin to move and so trigger the connection angle and brush around rotating shaft.More favourable herein way is that the angle brush is placed in the zone of this connecting elements.Can consider, the connecting elements of a basin shape and angle of setting brush within it are set.Be tool face angle brush to be connected do further design in addition, make an end of tension spring be securely fixed on the connecting elements and the other end acts on the connecting rod between driven pulley and the angle brush.Done the time spent at connecting elements and for example in mobile, run into a floor pin bar, when piece of furniture or analog, this connecting elements is just around its rotating shaft revolution and therefore thereupon by tension spring the connecting rod between driven pulley and the angle brush is pulled on the on-position.Favourable herein mode is this connecting rod to be arranged to equally rotating, and wherein, rotational motion makes driven pulley do gyration towards the supporting disk direction.For this reason in a favourable flexible program, make tension spring when the angle brush switches on and off all pretension on connecting rod.By this measure, avoid skidding and wearing and tearing thereby can make driven pulley that the squeezing action power of supporting disk is given limiting earlier.Always give earlier from the extruding force between runner and the supporting disk and to determine on minimum of a value.And maximum extruding force is to determine by selected spring performance.This structure is to do the optimum optimization design like this, and promptly pre-tensioning tension spring places a tensioner.This tensioner that has pre-tensioning tension spring is placed on the movable connecting elements, and this spring action is on the connecting rod between driven pulley and the brush.A more favourable way is one of spring to be connected the end be designed to stretch out from tensioner for this reason.This connection end can so be connected on the connecting rod, and promptly connecting rod has a pin, and described pin is caught in the connection end of this tension spring.In order to ensure interference-free when connecting elements turns round, tensioner is placed on the connecting elements, make it to carry out gyration thereupon.In the floor-cleaning device described in favourable design of technical solution of the present invention, this device has a peripheral suction chamber sealing strip in edge, and for example it is version of brush row, this brush row forms a dust suction enclosed cavity by distolateral resting on the ground, the bottom side pump orifice that corresponds respectively to this device is provided with communication port in sealing strip, its groove by a certain altitude in sealing strip constitutes, and a part that is equivalent to the sealing strip height is half of sealing strip height for example.On ground of cleaning, during for example a kind of parquet floor, particulate fraction is disposed and aspirated away by one or more brush dishes.These particles can be the foreign material particles, but also can be particle or the analogs that falls down from floor wax.The particle that will outwards quicken in order to be subjected to centrifugal action is intercepted and captured, this device is provided with a suction chamber sealing strip along periphery, for example be brush row's version, constitute a closed vacuum chamber of floor-cleaning device below like this by it, simultaneously, this sealing strip brush armor that will be placed on the supporting disk is lived.For improving the pumping efficiency of device, this suction chamber sealing strip is provided with communication port in the scope of device pump orifice.This device has three brush dishes that are arranged on the supporting disk triangular in shape in a preferred construction scheme, and simultaneously, two brush dishes are settled in preceding edge regions side by side, and a brush dish is settled in the back edge regions of device.This device is provided with the pump orifice of two bottom sides, and they place the tapered region between a front brush dish and the back brush dish respectively.Therefore each pump orifice corresponding to device is provided with communication port in the suction chamber sealing strip.This herein configuration is so to realize, that is, the particle that falls clearly in the brush process is towards the regional movement of bottom side pump orifice, and after this, they clean out through pump orifice by the air stream that causes and strengthen by communication port.This air stream is so big, to such an extent as to outwards the particle that quickens can not be by communication port, the particle that will fall is clearly taken away and realized best mode like this.On the one hand, these particles can not outwards be jumped out, and that is to say the outside that flows to suction chamber, intercept and capture because they are sucked the chamber sealing strip.On the other hand, this pumping power just in time is improved in those residing zones of particle that falls clearly.The structure configuration of the suction chamber sealing strip of this brush row shape has special advantage, because double function provided herein.This brush row has avoided particle to discharge from suction chamber on the one hand, and therefore provides a uniform air wake flow on the other hand, and simultaneously, the speed of this air wake flow is significantly less than the air velocity in sealing strip communication port zone.The latter is that communication port can so constitute by plain mode, and promptly sealing strip is provided with groove, and they begin to extend to half height of about sealing strip from ground.In the embodiment of sealing strip for brush row's shape, this brush herein in the zone of communication port the simplest mode be the structure of cutting short.In a preferred embodiment, the width of communication port is greatly in 2/3 to 4/3 scope of sealing strip.Zui Jia liquidity ratio just can be so definite then, that is, the height of communication port is greatly in 1/4 to 3/4 scope of sealing strip height.And the height relationships of sealing strip is to the height that can see from the outside.Also have such advantage at last, promptly a pump orifice corresponding to device is provided with 4 to 8 communication port in sealing strip.Like this, just taken particle best away in the simplest mode.

Elaborate the present invention below in conjunction with drawings and Examples, in the accompanying drawing:

Fig. 1 is a dust catcher view that floor-cleaning device of the present invention is housed;

Fig. 2 is a floor-cleaning device component side view of the present invention;

Fig. 3 is the device vertical view;

Fig. 4 is the floor-cleaning device bottom side perspective view;

Fig. 5 is another bottom view of device;

Fig. 6 is the view corresponding with Fig. 5, but has shed brush dish and base plate, and is wherein clear in order to represent, supporting disk also part is dismantled;

Fig. 7 is the partial enlarged drawing of a folding corner region of Fig. 6, and wherein, an angle brush is in the state of disconnection;

Fig. 8 is the another folding corner region enlarged drawing about Fig. 7;

Fig. 9 is that the service chart when connecting is brushed at the angle of Fig. 8;

Figure 10 is the stereogram of part shown in Figure 8, still, has omitted housing and connecting elements;

Figure 11 is and the corresponding diagrammatic sketch of Fig. 7, but relates to Fig. 9;

Figure 12 is the service chart of Fig. 9;

Figure 13 is the schematic diagram that the connecting elements settled in folding corner region is subjected to load condition to exert oneself to transmit, and this connector is connected the angle brush;

Figure 14 is the member exploded perspective view of angle brush drive unit.

At a kind of hand electric dust catcher 1 shown in Fig. 1.It has a housing 2, connects the bar 3 of a band edge side handle 4 above housing.Be provided with an on/off switch 5 in the transitional region between handle 4 and bar 3.Cable connector is represented with numeral 9.

This housing 2 is divided into an electric machine casing 6 and a position chamber 7 thereon, and this chamber can hold not shown air-filtering bag.Its electric motor fan is not made diagram equally separately.

Excessively to a tube connector 8, it forms the air stream connector of floor-cleaning device G to this electric machine casing 6 in the bottom side.

Floor-cleaning device G relates to a polishing or so-called brush device, and it has three supporting disks that driven jointly 10.This supporting disk 10 is done to sink to extending and is positioned at after the base plate 11 that can insert housing towards shell is inner.This base plate 11 has respective profile and cuts off opening 12.

Corresponding to single supporting disk 10, a cleaning assembly respectively is set, it is the version of brush dish 13 and uses the collet ways of connecting.Here relate to a convertible collet syndeton.

The driving of supporting disk 10 realizes by a motor pinion 14.For this reason, this supporting disk 10 is provided with the annular friction seat ring 15 of a rubber type outside radially.Housing 16 inside that supporting disk 10 are configured in floor-cleaning device G are so to realize, promptly a supporting disk 10 is bearing on the annular friction seat ring 15 of two other supporting disks with its annular friction seat ring 15, wherein, these two other supporting disks 10 are given motor gear 14 imposed loads diametrically with its annular friction seat ring 15.Thus, make all three supporting disks 10 realize that one is rotated uniformly by motor gear 14.

Each supporting disk 10 all is arranged on the pivoted lever 17, and lever 17 is placed on the housing pivotally by an axle 18.10 of these three supporting disks can rotating pivoted lever 17 by these and by being arranged on tension spring 19 on the housing 16 mutual extrusion or push mutually with motor gear 14, and in the long time annular friction seat ring 15 occur also can be like this under the abrasion condition.

The bulge shape housing 16 of this floor-cleaning device G has the suction channel 20 of an annular, and excessively in a flexible channel 21, this passage 21 is connected with the tube connector 8 of electric dust collector 1 by a jointing 22 its end.This annular suction channel 20 has three pump orifices 23 to 25 in the bottom side.

These supporting disks 10 are arrangements triangular in shape, and wherein two supporting disks 10 are vertically laterally settled side by side and with the main direction of motion of this floor-cleaning device, and are positioned at the front portion of floor-cleaning device G.The 3rd supporting disk 10 correspondingly is positioned in the middle of the Background Region of floor-cleaning device G.

Pump orifice

23 and 24 are placed in behind a preceding supporting disk and one in the tapered region between the supporting disk.They have the cross section of a circle.The 3rd pump orifice 25 places the front area of this floor-cleaning device G, and just being located immediately at after the housing antetheca and from this antetheca has less distance.This pump orifice 25 has the opening of a long hole shape.Corresponding joint connector of these removable base plate 11 equipments, therefore, pump orifice 23 to 25 may extend in this base plate 11.For improving pumping efficiency, this base plate 11 has abducent, fan-shaped suction inclined-

plane

26,27 in the zone of

pump orifice

23 and 24.

In two folding corner regions in front, can find out that the housing 16 of this floor-cleaning device G disconnects, can rotating connecting elements 28 so that hold, it can make angle brush B connect when being subjected to load.

Especially extremely as can be known shown in Figure 5 by Fig. 1, this floor-cleaning device G is equipped with a suction chamber sealing strip 29 that can be constituted the closed-suction chamber relatively by cleaning ground in the bottom side, and it is a brush row structure.This suction chamber sealing strip 29 is that the profile outward flange side along this floor-cleaning device G is placed on the base plate 11, and wherein, this sealing strip 29 only interrupts in the zone of the connecting elements 28 of basin shape.Like this, form on the one hand the sealing strip 30 of a U-shaped, also constitute one and the corresponding to sealing strip 31 of housing 16 front profile on the other hand, the antetheca of it and housing leaves spacing.On the main direction of motion of floor-cleaning device G,, settle another brush bar 32 in the front of this sealing strip 31.Between

brush bar

31 and 32, constituted pump orifice 25.These two

sealing strips

31 and 32 extend in the preceding edge regions of housing 16 and between the connecting elements 28 of two basin shapes.

Brush bar 32 has a rim openings groove 33 towards ground, also approximately occupies 3/4 length of brush bar 32 in the middle of it is positioned at.The height of this groove 33 is approximately with to brush half of bar 32 highly consistent.For this reason, the bristle of brush bar 32 is cut short in order to constitute this groove 33.This groove 33 at first is used for, and can cross bigger foreign material particle when floor-cleaning device G works, and they can not enter being eliminated immediately when the pump orifice 25 in the zone of brush dish 13 of rotation.So just can not cause ground to be damaged, particularly scratch ground.

In order to improve the pumping power of floor-cleaning device G, this suction chamber sealing strip 30 is provided with communication port 34 in the zone of pump orifice 23 and 24.Aggregated particles and analog when brush ground under the wearing and tearing, the brush dish effect of just being rotated is outwards quickened, stop the foreign material particle to be discharged by suction chamber sealing strip 30 so on the one hand, the foreign material particle can be taken away by

pump orifice

23 and 24 on the other hand from suction chamber.By in the zone of communication port 34, the air stream that especially strengthens in the zone of suction inclined-

plane

26 and 27 just can be taken the particle that wears away away ideally.The communication port 34 of this form also is arranged in the back edge regions of floor-cleaning device G and in brush bar 31 in front.Wherein, the width of each communication port 34 is about as much as three minutes two of visible sealing strip 29 height, and simultaneously, the height of communication port 34 is about as much as half of sealing strip 29 height.

The angle brush B that settles in floor-cleaning device G folding corner region in front can connect, so that improve the land clearing effect in floor strip, piece of furniture or analog zone.

A kind of like this angle brush B mainly is made of a plurality of bristle tuft 36 of settling on a support plate 35.With bristle tuft 36 opposed sides on settle the gear 37 on support plate 35.The axle journal 38 of in gear 37, axially settling an extruding to cooperate.This angle brush B is placed on the pivoted lever 40 by axle journal 38, and by a spring arch clasp 41 location.Pivoted lever 40 constitutes connecting rods 39, and wherein, pivoted lever 40 is mainly cylindrical and form an annular flange 42 in the zone of bearing angle brush B.Begin to extend into a lever 43 from this cylindrical part, on its free end zone, constitute another one cylinder support 44 again.At the prolongation of lever 43, and on cylinder support 44, form a radial flange 45.In the zone of lever 43, settle a pin 46 that runs through it.

In cylinder support 44, settle a driven pulley 48 by an axle journal 47, it makes axial location by a spring arch clasp 49.Thereunder driven pulley 48 has the gear 50 that the gear 37 of one and angle brush B is meshed.

By angle brush B, the parts that pivoted lever 40 and driven pulley 48 are assembled into are placed in the folding corner region of housing 16 can be rotated motion, and wherein, the collet 51 that stretches out from the top of case side is clamped the annular flange 42 of pivoted lever 40.Herein, the rotating shaft X of angle brush B has also constituted the gyroaxis of pivoted lever 40.The rotating shaft of driven pulley 48 is represented with Y, and owing to selected configuration structure, rotating shaft Y always is in identical spacing with axle X, and irrelevant with the revolution of pivoted lever 40, therefore, being connected with a joggle between the gear 37 of gear 50 and angle brush B always is guaranteed.

This connecting elements 28 is basin shape basically, and it goes from the housing profile of floor-cleaning device G is outstanding at folding corner region.This connecting elements 28 is placed in the zone of corresponding bearing 53 by the axle journal 52 of a case side.As shown in Figure 8, the rotating shaft Z of this connecting elements 28 when angle brush B is the state of disconnecting, forms about 135 ° rotation angle around the axis X of angle brush B and the axis Y of driven pulley 48.The axis Z of this connecting elements 28 is substantially perpendicular to the connection direction of angle brush B.

This connecting elements 28 has a motion arm 54, and it has a groove 55.A revolution axle journal 56 is set in this groove 55.

Insert a tensioner 57 in groove 55, it is placed on the revolution axle journal 56 by the bearing 58 of a correspondence.The axial location of tensioner 57 realizes that by collet 59 this chuck 59 snaps in the corresponding recesses of motion arm 54.This groove is through designing the gyration of the tensioner 57 in the zone that can guarantee at groove 55, and simultaneously, this gyration will be subjected to the restriction of the sidewall of groove 55.

These tensioner 57 built-in tension springs 60 of straining in advance, this tension spring at one end has an annular end 61, and it is on the bearing 58 of tensioner 57.The other end at tension spring stretches out a link 62, and it extends beyond tensioner 57.In addition, tensioner 57 has corresponding grooves.

The connecting elements 28 that is placed in the housing 16 of floor-cleaning device G is holding the parts of being made up of angle brush B, pivoted lever 40 and driven pulley 48 in its basin shape contour area.In addition, the pin 46 of pivoted lever 40 is caught in the connection end of the tension spring 60 that stretches out from tensioner 57.

Connecting elements 28 as shown in Figure 8, remains on off-state by another tension spring 63, and these spring 63 1 ends are fixed on case side, and the other end catches on the motion arm 54 of connecting elements 28.

But the turning quality of this connecting elements 28 is limited by locating part.

When running into a floor strip, piece of furniture or analog in connecting elements 28 moves, this connecting elements 28 is just around its axis Z revolution, and therefore, the tension spring 60 that is arranged on the tensioner 57 on the motion arm 54 just makes pivoted lever 40 move around axis X.In case driven pulley 48 moves on the annular friction seat ring 15 of the supporting disk 10 of angle brush B configuration the time, then the rotational motion of supporting disk 10 just is delivered on the brush B of angle by driven pulley 48 and gear syndeton, and like this, B is brushed also just along with rotation in this angle.If from now on, this floor-cleaning device G also continues towards the obstacle motion, then connecting elements 28 will continue the revolution around axis Z.The unnecessary active force of the Chan Shenging tension spring 60 that almost completely given first tensioning bears (with reference to Figure 12) herein, and described unnecessary active force can not act on the supporting disk system.

Leave and when continuing to move from bar at floor-cleaning device G, connecting elements 28 is returned to the reference position by spring 63, at this moment, tension spring 60 is loose following in tensioner 57, and pivoted lever 40 is returned on the initial position around axis X by tensioner 57.

Depict in sketch 13 when connecting elements 28 is subjected to load, how active force acts on the supporting disk system.State diagram when herein, chain-dotted line is represented to be subjected to load.Connecting elements 28 is subjected to load, causes driven pulley 48 is expressed on the annular friction seat ring 15 of supporting disk 10 thereupon, and the extruding force action direction that produce this moment passes through the axle 18 of pivoted lever 17 in the best way.This extruding force is represented with F.But, this force direction also can off-axis 18 some.But this maximum deviation should be approximately 1/8 of supporting disk 10 diameters.This departs from Figure 13 and represents with A.Thus, produce a zone of cultrating of being set out by extruding point P, the forced direction of extruding force F is arranged in this zone.

The position of the pivoted lever 17 of fixed bearing dish 10 is so selected, promptly active force according to torque to be passed in this system.Pivoted lever axle 18 is so to be provided with, and promptly these are positioned on the outer line of force that is imported by gear train assembly, perhaps apart from line of force more nearby.So just can guarantee, when connecting angle brush system, can not change between supporting disk 10 and the motor pinion 14 or in the squeezing action power between two supporting disks 10.Therefore, just prevented to skid or the wearing and tearing of the annular friction seat ring 15 of supporting disk 10 strengthen.

Disclosed feature of the present invention in explanation in front, accompanying drawing and claims, not only can be individually and also available any compound mode significant to realizing the present invention.All disclosed features all have the invention essential meaning.Therefore, the disclosure of affiliated/additional priority data (at the copy of first to file) is all enrolled in the application's the disclosure fully.

Claims

1. The ground cleaning device (G), comprising: a driven cleaning assembly such as a broom plate (13) placed on the support plate (10), a separate front brush or corner brush (B) that can be triggered to connect ), a transmission mechanism that makes the corner brush (B) work after turning on the rotating support disc (10), and at the same time, the support disc (10) is placed in a device housing (16) by means of a support shaft (18) above, characterized in that, with the corner brush (B) switched on, the force of the pressing force (F) between the driven wheel (48) acting on the corner brush (B) and the support disc (10) acts The direction passes through the axis (18) or near the axis (18).

2. The device according to claim 1, characterized in that the maximum deviation (A) of the acting resultant force (F) with respect to the axis (18) of the support disc (10) is approximately 1/8 of the diameter of the support disc (10) .

3. The device as claimed in claim 1 or 2, characterized in that the corner brush (B) is switched on via a tension spring (60) acting on the driven wheel (40).

4. The device according to any one of the preceding claims, characterized in that by applying a load to a movable connecting member (28) in the region of the corner brush (B) of the device (G), the corner brush (B) is Switching can be activated and the connecting member ( 28 ) is arranged on an axis of rotation (Z) that is substantially perpendicular to the switching direction.

5. The device according to any one of the above claims, characterized in that: one end of the tension spring (60) is firmly fixed on the connecting member (28); the other end acts on the driven wheel (48) and the corner brush (B) On a connecting rod (39) between.

6. The device according to any one of the preceding claims, characterized in that the tension spring (60) is pre-tensioned to act on the connecting rod (39) when the corner brush (B) is both on and off.

7. The device as claimed in claim 1, characterized in that the pretensioned tension spring (60) is accommodated in a tensioning element (57).

8. Device according to any one of the preceding claims, characterized in that the connection end (62) of the tension spring (60) protrudes from the tensioning element (57).

9. The device as claimed in claim 1, characterized in that the tensioning element (57) is arranged on the connection element (28).

10. The device according to any one of the preceding claims, characterized in that the suction device has a peripheral suction chamber closure strip (29), for example in the shape of a brush row, which rests on the ground with its end sides Form a dust-suction enclosure on the top, and in any case, relative to the suction openings (23, 24) on a bottom side of the device (G), there is a corresponding flow opening (34) in the closure strip (29), which is the A groove in the closing strip (29) in the range has a height corresponding to a part of the height of the closing strip (29), for example half the height of the closing strip.

11. Device according to any one of the preceding claims, characterized in that the width of the flow opening (34) is approximately between 2/3 and 4/3 of the height of the closing strip (29).

12. Device according to any one of the preceding claims, characterized in that the height of the flow opening (34) is approximately 1/4 to 3/4 of the height of the closing strip (29).

13. The device according to any one of the preceding claims, characterized in that, corresponding to the opening (23) (24) of the device (G), 4 to 8 flow openings (34) are arranged in the closing strip (29) .