CN1248153A

CN1248153A - System for adjusting brush pressure

Info

Publication number: CN1248153A
Application number: CN98802688.0A
Authority: CN
Inventors: 威廉·安东尼·布里斯科
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-02-20
Filing date: 1998-02-17
Publication date: 2000-03-22
Also published as: WO1998036675A1; ES2209111T3; ATE247416T1; DK1009274T3; DE69817371D1; NO993907L; GB9703555D0; NO993907D0; EP1009274B1; EP1009274A1; JP2001511688A; AU737103B2; AU6224598A; DE69817371T2

Abstract

The invention provides for a brush pressure control system for a cleaning, sweeping or scrubbing machine comprising a machine frame (30) supporting a brush head arrangement (8, 27), an actuator arrangement (1, 10) for raising and lowering the brush head (27) is mounted between the frame (30) and the brush head (27), and resilient means operatively connected to the brush head and arranged to at least partially counterbalance the force exerted on the brush head (27) by the actuator (1, 10) when lowering the brush head (27).

Description

System for adjusting brush pressure

The present invention relates to the brush pressure system of a kind of cleaning or scavenging machine, the ground space of particularly a kind of cleaning or sweeper commercial location is as ground, supermarket or the cleaning of railway station or airport megaron or the brush pressure system of scavenging machine.

Such machine can be so-called walking manipulator, promptly by walking operator control, or interchangeable be the saddle ride type machine.

These machines comprise the rotary brush head, and usually the operator can not select be applied to ground pressure by brush head: this pressure by make or during maintenance the geometry according to machine be provided with.The applicant has invented a kind of control system of such machine recently, has also invented a kind of air supported head system that is used for this type of machine, and these have all been described in the document of publication number WO95/13737, and its main contents are introduced as a reference at this.

The applicant has done remarkable improvement to control system again now, this improvement is more effectively worked control system, be equivalent to about the brush head own wt and all the more so in the following low-pressure scope especially at pressure, the applicant has also proposed a kind of effective, high performance suspension, and it can be used in a very wide pressure limit for the air supported head system.

Especially, from the zero pressure scope until with pressure limit that the independent applied pressure of brush head weight equates in can easily realize accurately and reliably controlling the brush head applied pressure.

The present invention proposes the system for adjusting brush pressure that a kind of cleaning, cleaning or swaging machine are used, this system comprises that the machine frame, one of a supporting brush head device are installed between framework and the brush head and are used to promote and the drive assembly of the brush head that descends; And elastic device, this elastic device can be connected with brush head with moving, and is arranged to offset at least in part when driver decline brush head by driver and is applied to power on the brush head.

Particularly, elastic device is arranged to the power that balance driver at least in part applies.

The advantage of elastic device is accurately to control the power that applies by the brush head device in respect to the pressure limit of brush head installation weight from zero.

The elastic energy of elastic device changes easily selectively.

Elastic device preferably includes a cylinder body and piston apparatus.

Elastic device preferably includes a gas strut device.

Alternately or in addition, according to a special preferred embodiment of the present invention, elastic device can comprise at least one spring assembly, this spring assembly can be connected between framework and the brush head device by cable arrangement with moving.Spring assembly can comprise a helical spring such as compression spring or extension spring, and spring can be installed in the helical spring pipe.

Drive assembly preferably includes driver spring assembly and the tensioning apparatus that has been mounted to the suspension arrangement effect, this driver spring assembly comprises presses to the biasing device that needs the clean surface with the brush head device, this tensioning apparatus is used for the tightening drive spring assembly so that set the pressure of brush head device, and the driver spring assembly can be regulated in a successive range so that desired bias voltage of pressing to the surface to be provided selectively by tensioning apparatus.

In addition, this system can be included in to work between framework and the brush head device and press to the bias voltage selected that needs the clean surface and be mounted to the biasing device that plays the suspension arrangement effect between framework and brush head assembly brush assembly is applied one; The device of the operating pressure that monitoring and/or measurement apply; The device that shows measured operating pressure index; The operator imports the device of desired brush assembly operating pressure; Be used for compare operation person's input pressure and by measuring pressure, and as requested pressure with by the comparator device of a control signal of the difference between measuring pressure generation; And the device that applies control signal to pressure applying means.

System preferably also comprises measurement mechanism that is used to measure the brush wearing and tearing that are bearing on the brush head and the display unit that shows tested wearing and tearing on operator's console.

Preferably also be arranged on load cell that writes down when brush head applied normal pressure and the device that when load cell writes down this normal pressure, is used to suspend driver.

Be preferably between framework and the brush head link mechanism is set, suitably and flatly locate to keep brush head, this link mechanism can be the parallelogram link mechanism.

Also provide a kind of wearing and tearing of the brush that is used to measure brush head and the device that on operator's console, shows wearing and tearing according to preferred embodiment.Such device can comprise potentiometer, the amount of movement of this potentiometer record equalizer bar when driver lifting or decline brush head.Potentiometer is recorded as resistance variations with this change, and this is relevant with the brush wearing and tearing.Usually brush bristle length in new is 2 inches (4.8 centimetres), even and can wear up in bristle length and work effectively when only being 1/2 inch (1.2 centimetres).

Preferred embodiment also provides a kind of control circuit, arranges that this control circuit is during for the normal pressure on load cell record brush head, promptly when the brush kiss the earth, and the momentary pause driver.This circuit is measured potentiometric position at this interval, and with this position and the storage previous measured value in the line and/or the predetermined value of new brush, promptly calibration value compares.Electronic component such as microprocessor adopts this information to calculate the relative wear of brush then, and at the display of machine control panel, as showing this information on the light-emitting diode display, it can be shown as the brush wear tables percentage number of bristle original length or be expressed as the percentage number of bristle residue length, or indicate the calculated value of a real residue length of corresponding bristle, or only provide simply one high, in or low index.When low-down value, pointer can be glimmered.

These measurements and calculations can start in the periodic intervals of machine between the operating period, maybe can be set in to have only when brush to carry out when raised position descends.

In order to understand the present invention better and to represent how the present invention implements, now with reference to the accompanying drawings example is described, wherein:

Fig. 1 is the cross section front view of the brush assembly of cleaning and scavenging machine;

Fig. 2 comprises that the applicant had before invented the cleaning of brush pressure assembly of proposition and the perspective view of scavenging machine;

Fig. 3 is the control schematic diagram to installing among Fig. 1 and Fig. 2;

Fig. 4 is the side view of brush pressure assembly among Fig. 1, and it has shown control system of the present invention;

Fig. 5 is the side view of the brush pressure assembly of another embodiment of the present invention proposition;

Fig. 6 is the present invention's side view of the brush pressure assembly of another embodiment proposition again; And

Fig. 7 is the side view of the brush pressure assembly of yet another embodiment of the invention proposition.

Among Fig. 1, brush assembly comprises two bourdon tubes 1 that include spring 2.Scheming right-hand pipe 1 represents to show spring 2 with profile type.One end of every spring is fixed to the upper end 3 of pipe, and the other end is fixed on the spring lever 4, and this spring lever 4 enters respective springs pipe 1 by hole 5 slippages.Spring lever 4 is linked together by bolt 6, and is fixed in brush support plate 8 by assembly 7, and brush head 27 is connected on the brush support plate 8.

Prevent to manage 1 rotation or inclination by a fixed head 9.Driver 10 is fixed on the dividing plate of scavenging machine.Driver 10 drives drive rod 12, and it is in the position of basic closure among the figure, and drive rod 12 is fixed on the drive plate 14 by pin 13, and drive plate 14 is clamped on two bourdon tubes 1 by fishbolt 15.When driver drives drive rod 12 downwards the time, bourdon tube 1 moves down and makes spring 2 pressurizeds, causes that the pressure that is applied on the brush head increases, but still provides suspension for adapting to the wearing and tearing of irregular ground and brush like this.Usually, the effective spring length degree is about 15 inches under the not subjected to pressure state, and such spring length is specially adapted to 26/32 inch brush pressure system.Compare with using the available pressure that is 200 pounds to the maximum of known devices, this equipment can provide 0 to 450 pound pressure in the legged scavenging machine of the loading that apparatus of the present invention are housed.Certainly also can use the biasing device of other form.The advantage of disc spring is that the vertical space that takies in scavenging machine is less.And the spring rate of disc spring is low usually, and this is particularly suitable for this purpose.Also can use gas strut or hydraulic pressure or pneumatic system.

Can also further regulate pressure by the length or the intensity that change spring, the clamped position of bourdon tube also can change.But these changes require the Maintenance Engineer to carry out.

Because driver can stop on arbitrary position of its stroke, thereby this system especially can be regulated.

Usually brush support plate 8 is mounted on a pair of circle or the oval-shaped brush, and brush rotates in the plane on almost parallel ground (the maybe surface that need clean or clean or clean).But, in some scavenging machine, can use nearly four brushes, and device of the present invention can be used for controlling together this four brushes, or controls (in this case to each brush need with independent driver) in addition individually.Certainly, the cylindrical brush head that is installed on the brush support plate 8 is convenient to control equally, or by corresponding independent assembly shown in Figure 1 its each end is controlled in addition.

Among Fig. 2, the brush assembly of Fig. 1 is installed on the legged clearing apparatus.Identical parts represents that with same numeral a pair of bourdon tube 1 is connected on the drive rod 12 by drive plate 14.Driver 10 is fixed on the device frame 16 by pull bar 15.The second pivot rotation seat 17 is connected to framework 16 with assembly 7 and brush support plate 8.Brush is originally not shown in Fig. 2, protects after the flange 17 but be installed under the support plate 8 and be positioned at, and is driven by ecouvillon motor 18 (having showed wherein motor among Fig. 2).

Fig. 2 has also showed the relative position of water tank 19 and battery pack 20, and battery pack 20 is used to drive the horizontal driver of ecouvillon motor 18 together with clearing apparatus.Laterally the direction of driver is controlled by handgrip 21.Squeegee 22 has the swabbing action that produces by vacuum motor 23.

In addition, be provided with brush head pressure control panel 24 within sweep of the eye the operator.

Schematically showed the side view of brush assembly among Fig. 3, control system then shows with block diagram.

Brush head 27 needs the position of cleaning floor by electronic or hydraulic unit driver 10 controls relatively, and it promotes or the decline brush head by the drive rod of the spring in the compression bourdon tube 1.Other elastic device such as gas strut can be used for brush head is applied the pressure of pressing to ground, and certainly, other also can be used for controlling the position of brush head such as hydraulic pressure or pneumatic means.

Pressure sensor is positioned at driver 10.In the use, this sensor monitoring brush puts on the pressure on ground and produces signal 25.Pressure sensor can comprise the deformeter or a piezoelectric transducer or the position sensor that are installed on the drive plate 14 shown in Figure 1.In addition, fixing pin 11 (see figure 1)s that assembly are connected to device frame can be used as the shearing force meter with gaging pressure.Amplifier 26 converts this pressure signal 25 in follow-up circuit applicable value.

Control panel 24 is arranged in operator's the visual field.It has pressure and selects button 28, and the operator can be by selecting specified pressure of button 28 preliminary elections.Rocker switch 29 promotes or decline brush head 27 according to relative ground, the position of the switch.Digital display 24 ' shows brush head 27 pressure on the ground that pressure sensor records.

Processor 26 ' compares pressure signal and the selected pressure of operator that records, and control signal of corresponding generation makes the pressure that records identical with selected pressure substantially with control (if necessary) driver 10.

Processor 26 ' can be that perhaps it can comprise the standard C PU assembly of a chip form such as the simple structure of list that comprises an electronics comparator and amplifier circuit.

Power to electronic component by battery on the scavenging machine 20 or other low battery power source.

Fig. 4 shows the brush head that the planet brush that floor surface is cleaned, cleans, polished or cleans is installed, and it is mounted on the machine frame 30 by driver 10 (one arm of only having showed it), specifically is mounted on the driver bearing support.

Brush head is as shown in arrow 31 to be promoted or decline by the leading screw jack that is installed on the driver 10.

The motor of driven brush is installed on the brush head, but does not show to show in Fig. 4.Be other part of exhibiting device more clearly, the machine water tank that is installed on framework or the chassis is also not shown in Fig. 4.

Equalizer bar 32 is mounted to an end of pivot suspension 34 by gantry post 33, and the other end of supporting 34 is connected on the framework.Beam 32 also is connected with drive arm 1, and is that the bascule of gas strut 35,37 is connected with balance brush head weight the opposite side of gantry post 33 and shape.The opposite end of beam 32 connects adjuster 36 by thread and is connected with brush head, and thread connection adjuster 36 is used for the brush adjustment to different length, for example to prevent that the relative ground of brush from compressing.

The potentiometer that is used to measure the brush wearing and tearing is connected between equalizer bar 32 and the pivot suspension 34.

Another supporting of brush head is provided by the parallelogram connection-rod between the side of brush head and main frame 38, to keep brush plate location.

Show the driving wheel 39 of scavenging machine, usually on the chassis or the every nook and cranny of framework such driving wheel is set.

The moving line of counterweight is represented by arrow A, is represented by lower line when brush rises, and is represented by upper lines when brush descends.When brush was reduced to ground by driver 10, equalizer bar 32 rotated around gantry post 33, is used for Compressed Gas leg unit 35,37.The extension that brush head 8 is driven device 1 falls earthward.But, when brush head 8 convergence ground, act on ground pressure preferably by gas strut device 35,37 balance in addition by brush head 8.This balanced action realizes that by Compressed Gas leg unit 35,37 gas strut device 35,37 has a volume that is sealed in the chamber 35, thereby preferably with the mobile degree of the slip of elastic type limited piston member 37 in chamber 35.Like this, relative motion between piston component 37 and the chamber 35 preferably is able to apply on brush head 8 can exactly determined low-pressure, because the restriction of gas strut device 35,37, thereby its balanced action just can be used for reducing effectively the pressure that acts on ground by driver 1 and brush head 8.

After driver 1 the power on the brush head 8 of acting on is removed, be that driver 1 withdrawal is to promote brush head 8, compression pressure in the chamber 35 is removed, gas strut device 35,37 elongation, and the fluid volume of the input cavity 35 gas strut device 35,37 that makes elongation of hanking can easily be bearing in brush head 8 on this raised position.

What should see is, pass through the equilibrant force effect that play, the weight of 35,37 pairs of brush head 8 of gas strut device provides supporting, and make driver 1 act on ground clean power accurately to be controlled, be controlled at zero pressure specifically to the pressure limit that is equivalent to brush head device 8 weight by brush head 8.

The change of equalizer bar 32 positions causes the corresponding change of potentiometer slide position, thereby causes that measured resistance changes.Load cell (not expression among Fig. 4) is surveyed the position of brush kiss the earth, also promptly register a normal pressure, and the momentary pause driver is so that carry out potentiometer measurement at this record position.Driver continuation driven brush head descends earthward then, up to the pressure that requires that reaches on the ground.

Bascule 35,37 is offset the weight of brush head, and selected very low brush pressure limit, this scope to be significantly less than to reach up to now, as be lower than 100 pounds/inch ²This scope is used for exquisite cleaning or polishes or be used to clean frangible or special floor surface.

Fig. 5 is the side view of another embodiment of the present invention, and wherein identical with Fig. 4 part is represented with same numeral.

The method of operation of bascule shown in Figure 5 is to shown in Figure 4 similar, that is, when brush head 8 descended earthward by driver 1, gas strut device 35a, 37a were compressed.

Can see by Fig. 5, this device comprises a parallelogram arrangement 38a who is shorter than the parallelogram arrangement among Fig. 4, and gas strut device 35a, 37a can be connected between the frame part and brush head 8 of cleaning/cleaner by the joint of the lower supporting rod of itself and parallelogram arrangement 38a with moving.As will be seen, when brush head 8 moves down the floor surface that contact need clean or clean, the clockwise pivot of parallelogram arrangement 38a rotates, and so that piston component 37a is moved among the chamber 35a of gas strut device, this relative motion is resisted gradually by the pressure that forms in the 35a of chamber.Identical with device shown in Figure 4, the equilibrant force that gas strut device 35a, 37a shown in Figure 5 are provided is used for providing a clean power on brush head 8, and this clean power can easily specifically be controlled at zero pressure to the pressure limit that is equivalent to brush head 8 weight.

Now turn to Fig. 6, showed another enforcement again of the present invention among the figure, wherein identical with Figure 4 and 5 part is represented with similar label.

The main difference of the embodiment of Fig. 6 embodiment and Figure 4 and 5 is that the clean power of requirement that the brush 27 of brush head device 8 is applied to ground is when gas strut device 35b, 37b stretch, rather than when pressurized, realize.Pressure in the 35b of chamber is the limited piston member 37b extending range that can stretch out thus still, and is used for the power that balance driver 1 applies.Gas strut device 35b, the 37b of embodiment can be connected the extension bracket 40 of scavenging machine framework 30 and being connected between the protuberance 41 of brush head device 8 with moving among Fig. 6.Can see as Fig. 6, when driver operation with the brush head device during towards the ground decline of need cleaning/cleaning, gas strut device 35b, 37b stretching, extension, and become effectively by the pressure that forms in the 35b of chamber and to be stretched.On the contrary, when brush head device 8 during from raked floor, the pressure that is formed in the 35b of chamber by the previous relative motion between chamber 35b and the piston component 37b is used to help support the weight of the brush head device 8 of built on stilts.

For each embodiment that describes in the literary composition, when the brush pressure apparatus is in when static, when promptly brush head device 8 was from raked floor, the gas strut device was arranged so that preferably the pressure in its chamber can change to any particular value selectively.

Except applied compression spring assembly 42 as the elastic device, embodiments of the invention shown in Figure 7 are similar to the embodiment shown in Fig. 5 and 6.

Can see that the embodiment of Fig. 7 illustrates with reference to ground cleaning/cleaner, it also uses scaffold 30, this framework 30 have a suspension, be used for promoting or the driver 10 of decline brush head device 27 by a pair of bourdon tube 1.

Ground cleaning/cleaner is arranged to move on need cleaning/clean Surface by a plurality of wheels 39.

Embodiment shown in Figure 4 and 5, parallelogram jockey 38c is used for brush head device 27 is connected to the scaffold 30 of cleaning/cleaner.Elastic device can be connected scaffold 30 with moving and the installation bracket 46 that stretches upwards from brush head device 27 between.

Installing plate 40c hangs downwards from scaffold 30.The lower area of installing plate 40c has the protuberance of horizontal stretching, and a hole is arranged on it, regulates bolt 44 and passes this hole.This adjusting bolt 44 stretches into an end of cylinder body 43 simultaneously, and this cylinder body 43 is being laid axle/piston 45,47 devices that are installed on slippingly wherein.Axle 45 stretches out from the cylinder body other end relative with adjusting bolt 44 1 ends are installed.Regulate bolt 44 and not only be used for installing plate 40c is connected in cylinder body 43, also be used to regulate the interval between installing plate 40c and the cylinder body 43, thereby the tension force that produces in the elastic component is regulated.

In this embodiment, as shown in Figure 7, elastic component comprises that one is installed in the cylinder body 43 and is positioned at compression spring 48 under the piston 47, thereby when piston 47 moves down in cylinder body 43, is used to compress spring 48.

The lower end of axle 45 is fixed on the installation bracket 46, and this carriage 46 extends upwardly to parallelogram link rod 38c from brush support plate 8.

Thereby compression spring 48 is used to resist piston 47 and moves downward, and by it by being connected of axle 45 and installation bracket 46 and brush support plate 8, piston 47 move downward moving downward corresponding to brush head device 27.

Consider the embodiment of above-mentioned discussion, therefore can see, the power that compression spring 48 can apply along a direction balance driver easily, thus realize that brush head device 27 moves under the low pressure that requires.

For all embodiment of the present invention, the reading on the potentiometer when comparing the brush kiss the earth can be measured the wear extent on the brush, thereby can be in order to show the situation of this wearing and tearing on the display floater of operator's console.

This example is among the many possibilities of the present invention embodiment certainly.The personnel of present technique are readily understood that, this system applies in dissimilar cleanings, clean, polish and swaging machine, and can not only be used for the machine that to exert pressure downwards, can also be used for upwards and the machine of exerting pressure to the side through suitable modification, these modifications belong within those skilled in the art's the non-invention limit of power.

Should see that bascule of the present invention can be provided by any one suitable structure, this structure has suitable elasticity and suitable equilibrant force is provided, and these requirements are easy to realize by the spring assembly of any appropriate format, intensity and number.

In addition, be easy to propose some examples like this, wherein can be used for the gas strut shown in alternate figures 4,5 and 6 (35,35a, 35b) such as the spring (48) of Fig. 7 and the spring assembly of managing (43).

Claims

1. the system for adjusting brush pressure of a cleaning, cleaning or swaging machine, the machine frame (30), one that it comprises a supporting brush head (27) device be used for promoting and decline brush head (27) and be installed in framework (30) and brush head (27) between drive assembly (10) and elastic device (35,35a, 35b, 42), this elastic device (35,35a, 35b, 42) can be connected with brush head (27) with moving, and is mounted in decline brush head (27) and is applied to power on the brush head (27) up to small part ground balance driver (10).

2. the control system of claim 1 is characterized in that, the elasticity of elastic device (35,35a, 35b, 42) can change selectively.

3. as the control system of claim 1 or 2, it is characterized in that elastic device (35,35a, 35b, 42) comprises at least two relatively-movable members, and is mounted to and can relatively moves with elastic type.

4. control system as claimed in claim 3 is characterized in that one of movable member can slippage in by the cavity segment that another movable member constituted.

5. as claim 1,2,3 or 4 control system, it is characterized in that elastic device comprises spring assembly (48).

6. control system as claimed in claim 5 is characterized in that, spring assembly (48) comprises a helical spring.

7. control system as claimed in claim 6 is characterized in that, spring assembly (48) comprises a compression spring.

8. as claim 5,6 or 7 control system, it is characterized in that spring assembly is mounted to along a line that is parallel to the longitudinal axis of drive assembly (10) and works.

9. control system as claimed in claim 8 is characterized in that, elasticity is because the pressure that produces in the chamber causes.

10. control system as claimed in claim 9 is characterized in that force value can be determined selectively.

11. the control system as claim 9 or 10 is characterized in that, pressure is to obtain by the fluid of importing predetermined in the chamber.

12. as claim 9,10 or 11 control system, it is characterized in that, in the chamber, provide gas, and elastic device comprise a gas strut device.

13. the control system of arbitrary claim in the claim is characterized in that as described above, elastic device comprises a cylinder body and piston apparatus.

14. the control system as arbitrary claim in the claim 4 to 13 is characterized in that, elastic device is mounted to when the brush head device descends and is compressed.

15. the control system as arbitrary claim in the claim 4 to 13 is characterized in that, elastic device is mounted to when the brush head device descends and is stretched.

16. the control system of arbitrary claim in the claim is characterized in that as described above, elastic device can be connected between framework and the brush head device with moving.

17. the control system of arbitrary claim in the claim as described above, it is levied and is, elastic device is positioned near the drive assembly and with drive assembly and matches.

18. the control system of arbitrary claim in the claim is characterized in that as described above, elastic device can be connected between framework and one and the movable member that the brush head device links to each other with moving.

19. the control system as claim 18 is characterized in that, movable member comprises a parallelogram link rod that is connected with the brush head device.

20. control system as claimed in claim 5, it is levied and is, spring assembly (48) can be connected between framework and the brush head device by cable arrangement with moving.

21. the control system as claim 20 is characterized in that, spring assembly (48) comprises that twines a sheet spring.

22. the control system as claim 21 is characterized in that, the sheet spring links to each other with a housing on being installed in framework.

23. the control system of arbitrary claim in the claim as described above, it is characterized in that, drive assembly comprises driver spring assembly (2) and the tensioning apparatus (12 that has been mounted to the suspension arrangement effect, 13), this driver spring assembly (2) comprises presses to the biasing device that needs the clean surface with brush head (27) device, this tensioning apparatus (12,13) be used for tightening drive spring assembly (2) so that set the pressure of brush head device, driver spring assembly (2) can be regulated in a successive range so that desired bias voltage of pressing to the surface to be provided selectively by tensioning apparatus.

24. the control system as claim 23 is characterized in that, tensioning apparatus comprises the device of control spring device tensioning, to change the bias voltage of brush head device.

25. the control system as claim 24 is characterized in that, drive assembly is mounted to the compressed drive spring assembly.

26. control system as arbitrary claim among the claim 1-22, it is characterized in that this control system is included in to work between framework and the brush head device and presses to the bias voltage selected that needs the clean surface and be mounted to the biasing device that plays the suspension arrangement effect between framework and brush head device the brush head device is applied one; The device of the operating pressure that monitoring and/or measurement apply; The device that shows measured operating pressure index; The operator imports the device of desired brush head device operating pressure; Be used for compare operation person's input pressure and by measuring pressure, and as requested pressure with by the comparator device of a control signal of the difference between measuring pressure generation; And the device that applies control signal to pressure applying means.

27. the control system as claim 26 is characterized in that, comparator comprises an electronic processors.

28. the control system of arbitrary claim in the claim is characterized in that as described above, this control system also comprises a link mechanism, and it is so that brush head flatly is supported this mode connecting frame and brush head device substantially.

29. the control system as claim 28 is characterized in that, link mechanism is that shape is the link mechanism of parallelogram.

30. the control system as arbitrary claim in the claim is characterized in that, this control system also comprises measurement mechanism that is used to measure the brush wearing and tearing that are bearing on the brush head and the display unit that shows tested wearing and tearing on operator's console.

31. the control system as claim 30 is characterized in that measurement mechanism comprises potentiometer, is used for detecting when driver lifting or decline brush head device the amount of movement of equalizer bar.

32. the control system of arbitrary claim in the right is characterized in that as described above, load cell that this control system writes down when also being included in brush head being applied normal pressure and the device that is used to suspend driver when load cell writes down this normal pressure.

33. the control system of arbitrary claim in the right is characterized in that as described above, this control system comprises device that calculates the relative wear on the brush and the device that shows relative wear.

34. a system for adjusting brush pressure, it is described and illustrates like that with reference to accompanying drawing 1 to 3, Fig. 4, Fig. 5 and Fig. 6 with the front substantially.