EP0462076B1 - Motorised device for cleaning large surfaces - Google Patents

Motorised device for cleaning large surfaces Download PDF

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Publication number
EP0462076B1
EP0462076B1 EP91830246A EP91830246A EP0462076B1 EP 0462076 B1 EP0462076 B1 EP 0462076B1 EP 91830246 A EP91830246 A EP 91830246A EP 91830246 A EP91830246 A EP 91830246A EP 0462076 B1 EP0462076 B1 EP 0462076B1
Authority
EP
European Patent Office
Prior art keywords
brush
arm
lever
floating
linkage
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.)
Expired - Lifetime
Application number
EP91830246A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0462076A1 (en
Inventor
Franco Sonzogni
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Electrolux Euroclean Italia SpA
Original Assignee
PULIMAT SpA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by PULIMAT SpA filed Critical PULIMAT SpA
Publication of EP0462076A1 publication Critical patent/EP0462076A1/en
Application granted granted Critical
Publication of EP0462076B1 publication Critical patent/EP0462076B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01H—STREET CLEANING; CLEANING OF PERMANENT WAYS; CLEANING BEACHES; DISPERSING OR PREVENTING FOG IN GENERAL CLEANING STREET OR RAILWAY FURNITURE OR TUNNEL WALLS
    • E01H1/00—Removing undesirable matter from roads or like surfaces, with or without moistening of the surface
    • E01H1/02—Brushing apparatus, e.g. with auxiliary instruments for mechanically loosening dirt
    • E01H1/05—Brushing apparatus, e.g. with auxiliary instruments for mechanically loosening dirt with driven brushes
    • E01H1/056—Brushing apparatus, e.g. with auxiliary instruments for mechanically loosening dirt with driven brushes having horizontal axes

Definitions

  • the present invention relates to a motorised device for cleaning large surfaces, also known as motor-broom, and in particular a self-propelled vehicle provided with two or more side brushes having almost vertical axes and with at least one cylindrical brush having an horizontal axis mounted in the back of the vehicle in a central position to collect wastes pushed towards it by the side brushes and project them towards the inside of the vehicle where they are sucked and deposited into an appropriate collecting box.
  • a motorised device for cleaning large surfaces also known as motor-broom
  • a self-propelled vehicle provided with two or more side brushes having almost vertical axes and with at least one cylindrical brush having an horizontal axis mounted in the back of the vehicle in a central position to collect wastes pushed towards it by the side brushes and project them towards the inside of the vehicle where they are sucked and deposited into an appropriate collecting box.
  • the vehicles of this are motorized by an internal-combustion engine or an electric motor, according to the type of use foreseen.
  • Said motor can provide power both for moving the vehicle and for moving the brushes, or alternatively a suitable electric motor can be envisaged for actuating the brushes.
  • DE-A-2 455 200 shows a cleaning device of the type referred to comprising a central brush with a horizontal rotary shaft mounted on a floating aim, whose movements are controlled by an hydraulic cylinder and circuit.
  • GB-A-2 126 633 relates to a road sweeping apparatus with a brush having an horizontal axis mounted on a swingable double lever controlled by rams.
  • EP-A-0 134 409 discloses a sweeper having a linkage and spring system to maintain substantially constant the pressure exherted on the road by the sweper notwithstanding its wear.
  • an object of the present invention is to overcome different inconveniences and limitations of the prior technique and in particular to provide a motorised device for cleaning large surfaces wherein the horizontal brush is movable in vertical direction and allows an almost automatic compensation of the ground bumps, said feature being obtained in a particularly simple and economical manner, with one linkage only further connecting the brush with a control lever of the positions thereof.
  • a further object of the invention is to provide a motor-broom provided with means to compensate in an easy and quick way the wear of the central brush.
  • the system should to be simple, in that obtained by using mechanical pieces (arms and levers), and nevertheless very effective.
  • the device comprises a brush 2, substantially cylindrical and with horizontal axis, rotatably mounted between two floating arms or levers 4, 5.
  • the arms 4, 5 are pivoted in a known way to the body of the machine and are rigidly connected to each other by means of a pivot 3.
  • the brush 2 is mounted, rotatable about its own axis 1, at the free ends of said floating arms in such a way to be able to move in a vertical direction in order to adapt its position to the depressions and bulges of the surface to be cleaned.
  • Figure 1 shows an embodiment wherein the brush actuating motor is an electric motor.
  • the levers (lever 5 in fig. 1) is L-shaped and comprises an arm on which said electric motor M is mounted.
  • the shaft of the motor M bears a pulley PM around which a driving belt 8 is wound and, through a pulley PS integral to the brush axis, directly transfers the movement of rotation to the brush 2, which movement results in the same direction as that of the vehicle on the surface to be cleaned.
  • the floating arms 4 and 5 are placed in front of the brush 2 considering the direction of movement and this fact, together with the direction of rotation of the brush, might lead to a crawling of same.
  • at least one of the arms is provided with means to control the working position of the brush as well as the width and frequency of the oscillations of said arm during the operation of the device.
  • said means to control the working position of the brush comprise a rigid linkage (26, 27, 33, 34, 35) which connects the floating arm 5 with an operating lever 37 which is operable by the operator; an adjusting screw 42, 43, or similar means engageable by the lever 37 to limit its downward run; and a spring or similar elastic means which engages said linkage to push the floating arm 5 and therefore the brush 2 towards the ground.
  • the means to control the width and frequency of the oscillations of brush 2 comprise a damper in engagement with the rigid linkage to control the width and, frequency of the oscillations when the brush 2 (and the arm 5) is pushed upwards.
  • the control of the width of the oscillations, or better of the translations that take place when the brush is stressed upwards, is ensured by a pivot-slot connection between two elements of said linkage, preferably between the two elements immediately upstream the arm 5.
  • the funtion of spring and damper is performed by a single element, consisting of a pneumatic spring 49 which acts on a three-armed lever 34 present in said rigid linkage.
  • the sequence of its elements is as follows: the brush 2 is rotatably mounted in 1 on an end of the horizontal portion of the arm 5, the other end of which is pivoted or articulated in 25 to the frame of the vehicle.
  • the arm 5 is pivoted in 25A to an end of a rod or rigid tie rod 26, the other end of which is fastened by means of said pivot-slot connection to a vertical lever 27, floating with respect to the frame of the vehicle thanks to a pivot 28 present on the lower end of said lever.
  • the slot 30 is provided in one head 29 integral to the rigid tie rod 26, and is slidingly engaged with a pivot 31 integral to the floating lever 27 in the vicinity of its upper end.
  • the length of the slot is approximately of 20-30 mm.
  • the floating lever 27 is articulated in 32 to a second driving rod 33, hinged to a first arm of a three-armed lever 34 pivoted in 44 to the frame of the vehicle.
  • the second arm of the lever 34 is hinged to a control rod 35 which is pivoted in 36 to the lower end of the operating lever 37 having an L-configuration and comprising an upper section 39 ending with a knob 41 to be actuated by the operator, and a shorter lower section 38.
  • the operating lever 37 is furthermore pivoted in 40 to the frame of the vehicle and its upper end is movable in an elbow guide 37A between an operative position when the brush is lowered and a rest position with lifted brush.
  • an adjusting screw 42 is provided, which is screwed in a seat or nut screw 43 integral with the frame, in a way to limit the maximum downward displacement of the lower section of the operating lever 37.
  • the third arm integral to the lever 34, as indicated by reference 45, is connected through a movable stem 50 to said pneumatic spring or gas spring 49 which is pivoted at its other end, in 51, to the frame of the vehicle.
  • the articulation of lever 34 is of the so-called shackle type, with the lever 47 rigidly fastened in 46 to the arm 45 of the lever 34 by means of a screw and with its free end pivoted in 48 to the stem of the gas spring 49.
  • the screw 46 By loosening the screw 46 and rotating the section 47, it is possible to change the length of the lever arm, and therefore to vary the load of the gas spring 49.
  • the gas spring 49 performs a double function in that it acts as a damper and moreover applies a load to the brush in such a way to provide the necessary strength to avoid the brush jumping. The use of separate damper and spring is thus avoided.
  • the brush 20 is kept raised from the ground S, and this is obtained by the operator engaging the operating lever 37 in the non operative position of the elbow guide.
  • the operating lever 37 is released and brought to said working position of the guide 37A and the linkage, which constitutes a rigid mechanically connected group, lowers.
  • the gas spring 49 continues to exert a thrust F directed according to its own axis, which determines a couple with respect to the fulcrum 44 of the rigid lever system represented by the linkage group.
  • the adjusting screw 42 is screwed and the lever 37 is released allowing the gas spring 49 to push the brush 20 against the ground, then the adjusting screw 42 is moved again until its end is in contact with the portion 38 of the lever 37.
  • the motorised device is provided with means to adjust in horizontal direction the position of the brush to compensate its wear during its useful life, keeping it at the proper distance from the front wall of the brush box.
  • the free end of the floating lever is preferably mounted on an arm 11, turnable around the fulcrum 10 to position at least in horizontal direction the brush 2 with respect to the frame of the vehicle.
  • the position of the free end 25 of the arm 11, where the floating lever 5 is pivoted, can be controlled in any known way, for instance by means of a cam.
  • said position is controlled by an arm 11 pivoted in 10 and kept in position by a locking System 12.
  • the lever 11 pivoted in 10 moves according to a circumference arc displacing the end 25 ahead and downwards, carrying the worn brush to gently rest on the front wall of the brush box and simultaneously on the ground, as indicated by dashed lines in figure 4.
  • lever 11 The movement of lever 11 is caused by the weight of the elements hanging thereto (namely the brush 2 and the arm 5) and can be possibly helped by an elastic member (not shown).

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Vehicle Cleaning, Maintenance, Repair, Refitting, And Outriggers (AREA)
  • Cleaning In General (AREA)
  • Cleaning Of Streets, Tracks, Or Beaches (AREA)
EP91830246A 1990-06-13 1991-06-07 Motorised device for cleaning large surfaces Expired - Lifetime EP0462076B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT02062890A IT1248733B (it) 1990-06-13 1990-06-13 Dispositivo motorizzato per la pulizia di grandi superfici
IT2062890 1990-06-13

Publications (2)

Publication Number Publication Date
EP0462076A1 EP0462076A1 (en) 1991-12-18
EP0462076B1 true EP0462076B1 (en) 1994-12-07

Family

ID=11169768

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91830246A Expired - Lifetime EP0462076B1 (en) 1990-06-13 1991-06-07 Motorised device for cleaning large surfaces

Country Status (5)

Country Link
EP (1) EP0462076B1 (it)
AT (1) ATE115218T1 (it)
DE (1) DE69105636T2 (it)
ES (1) ES2067911T3 (it)
IT (1) IT1248733B (it)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2323269A (en) * 1997-03-18 1998-09-23 Applied Sweepers Ltd Pedestrian operated suction sweeping machine
US10947685B1 (en) * 2020-09-10 2021-03-16 Jay Hirshberg Object-gathering apparatus

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1369106A (en) * 1917-01-27 1921-02-22 Motorcycle Sweeper Company Street-sweeper
DE704922C (de) * 1937-01-28 1941-04-10 Streicher Eisen U Stahlgiesser Strassenkehrmaschine
DE2455200A1 (de) * 1974-11-21 1976-05-26 Kibo Kommunalmasch Gmbh & Co Regelungsanordnung
GB2126633B (en) * 1979-11-17 1984-11-07 Hestair Eagle Ltd Road sweeping apparatus
US4525888A (en) * 1983-09-09 1985-07-02 Fmc Corporation Maintaining constant pick-up broom pattern
FR2627787B3 (fr) * 1988-02-26 1990-08-17 Roussel Henri Pierre Balayeuse-nettoyeuse de sols a conducteur accompagnant

Also Published As

Publication number Publication date
ATE115218T1 (de) 1994-12-15
IT9020628A1 (it) 1991-12-13
IT9020628A0 (it) 1990-06-13
ES2067911T3 (es) 1995-04-01
DE69105636T2 (de) 1995-04-06
DE69105636D1 (de) 1995-01-19
IT1248733B (it) 1995-01-26
EP0462076A1 (en) 1991-12-18

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