EP2453060A2 - Moyen de suspension oscillante pour la brosse d'une balayeuse - Google Patents

Moyen de suspension oscillante pour la brosse d'une balayeuse Download PDF

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Publication number
EP2453060A2
EP2453060A2 EP11186228A EP11186228A EP2453060A2 EP 2453060 A2 EP2453060 A2 EP 2453060A2 EP 11186228 A EP11186228 A EP 11186228A EP 11186228 A EP11186228 A EP 11186228A EP 2453060 A2 EP2453060 A2 EP 2453060A2
Authority
EP
European Patent Office
Prior art keywords
brush
piston
choke
cylinder group
conduit
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.)
Granted
Application number
EP11186228A
Other languages
German (de)
English (en)
Other versions
EP2453060A3 (fr
EP2453060B1 (fr
Inventor
Carlo Zoni
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.)
I L S A Srl
Original Assignee
I L S A Srl
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 I L S A Srl filed Critical I L S A Srl
Publication of EP2453060A2 publication Critical patent/EP2453060A2/fr
Publication of EP2453060A3 publication Critical patent/EP2453060A3/fr
Application granted granted Critical
Publication of EP2453060B1 publication Critical patent/EP2453060B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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 sweeping machines of a type bearing a rotary brush having an axis that is perpendicular to the advancement direction of the machine, suspended from a self-propelling frame.
  • the suspension of the brush from the self-propelling frame is achieved using an articulated frame, provided with springs or equivalent elastic suspension means, which function as a counter-weight to the weight of the frame and the weight of the brush such as to determine a correct force with which the brush presses on the plane on which it is required to act such as to remove dirt therefrom.
  • the prior art comprises fluid means, such as for example a hydraulic cylinder-piston group and a relative command group, for determining the rest configuration or work configuration of the articulated frame, and consequently such as to determine the constant force with which the frame keeps the brush pressed onto the plane to be cleaned.
  • fluid means such as for example a hydraulic cylinder-piston group and a relative command group, for determining the rest configuration or work configuration of the articulated frame, and consequently such as to determine the constant force with which the frame keeps the brush pressed onto the plane to be cleaned.
  • the articulated suspension of the brush enables it to be raised and lowered as it follows irregularities in the terrain, for example bumps.
  • the force remains substantially constant.
  • the articulated support frame of the brush is associated to hydraulic shock absorber organs which absorb the shocks of the movement and prevent too-sharp responses to the irregularities in the terrain which cause vertical movements of the brush.
  • the brush raised by the encounter with the bump, and having passed over the bump, does not immediately return to rest on the ground, but because of the shock absorber lowers slowly, thereby missing the zone just downstream of the bump, which therefore does not receive the action of the brush.
  • the invention has the aim of obviating the above-mentioned drawbacks with a solution that is simple and economical.
  • the aim is attained by a device having the characteristics set out in the independent claim.
  • the device of the invention comprises a support frame for the rotary brush, which is suspended from a cable wound on a pulley which is solidly constrained to a cylinder of a first double-acting hydraulic piston-cylinder group supplied by a pump via a first four-way distributor activated automatically or manually by the operator, the stem of the first piston-cylinder group being attached to the machine frame, and means being comprised for detecting sharp rises of the brush which it encounters and passes over a bump.
  • a single-acting second piston-cylinder group is interposed between the pulley and the first piston-cylinder group, which second group is supplied by the pump via a priority valve and a manually adjustable choke, there being provided on the conduit, downstream of the choke and flowed-through by the fluid which the choke enables passage of, a discharge conduit which is opened by a by-pass valve activated by a timer commanded by the means for detecting the sharp rises of the brush, or by the operator.
  • the figures illustrate a frame 1 bearing a rotary brush 2.
  • the frame 1 is supported by the self-propelling frame of the machine (not illustrated) by means of a chain or steel cable 3 which runs around two pulleys 31 and 32 and is connected to a fixed point 33 of the self-propelling frame.
  • the pulley 32 is associated to the stem 52 of a single-acting second piston-cylinder group 51, the cylinder 50 of which is rigidly constrained to the cylinder 5 of a double-acting first piston-cylinder group 53, the stem 54 of which is constrained to the self-propelling frame (not illustrated).
  • the hydraulic command circuit of the first and second piston-cylinder groups is as follows.
  • the hydraulic pump 6 supplies the priority valve 7, and is set in communication via the maximum pressure valve 8 with the discharge 9.
  • the maximum pressure valve 8 is calibrated such as to open at a predetermined pressure, for example 80 bar.
  • the valve 7 supplies a first four-way distributor 10 which commands the first piston-cylinder group 53 via a block valve 110.
  • the block valve 110 is in the position illustrated in the figures when the distributor 10 is in the neutral central position; the valve 110 opens when the distributor 10 slide is activated to the right or left.
  • the left chamber is supplied by the first piston-cylinder group 53, and the cylinder 5 moves to the left, causing the rising of the brush group.
  • the right chamber of the group 53 is set to discharge mode.
  • the brush With the slide of the first distributor 10 in the central position, the brush is supported at the desired height.
  • the oscillations of the brush for following the irregularities of the terrain also known as "floating" is commanded by the single-acting second piston-cylinder group 51, except for when the brush encounters a bump, especially when it is followed by a drop.
  • the frame 1 bearing the brush comprises two vertically-mobile flanks 11, singly provided with a lower skate 12.
  • the skate 12 is normally at a slightly higher position than the height of the lower part of the brush 2 contacting the terrain.
  • the stem 52 of the single-acting second piston-cylinder group 51 is made to displace to the left in the figure (rising of the brush) by the action of pressurised fluid in the right chamber, and is made to displace to the right (descent of the brush) due to the weight of the frame bearing the brush.
  • the single-acting second piston-cylinder group 51 is commanded as follows. During normal operating conditions, a certain desired pressure, determined by the maximum pressure valve 109, is maintained in the right chamber of the second piston-cylinder group 51 by means of the priority valve 7
  • the priority valve 7 is connected to the right chamber of the second piston-cylinder group by means of a conduit 101 on which a choke 102 is located, which choke is manually adjustable by means of a knob (not illustrated).
  • the excess part of fluid, which the choke 102 allows to pass, is sent to the discharge 9 through the conduit 103 and the second two-way distributor 104, which is in the position illustrated in figure 4 .
  • the part of fluid which the choke 102 allows to pass flows into the conduit 105 and, via the block valve 106, reaches the chamber of the second piston-cylinder group 51 through the conduit 108.
  • the valve 106 is normally open, contrarily to what is illustrated in figure 4 .
  • the block valve 106 blocks only with the brush raised and in the rest configuration.
  • the fluid flowing in the conduit 103 flows together with the fluid that is flowing in the conduit 105 upstream of the solenoid valve 106, which is normally open.
  • the conduit 105 is connected to the conduit 103 by the valve 107, which is normally closed as illustrated in figure 4 .
  • the second distributor 104 is commanded by the operator when the brush is to be raised, for example during a stage of transferring the machine.
  • the activation of the distributor 104 enables all the fluid in the conduit 101 to pass into the conduit 108 which opens into the chamber of the single-acting second piston-cylinder group, raising the brush.
  • the activation of the valve 107 is performed by activation of the sensor 100 which, via a timer (not illustrated) activates the distributor slide such as to enable the fluid which the choke 102 has enabled to pass to flow directly to the discharge 9 through the second distributor 104.
  • the valve 107 will herein below be referred-to as the by-pass valve 107.
  • the activation of the by-pass valve 107 causes the support given by the second piston-cylinder group to the brush to be temporarily suspended, enabling a sharp drop of the brush due to its own weight, as the floating action afforded by the second piston-cylinder group 51 is no longer present.
  • valve 110 and the distributor 10 are also subjected to receiving command signals from the sensor 100.
  • the activation of the sensor 100 causes opening of the block valve 110 as well as the leftwards displacement, as in figure 1 , of the distributor 10 slide, and in this way the fluid is supplied to the right chamber of the first piston-cylinder group 53 which thus accelerates the fall of the brush, making possible the sharp drops required in order to follow terrain irregularity.
EP11186228.0A 2010-11-10 2011-10-21 Moyen de suspension oscillante pour la brosse d'une balayeuse Active EP2453060B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITRE2010A000090A IT1402623B1 (it) 2010-11-10 2010-11-10 Mezzi di sospensione oscillante per la spazzola di una macchina spazzatrice

Publications (3)

Publication Number Publication Date
EP2453060A2 true EP2453060A2 (fr) 2012-05-16
EP2453060A3 EP2453060A3 (fr) 2016-08-31
EP2453060B1 EP2453060B1 (fr) 2017-09-20

Family

ID=43742967

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11186228.0A Active EP2453060B1 (fr) 2010-11-10 2011-10-21 Moyen de suspension oscillante pour la brosse d'une balayeuse

Country Status (2)

Country Link
EP (1) EP2453060B1 (fr)
IT (1) IT1402623B1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106836088A (zh) * 2017-02-23 2017-06-13 中铁七局集团第三工程有限公司 一种基于铁索应用开发的高架桥施工用养护装置
CN110117941A (zh) * 2019-05-17 2019-08-13 河北安旭专用汽车有限公司 清扫系统及清扫机

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4569096A (en) * 1982-09-30 1986-02-11 Fmc Corporation Sweeper with hydraulically driven components

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106836088A (zh) * 2017-02-23 2017-06-13 中铁七局集团第三工程有限公司 一种基于铁索应用开发的高架桥施工用养护装置
CN106836088B (zh) * 2017-02-23 2018-06-15 中铁七局集团第三工程有限公司 一种基于铁索应用开发的高架桥施工用养护装置
CN110117941A (zh) * 2019-05-17 2019-08-13 河北安旭专用汽车有限公司 清扫系统及清扫机
CN110117941B (zh) * 2019-05-17 2024-04-02 河北安旭专用汽车有限公司 清扫系统及清扫车辆

Also Published As

Publication number Publication date
EP2453060A3 (fr) 2016-08-31
EP2453060B1 (fr) 2017-09-20
ITRE20100090A1 (it) 2012-05-11
IT1402623B1 (it) 2013-09-13

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