EP0724668A1 - Engin de travaux publics destine au rabotage du revetement routier - Google Patents

Engin de travaux publics destine au rabotage du revetement routier

Info

Publication number
EP0724668A1
EP0724668A1 EP94929609A EP94929609A EP0724668A1 EP 0724668 A1 EP0724668 A1 EP 0724668A1 EP 94929609 A EP94929609 A EP 94929609A EP 94929609 A EP94929609 A EP 94929609A EP 0724668 A1 EP0724668 A1 EP 0724668A1
Authority
EP
European Patent Office
Prior art keywords
wheels
drum
cutting
steerable
wheel
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.)
Ceased
Application number
EP94929609A
Other languages
German (de)
English (en)
Inventor
William George Lupton
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.)
ROTA-PIC Ltd
Original Assignee
ROTA-PIC Ltd
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
Priority claimed from GB939321457A external-priority patent/GB9321457D0/en
Priority claimed from GB939326460A external-priority patent/GB9326460D0/en
Application filed by ROTA-PIC Ltd filed Critical ROTA-PIC Ltd
Publication of EP0724668A1 publication Critical patent/EP0724668A1/fr
Ceased legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C23/00—Auxiliary devices or arrangements for constructing, repairing, reconditioning, or taking-up road or like surfaces
    • E01C23/06—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road
    • E01C23/08—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road for roughening or patterning; for removing the surface down to a predetermined depth high spots or material bonded to the surface, e.g. markings; for maintaining earth roads, clay courts or like surfaces by means of surface working tools, e.g. scarifiers, levelling blades
    • E01C23/085—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road for roughening or patterning; for removing the surface down to a predetermined depth high spots or material bonded to the surface, e.g. markings; for maintaining earth roads, clay courts or like surfaces by means of surface working tools, e.g. scarifiers, levelling blades using power-driven tools, e.g. vibratory tools
    • E01C23/088—Rotary tools, e.g. milling drums

Definitions

  • This invention relates to road cutting apparatus, and in particular concerns road cutting apparatus involving the removal and reinstatement of the road surface.
  • the road surface may be removed in a number of ways. For example it may be planed using typically a drum planer with cutting picks thereon. Road working may take place on the road surface and/or on pavements, and the road surface may be removed and replaced in a patching operation where an area of the surface is removed and is refilled by means of a replacement bituminous material such as a tarmacadam or asphalt. Patch work may be carried out where for example previous patch work has subsided or where the road surface has become worn or broken, and it is in this area indeed where considerable application for the utilisation of a road cutting apparatus presents itself.
  • the road cutting apparatus should also be capable of mobility.
  • road cutting apparatus which are described as road grooving machines which are designed to roughen the surface of the road where wear has caused it to become smooth.
  • An example of such a machine is shown and described in US Patent 2,311,891 dated 23rd February 1943.
  • the machine described comprises a square frame carrying the road grooving discs and the frame is suspended at its corners by four wheels which are positionable between two positions namely a first position in which the wheels are aligned in the direction in which the machine moves as grooving takes place, and a second position at right angles to said direction so that the machine can move laterally to set the machine to perform a parallel grooving operation.
  • Some of the support wheels must run on the newly grooved surface.
  • Road grooving machines are different machines from the road planing machines or apparatus to which the present invention relates.
  • European Patent Application No. 0067386 discloses a road planing machine which comprises two front support wheels and one rear support end traction wheel and two planing drums which are hung on the side of the machine.
  • the machine is designed to move in a straight line and if it is maneouvered between cuts it must be done by different manual manipulation.
  • the present invention seeks to address the removal of road surfaces in strips and by planing.
  • a road cutting apparatus comprising a frame, suspension and traction wheels, a rotary planer drum for cutting strips in the road surface, and means for raising the drum to a transport position, and lowering it to a cutting position, said drum being arranged in relation to said wheels such that the wheels run on the uncut road surface when the cutter is cutting a strip, characterised in that the wheels are steerable enabling the apparatus to be moved on the wheels and on the uncut road surface laterally of each cut strip after the drum has been placed in the raised position.
  • wheel does not necessarily mean that only a single wheel is present; it may be a wheel cluster involving two or more wheels.
  • said wheels comprise first, second and third ground engaging and transport wheels arranged at the apices of a triangle in relation to the centroid of which the planer drum is offset, and wherein in side elevation in a direction transverse to the direction of cutting the first and second wheels lie to one side of the drum and the third wheel lies to the other side of the drum.
  • the drum should be offset in relation to the triangle defined by the suspension wheels because then the wheels run on the uncut surface of the road keeping the apparatus level.
  • the apparatus is of substantial weight and is preferably a relatively small one man operated unit, on which the operator may be standing.
  • the planer drum when operational produces torque reaction on the rest of the apparatus and as it is offset in relation to the said wheels there could be a tendancy for the apparatus to tip or rock about a side of the said triangle.
  • the disposition and location of the three wheels in relation to the drum is of importance for optimum operation of the apparatus, having regard to the size of planing drum, the weight of the apparatus, the speed of cutting and the like, and in a preferred arrangement, as set forth hereinafter the said wheels are located at particular dispositions in relation to the drum.
  • the drum may be replaced by a slitting cutter or cutters for providing narrow cuts in the road surface.
  • the drum is arranged so that its centre is outside the said triangle defined by the three wheels.
  • the apparatus may be adapted to be connected to a vehicle which provides the motive force for moving the apparatus over the ground.
  • the apparatus preferably has a connection with the vehicle such that at least some of the vehicle weight can be transferred to the apparatus so that the drum will be thrust onto the ground with sufficient force for effective cutting by the drum.
  • the traction may be provided by hydraulic driver means supplied with hydraulic fluid from the vehicle via the vehicle engine and a suitable pump means.
  • the apparatus may be self propelled in which case it may be provided with its own engine connected to drive the planer drum and to provide the traction to the wheels for moving the apparatus.
  • the transmission from the engine to the planer drum and traction wheel or wheels preferably is hydraulic and includes a pump and appropriate hydraulic motors.
  • the traction wheel/wheels preferably is/are adapted to be driven at creep speed to give the planer drum sufficient time effectively to cut the road surface.
  • the traction wheels are preferably also steering wheels, whilst the second wheel preferably is a castoring wheel.
  • the third wheel may preferably be capable of manual angular adjustment to a number of positions, but once adjusted remains fixed until re-adjusted.
  • the wheels may be relatively adjusted in height so that the drum can be set at an angle to the surface to be cut.
  • planer drum may be provided with a hood to embrace the cutter and to which suction may be applied for removing spoil and debris as described in our co-pending application No 9205346.1.
  • the planer drum may be mounted for pivotal movement for height adjustment or it may be mounted for vertical sliding movement for such adjustment.
  • the adjustment may be effected by means of a hydraulic ram or the like.
  • the apparatus of the invention has the advantage that after the apparatus has made a cut in one direction, the steering wheels can be moved to a steered position in which their axes are parallel or substantially so and the apparatus can be moved sideways relative to the cut and then by further steering of the wheels rearwardly parallel to the cut so that a second parallel cut can be made, and the process can be repeated in order to remove an area of road surface.
  • the steered wheels are also powered, by independent or coupled drive means, such as one or more hydraulic motors.
  • the first wheel is adapted to be steerable through a substantial angle in the order of 200°
  • the third wheel (which can also be a depth control wheel) is adapted to be steered through an angle which is also substantial, and is in the order of 100° at least.
  • Fig 1 shows a side view of a planer apparatus according to an embodiment of the invention
  • Fig 2 illustrates the rolling components of the apparatus shown in Fig 1, in perspective view
  • Fig 3 is a plan view of the rolling components of Fig 2 showing their spatial disposition
  • Fig 4 shows the cutting apparatus at the end of a movement in which a strip of road surface is removed
  • Fig 5 shows the apparatus in Fig. 4 with the first and second wheels in a steered position for moving the apparatus at right angles to the cutting direction;
  • Fig 6 shows the apparatus in the Fig. 5 position but with the wheels steered to move the apparatus in the opposite direction to the cutting direction;
  • Fig 7 shows the apparatus in the same condition as in Fig. 4 but during a subsequent cutting operation
  • Fig 8 shows the apparatus with the steering wheels arranged to enable the apparatus to rotate substantially within its own dimensions in plan view.
  • the apparatus is illustrated by numeral 10 and is controlled by an operator 12 who controls the apparatus by means of control handle 14.
  • an operator 16 stands on an operator platform 18 (or seat) and travels with the apparatus, effecting control of same by means of a steering wheel 20 and a steering linkage 22.
  • the steering and control is by means of the handle 14, whilst in another arrangement the steering and control is by means of a steering wheel 20.
  • the arrangement wherein the operator travels with the machine is preferred.
  • the machine comprises a main or spine plate 24 which in use is disposed vertically, and supported on the spine plate are first, second and third ground engaging and transport wheels 26,28 and 30 which ride on the road surface and support the machine.
  • the first wheel 26 is a traction wheel and is connected to a hydraulic motor 32 by which the wheel 26 can be rotated at a creep speed to enable the appartus to move over the ground sufficiently slowly to enable effective planing to take place.
  • the second wheel 28 is a castoring wheel, that is to say it is mounted for rotation about a vertical axle 29 (Fig. 2) which is offset in relation to the centre of the wheel 28.
  • the wheel 28 is laterally spaced relative to the wheel 26 as will be described, whilst the third wheel 30 is a support and depth control wheel.
  • the wheel 30, as will be explained hereinafter is steerable and can be power steered in one embodiment or manually angularly adjusted and then fixed in adjusted position in another embodiment depending upon the manner in which the apparatus is to work.
  • the spine plate 24 carries an internal combustion engine 36 which provides the motive power for propelling the apparatus, and also for power driving a planing drum 38 and for supplying hydraulic fluid to a control ram 40 the purpose of which is to height adjust the planing drum 38 by expansion and contraction of the ram.
  • the planing drum 38 is carried by a housing or hood 42 which is pivotally mounted on the main plate at axle 44. Expansion and contraction of the ram 40 effects raising and lowering of the hood and planing drum 38 as a unit.
  • the planing drum 38 is shown in Fig. 2 as penetrating the ground surface 46 (cutting position) and therefore is in its cutting mode, but it can be raised clear of the ground surface 46 as in Fig. 1 for transportation of the machine.
  • Fig 2 only the wheels 26, 28 and 30 and the planing drum 38 are shown, and this also applies to Fig 3, Fig 2 being a perspective view and Fig 3 being a plan view.
  • Fig 2 also shows that the drum 38 which is rotating in the direction of arrow 56 is in the act of cutting a channel 52 in the road surface 46.
  • the traction wheel 26 is being driven in the direction of arrow 54 in order to propel the machine in the direction of arrow 56.
  • wheel 30 may be a traction wheel, and if it is, it is also driven in the same direction as wheel 26. Taking arrow 56 as the predetermined straight line direction in which the machine is designed to operate.
  • the spatial dispostion of the wheels 26, 28 and 30 in relation to the drum 38 is as follows
  • first and second wheels 26 and 28 are to one side (leading) of the drum 38, whilst the third wheel 30 is to the other side (trailing) of the drum 38. Wheel 28 trails wheel 26.
  • the drum 38 is offset in relation to the triangle defined by lines 58, 60 and 62 which connect the centres of the wheels 26, 28 and 30 so that the centre of drum 38 is displaced from the centroid of that triangle. In fact as shown in Fig 3, the drum 38 is located with its centre outside the triangle.
  • the third wheel 30 is located between the first wheel 26 and the second wheel 28.
  • the efficiency of the machine will depend on the positioning of the three wheels and the positioning of the cutter drum so that the centre of gravity lies as centrally of the triangle as possible.
  • the apparatus because it desirably has its centre of gravity in the triangle, may be provided with a floating ballast weight which can be moved either manually or by hydraulic force under the control of the operator such that the effective centre of gravity of the machine is biased by choice towards the cutting drum during cutting and towards the wheel 26 for increased tractive effort.
  • Figs. 4 to 8 illustrate the exceptional maneouvrability and utility of the apparatus.
  • the said steering rams 80, 82 are coupled to the wheels 26 and 30 to enable the first wheel 26 to be steered through an angle of up to 200°, whilst ram 82 is connected to wheel 30 to enable it to be steered about an axis 83 through an angle of up to 110°.
  • the steering arrangement is such that wheel 26 can be steered to 100° to either side of the position shown in Fig.4, whilst wheel 30 is adapted to be steered by 100° in an anti clockwise direction from the position shown in Fig. 4.
  • the apparatus is shown in Fig. 4 as having completed a working stroke and after having travelled in the direction 56.
  • the strip 52 has been cut in the road surface, and the apparatus has now stopped the cutting, forward motion.
  • the drum 38 is raised clear of the ground, and this is followed by steering movements of the wheels 26 and 30 to position them so that their axes are parallel or nearly so.
  • the wheels 26 and 30 can be set to any angle (within their range of movement) relative to the direction 56 and such angle can be as low as 20-30°.
  • wheels 26 and 30 have been steered to positions at right angles to the positions shown in Fig. 1.
  • the apparatus can now be moved upwards in Fig. 2 as indicated by arrow 88 so that it moves in a direction at right angles to the strip 52.
  • Fig. 7 shows the apparatus in the course of making a second cut 94 in the road surface parallel to and contiguous with the cut 52 thereby progressively to remove a patch of road surface. It will be noticed that the wheel assembly 26 still runs on the uncut surface of the road so that the apparatus will remain level. It is also mentioned that the cutter drum 38 at the beginning of the movement to make the cut 94 will be lowered onto the road surface, and of course the castor wheel 28 will pull into alignment with the direction of movement 56 as the apparatus moves to make the cut 94.
  • the steering wheel assembly 26 and steering wheel assembly 30 can be arranged at different steering angles in order to provide circumstances in which the apparatus can be powering of the wheels 26, 30 in opposite directions more or less to turn within its own width which is excellent for confined space working. If only one wheel is driven, the machine can be rotated about the other wheel.
  • the wheel assemblies 26 and 30 or either of them may be adapted additionally or alternatively for manual steering as required.
  • the wheel 30 is manually steerable to any of a selected number of steered positions in which the wheel 30 can be locked. In at least one of these positions, the apparatus will move at an angle to the strip 52 or be "crabbed" rearwards and sideways relative to the strip when moving between positions corresponding to the position shown in Figs. 5 and 6.
  • a particularly effective arrangement is provided in a relatively small manipulable and manoeuvrable planing apparatus, which is one man operated. Regardless of the operator control provided, it is preferred that these controls have a "dead man" handle arrangement whereby if the operator who is operating the machine suffers an accident or for any reason releases his hold on the controls, the machine will automatically stop. Also in this connection it may be arranged such that when the cutting drum 38 is raised for transportation, the drive thereto will automatically be cut off.
  • Such drive may for example be a hydraulic motor, and prefereably the cutting drum will be rotated at a speed in relation to the creep speed wheel in a ratio in the order of 15 to 1.
  • a unique feature of the apparatus resides in not interconnecting any of the wheels and the configuration of the wheels can be independently operated which provides co ⁇ ordinated steering geometry around a common turning point enabling conventional right or left turns. Additionally however, the wheels can also be positioned into parallel axis geometry to allow lateral displacement of the machine at any angle up to 90° to the normal straight line cutting direction. This is possible because each wheel can be arranged at an angle to said direction either by operator control or by self disposition.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Road Repair (AREA)

Abstract

Un engin de travaux publics destiné à raboter une bande sur la surface d'une route (46) en se déplaçant dans un sens de travail (56), comprend un tambour de rabotage (38). Afin de conférer une certaine stabilité à cet engin pendant l'opération de rabotage, on a doté celui-ci d'une suspension à trois points d'appui, à savoir qu'il repose sur trois roues (26, 28, 30) placées aux sommets d'un triangle ABC asymétrique par rapport au sens du travail (56), le tambour de rabotage (38) se situant en dehors de ce triangle, au voisinage du côté AC, et derrière deux des roues par rapport audit sens du travail (56), de manière que les roues puissent rouler sur la surface de route non rabotée pendant l'opération de rabotage. On peut orienter indépendamment les roues situées aux sommets AC du triangle, la troisième roue étant une roue pivotante donnant à l'engin une excellente manoeuvrabilité.
EP94929609A 1993-10-18 1994-10-17 Engin de travaux publics destine au rabotage du revetement routier Ceased EP0724668A1 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
GB9321457 1993-10-18
GB939321457A GB9321457D0 (en) 1993-10-18 1993-10-18 Improvements relating to road working apparatus (tri-wheel planer)
GB939326460A GB9326460D0 (en) 1993-12-24 1993-12-24 Improvements relating to road working apparatus
GB9326460 1993-12-24
PCT/GB1994/002264 WO1995011346A1 (fr) 1993-10-18 1994-10-17 Ameliorations apportees a un engin de travaux publics destine au rabotage du revetement routier

Publications (1)

Publication Number Publication Date
EP0724668A1 true EP0724668A1 (fr) 1996-08-07

Family

ID=26303693

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94929609A Ceased EP0724668A1 (fr) 1993-10-18 1994-10-17 Engin de travaux publics destine au rabotage du revetement routier

Country Status (4)

Country Link
EP (1) EP0724668A1 (fr)
AU (1) AU7860494A (fr)
CA (1) CA2174125A1 (fr)
WO (1) WO1995011346A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9623689D0 (en) * 1996-11-14 1997-01-08 Tetlaw Contracting Company Lim Road planing machines
NL1021502C2 (nl) * 2002-09-20 2004-03-23 Henk Ronald Van Marum Inrichting voor het vervaardigen van een cunet langs een wegdek en gebruik van een dergelijke inrichting daarvoor.
CH715857B1 (de) * 2019-08-14 2020-08-14 Airtec Ag Vorrichtung und Verfahren für den Abtrag von Bodenbelägen.

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2311891A (en) * 1941-04-17 1943-02-23 Tyson Harry Road grooving machine
US4256344A (en) * 1978-12-18 1981-03-17 Concrete Safety Equipment, Inc. Concrete surfacing machine
DE3123393A1 (de) * 1981-06-12 1982-12-30 Berthold 5910 Kreuztal Wurmbach "fraesvorrichtung"

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9511346A1 *

Also Published As

Publication number Publication date
CA2174125A1 (fr) 1995-04-27
AU7860494A (en) 1995-05-08
WO1995011346A1 (fr) 1995-04-27

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