EP3767037B1 - Milling installation - Google Patents

Milling installation Download PDF

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Publication number
EP3767037B1
EP3767037B1 EP20183532.9A EP20183532A EP3767037B1 EP 3767037 B1 EP3767037 B1 EP 3767037B1 EP 20183532 A EP20183532 A EP 20183532A EP 3767037 B1 EP3767037 B1 EP 3767037B1
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EP
European Patent Office
Prior art keywords
milling
conveyor belt
milling system
hydraulic
wheel housing
Prior art date
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Application number
EP20183532.9A
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German (de)
French (fr)
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EP3767037A1 (en
Inventor
Daniel Bergert
Wolfgang Beck
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.)
Bergert Group GmbH
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Bergert Group GmbH
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Publication date
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Publication of EP3767037A1 publication Critical patent/EP3767037A1/en
Application granted granted Critical
Publication of EP3767037B1 publication Critical patent/EP3767037B1/en
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Classifications

    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02FDREDGING; SOIL-SHIFTING
    • E02F5/00Dredgers or soil-shifting machines for special purposes
    • E02F5/02Dredgers or soil-shifting machines for special purposes for digging trenches or ditches
    • E02F5/08Dredgers or soil-shifting machines for special purposes for digging trenches or ditches with digging wheels turning round an axis
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02FDREDGING; SOIL-SHIFTING
    • E02F5/00Dredgers or soil-shifting machines for special purposes
    • E02F5/02Dredgers or soil-shifting machines for special purposes for digging trenches or ditches
    • E02F5/14Component parts for trench excavators, e.g. indicating devices travelling gear chassis, supports, skids
    • E02F5/145Component parts for trench excavators, e.g. indicating devices travelling gear chassis, supports, skids control and indicating devices
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02FDREDGING; SOIL-SHIFTING
    • E02F7/00Equipment for conveying or separating excavated material
    • E02F7/02Conveying equipment mounted on a dredger

Definitions

  • the present invention relates to a milling system for making a laying slot in a ground surface, which has a carrier vehicle and a milling device which is arranged at the front of the carrier vehicle, is connected to the carrier vehicle and has a milling wheel, at least one hydraulic drive and a milling wheel housing with a milling wheel provided at the front Ejection window on which a conveyor belt is provided during operation of the milling system.
  • Milling systems of this type are used for so-called trenching, in which a slot is milled into a road surface, an asphalt footpath or cycle path or into unpaved surfaces, into which burial micropipes or cables are then inserted and which is then sealed with a filling compound.
  • Milling with the milling wheel enables precise and clean cutting of asphalt, concrete and stone without damaging the trench wall of the slot created.
  • a milling machine of the type mentioned at the outset was presented by the Simex company.
  • the advantage of the conveyor belt arranged at the ejection window is that the excavation material produced during milling can be transported away on the conveyor belt.
  • the conveyor belt is provided at the front of the carrier vehicle, only relatively small and light conveyor belts can be used here, with which, for example, an excavator shovel can be filled with the milled material, but not a truck traveling with it, since the milling system would otherwise tip over.
  • an excavator with a large shovel has to travel along, which can then be unloaded by the excavator onto a truck. This is very cumbersome, time consuming and expensive.
  • the pamphlet WO 2016/102646 A1 describes a device for removing solid surfaces, which can be attached to the front of a carrier vehicle.
  • the device has a housing in which a rotatable removal device, such as a paddle wheel, is installed.
  • the impeller is driven by a hydraulic motor included in the device.
  • a coupling is attached to the housing for attaching the device to the carrier vehicle.
  • a discharge opening aligned in the direction of travel is provided in the housing.
  • the device has, among other things, a hydraulic cylinder.
  • a milling system for making a laying slot in a soil surface which comprises a carrier vehicle, a milling wheel arranged at the front of the carrier vehicle, connected to the carrier vehicle and having a hydraulic drive, and a milling wheel housing provided around the milling wheel with an ejection window provided at the front of the milling wheel in which a conveyor belt is provided during operation of the milling system, in which a front hydraulic support cylinder, which is vertically aligned in a working position of the milling system and can be extended downwards, is provided on the milling wheel housing in the forward direction of travel of the milling system in front of the axis of rotation of the milling wheel; in the forward direction of travel of the milling system behind the axis of rotation of the milling wheel, a rear hydraulic support cylinder which is vertically aligned in the working position of the milling system and can be extended upwards is provided; and a hydraulic balance cylinder hydraulically coupling the front and rear hydraulic support cylinders.
  • the cutter wheel housing is provided around the top and sides of the cutter wheel.
  • the cutting wheel with the cutting wheel teeth provided on it partially protrudes from the bottom of the cutting wheel housing in order to be able to cut.
  • the milling wheel When the milling machine is in operation, the milling wheel rotates clockwise when viewed from the right. Material milled off the teeth of the milling wheel is taken along by the rotation of the milling wheel and ejected onto the conveyor belt through the ejection window. The conveyor belt then transports the material away from the milling machine.
  • the conveyor belt is in front of the cutting wheel and not to the side of the cutting wheel. Therefore, in the milling system according to the invention, the rotational movement of the milling wheel promotes the ejection of material onto the conveyor belt.
  • the milled material does not have to be deflected to the side. Instead, the material is already ejected in the transport direction.
  • the inventive arrangement of the conveyor belt in front of the cutting wheel excavated material can be transported by the conveyor belt directly to a vehicle driving ahead.
  • the hydraulic cylinder arrangement provided on the milling system according to the invention ensures that the front load, which is caused by the conveyor belt and the material that is conveyed on the conveyor belt, is balanced, so that the milling system does not twist or tilt or even tip over during operation.
  • the hydraulic cylinder arrangement stabilizes the milling system without having to add weight to the milling wheel housing.
  • the rear hydraulic support cylinder and the front hydraulic support cylinder are preferably designed as plunger piston cylinders.
  • the respective pistons located in the rear hydraulic support cylinder, the hydraulic compensating cylinder and the front hydraulic support cylinder are each in a middle position.
  • Hydraulic fluid is located in the rear hydraulic support cylinder in a hydraulic area formed below the piston located therein.
  • Hydraulic fluid is located in the front hydraulic support cylinder in a hydraulic area formed above the piston located therein.
  • Hydraulic fluid is located in the hydraulic compensating cylinder both in hydraulic areas formed above and below the piston located therein.
  • An upper hydraulic area of the hydraulic compensating cylinder is connected to the lower hydraulic area of the rear hydraulic support cylinder via a hydraulic line.
  • a lower hydraulic section of the hydraulic balance cylinder is connected to the upper hydraulic section of the front hydraulic support cylinder via a hydraulic line.
  • the piston rod of the rear hydraulic support cylinder protrudes upwards from the relevant cylinder.
  • the piston rod of the front hydraulic support cylinder protrudes downwards from the relevant cylinder.
  • a lower area of the cylinder of the rear hydraulic support cylinder is preferably pivotably connected to a lower cutting wheel housing area located behind the axis of rotation of the cutting wheel in the forward direction of travel of the cutting system.
  • An upper end of the piston rod of the rear hydraulic support cylinder is connected to an upper cutting wheel housing area located behind the axis of rotation of the cutting wheel in the forward travel direction of the cutting system.
  • a lower end of the The piston rod of the front hydraulic support cylinder is preferably pivotably connected to a lower cutting wheel housing area located in the forward travel direction of the cutting system in front of the axis of rotation of the cutting wheel.
  • An upper area of the cylinder of the front hydraulic support cylinder is connected to an upper cutting wheel housing area located in front of the axis of rotation of the cutting wheel in the forward travel direction of the cutting system.
  • the closed hydraulic cylinder arrangement used and described above thus has a self-leveling effect.
  • the cutting wheel housing and also the cutting wheel depth adjustment of the cutting wheel are always held in a horizontal position, despite the additional add-on weight caused by the conveyor belt and the material lying on it or being conveyed.
  • the milling system according to the invention compared to the prior art to provide a longer conveyor belt with a correspondingly greater weight close to the milling wheel on the milling wheel housing, in order to bridge the distance and the difference in height to a truck driving in front, for example, and to load it with the milled material to be loaded directly by the conveyor belt.
  • vents are provided on the front hydraulic support cylinder and on the rear hydraulic support cylinder.
  • the conveyor belt is at least 3 m long, particularly preferably at least 3.50 m long. Such a length is sufficient to be able to fill a truck directly with the conveyor belt with the milled material.
  • a conveyor belt of the conveyor belt is preferably at least 25 cm wide, particularly preferably at least 30 cm wide. With such a conveyor belt width, the milled material produced during milling can be picked up and removed efficiently.
  • the conveyor belt is pivotably mounted on the milling wheel housing and can be moved from the working position of the milling system, in which a rear end of the conveyor belt is located at the ejection window, to a holding or transport position of the milling system, in which the conveyor belt is at a Holding side of the cutting wheel housing is held, and pivoted vice versa. This facilitates the maneuverability of the milling system and saves space when the milling system is not in use.
  • the milling system is constructed in such a way that a horizontally aligned transport support for the conveyor belt, which is mounted on the milling wheel housing, protrudes laterally on the holding side of the milling wheel housing.
  • the conveyor belt can be placed on this transport support in the holding or transport position of the milling system and secured to it.
  • Milling wheel housing is provided with a horizontally pivotable rotary pivot device connected to the conveyor belt, with a retractable and extendable tilt adjustment cylinder attached to it for the conveyor belt.
  • a horizontally pivotable rotary pivot device connected to the conveyor belt
  • a retractable and extendable tilt adjustment cylinder attached to it for the conveyor belt.
  • the angle of inclination of the conveyor belt can be adjusted hydraulically from a driver's cab of the carrier vehicle. This makes it possible for the milled material to be thrown off the conveyor belt in a targeted manner onto trucks with different loading heights, whereby the loading capacity of the loading area of the respective truck can be fully utilized.
  • the inclination or setting angle of the conveyor belt can preferably be adjusted with the aid of the inclination adjustment cylinder in a range from 0° to 30°, particularly preferably in a range from 0° to 45°.
  • the same hydraulic drive can be used to control the inclination adjustment cylinder as for adjusting the milling wheel.
  • the milling system then advantageously has a hydraulic valve that can be electrically controlled and switched over from the carrier vehicle, for example via a joystick, and is integrated into the hydraulic supply of the inclination adjustment cylinder and the milling wheel drive.
  • the inclination adjustment cylinder is connected to both longitudinal support profiles of the conveyor belt. This prevents twisting of the conveyor belt.
  • a U-shaped fork can be provided at one end of the inclination adjustment cylinder facing the conveyor belt, which grips the conveyor belt from above, the side struts of the U being fastened to the longitudinal support profiles of the conveyor belt.
  • the inclination adjustment cylinder is mounted on a holding column profile of the rotating/pivoting device that is vertically aligned when the milling system is in the working position, and can be pivoted on it.
  • the vertically aligned support stand profile preferably forms a right angle with the inclination adjustment cylinder in the working position of the milling system.
  • a suitable height or inclination of the conveyor belt can also be set by the height of the support stand profile.
  • the conveyor belt is always held securely by means of the rotating/pivoting device and the inclination adjustment cylinder provided thereon, and the inclination of the conveyor belt can also be suitably changed during the pivoting of the conveyor belt from the working position into a holding or transport position.
  • the holding stand profile is connected via a holding angle profile construction to a pivoting stand profile which can be rotated about its longitudinal axis and is vertically aligned in the working position of the milling plant. Due to the bracket profile construction, the support stand profile be positioned centrally relative to the conveyor belt, so that the conveyor belt can be held against rotation, although the swivel stand profile itself is attached off-centre to the conveyor belt on the side of the milling system.
  • a support angle profile construction or support bracket is provided on the swivel stand profile which is guided around the rear side of a lower end of the conveyor belt and can be swiveled around the swivel stand profile.
  • the conveyor belt is suitably supported, in particular below the ejection window.
  • a buckling safety device is provided between the inclination adjustment cylinder and the conveyor belt.
  • the buckling protection can be designed, for example, in the form of a safety buckling linkage.
  • the kink protection increases the safety of the conveyor belt's mounting, which is advantageous, for example, if the conveyor belt is driven against an obstacle.
  • an ejection wedge or tooth is provided within the cutting wheel housing, in front of and above the cutting wheel, which is aligned in the forward direction of travel and whose underside forms an angle with the ground surface.
  • the underside of the ejector wedge or tooth may be straight or concave. Due to the angle of the ejection wedge or tooth, the milled material is preferably directed in the direction of the conveyor belt and is not carried along by the milling wheel in its rotary movement. The ejection is therefore forward.
  • the conveyor tunnels can have a height of 3 to 5 cm, preferably 4 cm.
  • the conveyor lugs are preferably made of rubber or PVC fabric belt.
  • the conveyor cleats can, for example, be vulcanized onto the conveyor belt. With the aid of the conveyor cleats, the throwing distance of the conveyor belt can be extended in comparison to using a conveyor belt without such conveyor cleats.
  • At least one opening is provided in a rear area of the milling wheel housing opposite the ejection window.
  • the opening can be closed or closable by a flap.
  • this opening is preferably kept open during operation of the milling system. This results in a backwards suction, whereby material falling out of the cutting wheel housing at the side can be avoided or at least greatly reduced.
  • the carrier vehicle is a caterpillar or tracked vehicle. This results in a particularly high tipping safety of the milling system. In principle, however, it is also possible for the carrier vehicle to have wheels.
  • an ejection hood open over the conveyor belt is attached to the ejection window.
  • the ejection hood extends the ejection channel so that the milled material can fall onto the conveyor belt.
  • the chute preferably includes a chute roof extending in the direction of the conveyor belt and associated or integral therewith, forwardly and upwardly tapering chute sides. The discharge hood sides act as side scrapers.
  • the discharge hood is made of rubber.
  • a discharge flap made of flexible material is provided in front of a front end of the conveyor belt.
  • the discharge flap can be provided, for example, at a distance of 20 to 40 cm in front of the front end of the conveyor belt.
  • the discharge flap can be suspended, for example, on two spacer struts each fastened to the two longitudinal support profiles of the conveyor belt.
  • the discharge flap can be made of rubber, for example.
  • the hydraulic compensating cylinder is preferably provided at an angle between the front and rear hydraulic support cylinders.
  • the hydraulic compensating cylinder which can be longer than the front and rear hydraulic support cylinders, can be easily accommodated with the hydraulic hoses connected to it in the space between the front and rear hydraulic support cylinders that is present anyway.
  • the longitudinal support profiles, the drive roller and the deflection roller of the conveyor belt are made of aluminum.
  • the conveyor belt base frame can be made, for example, from aluminum press-compression elements.
  • the design of the conveyor belt elements from aluminum also results in a high elasticity of the conveyor belt with a high load-bearing capacity at the same time.
  • the drive roller and the deflection roller of the conveyor belt have a small diameter, for example a diameter of 8 to 15 cm.
  • the conveyor belt of the conveyor belt is made of PVC fabric belt.
  • the PVC fabric belt is flexible, can also be used to advantage with smaller diameters of the drive and deflection rollers of the conveyor belt and is highly resilient.
  • the conveyor belt has a hydraulic drive which is integrated into a drive hydraulic system of the carrier vehicle.
  • the conveyor belt drive can be connected via a hydraulic connection be supplied directly from the carrier vehicle with hydraulic fluid under the appropriate pressure.
  • the conveying speed of the conveyor belt can be regulated, for example, with a hydraulic valve that is electronically controlled from the driver's cab of the carrier vehicle.
  • a driver of the carrier vehicle can control the conveying speed of the conveyor belt from his seat during operation of the milling system, for example via an electronic speed controller. This also regulates the ejection distance and the ejection quantity and determines the ejection location.
  • figure 1 shows schematically an embodiment of a milling system 1 according to the invention in a side view from the left.
  • the milling system 1 is used to make a laying slot in a ground surface 10.
  • the milling system 1 has a carrier vehicle 2, a milling device 3 and a conveyor belt 7 provided thereon.
  • the carrier vehicle 2 is a caterpillar or tracked vehicle.
  • the carrier vehicle 2 has a driver's cab 21 in which a driver can sit and operate the carrier vehicle 2 as well as the milling device 3 and the conveyor belt 7 .
  • the carrier vehicle 2 has a hydraulic drive.
  • the milling device 3 is arranged at the front of the carrier vehicle 2 , ie in front of the carrier vehicle 2 in the forward travel direction V, and is connected to the carrier vehicle 2 .
  • the milling device 3 also moves in the forward direction V when the carrier vehicle 2 is driving in the forward direction V.
  • the milling device 3 has a milling wheel 4 .
  • cutting teeth 42 are provided which protrude in different directions. Some of these cutting teeth 42 are shown in figure 3 shown in which the milling system 1 from figure 1 is shown schematically in a side view from the right.
  • the milling wheel 4 rotates about its axis of rotation A in a direction of rotation D, i.e. in figure 1 in clockwise direction. Due to this rotation, the milling teeth 42 engage in the soil surface 10 and thereby mill the laying slot into the soil surface 10 .
  • the material removed in the process is referred to below as milled material.
  • the milled material is first taken along in the direction of rotation D by the milling teeth 42 .
  • the milling device 2 also has a milling wheel housing 6 around an upper and middle region of the milling wheel 4 .
  • an ejection window 61 is provided in a front portion of the cutting wheel housing 6, in a front portion of the cutting wheel housing 6, an ejection window 61 is provided.
  • the ejection window 61 is located above the conveyor belt 7.
  • a region of the milling wheel housing 6 located directly above a rear end 72 of the conveyor belt 7 is closed, so that the milled material cannot fall onto the conveyor belt 7 here.
  • Milled material ejected through the ejection window arranged further up onto the conveyor belt 7 can thus roll from top to bottom on the conveyor belt 7 and is nevertheless transported away easily in the further course.
  • an ejection hood 66 is attached above and to the side of the ejection window 61 .
  • a scraper is provided on the ejection window 61 under the ejection hood 66 .
  • At least one opening is provided in a rear area 65 of the cutting wheel housing 6 opposite the ejection window 61 . This creates a suction effect, as a result of which the milled material is conveyed away primarily in the direction of rotation D of the milling wheel 4 and only slightly or not at all falls to the side.
  • a hydraulic cylinder arrangement 8 is provided on one side of the cutting wheel housing 6 .
  • the hydraulic cylinder assembly 8 is individually in figure 2 shown schematically.
  • the hydraulic cylinder arrangement 8 has a front hydraulic support cylinder 81 , a hydraulic balancing cylinder 82 and a rear hydraulic support cylinder 83 .
  • the front hydraulic support cylinder 81 is provided in front of the axis of rotation A of the cutting wheel 4 in the forward travel direction V. In the working position of the milling machine 1, it is aligned vertically.
  • the front hydraulic support cylinder 81 has a piston 88 which can be extended downwards.
  • the hydraulic balance cylinder 82 is connected to an upper hydraulic section 811 of the front hydraulic support cylinder 81 via a hydraulic line 84 .
  • the rear hydraulic support cylinder 83 is provided in the forward travel direction V of the milling machine 1 behind the axis of rotation A of the milling wheel 4 .
  • the rear hydraulic support cylinder 83 has a piston 89 that can be extended upwards.
  • a hydraulic section 831 of the rear hydraulic support cylinder 83 arranged at the bottom is connected to the hydraulic compensating cylinder 82 via a hydraulic line 85 .
  • the hydraulic compensating cylinder 82 is aligned parallel to the front hydraulic support cylinder 81 and the rear hydraulic support cylinder 83 in the working position.
  • the hydraulic compensating cylinder 82 can also be provided in an obliquely aligned manner between the front and rear hydraulic support cylinders 81, 83.
  • Bleeders 86, 87 are provided on the front hydraulic support cylinder 81 and on the rear hydraulic support cylinder 83, respectively.
  • the milled material is thrown onto the conveyor belt 7 through the ejection window 61 and the ejection hood 66 by the rotation of the milling wheel 4 .
  • the conveyor belt 7 has a conveyor belt base frame with two parallel longitudinal support profiles 73, 74. At a front end 71 of the conveyor belt 7, between the longitudinal support profiles 73, 74, a drive roller 78 lying transversely to the longitudinal support profiles 73, 74 is provided.
  • the drive roller 78 is coupled to a hydraulic drive 5 .
  • the hydraulic drive is a hydraulic motor which is attached to the drive roller 78 with a bracket. As a result, the rotational speed of the drive roller 78 can be continuously adjusted without any loss of power. Due to the stepless speed control, the throw and the transport quantity on the conveyor belt 7 as can also be regulated on the truck or transport vehicle supplied by the conveyor belt 7.
  • the hydraulic drive 5 is integrated into a drive hydraulic system of the carrier vehicle 2 .
  • a transverse to the longitudinal support profiles 73, 74 lying deflection roller 79 is provided.
  • the conveyor belt base frame, the drive roller 78 and the deflection roller 79 are made of aluminum, but in other embodiments of the present invention they can also be made of another, preferably light-weight, material.
  • a conveyor belt 75 circulating around the drive roller 78 and the deflection roller 79 is provided between the longitudinal support profiles 73 , 74 in the conveying direction F of the conveyor belt 7 .
  • the conveyor belt 75 is made of PVC fabric tape, but it can also be made of rubber.
  • conveying lugs 76 On the conveying surface of the conveyor belt 75, on which the milled material rests and is transported away by means of the conveyor belt 7, conveying lugs 76, which are spaced apart from one another in the conveying direction F and directed upwards, are applied in the exemplary embodiment shown.
  • the conveyor lugs 76 are made of rubber.
  • the conveyor lugs 76 have a height of 40 mm in the example shown.
  • a cover, not shown here, is provided under the conveyor belt 7 .
  • the conveyor belt 7 has a length of 3.5 m.
  • the width of the conveyor belt 75 is 35 cm in the example shown.
  • the conveyor belt 7 is mounted on the milling device 3 at a distance of 3.0 to 3.5 cm from the milling wheel 4 .
  • the conveyor belt 7 is held on the cutting wheel housing 6 by means of a rotating/pivoting device 9 .
  • a rotating/pivoting device 9 can also the conveyor belt 7 from the figures 1 and 3 shown working position of the milling machine 1 in one of the figures 4 and 5 shown holding and transport position of the milling machine 1 and be spent in reverse.
  • the conveyor belt 7, which is firmly mounted on the milling device 3, can be pivoted by 180° using the rotating/pivoting device 9 and, when it is folded onto the side of the milling device 3, is supported by a transport support 62.
  • the conveyor belt 7 is attached to a front side of the milling device 3 when the milling system 1 is in operation.
  • the rotating and swiveling device 9 is relieved during operation of the milling system 1 and has no side load.
  • the rotating/pivoting device 9 is subject to only little wear and runs smoothly.
  • the rotating/pivoting device 9 has a swivel stand profile 93 mounted directly on the cutting wheel housing. When the milling system 1 is in the working position, the swivel stand profile 93 is erected vertically.
  • a support angle profile construction 94 which is guided around the rear side of the lower end 71 of the conveyor belt 7 and can be swiveled around the swivel post profile 93 .
  • the supporting angle profile construction 94 is U-shaped in the exemplary embodiment shown.
  • a holding angle profile construction 92 which can also be pivoted about the pivoting stand profile 93 .
  • a holding stand profile 91 is provided on the holding angle profile construction 92 and is aligned vertically upwards when the milling system is in the working position.
  • a tilt adjusting cylinder 90 which is connected to the conveyor belt 7 is mounted on the holding stand profile 91 .
  • the inclination adjustment cylinder 90 is connected to the two longitudinal support profiles 73, 74 of the conveyor belt 7 via a U-shaped fork 96.
  • the inclination adjustment cylinder 90 works hydraulically and can be moved in and out and can thus adjust the height and thus the inclination of the conveyor belt 7 .
  • An anti-kink device 95 is provided between the inclination adjustment cylinder 90 and the conveyor belt 7 .
  • the kink protection 95 forms a collision protection.
  • the anti-buckling device 95 has a groove 97 into which a retaining strut 98 emanating from the inclination adjustment cylinder 90 engages and which is screwed or riveted therein.
  • the conveyor belt 7 is held in a holding and transport position of the milling system 1 on a holding side of the milling wheel housing 6 .
  • the cutting wheel housing 6 has on its holding side the laterally protruding transport support 62 for the conveyor belt 7, on which the conveyor belt 7 is placed and on which it is preferably secured in the holding and transport position.
  • the conveyor belt 7 is secured in the working position as well as in the holding and transport position via folding locks.

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

Description

Die vorliegende Erfindung betrifft eine Fräsanlage zum Einbringen eines Verlegungsschlitzes in eine Bodenoberfläche, welche ein Trägerfahrzeug und eine Fräsvorrichtung aufweist, die frontseitig des Trägerfahrzeuges angeordnet ist, mit dem Trägerfahrzeug verbunden ist und ein Fräsrad, wenigstens einen Hydraulikantrieb sowie ein Fräsradgehäuse mit einem frontseitig des Fräsrades vorgesehenen Auswurffenster, an dem im Betrieb der Fräsanlage ein Förderband vorgesehen ist, aufweist.The present invention relates to a milling system for making a laying slot in a ground surface, which has a carrier vehicle and a milling device which is arranged at the front of the carrier vehicle, is connected to the carrier vehicle and has a milling wheel, at least one hydraulic drive and a milling wheel housing with a milling wheel provided at the front Ejection window on which a conveyor belt is provided during operation of the milling system.

Fräsanlagen dieser Gattung werden beim sogenannten Trenching eingesetzt, bei dem ein Schlitz in eine Straßendecke, einen Asphaltgeh- oder -radweg oder in nicht befestigte Flächen gefräst wird, in welchen dann erdverlegbare Mikrorohre oder Kabel eingelegt werden und welcher anschließend mit einer Füllmasse verschlossen wird.Milling systems of this type are used for so-called trenching, in which a slot is milled into a road surface, an asphalt footpath or cycle path or into unpaved surfaces, into which burial micropipes or cables are then inserted and which is then sealed with a filling compound.

Das Fräsen mithilfe des Fräsrades ermöglicht ein präzises und sauberes Auftrennen von Asphalt, Beton und Stein, ohne die Grabenwand des erzeugten Schlitzes zu beschädigen.Milling with the milling wheel enables precise and clean cutting of asphalt, concrete and stone without damaging the trench wall of the slot created.

Beim Trenching muss das ausgebaute Material beseitigt werden. Manuell ist dies äußerst mühsam. In der Vergangenheit wurden für die Materialbeseitigung daher Saugbagger eingesetzt, wodurch auch längere Bauabschnitte in kurzer Zeit bereinigt werden konnten. Solche Saugbagger sind jedoch sehr kostenintensiv.When trenching, the removed material must be removed. This is extremely tedious to do manually. In the past, suction excavators were therefore used to remove the material, which meant that longer construction sections could also be cleaned up in a short time. However, such suction dredgers are very expensive.

Eine Fräsanlage der eingangs genannten Gattung wurde durch die Firma Simex vorgestellt. Der Vorteil des an dem Auswurffenster angeordneten Förderbandes besteht darin, dass das beim Fräsen entstehende Ausbaumaterial auf dem Förderband abtransportiert werden kann. Da jedoch das Förderband frontseitig des Trägerfahrzeuges vorgesehen ist, können hier nur verhältnismäßig kleine und leichte Förderbänder verwendet werden, mit welchen zwar beispielsweise eine Baggerschaufel, nicht aber ein mitfahrender Lastkraftwagen mit dem Fräsgut befüllt werden kann, da die Fräsanlage sonst kippen würde. Es muss also bei der bekannten Fräsanlage ein Bagger mit einer großen Schaufel mitfahren, welche dann von dem Bagger auf einem Lastkraftwagen entladen werden kann. Dies ist sehr umständlich, zeitraubend und teuer.A milling machine of the type mentioned at the outset was presented by the Simex company. The advantage of the conveyor belt arranged at the ejection window is that the excavation material produced during milling can be transported away on the conveyor belt. However, since the conveyor belt is provided at the front of the carrier vehicle, only relatively small and light conveyor belts can be used here, with which, for example, an excavator shovel can be filled with the milled material, but not a truck traveling with it, since the milling system would otherwise tip over. In the known milling system, therefore, an excavator with a large shovel has to travel along, which can then be unloaded by the excavator onto a truck. This is very cumbersome, time consuming and expensive.

Die Druckschrift WO 2016/102646 A1 beschreibt eine Vorrichtung zum Abtragen von festen Oberflächen, welche frontseitig an ein Trägerfahrzeug angebracht werden kann. Die Vorrichtung weist ein Gehäuse auf, in welchem eine rotierbare Abtragungsvorrichtung, wie ein Schaufelrad, eingebracht ist. Das Schaufelrad wird durch einen von der Vorrichtung umfassten Hydraulikmotor angetrieben. Zum Befestigen der Vorrichtung an dem Trägerfahrzeug ist an dem Gehäuse eine Kupplung angebracht. In dem Gehäuse ist eine in Fahrtrichtung ausgerichtete Entladeöffnung vorgesehen. Zum Einstellen einer Arbeits- und/oder Aushubtiefe weist die Vorrichtung unter anderem einen Hydraulikzylinder auf.The pamphlet WO 2016/102646 A1 describes a device for removing solid surfaces, which can be attached to the front of a carrier vehicle. The device has a housing in which a rotatable removal device, such as a paddle wheel, is installed. The impeller is driven by a hydraulic motor included in the device. A coupling is attached to the housing for attaching the device to the carrier vehicle. A discharge opening aligned in the direction of travel is provided in the housing. To set a working and/or excavation depth, the device has, among other things, a hydraulic cylinder.

Es ist die Aufgabe der vorliegenden Erfindung, eine Fräsanlage der eingangs angegebenen Gattung derart weiterzuentwickeln, dass sie praktikabel mit geringem Maschineneinsatz anwendbar ist, sodass schnell, sauber und preiswert Verlegungsschlitze in Bodenoberflächen erzeugt werden können.It is the object of the present invention to further develop a milling system of the type specified at the outset in such a way that it can be used practicably with little machine use, so that installation slots can be produced in floor surfaces quickly, cleanly and inexpensively.

Diese Aufgabe wird durch eine Fräsanlage zum Einbringen eines Verlegungsschlitzes in eine Bodenoberfläche gelöst, welche ein Trägerfahrzeug, ein frontseitig des Trägerfahrzeuges angeordnetes, mit dem Trägerfahrzeug verbundenes und einen Hydraulikantrieb aufweisendes Fräsrad und ein um das Fräsrad vorgesehenes Fräsradgehäuse mit einem frontseitig des Fräsrades vorgesehenen Auswurffenster, an dem im Betrieb der Fräsanlage ein Förderband vorgesehen ist, aufweist, bei der an dem Fräsradgehäuse in Vorwärtsfahrtrichtung der Fräsanlage vor der Drehachse des Fräsrades ein in einer Arbeitsstellung der Fräsanlage vertikal ausgerichteter, nach unten ausfahrbarer Vorderhydraulikstützzylinder vorgesehen ist; in Vorwärtsfahrtrichtung der Fräsanlage hinter der Drehachse des Fräsrades ein in der Arbeitsstellung der Fräsanlage vertikal ausgerichteter, nach oben ausfahrbarer Hinterhydraulikstützzylinder vorgesehen ist; und ein den Vorder- und den Hinterhydraulikstützzylinder hydraulisch koppelnder Hydraulikausgleichszylinder vorgesehen ist.This object is achieved by a milling system for making a laying slot in a soil surface, which comprises a carrier vehicle, a milling wheel arranged at the front of the carrier vehicle, connected to the carrier vehicle and having a hydraulic drive, and a milling wheel housing provided around the milling wheel with an ejection window provided at the front of the milling wheel in which a conveyor belt is provided during operation of the milling system, in which a front hydraulic support cylinder, which is vertically aligned in a working position of the milling system and can be extended downwards, is provided on the milling wheel housing in the forward direction of travel of the milling system in front of the axis of rotation of the milling wheel; in the forward direction of travel of the milling system behind the axis of rotation of the milling wheel, a rear hydraulic support cylinder which is vertically aligned in the working position of the milling system and can be extended upwards is provided; and a hydraulic balance cylinder hydraulically coupling the front and rear hydraulic support cylinders.

Das Fräsradgehäuse ist oben und seitlich um das Fräsrad vorgesehen. Das Fräsrad mit den daran vorgesehenen Fräsradzähnen ragt unten aus dem Fräsradgehäuse teilweise heraus, um fräsen zu können.The cutter wheel housing is provided around the top and sides of the cutter wheel. The cutting wheel with the cutting wheel teeth provided on it partially protrudes from the bottom of the cutting wheel housing in order to be able to cut.

Das Fräsrad dreht sich im Betrieb der Fräsanlage von rechts gesehen im Uhrzeigersinn. Von den Fräsradzähnen abgefrästes Material wird von diesen durch die Drehung des Fräsrades mitgenommen und durch das Auswurffenster auf das Förderband abgeworfen. Das Förderband transportiert dann das Material von der Fräsanlage weg.When the milling machine is in operation, the milling wheel rotates clockwise when viewed from the right. Material milled off the teeth of the milling wheel is taken along by the rotation of the milling wheel and ejected onto the conveyor belt through the ejection window. The conveyor belt then transports the material away from the milling machine.

Vorteilhafterweise befindet sich bei der vorliegenden Erfindung das Förderband vor dem Fräsrad und nicht seitlich des Fräsrades. Daher begünstigt bei der erfindungsgemäßen Fräsanlage die Rotationsbewegung des Fräsrades den Materialauswurf auf das Förderband. Das Fräsgut muss nicht zur Seite umgelenkt werden. Stattdessen wird das Material schon in Abtransportrichtung ausgeworfen.Advantageously, in the present invention, the conveyor belt is in front of the cutting wheel and not to the side of the cutting wheel. Therefore, in the milling system according to the invention, the rotational movement of the milling wheel promotes the ejection of material onto the conveyor belt. The milled material does not have to be deflected to the side. Instead, the material is already ejected in the transport direction.

Ferner kann durch die erfindungsgemäße Anordnung des Förderbandes vor dem Fräsrad der Materialaushub durch das Förderband direkt auf ein vorausfahrendes Fahrzeug befördert werden.Furthermore, the inventive arrangement of the conveyor belt in front of the cutting wheel excavated material can be transported by the conveyor belt directly to a vehicle driving ahead.

Die an der erfindungsgemäßen Fräsanlage vorgesehene Hydraulikzylinderanordnung sorgt dafür, dass die frontseitige Last, die durch das Förderband und das Material, das auf dem Förderband gefördert wird, besteht, ausgeglichen wird, sodass die Fräsanlage sich im Betrieb nicht verdreht oder abneigt oder gar umkippt.The hydraulic cylinder arrangement provided on the milling system according to the invention ensures that the front load, which is caused by the conveyor belt and the material that is conveyed on the conveyor belt, is balanced, so that the milling system does not twist or tilt or even tip over during operation.

Die Hydraulikzylinderanordnung stabilisiert die Fräsanlage, ohne dass das Gewicht des Fräsradgehäuses erhöht werden muss.The hydraulic cylinder arrangement stabilizes the milling system without having to add weight to the milling wheel housing.

Der Hinterhydraulikstützzylinder und der Vorderhydraulikstützzylinder sind vorzugsweise als Tauchkolbenzylinder ausgebildet. In waagerechter Position des Fräsradgehäuses befinden sich die jeweiligen in dem Hinterhydraulikstützzylinder, dem Hydraulikausgleichszylinder und dem Vorderhydraulikstützzylinder befindlichen Kolben jeweils in einer Mittelposition. In dem Hinterhydraulikstützzylinder befindet sich Hydraulikflüssigkeit in einem unterhalb des darin befindlichen Kolbens ausgebildeten Hydraulikbereich. In dem Vorderhydraulikstützzylinder befindet sich Hydraulikflüssigkeit in einem oberhalb des darin befindlichen Kolbens ausgebildeten Hydraulikbereich. In dem Hydraulikausgleichszylinder befindet sich Hydraulikflüssigkeit sowohl in ober- als auch unterhalb des darin befindlichen Kolbens ausgebildeten Hydraulikbereichen. Ein oberer Hydraulikbereich des Hydraulikausgleichszylinders ist mit dem unten befindlichen Hydraulikbereich des Hinterhydraulikstützzylinders über eine Hydraulikleitung verbunden. Ein unterer Hydraulikbereich des Hydraulikausgleichszylinders ist mit dem oben befindlichen Hydraulikbereich des Vorderhydraulikstützzylinders über eine Hydraulikleitung verbunden.The rear hydraulic support cylinder and the front hydraulic support cylinder are preferably designed as plunger piston cylinders. In the horizontal position of the cutting wheel housing, the respective pistons located in the rear hydraulic support cylinder, the hydraulic compensating cylinder and the front hydraulic support cylinder are each in a middle position. Hydraulic fluid is located in the rear hydraulic support cylinder in a hydraulic area formed below the piston located therein. Hydraulic fluid is located in the front hydraulic support cylinder in a hydraulic area formed above the piston located therein. Hydraulic fluid is located in the hydraulic compensating cylinder both in hydraulic areas formed above and below the piston located therein. An upper hydraulic area of the hydraulic compensating cylinder is connected to the lower hydraulic area of the rear hydraulic support cylinder via a hydraulic line. A lower hydraulic section of the hydraulic balance cylinder is connected to the upper hydraulic section of the front hydraulic support cylinder via a hydraulic line.

Die Kolbenstange des Hinterhydraulikstützzylinders ragt nach oben aus dem betreffenden Zylinder heraus. Die Kolbenstange des Vorderhydraulikstützzylinders ragt nach unten aus dem betreffenden Zylinder heraus. Ein unterer Bereich des Zylinders des Hinterhydraulikstützzylinders ist vorzugsweise schwenkbar mit einem in Vorwärtsfahrtrichtung der Fräsanlage hinter der Drehachse des Fräsrades gelegenen, unteren Fräsradgehäusebereich verbunden. Ein oberes Ende der Kolbenstange des Hinterhydraulikstützzylinders ist mit einem in Vorwärtsfahrtrichtung der Fräsanlage hinter der Drehachse des Fräsrades gelegenen, oberen Fräsradgehäusebereich verbunden. Ein unteres Ende der Kolbenstange des Vorderhydraulikstützzylinders ist vorzugsweise schwenkbar mit einem in Vorwärtsfahrtrichtung der Fräsanlage vor der Drehachse des Fräsrades gelegenen, unteren Fräsradgehäusebereich verbunden. Ein oberer Bereich des Zylinders des Vorderhydraulikstützzylinders ist mit einem in Vorwärtsfahrtrichtung der Fräsanlage vor der Drehachse des Fräsrades gelegenen, oberen Fräsradgehäusebereich verbunden.The piston rod of the rear hydraulic support cylinder protrudes upwards from the relevant cylinder. The piston rod of the front hydraulic support cylinder protrudes downwards from the relevant cylinder. A lower area of the cylinder of the rear hydraulic support cylinder is preferably pivotably connected to a lower cutting wheel housing area located behind the axis of rotation of the cutting wheel in the forward direction of travel of the cutting system. An upper end of the piston rod of the rear hydraulic support cylinder is connected to an upper cutting wheel housing area located behind the axis of rotation of the cutting wheel in the forward travel direction of the cutting system. A lower end of the The piston rod of the front hydraulic support cylinder is preferably pivotably connected to a lower cutting wheel housing area located in the forward travel direction of the cutting system in front of the axis of rotation of the cutting wheel. An upper area of the cylinder of the front hydraulic support cylinder is connected to an upper cutting wheel housing area located in front of the axis of rotation of the cutting wheel in the forward travel direction of the cutting system.

Wenn sich das Fräsradgehäuse infolge einer durch das Förderband ausgebildeten Last nach vorn neigt und somit hinten hebt, wird der Kolben des Vorderhydraulikstützzylinders nach unten gezogen. Dabei wird Hydraulikflüssigkeit aus dem Hydraulikausgleichszylinder in den oberen Hydraulikbereich des Vorderhydraulikstützzylinders gezogen. Ferner wird Hydraulikflüssigkeit zum Ausgleich aus dem unten befindlichen Hydraulikbereich des Hinterhydraulikstützzylinders in den oberen Hydraulikbereich des Hydraulikausgleichszylinders gezogen. Dabei bewegt sich der Kolben des Hinterhydraulikstützzylinders nach unten. Dadurch wird das Fräsradgehäuse oben hinten wieder nach unten gezogen, wodurch das Fräsradgehäuse frontseitig wieder angehoben wird.When the cutter wheel housing tilts forward due to a load created by the conveyor belt and thus rises rearward, the piston of the front hydraulic support cylinder is pulled down. Hydraulic fluid is drawn from the hydraulic equalizing cylinder into the upper hydraulic area of the front hydraulic support cylinder. Hydraulic fluid is also drawn from the lower hydraulic section of the rear hydraulic stabilizer cylinder into the upper hydraulic section of the hydraulic balancing cylinder for compensation. The piston of the rear hydraulic support cylinder moves downwards. As a result, the cutting wheel housing is pulled down again at the top rear, whereby the cutting wheel housing is lifted again at the front.

Die oben beschriebene, verwendete, geschlossene Hydraulikzylinderanordnung wirkt somit selbstnivellierend. Hierdurch werden das Fräsradgehäuse und auch die Fräsradtiefenverstellung des Fräsrades stets in waagerechter Position gehalten, trotz des zusätzlichen Anbaugewichtes durch das Förderband und darauf aufliegendem bzw. gefördertem Material.The closed hydraulic cylinder arrangement used and described above thus has a self-leveling effect. As a result, the cutting wheel housing and also the cutting wheel depth adjustment of the cutting wheel are always held in a horizontal position, despite the additional add-on weight caused by the conveyor belt and the material lying on it or being conveyed.

Entsprechend ist es mit der erfindungsgemäßen Fräsanlage im Vergleich zum Stand der Technik möglich, ein längeres Förderband mit entsprechend größerem Gewicht nahe an dem Fräsrad an dem Fräsradgehäuse vorzusehen, um hierdurch beispielsweise auch die Distanz und den Höhenunterschied zu einem vorausfahrenden Lastkraftwagen überbrücken und diesen mit dem Fräsgut direkt durch das Förderband beladen zu können.Accordingly, it is possible with the milling system according to the invention compared to the prior art to provide a longer conveyor belt with a correspondingly greater weight close to the milling wheel on the milling wheel housing, in order to bridge the distance and the difference in height to a truck driving in front, for example, and to load it with the milled material to be loaded directly by the conveyor belt.

Günstig ist es, wenn an dem Vorderhydraulikstützzylinder und an dem Hinterhydraulikstützzylinder Entlüfter vorgesehen sind.It is favorable if vents are provided on the front hydraulic support cylinder and on the rear hydraulic support cylinder.

In einer bevorzugten Ausführungsform der Erfindung ist das Förderband wenigstens 3 m lang, besonders bevorzugt wenigstens 3,50 m lang. Eine solche Länge ist ausreichend, um einen Lastkraftwagen direkt mit dem Förderband mit dem Fräsgut befüllen zu können.In a preferred embodiment of the invention, the conveyor belt is at least 3 m long, particularly preferably at least 3.50 m long. Such a length is sufficient to be able to fill a truck directly with the conveyor belt with the milled material.

Vorzugsweise ist ein Fördergurt des Förderbandes wenigstens 25 cm breit, besonders bevorzugt wenigstens 30 cm breit. Mit einer solchen Fördergurtbreite kann das beim Fräsen entstehende Fräsgut effizient aufgenommen und abgeführt werden.A conveyor belt of the conveyor belt is preferably at least 25 cm wide, particularly preferably at least 30 cm wide. With such a conveyor belt width, the milled material produced during milling can be picked up and removed efficiently.

In einer bevorzugten Ausgestaltung der erfindungsgemäßen Fräsanlage ist das Förderband schwenkbar an dem Fräsradgehäuse montiert und von der Arbeitsstellung der Fräsanlage, in der sich ein hinteres Ende des Förderbandes an dem Auswurffenster befindet, in eine Halte- oder Transportstellung der Fräsanlage, in der das Förderband an einer Halteseite des Fräsradgehäuses gehalten wird, und umgekehrt schwenkbar. Dies erleichtert die Manövrierbarkeit der Fräsanlage und spart Platz, wenn die Fräsanlage nicht in Benutzung ist.In a preferred embodiment of the milling system according to the invention, the conveyor belt is pivotably mounted on the milling wheel housing and can be moved from the working position of the milling system, in which a rear end of the conveyor belt is located at the ejection window, to a holding or transport position of the milling system, in which the conveyor belt is at a Holding side of the cutting wheel housing is held, and pivoted vice versa. This facilitates the maneuverability of the milling system and saves space when the milling system is not in use.

Dabei ist es von Vorteil, wenn die Fräsanlage so aufgebaut ist, dass an der Halteseite des Fräsradgehäuses eine an dem Fräsradgehäuse montierte, horizontal ausgerichtete Transportstütze für das Förderband seitlich hinausragt. Auf diese Transportstütze kann das Förderband in der Halte- oder Transportstellung der Fräsanlage aufgelegt und an dieser gesichert werden.It is advantageous if the milling system is constructed in such a way that a horizontally aligned transport support for the conveyor belt, which is mounted on the milling wheel housing, protrudes laterally on the holding side of the milling wheel housing. The conveyor belt can be placed on this transport support in the holding or transport position of the milling system and secured to it.

Um das Förderband geeignet von seiner Ausrichtung in der Arbeitsstellung der Fräsanlage in seine Ausrichtung in der Halte- oder Transportstellung überführen und darüber hinaus die Höhe und damit die Neigung des Förderbandes in der Arbeitsstellung einstellen zu können, ist in einer bevorzugten Ausbildung der erfindungsgemäßen Fräsanlage an dem Fräsradgehäuse eine horizontal schwenkbare, mit dem Förderband verbundene Dreh-Schwenkeinrichtung mit einem daran befestigten ein- und ausfahrbaren Neigungsverstellzylinder für das Förderband vorgesehen. Wenn der Neigungsverstellzylinder ausfährt, wird das Förderband abgesenkt, wenn er einfährt, wird die Neigung des Förderbandes steiler. Dadurch kann die Höhe des Abwurfendes des Förderbandes beispielsweise optimal an die Höhe einer Verladefläche eines Lastkraftwagens angepasst werden.In order to transfer the conveyor belt from its orientation in the working position of the milling system to its orientation in the holding or transport position and also to be able to adjust the height and thus the inclination of the conveyor belt in the working position, in a preferred embodiment of the milling system according to the invention, Milling wheel housing is provided with a horizontally pivotable rotary pivot device connected to the conveyor belt, with a retractable and extendable tilt adjustment cylinder attached to it for the conveyor belt. When the incline cylinder extends, the conveyor belt is lowered, when it retracts, the incline of the conveyor belt becomes steeper. As a result, the height of the discharge end of the conveyor belt can be optimally adapted to the height of a loading area of a truck, for example.

Vorzugsweise ist der Neigungswinkel des Förderbandes hydraulisch von einer Fahrerkabine des Trägerfahrzeuges aus einstellbar. Hierdurch ist es möglich, dass das Fräsgut von dem Förderband gezielt auf Lastkraftwagen unterschiedlicher Ladehöhe abzuwerfen, wobei die Ladekapazität der Ladefläche des jeweiligen Lastkraftwagens voll ausgenutzt werden kann.Preferably, the angle of inclination of the conveyor belt can be adjusted hydraulically from a driver's cab of the carrier vehicle. This makes it possible for the milled material to be thrown off the conveyor belt in a targeted manner onto trucks with different loading heights, whereby the loading capacity of the loading area of the respective truck can be fully utilized.

Bevorzugt lässt sich der Neigungs- oder Anstellwinkel des Förderbandes mit Hilfe des Neigungsverstellzylinders in einem Bereich von 0° bis 30°, besonders bevorzugt in einem Bereich von 0° bis 45° einstellen.The inclination or setting angle of the conveyor belt can preferably be adjusted with the aid of the inclination adjustment cylinder in a range from 0° to 30°, particularly preferably in a range from 0° to 45°.

Zur Ansteuerung des Neigungsverstellzylinders kann der gleiche Hydraulikantrieb wie zur Justierung des Fräsrades genutzt werden. Hierfür weist die Fräsanlage dann vorteilhafterweise ein von dem Trägerfahrzeug aus beispielsweise über einen Joystick elektrisch steuer- und umschaltbares, in die Hydraulikversorgung des Neigungsverstellzylinders und des Fräsradantriebes eingebundenes Hydraulikventil auf.The same hydraulic drive can be used to control the inclination adjustment cylinder as for adjusting the milling wheel. For this purpose, the milling system then advantageously has a hydraulic valve that can be electrically controlled and switched over from the carrier vehicle, for example via a joystick, and is integrated into the hydraulic supply of the inclination adjustment cylinder and the milling wheel drive.

In zweckmäßigen Ausbildungen der Erfindung ist der Neigungsverstellzylinder mit beiden Längstragprofilen des Förderbandes verbunden. Dies verhindert eine Verdrehung des Transportbandes. Hierfür kann beispielsweise an einem dem Förderband zugewandten Ende des Neigungsverstellzylinders eine U-förmige Gabel vorgesehen sein, die das Förderband von oben umgreift, wobei die Seitenstreben des U an den Längstragprofilen des Förderbandes befestigt sind.In expedient embodiments of the invention, the inclination adjustment cylinder is connected to both longitudinal support profiles of the conveyor belt. This prevents twisting of the conveyor belt. For this purpose, for example, a U-shaped fork can be provided at one end of the inclination adjustment cylinder facing the conveyor belt, which grips the conveyor belt from above, the side struts of the U being fastened to the longitudinal support profiles of the conveyor belt.

Vorzugsweise ist der Neigungsverstellzylinder an einem in der Arbeitsstellung der Fräsanlage vertikal ausgerichteten Halteständerprofil der Dreh-Schwenkeinrichtung montiert und an diesem verschwenkbar. Das vertikal ausgerichtete Halteständerprofil bildet mit dem Neigungsverstellzylinder in der Arbeitsstellung der Fräsanlage vorzugsweise einen rechten Winkel. Durch die Höhe des Halteständerprofils kann auch eine geeignete Höhe oder Neigung des Transportbandes eingestellt werden. Mittels der Dreh-Schwenkeinrichtung und dem daran vorgesehenen Neigungsverstellzylinder wird das Transportband stets sicher gehalten, wobei darüber hinaus die Neigung des Transportbandes auch während des Verschwenkens des Transportbandes aus der Arbeitsstellung in eine Halte- oder Transportstellung geeignet geändert werden kann.Preferably, the inclination adjustment cylinder is mounted on a holding column profile of the rotating/pivoting device that is vertically aligned when the milling system is in the working position, and can be pivoted on it. The vertically aligned support stand profile preferably forms a right angle with the inclination adjustment cylinder in the working position of the milling system. A suitable height or inclination of the conveyor belt can also be set by the height of the support stand profile. The conveyor belt is always held securely by means of the rotating/pivoting device and the inclination adjustment cylinder provided thereon, and the inclination of the conveyor belt can also be suitably changed during the pivoting of the conveyor belt from the working position into a holding or transport position.

In einer praktikablen Ausgestaltung der erfindungsgemäßen Fräsanlage ist das Halteständerprofil über eine Haltewinkelprofilkonstruktion mit einem um seine Längsachse drehbaren, in der Arbeitsstellung der Fräsanlage vertikal ausgerichteten Schwenkständerprofil verbunden. Durch die Haltewinkelprofilkonstruktion kann das Halteständerprofil relativ zu dem Förderband mittig positioniert werden, sodass das Förderband verdrehungssicher gehalten werden kann, obwohl das Schwenkständerprofil selbst außermittig des Förderbandes an der Seite der Fräsanlage angebracht ist.In a practicable embodiment of the milling system according to the invention, the holding stand profile is connected via a holding angle profile construction to a pivoting stand profile which can be rotated about its longitudinal axis and is vertically aligned in the working position of the milling plant. Due to the bracket profile construction, the support stand profile be positioned centrally relative to the conveyor belt, so that the conveyor belt can be held against rotation, although the swivel stand profile itself is attached off-centre to the conveyor belt on the side of the milling system.

In einer vorteilhaften Ausführungsform der erfindungsgemäßen Fräsanlage ist an dem Schwenkständerprofil ein(e) um die Rückseite eines unteren Endes des Förderbandes geführte(r) und um das Schwenkständerprofil verschwenkbare(r) Stützwinkelprofilkonstruktion oder Stützbügel vorgesehen. Dadurch wird das Förderband insbesondere unterhalb des Auswurffensters geeignet gestützt.In an advantageous embodiment of the milling system according to the invention, a support angle profile construction or support bracket is provided on the swivel stand profile which is guided around the rear side of a lower end of the conveyor belt and can be swiveled around the swivel stand profile. As a result, the conveyor belt is suitably supported, in particular below the ejection window.

Besonders günstig ist es, wenn in einer Ausbildung der erfindungsgemäßen Fräsanlage zwischen dem Neigungsverstellzylinder und dem Förderband eine Knicksicherung vorgesehen ist. Die Knicksicherung kann beispielsweise in Form eines Sicherheits-Knickgestänges ausgebildet sein. Die Knicksicherung erhöht die Sicherheit der Halterung des Förderbandes, was beispielsweise von Vorteil ist, wenn das Förderband gegen ein Hindernis gefahren wird.It is particularly favorable if, in one embodiment of the milling system according to the invention, a buckling safety device is provided between the inclination adjustment cylinder and the conveyor belt. The buckling protection can be designed, for example, in the form of a safety buckling linkage. The kink protection increases the safety of the conveyor belt's mounting, which is advantageous, for example, if the conveyor belt is driven against an obstacle.

An einer Ausführungsform der erfindungsgemäßen Fräsanlage ist innerhalb des Fräsradgehäuses, vor und oberhalb des Fräsrades ein in der Vorwärtsfahrtrichtung ausgerichteter Auswurfkeil oder -zahn vorgesehen, dessen Unterseite einen Winkel zu der Bodenoberfläche bildet. Die Unterseite des Auswurfkeils oder -zahns kann gerade oder konkav ausgebildet sein. Durch den Winkel des Auswurfkeils oder -zahns wird das ausgefräste Material bevorzugt in Richtung des Förderbandes gelenkt und nicht vom Fräsrad in seiner Drehbewegung mitgenommen. Der Auswurf erfolgt also nach vorn.In one embodiment of the cutting system according to the invention, an ejection wedge or tooth is provided within the cutting wheel housing, in front of and above the cutting wheel, which is aligned in the forward direction of travel and whose underside forms an angle with the ground surface. The underside of the ejector wedge or tooth may be straight or concave. Due to the angle of the ejection wedge or tooth, the milled material is preferably directed in the direction of the conveyor belt and is not carried along by the milling wheel in its rotary movement. The ejection is therefore forward.

Vorteile bei der Materialförderung auf dem Förderband ergeben sich, wenn auf einem Fördergurt des Förderbandes aufrecht ausgerichtete, quer zur Förderrichtung des Förderbandes verlaufende Förderstollen aus flexiblem Material vorgesehen sind. Die Förderstollen können beispielsweise eine Höhe von 3 bis 5 cm, vorzugsweise von 4 cm aufweisen. Vorzugsweise bestehen die Förderstollen aus Gummi oder PVC-Gewebeband. Die Förderstollen können beispielsweise auf den Fördergurt aufvulkanisiert sein. Mit Hilfe der Förderstollen kann die Wurfweite des Förderbandes im Vergleich zur Verwendung eines Fördergurtes ohne solche Förderstollen erweitert werden.Advantages in the conveying of material on the conveyor belt result when conveying cleats made of flexible material are provided on a conveyor belt of the conveyor belt and run perpendicularly to the conveying direction of the conveyor belt. The conveyor tunnels can have a height of 3 to 5 cm, preferably 4 cm. The conveyor lugs are preferably made of rubber or PVC fabric belt. The conveyor cleats can, for example, be vulcanized onto the conveyor belt. With the aid of the conveyor cleats, the throwing distance of the conveyor belt can be extended in comparison to using a conveyor belt without such conveyor cleats.

Ein erhöhter Unfall- und Staubschutz kann dadurch realisiert werden, dass das Förderband auf seiner Rückseite eine Abdeckung aufweist. Hierdurch wird beispielsweise erreicht, dass keiner im Betrieb der Fräsanlage mit auf dem Fördergut vorgesehenen Förderstollen in Berührung kommt und niemand in das laufende Förderband eingreifen kann.Increased protection against accidents and dust can be achieved by the conveyor belt having a cover on its back. This ensures, for example, that no one comes into contact with the conveyor cleats provided on the conveyed goods during operation of the milling system and no one can intervene in the running conveyor belt.

In einer weiteren Ausführungsform der erfindungsgemäßen Fräsanlage ist in einem dem Auswurffenster gegenüber befindlichen, hinteren Bereich des Fräsradgehäuses wenigstens eine Öffnung vorgesehen. Die Öffnung kann grundsätzlich durch eine Klappe verschlossen oder verschließbar sein. Während des Betriebs der Fräsanlage wird diese Öffnung jedoch vorzugsweise offen gehalten. Dadurch ergibt sich ein Sog nach hinten, wodurch ein seitliches Herausfallen von Material aus dem Fräsradgehäuse vermieden oder zumindest stark verringert werden kann.In a further embodiment of the milling system according to the invention, at least one opening is provided in a rear area of the milling wheel housing opposite the ejection window. In principle, the opening can be closed or closable by a flap. However, this opening is preferably kept open during operation of the milling system. This results in a backwards suction, whereby material falling out of the cutting wheel housing at the side can be avoided or at least greatly reduced.

In typischen Ausbildungen der erfindungsgemäßen Fräsanlage ist das Trägerfahrzeug ein Raupen- oder Kettenfahrzeug. Dadurch ergibt sich eine besonders hohe Kippsicherheit der Fräsanlage. Grundsätzlich ist es jedoch auch möglich, dass das Trägerfahrzeug Räder aufweist.In typical configurations of the milling system according to the invention, the carrier vehicle is a caterpillar or tracked vehicle. This results in a particularly high tipping safety of the milling system. In principle, however, it is also possible for the carrier vehicle to have wheels.

Vorzugsweise ist an dem Auswurffenster eine über dem Förderband geöffnete Auswurfhaube angebracht. Die Auswurfhaube verlängert den Auswurfkanal, sodass das Fräsgut vorteilhaft auf das Förderband fallen kann. Die Auswurfhaube weist vorzugsweise eine sich in Richtung des Förderbandes erstreckende Aufwurfhaubendecke und damit verbundene oder einstückig damit ausgebildete, sich nach vorn und oben verjüngende Auswurfhaubenseiten auf. Die Auswurfhaubenseiten wirken als seitliche Abstreifer.Preferably, an ejection hood open over the conveyor belt is attached to the ejection window. The ejection hood extends the ejection channel so that the milled material can fall onto the conveyor belt. The chute preferably includes a chute roof extending in the direction of the conveyor belt and associated or integral therewith, forwardly and upwardly tapering chute sides. The discharge hood sides act as side scrapers.

Die Auswurfhaube ist in praktischen Ausgestaltungen der vorliegenden Erfindung aus Gummi ausgebildet.In practical embodiments of the present invention, the discharge hood is made of rubber.

Es ist ferner von Vorteil, wenn vor einem vorderen Ende des Förderbandes eine Abwurfklappe aus flexiblem Material vorgesehen ist. Die Abwurfklappe kann beispielsweise in einem Abstand von 20 bis 40 cm vor dem vorderen Ende des Förderbandes vorgesehen sein. Hierzu kann die Abwurfklappe beispielsweise an zwei, jeweils an den beiden Längstragprofilen des Förderbandes befestigten Distanzstreben aufgehängt sein. Die Abwurfklappe kann beispielsweise aus Gummi ausgebildet sein. Durch die Abwurfklappe wird die Abwurfrichtung des Förderbandes auf eine Abwurffläche, wie beispielsweise eine Ladefläche eines Lastkraftwagens, umgelenkt.It is also advantageous if a discharge flap made of flexible material is provided in front of a front end of the conveyor belt. The discharge flap can be provided, for example, at a distance of 20 to 40 cm in front of the front end of the conveyor belt. For this purpose, the discharge flap can be suspended, for example, on two spacer struts each fastened to the two longitudinal support profiles of the conveyor belt. The discharge flap can be made of rubber, for example. Through the ejection flap the discharge direction of the conveyor belt is deflected onto a discharge area, such as a loading area of a truck.

Vorzugsweise ist der Hydraulikausgleichszylinder in der Arbeitsstellung der Fräsanlage schräg ausgerichtet zwischen dem Vorder- und dem Hinterhydraulikstützzylinder vorgesehen. So kann der Hydraulikausgleichszylinder, der länger als der Vorder- und der Hinterhydraulikstützzylinder ausgebildet sein kann, mit den daran angebundenen Hydraulikschläuchen gut in dem sowieso vorhandenen Zwischenraum zwischen dem Vorder- und dem Hinterhydraulikstützzylinder untergebracht werden.In the working position of the milling machine, the hydraulic compensating cylinder is preferably provided at an angle between the front and rear hydraulic support cylinders. In this way, the hydraulic compensating cylinder, which can be longer than the front and rear hydraulic support cylinders, can be easily accommodated with the hydraulic hoses connected to it in the space between the front and rear hydraulic support cylinders that is present anyway.

Trotz der erfindungsgemäß verwendeten Hydraulikzylinderanordnung ist es insbesondere zur Erhöhung der Kippsicherheit des Trägerfahrzeuges sinnvoll, wenn das Förderband möglichst leicht ausgebildet ist. Entsprechend sind in einer vorteilhaften Ausführungsform der Erfindung die Längstragprofile, die Antriebsrolle und die Umlenkrolle des Förderbandes aus Aluminium ausgebildet. Das Förderbandgrundgestell kann beispielsweise aus Aluminiumpressdruckelementen gefertigt sein. Die Ausbildung der Förderbandelemente aus Aluminium führt neben der Gewichtseinsparung zusätzlich noch zu einer hohen Elastizität des Förderbandes bei gleichzeitig hoher Tragfähigkeit.Despite the hydraulic cylinder arrangement used according to the invention, it makes sense, in particular to increase the security against tipping of the carrier vehicle, if the conveyor belt is made as light as possible. Correspondingly, in an advantageous embodiment of the invention, the longitudinal support profiles, the drive roller and the deflection roller of the conveyor belt are made of aluminum. The conveyor belt base frame can be made, for example, from aluminum press-compression elements. In addition to saving weight, the design of the conveyor belt elements from aluminum also results in a high elasticity of the conveyor belt with a high load-bearing capacity at the same time.

Um ein geringes Gewicht des Förderbandes zu erreichen, ist es auch günstig, wenn die Antriebsrolle und die Umlenkrolle des Förderbandes einen geringen Durchmesser, beispielsweise einen Durchmesser von 8 bis 15 cm, aufweisen.In order to achieve a low weight of the conveyor belt, it is also advantageous if the drive roller and the deflection roller of the conveyor belt have a small diameter, for example a diameter of 8 to 15 cm.

Eine weitere Gewichtseinsparung ergibt sich beim Förderband, wenn der Fördergurt des Förderbandes aus PVC-Gewebeband ausgebildet ist. das PVC-Gewebeband ist flexibel, kann vorteilhaft auch bei kleineren Durchmessern von Antriebs- und Umlenkrolle des Förderbandes eingesetzt werden und ist hochbelastbar.A further weight saving results from the conveyor belt if the conveyor belt of the conveyor belt is made of PVC fabric belt. the PVC fabric belt is flexible, can also be used to advantage with smaller diameters of the drive and deflection rollers of the conveyor belt and is highly resilient.

Ein optimaler Abwurf von Fräsgut auf das Förderband zeigt sich, wenn das Förderband in der Arbeitsstellung der Fräsanlage einen Abstand zum Fräsrad von höchstens 40 mm aufweist.An optimal discharge of milled material onto the conveyor belt is shown when the conveyor belt has a maximum distance of 40 mm to the milling wheel when the milling system is in the working position.

In einer vorteilhaften Weiterbildung der erfindungsgemäßen Fräsanlage weist das Förderband einen Hydraulikantrieb auf, der in eine Antriebshydraulik des Trägerfahrzeuges eingebunden ist. Um dies zu realisieren, kann der Förderbandantrieb über einen Hydraulikanschluss direkt aus dem Trägerfahrzeug mit unter entsprechendem Druck stehender Hydraulikflüssigkeit versorgt werden. In diesem Fall kann die Fördergeschwindigkeit des Förderbandes beispielsweise mit einem von der Fahrerkabine des Trägerfahrzeuges aus elektronisch angesteuerten Hydraulikventil geregelt werden. So kann ein Fahrer des Trägerfahrzeuges während des Betriebs der Fräsanlage beispielsweise über einen elektronischen Drehzahlregler von seinem Platz aus die Fördergeschwindigkeit des Förderbandes steuern. Damit werden auch die Auswurfweite und die Auswurfmenge geregelt sowie der Abwurfort bestimmt.In an advantageous development of the milling system according to the invention, the conveyor belt has a hydraulic drive which is integrated into a drive hydraulic system of the carrier vehicle. In order to achieve this, the conveyor belt drive can be connected via a hydraulic connection be supplied directly from the carrier vehicle with hydraulic fluid under the appropriate pressure. In this case, the conveying speed of the conveyor belt can be regulated, for example, with a hydraulic valve that is electronically controlled from the driver's cab of the carrier vehicle. For example, a driver of the carrier vehicle can control the conveying speed of the conveyor belt from his seat during operation of the milling system, for example via an electronic speed controller. This also regulates the ejection distance and the ejection quantity and determines the ejection location.

Eine bevorzugte Ausführungsform der erfindungsgemäßen Fräsanlage, deren Aufbau, Funktion und Vorteile wird im Folgenden anhand von Figuren näher erläutert, wobei

Figur 1
schematisch eine Ausführungsform einer erfindungsgemäßen Fräsanlage in einer Seitenansicht von links zeigt;
Figur 2
schematisch den Grundaufbau einer Hydraulikzylinderanordnung einer erfindungsgemäßen Fräsanlage zeigt;
Figur 3
schematisch die Fräsanlage aus Figur 1 in einer Seitenansicht von rechts zeigt;
Figur 4
schematisch eine Fräsvorrichtung mit einem daran vorgesehenen Förderband der Fräsanlage der Figuren 1 und 3 in einer perspektivischen Ansicht in einer Halte- und Transportstellung der Fräsanlage zeigt; und
Figur 5
schematisch die Fräsvorrichtung mit dem daran vorgesehenen Förderband aus Figur 4 in einer Draufsicht zeigt.
A preferred embodiment of the milling system according to the invention, its structure, function and advantages is explained in more detail below with reference to figures, where
figure 1
schematically shows an embodiment of a milling system according to the invention in a side view from the left;
figure 2
schematically shows the basic structure of a hydraulic cylinder arrangement of a milling system according to the invention;
figure 3
schematic of the milling machine figure 1 shows in a side view from the right;
figure 4
schematically a milling device with a conveyor belt provided thereon of the milling system figures 1 and 3 shows in a perspective view in a holding and transport position of the milling system; and
figure 5
schematically shows the milling device with the conveyor belt provided on it figure 4 shows in a plan view.

Figur 1 zeigt schematisch eine Ausführungsform einer erfindungsgemäßen Fräsanlage 1 in einer Seitenansicht von links. figure 1 shows schematically an embodiment of a milling system 1 according to the invention in a side view from the left.

Die Fräsanlage 1 dient einem Einbringen eines Verlegungsschlitzes in eine Bodenoberfläche 10.The milling system 1 is used to make a laying slot in a ground surface 10.

Die Fräsanlage 1 weist ein Trägerfahrzeug 2, eine Fräsvorrichtung 3 und ein daran vorgesehenes Förderband 7 auf.The milling system 1 has a carrier vehicle 2, a milling device 3 and a conveyor belt 7 provided thereon.

Das Trägerfahrzeug 2 ist ein Raupen- oder Kettenfahrzeug. Das Trägerfahrzeug 2 weist eine Fahrerkabine 21 auf, in welcher ein Fahrer Platz nehmen und das Trägerfahrzeug 2 als auch die Fräsvorrichtung 3 und das Förderband 7 bedienen kann.The carrier vehicle 2 is a caterpillar or tracked vehicle. The carrier vehicle 2 has a driver's cab 21 in which a driver can sit and operate the carrier vehicle 2 as well as the milling device 3 and the conveyor belt 7 .

Das Trägerfahrzeug 2 weist in dem gezeigten Ausführungsbeispiel einen Hydraulikantrieb auf.In the exemplary embodiment shown, the carrier vehicle 2 has a hydraulic drive.

Die Fräsvorrichtung 3 ist frontseitig des Trägerfahrzeuges 2, also in der Vorwärtsfahrtrichtung V vor dem Trägerfahrzeug 2, angeordnet und mit dem Trägerfahrzeug 2 verbunden. Die Fräsvorrichtung 3 bewegt sich durch das Fahren des Trägerfahrzeuges 2 in der Vorwärtsfahrtrichtung V ebenfalls in der Vorwärtsfahrtrichtung V.The milling device 3 is arranged at the front of the carrier vehicle 2 , ie in front of the carrier vehicle 2 in the forward travel direction V, and is connected to the carrier vehicle 2 . The milling device 3 also moves in the forward direction V when the carrier vehicle 2 is driving in the forward direction V.

Die Fräsvorrichtung 3 weist ein Fräsrad 4 auf. An einem Umfang des Fräsrades 4 sind in unterschiedlichen Richtungen auskragende Fräszähne 42 vorgesehen. Einige dieser Fräszähne 42 sind beispielhaft in Figur 3 gezeigt, in welcher die Fräsanlage 1 aus Figur 1 schematisch in einer Seitenansicht von rechts dargestellt ist.The milling device 3 has a milling wheel 4 . On a circumference of the cutting wheel 4, cutting teeth 42 are provided which protrude in different directions. Some of these cutting teeth 42 are shown in figure 3 shown in which the milling system 1 from figure 1 is shown schematically in a side view from the right.

Im Betrieb der Fräsanlage 1 dreht sich das Fräsrad 4 um seiner Drehachse A in einer Drehrichtung D, also in Figur 1 in Uhrzeigerrichtung. Durch diese Drehung greifen die Fräszähne 42 in die Bodenoberfläche 10 ein und fräsen dabei den Verlegeschlitz in die Bodenoberfläche 10 hinein. Das dabei abgetragene Material wird im Folgenden als Fräsgut bezeichnet. Das Fräsgut wird zunächst von den Fräszähnen 42 in der Drehrichtung D mitgenommen.When the milling system 1 is in operation, the milling wheel 4 rotates about its axis of rotation A in a direction of rotation D, i.e. in figure 1 in clockwise direction. Due to this rotation, the milling teeth 42 engage in the soil surface 10 and thereby mill the laying slot into the soil surface 10 . The material removed in the process is referred to below as milled material. The milled material is first taken along in the direction of rotation D by the milling teeth 42 .

Die Fräsvorrichtung 2 weist ferner um einen oberen und mittleren Bereich des Fräsrades 4 ein Fräsradgehäuse 6 auf.The milling device 2 also has a milling wheel housing 6 around an upper and middle region of the milling wheel 4 .

In einem Frontbereich des Fräsradgehäuses 6 ist ein Auswurffenster 61 vorgesehen. As Auswurffenster 61 befindet sich oberhalb des Förderbandes 7. Ein sich direkt über einem hinteren Ende 72 des Förderbandes 7 befindlicher Bereich des Fräsradgehäuses 6 ist geschlossen, sodass hier das Fräsgut noch nicht auf das Förderband 7 fallen kann. So kann durch das weiter oben angeordnete Auswurffenster auf das Förderband 7 ausgeworfenes Fräsgut auf dem Förderband 7 von oben nach unten rollen und wird trotzdem im weiteren Verlauf gut abtransportiert.In a front portion of the cutting wheel housing 6, an ejection window 61 is provided. The ejection window 61 is located above the conveyor belt 7. A region of the milling wheel housing 6 located directly above a rear end 72 of the conveyor belt 7 is closed, so that the milled material cannot fall onto the conveyor belt 7 here. Milled material ejected through the ejection window arranged further up onto the conveyor belt 7 can thus roll from top to bottom on the conveyor belt 7 and is nevertheless transported away easily in the further course.

Oberhalb und seitlich des Auswurffensters 61 ist in dem gezeigten Ausführungsbeispiel eine Auswurfhaube 66 angebracht. Unter der Auswurfhaube 66 ist an dem Auswurffenster 61 ein Abstreifer vorgesehen.In the exemplary embodiment shown, an ejection hood 66 is attached above and to the side of the ejection window 61 . A scraper is provided on the ejection window 61 under the ejection hood 66 .

Dem Auswurffenster 61 gegenüber ist in einem hinteren Bereich 65 des Fräsradgehäuses 6 wenigstens eine Öffnung vorgesehen. Dadurch entsteht eine Sogwirkung, infolge welcher das Fräsgut vorrangig in der Drehrichtung D des Fräsrades 4 abgefördert wird und nur wenig bis gar nicht zur Seite herunterfällt.At least one opening is provided in a rear area 65 of the cutting wheel housing 6 opposite the ejection window 61 . This creates a suction effect, as a result of which the milled material is conveyed away primarily in the direction of rotation D of the milling wheel 4 and only slightly or not at all falls to the side.

An einer Seite des Fräsradgehäuses 6 ist eine Hydraulikzylinderanordnung 8 vorgesehen. Die Hydraulikzylinderanordnung 8 ist einzeln in Figur 2 schematisch dargestellt.A hydraulic cylinder arrangement 8 is provided on one side of the cutting wheel housing 6 . The hydraulic cylinder assembly 8 is individually in figure 2 shown schematically.

Die Hydraulikzylinderanordnung 8 weist einen Vorderhydraulikstützzylinder 81, einen Hydraulikausgleichszylinder 82 und einen Hinterhydraulikstützzylinder 83 auf. Der Vorderhydraulikstützzylinder 81 ist in der Vorwärtsfahrtrichtung V vor der Drehachse A des Fräsrades 4 vorgesehen. Er ist in der Arbeitsstellung der Fräsanlage 1 vertikal ausgerichtet. Der Vorderhydraulikstützzylinder 81 weist einen nach unten ausfahrbaren Kolben 88 auf. Der Hydraulikausgleichszylinder 82 ist mit einem oben vorgesehenen Hydraulikbereich 811 des Vorderhydraulikstützzylinders 81 mittels einer Hydraulikleitung 84 verbunden. Der Hinterhydraulikstützzylinder 83 ist in der Vorwärtsfahrtrichtung V der Fräsanlage 1 hinter der Drehachse A des Fräsrades 4 vorgesehen. Er ist in der Arbeitsstellung der Fräsanlage 1 vertikal ausgerichtet. Der Hinterhydraulikstützzylinder 83 weist einen nach oben ausfahrbaren Kolben 89 auf. Ein unten angeordneter Hydraulikbereich 831 des Hinterhydraulikstützzylinders 83 ist über eine Hydraulikleitung 85 mit dem Hydraulikausgleichszylinder 82 verbunden.The hydraulic cylinder arrangement 8 has a front hydraulic support cylinder 81 , a hydraulic balancing cylinder 82 and a rear hydraulic support cylinder 83 . The front hydraulic support cylinder 81 is provided in front of the axis of rotation A of the cutting wheel 4 in the forward travel direction V. In the working position of the milling machine 1, it is aligned vertically. The front hydraulic support cylinder 81 has a piston 88 which can be extended downwards. The hydraulic balance cylinder 82 is connected to an upper hydraulic section 811 of the front hydraulic support cylinder 81 via a hydraulic line 84 . The rear hydraulic support cylinder 83 is provided in the forward travel direction V of the milling machine 1 behind the axis of rotation A of the milling wheel 4 . In the working position of the milling machine 1, it is aligned vertically. The rear hydraulic support cylinder 83 has a piston 89 that can be extended upwards. A hydraulic section 831 of the rear hydraulic support cylinder 83 arranged at the bottom is connected to the hydraulic compensating cylinder 82 via a hydraulic line 85 .

In der in den Figuren 1 bis 5 gezeigten Ausführungsform ist der Hydraulikausgleichszylinder 82 in der Arbeitsstellung parallel zu dem Vorderhydraulikstützzylinder 81 und dem Hinterhydraulikstützzylinder 83 ausgerichtet. In bestimmten, nicht gezeigten Ausführungsformen der vorliegenden Erfindung kann der Hydraulikausgleichszylinder 82 auch schräg ausgerichtet zwischen dem Vorder- und dem Hinterhydraulikstützzylinder 81, 83 vorgesehen sein.In the in the Figures 1 to 5 In the embodiment shown, the hydraulic compensating cylinder 82 is aligned parallel to the front hydraulic support cylinder 81 and the rear hydraulic support cylinder 83 in the working position. In certain non-illustrated embodiments of the present invention, the hydraulic compensating cylinder 82 can also be provided in an obliquely aligned manner between the front and rear hydraulic support cylinders 81, 83.

An dem Vorderhydraulikstützzylinder 81 und an dem Hinterhydraulikstützzylinder 83 sind jeweils Entlüfter 86, 87 vorgesehen.Bleeders 86, 87 are provided on the front hydraulic support cylinder 81 and on the rear hydraulic support cylinder 83, respectively.

Wenn sich das Fräsradgehäuse 6 infolge einer durch das Förderband 7 ausgebildeten Last nach vorn neigt und somit hinten hebt, wird der Kolben 88 des Vorderhydraulikstützzylinders 81 nach unten gezogen. Dabei wird Hydraulikflüssigkeit aus einem unteren Hydraulikbereich 821 des Hydraulikausgleichszylinders 82 in den oberen Hydraulikbereich 811 des Vorderhydraulikstützzylinders 81 gezogen. Ferner wird Hydraulikflüssigkeit zum Ausgleich aus dem unten befindlichen Hydraulikbereich 831 des Hinterhydraulikstützzylinders 83 in den oberen Hydraulikbereich 822 des Hydraulikausgleichszylinders 82 gezogen. Dabei bewegt sich der Kolben 89 des Hinterhydraulikstützzylinders 83 nach unten. Dadurch wird das Fräsradgehäuse 6 oben hinten wieder nach unten gezogen, wodurch das Fräsradgehäuse 6 frontseitig wieder angehoben wird.When the cutting wheel housing 6 inclines forward due to a load developed by the conveyor belt 7 and thus rises rearward, the piston 88 of the front hydraulic support cylinder 81 is pulled down. In doing so, hydraulic fluid is drawn from a lower hydraulic area 821 of the hydraulic compensating cylinder 82 into the upper hydraulic area 811 of the front hydraulic support cylinder 81 . Furthermore, hydraulic fluid is drawn from the lower hydraulic section 831 of the rear hydraulic support cylinder 83 into the upper hydraulic section 822 of the hydraulic balancing cylinder 82 for compensation. The piston 89 of the rear hydraulic support cylinder 83 moves downwards. As a result, the cutting wheel housing 6 is pulled down again at the top rear, as a result of which the cutting wheel housing 6 is raised again at the front.

Das Fräsgut wird durch die Drehung des Fräsrades 4 durch das Auswurffenster 61 und die Auswurfhaube 66 auf das Förderband 7 geworfen.The milled material is thrown onto the conveyor belt 7 through the ejection window 61 and the ejection hood 66 by the rotation of the milling wheel 4 .

Innerhalb des Fräsradgehäuses 6 ist vor und oberhalb des Fräsrades 4 ein in der Vorwärtsfahrtrichtung V der Fräsanlage 1 ausgerichteter Auswurfkeil oder -zahn 63 vorgesehen, dessen Unterseite 64 einen spitzen Winkel a zu der Bodenoberfläche 10 bildet. Dadurch wird das Fräsgut ausgehend von dem Fräsrad 4 gerade nach vorn durch das Auswurffenster 61 und die Auswurfhaube 66 auf das Förderband 7 geworfen. Damit bleibt der gefräste Verlegeschlitz im Wesentlichen leer und es wird nur ganz wenig Fräsgut an einem an einer Seite des Fräsradgehäuses 6 vorgesehenen Notauswurf ausgeworfen.Inside the cutting wheel housing 6 in front of and above the cutting wheel 4 there is an ejection wedge or tooth 63 which is aligned in the forward travel direction V of the cutting system 1 and whose underside 64 forms an acute angle a to the ground surface 10 . As a result, the milled material is thrown straight forward from the milling wheel 4 through the ejection window 61 and the ejection hood 66 onto the conveyor belt 7 . The milled laying slot thus remains essentially empty and only very little milled material is ejected at an emergency ejection provided on one side of the milling wheel housing 6 .

Das Förderband 7 weist ein Förderbandgrundgestell mit zwei parallelen Längstragprofilen 73, 74 auf. An einem vorderen Ende 71 des Förderbandes 7 ist zwischen den Längstragprofilen 73, 74 eine quer zu den Längstragprofilen 73, 74 liegende Antriebsrolle 78 vorgesehen. Die Antriebsrolle 78 ist mit einem Hydraulikantrieb 5 gekoppelt. Der Hydraulikantrieb ist in dem gezeigten Ausführungsbeispiel ein Hydraulikmotor, der mit einer Halterung an die Antriebsrolle 78 angebaut ist. Dadurch ist die Rotationsgeschwindigkeit der Antriebsrolle 78 stufenlos ohne Kraftverlust verstellbar. Durch die stufenlose Geschwindigkeitsregelung kann die Wurfweite und die Transportmenge auf dem Förderband 7 als auch auf dem von dem Förderband 7 belieferten Lastkraftwagen oder Transportfahrzeug geregelt werden.The conveyor belt 7 has a conveyor belt base frame with two parallel longitudinal support profiles 73, 74. At a front end 71 of the conveyor belt 7, between the longitudinal support profiles 73, 74, a drive roller 78 lying transversely to the longitudinal support profiles 73, 74 is provided. The drive roller 78 is coupled to a hydraulic drive 5 . In the exemplary embodiment shown, the hydraulic drive is a hydraulic motor which is attached to the drive roller 78 with a bracket. As a result, the rotational speed of the drive roller 78 can be continuously adjusted without any loss of power. Due to the stepless speed control, the throw and the transport quantity on the conveyor belt 7 as can also be regulated on the truck or transport vehicle supplied by the conveyor belt 7.

In dem gezeigten Ausführungsbeispiel ist der Hydraulikantrieb 5 in eine Antriebshydraulik des Trägerfahrzeuges 2 eingebunden. An einem hinteren Ende 72 des Förderbandes 7 ist eine quer zu den Längstragprofilen 73, 74 liegende Umlenkrolle 79 vorgesehen. In dem gezeigten Ausführungsbeispiel bestehen das Förderbandgrundgestell, die Antriebsrolle 78 und die Umlenkrolle 79 aus Aluminium, können jedoch in anderen Ausführungsformen der vorliegenden Erfindung auch aus einem anderen, vorzugsweise leichten Material bestehen.In the exemplary embodiment shown, the hydraulic drive 5 is integrated into a drive hydraulic system of the carrier vehicle 2 . At a rear end 72 of the conveyor belt 7 is a transverse to the longitudinal support profiles 73, 74 lying deflection roller 79 is provided. In the exemplary embodiment shown, the conveyor belt base frame, the drive roller 78 and the deflection roller 79 are made of aluminum, but in other embodiments of the present invention they can also be made of another, preferably light-weight, material.

Zwischen den Längstragprofilen 73, 74 ist in Förderrichtung F des Förderbandes 7 ein um die Antriebsrolle 78 und die Umlenkrolle 79 umlaufender Fördergurt 75 vorgesehen. In der gezeigten Ausführungsform besteht der Fördergurt 75 aus PVC-Gewebeband, kann jedoch auch aus Gummi bestehen.A conveyor belt 75 circulating around the drive roller 78 and the deflection roller 79 is provided between the longitudinal support profiles 73 , 74 in the conveying direction F of the conveyor belt 7 . In the embodiment shown, the conveyor belt 75 is made of PVC fabric tape, but it can also be made of rubber.

Auf der Förderoberfläche des Fördergurtes 75, auf welcher das Fräsgut aufliegt und mittels des Förderbandes 7 abtransportiert wird, sind in dem dargestellten Ausführungsbeispiel voneinander in der Förderrichtung F beabstandete, nach oben ausgerichtete Förderstollen 76 aufgebracht. In dem gezeigten Beispiel bestehen die Förderstollen 76 aus Gummi. Ferner weisen die Förderstollen 76 in dem gezeigten Beispiel eine Höhe von 40 mm auf.On the conveying surface of the conveyor belt 75, on which the milled material rests and is transported away by means of the conveyor belt 7, conveying lugs 76, which are spaced apart from one another in the conveying direction F and directed upwards, are applied in the exemplary embodiment shown. In the example shown, the conveyor lugs 76 are made of rubber. Furthermore, the conveyor lugs 76 have a height of 40 mm in the example shown.

Unter dem Förderband 7 ist eine hier nicht gezeigte Abdeckung vorgesehen.A cover, not shown here, is provided under the conveyor belt 7 .

Das Förderband 7 weist in dem dargestellten Ausführungsbeispiel eine Länge von 3,5 m auf. Die Breite des Fördergurtes 75 beträgt in dem gezeigten Beispiel 35 cm.In the exemplary embodiment shown, the conveyor belt 7 has a length of 3.5 m. The width of the conveyor belt 75 is 35 cm in the example shown.

In dem gezeigten Ausführungsbeispiel ist das Förderband 7 in einem Abstand von 3,0 bis 3,5 cm zu dem Fräsrad 4 an der Fräsvorrichtung 3 montiert.In the exemplary embodiment shown, the conveyor belt 7 is mounted on the milling device 3 at a distance of 3.0 to 3.5 cm from the milling wheel 4 .

Das Förderband 7 wird an dem Fräsradgehäuse 6 mittels einer Dreh-Schwenkeinrichtung 9 gehalten. Mit Hilfe der Dreh-Schwenkeinrichtung 9 kann zudem das Förderband 7 aus der in den Figuren 1 und 3 gezeigten Arbeitsstellung der Fräsanlage 1 in eine in den Figuren 4 und 5 gezeigte Halte- und Transportstellung der Fräsanlage 1 und umgekehrt verbracht werden. Durch die Dreh-Schwenkeinrichtung 9 ist das fest an der Fräsvorrichtung 3 montierte Förderband 7 um 180 ° schwenkbar und hat in einem an die Seite der Fräsvorrichtung 3 eingeklappten Zustand eine Auflage durch eine Transportstütze 62.The conveyor belt 7 is held on the cutting wheel housing 6 by means of a rotating/pivoting device 9 . With the help of the rotary swivel device 9 can also the conveyor belt 7 from the figures 1 and 3 shown working position of the milling machine 1 in one of the figures 4 and 5 shown holding and transport position of the milling machine 1 and be spent in reverse. The conveyor belt 7, which is firmly mounted on the milling device 3, can be pivoted by 180° using the rotating/pivoting device 9 and, when it is folded onto the side of the milling device 3, is supported by a transport support 62.

Das Förderband 7 ist im Betrieb der Fräsanlage 1 an einer Frontseite der Fräsvorrichtung 3 befestigt. Dadurch ist die Dreh-Schwenkeinrichtung 9 im Betrieb der Fräsanlage 1 entlastet und hat keine Seitenlast. Dadurch unterliegt die Dreh-Schwenkeinrichtung 9 nur einem geringen Verschleiß und weist einen leichten Lauf auf.The conveyor belt 7 is attached to a front side of the milling device 3 when the milling system 1 is in operation. As a result, the rotating and swiveling device 9 is relieved during operation of the milling system 1 and has no side load. As a result, the rotating/pivoting device 9 is subject to only little wear and runs smoothly.

Die Dreh-Schwenkeinrichtung 9 weist ein direkt an dem Fräsradgehäuse montiertes Schwenkständerprofil 93 auf. Das Schwenkständerprofil 93 ist in der Arbeitsstellung der Fräsanlage 1 senkrecht aufgerichtet.The rotating/pivoting device 9 has a swivel stand profile 93 mounted directly on the cutting wheel housing. When the milling system 1 is in the working position, the swivel stand profile 93 is erected vertically.

Unten an dem Schwenkständerprofil 93 ist eine um die Rückseite des unteren Endes 71 des Förderbandes 7 geführte und um das Schwenkständerprofil 93 verschwenkbare Stützwinkelprofilkonstruktion 94 vorgesehen. Die Stützwinkelprofilkonstruktion 94 ist in dem gezeigten Ausführungsbeispiel U-förmig ausgebildet.At the bottom of the swivel post profile 93 there is provided a support angle profile construction 94 which is guided around the rear side of the lower end 71 of the conveyor belt 7 and can be swiveled around the swivel post profile 93 . The supporting angle profile construction 94 is U-shaped in the exemplary embodiment shown.

Oben an dem Schwenkständerprofil 93 ist eine Haltewinkelprofilkonstruktion 92 vorgesehen, die ebenfalls um das Schwenkständerprofil 93 verschwenkbar ist. An der Haltewinkelprofilkonstruktion 92 ist ein in der Arbeitsstellung der Fräsanlage vertikal nach oben ausgerichtetes Halteständerprofil 91 vorgesehen, welches mit Hilfe der Haltewinkelprofilkonstruktion 92 ebenfalls um das Schwenkständerprofil 93 verschwenkbar ist, aber durch die Haltewinkelprofilkonstruktion 92 in der Arbeitsstellung der Fräsanlage 1 mittig der Förderbandbreite angeordnet ist.At the top of the pivoting stand profile 93 there is a holding angle profile construction 92 which can also be pivoted about the pivoting stand profile 93 . A holding stand profile 91 is provided on the holding angle profile construction 92 and is aligned vertically upwards when the milling system is in the working position.

An das Halteständerprofil 91 ist ein Neigungsverstellzylinder 90 montiert, der mit dem Förderband 7 verbunden ist. In dem gezeigten Ausführungsbeispiel ist der Neigungsverstellzylinder 90 über eine U-förmige Gabel 96 mit den beiden Längstragprofilen 73, 74 des Förderbandes 7 verbunden.A tilt adjusting cylinder 90 which is connected to the conveyor belt 7 is mounted on the holding stand profile 91 . In the exemplary embodiment shown, the inclination adjustment cylinder 90 is connected to the two longitudinal support profiles 73, 74 of the conveyor belt 7 via a U-shaped fork 96.

Der Neigungsverstellzylinder 90 arbeitet hydraulisch und ist ein- und ausfahrbar und kann dadurch die Höhe und somit die Neigung des Förderbandes 7 verstellen.The inclination adjustment cylinder 90 works hydraulically and can be moved in and out and can thus adjust the height and thus the inclination of the conveyor belt 7 .

Zwischen dem Neigungsverstellzylinder 90 und dem Förderband 7 ist eine Knicksicherung 95 vorgesehen. Die Knicksicherung 95 bildet einen Anfahrschutz aus. In dem gezeigten Ausführungsbeispiel weist die Knicksicherung 95 eine Nut 97 auf, in die eine von dem Neigungsverstellzylinder 90 ausgehende Haltestrebe 98 eingreift und die darin verschraubt oder vernietet ist.An anti-kink device 95 is provided between the inclination adjustment cylinder 90 and the conveyor belt 7 . The kink protection 95 forms a collision protection. In the exemplary embodiment shown, the anti-buckling device 95 has a groove 97 into which a retaining strut 98 emanating from the inclination adjustment cylinder 90 engages and which is screwed or riveted therein.

Vor einem vorderen Ende 71 des Förderbandes 7 ist eine in den Figuren nicht gezeigte Abwurfklappe aus flexiblem Material vorgesehen.In front of a front end 71 of the conveyor belt 7 there is a discharge flap made of flexible material, which is not shown in the figures.

Wie es in den Figuren 4 und 5 zu sehen ist, wird das Förderband 7 in einer Halte- und Transportstellung der Fräsanlage 1 an einer Halteseite des Fräsradgehäuses 6 gehalten. Hierzu weist das Fräsradgehäuse 6 an seiner Halteseite die seitlich hinausragende Transportstütze 62 für das Förderband 7 auf, auf die das Förderband 7 aufgelegt und auf welcher es vorzugsweise in der Halte- und Transportstellung gesichert wird.Like it in the figures 4 and 5 can be seen, the conveyor belt 7 is held in a holding and transport position of the milling system 1 on a holding side of the milling wheel housing 6 . For this purpose, the cutting wheel housing 6 has on its holding side the laterally protruding transport support 62 for the conveyor belt 7, on which the conveyor belt 7 is placed and on which it is preferably secured in the holding and transport position.

Das hat den Vorteil, dass das Förderband 7 nicht an- und abgebaut werden muss und auch im an die Halteseite angeklappten Zustand an der Fräsanlage 1 verbleibt. Daraus ergibt sich ein optimaler und sicherer Transport und Fahrbetrieb ohne Mehraufwand sowie eine schnelle Herstellbarkeit der Einsatzbereitschaft der Fräsanlage 1 mit nur wenigen Handgriffen.This has the advantage that the conveyor belt 7 does not have to be attached and detached and also remains on the milling system 1 when it is folded onto the holding side. This results in an optimal and safe transport and driving operation without additional effort as well as the ability to quickly prepare the operational readiness of the milling system 1 with just a few manipulations.

In der gezeigten Ausführungsform der erfindungsgemäßen Fräsanlage 1 wird das Förderband 7 wird in der Arbeitsstellung als auch in der Halte- und Transportstellung über Klappverschlüsse gesichert.In the embodiment shown of the milling system 1 according to the invention, the conveyor belt 7 is secured in the working position as well as in the holding and transport position via folding locks.

Claims (15)

  1. Milling system (1) for introducing an installation slot into a ground surface (10), which system has a carrier vehicle (2) and a milling device (3) which is arranged on the front of the carrier vehicle (2), is connected to the carrier vehicle (2), and has a milling wheel (4), at least one hydraulic drive, and a milling wheel housing (6) having an ejection window (61) provided on the front of the milling wheel (4), on which ejection window a conveyor belt (7) is provided during operation of the milling system (1), characterized in that
    a front hydraulic support cylinder (81) which is oriented vertically in a working position of the milling system (1) and can be extended downward is provided on the milling wheel housing (6) in front of the axis of rotation (A) of the milling wheel (4) in the forward direction of travel (V) of the milling system (1); a rear hydraulic support cylinder (83) which is oriented vertically in a working position of the milling system (1) and can be extended upward is provided on the milling wheel housing behind the axis of rotation (A) of the milling wheel (4) in the forward direction of travel (V) of the milling system (1); and a hydraulic compensating cylinder (82) which hydraulically couples the front and the rear hydraulic support cylinder (81, 83) is provided on the milling wheel housing.
  2. Milling system according to claim 1, characterized in that the conveyor belt (7) is pivotably mounted on the milling wheel housing (6) and can be pivoted from the working position of the milling system (1), in which a rear end (72) of the conveyor belt (7) is located on the ejection window (61), into a holding or transport position of the milling system (1), in which the conveyor belt (7) is held on a holding side of the milling wheel housing (6), and vice versa.
  3. Milling system according to claim 2, characterized in that a horizontally oriented transport support (62) mounted on the milling wheel housing (6) for the conveyor belt (7) projects laterally beyond the holding side of the milling wheel housing (6).
  4. Milling system according to at least one of the preceding claims, characterized in that a horizontally pivotable rotating-pivoting device (9), which is connected to the conveyor belt (7) and has a retractable and extendable inclination adjustment cylinder (90) for the conveyor belt (7) attached thereto, is provided on the milling wheel housing (6).
  5. Milling system according to claim 4, characterized in that the inclination adjustment cylinder (90) is connected to both longitudinal support profiles (73, 74) of the conveyor belt (7), is mounted on a holding stand profile (91) of the rotating-pivoting device (9) which is oriented vertically in the working position of the milling system (1), and is pivotable thereon.
  6. Milling system according to claim 5, characterized in that the holding stand profile (91) is connected via a holding angle profile structure (92) to a pivot stand profile (93) which is rotatable about its longitudinal axis and is oriented vertically in the working position of the milling system (1).
  7. Milling system according to claim 6, characterized in that a support angle profile structure (94) or support bracket, which is guided around the rear side of a lower end (71) of the conveyor belt (7) and is pivotable about the pivot stand profile (93), is provided on the pivot stand profile (93).
  8. Milling system according to any of claims 5 to 7, characterized in that a buckling protection means (95) is provided between the inclination adjustment cylinder (90) and the conveyor belt (7).
  9. Milling system according to at least one of the preceding claims, characterized in that in that an ejection wedge or tooth (63), which is oriented in the forward direction of travel (V) of the milling system (1), is provided within the milling wheel housing (6), in front of and above the milling wheel (4), the underside (64) of said ejection wedge or tooth forming an acute angle (α) to the ground surface (10).
  10. Milling system according to at least one of the preceding claims, characterized in that on a conveyor band (75) of the conveyor belt (7), conveyor bars (76) which are oriented upright, extend transversely to the conveying direction (F) of the conveyor belt (7), and are made of flexible material are provided.
  11. Milling system according to at least one of the preceding claims, characterized in that at least one opening is provided in a rear region (65) of the milling wheel housing (6) located opposite the ejection window (61).
  12. Milling system according to at least one of the preceding claims, characterized in that an ejection hood (66) opened above the conveyor belt (7) is attached to the ejection window (61).
  13. Milling system according to at least one of the preceding claims, characterized in that a discharge flap made of flexible material is provided in front of a front end (71) of the conveyor belt (7).
  14. Milling system according to at least one of the preceding claims, characterized in that the hydraulic compensating cylinder (82) is provided between the front and the rear hydraulic support cylinder (81, 83) in an upright orientation in the working position of the milling system (1).
  15. Milling system according to at least one of the preceding claims, characterized in that the milling system (1) comprises a hydraulic valve which can be electrically controlled and switched from the carrier vehicle (2) and is integrated into the hydraulic supply of an inclination adjustment cylinder (90) for the conveyor belt (7) and of a hydraulic drive of the milling wheel (4).
EP20183532.9A 2019-07-08 2020-07-01 Milling installation Active EP3767037B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102019118434.7A DE102019118434B4 (en) 2019-07-08 2019-07-08 Milling machine

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EP3767037A1 EP3767037A1 (en) 2021-01-20
EP3767037B1 true EP3767037B1 (en) 2023-03-29

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CN114000398B (en) * 2021-11-13 2022-10-28 武汉市市政路桥有限公司 Light asphalt pavement road repairing device and method

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Publication number Priority date Publication date Assignee Title
FR2522038A1 (en) * 1982-02-19 1983-08-26 Hydro Armor Sarl MACHINE FOR CUTTING OR CURING SLICES
US5575538A (en) * 1995-06-01 1996-11-19 Astec Industries, Inc. Rock saw with centerline conveyor assembly and method of digging a narrow trench
US6729050B2 (en) * 2001-08-31 2004-05-04 Vermeer Manufacturing Company Control of excavation apparatus
US20120030973A1 (en) * 2010-08-05 2012-02-09 Doug Laing Earth mover which continuously excavates a trench and simultaneously clears the excavated trench of spoils
WO2016102646A1 (en) * 2014-12-24 2016-06-30 Simex Engineering S.R.L. Excavating equipment for excavating surfaces, in particular solid surfaces, and operating machine equipped with said excavating equipment
US20170101746A1 (en) * 2015-10-09 2017-04-13 The Charles Machine Works, Inc. Trenching Assembly

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