EP4577697A1 - Unité de coupe accessoire ayant des têtes de coupe transversales inclinées l'une par rapport à l'autre et ayant des engrenages dentés de sortie muni d'une denture biseautée et engin de chantier équipé d'une telle unité de coupe accessoire - Google Patents

Unité de coupe accessoire ayant des têtes de coupe transversales inclinées l'une par rapport à l'autre et ayant des engrenages dentés de sortie muni d'une denture biseautée et engin de chantier équipé d'une telle unité de coupe accessoire

Info

Publication number
EP4577697A1
EP4577697A1 EP23787047.2A EP23787047A EP4577697A1 EP 4577697 A1 EP4577697 A1 EP 4577697A1 EP 23787047 A EP23787047 A EP 23787047A EP 4577697 A1 EP4577697 A1 EP 4577697A1
Authority
EP
European Patent Office
Prior art keywords
attachment
milling
housing
toothing
gear
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP23787047.2A
Other languages
German (de)
English (en)
Inventor
Klaus Ertmer
Mina ZEYADA
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.)
Kemroc Holding GmbH
Original Assignee
Kemroc Holding GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kemroc Holding GmbH filed Critical Kemroc Holding GmbH
Publication of EP4577697A1 publication Critical patent/EP4577697A1/fr
Pending legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/18—Dredgers; Soil-shifting machines mechanically-driven with digging wheels turning round an axis, e.g. bucket-type wheels
    • E02F3/20—Dredgers; Soil-shifting machines mechanically-driven with digging wheels turning round an axis, e.g. bucket-type wheels with tools that only loosen the material, i.e. mill-type wheels
    • E02F3/205—Dredgers; Soil-shifting machines mechanically-driven with digging wheels turning round an axis, e.g. bucket-type wheels with tools that only loosen the material, i.e. mill-type wheels with a pair of digging wheels, e.g. slotting machines
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F5/00—Dredgers or soil-shifting machines for special purposes
    • E02F5/02—Dredgers or soil-shifting machines for special purposes for digging trenches or ditches
    • E02F5/08—Dredgers or soil-shifting machines for special purposes for digging trenches or ditches with digging wheels turning round an axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C18/00—Disintegrating by knives or other cutting or tearing members which chop material into fragments
    • B02C18/06—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives
    • B02C18/16—Details
    • B02C18/18—Knives; Mountings thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C18/00—Disintegrating by knives or other cutting or tearing members which chop material into fragments
    • B02C18/06—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives
    • B02C18/16—Details
    • B02C18/24—Drives

Definitions

  • the invention relates to an attachment milling unit with two cross-cutting heads arranged at an angle to one another.
  • the attachment milling unit comprises a housing with an attachment bracket at the rear end of the attachment milling unit for attachment to a movable carrier arm of a carrier device, preferably an excavator or a similar construction machine.
  • the attachment milling unit further comprises at least one motor and a gear unit which is arranged in the housing and is coupled on the drive side to at least one motor.
  • two cross-cutting heads which are driven in rotation via the gear unit are attached to both sides of the longitudinal axis of the housing, each cross-cutting head carrying numerous milling bits and each of the cross-cutting heads having a driven output shaft around which the cross-cutting head rotates.
  • the application area for such an attachment milling system is in particular canal construction, road construction, special foundation engineering, tunnel or hydraulic engineering.
  • the attachment milling machine is used, for example, to break up sealed surfaces but also for demolishing concrete and for removing certain layers of earth and rock.
  • Excavator-mounted milling machines are already known, which are designed as cross-cutting head milling machines and are equipped with carbide-tipped round shank chisels as cutting tools.
  • the milling machine When using this type of milling machine, the milling machine usually has to be swivelled sideways to break the material between the cutting heads.
  • the disadvantage of this Milling is that the cutting width is larger than the actual width of the milling head, which is particularly disadvantageous in canal construction.
  • a further disadvantage of these milling machines is the strain on the excavator's swivel mechanism, which is constantly exposed to large torsional and shear forces during milling.
  • Excavator-mounted milling machines are also often used to mine soft and medium-hard rocks such as limestone or gypsum. It is particularly important when mining gypsum that the fine fraction in the milled material is kept as low as possible.
  • excavator-mounted milling machines with lateral cutting heads that are swiveled along the mining wall the material broken off by the front cutting head is further crushed in an undesirable way by the following cutting head.
  • DE 100 41 275 B4 discloses a milling system for attachment to hydraulic carrier devices, which consists of two or more attachment milling machines of the same or different design with the same or different tool carriers, each driven separately by a hydraulic motor.
  • the individual attachment milling machines can be interchangeably arranged next to one another, one behind the other or at an angle to one another, at the same or different heights using connecting consoles. This should make it possible to remove material more efficiently in front of the carrier device.
  • this milling system is complex and not very suitable for trench construction, for example.
  • a so-called trencher which is equipped with a milling chain.
  • the trencher comprises auger shafts which are mounted vertically to the running direction of the milling chain and which push the removed soil away from the excavated trench.
  • a disadvantage here is the limited usability of this machine.
  • the trencher is unsuitable for removing material from a large area on a wall. Due to its high construction, the trencher is also subjected to high mechanical stress. The forces occur not only in the longitudinal direction of the rotating milling chain, but also perpendicular to the milling chain, especially when the milling tool hits obstacles such as stones or similar.
  • the attachment milling system for attachment to a movable support arm of a carrier device.
  • the attachment milling system comprises an attachment console to which rotating cutting heads are attached on both sides of the longitudinal axis of the attachment console.
  • This attachment milling system also comprises a rotating milling chain with a running direction that runs parallel to the longitudinal axis of the attachment console and that extends between the two cutting heads.
  • Numerous milling chisels are attached to the milling chain and the cutting heads, which describe a cylindrical milling surface when the cutting heads rotate.
  • the milling chisels of the milling chain form a semi-cylindrical surface at the exposed front end of the milling chain.
  • the front reversal line of the milling chain lies essentially in a plane that is tangent to the milling surfaces of the two cutting heads.
  • the contact lines of the milling chisels of the cutting heads with the surface to be milled are therefore located directly next to the contact line of the milling chisels of the milling chain without any significant gap, which in devices without a milling chain is determined by the width of the mounting bracket.
  • These contact lines are also conveniently located in a common plane. This means that an uninterrupted milling surface can be machined, which makes a pendulum transverse movement of the milling attachment system superfluous, but the structure This system is comparatively expensive and the milling chain in particular is subject to heavy wear.
  • WO 2021/239225 A1 describes a drum cutting arrangement for a carrier vehicle.
  • the drum cutting arrangement comprises a main element with a longitudinal extension; a first and a second rotatable cutting drum which are connected to the main element and arranged on opposite sides of the main element; and a drive system which is arranged to drive the first and second cutting drums.
  • the first cutting drum is rotatable about a first axis and the second cutting drum is rotatable about a second axis.
  • the first axis and the second axis lie perpendicular to the longitudinal extension of the main element with respect to a first plane, wherein an angle is included between the first axis and the second axis.
  • a complex gear is designed to drive the two cutting drums.
  • the main element has at least one central spur gear with two laterally attached bevel gears which interact with two further bevel gears assigned to the cutting drums.
  • two bevel gear sets double bevel gear pairing
  • the main element is therefore made up of three gears, namely a central spur gear and two lateral bevel gears, the latter driving the other bevel gears located on the shafts of the cutting drums. This construction is very complex and prone to repairs.
  • the object of the invention is, based on the prior art, to provide an improved milling unit for attachment to a movable support arm of a carrier device, which is easier and cheaper to manufacture, at the same time but allows the creation of an essentially uninterrupted milling surface without requiring a constant pendulum movement of the support arm and the milling unit attached to it.
  • the drive gear should be inexpensive and robust.
  • the invention should provide an improved construction machine with such a milling unit.
  • the two output shafts of the cross-cutting heads are arranged at an angle to one another, each forming an acute angle with the longitudinal axis of the housing on the side facing away from the add-on console.
  • an angle in the range of 135° to 175°, preferably in the range of 160° to 170° is spanned between the two output shafts of the cross-cutting heads.
  • the cross-cutting heads are thus inclined towards one another, so that the milling surfaces described by the rotating milling heads are closer together on the front-facing side of the cross-cutting heads than on the rear-facing side.
  • the distance between the milling surfaces described is smaller than the width of the housing, preferably smaller than half the width of the housing of the add-on milling unit on the rear-facing side of the cross-cutting heads. In the preferred case, the distance between the milling surfaces described is therefore only a few centimeters.
  • the invention is characterized in that the
  • Gear unit comprises a drive spur gear whose Rotation axis runs perpendicular to the longitudinal axis of the housing.
  • the tip lines of the individual teeth of the drive spur gear therefore run transversely to the longitudinal axis of the housing and thus preferably parallel to the milling contact line, which is described when the cross-cutting heads rotate at the front end of the attachment milling unit.
  • an output gear with a beveloid toothing also called conical spur gears
  • conical spur gears is attached to each of the two output shafts of the cross-cutting heads, with the beveloid toothing of each output gear engaging directly in an associated section of the spur toothing of the drive spur gear.
  • the invention makes it possible to reduce to a minimum the area between the cutting heads that cannot be reached by the milling heads of the cross-cutting heads, without the need for a milling chain running between the cutting heads, and at the same time to use a stable, low-wear and low-maintenance transmission equipped with few gears.
  • beveloid gearing allows a significantly simplified and, above all, more compact design compared to the state of the art, since no double bevel gear sets are used and thus only one spur gear with straight teeth and two beveloid-toothed gears are required, which are driven directly by the straight teeth.
  • each of the two output gears is also provided with an internal toothing, which is placed on an external toothing of a toothed connecting shaft.
  • the connecting shaft connects the internal toothing of the Output shaft with the internal toothing of the output gear carrying the beveloid toothing.
  • the output shaft is preferably mounted in an output housing with two tapered roller bearings. The right and left cross-cutting heads are then placed on the output shaft.
  • the gear unit comprises two partial drive spur gears that are parallel to one another and whose common axis of rotation runs perpendicular to the longitudinal axis of the housing.
  • an output gear with a beveloid toothing is mounted on each of the two output shafts, with the beveloid toothing of each output gear engaging in the spur toothing of one of the two drive spur gears.
  • the milling cutters of each cross-cutting head describe a truncated cone-shaped milling surface when it rotates.
  • the two truncated cone-shaped milling surfaces at the front end of the attachment milling unit touch a common milling contact plane, i.e. the milling contact line, which is defined in sections by the two cross-cutting heads standing next to each other, extends in a common plane, which is preferably perpendicular to the longitudinal axis of the housing.
  • the motor is a hydraulic motor, which is preferably attached to a side surface of the housing, or alternatively can be enclosed in the housing.
  • the attachment milling unit can comprise two hydraulic motors, which are preferably attached to opposite side surfaces of the housing.
  • the two hydraulic motors lic motors can be used together to drive the drive spur gear or drive two independently rotating drive gears.
  • the two cross-cutting heads are driven independently of each other, which enables separate speed control and can be used, for example, to make one of the two cross-cutting heads rotate more slowly than the other under certain conditions or even to stop it completely. This means, for example, that curved trenches can be milled more easily and with less wear on the cross-cutting heads.
  • the gear unit comprises at least one drive pinion, which is in driving engagement with the drive spur gear directly or indirectly via further gears.
  • Fig. 1 is a schematic diagram of a first embodiment of an add-on milling unit according to the invention
  • Fig. 2 is a sectional drawing of a second embodiment of the attachment milling unit.
  • Fig. 1 shows a milling unit attachment in a basic view, in which a housing and an attachment bracket, which serves to attach the milling unit attachment to the support arm of an excavator or the like, are not shown for the sake of simplicity.
  • the housing which is not shown, however, has a longitudinal extension which is described by a longitudinal axis 01.
  • the milling unit attachment in this embodiment has a high-torque motor 02 which is mounted on one side of the housing and is preferably supplied by the hydraulic system of the excavator. Alternatively, an electric motor can be used.
  • a gear unit is arranged inside the housing and is driven by the motor 02.
  • the gear unit comprises a drive pinion 03 which is flanged directly onto the motor shaft.
  • the gear unit also comprises a drive spur gear 04 whose rotation axis 05 runs perpendicular to the longitudinal axis 01 of the housing.
  • the add-on milling unit has two cross-cutting heads 06 which are driven in rotation via the gear unit and are attached to both sides of the longitudinal axis 01 of the housing and carry numerous milling cutters 07, whereby the milling cutters are only shown on the cross-cutting head on the right in the drawing.
  • these milling cutters 07 describe a truncated cone-shaped milling surface 08, which is symbolized by dashed lines.
  • Each cross-cutting head 06 sits on a driven output shaft 09, around which the cross-cutting head rotates.
  • the two output shafts 09 of the cross-cutting heads are arranged at an angle to one another. They preferably span an angle in the range of 150° to 170°.
  • the spanned angle is preferably selected such that the truncated cone-shaped milling surface 08 with their surface or contact line facing the milling surface lie in a common plane that is vertical to the longitudinal axis 01 of the housing.
  • the output shafts 09 each enclose an acute angle with the longitudinal axis 01 of the housing at the front end, preferably approximately 75° to 85°.
  • an output gear 10 with a beveloid toothing is mounted on the output shaft 09, wherein the beveloid toothing of each output gear 10 directly engages an associated section of the spur toothing of the drive spur gear 04.
  • Fig. 2 shows a modified embodiment of the add-on milling unit in a sectional view.
  • the direct engagement of the beveloid toothing of the output gears 10 in the associated lateral areas of the straight toothing of the drive wheel 04 is clearly visible here.
  • the drive pinion 03 engages in the middle area of the toothing.
  • This arrangement has the advantage that an even load is applied across the toothing surface on the drive gear, and thus even wear occurs. While the drive force is introduced in the middle area of the toothing, it is transferred to the output gears 10 in the lateral area of the toothing that is not meshed by the drive pinion 03.
  • the special beveloid toothing ensures that the toothing does not change in the axial direction of the drive gear, i.e. along the individual tooth flanks, which allows for simple and inexpensive production of the drive gear.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Gear Transmission (AREA)
  • Drilling And Exploitation, And Mining Machines And Methods (AREA)
  • Gear Processing (AREA)

Abstract

L'invention concerne une unité de coupe accessoire qui comprend un boîtier ayant un support de fixation destiné à être fixé à un bras de support mobile d'un dispositif de support. Le boîtier s'étend le long d'un axe longitudinal (01). L'unité de coupe accessoire comprend en outre au moins un moteur (02) et une unité de transmission, l'unité de transmission ayant un engrenage droit d'entraînement (04), dont l'axe de rotation (05) s'étend perpendiculairement à l'axe longitudinal (01) du boîtier. Deux têtes de coupe transversales (06) qui sont entraînées en rotation au moyen de l'unité de transmission sont montées des deux côtés de l'axe longitudinal (01) du boîtier et portent de nombreuses dents de coupe (07). Chacune des têtes de coupe transversales (06) comporte un arbre de sortie entraîné (09) autour duquel tourne la tête de coupe transversale (06), les deux arbres de sortie (09) des têtes de coupe transversales (06) étant disposés à un certain angle l'un par rapport à l'autre et entourant chacun un angle aigu avec l'axe longitudinal (01) du boîtier sur le côté opposé au support de fixation. Une roue dentée de sortie (10) présentant une denture conique est montée sur chacun des arbres de sortie (09), chaque denture conique s'engrenant directement avec une partie associée de la denture droite de l'engrenage droit d'entraînement (04).
EP23787047.2A 2022-10-13 2023-10-06 Unité de coupe accessoire ayant des têtes de coupe transversales inclinées l'une par rapport à l'autre et ayant des engrenages dentés de sortie muni d'une denture biseautée et engin de chantier équipé d'une telle unité de coupe accessoire Pending EP4577697A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102022126637.0A DE102022126637A1 (de) 2022-10-13 2022-10-13 Anbaufräseinheit mit zueinander winklig stehenden Querschneidköpfen und Abtriebszahnrädern mit Belevoid-Verzahnung
PCT/EP2023/077695 WO2024078985A1 (fr) 2022-10-13 2023-10-06 Unité de coupe accessoire ayant des têtes de coupe transversales inclinées l'une par rapport à l'autre et ayant des engrenages dentés de sortie muni d'une denture biseautée et engin de chantier équipé d'une telle unité de coupe accessoire

Publications (1)

Publication Number Publication Date
EP4577697A1 true EP4577697A1 (fr) 2025-07-02

Family

ID=88372220

Family Applications (1)

Application Number Title Priority Date Filing Date
EP23787047.2A Pending EP4577697A1 (fr) 2022-10-13 2023-10-06 Unité de coupe accessoire ayant des têtes de coupe transversales inclinées l'une par rapport à l'autre et ayant des engrenages dentés de sortie muni d'une denture biseautée et engin de chantier équipé d'une telle unité de coupe accessoire

Country Status (6)

Country Link
US (1) US12559902B2 (fr)
EP (1) EP4577697A1 (fr)
JP (1) JP7850350B2 (fr)
CN (1) CN119948225A (fr)
DE (1) DE102022126637A1 (fr)
WO (1) WO2024078985A1 (fr)

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3424999C2 (de) * 1984-07-06 1994-01-13 Bauer Spezialtiefbau Schlitzwandfräse
US4718504A (en) * 1985-03-15 1988-01-12 Tone Boring Co., Ltd. Trench excavator
JPH10227028A (ja) * 1997-02-13 1998-08-25 Koken Boring Mach Co Ltd 地盤の掘削撹拌装置
DE10041275B4 (de) 2000-08-23 2006-07-27 Firma Klaus Ertmer Maschinenbautechnologie Frässystem zum Anbau an hydraulische Trägergeräte
US7096609B2 (en) 2003-02-04 2006-08-29 Wesley Allen Bainter Trencher unit
EP1580327B1 (fr) 2004-03-26 2008-05-21 BAUER Maschinen GmbH Appareil pour creuser des tranchées dans le sol
DE102008041982B4 (de) 2008-09-11 2010-06-17 Klaus Ertmer Anbaufrässystem mit Schneidköpfen und Fräskette
US8613143B2 (en) * 2010-12-29 2013-12-24 Magna Powertrain Of America, Inc. Beveloid planetary gear drive for transfer case or transmission
DE102013208645B4 (de) * 2013-05-10 2018-01-11 Wirtgen Gmbh Vorrichtung, insbesondere Kleinfräse, zum Bearbeiten von Straßenoberflächen
DE102014015584B4 (de) * 2014-10-21 2018-10-25 Bomag Gmbh Fräswalze und Bodenfräsmaschine mit derartiger Fräswalze
BR112017014862B1 (pt) * 2015-01-15 2022-09-13 Meccanica Breganzese S.P.A. In Breve Mb S.P.A. Aparelho triturador rotativo hidráulico para um equipamento de construção
IT201700112156A1 (it) * 2017-10-06 2019-04-06 Soilmec Spa Utensile di scavo per la realizzazione di diaframmi e relativa attrezzatura di scavo
DE102019103009A1 (de) * 2019-02-07 2020-08-13 F. Zimmermann Gmbh Werkzeugkopfeinheit für spanabhebende Bearbeitung von Werkstücken mit drei simultanfähigen Drehachsen und Werkzeugmaschine mit dieser
EP4158155A1 (fr) 2020-05-28 2023-04-05 Construction Tools GmbH Agencement de cisaille à tambour

Also Published As

Publication number Publication date
DE102022126637A1 (de) 2024-04-18
WO2024078985A1 (fr) 2024-04-18
US20240125086A1 (en) 2024-04-18
JP7850350B2 (ja) 2026-04-22
JP2025534511A (ja) 2025-10-15
US12559902B2 (en) 2026-02-24
CN119948225A (zh) 2025-05-06

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