EP1715106A1 - Fraiseuse mobile - Google Patents

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Publication number
EP1715106A1
EP1715106A1 EP05252551A EP05252551A EP1715106A1 EP 1715106 A1 EP1715106 A1 EP 1715106A1 EP 05252551 A EP05252551 A EP 05252551A EP 05252551 A EP05252551 A EP 05252551A EP 1715106 A1 EP1715106 A1 EP 1715106A1
Authority
EP
European Patent Office
Prior art keywords
rotary cutter
cutter according
elastomeric
shock absorbing
absorbing means
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.)
Withdrawn
Application number
EP05252551A
Other languages
German (de)
English (en)
Inventor
Edward Van Amelsfoort
Hans Van Sambeek
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.)
Caterpillar Work Tools BV
Original Assignee
Caterpillar Work Tools BV
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 Caterpillar Work Tools BV filed Critical Caterpillar Work Tools BV
Priority to EP05252551A priority Critical patent/EP1715106A1/fr
Publication of EP1715106A1 publication Critical patent/EP1715106A1/fr
Withdrawn legal-status Critical Current

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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
    • E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
    • E02F3/36—Component parts
    • E02F3/3604—Devices to connect tools to arms, booms or the like
    • 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
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
    • E02F3/36—Component parts
    • E02F3/42—Drives for dippers, buckets, dipper-arms or bucket-arms
    • E02F3/425—Drive systems for dipper-arms, backhoes or the like
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E02F9/2203—Arrangements for controlling the attitude of actuators, e.g. speed, floating function
    • E02F9/2207—Arrangements for controlling the attitude of actuators, e.g. speed, floating function for reducing or compensating oscillations

Definitions

  • the present disclosure relates to the field of mobile milling machines. More specifically but not exclusively the present invention relates to rotary cutters that are suitable for mounting to work machines such as hydraulic excavators or the like.
  • rotary cutters have become popular tools for milling and working hard stoney surfaces such as concrete, natural stone, compacted gravel, etc. where they may be used for example to create trenches or to level uneven surfaces.
  • the rotary cutters are often mounted to a work machine such as an excavator or the like.
  • the excavator supplies hydraulic power which may be converted to mechanical power by a hydraulic motor for driving the cutting drums either directly or indirectly via a gear train.
  • the cutting drum is fitted with a multitude of cutting elements ('picks') which are mounted and arranged in such a manner that vibrations and uneven loadings are minimized.
  • a rotary cutter with at least one rotatably mounted cutting drum and a body having a first member and a second member.
  • the first member is adapted for connection to a work machine.
  • the second member has support means adapted for supporting the at least one rotatably mounted cutting drum and the support means extends into the drum from one lateral side of the drum only.
  • a shock absorbing means interposed between the first member and the second member which is adapted for reducing the transmittal of shocks and vibrations from the first member to the second member.
  • a rotary cutter 10 is mounted to a work arm 12 of an excavator 14.
  • the operator (not shown) of the excavator 14 can position the rotary cutter 10 relative to a work surface 16 by controlling the flow of hydraulic fluid to the hydraulic rams 18 mounted to the work arm which alter the angles between the excavator body 20 and the segments of work arm 12, i.e. boom section 22, stick section 24 and tool carrier 26.
  • the excavator body 20 is rotatably mounted to an undercarriage 28 to enable a rotating movement of the excavator body, the work arm 12 and the rotary cutter 10 relative to the undercarriage 28. This rotating movement allows the rotary cutter to move sideways which may facilitate the cutting process.
  • the rotary cutter can be moved along any axis and in any direction within the working range of the machine.
  • the work arm 12 By controlling the work arm 12 not only can the rotary cutter be positioned as desired, it also allows a certain level of control over the force that is exerted by the rotary cutter 10 on the work surface 16.
  • a work machine other than an excavator may be used to perform the function of host machine or that the excavator may have a configuration different from the excavator 14 shown in Fig. 1, for example the work arm may have more or less segments.
  • Figs. 2 to 6 show in more detail several embodiments of a rotary cutter 10 according to the current invention.
  • the rotary cutter 10 in the example of Fig. 2 has a body 30 with a first member 32 and a second member 34, but variants with more members may be possible. Another possible variant may have part of work arm 12 form at least partially first member 32.
  • the first member 32 is shown as a box like structure which is preferred to give a high level of integrity.
  • the box like structure allows for the protection of hydraulic or mechanical components as they can be mounted or routed within or through the confines of the box like structure.
  • the box like structure may be open ended or have passages to allow entrance and exit of components such as hydraulic hoses and pipes.
  • the first member 32 has a first end 36 and a second end 38.
  • the first end 36 is adapted to be mounted onto the excavator 14 via an adapter such as tool carrier 26.
  • the second end 38 is adapted for connection to the second member 34, as described in more detail below.
  • the second member 34 is also shown as a box like structure, but can also be constructed in a different form such as an 'I' beam. However, a box like structure may again be preferred from an integrity and component protection point of view.
  • FIG. 2 shows a rotary cutter of the dual drum type wherein the drums are mounted to opposite lateral sides of the second member 34. Both single and dual drum rotary cutters are known in the art, but the number of cutting drums is not of any particular significance to the current disclosure.
  • Cutting drums 40 are supported from one lateral side by second member 34 in a conventional manner and are provided with a plurality of cutting tool holders 41. The cutting tools themselves are not shown.
  • the holders 41 are arranged in a specific manner to reduce vibration, noise and harshness during operation.
  • the cutting drums 40 may be driven directly by one or more hydraulic motors (not shown) or via alternative means such as a gear train (not shown). If driven directly by a hydraulic motor, it may be preferable that this hydraulic motor is substantially placed in a volume defined by the second member 34 or within the confines of one of the cutting drums 40 to protect the hydraulic motor and its connections.
  • the hydraulic motor may also be located in such a manner that it does not drive the cutting drum 40 via a direct drive shaft arrangement. It is known in the art to locate the hydraulic motor remotely from the cutting drum, wherein the driving force is transmitted from the hydraulic motor to the cutting drum 40 via a drive line such as a gear train. Similar to the first member 32, second member 34 may also be open ended or have passages to enable the entrance and exit of components such as hydraulic hoses and pipes.
  • the second member 34 is further provided with two projections 42 that are adapted to engage with the second end 38 of the first member 32.
  • first member 32 may be provided with the projections 42 instead of the second member 34 and the number and type of projections may also be varied.
  • the second end 38 of the first member 32 is provided with at least one passage, but preferably a plurality of upper linkage passages 44.
  • the projections 42 of the second member 34 are accordingly provided with at least one, but preferably a plurality, of lower linkage passages 46.
  • At least one of the upper linkage passages 44 may be provided with an elastomeric bushing 50.
  • the elastomeric bushing 50 may extend over the full length of its corresponding passage 44 or it may extend partially only. It may also be preferred to have two or more shorter bushings instead of one longer bushing.
  • the elastomeric bushing 50 may be provided with an internal non-elastomeric liner 52 or an external non-elastomeric liner 54 or both to provide integrity and hence extended service life. Furthermore, the elastomeric bushing 50 may be an integral part of pin 48.
  • the first member 32 and the second member 34 may be connected to each other by pins 48 which extend through the bushings 50 in the upper linkage passages 44 and through the lower linkage passages 46.
  • Pins 48 may be of the conventional type made out of a material such as metal and may have conventional retention means such as a bolting arrangement or retainer plate (not shown). This arrangement results in the first member 32 and the second member 34 being in substantially fixed positions relative to each other except for the movement provided by the resilience of the elastomeric bushings 50.
  • FIG. 4 Another embodiment of the current disclosure is shown in Figs. 4 and 5.
  • Like components have like reference signs as in the previous figures except for the first numeral which is embodiment specific.
  • the first member 32 and the second member 34 were directly connected by two or more pins 48, this embodiment has only one direct connection between the first member 132 and the second member 134.
  • the first member 132 has an upper linkage passage 144 that corresponds to the lower linkage passages 146 (one shown only) of the second member 134.
  • a pin 148 extends through both the first member 132 and the second member 134 to pivotally connect the first and second member.
  • the first member 132 further has an upper linkage passage 154 whilst the second member 134 further has at least one but preferably a plurality of lower linkage passages 156.
  • a resilient member such as a hydraulic shock damper 162 has a first end in the form of a rod end passage 164 and second end in the form of the housing end passage 166.
  • the shock damper 162 may be connected to the first member 132 by a pin 148 that extends through both the upper linkage passage 154 and the rod end passage 164.
  • shock damper 162 may be connected to the second member 134 by a pin 148 that extends through the lower linkage passage 156 and the housing end passage 166.
  • the resilient member may be of a different type than a hydraulic shock damper such as damper 162.
  • the resilient member should be able to dampen to a certain degree shocks and vibrations that are generated by the operation of the rotary cutter.
  • the hydraulic shock damper 162 may be replaced or assisted by mechanical springs or alternatively an apparatus such as a hydraulic cylinder with a gas or spring loaded accumulator may be provided.
  • an apparatus such as a hydraulic cylinder with a gas or spring loaded accumulator may be provided.
  • Fig. 6 shows another embodiment of the current disclosure.
  • the basic construction principle of the rotary cutter 210 is substantially similar to previously discussed embodiments except for the connection between the first member 232 and the second member 234.
  • the first member 232 is provided with at least two upper linkage passages 244 whilst the second member 234 has corresponding lower linkage passages 246.
  • the rotary cutter 210 further has at least two resilient members 262 that may be similar to the resilient members 162.
  • the connection between the resilient members 262 and the first member 232 and the second member 234 may again be substantially similar to the connection between resilient member 162 and first member 132 and second member 134.
  • first member 232 and second member 234 are not pivotally connected as they are pivotally restrained by sliding mechanism 268. Sliding mechanism 268 allows second member 234 to move relative to first member 232 along an axis 270.
  • a bushing substantially similar to an elastomeric bushing 50 may be provided in any or all of passages 244 and 246.
  • the operator controls the location of the rotary cutter 10, 110, 210 relative to the work surface 16 by controlling the flow to hydraulic rams 18 and by rotation of excavator body 20 relative to undercarriage 28.
  • a rotation of the excavator body 20 will of course result in an arc shaped path of the rotary cutter, but this can at least partially be corrected by adjusting the angles between the individual segments of work arm 12.
  • the rotary cutter 10, 110, 210 may be applied to any surface within the range of the work machine regardless of the surface being horizontal, vertical or in an intermediary position, or of the surface being either below or above the general position of the excavator body. For this example it is assumed the work surface is uneven but substantially horizontal and in the same plane as the surface on which undercarriage 28 rests.
  • the rotary cutter 10, 110, 210 is forced onto the work surface.
  • the hydraulic system of excavator 14 may drive the cutting drums 40, 140, 240 at around a speed of 100 rpm. Each drum may have around 30 cutting tools mounted to it which for a dual drum design would result in 6000 impacts per minute.
  • This coupled with movement of the rotary cutter 10, 110, 210 by adjustments made to the work arm 12 or the position of excavator 14 may obviously lead to high levels of shocks and vibrations. These shocks and vibrations are transferred through the loader arm 12 to the machine body 20 and the operator (not shown).
  • the shocks and vibrations may be reduced by the incorporation of the shock absorbing means such as the elastomeric members 50 or resilient members 162, 262.
  • the shock absorbing means are interposed between a first member 32, 132, 232 and a second member 34, 134, 234 of the body 30, 130, 230 of the rotary cutter.
  • one embodiment may be preferred over an alternative embodiment.
  • an embodiment utilizing elastomeric members such as 50 may be preferred as the characteristics of the elastomeric members 50 may be more suited to reducing the level or intensity of vibrations rather than components such as shock absorbers 162, 262.
  • an elastomeric member such as 50 may also be preferred in certain applications as these elastomeric members 50 are able to function regardless of the direction of travel of the vibrations or shocks.
  • Resilient members such as shock dampers 162, 262 may have a more limited applicability under certain conditions as they may be more adapted to absorb forces that act substantially parallel and in proximity to the axial centerline. However under different conditions, e.g. where shocks are more dominant than vibrations, shock dampers such as 162, 262 may provide better characteristics. Of course there may also be a combination of both elastomeric members such as 50 and resilient members such as hydraulic shock dampers 162, 262.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Vibration Prevention Devices (AREA)
EP05252551A 2005-04-23 2005-04-23 Fraiseuse mobile Withdrawn EP1715106A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP05252551A EP1715106A1 (fr) 2005-04-23 2005-04-23 Fraiseuse mobile

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP05252551A EP1715106A1 (fr) 2005-04-23 2005-04-23 Fraiseuse mobile

Publications (1)

Publication Number Publication Date
EP1715106A1 true EP1715106A1 (fr) 2006-10-25

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ID=35058441

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05252551A Withdrawn EP1715106A1 (fr) 2005-04-23 2005-04-23 Fraiseuse mobile

Country Status (1)

Country Link
EP (1) EP1715106A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008041982A1 (de) * 2008-09-11 2010-04-15 Klaus Ertmer Anbaufrässystem mit Schneidköpfen und Fräskette
KR20180053329A (ko) * 2015-09-10 2018-05-21 소레탄체 프레씨네트 드릴링 머신
KR20180053330A (ko) * 2015-09-10 2018-05-21 소레탄체 프레씨네트 드릴링 머신
WO2022228974A1 (fr) * 2021-04-28 2022-11-03 Soletanche Freyssinet Machine de forage ayant un châssis de benne preneuse muni d'un dispositif de fraisage à démontage rapide
CN115387412A (zh) * 2022-07-26 2022-11-25 中铁十六局集团第一工程有限公司 一种高海拔严寒区域冻土开挖设备

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR944459A (fr) * 1946-04-15 1949-04-06 Portée élastique
DE2447934A1 (de) * 1974-10-08 1976-04-22 Ewald Schuette Fahrbarer kantenschneider
GB2094393A (en) * 1981-03-06 1982-09-15 Pernas Charter Management Sdn Flexible coupling between inner and outer concentric member
EP0277326A2 (fr) * 1987-01-08 1988-08-10 Econ Group Limited Dispositif de travaux routiers
US5216811A (en) * 1990-09-10 1993-06-08 Steel Parts Corporation Method for forming a bushing
EP0905321A1 (fr) * 1997-03-25 1999-03-31 Ito Co., Ltd. Machine de decoupage de revetement de route
EP1273411A2 (fr) * 2001-07-05 2003-01-08 Klaus Ertmer Maschinenbautechnologie Dispositif d'activation pour tête de découpe sur support d'outil hydraulique

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR944459A (fr) * 1946-04-15 1949-04-06 Portée élastique
DE2447934A1 (de) * 1974-10-08 1976-04-22 Ewald Schuette Fahrbarer kantenschneider
GB2094393A (en) * 1981-03-06 1982-09-15 Pernas Charter Management Sdn Flexible coupling between inner and outer concentric member
EP0277326A2 (fr) * 1987-01-08 1988-08-10 Econ Group Limited Dispositif de travaux routiers
US5216811A (en) * 1990-09-10 1993-06-08 Steel Parts Corporation Method for forming a bushing
EP0905321A1 (fr) * 1997-03-25 1999-03-31 Ito Co., Ltd. Machine de decoupage de revetement de route
EP1273411A2 (fr) * 2001-07-05 2003-01-08 Klaus Ertmer Maschinenbautechnologie Dispositif d'activation pour tête de découpe sur support d'outil hydraulique

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008041982A1 (de) * 2008-09-11 2010-04-15 Klaus Ertmer Anbaufrässystem mit Schneidköpfen und Fräskette
DE102008041982B4 (de) * 2008-09-11 2010-06-17 Klaus Ertmer Anbaufrässystem mit Schneidköpfen und Fräskette
KR20180053329A (ko) * 2015-09-10 2018-05-21 소레탄체 프레씨네트 드릴링 머신
KR20180053330A (ko) * 2015-09-10 2018-05-21 소레탄체 프레씨네트 드릴링 머신
WO2022228974A1 (fr) * 2021-04-28 2022-11-03 Soletanche Freyssinet Machine de forage ayant un châssis de benne preneuse muni d'un dispositif de fraisage à démontage rapide
FR3122448A1 (fr) * 2021-04-28 2022-11-04 Soletanche Freyssinet Machine de forage ayant un châssis de benne preneuse muni d’un dispositif de fraisage à démontage rapide
CN115387412A (zh) * 2022-07-26 2022-11-25 中铁十六局集团第一工程有限公司 一种高海拔严寒区域冻土开挖设备
CN115387412B (zh) * 2022-07-26 2024-04-09 中铁十六局集团第一工程有限公司 一种高海拔严寒区域冻土开挖设备

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