EP0071677A1 - Grabenfräse - Google Patents

Grabenfräse Download PDF

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Publication number
EP0071677A1
EP0071677A1 EP81303595A EP81303595A EP0071677A1 EP 0071677 A1 EP0071677 A1 EP 0071677A1 EP 81303595 A EP81303595 A EP 81303595A EP 81303595 A EP81303595 A EP 81303595A EP 0071677 A1 EP0071677 A1 EP 0071677A1
Authority
EP
European Patent Office
Prior art keywords
trench
cutter member
arm
prime mover
rotary cutter
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Withdrawn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
EP81303595A
Other languages
English (en)
French (fr)
Inventor
Terry Mckaine Torr
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.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to AU71200/81A priority Critical patent/AU7120081A/en
Application filed by Individual filed Critical Individual
Priority to EP81303595A priority patent/EP0071677A1/de
Priority to ZA815409A priority patent/ZA815409B/xx
Publication of EP0071677A1 publication Critical patent/EP0071677A1/de
Withdrawn legal-status Critical Current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
    • E02F3/18—Dredgers; Soil-shifting machines mechanically-driven with digging wheels turning round an axis, e.g. bucket-type wheels
    • E02F3/186—Dredgers; Soil-shifting machines mechanically-driven with digging wheels turning round an axis, e.g. bucket-type wheels with the axis being substantially parallel to the direction of travel
    • 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
    • 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
    • E02F9/28—Small metalwork for digging elements, e.g. teeth scraper bits
    • E02F9/2866—Small metalwork for digging elements, e.g. teeth scraper bits for rotating digging elements

Definitions

  • the present invention relates to a trench cutter.
  • a trench cutter arranged to be mounted on a prime mover comprising an arm having a first end arranged to be pivotally mounted on the prime mover such that it can be pivoted in a vertical plane extending laterally of the prime mover between a first raised, transport position and a second lowered, operative position, and a second end having mounted thereto a rotary cutter member comprising a plurality of radially spaced first facing cutting blades, and a plurality of spaced, invert cutting second blades mounted on the rotary cutter member generally rearwardly of the first blades, said second blades being arranged to form the invert of a trench when the rotary cutter member is rotated, means being provided for rotating the rotary cutter member about its axis laterally of the direction of movement of the prime mover when in use.
  • the rotary cutter member further comprises a plurality of forwardly extending blades mounted on a back plate generally normal to the direction of rotation of the rotary cutter member, said forwardly extending blades being arranged to remove spoil to the side of the trench.
  • a prime mover comprising a rear frame member having the first end of an arm of a trench cutter of the present invention, pivotally mounted thereto.
  • the prime mover is provided with an hydraulic power output which can be used to transmit power to the rotary cutter member to cause it to rotate.
  • an hydraulic piston and cylinder mounted between the prime mover and the arm for raising and lowering the arm. The trench cutter of the present invention when mounted on a prime mover can be moved to another location upon raising the arm to the raised transport position.
  • FIGS 1 and 2 there is shown a prime mover 10 in the form of a tractor having a rear, laterally extending horizontal frame member 12.
  • Bracket 14 is mounted on the frame member 12.
  • the bracket 14 contains an aperture adjacent its upper end.
  • the prime mover 10 is provided with an hydraulic power take off.
  • the trench cutter 16 comprises an elongated arm 18 having a first end provided with an aperture.
  • the first end of the arm 18 is connected to the bracket 14 by a pin or the like extending through the aperture in the bracket 14 and the aperture in the arm 18.
  • the pin or the like is secured in place by any suitable means.
  • An hydraulic piston and cylinder assembly 20 has one end connected to an end of the frame member 12 and a further end connected to an intermediate point on the arm 18.
  • the hydraulic piston and cylinder assembly 20 is operatively connected to the hydraulic power take off of the prime mover 10 and is arranged, in use, to raise and lower the arm 18 in a vertical plane extending laterally of the prime mover 10.
  • the arm 18 is raised by extension of the hydraulic piston and cylinder assembly 20.
  • the trench cutter 16 can be readily transported to another location.
  • the arm 18 is lowered by contraction of the hydraulic piston and cylinder assembly 20 and in this position the trench cutter 16 can be used to cut a trench.
  • the arm 18 further comprises a second end having mounted thereon a rotary, cutter member 22.
  • the rotary cutter member 22 is mounted to the arm 18 in the following manner as shown most clearly in Figure 4.
  • a pair of brackets 24 extend outwardly from the arm 18.
  • the extremities of the brackets 24 are located between a pair of rearwardly extending flanges 26 mounted on a plate 28.
  • the extremities of the brackets 24 each contain an aperture.
  • the brackets 24 are pivotally mounted between the flanges 26 on a circular rod 30.
  • an hydraulic piston and cylinder assembly 32 is pivotally mounted between a further rearward facing bracket 34 on the arm 18 and a circular rod 36 mounted between the flanges 26 (see also Figures 1 and 2).
  • the purpose of the hydraulic piston and cylinder assembly 32 will be described hereinafter.
  • the plate 28 At its lower end as seen in Figure 4, the plate 28 has a further pair of rearwardly extending flanges 37.
  • a stabilising roller 38 is rotatably mounted between the flanges 37.
  • an hydraulic motor 40 is mounted to the rear of the .plate 28 between the flanges 26 and 36. The hydraulic motor 40 is in driving connection with the cutter member 22. In the embodiment shown, the hydraulic motor 40 drives the cutter member 22 by means of a shaft and reduction gear assembly.
  • the cutter member 22 is mounted to the drive from the hydraulic motor 40 and is spaced from the plate 28 by means of stationary spacer 42.
  • the cutter member 22 comprises an annular disc 44 having welded thereto a flat circular back plate 46.
  • the back plate has a rear surface ' welded to the annular disc 44 and a front surface having mounted thereon various blades as will be described.
  • each blade 50 there is welded to the front surface of the back plate 46 a cylindrical drum 48 which is mounted on the back plate 46 concentrically therewith.
  • a plurality of radially spaced slinger blades 50 are embedded in the back plate 46.
  • the blades 50 each have an inner edge which is welded to the periphery of the drum 48 and a rear side which is welded to the back plate 46. Further, each blade 50 extends generally forwardly from the back plate 46.
  • each blade 50 So as to positively locate each blade 50 on the back plate 46 and prevent flexing and breakage during use each blade 50 is embedded in and so positively engaged with with the back plate 46.
  • a face cutting blade 52 is welded to the forward edge of the periphery of the drum 48.
  • Each face cutting blade 52 terminates at a point radially inward of the periphery of the back plate 46.
  • each face cutting blade 52 extends at an angle to the back plate 46.
  • the forward edge of each cutting Blade 52 is thus preferably located further away from the back plate 46 than the trailing edge as the cutter is rotated (in the clockwise direction as seen in Figure 3). It is also found that most wear takes place at the outer ends of the forward edges of the cutting blades 52. Therefore, a wear resistant tip 54 is preferably bolted onto each blade 52.
  • the wear resistant tips are L-shaped and the leg of the L-shape is bolted to a respective blade 52.
  • the leg of the L-shape extends forwardly and radially outwardly of the blade 52 and thus in use protects the blade 52 from wear.
  • the tip 54 can be readily removed and replaced by a fresh tip 54.
  • each L-shaped tip 54 extends rearwardly and forms an invert cutting blade.
  • the invert cutting blades shape the lower end of the trench following thecutting of the trench base and give it a neat concave shape.
  • leg of the L-shape extends radially outwardly so as to extend to a point radially outward of the periphery of the backing plate 46.
  • the base of the L-shape is also located radially outward of the periphery of the backing plate 46.
  • each blade 52 preferably abuts a side of a forwardly extending blade 50 for greater rigidity in use. Also, the leading edge of each blade 52 may terminate at its inner end in contact with the next leading forwardly extending blade 50.
  • the prime mover 10 is moved to a location at which it is desired to dig a trench with the trench cutter assembly in the position shown in Figure 1. Then the arm 18 is lowered by contraction of the hydraulic piston and cylinder assembly 20 to the position shown in Figure 2.
  • the hydraulic piston and cylinder assembly 32 is extended so as to pivot the trench cutter 22 on the mounted to the arm 18. In this position the forward end of the cutter member 22 is tilted downwardly. Then the cutter member 22 is caused to rotate on its axis by the hydraulic motor 40.
  • the cutting blades 52 and tips 54 excavate a fact in front of the cutter member 22 until the desired depth of cut is achieved. Then the hydraulic piston and cylinder assembly 32 is contracted to return the cutter member 22 to the position shown in Figure 4. The prime mover 10 is moved forward slowly while rotation of the cutter member 22 continues. The blades 52 and tips 54 excavate the face of the trench and thereby extend its length in the direction of movement. The prime mover 10 is moved in a direction parallel to the intended location of the trench and the trench is formed at the side of the prime mover.
  • the bases of the L-shaped tips 54 shape the trench to the desired concave shape. Further, the blades 50 remove the spoil from the trench and deposit it on the side of the trench.
  • the stabilising roller 38 rolls along the bottom of the formed trench behind the cutter member 22 and ! assists in maintaining the cutter member 22 in the desired orientation. The cutting is continued until the trench has been cut to the desired length. Then the arm 18 is raised by extension of the hydraulic piston and cylinder assembly 20 to remove the cutter member 22 from the trench so that the whole assembly can be moved to another location.
  • cutter member 22 be in alignment with a rear wheel of the prime mover since it is found that in use this reduces steering problems.
  • hydraulic motor 40 could drive into a planetary gear arrangement to impart rotation to the cutter member 22.
  • pivotally mounted arm 18 is bent through a right angle and is pivoted on a pin 19 in the frame member 19.
  • the apparatus comprises an hydraulic piston and cylinder assembly 60 having one end pivotally mounted on the arm 18 and the other end pivotally mounted on the mounting for the rotary cutter member 22.
  • the hydraulic piston and cylinder assembly 60 is contracted or extended as required to maintain the cutter member 22 in a desired orientation with the roller 38 lowermost, as the arm 18 is pivoted between its transport and operative position.
  • the mounting to the arm 18 preferably comprises a rotatably mounted pin 62 mounted on a socket in the second end of the arm 18.
  • the pin 62 is rigidly connected at one end to a vertical post 64 having its lower end pivotally mounted between the plates 26 or a pin 66.
  • the plates 26 extend continuously downwardly to provide the mounting for the roller ' 38.
  • the hydraulic piston and cylinder assembly for tilting the cutter member 22 is horizontally dispersed having one end pivotally connected to the upper end of the post 64 by a bracket 34 and the other end pivotally mounted between the plates 26 on a pin 36.
  • the hydraulic piston and cylinder assembly 32 is contracted or extended as described above to obtain the desired amount of tilt of cutter member 22.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Harvester Elements (AREA)
EP81303595A 1980-06-06 1981-08-06 Grabenfräse Withdrawn EP0071677A1 (de)

Priority Applications (3)

Application Number Priority Date Filing Date Title
AU71200/81A AU7120081A (en) 1980-06-06 1980-06-06 Trench cutter
EP81303595A EP0071677A1 (de) 1980-06-06 1981-08-06 Grabenfräse
ZA815409A ZA815409B (en) 1980-06-06 1981-08-06 Trench cutter

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
AU71200/81A AU7120081A (en) 1980-06-06 1980-06-06 Trench cutter
EP81303595A EP0071677A1 (de) 1980-06-06 1981-08-06 Grabenfräse
ZA815409A ZA815409B (en) 1980-06-06 1981-08-06 Trench cutter

Publications (1)

Publication Number Publication Date
EP0071677A1 true EP0071677A1 (de) 1983-02-16

Family

ID=27155908

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81303595A Withdrawn EP0071677A1 (de) 1980-06-06 1981-08-06 Grabenfräse

Country Status (3)

Country Link
EP (1) EP0071677A1 (de)
AU (1) AU7120081A (de)
ZA (1) ZA815409B (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4664791A (en) * 1986-02-07 1987-05-12 Mcclain Ray Padding machines
AU594078B2 (en) * 1985-08-14 1990-03-01 John Curtis Bayliss Improvements to trench digging apparatus
GB2253644A (en) * 1991-03-15 1992-09-16 Tamrock World Corp Cutter drum assembly for a mining machine
USRE34289E (en) * 1986-02-07 1993-06-22 Ray Mcclain, Inc. Padding machines

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU714515B2 (en) * 1996-09-03 2000-01-06 Redland Shire Council Runnelling machine

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB748459A (en) * 1953-07-14 1956-05-02 Nat Res Dev Improvements in or relating to ditching machines
GB937403A (en) * 1959-10-17 1963-09-18 Fritz Bartels Improvements in or relating to ditch digging and like excavating apparatus
FR1501207A (fr) * 1965-11-03 1967-11-10 Webster Equipment Ltd Perfectionnement aux excavatrices
FR1545469A (fr) * 1966-11-30 1968-11-08 Lothar Trenkle K G Machine excavatrice de fossés
FR1601296A (de) * 1968-12-31 1970-08-10
FR1604301A (de) * 1968-12-23 1971-10-11

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB748459A (en) * 1953-07-14 1956-05-02 Nat Res Dev Improvements in or relating to ditching machines
GB937403A (en) * 1959-10-17 1963-09-18 Fritz Bartels Improvements in or relating to ditch digging and like excavating apparatus
FR1501207A (fr) * 1965-11-03 1967-11-10 Webster Equipment Ltd Perfectionnement aux excavatrices
FR1545469A (fr) * 1966-11-30 1968-11-08 Lothar Trenkle K G Machine excavatrice de fossés
FR1604301A (de) * 1968-12-23 1971-10-11
FR1601296A (de) * 1968-12-31 1970-08-10

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU594078B2 (en) * 1985-08-14 1990-03-01 John Curtis Bayliss Improvements to trench digging apparatus
US4664791A (en) * 1986-02-07 1987-05-12 Mcclain Ray Padding machines
USRE34289E (en) * 1986-02-07 1993-06-22 Ray Mcclain, Inc. Padding machines
GB2253644A (en) * 1991-03-15 1992-09-16 Tamrock World Corp Cutter drum assembly for a mining machine
AU646324B2 (en) * 1991-03-15 1994-02-17 Eimco Llc Vane type conveyor for a mining machine drum
GB2253644B (en) * 1991-03-15 1995-03-08 Tamrock World Corp Vane type conveyor for a mining machine drum

Also Published As

Publication number Publication date
ZA815409B (en) 1982-08-25
AU7120081A (en) 1981-12-10

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Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): AT BE CH DE FR GB IT LI LU NL SE

17P Request for examination filed

Effective date: 19830730

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19841016