GB2025360A - Excavator with articulated arms - Google Patents

Excavator with articulated arms Download PDF

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Publication number
GB2025360A
GB2025360A GB7920431A GB7920431A GB2025360A GB 2025360 A GB2025360 A GB 2025360A GB 7920431 A GB7920431 A GB 7920431A GB 7920431 A GB7920431 A GB 7920431A GB 2025360 A GB2025360 A GB 2025360A
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GB
United Kingdom
Prior art keywords
articulated
arm
platform
pin
pivot pin
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.)
Granted
Application number
GB7920431A
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GB2025360B (en
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BREFER SpA
Original Assignee
BREFER SpA
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Publication date
Application filed by BREFER SpA filed Critical BREFER SpA
Publication of GB2025360A publication Critical patent/GB2025360A/en
Application granted granted Critical
Publication of GB2025360B publication Critical patent/GB2025360B/en
Expired 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
    • E02F3/28—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
    • E02F3/30—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 with a dipper-arm pivoted on a cantilever beam, i.e. boom
    • E02F3/302—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 with a dipper-arm pivoted on a cantilever beam, i.e. boom with an additional link
    • 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
    • E02F3/30—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 with a dipper-arm pivoted on a cantilever beam, i.e. boom
    • E02F3/32—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 with a dipper-arm pivoted on a cantilever beam, i.e. boom working downwardly and towards the machine, e.g. with backhoes

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Operation Control Of Excavators (AREA)
  • Shovels (AREA)
  • Earth Drilling (AREA)

Abstract

An excavator has a self propelled truck (10) which rotatably supports a platform (16). A first arm (24) is articulated by a lateral pivot pin (26) near a peripheral edge of the platform (16), its pivotal movement about the pin (26) being controlled by a jack (28) itself articulated by a pin (32) at one end to the platform near the pin (26). At the free end of the first arm (24) is articulated one end of a second arm (48), an excavating member such as a bucket scoop (22) being articulated to the opposite end of the second arm (48). The opposite end of the jack (28) is articulated at a common pivot (36) to one end of each of a pair of levers (38, 40), the outer end of one lever (38) being articulated by a pin (44) to a central portion of the first arm (24) whilst the outer end of the second lever (40) is articulated by a pin (42) to the platform (16) near the pin (26). When the platform (16) is substantially horizontal and the first arm (24) is fully raised, the vertical projections of both levers (38, 40) lie within the platform (16). <IMAGE>

Description

SPECIFICATION Excavator with articulated arms The present invention relates to excavators with articulated arms.
According to the present invention, there is provided an excavator comprising a support truck or trolley; a platform rotatably supported by the support trolley; a first arm articulated at one end about a laterally extending pivot pin supported by the platform in the vicinity of a peripheral edge of the platform; a second arm articulated at one end to the free end of the first arm; an excavating member articulated to the free end of the second arm; and means for controlling the angular movement of said first and second arms of the excavating member about their respective articulations, said control means including means.
for pivoting the first arm about said lateral pivot pin comprising a jack articulated as one end to the platform in the vicinity of said lateral pivot pin of said first arm two levers both articulated at one end to a common pivot pin to which is also articulated the other end of the jack, the opposite end of one of the two levers being articulated to the platform in the vicinity of said lateral pivot pin of the first arm, and the opposite end of the other of said two levers being articulated to the central portion of the first arm, the arrangement being such that when the platform is substantially horizontal and the first arm is raised to a maximum extent about said lateral pivot pin, the vertical projections of both said two levers are located inside the platform.
Thus the present invention provides an excavator in which the first arm articulated to the platform may be piyoted downwards into a position substantially perpendicular to the platform, using control means which are particularly simple and of quite compact dimensions, in such a way as to enable the excavating member, e.g. a bucket scoop, to operate so as to produce deep excavations close to the excavator.
One embodiment of the invention will now be described by way of example, with reference to the accompanying drawings, in which: Figure 1 is a diagrammatic view in side elevation of an excavator according to the invention, and Figure 2 is a diagrammatic view in side elevation and on an enlarged scale of the means for controlling the angular movement of the first arm of the excavator illustrated in Figure 1.
Referring to the drawings, an excavator according to the invention comprises a selfpropelled support truck or trolley 10 mounted on wheels 12. Hydraulic means are provided (not shown in the drawings) which are capable of allowing the track of the excavator to be widened during the excavation operations.
On the support trolley 10 there is mounted a centre plate or pivot 14 which supports a platform 1 6 which can be rotated in a lateral, usually horizontal plane.
On the platform 16 there are mounted an operating cab 1 8 and a kinematic mechanism with articulated arms, designated in its entirety by 20, for supporting an excavating member, in this instance a bucket scoop 22.
The kinematic mechanism 20 comprises a first arm 24 articulated at one end to the platform 1 6 by a horizontal i.e. laterally extending pivot pin 26 which is supported by the platform 16 close to the peripheral edge thereof. The first arm 24 can be controlled soss to pivot about the pin 26 between a first end position (indicated in solid lines in Figures 1 and 2), in which the arm 24 is directed upwards, and a second end position (indicated in chain lines in Figure 2), in which the arm 24 is directed downwards substantially perpendicular to the platform 1 6.
The control of the angular movement of the first arm 24 is effected by means of a hydraulic jack 28 of which cylinder 30 is articulated to the platform 16 by a pivot pin 32 arranged adjacent and parallel to the pin 26, the piston rod 34 of the jack 28 being articulated about a pivot pin 36 parallel to pin 32. One end of each of two levers 38, 40 are also articulated about the pin 36. The opposite end of the lever 38 is articulated to the central portion of the pivot arm 24 by a pin 44, parallel to pin 36, while the opposite end of lever 40 is articulated to the platform close to pins 26 and 32 by a pin 42 parallel to pins 26, 32.
The position of the pin 36 relative to the first arm 24 is such that when the platform is substantially horizontal and the first arm 24 is in its first end position, i.e. the position corresponding to maximum lifting of the first arm 24, the vertical projections of the levers 38, 40 are located inside the platform 16, i.e. the levers 38, 40 is wholly directly above the platform 16. This position of the first arm 24 is achieved when the hydraulic jack 28 is fully extended, whereas the opposite end position of the first arm 24 is achieved when the hydraulic jack 28 is fully retracted.
The free end of the first arm 24 supports a laterally extending pin 46 about which is articulated one end of a second arm 48. This end of the second arm 48 is also articulated to the end of the piston rod of a hydraulic control jack 50, the cylinder of which is articulated to the first arm 24 in the vicinity of the pin 44.
The bucket scoop 22 is articulated to the other end of the second arm 48, the angular displacement of the bucket scoop being controlled by means of a hydraulic control jack 52 whose cylinder is articulated to the second arm 48 in the vicinity of the pin 46, and whose piston rod is articulated to a bell crank lever 58 of which the two arms are respectively articulated to the second arm 48 and to a lever 60 in turn articulated to the bucket scoop 22.
The above-described design of the kinematic mechanism 20 enables the bucket scoop 22 to carry out working strokes of differing configurations, e.g. in the arc of a circle or in a straight line. Moreover, this kinematic mechanism 20, being of compact dimensions enables the bucket scoop 22 to be used for deep excavations even close to the excavator platform.

Claims (3)

1. An excavator comprising: a support truck or trolley; a platform rotatably supported by the support trolley; a first arm articulated at one end about a laterally extending pivot pin supported by the platform in the vicinity of a peripheral edge of the platform; a second arm articulated at one end to the free end of the first arm; an excavating member articulated to the free end of the second arm; and means for controlling the angular movement of said first and second arms and of the excavating member about their respective articulations, said control means including means for pivoting the first arm about said lateral pivot pin comprising a jack articulated at one end to the platform in the vicinity of said lateral pivot pin of said first arm, two levers both articulated at one end to a common pivot pin to which is also articulated the other end of the jack, the opposite end of one of the two levers being articulated to the platform in the vicinity of said lateral pivot pin of the first arm, and the opposite end of the other of said two levers being articulated to the central portion of the first arm, the arrangement being such that when the platform is substantially horizontal and the first arm is raised to a maximum extent about said lateral pivot pin, the vertical projections of both said two levers are located inside the platform.
2. An excavator as claimed in claim 1, in which.
the excavating member is a bucket scoop.
3. An excavator with articulated arms, substantially as hereinbefore described with reference to and as illustrated in the accompanying drawing.
GB7920431A 1978-07-10 1979-06-12 Excavator with articulated arms Expired GB2025360B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT68623/78A IT1108073B (en) 1978-07-10 1978-07-10 ARTICULATED ARM EXCAVATOR

Publications (2)

Publication Number Publication Date
GB2025360A true GB2025360A (en) 1980-01-23
GB2025360B GB2025360B (en) 1982-08-25

Family

ID=11310061

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7920431A Expired GB2025360B (en) 1978-07-10 1979-06-12 Excavator with articulated arms

Country Status (4)

Country Link
DE (1) DE2927825A1 (en)
FR (1) FR2431005A1 (en)
GB (1) GB2025360B (en)
IT (1) IT1108073B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0670391A1 (en) * 1994-03-04 1995-09-06 MANITOU COSTRUZIONI INDUSTRIALI Srl A compact multi-use mobile work tool
FR2856884A1 (en) * 2003-07-01 2005-01-07 Kuhn Audureau Sa Plant cutting machine, has hydraulic jack that is articulated between interior segment and connecting rod, where rod is articulated on interior segment by axle and on another connecting rod on frame

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1249975A (en) * 1959-11-26 1961-01-06 Potain & Cie Ets F Mechanical excavators improvements
FR2365008A1 (en) * 1976-09-17 1978-04-14 Pingon Manubat Sa Two piece excavator boom - has adjustable piece at elbow joint enabling position jib fulcrum and boom length to be varied

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0670391A1 (en) * 1994-03-04 1995-09-06 MANITOU COSTRUZIONI INDUSTRIALI Srl A compact multi-use mobile work tool
FR2856884A1 (en) * 2003-07-01 2005-01-07 Kuhn Audureau Sa Plant cutting machine, has hydraulic jack that is articulated between interior segment and connecting rod, where rod is articulated on interior segment by axle and on another connecting rod on frame

Also Published As

Publication number Publication date
GB2025360B (en) 1982-08-25
DE2927825A1 (en) 1980-01-24
IT7868623A0 (en) 1978-07-10
FR2431005A1 (en) 1980-02-08
IT1108073B (en) 1985-12-02

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Legal Events

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PCNP Patent ceased through non-payment of renewal fee