US3923172A - Device for rigidly assemblying two elements of a jib of a public works machine - Google Patents

Device for rigidly assemblying two elements of a jib of a public works machine Download PDF

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Publication number
US3923172A
US3923172A US522909A US52290974A US3923172A US 3923172 A US3923172 A US 3923172A US 522909 A US522909 A US 522909A US 52290974 A US52290974 A US 52290974A US 3923172 A US3923172 A US 3923172A
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United States
Prior art keywords
jib
elements
articulated
connecting rods
boom
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Expired - Lifetime
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US522909A
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English (en)
Inventor
Christian S Jankowiak
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Poclain SA
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Poclain SA
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    • 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
    • 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
    • E02F3/301—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 more than two arms (boom included), e.g. two-part boom with additional dipper-arm
    • 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
    • E02F3/304—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 the dipper-arm slidably mounted on the boom

Definitions

  • ABSTRACT This invention relates to a device for rigidly assembling the two elements of a jib of a public works machine, in which the connection of the two elements is ensured by two means of articulating one element on the other.
  • This device comprises two connecting rods, one end of each being articulated on the pre-boom.
  • One application is the production of a jib of adjustable length.
  • This device comprises two connecting rods, one end of each being articulated on the pre-boom.
  • One application is the production of a jib of adjustable length.
  • the present invention relates to a device for rigidly assembling two elements of a jib of a public works machine.
  • a number of public works machines are provided with jibs carrying a work tool. Now, according to the nature of the work to be carried out, it has often appeared desirable to use a jib of adjustable length, although rigid in its working lay-out.
  • the invention proposes such an adjustable jib, which is of simple and inexpensive constitution.
  • the invention has for its object a device for rigidly assembling the two elements of a jib, of a public works machine, in which the two elements are connected by two means for articulating them to each other, this device comprising at least one first connection rod (or set of parallel connecting rods), articulated on each of the elements of the jib.
  • the device comprises a second connecting rod (or a second set of parallel connecting rods), also articulated on each of the elements of the jib, the first and second rods (or sets of rods) being articulated on one of the elements of the jib about the same axis.
  • One of the elements of the jib advantageously comprises an adjustable stop enabling the other element to be supported.
  • the stop is preferably disposed in the zone of the bearing face of the other element containing the perpendicular to this face passing through one of the articulations of said other element.
  • At least one of the elements comprises a plurality of articulation members intended to receive the members for assembling the end of a connecting rod, these articulation members preferably being disposed in a line.
  • FIGS. la to 1d show elevations of four distinct layouts of an embodiment of a hydraulic shovel according to the invention
  • FIG. 2 is a view in the direction of arrow G of FIG. 1b;
  • FIG. 3 shows in detail a variant embodiment of the shovel shown in FIGS. la to 1d.
  • the shovel shown in FIG. la comprises:
  • pre-boom 5a articulated to the turret 3a about a horizontal axis 6a
  • balance beam 8a articulated on the jib 7a about a horizontal axis 9a, parallel to axis 6a, and
  • Jacks 12a, and 13a and 14a are coupled between the turret 3a and the pre-boom 5a, between the jib 7a and balance beam 8a, and between the balance beam 8a and the bucket 10a, respectively, so as to allow, in manner known per se, the adjustment of the relative positions of these various elements. It should be noted that the bucket has been driven into the ground 15 and may be considered as being immobile with respect thereto.
  • this element comprises a plurality of holes 16a, 17a, 18a, 19a and 20a, which follow one another from the end of this jib opposite axis 9a and which are disposed in a straight line 21a substantially parallel to the axisof said jib.
  • a pin 30a is mounted at the end of the pre-boom 5a opposite axis 6a.
  • Four connecting rods, two connecting rods 31a and two connecting rods 32a are articulated, by one of their ends, about this axis 30a, one connecting rod 31a and one connecting rod 32a on each side of the pre-boom 5a.
  • the end of the pre-boom 5a is furthermore provided with two bearing faces 33a and 34a forming stops, on which the lower face 35a of the jib 7a may abut, substantially at right-angles to the perpendiculars 45 dropped by axes 16a and 17a respectively to said face 35a.
  • a pin 36a is introduced in the other end hole in connecting rods 31a and in the hole 16a of the jib 7a, whilst, in similar manner, a pin 37a is introduced into the other end hole in the connecting rods 32a and in the hole 17a of said jib 7a.
  • the jib 5a and pre-boom 7a thus assembled constitute what is commonly known as the jib of the shovel which is consequently rigid but made of two parts.
  • FIG. lb differs from that of FIG. la in that the pin 36a has been taken out of the hole 16a, so that the connecting rods initially disposed in 31a are now only suspended from pin 30a, at 3112.
  • FIG. 10 shows a third lay-out which follows from FIG. 1b by advancing the chassis 1a to la, the bucket remaining driven in the ground 15 at 10a.
  • the turret, preboom, jib and balance beam are now at 3c, 5c, 70 and 8c.
  • the holes initially at 16a, 17a, 18a, 19a and 20a and the axis initially at 30a are now disposed at 16c, 17c, 18c, 19c and 200, and 30c respectively.
  • the pin initially introduced at 37a into hole 17a of the jib is now at 37c in the hole 170.
  • the connecting rods 31a and 32a have come to 310 and 320, connecting rods 310 still suspended from axis 30c and connecting rods 32c connecting axes 30c and 370.
  • FIG. 1d differs from that of FIG. 10 in that a pin 36d (constituted by pin 36a of FIG. la) is introduced both in the holes of jib 7c and in the end holes of connecting rods 31d (disposed at 310 in the lay-out of FIG. 1c).
  • a triangular, thus rigid assembly device is found, which is constituted by connecting rods 32c and 31d and by the distance between holes l7c-18c of the jib 7c.
  • the dimensions of the rigid jib-preboom assembly have been modified and in fact reduced between the lay-out of FIG. la and that of FIG. Id.
  • the range of the assembly measured for example by the distance between axes 6a and 9a has been reduced to the distance between the new positions 6d and 9d of these axes.
  • this modification of the geometry of the jib-preboom assembly may be chosen satisfactorily as a function of the work to be carried out.
  • FIG. 2 shows that each connecting rod is provided with a boss 38b which makes it possible to compensate for the thickness of the connecting rods 32a which are disposed on the side of the jib 7a and pre-boom a, said jibs and pre-booms being of equal width.
  • FIG. 3 shows a variant embodiment of the pre-boom 5a.
  • One of the bearing faces 33a, 34a in the present case the support face 34a, is fast with a piston 39a which is mounted to slide in a cylinder 40a fast with the structure of the pre-boom 5a.
  • the cylinder 41a of a double-acting jack 42a is fixed to the structure of the pre-boom 5a by means of a flange 43a, whilst the piston rod 44a of the jack 42a is fast with the piston 39a.
  • the bearing faces 33a and 34a are convex and in fact practically cylindrical.
  • the connecting rods make it possible to modify the geometry of the rigidly assembled jib-preboom assembly without having to detach the jib entirely from the pre-boom, in order to effect the desired modification.
  • At least one connecting rod permanently connects these two elements of FIGS. la
  • a device for rigidly assembling the two elements ofajib of a public works machine in which the two elements are connected by two means of articulating them to each other, this device comprising at least one first connecting rod (or a set of parallel connecting rods), articulated on each of the elements of the jib, said device further comprising a second connecting rod (or a second set of parallel rods), also articulated on each of the elements of the jib, the first and second connecting rods (or set or rods) being articulated on one of the elements of the jib about the same axis.
  • one of the elements of the jib comprises, in manner known per se, an adjustable stop enabling the other element to be supported.
  • At least one of the elements comprises a plurality of articulation members intended to receive the members for assembling the end of a connecting rod.

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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)
  • Jib Cranes (AREA)
US522909A 1973-11-22 1974-11-11 Device for rigidly assemblying two elements of a jib of a public works machine Expired - Lifetime US3923172A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7341664A FR2252456B1 (de) 1973-11-22 1973-11-22

Publications (1)

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US3923172A true US3923172A (en) 1975-12-02

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US522909A Expired - Lifetime US3923172A (en) 1973-11-22 1974-11-11 Device for rigidly assemblying two elements of a jib of a public works machine

Country Status (11)

Country Link
US (1) US3923172A (de)
JP (1) JPS5085103A (de)
AR (1) AR204548A1 (de)
BE (1) BE821520A (de)
BR (1) BR7409504A (de)
CA (1) CA1011688A (de)
DE (1) DE2455362A1 (de)
ES (1) ES432053A1 (de)
FR (1) FR2252456B1 (de)
GB (1) GB1447699A (de)
IT (1) IT1025437B (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4293270A (en) * 1978-01-17 1981-10-06 J. C. Bamford Excavators Limited Excavators
US4405281A (en) * 1979-05-19 1983-09-20 O & K Orenstein & Koppel Aktiengesellschaft Hydraulic excavator with boom for large ranges of action and lifting heights
EP0113133A1 (de) * 1982-12-31 1984-07-11 De Rotterdamsche Droogdok Maatschappij B.V. Einrichtung zum Verbinden zweier gegeneinander verschiebbarer und in mehreren Stellungen feststellbarer Auslegerarme
US4728249A (en) * 1985-12-11 1988-03-01 The Gradall Company Telescoping boom assembly with longitudinally displaceable base boom section
WO2003021047A1 (en) * 2001-09-04 2003-03-13 Gerard O'brien Excavator assembly
US20060254096A1 (en) * 2005-05-16 2006-11-16 Denis Poire Quick attach coupling device

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3085695A (en) * 1961-03-23 1963-04-16 Carl A Miller Hinge for crane boom
US3148789A (en) * 1960-08-16 1964-09-15 Cie Des Engins Hydromecaniques Mechanical shovel capable of working as a lifting device or loader
US3358859A (en) * 1966-03-03 1967-12-19 Warner Swasey Co Material handling apparatus
US3465904A (en) * 1966-11-18 1969-09-09 Massey Ferguson Services Nv Adjustable boom for material handling equipment

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3148789A (en) * 1960-08-16 1964-09-15 Cie Des Engins Hydromecaniques Mechanical shovel capable of working as a lifting device or loader
US3085695A (en) * 1961-03-23 1963-04-16 Carl A Miller Hinge for crane boom
US3358859A (en) * 1966-03-03 1967-12-19 Warner Swasey Co Material handling apparatus
US3465904A (en) * 1966-11-18 1969-09-09 Massey Ferguson Services Nv Adjustable boom for material handling equipment

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4293270A (en) * 1978-01-17 1981-10-06 J. C. Bamford Excavators Limited Excavators
US4405281A (en) * 1979-05-19 1983-09-20 O & K Orenstein & Koppel Aktiengesellschaft Hydraulic excavator with boom for large ranges of action and lifting heights
EP0113133A1 (de) * 1982-12-31 1984-07-11 De Rotterdamsche Droogdok Maatschappij B.V. Einrichtung zum Verbinden zweier gegeneinander verschiebbarer und in mehreren Stellungen feststellbarer Auslegerarme
US4728249A (en) * 1985-12-11 1988-03-01 The Gradall Company Telescoping boom assembly with longitudinally displaceable base boom section
WO2003021047A1 (en) * 2001-09-04 2003-03-13 Gerard O'brien Excavator assembly
US20060254096A1 (en) * 2005-05-16 2006-11-16 Denis Poire Quick attach coupling device
US7565758B2 (en) * 2005-05-16 2009-07-28 Poire Denis Quick attach coupling device

Also Published As

Publication number Publication date
IT1025437B (it) 1978-08-10
BE821520A (fr) 1975-02-17
ES432053A1 (es) 1976-11-01
FR2252456B1 (de) 1976-11-19
AR204548A1 (es) 1976-02-12
FR2252456A1 (de) 1975-06-20
BR7409504A (pt) 1976-05-25
GB1447699A (en) 1976-08-25
JPS5085103A (de) 1975-07-09
DE2455362A1 (de) 1975-05-28
CA1011688A (en) 1977-06-07

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