US3580406A - Earthworking machine - Google Patents

Earthworking machine Download PDF

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Publication number
US3580406A
US3580406A US850941A US3580406DA US3580406A US 3580406 A US3580406 A US 3580406A US 850941 A US850941 A US 850941A US 3580406D A US3580406D A US 3580406DA US 3580406 A US3580406 A US 3580406A
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United States
Prior art keywords
quadrilateral
jib
pivoted
earthworking
arms
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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.)
Expired - Lifetime
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US850941A
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English (en)
Inventor
Jean-Pierre B Bellart
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Poclain SA
Original Assignee
Poclain SA
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Filing date
Publication date
Application filed by Poclain SA filed Critical Poclain SA
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Publication of US3580406A publication Critical patent/US3580406A/en
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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
    • E02F3/307—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 the boom and the dipper-arm being connected so as to permit relative movement in more than one plane

Definitions

  • the invention relates to an earthworking machine in which an earthworking implement, such as a drag bucket, is carried by extensible and retractable means to effect forward and backward movement of the bucket, the invention consisting in an improved form of extensible and retractable means which comprises two pairs of arms pivoted together to form a deformable quadrilateral which is pivoted at one of its ends to the jib and has pivoted to its other end the bucket assembly.
  • SHEET 0F 4 Inventor JEAN-Pane B. BELLART yi Attorneys EARTIIWORKING MACHINE
  • This invention relates to an earthworking machine, such as a mechanical excavator, of the type comprising a turret, a jib pivotally mounted on said turret longitudinally extensible and retractable means mounted on said jib and an earthworking implement pivotally mounted on said extensible and retractable means.
  • Earthworking machines of this type are designed for carrying out earthworking operations on or forming sloping banking and the purpose of the extensible and retractable means is to enable the earthworking implement, such as a drag bucket, to be moved backwards and forwards up and down banking whilst the machine on which the turret is mounted remains on level ground above the banking.
  • the extensible and retractable means hitherto employed consisted of telescopic means associated with the jib. Such telescopic means, while operating satisfactorily, has the disadvantage that it occupies considerable space, even in the retracted position, and relatively heavyguide means for the telescopic parts have to be provided to ensure satisfactory functioning of the machine.
  • the object of the present invention is to overcome the above-stated disadvantage and according to the invention this is achieved by substituting for the above described telescopic means an extensible and retractable means which comprises two pairs of arms with all of said arms pivotally connected at their ends to form a deformable quadrilateral, said quadrilateral being pivotally connected to said jib and having an earthworking implement assembly pivoted thereto and wherein ram means are connected between said jib and said quadrilateral for deforming said quadrilateral to effect longitudinal extension and retraction of said quadrilateral.
  • the quadrilateral is pivoted to the jib and the earthworking is pivoted to the quadrilateral respectively at two opposite apices of said quadrilateral for pivotal movement about axes perpendicular to the pivotal axis of said jib and the ram means are connected respectively between the jib and each of a pair of adjacent arms of the quadrilateral by which said quadrilateral is pivoted to the jib.
  • FIG. 1 is a side elevation of an earthworking machine according to the invention shown operating on a sloping bankmg;
  • FIG. 2 is a plan view of the extensible and retractable means of the machine according to FIG. 1;
  • FIG. 3 is a part side elevational view showing a modification of the machine shown in FIG. I;
  • FIG. 4 is a part plan view of the modification shown in FIG.
  • FIG. 5 is a view similar to FIG. I of another embodiment of the invention.
  • FIGS. 6 and 7 are plan views of the extensible and retractable means according to the embodiment of FIG. 5 showing said means in the retracted and extended conditions respectively;
  • FIG. 8 is a diagrammatic view of hydraulic control means for operating the rams for effecting the extension and retraction of the extensible and retractable means.
  • FIG. 9 is a circuit diagram illustrating hydraulic means for controlling operation of said rams.
  • the earthworking machine comprises a chassis 17 mounted on endless tracks and having mounted thereon a turret 18 rotatable about a vertical axis.
  • a jib l is pivotally mounted on the turret 18 for pivotal movement about a horizontal axis 2 by means of an hydraulic ram 3 arranged between said turret 18 and the jib I.
  • extensible and retractable means are mounted on said jib so as to be extensible and retractable in a direction longitudinally of said jib and an earthworking implement assembly in the embodiment shown comprising a drag bucket 11, is pivotally mounted on said extensible and retractable means.
  • the extensible and retractable means comprises two pairs of arm 5, 6 and 13, 14 which are pivotally connected together at their ends by pivots 4, 9, 19 and 20 to form a deformable quadrilateral.
  • the arms 5, 6, 13 and 14 are of equal length.
  • the quadrilateral 5, 6, 13, 14 is pivotally connected to the end of the jib l at 4 and the earthworking implement assembly 10, ll, 12 is pivotally mounted on said quadrilateral at 9.
  • the quadrilateral is pivoted to the jib and the earthworking implement assembly at two opposite apices of said quadrilateral for movement about axes 4 and 9 which are perpendicular to the pivotal axis 2 of the jib.
  • each of the adjacent arms 5 and 6, by which the quadrilateral is pivoted to the jib l, and said jib is an hydraulic ram 8 and 7 respectively, said rams being pivotally connected with the jib at 8a and 7a respectively, and to a point intermediate and ends of arms 5 and 6 at 8b and 7b respectively.
  • the axes 7a and 8a are equidistant from the axis 4 as are the axes 7b and 8b.
  • the two adjacent arms 5 and 6 may be pivoted together at 4 by the same pivot pin as the quadrilateral is pivoted to the jib or two pivot pins may be provided. It will be noticed that the axes 7a, 7b, 8a, 8b, 4, 9, l9 and 20 are all perpendicular to the axis 2 about which the jib pivots.
  • the earthworking implement assembly comprises an intermediate member 10, of any desired length, which is pivoted to the quadrilateral at 9 for pivotal movement in a lateral plane and an earthworking implement in the form of a drag bucket 11 pivotally connected with said intermediate member 10 at 32 for movement in a vertical plane.
  • an hydraulic ram 12 for effecting pivotal movement of said bucket in a vertical plane about axis 32.
  • abutments 15a and 16a with which opposite parts 15b and 16b on the arms 13 and 14 abut when the quadrilateral is in its retracted position thereby limiting the pivotal movement of said arms in one direction.
  • the arms 5 and 6 of the quadrilateral are not pivoted directly to jib l, as in the previously described embodiment, but are pivoted at 4 to an intermediate piece 33 which in turn is pivoted to the jib at 35, the pivotal axis 35 being parallel to the axis 2 about which the jib pivots.
  • a single hydraulic ram 34 is connected between the jib l and the intermediate piece 33 for effecting pivotal movement the the quadrilateral and the earthworking implement carried thereby in a vertical plane.
  • the arms of the quadrilateral are not all of equal length, as in the previously described embodiments, but having pairs of equal length, thus the pair of arms 5a, 6a by which the quadrilateral is pivoted to the jib 1 are of equal length and the pair of arms 13a, 14a, are of equal length but arms 13a 14a, are of greater length than the arms 5a, 6a.
  • abutments such as 15a, and 16b in the FIG. 2 embodiment since in the retracted position of the quadrilateral, shown in FIG. 6, the arms 13a, 14a do not reach a position in which they contact the intermediate piece 10.
  • the machine When it is desired to form a sloping banking such as is shown in FIGS. ll, 3 and 5, the machine is appropriately positioned at the site; the jib 1 is positioned in the raised or horizontal position by means of the hydraulic ram 3; the deformable quadrilateral 5, 6, l3, 14 is then positioned in its extended position by rams 7 and 8; the jib is then lowered by ram 3 until the drag bucket is lowered into contact with the ground; pressure fluid is then fed to rams 7 and 8 to cause said rams to retract and consequently retract the deformable quadrilateral thereby causing the drag bucket to be pulled towards the machine scraping soil with it.
  • FIG. 3 The embodiment of machine shown in FIG. 3 is operated in a similar manner to that of FIG. 1 except that by virtue of rams 3 and 34 it has the advantage over the first-described embodiment that it permits a greater range of adjustment of the jib above the ground without adversely affecting the function of the machine.
  • the bucket is moved into contact with the ground by the combined actions of rams 3 and 34.
  • the embodiment according to FIGS. 5 to 7 has the advantage that it permits the arms 5a and 6a of the deformable quadrilateral to be moved back past the axis 4 in the retracted position of the quadrilateral with the result that with the same stroke the space occupied by the implement assembly is less than that occupied by said assembly in the FIG. I embodiment.
  • An advantage of using the hydraulic control means illustrated in FIG. 9 is that it ensures that the rams 7 and 8 are supplied with pressure fluid in parallel by like action of distributors 37 and 38, thereby retaining the advantage accruing from the oscillation or sinuous movement of the bucket 11.
  • the bucket'can be locked in any position, which increases safety, and by differential action of the distributors 37 and 33 guiding of the bucket in the working plane according to a predetermined path is ensured.
  • each quadrilateral having two of its arms connected with two arms of an adjacent quadrilateral, thus increasing the stroke of the implement assembly.
  • the rams controlling the extension and retraction are preferably operated in parallel they could be controlled independently whereby orientation with respect to the jib of the deformable quadrilateral and extension and retraction thereof could be effected simultaneously.
  • An earthworking machine such as a mechanical excavator, comprising a turret, a jib pivotally mounted on said turret, longitudinally extensible and retractible means mounted on said jib and an earthworking implement pivotally mounted on said extensible and retractible means, wherein said extensible and retractable means comprises two pairs of arms with all of said arms pivotally connected at their ends to form a deformable quadrilateral, said quadrilateral being pivotally connected to said jib and having an earthworking implement assembly pivoted thereto and wherein ram means are connected between said jib and said quadrilateral for deforming said quadrilateral to effect longitudinal extension and retraction of said quadrilateral.
  • An earthworking machine such as a mechanical excavator, comprising a rotatable turret, a jib pivotally mounted on said turret, longitudinally extensible and retractable means mounted on said jib and an earthworking implement assembly pivotally mounted on said extensible and retractable means, wherein said extensible and retractible means comprises two pairs of arms with all of said arms pivotally connected together at their ends to form a deformable quadrilateral, the quadrilateral being pivoted to the jib and the earthworking implement assembly being pivotally mounted on the quadrilateral respectively at two opposite apices of said quadrilateral for movement about axes perpendicular to the pivotal axis of said jib and wherein rams are connected respectively between the jib and each of a pair of adjacent arms of the quadrilateral by which said quadrilateral is pivoted, to the jib.
  • an earthworking machine comprising an intermediate member pivoted to the quadrilateral, an earthworking implement pivoted to said intermediate member, and ram means connected between said intermediate member and said implement for pivoting said implement.

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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)
  • Earth Drilling (AREA)
US850941A 1968-09-05 1969-08-18 Earthworking machine Expired - Lifetime US3580406A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR165170 1968-09-05

Publications (1)

Publication Number Publication Date
US3580406A true US3580406A (en) 1971-05-25

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ID=8654269

Family Applications (1)

Application Number Title Priority Date Filing Date
US850941A Expired - Lifetime US3580406A (en) 1968-09-05 1969-08-18 Earthworking machine

Country Status (6)

Country Link
US (1) US3580406A (fr)
BE (1) BE771445Q (fr)
DE (1) DE1943382A1 (fr)
ES (1) ES371121A1 (fr)
FR (1) FR1587704A (fr)
GB (1) GB1274102A (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3010590A (en) * 1959-11-19 1961-11-28 Robert G Troth Hydraulic fork
US3224608A (en) * 1963-01-15 1965-12-21 Universal Marion Corp Earth working and materials handling machine

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3010590A (en) * 1959-11-19 1961-11-28 Robert G Troth Hydraulic fork
US3224608A (en) * 1963-01-15 1965-12-21 Universal Marion Corp Earth working and materials handling machine

Also Published As

Publication number Publication date
ES371121A1 (es) 1971-08-16
BE771445Q (fr) 1971-12-31
GB1274102A (en) 1972-05-10
DE1943382A1 (de) 1970-03-12
FR1587704A (fr) 1970-03-27

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