US3848756A - Backhoe apparatus - Google Patents

Backhoe apparatus Download PDF

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Publication number
US3848756A
US3848756A US00337558A US33755873A US3848756A US 3848756 A US3848756 A US 3848756A US 00337558 A US00337558 A US 00337558A US 33755873 A US33755873 A US 33755873A US 3848756 A US3848756 A US 3848756A
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US
United States
Prior art keywords
frame
operating arm
column
arm
boom
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.)
Expired - Lifetime
Application number
US00337558A
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English (en)
Inventor
H Schaeff
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Individual
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Individual
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Filing date
Publication date
Priority claimed from DE19702012731 external-priority patent/DE2012731C3/de
Priority to FR7109122A priority Critical patent/FR2084685A5/fr
Application filed by Individual filed Critical Individual
Priority to US00337558A priority patent/US3848756A/en
Application granted granted Critical
Publication of US3848756A publication Critical patent/US3848756A/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • E02F3/38—Cantilever beams, i.e. booms;, e.g. manufacturing processes, forms, geometry or materials used for booms; Dipper-arms, e.g. manufacturing processes, forms, geometry or materials used for dipper-arms; Bucket-arms
    • E02F3/382—Connections to the frame; Supports for booms or arms
    • E02F3/384—Connections to the frame; Supports for booms or arms the boom being pivotable relative to the frame about a vertical axis

Definitions

  • ABSTRACT abandoned A backhoe apparatus or the like having a pivoting column for laterally pivotally connecting a shovel arm to [52] US. C1. 214/138 C, 214/131 A the device A Short operating arm connecting the [51] hit. C1 B66f 9/00 umn to a frame,and an extensible hydraulic cylinder 58 Field of Search 214/138 0, 138 R, 131 A having one end engaging the pivoting column laterally and having another end connected to the operating [56] References C'ted arm at a point adjacent the frame.
  • the invention relates to a backhoe apparatus, consisting of a frame which can be attached, by hooking, to the carrier vehicle.
  • the attachment is provided with lateral, hydraulically extensible supporting struts and with a pivoting column for pivoting the vertically movable shovel arm laterally.
  • the pivoting column is mounted on a slide, and is movable transversely to the vehicles longitudinal axis in guides on the frame.
  • Such construction adds to the problems of driving the pivoting column since, due to the mobility of the slide, the pivot drive cylinders must be supported by the slide instead of by the frame. Therefore, it is necessary to provide on the slide above or below the frame, lateral projections on which the hydraulic cylinders are hinged at a sufficient distance from the vertical axis of the pivoting column.
  • An attachable power shovel with backhoe scoop of the aforementioned kind is therefore characterized in that the pivoting column is fastened to the outer end of a short operating arm.
  • a hydraulic cylinder engaging the column laterally is fastened to the inner end of the short operating arm.
  • This arm in order to pivot a total of at least 90 under the action of a hydraulic cylinder supported on the frame, has its other end mounted on a vertical shaft provided on the frame.
  • a shaft operating arm is connected and made movable by means of a simple hydraulic cylinder. It is pivotable through an arc of about with sufficient torque, together with the attached pivoting column which is likewise driven by a single hydraulic cylinder with sufficient torque for pivoting the shovel arm with the operating tool approximately 1 10.
  • a total pivoting area of 200 results which when necessary can be increased without difficulties to 220 or 240.
  • the construction of the invention therefore differs from the shovels which are mounted with the pivoting column directly on the frame. It further fulfills the function of the known laterally displaceable shovels and surpasses the latter by having simplified construction, providing more stable structural elements, is more rapid and has more uses.
  • the shaft operating arm By using the shaft operating arm, the rear weight of the shovel is theoretically increased. However, this is irrelevant in operation since theshovel is secured by means of the lateral supporting struts. Further, the weight of the rear end is effectively provided only in the center position of the operating arm, whereas in the case of lateral pivoting the same as in the attachable shovels which are laterally movable on a slide. Moreover, the shaft shovel arm offers in the transporation of the shovel the possibility of retracting the shovel arm with the scoop holder and operating tool upward over the frame in order to displace the center of gravity of the shovel approximately to a point above the frame or even further in the direction of the carrier vehicle.
  • the vertical pivoting shaft of the operating arm may be arranged on the side of the frame which faces the carrier vehicle.
  • the frame contains an opening formed by upper and lower' transverse frame elements for positioning and pivoting the operating arm.
  • the opening in the frame is suitably formed by vertical lateral box sections with inner walls approximately parallel to the terminal pivot positions of the operating arm and by outer walls connected with the guide tubes of the supporting struts.
  • outward directed angle plates may be mounted on the outer ends of the upper transverse frame element, for the suspension of the supporting strut hydraulic cylinders. These angle plates are mounted in the path of corresponding slots in the ends of the supporting struts which are extensible upward from the guide tubes.
  • a lever supporting the arm cylinder may be mounted on the transverse shaft of the pivoting column, which shaft supports the shovel arm.
  • the direct pin connection of this lever to a lower fastening ear of the pivoting column is releasable and replaceable, after the pivoting of the lever, by a spacing bar.
  • the lever which for the transportation of the shovel is pivoted upward about the upper transverse shaft of the pivoting column to an extent corresponding to the length of the spacing bar, offers a new support position for the arm cylinder, wherefrom the shovel holder, including the scoop arm, can be pivoted further upward and back over the frame and possibly also partly over the carrier vehicle.
  • FIG. 1 is a side view of the power shovel of the invention
  • FIG. 2 is a plan view of the frame, operating arm and pivoting column of the power shovel of FIG. 1;
  • FIG. 3 is a side view of the constructional unit of FIG. 2;
  • FIG. 4 is a partial section of the frame as seen from the attachment side.
  • the side of a frame which faces the carrier vehicle includes upper hooks 11 and a lower transverse shaft 12 for mounting the attachment in corresponding holding devices on the carrier vehicle.
  • the frame consists of upper and lower transverse frame elements 13 and 14 and vertical lateral frame elements 15, 16, which together form a central opening 17.
  • upper and lower fastening cars 18, 19 are welded.
  • the ears hold the inside end of an operating arm 20 having a pin 21 therein.
  • guide tubes 22 On the external walls of frame 10 guide tubes 22 are mounted to carry extensible supporting struts 23.
  • Bydraulic cylinders 24 are fastened at their bottom end within the tubular supporting struts 23 and are hinged on their top end to angle plates 25.
  • the angle plates are in turn welded to the top transverse frame element 13 and directed toward the exterior.
  • the ends of the supporting struts 23, which in the retracted position protrude from the top guide tubes 22 are provided, over a suitable length, with slots or (as shown in FIG. 3) with a recess 26 extending over a portion of their surface.
  • Through the slots angle plates 25 extend into the tubular supporting struts.
  • Guide tubes and supporting struts are preferably (as shown in FIG. 3) inclined in such a manner that supporting recesses 26 in the extended state project from the plane of the frame in the direction toward the operating tool.
  • Operating arm 20 consists of a welded box structure, e.g., with a cross section shown in plan view in FIG. 2. Operating arm 20 protrudes non-symmetrically to one side approximately to the same extent as fastening ears welded to the other side protrude.
  • a hydraulic cylinder 29 is hinged to a pair of fastening ears 28 provided at the outer end of the operating arm. The piston rod end of this cylinder engages a fastening ear 30 which extends from lateral frame element 16.
  • FIG. 2 shows in broken lines the pivoting area, e.g., of between points A and B, in which area it is moved by hydraulic cylinder 29, retracted in position B and extended in position A.
  • the walls 15a, 16a of lateral frame elements or box carriers which form opening 17 are slanted in such a way as to correspond to the terminal pivoting position of the operating arm.
  • a pair of fastening ears 31 are provided for holding a hydraulic cylinder 32 whose piston rod end engages a pair of projections 33 of pivoting column 35 which rotates about a vertical shaft 34.
  • the arrangement is such that the cylinder 32 imparts sufficient torque to the pivoting column and to arm 36 fastened thereto, within a pivoting area X of at least Pivoting column 35, which is rotatable about shaft 34 on operating arm 20 and consisting of a welded structure, is provided at its top with a horizontal bearing sleeve 37 to receive a transverse shaft which supports shovel arm 36.
  • This transverse shaft carrier is provided with a lever 38, the bottom end of which is held, by means of a pin in a horizontal bearing sleeve 39 on the bottom side of pivoting column 35.
  • Lever 38 consists preferably of two identically shaped, connected, laterally spaced elements between which arm cylinder 41 is supported at point 40.
  • An operators seat 51 and a panel 52 with control arm are provided on the top side of operating lever 20 by means of a support 50 extending over frame 10.
  • the arrangement may be such that the operators seat 51 and control panel 52 in the pivoted state of the operating arm leave enough space to make possible the re-- traction of arm 36 near a lateral end of the frame and over this frame until it is on top of the carrier vehicle.
  • lever 38 When the arm is retracted over the frame and rests on a support block 44 provided there for transportation, lever 38 can be folded upward by means of cylinder 41 so that traffic obstacles are eliminated.
  • a backhoe apparatus including a frame, a backhoe boom, a shovel means associated with said boom, a column means at one end of said boom, and an operating arm pivotally connected with said frame for movement about a vertical pivot axis, said operating arm also being swingably connected with said column, whereby said arm is swingable relative to said frame and said column is swingable relative to said arm, the improvement comprising: a first means for laterally swinging said operating arm continuously and under load conditions through an arc of at least 45 to each side of a central position, said first means including a first hydraulic cylinder, one end of which is connected to said frame the other end of which is connected to said arm; and second means for laterally swinging said column independently of the lateral swinging of said operating arm, said second means including a second hydraulic cylinder one end of which is connected to said arm the other end of which is connected to said column, said second means effecting lateral swinging of said boom through an arc of at least 45 to each side of the longitudinal axis of the operating arm, where
  • said frame includes upper and lower horizontal frame members and at least a pair of vertical frame members, all of said frame members being joined so as to form an opening wherein said operating arm is mounted for movement about said vertical pivot axis, said frame having a first side facing in the same direction in which said operating arm extends from said frame and a second side facing in the opposite direction, said vertical pivot axis being located on said second side of said frame.
  • a backhoe apparatus comprising:
  • a first drive means in the form of a single, first, linearly extensible device connected with said operating arm and being the only drive means for swinging said operating arm with respect to said frame, one end of said first linearly extensible device being connected to said frame the other end being connected to said operating arm;
  • a second drive means in the form of a single, second, linearly extensible device connected with said column and being the only drive means for swinging said column with respect to said operating arm, one end of said second linearly extensible device being connected to said operating arm and the other end being connected to said column;
  • first and second drive means are capable of producing lateral movement of said boom through an effective arc of at least 5.
  • first linearly extensible device is a first hydraulic cylinder having a first extensible piston rod and said second linearly extensible device is a second hydraulic cylinder having a second extensible piston rod.
  • said operating arm includes an ear extending laterally outwardly therefrom, one end of said first linearly extensible device being attached to said frame, the other end being attached to said ear;
  • said column includes a protrusion extending laterally outwardly therefrom, one end of said second linearly extensible device being attached to said operating arm, the other end being attached to said protrusion.
  • An apparatus as defined in claim 4 including a shovel means attached to said boom.

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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)
  • Operation Control Of Excavators (AREA)
US00337558A 1970-03-18 1973-03-02 Backhoe apparatus Expired - Lifetime US3848756A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
FR7109122A FR2084685A5 (enrdf_load_stackoverflow) 1970-03-18 1971-03-16
US00337558A US3848756A (en) 1970-03-18 1973-03-02 Backhoe apparatus

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19702012731 DE2012731C3 (de) 1970-03-18 1970-03-18 Tieflöffel-Anbaubagger
US12561871A 1971-03-18 1971-03-18
US00337558A US3848756A (en) 1970-03-18 1973-03-02 Backhoe apparatus

Publications (1)

Publication Number Publication Date
US3848756A true US3848756A (en) 1974-11-19

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US00337558A Expired - Lifetime US3848756A (en) 1970-03-18 1973-03-02 Backhoe apparatus

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US (1) US3848756A (enrdf_load_stackoverflow)
FR (1) FR2084685A5 (enrdf_load_stackoverflow)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3987914A (en) * 1975-11-04 1976-10-26 Deere & Company Two-piece backhoe boom
EP0176829A1 (de) * 1984-10-01 1986-04-09 MACMOTER S.p.A. Kompaktbagger
US5087168A (en) * 1990-09-06 1992-02-11 Versa-Hoe Sales & Leasing Inc. Tilting device for backhoe

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3234020A1 (de) * 1982-09-14 1984-03-15 O & K Orenstein & Koppel Ag, 1000 Berlin Anordnung zum verschwenken eines anbauhalters der ausruestung eines hydraulikbaggers

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2880894A (en) * 1957-10-07 1959-04-07 Walker Matthew Paton Soil excavating apparatus
US3099358A (en) * 1960-08-01 1963-07-30 Int Harvester Co Means for shifting the axis of boom means or the like
US3167194A (en) * 1962-12-24 1965-01-26 Davis Self-propelled excavating machine

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2880894A (en) * 1957-10-07 1959-04-07 Walker Matthew Paton Soil excavating apparatus
US3099358A (en) * 1960-08-01 1963-07-30 Int Harvester Co Means for shifting the axis of boom means or the like
US3167194A (en) * 1962-12-24 1965-01-26 Davis Self-propelled excavating machine

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3987914A (en) * 1975-11-04 1976-10-26 Deere & Company Two-piece backhoe boom
EP0176829A1 (de) * 1984-10-01 1986-04-09 MACMOTER S.p.A. Kompaktbagger
US4693662A (en) * 1984-10-01 1987-09-15 Macmoter S.P.A Compact excavator
US5087168A (en) * 1990-09-06 1992-02-11 Versa-Hoe Sales & Leasing Inc. Tilting device for backhoe

Also Published As

Publication number Publication date
FR2084685A5 (enrdf_load_stackoverflow) 1971-12-17

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