US3452882A - Swing mechanism for backhoes - Google Patents

Swing mechanism for backhoes Download PDF

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Publication number
US3452882A
US3452882A US713886A US3452882DA US3452882A US 3452882 A US3452882 A US 3452882A US 713886 A US713886 A US 713886A US 3452882D A US3452882D A US 3452882DA US 3452882 A US3452882 A US 3452882A
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US
United States
Prior art keywords
support
mast frame
axis
pin
lever
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
US713886A
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English (en)
Inventor
Fred W Noller
George W Bingley
Jerald T Smith
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.)
Massey Ferguson Inc
Original Assignee
Massey Ferguson Inc
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
Application filed by Massey Ferguson Inc filed Critical Massey Ferguson Inc
Application granted granted Critical
Publication of US3452882A publication Critical patent/US3452882A/en
Assigned to SIEVERS, GEORGE R., AS INDIVIDUAL TRUSTEE, J. HENRY SCHRODER BANK & TRUST COMPANY, A NEW YORK BANKING INSTITUTION AS TRUSTEE reassignment SIEVERS, GEORGE R., AS INDIVIDUAL TRUSTEE SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: MASSEY-FERGUSON, INC.
Assigned to SIEVERS, GEORGE R. (INDIVIDUAL TRUSTEE), J. HENRY SCHRODER BANK & TRUST COMPANY, A NY BANKING INSTITUTION (TRUSTEE) reassignment SIEVERS, GEORGE R. (INDIVIDUAL TRUSTEE) SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: MASSEY-FERGUSON INC., A MD. CORP.
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

  • a backhoe swing mechanism including a mast frame pivotally mounted on a support for side to side swinging movement.
  • the mast frame is actuated about its pivotal connection with the support by a pair of hydraulic rams, each of which is connected through a lever with the mast frame.
  • Each lever in turn is fulcrumed on one end of a link, the other end of the link being pivotally connected with the support.
  • the rams As one of the rams extends, its lever pushes the mast frame about its pivotal axis, and the other ram retracts to cause its lever to pull the mast frame about the pivotal axis.
  • This invention relates generally to mechanism for turning booms, cranes, and the like of material handling equipment, and is particularly concerned with a swing mechanism for material handling apparatus of the type commonly referred to as backhoes.
  • a backhoe boom or mast is actuated about its pivotal connection with the backhoe support by a pair of rams connected with the boom frame by a lever.
  • the lever is fulcrumed on one end of a link, the other end of the link being pivoted to the backhoe support to that the lever is on a moving fulcrum and is pivotally connected with the boom support at a point spaced from its pivotal axis.
  • the rams As one of the rams extends, its lever pushes the mast frame to rotate about its pivotal axis and the other ram simultaneously retracts to cause its lever to pull the boom frame about its pivotal axis.
  • the mast frame can be rotated through an arc of 180 degrees with substantially uniform torque.
  • FIG. 1 is an elevational view of a tractor mounted backhoe embodying the invention
  • FIG. 2 is a view taken on line 2-2 of FIG. 1;
  • FIG. 3 is a sectional view taken on line 33 of FIG. 2;
  • FIG. 4 is a view similar to FIG. 2 with the mast frame in an alternate position
  • FIG. 5 is a perspective view of the force transmitting linkage for actuating the mast frame about its pivotal axis.
  • reference numeral 2 collectively designates a backhoe support mounted on a tractor 4 having rear wheels 6, a seat 8, and a control console having handles for manipulating the hydraulic controls of the backhoe assembly.
  • a backhoe boom assembly 12 mounted on the support is a backhoe boom assembly 12.
  • the backhoe support has a rear wall 14 (FIGS. 2 and 4) having side portions 16 each of which is formed with an opening 18. Projecting rearwardly from the rear wall 3,452,882 Patented July 1, 1969 14 is a horizontal upper support arm 20 and a lower support arm 22 (FIG. 1). Extending vertically between the spaced support arms 20 and 22 is a tubular post 24.
  • mast frame 26 Pivotally mounted on arms 20 and 22 is a mast frame 26 having a lower mast frame arm 28 and an upper mast frame arm 30 which are respectively pivotally connected with support arms 22 and 20 about a swing axis 32.
  • the lower support arm 22 is pivotally connected with mast frame 26 about axis 32 by a pin 34 (FIG. 2).
  • Mast frame 26 is formed with a pair of horizontally spaced rearwardly projecting ears or lugs 36 on which the boom or mast 40 of boom assembly 12 is pivotally connected by a pin 38 in a conventional manner.
  • the central portion 42 of mast frame 26 overlies the lower support arm 22 as shown in FIG. 1, and extends beneath the upper support arm 20.
  • Mast frame 26 is actuated about pivot axis 32 by a pair of hydraulic rams 44 and 46.
  • Ram 44 includes a cylinder 48 pivotally supported at one end on the boom support at a location not shown, and a piston 50 which projects through opening 18.
  • Ram 46 includes a cylinder 52 pivotally supported on the backhoe support at a location not shown and a piston 54 which projects through opening 18.
  • Piston 50 of ram 44 is pivotally connected by a pin 58 to one end of a lever 56, the other end of which is pivotally connected by a pin 60 to a bracket 62 carried on the lower side of mast frame 26 (FIG. 1).
  • Pin 60 is spaced from the pivot axis 32 as indicated more clearly in FIGS. 2 and 4. Pin 60 is received between the upper and lower arms 64 and 66, respectively, of bracket 62 (FIGS. 1 and 3).
  • Piston 54 is pivotally connected by a pin 70 with one end of a lever 68, the other end of which is also pivotally supported on pin 60.
  • a bracket 72 Projecting from the central portion of rear wall 14 beneath the lower support arm22 is a bracket 72 having a plurality (in this case 4) of rearwardly projecting, vertically spaced arms 74.
  • a pair of links 76 are pivotally connected at one end by a pin to bracket arms 74, and have their other ends pivotally connected by a pin 78 to lever 56 substantially at its midpoint between pins 58 and 60.
  • a similar pair of links 82 are supported at one end between arms 74 on pin 80 and at their other ends by pin 84 to lever 68 intermediate its ends. Consequently, pivot pin 78 provides a moving fulcrum for lever 56, and pivot pin 84 provides a moving fulcrum for lever 68.
  • the mast frame 26 is shown in its center or straight ahead position relative to the backhoe support in which pistons 50 and 54 are extended an equal amount from their respective cylinders 48 and 52.
  • pistons 50 and 54 are extended an equal amount from their respective cylinders 48 and 52.
  • ram 44 is extended and ram 46 is correspondingly retracted.
  • link 76 rotates in a clockwise direction about the axis of pivot pin 80, and during the movement of link 76, lever 56 rotates in a clockwise direction about the moving fulcrum pin 78 which in turn causes mast frame 26 to pivot in a clockwise direction about pivot axis 32.
  • lever 56 is transmitted to mast frame 26 through pin 60 which may rotate about the axis 32 through an arc of degrees from the position shown in FIG. 2 to that shown in FIG. 4.
  • the ram 46 contracts a corresponding amount to pull pin 60 in a clockwise direction about the pivot axis 32 which movement correspondingly causes link 82 to rotate in a clockwise direction about pin 80.
  • Lever 68 rotates about the moving fulcrum pin 84 as ram 46 is retracted from the position shown in FIG. 2 to that shown in FIG. 4.
  • the lengths of levers '56 and 68 are approximately four times the distance between the axes of pins 34 and 60, and are approximately twice 3 the length of links 76 and 82.
  • the distance between pins 80 and 34 are preferably in the range of one to two times the distance between pins 34 and 60.
  • Material handling apparatus comprising: a support; a mast frame mounted on the support for side to side swinging movement about an upright swing axis; a pair of links each having one end pivotally connected to the support; a pair of levers, pivotally mounted intermediate their ends on respective ones of said links; a pair of extensible and retractible power elements mounted on the support; and means pivotally connecting one end of each of said levers with the mast frame, and the other end with respective ones of the power elements on opposite sides of the swing axis so that opposed extension and retraction of the power elements with respect to each other causes the mast frame to rotate about the swing axis with respect to the support.
  • said support includes a pair of vertically spaced upper and lower support arms and said mast frame having a pair of upper and lower mast frame arms respectively pivotally connected with said upper and lower support arms on said swing axis.
  • Material handling apparatus as claimed in claim 6 further including a bracket formed on the mast frame beneath the lower mast frame arm, said one end of said levers being pivotally connected with said last named bracket.

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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)
  • Conveying And Assembling Of Building Elements In Situ (AREA)
  • Jib Cranes (AREA)
US713886A 1968-03-18 1968-03-18 Swing mechanism for backhoes Expired - Lifetime US3452882A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US71388668A 1968-03-18 1968-03-18

Publications (1)

Publication Number Publication Date
US3452882A true US3452882A (en) 1969-07-01

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ID=24867930

Family Applications (1)

Application Number Title Priority Date Filing Date
US713886A Expired - Lifetime US3452882A (en) 1968-03-18 1968-03-18 Swing mechanism for backhoes

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US (1) US3452882A (da)
FR (1) FR2004098A1 (da)
GB (1) GB1229557A (da)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3630120A (en) * 1970-05-04 1971-12-28 Int Harvester Co Swinging apparatus
US3657831A (en) * 1970-05-11 1972-04-25 American Tractor Equip Corp Offsetting cable plow
US3815766A (en) * 1970-05-04 1974-06-11 Int Harvester Co Backhoe swing mechanism
FR2570401A1 (fr) * 1984-09-18 1986-03-21 Mat Indl Ste Savoya Const Pelle hydraulique du type tracte, equipee d'un ensemble de motorisation temporaire autonome
US4601626A (en) * 1982-09-14 1986-07-22 O&K Orenstein Arrangement for swinging an attachment holder for the equipment of a hydraulic excavator
EP0440895A1 (de) * 1990-02-05 1991-08-14 Dr.Ing.h.c. F. Porsche Aktiengesellschaft Bagger, insbesondere Löffelbagger

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2015469B (en) * 1978-03-01 1982-03-24 Mcconnel F W Ltd Mounting of appliances on vehicles

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3057494A (en) * 1959-01-30 1962-10-09 Wain Roy Corp Excavating apparatus
US3097750A (en) * 1960-07-08 1963-07-16 Stummer Wilfried Device for translating axial motion into swinging motion
US3395812A (en) * 1966-03-21 1968-08-06 Wain Roy Corp Boom swing system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3057494A (en) * 1959-01-30 1962-10-09 Wain Roy Corp Excavating apparatus
US3097750A (en) * 1960-07-08 1963-07-16 Stummer Wilfried Device for translating axial motion into swinging motion
US3395812A (en) * 1966-03-21 1968-08-06 Wain Roy Corp Boom swing system

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3630120A (en) * 1970-05-04 1971-12-28 Int Harvester Co Swinging apparatus
US3815766A (en) * 1970-05-04 1974-06-11 Int Harvester Co Backhoe swing mechanism
US3657831A (en) * 1970-05-11 1972-04-25 American Tractor Equip Corp Offsetting cable plow
US4601626A (en) * 1982-09-14 1986-07-22 O&K Orenstein Arrangement for swinging an attachment holder for the equipment of a hydraulic excavator
FR2570401A1 (fr) * 1984-09-18 1986-03-21 Mat Indl Ste Savoya Const Pelle hydraulique du type tracte, equipee d'un ensemble de motorisation temporaire autonome
EP0440895A1 (de) * 1990-02-05 1991-08-14 Dr.Ing.h.c. F. Porsche Aktiengesellschaft Bagger, insbesondere Löffelbagger

Also Published As

Publication number Publication date
FR2004098A1 (da) 1969-11-21
GB1229557A (da) 1971-04-28

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Legal Events

Date Code Title Description
AS Assignment

Owner name: J. HENRY SCHRODER BANK & TRUST COMPANY, A NEW YOR

Free format text: SECURITY INTEREST;ASSIGNOR:MASSEY-FERGUSON, INC.;REEL/FRAME:004164/0687

Effective date: 19830217

Owner name: SIEVERS, GEORGE R., AS INDIVIDUAL TRUSTEE

Free format text: SECURITY INTEREST;ASSIGNOR:MASSEY-FERGUSON, INC.;REEL/FRAME:004164/0687

Effective date: 19830217

AS Assignment

Owner name: J. HENRY SCHRODER BANK & TRUST COMPANY, A NY BANKI

Free format text: SECURITY INTEREST;ASSIGNOR:MASSEY-FERGUSON INC., A MD. CORP.;REEL/FRAME:004583/0684

Effective date: 19860509

Owner name: SIEVERS, GEORGE R. (INDIVIDUAL TRUSTEE)

Free format text: SECURITY INTEREST;ASSIGNOR:MASSEY-FERGUSON INC., A MD. CORP.;REEL/FRAME:004583/0684

Effective date: 19860509