EP0382272A1 - Loader mounting frame - Google Patents

Loader mounting frame Download PDF

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Publication number
EP0382272A1
EP0382272A1 EP90200132A EP90200132A EP0382272A1 EP 0382272 A1 EP0382272 A1 EP 0382272A1 EP 90200132 A EP90200132 A EP 90200132A EP 90200132 A EP90200132 A EP 90200132A EP 0382272 A1 EP0382272 A1 EP 0382272A1
Authority
EP
European Patent Office
Prior art keywords
main support
tractor
mounting frame
support arm
support arms
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.)
Withdrawn
Application number
EP90200132A
Other languages
German (de)
French (fr)
Inventor
Russell I. Johnson
Daniel D. Radke
Garry L. Ball
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.)
New Holland North America Inc
Original Assignee
Ford New Holland 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 Ford New Holland Inc filed Critical Ford New Holland Inc
Publication of EP0382272A1 publication Critical patent/EP0382272A1/en
Withdrawn legal-status Critical Current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
    • 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
    • E02F3/34—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 bucket-arms, i.e. a pair of arms, e.g. manufacturing processes, form, geometry, material of bucket-arms directly pivoted on the frames of tractors or self-propelled machines
    • E02F3/3405—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 bucket-arms, i.e. a pair of arms, e.g. manufacturing processes, form, geometry, material of bucket-arms directly pivoted on the frames of tractors or self-propelled machines and comprising an additional linkage mechanism
    • E02F3/3408—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 bucket-arms, i.e. a pair of arms, e.g. manufacturing processes, form, geometry, material of bucket-arms directly pivoted on the frames of tractors or self-propelled machines and comprising an additional linkage mechanism of the parallelogram-type
    • 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
    • E02F3/627—Devices to connect beams or arms to tractors or similar self-propelled machines, e.g. drives therefor

Definitions

  • the present invention relates generally to tractor loader backhoes having a loading mechanism operatively positioned forwardly of the tractor and, more particularly, to a mounting frame operably attaching the bucket loader to the tractor.
  • the mounting frames for the front end loader on a tractor loader backhoe have main support arms formed in a dog-leg shape such as shown in US-A-4.531.883.
  • the thickest cross-sectional configuration of a main support arm is positioned intermediate the ends and at the bend thereof.
  • the connections of the hydraulic cylinders to actuate movement of the support arms relative to the tractor and of the bucket relative to the support arms are usually provided at these intermediate bent portions of the main support arms.
  • a mounting frame to pivotally attach a working tool, such as a loader bucket, forwardly of a tractor and which utilizes main support arms which have a more efficient structural configuration so that these main support arms can be manufactured more easily and will have less weight without sacrificing strength or structural integrity.
  • a mounting frame which is adapted to be pivotally connected to a tractor and to detachably support a working tool in an operative position forwardly of said tractor; said mounting frame comprising : - a pair of laterally spaced apart, longitudinally extending main support arms which are positionable on opposing sides of the tractor; each one of said arms having a rearward end pivotally connectable to a respective side of the tractor and a distal forward end adapted for pivotal connection to the working tool for operable support thereof; and - a torque member extending transversely between said main support arms at a location which, when the mounting frame is connected to the tractor, is positioned forwardly of said tractor.
  • each main support arm includes an intermediate portion located between said forward and rearward ends and which has the largest cross-sectional configuration of said main support arm and is positioned immediately rearwardly of the torque member. Furthermore, the cross-sectional configuration of this main support arm decreases in size from this intermediate portion toward both the rearward and forward ends thereof.
  • Each main support arm is generally symmetrical about a straight line interconnecting the forward and rearward pivots.
  • a pivot linkage is associated with each main support arm and interconnects this main support arm and the loader bucket.
  • a hydraulic cylinder extending between each pivot linkage and the corresponding main support arm is disposed to control the pivotal movement of the loader bucket relative to the support arms.
  • Each pivot linkage is connected to the corresponding main support arm between the aforementioned intermediate portion thereof and the forward pivotal connection of this arm with the loader bucket.
  • this mounting frame in general and of the main supporting arms thereof in particular is simplified with less material being required therefore without sacrificing strength or structural integrety.
  • the mounting frame 10 includes a pair of laterally spaced main support arms 12 positioned on opposing sides of the tractor T and interconnected by a transversely extending torque tube 20 positioned forwardly of the tractor T to resist torsional forces exerted by the operation of a loader bucket 25.
  • a loader bucket 25 is depicted in the drawings, other working tools, such as a forklift, could be equally utilized.
  • Each main support arm 12 includes a rearward portion 13 carrying a pivot 14 connected to the tractor T to provide a center of pivotal movement of the mounting frame 10.
  • Each main support arm 12 also includes a forward end 15 carrying a second pivot 16 for connection to the loader bucket 25 to pivotally support this loader bucket 25 for operative movement relative to the main support arms 12.
  • Each main support arm 12 also includes an intermediate portion 18 located immediately rearwardly of the torque tube 20 at which the greatest cross-sectional configuration of this main support arm 12 can be found.
  • the configuration of each main support arm 12 is generally symmetrical about a line extending between the rearward and forward pivots 14, 16 with the size of the cross-sectional configuration decreasing from the intermediate portion 18 immediately rearwardly of the torque tube 20 toward both the rearward end 13 and the forward end 15.
  • Each main support arm 12 is also provided with a mounting bracket 21 to which is connected a hydraulic cylinder 22 extending from a pivotal connection with the tractor T such that the extension of the hydraulic cylinder 22 will effect a pivotal movement of the mounting frame 10 about the rearward pivot 14 on the main support arms 12.
  • a mechanical lockout 24 is carried by the left main support arm 12 to be selectively engagable with the corresponding hydraulic cylinder 22 after it has been extended to position the mounting frame 10 in the position such as indicated in phantom in Fig. 1 to mechanically lock the retraction of this hydraulic cylinder 22 in a manner conventional in the art.
  • the mounting frame 10 also includes pivot linkages 30 respectively interconnecting the main support arms 12 and the loader bucket 25 to control the pivotal movement of the loader bucket 25 about its pivotal connection 16 to the main support arms 12.
  • Each pivot linkage 30 includes a first link 32 pivotally connected to a bracket 33 affixed to the corresponding main support arm 12 beneath the transverse line of the torque tube 20 between the intermediate portion 18 and the forward end 15.
  • Each pivot linkage 30 also includes a second link 34 pivotally connected to the loader bucket 25 at a position above the pivot 16 and extending rearwardly therefrom to pivotally connect to the corresponding first link 32 by a pivot 39.
  • a second hydraulic cylinder 35 is attached to a bracket 37 affixed to each one of the main support arms 12 between the intermediate portion 18 and the rearward end 13 and connects to the corresponding pivot linkage 30 at the pivot 39.
  • the telescopic operation of the second hydraulic cylinders 35 controls the pivotal movement of the loader bucket 25 about the loader arm pivot 16.
  • a cross-bar 38 interconnects the pivots 39 corresponding to the left and right sides of the mounting frame 10 as best depicted in Fig. 2.
  • the stresses imposed in the main support arms 12 from the operation of the loader bucket 25 can be adequately accommodated without the addition of further material between these intermediate portions 18 and the rearward ends 13 as is typical in prior art tractor loader mechanisms. Accordingly, the size of the mounting frame 10 can be reduced without sacrificing strength or operational characteristics.

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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)
  • Shovels (AREA)
  • Agricultural Machines (AREA)

Abstract

A mounting frame (10) for use with a tractor loader is disclosed wherein the main support arms (12) extend generally linearly from the rear pivot mountings (14) thereof with the tractor (T) to the front pivot mountings (16) with the loader bucket (25). The thickest portion (18) of each main support arm (12) is positioned immediately rearwardly of the transverse torque tube (20) interconnecting the laterally spaced main support arms (12). Each main support arm (12) decreases in size from this intermediate portion (18) toward the forward and rearward pivots (16, 14). Each main support arm (12) is generally symmetrical about a straight line interconnecting the forward and rearward pivots (16, 14).

Description

  • The present invention relates generally to tractor loader backhoes having a loading mechanism operatively positioned forwardly of the tractor and, more particularly, to a mounting frame operably attaching the bucket loader to the tractor.
  • Typically, the mounting frames for the front end loader on a tractor loader backhoe have main support arms formed in a dog-leg shape such as shown in US-A-4.531.883. Typically, the thickest cross-sectional configuration of a main support arm is positioned intermediate the ends and at the bend thereof. Furthermore, the connections of the hydraulic cylinders to actuate movement of the support arms relative to the tractor and of the bucket relative to the support arms are usually provided at these intermediate bent portions of the main support arms.
  • It would be desirable to provide a mounting frame to pivotally attach a working tool, such as a loader bucket, forwardly of a tractor and which utilizes main support arms which have a more efficient structural configuration so that these main support arms can be manufactured more easily and will have less weight without sacrificing strength or structural integrity.
  • According to the present invention, a mounting frame is provided which is adapted to be pivotally connected to a tractor and to detachably support a working tool in an operative position forwardly of said tractor; said mounting frame comprising :
    - a pair of laterally spaced apart, longitudinally extending main support arms which are positionable on opposing sides of the tractor; each one of said arms having a rearward end pivotally connectable to a respective side of the tractor and a distal forward end adapted for pivotal connection to the working tool for operable support thereof; and
    - a torque member extending transversely between said main support arms at a location which, when the mounting frame is connected to the tractor, is positioned forwardly of said tractor.
  • Said mounting frame is characterized in that each main support arm includes an intermediate portion located between said forward and rearward ends and which has the largest cross-sectional configuration of said main support arm and is positioned immediately rearwardly of the torque member. Furthermore, the cross-sectional configuration of this main support arm decreases in size from this intermediate portion toward both the rearward and forward ends thereof.
  • Each main support arm is generally symmetrical about a straight line interconnecting the forward and rearward pivots. A pivot linkage is associated with each main support arm and interconnects this main support arm and the loader bucket. A hydraulic cylinder extending between each pivot linkage and the corresponding main support arm is disposed to control the pivotal movement of the loader bucket relative to the support arms. Each pivot linkage is connected to the corresponding main support arm between the aforementioned intermediate portion thereof and the forward pivotal connection of this arm with the loader bucket.
  • The manufacture of this mounting frame in general and of the main supporting arms thereof in particular is simplified with less material being required therefore without sacrificing strength or structural integrety.
  • The advantages of this invention will become apparent upon consideration of the following detailed disclosure of the invention, especially when taken in conjunction with the accompanying drawings wherein :
    • Fig. 1 is a side-elevational view of the mounting frame incorporating the principles of the instant invention; the representative tractor to which the mounting frame would be pivotally attached and a representative pivotal movement of the mounting frame and loader bucket being shown in phantom; and
    • Fig. 2 is a top plan view of the tractor loader mounting frame and the loader bucket shown in Fig. 1 with the representative tractor again being shown in phantom.
  • Referring now to these drawings, a left side-elevational view and a top plan view of the tractor loader mounting frame can be seen. Any left and right references are used as a matter of convenience and are determined by standing behind the steering wheel S of the tractor shown in phantom and looking forwardly toward the loader bucket 25.
  • The mounting frame 10 includes a pair of laterally spaced main support arms 12 positioned on opposing sides of the tractor T and interconnected by a transversely extending torque tube 20 positioned forwardly of the tractor T to resist torsional forces exerted by the operation of a loader bucket 25. Although a loader bucket 25 is depicted in the drawings, other working tools, such as a forklift, could be equally utilized. Each main support arm 12 includes a rearward portion 13 carrying a pivot 14 connected to the tractor T to provide a center of pivotal movement of the mounting frame 10. Each main support arm 12 also includes a forward end 15 carrying a second pivot 16 for connection to the loader bucket 25 to pivotally support this loader bucket 25 for operative movement relative to the main support arms 12.
  • Each main support arm 12 also includes an intermediate portion 18 located immediately rearwardly of the torque tube 20 at which the greatest cross-sectional configuration of this main support arm 12 can be found. The configuration of each main support arm 12 is generally symmetrical about a line extending between the rearward and forward pivots 14, 16 with the size of the cross-sectional configuration decreasing from the intermediate portion 18 immediately rearwardly of the torque tube 20 toward both the rearward end 13 and the forward end 15.
  • Each main support arm 12 is also provided with a mounting bracket 21 to which is connected a hydraulic cylinder 22 extending from a pivotal connection with the tractor T such that the extension of the hydraulic cylinder 22 will effect a pivotal movement of the mounting frame 10 about the rearward pivot 14 on the main support arms 12. A mechanical lockout 24 is carried by the left main support arm 12 to be selectively engagable with the corresponding hydraulic cylinder 22 after it has been extended to position the mounting frame 10 in the position such as indicated in phantom in Fig. 1 to mechanically lock the retraction of this hydraulic cylinder 22 in a manner conventional in the art.
  • The mounting frame 10 also includes pivot linkages 30 respectively interconnecting the main support arms 12 and the loader bucket 25 to control the pivotal movement of the loader bucket 25 about its pivotal connection 16 to the main support arms 12. Each pivot linkage 30 includes a first link 32 pivotally connected to a bracket 33 affixed to the corresponding main support arm 12 beneath the transverse line of the torque tube 20 between the intermediate portion 18 and the forward end 15. Each pivot linkage 30 also includes a second link 34 pivotally connected to the loader bucket 25 at a position above the pivot 16 and extending rearwardly therefrom to pivotally connect to the corresponding first link 32 by a pivot 39.
  • A second hydraulic cylinder 35 is attached to a bracket 37 affixed to each one of the main support arms 12 between the intermediate portion 18 and the rearward end 13 and connects to the corresponding pivot linkage 30 at the pivot 39. The telescopic operation of the second hydraulic cylinders 35 controls the pivotal movement of the loader bucket 25 about the loader arm pivot 16. To stabilize the operation of the pivot linkages 30 a cross-bar 38 interconnects the pivots 39 corresponding to the left and right sides of the mounting frame 10 as best depicted in Fig. 2.
  • Because of the positioning of the greatest cross-sectional configuration at the intermediate portions 18 immediately rearwardly of the torque tube 20, the stresses imposed in the main support arms 12 from the operation of the loader bucket 25 can be adequately accommodated without the addition of further material between these intermediate portions 18 and the rearward ends 13 as is typical in prior art tractor loader mechanisms. Accordingly, the size of the mounting frame 10 can be reduced without sacrificing strength or operational characteristics.
  • It will be understood that changes in the details, materials, steps, and arrangements of parts which have been described and illustrated to explain the nature of the invention will occur to and may be made by those skilled in the art upon a reading of this disclosure within the principles and scope of the invention. The foregoing description illustrates the preferred embodiment of the invention; however, concepts, as based upon the description, may be employed in other embodiments without departing from the scope of the invention. Accordingly, the following claims are intended to protect the invention broadly as well as in the specific form shown.

Claims (7)

1. A mounting frame (10) adapted to be pivotally connected to a tractor (T) and to detachably support a working tool (25) in an operative position forwardly of said tractor (T); said mounting frame (10) comprising :
- a pair of laterally spaced apart, longitudinally extending main support arms (12) which are positionable on opposing sides of the tractor (T); each one of said arms (12) having a rearward end pivotally connectable to a respective side of the tractor (T) and a distal forward end adapted for pivotal connection to the working tool (25) for operable support thereof; and
- a torque member (20) extending transversely between said main support arms (12) at a location which, when the mounting frame (10) is connected to the tractor (T), is positioned forwardly of said tractor (T), and characterized in that :
each main support arm (12) includes an intermediate portion (18) located between said forward and rearward ends; said intermediate portion (18) having the largest cross-sectional configuration of said main support arm (12) and being positioned immediately rearwardly of the torque member (20) and the cross-sectional configuration of this main support arm (12) decreasing in size from the intermediate portion (18) toward both the rearward and forward ends thereof.
2. A mounting frame (10) according to claim 1 characterized in that each said main support arm (12) is generally symmetrical about a straight line interconnecting said forward and rearward ends thereof.
3. A mounting frame (10) according to claim 1 or 2 characterized in that it further also comprises a pivot linkage (30) interconnecting each one of said main support arms (12) and the working tool (25) to control the pivotal movement of the working tool (25) about the pivotal connection thereof with the forward end of said main support arm (12).
4. A mounting frame (10) according to claim 3 characterized in that each said pivot linkage (30) includes a first link (32) pivotally connected to the corresponding main support arm (12) at a location forwardly of said intermediate portion (18) and a second link (34) pivotally connected to the working tool (25) and extending rearwardly for pivotal connection with the corresponding first link (32).
5. A mounting frame (10) according to claim 3 or 4 characterized in that each said pivot linkage (30) is connected to a hydraulic cylinder (35) which is mounted on the corresponding main support arm (12) to effect movement of said pivot linkage (30) and an associated pivtal movement of the working tool (25).
6. A mounting frame (10) according to any one of the preceding claims, characterized in that the pivotal movement of the main support arms (12) about the pivotal connection of the rearward ends thereof to the tractor (T) is controlled by a pair of hydraulic cylinders (22) respectively interconnecting said main support arms (12) and the tractor (T).
7. A mounting frame (10) according to claim 6 characterized in that at least one of said main support arms (12) carries a lockout device (24) which is engageable with the corresponding hydraulic cylinder (22) extending between said arm (12) and the tractor (T) to lock said corresponding hydraulic cylinder (22) in an extended position.
EP90200132A 1989-01-23 1990-01-18 Loader mounting frame Withdrawn EP0382272A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US30001989A 1989-01-23 1989-01-23
US300019 1989-01-23

Publications (1)

Publication Number Publication Date
EP0382272A1 true EP0382272A1 (en) 1990-08-16

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP90200132A Withdrawn EP0382272A1 (en) 1989-01-23 1990-01-18 Loader mounting frame

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EP (1) EP0382272A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2362148A (en) * 2000-05-10 2001-11-14 Bamford Excavators Ltd Machine having a working arm
WO2015101502A1 (en) * 2013-12-31 2015-07-09 Agco Sa Front loader frame

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2134266A1 (en) * 1971-04-29 1972-12-08 Faucheux Ets
US3722864A (en) * 1971-12-13 1973-03-27 Caterpillar Tractor Co Composite structural member
GB2102382A (en) * 1981-06-09 1983-02-02 Fiat Allis Europ Linkage system for a loader vehicle

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2134266A1 (en) * 1971-04-29 1972-12-08 Faucheux Ets
US3722864A (en) * 1971-12-13 1973-03-27 Caterpillar Tractor Co Composite structural member
GB2102382A (en) * 1981-06-09 1983-02-02 Fiat Allis Europ Linkage system for a loader vehicle

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2362148A (en) * 2000-05-10 2001-11-14 Bamford Excavators Ltd Machine having a working arm
US6699000B2 (en) 2000-05-10 2004-03-02 J. C. Bamford Excavators Limited Machine having a working arm
GB2362148B (en) * 2000-05-10 2004-03-24 Bamford Excavators Ltd A machine having a working arm
WO2015101502A1 (en) * 2013-12-31 2015-07-09 Agco Sa Front loader frame

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