US3412885A - Vehicle loader linkage - Google Patents

Vehicle loader linkage Download PDF

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Publication number
US3412885A
US3412885A US591785A US59178566A US3412885A US 3412885 A US3412885 A US 3412885A US 591785 A US591785 A US 591785A US 59178566 A US59178566 A US 59178566A US 3412885 A US3412885 A US 3412885A
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US
United States
Prior art keywords
bucket
lift
vehicle
ram
pivot
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Expired - Lifetime
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US591785A
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English (en)
Inventor
Pensa Pietro
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 Services NV
Original Assignee
Massey Ferguson Services NV
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Publication date
Application filed by Massey Ferguson Services NV filed Critical Massey Ferguson Services NV
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Publication of US3412885A publication Critical patent/US3412885A/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
    • E02F3/34—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
    • E02F3/3411—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 Z-type

Definitions

  • ABSTRACT OF THE DISCLOSURE A vehicle loader having a hollow lift arm pivotally attached to the vehicle by paired side walls, the lift arms having a pivoted bucket at the outer end, a lever pivoted on the arm having a pivoted link connected to the bucket and a pivoted hydraulic cylinder inside the hollow lift arm connected to the vehicle, a hydraulic cylinder pivoted to the side walls and enclosed within the same and connected to operate the lift arm.
  • This invention relates to vehicle loaders and more particularly to linkages used in such loaders.
  • Vehicle loaders generally include one or a pair of lift arms pivotable at one end on a vehicle or tractor framework and pivotably supporting a bucket at the other end.
  • the lift arm or arms can be raised by means of a hydraulic ram or rams acting between the tractor and the lift arms.
  • the bucket can be pivoted forwardly or rearwardly by one or more bucket rams acting through a parallelogram linkage, but remains in a substantially constant attitude relative to the ground when the lift rams only are actuated.
  • parallelogram linkages have been used with one such form utilizing a cross-over lever pivoted intermediate its ends on each lift arm, links connecting the lower end of each lever to the bucket and bucket rams connecting the upper ends to the frame and giving certain advantages over other types of linkage.
  • a self propelled Patented Nov. 26, 1968 ice power shovel or vehicle loader comprises a tractor, a pair of lift arms pivoted about a transverse axis on a portion of the tractor, lift rams for pivoting said lift arms, a bucket pivotally mounted on the lift arms, means for tilting said bucket relative to said lift arms including an intermediate lever carried by said lift arms, a link connecting said lever with the bucket, an extensible link connecting said lever with a fixed pivot point on the tractor vehicle, each said lift arm including a pair of members both of which carry the lift arm pivot and a lift ram pivot and defining between them a through aperture for the placement of said extensible link in the same plane as said lift arms.
  • the link connecting said intermediate lever to the bucket is pivotally connected to the top of the intermediate lever while the bottom of said lever is connected to said extensible link, the latter being constituted by a bucket ram having its cylinder pivotally connected to the vehicle.
  • the portion of the vehicle carrying each lift arm pivot comprises a hollow box structure having paired side walls extending without break or interruption from the lift arm pivot to a pivot connecting the lift ram to the vehicle and the pivot connecting the bucket ram cylinder to the vehicle is also carried on said side walls.
  • FIGURE 1 represents a side view of the self propelled shovel.
  • FIGURE 2 represents a front schematic view of the same shovel with the bucket raised.
  • FIGURES 3 and 4 are side views of the bucket linkage and lift arms in the carrying and dumping positions of the bucket.
  • a crawler tractor 1 carries a pair of lift arms and bucket linkages one on each side, only one of which will now be described, it being understood that the reference numerals used apply to the corresponding elements on the opposite side.
  • Inboard side plate 2 and outboard side plate 3 are joined at the top and the bottom to form a load carrying structure solid with the tractor.
  • a lift arm 4, pivoted at pivot 5 on the two side plates 2 and 3, is also provided with the side members 6 secured thereto, and at its forward end pivotally supports a bucket 8.
  • a pivot 9 joining the cylinder of a lift ram 10 to the tractor 1.
  • the piston rod of lift ram 10 is pivoted at its free end to the lowermost end of side members 6 the arrangement being that extension of the lift ram causes the lift arms to rise and vice versa.
  • Pivot 12 is the point of connection of the bucket ram 13 to the side plates 2 and 3, the piston rod being pinconnected at pivot 14 to twin levers 15 placed one on each side of the lift arm 4. Intermediate their ends the twin levers 15 are pivoted intermediate the ends of the lift arm 4 and at their upper ends pivot 18 connects them with bucket tilt link 17, itself pinned to the bucket structure at 19.
  • extension of jack 13 causes clockwise tilt (as seen in FIGURE 1) of the bucket such a motion being known as roll back.
  • hydraulic pressure acts on the full area of the ram piston to cause roll back, and on the opposite side of the ram piston to cause anticlockwise tilt or dump.
  • the pivots 12, 5, 16, 14 and pivots 16, 18, 19 and 7 ideally should constitute the corners of two rough parallelograms connected by having two common sides, namely lift arm 4 and levers 15.
  • Such a parallelogram linkage would keep the bucket at the same attitude with respect to the ground irrespective of its height.
  • the pivot 12 may be placed nearer or farther away from pivot 5 according to the attitude change required.
  • Stops 20 are provided on the lift arms to limit the forward tilt of the twin levers 15 and bucket S.
  • the two side plates 2 and 3 which extend smoothly and without a break or interruption from pivot 5 to pivot 9, carry tension loads between these two points and provide a simple and strong force path which is free of any joints, or other stress risers.
  • a vehicle loader having a box like structure carried on each side of the vehicle, a pair of parallel lift arms each having a hollow portion pivotally connected to and within one of said box like structures, a bucket carried on the ends of said lift arms, a pair of lift rams each pivoted within one of said box like structures and to one of said lift arms, a pair of intermediate levers each carried intermediate its end on one of said lift arms, links connecting one end of each intermediate lever to said bucket, a pair of hydraulic rams each pivotally connected at one end to one of said intermediate members and at the other end to one of said box like structure, said last mentioned hydraulic rams extending through the hollow portions of said lift arms in the same general planes as the lift arms.
  • a vehicle loader having a hollow box like structure having paired side walls, a lift arm assembly pivoted on the side walls, a lift arm connected to the side walls and lift arm assembly for raising and lowering said lift arm, a bucket pivotally mounted on said lift arm, an intermediate lever pivoted intermediate its ends on said lift arm intermediate the ends thereof, a link connected to one end of said intermediate lever and said bucket, an extensible link connecting the other end of said intermediate lever and said vehicle, said lift arm assembly including a hollow portion through which said extensible link extends, whereby said extensible link lies in the same plane as said lift arm.
  • said extensible link comprises a hydraulic ram connected between the lower end of said intermediate lever and a pivot point on said paired side walls.

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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)
US591785A 1965-11-11 1966-11-03 Vehicle loader linkage Expired - Lifetime US3412885A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT2497965 1965-11-11

Publications (1)

Publication Number Publication Date
US3412885A true US3412885A (en) 1968-11-26

Family

ID=11215310

Family Applications (1)

Application Number Title Priority Date Filing Date
US591785A Expired - Lifetime US3412885A (en) 1965-11-11 1966-11-03 Vehicle loader linkage

Country Status (5)

Country Link
US (1) US3412885A (enrdf_load_html_response)
ES (1) ES333175A1 (enrdf_load_html_response)
FR (1) FR1504826A (enrdf_load_html_response)
GB (1) GB1108340A (enrdf_load_html_response)
SE (1) SE316117B (enrdf_load_html_response)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3648871A (en) * 1970-02-19 1972-03-14 Layton Mfg Co Vehicle loader
US3675803A (en) * 1970-04-06 1972-07-11 Cascade Corp Load-handling apparatus with reach mechanism
US4364705A (en) * 1980-07-07 1982-12-21 J. I. Case Company Loader mechanism

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4006834A (en) * 1976-01-15 1977-02-08 Caterpillar Tractor Co. Tilt linkage for loader buckets

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2482612A (en) * 1947-02-19 1949-09-20 Edward A Drott Shovel loader
US2645369A (en) * 1950-03-15 1953-07-14 Frederick W Allan Power loader
US2711257A (en) * 1952-03-14 1955-06-21 Jaeger Machine Co Portable shovel loader
US3076571A (en) * 1960-04-22 1963-02-05 Shovel Company Front end loader

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2482612A (en) * 1947-02-19 1949-09-20 Edward A Drott Shovel loader
US2645369A (en) * 1950-03-15 1953-07-14 Frederick W Allan Power loader
US2711257A (en) * 1952-03-14 1955-06-21 Jaeger Machine Co Portable shovel loader
US3076571A (en) * 1960-04-22 1963-02-05 Shovel Company Front end loader

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3648871A (en) * 1970-02-19 1972-03-14 Layton Mfg Co Vehicle loader
US3675803A (en) * 1970-04-06 1972-07-11 Cascade Corp Load-handling apparatus with reach mechanism
US4364705A (en) * 1980-07-07 1982-12-21 J. I. Case Company Loader mechanism

Also Published As

Publication number Publication date
DE1456775A1 (de) 1969-06-12
GB1108340A (en) 1968-04-03
ES333175A1 (es) 1967-07-16
FR1504826A (fr) 1967-12-08
SE316117B (enrdf_load_html_response) 1969-10-13

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