EP0744500A2 - Chargeur avec mécanisme de commande du déplacement parallèle pour outil de travail - Google Patents

Chargeur avec mécanisme de commande du déplacement parallèle pour outil de travail Download PDF

Info

Publication number
EP0744500A2
EP0744500A2 EP96107712A EP96107712A EP0744500A2 EP 0744500 A2 EP0744500 A2 EP 0744500A2 EP 96107712 A EP96107712 A EP 96107712A EP 96107712 A EP96107712 A EP 96107712A EP 0744500 A2 EP0744500 A2 EP 0744500A2
Authority
EP
European Patent Office
Prior art keywords
tool
arm
servomotor
loader
loader according
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.)
Granted
Application number
EP96107712A
Other languages
German (de)
English (en)
Other versions
EP0744500B1 (fr
EP0744500A3 (fr
Inventor
Henry Friesen
Ken Kengi Oka
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.)
Deere and Co
Original Assignee
Deere and Co
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 Deere and Co filed Critical Deere and Co
Publication of EP0744500A2 publication Critical patent/EP0744500A2/fr
Publication of EP0744500A3 publication Critical patent/EP0744500A3/fr
Application granted granted Critical
Publication of EP0744500B1 publication Critical patent/EP0744500B1/fr
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
    • E02F3/34—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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S414/00—Material or article handling
    • Y10S414/13—Handlers utilizing parallel links

Definitions

  • the invention relates to a loader with at least one arm and a tool pivotally attached to it, which is guided in parallel.
  • the BOMFORD B3515 Drive-InLoader brochure discloses a front loader for attachment to an agricultural tractor, which has a loader arm and a tool pivotably connected to it, which can be designed in various ways.
  • the position of the tool is controlled via a mechanical parallel guide linkage, which is connected on the slave side to a plate on which the tool is also pivotally attached.
  • a hydraulic cylinder for pivoting the tool extends between the plate and the tool.
  • the plate, the loader arm and the tool have a common pivot bearing.
  • This front loader is disadvantageous in that the swivel range of the tool is rather small.
  • a front loader for moving bales is constructed, which emerges from US-A-5,150,999.
  • two arms, a parallel guide linkage and a tool with a mandrel for receiving the bale are connected to one another via essentially triangular plates.
  • a hydraulic cylinder is also attached to the plates which engages the tool at the other end to change its inclination to the ground.
  • This loader can only be used for this single purpose of bale transport and can pivot the tool in an even smaller area.
  • a telescopic loader is provided with only a single arm, on the free end of which is used to hold the material, a pallet fork is provided, which is guided by means of interconnected hydraulic servomotors over the entire pivoting range of the arm parallel to the floor although it is possible to pivot the pallet fork vertically in a small area.
  • a tipping linkage for a loader which has two pairs of links, one of which pivotally engages on a tool at one end and the other on an arm at one end. At the other end, the handlebars are articulated.
  • a servomotor designed as a hydraulic motor is pivotally attached to the tool at one end and to one of the handlebar pairs at the other end. When the servomotor is moved apart or moved together, it swivels both handlebars and thus changes the position of the tool in relation to the arm.
  • the servomotor is designed and arranged such that pressure is applied to the piston side when the tool is pivoted against the force of gravity and on the piston rod side when the tool is pivoted in the direction of gravity.
  • the object underlying the invention is seen in proposing a loader whose tool can be guided in parallel and pivoted through a larger angular range.
  • the guide linkage with the connection means (s) serves both for parallel guidance of the tool and as a basis or point of application for the positioning movement of the tool from the horizontal.
  • the arm can be designed as a single arm as in a telescopic loader or backhoe or as two arms on a loader arm of a front loader. Since all Link points are provided on the connection means, an existing loader can also be retrofitted. Since there is no joint joint between the tool, the arm and the connecting means, the tool can also pivot around a much larger area than with the loader according to the BOMFORD B3515 Drive-InLoader brochure.
  • Spreadable handlebars provided in pairs, which act on one end on the servomotor and on the other end on the tool or the connecting means, represent a scissor system which, with a slim design, provides a long travel range.
  • the servomotor If the servomotor is extended for loading, ie if pressure medium is applied to its piston side, it can apply the greatest force and thus generate a high loose torque. On the other hand, when the tool is unloaded in a double-acting hydraulic cylinder, the pressure medium is supplied on the piston rod side, which leads to a faster movement of the servomotor, since the quantity to be supplied is smaller with the same travel.
  • the articulation points are arranged in such a way that the guide linkage in an upper central area, the arm in a lower central area, a rear link in a rear area and the tool in a front area each pivotally engage the plate (s), the points of attack essentially form the corners of a quadrangle, there is an optimal utilization of the plate (s) forming the connecting means as a parallel guide member as well as a bearing and point of attack for the handlebars for the pivoting movement when loading and unloading the tool.
  • a loader 10 according to the invention is shown in the manner of a front loader, which is attached to a tractor 12 and is only shown in outline.
  • the loader 10 has right and left masts 14, of which only the right one can be seen in the direction of travel, and which are arranged on the side of the frame of the agricultural tractor 12 and attached to it in a known manner, not shown.
  • a swing arm of the loader 10 contains two arms 16 which run parallel to one another and are at a distance from one another in the transverse direction and are located on the opposite sides of the agricultural tractor 12 and their rear ends via corresponding bolts 18 below the upper ends of the masts 14 are pivotally attached to them.
  • a hydraulic lifting cylinder 20 is connected between each mast 14 and the associated arm 16.
  • a pair of brackets 22 having a transverse distance from one another, of which only the one on the right in the direction of travel can be seen, are connected to the rear of a tool 24 or equipment — in this case a shovel.
  • the brackets 22 it is also possible to use a pair of interconnected holders 25 (see FIG. 2) of a carrier 26 for tools 24 or equipment which have a transverse spacing from one another.
  • the pair of brackets 22 and brackets 25 are respectively connected to the front ends of the pair of arms 16 of the loader 10 in a manner which will be explained in more detail below.
  • a linkage assembly is provided between the upper ends of the two masts 14 and up to the pair of brackets 22 (FIG. 1) or holder 25 of the support 26 (FIG. 2), which has a guide linkage 27 and a tilting linkage 28.
  • the guide linkage 27 includes a rear guide link 30, the rear end portion of which is pivotally connected to the upper portion of the mast 14 by a bolt 32, and the front end portion of which is connected by a bolt 34 to a rear end portion of a lever-like plate assembly 36 which is a pair of identical ones and contains a transverse spacing of triangular plates.
  • a bottom portion or lower portion of the plate assembly 36 is pivotally connected to an arc portion of the respective arm 16 of the loader 10 by a bolt 38.
  • a front corner region of the plate assembly 36 is connected to a rear end of a front guide member 42 by means of a bolt 40.
  • this guide member 42 includes a forked front end portion formed by right and left ledges 44 and 46, respectively, which are provided on opposite sides of a parallelogram-shaped plate assembly which forms a connection means 48.
  • the connecting means 48 is composed of a pair of identical, spaced right and left plates 50 and 52, the front one
  • the end region of the right bar 44 is connected to an upper middle corner region of the plate 50 by means of a bolt 54 and the front end region of the left rail 46 is connected to a corresponding upper middle corner region of the left plate 52 by means of a bolt 56.
  • the plates 50 and 52 encompass the front end region of the respective arm 16 and are connected to this by means of a bolt 58 which extends through the plates 50, 52 at corresponding lower central corner regions.
  • each connection means 48 The front end regions of the spaced plates 50 and 52 of each connection means 48 are arranged such that they encompass one of the associated brackets 22 or the holder 25 of the carrier 26, the respective front end region thereof being pivotable by means of a bolt 60 to a lower section of the console 22 or the holder 25 is connected.
  • each tilt linkage 28 contains right and left rear links 64 and 66 and right and left front links 68 and 70.
  • the rear pair of links 64 and 66 has rear end regions which are located within the relevant rear corner regions of the parallelogram-shaped plates 50 and 52 and are connected to them by bolts 72, only one bolt 72 connecting the plate 52 to the handlebar 66 being shown.
  • the front pair of the links 68 and 70 is connected with its front corner or end regions to the adjacent brackets 22 or holder 25 by means of a bolt 74.
  • the servomotor 80 can be both a hydraulically or pneumatically acting piston-cylinder unit and an electric motor.
  • each holder 25 is designed so that it can be quickly connected to a tool 24 or equipment.
  • a rod 84 extends between and through upper regions of the holder 25, each of which contains an angle part 86 which is welded to the lower front corner region of the holder 25 and has an upright leg which forms a lower front contact surface.
  • the upright leg is provided with a central recess.
  • On the back of the tool 24 there is a pair of downwardly opening hooks 88 which cooperate with the rod 84 which connects the holders 25 and the closely opposite sides of each holder 25 receive the rod 84 closely.
  • a rearwardly extending, conical bolt 90 is provided, which is located in the leg of the angle part 86 provided with the recess.
  • pivoting back ie pivoting the tool 24 backwards
  • pivoting back can be effected by extending the servomotor 80 so that the connection points formed by bolts 72 and 74 are moved towards one another, which causes the tool 24 to move the pair of bolts 60, each connect the pair of brackets 22 or holders 25 to the parallelogram-shaped connecting means 48, swivels backwards.
  • the servomotors 80 are shown in a fully extended position and the tool 24 is shown in an entirely pivoted-back position by an angle of 43 degrees with respect to the horizontal. The tool 24 can be pivoted back so far in any position of the arms 16.
  • the tool 24 is shown in FIG. 1 with solid lines with the arms 16 raised in a completely tilted position, the angle between the horizontal and the lower reference line of the tool 24 being 90 degrees. This position can be achieved at any position of the arms 16 which is high enough that the tool 24 can pivot downward about its connecting means 48 without touching the ground or an underlying obstacle.
EP96107712A 1995-05-22 1996-05-15 Chargeur avec mécanisme de commande du déplacement parallèle pour outil de travail Expired - Lifetime EP0744500B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/445,807 US5533856A (en) 1995-05-22 1995-05-22 Combined loaded self-leveling and implement tilt linkages for effecting true level and enhanced roll back and dump characteristics throughout lift range of loader
US445807 1995-05-22

Publications (3)

Publication Number Publication Date
EP0744500A2 true EP0744500A2 (fr) 1996-11-27
EP0744500A3 EP0744500A3 (fr) 1997-07-23
EP0744500B1 EP0744500B1 (fr) 2002-01-02

Family

ID=23770274

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96107712A Expired - Lifetime EP0744500B1 (fr) 1995-05-22 1996-05-15 Chargeur avec mécanisme de commande du déplacement parallèle pour outil de travail

Country Status (4)

Country Link
US (1) US5533856A (fr)
EP (1) EP0744500B1 (fr)
CA (1) CA2173396C (fr)
DE (1) DE59608528D1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020047465A1 (fr) * 2018-08-31 2020-03-05 Clark Equipment Company Système de mise à niveau de bras de levage

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5678979A (en) * 1995-08-01 1997-10-21 Kovacs; Geza Tilt linkage system for load elevating vehicles
GB2340816B (en) * 1998-08-25 2002-10-09 Agco Gmbh & Co Adjustable arm length for front-end loader
US6830112B2 (en) 2001-10-26 2004-12-14 Mtd Products Inc Front hitch system
SE528914C2 (sv) * 2004-09-29 2007-03-13 Aaloe Ab Lastare innefattande två parallellt anordnade armkonstruktioner som i sin tur innefattar långsträckta armpartier och parallellstag
SE531215C2 (sv) * 2004-09-29 2009-01-20 Aaloe Ab Lastare innefattande två armdelar försett med ett utrymme i vilket slangar/ledningar är dragna
US20110150616A1 (en) * 2009-12-17 2011-06-23 Caterpillar Inc Linkage For An Earth-moving Machine
US10544561B2 (en) 2017-12-04 2020-01-28 C.A. Hull Co., Inc. Collector assembly
WO2020160298A1 (fr) * 2019-01-30 2020-08-06 Clark Equipment Company Structure de bras de levage auto-nivelant mécanique pour une machine électrique, en particulier un mini-chargeur
CA3217293A1 (fr) * 2021-05-21 2022-11-24 David Glasser Ensemble bras de levage autonivelant pour machines electriques

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1481066A1 (de) * 1965-08-09 1969-02-06 Baldwin Lima Hamilton Corp Frontlader
US4046026A (en) * 1975-01-08 1977-09-06 Sveska Hymas Aktiebolag Linkage and motion system, especially for accomplishing a swinging movement in equipment such as buckets for power shovels and the like
US5150999A (en) * 1990-10-09 1992-09-29 Dugan Joe W Bale lifter and mover

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2978124A (en) * 1957-10-11 1961-04-04 Gen Motors Corp Cradle loader
US3061117A (en) * 1958-12-11 1962-10-30 Marvin F Kruse Weight gauge for hydraulic loader
USRE29197E (en) * 1959-02-26 1977-05-03 Matbro Limited Shovel loaders
US3080076A (en) * 1959-10-21 1963-03-05 Insley Mfg Corp Loading machine
US3767075A (en) * 1971-11-22 1973-10-23 Gehl Co Bucket loader
US4674944A (en) * 1985-12-27 1987-06-23 Kidde, Inc. Forklift variable reach mechanism
US4964778A (en) * 1989-07-27 1990-10-23 Kidde Industries, Inc. Forklift truck having a telescopic auxiliary boom articulated to a telescopic main boom
US5238357A (en) * 1989-11-22 1993-08-24 Intermodal Technologies, Inc. Bulk materials transportation system
US5135347A (en) * 1990-03-30 1992-08-04 Kaczmarczyk Edward T Loader mounting
US5387076A (en) * 1993-08-23 1995-02-07 Deere & Company Structure for attaching a loader to a tractor

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1481066A1 (de) * 1965-08-09 1969-02-06 Baldwin Lima Hamilton Corp Frontlader
US4046026A (en) * 1975-01-08 1977-09-06 Sveska Hymas Aktiebolag Linkage and motion system, especially for accomplishing a swinging movement in equipment such as buckets for power shovels and the like
US5150999A (en) * 1990-10-09 1992-09-29 Dugan Joe W Bale lifter and mover

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020047465A1 (fr) * 2018-08-31 2020-03-05 Clark Equipment Company Système de mise à niveau de bras de levage
US11105065B2 (en) 2018-08-31 2021-08-31 Clark Equipment Company Lift arm leveling system

Also Published As

Publication number Publication date
EP0744500B1 (fr) 2002-01-02
US5533856A (en) 1996-07-09
EP0744500A3 (fr) 1997-07-23
CA2173396A1 (fr) 1996-11-23
DE59608528D1 (de) 2002-02-07
CA2173396C (fr) 1999-07-06

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