EP0493730B1 - Retropelleteuse avec dispositif de verrouillage - Google Patents

Retropelleteuse avec dispositif de verrouillage Download PDF

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Publication number
EP0493730B1
EP0493730B1 EP91121464A EP91121464A EP0493730B1 EP 0493730 B1 EP0493730 B1 EP 0493730B1 EP 91121464 A EP91121464 A EP 91121464A EP 91121464 A EP91121464 A EP 91121464A EP 0493730 B1 EP0493730 B1 EP 0493730B1
Authority
EP
European Patent Office
Prior art keywords
backhoe
boom
locking
locking member
backhoe 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
EP91121464A
Other languages
German (de)
English (en)
Other versions
EP0493730A1 (fr
Inventor
Steven Wayne Ahlers
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 EP0493730A1 publication Critical patent/EP0493730A1/fr
Application granted granted Critical
Publication of EP0493730B1 publication Critical patent/EP0493730B1/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
    • E02F3/36—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
    • E02F3/388—Mechanical locking means for booms or arms against rotation, e.g. during transport of the machine

Definitions

  • the invention relates to a backhoe with a swiveling frame that can be pivoted horizontally to a vehicle, in particular to a tractor, and to a backhoe boom that is articulated to the swiveling frame via a horizontally extending cross pin and that can be adjusted between a substantially vertical transport position and various working positions.
  • a hydraulically actuated cylinder one end of the swing frame and the other end of the backhoe boom and a locking device between the swing frame and the backhoe boom for locking the vertical pivoting movement of the backhoe boom in its transport position, which has a locking member vertically pivotally connected to the swing frame, which in the transport position of the backhoe boom in at least a catch recess, which is provided in a locking part arranged on the backhoe boom, can snap into place.
  • Such backhoes are required by the construction industry for a wide variety of uses. They are used for excavating soil, but can also be used as cranes. When they are used, the associated vehicle is usually jacked up on the rear side by means of correspondingly extendable stabilizing supports, so that it is reliably stable. If, on the other hand, you are not working with the backhoe, but you are working with the vehicle carrying the backhoe or if the vehicle is being moved to another location, the backhoe must be secured in its transport position accordingly. Simple fuses consist of a cross bolt which is inserted through through holes provided for this purpose on the backhoe boom and on the swivel frame. Such a backup is complex.
  • the through holes must be brought into mutual alignment by manipulation of the cylinder so that an operator - usually the driver - can insert the cross bolt, which can easily be lost. All of this means an additional effort that is spared in many cases. It has therefore started to build automatic locking devices that automatically determine the backhoe boom in its transport position.
  • a semi-automatic locking device is provided in the backhoe from which the invention is based (US-A-4 260 321).
  • the locking member is T-shaped, and the catch recesses are open at the bottom.
  • To lock the locking member must be pivoted downwards via a manually operable rod so that the locking part can be pivoted in the transport position over the locking member or the cylinder pin provided on it.
  • the rod is then actuated again in such a way that the cylinder pins pivot upward into the catch recesses, after which the rod is to be locked accordingly. Unlocking also takes place via the rod, whereby considerable muscle strength must be applied so that the cylinder pins can emerge from the catch recesses.
  • the locking member In the unlocked position, the locking member is held by a spring.
  • the object to be achieved with the invention is seen in a simple, reliable and permanent device for fixing the backhoe boom in its transport position.
  • the invention therefore provides that the catch recess of the locking part is open at the top and that an adjustable stop is provided against which the backhoe boom can be brought into contact and which is arranged on the swivel frame in such a way that it allows the backhoe boom to move beyond the transport position.
  • the locking member is T-shaped, engages with the base in a vertically pivotable manner on the pivot frame and has two cylinder journals which extend horizontally outwards from opposite sides of the base and in the transport position of the backhoe boom can engage in a catch recess of a locking part, which are fixedly arranged at a mutual lateral distance on the backhoe boom, the locking parts being hook-shaped and having a bevel at their ends facing the swivel frame, over which the cylinder pins of the locking member in the catch recesses can slip when pivoting the backhoe boom.
  • the locking member is provided with an adjustable stop member which is effective against the pivot frame and can be adjusted so that an adjustment of the locking member in its position in which the locking parts are above the locking member is prevented.
  • the stop part can be designed in a simple manner as a screw that can be screwed into the locking member.
  • the invention also provides that the catch recesses have a front surface shaped in such a way that the cylinder pins of the locking member can only be detached from the catch recesses when the backhoe boom is against the stop.
  • the front of each catch pocket exerts a corresponding force on the locking member, via which the locking member is held in its locking position.
  • To unlock the hydraulic cylinder can then be actuated, whereby the backhoe boom swings beyond its transport position and the locking member can be unlocked by hand.
  • two stops can be provided on the swivel frame with lateral transverse spacing from one another, against which wear strips on the rear excavator boom can be brought into contact.
  • each stop can be provided with an inclined stop surface against which the correspondingly inclined in the transport position of the backhoe boom running wear strips can be brought to the system, and have a vertically running elongated hole for its adjustment.
  • Each stop can then be fixed by means of a screw, the expediently straight side remote from the stop surface being supported against a correspondingly long shoulder on the swivel frame.
  • a tractor which has two rear drive wheels 12 and two steerable front wheels 14. Between the rear driving wheels, a driver's cab 16 is provided for the tractor, which in the exemplary embodiment is surrounded by a cabin. In front of the driver's cab is an internal combustion engine, not shown, through a bonnet 18 is covered.
  • the tractor is equipped for use in the construction industry and has a loading shovel 20 at its front end and a rear excavator 22 at its rear end. Both devices are controlled via corresponding control levers in the cabin, namely the loading shovel when a driver's seat is facing forward and the backhoe 22 when the driver's seat has been rotated 180 ° backwards.
  • two stabilizing supports 24 are also provided at the rear end of the tractor 10. They can be used to jack up the rear of the tractor when working with the backhoe 22 to stabilize the tractor.
  • an upper and rearwardly extending triangular support plate 26 and a similarly designed lower support plate 28 are also provided in a known manner. They serve for the attachment of the backhoe 22.
  • the backhoe 22 has a swivel frame 30 which is connected to the support plates 26 and 28 by means of two vertically running pivot pins 32 and 36.
  • two upper extension arms 34 of the pivot frame 30 are connected to the rear end of the upper support plate 26 via the upper pivot pin 32 and two lower extension arms 38 of the pivot frame are connected to the rear end of the lower support plate 28 via the lower pivot pin 36. Both pivot pins are arranged coaxially to one another.
  • the swivel frame 30 can be swiveled via two swivel cylinders 39 which are provided between the tractor and the swivel frame.
  • a rear excavator boom 40 is connected with its lower end via a cross pin 42 to the rear lower end of the swivel frame 30.
  • the backhoe boom is between a substantially vertically directed and indicated in Fig. 2 transport position and one A variety of working positions adjustable. One of these working positions can be seen in Fig. 1.
  • a hydraulically actuated cylinder 44 is used to adjust the rear excavator boom, the lower end of the piston rod side of which is connected to the rear upper end of the swivel frame 30 via a transverse pin 46 running parallel to the transverse pin 42.
  • the upper or cylinder-side end of the cylinder 44 is connected in a known manner to an inner wall of the hollow excavator boom.
  • a dipper stick 48 connects to the upper end of the backhoe boom.
  • the dipper stick is also vertically adjustable, for which purpose a cylinder 50 is provided. This engages on one end on the rear excavator boom and on the other end on the rear end of the dipper stick.
  • An excavator shovel 52 is articulated to the end of the dipper stick. Their position is controlled by a cylinder 54.
  • the backhoe boom 40 essentially consists of two approximately triangular side plates 56, on the end faces of which slightly above the lower transverse pin 42, two wear strips 58 are attached.
  • An adjustable stop 60 can be provided on both sides of the swing frame. In the drawing, only a single stop 60 is shown.
  • the stop 60 has a rear, inclined stop surface 62 which runs parallel to one of the wear strips 58 and comes to bear against a wear strip when the rear excavator boom has been pivoted beyond its transport position, as is indicated in FIG. 2. From Fig. 2 it can be seen that the stop 60 is connected via a screw 64 to the pivot frame 30, which is guided through a vertically extending slot 66, which is incorporated in the stop 60. To this The stop 60 can be easily adjusted.
  • the screw 64 For its adjustment, only the screw 64 needs to be loosened, after which the stop can be adjusted in height as a result of its elongated hole. As soon as the stop has reached its desired position, the screw 64 only needs to be tightened again. With this adjustability, wear on a wide variety of components can be compensated. For the rest, the stop limits a movement of the backhoe boom forward beyond its transport position.
  • Two approximately hook-shaped locking parts 68 are attached to the side walls 56 of the backhoe boom and extend from these to the front. They are located above the wear strips 58 and in the transport position above the upper cross pin 46.
  • the locking parts 68 are of identical design, which is why only the right locking part, which can be seen in FIGS. 2 to 4, is discussed in detail below.
  • the locking part 68 consists of an upright plate into which an upwardly open catch recess 70 is incorporated.
  • the catch recess 70 as can be seen in particular from FIG. 4, has a curved bottom which merges into an approximately straight front surface 72.
  • the front surface runs parallel to the lower parts of the front edges of the side plates. Its rear surface 74 is inclined.
  • the tip of the locking parts 68 is designed as a bevel 76 which slopes backwards and upwards and ends at the upper end of the front surface 72.
  • a T-shaped locking member 78 has a fork-shaped base 80.
  • the crossbar of the T consists of two cylinder journals 82 which extend outwards on both sides from the rear end of the base.
  • the front end of the base 80 which is remote from the cylinder pin 82, is connected to the upper side via a cross pin 84 of the swivel frame 30 articulated, for which purpose the swivel frame is provided with corresponding bearing eyes.
  • the locking member 78 can thus pivot vertically about its bearing point.
  • a nose 86 is still located at the foremost end of the locking member. It can come to rest against the swivel frame and thus prevents the locking member from being adjusted beyond its vertical position.
  • the rear end of a cable 88 is connected to the locking member 78, to the rear of the cross pin 84 via a ball pin connection 90. As soon as a pull is exerted on the cable 88, the locking member can then pivot up and forward about its articulation point. The front end of the cable 88 is connected to a hand lever on the driver's station 16. The locking device can thus be actuated from the driver's station 16.
  • the upper arms 34 of the swivel frame 30 are also provided with mutually aligned vertical bores 92, which are also aligned with a bore 94 in the upper support plate 26 when the swivel frame 30 is in its central position shown in FIG. 3. In this central position, a pin 96 can then be inserted into the bores 92 and 94, as a result of which the swivel frame 30 is also fixed against rotation, which is desirable for transport trips.
  • the locking member 78 is in its position shown in solid lines in FIG. 4. In this position, the locking member is not detected by the locking part 68 when the backhoe boom 40 is moved into its transport position. There is then no automatic locking. On the other hand, should the backhoe boom, especially for transport trips or if the backhoe is used as a crane, are locked, the operator pulls on the cable 88 until the locking member has reached the position shown in broken lines in FIG. 4.
  • the bevels 76 of the locking parts 68 when the backhoe boom is pivoted into its vertical transport position, will grip the cylinder pins 82 of the locking member 78 from below and thereby move the locking member upwards and forwards until the cylinder pins 82 into the catch recesses 70 of the Locking parts can fall.
  • the pivoting process of the backhoe boom in the counterclockwise direction is ended and, due to the weight of the backhoe boom, which tends to pivot the backhoe boom clockwise, the front surfaces 72 of the catch recesses 70 become fixed on the locking parts 68 bear against the cylinder pin 82 of the locking member 78.
  • Locking member 78 is also provided with a screw-in stop screw 98. It enables automatic locking when it is unscrewed so far that it lifts the locking member into a position in which it can be gripped by the bevels 76 on the locking parts 68 when the backhoe boom approaches its transport position. If automatic locking is not required, the stop screw 98 only needs to be unscrewed completely so that the locking member can return to its rest position, in which the locking parts 68 can no longer grip the locking member 78.

Landscapes

  • 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)
  • Soil Working Implements (AREA)

Claims (6)

  1. Rétro-pelle mécanique (22) comportant un cadre pivotant (30) qui peut être raccordé notamment à un tracteur (10) de manière à pouvoir pivoter horizontalement, une flèche (40) de la rétro-pelle mécanique, reliée d'une manière articulée au cadre pivotant (30) par l'intermédiaire d'un axe transversal horizontal (42) et qui est déplaçable entre une position de transport sensiblement verticale et différentes positions de travail, un vérin (44) qui peut être chargé hydrauliquement et attaque d'une part le cadre pivotant (30) et d'autre part la flèche (40) de la rétro-pelle mécanique et un dispositif de verrouillage situé entre le cadre pivotant (30) et la flèche (40) de la rétro-pelle mécanique pour le blocage du mouvement de pivotement vertical de cette dernière dans sa position de transport, ce dispositif de verrouillage comportant un organe de blocage (78) qui est relié au cadre pivotant (30) de manière à pouvoir pivoter verticalement et qui, lorsque la flèche (40) de la rétro-pelle mécanique est dans la position de transport, peut s'encliqueter dans au moins un logement de réception (70), qui est prévu dans une partie de verrouillage (68) montée fixe sur la flèche (40) de la rétro-pelle mécanique, caractérisée en ce que le logement de réception (70) de la partie de verrouillage (68) est ouvert vers le haut et qu'il est prévu une butée réglable (60), contre laquelle la flèche (40) de la rétro-pelle mécanique peut venir s'appliquer et qui est disposée sur le cadre pivotant (30) de telle sorte qu'elle autorise un déplacement de la flèche (40) de la rétro-pelle mécanique au-delà de la position de transport.
  2. Rétro-pelle mécanique selon la revendication 1, dans laquelle l'organe de blocage (78) attaque, par sa base, le cadre pivotant (30) de manière à pouvoir pivoter verticalement et comporte deux embouts cylindriques (82), qui s'étendent horizontalement vers l'extérieur à partir de côtés opposés de la base et qui, lorsque la flèche (40) de la rétro-pelle mécanique est dans la position de transport, peuvent s'engager dans des logements respectifs de réception en forme de crochets (70) d'une partie de verrouillage (68), qui sont disposées de façon fixe à une distance latérale réciproque sur la flèche (40) de la rétro-pelle mécanique, caractérisée en ce que les parties de verrouillage (68) possèdent, sur leurs extrémités tournées vers le cadre pivotant (30), une rampe (76), sur laquelle les embouts cylindriques (82) de l'organe de blocage (78) peuvent glisser en pénétrant dans les logements de réception (70) lors du basculement de la flèche (40) de la rétro-pelle mécanique.
  3. Rétro-pelle mécanique selon la revendication 1 ou 2, caractérisée en ce que l'organe de blocage (78) comporte une partie de butée réglable, qui peut agir par rapport au cadre pivotant (30) et peut être réglée de manière à empêcher la venue de l'organe de blocage dans une position, dans laquelle les parties de verrouillage (68) sont situées au-dessus de l'organe de blocage (78).
  4. Rétro-pelle mécanique selon une ou plusieurs des revendications précédentes, caractérisée en ce que les logements de réception (70) possèdent une surface frontale (72) conformée de belle sorte que les embouts cylindriques (82) de l'organe de blocage (78) peuvent être dégagés des logements de réception (70) uniquement lorsque la flèche (40) de la rétro-pelle mécanique est appliquée contre la butée (60).
  5. Rétro-pelle mécanique selon une ou plusieurs des revendications précédentes, caractérisée en ce que sur le cadre pivotant (30) sont prévues deux butées (60), qui sont disposées à une certaine distance transversale latérale l'une de l'autre et peuvent s'appliquer contre les barrettes d'usure (58) situées sur la flèche (40) de la rétro-pelle mécanique.
  6. Rétro-pelle mécanique selon la revendication 5, caractérisée en ce que chaque butée (60) est pourvue d'une surface oblique de butée (62), contre laquelle peuvent s'appliquer les barrettes d'usure (58) qui s'étendent obliquement lorsque la flèche (40) de la rétro-pelle mécanique est dans la position de transport, et comporte, pour son réglage, un trou allongé vertical (66).
EP91121464A 1991-01-02 1991-12-14 Retropelleteuse avec dispositif de verrouillage Expired - Lifetime EP0493730B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US636657 1991-01-02
US07/636,657 US5064339A (en) 1991-01-02 1991-01-02 Backhoe boom lock

Publications (2)

Publication Number Publication Date
EP0493730A1 EP0493730A1 (fr) 1992-07-08
EP0493730B1 true EP0493730B1 (fr) 1995-03-01

Family

ID=24552812

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91121464A Expired - Lifetime EP0493730B1 (fr) 1991-01-02 1991-12-14 Retropelleteuse avec dispositif de verrouillage

Country Status (4)

Country Link
US (1) US5064339A (fr)
EP (1) EP0493730B1 (fr)
DE (1) DE59104797D1 (fr)
ES (1) ES2068478T3 (fr)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5967737A (en) * 1997-10-31 1999-10-19 Deere & Company Backhoe boom lock
DE19755616C1 (de) * 1997-12-13 1999-06-02 Orenstein & Koppel Ag Verstelleinrichtung für ein bewegliches Arbeitsgerät einer mobilen Arbeitsmaschine
AUPR371501A0 (en) * 2001-03-14 2001-04-12 Wright, Stewart James Dampening apparatus
US6612636B2 (en) 2001-08-29 2003-09-02 Deere & Company Hand reference for control panel of utility vehicle
US6725583B2 (en) 2001-10-19 2004-04-27 Deere & Co. Rear-mounted implement mounting system
US6648582B2 (en) 2002-03-26 2003-11-18 Deere & Company Boom lock
US6705644B2 (en) * 2002-07-24 2004-03-16 Deere & Company Latching mechanism for machine stabilizer arms
US7056079B2 (en) * 2003-11-10 2006-06-06 Caterpillar Inc. Linkage assembly restraint
JP4247211B2 (ja) * 2005-07-05 2009-04-02 ヤンマー株式会社 トラクタ・ローダ・バックホーにおける掘削装置のロック機構
US7618229B2 (en) 2007-06-27 2009-11-17 Deere & Company Boom lock for work machine and associated method
US8998559B2 (en) 2011-09-16 2015-04-07 Deere & Company Reduced effort manual boom lock
GB2512414B (en) * 2013-03-22 2016-08-10 Cumitas Arge Muhendislik Bilisim Yazilim Danismanlik Sanayi Ve Ticaret Ltd Sti A locking system
WO2019227471A1 (fr) * 2018-06-01 2019-12-05 Guangxi Liugong Machinery Co., Ltd. Système de verrouillage destiné à un engin de chantier
US10550541B1 (en) 2019-04-25 2020-02-04 Deere & Company Connection system for connecting an implement to a work vehicle
US11536009B2 (en) 2019-07-26 2022-12-27 Deere & Company System for detecting locking pin engagement of an implement
USD931909S1 (en) 2020-02-04 2021-09-28 Deere & Company Implement connection system

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US1802741A (en) * 1928-07-11 1931-04-28 Harold D Stephens Doorcheck
US3734320A (en) * 1972-01-12 1973-05-22 Case Co J I Support means for boom ram
US4225282A (en) * 1978-06-26 1980-09-30 Ford Motor Company Backhoe boom transport locking means
US4227852A (en) * 1979-01-23 1980-10-14 J. I. Case Company Releasable backhoe boom lock
US4278394A (en) * 1979-06-04 1981-07-14 J. I. Case Company Releasable boom lock
US4260321A (en) * 1979-09-04 1981-04-07 Deere & Company Lock mechanism for securing a backhoe boom and swing frame for transport
US4273503A (en) * 1979-10-01 1981-06-16 Damron Tony R Pressure-fluid supply system
US4636132A (en) * 1983-06-06 1987-01-13 Caterpillar Inc. Vehicle boom lock
US4887938A (en) * 1988-08-01 1989-12-19 Caterpillar Inc. Controllable locking apparatus for implement carrying work vehicle

Also Published As

Publication number Publication date
US5064339A (en) 1991-11-12
DE59104797D1 (de) 1995-04-06
ES2068478T3 (es) 1995-04-16
EP0493730A1 (fr) 1992-07-08

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