EP3689813B1 - Chariot élévateur à mât rétractable - Google Patents

Chariot élévateur à mât rétractable Download PDF

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Publication number
EP3689813B1
EP3689813B1 EP19154684.5A EP19154684A EP3689813B1 EP 3689813 B1 EP3689813 B1 EP 3689813B1 EP 19154684 A EP19154684 A EP 19154684A EP 3689813 B1 EP3689813 B1 EP 3689813B1
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EP
European Patent Office
Prior art keywords
arms
wheel
wheel arms
bearing elements
running
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.)
Active
Application number
EP19154684.5A
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German (de)
English (en)
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EP3689813A1 (fr
Inventor
Matthias Stubbe
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.)
Jungheinrich AG
Original Assignee
Jungheinrich AG
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 Jungheinrich AG filed Critical Jungheinrich AG
Priority to EP19154684.5A priority Critical patent/EP3689813B1/fr
Publication of EP3689813A1 publication Critical patent/EP3689813A1/fr
Application granted granted Critical
Publication of EP3689813B1 publication Critical patent/EP3689813B1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
    • B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
    • B66F9/075—Constructional features or details
    • B66F9/07513—Details concerning the chassis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
    • B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
    • B66F9/075—Constructional features or details
    • B66F9/08—Masts; Guides; Chains
    • B66F9/10—Masts; Guides; Chains movable in a horizontal direction relative to truck

Definitions

  • the invention relates to a reach truck with a drive part and a load part
  • the drive part comprising a drive frame with two wheel arms running parallel to one another and a base frame connecting the wheel arms to one another, with a first guide means being arranged on each of the wheel arms
  • the load part comprising a mast holder with two side arms running parallel to one another and a cross member connecting the side arms to one another, a second guide means being arranged on each of the side arms, the side arms of the mast holder extending parallel to the wheel arms of the drive frame, so that in each case one of the side arms runs adjacent to one of the wheel arms, wherein in each case the first guide means of a wheel arm cooperates with the second guide means of the adjacent side arm in such a way that the mast holder is movably guided on the wheel arms.
  • Such reach trucks are used to move goods, especially in tight spaces.
  • the stability of reach trucks is usually not achieved by a counterweight, but by wheel arms extending forward from the reach truck.
  • These wheel arms form part of the drive frame of the reach truck, it usually also being possible for a motor, for example an electric motor including batteries, to be arranged in the drive frame.
  • the load part which usually comprises a mast holder and an extendable mast arranged on the mast holder, is guided on the wheel arms via guide means. This guidance takes place via guide means arranged on the side arms of the mast holder and enables the mast holder to be moved along the wheel arms of the drive frame.
  • the load part is supported against the ground by the wheel arms or by wheels arranged on the wheel arms.
  • the wheel arms can be connected to one another in the area of the base frame by different reinforcing means.
  • a connecting plate extending parallel to the floor can be provided which - in addition to the base frame - connects the wheel arms to one another.
  • a traverse can also be provided, formed for example by a further connecting plate which extends perpendicularly with respect to the floor from one wheel arm to the other.
  • Reinforcement means of this type are, however, complex to assemble, particularly as welded assemblies.
  • reinforcing means counteract the spreading of the wheel arms essentially only in the area of the base frame, while spreading is not optimally counteracted at the free ends of the wheel arms.
  • U.S. 5,641,261 A relates to a reach truck in which the spreading of the wheel arms is counteracted by means of bearing elements arranged on the mast holder by introducing the forces into the mast holder.
  • the invention is based on the object of providing a reach truck that ensures safe transport of the loads over the entire reach even with large loads.
  • the reach truck according to the invention of the type mentioned at the beginning comprises a cross connector which extends from one wheel arm to the other wheel arm and connects the two wheel arms to one another.
  • the cross connector is movably guided on the wheel arms together with the mast holder and is in engagement with the wheel arms via bearing elements in such a way that the cross connector limits a movement of the wheel arms outward away from one another.
  • the mast holder forms a U-shape with its cross member and the side arms extending therefrom, as does the drive frame with its base frame and the wheel arms extending therefrom.
  • the mast holder and thus the load part of the reach truck is guided over the wheel arms on the drive frame and thus the drive part.
  • first guide means arranged on the wheel arms are provided, which interact with second guide means arranged on the side arms.
  • a side arm is guided on the respective adjacent wheel arm via the respective first and second guide means.
  • the U-shaped mast holder is thus mounted within the U-shaped drive frame.
  • the entire load part can be extended in the direction of travel of the reach truck and retracted against the direction of travel of the reach truck, with the side arms moving along the wheel arms.
  • a cross connector connecting the wheel arms to one another is now provided.
  • the cross connector extends transversely to the wheel arms, can in particular stand perpendicular to the wheel arms.
  • the cross connector can comprise an elongate connecting element which runs from wheel arm to wheel arm.
  • the bearing elements with which the transverse connector is in engagement with the wheel arms can be provided at the opposite longitudinal ends of the connecting element.
  • Corresponding bearing elements can be provided on the respective wheel arms.
  • the cross connector can only establish the connection between the wheel arms via these bearing elements.
  • the cross connector is in engagement with the wheel arms in such a way that it limits a movement of the wheel arms outward away from one another.
  • the cross connector can grip behind each of the wheel arms in a clamped manner and thus limit the movement of the wheel arms outward away from one another.
  • the cross connector can counteract the aforementioned spreading of the wheel arms. If there is a weight on the load part, for example on a mast connected to the mast holder, its weight is distributed over the wheel arms, which results in a force spreading the wheel arms apart. This spreading force pushes the wheel arms outward from one another, that is, in opposite directions on an axis perpendicular to the axis of movement of the mast holder and parallel to the ground. The cross connector counteracts this force and thus holds the wheel arms together by attacking the wheel arms directly. In contrast to the reach truck explained at the beginning with the L-connectors, the spreading is not countered by the mast holder but by the cross connector. The forces pushing the wheel arms outward are therefore essentially only absorbed by the cross connector.
  • the cross connector is in engagement with the wheel arms via the bearing elements in such a way that the cross connector can still be moved relative to the wheel arms.
  • the cross connector is guided on the wheel arms so as to be movable in particular via the bearing elements. Since the cross connector can be moved together with the mast holder and its movement is coupled in particular to that of the mast holder, the Cross connectors always act at the location of the greatest forces spreading the wheel arms.
  • the cross connector can be connected to the mast holder, but preferably in such a way that the forces that spread the wheel arms are not introduced into the mast holder.
  • the invention thus advantageously allows a reliable stabilization of the wheel arms over the entire length of the wheel arms.
  • the reach truck can move a load on a mast of the mast holder safely over its entire reach.
  • the cross connector engages behind the wheel arms in a clamped manner via the bearing elements.
  • the engagement of the cross connector according to the invention in the wheel arms can take place via such a rear engagement in such a way that a movement of the wheel arms away from one another is limited outward.
  • the bearing elements with which the cross connector engages behind the wheel arms can be provided in each case.
  • the cross connector is suspended from the mast holder.
  • the cross connector can be connected to the cross member and / or one or both of the side arms of the mast holder via one or more suspensions.
  • the movement of the cross connector along the wheel arms can be coupled to the mast holder and the joint mobility of mast holder and cross connector can thus be achieved in a simple manner.
  • no introduction of the forces that spread the wheel arms from the transverse connector into the mast holder takes place via this suspension.
  • the suspension is therefore in particular such that only the joint mobility of the mast holder and cross connector along the wheel arms is guaranteed.
  • the bearing elements comprise first bearing elements arranged on the two wheel arms and on opposite end sections of the Cross connector arranged second bearing elements, wherein one of the first bearing elements is in engagement with one of the second bearing elements.
  • the bearing elements via which the cross connector is in engagement with the wheel arms for holding the wheel arms together, can be implemented on each wheel arm by first and second bearing elements that interact with one another.
  • the second bearing elements of the cross connector consequently interact with the first bearing elements arranged on the wheel arms in such a way that a movement of the wheel arms away from one another is limited outward.
  • the second bearing elements engage with the first bearing elements in a clamped manner, so that the transverse connector holds the wheel arms of the drive frame together in a clamped manner, as explained above.
  • the first bearing elements each have an outward-facing running surface and the second bearing elements each have at least one running element running along the respective adjacent running surface or the second bearing elements each have an inward-facing running surface and the first bearing elements each have at least one of the respective adjacent running surface along running element.
  • the running elements each have at least one running roller.
  • a sliding piece can alternatively or additionally be provided as a design of the running element. It can therefore be provided, for example, that the first bearing element of the left wheel arm comprises an outwardly facing running surface, while the corresponding second bearing element arranged on the cross connector comprises at least one running element that runs along the running surface of the left wheel arm.
  • the interacting first and second bearing elements are thus made up of running surfaces formed along each of which at least one running element, such as a roller or a slider, runs along.
  • the running surfaces can always point away from the wheel arms in such a way that the running elements grip behind the running surfaces in a clamped manner and thus limit the wheel arms from spreading outward from one another.
  • the aforementioned clamping bracket is ensured in a particularly simple manner.
  • the axes of rotation of the rollers run perpendicular to a floor carrying the reach truck and parallel to the running surfaces when the reach truck is in operation.
  • the rollers are consequently mounted on the in such a way that their axes of rotation are arranged perpendicular to a floor supporting the reach truck and parallel to the running surfaces.
  • the rollers can run along the running surfaces.
  • the sliding pieces slide along the running surfaces.
  • the running surfaces can then be understood as sliding surfaces.
  • the first guide means are each arranged on the inside of the wheel arms and the second guide means are each arranged on the outside of the side arms, the respective inside of a wheel arm facing the respective outside of the adjacent side arm.
  • the first guide means each have a guide rail and the second guide means each have at least one guide roller, the guide rollers of the respective second guide means being guided on the adjacent guide rail of the first guide means.
  • the wheel arms can therefore have guide rails on their inner sides, on which the guide rollers of the respective adjacent side arm are guided.
  • the left side arm can have one or more guide rollers on its outside facing the left wheel arm, which are guided on the opposite guide rail.
  • the guide rails can extend from the wheel arms in the direction of the side arms.
  • the axes of rotation of the guide rollers during operation of the reach truck run horizontally to a floor supporting the reach truck.
  • the guide rollers can run along the guide rails, which also extend horizontally to the ground and point away from the inside of the wheel arms.
  • the axes of rotation of the guide rollers can be arranged perpendicular to the running surfaces of the bearing elements.
  • the guide rollers can move in particular in a plane perpendicular to the rollers.
  • the guide rollers are used here to securely hold and guide the mast holder on the wheel arms, while the rollers of the bearing elements only serve to counteract the spreading of the wheel arms.
  • FIG 1 shows a schematic view of a reach truck with a drive part 100 and a load part 200.
  • the drive part 100 includes, among other things, an electric motor (not shown) and an electric battery (not shown) for driving the reach truck.
  • the drive part 100 comprises a drive frame 102 with a base frame 106 and two wheel arms 104, 104 'extending from this base frame and extending parallel to one another ( Figures 2 to 4 ).
  • the base frame 106 is preferably a sprue.
  • projections 140 can be provided on each of the wheel arms 104, 104', which engage in receptacles 141 of the base frame 106 (see esp. Fig. 3 ).
  • the wheel arms 104, 104 'each have first guide means designed as guide rails 112, 112' as well as wheel arches 105, 105 'arranged at the end of the wheel arms for receiving wheels, as in particular in FIG Figures 2 and 3 to recognize.
  • the load part 200 comprises a mast 300 and a mast holder 202, it being possible for forks (not shown) for receiving a load, for example, to be arranged on the mast.
  • the mast holder 202 comprises a cross member 206 which connects two side arms 204, 204 'running parallel to one another.
  • the mast holder 202 has two mast attachments 209 which extend vertically upward at the ends of the side arms 204, 204 ′ and are connected to one another by a cross piece 207.
  • the mast attachments 209 are used to hold the mast 300.
  • Figure 5 shows different views of a drive frame 102 together with the mast holder 202 stored therein, the drive frame and mast holder basically being the same Figure 2 correspond.
  • Figure 5a shows a front view
  • Figure 5b a side view
  • Figure 5c a sectional view along the section line BB of Figure 5b .
  • guide rollers 212a, 212a ' are arranged as second guide means.
  • the mast holder 202 is mounted on the guide rails 112, 112 'of the wheel arms 104, 104' of the drive frame 102 via the guide rollers 212a, 212a '.
  • the mast holder 202 is held via its guide roller 212a on the guide rail 112 of the wheel arm 104 and via its guide roller 212a 'on the guide rail 112' of the wheel arm 104 '.
  • the mast holder 202 is movably mounted on the drive frame 102 via the guide means.
  • FIG. 11 shows a section through drive frame 102 and mast holder 202 along the line in FIG Figure 5b cutting line marked with CC.
  • a cross connector 300 extends below the mast holder 202 from one wheel arm 104 to the other wheel arm 104'.
  • the cross connector 300 comprises an elongate connecting element 302, which can be a sheet metal part, for example, and rollers 304, 304 ′ arranged at opposite longitudinal ends of the connecting element 302. By means of the rollers 304, 304 ', the cross connector 300 engages behind the respective wheel arms 104, 104' in a clamped manner.
  • the roller 304 is in contact with a running surface 122 pointing outward from the mast holder 202 and the roller 304 'is in contact with a running surface 122' pointing outward from the mast holder 202, as in particular in the sectional views of FIG Figures 5c and 6th evident.
  • the rollers 304, 304' run along their respective running surfaces 122, 122 '.
  • the running surfaces 122, 122 ' form first bearing elements arranged on the wheel arms 104, 104', and the running rollers 304, 304 'form on the transverse connector 300 arranged second bearing elements.
  • the cross connector 300 is in engagement with the wheel arms 104, 104 ′ in such a way that the cross connector 300 limits a movement of the wheel arms 104, 104 ′ away from one another outward. This is achieved by engaging behind the wheel arms 104, 104 'by the respective rollers 304, 304' of the cross-connector 300 in a clamped manner.
  • the weight of the load is transferred via the side arms 204, 204 'of the load part 200 and their guide means to the wheel arms 104, 104'.
  • the cross connector 300 counteracts this spreading of the wheel arms 104, 104 '. By attacking the wheel arms directly, the cross connector holds the wheel arms together against the spreading forces, thus absorbing these forces.
  • the cross connector 300 is in engagement with the wheel arms 104, 104 'via the bearing elements 304, 304', 122, 122 'in such a way that the cross connector 300 can still be moved with respect to the wheel arms 104, 104'.
  • the transverse connector 300 is coupled in terms of movement to the mast holder 202 and is thus moved together with the mast holder 202 in relation to the wheel arms 104, 104 '. If the mast holder 202 is retracted or extended with respect to the drive frame 102, the transverse connector 300 moves accordingly.
  • the cross connector can always act where the forces spreading the wheel arms are greatest.
  • Figure 6 as in Figures 7a and 7b a first embodiment of a suspension is shown, with which the coupling between cross connector 300 and mast holder 202 can be achieved.
  • Figure 7a shows a sectional view along the cutting line AA off Figure 6 .
  • Figure 7b shows a labeled E detail of Figure 7a .
  • the hangers 306, 306 ' are each attached to their respective side arms 204, 204' by means of screws or bolts 308 ', only one bolt 308' being visible in the figures.
  • the cross connector 300 can also be suspended on a sub-floor 203 of the mast holder 202.
  • hangers 310' are connected to the sub-floor 203, for example via bolts or screws, wherein in Figure 8 only one of the hangers is recognizable.
  • the invention advantageously allows the wheel arms to be reliably stabilized over the entire length of the wheel arms.
  • the reach truck can move a load on a mast of the mast holder safely over its entire reach.

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  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Structural Engineering (AREA)
  • Civil Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Forklifts And Lifting Vehicles (AREA)

Claims (9)

  1. Chariot élévateur à mât rétractable avec une partie motrice (100) et une partie de charge (200), dans lequel
    - la partie motrice (100) comprend un cadre d'entraînement (102) avec deux bras à roue (104, 104') s'étendant parallèlement l'un à l'autre et un cadre de base (106) reliant les bras à roue (104, 104') l'un à l'autre, dans lequel un premier moyen de guidage (112, 112') est disposé respectivement sur les bras à roue (104, 104'),
    - la partie de charge (200) comprend un support de mât (202) avec deux bras latéraux (204, 204') s'étendant parallèlement l'un à l'autre et une traverse (206) reliant les bras latéraux (204, 204') l'un à l'autre, dans lequel un second moyen de guidage (212a, 212a') est disposé respectivement sur les bras latéraux (204, 204'),
    - les bras latéraux (204, 204') du support de mât (202) s'étendent parallèlement aux bras à roue (104, 104') du cadre d'entraînement (102), de sorte que respectivement l'un des bras latéraux (204, 204') s'étend de manière adjacente à l'un des bras à roue (104, 104'),
    - respectivement le premier moyen de guidage (112, 112') d'un bras à roue (104, 104') interagit avec le second moyen de guidage (212a, 212a') du bras latéral adjacent (204, 204'), de telle manière que le support de mât (202) est guidé de façon déplaçable sur les bras à roue (104, 104'),
    caractérisé en ce
    - qu'un raccord transversal (300) reliant les deux bras à roue (104, 104') l'un à l'autre et suspendu au support de mât (202) s'étend d'un bras à roue à l'autre bras à roue et est guidé conjointement avec le support de mât (202) de façon déplaçable sur les bras à roue (104, 104'), dans lequel le raccord transversal (300) est en prise avec les bras à roue (104, 104') au moyen d'éléments de palier (122, 122', 304, 304'), de telle manière que le raccord transversal (300) limite un mouvement des bras à roue (104, 104') les éloignant l'un de l'autre vers l'extérieur.
  2. Chariot élévateur à mât rétractable selon la revendication 1, caractérisé en ce que le raccord transversal (300) s'engage dans les bras à roue (104, 104') par l'arrière en s'y accrochant respectivement au moyen des éléments de palier (122, 122', 304, 304').
  3. Chariot élévateur à mât rétractable selon l'une des revendications précédentes, caractérisé en ce que les éléments de palier comprennent de premiers éléments de palier (122, 122') disposés sur les deux bras à roue (104, 104') et de seconds éléments de palier (304, 304') disposés aux extrémités opposées du raccord transversal, dans lequel respectivement l'un des premiers éléments de palier (120, 120') est en prise avec l'un des seconds éléments de palier (304, 304').
  4. Chariot élévateur à mât rétractable selon la revendication 3, caractérisé en ce que les premiers éléments de palier présentent respectivement une surface de roulement (122, 122') tournée vers l'extérieur et les seconds éléments de palier présentent respectivement au moins un élément de roulement (304, 304') longeant sur la surface de roulement (122, 122') respectivement adjacente ou que les seconds éléments de palier présentent respectivement une surface de roulement tournée vers l'intérieur et les premiers éléments de palier présentent respectivement au moins un élément de roulement longeant sur la surface de roulement respectivement adjacente.
  5. Chariot élévateur à mât rétractable selon la revendication 4, caractérisé en ce que les éléments de roulement présentent respectivement au moins un galet de roulement (304, 304') et / ou au moins une pièce coulissante.
  6. Chariot élévateur à mât rétractable selon la revendication 5, caractérisé en ce que les éléments de roulement présentent plusieurs galets de roulement et les axes de rotation des galets de roulement (304, 304') s'étendent à la perpendiculaire d'un sol portant le chariot élévateur à mât rétractable et parallèlement aux surfaces de roulement (122, 122') lors du fonctionnement du chariot élévateur à mât rétractable.
  7. Chariot élévateur à mât rétractable selon l'une des revendications précédentes, caractérisé en ce que les premiers moyens de guidage (112, 112') sont disposés respectivement sur les faces intérieures des bras à roue (104, 104') et les seconds moyens de guidage (212a, 212a') sont disposés respectivement sur les faces extérieures des bras latéraux (204, 204'), dans lequel la face intérieure respective d'un bras à roue (104, 104') est tournée vers la face extérieure respective du bras latéral adjacent (204, 204').
  8. Chariot élévateur à mât rétractable selon la revendication 7, caractérisé en ce que les premiers moyens de guidage présentent respectivement un rail de guidage (112, 112') et les seconds moyens de guidage présentent respectivement au moins un galet de guidage (212a, 212a'), dans lequel les galets de guidage (212a, 212a') du second moyen de guidage respectif sont guidés respectivement sur le rail de guidage adjacent (112, 112') du premier moyen de guidage.
  9. Chariot élévateur à mât rétractable selon la revendication 8, caractérisé en ce que les axes de rotation des galets de guidage (212a, 212a') s'étendent à l'horizontale par rapport à un sol portant le chariot élévateur à mât rétractable lors du fonctionnement du chariot élévateur à mât rétractable.
EP19154684.5A 2019-01-31 2019-01-31 Chariot élévateur à mât rétractable Active EP3689813B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP19154684.5A EP3689813B1 (fr) 2019-01-31 2019-01-31 Chariot élévateur à mât rétractable

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19154684.5A EP3689813B1 (fr) 2019-01-31 2019-01-31 Chariot élévateur à mât rétractable

Publications (2)

Publication Number Publication Date
EP3689813A1 EP3689813A1 (fr) 2020-08-05
EP3689813B1 true EP3689813B1 (fr) 2020-12-30

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Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT526006B1 (de) 2022-03-18 2024-07-15 Agilox Systems Gmbh Transporteinrichtung

Family Cites Families (8)

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Publication number Priority date Publication date Assignee Title
GB1299671A (en) * 1970-01-23 1972-12-13 Lancer Boss Ltd Improvements in or relating to side loaders
JPS5151861A (ja) * 1974-10-31 1976-05-07 Toyoda Automatic Loom Works Riichifuookurifutotoratsukuno nyakusochoriichiroora
JPS5980395U (ja) * 1982-11-24 1984-05-30 ティー・シー・エム株式会社 リ−チ型リフトトラツクのマスト取付装置
JPS59146397U (ja) * 1983-03-18 1984-09-29 小松フオ−クリフト株式会社 リ−チフオ−クリフトトラツクのリ−チレツグ
JP2507616Y2 (ja) * 1991-02-19 1996-08-14 小松フォークリフト株式会社 リ―チフォ―クリフトトラックのマストガイド装置
US5641261A (en) * 1993-10-18 1997-06-24 Taylor Iron-Machine Works, Inc. Fork lift truck
KR970038952U (ko) * 1995-12-30 1997-07-29 전동리치식 지게차의 마스트 흔들림 방지장치
JP2004075303A (ja) * 2002-08-20 2004-03-11 Komatsu Forklift Co Ltd リーチフォークリフトにおけるリーチローラ

Non-Patent Citations (1)

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Title
None *

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