EP2322465B1 - Lasthebesystem - Google Patents

Lasthebesystem Download PDF

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Publication number
EP2322465B1
EP2322465B1 EP09175971A EP09175971A EP2322465B1 EP 2322465 B1 EP2322465 B1 EP 2322465B1 EP 09175971 A EP09175971 A EP 09175971A EP 09175971 A EP09175971 A EP 09175971A EP 2322465 B1 EP2322465 B1 EP 2322465B1
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EP
European Patent Office
Prior art keywords
displaceable
shim
stub shaft
load
lifting system
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
EP09175971A
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English (en)
French (fr)
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EP2322465A1 (de
Inventor
Thomas Linder
Torben Nielsen
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.)
Atlet AB
Original Assignee
Atlet AB
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Filing date
Publication date
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Priority to EP09175971A priority Critical patent/EP2322465B1/de
Publication of EP2322465A1 publication Critical patent/EP2322465A1/de
Application granted granted Critical
Publication of EP2322465B1 publication Critical patent/EP2322465B1/de
Active legal-status Critical Current
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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
    • B66F9/08—Masts; Guides; Chains
    • 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
    • B66F9/085—Multiple forks, i.e. more than one pair mounted on a single mast or with more than one mast

Definitions

  • the present invention relates to a load-lifting system.
  • the present invention also relates to a method for adjusting a load-lifting system.
  • a guide means arranged between the two displaceable parts.
  • industrial trucks conventionally comprises a load-lifting system, such as mast uprights that are displaceable in relation to each other.
  • the guide means between the displaceable parts of an industrial truck is subject to wearing and therefore, or for adjustment or readjustment due to for example variations in construction, the system must be adjusted periodically. Shims are conventionally used for such adjustments. Shims are added and/or removed depending on the type of adjustment.
  • US 4 354 579 teaches an apparatus for guiding lift truck mast segments, comprising a guide roller arranged between two mast segments that are displaceable in relation to each other.
  • the proposed solution in US 4 354 579 is to provide an arrangement wherein inter alia a stub shaft is arranged on a plate which is fastened by fasteners.
  • a general object of the present invention is to provide an improved load-lifting system. This and other objects are achieved through a load-lifting system, and a method for adjusting a load-lifting system according to the appended claims.
  • a load-lifting system comprising a first and a second part that are displaceable in relation to each other by means of a guide roller arrangement comprising a stub shaft arranged on the second part; a roller bearing mounted on the stub shaft, the roller bearing comprising an outer rotatable bearing element forming a guide roller, arranged to be in contact with a channel in the first part; and at least one displaceable shim, arranged on the stub shaft between the second part and the roller bearing, for displacing the roller bearing laterally relative the second part, the displaceable shim being radially insertable to the stub shaft, to partially surround the stub shaft.
  • the first and second part may be any parts of a load-lifting system that are displaceable in relation to each other, such as uprights, horizontal reach movements, or tilted upright movements.
  • roller bearing may mean any object comprising a rotatable surface to be arranged in contact with a displaceable part.
  • a roller bearing may be a conventional ball or roller bearing comprising an inner and outer race and a set of balls or cylinders arranged therebetween, whereby two parts, such as the stub shaft and the second part of the load-lifting system, may be moved in relation to each other with very little resistance.
  • laterally displacing means displacement in the axial direction of the stub shaft.
  • radially insertable means that the displaceable shim is insertable to the stub shaft across the axial direction of the stub shaft.
  • the present invention is based on the understanding that adjustment of the load-lifting system, such as for compensating for variations in construction, or wear factors, may be made by adding or removing shims to or from the stub shaft. Further, the displaceable shims are radially insertable to the shaft, with the result that a shim may be added, or removed without disassembly of any parts of the load-lifting system. In the case that a displaceable shim is to be added, it may simply be snapped on to the stub shaft. If a displaceable shim is to be removed it is pulled from its place on the stub shaft. That is, the steps of execution for adjusting the load-lifting system are reduced and simplified in comparison to prior art.
  • an optimal play between the two parts that are displaceable in relation to each other may be obtained in an easy manner. Since the system do not have to be disassembled when adding or removing a displaceable shim the play may be adjusted frequently and as soon as needed for obtaining an optimal friction and a sufficient gap between the parts of the system, which otherwise would tend to be left unchanged if the play is operational but not optimal. Hence, a system with a higher quality and performance may be obtained with the solution of the present invention.
  • the displaceable shim may inwardly form an open ring.
  • the inward shape does however not control the outer form of the displaceable shim.
  • the displaceable shim as previously mentioned, provide a simple and cost-effective handling. Especially adjustments by means of the displaceable shim is rendered cheap and easy..
  • the outer circumference of the displaceable shim may correspond to the inward form of a ring like traditional shims.
  • alternative shapes of the outer circumference such as oblique, triangular or square, may be possible or even advantageous. Certain shapes of the outer circumference may for example facilitate gripping of the displaceable shim.
  • an opening of said displaceable shim may be smaller than a diameter of said stub shaft, whereby the displaceable shim may be snapped on to the stub shaft, and be securely arranged on the shaft without falling off.
  • a first displaceable shim and a second displaceable shim may be joined by a joint, and the two displaceable shims may be arranged on different sides of the stub shaft, by closing the two displaceable shim arrangement by means of the joint.
  • Two displaceable shims may also be joined by means of for example barbs or Velcro tape. These arrangement may especially be advantageous with an increased displaceable shim thickness.
  • the opening size may depend on for example the material of the displaceable shim.
  • the displaceable shim may be made of a resilient material, preferably spring steel. By using a resilient material the displaceable shim may be easily snapped on to the stub shaft.
  • the opening size may moreover be made smaller with a resilient material, yet return to the original shape after insertion to the shaft, whereby the displaceable shim may be fixedly arranged on the stub shaft.
  • Another example of material is plastic.
  • the displaceable shim may have a thickness in the range between 0.05 and 2 mm, and preferably between 0.2 and 1 mm, and most preferably the thickness may be about 0.5 mm.
  • a shim may be made having a thickness that compensate for for example variations in construction by itself, or a plurality of shims may be arranged on the shaft to together compensate for such or other factors.
  • the displaceable shim may have a larger thickness, such as 5 millimeters or more. In this way the displaceable shim may form also the basic shim arrangement on the stub shaft.
  • a thicker displaceable shim may for example be advantageous if the displaceable shim is made of a light material, such as plastic.
  • Such thicker shims may be used in the same way as discussed in the foregoing, where simple adjustments are rendered possible by e.g. exchanging a first shim with a slightly thicker or slightly narrower second shim. Accordingly, a set of shims with small thickness increments may be used to obtain the intended thickness for any particular situation.
  • the displaceable shim may comprise an operatingmeans, the operating means preferably protruding away from said direction of insertion for facilitating insertion and/or removal of the displaceable shim.
  • the operating means may be a flat ear, or have alternative shapes, depending on what tool to be used when inserting or removing the displaceable shim.
  • the operating means may be integrated to the displaceable shim, or a detached part that may be fastened to the shim when needed.
  • pliers may be used to keep the operating means during insertion or removal of the displaceable shim.
  • the operating means may protrude in a direction such that the operating means may be passed over the stub shaft before the displaceable shim.
  • the operating means may be formed as two protruding parts that may be pulled over the stub shaft to thereby arrange the displaceable shim on the stub shaft.
  • the operating means may comprise an aperture.
  • An aperture may further facilitate especially removal of the operating shim, by allowing a hook to be inserted to the aperture before pulling.
  • the aperture may be used for attaching a displaceable shim to the stub shaft by means of for example inserting a screw to the aperture. Attachment through the aperture may be used as the only means of attachment or as a complementary attachment depending on the form of the displaceable shim.
  • a method for adjusting a load-lifting system comprising a first and a second part that are displaceable in relation to each other by means of a guide roller arrangement comprising a stub shaft arranged on the second part; a roller bearing mounted on the stub shaft, the roller bearing comprising an outer rotatable bearing element forming a guide roller, arranged to be in contact with a channel in the first part; and at least one displaceable shim, arranged on the stub shaft between the second part and the roller bearing, for displacing the roller bearing laterally relative the second part, the displaceable shim being radially insertable to the stub shaft, to partially surround the stub shaft, the method comprising the steps of:
  • the present invention facilitates adjusting of a load-lifting system by allowing exchange, addition or removal of a displaceable shim with only a few execution steps. For example, if inserting a displaceable shim, only two steps are necessary, none of the steps requiring disassembling of the load-lifting system. There is for example no need to remove or add fasteners when adjusting the system.
  • the method is advantageous since it saves time and with that also money.
  • the method moreover renders adjusting of the system simplified, and it may therefore be performed by individuals without any specific skills. It is advantageous that the system may be adjusted by the users of the system and not only the manufacturer or experts, since especially wear factors but also variations in construction may appear after shorter or longer usage of the load-lifting system in the industry.
  • an industrial truck comprising the load-lifting system.
  • An industrial truck may comprise several load-lifting systems, whereby improved simplified adjustment of such systems is advantageous.
  • first upright 1 a is stationary, whereas the second upright 1 b is axially displaceable in relation to the first upright 1 a, and the third upright 1 c is axially displaceable in relation to the second upright 1 b.
  • At least the first 1 a and second 1 b upright forms a channel in the longitudinal direction, the channel opening of the first upright 1 a being directed toward the second upright 1 b, and the channel opening of the second upright 1 b being directed toward the third upright 1 c.
  • the second 1 b and third 1 c uprights have I-beam and/or U-beam cross-sections for supporting the arrangement against the neighbouring upright.
  • a guide roller 20a is arranged in the channel 2a of the first upright 1 a between the first and second upright, and another guide roller 20b is arranged in the channel 2b of the second upright 1 b between the second 1 b and third 1 c upright, respectively.
  • the guide roller arrangement 20 is described in more detail in relation to fig. 2 .
  • the three uprights are arranged essentially in parallel, side by side, the channel of each upright facing the corresponding neighboring upright.
  • the second upright 1 b is axially displaced in relation to the first upright 1 a by means of the guide roller arrangement 20a which is arranged therebetween.
  • the third upright 1 c is axially displaced in relation to the second upright 1 b by means of the guide roller arrangement 20b which is arranged therebetween.
  • the following description will relate mainly to two uprights, the first 1 a and the second 1 b upright and the corresponding guide roller arrangement 20a.
  • the guide roller arrangement 20 comprises a stub shaft 21, which extends horizontally between neighboring uprights, such as between the second 1 b and first 1 a upright.
  • a roller bearing 22 comprises an outer rotatable element forming a guide roller 22a and an inner element 22b that is arranged on the stub shaft 21.
  • a displaceable shim 23 is arranged on the stub shaft 21 between the closed shim 24 and the second upright 1 b.
  • the displaceable shim 23 is here formed as an open ring, like a c-shape.
  • the diameter of the opening 27 is slightly smaller than the diameter of the stub shaft 21.
  • the displaceable shim 23 further comprises an operating means 25, here in form of a flat ear with an aperture 26.
  • the displaceable shim 23 is preferably made of a resilient material, such as spring steel that return to the original shape after bending.
  • the guide roller 22a of the roller bearing 22 arranged in contact with the channel 2a of the first upright 1 a in which the guide roller 20a is arranged, rotates as the displaceable second upright 1 b is axially displaced in relation to the stationary first upright 1 a.
  • Variations in construction may be seen in an early phase, which variations need to be compensated for, often already at the manufacturing site. Later on, adjustments must be made due to wearing of the load-lifting system.
  • the play between the first 1 a and second 1 b uprights may be adjusted when required for an optimal play.
  • the closed shim is mounted to the guide roller arrangement 20 already in the construction phase.
  • the displaceable shim however may be mounted thereafter to for example compensate for mentioned variations in construction, or for wearing factors of for example the guide roller 22 or beam profile during use of the system.
  • displaceable shims 23 are arranged to the guide roller arrangement 20 from the beginning.
  • a displaceable shim 23 may however be easily arranged on the stub shaft 21 also after assemblement of the complete system by snapping it over the stub shaft 21.
  • a tool may be used to grip the protruding operating means 25 to facilitate insertion, while a hook may be inserted in the aperture 26 of the operating means 25 to facilitate removal of the displaceable shim 23 when needed, for example for exchangment of an already inserted displaceable shim 23.
  • the fact that the displaceable shim 23 is inwardly ring formed and has an opening renders it easy to remove from or add to the stub shaft 21, especially since a resilient material is used.
  • Fig. 3 illustrates an example of a displaceable shim 23.
  • the displaceable shim is c-shaped, inwardly 28 and outwardly 29 forming a ring.
  • the diameter of the opening 27 is made slightly smaller than the diameter of the stub shaft onto which the displaceable shim 23 is to be arranged.
  • a operating means 25, here in the form of a flat ear is integrated to the displaceable shim, which ear comprises a round aperture adapted to receive a hook which may simplify especially removal of the displaceable shim 23.
  • Such a displaceable shim 23 may be used in any system where it may be inserted to a stub shaft.
  • Fig. 4 illustrates an example of a load-lifting system of the present invention.
  • the load-lifting system is here an industrial fork-lift truck 30 comprising three pairs of uprights 1 a-c that forms a frame that is telescopically displaceable.
  • the first pair 1 a is stationary.
  • the second pair 1 b is axially displaceable in relation to the first stationary pair 1 a, and the third pair 1 c in relation to the second pair 1 b, respectively.
  • a fork carriage 31 is arranged on the third upright 1c, and is axially displacable along the third upright 1 c, from bottom to top.
  • the fork carriage 31 may be elevated along with telescopical displacement of the uprights 1 a-c from the bottom of the truck 30 to the top, where full extension is reached, to for example lift a load arranged thereon.
  • the fork carriage 31 is free lifted along the third upright 1 c, and thereafter, the second 1 b and third 1 c uprights are simultaneously displaced in the axial direction. Likewise, the uprights can return to the initial position from the most extended position to lower the fork carriage 31 again.
  • the displaceable shim may have various open forms, for example square or oblique, with and without operating means and be made of various materials, such as plastic.
  • the guide roller may have various forms, such as oval or ball formed, and there are other types of load-lifting systems, such that stationary load-lifting systems, etc.

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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 (8)

  1. Lastehebesystem (10), umfassend einen ersten (1 a) und einen zweiten (1 b) Teil, die durch eine Führungsrollenanordnung (20) in Bezug zueinander verschiebbar sind, welche Folgendes umfasst:
    einen Wellenstumpf (21), der an dem zweiten Teil (1 b) angeordnet ist;
    ein Rollenlager (22), das an dem Wellenstumpf angebracht ist, wobei das Rollenlager ein äußeres drehbares Lagerelement (22a) umfasst, das eine Führungsrolle bildet, die für einen Kontakt mit einem Kanal (2a) in dem ersten Teil (1 a) eingerichtet ist;
    dadurch gekennzeichnet, dass es wenigstens eine verschiebbare Abstandsscheibe (23) umfasst, die an dem Wellenstumpf (21) zwischen dem zweiten Teil (1 b) und dem Rollenlager (22) angeordnet ist, um das Rollenlager (22) seitlich in Bezug auf den zweiten Teil (1 b) zu verschieben, wobei die verschiebbare Abstandsscheibe (23) radial in den Wellenstumpf (21) einsetzbar ist, so dass sie den Wellenstumpf (21) teilweise umgibt.
  2. Lasthebesystem nach Anspruch 1, wobei die verschiebbare Abstandsscheibe (23) im Inneren einen offenen Ring bildet.
  3. Lasthebesystem nach einem der vorhergehenden Ansprüche, wobei eine Öffnung der verschiebbaren Abstandsscheibe (23) kleiner als ein Durchmesser des Wellenstumpfs (21) ist.
  4. Lasthebesystem nach einem der vorhergehenden Ansprüche, wobei die verschiebbare Abstandsscheibe (23) aus einem elastischen Material, vorzugsweise Federstahl, besteht.
  5. Lasthebesystem nach einem der vorhergehenden Ansprüche, wobei die verschiebbare Abstandsscheibe (23) eine Dicke im Bereich zwischen 0,05 und 2 mm, vorzusweise im Bereich zwischen 0,2 und 1 mm und insbesondere von etwa 0,5 mm aufweist.
  6. Lasthebesystem nach einem der vorhergehenden Ansprüche, wobei die verschiebbare Abstandsscheibe (23) ein Betätigungsmittel (25) umfasst, wobei das Betätigungsmittel (25) vorzugsweise von der Einsetzrichtung weg vorspringt.
  7. Lasthebesystem nach Anspruch 6, wobei das Betätigungsmittel (25) eine Öffnung (26) umfasst.
  8. Verfahren zur Einstellung eines Lasthebesystems (10), umfassend einen ersten (1 a) und einen zweiten (1 b) Teil, die durch eine Führungsrollenanordnung (20) in Bezug zueinander verschiebbar sind, welche Folgendes umfasst:
    einen Wellenstumpf (21), der an dem zweiten Teil (1 b) angeordnet ist;
    ein Rollenlager (22), das an dem Wellenstumpf (21) angebracht ist, wobei das Rollenlager (22) ein äußeres drehbares Lagerelement (22a) umfasst, das eine Führungsrolle bildet, die für einen Kontakt mit einem Kanal (2a) in dem ersten Teil (1 a) eingerichtet ist; und
    wenigstens eine verschiebbare Abstandsscheibe (23), die an dem Wellenstumpf (21) zwischen dem zweiten Teil (1 b) und dem Rollenlager (22) angeordnet ist, um das Rollenlager (22) seitlich in Bezug auf den zweiten Teil (1 b) zu verschieben, wobei die verschiebbare Abstandsscheibe (23) radial in den Wellenstumpf (21) einsetzbar ist, so dass sie den Wellenstumpf (21) teilweise umgibt, wobei das Verfahren die folgenden Schritte umfasst:
    Trennen des ersten (1 a) und des zweiten Teils (1 b), ohne das Lasthebesystem zu zerlegen; und
    radiales Einsetzen der verschiebbaren Abstandsscheibe (23) in den Wellenstumpf (21) zwischen dem ersten (1 a) und dem zweiten (1 b) Teil.
EP09175971A 2009-11-13 2009-11-13 Lasthebesystem Active EP2322465B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP09175971A EP2322465B1 (de) 2009-11-13 2009-11-13 Lasthebesystem

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP09175971A EP2322465B1 (de) 2009-11-13 2009-11-13 Lasthebesystem

Publications (2)

Publication Number Publication Date
EP2322465A1 EP2322465A1 (de) 2011-05-18
EP2322465B1 true EP2322465B1 (de) 2013-02-27

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Application Number Title Priority Date Filing Date
EP09175971A Active EP2322465B1 (de) 2009-11-13 2009-11-13 Lasthebesystem

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Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104803326B (zh) * 2015-05-13 2017-10-13 意欧斯智能科技股份有限公司 一种双托盘叉车

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4060301A (en) * 1974-03-12 1977-11-29 Beatty Albert W Electrical connector for transmission line insulators
US5316061A (en) * 1993-03-16 1994-05-31 Lee Leonard G Shims for dado cutter set
EP1308382A2 (de) * 2001-10-26 2003-05-07 Shimano Inc. Zwischenstück und Fahrrad mit Zwischenstück
DE102004051604A1 (de) * 2004-10-23 2006-05-04 Brückl-Gesellschaft für Befestigungssysteme mbH Spreizdübel

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB640914A (en) * 1946-02-18 1950-08-02 Angelo Boeris A device for quickly fitting and removing wheels of racing and sports bicycles
US2643162A (en) * 1950-08-01 1953-06-23 Roller Bearing Company Antifriction carriage roller
US3556247A (en) * 1967-11-07 1971-01-19 Toyoda Automatic Loom Works Lift truck
GB1243667A (en) * 1968-08-30 1971-08-25 Lansing Bagnall Ltd Improvements in or relating to industrial lift trucks and to roller assemblies for use therein
GB1528558A (en) * 1976-07-09 1978-10-11 Towmotor Corp Lift truck mast
US4354579A (en) 1980-06-30 1982-10-19 Low Leonard J Apparatus for guiding lift truck mast segments
DE102004042335A1 (de) * 2004-09-01 2006-03-02 Jungheinrich Ag Flurförderzeug mit Gleitführung in der Lastverlagerungsvorrichtung

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4060301A (en) * 1974-03-12 1977-11-29 Beatty Albert W Electrical connector for transmission line insulators
US5316061A (en) * 1993-03-16 1994-05-31 Lee Leonard G Shims for dado cutter set
EP1308382A2 (de) * 2001-10-26 2003-05-07 Shimano Inc. Zwischenstück und Fahrrad mit Zwischenstück
DE102004051604A1 (de) * 2004-10-23 2006-05-04 Brückl-Gesellschaft für Befestigungssysteme mbH Spreizdübel

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