EP4334234B1 - Dispositif de levage, unité de levage et véhicule de transport - Google Patents

Dispositif de levage, unité de levage et véhicule de transport

Info

Publication number
EP4334234B1
EP4334234B1 EP22721409.5A EP22721409A EP4334234B1 EP 4334234 B1 EP4334234 B1 EP 4334234B1 EP 22721409 A EP22721409 A EP 22721409A EP 4334234 B1 EP4334234 B1 EP 4334234B1
Authority
EP
European Patent Office
Prior art keywords
lifting
spindle nut
spindle
outer spindle
lifting device
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
EP22721409.5A
Other languages
German (de)
English (en)
Other versions
EP4334234C0 (fr
EP4334234A1 (fr
Inventor
Dirk Degen
Marc HAMMER
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.)
SEW Eurodrive GmbH and Co KG
Original Assignee
SEW Eurodrive GmbH and Co KG
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 SEW Eurodrive GmbH and Co KG filed Critical SEW Eurodrive GmbH and Co KG
Publication of EP4334234A1 publication Critical patent/EP4334234A1/fr
Application granted granted Critical
Publication of EP4334234C0 publication Critical patent/EP4334234C0/fr
Publication of EP4334234B1 publication Critical patent/EP4334234B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • B66F3/00—Devices, e.g. jacks, adapted for uninterrupted lifting of loads
    • B66F3/08—Devices, e.g. jacks, adapted for uninterrupted lifting of loads screw operated
    • B66F3/10—Devices, e.g. jacks, adapted for uninterrupted lifting of loads screw operated with telescopic sleeves
    • 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
    • B66F3/00—Devices, e.g. jacks, adapted for uninterrupted lifting of loads
    • B66F3/46—Combinations of several jacks with means for interrelating lifting or lowering movements
    • 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
    • B66F9/063—Automatically guided

Definitions

  • the invention relates to a lifting device, in particular for a transport vehicle, comprising a spindle and a spindle nut.
  • the invention also relates to a lifting unit, in particular for a transport vehicle, comprising a plurality of lifting devices according to the invention.
  • the invention further relates to a transport vehicle, in particular an automated guided vehicle (AGV).
  • AGV automated guided vehicle
  • a driverless transport vehicle is a well-known type of automated guided vehicle (AGV).
  • AGVs are used in technical facilities, such as production plants, to transport objects, for example, small parts or boxes. These mobile transport vehicles move components from logistics areas, such as a material warehouse, to workstations where the components are processed. For lifting and lowering the objects being transported, the AGV has a height-adjustable platform.
  • the lifting unit comprises a scissor lift table which can be driven by a motor via a rotatable spindle and a spindle nut.
  • a lifting device which has several concentrically arranged spindles and spindle nuts. By rotating the spindles relative to each other, the lifting device expands in the axial direction.
  • a lifting device which comprises a stationary spindle, an inner spindle nut which is rotatable relative to the stationary spindle, a movable spindle and an outer spindle nut which is rotatable relative to the movable spindle.
  • a vehicle which has several lifting devices.
  • the invention is based on the objective of further developing a lifting device, in particular for a transport vehicle, a lifting unit, in particular for a transport vehicle, and a transport vehicle, in particular a driverless transport vehicle.
  • the object of the invention is achieved by a lifting device having the features specified in claim 1.
  • Advantageous embodiments and further developments are the subject of the dependent claims.
  • the object is further achieved by a lifting unit having the features specified in claim 8.
  • Advantageous embodiments and further developments are the subject of the dependent claims.
  • the object is also achieved by a transport vehicle having the features specified in claim 11.
  • Advantageous embodiments and further developments are the subject of the dependent claims.
  • a lifting device particularly for a transport vehicle, comprises an inner spindle, an inner spindle nut rotatable relative to the inner spindle, an outer spindle, and an outer spindle nut rotatable relative to the outer spindle.
  • the inner spindle nut is connected to the outer spindle nut in a rotationally fixed, and in particular rigid, manner.
  • the lifting device is robust and reliable. It comprises two threads, allowing for a greater stroke with the same number of revolutions.
  • the lifting device has a relatively small axial dimension and is therefore particularly suitable for use on an automated guided vehicle (AGV).
  • AGV automated guided vehicle
  • the inner spindle nut is arranged coaxially within the outer spindle.
  • the inner spindle nut and the outer spindle are arranged concentrically to a central axis, which defines the axial direction. This advantageously minimizes the radial extension of the lifting device.
  • the outer spindle is rotationally fixed to the inner spindle.
  • a torque transmitted through the inner spindle nut and the outer spindle nut can be absorbed.
  • the outer spindle is mounted to be movable in the axial direction relative to the inner spindle. This allows movement of the outer spindle relative to the inner spindle in the axial direction, which is referred to as stroke.
  • the inner spindle nut and/or the outer spindle nut each have an internal thread in the form of a trapezoidal thread. Trapezoidal threads have proven to be particularly advantageous.
  • the inner spindle nut has a first internal thread with a first orientation
  • the outer spindle nut has a second internal thread with a second orientation.
  • the first and second orientations are opposite to each other. If the inner spindle and the inner spindle nut are designed with a right-hand thread, then the outer spindle and the outer spindle nut are designed with a left-hand thread, and vice versa. This results in the stroke movements of the inner spindle and the outer spindle nut being additive when the inner spindle and the outer spindle are rotated relative to the inner spindle nut and the outer spindle nut, respectively.
  • the outer spindle nut comprises external teeth.
  • the external teeth serve in particular for the rotary drive of the outer spindle nut relative to the outer spindle by means of a toothed belt.
  • a lifting unit according to the invention particularly for a transport vehicle, comprises a plurality of lifting devices according to the invention, an electric motor, a drive wheel and a drive belt, wherein the electric motor drives the drive belt via the drive wheel, and wherein the drive belt rotates the outer spindle nuts of the lifting devices relative to the outer spindles.
  • the lifting devices are arranged parallel and offset from one another.
  • the lifting unit allows the lifting unit to absorb relatively large lateral loads and resulting moments without risking buckling of the spindles or spindle nuts of the lifting devices.
  • AGV automated guided vehicle
  • the drive belt is designed as a toothed belt and meshes with external teeth on the outer spindle nuts of the lifting devices.
  • Such a design is relatively cost-effective and guarantees a uniform drive for all lifting devices.
  • the lifting unit comprises a support plate which is rotationally fixed, in particular rigidly connected, to the inner spindles of the lifting devices.
  • the support plate serves in particular to accommodate loads. Furthermore, the support plate prevents rotation of the inner spindles relative to the support plate and relative to the outer spindles.
  • a transport vehicle in particular a driverless transport vehicle, comprises a drive device, an electrical energy storage device for supplying the drive device, a control device for controlling the drive device, and at least one lifting device and/or at least one lifting unit according to the invention.
  • the driverless transport vehicle also includes a lifting sensor for detecting a lift, i.e., a movement of the outer spindles relative to the inner spindles in the axial direction, of the at least one lifting device and/or the at least one lifting unit according to the invention.
  • Figure 1 shows a top view of a lifting unit 50.
  • the lifting unit 50 comprises several, in this case four, lifting devices 10.
  • Each of the lifting devices 10 comprises an inner spindle 4, an inner spindle nut 5, which is rotatable relative to the inner spindle 4, an outer spindle 6, and an outer spindle nut 7, which is rotatable relative to the outer spindle 6.
  • the inner spindle nut 5 has a flange 8, which in this illustration conceals the outer spindle 6, the outer spindle nut 7, and the remainder of the inner spindle nut 5.
  • the inner spindle 4, the inner spindle nut 5, the outer spindle 6, the outer spindle nut 7, and the flange 8 of a lifting device 10 are each designed to be at least approximately rotationally symmetrical and arranged concentrically to a central axis M.
  • the inner spindle 4 is arranged coaxially in the inner spindle nut 5.
  • the inner spindle nut 5 is arranged coaxially in the outer spindle 6.
  • the outer spindle 6 is arranged coaxially in the outer spindle nut 7.
  • the lifting devices 10 of the lifting unit 50 are each rigidly connected to a separate base plate 35 of an automated guided vehicle (AGV). Alternatively, the lifting devices 10 can be connected to a common base plate 35 of the AGV.
  • the lifting devices 10 are arranged parallel to each other. The central axes M of the lifting devices 10 are therefore parallel to each other and each defines an axial direction.
  • the outer spindle nuts 7 of the lifting devices 10 each include an external toothing 27.
  • the lifting unit 50 comprises an electric motor 28, a drive wheel 29, and a drive belt 40.
  • the electric motor 28 drives the drive belt 40 via the drive wheel 29.
  • the drive belt 40 is designed as a toothed belt and meshes with the external teeth 27 of the outer spindle nuts 7 of the lifting devices 10.
  • the lifting unit 50 also includes a plurality of rollers 42, which guide the drive belt 40.
  • the outer spindle nuts 7 of the lifting devices 10 are driven rotationally by the drive belt 40. In this process, the outer spindle nuts 7 of the lifting devices 10 are rotated relative to the outer spindles 6 about the respective central axis M of the lifting devices 10.
  • FIG 2 shows a sectional view of the lifting unit 50 along the section line AA in Figure 1 in the retracted position. Two of the four lifting devices 10 are thus visible.
  • the lifting unit 50 comprises a support plate (not shown here) which is rotationally fixed, in particular rigidly connected, to the inner spindles 4 of the lifting devices 10.
  • the support plate serves in particular as a load-bearing element.
  • the lifting devices 10 are identical in this case. Reference will be made below to one of the aforementioned lifting devices 10.
  • the outer spindle 6 of the lifting device 10 is rigidly connected to the base plate 35 of the automated guided vehicle by means of several screws 30.
  • the inner spindle 4 is screwed to the inner spindle nut 5 via a trapezoidal thread. Other thread types are also conceivable here.
  • the outer spindle nut 7 is screwed to the outer spindle 6 via a trapezoidal thread. Other thread types are also conceivable here.
  • the flange 8 of the inner spindle nut 5 is rigidly connected to the outer spindle nut 7 by means of several screws 30.
  • the inner spindle nut 5 is thus rotationally fixed to the outer spindle nut 7, in particular rigidly.
  • the inner spindle 4 is rotationally fixed to the base plate 35 of the automated guided vehicle.
  • the inner spindle 4 is oriented relative to the base plate 35 of the automated guided vehicle.
  • the transport vehicle is mounted so that it can move axially.
  • the inner spindle 4 is rotationally fixed to the outer spindle 6 and is mounted so that it can move axially relative to the outer spindle 6.
  • the lifting device 10 is extended by a rotary drive of the outer spindle nut 7 relative to the outer spindle 6 via the drive belt 40.
  • Other types of drive are also conceivable, which generate a rotary movement of the outer spindle nut 7 relative to the outer spindle 6.
  • the movement of the drive belt 40 causes the outer spindle nut 7 to be driven rotationally via the external teeth 27. Due to the threads of the outer spindle nut 7 and the outer spindle 6, this rotation generates a translational movement of the outer spindle nut 7 relative to the outer spindle 6 in the axial direction. Since the outer spindle nut 7 is rigidly connected to the inner spindle nut 5, this also results in a translational movement of the inner spindle nut 5 relative to the outer spindle 6 in the axial direction.
  • the inner spindle nut 5 rotates relative to the inner spindle 4. Due to the thread of the inner spindle nut 5 and the inner spindle 4, a translational movement of the inner spindle nut 5 relative to the inner spindle 6 occurs in the axial direction.
  • FIG 3 shows a sectional view of the lifting unit 50 along the section line AA in Figure 1 in the extended position. Two of the four lifting devices 10 are thus visible. As already mentioned, the lifting devices 10 are identical in this case. The following refers to one of these lifting devices 10.
  • the inner spindle nut 5 has a first internal thread 15 in the form of a trapezoidal thread.
  • the inner spindle 4 has a corresponding external thread in the form of a trapezoidal thread.
  • the outer spindle nut 7 has a second internal thread 17 in the form of a trapezoidal thread.
  • the outer spindle 6 has a corresponding external thread in the form of a trapezoidal thread.
  • the first internal thread 15 of the inner spindle nut 5 has a first orientation; in this case, the first internal thread 15 is designed as a right-hand thread.
  • the second internal thread 17 of the outer spindle nut 7 has a second orientation; in this case, The second internal thread 17 is designed as a left-hand thread.
  • the first and second orientations are therefore opposite to each other.
  • Figure 4 Figure 1 shows a perspective view of the lifting unit 50 in its retracted position.
  • the electric motor 28 is rigidly connected to the driverless transport vehicle and is therefore fixed in position relative to the base plates 35.
  • the drive wheel 29 and the rollers 42 are rotatable relative to the base plates 35, but are also fixed in position relative to them.
  • the drive belt 40 is arranged at a constant axial distance from the base plates 35. In the retracted state shown here, the drive belt 40 is located at an axial end of the outer spindle nuts 7 of the lifting devices 10, facing away from the base plates 35.
  • Figure 5 shows a perspective view of the lifting unit 50 in the extended state.
  • the drive belt 40 is located at an axial end of the outer spindle nuts 7 of the lifting devices 10, facing the base plates 35.

Landscapes

  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Transportation (AREA)
  • Civil Engineering (AREA)
  • Transmission Devices (AREA)

Claims (12)

  1. Dispositif de levage (10), en particulier pour un véhicule de transport, comprenant
    une broche intérieure (4),
    un écrou de broche intérieur (5) pouvant tourner par rapport à la broche intérieure (4), une broche extérieure (6) et
    un écrou de broche extérieur (7) pouvant tourner par rapport à la broche extérieure (6),
    caractérisé en ce que
    l'écrou de broche intérieur (5) est relié de manière solidaire en rotation, en particulier de manière rigide, à l'écrou de broche extérieur (7).
  2. Dispositif de levage (10) selon la revendication 1, caractérisé en ce que
    l'écrou de broche intérieur (5) est agencé de manière coaxiale dans la broche extérieure (6).
  3. Dispositif de levage (10) selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    la broche extérieure (6) est couplée de manière solidaire en rotation avec la broche intérieure (4).
  4. Dispositif de levage (10) selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    la broche extérieure (6) est montée mobile dans la direction axiale par rapport à la broche intérieure (4).
  5. Dispositif de levage (10) selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    l'écrou de broche intérieur (5) et/ou l'écrou de broche extérieur (7) présentent respectivement un filetage intérieur (15, 17) sous la forme d'un filetage trapézoïdal.
  6. Dispositif de levage (10) selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    l'écrou de broche intérieur (5) présente un premier filetage intérieur (15) avec une première orientation, et en ce que
    l'écrou de broche extérieur (7) présente un deuxième filetage intérieur (17) avec une deuxième orientation,
    la première orientation et la deuxième orientation étant opposées l'une à l'autre.
  7. Dispositif de levage (10) selon l'une quelconque des revendications précédentes, caractérisé en ce que l'écrou de broche extérieur (7) comprend une denture extérieure (27).
  8. Unité de levage (50), en particulier pour un véhicule de transport, comprenant
    une pluralité de dispositifs de levage (10) selon l'une quelconque des revendications précédentes,
    un moteur électrique (28), une roue d'entraînement (29) et une courroie d'entraînement (40),
    le moteur électrique (28) entraînant la courroie d'entraînement (40) par l'intermédiaire de la roue d'entraînement (29), et
    la courroie d'entraînement (40) entraînant les écrous de broche extérieurs (7) des dispositifs de levage (10) en rotation par rapport aux broches extérieures (6).
  9. Unité de levage (50) selon la revendication 8, caractérisée en ce que
    la courroie d'entraînement (40) est réalisée sous la forme d'une courroie crantée et s'engrène avec respectivement une denture extérieure (27) des écrous de broche extérieurs (7) des dispositifs de levage (10).
  10. Unité de levage (50) selon l'une quelconque des revendications 8 à 9, caractérisée en ce que
    l'unité de levage (50) comprend une plaque de support qui est reliée de manière solidaire en rotation, en particulier de manière rigide, aux broches intérieures (4) des dispositifs de levage (10).
  11. Véhicule de transport, en particulier véhicule de transport sans conducteur, comprenant un dispositif d'entraînement, un accumulateur d'énergie électrique permettant d'alimenter le dispositif d'entraînement et un dispositif de commande permettant de commander le dispositif d'entraînement, ainsi qu'au moins un dispositif de levage (10) et/ou au moins une unité de levage (50) selon l'une quelconque des revendications précédentes.
  12. Véhicule de transport selon la revendication 11, comprenant en outre
    un capteur de levage permettant de détecter un levage du au moins un dispositif de levage (10) et/ou de la au moins une unité de levage (50).
EP22721409.5A 2021-05-07 2022-04-26 Dispositif de levage, unité de levage et véhicule de transport Active EP4334234B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102021002426 2021-05-07
PCT/EP2022/061024 WO2022233641A1 (fr) 2021-05-07 2022-04-26 Dispositif de levage, unité de levage et véhicule de transport

Publications (3)

Publication Number Publication Date
EP4334234A1 EP4334234A1 (fr) 2024-03-13
EP4334234C0 EP4334234C0 (fr) 2025-11-19
EP4334234B1 true EP4334234B1 (fr) 2025-11-19

Family

ID=81581190

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22721409.5A Active EP4334234B1 (fr) 2021-05-07 2022-04-26 Dispositif de levage, unité de levage et véhicule de transport

Country Status (4)

Country Link
EP (1) EP4334234B1 (fr)
CN (1) CN117295679A (fr)
DE (1) DE102022001451A1 (fr)
WO (1) WO2022233641A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102024119445A1 (de) * 2024-07-09 2026-01-15 Schaeffler Technologies AG & Co. KG Hubplattform und Arbeitsroboter

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE459923C (de) * 1926-01-09 1928-05-15 Werdohler Stanz U Dampfhammerw Teleskop-Spindel-Heber
US9505593B2 (en) * 2012-07-20 2016-11-29 Mslv Pty Ltd. Jacking device
DE102013019688B4 (de) 2013-11-26 2022-05-05 Sew-Eurodrive Gmbh & Co Kg Transportsystem mit Fahrzeug zum Transportieren eines Lastaufnahmemittels
DE102020000746A1 (de) 2019-02-12 2020-08-13 Sew-Eurodrive Gmbh & Co Kg Mobilteil
CN111762719A (zh) * 2020-07-23 2020-10-13 张海华 一种升降平台及其驱动方法

Also Published As

Publication number Publication date
CN117295679A (zh) 2023-12-26
EP4334234C0 (fr) 2025-11-19
EP4334234A1 (fr) 2024-03-13
WO2022233641A1 (fr) 2022-11-10
DE102022001451A1 (de) 2022-11-10

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