EP4298048A1 - Dispositif de levage et véhicule de transport - Google Patents

Dispositif de levage et véhicule de transport

Info

Publication number
EP4298048A1
EP4298048A1 EP22702954.3A EP22702954A EP4298048A1 EP 4298048 A1 EP4298048 A1 EP 4298048A1 EP 22702954 A EP22702954 A EP 22702954A EP 4298048 A1 EP4298048 A1 EP 4298048A1
Authority
EP
European Patent Office
Prior art keywords
spindle
lifting device
spindle nut
nut
movable
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.)
Pending
Application number
EP22702954.3A
Other languages
German (de)
English (en)
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 EP4298048A1 publication Critical patent/EP4298048A1/fr
Pending legal-status Critical Current

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
    • 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, which includes a spindle and a spindle nut.
  • the invention also relates to a transport vehicle, in particular a driverless transport vehicle.
  • a driverless transport vehicle is known from document DE 102020000 746 A1.
  • Driverless transport vehicles are used in technical systems, for example in production plants, for transporting objects, for example small parts or boxes.
  • the mobile transport vehicles mentioned bring, among other things, components from logistics areas, such as a material warehouse, to workplaces where the components are processed.
  • the driverless transport vehicle has a receiving plate, which is height-adjustable, for raising and lowering objects to be transported.
  • a vehicle is known from document DE 102013019688 A1, which has a lifting unit.
  • the lifting unit includes a scissor lift table, which can be driven by a motor via a rotatable spindle and a spindle nut.
  • Document EP 1 097657 A1 discloses a telescopic drive unit which has two spindles that can be driven in rotation.
  • the spindles are coupled to one another by drivers in such a way that they can be driven to rotate at the same speed and in the same direction of rotation.
  • Document DE 102019200 311 A1 discloses a conveying device for conveying objects, which comprises a number of vehicles. Each vehicle includes a lifting unit.
  • the invention is based on the object of further developing a lifting device, in particular for a transport vehicle, and a transport vehicle, in particular a driverless transport vehicle.
  • the object is achieved according to the invention by a lifting device with the features specified in claim 1.
  • Advantageous refinements and developments are the subject of the dependent claims.
  • the object is also achieved by a transport vehicle having the features specified in claim 13.
  • Advantageous refinements and developments are the subject of the dependent claims.
  • a lifting device in particular for a transport vehicle, comprises a fixed spindle, an inner spindle nut which can be rotated relative to the fixed spindle, a movable spindle and an outer spindle nut which can be rotated relative to the movable spindle.
  • the inner spindle nut is non-rotatably, in particular rigidly, connected to the movable spindle.
  • a rotation of the inner spindle nut and the movable spindle relative to the fixed spindle and to the outer spindle nut results in a movement of the outer spindle nut relative to the fixed spindle in an axial direction, which is referred to as a stroke.
  • Relatively heavy loads can be lifted by means of the lifting device according to the invention.
  • the lifting device is designed to be robust and functionally reliable.
  • the lifting device has two threads, which means that a larger stroke can be achieved with the same number of revolutions.
  • the lifting device has only a relatively small extent in the axial direction and is therefore particularly suitable for use on a driverless transport vehicle.
  • the lifting device also includes a support plate which is non-rotatably, in particular rigidly, connected to the outer spindle nut.
  • the support plate serves to absorb loads.
  • the inner spindle nut is arranged coaxially in the movable spindle.
  • the inner spindle nut and the movable spindle are arranged concentrically to a central axis M, which defines the axial direction.
  • An expansion of the fixed spindle in the axial direction, an expansion of the inner spindle nut in the axial direction, an expansion of the movable spindle in the axial direction and an expansion of the outer spindle nut in the axial direction are each less than a radius of the fixed spindle around the central axis.
  • the spindles and the Spindle nuts therefore have a relatively large radius and relatively large diameter in relation to their axial extension.
  • relatively large transverse loads and the moments resulting therefrom can be accommodated without risking the spindles or the spindle nuts buckling.
  • a composite ring is advantageously firmly connected to the inner spindle nut and to the movable spindle.
  • the inner spindle nut is non-rotatably, in particular rigidly, connected to the movable spindle.
  • the outer spindle nut is coupled to the stationary spindle in a torque-proof manner. A torque transmitted by the inner spindle nut and the movable spindle can thus be intercepted.
  • the outer spindle nut is movably mounted in the axial direction relative to the stationary spindle. This allows the outer spindle nut to move relative to the fixed spindle in the axial direction, which is referred to as a stroke.
  • the inner spindle nut and/or the outer spindle nut 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 orientation and the second orientation are opposite to each other. If the fixed spindle and inner spindle nut are right-hand threaded, the movable spindle and outer spindle nut are left-hand threaded, and vice versa. As a result, the stroke movements of the inner spindle nut and the outer spindle nut add up when the inner spindle nut and the movable spindle rotate relative to the fixed spindle and to the outer spindle nut.
  • the lifting device comprises an outer ring which is coupled to the inner spindle nut in a torque-proof manner.
  • the outer ring has teeth, for example, and is used to drive the inner spindle nut in rotation relative to the stationary spindle.
  • the inner spindle nut is movably mounted relative to the outer ring in the axial direction.
  • the outer ring remains in its position in the axial direction, ie it does not experience any movement in the axial direction.
  • the lifting device includes an electric motor for driving the outer ring in rotation relative to the stationary spindle.
  • a transport vehicle according to the invention in particular a driverless transport vehicle, comprises a drive device, an electrical energy store for supplying the drive device and a control device for controlling the drive device and a lifting device according to the invention.
  • the driverless transport vehicle also includes a stroke sensor for detecting a stroke, ie a movement of the outer spindle nut relative to the fixed spindle in the axial direction, of the lifting device according to the invention.
  • Figure 1 a plan view of a lifting device
  • Figure 2 a sectional view of the lifting device in the retracted state
  • FIG. 3 a sectional view of the lifting device in the extended state.
  • FIG. 1 shows a plan view of a lifting device 10 along a central axis M, which defines an axial direction.
  • the lifting device 10 comprises a fixed spindle 4 , an inner spindle nut 5 which is rotatable relative to the fixed spindle 4 , a movable spindle 6 and an outer spindle nut 7 which is rotatable relative to the movable spindle 6 .
  • the lifting device 10 also includes a composite ring 8 which covers the inner spindle nut 5 and the movable spindle 6 in this representation.
  • the fixed spindle 4, the inner spindle nut 5, the movable spindle 6, the outer spindle nut 7 and the connecting ring 8 are each at least approximately rotationally symmetrical and arranged concentrically to the central axis M.
  • the fixed spindle 4 is arranged coaxially in the inner spindle nut 5 .
  • the inner spindle nut 5 is arranged coaxially in the movable spindle 6 .
  • the movable spindle 6 is arranged coaxially in the outer spindle nut 7 .
  • FIG. 2 shows a sectional representation of the lifting device 10 along the section line A-A in FIG. 1 in the retracted state.
  • the lifting device 10 also includes a drive flange 3, a stationary inner ring 1 and an outer ring 2.
  • the stationary spindle 4 and the inner ring 1 are firmly connected to the base plate of a driverless transport vehicle or to another foundation.
  • the stationary spindle 4 is thus rigidly connected to the inner ring 1 .
  • the stationary spindle 4 is screwed to the inner spindle nut 5 via a trapezoidal thread. Other types of threads are also conceivable here.
  • the inner spindle nut 5 is rotationally connected to the drive flange 3 .
  • the inner spindle nut 5 can be displaced in the axial direction relative to the drive flange 3 . Conceivable solutions for this are a splined shaft connection, polygonal shaft connection, serrated connection or other form-fitting connections with axial mobility.
  • the drive flange 3 is rigidly connected to the outer ring 2 .
  • the inner ring 1 and the outer ring 2 are rotatably mounted relative to one another. This is the only degree of freedom of the bearing.
  • the outer ring 2 is thus rotationally coupled to the inner spindle nut 5 .
  • the inner spindle nut 5 is movably mounted relative to the outer ring 2 in the axial direction.
  • the composite ring 8 is firmly connected to the inner spindle nut 5 and to the movable spindle 6 .
  • the inner spindle nut 5 is thus connected to the movable spindle 6 in a rotationally, in particular rigidly, manner.
  • the outer spindle nut 7 is screwed to the movable spindle 6 via a trapezoidal thread. Other types of threads are also conceivable here.
  • the lifting device 10 includes a support plate, not shown here, which is connected to the outer spindle nut 7 in a rotating manner, in particular rigidly.
  • the support plate serves as a load bearing.
  • the outer spindle nut 7 is rotationally connected to the base plate of the driverless transport vehicle or to the other foundation.
  • the outer spindle nut 7 is movably mounted in the axial direction relative to the base plate of the driverless transport vehicle or to the other foundation.
  • the outer spindle nut 7 is rotationally coupled to the fixed spindle 4 and is movably mounted relative to the fixed spindle 4 in the axial direction.
  • the lifting device 10 is extended by a rotary drive of the outer ring 2 relative to the stationary spindle 4.
  • the lifting device 10 includes an electric motor, not shown here.
  • Other types of drive are also conceivable, through which a rotary movement of the outer ring 2 is generated.
  • the drive flange 3 rotates, which drives the inner spindle nut 5 in rotation.
  • this rotation generates a translational movement of the inner Spindle nut 5 in the axial direction.
  • the movable spindle 6 is firmly connected to the inner spindle nut 5, this also results in a translatory movement of the movable spindle 6 in the axial direction.
  • the outer spindle nut 7 is coupled to the stationary spindle 4 in a torque-proof manner, the movable spindle 6 rotates relative to the outer spindle nut 7.
  • FIG 3 shows a sectional view of the lifting device 10 along the section line AA in Figure 1 in the extended state.
  • the inner spindle nut 5 has a first internal thread 15 in the form of a trapezoidal thread.
  • the fixed spindle 4 has a matching 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 movable spindle 6 has a matching 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 the present 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 the present case, the second internal thread 17 is designed as a left-hand thread. The first orientation and the second orientation are thus opposite to each other.

Landscapes

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

Abstract

L'invention concerne un dispositif de levage (10), en particulier pour un véhicule de transport, comprenant une broche fixe (4), un écrou de broche interne (5) qui peut tourner par rapport à la broche fixe (4), une broche mobile (6) et un écrou de broche externe (7) qui peut tourner par rapport à la broche mobile (6), l'écrou de broche interne (5) étant relié à la broche mobile (6) de manière solidaire en rotation, en particulier de manière rigide. L'invention concerne également un véhicule de transport, en particulier un véhicule de transport sans conducteur, comprenant un dispositif d'entraînement, un accumulateur d'énergie électrique destiné à alimenter le dispositif d'entraînement, un dispositif de commande destiné à commander le dispositif d'entraînement et un dispositif de levage (10) selon l'invention.
EP22702954.3A 2021-02-26 2022-01-31 Dispositif de levage et véhicule de transport Pending EP4298048A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102021001050 2021-02-26
PCT/EP2022/052244 WO2022179804A1 (fr) 2021-02-26 2022-01-31 Dispositif de levage et véhicule de transport

Publications (1)

Publication Number Publication Date
EP4298048A1 true EP4298048A1 (fr) 2024-01-03

Family

ID=80222636

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22702954.3A Pending EP4298048A1 (fr) 2021-02-26 2022-01-31 Dispositif de levage et véhicule de transport

Country Status (3)

Country Link
EP (1) EP4298048A1 (fr)
DE (1) DE102022000378A1 (fr)
WO (1) WO2022179804A1 (fr)

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1531733A (en) * 1924-11-01 1925-03-31 Elite Mfg Company Vehicle jack
DE459923C (de) * 1926-01-09 1928-05-15 Werdohler Stanz U Dampfhammerw Teleskop-Spindel-Heber
DE29919215U1 (de) 1999-11-03 2000-03-16 Dewert Antriebs Systemtech Teleskopantriebseinheit
AU2013204283A1 (en) * 2012-07-20 2014-02-06 Phillip Farquharson Jack and support device
DE102013019688B4 (de) 2013-11-26 2022-05-05 Sew-Eurodrive Gmbh & Co Kg Transportsystem mit Fahrzeug zum Transportieren eines Lastaufnahmemittels
DE102013020851A1 (de) * 2013-12-12 2015-06-18 Grenzebach Maschinenbau Gmbh Fahrerloses Transportfahrzeug für den Transport schwerer Lasten auf Lafetten und Verfahren zum Betrieb des Transportfahrzeugs
DE102019200311A1 (de) 2019-01-11 2020-07-16 Dürr Systems Ag Fördervorrichtung, Bearbeitungsanlage, Verfahren zum Fördern und/oder Bearbeiten von Gegenständen
DE102020000746A1 (de) 2019-02-12 2020-08-13 Sew-Eurodrive Gmbh & Co Kg Mobilteil

Also Published As

Publication number Publication date
DE102022000378A1 (de) 2022-09-01
WO2022179804A1 (fr) 2022-09-01

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