EP4334234A1 - Hubvorrichtung, hubeinheit und transportfahrzeug - Google Patents
Hubvorrichtung, hubeinheit und transportfahrzeugInfo
- Publication number
- EP4334234A1 EP4334234A1 EP22721409.5A EP22721409A EP4334234A1 EP 4334234 A1 EP4334234 A1 EP 4334234A1 EP 22721409 A EP22721409 A EP 22721409A EP 4334234 A1 EP4334234 A1 EP 4334234A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- lifting
- spindle nut
- spindle
- outer spindle
- transport vehicle
- 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.)
- Granted
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
- Lifting device lifting unit and transport vehicle
- 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 lifting unit, in particular for a transport vehicle, which comprises a plurality of lifting devices according to the invention.
- the invention also relates to a transport vehicle, in particular a driverless transport vehicle.
- a driverless transport vehicle is known from document DE 102020000746 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.
- the invention is based on the object 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.
- a lifting device in particular for a transport vehicle, comprises an inner spindle, an inner spindle nut which can be rotated relative to the inner spindle, an outer spindle and an outer spindle nut which can be rotated relative to the outer spindle.
- the inner spindle nut is non-rotatably connected to the outer spindle nut, in particular rigidly.
- a rotation of the inner spindle nut and the outer spindle nut relative to the inner spindle and to the outer spindle results in a movement of the outer spindle relative to the inner 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 inner spindle nut is arranged coaxially in the outer spindle.
- the inner spindle nut and the outer spindle are arranged concentrically to a central axis that defines the axial direction.
- the outer spindle is coupled to the inner spindle in a rotationally fixed manner. A torque transmitted by the inner spindle nut and the outer spindle nut can thus be intercepted.
- the outer spindle is movably mounted relative to the inner spindle in the axial direction. This allows the outer spindle to move relative to the inner spindle in the axial direction, which is referred to as a 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 orientation and the second orientation opposite to each other. If the inner spindle and the inner spindle nut are designed with a right-hand thread, the outer spindle and the outer spindle nut are designed with a left-hand thread, and vice versa. As a result, the stroke movements of the inner spindle and the outer spindle nut add up when the inner spindle and the outer spindle rotate relative to the inner spindle nut and to the outer spindle nut.
- the outer spindle nut includes external teeth.
- the external toothing serves in particular to drive the external spindle nut in rotation relative to the external spindle by means of a toothed belt.
- a lifting unit according to the invention in particular for a transport vehicle, comprises a plurality of lifting devices according to the invention, an electric motor, a drive wheel and a drive belt, the electric motor driving the drive belt via the drive wheel, and the drive belt rotating the outer spindle nuts of the lifting devices relative to the outer spindles drives.
- the lifting devices are arranged offset in parallel to one another.
- the lifting unit particularly suitable for mobile applications, such as the load pick-up of a driverless transport vehicle, in which braking processes act on the lifting devices due to the inertia of the load.
- 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 structure is relatively inexpensive and guarantees a uniform drive of all lifting devices.
- the lifting unit comprises a support plate which is non-rotatably, in particular rigidly, connected to the inner spindles of the lifting devices.
- the support plate is used in particular to accommodate loads. Further, the support plate prevents rotation of the inner spindles relative to the support plate and relative to the outer spindles.
- 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 at least one lifting device according to the invention and/or at least one lifting unit according to the invention.
- the driverless transport vehicle also includes a stroke sensor for detecting a stroke, i.e. a movement of the outer spindles relative to the inner spindles in the axial direction, of the at least one lifting device according to the invention and/or the at least one lifting unit according to the invention.
- Figure 1 a plan view of a lifting unit
- Figure 2 a sectional view of the lifting unit in the retracted state
- Figure 3 a sectional view of the lifting unit in the extended state
- Figure 4 a perspective view of the lifting unit in the retracted state
- FIG. 5 a perspective representation of the lifting unit in the extended state.
- FIG. 1 shows a top view of a lifting unit 50.
- the lifting unit 50 includes several, in this case four, lifting devices 10.
- Each of the lifting devices 10 includes 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 covers the outer spindle 6, the outer spindle nut 7 and the rest of the inner spindle nut 5 in this representation.
- 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 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 firmly connected to a separate base plate 35 of a driverless transport vehicle. Alternatively, it is conceivable that the lifting devices 10 are connected to a common base plate 35 of the driverless transport vehicle.
- the lifting devices 10 are arranged offset in parallel to one another. The central axes M of the lifting devices 10 thus run parallel to one another and each define an axial direction.
- the outer spindle nuts 7 of the lifting devices 10 each include external teeth 27.
- the lifting unit 50 includes 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 in rotation by the drive belt 40.
- 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 representation of the lifting unit 50 along the section line A-A in FIG. 1 in the retracted state. Two of the four lifting devices 10 are thus visible.
- the lifting unit 50 includes a support plate, not shown here, which is non-rotatably, in particular rigidly, connected to the inner spindles 4 of the lifting devices 10 .
- the support plate is used in particular as a load bearing.
- the lifting devices 10 are of identical design. In the following, reference is made to one of said lifting devices 10 .
- the outer spindle 6 of the lifting device 10 is rigidly connected to the base plate 35 of the driverless transport vehicle by means of several screws 30 .
- the inner spindle 4 is screwed to the inner spindle nut 5 via a trapezoidal thread. Other types of threads are also conceivable here.
- the outer spindle nut 7 is screwed to the outer spindle 6 via a trapezoidal thread. Other types of threads 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 non-rotatably, in particular rigidly, connected to the outer spindle nut 7 .
- the inner spindle 4 is non-rotatably connected to the base plate 35 of the driverless transport vehicle.
- the inner spindle 4 is relative to the base plate 35 of the driverless Transport vehicle movably mounted in the axial direction.
- the inner spindle 4 is rotationally coupled to the outer spindle 6 and is movably mounted relative to the outer spindle 6 in the axial direction.
- the lifting device 10 is extended by a rotary drive of the outer spindle nut 7 relative to the outer spindle 6 by the drive belt 40.
- Other types of drive are also conceivable, through which a rotary movement of the outer spindle nut 7 relative to the outer spindle 6 is generated.
- a movement of the drive belt 40 drives the outer spindle nut 7 in rotation via the outer teeth 27 . Due to the thread of the outer spindle nut 7 and the outer spindle 6, this rotation produces 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 translatory 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.
- the thread of the inner spindle nut 5 and the inner spindle 4 results in a translational movement of the inner spindle nut 5 relative to of the inner spindle 6 in the axial direction.
- FIG. 3 shows a sectional representation of the lifting unit 50 along the section line A-A in FIG. 1 in the extended state. Two of the four lifting devices 10 are thus visible. As already mentioned, the lifting devices 10 are of identical design in the present case. In the following, reference is made to one of said 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 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 outer 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, which is present 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.
- FIG. 4 shows a perspective view of the lifting unit 50 in the retracted state.
- the electric motor 28 is firmly connected to the driverless transport vehicle and is therefore arranged in a stationary manner in relation to the base plates 35 .
- the drive wheel 29 and the rollers 42 are rotatable relative to the base plates 35 but are also arranged stationary relative to the base plates 35 .
- the drive belt 40 is in the axial direction at a constant distance from the
- FIG. 5 shows a perspective view of the lifting unit 50 in the extended state. In the extended state shown here, the drive belt 40 is located on 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)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102021002426 | 2021-05-07 | ||
| PCT/EP2022/061024 WO2022233641A1 (de) | 2021-05-07 | 2022-04-26 | Hubvorrichtung, hubeinheit und transportfahrzeug |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP4334234A1 true EP4334234A1 (de) | 2024-03-13 |
| EP4334234B1 EP4334234B1 (de) | 2025-11-19 |
| EP4334234C0 EP4334234C0 (de) | 2025-11-19 |
Family
ID=81581190
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP22721409.5A Active EP4334234B1 (de) | 2021-05-07 | 2022-04-26 | Hubvorrichtung, hubeinheit und transportfahrzeug |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP4334234B1 (de) |
| CN (1) | CN117295679A (de) |
| DE (1) | DE102022001451A1 (de) |
| WO (1) | WO2022233641A1 (de) |
Families Citing this family (1)
| 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)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE459923C (de) * | 1926-01-09 | 1928-05-15 | Werdohler Stanz U Dampfhammerw | Teleskop-Spindel-Heber |
| ES2713552T3 (es) * | 2012-07-20 | 2019-05-22 | Tfp Engineering Pty Ltd | Dispositivo de elevación |
| DE102013019688B4 (de) | 2013-11-26 | 2022-05-05 | Sew-Eurodrive Gmbh & Co Kg | Transportsystem mit Fahrzeug zum Transportieren eines Lastaufnahmemittels |
| WO2020164804A1 (de) | 2019-02-12 | 2020-08-20 | 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 |
-
2022
- 2022-04-26 WO PCT/EP2022/061024 patent/WO2022233641A1/de not_active Ceased
- 2022-04-26 EP EP22721409.5A patent/EP4334234B1/de active Active
- 2022-04-26 CN CN202280033170.2A patent/CN117295679A/zh active Pending
- 2022-04-26 DE DE102022001451.3A patent/DE102022001451A1/de active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| DE102022001451A1 (de) | 2022-11-10 |
| EP4334234B1 (de) | 2025-11-19 |
| EP4334234C0 (de) | 2025-11-19 |
| WO2022233641A1 (de) | 2022-11-10 |
| CN117295679A (zh) | 2023-12-26 |
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