EP4313840A1 - Hubvorrichtung und transportfahrzeug - Google Patents
Hubvorrichtung und transportfahrzeugInfo
- Publication number
- EP4313840A1 EP4313840A1 EP22710417.1A EP22710417A EP4313840A1 EP 4313840 A1 EP4313840 A1 EP 4313840A1 EP 22710417 A EP22710417 A EP 22710417A EP 4313840 A1 EP4313840 A1 EP 4313840A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- lifting device
- spindle nut
- spindle
- inner spindle
- nut
- 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
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
- 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
-
- 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
-
- 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
- B66F2700/00—Lifting apparatus
- B66F2700/04—Jacks with screw and nut
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 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.
- a telescoping linear drive is known from DE 203 16099 U1. This has two spindles, which are arranged parallel and at a distance from one another, a guide tube and a telescopic tube.
- 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.
- 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 is non-rotatably, in particular rigidly, connected to the outer spindle.
- a rotation of the inner spindle and the outer spindle relative to the inner spindle nut and to the outer spindle nut results in a movement of the outer spindle nut relative to the inner spindle nut 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 is arranged coaxially in the outer spindle.
- the inner spindle and the outer spindle are arranged concentrically to a central axis that defines the axial direction.
- the inner spindle nut is arranged coaxially in the outer spindle nut.
- the inner spindle nut and the outer spindle nut are arranged concentrically to a central axis that defines the axial direction.
- 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.
- expansion of the lifting device in the radial direction is advantageously small.
- An expansion of the inner spindle in the axial direction, an expansion of the inner spindle nut in the axial direction, an expansion of the outer 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 inner spindle around the central axis.
- the spindles and the spindle nuts thus have a relatively large radius and relatively large diameter in relation to their axial extent.
- the lifting device particularly suitable for mobile applications, such as the load pick-up of a driverless transport vehicle, in which braking processes act on the lifting device due to the inertia of the load.
- the outer spindle nut is coupled to the inner spindle nut in a torque-proof manner. A torque transmitted through the inner spindle and the outer spindle can thus be intercepted.
- the outer spindle nut is movably mounted in the axial direction relative to the inner spindle nut. This allows the outer spindle nut to move relative to the inner spindle nut 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 are 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.
- 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 inner spindle has internal teeth. The internal toothing is used in particular for the rotational drive of the inner spindle relative to the inner spindle nut by means of a pinion.
- the lifting device comprises an electric motor and a pinion for driving the inner spindle in rotation relative to the inner spindle nut.
- the pinion meshes with the internal teeth of the inner spindle.
- the electric motor and the pinion are arranged in a space-saving manner inside the inner 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 inner 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 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 outer spindle 6 has a flange 8 which covers the inner spindle nut 5 and the rest of the spindle 6 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 are each at least approximately rotationally symmetrical and arranged concentrically to the 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 inner spindle 4 includes an internal toothing 24.
- the lifting device 10 includes a pinion 29 and an electric motor 28 for driving the pinion 29.
- the pinion 29 meshes with the internal toothing 24 of the inner spindle 4.
- the electric motor 28 drives the pinion 29, so is the inner spindle 4 is rotated about the central axis M relative to the inner spindle nut 5 .
- the electric motor 28 and the pinion 29 thus serve to drive the inner spindle 4 in rotation relative to the inner spindle nut 5.
- FIG 2 shows a sectional view of the lifting device 10 along the section line AA in Figure 1 in the retracted state.
- the inner spindle nut 5 is firmly connected to a base plate 35 of a driverless transport vehicle by means of a number of screws 30 .
- Of the Electric motor 28 is also firmly connected to base plate 35 .
- the electric motor 28 and the pinion 29 are not shown in this illustration.
- 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 flange 8 of the outer spindle 6 is firmly connected to the inner spindle 4 by means of a number of screws 30 .
- the inner spindle 4 is thus non-rotatably, in particular rigidly, connected to the outer spindle 6 .
- 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 lifting device 10 comprises a support plate, not shown here, which is non-rotatably, in particular rigidly, connected to the outer spindle nut 7 .
- the support plate serves as a load bearing.
- the outer spindle nut 7 is non-rotatably connected to the base plate 35 of the driverless transport vehicle.
- the outer spindle nut 7 is movably mounted in the axial direction relative to the base plate 35 of the driverless transport vehicle.
- the outer spindle nut 7 is thus coupled in a torque-proof manner to the inner spindle nut 5 and is mounted so that it can move in the axial direction relative to the inner spindle nut 5 .
- the lifting device 10 is extended by a rotary drive of the inner spindle 4 relative to the inner spindle nut 5 by the electric motor 28 and the pinion 29.
- Other types of drive are also conceivable, through which a rotary movement of the inner spindle 4 relative to the inner spindle nut 5 is generated.
- a rotation of the pinion 29 drives the inner spindle 4 in rotation via the inner teeth 24 . Due to the thread of the inner spindle nut 5 and the inner spindle 4, this rotation produces a translatory movement of the inner spindle 4 in the axial direction. Since the outer spindle 6 is firmly connected to the inner spindle 4, this also results in a translatory movement of the outer spindle 6 in the axial direction.
- FIG. 3 shows a sectional representation of the lifting device 10 along the section line A-A in FIG. 1 in the extended state.
- the inner spindle nut 5 has a first internal thread 15 in
- 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; 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)
- Transportation (AREA)
- Structural Engineering (AREA)
- Civil Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mechanical Engineering (AREA)
- Transmission Devices (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102021001554.1A DE102021001554B3 (de) | 2021-03-25 | 2021-03-25 | Hubvorrichtung und Transportfahrzeug |
| PCT/EP2022/056579 WO2022200109A1 (de) | 2021-03-25 | 2022-03-14 | Hubvorrichtung und transportfahrzeug |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4313840A1 true EP4313840A1 (de) | 2024-02-07 |
Family
ID=80775267
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP22710417.1A Pending EP4313840A1 (de) | 2021-03-25 | 2022-03-14 | Hubvorrichtung und transportfahrzeug |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP4313840A1 (de) |
| CN (1) | CN117561212A (de) |
| DE (2) | DE102021001554B3 (de) |
| WO (1) | WO2022200109A1 (de) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1518490A (en) * | 1924-03-20 | 1924-12-09 | Randall M Dixon | Compound screw jack |
| DE20316099U1 (de) | 2003-10-21 | 2005-03-10 | Herbert Grüttner GmbH & Co. KG | Telekopierbarer Linearantrieb |
| DE102013019688B4 (de) | 2013-11-26 | 2022-05-05 | Sew-Eurodrive Gmbh & Co Kg | Transportsystem mit Fahrzeug zum Transportieren eines Lastaufnahmemittels |
| CN209177916U (zh) * | 2018-11-30 | 2019-07-30 | 嘉兴金鹏工具有限公司 | 一种多节伸缩式千斤顶 |
| WO2020164804A1 (de) | 2019-02-12 | 2020-08-20 | Sew-Eurodrive Gmbh & Co. Kg | Mobilteil |
| CN110844824A (zh) * | 2019-11-15 | 2020-02-28 | 合肥森印科技有限公司 | 一种大伸缩比的n级电动伸缩装置及其应用 |
-
2021
- 2021-03-25 DE DE102021001554.1A patent/DE102021001554B3/de active Active
-
2022
- 2022-03-14 CN CN202280014446.2A patent/CN117561212A/zh active Pending
- 2022-03-14 WO PCT/EP2022/056579 patent/WO2022200109A1/de not_active Ceased
- 2022-03-14 EP EP22710417.1A patent/EP4313840A1/de active Pending
- 2022-03-14 DE DE102022000882.3A patent/DE102022000882A1/de active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| DE102022000882A1 (de) | 2022-09-29 |
| DE102021001554B3 (de) | 2022-05-12 |
| WO2022200109A1 (de) | 2022-09-29 |
| CN117561212A (zh) | 2024-02-13 |
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Legal Events
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| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
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| 17P | Request for examination filed |
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| AK | Designated contracting states |
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| DAX | Request for extension of the european patent (deleted) | ||
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| 17Q | First examination report despatched |
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