CN117295679A - Lifting device, lifting unit and transport vehicle - Google Patents
Lifting device, lifting unit and transport vehicle Download PDFInfo
- Publication number
- CN117295679A CN117295679A CN202280033170.2A CN202280033170A CN117295679A CN 117295679 A CN117295679 A CN 117295679A CN 202280033170 A CN202280033170 A CN 202280033170A CN 117295679 A CN117295679 A CN 117295679A
- Authority
- CN
- China
- Prior art keywords
- lifting
- lifting device
- nut
- lead screw
- 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.)
- Pending
Links
- 230000005540 biological transmission Effects 0.000 claims abstract description 7
- 230000032258 transport Effects 0.000 description 21
- 230000033001 locomotion Effects 0.000 description 9
- 230000001419 dependent effect Effects 0.000 description 3
- 238000005452 bending Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000003028 elevating effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Classifications
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- 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
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
The invention relates to a lifting device (10), in particular for a transport vehicle, comprising: the inner screw (4), an inner screw nut (5) which can rotate relative to the inner screw (4), an outer screw (6) and an outer screw nut (7) which can rotate relative to the outer screw (6), wherein the inner screw nut (5) is connected to the outer screw nut (7) in a rotationally fixed manner, in particular rigidly. The invention also relates to a lifting unit (50), in particular for a transport vehicle, comprising: the lifting device (10) comprises a motor (28), a driving wheel (29) and a transmission belt (40), and a plurality of lifting devices (10) according to the invention, wherein the motor (28) drives the transmission belt (40) through the driving wheel (29), and the transmission belt (40) drives an outer screw nut (7) of the lifting device (10) to rotate relative to an outer screw (6). The invention also relates to a transport vehicle, in particular an unmanned transport vehicle, comprising: the drive, an accumulator for supplying power to the drive and a control device for controlling the drive, and at least one lifting device (10) according to the invention and/or at least one lifting unit (50) according to the invention.
Description
Technical Field
The invention relates to a lifting device, in particular for a transport vehicle, comprising a threaded spindle and a threaded 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 also relates to a transport vehicle, in particular an unmanned transport vehicle.
Background
An unmanned transport vehicle is known from DE 10 2020 000 746 A1. The unmanned transport vehicle is used in technical installations, for example in production plants, for transporting objects, for example small parts or boxes. In addition, the mobile transport vehicle transports the components from a logistics area (e.g., a material warehouse) to a station where the components are processed. For lifting and lowering the articles to be transported, the unmanned transport vehicle has a height-adjustable receiving plate.
A vehicle having a lifting unit is known from DE 10 2013 019 688 A1. The lifting unit comprises a scissor lift which can be driven by a motor via a rotatable screw and screw nut.
Disclosure of Invention
The object of the invention is therefore to improve a lifting device, in particular for a transport vehicle; an elevating unit, in particular for a transport vehicle, is improved; and to an improved transport vehicle, in particular an unmanned transport vehicle.
According to the invention, this object is achieved by a lifting device having the features specified in claim 1. Advantageous embodiments and improvements of the invention are the subject matter of the dependent claims. This object is also achieved by a lifting unit having the features specified in claim 8. Advantageous embodiments and improvements are the subject matter of the dependent claims. This object is also achieved by a transport vehicle having the features specified in claim 11. Advantageous embodiments and improvements are the subject matter of the dependent claims.
The lifting device according to the invention, 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 connected to the outer spindle nut in a rotationally fixed manner, in particular rigidly.
The movement of the outer spindle relative to the inner spindle in the axial direction is achieved by the rotation of the inner spindle nut relative to the inner spindle and the rotation of the outer spindle nut relative to the outer spindle, which is referred to as the lifting stroke. By means of the lifting device according to the invention, relatively heavy loads can be lifted. The lifting device is thereby robust and functionally reliable. The lifting device comprises two threads, whereby a larger lifting stroke can be achieved at the same number of revolutions. The lifting device has a relatively small extent in the axial direction and is therefore particularly suitable for use on unmanned vehicles.
According to a preferred embodiment of the invention, the inner spindle nut is arranged coaxially in the outer spindle. The inner spindle nut and the outer spindle are thus arranged here concentrically with a central axis defining the axial direction. Advantageously, the lifting device has a small extent in the radial direction.
According to an advantageous embodiment of the invention, the outer spindle is coupled to the inner spindle in a rotationally fixed manner. Thus, the moment transmitted through the inner lead screw nut and the outer lead screw nut can be supported.
According to a preferred embodiment of the invention, the outer spindle is mounted so as to be movable in the axial direction relative to the inner spindle. Movement of the outer spindle relative to the inner spindle in the axial direction, which is also referred to as the lifting travel, is thus possible.
According to an advantageous embodiment of the invention, 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.
According to a preferred embodiment of the invention, the inner spindle nut comprises a first internal thread having a first orientation and the outer spindle nut comprises a second internal thread having a second orientation. Here, the first orientation and the second orientation are opposite to each other. When the inner lead screw and the inner lead screw nut are designed with right-hand threads, then the outer lead screw and the outer lead screw nut are designed with left-hand threads, or vice versa. Thus, when the inner lead screw rotates relative to the inner lead screw nut and the outer lead screw nut rotates relative to the outer lead screw, the lifting motions of the inner lead screw and the outer lead screw nut will be superimposed.
According to an advantageous embodiment of the invention, the outer spindle nut comprises an external toothing. The external toothing is used in particular for driving the outer spindle nut into rotation relative to the outer spindle by means of a toothed belt.
The lifting unit according to the invention, in particular for a transport vehicle, comprises a motor, a drive wheel, a drive belt and a plurality of lifting devices according to the invention, wherein the motor drives the drive belt via the drive wheel and the drive belt drives an outer spindle nut of the lifting device in rotation relative to the outer spindle. The lifting devices are arranged parallel to one another and offset from one another.
This allows relatively large transverse loads and the resulting moments to be absorbed without the risk of bending the threaded spindle or threaded spindle nut of the lifting device. The lifting unit is thereby made particularly suitable for load receiving of mobile applications, such as unmanned transport vehicles, in which large loads are applied to the lifting device as a result of a braking process due to the inertia of the load.
According to an advantageous embodiment of the invention, the drive belt is designed as a toothed belt and is in turn engaged with the external toothing of the outer spindle nut of the lifting device. This construction is relatively inexpensive and ensures that all lifting devices are driven uniformly.
According to a preferred embodiment of the invention, the lifting unit comprises a support plate, which is connected in a rotationally fixed manner, in particular rigidly, to the inner spindle of the lifting device. The support plate is used here in particular for receiving a load. The support plate also prevents the inner lead screw from rotating relative to the support plate and the inner lead screw from rotating relative to the outer lead screw.
The transport vehicle according to the invention, in particular the unmanned transport vehicle, comprises a drive, an accumulator for supplying power to the drive, a control device for controlling the drive, and at least one lifting device according to the invention and/or at least one lifting unit according to the invention.
According to an advantageous embodiment of the invention, the unmanned vehicle further comprises a travel sensor for detecting the lifting travel of the at least one lifting device according to the invention and/or of the at least one lifting unit according to the invention, i.e. the movement of the outer spindle relative to the inner spindle in the axial direction.
The invention is not limited to the combination of features of the claims. Other reasonable combinations of the claims and/or individual claim features and/or the description features and/or the drawing features are available to the person skilled in the art, in particular from the objects proposed and/or by comparison with the prior art.
Drawings
The invention will now be described in more detail with reference to the accompanying drawings. The invention is not limited to the embodiments shown in the drawings. The figures only schematically illustrate the subject matter of the invention. Wherein:
fig. 1 shows a top view of a lifting unit;
fig. 2 shows a cross-sectional view of the lifting unit in a retracted state;
fig. 3 shows a cross-sectional view of the lifting unit in an extended state;
fig. 4 shows a perspective view of the lifting unit in a retracted state; and
fig. 5 shows a perspective view of the lifting unit in the extended state.
Detailed Description
Fig. 1 shows a top view of the lifting unit 50. The lifting unit 50 includes a plurality (four in the present case) of lifting devices 10. Each of the lifting devices 10 includes an inner lead screw 4, an inner lead screw nut 5 rotatable relative to the inner lead screw 4, an outer lead screw 6, and an outer lead screw nut 7 rotatable relative to the outer lead screw 6, respectively. The inner lead screw nut 5 has a flange 8, in which figure the flange 8 covers the outer lead screw 6, the outer lead screw nut 7 and the remaining inner lead screw 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 the lifting device 10 are each constructed at least approximately rotationally symmetrically and are arranged concentrically to the central axis M. The inner lead screw 4 is coaxially arranged in an inner lead screw nut 5. The inner lead screw nut 5 is coaxially arranged in the outer lead screw 6. The outer lead screw 6 is coaxially arranged in an outer lead screw nut 7.
The lifting devices 10 of the lifting units 50 are fixedly connected to the independent floors 35 of the unmanned transport vehicle, respectively. Alternatively, it is also conceivable for the lifting device 10 to be connected to a common floor 35 of the unmanned vehicle. The lifting devices 10 are arranged parallel to one another and offset from one another. Thus, the central axes M of the lifting device 10 extend parallel to each other and respectively define the axial directions.
The outer lead screw nut 7 of the lifting device 10 comprises an external toothing 27, respectively. The lifting unit 50 includes a motor 28, a driving wheel 29, and a driving belt 40. The motor 28 drives the drive belt 40 via the drive wheel 29. The drive belt 40 is configured as a toothed belt and engages with the external toothing 27 of the external spindle nut 7 of the lifting device 10. The lifting unit 50 further includes a plurality of rollers 42, which guide the belt 40.
When the motor 28 drives the driving wheel 29, the outer lead screw nut 7 of the lifting device 10 is driven to rotate by the transmission belt 40. The outer spindle nut 7 of the lifting device 10 is rotated about the respective central axis M of the lifting device 10 relative to the outer spindle 6.
Fig. 2 shows a cross-sectional view of the lifting unit 50 in a retracted state along the section line A-A in fig. 1. Thus, two of the four lifting devices 10 can be seen. The lifting unit 50 comprises a support plate, not shown here, which is connected in a rotationally fixed manner, in particular rigidly, to the inner spindle 4 of the lifting device 10. The support plate is used in particular as a load receiver. The lifting device 10 is here identically constructed. Hereinafter, only one of the lifting devices 10 is referred to.
The outer spindle 6 of the lifting device 10 is rigidly connected to the floor 35 of the unmanned vehicle by means of a plurality of screws 30. The inner lead screw 4 is threadedly engaged with the inner lead screw nut 5 via a trapezoidal thread. Other types of threads are also conceivable. The outer lead screw nut 7 is threadedly engaged with the outer lead screw 6 via a trapezoidal thread. Other types of threads are also conceivable.
The flange 8 of the inner lead screw nut 5 is rigidly connected to the outer lead screw nut 7 by means of a plurality of screws 30. The inner spindle nut 5 is thereby connected in a rotationally fixed manner, in particular rigidly, to the outer spindle nut 7. Alternatively, it is also conceivable to connect the inner spindle nut 5 and the outer spindle nut 7 to one another by means of separate connecting rings.
The inner lead screw 4 is connected to the floor 35 of the unmanned vehicle in a rotationally fixed manner. The inner lead screw 4 is supported so as to be movable in the axial direction relative to the floor 35 of the unmanned carrier. Therefore, the inner lead screw 4 is coupled to the outer lead screw 6 in a relatively non-rotatable manner, and is supported in a movable manner relative to the outer lead screw 6 in the axial direction.
The extension of the lifting device 10 is achieved by the rotation of the outer lead screw nut 7 relative to the outer lead screw 6 being driven by the drive belt 40. Other types of drive are conceivable, by means of which a rotational movement of the outer spindle nut 7 relative to the outer spindle 6 is produced.
The outer lead screw nut 7 is driven to rotate via the external tooth part 27 by the movement of the transmission belt 40. This rotation produces a translational movement of the outer lead screw nut 7 in the axial direction relative to the outer lead screw 6 by means of the threads of the outer lead screw nut 7 and the outer lead screw 6. As a result of the rigid connection of the outer spindle nut 7 to the inner spindle nut 5, a translational movement of the inner spindle nut 5 in the axial direction relative to the outer spindle 6 is also achieved.
Since the outer spindle 6 is coupled in a rotationally fixed manner to the inner spindle 4, the inner spindle nut 5 is rotated relative to the inner spindle 4, as a result of which a translational movement of the inner spindle nut 5 relative to the inner spindle 6 in the axial direction is achieved by the threads of the inner spindle nut 5 and the inner spindle 4.
Fig. 3 shows a sectional view of the lifting unit 50 in the extended state along the sectional line A-A in fig. 1. Two of the four lifting devices 10 can thus be seen. As previously described, the lifting device 10 is configured identically herein. Hereinafter, only one of the lifting devices 10 is referred to.
The inner lead screw nut 5 has a first internal thread 15 in the form of a trapezoidal thread. The inner spindle 4 has an external thread in the form of a trapezoidal thread, which matches the first internal thread. The outer lead screw nut 7 has a second internal thread 17 in the form of a trapezoidal thread. The external screw spindle 6 has an external thread in the form of a trapezoidal thread which is matched to the second internal thread.
The first internal thread 15 of the internal spindle nut 5 has a first orientation, the first internal thread 15 being embodied here as a right-hand thread. The second internal thread 17 of the external spindle nut 7 has a second orientation, the second internal thread 17 being configured as a left-hand thread. Thus, the first orientation and the second orientation are opposite to each other.
Fig. 4 shows a perspective view of the lifting unit 50 in a retracted state. The motor 28 is fixedly connected to the unmanned vehicle and is thus arranged in a fixed position relative to the floor 35. The drive wheel 29 and the roller 42 can rotate relative to the base plate 35, but are likewise arranged fixedly in position relative to the base plate 35.
The belt 40 is disposed at a constant distance from the bottom plate 35 in the axial direction. In the retracted state shown in the figures, the drive belt 40 is located at the axial end of the outer spindle nut 7 of the lifting device 10 facing away from the base plate 35.
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 at the axial end of the outer spindle nut 7 of the lifting device 10 facing the base plate 35.
List of reference numerals:
4. inner screw
5. Inner screw nut
6. Outer screw
7. Outer screw nut
8. Flange
10. Lifting equipment
15. First internal thread
17. Second internal thread
27. External tooth part
28. Motor with a motor housing
29. Driving wheel
30. Screw bolt
35. Bottom plate
40. Transmission belt
42. Roller wheel
50. Lifting unit
A section line
M central axis
Claims (12)
1. Lifting device (10), in particular for a transport vehicle, comprising:
an inner screw (4),
an inner screw nut (5) rotatable relative to the inner screw (4),
an outer screw (6), and
an outer spindle nut (7) which can be rotated relative to the outer spindle (6), wherein,
the inner spindle nut (5) is connected to the outer spindle nut (7) in a rotationally fixed manner, in particular rigidly.
2. Lifting device (10) according to claim 1, characterized in that the inner lead screw nut (5) is arranged coaxially in the outer lead screw (6).
3. Lifting device (10) according to any of the preceding claims, characterized in that the outer screw (6) is coupled in a non-rotatable manner with the inner screw (4).
4. Lifting device (10) according to any of the preceding claims, characterized in that the outer screw (6) is supported in a manner movable in the axial direction relative to the inner screw (4).
5. Lifting device (10) according to any of the preceding claims, characterized in that the inner lead screw nut (5) and/or the outer lead screw nut (7) each have an internal thread (15, 17) in the form of a trapezoidal thread.
6. Lifting device (10) according to any of the preceding claims, characterized in that,
the inner lead screw nut (5) comprises a first internal thread (15) having a first orientation,
the outer spindle nut (7) comprises a second internal thread (17) having a second orientation,
the first orientation and the second orientation are opposite to each other.
7. Lifting device (10) according to any of the preceding claims, characterized in that the outer lead screw nut (7) comprises an external toothing (27).
8. Lifting unit (50), in particular for a transport vehicle, comprising:
a plurality of lifting devices (10) according to any one of the preceding claims,
A motor (28), a driving wheel (29) and a driving belt (40),
the motor (28) drives the drive belt (40) via the drive wheel (29),
the transmission belt (40) drives the outer screw nut (7) of the lifting device (10) to rotate relative to the outer screw (6).
9. Lifting unit (50) according to claim 8, characterized in that the drive belt (40) is configured as a toothed belt and is in turn meshed with the external toothing (27) of the external spindle nut (7) of the lifting device (10).
10. Lifting unit (50) according to claim 8 or 9, characterized in that the lifting unit (50) comprises a bearing plate which is connected in a rotationally fixed manner, in particular rigidly, to the inner spindle (4) of the lifting device (10).
11. Transport vehicle, in particular an unmanned transport vehicle, comprising:
a drive device, an accumulator for supplying power to the drive device and a control device for controlling the drive device, and,
lifting device (10) according to at least one of the preceding claims and/or lifting unit (50) according to at least one of the preceding claims.
12. Transport vehicle according to claim 11, further comprising a travel sensor for detecting the lifting of the at least one lifting device (10) and/or the at least one lifting unit (50).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102021002426 | 2021-05-07 | ||
| DE102021002426.5 | 2021-05-07 | ||
| PCT/EP2022/061024 WO2022233641A1 (en) | 2021-05-07 | 2022-04-26 | Lifting device, lifting unit and transport vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117295679A true CN117295679A (en) | 2023-12-26 |
Family
ID=81581190
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202280033170.2A Pending CN117295679A (en) | 2021-05-07 | 2022-04-26 | Lifting device, lifting unit and transport vehicle |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP4334234A1 (en) |
| CN (1) | CN117295679A (en) |
| DE (1) | DE102022001451A1 (en) |
| WO (1) | WO2022233641A1 (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE459923C (en) * | 1926-01-09 | 1928-05-15 | Werdohler Stanz U Dampfhammerw | Telescopic spindle lifter |
| KR102090030B1 (en) * | 2012-07-20 | 2020-03-18 | 티에프피 엔지니어링 피티와이 리미티드 | Jacking device |
| DE102013019688B4 (en) | 2013-11-26 | 2022-05-05 | Sew-Eurodrive Gmbh & Co Kg | Transport system with vehicle for transporting a load handling device |
| WO2020164804A1 (en) | 2019-02-12 | 2020-08-20 | Sew-Eurodrive Gmbh & Co. Kg | Mobile element |
| CN111762719A (en) * | 2020-07-23 | 2020-10-13 | 张海华 | Lifting platform and driving method thereof |
-
2022
- 2022-04-26 CN CN202280033170.2A patent/CN117295679A/en active Pending
- 2022-04-26 EP EP22721409.5A patent/EP4334234A1/en active Pending
- 2022-04-26 WO PCT/EP2022/061024 patent/WO2022233641A1/en active Application Filing
- 2022-04-26 DE DE102022001451.3A patent/DE102022001451A1/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| WO2022233641A1 (en) | 2022-11-10 |
| EP4334234A1 (en) | 2024-03-13 |
| DE102022001451A1 (en) | 2022-11-10 |
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