CN117561212A - Lifting equipment and transport vehicle - Google Patents
Lifting equipment and transport vehicle Download PDFInfo
- Publication number
- CN117561212A CN117561212A CN202280014446.2A CN202280014446A CN117561212A CN 117561212 A CN117561212 A CN 117561212A CN 202280014446 A CN202280014446 A CN 202280014446A CN 117561212 A CN117561212 A CN 117561212A
- Authority
- CN
- China
- Prior art keywords
- lifting device
- nut
- spindle
- lead screw
- screw 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
- 230000032258 transport Effects 0.000 description 17
- 230000001419 dependent effect Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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
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
The invention relates to a lifting device (10), in particular for a transport vehicle, comprising an inner spindle (4), an inner spindle nut (5) which can be rotated relative to the inner spindle (4), an outer spindle (6) and an outer spindle nut (7) which can be rotated relative to the outer spindle (6), wherein the inner spindle (4) is connected in a rotationally fixed manner, in particular rigidly, to the outer spindle (6). The invention also relates to a transport vehicle, in particular an unmanned transport vehicle, comprising a drive, an accumulator for supplying power to the drive, a control device for controlling the drive, and a lifting device (10) 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 transport vehicle, in particular an unmanned transport vehicle.
Background
An unmanned transport vehicle is known from DE 10 2020 000 746 A1. Unmanned vehicles are used in technical facilities, for example in production plants, for transporting objects, for example small parts or boxes. In addition, the mobile transport carriage transports the components from an area of the material flow, for example a material warehouse, to a working site 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 table which can be driven by a motor via a rotatable spindle and a spindle nut.
A telescopic linear drive is known from DE 203 16 099u 1. The telescopic linear drive has two threaded rods, which are arranged parallel to one another and spaced apart from one another, a guide tube and a telescopic tube.
Disclosure of Invention
The object of the invention is to improve a lifting device, in particular for a transport vehicle, and to improve a 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 are the subject matter of the dependent claims. This object is also achieved by a transport vehicle having the features specified in claim 13. 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 is connected to the outer spindle in a rotationally fixed manner, in particular rigidly.
The movement of the outer lead screw nut relative to the inner lead screw nut in the axial direction is achieved by rotation of the inner lead screw relative to the inner lead screw nut and rotation of the outer lead screw relative to the outer lead screw nut, which is referred to as lifting. A relatively heavy load can be lifted by means of the lifting device according to the invention. The lifting device is thereby robust and functionally reliable. The lifting device comprises two threads, whereby a greater degree of lifting 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 lifting device further comprises a support plate, which is connected in a rotationally fixed manner, in particular rigidly, to the outer spindle nut. The support plate is used here to receive a load.
According to an advantageous embodiment of the invention, the inner spindle is arranged coaxially in the outer spindle. Here, the inner lead screw and the outer lead screw are arranged concentrically with a central axis defining the axial direction. The extent of the lifting device in the radial direction is thereby advantageously small.
According to an advantageous embodiment of the invention, the inner spindle nut is arranged coaxially in the outer spindle nut. Here, the inner lead screw nut and the outer lead screw nut are arranged concentrically with a central axis defining the axial direction. The extent of the lifting device in the radial direction is thereby advantageously small.
According to an advantageous embodiment of the invention, the inner spindle nut is arranged coaxially in the outer spindle. Here, the inner lead screw nut and the outer lead screw are arranged concentrically with a central axis defining the axial direction. The extent of the lifting device in the radial direction is thereby advantageously small.
Advantageously, the extension of the inner lead screw in the axial direction, the extension of the inner lead screw nut in the axial direction, the extension of the outer lead screw in the axial direction and the extension of the outer lead screw nut in the axial direction are each smaller than the radius of the inner lead screw around the central axis. Thus, these lead screws and lead screw nuts have a relatively large radius and a relatively large diameter compared to their axial extension. Hereby, relatively large transverse loads and the moment generated thereby can be received without the risk of bending the threaded spindle or the threaded spindle nut. The lifting device is thereby particularly suitable for load receiving in mobile applications, such as unmanned transport vehicles, wherein large loads are applied to the lifting device as a result of a braking process based on the inertia of the load.
According to an advantageous development of the invention, the outer spindle nut is coupled to the inner spindle nut in a rotationally fixed manner. Therefore, the moment transmitted through the inner screw and the outer screw can be intercepted.
According to a preferred embodiment of the invention, the outer spindle nut is mounted so as to be movable in the axial direction relative to the inner spindle nut. Movement of the outer lead screw nut relative to the inner lead screw nut in the axial direction, which is referred to as lifting, is thus enabled.
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 has a first internal thread in a first orientation and the outer spindle nut has a second internal thread in 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, and vice versa. Thus, when the inner and outer lead screws are rotated relative to the inner and outer lead screw nuts, the lifting movement of the inner and outer lead screw nuts will be superimposed.
According to an advantageous development of the invention, the inner spindle comprises an inner toothing. In particular, the internal toothing serves for rotationally driving the inner spindle relative to the inner spindle nut via the pinion.
According to a preferred development of the invention, the lifting device comprises a motor and a pinion for rotationally driving the inner lead screw relative to the inner lead screw nut. The pinion gear meshes with the internal toothing of the internal spindle. The motor and pinion are arranged in a space-saving manner within the inner 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 a lifting device according to the invention.
According to an advantageous development of the invention, the unmanned vehicle further comprises a travel sensor for detecting the travel of the lifting device according to the invention, i.e. the movement of the outer spindle nut 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 device;
fig. 2 shows a cross-sectional view of the lifting device in a retracted state; and
fig. 3 shows a cross-sectional view of the lifting device in an extended state.
Detailed Description
Fig. 1 shows a top view of the lifting device 10 along a central axis M defining an axial direction. The lifting device 10 comprises an inner screw 4, an inner screw nut 5 rotatable relative to the inner screw 4, an outer screw 6 and an outer screw nut 7 rotatable relative to the outer screw 6. The outer spindle 6 has a flange 8, which in the present figure covers the inner spindle nut 5 and the remaining spindle 6.
The inner spindle 4, the inner spindle nut 5, the outer spindle 6, the outer spindle nut 7 and the flange 8 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 inner lead screw 4 includes an inner tooth portion 24. The lifting device 10 comprises a pinion 29 and a motor 28 for driving the pinion 29. The pinion 29 meshes with the internal teeth 24 of the internal screw 4. When the motor 28 drives the pinion 29, the inner lead screw 4 rotates about the central axis M relative to the inner lead screw nut 5. Thus, the motor 28 and the pinion 29 serve to rotationally drive the inner lead screw 4 relative to the inner lead screw nut 5.
Fig. 2 shows a sectional view of the lifting device 10 in the retracted state along the sectional line A-A in fig. 1. The inner spindle nut 5 is fixedly connected to a floor 35 of the unmanned truck by means of a plurality of bolts 30. The motor 28 is also fixedly connected to the base plate 35. The motor 28 and pinion 29 are not shown in this figure.
The inner lead screw 4 is screwed together with the inner lead screw nut 5 via a trapezoidal thread. Other types of threads are also conceivable here. The flange 8 of the outer spindle 6 is fixedly connected to the inner spindle 4 by means of a plurality of bolts 30. The inner spindle 4 is thus connected in a rotationally fixed manner, in particular rigidly, to the outer spindle 6. Alternatively, it is conceivable to connect the inner spindle 4 and the outer spindle 6 to one another by means of separate connecting rings.
The outer lead screw nut 7 is screwed with the outer lead screw 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 connected in a rotationally fixed manner, in particular rigidly, to the outer spindle nut 7. The support plate serves as a load receiving portion.
The outer lead screw nut 7 is connected to the floor 35 of the unmanned transport vehicle in a rotationally fixed manner. The outer spindle nut 7 is supported so as to be movable in the axial direction with respect to the floor 35 of the unmanned carrier. Therefore, the outer lead screw nut 7 is coupled with the inner lead screw nut 5 in a relatively non-rotatable manner, and is supported in a movable manner in the axial direction with respect to the inner lead screw nut 5.
The extension of the lifting device 10 is achieved by a rotational drive of the inner screw 4 relative to the inner screw nut 5 by means of a motor 28 and a pinion 29. Other types of drives are conceivable by which a rotational movement of the inner spindle 4 relative to the inner spindle nut 5 is produced.
The inner lead screw 4 is driven to rotate via the internal gear 24 by rotation of the pinion 29. This rotation produces a translational movement of the inner lead screw 4 in the axial direction by the threads of the inner lead screw nut 5 and of the inner lead screw 4. As the outer spindle 6 is fixedly connected to the inner spindle 4, a translational movement of the outer spindle 6 in the axial direction is thereby also achieved.
Since the outer spindle nut 7 is coupled to the inner spindle nut 5 in a rotationally fixed manner, the outer spindle 6 is rotated relative to the outer spindle nut 7. By means of the thread of the outer spindle nut 7 and of the outer spindle 6, a translational movement of the outer spindle nut 7 in the axial direction is thereby achieved.
Fig. 3 shows a sectional view of the lifting device 10 in the extended state along the sectional line A-A in fig. 1. 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 is adapted to this. 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 adapted to this.
The first internal thread 15 of the internal spindle nut 5 has a first orientation, the first internal thread 15 being configured as a right-hand thread in the present case. 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 in the present case. Thus, the first orientation and the second orientation are opposite to each other.
List of reference numerals:
4 inner screw
5 inner screw nut
6 outer screw
7 outer screw nut
8 flange
10-liter equipment
15 first internal thread
17 second internal thread
24 internal tooth part
28 motor
29 pinion gear
30 bolt
35 baseboard
A section line
M central axis
Claims (14)
1. Lifting device (10), in particular for a transport vehicle, comprising:
an inner lead screw (4);
an inner lead screw nut (5) rotatable relative to the inner lead 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 (4) is connected to the outer spindle (6) in a rotationally fixed manner, in particular rigidly.
2. Lifting device (10) according to claim 1, characterized in that the lifting device (10) comprises a bearing plate which is connected in a rotationally fixed manner, in particular rigidly, to the outer spindle nut (7).
3. Lifting device (10) according to any of the preceding claims, characterized in that the inner screw (4) is coaxially arranged in the outer screw (6).
4. Lifting device (10) according to any of the preceding claims, characterized in that the inner lead screw nut (5) is coaxially arranged in the outer lead screw nut (7).
5. Lifting device (10) according to any of the preceding claims, characterized in that an inner screw nut (5) is coaxially arranged in the outer screw (6).
6. Lifting device (10) according to any of the preceding claims, characterized in that,
an extension range of the inner screw rod (4) along the axial direction,
An extension range of the inner screw nut (5) along the axial direction,
Extension of the outer spindle (6) in the axial direction and
extension of the outer spindle nut (7) in the axial direction
Respectively smaller than the radius of the inner screw rod (4).
7. Lifting device (10) according to any of the preceding claims, characterized in that the outer screw nut (7) is coupled in a non-rotatable manner with the inner screw nut (5).
8. Lifting device (10) according to any of the preceding claims, characterized in that the outer screw nut (7) is supported in a movable manner in the axial direction relative to the inner screw nut (5).
9. Lifting device (10) according to any of the preceding claims, characterized in that the inner lead screw nut (5) has an inner thread (15) in the form of a trapezoidal thread and/or the outer lead screw nut (7) has an inner thread (17) in the form of a trapezoidal thread, respectively.
10. Lifting device (10) according to any of the preceding claims, characterized in that,
the inner spindle nut (5) has a first internal thread (15) in a first orientation,
the outer spindle nut (7) has a second internal thread (17) in a second orientation, wherein,
the first orientation and the second orientation are opposite to each other.
11. Lifting device (10) according to any of the preceding claims, characterized in that the inner screw (4) comprises an inner toothing (24).
12. Lifting device (10) according to claim 11, characterized in that the lifting device (10) comprises a motor (28) and a pinion (29) for rotationally driving the inner screw (4) relative to the inner screw nut (5), wherein the pinion (29) meshes with the inner toothing (24) of the inner screw (4).
13. Transport vehicle, in particular an unmanned transport vehicle, comprising a drive device, an accumulator for supplying power to the drive device, a control device for controlling the drive device and a lifting device (10) according to at least one of the preceding claims.
14. The transporter of claim 11, further comprising a travel sensor for detecting a travel of the lifting device (10).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102021001554.1A DE102021001554B3 (en) | 2021-03-25 | 2021-03-25 | lifting device and transport vehicle |
| DE102021001554.1 | 2021-03-25 | ||
| PCT/EP2022/056579 WO2022200109A1 (en) | 2021-03-25 | 2022-03-14 | Lifting device and transport vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117561212A true CN117561212A (en) | 2024-02-13 |
Family
ID=80775267
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202280014446.2A Pending CN117561212A (en) | 2021-03-25 | 2022-03-14 | Lifting equipment and transport vehicle |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP4313840A1 (en) |
| CN (1) | CN117561212A (en) |
| DE (2) | DE102021001554B3 (en) |
| WO (1) | WO2022200109A1 (en) |
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 (en) | 2003-10-21 | 2005-03-10 | Herbert Grüttner GmbH & Co. KG | Telescopic linear drive, has parallel spindles driven in opposite directions so that drive unit and telescopic tube move in same direction with respect to guide tube |
| DE102013019688B4 (en) | 2013-11-26 | 2022-05-05 | Sew-Eurodrive Gmbh & Co Kg | Transport system with vehicle for transporting a load handling device |
| CN209177916U (en) * | 2018-11-30 | 2019-07-30 | 嘉兴金鹏工具有限公司 | A kind of Multi-section retractable jack |
| CN113453930B (en) | 2019-02-12 | 2024-05-28 | 索尤若驱动有限及两合公司 | Mobile device |
| CN110844824A (en) * | 2019-11-15 | 2020-02-28 | 合肥森印科技有限公司 | N-stage electric telescopic device with large telescopic ratio and application thereof |
-
2021
- 2021-03-25 DE DE102021001554.1A patent/DE102021001554B3/en active Active
-
2022
- 2022-03-14 DE DE102022000882.3A patent/DE102022000882A1/en active Pending
- 2022-03-14 EP EP22710417.1A patent/EP4313840A1/en active Pending
- 2022-03-14 CN CN202280014446.2A patent/CN117561212A/en active Pending
- 2022-03-14 WO PCT/EP2022/056579 patent/WO2022200109A1/en active Application Filing
Also Published As
| Publication number | Publication date |
|---|---|
| DE102022000882A1 (en) | 2022-09-29 |
| DE102021001554B3 (en) | 2022-05-12 |
| WO2022200109A1 (en) | 2022-09-29 |
| EP4313840A1 (en) | 2024-02-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20140008905A1 (en) | Support device for work vehicles | |
| CN106005929B (en) | A kind of floor truck with lifting device and rotating device | |
| GB2115781A (en) | Apparatus for imparting linear and rotary movement to a movable member | |
| CN106458540B (en) | Lifting device on a lorry | |
| CN113840794A (en) | Actuator fault detection system and method | |
| CN2771171Y (en) | Lazy-arm type omnibearing storehouse loading-unloading machine | |
| CN107285232A (en) | A kind of mechanical lift mechanism | |
| WO2014012149A2 (en) | Jack and support device | |
| US20100140573A1 (en) | Lifting device | |
| CN106394671A (en) | Modular heavy-load universal driving wheel set | |
| CN107890964A (en) | A kind of auxiliary fabricating tools with spinfunction | |
| US20200384822A1 (en) | Damper and Spring Unit for a Vehicle Suspension Provided With an Electro-Mechanical Adjustment Device for Adjusting the Vertical Position of the Spring | |
| CN109676594A (en) | A kind of four axis robot of high-precision | |
| DE102008050235A1 (en) | Machine for rotationally aligning an adapter element with respect to a stationary machine part | |
| CN106379740B (en) | A kind of flexible mechanical device | |
| CN206029856U (en) | Lifting device for manipulator | |
| CN117561212A (en) | Lifting equipment and transport vehicle | |
| CN102601496A (en) | Rotating mechanism for welding gun of double-wire submerged arc welding machine | |
| CN108928386A (en) | Driving device applied to heavily loaded mobile robot | |
| CN108751001A (en) | A kind of elevating mechanism that high-precision bearing capacity is big | |
| CN117295679A (en) | Lifting device, lifting unit and transport vehicle | |
| EP2944601B1 (en) | Autonomous driverless transport vehicle and transport system | |
| US20110139536A1 (en) | Hydrostatic drive for a steering system | |
| DE102013009705A1 (en) | Linear drive, lift table and handset | |
| CN205114940U (en) | Low latitude transport vechicle |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |