EP3477018A1 - Levier creux à deux points - Google Patents

Levier creux à deux points Download PDF

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Publication number
EP3477018A1
EP3477018A1 EP18201908.3A EP18201908A EP3477018A1 EP 3477018 A1 EP3477018 A1 EP 3477018A1 EP 18201908 A EP18201908 A EP 18201908A EP 3477018 A1 EP3477018 A1 EP 3477018A1
Authority
EP
European Patent Office
Prior art keywords
cavity
lever
mast arm
point lever
point
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
Application number
EP18201908.3A
Other languages
German (de)
English (en)
Other versions
EP3477018B1 (fr
Inventor
Thomas JASNIEWICZ
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.)
Friedrich Wilhelm Schwing GmbH
Original Assignee
Friedrich Wilhelm Schwing GmbH
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 Friedrich Wilhelm Schwing GmbH filed Critical Friedrich Wilhelm Schwing GmbH
Publication of EP3477018A1 publication Critical patent/EP3477018A1/fr
Application granted granted Critical
Publication of EP3477018B1 publication Critical patent/EP3477018B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/62—Constructional features or details
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
    • E04G21/02—Conveying or working-up concrete or similar masses able to be heaped or cast
    • E04G21/04—Devices for both conveying and distributing
    • E04G21/0418—Devices for both conveying and distributing with distribution hose
    • E04G21/0445—Devices for both conveying and distributing with distribution hose with booms
    • E04G21/0463—Devices for both conveying and distributing with distribution hose with booms with boom control mechanisms, e.g. to automate concrete distribution
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/54—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes with pneumatic or hydraulic motors, e.g. for actuating jib-cranes on tractors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/62—Constructional features or details
    • B66C23/64—Jibs
    • B66C23/68—Jibs foldable or otherwise adjustable in configuration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/62—Constructional features or details
    • B66C23/64—Jibs
    • B66C23/70—Jibs constructed of sections adapted to be assembled to form jibs or various lengths
    • B66C23/701—Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic
    • B66C23/702—Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic with a jib extension boom
    • 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
    • B66F7/00—Lifting frames, e.g. for lifting vehicles; Platform lifts
    • B66F7/06—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported by levers for vertical movement
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
    • E04G21/02—Conveying or working-up concrete or similar masses able to be heaped or cast
    • E04G21/04—Devices for both conveying and distributing
    • E04G21/0418—Devices for both conveying and distributing with distribution hose
    • E04G21/0436—Devices for both conveying and distributing with distribution hose on a mobile support, e.g. truck
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
    • E04G21/02—Conveying or working-up concrete or similar masses able to be heaped or cast
    • E04G21/04—Devices for both conveying and distributing
    • E04G21/0418—Devices for both conveying and distributing with distribution hose
    • E04G21/0445—Devices for both conveying and distributing with distribution hose with booms
    • 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
    • B66F11/00—Lifting devices specially adapted for particular uses not otherwise provided for
    • B66F11/04—Lifting devices specially adapted for particular uses not otherwise provided for for movable platforms or cabins, e.g. on vehicles, permitting workmen to place themselves in any desired position for carrying out required operations
    • B66F11/042—Lifting devices specially adapted for particular uses not otherwise provided for for movable platforms or cabins, e.g. on vehicles, permitting workmen to place themselves in any desired position for carrying out required operations actuated by lazy-tongs mechanisms or articulated levers
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
    • E02F3/36—Component parts
    • E02F3/3604—Devices to connect tools to arms, booms or the like
    • E02F3/3609—Devices to connect tools to arms, booms or the like of the quick acting type, e.g. controlled from the operator seat
    • E02F3/3668—Devices to connect tools to arms, booms or the like of the quick acting type, e.g. controlled from the operator seat where engagement is effected by a mechanical lever or handle

Definitions

  • the invention relates to a mast arm for a large manipulator, wherein the mast arm has a pivotable about a vertical axis turntable and a plurality of Mastarmsegmenten, wherein the Mastarmsegmente are pivoted at articulated joints each about bending axes relative to an adjacent Mastarmsegment or the fifth wheel by means of a respective drive unit, wherein at least one the drive units is attached to a first Mastarmsegment and acts via a lever mechanism on a second Mastarmsegment or the turntable, wherein the lever mechanism comprises at least one two-point lever.
  • Mast arms for large manipulators are known from the prior art.
  • Such mast arms comprise at least two Mastarmsegmente which are articulated at articulated joints about each horizontal bending axes relative to an adjacent Mastarmsegment by means of a respective drive element, in particular by means of a hydraulic cylinder, in particular limited between a Einfaltwolf and a working position.
  • the weight or the mass of the mast arm should be reduced in relation to the reach of the mast, without reducing the buckling resistance of the two-point lever.
  • the two-point lever encloses at least one cavity, a weight saving can be achieved without reducing the buckling resistance of the two-point lever.
  • the outer dimension can be easily increased, causing the Area of inertia, so the buckling resistance of the lever increases at the same weight.
  • this can reduce the weight of the two-point lever, without affecting the buckling resistance.
  • the two-point levers on the Mastarmsegmenten are exposed to high tensile and compressive forces. In particular, by the pressure load and the resulting risk of buckling, the two-point lever are usually made very wide and thus have a high weight.
  • a pivoted during operation of the boom arm far from the turntable two-point lever therefore generates a high load torque on the large manipulator, which involves the risk of tilting the entire machine in itself.
  • large Abstüt matter to the vehicle frame are needed, which limits the installation of the vehicle or large manipulator at the site.
  • With a hollow two-point lever weight saving can be achieved, which ensures a high buckling resistance under pressure loads and reduces required Abstütrich even with a small wall thickness of the cavity surrounding the two-point lever.
  • the wall thickness of the hollow two-point lever must be adapted to the maximum acting tensile force, since in a tensile load, the cross-sectional area of the two-point lever between the tow points is crucial.
  • the two-point lever is assembled from a plurality of components, wherein the assembled components form the cavity.
  • the joining of several components to a two-point lever allows easy formation of a weight-saving cavity in the two-point lever.
  • the Components of the two-point lever can be connected to one another by means of a welding process.
  • the two-point lever has at least two bearing points, wherein the cavity is formed in a portion between the bearing points.
  • the bearing points of the two-point lever are preferably formed by bearing rings or bearing eyes through which a bolt engages and rotatably supports the two-point lever on Mastarmsegment, reversing lever or turntable. Between these bearing points, a cavity forming portion is formed in the two-point lever, which forms the weight-saving cavity.
  • the bearing rings or bearing eyes forming the bearing points are preferably formed as solid steel rings.
  • a particularly advantageous embodiment of the invention provides that the cavity-forming portion is formed as a tube.
  • a tube which is usually rolled but also drawn or welded, may have a round or angular cross-section.
  • a tube as a cavity forming portion between the bearing rings or bearing eyes allows only between the pipe and the bearing rings or bearing eyes welds to form the two-point lever are required, so that the vulnerabilities are limited in particular for tensile loads on the two-point lever.
  • the cavity-forming section has at least one cavity-forming cut-out.
  • the cavity forming portion may also have a burnout in which material for forming the cavity has been burned out of a component of the two-point lever. The formation of the cavity by milling or burnout is an easy way to reduce the weight of the two-point lever by a geometrically exactly predeterminable cavity.
  • the cavity forming portion has at least one cavity forming bore.
  • the embodiment is particularly advantageous in that the cavity-forming section comprises welded-on side panels.
  • the welding of side plates in the cavity-forming section increases the buckling resistance of the two-point lever under pressure load by a stiffening on the outer edges of the two-point lever.
  • a particularly advantageous embodiment of the invention provides that the welded-on side panels are formed continuously beyond the at least two bearing points. Due to the fact that the welded-in side panels project beyond the bearing points, in particular the bearing rings or bearing eyes, they are connected to one another by a cohesive, rolled material layer. To connect the side plates with the bearing rings or bearing eyes of the bearing points welds are advantageously provided.
  • the cavity-forming portion is formed from welded together sheets.
  • a cavity forming section can be produced very easily and inexpensively.
  • a box profile is made of four sheets placed against each other, which are connected to each other via welds.
  • the invention relates to a large manipulator having a previously described in more detail below and in the mast arm.
  • a mast arm according to the invention is shown.
  • the mast arm 1 is in FIG. 1 shown mounted on a large manipulator 2.
  • the representation according to FIG. 1 shows a large manipulator 2 with mast arm 1, which has a pivotable about a vertical axis 3 turntable 4 and a plurality of Mastarmsegmenten 5, 5a, 5b.
  • the Mastarmsegmente 5, 5a, 5b can be about buckles 6, 6a, 6b respectively about buckling axes relative to an adjacent Mastarmsegment 5, 5a, 5b or the turntable 4 by means of a respective drive unit 7, 7a, 7b pivot.
  • the mast arm 1 is shown folded, so that trained as a vehicle large manipulator 2 can drive in the road to the place of use.
  • the drive units 7, 7a, 7b are attached to the Mastarmsegmenten 5, 5a, 5b and act via lever mechanism 8 to another Mastarmsegment 5, 5a, 5b or the fifth wheel 4.
  • the lever mechanism 8 at least a two-point lever 9.
  • a two-point lever 9 is shown, which is subject to a high tensile load at the beginning of the unfolding process.
  • the two-point lever 9 shown is supported by bolts on the first Mastarmsegment 5 and on the lever 19, on which the first drive unit 7 acts.
  • the other articulated joints 6a, 6b include lever mechanism 8 on which two-point lever 9 are provided to transfer between the Mastarmsegment 5 and the lever 19 on the drive unit 7a, 7b tensile and compressive forces during folding and unfolding of the boom arm 1.
  • FIG. 2 shows a schematic view of a mast arm 1 according to the invention in one embodiment.
  • the mast arm 1 has a first 5 and a second 5a Mastarmsegment on an articulated joint 6 a about a horizontal Bending axis relative to the adjacent Mastarmsegment 5, 5 a by means of a drive unit 7, 7 a are pivotable.
  • the drive unit 7a which is preferably a hydraulic cylinder, is attached to the first Mastarmsegment 5 and acts via a lever mechanism 8 on the second Mastarmsegment 5a.
  • the lever mechanism 8 preferably has two levers, wherein a lever is designed as a two-point lever 9 and the other lever as a reversing lever 19.
  • a lever mechanism 8 is provided, on which the first drive unit 7 acts.
  • the arranged at the first articulated joint 6 lever mechanism 8, in addition to the lever 19 also has a two-point lever 9, which is exposed in the Mastarm ein shown the maximum pressure, since the first drive unit 7 on the lever 19 at the first articulated joint 6 in the position shown a strong Tensile load.
  • the two-point lever 9 is pivoted on the second articulated joint 6a through the mast arm 1 such that the weight of the two-point lever 9 exerts a large load moment on the turntable 4.
  • the load torque exerted by the two-point lever 9 can be reduced in the position shown, so that the supports 18 (FIG. FIG. 1 ) have to be extended far less so as to prevent the large manipulator 2 ( FIG. 1 ) to prevent.
  • the supports 18 ( FIG. 1 ) can therefore be shorter. This makes the installation of the large manipulator ( FIG. 1 ) also more flexible at the site as a smaller support distance is required to safely support the large manipulator 2.
  • FIG. 3a shows a schematic view of a two-point lever 9 according to the invention in a first embodiment.
  • a two-point lever 9 is shown, which is assembled from a plurality of components to form a cavity 10.
  • the assembled components are two bearing rings which form the bearing points 11, 12 of the two-point lever 9. Through these bearing rings 11, 12 is guided in each case a hinge pin to the two-point lever 9 on the lever 19 ( FIG.
  • FIG. 4a shows a further embodiment of a two-point lever 9 from a example rolled tube 13.
  • the portion 13 between the bearing rings, which form the bearing points 11, 12, is formed in the embodiment shown here by a square tube 13.
  • FIG. 4b it can be seen that the square tube 13 forms a cavity 10 between the two bearing points 11, 12.
  • the tube 13 with the other components, or the bearing rings 11, 12 of the two-point lever 9 preferably via welded joints, connected.
  • FIG. 5a shows a further embodiment of the two-point lever 9 according to the invention.
  • the two-point lever 9 is assembled from several components, wherein the assembled components form the cavity 10.
  • a cavity-forming cut-out 14 is provided in the cavity 10 forming portion 13.
  • the cavity 10 may also be made by burning out material from the component 20.
  • the one-piece middle component 20 of the two-point lever 9 has a corresponding cavity-forming cutout 14 or burnout 14.
  • the cavity forming portion 13 also includes welded side plates 16, 16a in FIG. 5b are shown separately.
  • the side plates 16 16a are formed continuously over the bearing points 11, 12 and thus provide additional stability for the two-point lever 9 thus formed FIG. 5a shown two-point lever 9, the side plates 16, 16a are welded to the middle component 20, so that the cavity-forming cutout 14 is covered by the side plates 16, 16a.
  • the side plates 16, 16 a increase the buckling stiffness of the two-point lever 9.
  • FIG. 6a shows a two-point lever 9 according to the invention in a further embodiment.
  • a central component 20 is provided which has a cavity-forming cutout 14 or burnout 14 in the region of the cavity-forming portion 13 between the bearing points 11, 12, as it also in FIG. 6b can be seen.
  • the welded to the central component 20 side plates 16 are constructed in several parts and have a web 21 and the bearing rings 11, 12 covering sheet metal rings 22.
  • the cover of the side plates 21, 22 increases the buckling resistance of the two-point lever 9 and prevents corrosion in the cavity-forming cutout 14 or Burnout 14 ago.
  • two-point lever 9 has a cavity 10, through which the two-point lever 9 clearly saves weight compared to levers made of solid material.
  • the two-point lever 9 shown here is composed of several components 11, 12, 16, 16a, 16b, 16c, wherein the components 11, 12, 16, 16a, 16b, 16c together include a cavity 10, which in a section 13 is formed between the bearing points 11, 12.
  • the cavity forming portion 13 is formed of welded sheets 16, 16a, 16b, 16c.
  • the cavity forming portion 13 has welded side plates 16, 16 a formed continuously over the at least two support points 11, 12.
  • the bearing rings 11, 12, which form the bearing points 11, 12, of the welded side plates 16, 16 a comprises, whereby a stable and kinking two-point lever 9 is given with reduced weight.
  • FIGS. 8a and 8b show a two-point lever 9 which is also composed of a plurality of components 11, 12, 16, 16a, 16b, 16c, wherein the components 11, 12, 16, 16a, 16b, 16c together form a cavity 10, which in a portion 13 between the Bearing points 11, 12 is formed.
  • the cavity forming portion 13 has welded side plates 16, 16 a formed continuously over the at least two support points 11, 12.
  • the bearing rings 11, 12, which form the bearing points 11, 12, of the welded side plates 16, 16 a comprises.
  • the cavity forming portion 13 includes further sheets 16b, 16c which are welded together with the side sheets 16, 16a to form an edge profile to form the cavity 10.
  • bearing rings 11, 12 of the bearing points 11, 12 have a projection 23 for screwing the rotation of the received in the bearing rings 11, 12 hinge pin (not shown).
  • This anti-rotation lock is in FIG. 8c shown in more detail.
  • the bearing ring 12 has a further projection 24 for positioning and Sch healthybadêt.
  • a rotation 25 of the bolt is indicated by dashed lines.
  • the further bearing ring 11 is designed accordingly.
  • FIGS. 9a, 9b and 9c show a two-point lever 9 according to the invention, wherein a cavity 10 is formed in a portion 13 between the bearing points 11, 12 by a plurality of cavity-forming holes 15 are provided in the section 13. These introduced holes 13 are in the sectional views according to the FIGS. 9b and 9c can be seen very well and run between the two bearing points 11, 12 along the cavity-forming portion 13th
  • FIGS. 10b and 10c show a two-point lever 9 according to the invention, wherein also here a cavity 10 is formed in a portion 13 between the bearing points 11, 12, for which purpose a cutout 14 in the cavity-forming portion 13 is provided.
  • This introduced cutout 14 is in the sectional views according to FIGS. 10b and 10c can be seen very well and extends between the two bearing points 11, 12 along the cavity-forming portion 13th
  • the representation according to FIG. 11 shows a two-point lever 9 according to the invention, which is designed in particular for a buckling load in lever level. Due to the shape of the lever 9, in particular of the cavity-forming portion 13, the lever 9 is particularly adapted to its buckling, so that the lever 9 can absorb a kink load in the lever plane with the least possible use of materials optimally. In this case, the two-point lever 9 acts like a buckling bar after Euler case 2.
  • FIG. 12 shows a two-point lever 9 according to the invention, which is designed in particular for a buckling load perpendicular to the lever plane.
  • the description for FIG. 11 Shall apply accordingly.
  • the two-point lever 9 acts like a buckling bar after Euler case 4.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Architecture (AREA)
  • Structural Engineering (AREA)
  • Civil Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Manipulator (AREA)
  • Vehicle Body Suspensions (AREA)
  • Jib Cranes (AREA)
EP18201908.3A 2017-10-26 2018-10-23 Levier creux à deux points Active EP3477018B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102017125145.6A DE102017125145A1 (de) 2017-10-26 2017-10-26 Hohler Zweipunkthebel

Publications (2)

Publication Number Publication Date
EP3477018A1 true EP3477018A1 (fr) 2019-05-01
EP3477018B1 EP3477018B1 (fr) 2021-04-07

Family

ID=63965311

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18201908.3A Active EP3477018B1 (fr) 2017-10-26 2018-10-23 Levier creux à deux points

Country Status (4)

Country Link
US (1) US20190127998A1 (fr)
EP (1) EP3477018B1 (fr)
CN (1) CN109707168A (fr)
DE (1) DE102017125145A1 (fr)

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CN115947246A (zh) * 2023-03-10 2023-04-11 山东力达智能车辆产业技术研究院有限公司 一种用于房车发送运输的拖挂起吊设备

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CN112267682A (zh) * 2020-09-28 2021-01-26 湖南响箭重工科技有限公司 一种新型臂架变幅机构及具有该臂架变幅机构的混凝土泵车

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CN202829373U (zh) * 2012-06-12 2013-03-27 北京市三一重机有限公司 一种臂架及工程机械
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CN103216096A (zh) * 2012-01-21 2013-07-24 徐工集团工程机械股份有限公司 伸缩布料杆机构以及布置有此种机构的混凝土泵车
WO2014032840A1 (fr) * 2012-08-31 2014-03-06 Putzmeister Engineering Gmbh Mât distributeur de béton
CN203613805U (zh) * 2013-11-12 2014-05-28 华菱星马汽车（集团）股份有限公司 一种泵车臂架机构及混凝土泵车
WO2016078706A1 (fr) 2014-11-20 2016-05-26 Schwing Gmbh Console avec engrenage à levier
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115947246A (zh) * 2023-03-10 2023-04-11 山东力达智能车辆产业技术研究院有限公司 一种用于房车发送运输的拖挂起吊设备

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Publication number Publication date
US20190127998A1 (en) 2019-05-02
DE102017125145A1 (de) 2019-05-02
CN109707168A (zh) 2019-05-03
EP3477018B1 (fr) 2021-04-07

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