EP3730450B1 - Carriage with initial stroke - Google Patents

Carriage with initial stroke Download PDF

Info

Publication number
EP3730450B1
EP3730450B1 EP20153519.2A EP20153519A EP3730450B1 EP 3730450 B1 EP3730450 B1 EP 3730450B1 EP 20153519 A EP20153519 A EP 20153519A EP 3730450 B1 EP3730450 B1 EP 3730450B1
Authority
EP
European Patent Office
Prior art keywords
frame
load
drive
receiving space
pallet truck
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.)
Active
Application number
EP20153519.2A
Other languages
German (de)
French (fr)
Other versions
EP3730450A1 (en
Inventor
Michael Schüler
Helmut Lohmann
Holger Brunckhorst
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.)
Jungheinrich AG
Original Assignee
Jungheinrich AG
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 Jungheinrich AG filed Critical Jungheinrich AG
Publication of EP3730450A1 publication Critical patent/EP3730450A1/en
Application granted granted Critical
Publication of EP3730450B1 publication Critical patent/EP3730450B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

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
    • B66F9/075—Constructional features or details
    • B66F9/07513—Details concerning the chassis
    • 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
    • B66F9/065—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 non-masted
    • 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
    • B66F9/07513—Details concerning the chassis
    • B66F9/07531—Battery compartments

Definitions

  • the invention relates to a lift truck with a drive part and a load part mounted on the drive part and adjustable in height relative to the drive part by an initial stroke, a drive frame of the drive part having components of the lift truck and the load part having a load frame and wheel arms extending from the load frame along a longitudinal axis of the vehicle , the wheel arms at their free ends each having at least one wheel for support on a floor.
  • Such lift trucks have an electric motor drive and are used to transport loads. Loads to be transported are picked up and lifted by the load part, in particular stored on a pallet.
  • the load part of the pallet truck can have a mast with which the load can be lifted to a height of several meters.
  • the wheel arms resting on a ground via their wheels can also be raised as part of the initial lift.
  • the initial stroke describes the stroke that the wheel arms and the load frame connected to the wheel arms can cover.
  • the entire load part can thus be adjusted in height relative to the drive part by the initial stroke.
  • the wheels of the wheel arms remain in contact with the ground; by raising the wheel arms, however, a higher ground clearance for the pallet truck is achieved. This means that the pallet truck can also negotiate unevenness.
  • the initial lift is also called the support arm lift.
  • the drive is arranged in the drive part and the battery supplying the drive with power is arranged in the load part.
  • the drive frame of the drive part includes, for example, the electric motor drive, support rollers, electrics, hydraulic unit and initial lift cylinder as components.
  • the load frame of the load part carries the Battery supplying the drive and, depending on the type of vehicle, a mast.
  • the load frame is usually movably connected to the drive frame via deflection levers and the lifting cylinders.
  • the lift truck is consequently supported by the support rollers arranged in the drive frame and with the wheels arranged at the end of the wheel arms on a ground.
  • the battery is arranged in the load frame in order to generate sufficient load pressure on the wheels of the wheel arms, particularly when the load part is raised relative to the drive steeply around the initial lift.
  • the vehicle is therefore relatively long, that is to say extends relatively far along the longitudinal axis of the vehicle. The result is poor maneuverability.
  • the battery must also be lifted when lifting the load part.
  • DE 199 34 993 A1 relate to pallet trucks with a drive part and a load part which is mounted in a height-adjustable manner on a drive part and which is articulated to the drive part via two parallel levers arranged above the lifting cylinders of the drive part.
  • DE 199 35 008 A1 discloses the features of the preamble of claim 1.
  • the drive part comprises a centrally arranged drive wheel, with receiving spaces for battery parts being provided on both sides of the drive wheel. As a result, support rollers should be able to be omitted. When the load part moves relative to the drive part, the components accommodated in the drive part may be damaged.
  • the invention is based on the object of providing a lift truck with an initial lift which is particularly compact while the components are safely accommodated.
  • a battery supplying a drive of the pallet truck is received in the drive frame and the drive frame has a receiving space which is closed with respect to the load frame and in which components of the drive part are arranged, the receiving space protruding into the load frame and the initial lift of the load part limited upwards.
  • the height of the load part can be adjusted relative to the drive part, as already explained at the beginning.
  • the load part in particular the load frame and the wheel arms adjoining the load frame, can be raised relative to the drive part.
  • the load part can be mounted on the drive part via lifting cylinders arranged in the drive frame and via deflection levers.
  • the initial stroke refers to the stroke by which the wheel arms of the load part in particular can be adjusted in height relative to the drive part.
  • the initial lift is therefore also called the support arm lift.
  • the drive frame carries components of the lift truck, such as an electric drive, one or more support rollers, electrics, a steering unit, a hydraulic unit with a hydraulic pump and a hydraulic tank and one or more initial lift cylinders.
  • the drive frame also carries the battery that supplies the electric drive with power.
  • the battery is no longer arranged in the load frame, but instead in the drive frame.
  • the battery can, in particular, have a cuboid shape and its longer side can be accommodated in the center of the drive frame parallel to the vehicle longitudinal axis, as will be explained later.
  • the drive frame can have a main space to which the receiving space protruding into the load frame is adjacent.
  • the drive frame and load frame are nested with one another. The receiving space protrudes into the load frame in such a way that the initial lift of the load part is still guaranteed, but the space available in the lift truck is ideally used.
  • the drive frame only limits the initial stroke with its receiving space, that is to say the stroke path that the load part can travel through as part of the initial stroke.
  • the initial stroke can be approx. 125 mm, for example.
  • a free space is consequently formed below the closed receiving space, within which the load frame can move.
  • the receiving space and in particular the entire drive frame is closed with respect to the load frame.
  • the components received in the receiving space and in the remaining part of the drive frame are thus well protected.
  • none of the components can be damaged. It can be provided that the load frame only engages in the drive frame via cylinder brackets for connection to the lifting cylinders.
  • the components of the drive part arranged in the receiving space protruding into the load frame include one or more of the following: hydraulic unit, in particular hydraulic pump and / or hydraulic tank, electrical components, in particular control components such as a vehicle controller.
  • these components which are arranged in a main space of the drive frame in known lift trucks, are accommodated in the receiving space of the drive frame extending into the load frame due to the displacement by the battery now accommodated in the drive frame according to the invention.
  • the battery itself is not arranged in the receiving space projecting into the load frame.
  • the drive frame can also have a main space adjoining the receiving space, wherein the battery can be arranged in the main space, in particular in the center.
  • the receiving space protruding into the load frame is box-shaped, comprising two vertical side walls, a rear wall connecting the side walls and perpendicular to the longitudinal axis of the vehicle, and a bottom wall closing the receiving space at the bottom, the bottom wall limiting the initial upward stroke of the load part.
  • the receiving space which receives the components displaced by the battery, is essentially box-shaped.
  • the receiving space can, however, be designed to be open opposite the rear wall, that is to say it can be open to the main space of the drive frame.
  • the receiving space can also be designed to be open at the top, that is to say opposite the bottom wall.
  • the side walls, the rear wall and the bottom wall here close off the receiving space from the load frame.
  • the bottom wall of the box-shaped receiving space can limit the upward initial stroke of the load part.
  • the load frame can come into contact with the bottom wall at a maximum initial stroke.
  • the maximum initial stroke can also be achieved without the load frame coming into contact with the bottom wall of the receiving space.
  • the box-shaped receiving space can in particular protrude into a correspondingly shaped receptacle of the load frame.
  • the load frame has a delimitation plate perpendicular to the longitudinal axis of the vehicle, a horizontal cross member, and mutually parallel webs extending upward from the cross member, so that the cross member and the webs form a U-shaped receptacle that is on the wheel arm side of the limit plate is limited.
  • Cross members, webs and delimitation plate can thus also form an essentially box-shaped receptacle, which is designed to be open at least towards the front, that is to say opposite the delimitation plate, in order to accommodate the receiving space of the drive frame.
  • the box-shaped receiving space of the drive frame and the U-shaped receiving space of the load frame can be designed to correspond to one another in such a way that the box-shaped receiving space can be received with an almost exact fit in the U-shaped receiving part of the load frame.
  • the box-shaped receiving space of the drive frame consequently protrudes into the U-shaped receiving part of the load frame, in particular up to the delimitation plate.
  • the available space is optimally used when nesting drive and load frames.
  • the box-shaped receiving space can protrude into the U-shaped receptacle in such a way that, apart from an initial displacement, it is completely filled by the box-shaped receiving space.
  • the webs of the U-shaped receptacle can run along the side walls of the receptacle space.
  • the initial stroke of the load part relative to the drive part can in particular be limited by the cross member of the U-shaped receptacle of the load frame and the bottom wall of the box-shaped receptacle space of the drive frame. For example, with a maximum initial stroke, the cross member can hit the bottom wall. The maximum initial stroke can, however, also be reached without such an impact occurring.
  • the nesting of the load frame and drive frame according to the invention can be achieved in a simple manner and with particularly good use of space.
  • frame walls of the drive frame can protrude so far in the direction of the load frame that only the delimitation plate of the load frame lies outside the drive frame.
  • the load frame only contributes to the length of the lift truck along the longitudinal axis of the vehicle with the wall thickness of its delimitation plate.
  • the vehicle is therefore particularly compact.
  • the box-shaped receiving space is closed off and protects against the U-shaped receptacle of the load frame the components accommodated in the receiving space securely even when the load frame is moved in the initial stroke.
  • the rear wall of the receiving space can extend parallel to the delimitation plate and / or in close proximity to it.
  • the drive frame has at least two lifting cylinders for lifting the load part, the lifting cylinders each engaging one of the webs of the load frame.
  • the lifting cylinders can in particular be arranged on opposite sides of the drive frame, preferably not in the receiving space protruding into the load frame.
  • the lifting cylinders can be connected to the load frame via cylinder holders arranged on the webs of the U-shaped receptacle of the load frame. The cylinder holders can protrude past the closed receiving space of the drive frame into the drive frame.
  • only one lifting cylinder can be provided, which can in particular be arranged centrally on the drive frame and can be in engagement with a cylinder holder arranged centrally, for example on the delimitation plate of the U-shaped receptacle.
  • the lifting cylinder can also be arranged in the receiving space protruding into the load frame.
  • the battery is cuboid and is arranged centrally in the drive frame in such a way that it extends with a longer side along the longitudinal axis of the vehicle.
  • the battery can be cuboid with a base area lying approximately parallel to the longitudinal axis of the vehicle, which is delimited by two longer sides and two shorter sides. The longer sides of the battery can extend along or parallel to the longitudinal axis of the vehicle.
  • the battery can thus be arranged longitudinally in the drive frame.
  • the battery is preferably not arranged in the receiving space of the drive frame that protrudes into the load frame.
  • the central arrangement refers to a position perpendicular to the longitudinal axis of the vehicle, horizontal transverse axis. Wheels in the drive frame may be provided on opposite sides of the battery along the transverse axis. At least one of the wheels can be controlled via a drive. A drive can therefore also be arranged to the side of the battery.
  • the lifting truck is a high-lift truck with a lifting frame arranged on the load frame.
  • the load frame can consequently have a lifting frame with which a load received on the load part can be raised not only by lifting the wheel arms in the initial lift but also beyond, for example to a height of several meters.
  • the lifting frame can have a lifting mast and forks extending from the lifting mast parallel to the wheel arms.
  • FIG. 1 a lift truck according to the invention with a drive part 10 and a load part 30 mounted on the drive part 10 and adjustable in height relative to the drive part by an initial stroke can be seen.
  • a drive frame 12 of the drive part 10 carries several components that are essential for the function of the lift truck.
  • An electric drive 14, a battery 16, electrical components 15 and a hydraulic unit 18 are arranged in the drive frame 12.
  • the drive frame 12 comprises a main space 12a and a receiving space 12b extending from the main space 12a in the direction of the load part 30.
  • the load part 30 comprises a load frame 32, as well as wheel arms 34 which extend from the load frame 32 along a vehicle longitudinal axis L and each have a wheel 36 at their free ends for supporting the lift truck on a floor.
  • the height of the load part 30 can be adjusted by an initial stroke with respect to the drive part 10, lifting cylinders 20 arranged in the main space 12a of the drive frame 12 acting on the load part 30, as will be explained later.
  • the load part 30 can thus be raised relative to the drive part 10, as in FIG Figure 2 evident.
  • the wheel arms 34 and the load frame 32 are thus raised from the ground, the wheels 36 with the ground in Stay in contact. In this way, greater ground clearance can be achieved and, in particular, uneven terrain can be traveled on.
  • the battery 16 is not arranged in the load part 30 but in the drive part 10. Due to the arrangement in the main space 12a of the drive frame 12, the battery 16 displaces components which are usually arranged there and which, according to the invention, are now arranged in the receiving space 12b. In the present exemplary embodiment, these are the electrical components 15 and the hydraulic unit 18. However, other components of the lifting truck can also be relocated there.
  • the receiving space 12b is box-shaped and comprises two vertical side walls 52 which run parallel to each other opposite one another, a rear wall 50 connecting the side walls 52 and perpendicular to the vehicle longitudinal axis L, and a bottom wall 56 that closes off the receiving space 12b at the bottom, as in particular in FIG Figure 3 to recognize.
  • the receiving space 12b is designed to be open in the direction of the main space 12a.
  • the receiving space 12b is also open at the top, opposite the bottom wall 56.
  • the receiving space 12b thus forms a box-shaped frame section of the drive frame 12 that projects into the load frame 32.
  • the load frame 32 comprises a delimitation plate 38 perpendicular to the vehicle longitudinal axis L, a horizontal cross member 40 and mutually parallel webs 42 extending upward from the cross member 40.
  • the webs 42 and the cross member 40 are on the side of the delimitation plate 38 facing the drive frame 12 and form a U-shaped receptacle which is delimited in the direction of the wheel arms 34 by the delimitation plate 38.
  • a box-shaped receptacle is thus also formed here, which is designed to receive the receiving space 12b.
  • the receiving space 12b and the U-shaped receptacle 40, 42 are designed to correspond to one another, that is to say they engage with one another with a relatively precise fit.
  • the load frame 32 has bearing sections 44 which are arranged below the cross member 40 and on which the wheel arms 34 are arranged.
  • the load frame 32 and thus the entire load part 30 are in engagement with the lifting cylinder 20 of the drive frame 12 via two cylinder holders 48 arranged at an upper end of the webs 42.
  • the load frame 32 and thus the entire load part 30 on an underside of the lifting truck is connected to the drive part 10 via lifting kinematics 60, as in particular in FIG Figure 4 as well as the Figures 7 and 8 evident.
  • the lifting kinematics 60 comprises for each wheel arm 34 a push rod 64 which extends along the respective wheel arm 34 and which is connected to the drive part at a first end via a reversing lever 62 on a bearing 63 arranged below the main space 12a of the drive frame 12 and which is connected to the drive part via a Storage 66 arranged at the second end is articulated to bearing sections 65 of the wheel arms 34.
  • the drive frame 12 In its main space 12a, the drive frame 12 has a battery receptacle 24 arranged almost in the middle, as in particular in FIG Figure 3 to recognize.
  • the cuboid battery 16 is received longitudinally in this battery receptacle 24, that is, its long sides extend parallel to the vehicle longitudinal axis L. In relation to a horizontal transverse axis perpendicular to the vehicle longitudinal axis L, the battery 16 is thus almost centrally located in the main space 12a.
  • a drive carrier 26 and a support wheel carrier 28 are formed on opposite sides of the battery receiving space 24.
  • the drive carrier 26 accommodates the drive 14, as well as a wheel moved by the drive.
  • the support wheel carrier 28 accommodates a support wheel.
  • the box-shaped receiving space 12b extends from the main space 12a of the drive frame 12.
  • the box-shaped receiving space 12b protrudes into the U-shaped Receiving 46 of the load frame 32 into it, the webs 42 being received in free spaces which are each formed between the side walls 52 of the receiving space 12b and the side walls 52 of the opposite frame walls 13 of the drive frame 12.
  • the frame walls 13 protrude so far in the direction of the load frame 32 that only the limiting plate 38 of the load frame lies outside the drive frame.
  • the load frame 32 thus only contributes to the length of the lift truck along the longitudinal axis of the vehicle with the wall thickness of its delimitation plate 38.
  • the vehicle is therefore particularly compact.
  • the cross member 40 of the U-shaped receptacle 46 of the load frame 32 is arranged below the receiving space 12b, as in particular in FIG Figures 7 and 8 to recognize.
  • the load part 30 is in the lowered state.
  • an initial displacement space 70 is formed between the receiving space 12b and the cross member 40 of the load frame 32.
  • the receiving space 12b extends as far as the delimitation plate 38 of the load frame.
  • Load frame 32 and drive frame 12 are thus nested in one another.
  • the receiving space 12b protrudes into the load frame 32 in such a way that the initial stroke of the load part 30 is limited upward. This limitation is realized by the cross member 40, as in FIG Figure 8 evident.
  • the cross member 40 traverses the initial stroke space 70 and approaches the bottom wall 56 of the receiving space 12b.
  • An upper end of the load frame 32 extends beyond the drive frame 12. This initial stroke is achieved by extending the cylinder piston 29 out of the lifting cylinder 20.
  • the deflection levers 62 are pivoted about their bearing 63 and the wheel arms 34 are thus in the position shown in FIG Figure 8 clearly lifted from the ground.
  • the main space 12a of the drive frame is closed off from the cross member 40 via an intermediate wall 13 and the receiving space 12b via the adjoining bottom wall 56.
  • the available installation space is ideally used.
  • the U-shaped receptacle 46 in the load frame 32 is essentially completely filled by the receiving space 12b protruding into this receptacle, with only the initial displacement 70 remaining in order to enable the initial displacement to be passed through.
  • the receiving space 12b limits the initial stroke of the load part 32 upwards, that is to say is arranged above the initial stroke volume 70. Due to this nesting of the drive frame and load frame, despite the displacement of some components of the lift truck from the drive frame by the battery, the lift truck can be made more compact. In particular, a longitudinal extension of the lift truck along the vehicle longitudinal axis L can be reduced.
  • the receiving space 12b is closed with respect to the load frame 32, as in particular in FIG Figures 5 and 6 clearly visible.
  • the main space 12a is also closed off from the load frame 32, only the cylinder holders 48 protrude into it. A clear separation is thus achieved between the load frame and the drive frame, which in particular leads to good protection of the components arranged in the drive frame.
  • Figure 9 shows a load frame 32 'which differs from the previously explained load frame only in its cylinder holder.
  • a lifting truck can be seen with a lifting frame 80 arranged on the load frame 32 and forks 82 extending from the lifting frame 80 parallel to the wheel arms 34 Meters.
  • the in Figure 10 The apparent pallet truck is therefore a high-lift truck.
  • the nesting of the drive frame and load frame according to the invention is of particular advantage.

Description

Die Erfindung betrifft einen Hubwagen mit einem Antriebsteil und einem an dem Antriebsteil gelagerten und relativ zu dem Antriebsteil um einen Initialhub höhenverstellbaren Lastteil, wobei ein Antriebsrahmen des Antriebsteils Komponenten des Hubwagens aufweist und das Lastteil einen Lastrahmen sowie sich von dem Lastrahmen entlang einer Fahrzeuglängsachse forterstreckende Radarme aufweist, wobei die Radarme an ihren freien Enden über jeweils mindestens ein Rad zum Abstützen an einem Boden verfügen.The invention relates to a lift truck with a drive part and a load part mounted on the drive part and adjustable in height relative to the drive part by an initial stroke, a drive frame of the drive part having components of the lift truck and the load part having a load frame and wheel arms extending from the load frame along a longitudinal axis of the vehicle , the wheel arms at their free ends each having at least one wheel for support on a floor.

Derartige Hubwagen verfügen über einen elektromotorischen Antrieb und dienen dem Transport von Lasten. Zu transportierende Lasten werden insbesondere auf einer Palette lagernd durch das Lastteil aufgenommen und angehoben. Das Lastteil des Hubwagens kann über ein Hubgerüst verfügen, mit welchem die Last in eine Höhe von mehreren Metern gehoben werden kann. Auch die über ihre Räder auf einem Untergrund auflagernden Radarme können jedoch im Rahmen des Initialhubs angehoben werden. Der Initialhub bezeichnet den Hubweg, welchen die Radarme und der mit den Radarmen verbundene Lastrahmen zurücklegen können. Das gesamte Lastteil kann somit relativ zu dem Antriebsteil um den Initialhub in der Höhe verstellt werden. Die Räder der Radarme bleiben hierbei in Kontakt mit dem Boden; durch Anheben der Radarme wird jedoch eine höhere Bodenfreiheit für den Hubwagen erreicht. Somit kann der Hubwagen auch Unebenheiten gut überwinden. Der Initialhub wird auch Radarmhub genannt.Such lift trucks have an electric motor drive and are used to transport loads. Loads to be transported are picked up and lifted by the load part, in particular stored on a pallet. The load part of the pallet truck can have a mast with which the load can be lifted to a height of several meters. However, the wheel arms resting on a ground via their wheels can also be raised as part of the initial lift. The initial stroke describes the stroke that the wheel arms and the load frame connected to the wheel arms can cover. The entire load part can thus be adjusted in height relative to the drive part by the initial stroke. The wheels of the wheel arms remain in contact with the ground; by raising the wheel arms, however, a higher ground clearance for the pallet truck is achieved. This means that the pallet truck can also negotiate unevenness. The initial lift is also called the support arm lift.

Bei bekannten elektromotorisch angetriebenen Hubwagen ist der Antrieb im Antriebsteil und die den Antrieb mit Leistung versorgende Batterie im Lastteil angeordnet. Der Antriebsrahmen des Antriebsteils umfasst als Komponenten beispielsweise den elektromotorischen Antrieb, Stützrollen, Elektrik, Hydraulikaggregat sowie Initialhubzylinder. Der Lastrahmen des Lastteils trägt die den Antrieb mit Leistung versorgende Batterie sowie je nach Fahrzeugart ein Hubgerüst. Der Lastrahmen ist zumeist über Umlenkhebel sowie die Hubzylinder beweglich mit dem Antriebsrahmen verbunden. Der Hubwagen lagert folglich mit den im Antriebsrahmen angeordneten Stützrollen sowie mit den endseitig der Radarme angeordneten Rädern auf einem Untergrund auf. Um insbesondere beim Anheben des Lastteils relativ zum Antrieb steil um den Initialhub einen ausreichenden Lastdruck auf die Räder der Radarme zu erzeugen, wird die Batterie in dem Lastrahmen angeordnet. In nachteiliger Weise ist das Fahrzeug somit jedoch relativ lang, erstreckt sich also relativ weit entlang der Fahrzeuglängsachse. Das Resultat ist eine schlechte Manövrierfähigkeit. Zudem muss beim Anheben des Lastteils auch die Batterie mitgehoben werden.In known electric motor-driven lift trucks, the drive is arranged in the drive part and the battery supplying the drive with power is arranged in the load part. The drive frame of the drive part includes, for example, the electric motor drive, support rollers, electrics, hydraulic unit and initial lift cylinder as components. The load frame of the load part carries the Battery supplying the drive and, depending on the type of vehicle, a mast. The load frame is usually movably connected to the drive frame via deflection levers and the lifting cylinders. The lift truck is consequently supported by the support rollers arranged in the drive frame and with the wheels arranged at the end of the wheel arms on a ground. The battery is arranged in the load frame in order to generate sufficient load pressure on the wheels of the wheel arms, particularly when the load part is raised relative to the drive steeply around the initial lift. However, disadvantageously, the vehicle is therefore relatively long, that is to say extends relatively far along the longitudinal axis of the vehicle. The result is poor maneuverability. In addition, the battery must also be lifted when lifting the load part.

DE 20 2006 000 552 U1 beschreibt einen Niederhubwagen mit einem eine Antriebseinheit tragenden Antriebsteil und einem gegenüber dem Antriebsteil um einen Initialhub höhenverstellbaren Lastteil, welches ein Batteriegehäuse aufweist, das oberhalb der Antriebseinheit angeordnet ist. Auch hier wird bei Durchfahren des Initialhubs eine in dem Batteriegehäuse aufgenommene Batterie gemeinsam mit dem Lastteil in der Höhe verstellt. DE 20 2006 000 552 U1 describes a pallet truck with a drive part carrying a drive unit and a load part which is adjustable in height by an initial stroke relative to the drive part and which has a battery housing which is arranged above the drive unit. Here, too, when the initial stroke is passed through, a battery accommodated in the battery housing is adjusted in height together with the load part.

DE 199 35 008 A1 bzw. DE 199 34 993 A1 betreffen Niederhubwagen mit einem Antriebsteil und einem an einem Antriebsteil höhenverstellbar gelagerten Lastteil, welches über zwei parallele, oberhalb der Hubzylinder des Antriebsteils angeordnete Hebel an dem Antriebsteil angelenkt ist. DE 199 35 008 A1 offenbart die Merkmale des Oberbegriffs des Anspruchs 1. Das Antriebsteil umfasst ein mittig angeordnetes Antriebsrad, wobei beidseitig des Antriebsrads Aufnahmeräume für Batterieteile vorgesehen sind. Hierdurch sollen Stützrollen in Fortfall kommen können. Bei einer Bewegung des Lastteils relativ zu dem Antriebsteil kann es unter Umständen zu einer Beschädigung der in dem Antriebsteil aufgenommenen Komponenten kommen. DE 199 35 008 A1 or. DE 199 34 993 A1 relate to pallet trucks with a drive part and a load part which is mounted in a height-adjustable manner on a drive part and which is articulated to the drive part via two parallel levers arranged above the lifting cylinders of the drive part. DE 199 35 008 A1 discloses the features of the preamble of claim 1. The drive part comprises a centrally arranged drive wheel, with receiving spaces for battery parts being provided on both sides of the drive wheel. As a result, support rollers should be able to be omitted. When the load part moves relative to the drive part, the components accommodated in the drive part may be damaged.

Der Erfindung liegt die Aufgabe zugrunde, einen Hubwagen mit Initialhub bereitzustellen, der bei sicherer Unterbringung der Komponenten besonders kompakt ist.The invention is based on the object of providing a lift truck with an initial lift which is particularly compact while the components are safely accommodated.

Die Erfindung löst die Aufgabe durch einen Hubwagen gemäß Anspruch 1. Vorteilhafte Ausgestaltungen sind Gegenstand der Unteransprüche, der Beschreibung sowie der Figuren.The invention solves the problem by means of a lift truck according to claim 1. Advantageous configurations are the subject matter of the subclaims, the description and the figures.

Bei dem erfindungsgemäßen Hubwagen der eingangs genannten Art ist eine einen Antrieb des Hubwagens versorgende Batterie in dem Antriebsrahmen aufgenommen und der Antriebsrahmen weist einen gegenüber dem Lastrahmen geschlossenen Aufnahmeraum auf, in welchem Komponenten des Antriebsteils angeordnet sind, wobei der Aufnahmeraum in den Lastrahmen hineinragt und den Initialhub des Lastteils nach oben begrenzt.In the pallet truck according to the invention of the type mentioned at the beginning, a battery supplying a drive of the pallet truck is received in the drive frame and the drive frame has a receiving space which is closed with respect to the load frame and in which components of the drive part are arranged, the receiving space protruding into the load frame and the initial lift of the load part limited upwards.

Bei dem erfindungsgemäßen Hubwagen kann das Lastteil relativ zu dem Antriebsteil in der Höhe verstellt werden, wie bereits eingangs erläutert. Das Lastteil, insbesondere also der Lastrahmen sowie die an den Lastrahmen anschließende Radarme, können relativ zum Antriebsteil angehoben werden. Das Lastteil kann hierbei über in dem Antriebsrahmen angeordnete Hubzylinder sowie über Umlenkhebel an dem Antriebsteil gelagert sein. Der Initialhub bezeichnet den Hubweg, um welchen insbesondere die Radarme des Lastteils relativ zum Antriebsteil in der Höhe verstellt werden können. Wie eingangs bereits erwähnt, bleiben die Räder der Radarme hierbei in Kontakt mit einem Untergrund, es wird also durch den Initialhub die Bodenfreiheit des Hubwagens verändert. Der Initialhub wird daher auch Radarmhub genannt. Der Antriebsrahmen trägt Komponenten des Hubwagens, wie beispielsweise einen elektrischen Antrieb, eine oder mehrere Stützrollen, Elektrik, eine Lenkeinheit, ein Hydraulikaggregat mit Hydraulikpumpe und mit einem Hydrauliktank sowie einen oder mehrere Initialhubzylinder.In the case of the lift truck according to the invention, the height of the load part can be adjusted relative to the drive part, as already explained at the beginning. The load part, in particular the load frame and the wheel arms adjoining the load frame, can be raised relative to the drive part. The load part can be mounted on the drive part via lifting cylinders arranged in the drive frame and via deflection levers. The initial stroke refers to the stroke by which the wheel arms of the load part in particular can be adjusted in height relative to the drive part. As already mentioned at the beginning, the wheels of the wheel arms remain in contact with a ground, so the ground clearance of the lift truck is changed by the initial lift. The initial lift is therefore also called the support arm lift. The drive frame carries components of the lift truck, such as an electric drive, one or more support rollers, electrics, a steering unit, a hydraulic unit with a hydraulic pump and a hydraulic tank and one or more initial lift cylinders.

Erfindungsgemäß trägt der Antriebsrahmen zudem auch die den elektrischen Antrieb mit Leistung versorgende Batterie. Im Gegensatz zum eingangs erwähnten Stand der Technik wird die Batterie also nicht länger im Lastrahmen, sondern stattdessen im Antriebsrahmen angeordnet. Die Batterie kann insbesondere quaderförmig ausgebildet sein und mit ihrer längeren Seite parallel zur Fahrzeuglängsachse mittig in dem Antriebsrahmen aufgenommen werden, wie später noch erläutert wird. Durch das Verlagern der Batterien von dem Lastrahmen in den Antriebsrahmen kann der Lastrahmen wesentlich kompakter ausgeführt werden. Insbesondere kann die Längserstreckung des Lastrahmens entlang der Fahrzeuglängsachse reduziert werden.According to the invention, the drive frame also carries the battery that supplies the electric drive with power. In contrast to the prior art mentioned at the beginning, the battery is no longer arranged in the load frame, but instead in the drive frame. The battery can, in particular, have a cuboid shape and its longer side can be accommodated in the center of the drive frame parallel to the vehicle longitudinal axis, as will be explained later. By moving the batteries from the load frame to the drive frame, the load frame can be made much more compact. In particular, the longitudinal extension of the load frame along the longitudinal axis of the vehicle can be reduced.

Durch Aufnahme der Batterien im Antriebsrahmen werden dort zuvor angeordnete Komponenten verdrängt. Diese Komponenten werden erfindungsgemäß nun in dem Aufnahmeraum angeordnet, der sich als Teil des Antriebsrahmens in Richtung des Lastrahmens erstreckt und derart in den Lastrahmen hineinragt, dass der Aufnahmeraum den Initialhub des Lastteils nach oben begrenzt. Der Antriebsrahmen kann einen Hauptraum aufweisen, an welchem der in den Lastrahmen hineinragende Aufnahmeraum angrenzt. Durch das Hineinragen des Aufnahmeraums in den Lastrahmen werden Antriebsrahmen und Lastrahmen miteinander verschachtelt. Der Aufnahmeraum ragt derart in den Lastrahmen hinein, dass der Initialhub des Lastteils weiterhin gewährleistet ist, jedoch der im Hubwagen zur Verfügung stehende Platz ideal genutzt wird. Der Antriebsrahmen begrenzt lediglich mit seinem Aufnahmeraum den Initialhub, also den Hubweg, den das Lastteil im Rahmen des Initialhubs durchfahren kann. Der Initialhub kann beispielsweise bei ca. 125 mm liegen. Unterhalb des geschlossenen Aufnahmeraums wird folglich ein Freiraum ausgebildet, innerhalb dessen sich der Lastrahmen bewegen kann. Durch die so erreichte Verschachtelung von Antriebsrahmen und Lastrahmen kann der Hubwagen kompakter ausgeführt werden, insbesondere dessen Erstreckung entlang der Fahrzeuglängsachse verringert werden. Wird das Lastteil des erfindungsgemäßen Hubwagens im Initialhub relativ zum Antriebsteil verstellt, wird die Batterie nicht mitbewegt, da diese im Antriebsrahmen angeordnet ist. Dies ist effizienter. Es kann vorgesehen sein, dass der Lastrahmen aus relativ massiven Bauteilen ausgeführt wird, um den durch die Verlagerung der Batterie in den Antriebsrahmen erfolgten Gewichtsverlust zumindest teilweise auszugleichen. Somit kann weiterhin ein nötiger Lastraddruck auf die Räder der Lastarme erreicht werden. Dies läuft der kompakten Bauweise jedoch nicht zuwider.By accommodating the batteries in the drive frame, components previously arranged there are displaced. According to the invention, these components are now arranged in the receiving space which extends as part of the drive frame in the direction of the load frame and protrudes into the load frame in such a way that the receiving space limits the upward initial stroke of the load part. The drive frame can have a main space to which the receiving space protruding into the load frame is adjacent. As the receiving space protrudes into the load frame, the drive frame and load frame are nested with one another. The receiving space protrudes into the load frame in such a way that the initial lift of the load part is still guaranteed, but the space available in the lift truck is ideally used. The drive frame only limits the initial stroke with its receiving space, that is to say the stroke path that the load part can travel through as part of the initial stroke. The initial stroke can be approx. 125 mm, for example. A free space is consequently formed below the closed receiving space, within which the load frame can move. As a result of the nesting of the drive frame and load frame achieved in this way, the lift truck can be made more compact, in particular its extension along the longitudinal axis of the vehicle can be reduced. If the load part of the pallet truck according to the invention is adjusted relative to the drive part in the initial stroke, the battery is not moved because it is located in the drive frame. This is more efficient. Provision can be made for the load frame to be made from relatively massive components in order to at least partially compensate for the weight loss caused by relocating the battery into the drive frame. In this way, a necessary load wheel pressure can still be achieved on the wheels of the load arms. However, this does not run counter to the compact design.

Der Aufnahmeraum und insbesondere der gesamte Antriebsrahmen ist dabei gegenüber dem Lastrahmen geschlossen. Die in dem Aufnahmeraum sowie in dem restlichen Teil des Antriebsrahmens aufgenommen Komponenten sind somit gut geschützt. Insbesondere kann bei der Relativbewegung des Lastteils zu dem Antriebsteil um den Initialhub keine der Komponenten beschädigt werden. Es kann vorgesehen sein, dass der Lastrahmen lediglich über Zylinderhalterungen in den Antriebsrahmen eingreift zur Verbindung mit den Hubzylindern.The receiving space and in particular the entire drive frame is closed with respect to the load frame. The components received in the receiving space and in the remaining part of the drive frame are thus well protected. In particular, when the load part moves relative to the drive part by the initial stroke, none of the components can be damaged. It can be provided that the load frame only engages in the drive frame via cylinder brackets for connection to the lifting cylinders.

Nach einer Ausgestaltung umfassen die in dem in den Lastrahmen hineinragenden Aufnahmeraum angeordneten Komponenten des Antriebsteils eines oder mehrere der folgenden: Hydraulikaggregat, insbesondere Hydraulikpumpe und/oder Hydrauliktank, elektrische Komponenten, insbesondere Steuerkomponenten wie eine Fahrzeugsteuerung. Diese bei bekannten Hubwagen in einem Hauptraum des Antriebsrahmens angeordneten Komponenten werden nach dieser Ausgestaltung aufgrund der Verdrängung durch die nun erfindungsgemäß im Antriebsrahmen aufgenommene Batterie in den sich in den Lastrahmen erstreckenden Aufnahmeraum des Antriebsrahmens aufgenommen. Nach einer Ausgestaltung ist die Batterie selbst nicht in dem in den Lastrahmen hineinragenden Aufnahmeraum angeordnet. Der Antriebsrahmen kann neben dem Aufnahmeraum auch einen an den Aufnahmeraum anschließenden Hauptraum aufweisen, wobei die Batterie in dem Hauptraum angeordnet sein kann, insbesondere mittig.According to one embodiment, the components of the drive part arranged in the receiving space protruding into the load frame include one or more of the following: hydraulic unit, in particular hydraulic pump and / or hydraulic tank, electrical components, in particular control components such as a vehicle controller. According to this embodiment, these components, which are arranged in a main space of the drive frame in known lift trucks, are accommodated in the receiving space of the drive frame extending into the load frame due to the displacement by the battery now accommodated in the drive frame according to the invention. According to one embodiment, the battery itself is not arranged in the receiving space projecting into the load frame. In addition to the receiving space, the drive frame can also have a main space adjoining the receiving space, wherein the battery can be arranged in the main space, in particular in the center.

Nach einer Ausgestaltung ist der in den Lastrahmen hineinragende Aufnahmeraum kastenförmig ausgebildet, umfassend zwei vertikale Seitenwände, eine die Seitenwände verbindende, senkrecht zur Fahrzeuglängsachse stehende Rückwand sowie eine den Aufnahmeraum nach unten abschließende Bodenwand, wobei die Bodenwand den Initialhub des Lastteils nach oben begrenzt. Nach dieser Ausgestaltung ist der Aufnahmeraum, der die durch die Batterie verdrängten Komponenten aufnimmt, im Wesentlichen kastenförmig ausgebildet. Der Aufnahmeraum kann jedoch gegenüberliegend der Rückwand offen ausgebildet sein, kann also zu dem Hauptraum des Antriebsrahmens hin offen sein. Auch kann der Aufnahmeraum nach oben, also gegenüberliegend der Bodenwand offen ausgebildet sein. Die Seitenwände, die Rückwand sowie die Bodenwand schließen hierbei den Aufnahmeraum gegenüber dem Lastrahmen ab. Die in dem Aufnahmeraum angeordneten Komponenten sind somit geschützt. Insbesondere durch die Bodenwand des kastenförmigen Aufnahmeraums kann der Initialhub des Lastteils nach oben begrenzt sein. Beispielsweise kann der Lastrahmen mit der Bodenwand bei einem maximalen Initialhub in Anlage kommen. Der maximale Initialhub kann jedoch auch erreicht sein, ohne dass der Lastrahmen mit der Bodenwand des Aufnahmeraums in Kontakt tritt. Der kastenförmige Aufnahmeraum kann insbesondere in eine korrespondierend geformte Aufnahme des Lastrahmens hineinragen.According to one embodiment, the receiving space protruding into the load frame is box-shaped, comprising two vertical side walls, a rear wall connecting the side walls and perpendicular to the longitudinal axis of the vehicle, and a bottom wall closing the receiving space at the bottom, the bottom wall limiting the initial upward stroke of the load part. According to this embodiment, the receiving space, which receives the components displaced by the battery, is essentially box-shaped. The receiving space can, however, be designed to be open opposite the rear wall, that is to say it can be open to the main space of the drive frame. The receiving space can also be designed to be open at the top, that is to say opposite the bottom wall. The side walls, the rear wall and the bottom wall here close off the receiving space from the load frame. The components arranged in the receiving space are thus protected. In particular, the bottom wall of the box-shaped receiving space can limit the upward initial stroke of the load part. For example, the load frame can come into contact with the bottom wall at a maximum initial stroke. However, the maximum initial stroke can also be achieved without the load frame coming into contact with the bottom wall of the receiving space. The box-shaped receiving space can in particular protrude into a correspondingly shaped receptacle of the load frame.

So weist der Lastrahmen nach einer weiteren Ausgestaltung eine senkrecht zur Fahrzeuglängsachse stehende Begrenzungsplatte, einen horizontalen Querträger und sich von dem Querträger nach oben forterstreckende, zueinander parallele Stege auf, sodass der Querträger und die Stege eine U-förmige Aufnahme bilden, die radarmseitig von der Begrenzungsplatte begrenzt ist. Querträger, Stege und Begrenzungsplatte können somit ebenfalls eine im Wesentlichen kastenförmige Aufnahme bilden, die zumindest nach vorn, also gegenüberliegend der Begrenzungsplatte offen ausgebildet ist, um den Aufnahmeraum des Antriebsrahmens aufzunehmen.Thus, according to a further embodiment, the load frame has a delimitation plate perpendicular to the longitudinal axis of the vehicle, a horizontal cross member, and mutually parallel webs extending upward from the cross member, so that the cross member and the webs form a U-shaped receptacle that is on the wheel arm side of the limit plate is limited. Cross members, webs and delimitation plate can thus also form an essentially box-shaped receptacle, which is designed to be open at least towards the front, that is to say opposite the delimitation plate, in order to accommodate the receiving space of the drive frame.

Der kastenförmige Aufnahmeraum des Antriebsrahmens und die U-förmige Aufnahme des Lastrahmens können derart korrespondierend zueinander ausgebildet sein, dass der kastenförmige Aufnahmeraum annähernd passgenau in die U-förmige Aufnahme des Lastrahmens aufgenommen werden kann. Nach einer Ausgestaltung ragt der kastenförmige Aufnahmeraum des Antriebsrahmens folglich in die U-förmige Aufnahme des Lastrahmens hinein, insbesondere bis zu der Begrenzungsplatte. Somit wird der zur Verfügung stehende Platz bei der Verschachtelung von Antriebs- und Lastrahmen optimal genutzt. Insbesondere kann der kastenförmige Aufnahmeraum derart in die U-förmige Aufnahme hineinragen, dass diese abgesehen von einem Initialhubraum vollständig durch den kastenförmigen Aufnahmeraum ausgefüllt wird. Lediglich der Initialhubraum sollte weiterhin als Freiraum in der U-förmigen Aufnahme des Lastrahmens vorgesehen sein, um den Initialhub in der erläuterten Weise zu ermöglichen. Bei einer Höhenverstellung des Lastteils entlang des Initialhubs können dabei die Stege der U-förmigen Aufnahme an den Seitenwänden des Aufnahmeraums entlanglaufen. Der Initialhub des Lastteils relativ zu dem Antriebsteil kann insbesondere durch den Querträger der U-förmigen Aufnahme des Lastrahmens und die Bodenwand des kastenförmigen Aufnahmeraums des Antriebsrahmens begrenzt sein. Beispielsweise kann bei einem maximalen Initialhub der Querträger an der Bodenwand anstoßen. Der maximale Initialhub kann jedoch auch erreicht sein, ohne dass es zu einem solchen Anstoßen kommt. Durch diese Ausgestaltungen kann in einfacher Weise und bei besonders guter Platznutzung die erfindungsgemäße Verschachtelung von Lastrahmen und Antriebsrahmen erreicht werden. Insbesondere können Rahmenwände des Antriebsrahmens derart weit in Richtung des Lastrahmens ragen, dass nur die Begrenzungsplatte des Lastrahmens außerhalb des Antriebsrahmens liegt. Somit trägt der Lastrahmen nur mit der Wandstärke seiner Begrenzungsplatte zu der Länge des Hubwagens entlang der Fahrzeuglängsachse bei. Das Fahrzeug wird somit besonders kompakt. Der kastenförmige Aufnahmeraum ist dabei gegenüber der U-förmigen Aufnahme des Lastrahmens abgeschlossen und schützt die in dem Aufnahmeraum aufgenommenen Komponenten sicher auch bei der Bewegung des Lastrahmens im Initialhub. Die Rückwand des Aufnahmeraums kann sich parallel zu der Begrenzungsplatte und/oder in unmittelbarer Nähe zu dieser erstrecken.The box-shaped receiving space of the drive frame and the U-shaped receiving space of the load frame can be designed to correspond to one another in such a way that the box-shaped receiving space can be received with an almost exact fit in the U-shaped receiving part of the load frame. According to one embodiment, the box-shaped receiving space of the drive frame consequently protrudes into the U-shaped receiving part of the load frame, in particular up to the delimitation plate. In this way, the available space is optimally used when nesting drive and load frames. In particular, the box-shaped receiving space can protrude into the U-shaped receptacle in such a way that, apart from an initial displacement, it is completely filled by the box-shaped receiving space. Only the initial displacement should continue to be provided as free space in the U-shaped receptacle of the load frame in order to enable the initial displacement in the manner explained. When adjusting the height of the load part along the initial stroke, the webs of the U-shaped receptacle can run along the side walls of the receptacle space. The initial stroke of the load part relative to the drive part can in particular be limited by the cross member of the U-shaped receptacle of the load frame and the bottom wall of the box-shaped receptacle space of the drive frame. For example, with a maximum initial stroke, the cross member can hit the bottom wall. The maximum initial stroke can, however, also be reached without such an impact occurring. With these configurations, the nesting of the load frame and drive frame according to the invention can be achieved in a simple manner and with particularly good use of space. In particular, frame walls of the drive frame can protrude so far in the direction of the load frame that only the delimitation plate of the load frame lies outside the drive frame. Thus, the load frame only contributes to the length of the lift truck along the longitudinal axis of the vehicle with the wall thickness of its delimitation plate. The vehicle is therefore particularly compact. The box-shaped receiving space is closed off and protects against the U-shaped receptacle of the load frame the components accommodated in the receiving space securely even when the load frame is moved in the initial stroke. The rear wall of the receiving space can extend parallel to the delimitation plate and / or in close proximity to it.

Nach einer Ausgestaltung weist der Antriebsrahmen mindestens zwei Hubzylinder auf zum Anheben des Lastteils, wobei die Hubzylinder jeweils an einem der Stege des Lastrahmens angreifen. Die Hubzylinder können insbesondere an gegenüberliegenden Seiten des Antriebsrahmens angeordnet sein, bevorzugt nicht in dem in den Lastrahmen ragenden Aufnahmeraum. Über an den Stegen der U-förmigen Aufnahme des Lastrahmens angeordnete Zylinderhalter können die Hubzylinder mit dem Lastrahmen verbunden sein. Die Zylinderhalter können an dem geschlossenen Aufnahmeraum des Antriebsrahmens vorbei in den Antriebsrahmen hineinragen. Alternativ kann auch lediglich ein Hubzylinder vorgesehen sein, der insbesondere mittig am Antriebsrahmen angeordnet sein kann und mit einer mittig beispielsweise an der Begrenzungsplatte der U-förmigen Aufnahme angeordneten Zylinderhalterung in Eingriff stehen kann. In diesem Fall kann der Hubzylinder auch in dem in den Lastrahmen hineinragenden Aufnahmeraum angeordnet sein.According to one embodiment, the drive frame has at least two lifting cylinders for lifting the load part, the lifting cylinders each engaging one of the webs of the load frame. The lifting cylinders can in particular be arranged on opposite sides of the drive frame, preferably not in the receiving space protruding into the load frame. The lifting cylinders can be connected to the load frame via cylinder holders arranged on the webs of the U-shaped receptacle of the load frame. The cylinder holders can protrude past the closed receiving space of the drive frame into the drive frame. Alternatively, only one lifting cylinder can be provided, which can in particular be arranged centrally on the drive frame and can be in engagement with a cylinder holder arranged centrally, for example on the delimitation plate of the U-shaped receptacle. In this case, the lifting cylinder can also be arranged in the receiving space protruding into the load frame.

Nach einer Ausgestaltung ist die Batterie quaderförmig ausgebildet und derart mittig in dem Antriebsrahmen angeordnet, dass sie sich mit einer längeren Seite entlang der Fahrzeuglängsachse erstreckt. Wie bereits angesprochen, kann die Batterie quaderförmig sein mit einer in etwa parallel zur Fahrzeuglängsachse horiztonal liegenden Grundfläche, die begrenzt ist durch zwei längere Seiten und zwei kürzere Seiten. Mit den längeren Seiten kann sich die Batterie entlang bzw. parallel zu der Fahrzeuglängsachse erstrecken. Die Batterie kann somit längs in dem Antriebsrahmen angeordnet sein. Bevorzugt ist die Batterie dabei nicht in dem in den Lastrahmen ragenden Aufnahmeraum des Antriebsrahmens angeordnet. Die mittige Anordnung bezieht sich auf eine senkrecht zur Fahrzeuglängsachse stehende, horizontale Querachse. Auf gegenüberliegenden Seiten der Batterie entlang der Querachse können Räder in dem Antriebsrahmen vorgesehen sein. Zumindest eines der Räder kann über einen Antrieb angesteuert sein. Es kann also auch ein Antrieb seitlich der Batterie angeordnet sein.According to one embodiment, the battery is cuboid and is arranged centrally in the drive frame in such a way that it extends with a longer side along the longitudinal axis of the vehicle. As already mentioned, the battery can be cuboid with a base area lying approximately parallel to the longitudinal axis of the vehicle, which is delimited by two longer sides and two shorter sides. The longer sides of the battery can extend along or parallel to the longitudinal axis of the vehicle. The battery can thus be arranged longitudinally in the drive frame. The battery is preferably not arranged in the receiving space of the drive frame that protrudes into the load frame. The central arrangement refers to a position perpendicular to the longitudinal axis of the vehicle, horizontal transverse axis. Wheels in the drive frame may be provided on opposite sides of the battery along the transverse axis. At least one of the wheels can be controlled via a drive. A drive can therefore also be arranged to the side of the battery.

Nach einer Ausgestaltung ist der Hubwagen ein Hochhubwagen mit einem an dem Lastrahmen angeordneten Hubgerüst. Der Lastrahmen kann folglich ein Hubgerüst aufweisen, mit welchem eine auf dem Lastteil aufgenommene Last nicht nur durch Anheben der Radarme im Initialhub, sondern auch darüber hinaus angehoben werden kann, beispielsweise in eine Höhe von mehreren Metern. Das Hubgerüst kann einen Hubmast und sich von dem Hubmast parallel zu den Radarmen forterstreckende Gabeln aufweisen.According to one embodiment, the lifting truck is a high-lift truck with a lifting frame arranged on the load frame. The load frame can consequently have a lifting frame with which a load received on the load part can be raised not only by lifting the wheel arms in the initial lift but also beyond, for example to a height of several meters. The lifting frame can have a lifting mast and forks extending from the lifting mast parallel to the wheel arms.

Ausgestaltungen der Erfindung werden im Folgenden anhand von Figuren erläutert. Es zeigen:

Figur 1
eine perspektivische Ansicht eines erfindungsgemäßen Hubwagens mit einem in einer Grundstellung befindlichen Lastteil,
Figur 2
der Hubwagen aus Figur 1 mit dem Lastteil im maximalen Initialhub,
Figur 3
den Hubwagen aus Figur 1 mit vom Antriebsteil abgenommenen Lastteil,
Figur 4
der Hubwagen aus Figur 1 in einer Explosionsdarstellung in seitlicher Ansicht,
Fig. 5, 6
der Antriebsteil des Hubwagens aus Figur 1 in unterschiedlichen Ansichten,
Figur 7
den Hubwagen aus Figur 1 in einer teilweisen Schnittansicht,
Figur 8
den Hubwagen aus Figur 2 in einer teilweisen Schnittansicht,
Figur 9
ein Lastteil gemäß einer weiteren Ausgestaltung, und
Figur 10
einen Hubwagen mit einem am Lastteil angeordneten Hubgerüst.
Embodiments of the invention are explained below with reference to figures. Show it:
Figure 1
a perspective view of a pallet truck according to the invention with a load part located in a basic position,
Figure 2
the pallet truck off Figure 1 with the load part in the maximum initial stroke,
Figure 3
the pallet truck Figure 1 with the load part removed from the drive part,
Figure 4
the pallet truck off Figure 1 in an exploded view from the side,
Fig. 5, 6
the drive part of the pallet truck Figure 1 in different views,
Figure 7
the pallet truck Figure 1 in a partial sectional view,
Figure 8
the pallet truck Figure 2 in a partial sectional view,
Figure 9
a load part according to a further embodiment, and
Figure 10
a lifting truck with a lifting frame arranged on the load part.

Soweit nichts anderes angegeben ist, bezeichnen im Folgenden gleiche Bezugszeichen gleiche Gegenstände.Unless otherwise specified, the same reference symbols denote the same items in the following.

In Figur 1 ist ein erfindungsgemäßer Hubwagen mit einem Antriebsteil 10 und einem an dem Antriebsteil 10 gelagerten und relativ zu dem Antriebsteil um einen Initialhub höhenverstellbaren Lastteil 30 ersichtlich. Ein Antriebsrahmen 12 des Antriebsteils 10 trägt mehrere Komponenten, die für die Funktion des Hubwagens wesentlich sind. So sind in dem Antriebsrahmen 12 ein elektrischer Antrieb 14, eine Batterie 16, elektrische Komponenten 15 sowie ein Hydraulikaggregat 18 angeordnet. Der Antriebsrahmen 12 umfasst einen Hauptraum 12a und einen sich von dem Hauptraum 12a in Richtung des Lastteils 30 erstreckenden Aufnahmeraum 12b.In Figure 1 a lift truck according to the invention with a drive part 10 and a load part 30 mounted on the drive part 10 and adjustable in height relative to the drive part by an initial stroke can be seen. A drive frame 12 of the drive part 10 carries several components that are essential for the function of the lift truck. An electric drive 14, a battery 16, electrical components 15 and a hydraulic unit 18 are arranged in the drive frame 12. The drive frame 12 comprises a main space 12a and a receiving space 12b extending from the main space 12a in the direction of the load part 30.

Das Lastteil 30 umfasst einen Lastrahmen 32, sowie sich von dem Lastrahmen 32 entlang einer Fahrzeuglängsachse L forterstreckende Radarme 34, die an ihren freien Enden jeweils ein Rad 36 zum Abstützen des Hubwagens an einem Boden aufweisen. Das Lastteil 30 ist gegenüber dem Antriebsteil 10 um einen Initialhub in der Höhe verstellbar, wobei im Hauptraum 12a des Antriebsrahmens 12 angeordnete Hubzylinder 20 auf das Lastteil 30 wirken, wie später noch erläutert wird. Das Lastteil 30 kann somit relativ zum Antriebsteil 10 angehoben werden, wie in Figur 2 ersichtlich. Beim Durchfahren des Initialhubs werden somit die Radarme 34 und der Lastrahmen 32 vom Boden angehoben, wobei die Räder 36 mit dem Boden in Kontakt bleiben. Somit kann eine größere Bodenfreiheit erreicht werden und insbesondere auch unebenes Gelände befahren werden.The load part 30 comprises a load frame 32, as well as wheel arms 34 which extend from the load frame 32 along a vehicle longitudinal axis L and each have a wheel 36 at their free ends for supporting the lift truck on a floor. The height of the load part 30 can be adjusted by an initial stroke with respect to the drive part 10, lifting cylinders 20 arranged in the main space 12a of the drive frame 12 acting on the load part 30, as will be explained later. The load part 30 can thus be raised relative to the drive part 10, as in FIG Figure 2 evident. When driving through the initial stroke, the wheel arms 34 and the load frame 32 are thus raised from the ground, the wheels 36 with the ground in Stay in contact. In this way, greater ground clearance can be achieved and, in particular, uneven terrain can be traveled on.

Erfindungsgemäß ist die Batterie 16 nicht in dem Lastteil 30 sondern in dem Antriebsteil 10 angeordnet. Die Batterie 16 verdrängt durch die Anordnung in dem Hauptraum 12a des Antriebsrahmens 12 dort üblicherweise angeordnete Komponenten, welche erfindungsgemäß nun in dem Aufnahmeraum 12b angeordnet sind. In dem vorliegenden Ausführungsbeispiel sind dies die elektrischen Komponenten 15 sowie das Hydraulikaggregat 18. Es können jedoch auch andere Komponenten des Hubwagens dorthin verlagert werden.According to the invention, the battery 16 is not arranged in the load part 30 but in the drive part 10. Due to the arrangement in the main space 12a of the drive frame 12, the battery 16 displaces components which are usually arranged there and which, according to the invention, are now arranged in the receiving space 12b. In the present exemplary embodiment, these are the electrical components 15 and the hydraulic unit 18. However, other components of the lifting truck can also be relocated there.

Der Aufnahmeraum 12b ist kastenförmig ausgebildet und umfasst zwei vertikale Seitenwände 52, die einander gegenüberliegend parallel zueinander verlaufen, eine die Seitenwände 52 verbindende, senkrecht zur Fahrzeuglängsachse L stehende Rückwand 50, sowie eine den Aufnahmeraum 12b nach unten abschließende Bodenwand 56, wie insbesondere in Figur 3 zu erkennen. In Richtung zu dem Hauptraum 12a ist der Aufnahmeraum 12b offen ausgebildet. Zudem ist der Aufnahmeraum 12b auch nach oben, der Bodenwand 56 gegenüberliegend offen. Der Aufnahmeraum 12b bildet also einen in den Lastrahmen 32 hineinragenden kastenförmigen Rahmenabschnitt des Antriebsrahmens 12.The receiving space 12b is box-shaped and comprises two vertical side walls 52 which run parallel to each other opposite one another, a rear wall 50 connecting the side walls 52 and perpendicular to the vehicle longitudinal axis L, and a bottom wall 56 that closes off the receiving space 12b at the bottom, as in particular in FIG Figure 3 to recognize. The receiving space 12b is designed to be open in the direction of the main space 12a. In addition, the receiving space 12b is also open at the top, opposite the bottom wall 56. The receiving space 12b thus forms a box-shaped frame section of the drive frame 12 that projects into the load frame 32.

Der Lastrahmen 32 umfasst eine senkrecht zur Fahrzeuglängsachse L stehende Begrenzungsplatte 38, einen horizontalen Querträger 40 und sich von dem Querträger 40 nach oben forterstreckende, zueinander parallele Stege 42. Die Stege 42 und der Querträger 40 sind an der dem Antriebsrahmen 12 zugewandten Seite der Begrenzungsplatte 38 angeordnet und bilden eine U-förmige Aufnahme, die in Richtung der Radarme 34 von der Begrenzungsplatte 38 begrenzt ist. Somit wird auch hier eine kastenförmige Aufnahme gebildet, die zur Aufnahme des Aufnahmeraums 12b ausgebildet ist.The load frame 32 comprises a delimitation plate 38 perpendicular to the vehicle longitudinal axis L, a horizontal cross member 40 and mutually parallel webs 42 extending upward from the cross member 40. The webs 42 and the cross member 40 are on the side of the delimitation plate 38 facing the drive frame 12 and form a U-shaped receptacle which is delimited in the direction of the wheel arms 34 by the delimitation plate 38. A box-shaped receptacle is thus also formed here, which is designed to receive the receiving space 12b.

Wie insbesondere in Figur 3 ersichtlich, sind der Aufnahmeraum 12b und die U-förmige Aufnahme 40, 42 korrespondierend zueinander ausgebildet, greifen also relativ passgenau ineinander. In Figur 3 ist zudem zu erkennen, dass der Lastrahmen 32 über unterhalb des Querträgers 40 angeordnete Lagerabschnitte 44 verfügt, an denen die Radarme 34 angeordnet sind. Der Lastrahmen 32 und damit das gesamte Lastteil 30 stehen über zwei an einem oberen Ende der Stege 42 angeordnete Zylinderhalter 48 mit dem Hubzylinder 20 des Antriebsrahmens 12 in Eingriff. Zudem ist der Lastrahmen 32 und damit das gesamte Lastteil 30 an einer Unterseite des Hubwagens über eine Hubkinematik 60 mit dem Antriebsteil 10 verbunden, wie insbesondere in Figur 4 sowie den Figuren 7 und 8 ersichtlich. Die Hubkinematik 60 umfasst pro Radarm 34 eine sich entlang des jeweiligen Radarms 34 erstreckende Druckstange 64, die an einem ersten Ende über einen Umlenkhebel 62 an einer unterhalb des Hauptraums 12a des Antriebsrahmens 12 angeordneten Lagerung 63 mit dem Antriebsteil verbunden ist und die über eine an einem zweiten Ende angeordnete Lagerung 66 an Lageabschnitten 65 der Radarme 34 angelenkt ist.As in particular in Figure 3 As can be seen, the receiving space 12b and the U-shaped receptacle 40, 42 are designed to correspond to one another, that is to say they engage with one another with a relatively precise fit. In Figure 3 it can also be seen that the load frame 32 has bearing sections 44 which are arranged below the cross member 40 and on which the wheel arms 34 are arranged. The load frame 32 and thus the entire load part 30 are in engagement with the lifting cylinder 20 of the drive frame 12 via two cylinder holders 48 arranged at an upper end of the webs 42. In addition, the load frame 32 and thus the entire load part 30 on an underside of the lifting truck is connected to the drive part 10 via lifting kinematics 60, as in particular in FIG Figure 4 as well as the Figures 7 and 8 evident. The lifting kinematics 60 comprises for each wheel arm 34 a push rod 64 which extends along the respective wheel arm 34 and which is connected to the drive part at a first end via a reversing lever 62 on a bearing 63 arranged below the main space 12a of the drive frame 12 and which is connected to the drive part via a Storage 66 arranged at the second end is articulated to bearing sections 65 of the wheel arms 34.

Der Antriebsrahmen 12 verfügt in seinem Hauptraum 12a über eine nahezu mittig angeordnete Batterieaufnahme 24, wie insbesondere in Figur 3 zu erkennen. Die quaderförmige Batterie 16 wird in dieser Batterieaufnahme 24 längs aufgenommen, erstreckt sich also mit ihren Längsseiten parallel zur Fahrzeuglängsachse L. Bezogen auf eine horizontale, senkrecht zur Fahrzeuglängsachse L verlaufende Querachse liegt die Batterie 16 somit nahezu mittig in dem Hauptraum 12a. Auf gegenüberliegenden Seiten des Batterieaufnahmeraums 24 sind ein Antriebsträger 26, sowie ein Stützradträger 28 ausgebildet. Der Antriebsträger 26 nimmt den Antrieb 14 auf, sowie ein durch den Antrieb bewegtes Rad. Der Stützradträger 28 nimmt ein Stützrad auf.In its main space 12a, the drive frame 12 has a battery receptacle 24 arranged almost in the middle, as in particular in FIG Figure 3 to recognize. The cuboid battery 16 is received longitudinally in this battery receptacle 24, that is, its long sides extend parallel to the vehicle longitudinal axis L. In relation to a horizontal transverse axis perpendicular to the vehicle longitudinal axis L, the battery 16 is thus almost centrally located in the main space 12a. A drive carrier 26 and a support wheel carrier 28 are formed on opposite sides of the battery receiving space 24. The drive carrier 26 accommodates the drive 14, as well as a wheel moved by the drive. The support wheel carrier 28 accommodates a support wheel.

Insbesondere in den Figuren 5 und 6 ist gut zu erkennen, dass sich der kastenförmige Aufnahmeraum 12b ausgehend von dem Hauptraum 12a des Antriebsrahmens 12 forterstreckt. Der kastenförmige Aufnahmeraum 12b ragt in die U-förmige Aufnahme 46 des Lastrahmens 32 hinein, wobei die Stege 42 in Freiräume aufgenommen werden, die sich jeweils zwischen den Seitenwänden 52 des Aufnahmeraums 12b und den Seitenwänden 52 jeweils gegenüberliegenden Rahmenwänden 13 des Antriebsrahmens 12 ausbilden. Die Rahmenwände 13 ragen dabei derart weit in Richtung des Lastrahmens 32, dass nur die Begrenzungsplatte 38 des Lastrahmens außerhalb des Antriebsrahmens liegt. Somit trägt der Lastrahmen 32 nur mit der Wandstärke seiner Begrenzungsplatte 38 zu der Länge des Hubwagens entlang der Fahrzeuglängsachse bei. Das Fahrzeug wird somit besonders kompakt.Especially in the Figures 5 and 6 it can be clearly seen that the box-shaped receiving space 12b extends from the main space 12a of the drive frame 12. The box-shaped receiving space 12b protrudes into the U-shaped Receiving 46 of the load frame 32 into it, the webs 42 being received in free spaces which are each formed between the side walls 52 of the receiving space 12b and the side walls 52 of the opposite frame walls 13 of the drive frame 12. The frame walls 13 protrude so far in the direction of the load frame 32 that only the limiting plate 38 of the load frame lies outside the drive frame. The load frame 32 thus only contributes to the length of the lift truck along the longitudinal axis of the vehicle with the wall thickness of its delimitation plate 38. The vehicle is therefore particularly compact.

Unterhalb des Aufnahmeraums 12b ist der Querträger 40 der U-förmigen Aufnahme 46 des Lastrahmens 32 angeordnet, wie insbesondere in den Figuren 7 und 8 zu erkennen. In Figur 7 befindet sich das Lastteil 30 im abgesenkten Zustand. Hierbei ist deutlich erkennbar, dass zwischen dem Aufnahmeraum 12b und dem Querträger 40 des Lastrahmens 32 ein Initialhubraum 70 ausgebildet ist. Zudem ist erkennbar, dass sich der Aufnahmeraum 12b bis hin zu der Begrenzungsplatte 38 des Lastrahmens erstreckt. Lastrahmen 32 sowie Antriebsrahmen 12 sind also ineinander verschachtelt. Der Aufnahmeraum 12b ragt derart in den Lastrahmen 32 hinein, dass der Initialhub des Lastteils 30 nach oben begrenzt ist. Diese Begrenzung wird realisiert durch den Querträger 40, wie in Figur 8 ersichtlich. Wird der Initialhub durchfahren, so durchläuft der Querträger 40 den Initialhubraum 70 und nähert sich der Bodenwand 56 des Aufnahmeraums 12b an. Ein oberes Ende des Lastrahmens 32 erstreckt sich dabei über den Antriebsrahmen 12 hinaus. Dieser Initialhub wird erreicht durch Ausfahren von Zylinderkolben 29 aus dem Hubzylinder 20. Die Umlenkhebel 62 werden hierbei um ihre Lagerung 63 verschwenkt und somit die Radarme 34 in der in Figur 8 ersichtlichen Weise vom Boden abgehoben. Der Hauptraum 12a des Antriebsrahmens ist über eine Zwischenwand 13 und der Aufnahmeraum 12b über die anschließende Bodenwand 56 gegenüber dem Querträger 40 abgeschlossen.The cross member 40 of the U-shaped receptacle 46 of the load frame 32 is arranged below the receiving space 12b, as in particular in FIG Figures 7 and 8 to recognize. In Figure 7 the load part 30 is in the lowered state. It can be clearly seen here that an initial displacement space 70 is formed between the receiving space 12b and the cross member 40 of the load frame 32. It can also be seen that the receiving space 12b extends as far as the delimitation plate 38 of the load frame. Load frame 32 and drive frame 12 are thus nested in one another. The receiving space 12b protrudes into the load frame 32 in such a way that the initial stroke of the load part 30 is limited upward. This limitation is realized by the cross member 40, as in FIG Figure 8 evident. If the initial stroke is traversed, the cross member 40 traverses the initial stroke space 70 and approaches the bottom wall 56 of the receiving space 12b. An upper end of the load frame 32 extends beyond the drive frame 12. This initial stroke is achieved by extending the cylinder piston 29 out of the lifting cylinder 20. The deflection levers 62 are pivoted about their bearing 63 and the wheel arms 34 are thus in the position shown in FIG Figure 8 clearly lifted from the ground. The main space 12a of the drive frame is closed off from the cross member 40 via an intermediate wall 13 and the receiving space 12b via the adjoining bottom wall 56.

Durch die erläuterte Verschachtelung von Antriebsrahmen 12 und Lastrahmen 32 wird der zur Verfügung stehende Bauraum ideal genutzt. Die U-förmige Aufnahme 46 im Lastrahmen 32 wird durch den in diese Aufnahme hineinragenden Aufnahmeraum 12b im Wesentlichen vollständig ausgefüllt, wobei lediglich der Initialhubraum 70 verbleibt, um das Durchfahren des Initialhubs zu ermöglichen. In diesem Sinne begrenzt der Aufnahmeraum 12b den Initialhub des Lastteils 32 nach oben, ist also oberhalb des Initialhubraums 70 angeordnet. Aufgrund dieser Verschachtelung von Antriebsrahmen und Lastrahmen kann trotz der Verdrängung einiger Komponenten des Hubwagens aus dem Antriebsrahmen durch die Batterie der Hubwagen kompakter ausgeführt werden. Insbesondere kann eine Längserstreckung des Hubwagens entlang der Fahrzeuglängsachse L verringert werden. Der Aufnahmeraum 12b ist gegenüber dem Lastrahmen 32 geschlossen, wie insbesondere in den Figuren 5 und 6 gut zu erkennen. Auch der Hauptraum 12a ist gegenüber dem Lastrahmen 32 verschlossen, lediglich die Zylinderhalter 48 ragen in diesen hinein. Es wird somit eine klare Trennung zwischen Lastrahmen und Antriebsrahmen erreicht, was insbesondere zu einem guten Schutz der im Antriebsrahmen angeordneten Komponenten führt.Due to the explained nesting of drive frame 12 and load frame 32, the available installation space is ideally used. The U-shaped receptacle 46 in the load frame 32 is essentially completely filled by the receiving space 12b protruding into this receptacle, with only the initial displacement 70 remaining in order to enable the initial displacement to be passed through. In this sense, the receiving space 12b limits the initial stroke of the load part 32 upwards, that is to say is arranged above the initial stroke volume 70. Due to this nesting of the drive frame and load frame, despite the displacement of some components of the lift truck from the drive frame by the battery, the lift truck can be made more compact. In particular, a longitudinal extension of the lift truck along the vehicle longitudinal axis L can be reduced. The receiving space 12b is closed with respect to the load frame 32, as in particular in FIG Figures 5 and 6 clearly visible. The main space 12a is also closed off from the load frame 32, only the cylinder holders 48 protrude into it. A clear separation is thus achieved between the load frame and the drive frame, which in particular leads to good protection of the components arranged in the drive frame.

Figur 9 zeigt einen Lastrahmen 32', der sich von dem zuvor erläuterten Lastrahmen lediglich durch seinen Zylinderhalter unterscheidet. So ist anstatt zweier jeweils an den Stegen 42 angeordneter Zylinderhalter nur ein mittig an der Begrenzungsplatte 38 an einem oberen Ende angeordneter Zylinderhalter 48' vorgesehen. Ein zu dem Lastrahmen 32' passend ausgeführter Antriebsrahmen kann entsprechend anstatt der an gegenüberliegenden Seiten angeordneten Hubzylinder einen mittig im Antriebsrahmen angeordneten Hubzylinder aufweisen. Figure 9 shows a load frame 32 'which differs from the previously explained load frame only in its cylinder holder. Thus, instead of two cylinder holders each arranged on the webs 42, only one cylinder holder 48 ′ arranged centrally on the delimitation plate 38 at an upper end is provided. A drive frame designed to match the load frame 32 'can accordingly have a lift cylinder arranged centrally in the drive frame instead of the lift cylinders arranged on opposite sides.

In Figur 10 ist ein Hubwagen ersichtlich mit einem an dem Lastrahmen 32 angeordneten Hubgerüst 80 und sich von dem Hubgerüst 80 parallel zu den Radarmen 34 erstreckenden Gabeln 82. Über die Gabeln 82 kann eine Last aufgenommen und durch Ausfahren des Hubgerüsts 80 in eine Höhe von mehreren Metern verbracht werden. Der in Figur 10 ersichtliche Hubwagen ist somit ein Hochhubwagen. Auch hier ist die erfindungsgemäße Verschachtelung von Antriebsrahmen und Lastrahmen von besonderem Vorteil.In Figure 10 a lifting truck can be seen with a lifting frame 80 arranged on the load frame 32 and forks 82 extending from the lifting frame 80 parallel to the wheel arms 34 Meters. The in Figure 10 The apparent pallet truck is therefore a high-lift truck. Here, too, the nesting of the drive frame and load frame according to the invention is of particular advantage.

BezugszeichenlisteList of reference symbols

1010
AntriebsteilDrive part
1212th
AntriebsrahmenDrive frame
12a12a
HauptraumMain room
12b12b
AufnahmeraumRecording room
1313th
RahmenwändeFrame walls
1414th
Antriebdrive
1515th
elektrische Komponentenelectric components
1616
Batteriebattery
1717th
ZwischenwandPartition wall
1818th
HydraulikaggregatHydraulic power pack
2020th
HubzylinderLifting cylinder
2424
BatterieaufnahmeraumBattery compartment
2626th
AntriebsträgerDrive carrier
2828
StützradträgerSupport wheel carrier
2929
ZylinderkolbenCylinder piston
32, 32'32, 32 '
LastrahmenLoad frame
3434
RadarmeSupport arms
3636
Räderbikes
3838
BegrenzungsplatteBoundary plate
4040
QuerträgerCross member
4242
StegeBridges
4646
U-förmige AufnahmeU-shaped mount
48,48'48.48 '
ZylinderhalterCylinder holder
5050
RückwandBack wall
5252
Seitenwändeside walls
5656
BodenwandBottom wall
6060
HubkinematikLifting kinematics
6262
UmlenkhebelReversing lever
6363
LagerungenBearings
6464
DruckstangenPush rods
6565
LagerabschnitteStorage sections
6666
LagerungenBearings
8080
HubgerüstMast
8282
GabelnForks
LL.
FahrzeuglängsachseVehicle longitudinal axis

Claims (10)

  1. A pallet truck comprising a drive part (10) and a load part (30) which is mounted on the drive part (10) and the height of which relative to the drive part (10) can be adjusted by an initial lift, wherein a drive frame (12) of the drive part (10) comprises components (14, 15, 18, 20) of the pallet truck and the load part (30) comprises a load frame (32) as well as wheel arms (34) extending out from the load frame (32) along a vehicle longitudinal axis (L), wherein the wheel arms (34) each have at least one wheel (36) on their free ends for support on a floor, wherein
    a battery (16) supplying a drive (14) of the pallet truck is received in the drive frame (12), characterized in that the drive frame (12)
    comprises a receiving space (12b), which is closed off with respect to the load frame (32) and in which components (15, 18) of the drive part (10) are arranged, wherein the receiving space (12b) projects into the load frame (32) and puts an upper limit on the initial lift of the load part (30).
  2. The pallet truck according to claim 1, characterized in that the components of the drive part (10) arranged in the receiving space (12b) projecting into the load frame (32) include one or more of the following: a hydraulic unit (18), in particular a hydraulic pump and/or a hydraulic tank, electrical components (15), in particular control components such as a vehicle controller.
  3. The pallet truck according to claim 1 or 2, characterized in that the battery (16) is not arranged in the receiving space (12b) projecting into the load frame (32).
  4. The pallet truck according to any one of claims 1 to 3, characterized in that the receiving space (12b) is box-shaped, comprising two vertical side walls (52), a rear wall (50) connecting the side walls (52) and standing perpendicularly to the vehicle longitudinal axis (L), and also a base wall (56), which closes off the receiving space (12b) at the bottom, wherein the base wall (56) puts an upper limit on the initial lift of the load part (30).
  5. The pallet truck according to any one of claims 1 to 4, characterized in that the load frame (32) comprises a delimiting plate (38) standing perpendicularly to the vehicle longitudinal axis (L), a horizontal crossmember (40), and parallel ribs (42) extending upward from the crossmember (40), such that the crossmember (40) and the ribs (42) form a U-shaped receptacle (46), which is delimited on the side of the wheel arms by the delimiting plate (38).
  6. The pallet truck according to claims 4 and 5, characterized in that the box-shaped receiving space (12b) of the drive frame (12) projects into the U-shaped receptacle (46) of the load frame (32).
  7. The pallet truck according to claim 6, characterized in that the box-shaped receiving space (12b) of the drive frame (12) projects into the U-shaped receptacle (46) of the load frame (32) up to the delimiting plate (38).
  8. The pallet truck according to any one of claims 5 to 7, characterized in that the drive frame (12) comprises at least two lifting cylinders (20) for lifting the load part (30), wherein the lifting cylinders (20) each act on one of the ribs (42) of the load frame (32).
  9. The pallet truck according to any one of the preceding claims, characterized in that the battery (16) is cuboid and is arranged centrally in the drive frame (12) such that it extends with a longer side along the vehicle longitudinal axis (L).
  10. The pallet truck according to any one of the preceding claims, characterized in that the pallet truck is a high-lift truck comprising a mast (80) arranged on the load frame (32).
EP20153519.2A 2019-01-25 2020-01-24 Carriage with initial stroke Active EP3730450B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102019101864.1A DE102019101864A1 (en) 2019-01-25 2019-01-25 Cart with initial lift

Publications (2)

Publication Number Publication Date
EP3730450A1 EP3730450A1 (en) 2020-10-28
EP3730450B1 true EP3730450B1 (en) 2021-07-28

Family

ID=69375226

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20153519.2A Active EP3730450B1 (en) 2019-01-25 2020-01-24 Carriage with initial stroke

Country Status (2)

Country Link
EP (1) EP3730450B1 (en)
DE (1) DE102019101864A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102021102061A1 (en) 2021-01-29 2022-08-04 Jungheinrich Aktiengesellschaft Industrial truck with a load frame
DE102021105790A1 (en) 2021-03-10 2022-09-15 Jungheinrich Aktiengesellschaft Industrial truck with at least one jockey wheel

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3612564A (en) * 1970-01-16 1971-10-12 Allis Chalmers Mfg Co Lift linkage for walkie lift truck
DE19935008B4 (en) * 1999-07-26 2004-09-16 Jungheinrich Ag Pallet truck
DE19934993B4 (en) 1999-07-26 2004-04-15 Jungheinrich Ag Wheel arms for pallet trucks
DE10221312B4 (en) * 2002-05-14 2006-04-06 Jungheinrich Ag Frame for the drive part of a truck, especially a lift truck
DE202006000552U1 (en) * 2006-01-14 2006-03-16 Jungheinrich Ag pallet truck

Also Published As

Publication number Publication date
DE102019101864A1 (en) 2020-08-13
EP3730450A1 (en) 2020-10-28

Similar Documents

Publication Publication Date Title
DE19846000A1 (en) Industrial truck with a battery pack
EP2850968B1 (en) Piece goods warehouse
EP3263510B1 (en) Outrigger comprising an apparatus for reducing vibrations
EP2641862B1 (en) Pedestrian-controlled highlifter
EP3730450B1 (en) Carriage with initial stroke
DE3017456C2 (en) Freely movable high-bay stacker
EP3050838B1 (en) Fork carrier for an industrial truck
EP2953887B1 (en) Device for receiving and for transporting loads
DE202010002764U1 (en) Load-carrying construction for attachment to a load carriage
EP3293027B1 (en) Roof of a planning structure with a rail structure
DE102006032733A1 (en) Battery pack for an industrial truck comprises a housing containing battery cells and having openings leading into pipes inside the housing into which the fork arms of a fork lift truck can be inserted
DE102009056419B4 (en) Load part for an industrial truck
DE2503508A1 (en) VEHICLE SYSTEM FOR HANDLING LOADS
DE2112545A1 (en) Movable lifting conveyor
EP3144265B2 (en) Lifting device with a chassis frame
DE102018112566A1 (en) Truck with extendable structure
EP2090457B1 (en) battery-operated industrial truck including a contacting system
EP3686150B1 (en) Industrial truck with a battery-powered driven part
DE19700272B4 (en) Industrial truck, in particular tiller-guided industrial truck
WO2018018061A1 (en) Self-driving floor conveyor device
DE102010027889A1 (en) Scissors lifting platform for lifting e.g. passenger car in workshop, has receiving element attached between left-sided and right-sided guide elements, where receiving element is opened at front end and comprises upper contact portion
EP2518005B1 (en) Industrial truck
DE2835031A1 (en) Laterally sliding arrangement for forklift truck - has forks of semicircular cross=section with guides, which slide on matching profile and hold lateral support arms
EP2177470B1 (en) Industrial truck for transporting special palettes
DE10258294B4 (en) Battery operated pallet truck

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN PUBLISHED

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

17P Request for examination filed

Effective date: 20201001

RBV Designated contracting states (corrected)

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: GRANT OF PATENT IS INTENDED

INTG Intention to grant announced

Effective date: 20210329

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE PATENT HAS BEEN GRANTED

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 502020000102

Country of ref document: DE

REG Reference to a national code

Ref country code: AT

Ref legal event code: REF

Ref document number: 1414587

Country of ref document: AT

Kind code of ref document: T

Effective date: 20210815

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: LANGUAGE OF EP DOCUMENT: GERMAN

REG Reference to a national code

Ref country code: LT

Ref legal event code: MG9D

REG Reference to a national code

Ref country code: NL

Ref legal event code: MP

Effective date: 20210728

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210728

Ref country code: RS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210728

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210728

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210728

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20211129

Ref country code: NO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20211028

Ref country code: HR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210728

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210728

Ref country code: LT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210728

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20211028

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210728

Ref country code: LV

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210728

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20211029

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210728

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 502020000102

Country of ref document: DE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SM

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210728

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210728

Ref country code: RO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210728

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210728

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210728

Ref country code: AL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210728

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20220429

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MC

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210728

REG Reference to a national code

Ref country code: BE

Ref legal event code: MM

Effective date: 20220131

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20220124

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20220131

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20220124

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20230123

Year of fee payment: 4

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20230131

Year of fee payment: 4

Ref country code: DE

Payment date: 20230119

Year of fee payment: 4

P01 Opt-out of the competence of the unified patent court (upc) registered

Effective date: 20230628

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20230131

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20230131