EP4209445A1 - Lifting device and lifting system - Google Patents

Abstract

Lifting device (100) for lifting and/or transporting an object, comprising: a main body (102), a holder (104) for an object, which is attached to the main body (102) and movable relative to the main body (102), and a gear arrangement (106) adapted to be driven to move the bracket (104) relative to the main body (102), the lifting device (100) being wheelable and/or portable; and a lifting system comprising at least two lifting devices (100).

Description

The invention relates to a lifting device for lifting and/or moving/transporting an object and a lifting system with at least two such lifting devices.

From the document US 3,022,428A a lifting device and a lifting system is known.

The object of the invention is to structurally and/or functionally improve a lifting device as mentioned at the outset. In addition, the invention is based on the object of improving the structure and/or functionality of a lifting system mentioned at the outset.

The object is achieved with a lifting device having the features of claim 1. The object is also achieved with a lifting system having the features of claim 8. Advantageous designs and/or developments are the subject matter of the dependent claims.

The object can also be achieved in that the features, for example the preamble or the characterizing part, of claim 1 are supplemented by at least one of the following features.

Lifting device can be designed for lifting and/or lowering an object. In addition, the lifting device can be designed to move or transport the object, in particular from one location to another location. The lifting device is designed to be wheeled and/or portable. The lifting device may have a main body. The lifting device can have rollers. The rollers can be attached to the main body. In this case, the rollers can be attached to the main body in a fixed manner or can be exchanged in a non-destructive manner. The roles can be designed for a specific surface, for example depending on Surface condition and degree of hardness of the subsoil. In addition, the rollers can be adapted to the load to be lifted due to the object. The rollers can be two or more, eg three, four, five, six, etc. If there are only two rollers, they can be arranged coaxially or collinearly. The rollers can be drivable, for example by means of a motor or a number of motors provided for this purpose on the lifting device. At least some of the rollers may also be steerable, e.g. powered or manually, e.g. by applying lateral pressure to the main body. The drive and/or the steering can be controlled by means of a remote control. The rollers can be moved into and out of the lifting device. The rollers can be retractable, in particular in the main body and/or floor/floor element. For precise location and placement of the lifting device, it can have a location system, such as GPS.

The lifting device can be designed and/or dimensioned in such a way, ie have a size and/or a weight, that it can preferably be lifted and/or carried by a user. The lifting device can be embodied as a portable lifting device, which can in particular be carried or lifted by the user by hand. The lifting device can be designed to be mobile and/or be a mobile lifting device. The weight of the lifting device can be about 3 to 13 kg, for example about 7 kg. The size of the lifting device can roughly correspond to the size of a piece of hand luggage, a satchel, a rucksack or a couple of DIN A4 folders, for example two, three, four or more DIN A4 folders. The lifting device can be designed to be carried by the user by means of a rucksack, for example in a rucksack. The lifting device may have at least one handle arranged on the main body. Two handles may be provided on opposite lateral sides of the main body and/or one handle may be provided on an upper side of the main body. The handles can be designed to be foldable. The handles can be designed to be retractable, for example retractable in the main body. The handles can be recesses or indentations in the main body. The lifting device can be of compact design. The lifting device can be designed in such a way that it can be placed on the object to be lifted or attached to it by hand.

The main body can be formed as a hollow box. The main body can be monolithic. The main body can comprise a floor, such as a floor element, and a ceiling, such as a ceiling element, parallel thereto, as well as walls running perpendicularly in between, such as wall elements, which are connected to one another. The walls can be two parallel side walls and optionally a back wall. The side walls can be identical.

The floor or the floor element can be designed in one piece or in several parts. The floor or the floor element can be designed to change its length and/or width. The floor or the floor element can be telescopic. The floor or the floor element can have at least two mutually displaceable parts, such as telescopic parts. The at least two mutually displaceable parts can be configured to be displaceable substantially perpendicularly to the lifting/lowering direction and/or substantially horizontally. The parts can be moved by means of the motor and/or by hand. For example, the shifting can take place by driving the rollers in rotation, for example with opposite directions of rotation. The lifting device and/or the mutually displaceable parts of the floor or floor element can be designed such that the mutually displaceable parts of the floor or floor element are moved or extended depending on the lift/lift increase and/or lowering/lift decrease. For example, the parts of the floor or floor element that can be displaced relative to one another, in particular relative to one another, can be pushed further apart and/or pushed further away from one another or extended, the greater the stroke/stroke increase. This means that the floor or the floor element can increase and/or decrease, in particular in the horizontal direction, in particular as a function of the lift/increase in lift and/or lowering/decrease in lift. For example, the floor or the floor element, in particular in the horizontal direction, is enlarged when the stroke/stroke increase becomes greater. Conversely, the floor or the floor element, in particular in the horizontal direction, can be reduced if the stroke/stroke increase becomes smaller.

The lifting device can have at least one linear guide. For example, the lifting device can have two, three, four or more linear guides. The at least one linear guide can be designed as a lifting column or have at least one lifting column. The at least one linear guide or the several linear guides can extend essentially parallel to one another and/or parallel to the walls or side walls, in particular between the floor/floor element and the ceiling/ceiling element. The at least one linear guide can be fixed and/or fastened to the floor/floor element and/or to the ceiling/ceiling element. The at least one linear guide can additionally or alternatively be fixed and/or fastened to the rear wall. The at least one linear guide can additionally or alternatively be fixed and/or fastened to the walls or side walls or integrated into the side walls, e.g. on the facing sides of the side walls and/or on the opposite sides of the side walls. The at least one linear guide can be rail-shaped. The at least one linear guide can end at a distance from the floor and/or the ceiling. The at least one linear guide can have at least one linear bearing. The at least one linear bearing can be designed as a linear bearing block. The at least one linear bearing can be mounted in a linearly movable manner on the lifting column. The at least one linear bearing can be firmly connected to the mount, for example to a holding means of the mount. The holding means can be designed as a platform.

The elevator may be self-locking to block movement of the bracket relative to the main body when the gear assembly is not being driven.

The self-locking can be part of the gear arrangement and/or can be provided by means of a known gear-spring arrangement. Alternatively or additionally, the self-locking can be provided on one of the guides of the holder to the main body.

The lifting device may include an elongate pull member for moving the bracket relative to the main body. The pulling element can, for example with its one end, with a part that can be moved relative to the main body and/or with the Transmission assembly can be coupled / coupled and / or connected. The pulling element can, for example, be coupled and/or connected to the holder with its other end.

The pulling element can be coupled and/or connected at one end to a part of the gear arrangement that is movable relative to the main body and at its other end to the holder. The pulling element can be, for example, one of the following: belt, belt, chain, cable, band, pulling strap, etc. The pulling element can be coupled and/or connected to the transmission arrangement and/or to the holder in a fixed or non-destructively exchangeable manner. Thus, one longitudinal end of the pulling element can be coupled and/or connected to the gear arrangement via a bearing, for example via a needle bearing used below but which can be exchanged for a different type of bearing. Alternatively or additionally, the other longitudinal end of the tension element can be coupled and/or connected to the holder via a needle bearing. The needle bearing can be rigidly coupled and/or connected to the gear assembly or the mount. Alternatively, the needle bearing can support the pulling element on an axle, which in turn is coupled and/or connected to the gear arrangement or the holder so that it can be replaced in a non-destructive manner. This can be done via a corresponding recording, for example via a corresponding undercut, on the gear assembly or the bracket. One end of the pulling element can be coupled and/or connected to an axle or a gear wheel of the transmission arrangement in one of the ways mentioned. The other end of the pulling element can be coupled and/or connected to the holder, in particular at or near the center of gravity of the holder. Alternatively or additionally, the gear arrangement can have a receptacle for the other end of the pulling element, while the holder has a guide for the pulling element. As a result, the pulling element can be coupled and/or connected to the gear arrangement at both of its ends and guided between them around or through the mount, if necessary also around an object on the mount. If the mount has a holding means designed as a platform, the center of gravity can be located on the side of the platform in the mount. To couple the tension element to the gear arrangement and the bracket, the Needle bearings can be replaced with another type of bearing. Alternatively, the use of a bearing can also be dispensed with. A connecting piece connected to the pulling element, for example a transverse axis or connecting axis designed as a rod, can be sufficient for the coupling. One end of the pulling element can be coupled and/or connected to a fastening element and/or holding element, for example a pin or rod, of the transmission arrangement. trained transverse axis or connection axis can be sufficient for coupling. The other end of the pulling element can be coupled and/or connected to a fastening element and/or holding element, for example a pin or rod, of the holder. The pulling element can have two identical ends, for example each with an eyelet.

The holder can have holding means for an object. A platform can be provided as a holding means, on which an object can be placed and cannot slip off the platform due to the frictional resistance, as a result of which it is held on the holder. The platform may have a surface that increases holding power to an object. The surface can be a rubber layer, for example. Alternatively or additionally, the holding means can have a device for fixing an object; e.g. a board of nails, a clamping device, a screwing device etc.

The lifting device can have at least one gear arrangement. The gear arrangement can have at least one planetary gear set with a sun gear, planetary gears and a ring gear. The planetary gear can be an epicyclic gear. The planetary gear can be a so-called "compound planetary gear" or "compound planetary gear box". The planetary gear can be self-locking. The ring gear can be a ring gear. The ring gear can have an internal thread and/or internal teeth. The internal teeth of the ring gear can be splines. The ring gear can be made in one piece and/or in one piece, ie from one piece. The ring gear can be designed in several parts, for example in two parts. The ring gear may have an outer ring and an inner ring. The outer ring can be coupled and/or connected to the pulling element. The outer ring can be the fastener and/or holding element, for example a pin or rod, for fastening the pulling element to the outer ring. The inner ring can be a transmission ring, for example a force transmission ring and/or torque transmission ring. The inner ring can have the internal thread and/or the internal toothing. The inner ring can be coupled and/or connected to the outer ring in a torque-proof manner. The inner ring and the outer ring can be coupled and/or connected to one another by means of a connection, such as a tongue and groove connection. The inner ring and the outer ring can be clamped and/or pressed together. The planet gears can be coupled and/or effectively connected to the ring gear and/or inner ring of the ring gear, in particular to the internal thread and/or internal toothing of the ring gear or inner ring.

The planet gears can have an axially inner section. The planet gears can have two axially outer sections. The axially inner portion of the planetary gears may be located axially between the two axially outer portions of the planetary gears. Each section of the planet gears can have an external thread and/or external teeth. For example, only one or both of the axially outer sections of the planet wheel or planet wheels can have an external thread and/or external teeth. The external toothing of the planet gears can be a spline. The axially inner portions of the planetary gears may be coupled and/or connected or meshed with the ring gear. For example, the external threads and/or the external teeth of the axially inner sections of the planet gears can be in engagement with the internal threads and/or internal teeth of the ring gear and/or be coupled to it.

The sun rim may have an axially inner portion. The sun rim may have two axially outward portions. The axially inner section of the sun gear can be arranged axially between the two axially outer sections of the sun gear. The axially inner portion of the sun gear can have a smooth surface and/or have outer surface. The axially outer sections of the sun rim can have an external thread and/or external teeth. For example, only one or both of the axially outer sections of the sun wheel can have an external thread and/or external teeth. The outer teeth of the sun gear can be splines. The axially inner portion of the sun gear is not directly coupled to either the planetary gears or the ring gear. The axially outboard portions of the sun rim may be coupled and/or operatively engaged with the planetary gears, particularly the axially outboard portions of the planetary gears. For example, the external threads and/or the external teeth of the axially outer sections of the sun gear can be in engagement with the external threads and/or the external teeth of the axially outer sections of the planetary gears and/or be coupled thereto.

The planet gears can be two, three, four or more. The planet gears can be rotatably mounted on a planet carrier. The planetary carrier can be rotatably mounted on the main body or be firmly and/or rigidly connected to the main body. The axles of the planetary gears or the planetary carriers can be fixed to the main body.

The gear arrangement can have at least one planetary mount. The transmission arrangement can have, for example, two planetary mounts. The at least one planetary mount can be firmly connected to the main body. The planetary mounts can be arranged opposite one another. The at least one planetary mount can have an inner ring section, for example. The ring portion may be an annular recess. The ring section can have an internal thread and/or internal teeth. The internal toothing of the ring section can be a plug-in toothing. The at least one planetary mount can be produced in one piece and/or in one piece, ie from one part. The at least one planetary mount can be designed in multiple parts, for example in two parts. The at least one planetary mount may include an outer member and an inner ring. The outer member may be fixed to the main body. The inner ring can have the internal thread and/or have the internal teeth. The inner ring can be coupled and/or connected to the outer element in a torque-proof manner. The inner ring and the outer element can be coupled and/or connected to one another by means of a connection, such as a tongue and groove connection. The inner ring and the outer element can be clamped and/or pressed together. The planetary gears can be coupled and/or effectively connected to the at least one planetary mount and/or inner ring of the planetary mount, in particular to the ring section and/or internal thread and/or internal toothing of the ring section or inner ring. The axially outer portions of the planetary gears can be coupled and/or operatively connected or engaged with the at least one planetary mount and/or inner ring of the planetary mount. For example, the external threads and/or the external teeth of the axially outer sections of the planet gears can be in engagement with the ring section or inner ring and/or internal threads and/or internal teeth of the at least one planet holder or inner ring and/or be coupled to it.

The ring gear can be placed next to a planetary mount or between two planetary mounts. The planet wheels and/or the sun wheel can extend axially through the ring wheel and/or the at least one planet holder and/or be arranged therein at least in sections. The translation from the sun gear to the planetary gears can be less than or equal to 1:1. The translation from the planet gears to the ring gear can be less than or equal to 1:1. A self-locking device may mesh with the ring gear inside or outside the planetary gear. Alternatively or additionally, at least one or each of the planet gears can be designed in multiple parts as a self-locking device. The same applies to the sun wheel, which can be designed in several parts as a self-locking device. The tension element can be coupled and/or connected to the ring gear and/or its outer ring in one of the ways described above. The ring gear and/or its outer ring can have the fastening element and/or holding element, for example a pin or rod, for fastening one end of the tension element to the ring gear or outer ring.

The sun gear can be and/or can be coupled in a rotationally fixed manner to, for example, a connecting shaft. The sun gear can have at least one connecting shaft. The at least one connection shaft can be arranged and/or provided on the face side at the edge of the sun. For example, each face of the sun gear can have a connecting shaft. The connecting shaft may be dimensioned and/or designed to be coupled to a bit, i.e. a leno blade. This allows the connection shaft to be connected with a screwdriver or a drill or a crank, such as a hand crank. Alternatively, the connection shaft can be set up for connection to a motor shaft. The connection shaft can have a smaller diameter than a root circle diameter of the sun gear. The connecting shaft can extend laterally out of the planetary gear. The connection shaft can be arranged axially inside the sun gear, for example completely or partially. Alternatively, the sun wheel can have at least one connection recess. The at least one connection recess can be arranged and/or provided on the face side at the edge of the sun. For example, each face of the sun wheel can have a connection recess. The at least one connection recess can be designed to be able to be coupled to a bit, i.e. a leno blade. For example, the at least one connection recess can have a geometry and/or structure complementary to a bit and/or motor shaft. The at least one connection recess can be designed such that the bit and/or the motor shaft can be inserted into the at least one connection recess.

The lifting device can have a motor connected to the transmission arrangement and a motor control unit and/or a force sensor connected to the motor control unit in order to detect a force increase in a force acting on the mount.

The motor can be an electric motor. The motor can be integrated in the lifting device. The motor can be firmly connected to the main body, attached to it and/or integrated into it. The motor can be directly or indirectly operatively connected to the transmission arrangement. The engine can do this be set up to drive the sun gear. For example, the motor can be connected to the sun gear via the connecting shaft and/or connecting recess. The motor may be operable via the motor controller to raise and/or lower the mount. The engine control unit can be connected to the engine via a wired connection or via a wireless connection. The engine control unit can also be part of the engine. The motor control unit itself can be controllable via a wired and/or wireless connection. The lifting device can be designed to raise and/or lower the mount by means of the motor and/or by means of manual operation, such as a screwdriver or crank. With the motor in place, the sun gear can still be driven as cranked with a screwdriver. In addition or as an alternative, the lifting device can be designed so that the mounting can be raised and/or lowered by means of a manual operating device. A manual override device may be provided. The manual operating device can be or comprise a screwdriver or a crank. The hand-operated device can be directly or indirectly operatively connected to the transmission arrangement. Additionally or alternatively, the lifting device can be designed so that the mounting can be raised and/or lowered by means of a drill. The drill may be operatively connected directly or indirectly to the gear assembly.

The force sensor can be a force transducer. At least one force sensor can be provided on the main body, on the bracket, on the tension element, on the gear arrangement and/or on the motor. The force sensor can be a strain gauge. The force sensor can be connected to the engine control unit via a wired and/or wireless connection.

A displacement sensor can also be part of the lifting device. In this case, the displacement sensor can be set up to measure and/or detect a movement of the holder relative to the main body.

The motor control unit can be set up to lift the holder until the force detected by the force sensor suddenly increases and then to stop the lifting movement. The engine control unit can also do this be set up to issue a message about the detected sudden increase in the force detected by the force sensor. The engine control unit can also be set up to continue the lifting movement as soon as it has received a corresponding response to the message. This response can come from an operator or from at least one connected motor control unit, in particular from at least one connected motor control unit of another lifting device. The response can be a plurality of identical responses from a plurality of connected motor control units of other lifting devices. Here, “connected” can refer to a wired and/or wireless connection.

The lifting device can have a power connection and/or an integrated battery/rechargeable battery for operating electrical consumers of the lifting device.

A lifting system can have at least two lifting devices. For example, the lifting system can have three, four, five, six or more lifting devices. The at least two lifting devices can be controlled wirelessly. This can be done via a remote control unit, such as a remote control. In this case, several or all lifting devices can be controlled via a single remote control unit. The remote control unit can control the respective motors of the respective lifting devices.

The at least two lifting devices can be wirelessly synchronized. The respective motor control units can be synchronized with one another wirelessly. The remote control unit can be designed and/or set up to synchronize the at least two lifting devices and/or the respective motor control units or motors. The respective lifting devices can thereby be controlled in such a way that the respective motors drive the respective gear arrangements synchronously. A synchronous movement of the respective holders can thereby be achieved. The lifting system can be set up in such a way that a synchronous drive is only provided after each operatively connected lifting device has recognized a sudden increase in the force acting on its respective holder. Alternatively or additionally, the synchronous drive by a synchronous output of the respective displacement sensors all operatively connected lifting devices to be defined. Thus, the respective brackets can be raised at the same speed. As a result, an object that is lifted by lifting devices of such a system can be lifted horizontally, ie while retaining its original orientation before lifting. The at least two lifting devices can be arranged on the object to be carried. Any number of lifting devices can be or will be attached to the element to be carried at the same time. For example, two, three or more lifting devices can be arranged on the object to be carried. The lifting system can be set up in such a way that a lifting termination of one lifting device leads to a lifting termination of all other lifting devices of the lifting system in order to prevent the object from tipping in this case as well.

In summary and represented in other words, the invention thus results, inter alia, in a device for lifting and/or lowering and/or moving/transporting an object, as well as a system of such devices.

The invention creates the possibility of raising and/or lowering objects in an uncomplicated and rapid manner by means of one or more of the versatile lifting devices described here. As a result, a heavy object can be lifted in order, for example, to be able to access the space below and/or to then be able to move the object more easily, for example by rolling it, or to be able to transport it to another location. The object to be lifted and/or transported can be a smaller object, for example one of the following: stage, platform, furniture such as shelves or chests of drawers, plank, machine, pallet, pedestal, instrument such as a piano, etc.

The following additional advantages can be achieved: safe and reliable lifting of small but heavy stages, platforms or other objects in a confined space; a compact and lightweight design for easy portability; a minimum input torque for a maximum output torque and thus a maximum lifting force, especially when using a planetary gear; the initial distance between ground and object can be very low what is due in particular to the compact design of the invention; a wide range of objects of different heights can be lifted; a power source is not essential as a crank, wrench or drill may be sufficient for lifting; low cost due to a sleek design, especially due to the use of mechanics; Working together as a single unit, especially when using a planetary gear in combination with the traction element; increase in safety and reliability; Depending on the intended use, interchangeable add-ons, in particular through different traction elements and different courses of such traction elements, for example in order to encompass at least part of the object by the traction element, in that the traction element runs under the object, which offers additional lifting options and configurations; if wheels/castors are used, they can be interchanged with wheels/castors for different terrains and/or applications; the lifting height can be varied, for example by designing it higher, which allows moving heavy objects on a higher step and/or stage.

Fig. 1

eine perspektivische Ansicht von oben auf eine Hubvorrichtung,

Fig. 2

eine Vorderansicht der Hubvorrichtung aus Fig. 1,

Fig. 3

eine Rückansicht der Hubvorrichtung aus Fig. 1,

Fig. 4

eine rechte Seitenansicht der Hubvorrichtung aus Fig. 1,

Fig. 5

eine linke Seitenansicht der Hubvorrichtung aus Fig. 1,

Fig. 6

eine Aufsicht der Hubvorrichtung aus Fig. 1,

Fig. 7

eine Untersicht der Hubvorrichtung aus Fig. 1,

Fig. 8

eine Schnittansicht der Getriebeanordnung.

Fig. 9

eine perspektivische Ansicht der Planetenräder und des Sonnenrads, und

Fig. 10

eine perspektivische Ansicht der Planetenräder und des Sonnenrads gekoppelt mit einem Innenring der Planetenhalterung.

Exemplary embodiments of the invention are described in more detail below with reference to figures, which show schematically and by way of example:

1

a perspective view from above of a lifting device,

2

a front view of the lifting device 1 ,

3

a rear view of the lifting device 1 ,

4

a right side view of the lifting device 1 ,

figure 5

a left side view of the lifting device 1 ,

6

a top view of the lifting device 1 ,

7

a bottom view of the lifting device 1 ,

8

a sectional view of the transmission assembly.

9

a perspective view of the planet gears and the sun gear, and

10

a perspective view of the planetary gears and the sun gear coupled to an inner ring of the planetary mount.

1 shows a lifting device 100 for lifting and transporting an object. The lifting device 100 is also designed to lower the object again after it has been lifted. The lifting device 100 comprises a main body 102, a holder 104 for an object, which is attached to the main body 102 and movable relative to the main body 102, and a gear arrangement 106 which is configured to be driven to rotate the holder 104 relative to the main body 102 to move. The lifting device 100 shown here can be rolled and carried.

The main body 102 is formed as a hollow box. Here the main body 102 has a bottom 108, two perpendicularly extending upwards and parallel side walls, these being formed as a left side wall 110 and a right side wall 112, a rear wall extending perpendicularly to the bottom 108 and to the side walls 110, 112 114, and finally a ceiling 116 parallel to the floor 108. The main body 102 can be monolithic or, as in FIG 1 shown, be designed so that it is made up of several components that are firmly connected to one another. These connections can be non-destructively separable, for example by means of screws, or inseparable, for example by means of weld seams. The bottom 108 can be telescopic. Here the bottom 108, the side walls 110, 112, the rear wall 114 and the top 116 represent a box shape that is open on one side, ie towards the front , as shown here, be plate-shaped. The rear wall 114 can be omitted. The side walls 110, 112 can be identical components.

A left linear guide 118 designed as a lifting column and a right linear guide 120 designed as a lifting column extend parallel to one another and parallel to the side walls 110, 112 between the floor 108 and the top 116. The linear guides 118, 120 can be fixed or fastened to the rear wall 114 be. The linear guides 118, 120 can alternatively be integrated into the side walls 110, 112, ie on the facing sides of the side walls 110, 112 and/or on the opposite sides of the side walls 110, 112. In addition, these rail-shaped linear guides do not have to extend from the floor 108 to the ceiling 116, but can also end at a distance from the floor 108 and/or the ceiling 116.

The holder 104 has a holding means 122 designed as a platform, which is firmly attached to a left linear bearing 124 designed as a linear bearing block and a right linear bearing 126 designed as a linear bearing block. The linear bearings 124, 126 are mounted in a linearly movable manner on the respective linear guides 118, 120, which are designed as lifting columns. The holding means 122, as here, can be completely or alternatively also only partially lowered into a floor recess 128. Of course, the holding means 122 can alternatively or additionally have a device for fixing an object; e.g. a board of nails, a clamping device, a screwing device etc.

The gear arrangement 106 has two oppositely arranged planetary mounts 130 which are fixedly connected to the cover 116 . The planetary mounts 130 and the ceiling 116 may be monolithic or, as here, constitute separate components. Their connection can be non-destructively separable, for example by means of screws, or inseparable, for example by means of weld seams. The gear arrangement 106 also has a planetary gear 132 with a sun gear 134, four planetary gears 136 and a ring gear 138 designed as a ring gear. The sun gear 134 is monolithically coupled to a connecting shaft 140 here. However, another form of coupling, ie connection, is also possible. For example, the sun gear 134 and the connection shaft 140 can be connected to one another as separate components. Here, too, their connection can be non-destructively separable, for example by means of screws, or inseparable, for example by means of weld seams. The connecting shaft 140 is accessible from the outside here, but can also be fully or partially countersunk in the sun gear 134 . The ring gear 138 is arranged between the two planetary mounts 130 and has an internal toothing which is coupled to an external toothing of the planetary gears 136 . The ring gear 138 further includes a fastener 143 and/or retaining member 143, for example spigot or rod for attaching the tension member 142 to the ring gear 138. Alternatively, a connecting piece connected to the tension element 142, for example a transverse axis or connecting axis designed as a rod, can be sufficient for the coupling. The pull element 142 can have two identical ends, for example each with an eyelet. For this purpose, in the description of 6 and 7 even more detailed.

The planet gears 136 and the sun gear 134 are also coupled to one another via external gearing. The planet gears 136 and the sun gear 134 extend in the axial direction through annular recesses 144 of the planet mounts 130 and through the ring gear 138. The planet mounts 130 are designed in two parts and each have an outer element and an inner ring which is firmly connected to the outer element. The outer element is firmly connected to the ceiling 116 . The inner rings of the planet holders 130 have an internal toothing which is coupled to an external toothing of the planet gears 136 .

It is also possible for the ring gear 138 to be located entirely within a transmission housing. For this purpose, the transmission housing can have an opening through which the tension element 142 runs from outside the transmission housing for connection to the ring gear 138 .

The elevator 100 may be self-locking to block movement of the bracket 104 relative to the main body 102 when the gear assembly 106 is not being driven. The self-locking can be implemented by the gear arrangement 106 and/or its planetary gear 132 .

Alternatively, a self-locking device inside or outside planetary gear 132 may engage ring gear 138 . Alternatively or additionally, at least one or each of the planet gears 136 can be designed in multiple parts as a self-locking device. The same applies to the sun wheel 134, which can be designed in several parts as a self-locking device. Alternatively or additionally, the self-locking of one of the guides of the bracket 104 to Main body 102, for example, between the linear guides 118, 120 and the linear bearings 124, 126 may be provided.

An elongate pull member 142 is shown coupled to the ring gear 138 and to the bracket 104 at a distance therefrom. In the case shown, the pulling element 142 is connected to the ring gear 138 at one longitudinal end and to the holding means 122 at the other longitudinal end. These two connections are in 6 and in 7 shown closer. A guide opening 145 in the cover 116 serves to guide the tension element 142.

The pulling element 142 can be, for example, one of the following: belt, belt, chain, rope, band, pulling strap, etc. The pulling element 142 can be fixed or non-destructively interchangeable with the one part that is movable relative to the main body 102, here with the ring gear 138, of the gear arrangement 106 and/or to the holder 104, for example to the holding means 122. The other end of tension member 142 may be coupled to bracket 104 at or near the center of gravity of bracket 104, as shown in FIG 7 is shown. Alternatively or additionally, the transmission arrangement 106 can have a receptacle for the other end of the pulling element 142 , while the holder 104 has a guide for the pulling element 142 . As a result, the pulling element 142 can be coupled at both of its ends to the gear arrangement 106 or the ring gear 138 and can be/are guided between them around or through the holder 104, optionally also around an object on the holder 104. If the mount 104 has a holding means 122 designed as a platform, the center of gravity can be located in the mount 104 to the side of the platform.

Rollers 146 on the side of the floor 108 facing away from the ceiling 116 ensure that the lifting device 100 can be rolled. The lifting device 100 is portable in that its size and/or weight allows it to be lifted by a user and moved to another location in this state.

In this case, the rollers 146 can be attached to the main body 102 in a fixed manner or can be exchanged in a non-destructive manner. The rollers 146 can be designed for a specific surface, for example depending on the surface finish and degree of hardness of the subsoil. In addition, the rollers 146 can be adapted to the load to be lifted due to the object. The rollers 146 can be two or more, eg, three, four, five, six, etc. When there are only two rollers 146, they can be coaxial or collinear. The rollers 146 can be drivable, for example by means of a motor or a plurality of motors which is/are provided on the lifting device 100 for this purpose. At least some of the rollers 146 may also be steerable, such as powered or manual, such as by applying lateral pressure to the main body 102. The drive and/or steering may be remotely controllable. The rollers 146 can be moved into and out of the lifting device 100 and/or its floor 108 .

The size and/or the weight of the lifting device 100 can be selected such that the lifting device 100 is mobile, can be lifted and transported by a user. The hoist 100 may have at least one handle disposed on the main body 102 . Two handles can be provided on opposite lateral sides of the main body 102, e.g. the side walls 110, 112, and/or one handle on an upper side of the main body 102, e.g. the ceiling 116. The handles can be recesses or indentations in the main body 102 . Such recesses can be seen here, for example, on the outside of the two side walls 110, 112.

2 FIG. 12 shows a front view of the lifting device 100. FIG 1 . The only difference between this and all other figures compared to the illustration of the lifting device 100 in 1 is that instead of the rollers 142 designed as feet, ground clearance structures 152 are present.

The ground clearance structures 152 can be designed as sliding feet or, as shown here, as ball rollers, which enable the lifting device 100 to be moved on a surface. As shown here, the lifting device 100 can be supported on and spaced from a subsurface only by means of ground spacing structures 152 . The floor clearance structures 152 may be interchangeably attached to the floor 108 .

3 FIG. 12 shows a rear view of the lifting device 100. FIG 1 . It can be seen here that the planetary mounts 130 are screwed not only to the cover 116 but also to the rear wall 114 .

4 FIG. 12 shows a right side view of the lifting device 100. FIG 1 . The planetary gear 132 is clearly visible here. While the sun gear 134 is denoted by an "S", the planetary gears 136 are numbered "P1" through "P4". Planetary gear 132 can be equipped with any number of planet gears 136.

figure 5 FIG. 12 shows a left side view of the lifting device 100. FIG 1 . This page essentially corresponds to a mirror image of the previous one in 4 shown side of the lifting device 100.

6 FIG. 12 shows a top view of the lifting device 100. FIG 1 . It can be seen that the cover 116 is connected to the rear wall 114 by means of two screw connections and to the left side wall 110 and the right side wall 112 by means of one screw connection each. The screw connection of the planetary mounts 130 to the cover 116 is also represented by two concentric circles. Finally, the connection of the upper end of the pull element 142 to the ring gear 138 can be seen. For this purpose, the pulling element 142 has an eyelet at its upper end. An upper connecting axis 154 , such as a pin or rod, which is firmly connected to the ring gear 138 runs through this eyelet, which is cylindrical in this case. A needle bearing which is fixedly coupled to the connecting axle 154 can be provided between the eyelet and the upper connecting axle 154 .

7 FIG. 12 shows a bottom view of the lifting device 100. FIG 1 . It can be seen that the base 108 is connected to the rear wall 114 by means of two screw connections and to the left side wall 110 and the right side wall 112 by means of one screw connection each. Each bolted connection is represented by two concentric circles. Finally, the connection of the lower end of the pulling element 142 to the holding means 122 can be seen. For this purpose, the pulling element 142 has an eyelet at its lower end. A lower connecting axis 156, which is fixed to the holding means 122 connected is. A needle bearing which is fixedly coupled to the connecting axle 156 can be provided between the eyelet and the lower connecting axle 156 .

8 shows a sectional view of the gear arrangement 106 through the ring gear 138. The ring gear 138 has the fastening element/retaining element 143 for fastening the pulling element 142. Furthermore, the ring gear 138 is formed in two parts and has an outer ring 158 and an inner ring 160 coupled to the outer ring 158 in a rotationally fixed manner, for example via a tongue and groove connection. The inner ring 160 of the ring gear 138 has an internal toothing 162 which is coupled to the external toothing of the planetary gears 136 . The edge of the sun is smooth in the area inside the ring gear 138, that is to say without teeth.

9 shows a perspective view of the assembly of planetary gears 136 and sun gear 134. The planetary gears 136 each have an axially inner section 164 with external teeth and two axially outer sections 166 with external teeth. The axially inner sections 164 of the planet gears 136 are each arranged axially between the respective two axially outer sections 166 of the planet gears 136 . The external teeth of the axially inner sections 164 of the planet gears 136 are coupled or engaged with the internal teeth of the ring gear 138 or its inner ring 160 . The sun gear 134 has an axially inner section 168 with a smooth outer surface/surface and two axially outer sections 170 with external teeth. The axially inner section 168 of the sun gear 134 is arranged axially between the two axially outer sections 170 of the sun gear 134 . The external teeth of the axially outer portions 170 of the sun gear 134 are coupled or engaged with the external teeth of the axially outer portions 166 of the planetary gears 136 .

10 shows a perspective view of the assembly of planetary gears 136, sun gear 134 and the annular recess 144, designed as an inner ring 172, of the planetary mounts 130. The arrangement of the planetary gears 136 and the sun gear 134 corresponds to that in FIG 9 assembly shown. The inner ring 172 of the planet holders 130 is designed in such a way that it can be connected to an outer element (cf. 1 ) of the planetary mounts 130 can be connected in a rotationally fixed manner, for example via a tongue and groove connection. The inner ring 172 also has an inner toothing 174 . The axially outer sections 166 of the planet gears 136 and the axially outer section 170 of the sun gear 134 protrude into the inner ring 172 of the planet holder 130 . The external teeth of the axially outer sections 166 of the planet gears 136 are coupled or engaged with the internal teeth 174 of the inner ring 172 of the planet holder 130 .

If the described lifting device 100 is used by an operator, the procedure is as follows:
First, the user rolls and/or carries the lifting device 100 to the desired location and places the lifting device 100 so that the bracket 104 is able to support the object to be lifted. In this case, the holding means 122 designed as a platform is pushed under the object to be lifted.

Next, the user connects the connecting shaft 140 with a screwdriver or drill to rotate the sun gear 134 can. Alternatively, the connection shaft 140 can be connected to a motor. The sun gear 134 can be rotated in a lifting direction 148 or in a lowering direction 150 . In 1 the lifting device 100 is in its basic state in which the holding means 122 cannot be lowered any further. Therefore, the sun gear 134 is rotated in the lifting direction 148 . This causes the ring gear 138 to rotate. The tension member 142 attached to the ring gear 138 is wound onto the ring gear 138, thereby raising the bracket 104 toward the ceiling 116. Once the bracket 104 has reached the object, the required lifting torque increases.

The user can now continue to turn the sun gear 134 in the lifting direction 148 to lift the object. When the object is fully raised, the user can very easily move the object spatially thanks to the rollers 146.

If the user wants to lower the object again, he must turn the sun gear 134 in the lowering direction 150 . This unwinds the pull member 142 from the ring gear 138 and lowers the bracket 104 . Finally, the lifting device 100 can be removed from the object.

The lifting device 100 taught here can additionally have a motor connected to the gear arrangement 106 and a motor control unit as well as a force sensor connected to the motor control unit in order to detect a force increase in a force acting on the bracket 104 .

The motor can be an electric motor. The motor can be integrated into the lifting device 100 . The motor may be fixed to, attached to, and/or integrated with the main body 102, such as above or below the ceiling 116. The motor may be operatively connected to the gear assembly 106 directly or indirectly. The motor may be configured to drive sun gear 134 . For example, the motor can be connected to the sun gear 134 via the connection shaft 140 . The motor may be operable via the motor controller to raise or lower the mount 104 . The engine control unit can be connected to the engine via a wired connection or via a wireless connection. The engine control unit can also be part of the engine. The engine control unit may itself be controllable via a wired or wireless connection.

The force sensor can be a force transducer. At least one force sensor can be provided on the main body 102, on the bracket 104, on the tension element 142, on the gear arrangement 106 and/or on the motor. The force sensor can be a strain gauge. The force sensor can be connected to the engine control unit via a wired or wireless connection.

A displacement sensor can also be part of the lifting device 100 . In this case, the displacement sensor can be set up to measure a movement of the holder 104 relative to the main body 102 .

The motor control unit can be set up to lift the holder 104 until there is a sudden increase in the force detected by a force sensor and then to stop the lifting movement. The engine control unit can also be set up to output a message about the detected sudden increase in the force detected by a force sensor. The engine control unit can also be set up to continue the lifting movement as soon as it has received a corresponding response to the message. This response can come from an operator or from at least one connected motor control unit, in particular from at least one connected motor control unit of another lifting device 100 . In this case, the response can be a plurality of identical responses from a plurality of connected motor control units of other lifting devices 100 . Here, too, “connected” denotes a wired or wireless connection.

The lifting device 100 can have a power connection and/or an integrated battery for operating electrical consumers, such as the motor, of the lifting device 100 .

If several lifting devices 100 are used simultaneously to lift a single object, then these lifting devices 100 form a lifting system.

The at least two lifting devices 100 of such a lifting system can be controlled wirelessly.

This can be done via a remote control unit, for example a remote control and/or a mobile device, such as a mobile phone, cell phone, tablet or the like. The remote control unit can have a corresponding controller with a processor and/or storage medium and/or a corresponding computer program product, for example an app. In this case, several or all lifting devices 100 can be controlled via a single remote control unit. The controller can control the respective motors of the respective lift devices 100 .

The at least two lifting devices 100 can be wirelessly synchronized. The respective motor control units can be synchronized with one another wirelessly. As a result, the respective lifting devices 100 can be controlled in such a way that the respective motors drive the respective gear assemblies 106 synchronously. A synchronous movement of the respective holders 104 can thereby be achieved. The lifting system can be set up in such a way that a synchronous drive is only provided after each operatively connected lifting device 100 has recognized a sudden increase in the force acting on its respective holder 104 . Alternatively or additionally, the synchronous drive can be defined by a synchronous output of the respective displacement sensors of all operatively connected lifting devices 100 . Thus, the respective holders 104 can be raised or lowered at the same speed. This allows an object being lifted or lowered by the lifting devices 100 of such a system to be lifted horizontally, i.e. retaining its original orientation prior to lifting. The lifting system can be set up in such a way that a lifting termination of one lifting device 100 leads to a lifting termination of all other lifting devices 100 of the lifting system in order to prevent the object from tipping in this case as well.

In particular, “may” denotes optional features of the invention. Accordingly, there are also developments and/or exemplary embodiments of the invention which additionally or alternatively have the respective feature or features.

If necessary, isolated features can also be selected from the combinations of features disclosed here and used in combination with other features to delimit the subject matter of the claim, eliminating any structural and/or functional relationship that may exist between the features. The order and/or number of steps of the method can be varied.

Reference sign

100

lifting device

102

main body

104

bracket

106

gear arrangement

108

Floor

110

left side wall

112

right side wall

114

back panel

116

Ceiling

118

left linear guide

120

right linear guide

122

holding means

124

left linear bearing

126

right linear bearing

128

floor recess

130

planet mounts

132

planetary gear

134

sun gear

136

planet gears

138

ring gear

140

connecting shaft

142

tension element

143

Fastening element / retaining element

144

annular recesses

145

guide hole

146

roll

148

lifting direction

150

direction of lowering

152

ground clearance structures

154

upper connection axis

156

lower connection axis

158

ring gear outer ring

160

inner ring of the ring gear

162

Internal ring gear

164

axially inner portions of the planet gears

166

axially outer portions of the planet gears

168

axially inner section of the sun gear

170

axially outboard portions of the sun gear

172

Planetary mount inner ring

174

Internal toothing of the inner ring of the planetary holder

Claims (11)

Lifting device (100) for lifting and/or transporting an object, comprising: - a main body (102), - a holder (104) for an object, which is attached to the main body (102) and movable relative to the main body (102), and - a gear assembly (106) adapted to be driven to move the bracket (104) relative to the main body (102), characterized in that
the lifting device (100) can be rolled and/or carried. Lifting device (100) according to claim 1, characterized in that
the lifting device (100) has a self-locking function to block movement of the bracket (104) relative to the main body (102) when the gear assembly (106) is not being driven. Lifting device (100) according to at least one of the preceding claims,
characterized in that
the lifting device (100) has an elongate traction element (142) for moving the holder (104) relative to the main body (102), the traction element (142) having a part movable relative to the main body (102), such as a ring gear (138), the Transmission arrangement (106) and at a distance from this with the bracket (104) can be coupled. Lifting device (100) according to at least one of the preceding claims,
characterized in that
the holder (104) has holding means (122) for an object. Lifting device (100) according to at least one of the preceding claims,
characterized in that
the gear arrangement (106) has a planetary gear (132) with a sun gear (134), planetary gears (136) and a ring gear (138). Lifting device (100) according to Claim 5, characterized in that the sun gear (134) is coupled in a torque-proof manner to a connecting shaft (140). Lifting device (100) according to at least one of the preceding claims,
characterized in that
the lifting device (100) has a motor connected to the transmission arrangement (106) and a motor control unit. Lifting device (100) according to claim 7, characterized in that
the lifting device (100) has a force sensor connected to the motor control unit in order to detect a force increase in a force acting on the bracket (104). Lifting system, characterized in that
the lifting system comprises at least two lifting devices (100) according to at least one of the preceding claims. Lifting system according to claim 9, characterized in that
the at least two lifting devices (100) can be controlled wirelessly. Lifting system according to claim 9 or 10, characterized in that
the at least two lifting devices (100) can be wirelessly synchronized.

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