Lifting device and method for lifting self-climbing systems for erecting structures

Abstract

The invention relates to a lifting device for lifting self-climbing systems for erecting structures, comprising a differential lead screw, wherein the differential lead screw has a first threaded portion with a first thread pitch and a second threaded portion with a second thread pitch, the first thread pitch being different from the second thread pitch; a first climbing shoe having a first threaded nut, and a second climbing shoe having a second threaded nut, wherein the first threaded nut and the second threaded nut are each rotationally fixedly mounted respectively in the first climbing shoe and in the second climbing shoe and each have an internal thread, wherein the internal threads of the first and second threaded nuts are designed in such a way that the first threaded portion and the second threaded portion can be screwed respectively in the first and second threaded nuts in order to convert a rotational movement of the differential lead screw into a translational movement of the lifting device. The invention also relates to a climbing shoe for lifting devices in the construction industry, a self-climbing system and a method for lifting a self-climbing system.

Description

Doka GmbH, September 3, 2025 120580P1201 PC LIFTING DEVICE AND METHOD FOR LIFTING SELF-CLIMBING SYSTEMS FOR ERECTING BUILDINGS

[0001] The invention relates to a lifting device for lifting self-climbing systems for erecting structures, comprising a differential thread spindle, wherein the differential thread spindle has a first threaded section with a first thread pitch and a second threaded section with a second thread pitch, wherein the first thread pitch and the second thread pitch are different; a first climbing shoe with a first threaded nut and a second climbing shoe with a second threaded nut, wherein the first threaded nut and the second threaded nut each have an internal thread which is designed such that the first threaded section and the second threaded section are each screwable in the first and in the second threaded nut in order to convert a rotary movement of the differential thread spindle into a translational movement of the lifting device.Furthermore, the invention relates to a climbing shoe for lifting devices in the construction sector, a self-climbing system and a method for lifting a self-climbing system.

[0002] Self-climbing systems are frequently used in the construction of tower-like structures, such as skyscraper walls, bridge piers, towers, or dams. Unlike conventional climbing systems, these do not require a crane to move a section of the structure to a higher one. Instead, self-climbing systems are lifted vertically along the structure using a lifting device mounted on the structure itself; in other words, the self-climbing systems "climb" along the structure's wall and are thus moved.

[0003] Prior art lifting devices for self-climbing systems typically include climbing rails that guide the self-climbing system along the structure, climbing shoes that are attached to anchoring elements in the structure to which the climbing rails are attached and into which the self-climbing system is suspended for attachment to the structure, and a climbing drive, usually hydraulic. To lift the self-climbing system from a lower section of the structure to the next higher section, the attachment of the self-climbing system to the lower climbing shoe, which is attached to the lower section, must generally be released, the self-climbing system lifted via the climbing drive, and suspended and secured in the climbing shoe of the next higher section. Doka GmbH, September 3, 2025 120580P1201 PC The transfer of load from the lower climbing shoe to the next higher one is therefore always done manually by detaching the device from the lower climbing shoe and attaching it to the next higher one. Due to their design, such lifting devices only allow for step-by-step, i.e., discontinuous, climbing of self-climbing systems, from one climbing shoe to the next.

[0004] Lifting devices for lifting self-climbing systems based on threaded spindles are known from the prior art.

[0005] Document DE 3318023 A1 relates to a lifting device for climbing formwork, primarily for tower-like concrete structures, for the section-by-section climbing of formwork arranged around the tower-like structure or wall-like concrete structures with inner and outer formwork, characterized in that the formwork beams are moved mechanically and synchronously vertically with the formwork by means of, for example, threaded spindles (rack and pinion or similar devices) which are movably connected to a steel frame resting on the tower-like structure or, in the case of wall-like structures, via a steel shoe firmly connected to the steel frame, which is clamped to the wall-like structure via spindles or other suitable devices.

[0006] Document US 4,530,648 A relates to a lifting device for wall climbing formwork for handling inner and outer formwork units during the successive casting of horizontal slabs of a concrete wall structure, comprising: (a) a frame assembly with an outer formwork unit mounted thereon, (b) a tubular mast movably mounted on the frame assembly for relative up-and-down movement, the mast having an upper section and a lower section, (c) a reversible power transmission device within the upper section of the mast comprising a rotatable drive device and a linearly movable driven unit, (d) a device detachably connecting the driven unit to the frame assembly, (e) wherein the power transmission device,when the driven unit is detachably connected to the frame assembly and the outer formwork unit and the inner formwork unit are attached to and connected with the wall structure, is rotated in one direction to move the mast section upwards relative to the frame assembly, and, when the lower mast section is attached to the wall structure and the driven unit is detached from the frame assembly, is rotated in the opposite directions to move the driven unit linearly up and down within the upper mast section, (f) a boom on the upper, Doka GmbH, September 3, 2025 120580P1201 PC Mast section with a lifting device for the inner formwork unit, and (g) a device for actuating the lifting device in response to the upward and downward movement of the driven unit relative to the frame device.

[0007] Document CN 110284703 A relates to a lightweight, screw-supported climbing formwork system mounted on a pier body, characterized in that it comprises: a climbing scaffold with a vertically arranged first vertical frame, a horizontally arranged horizontal frame, a horizontally arranged first working platform, and a plurality of inclined first diagonal braces; wherein the first vertical frame passes through a connecting element that is detachably connected to the pier body, wherein one end of the horizontal frame is connected to the upper end of the first vertical frame, wherein the first working platform is arranged at the upper end of the horizontal frame, and wherein the plurality of the first diagonal braces are arranged side by side, with each pair of ends of the first diagonal braces being connected to a bottom of the horizontal frame and a bottom end of the first vertical frame, respectively;a movable formwork support comprising a vertically arranged second vertical frame and a return mechanism, wherein the second vertical frame is attached to the top of the first working platform by means of the return mechanism and the second vertical frame is able to move horizontally towards the pier body or retract horizontally by means of the return mechanism; formwork arranged vertically on a side facing away from the pier body and connected to the second vertical frame;and a climbing device comprising a plurality of sets of screw drive mechanisms, a motor and a connecting mechanism, each set of screw drive mechanisms comprising a mounting base, a vertically arranged screw and a worm gear, the mounting base being detachably attached to the pillar body, the screw being detachably connected to the mounting base, the mounting base being able to secure the screw and the worm gear being fixed to the underside of the first vertical frame and arranged near one end of the pillar body, the worm gear being provided with a worm wheel nut and the worm wheel nut being screwed onto the screw;wherein a number of worm gears are connected to each other by a connecting mechanism, wherein the motor is connected to the connecting mechanism such that, when the motor is running, the connecting mechanism is able to drive a number of worm gears synchronously. Doka GmbH, September 3, 2025 120580P1201 PC

[0008] It is an object of the invention to provide an improved lifting device for lifting self-climbing systems for the construction of buildings. In particular, it is an object of the invention to provide a lifting device that enables continuous lifting of the self-climbing system.

[0009] This problem is solved by the doctrine of independent claims. Advantageous embodiments are claimed in dependent claims.

[0010] A first aspect of the invention relates to a lifting device for lifting self-climbing systems for erecting structures, comprising: a differential thread spindle, wherein the differential thread spindle has a first thread section with a first thread pitch and a second thread section with a second thread pitch, wherein the first thread pitch and the second thread pitch are different;a first climbing shoe with a first threaded nut and a second climbing shoe with a second threaded nut, wherein the first threaded nut in the first climbing shoe and the second threaded nut in the second climbing shoe are each mounted in a rotationally fixed manner and each have an internal thread, wherein the internal thread of the first threaded nut is designed in such a way that the first threaded section and the second threaded section are each screwable in the first threaded nut, and the internal thread of the second threaded nut is designed in such a way that the first threaded section and the second threaded section are each screwable in the second threaded nut in order to convert a rotary movement of the differential threaded spindle into a translational movement of the lifting device.

[0011] A second aspect of the invention relates to a climbing shoe for lifting devices in the construction sector, in particular for a lifting device according to the first aspect of the invention, wherein the climbing shoe has a threaded nut with an internal thread, wherein the threaded nut is divisible in at least substantially axial direction into a first threaded nut part and a second threaded nut part in order to be converted from a composite state to a divided state, wherein the first threaded nut part has a partial thread of the internal thread, and wherein the second threaded nut part has a partial thread of the internal thread. Doka GmbH, September 3, 2025 120580P1201 PC

[0012] A third aspect of the invention relates to a self-climbing system for erecting structures, comprising a lifting device according to the first aspect of the invention, wherein the drive is preferably connectable to one end of the second threaded section of the differential threaded spindle, and wherein, in the intended use of the lifting device, the first threaded section is located in a vertical direction above the second threaded section.

[0013] A fourth aspect of the invention relates to a method for lifting a self-climbing system for erecting structures with a lifting device according to the first aspect of the invention, in particular with a first climbing shoe and a second climbing shoe according to the second aspect of the invention, comprising the following steps: lifting the self-climbing system via the lifting device by rotating the differential threaded spindle, preferably by the drive, wherein the first threaded section of the differential threaded spindle is screwed into the second threaded nut of the second climbing shoe, which is mounted on a second anchoring element of a structure section B, and wherein the second threaded section of the differential threaded spindle is then screwed into the first threaded nut of the first climbing shoe, which is mounted on a first anchoring element of a structure section A adjacent to structure section B;Disassemble, as soon as a load transfer from the first climbing shoe to the second climbing shoe occurs, preferably as soon as the first threaded nut of the first climbing shoe is relieved of load by the differential threaded spindle, the first climbing shoe with the first threaded nut from the differential threaded spindle and the first anchoring element of structure section A; and assemble one, in particular the first, climbing shoe with one, in particular the first, threaded nut on a third anchoring element of a structure section C also adjacent to structure section B, wherein the first structure section A and the third structure section C each border the second structure section B in the axial direction of the differential threaded spindle.

[0014] Self-climbing systems according to the invention are preferably crane-independent devices used in the construction of structures, particularly tower-like structures, and are preferably lifted vertically along the structure by means of a lifting device mounted on the structure, i.e., "climbing" along the structure wall. Self-climbing systems according to the invention can, for example, be self-climbing formwork systems for concreting the structure, protective shield systems for protecting construction site personnel, a facade, and / or parts of the structure without a facade. Doka GmbH, September 3, 2025 120580P1201 PC as well as self-climbing facade scaffolding or platforms. In the construction industry, self-climbing formwork systems are often simply referred to as climbing formwork systems, even though this is not entirely accurate, as the term climbing formwork system also includes those that are not designed to be self-climbing. The same applies to self-climbing systems.

[0015] Screwable within the meaning of the invention preferably means that an external thread can engage in an internal thread in such a way that, when the component having the internal thread is fixed, a rotational movement of the component having the external thread leads to a translational movement of the component having the external thread, or that, when the component having the external thread is fixed, a rotational movement of the component having the internal thread leads to a translational movement of the component having the internal thread.

[0016] Climbing shoes according to the invention are preferably designed to temporarily attach lifting devices for lifting self-climbing systems to the structure via an anchoring element installed within the structure. The climbing shoes preferably do not move with the lifting device, but are mounted to the anchoring elements, particularly manually.

[0017] Self-locking in the sense of the invention preferably refers to the property of two adjacent bodies to prevent slipping or twisting of the two bodies relative to each other by means of a resistance caused by static friction.

[0018] A self-climbing formwork system according to the invention is preferably a crane-independent formwork system for concreting structural elements, which is moved to the next higher concreting section by a lifting device.

[0019] A drive according to the invention can be designed as an electric, hydraulic or pneumatic drive and / or be manually operable.

[0020] The invention is based on the premise that, due to the different thread pitches of the thread sections of the differential threaded spindle, an automatic unloading of the first threaded nut located in the first climbing shoe and an automatic loading of the second threaded nut located in the second climbing shoe occurs as soon as, through rotation of the differential threaded spindle, the second Doka GmbH, September 3, 2025 120580P1201 PC The threaded section of the differential threaded spindle reaches the first threaded nut mounted in the first climbing shoe and continues to rotate.

[0021] Preferably, the internal thread of the first threaded nut has a first internal thread pitch and the internal thread of the second threaded nut has a second internal thread pitch, wherein the first internal thread pitch and the second internal thread pitch are the same.

[0022] This ensures that the differential threaded spindle can be screwed into the first threaded nut and the second threaded nut, and that an automatic load transfer from the first threaded nut, which is located in the first climbing shoe, to the second threaded nut, which is located in the second climbing shoe, occurs as soon as, through rotation of the differential threaded spindle, the first threaded nut, which is located in the first climbing shoe, is in the second threaded section of the differential threaded spindle.

[0023] Preferably, the first threaded nut part and the second threaded nut part have a fit which defines a position of the first threaded nut part and the second threaded nut part in the assembled state of the threaded nut.

[0024] This makes it easier to move the threaded nut from its split state to its assembled state. Furthermore, the fit ensures that the first and second threaded nut parts are assembled in a precisely defined position, so that the partial thread of the first threaded nut part, together with the partial thread of the second threaded nut part, forms the internal thread of the threaded nut.

[0025] The method according to the fourth aspect of the invention enables the continuous raising and lowering of a self-climbing system on a structure. Since the lifting device is supported by the threaded nuts into which the differential threaded spindle is screwed, it is not necessary to unhook the lifting device from the first climbing shoe and hook it into the second climbing shoe to raise the self-climbing system from one section of the structure to the next higher section. Thus, it is not necessary to raise the self-climbing system across the entire distance between two suspension points, i.e., to move the self-climbing system from one suspension point to the other. Only the climbing shoes with the threaded nuts are removed from one suspension point and mounted at the next. The load redistribution from the first Doka GmbH, September 3, 2025 120580P1201 PC The transfer of the first climbing shoe to the second climbing shoe occurs automatically as soon as the first threaded nut, which is stored in the first climbing shoe, is located in the second threaded section of the differential threaded spindle due to rotation of the differential threaded spindle. This allows the lifting device to be stopped in any position, enabling work to be carried out on the structure, particularly formwork, concreting, etc.

[0026] In an advantageous embodiment of the lifting device according to the first aspect of the invention, this further comprises a drive, wherein the drive can be connected to one of the two ends of the differential thread spindle and is configured to drive the lifting device by rotating the differential thread spindle.

[0027] By providing a drive mechanism, the lifting device can be moved automatically.

[0028] In a further advantageous embodiment of the lifting device according to the first aspect of the invention, the first thread pitch is larger than the second thread pitch.

[0029] This results in a situation where, with the same thread pitch of the internal thread of the first threaded nut and the internal thread of the second threaded nut, a constant rotational speed of the differential threaded spindle along its length causes a higher translational speed of the first threaded section compared to the second threaded section. This leads to a load redistribution from the first threaded nut, located in the first climbing shoe, to the second threaded nut, located in the second climbing shoe, as soon as, through rotation of the differential threaded spindle, the first threaded nut located in the first climbing shoe is in the second threaded section of the differential threaded spindle and the differential threaded spindle has completed a sufficient number of rotations for the load redistribution from the first climbing shoe to the second climbing shoe to occur.

[0030] In a further advantageous embodiment of the lifting device according to the first aspect of the invention, the first threaded nut is divisible in at least a substantially axial direction into a first threaded nut part and a second threaded nut part in order to be transformed from a composite state, in which the first threaded nut is configured to receive the differential threaded spindle, into a split state, in which the first threaded nut can be removed from the differential threaded spindle at any axial position of the differential threaded spindle. Doka GmbH, September 3, 2025 120580P1201 PC, wherein the first threaded nut part of the first threaded nut has a partial thread of the internal thread of the first threaded nut, and wherein the second threaded nut part of the first threaded nut has a partial thread of the internal thread of the first threaded nut.Furthermore, the second threaded nut is divisible in at least an essentially axial direction into a first threaded nut part and a second threaded nut part in order to be converted from a composite state in which the second threaded nut is configured to receive the differential threaded spindle to a divided state in which the second threaded nut can be removed from the differential threaded spindle at any axial position of the differential threaded spindle, wherein the first threaded nut part of the second threaded nut has a partial thread of the internal thread of the second threaded nut, and wherein the second threaded nut part of the second threaded nut has a partial thread of the internal thread of the second threaded nut.

[0031] Preferably, the first threaded nut portion and the second threaded nut portion of the first threaded nut have a fit that defines a position of the first threaded nut portion and the second threaded nut portion in the assembled state of the first threaded nut. Preferably, the first threaded nut portion and the second threaded nut portion of the second threaded nut also have a fit that defines a position of the first threaded nut portion and the second threaded nut portion in the assembled state of the second threaded nut.

[0032] This facilitates the process of moving the first and second threaded nuts from their separated to their assembled state. Furthermore, the precise fit of the first and second threaded nut sections ensures that they are assembled in a precisely defined position, so that the partial thread of the first threaded nut section, together with the partial thread of the second threaded nut section, forms the internal thread of the first threaded nut.Furthermore, the fitting of the first threaded nut part and the second threaded nut part of the second threaded nut ensures that the first threaded nut part and the second threaded nut part of the second threaded nut are assembled in a precisely defined position, so that the partial thread of the first threaded nut part together with the partial thread of the second threaded nut part forms the internal thread of the second threaded nut. Doka GmbH, September 3, 2025 120580P1201 PC

[0033] In a further advantageous embodiment of the lifting device according to the first aspect of the invention, the first threaded nut has a spherical section on one end face, wherein the first climbing shoe has a spherical contact surface which forms a ball joint with the spherical section of the first threaded nut. Furthermore, the second threaded nut has a spherical section on one end face, wherein the second climbing shoe has a spherical contact surface which forms a ball joint with the spherical section of the second threaded nut.

[0034] The ball joint formed between the spherical contact surface of the first climbing shoe and the spherical section of the first threaded nut allows for constraint-free alignment of the first threaded nut along the differential threaded spindle. The ball joint formed between the spherical contact surface of the second climbing shoe and the spherical section of the second threaded nut allows for constraint-free alignment of the second threaded nut along the differential threaded spindle.

[0035] In a further advantageous embodiment of the lifting device according to the first aspect of the invention, the first climbing shoe has a blind hole for mounting the first threaded nut and a first opening in the axial direction of the blind hole, through which the first threaded nut can preferably be passed. Furthermore, the second climbing shoe has a blind hole for mounting the second threaded nut and a first opening in the axial direction of the blind hole, through which the second threaded nut can preferably be passed.

[0036] The first opening in the axial direction of the blind hole in the first climbing shoe allows the first threaded nut to be positioned by guiding it through this opening. Similarly, the second threaded nut can be positioned through the first opening in the axial direction of the blind hole in the second climbing shoe by guiding it through this opening.

[0037] In a further advantageous embodiment of the lifting device according to the first aspect of the invention, the first climbing shoe has a second opening for receiving an anchoring element, through which the anchoring element, in particular its threaded rod, can be passed. Furthermore, the second climbing shoe has a second opening. Doka GmbH, September 3, 2025 120580P1201 PC for receiving an anchoring element, through which the anchoring element, in particular its threaded rod, can be passed.

[0038] This makes it possible to mount the first climbing shoe on an anchoring element via its second opening and to mount the second climbing shoe on an anchoring element via its second opening.

[0039] Preferably, the first climbing shoe has projections along the second opening, which are configured to interact with the outer end of the anchoring element passing through the second opening in such a way that movement of the first climbing shoe is prevented at least substantially parallel to the threaded rod of the anchoring element and the first climbing shoe is secured to the anchoring element. Disassembly of the first climbing shoe from the anchoring element can therefore only be carried out via the second opening. Preferably, the second climbing shoe has projections along the second opening, which are configured to interact with the outer end of the anchoring element passing through the second opening in such a way that movement of the second climbing shoe is prevented at least substantially parallel to the threaded rod of the anchoring element and the second climbing shoe is secured to the anchoring element.Therefore, the second climbing shoe can only be removed from the anchoring element via the second opening.

[0040] In a further advantageous embodiment of the lifting device according to the first aspect of the invention, the first opening and the second opening of the first climbing shoe are aligned at least substantially in the same direction, and the first opening and the second opening of the second climbing shoe are aligned at least substantially in the same direction.

[0041] This makes it possible, by moving the first climbing shoe in a direction at least substantially perpendicular to the first opening of the first climbing shoe and the side opposite the second opening of the first climbing shoe, to remove the first climbing shoe from the first threaded nut via the first opening of the first climbing shoe and from the anchoring element via the second opening of the first climbing shoe, and by moving the second climbing shoe in a direction at least substantially perpendicular to the first opening of the second climbing shoe and the side opposite the second opening of the second climbing shoe. Doka GmbH, September 3, 2025 120580P1201 PC of the second climbing shoe to remove the second climbing shoe from the second threaded nut via the first opening of the second climbing shoe and from the anchoring element via the second opening of the second climbing shoe.

[0042] In a further advantageous embodiment of the lifting device according to the first aspect of the invention, the first threaded nut has a projection, wherein the first climbing shoe has a locking element, in particular a bolt, which is configured to interact with the projection of the first threaded nut in such a way that the first threaded nut is secured and rotationally fixed in the first climbing shoe. Furthermore, the second threaded nut has a projection, wherein the second climbing shoe has a locking element, in particular a bolt, which is configured to interact with the projection of the second threaded nut in such a way that the second threaded nut is secured and rotationally fixed in the second climbing shoe.

[0043] Preferably, the locking element of the first climbing shoe closes the first opening of the first climbing shoe and the locking element of the second climbing shoe closes the first opening of the second climbing shoe.

[0044] The locking element of the first climbing shoe, in conjunction with the projection of the first threaded nut, allows the first threaded nut to be moved from a secured state, in which it is held firmly and rotationally fixed within the first climbing shoe, to an unsecured state, in which it can be removed from the first climbing shoe. The locking element of the second climbing shoe, in conjunction with the projection of the second threaded nut, allows the second threaded nut to be moved from a secured state, in which it is held firmly and rotationally fixed within the second climbing shoe, to an unsecured state, in which it can be removed from the second climbing shoe.

[0045] Preferably, the first climbing shoe has a second securing element, in particular a bolt, which is configured to secure the first climbing shoe to an anchoring element, and the second climbing shoe has a second securing element, in particular a bolt, which is configured to secure the second climbing shoe to an anchoring element. More preferably, the second securing element of the first climbing shoe closes the second opening of the first Doka GmbH, September 3, 2025 120580P1201 PC Climbing shoe and the second securing element of the second climbing shoe, the second opening of the second climbing shoe.

[0046] The second locking element of the first climbing shoe allows the first climbing shoe to be moved from a secured state, in which it is attached to the anchor point, to an unsecured state, in which it can be removed from the anchor point. The second locking element of the second climbing shoe allows the second climbing shoe to be moved from a secured state, in which it is attached to the anchor point, to an unsecured state, in which it can be removed from the anchor point.

[0047] In a further advantageous embodiment of the lifting device according to the first aspect of the invention, the ratio of the length of the first threaded section to the length of the second threaded section is preferably about 5 to 1, particularly preferably about 10:1; most preferably about 8:1.

[0048] A specific ratio of the length of the first thread section to the length of the second thread section makes it possible to influence the timing of the automatic load redistribution from the first threaded nut stored in the first climbing shoe to the second threaded nut stored in the second climbing shoe, i.e., the timing at which, through rotation of the differential thread spindle, the first threaded nut stored in the first climbing shoe is located in the second thread section of the differential thread spindle.

[0049] Preferably, the ratio of the length of the first threaded section to the length of the second threaded section is chosen depending on the requirements of the respective application of the lifting device.

[0050] In a further advantageous embodiment of the lifting device according to the first aspect of the invention, the ratio of the thread pitch of the first thread section to the thread pitch of the second thread section is preferably about 10.2 to 10, particularly preferably about 10.1 to 10, most preferably about 10.05 to 10.

[0051] A specific ratio of the thread pitch of the first thread section to the thread pitch of the second thread section ensures, on the one hand, the screwability. Doka GmbH, September 3, 2025 120580P1201PC of the first thread section and the second thread section of the differential threaded spindle in the first threaded nut and in the second threaded nut. On the other hand, a specific ratio of the thread pitch of the first threaded section to the thread pitch of the second threaded section can ensure that a load transfer from the first threaded nut, located in the first mounting shoe, to the second threaded nut, located in the second mounting shoe, occurs as soon as, through rotation of the differential threaded spindle, the first threaded nut located in the first mounting shoe is in the second threaded section of the differential threaded spindle.

[0052] Preferably, the ratio of the thread pitch of the first thread section to the thread pitch of the second thread section is chosen depending on the requirements of the respective application of the lifting device.

[0053] In a further advantageous embodiment of the lifting device according to the first aspect of the invention, the lifting device has a lifting force of preferably at least 2 kN, particularly preferably at least 20 kN, most preferably at least 500 kN.

[0054] A minimum lifting force of the lifting device ensures that even heavy self-climbing systems can be lifted safely.

[0055] In a further advantageous embodiment of the lifting device according to the first aspect of the invention, the drive is an electric motor with a control unit, wherein the control unit is configured to control the lifting speed of the lifting device by controlling the rotational speed of the differential threaded spindle.

[0056] Using an electric motor as the drive instead of a hydraulic drive allows the lifting device to be used even in ecologically sensitive areas, as no hydraulic oil is used. Furthermore, using an electric motor instead of a hydraulic drive avoids malfunctions caused by unfavorable environmental conditions, such as increased viscosity of the hydraulic fluid due to low temperatures.

[0057] The control of the lifting speed of the lifting device by controlling the rotational speed of the differential thread spindle by the control unit of the Doka GmbH, September 3, 2025 120580P1201 PC The electric motor makes it possible to adapt the lifting speed of the lifting device to the requirements of the respective application of the lifting device.

[0058] Preferably, the control unit of the electric motor is further configured to control the stroke of the lifting device by controlling the number of revolutions of the differential lead screw. The stroke is determined by the number of revolutions of the differential lead screw and the thread pitches of the thread sections of the differential lead screw.

[0059] Controlling the stroke of the lifting device by regulating the number of revolutions of the differential lead screw via the electric motor's control unit allows for precise adjustment of the lifting device's required vertical position. Since the vertical position of the lifting device is determined by the number of revolutions of the differential lead screw and the thread pitches of the differential lead screw's thread sections, the need for position measuring systems is eliminated.

[0060] In an advantageous embodiment of the climbing shoe according to the second aspect of the invention, the threaded nut has a spherical section on an end face, wherein the climbing shoe has a spherical contact surface which forms a ball joint with the spherical section of the threaded nut.

[0061] The ball joint formed between the spherical contact surface of the climbing shoe and the spherical section of the threaded nut allows for a constraint-free alignment of the threaded nut along a threaded spindle.

[0062] In a further advantageous embodiment of the climbing shoe according to the second aspect of the invention, the climbing shoe has a blind hole for bearing the threaded nut and a first opening in the axial direction of the blind hole, through which the threaded nut can preferably be passed.

[0063] The first opening in the axial direction of the blind hole of the climbing shoe makes it possible to position the threaded nut by guiding the threaded nut through the first opening in the climbing shoe.

[0064] In a further advantageous embodiment of the climbing shoe according to the second aspect of the invention, the climbing shoe has a second opening for receiving a Doka GmbH, September 3, 2025 120580P1201 PC anchoring element through which the anchoring element, in particular its threaded rod, can be passed.

[0065] This makes it possible to mount the climbing shoe to an anchoring element via its second opening.

[0066] Preferably, the climbing shoe has projections along the second opening which are designed to interact with the outer end of the anchoring element passing through the second opening in such a way that movement of the climbing shoe, at least substantially parallel to the threaded rod of the anchoring element, is prevented and the climbing shoe is secured to the anchoring element. Disassembly of the climbing shoe from the anchoring element can therefore only be carried out via the second opening.

[0067] In a further advantageous embodiment of the climbing shoe according to the second aspect of the invention, the first opening and the second opening are aligned at least substantially in the same direction.

[0068] The alignment of the first opening and the second opening at least substantially in the same direction makes it possible to remove the climbing shoe from the threaded nut and from the anchoring element via the first opening of the climbing shoe and the second opening of the climbing shoe by moving the climbing shoe in a direction at least substantially perpendicular to the side of the climbing shoe opposite the first opening of the climbing shoe and the second opening of the climbing shoe.

[0069] In a further advantageous embodiment of the climbing shoe according to the second aspect of the invention, the threaded nut has a projection, wherein the climbing shoe has a securing element, in particular a bolt, which is arranged to cooperate with the projection of the threaded nut in such a way that the threaded nut is secured and rotationally fixed in the climbing shoe.

[0070] Preferably, the safety element closes the first opening of the climbing shoe. Doka GmbH, September 3, 2025 120580P1201 PC

[0071] The locking element, in conjunction with the projection of the threaded nut, makes it possible to move the threaded nut from a secured state, in which the threaded nut is secured and rotated within the climbing shoe, to an unsecured state, in which the threaded nut can be removed from the climbing shoe.

[0072] Preferably, the climbing shoe has a second securing element, in particular a bolt, which is designed to secure the climbing shoe to the anchoring element. More preferably, the second securing element closes the second opening of the climbing shoe.

[0073] The second securing element makes it possible to move the climbing shoe from a secured state, in which the climbing shoe is secured to the anchoring element, to an unsecured state, in which the climbing shoe can be removed from the anchoring element.

[0074] In an advantageous embodiment of the self-climbing system according to the third aspect of the invention, during intended use of the lifting device, the differential threaded spindle is movably connected to the first threaded nut and / or the second threaded nut at all times, wherein the lifting device is mechanically fixed in position, in particular self-locking, at all times when the differential threaded spindle is not rotated by the drive.

[0075] This ensures a continuous climbing movement of the self-climbing system as well as precise and safe positioning of the self-climbing system at a desired height.

[0076] In an advantageous embodiment of the method according to the fourth aspect of the invention, the method, in particular before the first work step, additionally includes the following work step: concreting the structural section C with a third anchoring element.

[0077] This additional step enables the sectional concreting of structural components using a self-climbing formwork system and a lifting device according to the first aspect of the invention. Doka GmbH, September 3, 2025 120580P1201 PC

[0078] In a further advantageous embodiment of the method according to the fourth aspect of the invention, the method additionally comprises the following work steps before the first work step: mounting the first climbing shoe, preferably via its second opening, on the first anchoring element of the structure section A and mounting the second climbing shoe, preferably via its second opening, on the second anchoring element of the structure section B; and mounting the differential thread spindle of the lifting device on the first climbing shoe of the lifting device.

[0079] These assembly steps enable simple, cost-effective and safe installation of the lifting device on a building.

[0080] In a further advantageous embodiment of the method according to the fourth aspect of the invention, the method further comprises the following steps: rotating the differential thread spindle, preferably by means of the drive, until the first thread section of the differential thread spindle is at the level of the second climbing shoe; and mounting the differential thread spindle on the second climbing shoe.

[0081] In a further advantageous embodiment of the method according to the fourth aspect of the invention, the method further comprises the following steps: Rotating the differential threaded spindle, preferably by means of the drive, wherein the first threaded section is screwed into the second threaded nut of the second climbing shoe.

[0082] This allows the self-climbing system to be continuously raised or lowered without interruption.

[0083] In a further advantageous embodiment of the method according to the fourth aspect of the invention, the first climbing shoe is mounted by sliding its second opening over the first anchoring element, the differential threaded spindle is mounted by placing the first threaded nut on the differential threaded spindle and then sliding the first opening of the first climbing shoe over the differential threaded spindle and / or the first threaded nut.

[0084] In a further advantageous embodiment of the method according to the fourth aspect of the invention, the differential thread spindle is mounted on the first climbing shoe by placing the first threaded nut on the differential thread spindle and then the first opening of the first climbing shoe via the differential thread spindle and / or the Doka GmbH, September 3, 2025 120580P1201PC first threaded nut is pushed, and / or wherein the differential threaded spindle is mounted on the second climbing shoe by placing the second threaded nut on the differential threaded spindle and then pushing the second opening of the second climbing shoe over the differential threaded spindle and / or the second threaded nut.

[0085] The two advantageous designs enable the simplest possible, time-saving and cost-effective assembly of the first climbing shoe and the differential thread spindle, and thus of the lifting device, on a building.

[0086] The invention will be explained in more detail below with reference to non-limiting embodiments illustrated in the figures. These figures show, at least partially schematically: Fig. 1 shows a perspective view of an embodiment of a Lifting device for lifting a self-climbing system for erecting structures; Fig. 2 shows a perspective view of an embodiment of a Climbing shoes for lifting devices in the construction sector; Fig. 3a shows a perspective view of an embodiment of a divisible Threaded nut in assembled state; Fig. 3b shows a perspective view of an embodiment of a divisible Threaded nut in split state; Fig. 4 is a block diagram of an embodiment of a method for Lifting of a self-climbing system for erecting structures with a lifting device; Fig. 5 shows a block diagram of an embodiment of a method for concreting structural elements section by section using a self-climbing formwork system with a lifting device; and Doka GmbH, September 3, 2025 120580P1201PC Fig. 6a, 6b, 6c schematic representation of the climbing process of the method shown in Fig. 5 for concreting structural elements section by section using a self-climbing formwork system with a lifting device.

[0087] Fig. 1 schematically shows a preferred embodiment of a lifting device 1 for lifting a self-climbing system 50 for erecting structures in a perspective view.

[0088] The lifting device 1 comprises a differential thread spindle 2 with a first threaded section 21 and a second threaded section 22, a first climbing shoe 3A with a first threaded nut 4A, a second climbing shoe 3B with a second threaded nut 4B and a drive 6.

[0089] The differential thread spindle 2 is vertically oriented, and the first threaded section 21 lies vertically above the second threaded section 22. The length of the first threaded section 21 of the differential thread spindle 2 is preferably greater than the length of the second threaded section 22 of the differential thread spindle 2.

[0090] The first climbing shoe 3A and the second climbing shoe 3B are preferably designed as in the embodiment of a climbing shoe 3 shown in Fig. 2. The first threaded nut 4A and the second threaded nut 4B are preferably designed as in the embodiment of a split threaded nut 4 shown in Figs. 3a and 3b.

[0091] The first threaded nut 4A is mounted in the first climbing shoe 3A in a rotationally fixed position and has an internal thread 5A, which is designed such that the first threaded section 21 and the second threaded section 22 of the differential threaded spindle 2 can each be screwed into the first threaded nut 4A. The second threaded nut 4B is mounted in the second climbing shoe 3B in a rotationally fixed position and has an internal thread 5B, which is designed such that the first threaded section 21 and the second threaded section 22 of the differential threaded spindle 2 can each be screwed into the second threaded nut 4B. Thus, a rotary movement of the differential threaded spindle 2 can be converted into a translational movement of the lifting device 1.

[0092] The first threaded nut 4A is divisible in at least an essentially axial direction into a first threaded nut part 41A and a second threaded nut part 42A in order to be separated by Doka GmbH, September 3, 2025 120580P1201 PC from a composite state, in which the first threaded nut 4A is configured to receive the differential threaded spindle 2, to a split state, in which the first threaded nut 4A can be removed from the differential threaded spindle 2 at any axial position of the differential threaded spindle 2. The first threaded nut part 41A of the first threaded nut 4A has a partial thread 51A of the internal thread 5A of the first threaded nut 4A, and the second threaded nut part 42A of the first threaded nut 4A has a partial thread 52A of the internal thread 5A of the first threaded nut 4A.

[0093] The second threaded nut 4B is divisible in at least a substantially axial direction into a first threaded nut part 41B and a second threaded nut part 42B, in order to be converted from an assembled state, in which the second threaded nut 4B is configured to receive the differential threaded spindle 2, to a divided state, in which the second threaded nut 4B can be removed from the differential threaded spindle 2 at any axial position of the differential threaded spindle 2. The first threaded nut part 41B of the second threaded nut 4B has a partial thread 51B of the internal thread 5B of the second threaded nut 4B, and the second threaded nut part 42B of the second threaded nut 4B has a partial thread 52B of the internal thread 5B of the second threaded nut 4B.

[0094] The first climbing shoe 3A has a blind hole for mounting the first threaded nut 4A and a first opening 9A in the axial direction of the blind hole, through which the first threaded nut 4A can preferably be passed. The second climbing shoe 3B has a blind hole for mounting the second threaded nut 4B and a first opening 9B in the axial direction of the blind hole, through which the second threaded nut 4B can preferably be passed.

[0095] The first climbing shoe 3A has a second opening 10A for receiving a first anchoring element 11A, through which the first anchoring element 11A, in particular its threaded rod, can be passed. The first opening 9A and the second opening 10A of the first climbing shoe 3A are oriented at least substantially in the same direction, so that by moving the first climbing shoe 3A in a direction R at least substantially perpendicular to the first opening 9A and the second opening 10A of the first climbing shoe 3A, the first climbing shoe 3A is moved via the first opening 9A of the first climbing shoe 3A from the first threaded nut 4A and via the Doka GmbH, September 3, 2025 120580P1201 PC The second opening 10A of the first climbing shoe 3A can be removed from the first anchoring element 11A. Subsequently, the first threaded nut 4A can also be removed from the differential threaded spindle 2 by transferring it from the assembled state to the split state.

[0096] The second climbing shoe 3B has a second opening 10B for receiving a second anchoring element 11B, through which the second anchoring element 11B, in particular its threaded rod, can be passed. The first opening 9B and the second opening 10B of the second climbing shoe 3B are aligned at least substantially in the same direction, so that by moving the second climbing shoe 3B in a direction R at least substantially perpendicular to the first opening 9B and the second opening 10B of the second climbing shoe 3B, the second climbing shoe 3B can be removed from the second threaded nut 4B via the first opening 9B of the first climbing shoe 3B and from the second anchoring element 11B via the second opening 10B of the second climbing shoe 3B.Subsequently, the second threaded nut 4B can also be removed from the differential threaded spindle 2 by transferring it from the assembled state to the split state.

[0097] In this embodiment, the drive 6 is designed as an electric motor connected to the free end of the second threaded section 22 of the differential lead screw 2 and configured to drive the lifting device 1 by rotating the differential lead screw 2. Alternatively, the differential lead screw 2 can also be rotated manually. In one embodiment, a crank mechanism is used, which in another embodiment can be equipped with a gearbox.

[0098] Preferably, the electric motor 6 has a control unit configured to control the lifting speed of the lifting device 1 by controlling the rotational speed of the differential lead screw 2. More preferably, the control unit of the electric motor 6 is also configured to control the stroke of the lifting device 1 by controlling the number of revolutions of the differential lead screw 2.

[0099] The lifting device 1 is attached to a structure via a first anchoring element 11A received through the second opening 10A of the first climbing shoe 3A and via a second anchoring element 11B received through the second opening 10B of the second climbing shoe 3B. Doka GmbH, September 3, 2025 120580P1201 PC

[0100] When the lifting device 1 is used as intended, the differential thread spindle 2 is movably connected to the first threaded nut 4A and / or the second threaded nut 4B at all times and is mechanically fixed in position, in particular self-locking, at all times when the differential thread spindle 2 is not rotated by the electric motor 6.

[0101] Fig. 2 schematically shows a preferred embodiment of a climbing shoe 3 for lifting devices in the construction sector in a perspective view.

[0102] The climbing shoe 3 has a blind hole in which a threaded nut 4 is mounted in a twisted position. The threaded nut 4 has an internal thread 5, which is designed such that a threaded spindle 2 can be screwed into the threaded nut 4.

[0103] The threaded nut 4 is preferably designed as in the embodiment of a split threaded nut 4 shown in Figs. 3a and 3b. The threaded nut 4 has a spherical section 7 on one end face, which forms a ball joint with a spherical bearing surface 8 of the climbing shoe 3, enabling the threaded nut to be aligned without constraint along a threaded spindle 2.

[0104] The climbing shoe 3 has a first opening 9 in the axial direction of the blind hole, through which the threaded nut 4 can preferably be passed. Furthermore, the climbing shoe 3 has a second opening 10 for receiving an anchoring element 11, through which the anchoring element 11, in particular its threaded rod, can be passed. Preferably, the climbing shoe 3 has projections 14 along the second opening 10, which are designed to interact with the outer end of the anchoring element 11 passed through the second opening 10 in such a way that movement of the climbing shoe 3 at least substantially parallel to the threaded rod of the anchoring element 11 is prevented and the climbing shoe 3 is attached to the anchoring element 11. Disassembly of the climbing shoe 3 from the anchoring element 11 can therefore only be carried out via the second opening 10.

[0105] The first opening 9 and the second opening 10 are preferably oriented at least substantially in the same direction, so that by moving the climbing shoe 3 in a direction R at least substantially perpendicular to the first Doka GmbH, September 3, 2025 120580P1201 PC The climbing shoe 3 can be removed from the threaded nut 4 and the anchoring element 11 by opening 9 and the second opening 10 on the opposite side of the climbing shoe 3. The threaded nut 4 can then also be removed from the threaded spindle 2 by transferring it from the assembled state to the separated state.

[0106] The threaded nut 4 has a projection 12 and the climbing shoe 3 has a locking element 13, in particular a bolt, which preferably closes the first opening 9 of the climbing shoe 3 and is designed to interact with the projection 12 of the threaded nut 4 in such a way that the threaded nut 4 is secured in the climbing shoe 3 and is mounted in a rotationally fixed manner.

[0107] The climbing shoe 3 further preferably has a second securing element 15 which closes the second opening 10 of the climbing shoe 3 and is designed to secure the climbing shoe 3 to the anchoring element 11.

[0108] In order to remove the climbing shoe 3 from the threaded nut 4 and the anchoring element 11 by a movement in a direction R at least substantially perpendicular to the side of the climbing shoe 3 opposite the first opening 9 and the second opening 10, it is necessary to remove the securing element 13 and the second securing element 15.

[0109] Fig. 3a schematically shows a preferred embodiment of a split threaded nut 4 in its assembled state in a perspective view. Fig. 3b shows the split threaded nut 4 from Fig. 3a in its split state.

[0110] The split threaded nut 4 has an internal thread 5, which is designed such that a threaded spindle 2 (Fig. 1, Fig. 2) can be screwed into it. The split threaded nut 4 is further designed such that it can be removed from the threaded spindle 2 at any axial position by transferring the split threaded nut 4 from the assembled state to the split state.

[0111] The split threaded nut 4 comprises a first threaded nut part 41 and a second threaded nut part 42. Preferably, the first threaded nut part 41 and the second threaded nut part 42 have a fit 16 which defines a position of the first Doka GmbH, September 3, 2025 120580P1201 PC The threaded nut part 41 and the second threaded nut part 42 are defined in the assembled state of the split threaded nut 4.

[0112] The first threaded nut part 41 has a partial thread 51 of the internal thread 5 of the split threaded nut 4 and the second threaded nut part 42 has a partial thread 52 of the internal thread 5 of the split threaded nut 4.

[0113] The split threaded nut 4 also has a spherical section 7 on one end face, which corresponds to the spherical contact surface 8 of the climbing shoe 3 (Fig. 1, Fig. 2). 2) forms a ball joint which enables a constraint-free alignment of the split threaded nut 4 along a threaded spindle 2.

[0114] Furthermore, the split threaded nut 4 has a projection 12 which is designed to interact with the locking element 13 of the climbing shoe 3 (Fig. 1, Fig. 2) in such a way that the split threaded nut 4 is secured in the climbing shoe 3 and mounted in a rotationally fixed manner.

[0115] Fig. 4 shows a block diagram of an embodiment of a method 100 for lifting a self-climbing system 50 for erecting structures with a lifting device 1.

[0116] Before carrying out the actual work steps for raising or lowering the self-climbing system 50, the lifting device 1 must be mounted on the structure. In a first work step M1A for mounting the method 100, the first climbing shoe 3A is mounted, preferably via the second opening 10A of the first climbing shoe 3A, on a first anchoring element 11A of a structure section A, and the second climbing shoe 3B is mounted, preferably via the second opening 10B of the second climbing shoe 3B, on a second anchoring element 11B of a structure section B adjacent to structure section A. The climbing shoes 3A, 3B are preferably slid onto the anchoring elements 11A, 11B.

[0117] Preferably, the second opening 10A of the first climbing shoe 3A is closed by means of the second securing element 15A of the first climbing shoe 3A, so that the first climbing shoe 3A is secured to the first anchoring element 11A. Further preferably, the second opening 10B of the second climbing shoe 3B is closed by means of the second securing element. Doka GmbH, September 3, 2025 120580P1201 PC 15B of the second climbing shoe 3B is closed, so that the second climbing shoe 3B is secured to the second anchoring element 11B.

[0118] In a second work step M2A for the assembly of the method 100, the differential thread spindle 2 of the lifting device 1 is mounted on the first climbing shoe 3A of the lifting device 1.

[0119] Preferably, the lifting device 1 or the self-climbing system 50 is first lifted to a corresponding height, in particular with a crane.

[0120] The first threaded nut 4A is preferably positioned at the level of the first climbing shoe 3A by transitioning from the split to the assembled state in the first threaded section 21 of the differential threaded spindle 2. The lifting device 1 is then positioned and stored within the first climbing shoe 3A by guiding the first threaded nut 4A through the first opening 9A of the first climbing shoe 3A, which is mounted on the structure section A via the first anchoring element 11A. The lifting device 1 is thus attached to the structure. Preferably, the first threaded nut 4A is secured within the first climbing shoe 3A by the locking element 13A of the first climbing shoe 3A. The first threaded nut 4A is further stored in the first climbing shoe 3A, preferably in a twisted position.

[0121] The assembly steps M1A and M2A can be carried out sequentially or simultaneously, as described. In the latter case, the first opening 9A of the first climbing shoe 3A is slid over the differential threaded spindle 2 and the first threaded nut 4A, and the second opening 10A of the first climbing shoe 3A is slid over the first anchoring element 11A of the structure section A. Preferably, the first threaded nut is secured in the first climbing shoe 3A by means of the locking element 13A of the first climbing shoe 3A, and further preferably, the second opening 10A of the first climbing shoe 3A is closed by means of the second locking element 15A of the first climbing shoe 3A, so that the first climbing shoe 3A is secured to the first anchoring element 11A.

[0122] In a further first step M1 B for assembly, the second climbing shoe 3B is mounted, preferably via its second opening 10B, on the second anchoring element 11 B of the structure section B. More preferably, the second opening 10B of the second climbing shoe 3B is secured by means of the second securing element 15B of the second Doka GmbH, September 3, 2025 120580P1201PC The climbing shoe 3B is closed, so that the second climbing shoe 3B is secured to the second anchoring element 11B.

[0123] In the second climbing shoe 3B, the second threaded nut 4B is preferably mounted in a rotationally fixed position. Preferably, the locking element 13B of the second climbing shoe 3B closes the first opening 9B of the second climbing shoe 3B, so that the second threaded nut 4B is secured and rotationally fixed in the second climbing shoe 3B. Preferably, the second threaded nut 4B is aligned via the ball joint formed by the spherical section 7 located on an end face of the second threaded nut 4B and the spherical bearing surface 8 of the second climbing shoe 3B such that the differential threaded spindle 2 can be screwed into the second threaded nut 4B without constraint.

[0124] In a first alternative of a first work step 101-1 for the lifting process 100, the lifting device 1 is raised by rotating the differential thread spindle 2 by the drive 6, whereby the first threaded section 21 of the differential thread spindle 2 is screwed into the first threaded nut 4A of the first climbing shoe 3A, which is mounted on the first anchoring element 11A of the structure section A. The differential thread spindle 2 is rotated until the first threaded section 21 reaches the level of the second climbing shoe 3B.

[0125] In a further second work step, M2B is then used to assemble the method 100 by mounting the differential thread spindle 2 of the lifting device 1 on the second climbing shoe 3A of the lifting device 1.

[0126] For this purpose, the second threaded nut 4B is preferably positioned at the level of the second climbing shoe 3B by transferring it from the split to the assembled state in the first threaded section 21 of the differential threaded spindle 2.

[0127] The lifting device 1 is then positioned and stored in the second climbing shoe 3B by guiding the second threaded nut 4B through the first opening 9B of the second climbing shoe 3B, which is mounted on the structure section B via the second anchoring element 11B. Preferably, the second threaded nut 4B is secured in the second climbing shoe 3B via the securing element 13B of the second climbing shoe 3B.

[0128] In a second alternative of the first work step 101-2 for the stroke of the method 100, the lifting device 1 is rotated by the differential thread spindle 2 through the Doka GmbH, September 3, 2025 120580P1201 PC Drive 6 is raised, whereby the first threaded section 21 of the differential thread spindle 2 is screwed into the first threaded nut 4A of the first climbing shoe 3A, which is mounted on the first anchoring element 11A of structure section A. When the differential thread spindle 2 reaches the height of the second climbing shoe 3B, the first threaded section 21 is screwed into the second threaded nut 4B of the second climbing shoe 3B.

[0129] In a second work step 102 of the lifting process 100, the lifting device 1 is raised by rotation of the differential thread spindle 2 by the drive 6, wherein the first threaded section 21 of the differential thread spindle 2 is screwed into the second threaded nut 4B of the second climbing shoe 3B, which is mounted on the second anchoring element 11 B of the structure section B, and wherein the second threaded section 22 of the differential thread spindle 2 is screwed into the first threaded nut 4A of the first climbing shoe 3A, which is mounted on the first anchoring element 11 A of the structure section A, from a certain height of the differential thread spindle 2.

[0130] Due to the different thread pitches of the first thread section 21 and the second thread section 22 of the differential thread spindle 2, in particular due to a larger thread pitch of the first thread section 21 compared to the second thread section 22, a further rotation of the differential thread spindle 2 now results in a load redistribution from the first threaded nut 4A mounted in the first climbing shoe 3A to the second threaded nut 4B mounted in the second climbing shoe 3B.

[0131] In a third step 103 of the method 100, as soon as a load redistribution from the first climbing shoe 3A to the second climbing shoe 3B has taken place, preferably as soon as the first threaded nut 4A of the first climbing shoe 3A is relieved by the differential threaded spindle 2, the first climbing shoe 3A with the first threaded nut 4A is removed from the differential threaded spindle 2 and the first anchoring element 11A of the structure section A.

[0132] To dismantle the first climbing shoe 3A with the first threaded nut 4A from the differential threaded spindle 2 and the first anchoring element 11 A of the structure section A, preferably the securing element 13A of the first climbing shoe 3A and the second securing element 15A of the first climbing shoe 3A are removed. Doka GmbH, September 3, 2025 120580P1201 PC Subsequently, the first climbing shoe 3A is removed, preferably by moving the first climbing shoe 3A in a direction R at least substantially parallel to the course of the first opening 9A and the course of the second opening 10A of the first climbing shoe 3A, from the first threaded nut 4A via the first opening 9A of the first climbing shoe 3A and from the first anchoring element 11A of the structure section A via the second opening 10A of the first climbing shoe 3A. Then, preferably, the first threaded nut 4A is also removed from the differential threaded spindle 2 by transitioning from the assembled state to the separated state.

[0133] In a fourth step 104 of the process 100, a climbing shoe 3A, in particular the first, is mounted with a threaded nut 4A, in particular the first, on a third anchoring element 11 C of a building section C which is also adjacent to building section B.

[0134] Preferably, the first climbing shoe 3A is first mounted on the third anchoring element 11C by moving it in a direction at least substantially perpendicular to the first opening 9A and the second opening 10A of the first climbing shoe 3A, i.e., in a direction at least substantially opposite to the direction R, via the second opening 10A of the first climbing shoe 3A. Preferably, the second opening 10A of the first climbing shoe 3A is closed via the second securing element 15A of the first climbing shoe 3A, so that the first climbing shoe 3A is secured to the third anchoring element 11C.

[0135] Preferably, the first threaded nut 4A is then transferred from the split state to the assembled state and guided through the first opening 9A of the first climbing shoe 3A into the first climbing shoe 3A and stored there. Preferably, the first threaded nut 4A is aligned via the ball joint formed by the spherical section 7 located on an end face of the first threaded nut 4A and the spherical bearing surface 8 of the first climbing shoe 3A such that the differential threaded spindle 2 can be screwed into and / or screwed into the first threaded nut 4A without constraint.

[0136] Subsequently, work steps 101-1 or 101-2 to 104 can be repeated as often as desired to allow the self-climbing system 50 to be lifted to any desired height. Doka GmbH, September 3, 2025 120580P1201 PC

[0137] Although the method 100 was described above in relation to lifting a self-climbing formwork system 50, it is obvious to the person skilled in the art that it can also be used to lower such a system if the differential thread spindle 2 is rotated in the other direction of rotation by the drive 6.

[0138] Due to the smaller thread pitch of the lower second thread section 22, it moves more slowly in the axial direction of the differential thread spindle 2 when screwed into the threaded nut 4A, 4B of a lower climbing shoe 3A, 3B than the first thread section 21, which is screwed into the threaded nut 4B, 4A of an upper climbing shoe 3B, 3A. Consequently, a load redistribution occurs from the upper climbing shoe 3B, 3A to the lower climbing shoe 3A, 3B. The climbing shoes 3A, 3B are then moved downwards instead of upwards.

[0139] Fig. 5 shows a block diagram of an embodiment of a method 100 for raising or lowering a self-climbing system 50 with a lifting device 1, in particular for concreting structural elements section by section using a self-climbing formwork system 50 with a lifting device 1.

[0140] In this embodiment, the self-climbing system 50 is a self-climbing formwork system 50 for concreting structural elements. The assembly steps M1A, M1B, M2A, and M2B and the lifting steps 101-1 or 101-2 to 104 of the embodiment shown in Fig. 5 are preferably carried out analogously to the assembly steps M1A, M1B, M2A, and M2B and the lifting steps 101-1 or 101-2 to 104 of the embodiment shown in Fig. 4.

[0141] Before the work steps for lifting 101-1 or 101-2 to 104, the embodiment shown in Fig. 5 includes an additional work step for concreting BET. In this additional work step BET, the next higher section of the structure C is concreted with a third anchoring element 11C. The first climbing shoe 3A can then be moved onto the third anchoring element 11C of the newly concreted section C in the fourth work step 104. Thus, the self-climbing formwork system 50 climbs higher and higher as the structure grows taller. Doka GmbH, September 3, 2025 120580P1201PC

[0142] In this embodiment of method 100, the work steps BET and 101-1 or 101-2 to 104 can also be repeated as often as desired to enable the concreting of the structure up to a defined height.

[0143] Figs. 6a, 6b and 6c schematically show the climbing process of the method 100 shown in Fig. 5 for concreting structural elements section by section using a self-climbing formwork system 50 with a lifting device 1.

[0144] Fig. 6a shows a self-climbing formwork system 50 with a lifting device 1. The self-climbing formwork system 50 is mounted on an already concreted section A of the structure via a first climbing shoe 3A and a first anchoring element 11A. The differential threaded spindle 2 is screwed only into the first threaded nut 4A of the first climbing shoe 3A and mechanically fixed in position there, in particular by means of self-locking.

[0145] The structure section B, located above structure section A and also already concreted, has a second anchoring element 11B to which a second climbing shoe 3B with a second threaded nut 4B is mounted. The second threaded nut 4B is unloaded; the entire load of the self-climbing formwork system 50 with the lifting device 1 rests on the first threaded nut 4A.

[0146] Fig. 6a shows the point in time of process 100 shortly after the concreting of structure section C located above structure section B with a third anchoring element 110, i.e. shortly after work step BET of process 100. In the figure, structure section C is still in formwork.

[0147] Fig. 6b shows the self-climbing formwork system 50 with a lifting device 1 from Fig. 6a after completion of work step 101 of the method 100. The structure section C has been stripped of its formwork. The self-climbing formwork system 50 was raised via the lifting device 1 by rotation of the differential thread spindle 2 by the drive 6, compared to the state shown in Fig. 6a.

[0148] The first threaded section 21 of the differential threaded spindle 2 is screwed into the second threaded nut 4B of the second climbing shoe 3B, which is mounted on the second anchoring element 11B of the structure section B. The second threaded section 22 of the differential threaded spindle 2, which lies vertically below the first threaded section 21 of the differential threaded spindle 2, is screwed into the Doka GmbH, September 3, 2025 120580P1201 PC first threaded nut 4A of the first climbing shoe 3A, which is mounted on the first anchoring element 11A of the structure section A, screwed in.

[0149] Due to the different thread pitches of the first thread section 21 and the second thread section 22 of the differential thread spindle 2, in particular due to a larger thread pitch of the first thread section 21 compared to the second thread section 22, the first threaded nut 4A mounted in the first climbing shoe 3A is now relieved and the second threaded nut 4B mounted in the second climbing shoe 3B is loaded.

[0150] Fig. 6c shows the self-climbing formwork system 50 with a lifting device 1 from Figs. 6a and 6b after completion of work step 103 of the method 100. After relieving the first threaded nut 4A mounted in the first climbing shoe 3A, the first climbing shoe 3A with the first threaded nut 4A was removed from the first anchoring element 11 A of the structure section A and the differential threaded spindle 2 and mounted unloaded on the third anchoring element 11 C of the structure section C.

[0151] The self-climbing formwork system 50 was raised via the lifting device 1 by rotation of the differential thread spindle 2 by the drive 6, compared to the state shown in Fig. 6b. The next higher section of the structure, D, adjacent to section C and to be concreted next, is now formed and ready for concreting.

[0152] It should be noted that the embodiments described are merely examples and are not intended to restrict the scope of protection, application, or structure in any way. Rather, the preceding description provides the person skilled in the art with a guideline for implementing at least one embodiment, whereby various modifications, particularly with regard to the function and arrangement of the described components, can be made without departing from the scope of protection as defined in the claims and these equivalent combinations of features. Doka GmbH, September 3, 2025 120580P1201 PC Reference symbol list: 1 lifting device 2 Differential thread spindle 21 first thread section 22 second thread section 3 climbing shoes 3A first climbing shoe 3B second climbing shoe 4 threaded nuts 4A first threaded nut 4B second threaded nut 41, 41A, 41B first threaded nut part 42, 42A, 42B second threaded nut part 5, 5A, 5B Internal thread of the threaded nut 51, 51A, 51B Partial thread of the first threaded nut part 52, 52A, 52B Partial thread of the second threaded nut part 50 self-climbing system, self-climbing formwork element 6 Drive 7 spherical section 8 spherical contact surfaces 9, 9A, 9B first opening 10, 10A, 10B second opening 11, 11A, 11B, 11C Anchoring element 12 Projection of the threaded nut 13, 13A, 13B fuse element 14 projections of the second opening 15, 15A, 15B second fuse element 16 Fit

Claims

Doka GmbH, September 3, 2025 120580P1201PC Patent claims 1. Lifting device (1) for lifting self-climbing systems (50) for erecting structures comprising: a differential threaded spindle (2), wherein the differential threaded spindle (2) has a first threaded section (21) with a first thread pitch and a second threaded section (22) with a second thread pitch, wherein the first thread pitch and the second thread pitch are different;a first climbing shoe (3A) with a first threaded nut (4A) and a second climbing shoe (3B) with a second threaded nut (4B), wherein the first threaded nut (4A) in the first climbing shoe (3A) and the second threaded nut (4B) in the second climbing shoe (3B) are each mounted in a rotationally displaced manner and each have an internal thread (5A, 5B), wherein the internal thread (5A) of the first threaded nut (4A) is configured such that the first threaded section (21) and the second threaded section (22) are each screwable into the first threaded nut (4A), and the internal thread (5B) of the second threaded nut (4B) is configured such that the first threaded section (21) and the second threaded section (22) are each screwable into the second threaded nut (4B) in order to convert a rotary movement of the differential threaded spindle (2) into a translational movement of the lifting device (1).

2. Lifting device (1) according to claim 1, further comprising: a drive (6), wherein the drive (6) is connectable to one of the two ends of the differential thread spindle (2) and is configured to drive the lifting device (1) by rotating the differential thread spindle (2).

3. Lifting device (1) according to claim 1 or 2, wherein the first thread pitch is greater than the second thread pitch.

4. Lifting device (1) according to one of the preceding claims, wherein the drive (6) is an electric motor with a control unit, wherein the control unit is configured to control the lifting speed of the lifting device (1) by controlling the rotational speed of the differential threaded spindle (2).

5. Climbing shoe (3) for a lifting device in the construction sector, in particular for a lifting device (1) according to one of claims 1 to 4, wherein the climbing shoe (3) - 34 - Doka GmbH, September 3, 2025 120580P1201 PC has a threaded nut (4) with an internal thread (5), wherein the threaded nut (4) is divisible in at least substantially an axial direction into a first threaded nut part (41) and a second threaded nut part (42) in order to be converted from a composite state to a divided state, wherein the first threaded nut part (41) has a partial thread (51) of the internal thread (5), and wherein the second threaded nut part (42) has a partial thread (52) of the internal thread (5).

6. Climbing shoe (3) according to claim 5, wherein the threaded nut (4) has a spherical section (7) on an end face, and wherein the climbing shoe (3) has a spherical contact surface (8) which forms a ball joint with the spherical section (7) of the threaded nut (4).

7. Climbing shoe (3) according to claim 5 or 6, wherein the climbing shoe (3) has a blind hole for supporting the threaded nut (4) and a first opening (9) in the axial direction of the blind hole through which the threaded nut (4) can preferably be passed.

8. Climbing shoe (3) according to one of claims 5 to 7, wherein the climbing shoe (3) has a second opening (10) for receiving an anchoring element (11).

9. Climbing shoe (3) according to claim 8, wherein the first opening (9) and the second opening (10) are oriented at least substantially in the same direction.

10. Climbing shoe (3) according to one of claims 5 to 9, wherein the threaded nut (4) has a projection (12), and wherein the climbing shoe (3) has a locking element (13), in particular a bolt, which is arranged to interact with the projection (12) of the threaded nut (4) in such a way that the threaded nut (4) is secured and rotationally fixed in the climbing shoe (3).

11. Self-climbing system (50) for erecting structures, comprising a lifting device (1) according to claim 2, in particular in conjunction with one of claims 3 or 4, wherein the drive (6) is preferably connectable to one end of the second threaded section (22) of the differential thread spindle (2), and wherein, during intended use of the lifting device (1), the first - 35 - Doka GmbH, September 3, 2025 120580P1201 PC The threaded section (21) lies vertically above the second threaded section (22).

12. Self-climbing system (50) for erecting structures according to claim 11, wherein, during intended use of the lifting device (1), the differential threaded spindle (2) is movably connected to the first threaded nut (4A) and / or the second threaded nut (4B) at all times, and wherein the lifting device (1) is mechanically fixed in position, in particular self-locking, at all times when the differential threaded spindle (2) is not rotated by the drive (6).

13. Method (100) for raising or lowering a self-climbing system (50) on a structure (A, B, C) by means of a lifting device (1) according to one of claims 1 to 4, in particular with a first climbing shoe (3A) and a second climbing shoe (3B) according to one of claims 5 to 10, comprising the following steps: • Rotating (102) the differential thread spindle (2), preferably by means of the drive (6), wherein the first threaded section (21) of the differential thread spindle (2) is screwed into the second threaded nut (4B) of the second climbing shoe (3B), which is mounted on a second anchoring element (11 B) of a structure section B, and wherein the second threaded section (22) of the differential thread spindle (2) is screwed into the first threaded nut (4A) of the first climbing shoe (3A), which is mounted on a first anchoring element (11 A) of a structure section A adjacent to the structure section B; • Disassemble (103) as soon as a load transfer from the first climbing shoe (3A) to the second climbing shoe (3B) has taken place, preferably as soon as the first threaded nut (4A) of the first climbing shoe (3A) is relieved by the differential threaded spindle (2), of the first climbing shoe (3A) with the first threaded nut (4A) from the differential threaded spindle (2) and the first anchoring element (11A) of the structure section A; and • Mounting (104) a climbing shoe (3A), in particular the first, with a threaded nut (4A), in particular the first, on a third anchoring element (11C) of a building section C also adjacent to building section B, wherein the first building section A and the third building section C are each axially aligned Doka GmbH, September 3, 2025 120580P1201PC Differential thread spindle (2) adjoins the second structure section B.

14. Method (100) according to claim 13, in particular for concreting structural elements section by section using a self-climbing formwork element (50), in particular before the work step (101), additionally comprising the following work step: • Concreting (BET) of structure section C with the third anchoring element (11C).

15. Method (100) according to claim 13 or 14, additionally comprising the following work steps: • Mounting (M1A) the first climbing shoe (3A), preferably via its second opening (10A), on the first anchoring element (11A) of structure section A and mounting (M1B) the second climbing shoe (3B), preferably via its second opening (10B), on the second anchoring element (11B) of structure section B; and • Mounting (M2A) the differential threaded spindle (2) on the first climbing shoe (3A).

16. Method (100) according to one of claims 13 to 15, further comprising the following work steps: • Rotating (101-1) the differential threaded spindle (2), preferably by means of the drive (6), until the first threaded section (21) of the differential threaded spindle (2) is at the level of the second climbing shoe (3B); and • Mounting (M2B) the differential threaded spindle (2) on the second climbing shoe (3B).

17. Method (100) according to one of claims 13 to 15, wherein the second climbing shoe (3B) is mounted with the second threaded nut (4B), additionally comprising the following work steps: • Rotating (101-2) the differential threaded spindle (2), preferably by means of the drive (6), wherein the first threaded section (21) is screwed into the second threaded nut (4B) of the second climbing shoe (3B). Doka GmbH, September 3, 2025 120580P1201 PC 18. Method (100) according to any one of claims 15 to 17, wherein the first climbing shoe (3A) is mounted by sliding its second opening (10A) over the first anchoring element (11A) and / or wherein the second climbing shoe (3B) is mounted by sliding its second opening (10B) over the second anchoring element (11B).

19. Method (100) according to any one of claims 15 to 18, wherein the differential threaded spindle (2) is mounted on the first climbing shoe (3A) by placing the first threaded nut (4A) on the differential threaded spindle (2) and then the first opening (9A) of the first climbing shoe (3A) via the differential threaded spindle (2) and / or the first threaded nut (4A) is pushed, and / or wherein the differential threaded spindle (2) is mounted on the second climbing shoe (3B) by placing the second threaded nut (4B) on the differential threaded spindle (2) and then pushing the second opening (9B) of the second climbing shoe (3B) over the differential threaded spindle (2) and / or the second threaded nut (4B). - 38 -

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