Device and method for driving a fastening element into a base and an energy transmission element

Abstract

The invention relates to a device 20 for driving a fastening element into a substrate, comprising a housing 21, an energy storage device 22 for storing energy, an energy transfer element 30 for transferring energy from the energy storage device 22 to the fastening element, wherein the energy transfer element 30 is configured to move in the housing 21 from a first position 26 to at least a second position, and an energy transfer device 34 for transferring energy from the energy storage device 22 to the energy transfer element 30, wherein the energy transfer device 34 has at least one first energy transfer unit 35.The energy transfer element 30 has a coupling section 31 which interacts with the first energy transfer unit 35 in a positionally fixed manner, at least in the first position 26 of the energy transfer element 30. The first energy transfer unit 35 is movable along a drive direction 25 from the first position 26 to the second position in the housing 21 together with the energy transfer element 30. The first energy transfer unit 35 extends at least partially along the energy transfer element 30 and is configured to detach from the coupling section 31 of the energy transfer element 30 in the second position.

Description

[0001] The present invention relates to a device for driving in a fastening element according to claim 1 and a method for driving in a fastening element into a substrate according to claim 10 as well as an energy transmission element according to claim 15. Technological background

[0002] Various drive concepts exist for driving nails and fasteners into substrates such as wood, steel, and concrete. For applications requiring high driving energy, propellant cartridges are used to provide the necessary energy. One cartridge is required for each fastener. For medium driving energy requirements, gas-powered devices and pneumatic devices with a stationary compressor are used. Battery-operated devices are available for low driving energy requirements.

[0003] Driving nails requires high power. Batteries have a high energy density but can only provide very limited power. Therefore, all battery-operated devices require an energy storage device. This energy storage device allows the energy to be released very quickly, enabling the high power output required.

[0004] The general trend is to extend battery-powered devices to areas requiring higher energy inputs. This will allow them to replace combustion-based devices. Battery-powered devices are easier to use, cheaper, and have a significantly better CO2 footprint than combustion-based devices.

[0005] In driving tools, it is known that mechanical energy is temporarily stored in a mechanical energy storage device and then suddenly transferred to a fastener using a setting piston. If a fastener that is too long is used to fasten the workpiece, or if a long fastener is placed directly onto a hard surface, the setting piston is significantly decelerated, and the remaining energy in the storage device causes a massive recoil of the driving tool. The greater the tool's energy and the longer the fastener, the greater the recoil.

[0006] WO 2015 / 082262 A1 is known from the prior art. This document discloses a device for driving a fastening element into a substrate, comprising a mechanical energy storage device for storing mechanical energy; an energy transfer element for transferring energy from the mechanical energy storage device to the fastening element; an energy transfer device for transferring energy from an energy source to the mechanical energy storage device; and a housing with a first and a second housing part. The first housing part is connected to the second housing part to form an interior space between the first and second housing parts in which the mechanical energy storage device is located. Description of the invention

[0007] One object of the invention is to avoid at least one of the disadvantages of the prior art. In particular, an improved device for driving a fastener into a substrate is to be created, in which the recoil of the device during a driving-in process of a fastener is to be minimized. An improved method for driving in a fastener and an improved energy transmission element are to be provided.

[0008] This problem is solved by the features of the independent patent claims. Advantageous developments are set out in the figures and in the dependent patent claims.

[0009] An inventive device for driving a fastening element into a substrate comprises a housing, an energy storage device for storing energy, an energy transfer element for transferring energy from the energy storage device to the fastening element, wherein the energy transfer element is configured to move within the housing from a first position to at least a second position, and an energy transfer device for transferring energy from the energy storage device to the energy transfer element, wherein the energy transfer device has at least one first energy transfer unit. The energy transfer element has a coupling section that interacts with the first energy transfer unit in a positionally fixed manner, at least in the first position of the energy transfer element.The first energy transfer unit is movable along an insertion direction from the first position to the second position in the housing, together with the energy transfer element. The first energy transfer unit extends at least partially along the energy transfer element and is designed to detach from the coupling section of the energy transfer element in the second position.

[0010] The decoupling of the first energy transfer unit from the coupling section of the energy transfer element in the second position, or in the region of the second position, minimizes the recoil of the device towards the user during the driving process of a fastener. This is because the recoil path to the housing is interrupted, and only a small portion of the driving energy can be transferred back to the device or absorbed within it, as the driving force acts solely on the energy transfer element. The force transmission from the driving energy transfer element to the first energy transfer unit and then to the housing is interrupted by the decoupling section. Typically, the energy transfer element moves in a channel within the housing in both the driving and driving directions.With this device, long fasteners can be driven into the substrate with energies exceeding 90 joules, and up to 600 joules, without causing any unpleasant recoil for the user during the driving process. This is particularly advantageous for battery-powered devices.

[0011] During the driving-in process, the first energy transfer unit moves through several positions within the housing in an initial phase, from at least one initial position to the area of ​​the second position, accompanied by the energy transfer element. Partial driving of the fastening element into the substrate can occur even in this first phase. For example, the energy transfer element is a setting piston with a coupling section for at least temporary coupling of the setting piston to the first energy transfer unit. In this first phase, there is no relative movement between the first energy transfer unit and the energy transfer element, allowing them to remain fixed in position relative to each other and move together in the driving direction. This minimizes wear on the first energy transfer unit.

[0012] The first energy transfer unit extends at least partially along the energy transfer element, so that the energy from the energy storage can be transferred in an improved manner and the energy transfer element can be moved by the first energy transfer unit in the direction of insertion, advantageously in a positionally secure manner.

[0013] Preferably, the energy transfer element is decoupled from the first energy transfer unit in the housing and movable along the insertion direction towards a third position in order to transfer the energy to the fastening element. Decoupling the energy transfer element further minimizes recoil, since in this second phase there is no or only a very elastic mechanical connection between the energy transfer element and the first energy transfer unit. The second phase also includes several positions of the energy transfer element along the insertion direction in the housing. After decoupling, the energy transfer element can move freely towards the fastening element in the housing.

[0014] Preferably, a braking device for decelerating the energy transfer element is provided in the region of the third position within the housing. This allows the energy transfer element, which is in the second phase and in free flight, to be easily decelerated, provided the energy has not been absorbed by the driving process. For example, the braking device includes a damping element made of plastic or rubber to efficiently decelerate the energy transfer element and, if necessary, accelerate it in the opposite direction to the driving direction towards the first energy transfer unit. For example, the energy transfer element includes a braking section that interacts with the braking device during deceleration.

[0015] Preferably, the at least one first energy transfer unit is at least one tension element. This at least one tension element is configured to pull directly or indirectly on the energy transfer element, at least in phases, in order to transfer the energy for driving the fastening element onto the energy transfer element. For example, the tension element can be a strap, a rope, a chain, or the like. A strap or a rope, for example, can be positioned easily and reproducibly at the coupling section of the energy transfer element. A chain is a largely inelastic tension element, so that the energy can be transferred efficiently.

[0016] Preferably, a further energy transfer unit is provided, which is connected to the first energy transfer unit and can be detached from the energy transfer element together with the first energy transfer unit in the second position. This further energy transfer unit improves the interaction with the energy transfer element, enabling it to be moved more easily from at least one first position to at least one further position during the driving-in process. For example, the further energy transfer unit is a traction element, such as a belt, rope, or chain, or comprises a coupling element. The coupling element can be arranged at the coupling section of the energy transfer element and move with it from the first position to the area of ​​the second position during the first phase. The coupling element improves the position-fixed interaction of the first energy transfer unit with the energy transfer element.In particular, the first energy transmission unit is arranged next to the further energy transmission unit.

[0017] Preferably, the first energy transfer unit is arranged at least partially within the energy transfer element, wherein the energy transfer element has a decoupling section and the first energy transfer unit can be moved at least from the coupling section to the decoupling section. The first energy transfer unit can be arranged partially within the energy transfer element and move between the coupling section and the decoupling section when the energy transfer element is in the second phase of the insertion process, or when the energy transfer element has detached from the coupling section in the region of the second position. Depending on the distance between the coupling section and the decoupling section, the energy transfer element travels a shorter or longer distance in free flight. When the first energy transfer unit is located at the decoupling section, the energy transfer element can be decelerated.Such a design of the energy transfer element allows for a simple return of the energy transfer element to the first position using the first energy transfer unit.

[0018] Preferably, the first energy transfer unit has at least one opening into which at least the coupling section of the energy transfer element can be inserted, at least partially. This allows the energy transfer element to be easily held in the first energy transfer unit. For example, the opening is located in the tension element, which is designed as a band. The energy transfer element can have a mandrel for positioning the first energy transfer unit, which can be inserted into the opening to securely hold the energy transfer element in position.

[0019] Preferably, the energy storage device is a mechanical energy storage device for storing mechanical energy. For example, the energy storage device is a spring. The spring enables the linear acceleration of the first energy transfer unit with the energy transfer element. The energy transfer device, which can be used as a transmission gear, is arranged between the spring and the energy transfer element. The first energy transfer unit can be tensioned and released by means of pulleys and the spring. At least the first energy transfer unit can be moved in the insertion direction by means of a spindle drive to tension the spring. When the insertion process is initiated, the spring is released and the energy transfer element is moved in the insertion direction. During the acceleration of the energy transfer element, the force of the spring acts on the energy transfer element via the transmission gear.The energy transfer element is then decoupled from the first energy transfer unit. Due to its inertia, the energy transfer element continues to travel. In an advantageous embodiment, the spring is tensioned by at least 20% and at most 80% of the possible travel of the energy transfer element, divided by the gear ratio of the transmission. The decoupling becomes effective between 30% and 90% of the travel of the energy transfer element.

[0020] Preferably, a return mechanism is provided with which at least the energy transfer element can be returned to its initial position in one direction opposite to the direction of insertion. Once the energy transfer element has been returned to its initial position after the insertion of a first fastening element, another fastening element can be loaded and driven in together with the energy transfer element. This allows multiple fastening elements to be driven in successively.

[0021] Preferably, the feedback device comprises at least one feedback element that can be coupled to the energy transfer element. The feedback device can utilize the spindle drive to return the energy transfer element to its initial position using the spindle drive and the feedback element.

[0022] An inventive method for driving a fastening element into a substrate using a device for driving a fastening element into a substrate comprises at least the following steps: a) Holding an energy transfer element in a first position with at least one first energy transfer unit, wherein the first energy transfer unit extends at least section by section along the energy transfer element; b) Moving the energy transfer element with the at least one first energy transfer unit along a driving direction towards a fastening element, wherein the first energy transfer unit moves with the energy transfer element to a second position and is thereby fixedly pressed against a coupling section of the energy transfer element; c) Detaching the first energy transfer unit from the coupling section of the energy transfer element at the second position;

[0023] Detaching the first energy transfer unit from the coupling section of the energy transfer element in the area of ​​the second position minimizes the recoil of the device onto the user during the driving process of a fastener, as only a small fraction of the driving energy is transferred to or absorbed by the device. Typically, the energy transfer element moves in a channel within the housing in both the driving and counter-directions. With this device, long fasteners with energies exceeding 90 joules, and up to 600 joules, can be driven into the substrate without any unpleasant recoil affecting the user during the driving process.

[0024] Preferably, the energy transfer element is returned in the opposite direction to the insertion direction of the fastening element, and in particular, the energy transfer element is returned decoupled from the first energy transfer unit. Once the energy transfer element has been returned to its initial position after the insertion of a first fastening element, another fastening element can be loaded and driven in along with the energy transfer element. This allows multiple fastening elements to be driven in succession. A decoupled energy transfer element can be easily returned and coupled to the first energy transfer unit.

[0025] Preferably, at least the energy transfer element is returned to its original position by means of a return mechanism. This return mechanism can include a spindle drive and return elements that engage with the energy transfer element to return it to its initial position using the spindle drive. Once the energy transfer element is back in its initial position, the return elements are moved back to their starting position by means of the spindle drive and positioned in such a way that contact with the energy transfer element is prevented. This eliminates the possibility of an unintended collision.

[0026] Preferably, the first energy transfer unit, together with the energy transfer element, is returned to the first position by means of the return device. If both the first energy transfer unit and the energy transfer element are returned, the mechanics in the device can be simplified, and the device can be built small and compact.

[0027] Preferably, the energy transfer element is introduced at least partially into the first energy transfer unit. This ensures improved direct coupling between the first energy transfer unit and the energy transfer element.

[0028] An energy transfer element according to the invention for a device described herein has at least one coupling section for coupling a first energy transfer unit. Coupling and decoupling the energy transfer element from the first energy transfer unit reduces the recoil in the device.

[0029] Further advantages, features and details of the invention will become apparent from the following description, in which exemplary embodiments of the invention are described with reference to the drawings.

[0030] The list of reference numerals, like the technical content of the patent claims and figures, forms part of the disclosure. The figures are described coherently and comprehensively. Identical reference numerals denote identical components; reference numerals with different indices indicate functionally identical or similar components.

[0031] The invention is explained in more detail with reference to exemplary embodiments in the following figures. The list of reference numerals forms part of the disclosure.

[0032] Positional references, such as "top", "bottom", "right" or "left", refer to the corresponding representations and are not to be understood as restrictive.

[0033] Although the invention is illustrated and described in detail by means of the figures and the accompanying description, this illustration and detailed description are to be understood as illustrative and exemplary and not as limiting the invention. It is understood that those skilled in the art may make modifications and adaptations without departing from the scope of the following claims. In particular, the invention also includes embodiments with any combination of features mentioned or shown above with regard to various aspects and / or embodiments.

[0034] The invention also includes individual features shown in the figures, even if they are shown there in conjunction with other features and / or are not mentioned above. Furthermore, the term "comprises" and derivatives thereof does not exclude other elements or steps. Likewise, the indefinite article "a" or "an" and derivatives thereof does not exclude a plurality. The functions of several features listed in the claims can be fulfilled by a single unit. The terms "essentially," "approximately," "about," and the like, in conjunction with a property or value, also define precisely that property or value. All reference numerals in the claims are not to be understood as limiting the scope of the claims. Character description

[0035] The figures are described in a coherent and comprehensive manner. Identical reference symbols indicate identical components. They show Fig. 1 : a device according to the invention for driving a fastening element into a substrate with an energy transfer element and a pre-tensioned energy transfer device in a sectional view, Fig. 2 : the device according to Fig. 1 with the energy transfer element in the first position and a tensioned energy transfer device in a sectional view, Fig. 3 : the device according to Fig. 1 with the energy transfer element in the area of ​​the second position and a relaxed energy transfer device in a sectional view, Fig. 4 : the device according to Fig. 1 with the energy transfer element in the area of ​​the third position and a relaxed energy transfer device in a sectional view, Fig. 5: a first embodiment of a first energy transfer unit of the device according to Fig. 1 under supervision Fig. 6 : a first embodiment of an energy transfer element of the device according to Fig. 1 in a first position and the first energy transmission unit according to Fig. 5 in a side view, and Fig. 7 : the energy transfer element of the device according to Fig. 6 in the area of ​​the second position in a sectional view, Fig. 8 : a second embodiment of an energy transfer element of the device according to Fig. 1 in the first position and the position-fixed interaction of the first energy transfer unit with the energy transfer element in a sectional view, Fig. 9 : the energy transfer element of the device according to Fig. 8 in the area of ​​the second position and in a sectional view, Fig. 10 : the energy transfer element of the device according to Fig. 8in the area of ​​the third position and in a sectional view, Fig. 11 : a third embodiment of an energy transfer element of the device according to Fig. 1 in the first position and the position-fixed interaction of the first energy transfer unit with the energy transfer element in a sectional view, Fig. 12 : the energy transfer element of the device according to Fig. 11 in the area of ​​the second position and in a sectional view, Fig. 13 : the energy transfer element of the device according to Fig. 11 in the area of ​​the third position and in a sectional view, Fig. 14 : a fourth embodiment of an energy transfer element of the device according to Fig. 1 in the first position and the position-fixed interaction of the first energy transfer unit with the energy transfer element in a side view, and Fig. 15 : the energy transfer element of the device according to Fig. 14in a sectional view. Implementation of the invention

[0036] Figures 1 to 4Figure 20 shows an embodiment of a device for driving a fastener into a substrate, the general structure of the device 20 being disclosed here with a first embodiment of an energy transfer element 30. The device 20 shown is a nail-driving tool for driving nails into concrete or steel, which are generally referred to as fasteners. The device comprises a housing 21, a spring as a mechanical energy storage device 22 for storing energy, and a setting piston as an energy transfer element 30 for transferring energy from the energy storage device 22 to the fastener (not shown). The energy transfer element 30 is designed to move in a channel 23 in the housing 21 in a driving direction 25. The energy transfer device 34, which includes a transmission gear 40, is arranged between the spring and the energy transfer element 30.The energy transfer device 34 serves to transfer energy from the energy storage device 22 to the energy transfer element 30, wherein the energy transfer device 34 comprises at least one belt as a first energy transfer unit 35. The energy transfer element 30 has a coupling section 31 which interacts with the first energy transfer unit 35 in a positionally fixed manner at least in a first position 26 of the energy transfer element 30. The first energy transfer unit 35 is movable along the drive direction 25 from the first position 26 to a second position in the housing 21 together with the energy transfer element 30. The first energy transfer unit 35 extends at least section by section along the energy transfer element 30.

[0037] The first energy transmission unit 35 is tensioned and released by means of deflection pulleys 41 and the spring. At least the first energy transmission unit 35 is moved in the driving direction 25 by means of a spindle drive 42 in order to tension the spring ( Figure 2 ). When the driving process is triggered, the spring is relaxed and the energy transfer element 30 is moved in the driving direction 25 ( Figure 3 During the acceleration of the energy transfer element 30, the force of the spring acts on the energy transfer element 30 via the transmission gear 40 and the first energy transfer unit 35. Subsequently, the energy transfer element 30 is decoupled from the first energy transfer unit 35 ( Figure 4 ).

[0038] The energy transfer element 30 is designed to be inserted into a channel 23 in the housing 21 in a drive direction 25 from a second position 27 (see Figure 3 ) towards a third position 28 (see Figure 4) to move. The first energy transfer unit 35 is a tension element designed as a belt, which extends at least sectionally along the energy transfer element 30 and is designed to detach from the coupling section 31 of the energy transfer element 30 in the second position 27, so that the energy transfer element 30 moves in free flight to the third position 28 in a second phase.

[0039] The first energy transfer unit 35 is arranged section by section in the energy transfer element 30, wherein the energy transfer element 30 has a decoupling section 33 and the first energy transfer unit 34 is transferable at least from the coupling section 31 to the decoupling section 33 when the energy transfer element 30 is in the second phase of the insertion process, or when the energy transfer element 30 has detached from the coupling section 31 in the second position 27. Depending on the distance of the coupling section 31 to the decoupling section 33, the energy transfer element 30 is in free flight along a longer or shorter path in the channel 23 (see Figure 4 ).

[0040] The release of the first energy transfer unit 35 from the coupling section 31 of the energy transfer element 30 in the second position 27 minimizes the recoil of the device 20 towards a user during the driving process of a fastening element, since this recoil path to the housing 21 is interrupted and only a small proportion of the driving energy can be transferred back to the device 20 or is absorbed in the device 20.

[0041] In the area of ​​the third position in the housing 21, a braking device 43 is provided for decelerating the energy transfer element 30. This allows the energy transfer element 30, which is in free flight and in the second phase, to be easily decelerated. For example, the braking device 43 includes a damping element 44 made of plastic to efficiently decelerate the energy transfer element 30 and, if necessary, to accelerate it in the direction opposite to the direction of insertion 25 towards the first energy transfer unit 35. The energy transfer element 30 has a braking section 32 that interacts with the damping element 44 of the braking device 43 during deceleration.

[0042] A return mechanism 50 is provided to return one of the energy transfer elements disclosed herein from a region of the third position 28 to the first position 26. The respective energy transfer element can be returned to the first position 26 in a direction opposite to the direction of insertion 25. The return mechanism 50 comprises return elements 51, 52, which can be coupled to the energy transfer element. The return mechanism 50 uses the spindle drive 42 to return the energy transfer element to the first position 26 by means of the spindle drive 42 and the return elements 51, 52.

[0043] Figure 5Figure 1 shows a first embodiment of the first energy transmission unit 35 for the device 20. The first energy transmission unit 35, designed as a strip, has an opening 36 into which at least the coupling section 31 of the energy transmission element 30 can be inserted, at least section by section. The opening 36 has reinforcements 37 on its sides, so that the opening 36 remains dimensionally stable during operation of the device 20 and tearing of the opening 36 due to tensile forces is prevented.

[0044] The Figure 6 and Figure 7Figure 1 shows the first embodiment of the energy transfer element 30 of the device 20, which is designed as a setting piston. The energy transfer element 30 has a mandrel 38 that can be inserted into the opening 36. The first energy transfer unit 35 is fixed in the first position 26 on the coupling section 31. The first energy transfer unit 35 is arranged section by section in the energy transfer element 30, the energy transfer element 30 having a decoupling section 33. The energy transfer element 30 moves in the channel 23 together with the first energy transfer unit 35 up to the area of ​​the second position 27 and, in the second phase, detaches from the first energy transfer unit 35 to move freely to the third position in the channel 23 and drive the fastening element into the ground (see Figure 1). Figure 7Depending on the distance between the coupling section 31 and the decoupling section 33, the energy transfer element 30 is in free flight along a longer or shorter path in channel 23.

[0045] The Figures 8 to 10Figure 1 shows a second embodiment of the energy transfer element 130 designed as a setting piston. The first energy transfer unit 135 is arranged section by section within the energy transfer element 130, wherein the energy transfer element 130 has a decoupling section 133 and the first energy transfer unit 134 can be moved at least from the coupling section 131 to the decoupling section 133 when the energy transfer element 130 is in the second phase of the insertion process, or when the energy transfer element 130 has detached from the coupling section 131 in the second position 27. Depending on the distance of the coupling section 131 to the decoupling section 133, the energy transfer element 30 is in free flight along a longer or shorter path in the channel 23 (see Figure 1). Figure 9 and Figure 10 The first energy transmission unit 134 is slowed down at the decoupling section 133.

[0046] The Figures 11 to 13show a third embodiment of the energy transfer element 230 designed as a setting piston, wherein the energy transfer element 230 is designed to move in a channel 23 in the housing 21 in a driving direction 25 from a first position 26 (see Figure 11 ) towards a second position 27 (see Figure 12 ) and further to a third position 28 (see Figure 13 ) to move. A further energy transfer unit 240 is present. This further energy transfer unit 240 serves as a coupling element 241 to the energy transfer element 230. The coupling element 241 has a coupling element opening 242 into which the first energy transfer unit 235, designed as a belt, is inserted. The coupling element 241 has a coupling element section 243, which can be connected to the coupling section 231 of the energy transfer element 230. The energy transfer element 230 is in the first position 26 (see Figure 11) coupled with the coupling element 241 and together towards the second position 27 (see Figure 10 ) movable. In the second position 27, the energy transfer element 230 detaches from the first energy transfer unit 235 and the further energy transfer unit 240. The energy transfer element is in free flight in channel 23 of the device 20 until the third position 28.

[0047] The Figure 14 and Figure 15 show a fourth embodiment of the energy transfer element 330 designed as a setting piston, wherein the energy transfer element 330 is configured to move in a channel 23 in the housing 21 in a driving direction 25, as shown in Figures 11 to 13 described. A further energy transmission unit 340 is present, which differs from the further energy transmission unit 240 according to the Figures 11 to 13The first energy transfer unit 335 differs in that its ends are attached to a coupling element 341 of the second energy transfer unit 340, and that the coupling element 341 has a coupling element opening 342 into which the energy transfer element 330 can be inserted section by section. The coupling section 331 of the first energy transfer element 330 couples with the coupling element section 343 of the coupling element 341. The energy transfer element 330 detaches from the coupling element 341 in the second position 27 (not shown).

[0048] An inventive method for driving a fastening element into a substrate, comprising a device 20 for driving a fastening element into a substrate, is described using the following: Figure 1 up to Figure 4 explained. The procedure includes at least the following steps: a) Holding an energy transfer element 30 in a first position 26 with at least one first energy transfer unit 35, wherein the first energy transfer unit 35 extends at least sectionally along the energy transfer element 30; b) Moving the energy transfer element 30 with the at least one first energy transfer unit 35 along a driving direction 25 towards a fastening element, wherein the first energy transfer unit 35 moves with the energy transfer element 30 to a second position 27, and is thereby fixedly abutted against a coupling section 31 of the energy transfer element 30; c) Detaching the first energy transfer unit 35 from the coupling section 31 of the energy transfer element 30 at the second position 27;

[0049] Subsequently, the energy transfer element 30 is returned in the direction against the driving direction 27 of the fastening element, whereby the energy transfer element 30 is returned decoupled from the first energy transfer unit 35.

[0050] The Figures 5 to 7 , Figures 8 to 10 , Figures 11 to 13 as well as the Figure 14 and Figure 15 Figure 1 shows energy transfer elements 30, 130, 230, 330 for a device 20 described herein, with at least one coupling section 31, 131, 231, 331 for coupling the first energy transfer unit 35, 135, 235, 335. Coupling and decoupling the energy transfer element 30, 130, 230, 330 from the first energy transfer unit 35, 135, 235, 335 reduces the recoil in the device 20. Reference symbol list

[0051] 20 Device 21 Housing 22 Energy storage / spring 23 Channel 25 Drive direction 26 First position 27 Second position 28 Third position 30 Energy transfer element / setting piston 31 Coupling section 32 Brake section 33 Decoupling section 34 Energy transfer device 35 First energy transfer unit / belt 36 Opening 37 Reinforcements 38 Mandrel 40 Transmission gear 41 Deflection rollers 42 Spindle drive 43 Brake device 44 Damping element 50 Return device 51 Return element 52 Return element 130 Energy transfer element / setting piston 131 Coupling section 133 Decoupling section 135 First energy transfer unit / belt 230 Energy transfer element / setting piston 231 Coupling section 235 First energy transfer unit / belt 240 Further energy transfer unit 241 Coupling element 242 Coupling element opening 243 Coupling element section 330 Energy transfer element / setting piston 331 Coupling section 335 First energy transfer unit / belt 340 Further energy transfer unit 341 Coupling element 342 Coupling element opening 343 Coupling element section

Claims

1. Device (20) for driving a fastening element into a substrate, comprising a housing (21), an energy storage device (22) for storing energy, an energy transfer element (30; 130; 230; 330) for transferring energy from the energy storage device (22) to the fastening element, wherein the energy transfer element (30; 130; 230; 330) is configured to move within the housing (21) from a first position (26) to at least a second position (27), an energy transfer device (34) for transferring energy from the energy storage device (22) to the energy transfer element (30; 130; 230; 330), wherein the energy transfer device (34) comprises at least one first energy transfer unit (35; 135; 235; 335), characterized by the fact thatthe energy transfer element (30; 130; 230; 330) has a coupling section (31; 131; 231; 331) which interacts in a positionally fixed manner with the first energy transfer unit (35; 135; 235; 335) at least in the first position of the energy transfer element (30; 130; 230; 330) and the first energy transfer unit (35; 135; 235; 335) is movable along a driving direction (25) from the first position (26) to the second position (27) in the housing (21) together with the energy transfer element (30; 130; 230; 330), wherein the first energy transfer unit (35; 135; 235; 335) moves at least section by section along the energy transfer element (30; 130; 230; 330) extends and is designed to detach from the coupling section (31; 131; 231; 331) of the energy transfer element (30; 130; 230; 330) in the second position (27).

2. Device according to claim 1, characterized by the fact thatthe energy transfer element (30; 130; 230; 330) is decoupled from the first energy transfer unit (35; 135; 235; 335) in the housing (21) along the direction of insertion (25) to a third position (28) in order to transfer the energy to the fastening element.

3. Device according to claim 2, characterized by the fact that in the area of ​​the third position (28) in the housing (21) a braking device (43) for braking the energy transfer element (30; 130; 230; 330) is provided.

4. Device according to one of the aforementioned claims, characterized by the fact that which at least one first energy transmission unit (35; 135; 235; 335) is a tensile element.

5. Device according to one of the aforementioned claims, characterized by the fact thatthe first energy transfer unit (35; 135; 235; 335) is arranged at least sectionally in the energy transfer element (30; 130; 230; 330), wherein the energy transfer element (30; 130; 230; 330) has a decoupling section (33; 133) and the first energy transfer unit (35; 135; 235; 335) is transferable at least from the coupling section (31; 131; 231; 331) to the decoupling section (33; 133).

6. Device according to one of the aforementioned claims, characterized by the fact that the first energy transfer unit (35) has at least one opening (36) in which at least the coupling section (31) of the energy transfer element (30) can be inserted at least section by section.

7. Device according to one of the aforementioned claims, characterized by the fact that a return device (50) is provided with which at least the energy transfer element (30; 130; 230; 330) can be returned in a direction opposite to the direction of insertion (25) to the first position (26).

8. Device according to claim 7, characterized by the fact that the feedback device (50) comprises at least one feedback element (51, 52) which can be coupled to the energy transfer element (30; 130; 230; 330).

9. Device according to one of the aforementioned claims, characterized by the fact that a further energy transmission unit (240; 340) is present, which is connected to the first energy transmission unit (35; 135; 235; 335) and can be detached together with the first energy transmission unit (35; 135; 235; 335) in the second position (27) from the energy transmission element (30; 130; 230; 330).

10. Method for driving a fastening element into a substrate using a device for driving a fastening element into a substrate, in particular using the device (20) according to any one of claims 1 to 9, wherein at least the following steps are carried out: a) holding an energy transfer element (30; 130; 230; 330) in a first position (26) with at least one first energy transfer unit (35; 135; 235; 335), wherein the first energy transfer unit (35; 135; 235; 335) extends at least sectionally along the energy transfer element (30; 130; 230; 330); b) Moving the energy transfer element (30; 130; 230; 330) with the at least one first energy transfer unit (35; 135; 235; 335) along a driving direction (35) towards a fastening element, wherein the first energy transfer unit (35; 135; 235; 335) with the energy transfer element (30; 130; 230;330) to a second position (27), and thereby remains fixed in position against a coupling section (31; 131; 231; 331) of the energy transfer element (30; 130; 230; 330). c) Detaching the first energy transfer unit (35; 135; 235; 335) from the coupling section (31; 131; 231; 331) of the energy transfer element (30; 130; 230; 330) at the second position (27); 11. Method according to claim 10, characterized by the fact that the energy transfer element (30; 130; 230; 330) is returned in the direction against the direction of insertion of the fastening element, wherein the energy transfer element (30; 130; 230; 330) is returned in particular decoupled from the first energy transfer unit (35; 135; 235; 335).

12. Method according to claim 11, characterized by the fact that a return of at least the energy transfer element (30; 130; 230; 330) is carried out using a return device (50).

13. Method according to claim 12, characterized by the fact thatthe first energy transfer unit (35; 135; 235; 335) together with the energy transfer element (30; 130; 230; 330) is returned to the first position (26) using the return device (50).

14. Method according to any one of claims 11 to 13, characterized by the fact that the energy transfer element (30; 130; 230; 330) is introduced at least section by section into the first energy transfer unit (35; 135; 235; 335) when being fed back.

15. Energy transfer element (30; 130; 230; 330) for a device (20) according to one of claims 1 to 10, wherein the energy transfer element (30; 130; 230; 330) has at least one coupling section (31; 131; 231; 331) for coupling a first energy transfer unit (35; 135; 235; 335).

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