EP2397268B1 - fastener driving tool - Google Patents

Description

Technical area

The application relates to a device for driving a fastener into a substrate according to the preamble of patent claim 1.

Such a device is for example from the US 2008/0017689 A1 out.

State of the art

Such devices usually have a piston for transmitting energy to the fastener. The energy required for this must be provided in a very short time, which is why, for example, so-called Federnaglern initially a spring is tensioned, which releases the clamping energy abruptly to the piston during the driving operation and accelerates it to the fastener.

The energy with which the fastener is driven into the ground is limited in such devices upwards, so that the devices are not arbitrarily applicable to all fasteners and any surface. It is therefore desirable to provide drive-in devices which can transfer sufficient energy to a fastener.

Presentation of the invention

The invention is defined by a device according to claim 1.

According to one aspect of the application, a device for driving a fastening element into a substrate has a power transmission element for transmitting energy to the fastening element. The Energy transmission element is movable between a starting position and a setting position, wherein the energy transmission element is in the setting position before a driving operation in the starting position and after the driving operation.

According to one aspect of the application, the device comprises a mechanical energy store for storing mechanical energy. The energy transmission element is then preferably suitable for transmitting energy from the mechanical energy store to the fastening element.

According to one aspect of the application, the device comprises an energy transmission device for transmitting energy from an energy source to the mechanical energy store. Preferably, the energy for a driving operation in the mechanical energy storage is temporarily stored to be delivered abruptly to the fastener. The energy transmission device is preferably suitable for conveying the energy transmission element from the setting position into the starting position. Preferably, the energy source is a particular electrical energy storage, more preferably a battery or a rechargeable battery. The device preferably has the energy source.

According to one aspect of the application, the energy transmission device is suitable for conveying the energy transmission element from the setting position in the direction of the starting position, without transmitting energy to the mechanical energy store. This makes it possible for the mechanical energy store to absorb and / or release energy without moving the energy transfer element into the setting position. The energy store can thus be discharged without a fastener is driven out of the device.

According to one aspect of the application, the energy transfer device is suitable for transferring energy to the mechanical energy store without moving the energy transfer element.

According to one aspect of the application, the energy transmission device comprises a power transmission device for transmitting a force from the energy store to the energy transmission element and / or for transmitting a force from the energy transmission device to the mechanical energy store.

According to one aspect of the application, the energy transmission device comprises a carrier element, which can be brought into engagement with the energy transmission element for moving the energy transmission element from the setting position into the starting position.

Preferably, the carrier element allows movement of the energy transfer element from the starting position into the setting position. In particular, the entrainment element abuts only on the energy transfer element, so that the entrainment element entrains the energy transfer element only in one of two opposite directions of movement.

The entrainment element preferably has a longitudinal body, in particular a rod.

According to one aspect of the application, the energy transmission device comprises a linearly movable linear drive, which comprises the entrainment element and is connected to the power transmission device.

According to one aspect of the application, the device comprises a motor with a motor output, wherein the energy transfer device comprises a motion converter for converting a rotational movement into a linear movement with a rotary drive drivable by the motor and the linear drive and a torque transfer device for transmitting a torque from the engine output to the rotary drive ,

Preferably, the motion converter comprises a spindle drive with a spindle and a spindle nut arranged on the spindle. According to a particularly preferred embodiment, the spindle forms the rotary drive and the spindle nut forms the linear drive. According to a further particularly preferred embodiment, the spindle nut forms the rotary drive and the spindle forms the linear drive.

According to one aspect of the application, the linear drive is arranged secured against rotation with respect to the rotary drive by means of the carrier element, in particular by guiding the carrier element in a carrier element guide.

According to one aspect of the application, the energy transmission device comprises a torque transmission device for transmitting a torque from the engine output to the rotary drive and a power transmission device for transmitting a force from the linear output to the energy store.

Preferably, the mechanical energy storage is intended to store potential energy. Particularly preferably, the mechanical energy store comprises a spring, in particular a helical spring.

The mechanical energy store is preferably provided to store rotational energy. Particularly preferably, the mechanical energy store comprises a flywheel.

Particularly preferred are two in particular opposite ends of the spring movable to tension the spring.

Particularly preferably, the spring comprises two spaced-apart and in particular mutually supported spring elements.

According to one aspect of the application, the energy transmission device comprises a power supply device for transmitting energy from a power source to the mechanical energy store and a separate from the power supply device and in particular independently operating return device for conveying the energy transfer element from the setting position to the starting position.

According to one aspect of the application, the device comprises a coupling device for temporarily holding the energy transmission element in the starting position. Preferably, the coupling device is suitable for temporarily holding the power transmission element only in the starting position.

According to one aspect of the application, the device comprises an energy transfer device with a linearly movable linear drive for conveying the energy transfer element from the setting position to the starting position to the coupling device.

According to one aspect of the application on the setting axis or arranged substantially symmetrically about the setting axis.

According to one aspect of the application, the energy transmission element and the linear drive are arranged displaceably relative to the coupling device, in particular in the direction of the setting axis.

According to one aspect of the application, the device comprises a housing in which the energy transmission element, the coupling device and the energy transmission device are accommodated, wherein the coupling device is fastened to the housing. This ensures that particularly sensitive parts of the coupling device are not exposed to the same acceleration forces as, for example, the energy transmission element.

According to one aspect of the application, the spring comprises two spaced-apart and in particular mutually supported spring elements, wherein the coupling device is arranged between the two spaced-apart spring elements.

According to one aspect of the application, the coupling device comprises a locking element movable transversely to the setting axis. Preferably, the locking element is spherical. The locking element preferably has a metal and / or an alloy.

According to one aspect of the application, the coupling device comprises an inner sleeve aligned along the setting axis with a recess extending transversely to the setting axis for receiving the locking element and an outer sleeve engaging around the inner sleeve with a support surface for supporting the locking element. Preferably, the support surface is inclined relative to the setting axis by an acute angle.

According to one aspect of the application, the linear drive is displaceable relative to the energy transmission element, in particular in the direction of the setting axis.

According to one aspect of the application, the coupling device furthermore comprises a return spring acting on the outer sleeve with a force in the direction of the setting axis.

According to one aspect of the application, the device comprises a holding element, wherein the holding element holds the outer sleeve against the force of the return spring in a blocking position of the holding element, and wherein the holding element releases a movement of the outer sleeve due to the force of the return spring in a release position of the holding element.

Preferably, the energy transmission element consists of a rigid body.

Preferably, the energy transmission element has a coupling recess for receiving the locking element.

According to one aspect of the application, the energy transmission element has a recess, wherein the force transmission device extends into the recess, in particular both in the initial position of the energy transmission element and in the setting position of the energy transmission element.

According to one aspect of the application, the recess is designed as a breakthrough and the force transmission device extends through the aperture, in particular both in the initial position of the energy transmission element and in the setting position of the energy transmission element.

According to one aspect of the application, the power transmission device comprises a force deflector for deflecting the direction of a force transmitted by the power transmission device. The force deflector preferably extends into the recess or through the aperture, in particular both in the initial position of the energy transmission element and in the setting position of the energy transmission element. The force deflector is preferably arranged to be movable relative to the mechanical energy store and / or relative to the energy transfer element.

According to one aspect of the application, the device comprises a coupling device for temporarily holding the energy transfer element in the starting position and a tie rod for transmitting a tensile force from the energy transfer device, in particular the linear drive and / or the rotary drive to the coupling device.

According to one aspect of the application, the tie rod comprises a fixedly connected to the coupling device pivot bearing and a fixed to the rotary drive connected and rotatably mounted in the rotary bearing rotary member.

According to one aspect of the application, the force deflector comprises a band.

According to one aspect of the application, the force deflector comprises a rope.

According to one aspect of the application, the force deflector comprises a chain.

According to one aspect of the application, the energy transmission element further comprises a coupling plug for temporary coupling to a coupling device.

According to one aspect of the application, the coupling plug part comprises a coupling recess for receiving a locking element of the coupling device.

According to one aspect of the application, the energy transmission element comprises a shaft, in particular facing the fastening element. Preferably, the shaft has a convex-conical shaft section.

According to one aspect of the application, the recess, in particular the opening, is arranged between the coupling plug part and the shaft.

According to one aspect of the application, the power transmission device, in particular the force deflectors, and the energy transmission device, in particular the linear drive, act on one another with a force, while the energy transmission element transmits energy to the fastening element.

According to one aspect of the application, the energy transmission device comprises a motion converter for converting a rotational movement into a linear movement with a rotary drive and a linear drive and a power transmission device for transmitting a force from the linear drive to the energy store.

According to one aspect of the application, the power transmission device, in particular the force deflector, in particular the belt is attached to the energy transmission device, in particular the linear drive.

According to one aspect of the application, the energy transmission device, in particular the linear drive comprises a bushing, wherein the force transmission device, in particular the force deflector, in particular the band is guided through the implementation and is fixed to a locking element, which together with the power transmission device, in particular the force deflector, in particular the band has an extension transverse to the passage which exceeds the dimensions of the passageway transverse to the passageway. Preferably, the locking element is designed as a pin. According to a further embodiment, the locking element is designed as a ring.

According to one aspect of the application, the power transmission device, in particular the force deflector, in particular the band encompasses the locking element.

According to one aspect of the application, the power transmission device, in particular the force deflector, in particular the band comprises a damping element. Preferably, the damping element between the locking element and the linear drive is arranged.

According to one aspect of the application, the linear drive comprises a damping element.

According to one aspect of the application, the band comprises a plastic matrix interspersed with reinforcing fibers. The plastic matrix preferably comprises an elastomer. Preferably, the reinforcing fibers comprise a strand.

According to one aspect of the application, the tape comprises a woven or scrim of fabric or jelly fibers. Preferably, the woven or gelled fibers comprise plastic fibers.

According to one aspect of the application, the fabric or scrim comprises reinforcing fibers which are different from the tissue or jelly fibers.

The reinforcing fibers preferably comprise glass fibers, carbon fibers, polyamide fibers, in particular aramid fibers, metal fibers, in particular steel fibers, ceramic fibers, basalt fibers, boron fibers, polyethylene fibers, in particular high-performance polyethylene fibers (HPPE fibers), fibers of liquid-crystalline polymers, in particular polyesters, or mixtures thereof.

According to one aspect of the application, the device comprises a delay element for delaying the energy transmission element. Preferably, the delay element has a stop surface for the energy transmission element.

According to one aspect of the application, the device comprises a receiving element for receiving the delay element. Preferably, the receiving element comprises a first support wall for the axial support of the delay element and a second support wall for the radial support of the delay element. Preferably, the receiving element comprises a metal and / or an alloy.

According to one aspect of the application, the housing comprises a plastic and the receiving element is attached only via the housing to the drive device.

According to one aspect of the application, the housing comprises one or more first reinforcing ribs.

Preferably, the first reinforcing rib is adapted to transmit a force acting on the receiving element from the delay element to the drive device.

According to one aspect of the application, the delay element has a greater extent in the direction of the setting axis than the receiving element.

According to one aspect of the application, the device comprises a subsequent to the receiving element guide channel for guiding the fastener. Preferably, the guide channel is arranged displaceably in a guide rail. According to one aspect of the application, the guide channel or the guide rail is firmly connected to the receiving element, in particular monolithically.

According to one aspect of the application, the receiving element is fixedly connected to the housing, in particular with the first reinforcing rib, in particular screwed.

According to one aspect of the application, the receiving element is supported on the housing in the setting direction.

According to one aspect of the application, the housing comprises a support element, which projects into the interior of the housing, wherein the mechanical energy store is attached to the support element. Preferably, the support element comprises a flange.

According to one aspect of the application, the housing comprises one or more second reinforcing ribs adjoining the support element in particular. Preferably, the second reinforcing rib is fixed to the support element, in particular monolithically connected.

According to one aspect of the application, the housing comprises a first housing shell, a second housing shell and a housing seal. The housing seal preferably seals the first housing shell relative to the second housing shell.

According to one aspect of the application, the first housing shell has a first material thickness and the second housing shell has a second material thickness, wherein the housing seal has a sealing material thickness which differs from the first and / or the second material thickness.

Apparatus, wherein the first housing shell comprises a first housing material and the second housing shell comprises a second housing material, and wherein the housing seal comprises a sealing material, which differs from the first and / or the second housing material.

According to one aspect of the application, the housing seal comprises an elastomer.

According to one aspect of the application, the first and / or the second housing shell has a groove in which the housing seal is arranged.

According to one aspect of the application, the housing seal is integrally connected to the first and / or the second housing shell.

According to one aspect of the application, the piston seal seals the guide channel with respect to the energy transmission element.

According to one aspect of the application, the device comprises a pressing device, in particular with a Anpressfühler, for detecting the distance of the device to the ground and a Anpressfühlerdichtung. Preferably, the Anpressfühlerdichtung seals the pressing device, in particular the Anpressfühler, relative to the first and / or second housing shell.

According to one aspect of the application, the piston seal and / or the Anpressfühlerdichtung has a circular ring shape.

According to one aspect of the application, the piston seal and / or the Anpressfühlerdichtung includes a bellows.

According to one aspect of the application, the device comprises a contact element for electrically connecting an electrical energy store to the device, a first electrical line for connecting the electric motor to the motor control device, and a second electrical line for connecting the contact element to the motor control device, wherein the first electrical Line is longer than the second electrical line.

The motor control device preferably supplies the motor with electrical current via the first electrical line in commutated phases.

According to one aspect of the application comprises a handle for gripping the device by a user. Preferably, the housing and the control housing are arranged on opposite sides of the handle.

According to one aspect of the application, the housing and / or the control housing connects to the handle.

According to one aspect of the application, the device comprises a handle sensor for detecting gripping and releasing of the handle by a user.

Preferably, the control device is provided to empty the mechanical energy storage as soon as a release of the handle by a user is detected by means of the handle sensor.

According to one aspect of the application, the handle sensor comprises a switching element which sets the control device in a standby mode and / or in an off state as long as the handle is released, and puts the control device in a normal operation, as long as the handle is gripped by a user.

Preferably, the switching element is a mechanical switch, in particular a galvanic closing switch, a magnetic switch, an electronic switch, a particular electronic sensor or a non-contact proximity switch.

According to one aspect of the application, the handle has a gripping surface, which is grasped when the user grasps the handle by a hand of the user, and wherein the gripping feeler, in particular the switching element, is arranged on the gripping surface.

According to one aspect of the application, the handle has a trigger switch for triggering the driving of the fastening element into the ground and the handle feeler, in particular the switching element, wherein the trigger switch for an operation with the index finger and the handle feeler, in particular the switching element, for an actuation with the middle finger, the ring finger and / or the little finger of the same hand as that of the index finger is provided.

According to one aspect of the application, the handle has a trigger switch for triggering the driving of the fastener into the ground and the switch, wherein the trigger switch for an operation with the index finger and the handle sensor, in particular the switching element, for an operation with the palm and / or the palm of the same hand as that of the index finger is provided.

According to the invention, the drive device comprises a torque transmission device for transmitting a torque from the Motor output on the rotary drive. The torque transmitting device comprises a motor-side rotary member having a first axis of rotation and a Bewegungsungsumwandlerseitiges rotary member with a relation to the first axis of rotation parallel offset second axis of rotation, wherein rotation of the motor-side rotary member about the first axis directly causes rotation of the Bewegungsungsumwandlerseitigen rotary member. The motor-side rotary member is immovable relative to the engine output and slidably disposed relative to the bewegungsumwandlerseitigen rotary member along the first axis of rotation. Due to the decoupling of the motor-side rotary element from the motion converter-side rotary element, the motor-side rotary element together with the motor of the Bewegungsungsumwandlerseitigen rotary element together with the motion converter Schlager coupled.

According to one aspect of the application, the motor-side rotary element is arranged rotatably relative to the motor output and in particular designed as a motor pinion.

According to one aspect of the application, the torque transmission device comprises one or more further rotary elements, which transmit torque from the engine output to the motor-side rotary element, and one or more rotational axes of the one or more rotary elements offset from an axis of rotation of the engine output and / or with respect to the first axis of rotation are arranged. The one or more further rotary elements are then mechanically coupled together with the motor by the motion converter.

According to one aspect of the application, the motion converter-side rotary element is arranged rotationally fixed relative to the rotary drive.

According to one aspect of the application, the torque transmission device comprises one or more further rotary elements, which transmit torque from the motion converter-side rotary element to the rotary drive, and wherein one or more axes of rotation of the one or more rotary elements offset from the second axis of rotation and / or with respect to a rotational axis of the rotary drive are arranged.

According to one aspect of the application, the motor-side rotary element has an engine-side toothing and the motion-converter-side rotary element has a drive-element-side Toothing up. The toothing on the motor side and / or the toothing element-side toothing preferably extends in the direction of the first axis of rotation.

According to one aspect of the application, the drive device comprises a motor damping element which is suitable for absorbing kinetic energy, in particular vibration energy, of the motor with respect to the motion converter.

Preferably, the motor damping element comprises an elastomer.

According to one aspect of the application, the engine damping element is arranged on the engine, in particular annularly around the engine.

According to one aspect of the application, the drive device comprises a holding device which is suitable for holding the engine output against rotation.

According to one aspect of the application, the motor damping element is arranged on the holding device, in particular annularly around the holding device.

Preferably, the engine damping element is in particular firmly bonded to the engine and / or the holding device. Particularly preferably, the motor damping element is vulcanized to the motor and / or the holding device.

Preferably, the motor damping element is arranged on the housing. Particularly preferably, the housing has a particular annular mounting member on which the motor damping element is arranged, in particular fixed. Particularly preferably, the motor damping element is vulcanized to the mounting element.

According to one aspect of the application, the motor damping element seals the motor and / or the holding device relative to the housing.

According to one aspect of the application, the motor comprises a strain relief element on the motor, with which the first electrical line is fixed to the motor at a distance from the electrical connection.

According to one aspect of the application, the housing comprises a housing-side strain relief element, with which the first electrical line is fastened to the housing.

According to one aspect of the application, the housing comprises a motor guide for guiding the motor in the direction of the first axis of rotation.

According to one aspect of the application, the holding device is intended to be moved toward the rotary element, in particular in the direction of the axis of rotation, in order to hold the rotary element against rotation.

According to one aspect of the application, the holding device is electrically actuatable. Preferably, the holding device exerts a holding force on the rotary element when the electrical voltage is present and releases the rotary element when the electrical voltage disappears.

According to one aspect of the application, the holding device comprises a magnetic coil.

According to one aspect of the application, the holding device holds the rotating element by means of a frictional engagement.

According to one aspect of the application, the holding device comprises a wrap spring clutch.

According to one aspect of the application, the holding device holds the rotating element by means of a positive connection.

According to one aspect of the application, the energy transmission device comprises a motor with a motor output, which is uninterruptible power-coupled to the mechanical energy store. Movement of the engine output causes charging or discharging of the energy storage and vice versa. The power flow between the engine output and the mechanical energy storage can not be interrupted, such as by means of a clutch.

According to one aspect of the application, the energy transmission device comprises a motor with a motor output, which is continuously torque-coupled with the motor Rotary drive is connected. A rotation of the engine output causes a rotation of the rotary drive and vice versa. The torque flow between the engine output and the rotary drive can not be interrupted, such as by means of a clutch.

According to one aspect of the application, the device comprises a guide channel for guiding the fastening element, a relative to the guide channel in the direction of the set axis slidably arranged pressing device, in particular with a Anpressfühler, for detecting the distance of the device to the ground in the direction of the setting axis, a blocking element , which in a release position of the blocking element permits a displacement of the pressing device and prevents displacement of the pressing device in a blocking position of the blocking element, and an externally operable unlocking, which holds the blocking element in the release position of the blocking element in an unlocked position of the unlocking element and in a standby position of the Unlocking allows movement of the locking element in the locked position.

According to one aspect of the application, the pressing device allows a transfer of energy to the fastening element only if the pressing device detects a distance of the device to the ground in the direction of the setting axis, which does not exceed a predetermined maximum value.

According to one aspect of the application, the device comprises an engagement spring, which moves the blocking element into the blocking position.

According to one aspect of the application, the guide channel comprises a launching section, wherein a fastening element arranged in the launching section holds the blocking element in the release position, in particular against a force of the engagement spring. The launching section is preferably provided in such a way that the fastening element, which is intended for driving into the ground, is located in the launching section.

Preferably, the guide channel, in particular in the launching section, a Zuführausnehmung, in particular feed opening, through which a fastener is fed to the guide channel.

According to one aspect of the application, the device comprises a feed device for feeding fastening elements to the guide channel. Preferably, the feeder is designed as a magazine.

According to one aspect of the application, the feed device comprises an advancing spring, which holds a fastening element arranged in the firing section in the guide channel. The spring force of the feed spring which acts on the fastening element arranged in the launch section is preferably greater than the spring force of the engagement spring acting on the same fastening element.

According to one aspect of the application, the feed device comprises a feed element acted upon by the feed spring against the guide channel. Preferably, the feed element can be actuated from the outside by a user, in particular displaceable, in order to bring fasteners into the feed device.

According to one aspect of the application, the device comprises a disengaging spring which moves the unlocking element into the waiting position.

Preferably, the blocking element is movable in a first direction between the release position and the blocking position to and fro, and wherein the unlocking element in a second direction between the unlocked position and the waiting position is movable back and forth.

According to one aspect of the application, the feed element can be moved back and forth in the first direction.

Preferably, the first direction is inclined relative to the second direction, in particular inclined at right angles.

According to one aspect of the application, the blocking element comprises a relative to the first direction at an acute angle inclined first displacement surface which faces the unlocking.

According to one aspect of the application, the unlocking element comprises a second displacement surface inclined at an acute angle with respect to the second direction and facing the blocking element.

According to one aspect of the application, the advancing element comprises a third displacement surface inclined at an acute angle with respect to the first direction and facing the unlocking element.

According to one aspect of the application, the unlocking element comprises a fourth displacement surface inclined at an acute angle with respect to the second direction and facing the advancing element.

According to one aspect of the application, the unlocking element comprises a first latching element and the advancing element comprises a second latching element, wherein the first and the second latching element latch together when the unlocking element is moved to the unlocked position.

According to one aspect of the application, the feed element can be moved from the outside by a user away from the guide channel, in particular can be tensioned against the feed spring in order to fill fastening elements in the feed device.

According to one aspect of the application, the locking between the Entsperrelement and the feed element releases when the feed element is moved away from the guide channel.

According to one aspect of the application, in a method of using the apparatus, the motor is operated at a decreasing speed against a load torque exerted by the mechanical energy store on the motor. In particular, the greater the energy stored in the mechanical energy store, the greater the load torque.

According to one aspect of the application, the engine is first operated during a first period with increasing speed against the load torque and then during a second period with steadily decreasing speed against the load torque, wherein the second period is longer than the first period.

According to one aspect of the application, the largest possible load torque is greater than the highest possible engine torque that can be exerted by the engine.

According to one aspect of the application, the motor is supplied with decreasing energy while energy is stored in the mechanical energy storage.

According to one aspect of the application, the speed of the engine is lowered while energy is stored in the mechanical energy storage.

According to one aspect of the application, the motor is intended to be operated with decreasing speed against a load torque which is exerted by the mechanical energy store on the engine.

According to one aspect of the application, the engine controller is adapted to provide the engine with decreasing energy or to lower the speed of the engine while the engine is operating to store energy in the mechanical energy store.

According to one aspect of the application, the device comprises an intermediate energy store which is provided to temporarily store energy delivered by the engine and to deliver it to the mechanical energy store while the engine is operating to store energy in the mechanical energy store.

Preferably, the intermediate energy storage is provided to store rotational energy. In particular, the intermediate energy store comprises a flywheel.

According to one aspect of the application of the intermediate energy storage, in particular the flywheel rotatably connected to the engine output.

According to one aspect of the application, the intermediate energy store, in particular the flywheel, is accommodated in a motor housing of the engine.

According to one aspect of the application, the intermediate energy store, in particular the flywheel, is arranged outside a motor housing of the engine.

According to one aspect of the application, the delay element comprises an abutment element consisting of a metal and / or an alloy with a stop surface for the energy transfer element and an existing of an elastomer impact damping element.

According to one aspect of the application, the mass of the shock-absorbing element is at least 15%, preferably at least 20%, particularly preferably at least 25% of the mass of the stop element. This makes it possible to increase the service life of the shock-absorbing element while at the same time saving weight.

According to one aspect of the application, the mass of the impact-damping element is at least 15%, preferably at least 20%, particularly preferably at least 25%, of the mass of the energy-transferring element. As a result, an increase in the life of the impact damping element is also possible while saving weight.

According to one aspect of the application, a ratio of the mass of the impact damping element to the maximum kinetic energy of the energy transmission element is at least 0.15 g / J, preferably at least 0.20 g / J, particularly preferably at least 0.25 g / J. As a result, an increase in the life of the impact damping element is also possible while saving weight.

According to one aspect of the application, the shock-absorbing element is integrally connected to the stop element, in particular vulcanized onto the stop element.

According to one aspect of the application, the elastomer comprises HNBR, NBR, NR, SBR, IIR and / or CR.

According to one aspect of the application, the elastomer has a Shore hardness which is at least 50 Shore A.

According to one aspect of the application, the alloy comprises a particularly hardened steel.

According to one aspect of the application, the metal, in particular the alloy, has a surface hardness which is at least 30 HRC.

According to one aspect of the application, the stop surface comprises a concave conical section. The cone of the concave-conical section preferably coincides with the cone of the convex-conical section of the energy transmission element.

According to one aspect of the application, in one method, the motor is first speed-controlled in a reset direction and operated essentially load-free, and then operated in a tension direction in order to transfer energy to the mechanical energy store.

The energy source is preferably formed by an electrical energy store.

According to one aspect of the application, a desired current intensity is determined according to predetermined criteria before operating the motor in the clamping direction.

The predetermined criteria preferably include a state of charge and / or a temperature of the electrical energy store and / or an operating time and / or age of the device.

According to one aspect of the application, the motor is intended to be operated substantially load-free in a tensioning direction against the load torque and in a return direction opposite to the tensioning direction. Preferably, the motor control device is provided to regulate the rotation of the motor in the clamping direction, the current absorbed by the motor current to a predetermined desired current and to control the rotation of the motor in the reset direction, the speed of the motor to a predetermined target speed.

According to one aspect of the application, the device comprises the energy source.

According to one aspect of the application, the energy source is formed by an electrical energy store.

According to one aspect of the application, the motor control device is suitable for determining the predetermined desired current intensity according to predetermined criteria.

According to one aspect of the application, the device comprises a safety mechanism by means of which the electrical energy source can be coupled or coupled with the device in such a way that the mechanical energy store is automatically relaxed when the electrical energy source is separated from the device. Preferably, the stored energy in the mechanical energy storage is degraded controlled.

According to one aspect of the application, the device comprises a holding device which holds stored energy in the mechanical energy store and which automatically releases a discharge of the mechanical energy store when the electrical energy source is disconnected from the device.

According to one aspect of the application, the safety mechanism includes an electromechanical actuator that automatically unlocks a barrier device that holds stored energy in the mechanical energy storage when the electrical energy source is disconnected from the device.

According to one aspect of the application, the device comprises a coupling and / or braking device in order to reduce the energy stored in the mechanical energy store in a controlled manner when the mechanical energy store is being discharged.

According to one aspect of the application, the safety mechanism comprises at least one safety switch that short-circuits phases of the electric drive motor in order to reduce energy stored in the mechanical energy store in a controlled manner when the mechanical energy store is being discharged. Preferably, the safety switch is designed as a self-conductive electronic switch, in particular as a J-Fet.

According to one aspect of the application, the motor comprises three phases and is controlled by a 3-phase motor bridge circuit with free-wheeling diodes, which rectify a voltage generated during the discharge of the mechanical energy store.

embodiments

Fig. 1

eine Seitenansicht einer Eintreibvorrichtung,

Fig. 2

eine Explosionsansicht eines Gehäuses,

Fig. 3

eine Explosionsansicht eines Gerüsthakens,

Fig. 4

eine Seitenansicht einer Eintreibvorrichtung mit geöffnetem Gehäuse,

Fig. 5

eine Schrägansicht eines elektrischen Energiespeichers,

Fig. 6

eine Schrägansicht eines elektrischen Energiespeichers,

Fig. 7

eine Teilansicht einer Eintreibvorrichtung,

Fig. 8

eine Teilansicht einer Eintreibvorrichtung,

Fig. 9

eine Schrägansicht einer Steuereinrichtung mit Verkabelung,

Fig. 10

einen Längsschnitt eines Elektromotors,

Fig. 11

eine Teilansicht einer Eintreibvorrichtung,

Fig. 12a

eine Schrägansicht eines Spindeltriebs,

Fig. 12b

einen Längsschnitt eines Spindeltriebs,

Fig. 13

eine Schrägansicht einer Spannvorrichtung,

Fig. 14

eine Schrägansicht einer Spannvorrichtung,

Fig. 15

eine Schrägansicht eines Rollenhalters,

Fig. 16

einen Längsschnitt einer Kupplung,

Fig. 17

einen Längsschnitt eines eingekuppelten Kolbens,

Fig. 18

eine Schrägansicht eines Kolbens,

Fig. 19

eine Schrägansicht eines Kolbens mit einem Verzögerungselement,

Fig. 20

eine Seitenansicht eines Kolbens mit einem Verzögerungselement,

Fig. 21

einen Längsschnitt eines Kolbens mit einem Verzögerungselement,

Fig. 22

eine Seitenansicht eines Verzögerungselementes,

Fig. 23

einen Längsschnitt eines Verzögerungselementes,

Fig. 24

eine Teilansicht einer Eintreibvorrichtung,

Fig. 25

eine Seitenansicht einer Anpresseinrichtung,

Fig. 26

eine Teilansicht einer Anpresseinrichtung ,

Fig. 27

eine Teilansicht einer Anpresseinrichtung ,

Fig. 28

eine Teilansicht einer Anpresseinrichtung ,

Fig. 29

eine Teilansicht einer Eintreibvorrichtung,

Fig. 30

eine Schrägansicht einer Bolzenführung,

Fig. 31

eine Schrägansicht einer Bolzenführung,

Fig. 32

eine Schrägansicht einer Bolzenführung,

Fig. 33

einen Querschnitt einer Bolzenführung,

Fig. 34

einen Querschnitt einer Bolzenführung,

Fig. 35

eine Teilansicht einer Eintreibvorrichtung,

Fig. 36

eine Teilansicht einer Eintreibvorrichtung,

Fig. 37

ein Aufbauschema einer Eintreibvorrichtung,

Fig. 38

ein Schaltdiagramm einer Eintreibvorrichtung,

Fig. 39

ein Zustandsdiagramm einer Eintreibvorrichtung,

Fig. 40

ein Zustandsdiagramm einer Eintreibvorrichtung,

Fig. 41

ein Zustandsdiagramm einer Eintreibvorrichtung,

Fig. 42

ein Zustandsdiagramm einer Eintreibvorrichtung,

Fig. 43

einen Längsschnitt einer Eintreibvorrichtung,

Fig. 44

einen Längsschnitt einer Eintreibvorrichtung und

Fig. 45

einen Längsschnitt einer Eintreibvorrichtung.

Hereinafter, embodiments of a device for driving a fastener into a substrate will be explained in more detail by way of examples with reference to the drawings. Show it:

Fig. 1

a side view of a drive-in device,

Fig. 2

an exploded view of a housing,

Fig. 3

an exploded view of a scaffold hook,

Fig. 4

a side view of a driving device with the housing open,

Fig. 5

an oblique view of an electrical energy storage,

Fig. 6

an oblique view of an electrical energy storage,

Fig. 7

a partial view of a drive-in device,

Fig. 8

a partial view of a drive-in device,

Fig. 9

an oblique view of a control device with wiring,

Fig. 10

a longitudinal section of an electric motor,

Fig. 11

a partial view of a drive-in device,

Fig. 12a

an oblique view of a spindle drive,

Fig. 12b

a longitudinal section of a spindle drive,

Fig. 13

an oblique view of a clamping device,

Fig. 14

an oblique view of a clamping device,

Fig. 15

an oblique view of a roll holder,

Fig. 16

a longitudinal section of a coupling,

Fig. 17

a longitudinal section of a coupled piston,

Fig. 18

an oblique view of a piston,

Fig. 19

an oblique view of a piston with a delay element,

Fig. 20

a side view of a piston with a delay element,

Fig. 21

a longitudinal section of a piston with a delay element,

Fig. 22

a side view of a delay element,

Fig. 23

a longitudinal section of a delay element,

Fig. 24

a partial view of a drive-in device,

Fig. 25

a side view of a pressing device,

Fig. 26

a partial view of a pressing device,

Fig. 27

a partial view of a pressing device,

Fig. 28

a partial view of a pressing device,

Fig. 29

a partial view of a drive-in device,

Fig. 30

an oblique view of a bolt guide,

Fig. 31

an oblique view of a bolt guide,

Fig. 32

an oblique view of a bolt guide,

Fig. 33

a cross section of a bolt guide,

Fig. 34

a cross section of a bolt guide,

Fig. 35

a partial view of a drive-in device,

Fig. 36

a partial view of a drive-in device,

Fig. 37

a construction diagram of a drive-in device,

Fig. 38

a circuit diagram of a driving-in device,

Fig. 39

a state diagram of a drive-in device,

Fig. 40

a state diagram of a drive-in device,

Fig. 41

a state diagram of a drive-in device,

Fig. 42

a state diagram of a drive-in device,

Fig. 43

a longitudinal section of a driving-in device,

Fig. 44

a longitudinal section of a driving-in and

Fig. 45

a longitudinal section of a driving-in device.

Fig. 1 shows a driving-in device 10 for driving a fastener, such as a nail or bolt, into a ground in a side view. The driving-in device 10 has an energy transmission element (not shown) for transmitting energy to the fastening element and a housing 20, in which the energy transmission element and a likewise not shown drive device for conveying the energy transmission element are accommodated.

The driving-in device 10 furthermore has a handle 30, a magazine 40 and a bridge 50 connecting the handle 30 to the magazine 40. The magazine is not removable. Attached to the bridge 50 are a scaffold hook 60 for suspending the driving-in device 10 on a scaffold or the like, and an electrical energy store designed as a battery 590. On the handle 30, a trigger 34 and designed as a hand switch 35 Grifffühler are arranged. Furthermore, the driving-in device 10 has a guide channel 700 for guiding the fastening element and a pressing device 750 for detecting a distance of the driving-in device 10 from a substrate, not shown. Aligning the driving device perpendicular to a substrate is supported by an alignment aid 45.

Fig. 2 shows the housing 20 of the drive-in device 10 in an exploded view. The housing 20 has a first housing shell 27, a second housing shell 28 and a housing seal 29, which seals the first housing shell 27 against the second housing shell 28, so that the interior of the housing 20 is protected against dust and the like. In one embodiment, not shown, the housing seal 29 is made of an elastomer and molded onto the first housing shell 27.

The housing has reinforcing ribs 21 and second reinforcing ribs 22 for reinforcement against impact forces during the driving of a fastening element into a substrate. A retaining ring 26 serves to hold a delay element, not shown, which is accommodated in the housing 20. The retaining ring 26 is preferably made of plastic, in particular injected, and part of the housing. The retaining ring 26 has a Anpressführung 36 for guiding a connecting rod, not shown, of a pressing device.

Furthermore, the housing 20 has a motor housing 24 with ventilation slots for receiving a motor, not shown, and a magazine 40 with a magazine rail 42. In addition, the housing 20 has a handle 30, which comprises a first gripping surface 31 and a second gripping surface 32. The two gripping surfaces 31, 32 are preferably plastic films sprayed onto the handle 30. A trigger 34 and designed as a hand switch 35 Grifffühler are arranged on the handle 30.

Fig. 3 shows a scaffold hook 60 with a spacer 62 and a retaining element 64, which has a pin 66 which is fixed in a bridge passage 68 of the bridge 50 of the housing. For fixing serves a screw sleeve 67, which is secured by a retaining spring 69 against loosening. The scaffold hook 60 is intended to be suspended with the retaining element 64 in a scaffold strut or the like to hang the driving device 10, for example, during breaks in work on a scaffold or the like.

Fig. 4 shows the driving device 10 with the housing 20 open. In the housing 20, a drive device 70 for carrying a hidden in the drawing energy transfer element is added. The drive device 70 comprises a not shown electric motor for converting electrical energy from the battery 590 in rotational energy, a transmission 400 comprising a torque transmitting device for transmitting a torque of the electric motor to a trained as spindle drive motion converter 300, a roller train 260 comprehensive power transmission device for transmitting a force from the motion converter to a designed as a spring 200 mechanical energy storage and for transmitting a force from the spring to the energy transfer element.

Fig. 5 shows the trained as a battery 590 electrical energy storage in an oblique view. The battery 590 has a battery housing 596 with a recessed grip 597 for improved grip of the battery 590. Furthermore, the battery 590 has two retaining rails 598, with which the battery 590 similar to a carriage in not shown corresponding retaining grooves of a housing can be inserted. For an electrical connection, the battery 590 battery contacts, not shown, which are arranged under a protective against splash water contact cover 591.

Fig. 6 shows the battery 590 in another oblique view. On the retaining rails 598 locking lugs 599 are provided which prevent falling out of the battery 590 from the housing. Once the battery 590 is inserted into the housing, the locking lugs 599 are pushed by a corresponding geometry of the grooves against a spring force to the side and locked. By squeezing the recessed grips, the latching is released so that the battery 590 can be removed from the housing by a user by means of thumb and the fingers of one hand.

Fig. 7 shows the driving device 10 with the housing 20 in a partial view. The housing 20 has a handle 30 as well as a bridge 50 projecting substantially perpendicularly from the handle at its end, with a framework hook 60 attached thereto. Furthermore, the housing 20 has a battery receptacle 591 for receiving a battery. The battery receptacle 591 is disposed at the end of the handle 30 from which the bridge protrudes.

The battery receptacle 591 has two retaining grooves 595, in which not shown corresponding retaining rails of a battery can be inserted. For an electrical connection of the rechargeable battery, the rechargeable battery receptacle 591 has a plurality of contact elements designed as device contacts 594, which power contact elements and Comprise communication contact elements. The battery holder 591 is suitable, for example, for receiving the in Fig. 5 and Fig. 6 shown batteries.

Fig. 8 shows the driving device 10 with the housing 20 open in a partial view. In the bridge 50 of the housing 20, which connects the handle 30 with the magazine 40, a control device 500 is arranged, which is accommodated in a control housing 510. The control device comprises power electronics 520 and a cooling element 530 for cooling the control device, in particular the power electronics 520.

The housing 20 has a battery receptacle 591 with device contacts 594 for an electrical connection of a battery, not shown. A battery accommodated in the battery receptacle 591 is electrically connected to the control device 500 via battery lines 502 and thus supplies the driving device 10 with electrical energy.

Furthermore, the housing 20 has a communication interface 524 with a display 526 visible to a user of the device and a preferably optical data interface 528 for an optical data exchange with a read-out device.

Fig. 9 shows the controller 500 and the outgoing from the controller 500 wiring in a driving device in an oblique view. The control device 500 is accommodated with the power electronics 520 and the cooling element 530 in the control housing 510. The control device 500 is connected via battery lines 502 with device contacts 594 for an electrical connection of a battery, not shown.

Cable strands 540 serve to electrically connect the control device 500 to a plurality of components of the drive-in device such as, for example, motors, sensors, switches, interfaces or display elements. For example, the control device 500 is connected to the Anpresssensor 550, the manual switch 35, a fan drive 560 of a fan 565 and phase lines 504 and a motor holder 485 with an electric motor, not shown, which is held by the motor holder.

In order to protect a contacting of the phase lines 504 from damage due to movements of the motor 480, the phase lines 504 are in an engine-side strain relief element 494 and in a concealed in the drawing set the housing-side strain relief element, wherein the motor-side strain relief is attached directly or indirectly to the motor holder 485 and the housing-side strain relief is attached directly or indirectly to a housing, not shown, the driving device, in particular a motor housing of the motor.

The motor, the motor holder 485, the strain relief elements 494, the fan 565 and the fan drive 560 are in the motor housing 24 from Fig. 2 added. The motor housing 24 is sealed relative to the rest of the housing by means of the line seal 570 in particular against dust.

Since the control device 500 is arranged on the same side of the handle, not shown, as the device contacts 594, the battery leads 502 are shorter than the phase lines passing through the handle 504. Since the battery leads transport a larger current and have a larger cross-section than the phase lines, is a shortening of the battery lines at the expense of an extension of the phase lines overall advantageous.

Fig. 10 shows an electric motor 480 with a motor output 490 in a longitudinal section. The motor 480 is configured as a brushless DC motor and has motor coils 495 for driving the motor output 490, which comprises a permanent magnet 491. The motor 480 is held by a motor holder, not shown, and supplied by means of the crimp contacts 506 with electrical energy and controlled by the control line 505.

On the motor output 490, a motor-side rotary element designed as a motor pinion 410 is fixed against rotation by a press fit. The motor pinion 410 is driven by the engine output 490 and in turn drives a torque transfer device, not shown. A holding device 450 is rotatably mounted on the one hand by means of a bearing 452 on the motor output 490 and on the other hand by means of an annular mounting member 470 rotatably connected to the motor housing. Between the holding device 450 and the mounting member 470 a likewise annular motor damping element 460 is arranged, which serves to dampen relative movements between the motor 480 and the motor housing.

Preferably, the motor damping element 460 alternatively or simultaneously serves the seal against dust and the like. Together with the line seal 570, the motor housing 24 is sealed from the rest of the housing, wherein the fan 565 sucks air through the ventilation slots 33 for cooling the motor 480 and the remaining drive device is protected from dust.

The holding device 450 has a magnetic coil 455, which exerts an attraction force on one or more magnet armatures 456 when energized. The armature 456 extend in trained as openings anchor recesses 457 of the motor pinion 410 and are thus rotationally fixed to the motor pinion 410 and thus arranged on the motor output 490. Due to the attraction, the armature 456 are pressed against the holding device 450, so that a rotational movement of the motor output 490 is braked or prevented relative to the motor housing.

Fig. 11 shows the driving-in device 10 in a further partial view. The housing 20 has the handle 30 and the motor housing 24. In the motor housing 24 only partially shown, the motor 480 is received with the motor bracket 485. On the engine output, not shown, of the motor 480, the motor pinion 410 sits with the armature recess 457 and the holding device 450.

The motor pinion 410 drives gears 420, 430 of a transmission 400 designed as a torque transmission device. The transmission 400 transmits a torque of the motor 480 to a spindle wheel 440 which is non-rotatably connected to a spindle 310 formed as a rotary drive of a motion converter, not shown. The transmission 400 has a reduction, so that a greater torque is applied to the spindle 310 than to the engine output 490.

In order to protect the motor 480 against large accelerations which occur during a driving operation in the drive-in device 10, in particular in the housing 20, the motor 480 is decoupled from the housing 20 and the spindle drive. Since a rotation axis 390 of the motor 480 is oriented parallel to a setting axis 380 of the driving-in device 10, a decoupling of the motor 480 in the direction of the rotation axis 390 is desirable. This is accomplished by the motor pinion 410 and the gear 420 driven directly by the motor pinion gear 410 being displaceable relative to each other in the direction of the setting axis 380 and the rotation axis 390.

The motor 480 is thus attached only via the motor damping element 460 to the housing-mounted mounting member 470 and thus to the housing 20. The mounting member 470 is held by a notch 475 secured against rotation in a corresponding mating contour of the housing 20. In addition, the motor is slidably mounted only in the direction of its axis of rotation 390, namely via the motor pinion 410 on the gear 420 and via a guide element 488 of the motor holder 485 on a correspondingly shaped, not shown, the motor housing of the motor housing 24th

Fig. 12a shows a trained as a spindle drive 300 motion converter in an oblique view. The spindle drive 300 has a rotary drive designed as a spindle 310 and a linear drive formed as a spindle nut 320. An unillustrated internal thread of the spindle nut 320 is engaged with an external thread 312 of the spindle.

If the spindle 310 is then rotationally driven by means of the spindle wheel 440 fastened non-rotatably to the spindle 310, the spindle nut 320 moves linearly along the spindle 310. The rotational movement of the spindle 310 is thus converted into a linear movement of the spindle nut 320. In order to prevent co-rotation of the spindle nut 320 with the spindle 310, the spindle 320 has an anti-twist device in the form of driving elements 330 fastened to the spindle nut 320. The driving elements 330 are guided for this purpose in guide slots, not shown, of a housing or a housing-fixed component of the driving-in device.

Furthermore, the driving elements 330 are formed as return rods for retrieving a piston, not shown, in its initial position and have barbs 340 which engage in corresponding Rückholzapfen the piston. A slot-shaped magnet holder 350 serves to receive a magnet armature, not shown, on which an unillustrated spindle sensor responds to detect a position of the spindle nut 320 on the spindle 310.

Fig. 12b shows the spindle drive 300 with the spindle 310 and the spindle nut 320 in a partial longitudinal section. The spindle nut has an internal thread 328, which is in engagement with the external thread 312 of the spindle.

A designed as a band 270 force deflector a power transmission device for transmitting a force from the spindle nut 320 to a mechanical energy storage, not shown, is attached to the spindle nut 320. For this purpose, the spindle nut 320 in addition to an internal threaded sleeve 370 an outer clamping sleeve 375, wherein a between the threaded sleeve 370 and the clamping sleeve 375 circumferential gap forms a passage 322. The tape 270 is passed through the passage 322 and fixed to a locking element 324 by the tape 270 engages around the locking element 324 and again fed back through the passage 322, where a tape end 275 is sewn to the tape 270. Preferably, the locking element as well as the bushing 322 is circumferentially formed as a locking ring.

Transverse to the bushing 322, ie with respect to a spindle axis 311 in the radial direction, the locking element 324 together with the formed belt loop 278 has a greater width than the bushing 322. Thus, the locking element 324 with the belt loop 278 can not slip through the bushing 322 therethrough so that the tape 270 is attached to the spindle nut 320.

By attaching the band 270 to the spindle nut 320 ensures that a clamping force of the mechanical energy storage, not shown, which is designed in particular as a spring, is deflected by the belt 270 and transmitted directly to the spindle sleeve 320. The clamping force is transmitted from the spindle nut 320 via the spindle 310 and a tie rod 360 to a coupling device, not shown, which holds a likewise not shown, engaged piston. The tie rod has a spindle mandrel 365, which on the one hand firmly connected to the spindle 310 and on the other hand is rotatably mounted in a spindle bearing 315.

Since the clamping force is also exerted on the piston, but in the opposite direction, the tensile forces which are exerted on the tie rod 360, cancel in essence, so that a not shown housing on which the tie rod 360 is supported, in particular fixed , is relieved. The band 270 and the spindle nut 320 act on each other with the clamping force while the piston is accelerated to an unillustrated fastener.

Fig. 13 shows a designed as a pulley 260 power transmission device for transmitting a force to a spring 200 in an oblique view. The pulley 260 has a force deflector formed by a band 270 and a front roller holder 281 with front rollers 291 and a rear roller holder 282 with rear rollers 292 on. The roller holders 281, 282 are preferably made of a particular fiber-reinforced plastic. The roller holders 281, 282 have guide rails 285 for guiding the roller holders 281, 282 in a housing, not shown, of the driving device, in particular in grooves of the housing.

The band is engaged with the spindle nut and a piston 100 and is placed over the rollers 291, 292 so that the pulley 260 is formed. The piston 100 is engaged in a coupling device, not shown. The pulley train translates a speed of the spring ends 230, 240 to a speed of the piston 100 by a factor of two.

Furthermore, a spring 200 is shown which comprises a front spring element 210 and a rear spring element 220. The front spring end 230 of the front spring member 210 is received in the front roller holder 281 while the rear spring end 240 of the rear spring member 220 is received in the rear roller holder. The spring elements 210, 220 are supported on support rings 250 on their mutually facing sides. Due to the symmetrical arrangement of the spring elements 210, 220, repulsive forces of the spring elements 210, 220 cancel, so that the ease of operation of the driving-in device is improved.

Furthermore, a spindle drive 300 with a spindle wheel 440, a spindle 310 and a spindle nut arranged inside the rear spring element 220 is shown, wherein a driving element 330 fastened to the spindle nut can be seen.

Fig. 14 shows the pulley 260 in a tensioned state of the spring 200. The spindle nut 320 is now at the coupling end of the spindle 310 and pulls the tape 270 into the rear spring element. As a result, the roller holders 281, 282 are moved toward one another and the spring elements 210, 220 are tensioned. The piston 100 is held by the coupling device 150 against the spring force of the spring elements 210, 220.

Fig. 15 shows a spring 200 in an oblique view. The spring 200 is designed as a helical spring and made of steel. One end of the spring 200 is in a roll holder 280 received, the other end of the spring 200 is attached to a support ring 250. The roll holder 280 has rollers 290 which protrude from the roll holder 280 on the side of the roll holder 280 facing away from the spring 200. The rollers are rotatably supported about mutually parallel axes and allow a belt, not shown, to be drawn into the interior of the spring 200.

Fig. 16 shows a coupling device 150 for a temporary holding a power transmission element, in particular piston, in a longitudinal section. Furthermore, the tie rod 360 is shown with the spindle bearing 315 and the spindle mandrel 365.

The coupling device 150 has an inner sleeve 170 and an outer sleeve 180 which is displaceable relative to the inner sleeve 170. The inner sleeve 170 is provided with recesses 175 formed as apertures, wherein in the recesses 175 formed as balls 160 locking elements are arranged. In order to prevent the balls 160 from falling out into an inner space of the inner sleeve 170, the recesses 175 inwardly taper in particular conically to a cross section through which the balls 160 do not pass. In order to lock the coupling device 150 with the aid of the balls 160, the outer sleeve 180 has a support surface 185, on which the balls 160 in a locked state of the coupling device 150, as in Fig. 16 shown, are supported to the outside.

In the locked state, therefore, the balls 160 project into the interior of the inner sleeve and hold the piston in the coupling. A retaining element formed as a pawl 800 holds the outer sleeve in the illustrated position against the spring force of a return spring 190. The pawl is biased by a pawl spring 810 against the outer sleeve 180 and engages behind a protruding from the outer sleeve 180 coupling pin.

To release the clutch device 150, the pawl 800 is moved away from the outer sleeve 180 against the spring force of the pawl spring 810, for example by actuating a trigger, so that the outer sleeve 180 is moved to the left by the return spring 190 in the drawing. The outer sleeve 180 has on its inside recesses 182, which can then accommodate the balls 160, which slide along the inclined support surfaces in the recesses 182 and release the interior of the inner sleeve.

Fig. 17 shows a further longitudinal section of the coupling device 150 with engaged piston 100. The piston has for this purpose a coupling male part 110 with coupling recesses 120, in which the balls 160 of the coupling device 150 can engage. Furthermore, the piston 100 has a shoulder 125 and a band feedthrough 130 and a convex-conical portion 135. The balls 160 are preferably made of hardened steel.

An engagement of the piston 100 in the coupling device 150 begins in an unlocked state of the coupling device 150, in which the acted upon by the return spring 190 outer sleeve 180 allows receiving the balls 160 in the recesses 182. The piston 100 can therefore displace the balls 160 to the outside during insertion of the piston 100 into the inner sleeve 170. With the aid of paragraph 125, the piston 100 then displaces the outer sleeve 180 against the force of the return spring 190. As soon as the pawl 800 is engaged with the coupling pin 195, the coupling device 150 is held in the locked state.

The piston 100 includes a shaft 140 and a head 142, wherein the shaft 140 and the head 142 are preferably brazed together. A positive connection in the form of a shoulder 144 prevents the shank 140 from slipping out of the head 142 in the event of a breakage of the solder joint 146.

Fig. 18 shows an embodied as a piston 100 energy transfer element in an oblique view. The piston has a shaft 140, a convex-conical section 135 and a recess formed as a band lead-through 130. The tape feedthrough 130 is designed as a slot and has to protect the belt only rounded edges and coated surfaces. At the tape feedthrough closes a coupling plug 110 with coupling recesses 120 at.

Fig. 19 shows the piston 100 together with a delay element 600 in an oblique view. The piston has a shaft 140, a convex-conical section 135 and a recess formed as a band lead-through 130. At the tape feedthrough closes a coupling plug 110 with coupling recesses 120 at. Furthermore, the piston 100 has a plurality of Rückholzapfen 145 for engagement of driving elements, not shown, for example, associated with a spindle nut.

The delay element 600 has a stop surface 620 for the convex-conical portion 135 of the piston 100 and is received in a receiving element, not shown. The delay element 600 is held by a retaining ring, not shown, in the receiving element, wherein the retaining ring bears against a retaining shoulder 625 of the delay element 600.

Fig. 20 shows the piston 100 together with the delay element 600 in a side view. The piston has a shaft 140, a convex-conical section 135 and a band leadthrough 130. At the tape feedthrough closes a coupling plug 110 with coupling recesses 120 at. The delay element 600 has a stop surface 620 for the convex-conical portion 135 of the piston 100 and is received in the receiving element, not shown.

Fig. 21 shows the piston 100 together with the delay element 600 in a longitudinal section. The stop surface 620 of the delay element 600 is adapted to the geometry of the piston 100 and therefore also has a konvexkonischen section. As a result, a flat impact of the piston 100 is ensured against the delay element 600. Thus, excess energy of the piston 100 is sufficiently absorbed by the delay element. Furthermore, the delay element 600 has a piston passage 640, through which the shaft 140 of the piston 100 extends.

Fig. 22 shows the delay element 600 in a side view. The delay element 600 has a stop element 610 and a shock-absorbing element 630, which adjoin one another along a set axis S of the drive-in device. Excess impact energy of a piston, not shown, is first taken up by the stop element 610 and then damped by the impact damping element 630, that is, extended in time. The impact energy is finally absorbed by the receiving element, not shown, which has a bottom as the first support wall for supporting the delay element 600 in the direction of impact and a side wall as a second support wall for supporting the delay element 600 transverse to the direction of impact.

Fig. 23 shows the delay element 600 with the holder 650 in a longitudinal section. The delay element 600 has a stop element 610 and a Impact damping element 630, which adjoin one another along a set axis S of the driving device. The stop element 610 is made of steel, while the impact damping element 630 is made of an elastomer. A mass of the shock-absorbing element 630 is preferably between 40% and 60% of a mass of the stop element.

Fig. 24 shows the driving device 10 in an oblique view with the housing 20 open. In the housing, the front roller holder 281 can be seen. The delay element 600 is held in position by the retaining ring 26. The nose 690 has, among other things, the Anpressfühler 760 and the unlocking 720. The pressing device 750 has the guide channel 700, which preferably comprises the Anpressfühler 760, and the connecting rod 770. The magazine 40 has the feed element 740 and the feed spring 735.

Furthermore, the driving-in device 10 has an unlocking switch 730 for unlocking the guide channel 700, so that the guide channel 700 can be removed, for example in order to be able to remove jammed fastening elements more easily.

Fig. 25 shows a pressing device 750 in a side view. The pressing device comprises a Anpressfühler 760, an upper push rod 780, a connecting rod 770 for connecting the upper push rod 780 with the Anpressfühler 760, connected to a front roller holder 281 lower push rod 790 and hinged to the upper push rod 780 and to the lower push rod crossbar 795. A trigger bar 820 is connected to a trigger 34 at one end. The crossbar 795 has a slot 775. Furthermore, a coupling device 150 is shown, which is held by a pawl 800 in a locked position.

Fig. 26 Shown is the top push bar 780, the bottom push bar 790, the crossbar 795 and the trigger bar 820. The trigger bar 820 has a trigger deflector 825 projecting laterally from the trigger bar. Also shown is a pin element 830, which has a trigger pin 840 and is guided in a pawl guide 850. The trigger pin 840 is in turn guided in the slot 775. Furthermore, it is clear that the lower push rod 790 has a pin lock 860.

Fig. 27 shows a further partial view of the pressing device 750. Shown are the crossbar 795, the trigger bar 820 with the trigger deflector 825, the pin member 830, the trigger pin 840, the pawl guide 850 and the pawl 800th

Fig. 28 shows the trigger 34 and the trigger bar 820 in an oblique view, but from the other side of the device than the previous figures. The trigger has a trigger actuator 870, a trigger spring 880 and a trigger rod spring 828, which acts on the trigger deflector 825, on. Furthermore, it is clear that the trigger bar 820 is laterally provided with a spigot 822, which is arranged at the level of the trigger pin 840.

To allow a user of the drive-in device to initiate a drive-in operation by pulling the trigger 34, the trigger pin 840 must engage with the notch 822. Only then causes namely a downward movement of the trigger bar 820 entrainment of the trigger pin 840 and thus on the pawl guide 850 a downward movement of the pawl 800, whereby the coupling device 150 unlocked and the driving operation is triggered. Pulling the trigger 34 in each case causes downward movement of the trigger bar 820 via the tapered trigger deflector 825.

The prerequisite for the trigger pin 840 to engage with the notch 822 is that the slot 775 in the crossbar 795 is in its rearmost position, that is, in the drawing on the right. In the position, which for example in Fig. 26 is shown, the slot 775 and thus also the trigger pin 840 is too far forward, so that the trigger pin 840 is not engaged with the spigot 822. Pulling the trigger 34 thus goes into the void. The reason for this is that the upper push rod 780 is in its forward position and thus indicates that the drive-in device is not pressed against a substrate.

A similar situation arises when a spring, not shown, is not tensioned. Then, namely the front roller holder 281 and thus also the lower push rod 790 in their respective forward position, so that the slot 775 again brings the trigger pin 840 out of engagement with the notch 822. As a result, pulling the trigger 34 even into the void, when the spring is not cocked.

Another situation is in Fig. 25 shown. There, the drive-in device is pressed both in a eintreibbereiten state, namely with cocked spring, as well as to a substrate. Thus, the upper push rod 780 and the lower push rod 790 are in their respective rearmost positions. The slot 775 of the crossbar 795 and thus also the trigger pin 740 are then also in their respective rearmost position, right in the drawing. As a result, the trigger pin 740 engages the notch 722, and pulling the trigger 34 causes the trigger bar 820 to carry the trigger pin 740 downwardly through the key notch 722. About the pin member 830 and the pawl guide 850, the pawl 800 is also deflected against the spring force of the pawl spring 810 down, so that the coupling device 150 is transferred to its unlocked position and an unlocked in the coupling means 150 piston, the clamping energy of the spring transmits to a fastener ,

To counteract the risk that the pawl 800 is deflected by a shock, for example, when a user unsaid the drive-in device in the tensioned state of the spring, the lower push rod 790 is provided with the pin lock 860. Namely, the driving device is in the in Fig. 26 illustrated state. Characterized in that the pin lock 860 prevents the pin 840 and thus the pawl 800 to a downward movement, the driving device secures against such accidental release of a driving operation.

Fig. 29 shows the second housing shell 28 of the housing otherwise not shown. The second housing shell 28 consists of a particular fiber-reinforced plastic and has parts of the handle 30, the magazine 40 and the handle 30 with the magazine 40 connecting bridge 50. Furthermore, the second housing shell 28 support elements 15 for a support against the first housing shell, not shown. Furthermore, the second housing shell 28 has a guide groove 286 for a guide of roller holders, not shown.

To accommodate a delay element, not shown, for delaying a power transmission element or a retainer carrying the holder, the second housing shell 28 a support flange 23 and a retaining flange 19, wherein the delay element or the holder is received in a gap 18 between the support flange 23 and the retaining flange 19 , The delay element or the holder is then in particular at the Supporting flange supported. To initiate impact forces, which occur by impact of the piston on the delay element, with reduced voltage spikes in the housing, the second housing shell 28 on first reinforcing ribs 21 which are connected to the support flange 23 and / or the retaining flange 19.

For fixing a drive device for conveying the energy transfer element from the starting position into the setting position and back, which is accommodated in the housing, the second housing shell 28 has two support elements formed as flanges 25. In order to transfer clamping forces, which occur in particular between the two flanges 25, and / or to introduce them into the housing, the second housing shell 28 has second reinforcing ribs 22, which are connected to the flanges 25.

The holder is fastened to the drive device only via the housing, so that impact forces which are not completely absorbed by the retardation element are transferred to the drive device only via the housing.

Fig. 30 shows a nose 690 of a device for driving a fastener into a substrate in an oblique view. The nose 690 comprises a guide channel 700 for guiding the fastener with a rear end 701 and a relative to the guide channel 700 in the direction of the set axis slidably disposed holder 650 for holding a delay element, not shown. The holder 650 has a bolt receptacle 680 with a Zuführausnehmung 704 through which a nail strip 705 with a plurality of fasteners 706 a firing portion 702 of the guide channel 700 can be fed. The guide channel 700 also serves as Anpressfühler a pressing device, which has a connecting rod 770, which is also displaced upon a displacement of the guide channel 700 and thus indicates a pressing of the device to a substrate.

Fig. 31 shows the nose 690 in a further oblique view. The guide channel 700 is part of a pressing device for detecting the distance of the driving device to the ground in the direction of a set axis S. The nose 690 further comprises a locking element 710, which allows a displacement of the guide channel 700 in a release position and in a blocking position, a displacement of the guide channel 700 prevented. The blocking element 710 is of a concealed in the drawing engagement spring in one direction loaded on the nail strip 705. As long as no fastener is disposed in the firing section 702 in the guide channel 700, the blocking element 710 is in the blocking position in which it blocks the guide channel 700, as in FIG Fig. 31 shown.

Fig. 32 shows the nose 690 in a further oblique view. Once a fastener is disposed in the launch section 702 in the guide channel 700, the locking member 710 is in a release position where it passes the guide channel 700, as in FIG Fig. 32 shown. As a result, the driving-in device can be pressed against the ground. In this case, the connecting rod 770 is shifted, so that the pressing can ensure the initiation of a driving operation.

Fig. 33 shows the nose 690 in a cross section. The guide channel 700 has a launch section 702. The blocking element 710 has, adjacent to the launching section, a locking shoulder 712 which can be acted on by the nail strip 705 or individual nails.

Fig. 34 shows the nose 690 in a further cross section. The blocking element 710 is in the release position, so that the blocking element 710 allows the guide channel 700 to pass in the direction of the setting axis S when moving.

Fig. 35 shows a driving-in device 10 with the nose 690 in a partial view. The nose 690 further comprises an externally operable by a user Entsperrelement 720, which holds the locking member 710 in its release position in an unlocked position and in a waiting position allows movement of the locking element in its blocking position. On the side facing away from the viewer side of the unlocking element 720 is a release spring, not shown, which acts on the unlocking element 720 of the blocking element 710 away. Furthermore, the unlocking switch 730 is shown.

Fig. 36 shows the driving-in device 10 with the nose 690 in a further partial view. A running as a magazine 40 feeding device for fastening elements to the launching section has a feed spring 735 and a feed element 740. The feed spring 735 loads the feed element 740 and thus also optionally located in the magazine fasteners on the guide channel 700. The unlocking element 720 has a first extension 721 of the unlocking element 720 Locking element 746 and the feed element 740 has a second locking element 747. The first and the second latching element lock together when the unlocking 720 is moved to the unlocked position. In this state, individual fasteners along the set axis S in the guide channel 700 can be introduced. As soon as the magazine 40 is reloaded, the locking between the unlocking element 720 and the advancing element 740 is released and the driving-in device can continue to be used as usual.

Fig. 37 1 shows a schematic view of a driving-in device 10. The driving-in device 10 comprises a housing 20, in which a piston 100, a coupling device 150 held closed by a holding element designed as a pawl 800, a spring 200 with a front spring element 210 and a rear spring element 220 Role train 260 with a trained as a band 270 force deflector, a front roller holder 281 and a rear roller holder 282, a spindle drive 300 with a spindle 310 and a spindle nut 320, a gear 400, a motor 480 and a control device 500 are added.

The driving-in device 10 furthermore has a guide channel 700 for the fastening element and a pressing device 750. In addition, the housing 20 has a handle 30 on which a manual switch 35 is arranged.

The control device 500 communicates with the manual switch 35 as well as with a plurality of sensors 990, 992, 994, 996, 998 in order to detect the operating state of the driving-in device 10. The 990, 992, 994, 996, 998 each have a Hall probe, which detects the movement of a magnet armature, not shown, which is arranged on the respectively to be detected element, in particular fixed.

With the guide channel sensor 990, a movement of the pressing device 750 is detected forward, thereby indicating that the guide channel 700 has been removed from the driving-in device 10. With the Anpresssensor 992 a movement of the pressing device 750 is detected to the rear, thereby indicating that the driving device 10 is pressed against a substrate. With the roller holder sensor, a movement of the front roller holder 281 is detected, indicating whether the spring 200 is tensioned. With the pawl sensor 996, a movement of the pawl 800 is detected, thereby indicating whether the clutch device 150 in its closed Condition is maintained. Finally, it is detected with the spindle sensor 998 whether the spindle nut 320 or a return rod fastened to the spindle nut 320 is in its rearmost position.

Fig. 38 shows a control structure of the drive-in simplified. By a central rectangle, the control device 1024 is indicated. The switching and / or sensor devices 1031 to 1033 provide, as indicated by arrows, information or signals to the control device 1024. A manual or main switch 1070 of the driving device is in communication with the control device 1024. By a double arrow is indicated that the controller 1024 communicates with the battery 1025. By further arrows and a rectangle is a latching 1071 indicated.

In one embodiment, the handset detects a hold by the user and the controller responds to release of the switch by depleting the stored energy. Thus, security is increased in case of unexpected errors such as dropping the bolt gun.

By further arrows and rectangles 1072 and 1073, a voltage measurement and a current measurement are indicated. By a further rectangle 1074 a shutdown is indicated. By another rectangle, a B6 bridge 1075 is indicated. This is a 6-pulse bridge circuit with semiconductor elements for controlling the electric drive motor 1020. This is preferably driven by driver blocks which in turn are preferably controlled by a controller. Such integrated driver components have, in addition to the appropriate driving the bridge weiters still the advantage that they bring the switching elements of the B6 bridge in a defined state when undervoltage occurs.

By a further rectangle 1076, a temperature sensor is indicated, which communicates with the shutdown 1074 and the controller 1024. A further arrow indicates that the control device 1024 outputs information to the display 1051. By further double arrows it is indicated that the control device 1024 communicates with the interface 1052 and with another service interface 1077.

Preferably, in order to protect the control and / or the drive motor in addition to the switches of the B6 bridge, another switching element is used in series, which separates the power flow from the battery to the consumers by operating data such as overcurrent and / or excess temperature by the shutdown 1074.

For an improved and stable operation of the B6 bridge, the use of memories such as capacitors makes sense. Thus, when connecting battery and control no current peaks caused by the rapid charge of such memory components, which would lead to increased wear of the electrical contacts, these memory are preferably placed between the other switching element and the B6 bridge and after the battery supply via suitable wiring of the other switching element controlled supplies with charge.

By additional rectangles 1078 and 1079, a fan and a parking brake are indicated, which are controlled by the control device 1024. The fan 1078 serves to circulate components in the drive-in device for cooling with cooling air. The parking brake 1079 is used to slow down movements when relaxing the energy storage 1010 and / or to keep the energy storage in the charged or charged state. The parking brake 1079 may, for example, cooperate with the belt drive 1018 for this purpose.

Fig. 39 shows the control sequence of a driving device in the form of a state diagram in which each circuit represents a device state or operating mode and each arrow represents a process by which the driving device passes from a first to a second device state or operating mode.

In the device state "battery removed" 900 is taken from an electrical energy storage such as a battery from the driving device. By inserting an electrical energy store in the drive-in device, the drive-in device is switched to the "off" device state 910. In the device state "off" 910, although an electrical energy store is inserted into the drive-in device, the drive-in device is still switched off. By switching on with the manual switch 35 off Fig. 37 the device mode "Reset" 920 is reached, in which the control electronics of the driving device is initialized. After a self-test, the driving device finally goes into the Operating mode "clamping" 930, in which a mechanical energy storage of the driving device is tensioned.

If the drive-in device is switched off in operation mode "tensioning" 930 with the manual switch 35, the drive-in device still reaches the device state "off" 910 while the drive-in device is still unrestrained. With a partially tensioned drive-in device, the drive-in device, however, enters the operating mode "release" 950, in which the mechanical energy storage of the driving device is relaxed. If, on the other hand, a previously determined tensioning travel is achieved in the operating mode "tensioning" 930, the driving-in device reaches the device state "ready for action" 940. The reaching of the tensioning travel is achieved with the aid of the roller-holding sensor 994 in FIG Fig. 37 detected.

Starting from the "ready to use" device state 940, the drive-in device enters the operating mode by turning off the manual switch 35 or by determining that more than a predetermined time has elapsed since the device ready state 940 has been reached, for example, more than 60 seconds "Relax" 950. However, if the drive-in device is pressed against a substrate in good time, the drive-in device changes to the device state "ready to start" 960, in which the drive-in device is ready for a drive-in procedure. The pressing is done with the help of Anpresssensors 992 Fig. 37 detected.

Based on the device state "ready to start" 960, the drive-in device enters the operating mode by switching off the manual switch 35 or by determining that more than a predetermined time has elapsed since reaching the device state "ready to start" 960, for example more than six seconds "Relax" 950 and then into the "off" device state 910. On the other hand, if the drive-in device is turned on again by operating the manual switch 35 while in the "relax" mode of operation 950, it passes from the "relax" mode 950 directly to the drive Operating mode "Clamping" 930. Based on the operating mode "Ready to start" 960, the drive-in device is lifted from the substrate by lifting the drive-in device back into the device state "ready for use" 950. The lift-off is thereby detected with the aid of the contact pressure sensor 992.

Starting from the "ready to start" operating mode 960, the drive-in device enters the operating mode "drive-in" 970 by pulling the trigger in which a Fastening element driven into the ground and the energy transfer element is moved to the starting position and engaged in the coupling device. Pulling the trigger causes the clutch device 150 to open Fig. 37 by pivoting the associated pawl 800, which is detected by means of the pawl sensor 996. From the operating mode "driving in" 970, the driving-in device, as soon as the driving-in device is lifted off the ground, enters the operating mode "clamping" 930. In this case, lifting is again detected with the aid of the pressing-on sensor 992.

Fig. 40 FIG. 12 shows a more detailed state diagram of the relax mode 950. In the relax mode 950, the motor stop mode 952 is initially run through which any rotation of the motor is stopped. The "stop engine" operating mode 952 is reached from any other operating mode or device state when the device is turned off with the manual switch 35. After a predetermined period of time thereafter, the operating mode "engine brake" 954 is run through, in which the engine is short-circuited and working as a generator, the deceleration process brakes. After a further predetermined period of time, the operating mode "motor drive" 956 is run through, in which the motor further actively brakes the decompression process and / or brings the linear drive into a predefined end position. Finally, the device state "relax ready" 958 is reached.

Fig. 41 FIG. 12 shows a more detailed state diagram of the drive mode 970. In the drive mode 970, first the operate mode "wait for drive" 971, then after the piston has reached its set position, the operating mode "fast engine run and hold open" 972, then the operating mode "slow engine run" 973, then the "stop engine" operating mode 974, then the operating mode "engage piston" 975 and finally the operating mode "engine off and wait for nail" 976. The achievement of the clutch by the piston is characterized by a spindle sensor 998 Fig. 37 recognized. Finally, the drive-in device passes from there into the device state "Off" 910 by determining that more than a predetermined time has elapsed since the operating mode "engine off and waiting for nail" 976 has elapsed, for example more than 60 seconds.

Fig. 42 FIG. 12 shows a more detailed state diagram of the "clamp" operating mode 930. In the "clamp" operating mode 930, the "initialization" operating mode first becomes 932 pass, in which the control means by means of the spindle sensor 998 checks whether the linear actuator is in its rearmost position or not, and with the aid of the pawl sensor 996 checks whether the holding element keeps the coupling device closed or not. If the linear drive is in its rearmost position and the holding element keeps the clutch device closed, the device immediately goes into operating mode "tensioning mechanical energy storage" 934, in which the mechanical energy store is tensioned, since it is ensured that the energy transmission element is engaged in the clutch device is.

If in operation mode "initialization" 932 it is determined that the linear drive is in its rearmost position, but the holding element does not keep the clutch closed, first the operation mode "advance linear drive" 938 and after a predetermined period of time the operating mode "drive back linear drive" 936 are run through such that the linear output carries and engages the energy transfer element rearwardly to the clutch. As soon as the control device determines that the linear drive is in its rearmost position and the retaining element holds the coupling device closed, the device moves into the operating mode "tensioning mechanical energy storage" 934.

If it is detected in operating mode "Initialization" 932 that the linear actuator is not in its rearmost position, the operating mode "Retracting the linear output" 936 is immediately run through. As soon as the control device determines, with the aid of the spindle sensor 998, that the linear drive is in its rearmost position and the retaining element holds the coupling device closed, the device again enters the operating mode "tensioning mechanical energy storage" 934.

Fig. 43 shows a longitudinal section of the driving-in device 10, after using the piston 100, a fastener to the front, that is, in the drawing to the left, was driven into a ground. The piston is in its setting position. The front spring element 210 and the rear spring element 220 are in the relaxed state, in which they still have some residual stress. The front roller holder 281 is in its forwardmost position in operation and the rear roller holder 282 is in its rearmost position in operation. The spindle nut 320 is located at the front end of the spindle 310. Due to the possibly relaxed to a residual stress spring elements 210, 220, the band 270 is substantially free of load.

Once the controller 500 has detected by means of a sensor that the piston 100 is in its set position, the controller 500 causes a return operation in which the piston 100 is conveyed to its original position. For this purpose, the motor rotates via the gear 400, the spindle 310 in a first rotational direction, so that the rotationally secured spindle nut 320 is moved to the rear.

The return rods engage in the Rückholzapfen of the piston 100 and thus promote the piston 100 also to the rear. The piston 100 takes along the tape 270, whereby the spring elements 210, 220 are not tensioned, since the spindle nut 320 also takes the tape 270 backwards and releases about the rear rollers 292 as much tape length as the piston between the front rollers 291 moves. The tape 270 thus remains substantially free of load during the return operation.

Fig. 44 shows a longitudinal section of the driving-in device 10 after the return operation. The piston 100 is in its starting position and is engaged with its coupling plug 110 in the coupling device 150. The front spring member 210 and the rear spring member 220 are still in their respective relaxed state, the front roll holder 281 is in its forwardmost position and the rear roll holder 282 is in its rearmost position. The spindle nut 320 is located at the rear end of the spindle 310. Due to the relaxed spring elements 210, 220, the band 270 is still substantially free of load.

If the driving-in device is now lifted off the ground, so that the pressing device 750 is displaced forward relative to the guide channel 700, the control device 500 causes a tensioning process in which the spring elements 210, 220 are tensioned. For this purpose, the motor rotates via the gear 400, the spindle 310 in a direction opposite to the first direction of rotation second rotational direction, so that the rotationally secured spindle nut 320 is moved forward.

The coupling device 150 holds the coupling male part 110 of the piston 100 fixed, so that the length of the strip, which is drawn in by the spindle nut 320 between the rear rollers 292, can not be released from the piston. The roller holders 281, 282 are therefore moved towards each other and the spring elements 210, 220 are tensioned.

Fig. 45 shows a longitudinal section of the driving device 10 after the clamping operation. The piston 100 is still in its initial position and is engaged with its coupling plug 110 in the coupling device 150. The front spring member 210 and the rear spring member 220 are cocked, the front roller holder 281 is in its rearmost position, and the rear roller holder 282 is in its foremost position. The spindle nut 320 is located at the front end of the spindle 310. The band 270 deflects the clamping force of the spring elements 210, 220 on the rollers 291, 292 and transmits the clamping force to the piston 100, which is held against the clamping force of the coupling device 150.

The drive-in device is now ready for a drive-in process. As soon as a user pulls the trigger 34, the coupling device 150 releases the piston 100, which then transfers the clamping energy of the spring elements 210, 220 to a fastening element and drives the fastening element into the ground.

Claims (15)

1. Device (10) for driving a fastening element into a substrate, comprising an energy-transfer element movable between a starting position and a setting position for transferring energy to the fastening element and a drive mechanism (70) for transporting the energy-transfer element from the starting position to the setting position and back again, wherein the drive mechanism (70) includes a motion converter (300) for converting a rotary motion into a linear motion with a rotary drive (310) and a linear output (320), a motor (480) with a motor output (490) and a torque-transfer mechanism (400) for transferring a torque from the motor output (490) to the rotary drive (310), wherein the torque-transfer mechanism (400) comprises a motor-side rotary element (410) with a first axis of rotation (390) and a motion converter-side rotary element with a second axis of rotation offset from and parallel to the first axis of rotation, wherein rotation of the motor-side rotary element (410) about the first axis directly causes rotation of the motion converter-side rotary element, characterised in that the motor-side rotary element (410) is arranged in such a manner that it cannot be displaced relative to the motor output (490) and can be displaced along the first axis of rotation (390) relative to the motion converter-side rotary element.
2. Device according to claim 1, wherein the motor-side rotary element (410) is arranged in such a manner that it is fixed in rotation relative to the motor output (490).
3. Device according to one of the preceding claims, wherein the motor-side rotary element (410) comprises motor-side toothing and the motion converter-side rotary element comprises drive element-side toothing and wherein, in particular, the motor-side toothing and/or the drive element-side toothing extend(s) in the direction of the first axis of rotation (390).
4. Device according to one of the preceding claims, wherein the drive mechanism (70) includes a motor-damping element (460) suitable for absorbing kinetic energy, in particular vibration energy, of the motor (480) relative to the motion converter (300).
5. Device according to one of the preceding claims, wherein the motor-damping element (460) is arranged on the motor (480), in particular, in an annular manner around the motor (480).
6. Device according to one of the preceding claims, wherein the drive mechanism (70) includes a retaining mechanism (450) suitable for fixing the motor output (490) in rotation.
7. Device according to one of the preceding claims, wherein the motor-damping element (460) is arranged on the retaining mechanism (450), in particular, in an annular manner around the retaining mechanism (450).
8. Device according to one of the preceding claims, wherein the motor-damping element (460) is fastened to the motor (480) and/or to the retaining mechanism (450), in particular, by a material bond.
9. Device according to one of the preceding claims, further comprising a housing (20) in which the energy-transfer element and the drive mechanism (70) with the motion converter (300), the motor (480) and the torque-transfer mechanism (400) are accommodated, wherein, in particular, the motor-damping element (460) is arranged on the housing (20).
10. Device according to one of the preceding claims, wherein the housing (20) comprises an, in particular, annular mounting element (470) on which the motor-damping element (460) is arranged, in particular, fastened thereto.
11. Device according to one of the preceding claims, wherein the motor-damping element (460) seals the motor (480) and/or the retaining mechanism (450) with respect to the housing (20).
12. Device according to one of the preceding claims, further comprising a first electric line for supplying the motor (480) with electric energy, wherein the first electric line is electrically connected to the motor (480) and wherein the motor (480) includes a motor-side tension-relief element (494) by means of which the supply line is fastened to the motor (480) at a distance from the electrical connection.
13. Device according to one of the preceding claims, further comprising a first electric line for supplying the motor (480) with electric energy, wherein the first electric line is electrically connected to the motor (480) and wherein the housing (20) includes a housing-side tension-relief element by means of which the supply line is fastened to the housing.
14. Device according to one of the preceding claims, wherein the housing (20) comprises a motor guide for guiding the motor (480) in the direction of the first axis of rotation (390).
15. Device according to one of the preceding claims, wherein the drive mechanism (70) includes a mechanical energy storage mechanism (200) for storing mechanical energy, wherein the energy-transfer element is provided for transferring energy from the mechanical energy storage mechanism (200) to the fastening element.

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