WO2020259870A1 - Handgeführtes setzgerät - Google Patents
Handgeführtes setzgerät Download PDFInfo
- Publication number
- WO2020259870A1 WO2020259870A1 PCT/EP2020/053023 EP2020053023W WO2020259870A1 WO 2020259870 A1 WO2020259870 A1 WO 2020259870A1 EP 2020053023 W EP2020053023 W EP 2020053023W WO 2020259870 A1 WO2020259870 A1 WO 2020259870A1
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- WO
- WIPO (PCT)
- Prior art keywords
- piston
- drive
- setting tool
- actuator
- hand
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25C—HAND-HELD NAILING OR STAPLING TOOLS; MANUALLY OPERATED PORTABLE STAPLING TOOLS
- B25C1/00—Hand-held nailing tools; Nail feeding devices
- B25C1/04—Hand-held nailing tools; Nail feeding devices operated by fluid pressure, e.g. by air pressure
- B25C1/047—Mechanical details
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25C—HAND-HELD NAILING OR STAPLING TOOLS; MANUALLY OPERATED PORTABLE STAPLING TOOLS
- B25C1/00—Hand-held nailing tools; Nail feeding devices
- B25C1/06—Hand-held nailing tools; Nail feeding devices operated by electric power
Definitions
- the present invention relates to hand-held setting tools for setting a nail or a bolt.
- Setting devices or nailing devices which store the energy required for the setting process in a pre-tensioned gas spring, are generally known from WO 2009/046076 A1, for example, and are marketed by Senco under the trade name “Fusion TECH” Devices are also offered by HITACHI and should achieve driving energies of 120J.
- Such nailers are well suited for setting nails in wood, but have various disadvantages compared to internal combustion-powered setting devices, which severely limit their range of applications.
- gas spring setting tools appear to be unsuitable for driving bolts into solid surfaces such as steel or concrete, on the one hand because of the insufficient driving energy and on the other hand because of the possible kickback.
- the problem of kickback also exists for setting tools with electrodynamic drives.
- gas spring setting devices Another disadvantage of known gas spring setting devices can be seen in the fact that the drive-in energy is difficult to set, whereas this is easier, for example, in the case of devices powered by internal combustion Way is possible.
- the injected fuel quantity can be varied in a setting device driven by the combustion of an ignitable gas-air mixture.
- cartridges can be loaded with a propellant charge adapted to the application.
- the present invention aims to solve the above-mentioned problems.
- FIG. 1 shows a hand-held setting tool according to one embodiment.
- FIG 2 shows an actuator according to an embodiment.
- FIG 3 shows an actuator according to an embodiment.
- 4a-4c show an embodiment of a tensioning device.
- FIG. 5 shows an actuator according to an embodiment.
- Fig. 6 shows a hand-held setting tool according to a
- Fig. 7 shows a hand-held setting tool according to a
- a hand-operated setting device for setting a nail or a bolt in a substrate comprises a drive or a piston drive, preferably a gas spring drive or an electrodynamic drive, which drives an actuator 11.
- the driven actuator 11 is used to drive the nail or the bolt into the ground.
- the hand-held setting tool further comprises a decoupling device, which a first movement process of a first movable part or piston III in the actuator 11, driven by the drive, by a second movement process of a second movable part or piston II2 in the actuator 11 for driving the nail or the Bolt at least partially or partially decoupled.
- the reference numbers here refer only by way of example to features in FIG. 1, which shows a setting device with a gas spring drive.
- the concept of the decoupling device can, however, also be used for other drives, in particular electrodynamic drives).
- the decoupling device can advantageously be designed so that kinetic or translational energy (caused by the drive) of the first movable part or piston III is transferred to the second movable part or piston II2 and kinetic or translational energy of the second movable part or piston II2 for driving nail or bolt is used.
- the drive thus serves to drive an actuator 11, in other words a stroke control element, which in the present case can be designed as a pneumatic actuator.
- the decoupling device decouples a movement process of the first movable part (e.g. an armature) or the first movable piston III, which is caused by the drive (e.g. a translational movement of the movable part / piston in a cylinder) from a movement process of the second movable part (eg a setting element) or of the second movable piston II2 (eg a setting piston).
- the drive e.g. a translational movement of the movable part / piston in a cylinder
- the partial or partial decoupling of the movement processes can e.g. can be achieved in that a translational movement of the first piston does not lead directly or synchronously or simultaneously to a translational movement of the second piston, and vice versa.
- the movement process of the first piston preferably leads to a movement of the second piston only after a certain time delay. A (direct) kickback is therefore not transmitted directly to the first piston and thus to the drive.
- the decoupling device can be designed in that the first movable part or the first movable piston III is not rigidly connected to the second movable part or the second movable piston II2 or there is no direct contact between them.
- first movable part or the first movable piston III is not rigidly connected to the second movable part or the second movable piston II2 or there is no direct contact between them.
- the decoupling device can be designed in that a compressible fluid, for example a compressible fluid, is located between the first movable part or piston III and the second movable part or piston II2. Air is located.
- a compressible fluid can at least partially decouple the movement processes of the first and second pistons.
- a stroke length ("stroke length", distance between a first and second dead center) of the first movable part or piston III is therefore advantageous independent of a stroke length of the second movable part or piston II2. This allows the setting energy of the drive to be independent of a setting stroke of the second movable part or piston II2 can be adjusted.
- the actuator 11 can furthermore have a cylinder, the first piston III and the second piston II2 being arranged opposite one another in the cylinder and with at least one piston seal being formed in the cylinder.
- the piston seals can be one or more piston rings and / or a gas dynamic seal.
- the gas dynamic seal is preferably of the type of a labyrinth piston seal (as will be explained in more detail below).
- the actuator 11 can furthermore be designed in such a way that a restoring device (eg a spiral compression spring) is designed for the second movable part or the second movable piston II2. After the nail or bolt has been set, the second movable part or the second movable piston can thus be returned to an initial position, largely independently of the first movable part or the first movable piston of the actuator 11.
- a restoring device eg a spiral compression spring
- the drive can have a further actuator 10.
- the actuator 10 is e.g. Part of a gas spring (as will be explained further below) and is coupled to the first movable part or piston 11, so that the driven further actuator 10 leads to the first movement process in the actuator 11.
- the setting stroke of the second movable part or piston II2 in the actuator 11 is independent of a travel of the further actuator 10, so that the setting energy can be set independently of the setting stroke with which the nail or bolt is driven.
- Fig. 1 shows schematically the structure of a setting tool according to a further embodiment. Its function is initially explained using the following components and / or assemblies:
- the hand-held setting tool shown in FIG. 1 is a setting tool with a gas spring drive which, in a further advantageous embodiment, has at least one working gas reservoir 20 with a working gas and wherein the actuator 10 is a pneumatic actuator.
- the pneumatic actuator 10 has a third piston 10 i which is connected to a piston rod 01.
- the third piston 10i is in fluid connection with the working gas reservoir 20 and, together with the working gas reservoir 20, forms a gas spring.
- the pneumatic actuator 10 can be moved between a stroke start position area in which the gas spring is stretched to the maximum and a stroke end position area in which the gas spring is at least partially relaxed.
- this driven movement of the pneumatic actuator 10 leads to a movement of the movable part or piston III in the actuator 11 (first movement process), but this movement is at least dependent on the movement of the second movable part or piston II2 (second movement process) is partially decoupled.
- the pneumatic actuator 10 (first actuator), together with the working gas reservoir 20, forms a pretensioned gas spring and thus the gas spring drive.
- the motor 70 is supplied with electrical power from the energy store 90 (for example an accumulator or a fuel cell) by means of the motor control 80.
- Motor 70 drives reduction gear 60.
- Reduction gear 60 drives jig 50.
- Clamping device 50 translates the rotary movement of reduction gear 60 into a translational one, acts on piston rod 01 of pneumatic actuator 10, and moves its piston to deliver working gas from pneumatic actuator 10 to working gas reservoir 20, i.e. to tension the gas spring.
- Lock 40 can lock the gas spring in the tensioned state.
- the lock 40 is unlocked, for example with the aid of an electromagnetic actuator 41. That volume which is displaced by the piston of the pneumatic actuator 10 when the gas spring is tensioned is referred to as the stroke volume. Further optional components of a setting tool according to FIG. 1 are explained below:
- Reference numeral 30 represents a valve which can connect the working gas reservoir 20 and the pneumatic actuator 10 to one another. It can, for example, like to use a fast electromagnetic actuator 31.
- DE 10 2009 031 665 A1 plus a spring are positively controlled to pass a gas pulse from the working gas reservoir 20 into the actuator 10 and close it again before the setting process is completed, the valve preferably opening automatically when the pressure in the actuator's displacement 10 exceeds a certain value which is greater than the pressure in the working gas reservoir 20.
- the kickback of the device when setting it in solid ground can be reduced and the setting energy can be varied by the user by selecting the opening time of the valve; However, this at the expense of the electrical efficiency of the device.
- Valve 30 can preferably also be formed by the piston of actuator 10, which then serves as a shut-off body or has such a piston, the cylinder of actuator 10 being designed to have a valve seat, with the sealing being carried out with the aid of force from lock 40, which is used to generate force, for example can have a spring or be resilient (this variant will be explained later with reference to FIG. 2).
- Reference numeral 120 represents a thermocouple with which the temperature in working gas reservoir 20 can be measured.
- Reference numeral 100 represents a manometer, in particular an electrical or electronic one, with which the static pressure in the working gas reservoir 20 can be measured.
- Reference number 21 represents a second working gas reservoir, which is normally under excess pressure compared to the working gas reservoir 20, the static pressure of which can be measured, for example, by means of a manometer 101.
- Working gas reservoir 21 serves the purpose of compensating for any leakage losses in working gas reservoir 20. This can take place via a pressure reducing valve 32.
- the working gas can be heated or cooled in the working gas reservoir 20, for example by means of a Peltier element 110 (instead of which, for example, a heat pump can also be used), which with the cooling or heating elements 111 and 112 also creates a thermal connection between the working gas in Working gas reservoir 20 and the environment creates.
- Reference numeral 130 also shows a valve via which working gas reservoir 21 - the "refill reservoir" - can be filled externally with working gas.
- the piston of the actuator 10 with the piston rod 01 does not itself (directly) act on the nail or bolt 140 in order to drive it in. Rather, actuator 10 acts with its piston rod 01 on a hammer mechanism, with kinetic energy (including parts mechanically connected to it) from actuator 10 from the first piston (e.g. piston III in FIG. 1) to a moving part, e.g. a second piston (e.g. piston II2 in Fig. 1), and the nail or bolt 140 is driven entirely or predominantly with the aid of the kinetic energy of the movable part, the first piston III and the movable part or second piston II2 not being rigidly connected to one another ("Decoupling Device").
- a first piston III is driven in a further pneumatic actuator 11 ("hammer mechanism", second actuator), which can for example be filled with air (ambient pressure)
- a second piston II2 is driven in addition to the first piston III.
- the first piston III can, as explained, be driven by actuator 10 and is, for example, single-acting.
- the second piston II2 from actuator 11 - by means of a decoupling device from the first Piston III at least partially decoupled - is preferably double-acting and equipped with a restoring device, shown here in the form of a spiral compression spring, for example.
- the first and second pistons of actuator 11 can be designed in the manner of the pistons of labyrinth piston compressors be, the required - temporary - sealing can thus be achieved gas-dynamically.
- the piston rod 01 and consequently the piston of actuator 10 and the first piston 11 connected to piston rod 01 of actuator 11 can be accelerated by loosening the lock 40 by means of the pretensioned gas spring.
- the pressure between the first and second pistons of actuator 11 rises almost exponentially: the gas buffer that forms between the first and second pistons of actuator 11 generates momentum and kinetic energy from the part of the setting device that is directly driven by gas springs (piston 10i of actuator 10, piston rod 01, first piston III of actuator 11) is transferred to the second piston II2 of actuator 11 and consequently also to its piston rod and parts connected to it (for example the return spring).
- the movable masses must be expertly matched to one another, taking into account any reduced masses.
- the nail or bolt 140 is thus ultimately set via the piston rod of the second piston II2 of actuator 11. If this second piston II2 of actuator 11 is double-acting, that is, the side of the cylinder of actuator 11 facing the nail is closed sufficiently tightly On the side of the second piston II2 facing the nail, a second fluid or gas cushion resetting the second piston can be built up during a setting process in the cylinder of actuator 11 (as shown in FIG. 1). This prevents the second piston II2 of the actuator 11 from striking the nail or bolt 140 hard.
- the driving energy mainly comes from the kinetic energy of the second piston of actuator 11 (including its piston rod, etc.).
- the energy transfer from the first to the second piston of actuator 11 should be as abrupt as possible, which can be achieved in at least two practical ways: ( i) First, one or more ventilation openings can be arranged in the cylinder so that the first piston can start moving and convey gas or air through this opening (s), for example into the device housing, so that initially the movement of the first piston is not blocked leads to a significant pressure increase in the space between the first and the second piston.
- the second piston II2 of the actuator 11 can be blocked with the help of a mechanism so that it can only start moving after a certain breakaway force has been exceeded.
- Corresponding mechanisms can function positively or non-positively and are known, for example, from so-called force limiters and from the locks of guns. Both variants can be combined with each other.
- the setting stroke and the travel by which the gas spring (formed by the actuator 10 and the working gas reservoir 20) is tensioned are largely independent of one another. This simplifies the provision of variable setting energies: only the travel by which the gas spring is tensioned, and thus the stroke volume, have to be set accordingly. This does not change the setting stroke, which is determined by the actuator 11. Further aspects of embodiments with regard to structural features of components of setting devices according to the invention are explained below.
- FIG. 2 shows a possible further embodiment of a pneumatic actuator 10 (first actuator) from FIG. 1 for the gas spring.
- the third piston 10a comprises a plurality of piston rings 15a, with cavities 16a being arranged axially, that is to say along the direction of movement of the third piston 10a, between the piston rings 15a or the piston being designed to have such, the cavities 16a are preferably partially, but not completely, filled with an incompressible fluid.
- piston 10a with piston rod 11a is arranged in cylinder 12a.
- Cylinder 12a is designed to have a valve seat 13a towards the high pressure side p1, that is towards the working gas reservoir.
- Piston 10a is designed as an associated shut-off body. If the clamping device 40 from Fig. 1, preferably by a spring, can exert a sufficient contact pressure on the piston 10a in the locked state, the working gas reservoir is additionally in the locked, cocked (ready-to-fire) state through the valve (formed from piston and cylinder as described) sealed. The role of the valve here corresponds to that of valve 30 from FIG. 1.
- Piston rod 11a from FIG. 2 is identical to piston rod 01 from FIG. 1.
- piston 10a has, for example, two piston guide rings 14a.
- piston 10a also has several piston rings 15a, the contact pressure of which can be applied, for example, by O-rings, but also in all other known ways.
- piston rings 15a are shown, but more or fewer piston rings 15a can be provided.
- the piston 10a is located between the piston rings 15a further designed to have a plurality of cavities or cavities 16a. These cavities are preferably partially, but not completely, filled with a liquid lubricant.
- the multiple cavities in the form of a cascade i.e. cavities in a row, so that the effect of each cavity is derived from a previous cavity and acts on a subsequent cavity
- the contact pressure per seal can be reduced accordingly and consequently the p * v stress on each individual seal can be reduced accordingly.
- the valve formed by cylinder 12a and piston 10a is closed. In this position, therefore, working gas in order to escape from the working gas reservoir at pressure pl to the low-pressure side pO must first overcome the valve and then the complete cascade of lubricated piston rings and cavities.
- the leakage from the cascaded, "buffered” and lubricated piston rings (mechanical seals) is determined only during an adjustment process up to the subsequent, complete return of piston 10a to its stroke start position.
- a sufficiently tough, hard, particularly wear-resistant and highly polishable steel is proposed as the material for the piston 10a and cylinder 12a.
- Steels such as 1.4108, i.e. cold work steels and, in particular, pressure-stitched steels with a very fine martensitic structure, further characterized by the absence of coarse-grained carbides or carbonitrides, are particularly suitable, whereby under "coarse-grained" a maximum expansion along a direction of more than 20pm and even with cellular precipitated carbides preferably more than 10pm.
- newer materials that can be processed with the means of so-called additive manufacturing are particularly suitable for pistons and / or cylinders.
- additive manufacturing e.g. laser sintering
- very hard powder-metallurgical steels of sufficient toughness e.g. Vibenite 290
- metallic glasses based on elements of the 4th subgroup are particularly suitable for pistons and / or cylinders.
- Piston 10a and the running surface of cylinder 12a can, with great preference, be coated with hard material layers or tribological layers.
- CVD-deposited, predominantly tetrahedrally coordinated carbon (ta-C) is particularly suitable for coating cylinder 12a or its running surface.
- Ta-C is also suitable as a coating for the piston 10a, but also aC / WC, TiN, TiMoN (as a solid phase solution or MoN / TiN “superlattice”), TiN-MoS2, and the nitrides, carbides and carbonitrides of Cr, Ti , Zr, Hf and also aluminum oxide (and / or aluminum oxynitride) in amorphous form or as nano- or microcrystalline corundum.
- the running surface v on cylinder 12a to have a low coefficient of sliding friction, if possible not to enter into any noticeable adhesion with that, even to have a relatively high thermal conductivity and a low coefficient of thermal expansion.
- Materials based on carbon are particularly suitable, for example graphite impregnated with antimony.
- FIG. 2 A professional implementation of an actuator 10 (from Fig. 1) like.
- Fig. 2 allows with outstandingly high pressures (for example at least 10 bar, more preferably at least 20 bar, more preferably at least 40 bar, more preferably at least 60 bar, more preferably at least 80 bar, more preferably at least 100 bar, and more preferably at least 120 bar) and piston speeds (for example at least 30 m / s, preferably more than 50 m / s) without compromising the tightness of working gas reservoir 20 (from FIG. 1).
- pressures for example at least 10 bar, more preferably at least 20 bar, more preferably at least 40 bar, more preferably at least 60 bar, more preferably at least 80 bar, more preferably at least 100 bar, and more preferably at least 120 bar
- piston speeds for example at least 30 m / s, preferably more than 50 m / s
- FIG. 3 shows a further possible embodiment of a pneumatic actuator 10 (first actuator) from FIG. 1.
- the pneumatic actuator 10 comprises, in addition to the third piston 10b, a fourth piston 11b, a reservoir 13b being formed between the third piston 10b and the fourth piston 11b, which is filled with an incompressible fluid, which is preferably the one below Has executed properties and is matched to the working gas as explained below.
- FIG. 3 thus shows a completely different and novel possibility of realizing the seal of a gas spring.
- the piston 10i connected or even identical to the piston rod 01 of the actuator 10 (from FIG. 1) is provided in FIG. 3 with the reference symbol 11b.
- the two pistons 10b and 11b are not rigidly connected to one another.
- 12b represents the cylinder of the pneumatic actuator (first actuator 10).
- a reservoir 13b which is arranged in cylinder 12b between the two pistons and is filled with a fluid (incompressible fluid).
- This is preferably a liquid lubricant in which polymers or oligomers are dissolved and / or solid Lubricants such as MoS2 and / or hBN and / or graphite are dispersed, possibly with the addition of stabilizers, so that the fluid has pronounced shear thinning properties and possibly also shows thixotropic properties (a thixotropy of the fluid in reservoir 13b can cause locking 40 during unlocking mechanically relieve).
- Reference number 16b refers to a sealing ring, for example a so-called armored carbon ring. The same applies to the selection of materials with regard to the piston and the cylinder, also with regard to any coatings, as stated above for FIG. 2.
- this seal is not a decoupling device (as explained above), because the pistons 10b and 11b are not decoupled via the incompressible fluid, but move synchronously with one another. A movement of the piston 10b leads directly to a movement of the piston 11b and vice versa.
- FIGS. 4a-c show a possible embodiment of the clamping device, symbolized by 50 in FIG. 1, which moves the piston 10 (FIG. 1).
- 10c denotes the piston rod 01 from Fig. 1, 11c a lifting member of the piston rod, 20c and 30c two toothed wheels with freewheeling devices located thereon from the components 21-23c and 31-33c (designations in Fig. 4b and 4c analogously with additions d and e).
- the gearwheels can be set in rotation by an electric motor marked 70 in FIG. 1 via a reduction gear 60, it being sufficient to drive one of the two interlocking gearwheels.
- Particularly suitable as the gear 60 is an epicyclic gear, preferably designed with multiple stages (all stages in two-shaft operation).
- the rotational movement of the gear 60 and thus also of the gears can be converted into a linear movement.
- the three images symbolize different operating states of the clamping device.
- Fig. 4a shows the clamping process in which the piston rod is moved against the working gas (over) pressure pl in the pneumatic actuator 10 (Fig. 1).
- the travel of the piston and thus the energy stored in the gas spring can be selected: after the desired piston position has been reached, the piston rod is locked against the force of the gas spring with the aid of the locking unit 40 (FIG. 1).
- the gear wheel 20c with pawl freewheel is driven in a first direction of rotation (by motor 70 via gear 60 from Fig.l), the gear 30c toothed with 20c is thereby moved, but can also be driven by a motor like 20c.
- Force is transmitted to the piston rod 10c via the pawl freewheel 21c / 22c / 23c or 31c / 32c / 33c.
- transverse loads on the associated bearings and / or seals on the piston and / or piston rod 10c can be avoided or reduced. In principle, however, a one-sided drive is sufficient, for example only via gear 20c.
- Fig. 4b shows an opposite direction of rotation in which the piston rod is not driven, since the drive links of the freewheel do not interlock with the lifting links of the piston rod.
- a position as shown in FIG. 4c can be approached in which any contact between piston rod 10e and freewheel 21-23e / 31-33e on gears 20e / 30e is avoided becomes.
- the gear wheel position from FIG. 4c can be ensured, for example, by the self-locking of the drive (motor 70 with high gear ratio 60 from FIG. 1); an additional locking is not required.
- the pawl freewheel consists of drive members 21c, which are rotatably mounted and have a stop or some form of locking, whereby the piston rod 10c is moved in a direction of rotation of 20c when the drive member 21c and lifting member 11c of the piston rod interlock.
- drive link 21c can be moved largely without resistance via lifting links 11c by moving the drive link around its axis of rotation to such an extent that the lifting link can be moved past. This state is shown in FIG. 4b: drive link 21d gives way to lifting link lld.
- the drive links are preferably designed as pawls of a pawl freewheel and can be designed to match the corresponding lifting links (e.g. "teeth") on the piston rod, whereby linear loads between the drive and lifting links are avoided and surface loads are aimed at (Stribeck pressure instead of Hertzian Pressing).
- the freewheel also includes means to move the drive links from an evasive position (as shown in FIG. 4b based on the relative position of 21d and 11d) back into a driving position (as in FIG. 4a). to deliver.
- This can be, for example, springs 22c with an abutment 23c.
- Torsion springs leg springs coaxially with the rotatable mounting of the drive links, one spring leg being firmly connected to the drive link and the second leg to the gear 20c.
- FIG. 5 shows a further alternative embodiment of an actuator, in particular a variant of an actuator 10 (first actuator) from FIG. 1 that is easy to implement. Fig. 2.
- the pneumatic actuator 10 here comprises a cylinder 12f, the cylinder 12f being designed to have a valve seat 13f, the third piston lOf being designed to act as a shut-off body for this valve seat or to have a corresponding shut-off body so that the third piston lOf and the cylinder 12f together form a valve which can be closed by pressing the third piston lOf and therefore the shut-off body against the valve seat 13f formed by the cylinder 12f or attached to it by means of a sufficient external force.
- 13f thus shows the valve formed from piston lOf and cylinder 12f
- 14f and 17f are guide rings (e.g. made of antimony-impregnated graphite)
- 15f are piston rings e.g. from the sealing materials already discussed above with regard to FIG. 2.
- Reference symbols 16f represent rings with a U or also double U profile, which form the cavities already explained with regard to FIG. 2, preferably partially filled with lubricant; these rings are literally threaded onto the piston via the piston rod llf.
- the pressure required for sealing can then be applied with the aid of the force of the pretensioned (plate) spring assembly 18f and a nut 19f.
- So-called brushless direct current motors are particularly suitable as motor 70, specifically preferably those with axial flux guidance. These achieve the highest power densities with high electrical Efficiency, and their polarization by the permanent magnets causes a sufficient detent torque to - after reduction by gear 60 - a clamping device 50 like.
- FIGS. 4a-c to be held securely in the state shown in FIG. 4c; the person skilled in the art is therefore not dependent on the self-locking due to the inherent friction of the gear 60 and does not have to provide any additional locking for the tensioning device 50 (for locking 40).
- the motor 70 can advantageously be designed asymmetrically to have a higher electrical efficiency in the direction of rotation at a rated shaft power in which the gas spring is tensioned (ie, for example, the freewheel device is toothed with the piston rod 01).
- the motor 70 like the motor control 80, can be actively or passively cooled with air; For particularly demanding applications with particularly high setting frequencies and / or setting energies, evaporative cooling can also be used to cool both assemblies.
- the operating pressure in the working gas reservoir 20 in the fully tensioned state is preferably at least 10 bar, more preferably at least 20 bar, more preferably at least 40 bar, more preferably at least 60 bar, more preferably at least 80 bar, more preferably at least 100 bar, and more preferably at least 120 bar. Maraging steels are particularly suitable as the material for the working gas reservoir (s).
- Nitrogen as dry as possible is suitable as the working gas ("as dry as possible” is to be understood here in such a way that the formation of dew can be safely excluded over the entire operating range) (possibly also the risk of hydrogen embrittlement) instead of nitrogen offers the advantage that, due to its high speed of sound, even at comparatively very high piston speeds, gas dynamics play a subordinate role: with heavy gases and high piston speeds, the piston movement initially occurs during a setting process a non-vanishing drop in the working gas pressure felt by the piston crown (the working piston of actuator 10), followed by an increase in pressure (“overshoot") when the piston is suddenly decelerated; this process is associated with irreversibilities, so it reduces the effect degree, and also distributes the force unfavorably over the travel of the gas spring.
- polyatomic gases and in particular more than diatomic gases such as CF4 have the advantage of having a lower isentropic exponent, which, given the same starting conditions and the same compression ratio, leads to a lower temperature increase in the working gas during compression (i.e. the tensioning of the gas spring) and thus to lower heat losses - and consequently leads to lower irreversibilities than is the case with monatomic gases.
- Gas mixtures should also be considered.
- nitrogen CO 2 can be added to increase the isentropic exponent of the gas mixture.
- the use of CO 2 as the working gas (working medium) also offers the advantage of being able to store working medium with a very high density in a refill reservoir (reference number 21 from FIG. 1) to compensate for leakage losses.
- the respective working gases can no longer be regarded as ideal gases: cohesive pressure and co-volume do not disappear.
- the working gas (s) should dissolve in them as little as possible and have the lowest possible diffusivity in them in order to achieve the lowest possible leakage rate to reach.
- a leak rate is to be considered as low as possible if the setting tool enables at least 10,000 subsidence under all normal ambient conditions and can be stored for at least 5 years without refilling with working gas being necessary.
- the cylinder and working gas reservoir can be regarded as a piston drive and suffer from a fundamental problem with regard to setting tools with setting pistons:
- the abrupt movement of the piston mass can lead to a pronounced upward stroke of the setting tool during the setting process and especially when driving the nail or bolt, which affects the quality of the setting can affect.
- Fig. 6 shows a further preferred embodiment of a hand-held nailing device.
- the setting piston 610 (e.g. the second movable part or piston II2 (from FIG. 1) when using the decoupling device) here has at most a quarter of the mass of the drive 600.
- the drive 600 is particularly advantageously arranged so that it can move axially in the setting device, for example on guides 690.
- the piston drive 600 (e.g. gas spring drive, electrodynamic drive or the like) is designed here in such a way that it has a significantly higher mass than the piston 610 itself, preferably at least four times the mass and particularly preferably more than ten times the mass.
- the piston drive 600 (in this case, for example (see Fig. 1), motor 70, reduction gear 60, clamping device 50, lock 40, the piston of actuator 10, possibly with valve 30 and working gas reservoir 20) is in or on the setting device along the axis of movement of the piston 610 arranged to be movable, for example with the aid of one or more rails or other guides 690, the extended path of movement of the center of gravity S1 of the piston preferably leading through the center of gravity S2 of the piston drive 600, insofar as this is structurally possible and within the scope of manufacturing accuracy, and the piston drive 600 having at least one stroke start position A and one stroke end position region B.
- An additional lock 620 fixes the piston drive in a stroke start position A with respect to the remaining parts of the setting device and in particular with respect to its handle 630, provided that no setting process takes place.
- the lock 620 becomes either active (e.g. with the help of an actuator) or passive (e.g. through the kickback itself), which initially caused the piston drive 600 to return during the setting process a certain travel s' is made possible.
- the travel s ' is particularly preferably dimensioned so that the driving in of the nail or bolt is completed before the travel is "used up", i.e. before the piston drive 600 has moved backwards by the travel s'.
- shock absorber 640 e.g.
- the return energy can also be used in a known manner for "ammunition transport" (cartridges, nails).
- the handle 630 of the setting tool is rotatably connected, for example by means of a joint 670, to, for example, the housing 680 of the setting tool, in which the piston drive 600 is displaceably arranged.
- This rotary movement can in turn be dampened and reset, which is just as possible with the aid of polymer dampers as with the aid of one or more hydraulic shock absorbers 641 with resetting spring or springs; a lock 621 analogous to lock 620 is possible and may be advantageous if necessary.
- This locking if present, preferably unlocks immediately before the still returning piston drive 600 is dampened and in particular after (!) The setting process has been completed. After resetting to the stroke start position by the spring of the second damper 641, for example, the lock 621 closes.
- the method described not only improves the setting quality but also greatly reduces the biomechanical stress on the worker, in particular with regard to force peaks occurring during the setting process, which can prevent fatigue and injuries.
- Setting devices designed in accordance with the main claim of this application are characterized by a high setting energy density and can in any case be built lighter than e.g. conventional gas spring setting tools.
- the piston drives of combustion-powered and especially powder-powered setting devices as well as those based on electrodynamic drives (e.g. Thomson coils) can have very high gravimetric setting energy densities and / or very high rates of force increase on the piston, so that the damping method described above appears particularly useful for such devices too, workers from fatigue and protect injuries. The latter may become even more relevant in the future due to stricter occupational safety regulations.
- a decoupling device for example designed with the aid of actuator 11 from FIG. 1, is also capable of other setting devices allow as such with gas spring.
- extremely powerful electrodynamic drives with movable, mutually repelling coils are known, for example from WO 2012/079572 A2 and WO 2014/056487 A2.
- a setting device can be implemented in which an electrodynamic drive is preferred instead of a gas spring or a gas spring drive.
- Fig. 2 from WO 2012/079572 A2 is used, with its movable armature together with its exciter coil A serving as the movable "piston".
- the electrodynamic drives mentioned are not readily suitable as drives for setting tools for the following reasons:
- a further embodiment of a hand-held setting tool comprises an electromagnetic drive, preferably with a Thomson coil actuator, e.g. according to WO 2018/104406 A1 (see e.g. FIG. 1 therein), ie an electrodynamic drive with a first excitation coil, a soft magnetic frame , and a squirrel-cage rotor mounted movably along an axis or a movably mounted short-circuit winding, the soft magnetic frame having a saturation flux density of at least 1.0 T and / or an effective specific electrical conductivity of at most 10 L 6 S / m.
- the frame is designed as a "flux concentrator"
- the first Excitation coil is directly or indirectly counter-supported on the frame and is formed, for example, from fiber-reinforced flat wire.
- the hand-held setting tool also has the decoupling device explained above, wherein the movably mounted squirrel-cage rotor or the movably mounted short-circuit winding is formed in a (e.g.
- the movement process of the first movable part or piston is at least partially decoupled from the movement of the second movable part or piston in the actuator for driving of the nail or bolt, which leads to a reduction in recoil when setting in solid ground.
- a hand-held setting tool comprises an electromagnetic drive according to, for example, WO 2012/079572 A2 or WO 2014/056487 A2 (as explained further below), i.e. an electromagnetic drive with at least a first coil and a second coil, wherein the first coil is formed on or in a flux concentrator and the second coil is a movable coil.
- the movable coil is formed in or on a movable element (piston, armature) which effects the movement process of the first movable part or piston in the actuator ("striking mechanism").
- the movement process of the first movable part is or Piston, caused or driven by the moving coil, at least partially decoupled from the movement of the second movable part or piston in the actuator for driving the nail or the bolt, which leads to a reduction in the recoil.
- the problem (A) is eliminated by the decoupling device.
- the problem (B) with regard to the electrodynamic drive with moving coils can also be eliminated by the decoupling device, since with a short, limited stroke of the electric drive (compared to the setting stroke) the strands can be much shorter and are accordingly exposed to lower inertia forces during operation ;
- the supply of electrical power to the movable coil (s) can be released, if necessary, by sliding contacts.
- the problem (C) can also be solved by the decoupling device, since the armature (“piston”) is now decelerated in a defined manner: the “armature” or piston is felt by the gas cushion that forms between the two pistons of actuator 11 during a setting process e.g. the electric drive does not have a hard stop.
- the drive can be reset in a simple manner:
- the coils are at least temporarily supplied with current in opposite directions (particularly preferably with the aid of a capacitor discharge) so that repulsive forces act between the coils.
- the flow of current in opposite directions preferably also leads to mutual compensation of the electromagnetic far field that is generated, so that fewer requirements have to be placed on the shielding properties of a housing of the setting tool.
- the coils can be energized in the same direction, so that an attractive (Lorentz) force acts between the coils.
- FIG. 7 shows, in a further embodiment, an electrodynamic piston drive with moving coils in combination with a decoupling device, for example actuator 11 from FIG. 1.
- a decoupling device for example actuator 11 from FIG. 1.
- This is a particularly powerful variant of the electrodynamic drive which, with the help of at least one moving coil, predominantly Non-metallic working piston can accelerate with a very high efficiency, and compared with the prior art by a higher electrical efficiency and a lower device mass with the same setting energy.
- Fig. 7 symbolically shows the setting tool in the "ready to fire" position.
- Iron circle also "flux concentrator", ie a body made of soft magnetic material.
- the iron circle preferably has a saturation flux density of at least IT, preferably at least 1.5T and more preferably at least 1.9T and in particular an effective electrical conductivity of at most 10 6S / m, more preferably at most 10 5S / m and more preferably at most 10 4S / m; various soft magnetic composite materials meet these requirements.
- a soft magnetic composite material is used for iron circle 701, which may be segmented professionally, a crack of 701. The segmentation thus serves the purpose of preventing the tensile strength (and preferably also the yield point) of the soft magnetic composite material from being locally exceeded during a setting process
- Drive piston preferably formed entirely or predominantly from a plastic, in particular a glass fiber-filled liquid crystal polymer, which can be designed to have at least one guide axis
- Base plate made of soft magnetic solid material, in particular a ferritic steel, is used for shielding (EMC, EMC) and as a heat sink
- tube made of CFRP used in particular to relieve strain on iron circuit 710 and to center 710 and 780
- Tube made of an aluminum alloy which preferably has the highest possible electrical conductivity, and which in the present case serves to shield alternating electromagnetic fields
- cylinder for example made of a high-strength steel that can be polished well
- capacitor CI is first charged via switching converter SMPS (with a battery-operated setting device, of course, with the help of electrical energy from the battery or batteries BAT).
- the capacitor CI should have the highest possible energy density and the lowest possible electrical series resistance and a particularly high one Have short-circuit strength.
- Corresponding capacitors are commercially available as film capacitors especially for pulse applications.
- the thyristor SCR can be ignited to set a nail.
- Both coils are preferably connected in series in such a way that the current in both coils flows in opposite directions during the setting process, so they repel each other.
- Cu flat wire is particularly suitable for achieving the highest possible degree of filling with minimal electrical resistance.
- the feed lines 700 can be guided directly through the piston 720 or its (rear) "guide axis"; the feed lines are very preferably made of an aluminum alloy or copper, in particular in the form of fine, highly flexible strands, and are strain-relieved outside the piston 720, for example with Aid of carbon fibers or carbon fiber fabric: It is essential that the strain relief, which is mechanically connected in parallel with the supply lines, consists of a material with sufficient tensile strength - i.e. does not tear under the given conditions - and has a higher tensile modulus than the electrical supply lines themselves, which it is intended to relieve.
- the strain relief is preferably dimensioned to protect the electrical conductors from tensile stress (during or as a result of a setting process) that exceeds their yield point or even tensile strength. More preferably, the material of the strain relief should have a high specific strength Tissues can meet these requirements.
- the drive piston 720 (first piston) is designed to form an actuator 11 with the setting piston 730 (second piston) and cylinder 780, i.e. a decoupling device as explained above (e.g. according to FIG. 1).
- the invention can be implemented in practice as follows:
- the drawing, including the circuit diagram, is transferred to an FEM model and the geometry is parameterized, with corresponding (material) properties being assigned to the individual components in the list of reference symbols.
- Real properties are assumed for the electrical components, i.e. the circuit diagram is shown in the model with a corresponding equivalent circuit diagram.
- the gas dynamics can also be taken into account.
- the number of turns of the first flat coil 711 and of the second movable flat coil 721 are preferably the same, so that, as a result of being connected in series, they always generate (almost) the same flux.
- a parametric optimization is carried out ("parametric sweeps"), whereby constructive, e.g. production-related requirements - for example minimum wall thicknesses, representable (flat) wire thicknesses, etc. - are taken into account; otherwise, (all) geometric parameters and the number of turns are varied and it becomes Looking for a Pareto optimum, also taking into account the prices for parts, components, materials and approval requirements (EMC, EMC, etc.). Based on the optimum found in this way, a mechanical engineering design can then take place, which is already due to questions of assembly and production differ from the initially simple FEM model, be more complicated and possibly contain other components to be taken into account. Based on this construction, a new parametric FEM optimization is carried out.
- El. Hand-held setting tool for setting nails and / or bolts in a substrate comprising:
- At least one electrochemical energy store 90 for example an accumulator or a fuel cell
- At least one motor controller 80 preferably comprising an inverter
- At least one electric motor 70 preferably a brushless direct current motor, more preferably with axial flux guidance
- At least one reduction gear 60 preferably a multi-stage epicyclic gear
- At least one tensioning device 50 preferably comprising a pawl freewheel
- At least one working gas reservoir 20 containing a working gas which can also be a mixture of different pure gases, as well
- the pneumatic actuator 10 comprises at least one piston with a piston rod 01, is in fluid connection with the working gas reservoir 20, and forms a gas spring together with the working gas reservoir 20,
- the actuator 10 has a stroke start position in which the gas spring is stretched to the maximum, and a stroke end position range in which the gas spring is less stretched, characterized in that the working gas reservoir 20 with the gas spring stretched to the maximum under a working gas pressure of more than 10 bar, more preferably more than 20 bar, more preferably more than 40 bar, more preferably more than 60 bar, more preferably more than 80 bar, more preferably more than 100 bar and particularly preferably more than 120 bar, and the volume of the working gas reservoir 20 is at least the same , preferably more than twice the size, further is preferably more than three times as large, and more preferably more than four times as large as the maximum stroke volume of the pneumatic actuator 10, wherein the gas spring is first tensioned to set a nail by the electric motor 70 with the help of motor control 80 with electrical power Energy storage 90 is supplied and controlled to drive via reduction gear 60 clamping device 50, which in turn can convert the torque of reduction gear 60 into a force to move the piston of actuator 10 against the pressure of the working gas, after reaching a desired piston
- Setting device characterized in that the setting device is dimensioned such that the maximum kinetic energy of the moving parts of actuator 10, expressly including all parts firmly connected to the piston of actuator 10, reaches at least half of the ultimately effective driving energy during an actuating process.
- Piston for a pneumatic actuator and in particular a gas spring characterized in that it comprises a plurality of piston rings, and that axially, that is, along the direction of movement of the piston, cavities are arranged between the piston rings or the piston is designed to have cavities, which are preferably partially are filled with a lubricant, but not completely.
- Piston for a pneumatic actuator according to E4 characterized in that the fluid is a liquid lubricant.
- Piston for a pneumatic actuator according to claim E5 characterized in that the fluid is a non-Newtonian fluid, in particular a shear-thinning fluid, which preferably also has thixotropic properties.
- Piston for a pneumatic actuator according to E6 characterized in that the non-Newtonian and in particular structurally viscous fluid, which is preferably also thixotropic, is produced by dispersing one or more solid lubricants such as, for example, hBN and / or graphite and / or MoS2 and / or the Dissolving one or more oligomers or polymers in the liquid lubricant is represented.
- solid lubricants such as, for example, hBN and / or graphite and / or MoS2 and / or the Dissolving one or more oligomers or polymers in the liquid lubricant is represented.
- Pneumatic actuator comprising a cylinder and a piston according to one or more of the pistons according to E3 to E7, characterized in that the cylinder is designed to have a valve seat, and that the piston is designed to act as a shut-off body for this valve seat or a corresponding shut-off body so that the piston and cylinder together form a valve which can be closed by pressing the piston and thus the shut-off body against the valve seat formed by the cylinder or attached to it by means of a sufficient external force.
- Impact mechanism for a setting tool characterized in that it transfers kinetic energy of a first piston of a piston drive to a movable part, for example a second piston, and the nail or bolt is driven entirely or predominantly with the aid of the kinetic energy of the movable part, the first Piston and moving part not rigid are connected to one another, whereby the first piston and the movable part are decoupled with respect to their stroke lengths.
- Impact mechanism for a setting tool comprising at least a first and a second piston and a cylinder, the pistons being arranged opposite one another, i.e. as in opposed piston engines, in the cylinder, with gas-dynamic seals such as labyrinth seals preferably being provided as sealing means instead of piston rings , and wherein the first piston is driven to transmit momentum to the second piston via gas located between the pistons, and, for example via a piston rod, the kinetic energy of the second piston can be used to drive a nail and / or bolt or for hammer drilling can.
- gas-dynamic seals such as labyrinth seals preferably being provided as sealing means instead of piston rings
- Hurry. Impact mechanism according to E10 characterized in that a reset device is provided for a second piston.
- Striking mechanism according to claim E10 or Eil characterized in that the pistons and / or the running surface of the cylinder are hard chrome-plated.
- Hand-held setting tool comprising at least
- an axially movable piston drive mounted in or on the setting tool with one or more stroke start positions and a stroke end position area
- a piston which can be driven by the piston drive and which preferably has at most a quarter of the mass of the piston drive
- shock absorber such as a hydraulic shock absorber
- a resetting device for example a resetting spring, which is able to move the piston drive back from its stroke end position range to a stroke start position with respect to the setting tool, characterized in that the lock opens or can be opened during a setting process, so that the Piston drive can move through the kickback felt by it from a stroke start position in the direction of the stroke end position range, this return of the piston drive can be braked by the shock absorber, whereby the piston drive is preferably only braked after a return by a certain return distance from the shock absorber, and the return distance so is dimensioned that the nail or bolt is predominantly or, preferably, fully driven in before the shock absorber becomes effective and brakes the return of the piston drive.
- Hand-operated setting tool according to E13 or E14, characterized in that the extended path (s) of the center of gravity (s) of the piston or pistons lead or lead through the center of gravity of the piston drive at least during the driving in of the nail or bolt, which in the present case leads to It should be understood that during driving the minimum distance of the said extended path (s) to the center of gravity of the piston drive is always at least five times, but preferably more than ten times less than the minimum distance of those same elongated paths to the center of gravity of the entire setting tool.
- E16 Hand-operated setting tool according to one or more of E13 to E15, characterized in that the setting tool has at least one handle, and that this handle is rotatably mounted with respect to a part of the setting tool, in or on which a piston drive is axially movably arranged, with at least one mechanical damper , for example a hydraulic shock absorber or a polymer damper, is provided to dampen a rotary movement between the handle and the part to which the handle is rotatably connected, whereby a lock can be provided that such a rotary movement is blocked while none Setting process takes place.
- Setting device comprising an impact mechanism according to one or more of E9 to E13, the piston drive being an electrodynamic drive and the mass accelerated by the piston drive is to be understood as a piston or comprises the mass of the first movable part of the impact mechanism according to E9.
- the electrodynamic claim comprises at least one excitation coil and at least one movable second coil or one movable short-circuit winding, which can preferably be arranged on a part made of soft magnetic material that is displaceable along a movement axis, the soft magnetic material preferably having a saturation flux density of has at least 1.5T and more preferably an effective specific electrical conductivity of at most 10 L 6 S / m.
- Hand-held setting tool for setting a nail or a bolt in a substrate comprising: a drive 600, preferably a gas spring drive or an electrodynamic drive, which drives a setting piston 610 which is used to drive the nail or the bolt into the substrate; characterized in that the setting piston 610 has at most a quarter of the mass of the drive 600.
- Hand-operated setting tool according to E20, an openable lock 620, which is designed to fix the drive in one or more stroke start positions; a shock absorber 640 such as a hydraulic shock absorber; a restoring device, for example a restoring spring, which is designed to move the drive back from a stroke end position to a stroke start position with respect to the setting tool; being in the course of a Setting process, the lock 620 opens or can be opened, so that the drive 600 can move from a stroke start position A in the direction of the stroke end position area due to the kickback felt by it, whereby this return of the drive 600 can be braked by the shock absorber 640, whereby the drive 600 is preferred is only braked by the shock absorber 640 after a return by a predetermined return distance s', and the return distance is dimensioned so that the nail or bolt is predominantly or, preferably, completely driven in before the shock absorber 640 becomes effective and brakes the return of the drive.
- a shock absorber 640 such as a hydraulic shock absorber
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Portable Nailing Machines And Staplers (AREA)
Abstract
Description
Claims
Priority Applications (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU2020306332A AU2020306332B2 (en) | 2019-06-26 | 2020-02-06 | Handheld setting tool |
| EP20704811.7A EP3990225A1 (de) | 2019-06-26 | 2020-02-06 | Handgeführtes setzgerät |
| US17/619,714 US11883938B2 (en) | 2019-06-26 | 2020-02-06 | Handheld setting tool |
| JP2021577400A JP7575408B2 (ja) | 2019-06-26 | 2020-02-06 | ハンドヘルドセッティングツール |
| CN202080056635.7A CN114269518B (zh) | 2019-06-26 | 2020-02-06 | 手持式安装工具 |
| CA3145144A CA3145144A1 (en) | 2019-06-26 | 2020-02-06 | Handheld setting tool |
| US18/532,095 US20240173832A1 (en) | 2019-06-26 | 2023-12-07 | Handheld setting tool |
Applications Claiming Priority (8)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102019004422 | 2019-06-26 | ||
| DE102019004422.3 | 2019-06-26 | ||
| DE102019005599.3 | 2019-08-08 | ||
| DE102019005599 | 2019-08-08 | ||
| DE102019005792.9 | 2019-08-20 | ||
| DE102019005792 | 2019-08-20 | ||
| DE102019006714.2 | 2019-09-25 | ||
| DE102019006714 | 2019-09-25 |
Related Child Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US17/619,714 A-371-Of-International US11883938B2 (en) | 2019-06-26 | 2020-02-06 | Handheld setting tool |
| US18/532,095 Continuation US20240173832A1 (en) | 2019-06-26 | 2023-12-07 | Handheld setting tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2020259870A1 true WO2020259870A1 (de) | 2020-12-30 |
Family
ID=69570640
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2020/053023 Ceased WO2020259870A1 (de) | 2019-06-26 | 2020-02-06 | Handgeführtes setzgerät |
Country Status (7)
| Country | Link |
|---|---|
| US (2) | US11883938B2 (de) |
| EP (1) | EP3990225A1 (de) |
| JP (1) | JP7575408B2 (de) |
| CN (1) | CN114269518B (de) |
| AU (1) | AU2020306332B2 (de) |
| CA (1) | CA3145144A1 (de) |
| WO (1) | WO2020259870A1 (de) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023285307A1 (de) | 2021-07-10 | 2023-01-19 | Rhefor Gbr | Setzgerät |
| DE102023204429A1 (de) | 2023-05-12 | 2024-11-14 | Robert Bosch Gesellschaft mit beschränkter Haftung | Nagelpistole mit einer Sensoreinheit |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11951601B2 (en) * | 2019-06-14 | 2024-04-09 | Milwaukee Electric Tool Corporation | Lifter mechanism for a powered fastener driver |
| US12479074B2 (en) | 2019-06-14 | 2025-11-25 | Milwaukee Electric Tool Corporation | Lifter mechanism for a powered fastener driver |
| US12179326B2 (en) | 2019-06-14 | 2024-12-31 | Milwaukee Electric Tool Corporation | Lifter mechanism for a powered fastener driver |
| EP3838490A1 (de) * | 2019-12-20 | 2021-06-23 | Hilti Aktiengesellschaft | Arbeitsgerät |
| WO2022076376A1 (en) * | 2020-10-06 | 2022-04-14 | Kyocera Senco Industrial Tools, Inc. | Pneumatic fastening tool with wireless sensor package |
| US20250214214A1 (en) * | 2023-12-29 | 2025-07-03 | Milwaukee Electric Tool Corporation | Predictive torque control for a power tool |
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- 2020-02-06 JP JP2021577400A patent/JP7575408B2/ja active Active
- 2020-02-06 AU AU2020306332A patent/AU2020306332B2/en active Active
- 2020-02-06 CN CN202080056635.7A patent/CN114269518B/zh active Active
- 2020-02-06 US US17/619,714 patent/US11883938B2/en active Active
- 2020-02-06 CA CA3145144A patent/CA3145144A1/en active Pending
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| DE102023204429A1 (de) | 2023-05-12 | 2024-11-14 | Robert Bosch Gesellschaft mit beschränkter Haftung | Nagelpistole mit einer Sensoreinheit |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114269518B (zh) | 2025-02-18 |
| JP2022538435A (ja) | 2022-09-02 |
| US20220355451A1 (en) | 2022-11-10 |
| CA3145144A1 (en) | 2020-12-30 |
| AU2020306332A1 (en) | 2022-02-03 |
| US11883938B2 (en) | 2024-01-30 |
| US20240173832A1 (en) | 2024-05-30 |
| AU2020306332B2 (en) | 2026-02-19 |
| EP3990225A1 (de) | 2022-05-04 |
| CN114269518A (zh) | 2022-04-01 |
| JP7575408B2 (ja) | 2024-10-29 |
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