EP3541576A1 - Schwungradangetriebenes setzgerät - Google Patents
Schwungradangetriebenes setzgerätInfo
- Publication number
- EP3541576A1 EP3541576A1 EP17797356.7A EP17797356A EP3541576A1 EP 3541576 A1 EP3541576 A1 EP 3541576A1 EP 17797356 A EP17797356 A EP 17797356A EP 3541576 A1 EP3541576 A1 EP 3541576A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- flywheel
- stator
- setting tool
- driven setting
- tool according
- 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.)
- Granted
Links
Classifications
-
- 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 invention relates to a flywheel driven setting tool for driving fasteners into a ground, with at least one flywheel, which is driven directly by an electric motor.
- German Offenlegungsschrift DE 10 2005 000 077 A1 discloses an electrically operated driving tool for fastening elements, having a drive arrangement for a driving ram displaceably mounted in a guide, which has at least one drive flywheel which can be set in rotation by an electric motor, and with a rear part device via which the drive tappet is convertible into a starting position.
- European Patent EP 2 127 819 B1 discloses a fastener driving tool adapted to drive fasteners into a workpiece, comprising at least one electric motor having a central stator and an outer rotor adapted to rotate about the stator wherein at least a portion of the rotor comprises the flywheel.
- the object of the invention is to provide a flywheel driven setting tool for driving fasteners into a ground, with at least one flywheel, which is driven directly by an electric motor, which has a good efficiency and a long life.
- the task is in a flywheel-driven setting tool for driving fasteners into a ground, with at least one flywheel, the direct is driven by an electric motor, achieved in that the flywheel drive comprises two internal rotors.
- the fasteners are, for example, nails or bolts, which are driven into the ground with the aid of the setting device, which is also referred to as a setting tool.
- the set energy is advantageously provided via the electric motor and transmitted via the flywheel to a drive-in element, which is also referred to as a set piston.
- the flywheel is rotated by the electric motor.
- the rotational energy of the flywheel is for a setting process on the driving element, in particular the setting piston, which is also abbreviated as piston, transmitted.
- the fastener is driven into the ground.
- the flywheel is frictionally connected to the driving element, for example by means of a suitable coupling device.
- the driving element between the flywheel and a counter-roller can be arranged.
- the driving element is released from the flywheel by opening the coupling device.
- the driving element can be returned to its original position by means of a suitable rear-part device, for example a spring device.
- a preferred embodiment of the flywheel-driven setting tool is characterized in that the flywheel drive comprises two inner rotors, which are each rotatably arranged in a stator.
- the two inner rotors of the preferably brushless internal rotor motors are advantageously arranged symmetrically, together with the stator devices, with respect to the flywheel.
- the flywheel drive via two motor units, which share the inner rotor, gives the flywheel drive a high performance with a low total weight.
- Coils or coil windings of the preferably brushless internal rotor motors can advantageously be arranged radially very far outside. This provides the advantage that in the coils or coil windings generated during operation heat can be dissipated directly to the environment. This reliably prevents heat accumulation inside the internal rotor motors.
- Internal mechanically sensitive electromagnets of the internal rotor motors are Advantageously protected against undesirable high centrifugal accelerations or against strong shocks.
- flywheel-driven setting tool is characterized in that the two inner rotors are non-rotatably connected to a rotor shaft which extends through the stator means.
- the rotor shaft is rotatably mounted in the axial direction preferably outside the inner rotors and the stator devices, for example in a fixed support structure of the setting device by means of suitable storage facilities.
- the inner rotors comprise permanent magnets which are rotatable radially within the stator means and cooperate with stator windings.
- the permanent magnets on the rotor shaft interact via the stator devices, in particular via the coils or coil windings of the stator devices.
- the inner rotors comprise rotor windings which are rotatable radially inside permanent magnets of the stator means.
- the inner rotors may consist wholly or partly of rotor windings.
- the stator devices may consist wholly or partly of permanent magnets.
- flywheel driven setting tool is characterized in that the inner rotors comprise rotor windings which are rotatable radially inwardly of stator windings of the stator means.
- a magnetic field is built up during operation of the internal rotor motor via the windings or coils formed by the windings.
- a further preferred exemplary embodiment of the flywheel-driven setting tool is characterized in that air-guiding elements are provided on the stator devices, on the inner rotors and / or on the flywheel, which serve during operation of the internal rotor motors to generate a cooling air flow along the windings.
- the air guide elements are, for example, fan plates. By the air guide elements, the cooling of the internal rotor motors can be significantly improved.
- a further preferred embodiment of the flywheel-driven setting tool is characterized in that the stator devices are arranged symmetrically to a central axis of the flywheel, which is connected in the axial direction between the stator means rotatably connected to the rotor shaft. The central axis of the flywheel is perpendicular to its axis of rotation.
- flywheel-driven setting tool is characterized in that a flywheel body is connected to form at least one annular cavity with one or the rotor shaft.
- the annular cavity is represented, for example, by webs and / or spoke-like connections between the flywheel body and the rotor shaft.
- flywheel-driven setting tool is characterized in that a flywheel body is connected via a drive disk to one or the rotor shaft.
- the drive plate has, for example, the shape of a circular disk.
- the flywheel body advantageously extends radially outward of the stator means in opposite axial directions. As a result, a relatively large flywheel mass can be displayed in a simple manner.
- the internal rotor motor of the flywheel-driven setting device is equipped with Hall sensors for detecting a flywheel position and / or flywheel speed.
- the information acquired with the Hall sensors enables individual windings to be electronically controlled in dependence on the inner rotor position in order to drive the internal rotor motors.
- the invention also relates to a method for operating a flywheel-driven setting device described above.
- the invention also relates to a flywheel, an inner rotor and / or a stator device for a previously described setting tool.
- the parts mentioned are separately tradable. Further advantages, features and details of the invention will become apparent from the following description in which, with reference to the drawings, various embodiments are described in detail. Show it:
- Figure 1 is a simplified representation of a flywheel driven setting device with a flywheel drive, comprising an electric motor assembly with two internal rotor motors;
- Figure 2 is a simplified representation of an embodiment of the flywheel drive with two internal rotor motors in longitudinal section;
- Figure 3 shows a similar flywheel drive as in Figure 2 with a more compact design of the internal rotor motors.
- FIG. 1 shows in simplified form a flywheel-driven setting tool 1 with a housing 2.
- the housing 2 has a handle 4 with a trigger 5. Therefore, the setting tool 1 is also referred to as a hand-held setting tool or setting tool.
- an accumulator 6 for storing electrical energy is integrated.
- the electrical energy of the accumulator 6 is used to drive an electric motor or an electric motor assembly 8.
- the electric motor assembly 8 advantageously comprises two internal rotor motors. With the two internal rotor motors, the flywheel 9 is advantageously driven directly. About the two internal rotor motors, the flywheel 9 can be set quickly and with high torque in rotation.
- the setting tool 1 further comprises a driving element 10 with a setting piston 12, which is shortened also referred to as a piston.
- the driving element 10 and the setting piston 12 is disposed between the flywheel 9 and a counter-roller 1 1.
- the counter-roller 1 1 can be configured differently with the flywheel 9 and the driving element 10 disposed therebetween, also as a helical gear.
- the setting piston 12 has at its left in Figure 1 end a piston tip 13, with a fastener 14 at the setting end 15 of the setting device 1 in a (not shown) underground can be driven.
- the fastening elements 14 are, for example, bolts or nails, which via a magazine 16 at the setting end 15 of the setting device. 1 preferably be provided automatically. As arranged in Figure 1 above in the magazine 16 fastener 14 is guided in a bolt guide 18.
- the setting piston 12 or the driving element 10 is in the setting tool 1 by means of at least one piston guide 20 in the axial direction, ie in Figure 1 to the left and to the right, guided back and forth movable.
- the piston guide 20 includes two guide rollers 21, 22. To drive the fastener of the set piston 12 is moved with its piston tip 13 with great acceleration through the piston guide 20 to the fastener 14 to. After a setting operation of the setting piston 12 is moved by means of a return spring 24 back to its initial position shown in Figure 1.
- the setting device 1 further comprises a wedge 25 which is movable by a plunger 26 by an electromagnet 27 to press the counter-roller 1 1 in Figure 1 down against the driving element 10.
- a type of clutch is shown, which serves to frictionally connect the driving element 10 with the flywheel 9.
- FIGs 2 and 3 are two embodiments of flywheel drives 40; 80, each having an electric motor assembly with two internal rotor motors 71, 72; 1 1 1, 1 12 include.
- flywheel drive 40; 80 with the two internal rotor motors 71, 72; 1 1 1, 1 12 can be provided in a simple manner very quickly a sufficiently large setting energy in a reduced space, which via the flywheel 9 to a driving element 50; 90 can be transmitted, which corresponds to the driving element 10 in Figure 1.
- the flywheel drive 40 illustrated in FIG. 2 comprises two inner rotors 41, 42, which are rotatable together about an axis of rotation 43.
- a flywheel 9 in FIG. 2 corresponds to the flywheel 9 in FIG. 1.
- the flywheel 9 includes a flywheel body 44.
- the flywheel body 44 has radially outward two annular grooves 45, 46, in which V-ribs 47, 48 engage.
- the V-ribs 47, 48 are formed on an underside of the driving-in element 50.
- the flywheel body 44 is rotatably connected to a rotor shaft 54 via exemplified webs 51, 52.
- a ring cavity 55 is shown in an advantageous manner.
- the annular cavity 55 is bounded radially outward by the flywheel body 44. Radially inside the cavity 55 is bounded by a rotor shaft 54. In axial directions of the annular cavity 55 is bounded by the webs 51, 52.
- the inner rotors 41, 42 of the inner rotor motors 71, 72 are also non-rotatably connected to the rotor shaft 54.
- By an arrow 56 a rotational movement of the rotor shaft 54 together with the flywheel body 44 and the inner rotors 41, 42 is indicated.
- the rotor shaft 54 is rotatably supported in the axial direction on the outside, that is to say in FIG. 2 on the left and on the right, by bearing devices 58, 59.
- the storage devices 58, 59 are preferably arranged fixed to the housing in the setting tool.
- the inner rotor 41 is rotatably arranged in a stator 61 of the inner rotor motor 71. In the axial direction, the stator 61 and the inner rotor 41 between the bearing means 58 and the flywheel 9 are arranged.
- the inner rotor 42 is rotatably arranged in a stator 62 of the inner rotor motor 72. In the axial direction, the stator 62 and the inner rotor 42 between the flywheel 9 and the bearing device 59 are arranged.
- the stator means 61, 62 are symmetrically arranged and executed together with the inner rotors 41, 42.
- the stator devices 61, 62 are equipped with coil windings 63, 64, which are also referred to as stator windings.
- the inner rotors 41, 42 are equipped with permanent magnets 65, 66 which cooperate with each other and with the stator windings 63, 64.
- the two inner rotors 41, 42 of the inner rotor motors 71, 72 are rotatably connected to each other and to the flywheel 9 via the common rotor shaft 54.
- the common rotor shaft 54 is rotatably supported by the bearing means 58, 59 in the housing of the setting device.
- the stator means 61, 62 are fixedly mounted in the housing of the setting device and do not rotate.
- stator windings 63, 64 of the stator devices 61, 62 are driven synchronously, the rotor shaft 54 is rotated due to an interaction between the stator windings 63, 64 and the permanent magnets 65, 66. This rotational movement is transmitted via the webs 51, 52 to the flywheel body 44 of the flywheel 9.
- the rotational movement of the flywheel 9 is transmitted to drive the driving element 50 for driving a fastener. Due to the enormous power consumption when accelerating the flywheel 9, the stator windings 63, 64 are very hot. However, the waste heat occurring during the acceleration of the flywheel 9 can be simply released to the environment, for example via a fan on the rotor shaft 54.
- the flywheel drive 80 shown in FIG. 3 with the two internal-rotor motors 1 1 1, 1 12 comprises two inner rotors 81, 82 which are rotatable about an axis of rotation 83.
- a flywheel 9, which corresponds to the flywheel 9 in FIG. 1, comprises a flywheel body 84 which has radially outside two annular grooves 85, 86. In the annular grooves 85, 86 engage V-ribs 87, 88, which are provided on an underside of a driving element 90.
- the driving element 90 corresponds to the driving element 50 in FIG. 2.
- the flywheel body 84 of the flywheel 9 is non-rotatably connected to a rotor shaft 94 by a driver disk 91.
- the rotor shaft 94 is rotatably mounted with the inner rotors 81, 82 and the drive plate 91 with the flywheel body 84 of the flywheel 9 in Figure 3 left and right by means of bearings 98, 99 in the housing of the setting device.
- an arrow 100 a rotational movement of the rotor shaft 94 with the inner rotors 81, 82 and the flywheel 9 is indicated.
- the inner rotors 81, 82 are radially inward of stator devices 101, 102 in the same manner as in the flywheel drive 40 shown in FIG rotatably arranged.
- the stator devices 101, 102 are fixedly arranged in the housing of the setting device and provided with stator windings 103, 104.
- the stator windings 103, 104 interact with permanent magnets 105, 106, which constitute the inner rotors 81, 82.
- the flywheel drive 80 shown in FIG. 3 with the two internal-rotor motors 1 1 1, 1 12 provides, inter alia, the advantage that it has a more compact design than the flywheel drive of FIG. 2.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP16199460.3A EP3323562A1 (de) | 2016-11-18 | 2016-11-18 | Schwungradangetriebenes setzgerät |
| PCT/EP2017/079066 WO2018091414A1 (de) | 2016-11-18 | 2017-11-13 | Schwungradangetriebenes setzgerät |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP3541576A1 true EP3541576A1 (de) | 2019-09-25 |
| EP3541576B1 EP3541576B1 (de) | 2022-01-05 |
Family
ID=57348545
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP16199460.3A Withdrawn EP3323562A1 (de) | 2016-11-18 | 2016-11-18 | Schwungradangetriebenes setzgerät |
| EP17797356.7A Active EP3541576B1 (de) | 2016-11-18 | 2017-11-13 | Schwungradangetriebenes setzgerät |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP16199460.3A Withdrawn EP3323562A1 (de) | 2016-11-18 | 2016-11-18 | Schwungradangetriebenes setzgerät |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US20190366525A1 (de) |
| EP (2) | EP3323562A1 (de) |
| WO (1) | WO2018091414A1 (de) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2023163393A (ja) * | 2022-04-28 | 2023-11-10 | 株式会社マキタ | 打込み工具 |
| EP4576562A1 (de) * | 2023-12-21 | 2025-06-25 | Hilti Aktiengesellschaft | Verfahren zum modellbasierten bestimmen einer betriebstemperatur bei einem elektrohandwerkzeug |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102005000077A1 (de) | 2005-06-16 | 2006-12-21 | Hilti Ag | Elektrisch betriebenes Eintreibgerät |
| US7575141B1 (en) * | 2008-02-04 | 2009-08-18 | De Poan Pneumatic Corp. | Actuator for electrical nail gun |
| GB0809868D0 (en) | 2008-05-30 | 2008-07-09 | Black & Decker Inc | Fastener driving tool |
| DE102009056347B4 (de) * | 2009-11-30 | 2020-12-24 | Stadler Keppler Maschinenbau GmbH | Antriebskopf für NC-gesteuerte Stellbewegungen einer Werkzeugspindel |
| US10022848B2 (en) * | 2014-07-28 | 2018-07-17 | Black & Decker Inc. | Power tool drive mechanism |
-
2016
- 2016-11-18 EP EP16199460.3A patent/EP3323562A1/de not_active Withdrawn
-
2017
- 2017-11-13 EP EP17797356.7A patent/EP3541576B1/de active Active
- 2017-11-13 WO PCT/EP2017/079066 patent/WO2018091414A1/de not_active Ceased
- 2017-11-13 US US16/461,577 patent/US20190366525A1/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| EP3323562A1 (de) | 2018-05-23 |
| WO2018091414A1 (de) | 2018-05-24 |
| EP3541576B1 (de) | 2022-01-05 |
| US20190366525A1 (en) | 2019-12-05 |
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