EP4101592B1 - Pressing device and pressing system - Google Patents

Pressing device and pressing system Download PDF

Info

Publication number
EP4101592B1
EP4101592B1 EP21179007.6A EP21179007A EP4101592B1 EP 4101592 B1 EP4101592 B1 EP 4101592B1 EP 21179007 A EP21179007 A EP 21179007A EP 4101592 B1 EP4101592 B1 EP 4101592B1
Authority
EP
European Patent Office
Prior art keywords
spindle
wheel
pressing
drive wheel
drive
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.)
Active
Application number
EP21179007.6A
Other languages
German (de)
French (fr)
Other versions
EP4101592A1 (en
Inventor
Valentin STALDER
Roger Dejakum
Albert Loichinger
Peter Eichenberger
Raphael JUD
Rudolf Kamber
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Geberit International AG
Original Assignee
Geberit International AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Geberit International AG filed Critical Geberit International AG
Priority to EP21179007.6A priority Critical patent/EP4101592B1/en
Publication of EP4101592A1 publication Critical patent/EP4101592A1/en
Application granted granted Critical
Publication of EP4101592B1 publication Critical patent/EP4101592B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
    • B25B27/02—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for connecting objects by press fit or detaching same
    • B25B27/10—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for connecting objects by press fit or detaching same inserting fittings into hoses

Definitions

  • the present invention relates to a pressing device according to claim 1 and a pressing system according to claim 14.
  • press fittings When connecting drinking water pipes, press fittings are often used, which are pressed using a pressing tool.
  • Such pressing tools include a pressing device and a pressing tool, such as a pressing jaw or a pressing loop, which is interchangeably attached to the pressing device.
  • a pressing force can be applied to the pressing jaws and the press fitting is pressed with the pressing jaws.
  • a piston in the pressing device is extended with high force and acts on the pressing jaws.
  • such pressing devices are designed to be electro-hydraulic, with an oil pressure being built up using a pump, which then causes a force on the piston, which in turn acts on the pressing jaws.
  • the hydraulic mode of operation has various disadvantages. Very precise tolerances are required in terms of manufacturing technology, which makes production expensive. Handling the oil during initial filling and also during maintenance work is complex. The oil continues to diffuse over time, which leads to a loss of pressing force.
  • the DE 203 05 473 U1 proposes a hydraulic oil-free pressing device, with a planetary gear being provided between a pressing ram and a drive.
  • the use of such planetary gears is disadvantageous because the planetary gears are very complex and therefore prone to failure.
  • planetary gears are usually very voluminous, which makes them difficult to use in tight spaces.
  • a pressing device according to the preamble of claim 1 is out US 6,240,626 B1 known.
  • the invention is based on the object of providing a pressing device which overcomes the disadvantages of the prior art.
  • a pressing device comprises an electric motor with an output shaft, a gear driven by the output shaft, a spindle driven by the gear, which defines a central axis, a press piston driven by the spindle, and a tool holder for receiving a pressing tool.
  • the gear has a first gear part acting on the spindle and a second gear part acting on the spindle.
  • the first gear part has a first drive wheel and spindle wheel, the spindle being mounted in the spindle wheel in a rotationally fixed and longitudinally displaceable manner.
  • the spindle wheel is rotatable with respect to a rotation about the central axis and fixed with respect to a movement along the central axis, i.e. stored immovably.
  • the second gear part has a second drive wheel and a spindle nut driven by the second drive wheel.
  • the spindle nut is rotatable with respect to a rotation about the central axis and fixed with respect to a movement along the central axis, i.e. stored immovably.
  • the spindle wheel and the spindle nut are set in rotation, such that the spindle experiences an axial feed with respect to the spindle wheel and with respect to the spindle nut, with this axial feed of the spindle of the press piston experiencing a feed movement in the direction of the tool holder, so that a pressing movement can be carried out by the pressing piston.
  • the spindle is moved in the axial direction relative to the spindle wheel and the spindle nut as well as to the two drive wheels.
  • the spindle is moved forward from a starting position in the direction of the central axis moved to an end position.
  • the movement from the end position to the starting position is carried out by driving the electric motor in reverse.
  • a freewheel which is arranged so that only the spindle nut rotates relative to the spindle or the spindle rotates relative to the spindle nut.
  • the outer diameter of the spindle essentially defines the buckling resistance of the spindle.
  • the outside diameter of the spindle has only a very small influence on the compactness of the pressing device.
  • a pressing device can therefore be specified which can apply large forces as long as it is compact.
  • the first drive wheel and the second drive wheel are arranged on a common drive shaft. This has the advantage of a simple design because only one drive shaft has to be driven by the output shaft of the electric motor.
  • the output shaft of the electric motor acts indirectly on the drive shaft via a drive gear.
  • a translation or reduction stage can be provided in the drive housing.
  • the output shaft of the electric motor acts directly on the drive shaft, which can simplify the mechanical design.
  • the drive shaft can also be provided by the output shaft from the electric motor.
  • the first drive wheel and the spindle wheel each have teeth, with the teeth of the first drive wheel engaging in the teeth of the spindle wheel.
  • the second drive wheel and the spindle wheel each have teeth, with the teeth of the second drive wheel engaging in the teeth of the spindle wheel.
  • Designing the elements mentioned as gear wheels has the advantage that large forces can be transmitted efficiently.
  • the teeth are preferably external teeth.
  • the teeth can be of any design, especially with regard to the number and shape of the teeth.
  • the distance between the first drive wheel and the second drive wheel is fixed.
  • the distance between the spindle wheel and the spindle nut is also fixed.
  • the spindle wheel and the spindle nut are set in rotation.
  • the translations between the first drive wheel and the spindle wheel and between the second drive wheel and the spindle nut are such that the spindle nut rotates at a lower speed than the spindle, so that said propulsion can be provided, and that preferably a larger torque is provided via the spindle nut can be provided on the spindle than via the spindle wheel.
  • the transmission ratio between the first drive wheel and the spindle wheel is smaller than the transmission ratio between the second drive wheel and the spindle nut.
  • the gear ratio between the first drive wheel and the spindle wheel is between 1:2 and 1:10, in particular 1:5.13.
  • the gear ratio between the second drive wheel and the spindle nut is between 1% and 50%, in particular 9%, higher than between the first drive wheel and the spindle wheel.
  • the overall gear ratio of the gearbox is preferably between 1:20 and 1:200, especially at 1:65.
  • the speed of the drive shaft and thus of the first drive wheel and the second drive wheel is in the range from 500 revolutions per minute to 15,000 revolutions per minute, in particular in the range from 1,500 revolutions per minute to 5,000 revolutions per minute.
  • the difference in speed between the spindle and the spindle nut is preferably in the range from 60 to 3,000 revolutions per minute.
  • the spindle and the spindle nut preferably rotate in the same direction of rotation.
  • the pressing device further has a support structure, wherein the first drive wheel and the spindle wheel are rotatably mounted at one bearing point of the support structure, and the second drive wheel and the spindle nut are rotatably mounted at another bearing point in the support structure.
  • the two bearing points are at a fixed distance from one another and are preferably firmly connected to one another.
  • the drive wheels, the spindle wheel and the spindle nut are mounted on the bearing point via roller bearings, the bearing point having correspondingly designed receptacles.
  • the electric motor and/or the drive shaft of the drive gear is also mounted on the support structure.
  • the tool holder is preferably also mounted on the support structure.
  • the rotationally fixed and longitudinally displaceable connection between the spindle wheel and the spindle is provided by a splined shaft connection, in particular by a multi-splined shaft connection.
  • a mechanically simple storage can be provided, which can well fulfill the two functions of being rotationally fixed and longitudinally displaceable.
  • the spindle is preferably connected to the press piston via an axial bearing.
  • the pressing piston is mounted in a longitudinal guide in the direction of the central axis of the spindle, but is mounted on the tool holder in a rotationally fixed manner.
  • the first drive wheel and the second drive wheel are axially offset from the central axis of the spindle.
  • the elements of the two gear parts are therefore located next to the spindle.
  • the pitch of the spindle is in the range from 1.5 to 10, in particular from 5 to 7, millimeters and / or that the spindle and the spindle nut are designed as a ball screw.
  • the diameter of the spindle is in the range from 10 to 30 millimeters, in particular from 18 to 22 millimeters.
  • the spindle can also be designed as a spindle with a metric thread or as a spindle with a trapezoidal thread.
  • the pitch of the metric thread or the trapezoidal thread is in the range of 1.5 to 10 millimeters.
  • the power of the motor is in the range of 200 to 1500 watts.
  • the motor's torque is in the range of 0.5 to 4.5 Newton meters.
  • the pressing piston preferably has a pair of rollers on the front, which can be moved against a pressing tool fastened in the tool holder.
  • the pressing force provided by the pressing piston is applied to the pressing tool via the pair of rollers.
  • the information given here regarding the parameters can also be made larger or smaller when scaling the pressing device.
  • a pressing system includes a pressing device as described above and a pressing tool inserted into the tool holder, such as a pressing jaw or a pressing loop.
  • the pressing device 1 comprises an electric motor 2 with an output shaft 3, a gear 4 driven by the output shaft 3, a spindle 5 driven by the gear 4, which defines a central axis M, a press piston 6 driven by the spindle 5, and a tool holder 7 Recording a pressing tool.
  • the pressing device further comprises a drive gear 11, which is arranged between the output shaft 3 and the gear 4.
  • the pressing tool is, for example, a pressing jaw or pressing tongs, a pressing sling or another pressing tool. A fitting of a pipe connection can be pressed using the pressing tool.
  • the pressing device 1 and the pressing tool not shown in the figures, form a pressing system.
  • the electric motor 2 acts on the transmission 4 with its output shaft 3.
  • the drive gear mentioned is arranged between the gear 4.
  • a gear 11a of the drive gear 11 is arranged on the output shaft 3 of the electric motor 2.
  • the gear 11a acts on a gear 10a of a drive shaft 10 of the transmission 4.
  • the output shaft 3 is connected to the rotor shaft of the electric motor via a shaft coupling 25.
  • the output shaft 3 can also be provided directly by the rotor shaft.
  • the tool holder 7 has a mouth-like receiving section 16 and a bearing opening 17 in which the press piston 6 is mounted.
  • the pressing tool is stored in the mouth-like receiving section 16.
  • Various pressing tools can be used in the receiving section 16.
  • the transmission 4 has a first transmission part 8 and a second transmission part 9. Both the first gear part 8 and the second gear part 9 act on the spindle.
  • the first gear part 8 has a first drive wheel 8a and a spindle wheel 8b.
  • the second gear part 9 has a second drive wheel 9a and a spindle nut 9b.
  • the two drive wheels 8a, 9a are mounted on the drive shaft 10, which, as described above, is driven directly or indirectly by the electric motor 2 via the drive gear 11.
  • a support structure 12 is present in which the individual parts are stored.
  • the support structure 12 according to the present embodiment essentially comprises a first bearing point 13 and a second bearing point 14.
  • the two bearing points 13, 14 are firmly connected to one another. For example, via a housing or a similar structure.
  • the first bearing point 13 provides storage for the drive gear 11 and the electric motor 2.
  • the first bearing point also provides storage for the drive shaft 10 and the spindle wheel 8b.
  • the first storage point 13 has corresponding storage openings for storing the elements mentioned, in which the elements mentioned are stored.
  • the spindle wheel 8b is rotatable, but axially immovable, mounted in the corresponding bearing opening.
  • the second bearing point 14 provides storage for the drive shaft 10 and the spindle nut 9b.
  • the drive shaft 10 is mounted on the first bearing point 13 and the second bearing point 14.
  • the second storage point 14 has corresponding storage openings for storing the elements mentioned, in which the elements mentioned are stored.
  • the spindle nut 9b is rotatable, but axially immovable, stored in the corresponding bearing opening.
  • the tool holder 7 is also firmly connected to the support structure.
  • the spindle 5 is mounted with a spindle end 18 in a rotationally fixed and longitudinally displaceable manner in the spindle wheel 8b.
  • the storage is such that a rotational movement acting on the spindle wheel 8b can be transferred to the spindle 5, the spindle 5 being set in rotation, and that the spindle 5 is displaceable in the directions of its central axis M relative to the spindle wheel 8b. This shift is the result of the action of the second Gear part 9, as will be described below.
  • the spindle 5 is connected to the spindle wheel 8b via a splined shaft connection 19.
  • Other types of connection are also conceivable.
  • the spindle nut 9b engages in the external thread 20 on the spindle 5.
  • the spindle nut has an internal thread 21.
  • the spindle nut 9b is rotated about the central axis M of the spindle 5 via the second drive wheel 9a.
  • the speed of the spindle nut 9b is smaller than the speed of the spindle wheel 8b. This means that the spindle 5 rotates faster than the spindle nut 9b.
  • This provides spindle propulsion and this spindle propulsion can also be used to apply the pressure force to the press block 6.
  • the spindle nut 9b is rotatable with respect to rotation about the central axis M and fixed with respect to movement along the central axis M.
  • the spindle nut 9b is firmly mounted with respect to axial movement.
  • the two drive wheels 8a, 9a rotate.
  • the drive wheel 8a drives the spindle wheel 8b and the drive wheel 9a drives the spindle nut 9b.
  • the translations between the first drive wheel 8a and the spindle wheel 8b and between the second drive wheel 9a and the spindle nut 9b are such that the spindle nut 9b rotates at a lower speed than the spindle 5, so that said propulsion can be provided, and that via the Spindle nut 9b a greater torque can be provided to the spindle 5 than via the spindle wheel 8b.
  • the speed difference between the spindle wheel 8b and the spindle nut 9b forms the speed relevant for the spindle feed. In other words, the spindle wheel 8b rotates at a higher speed than the spindle nut 9b.
  • the transmission ratio between the first drive wheel 8a and the spindle wheel 8b is between 1:2 and 1:10, in particular at 1:5.13, and the transmission ratio between the second drive wheel 9a and the spindle nut 9b is between 1% and 50%, in particular around 9%, higher than between the first drive wheel and the spindle wheel.
  • the overall transmission ratio of the gearbox 4 is preferably between 1:20 and 1:200, in particular 1:65.
  • the Figure 4a shows a sectional view through the section line BB Figure 3 .
  • the output shaft 3 of the electric motor 2 engages in the gear 10a of the drive shaft 10.
  • the Figure 4b shows a sectional view through the section line CC Figure 3 .
  • the first drive wheel 8a engages with the spindle wheel 8b.
  • the Figure 4c shows a sectional view through the section line DD of the Figure 3 .
  • the second drive wheel 9a engages in the spindle nut 9b.
  • the first drive wheel 8a and the spindle wheel 8b each have teeth, the teeth of the first drive wheel 8a engaging in the teeth of the spindle wheel 8b.
  • the second drive wheel 9a and the spindle nut 9b each have teeth, the teeth of the second drive wheel 9a engaging in the teeth of the spindle wheel 9b.
  • the toothing is an integral part of the spindle wheel 8b.
  • the teeth are designed separately from the actual nut and are connected to the nut with a wedge connection 26. Integral training would also be conceivable.
  • an axial bearing 15 is arranged, which acts on the press piston 6.
  • the spindle 5 has a shoulder-shaped receptacle 22 on which the axial bearing 15 rests.
  • the press piston also has a receptacle 23, which also serves to accommodate the axial bearing.
  • the pressing piston 6 here also has a pair of rollers 24, which acts on the pressing tool.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Press Drives And Press Lines (AREA)

Description

TECHNISCHES GEBIETTECHNICAL FIELD

Die vorliegende Erfindung betrifft eine Pressvorrichtung nach Anspruch 1 und ein Presssystem nach Anspruch 14.The present invention relates to a pressing device according to claim 1 and a pressing system according to claim 14.

STAND DER TECHNIKSTATE OF THE ART

Bei der Verbindung von Trinkwasserleitungen werden häufig Pressfittings eingesetzt, welche mit einem Presswerkzeug verpresst werden. Derartige Presswerkzeuge umfassen eine Pressvorrichtung und ein an der Pressvorrichtung austauschbar angebrachtes Presswerkzeug, wie eine Pressbacke oder eine Pressschlinge. Mit der Pressvorrichtung kann eine Presskraft auf die Pressbacken aufgebracht werden und mit den Pressbacken wird der Pressfitting gepresst. Bei Ausführen der Pressung wird im Pressgerät ein Kolben mit hoher Kraft ausgefahren und wirkt auf die Pressbacken ein.When connecting drinking water pipes, press fittings are often used, which are pressed using a pressing tool. Such pressing tools include a pressing device and a pressing tool, such as a pressing jaw or a pressing loop, which is interchangeably attached to the pressing device. With the pressing device, a pressing force can be applied to the pressing jaws and the press fitting is pressed with the pressing jaws. When the pressing is carried out, a piston in the pressing device is extended with high force and acts on the pressing jaws.

Typischerweise sind derartige Pressvorrichtungen elektrohydraulisch ausgebildet, wobei mit einer Pumpe ein Öldruck aufgebaut wird, der dann eine Kraft auf den Kolben bewirkt, welcher wiederum auf die Pressbacken wirkt.Typically, such pressing devices are designed to be electro-hydraulic, with an oil pressure being built up using a pump, which then causes a force on the piston, which in turn acts on the pressing jaws.

Die hydraulische Funktionsweise hat verschiedene Nachteile. Fertigungstechnisch sind sehr genaue Toleranzen gefordert, was die Herstellung teuer macht. Die Handhabe des Öls bei der erstmaligen Befüllung und auch bei Wartungsarbeiten ist komplex. Weiter diffundiert das Öl über die Zeit, was zu einem Presskraftverlust führt.The hydraulic mode of operation has various disadvantages. Very precise tolerances are required in terms of manufacturing technology, which makes production expensive. Handling the oil during initial filling and also during maintenance work is complex. The oil continues to diffuse over time, which leads to a loss of pressing force.

Die DE 203 05 473 U1 schlägt ein hydraulikölloses Pressgerät vor, wobei ein Planetengetriebe zwischen einem Pressstössel und einem Antrieb vorgesehen ist. Der Einsatz von solchen Planetengetrieben ist nachteilig, weil die Planetengetriebe sehr komplex und somit störungsanfällig sind. Zudem sind die Planetengetriebe meist sehr voluminös, was den Einsatz bei engen Platzverhältnissen erschwert. Eine Pressvorrichtung gemäß Oberbegriff des Anspruchs 1 ist aus US 6 240 626 B1 bekannt.The DE 203 05 473 U1 proposes a hydraulic oil-free pressing device, with a planetary gear being provided between a pressing ram and a drive. The use of such planetary gears is disadvantageous because the planetary gears are very complex and therefore prone to failure. In addition, planetary gears are usually very voluminous, which makes them difficult to use in tight spaces. A pressing device according to the preamble of claim 1 is out US 6,240,626 B1 known.

DARSTELLUNG DER ERFINDUNGPRESENTATION OF THE INVENTION

Ausgehend von diesem Stand der Technik liegt der Erfindung eine Aufgabe zugrunde, eine Pressvorrichtung anzugeben, welche die Nachteile des Standes der Technik überwindet. Insbesondere ist es eine Aufgabe der vorliegenden Erfindung eine Pressvorrichtung anzugeben, welche kompakt ist und welche hohe Presskräfte aufbringen kann.Based on this prior art, the invention is based on the object of providing a pressing device which overcomes the disadvantages of the prior art. In particular, it is an object of the present invention to provide a pressing device which is compact and which can apply high pressing forces.

Diese Aufgabe löst der Gegenstand von Anspruch 1. Demgemäss umfasst eine Pressvorrichtung einen Elektromotor mit einer Abtriebswelle, ein mit der Abtriebswelle angetriebenes Getriebe, eine mit dem Getriebe angetriebene Spindel, welche eine Mittelachse definiert, einen mit der Spindel angetriebenen Presskolben, und eine Werkzeugaufnahme zur Aufnahme eines Presswerkzeugs.This object is solved by the subject matter of claim 1. Accordingly, a pressing device comprises an electric motor with an output shaft, a gear driven by the output shaft, a spindle driven by the gear, which defines a central axis, a press piston driven by the spindle, and a tool holder for receiving a pressing tool.

Das Getriebe weist einen auf die Spindel einwirkenden ersten Getriebeteil und einen auf die Spindel einwirkenden zweiten Getriebeteil auf.The gear has a first gear part acting on the spindle and a second gear part acting on the spindle.

Der erste Getriebeteil weist ein erstes Antriebsrad und Spindelrad auf, wobei die Spindel drehfest und längsverschieblich im Spindelrad gelagert ist. Das Spindelrad ist bezüglich einer Drehung um die Mittelachse drehbar und bezüglich einer Bewegung entlang der Mittelachse festgelegt, also unverschieblich gelagert.The first gear part has a first drive wheel and spindle wheel, the spindle being mounted in the spindle wheel in a rotationally fixed and longitudinally displaceable manner. The spindle wheel is rotatable with respect to a rotation about the central axis and fixed with respect to a movement along the central axis, i.e. stored immovably.

Der zweite Getriebeteil weist ein zweites Antriebsrad und eine mit dem zweiten Antriebsrad angetriebene Spindelmutter auf. Die Spindelmutter ist bezüglich einer Drehung um die Mittelachse drehbar und bezüglich einer Bewegung entlang der Mittelachse festgelegt, also unverschieblich gelagert.The second gear part has a second drive wheel and a spindle nut driven by the second drive wheel. The spindle nut is rotatable with respect to a rotation about the central axis and fixed with respect to a movement along the central axis, i.e. stored immovably.

Bei einer Drehung der beiden Antriebsräder werden das Spindelrad und die Spindelmutter in Drehbewegung versetzt, derart, dass die Spindel einen axialen Vorschub bezüglich des Spindelrads und bezüglich der Spindelmutter erfährt, wobei bei diesem axialen Vorschub der Spindel der Presskolben eine Vorschubbewegung in Richtung der Werkzeugaufnahme erfährt, so dass eine Pressbewegung durch den Presskolben ausführbar ist. Mit anderen Worten gesagt wird die Spindel in axialer Richtung relativ zum Spindelrad und zur Spindelmutter sowie zu den beiden Antriebsrädern bewegt.When the two drive wheels rotate, the spindle wheel and the spindle nut are set in rotation, such that the spindle experiences an axial feed with respect to the spindle wheel and with respect to the spindle nut, with this axial feed of the spindle of the press piston experiencing a feed movement in the direction of the tool holder, so that a pressing movement can be carried out by the pressing piston. In other words, the spindle is moved in the axial direction relative to the spindle wheel and the spindle nut as well as to the two drive wheels.

Die Spindel wird dabei von einer Ausgangsstellung in Richtung der Mittelachse nach vorne in eine Endstellung bewegt. Die Bewegung von der Endstellung in die Ausgangsstellung erfolgt durch umgekehrten Antrieb des Elektromotors. Für eine schnellere Rückstellung wäre es auch denkbar einen Freilauf vorzusehen, welcher so angeordnet ist, dass lediglich die Spindelmutter relativ zur Spindel dreht bzw. die Spindel relativ zur Spindelmutter dreht.The spindle is moved forward from a starting position in the direction of the central axis moved to an end position. The movement from the end position to the starting position is carried out by driving the electric motor in reverse. For a faster reset, it would also be conceivable to provide a freewheel, which is arranged so that only the spindle nut rotates relative to the spindle or the spindle rotates relative to the spindle nut.

Der Aussendurchmesser der Spindel definiert im Wesentlichen die Knickfestigkeit der Spindel. Gleichzeitig hat der Aussendurchmesser der Spindel nur einen sehr geringen Einfluss auf die Kompaktheit der Pressvorrichtung. Somit kann eine Pressvorrichtung angegeben werden, welche unter der Massgabe einer kompakten Ausbildung grosse Kräfte aufbringen kann.The outer diameter of the spindle essentially defines the buckling resistance of the spindle. At the same time, the outside diameter of the spindle has only a very small influence on the compactness of the pressing device. A pressing device can therefore be specified which can apply large forces as long as it is compact.

Vorzugsweise sind das erste Antriebsrad und das zweite Antriebsrad auf einer gemeinsamen Antriebswelle angeordnet. Hierdurch ergeht der Vorteil einer einfachen Konstruktion, weil durch die Abtriebswelle des Elektromotors nur eine Antriebswelle angetrieben werden muss.Preferably, the first drive wheel and the second drive wheel are arranged on a common drive shaft. This has the advantage of a simple design because only one drive shaft has to be driven by the output shaft of the electric motor.

Vorzugsweise wirkt die Abtriebswelle des Elektromotors indirekt über ein Antriebsgetriebe auf die Antriebswelle. Hierdurch ergeht der Vorteil, dass beim Antriebsgehäuse eine Übersetzungs- oder Untersetzungsstufe vorgesehen werden kann. Alternativerweise wirkt die Abtriebswelle des Elektromotors direkt auf die Antriebswelle, was die mechanische Konstruktion vereinfachen kann. Die Antriebswelle kann auch durch die Abtriebswelle vom Elektromotor bereitgestellt werden.Preferably, the output shaft of the electric motor acts indirectly on the drive shaft via a drive gear. This has the advantage that a translation or reduction stage can be provided in the drive housing. Alternatively, the output shaft of the electric motor acts directly on the drive shaft, which can simplify the mechanical design. The drive shaft can also be provided by the output shaft from the electric motor.

Vorzugsweise weisen das erste Antriebsrad und das Spindelrad jeweils eine Zahnung auf, wobei die Zahnung des ersten Antriebsrads in die Zahnung des Spindelrads eingreift. Vorzugsweise weisen das zweite Antriebsrad und das Spindelrad jeweils eine Zahnung auf, wobei die Zahnung des zweiten Antriebsrads in die Zahnung des Spindelrads eingreift. Die Ausbildung der genannten Elemente als Zahnräder hat den Vorteil, dass grosse Kräfte effizient übertragen werden können. Bei der Zahnung handelt es sich vorzugsweise um eine Aussenzahnung. Die Zahnung kann beliebig ausgebildet sein, insbesondere bezüglich der Zahl und Form der Zähne.Preferably, the first drive wheel and the spindle wheel each have teeth, with the teeth of the first drive wheel engaging in the teeth of the spindle wheel. Preferably, the second drive wheel and the spindle wheel each have teeth, with the teeth of the second drive wheel engaging in the teeth of the spindle wheel. Designing the elements mentioned as gear wheels has the advantage that large forces can be transmitted efficiently. The teeth are preferably external teeth. The teeth can be of any design, especially with regard to the number and shape of the teeth.

Anstelle von der Zahnung können auch andere eine Drehbewegung und ein Drehmoment übertragbare Element vorgesehen werden.Instead of the teeth, other elements that can transmit rotary movement and torque can also be provided.

Der Abstand zwischen dem ersten Antriebsrad und dem zweiten Antriebsrad ist fest.The distance between the first drive wheel and the second drive wheel is fixed.

Ebenfalls ist der Abstand zwischen dem Spindelrad und der Spindelmutter fest. Bei der Drehung der beiden Antriebsräder werden das Spindelrad und die Spindelmutter in Drehbewegung versetzt. Aufgrund der festen Lagerung in axialer Richtung findet aber keine Verschiebung zwischen Antriebsrad und Spindelmutter in Längsrichtung statt.The distance between the spindle wheel and the spindle nut is also fixed. When the two drive wheels rotate, the spindle wheel and the spindle nut are set in rotation. However, due to the fixed mounting in the axial direction, there is no displacement between the drive wheel and the spindle nut in the longitudinal direction.

Vorzugsweise sind die Übersetzungen zwischen dem ersten Antriebsrad und dem Spindelrad sowie zwischen dem zweiten Antriebsrad und der Spindelmutter derart, dass die Spindelmutter mit einer kleineren Drehzahl als die Spindel dreht, so dass der besagte Vortrieb bereitstellbar ist, und dass über die Spindelmutter vorzugsweise ein grösseres Drehmoment auf die Spindel bereitstellbar ist als über das Spindelrad.Preferably, the translations between the first drive wheel and the spindle wheel and between the second drive wheel and the spindle nut are such that the spindle nut rotates at a lower speed than the spindle, so that said propulsion can be provided, and that preferably a larger torque is provided via the spindle nut can be provided on the spindle than via the spindle wheel.

Die Differenz der Drehzahl zwischen dem Spindelrad und der Spindelmutter, welches die Spindel ebenfalls um die Mittelachse antreibt, entspricht der Drehzahl der Spindel, welche den Spindelvortrieb definiert.The difference in speed between the spindle wheel and the spindle nut, which also drives the spindle around the central axis, corresponds to the speed of the spindle, which defines the spindle propulsion.

Vorzugsweise ist das Übersetzungsverhältnis zwischen dem ersten Antriebsrad und dem Spindelrad kleiner als das Übersetzungsverhältnis zwischen dem zweiten Antriebsrad und der Spindelmutter.Preferably, the transmission ratio between the first drive wheel and the spindle wheel is smaller than the transmission ratio between the second drive wheel and the spindle nut.

Vorzugsweise ist das Übersetzungsverhältnis zwischen dem ersten Antriebsrad und dem Spindelrad zwischen 1:2 und 1:10, insbesondere bei 1:5.13. Vorzugsweise ist das Übersetzungsverhältnis zwischen dem zweiten Antriebsrad und der Spindelmutter zwischen 1% und 50%, insbesondere um 9%, höher ist als zwischen dem ersten Antriebsrad und dem Spindelrad.Preferably, the gear ratio between the first drive wheel and the spindle wheel is between 1:2 and 1:10, in particular 1:5.13. Preferably, the gear ratio between the second drive wheel and the spindle nut is between 1% and 50%, in particular 9%, higher than between the first drive wheel and the spindle wheel.

Das Gesamtübersetzungsverhältnis des Getriebes ist vorzugsweise zwischen 1:20 und 1:200, insbesondere bei 1:65.The overall gear ratio of the gearbox is preferably between 1:20 and 1:200, especially at 1:65.

Vorzugsweise ist die Drehzahl der Antriebswelle und somit des ersten Antriebsrads sowie des zweiten Antriebsrads im Bereich von 500 Umdrehungen pro Minute bis 15'000 Umdrehungen pro Minute, insbesondere im Bereich von 1'500 Umdrehungen pro Minute bis 5'000 Umdrehungen pro Minute. Die Differenzdrehzahl zwischen der Spindel und der Spindelmutter liegt vorzugweise im Bereich von 60 bis 3'000 Umdrehungen pro Minute.Preferably, the speed of the drive shaft and thus of the first drive wheel and the second drive wheel is in the range from 500 revolutions per minute to 15,000 revolutions per minute, in particular in the range from 1,500 revolutions per minute to 5,000 revolutions per minute. The difference in speed between the spindle and the spindle nut is preferably in the range from 60 to 3,000 revolutions per minute.

Die Spindel und die Spindelmutter rotieren vorzugsweise in die gleiche Drehrichtung.The spindle and the spindle nut preferably rotate in the same direction of rotation.

Vorzugsweise weist die Pressvorrichtung weiterhin eine Supportstruktur auf, wobei an einer Lagerstelle der Supportstruktur das erste Antriebsrad und das Spindelrad drehbar gelagert sind, und wobei an einer anderen Lagerstelle in der Supportstruktur das zweite Antriebsrad und die Spindelmutter drehbar gelagert sind.Preferably, the pressing device further has a support structure, wherein the first drive wheel and the spindle wheel are rotatably mounted at one bearing point of the support structure, and the second drive wheel and the spindle nut are rotatably mounted at another bearing point in the support structure.

Die beiden Lagerstellen stehen in einem festen Abstand zueinander und sind vorzugsweise fest miteinander in Verbindung.The two bearing points are at a fixed distance from one another and are preferably firmly connected to one another.

Vorzugsweise sind die Antriebsräder, das Spindelrad und die Spindelmutter über Wälzlager an der Lagerstelle gelagert, wobei Lagerstelle entsprechend ausgebildete Aufnahmen aufweist.Preferably, the drive wheels, the spindle wheel and the spindle nut are mounted on the bearing point via roller bearings, the bearing point having correspondingly designed receptacles.

Vorzugsweise ist an der Supportstruktur auch der Elektromotor und/oder die Antriebswelle des Antriebsgetriebes gelagert. Weiter ist an der Supportstruktur vorzugsweise auch die Werkzeugaufnahme gelagert.Preferably, the electric motor and/or the drive shaft of the drive gear is also mounted on the support structure. Furthermore, the tool holder is preferably also mounted on the support structure.

Vorzugsweise ist die drehfeste und längsverschiebliche Verbindung zwischen dem Spindelrad und der Spindel durch eine Keilwellenverbindung, insbesondere durch eine Vielkeilwellenverbindung, bereitgestellt. Hierdurch kann eine mechanisch einfache Lagerung bereitgestellt werden, welche die beiden Funktionen drehfest und längsverschieblich gut erfüllen kann.Preferably, the rotationally fixed and longitudinally displaceable connection between the spindle wheel and the spindle is provided by a splined shaft connection, in particular by a multi-splined shaft connection. In this way, a mechanically simple storage can be provided, which can well fulfill the two functions of being rotationally fixed and longitudinally displaceable.

Vorzugsweise steht die Spindel mit dem Presskolben über ein Axiallager in Verbindung.The spindle is preferably connected to the press piston via an axial bearing.

Vorzugsweise ist der Presskolben in einer Längsführung in Richtung der Mittelachse der Spindel längsverschieblich, aber drehfest an der Werkzeugaufnahme gelagert.Preferably, the pressing piston is mounted in a longitudinal guide in the direction of the central axis of the spindle, but is mounted on the tool holder in a rotationally fixed manner.

Vorzugsweise liegen das erste Antriebsrad und das zweite Antriebsrad axial zur Mittelachse der Spindel versetzt. Die Elemente der beiden Getriebeteile liegen demnach neben der Spindel.Preferably, the first drive wheel and the second drive wheel are axially offset from the central axis of the spindle. The elements of the two gear parts are therefore located next to the spindle.

Vorzugsweise ist die Steigung der Spindel im Bereich von 1.5 bis 10, insbesondere von 5 bis 7, Millimeter und/oder dass die Spindel und die Spindelmutter als Kugelgewindetrieb ausgebildet sind. Der Durchmesser der Spindel liegt im Bereich von 10 bis 30 Millimeter, insbesondere von 18 bis 22 Millimeter.Preferably, the pitch of the spindle is in the range from 1.5 to 10, in particular from 5 to 7, millimeters and / or that the spindle and the spindle nut are designed as a ball screw. The diameter of the spindle is in the range from 10 to 30 millimeters, in particular from 18 to 22 millimeters.

Alternativerweise kann die Spindel auch als Spindel mit einem metrischen Gewinde oder als Spindel mit einem Trapezgewinde ausgebildet sein. Vorzugsweise ist die Steigung des metrischen Gewindes oder des Trapezgewindes im Bereich von 1.5 bis 10 Millimeter.Alternatively, the spindle can also be designed as a spindle with a metric thread or as a spindle with a trapezoidal thread. Preferably, the pitch of the metric thread or the trapezoidal thread is in the range of 1.5 to 10 millimeters.

Vorzugsweise ist die Leistung des Motors im Bereich von 200 bis 1500 Watt. Das Drehmoment des Motors liegt im Bereich von 0.5 bis 4.5 Newtonmeter.Preferably the power of the motor is in the range of 200 to 1500 watts. The motor's torque is in the range of 0.5 to 4.5 Newton meters.

Vorzugsweise weist der Presskolben frontseitig ein Rollenpaar auf, welches gegen ein in der Werkzeugaufnahme befestigtes Presswerkzeug bewegbar ist. Über das Rollenpaar wird die vom Presskolben bereitgestellte Presskraft auf das Presswerkzeug aufgebracht.The pressing piston preferably has a pair of rollers on the front, which can be moved against a pressing tool fastened in the tool holder. The pressing force provided by the pressing piston is applied to the pressing tool via the pair of rollers.

Die hierin gemachten Angaben bezüglich der Parameter können bei einer Skalierung der Pressvorrichtung auch grösser oder kleiner gewählt werden.The information given here regarding the parameters can also be made larger or smaller when scaling the pressing device.

Ein Presssystem umfasst eine Pressvorrichtung nach obiger Beschreibung und ein in die Werkzeugaufnahme eingesetztes Presswerkzeug, wie beispielsweise eine Pressbacke oder eine Pressschlinge.A pressing system includes a pressing device as described above and a pressing tool inserted into the tool holder, such as a pressing jaw or a pressing loop.

Weitere Ausführungsformen sind in den abhängigen Ansprüchen angegeben.Further embodiments are specified in the dependent claims.

KURZE BESCHREIBUNG DER ZEICHNUNGENBRIEF DESCRIPTION OF THE DRAWINGS

Bevorzugte Ausführungsformen der Erfindung werden im Folgenden anhand der Zeichnungen beschrieben, die lediglich zur Erläuterung dienen und nicht einschränkend auszulegen sind. In den Zeichnungen zeigen:

Fig. 1
eine perspektivische Ansicht einer Pressvorrichtung nach einer Ausführungsform der vorliegenden Erfindung;
Fig. 2
eine Seitenansicht der Pressvorrichtung nach Figur 1;
Fig. 3
eine Schnittansicht der Pressvorrichtung nach Figur 1 in einer Ausgangsstellung;
Fig. 4a
eine Schnittdarstellung entlang der Schnittlinien B-B der Figur 3;
Fig. 4b
eine Schnittdarstellung entlang der Schnittlinien C-C der Figur 3;
Fig. 4c
eine Schnittdarstellung entlang der Schnittlinien D-D der Figur 3;
Fig. 5
eine weitere Schnittansicht gemäss der Figur 3 in einer Mittelstellung; und
Fig. 6
eine weitere Schnittansicht gemäss der Figur 3 in einer Endstellung.
Preferred embodiments of the invention are described below with reference to the drawings, which serve only for explanation and are not to be interpreted in a restrictive manner. Shown in the drawings:
Fig. 1
a perspective view of a pressing device according to an embodiment of the present invention;
Fig. 2
a side view of the pressing device Figure 1 ;
Fig. 3
a sectional view of the pressing device Figure 1 in a starting position;
Fig. 4a
a sectional view along the cutting lines BB of the Figure 3 ;
Fig. 4b
a sectional view along the cutting lines CC of the Figure 3 ;
Fig. 4c
a sectional view along the cutting lines DD of the Figure 3 ;
Fig. 5
another sectional view according to the Figure 3 in a middle position; and
Fig. 6
another sectional view according to the Figure 3 in an end position.

BESCHREIBUNG BEVORZUGTER AUSFÜHRUNGSFORMENDESCRIPTION OF PREFERRED EMBODIMENTS

In den Figuren 1 bis 6 werden verschiedene Ansichten einer Ausführungsform einer erfindungsgemässen Pressvorrichtung 1 gezeigt.In the Figures 1 to 6 Various views of an embodiment of a pressing device 1 according to the invention are shown.

In der Figur 1 wird eine perspektivische Ansicht und in der Figur 2 wird eine Seitenansicht der Pressvorrichtung 1 gezeigt. Die Pressvorrichtung 1 umfasst einen Elektromotor 2 mit einer Abtriebswelle 3, ein mit der Abtriebswelle 3 angetriebenes Getriebe 4, eine mit dem Getriebe 4 angetriebene Spindel 5, welche eine Mittelachse M definiert, einen mit der Spindel 5 angetriebenen Presskolben 6, und eine Werkzeugaufnahme 7 zur Aufnahme eines Presswerkzeugs. In der gezeigten Ausführungsform umfasst die Pressvorrichtung weiter ein Antriebsgetriebe 11, welches zwischen der Abtriebswelle 3 und dem Getriebe 4 angeordnet ist.In the Figure 1 becomes a perspective view and in the Figure 2 a side view of the pressing device 1 is shown. The pressing device 1 comprises an electric motor 2 with an output shaft 3, a gear 4 driven by the output shaft 3, a spindle 5 driven by the gear 4, which defines a central axis M, a press piston 6 driven by the spindle 5, and a tool holder 7 Recording a pressing tool. In the embodiment shown, the pressing device further comprises a drive gear 11, which is arranged between the output shaft 3 and the gear 4.

Das Presswerkzeug ist beispielsweise eine Pressbacke bzw. eine Presszange, eine Pressschlinge oder ein anderes Presswerkzeug. Mit dem Presswerkzeug kann ein Fitting einer Rohrverbindung verpresst werden. Die Pressvorrichtung 1 und das in den Figuren nicht dargestellte Presswerkzeug bilden ein Presssystem.The pressing tool is, for example, a pressing jaw or pressing tongs, a pressing sling or another pressing tool. A fitting of a pipe connection can be pressed using the pressing tool. The pressing device 1 and the pressing tool, not shown in the figures, form a pressing system.

Der Elektromotor 2 wirkt mit seiner Abtriebswelle 3 auf das Getriebe 4 ein. In der gezeigten Ausführungsform ist zwischen dem Getriebe 4 das genannte Antriebsgetriebe angeordnet. Auf der Abtriebswelle 3 des Elektromotors 2 ist ein Zahnrad 11a des Antriebsgetriebes 11 angeordnet. Das Zahnrad 11a wirkt auf ein Zahnrad 10a einer Antriebswelle 10 des Getriebes 4 ein. Die Abtriebswelle 3 steht mit einer Wellenkupplung 25 mit der Rotorwelle des Elektromotors in Verbindung. Die Abtriebswelle 3 kann aber auch direkt durch Rotorwelle bereitgestellt werden.The electric motor 2 acts on the transmission 4 with its output shaft 3. In the embodiment shown, the drive gear mentioned is arranged between the gear 4. A gear 11a of the drive gear 11 is arranged on the output shaft 3 of the electric motor 2. The gear 11a acts on a gear 10a of a drive shaft 10 of the transmission 4. The output shaft 3 is connected to the rotor shaft of the electric motor via a shaft coupling 25. The output shaft 3 can also be provided directly by the rotor shaft.

Die Werkzeugaufnahme 7 weist einen maulartigen Aufnahmeabschnitt 16 und eine Lageröffnung 17, in welcher der Presskolben 6 gelagert ist, auf. Im maulartigen Aufnahmeabschnitt 16 wird das Presswerkzeug gelagert. Es sind verschiedene Presswerkzeuge in den Aufnahmeabschnitt 16 einsetzbar.The tool holder 7 has a mouth-like receiving section 16 and a bearing opening 17 in which the press piston 6 is mounted. The pressing tool is stored in the mouth-like receiving section 16. Various pressing tools can be used in the receiving section 16.

Anhand der Figuren 3 bis 6 wird die Funktionsweise des Antriebs der Pressvorrichtung 1 genauer erläutert.Based on Figures 3 to 6 the operation of the drive of the pressing device 1 is explained in more detail.

Das Getriebe 4 weist einen ersten Getriebeteil 8 und einen zweiten Getriebeteil 9 auf. Sowohl der erste Getriebeteil 8 als auch der zweite Getriebeteil 9 wirken auf die Spindel. Der erste Getriebeteil 8 weist ein erstes Antriebsrad 8a und ein Spindelrad 8b auf. Der zweite Getriebeteil 9 weist ein zweites Antriebsrad 9a und eine Spindelmutter 9b auf. Die beiden Antriebsräder 8a, 9a sind auf der Antriebswelle 10 gelagert, welche, wie oben beschrieben, direkt oder indirekt über das Antriebsgetriebe 11 durch den Elektromotor 2 angetrieben wird.The transmission 4 has a first transmission part 8 and a second transmission part 9. Both the first gear part 8 and the second gear part 9 act on the spindle. The first gear part 8 has a first drive wheel 8a and a spindle wheel 8b. The second gear part 9 has a second drive wheel 9a and a spindle nut 9b. The two drive wheels 8a, 9a are mounted on the drive shaft 10, which, as described above, is driven directly or indirectly by the electric motor 2 via the drive gear 11.

In den Figuren ist weiterhin ersichtlich, dass eine Supportstruktur 12 vorhanden ist, in welcher die einzelnen Teile gelagert sind. Die Supportstruktur 12 gemäss der vorliegenden Ausführungsform umfasst im Wesentlichen eine erste Lagerstelle 13 und eine zweite Lagerstelle 14. Die beiden Lagerstellen 13, 14 sind fest miteinander verbunden. Beispielsweise über ein Gehäuse oder eine ähnliche Struktur.It can also be seen in the figures that a support structure 12 is present in which the individual parts are stored. The support structure 12 according to the present embodiment essentially comprises a first bearing point 13 and a second bearing point 14. The two bearing points 13, 14 are firmly connected to one another. For example, via a housing or a similar structure.

Die erste Lagerstelle 13 stellt eine Lagerung für das Antriebsgetriebe 11 und den Elektromotor 2 bereit. Weiter stellt die erste Lagerstelle eine Lagerung für die Antriebswelle 10 und das Spindelrad 8b bereit. Die erste Lagerstelle 13 weist für die Lagerung der genannten Elemente entsprechende Lageröffnungen auf, in welchen die genannten Elemente gelagert sind. Das Spindelrad 8b ist dabei drehbar, aber axial unverschieblich, in der entsprechenden Lageröffnung gelagert.The first bearing point 13 provides storage for the drive gear 11 and the electric motor 2. The first bearing point also provides storage for the drive shaft 10 and the spindle wheel 8b. The first storage point 13 has corresponding storage openings for storing the elements mentioned, in which the elements mentioned are stored. The spindle wheel 8b is rotatable, but axially immovable, mounted in the corresponding bearing opening.

Die zweite Lagerstelle 14 stellt eine Lagerung für die Antriebswelle 10 und die Spindelmutter 9b bereit. Die Antriebswelle 10 ist in der gezeigten Variante an der ersten Lagerstelle 13 und der zweiten Lagerstelle 14 gelagert. Die zweite Lagerstelle 14 weist für die Lagerung der genannten Elemente entsprechende Lageröffnungen auf, in welchen die genannten Elemente gelagert sind. Die Spindelmutter 9b ist dabei drehbar, aber axial unverschieblich, in der entsprechenden Lageröffnung gelagert.The second bearing point 14 provides storage for the drive shaft 10 and the spindle nut 9b. In the variant shown, the drive shaft 10 is mounted on the first bearing point 13 and the second bearing point 14. The second storage point 14 has corresponding storage openings for storing the elements mentioned, in which the elements mentioned are stored. The spindle nut 9b is rotatable, but axially immovable, stored in the corresponding bearing opening.

In der gezeigten Ausführungsform ist weiter die Werkzeugaufnahme 7 in fester Verbindung mit der Supportstruktur.In the embodiment shown, the tool holder 7 is also firmly connected to the support structure.

Die Spindel 5 ist mit einem Spindelende 18 drehfest und längsverschieblich im Spindelrad 8b gelagert. Die Lagerung ist dabei derart, dass eine auf das Spindelrad 8b wirkende Drehbewegung auf die Spindel 5 übertragbar ist wobei die Spindel 5 in Drehung versetzt wird, und dass die Spindel 5 in Richtungen ihrer Mittelachse M relativ zum Spindelrad 8b verschiebbar ist. Diese Verschiebung ist das Resultat der Einwirkung des zweiten Getriebeteils 9, wie unten beschrieben werden wird.The spindle 5 is mounted with a spindle end 18 in a rotationally fixed and longitudinally displaceable manner in the spindle wheel 8b. The storage is such that a rotational movement acting on the spindle wheel 8b can be transferred to the spindle 5, the spindle 5 being set in rotation, and that the spindle 5 is displaceable in the directions of its central axis M relative to the spindle wheel 8b. This shift is the result of the action of the second Gear part 9, as will be described below.

In der gezeigten Ausführungsform ist die Spindel 5 über eine Vielkeilwellenverbindung 19 mit dem Spindelrad 8b in Verbindung. Andere Arten der Verbindung sind auch denkbar.In the embodiment shown, the spindle 5 is connected to the spindle wheel 8b via a splined shaft connection 19. Other types of connection are also conceivable.

Die Spindelmutter 9b greift in das Aussengewinde 20 an der Spindel 5 ein. Hierfür weist die Spindelmutter ein Innengewinde 21 auf. Die Spindelmutter 9b wird über das zweite Antriebsrad 9a in Drehung um die Mittelachse M der Spindel 5 versetzt. Die Drehzahl der Spindelmutter 9b ist dabei kleiner als die Drehzahl des Spindelrades 8b. Das heisst, dass die Spindel 5 sich schneller dreht als die Spindelmutter 9b Hierdurch wird ein Spindelvortrieb bereitgestellt und durch diesen Spindelvortrieb kann auch die Druckkraft auf den Presskloben 6 aufgebracht werden. Die Spindelmutter 9b ist bezüglich einer Drehung um die Mittelachse M drehbar und bezüglich einer Bewegung entlang der Mittelachse M festgelegt gelagert. Die Spindelmutter 9b ist bezüglich einer axialen Bewegung fest gelagert.The spindle nut 9b engages in the external thread 20 on the spindle 5. For this purpose, the spindle nut has an internal thread 21. The spindle nut 9b is rotated about the central axis M of the spindle 5 via the second drive wheel 9a. The speed of the spindle nut 9b is smaller than the speed of the spindle wheel 8b. This means that the spindle 5 rotates faster than the spindle nut 9b. This provides spindle propulsion and this spindle propulsion can also be used to apply the pressure force to the press block 6. The spindle nut 9b is rotatable with respect to rotation about the central axis M and fixed with respect to movement along the central axis M. The spindle nut 9b is firmly mounted with respect to axial movement.

Bei einer Drehbewegung der Antriebswelle 10 drehen sich die beiden Antriebsräder 8a, 9a. Das Antriebsrad 8a treibt das Spindelrad 8b und das Antriebsrad 9a treibt die Spindelmutter 9b an. Die Übersetzungen zwischen dem ersten Antriebsrad 8a und dem Spindelrad 8b sowie zwischen dem zweiten Antriebsrad 9a und der Spindelmutter 9b sind derart, dass die Spindelmutter 9b mit einer kleineren Drehzahl als die Spindel 5 dreht, so dass der besagte Vortrieb bereitstellbar ist, und dass über die Spindelmutter 9b ein grösseres Drehmoment auf die Spindel 5 bereitstellbar ist als über das Spindelrad 8b. Die Drehzahldifferenz zwischen dem Spindelrad 8b und der Spindelmutter 9b bildet die für den Spindelvorschub relevante Drehzahl. Mit anderen Worten gesagt dreht das Spindelrad 8b mit einer grösseren Drehzahl als die Spindelmutter 9b.When the drive shaft 10 rotates, the two drive wheels 8a, 9a rotate. The drive wheel 8a drives the spindle wheel 8b and the drive wheel 9a drives the spindle nut 9b. The translations between the first drive wheel 8a and the spindle wheel 8b and between the second drive wheel 9a and the spindle nut 9b are such that the spindle nut 9b rotates at a lower speed than the spindle 5, so that said propulsion can be provided, and that via the Spindle nut 9b a greater torque can be provided to the spindle 5 than via the spindle wheel 8b. The speed difference between the spindle wheel 8b and the spindle nut 9b forms the speed relevant for the spindle feed. In other words, the spindle wheel 8b rotates at a higher speed than the spindle nut 9b.

Das Übersetzungsverhältnis zwischen dem ersten Antriebsrad 8a und dem Spindelrad 8b ist zwischen 1:2 und 1:10, insbesondere bei 1:5.13, ist und das Übersetzungsverhältnis zwischen dem zweiten Antriebsrad 9a und der Spindelmutter 9b ist zwischen 1% und 50%, insbesondere um 9%, höher als zwischen dem ersten Antriebsrad und dem Spindelrad.The transmission ratio between the first drive wheel 8a and the spindle wheel 8b is between 1:2 and 1:10, in particular at 1:5.13, and the transmission ratio between the second drive wheel 9a and the spindle nut 9b is between 1% and 50%, in particular around 9%, higher than between the first drive wheel and the spindle wheel.

Das Gesamtübersetzungsverhältnis des Getriebes 4 ist vorzugsweise zwischen 1:20 und 1:200, insbesondere bei 1:65.The overall transmission ratio of the gearbox 4 is preferably between 1:20 and 1:200, in particular 1:65.

Die Figur 4a zeigt eine Schnittdarstellung durch die Schnittlinie B-B der Figur 3. Hier kann gut erkannt werden, dass die Abtriebswelle 3 des Elektromotors 2 in das Zahnrad 10a der Antriebswelle 10 eingreift. Die Figur 4b zeigt eine Schnittdarstellung durch die Schnittlinie C-C der Figur 3. Hier kann gut erkannt werden, dass das erste Antriebsrad 8a in die das Spindelrad 8b eingreift. Die Figur 4c zeigt eine Schnittdarstellung durch die Schnittlinie D-D der Figur 3. Hier kann gut erkannt werden, dass das zweite Antriebsrad 9a in die Spindelmutter 9b eingreift.The Figure 4a shows a sectional view through the section line BB Figure 3 . Here can It can be clearly seen that the output shaft 3 of the electric motor 2 engages in the gear 10a of the drive shaft 10. The Figure 4b shows a sectional view through the section line CC Figure 3 . Here it can be clearly seen that the first drive wheel 8a engages with the spindle wheel 8b. The Figure 4c shows a sectional view through the section line DD of the Figure 3 . Here it can be clearly seen that the second drive wheel 9a engages in the spindle nut 9b.

In der gezeigten Ausführungsform weisen das erste Antriebsrad 8a und das Spindelrad 8b jeweils eine Zahnung auf, wobei die Zahnung des ersten Antriebsrad 8a in die Zahnung des Spindelrads 8b eingreift. Ebenso weist das zweite Antriebsrad 9a und die Spindelmutter 9b jeweils eine Zahnung auf, wobei die Zahnung des zweiten Antriebsrad 9a in die Zahnung des Spindelrades 9b eingreift. Beim Spindelrad 8b ist die Zahnung ein integraler Teil des Spindelrads 8b. Bei der Spindelmutter 9b ist die Zahnung separat von der eigentlichen Mutter ausgebildet und steht mit einer Keilverbindung 26 mit der Mutter in Verbindung. Eine integrale Ausbildung wäre auch denkbar.In the embodiment shown, the first drive wheel 8a and the spindle wheel 8b each have teeth, the teeth of the first drive wheel 8a engaging in the teeth of the spindle wheel 8b. Likewise, the second drive wheel 9a and the spindle nut 9b each have teeth, the teeth of the second drive wheel 9a engaging in the teeth of the spindle wheel 9b. In the case of the spindle wheel 8b, the toothing is an integral part of the spindle wheel 8b. In the case of the spindle nut 9b, the teeth are designed separately from the actual nut and are connected to the nut with a wedge connection 26. Integral training would also be conceivable.

In der Figur 5 wird eine Mittelstellung und in der Figur 6 wird die Endstellung gezeigt.In the Figure 5 becomes a middle position and in the Figure 6 the end position is shown.

An der Frontseite der Spindel 5 ist ein Axiallager 15 angeordnet, welches auf den Presskolben 6 wirkt. Die Spindel 5 weist eine schulterförmige Aufnahme 22 auf, auf welcher das Axiallager 15 aufliegt. Weiter weist der Presskolben eine Aufnahme 23 auf, welche ebenfalls der Aufnahme des Axiallagers dient. Der Presskolben 6 weist hier weiter ein Rollenpaar 24 auf, welches auf das Presswerkzeug wirkt. BEZUGSZEICHENLISTE 1 Pressvorrichtung 17 Lageröffnung 2 Elektromotor 18 Spindelende 3 Abtriebswelle 19 Vielkeilwellenverbindung 4 Getriebe 20 Aussengewinde 5 Spindel 21 Innengewinde 6 Presskolben 22 Aufnahme 7 Werkzeugaufnahme 23 Aufnahme 8 erster Getriebeteil 24 Rollenpaar 8a erstes Antriebsrad 25 Wellenkupplung 8b Spindelrad 26 Keilverbindung 9 zweiter Getriebeteil 9a zweites Antriebsrad 9b Spindelmutter 10 Antriebswelle 10a Zahnrad 11 Antriebsgetriebe 11a Zahnrad 12 Supportstruktur 13 Lagerstelle 14 Lagerstelle 15 Axiallager 16 Aufnahmeabschnitt On the front of the spindle 5, an axial bearing 15 is arranged, which acts on the press piston 6. The spindle 5 has a shoulder-shaped receptacle 22 on which the axial bearing 15 rests. The press piston also has a receptacle 23, which also serves to accommodate the axial bearing. The pressing piston 6 here also has a pair of rollers 24, which acts on the pressing tool. REFERENCE SYMBOL LIST 1 Pressing device 17 Warehouse opening 2 Electric motor 18 spindle end 3 output shaft 19 Splined shaft connection 4 transmission 20 External thread 5 spindle 21 inner thread 6 plunger 22 Recording 7 Tool holder 23 Recording 8th first gear part 24 Pair of roles 8a first drive wheel 25 shaft coupling 8b spindle wheel 26 Wedge connection 9 second gear part 9a second drive wheel 9b spindle nut 10 drive shaft 10a gear 11 drive gear 11a gear 12 Support structure 13 Storage location 14 Storage location 15 Thrust bearing 16 Recording section

Claims (15)

  1. A pressing device comprising
    an electric motor (2) with an output shaft (3),
    a gear (4) driven by the output shaft (3),
    a spindle (5) driven by the gear (4) and defining a center axis (M),
    a press piston (6) driven by the spindle (5), and
    a tool holder (7) for receiving a pressing tool,
    wherein the gear (4) has a first gear part (8) acting on the spindle (5),
    wherein the first gear part (8) comprises a first drive wheel (8a) and spindle wheel (8b), wherein the spindle (5) is mounted rotationally fixed and longitudinally displaceable in the spindle wheel (8b), which spindle wheel (8b) is rotatable with respect to a rotation about the center axis (M) and fixed with respect to a movement along the center axis (M),
    characterized in that gear (4) has a second gear part (9) acting on the spindle (5),
    wherein the second gear part (9) comprises a second drive wheel (9a) and a spindle nut (9b) driven with the second drive wheel (9a), which spindle nut (9b) is rotatable with respect to a rotation about the center axis (M) and fixed with respect to a movement along the center axis (M), and
    wherein upon rotation of the two drive wheels (8a, 9a) the spindle wheel (8b) and the spindle nut (9b) are set in rotational movement in such a way that the spindle (5) experiences an axial advance with respect to the spindle wheel (8b) and with respect to the spindle nut (9b), wherein upon this axial advance of the spindle (5) the press piston (6) experiences an advance movement in the direction of the tool holder (7).
  2. The pressing device (1) according to claim 1, characterized in that the first drive wheel (8a) and the second drive wheel (9a) are arranged on a common drive shaft (10).
  3. The pressing device (1) according to claim 2, characterized in that the output shaft (3) of the electric motor (2) acts indirectly on the drive shaft (10) via a drive gear (11); or in that the output shaft (3) of the electric motor (2) acts directly on the drive shaft (10).
  4. The pressing device (1) according to one of the preceding claims, characterized in that the first drive wheel (8a) and the spindle wheel (8b) each have a toothing, the toothing of the first drive wheel (8a) engaging the toothing of the spindle wheel (8b); and/or in that the second drive wheel (9a) and the spindle wheel (9b) each have a toothing, the toothing of the second drive wheel (9a) engaging the toothing of the spindle wheel.
  5. The pressing device (1) according to one of the preceding claims, characterized in that the transmission ratios between the first drive wheel (8a) and the spindle wheel (8b) and between the second drive wheel (9a) and the spindle nut (9b) are such,
    that the spindle nut (9b) rotates at a lower speed than the spindle (5), so that the said advance can be provided,
    and that a greater torque can be applied to the spindle (5) via the spindle nut (9b) than via the spindle wheel (8b).
  6. The pressing device (1) according to one of the preceding claims, characterized in that the transmission ratio between the first drive wheel (8a) and the spindle wheel (8b) is smaller than the transmission ratio between the second drive wheel (8b) and the spindle nut (9b).
  7. The pressing device (1) according to one of the preceding claims, characterized in that the transmission ratio between the first drive wheel (8a) and the spindle wheel (8b) is between 1:2 and 1:10, in particular at 1:5.13, and that the transmission ratio between the second drive wheel (9a) and the spindle nut (9b) is between 1% and 50%, in particular by 9%, higher than between the first drive wheel and the spindle wheel.
  8. The pressing device (1) according to one of the preceding claims, characterized in that the pressing device (1) further comprises a support structure (12), wherein at a bearing point (13) of the support structure (12) the first drive wheel (8a) and the spindle wheel (8b) are rotatably mounted, and wherein at another bearing point (14) in the support structure (12) the second drive wheel (9a) and the spindle nut (9b) are rotatably mounted.
  9. The pressing device (1) according to one of the preceding claims, characterized in that the rotationally fixed and longitudinally displaceable connection between the spindle wheel (8b) and the spindle (5) is provided by a splined shaft connection, in particular by a multi-splined shaft connection, or by a polygonal shaft connection.
  10. The pressing device (1) according to one of the preceding claims, characterized in that the spindle (5) is connected to the pressing piston (6) via an axial bearing (15).
  11. The pressing device (1) according to one of the preceding claims, characterized in that the first drive wheel (8a) and the second drive wheel (9a) are axially offset with respect to the center axis (M) of the spindle (5).
  12. The pressing device (1) according to one of the preceding claims, characterized in that the pitch of the spindle is in the range from 1.5 to 10, in particular from 5 to 7, millimeters and/or that the spindle and the spindle nut are designed as a ball screw drive.
  13. The pressing device (1) according to one of the preceding claims, characterized in that the pressing piston (6) has a pair of rollers (16) on the front side, which can be moved against a pressing tool fastened in the tool holder (7).
  14. A pressing system comprising a pressing device (1) according to one of the preceding claims and a pressing tool inserted into the tool holder (7).
  15. The pressing system according to claim 14, characterized in that the pressing tool is a pressing jaw or a pressing sling.
EP21179007.6A 2021-06-11 2021-06-11 Pressing device and pressing system Active EP4101592B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP21179007.6A EP4101592B1 (en) 2021-06-11 2021-06-11 Pressing device and pressing system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP21179007.6A EP4101592B1 (en) 2021-06-11 2021-06-11 Pressing device and pressing system

Publications (2)

Publication Number Publication Date
EP4101592A1 EP4101592A1 (en) 2022-12-14
EP4101592B1 true EP4101592B1 (en) 2023-11-29

Family

ID=76392273

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21179007.6A Active EP4101592B1 (en) 2021-06-11 2021-06-11 Pressing device and pressing system

Country Status (1)

Country Link
EP (1) EP4101592B1 (en)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6240626B1 (en) * 1997-02-21 2001-06-05 Novopress Gmbh Pressen Und Presswerkzauge & Co. Kg Pressing device
DE29919604U1 (en) * 1999-11-09 2000-01-05 Karlsruhe Forschzent Feed gear for simultaneous drive and feed of a spindle
DE20305473U1 (en) 2003-04-03 2003-06-12 Novopress Gmbh Hand-driven press has a driver and a motor with a linear guide and linear drive

Also Published As

Publication number Publication date
EP4101592A1 (en) 2022-12-14

Similar Documents

Publication Publication Date Title
EP0097169A1 (en) Linear drive device with two motors.
DE112007002103B4 (en) Rolling element screw
DE2757739A1 (en) SELF-ENGAGING GEAR CLUTCH
WO2002066866A1 (en) Device for actuating the selector shaft of a manually shifted transmission
DE3444420A1 (en) Device for producing pivoting movements
DE102005034340B4 (en) Planetary gear and actuator for valves with a planetary gear
EP3208164A1 (en) Ball screw
EP4101592B1 (en) Pressing device and pressing system
EP0432349B1 (en) Transmission
DE3420918A1 (en) Twin-screw extruder
EP2295800A2 (en) Eccentric screw pump
EP3441613B1 (en) Hydrostatic gearwheel rotary piston machine
DE10256752B3 (en) Standard gearbox and kit
EP1741664B1 (en) Actuator for positioning a load
EP2180979B1 (en) Electric handheld power tool
WO2022112021A1 (en) Coupling mechanism
EP0679495B1 (en) Drive for a double-screw extruder
WO2022112010A1 (en) Spring element and coupling device
EP1568916B1 (en) Transmission with exchangeable gears
DE10100990B4 (en) Device for expanding pipes
DE19654896A1 (en) Gear drive transmission for motor vehicle - has driven gearwheel with teeth inclined in same direction as drive gearwheel and at least two gear branches
DE10002798B4 (en) Gearbox with rolling elements
DE102020114804B4 (en) Steering system for an outboard motor
DE112013002735T5 (en) Connecting structure of a rotation axis and this comprehensive ship
EP4012227B1 (en) Linear drive

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN PUBLISHED

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

17P Request for examination filed

Effective date: 20230322

RBV Designated contracting states (corrected)

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: GRANT OF PATENT IS INTENDED

RIC1 Information provided on ipc code assigned before grant

Ipc: B25B 27/10 20060101AFI20230623BHEP

INTG Intention to grant announced

Effective date: 20230719

P01 Opt-out of the competence of the unified patent court (upc) registered

Effective date: 20230901

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE PATENT HAS BEEN GRANTED

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 502021002055

Country of ref document: DE

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: LANGUAGE OF EP DOCUMENT: GERMAN

REG Reference to a national code

Ref country code: LT

Ref legal event code: MG9D

REG Reference to a national code

Ref country code: NL

Ref legal event code: MP

Effective date: 20231129

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20240301

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20240329

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20231129

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20231129

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20231129

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20240329

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20240301

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20231129

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20240229

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20231129

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20231129

Ref country code: RS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20231129

Ref country code: PL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20231129

Ref country code: NO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20240229

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20231129

Ref country code: LV

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20231129

Ref country code: HR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20231129