EP2898233A1 - Linear unit and method for the manufacture of a linear unit - Google Patents

Linear unit and method for the manufacture of a linear unit

Info

Publication number
EP2898233A1
EP2898233A1 EP13759736.5A EP13759736A EP2898233A1 EP 2898233 A1 EP2898233 A1 EP 2898233A1 EP 13759736 A EP13759736 A EP 13759736A EP 2898233 A1 EP2898233 A1 EP 2898233A1
Authority
EP
European Patent Office
Prior art keywords
transmission member
linear unit
threaded nut
power transmission
threaded
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.)
Withdrawn
Application number
EP13759736.5A
Other languages
German (de)
French (fr)
Inventor
Theo Baukholt
Johannes GÖRLACH
Pierre Schmitt
Kristijan Tarandek
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.)
Continental Teves AG and Co OHG
Original Assignee
Continental Teves AG and Co OHG
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 Continental Teves AG and Co OHG filed Critical Continental Teves AG and Co OHG
Publication of EP2898233A1 publication Critical patent/EP2898233A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
    • F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
    • F16H25/20—Screw mechanisms
    • F16H25/24—Elements essential to such mechanisms, e.g. screws, nuts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D1/00—Couplings for rigidly connecting two coaxial shafts or other movable machine elements
    • F16D1/02—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for connecting two abutting shafts or the like
    • F16D1/027—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for connecting two abutting shafts or the like non-disconnectable, e.g. involving gluing, welding or the like
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D1/00—Couplings for rigidly connecting two coaxial shafts or other movable machine elements
    • F16D1/06—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end
    • F16D1/064—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end non-disconnectable
    • F16D1/072—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end non-disconnectable involving plastic deformation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D65/00—Parts or details
    • F16D65/14—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D23/00—Details of mechanically-actuated clutches not specific for one distinct type
    • F16D23/12—Mechanical clutch-actuating mechanisms arranged outside the clutch as such
    • F16D2023/123—Clutch actuation by cams, ramps or ball-screw mechanisms
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2125/00—Components of actuators
    • F16D2125/18—Mechanical mechanisms
    • F16D2125/20—Mechanical mechanisms converting rotation to linear movement or vice versa
    • F16D2125/34—Mechanical mechanisms converting rotation to linear movement or vice versa acting in the direction of the axis of rotation
    • F16D2125/40—Screw-and-nut
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
    • F16F15/32—Correcting- or balancing-weights or equivalent means for balancing rotating bodies, e.g. vehicle wheels
    • F16F15/324—Correcting- or balancing-weights or equivalent means for balancing rotating bodies, e.g. vehicle wheels the rotating body being a vehicle wheel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
    • F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
    • F16H25/20—Screw mechanisms
    • F16H25/24—Elements essential to such mechanisms, e.g. screws, nuts
    • F16H2025/2481—Special features for facilitating the manufacturing of spindles, nuts, or sleeves of screw devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
    • F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
    • F16H25/20—Screw mechanisms
    • F16H25/22—Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members
    • F16H25/2204—Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members with balls
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/49908—Joining by deforming
    • Y10T29/49936—Surface interlocking
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/18—Mechanical movements
    • Y10T74/18568—Reciprocating or oscillating to or from alternating rotary
    • Y10T74/18576—Reciprocating or oscillating to or from alternating rotary including screw and nut

Definitions

  • the invention relates to a linear unit for applying an axially acting force with a rotational-translation gear, in particular a ball screw, which has a threaded spindle and a threaded nut, and a
  • Power transmission element which is designed in particular as a push rod or pressure tube. It further relates to a method for producing such a linear unit.
  • Aforesaid linear units are used in particular in the "active" braking systems in which braking pressure can be built up independently of, or as support for the driver's braking operation.
  • a linear unit converts present at ⁇ play a rotational movement of a threaded spindle into a translational movement of a nut The resulting. Stroke of the threaded nut can then be used to move a piston and thereby, in particular hydraulically, to build up brake pressure in one or more brake circuits
  • the spindle can be connected to the shaft of an electric motor which is controlled by an electronic control unit (ECU).
  • ECU electronice control unit
  • the linear units described above are known, for example, from DE 10 2009 019 209 A1 or DE 10 2010 039 916 A1.
  • a brake system for motor vehicles which as pressure supply device comprises a hydraulic cylinder-piston arrangement, the piston of an electric motor with the interposition of a
  • Rotation-translation gear is actuated.
  • the system pressure is built up by this linear actuator.
  • the invention is therefore an object of the invention to improve a linear ⁇ unit for a brake system for motor vehicles to the effect that for their production fewer components than previously necessary and the installation of the linear unit is kept as simple as possible. Furthermore, a corresponding
  • Manufacturing process can be specified.
  • this object is achieved in that the threaded nut and the force transmission member by a positive, in particular backlash-free connection,
  • Constructions of linear units have various disadvantages. First, they have a plurality of components to be joined together. On the other hand, this makes several connections between these components necessary, whereby the construction
  • connection between the nut and the force transmission member should be stable and reliable and be able to withstand long-lasting high lifting loads. As has now been recognized, these requirements can be satisfied by a positive connection between the threaded nut and the power transmission member. The two components are thus connected directly and directly positively. This compound thus serves the rigid coupling of the axial movement of the nut and power transmission member.
  • connection between the threaded nut and the force transmission member is preferably formed without play. In this way, a particularly precise method of a piston connected to the power transmission member is made possible. In addition, material wear by moving and possibly rubbing the two components against each other are avoided.
  • Force transmission member is preferably carried out by clinching or clinching. It is created by widths and / or
  • the form-fit connection can also be performed by caulking, whereby in particular the operating power is ⁇ supply membered plastically deformed.
  • the threaded spindle is driven by a Elekt ⁇ romotor with a rotor and a stator, wherein the threaded nut is not rotatably mounted. In other words, the nut is prevented by its storage from turning with the rotation of the spindle. This ensures that the mother exclusively in the axial direction, ie in
  • the rotor of the electric motor or a shaft connected thereto is preferably rigidly and non-rotatably connected directly to the spindle.
  • the electric motor is preferably controlled by a control and regulating unit (ECU) as needed for pressure build-up and / or pressure reduction.
  • ECU control and regulating unit
  • the linear unit is designed as a hydraulic actuator or a hydraulic pressure source.
  • the force transmission member is particularly preferably mechanically connected to a piston.
  • the piston particularly preferably limits a pressure medium-filled pressure chamber in a bore.
  • the piston is particularly preferred as a hydraulic piston a
  • the linear unit can also be used in an electro-mechanical brake system.
  • the piston would directly press a brake pad against a brake disc, in which case the electric motor would also be controlled by a control and regulation unit.
  • the threaded nut preferably comprises, in particular in a region facing the force transmission member, a groove. Such a configuration allows in particular during clinching, but also when caulking, the formation of a positive connection by the softer material of the.
  • Power transmission member flows into the groove or is pressed. In this area, the force transmission member is prevented by the material surrounding the groove of the threaded nut on a movement in the axial direction, resulting in the positive connection.
  • the power transmission member is preferably designed as a profile tube from ⁇ .
  • a smooth on its surface ausgestaltetes tube could be caused by the rotational movement
  • the threaded nut is preferably supported on the operating power supply ⁇ membered, particularly preferably by a form-fitting support, against rotation from. By such a structural configuration, a rotation of the threaded nut is locked relative to the power transmission member.
  • Power transmission member is then both in the axial and in the radial direction with the threaded nut in positive engagement, whereby a particularly stable connection is achieved.
  • This torsional security is advantageously characterized ⁇ it sufficient that on the threaded nut, in particular in a Fü ⁇ area between the nut and power transmission member, formations, in particular in the form of knurling or toothing, are arranged.
  • the force transmission member or its material fills in the production of the positive connection of threaded nut and force transmission member, in particular the clinching, the region of the form-fitting form fit.
  • the positive connection in the radial direction thus arises because during the joining process the softer material of the
  • Power transmission element flows in these formations.
  • the advantages of the invention are in particular that by a positive connection of threaded nut and
  • Power transmission member no additional components, such as a sleeve, are required. By dispensing with an additional component on the one hand costs are saved. On the other hand, the space required for the linear unit is reduced by the compact design.
  • Force / distance relationship indicates a properly performed clinching.
  • the force transmission member which is preferably designed as a profile tube, results in a simple shape. It can be manufactured, for example, as an extruded profile with end machining on a lathe.
  • Geometry on the threaded nut can be made by forming with low turning to form a groove.
  • the proposed combination of spindle and nut makes a simple, stable and very good in the manufacturing process
  • FIG. 1 shows a section of a first embodiment of a linear unit according to the invention
  • FIG. 2 is a longitudinal section through the linear unit according to
  • FIG. 1, FIG. 3 shows a detail of a second embodiment of a linear unit according to the invention in one
  • FIG. 4 shows a section of a third exemplary embodiment of a linear unit according to the invention in one
  • FIG. 1 shows a detail of a first exemplary embodiment of a linear unit 7 according to the invention.
  • a rotational movement is generated by a ball screw or a
  • Rotation-translation gear 8 is converted into a translational Be ⁇ movement.
  • an unillustrated piston is moved, which causes a pressure build-up or pressure reduction.
  • the translational movement of the threaded nut 2 is thus transmitted to the power transmission element 3 and then to the hydraulic piston of the piston-cylinder arrangement.
  • the rotary-translation gear 8 and the ball screw is used to convert the rotational movement performed by the rotor of the electric motor in a translational movement of the
  • Power transmission member 3 which is required for actuating the piston of a piston-cylinder assembly.
  • the ball screw has a threaded spindle 1, one with the
  • Threaded spindle 1 engaged threaded nut 2 and a plurality of arranged between them or running balls (not shown), the z. B. in helical grooves 10 are guided on the surface of the threaded spindle 1. Together with corresponding opposing grooves 11 in the
  • Threaded nut 2 become helical channels in this way 12 are formed, in which the balls run.
  • return ducts 13 are provided.
  • the linear unit 7 is formed in the present embodiment as a hydraulic actuator or a hydraulic pressure source with a piston.
  • the piston defines a pressure medium-filled pressure chamber in a bore or is a hydraulic piston of a cylinder-piston arrangement
  • another rotation-translation gear 8 such as a simple movement thread or a Rol ⁇ lengewindetrieb be used.
  • Hydraulic pressure is built up over a
  • a hydraulic brake system a For example, a hydraulic brake system a
  • the torque of the motor acts on the spindle or Ge ⁇ threaded spindle 1.
  • the reaction torque must be supported (it must be prevented that upon rotation of the threaded spindle 1 and the threaded nut rotatory sets in motion) and the axial force be transferred to the piston. Both are achieved by a force transmission member 3, which is presently designed as a profile tube, which connects the threaded nut 2 and the piston with each other.
  • the profile tube is in this case made of an extruded profile.
  • linear unit 7 is dispensed with additional components for the connection of threaded nut 2 and power transmission member 3. Instead, these two parts are directly connected by a clinching process.
  • a radially encircling groove 4 shown in the joining by applying a
  • Axial forces within limits bending moments, and can transmit the reaction torque.
  • the profile tube consists of a softer material than the threaded nut 2, so that the softer material flows into the groove 4 of the threaded nut 2 during the joining process, while substantially maintaining the shape of the groove 4.
  • the threaded nut 2 are made of steel and designed as a profile tube power transmission member 3 made of aluminum.
  • the force transmitting member 3 is in one of the nut 2 to ⁇ facing portion (not shown in FIGS. 1 to 4) with respect to a housing of the linear unit axially movably guided and secured against rotation.
  • the profile tube is mechanically fastened to the piston such that neither a relative axial movement nor a rotation of the two components is possible.
  • a linear unit 7 is in the joining region of the two components (threaded nut 2 and force transmission member 3) in addition a positive support against rotation intended.
  • the support is formed by knurls on the nut, ie on the threaded nut 2 9 extending formations 5 are arranged in an axial direction.
  • the threaded nut 2 is thus knurled so here.
  • the profile tube 3 fills this area when clinching with material form fit.
  • this geometry is introduced by forming on the threaded nut 2; the profile tube is rotationally symmetrical prior to staking.
  • the off ⁇ deformations 5 are arranged on the nut in the region of the groove 4, in the third embodiment of FIG. 4, the formations 5 are arranged on the nut 2 in an electric motor-side stop region 6 for the profile tube (see also FIG.
  • the threaded nut 2 can also be rolled in these areas alternatively. Furthermore, as an alternative to the torque support by a classical form fit, z. B. a nose on the profile tube and a pocket on the mother done, in which case the processing of the two components appears more complex. As an alternative to formations, a polygon can also be provided on the nut.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transmission Devices (AREA)

Abstract

It is the intention for a linear unit (7) for imparting an axially acting force, having a rotational-translational gear (8), in particular a ball screw, which has a threaded spindle (1) and a threaded nut (2), and having a force transmission element (3), which is in particular in the form of a thrust rod or thrust tube, to be improved such that fewer components are required and the assembly of the linear unit is kept as simple as possible. For this purpose, the threaded nut (2) and the force transmission element (3) are connected to one another by means of a positively locking, in particular play-free connection, in particular by means of clinching.

Description

Lineareinheit sowie Verfahren zur Herstellung einer Lineareinheit Linear unit and method for producing a linear unit
Die Erfindung betrifft eine Lineareinheit zum Aufbringen einer axial wirkenden Kraft mit einem Rotations-Translationsgetriebe, insbesondere einem Kugelgewindetrieb, das eine Gewindespindel sowie eine Gewindemutter aufweist, und einem The invention relates to a linear unit for applying an axially acting force with a rotational-translation gear, in particular a ball screw, which has a threaded spindle and a threaded nut, and a
Kraftübertragungsglied, welches insbesondere als Druckstange oder Druckrohr ausgebildet ist. Sie betrifft weiterhin ein Verfahren zur Herstellung einer derartigen Lineareinheit.  Power transmission element, which is designed in particular as a push rod or pressure tube. It further relates to a method for producing such a linear unit.
Oben genannte Lineareinheiten werden insbesondere in „aktiven" Bremssystemen eingesetzt, in denen unabhängig von oder unterstützend zu der Bremsbetätigung des Fahrers Bremsdruck aufgebaut werden kann. Eine Lineareinheit wandelt dabei bei¬ spielsweise eine rotatorische Bewegung einer Gewindespindel in eine translatorische Bewegung einer Gewindemutter. Der dadurch entstehende Hub der Gewindemutter kann dann dazu genutzt werden, einen Kolben zu bewegen und dadurch, insbesondere hydraulisch, Bremsdruck in einem oder mehreren Bremskreisen aufzubauen. Die Spindel kann dabei mit der Welle eines Elektromotors verbunden sein, welcher von einer elektronischen Steuer- und Regeleinheit (ECU) zum Druckaufbau und/oder -abbau angesteuert wird. Oben beschriebene Lineareinheiten sind beispielsweise aus der DE 10 2009 019 209 AI oder der DE 10 2010 039 916 AI bekannt. Aforesaid linear units are used in particular in the "active" braking systems in which braking pressure can be built up independently of, or as support for the driver's braking operation. A linear unit converts present at ¬ play a rotational movement of a threaded spindle into a translational movement of a nut The resulting. Stroke of the threaded nut can then be used to move a piston and thereby, in particular hydraulically, to build up brake pressure in one or more brake circuits The spindle can be connected to the shaft of an electric motor which is controlled by an electronic control unit (ECU). The linear units described above are known, for example, from DE 10 2009 019 209 A1 or DE 10 2010 039 916 A1.
Aus der WO 2011/029812 ist eine Bremsanlage für Kraftfahrzeuge bekannt, welche als Druckbereitstellungseinrichtung eine hydraulische Zylinder-Kolben-Anordnung umfasst, deren Kolben von einem Elektromotor unter Zwischenschaltung eines From WO 2011/029812 a brake system for motor vehicles is known, which as pressure supply device comprises a hydraulic cylinder-piston arrangement, the piston of an electric motor with the interposition of a
Rotations-Translationsgetriebes betätigbar ist. In der „Brake-by-wire"-Betriebsart wird der Systemdruck durch diesen Linearaktuator aufgebaut. ^ Rotation-translation gear is actuated. In the "brake-by-wire" mode, the system pressure is built up by this linear actuator. ^
Es sind technische Ausgestaltungen von Lineareinheiten bekannt, bei denen die Mutter über einen Adapter bzw. eine Hülse mit dem Profilrohr verbunden wird, wobei die Verbindung zwischen Hülse und Mutter gelasert und die Verbindung zwischen Profilrohr und Hülse verstemmt wird. Bei dem vorbekannten Aufbau sind also mehrere Bauteile und Verbindungen notwendig, um das Profilrohr und die Mutter miteinander zu verbinden. There are technical refinements of linear units are known in which the mother is connected via an adapter or a sleeve with the profile tube, wherein the connection between the sleeve and nut lasered and the connection between the profile tube and sleeve is caulked. In the prior art construction so several components and connections are necessary to connect the profile tube and the mother together.
Der Erfindung liegt daher die Aufgabe zugrunde, eine Linear¬ einheit für eine Bremsanlage für Kraftfahrzeuge dahin gehend zu verbessern, dass zu ihrer Herstellung weniger Bauteile als bisher notwendig sind und die Montage der Lineareinheit möglichst einfach gehalten ist. Weiterhin soll ein entsprechendes The invention is therefore an object of the invention to improve a linear ¬ unit for a brake system for motor vehicles to the effect that for their production fewer components than previously necessary and the installation of the linear unit is kept as simple as possible. Furthermore, a corresponding
Herstellungsverfahren angegeben werden. Manufacturing process can be specified.
In Bezug auf die Lineareinheit wird diese Aufgabe dadurch gelöst, dass die Gewindemutter und das Kraftübertragungsglied durch eine formschlüssige, insbesondere spielfreie, Verbindung, With regard to the linear unit, this object is achieved in that the threaded nut and the force transmission member by a positive, in particular backlash-free connection,
insbesondere durch Clinchen, miteinander verbunden sind. in particular by clinching, are connected together.
Weitere bevorzugte Ausführungsformen der Erfindung ergeben sich aus den Unteransprüchen und der nachfolgenden Beschreibung anhand von Figuren. Die Erfindung geht von der Überlegung aus, dass bekannteFurther preferred embodiments of the invention will become apparent from the subclaims and the following description with reference to figures. The invention is based on the consideration that known
Konstruktionen von Lineareinheiten diverse Nachteile aufweisen. Zum einen weisen sie mehrere miteinander zu verbindende Bauteile auf. Zum anderen werden dadurch mehrere Verbindungen zwischen diesen Bauteilen notwendig, wodurch die Konstruktion Constructions of linear units have various disadvantages. First, they have a plurality of components to be joined together. On the other hand, this makes several connections between these components necessary, whereby the construction
fehleranfällig werden kann. Die Verbindung zwischen Mutter und Kraftübertragungsglied sollte stabil und zuverlässig sein und dauerhaft hohe Hubbelastungen aushalten können. Wie nunmehr erkannt wurde, lässt sich diesen Anforderungen genügen durch eine formschlüssige Verbindung zwischen der Gewindemutter und dem Kraftübertragungsglied. Die beiden Komponenten werden also direkt und unmittelbar formschlüssig verbunden. Diese Verbindung dient damit der starren Kopplung der axialen Bewegung von Gewindemutter und Kraftübertragungsglied. error prone. The connection between the nut and the force transmission member should be stable and reliable and be able to withstand long-lasting high lifting loads. As has now been recognized, these requirements can be satisfied by a positive connection between the threaded nut and the power transmission member. The two components are thus connected directly and directly positively. This compound thus serves the rigid coupling of the axial movement of the nut and power transmission member.
Die Verbindung zwischen der Gewindemutter und dem Kraftübertragungsglied wird vorzugsweise spielfrei ausgebildet . Auf diese Weise wird ein besonders präzises Verfahren eines mit dem Kraftübertragungsglied verbundenen Kolbens ermöglicht. Zudem werden Materialabnutzungen durch Verschieben und gegebenenfalls Reiben der beiden Komponenten gegeneinander vermieden. Die formschlüssige Verbindung zwischen Gewindemutter undThe connection between the threaded nut and the force transmission member is preferably formed without play. In this way, a particularly precise method of a piston connected to the power transmission member is made possible. In addition, material wear by moving and possibly rubbing the two components against each other are avoided. The positive connection between threaded nut and
Kraftübertragungsglied erfolgt vorzugsweise durch Clinchen bzw. Durchsetzfügen. Dabei entsteht durch Breiten und/oder Force transmission member is preferably carried out by clinching or clinching. It is created by widths and / or
Fließpressen eine formschlüssige und nicht mehr lösbare Ver¬ bindung . Extrusion molding a positive and no longer releasable Ver ¬ bond.
Alternativ kann die formschlüssige Verbindung auch durch Verstemmen erfolgen, wobei insbesondere das Kraftübertra¬ gungsglied plastisch verformt wird. Vorteilhafterweise wird die Gewindespindel von einem Elekt¬ romotor mit einem Rotor und einem Stator angetrieben, wobei die Gewindemutter nicht drehbar gelagert ist. Mit anderen Worten, die Gewindemutter wird durch ihre Lagerung daran gehindert, sich bei der Rotation der Spindel mitzudrehen . Dadurch wird erreicht, dass sich die Mutter ausschließlich in axialer Richtung, also inAlternatively, the form-fit connection can also be performed by caulking, whereby in particular the operating power is ¬ supply membered plastically deformed. Advantageously, the threaded spindle is driven by a Elekt ¬ romotor with a rotor and a stator, wherein the threaded nut is not rotatably mounted. In other words, the nut is prevented by its storage from turning with the rotation of the spindle. This ensures that the mother exclusively in the axial direction, ie in
Richtung oder Gegenrichtung der Längsachse der Spindel (abhängig vom Drehsinn der Spindel) bewegt. Der Rotor des Elektromotors bzw. eine damit verbundene Welle ist dabei bevorzugt starr und verdrehsicher direkt mit der Spindel verbunden. Der Elektromotor wird dabei bevorzugt von einer Steuer- und Regeleinheit (ECU) bedarfsweise zum Druckaufbau und/oder Druckabbau angesteuert. Direction or opposite direction of the longitudinal axis of the spindle (depending on the direction of rotation of the spindle) moves. The rotor of the electric motor or a shaft connected thereto is preferably rigidly and non-rotatably connected directly to the spindle. The electric motor is preferably controlled by a control and regulating unit (ECU) as needed for pressure build-up and / or pressure reduction.
Bevorzugt ist die Lineareinheit als ein hydraulischer Aktuator oder eine hydraulische Druckquelle ausgebildet. Dabei ist das Kraftübertragungsglied besonders bevorzugt mit einem Kolben mechanisch verbunden. Der Kolben begrenzt besonders bevorzugt in einer Bohrung einen druckmittelgefüllten Druckraum. Der Kolben ist besonders bevorzugt als hydraulischer Kolben einer Preferably, the linear unit is designed as a hydraulic actuator or a hydraulic pressure source. In this case, the force transmission member is particularly preferably mechanically connected to a piston. The piston particularly preferably limits a pressure medium-filled pressure chamber in a bore. The piston is particularly preferred as a hydraulic piston a
Zylinder-Kolben-Anordnung ausgebildet . Cylinder-piston arrangement formed.
Die Lineareinheit kann alternativ dazu auch in einem elekt- romechanischen Bremssystem eingesetzt werden. Dazu würde dann bedarfsweise der Kolben direkt einen Bremsbelag gegen eine Bremsscheibe drücken, wobei auch hier der Elektromotor von einer Steuer- und Regeleinheit angesteuert würde. Alternatively, the linear unit can also be used in an electro-mechanical brake system. For this purpose, then, if necessary, the piston would directly press a brake pad against a brake disc, in which case the electric motor would also be controlled by a control and regulation unit.
Die Gewindemutter umfasst vorzugsweise, insbesondere in einem dem Kraftübertragungsglied zugewandten Bereich, eine Nut. Eine derartige Ausgestaltung erlaubt insbesondere beim Clinchen, aber auch beim Verstemmen, die Ausbildung einer formschlüssigen Verbindung, indem beim Zusammenfügen von Kraftübertragungsglied und Gewindemutter das weichere Material des The threaded nut preferably comprises, in particular in a region facing the force transmission member, a groove. Such a configuration allows in particular during clinching, but also when caulking, the formation of a positive connection by the softer material of the. When joining force transmission member and threaded nut
Kraftübertragungsgliedes in die Nut fließt bzw. gedrückt wird. In diesem Bereich wird das Kraftübertragungsglied durch das die Nut umgebende Material der Gewindemutter an einer Bewegung in axialer Richtung gehindert, wodurch sich der Formschluss ergibt.  Power transmission member flows into the groove or is pressed. In this area, the force transmission member is prevented by the material surrounding the groove of the threaded nut on a movement in the axial direction, resulting in the positive connection.
Das Kraftübertragungslied ist bevorzugt als Profilrohr aus¬ gestaltet. Ein an seiner Oberfläche glatt ausgestaltetes Rohr könnte das durch die rotatorische Bewegung entstehende The power transmission member is preferably designed as a profile tube from ¬ . A smooth on its surface ausgestaltetes tube could be caused by the rotational movement
Drehmoment nicht abstützen. Die Gewindemutter stützt sich bevorzugt am Kraftübertra¬ gungsglied, besonders bevorzugt durch eine formschlüssige Abstützung, gegen ein Verdrehen ab. Durch eine derartige konstruktive Ausgestaltung ist eine Verdrehung der Gewindemutter relativ zum Kraftübertragungsglied gesperrt. Das Do not support torque. The threaded nut is preferably supported on the operating power supply ¬ membered, particularly preferably by a form-fitting support, against rotation from. By such a structural configuration, a rotation of the threaded nut is locked relative to the power transmission member. The
Kraftübertragungsglied ist dann sowohl in axialer als auch in radialer Richtung mit der Gewindemutter in Formschluss, wodurch eine besonders stabile Verbindung erreicht wird. Diese Verdrehsicherheit wird vorteilhafterweise dadurch er¬ reicht, dass an der Gewindemutter, insbesondere in einem Fü¬ gebereich zwischen Gewindemutter und Kraftübertragungsglied, Ausformungen, insbesondere in Form einer Rändelung oder Zahnung, angeordnet sind. Power transmission member is then both in the axial and in the radial direction with the threaded nut in positive engagement, whereby a particularly stable connection is achieved. This torsional security is advantageously characterized ¬ it sufficient that on the threaded nut, in particular in a Fü ¬ area between the nut and power transmission member, formations, in particular in the form of knurling or toothing, are arranged.
Vorzugsweise füllt das Kraftübertragungsglied bzw. dessen Material bei der Herstellung der formschlüssigen Verbindung von Gewindemutter und Kraftübertragungsglied, insbesondere dem Clinchen, den Bereich der Ausformungen formschlüssig aus. Der Formschluss in radialer Richtung entsteht demnach dadurch, dass während des Fügeprozesses das weichere Material des Preferably, the force transmission member or its material fills in the production of the positive connection of threaded nut and force transmission member, in particular the clinching, the region of the form-fitting form fit. The positive connection in the radial direction thus arises because during the joining process the softer material of the
Kraftübertragungsgliedes in diese Ausformungen fließt. Power transmission element flows in these formations.
In Bezug auf das Verfahren zur Herstellung einer Lineareinheit wird die oben genannte Aufgabe dadurch gelöst, dass die With regard to the method for producing a linear unit, the above-mentioned object is achieved in that the
Gewindemutter und das Kraftübertragungsglied durch eine formschlüssige, insbesondere spielfreie, Verbindung, insbe¬ sondere durch Clinchen, verbunden werden. Die Vorteile der Erfindung liegen insbesondere darin, dass durch eine formschlüssige Verbindung von Gewindemutter und Threaded nut and the power transmission member by a positive, in particular backlash-free connection, in particular ¬ special be connected by clinching. The advantages of the invention are in particular that by a positive connection of threaded nut and
Kraftübertragungsglied keine Zusatzbauteile, wie beispielsweise eine Hülse, erforderlich sind. Durch den Verzicht auf ein zusätzliches Bauteil werden einerseits Kosten gespart. Andererseits wird durch die kompakte Bauweise auch der für die Lineareinheit benötigte Bauraum reduziert. Power transmission member no additional components, such as a sleeve, are required. By dispensing with an additional component on the one hand costs are saved. On the other hand, the space required for the linear unit is reduced by the compact design.
Für die Herstellung der Verbindung muss nur in axialer Richtung gefügt werden, wodurch sich eine besonders einfache Montage ergibt. Diese ist durch die Clinchkraft zudem gut überwachbar. Dies geschieht bevorzugt mit Hilfe eines Kraft/Weg-Diagrammes , in dem die Clinchkraft als Funktion des Weges, den beim Clinchen das Kraftübertragungsglied in Bezug auf die Mutter zurücklegt, sichtbar gemacht wird. In diesem Diagramm lässt sich ein bandartiger Bereich definieren, in dem der For the preparation of the compound must be joined only in the axial direction, resulting in a particularly simple assembly. This is also well monitored by the clinching force. This is preferably done by means of a force / displacement diagram in which the force of the force is visualized as a function of the distance that the force transmission member travels with respect to the nut during clinching. In this diagram, a band-like area can be defined in which the
Kraft/Weg-Zusammenhang auf einen ordnungsgemäß durchgeführten Clinchvorgang hindeutet. Für das Kraftübertragungsglied, welches bevorzugt als Profilrohr ausgestaltet ist, ergibt sich eine einfache Formgebung. Es kann beispielsweise als Strangpressprofil mit Endenbearbeitung an einer Drehmaschine gefertigt werden. Die  Force / distance relationship indicates a properly performed clinching. For the force transmission member, which is preferably designed as a profile tube, results in a simple shape. It can be manufactured, for example, as an extruded profile with end machining on a lathe. The
Geometrie an der Gewindemutter kann durch Umformen mit geringer Drehbearbeitung zur Formung einer Nut hergestellt werden. Durch die vorgeschlagene Verbindung von Spindel und Mutter wird eine einfache, stabile und im Fertigungsprozess sehr gut  Geometry on the threaded nut can be made by forming with low turning to form a groove. The proposed combination of spindle and nut makes a simple, stable and very good in the manufacturing process
beherrschbare Konfiguration geschaffen. Ein Ausführungsbeispiel der Erfindung wird anhand einer manageable configuration created. An embodiment of the invention will be described with reference to a
Zeichnung näher erläutert. Darin zeigen in stark schematischer Darstellung :  Drawing explained in more detail. In it show in a highly schematic representation:
FIG. 1 einen Ausschnitt eines ersten Ausführungsbeispiels einer erfindungsgemäßen Lineareinheit, FIG. 1 shows a section of a first embodiment of a linear unit according to the invention,
FIG. 2 einen Längsschnitt durch die Lineareinheit gemäß FIG. 2 is a longitudinal section through the linear unit according to
FIG. 1, FIG. 3 einen Ausschnitt eines zweiten Ausführungsbeispiels einer erfindungsgemäßen Lineareinheit in einemFIG. 1, FIG. 3 shows a detail of a second embodiment of a linear unit according to the invention in one
Längsschnitt, und Longitudinal section, and
FIG. 4 einen Ausschnitt eines dritten Ausführungsbeispiels einer erfindungsgemäßen Lineareinheit in einemFIG. 4 shows a section of a third exemplary embodiment of a linear unit according to the invention in one
Längsschnitt . Longitudinal section.
Gleiche Teile sind in allen Figuren mit denselben Bezugszeichen versehen. Identical parts are provided with the same reference numerals in all figures.
In FIG. 1 ist ein Ausschnitt eines ersten Ausführungsbeispiels einer erfindungsgemäßen Lineareinheit 7 dargestellt. Durch einen nicht dargestellten Elektromotor wird eine Drehbewegung erzeugt, die durch einen Kugelgewindetrieb bzw. ein In FIG. 1 shows a detail of a first exemplary embodiment of a linear unit 7 according to the invention. By an electric motor, not shown, a rotational movement is generated by a ball screw or a
Rotations-Translationsgetriebe 8 in eine translatorische Be¬ wegung gewandelt wird. Durch diese Bewegung wird ein nicht dargestellter Kolben verschoben, der einen Druckaufbau bzw. Druckabbau bewirkt. Die translatorische Bewegung der Gewin- demutter 2 wird also an das Kraftübertragungsglied 3 und dann an den Hydraulikkolben der Kolben-Zylinderanordnung übertragen. Rotation-translation gear 8 is converted into a translational Be ¬ movement. By this movement, an unillustrated piston is moved, which causes a pressure build-up or pressure reduction. The translational movement of the threaded nut 2 is thus transmitted to the power transmission element 3 and then to the hydraulic piston of the piston-cylinder arrangement.
Das Rotations-Translationsgetriebe 8 bzw. der Kugelgewindetrieb dient der Umwandlung der vom Rotor des Elektromotors ausgeführten Drehbewegung in eine translatorische Bewegung des The rotary-translation gear 8 and the ball screw is used to convert the rotational movement performed by the rotor of the electric motor in a translational movement of the
Kraftübertragungsgliedes 3, die zur Betätigung des Kolbens einer Kolben-Zylinder-Anordnung erforderlich ist. Dabei weist der Kugelgewindetrieb eine Gewindespindel 1, eine mit der  Power transmission member 3, which is required for actuating the piston of a piston-cylinder assembly. In this case, the ball screw has a threaded spindle 1, one with the
Gewindespindel 1 in Eingriff stehende Gewindemutter 2 sowie mehrere zwischen ihnen angeordnete bzw. laufende Kugeln (nicht dargestellt) auf, die z. B. in schraubenlinienförmigen Rillen 10 auf der Oberfläche der Gewindespindel 1 geführt werden. Gemeinsam mit entsprechenden gegenüberliegenden Rillen 11 in der Threaded spindle 1 engaged threaded nut 2 and a plurality of arranged between them or running balls (not shown), the z. B. in helical grooves 10 are guided on the surface of the threaded spindle 1. Together with corresponding opposing grooves 11 in the
Gewindemutter 2 werden auf diese Weise schraubenförmige Kanäle 12 gebildet, in welchen die Kugeln laufen. Zur Rückführung der Kugeln sind Rückführungskanale 13 vorgesehen. Threaded nut 2 become helical channels in this way 12 are formed, in which the balls run. For returning the balls return ducts 13 are provided.
Die Lineareinheit 7 ist im vorliegenden Ausführungsbeispiel als ein hydraulischer Aktuator oder eine hydraulische Druckquelle mit einem Kolben ausgebildet. Der Kolben begrenzt in einer Bohrung einen druckmittelgefüllten Druckraum bzw. ist als hydraulischer Kolben einer Zylinder-Kolben-Anordnung The linear unit 7 is formed in the present embodiment as a hydraulic actuator or a hydraulic pressure source with a piston. The piston defines a pressure medium-filled pressure chamber in a bore or is a hydraulic piston of a cylinder-piston arrangement
ausgebildet. Anstelle des dargestellten Kugelgewindetriebs kann auch ein anderes Rotations-Translationsgetriebe 8, wie beispielsweise ein einfaches Bewegungsgewinde oder ein Rol¬ lengewindetrieb, eingesetzt werden. educated. Instead of the illustrated ball screw, another rotation-translation gear 8, such as a simple movement thread or a Rol ¬ lengewindetrieb be used.
Bei einer Betätigung der Lineareinheit 7 bzw. einer Bestromung des Elektromotors wird der Rotor des Elektromotors in eineUpon actuation of the linear unit 7 or an energization of the electric motor, the rotor of the electric motor in a
Drehbewegung versetzt, die auf die Gewindespindel 1 übertragen wird. Durch die Rotationsbewegung der Gewindespindel 1 erfolgt eine Verschiebebewegung der Gewindemutter 2 in der FIG. 1 nach rechts, bei der das Kraftübertragungsglied 3 und damit der nicht dargestellte Kolben ebenfalls nach rechts verschoben werden, wodurch in einem vom Kolben begrenzten Druckraum ein Offset rotational movement, which is transmitted to the threaded spindle 1. By the rotational movement of the threaded spindle 1, a displacement movement of the threaded nut 2 takes place in the FIG. 1 to the right, in which the force transmission member 3 and thus the piston, not shown, are also displaced to the right, whereby in a pressure chamber bounded by the piston
hydraulischer Druck aufgebaut wird, der über einen Hydraulic pressure is built up over a
Druckanschluss an einen hydraulischen Verbraucher, Pressure connection to a hydraulic consumer,
beispielsweise eine hydraulische Bremsanlage eines For example, a hydraulic brake system a
Kraftfahrzeuges, weiter geleitet wird. Motor vehicle, is passed on.
Das Antriebsmoment des Motors wirkt auf die Spindel bzw. Ge¬ windespindel 1. An der Mutter bzw. Gewindemutter 2 müssen das Reaktionsmoment abgestützt (es muss verhindert werden, dass sich bei Rotation der Gewindespindel 1 auch die Gewindemutter rotatorisch in Bewegung setzt) und die Axialkraft zum Kolben übertragen werden. Beides wird durch ein Kraftübertragungsglied 3, das vorliegend als ein Profilrohr ausgebildet ist, erreicht, welches die Gewindemutter 2 und den Kolben miteinander verbindet. Das Profilrohr ist vorliegend aus einem Strangpressprofil hergestellt . The torque of the motor acts on the spindle or Ge ¬ threaded spindle 1. At the nut or threaded nut 2, the reaction torque must be supported (it must be prevented that upon rotation of the threaded spindle 1 and the threaded nut rotatory sets in motion) and the axial force be transferred to the piston. Both are achieved by a force transmission member 3, which is presently designed as a profile tube, which connects the threaded nut 2 and the piston with each other. The profile tube is in this case made of an extruded profile.
Bei der dargestellten Lineareinheit 7 wird auf zusätzliche Bauteile für die Verbindung von Gewindemutter 2 und Kraftübertragungsglied 3 verzichtet. Stattdessen werden diese beiden Teile durch ein Clinchverfahren direkt miteinander verbunden. Dazu wird, wie in der Schnittdarstellung der FIG. 2 erkennbar ist, an der Gewindemutter 2 eine radial umlaufende Nut 4 dargestellt, in die beim Fügen durch Aufbringen einer In the illustrated linear unit 7 is dispensed with additional components for the connection of threaded nut 2 and power transmission member 3. Instead, these two parts are directly connected by a clinching process. For this purpose, as shown in the sectional view of FIG. 2 can be seen on the threaded nut 2, a radially encircling groove 4 shown in the joining by applying a
Einpresskraft Material des Profilrohrs 3 fließt. Dadurch entsteht eine formschlüssige Verbindung ohne Spiel, die  Pressing force material of the profile tube 3 flows. This creates a positive connection without play, the
Axialkräfte, in Grenzen Biegemomente, und das Reaktionsmoment übertragen kann. Axial forces, within limits bending moments, and can transmit the reaction torque.
Das Profilrohr besteht hierzu aus einem weicheren Material als die Gewindemutter 2, so dass beim Fügeprozess das weichere Material in die Nut 4 der Gewindemutter 2 fließt und dabei die Formgebung der Nut 4 im Wesentlichen erhalten bleibt. Vorliegend sind die Gewindemutter 2 aus Stahl und das als Profilrohr ausgebildete Kraftübertragungsglied 3 aus Aluminium gefertigt. For this purpose, the profile tube consists of a softer material than the threaded nut 2, so that the softer material flows into the groove 4 of the threaded nut 2 during the joining process, while substantially maintaining the shape of the groove 4. In the present case, the threaded nut 2 are made of steel and designed as a profile tube power transmission member 3 made of aluminum.
Das Kraftübertragungsglied 3 ist in einem der Mutter 2 abge¬ wandten Bereich (nicht dargestellt in den FIG. 1 bis 4) bezüglich eines Gehäuses der Lineareinheit axial beweglich und gegen ein Verdrehen gesichert geführt. Das Profilrohr ist derart mechanisch an dem Kolben befestigt, dass weder eine relative axiale Bewegung noch eine Verdrehung der beiden Komponenten möglich ist. The force transmitting member 3 is in one of the nut 2 abge ¬ facing portion (not shown in FIGS. 1 to 4) with respect to a housing of the linear unit axially movably guided and secured against rotation. The profile tube is mechanically fastened to the piston such that neither a relative axial movement nor a rotation of the two components is possible.
Gemäß den in FIG. 3 und 4 dargestellten Ausführungsbeispielen einer erfindungsgemäßen Lineareinheit 7 ist im Fügebereich der beiden Bauteile (Gewindemutter 2 und Kraftübertragungsglied 3) zusätzlich eine formschlüssige Abstützung gegen Verdrehen vorgesehen. Bei der in FIG. 3 in einem länglichen Schnitt dargestellten Ausführungsform wird die Abstützung durch Rändel an der Mutter gebildet, d. h. an der Gewindemutter 2 sind sich in einer Axialrichtung 9 erstreckende Ausformungen 5 angeordnet. Die Gewindemutter 2 ist vorliegend also gerändelt. Das Profilrohr 3 füllt diesen Bereich beim Clinchen mit Material formschlüssig aus. Vorteilhafterweise wird diese Geometrie durch Umformen an der Gewindemutter 2 eingebracht; das Profilrohr ist vor dem Ver- stemmen rotationssymmetrisch ausgebildet. According to the in FIG. 3 and 4 illustrated embodiments of a linear unit 7 according to the invention is in the joining region of the two components (threaded nut 2 and force transmission member 3) in addition a positive support against rotation intended. In the in FIG. 3 embodiment shown in an oblong section, the support is formed by knurls on the nut, ie on the threaded nut 2 9 extending formations 5 are arranged in an axial direction. The threaded nut 2 is thus knurled so here. The profile tube 3 fills this area when clinching with material form fit. Advantageously, this geometry is introduced by forming on the threaded nut 2; the profile tube is rotationally symmetrical prior to staking.
Bei dem zweiten Ausführungsbeispiel der FIG. 3 sind die Aus¬ formungen 5 im Bereich der Nut 4 an der Mutter angeordnet, bei dem dritten Ausführungsbeispiel der FIG. 4 sind die Ausformungen 5 an der Mutter 2 in einem elektromotorseitigen Anschlagsbereich 6 für das Profilrohr angeordnet (siehe auch FIG. 1) . In the second embodiment of FIG. 3 the off ¬ deformations 5 are arranged on the nut in the region of the groove 4, in the third embodiment of FIG. 4, the formations 5 are arranged on the nut 2 in an electric motor-side stop region 6 for the profile tube (see also FIG.
Die Gewindemutter 2 kann in diesen Bereichen auch alternativ rolliert sein. Weiterhin kann alternativ dazu die Momenten- abstützung auch durch einen klassischen Formschluss, z. B. eine Nase am Profilrohr und eine Tasche an der Mutter erfolgen, wobei hier die Bearbeitung der beiden Komponenten aufwändiger erscheint. Alternativ zu Ausformungen kann auch ein Vieleck an der Mutter vorgesehen sein. The threaded nut 2 can also be rolled in these areas alternatively. Furthermore, as an alternative to the torque support by a classical form fit, z. B. a nose on the profile tube and a pocket on the mother done, in which case the processing of the two components appears more complex. As an alternative to formations, a polygon can also be provided on the nut.
Bezugszeichenliste LIST OF REFERENCE NUMBERS
1 Gewindespindel 1 threaded spindle
2 Gewindemutter  2 threaded nut
3 Kraftübertragungsglied  3 power transmission element
4 Nut  4 groove
5 Ausformung  5 shaping
6 Anschlagsbereich  6 stop area
7 Lineareinheit  7 linear unit
8 Rotations-Translationsgetriebe 8 rotation-translation gear
9 Axialrichtung 9 axial direction
10 Rille  10 groove
11 Rille  11 groove
12 Kanal  12 channel
13 Rückführungskanal 13 return channel

Claims

Patentansprüche claims
1. Lineareinheit (7) zum Aufbringen einer axial wirkenden Kraft mit einem Rotations-Translationsgetriebe (8), insbesondere einem Kugelgewindetrieb, das eine Gewindespindel (1) sowie eine Gewindemutter (2) aufweist, und einem 1. Linear unit (7) for applying an axially acting force with a rotational-translation gear (8), in particular a ball screw having a threaded spindle (1) and a threaded nut (2), and a
Kraftübertragungsglied (3) , welche insbesondere als  Power transmission member (3), which in particular as
Druckstange oder Druckrohr ausgebildeten ist, dadurch gekennzeichnet, dass die Gewindemutter (2) und das  Pressure rod or pressure tube is formed, characterized in that the threaded nut (2) and the
Kraftübertragungsglied (3) durch eine formschlüssige, insbesondere spielfreie, Verbindung, insbesondere durch Clinchen, miteinander verbunden sind.  Power transmission member (3) by a positive, in particular play-free connection, in particular by clinching, are interconnected.
2. Lineareinheit (7) nach Anspruch 1, dadurch gekennzeichnet, dass die Gewindespindel (1) von einem Elektromotor mit einem2. Linear unit (7) according to claim 1, characterized in that the threaded spindle (1) by an electric motor with a
Rotor und einem Stator angetrieben wird und dass die Gewindemutter (2) nicht drehbar gelagert ist. Rotor and a stator is driven and that the threaded nut (2) is not rotatably mounted.
3. Lineareinheit (7) nach Anspruch 1 oder 2, dadurch ge- kennzeichnet, dass diese als ein hydraulischer Aktuator oder hydraulische Druckquelle ausgebildet ist, wobei das 3. Linear unit (7) according to claim 1 or 2, character- ized in that it is designed as a hydraulic actuator or hydraulic pressure source, wherein the
Kraftübertragungsglied (3) auf einen Kolben wirkt, der in einer Bohrung einen druckmittelgefüllten Druckraum begrenzt oder der als hydraulischer Kolben einer Zylin- der-Kolben-Anordnung ausgebildet ist.  Power transmission member (3) acts on a piston which limits a pressure fluid-filled pressure chamber in a bore or is designed as a hydraulic piston of a cylinder-piston assembly.
4. Lineareinheit (7) nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Gewindemutter (2), insbesondere in einem dem Kraftübertragungsglied (3) zugewandten Bereich, eine Nut (4) umfasst. 4. Linear unit (7) according to one of claims 1 to 3, characterized in that the threaded nut (2), in particular in a force transmission member (3) facing region, a groove (4).
5. Lineareinheit (7) nach Anspruch 4, dadurch gekennzeichnet, dass bei der Herstellung der formschlüssigen Verbindung von Gewindemutter (2) und Kraftübertragungsglied (3) Material des Kraftübertragungsglieds (3) in die Nut (4) eingedrückt wird . 5. linear unit (7) according to claim 4, characterized in that in the production of the positive connection of threaded nut (2) and power transmission member (3) material of the power transmission member (3) is pressed into the groove (4).
Lineareinheit (7) nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass das Kraftübertragungslied (3) als Profilrohr ausgestaltet ist. Linear unit (7) according to one of claims 1 to 5, characterized in that the force transmission member (3) is designed as a profile tube.
Lineareinheit (7) nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass die Gewindemutter (2) sich am Linear unit (7) according to one of claims 1 to 6, characterized in that the threaded nut (2) on
Kraftübertragungsglied (3) , insbesondere durch eine formschlüssige Abstützung, gegen ein Verdrehen abstützt. Power transmission member (3), in particular by a positive support, supported against rotation.
Lineareinheit (7) nach Anspruch 7, dadurch gekennzeichnet, dass an der Gewindemutter (2), insbesondere in einem Fügebereich zwischen Gewindemutter und Kraftübertragungsglied, Ausformungen (5) , insbesondere in Form einer Rändelung oder einer Zahnung, angeordnet sind. Linear unit (7) according to claim 7, characterized in that on the threaded nut (2), in particular in a joining region between the threaded nut and the force transmission member, formations (5), in particular in the form of a knurling or a toothing, are arranged.
Lineareinheit (7) nach Anspruch 8, dadurch gekennzeichnet, dass bei der Herstellung der formschlüssigen Verbindung von Gewindemutter (2) und Kraftübertragungsglied (3), Linear unit (7) according to claim 8, characterized in that in the production of the positive connection of threaded nut (2) and power transmission member (3),
insbesondere dem Clinchen, das Kraftübertragungsglied (3) den Bereich der Ausformungen (5) formschlüssig ausfüllt. in particular the clinching, the power transmission member (3) fills the region of the formations (5) in a form-fitting manner.
Verfahren zur Herstellung einer Lineareinheit (7), insbesondere nach einem der Ansprüche 1 bis 9, mit einem Rotations-Translationsgetriebe (8), insbesondere einem Kugelgewindetrieb, das eine Gewindespindel (1) sowie eine Gewindemutter (2) aufweist, und einem Kraftübertra¬ gungsglied (3) , dadurch gekennzeichnet, dass die Gewin¬ demutter (2) und das Kraftübertragungsglied (3) durch eine formschlüssige, insbesondere spielfreie, Verbindung, insbesondere durch Clinchen, verbunden werden. A method for producing a linear unit (7), in particular according to one of claims 1 to 9, with a rotational-translation gear (8), in particular a ball screw having a threaded spindle (1) and a threaded nut (2), and a Kraftübertra ¬ transmission member (3), characterized in that the threaded ¬ derutter (2) and the power transmission member (3) by a positive, in particular play-free connection, in particular by clinching, are connected.
EP13759736.5A 2012-09-18 2013-09-09 Linear unit and method for the manufacture of a linear unit Withdrawn EP2898233A1 (en)

Applications Claiming Priority (3)

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DE102012216674 2012-09-18
DE102013217161.7A DE102013217161A1 (en) 2012-09-18 2013-08-28 Linear unit and method for producing a linear unit
PCT/EP2013/068574 WO2014044563A1 (en) 2012-09-18 2013-09-09 Linear unit and method for the manufacture of a linear unit

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US (1) US9976638B2 (en)
EP (1) EP2898233A1 (en)
KR (1) KR20150056808A (en)
CN (1) CN104822956B (en)
DE (1) DE102013217161A1 (en)
WO (1) WO2014044563A1 (en)

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WO2014044563A1 (en) 2014-03-27
CN104822956B (en) 2019-10-18
KR20150056808A (en) 2015-05-27
DE102013217161A1 (en) 2014-03-20
US20150240923A1 (en) 2015-08-27
CN104822956A (en) 2015-08-05
US9976638B2 (en) 2018-05-22

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