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)

Applications Claiming Priority (3)

Publications (1)

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Citations (3)

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• 2013
  • 2013-08-28 DE DE102013217161.7A patent/DE102013217161A1/de active Pending
  • 2013-09-09 KR KR1020157009331A patent/KR20150056808A/ko not_active Application Discontinuation
  • 2013-09-09 US US14/428,785 patent/US9976638B2/en active Active
  • 2013-09-09 CN CN201380048197.XA patent/CN104822956B/zh active Active
  • 2013-09-09 EP EP13759736.5A patent/EP2898233A1/de not_active Withdrawn
  • 2013-09-09 WO PCT/EP2013/068574 patent/WO2014044563A1/de active Application Filing

Patent Citations (3)

Non-Patent Citations (1)

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