• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a steering system (1) comprising a motor (2) with a first pulley (5) and a ball screw drive (6) with a second pulley (7), wherein the first and the second pulley (5, 7) via a belt connected to each other. The first and / or the second pulley (5, 7) comprises / comprise an outer ring (12), an inner ring (13) and an intermediate ring (14), wherein the outer ring (12) vorzugswiese an outer toothing (1), the intermediate ring (14) in the radial direction between the outer ring (12) and the inner ring (13) is arranged and connected thereto, and the intermediate ring (14) consists at least partially of a rubber-elastic material.
    公开号:AT520920A4
    申请号:T50610/2018
    申请日:2018-07-16
    公开日:2019-09-15
    发明作者:
    申请人:Miba Sinter Austria Gmbh；
    IPC主号:
    专利说明:

    Summary
    The invention relates to a steering system (1) comprising a motor (2) with a first pulley (5) and a recirculating ball drive (6) with a second pulley (7), the first and the second pulley (5, 7) using a belt are interconnected. The first and / or the second pulley (5, 7) comprises an outer ring (12), an inner ring (13) and an intermediate ring (14), the outer ring (12) preferably having an external toothing (1), the intermediate ring (14) is arranged in the radial direction between the outer ring (12) and the inner ring (13) and is connected to them, and the intermediate ring (14) consists at least partially of a rubber-elastic material.
    Fig. 3/30
    N2018 / 14100 AT-00
    The invention relates to a steering system comprising a motor with a first pulley and a recirculating ball drive with a second pulley, the first and the second pulley being connected to one another by a belt.
    As is known, an auxiliary drive is used in power steering systems to reduce the force to be used for steering. In so-called EPS steering systems (Electric Power Steering steering systems), this is an electric drive. There are different types of EPS steering systems, namely a C-EPS system in which the servo unit is positioned in the steering train and transmits the rotary movement via a worm wheel, a P-EPS system in which the servo unit is arranged on the steering gear pinion and a second, separate one Drive pinion shaft via a worm wheel, and R-EPS system, in which the servo unit is positioned parallel or concentrically around the rack and the rotary movement is transmitted via a belt and a ball screw drive (also called ball screw drive). The present invention relates inter alia to the latter R-EPS system.
    Such an EPS steering system is e.g. Known from DE 10 2016 124 393 A1, which describes a steering system, comprising a motor, a steered shaft with a thread groove, the steered shaft being designed to move back and forth in an axial direction of the steered shaft, with a ball screw mechanism a cylindrical nut which is screwed onto the threaded groove via a plurality of balls, the ball screw mechanism being designed to provide the steered shaft with an axial force in accordance with the rotation of the nut, a speed reducer, with a driven one
    N2018 / 14100-AT-00/30
    Pulley fixed to an outer peripheral surface of the nut disposed inside the driven pulley, a driving pulley fixed to a rotating shaft of the motor so as to be rotatable together with the rotating shaft, and a belt that is around the driven pulley and the drive pulley is wound, a belt tension adjustment mechanism to adjust a tension of the belt, and a housing that houses the steered shaft, ball screw mechanism, speed reducer, and belt tension adjustment mechanism, the housing including a first housing part and a second housing part that in the Axial direction are lined up, sections of the first and second housing parts, which match each other and protrude in a direction perpendicular to the axial direction, form a speed reducer housing which receives a portion of the speed reducer, the speed reducer housing is provided in its outer wall with a through hole which axially passes through the outer wall, the belt tension adjusting mechanism includes a tension adjusting shaft, and a tension roller rotatably disposed around an outer peripheral surface of the tension adjusting shaft, the tension roller being adapted to abut against the belt, the voltage adjustment shaft includes a first end protruding through the through hole from the housing, a second end received in the housing, the second end being coaxial with the first end, and an eccentric cylindrical portion that is related to a central axis of the first and second ends is eccentric, the eccentric cylindrical portion is disposed between the first and second ends, and the tension adjustment shaft is configured to rotate about the central axis of the first and second ends.
    Lateral forces, caused among other things by axle loads, are absorbed in R-EPS steering systems by support disks or spring assemblies, which are used between the EPS housing and the bearing for the recirculating ball drive. The recirculating ball drive (KGT), including the nut, toothed lock washer and bearing, can “tip” against the electric motor that is permanently installed in the housing and provides the drive. So
    N2018 / 14100-AT-00/30, depending on the direction of rotation, the toothed belt tends to come into contact with either the collar of the large (KGT side) or that of the small pulley. Along with this, the belt must lengthen accordingly on the opposite edge. Vibrations occur on the belt. This subsequently leads to damage to the steering system.
    The present invention is based on the object of improving a steering system of the type mentioned at the outset.
    This object is achieved in the steering system in that the first and / or the second pulley comprises / comprise an outer ring, an inner ring and an intermediate ring, the outer ring preferably having an external toothing, the intermediate ring being arranged in the radial direction between the outer ring and the inner ring and is connected to these, and the intermediate ring is at least partially made of a rubber-elastic material.
    This steering system ensures that the recirculating ball drive is decoupled from the belt drive. Axial forces or tensioning no longer affect the belt run. The connection of the motor to the recirculating ball drive can thus be improved. The above-mentioned support disks or spring assemblies in the EPS steering system can thus be dispensed with, which enables a simpler assembly of the EPS steering system. It can also be used to improve the NHV behavior (noise, vibration, harshness) of the steering system. By improving the running accuracy or smooth running of the toothed belt, the risk of wear of the toothed belt can be further reduced.
    According to an embodiment variant of the steering system, it is preferably provided that the intermediate ring is arranged in the radial direction between a bearing seat surface and a contact surface of the second pulley on a recirculating ball nut. It is thus possible to form a press fit between the belt pulley and the recirculating ball nut, whereby the (powder metallurgical) manufacture of the belt pulley can be simplified by eliminating positive connections, drivers, etc. If necessary, the
    N2018 / 14100-AT-00/30 required maximum tolerances can also be achieved without turning, since the required overlap in connection with process-specific diameters and roundness deviations tends to have less influence on the deformation of the toothed washer and bearing than with a conventional press fit -Execution.
    According to another embodiment variant of the steering system, it can be provided that edges of the inner ring in the connection area between the inner ring and the intermediate ring and / or edges in the connection area between the outer ring and the intermediate ring are provided with a rounding. The advantage here is that the durability of the pulley can be improved.
    By forming round edges on the inner and / or outer ring, the point overloading of the connection area on the edges can be avoided. This means that the constantly changing pressure and tensile loads on the intermediate ring can be better absorbed by the intermediate ring. In addition, the notching effect of the edges can also be avoided. The rounding further increases the areas available for connecting the inner and outer rings to the intermediate ring, which can also improve the durability. The rounded edges also ensure that when the connecting element is flush with the axial end faces of the two ring elements, the intermediate ring radially encompasses the inner ring and / or the outer ring in the connecting area, which also better absorbs tensile and compressive loads on the gearwheel in the axial direction can be. As a side effect, the rounded edges have the advantage that the inner ring and the outer ring can be removed from the mold better if they are made from sintered materials.
    According to a further embodiment variant of the steering system it can be provided that the intermediate ring extends in the axial direction above the inner ring and / or outer ring and in the radial direction partially overlaps the inner ring and / or the outer ring. A further improvement in the connection of the intermediate ring with the inner or outer ring can thus be achieved
    N2018 / 14100-AT-00/30, which can subsequently further improve the fatigue strength of this connection.
    For the same reasons, it can further be provided that the inner ring has a recess on at least one axial end face and / or the outer ring has / have a recess on at least one axial end face and that the intermediate ring engages in the recess or the recesses. For the above reasons, edges of the recesses in the axial end faces are also provided with a rounding in accordance with one embodiment variant of the steering system.
    As an alternative or in addition to this, it can also be provided to improve the bond between the intermediate ring and the inner ring and / or the outer ring that the inner ring has / have a recess on at least one radial surface and / or the outer ring has / have a recess on at least one radial surface that the intermediate ring engages in the recess or the recesses, it being again preferred according to an embodiment variant of the steering system if edges of the recesses in the radial surfaces are also provided with a rounding.
    The intermediate ring is preferably vulcanized onto the inner ring and / or the outer ring or pressed with the inner ring and / or outer ring, since a relatively high connection strength between the components can thus easily be achieved. In addition, the rounding in the area of the rounded edges in the connecting element can be shaped more completely and more precisely.
    For a better understanding of the invention, this will be explained in more detail with reference to the following figures.
    Each shows in a simplified, schematic representation:
    Figure 1 shows a section of a steering system in an oblique view.
    FIG. 2 shows the steering system according to FIG. 1 in a side view;
    3 shows a section through a pulley in an oblique view.
    N2018 / 14100-AT-00/30
    4 shows a detail from a further embodiment variant of the pulley in cross section;
    5 shows a detail from another embodiment variant of the pulley in cross section;
    6 shows a detail from a further embodiment variant of the pulley in cross section;
    7 shows a detail from a further embodiment variant of the pulley in cross section;
    8 shows a detail from a further embodiment variant of the pulley in cross section;
    Fig. 9 shows a section of a further embodiment of the pulley in cross section.
    In the introduction, it should be noted that in the differently described embodiments, the same parts are provided with the same reference numerals or the same component names, and the disclosures contained in the entire description can be applied analogously to the same parts with the same reference numerals or the same component names. The location information selected in the description, e.g. above, below, to the side, etc., referring to the figure described and illustrated immediately, and if the position is changed, these are to be applied accordingly to the new position.
    1 and 2, a section of a steering system 1, in particular an EPS steering system 1, is shown in an oblique view or in a sectional side view. These two figures only show the details that are relevant in relation to the description of the invention, since such steering systems are already known from the prior art and are described in detail therein. Reference is therefore made to further details of these steering systems in relation to the relevant prior art.
    N2018 / 14100-AT-00/30
    The steering system 1 comprises a motor 2, which is only indicated in the figures and which is in particular an electric motor. The motor 2 has a shaft 3, which can be mounted with at least one bearing 4. A first pulley 5 (also referred to as a pulley), the so-called small pulley 5, is arranged on this shaft 3 and non-rotatably connected to it. The first pulley 5 is thus the driving pulley 5 of the steering system 1.
    The bearing 4 is shown as a roller bearing, in particular a ball bearing. The bearing 4 can also be a plain bearing.
    The rotationally fixed connection between the first pulley 5 and the shaft 3 can be produced using known methods and can be designed to be form-fitting and / or force-fitting and / or material-fitting.
    The steering system 1 also has a recirculating ball drive 6, only indicated in FIGS. 1 and 2, with a second pulley 7 (also known as a pulley), the so-called large pulley 7.
    The second pulley 7 is rotatably connected to the ball screw nut of the ball screw 6. The rotationally fixed connection between the second pulley 7 and the recirculating ball nut can be produced using known methods and can be designed to be positive and / or non-positive and / or material. In particular, a press fit can be formed between the second pulley 7 and the recirculating ball nut.
    The ball screw 6 is arranged on a second shaft 8 (the ball screw).
    The first pulley 5 is coupled to the second pulley 7 via a belt, that is to say it is connected. The belt is preferably designed as a toothed belt 9. Accordingly, the first pulley 5 and the second pulley 7 also preferably have external teeth 9 and external teeth 10, respectively.
    N2018 / 14100-AT-00/30
    The second pulley 7 is driven by the first pulley 5 via the belt. The second belt slide 7 is therefore the driven pulley 7 of the steering system 1.
    The shaft 3 rotating during a steering process by the motor 2 and thus the rotating first pulley 5 also sets the second pulley 7 into a rotational movement via the belt. This rotary movement is converted by the ball screw 6 into a linear movement of the shaft 8, as a result of which it moves back and forth and thus supports the handlebar during the steering movement, as is known per se.
    The second belt slide 7 can be seen better in FIG. 3, which shows a section through the second pulley 7 in an oblique view.
    The second pulley 7 has an outer ring 12, an inner ring 13 and an intermediate ring 14 or consists thereof.
    It should be pointed out that the geometry of the outer ring 12, the inner ring 13 and the intermediate ring 14 shown in FIG. 3 is preferred, but is not to be understood as limiting.
    The outer ring 12 and the inner ring 13 are preferably made of a metallic material, in particular steel. The outer ring 12 and the inner ring 13 are particularly preferably produced by a powder metallurgical process, preferably from a sintered steel powder. The outer ring 12 and / or the inner ring 13 can, however, also consist of another (metallic) material, wherein the outer ring 12 (per se) and / or the inner ring 13 (per se) can also consist of at least two different metallic materials.
    The intermediate ring 14 consists at least partially of a rubber-elastic material, for example of an (X) NBR ((carboxylated) acrylonitrile butadiene rubber), HNBR (hydrogenated nitrile rubber), a silicone rubber (VMQ), NR (natural rubber), EPDM ( Ethylene-propylene-diene rubber), CR (chloroprene N2018 / 14100-AT-00/30
    Rubber), SBR (styrene-butadiene rubber) etc., whereby here again material mixtures can be used.
    By "at least partially" it is meant that the intermediate ring 14 e.g. Stiffening elements, e.g. Fibers and / or threads, for example made of metal, plastic, natural fibers, etc., or rods, etc. can be embedded. However, the intermediate ring 14 preferably consists exclusively of a rubber-elastic material.
    The outer ring 12 is radially outer and the inner ring 13 is radially inner, i.e. arranged in the radial direction below the outer ring 12, and in particular concentrically to the outer ring 12. The intermediate ring 14 is arranged in the radial direction between the outer ring 12 and the inner ring 13.
    The outer ring 12 carries on an outer surface, i.e. a lateral surface, the above-mentioned external toothing 11. This can extend over the entire axial length of the second belt slide 7. However, a rim 15 projecting beyond the radially outer lateral surface is preferably formed, so that the external toothing 11 extends in particular from a first axial end face 16 to this rim 15. The rim 15 can also be arranged as a separate component on the outer ring 12 and connected to it.
    The outer ring 12 is connected to the inner ring 13 via the intermediate ring 14. To establish the connection, the intermediate ring 14 can be preformed and then connected to the outer ring 12 and the inner ring 13, for example by using an adhesive, such as e.g. an adhesive. In the preferred embodiment of the steering system 1, the intermediate ring 14 is vulcanized in a corresponding form onto the inner ring 13 and / or the outer ring 12, in particular hot vulcanized or pressed with the inner ring 12 and / or outer ring 13 (in particular according to a compression molding method) , If necessary, a primer or adhesive can be applied beforehand to the surfaces that are connected to the intermediate ring 14.
    N2018 / 14100-AT-00/30
    The connection of the intermediate ring 14 to the outer ring 12 and / or inner ring 13 can also be produced by means of a transfer molding process, an injection molding process or by means of an injection-stamping process.
    In principle, transitions from axial to radial surfaces of the outer ring 12 and / or the inner ring 12 in the region of the intermediate ring 14 can be formed with sharp edges. According to an embodiment variant of the steering system 1 (FIG. 1), however, it can be provided that axially outer edges 17, 18, i.e. the edges 17, 18 in the transition area from a radial surface 19 to axial end faces 20, 21 of the inner ring 13 and / or axially outer edges 22, 23, i.e. the edges 22, 23 in the transition area from a radial surface 24 to axial end faces 25, 26 of the outer ring 12 are rounded in order to achieve the effects mentioned above, that is to say provided with a rounding 27 to 30, as shown in FIG shows a section of an embodiment of the second pulley 7. Sintering chamfers can also be provided instead of the roundings.
    As an explanation, it should be noted that in the illustrated embodiment variant of the second pulley 7, the radial surface 19 is the radially outer lateral surface of the inner ring 13 and the radial surface 24 is the radially inner lateral surface of the outer ring 12, that is to say those surfaces of the outer and inner rings 12, 13, Assign each other in the assembled state of the second pulley 7.
    The radius of the curves 27 to 30 is preferably selected from a range from 0.1 mm to 2 mm, in particular from a range from 0.4 mm to 1.5 mm.
    It is possible that the radius of all curves 27 to 30 is the same. However, it is also possible for at least one of the curves 27 to 30 to have a different radius from the remaining curves 27 to 30. For example, the two curves 27, 28 of the inner ring 13 can have a larger radius than the two curves 29, 30 of the outer ring 12. However, it is also possible for the curves 27 and 29 to be in the region of one axial side of the
    N2018 / 14100-AT-00/30 second pulley 7, e.g. have a larger radius in the area of the axial end faces 20, 25, i.e. the curves 28 and 30 of the second axial side of the second pulley 7, i.e. in the area of the axial end faces 21, 26. With these design variants, i.e. the different design of the curves 27 to 30, a wide variety of load cases of the second pulley 7 in the axial and radial directions can be better taken into account.
    In the simplest case, the curves 27 to 30 are designed as partial circles, for example four-part circles, or elliptical. However, other designs of curves 27 to 30 are also possible.
    As can also be seen in particular from FIG. 4, according to a further embodiment variant of the steering system 1 (FIG. 1), the intermediate ring 14 can protrude axially beyond the outer ring 12 and the inner ring 13 and in the radial direction the outer ring 12 and / or the inner ring 13 partially overlap. The intermediate ring 14 can thus in particular have an at least approximately H-shaped or an H-shaped cross section.
    However, it is also possible for the intermediate ring 14 to be flush with the axial end faces 20, 21 of the inner ring 13 and / or flush with the axial end faces 25, 27 of the outer ring 12.
    It is also possible that the intermediate ring 14 extends only in the area of the axial end faces 20, 25 or only in the area of the axial end faces 21, 26 of the inner ring 13 and outer ring 12 in the axial direction over these surfaces and partially overlaps in the radial direction ,
    5 to 9 show details of further and possibly independent design variants of the steering system 1 (FIG. 1), the same reference numerals or component designations being used for the same parts as in the previous FIGS. 1 to 4. In order to avoid unnecessary repetitions, reference is made to the detailed description of these FIGS. 1 to 4.
    N2018 / 14100-AT-00/30
    As can be seen from FIG. 5, according to one embodiment variant of the second pulley 7, it can be provided that the inner ring 13 on the radial surface 19 has / have at least one recess 31 and / or the outer ring 12 on the radial surface 24 has a recess 32, wherein the intermediate ring 14 engages in the recess 30 or 31 or the recesses 30, 31.
    The recess 30 or 31 or the recesses 30, 31 can only be arranged in discrete areas over the outer circumference of the inner ring 13 and the inner circumference of the outer ring 12, it being understood that several of the discrete recesses 30, 31 can of course be provided, in particular uniformly distributed over the outer circumference of the inner ring 13 and the inner circumference of the outer ring 12. However, the recesses 30, 31 can also be designed as ring grooves.
    There is also the possibility that only an annular groove-shaped recess 30 and / or an annular groove-shaped recess 31 is or are provided. However, it is also possible to provide a plurality of annular groove-shaped recesses 30 and / or a plurality of annular groove-shaped recesses 31 in the axial direction next to one another and separately from one another in the radial surfaces 19 and 24. For example, the radial surface 19 or 24 can be at least approximately wave-shaped or the radial surfaces 19, 24 can be approximately wave-shaped or the radial surface 19 or 24 or the radial surfaces 19, 24 in the manner of a toothing with a plurality of side by side arranged annular groove-shaped recesses 30 and / or 31 may be formed.
    There is also the possibility of a combination of at least one discrete recess 30 with at least one annular groove-shaped recess 30 in the radial surface 19 and / or a discrete recess 31 with at least one annular groove-shaped recess 31 in the radial surface 24.
    For the reasons mentioned above, the edges of the recesses 30, 31 in the radial surfaces 19, 24 are preferably also rounded, as shown in FIG. 5.
    N2018 / 14100-AT-00/30
    As shown in FIG. 6, there is also the possibility that the transition regions between the radial surface 19 and the axial end surfaces 20, 21 of the inner ring 13 and / or the transition regions between the radial surface 24 and the axial end surfaces 25, 26 of the outer ring 12 are stepped is or are executed. In particular, all of these transition areas can be designed in stages. In other words, the curves 27 to 30 of the edges 17, 18 (FIG. 2) of the inner ring 13 and / or the edges 22, 23 (FIG. 2) of the outer ring 12 can each have curves 27, 28 or 29, 30 be provided that have a non-constant radius of curvature.
    It is possible that at least one of the curves 27 to 30, for example two or all four, a first positive radius area (outward-pointing rounding area), a subsequent negative radius area (inward-pointing rounding) and then a second positive radius area (after outside rounding area).
    At least one of the curves 27 to 30 can therefore be provided with an at least approximately wavy profile.
    With these designs, the connection between the intermediate ring 14 and the inner ring 13 and the outer ring 12 can also be improved.
    Furthermore, more than one step can be provided in the area of at least one of the curves 27 to 30, for example two steps or three steps, etc., on the inner ring 13 and / or on the outer ring 12.
    Both in the embodiment variant of the second pulley 7 according to FIG. 5 and in the embodiment variant of the second pulley 7 according to FIG. 6, it can be provided that the intermediate ring 14 is flush with the inner ring 13 and / or the outer ring 12 or over them in the axial direction is protruding and partially overlapping in the radial direction (shown in dashed lines in FIGS. 5 and 6), as was explained above.
    N2018 / 14100-AT-00/30
    7 shows a section of a further variant of the second pulley 7. It can be provided that the inner ring 13 on at least one of the axial end faces 20, 21 has at least one recess 33, 34 and / or the outer ring 12 on at least one of the axial End faces 25, 26 have a recess 35, 36, the intermediate ring 14 engaging in at least one of the recesses 33 to 36.
    The recesses 33 to 36 can only be arranged in discrete areas in the axial end faces 20, 21 of the inner ring 13 and the axial end faces 25, 26 of the outer ring 12, it being understood that several of the discrete recesses 33 to 36 can of course be provided, in particular uniformly distributed can be provided. In another embodiment variant, the recesses 33 to 36 are designed as ring grooves.
    There is also the possibility that only an annular groove-shaped recess 33, 34 and / or an annular groove-shaped recess 35, 36 is or are provided. However, it is also possible to provide a plurality of annular groove-shaped recesses 33, 34 and / or a plurality of annular groove-shaped recesses 35, 36 in the radial direction one above the other and separately from one another in the axial end faces 20, 21, 25, 26. For example, at least one of the axial end faces 20, 21, 25, 26 or the axial end faces 20, 21, 25, 26 can be approximately wavy or the axial end faces 20 and / or 21 and / or 25 and / or 26 or, at least in the area of the intermediate ring 14, the axial end faces 20, 21, 25, 26 can be designed in the manner of a toothing with a plurality of annular groove-shaped recesses 33 and / or 34 and / or 35 and / or 36 arranged next to one another.
    There is also the possibility of combining at least one discrete recess 33 to 36 with at least one annular groove-shaped recess 33 to 36 in the axial end faces 20, 21, 25, 26.
    According to a further embodiment variant, the edges of the recesses 33 to 36 are preferably in the axial for the reasons mentioned above
    N2018 / 14100-AT-00/30
    End faces 20, 21, 25, 26 are also provided with a curve, as shown in FIG. 7.
    All rounding radii of the edges of the individual design variants of the second pulley 7 can be selected from the areas mentioned above.
    To improve the connection, there is also the possibility that the at least one of the radial surfaces 19, 24 and / or at least one of the axial end surfaces 20, 21, 25, 26 is roughened at least in the region of the connection to the intermediate ring 14 , for example by (sand) blasting or by grinding, etc.
    However, it is also advantageous if, at least in the connection areas, open-pore sintered components are used for the inner ring 13 and / or the outer ring 12, since a kind of clawing between the intermediate ring 14 and the inner ring 13 and / or the outer ring 12 can also be achieved in this way ,
    It can furthermore be advantageous if at least the surfaces of the inner ring 13 and / or the outer ring 12 in the area of the connection to the intermediate ring 14 are subjected to a plasma pretreatment or plasma activation and / or a steam treatment with optionally subsequent blasting of the surface with a blasting agent, for example Bullets.
    8 is intended to illustrate that combinations of the design variants of the second pulley 7 are also possible. The inner ring 13 has the at least one recess 31, analogous to the embodiment variant according to FIG. 5. All the above statements relating to the inner ring 13 of the embodiment variant according to FIG. 5 can therefore be transferred to the embodiment variant according to FIG. 8 and express reference is made to this.
    The outer ring 12, on the other hand, is formed with at least one projection 31, similar to the embodiment variant of the second pulley 7 according to FIG. 6. This projection 37 extends over the radial inner surface 24 of the outer ring 12 in a projecting manner towards the inner ring 13. In particular, this is at least
    N2018 / 14100-AT-00/30 a projection 37 is formed as an annular web which, like the annular groove-shaped recess 31 in this and / or the other embodiment variants of the second pulley 7, is designed to extend over the entire circumference. The circumference is based on the surface 24 of the outer ring 12 with respect to the at least one projection 37 and on the surface 19 with regard to the at least one recess 31.
    There may also be more than one, in particular annular web-shaped projection 37 on the radially inner surface 24 of the outer ring 12. For example, two, three, four, etc. projections 37 which are arranged or formed next to one another and at a distance from one another in the axial direction of the second pulley 7.
    In addition, it is possible for the projection 37 or at least one of the plurality of projections 37 to be designed with at least one gradation 38 - viewed in the radial direction - as indicated by the broken line in FIG. 8. Likewise, alternatively or additionally, the at least one recess 31 of the first radially inner ring element 2 can be designed with a gradation 39, as is also shown in FIG.
    is shown in dashed lines. The latter can also be provided in all further variants of the second pulley 7.
    All edges of the at least one projection 37 can be provided with curves, the radius of curvature being able to be selected from the above-mentioned area.
    By arranging a plurality of projections 37 lying next to one another in the axial direction, an at least approximately wave-shaped or toothed configuration of the radially inner surface 24 can again be achieved, as has already been stated above.
    In the embodiment variant of the second pulley 7 shown in FIG. 8, the projection 37, viewed in the radial direction, is located exactly above the at least one recess 31. However, there is also the possibility that the at least one projection 37 is offset in the axial direction to the at least one
    N2018 / 14100-AT-00/30
    Recess 31 is arranged. In this case, it can be advantageous if a plurality of projections 37 are arranged, the at least one recess 31, viewed in the axial direction, being arranged between the projections 37.
    Of course, the reverse embodiment of the second pulley 7 is also possible within the scope of the invention, in which the at least one projection 37 is arranged or formed on the inner ring 13 and the at least one recess 31 on the outer ring 12. The above explanations for FIG. 8 can also be applied appropriately adapted to this reverse embodiment variant.
    As shown in FIG. 9, the intermediate ring 14 can have a conical shape (in the axial direction) at least in some areas. Accordingly, the outer ring 12 and the inner ring 13 also have an at least partially conical shape of the surfaces abutting the intermediate ring 14.
    It is alternatively or additionally possible that the first pulley 5 is designed with an inner ring, an outer ring and an intermediate ring. The statements regarding the second pulley 7 can therefore be transferred to the first pulley 5 in this case.
    According to a further embodiment variant of the second pulley 7, which can best be seen from FIG. 3, it can be provided that the intermediate ring 14 in the radial direction between a bearing seat surface 40 for a bearing 41 (FIG. 2) and a contact surface 42 of the second pulley 7 is arranged on the recirculating ball nut. For this purpose, the outer ring 12 can have a radial projection 43, which is formed in particular in one piece therewith and extends in the direction of the inner ring 12. The axial length of the radial projection 43 is preferably the same size as the axial length of the inner ring 12 (in the same direction), as can be seen from FIG. 3.
    It is further preferred that this radial projection 43 is formed starting from the second axial end face 25 of the outer ring 12, as is the case here
    N2018 / 14100-AT-00/30 is also shown in Fig. 3. The radial projection 43 can, however, also be arranged at another location on the outer ring 12, for example in the center.
    The radial projection 43 can have a greater axial length than the bearing seat surface 40 viewed in the same direction. Thus, the rim 15 (FIG. 2) can also be arranged in the radial direction above the radial projection 43.
    The bearing 41 can again be designed as a roller bearing, in particular a ball bearing, or as a plain bearing. About this bearing 41, the rotatable mounting of the second pulley 7 with the ball screw nut in a housing of the ball screw 6 (Fig. 2) can be made possible.
    The second pulley 7 can be arranged eccentrically (viewed in the axial direction) on the recirculating ball nut (as can be seen in FIG. 2), for example by means of a press fit. But it can also be arranged centrally on the ball screw nut.
    If necessary, the steering system 1 can also have a speed reducer for reducing the speed supplied by the engine.
    In addition to the use of the pulley 7 in a steering system, it can also be used in other motor vehicle applications, such as, for example, generally in an automotive belt drive, in a timing drive, in a drive for an auxiliary unit. In addition, there are also applications in automation technology, e.g. in a robot, or generally possible in belt and chain drives, the toothing of the pulley 7 being able to be designed differently for chain drives.
    The exemplary embodiments show possible design variants of the steering system 1, it being noted at this point that combinations of the individual design variants with one another are also possible.
    For the sake of order, it should finally be pointed out that, for a better understanding of the structure of the steering system 1, this or parts thereof were not necessarily drawn to scale.
    N2018 / 14100-AT-00/30
    LIST OF REFERENCE NUMBERS
    1 steering system 31 recess 2 engine 32 recess 3 wave 33 recess 4 camp 34 recess 5 pulley 35 recess 6 Ballscrew 36 recess 7 pulley 37 head Start 8th wave 38 gradation 9 toothed belt 39 gradation 10 external teeth 40 Bearing seat surface 11 external teeth 41 camp 12 outer ring 42 contact surface 13 inner ring 43 radial projection 14 intermediate ring 15 shelf 16 face 17 edge 18 edge 19 area 20 face 21 face 22 edge 23 edge 24 area 25 face 26 face 27 curve 28 curve 29 curve 30 curve
    N2018 / 14100-AT-00/30
    claims
    1. steering system (1) comprising a motor (2) with a first pulley (5) and a ball screw (6) with a second pulley (7), the first and the second pulley (5, 7) via a belt, preferably a toothed belt (9) are connected to one another, characterized in that the first and / or the second pulley (5, 7) comprises an outer ring (12), an inner ring (13) and an intermediate ring (14), the Outer ring (12) preferably has an external toothing (1), the intermediate ring (14) is arranged in the radial direction between the outer ring (12) and the inner ring (13) and is connected to the latter, and the intermediate ring (14) is at least partially made of an elastic rubber Material exists.
    2. Steering system (1) according to claim 1, characterized in that the intermediate ring (14) is arranged in the radial direction between a bearing seat surface (40) and a contact surface (42) of the second pulley (7) on a ball screw nut.
    3. Steering system (1) according to claim 1 or 2, characterized in that edges (17, 18) of the inner ring (13) in the connection area between the inner ring (13) and the intermediate ring (14) and / or edges (22, 23) in the connection area between the outer ring (12) and the intermediate ring (14) are provided with a rounding (27 to 30).
    4. Steering system (1) according to one of claims 1 to 3, characterized in that the intermediate ring (14) in the axial direction over the inner ring (13) and / or outer ring (12) projecting and in the radial direction the inner ring (13) and / or the outer ring (12) extends partially overlapping.
    5. Steering system (1) according to one of claims 1 to 4, characterized in that the inner ring (13) on at least one axial end face (20, 21)
    N2018 / 14100-AT-00/30 has / have a recess (33, 34) and / or the outer ring (12) on at least one axial end face (25, 26) a recess (35, 36) and that the intermediate ring (14 ) engages in the recess (33 or 34 or 35 or 36) or the recesses (33 to 36).
    6. Steering system (1) according to claim 5, characterized in that edges of the recesses (33 to 36) in the axial end faces (20, 21, 25, 26) are also provided with a curve.
    7. Steering system (1) according to one of claims 1 to 6, characterized in that the inner ring (13) on at least one radial surface (19) has a recess (31 and / or the outer ring (12) on at least one radial surface (24 ) has / have a recess (32) and that the intermediate ring (14) engages in the recess (31 or 32) or the recesses (31, 32).
    8. Steering system (1) according to claim 7, characterized in that edges of the recesses (31,32) in the radial surfaces (19, 24) are also provided with a curve.
    9. steering system (1) according to one of claims 1 to 8, characterized in that the intermediate ring (14) on the inner ring (13) and / or the outer ring (12) vulcanized or with the inner ring (13) and / or outer ring ( 12) is pressed.
    N2018 / 14100-AT-00/30
    η
    Μ IL
    Miba Sinter Austria GmbH / 30
    / 30
    Figure 4
    / 30
    Miba Sinter Austria GmbH / 30
    Fig. 8 7
    I
    Miba Sinter Austria GmbH / 30
    权利要求:
    Claims (8)
    [1]
    1. steering system (1) comprising a motor (2) with a first pulley (5) and a ball screw (6) with a second pulley (7), the first and the second pulley (5, 7) via a belt, preferably a toothed belt (9) are connected to one another, and the first and / or the second pulley (5, 7) comprises an outer ring (12), an inner ring (13) and an intermediate ring (14), the outer ring (12 ) preferably has an external toothing (1), the intermediate ring (14) is arranged in the radial direction between the outer ring (12) and the inner ring (13) and is connected to the latter, and the intermediate ring (14) consists at least partially of a rubber-elastic material, characterized in that the intermediate ring (14) is arranged in the radial direction between a bearing seat surface (40) and a contact surface (42) of the second pulley (7) on a recirculating ball nut.
    [2]
    2. Steering system (1) according to claim 1, characterized in that edges (17, 18) of the inner ring (13) in the connection area between the inner ring (13) and the intermediate ring (14) and / or edges (22, 23) in the connection area are provided with a rounding (27 to 30) between the outer ring (12) and the intermediate ring (14).
    [3]
    3. Steering system (1) according to claim 1 or 2, characterized in that the intermediate ring (14) in the axial direction over the inner ring (13) and / or outer ring (12) projecting and in the radial direction the inner ring (13) and / or extends partially overlapping the outer ring (12).
    [4]
    4. Steering system (1) according to one of claims 1 to 3, characterized in that the inner ring (13) on at least one axial end face (20, 21) has a recess (33, 34) and / or the outer ring (12) on at least an axial end face (25, 26) has / have a recess (35, 36) and that [LAST CLAIMS]
    29/30
    A2018 / 50610-AT-00 the intermediate ring (14) engages in the recess (33 or 34 or 35 or 36) or the recesses (33 to 36).
    [5]
    5. Steering system (1) according to claim 4, characterized in that edges of the recesses (33 to 36) in the axial end faces (20, 21, 25, 26) are also provided with a curve.
    [6]
    6. Steering system (1) according to one of claims 1 to 5, characterized in that the inner ring (13) on at least one radial surface (19) has a recess (31 and / or the outer ring (12) on at least one radial surface (24 ) has / have a recess (32) and that the intermediate ring (14) engages in the recess (31 or 32) or the recesses (31, 32).
    [7]
    7. steering system (1) according to claim 6, characterized in that edges of the recesses (31, 32) in the radial surfaces (19, 24) are also provided with a curve.
    [8]
    8. Steering system (1) according to one of claims 1 to 7, characterized in that the intermediate ring (14) on the inner ring (13) and / or the outer ring (12) vulcanized or with the inner ring (13) and / or outer ring ( 12) is pressed.
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    同族专利:
    公开号 | 公开日
    US20200017138A1|2020-01-16|
    DE102019118064A1|2020-01-16|
    AT520920B1|2019-09-15|
    CN110723198A|2020-01-24|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    KR100780993B1|2006-11-07|2007-11-30|지엠대우오토앤테크놀로지주식회사|A damper pulley device|
    DE102008014402A1|2008-03-14|2009-09-17|Volkswagen Ag|Electromechanical steering gear for use in motor vehicle, has gear rack, electric motor, and gearbox, where gearbox has belt drive with two belt pulleys and belt for coupling belt pulleys|
    DE102014211579A1|2014-06-17|2015-12-17|Contitech Antriebssysteme Gmbh|Pulley and belt drive with such pulley|WO2022032315A1|2020-08-10|2022-02-17|Kreisel Electric Gmbh & Co Kg|Temperature-control device for individual battery cells combined to form a module|JP2017109654A|2015-12-17|2017-06-22|株式会社ジェイテクト|Steering device|CN111249139A|2020-01-22|2020-06-09|李榕|Paediatrics skin protection nursing device|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    ATA50610/2018A|AT520920B1|2018-07-16|2018-07-16|steering system|ATA50610/2018A| AT520920B1|2018-07-16|2018-07-16|steering system|
    US16/442,745| US20200017138A1|2018-07-16|2019-06-17|Steering system|
    DE102019118064.3A| DE102019118064A1|2018-07-16|2019-07-04|steering system|
    CN201910622253.5A| CN110723198A|2018-07-16|2019-07-11|Steering system|
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