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
  • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
  • F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
  • F16D3/16—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts
  • F16D3/26—Hooke's joints or other joints with an equivalent intermediate member to which each coupling part is pivotally or slidably connected
  • F16D3/38—Hooke's joints or other joints with an equivalent intermediate member to which each coupling part is pivotally or slidably connected with a single intermediate member with trunnions or bearings arranged on two axes perpendicular to one another
  • F16D3/382—Hooke's joints or other joints with an equivalent intermediate member to which each coupling part is pivotally or slidably connected with a single intermediate member with trunnions or bearings arranged on two axes perpendicular to one another constructional details of other than the intermediate member
  • F16D3/387—Fork construction; Mounting of fork on shaft; Adapting shaft for mounting of fork
• • 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
  • F16D1/08—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 with clamping hub; with hub and longitudinal key
• • 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
  • F16D1/08—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 with clamping hub; with hub and longitudinal key
  • F16D1/0852—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 with clamping hub; with hub and longitudinal key with radial clamping between the mating surfaces of the hub and shaft
  • F16D1/0864—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 with clamping hub; with hub and longitudinal key with radial clamping between the mating surfaces of the hub and shaft due to tangential loading of the hub, e.g. a split hub
• • 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
  • Y10T403/00—Joints and connections
  • Y10T403/70—Interfitted members
  • Y10T403/7062—Clamped members
  • Y10T403/7064—Clamped members by wedge or cam
  • Y10T403/7066—Clamped members by wedge or cam having actuator

Definitions

• the invention relates to a connection of a shaft piece of a steering shaft for a motor vehicle with a connecting part, which has a common longitudinal center axis with the shaft piece and which has a receiving opening bounded by a wall, through which the longitudinal center axis extends and in which a connecting portion of Shaft piece is defined, and having a slot which interrupts the receiving opening bounding wall and is located between first and second clamping portions of the connecting part, which each form a subsequent to the slot portion of the receiving opening bounding wall, wherein for closing the connection, the first and second Spannabschnit- te of a clamping part with narrowing of the slot contractible and can be pressed for clamping the connecting portion with the connecting part to the connecting portion, and the receiving opening limiting wall has positive locking elements and the äu ere surface of the connecting portion of the shaft piece desprezier institute which cooperate with the form-locking elements of the receiving opening bounding wall, wherein acting through the cooperating positive locking elements and Gegenform gleiche against the rotation of the connecting portion
• connection serves, in particular, for fastening a yoke of a universal joint to an end section of a shaft section of the steering shaft.
• the steering shaft in this case has two or more shaft pieces, which are connected by universal joints, the joint forks are fixed to the shaft pieces.
• the connection part for example, a shaft extension or fixed to the shaft piece pinion of the steering gear.
• Fork joints with slotted forks are evident, for example, from US 2010/0069163 A1 and EP 1 064 467 B1.
• a fork base in the receiving opening of which an end section of the shaft section is accommodated, has a slot, lying on both sides of the clamping section of the fork base.
• the clamping sections have aligned passage openings through which a clamping bolt extends. By means of the clamping bolt, the clamping sections are contracted while reducing the slot in order to clamp the fork base against the shaft section.
• the steering shaft In steering systems with power assistance, which is introduced into the steering shaft, the steering shaft must be able to transmit very high torques and in particular very high torque peaks.
• conventionally designed fork connections of the abovementioned type which lie in the transmission path of the torque must be designed to be very solid in order to be able to transmit the required torques without bending the clamping sections of the fork base.
• a tensioning part is provided, which is arranged in a bore which is formed at right angles to the axis of the steering shaft and formed in the fork base. This bore has an overlap region with the shaft end receiving receiving opening of the fork base.
• the clamping part has a wedge surface, with which it bears against a flattening, which is introduced into the lateral surface of the shaft piece, and is clamped with a clamping screw against this flattening.
• the tensioning part thus acts as a feather key and the transmission of the torque acting between the shaft piece and the yoke takes place via this tensioning part.
• On The wall of the bore receiving the clamping part thus has a high hole clearance pressure.
• the construction must be solid accordingly.
• fork-shaft connections in which an end portion of the steering shaft is pressed into the receiving opening of the fork base.
• a positive connection in the rotational direction is formed by a non-circular shape of the end portion of the shaft and the receiving opening in the fork base or by a toothing on the end portion of the shaft which digs when pressed into the wall surrounding the receiving opening.
• the gearing can also be at the
• the shaft piece and the connecting part have mutually cooperating form-locking elements, which are formed by toothings which, apart from the region of the recess of the shaft piece, revolve around the shaft piece and the receiving opening of the connecting part.
• a trapezoidal projection is further provided on the shaft piece, which is received in a trapezoidal depression of the connecting part.
• the connecting part formed by the universal joint fork, which is formed slotted, and the shaft piece also have co-operating positive locking elements.
• cooperating gears are provided.
• flats on both sides are present with bulges lying in the region of these flattened areas.
• a slotted fork with interlocking elements is also apparent from JP 2010-281364 A.
• the cooperating interlocking elements of the fork and the shaft piece are designed in the form of circumferential toothings.
• the object of the invention is to provide a connection of the type mentioned between a shaft portion of a steering shaft and a connecting part, which can absorb very high torques, as they occur especially at rskraftunterstütz ⁇ th steering systems whose auxiliary power assistance engages in the upper region of the steering shaft.
• the material required for the connection part material use should be low and the required space to be as small as possible.
• the wall bounding the receiving opening has form-locking elements
• the outer surface of the connecting section of the shaft section received in the receiving opening has counter-form-locking elements which interact with the form-locking elements of the wall bounding the receiving opening.
• the clamping part is in particular formed by a clamping bolt, which is arranged at least partially in bores in the clamping sections of the connecting part.
• the clamping member is spaced in the closed state of the connection from the connecting portion of the shaft piece.
• surfaces can act, which are formed by at least one extending in the axial direction of the shaft piece elevation, preferably a plurality of such elevations, and / or at least one extending in the axial direction of the shaft portion recess, preferably a plurality of such recesses.
• surfaces could also be provided, for example, which, viewed in cross section, are in the form of tendons introduced into a circular shape.
• the forces occurring due to torque transmission are in the connection according to the invention mainly on the engaged molding End elements of the receiving opening limiting wall and Gegenform- closing elements of the connecting portion transmitted, and not by a frictional connection between the shaft piece and the connecting part. Also, the force acting on the at least one clamping part in a transmission of a torque additionally force (in addition to the biasing force) is substantially less than the force acting on the interlocking elements total force.
• At least one positive locking element which is clamped in the closed state of the connection with a counter-form-locking element, in an area opposite the slot, that is arranged in a region whose
• Angular distance relative to the angle of rotation about the longitudinal center axis of the shaft piece and the connection part of the slot is 180 ° +/- 10 °.
• at least one positive locking element cooperating with this counter-form-locking element is forced in closing the connection.
• all interlocking elements which are clamped in the closed state of the connection with a counter-form-locking element arranged in an angular range which is spaced from the slot lying between the clamping portions in both directions about the longitudinal center axis of the shaft piece and the connecting part at least 100 °. That in an angular range which extends over at least 100 ° in both directions of rotation about the longitudinal central axis of the shaft piece or connecting part subsequent to the slot, there are no cooperating positive locking elements and counter-form-locking elements (there can be no positive locking elements and counter-form-locking elements in this angular range) but could also be positive locking elements present, which do not interact with a counter-form-locking element, or vice versa).
• the connecting part is a universal joint fork, which comprises legs with bearing openings and a fork base from which the legs protrude.
• Fig. 1 is a schematic representation of a possible embodiment of a steering system with auxiliary power assistance
• Figure 2 is an oblique view of a universal joint with first and second joint forks, which are connected to a respective shaft piece.
• 3 is an oblique view of one of the joint forks with the spider, without a connected shaft and without clamping part, from a different angle; 4 shows a cross section through the yoke and the inserted into the receiving opening connecting portion of the shaft piece, in the open state of the compound.
• Fig. 5 is a cross section corresponding to Figure 4, in the closed state of the compound (section line AA of Fig. 2).
• Fig. 6 is a modified embodiment
• Fig. 8 shows a further modified embodiment.
• the steering column 1 shown schematically in Fig. 1 corresponds in its basic structure of the prior art.
• a steering shaft which comprises two or more straight shaft pieces 3, between each of which a universal joint 4 is arranged.
• the steering shaft is connected to the tie rods 6 via a steering gear 5, wherein the tie rods 6 are driven by a rack 7.
• the steering column further comprises a, for example electric, auxiliary drive 8, from which a torque can be exerted on the steering shaft, which is transmitted via the arranged between the auxiliary drive 8 and the steering gear 5 in the steering shaft cross joints 4.
• the auxiliary drive 8 may be provided in a conventional manner for applying a steering assist force and / or the rotational speed superimposition, for which purpose corresponding gear between the auxiliary drive 8 and the steering shaft are used (not visible in Fig. 1).
• control device to which the operation of the steering wheel 2 is fed via a sensor as a signal.
• the corresponding control signal for example a control voltage for the auxiliary drive can be determined therefrom, optionally with the aid of a sensor signal of the auxiliary drive of the steering system and / or the rotational speed superposition device and / or further signals describing the vehicle state be spent on this.
• the universal joints 4 each comprise first and second joint forks, each of which forms a connection part 9 connected to the respective shaft piece 3.
• the connection with the associated connection part 9 is formed in accordance with the invention.
• the compounds of the shaft pieces 3 are formed with the connection parts 9 in accordance with the invention.
• the legs 10, 11 are spaced apart from one another. th, preferably at least approximately parallel planes (the angle which the planes enclose with each other is less than 5 °).
• a spider 13 which has offset by 90 ° to each other pivot pin.
• each of the two offset by 180 ° to each other pivot pin whose longitudinal axes coincide, rotatably mounted relative to one of the two joint forks.
• the pivot pins each protrude into a bearing opening 14 of the respective leg 10, 1 1 and are rotatably mounted in this.
• FIGS. 2 to 5 A first embodiment according to the invention of the connection between a shaft section 3 and a connection part 9 can be seen in FIGS. 2 to 5.
• a portion of the connecting part 9, in the application shown, the fork base 12, has a receiving opening 15 in which a connecting portion 26 of the shaft piece 3, which here forms an end portion of the shaft piece 3, is received.
• the receiving opening 15 is formed in the embodiment as a passage opening through the connection part 9, here the fork base 12.
• the longitudinal central axis 16 of the wave piece 3 that is formed straight coincides with the longitudinal central axis of the connecting part 9 extending through the receiving opening 15.
• the receiving opening 15 of the connecting part 9 is bounded in the radial direction by a wall 17 of the connecting part 9, which is interrupted by a slot 27.
• the slot 27 is located between clamping portions 12a, 12b of the connecting part 9, here the fork base 12.
• the clamping portions 12a, 12b each form a subsequent to the slot 27 portion of the receiving opening 15 bounding wall 17.
• the clamping portions 12a, 12b are in the closed state of Connection by a clamping member 20 in the direction of each other acted upon (contracted).
• Clamping sections 12a, 12b are considered those sections of the connecting part 9 (in this case the fork base 12 of the yoke) adjoining the slot 27, which are deformed when the connection is closed, ie bent inwards (in the direction of the other clamping section).
• the clamping part is formed in the embodiment of a clamping bolt, which passes through a bore 24 in the clamping portion 12a and is screwed into an internal thread of an introduced into the clamping portion 12b bore 25.
• the holes 24, 25 are aligned with each other and their longitudinal central axes are preferably perpendicular to the longitudinal central axis 16 of the shaft piece 3. In principle conceivable and possible would be an oblique arrangement to the longitudinal central axis 16 of the shaft piece. 3
• the form-fitting and counter-form-locking elements 18, 19 braced with one another form a form-locking connection between the shaft piece 3 and the connecting part 9, ie a positive locking acting against a rotation of the connecting portion 29 of the shaft piece 3 with respect to the connecting part 9 about the longitudinal center axis 16 is formed.
• the clamping sections 12a, 12b are pressed against the connecting section 26 by the prestressed clamping part 20.
• counter-form-closure elements 19 of the connection section 26 with form-fitting elements 18 of the wall 17 are clamped in an angular region 28 around the longitudinal central axis 16.
• the angular region 28 is spaced from the slot 27 in both directions of rotation about the longitudinal central axis 16 by angles 29, 30, which are each at least 100 °. All interlocked the interlocking and counter-form-fitting elements are in this angular range (the interlocking elements angular range) 28th
• the angles 29, 30 are therefore the (positive and negative) polar angles of the polar coordinate system related to the longitudinal central axis.
• the slot 27 extends over a certain angular range.
• the circumference around the connecting portion 26 is thus advantageously divided into at least substantially opposite regions, in which on the one hand the clamping force of the clamping portions 12a, 12b is transmitted to the connecting portion 26, and on the other hand, the positive connection between the connecting portion 26 and the connecting part 9 takes place.
• the transfer of the clamping force of the clamping portions 12a, 12b on the connecting portion 26 takes place in the illustrated embodiment by edges that lie between a respective adjoining the slot 27 portion of the wall 17 and a respective slot 27 limiting wall 31, 32. These edges are pressed against the connecting section 26 and press it against a portion of the wall 17 opposite the slot 27. As a result, the counter-form-locking elements 19 of the connecting section 26 interacting therewith are pressed against the form-locking elements 18 of the wall 17 arranged in this area.
• a section of the wall 17 adjoining the said edges is in each case spaced apart from the connecting section 26, a gap 23 being formed between the connecting section 26 and the wall 17 in each case.
• sections of the wall 17 adjoining the slot 27 on both sides, which are formed by the clamping sections 12a, 12b, are each pressed against the connecting section 26. On the side remote from the slot 27, following these pressed-on sections, a gap 23 between the connecting section 26 and the wall 17 could again be present in each case.
• the clamping part 20 is screwed into a threaded section on the clamping section 12b and clamped.
• the portions of the wall 17 formed by the chucking portions 12a, 12b move inwardly (toward the longitudinal center axis of the shaft piece 3). In the corresponding directions thus reduces the diameter of the receiving opening 15th
• the width of the slot 27 is less than in the open state.
• the clamping member 20 is tensioned with a biasing force.
• the clamping sections 12a, 12b are contracted by the clamping part 20 and the sections of the wall 17 adjoining the slot 27 between the wall 17 and the respective wall 31, 32 are pressed against the connecting section and clamp the connecting section 26 with them the connecting part 9 under tension of the form-locking elements 18 and counter-form-locking elements 19.
• the Martinezform gleichiana 19 of the shaft piece 3 for example, as shown by the side surfaces of several in the longitudinal direction of the shaft piece 3 running, tooth-shaped elevations formed.
• the wall 17 has for the formation of form-locking elements 18 in the longitudinal direction of the shaft piece 3 extending, seen in cross-section through the shaft piece 3, preferably conical, tapered depressions. In the exemplary embodiment, four such surveys and depressions are provided.
• Traction and counter-form-closure elements 18, 19 designed in another way could also or additionally be provided.
• recesses extending in the longitudinal direction of the shaft piece 3 could be provided in the connecting portion 29 of the shaft piece 3, which cooperate with elevations of the wall 17 of the receiving opening 15 extending in the longitudinal direction of the shaft piece 3, and / or flats or other contours corresponding to one of the Form circular shape deviating cross-sectional shape could be provided.
• the positive locking elements of the wall 17 of the receiving opening 15 can be formed in a simple manner by a clearing operation. An indentation during the forming operation for producing the fork is also possible.
• the counter-form-locking elements 19 of the connecting portion 29 of the shaft pull 3 can be formed for example by a rolling or knurling operation.
• Figs. 6 to 8 show modified embodiments. Apart from the difference described below, the embodiment corresponds to the embodiment described above.
• the holes 24 and 25 are formed as aligned passage openings through the clamping portions 12a, 12b and formed as a clamping bolt clamping part 20 passes through them and is screwed by a screwed onto an external thread of the protruding from the bore 25 portion of the clamping bolt clamping nut 21 braced.
• FIG. 7 shows a possible modification of an arrangement of the form-fitting elements 18 and counter-form-closure elements 19.
• the connecting section 29 of the shaft piece 3 can also have, in addition to the counter-form-locking elements 19 engaged with the interlocking elements 18, further, for example tooth-shaped elevations and / or tooth-shaped recesses, flattenings or other configurations of its outer surface, by which one of the cross-sectional shape of the connecting portion 29 deviating from the circular shape is formed, wherein these further elements (by virtue of which a positive fit acting in the direction of rotation in principle) could not be engaged with the preformed positive locking elements 18 in the wall 17 of the receiving opening 15.
• Fig. 8 shows such a modified embodiment in which the connecting portion 29 circumferentially has a toothing.
• a circumferential toothing of the connecting portion 29 of the wave piece 3 can be formed for example by knurling.
• the remaining teeth do not arrive, or at least substantially not, in positive engagement with the wall 17 of the connecting part 9.
• the teeth which do not engage with the interlocking elements 18 are more or less flattened during clamping by the clamping part 20. Through these teeth, a frictional engagement between the connecting portion 26 and the wall 17 is formed.
• the teeth which are in engagement with the interlocking elements 18 and form the counter-form-locking elements 19 are made larger than the remaining teeth. But it could also be all the same size teeth. It is also conceivable and possible in a modified embodiment that the tips of at least the teeth lying in the vicinity of the preformed form-fitting elements dig more or less into the wall 17, whereby further form-locking elements are formed during clamping, which are provided with counter-shape closing elements of the shaft piece engage and form a force acting in the direction of rotation positive connection. At least over angles 29, 30 of 100 °, however, there are no positive-fit and counter-form-fitting elements present on either side of the slot 27.
• the interlocking elements and counter-form-locking elements can not completely disengage even when the clamping part is open or removed (as long as the engagement is not canceled by an axial displacement of the shaft piece relative to the connecting part).
• connection part 9 Due to the high biasing force under which the clamping member 20 is, a secure and tight fit of the connecting portion 26 can be achieved in the connection part 9, which does not solve automatically even with high alternating loads.
• connection parts as joint forks can be connected in the manner described with a shaft portion of the steering shaft, such as a steering pinion.
• a compound according to the invention can advantageously be repeatedly closed and non-destructively reopened, in particular by means of a turning tool.

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• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Clamps And Clips (AREA)
• Steering Controls (AREA)

Applications Claiming Priority (2)

Publications (1)

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ID=46148578

Family Applications (1)

Country Status (5)

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• 2011
  • 2011-05-31 DE DE102011050748A patent/DE102011050748B3/de active Active
• 2012
  • 2012-04-26 EP EP12723073.8A patent/EP2715170A1/de not_active Withdrawn
  • 2012-04-26 US US14/122,829 patent/US20140086679A1/en not_active Abandoned
  • 2012-04-26 WO PCT/AT2012/000113 patent/WO2012162710A1/de active Application Filing
  • 2012-04-26 CN CN201280026867.3A patent/CN103562581A/zh active Pending

Non-Patent Citations (2)

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