WO2005028894A1 - Joint homocinetique presentant un faible deplacement radial des billes - Google Patents

Joint homocinetique presentant un faible deplacement radial des billes Download PDF

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Publication number
WO2005028894A1
WO2005028894A1 PCT/EP2004/006086 EP2004006086W WO2005028894A1 WO 2005028894 A1 WO2005028894 A1 WO 2005028894A1 EP 2004006086 W EP2004006086 W EP 2004006086W WO 2005028894 A1 WO2005028894 A1 WO 2005028894A1
Authority
WO
WIPO (PCT)
Prior art keywords
joint
center
radius
plane
ball tracks
Prior art date
Application number
PCT/EP2004/006086
Other languages
German (de)
English (en)
Inventor
Peter Schwärzler
Heiko Harnischfeger
Original Assignee
Gkn Driveline Deutschland Gmbh
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
Priority claimed from DE102004006225A external-priority patent/DE102004006225B4/de
Application filed by Gkn Driveline Deutschland Gmbh filed Critical Gkn Driveline Deutschland Gmbh
Priority to US10/568,897 priority Critical patent/US8430758B2/en
Priority to JP2006524229A priority patent/JP4383450B2/ja
Publication of WO2005028894A1 publication Critical patent/WO2005028894A1/fr

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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
    • F16D3/20—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members
    • F16D3/22—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts
    • F16D3/223—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts the rolling members being guided in grooves in both coupling parts
    • F16D3/2233—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts the rolling members being guided in grooves in both coupling parts where the track is made up of two curves with a point of inflexion in between, i.e. S-track joints
    • 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
    • F16D3/20—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members
    • F16D3/22—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts
    • F16D3/223—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts the rolling members being guided in grooves in both coupling parts
    • F16D3/2237—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts the rolling members being guided in grooves in both coupling parts where the grooves are composed of radii and adjoining straight lines, i.e. undercut free [UF] type joints
    • 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
    • F16D3/20—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members
    • F16D3/22—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts
    • F16D3/223—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts the rolling members being guided in grooves in both coupling parts
    • F16D3/224—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts the rolling members being guided in grooves in both coupling parts the groove centre-lines in each coupling part lying on a sphere
    • 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
    • F16D3/20—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members
    • F16D3/22—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts
    • F16D3/223—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts the rolling members being guided in grooves in both coupling parts
    • F16D2003/22303—Details of ball cages
    • 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
    • F16D3/20—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members
    • F16D3/22—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts
    • F16D3/223—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts the rolling members being guided in grooves in both coupling parts
    • F16D2003/22306—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts the rolling members being guided in grooves in both coupling parts having counter tracks, i.e. ball track surfaces which diverge in opposite directions

Definitions

  • the invention relates to a constant velocity joint in the form of a fixed joint with the features of an outer joint part which has a longitudinal axis and axially opposite one another has a first side S1 and a second side S2 and which has outer ball tracks, an inner joint part which has a longitudinal axis and connecting means for one has an opening of the outer joint part and has the inner ball tracks, the outer ball tracks and the inner ball tracks form pairs of tracks with each other, the track pairs each take up a torque-transmitting ball, an annular ball cage sits between the outer joint part and the inner joint part and has circumferentially distributed cage windows, each of which at least Take up one of the torque-transmitting balls, the center points of the balls are held by the cage in a joint center plane and guided to the bisector plane between the longitudinal axes when the joint is bent.
  • a large cage thickness necessarily reduces the ball encirclement of the balls by the ball tracks when viewed in cross section through the joint, since the cage leads to a reduced track depth of the outer ball tracks and the inner ball tracks as the cage thickness increases.
  • the torque capacity of the joint decreases with a reduction in the path depth and thus a reduced ball encirclement.
  • the present invention has for its object to provide a fixed joint of the aforementioned type with a further increased torque capacity.
  • a first solution lies in a constant velocity joint in the form of a fixed joint with the features: an outer joint part which has a longitudinal axis L12 and a first side S1 and a second side S2 lying axially opposite one another and which has outer ball tracks, an inner joint part which has a longitudinal axis L13 and connecting means for a shaft pointing to an opening of the outer joint part and which has inner ball tracks, the outer ball tracks and the inner ball tracks form pairs of tracks, the track pairs each take up a torque-transmitting ball, an annular ball cage sits between Joint outer part and inner joint part and has circumferentially distributed cage windows, each of which receive at least one of the torque-transmitting balls, the center points of the balls are held by the cage in a central joint plane EM and, when the joint is bent, are guided to the bisecting plane between the longitudinal axes L12, L13, the center lines M22, M23 the ball tracks of track pairs lie in radial planes ER through the joint, the center lines M22, M
  • the path shape specified herewith a reduction of the radial ball movement is possible in comparison with known path shapes.
  • This reduction in the ball movement can be converted into a reduction of the cage thickness in the area of the cage window and thus into an increase in the ball wrapping of the balls by the ball tracks, the latter directly leading to an increase in the torque capacity of the joint.
  • the first-mentioned feature, according to which the center lines leave the reference radii inwards, can start directly at the joint center plane or can also start later, whereby it can be preserved progressively in particular.
  • the feature mentioned as the second, according to which the center lines migrate outward over the reference radius includes a direct migration outward from the reference radius as well as a later crossing of the reference radius and subsequent migration outward.
  • Joint center plane EM is smaller than the reference radius RB, in the inner joint part is the local radius of curvature R1 'of the center plane M23 in the
  • the constant velocity joint is provided with the further features: in the outer joint part, the center line M22 of the ball tracks runs radially from the center joint plane EM to the first side S1, radially outside a reference radius R2, the center of the radius of which lies in the center of the joint M, and the center line runs in the inner joint part M23 of the ball tracks from the joint center plane EM to the second side S2 radially outside a reference radius RZ ' , the radius center of which lies in the center of the joint M.
  • a further advantageous embodiment lies in the further features: in the outer joint part, the center line M22 of the ball tracks runs radially outside the reference radius RB from the joint center plane EM to the second side S2, and in the inner joint part the center line M23 of the ball tracks runs from the joint center plane EM to the first side S1 each radially outside the reference radius RB.
  • the center line M22 of the ball tracks runs radially from the center joint plane EM to the second side S2, each radially within a reference radius RZ around the center of the joint M, and in the inner joint part the center line M23 of the ball tracks runs from the joint center plane EM towards the first side radially within a reference radius RZ ' around the center of the joint M.
  • the center lines M22, M23 of the outer ball tracks and inner ball tracks each comprise at least two oppositely curved arc sections which adjoin one another at an inflection point
  • the inflection points W22 of the outer ball tracks are at a distance from the central plane EM second side S2
  • the turning points W23 of the inner ball tracks are at a distance from the central plane EM to the first side S1
  • the turning points are each below a maximum of the distance of the center lines M22, M23 from the longitudinal axes L12, L13.
  • a specific embodiment example has the features: the center lines M22 of the outer ball tracks have a first arc with the radius R1, the center M1 of which is offset by a first axial offset 01a from the central plane EM of the joint to the first side S1 and by a first radial one Offset 01 r is offset from the longitudinal axis L12 to the ball track and then a second arc with the radius R2, the center M2 of which is offset by a second axial offset 02a from the
  • the center plane EM of the joint is offset toward the second side S2 and is offset by a second radial offset 02r, which is greater than the sum of the first radius R1 and the first radial offset 01 r, from the longitudinal axis L12 to the outside M23 of the inner ball tracks have a first arc with the radius R1 ', the center M1 ' of which is offset by a first axial offset 01a from the central plane EM of the joint to the second side S2 and by a first radial offset 01 r
  • the local radius of curvature of the center lines M22 of the outer ball tracks decreases in the course from the center plane EM to the first side S1 and the local radius of curvature of the center lines M23 of the inner ball tracks decreases in the course from the center plane EM to the second side S2 ,
  • the path center lines M22 of the outer ball tracks have a third arc with the radius of curvature R3, which connects tangentially with the same sense of curvature to the first arc with the radius of curvature R1 and whose radius of curvature R3 is smaller than the radius of curvature R1 and the center lines M23 of the inner ball tracks have a third arc with the radius of curvature R3 ', which tangentially adjoins the first arc with the radius of curvature R1' with the same sense of curvature and whose radius of curvature R3 'is smaller than the radius of curvature R1'.
  • the center lines M22, M23 of the ball tracks intersect at an angle of 4 to 32 ° in the central plane of the joint, the tangents T22 ' , T23 ' to the track baselines of the ball tracks of all track pairs having an equally large opening angle Form ⁇ .
  • the track shape is designed such that the radial movement e of the balls during the movement along the ball tracks over the maximum operating angle + ßm a ⁇ / 2 to the value e ⁇ 0.06 • ß ma ⁇ ⁇ PCR, where ß ma ⁇ the maximum bending angle in radians and PCR is the rolling circle radius of the joint.
  • ß ma ⁇ the maximum bending angle in radians
  • PCR the rolling circle radius of the joint.
  • a second solution consists in a constant velocity joint in the form of a fixed joint with the features: an outer joint part which has a longitudinal axis L12 and a first side S1 and a second side S2 lying axially opposite one another and which has outer ball tracks, an inner joint part which has a longitudinal axis L13 and has connection means for a shaft pointing towards an opening of the outer joint part and which has inner ball tracks, the outer ball tracks and the inner ball tracks form pairs of tracks with each other, the track pairs each take up a torque-transmitting ball, an annular ball cage sits between the outer joint part and the inner joint part and has circumferentially distributed cage windows, which each receive at least one of the torque-transmitting balls, the center points of the balls become from the cage held in a joint median plane EM and guided to the bisecting plane between the longitudinal axes L12, L13, the center lines M22, M23 of the ball tracks of track pairs lie in pairs of track planes BE, BE *, which are essentially symmetrical and parallel
  • the solution proposed herewith differs from the former, in which the center lines of path pairs in radial planes ER lie through the central axes L12, L13 of the joint, in that, in the present case, the center lines of pairs of paths each have two adjacent balls in two substantially parallel to each other and Path planes BE, BE * arranged symmetrically and parallel to a radial plane ER.
  • the radial plane ER is defined by the longitudinal axes L12, L13 with the joint extended.
  • the path shapes in the second solution relate to parallel axes PE, PE * to the longitudinal axis, which lie in a reference plane EX perpendicular to the radial plane R through the longitudinal axes L12, L13, and to reference centers ME , which lie on the parallel axes PE, PE * and in the intersection of the parallel axes with the joint center plane EM.
  • Joints of the type described here have a number of path pairs which can be divided by two, if only one path lies in each path plane BE, BE *. They have a number of path pairs divisible by four if two substantially diametrically opposed path pairs of mutually symmetrical shape lie in each of the path planes BE, BE *.
  • the path planes BE, BE * can also form small, mutually symmetrical angles with the respective radial plane ER.
  • the local radius of curvature R1 of the center line M22 is in the outer joint part
  • Joint center plane EM is smaller than the reference radius RB, in the inner joint part is the local radius of curvature R1 'of the center line M23 in the
  • a further advantageous embodiment includes the further features: in the outer joint part, the center line M22 of the ball tracks runs radially from the center joint plane EM to the first side S1 connection side, outside of a reference radius RZ, whose center of radius lies in the joint center plane EM on one of the parallel axes PE, PE * , and in the inner part of the joint, the center line M23 of the ball tracks runs radially from the central joint plane EM to the second side S2, in each case radially outside of a reference radius RZ ', whose center of radius lies in the central joint plane EM on one of the parallel axes PE, PE *.
  • Another favorable embodiment is characterized by the further features: in the outer joint part, the center line M22 of the ball tracks runs radially outside the reference radius RB from the center joint plane EM to the second side S2, and in the inner joint part the center line M23 of the ball tracks runs from the joint center plane EM to first side S1 radially outside of a reference radius RB '.
  • the center line M22 of the ball tracks runs radially from the central joint plane EM to the second side S2 within a reference radius RZ, the center of the radius ME of which in the central joint plane EM lies on one of the parallel axes PE, PE *, in the inner joint part
  • the center line M23 of the ball tracks runs radially from the central joint plane EM to the first side S1 within a reference radius RZ ', the center of the radius ME' of which lies in the central joint plane EM on one of the parallel axes PE, PE *.
  • a further proposal relates to the features: the center lines M22, M23 of the outer ball tracks and inner ball tracks each comprise at least two oppositely curved arc sections which adjoin one another at a turning point, the turning points W22 of the outer ball tracks lie in a track plane BE,
  • the turning points W23 of the inner ball tracks are in a track plane BE, BE * at a distance from the central plane EM to the first side S1, the turning points W22, W23 are each below a maximum of the distance the center lines M22, M23 from the parallel axes PE, PE *.
  • a specific embodiment has the features on the track center lines M22 of the outer ball tracks have a first arc with the radius R1, the center M1 of which is offset in a track plane BE, BE * by a first axial offset 01a from the center plane EM of the joint to the first side S1 lies and is offset by a first radial offset 01 r from a parallel axis PE, PE * to the ball track and then to this arc toward the second side S2 a second arc with the radius R2, the center M2 of which is in the track plane BE, BE * a second axial offset 02a is offset from the center plane EM of the joint to the second side S2 and by a second radial offset 02r, which is greater than the sum of the first radius R1 and the first radial offset Olr, from the parallel axis PE, PE * is offset to the outside, the center lines M23 of the inner ball tracks have a first arc with the radius R1 ⁇ whose center M1 ' in a path ene BE, BE * is
  • the radius of curvature of the center lines M22 of the outer ball tracks decreases in the course from the central plane EM to the first side S1 and the radius of curvature of the Center lines M23 of the inner ball tracks decrease in the course from the center plane EM to the second side S2.
  • the path center lines M22 of the outer ball tracks have a third arc with the radius of curvature R3, which connects tangentially with the same sense of curvature to the first arc with the radius of curvature R1 and whose radius of curvature R3 is smaller than the radius of curvature R1 and
  • Path center lines M23 of the inner ball tracks have a third arc with the radius of curvature R3 ', which connects tangentially with the same sense of curvature to the first arc with the radius of curvature R1' and whose radius of curvature R3 'is smaller than the radius of curvature R1'.
  • the center lines M22, M23 of the ball tracks intersect at an angle of 4 to 32 ° in the central joint plane EM, the tangents T22 ', T23' to the track base lines of the ball tracks of all pairs of tracks having the joint stretched out with an equally large opening angle Form ⁇ .
  • the track shape can be designed such that the radial movement e of the balls over during the movement along the ball tracks the maximum operating angle + ß ma ⁇ / 2 to the value e ⁇ 0.06 ⁇ ß max ⁇ PCR, where ßm a x is the maximum bending angle in radians and PCR is the rolling circle radius of the joint.
  • ßm a x is the maximum bending angle in radians
  • PCR is the rolling circle radius of the joint.
  • a joint of the form described herewith preferably comprises a number of track pairs that can be divided by four.
  • the balls of two adjacent pairs of paths lying in parallel path planes BE, BE * are received in a common cage window of the ball cage.
  • the first side in the path of the path is the connection side of the outer joint part and the second side of the path of the path is the opening side of the outer joint part.
  • the first side of the path is the opening side of the outer joint part and the second side of the path is the connection side of the outer joint part.
  • first side and the second side each define one of the two openings of the outer joint part, one of which is penetrated by the shaft to the inner joint part and the other forms a flange or fastening surface for the outer joint part.
  • Figure 1 shows an inventive joint in a first embodiment of the first solution a) in longitudinal half-section; b) in half cross-section;
  • Figure 2 shows an inventive joint according to Figure 1 a) in axial view; b) in longitudinal section;
  • Figure 3 shows an inventive joint in a first embodiment of the second solution a) in axial view; b) in longitudinal section;
  • FIG. 4 shows a joint according to the invention in a second embodiment of the first solution a) in a longitudinal half-section; b) in half cross-section;
  • Figure 5 shows an inventive joint according to Figure 4 a) in axial view; b) in longitudinal section;
  • Figure 6 shows an inventive joint in a second embodiment of the second solution a) in an axial view; b) in longitudinal section;
  • FIG. 7 shows a joint according to the prior art a) in an axial view; b) in longitudinal section;
  • Figure 8 shows the longitudinal axes and the center lines of the path of the joints according to the invention in a first embodiment a) for the outer joint part b) for the inner joint part;
  • Figure 9 shows the longitudinal axes and the center lines of the joints of the joints according to the invention in a special version a) for the outer joint part b) for the inner joint part;
  • FIG. 10 partial cross sections through a pair of tracks a) a joint according to the invention b) a joint according to the prior art.
  • a joint 11 comprises an outer joint part 12, an inner joint part 13, six torque-transmitting balls 14, three of which can be seen in half section, and a ball cage 15.
  • the cage has a spherical outer surface 16 which is guided in the outer joint part and a spherical inner surface 17 of the cage is guided on the inner joint part, this second contact is not mandatory.
  • the balls 14 are held in circumferentially distributed cage windows 18 in the ball cage 15 in a joint center plane EM.
  • a longitudinal axis L12 is designated on the outer joint part 12 and a longitudinal axis L13 on the inner joint part. The intersection of the longitudinal axes L12, L13 with the central articulation plane EM forms the central articulation point M.
  • the outer joint part 12 has a base 19 which can, for example, merge into a connecting pin, and an opening 20 into which a pin which can be connected to the inner joint part can be inserted.
  • the inner joint part 13 has an insertion opening 21.
  • the position of the base 19 further denotes the axial direction “to the first side S1”, the position of the opening 20 further denotes the axial direction “to the second side S2”. These terms are also used to refer to the inner joint part.
  • the ball contact areas ßm a ⁇ / 2 are drawn in both directions for the maximum flexion angle ⁇ max of the inner joint part 13 relative to the outer joint part 12.
  • the balls 14 are guided in outer ball tracks 22 in the outer joint part and inner ball tracks 23 in the inner joint part, all six of which are formed identically over the circumference.
  • the balls 14 are shown with contact in the bottom of the ball tracks, which need not necessarily be given.
  • the tangents T22 ', T23' to the balls 14 in the contact points with the tracks 22, 23 form an opening angle ⁇ which opens towards the connection side.
  • the center lines M22, M23 of the ball tracks Tangents T22, T23 are drawn on the center lines in the center plane EM, which are parallel to the previously mentioned tangents T22 ', T23'.
  • the angle ⁇ between the said tangents T22, T23 is between 4 and 32 °.
  • FIG. 1 A joint 11 according to the invention in the embodiment according to FIG. 1 is shown in two complete representations. The same details are designated with the same reference numerals as in Figures 1a and 1b.
  • the section shown in illustration b runs according to the section line AA from illustration a in the upper half of the picture through a radial plane R of the joint, which contains the center lines of a pair of tracks 22, 23, and in the lower half of the picture between two pairs of tracks 22, 23.
  • each path pair lies with its center lines M22, M23 in a radial plane ER through the joint, that these radial planes ER are at the same angular distance from one another and that one ball 14 is received by a cage window 18 in the ball cage 15.
  • the radial movement (e) of the ball 14 determines the cage thickness DK and thus the track depth of the ball tracks.
  • the cage thickness DK increases the possible path depth and thus leads to increased containment angles ( ⁇ 22, ⁇ 23) and thus increased load capacity of the balls (Fig.
  • the cage thickness DK in the area of the cage window 18 is preferably less than 8% of the rolling circle radius PCR, that is to say the distance from the center of the joint M to the center of a ball at the intersection of the center lines M22, M23 when the joint is stretched.
  • a joint 11 is shown in an embodiment modified from the embodiment according to FIG. 1. The same details are nevertheless designated by the same reference numerals as in FIGS. 1a and 1b.
  • a joint 11 according to the invention in this second embodiment comprises ball tracks 22, 23 which lie in B. track planes BE, BE *, which are arranged in pairs symmetrically to radial planes ER1, ER2 through the joint.
  • an offset section is shown, which runs along section line FF from illustration a, and in the upper half of the picture runs through one of the plane BE1 * offset parallel to a radial plane ER1 and in the lower half through a radial plane between two pairs of paths.
  • All center lines M22, M23 of the orbital pairs run in the form shown in illustration b, the orbits of four orbital pairs each lying in orbital planes BE1, BE1 *, which are parallel and symmetrical to a first radial plane ER1, and the orbits of four further orbital pairs in Path planes BE2, BE2 * lie parallel and at the same distance from a second radial plane ER2.
  • the path planes contain parallel axes PE, PE * at the smallest distance from the longitudinal axes, which thus form intersection lines between the path planes and a reference plane EX1, EX2 perpendicular to the corresponding radial plane R1, R2.
  • On parallel axes PE, PE * are track center points ME, * arranged ME in the shortest distance from the joint center M.
  • joints arise with twelve or sixteen pairs of tracks 22, 23 and correspondingly twelve or sixteen balls 14.
  • the cage thickness DK of which in the area of the cage window 18 is preferably at most 8% of the rolling circle radius PCR, ie the distance from the center of the path ME to the center of the ball at the intersection of the center lines M22, M23 with the joint extended.
  • the center point ME1 * shown in the representation b is not the center of the joint, but the center of the path curve in one of the path planes BE1, BE1 *.
  • FIGS. 1a and 1b are described below together with reference to Figures 1a and 1b. The same details as there are given the same reference numerals. To this extent, reference is made to the description of FIGS. 1a and 1b.
  • the ball tracks In a departure from the joint according to FIGS. 1a and 1b, the ball tracks have an inverse course. In the stretched position shown, the tangents T22 ' and T23 ' to the balls 14 in the contact points with the tracks 22, 23 form an opening angle ⁇ which opens towards the floor. For the course of the ball tracks, the position of the opening 20 thus designates the first side S1 and the position of the base 19 the second side S2.
  • FIGS. 2a and 2b are described below together with reference to Figures 2a and 2b.
  • a joint 11 according to the invention in the embodiment according to FIG. 4 is shown in two complete sections. The same details are denoted by the same reference symbols as in FIGS. 2a and 2b.
  • FIGS. 7a and 7b are described together below.
  • a UF joint of known design is shown, in which the center lines of the ball tracks run through the joint in radial planes. The same details are denoted by the same reference numerals as in Figures 1a and 2a.
  • section line EE in illustration a a radial section through the central plane of a pair of tracks 22, 23 is shown in illustration b in the upper half of the figure, and the radial section between two track pairs 22, 23 is shown in the lower half of the figure.
  • the outer ball tracks 22 and inner ball tracks 23 of a pair of tracks expand from the bottom 19 of the outer joint part 12 to the opening 20 of the outer joint part 12 and are undercut-free when viewed from the opening side. It is due to the thick-walled configuration of the ball cage 15 in comparison with the joints according to the invention previously shown to refer to Figures 2 and 3.
  • the path center lines M22, M23 each consist of an arc and a straight line connected tangentially to it.
  • FIG. 8a shows the path center line M22 of an outer ball track 22, which runs parallel to a track base line, according to one of FIGS. 1 to 3.
  • the center line M22 of a web in the outer part consists of a first radius R1 around a * is tel Vietnamese M1 01 r with the first axial offset Ola and a radial offset and a second radius R2 with a second axial offset 02a and a second radial offset 02a together ,
  • the transition is indicated by a turning point W22.
  • a straight line G3 parallel to the axis L12, PE, PE * connects tangentially to the second radius R2.
  • the tangent T22 to the center line M22 which intersects a longitudinal axis L12, PE, PE * at the angle ⁇ / 2, is drawn in the center plane EM.
  • a vertical line on the tangent T22 intersects the longitudinal axis L12, PE; PE * in the reference center MB, MBE of a reference radius RB.
  • Another reference radius RZ is plotted around the center of the path M, ME. To the left of the center plane EM towards the first side S1, the center line M22 runs within the radius RB and outside the radius RZ. To the right of the center plane EM towards the second side S2, the center line M22 runs essentially outside the radius RB.
  • e The radial ball movement of a ball on its way along the ball track in relation to the center point M, ME is denoted by e. This corresponds to the minimum thickness of the ball cage in the area of the cage window, whereby a safety surcharge is required to avoid edge girders.
  • FIG. 8b shows the center lines M23 of the associated inner ball tracks 23, which run parallel to the base lines, according to one of FIGS. 1 to 3.
  • the center line M23 of a path 23 in the inner part 13 is composed of a first radius R1 'around a center point M1' and a second radius R2 'around a center point M2'. The transition is indicated by a turning point W23.
  • the second radius R2 ' is followed by a straight line G3' parallel to the axis L13, PE, PE *.
  • the center point M1 ' has an axial offset 01a' and a radial offset 01 r 'and the center point M2' has an axial offset 02a 'and a radial offset 02r'.
  • the tangent T23 to the Center line M23 drawn in which intersects a longitudinal axis L13, PE, PE * at the angle ⁇ / 2.
  • a vertical line on the tangent T23 intersects the longitudinal axis L13, PE; PE * in the reference center MB ', MBE' of a reference radius RB '.
  • Another reference radius R2 ' is plotted around the center of the path M, ME.
  • the center line M23 runs within the radius RB 'and outside the radius RZ'.
  • the center line M23 runs at least predominantly outside the radius RB '.
  • the radial ball movement of a ball on its way along the ball track in relation to the center point M, ME is denoted by e.
  • the two center lines M22, M23 of FIGS. 5a, 5b intersect in the joint center plane EM at the angle ⁇ and are mirror-symmetrical to this center plane.
  • FIG. 9a shows the track center line M22, which runs parallel to a track base line, of an outer ball track 22 in a modified embodiment.
  • the center line M22 of a path in the outer part is composed of a first radius R1 around a center point M1 with the first axial offset 01a and a radial offset 01 r and a second radius R2 with a second axial offset 02a and a second radial offset 02a and a third Radius R3, which adjoins the radius R1 opposite the radius R2, is smaller than this radius R1 and is curved in the same sense, the position of its center M3 not being measured in greater detail.
  • the transition between the first and second radius is indicated by a turning point W22.
  • the tangent T22 and the center line M22 are drawn, which intersect a longitudinal axis L12, PE, PE * at the angle ⁇ / 2.
  • a vertical line on the tangent T22 intersects the longitudinal axis L12, PE; PE * in the reference center MB, MBE of a reference radius RB.
  • Another reference radius is plotted around the center of the path M, ME.
  • the center line 22 runs within the radius RB and outside the radius RZ.
  • the center line M22 predominantly runs outside the radius RB.
  • the radial ball movement of a ball on its way along the ball track in relation to the center point M, ME is denoted by e. This corresponds to the minimum thickness of the ball cage in the area of the cage window. blow to avoid edge beams is required.
  • FIG. 9b shows the track center lines M23 of the associated inner ball tracks 23, which run parallel to the track baselines, in a modified embodiment.
  • the center line M23 of a path 23 in the inner part 13 is made up of a first radius R1 'around a center point M1', a second radius R2 'around a center point M2' and a third radius R3 'which is opposite to the radius R2' at the radius R1 'connects, is smaller than this radius R1 and is curved in the same sense.
  • the second radius R2 ' is followed by a straight line G3' parallel to the axis L13, PE, PE *.
  • the center point M1 ' has an axial offset 01a' and a radial offset 01 r 'and the center point M2' has an axial offset 02a 'and a radial offset 02r'.
  • the position of the center M3 ' is not measured in more detail.
  • the tangent T23 to the center line M23 is drawn, which intersects a longitudinal axis L13, PE, PE * at the angle ⁇ / 2.
  • a vertical line on the tangent T23 intersects the longitudinal axis L12, PE; PE * in the reference center MB ', MBE' of a reference radius RB '.
  • Another reference radius RZ ' is plotted around the center of the path M, ME.
  • the center line M23 runs within the radius RB 'and outside the radius RZ'.
  • the center line M23 runs predominantly outside the radius RB '.
  • the radial ball movement of a ball on its way along the ball track in relation to the center point M, ME is denoted by e.
  • the two center lines M22, M23 of FIGS. 6a, 6b intersect in the joint center plane EM at the angle ⁇ and are mirror-symmetrical to this center plane.
  • FIG. 10a The effects of a thin cage 15 in a joint according to the invention
  • FIG. 10b The thinner cage 15 according to the invention allows larger web wrap angles ⁇ 22, ⁇ 23 in the outer webs 22 and in the inner webs 23. Constant velocity joint with little radial movement of the balls

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Vehicle Body Suspensions (AREA)
  • Rolling Contact Bearings (AREA)
  • Pivots And Pivotal Connections (AREA)

Abstract

L'invention concerne un joint homocinétique se présentant sous la forme d'un joint fixe, caractérisé de la manière suivante: une partie extérieure de joint (12) présente un axe longitudinal (L12) ainsi qu'un premier côté (S1) et un deuxième côté (S2), opposés axialement, et des chemins de billes (22) extérieurs; l'angle d'ouverture ( alpha ) entre les tangentes (T22', T23') aux lignes de base des chemins de billes s'étend du deuxième côté (S2) au premier côté (S1), lorsque le joint est étiré et les axes longitudinaux (L12, L13) coïncident; dans la partie extérieure de joint (12), la ligne médiane (M22) des chemins de billes (22), dans la zone allant du plan médian de joint (EM) jusqu'au premier côté (S1), s'écarte, radialement vers l'intérieur, d'un rayon de référence, dont le centre se trouve à l'intersection d'une perpendiculaire à la tangente (T22) à la ligne médiane (M22) des chemins de billes (22) dans le plan médian de joint (EM) et de l'axe longitudinal (L12); dans la partie intérieure de joint (13), la ligne médiane (M23) des chemins de billes (23), dans la zone allant du plan médian de joint (EM) jusqu'au deuxième côté (S2), s'écarte, radialement vers l'intérieur, d'un rayon de référence, dont le centre se trouve à l'intersection d'une perpendiculaire à la tangente à la ligne médiane (M23) des chemins de billes (23) dans le plan médian de joint (EM) et de l'axe longitudinal (L13); dans la partie extérieure de joint (12), la ligne médiane (M22) des chemins de billes (22), dans la zone allant du plan médian de joint (EM) jusqu'au deuxième côté (S2), est déviée radialement vers l'extérieur au-delà dudit rayon de référence; et dans la partie intérieure de joint (13), la ligne médiane (M23) des chemins de billes (23), dans la zone allant du plan médian de joint (EM) jusqu'au premier côté (S1), est déviée radialement vers l'extérieur au-delà dudit rayon de référence.
PCT/EP2004/006086 2003-08-22 2004-06-05 Joint homocinetique presentant un faible deplacement radial des billes WO2005028894A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US10/568,897 US8430758B2 (en) 2003-08-22 2004-06-05 Constant velocity joint with small radial movements of the balls
JP2006524229A JP4383450B2 (ja) 2003-08-22 2004-06-05 ボールの半径方向運動が少ない等速ジョイント

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE10338718.8 2003-08-22
DE10338718 2003-08-22
DE102004006225A DE102004006225B4 (de) 2003-08-22 2004-02-09 Gleichlaufgelenk mit geringer Radialbewegung der Kugeln
DE102004006225.0 2004-02-09

Publications (1)

Publication Number Publication Date
WO2005028894A1 true WO2005028894A1 (fr) 2005-03-31

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PCT/EP2004/006086 WO2005028894A1 (fr) 2003-08-22 2004-06-05 Joint homocinetique presentant un faible deplacement radial des billes

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JP (1) JP4383450B2 (fr)
WO (1) WO2005028894A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140243104A1 (en) * 2011-11-11 2014-08-28 Ntn Corporation Fixed type constant-velocity universal joint
WO2023237214A1 (fr) * 2022-06-10 2023-12-14 Gkn Driveline International Gmbh Joint à contre-voie

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5912419B2 (ja) 2011-06-07 2016-04-27 Ntn株式会社 固定式等速自在継手
JP6113459B2 (ja) * 2012-11-08 2017-04-12 Ntn株式会社 固定式等速自在継手
JP6890485B2 (ja) * 2017-07-03 2021-06-18 Ntn株式会社 固定式等速自在継手

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4968287A (en) * 1989-02-16 1990-11-06 Uni-Cardan Ag Constant velocity ratio universal joint
US5122096A (en) * 1989-11-30 1992-06-16 Lohr & Bromkamp Gmbh Constant velocity ratio universal joint
JPH07317791A (ja) * 1994-03-30 1995-12-08 Toyoda Mach Works Ltd 等速ジョイント
FR2799519A1 (fr) * 1999-10-08 2001-04-13 Pierre Guimbretiere Joint homocinetique fixe a billes
DE10060220A1 (de) 2000-12-04 2002-06-13 Gkn Automotive Gmbh Gleichlauffestgelenk

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4968287A (en) * 1989-02-16 1990-11-06 Uni-Cardan Ag Constant velocity ratio universal joint
US5122096A (en) * 1989-11-30 1992-06-16 Lohr & Bromkamp Gmbh Constant velocity ratio universal joint
JPH07317791A (ja) * 1994-03-30 1995-12-08 Toyoda Mach Works Ltd 等速ジョイント
FR2799519A1 (fr) * 1999-10-08 2001-04-13 Pierre Guimbretiere Joint homocinetique fixe a billes
DE10060220A1 (de) 2000-12-04 2002-06-13 Gkn Automotive Gmbh Gleichlauffestgelenk

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 1996, no. 04 30 April 1996 (1996-04-30) *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140243104A1 (en) * 2011-11-11 2014-08-28 Ntn Corporation Fixed type constant-velocity universal joint
US9206855B2 (en) * 2011-11-11 2015-12-08 Ntn Corporation Fixed type constant-velocity universal joint
WO2023237214A1 (fr) * 2022-06-10 2023-12-14 Gkn Driveline International Gmbh Joint à contre-voie

Also Published As

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JP2007503554A (ja) 2007-02-22
JP4383450B2 (ja) 2009-12-16

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