WO2019009014A1 - Joint homocinétique de type fixe - Google Patents

Joint homocinétique de type fixe Download PDF

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Publication number
WO2019009014A1
WO2019009014A1 PCT/JP2018/022121 JP2018022121W WO2019009014A1 WO 2019009014 A1 WO2019009014 A1 WO 2019009014A1 JP 2018022121 W JP2018022121 W JP 2018022121W WO 2019009014 A1 WO2019009014 A1 WO 2019009014A1
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WO
WIPO (PCT)
Prior art keywords
track
track groove
center line
joint member
center
Prior art date
Application number
PCT/JP2018/022121
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English (en)
Japanese (ja)
Inventor
雅司 船橋
輝明 藤尾
Original Assignee
Ntn株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ntn株式会社 filed Critical Ntn株式会社
Publication of WO2019009014A1 publication Critical patent/WO2019009014A1/fr

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    • 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
    • F16D3/224—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

Definitions

  • the present invention relates to a fixed type constant velocity universal joint.
  • a constant velocity universal joint that constitutes a power transmission system of an automobile or various industrial machines connects two shafts on the drive side and the driven side in a torque transmittable manner, and transmits rotational torque at a constant speed even when the two axes operate at an operating angle. can do.
  • Constant velocity universal joints are roughly classified into fixed type constant velocity universal joints that allow only angular displacement, and sliding constant velocity universal joints that allow both angular displacement and axial displacement, for example, from an automobile engine
  • sliding constant velocity universal joints are used on the differential side (inboard side)
  • fixed constant velocity universal joints are used on the driving wheel side (outboard side) Ru.
  • a Zeppa type constant velocity universal joint and an undercut free type constant velocity universal joint are known as fixed type constant velocity universal joints.
  • Patent Document 1 In order to achieve higher load capacity than the fixed type constant velocity universal joint described above, there has been proposed a fixed type constant velocity universal joint in which two pairs of adjacent track grooves are formed on planes parallel to each other ( Patent Document 1).
  • the present invention has an object to provide a lightweight and compact fixed type constant velocity universal joint capable of securing a large load capacity even in a normal angle range.
  • the present inventors arranged track grooves in a radial plane and three pairs of first track grooves arranged in a plane parallel to the radial plane.
  • the present invention has been made based on the idea of comprising three second track grooves and arranging the first track groove and the second track groove opposite in the diameter direction.
  • the present invention provides an outer joint member in which a plurality of track grooves extending in the longitudinal direction are formed on the spherical inner peripheral surface, and has an axially spaced opening side and back side.
  • An inner joint member in which a plurality of track grooves extending in the longitudinal direction are formed on the spherical outer peripheral surface so as to face the track grooves of the outer joint member; a torque transmitting ball incorporated between the opposing track grooves;
  • the track groove 7 of the outer joint member is The track center line of the first track grooves 7A, 7B is composed of three pairs of first track grooves 7A, 7B arranged at equal intervals in the circumferential direction and three second track grooves 7C.
  • X a, X B is, Radial plane A track groove plane B extending in parallel with the symmetry a and distance to containing the axis N-N of the hand, is disposed on B ', the track center line X C of the second track groove. 7C, It is disposed on the radial plane A and at a position diametrically opposed to the pair of first track grooves 7A, 7B, and the track center line X A , X of the first track grooves 7A, 7B. B has an offset has been arcuate portion in the axial direction of the outer joint member center of curvature with respect to the projection center O ', the track center line X C of the second track groove.
  • the center of curvature joint A plane P having an arc-shaped portion offset in the axial direction of the outer joint member with respect to a center O and including the joint center O at a working angle of 0 ° and orthogonal to an axis N-N of the joint;
  • Trajectory centerlines X A , X B of the first track grooves 7A, 7B and The intersections C A , C B and C C of the second track groove 7C with the track center line X C are disposed on one circle D in the plane P, and the track groove of the inner joint member
  • the track center line Y of 9 is characterized in that it is formed in mirror symmetry with the track center line X of the track groove 7 which is a pair of the outer joint members with the plane P as a reference.
  • the offset of the center of curvature of the arc-shaped portion is provided toward the back side of the outer joint member. Thereby, the strength of the outer joint member at the high operating angle can be further improved.
  • the first track groove 7A above, 7B track center line X A, X B and the center of curvature of the raceway center line X C of the second track groove 7C is radially offset with respect to the axis N-N of the joint Is preferred. Thereby, the track groove depth at the high operation angle can be adjusted.
  • the track center lines X Ab , X Bb and X Cb of the above-mentioned high operating angle track grooves 7Ab, 7Bb and 7Cb are the track center lines X A and X B of the first track grooves 7A and 7B and the second track groove 7C. It is preferred that the arcuate portion of the track center line X C is a circular arc shape that is curved to the opposite side. Thereby, the track groove shape suitable for achieving a high operating angle can be formed.
  • the strength of the cage is increased by increasing the width of the pillars of the cage by having a pocket for accommodating the two torque transfer balls incorporated in each pair of first track grooves 7A, 7B. It can be improved.
  • FIG. 3 is a longitudinal cross-sectional view of the fixed type constant velocity universal joint according to the first embodiment of the present invention taken along the line A1-N in FIG. 2. It is what rotated 180 degree
  • FIG. 2 is an exploded perspective view of the outer joint member, the cage, the ball and the inner joint member of FIG. 1a. It is explanatory drawing which shows the contact state of the track groove and ball
  • FIG. 3 is a longitudinal cross-sectional view of the fixed type constant velocity universal joint according to a second embodiment of the present invention taken along line A1-N in FIG.
  • FIG. 5 is a longitudinal cross-sectional view of the fixed type constant velocity universal joint according to the third embodiment of the present invention taken along the line A1-N in FIG.
  • the fixed-type constant velocity universal joint which concerns on the 3rd Embodiment of this invention is shown, and the longitudinal cross-sectional view along the B1-N 'line of FIG. 2 is rotated 180 degrees clockwise.
  • FIG. 5 is a longitudinal cross-sectional view of the fixed type constant velocity universal joint according to the fourth embodiment of the present invention taken along the line A1-N in FIG.
  • FIG. 6 is a longitudinal cross-sectional view of the fixed type constant velocity universal joint according to the fifth embodiment of the present invention taken along the line A1-N in FIG.
  • the fixed-type constant velocity universal joint which concerns on the 5th Embodiment of this invention is shown, and the longitudinal cross-sectional view along the B1-N 'line of FIG. 2 is rotated 180 degrees clockwise.
  • FIG. 7 is a longitudinal cross-sectional view of the fixed type constant velocity universal joint according to the sixth embodiment of the present invention taken along the line A1-N in FIG.
  • the fixed-type constant velocity universal joint which concerns on the 6th Embodiment of this invention is shown, and the longitudinal cross-sectional view along the B1-N 'line of FIG. 2 is rotated 180 degrees clockwise.
  • FIG. 1a is a longitudinal sectional view taken along the line A1-N of FIG. 2
  • FIG. 1b is a longitudinal sectional view taken along the line B1-N 'of FIG. 2 is a right side view of FIG. 1a
  • FIG. 3 is an exploded perspective view of an outer joint member, a cage, a ball and an inner joint member as viewed from the upper right side of FIG. 1b
  • FIG. 4 is an explanatory view showing a contact state of the track groove of the inner joint member and the ball.
  • the fixed type constant velocity universal joint 1 mainly includes an outer joint member 2, an inner joint member 3, a torque transmitting ball (also simply referred to as a ball) 4 and a retainer 5.
  • three pairs of first track grooves 7A1, 7B1, 7A2, 7B2, 7A3, 7B3 and three second track grooves 7C1, 7C2 are formed on the spherical inner peripheral surface 6 of the outer joint member 2.
  • 7C3 in total, nine track grooves are formed in the longitudinal direction.
  • the spherical outer peripheral surface 8 of the inner joint member 3 includes three pairs of first track grooves 9A1, 9B1, 9A2, which face the first track grooves 7A1, 7B1, 7A2, 7B2, 7A3, 7B3 of the outer joint member 2, A total of nine track grooves 9 in the longitudinal direction, 9B2, 9A3, 9B3 and three second track grooves 9C1, 9C2, 9C3 facing the second track grooves 7C1, 7C2, 7C3 of the outer joint member 2 It is formed.
  • Nine balls 4 for transmitting torque are incorporated between the track groove 7 of the outer joint member 2 and the track groove 9 of the inner joint member 3 one by one.
  • first track grooves 7A1, 7B1, 7A2, 7A2, 7B2, 7A3 and 7B3 of the outer joint member 2 and the second track grooves 7C1, 7C2 and 7C3 are collectively referred to as symbols.
  • first track grooves 9A1, 9B1, 9A2, 9B2, 9A3, 9B3 and the second track grooves 9C1, 9C2, 9C3 of the inner joint member 3 are collectively referred to using 7, reference numeral 9 is used.
  • a cage 5 for holding the ball 4 is disposed between the spherical inner peripheral surface 6 of the outer joint member 2 and the spherical outer peripheral surface 8 of the inner joint member 3.
  • the ball 4 is accommodated in the pocket 5 a of the retainer 5.
  • the spherical outer peripheral surface 12 of the cage 5 slidably fits on the spherical inner peripheral surface 6 of the outer joint member 2, and the spherical inner peripheral surface 13 of the cage 5 slides on the spherical outer peripheral surface 8 of the inner joint member 3 It fits freely and is guided.
  • the three pairs of first track grooves 7A, 7B of the outer joint member 2 are a first pair of track grooves 7A1, 7B1, a second pair of track grooves 7A2, 7B2 and a third pair. It comprises a pair of track grooves 7A3 and 7B3.
  • the three pairs of first track grooves 9A, 9B of the inner joint member 3 are the first pair of track grooves 9A1, 9B1, the second pair of track grooves 9A2, 9B2 and the third pair of track grooves. It consists of 9A3 and 9B3.
  • the first track grooves 7A and 7B of the outer joint member 3 will be described.
  • the first pair of track grooves 7A1, 7B1 is spaced apart on either side of the radial plane A1 including the joint axis N-N (see FIG. 1a) They are arranged and formed symmetrically with respect to the radial plane A1. That is, the track center line X A (see FIG.
  • the track groove plane B1 and the track groove plane B′1 are symmetrical to each other with respect to the radial plane A1.
  • the second pair of track grooves 7A2 and 7B2 includes the joint axis N-N and is spaced on either side of the radial plane A2, which is at an angle of 120 ° clockwise with respect to the radial plane A1. , And are formed symmetrically with respect to the radial plane A2.
  • the track center line X A (not shown) of the second pair of track grooves 7A2 is disposed on the track groove plane B2 extending parallel to the radial plane A2 at a distance, and the track center line X B of the track groove 7B2
  • the (not shown) is disposed on the track groove plane B′2 extending in parallel with a space on the side opposite to the track groove plane B2 with respect to the radial plane A2.
  • the track groove plane B2 and the track groove plane B′2 are also symmetrical with respect to the radial plane A2.
  • the third pair of track grooves 7A3, 7B3 includes the joint axis N-N and is spaced apart on either side of a radial plane A3 that forms an angle of 240 ° clockwise with respect to the radial plane A1. , And are formed symmetrically with respect to the radial plane A3.
  • the track center line X A (not shown) of the third pair of track grooves 7A3 is disposed on the track groove plane B3 extending parallel to the radial plane A3 at a distance, and the track center line X B of the track groove 7B3. (Not shown) are disposed on a track groove plane B'3 extending in parallel with a gap on the side opposite to the track groove plane B3 with respect to the radial plane A3.
  • the track groove plane B3 and the track groove plane B'3 are also symmetrical with respect to the radial plane A3.
  • the axial shape of the first track grooves 7A, 7B of the outer joint member 2 will be described based on FIG. 1b.
  • the first track groove 7A1 is composed of an arc-shaped reference track groove 7A1a and a high operating angle track groove 7A1b.
  • Raceway center line X Aa of the reference track groove portion 7A1a is offset (offset amount f1) in the axial direction toward the inner side of the outer joint member 2 relative to the projection center O ', and radially offset (offset amount f2 Is formed in an arc shape having a center of curvature O1.
  • the track groove depth can be adjusted at high operating angles.
  • the projection center O ' means a point where the joint center O located on the NN line is horizontally projected on the N'-N' line. Therefore, the axial positions of the joint of the projection center O ′ and the joint center O are the same.
  • the relationship between the projection center O 'and the joint center O is the same as for the first track grooves 9A and 9B of the inner joint member 3.
  • the track center line X Aa of the reference track groove portion 7A1a means an arcuate portion where the first track groove 7A in the claims, the track center line X A of 7B, is X B has.
  • the track center line X Ab of the high operating angle track groove portion 7A1 b is axially offset (offset amount f3) toward the opening side of the outer joint member 2 with respect to the projection center O 'and offset in the radial direction (offset) It is formed in the shape of a circular arc having the curvature center O2 which is the amount f4).
  • the track center line X Ab of the high operating angle track groove 7A1 b and the track center line X Aa of the reference track groove 7 A1 a are connected smoothly on a straight line passing through the center of curvature O1 and the middle O2 of curvature although not shown. . This connection point is located on the opening side of the outer joint member 2 with respect to the projection center O ′.
  • the first track groove 7A1 is a high operating angle track groove portion 7A1b the outer joint member 2 having a raceway center line X Ab whose shape is different from that of the raceway center line X Aa of the reference track groove portion 7A1a forming the arcuate portion
  • the track center line X Ab of high operating angle track groove portion 7A1b, the arcuate portion of the track center line X Aa of the reference track groove portion 7A1a an arcuate shape that is curved to the opposite side.
  • the track groove shape suitable for high operation can be formed.
  • the ball 4 located on the bisector plane is located in the high operating angle track groove 7A1 b.
  • the working angle when the ball 4 is shifted from the reference track groove 7A1a to the high working angle track groove 7A1b is preferably set to about 10 ° to 15 ° which exceeds the normal angle range.
  • the second track groove 7C of the outer joint member 2 will be described.
  • the second track groove 7C is composed of three track grooves 7C1, 7C2, and 7C3.
  • the track center line X C (see FIG. 1a) of the second track groove 7C1 (see FIG. 1a) is disposed on the radial plane A1 including the joint axis NN, and the track center line X of the first track groove 7A1, 7B1. They are disposed at positions diametrically opposed to a pair of A 1 and X B (X B is not shown).
  • the track center line X C (not shown) of the second track groove 7C2 includes the joint axis N-N, and is disposed on the radial plane A2 that forms an angle of 120 ° clockwise with respect to the radial plane A1.
  • the first track grooves 7A2 and 7B2 are disposed at positions diametrically opposite to a pair of track center lines X A and X B (not shown).
  • the track center line X C (not shown) of the second track groove 7C3 includes the joint axis N-N, and is disposed on the radial plane A3 that forms an angle of 240 ° clockwise with respect to the radial plane A1.
  • the first track grooves 7A3 and 7B3 are disposed at positions diametrically opposite to a pair of track center lines X A and X B (not shown) of the first track grooves 7A3 and 7B3.
  • the axial shape of the second track groove 7C will be described based on FIG. 1a.
  • the illustrated second track grooves 7C1 will be described.
  • the second track groove 7C1 is also composed of a circular reference track groove 7C1a and a high operating angle track groove 7C1b.
  • the track center line X Ca of the reference track groove 7C1a is axially offset (offset amount f5) toward the back side of the outer joint member 2 with respect to the joint center O, and offset in the radial direction (offset amount f6) It is formed in an arc shape having a center of curvature O5.
  • Raceway center line X Cb high operating angle track groove portion 7C1b is axially offset toward the opening side of the outer joint member 2 relative to the joint center O (the offset amount f7), and radially offset (offset amount f8) It is formed in the shape of a circular arc having the curvature center O6.
  • the second track groove 7C1 is high operating angle track groove 7C1b the outer joint member 2 having a raceway center line X Cb whose shape is different from that of the raceway center line X Ca reference track groove portion 7C1a forming the arcuate portion
  • the track center line X Cb high operating angle track groove portion 7C1b, the arcuate portion of the track center line X Ca reference track groove portion 7C1a an arcuate shape that is curved to the opposite side.
  • the track groove shape suitable for high operation can be formed.
  • the ball 4 located on the bisector plane is located in the high operating angle track groove 7C1b.
  • the operating angle when the ball 4 in the second track groove 7C1 transitions from the reference track groove 7C1a to the high operating angle track groove 7C1b is the same as the transition operating angle of the first track groove 7A1b.
  • the said transfer operation angle is the same also in the inner side coupling member 3 mentioned later.
  • the first track grooves 9A and 9B of the inner joint member 3 will be described.
  • the first pair of track grooves 9A1 and 9B1 is a radial plane A1 including the joint axis N-N. Are spaced apart from each other and are formed symmetrically with respect to the radial plane A1. That is, the track center line Y A (see FIG.
  • the track groove plane B1 and the track groove plane B'1 are symmetrical to each other with respect to the radial plane A1.
  • the second pair of track grooves 9A2, 9B2 includes the joint axis N-N and is spaced on either side of a radial plane A2 that is at an angle of 120 ° clockwise with respect to the radial plane A1. , And are formed symmetrically with respect to the radial plane A2.
  • the track center line Y A (not shown) of the second pair of track grooves 9A2 is disposed on the track groove plane B2 extending parallel to the radial plane A2 at a distance, and the track center line Y B of the track groove 9B2
  • the (not shown) is disposed on the track groove plane B′2 extending in parallel with a space on the side opposite to the track groove plane B2 with respect to the radial plane A2.
  • the track groove plane B2 and the track groove plane B′2 are symmetrical to each other with respect to the radial plane A2.
  • the third pair of track grooves 9A3, 9B3 includes the joint axis N-N and is spaced apart on either side of a radial plane A3 which is at an angle of 240 ° clockwise with respect to the radial plane A1. , And are formed symmetrically with respect to the radial plane A3.
  • the track center line Y A (not shown) of the third pair of track grooves 9A3 is disposed on the track groove plane B3 extending parallel to the radial plane A3 at a distance, and the track center line Y B of the track groove 9B3. (Not shown) are disposed on a track groove plane B'3 extending in parallel with a gap on the side opposite to the track groove plane B3 with respect to the radial plane A3.
  • the track groove plane B3 and the track groove plane B'3 are mutually symmetrical with respect to the radial plane A3.
  • the axial shape of the first track grooves 9A, 9B of the inner joint member 3 will be described based on FIG. 1b.
  • the first track groove 9A1 is composed of an arc-shaped reference track groove 9A1a and a high operating angle track groove 9A1b.
  • Raceway center line Y Aa of the reference track groove portion 9A1a is offset (offset amount f1) in the axial direction toward the opening side of the outer joint member 2 relative to the projection center O ', and radially offset (offset amount f2 Is formed in an arc shape having a center of curvature O3.
  • the track center line Y Ab of the high operating angle track groove portion 9A1 b is axially offset (offset amount f3) toward the back side of the outer joint member 2 with respect to the projection center O 'and offset in the radial direction (offset) It is formed in the shape of a circular arc having the curvature center O4 which is the amount f4).
  • the first track groove 9A1 is a high operating angle track groove portion 9A1b the outer joint member 2 having a raceway center line Y Ab whose shape is different from that of the raceway center line Y Aa of the reference track groove portion 9A1a forming the arcuate portion
  • the track center line Y Ab of high operating angle track groove portion 9A1b, the arcuate portion of the track center line Y Aa of the reference track groove portion 9A1a an arcuate shape that is curved to the opposite side.
  • the second track groove 9C of the inner joint member 2 will be described.
  • the second track groove 9C is composed of three track grooves 9C1, 9C2 and 9C3.
  • the track center line Y C of the second track groove 9C1 (see FIG. 1a) is disposed on the radial plane A1 including the joint axis NN, and the track center line Y of the first track groove 9A1 and 9B1. It is disposed at a position diametrically opposite to a pair of A 1 and Y B (Y B is not shown).
  • the track center line Y C (not shown) of the second track groove 9C2 includes the joint axis N-N, and is disposed on the radial plane A2 that forms an angle of 120 ° clockwise with respect to the radial plane A1.
  • the first track grooves 9A2 and 9B2 are disposed at positions diametrically opposite to a pair of track center lines Y A and Y B (not shown) of the first track grooves 9A2 and 9B2.
  • the track center line Y C (not shown) of the second track groove 9C3 includes the joint axis N-N, and is disposed on the radial plane A3 that forms an angle of 240 ° clockwise with respect to the radial plane A1.
  • the first track grooves 9A3 and 9B3 are disposed at positions diametrically opposed to a pair of track center lines Y A and Y B (not shown) of the first track grooves 9A3 and 9B3.
  • the axial shape of the second track groove 9C of the inner joint member 3 will be described based on FIG. 1a. Similar to the case of the outer joint member 2 described above, the illustrated second track groove 9C1 of the second track groove 9C will be described. Similar to the first track groove 9A1, the second track groove 9C1 is also composed of an arc-shaped reference track groove 9C1a and a high operating angle track groove 9C1b. Raceway center line Y Ca of the reference track groove portion 9C1a is offset (offset amount f5) in the axial direction toward the opening side of the outer joint member 2 relative to the joint center O, and radially offset (offset amount f6) It is formed in a circular arc shape having a center of curvature O7.
  • Raceway center line Y Cb high operating angle track groove portion 9C1b is offset axially toward the inner side of the outer joint member 2 relative to the joint center O (the offset amount f7), and radially offset (offset amount f8) It is formed in a circular arc shape having the curvature center O8.
  • the second track groove 9C1 is high operating angle track groove 9C1b the outer joint member 2 having a raceway center line Y Cb whose shape is different from that of the raceway center line Y Ca of the reference track groove portion 9C1a forming the arcuate portion
  • the track center line Y Cb high operating angle track groove portion 9C1b, the arcuate portion of the track center line Y Ca of the reference track groove portion 9C1a an arcuate shape that is curved to the opposite side.
  • specific track grooves 7A1, 7C1, 9A1, and 9C1 have been described as an example in order to make the alignment with the drawing accurate, but the contents are the same as in the other track grooves. That is, among the three pairs of first track grooves 7A1, 7B1, 7A2, 7B2, 7A3, 7B3 of the outer joint member 2, the first track grooves 7A1, 7A2, 7A3 have the same shape as each other, and the first track grooves The grooves 7B1, 7B2, 7B3 have the same shape.
  • the first track grooves 7A1 and 7B1 are symmetrical with respect to the radial plane A1, and the first track grooves 7A2 and 7B2 are symmetrical with respect to the radial plane A2 and are relative to the radial plane A3.
  • the first track grooves 7A3 and 7B3 are symmetrical. Therefore, except for the relationship that the first track grooves 7A1, 7A2, 7A3 and the first track grooves 7B1, 7B2, 7B3 are symmetrical with respect to the radial plane A1, A2, A3, each track groove is
  • the shapes of 7A and 7B are the same.
  • the second track grooves 7C1, 7C2, 7C3 have the same shape.
  • the reference numeral X is used for the track groove of the inner joint member 3
  • the orbital centerline Y A , Y B , Y C , Y Aa , Y Ab , Y Ca , and Y Cb are collectively referred to, the symbol Y is used.
  • offset amounts f1 to f8 indicating the positions of the centers of curvature of the track center line X of the track groove 7 of the outer joint member 2 and the track center line Y of the track groove 9 of the inner joint member 3 described above.
  • the offset amounts mean that the dimensions are equal to one another. The same applies to the following embodiments.
  • the track center line Y of the track groove 9 of the inner joint member 3 includes the joint center O at the operating angle of 0 °.
  • a plane P (see FIGS. 1a and 1b) orthogonal to the axis N-N of the optical axis, it is formed in mirror symmetry with the track center line X of the track groove 7 as a pair of outer joint members 2.
  • FIG. 3 shows the ball 4 housed in the pocket 5 a of the holder 5.
  • retainer 5 can be made to increase, and intensity
  • the balls 4 assembled in the second track grooves 7C and 9C are accommodated one by one in the pocket 5a2.
  • the reason why the circumferential interval between the track center lines X A , X B , Y A and Y B of the first track grooves 7 A, 7 B, 9 A and 9 B to be paired can be set small will be described.
  • the track groove planes B1 and B′1 are formed parallel to the radial plane A1
  • the planes B2 and B′2 are formed parallel to the radial plane A2
  • the track groove planes B3 and B′3 It is formed parallel to the radial plane A3. That is, the first track groove 7A, 7B, 9A, 9B of the track center line X A, X B, Y A , Y B is a radial plane A1 or radial plane A2, are formed parallel to the radial plane A3 ing. For this reason, the thickness reduction of the rib portion 3a (see FIG.
  • FIG. 4 shows the contact state between the track groove 9 of the inner joint member 3 and the ball 4 in the state where the operating angle is 0 °.
  • the first track groove 9A, 9B and the ball 4 contact with the track groove plane B, B 'at a contact angle ⁇ , and the second track groove 9C and the ball 4 contact angle with the radial plane A Contact with ⁇ .
  • the points of intersection of the lines X A and X B and the track center line X C of the second track groove 7 C are C A and C B and C C shown in FIG.
  • Each of the intersections C A , C B and C C is disposed on one circle D in the plane P. In other words, as shown in FIG.
  • a plane P including the joint center O at an operating angle of 0 ° in the present specification and claims and orthogonal to the axis N-N of the joint, and an orbital center line X A of the first track grooves 7A and 7B , X B and the intersections C A , C B and C C of the second track groove 7 C with the track center line X C are arranged on one circle D in the plane P, the above concept Used in the sense that
  • the ball 4 on one side of the paired track grooves 9A1 and 9B1 transmits most of the torque.
  • a torque transfer direction vector f ′ generated in the ball 4 ′ on the track groove plane B′1 The contact direction vector b 'of the ball 4' and the track groove 9B1 intersects at a large angle, that is, near a straight line.
  • the torque transfer direction vector f generated on the ball 4 on the track groove plane B1 and the contact direction vector b of the track groove 9A1 intersect at a small angle, that is, in a bent state.
  • the ball 4 'of the track groove 9B1 transmits most of the torque between the pair of track grooves 9A1 and 9B1, and the ball 4 of the track groove 9A1 can hardly transmit the torque.
  • the ball 4 'on one side of the three pairs of first track grooves 9A, 9B (three half of six) transmits most of the torque, and the ball 4 on the other side has most of the torque I can not communicate. This state is the same as when the torque is applied in the opposite direction to the white arrow.
  • all of the three balls 4 ′ ′ transmit torque with respect to the second track grooves 9C.
  • the second track grooves 9C and the balls 4 “Is in contact with the radial plane A at a contact angle ⁇ .
  • the torque transfer direction vector f "generated on the ball 4" on the radial plane A1 and the contact direction vector b "of the ball 4" and the track groove 9C1 intersect at a large angle.
  • the other track grooves 9C2 and 9C3 are in the same state. Therefore, when torque is applied by rotating the inner joint member 3 in the direction of the white arrow, all three balls 4 ′ ′ of the track groove 9C can transmit torque. Further, the reverse of the white arrow. The same applies when torque is applied in the direction.
  • the contact state between the track groove 7 and the ball 4 of the outer joint member 2 and the torque load characteristic are not illustrated, but the same as the contact state between the track groove 9 and the ball 4 of the inner joint member 2 described above and the torque load characteristic. It is.
  • the track grooves 7, 9 include three pairs of first track grooves 7A, 9A, 7B, 9B and three second track grooves 7C, 9C, so always, three balls 4 (or 4 ') of the first track grooves 7A, 9A, 7B, 9B and three balls 4 of the second track grooves 7C, 9C.
  • the torque is transmitted by a total of six balls, and the torque is shared more evenly by arranging nine balls 4, 4 ', 4' 'on the same circumference on the plane P as described above. The load capacity and durability can be ensured even in the normal angle range.
  • the second track groove 7C, 9C raceway center line Xc of, Y C is the first track groove 7A, 7B, 9A, raceway center line X A of 9B, X B, Y A, a pair of Y B
  • the track load in the high operating angle range is suppressed, and the ball at the open end of the track groove 7 of the outer joint member 2 at an ultra-high operating angle exceeding 50 ° 4 is smooth, and is suitable as a fixed type constant velocity universal joint for an ultra-high operating angle.
  • FIGS. 5a and 5b The cross section of the fixed type constant velocity universal joint of this embodiment is substantially the same as FIG. 2 of the first embodiment, so FIG. 2 is used mutatis mutandis.
  • FIG. 5a is a longitudinal sectional view taken along the line A1-N of FIG. 2
  • FIG. 5b is a 180.degree. Clockwise rotation of the longitudinal sectional view taken along the line B1-N 'of FIG.
  • the fixed type constant velocity universal joint 1 of this embodiment is the position of the curvature center of the track center line of the reference track groove portion of the track grooves 7 and 9 of the outer joint member 2 and the inner joint member 3 with respect to the first embodiment. Is different.
  • the center of curvature of the track center line of the reference track groove portion is located on the joint axis NN and the N'-N 'line, and there is no radial offset.
  • the other configurations are the same as those of the first embodiment, and therefore, portions having similar functions are denoted by the same reference numerals.
  • the contents described in the first embodiment are applied mutatis mutandis, and the different points will be described. The same applies to the following embodiments.
  • the raceway center line X Aa of the reference track groove portion 7A1a of the first track groove 7A1 of the outer joint member 2 with respect to 'the projection center O on the line'N'-N having a center of curvature O1 1 that is offset (offset amount f1 1) toward the inner side of the outer joint member 2.
  • Raceway center line Y Aa of the reference track groove portion 9A1a of the first track groove 9A1 of the inner joint member 3, N'-N 'line in the projection center O' toward the opening side of the outer joint member 2 relative to the offset ( The offset amount f1 1 ) has a curvature center O3 1 .
  • the curvature centers O1 1 and O3 1 are not provided with any radial offset.
  • the track center line X Ca of the reference track groove portion 7C1a of the second track groove 7C1 of the outer joint member 2 is at the joint center O with respect to the joint center O on the joint axis NN. having a center of curvature O5 1 that is offset (offset amount f5 1) toward the rear side.
  • the track center line Y Ca of the reference track groove portion 9C1a of the second track groove 9C1 of the inner joint member 3 is offset toward the opening side of the outer joint member 2 with respect to the joint center O on the joint axis NN
  • the offset amount f5 1 ) has a curvature center O 7 1 .
  • the curvature centers O5 1 and O7 1 also have no radial offset.
  • FIGS. 6a and 6b A fixed type constant velocity universal joint according to a third embodiment of the present invention will be described based on FIGS. 6a and 6b.
  • the raceway center line X Aa of the reference track groove portion 7A1a of the first track groove 7A1 of the outer joint member 2 with respect to 'the projection center O on the line'N'-N It is formed in an arc shape having an offset (offset amount f1 2) has been the center of curvature O1 2 toward the inner side of the outer joint member 2.
  • Raceway center line Y Aa of the reference track groove portion 9A1a of the first track groove 9A1 of the inner joint member 3, N'-N 'line in the projection center O' toward the opening side of the outer joint member 2 relative to the offset ( is formed in an arc shape having an offset amount f1 2) has been the center of curvature O3 2. Center of curvature O1 2, O3 2 is not provided any radial offset.
  • the track center line X Ab of the high working angle track groove portion 7A1b of the first track groove 7A1 of the outer joint member 2 is inclined at an angle ⁇ so as to approach the N'-N 'line toward the opening side of the outer joint member 2
  • the track center line Y Ab of the high working angle track groove portion 9A1b of the first track groove 9A1 of the inner joint member 3 which is formed in an inclined linear shape is a N'-N 'line toward the back side of the outer joint member 2 Are formed in a straight line inclined at an inclination angle ⁇ .
  • the inclination angle ⁇ becomes about 10 ° to 15 ° beyond the normal angle range as described above when the ball 4 is shifted from the reference track groove portions 7A1a and 9A1a to the high operation angle track groove portions 7A1b and 9A1b. Is set as.
  • the inclination angle ⁇ is the same in the second track grooves 7C1 and 9C1 described later.
  • the track center line X Ca of the reference track groove portion 7C1a of the second track groove 7C1 of the outer joint member 2 is on the joint line O with respect to the joint center O on the joint axis NN. It is formed in an arc shape having an offset (offset amount f5 2) has been the center of curvature O5 2 toward the rear side.
  • the track center line Y Ca of the reference track groove portion 9C1a of the second track groove 9C1 of the inner joint member 3 is offset toward the opening side of the outer joint member 2 with respect to the joint center O on the joint axis NN It is formed in the shape of a circular arc having the curvature center O72 2 with the offset amount f5 2 ). Center of curvature O5 2, O7 2 also radial offset is not provided.
  • the track center line X Cb of the high working angle track groove portion 7C1b of the second track groove 7C1 of the outer joint member 2 is inclined at an angle ⁇ so as to approach the joint axis N-N toward the opening side of the outer joint member 2 is formed on the inclined straight raceway center line Y Cb high operating angle track groove portion 9C1b of the second track groove 9C1 of the inner joint member 3, the joint toward the rear side of the outer joint member 2 axis N-N Are formed in a straight line inclined at an inclination angle ⁇ .
  • a fixed type constant velocity universal joint according to a fourth embodiment of the present invention will be described based on FIGS. 7a and 7b.
  • the fixed type constant velocity universal joint 1 of this embodiment differs from the first embodiment in that the high operating angle track groove is not provided in the track grooves 7 and 9 of the outer joint member 2 and the inner joint member 3. .
  • Raceway center line Y Aa of the reference track groove portion 9A1a of the first track groove 9A1 of the inner joint member 3 is offset toward the opening side of the outer joint member 2 relative to the projection center O '(the offset amount f1 3), It is formed in an arc shape having a curvature center O3 3 offset in the radial direction (offset amount f2 3 ). And, the track center lines X Aa and Y Aa of the reference track groove portions 7A1a and 9A1a are formed in a uniform arc shape over the entire axial direction of the track grooves 7A1 and 9A1.
  • the track center line X Ca of the reference track groove portion 7C1a of the second track groove 7C1 of the outer joint member 2 is offset toward the back side of the outer joint member 2 with respect to the joint center O the amount f5 3) is, and is formed in the offset (f6 3) is arcuate with a curvature center O5 3 in the radial direction.
  • the track center line Y Ca of the reference track groove 9C1a of the second track groove 9C1 of the inner joint member 3 is offset (offset amount f5 3 ) toward the opening side of the outer joint member 2 with respect to the joint center O It is formed in an arc shape having a center of curvature O7 3 that is offset (offset amount f6 3) in the direction.
  • the track centerlines X Ca and Y Ca of the reference track groove portions 7C1a and 9C1a are formed in a uniform arc shape over the entire axial direction of the track grooves 7C1 and 9C1.
  • a fixed type constant velocity universal joint according to a fifth embodiment of the present invention will be described based on FIGS. 8a and 8b.
  • the center of curvature of the track center line of the reference track groove portion of the track grooves 7 and 9 of the outer joint member 2 and the inner joint member 3 is different from the fourth embodiment. It differs in that it is located on the joint axis N-N and N'-N 'line and there is no radial offset. As shown in FIG.
  • raceway center line X Aa of the reference track groove portion 7A1a of the first track groove 7A1 of the outer joint member 2, with respect to 'the projection center O on the line'N'-N toward the inner side of the outer joint member 2 are formed in an arc shape having a center of curvature O1 4 that is offset (offset amount f1 4).
  • the track center line X Ca of the reference track groove portion 7C1a of the second track groove 7C1 of the outer joint member 2 is on the joint line O with respect to the joint center O on the joint axis NN. It is formed in an arc shape having a center of curvature O5 4 offset (offset amount f5 4 ) toward the back side.
  • the track center line Y Ca of the reference track groove portion 9C1a of the second track groove 9C1 of the inner joint member 3 is offset toward the opening side of the outer joint member 2 with respect to the joint center O on the joint axis NN It is formed in an arc shape having a center of curvature O.sub.7 4 with the offset amount f.sub.5 4 ).
  • a fixed type constant velocity universal joint according to a sixth embodiment of the present invention will be described based on FIGS. 9a and 9b.
  • the center of curvature of the track center line of the reference track groove portion of the track grooves 7 and 9 of the outer joint member 2 and the inner joint member 3 is different from the fourth embodiment. They differ in that they are offset radially downward to the joint axis NN and N'-N 'lines.
  • Raceway center line Y Aa of the reference track groove portion 9A1a of the first track groove 9A1 of the inner joint member 3 is offset toward the opening side of the outer joint member 2 relative to the projection center O '(the offset amount f1 5), It is formed in an arc shape having a curvature center O 3 5 offset (offset amount f 2 5 ) radially downward with respect to the N′-N ′ line.
  • the track center line X Ca of the reference track groove portion 7C1a of the second track groove 7C1 of the outer joint member 2 is offset toward the back side of the outer joint member 2 with respect to the joint center O the amount f5 5) is, and is formed in an arc shape having a center of curvature O5 5 that is offset (offset amount f6 5) radially lower side with respect to the axis N-N of the joint.
  • the track center line Y Ca of the reference track groove 9C1a of the second track groove 9C1 of the inner joint member 3 is offset (offset amount f5 5 ) toward the opening side of the outer joint member 2 with respect to the joint center O It is formed in an arc shape having a center of curvature O7 5 that is offset (offset amount f6 5) radially lower side with respect to the axis N-N.
  • the track grooves 7, 9 include three pairs of first track grooves 7A, 9A, 7B, 9B and three second track Since the grooves 7C and 9C are formed, three balls 4 (or 4 ') of the first track grooves 7A, 9A, 7B and 9B and three of the second track grooves 7C and 9C are always used. Torque is transmitted by a total of six balls 4 ′ ′ of the ball, and torque is shared more evenly by arranging nine balls 4, 4 ′, 4 ′ ′ on the same circumference on the plane P The load capacity and durability can be ensured even in the normal angle range.
  • the second track groove 7C, 9C raceway center line Xc of, Y C is the first track groove 7A, 7B, 9A, raceway center line X A of 9B, X B, Y A, a pair of Y B
  • the track load in the high operating angle range is suppressed, and the ball at the open end of the track groove 7 of the outer joint member 2 at an ultra-high operating angle exceeding 50 ° 4 is smooth, and is suitable as a fixed type constant velocity universal joint for an ultra-high operating angle.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bearings For Parts Moving Linearly (AREA)
  • Rolling Contact Bearings (AREA)

Abstract

L'invention concerne un joint homocinétique de type fixe comprenant un élément de joint interne et un élément de joint externe formés à partir d'une pluralité de rainures de guidage, des billes de transmission de couple incorporées entre des rainures de guidage opposées, et une cage qui retient les billes de transmission de couple. Le joint homocinétique de type fixe présente : des rainures de guidage (7) d'élément de joint externe qui sont conçues à partir de trois paires de premières rainures de guidage (7A, 7B) positionnées à équidistance dans la direction circonférentielle et de trois secondes rainures de guidage (7C) ; des lignes centrales de trajectoire (XA, XB) des premières rainures de guidage (7A, 7B) et des lignes centrales de trajectoire (XC) des secondes rainures de guidage (7C) sont conçues pour satisfaire des conditions prédéfinies ; utilisant un plan (P) comme référence, des lignes centrales de trajectoire (Y) de rainures de guidage (9) d'élément de joint interne sont formées en symétrie spéculaire avec des lignes centrales de trajectoire (X) des paires de rainures de guidage (7) de l'élément de joint externe.
PCT/JP2018/022121 2017-07-03 2018-06-08 Joint homocinétique de type fixe WO2019009014A1 (fr)

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JP2017130228A JP6890485B2 (ja) 2017-07-03 2017-07-03 固定式等速自在継手
JP2017-130228 2017-07-03

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WO2019009014A1 true WO2019009014A1 (fr) 2019-01-10

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111609046A (zh) * 2020-05-21 2020-09-01 杭州通绿机械有限公司 一种在大角度常用工况下传动机构用万向节及其结构设计方法

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Publication number Priority date Publication date Assignee Title
JPH11303882A (ja) * 1998-04-15 1999-11-02 Nippon Seiko Kk 等速ジョイント
JP2004332815A (ja) * 2003-05-07 2004-11-25 Ntn Corp 固定型等速自在継手
JP2008519207A (ja) * 2004-11-02 2008-06-05 ゲー カー エヌ ドライブライン インターナショナル ゲゼルシャフト ミット ベシュレンクテル ハフツング トラック転換点を有するカウンタートラックジョイント
JP2012017809A (ja) * 2010-07-08 2012-01-26 Ntn Corp 固定式等速自在継手

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Publication number Priority date Publication date Assignee Title
WO2005028894A1 (fr) * 2003-08-22 2005-03-31 Gkn Driveline Deutschland Gmbh Joint homocinetique presentant un faible deplacement radial des billes

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11303882A (ja) * 1998-04-15 1999-11-02 Nippon Seiko Kk 等速ジョイント
JP2004332815A (ja) * 2003-05-07 2004-11-25 Ntn Corp 固定型等速自在継手
JP2008519207A (ja) * 2004-11-02 2008-06-05 ゲー カー エヌ ドライブライン インターナショナル ゲゼルシャフト ミット ベシュレンクテル ハフツング トラック転換点を有するカウンタートラックジョイント
JP2012017809A (ja) * 2010-07-08 2012-01-26 Ntn Corp 固定式等速自在継手

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111609046A (zh) * 2020-05-21 2020-09-01 杭州通绿机械有限公司 一种在大角度常用工况下传动机构用万向节及其结构设计方法

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