WO2003104669A1 - 等速ジョイント - Google Patents
等速ジョイント Download PDFInfo
- Publication number
- WO2003104669A1 WO2003104669A1 PCT/JP2003/007105 JP0307105W WO03104669A1 WO 2003104669 A1 WO2003104669 A1 WO 2003104669A1 JP 0307105 W JP0307105 W JP 0307105W WO 03104669 A1 WO03104669 A1 WO 03104669A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- guide groove
- ball
- curvature
- contact
- radius
- Prior art date
Links
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
- F16D3/224—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
- 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
- F16D2003/22309—Details of grooves
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S464/00—Rotary shafts, gudgeons, housings, and flexible couplings for rotary shafts
- Y10S464/904—Homokinetic coupling
- Y10S464/906—Torque transmitted via radially spaced balls
Definitions
- the present invention relates to a constant velocity joint.
- a ball joint type constant velocity joint in which the angle (joint angle) of two intersecting axes is variable and rotation transmission between the two axes is uniform.
- This constant velocity joint includes an inner joint member, an outer joint member, a cage having a ball holding window, and a ball.
- the inner joint member has an outer peripheral surface having a spherical surface and has a plurality of first guide grooves in the axial direction.
- the outer joint member has a cup shape and an inner peripheral surface having a spherical surface and has an axial direction. And the same number of second guide grooves as the first guide grooves.
- the cage is fitted between the inner and outer joint members. The ball is held by the ball holding window of the cage, and engages with the first and second guide grooves to transmit the torque of the inner joint member to the outer joint member. Is configured.
- the first and second guide grooves are formed so as to gradually become shallower in the axial direction from the opening side to the bottom side of the outer joint member. Further, the ball is configured to contact the first and second guide grooves with a constant contact angle from the opening side to the bottom side. Further, the first and second guide grooves are formed by two curved surfaces intersecting at the center of the groove bottom in cross section, and each curved surface is formed with a constant radius of curvature from the opening side to the bottom side. ing.
- the term “contact angle” as used herein refers to the angle formed between the center of contact between the ball and the guide groove and the center of the groove bottom of the guide groove with reference to the center of the ball.
- the contact center means the point where the major axis and the minor axis intersect on the elliptical contact surface (contact ellipse) formed by the contact between the guide groove and the ball.
- the long axis refers to the axis that is the longest part in the longitudinal direction of the contact ellipse, and the short axis refers to the axis that is the longest part in the short direction orthogonal to the long axis.
- the first and second guide grooves are formed so as to be gradually shallower from the opening side to the bottom side (that is, the left side (opening in FIG. 1)). Part side) to the right side (bottom side)). Therefore, as shown in the lower part of FIG. 1 and FIG. 5 (a), when the ball 101 is located on the bottom side of the outer joint member 113, the inner joint member 1
- the first plan of 1 2 corresponds to the deep groove portion of the inner groove 102 and the ball 101. Therefore, an elliptical contact surface formed by the contact between the first guide groove 102 and the ball 101 (hereinafter referred to as a contact ellipse D) protrudes from the first guide groove 102. Not issued.
- the present invention has been made in view of the above-mentioned circumstances, and has as its object a constant-velocity joint in which a ball does not protrude from a guide groove and a contact area between the ball and the guide groove can be sufficiently ensured. In providing the services. Disclosure of the invention
- an inner joint member having an outer peripheral surface having a spherical surface and a plurality of first inner grooves in an axial direction, and a cup-shaped inner peripheral surface having a spherical surface.
- An outer joint member having the same number of second guide grooves as the first guide groove in the axial direction, a cage fitted between the inner and outer joint members, and being held by a ball holding window of the cage.
- a constant velocity joint having a ball engaging with the first and second guide grooves, at least one of the first and second guide grooves has a contact angle between the ball and the outer joint.
- the bottom side of the member is made smaller than the opening side, and the radius of curvature of the guide groove is made larger at the bottom side than at the opening side.
- the contact ellipse on the bottom side of the ellipse formed by the contact between the ball and the curved surface of the guide groove is: It is located closer to the center of the groove bottom than the contact ellipse on the opening side.
- the radius of curvature at the bottom side is larger than the radius of curvature at the opening side, the contact area between the ball and the curved surface of the guide groove becomes smaller. As a result, the contact ellipse at the bottom side becomes smaller at the opening side. It becomes smaller than the contact ellipse.
- the contact ellipse on the bottom side does not protrude from the edge portion, so that the joint angle is large. Even in the case where the ball does not move, the ball does not protrude from the first or second guide groove, and the contact area between the ball and the first or second guide groove can be sufficiently ensured. As a result, the surface pressure received by the first or second guide groove from the ball can be reduced, and as a result, stress concentration at the edge can be avoided, and the life of the constant velocity joint can be improved. Can be achieved.
- the contact ellipse was prevented from protruding from the edge portion.
- the degree of freedom of design of the inner joint member of the present invention can be increased as compared with the case where the first or second inner groove is formed by adjusting only the radius of curvature.
- the contact ellipse has a larger area (contact area) than the contact ellipse on the bottom side.
- the surface pressure that is, stress
- the contact ellipse on the bottom side where the angle becomes large has no stress at the edge even if the contact pressure increases due to the decrease of the area of the contact ellipse, and the edge may be damaged. Therefore, compared to the inner joint member of the conventional technology, the inner joint member of the present invention can maintain durability even when the wall thickness is reduced, and is downsized by the reduced thickness. it can.
- the contact angle is provided so that the contact angle gradually decreases from the opening side to the bottom side of the outer joint member.
- the radius of curvature is provided so as to gradually increase from the opening side to the bottom side.
- the third invention provides an inner joint member having an outer peripheral surface having a spherical surface and a plurality of first grooves in an axial direction, and a cup-shaped inner peripheral surface having a spherical surface.
- Both outer joint members having the same number of second guide grooves as the first guide grooves in the axial direction, a cage fitted between the inner and outer joint members, and a ball holding window of the same cage.
- at least one of the first and second guide grooves has at least one guide groove. The radius of curvature at the bottom of the outer joint It is smaller than the radius of curvature of the guide groove on the edge side.
- the contact between the ball and the curved surface of the first guide groove or the second guide groove forms an asymmetrical elliptical contact between the edge portion side and the groove bottom center side around the short axis.
- An ellipse is formed. That is, in the contact ellipse, the length from the minor axis to the edge portion is shorter in the major axis direction and the contact area is smaller than that from the minor axis to the groove bottom center portion. Therefore, the ball is prevented from protruding from the edge portion in the shallow portion of the groove on the bottom side of the first guide groove or the second guide groove. That is, the edge and the contact ellipse are set to have a predetermined distance.
- the contact area of the portion of the contact ellipse located on the groove bottom center side with respect to the minor axis is provided.
- the contact area between the ball and the first guide groove or the second guide groove can be secured. Therefore, by ensuring a contact area on the bottom side of the first guide groove or the second guide groove, the contact pressure can be reduced. Therefore, even if the joint angle is large, the contact pressure can be reduced, and the length of the major axis of the contact ellipse on the bottom side can be shorter than the contact ellipse on the opening side, and the edge part can be reduced. Damage can be suppressed.
- the inner joint member of the present invention can increase the degree of freedom in design as compared with the case where the first guide groove or the second inner groove is formed by adjusting the distance.
- the constant velocity joint according to claim 3 in the constant velocity joint according to claim 3, at least one of the first and second guide grooves has a curvature on a groove bottom side over the entire length. The radius is smaller than the radius of curvature of the guide groove on the wedge side. According to this, the same operation and effect as the constant velocity joint according to claim 3 can be obtained.
- the contact angle between the guide groove and the ball in the constant velocity joint according to claim 3 or 4, is set such that the contact angle between the guide groove and the ball is closer to the bottom side than the opening side of the outer joint member. It is small. According to this, the same operation and effect as the constant velocity join described in claim 3 or 4 can be obtained.
- FIG. 1 is a front sectional view of a constant velocity joint according to the first embodiment and the prior art
- FIG. 2 (a) is a view of the inner joint member of FIG. 1 according to the first embodiment
- FIG. 2 is a cross-sectional view taken along line A—A
- FIG. 2 (b) is a cross-sectional view taken along line B—B of the inner joint member of FIG. 1 in the first embodiment
- a) is a cross-sectional view of the inner joint member of FIG. 1 in the second embodiment taken along line AA
- FIG. 3 (b) is an inner joint member of FIG. 1 in the second embodiment
- FIG. 3 is a sectional view taken along line B—B of FIG. 3, FIG.
- FIG. 3 (c) is an explanatory view showing a contact ellipse
- FIG. 4 is a sectional view of the inner joint member of FIG.
- FIG. 5 (a) is a partial cross-sectional view of the inner joint member according to the prior art on the opening side
- FIG. 5 (b) is a cross-sectional view of the inner joint member according to the prior art. Partial break on bottom side It is a diagram. BEST MODE FOR CARRYING OUT THE INVENTION
- FIG. 1 there is a force S that the left side is the opening side and the right side is the bottom side.
- the constant velocity joint 11 of the present embodiment is fitted between an inner joint member 12, an outer joint member 13, and both joint members 12, 13. It has a cage 14 fitted and a ball 15 held in the cage 14.
- the inner joint member 12 has a substantially cylindrical shape, and is fixed to one end of the drive shaft 16 by a spline connection.
- the outer peripheral surface 20 of the inner joint member 12 is formed into a convex spherical surface with a predetermined radius of curvature.
- six first guide grooves 21 for guiding the ball 15 along the direction of the axis P1 (axial direction) of the drive shaft 16 are formed at equal angular intervals.
- the first guide groove 21 is formed so as to become gradually shallower from the opening side to the bottom side in the assembled outer joint member 13, that is, the shaft base (the first shaft) with respect to the drive shaft 16. It is gradually shallower from the shaft end (right side in Fig. 1) to the shaft end (right side in Fig. 1).
- the outer joint member 13 has a cup shape with a bottom, and the bottom 13 a is formed integrally with one end of the driven shaft 22.
- a portion corresponding to the outer peripheral surface 20 of the inner joint member 12 is formed as a concave spherical surface with a predetermined radius of curvature.
- the second guide groove 24 is formed by two curved surfaces intersecting at the center of the groove bottom in a cross section in a direction orthogonal to the axis P2. These two curved surfaces are formed with a constant radius of curvature that is slightly larger than the radius of the ball 15 and are configured so that the ball 15 comes into contact with the second guide groove 24 at a constant contact angle. . Also, the second guide groove 24 is formed so as to be gradually shallower from the opening side to the bottom side similarly to the first guide groove 21. Each second guide groove 24 is formed at a position corresponding to each first guide groove 21.
- the cage 14 has a substantially cylindrical shape, and is fitted between the outer peripheral surface 20 of the inner joint member 12 and the inner peripheral surface 23 of the outer joint member 13. This The outer surface 30 of the die 14 has the same radius of curvature as the inner peripheral surface 23 of the outer joint member 13.
- the cage 14 has six ball holding windows 31 formed at equal angular intervals along the circumferential direction.
- the ball 15 is formed in a true spherical shape by steel. One ball 15 is arranged between each first guide groove 21 and the corresponding second guide groove 24, and each ball 15 of the cage 14 is held. It is located in window 31.
- FIG. 2 (a) shows the inner joint of the drive shaft 16 with respect to the opening side of the first guide groove 21 when the ball 15 is located below the axis P2 in FIG.
- FIG. 4 is a cross-sectional view of the left side of the member 12 taken along line AA.
- FIG. 2 (b) shows the bottom side of the first guide groove 21 when the ball 15 is located above the axis P2 in FIG. 1, that is, the inner joint member 12 with respect to the drive shaft 16.
- FIG. 4 is a cross-sectional view taken along line BB in FIG.
- FIG. 2 (a) is shown upside down for convenience of explanation.
- the first guide groove 21 of the inner joint member 12 intersects at the center 35 of the groove bottom (see FIGS. 2 (a) and 2 (b)). Left Right) It is formed by two curved surfaces 36.
- the curved surface 36 is formed such that its radius of curvature gradually increases from the opening to the bottom. That is, the radius of curvature r2 of the curved surface r6 of the curved surface 36 in FIG. 2 (a) and the radius of curvature r2 of the curved surface 36 in FIG. 2 (b) are larger. Is formed.
- the radius of curvature r 1 is formed to be slightly larger than the radius of the ball 15.
- the contact angle between the ball 15 and the first guide groove 21 is formed so as to gradually decrease from the opening to the bottom. That is, 2
- the contact angle ⁇ 2 in FIG. 2 (a) is smaller than the contact angle ⁇ 2 in FIG. 2 (b).
- the contact angles ⁇ 1 and ⁇ 2 are defined as the contact center where the ball 15 contacts the first guide groove 21 and the first guide groove 21 with respect to the center of the ball 15.
- the contact center is defined as the point where the major axis and the minor axis intersect on the elliptical contact surface (contact ellipse) formed by the contact between the first guide groove 21 and the ball 15.
- the long axis is the axis that is the longest part in the longitudinal direction of the contact ellipse
- the short axis is the axis that is the longest part in the short direction orthogonal to the long axis.
- the contact ellipses, 1, ⁇ 2 formed by the contact between the ball 15 and the curved surface 36 do not exceed the edge portions 37 on both side edges of the first guide groove 21, respectively.
- the contact angles ⁇ 1 and ⁇ 2 are set, and the radii of curvature rl and r 2 are set.
- the area of the contact ellipse (contact area) is set to gradually decrease from the opening side to the bottom side.
- the distance between the edge portion 37 and the contact ellipse may be uniform or non-uniform over the entire length of the first guide groove 21. In short, the distance between the edge portion 37 and the contact ellipse only needs to be a distance at which no excessive load is applied to the edge portion 37.
- the contact angle is formed so as to gradually decrease from the opening side to the bottom side, and the radius of curvature gradually increases from the opening side to the bottom side. Even when the joint angle becomes large, the ball 15 does not ride on the edge portion 37 even if the joint angle becomes large.
- the contact angle ⁇ 2 on the bottom side is smaller than the contact angle ⁇ 1 on the opening side, the contact between the ball 15 and the curved surface 36 can be reduced.
- the elliptical contact ellipse ⁇ 2 formed is located closer to the groove bottom center 35 than the contact ellipse M1 in FIG. 2 (a).
- the radius of curvature r 2 on the bottom side is larger than the radius of curvature r 1 on the opening side, the contact area between the ball 15 and the curved surface 36 becomes smaller.
- the contact ellipse M 2 becomes It is smaller than the contact ellipse M1.
- the contact ellipse M 2 does not protrude from the edge 37.
- the contact angle of the first guide groove 21 with the ball 15 is gradually reduced from the opening to the bottom, and the radius of curvature of the first guide groove 21 is reduced by the opening. It gradually increased from the side to the bottom side.
- the contact angle is gradually reduced from the opening side to the bottom side, and the radius of curvature is gradually increased.
- the following effects are obtained.
- the contact angle alone is gradually reduced from the opening side to the bottom side and the radius of curvature is constant, the contact ellipse formed by the ball 15 and the first guide groove 21.
- the contact angle must be set so that the edge does not protrude from the edge 37, and the angle becomes too small. Then, the contact portion between the ball 15 and the two curved surfaces 36 gets too close to the groove bottom center 35, and when the torque is transmitted from the drive shaft 16 to the driven shaft 22, rotation rattling occurs. I will.
- the contact between the ball 15 and the first guide groove 21 is made.
- the radius of curvature must be set so that the ellipse does not protrude from the edge portion 37, and the contact area of the contact ellipse becomes too small.
- the surface pressure received by the first guide groove 21 from the ball 15 increases, that is, the stress per unit area becomes too large, and the concave portion is formed on the surface of the first guide groove 21 by the pole 15. Will be formed. As a result, there is a possibility that the life of the constant velocity joint 11 may be shortened.
- the contact angle is gradually reduced from the opening side to the bottom side, and the radius of curvature is gradually increased. It can be eliminated.
- the ball 15 does not protrude from the first guide groove 21 and the contact area between the ball 15 and the first guide groove 21 can be sufficiently ensured.
- Surface pressure received from 5 can be suppressed.
- stress concentration at the edge portion 37 can be avoided, and the life of the constant velocity joint 11 can be improved.
- the contact ellipse is prevented from protruding from the edge portion 37 by forming the first guide groove 21 by appropriately adjusting both the contact angle and the radius of curvature. . Therefore, adjusting only the contact angle or only the radius of curvature As compared with the case where the first guide groove 21 is formed, the inner joint member 12 of the present embodiment can increase the design flexibility.
- the surface pressure at the contact ellipse is uniquely determined, and there is no design freedom.
- the ball 15 will be adjusted so as not to protrude from the inner groove 21 only by the size of the contact ellipse. There is no freedom.
- the contact ellipse in the normal area of the first guide groove 21 (joint angle is about 0 to about 10 °), the contact ellipse is larger in area than the contact ellipse M 2 on the bottom side. Since the (contact area) is large, the surface pressure (ie, stress) can be reduced, and the same durability can be maintained in the normal use area.
- the service area means that the ball 15 rolls in the first guide groove 21 when the joint angle between the drive shaft 16 and the driven shaft 22 is about 0 to about 10 °. Refers to the area. Note that the range of the joint angle in the normal range differs depending on the vehicle type in which the constant velocity joint 11 is used. , But is not limited to this.
- the contact ellipse M2 on the bottom side which is used less frequently than the normal use area and has a larger joint angle, has an edge portion even when the contact ellipse area becomes smaller and the surface pressure increases. No stress of 37 occurs, and there is no risk of damage to the edge 37.
- the inner joint member 112 of the present embodiment can ensure durability even if the thickness is reduced, and has a reduced thickness. It can be downsized by the amount of time.
- the constant velocity joint 51 of the second embodiment is obtained by changing the first guide groove 21 in the constant velocity joint 11 of the first embodiment, and is similar to that of the first embodiment.
- the same components are denoted by the same reference numerals, detailed description thereof will be omitted, and only different portions will be described.
- FIG. 3 (a) shows the opening side of the first guide groove 21 when the ball 15 is located below the axis P2 in Fig. 1, that is, the inner joint portion with respect to the drive shaft 16;
- FIG. 3 is a cross-sectional view of the left side of the material 12 taken along the line AA.
- Fig. 3 (b) shows the bottom side of the first guide groove 21 when the ball 15 is positioned above the axis P2 in Fig. 1, that is, the inner joint member 1 with respect to the drive shaft 16;
- FIG. 2 is a sectional view taken along the line B—B on the right side of FIG. FIG. 3 (a) is shown upside down for convenience of explanation.
- the ball 15 is configured to be in contact with the first guide groove 21 at a constant contact angle 1.
- the left and right intersect at the groove bottom center 35. Are formed.
- each curved surface 52 has two different curved radii r3, r4 at curved surface portions 52a, 52b. Each is formed.
- the curved surface 52 a that forms the radius of curvature r 3 is located on the groove bottom center 35 side (groove bottom side)
- the curved surface 52 b that forms the radius of curvature r 4 is the edge 3 It is located on the 7th side (edge side).
- the radius of curvature r3 is the same as the radius of curvature r1 in the first embodiment
- the radius of curvature r4 is a radius of curvature larger than the radius of curvature r3.
- the curved surface portions 52a and 52b are formed so as to be adjacent to each other with a boundary line b in FIG. 3 (b) as a boundary.
- the contact ellipse M3 having an asymmetrical elliptical shape formed by the contact between the ball 15 and the curved surface 52 does not exceed the edge portions 37 on both side edges of the first guide groove 21.
- the contact angle ⁇ 1 and the radii of curvature r 3 and r 4 are set.
- the minor axis S of the contact ellipse M3 (see Fig. 3 (c)) is set to coincide with the boundary line b.
- the curved surface 52 located closer to the edge 37 than the short axis S is It has a larger radius of curvature than the curved surface 52 (curved portion 52a) located on the groove bottom center 35 side of the minor axis S.
- the contact between the ball 15 and the curved surface 36 forms a contact ellipse M 3 having an asymmetrical elliptical shape between the edge 37 and the groove bottom center 35 around the short axis S. Is done. That is, in the contact ellipse M 3, the length in the long axis direction from the short axis S to the edge portion 37 on the edge portion 37 side is shorter than the portion on the groove bottom center 35 side from the short axis S and the contact area is smaller.
- the shape of the contact ellipse M3 on the edge portion 37 side with respect to the short axis S is The shape is the same as the shape of the groove bottom center 35 side than the short axis S, and as a result, the contact ellipse M 3 protrudes from the edge portion 37.
- the radius of curvature of the curved portion 52 b is made larger than the radius of curvature of the curved portion 52 a.
- the radius of curvature of the first guide groove 21 is reduced.
- the pole 15 is prevented from protruding from the edge part 37. That is, the edge portion 37 and the contact ellipse are set to have a predetermined separation distance.
- the two curved surfaces 52 constituting the first guide groove 21 are formed into curved surface portions 52 a having two different radii of curvature r 3 and r 4. , 52b.
- the curved surface portion 52b having a larger radius of curvature than the curved surface portion 52a is formed so as to be located on the edge portion 37 side of the short axis S, and the curved surface portion 52a is formed by the short axis S It was formed so as to be located on the center 35 side of the groove bottom with the boundary as the boundary.
- the length in the major axis direction of the contact ellipse M 3 located on the edge 37 side of the short axis S is larger than that of the contact ellipse M 3 located on the groove bottom center 35 side of the short axis S.
- the length is shorter than the length in the long axis direction, and the contact ellipse M3 does not protrude from the edge portion 37.
- the contact area between the ball 15 and the first guide groove 21 is increased. Can be secured.
- the contact pressure can be reduced. Therefore, even if the joint angle becomes large, the contact pressure can be reduced, and the major axis of the contact ellipse M 3 on the bottom side is shorter than the contact ellipse M 1 on the opening side. And damage to the edge portion 37 can be suppressed.
- both curved surfaces 52 are formed with two different radii of curvature r 3 and r 4.
- the curvature radii of the radii of curvature r 3 and r 4 as appropriate, the contact ellipse is shifted to the edge portion We did not protrude from 37. Therefore, the degree of freedom of design of the inner joint member 12 of the present embodiment can be increased as compared with the case where the first guide groove 21 is formed by adjusting only the contact angle or only the radius of curvature.
- the inner joint member 12 is formed so that the minor axis S of the contact ellipse M 3 and the boundary line b coincide with each other, but the minor axis S and the boundary line b are
- the inner joint member 12 may be formed in a state where the inner joint member 12 does not match.
- the contact angle of the first guide groove 21 with the ball 15 is gradually reduced from the opening to the bottom, and the radius of curvature of the first guide groove 21 is changed to the opening. From the bottom toward the bottom.
- the contact angle of the first guide groove 21 is not limited to a constant angle from the opening to the center, and is gradually reduced from the center to the bottom to reduce the radius of curvature.
- the distance from the opening to the center may be constant, and may be gradually increased from the center to the bottom.
- the bottom side of the first guide groove 21 has two curved surfaces 52a and 52b having two different radii of curvature r3 and r4, respectively.
- the present invention is not limited to this, and the curved surface 52 may be formed by the curved surface portions 52 & and 52b of two different radii of curvature r3 and 4 over the entire length of the first guide groove 21. .
- the ball 15 is configured to contact the first guide groove 21 at a constant contact angle ⁇ 1.
- the present invention is not limited thereto, and the contact angle at which the ball 15 contacts the first guide groove 21 may be formed so as to gradually decrease from the opening side toward the bottom side. That is, the contact angle in Fig. 3 (a)
- the inner joint member 12 is formed so that ⁇ 1 and the contact angle ⁇ 3 in FIG. 4 become smaller.
- the contact angle of the first guide groove 21 with the ball 15 is gradually reduced from the opening side to the bottom side, and the radius of curvature of the first guide groove 21 is changed to the opening side. From the bottom toward the bottom.
- the present invention is not limited to this, and the above processing may be performed only on the second guide groove 24 or on both the guide grooves 21 and 24. Even in this case, it is possible to obtain the same effects as those of the first embodiment or the same or higher effects.
- both curved surfaces 52 of the first guide groove 21 are formed by curved surface portions 52a and 52b having two different radii of curvature r3 and r4, respectively.
- the present invention is not limited to this, and the above-described processing may be performed only on the second guide groove 24 or on the inner grooves 21 and 24 in both cases. Even in this case, it is possible to obtain the same effect as the second embodiment or the same or higher effect.
- the constant velocity joint according to the present invention is useful because the ball does not protrude from the guide groove and the contact area between the ball and the guide groove can be sufficiently ensured.
- it is suitable for use in ball joint type constant velocity joints in which the angle (joint angle) of two axes that intersect is variable and the rotational transmission between the two axes has uniform velocity. I have.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Pivots And Pivotal Connections (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/513,789 US7128654B2 (en) | 2002-06-06 | 2003-06-05 | Constant velocity joint |
EP03757196A EP1510711A4 (en) | 2002-06-06 | 2003-06-05 | HOMOKINETIC JOINT |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2002-165916 | 2002-06-06 | ||
JP2002165916A JP2004011760A (ja) | 2002-06-06 | 2002-06-06 | 等速ジョイント |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2003104669A1 true WO2003104669A1 (ja) | 2003-12-18 |
Family
ID=29727614
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2003/007105 WO2003104669A1 (ja) | 2002-06-06 | 2003-06-05 | 等速ジョイント |
Country Status (4)
Country | Link |
---|---|
US (1) | US7128654B2 (ja) |
EP (1) | EP1510711A4 (ja) |
JP (1) | JP2004011760A (ja) |
WO (1) | WO2003104669A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009522508A (ja) * | 2005-12-29 | 2009-06-11 | ジーケイエヌ ドライヴライン 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 | 大きな屈曲角の固定式等速自在継手 |
CN103453032A (zh) * | 2012-06-04 | 2013-12-18 | 现代自动车株式会社 | 用于车辆的等速万向节装置 |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006300205A (ja) * | 2005-04-20 | 2006-11-02 | Toyota Motor Corp | 等速継手およびそのアウターレース |
US7686696B2 (en) * | 2006-02-24 | 2010-03-30 | Jtekt Corporation | Constant velocity joint |
US8684850B2 (en) * | 2010-04-02 | 2014-04-01 | Ntn Corporation | Constant velocity universal joint |
JP5784423B2 (ja) * | 2011-09-05 | 2015-09-24 | Ntn株式会社 | 固定式等速自在継手 |
US8852005B2 (en) * | 2011-11-09 | 2014-10-07 | Hyundai Wia Corporation | Angled offset ball type constant velocity joint for vehicle |
JP2016148433A (ja) * | 2015-02-13 | 2016-08-18 | 本田技研工業株式会社 | 固定型等速ジョイント |
KR20160111127A (ko) * | 2015-03-16 | 2016-09-26 | 이래오토모티브시스템 주식회사 | 자동차용 등속 조인트 |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58214019A (ja) * | 1982-06-07 | 1983-12-13 | Toyota Motor Corp | 等速ボ−ルジヨイント |
JPS60167816U (ja) * | 1984-04-17 | 1985-11-07 | エヌ・テ−・エヌ東洋ベアリング株式会社 | 等速自在継手 |
JPS60167817U (ja) * | 1984-04-17 | 1985-11-07 | エヌ・テ−・エヌ東洋ベアリング株式会社 | 等速自在継手 |
JPH0384423U (ja) * | 1989-12-18 | 1991-08-27 | ||
US5221233A (en) * | 1990-10-08 | 1993-06-22 | Gkn Automotive Ag | Constant velocity fixed joint with alternate sequential running grooves |
WO2001016500A1 (de) * | 1999-08-30 | 2001-03-08 | Gkn Automotive Gmbh | Kugelgleichlaufdrehgelenk |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS55126124A (en) * | 1979-03-23 | 1980-09-29 | Toyota Motor Corp | Uniform speed ball joint and grinding method of ball groove |
JPS60167816A (ja) | 1984-02-07 | 1985-08-31 | Ricoh Co Ltd | Pc基板搬送装置 |
JPS60167817A (ja) | 1984-02-08 | 1985-08-31 | Morinaga & Co Ltd | 表裏反転供給装置 |
DE3904655C1 (ja) | 1989-02-16 | 1990-02-08 | Uni-Cardan Ag, 5200 Siegburg, De | |
JP2592333B2 (ja) | 1989-08-29 | 1997-03-19 | 株式会社日立製作所 | 空気流量センサ素子及びその製造方法 |
DE4443093C1 (de) * | 1994-12-03 | 1996-01-04 | Gkn Automotive Ag | Kugelgleichlaufdrehgelenk |
-
2002
- 2002-06-06 JP JP2002165916A patent/JP2004011760A/ja active Pending
-
2003
- 2003-06-05 EP EP03757196A patent/EP1510711A4/en not_active Withdrawn
- 2003-06-05 US US10/513,789 patent/US7128654B2/en not_active Expired - Fee Related
- 2003-06-05 WO PCT/JP2003/007105 patent/WO2003104669A1/ja active Application Filing
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58214019A (ja) * | 1982-06-07 | 1983-12-13 | Toyota Motor Corp | 等速ボ−ルジヨイント |
JPS60167816U (ja) * | 1984-04-17 | 1985-11-07 | エヌ・テ−・エヌ東洋ベアリング株式会社 | 等速自在継手 |
JPS60167817U (ja) * | 1984-04-17 | 1985-11-07 | エヌ・テ−・エヌ東洋ベアリング株式会社 | 等速自在継手 |
JPH0384423U (ja) * | 1989-12-18 | 1991-08-27 | ||
US5221233A (en) * | 1990-10-08 | 1993-06-22 | Gkn Automotive Ag | Constant velocity fixed joint with alternate sequential running grooves |
WO2001016500A1 (de) * | 1999-08-30 | 2001-03-08 | Gkn Automotive Gmbh | Kugelgleichlaufdrehgelenk |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009522508A (ja) * | 2005-12-29 | 2009-06-11 | ジーケイエヌ ドライヴライン 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 | 大きな屈曲角の固定式等速自在継手 |
JP4885236B2 (ja) * | 2005-12-29 | 2012-02-29 | ジーケイエヌ ドライヴライン 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 | 大きな屈曲角の固定式等速自在継手 |
CN103453032A (zh) * | 2012-06-04 | 2013-12-18 | 现代自动车株式会社 | 用于车辆的等速万向节装置 |
Also Published As
Publication number | Publication date |
---|---|
EP1510711A4 (en) | 2006-03-15 |
EP1510711A1 (en) | 2005-03-02 |
JP2004011760A (ja) | 2004-01-15 |
US7128654B2 (en) | 2006-10-31 |
US20050202881A1 (en) | 2005-09-15 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP5073190B2 (ja) | 摺動式等速自在継手 | |
JP2002181065A (ja) | 対向軌道ジョイントとしての等速固定ボールジョイント | |
JP2009507195A (ja) | 制限された軸方向移動を有するカウンタトラックジョイント | |
WO2003104669A1 (ja) | 等速ジョイント | |
EP1458986A1 (en) | Constant velocity joint | |
WO2008080709A1 (en) | Joint arrangement with cage offset | |
JP2007218353A (ja) | 固定式等速自在継手 | |
JP3523190B2 (ja) | 等速ジョイント | |
JPH04228925A (ja) | 等速自在継手 | |
US11248660B2 (en) | Constant velocity joint | |
JP2003021158A (ja) | 固定型等速自在継手 | |
JP2004332817A (ja) | 固定型等速自在継手 | |
JPH0736184Y2 (ja) | 等速自在継手 | |
JP2000230568A (ja) | ボール型等速ジョイント | |
JP3012663B2 (ja) | 等速ジョイント | |
JPH083712Y2 (ja) | 等速ジョイント | |
JP2019183883A (ja) | 等速ジョイント | |
JP2007016899A (ja) | 固定型等速自在継手 | |
JP4593408B2 (ja) | 固定型等速自在継手 | |
JP2007024106A (ja) | 固定型等速自在継手 | |
US20230184297A1 (en) | Constant-speed universal joint | |
JP2590508B2 (ja) | 自在継手 | |
JP2008215518A (ja) | 摺動式等速自在継手 | |
JPH0329621Y2 (ja) | ||
JP2574211Y2 (ja) | ツェッパ型等速ジョイント |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): US |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LU MC NL PT RO SE SI SK TR |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
WWE | Wipo information: entry into national phase |
Ref document number: 2003757196 Country of ref document: EP Ref document number: 10513789 Country of ref document: US |
|
WWP | Wipo information: published in national office |
Ref document number: 2003757196 Country of ref document: EP |