阅读说明：本技术 等速旋转接头 (Constant velocity rotary joint ) 是由 D·克林斯 J·A·阿里斯通多·阿里萨瓦拉加 于 2020-02-27 设计创作，主要内容包括：本发明涉及一种用于扭矩传递的等速接头(10),其中,由滚珠道轨(20a、40a)构成的第一类道轨对被设计为使得滚珠道轨的中心线(MN)的曲率中心在接头(10)伸直的情况下位于接头中心平面(EM)中。由滚珠道轨(20b、40b)构成的第二类道轨对被设计为使得滚珠道轨的中心线(MS)具有至少两个部段(MSi、MSa)。第二类道轨对的外滚珠道轨(20b)的每一中心线(MS)均具有至少一个内部部段(MSi)和一个外部部段(MSa),其中,内部部段(MSi)位于接头外部部件(11)的连接侧(61)上,而外部部段(MSa)位于接头外部部件(11)的开口侧(60)上,并且内部部段(MSi)是弯曲的。在接头(10)伸直的情况下,内部部段(MSi)的曲率中心(OT)位于接头外部部件(11)的中空体积内,在朝向开口侧(60)的方向上与接头中心平面(EM)错开,而中心线(MS)通过外部部段(MSa)在朝向开口侧(60)的方向上扩展。(The invention relates to a constant velocity joint (10) for torque transmission, wherein a first track pair of ball tracks (20a, 40a) is designed such that the center of curvature of the center line (MN) of the ball tracks lies in the joint center plane (EM) with the joint (10) straight. The second track pair of ball tracks (20b, 40b) is designed in such a way that the center line (MS) of the ball tracks has at least two sections (MSi, MSa). Each center line (MS) of the outer ball tracks (20b) of the track pairs of the second type has at least one inner section (MSi) and one outer section (MSa), wherein the inner section (MSi) is located on the connecting side (61) of the joint outer part (11) and the outer section (MSa) is located on the opening side (60) of the joint outer part (11) and the inner section (MSi) is curved. The center of curvature (OT) of the inner section (MSi) lies within the hollow volume of the joint outer part (11) with the joint (10) straight out, offset from the joint center plane (EM) in the direction towards the opening side (60), while the center line (MS) is widened by the outer section (MSa) in the direction towards the opening side (60).)

1. A constant velocity rotary joint (10) for torque transmission comprising:

a joint outer (11) having a plurality of outer ball tracks (20 a; 20b),

a joint inner part (12) having a plurality of inner ball tracks (40 a; 40b),

torque-transmitting balls (30; 31), the torque-transmitting balls (30; 31) being guided in track pairs consisting of an outer ball track (20 a; 20b) and an inner ball track (40 a; 40b), respectively, and

a cage (50), wherein the cage (50) accommodates the balls (30; 31) in circumferentially distributed cage windows and holds the balls (30; 31) in a common joint center plane (EM) with the constant velocity rotary joint (10) straight,

wherein the joint outer part (11) has a longitudinal axis (La) and a connecting portion (61) with open sides (60) axially opposite each other, and the paths of the centre points of the balls (30; 31) are respectively defined as centre lines (MS; MN) of the respective ball tracks,

and the first type of track pair of ball tracks (20 a; 40a) is configured such that the center of curvature of the center line (MN) of the ball tracks lies in the joint center plane (EM) with the joint (10) straight, while the second type of track pair of ball tracks (20 b; 40b) is configured such that the center line (MS) of the ball tracks has at least two sections (MSi; MSa) and the center line (MS) of each of the outer ball tracks (20b) of the second type of track pair has at least one inner section (MSi) and one outer section (MSa), wherein the inner section (MSi) is located on a connection side (61) of the joint outer part (11) and the outer section (MSa) is located on an opening side (60) of the joint outer part (11) and the inner section (MSi) is curved, and in the case of a straight-out connection (10), the center of curvature (OT') of the inner section (MSi) lies within the hollow volume of the connection outer part (11), offset from the connection center plane (EM) in the direction of the opening side (60), while the center line (MS) expands through the outer section (MSa) in the direction of the opening side (60).

2. Constant velocity rotary joint according to claim 1, characterized in that the centre line (MS) extends linearly through the outer section (MSa).

3. Constant velocity rotary joint according to claim 1, characterised in that the at least two sections (MSi; MSa) are curved in opposite directions and that the centre of curvature (X) of the outer section (MSa) is located outside the hollow volume of the joint outer part (11).

4. Constant velocity rotary joint according to claim 3, characterised in that the radius of curvature (R1) of the inner section (MSi) and the diameter D of the associated ball (31)_KugelIs between 1.5 and 2.5.

5. Constant velocity rotary joint according to claim 3 or 4, characterised in that the radius of curvature (R2) of the outer section (MSa) and the diameter D of the associated ball (31)_KugelIs between 1.0 and 10.

6. Constant velocity rotary joint according to any one of claims 3 to 5, characterised in that the centre of curvature (Xa) of the outer section (MSa) is staggered in relation to the joint centre plane (EM) in a direction towards the open side (60).

7. Homokinetic rotary joint according to any of claims 1 to 6, characterized in that the radius of curvature (R3) of the centre line (MN) of the track pair of the first type and the diameter D of the associated ball (30) are such that_KugelIs between 1.5 and 2.5.

8. Constant velocity rotary joint according to any one of claims 1 to 7, characterized in that the section (MSi; MSa) of the centre line (MS) of the ball tracks (20 b; 40b) of the track pair of the second type has an additional section following the section (MSi; MSa).

9. Constant velocity rotary joint according to claim 8, characterised in that the additional section is shaped linearly or curvedly.

10. Constant velocity rotary joint according to any one of claims 1 to 9, characterized in that the same number of two types of track pairs is provided and the two types of track pairs are arranged alternately.

11. A constant velocity rotary joint as claimed in any one of claims 1 to 10, wherein the number of balls is at least eight.

12. Homokinetic rotary joint according to any of claims 1 to 11, characterized in that the first type of track pair of ball tracks (20 a; 40a) is configured such that the respective centre line (MN) of the outer ball tracks (20a) of the first type of track pair has at least one inner section and one outer section, wherein the inner section is located on the connection side (61) of the joint outer part (11) and the outer section is located on the open side (60) of the joint outer part (11) and the centre of curvature of the inner section is located in the joint centre plane (EM) and the centre of curvature of the outer section is located outside the joint outer part (11).

Technical Field

The present invention relates to a constant velocity rotary joint for torque transmission according to the preamble of claim 1.

Background

A constant velocity rotary joint is a mechanical coupling that connects two shafts to each other, in which the rotational speed of an output shaft is the same as that of an input shaft, regardless of the bending angle of the joint. In this case, the constant velocity rotary joint has a joint outer member having a plurality of outer ball tracks, a joint inner member having a plurality of inner ball tracks, and torque transmitting balls guided in respective pairs of tracks formed by the outer ball tracks and the inner ball tracks. Furthermore, a cage is provided which accommodates the balls in cage windows and holds the balls in a common joint center plane in the event of straightening of the constant velocity rotary joint. The cage holds the balls in the plane of constant velocity motion (bisector of angle) when the joint is bent. In this case, the spherical outer surface of the cage bears with play against the spherical inner surface of the joint outer part, and the spherical inner surface of the cage bears with play against the spherical outer surface of the joint inner part, in order to enable free pivoting of the cage between the two joint parts.

Against this background, it is an object of the present invention to provide a constant velocity rotary joint in which the ratio of torque transmission to construction volume is as large as possible and is improved in particular with respect to running smoothness and efficiency. In particular, at large joint angles (over 50 °, for example 54 °), it should be possible to transmit as high a torque as possible.

Disclosure of Invention

According to the invention, this object is achieved by a constant velocity rotary joint according to independent claim 1. Advantageous embodiments of the joint result from the dependent claims 2 to 12.

The constant velocity rotary joint according to the present invention has a joint outer member having a generally pot shape with a first longitudinal axis and a first connection side and an opening side axially opposed to each other, and having an outer ball track on an inner circumferential surface thereof. For example, the connection side is designed as a journal or is designed to receive a journal. In addition, the constant velocity rotary joint has a joint inner member having a second longitudinal axis and an inner ball track on an outer circumferential surface thereof. Typically, the joint inner part is inserted into a hollow volume formed by the joint outer part. According to the invention, a plurality of balls are provided for torque transmission between the joint outer part and the joint inner part. Optionally, but preferably, they are balls having the same size. According to the invention, a ball cage is furthermore provided which is arranged between the joint inner part and the joint outer part and which has a plurality of cage windows distributed in the circumferential direction, in which cage windows the balls are guided. The cage is designed in particular in the form of a ring.

The joint inner part and the joint outer part are arranged in such a way that an outer ball track of the joint outer part and an inner ball track of the joint inner part are respectively opposite each other to form a track pair, wherein one of the balls is accommodated in each track pair. The possible paths of the center points of the balls in the ball tracks of the track pairs are respectively defined as the center lines of the respective ball tracks. In this case, the balls run along one or more outer contact lines in the outer ball track and along one or more inner contact lines in the inner ball track, respectively, in the case of a joint being bent. The ball contact line, also referred to below simply as contact line, may in this case extend along the respective rail bottom, but may also extend along both sides or one of the sides. For example, the cross-section of the ball track may be gothic or elliptical, or correspond to a pitch circle. The movements described by the balls in the ball tracks are described below by means of their respective center lines, which describe the rolling movement of the ball centers of the balls rolling on the respective ball tracks, and therefore the statements made for the respective center lines apply correspondingly to the contact lines, ignoring the play required for the balls.

Thus, a track pair exists with an outer centerline and an inner centerline that ultimately reflect the rolling characteristics of the balls as determined by the geometry of the ball track. The center lines of the outer and inner ball tracks of a track pair are matched to one another in such a way that, with the joint straight out, the outer and inner ball tracks are substantially mirror-symmetrical with respect to the joint center plane. This applies if practically necessary play between the movable joint partners is neglected. However, also intentional slight deviations from mirror symmetry are possible.

The constant velocity rotary joint according to the present invention has different types of track pairs constituted by ball tracks, in which the centre lines are shaped differently. According to the invention, the first track pair is formed by a ball track in such a way that the center of curvature of the center line of the ball track lies in the center plane of the rotary joint when the rotary joint is straightened. What is involved, therefore, is an at least partially concentrically extending ball track which has a large wrap angle over the entire bending angle range and therefore leads to a high torque transmission.

Furthermore, the track pairs of the second type, which are formed by ball tracks, are configured in such a way that their centre lines have at least two sections which are shaped differently. In this case, the respective center line of the outer ball tracks of the track pair of the second type has at least one inner section and one outer section, wherein the inner section is located on the connection side of the joint outer part and the outer section is located on the opening side of the joint outer part. The inner section is curved and, with the joint straightened out, has a center of curvature within the hollow volume of the joint outer part, offset from the joint center plane in a direction towards the open side, while the center line is expanded by the outer section in a direction towards the open side.

In order to expand the centre line in the direction towards the open side, the outer section can be designed in various ways. In one embodiment of the invention, the center line is extended linearly, for example, by the outer section. In a further embodiment of the invention, it is provided that at least two sections of the center line are curved in opposite directions. In particular, the center of curvature of the outer section is located outside the hollow volume of the joint outer part. Preferably, in this case, the center of curvature of the outer section is also offset from the joint center plane, and in particular in the direction towards the open side. Thus, in the case of the second type track pair, an S-shaped course of the ball track is formed.

The opening angle α of the second type of track pair opens in a direction towards the open side of the joint outer part. In this case, the opening angle is defined as the angle between the tangents on the balls at the contact points of the balls with the ball tracks. The ball tracks of the track pairs of the second type are therefore designed in such a way that, in the case of a curved joint, the balls are controlled into the plane of symmetry by the shape of their ball tracks. For this purpose, the center of curvature of at least one section of the ball track does not lie in the plane of symmetry of the joint, but is offset from this plane of symmetry. A ball controlled in this way is advantageous to ensure adequate control of the ball in the joint at small bending angles. In the case of drives with large bending angles, in particular bending angles of more than 50 °, this leads to a small wrap angle in the outer region of the ball track, but in addition to such balls with a control function, the balls described are used according to the invention in ball tracks which extend at least partially concentrically. These so-called neutral balls do not load the cage in the axial direction and have a large wrap angle over the entire bending angle range. By combining the two types of ball tracks, the advantages of the two types of ball tracks can be utilized. Thus, by means of the neutral rail pair of the first type, it is possible to compensate for the insufficient degree of wrap and the low mechanical stability of the rail pair of the second type in the bent state of the joint.

At the same time, the second type of expansion, in particular the S-shaped expansion, of the ball track according to the invention enables a higher bending of the joint than in the case of a ball track with only one single curved section, the center point of which is offset from the joint center plane. The balls which move in the direction of the joint opening in the case of a bending of the joint can still be guided in the ball track over a greater bending range and contribute to the torque transmission.

As a whole, therefore, in the case of a constant velocity rotary joint having a large bending angle, the ratio made up of the torque transmission capacity and the structural space can be maximized. The friction losses between the components are reduced by the axial force neutrality (neutral balls) of the balls in the first type of track pair. These balls undergo a pure rolling motion. The control of the cage (and therefore also of the isokinetic movement plane of the balls) at small bending angles is accomplished by the balls (controlled balls) in the second type of track pairs. As the angle of bending increases, the neutral ball also partially supports the control due to the intermeshing of the ball tracks of the balls under bending. Due to the large number of balls that remain engaged, premature release of the balls can be tolerated when stretched under large bending angles.

The radii of curvature of the centerlines of the various ball tracks are selected accordingly. In one embodiment of the invention, the radius of curvature of the inner section and the diameter D of the associated ball are determined by the center line of the outer ball track of the track pair of the second type_KugelFor example between 1.5 and 2.5. This is achieved byIn this center line, the radius of curvature of the outer section and the diameter D of the associated ball bearing_KugelFor example between 1.0 and 10. In a further embodiment of the invention, the radius of curvature of the centre line of the track pair of the first type and the diameter D of the associated ball are such that_KugelFor example between 1.5 and 2.5.

Preferably, the same number of the two types of track pairs are provided, and the two types of track pairs are alternately arranged on the circumference. In particular, the number of balls is therefore even, so that the neutral balls and the controlled balls are arranged alternately. Preferably, the number of balls is at least eight or exactly eight. Thus, the four controlled balls and the four neutral balls may each be arranged at an angle of about 90 ° to each other. The at least three controlled balls in this arrangement enable a reliable control of the joint. It is therefore also possible to provide a total of six balls, that is to say three neutral balls in the first track pair and three controlled balls in the second track pair, alternately.

In one embodiment of the invention, the sections of the centre lines of the ball tracks of the track pairs of the second type which are bent counter to one another have further sections which are connected to these bent sections. The ball tracks thus do not necessarily have to be purely S-shaped, but the S-shape can also be formed by more than two segments with different curvatures. These other sections may be shaped linearly or curvedly.

The orientation of the ball tracks relative to the associated longitudinal axis of the joint component can be different. An inclined position of the ball tracks with respect to the longitudinal axis is conceivable, wherein, for example, the inclined position of the inner centre line is opposite to the inclined position of the outer centre line, so that the joint will be suitable of the type belonging to a cross-slot joint. However, the ball tracks are preferably each arranged in a radial plane. Furthermore, the joint according to the invention can be designed as a fixed joint or as a mobile joint.

According to one embodiment of the invention, for the track pairs of the second type and for the associated balls moving along the course of the respective outer and inner centre lines, the associated opening angle α maintains the respective basic direction of the opening thereof in the case of a maximally curved rotational joint. In other words: for the second type of track pair, the associated opening angle opens in a direction towards the open side of the joint outer part for all possible positions of the intersection of the outer and inner centre lines, which intersection defines the possible positions of the balls (but which are in principle dependent on the bending position of the joint).

Furthermore, according to another embodiment, the radius of the neutral outer ball track also expands in the direction towards the open side. Instead of being formed by a separate, concentrically arranged radius, the neutral ball tracks can also have at least one section with a different, opposite radius of curvature. One embodiment therefore provides that the first type of track pair of ball tracks is designed in such a way that the respective center line of the outer ball tracks of the first type of track pair has at least one inner section and one outer section, wherein the inner section is located on the connection side of the joint outer part and the outer section is located on the opening side of the joint outer part. The center of curvature of the inner section then lies in the joint center plane, while the center of curvature of the outer section lies outside the joint outer part. However, in another embodiment, the concentric curvature can also extend linearly, or the center of curvature of the extended section can lie offset from the joint center plane in the hollow volume of the joint outer part.

Drawings

Further advantages, features and expedient further developments of the invention result from the dependent claims and the following description of preferred exemplary embodiments with the aid of the drawings.

In the drawings:

fig. 1 shows a front view of an open side of an embodiment of a constant velocity rotary joint according to the present invention in a straightened position;

FIG. 2 shows a cross-sectional view of the embodiment of FIG. 1 along section line E-E;

fig. 3 shows a schematic view of the formation of the centre lines of two types of track pairs in a constant velocity rotary joint according to fig. 2;

fig. 4 shows a front view of the open side of the constant velocity rotary joint of fig. 1 in a bent position;

fig. 5 shows a cross-sectional view of the constant velocity rotary joint according to fig. 4 along the section line a-a; and

fig. 6 shows a cross-sectional view of the constant velocity rotary joint according to fig. 4 along the section line C-C.

Detailed Description

One embodiment of a constant velocity rotary joint 10 according to the invention is shown in fig. 1 and in the associated longitudinal section E-E along the two longitudinal axes La, Li of the joint of fig. 2. The constant velocity rotary joint has a joint outer member 11 and a joint inner member 12 which are pot-shaped. Eight balls, which are identical in diameter and are in number, are arranged between the joint outer part 11 and the joint inner part 12, two of which are indicated by way of example with the reference numerals 30 and 31. These balls are guided on the one hand in the outer ball tracks 20a, 20b and on the other hand in the inner ball tracks 40a, 40b, wherein again only the relevant ball tracks are denoted by reference numerals. The outer ball tracks 20a, 20b are formed on an inner circumferential surface of the joint outer 11 and extend from the open side 60 to the connecting side 61 of the joint outer 11. The joint outer 11 is formed, for example, with a journal (not shown) on its connection side 61.

The joint inner part 12 inserted into the hollow volume formed by the joint outer part 11 forms inner ball tracks 40a, 40b, respectively, which are located in pairs opposite the outer ball tracks 20a, 20b and which each accommodate one ball 30, 31. The joint inner part 12 forms, for example, a shaft receptacle 13, which is not shown in fig. 2, 5 and 6 for the sake of simplicity, however. In the case of intended use, the joint outer part 11 rotates about the first longitudinal axis La and the joint inner part 12 correspondingly rotates about the second longitudinal axis Li. Due to the different shapes of the ball tracks, in particular in the axial direction, all pairs formed by the outer ball tracks 20a, 20b and the inner ball tracks 40a, 40b by being spatially opposed can be divided into two types of track pairs, which are referred to below as first type of track pairs 20a, 40a and as second type of track pairs 20b, 40 b. The balls arranged in the track pairs of the respective type are indicated differently only for this assignment and not for structural differences, wherein the balls belonging to the track pairs of the first type 20a, 40a are indicated with 30 and the balls belonging to the track pairs of the second type 20b, 40b are indicated with 31.

The balls 30 relate to neutral balls in track pairs, the ball tracks of which have a center of curvature which lies in the joint center plane EM in the case of a straight joint. The balls 31 are controlled balls in a track pair, the ball track of which is composed of at least two sections which are curved in opposite directions, wherein the inner section of the outer ball track 20b is offset from the joint center plane EM in the direction towards the opening side 60. The outer sections expand with opposite radii in a direction toward the open side 60.

There is no distinction between the pairs of rails within one type and each type is evenly distributed in the circumferential direction, where they are arranged at 90 ° offset from each other on the inner circumferential surface of the joint outer part 11 or the outer circumferential surface of the joint inner part 12. These types of track pairs are arranged alternately in the circumference. Thus, there is an angle of 45 ° between the different types of track pairs. The section E-E thus extends through the neutral ball 30 and the controlled ball 31.

The balls 30, 31 are held in a common ball cage 50, wherein the centre points of the balls 30, 31 are held in a common plane, the so-called joint centre plane EM, which is perpendicular to the first longitudinal axis La and the second longitudinal axis Li (see fig. 2) in the case of a straight joint. In the case where the joint 10 is bent, as shown in fig. 5, the joint center plane EM corresponds to a plane bisected by an angle between the first longitudinal axis La and the second longitudinal axis Li. In this case, the spherical outer surface of the cage 50 abuts with play against the spherical inner surface of the joint outer part 11, and the spherical inner surface of the cage 50 abuts with play against the spherical outer surface of the joint inner part 12, so that the cage 50 can be freely pivoted between the two joint parts.

The structural differences of the type which essentially defines the track pairs should be made clear by means of the sectional view of fig. 2 and the schematic view of fig. 3, wherein the joints are each located in a straightened position in which the first longitudinal axis La and the second longitudinal axis Li are brought into agreement. For the sake of simplicity, but without limiting the invention thereto, it is assumed here that the balls 30, 31 each roll on the base line of the respective ball track, and therefore in the figures the course of the centre lines MN, MS of the outer ball tracks, determined by the ball centre points, corresponds to the course of the respective track base lines with a parallel offset of the ball radii.

The design of the outer ball track 20a and the inner ball track 40a belonging to the first type of track pair is explained in more detail below with the aid of fig. 2 and 3. The contact line of the outer ball track 20a belonging to the first type and the centre line MN extending parallel to this contact line are described by a concentric circular track whose circular centre point 0 lies on the joint centre plane EM at the point of intersection of this concentric circular track with the first longitudinal axis La and with the second longitudinal axis Li. For the first type of track pair, the opening angle β is thus 0 °. Due to the concentric circular course of the center line MN, the angle remains 0 ° in the pivoting range. In other words, the balls 30 belonging to the track pair of the first type are not subjected to axial forces both in the straightened position and in the bent position of the joint 10, due to the curvature of the associated ball tracks 20a, 40 a. Depending on the deflection of the joint, axial forces can also act on the balls 30, which, however, are caused by the structural form of the joint and not by the specific curvature of its ball track and the resulting opening angle β. For example, in the case where the joint is bent, an axial force acts on the balls located at positions where the outer ball way and the inner ball way overlap each other.

Fig. 2 shows the radius R3a of the outer ball track 20a and the radius R3i of the inner ball track 40a of such a pair of neutral tracks having concentric radii of curvature. In contrast, in fig. 3, only the center line MN of the outer ball track 20a is shown and its radius R3 to the joint center point 0 is given. In this exemplary embodiment, the neutral rail is thus produced by a single radius R3(R3i, R3a) arranged concentrically to the joint center 0.

In the case of the second type of control track pair with balls 31, the inner ball track 20b and the outer ball track 40b, or their centre lines, describing the path of the balls, are composed of at least two sections, which in this embodiment are curved in opposite directions. However, the radius of curvature of the outer section MSa may also be infinite, that is to say the center line MS extends linearly through the outer section MSa. In the embodiment of fig. 3, the center of curvature of the inner section MSi of the centre line MS of the outer ball track 20b is offset from the joint centre plane EM and is offset in the direction towards the open side 60, preferably on the longitudinal axis La. The resulting radius R1 is given. The center of curvature X of the outer section MSa of the center line MS of the outer ball track 20b is located outside the hollow volume of the joint outer member 11. In this case, the center of curvature is likewise offset from the joint center plane EM and is offset in the direction toward the opening side 60. The resulting radius R2 is given.

Fig. 2 considers this with respect to the outer ball track 20b and the inner ball track 40b, wherein the radius R1a and the radius R2a with the associated centers of curvature OT' and Xa are indicated for the outer ball track 20 b. The same applies to the inner ball track 40b having a radius R1i, a radius R2i, and the associated centers of curvature OT "and Xi.

The opening angle α of the ball track for the controlled balls 31 and the opening angle β of the ball track for the neutral balls 30 can also be determined from fig. 3. Furthermore, fig. 2 and 3 show that a tangential transition 70 between the curvature of the inner section MSi and the curvature of the outer section MSa is preferably located relatively close to the opening 60. The angle δ between the joint center plane EM and the line between the joint center point 0 and the tangential transition or transition point 70 is preferably greater than 8 °. In particular, the angle lies between 16 ° and 18 °, particularly preferably around 17 °. For this reason, the radii R1 and R2 are selected accordingly in order to result in a transition as late as possible.

In one embodiment, the radius of curvature R1 of the inner section MSi and the diameter D of the associated ball 31_KugelFor example between 1.5 and 2.5. The radius of curvature R2 of the outer section MSa and the diameter D of the associated ball 31_KugelFor example between 1.0 and 10. Furthermore, the radius of curvature R3 of the center line MN of the first track pair and the diameter D of the associated ball 30_KugelFor example between 1.5 and 2.5.

Fig. 4 shows the constant velocity joint according to fig. 1 in a bent state. Fig. 5 shows a section line a-a passing through two opposing neutral balls 30 from the center, while fig. 6 shows a section line C-C passing slightly offset through two opposing neutral balls 30. In this case, it is apparent that the neutral ball 30 is released early in the case of a strong bending of the joint. However, this can be tolerated because of the large number of balls that remain engaged.

List of reference numerals:

10 constant velocity rotary joint

11 joint outer member

12 joint inner part

13 axle housing part

20a, 20b outer ball track

30 balls, neutral

31 balls, controlled

40a, 40b inner ball track

50 holding rack

60 opening side

61 connecting side

70 tangent transition, transition point

R1, R1a and R1i are connected at the radius and staggered

R2, R2a and R2i are staggered on the side of the radius opening

R3, R3a and R3i are concentric

Center plane of EM joint

Longitudinal axis of Li-joint internal component

Longitudinal axis of La joint outer member

0 center point of joint

Center of curvature OT', OT ″)

Center points of X, Xi, Xa

MS, MN center line

MSi internal section

MSa part section

Opening angle of alpha and beta