CV joint for motor vehicle

Abstract

The invention relates to a cardan joint (1) comprising a first element (11) intended to be coupled to a first external shaft and a second element (12) intended to be coupled to a second external shaft, a connecting member (13) placed in an intermediate position between the first element (11) and the second element (12), a first coupling member (14) connecting the first element (11) to the connecting member (13), a second coupling member (15) connecting the second element (12) to the connecting member (13), so that a torque can be transmitted between the first element (11) and the second element (12) through the connecting member (13) and according to a cardan-type connection.According to the invention, the first coupling member (14) and the second coupling member (15) each have oblong openings (111, 121) arranged respectively at the axial ends of the first element (11) and the second element (12), the connecting member (13) having a first stud (131) and a second stud (133) arranged engaged respectively in the first oblong opening (111) of the first element (11) and the second oblong opening (121) of the second element (12). Figure to be published with the abbreviation: Fig. 1.

Description

Title of the invention: Universal joint for motor vehicles

[0001] The technical context of the present invention is that of rotating coupling elements, and in particular those used in the automotive field, without limitation. More specifically, the invention relates to a universal joint.

[0002] Although not limited to the field of motor vehicles, the present invention will be described through this context of use.

[0003] In the prior art, motor vehicles equipped with universal joints are known, allowing the coupling of two non-coaxial rotating shafts or shafts whose angular position relative to each other can change. These rotating shafts can, for example, be formed by a drive shaft of a motor and a wheel shaft. In such configurations, the axial position of the universal joint is defined by the length and position of each rotating shaft connected to it by the universal joint. It is also understood that the axial position of known universal joints is, on the one hand, predetermined by the rotating shafts and, on the other hand, invariant over time and according to the uses and stresses of these mechanical assemblies during the driving phases of the motor vehicles equipped with them.

[0004] More specifically, in the field of motor vehicles equipped with a rigid rear axle and leaf springs, such a rear axle is driven by the rotational movement of the driveshaft, which transfers power from the engine to the front of the vehicle. It is well known that a rear axle with a leaf spring does not move strictly along the vertical axis. Indeed, depending on the road geometry and the speed of the motor vehicle, the leaf spring compresses, causing the shackles to pivot and resulting in a slight variation in the wheelbase relative to the position of the rear wheels. In other words, the bending movement of the leaf spring generates an axial component on the drivetrain, leading to tensile forces on the drivetrain between the engine and the rear axle.Thus, in practice, the position of the universal joint equipping such a transmission chain is not invariant due to the action of the leaf spring equipping the rear axle.

[0005] To compensate for these invariances, and in order to maintain continuous transmission along the drive chain, the use of a universal joint installed on the transmission shaft is known. This joint allows, in a known manner, the correction of angular misalignments, in series with a sliding joint located near the universal joint. This sliding joint compensates for wheelbase variations, i.e. longitudinal variations in the relative position between the universal joint and the rear axle, due to the action of the leaf springs.

[0006] A known disadvantage of this configuration lies in the need to install two joints mounted in series - the universal joint and the sliding joint - in order to ensure the transmission of movement to the rear axle during wheelbase variations, which generates additional costs, equipment and labor, as well as increased problems of reliability, wear and maintenance.

[0007] The present invention aims to provide a new universal joint in order to address at least largely the previous problems and to lead to other advantages.

[0008] Another object of the invention is to simplify known transmission chains while allowing a degree of axial adjustment of them.

[0009] Another object of the invention is to reduce the costs of development, production and maintenance of such transmission chains.

[0010] According to a first aspect of the invention, at least one of the aforementioned objectives is achieved with a universal joint comprising:

[0011] - a first element intended to be coupled to a first external tree;

[0012] - a second element intended to be coupled to a second external tree;

[0013] - a connecting member placed in an intermediate position between the first element and the second element;

[0014] - a first coupling member connecting the first element to the connecting member, the the first coupling element being configured to allow the transmission of torque around an axis of rotation of the cardan joint;

[0015] - a second coupling member connecting the second element to the connecting member, the second coupling member being configured to allow the transmission of torque around the axis of rotation of the cardan joint, so that the first element, the second element, the linking member, the first coupling member and the second coupling member together form a cardan-type link.

[0016] According to the invention, the first coupling member and the second coupling member each have an oblong opening provided respectively in the first element and the second element, and in that the connecting member has a first stud and a second stud arranged in the shape of a cross and engaged respectively in the oblong opening of the first element and the oblong opening of the second element.

[0017] In the context of the present invention, an elongation direction is defined as following the principal extension direction of the object to which it relates. Thus, the elongation direction of the first element is the principal elongation direction of the first element, that is to say, for example, the elongation axis of its extension cylindrical. Similarly, the elongation direction of the second element is the principal elongation direction of the second element, that is, for example, the elongation axis of its cylindrical extension.

[0018] In the context of the present invention, the first element forms a first part of the universal joint located on a first side of the sliding pivot joint proposed by the universal joint according to the invention. The first element is integral with the first external shaft to which the universal joint according to the invention is intended to be connected. By way of non-limiting example, the first element may, for instance, take the form of a cylindrical bearing surface, forming, for example, a terminal end of the first external shaft. The cylindrical bearing surface forming the first element extends along a first direction of elongation.

[0019] In the context of the present invention, the second element forms a second part of the universal joint located on a second side of the sliding pivot joint proposed by the universal joint according to the invention. The second part of the universal joint is opposite the first part of the universal joint, relative to the connecting member. The second element is integral with the second outer shaft to which the universal joint according to the invention is intended to be connected. By way of non-limiting example, the second element may, for instance, take the form of a cylindrical bearing, forming, for example, a terminal end of the second outer shaft. The cylindrical bearing forming the second element extends along a second direction of elongation. The second direction of elongation is intended to be oriented differently from the first direction, due to the presence of the sliding pivot joint between the first element and the second element.

[0020] In the context of the present invention, the connecting member forms a floating element housed in the universal joint and between the first and second elements. The connecting member is configured to allow the transmission of torque between the first and second elements—thus defining a pivot joint. However, in a particularly ingenious manner, the connecting member is also configured to be movable in translation between the first and second elements—thus defining a sliding joint, concurrently with the establishment of the aforementioned pivot joint.

[0021] In the context of the present invention, the first coupling member establishes a pivot joint between the connecting member and the first element, while also allowing the transmission of torque between the first element and the connecting member. The torque transmitted by the first coupling member corresponds to a rotation about an axis of rotation parallel or substantially parallel to the direction of elongation of the first element. The rotation allowed by the pivot joint established by the first coupling member is a rotation about an axis of rotation perpendicular to the direction elongation of the first element. In the context of the present invention, the first coupling member refers to the mechanical interface between the connecting member and the first element, including in particular some of their technical characteristics and / or some of their functional characteristics.

[0022] In the context of the present invention, the second coupling member establishes a pivot joint between the connecting member and the second element, while also allowing the transmission of torque between the second element and the connecting member. The torque transmitted by the second coupling member corresponds to a rotation about an axis of rotation parallel or substantially parallel to the direction of elongation of the second element. The rotation permitted by the pivot joint established by the second coupling member is a rotation about an axis of rotation perpendicular to the direction of elongation of the second element. In the context of the present invention, the second coupling member refers to the mechanical interface between the connecting member and the second element, including in particular some of their technical characteristics and / or some of their functional characteristics.

[0023] In the context of the present invention, the oblong opening of each first and second element defines the mechanical interactions between said elements and the connecting member. The oblong opening thus forms a feature of the first and second elements at their axial ends, located near and opposite the connecting member. The oblong opening interacts with the connecting member, and in particular with each of its first and second studs. In other words, the first stud is engaged through the oblong opening of the first element to simultaneously transmit torque and allow rotation, as previously mentioned. Similarly, the second stud is engaged through the oblong opening of the second element to simultaneously transmit torque and allow rotation, as previously mentioned.Of course, the oblong opening forming each coupling member can take different shapes depending on the geometries of the universal joint according to the invention. However, ingeniously, the oblong opening has its own elongation direction, determined by the elongation direction of the element on which it is formed. Thus, the first oblong opening stretches along the elongation direction of the first element, while the second oblong opening stretches along the elongation direction of the second element.

[0024] In the context of the present invention, the first stud of the connecting member forms a prismatic bearing surface that extends at least partially through the oblong opening of the first element. Thus, the connecting member comprises a central body that is housed at a radially central portion of the first element, while the first stud extends radially outwards, relative to the direction The elongation of the first element is directed towards the oblong opening that forms the first coupling member. Thus, the first stud extends across the oblong opening to work with it, simultaneously transmitting a torque along the elongation direction of the first element and allowing the first element to rotate around the first stud along the elongation direction of said first stud.

[0025] In the context of the present invention, the second stud of the connecting member forms a prismatic bearing surface that extends at least partially through the oblong opening of the second element. Thus, the central body of the connecting member is housed at a radially central portion of the second element, while the second stud extends radially outward, relative to the elongation direction of the second element, toward the oblong opening forming the second coupling member. Therefore, the second stud extends across the oblong opening in order to work with it to simultaneously transmit a torque along the elongation direction of the second element and allow the rotation of the second element around the second stud along an elongation direction of said second stud.

[0026] Thus, the universal joint according to the first aspect of the invention makes it possible, on the one hand, to correct angular misalignment by means of the two pivot joints provided by each coupling member and, on the other hand, to correct axial misalignment by means of the sliding joint established by the movable connecting member in translation between the first element and the second element, via the possibility of translation of each stud in the respective oblong openings. Thus, compared with the prior art, the sliding joint is no longer necessary and can be eliminated to perform the same function, namely correcting angular and axial misalignment on a transmission chain.

[0027] Furthermore, the invention according to the first aspect is simpler to implement and leads to cost savings during installation as well as during maintenance, since fewer parts need to be installed or repaired. Finally, the reliability and robustness of a transmission chain equipped with such a universal joint according to the invention are thereby enhanced.

[0028] The universal joint according to the first aspect of the invention advantageously comprises at least one of the improvements below, the technical characteristics forming these improvements being able to be taken alone or in combination:

[0029] - the first stud and the second stud are made of material. By "made of material" "It is understood that the first dowel and the second dowel are produced using the same manufacturing process and form a single monolithic unit. Consequently, the The first stud and the second stud cannot be detached from each other without their physical integrity being compromised, totally or partially;

[0030] - the first stud extends along a first elongation direction and the second The stud extends along a second elongation direction different from the first elongation direction. More generally, the first stud and the second stud extend secantly with respect to each other. More particularly, according to a preferred embodiment of the invention, the first stud and the second stud extend perpendicularly with respect to each other;

[0031] - the connecting member is housed in a free space arranged between an end axial of the first element and an axial end of the second element. Thus, the first element and the second element together form, at their respective axial ends, a cavity in which the connecting member is housed during its installation. When the first stud of the moving member is engaged in the oblong opening of the first element and the second stud of the moving member is engaged in the oblong opening of the second element, then the connecting member is engaged and can no longer be unintentionally detached from the first and second elements, while allowing the translation, torque transmission and rotation mentioned previously;

[0032] - a cross-section of the first stud is circular and / or a cross-section of the second stud is circular. At the very least, the cylindrical bearing surface of the first stud collaborating with the oblong opening of the first element is circular in shape, and / or the cylindrical bearing surface of the second stud collaborating with the oblong opening of the second element is circular in shape;

[0033] - the oblong opening of the first element and the oblong opening of the second Each element forms an axial slot along a direction of elongation of the first element and the second element respectively. This advantageous configuration allows the connecting member to have axial mobility limited by the length of each oblong opening;

[0034] - the first element forms a bore, one axial end of which is equipped with The oblong opening. In particular, the oblong opening has an axial slot passing completely through the bore, perpendicular to the elongation direction of the first element. The oblong opening is stretched along the elongation direction of the first element, so that the first stud, engaged across the oblong opening forming the first coupling member, is retained by sliding within said oblong opening. Thus, this ingenious arrangement allows for axial adjustment of the position of the universal joint according to the invention, relative to the first element.

[0035] - similarly, the second element forms a bore, one end of which The axial section is equipped with an oblong opening. In particular, the oblong opening has an axial slot passing completely through the bore, perpendicular to the elongation direction of the second element. The oblong opening is stretched along the elongation direction of the second element, so that the second stud, engaged across the oblong opening forming the second coupling member, is retained by sliding within said oblong opening. Thus, this ingenious arrangement allows for axial adjustment of the position of the universal joint according to the invention, relative to the second element;

[0036] - the dimensions and shapes of the first stud are advantageously identical to those of the second stud. Complementarily, the dimensions and shapes of the oblong opening of the first element are advantageously identical to those of the oblong opening of the second element;

[0037] - the free ends of the first stud are engaged in the oblong opening of the first element, and the free ends of the second stud are engaged in the oblong opening of the second element.

[0038] - an axial elongation length of the oblong opening of the first organ of The coupling and / or the second coupling element is greater than the diameter of the first stud and / or the second stud respectively. By way of non-limiting example, the axial elongation length is greater than 10 mm, preferably between 30 mm and 80 mm.

[0039] According to a second aspect of the invention, a motor vehicle is proposed comprising a transmission chain equipped with a cardan joint conforming to the first aspect of the invention or to any one of its improvements.

[0040] In particular, the transmission chain of such a motor vehicle comprises a first external shaft having a first axial end integral with the first element of the cardan joint, and a second axial end integral with the second element of the cardan joint.

[0041] The first external tree is, for example, a leading tree, and the second external tree is a led tree.

[0042] Furthermore, the motor vehicle according to the second aspect of the invention is advantageously equipped with a leaf spring suspension system. In particular, the motor vehicle according to the second aspect of the invention comprises a wheel assembly coupled to the drive chain and equipped with a leaf spring type suspension system.

[0043] Various embodiments of the invention are provided, incorporating, according to all their possible combinations, the different optional features set out here.

[0044] Other features and advantages of the invention will become apparent from the following description on the one hand, and from several illustrative and non-limiting examples of embodiments given by reference to the accompanying schematic drawings on the other hand, in which:

[0045] [Fig. 1] illustrates a three-dimensional view of an example of an embodiment of the cardan joint conforming to the first aspect of the invention;

[0046] [Fig.2] illustrates three top views of the cardan joint of [Fig. 1] and according to three different axial configurations;

[0047] [Fig.3] illustrates a top view of the cardan joint of [Fig.1] according to an angular misalignment configuration.

[0048] Of course, the features, variants, and different embodiments of the invention can be combined in various ways, provided they are not incompatible or mutually exclusive. In particular, variants of the invention may be conceived comprising only a selection of features, described hereafter in isolation from the other described features, if this selection of features is sufficient to confer a technical advantage or to differentiate the invention from the prior art.

[0049] In particular, all the variants and all the embodiments described are combinable with each other, if nothing prevents this combination from a technical point of view.

[0050] In the figures, the elements 11,12 common to several figures retain the same reference.

[0051] With reference to FIGURES 1 to 3, the invention addresses a universal joint 1 comprising:

[0052] - a first element 11 intended to be coupled to a first external tree, not represented in the FIGURES;

[0053] - a second element 12 intended to be coupled to a second external tree, not represented in the FIGURES;

[0054] - a connecting member 13 placed in an intermediate position between the first element 11 and the second element 12;

[0055] - a first coupling member 14 connecting the first element 11 to the member of linkage 13, the first coupling member 14 being configured to allow the transmission of a torque around a first axis of rotation of the cardan joint 1 parallel to a first direction of elongation 01 of the first element 11;

[0056] - a second coupling member 15 connecting the second element 12 to the member of linkage 13, the second coupling member 15 being configured to allow the transmission of a torque around a second axis of rotation of the cardan joint 1 parallel to a second direction of elongation 02 of the second element 12.

[0057] Thus, the first element 11, the second element 12, the connecting member 13, the first coupling member 14 and the second coupling member 15 together form a cardan-type connection.

[0058] According to the invention, the first coupling member 14 and the second coupling member 15 each have an oblong opening provided respectively in the first element 11 and the second element 12, and the connecting member 13 has a first stud 131 and a second stud 133 arranged in the form of a cross relative to each other and engaged respectively in the oblong opening of the first element 11 and the oblong opening of the second element 12.

[0059] More particularly, as can be seen in [Fig. 1] in particular, the first element 11 is in the form of a shaft end and forms a first bore which extends along the first elongation direction 01. At its axial end located opposite the connecting member 13, the first element 11 has a central opening which provides two lateral flanges located on either side of a median plane which extends along the first elongation direction 01 and along the elongation direction of the first stud 131. Thus, each flange of the first element 11 is located radially opposite the other, thereby allowing the connecting member 13 to be housed and the axial end of the second element 12 to be received.

[0060] Similarly, the second element 12 is in the form of a shaft end and forms a second bore extending along the second elongation direction 02. At its axial end located opposite the connecting member 13, the second element 12 has a central opening which provides two lateral flanges located on either side of a median plane extending along the second elongation direction 02 and along the elongation direction of the second stud 133. Thus, each flange of the second element 12 is located radially opposite the other, thereby allowing the connecting member 13 to be housed and the axial end of the first element 11 to be received.

[0061] It is understood that this arrangement allows both an angular misalignment between the first element 11 and the second element 12 - as seen in [Fig.3], but also allows the establishment of several angular configurations between the first element 11 and the second element 12, as illustrated in diagrams A1, A2, A3 of [Fig.2].

[0062] The connecting member 13 is freely mounted in the space delimited by the flanges at the axial ends of each first element 11 and second element 12. The connecting member 13 has a cross shape, such that the first stud 131 and the second stud 133 extend respectively in intersecting directions, and more particularly perpendicular to each other in the embodiment illustrated in the FIGURES. The connecting member 13 thus forms a central body located axially and radially between the first element 11 and the second element 12. The flanges of each axial end of the elements 11,12 extend on either side of the connecting member 13, that is to say above and laterally with respect to it.

[0063] The first stud 131 forms a protrusion which extends in the direction of each flange of the first element 11. More particularly, the first stud 131 forms a cylindrical bearing which extends in a straight line in a direction perpendicular to the first elongation direction 01 of the first element 11.

[0064] The first stud 131 has first free ends 132 which are located at each flange of the first element 11. In particular, the first free ends 132 extend through the first oblong opening 111 provided on the first element 11, so as to form a retaining element for the first stud 131 of the connecting member 13. This retaining element allows both a relative translation between the first element 11 and the first stud 131 of the connecting member 13, but also the transmission of a torque oriented around the first elongation direction 01 between the first element 11 and the connecting member 13, but also the relative rotation of the connecting member 13 with respect to the first element 11 along a direction perpendicular to the first elongation direction 01.

[0065] Similarly, the second stud 133 forms a protrusion which extends in the direction of each flange of the second element 12. More particularly, the second stud 133 forms a cylindrical bearing surface which extends in a straight line in a direction perpendicular to the second elongation direction 02 of the second element 12.

[0066] The second stud 133 has second free ends 134 which are located at each flange of the second element 12. In particular, the second free ends 134 extend through the second oblong opening 121 provided on the second element 12, so as to form a retaining element for the second stud 133 of the connecting member 13. This retaining element allows both a relative translation between the second element 12 and the second stud 133 of the connecting member 13, but also the transmission of a torque oriented around the second elongation direction 02 between the second element 12 and the connecting member 13, but also the relative rotation of the connecting member 13 with respect to the second element 12 along a direction perpendicular to the second elongation direction 02.

[0067] The oblong openings 111, 121 are identical on the first element 11 and on the second element 12. In other words, the first oblong opening 111 has the same shape and dimensions as the second opening. Each oblong opening extends along the direction of elongation of the element on which It is formed. Thus, the first oblong opening 111 extends along the first elongation direction 01, and the second oblong opening 121 extends along the second elongation direction 02.

[0068] As can be seen more particularly in [Fig. 1], the oblong openings 111, 121 are provided on each of the flanges at each axial end of the elements 11, 12 of the universal joint 1 according to the invention. In other words, the first oblong opening 111 forms a through slot, relative to a direction perpendicular to the first elongation direction 01, and which passes completely through the first element 11 and its two flanges at its axial ends. Similarly, the second oblong opening 121 forms a through slot, relative to a direction perpendicular to the second elongation direction 02, and which passes completely through the second element 12 and its two flanges at its axial ends.

[0069] The oblong openings 111, 121 extend in a straight line along the elongation direction associated with the elements 11, 12 on which they are formed.

[0070] A dimension of the oblong openings 111, 121 is such as to allow the engagement and insertion of each free end of the associated stud. In other words, the first oblong opening 111 is configured to allow the insertion of the first free end 132 of the first stud 131, and the second oblong opening 121 is configured to allow the insertion of the second free end 134 of the second stud 133. Preferably, a dimension of the first oblong opening 111 taken along a direction perpendicular to the first elongation direction 01 is greater than—and preferably equal to—a dimension of the first stud 131 taken at its first free end 132 and along this same direction. This advantageous configuration thus makes it possible to achieve a backlash-free rotational coupling between the first element 11 and the first stud 131, for the torque transmission mentioned above.Similarly, a dimension of the second oblong opening 121 taken along a direction perpendicular to the second elongation direction 02 is greater than – and preferably equal to – a dimension of the second stud 133 taken at its second free end 134 and along this same direction. This advantageous configuration thus makes it possible to achieve a backlash-free rotational coupling between the second element 12 and the second stud 133, for the torque transmission mentioned previously.

[0071] With reference to [Fig.2], the advantage of the invention is illustrated by several diagrams A1, A2, A3 illustrating the axial mobilities of the cardan joint 1 according to the invention:

[0072] - the first diagram (Al) represents the universal joint 1 in a first axial configuration, in which the second element 12 is axially the away from the first element 11. For this purpose, the second free end 134 of the second stud 133 is engaged in the second oblong opening 121 of the second element 12 at the level of a part of said second oblong opening 121 most proximal to the first element 11;

[0073] - the third diagram (A3) represents the universal joint 1 in a third axial configuration opposite to the first axial configuration, in which the second element 12 is axially closest to the first element 11. For this purpose, the second free end 134 of the second stud 133 is engaged in the second oblong opening 121 of the second element 12 at the level of a part of said second oblong opening 121 most distal of the first element 11;

[0074] - the second diagram (A2) represents the universal joint 1 in a configuration intermediate between those illustrated in the first diagram (A1) and the third diagram (A3). For this purpose, the second free end 134 of the second stud 133 is engaged at a median position of the second oblong opening 121 of the second element 12.

[0075] Finally, [Fig.3] illustrates an angular misalignment configuration of the cardan joint 1 according to the invention, in which the first elongation direction 01 of the first element 11 is made non-parallel and non-coaxial with the second elongation direction 02 of the second element 12, while allowing the transmission of a torque between them through the connecting member 13.

[0076] Thus, the cardan joint 1 according to the invention solves the technical problem in that it allows, through a single piece, both the transmission of a torque despite an angular misalignment between the first element 11 and the second element 12, but also an axial freedom allowing several axial configurations between the first element 11 and the second element 12.

[0077] In summary, the invention relates to a cardan joint 1 comprising a first element 11 intended to be coupled to a first external shaft and a second element 12 intended to be coupled to a second external shaft, a connecting member 13 placed in an intermediate position between the first element 11 and the second element 12, a first coupling member 14 connecting the first element 11 to the connecting member 13, a second coupling member 15 connecting the second element 12 to the connecting member 13, so that a torque can be transmitted between the first element 11 and the second element 12 through the connecting member 13 and according to a cardan-type connection.According to the invention, the first coupling member 14 and the second coupling member 15 each have oblong openings 111, 121 arranged respectively at the axial ends of the first element 11 and the second element 12, the connecting member 13 having a first stud 131 and a second stud 133 arranged engaged respectively in the first oblong opening. 111 of the first element 11 and the second oblong opening 121 of the second element 12.

[0078] Of course, the invention is not limited to the examples just described, and many modifications can be made to these examples without departing from the scope of the invention. In particular, the various features, forms, variants, and embodiments of the invention can be combined with one another in various ways, provided they are not incompatible or mutually exclusive. In particular, all the variants and embodiments described above are combinable with each other.

Claims

Demands

1. Cardan joint (1) comprising: - a first element (11) intended to be coupled to a first external shaft; - a second element (12) intended to be coupled to a second external shaft; - a connecting member (13) placed in an intermediate position between the first element (11) and the second element (12); - a first coupling member (14) connecting the first element (11) to the connecting member (13), the first coupling member (14) being configured to allow the transmission of a torque around an axis of rotation of the cardan joint (1);- a second coupling member (15) connecting the second element (12) to the linking member (13), the second coupling member (15) being configured to allow the transmission of a torque around the axis of rotation of the cardan joint (1), so that the first element (11), the second element (12), the linking member (13), the first coupling member (14) and the second coupling member (15) together form a cardan-type link; characterized in that the first coupling member (14) and the second coupling member (15) each have an oblong opening arranged respectively in the first element (11) and the second element (12), and in that the connecting member (13) has a first stud (131) and a second stud (133) arranged in the shape of a cross and engaged respectively in the oblong opening of the first element (11) and the oblong opening of the second element (12).

2. Cardan joint (1) according to the preceding claim, wherein the first stud (131) and the second stud (133) are made of material.

3. Cardan joint (1) according to any one of the preceding claims, wherein the first stud (131) and the second stud (133) extend perpendicularly to each other.

4. Cardan joint (1) according to any one of the preceding claims, wherein a cross-section of the first stud (131) is circular.

5. Cardan joint (1) according to any one of the preceding claims, wherein a cross-section of the second stud (133) is circular.

6. Cardan joint (1) according to any one of the preceding claims, wherein the oblong opening of the first element (11) and the oblong opening of the second element (12) each form an axial slot along an elongation direction of the first element (11) and the second element (12) respectively.

7. Cardan joint (1) according to any one of the preceding claims, wherein free ends of the first stud (131) are engaged in the oblong opening of the first element (11), and free ends of the second stud (133) are engaged in the oblong opening of the second element (12).

8. Cardan joint (1) according to any one of the preceding claims taken in combination with claims 4 and 5, wherein an axial elongation length of the oblong opening of the first coupling member (14) and / or the second coupling member (15) is greater than a diameter of the first stud (131) and / or the second stud (133) respectively.

9. Motor vehicle comprising a transmission chain equipped with a universal joint (1) according to any one of the preceding claims.

10. Motor vehicle according to the preceding claim, wherein the motor vehicle comprises a wheel assembly coupled to the transmission chain and equipped with a leaf spring type damping system.

Images