Rivets and assemblies comprising rivets

Abstract

A rivet (30) extending axially between a head (31) and a foot (32) prior to assembly and comprising a body (33) axially located between the head and the foot, the body comprising a first portion (34) having a first diameter (D1) and a second portion (35) having a second diameter (D2) smaller than the first diameter (D1).

Description

Technical Field

[0001] This invention relates to fastening elements, and more particularly to rivets, assemblies including such rivets, and methods of manufacturing such assemblies. Background Technology

[0002] Rivets are commonly used as fastening elements to secure different parts together. They are permanent assembly and fastening components. They allow users to easily connect different parts together.

[0003] Rivets are typically metal, solid or hollow cylindrical rods. One end of the rivet has a head, meaning it has a larger cross-section. The other end is flattened and widened by compression to secure the components that are to be riveted together. This is riveting.

[0004] Components that are to be fixed together, such as two plates, are pre-drilled with holes that allow the shank of a rivet to pass through them.

[0005] There are also rivets in the form of cylindrical rods, whose ends are flattened and widened by compression. This is a double riveting.

[0006] Compared to single riveting, double riveting allows for optimized fastening at both ends of the rivet by minimizing the gap between the rivet and the components held together by the rivet.

[0007] The disadvantages of double riveting are that the installation time is longer due to the deformation at both ends of the shank, leading to an increased risk of errors, misalignment, and / or deformation. Furthermore, the holes formed in the components to be joined to accommodate the rivets must have a special shape (tapered), which is more complex and expensive to manufacture. Summary of the Invention

[0008] One object of the present invention is to provide a rivet that allows for optimal fastening like double riveting without its disadvantages.

[0009] To this end, the present invention provides a rivet that extends axially between a head and a foot before assembly and includes a body axially located between the head and the foot, the body comprising a first portion and a second portion, characterized in that the first portion has a first diameter and the second portion has a second diameter smaller than the first diameter.

[0010] Therefore, the rivet body according to the invention has a dual diameter. This dual diameter allows the rivet according to the invention to be easily inserted into a notch in a component secured by the side of the rivet body with the smaller diameter, i.e., the second diameter, and also allows for seamless or slightly gapless insertion into at least one of the components to be joined together, thereby optimizing the connection between the rivet and at least one component without subsequent deformation of the rivet due to the larger diameter, i.e., the first diameter. This dual function is guaranteed without additional deformation of the rivet. Therefore, rivet assembly is optimized compared to conventional rivets without increasing assembly time or adding additional stress to the components to be assembled.

[0011] One object of the present invention is to provide a two-element assembly comprising a rivet that allows for optimal fastening of the two elements like a double riveting without its disadvantages.

[0012] To this end, the present invention provides a component, particularly a pendulum body for a pendulum damping device for equipping a vehicle's transmission before assembly, the component comprising, before assembly:

[0013] - A first element having a first notch, the first notch having a sixth diameter.

[0014] - The third element has a third cut, the third cut having an eighth diameter, the eighth diameter being the same as the sixth diameter of the first cut of the first element.

[0015] - A rivet, extending axially between the head and feet, and comprising a body axially located between the head and feet.

[0016] The body of the rivet includes a first portion having a first diameter and a second portion having a second diameter smaller than the first diameter.

[0017] Therefore, the dual-diameter body of the rivet in the assembly according to the invention allows the rivet to be easily inserted into the first and second cuts of the first and second elements of the assembly, respectively, through the side of the rivet body with the smaller diameter (i.e., the second diameter), and also allows for insertion into the first cut of the first element without gap or with a small gap, thereby optimizing the connection between the rivet and the first element without deforming the rivet through the larger diameter, i.e., the first diameter. This dual function is guaranteed without additional deformation of the rivet. Therefore, rivet assembly is optimized compared to conventional rivets without increasing assembly time or adding additional stress to the components to be assembled. The cuts in the two elements of the assembly are identical.

[0018] The rivet according to the invention may further include one or more of the following optional features, or the rivet of the component according to the invention may further include one or more of the following optional features:

[0019] The rivets are solid or semi-drilled.

[0020] The foot is adaptable to deformation, which facilitates riveting, especially cold riveting.

[0021] The head has a fourth diameter that is larger than the first diameter; therefore, the head allows for control of the rivet's positioning before riveting, which is beneficial for its use.

[0022] The first part makes axial contact with the head, and the second part makes axial contact with the foot; therefore, it is convenient to insert rivets into the components to be fixed together.

[0023] The first part makes axial contact with the foot, and the second part makes axial contact with the head; therefore, the separation of one or more elements already inserted into the rivet is restricted even before the foot of the rivet deforms.

[0024] The body comprises two second parts, with the first part axially located between the two second parts; this type of rivet can be adapted to certain environments.

[0025] The first diameter is continuous; therefore, the rivet is simpler and cheaper to produce, and easier to assemble.

[0026] The second diameter is continuous; therefore, the rivet is simpler and cheaper to produce, and easier to assemble.

[0027] The body also includes an intermediate portion located axially between the first portion and the second portion, the intermediate portion having a third diameter between the second diameter and the first diameter; the third diameter is smaller than the first diameter and larger than the second diameter; the intermediate portion facilitates the insertion of the first portion into the cut, for example by a push-fit.

[0028] The third diameter is reduced; therefore, the transition between the first and second diameters is smooth, which facilitates the insertion of the first part.

[0029] The foot has a fifth diameter that is less than or equal to the second diameter; the foot facilitates the insertion of rivets into the cut.

[0030] The first part of the body includes a spline; one or more splines are present on the first part of the body such that local deformation of the first part can be obtained at the edges of the one or more splines; these local deformations allow the diameter of the first part to be locally increased in order to reduce the gap between the rivet insertion cuts without increasing the force required to insert into the cuts; thus, the one or more splines allow for local deformation of the rivet during assembly for the latter.

[0031] The spline is extended axially; the assembly of the rivets has been optimized.

[0032] The components according to the invention may further include one or more of the following optional features:

[0033] Another subject of the invention is a component, particularly a pendulum body for a pendulum damping device for equipping a vehicle's transmission, which, prior to assembly, comprises a first element and a rivet according to the invention, the first element having a first slit having a sixth diameter, wherein the first diameter of a first portion of the rivet body is equal to the sixth diameter of the first slit of the first element.

[0034] Therefore, the rivet and the first element form a pre-assembleable assembly. The rivet is rigidly secured to the first element without deformation. Creating this assembly upstream reduces the number of steps on the more complex assembly line.

[0035] The first cut has a cylindrical shape; therefore, the processing of the first cut is simple and quick.

[0036] The first component is the first mass block of the pendulum;

[0037] The first diameter of the first part of the rivet body is equal to the sixth diameter of the first cut of the first element + / - 0.05 mm;

[0038] The component also includes a second element having a second cut having a seventh diameter, the second diameter of a second portion of the rivet body being smaller than the seventh diameter; facilitating rivet insertion into the second cut formed in the second element;

[0039] The second cut has a cylindrical shape; therefore, the second cut is simple and quick to process.

[0040] The second diameter of the second part of the rivet body is + / - 0.2 mm smaller than the seventh diameter of the second cut;

[0041] The second component is the connecting member of the pendulum;

[0042] Rivets are suitable for mating a first element with a second element;

[0043] The assembly also includes a third element with a third cut having an eighth diameter, the eighth diameter being the same as the sixth diameter of the first cut in the first element; thus, it facilitates the insertion of a rivet into the third cut formed in the third element, and the cuts of the first and third elements are formed simultaneously to reduce manufacturing costs;

[0044] The first component is identical to the third component; therefore, the components are interchangeable, which reduces costs, limits the required number of references, and reduces errors during component assembly.

[0045] The third cut has a cylindrical shape; therefore, the third cut is simple and quick to process.

[0046] The third component is the second mass block of the pendulum;

[0047] The rivet is suitable for mating the first element and, optionally, the second element, with the third element.

[0048] Another subject of the present invention is a method for manufacturing a component according to the invention, comprising the following steps:

[0049] A first element is provided having a first cutout, the first cutout having a sixth diameter;

[0050] A rivet extending axially between a head and a foot is provided, the rivet comprising a body axially located between the head and the foot, the body comprising a first portion having a first diameter and a second portion having a second diameter smaller than the first diameter, the first diameter being equal to the sixth diameter;

[0051] The first element is paired with the rivet by inserting a first portion of the rivet body into a first notch in the first element.

[0052] The method according to the invention may further include one or more of the following optional steps:

[0053] Prior to the step of providing the first element, a first cut having a sixth diameter is made in the first element;

[0054] The first element is the first oscillating mass of the pendulum body of the pendulum damping device, which is particularly used in the transmission of vehicles.

[0055] Following the aforementioned steps, the method further includes the following steps:

[0056] A second element is provided having a second cut, the seventh diameter of which is smaller than the second diameter of the second part of the rivet body;

[0057] Insert the second part of the rivet body into the second cut;

[0058] A third element is provided with a third cut, the eighth diameter of which is the same as the sixth diameter of the first cut of the first element;

[0059] Insert the second part of the rivet body into the third cut;

[0060] The feet of the rivet are deformed to mate the first element with the second element and with the third element, thereby deforming the second part of the rivet body to fill the second and third cuts;

[0061] Alternatively, the following steps may be included prior to the aforementioned steps:

[0062] A third element is provided with a third cut, the eighth diameter of which is the same as the sixth diameter of the first cut of the first element;

[0063] Insert the second part of the rivet body into the third cut;

[0064] A second element is provided having a second cut, the seventh diameter of which is smaller than the second diameter of the second part of the rivet body;

[0065] Insert the second part of the rivet body into the second cut;

[0066] Then, after the preceding steps, the feet of the rivet are deformed to mate the first element with the second element and with the third element, and the second part of the rivet body is deformed to fill the second and third cuts.

[0067] The third element is the second oscillating mass block belonging to the pendulum body. The second element is a connecting member belonging to the pendulum body, which is suitable for pairing the first oscillating mass block with the second oscillating mass block.

[0068] Alternatively, the subject of this invention is a method for manufacturing a component according to the invention, comprising the following steps:

[0069] A first element is provided having a first cutout, the first cutout having a sixth diameter;

[0070] A rivet extending axially between a head and a foot is provided, the rivet comprising a body axially located between the head and the foot, the body comprising a first portion having a first diameter and a second portion having a second diameter smaller than the first diameter;

[0071] - The first element is paired with the rivet by inserting the first portion of the rivet body into the first notch of the first element;

[0072] A third element is provided with a third cut, the eighth diameter of which is the same as the sixth diameter of the first cut of the first element;

[0073] Insert the second part of the rivet body into the third cut;

[0074] The foot of the rivet is deformed to mate the first element with the third element, thereby deforming the second part of the rivet body to fill the third cut.

[0075] The method according to the invention may further include one or more of the following optional steps:

[0076] Between the third step and the preceding fourth step, the steps include:

[0077] A second element is provided having a second cut, the seventh diameter of which is smaller than the second diameter of the second part of the rivet body;

[0078] Insert the second part of the rivet body into the second cut;

[0079] The final step of deforming the rivet's foot includes deforming the rivet's foot to mate the first element with the second element and with the third element, thereby deforming the second part of the rivet's body to fill the second and third cuts.

[0080] Where the first diameter is equal to the sixth diameter;

[0081] The first element is the first oscillating mass of the pendulum damping device, and the third element is the second oscillating mass. The pendulum damping device is particularly used for equipping vehicle transmissions.

[0082] The second element is a connecting member belonging to the pendulum body, which is suitable for pairing the first oscillating mass block with the second oscillating mass block. Attached Figure Description

[0083] Other features and advantages of the invention will become more apparent from the following description and study of the accompanying drawings, in which:

[0084] Figure 1 A side view of the rivet according to the present invention is shown;

[0085] Figure 2 This is a perspective view of a rivet according to the present invention, including splines;

[0086] Figure 3 This is a schematic diagram of double rivets;

[0087] Figure 4 This is a schematic diagram of the rivet according to the first alternative solution;

[0088] Figure 5 This is a schematic diagram of the rivet according to the second alternative;

[0089] Figure 6 This is a partial cross-sectional view of a dual-mass flywheel including the rivets according to the present invention;

[0090] Figure 7 It is a perspective view of a pendulum damping device including the rivet according to the present invention;

[0091] Figure 8 This is a perspective view of the sub-assemblies suitable for forming the pendulum, showing the steps of assembling the first oscillating mass block with rivets;

[0092] Figure 9 It is along Figure 8 The side view of the cross section of the VV axis is shown;

[0093] Figure 10 and Figure 11 yes Figure 7 A partial front view of the pendulum damping device shown illustrates the steps for assembling the pendulum damping device;

[0094] Figure 12 It is along Figure 7 The cross-sectional side view of axis VIII-VIII shown has no rolling elements. Detailed Implementation

[0095] In the various figures, the same reference numerals are used to denote the same or similar components.

[0096] Definitions: Unless otherwise stated, “axial” means “the longitudinal axis U parallel to the rivet”; “radial” means “along a transverse axis intersecting the axis of rotation X of the support”; “angular” or “circumferential” means “about the axis of rotation of the support”.

[0097] The thickness is measured along the rotation axis X.

[0098] "Centrifugal support" means a support force that includes a component that is away from the axis of rotation X.

[0099] "Vehicle" should be understood as a motor vehicle, which includes not only passenger cars but also industrial vehicles, especially heavy-duty trucks, public transport vehicles or agricultural vehicles, as well as any transport unit capable of moving living things and / or objects from one point to another.

[0100] A "pendulum" should be understood as a mass block mounted in a manner that causes it to vibrate on a support in response to the non-cyclic behavior of a vehicle's engine. A pendulum typically consists of a pair of oscillating masses, or "pendulum masses," that extend in a manner clamping the support and are rigidly fixed to each other. The pendulum also includes at least one connecting member, also called a spacer, designed to pair the pair of oscillating masses. A pendulum can also consist of a single oscillating mass. A single oscillating mass can be clamped between two supports.

[0101] When two components are permanently fixed relative to each other, they are referred to as "rigid fixation" or "pairing". This fixation may result in the first component being fixed to the second component directly or via one or more intermediate components.

[0102] The rest position of the device is the position where the pendulum is subjected to centrifugal force but not to torsional oscillations caused by the non-cyclic behavior of the internal combustion engine.

[0103] When the rotational speed of the support is sufficient to cause the pendulum to press radially outward against the rolling member and then radially against the support member via the rolling member, the pendulum is said to be "supported by centrifugal force".

[0104] Unless otherwise stated, the verbs “include,” “have,” or “contain” should be interpreted broadly, that is, non-restrictively.

[0105] A value that is lower than or higher than another value is a value that is strictly lower than or higher than that other value.

[0106] like Figure 1 As shown, rivets 30 are particularly suitable for securing components together and ensuring optimal fixation between the components.

[0107] Rivet 30 can be solid or partially drilled.

[0108] The rivet 30 can extend along the longitudinal axis U between the head 31 and the foot 32. The rivet 30 can extend completely between the head 31 and the foot 32.

[0109] Alternatively, rivet 30 may include a second foot 32, such as Figure 3 As shown. The rivet 30 can extend completely between the two feet 32. The head 31 can be axially positioned between the two feet 32. Therefore, the same rivet 30 can securely fasten several component assemblies together.

[0110] The rivet 30 may also include a body 33 axially positioned between the head 31 and the foot 32, i.e., positioned along the longitudinal direction U. The body 33 may be divided into at least two parts, including a first part 34 and a second part 35.

[0111] The first part 34 can be axially positioned, i.e., positioned along the longitudinal direction U, to contact the head 31. Alternatively, the first part 34 can be axially positioned to contact the foot 32, for example, as shown below. Figure 4 As shown. The first portion 34 may be cylindrical. The first portion 34 may have a first diameter D1. The first diameter D1 may be continuous over the entire first portion 34. The first portion 34 may have a first axial length L1.

[0112] Alternatively, the body 33 can be divided into three parts; a single first part 34 and two second parts 35, as follows: Figure 5 As shown. The first part 34 can be axially positioned between the two second parts 35. The first part can axially contact the head 31, and the second part can axially contact the foot 32.

[0113] The first part 34 may include at least one spline 37. The at least one spline 37 may extend along the longitudinal direction u. The at least one spline 37 may have an axial length less than the first axial length L1 of the first part 34.

[0114] The formation of the spline 37 allows for localized deformation of the first portion 34 of the rivet 30 body 33 at the edge of the spline 37. These localized deformations can form grooves extending along the edge of the spline 37. These ribs allow for a localized increase in the diameter of the first portion 34. This localized increase in diameter allows for a reduction, preferably elimination, of the gap between the cuts into which the rivet 30 is inserted, while limiting the force required for insertion. The spline 37 can be machined. The machining of the spline allows for methods that do not require high precision, thus reducing costs.

[0115] The entire first portion 34 is included within the first diameter D1. That is, when the rivet 30 includes the spline 37, the top of the rib created by the manufacture of the spline 37 is included within the first diameter D1.

[0116] Preferably, the first portion 34 may include a plurality of splines 37. The splines 37 may be evenly distributed on the outer surface of the first portion 34.

[0117] The second portion 35 can be axially positioned, i.e., positioned along the longitudinal direction U, to contact the foot 32. Alternatively, the second portion 35 can be axially positioned to contact the head 31. The second portion 35 can be cylindrical. The second portion 35 can have a second diameter D2. The second diameter D2 can be continuous over the entire second portion 35. The second diameter D2 can be smaller than the first diameter D1. The second portion 35 can have a second axial length L2. The first axial length L1 can be smaller than the second axial length L2. The first axial length L1 can be at least twice as small as the second axial length L2, and preferably at least three times as small as the second axial length L2.

[0118] The second part 35 may include one or more splines 37.

[0119] The body 33 may further include an intermediate portion 36. The intermediate portion 36 may be axially positioned, i.e., positioned between the first portion 34 and the second portion 35 along a direction parallel to the longitudinal axis U. The intermediate portion 36 may have a third diameter D3. The third diameter D3 is smaller than the first diameter D1. The third diameter D3 is larger than the second diameter D2. The intermediate portion 36 may have a third axial length L3. The third axial length L3 may be smaller than the first axial length L1 and the second axial length L2. The third axial length L3 may be at least three times smaller than the first axial length L1.

[0120] The intermediate portion 36 can be cylindrical. The third diameter D3 can be continuous over the entire intermediate portion 36. Alternatively, the intermediate portion 36 can have the shape of a portion of a cone. The third diameter D3 can decrease over the entire intermediate portion 36.

[0121] The head 31 of the rivet 30 may be cylindrical. The head 31 may have a fourth diameter D4. The fourth diameter D4 may be larger than the first diameter D1.

[0122] Alternatively, the fourth diameter D4 of the head 31 can be equal to the first diameter D1, and the head 31 can coincide with the first part 34 of the body 33.

[0123] Alternatively, the fourth diameter D4 of the head 31 can be equal to the second diameter D2, and the head 31 can coincide with the second part 35 of the body 33.

[0124] The foot 32 may have a fifth diameter D5. The fifth diameter D5 may be less than or equal to the second diameter D2. The foot 32 of the rivet 30 may be cylindrical. The fifth diameter D5 may be continuous throughout the foot 32. Alternatively, the foot 32 may have the shape of part of a cone. The fifth diameter D5 may decrease throughout the foot 32.

[0125] Alternatively, the fifth diameter D5 of the foot 32 can be equal to the first diameter D1, and the foot 32 can coincide with the first part 34 of the body 33.

[0126] Alternatively, the fifth diameter D5 of the foot 32 can be equal to the second diameter D2, and the foot 32 can coincide with the second part 35 of the body 33.

[0127] The foot 32 can be adapted to deform in order to ultimately secure at least two elements of the assembly.

[0128] The aforementioned rivet 30 is the rivet before assembly. That is to say, it has not yet undergone any deformation to ensure its function as a fixing component.

[0129] The rivet 30 is adapted to fasten components belonging to an assembly together. The assembly may include at least two components, a first component and a second component. The assembly may include at least one third component. The first, second, and third components can be any components to be assembled together, such as plates. The rivet 30 itself may belong to this assembly.

[0130] The rivet 30 and the first element can form a sub-assembly 40.

[0131] This component can be classified as a symmetrical damper.

[0132] This component can be a dual-mass flywheel. In a known manner, the dual-mass flywheel 1 includes a primary flywheel 3. The primary flywheel 3 includes a flange fixed to a starter ring gear. The flange and the starter ring gear are fixed to each other at their radial outer circumferences to at least partially define an internal volume 5. A resilient reset member 9, such as a bent element like a coil spring, can be mounted within said internal volume 5.

[0133] The resilient reset member 9 extends circumferentially and is supported at a first end on a flange and / or a starter ring gear, and at a second end on a web plate 4 that may belong to the secondary flywheel 6.

[0134] The elastic reset member 9 allows for a limited range of rotational motion of the secondary flywheel 6 relative to the primary flywheel 3 around the axis of rotation. For example... Figure 6 As shown, the first element, the second element, and the third element can be selected from the primary flywheel 3, the web plate 4, and the secondary flywheel 6, respectively.

[0135] In the example described below, the component may be the pendulum body 13 of the pendulum damping device 10. The first element may be a first oscillating mass 14 belonging to the pendulum body 13. The second element may be a connecting member belonging to the pendulum body 13, and the third element may be a second oscillating mass 14 belonging to the pendulum body 13. The first portion 34 of the body 33 of the rivet 30 is in axial contact with the head 31, and the second portion 35 of the body 33 of the rivet 30 is in axial contact with the foot 32.

[0136] like Figure 7 As shown, the pendulum damping device 10, which is particularly suitable for equipping vehicle transmission systems, can be integrated into components of such transmission systems, such as dual-mass flywheels.

[0137] This component can form part of the vehicle's propulsion unit, which may include an internal combustion engine with a predetermined number of cylinders, such as three, four, or six cylinders.

[0138] The pendulum damping device 10 includes at least one pendulum body 13 mounted on a support member 12, which is rotatable about a rotation axis X. The device 10 preferably includes a plurality of pendulum bodies 13 mounted on the support member 12. Each pendulum body 13 includes at least one oscillating mass 14.

[0139] Preferably, each pendulum 13 includes first and second oscillating mass blocks 14, which are paired by at least one connecting member, generally referred to as a "spacer" 20. Each pendulum 13 may include a single spacer. Alternatively, each pendulum 13 may include two spacers 20.

[0140] Each spacer 20 can be riveted to the oscillating mass block 14 of the same pendulum 13 by at least one rivet 30. Thus, the rivet 30 is adapted to pair the spacer 20, the first oscillating mass block 14, and the second oscillating mass block 14 together.

[0141] Each spacer 20 may include a body that extends radially and circumferentially and has an overall arched shape. The body extends radially between a radially outer upper surface 21 and a radially inner lower surface 22. The body extends circumferentially between a first circumferential end and a second circumferential end.

[0142] The body of the spacer 20 may include at least one second cut 202. The second cut 202 is adapted for the passage of the rivet 30. The second cut 202 may be cylindrical. The second cut 202 may be a through cut. The second cut 202 may have a seventh diameter D7. The seventh diameter D7 may be continuous over the entire second cut 202. The seventh diameter D7 may be larger than the second diameter D2 of the second portion 35 of the rivet 30. The seventh diameter D7 may be larger than the second diameter D2 of the second portion 35 of the rivet 30 with a tolerance of 0.2 mm.

[0143] The body of the spacer 20 may include a plurality of second cuts 202. Each second cut 202 is adapted for the passage of a rivet 30. Preferably, when the pendulum 13 includes two spacers 20, the spacer 20 includes two second cuts 202, and when the pendulum 13 includes a single spacer, the spacer 20 includes four second cuts 202.

[0144] Each of the first and second oscillating mass blocks 14 includes a body that extends radially and circumferentially and has an overall arched shape. The oscillating mass blocks 14 are located on either side of the support 12 and are axially opposed to each other along a direction parallel to the rotation axis X of the support 12.

[0145] The main body of the first oscillating mass block 14 may include at least one first cut 141. The first cut 141 is adapted for the passage of the rivet 30. The first cut 141 may be cylindrical. The first cut 141 may be a through cut. The first cut 141 may have a sixth diameter D6. The sixth diameter D6 may be continuous over the entire first cut 141. The sixth diameter D6 may be equal to the first diameter D1 of the first portion 34 of the rivet 30. The sixth diameter D6 may be equal to the first diameter D1 of the first portion 34 of the rivet 30, with a tolerance of 0.05 mm.

[0146] The body of the first oscillating mass 14 may include a plurality of first cuts 141. Each first cut 141 is adapted for the passage of a rivet 30. Preferably, the first oscillating mass 14 includes as many first cuts 141 as the pendulum 13 includes rivets 30.

[0147] The main body of the second oscillating mass block 14 may include at least one third cut 143. The third cut 143 is adapted for the passage of the rivet 30. The third cut 143 may be cylindrical. The third cut 143 may be a through cut. The third cut 143 may have an eighth diameter D8. The eighth diameter D8 may be continuous over the entire third cut 143. The eighth diameter D8 may be the same as the sixth diameter D6 of the first oscillating mass block 14. The eighth diameter D8 may be larger than the second diameter D2 of the second portion 35 of the rivet 30.

[0148] The body of the second oscillating mass 14 may include a plurality of third cuts 143. Each third cut 143 is adapted for the passage of a rivet 30. Preferably, the second oscillating mass 14 includes as many third cuts 143 as the rivets 30 included in the pendulum 13.

[0149] The seventh diameter D7 of the second cut 202 of the spacer 20 can be the same as the sixth diameter D6 of the first cut 141 of the first oscillating mass block 14, and the same as the eighth diameter D8 of the third cut 143 of the second oscillating mass. Therefore, the same tooling makes it possible to produce the first, second, and third cuts.

[0150] The support 12 may be an input element, an output element, or an intermediate phasing element arranged between two series of springs of the torsional damper, or an element that is rotatably connected to one of the aforementioned elements but different from it, such as a support dedicated to device 10.

[0151] The support member 12 of the pendulum damping device 10 can be one of the following: a guide washer of the component, a phase ring of the component, or a support member different from the web, the guide washer and the phase ring.

[0152] If the device is contained in a flywheel that is fixed to the crankshaft, then the support can be fixed to the flywheel.

[0153] Support 12 can also be other support components, such as flanges.

[0154] In the example under consideration, the support 12 has an integral annular shape made of a cut metal sheet, typically steel, with a thickness typically less than 10 mm, preferably less than 6 mm, and more preferably less than 5 mm.

[0155] The support member 12 extends axially between two opposing lateral surfaces 16 along a direction parallel to the axis of rotation X. The two lateral surfaces 16 may be planar. The two lateral surfaces 16 may extend between a radially inner edge and a radially outer edge. The radially inner edge may typically be circular.

[0156] At least one hole 15 passes through the support member 12 in the thickness direction. Preferably, as many holes 15 as spacers 20 pass through the support member 12. Each hole 15 defines an open space inside the support member 12. The holes 15 may be evenly distributed over the entire circumference of the support member 12. Each spacer 20 may pass through the hole 15. Each spacer 20 may be completely accommodated within the thickness of the hole 15.

[0157] The device 10 also includes at least one rolling element 40, such as a roller. Each pendulum 13 is mounted in a conventional manner and is capable of oscillation on the support 12, for example by a single rolling element 40.

[0158] Preferably, each pendulum 13 is mounted via two rolling members 40 to oscillate on the support 12. The two rolling members 40 may pass through a single hole 15 in the support 12 and guide the movement of the oscillating mass 14 of the pendulum 13 relative to the support 12. Alternatively, each rolling member 40 may pass through a hole 15 in the support and guide the movement of the oscillating mass 14 relative to the support 12.

[0159] When the pendulum 13 is supported by centrifugal force, each rolling member 40 can roll along the support track 41 fixed to the support member 12. When the pendulum 13 is supported by centrifugal force, each rolling member 40 can roll along the pendulum track 42 fixed to the pendulum 13. The edge of the hole 15, particularly the radially outer side of the edge, can define the support track 41. When two rolling members 40 are in the same hole 15, the spacer 20 can form one or more pendulum track 42s. More specifically, the radially outer upper surface 21 of the spacer 20 can form one or more pendulum track 42s.

[0160] The shapes of the support track 41 and the pendulum track 42 can be such that each pendulum 13 translates relative to the support 12 about an imaginary axis parallel to the rotation axis X of the support 12, and also rotates about the center of gravity of the pendulum 13. This motion is also called "combined motion" and is disclosed, for example, in application DE 10 2011 086 532.

[0161] In one variation, the shapes of the aforementioned support members and pendulum track 41 and 42 can be such that each pendulum 13 translates only relative to the support member 12 about an imaginary axis of rotation X parallel to the support member 12.

[0162] Each rolling member 40 can be freely mounted in the hole 15 of the support member 12. Each rolling member 40 may have a rolling surface 43, which is designed to at least partially contact the support member track 41 and the pendulum track 42.

[0163] Each rolling element 40 may be compressed only between the pendulum track 42 and the support track 41. The pendulum track 42 and the support track 41, which cooperate with the same rolling element 40, may face each other at least partially radially, which means that there is a plane perpendicular to the axis of rotation X, and these track tracks extend in said plane.

[0164] Each rolling element 40 may cooperate with the pendulum track 42 and the support track 41 only via its outer rolling surface 43.

[0165] All pendulum track tracks 42 may have exactly the same shape as each other, and / or all support track tracks 41 may have exactly the same shape as each other.

[0166] The pendulum bodies 13 are preferably evenly distributed at an angle around the axis X. Preferably, there are two of them. The number may be less than four. All the pendulum bodies 13 may be circumferentially sequential. Therefore, the device 10 may include multiple planes perpendicular to the axis of rotation X, in which all the pendulum bodies 13 are arranged.

[0167] The device 10 also includes at least one stop damper 50. The stop damper 50 may be made of an elastic material. The elastic material may be an elastomer or rubber. The elastic properties exhibited by the stop damper 50 allow for the damping of impacts associated with the contact between the pendulum 13 and the support 12. The stop damper 50 may be located at one circumferential end of the spacer 20.

[0168] A method for manufacturing a pendulum damping device 10 may include the step of assembling first and second oscillating mass blocks 14 onto a support member 12.

[0169] The first and second oscillating mass blocks 14 of the pendulum 13 are typically made of metal sheets in a preparatory step. During this preparatory step, the (multiple) first cuts 141 and (multiple) third cuts 143 can be formed by stamping.

[0170] During the preparatory step, (multiple) second cuts 202 can also be formed by stamping in (multiple) spacers 20.

[0171] This preparatory step makes it easy to produce cylindrical cuts with a predetermined diameter. The first, second, and third cuts can have the same diameter and be produced by the same tools, which facilitates manufacturing and reduces manufacturing costs.

[0172] Including the first oscillating mass block 14, the second oscillating mass block 14, and as shown in the figure. Figure 10 The components of the two spacers 20 thus prepared in the example shown can be assembled onto the support 12 during the assembly step.

[0173] In the manufacturing method according to the present invention, such as Figure 8 and 9 As shown, the assembly step includes a first insertion sequence of inserting rivets 30 into each of the first slits 141 of the first element. Here, rivets 30 may be inserted into each of the first slits 141 of the first oscillating mass block 14. A first portion 34 of the body 33 of each rivet 30 may contact the inner wall of each of the first slits 141. The contact may be a contact with a small gap. The presence of a small gap is sufficient to allow a good connection between the first element and the rivet 30. Preferably, the contact has no gap. The outer surface of the first portion 34 of the body 33 of the rivet 30 may contact the inner wall of the first slit 141. Alternatively, when the rivet 30 includes one or more splines 37, the top of the ribs present on the edges of the one or more splines 37 may contact the inner wall of the first slit 141. Each first slit 141 is filled to a degree greater than 50%, preferably greater than 80%, which is the benchmark for the pendulum 13 to be firmly held and vibration-resistant in centrifugal action. The one or more rivets 30 and the first oscillating mass block 14 are rigidly connected together and form a sub-assembly. The first axial length L1 of the first part can be equal to the thickness of the first cut 141. The head 31 of each rivet 30 can contact the first oscillating mass block 14.

[0174] The assembly steps of the manufacturing method according to the invention may further include a second insertion sequence of inserting the support member 12. The sub-assembly is inserted into the support member 12. Figure 10 As shown, the first oscillating mass block 14 is in contact with one of the side surfaces 16 of the support member, and the rivet 30 passes through at least one hole 15 of the support member 12.

[0175] The assembly steps of the manufacturing method according to the invention may further include a third insertion sequence of the second element. The second element here is the spacer 20 on the rivet 30. The second portion 35 of the body 33 of each rivet 30 may be inserted with a gap into each of the second cuts 202 to facilitate the installation of the spacer 20.

[0176] During this third insertion sequence, a stop damper 50 may also be added to the spacer 20.

[0177] The second and third insertion orders can be interchanged.

[0178] The assembly steps of the manufacturing method according to the invention may further include a fourth insertion sequence of the rolling member 40. For example... Figure 10 As shown, each of the rolling members 40 is inserted into one of the holes 15 in the support member 12 between the support member track 41 and the pendulum track 42.

[0179] The assembly steps of the manufacturing method according to the invention may further include a fifth insertion sequence of a third element, wherein the third element is, in this case, the second oscillating mass block 14. Figure 11 As shown, the second part 35 of the body 33 of each 30 can be inserted into each third cut 143 with a gap to facilitate the installation of the second oscillating mass block 14.

[0180] like Figure 12 As shown, the manufacturing method includes the step of deforming the foot 32 of each rivet 30. This deformation allows the first and second oscillating mass blocks and the spacer 20 to be rigidly fixed to each other. This deformation allows the gap between the second portion 35 of the body 33 of each rivet 30 and the interior of the third cut 143 to be reduced. This reduction in gap allows a fill factor of more than 50%, preferably more than 80%, of each third cut 143 to be obtained through one of the rivets 30, which is a benchmark for stabilizing the pendulum 13 and resisting impact during centrifugal action.

[0181] Each step of the manufacturing process can be carried out cold.

[0182] According to an alternative in which the first portion 34 of the body 33 of the rivet 30 is in axial contact with the foot 32 and the second portion 35 of the body 33 of the rivet 30 is in axial contact with the head 31, the first element may be a second oscillating mass block 14 belonging to the pendulum 13, the second element may be a connecting member, and the third element may be the first oscillating mass block 14. Furthermore, the insertion steps of the manufacturing method follow each other as follows: fifth sequence, second sequence, third sequence, fourth sequence, and first sequence.

[0183] During the fifth sequence, the head 31 of each rivet 30 may contact the first oscillating mass block 14, and the second portion 35 of the body 33 of each rivet 30 may be inserted intermittently into each cut of the first oscillating mass block 14.

[0184] During the first sequence, the first portion 34 of the body 33 of each rivet 30 can contact the inner wall of each cut of the second mass block 14 with no gap or with a small gap.

[0185] According to the alternative, the first portion 34 of the body 33 of the rivet 30 is axially located between the two second portions 35 of the body 33 of the rivet 30. The first element can be a connecting member, the second element can be a first oscillating mass block 14, and the third element can be a second oscillating mass block 14. Furthermore, the insertion steps of the manufacturing method follow each other in the following order: third sequence, second sequence, first sequence, fourth sequence, and fifth sequence.

[0186] During the third sequence, the head 31 of each rivet 30 may contact the first oscillating mass block 14, and the first second portion 35 of the body 33 of each rivet 30 may be inserted intermittently into each cut of the first oscillating mass block 14.

[0187] During the first sequence, the first portion 34 of the body 33 of each rivet 30 can contact the inner wall of each cut of the spacer 20 with no gap or with a small gap.

[0188] During the fifth sequence, the second portion 35 of the body 33 of each rivet 30 can be inserted intermittently into each cut of the second oscillating mass block 14.

[0189] Of course, the present invention is not limited to the embodiments described and illustrated, which are for illustrative purposes only. Various embodiments may also be combined.

Claims

1. A component, said component comprising, prior to assembly: The first element has a first cut (141) having a sixth diameter (D6). The third element has a third cut (143) having an eighth diameter (D8), which is the same as the sixth diameter (D6) of the first cut (141) of the first element. A rivet (30) extends axially between a head (31) and a foot (32) and includes a body (33) axially located between the head and the foot. The body of the rivet includes a first portion (34) having a first diameter (D1) and a second portion (35) having a second diameter (D2) smaller than the first diameter (D1), wherein the first diameter (D1) of the first portion (34) of the rivet body (33) is equal to the sixth diameter (D6) of the first cut (141) of the first element.

2. The component according to claim 1, wherein, The head (31) of the rivet (30) has a fourth diameter (D4) that is greater than the first diameter (D1), and wherein the first portion (34) of the rivet (30) is in axial contact with the head (31), and the second portion (35) of the rivet (30) is in axial contact with the foot (32).

3. The component according to claim 1, wherein, The head (31) of the rivet (30) has a fourth diameter (D4) that is greater than the first diameter (D1), and wherein a first portion (34) of the rivet (30) is in axial contact with the foot (32), and a second portion (35) of the rivet (30) is in axial contact with the head (31).

4. The component according to claim 1, wherein, The body (33) of the rivet (30) includes two second parts (35), and the first part (34) of the rivet (30) is axially located between the two second parts (35).

5. The component according to any one of claims 1 to 4, wherein, The body (33) of the rivet (30) also includes an intermediate portion (36) axially located between a first portion (34) and a second portion (35) of the rivet (30), the intermediate portion (36) having a third diameter (D3) between the second diameter (D2) and the first diameter (D1).

6. The component according to any one of claims 1 to 4, wherein, The first part (34) of the body (33) of the rivet (30) includes a spline (37).

7. The component according to any one of claims 1 to 4 further includes a second element having a second cut (202) having a seventh diameter (D7), wherein the second diameter (D2) of the second portion (35) of the body (33) of the rivet (30) is smaller than the seventh diameter (D7).

8. The component according to any one of claims 1 to 4, wherein the component is a pendulum (13) for a pendulum damping device (10) for equipping a vehicle's transmission.

9. A method for manufacturing a component as described in any of the preceding claims, comprising the following steps: The first step is to provide a first element having a first cut (141) having a sixth diameter (D6). The second step is to provide a rivet (30) extending axially between a head (31) and a foot (32), the rivet including a body (33) axially located between the head and the foot, the body including a first portion (34) having a first diameter (D1) and a second portion (35) having a second diameter (D2) smaller than the first diameter (D1). The third step is to pair the first element with the rivet (30) by inserting the first part (34) of the rivet body into the first cut (141) of the first element; The fourth step is to provide a third element having a third cut (143) having an eighth diameter (D8) that is the same as the sixth diameter (D6) of the first cut (141) of the first element. The fifth step is to insert the second part (35) of the rivet body into the third cut (143). The sixth step is to deform the foot (32) of the rivet to mate the first element with the third element, and to deform the second part (35) of the rivet body to fill the third cut.

10. The method according to claim 9, wherein, The first diameter (D1) is equal to the sixth diameter (D6).

11. The method according to claim 9 or 10, wherein, The first element is the first oscillating mass block (14) of the pendulum body (13) of the pendulum damping device (10), and the third element is the second oscillating mass block (14) of the pendulum damping device (10), which is used to equip a vehicle's transmission.

12. The method of claim 11, further comprising the following step between the third step and the fourth step: A second element is provided having a second cut (202) having a seventh diameter (D7) smaller than the second diameter (D2) of the second portion (35) of the body (33) of the rivet (30). Insert the second part (35) of the rivet body into the second cut (202); The sixth step includes deforming the foot (32) of the rivet to mate the first element with the second element and with the third element, thereby deforming the second part (35) of the rivet body to fill the second cut and the third cut.

13. The method according to claim 12, wherein, The second element is a connecting member (20) belonging to the pendulum (13), which is adapted to pair the first oscillating mass block with the second oscillating mass block.

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