Torque transfer device for a powertrain of a motor vehicle

Abstract

This invention relates to a torque transmission device (1) for a powertrain of a motor vehicle, comprising: an input element (5) rotatable to the crankshaft of an internal combustion engine of the motor vehicle; a torque limiting device (3) immediately following the input element (5); and an output element (6) immediately following the input element (5), the output element being torsionally connected to the torque limiting device (3) by means of a form-fitting connection (13), wherein the output element (6) is connected to the torque limiting device (3) about the torque transmission device (1) in the axial direction (A) of the torque transmission device (1) by a loading mechanism (14), particularly a spring. The force is held in the first position (15) and can resist the force of the loading mechanism (14) to move in the axial direction (A), wherein the output element (6) can occupy the second position (16) during the movement in the axial direction (A), in which the form-fitting connection (13) is still present, and wherein the output element (6) can occupy the third position (17) during the movement in the axial direction (A), in which the form-fitting connection (13) is removed and the output element (6) is rotatable about the torque limiting device (3).

Description

Technical Field

[0001] This invention relates to a torque transmission device for a powertrain of a motor vehicle. Background Technology

[0002] A torque transmission device for a powertrain of a motor vehicle is known from DE 10 2019 120 220 A1, which has a torsional vibration damping device on the input side, a torque limiting device immediately thereafter, and a centrifugal pendulum device immediately thereafter, the input side of the centrifugal pendulum device being torsionally connected to the output side of the torque limiting device. Summary of the Invention

[0003] The purpose of this invention is to provide a torque transmission device for a powertrain of a motor vehicle that can be disassembled and subsequently reinstalled in a simple manner and method.

[0004] According to the present invention, the objective is achieved by a torque transmission device for a powertrain of a motor vehicle as described in claim 1. Preferred embodiments of the invention are detailed in the dependent claims.

[0005] The torque transmission device for a motor vehicle powertrain comprises: an input element that can be screwed onto the crankshaft of the motor vehicle's internal combustion engine; a torque limiting device immediately following the input element; and an output element immediately following the input element. The output element is torsionally connected to the torque limiting device by a form-fit connection. The output element is held in a first position relative to the torque limiting device along the axial direction of the torque transmission device by the force of a loading mechanism, particularly a spring, and can be displaced axially against the force of the loading mechanism. During this axial displacement, the output element can occupy a second position, in which a form-fit connection is also formed. Furthermore, during this axial displacement, the output element can occupy a third position, in which the form-fit connection is disengaged, and the output element is rotatable relative to the torque limiting device. Thus, especially during the operation of the motor vehicle, the crankshaft screwing part becomes accessible after the torque peak has been triggered, which benefits the removability and subsequent reinstallation of the torque transmission device.

[0006] Preferably, the input element includes a torsional vibration damping device, particularly an arc-shaped spring damper, the input flange of which is screw-on or screw-off to the crankshaft of the internal combustion engine, and the output flange of which forms the input side of the torque limiting device. In particular, the torsional vibration damping device, preferably with its arc-shaped spring, is disposed outside the torque limiting device along the radial direction of the torque transmission device, wherein the torsional vibration damping device and the torque limiting device preferably overlap in the axial direction.

[0007] The output element, which is torsionally connected to the torque limiting device by means of a form-fitting connection, preferably includes a hub, which is torsionally connected to the output shaft. The output shaft can be an intermediate shaft of a hybrid powertrain or a transmission input shaft of a motor vehicle. Preferably, the torsionally connected connection is achieved by means of interlocking teeth. In this regard, the hub is preferably configured to have internal teeth extending inward in the radial direction.

[0008] Furthermore, it is advantageous to provide a torsional vibration damping device at the output element, particularly for centrifugal pendulum devices. Preferably, at least one first centrifugal pendulum flange is connected to the hub. Preferably, the centrifugal pendulum device is a so-called double-flange pendulum, wherein pendulum blocks distributed circumferentially are pivotally mounted axially between two centrifugal pendulum flanges spaced apart by spacer bolts via rollers. The first centrifugal pendulum flange is torsionally connected to the hub, preferably riveted, while the second centrifugal pendulum flange is torsionally connected to the first centrifugal pendulum flange by spacer bolts, preferably riveted.

[0009] However, it is also feasible to use a centrifugal pendulum device that is a so-called single-flange pendulum, in which pairs of pendulum blocks arranged circumferentially are positioned on both sides of a single central centrifugal pendulum flange in the axial direction. The first block of the pendulum block pair is positioned on the side of the centrifugal pendulum flange facing the input side of the torque transmission device, while the second block of the pendulum block pair is positioned on the side of the centrifugal pendulum flange facing the output side of the torque transmission device.

[0010] Preferably, the output element has at least one screw-through opening, which is aligned with a corresponding screw-through opening in the input element for screwing the input element to the crankshaft of the internal combustion engine. This makes the crankshaft screwing section accessible, especially during the operation of the torque limiting device in the motor vehicle after the torque peak has been triggered, which benefits the removability and subsequent installation of the torque transmission device.

[0011] Preferably, the input flange of the torsional vibration damping device has screw openings distributed along the circumferential direction, through which the input flange can be screwed to the crankshaft of the internal combustion engine.

[0012] Similarly, the output element, preferably the hub, has screw-through openings arranged in the same radius and in the same number along the circumferential direction, the screw-through openings being aligned with the screw-through openings for mounting the torque transmission device at the crankshaft. Preferably, the diameter of the screw-through opening corresponds at least to the diameter of the screw-through opening it aligns with, and is particularly larger than, the diameter of the screw-through opening it aligns with.

[0013] Preferably, the torque limiting device is configured as a slipper clutch. This makes the crankshaft turning part accessible, especially during vehicle operation, after the torque peak has been triggered, which benefits the removability and subsequent installation of the torque transmission device.

[0014] Preferably, the torque limiting device is a slip clutch, which has a counter-pressure plate fixed in position along the axial direction and a pressure plate loaded along the axial direction by a spring.

[0015] Preferably, the output flange of the torsional vibration damping device is frictionally clamped between the counter-pressure plate and the pressure plate of the sliding clutch in the axial direction, with the friction bushings inserted. Advantageously, a substantially annular friction bushing is fixed at least circumferentially to the counter-pressure plate, and another substantially annular friction bushing is fixed at least circumferentially to the pressure plate. Furthermore, the sliding clutch preferably has a side plate that is torsionally and axially fixedly connected to the counter-pressure plate and torsionally connected to the pressure plate. The pressure plate is disposed axially between the counter-pressure plate and the side plate. A disc spring supports the side plate so that the pressure plate is loaded onto the output flange of the torsional vibration damping device toward the counter-pressure plate. The aforementioned plates are preferably constructed as sheet metal parts.

[0016] Furthermore, it is advantageous that the input flange of the torsional vibration damping device has a centering device, by which the torque limiting device is centered and supported, in particular, supported. Preferably, the annular counter-pressure plate of the sliding clutch is supported by its inner edge at the centering device, which protrudes axially from the input flange. Preferably, the centering device is torsionally formed at the input flange and, in particular, has a screw-in opening that aligns with the screw-in opening of the input flange.

[0017] Preferably, the connection is configured as a toothed joint, which allows for the axial displacement of the output element relative to the torque limiting device and is positioned between the torque limiting device and the output element. This facilitates the accessibility of the crankshaft turning section, especially after the torque peak has been triggered during vehicle operation, thus improving the detachability and subsequent reinstallability of the torque transmission device.

[0018] It is important to note that the form fit must exist at least circumferentially to enable torque transmission, and is preferably formed by corresponding teeth or tooth surfaces of the interlocking teeth. That is, the form fit connection between the torque limiting device and the output element is at least torsional. Preferably, an annular pressure plate extending radially inward beyond the side plate to which it is connected restricts possible displacement of the output element in the axial direction, more precisely, in the direction toward the input side of the torque limiting device, in such a way that the output element rests against the pressure plate. This resting defines a first position of the output element.

[0019] Advantageously, the spring is supported at a support ring that is torsionally connected to the output side of the torque limiting device and pre-tightened to the flange section of the output element, wherein the flange section preferably has external teeth with interlocking teeth on its outer circumference. Thus, especially during the operation of the motor vehicle, the crankshaft turning part becomes accessible after the torque peak has been triggered, which benefits the removability and subsequent installation of the torque transmission device.

[0020] The flange section is preferably the radially outer portion of the hub. External teeth at the outer circumference of the flange section engage with corresponding internal teeth, which are preferably formed at the inner circumference of the annular side plate of the sliding clutch. It should be noted that, at least in the region of the interlocking teeth, the axial thickness of the flange section is preferably greater than the axial thickness of the side plate. Furthermore, it should be noted that, in the region of the interlocking teeth, the axial thickness of the flange section is preferably less than the total axial thickness of the side plate and the support ring. With this preferred design, it is feasible that, in the second position of the output element, when the output element is no longer abutting against the counter-pressure plate, a form-fit connection is created between the torque limiting device and the flange section of the output element or hub.

[0021] Preferably, the spring used to hold the output element in the first position along the axial direction with respect to the torque limiting device is configured as a disc spring. This makes the crankshaft turning part accessible, especially during the operation of the motor vehicle after the torque peak has been triggered, which benefits the detachability and subsequent reinstallation of the torque transmission device.

[0022] The disc spring preferably rests against the flange section of the hub in its inner region and against the support ring in its outer region. In the first position of the output element, the disc spring preferably has a tapered shape, while in the second position of the output element it is flat and preferably rests planarly on the surface of the flange section of the hub pointing towards the output side of the torque transmission device in its inner region.

[0023] Advantageously, the disc spring can rotate to a limited extent about the torque limiting device along the circumferential direction of the torque transmission device, preferably held to a limited extent by a support ring. This, especially during the operation of the motor vehicle, makes the crankshaft turning portion accessible after the torque peak has been triggered, which benefits the removability and subsequent reinstallation of the torque transmission device.

[0024] Preferably, the disc spring forms a spring-loaded bayonet-type connection. This prevents the circumferential or torsionally resistant connection between the torque limiting device and the output element from being maintained in the axial direction solely by the force of the disc spring in a pre-tightened sense. More precisely, the bayonet-type connection also ensures an axial form fit in the second position of the output element, which prevents the torsionally resistant connection between the torque limiting device and the output element from being disengaged without additional measures.

[0025] Preferably, the disc spring spatially restricts the axial movement of the output element in the second position from the initial position, and releases this spatial restriction in a rotational position about the initial position, allowing the output element to be axially moved to the third position. This is particularly beneficial in the torque limiting device during vehicle operation, as the crankshaft turning section becomes accessible after the torque peak has been triggered, thus improving the detachability and subsequent reinstallability of the torque transmission device.

[0026] The space constraint corresponds to the shape fit along the axial direction, in such a way that a flat, compressed disc spring preferably prevents the flange section of the hub from moving further away from the counter-pressure plate.

[0027] Advantageously, the disc spring, preferably having a long disc spring tongue and a short disc spring tongue in its outer circumference, wherein the disc spring is supported at the support ring not only in the initial position but also in the rotating position by its long disc spring tongue, and wherein the disc spring is supported at the support ring in the initial position by its short disc spring tongue, preferably at a protrusion extending inward in the radial direction of the support ring, in order to limit the axial displacement of the disc spring, thus spatially restricting the displacement of the output element from the second position, and wherein the short disc spring tongue is no longer supported at the support ring in the rotating position of the disc spring, preferably no longer at the protrusion extending inward in the radial direction, so that the axial displacement of the disc spring can be realized, thus spatially releasing the displacement of the output element to the third position. Therefore, especially in the operation of the motor vehicle, since the torque limiting device makes the crankshaft turning part accessible after the torque peak has been triggered, this is beneficial to the disassembly and subsequent installation of the torque transmission device.

[0028] In the third position, the disc spring remains flat and compressed, and additionally, along with the flange section of the hub, moves axially slightly further away from the input side of the torque transmission device than in the second position, or the disc spring—compared to the first position—has a conical shape. In both cases, the engagement of the teeth, preferably formed by the internal teeth on the inner circumference of the annular side plate of the slip clutch and the external teeth on the outer circumference of the flange section of the hub, can be disengaged.

[0029] Furthermore, it is advantageous to provide a centrifugal pendulum device at the output element, the centrifugal pendulum device having at least one first centrifugal pendulum flange, wherein the first centrifugal pendulum flange has an opening in the radius of the disc spring, preferably in the form of an elongated hole, through which a tool for rotating the disc spring can be introduced. Thus, especially in the case of torque limiting devices during the operation of motor vehicles, the crankshaft turning section becomes accessible after the torque peak has been triggered, which benefits the removability and subsequent reinstallation of the torque transmission device.

[0030] Preferably, it is feasible to rotate the disc spring by means of its long or short disc spring tongue.

[0031] Furthermore, the centrifugal pendulum device is preferably configured to include: at least one first centrifugal pendulum flange rotatable about a rotation axis; at least one pendulum block movably suspended from the first centrifugal pendulum flange to suppress rotational unevenness; and at least one hub torsionally connect to the first centrifugal pendulum flange, wherein the hub has a connecting section disposed about the rotation axis in a radius region that overlaps with the radius region where the pendulum block is disposed, and the radius region is configured for connection to a torque transmission device, and wherein the first centrifugal pendulum flange has a first tool-through opening formed in the radius region of the connecting section within the first centrifugal pendulum flange. This ensures accessibility to the connecting section through the centrifugal pendulum flange, which benefits the installability and detachability of the centrifugal pendulum device.

[0032] The connecting section can be constructed as a single piece with the hub, or it can be constructed as a separate component. Its spatial relationship with the hub is ultimately determined during preparation for connection with the torque transmission device or during the actual connection process.

[0033] The hub and output shaft can be connected in a torsion-resistant manner. The output shaft can be an intermediate shaft of a hybrid powertrain or a transmission input shaft. Preferably, the torsion-resistant connection is achieved by means of interlocking teeth. In this regard, the hub is preferably configured to have internal teeth extending inward in the radial direction of the centrifugal pendulum device.

[0034] Preferably, the centrifugal pendulum flange has an additional centering opening that can be used for orientation of the centrifugal pendulum device during installation.

[0035] Preferably, the connecting section has a connecting opening aligned with the first tool through opening along the axial direction of the centrifugal pendulum device. This ensures accessibility of the connecting section through the centrifugal pendulum flange, which benefits the installability and detachability of the centrifugal pendulum device.

[0036] In this context, alignment means that a tool, such as a screwdriver or riveting tool, can be inserted into the first tool through opening, and by means of this tool, the connecting mechanism can be introduced into or connected to a torque transmission device during installation, for example, by screwing or riveting. This means that the first tool through opening is generally larger than the connecting opening. In particular, alignment therefore means that, viewed along the axial direction of the centrifugal pendulum device, the connecting opening is completely within the edge of the first tool through opening. Thus, for example, it is possible for two connecting openings to be within and aligned with the edge of a single first tool through opening.

[0037] The outlines or geometries of the two openings can be different. Preferably, the connecting opening is circular, while the first tool-through opening has at least a circular outline, and is particularly circular. In particular, it is advantageous that the first tool-through opening has an imaginary or interpolated diameter, which is configured to be at least 11 mm larger than the diameter of the connecting opening.

[0038] Advantageously, the connecting section is configured as a support ring that is not fixedly connected to the hub. When the centrifugal pendulum device is implemented using a torque transmission device, the connecting opening of the connecting section is aligned axially with the through opening of the first tool. This ensures accessibility of the connecting section through the centrifugal pendulum flange, which is beneficial to the installability of the centrifugal pendulum.

[0039] For example, the support ring can be loosely, especially rotatably, pushed onto the hub or centered by the hub. Similarly, the support ring can be indirectly, force-fitted, oriented about the hub by another component, such as a disc spring, so that the support ring can still rotate about the hub when ready to be connected to a torque transmission device. Preferably, there is no form-fitting or material-fitting connection to the hub. The support ring can have a support section offset from the connection opening in the axial direction, said support section for supporting the disc spring in the axial direction. The support section can have a radially inwardly projecting protrusion, especially for forming a bayonet connection with the disc spring.

[0040] Preferably, the connection opening is manufactured using a stamping technique, and preferably, a stamped recess is formed on the side facing the remaining pre-installed torque transmission device or on the side away from the first centrifugal pendulum flange during installation. The stamped recess simplifies the introduction of the connection mechanism from the direction of the torque transmission device, which benefits the installability of the centrifugal pendulum device.

[0041] Correspondingly, a stamped ridge is preferably formed on the side facing the first centrifugal swing flange. The support ring is preferably a sheet metal component, while the hub is preferably a forged or sheet metal component.

[0042] Preferably, the pendulum block at least partially covers the first tool through opening when its center of gravity shifts inward along the radial direction of the centrifugal pendulum device. Conversely, it is advantageous that the tool through opening is open when the center of gravity of the pendulum block shifts outward to the maximum extent in the radial direction, which is beneficial to the installability and detachability of the centrifugal pendulum device.

[0043] Preferably, multiple tool through-openings are arranged in the first centrifugal pendulum flange in a manner that is distributed along the circumferential direction of the centrifugal pendulum device, preferably at the same radius and / or evenly spaced, which is beneficial to the installability and removability of the centrifugal pendulum device.

[0044] Particularly advantageous is that the first tool through-holes are respectively arranged circumferentially between two adjacent pendulum blocks. Particularly advantageous is that the three pendulum blocks are suspended at the first centrifugal pendulum flange, and the pendulum blocks are evenly distributed circumferentially, i.e., staggered from each other at 120°.

[0045] Advantageously, the second centrifugal pendulum flange is arranged parallel to and offset from the first centrifugal pendulum flange, wherein the second centrifugal pendulum flange has a second tool through opening aligned with the first tool through opening along the axial direction of the centrifugal pendulum device, and wherein the pendulum block is movably suspended between the two centrifugal pendulum flanges. The aligned tool through openings facilitate the installability and detachability of the centrifugal pendulum device.

[0046] The above description of the first tool through opening also applies to the second tool through opening. Preferably, the first centrifugal pendulum flange has breakage protection for the pendulum block on its outer circumference, while the second centrifugal pendulum flange has balancing capability on its outer circumference, preferably having balancing holes and balancing rivets introduced therein if necessary, so as to balance the centrifugal pendulum device independently of the remaining torque transmission equipment.

[0047] Preferably, the second centrifugal pendulum flange is torsionally engaged with the first centrifugal pendulum flange. This ensures accessibility to the connection section through the centrifugal pendulum flange, which benefits the installability and removability of the centrifugal pendulum device.

[0048] Advantageously, the first centrifugal pendulum flange is connected to the second centrifugal pendulum flange using spacer bolts, preferably in the area where the tool passes through the opening. This ensures accessibility of the connection section through the centrifugal pendulum flanges, which benefits the installability and disassembly of the centrifugal pendulum device.

[0049] Preferably, the spacer bolts form stops to limit the vibration angle of the pendulum blocks. This ensures accessibility to the connection section through the centrifugal pendulum flange, which benefits the installability and removability of the centrifugal pendulum device.

[0050] Furthermore, the torque transmission device for a powertrain in a motor vehicle is configured to have a torsional vibration damping device on the input side, followed by a torque limiting device, and then a centrifugal pendulum device according to one of the above embodiments. The connecting section of the centrifugal pendulum device is torsionally connected to the output side of the torque limiting device, preferably by means of a support ring rivet introduced into the connecting opening of the support ring. This ensures accessibility of the connecting section through the centrifugal pendulum flange, which is beneficial to the installability and removability of the centrifugal pendulum device. Attached Figure Description

[0051] The present invention will now be described in detail with reference to preferred embodiments and the accompanying drawings. The drawings show:

[0052] Figure 1 A perspective view of one embodiment of the torque transmission device is shown, wherein the centrifugal pendulum device is not installed or is disassembled;

[0053] Figure 2 A half-sectional view of a torque transmission device with a mounted centrifugal pendulum is shown;

[0054] Figure 3 A top view of a centrifugal pendulum device without a support ring is shown in the upper region having a second centrifugal pendulum flange and in the lower region without a second centrifugal pendulum flange.

[0055] Figure 4 A top view of a centrifugal pendulum device having a support ring and a torque limiting device connected thereto on the input side is shown;

[0056] Figure 5a A half-sectional view of a torque transmission device with a mounted centrifugal pendulum is shown, with its output element in a first position;

[0057] Figure 5b A detailed diagram of a torque transmission device with a mounted centrifugal pendulum is shown, with its output element in the second position;

[0058] Figure 5c A half-sectional view of a torque transmission device with a mounted centrifugal pendulum is shown, with its output element in a second position;

[0059] Figure 5d A top view of a torque transmission device with a mounted centrifugal pendulum is shown, with its disc spring in the initial position;

[0060] Figure 6a A partial sectional view of a torque transmission device with a mounted centrifugal pendulum is shown, its output element in a first position, in conjunction with... Figure 5a same;

[0061] Figure 6bA detailed diagram of a torque transmission device with a mounted centrifugal pendulum is shown, with its output element in the third position;

[0062] Figure 6c A half-sectional view of a torque transmission device with a mounted centrifugal pendulum is shown, with its output element in the third position;

[0063] Figure 6d A top view of a torque transmission device with a mounted centrifugal pendulum is shown, with its disc spring in a rotating position;

[0064] Figure 7a A top view of a torque transmission device with a mounted centrifugal pendulum is shown;

[0065] Figure 7b This shows a disc spring in the initial position. Figure 7a Detailed images in the middle, and

[0066] Figure 7c This shows a disc spring in a rotating position. Figure 7a Detailed images from the video. Detailed Implementation

[0067] exist Figures 1 to 7c The diagram illustrates an embodiment of a centrifugal pendulum device 4 for a torque transmission device 1, and an embodiment of a torque transmission device 1 for a motor vehicle powertrain, comprising a torsional vibration damping device 2, a torque limiting device 3, and a centrifugal pendulum device 4. Features not described in the following description as essential to the invention should be understood as optional.

[0068] exist Figures 1 to 7c The diagram illustrates an embodiment of a torque transmission device 1, specifically the centrifugal pendulum device 4, for use in a torque transmission device 1, and an embodiment of a torque transmission device 1 for use in a motor vehicle powertrain, comprising a torsional vibration damping device 2, a torque limiting device 3, and a torsional vibration buffering device. Features not described in the following description as essential to the invention should be understood as optional.

[0069] The torque transmission device 1 has an input element 5, which can be screwed onto or to the crankshaft of an internal combustion engine in a motor vehicle. Furthermore, the torque transmission device 1 has an output element 6, which can be torsionally connected to or to an output shaft. The output shaft can be an intermediate shaft of a hybrid powertrain in a motor vehicle or a transmission input shaft.

[0070] In the illustrated embodiment, the input element 5 includes a torsional vibration damping device 2, which is particularly configured as an arc-shaped spring damper, with its input flange 7 screwable or rotatable to the crankshaft of the internal combustion engine. The output flange 8 of the torsional vibration damping device 2 forms the input side 39 of the torque limiting device 3. In particular, the torsional vibration damping device 2, preferably with its arc-shaped spring 11, is disposed outside the torque limiting device 3 along the radial direction R of the torque transmission device 1, wherein the torsional vibration damping device 2 and the torque limiting device 3 preferably overlap along the axial direction A of the torque transmission device 1. The arc-shaped spring 11 is preferably guided in a sliding sleeve in a spring channel 10, which is formed by the input flange 7 and the cover plate 12. Furthermore, a centering device 9 is provided at the input flange 7, by which the torque limiting device 3 is centered and supported, in particular supported.

[0071] Output element 6 is torsionally connected to torque limiting device 3 by means of form-fitting connection 13, wherein output element 6 is held in a first position 15 about torque limiting device 3 in the axial direction A by force of loading mechanism 14, particularly spring force, as this is especially true in Figure 2 , 5a As shown in 6a, and the force resisting the loading mechanism 14 can be shifted in the axial direction A, as is particularly true in Figure 5b , 5c As shown in 6b and 6c. Output element 6 is capable of occupying a second position 16 during displacement in the axial direction A, the second position being... Figure 5b and 5b As shown, a form-fitting connection 13 is further formed in the second position. Furthermore, the output element 6 is capable of occupying a third position 17 during displacement in the axial direction A, the third position being... Figure 6b and 6c As shown, in the third position, the form-fitting connection 13 is removed and the output element 6 is rotatable about the torque limiting device 3.

[0072] The output element 6 includes a hub 23 that can be torsionally connected to or to the output shaft. In the illustrated embodiment, the torsionally connected connection is achieved by means of interlocking teeth. For this purpose, the hub 23 is configured to have internal teeth 32 extending inwardly in the radial direction R.

[0073] The first centrifugal pendulum flange 37 of the centrifugal pendulum device 4 is torsionally connected to the hub 23. In the illustrated embodiment, the centrifugal pendulum device 4 is a so-called double-flange pendulum, wherein the pendulum blocks 41, distributed along the circumferential direction of the torque transmission device 1, are pivotally mounted along the axial direction A between two centrifugal pendulum flanges 37, 38 spaced apart from each other by spacer bolts 42 via rollers. The first centrifugal pendulum flange 37 is torsionally connected to the hub 23, preferably riveted, while the second centrifugal pendulum flange 38 is torsionally connected to the first centrifugal pendulum flange 37 by spacer bolts 42, preferably riveted.

[0074] The output element 6 has at least one screw-through opening 35, which is aligned with a corresponding screw-through opening 34 in the input element 5 for screwing the input element 5 to the crankshaft of the internal combustion engine. Specifically, the input flange 7 of the torsional vibration damping device 2 has screw-through openings 34 distributed along the circumferential direction U, through which the input flange 7 can be screwed to the crankshaft of the internal combustion engine. Similarly, the output element 6, particularly the hub 23, has screw-through openings 35 distributed along the circumferential direction U in the same radius and in the same number, which are aligned with the screw-through openings 34 for mounting the torque transmission device 1 at the crankshaft. Preferably, the diameter of the screw-through opening 35 corresponds at least to the diameter of the screw-through opening 34 aligned with it and is particularly larger than the diameter of the screw-through opening 34 aligned with it.

[0075] In the illustrated embodiment, the torque limiting device 3 is a slip clutch having a counter-pressure plate 18 fixed at a position along the axial direction A and a pressure plate 19 loaded along the axial direction A by a disc spring 21. The output flange 8 of the torsional vibration damping device 2 is frictionally clamped between the counter-pressure plate 18 and the pressure plate 19 of the slip clutch along the axial direction A, respectively, with the friction bushings 22 inserted. One of the substantially annular friction bushings 22 is fixed at least circumferentially to the counter-pressure plate 18, and the other substantially annular friction bushing is fixed at least circumferentially to the pressure plate 19.

[0076] Furthermore, the sliding clutch has a side plate 20, which is torsionally and fixedly connected to the counter-pressure plate 18 along the axial direction A, and the side plate is torsionally connected to the pressure plate 19. The pressure plate 19 is disposed between the counter-pressure plate 18 and the side plate 20 along the axial direction A. A disc spring 21 is supported at the side plate 20 to load the pressure plate 19 toward the counter-pressure plate 18 onto the output flange 8 of the torsional vibration damping device 2. The aforementioned plates 18, 19, and 20 are preferably configured as sheet metal parts.

[0077] In the illustrated embodiment, the annular counter-pressure plate 18 of the sliding clutch is supported by its inner edge at a centering device 9 protruding from the input flange 7 in the axial direction A. The centering device 9 is torsionally formed at the input flange 7 and, in particular, has a screw opening 34 that aligns with the screw opening 34 of the input flange 7.

[0078] The form-fitting connection 13 is configured as a toothed joint, which allows the output element 6 to be axially displaced with respect to the torque limiting device 3 and positioned between the torque limiting device 3 and the output element 6. It is important to note that the form fit must exist at least in the circumferential direction U to enable torque transmission, and is preferably formed by corresponding teeth or tooth surfaces of the toothed joint. That is, the form-fitting connection 13 between the torque limiting device 3 and the output element 6 is at least torsional.

[0079] In the illustrated embodiments, such as particularly from Figure 2 , 5a As seen in 6a, an annular counter-pressure plate 18, extending radially inward beyond the side plate 20 to which it is connected, restricts the possible displacement of the output element 6 in the axial direction A to the left, more precisely towards the input side 39 of the torque transmission device 3, in such a way that the output element 6 rests against the counter-pressure plate 18. This resting defines a first position 15 for the output element 6.

[0080] A spring is supported at a support ring 24 that is torsionally connected to the output side 40 of the torque limiting device 3 and pre-tightened to the flange section 27 of the output element 6. The flange section 27 has an external toothed portion 26 with interlocking teeth on its outer circumference. The flange section 27 is particularly the section of the hub 23 located radially outward. The external toothed portion 26 on the outer circumference of the flange section 27 engages with a corresponding internal toothed portion 25 formed on the inner circumference of the annular side plate 20 of the slip clutch.

[0081] It should be noted that, at least in the area of ​​the interlocking teeth, the thickness of the flange section 27 along the axial direction A is preferably greater than the thickness of the side plate 20 along the axial direction A. Furthermore, it should be noted that, in the area of ​​the interlocking teeth, the thickness of the flange section 27 along the axial direction A is preferably less than the total thickness of the side plate 20 and the support ring 24 along the axial direction A. With the aforementioned design, it is feasible that, in the second position 16 of the output element 6, when the output element 6 is no longer abutting against the counter-pressure plate 18 (see...), Figure 5c In addition, there is a form-fitting connection 13 between the torque limiting device 3 and the flange section 27 of the output element 6 or hub 23.

[0082] The spring used to hold the output element 6 in the first position 15 along the axial direction A with respect to the torque limiting device 3 is configured as a disc spring 28. The disc spring 28 rests against the flange section 27 of the hub 23 in its inner region and against the support ring 24 in its outer region. In the first position 15 of the output element 6, the disc spring 28 preferably has a tapered shape (see...). Figure 5a and 6a It is flat in the second position 16 of the output element 6, and is especially planar in its internal region positioned on the flange section 27 of the hub 23 toward the output side 40 of the torque transmission device 1. Figure 5c On the surface to the right.

[0083] The disc spring 28 is held in a limited rotatable manner with respect to the torque limiting device 3 by the support ring 24 along the circumferential direction U. In particular, the disc spring 28 forms a preloaded bayonet-type connection. This prevents the circumferential or torsional fit between the torque limiting device 3 and the output element 6 from being maintained in the axial direction A solely by the force of the disc spring 28 in a pre-tightened sense. More precisely, the bayonet-type connection is also used for the axial fit in the second position 16 of the output element 6 (see...). Figure 5b and 5c This prevents the anti-torsional connection between the torque limiting device 3 and the output element 6 from being removed without additional measures.

[0084] Disc spring 28 in Figure 5d The starting position shown in the diagram spatially restricts the displacement of the output element 6 in the second position 16 along the axial direction A. This spatial restriction corresponds to a form fit along the axial direction A, wherein a flat, compressed disc spring 28 prevents the flange section 27 of the hub 23 from... Figure 5c Move further to the right away from the counter-pressure plate 18. In the rotational position about the starting position, the disc spring 28 releases the space constraint and enables the output element 6 to be moved along the axial direction A to the third position (see...). Figure 6b and 6c The rotation position is at Figure 6d Shown in and from Figure 5d This is achieved by rotating in the direction of the arrow.

[0085] The disc spring 28 has a long disc spring tongue 29 and a short disc spring tongue 30 in its outer circumference. The disc spring 28 is supported at the support ring 24 by its long disc spring tongue 29 not only in the initial position but also in the rotating position. The disc spring 28 is supported at the support ring 24 in its initial position by its short disc spring tongue 30, particularly at the radially inwardly extending protrusion 33 of the support ring 24, in order to limit the displacement of the disc spring 28 in the axial direction A, thereby spatially restricting the displacement of the output element 6 from the second position 16 (see...). Figure 5b and 5c The short disc spring tongue 29 is supported in the rotational position of the disc spring 28 no longer at the support ring 24, but particularly at the protrusion 33 extending inward in the radial direction R, so as to enable the displacement of the disc spring 28 in the axial direction A, thereby spatially releasing the output element 6 to the third position 17 (see...). Figure 6b and 6c Thus, the centrifugal pendulum device 4 can rotate with respect to the remaining torque transmission device 1 until the screw opening 34 and screw through opening 35, which were no longer aligned during the operation of the motor vehicle, are aligned again by the triggering of the torque limiting device 3. Thus, the crankshaft screw can be loosened by means of the corresponding tool and the complex torque transmission device 1 can be removed from the crankshaft.

[0086] In the illustrated embodiment, the output element 6, or centrifugal pendulum device 4, which is moved to the third position 17, is centered via its inner edge, preferably via a support section protruding in the axial direction A, by means of a support ring 24 riveted to the counter-pressure plate 18 and the side plate 20 by means of a support ring rivet 31. This support section also serves to support the disc spring 28 in the axial direction A.

[0087] In the third position 17, the disc spring 28 remains flat and compressed, and additionally, along with the flange section 27 of the hub 23, moves slightly further away from the input side 39 of the torque transmission device 1 in the axial direction A than in the second position 16, or the disc spring 28—compared to the first position 15—has a conical shape. In both cases, the toothed engagement formed by the internal teeth 25 on the inner circumference of the annular side plate 20 of the slip clutch and the external teeth 26 on the outer circumference of the flange section 27 of the hub 26 is disengaged.

[0088] To allow external rotation of the disc spring 28, the first centrifugal flange 37, and more particularly the two centrifugal flanges 37, 38, have openings in the radius of the disc spring 28, preferably in the form of elongated holes 36, through which a tool for rotating the disc spring 28 can be introduced. Preferably, it is feasible to rotate the disc spring 28 by means of its long or short disc spring tongues 29, 30, as this... Figures 7a to 7c As shown in the image.

[0089] Especially about Figures 1 to 4 The installation of the centrifugal pendulum device 4 at the torque transmission device 1 located upstream in the torque path originating from the internal combustion engine is described below.

[0090] As initially described above, the centrifugal pendulum device 4 has at least one first centrifugal pendulum flange 37 rotatable around the rotation axis D of the centrifugal pendulum device 4, or torque transmission device 1. At least one pendulum block 41 is movably suspended at the first centrifugal pendulum flange 37 to suppress rotational unevenness. The hub 23 is torsionally connected to the first centrifugal pendulum flange 37 and has a connecting section 43 disposed about the rotation axis D in a radius region that overlaps with the radius region where the pendulum block 41 is disposed. The connecting section 43 is also configured for connection with the torque transmission device 1. The connecting section 43 can be constructed as a single piece with the hub 23, but it can also be constructed as a separate component, the spatial relationship between the connecting section 43 and the hub 23 being finalized during preparation for connection with the torque transmission device 1 or during the actual connection process.

[0091] The first centrifugal pendulum flange 37 has a first tool through opening 45, which is formed in the radial region of the connecting section 43 within the first centrifugal pendulum flange 37. Preferably, the centrifugal pendulum flange 37 has an additional centering opening, which can be used to orient the centrifugal pendulum device 4 during installation.

[0092] The connecting section 43 has a connecting opening 44, which is aligned with the first tool through opening 45 along the axial direction A of the centrifugal pendulum device 4. In this context, alignment means that a tool, such as a screwdriver or riveting tool, can be inserted into the first tool through opening 45, and by means of this tool, the connecting mechanism can be inserted into or connected to the torque transmission device 1 during installation, for example, by screwing or riveting. This means that the first tool through opening 45 is generally larger than the connecting opening 44. In particular, alignment therefore means that, viewed along the axial direction A of the centrifugal pendulum device 4, the connecting opening 44 is completely within the edge of the first tool through opening 45. Thus, for example, it is possible for two connecting openings 44 to be within and aligned with the edge of a single first tool through opening 45.

[0093] The outlines or geometries of the two openings can be different. Preferably, the connecting opening 44 is circular, while the first tool through opening 45 has at least a circular outline, and is particularly circular. In particular, it is advantageous that the first tool through opening 45 has an imaginary or interpolated diameter if necessary, said diameter being at least 11 mm larger than the diameter of the connecting opening 44.

[0094] In the illustrated embodiment, the connecting segment 43 is configured as a support ring 24 that is not fixedly connected to the hub 23. When the centrifugal pendulum device 4 is implemented using the torque transmission device 1, the connecting opening 44 of the connecting segment is permanently aligned axially with the first tool through opening 45 in the axial direction A. For example, the support ring 24 can be loosely, especially rotatably, pushed onto or centered by the hub 23. Similarly, the support ring 24 can be indirectly force-oriented about the hub 23 by another component, such as a disc spring 28, so that the support ring 24 can still rotate about the hub 23 when ready to be connected to the torque transmission device 1. Preferably, there is no shape-fitting or material-fitting connection with the hub 23. The support ring 24 can have a support segment offset from the connecting opening 44 in the axial direction A, which supports the disc spring 28 in the axial direction A. The support segment can have a protrusion 33 projecting inward in the radial direction R, particularly for forming a bayonet connection with the disc spring 28.

[0095] During installation, the connecting section 43 is torsionally connected to the output side 40 of the torque limiting device 3, preferably by riveting with support ring rivets 31 introduced into the connecting opening 44 of the support ring 24. The connecting opening 44 in the support ring 24 is preferably manufactured using a stamping technique along with the entire support ring 24. On the side opposite to the first centrifugal swing flange 37, i.e., regarding... Figure 1 On the upper left side, a punched recess is formed. Correspondingly, on the side facing the first centrifugal swing flange 37, that is, regarding... Figure 1 On the upper right side, a stamped ridge is formed. The support ring 24 is preferably a sheet metal component, while the hub 23 is preferably a forged or sheet metal component.

[0096] When the pendulum block 41 moves inward along the radial direction R of the centrifugal pendulum device 4, it at least partially covers the first tool through opening 45. A plurality of tool through openings 45 are arranged in the first centrifugal pendulum flange 37 in a manner distributed along the circumferential direction U of the centrifugal pendulum device 4, preferably at the same radius and / or evenly spaced. The first tool through openings 45 are respectively arranged between two adjacent pendulum blocks 41 along the circumferential direction U. In particular, three pendulum blocks 41 are suspended at the first centrifugal pendulum flange 37, wherein the pendulum blocks 41 are evenly distributed along the circumferential direction U, i.e., staggered from each other by 120°.

[0097] In the illustrated embodiment, the second centrifugal pendulum flange 38 is disposed parallel to and offset from the first centrifugal pendulum flange 37. The second centrifugal pendulum flange 38 is torsionally engaged with the first centrifugal pendulum flange 37. The second centrifugal pendulum flange 38 has a second tool through opening 46, which is aligned with the first tool through opening 45 along the axial direction A of the centrifugal pendulum device 4. One or more pendulum blocks 41 are movably suspended between the two centrifugal pendulum flanges 37, 38. The description of the first tool through opening 45 above also applies to the second tool through opening 46.

[0098] Preferably, the first centrifugal pendulum flange 37 has breakage protection for the pendulum block 41 on its outer circumference, while the second centrifugal pendulum flange 38 has balancing capability on its outer circumference, preferably having balancing holes and balancing rivets introduced therein if necessary, so as to balance the centrifugal pendulum device 4 independently of the remaining torque transmission device 1.

[0099] The spacer bolts 42 preferably connect the first centrifugal swing flange 37 to the second centrifugal swing flange 38 in the area of ​​the tool through openings 45, 46. In particular, the spacer bolts 42 form a stop for limiting the vibration angle of the swing block 41.

[0100] The above embodiment relates to a torque transmission device 1 for a powertrain of a motor vehicle, comprising: an input element 5 rotatable to the crankshaft of an internal combustion engine of the motor vehicle; a torque limiting device 3 immediately following the input element 5 and an output element 6 immediately following the input element 5, the output element being torsionally connected to the torque limiting device 3 by means of a form-fitting connection 13, wherein the output element 6 is held in a first position 15 about the torque limiting device 3 in the axial direction A of the torque transmission device 1 by the force of a loading mechanism 14, particularly a spring, and is displaced against the force of the loading mechanism 14 in the axial direction A, wherein the output element 6 can occupy a second position 16 during the displacement in the axial direction A, in which the form-fitting connection 13 is still present, and wherein the output element 6 can occupy a third position 17 during the displacement in the axial direction A, in which the form-fitting connection 13 is removed and the output element 6 is rotatable about the torque limiting device 3.

[0101] Explanation of reference numerals in the attached figures

[0102] 1 Torque transmission equipment

[0103] 2 Torsional vibration damping device

[0104] 3. Torque limiting device

[0105] 4. Centrifugal pendulum device

[0106] 5 Input Elements

[0107] 6 Output Components

[0108] 7. Input flange

[0109] 8 Output flange

[0110] 9. Centering device

[0111] 10 Spring Channel

[0112] 11. Curved Spring

[0113] 12. Cover plate

[0114] 13. Connections with matching shapes

[0115] 14 Loading Mechanism

[0116] 15 First Position

[0117] 16 Second position

[0118] 17 Third position

[0119] 18 Counter-pressure plates

[0120] 19 Pressure Plates

[0121] 20 side panels

[0122] 21 Disc Spring

[0123] 22 Friction Liner

[0124] 23 hubs

[0125] 24 Support rings

[0126] 25 Internal teeth

[0127] 26 External teeth

[0128] 27 Flange Section

[0129] 28 Disc Springs

[0130] 29 long disc-shaped spring tongue

[0131] 30 Short disc spring tongue

[0132] 31 Support ring rivets

[0133] 32 Internal teeth

[0134] 33. Protrusion

[0135] 34. Twist the opening

[0136] 35. Twist and pass through the opening.

[0137] 36 long holes

[0138] 37 First centrifugal swing flange

[0139] 38 Second centrifugal swing flange

[0140] 39 Input side

[0141] 40 Output side

[0142] 41. Arrangement blocks

[0143] 42 spacer bolts

[0144] 43 Connecting Section

[0145] 44 Connection opening

[0146] 45. The first tool pierces the opening.

[0147] 46. ​​The second tool pierces the opening.

[0148] Axial direction

[0149] R radial direction

[0150] U circumferential direction

[0151] D Rotation axis

Claims

1. A torque transmission device (1) for a powertrain of a motor vehicle, comprising: an input element (5) capable of being screwed onto the crankshaft of an internal combustion engine of the motor vehicle; a torque limiting device (3) immediately following the input element (5) and an output element (6) immediately following the input element (5), the output element being torsionally connected to the torque limiting device (3) by means of a form-fitting connection (13), wherein the output element (6) is held in a first position (15) about the torque limiting device (3) in the axial direction (A) of the torque transmission device (1) by a force of a loading mechanism (14), and is capable of moving against the force of the loading mechanism (14) in the axial direction (A). The output element (6) can occupy a second position (16) during displacement in the axial direction (A), in which the form-fitting connection (13) is still present, and the output element (6) can occupy a third position (17) during displacement in the axial direction (A), in which the form-fitting connection (13) is removed and the output element (6) is rotatable about the torque limiting device (3), wherein the loading mechanism (14) is configured as a disc spring (28) which is rotatable about the torque limiting device (3) in a limited manner in the circumferential direction (U) of the torque transmission device (1).

2. The torque transmission device (1) according to claim 1, wherein the output element (6) has at least one screw-through opening (35) that is aligned with a corresponding screw-through opening (34) in the input element (5) for screwing the input element (5) to the crankshaft of the internal combustion engine.

3. The torque transmission device (1) according to claim 1, wherein the torque limiting device (3) is configured as a slip clutch.

4. The torque transmission device (1) according to claim 1, wherein the form-fitting connection (13) is configured as a toothed part, the form-fitting connection enabling the output element (6) to be displaced about the torque limiting device (3) in the axial direction (A) and disposed between the torque limiting device (3) and the output element (6).

5. The torque transmission device (1) according to claim 4, wherein the disc spring is supported at a support ring (24) that is torsionally connected to the output side (40) of the torque limiting device (3) and pre-tightened to the flange section (27) of the output element (6), wherein the flange section (27) is provided with the external teeth (26) of the insertion teeth on its outer circumference.

6. The torque transmission device (1) according to claim 5, wherein the torque limiting device (3) is rotatably held by the support ring (24).

7. The torque transmission device (1) according to claim 5, wherein the disc spring (28) spatially restricts the displacement of the output element (6) in the axial direction (A) to the second position (16) in the initial position, and wherein the disc spring (28) releases the spatial restriction in a rotational position about the initial position and enables the displacement of the output element (6) in the axial direction (A) to the third position (17).

8. The torque transmission device (1) according to claim 7, wherein the disc spring (28) has a long disc spring tongue (29) and a short disc spring tongue (30), wherein the disc spring (28) is supported at the support ring (24) not only in the initial position but also in the rotational position by its long disc spring tongue (29), and wherein the disc spring (28) is supported at the support ring (24) in the initial position by its short disc spring tongue (30) in order to limit the disc spring. (28) Displacement along the axial direction (A) such that the disc spring (28) spatially restricts the displacement of the output element (6) from the second position (16), and wherein the short disc spring tongue (29) is no longer supported at the support ring (24) in the rotational position of the disc spring (28), so that the displacement of the disc spring (28) along the axial direction (A) can be realized, such that the disc spring (28) spatially releases the output element (6) to the displacement in the third position (17).

9. The torque transmission device (1) according to any one of claims 1 to 8, wherein a centrifugal pendulum device (4) is provided at the output element (6), the centrifugal pendulum device having at least one first centrifugal pendulum flange (37), wherein the first centrifugal pendulum flange (37) has an opening in the radius of the disc spring (28), through which a tool for rotating the disc spring (28) can be introduced.

Images