Torque limiter and torsional vibration damper having a torque limiter

Abstract

The invention relates to a torque limiter (1) having a first side disk (2), a second side disk (3) and a flange element (4), wherein a first friction lining (9) is arranged between the first side disk and the flange element and a second friction lining (10) is arranged between the second side disk and the flange element, wherein the first friction lining is connected form-fittingly with the first side disk and the second friction lining is connected form-fittingly with the second side disk, wherein the first and / or the second side disk has at least one or more punched-out protrusions (11), wherein the first and / or the second friction lining has at least one recess (13), into which the punched-out protrusions engage form-fittingly in the axial direction, wherein the at least one punched-out protrusion has a non-circular contour when viewed in a plane parallel to the respective side disk, and wherein the at least one recess of the respective friction lining has a matching non-circular contour when viewed in a plane parallel to the respective friction lining.

Description

Technical Field

[0001] This invention relates to a torque limiter and a torsional vibration damper having a torque limiter, particularly for use in motor vehicles or motor vehicle powertrains. Background Technology

[0002] Motor vehicles have powertrains, within which torque fluctuations may occur. These torque fluctuations are particularly prevalent in internal combustion engines or hybrid engines with internal combustion engines, as internal combustion engines generate periodic torque fluctuations. Torque peaks can occur here, which should not be transmitted to protect the components in the powertrain. However, torque peaks that should be limited occur not only from the engine side but also from the wheel side. Therefore, torque limiters are increasingly required, for example, in torsional vibration dampers. Here, the torque limiter is typically configured such that friction bushings are provided on both sides of a flange, each bushing being loaded onto the flange by a side plate. For this purpose, a spring element can be provided adjacent to the side plate, generating preload between the side plate and the flange, or the flange itself can be configured as a disc-shaped spring element to generate preload.

[0003] Each side plate here has a circular flange stamped out from its annular surface, which engages in a circular receiving portion of an adjacently disposed friction liner so as to non-rotatably connect the respective friction liner with respect to the respective side plate.

[0004] In modern torque limiters, increasingly demanding requirements necessitate an optimization that balances technical necessity with economic efficiency, minimizing the gap between the minimum and maximum torque to be transmitted. Furthermore, the torque limiter must maintain reliable functionality throughout its planned lifespan. This should be achieved, correspondingly, at the lowest possible cost. Summary of the Invention

[0005] The object of the present invention is to provide a torque limiter and a torsional vibration damper having a torque limiter, which achieves reliable function during the planned service life, wherein this should still be advantageously achieved even with reduced costs.

[0006] The purpose of the torque limiter is achieved by means of the features of the present invention.

[0007] One embodiment of the present invention relates to a torque limiter having a first side plate, a second side plate, and a flange element disposed between the two side plates, the first and second side plates being torsionally connected to each other, wherein the flange element is rotatably disposed relative to the side plates, wherein a first friction liner is disposed between the first side plate and the flange element, and a second friction liner is disposed between the second side plate and the flange element, wherein the first friction liner is form-fitted to the first side plate and the second friction liner is form-fitted to the second side plate, wherein the two friction liners are frictionally fitted against the flange element under axial preload, wherein the first side plate and / or the second side plate has at least one or more stamped protrusions, wherein the first friction liner and / or the second friction liner has at least one recess, wherein the stamped protrusion is form-fitted into the recess in the axial direction, wherein at least one stamped protrusion has a non-circular profile when viewed in a plane parallel to the respective side plate, and wherein at least one recess of the respective friction liner has a matching non-circular profile when viewed in a plane parallel to the respective friction liner. The non-circular contour of the stamped protrusion and the recess are achieved, which less strongly compromises the fit of the shape because the straight, planar areas abut each other, making it easier to prevent the protrusion from slipping out of the recess. This ensures reliable function of the torque limiter throughout its designed service life.

[0008] In another embodiment, it is also suitable that the first side disc and / or the second side disc have a plurality of stamped protrusions distributed circumferentially, wherein the corresponding stamped protrusions extend axially from the first side disc or from the second side disc, and wherein the first friction liner and / or the second friction liner have a plurality of recesses, wherein the stamped protrusions are form-fitted into the recesses axially. This further improves the form-fitting connection between the side disc and the friction liner.

[0009] In another embodiment, it is also suitable that at least one stamped protrusion, or at least one or all of the stamped protrusions, is configured as an opening with an axially extending opening edge and / or a planar closed flange. Thus, particularly in thinner side disc configurations, the stamped protrusion can be configured as an opening with an opening edge, while in thicker side discs, a solid stamped flange without an opening as a stamped protrusion can be advantageous. A mixed form of an opening with an opening edge and / or a flange, or only a flange or only an opening with an opening edge, can also be provided.

[0010] In another embodiment, it is also suitable that the profile of at least one stamped protrusion, when viewed in a plane parallel to the corresponding side plate, and / or the profile of at least one recess of the corresponding friction liner, is substantially angularly formed in a plane parallel to the corresponding friction liner, such as, for example, substantially quadrilateral, rectangular, square, trapezoidal, or polygonal. This is particularly achieved by a polygonal configuration, where the edges and faces of the protrusion and recess, extending substantially circumferentially, are opposite each other to achieve good force transmission between the side plate and the friction liner.

[0011] A particularly advantageous aspect is that the corresponding contour is configured with rounded corners. Therefore, rectangles, squares, or trapezoids can be configured with contours featuring rounded corners. This simplifies manufacturing and reduces the cutting effect at the corners.

[0012] Particularly advantageous are the substantially square profiles configured such that two sides of the profile are oriented substantially radially and two other sides are oriented substantially circumferentially; or the substantially rectangular profiles configured such that two sides of the profile are oriented substantially radially and two other sides are oriented substantially circumferentially; or the substantially trapezoidal profiles configured such that two sides of the profile are oriented substantially radially and two other sides are oriented substantially circumferentially, wherein, in particular, the parallel sides are oriented substantially circumferentially and the two inclined, extending sides are oriented substantially radially. This advantageously enables force transmission between the side plate and the friction liner, particularly via the opposing extended edges and surfaces of the protrusions and recesses.

[0013] It is also appropriate that the two obliquely extending sides of the trapezoidal profile of the stamped protrusion lie on two intersecting lines, the intersection of which is located radially inward or radially outward of the stamped protrusion, particularly radially inward and flush with the axis of rotation of the torque limiter. It is especially advantageous that the intersection is located radially inward of the protrusion, particularly aligned with the axis of rotation. This allows for the almost radial extension of the radially extending sides, resulting in advantageous force transmission.

[0014] It is also suitable that the first and second side discs are non-rotatably and axially fixedly connected, for example, by riveting, wherein a flange element disposed between the side discs is arranged in a basin shape and tensioned in the manner of a disc spring for tensioning the friction bushing to the flange element. This achieves a preferred configuration that can handle loading without the need for additional disc springs, since the flange element itself generates the force load.

[0015] In another suitable embodiment, the first side plate is non-rotatably and axially fixedly connected to the support plate, such as by riveting, for example, wherein the second side plate is axially disposed between the first side plate and the support plate, and wherein a disc spring is pre-tensioned between the support plate and the second side plate to tension the friction bushing to the flange element. In this embodiment, good force distribution can be achieved due to the individual disc spring.

[0016] The purpose of the torsional vibration damper is achieved by means of the features of the present invention.

[0017] One embodiment of the present invention relates to a torsional vibration damper having a torque limiter according to the present invention. Attached Figure Description

[0018] The present invention is described in detail below with reference to preferred embodiments and the accompanying drawings.

[0019] This is shown here:

[0020] Figure 1 A schematic cross-sectional view showing a first embodiment of the torque limiter for a torsional vibration damper is shown.

[0021] Figure 2 Showing according to Figure 1 Another cross-sectional view of the torque limiter.

[0022] Figure 3 Showing according to Figure 1 A schematic cross-sectional view of the torque limiter.

[0023] Figure 4 Showing according to Figure 1 A view of the stamped protrusion on the side disc of the torque limiter.

[0024] Figure 5 Showing according to Figure 4 A view of the stamped protrusion on the side disc of the torque limiter.

[0025] Figure 6 Showing according to Figure 1 A view of the recessed portion of the friction liner serving as the receiving part.

[0026] Figure 7 A view showing the stamped protrusion of the side disc of the torque limiter according to the second embodiment is shown.

[0027] Figure 8 A view showing the stamped protrusion of the side disc of the torque limiter according to the third embodiment is shown.

[0028] Figure 9 A view showing the stamped protrusion of the side disc of the torque limiter according to the fourth embodiment is shown.

[0029] Figure 10 A schematic cross-sectional view of the torsional vibration damper according to the fifth embodiment of the torque limiter is shown.

[0030] Figure 11 Showing according to Figure 10 Cross-sectional view of the torque limiter.

[0031] Figure 12 Showing according to Figure 10 Or another cross-sectional view of the torque limiter of 11,

[0032] Figure 13 according to Figure 12 A cross-sectional view of the side disc of the torque limiter.

[0033] Figure 14 Showing according to Figure 12 A cross-sectional view of the other side disc of the torque limiter.

[0034] Figure 15 Showing according to Figure 12 A view of the opening of the friction liner as the receiving part, and

[0035] Figure 16 Showing according to Figure 11 A 3D view of the torque limiter. Detailed Implementation

[0036] Figures 1 to 6 A first embodiment of a torque limiter 1, such as a torsional vibration damper, is shown, where the torque limiter is, for example, a slipper clutch. Figures 1 to 6 Different parts and views of torque limiter 1 are shown.

[0037] The torque limiter 1 has a first side plate 2 and a second side plate 3. A flange element 4 is provided between the two side plates 2 and 3.

[0038] The first side plate 2 and the support plate 5 are non-rotatably and axially fixedly connected, for example by means of a riveting element 6, which rivets the first side plate 2 and the support plate 5 together radially inward. A spring element 7 is axially disposed between the support plate 5 and the second side plate 3, the spring element being radially externally supported at the second side plate 3 and radially internally axially supported at the support plate 5. The spring element 7 is configured as a disc spring and loads the second side plate 3 axially toward the first side plate 2.

[0039] The first side plate 2 and the second side plate 3 are torsionally connected to each other, for example, by means of a torsionally connected first side plate 2 to support plate 5 and second side plate 3 to support plate 5, for example, via a form-fitting connecting plate that extends from the second side plate 3 and engages in a recess in the support plate 5. Here, the connecting plate extends from the second side plate 3, for example, in an axial direction.

[0040] A flange element 4 is axially disposed between the two side plates 2 and 3 and is rotatably disposed relative to the side plates 2 and 3.

[0041] A first friction liner 9 is provided between the first side plate 2 and the flange element 4, and a second friction liner 10 is provided between the second side plate 3 and the flange element 4.

[0042] The first friction pad 9 is shaped to be connected to the first side plate 2 and the second friction pad 10 is shaped to be connected to the second side plate 3.

[0043] Due to the force applied by the spring element 7, the two friction bushings 9 and 10 are frictionally fitted against the flange element 4 under axial preload.

[0044] To form a form-fit connection between the respective side discs 2, 3 and the respective friction bushings 9, 10, the first side disc 2 and / or the second side disc 3 have at least one or more embossed protrusions 11. The embossed protrusions 11 extend axially from the respective side discs 2, 3.

[0045] The first friction pad 9 and / or the second friction pad 10 have at least one recess 13, and the embossed protrusion 11 is shaped to engage with the recess in the axial direction.

[0046] Spring element 7, for example a disc spring, is also used here to preload friction bushings 9 and 10 onto flange element 4.

[0047] from Figures 1 to 6 As can be seen, at least one embossed protrusion 11 has a non-circular profile in a plane parallel to the corresponding side discs 2, 3, and at least one recess 13 of the corresponding friction pads 9, 10 also has a matching non-circular profile in a plane parallel to the corresponding friction pads 9, 10.

[0048] In one embodiment, the first side disc 2 and / or the second side disc 3 have a plurality of embossed protrusions 11 distributed circumferentially, the embossed protrusions extending axially from the first side disc 2 and / or the second side disc 3. Correspondingly, the first friction liner 9 and / or the second friction liner 10 have a plurality of recesses 13, wherein the embossed protrusions 11 axially project and form-fit into the corresponding recesses 13 in the axial direction.

[0049] Here, the embossed protrusion 11 can be configured, for example, as an opening with a surrounding, axially extending opening edge. This configuration is preferred when the side discs 2 and 3 are constructed very thinly, where, due to the thin material thickness, constructing a closed stamping flange is not feasible or not well feasible.

[0050] Instead of configuring the two side discs 2 and 3 as embossed protrusions 11 with axially projecting open edges, at least one of the first side disc 2 and / or the second side disc 3 may also have at least one planar closed flange as an embossed protrusion 11 or have a plurality of planar closed flanges distributed circumferentially as embossed protrusions 11, wherein the corresponding flanges as embossed protrusions 11 extend axially from the first side disc 2 and / or from the second side disc 3. Here, the first friction liner 9 or the second friction liner 10 may also have one or more recesses 13, wherein the flanges can correspondingly and shape-fit into the recesses 13 in the axial direction. Here, the material thickness of the side discs 2 and 3 having at least one opening as an embossed protrusion 11 with a rolled edge as an open edge is thinner than the material thickness of the side discs 3 and 2 having at least one flange as an embossed protrusion 11.

[0051] Figure 3 , 4 Figure 5 shows that the embossed protrusion 11 has a substantially angular, such as substantially rectangular, profile, wherein alternatively, it may also have a substantially square, substantially trapezoidal, and / or substantially polygonal profile. The corresponding recess 13 has a complementary profile for receiving the embossed protrusion 11.

[0052] The embossed protrusion 11 can have a profile with rounded corners, wherein the diameter of the rounded corners is optionally in the range of 0.1 mm to 5 mm, and advantageously in the range of 0.2 mm to 3 mm.

[0053] Figure 4 and 5 The image shows the generally rectangular outline of an embossed protrusion 11 with two short sides 14 and two long sides 15 with rounded corners 16. The two sides 14 extend substantially circumferentially and the two sides 15 extend substantially radially.

[0054] The recess 13 of the friction linings 9 and 10 has a matching substantially rectangular profile with rounded corners, see [reference needed]. Figure 6 . Figure 6 The outline of a recess 13, which has two short sides 17 and two long sides 18 with rounded corners 19, is shown. The two sides 17 extend substantially in a circumferential direction and the two sides 18 extend substantially in a radial direction.

[0055] Along the circumferential direction, the force transmission between the protrusion 11 and the recess 13 occurs via the long edges of the sides 15 and 18.

[0056] The embossed protrusions 11 and recesses 13 can be distributed and / or disposed on the circumference of the side discs 2, 3 and the friction bushings 9, 10 at the same radial height and / or on the same circumference of the opposite side discs 2, 3 or the friction bushings 9, 10. Alternatively or additionally, the embossed protrusions 11 of the opposite side discs 2, 3 can be disposed at different radial heights and / or on different circumferences.

[0057] Torque limiter 1 is, for example, part of a torsional vibration damper, which is not shown.

[0058] Figure 7 The view shown as a second embodiment illustrates an embossed protrusion 11, which is alternatively configured to be substantially square. The substantially square outline of the embossed protrusion 11 has two sides 14 as upper and lower sides and two sides 15 as lateral sides with rounded corners 16. The two sides 14 extend substantially circumferentially and the two sides 15 extend substantially radially. The sides 14 and 15 are substantially the same length and are arranged in a parallel pair.

[0059] Figure 8 The view shown as a third embodiment illustrates an embossed protrusion 11, which is alternatively configured to be substantially trapezoidal. The substantially trapezoidal outline of the embossed protrusion 11 has two sides 14 as upper and lower sides and two sides 15 as lateral sides with rounded corners 16. The two sides 14 extend substantially in the circumferential direction and are arranged parallel to each other and of different lengths. The two sides 15 extend substantially in the radial direction and are arranged at an angle α to each other. The sides 15 are configured to be substantially the same length. The virtual intersection S of the extensions of the two sides 15 is located radially inward of the protrusion 11. Alternatively, the virtual intersection S of the extensions of the two sides 15 can also be located radially outward of the protrusion 11.

[0060] Figure 9 The fourth embodiment shows a view of the embossed protrusion 11, which is substantially trapezoidally shaped. The substantially trapezoidal outline of the embossed protrusion 11 has two sides 14 as upper and lower sides and two sides 15 as lateral sides with rounded corners 16. The two sides 14 extend substantially in the circumferential direction, are arranged parallel to each other, and are of different lengths. The two sides 15 extend substantially in the radial direction and are arranged at an angle α to each other. The sides 15 are substantially the same length. The virtual intersection S of the extensions of the two sides 15 is located radially inward of the protrusion 11 and aligned with the rotation axis xx of the torque limiter 1.

[0061] Figures 10 to 16A second embodiment of a torque limiter 1, such as a torsional vibration damper 50, is shown, where the torque limiter is, for example, a slipper clutch. Figures 10 to 16 Different parts and views of the torque limiter 1 or torsional vibration damper 50 are shown.

[0062] The torsional vibration damper 50 has an input component 51 and an output component 52. A damping device 53 and a torque limiter 1 are connected in series in the torque flow between the input component 51 and the output component 52. The torque limiter 1 is connected downstream of the damping device 53 as a slip clutch. The damping device 53 is, for example, a spring damper device with a friction device and / or a centrifugal pendulum device.

[0063] The torque limiter 1 has a first side plate 2 and a second side plate 3. A flange element 4 is provided between the two side plates 2 and 3.

[0064] The first side plate 2 and the second side plate 3 are non-rotatably and axially fixedly connected, for example by means of a riveting element 6, which rivets the first side plate 2 and the second side plate 3 together radially inside each other.

[0065] A flange element 4 is axially disposed between the two side plates 2 and 3 and is rotatably disposed relative to the side plates 2 and 3. Here, the flange element 4 is itself basin-shaped and is configured according to the type of disc spring, and is itself tensioned relative to the side plates 2 and 3.

[0066] A first friction liner 9 is provided between the first side plate 2 and the flange element 4, and a second friction liner 10 is provided between the second side plate 3 and the flange element 4. The first friction liner 9 is form-fitted to the first side plate 2 and the second friction liner 10 is form-fitted to the second side plate 3.

[0067] Due to the force applied by flange element 4, the two friction bushings 9 and 10 are frictionally fitted against flange element 4 under axial preload.

[0068] To form a form-fit connection between the respective side discs 2, 3 and the respective friction bushings 9, 10, the first side disc 2 and / or the second side disc 3 have at least one or more embossed protrusions 11. The embossed protrusions 11 extend axially from the respective side discs 2, 3.

[0069] The first friction pad 9 and / or the second friction pad 10 have at least one recess 13, and the embossed protrusion 11 is shaped to engage with the recess in the axial direction.

[0070] The embossed protrusions 11 and recesses 13 have non-circular contours, such as particularly angular contours, such as substantially rectangular contours, substantially square contours, or substantially trapezoidal contours, as has also been addressed. Figures 1 to 9Description. The corners of the corresponding contour can be rounded.

[0071] In one embodiment, the first side disc 2 and / or the second side disc 3 have a plurality of embossed protrusions 11 distributed circumferentially, the embossed protrusions extending axially from the first side disc 2 and / or the second side disc 3. Correspondingly, the first friction liner 9 and / or the second friction liner 10 have a plurality of recesses 13, wherein the embossed protrusions 11 are shaped-fitted into the corresponding recesses 13 axially.

[0072] In other respects, refer to Figures 1 to 9 The description of the previously described embodiments, in Figures 10 to 16 The embodiments may also include its features.

[0073] List of reference numerals in the attached diagram:

[0074] 1. Torque limiter

[0075] 2 First side plate

[0076] 3 Second side plate

[0077] 4 Flange components

[0078] 5 Support Plates

[0079] 6. Riveting components

[0080] 7. Spring elements

[0081] 9 First friction liner

[0082] 10 Second Friction Liner

[0083] 11 protrusions

[0084] 13 recesses

[0085] 14 short sides

[0086] 15 long side

[0087] 16 Rounded corners

[0088] 17 Short Sides

[0089] 18 long side

[0090] 19. Rounded corners

[0091] 50 Torsional Vibration Damper

[0092] 51 Input Components

[0093] 52 Output Components

[0094] 53 Vibration damping device

Claims

1. A torque limiter (1) having a first side plate (2), a second side plate (3), and a flange element (4) disposed between the two side plates (2, 3), the first side plate (2) and the second side plate (3) being torsionally connected to each other, wherein the flange element (4) is rotatably disposed relative to the first side plate (2) and the second side plate (3), wherein a first friction liner (9) is disposed between the first side plate (2) and the flange element (4), and a second friction liner (10) is disposed between the second side plate (3) and the flange element (4), wherein the first friction liner (9) is form-fitted to the first side plate (2) and the second friction liner (10) is form-fitted to the second side plate (3). The two friction linings (9, 10) are frictionally fitted against the flange element (4) under axial preload, wherein the first side plate (2) and / or the second side plate (3) have at least one stamped protrusion (11), wherein the first friction lining (9) and / or the second friction lining (10) have at least one recess (13), wherein the stamped protrusion (11) is shaped-fitted into the recess in the axial direction, wherein the at least one stamped protrusion (11) has a non-circular profile when viewed in a plane parallel to the respective side plate (2, 3), and wherein the at least one recess (13) of the respective friction lining (9, 10) has a matching non-circular profile in a plane parallel to the respective friction lining (9, 10).

2. The torque limiter (1) according to claim 1. Its features are, The first side plate (2) and / or the second side plate (3) have a plurality of stamped protrusions (11) distributed circumferentially, wherein the corresponding stamped protrusions (11) extend axially from the first side plate (2) or from the second side plate (3), wherein the first friction liner (9) and / or the second friction liner (10) have a plurality of recesses (13), wherein the stamped protrusions (11) are shaped to fit into the recesses (13) axially.

3. The torque limiter (1) according to claim 2. Its features are, The at least one stamped protrusion (11) or at least one of the stamped protrusions (11) is configured as an opening with an axially extending opening edge and / or configured as a surface-closed flange.

4. The torque limiter (1) according to claim 1. Its features are, The profile of the at least one stamped protrusion (11) is observed in a plane parallel to the corresponding side disc (2, 3) and / or the profile of the at least one recess (13) of the corresponding friction lining (9, 10) is substantially angularly formed in a plane parallel to the corresponding friction lining (9, 10).

5. The torque limiter (1) according to claim 4. Its features are, The outline has rounded corners (16, 19).

6. The torque limiter (1) according to claim 4. Its features are, The outline of a rectangle is generally set such that two sides of the outline are oriented substantially radially and two other sides of the outline are oriented substantially circumferentially, or the outline of a trapezoid is generally set such that two sides of the outline are oriented substantially radially and two other sides of the outline are oriented substantially circumferentially.

7. The torque limiter (1) according to claim 4. Its features are, The two inclined, extended sides of the trapezoidal profile of the stamped protrusion (11) lie on two intersecting lines, the intersection of which is located either radially inside or radially outside the stamped protrusion (11).

8. The torque limiter (1) according to any one of the preceding claims. Its features are, The first side plate (2) and the second side plate (3) are non-rotatably and axially fixedly connected, wherein the flange element (4) disposed between the side plates (2, 3) is disposed in a basin shape and tensioned in the manner of a disc spring for tensioning the friction liner (9, 10) onto the flange element (4).

9. The torque limiter (1) according to any one of claims 1 to 7. Its features are, The first side plate (2) is non-rotatably and axially fixedly connected to the support plate (5), wherein the second side plate (3) is axially disposed between the first side plate (2) and the support plate (5), wherein a disc spring is tensioned between the support plate (5) and the second side plate (3) for tensioning the friction liner (9, 10) to the flange element (4).

10. A torsional vibration damper (50) having a torque limiter (1) according to any one of the preceding claims.

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