Torsional vibration damping system for hydrodynamic torque coupling device

Abstract

The invention relates to a torsional vibration damping system for a hydrodynamic torque coupling device, comprising: a piston disc; the retaining disc is fixedly connected with the piston disc; a driven disc; a plurality of primary elastic assemblies held radially outward of the holding disc; a plurality of secondary elastic assemblies held radially inward of the holding disc; when the piston disc rotates, the primary elastic assembly can receive torque from the retaining disc and transmit the torque to the driven disc, so that the driven disc can rotate by an angle stroke relative to the retaining disc, and in the first angle stroke, the primary elastic assembly is compressed, and the secondary elastic assembly is not compressed; in the second angle stroke, the secondary elastic assembly is compressed between the retaining disc and the driven disc, and the primary elastic assembly is further compressed; a stop window is provided in the driven disc, and a stop tab is provided on the retaining disc, which stops against the edge of the corresponding stop window at the end of the angular travel. The invention also relates to an associated hydrodynamic torque coupling device and a motor vehicle.

Description

[0001] This application is a divisional application of the invention patent application with the application date of August 7, 2019, application number 201910725335.2, and invention name “Torsional Vibration Damping System for Hydraulic Torque Connection Device”. Technical Field

[0002] The present invention relates to a torsional vibration damping system for a hydraulic torque coupling device, and also to a hydraulic torque coupling device comprising such a torsional vibration damping system, and a motor vehicle comprising such a hydraulic torque coupling device. Background Art

[0003] The torsional vibration damping system for the hydraulic torque coupling device in the prior art usually includes an elastic component for transmitting torque and reducing vibration. The setting of the elastic component, such as its size, distribution mode, hardness, etc., has an important influence on the performance of the torsional vibration damping system. In the prior art, in order to meet the different requirements for the torsional vibration damping system, it is often necessary to change the setting of the elastic component, and the change of the setting of the elastic component often causes the change of other components used to maintain the elastic component, that is, it is necessary to design and manufacture the elastic component and other related components according to specific performance requirements, which leads to low product standardization and low cost-effectiveness. In addition, the existing torsional vibration damping system usually only has elastic components that work at the same time, that is, such elastic components are arranged into a primary damping structure, so that it cannot simultaneously meet the requirements of good vibration reduction and efficient torque transmission. In addition, the existing torsional vibration damping system often involves too many components and a complicated assembly process, thereby introducing a larger assembly tolerance, making the system unable to work stably, and at the same time causing the manufacturing cost and assembly cost of the components to increase accordingly, and is not conducive to achieving a compact overall structure.

[0004] The object of the present invention is to at least overcome these shortcomings in the prior art by proposing a torsional vibration damping system for a hydraulic torque coupling device. The torsional vibration damping system according to the present invention, while ensuring a higher vibration reduction capacity and torque transmission efficiency, has a simpler structure, a higher degree of standardization, is easier to assemble, and has a more compact structure, thereby having a higher cost-effectiveness. Summary of the invention

[0005] To this end, according to one aspect of the present invention, a torsional vibration damping system for a hydraulic torque coupling device is provided, which has a central axis and comprises:

[0006] a piston plate mounted so as to be rotatable about the central axis and axially displaceable along the central axis to engage with or disengage from a torque input housing of the hydraulic torque coupling device,

[0007] a retaining disk, which is fixedly connected to the piston disk,

[0008] a driven plate which can be driven to rotate about said central axis,

[0009] a plurality of primary elastic components, which are held radially outside the holding disk and distributed circumferentially around the central axis,

[0010] a plurality of secondary elastic components, which are held radially inside the holding disk and distributed circumferentially around the central axis,

[0011] wherein, when the piston disc engages the torque input housing, the primary elastic component is capable of receiving torque from the retaining disc and thereby being compressed between the retaining disc and the driven disc to transfer torque to the driven disc, so that the driven disc can rotate an angular stroke in either direction relative to the retaining disc,

[0012] In the first angular range of the angular stroke, the primary elastic component is compressed and the secondary elastic component is not compressed.

[0013] In a second angular stroke of the angular stroke, the secondary elastic component is compressed between the retaining disk and the driven disk, and the primary elastic component is further compressed;

[0014] Therein, a plurality of stop windows distributed along the circumferential direction are arranged in the driven disk, a plurality of stop convex pieces respectively extending into the corresponding stop windows are arranged on the retaining disk, and at the end point of the angular stroke, the stop convex pieces stop against the edge of the corresponding stop window.

[0015] According to the torsional vibration damping system of the present invention, the retaining disc is fixedly connected to the piston disc and retains the primary elastic component and the secondary elastic component at the same time. Such a structure reduces the number of components of the torsional vibration damping system and ensures a more compact structure in the axial direction to adapt to its installation space limitations; at the same time, this also reduces assembly operations and thus reduces possible assembly errors, making the torsional vibration damping system have better performance, more stable operation, and can further reduce manufacturing and assembly costs. In addition, the setting of the secondary damping structure can ensure good vibration reduction performance and higher torque transmission efficiency.

[0016] Moreover, when transmitting a large torque, the torque transmission between the retaining disk and the driven disk can be realized by the stop tab abutting against the edge of the stop window, instead of being realized by the compression of the primary elastic component and the secondary elastic component. That is, the stop tab abuts against the edge of the stop window to limit the maximum force applied to the coil spring, thereby limiting the compression degree of the coil spring, ensuring that the primary elastic component and the secondary elastic component will not be over-compressed to damage their elastic properties. Moreover, under the given setting of the primary elastic component and the secondary elastic component, the stop window and the stop tab are constructed to limit the maximum compression degree of the primary elastic component and the secondary elastic component, and the maximum angular travel of the driven disk relative to the retaining disk in any direction. Therefore, in the torsional vibration damping system according to the present invention, the maximum angular travel of the retaining disk relative to the driven disk can be adjusted by simply changing the structure or setting of the stop window and / or the stop tab, such as changing the circumferential length of the stop window and / or the circumferential length of the stop tab, so as to manufacture a torsional vibration damping system that meets different requirements, and the structure of other components does not need to be adjusted so as to be standardized, which greatly reduces the design and production costs.

[0017] At the same time, such stop windows and stop tabs can be correspondingly arranged on the driven disk and the retaining disk in a simple manner, without increasing the number of components, easy to process, and without taking up extra space, which is conducive to the compact arrangement of the torsional vibration damping system.

[0018] In a preferred embodiment, a first protrusion is arranged on the outer periphery of the retaining disk, the first protrusion abuts the primary elastic component and transfers the torque from the retaining disk to the primary elastic component; and / or a second protrusion is arranged on the outer periphery of the driven disk, and the primary elastic component transfers the torque to the driven disk through the second protrusion when being compressed.

[0019] Further preferably, a retaining window for retaining the secondary elastic component is provided on the retaining disk, and a third protrusion is provided on the radial inner side of the driven disk, wherein in the second angular stroke, the secondary elastic component is compressed through the circumferential end of the retaining window and the third protrusion.

[0020] The first protrusion and / or the second protrusion and / or the retaining window and / or the third protrusion are simple in structure and easy to manufacture, and allow the primary elastic component and the secondary elastic component to be retained in a compact structure, and allow the secondary transmission of torque to be effectively achieved with a simple structure and assembly relationship.

[0021] In a further preferred embodiment, the third lug is arranged to extend from the radial inner edge of the stop window, so that the third lug can be formed simply and conveniently in the process of forming the stop window, and the material of the driven disk can be fully utilized and a compact structure can be formed, thereby saving costs.

[0022] In a preferred embodiment, the elastic modulus of the secondary elastic component is greater than the elastic modulus of the primary elastic component. Such a configuration is conducive to transmitting torque with higher efficiency while ensuring good damping of torsional vibration.

[0023] In a preferred embodiment, the primary elastic component and / or the secondary elastic component comprises a helical spring, which can ensure that the primary elastic component and / or the secondary elastic component can be realized in a simple manner.

[0024] Further preferably, the torsional vibration damping system further comprises an intermediate disk, wherein the intermediate disk comprises a surrounding portion surrounding the primary elastic component in the circumferential direction. The intermediate disk can play the role of radial retention and circumferential distribution guidance for the primary elastic component.

[0025] Further preferably, each of the primary elastic components includes at least two coil springs connected in series. That is, such an arrangement of the primary elastic components can realize a so-called long-stroke damping structure, thereby further improving the working performance of the torsional vibration damping system according to the present invention, or by connecting small springs in series to form a large spring, the cost can be greatly reduced while achieving equivalent working performance of the torsional vibration damping system.

[0026] Further preferably, the intermediate disk is provided with a hook portion for connecting the at least two coil springs in series on the radial inner side of the surrounding portion. In this case, the intermediate disk does not form a fixed connection relationship with other components except for being connected to the coil spring through its hook portion, that is, the intermediate disk is "floating" and can rotate with the compression of the coil spring. Such an intermediate disk can play the role of radial retention, circumferential distribution guidance and connection of the coil spring, and is very simple to manufacture and easy to assemble, and does not occupy additional axial space, thereby further improving the performance of the torsional vibration damping system according to the present invention.

[0027] According to another aspect of the present invention, the present invention also relates to a hydraulic torque coupling device, which comprises the torsional vibration damping system according to the above.

[0028] Preferably, in the hydraulic torque coupling device according to the present invention, the driven plate of the torsional vibration damping system is fixed together with a turbine.

[0029] According to yet another aspect of the present invention, the present invention also relates to a motor vehicle comprising the hydraulic torque coupling device as described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings of the embodiments of the present invention. The drawings are only used to illustrate some embodiments of the present invention, but not to limit all embodiments of the present invention thereto. In the drawings:

[0031] Figure 1 A partial schematic diagram cut along the central axis of a hydraulic torque coupling device including a torsional vibration damping system according to an embodiment of the present invention is shown;

[0032] Figure 2 A top view of a portion of a torsional vibration damping system according to an embodiment of the present invention is shown, wherein a driven plate is removed to show a retaining plate, a primary elastic component, and a secondary elastic component;

[0033] Figure 3 Shows Figure 2 Isometric view of the portion shown in;

[0034] Figure 4 shows a perspective exploded view of a torsional vibration damping system according to an embodiment of the present invention;

[0035] Figure 5 A perspective view showing a torsional vibration damping system according to an embodiment of the present invention installed together with a turbine of a hydrodynamic torque coupling device, wherein the turbine and the driven plate are partially cut away;

[0036] Figure 6 A perspective view showing a torsional vibration damping system according to an embodiment of the present invention mounted together with a turbine of a hydrodynamic torque coupling device, wherein the turbine is partially cut away;

[0037] Figure 7 A perspective view showing a retaining disk used in a torsional vibration damping system according to an embodiment of the present invention;

[0038] Figure 8 A perspective view showing a driven disc used in a torsional vibration damping system according to an embodiment of the present invention;

[0039] Figure 9a A partially enlarged top view of a driven disk used in a torsional vibration damping system according to an embodiment of the present invention is shown, showing a stop window therein;

[0040] Figure 9b-9c Two embodiments of driven plates that may be used in a torsional vibration damping system of an embodiment of the present invention are shown;

[0041] Fig.10A schematic diagram showing secondary damping by a torsional vibration damping system according to an embodiment of the present invention is shown;

[0042] Fig.11 A perspective view of a subassembly including a driven plate and a turbine used in a torsional vibration damping system according to an embodiment of the present invention is shown;

[0043] Fig.12 Shown according to Fig.11 An exploded perspective view of the subassembly shown in ;

[0044] Fig.13 A perspective exploded view of a hydraulic torque coupling device according to an embodiment of the present invention is shown, which includes a torsional vibration damping system according to the present invention. DETAILED DESCRIPTION

[0045] In order to make the purpose, technical solution and advantages of the technical solution of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described in conjunction with the drawings of specific embodiments of the present invention. The same figure marks in the drawings represent the same parts. It should be noted that the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the described embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0046] Unless otherwise defined, the technical terms or scientific terms used herein shall have the usual meanings understood by persons of ordinary skill in the field to which the present invention belongs. The words "first", "second" and similar words used in the patent application specification and claims of the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one" or "one" do not necessarily indicate a quantity limitation. Words such as "include" or "comprise" mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0047] In the sense of the present invention, "axial" means the direction along the central axis X of the torsional vibration damping system 2, "radial" means the direction orthogonal to and intersecting the central axis X, "radial outer side (portion)" means the portion farther from the central axis X in the radial direction, "radial inner side (portion)" means the portion closer to the central axis X in the radial direction, and "circumferential" means around the central axis X.

[0048] Figure 1 A schematic diagram of a hydraulic torque coupling device 1 according to an embodiment of the present invention is shown, which includes a torque input housing 8, a torsional vibration damping system 2 provided in the torque input housing 8 according to the present invention, and a hydraulic torque converter 11.

[0049] like Figure 1-8 As shown, according to this embodiment, the torsional vibration damping system 2 has a central axis X and comprises:

[0050] A piston plate 3, which is located inside the torque input housing 8 and is installed to be rotatable about the central axis X, and the piston plate 3 can be axially displaced along the central axis X to engage with or disengage from the torque input housing 8 of the hydraulic torque coupling device 1, and when the piston plate 3 is engaged with the torque input housing 8, receives torque therefrom and thus rotates integrally therewith;

[0051] The retaining plate 4 is fixedly connected to the piston plate 3. In a specific embodiment, the retaining plate 4 is located on the opposite side of the piston plate 3 relative to the torque input housing 8, and can be fixed to the piston plate 3 by any fixing method so as to be able to rotate and axially displace integrally with the piston plate 3. For example, as in Figure 2-7 In the specific embodiment shown, axially opposite holes 25 and 26 are respectively provided in the retaining disk 4 and the piston disk 3, and the rivets 24 pass through the opposite holes 25 and 26 to fix the retaining disk 4 to the piston disk 3. Preferably, a plurality of holes 25 and 26 are respectively provided to be regularly distributed around the central axis X on the retaining disk 4 and the piston disk 3, so as to fixedly connect the retaining disk 4 to the piston disk 3 in a simple and stable manner;

[0052] a driven plate 5 which can be driven to rotate about said central axis X,

[0053] A plurality of primary elastic components 6, preferably three to six primary elastic components 6, more preferably four primary elastic components 6, are held radially outside the retaining disk 4 and distributed circumferentially around the central axis X, that is, the primary elastic components 6 thus arranged can act in the circumferential direction, such as Figure 2-6 As shown;

[0054] A plurality of secondary elastic components 7, preferably three to six secondary elastic components 7, more preferably four secondary elastic components 7, are held radially inside the retaining disk 4 and distributed circumferentially around the central axis (X), that is, the secondary elastic components 7 thus arranged can act in the circumferential direction, such as Figure 2-5 shown.

[0055] In a specific embodiment, Figure 2-8 As shown, the primary elastic component 6 and / or the secondary elastic component 7 include a coil spring. That is, in such an embodiment, at least one of the primary elastic component 6 and the secondary elastic component 7 can be composed of a coil spring. This can ensure that the primary elastic component 6 and / or the secondary elastic component 7 can be realized in a simple manner.

[0056] In this embodiment, the torsional vibration damping system 2 according to the present invention is constructed in such a way that when the piston disc 3 is axially displaced relative to the torque input housing 8 and engages with the torque input housing 8 to receive torque therefrom and rotates integrally therewith, the retaining disc 4 fixedly connected to the piston disc 3 also receives torque from the torque input housing 8 along with the piston disc 3 and rotates integrally therewith, so that the primary elastic component 6 retained by the retaining disc 4 can receive torque from the retaining disc 4 and thus be compressed between the retaining disc 4 and the driven disc 5 to transmit the torque to the driven disc 5, so that the driven disc 5 can rotate relative to the retaining disc 4 in any direction by an angular stroke α ( Figure 9a-9c ), in the first angular stroke α1 of the angular stroke α, the primary elastic component 6 is compressed, and the secondary elastic component 7 is not compressed; in the second angular stroke α2 of the angular stroke α after the angular stroke α1, the secondary elastic component 7 is compressed between the retaining disk 4 and the driven disk 5, and the primary elastic component 6 is further compressed. That is to say, in the second angular stroke α2, both the primary elastic component 6 and the secondary elastic component 7 are compressed.

[0057] Here, the angular travel α is the maximum angular travel by which the driven plate 5 can be driven to rotate relative to the holding plate 4 in any direction, and α=α1+α2.

[0058] Thus, the torsional vibration damping system 2 according to the present invention is constructed as a two-stage damping system including a primary damping composed of a primary elastic component 6 and a secondary damping composed of a secondary elastic component 7. Fig.10 As shown, Fig.10 The horizontal axis represents the relative angular travel between the driven disk 5 and the retaining disk 4 (in Figure 2 The ordinate represents the torque transmitted by the primary elastic component 6 and the secondary elastic component 7 along the relative angular travel (counterclockwise direction as evidenced by the arrow F, clockwise direction as negative). Fig.10As represented by the middle curve P1, the first section P11 shows the primary damping process, corresponding to the first section angular travel α1, in which only the primary elastic component 6 is compressed and transmits torque; the second section P12 of the curve P1 shows the secondary damping process, corresponding to the second section angular travel α2, in which the secondary elastic component 7 is compressed, and the primary elastic component 6 continues to be compressed at the same time. As shown in the figure, the slope of the second section P12 is greater than the first section P11. Curve P2 also has a secondary structure similar to curve P1, but the angular travel and stiffness coefficient of the elastic component represented by P1 are different. This structure makes it possible to stimulate only the primary damping process at the initial stage of torque transmission, that is, only the primary elastic component 6 is effective. In this case, the relative angular stroke between the driven disk 5 and the retaining disk 4 is less than or equal to the first angular stroke α1; when the torque increases, the secondary damping process is stimulated, the relative angular stroke between the driven disk 5 and the retaining disk 4 exceeds the first angular stroke α1, the secondary elastic component 7 is activated and compressed, and the primary elastic component 6 is further compressed, so that the driven disk 5 continues to rotate relative to the retaining disk 4 to produce a total relative angular stroke less than or equal to the angular stroke α.

[0059] In addition, the retaining plate 4 is fixedly connected to the piston plate 3 and the retaining plate 4 retains the primary elastic component 6 and the secondary elastic component 7. Such an embodiment reduces the number of components of the torsional vibration damping system 2 and ensures a more compact axial structure to adapt to its installation space limitations; at the same time, this also reduces assembly operations and thus reduces assembly errors that may be introduced, making the torsional vibration damping system 2 have better performance, more stable operation, and can further reduce manufacturing and assembly costs. Therefore, the torsional vibration damping system 2 according to the present invention can achieve good vibration reduction and efficient torque transmission with a simple structure and low cost.

[0060] In a preferred embodiment, the elastic modulus of the secondary elastic component 7 is greater than the elastic modulus of the primary elastic component 6. That is, the secondary elastic component 7 has a greater hardness than the primary elastic component 6. Such a configuration is conducive to transmitting torque with higher efficiency while ensuring good damping of torsional vibration.

[0061] Of course, according to actual needs, the elastic modulus of the secondary elastic component 7 can be set to be the same as or smaller than the elastic modulus of the primary elastic component 6. The above preferred embodiments are merely exemplary.

[0062] In a specific embodiment, Figure 2-7As shown, a first lug 12 is provided on the outer periphery of the retaining disk 4, the first lug 12 abuts against the primary elastic component 6 and is capable of transmitting torque from the retaining disk 4 to the primary elastic component 6. Preferably, the first lug 12 is formed integrally with the retaining disk 4. As shown in the figure, for example, a plurality of first lugs 12 are provided along the outer periphery of the retaining disk 4, each of which is located between two adjacent primary elastic components 6, and abuts against the circumferential end of one of the two adjacent primary elastic components 6 at each circumferential end. Optionally, the primary elastic component 6 is arranged to be retained by the piston disk 3 in one axial direction. Also optionally, as Figure 2-6 and Figure 8 As shown, a second lug 13 is provided on the outer periphery of the driven disc 5, and the primary elastic component 6 transmits torque to the driven disc 5 through the second lug 13 when compressed. Preferably, the second lug 13 is formed integrally with the driven disc 5. As shown in the figure, for example, a plurality of second lugs 13 are provided along the outer periphery of the driven disc 5, and each second lug 13 is placed between two adjacent primary elastic components 6.

[0063] Thus, when the piston disc 3 engages the torque input housing 8, the retaining disc 4 fixedly connected to the piston disc 3 receives the torque from the torque input housing 8 along with the piston disc 3 and thereby rotates, for example, in a counterclockwise direction (by Figure 2 The first protrusion 12 is rotated in a counterclockwise direction so that the first circumferential end 6a (shown by the arrow F in FIG. 1 ) of the primary elastic component 6 abutting against the first protrusion 12 passes through the first circumferential end 6a (shown by the arrow F in FIG. 1 ) of the primary elastic component 6 abutting against the first protrusion 12 in a counterclockwise direction. Figure 2 and Figure 5 ) applies pressure to the primary elastic component 6, thereby transmitting the torque to the primary elastic component 6 in the counterclockwise direction, and the primary elastic component 6 is loaded and compressed in the counterclockwise direction accordingly, so that the second circumferential end 6b ( Figure 2 and Figure 5 ) abuts against the adjacent second lug 13, thereby transmitting the torque to the driven disc 5 through the second lug 13.

[0064] like Figure 2-5 As shown in Figures 1 and 7, in a specific embodiment, a retaining window 14 for retaining the secondary elastic component 7 is provided on the retaining disk 4, and the retaining window 14 is preferably formed integrally with the retaining disk 4. Optionally, when the secondary elastic component 7 is not compressed, the secondary elastic component 7 is provided with a first circumferential end 7a and a second circumferential end 7b ( Figure 2) is stuck in the corresponding retaining window 14. Optionally, the secondary elastic component 7 is arranged to be retained by the piston disc 3 in one axial direction. Also optionally, a third lug 15 is arranged on the radial inner side of the driven disc 5, and preferably, the third lug 15 is arranged integrally with the driven disc 5. In the second angular stroke α2 of the driven disc 5 relative to the retaining disc 4, the secondary elastic component 7 is compressed between the corresponding circumferential end of the retaining window 14 and the third lug 15. That is, in the first angular stroke α1 of the driven disc 5 relative to the retaining disc 4, the third lug 15 does not contact the secondary elastic component 7, at the end of the first angular stroke α1, the third lug 15 contacts the secondary elastic component 7, and after the second angular stroke α2 of the driven disc 5 relative to the retaining disc 4 begins, the secondary elastic component 7 is compressed between the third lug 15 and the corresponding circumferential end of the retaining window 14.

[0065] Therefore, still taking the counterclockwise rotation of the piston disc 3 as an example, when the transmitted torque is large enough, the relative rotation stroke of the driven disc 5 relative to the retaining disc 4 becomes large enough, that is, it enters the second angular stroke α2, so that the second circumferential end 7b of the secondary elastic component 7 retained by the retaining window 14 of the retaining disc 4 abuts against the corresponding third protrusion 15, and thereby the secondary elastic component 7 is compressed between the third protrusion 15 and the first circumferential end 7a of the retaining window 14 that retains the secondary elastic component 7, thereby transmitting a part of the torque from the retaining disc 4 to the driven disc 5 through the secondary elastic component 7, and at the same time the primary elastic component 6 is further compressed and transmits another part of the torque from the retaining disc 4 to the driven disc.

[0066] The first protrusion 12 and / or the second protrusion 13 and / or the retaining window 14 and / or the third protrusion 15 are simple in structure and easy to manufacture, and allow the primary elastic component 6 and the secondary elastic component 7 to be retained in a compact structure, and allow the secondary transmission of torque to be effectively achieved with a simple structure and assembly relationship.

[0067] In a preferred embodiment, Figure 6 and 8As shown, a plurality of stop windows 9 distributed along the circumferential direction are provided in the driven disk 5, preferably three to six, more preferably four, and a plurality of stop tabs 10 are provided on the retaining disk 4, respectively extending into the corresponding stop windows 9, which are preferably formed integrally with the retaining disk 4. At the end of the angular stroke α, the stop tabs 10 stop against the edges 9a, 9b of the corresponding stop windows 9. Therefore, when transmitting a large torque, the torque transmission between the retaining disk 4 and the driven disk 5 is realized by the stop tabs 10 abutting against the edges 9a, 9b, and is no longer realized by the compression of the primary elastic component 6 and the secondary elastic component 7. That is to say, the stop tabs 10 abut against the edges of the stop windows 9 to limit the maximum force applied to the coil spring, thereby limiting the compression degree of the coil spring, ensuring that the primary elastic component 6 and the secondary elastic component 7 will not be over-compressed to damage their elastic properties.

[0068] And, if Figure 9a-9c As shown, under given settings of the primary elastic component 6 and the secondary elastic component 7, the stop window 9 and the stop protrusion 10 are constructed to be able to limit the maximum angular travel α of the driven disk 5 relative to the retaining disk 4 in any direction, as well as the maximum compression degree of the primary elastic component 6 and the secondary elastic component 7. Figure 9a Will Figure 9b The driven disc 5' and Fig.9c The driven disc 5'' shown in FIG. 1 is overlapped for comparison. Figure 9a From the perspective in FIG. 2 , the driven disk 5 ″ is located below the driven disk 5 ′, and the stop window of the driven disk 5 ″ is substantially opposite to the stop window of the driven disk 5 ′. Figure 9a As shown, the circumferential length of the stop window 9' is greater than the circumferential length of the stop window 9'. Thus, when the same stop tab 10 is used, the maximum angular stroke that can be obtained by using the driven disk 5'' with the stop window 9' is greater than the maximum angular stroke that can be obtained by using the driven disk 5' with the stop window 9'. Similarly, when using the driven disk with the same stop window, different maximum angular strokes can be obtained by changing the length of the stop tab 10. Both the stop window and the stop tab can also be adjusted. Thus, in the torsional vibration damping system 2 according to the present invention, the maximum angular stroke α of the retaining disk 4 relative to the driven disk 5 can be adjusted by simply changing the structure or setting of the stop window 9 and / or the stop tab 10, such as changing the circumferential length of the stop window 9 and / or the circumferential length of the stop tab 10, so as to manufacture a torsional vibration damping system that meets different requirements, and the structures of other components do not need to be adjusted so as to be standardized, which greatly reduces the design and production costs.

[0069] More preferably, if Figure 6 and 8As shown, the third lug 15 is arranged to extend from the radial inner edge 17 of the corresponding stop window 9. In this way, the third lug can be formed simply and conveniently during the process of forming the stop window 9, and the material of the driven disk 5 can be fully utilized and a compact structure can be formed, thereby saving costs.

[0070] In a further specific embodiment, Figure 7 As shown, the retaining disk 4 has an annular surface portion 27, and the first protruding piece 12 is arranged along the outer periphery 27a of the annular surface portion 27 and can extend outwardly from the outer periphery 27a. More specifically, the retaining window 14 is arranged along the inner periphery 27b of the annular surface portion 27 and can protrude inwardly from the inner periphery 27b. Further, the stopper protruding piece 10 can also be arranged along the inner periphery 27b of the annular surface portion 27 and can protrude from the inner periphery 27b. Such a structure ensures that the retaining disk 4 is compact in structure, has a higher material utilization rate, and can easily manufacture the first protruding piece 12 and / or the retaining window 14 and / or the stopper protruding piece 10, thereby reducing material cost and manufacturing cost.

[0071] Reference now Figure 2-6 The specific implementation of the primary elastic component 6 and the secondary elastic component 7 is described. The torsional vibration damping system 2 according to this embodiment preferably further includes an intermediate disk 18, which includes a surrounding portion 19 surrounding the primary elastic component 6 in the circumferential direction. Thus, the intermediate disk 18 can play the role of radial retention and circumferential distribution guidance for the primary elastic component 6.

[0072] In one embodiment, if Figure 2-6 As shown, the primary elastic component 6 includes at least two coil springs 20 and 21 connected in series, that is, the arrangement of the primary elastic component 6 can realize a long-stroke damping structure at a low cost. Long springs are expensive, and by connecting small springs in series to form a spring component, the cost can be greatly reduced while achieving the same working performance of the torsional vibration damping system.

[0073] Of course, other configurations of the primary elastic component 6 and / or the secondary elastic component 7 are also feasible. For example, in a variation not shown, each coil spring of the primary elastic component 6 and / or the secondary elastic component 7 can be formed by a large diameter outer coil spring and a small diameter coil spring disposed inside the large diameter outer coil spring.

[0074] Also preferably, if Figure 2-6As shown, the intermediate disk 18 further includes a hook portion 22 disposed radially inside the surrounding portion 19, and the hook portion 22 is used to connect and hold the at least two coil springs 20, 21 in series. In this case, the intermediate disk 18 does not form a fixed connection relationship with other components except for being connected to the coil springs 20, 21 through its hook portion 22, that is, the intermediate disk 18 is "floating" and can rotate with the compression of the coil springs 20, 21. Such an intermediate disk 18 can play the role of radially holding, circumferentially distributed guiding and connecting the coil springs 20, 21, while being very simple to manufacture and very easy to assemble, and does not occupy additional axial space, thereby further improving the performance of the torsional vibration damping system 2 according to the present invention.

[0075] According to a further preferred embodiment, Figure 2-7 As shown, the first protrusion 12 of the retaining disk 4 is configured to prevent the intermediate disk 18 from axially shifting relative to the primary elastic component 6. Figure 2 and 7 As shown, the first protruding piece 12 is constructed to have an axially extending portion 12c and a bent portion 12b bent radially outward from the axially extending portion 12c. In the assembled state, the axially extending portion 12c of the first protruding piece 12 abuts against the corresponding primary elastic component 6 to apply force to the primary elastic component 6. At this time, the bent portion 12b is axially opposite to the surrounding portion 19 of the intermediate disk 18, so as to play an axial holding role for the retaining disk 18. This embodiment can achieve the relative stability of the retaining disk 18 in a simple manner and with a compact structure, thereby facilitating the stable operation of the torsional vibration damping system 2 according to the present invention.

[0076] It should be noted that the above embodiments are merely illustrative and should not be construed as limiting the present invention, and the above embodiments can be combined unless such a combination is not technically permitted.

[0077] According to another aspect of the present invention, the present invention also relates to a hydraulic torque coupling device 1, comprising the torsional vibration damping system 2 described above, such as Figure 11-13 As shown. Fig.11 As shown, the driven plate 5 of the torsional vibration damping system 2 described above is fixedly connected to the turbine 23 of the hydraulic torque converter 11, for example, by riveting. Thus, the turbine 23 can be axially displaced together with the driven plate 5 along with the piston plate 3.

[0078] The invention also relates to a motor vehicle comprising a hydrodynamic torque connection device 1 as described above.

[0079] The exemplary implementation scheme of the torsional vibration damping system for hydraulic torque connection proposed in the present invention is described in detail above with reference to the preferred embodiments. However, it can be understood by those skilled in the art that, without departing from the concept of the present invention, various modifications and variations can be made to the above-mentioned specific embodiments, and various technical features and structures proposed in the present invention can be combined in various ways without exceeding the scope of protection of the present invention.

Claims

1. A torsional vibration damping system (2) for a hydraulic torque coupling device (1), having a central axis (X) and comprising: a piston disc (3) mounted so as to be rotatable about the central axis (X) and axially displaceable along the central axis (X) to engage with or disengage from the torque input housing (8) of the hydraulic torque coupling device (1), A retaining plate (4) which is fixedly connected to the piston plate (3), a driven disc (5) which can be driven to rotate about said central axis (X), a plurality of primary elastic components (6) which are held radially outside the retaining disk (4) and distributed circumferentially around the central axis (X), a plurality of secondary elastic components (7) which are held radially inside the retaining disk (4) and distributed circumferentially around the central axis (X), wherein, when the piston disc (3) engages the torque input housing (8), the primary elastic component (6) is capable of receiving torque from the retaining disc (4) and thereby being compressed between the retaining disc (4) and the driven disc (5) to transmit the torque to the driven disc (5), so that the driven disc (5) can rotate relative to the retaining disc (4) in any direction by an angular stroke (α), In a first section (α1) of the angular stroke (α), the primary elastic component (6) is compressed, and the secondary elastic component (7) is not compressed. In a second angular stroke (α2) of the angular stroke (α), the secondary elastic component (7) is compressed between the retaining disk (4) and the driven disk (5), and the primary elastic component (6) is further compressed; A plurality of stop windows (9) distributed along the circumferential direction are arranged in the driven disk (5), a plurality of stop protrusions (10) are arranged on the retaining disk (4) and extend into corresponding stop windows (9), respectively, and at the end point of the angular stroke (α), the stop protrusions (10) abut against the edges (9a, 9b) of the corresponding stop windows (9) to stop.

2. The torsional vibration damping system (2) according to claim 1, wherein: A first protrusion (12) is provided on the outer periphery of the retaining disk (4), wherein the first protrusion (12) abuts against the primary elastic component (6) and transmits torque from the retaining disk (4) to the primary elastic component (6); and / or A second lug (13) is provided on the outer periphery of the driven disc (5), and when the primary elastic component (6) is compressed, it transmits torque to the driven disc (5) through the second lug (13).

3. The torsional vibration damping system (2) according to claim 1 or 2, wherein: A retaining window (14) for retaining the secondary elastic component (7) is provided on the retaining disk (4), and a third protrusion (15) is provided on the radial inner side of the driven disk (5). Wherein, in the second angular stroke, the secondary elastic component (7) is compressed through the circumferential end of the retaining window (14) and the third protrusion (15).

4. The torsional vibration damping system (2) according to claim 3, wherein: The third protrusion (15) is arranged to extend from a radial inner edge (17) of the stop window (9).

5. The torsional vibration damping system (2) according to claim 1 or 2, wherein: The elastic modulus of the secondary elastic component (7) is greater than the elastic modulus of the primary elastic component (6).

6. The torsional vibration damping system (2) according to claim 1 or 2, wherein: The primary elastic component (6) and / or the secondary elastic component (7) comprises a coil spring.

7. The torsional vibration damping system (2) according to claim 6, It also includes an intermediate disk (18), the intermediate disk (18) including a surrounding portion (19) surrounding the primary elastic component in the circumferential direction.

8. The torsional vibration damping system (2) according to claim 7, wherein: Each of the primary elastic components (6) comprises at least two coil springs (20, 21) connected in series.

9. The torsional vibration damping system (2) according to claim 8, wherein: The intermediate disk (18) is provided with a hook portion (22) on the radial inner side of the surrounding portion (19) for connecting the at least two coil springs (20, 21) in series.

10. A hydrodynamic torque coupling device (1) comprising a torsional vibration damping system (2) according to any one of the preceding claims.

Images