Torsional vibration damper

Abstract

The utility model relates to a torsional vibration damper, which comprises a hub, a torsional vibration damper, a torsional vibration damper and a torsional vibration damper, the radial inner end of the single flange plate comprises an inner tooth groove, the single flange plate is arranged outside the hub in a sleeving mode, the inner tooth groove is meshed with the outer gear, and a circumferential tooth gap exists between the inner tooth groove and the outer gear; the radial outer ends of the elastic spokes are fixedly connected with the single flange plate, the radial inner ends of the elastic spokes are fixedly connected with the hub, and when the single flange plate and the hub rotate relatively within the tooth gap range, the elastic spokes have elasticity. Therefore, torsional vibration between the single flange plate and the hub is absorbed. The elastic spokes have elasticity and can allow relative rotation between the single flange plate and the hub, the pre-damping effect is achieved, direct collision between the inner tooth groove and the outer gear is avoided, and the NVH performance is improved. And the radial outer ends of the elastic spokes are fixedly connected with the single flange plate and the hub, so that the relative axial position between the hub and the single flange plate is limited.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle shock absorption, in particular to a torsional vibration damper. Background Art

[0002] Internal combustion engines will continue to power vehicles for the foreseeable future. Regardless of the type of transmission used, the fundamental requirements for torque transfer between the engine and transmission remain the same: to reduce torsional vibration and rotational non-uniformity while ensuring starting and delivering average torque. Therefore, a vibration damping device is typically installed between the engine and transmission to absorb and dampen torque vibrations from the engine (forward torque transfer) or from the motor within the transmission case (reverse torque transfer).

[0003] Existing torsional vibration damping devices generally include a torque limiter and a torsional vibration damper. Torque is transmitted in the torsional vibration damper through a coil spring, and torsional vibration and torsional shock during the torque transmission process are absorbed. However, the coil spring needs to reach a certain transmission torque before it can be compressed to absorb torsional vibration and shock. This certain transmission torque is the minimum transmission torque of the coil spring. When the transmitted torque is less than the minimum transmission torque of the coil spring, the coil spring cannot be compressed. At this time, the torque transmission between the single flange and the first cover plate and the second cover plate is equivalent to rigid transmission. The coil spring cannot absorb torque vibration and shock, which is not conducive to improving the noise, vibration and harshness (NVH) of the entire vehicle.

[0004] In order to solve this problem, a pre-damper 30 is usually provided in the torsional vibration damping device. Figure 1 As shown, a pre-damper 30 is typically installed at the torsional vibration damper to damp the transmitted torque when it is less than the minimum transmittable torque of the coil spring and the coil spring cannot be compressed. However, existing pre-damper structures are relatively complex and have many components, resulting in high costs and occupying a large axial space.

[0005] In addition, if Figure 2 and Figure 3 As shown, the structure currently used to limit the axial displacement of the hub is usually a diaphragm spring 40 or a wave pad 50. These components are not only expensive in themselves, but also when used with the existing pre-damper, they will further increase the axial space occupied by the torsional vibration damper, which is contrary to the requirement of compact design of the torque vibration damping device. Utility Model Content

[0006] In order to overcome the problems existing in the related art, the present disclosure provides a torsional vibration damper.

[0007] According to a first aspect of an embodiment of the present disclosure, the present disclosure provides a torsional vibration damper, comprising: a wheel hub, a radial outer wall of which is provided with an external gear; a single flange, a radial inner end of which includes an internal tooth groove, the single flange being sleeved on the outside of the wheel hub, the internal tooth groove being meshed with the external gear, and a circumferential tooth gap being present between the internal tooth groove and the external gear; and elastic spokes, the radial outer end of the elastic spokes being fixedly connected to the single flange, and when the single flange and the wheel hub rotate relative to each other within the range of the tooth gap, the elastic spokes are elastic so as to absorb the torsional vibration between the single flange and the wheel hub.

[0008] In some embodiments, the elastic spokes are circular, including: an inner ring, which is fixedly connected to the hub; an outer ring, which is fixedly connected to the single flange; and a plurality of spokes, which are radially connected between the inner ring and the outer ring.

[0009] In some embodiments, each of the spokes is in the shape of a long straight rod.

[0010] In some embodiments, a connecting block is provided on the radial inner side of the outer ring and between two adjacent spokes, and the connecting block is provided with a first connecting hole. A first fastener passes through the first connecting hole to fix the outer ring of the elastic spoke to the single flange.

[0011] In some embodiments, the inner ring is provided with an axially extending second connecting hole, and a second fastener passes through the second connecting hole to fix the inner ring of the elastic spoke to the hub.

[0012] In some embodiments, the stiffness of the elastic spokes is determined by the diameter of the inner ring, the diameter of the outer ring, the circumferential width of the spokes, and the number of the spokes.

[0013] In some embodiments, a plurality of the elastic spokes are provided, and the plurality of the elastic spokes are stacked along the axial direction.

[0014] In some embodiments, a radially protruding limiting connecting plate is provided on one axial side of the wheel hub, and the radial inner end of the elastic spoke is fixedly connected to the axial side of the limiting connecting plate of the wheel hub.

[0015] In some embodiments, the radial inner end of the single flange is recessed toward the other axial side and forms an accommodating cavity. When the wheel hub is installed from one axial side of the single flange and abuts against the radial inner end of the single flange, the limiting connecting plate of the wheel hub is located in the accommodating cavity. The limiting connecting plate is flush with the end face of the axial side of the wheel hub and is also flush with the axial side of the single flange.

[0016] In some embodiments, a avoidance hole is provided at the radial inner end of the single flange at the accommodating cavity, and the avoidance hole is circumferentially located between the two inner tooth grooves, and the avoidance hole allows a second fastener that fixes the hub and the elastic spoke to pass through.

[0017] The technical solutions provided by the embodiments of the present disclosure may have the following beneficial effects:

[0018] First, there is a tooth gap between the inner tooth groove of the single flange and the outer gear of the hub. When the single flange rotates relative to the hub within the tooth gap, the elastic spokes are elastic, which can allow the single flange and the hub to rotate relative to each other, playing a pre-damping role, avoiding direct collision between the inner tooth groove and the outer gear, and improving NVH performance.

[0019] Secondly, the radial outer end and radial outer end of the elastic spoke are fixedly connected to the single flange and the hub, thereby limiting the relative axial position between the hub and the single flange, and omitting the components used in the related technology to use diaphragm springs or wave washers to limit the axial displacement of the hub. This not only reduces the number of parts and reduces costs, but also the elastic spoke has a simple and compact structure and occupies less axial space. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0021] Figure 1 It is a schematic diagram of the position structure of the damper in the prior art;

[0022] Figure 2 It is a schematic diagram of the position structure of the diaphragm spring in the prior art;

[0023] Figure 3 It is a schematic diagram of the position structure of the wave pad in the prior art;

[0024] Figure 4 is a cross-sectional view of a torque vibration reduction device according to an exemplary embodiment;

[0025] Figure 5 yes Figure 4 Schematic diagram of the partial structure of the torsional vibration damper;

[0026] Figure 6 It is a three-dimensional schematic diagram of the assembly of the elastic spokes and the hub;

[0027] Figure 7 It is a three-dimensional schematic diagram of the assembly of the elastic spokes and the single flange;

[0028] Figure 8It is a three-dimensional schematic diagram of the assembled single flange, hub and elastic spokes;

[0029] Figure 9 It is a side view of the assembled single flange, hub and elastic spokes;

[0030] Figure 10 It is an exploded view of the assembly of a single flange, hub and elastic spokes;

[0031] Figure 11 This is a schematic diagram of the tooth clearance between the external gear of the hub and the internal tooth groove of the single flange. DETAILED DESCRIPTION

[0032] Exemplary embodiments will be described in detail herein, with examples illustrated in the accompanying drawings. In the following description, when referring to the drawings, identical numerals in different figures represent identical or similar elements, unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all possible embodiments consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.

[0033] In this disclosure, unless otherwise specified, the axial direction A, radial direction R, and circumferential direction W refer to the axial direction A, radial direction R, and circumferential direction W of the torque damping device 100, respectively; the axial side refers to Figure 5 The right side of the axis refers to Figure 5 The left side of the radial direction (or radial outer end) refers to the radial direction R away from Figure 4 On the side of the central axis O ( Figure 4 The radial inner side (or radial inner end) refers to the side close to the central axis O in the radial direction R ( Figure 4 the lower side of the center).

[0034] In addition, a "torque-transmitting connection" refers to the ability to transmit driving force / torque between two components. These two components can be directly connected or through various transmission mechanisms or connection structures to achieve the above function. The term "torsion-resistant connection" refers to the connection between two elements in a manner that prevents rotation relative to each other. This can be achieved through a press fit (i.e., an interference fit) or by forming the two components in an integral manner. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0035] like Figure 4 As shown, the present disclosure provides a torque vibration damping device 100, which is a device arranged between an engine and a transmission, and is used to transmit torque between the engine (not shown) and the transmission or a gearbox (not shown) and reduce torsional vibration or torsional shock when transmitting torque.

[0036] The torque damping device 100 may include a torque limiter 10 and a torsional vibration damper 20. The torque limiter 10 is used to transmit torque between the engine and the transmission that does not exceed a predetermined torque, thereby preventing excessive torque from being transmitted between the engine and the transmission, which could damage the engine or transmission. The torsional vibration damper 20 can reduce torsional vibration or torsional shock during torque transmission between the engine and the transmission. Thus, the torque limiter 10 and the torsional vibration damper 20 provide the torque damping device 100 with both torque limiting and torque damping functions.

[0037] In this embodiment, the torque limiter 10 is located radially outside the torsional vibration damper 20. Figure 1 As shown, the torque limiter 10 includes a retaining plate 11, two friction plates 12, a support plate 13, a diaphragm spring 14, a first cover plate 15 and a second cover plate 16. The radial inner side of the retaining plate 11 is clamped between the two friction plates 12, the two friction plates 12 are clamped between the first cover plate 15 and the support plate 13, and the diaphragm spring 14 abuts axially A between the support plate 13 and the second cover plate 16.

[0038] The engine rotates and transmits torque to the retaining plate 11, which generates relative rotation or rotation tendency in the circumferential direction W. Due to the axial compression of the diaphragm spring 14, friction is generated on the contact surface between the radial inner side of the retaining plate 11 and the two friction plates 12. Friction is also generated on the contact surfaces between the two friction plates 12 and the first cover plate 15 and the support plate 13 respectively.

[0039] After receiving the torque transmitted by the engine, the radial outer side of the retaining plate 11 transmits the torque to the two friction plates 12 through friction force. The two friction plates 12 then transmit the torque to the first cover plate 15 through friction force. The first cover plate 15 and the second cover plate 16 are connected in a torsionally anti-connected manner through multiple fixing bolts arranged along the circumferential direction W to transmit the torque.

[0040] If the torque received by the radially outer side of the retaining plate 11 exceeds the maximum torque between the two friction plates 12 and the retaining plate 11, slippage will occur at the contact surface between the two friction plates 12 and the retaining plate 11, preventing the torque from being transmitted to the torsional vibration damper 20 (i.e., the damper). The maximum torque is the maximum torque provided by the maximum friction force exerted by the diaphragm spring 14 axially pressing the two friction plates 12 and the retaining plate 11. The maximum torque can be adjusted by adjusting the pressing force of the diaphragm spring 14 and / or the friction coefficient of the two friction plates 12 and / or the retaining plate 11.

[0041] Therefore, the torque limiter 10 transmits a preset range of torque to the retaining plate 11 , and excessive torque cannot be transmitted to the damper due to slippage between the two friction plates 12 and the retaining plate 11 , so as to protect the engine or transmission from damage.

[0042] Furthermore, the torsional vibration damper 20 includes a single flange 21, a coil spring 22 and a hub 23. The single flange 21 has a first window for accommodating the coil spring 22. The single flange 21 is axially located between the first cover plate 15 and the second cover plate 16. The first cover plate 15 and the second cover plate 16 are provided with a second window for accommodating the coil spring 22 at a position corresponding to the first window.

[0043] When the engine transmits torque to the transmission in the forward direction, the first cover plate 15 and the second cover plate 16 rotate after receiving the torque, compressing the coil spring 22 through the circumferential inner wall of the second window. The coil spring 22 is compressed and drives the single flange 21 to rotate through the first window of the single flange 21. The single flange 21 is torsionally connected to the wheel hub 23. The single flange 21 then transmits the torque to the wheel hub 23 and the input shaft of the transmission, ultimately realizing the torque transmission from the engine to the transmission.

[0044] When the transmission transmits torque to the engine in reverse, the input shaft of the transmission drives the wheel hub 23 to rotate, and the wheel hub 23 drives the single flange 21 to rotate. The single flange 21 compresses the coil spring 22 through the inner wall of the first window. The coil spring 22 is compressed and drives the first cover plate 15 and the second cover plate 16 to rotate through the second window. The first cover plate 15 and the second cover plate 16 transmit the torque to the retaining plate 11 through friction, ultimately realizing the torque transmission from the transmission to the engine.

[0045] Furthermore, it can be seen from the above that when transmitting torque in the forward direction or the reverse direction, the torque is transmitted between the single flange 21 and the first cover plate 15 and the second cover plate 16 by compressing the coil spring 22. When the transmitted torque is less than the minimum transmission torque of the coil spring 22 and the coil spring 22 cannot be compressed, a pre-damper is usually provided in the torsional vibration damping device, which is used to transmit and reduce the torque transmitted.

[0046] For this reason, Figures 5 to 10 As shown, the torsional vibration damper 20 provided by the present disclosure also includes elastic spokes 24, which can function as pre-damper. Specifically, the radial outer wall of the hub 23 is provided with an external gear 231, and the radial inner end of the single flange 21 is provided with an internal tooth groove 211. The single flange 21 is mounted on the outside of the hub 23. The internal tooth groove 211 of the single flange 21 meshes with the external gear 231 of the hub 23, thereby establishing a torsional connection between the single flange 21 and the hub 23.

[0047] like Figure 11As shown, there is a circumferential tooth gap 212 between the inner tooth groove 211 and the outer gear 231. When the single flange 21 is about to transmit torque to the hub 23, or the hub 23 is about to transmit torque to the single flange 21, the single flange 21 and the hub 23 first rotate relative to each other within the circumferential range of the tooth gap 212, until the inner wall of the inner tooth groove 211 of the single flange 21 and the outer wall of the outer gear 231 of the hub 23 touch each other, and then the single flange 21 and the hub 23 are able to transmit torque to each other.

[0048] Among them, Figure 8 As shown, the radial outer end of the elastic spoke 24 is fixedly connected to the single flange 21, and the radial outer end of the elastic spoke 24 can rotate together with the single flange 21, and the radial inner end of the elastic spoke 24 is fixedly connected to the wheel hub 23, and the radial inner end of the elastic spoke 24 can rotate together with the wheel hub 23.

[0049] When the single flange 21 and the wheel hub 23 rotate relative to each other, it is equivalent to the radial outer end and the radial inner end of the elastic spoke 24 rotating relative to each other. The elastic spoke 24 is elastic and can absorb vibration and impact while transmitting torque. In particular, when the transmitted torque is less than the minimum transmission torque that the coil spring 22 can be compressed, the elastic spoke 24 can act as a pre-damper. It can also avoid direct rigid collision between the inner wall of the inner tooth groove 211 and the outer wall of the outer gear 231 when the single flange 21 and the wheel hub 23 transmit torque, especially when they rotate relative to each other within the range of the tooth gap 212, thereby reducing noise and wear, improving the NVH performance of the vehicle, and extending the life of the single flange 21 and / or the wheel hub 23.

[0050] In addition, if Figure 9 As shown, the radial outer end and the radial inner end of the elastic spoke 24 are fixedly connected to the single flange 21 and the hub 23 respectively, and the elastic spoke 24 is located on the same side of the single flange 21 and the hub 23 (i.e. Figure 9 The right side as shown, close to the position of the second cover plate, thereby limiting the relative axial position between the hub 23 and the single flange 21, omitting the components used in the related art to use diaphragm springs or wave washers to limit the axial displacement of the hub 23, which not only reduces the number of parts and reduces costs, but also the elastic spokes 24 have a simple and compact structure and occupy less axial space.

[0051] In some embodiments, the elastic spokes 24 can be composed of multiple independent rod-like structures, and the radial outer ends and radial inner ends of the multiple independent rod-like structures are fixedly connected to the single flange 21 and the hub 23 respectively. The elastic spokes 24 are elastic, thereby acting as a pre-damper.

[0052] In this embodiment, if Figure 8As shown, the elastic spoke 24 is circular, and includes an inner ring 241, an outer ring 242, and a plurality of spokes 243 radially connected between the inner ring 241 and the outer ring 242. Figure 8 As can be seen, the elastic spokes 24 can be integrally formed, which not only increases the strength of the entire elastic spoke 24 but also simplifies its structure, reducing the number of parts. This integral molding reduces the complexity of the production and assembly processes, improving production efficiency and reliability. Furthermore, the radial distribution of the multiple spokes 243 between the inner ring 241 and the outer ring 242 ensures uniform force distribution and avoids localized stress concentration.

[0053] The inner ring 241 is fixedly connected to the hub 23, while the outer ring 242 is fixedly connected to the single flange 21. This strengthens the connection between the elastic spokes 24, the single flange 21, and the hub 23, preventing fracture and failure at the connection caused by long-term torque fatigue. When the single flange 21 and hub 23 rotate relative to each other, the radial ends of the multiple spokes 243 rotate synchronously with the outer ring 242 or inner ring 241, thereby ensuring a more uniform vibration reduction effect of the elastic spokes 24 in the circumferential direction W.

[0054] In this embodiment, each spoke 243 is in the shape of a long straight rod. Therefore, whether the single flange 21 is transmitting torque in the forward direction to the hub 23 or the hub 23 is transmitting torque in the reverse direction to the single flange 21, the elastic spoke 24 has the same torque-damping effect. This design of spokes 243 is suitable for applications requiring bidirectional and uniform vibration damping.

[0055] In some embodiments, as Figure 6 As shown, a connecting block 244 is provided on the radial inner side of the outer ring 242 and between two adjacent spokes 243. The connecting block 244 is provided with a first connecting hole 245 and a first fastener 246 (as shown in FIG. Figure 7 As shown in FIG. 2 , the outer ring 242 of the elastic spoke 24 is fixedly connected to the single flange 21 through the first connecting hole 245 .

[0056] By providing the connecting block 244 and drilling holes therein, direct drilling of holes in the outer ring 242 is avoided, thereby maintaining the strength of the outer ring 242. Furthermore, the connecting block 244 is located radially inward of the outer ring 242 and between two adjacent spokes 243, taking up no additional radial or axial space. This not only ensures a secure connection but also optimizes the spatial layout of the entire elastic spoke 24.

[0057] In some embodiments, as Figure 7 As shown, the inner ring 241 is provided with a second connecting hole 247 which is axially extending, and a second fastener 248 (such as Figure 6As shown in the figure, the inner ring 241 of the elastic spoke 24 is fixedly connected to the hub 23 through the second connecting hole 247, thereby ensuring the connection strength between the inner ring 241 and the hub 23 and improving the reliability and durability of the entire torsional vibration damper 20.

[0058] The first fastener 246 and the second fastener 248 may be single-head or double-head bolts or screws or rivets.

[0059] In some embodiments, the stiffness of the elastic spokes 24 is determined by the diameter of the inner ring 241 , the diameter of the outer ring 242 , the circumferential width of the spokes 243 , and the number of the spokes 243 .

[0060] When the width of the spoke 243 remains unchanged, the larger the diameter of the outer ring 242, the smaller the diameter of the inner ring 241, so that the radial length of the spoke 243 is longer, thereby reducing the stiffness of the entire elastic spoke 24; similarly, the smaller the diameter of the outer diameter, the larger the diameter of the inner ring 241, and the smaller the radial length of the spoke 243, thereby increasing the stiffness of the entire elastic spoke 24.

[0061] Wider spokes 243 have a larger cross-sectional area, capable of withstanding greater forces, thereby increasing rigidity. A greater number of spokes 243 also disperses the transmitted torque, reducing the stress on each spoke 243 and thereby increasing overall rigidity. Therefore, the wider the circumferential width of the spokes 243 and the greater the number of spokes 243, the greater the rigidity of the elastic spokes 24.

[0062] It should be noted that the diameter size of the outer ring 242 and the inner ring 241 and the width and number of the spokes 243 may lead to increased material costs, increased weight and increased space occupancy. Therefore, it is necessary to find a balance in terms of stiffness, cost and spatial layout. It is necessary to comprehensively consider space limitations, cost and stiffness requirements to adjust the size of the outer ring 242 and the inner ring 241 and the width and number of the spokes 243 of the elastic spoke 24.

[0063] The stiffness of the elastic spokes 24 can be controlled by adjusting the diameter of the inner ring 241, the diameter of the outer ring 242, the circumferential width of the spokes 243, and the number of spokes 243. In addition, the vibration reduction effect can be further adjusted by changing the number of elastic spokes 24. In some embodiments, multiple elastic spokes 24 can be provided, and multiple elastic spokes 24 can be stacked along the axial direction. In this embodiment, as shown in FIG. Figure 9 and Figure 10As shown, three elastic spokes 24 can be provided, and the same first fastener 246 simultaneously passes through the first connection holes 245 of the outer rings 242 of all elastic spokes 24 and is fixedly connected to the single flange 21. The same second fastener 248 simultaneously passes through the second connection holes 247 of the inner rings 241 of all elastic spokes 24 and is fixedly connected to the hub 23. Using the same fastener to connect multiple elastic spokes 24 simplifies the installation process, reduces the number of parts, and improves assembly efficiency.

[0064] At the same time, stacking multiple elastic spokes 24 significantly increases the stiffness of the overall pre-damper. Each elastic spoke 24 provides additional support, making the overall pre-damper more stable. Stacking multiple elastic spokes 24 better distributes the transmitted torque, reduces the stress on each elastic spoke 24, and prolongs its service life. By increasing or decreasing the number of elastic spokes 24, the system's stiffness and vibration damping performance can be flexibly adjusted to meet the needs of different applications.

[0065] In some embodiments, a radially protruding limiting connecting plate 232 is provided on one axial side of the hub 23 , and the radial inner end of the elastic spoke 24 is fixedly connected to the axial side of the limiting connecting plate 232 of the hub 23 .

[0066] On the one hand, providing connection holes in the limiting connection plate 232 avoids directly drilling holes in the hub 23, maintaining the overall strength of the hub 23 and facilitating efficient torque transmission. On the other hand, while maintaining the dimensions of the radially outer ends of the elastic spokes 24 (e.g., the outer ring 242) , the radial spacing between the radially inner and radially outer ends of the elastic spokes 24 can be made smaller, thereby reducing the radial length of the spokes 243. The shorter radial length of the spokes 243 reduces the deformation of the spokes 243, increases their stiffness, and thus increases the stiffness of the entire elastic spoke 24.

[0067] In some embodiments, as Figure 5 and Figure 9 As shown, the radial inner end of the single flange 21 is recessed toward the other axial side and forms an accommodating cavity 213. When the hub 23 is installed from the axial side of the single flange 21 and abuts against the radial inner end of the single flange 21, the limiting connecting plate 232 of the hub 23 is located in the accommodating cavity 213. The limiting connecting plate 232 is flush with the end face of the axial side of the hub 23 and is also flush with the axial side of the single flange 21.

[0068] The radial inner end of the elastic spoke 24 abuts against one axial side of the limiting connecting plate 232 of the hub 23, and the radial inner end of the single flange 21 abuts against the other axial side of the limiting connecting plate 232. It can be seen that the limiting connecting plate 232 of the hub 23 is axially clamped between the radial inner end of the single flange 21 and the radial inner end of the elastic spoke 24, thereby limiting the axial position of the hub 23.

[0069] The radial inner end of the single flange 21 accommodates the limiting connecting plate 232 of the hub 23 through the accommodating cavity 213, which fully utilizes the axial space and reduces the additional occupation of the axial space.

[0070] In addition, the elastic spokes 24 are located on the same side (axial side, Figure 4 and Figure 9 The right side of the wheel hub 23 is provided with a limit connecting plate 232, and the limit connecting plate 232 is flush with the axial side of the wheel hub 23 and the axial side of the single flange 21, so that the radial outer end of the elastic spoke 24 and the inner ring 241 can be in the same plane, simplifying the structure of the elastic spoke 24 and facilitating installation and maintenance.

[0071] In some embodiments, as Figure 9 and Figure 11 As shown, a avoidance hole 214 is provided at the accommodating cavity 213 at the radial inner end of the single flange 21. The avoidance hole 214 is circumferentially located between the two inner tooth grooves 211. The avoidance hole 214 allows the second fastener 248 for fixing the hub 23 and the elastic spoke 24 to pass through.

[0072] The avoidance hole 214 allows the second fastener 248 to be a rivet or stud bolt, that is, a nut can be screwed into both ends of the screw for fastening. The avoidance hole 214 allows the second fastener 248 to be inserted from one axial side of the elastic spoke 24 or from the other axial side of the single flange 21, providing more installation possibilities.

[0073] Among them, Figure 11 As shown, the circumferential width of the clearance hole 214 is greater than the width of the screwed-in nut. The width difference between the clearance hole 214 and the nut can be greater than or equal to the tooth clearance 212 between the internal tooth groove 211 of the single flange 21 and the external gear 231 of the hub 23. This not only does it not affect the relative rotation of the single flange 21 and the hub 23 within the tooth clearance 212, but also enhances the torque transmission strength between the single flange 21 and the hub 23 through the abutment of the bolts with the clearance hole 214.

[0074] It is understood that in this disclosure, "plurality" refers to two or more than two, and other quantifiers are similar. "And / or" describes the association relationship of related objects, indicating that three relationships may exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the related objects before and after are in an "or" relationship. The singular forms "a", "the" and "the" are also intended to include the plural forms, unless the context clearly indicates otherwise.

[0075] It will be further understood that the terms "first," "second," and the like are used to describe various structures, but these structures should not be limited to these terms. These terms are merely used to distinguish structures of the same type from one another and do not indicate a particular order or degree of importance. In fact, the expressions "first," "second," and the like are fully interchangeable. For example, a first structure could also be referred to as a second structure, and similarly, a second structure could also be referred to as a first structure without departing from the scope of this disclosure.

[0076] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the utility model disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art not disclosed herein. The description and examples are to be considered merely as exemplary, and the true scope and spirit of the present disclosure are indicated by the following claims.

[0077] It should be understood that the present disclosure is not limited to the exact structures described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the scope of the appended claims.

Claims

1. A torsional vibration damper (20), characterized in that: include: A hub (23) having an external gear (231) provided on its radial outer wall; a single flange (21), the radial inner end of which includes an inner tooth groove (211), the single flange (21) being sleeved on the outside of the hub (23), the inner tooth groove (211) being meshed with the outer gear (231), and a tooth gap (212) in the circumferential direction (W) existing between the inner tooth groove (211) and the outer gear (231); and Elastic spokes (24), wherein the radial outer ends of the elastic spokes (24) are fixedly connected to the single flange (21), and the radial inner ends of the elastic spokes (24) are fixedly connected to the wheel hub (23); when the single flange (21) and the wheel hub (23) rotate relative to each other within the range of the tooth gap (212), the elastic spokes (24) are elastic so as to absorb torsional vibration between the single flange (21) and the wheel hub (23).

2. The torsional vibration damper (20) according to claim 1, characterized in that The elastic spokes (24) are circular and include: an inner ring (241), wherein the inner ring (241) is fixedly connected to the wheel hub (23); an outer ring (242), the outer ring (242) being fixedly connected to the single flange (21); and A plurality of spokes (243) are radially connected between the inner ring (241) and the outer ring (242).

3. The torsional vibration damper (20) according to claim 2, characterized in that Each of the spokes (243) is in the shape of a long straight rod.

4. The torsional vibration damper (20) according to claim 2, characterized in that A connecting block (244) is provided on the radial inner side of the outer ring (242) and between two adjacent spokes (243). The connecting block (244) is provided with a first connecting hole (245). A first fastener (246) passes through the first connecting hole (245) to fix the outer ring of the elastic spoke (24) to the single flange (21).

5. The torsional vibration damper (20) according to claim 2, characterized in that The inner ring (241) is provided with an axially penetrating second connection hole (247), and a second fastener (248) passes through the second connection hole (247) to securely connect the inner ring (241) of the elastic spoke (24) to the hub (23).

6. The torsional vibration damper (20) according to claim 2, characterized in that The rigidity of the elastic spokes (24) is determined by the diameter of the inner ring (241), the diameter of the outer ring (242), the circumferential width of the spokes (243), and the number of the spokes (243).

7. The torsional vibration damper (20) according to claim 2, characterized in that A plurality of the elastic spokes (24) are provided, and the plurality of elastic spokes (24) are stacked along the axial direction.

8. The torsional vibration damper (20) according to claim 1, characterized in that A radially protruding limiting connecting plate (232) is provided on one axial side of the wheel hub (23), and the radial inner end of the elastic spoke (24) is fixedly connected to the axial side of the limiting connecting plate (232) of the wheel hub (23).

9. The torsional vibration damper (20) according to claim 8, characterized in that The radial inner end of the single flange (21) is recessed toward the other axial side to form an accommodating cavity (213); when the wheel hub (23) is installed from one axial side of the single flange (21) and abuts against the radial inner end of the single flange (21), the limiting connecting plate (232) of the wheel hub (23) is located in the accommodating cavity (213); the limiting connecting plate (232) is flush with the end surface of the axial side of the wheel hub (23) and is also flush with the axial side of the single flange (21).

10. The torsional vibration damper (20) according to claim 9, characterized in that A radial inner end of the single flange (21) is provided with an escape hole (214) at the accommodating cavity (213), the escape hole (214) being located between the two inner tooth grooves (211) along the circumferential direction (W), and the escape hole (214) allowing a second fastener (248) for fixedly connecting the hub (23) and the elastic spoke (24) to pass through.

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