Torque limiting and vibration reducing system for flywheel

Abstract

The utility model discloses a flywheel torque-limiting vibration-damping system, which comprises a flywheel module, a torque-limiting module and a vibration-damping module, the torque-limiting module comprises a pressure plate cover, the edge of the pressure plate cover and the edge of the flywheel module are connected into a whole, and the vibration-damping module is arranged between the pressure plate cover and the flywheel module. And the motor is positioned on the inner side of the flywheel module. The edge of the pressure plate cover and the edge of the flywheel module are connected into a whole, so that the whole torque limiting module expands outwards in the circumferential direction, the internal space of the flywheel is increased, the vibration reduction module can be located on the inner side of the flywheel module, the axial space is saved, arrangement in an engine compartment is facilitated, and the vibration reduction effect is improved. The device can be applied to a small space of a hybrid power system. On the premise that the same function is achieved, the number of parts is reduced, the material grade of the parts is lowered, light weight is achieved, and meanwhile cost is lowered.

Description

Technical Field

[0001] The utility model relates to the technical field of vibration reduction devices, and in particular to a flywheel torque limiting vibration reduction system. Background Art

[0002] The traditional split flywheel torque limiting damper is to divide the flywheel and the torque limiting damper into two parts, and fix the torque limiting damper to the flywheel by bolts. The traditional solution has a large number of parts, and the damping module is set on the outside of the flywheel, resulting in a large axial dimension. In addition, due to the limited space size, the outer diameter of the damping spring is small, and greater stiffness is required to achieve vibration reduction, so there are two inner and outer spring groups, making the damping spring structure more complex and stiffer. In addition, during the assembly of the whole vehicle, the flywheel needs to be installed on the crankshaft first, and then the torque limiting damper is installed on the flywheel. The process is complicated and difficult to operate.

[0003] Therefore, it is necessary to design a flywheel torque limiting and vibration reduction system with a compact structure, a small number of parts, and a simplified installation process. Utility Model Content

[0004] The utility model aims to overcome the deficiencies of the prior art and provide a flywheel torque limiting and vibration reduction system with a compact structure, a small number of parts and a simplified installation process.

[0005] The technical solution of the utility model provides a flywheel torque limiting and vibration reduction system, comprising a flywheel module, a torque limiting module and a vibration reduction module, the torque limiting module comprising a pressure plate cover, the edge of the pressure plate cover is integrally connected to the edge of the flywheel module, the vibration reduction module is installed between the pressure plate cover and the flywheel module, and is located on the inner side of the flywheel module.

[0006] Furthermore, the vibration reduction module includes a fixed plate, a spline hub, a damping assembly, a vibration reduction spring, a flange and a torque transmission plate. There are at least two fixed plates. The spline hub, the damping assembly, the flange and the torque transmission plate are installed between the two fixed plates. A plurality of vibration reduction springs are installed on the flange. The spline hub is installed on the inner side of the flange. The flange and the spline hub are designed separately.

[0007] Furthermore, the flange is provided with a first spring groove, the fixing plate is provided with a second spring groove, the first spring groove corresponds to the second spring groove, and the damping spring is installed in the first spring groove and the second spring groove.

[0008] The inclination angles of the left and right sides of the second spring groove are greater than the inclination angles of the left and right sides of the first spring groove.

[0009] Further, the damping assembly includes a primary damping ring, a secondary damping ring, a secondary damping ring backing plate, a secondary damping friction washer, a secondary damping disc spring and a primary damping disc spring;

[0010] There are at least two primary damping rings and at least two secondary damping rings, wherein a set of the primary damping rings and the secondary damping rings are assembled on one side of the flange;

[0011] Another set of the primary damping ring and the secondary damping ring is assembled on the other side of the flange, the primary damping ring on this side is installed with the primary damping disc spring, and the secondary damping ring on this side is installed with the secondary damping ring pad, the secondary damping friction washer and the secondary damping disc spring in sequence;

[0012] The primary damping ring, the secondary damping ring and the secondary damping friction washer cooperate with the fixing plate and rotate along with the fixing plate; the secondary damping ring pad cooperates with the flange and rotates along with the flange.

[0013] Furthermore, the torque transmission disc is installed between the two torque limiting friction plates of the torque limiting module, and is connected between the two fixing plates.

[0014] Furthermore, in the initial state, the punching hole of the flange and the flap of the secondary damping ring pad are in clearance fit;

[0015] When the gap is overcome, the secondary damping ring pad rotates with the flange, rubs with the secondary damping friction washer and the secondary damping ring, and generates second-order damping. Further, the flywheel module includes a flexible disk and an inertia ring, the pressure plate cover is tightly connected to the edge of the inertia ring, and the vibration reduction module is installed on the inner side of the inertia ring.

[0016] Furthermore, the torque limiting module also includes a torque limiting disc spring, a pressure plate and a torque limiting friction plate. The torque limiting disc spring, the pressure plate and the torque limiting friction plate are coaxially overlapped and arranged, and the pressure plate is connected to the pressure plate cover.

[0017] Furthermore, a plurality of protrusions are provided on the edge of the pressure plate, and a plurality of slots corresponding to the protrusions are provided on the pressure plate cover, and the protrusions are inserted into the slots.

[0018] Furthermore, the edge of the pressure plate cover is tightly connected to the edge of the flywheel module.

[0019] After adopting the above technical solution, the following beneficial effects are achieved:

[0020] In some embodiments of the utility model, the edge of the pressure plate cover is connected to the edge of the flywheel module as a whole, so that the entire torque limiting module is expanded outward along the circumferential direction, the space inside the flywheel is increased, and the vibration reduction module can be located inside the flywheel module, saving axial space, facilitating the arrangement in the engine compartment, and can be applied to the small space of the hybrid system. Under the premise of achieving the same function, the number of parts is reduced, the material grade of the parts is lowered, and the cost is reduced while achieving lightweight.

[0021] Some embodiments of the utility model integrate first-order and second-order damping, which can fully cover the vibration reduction NVH requirements of different engine operating conditions; through innovative structural design, the problem of infinite stiffness at the zero point is solved, and the risk of NVH issues in start-stop of hybrid vehicles is reduced; through innovative structural design, the spline hub and flange are designed separately, with self-aligning function, which can compensate for the eccentricity between the transmission input shaft and the center line of the engine crankshaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The disclosure of the present invention will become easier to understand with reference to the accompanying drawings. It should be understood that these drawings are only for illustrative purposes and are not intended to limit the scope of protection of the present invention. In the drawings:

[0023] Figure 1 It is a three-dimensional diagram of a flywheel torque limiting and vibration reduction system in one embodiment of the utility model;

[0024] Figure 2 is a cross-sectional view of a flywheel torque limiting and vibration reduction system in one embodiment of the utility model;

[0025] Figure 3 It is an exploded diagram of a flywheel torque limiting and vibration reduction system in one embodiment of the utility model;

[0026] Figure 4 It is an exploded view of a flywheel module, a torque limiting module and a vibration reduction module in one embodiment of the utility model;

[0027] Figure 5 is an exploded view of a vibration reduction module in one embodiment of the utility model;

[0028] Figure 6 It is a schematic diagram of a flange and a secondary damping ring pad in one embodiment of the utility model;

[0029] Figure 7 It is a schematic diagram of a flywheel torque limiting and vibration reduction system in one embodiment of the utility model;

[0030] Figure 8 yes Figure 7 A partial enlarged view of point B in the middle.

[0031] Reference table of reference numerals:

[0032] Flywheel module 1: flexible disk 11, inertia ring 12;

[0033] Torque limiting module 2: torque limiting disc spring 21, pressure plate 22, torque limiting friction plate 23, pressure plate cover 24, protrusion 221, step surface 241, and slot 242;

[0034] Vibration reduction module 3: fixed plate 31, spline hub 32, damping assembly 33, vibration reduction spring 34, flange 35, torsion plate 36, second spring slot 311, primary damping ring 331, secondary damping ring 332, secondary damping ring pad 333, secondary damping friction washer 334, secondary damping disc spring 335, primary damping disc spring 336, first spring slot 351, punching hole 352, flap 3331. DETAILED DESCRIPTION

[0035] The specific implementation of the utility model is further described below in conjunction with the accompanying drawings.

[0036] It is easy to understand that according to the technical solution of the utility model, without changing the essential spirit of the utility model, a variety of structural modes and implementation modes can be replaced by those skilled in the art. Therefore, the following specific implementation methods and drawings are only exemplary descriptions of the technical solution of the utility model, and should not be regarded as the entirety of the utility model or as a limitation or restriction on the technical solution of the utility model.

[0037] The directional terms such as up, down, left, right, front, back, front, back, top, bottom, etc. mentioned or may be mentioned in this specification are defined relative to the structures shown in the drawings. They are relative concepts and may change accordingly according to different positions and different usage conditions. Therefore, these or other directional terms should not be interpreted as restrictive terms.

[0038] In some embodiments of the present invention, Figure 1-2 As shown, the flywheel torque limiting and vibration reduction system includes a flywheel module 1, a torque limiting module 2 and a vibration reduction module 3. The torque limiting module 2 includes a pressure plate cover 24, the edge of the pressure plate cover 24 is connected to the edge of the flywheel module 1 as a whole, and the vibration reduction module 3 is installed between the pressure plate cover 24 and the flywheel module 1, and is located on the inner side of the flywheel module 1.

[0039] Specifically, Figure 1 As shown, the flywheel torque limiting and vibration reduction system is an oblate structure as a whole, and each module is installed along the same central axis.

[0040] like Figure 2 The figure shows a cross-sectional view of the upper part of the flywheel torque limiting and vibration reduction system. The structure of the lower part is omitted because it is basically the same as the upper part.

[0041] The edge of the inertia ring 12 of the flywheel module 1 is connected to the edge of the pressure plate cover 24 of the torque limiting module 2 as a whole, and can be formed as a whole by welding, bolting, riveting or other fastening connection methods, or other methods. Since the entire torque limiting module 2 is expanded outward in the circumferential direction, the internal space of the flywheel torque limiting vibration reduction system is increased, so that the vibration reduction module 3 can be located on the inner side of the flywheel module 1, saving axial space, facilitating the arrangement in the engine compartment, and can be applied to the small space of the hybrid system. On the premise of achieving the same function, the number of parts is reduced, the material grade of the parts is lowered, and the cost is reduced while achieving lightweight.

[0042] In addition, since the entire torque limiting module 2 expands outward in a circumferential direction, a smaller friction force can achieve the same torque limit, and the material grade of the torsion limiting disc spring and the friction plate can be reduced accordingly; at the same time, the arrangement range of the vibration damping spring is increased, the torsion angle of the vibration damping spring is increased, and the stiffness of the vibration damping spring is reduced, thereby achieving a better vibration damping function.

[0043] Furthermore, if Figure 2-3 As shown, the flywheel module 1 includes a flexible disk 11 and an inertia ring 12 , the pressure plate cover 24 is fastened to the edge of the inertia ring 12 by welding or the like, and the vibration reduction module 3 is mounted on the inner side of the inertia ring 12 .

[0044] Specifically, Figure 3 As shown, the flexible disk 11 is a circular disk structure, which is fastened to one side of the inertia ring 12 by welding or the like, and the inertia ring 12 is a circular ring structure.

[0045] like Figure 2 As shown, the maximum diameter of the outer edge of the pressure plate cover 24 is equal to the diameter of the inertia ring 12, and the outer edge of the pressure plate cover 24 forms a step surface 241, and the step surface 241 is fastened to the outer edge of the inertia ring 12 by welding or the like.

[0046] Furthermore, if Figure 3-4 As shown, the torque limiting module 2 also includes a torque limiting disc spring 21 , a pressure plate 22 and a torque limiting friction plate 23 . The torque limiting disc spring 21 , the pressure plate 22 and the torque limiting friction plate 23 are coaxially overlapped and the pressure plate 22 is connected to a pressure plate cover 24 .

[0047] The pressure plate cover 24 is welded and fastened to the flywheel module 1, and relies on the torque limiting disc spring 21 to provide a clamping force for the torque limiting module 2, so that the two torque limiting friction plates 23 are tightly pressed between the pressure plate 22 and the pressure plate cover 24, and the torque from the flywheel module 1 is transmitted to the torque limiting friction plates 23 through friction force.

[0048] Furthermore, if Figure 4As shown, the edge of the pressure plate 22 is provided with a plurality of protrusions 221, and the pressure plate cover 24 is provided with a plurality of slots 242 corresponding to the protrusions 221, and the protrusions 221 are inserted into the slots 242. The pressure plate 22 and the pressure plate cover 24 are matched to ensure that the pressure plate 22 will not rotate relative to the pressure plate cover 24; when the torque exceeds the friction torque, the slippage occurs only in the torque limiting friction plate 23. The torque limiting disc spring 21 provides the clamping force by deformation, and when the torque limiting friction plate 23 is worn, the height of the torque limiting disc spring 21 increases to provide the clamping force.

[0049] Furthermore, if Figure 5 As shown, the vibration reduction module 3 includes a fixed plate 31, a spline hub 32, a damping assembly 33, a vibration reduction spring 34, a flange 35 and a torque transmission plate 36. There are at least two fixed plates 31. The spline hub 32, the damping assembly 33, the flange 35 and the torque transmission plate 36 are installed between the two fixed plates 31. A plurality of vibration reduction springs 34 are installed on the flange 35, and the spline hub 32 is installed on the inner side of the flange 35.

[0050] Specifically, Figure 4 As shown, the torque-limiting friction plate 23 is fixed on both sides of the torque transmission plate 36 by rivets, and is placed between the pressure plate 22 and the pressure plate cover 24; the torque transmission plate 36 is fixed between the two torque-limiting friction plates 23 and the fixed plate 31 by rivets at the same time, and the torque from the torque-limiting friction plate 23 is transmitted to the fixed plate 31; the torque-limiting disc spring 21 is between the inertia ring 12 and the pressure plate 22, and the pressure plate cover 24 is fixed to the inertia ring 12 by fastening connections such as welding, and the torque-limiting disc spring 21 is compressed and deformed; the torque-limiting disc spring 21 presses the torque-limiting friction plate 23 tightly between the pressure plate 22 and the pressure plate cover 24 by deformation.

[0051] like Figure 5 As shown, the fixing plate 31 is connected to the torque transmission plate 36 by rivets, and the friction torque provided by the torque limiting module 2 is applied to the four damping springs 34 through the window thereon, and the damping springs 34 transmit the torque to the flange 35, and finally to the spline hub 32. The fixing plate 31 can rotate relatively to the flange 35 because of the spring limit between the fixing plate 31 and the flange 35, and the low stiffness of the damping springs 34 is used to achieve the function of damping.

[0052] Preferably, the flange 35 and the spline hub 32 are designed to be separate and have a self-aligning function, which can compensate for the eccentricity between the transmission input shaft and the center line of the engine crankshaft.

[0053] Furthermore, if Figure 3 As shown, the torque transmission plate 36 is installed between the two torque limiting friction plates 23 and connected between the two fixing plates 31.

[0054] Furthermore, if Figure 3As shown, the damping assembly 33 includes a primary damping ring 331, a secondary damping ring 332, a secondary damping ring backing plate 333, a secondary damping friction washer 334, a secondary damping disc spring 335 and a primary damping disc spring 336;

[0055] There are two primary damping rings 331 and two secondary damping rings 332, one set of primary damping rings 331 and secondary damping rings 332 is assembled on one side of the flange; the other set of primary damping rings 331 and secondary damping rings 332 is assembled on the other side of the flange, the primary damping ring 331 on this side is installed with a primary damping disc spring 336, and the secondary damping ring 332 on this side is installed with a secondary damping ring pad 333, a secondary damping friction washer 334 and a secondary damping disc spring 335 in sequence;

[0056] The primary damping ring 331 , the secondary damping ring 332 and the secondary damping friction washer 334 cooperate with the fixing plate 31 and rotate along with the fixing plate 31 ; the secondary damping ring pad 333 cooperates with the flange 35 and rotates along with the flange 35 .

[0057] A damping system is designed according to the characteristics of relative rotation between the flange 35 and the fixed plate 31. The primary damping ring 331, the secondary damping ring 332 and the secondary damping friction washer 334 cooperate with the fixed plate 31 and rotate with the rotation of the fixed plate 31; the secondary damping ring pad 333 cooperates with the flange 35 and rotates with the rotation of the flange 35. The primary damping disc spring 336 and the secondary damping disc spring 335 provide a pressing force for the damping system and generate damping through relative friction.

[0058] Furthermore, if Figure 6-7 As shown, in the initial state, the punching hole 352 of the flange 35 and the flap 3331 of the secondary damping ring pad 333 are clearance-matched;

[0059] When the gap is overcome, the secondary damping ring pad 333 rotates with the flange 35, rubs against the secondary damping friction washer 334 and the secondary damping ring 332, and generates secondary damping.

[0060] Specifically, the principle of first-order damping generation: when the punching hole 352 of the flange 35 and the flap 3331 of the secondary damping ring pad 333 are still in clearance fit, a damping system is designed according to the characteristics of relative rotation between the flange 35 and the fixed plate 31. The primary damping ring 331 and the secondary damping ring 332 cooperate with the fixed plate 31 and rotate with the rotation of the fixed plate 31; the primary damping disc spring 336 and the secondary damping disc spring 335 provide a clamping force for the damping system, and the first-order damping is generated by the relative friction between the primary damping ring 331 and the spline hub 32, and the relative friction between the secondary damping ring 332 and the flange 35, which is mainly used for the steady-state working condition of the engine.

[0061] The principle of generating second-order damping: when the clearance between the punching hole 352 of the flange 35 and the flap 3331 of the secondary damping ring pad 333 disappears, the secondary damping ring pad 333 rotates with the rotation of the flange 35; the secondary damping friction washer 334 and the secondary damping ring 332 cooperate with the fixed plate 31 and rotate with the rotation of the fixed plate 31. The secondary damping disc spring 335 provides a clamping force for the damping system, and generates second-order damping through the relative friction between the secondary damping friction washer 334, the secondary damping ring 332 and the secondary damping ring pad 333, which is mainly used for the working condition of sudden change of engine speed.

[0062] Furthermore, if Figure 3 and Figure 7-8 As shown, the flange 35 has a first spring groove 351 , and the fixing plate 31 has a second spring groove 311 . The first spring groove 351 corresponds to the second spring groove 311 , and the damping spring 34 is installed in the first spring groove 351 and the second spring groove 311 .

[0063] Since the flange 35 is installed between the two fixing plates 31 , the torque is transmitted through the damping spring 34 installed in the first spring groove 351 of the flange 35 and the second spring grooves 311 of the two fixing plates 31 .

[0064] Furthermore, if Figure 8 As shown, the inclination angle of the left and right sides of the second spring slot 311 is greater than the inclination angle of the left and right sides of the first spring slot 351. For example, the second spring slot 311 is 6 degrees, and the first spring slot 351 is 4 degrees. The upper half of the damping spring 34 installed therein is stretched and the lower half is compressed.

[0065] The flywheel torque limiting and vibration reduction system in the utility model has the following advantages:

[0066] 1. Reduce the number of parts, reduce weight and save costs;

[0067] 2. The integrated torque limiting module and flywheel module increase the axial space and facilitate compact layout;

[0068] 3. Fewer assembly steps, convenient installation, and saving factory installation time;

[0069] 4. The vibration damping spring is arranged at the periphery, which reduces the spring stiffness and has a better vibration damping effect;

[0070] 5. Integrated first-order and second-order damping, which can fully meet the NVH requirements of different engine working conditions;

[0071] 6. The different angles of the left and right sides of the spring slot are designed to solve the problem of infinite zero-point stiffness and reduce the risk of NVH issues in hybrid vehicle start-stop.

[0072] 7. The split design of the spline hub and flange has a self-aligning function, which can compensate for the eccentricity between the transmission input shaft and the center line of the engine crankshaft.

[0073] The above description is only the principle and preferred embodiment of the utility model. It should be pointed out that for ordinary technicians in this field, on the basis of the principle of the utility model, several other variations can be made, which should also be regarded as the protection scope of the utility model.

Claims

1. A flywheel torque limiting and vibration reduction system, comprising a flywheel module, a torque limiting module and a vibration reduction module, characterized in that: The torque limiting module includes a pressure plate cover, the edge of the pressure plate cover is integrally connected to the edge of the flywheel module, and the vibration reduction module is installed between the pressure plate cover and the flywheel module and is located on the inner side of the flywheel module.

2. The flywheel torque limiting and vibration reduction system according to claim 1, characterized in that: The vibration reduction module includes a fixed plate, a spline hub, a damping assembly, a vibration reduction spring, a flange and a torque transmission plate. There are at least two fixed plates. The spline hub, the damping assembly, the flange and the torque transmission plate are installed between the two fixed plates. A plurality of vibration reduction springs are installed on the flange. The spline hub is installed on the inner side of the flange. The flange and the spline hub are designed to be separate parts.

3. The flywheel torque limiting and vibration reduction system according to claim 2, characterized in that: The flange has a first spring groove, the fixing plate has a second spring groove, the first spring groove corresponds to the second spring groove, and the damping spring is installed in the first spring groove and the second spring groove; The inclination angles of the left and right sides of the second spring groove are greater than the inclination angles of the left and right sides of the first spring groove.

4. The flywheel torque limiting and vibration reduction system according to claim 2, characterized in that: The damping assembly comprises a primary damping ring, a secondary damping ring, a secondary damping ring pad, a secondary damping friction washer, a secondary damping disc spring and a primary damping disc spring; There are at least two primary damping rings and at least two secondary damping rings, wherein a set of the primary damping rings and the secondary damping rings are assembled on one side of the flange; Another set of the primary damping ring and the secondary damping ring is assembled on the other side of the flange, the primary damping ring on this side is installed with the primary damping disc spring, and the secondary damping ring on this side is installed with the secondary damping ring backing plate, the secondary damping friction washer and the secondary damping disc spring in sequence; The primary damping ring, the secondary damping ring and the secondary damping friction washer cooperate with the fixing plate and rotate along with the fixing plate; the secondary damping ring pad cooperates with the flange and rotates along with the flange.

5. The flywheel torque limiting and vibration reduction system according to claim 2, characterized in that: The torque transmission disc is installed between the two torque limiting friction plates of the torque limiting module and connected between the two fixing plates.

6. The flywheel torque limiting and vibration reduction system according to claim 4, characterized in that: In the initial state, the punching hole of the flange plate and the flap of the secondary damping ring pad are in clearance fit; When the gap is overcome, the secondary damping ring pad rotates with the flange, rubs against the secondary damping friction washer and the secondary damping ring, and generates secondary damping.

7. The flywheel torque limiting and vibration reduction system according to claim 1, characterized in that: The flywheel module includes a flexible disk and an inertia ring, the pressure plate cover is tightly connected to the edge of the inertia ring, and the vibration reduction module is installed on the inner side of the inertia ring.

8. The flywheel torque limiting and vibration reduction system according to claim 1, characterized in that: The torque limiting module further includes a torque limiting disc spring, a pressure plate and a torque limiting friction plate. The torque limiting disc spring, the pressure plate and the torque limiting friction plate are coaxially overlapped and arranged. The pressure plate is connected to the pressure plate cover.

9. The flywheel torque limiting and vibration reduction system according to claim 8, characterized in that: The edge of the pressure plate is provided with a plurality of protrusions, and the pressure plate cover is provided with a plurality of slots corresponding to the protrusions, and the protrusions are inserted into the slots.

10. The flywheel torque limiting and vibration reduction system according to any one of claims 1 to 9, characterized in that: The edge of the pressure plate cover is tightly connected to the edge of the flywheel module.

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