Shock absorber assembly, range extending system, and vehicle

Abstract

The utility model provides a shock absorber assembly, range extending system and vehicle, shock absorber assembly includes, double mass flywheel, including main flywheel and deputy flywheel, deputy flywheel has central shaft hole, planetary gear mechanism has power input structure and power output structure, power input structure is inlayed in central shaft hole, and is connected with deputy flywheel coaxially, passes through coaxial connection and transmits the torque of deputy flywheel to power output structure. Compared with the related art, the present embodiment selects double mass flywheel as shock absorber, and improves deputy flywheel according to the structure of planetary gear mechanism to form the central shaft hole of shape matching, so that the power input structure can be inlaid in the central shaft hole. Therefore, the double mass flywheel and the planetary gear mechanism form at least partial radial overlap, so that the axial dimension of the shock absorber assembly is effectively compressed, thereby significantly shortening the axial length of the range extending system, simplifying the system structure and improving the space utilization of the whole vehicle.

Description

Technical Field

[0001] This utility model relates to the field of hybrid vehicle technology, and in particular to a shock absorber assembly, a range extender system, and a vehicle. Background Technology

[0002] In the powertrain system of a range-extended electric vehicle (REEV), the power transmission between the internal combustion engine (ICE) and the generator is usually achieved through a damper. The damper absorbs torque fluctuations from the internal combustion engine and ensures smooth power output.

[0003] Traditional REEV systems often employ a design that combines shock absorbers with planetary gear mechanisms to achieve power distribution and multi-mode switching. In this design, the shock absorbers are responsible for vibration damping, while the planetary gear mechanism is used for power distribution.

[0004] In related technologies, the vibration damper uses a dry type, and the planetary gear mechanism uses a wet type. These are respectively housed in independent dry and wet cavities and arranged axially to meet different lubrication requirements. However, this related technology has the following shortcomings:

[0005] Because dry dampers and wet planetary gear mechanisms require separate cavities, the axial length of the range extender system increases significantly, making spatial layout difficult.

[0006] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this utility model, and therefore may include information that does not constitute prior art known to those skilled in the art. Utility Model Content

[0007] In view of the problems in the prior art, the purpose of this utility model is to provide a shock absorber assembly, a range extender system and a vehicle, which overcomes the difficulties of the prior art and can solve the technical problem of the large axial length of the range extender system in the related art.

[0008] This disclosure provides a shock absorber assembly, which includes:

[0009] A dual-mass flywheel includes a main flywheel and a secondary flywheel, wherein the secondary flywheel has a central shaft hole;

[0010] A planetary gear mechanism has a power input structure and a power output structure. The power input structure is embedded in the central shaft hole and coaxially connected to the secondary flywheel. The torque of the secondary flywheel is transmitted to the power output structure through the coaxial connection.

[0011] Optionally, the planetary gear mechanism includes a sun gear, planet gears, a ring gear, and a planet carrier, wherein the ring gear or planet carrier serves as the power input structure, and the sun gear serves as the power output structure.

[0012] Optionally, the power input structure is connected to the secondary flywheel via a spline structure, the spline structure including an internal spline disposed on the secondary flywheel and an external spline disposed on the power input structure.

[0013] Optionally, the power input structure and the secondary flywheel are connected by rivets.

[0014] Optionally, the power input structure and the auxiliary flywheel are welded together.

[0015] Optionally, the secondary flywheel includes: a transmission plate flexibly connected to the main flywheel, a central shaft hole formed in the transmission plate, and the secondary flywheel being coaxially connected to the power input structure through the transmission plate.

[0016] Optionally, the power input structure is a planetary carrier, and the transmission plate and the planetary carrier are integrally formed.

[0017] A second aspect of this disclosure provides a range extender system comprising an internal combustion engine, a shock absorber assembly according to any of the above embodiments, and an electric motor, wherein the internal combustion engine is coaxially connected to the main flywheel via a crankshaft, and the planetary gear mechanism is coaxially connected to the electric motor via the power output structure.

[0018] Optionally, the dual-mass flywheel and the planetary gear mechanism are housed in the same oil chamber.

[0019] This disclosure provides a third aspect of a vehicle, characterized in that it includes the aforementioned range extender system.

[0020] The shock absorber assembly, range extender system, and vehicle proposed in this disclosure have the following advantages:

[0021] The shock absorber assembly includes: a dual-mass flywheel comprising a main flywheel and an auxiliary flywheel, the auxiliary flywheel having a central shaft hole; and a planetary gear mechanism having a power input structure and a power output structure. The power input structure is embedded in the central shaft hole and coaxially connected to the auxiliary flywheel, transmitting the torque of the auxiliary flywheel to the power output structure via the coaxial connection. In this embodiment, the planetary gear mechanism is partially or entirely embedded in the central shaft hole of the auxiliary flywheel through the power input structure, and is arranged coaxially with the auxiliary flywheel, allowing for compact integration of the dual-mass flywheel and the planetary gear mechanism. Compared with related technologies, this embodiment selects a dual-mass flywheel as the shock absorber and adapts and improves the auxiliary flywheel according to the structure of the planetary gear mechanism to form a central shaft hole with a matching shape, allowing the power input structure to be embedded within the central shaft hole. Thus, at least partial radial overlap is formed between the dual-mass flywheel and the planetary gear mechanism, effectively compressing the axial dimension of the shock absorber assembly, thereby significantly shortening the axial length of the range extender system, simplifying the system structure, and improving the space utilization of the entire vehicle.

[0022] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0023] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings.

[0024] Figure 1 An axial cross-sectional view of the shock absorber assembly provided in this disclosure embodiment is shown;

[0025] Figure 2 An exploded view of the shock absorber assembly provided in this disclosure embodiment is shown;

[0026] Figure 3 Display assembly Figure 1 Axial cross-sectional view of the range extender system of the shock absorber assembly shown;

[0027] Figure 4 Display based on Figure 1 The diagram shows the power transmission principle of the range extender system of the shock absorber assembly.

[0028] Marker explanation:

[0029] 100, Shock absorber assembly; 1, Dual-mass flywheel; 2, Planetary gear mechanism; 11, Main flywheel; 12, Secondary flywheel; 1a, Central shaft hole; 21, Power input structure; 22, Power output structure; 3, Spring damping system; 23, Sun gear; 24, Planetary gears; 25, Ring gear; 26, Planetary carrier; 4, Internal combustion engine; 5, Electric motor; 51, Rotor; 6, Spline structure; 61, Internal spline; 62, External spline; 121, Transmission plate; 7, Sealing plate. Detailed Implementation

[0030] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, they are provided so that this disclosure will be more comprehensive and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0031] refer to Figure 1 and Figure 2 This disclosure provides a shock absorber assembly 100 for a range extender system, which includes a dual-mass flywheel 1 and a planetary gear mechanism 2.

[0032] The dual-mass flywheel 1 includes a main flywheel 11 and a secondary flywheel 12, the secondary flywheel 12 having a central shaft hole 1a ( Figure 1 (The image is obscured and not shown);

[0033] The planetary gear mechanism 2 has a power input structure 21 and a power output structure 22. The power input structure 21 is embedded in the central shaft hole 1a and is coaxially connected with the secondary flywheel 12. The torque of the secondary flywheel 12 is transmitted to the power output structure 22 through the coaxial connection.

[0034] In this embodiment, the main flywheel 11 of the dual-mass flywheel 1 is connected to the crankshaft of an internal combustion engine (not shown in the figure) to input power from the internal combustion engine. The power of the internal combustion engine is transmitted to the auxiliary flywheel 12 through the main flywheel 11, and converted into torque of the auxiliary flywheel 12. The torque of the auxiliary flywheel 12 is then transmitted to the power input structure 21 of the planetary gear mechanism 2. The planetary gear mechanism 2 is connected to the rotor of the electric motor (not shown in the figure) through the power output structure 22, so that the torque of the power input structure 21 is converted into the final driving force of the power output structure 22. A spring damping system 3 is integrated into the dual-mass flywheel 1, which is used to absorb and dissipate vibration energy and transmit torque between the main flywheel 11 and the auxiliary flywheel 12.

[0035] In this embodiment, the planetary gear mechanism 2 is partially or entirely embedded in the central shaft hole 1a of the auxiliary flywheel 12 via the power input structure 21, and is arranged coaxially with the auxiliary flywheel 12, allowing for compact integration of the dual-mass flywheel 1 and the planetary gear mechanism 2. Compared with related technologies, this embodiment selects the dual-mass flywheel 1 as a shock absorber, and adapts and improves the auxiliary flywheel 12 according to the structure of the planetary gear mechanism 2 to form a matching central shaft hole 1a, allowing the power input structure 21 to be embedded within the central shaft hole 1a. As a result, at least partial radial overlap is formed between the dual-mass flywheel 1 and the planetary gear mechanism 2, effectively compressing the axial dimension of the shock absorber assembly 100, thereby significantly shortening the axial length of the range extender system, simplifying the system structure, and improving the space utilization of the entire vehicle.

[0036] Using the damper assembly 100 of this embodiment, since the dual-mass flywheel 1 adopts a wet structure, the auxiliary flywheel 12 and the planetary gear mechanism 2 can operate in the same lubrication environment. Therefore, the dual-mass flywheel 1 and the planetary gear mechanism 2 can share a single oil chamber, thus avoiding the cavity design of traditional dry dampers where the wet planetary gear mechanism is arranged separately, and further shortening the axial length of the range extender system. In this case, this embodiment can achieve lubrication through a single oil circuit, which not only reduces the number of cavities and seals, but also reduces manufacturing and maintenance costs, while ensuring that the dual-mass flywheel 1 and the planetary gear mechanism 2 operate under stable temperature and friction conditions, thereby improving the reliability and service life of the range extender system.

[0037] In this disclosure, reference is made to Figure 1 and Figure 3 The planetary gear mechanism 2 includes a sun gear 23, planet gears 24, a ring gear 25, and a planet carrier 26. In this embodiment, the planet carrier 26 serves as the power input structure 21, and the sun gear 23 serves as the power output structure 22. Through this structural arrangement, the torque of the secondary flywheel 12 can be transmitted to the sun gear 23 via the planet carrier 26, and then output by the sun gear 23 to the subsequent electric motor.

[0038] Combination Figure 4 As shown, Figure 4 The dashed arrow in the middle indicates the direction of power transmission. The power of the internal combustion engine 4 is transmitted sequentially through the main flywheel 11, the auxiliary flywheel 12, the planet carrier 26, the planet gears 24, and the sun gear 23 to the rotor 51 of the electric motor 5.

[0039] In this embodiment, the planetary carrier 26 serves as the power input structure 21, which can provide high transmission efficiency within a limited space and is suitable for high-speed operating conditions.

[0040] In another embodiment, the gear ring can also serve as the power input structure, suitable for scenarios where the secondary flywheel provides significant circumferential support, thereby improving transmission stiffness. This disclosure is not limited to this; either the gear ring or the planetary carrier can be selected as the power input structure according to specific application requirements.

[0041] In one implementation, such as Figure 2 As shown, the power input structure 21 and the secondary flywheel 12 are connected via a spline structure 6. In this embodiment, as... Figure 2 As shown, the spline structure 6 includes an inner spline 61 disposed on the secondary flywheel 12 and an outer spline (not shown in the figure) disposed on the planetary carrier 26, and coaxial torque transmission is achieved through the meshing of the spline pair.

[0042] In another embodiment, the spline structure can be designed as a straight spline to facilitate machining and assembly. In yet another embodiment, the spline structure can be an involute spline to improve load-bearing capacity and wear resistance; a drum-shaped spline can also be used to compensate for the coaxiality error between the secondary flywheel and the planetary gear mechanism, thereby increasing service life.

[0043] In another embodiment, the power input structure 21 (e.g., planetary carrier 26) and the auxiliary flywheel 12 are connected by rivets. Multi-point riveting ensures reliable fixation between the auxiliary flywheel 12 and the power input structure 21. Specifically, rivets (not shown) can pass radially through the power input structure 21 and be riveted to the auxiliary flywheel 12 to achieve reliable fixation. Radial riveting avoids increasing the thickness of the rivet head in the axial direction, thereby further reducing the axial dimension of the damper assembly. Simultaneously, the radially riveted rivets can be evenly distributed in the overlapping area of ​​the auxiliary flywheel 12 and the power input structure 21 to maintain the dynamic balance of the rotating components.

[0044] In another embodiment, the power input structure 21 and the auxiliary flywheel 12 are fixedly connected by an axial riveting structure. Specifically, the rivet passes through the overlapping area of ​​the power input structure 21 and the auxiliary flywheel 12 axially, and forms a flanged rivet head on the back to achieve coaxial torque transmission and shear-resistant connection. To avoid adverse effects on the axial dimensions of the assembly, countersunk rivets or low-profile rivets can be used, and countersunk holes are provided on the end faces of the power input structure 21 and / or the auxiliary flywheel 12 so that the rivet head is basically flush with the end face; or the rivet head can be rolled after riveting to reduce the protrusion height. The rivet points can be evenly distributed around the rotation center at equal angles to maintain the dynamic balance of the rotating parts. In a wet lubrication environment, an annular drainage groove or sealing coating can be provided in the riveting area to suppress leakage and metal shaving migration; this disclosure does not limit the form, number, and distribution of rivets.

[0045] Optionally, the rivet can be a solid rivet to achieve a high-strength connection; it can also be a hollow rivet to reduce weight; or it can employ a self-piercing riveting process to reduce assembly difficulty. The embodiments disclosed herein are not limited to specific rivet types.

[0046] In another embodiment of this disclosure, the power input structure 21 and the secondary flywheel 12 can be connected by welding. The welding process enables the two to form an integral structure, improving torque transmission rigidity.

[0047] Alternatively, the welding connection can be laser welding to obtain a smaller heat-affected zone and higher welding precision; electron beam welding can also be used, which is suitable for applications requiring high strength; or friction welding can be used to form a reliable connection between different materials.

[0048] In this disclosure, such as Figure 1-3 As shown, the auxiliary flywheel 12 includes a transmission plate 121, and a spring damping system 3 is disposed between the main flywheel 11 and the transmission plate 121 and fixed to the transmission plate 121. In this way, the power of the internal combustion engine is transmitted from the main flywheel 11, the spring damping system 3, and the transmission plate 121 to the auxiliary flywheel 12.

[0049] In this embodiment, the transmission plate 121 is flexibly connected to the main flywheel 11. A central shaft hole 1a is formed in the transmission plate 121, and the auxiliary flywheel 12 is coaxially connected to the power input structure 21 via the transmission plate 121. Figure 2 As shown, the planetary carrier 26 can be connected to the inner spline 61 on the inner circumferential surface of the central shaft hole 1a via the outer spline 62.

[0050] In this embodiment, the transmission plate 121 serves as the secondary flywheel 12. The planetary gear mechanism 2 and its planet carrier 26 can function as a mass. In another embodiment, the secondary flywheel may include a mass and a transmission plate, with the mass flexibly connected to the main flywheel via the transmission plate, and a spring damping system mounted in the transmission plate.

[0051] In the dual-mass flywheel 1, the transmission plate 121 is connected to the main flywheel 11 through an elastic element (such as a coil spring) to transmit torque and allow a certain relative movement between the main flywheel 11 and the auxiliary flywheel 12, thereby playing a role in vibration reduction.

[0052] Through the above design, the transmission plate 121, as the end plate of the dual-mass flywheel 1, not only achieves a stable coaxial connection of the power input structure 21, but also compresses the axial dimension through partial radial overlap, while taking into account dynamic absorption, lubrication and sealing, and assembly convenience, thereby improving the compactness and reliability of the shock absorber assembly.

[0053] In this embodiment, the power input structure 21 adopts a planetary carrier 26. The transmission plate 121 and the planetary carrier 26 are integrally formed by a one-piece molding process. That is, the transmission plate 121 and the planetary carrier 26 are the same part, and the coaxial connection between the secondary flywheel 12 and the planetary gear mechanism 2 can be achieved without additional connecting parts.

[0054] Specifically, the transmission plate 121 and the planetary carrier 26 can be formed by integral casting or precision machining to ensure strength and dimensional accuracy.

[0055] Through the above-mentioned integrated design, the secondary flywheel 12 and the power input structure 21 (planetary carrier 26) form a compact and reliable overall structure, realizing efficient torque transmission between the dual-mass flywheel 1 and the planetary gear mechanism 2, while reducing the axial dimension and improving the space utilization and assembly reliability of the range extender system.

[0056] With this design, the connection between the power input structure 21 (planetary carrier 26) and the transmission plate 121 does not require riveting or welding, which ensures coaxial positioning accuracy and reduces assembly steps.

[0057] This disclosure also provides a range extender system, such as Figure 4 As shown, the range extender system includes an internal combustion engine 4, an electric motor 5, and a shock absorber assembly 100 according to any of the above embodiments. The crankshaft of the internal combustion engine 4 is coaxially connected to the main flywheel 11 of the shock absorber assembly 100 to realize the transmission of engine torque to the shock absorber assembly.

[0058] In this embodiment, the dual-mass flywheel 1 and the planetary gear mechanism 2 form at least partial radial overlap, which effectively compresses the axial dimension of the shock absorber assembly, thereby significantly shortening the axial length of the range extender system, simplifying the system structure, and improving the space utilization of the whole vehicle.

[0059] Referring to the description above, such as Figure 3 As shown, the dual-mass flywheel 1 and the planetary gear mechanism 2 are housed within the same oil chamber O. The oil chamber O provides lubrication, cooling, and sealing functions, while allowing the dual-mass flywheel 1 and the planetary gear mechanism 2 to operate under the same lubrication environment.

[0060] Specifically, a sealing plate 7 is provided on the side of the oil chamber O near the internal combustion engine, and the sealing plate 7 is used to seal the oil chamber O. The oil chamber O can be designed as a wet structure to meet the lubrication requirements of the secondary flywheel 12, the transmission plate 121 and the power input structure 21.

[0061] By arranging the components in the same cavity, the axial length of the shock absorber assembly 100 is further shortened, simplifying the structure of the range extender system and improving the overall vehicle space utilization.

[0062] This disclosure also provides a vehicle that includes the range extender system described above.

[0063] In this embodiment, the vehicle's range-extending system achieves a compact layout and high space utilization while ensuring smooth power output and vibration reduction, making it suitable for range-extended electric vehicles (REEVs) or hybrid vehicles.

[0064] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the utility models disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the appended claims.

Claims

1. A shock absorber assembly (100), characterized in that, include; A dual-mass flywheel (1) includes a main flywheel (11) and a secondary flywheel (12), the secondary flywheel (12) having a central shaft hole (1a); The planetary gear mechanism (2) has a power input structure (21) and a power output structure (22). The power input structure (21) is embedded in the central shaft hole (1a) and coaxially connected with the secondary flywheel (12). The torque of the secondary flywheel (12) is transmitted to the power output structure (22) through the coaxial connection.

2. The shock absorber assembly (100) according to claim 1, characterized in that, The planetary gear mechanism (2) includes a sun gear (23), planet gears (24), a ring gear (25) and a planet carrier (26), wherein the ring gear (25) or the planet carrier (26) serves as the power input structure (21) and the sun gear (23) serves as the power output structure (22).

3. The shock absorber assembly (100) according to claim 1, characterized in that, The power input structure (21) is connected to the secondary flywheel (12) via a spline structure (6), the spline structure (6) including an inner spline (61) disposed on the secondary flywheel (12) and an outer spline (62) disposed on the power input structure (21).

4. The shock absorber assembly (100) according to claim 1, characterized in that, The power input structure (21) and the auxiliary flywheel (12) are connected by rivets.

5. The shock absorber assembly (100) according to claim 1, characterized in that, The power input structure (21) and the auxiliary flywheel (12) are welded together.

6. The shock absorber assembly (100) according to claim 1, characterized in that, The secondary flywheel (12) includes a transmission plate (121), which is flexibly connected to the main flywheel (11). The central shaft hole (1a) is formed in the transmission plate (121), and the secondary flywheel (12) is coaxially connected to the power input structure (21) through the transmission plate (121).

7. The shock absorber assembly (100) according to claim 6, characterized in that, The power input structure (21) is a planetary carrier (26), and the transmission plate (121) and the planetary carrier (26) are integrally formed.

8. A range extender system, characterized in that, The device includes an internal combustion engine (4), a shock absorber assembly (100) according to any one of claims 1-7, and an electric motor (5). The internal combustion engine (4) is coaxially connected to the main flywheel (11) via a crankshaft, and the planetary gear mechanism (2) is coaxially connected to the electric motor (5) via the power output structure (22).

9. The range extender system according to claim 8, characterized in that, The dual-mass flywheel (1) and the planetary gear mechanism (2) are located in the same oil cavity.

10. A vehicle, characterized in that, Includes the range extender system as described in claim 8 or 9.

Images