Powertrain and vehicle

Abstract

The utility model discloses a power system and vehicle relates to vehicle body structure technical field, wherein, power system is used to set up between two longitudinal beams of vehicle, power system includes range extender and auxiliary frame, range extender includes engine and generator, and engine and generator are along the extension direction of longitudinal beam arrangement, and the length direction of range extender is identical with the extension direction of longitudinal beam, the auxiliary frame presents the frame structure, and range extender is connected in auxiliary frame through suspension assembly, and the auxiliary frame is used to be connected in longitudinal beam, and supplies the suspension of vehicle installation. The utility model provides technical scheme to reduce the development cost of increasing because of the alteration longitudinal beam span, and guarantees the crash safety performance and the driving stability of vehicle.

Description

Technical Field

[0001] This utility model relates to the field of vehicle body structure technology, and in particular to a power system and vehicle. Background Technology

[0002] Range-extended electric vehicles typically consist of an engine and a generator, with the range extender being equipped with a range extender. The range extender acts as an on-board power generation unit, starting up when the battery is low to provide power to the drive motor, thereby effectively extending the vehicle's driving range and alleviating users' range anxiety.

[0003] Common range extender layouts often employ a transverse arrangement, where the engine and generator are aligned along the vehicle's transverse direction. This arrangement requires a significant amount of longitudinal beam space, resulting in a larger span for the vehicle's longitudinal beams. Furthermore, larger range extenders necessitate adjustments to the longitudinal beam span. This not only increases the complexity and cost of vehicle development but also weakens the vehicle's torsional stiffness, impacting its collision safety performance and driving stability. Utility Model Content

[0004] The main objective of this invention is to propose a power system and vehicle that aims to reduce development costs and ensure the vehicle's collision safety performance and driving stability.

[0005] To achieve the above objectives, the power system proposed in this utility model is used to be installed between two longitudinal beams of a vehicle, and the power system includes:

[0006] A range extender, comprising an engine and a generator, the engine and the generator being arranged along the extension direction of the longitudinal beam, the length direction of the range extender being aligned with the extension direction of the longitudinal beam; and

[0007] The subframe is a frame structure. The range extender is connected to the subframe via a suspension assembly. The subframe is used to connect to the longitudinal beam and to provide mounting for the vehicle's suspension.

[0008] In one embodiment, the suspension assembly includes a first suspension assembly and a second suspension assembly, the engine is connected to the subframe via the first suspension assembly, and the generator is connected to the subframe via the second suspension assembly.

[0009] In one embodiment, the subframe includes a connecting crossbeam and two support beams, the range extender is located between the two support beams, the two support beams are connected by the connecting crossbeam, and the support beams extend longitudinally.

[0010] In one embodiment, the suspension assembly includes two second suspension assemblies, one of which is connected to one of the support beams.

[0011] In one embodiment, the suspension assembly includes two first suspension assemblies, one of which is connected to one of the support beams.

[0012] In one embodiment, the subframe further includes booms, the distance between the two support beams is less than the distance between the two longitudinal beams, the subframe is located below the longitudinal beams, the booms of the two support beams extend obliquely in opposite directions in the vehicle width direction, one end of the boom is connected to the support beam, and the other end is used to connect to the longitudinal beam.

[0013] In one embodiment, the first suspension assembly is connected to the side of the boom opposite to the engine.

[0014] In one embodiment, the subframe is provided with at least two sets of booms, each set of booms including two booms respectively connected to two support beams, the two sets of booms being spaced apart along the extension direction of the support beams and located below the range extender.

[0015] In one embodiment, the boom is disposed adjacent to one end of the support beam, the connecting beam includes a first connecting beam, the other end of the support beam is connected to the first connecting beam, the two ends of the first connecting beam are provided with connecting ends, the two connecting ends are located on opposite sides of the two support beams, and the connecting ends are used to suspend the longitudinal beam.

[0016] In one embodiment, a mounting portion is provided on the support beam between the boom and the first connecting crossbeam, the mounting portion being used for mounting the suspension.

[0017] In one embodiment, the connecting beam includes a second connecting beam, through which the two support beams are connected, and the second connecting beam is disposed adjacent to the boom.

[0018] In one embodiment, the first suspension assembly includes a first suspension bracket and a first suspension body, the first suspension bracket being mounted on the engine, the first suspension body being mounted on the subframe, and the first suspension bracket extending to connect with the first suspension body.

[0019] In one embodiment, the second suspension assembly includes a second suspension bracket and a second suspension body. The second suspension bracket is mounted on the generator, and the second suspension body is mounted on the subframe. The second suspension bracket and the second suspension body are connected in a horizontal direction.

[0020] This utility model also proposes a vehicle comprising two longitudinal beams and a power system as described above, wherein the power system is disposed between the two longitudinal beams.

[0021] This invention's technical solution arranges the engine and generator along the extension direction of the longitudinal beams, meaning the range extender's length direction aligns with the longitudinal beam's extension direction. This fully utilizes the space in the middle of the vehicle chassis along the longitudinal beam's extension direction, resulting in a smaller lateral space occupied by the range extender. This avoids adjusting or redesigning the span between the longitudinal beams on both sides of the vehicle. Compared to existing technologies where the range extender's length direction is laterally aligned with the vehicle, requiring wider longitudinal beam spacing, this solution reduces the need to modify the longitudinal beam span, ensuring the beams' bending and torsional stiffness, reducing vehicle development costs, and improving the overall vehicle's structural safety performance and collision energy transfer efficiency. Simultaneously, the subframe is a frame structure with high structural stiffness and deformation resistance. The range extender is connected to the subframe via suspension components. The frame subframe evenly distributes the load from the range extender and smoothly transmits it through the longitudinal beams, avoiding localized stress concentration and providing stable support for the range extender. Furthermore, the subframe not only supports the range extender but also serves as the mounting point for the vehicle's suspension. In other words, the subframe integrates suspension mounting and range extender support, eliminating the need for a separate support structure for the range extender. This allows the powertrain and suspension systems to share a common platform, reducing the number of independent supports, simplifying chassis assembly, and improving space utilization and modularity. Additionally, the frame-type subframe reduces suspension deformation under stress, enhancing vehicle handling. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0023] Figure 1 A schematic diagram of the structure of an embodiment of the power system provided by this utility model;

[0024] Figure 2 for Figure 1 A magnified view of a section at point A in the middle;

[0025] Figure 3 for Figure 1 A structural schematic diagram of the power system from another perspective;

[0026] Figure 4 for Figure 1 Explosion diagram of the central propulsion system;

[0027] Figure 5 for Figure 1 A schematic diagram of the structure in which the power system is installed on the longitudinal beam.

[0028] Explanation of icon numbers:

[0029] 101. Engine; 102. Generator;

[0030] 200. Subframe; 210. Support beam; 220. First connecting crossbeam; 230. Second connecting crossbeam; 240. Crane boom; 250. Mounting unit;

[0031] 301, First suspension assembly; 310, First suspension bracket; 320, First suspension body; 302, Second suspension assembly; 330, Second suspension bracket; 340, Second suspension body; 400, Longitudinal beam.

[0032] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0034] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0035] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0036] This utility model proposes a power system.

[0037] Please refer to Figure 1 , Figure 4 and Figure 5 In one embodiment of this utility model, the power system is used to be disposed between two longitudinal beams 400 of the vehicle, and the power system includes:

[0038] A range extender, comprising an engine 101 and a generator 102, the engine 101 and generator 102 being arranged along the extension direction of the longitudinal beam 400, the longitudinal direction of the range extender being consistent with the extension direction of the longitudinal beam 400; and

[0039] The subframe 200 has a frame structure. The range extender is connected to the subframe 200 through a suspension assembly. The subframe 200 is used to connect to the longitudinal beam 400 and to provide a mounting point for the vehicle's suspension.

[0040] The technical solution of this utility model arranges the engine 101 and generator 102 along the extension direction of the longitudinal beam, that is, the length direction of the range extender is consistent with the extension direction of the vehicle's longitudinal beam 400. This makes full use of the space in the middle of the vehicle chassis along the extension direction of the longitudinal beam 400, so that the range extender occupies less space in the lateral direction of the vehicle. This avoids the need to adjust or redesign the span between the longitudinal beams 400 on both sides of the vehicle. Compared with the prior art where the length direction of the range extender is in the lateral direction of the vehicle, which requires widening the spacing of the longitudinal beams 400, this solution reduces the modification of the span of the longitudinal beams 400, ensures the bending and torsional stiffness of the longitudinal beams 400, and also reduces the development cost of the vehicle. It is beneficial to improve the structural safety performance and collision energy transfer efficiency of the entire vehicle. At the same time, the subframe 200 is a frame structure with high structural stiffness and deformation resistance. The range extender is connected to the subframe 200 through the suspension assembly. The frame subframe 200 can evenly distribute the load from the range extender and achieve smooth transmission through the longitudinal beams 400, avoiding local stress concentration and providing stable support for the range extender. Furthermore, the subframe 200 not only supports the range extender but also serves as the mounting point for the vehicle's suspension. In other words, the subframe 200 integrates suspension mounting and range extender support, avoiding the need for a separate support structure for the range extender. This allows the powertrain and suspension systems to share a common platform, reducing the number of independent supports, simplifying chassis assembly, and improving space utilization and modularity. Additionally, the frame-type subframe 200 can reduce suspension deformation under stress, enhancing vehicle handling.

[0041] It is understandable that during the vehicle manufacturing process, the range extender, suspension components, and subframe 200 can be pre-assembled into a complete powertrain system, which is then hoisted onto the longitudinal beam 400 for positioning and connection, significantly improving assembly efficiency and consistency. It should be noted that the subframe 200 can be located below the longitudinal beam 400, hoisted onto it, or it can be installed parallel to the longitudinal beam 400. The frame-type subframe 200 is understood to form a closed-loop stress distribution throughout, with the suspension components connected to the range extender around the frame-type subframe 200 to ensure even support of the subframe 200 around the range extender, thus ensuring the stability of the range extender on the subframe 200. Furthermore, the connection between the generator 102 and the engine 101 can be achieved through flange connections or by integrating both into a single housing. The generator 102 and engine 101 are arranged longitudinally along the vehicle. Either the generator 102 or the engine 101 can be positioned closer to the front of the vehicle. Furthermore, the range extender can be located in either the front or rear engine compartment. In this technical solution, "longitudinal" refers to the length of the vehicle, and "lateral" refers to the width. Therefore, the length direction of the range extender, which corresponds to the arrangement direction of the engine 101 and generator 102, can be parallel or nearly parallel to the extension direction of the longitudinal beam 400.

[0042] In one embodiment, please refer to Figure 1 , Figure 2 and Figure 4 The suspension assembly includes a first suspension assembly 301 and a second suspension assembly 302. The engine 101 is connected to the subframe 200 via the first suspension assembly 301, and the generator 102 is connected to the subframe 200 via the second suspension assembly 302. Without loss of generality, both the first suspension assembly 301 and the second suspension assembly 302 are composite rubber-metal bushing structures with three-dimensional vibration isolation function. Since the engine 101 generates combustion explosive force and rotational imbalance force during operation, it is the main source of vibration excitation, while the generator 102 mainly bears the torque transmission vibration from the engine 101 and its own electromagnetic excitation force. The two differ significantly in mass distribution, excitation frequency, and vibration modes. By setting independent first suspension assemblies 301 and second suspension assemblies 302, separate elastic support for the engine 101 and the generator 102 is achieved. The first suspension assembly 301 is adapted to the weight, center of gravity position, and main excitation frequency of the engine 101 to effectively suppress the pitch, vertical sway, and lateral oscillation modes of the engine 101. The second suspension assembly 302 is matched according to the structural features and stress characteristics of the generator 102 to ensure the dynamic stability of the generator 102 under high-speed rotation conditions. Of course, in other embodiments, the suspension assembly can also be installed on both the generator 102 and the engine 101 simultaneously via a bracket.

[0043] Regarding the structural form of the subframe 200, in one embodiment, please refer to... Figure 1 , Figure 4 The subframe 200 includes a connecting crossbeam and two support beams 210. The range extender is located between the two support beams 210, which are connected by the connecting crossbeam. The support beams 210 extend longitudinally. Referring to the vehicle's left-right (width) and front-rear (length) directions, the two support beams 210 are located on the left and right sides of the range extender, extending along the vehicle's front-rear direction. The length of the support beams 210 is substantially parallel to the longitudinal axis of the engine 101 and generator 102. The range extender is located in the space between the two support beams 210. The number of connecting crossbeams can be set to one or more depending on the length of the range extender and the load distribution, for example, at the front, middle, and rear positions, to enhance the overall rigidity of the subframe 200 and rationally distribute the load. Simultaneously, because the support beams 210 extend longitudinally and are arranged parallel or approximately parallel to the vehicle's longitudinal beams 400, the support beams 210 themselves possess good bending and torsional resistance. When the subframe 200 is mounted to the longitudinal beam 400 via the support beam 210, it forms an extended structure that cooperates with the longitudinal beam 400 in bearing loads, effectively transferring dynamic loads from the range extender and suspension, while avoiding cutting or widening the span of the longitudinal beam 400. The first suspension assembly 301 and the second suspension assembly 302 can be connected to the support beam 210 or to the connecting crossbeam. In this embodiment, the suspension assemblies are connected to the support beam 210 indirectly or directly. Of course, in other embodiments, the support beam 210 can also be distributed at an angle to the longitudinal direction.

[0044] In one embodiment, please refer to Figure 1 , Figure 2 and Figure 4 The suspension assembly includes two second suspension assemblies 302, one of which is connected to a support beam 210. It can be understood that the two support beams 210 are arranged parallel to each other along the longitudinal direction of the vehicle, located on the left and right sides of the range extender, respectively. Each second suspension assembly 302 is fixedly connected to the support beam 210 on the same side, meaning the two second suspension assemblies 302 are respectively located on the left and right sides of the generator 102. Combined with the longitudinal arrangement of the engine 101 and the generator 102, for the generator 102, the two second suspension assemblies 302 form a limiting support in the vehicle width direction, and the first suspension assembly 301 and the second suspension assembly 302 form a limiting support in the vehicle length direction, thereby effectively ensuring the stability of the generator 102. Similarly, in this embodiment, please refer to... Figure 1 , Figure 3 and Figure 4The suspension assembly includes two first suspension assemblies 301, one of which is connected to a support beam 210. Each first suspension assembly 301 is fixedly connected to the support beam 210 on the same side, meaning the two first suspension assemblies 301 are located on the left and right sides of the engine 101. Combined with the longitudinal arrangement of the engine 101 and generator 102, the two first suspension assemblies 301 provide limiting support in the vehicle width direction for the generator 102, and the first and second suspension assemblies 301 and 302 provide limiting support in the vehicle length direction, effectively ensuring the stability of the engine 101. Thus, the suspension assembly provides four-point support for the range extender in both vehicle length and width, which helps improve the stability of the range extender on the subframe 200 and enhances the integration and structural coordination of the powertrain. The first suspension assembly 301 or the second suspension assembly 302 can be directly connected to the support beam 210, or indirectly connected to the support beam 210 through components such as brackets. Of course, in other embodiments, the first suspension component 301 or the second suspension component 302 may also be connected to the connecting beam.

[0045] Regarding the connection method between the support beam 210 and the longitudinal beam 400, in one embodiment, please refer to... Figure 1 , Figure 3 and Figure 4The subframe 200 also includes a boom 240. The distance between the two support beams 210 is smaller than the distance between the two longitudinal beams 400. The subframe 200 is located below the longitudinal beams 400. The booms 240 of the two support beams 210 extend diagonally away from the ground in the vehicle width direction. One end of the boom 240 is connected to the support beam 210, and the other end is used to connect to the longitudinal beam 400. It can be understood that the overall structural dimensions of the subframe 200 are smaller than the span of the longitudinal beams 400 at the bottom of the vehicle body, allowing the subframe 200 to be installed in a recessed layout in the area below the longitudinal beams 400, rather than being directly embedded inside the longitudinal beams 400 or installed flush with them. Here, the subframe 200 is rigidly connected to the upper longitudinal beam 400 via a boom 240, causing the subframe 200 to gradually expand upwards. The inner end of the boom 240 (the end closer to the vehicle's centerline) is fixedly connected to the outer wall or extended bracket of the support beam 210, while the outer end (the end farther from the vehicle's centerline) extends upwards and outwards at an angle, ultimately connecting to the inner web of the longitudinal beam 400 or a pre-set mounting node via bolts or welding. This facilitates the installation of the subframe 200 and the range extender onto the longitudinal beam 400 after they are connected and formed by the suspension assembly, improving the overall vehicle assembly efficiency. The boom 240 extends vertically and is inclined along the vehicle width direction. In the vehicle length direction, the boom 240 can be perpendicular to the longitudinal direction, or it can be slightly inclined while being perpendicular to the longitudinal direction. If multiple booms 240 are distributed longitudinally, they can be inclined in opposite directions along the longitudinal direction when extending vertically. Of course, in other embodiments, the support beam 210 may also be located below the longitudinal beam 400, and the boom 240 may extend vertically and be connected to the lower and left and right sides of the longitudinal beam 400.

[0046] Regarding the connection method between the first suspension assembly 301 and the support beam 210, in one embodiment, please refer to... Figures 2 to 4The first suspension assembly 301 is connected to the side of the boom 240 opposite to the engine 101. It should be noted that the boom 240 is vertically inclined towards the vehicle width, and the side of the boom 240 opposite to the engine 101 is relatively vertically inclined. The boom 240 has a mounting structure for mounting the first suspension assembly 301, such as a groove formed on the side of the boom 240 opposite to the engine 101. Thus, by extending the boom 240 laterally towards the vehicle, the mounting point of the first suspension assembly 301 is extended outwards, increasing the lateral span between the first suspension assemblies 301 on the left and right sides of the engine 101. A larger suspension span helps improve the anti-overturning capability of the engine 101, especially when the vehicle is turning or the road surface is uneven, causing changes in lateral acceleration. This effectively suppresses the lateral swaying and torsional vibration of the engine 101 around its center of gravity, enhancing the dynamic stability of the powertrain. Meanwhile, the first suspension assembly 301 is connected to the boom 240. As the main force-transmitting component between the subframe 200 and the longitudinal beam 400, the boom 240 possesses high structural rigidity and dynamic response capability. Therefore, the suspension load can be directly and efficiently transferred to the longitudinal beam 400 through the boom 240, avoiding energy loss and structural deformation caused by the suspension force flow bypassing or being transmitted through weak structures. Additionally, it can raise the installation position of the first suspension assembly, ensuring the rigidity of the first suspension assembly 301. Of course, in other embodiments, the boom 240 can also be directly connected to the support beam 210.

[0047] In one embodiment, please refer to Figure 1 , Figure 4 and Figure 5The subframe 200 is equipped with at least two sets of booms 240. Each set of booms 240 includes two booms 240 respectively connected to two support beams 210. The two sets of booms 240 are spaced apart along the extension direction of the support beams 210 and are located below the range extender. Each set of booms 240 consists of two booms 240, left and right. One end of the left boom 240 is connected to the left support beam 210, and the other end extends upward and outward to connect to the left longitudinal beam 400; similarly, the right boom 240 connects the right support beam 210 and the right longitudinal beam 400. The two sets of booms 240 are spaced apart along the vehicle's longitudinal direction (i.e., the extension direction of the support beams 210). For example, one set of booms 240 is arranged below the front of the range extender, and the other set is arranged below the rear of the range extender, forming a symmetrical front-to-back dual-support structure system or an optimized arrangement based on mass distribution. Thus, compared to a single-group hanger arm connection, multiple groups of hangers 240 form a front-to-rear coordinated force-bearing structure, which can more evenly distribute the concentrated loads (such as the weight of the range extender, suspension reaction force, acceleration / braking inertia force, etc.) borne by the subframe 200 to multiple sections of the longitudinal beam 400, avoiding load concentration in local areas, thereby reducing the local stress level of the longitudinal beam 400 and enhancing the connection stiffness and torsional resistance between the subframe 200 and the body longitudinal beam 400. The left and right first suspension components 301 can be connected to the same group of hangers 240 or to different groups of hangers 240. Of course, in other embodiments, only one group of hangers 240 may be provided below the range extender.

[0048] In one embodiment, please refer to Figure 1 , Figure 4 and Figure 5The boom 240 is positioned adjacent to one end of the support beam 210. A connecting beam includes a first connecting beam 220. The other end of the support beam 210 is connected to the first connecting beam 220. Both ends of the first connecting beam 220 have connecting ends located on opposite sides of the two support beams 210. These connecting ends are used for hoisting onto the longitudinal beam 400. It can be understood that the boom 240, as the main connecting component at the front or middle, has its inner end connected to the support beam 210 near the front or middle of the range extender, extending upwards and outwards to achieve a rigid connection with the inner side of the longitudinal beam 400, bearing part of the vertical and longitudinal loads. Simultaneously, the other end of the support beam 210 (e.g., the rear end) achieves lateral connection and load transfer through the first connecting beam 220. The first connecting beam 220 not only connects the left and right support beams 210 and enhances the overall rigidity of the subframe 200, but also has outwardly extending connecting ends at both ends. These connecting ends are located on the outer side of the support beams 210 (i.e., the side away from the vehicle centerline) for connection to the bottom or inner web of the longitudinal beam 400. This improves the longitudinal, vertical, and lateral constraint capacity of the subframe 200, distributes dynamic loads from the range extender and suspension, avoids excessive stress on a single connection area, and enhances the stability of the connection between the powertrain and the longitudinal beam 400. Meanwhile, the connecting ends of the first connecting crossbeam 220 are located on the opposite sides of the two supporting beams 210, i.e., arranged in the outer area or bottom extension position of the longitudinal beam 400. This results in a wider distribution of connection points and a larger support span. Furthermore, it ensures that the distance between the two supporting beams 210 is less than the distance between the two longitudinal beams 400, guaranteeing the longitudinal extension of the supporting beams 210. This, in turn, ensures the uniformity of stress at the connection points of the subframe 200 and the longitudinal beam 400, thereby improving the connection stability between the power system and the longitudinal beam 400. Reinforcing members are provided on the opposite sides of the connection points between the two supporting beams 210 and the first connecting crossbeam 220 to form a triangular area at the connection point, ensuring the connection stability of the supporting beams 210 and the first connecting crossbeam 220, and thus ensuring the structural stability of the frame subframe 200. Alternatively, in other embodiments, one end of the supporting beam 210 connecting to the first connecting crossbeam 220 can be connected to the longitudinal beam 400 via a boom 240.

[0049] In one embodiment, please refer to Figure 1 , Figure 4 and Figure 5Between the boom 240 and the first connecting crossbeam 220, a support beam 210 is provided with a mounting portion 250 for suspension mounting. The mounting portion 250 is understood to be for mounting the suspension. The support beam 210 extends longitudinally along the vehicle, and in the intermediate section between the boom 240 connection area (e.g., the front) and the first connecting crossbeam 220 connection area (e.g., the rear), it is provided with structures such as welded nuts, mounting holes, reinforcing brackets, or integrated mounting lugs, forming the mounting portion 250. The mounting portion 250 is located on the side wall or bottom surface of the support beam 210, extending outwards towards the wheel, facilitating a rigid or elastic connection with the suspension. For example, the outer ball joint of the front lower control arm can be bolted to the mounting portion 250 on the support beam 210, achieving reliable suspension positioning and force transmission. Thus, by providing the mounting part 250 on the support beam 210 between the boom 240 and the first connecting crossbeam 220, the structural strength and spatial position of the support beam 210 are fully utilized. The subframe 200 is configured as an integrated mounting base for the range extender and suspension, reducing the number of parts, weight, and assembly steps required by independently setting suspension or range extender mounting brackets in traditional chassis. This improves the modularity and assembly efficiency of the entire vehicle chassis. Simultaneously, with the boom 240 positioned below the range extender and the mounting part 250 located between the boom 240 and the first connecting crossbeam 220, the range extender and suspension have longitudinally staggered space, which is beneficial for the spatial arrangement of the vehicle chassis. Of course, in other embodiments, a crossbeam can be provided between the two support beams 210, with the mounting part 250 for suspension mounting located on the crossbeam.

[0050] In one embodiment, please refer to Figure 3 and Figure 4The connecting beam includes a second connecting beam 230, through which two support beams 210 are connected. The second connecting beam 230 is located adjacent to the boom 240. It can be understood that the second connecting beam 230 extends laterally along the vehicle, with its two ends fixedly connected to the support beams 210 on the left and right sides, respectively, for example, by welding, riveting, or high-strength bolts, so that the subframe 200 forms a closed frame structure. The second connecting beam 230 is located near the root region of the boom 240, that is, near the connection node between the boom 240 and the support beams 210. It can be connected to either the boom 240 or the support beams 210. In other words, the second connecting beam 230 and the boom 240 are both located under the range extender, thereby forming a rigid enclosure and providing reinforced support for the mounting area of ​​the boom 240. This enhances the local structural rigidity and deformation resistance of the boom 240 connection area, improves its bending and torsional resistance, prevents connection failure due to local yielding or fatigue cracking, and ensures the stability of the subframe 200's support for the range extender. Furthermore, the second connecting beam 230 can also serve as a mounting base for other functional components. For example, mounting points for fixing the range extender cooling pipes, high-voltage wiring harnesses, or suspension auxiliary brackets can be installed on it, further enhancing the functional integration of the subframe 200. The second connecting beam 230 can extend along the vehicle width direction or at an angle relative to the vehicle width direction.

[0051] Regarding the structural form of the first suspension component 301, in one embodiment, please refer to... Figure 2 and Figure 4The first suspension assembly 301 includes a first suspension bracket 310 and a first suspension body 320. The first suspension bracket 310 is mounted on the engine 101, and the first suspension body 320 is mounted on the subframe 200. The first suspension bracket 310 extends to connect with the first suspension body 320. It is understood that the first suspension bracket 310 is made of a metal material (such as high-strength steel or aluminum alloy) and has sufficient structural strength and rigidity. One end is connected to the suspension mount of the engine 101 by bolts or welding, and the other end extends downwards and outwards at an angle. The first suspension body 320 is a component with elastic vibration isolation function and can be in the form of rubber-metal bushings, hydraulic suspension, or semi-active suspension. Its fixed end is connected to the mounting point of the subframe 200, such as the boom 240, and its movable end is detachably connected to the extended end of the first suspension bracket 310 by a pin, bolt, or hinge structure. The first suspension bracket 310 and the first suspension body 320 can be arranged at an angle, meaning the first suspension bracket 310 extends outward and downward from the engine 101, eventually connecting with the first suspension body 320 located on the side of the boom 240 facing the engine 101. Thus, the spatial oblique support structure formed by the inclined first suspension bracket 310 and the first suspension body 320 can effectively decompose and transmit the multidimensional dynamic forces generated by the engine 101 during operation. For example, the vertical vibration generated by the engine 101 during combustion can be decomposed into tensile and compressive components along the axis of the first suspension bracket 310 through the tilt angle of the first suspension assembly 301, while suppressing coupled vibrations in the lateral and torsional directions. Alternatively, the first suspension bracket 310 and the first suspension body 320 can be connected horizontally, but the first suspension body 320 will exhibit damping deformation in the vertical and vehicle width directions.

[0052] Regarding the structural form of the second suspension component 302, in one embodiment, please refer to... Figure 2 and Figure 4The second suspension assembly 302 includes a second suspension bracket 330 and a second suspension body 340. The second suspension bracket 330 is mounted on the generator 102, and the second suspension body 340 is mounted on the subframe 200. The second suspension bracket 330 and the second suspension body 340 are connected in a horizontal direction. It can be understood that the second suspension bracket 330 is made of high-strength metal material and is fastened to the side of the generator 102 by bolts, and is connected to the second suspension body 340 in a horizontal direction (i.e., the vehicle width direction or approximately horizontal direction). The second suspension body 340 is a component with elastic damping function, such as a rubber bushing, hydraulic bushing, or composite elastomer structure. Its fixed end is fixed to the support beam 210 of the subframe 200, and its movable end is connected to the second suspension bracket 330 through a pin, bolt, or hinge structure. The connection direction is generally horizontal or nearly horizontal. The second suspension body 320 exhibits shock-absorbing deformation in the vertical and vehicle length directions, ensuring that the second suspension assembly 302 is positioned to control the lateral and vertical vibrations of the generator 102. Thus, the use of a horizontally connected second suspension bracket 330 and second suspension body 340 allows the generator 102 to be centrally positioned within the subframe 200, achieving stable support without increasing vertical height occupation. This helps lower the overall vehicle center of gravity and improve driving stability. Simultaneously, when the generator 102 generates vertical vibration during high-speed rotation, the horizontally arranged second suspension assembly 302 can effectively resist the tendency to bounce through its structural stiffness. Furthermore, under vehicle turning or lateral road surface excitation, the lateral elasticity of the suspension body can absorb lateral impacts, suppressing the lateral sway of the generator 102, thereby improving operational smoothness. In this way, by combining the arrangement of the first suspension bracket 310 and the first suspension body 320 in the first suspension assembly 301, the first suspension assembly 301 has good vertical and horizontal shock absorption, and the second suspension assembly 302 has good axial and vertical shock absorption, thereby achieving three-dimensional shock absorption of the range extender in the vertical, axial and horizontal directions, ensuring the stability of the range extender.

[0053] This utility model also proposes a vehicle including a power system. The specific structure of the power system is as described in the above embodiments. Since this vehicle adopts all the technical solutions of all the above embodiments, it possesses at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated upon here. Referring to... Figure 5 The power system is located between two longitudinal beams 400. The vehicle's suspension (not shown in the figure) is also mounted on the subframe 200 in the power system. The subframe 200 is a bracket that supports the front and rear axles and suspension, so that the axles and suspension are connected to the longitudinal beams 400 of the frame through the subframe 200.

[0054] The above description is merely an exemplary embodiment of the present utility model and does not limit the scope of protection of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the scope of protection of the present utility model.

Claims

1. A power system, characterized in that, For mounting between two longitudinal beams of a vehicle, the power system includes: A range extender, comprising an engine and a generator, the engine and generator being arranged along the extension direction of the longitudinal beam, the length direction of the range extender being aligned with the extension direction of the longitudinal beam; and The subframe is a frame structure. The range extender is connected to the subframe via a suspension assembly. The subframe is used to connect to the longitudinal beam and to provide mounting for the vehicle's suspension.

2. The power system as described in claim 1, characterized in that, The suspension assembly includes a first suspension assembly and a second suspension assembly. The engine is connected to the subframe via the first suspension assembly, and the generator is connected to the subframe via the second suspension assembly.

3. The power system as described in claim 2, characterized in that, The subframe includes a connecting crossbeam and two support beams, with the range extender located between the two support beams. The two support beams are connected by the connecting crossbeam, and the support beams extend longitudinally.

4. The power system as described in claim 3, characterized in that, The suspension assembly includes two second suspension assemblies, one of which is connected to one of the support beams; And / or, the suspension assembly includes two first suspension assemblies, one of which is connected to one of the support beams.

5. The power system as described in claim 3, characterized in that, The subframe also includes booms. The distance between the two support beams is less than the distance between the two longitudinal beams. The subframe is located below the longitudinal beams. The booms of the two support beams extend at opposite angles in the vehicle width direction. One end of the boom is connected to the support beam, and the other end is used to connect to the longitudinal beam.

6. The power system as described in claim 5, characterized in that, The first suspension assembly is connected to the side of the boom opposite to the engine; And / or, the subframe is provided with at least two sets of the booms, each set of the booms including two booms respectively connected to two support beams, the two sets of booms being spaced apart along the extension direction of the support beams and located below the range extender.

7. The power system as described in claim 5, characterized in that, The boom is located near one end of the support beam. The connecting beam includes a first connecting beam. The other end of the support beam is connected to the first connecting beam. The two ends of the first connecting beam are provided with connecting ends. The two connecting ends are located on opposite sides of the two support beams. The connecting ends are used to suspend the beams.

8. The power system as described in claim 7, characterized in that, Between the boom and the first connecting crossbeam, the support beam is provided with a mounting part, which is used for mounting the suspension; And / or, the connecting beam includes a second connecting beam, through which the two support beams are connected, the second connecting beam being disposed adjacent to the boom.

9. The power system as described in claim 2, characterized in that, The first suspension assembly includes a first suspension bracket and a first suspension body. The first suspension bracket is mounted on the engine, and the first suspension body is mounted on the subframe. The first suspension bracket extends to connect with the first suspension body. And / or, the second suspension assembly includes a second suspension bracket and a second suspension body, the second suspension bracket being mounted on the generator, the second suspension body being mounted on the subframe, and the second suspension bracket and the second suspension body being connected in a horizontal direction.

10. A vehicle, characterized in that, It includes two longitudinal beams and a power system as described in any one of claims 1 to 9, wherein the power system is disposed between the two longitudinal beams.

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