Skateboard Chassis and Vehicles

Abstract

This application relates to the field of transportation technology and provides a skateboard chassis and vehicle to solve the problem of complex assembly and disassembly of an electric drive assembly. The skateboard chassis provided in this application includes a primary vehicle frame and an electric drive assembly. The primary vehicle frame includes a first longitudinal beam, a second longitudinal beam, and a plurality of horizontal beams. The first longitudinal beam and the second longitudinal beam are spaced apart in the vehicle width direction, and each horizontal beam is connected between the first longitudinal beam and the second longitudinal beam, and the plurality of horizontal beams are spaced apart. The electric drive assembly is disposed between the front section of the first longitudinal beam and the front section of the second longitudinal beam, both of which have a single-layer beam structure; or the electric drive assembly is disposed between the rear section of the first longitudinal beam and the rear section of the second longitudinal beam, both of which have a single-layer beam structure. In the skateboard chassis provided herein, the vertical and horizontal beams do not block the electric drive assembly, making disassembly and assembly less difficult. This contributes to improving production efficiency and after-sales efficiency.

Description

[Technical Field]

[0001] This application relates to the field of vehicle technology, and more particularly to skateboard chassis and vehicles. [Background technology]

[0002] In a vehicle equipped with a conventional supported upper vehicle body, assembly and performance requirements require the chassis to be connected to the upper vehicle body through front and rear secondary vehicle frames. The electric drive system, front-end module system, and chassis systems, including suspension, steering, brakes, etc., are first pre-assembled separately with the front and rear secondary vehicle frames to form front and rear axle assemblies, which are then assembled with the upper vehicle body to form the entire vehicle.

[0003] However, as a product that meets the research and development requirements for upper-lower separation of the entire vehicle, the skateboard chassis is significantly different in structure from the chassis of a conventional vehicle equipped with a supporting vehicle body. In a skateboard chassis, a primary vehicle frame is configured to mount the chassis and power system. The skateboard chassis does not have an independent secondary vehicle frame, but integrates the primary vehicle frame with the secondary vehicle frame.

[0004] However, this integration method merely simplifies the simple connection method, for example, changing bolted or bushing connections to welding, but the structural frame is still complex, occupies a large vertical space, and the installation and disassembly of the electric drive assembly are complicated. Summary of the Invention [Means for solving the problem]

[0005] The present application provides a skateboard chassis and vehicle that improves integration of the primary vehicle frame, reduces vertical footprint, and facilitates disassembly and installation of the electric drive assembly.

[0006] According to a first aspect, the present application provides a skateboard chassis. The skateboard chassis includes a primary vehicle frame and an electric drive assembly. The primary vehicle frame includes a first longitudinal beam and a second longitudinal beam spaced apart in the vehicle width direction, and a plurality of horizontal beams connected and spaced apart between the first longitudinal beam and the second longitudinal beam. To reduce the vertical space required, the following two solutions are provided. In one case, the electric drive assembly is disposed between a front section of the first longitudinal beam and a front section of the second longitudinal beam, and both the front section of the first longitudinal beam and the front section of the second longitudinal beam are single-layer beam structures. Alternatively, in another case, the electric drive assembly is disposed between the rear section of the first longitudinal beam and the rear section of the second longitudinal beam, both of which are single-layer beam structures. The single-layer beam structure reduces the vertical space occupied. Additionally, the horizontal beams do not block the electric drive assembly in the vertical direction. When the skateboard chassis is assembled, the electric drive assembly can be placed vertically from top to bottom, reducing the difficulty of the installation process. This helps improve production efficiency and assembly accuracy. Since there is no horizontal beam block below, the electric drive assembly can be easily removed from below for easier after-sales maintenance. Compared to a double-layer longitudinal beam structure, the single-layer beam structure is simplified, and many structural components, such as horizontal beams and columns, are not required to achieve high integration.

[0007] In a specific implementable solution, the electric drive assembly includes a transmission half shaft configured to transmit power. To facilitate the transmission half shaft's passage, a first via extending through the first longitudinal beam in the vehicle width direction is provided at a position on the first longitudinal beam corresponding to the electric drive assembly, and the transmission half shaft passes through the first via. Alternatively, a second via extending through the second longitudinal beam in the vehicle width direction is provided at a position on the second longitudinal beam corresponding to the electric drive assembly, and the transmission half shaft passes through the second via. In this manner, a steering gear may be disposed between the first and second longitudinal beams to provide the feasibility of implementing vertical spatial multiplexing, thereby reducing the structural height of the longitudinal beams and thereby reducing the floor height of the passenger compartment and increasing passenger compartment space.

[0008] In a specific implementation, during the vehicle's driving process, the transmission half shafts jump to a suitable extent, with the direction away from the electric drive assembly exhibiting a larger jump amplitude. Therefore, the inner diameter of the first via gradually increases in the direction away from the second longitudinal beam. For the same reason, the inner diameter of the second via gradually increases in the direction away from the first longitudinal beam.

[0009] In a specific implementable solution, the skateboard chassis further includes a plurality of first suspension swing arms and a plurality of second suspension swing arms for connecting the suspension to the primary vehicle frame. All of these first suspension swing arms are hingedly connected to the first longitudinal beam or horizontal beam. In the vertical direction, the protrusions of each of the first suspension swing arms overlap with the protrusions of the first longitudinal beam. This can implement spatial multiplexing in the vehicle width direction, reduce the occupied space, and increase the length of the first suspension swing arms. Similarly, these second suspension swing arms are hingedly connected to the second longitudinal beam or horizontal beam, and the protrusions of each of the second suspension swing arms overlap with the protrusions of the second longitudinal beam. This can also implement spatial multiplexing in the vehicle width direction, reduce the occupied space, and increase the length of the second suspension swing arms.

[0010] In a specific implementable solution, at least a portion of the first suspension swing arm is hinged to at least one surface of the first longitudinal beam positioned in the vertical direction. The first suspension swing arm is conveniently mounted on the surface of the first longitudinal beam, and the first suspension swing arm has a large moving space and a high degree of freedom. At least a portion of the second suspension swing arm is hinged to at least one surface of the second longitudinal beam in the vertical direction, which also has the above-mentioned effects.

[0011] In a specific implementable solution, the skateboard chassis further includes a steering gear. The steering gear includes a bar-shaped housing. To secure the steering gear, a first connecting structure is provided on the first longitudinal beam, and a second connecting structure is provided on the second longitudinal beam. The first connecting structure and the second connecting structure may be disposed opposite each other in the vehicle width direction, and the bar-shaped housing is connected between the first connecting structure and the second connecting structure to form one of the horizontal beams. This improves integration and simplifies the structure.

[0012] In a particular implementable solution, in order to reduce the occupied space in the vertical direction, the first connection structure is positioned on a surface of the first longitudinal beam facing the second longitudinal beam, and the second connection structure is positioned on a surface of the second longitudinal beam facing the first longitudinal beam, in this way spatial multiplexing is implemented in the vertical direction.

[0013] The first and second connecting structures may take multiple forms. To facilitate assembly and disassembly, the following specific forms are provided herein. In a specific implementable solution, the first connecting structure includes two first clamp plates that are parallel to each other, and the second connecting structure includes two second clamp plates that are parallel to each other. One end of the bar-shaped housing is detachably connected between the two first clamp plates, and the other end of the bar-shaped housing is detachably connected between the two second clamp plates. This facilitates assembly and disassembly in the vertical direction and restricts the bar-shaped housing in the vertical direction.

[0014] In a specific implementable solution, the steering gear further includes a steering tie rod extending from two ends of the bar-shaped housing. To provide a storage location for the steering tie rod and reduce the vertical space occupied, a first avoidance hole penetrating the first longitudinal beam in the vehicle width direction is provided at a position corresponding to the first connecting structure on the first longitudinal beam, whereby the steering tie rod passes through the first avoidance hole. Similarly, a second avoidance hole penetrating the second longitudinal beam in the vehicle width direction is provided at a position corresponding to the second connecting structure on the second longitudinal beam, whereby the steering tie rod passes through the second avoidance hole. In the case of a vehicle model with only one-sided steering, only the first avoidance hole or the second avoidance hole may be provided. According to the aforementioned solution, the electric drive assembly may be disposed between the first longitudinal beam and the second longitudinal beam to provide the feasibility for implementing vertical spatial multiplexing and reduce the structural height of the longitudinal beams, thereby reducing the floor height of the passenger cabin and increasing the space of the passenger cabin.

[0015] In a specific implementation, the steering tie rod bounces, and a greater distance from the bar-shaped housing indicates a greater bounce amplitude. Therefore, the inner diameter of the first escape hole gradually increases in the direction away from the second longitudinal beam. Similarly, the inner diameter of the second escape hole gradually increases in the direction away from the first longitudinal beam to provide a bounce space for the transmission half shaft.

[0016] In a specific implementable solution, a suspension support needs to be arranged to provide stable support for the electric drive assembly, where the suspension support is connected to the bar-shaped housing, and the electric drive assembly is connected to the suspension support through a support shaft, the suspension support having a support hole, and the support shaft being positioned within the support hole.

[0017] In a specific implementation solution, the bar-shaped housing and the suspension bracket are a single-piece casting structure. In this way, the single-piece casting structure can function as both the bar-shaped housing of the steering gear and the suspension support of the electric drive assembly. This reduces the processing difficulty and has high fitting precision.

[0018] In a specific implementable solution, when the skateboard chassis further includes a plurality of first suspension swing arms and a plurality of second suspension swing arms, at least a portion of the first suspension swing arms are hinged to the bar-shaped housing, widthwise spatial multiplexing can be implemented, and the length of the first suspension swing arms can be further increased. Similarly, at least a portion of the second suspension swing arms are hinged to the bar-shaped housing.

[0019] According to a second aspect, a vehicle is provided. The vehicle includes an upper vehicle body and a skateboard chassis according to any one of the aforementioned technical solutions. The upper vehicle body is connected to the first longitudinal beam and the second longitudinal beam. For the beneficial effects of the vehicle, please refer to the effects of the skateboard chassis provided in the aforementioned technical solutions. [Brief explanation of the drawings]

[0020] [Figure 1] 1 illustrates a vehicle according to an embodiment of the present application. [Figure 2] 1A and 1B are diagrams of the structure of the rear section of the primary vehicle frame in some technical solutions; [Figure 3a] FIG. 1 is a three-dimensional view of a skateboard chassis according to an embodiment of the present application. [Figure 3b] FIG. 3b is a partial enlarged view of the rear section of the skateboard chassis shown in FIG. 3a. [Figure 4a] 3b is a principal view of the skateboard chassis shown in FIG. 3a. [Figure 4b] FIG. 4b is a partial enlarged view of the rear section of the skateboard chassis shown in FIG. 4a. [Figure 4c] FIG. 4b is an enlarged view of the cross section taken along the line AA in FIG. 4b. [Figure 5a] FIG. 3b is a top view of the skateboard chassis shown in FIG. 3a. [Figure 5b] FIG. 5b is a partial enlarged view of the rear section of the skateboard chassis shown in FIG. 5a. [Figure 6a] FIG. 3b is a bottom view of the skateboard chassis shown in FIG. 3a. [Figure 6b] FIG. 6b is a partial enlarged view of the rear section of the skateboard chassis shown in FIG. 6a. DETAILED DESCRIPTION OF THE INVENTION

[0021] To make the objectives, technical solutions and advantages of the present application clearer, the following further describes the present application in detail with reference to the accompanying drawings.

[0022] To provide a clearer understanding of the following, some concepts are briefly explained below.

[0023] The primary vehicle frame is a frame structure located in the lower portion of the upper vehicle body and running through the vehicle from front to rear, including a front section, a middle section, and a rear section. The primary vehicle frame is used to support and connect the various assemblies of the vehicle, such as the upper vehicle body, chassis, power battery, and systems such as the electric drive, to ensure that each assembly is in place and can withstand various loads both inside and outside the vehicle.

[0024] The front section of the primary vehicle frame is the area of ​​the primary vehicle frame used to support the front drive system and connected to the front suspension or wheels, and is the portion of the primary vehicle frame located forward of the firewall or front torque box.

[0025] The mid-section of the primary vehicle frame is the area of ​​the primary vehicle frame used to support the battery pack system and connected to the passenger compartment of the upper vehicle body, and is the portion of the primary vehicle frame located between the front and rear torque boxes.

[0026] The rear section of the primary vehicle frame is the area of ​​the primary vehicle frame used to support the rear drive system and connected to the rear suspension or wheels, and is the portion of the primary vehicle frame located rearward of the rear torque box.

[0027] To facilitate understanding of the skateboard chassis provided in the embodiments of the present application, an application scenario of the skateboard chassis will first be described. FIG. 1 illustrates a vehicle according to an embodiment of the present application. The application scenario of the skateboard chassis according to an embodiment of the present application can be understood from FIG. 1. As shown in FIG. 1, the skateboard chassis 01 may be used in an entire vehicle and is used as a carrier for the upper vehicle body 02. Compared with a conventional chassis, the skateboard chassis 01 has complete functionality, such as basic functions such as independent driving, control, acceleration, and deceleration, and also has several security and intelligent attributes. The skateboard chassis 01 includes a primary vehicle frame for supporting related components for implementing the aforementioned functions. The upper vehicle body 02 and the skateboard chassis 01 are manufactured separately. After the upper vehicle body 02 and the skateboard chassis 01 are separately formed, the upper vehicle body 02 is assembled above the skateboard chassis 01 and fixed to the primary vehicle frame. The wheels 03 are mounted separately in a vehicle width direction X of the skateboard chassis 01 (see FIG. 3a below), which is the width direction of the vehicle.

[0028] In some technical solutions, the rear section of the primary vehicle frame splits the longitudinal beam into a two-layer beam structure, with the two-layer horizontal beams connected to the corresponding two-layer longitudinal beams. Figure 2 shows the structure of the rear section of the primary vehicle frame in some technical solutions. As shown in Figure 2, the longitudinal beam 102 splits into an upper secondary longitudinal beam 102a and a lower secondary longitudinal beam 102b in the rear section, with the secondary longitudinal beam 102a connected to the secondary longitudinal beam 102b through a vertically extending connecting beam 102c. The longitudinal beam 103 splits into an upper secondary longitudinal beam 103a and a lower secondary longitudinal beam 103b in the rear section, with the secondary longitudinal beam 103a connected to the secondary longitudinal beam 103b through a vertically extending connecting beam 103c.

[0029] The free end of the secondary longitudinal beam 102a is connected to the free end of the secondary longitudinal beam 103a through the capping horizontal beam 101, the branching point of the longitudinal beam 102 is connected to the branching point of the longitudinal beam 103 through the horizontal beam 104c, the end of the secondary longitudinal beam 102b is connected to the end of the secondary longitudinal beam 103b through the horizontal beam 104b, and the middle of the secondary longitudinal beam 102a is connected to the middle of the secondary longitudinal beam 103a through the horizontal beam 104a. The horizontal beams 104a and 104b are vertically spaced. The space between the horizontal beams 104a and 104b is used to position the electric drive assembly. However, due to the blockage of the horizontal beam 104a positioned above, the electric drive assembly cannot be assembled from above. As a result, the installation work is cumbersome and production efficiency is low. Due to the block of the horizontal beam 104b located below, it is inconvenient to disassemble from the bottom, which is inconvenient for after-sales maintenance.

[0030] With this in mind, embodiments of the present application provide a skateboard chassis.

[0031] FIG. 3a is a three-dimensional view of a skateboard chassis according to an embodiment of the present application, and FIG. 3b is a partial enlarged view of the rear section of the skateboard chassis shown in FIG. 3a. Referring to FIGS. 3a and 3b, the skateboard chassis includes a primary vehicle frame 1 and an electric drive assembly 32. The primary vehicle frame 1 includes a first longitudinal beam 11, a second longitudinal beam 12, and a plurality of horizontal beams. It should be understood that the phrase "longitudinal beam" in the embodiments of the present application, such as the first longitudinal beam 11 and the second longitudinal beam 12, refers only to the profiled beam structure and does not include any other attachments connected to the beam structure. Interfaces for connecting with the upper vehicle body 02 may be provided on the top and side surfaces of the first longitudinal beam 11, the second longitudinal beam 12, and the horizontal beams. These interfaces may be bolt holes for implementing bolted connections. However, structures such as welded interfaces and riveted interfaces may alternatively be provided. The primary vehicle frame 1 may be integrally cast and formed as a whole. The first longitudinal beam 11 and the second longitudinal beam 12 generally extend in a longitudinal direction Y, which is the front-to-rear direction of the vehicle. Additionally, the first longitudinal beam 11 and the second longitudinal beam 12 may be spaced apart in the vehicle width direction X, arranged side by side, and symmetrically arranged about the central axis L. A plurality of horizontal beams are connected between the first longitudinal beam 11 and the second longitudinal beam 12 and are spaced apart in the longitudinal direction Y.

[0032] The portion of the primary vehicle frame 1 positioned between boundary lines M1 and M2 is the front section of the primary vehicle frame 1, the portion of the primary vehicle frame 1 positioned between boundary lines M2 and M3 is the middle section of the primary vehicle frame 1, and the portion of the primary vehicle frame 1 positioned between boundary lines M3 and M4 is the rear section of the primary vehicle frame 1. The front section, middle section, and rear section of the primary vehicle frame 1 correspond one-to-one in position to the front section, middle section, and rear section of the entire skateboard chassis 01. The middle section of the first longitudinal beam 11 is the portion of the first longitudinal beam 11 that is positioned at the middle section of the primary vehicle frame 1. Other similar explanations can be inferred by analogy. For example, the front section of the second longitudinal beam 12 is the portion of the second longitudinal beam 12 that is positioned at the front section of the primary vehicle frame 1. The distance between the middle section of the first longitudinal beam 11 and the middle section of the second longitudinal beam 12 is greater than the distance between the front section of the first longitudinal beam 11 and the front section of the second longitudinal beam 12, and is greater than the distance between the rear section of the first longitudinal beam 11 and the rear section of the second longitudinal beam 12. The middle sections of the first longitudinal beam 11 and the middle sections of the second longitudinal beam 12 are close to each other in the portions adjacent to the front sections to reduce the distance, and the close portions of the first longitudinal beam 11 and the second longitudinal beam 12 gradually rise to implement a transition connection to the front section, which is positioned at a higher position. The middle sections of the first longitudinal beam 11 and the middle sections of the second longitudinal beam 12 are close to each other in the portions adjacent to the rear sections to reduce the distance, and then implement a transition connection to the front section.

[0033] The multiple horizontal beams include a capping horizontal beam 21, a capping horizontal beam 23, a reinforcing horizontal beam 24, an auxiliary horizontal beam 25, and five mid-section horizontal beams 22. The free end of the front section of the first longitudinal beam 11 is connected to the free end of the front section of the second longitudinal beam 12 through the capping horizontal beam 21, and the free end of the rear section of the first longitudinal beam 11 is connected to the free end of the rear section of the second longitudinal beam 12 through the capping horizontal beam 22. Both the reinforcing horizontal beam 24 and the auxiliary horizontal beam 25 are connected between the middle portion of the rear section of the first longitudinal beam 11 and the middle portion of the rear section of the second longitudinal beam 12, and the auxiliary horizontal beam 25 is located on the side of the reinforcing longitudinal beam 24 away from the capping horizontal beam 21 and close to the middle section of the primary vehicle frame 1. The five mid-section horizontal beams 22 are connected between parallel portions of the mid-section of the first longitudinal beam 11 and the mid-section of the second longitudinal beam 12, and the five mid-section horizontal beams 22 are equally spaced apart in the longitudinal direction Y. In this way, the weight above the mid-section is evenly and stably supported. The number of mid-section horizontal beams 22 is not limited to five, and may alternatively be 3, 4, 6, 7, 8, or another number. The number of mid-section horizontal beams 22 is specifically determined based on the length of the mid-section of the skateboard chassis 02 and the supporting weight requirements.

[0034] The cross section of the first longitudinal beam 11 may be substantially rectangular, and includes an upper surface and a lower surface that are opposite each other in the vertical direction Z, and an outer surface and an inner surface that are opposite each other in the vehicle width direction X. The inner surface is the surface that is closer to the second longitudinal beam 12, and the outer surface is the surface that is farther from the second longitudinal beam 12. The vertical direction Z is the height direction of the vehicle. The cross section of the second longitudinal beam 12 has a similar shape. The inner surface of the second longitudinal beam 12 faces the first longitudinal beam 11, and the outer surface of the second longitudinal beam 12 faces away from the first longitudinal beam 11.

[0035] There is no secondary vehicle frame on the skateboard chassis 01, and the primary vehicle frame 1 may be manufactured by using a one-piece molding process, for example, by using a high-pressure casting process, or by forming the longitudinal beams and horizontal beams separately and then assembling them through welding, riveting, bolting, etc., or by mixing the two aforementioned processes, i.e., some structures are formed integrally, for example, parts other than the capping horizontal beam 21 and the capping horizontal beam 23 are formed integrally, and then other structures are assembled thereafter.

[0036] The electric drive assembly 32 is positioned between the first longitudinal beam 11 and the second longitudinal beam 12 and between the auxiliary horizontal beam 25 and the reinforcing horizontal beam 24 to implement spatial multiplexing in the vertical Z direction. In addition, because the rear sections of the first longitudinal beam 11 and the second longitudinal beam 12 are both single-layer beam structures in the vertical Z direction, the rear section of the primary vehicle frame 1 does not occupy much space in the vertical Z direction, and the horizontal beams do not block the electric drive assembly 32. When the skateboard chassis 01 is assembled, the electric drive assembly 32 may be mounted from top to bottom in the vertical Z direction, which reduces the difficulty of the installation work, improves production efficiency, and improves assembly accuracy. Because there is no horizontal beam block below, the electric drive assembly 32 can be easily removed from below for easy after-sales maintenance. Compared with the double-layer longitudinal beam structure, the single-layer beam structure is simplified, and many structural components such as horizontal beams and columns are not required to achieve high integration. The single-layer beam structure means that there is only a single-layer structure in the vertical direction Z, and there are no branches of secondary longitudinal beams of two or more layers in the vertical direction Z.

[0037] A steering gear 31 is provided at a connection position between the rear section and the mid-section of the primary vehicle frame 1. The steering gear 31 includes a bar-shaped housing 312. For example, the bar-shaped housing 312 is rectangular parallelepiped-shaped. Specifically, the bar-shaped housing 312 may be integrally cast. Specifically, the bar-shaped housing 312 may be formed through mold casting, or the side walls of the bar-shaped housing 312 may be first manufactured separately and then welded or riveted to form a closed housing through assembly. The bar-shaped housing 312 does not necessarily have to be rectangular parallelepiped-shaped, as long as it is a generally elongated bar-shaped structure. For example, the cross section of the bar-shaped housing 312 may be circular, trapezoidal, or regular hexagonal, allowing the bar-shaped housing 312 to support a horizontal beam and accommodate the components of the steering gear 31. The structural strength of the bar-shaped housing 312 can be enhanced by increasing the thickness of the bar-shaped housing 312, and the bar-shaped housing 312 can be used as a mechanical part of the primary vehicle frame 1. There is a first connecting structure 110 connected to an end of the rear section of the first longitudinal beam 11 that is close to the middle section, and the first connecting structure 110 is positioned on a surface of the first longitudinal beam 11 that faces the second longitudinal beam 12 (the inner surface of the first longitudinal beam 11), and the partial surface of the first longitudinal beam 11 that is connected to the first connecting structure 110 is, for example, parallel to the YOZ plane. The second connecting structure 120 is connected to an end of the second longitudinal beam 12 adjacent to the middle section in the rear section, and the second connecting structure 120 is positioned on a surface of the second longitudinal beam 12 facing the first longitudinal beam 11 (the inner surface of the second longitudinal beam 12), and a partial surface of the second longitudinal beam 12 connected to the second connecting structure 120 is, for example, parallel to the Y-O-Z plane. In this way, the first connecting structure 110 and the second connecting structure 120 are arranged opposite each other in the vehicle width direction X to suppress tilt of the auxiliary horizontal beam 25. For example, the first connecting structure 110 includes a first clamp plate 111 and a second clamp plate 112 arranged in parallel.The first clamp plate 111 and the second clamp plate 112 may be fixed to the first longitudinal beam 11 through welding, provided that the first clamp plate 111 and the second clamp plate 112 can be fixed to the first longitudinal beam 11 separately. However, the fixing method is not limited to welding and may be fixed through riveting, for example. Alternatively, when the primary vehicle frame 1 is manufactured, the first clamp plate 111 and the second clamp plate 112 are each cast integrally with the first longitudinal beam 11 directly, which provides good structural stability, a simple process, and accurate size and position. The second connecting structure 120 includes a third clamp plate 121 and a fourth clamp plate 122 arranged in parallel. The third clamp plate 121 and the fourth clamp plate 122 may be fixed to the second longitudinal beam 12 through welding. The first clamp plate 111, the second clamp plate 112, the third clamp plate 121, and the fourth clamp plate 122 are all parallel to the XOZ plane, for example, but may alternatively be inclined relative to the XOZ plane to accommodate bar-shaped housings 312 of various cross-sectional shapes. The distance between the first clamp plate 111 and the second clamp plate 112 is slightly greater than the distance between two opposite surfaces of the bar-shaped housing 312 arranged in the longitudinal direction Y, and the bar-shaped housing 312 extends in the vehicle width direction X. One end of the bar-shaped housing 312 is placed between the first clamp plate 111 and the second clamp plate 112 and separately contacts the first clamp plate 111 and the second clamp plate 112 through the corresponding surfaces, firmly restricting the bar-shaped housing 312 in the longitudinal direction Y and reducing tipping problems caused by rotation of the bar-shaped housing 312 around its axis. There is a large gap between the bar-shaped housing 312 and the first clamp plate 111 or the second clamp plate 112, which causes vibration and noise.The first clamp plate 111, the bar-shaped housing 312, and the second clamp plate 112 are connected by threads through a first bolt 113, which passes through them in sequence, securing the bar-shaped housing 312 in the vertical direction Z. However, it should be understood that the manner in which the bar-shaped housing 312 is secured by the bolt is not limited. As long as the bar-shaped housing 312 can be detachably connected between the first clamp plate 111 and the second clamp plate 112, a clamping method in which grooves and protrusions cooperate with each other, an interference fit, or the like may alternatively be used, thereby enabling easy disassembly and assembly to facilitate after-sales maintenance and replacement. The other end of the bar-shaped housing 312 is secured between the third clamp plate 121 and the fourth clamp plate 122 in a similar manner through a second bolt 123. As described above, the bar-shaped housing 312 is connected between the first connecting structure 110 and the second connecting structure 120, reinforces the connection between the first longitudinal beam 11 and the second longitudinal beam 12, improves the fixing effect between the first longitudinal beam 11 and the second longitudinal beam 12, and increases the load-carrying capacity of the skateboard chassis 01.

[0038] The bar-shaped housing 312 used as the auxiliary horizontal beam 25 is supported between the first longitudinal beam 11 and the second longitudinal beam 12, and the bar-shaped housing 312 and the auxiliary horizontal beam 25 are integrated. This helps to improve the integration and compactness of the system, improve space utilization, reduce the number of parts, simplify the structure of the skateboard chassis 01, and reduce costs. In addition, there is no need to find additional space to place the steering gear 31, which frees up space for assembling other devices and improves the utilization of the space between the first longitudinal beam 11 and the second longitudinal beam 12.

[0039] The first clamp plate 111, the second clamp plate 112, the third clamp plate 121, and the fourth clamp plate 122 all do not restrict the position of the bar-shaped housing 312 in the vertical direction Z, so when the steering gear 31 is assembled, the bar-shaped housing 312 is assembled from top to bottom in the Z direction between the first clamp plate 111 and the second clamp plate 112 and between the third clamp plate 121 and the fourth clamp plate 122, and fixed through the first bolt 113 and the second bolt 123. When the steering gear 31 needs to be repaired or replaced, the first bolt 113 and the second bolt 123 are disassembled and the bar-shaped housing 312 is removed in the vertical direction Z, which makes after-sale repair and replacement convenient.

[0040] The first clamp plate 111 and the second clamp plate 112 are connected to the surface of the first longitudinal beam 11 facing the second longitudinal beam 12, rather than to the upper and lower surfaces of the first longitudinal beam 11 positioned in the vertical direction Z. The third clamp plate 121 and the fourth clamp plate 122 are similar. In this way, the steering gear 31 and each of the first longitudinal beam 11 and the second longitudinal beam 12 implement spatial multiplexing in the vertical direction Z. This helps to reduce the overall thickness of the skateboard chassis 01 or provides space for vertically arranging other components. In addition, this helps to secure vertical arrangement space on the upper and lower surfaces of the first longitudinal beam 11 and the second longitudinal beam 12 for arranging suspension swing arms (e.g., the lower first suspension swing arms 26a and 26b and the second suspension swing arms 27a and 27b).

[0041] A first avoidance hole T1 penetrating the first longitudinal beam 11 in the vehicle width direction X is provided in a portion of the first longitudinal beam 11 positioned between the first clamp plate 111 and the second clamp plate 112, and a second avoidance hole T2 penetrating the second longitudinal beam 12 in the vehicle width direction X is provided in a portion of the second longitudinal beam 12 positioned between the third clamp plate 121 and the fourth clamp plate 122. The steering gear 31 further includes steering tie rods 313 extending from two ends of the bar-shaped housing 312 in the vehicle width direction X. The steering tie rod 313 passes through the first and second avoidance holes T1 and T2, respectively, in the vehicle width direction X and extends into the space outside the first and second longitudinal beams 11 and 12, providing the possibility of arranging the bar-shaped housing 312 between the first and second longitudinal beams 11 and 12, thereby implementing spatial multiplexing in the vertical direction Z and reducing the height of the longitudinal beam structure. In this way, the floor height of the passenger compartment is reduced and the passenger compartment space is increased. Compared with the technical solution of FIG. 2, in which the steering tie rod of the steering gear needs to pass between the secondary longitudinal beams 103a and 103b and between the secondary longitudinal beams 102a and 102b, in this technical solution, the rear section of the skateboard chassis 001 occupies less space in the vertical direction Z. This helps simplify the structure of the primary vehicle frame 1. In addition to the case where both the first avoidance hole T1 and the second avoidance hole T2 are arranged, only the first avoidance hole T1 or the second avoidance hole T2 may be arranged for a vehicle model with steering only on one side.

[0042] An appropriate distance is maintained between the bar-shaped housing 312 and the first longitudinal beam 11 in the vehicle width direction X to form a first gap G1, and an appropriate distance is maintained between the bar-shaped housing 312 and the second longitudinal beam 12 in the vehicle width direction X to form a second gap G2. When the steering gear 31 is assembled, the two ends of the steering tie rod 313 are first bent appropriately and pass through the first avoidance hole T1 and the second avoidance hole T2. Then, the bar-shaped housing 312 is moved downward in the vertical direction Z, and the steering tie rod 313 gradually restores from the bent state to its natural state. If the first gap G1 and the second gap G2 do not exist, an accommodation space during bending is provided between the bar-shaped housing 312 and each of the first longitudinal beam 11 and the second longitudinal beam 12, and the steering tie rod 313 does not easily pass through the first avoidance hole T1 and the second avoidance hole T2.

[0043] In addition, both the first clamp plate 111 and the second clamp plate 112 may be parallel to the XOY plane, such that the first clamp plate 111 and the second clamp plate 112 are spaced apart from each other in the vertical direction Z. The third clamp plate 121 and the fourth clamp plate 122 are similarly spaced apart from each other in the vertical direction Z. In a manner similar to that of the embodiment corresponding to FIG. 3 a, one end of the bar-shaped housing 312 is fixed between the first clamp plate 111 and the second clamp plate 112 through a first bolt 113, and the other end of the bar-shaped housing 312 is fixed between the third clamp plate 121 and the fourth clamp plate 122 through a second bolt 123. Thus, the steering gear 31 may be assembled and disassembled in the longitudinal direction Y. Regardless of the manner of fixing the bar-shaped housing 312, the first avoidance hole T1 may be arranged at a position corresponding to the first connecting structure 110, and the second avoidance hole T2 may be arranged at a position corresponding to the second connecting structure 12 on the second longitudinal beam 12 to avoid the steering tie rod 313.

[0044] Continuing to refer to FIG. 3b, the size of the position on the first longitudinal beam 11 corresponding to the first avoidance hole T1 is thickened in the vertical direction Z. Specifically, the wall above the first avoidance hole T1 may be thickened to form the first protrusion M1. The structural strength of the position corresponding to the first avoidance hole T1 is strengthened to counteract the effect of the placement of the first avoidance hole T1 on the structural strength of the first longitudinal beam 11 at that position. The surface of the first protrusion M1 away from the first avoidance hole T1 may be an arcuate surface and may smoothly transition with the area adjacent to the upper surface of the first longitudinal beam 11 to reduce stress concentration. The arcuate surface of the first protrusion M1 may be coaxial with the first avoidance hole T1, so that the thickness between the arcuate surface of the first protrusion M1 and the inner wall of the first avoidance hole T1 does not vary significantly in the longitudinal direction Y. This reduces stress concentration and improves structural stability. The first protrusions M1 may be arranged separately on two sides of the first escape hole T1 in the vertical direction Z, or the first protrusions M1 may be arranged separately on two sides of the first escape hole T1 in the vertical direction Z, which further enhances the structural strength. However, the first protrusions M1 may alternatively be held only on the upper side to keep the lower surface of the first longitudinal beam 11 flush. In addition, the first clamp plate 111 and the second clamp plate 112 are connected to the surface of the first longitudinal beam 11 facing the second longitudinal beam 12 and do not interfere with the first protrusions M1 on the upper surface of the first longitudinal beam 11. Therefore, the size of the first protrusions M1 in the longitudinal direction Y is not limited by the distance between the first clamp plate 111 and the second clamp plate 112, which can effectively enhance the structural strength of the first longitudinal beam 11 at that position.

[0045] Similarly, the second protrusion M2 may alternatively be formed above the second escape hole T2. The structure, related beneficial effects, and possible variations of the second protrusion M2 are to be referred to those of the first protrusion M1.

[0046] FIG. 4a is a main view of the skateboard chassis shown in FIG. 3a, FIG. 4b is a partial enlarged view of the rear section of the skateboard chassis shown in FIG. 4a, and FIG. 4c is an enlarged view of the cross section along the AA direction in FIG. 4b. As shown in FIG. 4c, the inner diameter of the second escape hole T2 gradually increases in a direction away from the first longitudinal beam 11 to form an expanded structure, conforming to the diverging structure formed by the multiple steering tie rods 313 and providing swing space for the steering tie rods 313 during the vehicle's running process to mitigate the problem of the steering tie rods 313 being damaged in a collision. Compared to a cylindrical hole having a diameter equal to the maximum inner diameter of the expanded structure, the solid structure ratio of the second longitudinal beam 12 may be increased in the portion with a small inner diameter of the expanded structure to provide swing space for the steering tie rods 313 while considering the structural strength of the second longitudinal beam 12. The inner diameter of the second escape hole T2 may be increased by a certain gradient. In this case, the generatrix of the inner wall of the second avoidance hole T2 is straight, which is suitable for the steering tie rod 313 made of a hard material and not easily deformed. Alternatively, the inner diameter of the second avoidance hole T2 may be increased by a gradually increasing inclination. In this case, the generatrix of the inner wall of the second avoidance hole T2 is curved, which may provide the steering tie rod 313 with a large swing space at the position of the large inner diameter, and the generatrix is ​​suitable for the steering tie rod made of a soft material and easily deformed. Similarly, in the direction away from the second longitudinal beam 12, the inner diameter of the first avoidance hole T1 may also be gradually increased to form an expanded structure. For the beneficial effect of the expanded structure, see the effect of the second avoidance hole T2.

[0047] Figure 5a is a top view of the skateboard chassis shown in Figure 3a, and Figure 5b is a partial enlarged view of the rear section of the skateboard chassis shown in Figure 5a. Referring to Figures 5a and 5b, the electric drive assembly 32 has transmission half shafts 322 extending toward two sides in the vehicle width direction X, and the first via U1 is disposed at a position corresponding to the electric drive assembly 32 on the first longitudinal beam 11, and the second via U2 is disposed at a position corresponding to the electric drive assembly 32 on the second longitudinal beam 12. The first via U1 penetrates the first longitudinal beam 11 in the vehicle width direction X, and the second via U2 penetrates the second longitudinal beam 12 in the vehicle width direction X. The first via U1 may be coaxial with the second via U2 in the vehicle width direction X. The transmission half shaft 322 penetrates the first via U1 and the second via U2 separately to output power. The first via U1 and the second via U2 may each have an extended structure. The inner diameter of the first via U1 at an end remote from the second longitudinal beam 12 is large, and the inner diameter of the second via U2 at an end remote from the first longitudinal beam 11 is large. For specific shapes and beneficial effects of the first via U1 and the second via U2, please refer to those of the second bypass hole T2. Similar to the first protrusion M1, the third protrusion M3 is provided on the upper surface of the first via U1 in the vertical direction Z, and the fourth protrusion M4 is provided on the upper surface of the second via U2 in the vertical direction Z. Alternatively, the third protrusion M3 may be positioned on the lower surface of the first longitudinal beam 11, and the fourth protrusion M4 may be positioned on the lower surface of the second longitudinal beam 12. The structure, function, and possible variations of the third protrusion M3 and the fourth protrusion M4 are similar to those of the first protrusion M1. In addition to the case where both the first via U1 and the second via U2 are disposed, only the first via U1 or only the second via U2 may be disposed.

[0048] Fig. 6a is a bottom view of the skateboard chassis shown in Fig. 3a, and Fig. 6b is a partial enlarged view of the rear section of the skateboard chassis shown in Fig. 6a. Referring to Fig. 6a and Fig. 6b, the electric drive assembly 32 has a support shaft 321 extending in the longitudinal direction Y, and the bar-shaped housing 312 is connected to a suspension support 314, which has a support hole 311 penetrating in the longitudinal direction Y. The support shaft 321 is positioned within the support hole 311. In addition, an interference fit is implemented between the support shaft 321 and the support hole 311 through a soft pad to stably fix the support shaft 321 and implement buffering. Specifically, a receiving groove 315 penetrating in the longitudinal direction Y is formed in the lower surface of the bar-shaped housing 312. The inner wall of the receiving groove 315 is an arcuate surface. The suspension support 314 is a cylindrical structure whose axis extends in the longitudinal direction Y. The support hole 311 is a circular channel coaxial with the cylindrical structure. The circumferential surface of the suspension support 314 is fitted to and attached to the inner wall of the receiving groove 315. The suspension support 314 partially protrudes from the receiving groove 315, and the suspension support 314 and the receiving groove 315 may be fixed by welding. In this way, the contact area between the suspension support 314 and the bar-shaped housing 312 can be increased, and the fixing stability can be improved. Additionally, the suspension support 314 and the bar-shaped housing 312 implement spatial multiplexing in the vertical direction Z to provide a condition for the electric drive assembly 32 to properly implement spatial multiplexing with the first longitudinal beam 11 and the second longitudinal beam 12 at a position in the vertical direction Z. This helps to reduce the thickness of the rear section of the skateboard chassis 01. Additionally, in the longitudinal direction Y, the length of the suspension support 314 is shorter than the length of the accommodation groove 315, and the suspension support 314 is positioned at the end of the accommodation groove 315 away from the electric drive assembly 32.

[0049] Additionally, the electric drive assembly 32 may also be connected to the reinforcing horizontal beam 24 in a similar manner, or may be removably connected to the reinforcing horizontal beam 24 via bolts or otherwise.

[0050] However, the suspension support 314 may alternatively be connected to the bar-shaped housing 312 in another manner to support the electric drive assembly 32. A specific connection method may be as follows: when the bar-shaped housing 312 is cast, the suspension support 314 may be molded to form the support hole 311, so that the bar-shaped housing 312 and the suspension support 314 form an integrated cast structure. The structure may have the functions of both the bar-shaped housing 312 and the suspension support 314, and has high connection stability, a simple manufacturing process, and high structural manufacturing precision. Alternatively, the suspension support 314 may be fixed to the bar-shaped housing 312 through welding, riveting, or the like, or may be detachably connected to the bar-shaped housing 312 through bolts or the like.

[0051] 3b and 5b, two first suspension swing arms 26a are provided on the upper surface of the first longitudinal beam 11 in the vertical direction Z. Specifically, the first suspension swing arms 26a are welded onto a pair of ear plates 26a' on the upper surface of the first longitudinal beam 11. The ear plates 26a' may also be integrally cast with the primary vehicle frame 1, and other ear plates may also be connected in this manner. The first suspension swing arms 26a are hingedly connected between the pair of ear plates 26a' through a pin shaft. In the vehicle width direction X, both of the two first suspension swing arms 26a extend in a direction away from the second longitudinal beam 12. In addition, the ends of the first suspension swing arms 26a that are away from the first longitudinal beam 11 are free ends. The free ends are configured to connect to a suspension, and are connected to a wheel through the suspension, and are positioned on the side of the first longitudinal beam 11 that faces away from the second longitudinal beam 12. In the direction away from the second longitudinal beam 12, the two first suspension swing arms 26a extend toward each other; in other words, in the longitudinal direction Y, the two first suspension swing arms 26a are inclined toward each other to form an acute angle. The acute angle is used to connect to the same suspension and provide the suspension with balanced forces in the longitudinal direction Y. The ear plate 26a' of one first suspension swing arm 26a is positioned between the first protrusion M1 and the third protrusion M3 to fully utilize the flat surface between the first protrusion M1 and the third protrusion M3, while the ear plate 26a' of the other first suspension swing arm 26a is positioned on the side of the third protrusion M3 away from the first protrusion M1 to improve system integration, compactness of the arrangement, and space utilization. However, the first suspension swing arm 26a is not limited to being hinged to the first longitudinal beam 11 through the ear plate 26a', and the ear plate 26a' is simply used as a form of hinge base.The first suspension swing arm 26a may alternatively be hinged to the first longitudinal beam 11 through another structure fixed to the first longitudinal beam 11 and used as a hinge base.

[0052] Both of the two first suspension swing arms 26a are hinged to the upper surface of the first longitudinal beam 11 in the vertical direction Z, and are not hinged to a surface of the first longitudinal beam 11 away from the second longitudinal beam 12. This saves space in the vehicle width direction X, alleviates the problem of the suspension occupying the vehicle width direction X, increases the design space of the suspension system in the vertical direction Z, alleviates the problem of limiting the length of the first suspension swing arms 26a, and improves the dynamic control performance of the vehicle.

[0053] Similarly, two second suspension swing arms 27a may be provided on the upper surface of the second longitudinal beam 11 in the vertical direction Z, and the two second suspension swing arms 27a may be symmetrical to the two first suspension swing arms 26a, respectively, with respect to the central axis L. For the specific structure and effect analysis of the second suspension swing arms 27a, please refer to that of the first suspension swing arm 26a.

[0054] 3b and 6b, the first suspension swing arm 26b is hinged to a lower surface of the first longitudinal beam 11 in the vertical direction Z, and the first suspension swing arm 26c is hinged to a lower surface of the bar-shaped housing 312 that is close to the first longitudinal beam 11. In a direction away from the second longitudinal beam 12, the first suspension swing arm 26b and the first suspension swing arm 26c extend towards each other and are configured to connect together through their free ends to one suspension, for example, two first suspension swing arms 26a.

[0055] Similarly, a second suspension swing arm 27b, which is symmetrical to the first suspension swing arm 26b about the central axis L, is hinged to a lower surface of the first longitudinal beam 11, and a second suspension swing arm 27c, which is symmetrical to the first suspension swing arm 26c about the central axis L, is hinged to a lower surface of the bar-shaped housing 312 adjacent to the second longitudinal beam 12. The second suspension swing arm 27b and the second suspension swing arm 27c are adjacent to each other and are configured to be connected together to one suspension, for example, two second suspension swing arms 27a, to that suspension.

[0056] Each of the first suspension swing arm 26c and the second suspension swing arm 27c may alternatively be hinged to another surface of the bar-shaped housing 312. Regardless of which surface of the bar-shaped housing 312 each of the first suspension swing arm 26c and the second suspension swing arm 27c is hinged to, in the vertical direction Z, the protrusion of the first suspension swing arm 26c overlaps with the protrusion of the first longitudinal beam 11, and the protrusion of the second suspension swing arm 27c overlaps with the protrusion of the second longitudinal beam 12. In this way, spatial multiplexing is implemented in the vehicle width direction X.

[0057] However, depending on the configuration of various suspension hard points, the connection method of the first suspension swing arm and the second suspension swing arm is not limited to the above method. When the protrusion of the first suspension swing arm overlaps with the protrusion of the first longitudinal beam 11 in the vertical direction Z, space in the vehicle width direction X can be saved. This alleviates the problem of the limited length of the first suspension swing arm and improves the dynamic control performance of the vehicle. Similarly, the protrusion of the second suspension swing arm also overlaps with the protrusion of the second longitudinal beam 12 in the vertical direction Z.

[0058] In addition, the number of first suspension swing arms and the number of second suspension swing arms are not limited to the numbers shown in the figure, but depend on the case where the suspension can be stably supported. In addition, the first suspension swing arms may be arranged only on the upper surface or the lower surface of the first longitudinal beam 11, and the second suspension swing arms may be arranged only on the upper surface or the lower surface of the second longitudinal beam 12.

[0059] In the above-described embodiment, structures such as the electric drive assembly 32, the bar-shaped housing 312 (auxiliary horizontal beam 25), the first suspension swing arm, and the second suspension swing arm are all located in the rear section of the primary vehicle frame 1. Alternatively, the above-described structures may be arranged in the front section of the primary vehicle frame 1 in a similar manner. In addition, the front sections of the first longitudinal beam 11 and the second longitudinal beam 12 are also single-layer beam structures correspondingly. Assuming that the above-described related technical principles are used, these structures may be adjusted to meet requirements such as the installation environment, device placement, and collision security of the front section of the primary vehicle frame 1.

[0060] Based on the structural form in which the skateboard chassis 01 and the upper vehicle body 02 are separated from each other, the structure of the primary vehicle frame 1 is simplified, the branched double-layer longitudinal beams are integrated into a single-layer longitudinal beam, the auxiliary horizontal beam 25 and the steering gear 31 are physically integrated, etc. This reduces the structural complexity, simplifies the manufacturing process, and improves space utilization.

[0061] Based on the same inventive concept, one embodiment of the present application further provides a vehicle. As shown in Fig. 1, the vehicle provided in this embodiment of the present application includes a skateboard chassis 01 and an upper vehicle body 02. The upper vehicle body 02 is positioned above the skateboard chassis 01 and connected to a first longitudinal beam 11 and a second longitudinal beam 12, or may be connected to an interface at another position on the primary vehicle frame 1 to form the entire vehicle. For the beneficial effects of the vehicle, please refer to the effects of the skateboard chassis 01 provided in the previous embodiment.

[0062] The above description is merely a specific implementation of the present application and is not intended to limit the scope of protection of the present application. Any variations or replacements that can be easily conceived by those skilled in the art within the technical scope disclosed in the present application shall fall within the scope of protection of the present application. Therefore, the scope of protection of the present application shall be subject to the scope of protection of the claims. [Explanation of symbols]

[0063] 01 skateboard chassis, 02 upper vehicle body, 03 wheels, 1 primary vehicle frame, 11 first longitudinal beam, 12 second longitudinal beam, 21 capping horizontal beam, 22 mid-section horizontal beam, 23 capping horizontal beam, 24 reinforcing horizontal beam, 25 auxiliary horizontal beam, 26a first suspension swing arm, 26a' ear plate, 26b first suspension swing arm, 26c first suspension swing arm, 27a second suspension swing arm, 27b second suspension swing arm, 27c second suspension swing arm, 31 steering gear, 32 electric drive assembly, 101 capping horizontal beam, 102 longitudinal beam, 102a upper secondary longitudinal beam, 102b lower secondary longitudinal beam, 102c connecting beam, 103 longitudinal beam, 103a Upper secondary longitudinal beam, 103b Lower secondary longitudinal beam, 103c Connecting beam, 104a Horizontal beam, 104b Horizontal beam, 104c Horizontal beam, 110 First connecting structure, 111 First clamping plate, 112 Second clamping plate, 113 First bolt, 120 Second connecting structure, 121 Third clamping plate, 122 Fourth clamping plate, 123 Second bolt, 311 Support hole, 312 Bar-shaped housing, 313 Steering tie rod, 314 Suspension support, 315 Receiving groove, 321 Support shaft, 322 Transmission half shaft, G1 First gap, G2 Second gap, L Central axis, M1 Boundary line, First protrusion, M2 Boundary line, Second protrusion, M3 Boundary line, Third protrusion, M4 Boundary line, Fourth protrusion, T1 First avoidance hole, T2 Second avoidance hole, U1 first via, U2 second via, X vehicle width direction, Y longitudinal direction, Z vertical direction

Claims

1. 1. A skateboard chassis comprising: a primary vehicle frame; and an electric drive assembly, wherein the primary vehicle frame comprises a first longitudinal beam, a second longitudinal beam, and a plurality of horizontal beams, the first longitudinal beam and the second longitudinal beam being spaced apart across the width of the vehicle, each of the horizontal beams being connected between the first longitudinal beam and the second longitudinal beam, the plurality of horizontal beams being spaced apart, and the electric drive assembly is disposed between a front section of the first longitudinal beam and a front section of the second longitudinal beam, and both the front section of the first longitudinal beam and the front section of the second longitudinal beam are single-layer beam structures; or A skateboard chassis, wherein the electric drive assembly is disposed between a rear section of the first longitudinal beam and a rear section of the second longitudinal beam, and both the rear section of the first longitudinal beam and the rear section of the second longitudinal beam are single-layer beam structures.

2. the electric drive assembly having a transmission half shaft; and a first via extending through the first longitudinal beam in the vehicle width direction is formed on the first longitudinal beam at a position corresponding to the electric drive assembly, and the transmission half shaft extends through the first via; and / or 2. The skateboard chassis of claim 1, wherein a second via extending through the second longitudinal beam in the vehicle width direction is formed on the second longitudinal beam at a position corresponding to the electric drive assembly, and the transmission half shaft extends through the second via.

3. an inner diameter of the first via gradually increases in a direction away from the second longitudinal beam; and The skateboard chassis of claim 2 , wherein an inner diameter of the second via gradually increases in a direction away from the first longitudinal beam.

4. the skateboard chassis further comprises a plurality of first suspension swing arms and a plurality of second suspension swing arms, the first suspension swing arms being hingedly connected to the first longitudinal beam or the horizontal beam, and the second suspension swing arms being hingedly connected to the second longitudinal beam or the horizontal beam; and 2. The skateboard chassis of claim 1, wherein in the vertical direction, each protrusion of the first suspension swing arm overlaps with a protrusion of the first longitudinal beam, and each protrusion of the second suspension swing arm overlaps with a protrusion of the second longitudinal beam.

5. at least a portion of the first suspension swing arm is hinged to at least one surface of the first longitudinal beam positioned in the vertical direction; and 5. The skateboard chassis of claim 4, wherein at least a portion of said second suspension swing arm is hinged to at least one surface of said second longitudinal beam positioned in said vertical direction.

6. The first longitudinal beam is provided with a first connection structure, and the second longitudinal beam is provided with a second connection structure, the first connection structure and the second connection structure being arranged opposite each other in the vehicle width direction; and 6. The skateboard chassis of claim 1, further comprising a steering gear, the steering gear comprising a bar-shaped housing, the bar-shaped housing being connected between the first connecting structure and the second connecting structure to form one of the horizontal beams.

7. 7. The skateboard chassis of claim 6, wherein the first connecting structure is positioned on a surface of the first longitudinal beam facing the second longitudinal beam, and the second connecting structure is positioned on a surface of the second longitudinal beam facing the first longitudinal beam.

8. the first connecting structure comprises two first clamping plates parallel to each other, the second connecting structure comprises two second clamping plates parallel to each other, and 8. The skateboard chassis of claim 7, wherein one end of the bar-shaped housing is detachably connected between the two first clamp plates, and the other end of the bar-shaped housing is detachably connected between the two second clamp plates.

9. the steering gear further comprises a steering tie rod extending from two ends of the bar-shaped housing; and a first bypass hole passing through the first longitudinal beam in the vehicle width direction is provided at a position on the first longitudinal beam corresponding to the first connecting structure, and the steering tie rod passes through the first bypass hole; and / or 8. The skateboard chassis of claim 7, wherein a second avoidance hole penetrating the second longitudinal beam in the vehicle width direction is provided at a position on the second longitudinal beam corresponding to the second connection structure, and the steering tie rod passes through the second avoidance hole.

10. an inner diameter of the first escape hole gradually increases in the direction away from the second longitudinal beam; and The skateboard chassis of claim 9 , wherein an inner diameter of the second escape hole gradually increases in the direction away from the first longitudinal beam.

11. 7. The skateboard chassis of claim 6, wherein the bar-shaped housing is connected to a suspension support, the suspension support having a support hole, the electric drive assembly is connected to a support shaft, and the support shaft is positioned within the support hole.

12. The skateboard chassis of claim 11 , wherein the bar-shaped housing and the suspension support are of one-piece cast construction.

13. 7. The skateboard chassis of claim 6, wherein when the skateboard chassis further comprises the plurality of first suspension swing arms and the plurality of second suspension swing arms, at least a portion of the first suspension swing arms is hingedly connected to the bar-shaped housing, and at least a portion of the second suspension swing arms is hingedly connected to the bar-shaped housing.

14. A vehicle comprising an upper vehicle body and a skateboard chassis according to any one of claims 1 to 13, The vehicle, wherein the upper vehicle body is secured to the first longitudinal beam and the second longitudinal beam.

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