Light commercial vehicle electric skateboard chassis and vehicle

Abstract

The invention provides an electric skateboard chassis of a light commercial vehicle. The electric skateboard chassis comprises a frame, a domain control battery pack, an electric drive axle, an electric steering gear, a cooling module, a front suspension, a Chiller, a PTC, an electric compressor, a super kettle, a storage battery, a spare tire and a charging port. The frame longitudinal beam adopts a uniform-section uniform-width straight-through design; independent suspension fixing points and non-independent suspension fixing points are arranged on the frame longitudinal beams in an X direction in a staggered manner; the domain control battery pack adopts an integrated domain control pack PTC (Positive Temperature Coefficient) scheme; the domain control battery pack integrates a battery pack bracket, an all-in-one device, a VCU, an MCU and a BMS; a battery pack mounting cushion block is arranged on the lower wing surface of the frame longitudinal beam, and a domain control battery pack is mounted on the battery pack mounting cushion block through a bolt; the electric drive axle is a parallel shaft type coaxial electric drive axle. According to the method, the research and development cost and the production cost of new vehicle types are greatly reduced, personalized customization of consumers can be met, and rapid iteration of the vehicle types can be achieved.

Description

Technical Field

[0001] The present invention relates to the automotive field, and in particular to an electric skateboard chassis for a light commercial vehicle and a vehicle. Background Art

[0002] As the electrification of China's automotive market accelerates, the penetration of electrification in the light commercial vehicle market is also increasing. Currently, the majority of new energy light buses and light trucks on the market are still based on existing body and chassis platforms that have been retrofitted for electrification. Traditional gasoline-powered light buses and light trucks, due to different engine placements, cannot share a common chassis platform. However, in the electric vehicle era, without engine restrictions, sharing a common chassis platform is becoming increasingly feasible for electric light buses and light trucks.

[0003] The skateboard chassis is a customized vehicle manufacturing platform with an ultra-high degree of integration. The skateboard chassis and the upper part of the vehicle can be developed separately, but the existing technology lacks a skateboard chassis for light commercial vehicles. Summary of the Invention

[0004] In response to the defects in the existing technology, the purpose of the present invention is to provide a light commercial vehicle electric skateboard chassis and vehicle, aiming to significantly reduce the R&D cycle and R&D cost of new models, which can not only meet consumers' personalized customization but also achieve rapid iteration of models, while achieving the commonality of multiple components and reducing production costs.

[0005] In order to achieve the above-mentioned object of the invention, the present invention adopts the following technical solution:

[0006] According to a first aspect of the present invention, there is provided a light commercial vehicle electric skateboard chassis comprising: a frame, a domain control battery pack, an electric drive axle, an electric steering gear, a cooling module, a front suspension, a chiller, a PTC, an electric compressor, a super kettle, a battery, a spare tire, and a charging port;

[0007] The frame includes a front leaf spring front support, a front leaf spring rear support, a rear leaf spring front support, and a rear leaf spring rear support. The hole position and length between the front leaf spring front support and the front leaf spring rear support are fixed, and the hole position and length between the rear leaf spring front support and the rear leaf spring rear support are fixed.

[0008] The frame longitudinal beam adopts a straight-through design with equal cross-section and width; independent suspension fixing points and non-independent suspension fixing points are staggered in the X direction on the frame longitudinal beam;

[0009] The domain control battery pack uses an integrated PTC solution and is placed in the middle of the frame rail. The upper surface of the domain control battery pack is flush with the upper surface of the frame rail. The domain control battery pack integrates the battery pack bracket, all-in-one, VCU, MCU, and BMS. The domain control battery pack is installed on the lower surface of the frame rail with a battery pack mounting pad with bolts.

[0010] The electric drive axle adopts a parallel axis coaxial electric drive axle; the electric steering gear is set at the front of the frame longitudinal beam; the battery is set on the left side of the middle of the frame longitudinal beam; the spare tire and charging port are set at the tail of the frame longitudinal beam; the cooling module, Chiller, PTC, electric compressor, and super water bottle are arranged in the middle of the frame longitudinal beam through an integrated bracket.

[0011] Preferably, the cross section of the frame longitudinal beam adopts a C-beam or an I-beam, and the hole positions of the frame longitudinal beam in the area from the rear support of the front leaf spring to the front support of the rear leaf spring adopt standardized holes.

[0012] According to a second aspect of the present invention, a vehicle is provided, comprising the above-mentioned light commercial vehicle electric skateboard chassis and a body; the body floor is connected to the frame longitudinal beam through suspension.

[0013] Preferably, the vehicle body floor is provided with a through-type cross beam, and the through-type cross beam is connected to the frame longitudinal beam via an L-shaped bracket.

[0014] Preferably, it also includes a cargo box; the vehicle body floor is connected to the front end of the frame longitudinal beam; the cargo box is fixed to the longitudinal beam of the frame 1 and the rear side of the vehicle body through U-bolts and L-shaped brackets.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The light commercial vehicle electric skateboard chassis provided by the present invention is compatible with the development and design of light passenger and light truck models through its special structural design, significantly reducing the R&D cycle and R&D cost of new models. It can not only meet consumers' personalized customization but also achieve rapid iteration of vehicle models. At the same time, it can achieve the commonality of multiple components and reduce production costs. Through platform design, economies of scale can be formed. Multiple products are based on the same platform, which improves flexibility, effectively reduces development costs, and shortens the development cycle.

[0017] 2. The present invention also forms an interchangeable structural design of leaf spring non-independent suspension and double wishbone independent front suspension through a special fixed point design, which not only meets the driving comfort requirements of light commercial vehicles, but also meets the low cost and high load requirements of light trucks.

[0018] 3. Furthermore, the frame longitudinal beams of the present invention adopt a straight-through design with a uniform cross-section, and a structural design capable of adjusting the front overhang length, wheelbase, and rear overhang length. The wheelbase can be varied from 3 meters to 3.75 meters, and the vehicle length can be varied from 5.5 meters to 6 meters. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Other features, objects and advantages of the present invention will become more apparent upon reading the detailed description of non-limiting embodiments with reference to the following drawings:

[0020] Figure 1 Schematic diagram of the adjustment of the total length, wheelbase, front overhang and rear overhang of the vehicle frame described in Example 1;

[0021] Figure 2 Schematic diagram of the top view of the skateboard chassis described in Example 1;

[0022] Figure 3 Schematic diagram of the fixed position of the front suspension described in Example 1;

[0023] Figure 4 This is a schematic top view of the light passenger vehicle body described in Example 1;

[0024] Figure 5 for Figure 4 Cross-section from the middle AA perspective;

[0025] Figure 6 for Figure 4 Cross-section from the middle BB perspective;

[0026] Figure 7 This is a side structural schematic diagram of the skateboard chassis described in Example 1.

[0027] The figure shows:

[0028] 1- Frame;

[0029] 2-Domain control battery pack;

[0030] 3-Electric drive axle;

[0031] 4-Electric steering gear;

[0032] 5-Cooling module;

[0033] 6-Front suspension;

[0034] 7-Chiller;

[0035] 8-PTC;

[0036] 9-Electric compressor;

[0037] 10-Super Kettle;

[0038] 11-Battery;

[0039] 12-spare tire;

[0040] 13-Charging port;

[0041] 14-Body suspension;

[0042] 15-body floor;

[0043] 16-L-type bracket;

[0044] 17-Through-type beam. DETAILED DESCRIPTION

[0045] To make the objectives, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Generally, the components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0046] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for protection, but merely represents selected embodiments of the present application. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments in the present application without making any creative efforts shall fall within the scope of protection of the present application.

[0047] It should be noted that similar reference numerals and letters denote similar items in the following figures. Therefore, once an item is defined in one figure, it does not require further definition or explanation in subsequent figures. Furthermore, all directional designations (such as up, down, left, right, front, back, bottom, etc.) in this application are intended only to explain the relative positional relationships and movement of components in a specific posture (as shown in the figures). If the specific posture changes, the directional designations will also change accordingly.

[0048] Example 1

[0049] This embodiment provides an electric skateboard chassis for light commercial vehicles, designed to significantly reduce the R&D cycle and costs of new vehicle models. This not only meets consumer customization needs but also enables rapid vehicle iteration, providing countless possibilities for both consumers and automakers. Furthermore, the standardized skateboard chassis allows for the commonality of multiple components, keeping production costs relatively low. Based on the chassis provided in this embodiment, both light passenger and light truck models can be developed. The platform-based design facilitates economies of scale, with multiple products based on the same platform, increasing flexibility and effectively reducing development costs and cycles. Furthermore, it provides hardware support for extending the autonomous driving platform.

[0050] like Figure 1-Figure 7 As shown, this embodiment provides a light commercial vehicle electric skateboard chassis, including: a frame 1, a domain control battery pack 2, an electric drive axle 3, an electric steering gear 4, a cooling module 5, a front suspension 6, a Chiller 7, a PTC 8, an electric compressor 9, a super kettle 10, a battery 11, a spare tire 12, and a charging port 13.

[0051] Frame 1's longitudinal beams feature a straight-through design with uniform cross-section and width. They utilize either a C-beam or I-beam cross-section, with the cross-section height dimension determined based on the chassis's designed load capacity. Roller-forming can be used for stamping, saving mold investment and shortening development cycles. Standardized hole placement is used throughout the middle section of the beam (from the rear support of the front leaf spring to the front support of the rear leaf spring).

[0052] The overall length, wheelbase, front overhang, and rear overhang of the vehicle frame 1 can be adjusted to suit the needs of light passenger vehicles and light trucks. The frame 1 includes a front leaf spring front support, a front leaf spring rear support, a rear leaf spring front support, and a rear leaf spring rear support. The front and rear suspension modules of the vehicle are fixed. Specifically, the hole position and length between the front leaf spring front support and the front leaf spring rear support are fixed, and the hole position and length between the rear leaf spring front support and the rear leaf spring rear support are fixed.

[0053] like Figure 1As shown, the length from the front leaf spring's front support to the front end of the frame can be adjusted to different dimensions depending on the front overhang dimensions of light buses and light trucks. Light buses typically utilize a semi-long cab for aesthetics, wind resistance, and ease of entry and exit, resulting in a longer front overhang. Light trucks, under the regulatory requirement that blue-plate vehicles should not exceed 6 meters, typically utilize a flat-top cab to maximize cargo box length, resulting in a shorter front overhang. The length from the front leaf spring's rear support to the rear leaf spring's front support can be adjusted to meet the wheelbase requirements of light buses and light trucks, with dimensions ranging from 3 meters to 3.7 meters. The length from the rear leaf spring's rear support to the rear end of the frame can be adjusted to meet the rear overhang dimensions of light buses and light trucks. Generally, light trucks have a slightly longer rear overhang than light buses due to the need to accommodate spare tires and rear fenders.

[0054] like Figure 2 As shown, the Domain Control Battery Pack 2 utilizes an integrated PTC solution and is positioned between the longitudinal beams of the vehicle frame 1. Its upper surface is flush with the upper surface of the longitudinal beam, forming a flush, integrated unit with the vehicle frame 1. The Domain Control Battery Pack 2 integrates a battery pack bracket, an all-in-one unit, a VCU (vehicle control unit), an MCU (motor control unit), a BMS (battery management system), and other components as needed. Compared to traditional battery packs, this eliminates the need for a battery pack bracket and all-in-one mounting bracket, as well as the wiring harness connecting the battery and the all-in-one unit. This reduces the length of the three-phase cables and reduces vehicle weight and cost.

[0055] A battery pack mounting pad is installed on the lower wing surface of the longitudinal beam of the vehicle frame 1. The domain control battery pack 2 is bolted to the battery pack mounting pad. In this embodiment, five bolts are used on each side to connect the domain control battery pack 2 to the battery pack mounting pad. Installation and removal are simple and convenient, easy to operate, improving assembly efficiency and supporting future battery swapping. The power level of the domain control battery pack 2 can be selected according to the range requirements of light passenger and light truck models. A three-row or four-row solution is adopted, accommodating the expansion capacity of multiple power levels within a single envelope, and the layout space can accommodate power requirements of 50-120kWh.

[0056] The electric drive axle 3 adopts a parallel-axis coaxial electric drive axle, which makes the X-direction dimension of the electric drive axle 3 smaller than that of the offset electric drive axle, and can reserve space for the large-capacity battery pack. The load-bearing capacity can meet the requirements of the 5T rear axle, and the integration is higher. Compared with the offset electric drive axle, the weight is reduced by 20kg. The reduction of unsprung mass can improve the comfort of the whole vehicle, while reducing the cost (up to 1,000 yuan).

[0057] As for the specific structure of the front suspension 6, light trucks are subject to cost constraints and need to adopt leaf spring non-independent suspension and ensure a certain overload capacity. Light passenger cars, as passenger cars, need to ensure good ride comfort and usually adopt independent suspension. The chassis provided in this embodiment can realize the interchangeable structural design of leaf spring non-independent suspension and double wishbone independent front suspension. Independent suspension fixing points are provided on the longitudinal beam of the frame 1 for fixing the independent suspension (such as double wishbone independent front suspension). Non-independent suspension fixing points are also provided for fixing the non-independent suspension. The fixing points of the independent suspension on the frame and the fixing points of the non-independent suspension on the frame are staggered in the X direction and do not interfere with each other, such as Figure 3 As shown, the double wishbone independent front suspension is fixed to the frame 1 in area A, which is located on the front axle centerline and arranged symmetrically around the front axle centerline. The dependent front suspension is fixed to the frame 1 in areas B and C, which are arranged symmetrically around the front axle centerline. These two solutions can exist independently of each other, without interfering with each other, and are interchangeable.

[0058] like Figure 2 、 Figure 7 As shown, the cooling module 5, Chiller 7 (battery cooler), PTC 8 (positive temperature coefficient heater), electric compressor 9, and super kettle 10 are all located in the center of the longitudinal beam of the frame 1 and secured to the frame 1 via an integrated bracket. This integrated bracket reduces weight and costs through structural optimization and lightweight design. The electric steering gear 4 is located at the front of the longitudinal beam of the frame 1 to provide steering assistance. The battery 11 is located on the left side of the center of the longitudinal beam of the frame 1. The spare tire 12 and charging port 13 are located at the rear of the longitudinal beam of the frame 1.

[0059] like Figure 4 As shown, the skateboard chassis provided in this embodiment can be directly installed onto an existing light truck cab (light truck body). The specific configuration method is as follows: First, the longitudinal and cross beams of the existing light truck body floor 15 are removed and replaced with the longitudinal beams of the frame 1, so that the body floor 15 is directly connected to the longitudinal beams of the frame 1. A new through-type cross beam 17 is developed in the middle and rear sections of the body floor 15 and connected to the longitudinal beams of the frame 1 via an L-shaped bracket 16. The front section of the floor is provided with a suspension 14 connected to the longitudinal beams of the frame 1. The skateboard chassis provided in this embodiment can also be directly installed onto an existing light truck cab. The body floor of the light truck cab is fixed to the front end of the frame 1 via the cab suspension. The cargo box is fixed to the longitudinal beams of the frame 1 via U-bolts and L-shaped brackets and is located at the rear of the light truck cab.

[0060] This embodiment innovatively designs an electric skateboard chassis for light commercial vehicles. Through its special structural design, it is compatible with the development and design of light passenger vehicles and light truck models, greatly reducing the R&D cycle and R&D cost of new models. It can not only meet the personalized customization of consumers but also realize rapid iteration of models. At the same time, it realizes the commonality of multiple components and reduces production costs. Through platform design, it can form economies of scale. Multiple products are based on the same platform, which improves flexibility, effectively reduces development costs, and shortens the development cycle.

[0061] This embodiment meets the driving comfort requirements of light commercial vehicles and the low-cost and high-load requirements of light trucks through the interchangeable structural design of leaf spring non-independent suspension and double wishbone independent front suspension.

[0062] The frame longitudinal beams of this embodiment adopt a straight-through design with equal cross-section, realizing a structural design for adjusting the front overhang length, wheelbase, and rear overhang length. The wheelbase can be varied from 3 meters to 3.75 meters, and the vehicle length can be varied from 5.5 meters to 6 meters.

[0063] Example 2

[0064] This embodiment provides a vehicle, comprising a light commercial vehicle electric skateboard chassis as described in Example 1, and also comprising a body, wherein the body floor is connected to the frame longitudinal beam via a suspension, and the body floor is provided with a through-type cross beam, and the through-type cross beam is connected to the frame longitudinal beam via an L-shaped bracket.

[0065] The vehicle body can be a light passenger cab or a light truck cab. In the case of a light passenger cab, a through-type crossbeam is provided in the middle and rear sections of the vehicle floor, connected to the frame longitudinal rails via L-shaped brackets. A suspension is provided at the front section of the vehicle floor, connected to the frame longitudinal rails. In the case of a light truck cab, the vehicle provided in this embodiment also includes a cargo box, with the vehicle floor connected to the front ends of the frame longitudinal rails. The cargo box is secured to the frame longitudinal rails and the rear side of the vehicle body via U-bolts and L-shaped brackets.

[0066] It should be noted that the explanation of various implementation methods and beneficial effects of the chassis in the above embodiment 1 is also applicable to this embodiment. To avoid redundancy, it will not be expanded here in detail.

[0067] The above describes the specific embodiments of the present invention. Based on the above description, relevant personnel can make various changes and modifications without departing from the scope of the technical concept of this invention.

Claims

1. A light commercial vehicle electric skateboard chassis, characterized in that: include: Frame, domain control battery pack, electric drive axle, electric steering gear, cooling module, front suspension, chiller, PTC, electric compressor, super kettle, battery, spare tire, charging port; The frame includes a front leaf spring front support, a front leaf spring rear support, a rear leaf spring front support, and a rear leaf spring rear support. The hole position and length between the front leaf spring front support and the front leaf spring rear support are fixed, and the hole position and length between the rear leaf spring front support and the rear leaf spring rear support are fixed. The frame longitudinal beam adopts a straight-through design with equal cross-section and width; independent suspension fixing points and non-independent suspension fixing points are staggered in the X direction on the frame longitudinal beam; The domain control battery pack uses an integrated PTC solution and is placed in the middle of the frame rail. The upper surface of the domain control battery pack is flush with the upper surface of the frame rail. The domain control battery pack integrates the battery pack bracket, all-in-one, VCU, MCU, and BMS. The domain control battery pack is installed on the lower surface of the frame rail with a battery pack mounting pad with bolts. The electric drive axle adopts a parallel axis coaxial electric drive axle; the electric steering gear is set at the front of the frame longitudinal beam; the battery is set on the left side of the middle of the frame longitudinal beam; the spare tire and charging port are set at the tail of the frame longitudinal beam; the cooling module, Chiller, PTC, electric compressor, and super water bottle are arranged in the middle of the frame longitudinal beam through an integrated bracket.

2. The light commercial vehicle electric skateboard chassis according to claim 1, characterized in that: The cross section of the frame longitudinal beam adopts a C-beam or an I-beam, and the hole position of the frame longitudinal beam in the range from the rear support of the front leaf spring to the front support of the rear leaf spring adopts a standardized hole.

3. A vehicle, characterized in that: It comprises a light commercial vehicle electric skateboard chassis and body as described in claim 1 or 2; the body floor is connected to the frame longitudinal beam through suspension.

4. A vehicle according to claim 3, characterized in that: The vehicle body floor is provided with a through-type cross beam, and the through-type cross beam is connected to the frame longitudinal beam through an L-shaped bracket.

5. A vehicle according to claim 3, characterized in that: It also includes a cargo box; the vehicle body floor is connected to the front end of the frame longitudinal beam; the cargo box is fixed to the longitudinal beam of the frame 1 and the rear side of the vehicle body through U-bolts and L-shaped brackets.

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