Angle module system and modular extensible chassis

Abstract

The invention is suitable for the technical field of automobile chassis, and provides an angle module system and a modular extensible chassis, and the angle module system adopts an unequal-length double-wishbone suspension and has good geometric kinematics characteristics. And the offset distance of the main pin is reasonably controlled through the design of steering knuckle parts. By adopting the angle module bracket, the efficient integration of the driving unit and the frame structure is realized, the number of connecting points of the angle module system and the chassis is reduced, and the serialization, integration and modularization of the chassis system are facilitated. A distributed main pin steering gear is adopted, and the geometrical shape design of upper and lower control arms of the suspension is matched, so that wheels have a larger turning angle range, and the maneuverability is improved. In addition, the modular extensible chassis adopts modular design, and the number of shafts can be flexibly configured according to carrying requirements.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of automobile chassis, and particularly relates to an angle module system and a modular expandable chassis. BACKGROUND

[0002] With the development of automobile electrification and intelligence, the automobile chassis is undergoing evolution from the chassis of a fuel vehicle to the chassis of a pure electric vehicle. A distributed electric drive chassis with a hub motor as a power source has the characteristics of high controllable degrees of freedom and a short transmission chain, and can fully exploit the potential of vehicle dynamics control, improve driving efficiency, and simplify the chassis structure.

[0003] The chassis based on a modular distributed electric drive architecture breaks through the traditional vehicle system structure division method and has the typical characteristics of expandable physical form and definable functional form. The typical feature is that a composite functional module integrating driving, braking, steering and suspension systems is used as a minimum driving unit. Compared with the existing distributed drive chassis structure, the composite functional module cancels mechanical connections such as a steering tie rod and a transverse stabilizer, releases more motion degrees of freedom of the vehicle chassis, and has the technical advantages of high functional cohesion and low system coupling. The emergence of the fully decoupled new chassis configuration brings the possibility of widening the vehicle dynamics boundary and realizing multi-unit on-demand expansion based on a carrying task.

[0004] However, the high integration of chassis functions increases the complexity of the wheel edge structure of the driving unit, and the integrated design of the chassis function components becomes the key to configuration research. SUMMARY

[0005] The purpose of the embodiments of the present application is to provide an angle module system and a modular expandable chassis, aiming to solve the problems raised in the background.

[0006] The embodiments of the present application are implemented as follows: an angle module system, comprising: a hub motor, a braking system, a steering knuckle assembly, a kingpin steering gear, an upper outer control arm, an upper inner control arm assembly, a lower control arm assembly, a suspension actuator and an angle module support; The braking system is installed on one side of the hub motor to form a modular structure; the steering knuckle assembly is connected with the hub motor; one end of the lower control arm assembly is hingedly connected with the lower end of the steering knuckle assembly, and the other end is hingedly connected with the lower end of the angle module support; one side of the upper outer control arm is connected with the output end of the kingpin steering gear, and the other side is connected with the upper end of the steering knuckle assembly, so that the kingpin steering gear drives the wheel to steer by exerting torque on the steering knuckle assembly; one end of the upper inner control arm assembly is hingedly connected with the upper outer control arm, and the other end is hingedly connected with the upper end of the angle module support; one end of the suspension actuator is hingedly connected with the lower control arm assembly, and the other end is installed at the top end of the angle module support; the angle module support integrates the above structures and is connected with at least one of a vehicle body and a vehicle frame.

[0007] Further technical solutions, the suspension structure of the angle module system adopts unequal length double wishbone configuration, the upper inner control arm assembly, the upper outer control arm, the steering knuckle assembly and the lower control arm assembly and the frame jointly constitute a closed loop of the suspension mechanism; The upper inner control arm assembly comprises an upper inner control arm body and a first bushing; the first bushing is arranged in a first mounting hole of the upper inner control arm body and is hinged to the angle module support, that is, the upper inner control arm assembly can rotate relative to the angle module support; in addition, the upper inner control arm body is hinged to the upper outer control arm through a first lug; The kingpin steering gear comprises a steering transmission mechanism and a steering drive motor; the housing of the steering transmission mechanism is connected to the upper outer control arm, the output end of the steering drive motor is connected to the steering transmission mechanism, and the output end of the steering transmission mechanism is connected to the steering knuckle assembly; The lower control arm assembly comprises a lower control arm body and a second bushing; the lower control arm body is symmetrically provided with two second mounting holes at one end, the second bushing is arranged in the second mounting hole and is hinged to the angle module support; the other end of the lower control arm body is hinged to the lower end of the steering knuckle assembly through a ball joint; the middle part of the lower control arm body is hinged to the third mounting hole at the bottom of the suspension actuator through a second lug; The suspension actuator comprises an elastic element, a damper and a third mounting seat; the suspension actuator is hinged to the lower control arm body through the third mounting hole at the bottom end of the third mounting seat, and the top end of the suspension actuator is connected to the angle module support through the third mounting seat.

[0008] Further technical solutions, the damper is a continuously variable damper, a magnetorheological damper, an electromagnetic damper or a passive hydraulic damper; the elastic element is a single-cavity air spring, a double-cavity air spring, an oil-gas spring or a coil spring.

[0009] Further technical solutions, the wheel hub motor is provided with a first mounting seat and a wheel hub bearing spline; the first mounting seat is used for connecting the steering knuckle assembly and is provided with a first threaded hole used for cooperating with a fastener; the wheel hub bearing spline is a mechanical interface reserved for half shaft transmission mode; The brake system comprises a brake disc and a brake caliper body; the brake caliper body is provided with a first through hole used for connecting the steering knuckle assembly through a fastener.

[0010] Further technical solutions, the steering knuckle assembly comprises a steering knuckle adapter and a steering knuckle body; One end of the steering knuckle adapter is connected to the first mounting bracket on the hub motor, and the other end is connected to the steering knuckle body. It is also connected to the brake caliper body through a third through hole. In addition, the steering knuckle adapter is provided with a first stepped hole, a second threaded hole, and a second through hole. The steering knuckle body adopts a high-arc design; the top of the steering knuckle body is provided with a first flange structure, the bottom of the steering knuckle body is provided with a second mounting seat, and the steering knuckle body is also provided with a second stepped hole; wherein, the first flange structure is used to install the output end of the steering transmission mechanism; the second stepped hole is connected to the second threaded hole of the steering knuckle adapter through a fastener; the second mounting seat is connected to the ball joint on the lower control arm body.

[0011] In a further technical solution, the corner module bracket includes a fourth mounting base, an upper connecting structure, a middle connecting structure, and a lower connecting structure; The upper connecting structure is mainly used for hinged connection of the upper inner control arm assembly, including a first support structure, a third lug, and a fourth lug. The first support structure is a thickened boss, with the third and fourth lugs arranged on its upper surface. The lower connecting structure includes a second support structure, a fifth lug, and a sixth lug, with the fifth and sixth lugs disposed on the lower surface of the second support structure. The middle connecting structure is located between the upper and lower connecting structures, connecting the first and second support structures through a web and a second rib. The second rib is a mesh-like reinforcing rib. The web also has a fourth through hole for connection to the vehicle body or frame via fasteners. The corner module bracket is also connected to the suspension actuator via a fourth mounting base; the fourth mounting base includes a second flange structure, side skirts, and a first rib; the second flange structure is connected to a third mounting base of the suspension actuator; the side skirts are disposed on both sides of the second flange structure to enhance the stiffness of the cantilever beam formed by the flange structure; a first rib is disposed on one side of the lower web of the second flange structure to improve the resistance to bending moment loads.

[0012] Another objective of this invention is to provide a modular and scalable chassis based on the aforementioned corner module system. This chassis adopts a two-axle design, including two drive axle modules and a power battery module located between them. The modules are connected through standardized electrical and mechanical interfaces, enabling it to be expanded into a multi-axle chassis.

[0013] In a further technical solution, the drive axle module includes a drive axle frame, two corner module systems, and two wheels; the corner module systems are mounted on the drive axle frame via corner module brackets, and the two corner module systems are symmetrically arranged. The wheel consists of a rim and a tire, wherein the tire is fitted around the outer periphery of the rim, and the rim is connected to one side of the hub motor. The power battery module is composed of a power battery and a power battery frame, and the two ends of the power battery frame are connected with the drive axle frames in the two drive axle modules respectively.

[0014] The corner module system and the modular expandable chassis provided by the embodiment of the application have the following beneficial effects: (1) The corner module system adopts unequal-length double wishbone suspension and has good geometric kinematics characteristics. The kingpin offset is reasonably controlled through the design of the knuckle part.

[0015] (2) The geometric shape of the upper and lower control arms of the suspension is designed, so that the steering system has a turning angle range of +90° to -37°. The vehicle has good maneuverability and can realize various steering modes including Ackerman steering, central steering, pivot steering, transverse driving and diagonal driving.

[0016] (3) The split knuckle is adopted, the mechanical interfaces of the brake caliper-hub motor and the suspension linkage-kingpin steering gear are arranged on the knuckle adapter and the knuckle body respectively, and the processability and structural strength are considered. A standardized mechanical interface is arranged between the knuckle body and the knuckle adapter. When different hub motors / brakes need to be adapted, only the knuckle adapter needs to be replaced; when different configurations of the suspension / steering mechanism need to be adapted, only the knuckle body needs to be replaced. The above design improves the universality of the corner module series parts of different vehicle models and the flexibility of assembly.

[0017] (4) The corner module support is adopted to realize efficient integration of the driving unit and the frame / body structure. The integration of the frame / body and the corner module support can reduce the number of connection points of the corner module and the chassis, and the mechanical interface can be designed in a standardized manner. Thus, the series, integration and modularization of the chassis system are facilitated, and the adaptability of the chassis system to new vehicle models is better. At the same time, the corner module is convenient to disassemble and maintain.

[0018] (5) The chassis adopts modular design, and different numbers of shafts can be configured according to the carrying demand. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 The structure diagram of the corner module system provided by the embodiment of the application is shown in the figure; Figure 2 The structure diagram of the suspension and steering integrated mechanism of the corner module system provided by the embodiment of the application is shown in the figure; Figure 3 The structure diagram of the drive and brake integrated mechanism of the corner module system provided by the embodiment of the application is shown in the figure; Figure 4 The structure diagram of the knuckle adapter in the corner module system provided by the embodiment of the application is shown in the figure; Figure 5A structure schematic view of a knuckle body in an angle module system provided by the embodiment of the present application; Figure 6 A split structure schematic view of a knuckle assembly in an angle module system provided by the embodiment of the present application; Figure 7 An assembly structure schematic view of a knuckle assembly and a driving brake integrated mechanism in an angle module system provided by the embodiment of the present application; Figure 8 A structure schematic view of an angle module support in an angle module system provided by the embodiment of the present application; Figure 9 A back structure schematic view of an angle module support in an angle module system provided by the embodiment of the present application; Figure 10 A structure schematic view of a driving axle module in a modular and scalable chassis provided by the embodiment of the present application; Figure 11 A structure schematic view of a power battery module in a modular and scalable chassis provided by the embodiment of the present application; Figure 12 A structure schematic view of a modular and scalable chassis provided by the embodiment of the present application.

[0020] In the attached diagram: 1-Drive axle frame; 2-Corner module system; 21-Wheel hub motor; 211-First mounting base; 2111-First threaded hole; 212-Wheel hub bearing spline; 22-Brake system; 221-Brake disc; 222-Brake caliper; 2221-First through hole; 23-Steering knuckle assembly; 231-Steering knuckle adapter; 2311-First stepped hole; 2312-Second threaded hole; 2313-Second through hole; 2314 - Third through hole; 232- Steering knuckle body; 2321- First flange structure; 2322- Second stepped hole; 2323- Second mounting base; 24- Kingpin steering gear; 241- Steering transmission mechanism; 242- Steering drive motor; 25- Upper outer control arm; 26- Upper inner control arm assembly; 261- Upper inner control arm body; 2611- First mounting hole; 2612- First lug; 262- First bushing; 27- Lower control arm assembly 271-Lower control arm body; 2711-Second mounting hole; 2712-Second lug; 2713-Ball joint; 272-Second bushing; 28-Suspension actuator; 281-Elastic element; 282-Damper; 283-Third mounting base; 284-Third mounting hole; 29-Angle module bracket; 291-Fourth mounting base; 2911-Second flange structure; 2912-Side skirt; 2913-First rib; 292- Upper connecting structure; 2921-First support structure; 2922-Third lug; 2923-Fourth lug; 293-Middle connecting structure; 2931-Body plate; 2932-Second rib plate; 2933-Fourth through hole; 294-Lower connecting structure; 2941-Second support structure; 2942-Fifth lug; 2943-Sixth lug; 3-Wheel; 31-Tire; 32-Rim; 4-Power battery; 5-Power battery frame. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0022] The specific implementation of the present invention will be described in detail below with reference to specific embodiments.

[0023] like Figure 1 As shown, an embodiment of the present invention provides an angle module system 2, which includes: a hub motor 21, a braking system 22, a steering knuckle assembly 23, a kingpin steering gear 24, an upper outer control arm 25, an upper inner control arm assembly 26, a lower control arm assembly 27, a suspension actuator 28, and an angle module bracket 29. The brake system 22 is installed on one side of the wheel hub motor 21, forming a highly modular structure; the knuckle assembly 23 is connected with the wheel hub motor 21; one end of the lower control arm assembly 27 is hinged with the lower end of the knuckle assembly 23, and the other end is hinged with the lower end of the angle module support 29; one side of the upper outer control arm 25 is connected with the output end of the kingpin steering gear 24, and the other side is connected with the upper end of the knuckle assembly 23, so that the kingpin steering gear 24 can drive the wheel 3 to steer by exerting torque on the knuckle assembly 23; one end of the upper inner control arm assembly 26 is hinged with the upper outer control arm 25, and the other end is hinged with the upper end of the angle module support 29; one end of the suspension actuator 28 is hinged with the lower control arm assembly 27, and the other end is installed on the top end of the angle module support 29; the angle module support 29 efficiently integrates the above structure and is connected with at least one of the vehicle body and the vehicle frame.

[0024] As shown in Figure 2 As a preferred embodiment of the present application, the suspension structure of the angle module system 2 adopts a double wishbone configuration with unequal lengths, and the upper inner control arm assembly 26, the upper outer control arm 25, the knuckle assembly 23, the lower control arm assembly 27, and the vehicle frame together form a closed loop of the suspension mechanism.

[0025] The upper inner control arm assembly 26 includes an upper inner control arm body 261 and a first bushing 262; the first bushing 262 is arranged in a first mounting hole 2611 of the upper inner control arm body 261 and is hinged with the angle module support 29, that is, the upper inner control arm assembly 26 can rotate relative to the angle module support 29; in addition, the upper inner control arm body 261 is hinged with the upper outer control arm 25 through a first lug 2612.

[0026] The kingpin steering gear 24 includes a steering transmission mechanism 241 and a steering drive motor 242; the housing of the steering transmission mechanism 241 is connected with the upper outer control arm 25, the output end of the steering drive motor 242 is connected with the steering transmission mechanism 241, and the output end of the steering transmission mechanism 241 is connected with the knuckle assembly 23.

[0027] The lower control arm assembly 27 includes a lower control arm body 271 and a second bushing 272; one end of the lower control arm body 271 is symmetrically provided with two second mounting holes 2711, the second bushing 272 is arranged in the second mounting hole 2711 and is hinged with the angle module support 29; the other end of the lower control arm body 271 is hinged with the lower end of the knuckle assembly 23 through a ball joint 2713; the middle part of the lower control arm body 271 is hinged with a third mounting hole 284 at the bottom of the suspension actuator 28 through a second lug 2712.

[0028] The suspension actuator 28 comprises an elastic element 281, a damper 282 and a third mounting seat 283; the suspension actuator 28 is hinged to the lower control arm body 271 through a third mounting hole 284 at the bottom end of the third mounting seat 283, and the top end of the suspension actuator 28 is connected to the angle module support 29 through the third mounting seat 283.

[0029] In the embodiment of the present application, the damper 282 adopts the damping device in the prior art system. Specifically, the damper 282 can be a continuously variable damper, a magneto-rheological damper, an electromagnetic damper and a passive hydraulic damper, etc. The elastic element 281 can be in the form of a single-cavity air spring, a double-cavity air spring, an oil-gas spring or a coil spring, etc. The present application does not make specific limitation on the structural form of the elastic element 281 and the damper 282.

[0030] As shown in Figure 3 , as a preferred embodiment of the present application, the hub motor 21 is provided with a first mounting seat 211 and a hub bearing spline 212; wherein the first mounting seat 211 is used for connecting with the knuckle assembly 23, and is provided with a first threaded hole 2111 for cooperating with a fastener; the hub bearing spline 212 is a mechanical interface reserved for the optional half shaft transmission mode. The brake system 22 comprises a brake disc 221 and a brake caliper body 222; wherein the brake caliper body 222 is provided with a first through hole 2221 for connecting with the knuckle assembly 23 through a fastener.

[0031] As shown in Figure 1 , Figure 2 , Figure 4 , Figure 5 , Figure 6 and Figure 7 , as a preferred embodiment of the present application, the knuckle assembly 23 comprises a knuckle adapter 231 and a knuckle body 232, which can greatly simplify the part structure of the knuckle and facilitate processing. The knuckle adapter 231 provides a mechanical interface for the brake caliper body 222, the knuckle body 232 and the hub motor 21; one end thereof is connected to the first mounting seat 211 on the hub motor 21, and the other end thereof is connected to the knuckle body 232, and further connected to the brake caliper body 222 through a third through hole 2314; in addition, the knuckle adapter 231 is further provided with a first stepped hole 2311, a second threaded hole 2312 and a second through hole 2313. The knuckle body adopts a high-throw type configuration, and the lateral offset distance of the kingpin is reduced through structural optimization design; the top of the knuckle body 232 is provided with a first flange structure 2321, the bottom of the knuckle body 232 is provided with a second mounting seat 2323, and a second stepped hole 2322 is further formed in the knuckle body 232; wherein the first flange structure 2321 is used for mounting the output end of the steering transmission mechanism 241; the second stepped hole 2322 is connected with the second threaded hole 2312 of the knuckle adapter 231 through a fastener; and the second mounting seat 2323 is connected with the spherical pair 2713 on the lower control arm body 271.

[0032] As shown in Figure 8 and Figure 9 As a preferred embodiment of the present application, the corner module bracket 29 includes a fourth mounting seat 291, an upper connecting structure 292, a middle connecting structure 293 and a lower connecting structure 294. The upper connecting structure 292 is mainly used for hingedly connecting the upper inner control arm assembly 26, and includes a first support structure 2921, a third ear 2922 and a fourth ear 2923; the first support structure 2921 is a thickened boss, and the third ear 2922 and the fourth ear 2923 are arranged on the upper surface of the boss; similarly, the lower connecting structure 294 includes a second support structure 2941, a fifth ear 2942 and a sixth ear 2943, and the fifth ear 2942 and the sixth ear 2943 are arranged on the lower surface of the second support structure 2941; the middle connecting structure 293 is located between the upper connecting structure 292 and the lower connecting structure 294, and connects the first support structure 2921 and the second support structure 2941 through a web plate 2931 and a second rib plate 2932; the second rib plate 2932 is a grid-shaped reinforcing rib, which can improve the overall rigidity of the corner module bracket 29 and is also conducive to reducing the weight of the part; and a fourth through hole 2933 is further arranged on the web plate 2931 and used for connecting the vehicle body or the vehicle frame through a fastener.

[0033] The corner module bracket 29 is further connected with the suspension actuator 28 through the fourth mounting seat 291; the fourth mounting seat 291 includes a second flange structure 2911, a side skirt plate 2912 and a first rib plate 2913; specifically, the second flange structure 2911 is connected with the third mounting seat 283 of the suspension actuator 28; the side skirt plate 2912 is arranged on the two sides of the second flange structure 2911 and used for strengthening the rigidity of the cantilever beam formed by the flange structure; and the first rib plate 2913 is arranged on one side of the web plate below the second flange structure 2911 and used for improving the resistance to bending moment load.

[0034] As shown in Figures 10-12As shown, a modular scalable chassis provided by an embodiment of the present application is based on the above-mentioned corner module system 2, adopts a two-axle design, includes two drive axle modules, and a power battery module located between the two drive axle modules. The modules are connected through standardized electrical and mechanical interfaces, and can be expanded into a multi-axle chassis, so as to flexibly configure the number of vehicle axles according to the carrying task requirements. In addition, the drive axle module and the power battery module have a relatively low overall height and a relatively flat upper space, and can be adapted to various superstructures to meet the application requirements of different scenes. The drive axle module includes a drive axle frame 1, two corner module systems 2, and two wheels 3. The corner module system 2 is installed on the drive axle frame 1 through a corner module support 29, and the two corner module systems 2 are symmetrically arranged. The wheel 3 is composed of a rim 32 and a tire 31, wherein the tire 31 is sleeved on the outer periphery of the rim, and the rim 32 is connected to one side of the hub motor 21. The power battery module is composed of a power battery 4 and a power battery frame 5, and the two ends of the power battery frame 5 are respectively connected to the drive axle frames 1 in the two drive axle modules.

[0035] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A corner module system, characterized in that, Includes hub motor, braking system, steering knuckle assembly, kingpin steering gear, upper outer control arm, upper inner control arm assembly, lower control arm assembly, suspension actuator and corner module bracket; The braking system is mounted on one side of the hub motor, forming a modular structure; the steering knuckle assembly is connected to the hub motor; one end of the lower control arm assembly is hinged to the lower end of the steering knuckle assembly, and the other end is hinged to the lower end of the corner module bracket; one side of the upper outer control arm is connected to the output end of the kingpin steering gear, and the other side is connected to the upper end of the steering knuckle assembly, so that the kingpin steering gear drives the wheel to steer by applying torque to the steering knuckle assembly; one end of the upper inner control arm assembly is hinged to the upper outer control arm, and the other end is hinged to the upper end of the corner module bracket; one end of the suspension actuator is hinged to the lower control arm assembly, and the other end is mounted on the top of the corner module bracket; the corner module bracket integrates the above structures and is connected to at least one of the vehicle body and the frame.

2. The corner module system according to claim 1, characterized in that, The suspension structure of the corner module system adopts an unequal length double wishbone configuration. The upper inner control arm assembly, upper outer control arm, steering knuckle assembly, and lower control arm assembly together with the vehicle frame form a closed loop of the suspension mechanism. The upper inner control arm assembly includes an upper inner control arm body and a first bushing; the first bushing is arranged in a first mounting hole of the upper inner control arm body and is hinged to the corner module bracket, that is, the upper inner control arm assembly can rotate relative to the corner module bracket; in addition, the upper inner control arm body is also hinged to the upper outer control arm through a first lug. The kingpin steering system includes a steering transmission mechanism and a steering drive motor; wherein, the housing of the steering transmission mechanism is connected to the upper outer control arm, the output end of the steering drive motor is connected to the steering transmission mechanism, and the output end of the steering transmission mechanism is connected to the steering knuckle assembly; The lower control arm assembly includes a lower control arm body and a second bushing; one end of the lower control arm body is symmetrically provided with two second mounting holes, and a second bushing is arranged in the second mounting hole and hinged to the corner module bracket; the other end of the lower control arm body is hinged to the lower end of the steering knuckle assembly through a ball joint; the middle part of the lower control arm body is hinged to the third mounting hole at the bottom of the suspension actuator through a second lug. The suspension actuator includes an elastic element, a damper, and a third mounting base; the suspension actuator is hinged to the lower control arm body through a third mounting hole at the bottom of the third mounting base, and the top of the suspension actuator is connected to the corner module bracket through the third mounting base.

3. The corner module system according to claim 2, characterized in that, The damper is a continuously variable damper, a magnetorheological damper, an electromagnetic damper, or a passive hydraulic damper; the elastic element is a single-cavity air spring, a double-cavity air spring, a hydropneumatic spring, or a helical spring.

4. The corner module system according to claim 2, characterized in that, The hub motor is provided with a first mounting seat and a hub bearing spline; wherein, the first mounting seat is used to connect with the steering knuckle assembly, and is provided with a first threaded hole for mating with fasteners; the hub bearing spline is a mechanical interface reserved for a half-shaft transmission mode; The braking system includes a brake disc and a brake caliper; wherein, the brake caliper is provided with a first through hole for connection to the steering knuckle assembly via fasteners.

5. The corner module system according to claim 4, characterized in that, The steering knuckle assembly includes a steering knuckle adapter and a steering knuckle body; One end of the steering knuckle adapter is connected to the first mounting bracket on the hub motor, and the other end is connected to the steering knuckle body. It is also connected to the brake caliper body through a third through hole. In addition, the steering knuckle adapter is provided with a first stepped hole, a second threaded hole, and a second through hole. The steering knuckle body adopts a high-arc design; the top of the steering knuckle body is provided with a first flange structure, the bottom of the steering knuckle body is provided with a second mounting seat, and the steering knuckle body is also provided with a second stepped hole; wherein, the first flange structure is used to install the output end of the steering transmission mechanism; the second stepped hole is connected to the second threaded hole of the steering knuckle adapter through a fastener; the second mounting seat is connected to the ball joint on the lower control arm body.

6. The corner module system according to claim 5, characterized in that, The corner module bracket includes a fourth mounting base, an upper connecting structure, a middle connecting structure, and a lower connecting structure; The upper connecting structure, used for hinged connection of the upper inner control arm assembly, includes a first support structure, a third lug, and a fourth lug. The first support structure is a thickened boss with the third and fourth lugs arranged on its upper surface. The lower connecting structure includes a second support structure, a fifth lug, and a sixth lug, with the fifth and sixth lugs disposed on the lower surface of the second support structure. The middle connecting structure is located between the upper and lower connecting structures and connects the first and second support structures via a web and a second rib. The second rib is a mesh-like reinforcing rib. The web also has a fourth through hole for connection to the vehicle body or frame via fasteners. The corner module bracket is also connected to the suspension actuator via a fourth mounting base; the fourth mounting base includes a second flange structure, side skirts, and a first rib; the second flange structure is connected to a third mounting base of the suspension actuator; the side skirts are disposed on both sides of the second flange structure to enhance the stiffness of the cantilever beam formed by the flange structure; a first rib is disposed on one side of the lower web of the second flange structure to improve the resistance to bending moment loads.

7. A modular and scalable chassis, comprising a corner module system according to any one of claims 1-6, characterized in that, The chassis features a two-axle design, including two drive axle modules and a power battery module located between them; the modules are connected through standardized electrical and mechanical interfaces, and it has the ability to be expanded into a multi-axle chassis.

8. The modular and scalable chassis according to claim 7, characterized in that, The drive axle module includes a drive axle frame, two corner module systems, and two wheels; the corner module systems are mounted on the drive axle frame via corner module brackets, and the two corner module systems are symmetrically arranged. The wheel consists of a rim and a tire, wherein the tire is fitted around the outer periphery of the rim, and the rim is connected to one side of the hub motor. The power battery module consists of a power battery and a power battery frame, with both ends of the power battery frame connected to the drive axle frames of the two drive axle modules, respectively.

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