A universalized pure electric vehicle platform lower body, subframe and suspension

Abstract

The application relates to the electric vehicle technical field and discloses a general pure electric vehicle platform lower vehicle body, a subframe and a suspension, the lower vehicle body comprising an engine compartment assembly, a front floor sill assembly and a rear floor assembly; the left front longitudinal beam assembly and the right front longitudinal beam assembly as general parts in the engine compartment assembly are universal in the corresponding mounting hole point position coordinates of the front subframe; the left sill assembly and the right sill assembly as general parts in the front floor sill assembly are universal in the corresponding mounting hole point position coordinates of the battery power module; the left rear longitudinal beam assembly and the right rear longitudinal beam assembly as general parts in the rear floor assembly are universal in the corresponding mounting hole point position coordinates of the rear subframe with a suspension assembly; the front suspension is universal in the corresponding mounting hole point position coordinates of the front subframe; the rear suspension is universal in the corresponding mounting hole point position coordinates of the rear subframe with the suspension assembly, so that the mutual assembly modes of the lower vehicle body, the subframe and the suspension are kept consistent.

Description

Technical Field

[0001] This invention relates to the field of electric vehicle technology, and in particular to a universal pure electric vehicle platform lower body, subframe, and suspension. Background Technology

[0002] The sales share of new energy vehicles continues to increase. The addition of new technologies such as intelligent chassis, 400V-1000V high-voltage architecture power systems, intelligent cockpits, and autonomous driving is making cars increasingly intelligent. In order to adapt to intelligent vehicles and related intelligent products, traditional car companies and emerging brands are developing new platforms to meet the needs of more intelligent vehicles. For example, NIO's NT2 platform has advantages in in-vehicle intelligent hardware, vehicle computing platform, operating system, intelligent algorithms and intelligent applications. At the same time, it can adapt to the common needs of various models such as ET7, ES7 and ET5, which will greatly improve product competitiveness.

[0003] Another example is Geely's SEA architecture, a pure electric original architecture centered on user travel experience. It constructs a three-dimensional layout integrating hardware, system, and ecosystem layers, covering A-class to E-class vehicles and meeting the needs of sedans, SUVs, MPVs, small city cars, sports cars, pickup trucks, and future mobility vehicles. However, the lower body, subframe, and suspension of the vehicle are difficult to align with the co-production of all electric vehicles on the same platform. For example, vehicle tuning components require redesign and tuning for almost every model if the weight changes, and different mounting points and methods prevent co-production of electric vehicles. Differentiated components and mounting methods increase the number and variety of platform components, as well as the development and management costs associated with differentiation. Summary of the Invention

[0004] In view of the shortcomings of existing technologies, the purpose of this invention is to provide a universal pure electric vehicle platform lower body, subframe, and suspension, thereby ensuring that the mounting points and mounting methods remain unchanged to the greatest extent, realizing co-line assembly and production, and solving the problem that the increase in the number and types of platform parts and the increase in differentiated development costs due to differentiated parts and mounting methods.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solution:

[0006] A universal pure electric vehicle platform includes a lower body, subframe, and suspension. The lower body comprises an engine compartment assembly, a front floor sill assembly, and a rear floor assembly. The left and right front longitudinal beam assemblies in the engine compartment assembly, being common components, share the same mounting hole coordinates as the corresponding front subframe. Similarly, the left and right sill assemblies in the front floor sill assembly, being common components, share the same mounting hole coordinates as the corresponding battery power module. The left and right rear longitudinal beam assemblies in the rear floor assembly, being common components, share the same mounting hole coordinates as the corresponding rear subframe with its suspension assembly. The front suspension shares the same mounting hole coordinates as the front subframe. The rear suspension shares the same mounting hole coordinates as the rear subframe with its suspension assembly, ensuring consistent assembly methods between the lower body, subframe, and suspension.

[0007] As a further implementation, the mounting point coordinates on the left front longitudinal beam assembly and the right front longitudinal beam assembly are interchangeable, and are used to fix them to the left and right sides of the front subframe, respectively.

[0008] As a further implementation, the left front longitudinal beam assembly and the right front longitudinal beam assembly are respectively connected to a universal left front shock absorber mount and a universal right front shock absorber mount on their rear sides. The shock absorber mount and the front air spring strut assembly of the front suspension are respectively provided with universal mounting point coordinates for mutual installation.

[0009] As a further implementation, the shock absorber mount and the front control arm assembly of the front suspension are respectively provided with universal mounting point coordinates for mutual installation.

[0010] As a further implementation, the front floor sill assembly also includes a front floor body, with the left sill assembly and right sill assembly respectively corresponding to the left and right sides of the fixed battery power module. The front floor body and the battery power module's built-in longitudinal beams and upper and lower housings are provided with corresponding universal installation point coordinates.

[0011] As a further implementation, the left and right rear longitudinal beam assemblies are each provided with three fixing holes. The middle hole is used to fix the left and right rear air spring assemblies of the rear suspension, and the corresponding mounting point coordinates are universal. The other fixing holes fix the rear subframe belt suspension assembly from the left and right sides, respectively, and the corresponding mounting point coordinates are universal.

[0012] As a further implementation, the front subframe is formed by welding an H-shaped welded body and a trapezoidal welded body together to form a welded structure body. The body is then connected to the corresponding mounting holes of the left and right front longitudinal beam assemblies through the triangular areas on both sides of the H-shaped welded body and the trapezoidal welded body.

[0013] As a further implementation, two inverted U-shaped stamped parts are welded to each side of the H-shaped welded body for fixed connection with the front lower control arm assembly of the front suspension, and the installation point coordinates are universal.

[0014] As a further implementation, the rear subframe with suspension assembly is die-cast from an H-shaped cast aluminum part. The four corners of the die-cast part have circular soft pads, which are connected to the corresponding mounting holes of the left and right rear longitudinal beam assemblies of the vehicle body by bolts.

[0015] As a further implementation, the rear subframe with suspension assembly has universal mounting points corresponding to the suspension pad assembly. There are oblique U-shaped reinforcing ribs between the body mounting bushing of the H-shaped cast aluminum rear crossbeam and the suspension pad assembly, which are used to fix the corresponding mounting points of the rear suspension, and the coordinates of the mounting points are universal.

[0016] The beneficial effects of the present invention are as follows:

[0017] 1. This invention, by adopting the same right front longitudinal beam assembly and left front longitudinal beam assembly with identical mounting hole coordinates and sizes, enables the front subframe assembly to be universal and maintains a consistent assembly method. Similarly, by adopting the same left and right rear longitudinal beam assemblies with identical mounting hole coordinates and sizes, the rear subframe with suspension assembly can be universal and maintain a consistent assembly method. By sharing the associated fixing points of the engine compartment and the front subframe, the connecting rod system and structure of the front suspension can be universalized. By sharing the associated fixing points of the rear floor assembly and the rear subframe with suspension assembly, the connecting rod system and structure of the rear suspension can be universalized. This maximizes the consistency of mounting points and mounting methods, enabling co-line assembly and production, and solving the problem of increased platform component quantity and variety due to differentiated parts and mounting methods, thus increasing the development cost of differentiation.

[0018] 2. This invention enables the power battery pack assembly to be universal and maintain consistent assembly methods by using a universal left and right sill assembly and having the same mounting hole coordinates and size. Furthermore, the universal electric drive three-in-one assembly, along with the adjustable stiffness of the (front suspension soft pad assembly, right suspension soft pad assembly, and left suspension soft pad assembly) soft pads, and having the same fixing method, hole positions, and structure, allows for universal assembly with the front subframe assembly. Similarly, the universal rear-drive electric drive three-in-one assembly, along with the adjustable stiffness of the (front suspension bracket-rear drive, right suspension soft pad assembly-rear drive, and left suspension soft pad assembly-rear drive) soft pads, and having the same fixing method, hole positions, and structure, allows for universal assembly with the rear subframe welding assembly.

[0019] 3. The present invention features a universal design and assembly of fixed points between corresponding structures, and adjusts the suspension stiffness by adjusting the air pressure only through calibration parameters, thereby meeting the suspension stiffness requirements of different vehicle types. Attached Figure Description

[0020] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0021] Figure 1(a) is a top view of the lower body, subframe, and suspension of the present invention;

[0022] Figure 1(b) is a front view of the lower body, subframe, and suspension of the present invention;

[0023] Figure 1(c) is a bottom view of the lower body, subframe, and suspension of the present invention;

[0024] Figure 2 This is the engine compartment assembly of the present invention;

[0025] Figure 3(a) is a schematic diagram of the mounting point of the right front longitudinal beam assembly with the front subframe assembly (right side) of the present invention;

[0026] Figure 3(b) is a schematic diagram of the mounting point of the left front longitudinal beam assembly with the front subframe assembly (left side) of the present invention;

[0027] Figure 3(c) is a schematic diagram of the fixing point of the left front shock absorber mount with the left front air spring slide assembly of the present invention;

[0028] Figure 3(d) is a schematic diagram of the fixing point of the left front shock absorber mount with control arm assembly of the present invention;

[0029] Figure 4(a) is a schematic diagram of the fixing point of the right front shock absorber mount with the right front air spring slide assembly of the present invention;

[0030] Figure 4(b) is a schematic diagram of the fixing point of the right front shock absorber mount with control arm assembly of the present invention;

[0031] Figure 5(a) is a schematic diagram of the left sill assembly of the present invention with the left fixing point of the battery power module;

[0032] Figure 5(b) is a schematic diagram of the right sill assembly of the present invention with the right fixing point of the battery power module;

[0033] Figure 5(c) is a schematic diagram of the fixing point of the longitudinal beam of the battery power module on the front floor body of the present invention;

[0034] Figure 6(a) is a schematic diagram of the left rear longitudinal beam assembly with wheel cover structure of the present invention;

[0035] Figure 6(b) is a schematic diagram of the right rear longitudinal beam assembly with wheel cover structure of the present invention;

[0036] Figure 7(a) is a schematic diagram of the left rear longitudinal beam assembly of the present invention;

[0037] Figure 7(b) is a schematic diagram of the right rear longitudinal beam assembly of the present invention;

[0038] Figure 8(a) is a top view of the overall structure of the front subframe assembly of the present invention;

[0039] Figure 8(b) is a schematic diagram of the fixing points of the front subframe assembly with suspension pad assembly of the present invention;

[0040] Figure 8(c) is a schematic diagram of the mounting holes for the front subframe assembly with the lower anti-collision beam assembly of the present invention;

[0041] Figure 8(d) is a schematic diagram of the front subframe assembly of the present invention with the control arm assembly fixing point;

[0042] Figure 9(a) is a schematic diagram of the fixing hole locations of the rear subframe with suspension assembly and left and right longitudinal beam assemblies of the present invention.

[0043] Figure 9(b) is a top view of the rear subframe with suspension assembly of the present invention;

[0044] Figure 9(c) is a top view of the rear subframe with suspension assembly, a schematic diagram of the present invention.

[0045] Figure 9(d) is a top view of the rear subframe with suspension assembly, a schematic diagram of the present invention.

[0046] Figure 10(a) is a diagram showing the installation points of the three-in-one electric assembly (motor, controller, and gearbox) and the suspension pad assembly of the present invention.

[0047] Figure 10(b) is a diagram showing the installation points of the three-in-one electric assembly (motor, controller, and gearbox) and the suspension pad assembly of the present invention.

[0048] Figure 11(a) is a schematic diagram of the three-in-one electric assembly of the rear drive motor, controller and gearbox of the present invention;

[0049] Figure 11(b) is a schematic diagram of the three-in-one electric assembly of the rear drive motor, controller and gearbox of the present invention;

[0050] Figure 12(a) is a schematic diagram of the front suspension structure of the present invention;

[0051] Figure 12(b) is a schematic diagram of the front suspension structure of the present invention;

[0052] Figure 12(c) is a schematic diagram of the front suspension structure of the present invention;

[0053] Figure 13(a) is a schematic diagram of the rear suspension structure of the present invention;

[0054] Figure 13(b) is a schematic diagram of the rear suspension structure of the present invention;

[0055] Figure 13(c) is a schematic diagram of the rear suspension structure of the present invention;

[0056] Figure 14 This is a front view of the fixing point of the battery power module with sill assembly and the fixing point of the front floor body of the present invention.

[0057] Figure 15(a) is a schematic diagram of the left front steering knuckle with disc brake assembly at the front suspension of the present invention;

[0058] Figure 15(b) is a schematic diagram of the right front steering knuckle with disc brake assembly at the front suspension of the present invention;

[0059] Figure 15(c) is a schematic diagram of the left rear disc brake assembly at the rear suspension of the present invention;

[0060] Figure 15(d) is a schematic diagram of the right rear disc brake assembly at the rear suspension of the present invention.

[0061] The diagram exaggerates the spacing or dimensions between parts to show their positions; the diagram is for illustrative purposes only.

[0062] The components include: 1. Engine compartment assembly; 2. Front floor sill assembly; 3. Rear floor assembly; 4. Front subframe assembly; 5. Rear subframe assembly with mounts; 6. Electric motor, motor controller, and gearbox integrated electric assembly; 7. Rear drive motor, motor controller, and gearbox integrated electric assembly; 8. Battery power module; 9. Front suspension; 10. Rear suspension; 11. Front brake assembly; 12. Rear brake assembly; 13. Powertrain mounting system.

[0063] 110. Front end structure assembly; 111. Right front longitudinal beam assembly; 112. Left front longitudinal beam assembly; 113. Right front shock absorber mount; 114. Left front shock absorber mount; 71. Front suspension bracket - rear drive; 72. Right suspension cushion assembly - rear drive; 73. Left suspension cushion assembly - rear drive; 91. Left front air spring strut assembly; 92. Right front air spring strut assembly; 93. Left upper front control arm assembly; 94. Right upper front control arm assembly; 95. Left upper rear control arm assembly; 96. Right upper rear control arm assembly; 9 7. Left front lower control arm assembly; 98. Right front lower control arm assembly; 99. Front lower control arm assembly; 101. Left rear trailing arm assembly; 102. Right rear trailing arm assembly; 103. Tie rod assembly; 105. Left rear upper control arm assembly; 106. Right rear upper control arm assembly; 107. Rear lower control arm assembly; 109. Rear upper control arm assembly; 111. Left rear air spring assembly; 112. Right rear air spring assembly; 113. Left rear shock absorber assembly; 114. Right rear shock absorber assembly. Detailed Implementation

[0064] It should be noted that the following detailed description is illustrative and intended to provide further explanation of the invention. Unless otherwise specified, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0065] Example 1

[0066] In a typical embodiment of the present invention, reference is made to Figures 1(a) - 15(d) As shown, a universal pure electric vehicle platform includes a lower body, subframe, and suspension. The lower body comprises an engine compartment assembly 1, a front floor sill assembly 2, and a rear floor assembly 3; the subframe includes a front subframe assembly 4 and a rear subframe with mounting brackets 5; and the suspension includes a front suspension 9 and a rear suspension 10. It also includes a motor, a motor controller, a gearbox, and a three-in-one electric powertrain 6; a rear drive motor, a motor controller, and a gearbox, and a three-in-one electric powertrain 7; a battery power module 8; a front brake assembly 11; a rear brake assembly 12; and a powertrain mounting system 13.

[0067] like Figure 2 As shown, the engine compartment assembly 1 includes a differential front end structure assembly 110, and common components such as a right front longitudinal beam assembly 111, a left front longitudinal beam assembly 112, a right front shock absorber mount 113, and a left front shock absorber mount 114.

[0068] like Figures 3(a) - 3(b) As shown, the left front longitudinal beam assembly 112 is used to fix the three mounting points on the left side of the front subframe assembly 4, with the center point coordinates being: {(-377, -477, 30), (-77, -425, 64.5), (276, -414, -93.6)}. The right front longitudinal beam assembly 111 is used to fix the three mounting points on the right side of the front subframe assembly 4, with the center point coordinates being: {(-377, 477, 30), (-77, 425, 64.5), (276, 414, -93.6)}.

[0069] like Figures 3(c) - 4(b) As shown, the left front shock absorber mount 114 and the right front shock absorber mount 113 are castings with a tower structure in the middle, with a circular through hole in the middle. Three waist-shaped holes are evenly distributed around the circular through hole, which are used to fix the left front air spring slide assembly. The center point coordinates of the waist-shaped holes are: {(-10.88, -448.58, 480.39), (49.07, -544.16, 498.82), (103.03, -447.34, 470.86)}, and to fix the right front air spring slide assembly 92. The center point coordinates of the waist-shaped holes are: {(-10.88, 448.58, 480.39), (49.07, 544.16, 498.82), (103.03, 447.34, 470.86)}.

[0070] The left and right front shock absorber mounts are hollow, hexahedral-like structures. After removing the bottom and front surfaces, they become four-sided closed structures. Behind the tetrahedron are two inverted U-shaped grooved reinforcing ribs with two sets of circular holes, used to fix the upper left front control arm assembly and the upper left rear control arm assembly, respectively. The center point coordinates of the two sets of circular holes on the inverted U-shaped grooved reinforcing ribs are: {(-126.83, -448.85, 379.21), (-77.01, -449.98, 371.02)}, {(148.15... The coordinates of the center points of the two sets of circular holes at the upper right front control arm assembly and the upper right rear control arm assembly are: {(-126.83, 448.85, 379.21), (-77.01, 449.98, 371.02)} and {(148.15, 455.1, 333.97), (197.97, 456.23, 325.78)}. These fixing points are common fixing points for the engine compartment assembly, front subframe assembly, and front suspension. They effectively fix the above assemblies into a rigid body structure.

[0071] like Figures 5(a) - 5(c) As shown, the front floor sill assembly structure includes a common left sill assembly and a right sill assembly, as well as a front floor body. The left sill assembly 9 has four mounting points on the left side for fixing the battery power module, with center point coordinates of {(693.35, -778, -173), (978.35, -778, -173), (1698.35, -778, -173), (1873.35, -778, -173)}. The right sill assembly 10 has four mounting points on the right side for fixing the battery power module, with center point coordinates of {( The coordinates of the center point of the front floor body are: {(1401.85, -430, -85), (1401.85, -170, -85), (1401.85, 170, -85), (1401.85, 170, -85), (1401.85, 430, -85)}.

[0072] like Figures 6(a) - 7(b)The rear floor assembly structure includes a common left and right rear longitudinal beam assembly. The lower surface of the left rear longitudinal beam assembly has three mounting holes. The middle hole is used to mount the left rear air spring assembly, with center point coordinates of (3063.57, -468.06, 112.19). The other two holes are used to mount the two mounting points on the left side of the rear subframe with suspension assembly, with center point coordinates of {(2568, -570, -67), (3305, -510, 60.5)}. The left and right rear longitudinal beam assemblies are integrated with the wheel arches. The inner surface of the wheel arches has two reinforcing ribs, with two holes at these ribs for mounting the left rear shock absorber assembly, with center point coordinates of {(2967.58, -581.74, 363.81), (3089.84, -607.47, 367.77)}.

[0073] Correspondingly, the lower surface of the right rear longitudinal beam assembly has three mounting holes. The middle hole is used to fix the right rear air spring assembly, with center point coordinates of (3063.57, 468.06, 112.19). The other two holes are used to fix the two mounting points on the right side of the rear subframe with suspension assembly, with center point coordinates of {(2568, 570, -67) and (3305, 510, 60.5)}. The inner surface of the wheel arch has two reinforcing ribs, with two holes at these ribs for fixing the right rear shock absorber assembly, with center point coordinates of {(2967.58, 581.74, 363.81) and (3089.84, 607.47, 367.77)}. These fixing points are common to the rear floor assembly, rear subframe with suspension assembly, and rear suspension. They effectively fix the above assemblies into a rigid structure.

[0074] like Figures 8(a) - 8(d) The front subframe assembly 4 is formed by welding an H-shaped welded structure (long side) and a trapezoidal welded structure. Each side of the short side of the H-shaped welded structure has a symmetrical triangular mounting plate and three mounting bolts for fixing the lower anti-collision beam assembly. The center point coordinates of the three mounting holes on the left are {(-443, 407, -66), (-443, 458, -161), (-443, 356, -161)}, and the center point coordinates of the three mounting holes on the right are {(-443, -407, -66), (-443, -458, -161), (-443, -356, -161)}. Two 7-shaped flange brackets are symmetrically welded on both sides of the upper surface of the H-shaped welded body. The brackets have mounting holes for the right front longitudinal beam assembly 111 and the left front longitudinal beam assembly 112. The center point coordinates are as follows: {right front (-377, 477, 30), right rear (-77, 425, 64.5), left front (-377, -477, 30), left rear (-77, -425, 64.5)}.

[0075] The trapezoidal structure has two symmetrical mounting holes for the body (right front longitudinal beam assembly and left front longitudinal beam assembly) in the triangular areas on both sides. The center point coordinates are: right (276, 414, -93.6) and left (276, -414, -93.6). This allows the front subframe assembly 4 to be installed with the front longitudinal beam assembly through a total of six mounting points on the left and right sides.

[0076] The trapezoidal structure has four symmetrically distributed mounting holes on each of its two triangular regions. The right side is used to fix the right suspension soft pad assembly, and the left side is used to fix the left suspension soft pad assembly. The center point coordinates of the holes are: {Right (300.5, 225, -90), (285.5, 333, -90), (180, 362.8, -90), (165, 285, -90)}, {Left (300.5, -225, -90), (285.5, -333, -90), (180, -362.8, -90), (165, -285, -90)}. The motor, motor controller, and gearbox three-in-one electric assembly 6, together with the front suspension soft pad assembly, right suspension soft pad assembly, and left suspension soft pad assembly, forms an assembly that is fixedly connected to the front subframe assembly through the mounting holes. The coordinates of the right suspension soft pad assembly holes in the assembly are: {Rear left (300.5, 224.25, -90), Rear right (285.5, 333, -90), Front right (180, 362.8, -90), Front left (165, 285, -90)}, and the coordinates of the left suspension soft pad assembly holes in the assembly are: {Rear right (300.5, -224.25, -90), Rear left (285.5, -333, -90), Front left (180, -362.8, -90), Front right (165, -285, -90)}. This ensures that the installation method and mounting points of the motor, motor controller, and gearbox integrated electric assembly 6 remain unchanged with the front subframe assembly.

[0077] The trapezoidal structure has three mounting holes on its upper bottom edge for fixing to the front suspension soft pad assembly. The center point coordinates of the holes are {(-125, 37, -143), (-7, -35, -90), and (-115, -99, -143). Correspondingly, the coordinates of the holes in the front suspension soft pad assembly are: {Right front (-125, 37, -143), Left front (-115, -99, -143), Rear center (-7, -35, -143)}, thus realizing the installation of the front suspension soft pad assembly.

[0078] On each side of the H-shaped welded structure, two inverted U-shaped (with flanged) stamped parts are welded. Each U-shaped stamped part has bolt mounting holes on both sides of its two vertical plates, and a countersunk structure is stamped to improve surface fit accuracy and increase structural strength. The mounting hole coordinates for the right front U-shaped stamped part (used to fix the right front lower control arm assembly) are: {(-342.03, 437.96, -137.2), (-278.05, 389.43, -136.87)}. The mounting hole coordinates for the left front U-shaped stamped part (used to fix the left front lower control arm assembly) are: {(-342.03, -437.96, -137.2), (-278.05, -389.43, -136.87)}. The mounting hole coordinates of the right rear U-shaped stamping (used to fix the front lower control arm assembly) are: {(-36.63, 403.96, -129.88), (43.63, 406.34, -130.53)}. The mounting hole coordinates of the left rear U-shaped stamping (used to fix the front lower control arm assembly) are: {(-36.63, -403.96, -129.88), (43.63, -406.34, -130.53)}.

[0079] like Figures 9(a) - 9(d)The rear subframe with suspension assembly is die-cast from an H-shaped cast aluminum part. The four corners of the die-cast part have round soft pads and are fixed to the lower body of the vehicle body by bolts to the left rear longitudinal beam assembly and the right rear longitudinal beam assembly respectively. ① The coordinates of the four corner mounting holes of the die-cast part are as follows: {Right front (2568, 570, -67.04), Right rear (3305, 510, 60.25), Left front (2568, -570, -67.04), Left rear (3305, -510, 60.25)}. A mounting hole for the front suspension bracket-rear drive soft pad is located in the middle of the front crossbeam of the H-shaped cast aluminum part, and the soft pad is integrated with the casting to form a single structure. On both sides of the rear crossbeam of the H-shaped cast aluminum part, there are raised U-shaped reinforcing ribs. The middle of the reinforcing ribs has mounting holes for snapping and fixing the right suspension soft pad assembly-rear drive and the left suspension soft pad assembly-rear drive. The coordinates of the two sets of mounting holes on the side reinforcing ribs are: {Right outer (3298, 265, 36.5), Right inner (3298, 185, 36.5)}. .5), Left outer (3298, -265, 36.5), Left inner (3298, -185, 36.5)}, There is a round hole in the middle of the front crossbeam of the H-shaped cast aluminum part with the rear drive front suspension pad assembly, and the coordinates of the mounting hole of the front suspension bracket-rear drive are: (2723.5, 10, -141). There is a diagonal U-shaped reinforcing rib in the middle of the body mounting bushing and suspension pad assembly of the rear crossbeam of the H-shaped cast aluminum part, which is used to fix the right rear upper control arm assembly and the left rear upper control arm assembly. The arm assembly has two sets of mounting holes with the coordinates of: {Right Rear Front (3221.44, 382.66, 70.95), Right Rear Rear (3262.56, 407.34, 73.05)}, {Left Rear Front (3221.44, -382.66, 70.95), Left Rear Rear (3262.56, -407.34, 73.05)}. The two longitudinal beams on either side of the H-shaped cast aluminum part are semi-circular arc-shaped structural components with large circular holes. The right rear drive shaft... The assembly connects to the right output shaft of the three-in-one electric assembly (rear drive motor, motor controller, and gearbox), passes through the round hole in the right longitudinal beam, and is fixed to the right rear disc brake assembly. The left rear drive shaft assembly connects to the left output shaft of the three-in-one electric assembly (rear drive motor, motor controller, and gearbox), passes through the round hole in the left longitudinal beam, and is fixed to the left rear disc brake assembly. A U-shaped groove with a set of waist-shaped holes is opened at the root of the front end of the longitudinal beam for fixing the tie rod assembly. The left and right sides are symmetrical, and the tie rod assembly is universal. The center coordinates of the two sets of U-shaped mounting holes are: {Right front (2718.23, 431.38, -22.11), Right rear (2762.16, 424.62, -29.14)}, {Left front (2718.23, -431.38, -22.11), Left rear (2762.16, -424.62, -29.14)}. The longitudinal beams on both sides of the H-shaped cast aluminum part have U-shaped grooves with a set of holes near the high point of the round holes for fixing the upper rear control arm assembly. The upper rear control arm assembly is symmetrical on both sides and is universal.The center coordinates of the two sets of U-shaped mounting holes are: {Right front (2819.19, 418.81, 77.99), Right rear (2866.82, 413.22, 75.95)}, {Left front (2819.19, -418.81, 77.99), Left rear (2866.82, -413.22, 75.95)}.

[0080] A U-shaped groove structure is provided on the outer side where the front crossbeam overlaps with the two side vertical beams. The vertical surface of the U-shaped groove structure has two mounting holes for fixing the right and left rear trailing arm assemblies. The coordinates of the two sets of mounting holes are: {Right Rear Front (2636.51, -525.01, -95.7), Right Rear Rear (2701.14, -462.38, -96.3)}, {Left Rear Front (2636.51, 525.01, -95.7), Left Rear Rear (2701.14, 462.38, -96.3)}, under the H-shaped cast aluminum part. There is a reinforcing crossbeam at about 1 / 3 of the rear of the square section with rounded corners. The two ends of the crossbeam have U-shaped grooves and two sets of U-shaped mounting holes for fixing the rear lower control arm assembly (symmetrical and universal). The center coordinates of the two sets of U-shaped mounting holes are: {Right front (3075.18, 259.85, -155.42), Right rear (3153.43, 276.31, -152.88)}, {Left front (3075.18, -259.85, -155.42), Left rear (3153.43, -276.31, -152.88)}.

[0081] like Figures 11(a) - 11(b) The three-in-one electric assembly 7, consisting of the rear drive motor, motor controller, and gearbox, together with the front suspension bracket-rear drive 71, the right suspension soft pad assembly-rear drive 72, and the left suspension soft pad assembly-rear drive 73, and the mounting holes, constitute an assembly assembly. This assembly is matched and fixedly connected to the mounting holes of the rear subframe with the suspension assembly 5.

[0082] The coordinates of the front suspension bracket-rear drive hole are (2724, 10, -141). The coordinates of the right suspension pad assembly-rear drive hole of the assembly are: {right (3298.75, 264.9, 36.5), left (3298.75, 185.1, 36.5)}. The coordinates of the left suspension pad assembly-rear drive hole of the assembly are: {right (3297.25, -185.1, 36.5), left (3297.25, -264.9, 36.5)}.

[0083] like Figures 12(a) - 12(c)Front suspension assembly: including left front air spring strut assembly 91{(-10.88, -448.58, 480.39), (49.07, -544.16, 498.82), (103.03, -447.34, 470.86)} and right front air spring strut assembly 92{(-10.88, 448.58, 480.39), (49.07, 544.16, 498.82), (103.03, 447.34, 470.86)}.

[0084] Left upper front control arm assembly 93{(-126.79, -448.8, 379.42), (-77.54, -450.02, 370.89)}, right upper front control arm assembly 94{(-126.79, 448.8, 379.42), (-77.54, 450.02, 370.89)}, left upper rear control arm assembly 95{(148.61, -455.13, 333.7), (198, -456.22, 325.96)}, right upper rear control arm assembly 96{(148.61, 455.13, 333.7), (198, 456.22, 325.96)}, left front lower control arm assembly 97{( -341.9, -437.88, -137.21), (-278.18, -389.51, -136.86)}, Right front lower control arm assembly 98 {(-341.9, 437.88, -137.21), (-278.18, 389.51, -136.86)}, Front lower control arm assembly 99 (symmetrical universal) {(-36.48, -403.99, -129.89), (43.48, -406.31, -130.53)}, Front lower control arm 99 (symmetrical universal) {(-36.48, 403.99, -129.89), (43.48, 406.31, -130.53)}. The above components together form the front suspension, which is fixedly connected to the engine compartment assembly and the front subframe assembly of the lower body. Specifically, the left front air spring strut assembly 91 and the right front air spring strut assembly 92 are fixed to the left front shock absorber mount 114 and the right front shock absorber mount 113 of the engine compartment assembly 1. The fixing points are universally designed and assembled, and the suspension stiffness is adjusted only by regulating the air pressure according to calibration parameters, meeting the suspension stiffness requirements of different vehicle types.

[0085] The bushings in the left front lower control arm assembly 97 (composed of the left front lower control arm body and the front lower control arm bushing), the right front lower control arm assembly 98 (composed of the right front lower control arm body and the front lower control arm bushing), and the front lower control arm assembly 99 (symmetrical and universal, composed of the front lower control arm body and the front lower control arm bushing) are respectively fixedly connected to the grooves of the "right front U-shaped stamping, left front U-shaped stamping, right rear U-shaped stamping, and left rear U-shaped stamping" of the front subframe assembly.

[0086] like Figures 13(a) - 13(c)The rear suspension assembly includes the left rear trailing arm assembly 101 {(2636.45, -524.93, -95.59), (2701.21, -462.43, -96.25)}, the right rear trailing arm assembly 102 {(2636.51, 525.01, -95.7), (2701.14, 462.38, -96.3)}, the tie rod assembly 103 (symmetrical and universal) {(2718.23, -431.36, -22.11), (2762.16, -424.64, -29.14)}, and the tie rod assembly (symmetrical and universal) {( 2718.23, 431.36, -22.11), (2762.16, 424.64, -29.14)}, Left rear upper control arm assembly 105 {(3221.45, -382.64, 70.95), (3262.55, -407.36, 73.05)}, 6. Right rear upper control arm assembly 106 {(3221.45, 382.64, 70.95), (3262.55, 407.36, 73.05)}, Rear lower control arm assembly 107 (symmetrical universal) {(3075.21, -259.72, -15 5.42), (3153.4, -276.43, -152.88)}, Rear lower control arm assembly (symmetrical universal) {(3075.21, 259.72, -155.42), (3153.4, 276.43, -152.88)}, Rear upper control arm assembly 109 (symmetrical universal) {(2819.18, -418.79, 78), (2866.82, -413.21, 76)}, Rear upper control arm assembly (symmetrical universal) {(2819.18, 418.79, 77.99), (2866.82, 413.2 The following components are included: 1. Rear left air spring assembly 111 (3063.57, -468.06, 112.19); 2. Rear right air spring assembly 112 (3063.57, 468.06, 112.19); 3. Rear left shock absorber assembly 113 (2967.46, -582.32, 363.88, (3089.96, -606.89, 367.67); 4. Rear right shock absorber assembly 114 (2967.47, 582.27, 363.91, (3089.95, 606.93, 367.71)). These components together form the rear suspension, which is fixedly connected to the rear floor assembly and the rear subframe with suspension assembly of the lower vehicle body.

[0087] The left rear shock absorber assembly 113, the right rear shock absorber assembly 114, the left rear air spring assembly 111, the right rear air spring assembly, and the left and right rear longitudinal beam assemblies of the rear floor assembly 112 are fixed together. The fixing points are designed and assembled in a universal manner. The stiffness of the suspension is adjusted by adjusting the air pressure only by calibrating the parameters, so as to meet the suspension stiffness requirements of different vehicle types.

[0088] The bushing assemblies in the left rear trailing arm assembly (composed of the trailing arm body and trailing arm bushing assembly), the right rear trailing arm assembly (composed of the trailing arm body and trailing arm bushing assembly), the tie rod assembly (symmetrical and universal, composed of the tie rod body and bushing assembly), the rear upper control arm assembly (symmetrical and universal, composed of the rear control arm body and rear control arm bushing assembly), the left rear upper control arm assembly (composed of the left rear upper control arm body, the rear upper control arm inner bushing and the rear upper control arm outer bushing assembly), the right rear upper control arm assembly (composed of the right rear upper control arm body, the rear upper control arm inner bushing and the rear upper control arm outer bushing assembly), and the rear lower control arm assembly (symmetrical and universal, composed of the rear lower control arm bushing assembly and the rear lower control arm welded assembly) are respectively installed and fixedly connected to the corresponding "U-shaped groove" of the rear subframe.

[0089] like Figure 14 As shown, the battery power module is encapsulated by an external upper and lower housing. The lower housing has extruded mounting structures on both sides, each with four circular holes for fixing to the left and right sill assemblies of the front floor sill assembly. The center coordinates of the left hole are: {(693.35, -778, -173), (978.35, -778, -173), (1698.35, -778, -173), (1873.35, -778, -173)}, and the center coordinates of the right hole are: {(693.35, 777.99, -173), (978.35, 777.99, -173), (1698.35, 777.99, -173), (1873.35, 777.99, -173)}.

[0090] The battery power module has a reinforcing longitudinal beam in the middle, which can improve the modal and rigidity of the battery module. The longitudinal beam has four openings. By connecting the longitudinal beam, the upper shell of the battery module and the front floor body, the lower body and the battery module can be integrated into a rigid body to improve side impact resistance and torsional rigidity. There are four circular holes on the surface of the longitudinal beam and the upper shell inside the battery module. The center coordinates of the holes are: {(1401.85, -430, -85), (1401.85, -170, -85), (1401.85, 170, -85), (1401.85, 430, -85)}.

[0091] likeFigures 15(a) - 15(d) Front brake assembly: includes the left front steering knuckle disc brake assembly and the right front steering knuckle disc brake assembly. The left front steering knuckle disc brake assembly includes the left upper front control arm assembly with 93 fixed points (8.26, -674.09, 370.22), the left upper rear control arm assembly with 95 fixed points (76.45, -678.39, 370.22), the left front lower control arm assembly with 97 fixed points {(-74.51, -741.14, -158.96), (-74.58, -743.38, -186.87)}, and the front lower control arm assembly with 99 fixed points {(-6.65, -749.15, -186.78), (-6.58, -746.92, -158.87)}. The right front steering knuckle with disc brake assembly includes 94 fixed points (8.26, 674.09, 370.22) for the upper right front control arm assembly, 96 fixed points (76.45, 678.39, 370.22) for the upper right rear control arm assembly, 98 fixed points {(-74.51, 741.14, -158.96), (-74.34, 743.25, -191.88)} for the upper right rear control arm assembly, and 99 fixed points {(-6.41, 749.07, -191.65), (-6.58, 746.92, -158.87)} for the lower front control arm assembly.

[0092] The rear brake assembly includes a left rear disc brake assembly and a right rear disc brake assembly. The left rear disc brake assembly includes a rear upper control arm assembly with 109 fixed points {(2848.67, -752.48, 97.39), (2917.14, -744.24, 94.51)}, a left rear upper control arm assembly with 105 fixed points {(2966.15, -728.35, 98.12), (2997.41, -747.31, 99.72)}, and a rear lower control arm assembly. Fixed points 107 for the boom assembly: {(2985.17, -735.77, -153.49), (3043.85, -748.12, -151.59)}; fixed points 101 for the left rear trailing arm assembly: {(2876.43, -795.83, -185.62), (2902.64, -770.24, -185.87)}; fixed points 103 for the tie rod assembly: {(2748.29, -707.38, -22.64), (2815). 65, -696.84, -33.42)}, where the right rear disc brake assembly includes the rear upper control arm assembly 109 fixing points {(2848.67, 752.3, 97.39), (2917.14, 744.24, 94.51)}, the right rear upper control arm assembly 106 fixing points {(2966.15, 728.35, 98.12), (2997.42, 747.12, 99.71)}, and the rear lower control arm assembly 107 fixing points {(29 85.17, 735.77, -153.49, (3043.85, 748.12, -151.59)}, right rear trailing arm assembly 102 fixing point {(2876.43, 795.83, -185.62), (2902.64, 770.43, -185.87)}, tie rod assembly 103 fixing point {(2748.29, 707.38, -22.64), (2815.65, 696.84, -33.42)}.

[0093] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A universal pure electric vehicle platform lower body, subframe, and suspension, characterized in that, The lower body includes the engine compartment assembly, the front floor sill assembly, and the rear floor assembly. The left and right front longitudinal beam assemblies in the engine compartment assembly, being common components, share the same mounting hole coordinates as the front subframe. Similarly, the left and right sill assemblies in the front floor sill assembly, being common components, share the same mounting hole coordinates as the battery power module. The left and right rear longitudinal beam assemblies in the rear floor assembly, being common components, share the same mounting hole coordinates as the corresponding rear subframe with its suspension assembly. The mounting hole coordinates of the front suspension and the front subframe are also common. The mounting hole coordinates of the rear suspension and the rear subframe with its suspension assembly are also common, ensuring consistency in the assembly methods between the lower body, subframe, and suspension.

2. The universal pure electric vehicle platform lower body, subframe, and suspension according to claim 1, characterized in that, The mounting point coordinates on the left and right front longitudinal beam assemblies are the same, and are used to fix them to the left and right sides of the front subframe, respectively.

3. The universal pure electric vehicle platform lower body, subframe, and suspension according to claim 1, characterized in that, The left front longitudinal beam assembly and the right front longitudinal beam assembly are respectively connected to the universal left front shock absorber mount and right front shock absorber mount on their rear sides. The shock absorber mount and the front air spring strut assembly of the front suspension are respectively provided with universal mounting point coordinates for mutual installation.

4. The universal pure electric vehicle platform lower body, subframe, and suspension according to claim 3, characterized in that, The shock absorber mount and the front control arm assembly of the front suspension are respectively provided with common mounting point coordinates for mutual installation.

5. The universal pure electric vehicle platform lower body, subframe, and suspension according to claim 1, characterized in that, The front floor sill assembly also includes a front floor body, and the left sill assembly and right sill assembly are respectively fixed to the left and right sides of the battery power module. The front floor body and the battery power module's built-in longitudinal beams and upper and lower housings are provided with corresponding universal installation point coordinates.

6. The universal pure electric vehicle platform lower body, subframe, and suspension according to claim 1, characterized in that, The left and right rear longitudinal beam assemblies each have three fixing holes. The middle hole is used to fix the left and right rear air spring assemblies of the rear suspension, and the corresponding mounting point coordinates are universal. The other fixing holes fix the rear subframe belt suspension assembly from the left and right sides, respectively, and the corresponding mounting point coordinates are universal.

7. The universal pure electric vehicle platform lower body, subframe, and suspension according to claim 1, characterized in that, The front subframe is formed by welding an H-shaped welded body and a trapezoidal welded body together to form a welded structure body. It is connected to the corresponding mounting hole points of the left front longitudinal beam assembly and the right front longitudinal beam assembly through the triangular areas on both sides of the H-shaped welded body and the trapezoidal welded body.

8. The universal pure electric vehicle platform lower body, subframe, and suspension according to claim 7, characterized in that, Two inverted U-shaped stamped parts are welded to each side of the H-shaped welded body for fixed connection with the front lower control arm assembly of the front suspension, and the installation point coordinates are universal.

9. The universal pure electric vehicle platform lower body, subframe, and suspension according to claim 1, characterized in that, The rear subframe with suspension assembly is die-cast from an H-shaped cast aluminum part. The four corners of the die-cast part have circular soft pads, which are connected to the corresponding mounting holes of the left and right rear longitudinal beam assemblies of the vehicle body by bolts.

10. The universal pure electric vehicle platform lower body, subframe, and suspension according to claim 1, characterized in that, The rear subframe with suspension assembly has universal mounting points corresponding to the suspension pad assembly. There are oblique U-shaped reinforcing ribs between the body mounting bushing of the H-shaped cast aluminum rear crossbeam and the suspension pad assembly, which are used to fix the corresponding mounting points of the rear suspension, and the coordinates of the mounting points are universal.

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