Universal lower vehicle body, subframe, and suspension for pure electric vehicle platform

Abstract

A universal lower vehicle body, sub-frame, and suspension for a pure electric vehicle platform. The lower vehicle body comprises an engine compartment assembly (1), a front floor sill assembly (2), and a rear floor assembly (3). The mounting hole coordinates of a left front longitudinal beam assembly (112) and a right front longitudinal beam assembly (111), which serve as universal parts in the engine compartment assembly, corresponding to a front subframe assembly (4) are universal. The mounting hole coordinates of a left sill assembly and a right sill assembly, which serve as universal parts in the front floor sill assembly, corresponding to a battery power module (8) are universal. The mounting hole coordinates of a left rear longitudinal beam assembly and a right rear longitudinal beam assembly, which serve as universal parts in the rear floor assembly, corresponding to a rear subframe with mount assembly (5) are universal. The mounting hole coordinates of a front suspension (9) corresponding to the front subframe assembly are universal. The mounting hole coordinates of a rear suspension (10) corresponding to the rear subframe with mount assembly are universal. Therefore, the lower vehicle body, the subframe, and the suspension are assembled in a consistent manner.

Description

A universal pure electric vehicle platform for the lower body, subframe, and suspension.

[0001] This disclosure claims priority to Chinese patent application No. 202411618933.7, filed on November 13, 2024, entitled "A Universal Pure Electric Vehicle Platform Lower Body, Subframe and Suspension", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This disclosure relates to the field of electric vehicle technology, and in particular to a general-purpose pure electric vehicle platform lower body, subframe, and suspension. Background Technology

[0003] 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 system, intelligent cockpit, and autonomous driving is making cars more and more 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.

[0004] For the lower body, subframe, and suspension of the vehicle, it is difficult to achieve co-line assembly and production of all electric vehicles on the same platform. For example, when the weight of each model changes, the tuning parts of the car need to be redesigned and tuned, and different mounting points and mounting methods make it impossible to achieve co-line assembly and production of electric vehicles. Differentiated parts and mounting methods increase the number and variety of platform parts, as well as the differentiated development and management costs. Summary of the Invention

[0005] 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.

[0006] To achieve the above objectives, this disclosure provides the following technical solution:

[0007] A universal pure electric vehicle platform includes a lower body, subframe, and suspension, comprising an engine compartment assembly, a front floor sill assembly, and a rear floor assembly; a subframe including a front subframe assembly and a rear subframe with mounting brackets; and a suspension including a front suspension and a rear suspension.

[0008] The mounting hole coordinates of the left and right front longitudinal beam assemblies, which are common components in the engine compartment assembly, are the same as those of the front subframe assembly.

[0009] The left and right door sill assemblies, which are common components in the front floor door sill assembly, share the same mounting hole coordinates as the battery power module.

[0010] The left and right rear longitudinal beam assemblies, which are common components in the rear floor assembly, share the same mounting hole coordinates with the corresponding rear subframe with suspension assembly.

[0011] The mounting hole coordinates of the front suspension and the front subframe assembly are the same; the mounting hole coordinates of the rear suspension and the rear subframe with suspension assembly are the same, so as to ensure that the assembly method between the lower body and the subframe and suspension is consistent.

[0012] 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.

[0013] 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 left front shock absorber mount and the left front air spring strut assembly of the front suspension are respectively provided with universal mounting point coordinates for mutual installation. The right front shock absorber mount and the right front air spring strut assembly of the front suspension are respectively provided with universal mounting point coordinates for mutual installation.

[0014] As a further implementation, the shock absorber mount and the front control arm assembly of the front suspension are provided with universal mounting point coordinates for mutual installation.

[0015] As a further implementation, the front floor sill assembly also includes a front floor body, the left sill assembly and the right sill assembly are respectively fixed to the left and right sides of the battery power module, and 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.

[0016] As a further implementation, the left rear longitudinal beam assembly and the right rear longitudinal beam assembly are each provided with three fixing holes. The middle hole is used to fix the left rear air spring assembly and the right rear air spring assembly of the rear suspension, and the corresponding mounting point coordinates are universal. The other fixing holes fix the rear subframe with suspension assembly from the left and right sides, respectively, and the corresponding mounting point coordinates are universal.

[0017] As a further implementation, the front subframe assembly is formed by welding an H-shaped welded body and a trapezoidal welded body to form a welded structure body, and 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.

[0018] As a further implementation, two inverted U-shaped stamped parts are welded to both sides 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.

[0019] 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.

[0020] As a further implementation, the rear subframe with suspension assembly is provided with 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 mounting points corresponding to the rear suspension, and the coordinates of the mounting points are universal.

[0021] The beneficial effects of the present invention are as follows:

[0022] 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 rear longitudinal beam assembly and right rear longitudinal beam assembly 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 assembly and the front subframe assembly, 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.

[0023] 2. This invention enables the battery power module to be universal and the assembly method to remain consistent 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 pad assembly, right suspension pad assembly, and left suspension pad assembly) pads, and the identical fixing methods, hole positions, and structures, 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 pad assembly-rear drive, and left suspension pad assembly-rear drive) pads, and the identical fixing methods, hole positions, and structures, allows for universal assembly with the rear subframe welding assembly.

[0024] 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

[0025] 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.

[0026] Figure 1(a) is a top view of a lower body, subframe, and suspension provided in an embodiment of this disclosure;

[0027] Figure 1(b) is a front view of a lower vehicle body, subframe, and suspension provided in an embodiment of this disclosure;

[0028] Figure 1(c) is a bottom view of a lower body, subframe, and suspension provided in an embodiment of this disclosure;

[0029] Figure 2 is an engine compartment assembly provided in an embodiment of this disclosure;

[0030] Figure 3(a) is a schematic diagram of a right front longitudinal beam assembly with a front subframe assembly (right side) mounting point provided in an embodiment of this disclosure;

[0031] Figure 3(b) is a schematic diagram of a left front longitudinal beam assembly with a front subframe assembly (left side) mounting point provided in an embodiment of this disclosure;

[0032] Figure 3(c) is a schematic diagram of the fixing point of a left front shock absorber mount with a left front air spring slide column assembly provided in an embodiment of this disclosure;

[0033] Figure 3(d) is a schematic diagram of a left front shock absorber mount with a control arm assembly fixing point provided in an embodiment of this disclosure;

[0034] Figure 4(a) is a schematic diagram of the fixing point of a right front shock absorber mount with a right front air spring slide column assembly provided in an embodiment of this disclosure;

[0035] Figure 4(b) is a schematic diagram of a right front shock absorber mount with a control arm assembly fixing point provided in an embodiment of this disclosure;

[0036] Figure 5(a) is a schematic diagram of a left door sill assembly with a battery power module fixed point on the left side, provided in an embodiment of this disclosure.

[0037] Figure 5(b) is a schematic diagram of a right sill assembly with a battery power module right-side fixing point provided in an embodiment of this disclosure;

[0038] Figure 5(c) is a schematic diagram of the fixing point of the longitudinal beam of the front floor body with battery power module provided in an embodiment of this disclosure;

[0039] Figure 6(a) is a schematic diagram of a left rear longitudinal beam assembly with wheel cover structure provided in an embodiment of this disclosure;

[0040] Figure 6(b) is a schematic diagram of a right rear longitudinal beam assembly with wheel cover structure provided in an embodiment of this disclosure;

[0041] Figure 7(a) is a schematic diagram of a left rear longitudinal beam assembly provided in an embodiment of this disclosure;

[0042] Figure 7(b) is a schematic diagram of a right rear longitudinal beam assembly provided in an embodiment of this disclosure;

[0043] Figure 8(a) is a top view of the overall structure of a front subframe assembly provided in an embodiment of this disclosure;

[0044] Figure 8(b) is a schematic diagram of the fixing points of a front subframe assembly with a suspension pad assembly provided in an embodiment of this disclosure;

[0045] Figure 8(c) is a schematic diagram of a front subframe assembly with mounting holes for a lower anti-collision beam assembly provided in an embodiment of this disclosure;

[0046] Figure 8(d) is a schematic diagram of a front subframe assembly with a control arm assembly fixing point provided in an embodiment of this disclosure;

[0047] Figure 9(a) is a schematic diagram of the fixing hole locations of a rear subframe with suspension assembly and left and right longitudinal beam assemblies provided in an embodiment of this disclosure;

[0048] Figure 9(b) is a top view schematic diagram of a rear subframe with suspension assembly provided in an embodiment of this disclosure;

[0049] Figure 9(c) is a top view schematic diagram of a rear subframe with suspension assembly provided in an embodiment of this disclosure;

[0050] Figure 9(d) is a top view schematic diagram of a rear subframe with suspension assembly provided in an embodiment of this disclosure;

[0051] Figure 10(a) is a diagram showing the installation points of a three-in-one electric assembly (motor, controller, and gearbox) and a suspension pad assembly provided in an embodiment of this disclosure.

[0052] Figure 10(b) is a diagram showing the installation points of a three-in-one electric assembly (motor, controller, and gearbox) and a suspension pad assembly provided in an embodiment of this disclosure.

[0053] Figure 11(a) is a schematic diagram of a three-in-one electric assembly consisting of a rear drive motor, a controller, and a gearbox provided in an embodiment of this disclosure;

[0054] Figure 11(b) is a schematic diagram of a three-in-one electric assembly consisting of a rear drive motor, a controller, and a gearbox provided in an embodiment of this disclosure;

[0055] Figure 12(a) is a schematic diagram of a front suspension structure provided in an embodiment of this disclosure;

[0056] Figure 12(b) is a schematic diagram of a front suspension structure provided in an embodiment of this disclosure;

[0057] Figure 12(c) is a schematic diagram of a front suspension structure provided in an embodiment of this disclosure;

[0058] Figure 13(a) is a schematic diagram of a rear suspension structure provided in an embodiment of this disclosure;

[0059] Figure 13(b) is a schematic diagram of a rear suspension structure provided in an embodiment of this disclosure;

[0060] Figure 13(c) is a schematic diagram of a rear suspension structure provided in an embodiment of this disclosure;

[0061] Figure 14 is a front view of the fixing point of the front floor body of a battery power module with a sill assembly according to an embodiment of the present disclosure.

[0062] Figure 15(a) is a schematic diagram of a disc brake assembly on the left front steering knuckle of the front suspension provided in an embodiment of the present disclosure;

[0063] Figure 15(b) is a schematic diagram of a front suspension right front steering knuckle with disc brake assembly provided in an embodiment of this disclosure;

[0064] Figure 15(c) is a schematic diagram of a left rear disc brake assembly at the rear suspension provided in an embodiment of this disclosure;

[0065] Figure 15(d) is a schematic diagram of a right rear disc brake assembly at the rear suspension provided in an embodiment of this disclosure.

[0066] The diagram exaggerates the spacing or dimensions between parts to show their positions; the diagram is for illustrative purposes only.

[0067] The components include: 1. Engine compartment assembly; 2. Front floor sill assembly; 3. Rear floor assembly; 4. Front subframe assembly; 5. Rear subframe with mounting bracket assembly; 6. Electric powertrain assembly consisting of motor, motor controller, and gearbox; 7. Electric powertrain assembly consisting of rear drive motor, motor controller, and gearbox; 8. Battery power module; 9. Front suspension; 10. Rear suspension; 11. Front brake assembly; 12. Rear brake assembly; 13. Powertrain mounting system; 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. 72. Front suspension bracket - Rear drive; 73. Right suspension pad assembly - Rear drive; 74. Left suspension pad assembly - Rear drive; 95. Left front air spring strut assembly; 96. Right front air spring strut assembly; 97. Upper left front control arm assembly; 98. Upper right front control arm assembly; 99. Upper left rear control arm assembly; 90. Upper right rear control arm assembly; 91. Lower left front control arm assembly; 91. Lower right front control arm assembly; 92. Lower front control arm assembly; 93. 101. Control arm assembly; 102. Left rear trailing arm assembly; 103. Right rear trailing arm assembly; 104. 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; 115. Left rear air spring assembly; 116. Right rear air spring assembly; 117. Left rear shock absorber assembly; 118. Right rear shock absorber assembly. Detailed Implementation

[0068] 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.

[0069] In a typical embodiment of the present invention, referring to Figures 1(a)-15(d), a universal pure electric vehicle platform lower body, subframe, and suspension are provided. The pure electric vehicle platform lower body includes 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 assembly 6, a rear drive motor, a motor controller, a gearbox, and a three-in-one electric assembly 7, a battery power module 8, a front brake assembly 11, a rear brake assembly 12, and a powertrain mounting system 13.

[0070] As shown in Figure 2, the engine compartment assembly 1 includes a differential front end structure assembly 110, and 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, which are common components.

[0071] As shown in Figures 3(a) and 3(b), 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)}.

[0072] As shown in Figures 3(c) and 4(a), the left front shock absorber mount 114 and the right front shock absorber mount 113 are castings with a tower-like structure in the middle, with a circular through hole in the middle. Three oblong holes are evenly distributed around the circular through hole, which are used to fix the left front air spring slide assembly 91. The center point coordinates of the oblong 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 oblong holes are: {(-10.88, 448.58, 480.39), (49.07, 544.16, 498.82), (103.03, 447.34, 470.86)}.

[0073] As shown in Figures 3(d) and 4(b), both the left front shock absorber mount 113 and the right front shock absorber mount 114 are hollow structures resembling a hexahedron. After removing the bottom and front surfaces, they become a four-sided closed structure. Behind the tetrahedron are two inverted U-shaped groove reinforcing ribs with two sets of circular holes, used to fix the upper left front control arm assembly 93 and the upper left rear control arm assembly 95, respectively. The coordinates of the center points of the two sets of circular holes in the inverted U-shaped groove reinforcing ribs are: {(-126.83, -448.85, 379.21), (-77.01, -449.98, 371}. The coordinates of the center points of the two sets of circular holes at the upper right front control arm assembly 94 and the upper right rear control arm assembly 96 are: {(-126.83, 448.85, 379.21), (-77.01, 449.98, 371.02)}, {(148.15, 455.1, 333.97), (197.97, 456.23, 325.78)}. These fixing points are common fixing points for the engine compartment assembly 1, the front subframe assembly 4, and the front suspension 9. This effectively fixes the above assemblies into a rigid body structure.

[0074] As shown in Figures 5(a)-5(c), the front floor sill assembly 2 includes a general left sill assembly and a right sill assembly, and also includes a front floor body. The left sill assembly has four mounting points on the left side for fixing the battery power module 8, with the center point coordinates being: {(693.35, -778, -173), (978.35, -778, -173), (1698.35, -778, -173), (1873.35, -778, -173)}. The right sill assembly 8 has four mounting points on the right side for fixing the battery power module 8, with the center point coordinates being: {(693.35, -778, -173), (978.35, -778, -173), (1698.35, -778, -173)}. The coordinates are: {(693.35, 778, -173), (978.35, 778, -173), (1698.35, 778, -173), (1873.35, 778, -173)}. The front floor body is used to fix the four mounting points of the built-in longitudinal beam and the upper and lower housings of the battery power module 8. The center point coordinates are: {(1401.85, -430, -85), (1401.85, -170, -85), (1401.85, 170, -85), (1401.85, 430, -85)}.

[0075] As shown in Figures 6(a)-7(b), the rear floor assembly 3 includes a common left rear longitudinal beam assembly and a right rear longitudinal beam assembly. The lower surface of the left rear longitudinal beam assembly has three fixing holes. The middle hole is used to fix the left rear air spring assembly 115, with the center point coordinates being (3063.57, -468.06, 112.19). The other two holes are used to fix the two mounting points on the left side of the rear subframe with the suspension assembly, with the center point coordinates being {(2568, -570, -67), (3305, -510, 60.5)}. The left and right rear longitudinal beam assemblies are connected to the wheel arches as an integral structure. There are two reinforcing ribs on the inner surface of the wheel arch, and there are two holes at the reinforcing ribs for fixing the left rear shock absorber assembly 117. The center point coordinates are: {(2967.58, -581.74, 363.81), (3089.84, -607.47, 367.77)}.

[0076] Correspondingly, the lower surface of the right rear longitudinal beam assembly has three mounting holes. The middle hole is used to mount the right rear air spring assembly 116, 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 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 the reinforcing ribs for mounting the right rear shock absorber assembly 118, with center point coordinates of {(2967.58, 581.74, 363.81) and (3089.84, 607.47, 367.77)}. These mounting points are common to the rear floor assembly 3, the rear subframe with suspension assembly 5, and the rear suspension 10. This can effectively fix the above assemblies into a rigid body structure.

[0077] As shown in Figure 8(c), the front subframe assembly 4 is formed by welding an H-shaped welded body (long side) and a trapezoidal welded body. The short side of the H-shaped welded body has a triangular mounting plate and three mounting bolts on each side 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)}.

[0078] As shown in Figure 8(a), 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)}.

[0079] As shown in Figure 8(a), the triangular areas on both sides of the trapezoidal structure have two body mounting holes (right front longitudinal beam assembly 111 and left front longitudinal beam assembly 112), with center point coordinates as follows: {right (276, 414, -93.6), 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.

[0080] As shown in Figure 8(b), four mounting holes are symmetrically distributed in the triangular areas on both sides of the trapezoidal structure. 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 coordinates of the center points 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 three-in-one electric assembly 6, which combines the motor, motor controller, and gearbox, 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 4 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 three-in-one electric assembly 6 (motor, motor controller, and gearbox) and the front subframe assembly 4 remain unchanged.

[0081] As shown in Figures 8(b), 10(a), and 10(b), the trapezoidal structure has three mounting holes on its "upper bottom edge" for fixing to the front suspension soft pad assembly. The coordinates of the center points 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), and rear center (-7, -35, -143)}, thus realizing the installation of the front suspension soft pad assembly.

[0082] As shown in Figure 8(d), two inverted U-shaped (with flanged) stamped parts are welded to both sides of the H-shaped welded structure. Bolt mounting holes are opened on both sides of the two vertical plates of the U-shaped stamped parts, and a countersunk structure is stamped to improve surface fit accuracy and increase structural strength. The mounting hole coordinates of the right front U-shaped stamped part (used to fix the right front lower control arm assembly 98) are: {(-342.03, 437.96, -137.2), (-278.05, 389.43, -136.87)}, and the mounting hole coordinates of the left front U-shaped stamped part (used to fix the left front lower control arm assembly 97) 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 99) are: {(-36.63, 403.96, -129.88), (43.63, 406.34, -130.53)}, and the mounting hole coordinates of the left rear U-shaped stamping (used to fix the front lower control arm assembly 99) are: {(-36.63, -403.96, -129.88), (43.63, -406.34, -130.53)}.

[0083] As shown in Figures 9(a)-9(d), the rear subframe with suspension assembly 5 is die-cast from an H-shaped cast aluminum part. The four corners of the die-cast part have circular soft pads and are fixedly connected 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. The coordinates of the four corner mounting holes of the die-cast part are: {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 71 is opened in the middle of the front crossbeam of the H-shaped cast aluminum part, and the soft pad is built in to form an integral structure with the casting. There are raised U-shaped reinforcing ribs on both sides of the rear crossbeam of the H-shaped cast aluminum part. The middle of the reinforcing ribs has mounting holes for snapping and fixing the right suspension soft pad assembly-rear drive 72 and the left suspension soft pad assembly-rear drive 73. The coordinates of the two sets of mounting holes on the two reinforcing ribs are: {right outer (3298, 265, 36.5), right inner (3298, 185, 3...} 6.5), 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 front suspension soft pad assembly - rear drive 71, the coordinates of the mounting hole of the front suspension bracket - rear drive 71 are: (2723.5, 10, -141), there is a diagonal U-shaped reinforcing rib in the middle of the body mounting bushing and suspension soft pad assembly of the rear crossbeam of the H-shaped cast aluminum part, used to fix the right rear upper control arm assembly 96, left rear The upper control arm assembly 95 has two sets of mounting holes with coordinates as follows: {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 assembly... After connecting the right output shaft of the three-in-one electric assembly 7 (rear drive motor, motor controller, and gearbox), it passes through the round hole of the right longitudinal beam and is fixed to the right rear disc brake assembly. After connecting the left output shaft of the three-in-one electric assembly 7 (rear drive motor, motor controller, and gearbox), the left rear drive shaft assembly passes through the round hole of 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 103. The left and right sides are symmetrical, and the tie rod assembly 103 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)}.

[0084] 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 rear trailing arm assembly 102 and the left rear trailing arm assembly 101. 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)}. (The last sentence appears to be incomplete and possibly refers to a different location.) The lower part of the aluminum component, approximately one-third of the way from the rear with rounded square corners, has a reinforcing crossbeam. Both 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)}.

[0085] As shown in Figures 11(a) and 11(b), the three-in-one electric assembly 7 of rear drive motor, motor controller and gearbox, together with the front suspension bracket-rear drive 71, right suspension soft pad assembly-rear drive 72, left suspension soft pad assembly-rear drive 73 and mounting holes, constitute an assembly assembly which is matched and fixedly connected to the mounting holes of the rear subframe with suspension assembly 5.

[0086] As shown in Figures 11(a) and 11(b), the hole coordinates of the front suspension bracket-rear drive 71 are (2724, 10, -141), the hole coordinates of the right suspension pad assembly-rear drive 72 of the assembly are {right (3298.75, 264.9, 36.5), left (3298.75, 185.1, 36.5)}, and the hole coordinates of the left suspension pad assembly-rear drive 73 of the assembly are {right (3297.25, -185.1, 36.5), left (3297.25, -264.9, 36.5)}.

[0087] As shown in Figures 12(a)-12(c), the front suspension 9 includes the 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 the 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)}.

[0088] 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.

[0089] 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.

[0090] As shown in Figures 13(a)-13(c), the rear suspension 10 includes a left rear trailing arm assembly 101 {(2636.45, -524.93, -95.59), (2701.21, -462.43, -96.25)}, a right rear trailing arm assembly 102 {(2636.51, 525.01, -95.7), (2701.14, 462.38, -96.3)}, a tie rod assembly 103 (symmetrical and universal) {(2718.23, -431.36, -22.11), (2762.16, -424.64, -29.14)}, and a tie rod assembly 103. Pole assembly 103 (symmetrical 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)}, 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, -155.42), (3153.4, -276.43, -152.88)}, Rear Lower Control Arm Assembly 107 (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 109 (Symmetrical Universal) {(2819.18, 418.79, 77.99), (2866.82)} The following components are included: left rear air spring assembly 115 (3063.57, -468.06, 112.19), right rear air spring assembly 116 (3063.57, 468.06, 112.19), left rear shock absorber assembly 117 (2967.46, -582.32, 363.88, (3089.96, -606.89, 367.67), and right rear shock absorber assembly 118 (2967.47, 582.27, 363.91, (3089.95, 606.93, 367.71)). These components together form the rear suspension 10, which is fixedly connected to the rear floor assembly 3 and the rear subframe with suspension assembly 5 of the lower vehicle body.

[0091] The left rear shock absorber assembly 117, the right rear shock absorber assembly 118, the left rear air spring assembly 115, and the right rear air spring assembly 118 are fixed to the left rear longitudinal beam assembly and the right rear longitudinal beam assembly of the rear floor assembly 3. The fixing points are designed and assembled in a universal manner, and 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 types of vehicles.

[0092] The bushing assemblies in the following components are respectively installed and fixedly connected to the corresponding "U-shaped grooves" of the rear subframe with suspension assembly 5: left rear trailing arm assembly 101 (composed of rear trailing arm body and trailing arm bushing assembly), right rear trailing arm assembly 102 (composed of rear trailing arm body and trailing arm bushing assembly), tie rod assembly 103 (symmetrical and universal, composed of tie rod body and bushing assembly), rear upper control arm assembly 109 (symmetrical and universal, composed of rear control arm body and rear control arm bushing assembly), left rear upper control arm assembly 105 (composed of left rear upper control arm body, rear upper control arm inner bushing and rear upper control arm outer bushing assembly), right rear upper control arm assembly 106 (composed of right rear upper control arm body, rear upper control arm inner bushing and rear upper control arm outer bushing assembly), and rear lower control arm assembly 107 (symmetrical and universal, composed of rear lower control arm bushing assembly and rear lower control arm welded assembly).

[0093] As shown in Figure 14, the battery power module 8 is encapsulated by an external upper and lower housing. The lower housing has extruded hook 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)}.

[0094] The battery power module 8 has a reinforcing longitudinal beam in the middle. The reinforcing longitudinal beam can improve the modal and stiffness of the battery power module 8. The reinforcing longitudinal beam has four openings. By connecting the reinforcing longitudinal beam, the upper shell of the battery power module 8 and the front floor body, the lower body and the battery power module 8 can be transformed into a rigid body to improve side impact resistance and torsional stiffness. The reinforcing longitudinal beam and the surface of the upper shell inside the battery power module 8 have four circular holes. The center coordinates of the holes are: {(1401.85, -430, -85), (1401.85, -170, -85), (1401.85, 170, -85), (1401.85, 430, -85)}.

[0095] As shown in Figures 15(a)-15(d), the front brake assembly 11 includes a left front steering knuckle disc brake assembly and a right front steering knuckle disc brake assembly. The left front steering knuckle disc brake assembly includes a left upper front control arm assembly with fixing point 93 (8.26, -674.09, 370.22) and a left upper rear control arm assembly with fixing point 95 (76.45, -678.39, 3...). 70.22), left front lower control arm assembly 97 fixed points {(-74.51, -741.14, -158.96), (-74.58, -743.38, -186.87)}, front lower control arm assembly 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.

[0096] The rear brake assembly 12 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 109 with fixing points {(2848.67, -752.48, 97.39), (2917.14, -744.24, 94.51)}, and a left rear upper control arm assembly 105 with fixing points {(2966.15, -728.35, 98.12), (2997.41, -747.31, 99.72)}, and a rear lower... Control arm assembly 107 fixed points {(2985.17, -735.77, -153.49), (3043.85, -748.12, -151.59)}, left rear trailing arm assembly 101 fixed points {(2876.43, -795.83, -185.62), (2902.64, -770.24, -185.87)}, tie rod assembly 103 fixed points {(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)}.

[0097] 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, wherein, The lower body includes 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 suspension assembly (5), and the suspension includes a front suspension (9) and a rear suspension (10). The left front longitudinal beam assembly (112) and right front longitudinal beam assembly (111), which are common components in the engine compartment assembly (1), share the same mounting hole coordinates as the front subframe assembly (4). The left and right door sill assemblies, which are common components in the front floor door sill assembly (2), share the same mounting hole coordinates with the battery power module (8). The left and right rear longitudinal beam assemblies, which are common components in the rear floor assembly (3), share the same mounting hole coordinates with the corresponding rear subframe with suspension assembly (5). The mounting hole coordinates of the front suspension (9) and the front subframe assembly (4) are the same, and the mounting hole coordinates of the rear suspension (10) and the rear subframe with suspension assembly (5) are the same, so as to ensure that the assembly method between the lower body, subframe and suspension is consistent.

2. The universal pure electric vehicle platform lower body, subframe, and suspension according to claim 1, wherein, The mounting point coordinates on the left front longitudinal beam assembly (112) and the right front longitudinal beam assembly (111) are the same, and are used to fix them to the left and right sides of the front subframe assembly (4), respectively.

3. The universal pure electric vehicle platform lower body, subframe, and suspension according to claim 1, wherein, The left front longitudinal beam assembly (112) and the right front longitudinal beam assembly (111) are respectively connected to the universal left front shock absorber mount (114) and right front shock absorber mount (113) on their rear sides. The left front shock absorber mount (114) and the left front air spring strut assembly (91) of the front suspension (9) are respectively provided with universal mounting point coordinates for mutual installation. The right front shock absorber mount (113) and the right front air spring strut assembly (92) of the front suspension (9) 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, wherein, The shock absorber mount and the front control arm assembly of the front suspension (9) are provided with universal mounting point coordinates that are mutually installed.

5. The universal pure electric vehicle platform lower body, subframe, and suspension according to claim 1, wherein, The front floor sill assembly (2) also includes a front floor body. The left sill assembly and the right sill assembly are respectively fixed to the left and right sides of the battery power module (8). The front floor body and the built-in longitudinal beams, upper housing and lower housing of the battery power module (8) are provided with corresponding universal installation point coordinates.

6. The universal pure electric vehicle platform lower body, subframe, and suspension according to claim 1, wherein, The left rear longitudinal beam assembly and the right rear longitudinal beam assembly each have three fixing holes. The middle hole is used to fix the left rear air spring assembly and the right rear air spring assembly of the rear suspension (10), and the corresponding mounting point coordinates are universal. The other fixing holes fix the rear subframe with suspension assembly (5) 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, wherein, The front subframe assembly (4) is formed by welding an H-shaped welded body and a trapezoidal welded body together to form a welded structure body. The triangular areas on both sides of the H-shaped welded body and the trapezoidal welded body are connected to the corresponding mounting holes of the left front longitudinal beam assembly (112) and the right front longitudinal beam assembly (111).

8. The universal pure electric vehicle platform lower body, subframe, and suspension according to claim 7, wherein, Two inverted U-shaped stamped parts are welded to both sides of the H-shaped welded body, which are used to fix and connect with the front lower control arm assembly (99) of the front suspension (9), and the installation point coordinates are universal.

9. The universal pure electric vehicle platform lower body, subframe, and suspension according to claim 1, wherein, The rear subframe with suspension assembly (5) is die-cast from an H-shaped cast aluminum part. The four corners of the die-cast part have round soft pads and are connected to the corresponding mounting holes of the left rear longitudinal beam assembly and the right rear longitudinal beam assembly of the vehicle body by bolts.

10. The universal pure electric vehicle platform lower body, subframe, and suspension according to claim 1, wherein, The rear subframe with suspension assembly (5) 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 mounting points corresponding to the rear suspension (10), and the coordinates of the mounting points are universal.

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