Universal pure electric vehicle platform lower vehicle body, auxiliary frame and suspension

Abstract

The invention relates to the technical field of electric vehicles, and discloses a universal pure electric vehicle platform lower vehicle body, an auxiliary frame and a suspension, and the lower vehicle body comprises an engine compartment assembly, a front floor threshold assembly and a rear floor assembly; a left front longitudinal beam assembly and a right front longitudinal beam assembly which are used as universal parts in the engine compartment assembly are universal with point coordinates of mounting holes corresponding to the front auxiliary frame; a left doorsill assembly and a right doorsill assembly, which are used as universal parts, in the front floor doorsill assembly are universal with point coordinates of mounting holes corresponding to the battery power module; in the rear floor assembly, a left rear longitudinal beam assembly and a right rear longitudinal beam assembly which are used as universal parts are universal with the point coordinates of the corresponding mounting holes of the rear auxiliary frame with the suspension assembly; point coordinates of mounting holes corresponding to the front suspension and the front auxiliary frame are universal; the point coordinates of the mounting holes of the rear suspension and the rear auxiliary frame with the suspension assembly are universal, so that the mutual assembly modes of the lower vehicle body, the auxiliary frame and the suspension are kept consistent.

Description

Technical Field

[0001] The present invention relates to the technical field of electric vehicles, and in particular to a universal lower body, a subframe and a suspension of a pure electric vehicle platform. Background Art

[0002] The current sales share of new energy vehicles in the market continues to increase. The addition of new technologies such as smart chassis, 400V-1000V high-voltage architecture power system, smart cockpit, and autonomous driving has made cars more and more intelligent. In order to adapt to smart cars and related smart products, traditional car companies and new brands have developed new platforms to meet the needs of smarter cars. For example, the NT2 platform launched by NIO has advantages in on-board smart hardware, vehicle computing platform, operating system, smart algorithms and smart applications. At the same time, it can adapt to the universal needs of many different models such as ET7, ES7, ET5, and the product strength will be greatly enhanced.

[0003] There are also Geely's vast architecture, which is a pure electric original architecture with user travel experience as the core. It builds a three-in-one three-dimensional layout with hardware layer, system layer and ecological layer, which can achieve coverage from A-class cars to E-class cars, and can meet the needs of sedans, SUVs, MPVs, small city cars, sports cars, pickup trucks and future travel vehicles. However, for the lower body, subframe and suspension of the vehicle, it is difficult to be compatible with the co-line assembly and production of all electric vehicles on the same platform; for example, the tuning parts of the car, basically every model needs to be redesigned and tuned as long as the weight changes, and different installation points and installation methods cannot achieve the co-line assembly and production of electric vehicles; differentiated parts and installation methods increase the number and types of platform parts, and also increase the differentiated development and management costs. Summary of the invention

[0004] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a universal pure electric vehicle platform lower body, subframe and suspension, so as to maximize the guarantee that the installation points and installation methods remain unchanged, realize co-line assembly and production, and solve the problem that differentiated components and installation methods increase the number and types of platform parts and increase differentiated development costs.

[0005] In order to achieve the above object, the present invention is implemented through the following technical solutions:

[0006] A universal lower body, subframe and suspension of a pure electric vehicle platform, including a lower body including 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 universal parts in the engine compartment assembly have universal mounting hole point coordinates corresponding to the front subframe; the left sill assembly and the right sill assembly as universal parts in the front floor sill assembly have universal mounting hole point coordinates corresponding to the battery power module; the left rear longitudinal beam assembly and the right rear longitudinal beam assembly as universal parts in the rear floor assembly have universal mounting hole point coordinates corresponding to the rear subframe with suspension assembly; the front suspension has universal mounting hole point coordinates corresponding to the front subframe; the rear suspension has universal mounting hole point coordinates corresponding to the rear subframe with suspension assembly, so as to achieve consistency in the assembly methods of the lower body, the subframe and the suspension.

[0007] As a further implementation, the installation point coordinates on the left front longitudinal beam assembly and the right front longitudinal beam assembly are common, and are used to be fixedly connected to the left and right sides of the front subframe respectively.

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

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

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

[0011] As a further implementation method, 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 installation 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 installation point coordinates are universal.

[0012] As a further implementation method, the front subframe is formed by welding an H-shaped structure welded body and a trapezoidal structure 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 structure welded body and the trapezoidal structure welded body.

[0013] As a further implementation method, two inverted U-shaped stamping parts are welded on both sides of the H-shaped structural welded body, which are used to be fixedly connected to the front lower control arm assembly of the front suspension, and the installation point coordinates are universal.

[0014] As a further implementation method, the rear subframe with suspension assembly is die-cast from an H-shaped aluminum casting, and the four corners of the die-casting have circular pads that are fixed to the corresponding mounting holes of the left rear longitudinal beam assembly and the right rear longitudinal beam assembly of the vehicle body through bolts.

[0015] As a further implementation method, a universal mounting point corresponding to the suspension cushion assembly is provided on the rear subframe with suspension assembly, and an oblique U-shaped reinforcement rib is provided between the body mounting bushing of the H-shaped cast aluminum rear cross beam and the suspension cushion assembly for fixing the mounting point corresponding to the rear suspension, and the mounting point coordinates are universal.

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

[0017] 1. The present invention adopts the right front longitudinal beam assembly and the left front longitudinal beam assembly to be universal and the fixed hole coordinates and sizes are the same, so that the front sub-frame assembly can be universal and the assembly method can be consistent; the left rear longitudinal beam assembly and the right rear longitudinal beam assembly can be universal and the fixed hole coordinates and sizes are the same, so that the rear sub-frame with suspension assembly can be universal and the assembly method can be consistent; the connecting rod system and structure of the front suspension can be universalized by sharing the associated fixing points of the engine compartment and the front sub-frame; the connecting rod system and structure of the rear suspension can be universalized by sharing the associated fixing points of the rear floor assembly and the rear sub-frame with suspension assembly, thereby ensuring that the installation points and installation methods remain unchanged to the greatest extent, realizing co-linear assembly and production, and solving the problem that differentiated parts and installation methods increase the number and types of platform parts and increase differentiated development costs.

[0018] 2. The present invention makes the left door sill assembly and the right door sill assembly universal and the fixing hole coordinates and sizes the same, so that the power battery assembly can be universal and the assembly method can be consistent; the universal electric drive three-in-one assembly and (front suspension cushion assembly, right suspension cushion assembly, left suspension cushion assembly) have adjustable cushion stiffness, the same fixing method, hole position and structure, and the composed assembly can be universally assembled with the front subframe assembly. The universal rear-drive electric drive three-in-one assembly and (front suspension bracket-rear drive, right suspension cushion assembly-rear drive, left suspension cushion assembly-rear drive) have adjustable cushion stiffness, the same fixing method, hole position and structure, and the composed assembly can be universally assembled with the rear subframe welding assembly.

[0019] 3. The present invention has universal design and assembly of fixed points between corresponding structures, and the stiffness of the suspension is adjusted only by adjusting the air pressure through calibration parameters, thus meeting the requirements of different types of vehicle models for suspension stiffness. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

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

[0022] FIG1( b ) is a front view of the lower vehicle body, subframe and suspension of the present invention;

[0023] FIG1( c ) is a bottom view of the lower vehicle body, subframe and suspension of the present invention;

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

[0025] FIG3( a ) is a schematic diagram of the right front longitudinal beam assembly of the present invention with the front subframe assembly (right side) mounting points;

[0026] FIG3( b ) is a schematic diagram of the left front longitudinal beam assembly with the front subframe assembly (left side) mounting points of the present invention;

[0027] FIG3( c ) is a schematic diagram of the left front shock absorber seat with the left front air spring strut assembly fixing point of the present invention;

[0028] FIG3( d ) is a schematic diagram of the left front shock absorber seat with the control arm assembly fixing point of the present invention;

[0029] FIG4( a ) is a schematic diagram of the right front shock absorber seat with the right front air spring strut assembly fixing point of the present invention;

[0030] FIG4( b ) is a schematic diagram of the right front shock absorber seat with the control arm assembly fixing point of the present invention;

[0031] FIG5( a ) is a schematic diagram of the left side door sill assembly of the present invention with the left side fixing point of the battery power module;

[0032] FIG5( b ) is a schematic diagram of the right side sill assembly of the present invention with the right fixing point of the battery power module;

[0033] FIG5( c ) is a schematic diagram of the front floor body of the present invention with the longitudinal beam fixing points of the battery power module;

[0034] FIG6( a ) is a schematic diagram of the structure of the left rear longitudinal beam assembly with a wheel cover according to the present invention;

[0035] FIG6( b ) is a schematic diagram of the right rear longitudinal beam assembly with a wheel cover structure of the present invention;

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

[0037] FIG7( b ) is a schematic diagram of the right rear longitudinal beam assembly of the present invention;

[0038] FIG8( a ) is a schematic diagram of the overall structure of the front subframe assembly of the present invention;

[0039] FIG8( b ) is a schematic diagram of the front subframe assembly of the present invention with the fixing points of the suspension cushion assembly;

[0040] FIG8( c ) is a schematic diagram of the front subframe assembly of the present invention with the lower anti-collision beam assembly mounting hole;

[0041] FIG8( d ) is a schematic diagram of the front subframe assembly with the control arm assembly fixing points of the present invention;

[0042] FIG9( a ) is a schematic diagram of the fixing hole positions of the rear subframe with the suspension assembly and the left and right longitudinal beam assemblies of the present invention;

[0043] FIG9( b ) is a top view of the rear subframe with suspension assembly of the present invention;

[0044] FIG9( c ) is a top view of the rear subframe with suspension assembly of the present invention;

[0045] FIG9( d ) is a top view of the rear subframe with suspension assembly of the present invention;

[0046] FIG. 10( a ) is a diagram showing the installation positions of the three-in-one electric assembly of the motor, controller, and reduction gearbox and the suspension cushion assembly of the present invention;

[0047] FIG10( b ) is a diagram showing the installation positions of the three-in-one electric assembly of the motor, controller, and reduction gearbox and the suspension cushion assembly of the present invention;

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

[0049] FIG11( b ) is a schematic diagram of a three-in-one electric assembly of a rear drive motor, a controller, and a reduction gearbox according to the present invention;

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

[0051] FIG12( b ) is a schematic diagram of the front suspension structure of the present invention;

[0052] FIG12( c ) is a schematic diagram of the front suspension structure of the present invention;

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

[0054] FIG13( b ) is a schematic diagram of the rear suspension structure of the present invention;

[0055] FIG13( c ) is a schematic diagram of the rear suspension structure of the present invention;

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

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

[0058] FIG15( b ) is a schematic diagram of a right front steering knuckle with a disc brake assembly at the front suspension of the present invention;

[0059] FIG15( 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] In the figure: the distances or sizes between parts are exaggerated to show the positions of various parts, and the schematic diagram is for reference only.

[0062] Among them: 1. Engine compartment assembly; 2. Front floor sill assembly, 3. Rear floor assembly; 4. Front subframe assembly, 5. Rear subframe with suspension assembly; 6. Three-in-one electric assembly of motor, motor controller and gearbox, 7. Three-in-one electric assembly 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 suspension system,

[0063] 110. Front end structure assembly, 111 right front longitudinal beam assembly, 112. left front longitudinal beam assembly, 113. right front shock absorber seat, 114. left front shock absorber seat; 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 DESCRIPTION

[0064] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0065] Embodiment 1

[0066] In a typical embodiment of the present invention, reference is made to Figure 1(a)-Figure 15(d) As shown, a universal pure electric vehicle platform lower body, subframe and suspension, 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 suspension assembly 5, and the suspension includes a front suspension 9 and a rear suspension 10. It also includes a motor, a motor controller, a reduction gearbox three-in-one electric assembly 6, a rear drive motor, a motor controller, a reduction gearbox three-in-one electric assembly 7, a battery power module 8, a front brake assembly 11, a rear brake assembly 12, and a powertrain suspension system 13.

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

[0068] like Figure 3(a)-Figure 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 sub-frame assembly 4, and the center point coordinates are: {(-377, -477, 30), (-77, -425, 64.5), (276, -414, -93.6)}, and the right front longitudinal beam assembly 111 is used to fix the three mounting points on the right side of the front sub-frame assembly 4, and the center point coordinates are: {(-377, 477, 30), (-77, 425, 64.5), (276, 414, -93.6)}.

[0069] like Figure 3(c)-Figure 4(b) As shown, the middle of the left front shock absorber seat 114 and the right front shock absorber seat 113 is a casting with a tower package structure, in the middle of which there is a circular through hole, and three waist-shaped holes are evenly distributed around the circular through hole, which are used to fix the left front air spring slide assembly, and 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 fix the right front air spring slide assembly 92, and 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 seats are a hollow structure similar to a hexahedron, in which the lower bottom surface and the front surface are removed to become a four-sided closed structure. There are two inverted U-shaped groove reinforcement rib structures and two groups of circular holes at the back of the tetrahedron, which are used to fix the left upper front control arm assembly and the left upper rear control arm assembly respectively. The center point coordinates of the two groups of circular holes of the inverted U-shaped groove reinforcement rib 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)}; and the center point coordinates of the two sets of circular holes for fixing the upper right front control arm assembly and the upper right rear control arm assembly, the inverted U-shaped groove reinforcement ribs 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)}. The above fixing points are the universal fixing points of the engine compartment assembly, the front subframe assembly, and the front suspension. The above assemblies can be effectively fixed into a rigid structure.

[0071] like Figure 5(a)-Figure 5(c) As shown, the front floor sill assembly structure includes a universal left sill assembly and a right sill assembly, and also includes a front floor body. The left sill assembly 9 is provided with four mounting points on the left side for fixing the battery power module, and the center point coordinates are: {(693.35, -778, -173), (978.35, -778, -173), (1698.35, -778, -173), (1873.35, -778, -173)}, and the right sill assembly 10 is provided with four mounting points on the right side for fixing the battery power module, and the center point coordinates are: {( The front floor body is used to fix the built-in longitudinal beam of the battery power module and the four installation points of the upper shell and the lower shell. The center point coordinates are: {(1401.85, -430, -85), (1401.85, -170, -85), (1401.85, 170, -85), (1401.85, 430, -85)}.

[0072] like Figure 6(a)-Figure 7(b)The rear floor assembly structure includes a universal 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, and the center point coordinates are: (3063.57, -468.06, 112.19). The other two holes are used to fix the two left mounting points of the rear subframe with suspension assembly, and the center point coordinates are: {(2568, -570, -67), (3305, -510, 60.5)}. The left rear longitudinal beam assembly and the right rear longitudinal beam assembly are connected to the wheel cover as an integrated structure. There are two reinforcing ribs on the inner surface of the wheel cover, and there are two holes at the reinforcing ribs for fixing the left rear shock absorber assembly, and the center point coordinates are: {(2967.58, -581.74, 363.81), (3089.84, -607.47, 367.77)}.

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

[0074] like Figure 8(a)-Figure 8(d) The front subframe assembly 4 is formed by welding an H-shaped structural welded body (long side) and a trapezoidal structural welded body to form a welded structural body. A triangular mounting plate and three mounting bolts are symmetrically arranged on both sides of the short side of the H-shaped structural welded body to fix 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. There are mounting holes for the right front longitudinal beam assembly 111 and the left front longitudinal beam assembly 112 inside the brackets. The center point coordinates are: {right front (-377, 477, 30), right rear (-77, 425, 64.5), left front (-377, -477, 30), left rear (-77, -425, 64.5)}.

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

[0076] There are four mounting holes symmetrically distributed in the triangular areas on both sides of the trapezoidal structure. The right side fixes the right suspension cushion assembly and the left side fixes the left suspension cushion 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 of the motor, motor controller and reduction gearbox and the front suspension cushion assembly, the right suspension cushion assembly and the left suspension cushion assembly form an assembly assembly, which is matched and fixedly connected with the mounting holes of the front subframe assembly. The coordinates of the right suspension cushion assembly holes of the assembly are: {left rear (300.5, 224.25, -90), right rear (285.5, 333, -90), right front (180, 362.8, -90), left front (165, 285, -90)}, and the coordinates of the left suspension cushion assembly holes of the assembly are: {right rear (300.5, -224.25, -90), left rear (285.5, -333, -90), left front (180, -362.8, -90), right front (165, -285, -90)}. This ensures that the installation method and installation point of the motor, motor controller, and reduction gearbox three-in-one electric assembly 6 and the front subframe assembly remain unchanged.

[0077] There are three mounting holes on the "upper bottom edge" of the trapezoidal structure for fixing the front suspension cushion assembly. The coordinates of the center points of the holes are {(-125, 37, -143), (-7, -35, -90), (-115, -99, -143). Correspondingly, the coordinates of the holes of the front suspension cushion 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 cushion assembly.

[0078] Two inverted U-shaped (with flanged) stampings are welded on both sides of the H-shaped structural welded body. Bolt mounting holes are opened on both sides of the two vertical plates of the U-shaped stamping, and a countersunk structure is stamped to improve the surface matching accuracy and increase the structural strength. The mounting hole coordinates of the right front U-shaped stamping (used to fix the right front lower control arm assembly): {(-342.03, 437.96, -137.2), (-278.05, 389.43, -136.87)}, the mounting hole coordinates of the left front U-shaped stamping (used to fix the left front lower control arm assembly): {(-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): {(-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): {(-36.63, -403.96, -129.88), (43.63, -406.34, -130.53)}.

[0079] like Figure 9(a)-Figure 9(d)The rear subframe with suspension assembly is die-cast from an H-shaped aluminum casting. The four corners of the die-casting are provided with circular cushions and are fixed to the lower body through bolts with the left rear longitudinal beam assembly and the right rear longitudinal beam assembly of the vehicle body. ① The coordinates of the four corner mounting holes of the die-casting 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 front suspension bracket-rear drive cushion assembly hole is opened in the middle of the front crossbeam of the H-shaped aluminum casting, and a built-in cushion is formed into an integrated structure with the casting. There are raised U-shaped reinforcement ribs on both sides of the rear crossbeam of the H-shaped aluminum casting. There are mounting holes in the middle of the reinforcement ribs for clamping and fixing the right suspension cushion assembly-rear drive and the left suspension cushion assembly-rear drive. The coordinates of the two groups of mounting holes of the reinforcement ribs on both sides are: {right outer (3298, 265, 36.5), right inner (3298, 185, 36 .5), left outer (3298, -265, 36.5), left inner (3298, -185, 36.5)}, in the middle of the front crossbeam of the H-shaped aluminum casting, there is a round hole with a rear-drive front suspension cushion assembly, and the coordinates of the mounting hole of the front suspension bracket-rear drive are: (2723.5, 10, -141), in the middle of the body mounting bushing and the suspension cushion assembly of the rear crossbeam of the H-shaped aluminum casting, there is an oblique U-shaped reinforcement rib for fixing the right rear upper control arm assembly and the left rear upper control arm assembly. The coordinates of the two sets of mounting holes of the brake arm assembly are: {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 longitudinal beams on both sides of the H-shaped aluminum casting are semicircular arc-shaped structural parts with large circular holes, and the right rear drive shaft The assembly is connected to the right side output shaft of the three-in-one electric assembly of the rear drive motor, motor controller and reduction gearbox, and then passes through the round hole of the right side longitudinal beam to be fixed to the right rear disc brake assembly. The left rear drive shaft assembly is connected to the left side output shaft of the three-in-one electric assembly of the rear drive motor, motor controller and reduction gearbox, and then passes through the round hole of the left side longitudinal beam to be fixed to the left rear disc brake assembly. A U-shaped groove and a group of waist-shaped holes are opened at the front end root 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)}. There are U-shaped grooves and a set of holes for fixing the rear upper control arm assembly symmetrically on the left and right sides at the high points of the circular holes on the longitudinal beams on both sides of the H-shaped aluminum casting, and the rear upper control arm assembly 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 opened on the outer side where the front cross beam overlaps the vertical beams on both sides. The vertical surface of the U-shaped groove structure has two mounting holes for fixing the right rear trailing arm assembly and the left rear trailing arm assembly. 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 aluminum casting There is a reinforcing crossbeam at about 1 / 3 of the rear of the rounded square. Both ends of the crossbeam are U-shaped grooves and have 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 Figure 11(a)-Figure 11(b) The rear drive motor, motor controller, reduction gearbox three-in-one electric assembly 7 and the front suspension bracket-rear drive 71, right suspension cushion assembly-rear drive 72, left suspension cushion assembly-rear drive 73 assembly and mounting holes constitute an assembly assembly which is matched and fixedly connected with the mounting holes of the rear subframe with suspension assembly 5.

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

[0083] like Figure 12(a)-Figure 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)}, 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 together constitute the front suspension, which is fixedly connected to the engine compartment assembly and the front subframe assembly of the lower body. 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 seat 114 and the right front shock absorber seat 113 of the engine compartment assembly 1. The fixed points are universally designed and assembled. The stiffness of the suspension is adjusted only by adjusting the air pressure through calibration parameters, meeting the requirements of different types of vehicle models for suspension stiffness.

[0085] The bushings in the left front lower control arm assembly 97 (consisting of a left front lower control arm body and a front lower control arm bushing), the right front lower control arm assembly 98 (consisting of a right front lower control arm body and a front lower control arm bushing), and the front lower control arm assembly 99 (symmetrical and universal, consisting of a front lower control arm body and a front lower control arm bushing) are 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, respectively.

[0086] like Figure 13(a)-Figure 13(c), the rear suspension assembly 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)}, a 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 1, 75.99)}, left rear air spring assembly 111 (3063.57, -468.06, 112.19), right rear air spring assembly 112 (3063.57, 468.06, 112.19), left rear shock absorber assembly 113 {(2967.46, -582.32, 363.88), (3089.96, -606.89, 367.67)}, right rear shock absorber assembly 114 {(2967.47, 582.27, 363.91), (3089.95, 606.93, 367.71)}. The above together constitute the rear suspension, which is fixedly connected to the rear floor assembly of the lower body and the rear subframe with suspension assembly.

[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 rear longitudinal beam assembly and the right rear longitudinal beam assembly of the rear floor assembly 112 are fixed, and the fixing points are designed and assembled in a universal manner. The stiffness of the suspension is adjusted by adjusting the air pressure through calibration parameters to meet the requirements of different types of vehicle models for suspension stiffness.

[0088] Among them, the left rear trailing arm assembly (consisting of a rear trailing arm body and a trailing arm bushing assembly), the right rear trailing arm assembly (consisting of a rear trailing arm body and a trailing arm bushing assembly), the tie rod assembly (symmetrical and universal, consisting of a tie rod body and a bushing assembly), the rear upper control arm assembly (symmetrical and universal, consisting of a rear control arm body and a rear control arm bushing assembly), the left rear upper control arm assembly (consisting of a left rear upper control arm body, a rear upper control arm inner bushing and a rear upper control arm outer bushing assembly), the right rear upper control arm assembly (consisting of a right rear upper control arm body, a rear upper control arm inner bushing and a rear upper control arm outer bushing assembly), and the bushing assemblies in the rear lower control arm assembly (symmetrical and universal, consisting of a rear lower control arm bushing assembly and a rear lower control arm welding assembly) are respectively installed and fixedly connected with the corresponding "U-shaped grooves" of the rear subframe.

[0089] like Fig.14 As shown, the battery power module is encapsulated by an external upper shell and a lower shell, wherein the two sides of the lower shell are provided with a hanging structure by extrusion molding, and the surfaces of the hanging structures on both sides are provided with 4 circular holes, which are respectively used to fix the left and right sill assemblies of the front floor sill assembly. The center coordinates of the left hole of the hanging structure 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] There is a reinforced longitudinal beam in the middle of the battery power module. The longitudinal beam can improve the mode and stiffness of the battery module. The longitudinal beam has four openings. By hanging the longitudinal beam, the upper shell of the battery module and the front floor body, the lower body and the battery module can be turned into a rigid body to improve the side impact resistance and torsional stiffness. There are four circular holes in the longitudinal beam and the upper shell surface 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] like Figure 15(a)-Figure 15(d) , Front brake assembly: includes the left front steering knuckle with disc brake assembly and the right front steering knuckle with disc brake assembly. The left front steering knuckle with disc brake assembly includes the left upper front control arm assembly 93 fixed points (8.26, -674.09, 370.22), the left upper rear control arm assembly 95 fixed points (76.45, -678.39, 370.22), the left front lower control arm assembly 97 fixed points {(-74.51, -741.14, -158.96), (-74.58, -743.38, -186.87)}, the 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 the right upper front control arm assembly 94 fixing point (8.26, 674.09, 370.22), the right upper rear control arm assembly 96 fixing point (76.45, 678.39, 370.22), the right front lower control arm assembly 98 fixing point {(-74.51, 741.14, -158.96), (-74.34, 743.25, -191.88)}, and the front lower control arm assembly 99 fixing point {(-6.41, 749.07, -191.65), (-6.58, 746.92, -158.87)}.

[0092] The rear brake assembly includes a left rear disc brake assembly and a right rear disc brake assembly, wherein the left rear disc brake assembly includes a rear upper control arm assembly 109 fixing points {(2848.67, -752.48, 97.39), (2917.14, -744.24, 94.51)}, a left rear upper control arm assembly 105 fixing points {(2966.15, -728.35, 98.12), (2997.41, -747.31, 99.72)}, and a rear lower control The fixed points of arm assembly 107 are {(2985.17, -735.77, -153.49), (3043.85, -748.12, -151.59)}, the fixed points of left rear trailing arm assembly 101 are {(2876.43, -795.83, -185.62), (2902.64, -770.24, -185.87)}, and the fixed points of tie rod assembly 103 are {(2748.29, -707.38, -22.64), (2815. 65, -696.84, -33.42)}, wherein 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)}, 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 points {(2876.43, 795.83, -185.62), (2902.64, 770.43, -185.87)}, tie rod assembly 103 fixing points {(2748.29, 707.38, -22.64), (2815.65, 696.84, -33.42)}.

[0093] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A universal pure electric vehicle platform lower body, subframe and suspension, characterized in that: The lower body includes 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 universal parts in the engine compartment assembly have universal mounting hole point coordinates corresponding to the front subframe; the left sill assembly and the right sill assembly as universal parts in the front floor sill assembly have universal mounting hole point coordinates corresponding to the battery power module; the left rear longitudinal beam assembly and the right rear longitudinal beam assembly as universal parts in the rear floor assembly have universal mounting hole point coordinates corresponding to the rear subframe with suspension assembly; the front suspension has universal mounting hole point coordinates corresponding to the front subframe; the rear suspension has universal mounting hole point coordinates corresponding to the rear subframe with suspension assembly, so as to achieve consistency in the assembly methods of the lower body and the subframe and suspension.

2. The universal lower body, subframe and suspension of a pure electric vehicle platform according to claim 1 is characterized in that: The installation point coordinates on the left front longitudinal beam assembly and the right front longitudinal beam assembly are common, and are used to be fixedly connected to the left side and the right side of the front subframe respectively.

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

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

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

6. The universal lower body, subframe and suspension of a pure electric vehicle platform according to claim 1 is characterized in that: 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 installation 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 installation point coordinates are universal.

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

8. The universal lower body, subframe and suspension of a pure electric vehicle platform according to claim 7 is characterized in that: Two inverted U-shaped stamping parts are respectively welded on both sides of the H-shaped structural welded body, which are used for fixed connection with the front lower control arm assembly of the front suspension, and the installation point coordinates are universal.

9. The universal lower body, subframe and suspension of a pure electric vehicle platform according to claim 1, characterized in that: The rear subframe with suspension assembly is formed by die-casting an H-shaped aluminum casting, and the four corners of the die-casting have circular cushions which are respectively connected to the corresponding mounting holes of the left rear longitudinal beam assembly and the right rear longitudinal beam assembly of the vehicle body through bolts.

10. The universal lower body, subframe and suspension of a pure electric vehicle platform according to claim 1, characterized in that: The rear subframe with suspension assembly is provided with universal mounting points corresponding to the suspension cushion assembly, and there is an oblique U-shaped reinforcement rib between the body mounting bushing of the H-shaped cast aluminum rear cross beam and the suspension cushion assembly for fixing the mounting points corresponding to the rear suspension, and the mounting point coordinates are universal.

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