Passenger car chassis

Abstract

The utility model provides a passenger car chassis which comprises a drive axle module and is characterized in that the drive axle module comprises a drive front vertical sheet structure arranged at the front end, and the drive front vertical sheet structure comprises at least one drive multi-interface casting. The driving multi-interface casting comprises at least one connecting end used for being connected with a thrust rod or a stabilizer bar. The integrated design thought of parts is fully utilized, structural parts and functional parts are integrated, a complex tailor-welded part is replaced by an integrated part, the strength of the whole automobile is improved through the integrated casting, the product reliability is improved, the production cost is reduced, and the number of the parts is reduced.

Description

Technical Field

[0001] The utility model belongs to the fields of buses, passenger cars, etc., and particularly relates to a bus underframe. Background Art

[0002] Currently, the chassis of vehicles such as highway tour buses utilize a traditional three-section structure. For example, patent CN105857398A describes a universal pure electric bus chassis structure. This structure utilizes a large number of rectangular tube welded trusses, resulting in insufficient integrated design, numerous welded structures, complex production processes, and high manufacturing costs. This structure exhibits poor universalization, a wide variety of structural types, high tooling investment, low vehicle switching efficiency, and a long new product development cycle. Furthermore, when laying the chassis wiring harness for current buses, it is necessary to thread it from beneath the aisle frame. Because the frame structure is manufactured using welding, wiring harness installation is inconvenient, installation efficiency is low, and the labor intensity is high, resulting in low efficiency. Utility Model Content

[0003] The utility model provides a passenger car underframe.

[0004] The purpose of the present utility model is achieved in the following manner: a passenger car underframe, including a drive axle module, characterized in that: the drive axle module includes a drive front vertical plate structure arranged at the front end, the drive front vertical plate structure includes at least one drive multi-interface casting, and the drive multi-interface casting includes at least one connection end for connecting a thrust rod or a stabilizer rod.

[0005] The drive front vertical plate structure includes two drive multi-interface castings arranged side by side; each drive multi-interface casting includes an upper connecting end located at the upper end for connecting to the thrust rod on the corresponding drive axle, and a lower connecting end located at the lower end for connecting to the lower thrust rod on the corresponding drive axle; the two drive multi-interface castings respectively include a stabilizer bar connecting end connected to the same drive axle stabilizer bar.

[0006] The driving front vertical plate structure includes a left connecting rod arranged on the left side of the upper end of the left driving multi-interface casting, and a right connecting rod arranged on the right side of the upper end of the right driving multi-interface casting, and respective shock absorber supports and airbag supports are welded on the left connecting rod and the right connecting rod respectively; an upper rod is welded between the upper ends of the two driving multi-interface castings; the center lines of the left connecting rod, the right connecting rod and the upper rod coincide; the driving axle module also includes a driving rear vertical plate structure arranged at the rear end, a driving left vertical plate structure and a driving right vertical plate structure connected to the driving front vertical plate structure and the driving rear vertical plate structure; the driving rear vertical plate structure is a frame structure, on which two shock absorber supports and two airbag supports are respectively arranged at the positions of the shock absorbers and airbags at the rear of the driving axle.

[0007] The underframe also includes a steering axle module, which includes a steering rear vertical plate structure arranged at the rear end; the steering rear vertical plate structure includes two steering multi-interface castings arranged side by side at the lower end and two steering mounting castings arranged side by side above the steering multi-interface castings; each of the steering multi-interface castings includes a second stabilizer bar connecting end for connecting to the steering axle stabilizer bar and a second lower connecting end for connecting to the lower thrust rod of the steering axle; each of the steering mounting castings includes a second upper connecting end for connecting to the upper thrust rod of the steering axle.

[0008] A detachable movable beam is arranged between the two steering multi-interface castings; the steering rear vertical plate structure also includes an upward left steering truss welded on the left side of the left multi-interface casting and an upward right steering truss welded on the right side of the right multi-interface casting; corresponding steering mounting castings are distributed and welded on the left steering truss and the right steering truss; the steering axle module also includes a steering left vertical plate structure and a steering right vertical plate structure; the lower end of the steering left vertical plate structure is welded to the upper end of the steering multi-interface casting, and the rear end is welded to the left steering truss; the lower end of the steering right vertical plate structure is welded to the upper end of the steering multi-interface casting, and the rear end is welded to the right steering truss; the upper ends of the steering left vertical plate structure and the steering right vertical plate structure are respectively provided with a shock absorber mounting seat and an airbag mounting seat.

[0009] The chassis includes a front axle module, which includes a front axle front vertical piece structure at the front end, a front axle rear vertical piece structure arranged at the rear end, a front axle left vertical piece structure, a front axle right vertical piece structure, and front and rear through beams connecting the front axle front vertical piece structure and the front axle rear vertical piece structure; the front and rear through beams are arranged in the middle position of the bottom; two front axle mounting castings for mounting A-shaped swing arms are welded to the front axle left vertical piece structure and the front axle rear vertical piece structure; the front and rear through beams include middle rods and double-sided mounting castings respectively welded at both ends of the middle rods; the front axle front vertical piece structure and the front axle rear vertical piece structure are respectively welded with double-sided mounting castings on corresponding sides; the left sides of the two double-sided mounting castings are used to mount the two ends of an A-shaped swing arm, and the right sides of the two double-sided mounting castings are used to mount the two ends of another A-shaped swing arm.

[0010] The upper end of the double-sided mounting casting is welded to the bottom of the curved beam, and the two ends of the curved beam are respectively welded to the corresponding positions of the lower ends of the left vertical piece structure of the front axle and the right vertical piece structure of the front axle; the double-sided mounting casting includes a front mounting groove and a rear mounting groove with a common bottom surface, and the upper ends of the front mounting groove and the rear mounting groove are provided with an upper mounting platform, and the lower ends are provided with a lower mounting platform; an upper through hole is provided on the upper mounting platform, and a lower through hole is provided on the lower mounting platform; the left vertical piece structure of the front axle and the rear vertical piece structure of the front axle both include a basic truss composed of rods, the front axle mounting casting is welded to the basic truss, and two mounting through holes connected to the A-shaped swing arm are provided on the front axle mounting casting; airbag mounting parts and shock absorber mounting parts are provided on the outer sides of the upper ends of the left vertical piece structure of the front axle and the right vertical piece structure of the rear axle.

[0011] The base frame includes an aisle module, and the aisle module includes aisle beams distributed at intervals along the length direction of the aisle module; the aisle beams are detachably arranged on the aisle module.

[0012] The aisle module includes two left and right roller beams, and a fixed bracket is welded to the lower end of the roller beam; the aisle module does not have a part with a roller beam, and a fixed bracket is set on the chassis below the aisle module; the two ends of the aisle beam are fixed to the upper surface of the fixed bracket by bolts; an adhesive layer is set in the gap between the contact surface of the aisle beam, the fixed bracket and the roller beam.

[0013] The chassis also includes a middle section module whose front end is connected to the front axle module and whose rear end is connected to the drive axle module. The middle section module is located between the trusses at the center door position and a rectangular lifting frame space for installing the upgrade machine is set; two battery spaces for installing batteries are set above the lifting frame space; a reinforcement plate is set on the middle section module near the center door; the rear end of the reinforcement plate is connected to the truss where the battery space is located; the chassis also includes a front end module located at the front end, the rear end of the front end module is connected to the front axle module; the main frame of the front end module is symmetrical on the left and right.

[0014] Beneficial effects: Compared with the prior art, the functional parts of the present invention that connect the stabilizer bar, thrust rod, A-shaped swing arm and other force-bearing parts are formed by casting, and multiple connection ends are integrated, which can connect multiple thrust rods and stabilizer bars at the same time, and has good force-bearing performance, which greatly simplifies the previous truss structure that uses multiple welded rods as the connection end structure of the thrust rod and stabilizer bar. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a corresponding relationship diagram of the upper and lower arrangements of the main view and the top view of the utility model.

[0016] Figure 2 It is a three-dimensional schematic diagram of the front-end module.

[0017] Figure 3 This is a three-dimensional diagram of the front axle module.

[0018] Figure 4 This is an exploded view of the front axle module.

[0019] Figure 5 This is an enlarged view of the battery space in the middle module.

[0020] Figure 6 This is a three-dimensional diagram of the drive axle.

[0021] Figure 7 This is an exploded view of the drive axle.

[0022] Figure 8 This is a three-dimensional diagram of the steering axle.

[0023] Figure 9 This is the exploded view of the steering axle.

[0024] Figure 10 This is an enlarged view of the steering rear vertical plate structure in the steering axle (seen from the front).

[0025] Figure 11 This is a three-dimensional diagram of the aisle.

[0026] Figure 12 This is a connection diagram of the aisle beam.

[0027] Figure 13 It is a schematic diagram of driving multi-interface casting.

[0028] Figure 14 This is a schematic diagram of a double-sided mounting casting.

[0029] Figure 15 This is a schematic diagram of the front axle mounting casting.

[0030] Figure 16 This is a schematic diagram of the front axle and front axle module after assembly.

[0031] Figure 17 This is a top view of the drive module and steering axle module after assembly with the drive axle and steering axle.

[0032] Figure 18 yes Figure 17 Bottom view of .

[0033] The names of the components corresponding to the corresponding reference numerals in the figure are: 1 is the front-end module, 2 is the front axle module, 21 is the front axle front vertical plate structure, 22 is the front axle rear vertical plate structure, 23 is the front axle left vertical plate structure, 24 is the front axle right vertical plate structure, 25 are the front and rear through beams, 26 are the front axle mounting castings, 27 are the double-sided mounting castings, 28 are the airbag mounting parts, 29 are the shock absorber mounting parts, 3 are the middle section module, 30 are the reinforcement plates, 31 are the lifting frame space, 32 are the battery space, 4 are the drive axle module, 41 are the drive front vertical plate structure, 42 are the drive rear vertical plate structure, 43 are the drive left vertical plate structure, 44 are the drive right vertical plate structure, 45 are the drive multi-interface castings, 450 are the upper connecting end, 451 are the lower connecting end, 452 are the stabilizer bar connecting end, 46 are the shock absorbers Device support, 47 is the airbag support, 5 steering axle module, 52 is the steering rear vertical plate structure, 53 is the steering left vertical plate structure, 54 is the steering right vertical plate structure, 55 is the steering multi-interface casting, 551 is the second lower connecting end, 552 is the second stabilizer bar connecting end, 56 is the steering mounting casting, 560 is the second upper connecting end 560, 57 are movable beams, 58 are shock absorber mounting seats, 59 are airbag mounting seats; 6 rear section modules, 7 aisle modules, 70 are aisle crossbeams, 71 are roller beams, 72 are fixed brackets, 8 are drive axle stabilizer bars, 9 are drive axle upper thrust rods, 10 are drive axle lower thrust rods, 11 are steering axle stabilizer bars, 12 are steering axle upper thrust rods, 13 are steering axle lower thrust rods, 14 are airbags, 15 are shock absorbers, and 16 are A-shaped swing arms. DETAILED DESCRIPTION

[0034] In this utility model, unless otherwise specified or limited, the technical terms used herein shall have the ordinary meanings understood by persons skilled in the art to which this utility model relates. Terms such as "connected," "connected," "fixed," and "disposed" should be interpreted broadly and may refer to fixed, removable, or integral connections; direct or indirect connections through an intermediary; and mechanical or electrical connections. Unless otherwise specified or limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact or indirect contact through an intermediary. Furthermore, a first feature being "above," "above," or "above" a second feature may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. A first feature being "below," "below," or "below" a second feature may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature. Relational terms such as first and second are used solely to distinguish one entity or operation from another and do not necessarily require or imply any actual relationship or order between these entities or operations. The terms used in the description, such as "center", "transverse", "longitudinal", "length", "width", "thickness", "height", "front", "back", "left", "right", "up", "down", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", "clockwise", "counterclockwise", etc., to indicate the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, be constructed and operate in a specific orientation.

[0035] The following will combine the accompanying drawings and specific embodiments to clearly and completely describe the technical solution of the present invention. Figure 1-18 As shown, a passenger car chassis includes a drive axle module 4, wherein the drive axle module 4 includes a drive front vertical plate structure 41 arranged at the front end, the drive front vertical plate structure 41 includes at least one drive multi-interface casting 45, and the drive multi-interface casting 45 includes at least one connection end for connecting a thrust rod or a stabilizer bar. The connection end here can be a connection end for connecting a thrust rod, or a connection end for connecting a stabilizer bar. The same drive multi-interface casting 45 can connect one rod or multiple rods. In the utility model, the functional parts connecting the stabilizer bar, thrust rod, A-shaped swing arm 16 and other force-bearing parts are formed by casting, and at least one connection end is integrated, which has good force-bearing performance and greatly simplifies the previous truss structure that uses multiple welded rods as the structure of the thrust rod and stabilizer bar connection end 452.

[0036] Furthermore, the drive front vertical plate structure 41 includes two drive multi-interface castings 45 arranged side by side. Each drive multi-interface casting 45 includes an upper connecting end 450 at the upper end for connecting to the corresponding drive axle upper thrust rod 9, and a lower connecting end 451 at the lower end for connecting to the corresponding drive axle lower thrust rod 10. The two drive multi-interface castings 45 each include a stabilizer bar connecting end 452 for connecting to the same drive axle stabilizer bar 8. The left, right, front, and back directions here can be used as a reference for the front, back, left, and right orientation of the driver sitting on the seat. The drive axle is mounted on the drive axle module 4, and a stabilizer bar and four thrust rods are arranged between the drive axle and the drive front vertical plate structure 41. The connecting ends of the thrust rods and stabilizer bars are provided with ball joints or other commonly used structures, and the connecting ends are respectively provided with connecting holes. The upper connecting end 450 and the lower connecting end 451 are provided with corresponding connecting holes, and the connecting ends of the thrust rods are also provided with corresponding connecting holes, and are connected by bolts or other structures. The upper connecting end 450 and the lower connecting end 451 can be provided with avoidance holes as needed to provide space for the thrust rod to be installed.

[0037] The front drive plate structure 41 includes a left connecting rod disposed on the left side of the upper end of the left multi-interface casting 45 and a right connecting rod disposed on the right side of the upper end of the right multi-interface casting 45. A shock absorber support 46 and an airbag support 47 are welded to the left and right connecting rods, respectively. An upper rod is welded between the upper ends of the two multi-interface castings 45. The centerlines of the left, right, and upper rods coincide. The drive axle module 4 also includes a rear drive plate structure 42 disposed at the rear end, a left drive plate structure 43, and a right drive plate structure 44 connecting the front drive plate structure 41 and the rear drive plate structure 42. The rear drive plate structure 42 is a frame structure, on which two shock absorber supports 46 and two airbag supports 47 are respectively disposed, corresponding to the positions of the shock absorber 15 and airbag 14 at the rear of the drive axle. A lower rod is welded between the lower ends of the two multi-interface castings 45. Preferably, the upper rod and the lower rod can be the upper and lower sides of the U-shaped frame. The left and right ends of the U-shaped frame are welded to the two driving multi-interface castings 45 respectively. On a plane, the U-shaped frame, the two driving multi-interface castings 45, the left connecting rod, and the right connecting rod constitute the general shape of the driving front vertical plate structure 41. The force between the driving axle and the chassis is concentrated on the driving front vertical plate structure 41, which can greatly improve the force and simplify the structure of the driving axle module 4. The corresponding driving left vertical plate structure 43 can be a truss structure of a rod assembly, which is welded to the corresponding driving front vertical plate structure 41 through multiple rods. The shock absorber support 46 and the airbag support 47 can be sheet metal parts. The shock absorber support 46 is connected to the upper end of the shock absorber; the airbag 14 is installed on the airbag support 47. The shock absorber support 46 and the airbag support 47 are provided with the required mounting holes and mounting plates; the specific installation method belongs to the existing technology and will not be described in detail. The drive front vertical plate structure 41 of the present invention fully utilizes the concept of component integration design, integrates structural parts with functional parts, and highly integrates multiple independent and scattered parts, successfully realizing the integration of the original 56 parts into two integrated drive multi-interface castings 45. After the parts integration, the production of 56 parts was reduced, about 224 welds were reduced, the working time of each vehicle was saved by about 336 minutes, and the weight was reduced by 18kg; at the same time, the bending stiffness and torsional stiffness of the structure were improved by 5% and 7% respectively. The integrated casting improves the strength of the whole vehicle and enhances the reliability of the product. The concept of component integration reduces the number and weight of parts through the integration of structural parts, the integration of the frame and the upper thrust rod support, the integration of the lower thrust rod support and the stabilizer bar support, the use of stamped parts instead of diagonal braces, the integration of wire holes and brackets, and the application of large-size profiles.

[0038] Alternatively, the chassis further includes a steering axle module 5, which includes a steering rear vertical plate structure 52 disposed at the rear end. The steering rear vertical plate structure 52 includes two steering multi-interface castings 55 disposed side by side at the lower end and two steering mounting castings 56 disposed side by side above the steering multi-interface castings 55. Each of the multi-interface castings includes a second stabilizer bar connecting end 552 for connecting to the steering axle stabilizer bar 11 and a second lower connecting end 551 for connecting to the steering axle lower thrust rod 13. Each of the steering mounting castings 56 includes a second upper connecting end 560 for connecting to the steering axle upper thrust rod 12. The second lower connecting end 551 is located below the second stabilizer bar connecting end 552. The steering mounting casting 56 is located above and slightly outside the corresponding steering multi-interface casting 55. The specific positional relationship is related to the position of the steering axle upper thrust rod 12, the steering axle lower thrust rod 13, and the steering axle stabilizer bar 11 on the vehicle frame and is set as needed. The second stabilizer bar connecting end 552, the second upper connecting end 560, and the second lower connecting end 551 are all provided with corresponding holes or grooves, and the corresponding thrust rods and stabilizer bars are connected by bolts and other mechanisms. The specific connection structure with the stabilizer bar or thrust rod belongs to the existing technology and will not be described in detail. The steering axle can include two steering axle upper thrust rods 12, two steering axle lower thrust rods 13, and a steering axle stabilizer bar 11. The steering mounting casting 56 and the steering multi-interface casting 55 are welded to the remaining rods of the steering rear vertical plate structure 52. The utility model sets the interfaces of the load-bearing components such as the stabilizer bar and the thrust rod on special castings, and replaces the truss structure with a casting with multiple interfaces, which can effectively reduce the complexity of the truss, improve the force, and simplify the structure of the chassis. The structure of the steering mounting casting 56 and the steering multi-interface casting 55 is determined according to the position of the connection end and the mechanical properties required by the structure. In a specific embodiment, the steering multi-interface casting 55 can be a plate-shaped structure, with a second stabilizer bar connection end 552 disposed forwardly on the upper portion of the front surface, and a second lower connection end 551 disposed on the lower portion of the front surface. A horizontal plate is disposed behind the second stabilizer bar connection end 552, and a side surface for connection with the movable beam 57 is disposed on the left side. The horizontal plate is welded to the truss of the steering rear vertical plate structure 52.

[0039] A removable movable beam 57 is provided between the two steering multi-interface castings 55. The steering rear vertical plate structure 52 also includes an upward-facing left steering truss welded to the left side of the left multi-interface casting and an upward-facing right steering truss welded to the right side of the right multi-interface casting. Corresponding steering mounting castings 56 are welded to the left and right steering trusses. The steering axle module 5 also includes a left steering vertical plate structure 53 and a right steering vertical plate structure 54. The lower end of the left steering vertical plate structure 53 is welded to the upper end of the steering multi-interface casting 55, and its rear end is welded to the left steering truss. The lower end of the right steering vertical plate structure 54 is welded to the upper end of the steering multi-interface casting 55, and its rear end is welded to the right steering truss. A shock absorber mounting seat 58 and an airbag mounting seat 59 are provided at the upper ends of the left and right steering vertical plates 53 and 54, respectively. The shock absorber mounting seat 58 and the airbag mounting seat 59 may be sheet metal. The upper ends of the left and right steering trusses may be connected by a rod. The steering axle module 5 can also include a front steering upright structure, or it can be directly welded to the front module through the left and right steering upright structures 53 and 54. The movable beam 57 includes a beam body and beam ends welded to the ends of the beam body. The beam ends are bolted to the side of the corresponding steering multi-interface casting 55. The movable beam 57 is finally installed on the vehicle frame by workers, and workers must first remove the movable beam 57 for maintenance. In existing structures, to ensure the mechanical performance of the vehicle frame, the movable beam 57 needs to be relatively large, weighing over 20 kilograms. The improved structure of the utility model uses castings as load-bearing components, and the movable beam 57 weighs only approximately 3 kilograms, greatly facilitating installation and removal. The structures of the shock absorber mounting bracket 58 and the airbag mounting bracket 59 can adopt existing technology, such as including a base plate with mounting holes. The steering rear upright structure 52 of the utility model fully utilizes the design concept of component integration, integrating structural and functional components, and highly integrating multiple independent and dispersed components into two integrated multi-interface castings. After the parts integration, the production of 10 components was reduced, about 24 welds were reduced, the working time per vehicle was saved by about 56 minutes, and the weight was reduced by 13kg; the integrated casting increased the strength of the entire vehicle and improved product reliability.

[0040] Alternatively, the chassis includes a front axle module 2, which includes a front axle front vertical piece structure 21 at the front end, a front axle rear vertical piece structure 22 arranged at the rear end, a front axle left vertical piece structure 23 connecting the front axle front vertical piece structure 21 and the front axle rear vertical piece structure 22, a front axle right vertical piece structure 24, and front and rear through beams 25; the front and rear through beams 25 are arranged in the middle position of the bottom; two front axle mounting castings 26 arranged side by side for mounting an A-shaped swing arm 16 are welded to the front axle left vertical piece structure 23 and the front axle rear vertical piece structure 22; the front and rear through beams 25 include middle rods and double-sided mounting castings 27 respectively welded at both ends of the middle rods; the double-sided mounting castings 27 are respectively welded on the corresponding sides of the front axle front vertical piece structure 21 and the front axle rear vertical piece structure 22; the left sides of the two double-sided mounting castings 27 are used to mount the two ends of an A-shaped swing arm 16, and the right sides of the two double-sided mounting castings 27 are used to mount the two ends of another A-shaped swing arm 16. The front axle includes four A-shaped swing arms 16; two A-shaped swing arms 16 are provided at the upper end; the ends of one A-shaped swing arm 16 are connected to the two front axle mounting castings 26 of the left vertical plate structure 23 of the front axle, and the ends of the other A-shaped swing arm 16 are connected to the two front axle mounting castings 26 of the right vertical plate structure 24 of the front axle. The two A-shaped swing arms 16 at the lower end are respectively connected to the two double-sided mounting castings 27 on the same side.

[0041] The upper end of the double-sided mounting casting 27 is welded to the bottom of the curved beam, and the two ends of the curved beam are respectively welded to the corresponding positions at the lower ends of the front axle left vertical piece structure 23 and the front axle right vertical piece structure 24. The double-sided mounting casting 27 includes a front mounting groove and a rear mounting groove on a common bottom surface. The upper ends of the front mounting groove and the rear mounting groove are provided with an upper mounting platform, and the lower ends are provided with a lower mounting platform. The upper mounting platform is provided with an upper through-hole, and the lower mounting platform is provided with a lower through-hole. The front axle left vertical piece structure 23 and the front axle rear vertical piece structure 22 both include a basic truss composed of rods. The front axle mounting casting 26 is welded to the basic truss. The front axle mounting casting 26 is provided with two mounting through-holes for connecting to the A-shaped swing arm 16. The airbag mounting part 28 and the shock absorber mounting part 29 are respectively provided on the outer sides of the upper ends of the front axle left vertical piece structure 23 and the rear axle right vertical piece structure. The specific casting structure and the shock absorber mounting part 29 and the airbag mounting part 28 can be a sheet metal structure with bends and through-holes provided thereon as required. The front vertical plate structure 21 of the front axle and the rear vertical plate structure 22 of the front axle are truss structures composed of welded rods. The four mounting surfaces at the rear end of the front axle mounting casting 26 are embedded in the grid on the basic truss, and a mounting surface extends from the upper end to be welded to the rods of the basic truss. An opening is set in the middle of the front axle mounting casting 26. The mounting through-hole is set on the mounting surface; the connection method of the end of the A-shaped swing arm 16 belongs to the existing technology, and the structure of the corresponding mounting surface and the mounting through-hole also belongs to the existing technology and will not be described in detail. The curved beam is used to strengthen the structure. The structural parts and functional parts are integrated by the front and rear through beams 25, so that the complex welded parts are replaced by one-piece parts, which reduces production costs and the number of parts.

[0042] Alternatively, the chassis includes an aisle module 7, and the aisle module 7 includes aisle beams 70 spaced apart along the length direction of the aisle module 7; the aisle beams 70 are detachably arranged on the aisle module 7. The detachable connection method may be a bolt connection, etc. After the welding of the chassis of the bus is completed, it is necessary to perform an overall anti-corrosion treatment, and then threading. In the present utility model, the aisle beams 70 are not set on the chassis by welding. After the installation of the rest of the chassis is completed, the anti-corrosion treatment is performed, and then the threading is performed. After the threading, the aisle beams 70 are installed on the aisle module 7, which can effectively reduce the difficulty of threading and improve work efficiency.

[0043] The aisle module 7 includes left and right roller beams 71, each with a fixed bracket 72 welded to its lower end. In the portion of the aisle module 7 not equipped with the roller beam 71, the fixed bracket 72 is installed on the underframe below the module. The ends of the aisle crossbeam 70 are bolted to the upper surface of the fixed bracket 72. An adhesive layer is provided between the contact surfaces between the aisle crossbeam 70, the fixed bracket 72, and the roller beam 71. Special-shaped roller-formed parts are installed in the grooves of the left and right roller beams 71 to enhance bending and torsional rigidity. The portion of the aisle module 7 not equipped with the roller beam 71 is typically a door accessory during vehicle aging. By switching from welding to bolting and bonding, the aisle crossbeam 70 of the aisle module 7 improves chassis wiring harness routing and rerouting efficiency, shortens vehicle labor, and reduces manufacturing costs. The use of special-shaped roller-formed parts enhances structural reliability and strengthens the product's core competitiveness. Other common detachable connection methods and installation locations are also within the scope of this invention.

[0044] The chassis also includes a mid-section module 3, connected at the front end to the front axle module 2 and at the rear end to the drive axle module 4. Located between the trusses at the center door, the mid-section module 3 features a rectangular lift frame 31 for installing the upgrade unit. Above the lift frame 31 are two battery compartments 32 for installing batteries. A reinforcement plate 30 is installed on the mid-section module 3 near the center door. The rear end of the reinforcement plate 30 connects to the truss where the battery compartments 32 are located. The chassis also includes a front-end module 1, located at the front end. The rear end of the front-end module 1 connects to the front axle module 2. The main frame of the front-end module is bilaterally symmetrical. The battery compartments 32 can accommodate one or more batteries, separated by trusses. The present invention allows for multiple batteries to be installed at the center door. The presence of the battery compartments 32 results in insufficient strength, so reinforcement plates 30 are provided to increase strength. Bilateral symmetry of the main frame in the front-end model means that all components, except for those that cannot be bilaterally symmetrical, are bilaterally symmetrical, particularly below the driver's cab. In this structure, switching between left-hand and right-hand drive requires only a few adjustments to the positions of the connecting rods, and a single set of molds can be used. Compatibility with both left-hand and right-hand drive is also possible by adjusting the driver's seat mounting point.

[0045] In the accompanying drawings, the present invention may include a front-end module 1, a front axle module 2, a middle section module 3, a drive axle module 4, a steering axle module 5, and a rear section module 6 from front to back; a track module is arranged on top. The front-end module 1 mainly includes a front anti-collision beam, a module for moving the driver's chair backward as a whole after a collision, a battery side anti-collision beam mounting beam, a mid-range millimeter-wave radar mounting beam, a bottom anti-scratch beam, an anti-collision energy-absorbing component, a longitudinal left curved beam, a longitudinal right curved beam, a transverse connecting beam, a trailer hook beam, a driver's chair fixing bracket 72, a power battery bracket, a reinforcement angle, etc. The rear section module 6 may include left and right vertical plates, an anti-collision beam, a drive motor left vertical plate, a drive motor right vertical plate, a power battery bracket, a trailer hook, an extension beam, a drive motor lower movable beam 57, etc. These belong to the prior art and will not be described in detail. In fact, the present invention can be applied to various types of motor vehicles such as buses, passenger cars, trucks, etc., and can be applied in the field of electric vehicles as well as in the field of gasoline vehicles. The drive axle module 4 of this utility model can be selected or omitted depending on the vehicle model; the mid-section module 3 can be manufactured in various lengths according to actual needs and assembled in sections. The front axle module 2, drive axle module 4, and rear axle module can be expanded to all vehicle models on the platform, reducing the design workload for subsequent new models by 30%. By fully leveraging the principle of component integration, structural and functional components are integrated to achieve a single piece instead of complex welded parts. This integrated casting improves vehicle strength, enhances product reliability, reduces production costs, and reduces the number of parts.

[0046] The present invention adopts an assembly modular combination design concept, decomposing the assembly into modules, realizing a product development model that can adapt to changes with the same components, and can promote the universal modules integrated in the early stage to new product applications. After universalization, mass production can be achieved, and the introduction of integrated die-casting technology can further reduce the number of parts and production costs. Modular tooling fixtures are adopted to adapt to the changing product development model, and automated robot welding replaces manual labor. Moreover, the present invention makes full use of the component integration design concept, integrating structural parts with functional parts, realizing the replacement of complex welded parts with one piece, reducing production costs and the number of parts. It can quickly realize the layout of high-end products and the construction of high-end capabilities, and lays a good foundation for the subsequent realization of large-scale automated production and manufacturing by applying design concepts such as component integration and assembly modularization, thereby further enhancing product competitiveness.

[0047] The technical features of the above-described embodiments may be combined in any manner, and as long as there are no contradictions in the combination of these technical features, they shall be deemed to be within the scope of this specification. Without departing from the overall concept of the present invention, the technical solutions of the present invention, their equivalent replacements or modifications, and certain changes and improvements made thereto shall also be deemed to be within the scope of protection of the present invention.

Claims

1. A passenger car underframe, including a drive axle module, characterized in that: The drive axle module includes a drive front vertical plate structure arranged at the front end, the drive front vertical plate structure includes at least one drive multi-interface casting, and the drive multi-interface casting includes at least one connection end for connecting a thrust rod or a stabilizer rod.

2. The passenger car underframe according to claim 1, characterized in that: The drive front vertical plate structure includes two drive multi-interface castings arranged side by side; each drive multi-interface casting includes an upper connecting end located at the upper end for connecting to the thrust rod on the corresponding drive axle, and a lower connecting end located at the lower end for connecting to the lower thrust rod on the corresponding drive axle; the two drive multi-interface castings respectively include a stabilizer bar connecting end connected to the same drive axle stabilizer bar.

3. The passenger car underframe according to claim 2, characterized in that: The driving front vertical plate structure includes a left connecting rod arranged on the left side of the upper end of the left driving multi-interface casting, and a right connecting rod arranged on the right side of the upper end of the right driving multi-interface casting, and respective shock absorber supports and airbag supports are welded on the left connecting rod and the right connecting rod respectively; an upper rod is welded between the upper ends of the two driving multi-interface castings; the center lines of the left connecting rod, the right connecting rod and the upper rod coincide; the driving axle module also includes a driving rear vertical plate structure arranged at the rear end, a driving left vertical plate structure and a driving right vertical plate structure connected to the driving front vertical plate structure and the driving rear vertical plate structure; the driving rear vertical plate structure is a frame structure, on which two shock absorber supports and two airbag supports are respectively arranged at the positions of the shock absorbers and airbags at the rear of the driving axle.

4. The passenger car underframe according to claim 1, characterized in that: The underframe also includes a steering axle module, which includes a steering rear vertical plate structure arranged at the rear end; the steering rear vertical plate structure includes two steering multi-interface castings arranged side by side at the lower end and two steering mounting castings arranged side by side above the steering multi-interface castings; each of the steering multi-interface castings includes a second stabilizer bar connecting end for connecting to the steering axle stabilizer bar and a second lower connecting end for connecting to the lower thrust rod of the steering axle; each of the steering mounting castings includes a second upper connecting end for connecting to the upper thrust rod of the steering axle.

5. The passenger car underframe according to claim 4, characterized in that: A detachable movable beam is arranged between the two steering multi-interface castings; the steering rear vertical plate structure also includes an upward left steering truss welded on the left side of the left multi-interface casting and an upward right steering truss welded on the right side of the right multi-interface casting; corresponding steering mounting castings are distributed and welded on the left steering truss and the right steering truss; the steering axle module also includes a steering left vertical plate structure and a steering right vertical plate structure; the lower end of the steering left vertical plate structure is welded to the upper end of the steering multi-interface casting, and the rear end is welded to the left steering truss; the lower end of the steering right vertical plate structure is welded to the upper end of the steering multi-interface casting, and the rear end is welded to the right steering truss; the upper ends of the steering left vertical plate structure and the steering right vertical plate structure are respectively provided with a shock absorber mounting seat and an airbag mounting seat.

6. The passenger car underframe according to claim 1, characterized in that: The chassis includes a front axle module, which includes a front axle front vertical piece structure at the front end, a front axle rear vertical piece structure arranged at the rear end, a front axle left vertical piece structure, a front axle right vertical piece structure, and front and rear through beams connecting the front axle front vertical piece structure and the front axle rear vertical piece structure; the front and rear through beams are arranged in the middle position of the bottom; two front axle mounting castings for mounting A-shaped swing arms are welded to the front axle left vertical piece structure and the front axle rear vertical piece structure; the front and rear through beams include middle rods and double-sided mounting castings respectively welded at both ends of the middle rods; the front axle front vertical piece structure and the front axle rear vertical piece structure are respectively welded with double-sided mounting castings on corresponding sides; the left sides of the two double-sided mounting castings are used to mount the two ends of an A-shaped swing arm, and the right sides of the two double-sided mounting castings are used to mount the two ends of another A-shaped swing arm.

7. The passenger car underframe according to claim 6, characterized in that: The upper end of the double-sided mounting casting is welded to the bottom of the curved beam, and the two ends of the curved beam are respectively welded to the corresponding positions of the lower ends of the left vertical piece structure of the front axle and the right vertical piece structure of the front axle; the double-sided mounting casting includes a front mounting groove and a rear mounting groove with a common bottom surface, and the upper ends of the front mounting groove and the rear mounting groove are provided with an upper mounting platform, and the lower ends are provided with a lower mounting platform; an upper through hole is provided on the upper mounting platform, and a lower through hole is provided on the lower mounting platform; the left vertical piece structure of the front axle and the rear vertical piece structure of the front axle both include a basic truss composed of rods, the front axle mounting casting is welded to the basic truss, and two mounting through holes connected to the A-shaped swing arm are provided on the front axle mounting casting; airbag mounting parts and shock absorber mounting parts are provided on the outer sides of the upper ends of the left vertical piece structure of the front axle and the right vertical piece structure of the rear axle.

8. The passenger car underframe according to claim 1, characterized in that: The base frame includes an aisle module, and the aisle module includes aisle beams distributed at intervals along the length direction of the aisle module; the aisle beams are detachably arranged on the aisle module.

9. The passenger car underframe according to claim 8, characterized in that: The aisle module includes two left and right roller beams, and a fixed bracket is welded to the lower end of the roller beam; the aisle module does not have a part with a roller beam, and a fixed bracket is set on the chassis below the aisle module; the two ends of the aisle beam are fixed to the upper surface of the fixed bracket by bolts; an adhesive layer is set in the gap between the contact surface of the aisle beam, the fixed bracket and the roller beam.

10. The passenger car underframe according to claim 1, characterized in that: The chassis also includes a middle section module whose front end is connected to the front axle module and whose rear end is connected to the drive axle module. The middle section module is located between the trusses at the center door position and a rectangular lifting frame space for installing the upgrade machine is set; two battery spaces for installing batteries are set above the lifting frame space; a reinforcement plate is set on the middle section module near the center door; the rear end of the reinforcement plate is connected to the truss where the battery space is located; the chassis also includes a front end module located at the front end, the rear end of the front end module is connected to the front axle module; the main frame of the front end module is symmetrical on the left and right.

Images