CN114104108A

CN114104108A - Chassis structure suitable for new energy automobile

Info

Publication number: CN114104108A
Application number: CN202111244620.6A
Authority: CN
Inventors: 周宇
Original assignee: Suzhou Weizhong Technology Development Co ltd
Current assignee: Suzhou Weizhong Technology Development Co ltd
Priority date: 2021-10-26
Filing date: 2021-10-26
Publication date: 2022-03-01
Also published as: WO2023070622A1

Abstract

The invention provides an automobile chassis structure, which comprises a structural frame, wherein a closing plate is arranged on the upper side of the structural frame, and an equipment mounting frame is arranged on the upper side of the closing plate; the structure frame comprises two bearing beams which are arranged in parallel, and the two bearing beams are connected through a plurality of fixed beams; the closing plate is attached to the upper side face of the bearing beam; the equipment mounting frame comprises a rectangular frame arranged on the upper side of the closing plate, and at least two longitudinal rods arranged in parallel are arranged in the rectangular frame; rectangle frame and rather than adjacent vertical pole to and all be provided with a plurality of horizontal poles between two adjacent vertical poles, be used for the cooperation vertical pole will the region that the rectangle frame limit formed divides into a plurality of installing zones, dispose the fixed subassembly of equipment in the installing zone. The invention has certain universality, can be used for producing and using vehicles of different types, has stable structure, can monitor the deformation quantity of the bearing beam and has high safety.

Description

Chassis structure suitable for new energy automobile

Technical Field

The invention relates to the technical field of automobiles, in particular to a chassis structure suitable for a new energy automobile.

Background

The traditional automobile chassis mainly comprises a transmission system, a running system, a steering system and a braking system, is mainly used for supporting and mounting various parts of an automobile, forming the integral model of the automobile and receiving the power of an engine to enable the automobile to move and ensure normal running, and is an important component of an automobile structure. At present, the transmission forms of automobiles mainly include mechanical transmission, hydraulic transmission, electric transmission and the like, and different transmission forms correspond to different power systems and are embodied on a chassis to correspond to different mounting structures. Therefore, it is one of the important concerns to solve the problem of universality of the automobile chassis.

At the same time, the strength requirements are high in practice due to the importance of the vehicle chassis. Generally, the damage to the chassis of the automobile mainly has the following forms:

1. deformation damage, because the automobile chassis needs to bear a plurality of automobile components when in use, the automobile chassis can have a certain degree of structural deformation after long-term use, and even the main bearing part is broken, thereby affecting the driving safety;

2. the rainwater acidity is enhanced due to corrosion and acid pollution in the air, the automobile chassis made of metal is easily corroded and damaged under the action of acidic rainwater, meanwhile, the automobile chassis inevitably contacts sewage when in use due to the position relation of the automobile chassis, the sewage on a road contains oil substances, and the automobile chassis is corroded to a certain extent by the sewage.

Therefore, the maintenance of the automobile chassis is one of the important issues that people need to pay attention to.

Chinese patent publication No. CN111422258A discloses an automobile chassis structure, which includes a frame, a water tank mounting bracket, a first driving mechanism mounting bracket, a second driving mechanism mounting bracket, a control mechanism mounting bracket, and a plurality of power supply mechanism mounting brackets; the frame is divided into a first area, a second area and a third area by a plurality of longitudinal rods; the first area and the third area are symmetrically distributed; the first driving mechanism mounting rack and the second driving mechanism mounting rack are sequentially arranged in the lower side of the second area; the control mechanism mounting rack and the water tank mounting rack are sequentially arranged in the upper side of the second area; the power supply mechanism mounting frames are symmetrically arranged in the lower sides of the first area and the third area.

However, above-mentioned patent only constitutes vehicle chassis frame with horizontal and vertical pole group to make vehicle chassis below most space expose, the problem of above-mentioned chassis damage inevitably appears, and the security is not high, and simultaneously, for adaptation fuel drive and electric drive, set up correspondingly first actuating mechanism mounting bracket and second actuating mechanism mounting bracket, increased the processing degree of difficulty, influence machining efficiency.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides a chassis structure suitable for a new energy automobile.

The purpose of the invention is realized by the following technical scheme: the automobile chassis structure comprises a structural frame, wherein a closing plate is arranged on the upper side of the structural frame, and an equipment mounting frame is arranged on the upper side of the closing plate; the structure frame comprises two bearing beams which are arranged in parallel, and the two bearing beams are connected through a plurality of fixed beams; the closing plate is attached to the upper side face of the bearing beam; the equipment mounting frame comprises a rectangular frame arranged on the upper side of the closing plate, and at least two longitudinal rods arranged in parallel are arranged in the rectangular frame; rectangle frame and rather than adjacent vertical pole to and all be provided with a plurality of horizontal poles between two adjacent vertical poles, be used for the cooperation vertical pole will the region that the rectangle frame limit formed divides into a plurality of installing zones, dispose the fixed subassembly of equipment in the installing zone.

Preferably, the equipment fixing assembly comprises a part ring arranged on the upper side surface of the closing plate, a fixing plate is arranged in the part ring, and the fixing plate is connected with the closing plate through a supporting plate; a plurality of longitudinal screw holes are arranged on the fixing plate in a penetrating manner, and a plurality of transverse screw holes are arranged on the inner wall of each longitudinal screw hole in a manner of extending along the extending direction of the longitudinal screw hole; the fixing plates are distributed in the area defined by the part ring.

Preferably, the rectangular frame is connected with the closing plate through a plurality of support rods, and reinforcing rods are arranged between two adjacent support rods distributed in the length direction of the rectangular frame.

Preferably, the lower side surface of the closing plate is provided with a first flange in an integrally formed manner, and the inner side surface of the first flange is attached to the bearing beam; the bearing beam is connected with the first flange through a first bolt.

Preferably, a protection plate is arranged on the lower side of the structure frame, a second flange is integrally formed on the upper side surface of the protection plate, and the inner side surface of the second flange is in sliding fit with the bearing beam; a plurality of adjusting holes penetrate through the second flange, second bolts penetrate through the adjusting holes, and the second bolts are in threaded connection with bearing beams corresponding to the second bolts and are in sliding connection with the adjusting holes.

Preferably, the adjusting hole is a kidney-shaped hole.

Preferably, the upper side of the protection plate is provided with a pressing plate, and the pressing plate is distributed between the protection plate and the bearing beam; a plurality of springs are arranged between the protection plate and the pressing plate in a manner of extending along the length direction of the bearing beam, one ends of the springs are connected to the protection plate, and the other ends of the springs are connected to the pressing plate; when the second flange is in sliding fit with the bearing beam, the pressing plate is in fit with the lower side face of the bearing beam and compresses the spring.

Preferably, the bearing beam is cuboid, the middle part of the bearing beam in the length direction is provided with a laser emitter, the end part of the bearing beam is provided with a laser induction module, and the laser emitter and the laser induction module are positioned on the same straight line; the system also comprises a terminal, an alarm module, a data analysis system and a central processing unit; the terminal, the alarm module and the data analysis system are all electrically connected with the central processing unit, and the laser sensing module is electrically connected with the data analysis system.

Preferably, two adjacent fixed beams are connected through a plurality of reinforcing beams; the reinforcing beam is in a hollow cuboid shape, and a reinforcing plate with a cross-shaped cross section is arranged in the inner cavity of the reinforcing beam.

Preferably, a plurality of the longitudinal screw holes are uniformly distributed at equal intervals, and a plurality of the transverse screw holes are uniformly distributed at equal intervals; the extending direction of the longitudinal screw hole is vertical to the extending direction of the transverse screw hole.

The invention has the following advantages:

(1) the equipment mounting frame is matched with the equipment fixing component to fixedly mount automobile parts, the sealing plate is used for separating the bearing beam from automobile equipment, on one hand, a proper mounting environment is provided for mounting the equipment, on the other hand, the automobile equipment can be protected, the automobile equipment is prevented from being damaged, in addition, the upper side of the sealing plate is divided into a plurality of mounting areas through the matching among the rectangular frame, the transverse rods and the longitudinal rods, in practice, the mounting areas can be reasonably utilized according to specific automobile types, the equipment fixing component is configured in the corresponding mounting area, the universal use of the chassis is realized to a certain extent, the equipment fixing component can be arranged in all the mounting areas, and the reasonable utilization can be realized in use; the structure that spandrel girder cooperation fixed beam has guaranteed the intensity of chassis.

(2) The fixing plate is used for supporting the automobile equipment, the plurality of longitudinal screw holes and the plurality of transverse screw holes are used for fixedly mounting the automobile equipment on the fixing plate through bolts, and the arrangement of the plurality of longitudinal screw holes and the plurality of transverse screw holes is convenient for adjusting the mounting position of the bolts, so that the fixing plate can be used for mounting the automobile equipment with various models, and the universality of the automobile chassis is improved;

(3) the part ring provided by the invention can fix scattered small parts in the range of the automobile equipment during disassembly and assembly, so that the small parts are prevented from being lost.

(4) The protection plate arranged in the invention is matched with the second flange to form a seal below the structure frame, so that the structure frame can be effectively isolated, namely the contact between the bearing beam and the like and accumulated water is isolated, the structure frame can be prevented from being corroded, and the service life of the automobile chassis is prolonged.

(5) The pressing plate provided by the invention can buffer the protection plate by matching with the spring, so that the service life of the protection plate can be prolonged.

(6) The laser sensing module is used for monitoring the position change of laser emitted by the laser emitter so as to judge whether the bearing beam is bent or not, and the central processing unit, the data analysis system, the terminal and the alarm module are matched to realize real-time monitoring of the bearing beam, so that a driver can be helped to master the deformation condition of the bearing beam, and safe driving is facilitated.

Drawings

FIG. 1 is a schematic perspective view of the preferred embodiment of the present invention;

FIG. 2 is a schematic top view of the preferred embodiment of the present invention;

FIG. 3 is a schematic cross-sectional view of section E-E of FIG. 2;

FIG. 4 is an enlarged view of a portion of the structure of FIG. 1 at A;

FIG. 5 is an enlarged view of a portion of the structure at B in FIG. 1;

FIG. 6 is an enlarged view of a portion of the structure of FIG. 3 at C;

FIG. 7 is an enlarged partial schematic view of the structure of FIG. 3 at D;

FIG. 8 is a schematic bottom view of the preferred embodiment of the present invention;

FIG. 9 is a schematic bottom view of the present invention with the protection plate removed;

FIG. 10 is a structural view showing a cross section of a reinforcing beam according to the present invention;

fig. 11 is a schematic view of a connection structure of the central processing unit, the laser sensing module, the data analysis system, the alarm module and the terminal according to the present invention.

In the figure, 11-longitudinal rod, 12-rectangular frame, 13-reinforcing rod, 14-transverse rod, 15-supporting rod, 16-mounting area, 2-fixing plate, 21-longitudinal screw hole, 22-transverse screw hole, 23-supporting plate, 24-part ring, 3-closing plate, 31-first flange, 32-first bolt, 4-protecting plate, 41-second flange, 42-spring, 43-pressing plate, 44-adjusting hole, 45-anti-collision ball, 5-bearing beam, 51-second bolt, 52-fixing beam, 53-reinforcing beam, 531-reinforcing plate, 61-laser sensing module, 62-laser emitter, 700-data analysis system, 710-central processor, 720-alarm module and 730-terminal.

Detailed Description

The invention will be further described with reference to the accompanying drawings, without limiting the scope of the invention to the following:

as shown in fig. 1 to 11, the present application provides an automobile chassis structure including a structural frame, a closing plate 3 disposed on an upper side of the structural frame, and an equipment mounting bracket disposed on an upper side of the closing plate 3. In this embodiment, as shown in fig. 9, the structural frame includes two bearing beams 5 arranged in parallel, and the two bearing beams 5 are connected by a plurality of fixed beams 52; the closing plate 3 is attached to the upper side surface of the bearing beam 5. Preferably, the fixed beam 52 is shown welded to the load beam 5. As shown in fig. 1, 2, 3 and 4, the equipment mounting frame includes a rectangular frame 12 disposed on the upper side of the closing plate 3, and at least two parallel vertical rods 11 are disposed in the rectangular frame 12; the rectangular frame 12 and the vertical rods 11 adjacent to the rectangular frame, and the plurality of cross rods 14 are arranged between two adjacent vertical rods 11, and are used for dividing the area defined by the rectangular frame 12 into a plurality of installation areas 16 by matching with the vertical rods 11, and equipment fixing components are arranged in the installation areas 16. The equipment mounting rack is matched with the equipment fixing component to fixedly mount automobile parts. Such as the water tank, engine, and battery pack of an automobile. In this embodiment, the closing plate 3 is used for separating the bearing beam 5 from the automobile equipment, on one hand, a suitable installation environment is provided for installation of the equipment, and on the other hand, the automobile equipment can be protected to prevent the automobile equipment from being damaged. Here through the cooperation between rectangle frame 12, horizontal pole 14 and vertical pole 11 with the closing plate 3 upside divide into a plurality of installing zones 16, can rationally utilize installing zone 16 according to specific motorcycle type in practice to the corresponding installing zone 16 configuration equipment fixing component can, realized the general of chassis to a certain extent, for further general purpose, can all set up equipment fixing component in all installing zones 16, rational utilization when using can. The structure of the bearing beam 5 matched with the fixed beam 52 ensures the strength of the chassis.

Further, as shown in fig. 4, the equipment fixing assembly includes a part ring 24 disposed on the upper side surface of the closing plate 3, the fixing plate 2 is disposed in the part ring 24, and the fixing plate 2 is connected to the closing plate 3 through a support plate 23; a plurality of longitudinal screw holes 21 are arranged on the fixing plate 2 in a penetrating way, and a plurality of transverse screw holes 22 are arranged on the inner wall of each longitudinal screw hole 21 in a manner of extending along the extending direction of each longitudinal screw hole 21; the holding plate 2 is distributed in the area defined by the part ring 24. In this embodiment, the fixing plate 2 is used for supporting the automobile equipment, and the plurality of longitudinal screw holes 21 and the plurality of transverse screw holes 22 are provided for fixedly mounting the automobile equipment on the fixing plate 2 by bolts. Preferably, a plurality of longitudinal screw holes 21 are equidistantly and uniformly distributed, and a plurality of transverse screw holes 22 are equidistantly and uniformly distributed. The longitudinal screw holes 21 extend in a direction perpendicular to the lateral screw holes 22. The arrangement of the longitudinal screw holes 21 and the transverse screw holes 22 facilitates the adjustment of the installation position of the bolts, so that the fixing plate 2 can be used for installing various types of automobile equipment, and the universality of the automobile chassis is improved. In some embodiments, the part ring 24, the supporting plate 23 and the fixing plate 2 are integrated, that is, the device fixing assembly is an independent unit and fixed on the closing plate 3, so that the processing and production of the automobile chassis are facilitated, the high integration level is favorable for improving the processing efficiency, increasing the interchangeability between accessories and saving the cost. In this embodiment, the part ring 24 has a closed square frame shape. In other embodiments, the part ring 24 may be any other closed ring shape. The part ring 24 can fix scattered small parts in the range when the automobile equipment is assembled and disassembled, and the small parts are prevented from being lost.

As shown in fig. 1 and 3, the rectangular frame 12 is connected to the closing plate 3 by a plurality of support rods 15, and reinforcing rods 13 are disposed between two adjacent support rods 15 distributed in the longitudinal direction of the rectangular frame 12. The reinforcing rods 13, the supporting rods 15 and the rectangular frame 12 form triangular knots, so that stability is improved.

In the present embodiment, as shown in fig. 3 and 6, the lower side surface of the closing plate 3 is provided with the first flange 31 in an integrally formed manner, and the inner side surface of the first flange 31 is attached to the load beam 5; the load beam 5 is connected to the first flange 31 by a first bolt 32. When the sealing plate 3 is used, the sealing plate 3 can be directly buckled on the bearing beam 5, and then the first bolt 32 penetrates through the first flange 31 and is embedded into the bearing beam 5, so that the sealing plate 3 is installed.

In this embodiment, in order to protect the main structure of the automobile chassis from being corroded by acidic rainwater (accumulated water) or oily sewage, as shown in fig. 1, 3, 6, and 8, the protective plate 4 is disposed on the lower side of the structural frame, the second flange 41 is disposed on the upper side surface of the protective plate 4 in an integrally molded manner, and the inner side surface of the second flange 41 is in sliding contact with the load-bearing beam 5. A plurality of adjusting holes 44 are arranged on the second flange 41 in a penetrating way, a second bolt 51 is arranged in the adjusting hole 44 in a penetrating way, and the second bolt 51 is connected with the corresponding bearing beam 5 in a threaded way and is connected with the adjusting holes 44 in a sliding way. The protection plate 4 is matched with the second flange 41 to form a seal under the structural frame, so that the structural frame, namely the bearing beam 5 and the like are effectively isolated from being contacted with accumulated water, the structural frame can be prevented from being corroded, and the service life of the automobile chassis is prolonged. The adjustment holes 44 can be used here for adjusting the mounting height of the protective plate 4. Further, the adjustment hole 44 is a kidney-shaped hole.

Further, as shown in fig. 3, 6 and 7, a pressing plate 43 is disposed on the upper side of the protection plate 4, and the pressing plate 43 is distributed between the protection plate 4 and the bearing beam 5; a plurality of springs 42 are arranged between the protection plate 4 and the pressing plate 43 in a manner of extending along the length direction of the bearing beam 5, one end of each spring 42 is connected to the protection plate 4, and the other end of each spring 42 is connected to the pressing plate 43; when the second flange 41 is in sliding engagement with the load beam 5, the pressure plate 43 engages the underside of the load beam 5 and compresses the spring 42. The pressure plate 43 here, in conjunction with the spring 42, can cushion the protective plate 4. For example, when the vehicle runs on a gravel road, the wheels crush gravel, the gravel impacts the protection plate 4, and the spring 42 is compressed to absorb the impact of the gravel, so that the service life of the protection plate 4 is prolonged. In this embodiment, the lower side surface of the protection plate 4 is provided with a plurality of collision-proof balls 45 which are uniformly distributed at equal intervals. The anti-collision ball 45 is hemispherical and is used for changing the flight direction of the crushed stone and increasing the structural strength of the protection plate 4.

In this embodiment, as shown in fig. 3, 6, 7, 9 and 11, the bearing beam 5 is rectangular, a laser emitter 62 is disposed in the middle of the bearing beam 5 in the length direction, a laser sensing module 61 is disposed at the end of the bearing beam 5, and the laser emitter 62 and the laser sensing module 61 are on the same straight line; also included are a terminal 730, an alarm module 720, a data analysis system 700, and a central processor 710; the terminal 730, the alarm module 720 and the data analysis system 700 are all electrically connected with the central processor 710, and the laser sensing module 61 is electrically connected with the data analysis system 700. The laser sensing module 61 may be a PSD position sensor module, and is configured to monitor a position change of the laser emitted from the laser emitter 62, so as to determine whether the load-bearing beam 5 has a bending deformation. The terminal 730 may be any one of a vehicle-mounted display, a mobile phone, or a tablet computer. The alarm module 720 may be integrated into the terminal 730, as may a voice alarm. When the laser sensing module 61 is used, the laser emitter 62 emits a linear laser beam to the laser sensing modules 61 arranged on the same straight line, at the moment, the laser sensing modules 61 determine the position coordinates of light spots as initial position coordinates and store the initial position coordinates in the data analysis system 700, when the bearing beam 5 is bent, the position of the laser emitter 62 relative to the laser sensing modules 61 changes, namely, the position of the light spots irradiated on the laser sensing modules 61 changes, at the moment, the laser sensing modules 61 input the current position coordinates of the light spots into the data analysis system 700 and compare the current position coordinates with the initial position coordinates to judge the deformation amount, and meanwhile, the deformation data are transmitted to the terminal 730 through the central processing unit 710, so that a driver can conveniently master the vehicle condition. In addition, an extreme deformation value of the load-bearing beam 5 is stored in the data analysis system 700, and when the deformation value exceeds the extreme deformation value, the central processing unit 710 receives the data of the data analysis system 700 and outputs a signal to the alarm module 720 to prompt a driver to overhaul the vehicle.

As shown in fig. 10, two adjacent fixed beams 52 are connected by a plurality of reinforcing beams 53; the reinforcing beam 53 is in a hollow rectangular parallelepiped shape, and a reinforcing plate 531 having a cross-shaped cross section is provided in an inner cavity of the reinforcing beam 53. The reinforcing beam 53 may further increase the strength of the chassis. The hollow reinforcing beam 53 contributes to weight reduction, while the reinforcing plate 531 may increase the strength of the reinforcing beam 53.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The automobile chassis structure is characterized by comprising a structural frame, wherein a closing plate (3) is arranged on the upper side of the structural frame, and an equipment mounting frame is arranged on the upper side surface of the closing plate (3); the structure frame comprises two bearing beams (5) which are arranged in parallel, and the two bearing beams (5) are connected through a plurality of fixed beams (52); the closing plate (3) is attached to the upper side face of the bearing beam (5); the equipment mounting frame comprises a rectangular frame (12) arranged on the upper side of the closing plate (3), and at least two longitudinal rods (11) arranged in parallel are arranged in the rectangular frame (12); rectangle frame (12) and rather than adjacent vertical pole (11) to and all be provided with a plurality of horizontal poles (14) between two adjacent vertical poles (11), be used for cooperation vertical pole (11) with the region that rectangle frame (12) limited and formed divides into a plurality of installing zones (16), dispose the fixed subassembly of equipment in installing zone (16).

2. The vehicle chassis structure according to claim 1, wherein the equipment fixing assembly comprises a part ring (24) arranged on the upper side of the closing plate (3), a fixing plate (2) is arranged in the part ring (24), and the fixing plate (2) is connected with the closing plate (3) through a support plate (23); a plurality of longitudinal screw holes (21) are arranged on the fixing plate (2) in a penetrating manner, and a plurality of transverse screw holes (22) are arranged on the inner wall of each longitudinal screw hole (21) in a manner of extending along the extending direction of each longitudinal screw hole (21); the fixing plates (2) are distributed in the area defined by the part ring (24).

3. The vehicle chassis structure according to claim 1 or 2, wherein the rectangular frame (12) is connected to the closing plate (3) by a plurality of support bars (15), and reinforcing bars (13) are disposed between two adjacent support bars (15) of the rectangular frame (12) in the lengthwise direction.

4. The vehicle chassis structure according to claim 3, wherein the underside of the closure plate (3) is provided with a first flange (31) in an integrally formed manner, the inner side of the first flange (31) abutting the load-bearing beam (5); the bearing beam (5) is connected with the first flange (31) through a first bolt (32).

5. The automotive chassis structure according to claim 1, characterized in that a protective plate (4) is provided on the lower side of the structural frame, a second flange (41) is provided on the upper side of the protective plate (4) in an integrally molded manner, and the inner side surface of the second flange (41) is in sliding contact with the load-bearing beam (5); the second flange (41) is provided with a plurality of adjusting holes (44) in a penetrating mode, second bolts (51) penetrate through the adjusting holes (44), and the second bolts (51) are in threaded connection with the corresponding bearing beams (5) and are in sliding connection with the adjusting holes (44).

6. The vehicle chassis structure according to claim 5, wherein the adjustment hole (44) is a kidney-shaped hole.

7. The vehicle chassis structure according to claim 6, wherein a pressing plate (43) is arranged on the upper side of the protective plate (4), and the pressing plate (43) is distributed between the protective plate (4) and the bearing beam (5); a plurality of springs (42) are arranged between the protection plate (4) and the pressing plate (43) in a manner of extending along the length direction of the bearing beam (5), one ends of the springs (42) are connected to the protection plate (4), and the other ends of the springs are connected to the pressing plate (43); when the second flange (41) is in sliding engagement with the load beam (5), the pressure plate (43) engages the underside of the load beam (5) and compresses the spring (42).

8. The automobile chassis structure according to claim 1, wherein the bearing beam (5) is rectangular, a laser emitter (62) is arranged in the middle of the bearing beam (5) in the length direction, a laser sensing module (61) is arranged at the end of the bearing beam (5), and the laser emitter (62) and the laser sensing module (61) are in the same straight line; the system also comprises a terminal (730), an alarm module (720), a data analysis system (700) and a central processing unit (710); the terminal (730), the alarm module (720) and the data analysis system (700) are all electrically connected with the central processing unit (710), and the laser sensing module (61) is electrically connected with the data analysis system (700).

9. The vehicle chassis structure according to claim 1, wherein adjacent two of the fixing beams (52) are connected by a plurality of reinforcing beams (53); the reinforcing beam (53) is in a hollow cuboid shape, and a reinforcing plate (531) with a cross-shaped cross section is arranged in the inner cavity of the reinforcing beam (53).

10. The vehicle chassis structure according to claim 2, wherein a plurality of said longitudinal screw holes (21) are equally spaced and a plurality of said lateral screw holes (22) are equally spaced; the extending direction of the longitudinal screw hole (21) is vertical to the extending direction of the transverse screw hole (22).