WO2023070622A1

WO2023070622A1 - Chassis structure applicable to new-energy vehicle

Info

Publication number: WO2023070622A1
Application number: PCT/CN2021/127765
Authority: WO
Inventors: 周宇
Original assignee: 苏州渭中科技发展有限公司
Priority date: 2021-10-26
Filing date: 2021-10-30
Publication date: 2023-05-04
Also published as: CN114104108A

Abstract

A vehicle chassis structure, comprising a structural frame, wherein an upper side of the structural frame is provided with a closing plate (3), and an upper side face of the closing plate (3) is provided with an equipment mounting frame; the structural frame comprises two bearing beams (5), which are arranged in parallel, and the two bearing beams (5) are connected by means of a plurality of fixing beams (52); the closing plate (3) is attached to an upper side face of each bearing beam (5); the equipment mounting frame comprises a rectangular frame (12), which is arranged on an upper side of the closing plate (3), and at least two longitudinal rods (11), which are arranged in parallel, are provided in the rectangular frame (12); and a plurality of transverse rods (14) are provided between the rectangular frame (12) and the longitudinal rod (11) adjacent to same and between two adjacent longitudinal rods (11), so as to cooperate with the longitudinal rods (11) to divide a region defined by the rectangular frame (12) into multiple mounting regions (16), and equipment fixing components are provided in the mounting regions (16). The vehicle chassis structure has a certain universality, and is applicable to the production and use of vehicles of different models. In addition, the structure is stable, the deformation degree of the bearing beams (5) can be monitored, and the safety is high.

Description

A chassis structure suitable for new energy vehicles

technical field

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

Background technique

The traditional car chassis is mainly composed of four parts: transmission system, driving system, steering system and brake system. Its main function is to support and install various parts of the car, shape the overall shape of the car and receive the power of the engine to make the car move and ensure normal operation. Driving is an important part of the car structure. At present, the transmission forms of automobiles mainly include mechanical transmission, hydraulic transmission, hydraulic transmission and electric transmission, etc. Different transmission forms correspond to different power systems, which are reflected in different installation structures on the chassis. Therefore, solving the generality problem of automobile chassis has just become one of the key points that people pay close attention to.

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

1. Deformation damage, because the car chassis needs to carry many car components during use, so that after long-term use, there will be a certain degree of structural deformation, and even the main load-bearing parts will break, which will affect driving safety;

2. Corrosion, the acid pollution in the air causes the acidity of rainwater to increase, and the chassis of a car made of metal is prone to corrosion damage under the action of acid rainwater. contact, and the sewage on the road contains oily substances, which will also corrode the chassis of the car to a certain extent.

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

The Chinese patent with the publication number CN111422258A discloses a car chassis structure, including a vehicle frame, a water tank mounting frame, a first driving mechanism mounting frame, a second driving mechanism mounting frame, a control mechanism mounting frame and a plurality of power supply mechanism mounting frames; The vehicle 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 frame and the second driving mechanism mounting frame installed in the lower side of the second area in sequence; the installation frame of the control mechanism and the installation frame of the water tank are installed in the upper side of the second area in sequence; the plurality of installation frames of the power supply mechanism are symmetrically installed in the In the lower side of the first area and the third area.

However, the above-mentioned patent only uses the horizontal and vertical bars to form the chassis frame of the car, so that most of the space under the chassis of the car is exposed, and the above-mentioned problem of chassis damage inevitably occurs, and the safety is not high. At the same time, in order to adapt to fuel drive and electric drive , the first driving mechanism mounting frame and the second driving mechanism mounting frame are set correspondingly, which increases the processing difficulty and affects the processing efficiency.

Contents of the invention

The purpose of the present invention is to overcome the shortcomings of the prior art and provide a chassis structure suitable for new energy vehicles.

The purpose of the present invention is achieved through the following technical solutions: a car chassis structure, including a structural frame, the upper side of the structural frame is configured with a closing plate, and the upper side of the closing plate is configured with an equipment mounting frame; the structural frame includes Two load-bearing beams arranged in parallel, connected by a plurality of fixed beams between the two load-bearing beams; the closed plate is attached to the upper side of the load-bearing beam; the equipment mounting frame includes a A rectangular frame, at least two vertical bars arranged in parallel are arranged in the rectangular frame; multiple horizontal bars are arranged between the rectangular frame and its adjacent vertical bars, and between two adjacent vertical bars for matching the longitudinal bars. The rod divides the area defined by the rectangular frame into a plurality of installation areas, and equipment fixing components are arranged in the installation areas.

Preferably, the equipment fixing assembly includes a part ring arranged on the side of the closing plate, a fixing plate is arranged inside the part ring, and the fixing plate is connected to the closing plate through a support plate; the fixing plate A plurality of longitudinal screw holes are provided through, and the inner wall of the longitudinal screw holes is provided with a plurality of horizontal screw holes extending along the extending direction of the longitudinal screw holes; the fixing plate is distributed in the area defined by the part ring Inside.

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

Preferably, the lower side of the closing plate is integrally configured with a first flange, and the inner side of the first flange is attached to the load-bearing beam; the load-bearing beam and the first flange connected by the first bolt.

Preferably, a protective plate is arranged on the lower side of the structural frame, and a second flange is integrally formed on the upper side of the protective plate, and the inner side of the second flange is slidably fitted to the load-bearing beam A plurality of adjustment holes are provided through the second flange, and second bolts are pierced in the adjustment holes, and the second bolts are screwed to the corresponding load-bearing beams and are slidably connected to the adjustment holes.

Preferably, the adjustment hole is a waist hole.

Preferably, a pressure plate is arranged on the upper side of the protection plate, and the pressure plate is distributed between the protection plate and the load-bearing beam; the distance between the protection plate and the pressure plate extends along the length direction of the load-bearing beam A plurality of springs are provided, one end of the spring is connected to the protection plate, and the other end is connected to the pressure plate; when the second flange is slidably fitted to the load beam, the pressure plate and the The underside of the load beam fits and compresses the spring.

Preferably, the load-bearing beam is in the shape of a cuboid, a laser emitter is disposed in the middle of the load-bearing beam in the longitudinal direction, and a laser sensing module is disposed at the end of the load-bearing beam, and the laser emitter and the laser sensing module are positioned at On the same straight line; also includes 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 to the central processing unit, and the laser sensing module is connected to the central processing unit The data analysis system is electrically connected.

Preferably, two adjacent fixed beams are connected by a plurality of reinforcement beams; the reinforcement beams are in the shape of a hollow cuboid, and the inner cavity of the reinforcement beams is provided with a reinforcement plate with a cross-section in the shape of a "cross".

Preferably, a plurality of the longitudinal screw holes are equidistantly distributed, and a plurality of horizontal screw holes are equidistantly distributed; the extending direction of the longitudinal screw holes is perpendicular to the extending direction of the horizontal screw holes.

The present invention has the following advantages:

(1) The equipment mounting frame provided by the present invention cooperates with the equipment fixing assembly to fix and install the auto parts, and the closing plate is used to separate the load-bearing beam and the auto equipment. On the one hand, it provides a suitable installation environment for the installation of the equipment; The equipment plays a protective role to prevent damage to the car equipment, and the upper side of the closing plate is divided into multiple installation areas through the cooperation between the rectangular frame, the cross bar and the longitudinal bar. In practice, the installation area can be reasonably used according to the specific model, and in It is only necessary to configure the equipment fixing components in the corresponding installation area, which realizes the common use of the chassis to a certain extent, and can set the equipment fixing components in all installation areas, which can be used reasonably during use; the structural guarantee of the load-bearing beam and the fixed beam the strength of the chassis.

(2) The fixed plate provided by the present invention is used to support the automobile equipment, and the multiple vertical screw holes and the multiple horizontal screw holes provided are used to fix the automobile equipment on the fixed plate by bolts, and the multiple vertical screw holes and the multiple horizontal screw holes The layout of the two horizontal screw holes facilitates the adjustment of the bolt installation position, so that the fixing plate can be installed with various types of automobile equipment, which is conducive to improving the versatility of the automobile chassis;

(3) The part ring provided by the present invention can fix the small parts spilled within its range when the automobile equipment is disassembled, so as to prevent the small parts from being lost.

(4) The protective plate provided by the present invention cooperates with the second flange to form a closed structure below the structural frame, which can effectively isolate the structural frame, that is, isolate the load-bearing beams from contact with accumulated water, so that the structural frame can be prevented from being corroded, and it is beneficial to extend The service life of the car chassis.

(5) The pressure plate provided in the present invention cooperates with the spring to form a buffer for the protection plate, thereby prolonging the service life of the protection plate.

(6) The laser sensing module provided by the present invention is used to monitor the position change of the laser beam emitted by the laser transmitter, thereby judging whether the load-bearing beam is bent and deformed, and cooperates with the central processing unit, data analysis system, terminal and alarm module to realize the real-time monitoring of the load-bearing beam , which can help the driver to grasp the deformation of the load-bearing beam, which is conducive to safe driving.

Description of drawings

Fig. 1 is the preferred three-dimensional structure schematic diagram of the present invention;

Fig. 2 is the preferred top view structure schematic diagram of the present invention;

Fig. 3 is the sectional structure schematic diagram of E-E section in Fig. 2;

Fig. 4 is a partial enlarged schematic diagram of the structure at A in Fig. 1;

Fig. 5 is the partially enlarged schematic view of the structure at B place in Fig. 1;

Figure 6 is a partially enlarged schematic diagram of the structure at C in Figure 3;

Figure 7 is a partially enlarged schematic diagram of the structure at D in Figure 3;

Fig. 8 is a schematic diagram of a preferred bottom-view structure of the present invention;

Fig. 9 is a schematic view of the structure viewed from above after the protective plate is removed in the present invention;

Fig. 10 is the structural representation of the cross-section of reinforced beam in the present invention;

Fig. 11 is a schematic diagram of the connection structure of the central processing unit, the laser sensing module, the data analysis system, the alarm module and the terminal in the present invention.

In the figure, 11-longitudinal bar, 12-rectangular frame, 13-reinforcing bar, 14-horizontal bar, 15-support bar, 16-installation area, 2-fixing plate, 21-longitudinal screw hole, 22-horizontal screw hole, 23-support plate, 24-part ring, 3-closed plate, 31-first flange, 32-first bolt, 4-protection plate, 41-second flange, 42-spring, 43-pressure plate, 44- Adjustment hole, 45-anti-collision ball, 5-load-bearing beam, 51-second bolt, 52-fixed beam, 53-reinforced beam, 531-reinforced plate, 61-laser sensor module, 62-laser transmitter, 700-data Analysis system, 710-central processing unit, 720-alarm module, 730-terminal.

Detailed ways

The present invention will be further described below in conjunction with accompanying drawing, protection scope of the present invention is not limited to the following:

As shown in Fig. 1 to Fig. 11, the present application provides an automobile chassis structure, including a structural frame, 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 of the closing plate 3. In this embodiment, as shown in Figure 9, the structural frame includes two load-bearing beams 5 arranged in parallel, and the two load-bearing beams 5 are connected by a plurality of fixed beams 52; . Preferably, the shown fixed beam 52 is welded to the bearing beam 5 . As shown in Fig. 1, Fig. 2, Fig. 3 and Fig. 4, the equipment mounting frame includes a rectangular frame 12 arranged on the upper side of the closing plate 3, and at least two longitudinal bars 11 arranged in parallel are arranged in the rectangular frame 12; 12 and its adjacent longitudinal bars 11, and a plurality of cross bars 14 are arranged between two adjacent longitudinal bars 11, which are used to cooperate with the longitudinal bars 11 to divide the area defined by the rectangular frame 12 into multiple installation areas. 16. The installation area 16 is equipped with equipment fixing components. Here, the equipment mounting frame cooperates with the equipment fixing component to fix and install the auto parts. Such as car water tank, engine and battery pack, etc. In this embodiment, the closing plate 3 is used to separate the load-bearing beam 5 from the automobile equipment, on the one hand, it provides a suitable installation environment for equipment installation, and on the other hand, it can protect the automobile equipment and prevent the automobile equipment from being damaged. Here, the upper side of the closing plate 3 is divided into a plurality of installation areas 16 by the cooperation between the rectangular frame 12, the cross bar 14 and the longitudinal bar 11. It is enough to configure the equipment fixing components inside, which realizes the universality of the chassis to a certain extent. In order to be more universal, the equipment fixing components can be installed in all the installation areas 16, and can be used rationally during use. The structure in which the load-bearing beam 5 cooperates with the fixed beam 52 ensures the strength of the chassis.

Further, as shown in Figure 4, the equipment fixing assembly includes a part ring 24 arranged on the upper side of the closing plate 3, the part ring 24 is equipped with a fixing plate 2, and the fixing plate 2 is connected with the closing plate 3 through a support plate 23; the fixing plate 2 is provided with a plurality of vertical screw holes 21, and the inner wall of the vertical screw hole 21 is provided with a plurality of horizontal screw holes 22 in a manner extending along the extension direction of the longitudinal screw hole 21; the fixing plate 2 is distributed in the area defined by the part ring 24 Inside. In this embodiment, the fixing plate 2 is used to support the automobile equipment, and a plurality of vertical screw holes 21 and a plurality of horizontal screw holes 22 are provided for fixing and installing the automobile equipment on the fixing plate 2 through bolts. Preferably, a plurality of longitudinal screw holes 21 are equidistantly distributed, and a plurality of horizontal screw holes 22 are equidistantly distributed. The extending direction of the vertical screw hole 21 is perpendicular to the extending direction of the horizontal screw hole 22 . The layout of multiple vertical screw holes 21 and multiple horizontal screw holes 22 facilitates the adjustment of bolt installation positions, so that the fixing plate 2 can be installed with various types of automotive equipment, which is conducive to improving the versatility of the automotive chassis. In some embodiments, the part ring 24, the supporting plate 23 and the fixing plate 2 are integrated together, that is, the equipment fixing assembly is an independent unit, which is fixed on the closing plate 3, which is convenient for the processing and production of the automobile chassis, and has a high degree of integration. It is beneficial to improve the processing efficiency, increase the interchangeability between accessories, and save costs. In this embodiment, the component ring 24 is in the shape of a closed square frame. In other embodiments, the component ring 24 can also be any other closed ring shape. Parts ring 24 here can fix the small parts spilled in its range when the automotive equipment is disassembled, preventing small parts from being lost.

As shown in FIG. 1 and FIG. 3 , the rectangular frame 12 is connected to the closing plate 3 through a plurality of support rods 15 , and reinforcing rods 13 are arranged between two adjacent support rods 15 distributed along the length direction of the rectangular frame 12 . Here, a triangular junction is formed between the reinforcing rod 13, the supporting rod 15 and the rectangular frame 12, which increases the stability.

In this embodiment, as shown in Figure 3 and Figure 6, the lower side of the closure plate 3 is configured with a first flange 31 in an integrated manner, and the inner side of the first flange 31 is attached to the load-bearing beam 5; the load-bearing beam 5 and the first flange 31 are connected by first bolts 32. When in use, the closure plate 3 can be buckled directly on the load-bearing beam 5 , and then the first bolt 32 can be used to penetrate the first flange 31 and be embedded into the load-bearing beam 5 to realize the installation of the closure plate 3 .

In this embodiment, in order to protect the main structure of the chassis of the automobile from being corroded by acidic rainwater (water accumulation) or oily sewage, as shown in Figure 1, Figure 3, Figure 6 and Figure 8, the lower side of the structure frame is equipped with a protective plate 4 A second flange 41 is integrally formed on the upper side of the protective plate 4 , and the inner side of the second flange 41 is slidably attached to the load-bearing beam 5 . A plurality of adjustment holes 44 are formed through the second flange 41 , and second bolts 51 are penetrated in the adjustment holes 44 , and the second bolts 51 are screwed to the corresponding load beams 5 and are slidably connected to the adjustment holes 44 . Here, the protective plate 4 cooperates with the second flange 41 to form a closed structure below the structural frame, which can effectively isolate the structural frame, that is, isolate the load-bearing beam 5, etc. from contact with accumulated water, so that the structural frame can be prevented from being corroded, and it is beneficial to extend the chassis of the car. service life. The adjusting hole 44 here can be used to adjust the installation height of the protective plate 4 . Further, the adjustment hole 44 is a waist-shaped hole.

Further, as shown in Fig. 3, Fig. 6 and Fig. 7, a pressure plate 43 is arranged on the upper side of the protection plate 4, and the pressure plate 43 is distributed between the protection plate 4 and the load-bearing beam 5; between the protection plate 4 and the pressure plate 43 to The load-bearing beam 5 is provided with a plurality of springs 42 extending in the longitudinal direction, one end of the spring 42 is connected to the protection plate 4, and the other end is connected to the pressure plate 43; The spring 42 is attached to the lower side of the load-bearing beam 5 and compressed. Here, the pressing plate 43 cooperates with the spring 42 to form a buffer for the protection plate 4 . For example, when driving on a gravel road section, the crushed stones will be crushed by the wheels, and this part of the gravel will impact the protection plate 4. At this time, the compression of the spring 42 can absorb the impact of the gravel, thereby prolonging the service life of the protection plate 4. In this embodiment, several anti-collision balls 45 equidistantly and evenly distributed are arranged on the lower side of the protective plate 4 . The anti-collision ball 45 here is in a hemispherical shape, and is used to change the flight direction of gravel and increase the structural strength of the protective plate 4 simultaneously.

In this embodiment, as shown in Fig. 3, Fig. 6, Fig. 7, Fig. 9 and Fig. 11, the load-bearing beam 5 is in the shape of a cuboid, and a laser emitter 62 is arranged in the middle of the load-bearing beam 5 in the longitudinal direction. The end is equipped with a laser sensor module 61, and the laser emitter 62 is on the same straight line as the laser sensor module 61; it also includes 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 The analysis system 700 is electrically connected to the central processing unit 710 , and the laser sensing module 61 is electrically connected to the data analysis system 700 . The laser sensing module 61 here may be a PSD position sensor module, which is used to monitor the position change of the laser emitted by the laser emitter 62, so as to determine whether the load-bearing beam 5 is bent or deformed. The terminal 730 may be any one of a vehicle display, a mobile phone or a tablet computer. The alarm module 720 can be integrated in the terminal 730, just a voice alarm. When in use, the laser emitter 62 emits a straight-line laser beam to the laser sensing module 61 arranged on the same straight line. At this time, the laser sensing module 61 determines the spot position coordinates as the initial position coordinates and stores them in the data analysis system 700. When the beam 5 bends, the position of the laser emitter 62 relative to the laser sensing module 61 changes, that is, the position of the spot irradiated on the laser sensing module 61 changes, and the laser sensing module 61 inputs the coordinates of the current spot position into the data analysis system 700 And compared with the initial position coordinates, the deformation amount is judged, and the deformation data is transmitted to the terminal 730 through the central processing unit 710 at the same time, so that the driver can grasp the vehicle condition. In addition, the extreme value of the deformation of the load-bearing beam 5 is stored in the data analysis system 700. When the deformation exceeds the extreme value, the central processing unit 710 receives the data from the data analysis system 700 and outputs a signal to the alarm module 720, prompting the driver to overhaul vehicle.

As shown in Figure 10, two adjacent fixed beams 52 are connected by a plurality of reinforcing beams 53; the reinforcing beams 53 are in the shape of a hollow cuboid, and the inner cavity of the reinforcing beams 53 is provided with a reinforcing plate with a cross section in the shape of a "cross" 531. Reinforcing beams 53 can further increase the strength of the chassis. The hollow reinforcing beam 53 helps reduce weight, and the reinforcing plate 531 can increase the strength of the reinforcing beam 53 .

Finally, it should be noted that: the above is only a preferred embodiment of the present invention, and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, it still The technical solutions recorded in the foregoing embodiments may be modified, or some technical features thereof may be equivalently replaced. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

A kind of automobile chassis structure, it is characterized in that, comprises structural frame, and the upper side of this structural frame is equipped with closing plate (3), and the upper side of described closing plate (3) is equipped with equipment installation frame; Described structural frame comprises two Two load-bearing beams (5) arranged in parallel, are connected by a plurality of fixed beams (52) between the two described load-bearing beams (5); close; the equipment installation frame includes a rectangular frame (12) arranged on the upper side of the closed plate (3), and at least two longitudinal bars (11) arranged in parallel are configured in the rectangular frame (12); the rectangular frame (12) And its adjacent vertical bar (11), and a plurality of cross bars (14) are all arranged between adjacent two vertical bars (11), for cooperating vertical bar (11) described rectangular frame (12) The defined area is divided into a plurality of installation areas (16), and equipment fixing components are arranged in the installation areas (16).
The automobile chassis structure according to claim 1, characterized in that, the equipment fixing assembly includes a part ring (24) arranged on the upper side of the closing plate (3), and a fixing device is arranged in the part ring (24). plate (2), the fixed plate (2) is connected with the closed plate (3) through the support plate (23); the fixed plate (2) is provided with a plurality of longitudinal screw holes (21), the The inner wall of the longitudinal screw hole (21) is provided with a plurality of horizontal screw holes (22) in a manner extending along the extending direction of the longitudinal screw hole (21); the fixing plate (2) is distributed on the part ring (24 ) within the limited area.
The automobile chassis structure according to claim 1 or 2, characterized in that, the rectangular frame (12) is connected with the closing plate (3) through a plurality of support rods (15), and the length of the rectangular frame (12) is A reinforcing rod (13) is arranged between two adjacent supporting rods (15) distributed in directions.
The automobile chassis structure according to claim 3, characterized in that, the lower side of the closing plate (3) is integrally formed with a first flange (31), and the first flange (31) The inner surface is attached to the load-bearing beam (5); the load-bearing beam (5) is connected to the first flange (31) through first bolts (32).
The automobile chassis structure according to claim 1, characterized in that, a protective plate (4) is arranged on the underside of the structure frame, and a second flange is arranged on the upper side of the protective plate (4) in an integrated manner (41), the inner surface of the second flange (41) is slidingly fitted to the load-bearing beam (5); the second flange (41) is provided with a plurality of adjustment holes (44), the A second bolt (51) is pierced in the adjustment hole (44), and the second bolt (51) is screwed to the corresponding load-bearing beam (5) and is slidably connected to the adjustment hole (44).
The automobile chassis structure according to claim 5, characterized in that, the adjustment hole (44) is a waist-shaped hole.
The automobile chassis structure according to claim 6, characterized in that a pressure plate (43) is arranged on the upper side of the protection plate (4), and the pressure plate (43) is distributed between the protection plate (4) and the load-bearing beam (5); a plurality of springs (42) are arranged between the protection plate (4) and the pressure plate (43) in a manner extending along the length direction of the load-bearing beam (5), and the springs (42 ) is connected to the protective plate (4), and the other end is connected to the pressure plate (43); when the second flange (41) is slidably fitted with the load beam (5), the The pressing plate (43) is attached to the lower side of the bearing beam (5) and compresses the spring (42).
The automobile chassis structure according to claim 1, characterized in that, the load-bearing beam (5) is in the shape of a cuboid, and a laser emitter (62) is arranged in the middle of the longitudinal direction of the load-bearing beam (5), the load-bearing beam The end of (5) is equipped with a laser sensor module (61), and the laser emitter (62) is on the same straight line as the laser sensor module (61); it also includes 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 to the central processing unit (710), The laser sensing module (61) is electrically connected with the data analysis system (700).
The automobile chassis structure according to claim 1, wherein two adjacent fixed beams (52) are connected by a plurality of reinforcing beams (53); the reinforcing beams (53) are hollow cuboids, and the The inner cavity of the reinforcement beam (53) is provided with a reinforcement plate (531) with a cross-section in the shape of a "cross".
The automobile chassis structure according to claim 2, characterized in that, a plurality of said longitudinal screw holes (21) are equidistantly distributed, and a plurality of horizontal screw holes (22) are equidistantly distributed; said longitudinal screw holes (21) ) is perpendicular to the extension direction of the horizontal screw hole (22).