CN219134399U - Car body frame and electric car - Google Patents

Abstract

The application provides a car body frame and electric motor car relates to electric motor car accessory technical field. The vehicle body frame comprises a head pipe, a main beam pipe, two side pipes and two middle connecting plates, wherein one end of the main beam pipe is fixedly connected with the head pipe, and the other end of the main beam pipe is respectively and fixedly connected with the two side pipes; the side pipes comprise an upper side pipe and a lower side pipe which are arranged in a lamination manner and are respectively and fixedly connected to the same side of the main beam pipe; one end of the upper edge pipe is fixedly connected with the main beam pipe; the lower side pipe comprises a main pipe and a rear side pipe, the rear side pipe is fixedly connected to one end of the main pipe, which is far away from the main beam pipe, and one end of the upper side pipe, which is far away from the main beam pipe, is connected to the rear side pipe; the two middle connecting plates are respectively arranged at the joints of the main pipes of the two lower pipes and the rear pipe, and the middle connecting plates are positioned at one end of the rear pipe far away from the main beam pipe. The vehicle body frame assembly obtained through the design improves the consistency of the output and improves the production efficiency, stability and reliability of the electric vehicle.

Description

Car body frame and electric car

Technical Field

The application relates to the technical field of electric vehicle accessories, in particular to a vehicle body frame and an electric vehicle.

Background

Along with the improvement of the living standard of people and the acceleration of the living rhythm, the electric vehicle is more and more favored by modern people due to the convenience and environmental protection, the electric vehicle industry rises in China for only a few years, and in the short years, the electric vehicle industry is distributed from scratch to wide popularization, and high-speed development and great progress are achieved, wherein the installation of the frame has important influence on the production efficiency and the use safety of the electric vehicle.

At present, the frame on the market mainly adopts a welding structure of a round pipe and a punching part, the left lower pipe and the right lower pipe of the frame of the existing electric vehicle are usually formed by one-step bent pipe, and the pipe fitting is large, so that the storage and the transportation of materials are extremely inconvenient; and the precision of the bent pipe can not ensure the consistency of the bent pipe because the wall thickness and the material of the pipe change slightly during mass production, and the stability and the strength of the frame are easy to reduce.

Disclosure of Invention

The application provides a provide frame and electric motor car, aims at solving and proposes the problem that the side pipe one-time bend forming of frame leads to uniformity low, stability and intensity not good because among the prior art.

Embodiments of the present application are implemented as follows:

in one aspect of the embodiments of the present application, a vehicle body frame is provided, including a head pipe, a main beam pipe, two side pipes and two middle connecting plates, wherein one end of the main beam pipe is fixedly connected with the head pipe, the other end is respectively and fixedly connected with the two side pipes, and the two side pipes are respectively located at two opposite sides of the main beam pipe; the side pipes comprise an upper side pipe and a lower side pipe which are arranged in a lamination manner and are respectively and fixedly connected to the same side of the main beam pipe; one end of the upper edge pipe is fixedly connected with the main beam pipe, and the other end of the upper edge pipe is connected with one end of the lower edge pipe far away from the main beam pipe; the lower side pipe comprises a main pipe and a rear side pipe, one end of the main pipe is connected to the main pipe, the rear side pipe is fixedly connected to one end of the main pipe, which is far away from the main pipe, and one end of the upper side pipe, which is far away from the main pipe, is connected to the rear side pipe; the two middle connecting plates are respectively arranged at the joints of the main pipes of the two lower pipes and the rear pipe, and the middle connecting plates are positioned at one end of the rear pipe far away from the main beam pipe.

Optionally, the upper edge tube is a square tube, and the upper edge tube is uniformly provided with a plurality of hot melt holes, and the hot melt holes and the upper edge tube are integrally formed.

Optionally, the device further comprises a plurality of reinforcing plates, wherein the reinforcing plates are positioned between the upper side pipe and the lower side pipe, one side of each reinforcing plate is fixedly connected with the upper side pipe, and the other side of each reinforcing plate is fixedly connected with the lower side pipe.

Optionally, a middle connecting plate transverse tube is arranged between the middle connecting plates, and two ends of the middle connecting plate transverse tube are respectively and fixedly connected with the rear side tubes where the two middle connecting plates are positioned.

Optionally, one end of the rear pipe far away from the main pipe is respectively connected with a damping lifting lug, and the damping lifting lug is provided with a plurality of mounting holes for penetrating the fixing pieces.

Optionally, a rear tube transverse tube is further arranged between the two shock absorption lifting lugs, and two ends of the rear tube transverse tube are fixedly connected with the shock absorption lifting lugs respectively.

Optionally, a support horizontal pipe is further arranged between one ends of the two upper side pipes close to the rear side pipe, a support vertical pipe is vertically connected to the middle position of the support horizontal pipe, and a five-way pipe is connected to one end of the support vertical pipe, which is far away from the support horizontal pipe.

Optionally, a single support bracket is further arranged on the main pipe, and one end of the single support bracket is hinged to the main pipe and used for supporting the vehicle body.

Optionally, one end of the middle connecting plate far away from the main pipe is also provided with a rear foot rest support which is fixedly connected to the rear edge pipe where the middle connecting plate is located.

In another aspect of the embodiments of the present application, there is provided an electric vehicle including the vehicle body frame of any one of the above.

The beneficial effects of the embodiment of the application include: the vehicle body frame comprises a head pipe, a main beam pipe, two side pipes and two middle connecting plates, wherein one end of the main beam pipe is fixedly connected with the head pipe, the other end of the main beam pipe is respectively and fixedly connected with the two side pipes, and the two side pipes are respectively positioned on two opposite sides of the main beam pipe so as to provide enough supporting force for the head pipe through the main beam pipe; the side pipe comprises an upper side pipe and a lower side pipe which are arranged in a lamination mode and are respectively and fixedly connected to the same side of the main beam pipe of the electric vehicle, and the arrangement can enable the overall strength of the electric vehicle to be higher and the structure to be more stable; one end of the upper side pipe is fixedly connected with the main beam pipe, and the other end of the upper side pipe is connected with one end of the lower side pipe far away from the main beam pipe, so that the structure can not only enhance the overall stability of the frame, but also improve the space utilization rate of the frame structure and increase the pedal plate space; the two middle connecting plates are respectively arranged at the joint of the main pipe and the rear pipe of the two lower pipes, and the middle connecting plates are positioned at one end of the rear pipe far away from the main beam pipe, so that the lower pipes are disconnected by the middle connecting plates, the mass production consistency of the vehicle frame is improved, and the stability and the strength of the vehicle body frame are enhanced; the vehicle body frame assembly obtained through the design improves the consistency of the output and improves the production efficiency, stability and reliability of the electric vehicle.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered limiting the scope, and that other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of a frame side tube and an electric vehicle according to an embodiment of the present disclosure;

fig. 2 is a second schematic structural diagram of a frame side tube and an electric vehicle according to an embodiment of the present disclosure.

Icon: 100-a body frame; 110-head tube; 111-a hook bracket; 112-a wind shielding bracket; 113-a lock bracket; 114-horn support; 120-girder tube; 121-main beam tube reinforcing sheets; 130-edge tube; 131-upper side tube; 1311-a hot melt hole; 132-lower tube; 1321—a main pipe; 1322-rear side tube; 140-middle connecting plates; 141-middle connecting plate transverse pipes; 142-a rear foot rest support; 150-reinforcing plates; 160-a shock absorption lifting lug; 161-rear tube cross tube; 162-a stent cross tube; 163-rack standpipe; 164-five-way pipe; 165-single stent.

Detailed Description

For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some, but not all, embodiments of the present application. The modules of the embodiments of the present application, which are generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

In the description of the present application, it should be understood that terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are merely for convenience in describing the present utility model and simplifying the description, rather than indicating or implying that the apparatus or elements being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present utility model.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In this application, unless specifically stated and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

Referring to fig. 1 and 2, a vehicle body frame 100 is provided, which includes a head pipe 110, a main beam pipe 120, two side pipes 130 and two middle connecting plates 140, wherein one end of the main beam pipe 120 is fixedly connected with the head pipe 110, the other end is respectively and fixedly connected with the two side pipes 130, and the two side pipes 130 are respectively positioned at two opposite sides of the main beam pipe 120; the side tube 130 includes an upper side tube 131 and a lower side tube 132, and the upper side tube 131 and the lower side tube 132 are stacked and fixedly connected to the same side of the main beam tube 120 respectively; one end of the upper edge tube 131 is fixedly connected to the main beam tube 120, and the other end is connected to one end of the lower edge tube 132, which is far away from the main beam tube 120; the lower tube 132 comprises a main tube 1321 and a rear tube 1322, wherein one end of the main tube 1321 is connected to the main beam tube 120, the rear tube 1322 is fixedly connected to one end of the main tube 1321 far away from the main beam tube 120, and one end of the upper tube 131 far away from the main beam tube 120 is connected to the rear tube 1322; the two middle connecting plates 140 are respectively arranged at the joints of the main pipe 1321 and the rear pipe 1322 of the two lower pipes 132, and the middle connecting plates 140 are positioned at one end of the rear pipe 1322 far away from the main beam pipe 120.

Specifically, the vehicle body frame 100 includes a head pipe 110, a main beam pipe 120, two side pipes 130 and two middle connecting plates 140, wherein one end of the main beam pipe 120 is fixedly connected with the middle position of the head pipe 110, and is used for supporting the head pipe 110 to a certain extent; the other ends are fixedly connected with the two side pipes 130 respectively, and the two side pipes 130 are positioned on two opposite sides of the main beam pipe 120 respectively; the side tube 130 comprises an upper side tube 131 and a lower side tube 132, wherein the upper side tube 131 and the lower side tube 132 are stacked, and the lower side tube 132 is fixed below the upper side tube 131; the upper side pipe 131 and the lower side pipe 132 are symmetrically disposed at the left and right sides of the main beam pipe 120. One end of the upper edge tube 131 is fixedly connected to the main beam tube 120, and the other end is connected to one end of the lower edge tube 132, which is far away from the main beam tube 120, so that the upper edge tube 131 and the lower edge tube 132 are connected into an integrated structure; the lower tube 132 includes a main tube 1321 and a rear tube 1322, the main tube 1321 is parallel to the upper tube 131, one end of the main tube 1321 is fixedly connected with the main tube 120, one end of the rear tube 1322 is fixedly connected with one end of the main tube 1321 away from the main tube 120, and the other end extends in a direction close to the upper tube 131. One end of the upper edge tube 131 is fixedly connected with the main beam tube 120, and the other end is connected with the rear edge tube 1322; the middle connecting plate 140 is fixedly connected to the connection part between the main pipe 1321 and the rear pipe 1322 of the lower pipe 132, and the middle connecting plate 140 is located at one end of the rear pipe 1322 away from the main beam pipe 120.

It should be noted that, in the first embodiment of the present application, the head pipe 110 is further provided with a hook bracket 111, a wind shielding bracket 112, a lock bracket 113 and a horn bracket 114; these parts are fixedly connected to the head pipe 110 and are respectively connected with the rest of the electric vehicle accessories to play the roles of installing hooks, wind shields, sleeve locks, horns and the like, so that the functional diversity of the electric vehicle is improved, and meanwhile, the use experience of riders is improved.

Second, in this embodiment of the present application, the one end of girder pipe 120 is fixed with the central point of head pipe 110, has welded girder pipe reinforcement piece 121 in the junction of head pipe 110 and girder pipe 120, through the setting of this girder pipe reinforcement piece 121, can make girder pipe 120 and head pipe 110's relation of connection more stable, has strengthened the joint strength of head pipe 110 and girder pipe 120 simultaneously, has improved the security of riding process.

Third, in the embodiment of the application, the upper side pipe 131 and the lower side pipe 132 are connected into an integral structure, and one ends of the upper side pipe 131 and the lower side pipe 132 are fixedly connected with the main beam pipe 120, so that the three are fixedly connected into a whole, and the stability of the electric vehicle is further improved.

Fourth, in the embodiment of the present application, the middle connecting plate 140 is provided with two groups of nameplate holes, wherein the positions of the nameplate holes can be selected according to the appearance change of the plastic part; one of the two groups of nameplate holes is a bottom fork and double-support mounting and fixing hole, and the other group of nameplate holes is a bottom bracket locking point and a foot rest bracket mounting hole; the design requirements of different vehicle types can be met, and the universal rate of the frame platform is improved.

The vehicle body frame 100 provided in the embodiment of the present application includes a head pipe 110, a main beam pipe 120, two side pipes 130 and two middle connecting plates 140, wherein one end of the main beam pipe 120 is fixedly connected with the head pipe 110, the other end is respectively fixedly connected with the two side pipes 130, and the two side pipes 130 are respectively located at opposite sides of the main beam pipe 120, so as to provide sufficient supporting force for the head pipe 110 through the main beam pipe 120; the side tube 130 comprises an upper side tube 131 and a lower side tube 132, the upper side tube 131 and the lower side tube 132 are in laminated arrangement and are respectively and fixedly connected to the same side of the main beam tube 120 of the electric vehicle, and the arrangement can enable the overall strength of the electric vehicle to be higher and the structure to be more stable; one end of the upper side pipe 131 is fixedly connected to the main beam pipe 120, and the other end is connected to one end of the lower side pipe 132, which is far away from the main beam pipe 120, so that the structure can not only enhance the overall stability of the frame, but also improve the space utilization rate of the frame structure and increase the pedal plate space; the two middle connecting plates 140 are respectively arranged at the joint of the main pipe 1321 and the rear pipe 1322 of the two lower pipes 132, and the middle connecting plates 140 are positioned at one end of the rear pipe 1322 far away from the main beam pipe 120, so that the lower pipes 132 are disconnected by the middle connecting plates 140, the mass production consistency of the frame is improved, the stability and the strength of the vehicle body frame 100 are enhanced, and the effect of supporting a battery can be also achieved; the above-designed body frame 100 is assembled with improved uniformity of yield, and improved productivity, stability and reliability of the electric vehicle.

As shown in fig. 2, the upper tube 131 is a square tube, and the upper tube 131 is uniformly provided with a plurality of heat-melting holes 1311, and the heat-melting holes 1311 and the upper tube 131 are integrally formed.

Specifically, the upper tube 131 is a square tube, and a plurality of hot-melt holes 1311 are uniformly distributed on the upper tube 131, and the hot-melt holes 1311 are formed by one-step processing while the upper tube 131 is produced, and internal threads are correspondingly arranged in the holes, so that the connection bolts are fixed through the hot-melt holes 1311, and the battery pressing bar and the battery supporting bar of the electric vehicle are stably fixed on the vehicle frame through the hot-melt holes 1311.

The hot melt hole 1311 is formed on the upper edge pipe 131 in one-step processing in the production process, so that the precision is high, the deformation is avoided, and a punching die is not required; the hot melt hole 1311 does not need to spot weld a step nut or use a blind rivet nut, so that the production process has the advantages of high production efficiency, manufacturing material saving and the like. Because the hot melt hole 1311 is processed without spot welding a step nut or a blind rivet nut, the shape of the upper edge tube 131 is very flat after the bolt is installed, and no sharp object exists; in the subsequent processing process, the main wire harness arranged by the electric vehicle is not easy to be scratched or cut by a sharp object, so that the use reliability of the electric vehicle is greatly improved, and the service life of the electric vehicle is prolonged.

In one embodiment of the present application, as shown in fig. 2, the vehicle body frame 100 further includes a plurality of reinforcing plates 150, and the plurality of reinforcing plates 150 are located between the upper side tube 131 and the lower side tube 132, and have one side fixedly connected to the upper side tube 131 and the other side fixedly connected to the lower side tube 132.

Specifically, the frame side tube 130 further includes a plurality of reinforcing plates 150, the plurality of reinforcing plates 150 are uniformly distributed between the upper side tube 131 and the lower side tube 132, and opposite sides of the reinforcing plates 150 are fixedly connected with the upper side tube 131 and the lower side tube 132, respectively; a reinforcing hole is further provided at a central position of each reinforcing plate 150 to further enhance the strength of the reinforcing plate 150. Through the arrangement of the reinforcing plate 150, the function of supporting the connection of the upper side pipe 131 and the lower side pipe 132 is played, and meanwhile, the strength of the frame side pipe 130 is further improved, and the stability of the frame side pipe 130 is enhanced.

In one embodiment of the present application, as shown in fig. 2, a middle connecting plate transverse tube 141 is further disposed between the middle connecting plates 140, and two ends of the middle connecting plate transverse tube 141 are respectively and fixedly connected with the rear side tubes 1322 where the two middle connecting plates 140 are located.

Specifically, the middle connecting plate transverse tube 141 is further arranged between the two middle connecting plates 140, two ends of the middle connecting plate transverse tube 141 are fixedly connected with the rear side tube 1322 where the middle connecting plates 140 are located respectively, the two middle connecting plates 140 and the middle connecting plate transverse tube 141 are fixedly connected into an integral structure, the connecting strength between the middle connecting plates 140 is better through the arrangement of the middle connecting plate transverse tube 141, the stability of connection is improved, the consistency and the stability of mass production of a frame are improved, and two locking points can be provided for a seat barrel, so that the metal plate of a seat barrel bracket can be reduced in the installation process, the design requirements of different vehicle types can be met, and the storage space in the up-down direction of materials can be increased.

For example, as shown in fig. 1, one end of the rear tube 1322 away from the main tube 1321 is further connected with a shock-absorbing lifting lug 160, and the shock-absorbing lifting lug 160 is provided with a plurality of mounting holes for respectively penetrating the fixing pieces.

Specifically, the two rear side pipes 1322 are also respectively connected with a shock-absorbing lifting lug 160, and the shock-absorbing lifting lug 160 is connected to one end of the rear side pipe 1322 far away from the main pipe 1321; be equipped with a plurality of mounting holes on the shock attenuation lug 160, wear to be equipped with the mounting in the mounting hole, can make the other accessory interconnect of shock attenuation lug 160 and electric motor car through the mounting, strengthened the connection cooperation relation of each part. Through the setting of shock attenuation lug 160, make this electric motor car can reduce jolting, the impact that the collision brought to automobile body frame 100 at the in-process of riding, improved the stability and the reliability of the process of riding.

For example, as shown in fig. 2, a rear tube transverse tube 161 is further disposed between the two shock-absorbing lifting lugs 160, and two ends of the rear tube transverse tube 161 are fixedly connected to the shock-absorbing lifting lugs 160 respectively.

Specifically, the vehicle body frame 100 is further provided with a rear tube transverse tube 161, the rear tube transverse tube 161 is disposed between the two shock-absorbing lifting lugs 160, and two ends of the rear tube transverse tube 161 are fixedly connected to the two shock-absorbing lifting lugs 160 respectively. Through the setting of the horizontal pipe 161 of the back pipe, both play the back pipe 1322 support reinforcement effect about, can replace traditional seat bucket and jam plate support again, can also provide a plurality of lock points for backplate connecting plate and national standard back clothes hanger simultaneously, improved the general purpose rate of platform, play a multi-purpose effect of a pipe, reduced the waste of tubular product panel.

For example, as shown in fig. 1, a bracket horizontal tube 162 is further disposed between one ends of the two upper side tubes 131 close to the rear side tube 1322, the bracket horizontal tube 162 is disposed between one ends of the two upper side tubes 131 close to the rear side tube 1322, a bracket vertical tube 163 is vertically connected to the bracket horizontal tube 162, and a five-way tube 164 is connected to one end of the bracket vertical tube 163 far from the bracket horizontal tube 162.

Specifically, the vehicle body frame 100 further includes a bracket horizontal tube 162, where the bracket horizontal tube 162 is fixedly disposed at one end of the upper side tube 131 near the rear side tube 1322 and is fixedly connected between the two upper side tubes 131; a bracket standpipe 163 is vertically connected to the bracket horizontal tube 162, and the bracket standpipe 163 is vertically arranged with the bracket horizontal tube 162, wherein one end of the bracket standpipe 163 far away from the bracket horizontal tube 162 is connected with a five-way tube 164.

Through the setting of support standpipe 163 and support violently managing 162, can make five-way pipe 164 be connected as an organic whole structure with the limit pipe steadily to the installation of put the motor in five-way pipe 164 axis department has improved the connection stability and the reliability of this electric motor car.

For example, as shown in fig. 1, a single support bracket 165 is further provided on the main pipe 1321, and one end of the single support bracket 165 is hinged to the main pipe 1321 for supporting the vehicle body.

Specifically, the main pipe 1321 at one side of the lower pipe 132 is further provided with a single support bracket 165, and one end of the single support bracket 165 is hinged to the main pipe 1321, so that the effect of supporting the vehicle body and canceling the supporting can be achieved through the left-right movement of the single support bracket 165. Through the arrangement of the single support 165, the electric vehicle has a certain supporting force in the parking process, so that the parking process of the electric vehicle is safer and more reliable.

For example, as shown in fig. 1, a rear footrest support 142 is further disposed at an end of the middle connecting plate 140 away from the main pipe 1321, and the rear footrest support 142 is fixedly connected to a rear tube 1322 where the middle connecting plate 140 is located.

Specifically, the end of the middle connecting plate 140 far away from the main pipe 1321 is provided with a rear leg rest support 142, the middle connecting plate 140 is provided with a nameplate hole, and a fixing piece can be penetrated, so that the rear leg rest support 142 is fixed at one end of the middle connecting plate 140 and fixedly connected with the rear pipe 1322. Through the setting of back bracket support 142, can make the electric motor car receive certain holding power at the in-process of parking, make the parking process of electric motor car have stability and security more.

In one possible embodiment of the present application, as shown in fig. 1, there is provided an electric vehicle (not shown in the drawings) including the vehicle body frame 100 as any one of the above.

Specifically, the body frame 100 can be connected to other components of the electric vehicle. The structure and advantages of the vehicle body frame 100 are described in detail above, and are not repeated here.

The foregoing is merely exemplary embodiments of the present application and is not intended to limit the scope of the present application, and various modifications and variations may be suggested to one skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims (10)

1. The vehicle body frame is characterized by comprising a head pipe, a main beam pipe, two side pipes and two middle connecting plates, wherein one end of the main beam pipe is fixedly connected with the head pipe, the other end of the main beam pipe is respectively and fixedly connected with the two side pipes, and the two side pipes are respectively positioned on two opposite sides of the main beam pipe; the side pipes comprise an upper side pipe and a lower side pipe which are arranged in a lamination manner and are respectively and fixedly connected to the same side of the main beam pipe; one end of the upper edge pipe is fixedly connected to the main beam pipe, and the other end of the upper edge pipe is connected to one end, far away from the main beam pipe, of the lower edge pipe; the lower side pipe comprises a main pipe and a rear side pipe, one end of the main pipe is connected to the main beam pipe, the rear side pipe is fixedly connected to one end of the main pipe, which is far away from the main beam pipe, and one end of the upper side pipe, which is far away from the main beam pipe, is connected to the rear side pipe; the two middle connecting plates are respectively arranged at the joints of the main pipe and the rear pipe of the lower pipe, and the middle connecting plates are positioned at one end of the rear pipe far away from the main beam pipe.

2. The vehicle body frame according to claim 1, wherein the upper side pipe is a square pipe, and a plurality of hot melt holes are uniformly distributed on the upper side pipe, and the hot melt holes and the upper side pipe are integrally formed.

3. The body frame of claim 1, further comprising a plurality of reinforcement plates positioned between the upper side tube and the lower side tube and having one side fixedly connected to the upper side tube and the other side fixedly connected to the lower side tube.

4. The vehicle body frame according to claim 1, wherein a middle joint plate cross pipe is further provided between the two middle joint plates, and both ends of the middle joint plate cross pipe are fixedly connected with rear edge pipes where the two middle joint plates are located, respectively.

5. The vehicle body frame according to claim 1, wherein the ends of the rear side pipes away from the main pipe are respectively connected with shock-absorbing lifting lugs, and the shock-absorbing lifting lugs are provided with a plurality of mounting holes for respectively penetrating the fixing pieces.

6. The vehicle body frame according to claim 5, wherein a rear side pipe cross pipe is further provided between the two shock-absorbing lifting lugs, and both ends of the rear side pipe cross pipe are fixedly connected to the shock-absorbing lifting lugs, respectively.

7. The vehicle body frame according to claim 1, wherein a bracket horizontal pipe is further arranged between one ends of the two upper side pipes, which are close to the rear side pipe, a bracket vertical pipe is vertically connected to the middle position of the bracket horizontal pipe, and a five-way pipe is connected to one end of the bracket vertical pipe, which is far away from the bracket horizontal pipe.

8. The vehicle body frame according to claim 1, wherein a single support bracket is further provided on the main pipe, and one end of the single support bracket is hinged to the main pipe for supporting the vehicle body.

9. The vehicle body frame according to claim 1, wherein an end of the center yoke plate remote from the main pipe is further provided with a rear foot rest support fixedly connected to the rear side pipe where the center yoke plate is located.

10. An electric vehicle comprising a vehicle body frame as claimed in any one of claims 1 to 9.

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