CN221293952U - Electric vehicle frame - Google Patents

Abstract

The utility model discloses an electric vehicle frame, which comprises a front longitudinal beam, a battery box, a rear vertical beam, a cover plate, a rear tail frame and a rear fender, wherein the front longitudinal beam, the battery box, the rear vertical beam, the cover plate, the rear tail frame and the rear fender are all integrally formed by adopting SMC materials, the front longitudinal beam is respectively connected with a front fork and the battery box of an electric vehicle, the rear vertical beam is respectively connected with a seat of the electric vehicle and the battery box, the cover plate is buckled at the top of the battery box, the rear tail frame is connected with the rear vertical beam, the front end of the rear fender is hinged with the rear end of the battery box, and a wheel axle of a rear wheel of the electric vehicle can be connected with two side surfaces of the rear fender; the two ends of the rear shock absorber of the electric vehicle can be respectively hinged with the rear tail frame and the wheel shafts of the rear wheels of the electric vehicle. In the utility model, the front longitudinal beam, the battery box, the rear vertical beam, the cover plate, the rear tail frame and the rear mud guard are all integrally formed by SMC materials, and the electric vehicle frame is simple to process and manufacture and has high strength; the rear fender has the functions of mud and water blocking, can reliably support the rear wheel of the electric vehicle, and has a simple and reliable structure; the rear tail frame can carry load and can be connected with the rear shock absorber of the electric vehicle.

Description

Electric vehicle frame

Technical Field

The utility model relates to the field of electric vehicles, in particular to an electric vehicle frame.

Background

The frame of the electric vehicle is mostly made of steel frame bodies at present, steel pipes are cut, bent and welded to form the frame, the frame of the electric vehicle is complex in manufacturing process and multiple in working procedures, and particularly for some special-shaped frames, the production process is more complicated and is not beneficial to batch production; meanwhile, under the condition of ensuring enough supporting rigidity of the frame, the steel frame is large in weight, and the cruising of the electric vehicle is influenced.

Therefore, how to provide an electric vehicle frame, so that the above problems can be overcome, is a problem that a person skilled in the art needs to solve.

Disclosure of utility model

In view of the above, the present utility model provides an electric vehicle frame.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

The utility model provides an electric motor car frame, includes all adopts SMC material integrated into one piece's front longitudinal beam, battery box, back upright beam, apron, back tailstock and back fender, front longitudinal beam upper end can rotate with the electric motor car front fork and be connected, the lower extreme of front longitudinal beam with the front end of battery box is connected, back upright beam upper end can be connected with the electric motor car saddle, the lower extreme of back upright beam with the rear end of battery box is connected, battery box top opening is buckled and is equipped with the apron, back tailstock one end with back upright beam is connected, back tailstock arranges in the top of electric motor car rear wheel, the front end of back fender with the rear end hinge of battery box, the electric motor car rear wheel can be spacing back fender inboard, the shaft of electric motor car rear wheel can with the both sides face of back fender is connected. The two ends of the rear shock absorber of the electric vehicle can be hinged with the rear tail frame and the wheel shafts of the rear wheels of the electric vehicle respectively.

Compared with the prior art, the utility model discloses the electric vehicle frame, wherein the front longitudinal beam, the battery box, the rear vertical beam, the cover plate, the rear tail frame and the rear mud guard are all integrally formed by adopting SMC materials, and the electric vehicle frame is simple to process and manufacture and high in strength; the rear fender has the functions of mud and water blocking, can reliably support the rear wheel of the electric vehicle, and has a simple and reliable structure; the rear tail frame is connected with the rear vertical beam, and two ends of the rear shock absorber of the electric vehicle can be respectively hinged with the rear tail frame and the wheel shafts of the rear wheels of the electric vehicle, and the rear tail frame can carry loads and also can be connected with the rear shock absorber of the electric vehicle.

Preferably, the front longitudinal beam comprises an upper beam Duan Yi, a lower beam Duan Yi and a sleeve, the upper beam Duan Yi is provided with a mounting hole, an electric vehicle steering column can be inserted in the mounting hole, the lower end of the electric vehicle steering column is fixed with a front fork of the electric vehicle, the lower end of the lower beam Duan Yi and the front end of the battery box are integrally formed, the outer side wall of the lower beam Duan Yi is provided with a first abutting surface, the lower end of the upper beam Duan Yi and the upper end of the upper beam Duan Yi are abutted and both are limited in the sleeve, and the lower end of the sleeve is abutted with the first abutting surface. The front longitudinal beam is easy to process and manufacture.

Preferably, the lower end wall of the upper beam Duan Yi and the upper end wall of the lower beam Duan Yi are both perforated and are jointly provided with a first connecting bolt. The upper beam Duan Yi and the lower beam Duan Yi can be reliably connected.

Preferably, the upper beam Duan Yiyi is formed with a support plate, a connection plate and a hook, a basket of the electric vehicle can be fixed on the support plate, a control panel of the electric vehicle is fixed with the connection plate, and one side of the upper beam Duan Yi, which is close to the rear vertical beam, is integrally formed with the hook; both sides of the lower beam Duan Yi are integrally formed with baffles. The control panel, basket, and other components of the electric vehicle can be reliably connected to the upper beam Duan Yi.

Preferably, the rear vertical beam comprises an upper beam Duan Er and a lower beam Duan Er, the upper end of the upper beam Duan Er is integrally formed with a first connecting piece, the first connecting piece can be fixed with the electric vehicle seat, and the lower end of the lower beam Duan Er is integrally formed with the rear end of the battery box; an abutting surface II is arranged on the outer side wall of the lower beam Duan Er; the lower end of the upper beam Duan Er is abutted against the upper end of the lower beam Duan Er, the lower end wall of the upper beam Duan Er and the upper end wall of the lower beam Duan Er are both provided with holes, and the two holes are jointly provided with a connecting bolt II in a penetrating way; one end of the back tail frame is provided with a connecting hole, the lower end of the upper beam Duan Er and the upper end of the lower beam Duan Er are limited in the connecting hole, and the lower side of the back tail frame is in butt joint with the second butt joint surface. The rear vertical beam is easy to process and manufacture and can be reliably connected with the rear tail frame.

Preferably, a limiting plate is integrally formed at the rear end of the battery box, a first hinge hole is formed in the limiting plate, a second connecting piece is arranged at the front end of the rear fender, a second hinge hole is formed in the second connecting piece, and a hinge shaft is jointly arranged in the first hinge hole and the second hinge hole in a penetrating mode; the pedal is formed on both side surfaces of the rear fender integrally. The battery box can be reliably hinged with the rear fender.

Preferably, an installation surface is integrally formed in the battery box, an adjustment long hole is formed in the installation surface, the length direction of the adjustment long hole is perpendicular to the axial lead of the rear wheel of the electric vehicle, an installation seat is arranged on the installation surface in a clinging mode, an adjusting screw is fixed on the installation seat, the lower end of the adjusting screw is screwed with a nut after penetrating through the adjustment long hole, a central shaft of the electric vehicle is arranged on the installation seat in a penetrating mode, an inherent tooth disc is sleeved on the central shaft, the tooth disc is limited in the battery box, a flywheel is coaxially fixed on the rear wheel of the electric vehicle, a chain is sleeved on the tooth disc and the flywheel together, and a first opening and a second opening for respectively giving way to the central shaft and the chain are formed in the side wall of the battery box. The electric vehicle corresponding to the electric vehicle frame can realize manual driving.

Preferably, the mounting surface is provided with anti-skid grains. The mounting base cannot slide on the mounting surface at will.

Preferably, the battery box comprises a battery box body, and is characterized by further comprising a supporting foot frame, wherein the supporting foot frame comprises a first limiting part, a second limiting part, a rotating shaft, a spring, a ball body and a supporting rod, wherein one side of the inner bottom wall of the battery box body is integrally formed with the first limiting part, the second limiting part is buckled at the upper end of the first limiting part, a cylindrical cavity is jointly defined by the first limiting part and the second limiting part, the rotating shaft is slidably embedded into the cylindrical cavity, a limiting through hole is formed in the side wall of the rotating shaft, the spring is coaxially embedded into the limiting through hole, two ends of the spring are respectively abutted with one ball body, the ball body can be limited to the limiting through hole, a groove which is uniformly distributed in the circumferential direction is formed in the cavity wall of the cylindrical cavity, the ball body can be clamped in the groove, a sliding limiting hole is formed in one side of the bottom of the battery box body, and one end of the supporting rod is fixed with the side wall of the rotating shaft after passing through the sliding limiting hole. The supporting frame can be reliably connected with the battery box, the supporting rod can flexibly move, and the supporting frame can reliably support the electric vehicle.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present utility model, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.

FIG. 1 is an overall isometric view of an electric vehicle frame;

FIG. 2 is a bottom view of an electric vehicle frame;

FIG. 3 is an exploded isometric view of an electric vehicle frame;

FIG. 4 is a partial isometric view of an electric vehicle frame;

FIG. 5 is a partial isometric view of an electric vehicle frame;

FIG. 6 is an enlarged view of a portion of FIG. 5 at A;

FIG. 7 is an isometric view of a rear tailstock in an electric vehicle frame;

FIG. 8 is a partial isometric view of an electric vehicle frame;

FIG. 9 is a partial schematic view of an electric vehicle frame;

FIG. 10 is a cross-sectional view at B-B in FIG. 9;

Fig. 11 is an isometric view of an electric vehicle frame with an electric vehicle rear wheel mounted thereto.

In the figure:

01 is a front longitudinal beam, 010 is an upper beam Duan Yi, 0100 is a mounting hole, 0101 is a supporting plate, 0102 is a connecting plate, 0103 is a hook, 011 is a lower beam section, 0110 is a first contact surface, 0111 is a baffle, 012 is a sleeve, 02 is a battery box, 020 is a limit plate, 0200 is a first hinge hole, 021 is a mounting surface, 022 is an adjusting long hole, 023 is a sliding limit hole, 03 is a rear vertical beam, 030 is an upper beam Duan Er, 0300 is a first connecting piece, 031 is a lower beam Duan Er, 0310 is a second contact surface, 04 is a cover plate, 05 is a rear tail frame, 050 is a connecting hole, 051 is a through hole, 06 is a rear mudguard, 0600 is a second hinge hole, 061 is a pedal, 07 is a first connecting bolt, 08 is a second connecting bolt, 09 is a hinge shaft, 10 is a mounting seat, 11 is an adjusting screw, 12 is a nut, 13 is a center shaft, 14 is a chain plate, 15 is a 16 is a limit piece, 18 is a first limit piece, 18 is a second limit piece, 19 is a rotary shaft, 20 is a rotary shaft, and 220 is a rotary shaft.

Detailed Description

The following description of the technical solutions in the embodiments of the present utility model will be clear and complete, and it is obvious that the described embodiments are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

The utility model discloses an electric vehicle frame, wherein a front longitudinal beam 01, a battery box 02, a rear vertical beam 03, a cover plate 04, a rear tail frame 05 and a rear mudguard 06 are all integrally formed by SMC materials, and the electric vehicle frame is simple to process and manufacture and high in strength; the rear mudguard 06 has the functions of mud and water blocking, and can reliably support the rear wheel of the electric vehicle, and the rear mudguard 06 has a simple and reliable structure; the rear tail frame 05 is connected with the rear vertical beam 03, two ends of the rear shock absorber of the electric vehicle can be hinged with the rear tail frame 05 and the wheel shafts of the rear wheels of the electric vehicle respectively, and the rear tail frame 05 can carry load and can be connected with the rear shock absorber of the electric vehicle; the front longitudinal beam 01 comprises an upper beam Duan Yi, a lower beam Duan Yi 011 and a sleeve 012, the rear vertical beam 03 comprises an upper beam Duan Er 030 and a lower beam Duan Er 031, and the design enables the front longitudinal beam 01 and the rear vertical beam 03 to be assembled in a segmented manner, the front longitudinal beam 01 and the rear vertical beam 03 are easy to manufacture and assemble, and the electric vehicle frame is easy to load and transport; a middle shaft 13 and a tooth disc 14 are arranged in the battery box 02, and the electric vehicle frame can realize manual driving; the design of the adjustment slot 022 and the mounting base 10 enables the tension degree of the chain 16 to be adjusted.

Examples

Referring to fig. 1-11, which are schematic views of the whole and part of the structure of an embodiment of the utility model, the electric vehicle frame of the utility model comprises a front longitudinal beam 01, a battery box 02, a rear vertical beam 03, a cover plate 04, a rear tail frame 05 and a rear mudguard 06 which are all integrally formed by SMC materials, wherein the SMC materials have good electric insulation, heat resistance, flame retardance, mechanical strength and the like;

The upper end of the front longitudinal beam 01 can be rotationally connected with a front fork of the electric vehicle, and the lower end of the front longitudinal beam 01 is connected with the front end of the battery box 02;

The upper end of the rear vertical beam 03 can be connected with an electric vehicle seat, and the lower end of the rear vertical beam 03 is connected with the rear end of the battery box 02;

The top of the battery box 02 is opened and buckled with a cover plate 04, an electric vehicle battery is contained in the battery box 02, the electric vehicle battery and the mounting seat are sequentially arranged front and back, one end of the rear tail frame 05 is connected with the rear vertical beam 03, and the rear tail frame 05 is arranged above the rear wheels of the electric vehicle;

the front end of the rear fender 06 is hinged with the rear end of the battery box 02, the rear wheel of the electric vehicle can be limited at the inner side of the rear fender 06, and the wheel axle of the rear wheel of the electric vehicle can be connected with two side surfaces of the rear fender 06;

The electric motor car is back to be moved away to avoid possible earthquakes and is equipped with two, and the both ends of moving away to avoid possible earthquakes behind every electric motor car can be articulated with the shaft of back tailstock 05 and electric motor car rear wheel respectively, reserve on the back tailstock 05 be used for with electric motor car back to move away to avoid possible earthquakes articulated through-hole 051.

The front longitudinal beam 01 comprises an upper beam Duan Yi, a lower beam Duan Yi 011 and a sleeve 012, wherein the upper beam Duan Yi 010 is provided with a mounting hole 0100, an electric vehicle steering column can be inserted into the mounting hole 0100, and an electric vehicle front fork is fixed at the lower end of the electric vehicle steering column;

the lower extreme and the front end integrated into one piece of battery box 02 of underbeam Duan Yi 011, the lateral wall of underbeam Duan Yi 011 is equipped with a 0110 of butt face, the lower extreme of upper beam Duan Yi 010 and the upper end butt of upper beam Duan Yi 010 and both limit in sleeve 012, the inner wall of sleeve 012 and the lateral wall of upper beam Duan Yi 010 and the lateral wall of underbeam Duan Yi 011 in close contact, sleeve 012 lower extreme and a 0110 butt of butt face, sleeve 012 can carry out spacingly to upper beam Duan Yi 010 and underbeam Duan Yi 011, improve the holistic bending strength after the two are connected. Abutment surface one 0110 can prevent sleeve 012 from sliding down.

The lower end wall of the upper beam Duan Yi 010 and the upper end wall of the lower beam Duan Yi 011 are both provided with holes and are jointly provided with a first connecting bolt 07 in a penetrating way, and the first connecting bolt 07 and the matched clamping nut 12 can clamp and limit the upper beam Duan Yi 010 and the lower beam Duan Yi 011 together, so that the lower end of the upper beam Duan Yi 010 and the upper end of the upper beam Duan Yi 010 can be stably and reliably abutted.

The upper beam Duan Yi 010,010 is integrally formed with a supporting plate 0101, a connecting plate 0102 and a hook 0103, a basket of the electric vehicle can be fixed on the supporting plate 0101, a control panel of the electric vehicle is fixed with the connecting plate 0102, and one side of the upper beam Duan Yi 010,010 close to the rear vertical beam 03 is integrally formed with the hook 0103; both sides of the lower beam Duan Yi are integrally formed with a baffle 0111, and the baffle 0111 has the functions of blocking mud and water.

The rear vertical beam 03 comprises an upper beam Duan Er and a lower beam Duan Er 031, wherein a first connecting piece 0300 is integrally formed at the upper end of the upper beam Duan Er 030, the first connecting piece 0300 can be fixed with a saddle of the electric vehicle in a bolt connection mode, and the lower end of the lower beam Duan Er 031 is integrally formed with the rear end of the battery box 02;

An abutting surface II 0310 is arranged on the outer side wall of the lower beam Duan Er 031; the lower end of the upper beam Duan Er 030 is abutted against the upper end of the lower beam Duan Er 031, the lower end wall of the upper beam Duan Er 030 and the upper end wall of the lower beam Duan Er 031 are both provided with holes, a second connecting bolt 08 is arranged in a penetrating manner, the second connecting bolt 08 and a matched clamping nut 12 can clamp and limit the upper beam Duan Er 030 and the lower beam Duan Er 031 together, and the lower end of the upper beam Duan Er 030 is ensured to be abutted against the upper end of the lower beam Duan Er 031 reliably;

One end of the back tailstock 05 is provided with a connecting hole 050, the lower end of an upper beam Duan Er 030 and the upper end of a lower beam Duan Er 031 are limited in the connecting hole 050, the lower side of the back tailstock 05 is abutted with a second 0310 abutting surface, the outer side wall of the upper beam Duan Er 030 can be in close contact with the inner wall of the connecting hole 050, the connecting hole 050 can limit the upper beam Duan Er 030 and the lower beam Duan Er 031, and the integral bending strength of the upper beam Duan Er and the lower beam Duan Er 031 after connection is improved. The abutment surface two 0310 can prevent the rear bracket 05 from sliding down.

The rear end of the battery box 02 is integrally formed with two limiting plates 020, the limiting plates 020 are provided with hinge holes one 0200, the front end of the rear mudguard 06 is provided with a connecting piece two 060, the connecting piece two 060 is arranged between the two limiting plates 020, the connecting piece two 060 is provided with hinge holes two 0600, and one hinge shaft 09 is jointly penetrated in the hinge holes one 0200 and two 0600; the pedals 061 are integrally formed on the two side surfaces of the rear mudguard 06.

The battery box 02 is internally and integrally formed with a mounting surface 021, the mounting surface 021 is provided with an adjusting long hole 022, the length direction of the adjusting long hole 022 is perpendicular to the axial lead of the rear wheel of the electric vehicle, the mounting surface 021 is closely provided with a mounting seat 10, the mounting seat 10 is fixedly provided with an adjusting screw 11, the lower end of the adjusting screw 11 is screwed with a nut 12 after passing through the adjusting long hole 022, the adjusting screw 11 can fix the mounting seat 10 on the mounting surface 021, and meanwhile, the position of the mounting seat 10 can be adjusted due to the adjusting long hole 022, so that the tightness of a chain 16 is realized; the mounting seat 10 is penetrated with a middle shaft 13 of the electric vehicle, two ends of the middle shaft 13 are fixedly provided with cranks, the cranks are arranged outside the battery box 02, the middle shaft 13 is sleeved with a fixed toothed disc 14, the toothed disc 14 is limited in the battery box 02, the rear wheel of the electric vehicle is coaxially fixed with a flywheel 15, the toothed disc 14 and the flywheel 15 are sleeved with a chain 16 together, and the side wall of the battery box 02 is provided with a first opening and a second opening for respectively giving way to the middle shaft 13 and the chain 16.

The mounting surface 021 is provided with anti-slip lines, and the contact position of the mounting seat 10 and the mounting surface 021 is also provided with anti-slip lines, so that the mounting seat 10 can be ensured not to slide on the mounting surface 021 at will.

The device further comprises a supporting frame, wherein the supporting frame comprises a first limiting part 17, a second limiting part 18, a rotating shaft 19, a spring 20, a ball 21 and a supporting rod 22;

A first limiting part 17 is integrally formed on one side of the inner bottom wall of the battery box 02, a second limiting part 18 is buckled at the upper end of the first limiting part 17, a first cylindrical cavity is jointly limited by the first limiting part 17 and the second limiting part 18, a rotating shaft 19 is slidably embedded in the cylindrical cavity, a limiting through hole is formed in the side wall of the rotating shaft 19, a spring 20 is coaxially embedded in the limiting through hole, two ends of the spring 20 are respectively abutted to a ball 21, the balls 21 can be limited in the limiting through hole, four grooves are uniformly arranged in the circumferential direction on the cavity wall of the cylindrical cavity, the balls 21 can be clamped in the grooves, the balls 21, the springs and the like are designed, the purpose is that a supporting rod 22 is limited, a sliding limiting hole 023 communicated with the cylindrical cavity is formed in one side of the bottom of the battery box 02, one end of the supporting rod 22 is fixed with the side wall of the rotating shaft 19 after passing through the sliding limiting hole 023, a poking plate 220 is integrally formed on the side wall of the supporting rod 22, a user can use the foot plate 220 to poke the supporting rod 22 to slide along the sliding limiting hole 023, and simultaneously, and the rotating shaft 19 rotates in the cylindrical cavity; when the stay bar 22 slides to be abutted with one end of the sliding limiting hole 023, the two spheres 21 are respectively embedded into the two oppositely arranged grooves, and at the moment, one end of the stay bar 22, which is far away from the rotating shaft 19, can be abutted with the ground, so that the electric vehicle frame is supported; when the stay bar 22 slides to abut against the other end of the sliding limiting hole 023, the two spheres 21 are respectively embedded into the other two oppositely arranged grooves, and the end part of the stay bar 22 cannot abut against the ground, so that the retraction of the stay bar 22 is realized. The supporting frame of the form is simple in structure and can reliably support the frame of the electric vehicle.

When the electric vehicle frame is used, the upper beam Duan Yi, the lower beam Duan Yi 011 and the sleeve 012 are firstly installed in place, then the upper beam Duan Er, the lower beam Duan Er 031 and the rear tail frame 05 are installed, and finally the front fork, the wheels, the batteries and the control components of the electric vehicle are installed.

In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present utility model is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (9)

1. The electric vehicle frame is characterized by comprising a front longitudinal beam (01), a battery box (02), a rear vertical beam (03), a cover plate (04), a rear tail frame (05) and a rear fender (06) which are all formed by adopting SMC materials in an integrated mode, wherein the upper end of the front longitudinal beam (01) can be rotationally connected with a front fork of an electric vehicle, the lower end of the front longitudinal beam (01) is connected with the front end of the battery box (02), the upper end of the rear vertical beam (03) can be connected with a seat of the electric vehicle, the lower end of the rear vertical beam (03) is connected with the rear end of the battery box (02), the top of the battery box (02) is opened and buckled with the cover plate (04), one end of the rear tail frame (05) is connected with the rear vertical beam (03), the rear tail frame (05) is arranged above a rear wheel of the electric vehicle, the front end of the rear fender (06) is hinged with the rear end of the battery box (02), the rear wheel of the electric vehicle can be limited on the inner side of the rear fender (06), and the rear wheel axle (06) can be connected with two rear wheels of the electric vehicle; the two ends of the rear shock absorber of the electric vehicle can be hinged with the rear tail frame (05) and the wheel shafts of the rear wheels of the electric vehicle respectively.

2. The electric vehicle frame according to claim 1, wherein the front side member (01) includes an upper beam Duan Yi (010), a lower beam Duan Yi (011) and a sleeve (012), the upper beam Duan Yi (010) is provided with a mounting hole (0100), an electric vehicle steering column can be inserted in the mounting hole (0100), the lower end of the electric vehicle steering column is fixed with the electric vehicle front fork, the lower end of the lower beam Duan Yi (011) is integrally formed with the front end of the battery box (02), an abutment surface one (0110) is provided on the outer side wall of the lower beam Duan Yi (011), the lower end of the upper beam Duan Yi (010) and the upper end of the upper beam Duan Yi (010) abut and both are limited in the sleeve (012), and the lower end of the sleeve (012) abuts against the abutment surface one (0110).

3. An electric vehicle frame as claimed in claim 2, characterized in that the lower end wall of the upper beam Duan Yi (010) and the upper end wall of the lower beam Duan Yi (011) are both perforated and are jointly threaded with a connecting bolt one (07).

4. The electric vehicle frame according to claim 2, wherein the upper beam Duan Yi (010) is integrally formed with a support plate (0101), a connecting plate (0102) and a hook (0103), a basket of the electric vehicle can be fixed on the support plate (0101), a control panel of the electric vehicle is fixed with the connecting plate (0102), and one side of the upper beam Duan Yi (010) close to the rear vertical beam (03) is integrally formed with the hook (0103); both sides of the lower beam Duan Yi (011) are integrally formed with baffles (0111).

5. The electric vehicle frame according to claim 1, wherein the rear vertical beam (03) comprises an upper beam Duan Er (030) and a lower beam Duan Er (031), a first connecting piece (0300) is integrally formed at the upper end of the upper beam Duan Er (030), the first connecting piece (0300) can be fixed with the electric vehicle seat, and the lower end of the lower beam Duan Er (031) is integrally formed with the rear end of the battery box (02); an abutting surface II (0310) is arranged on the outer side wall of the lower beam Duan Er (031); the lower end of the upper beam Duan Er (030) is abutted against the upper end of the lower beam Duan Er (031), and the lower end wall of the upper beam Duan Er (030) and the upper end wall of the lower beam Duan Er (031) are both provided with holes and are jointly provided with a connecting bolt II (08); one end of the back tail frame (05) is provided with a connecting hole (050), the lower end of the upper beam Duan Er (030) and the upper end of the lower beam Duan Er (031) are limited in the connecting hole (050), and the lower side of the back tail frame (05) is abutted to the abutting surface II (0310).

6. The electric vehicle frame according to claim 1, wherein a limiting plate (020) is integrally formed at the rear end of the battery box (02), a first hinge hole (0200) is formed in the limiting plate (020), a second connecting piece (060) is arranged at the front end of the rear fender (06), a second hinge hole (0600) is formed in the second connecting piece (060), and a hinge shaft (09) is jointly arranged in the first hinge hole (0200) and the second hinge hole (0600) in a penetrating mode; both side surfaces of the rear mudguard (06) are integrally formed with pedals (061).

7. The electric vehicle frame according to claim 1, characterized in that a mounting surface (021) is integrally formed inside the battery box (02), an adjusting long hole (022) is formed in the mounting surface (021), the length direction of the adjusting long hole (022) is perpendicular to the axial lead of the rear wheel of the electric vehicle, a mounting seat (10) is tightly attached to the mounting surface (021), an adjusting screw (11) is fixed on the mounting seat (10), the lower end of the adjusting screw (11) is screwed with a nut (12) after penetrating through the adjusting long hole (022), a middle shaft (13) of the electric vehicle is arranged on the mounting seat (10) in a penetrating mode, a tooth disc (14) is sleeved on the middle shaft (13), the tooth disc (14) is limited in the battery box (02), a flywheel (15) is coaxially fixed on the rear wheel of the electric vehicle, a chain (16) is sleeved on the side wall of the battery box (02) in a sleeved mode, and a gap is formed in the side wall of the battery box (02) for enabling the middle shaft (13) and the chain (16) to be in a gap.

8. The electric vehicle frame of claim 7, characterized in that the mounting surface (021) is provided with anti-skid lines.

9. The electric vehicle frame according to claim 1, further comprising a supporting frame, wherein the supporting frame comprises a first limiting part (17), a second limiting part (18), a rotating shaft (19), a spring (20), a ball body (21) and a supporting rod (22), wherein the first limiting part (17) is integrally formed on one side of the inner bottom wall of the battery box (02), the second limiting part (18) is buckled at the upper end of the first limiting part (17), a cylindrical cavity is jointly limited by the first limiting part (17) and the second limiting part (18), the rotating shaft (19) is slidably embedded into the cylindrical cavity, a limiting through hole is formed in the side wall of the rotating shaft (19), the spring (20) is coaxially embedded into the limiting through hole, two ends of the spring (20) are respectively abutted to one ball body (21), the ball body (21) can be limited into the limiting through hole, grooves which are uniformly distributed circumferentially are formed in the cavity wall of the cylindrical cavity, the ball body (21) can be clamped in the grooves, and one side wall of the supporting rod (023) can be fixedly arranged on one side of the side wall of the rotating shaft (19) which is provided with the limiting through hole (023).