A reinforcing structure of an electric vehicle frame

Abstract

The application discloses a reinforcing structure of an electric vehicle frame, and relates to the technical field of electric vehicles, which comprises a vehicle head reinforcing structure and a vehicle body reinforcing structure fixedly connected with the vehicle head reinforcing structure; the vehicle head reinforcing structure comprises an upper vehicle head cover plate, a lower vehicle head cover plate, a first connecting piece, an upper wing of the vehicle head cover plate and a lower wing of the vehicle head cover plate; and the vehicle body reinforcing structure comprises an upper vehicle body cover plate, a lower vehicle body cover plate, a second connecting piece, an upper wing of the vehicle body cover plate and a lower wing of the vehicle body cover plate. Compared with the prior art, the reinforcing structure of the electric vehicle frame has the advantages that the frame and the reinforcing structure are in surface contact, and the rigidity of the frame in multiple directions is enhanced.

Description

Technical Field

[0001] This invention relates to the field of electric vehicle technology, and in particular to a reinforcement structure for electric vehicle frames. Background Technology

[0002] According to the new national regulations, two-wheeled electric vehicles are divided into three types: electric motorcycles, electric mopeds, and two-wheeled electric bicycles.

[0003] Because the structural strength of the frame of electric motorcycles and electric mopeds is only sufficient to meet the daily riding and commuting requirements of users, the original lithium batteries that come with them cannot meet the range and performance improvement needs of express delivery, food delivery, and long-distance travel. The original frame cannot support the weight of the lithium battery, especially when riding on rough roads, going over potholes, or when there are steps on the road. The frame needs to withstand greater downward force, which can easily lead to breakage and accidents. Even with the existing welding methods, the stress is concentrated at the weld joint after welding, and the high temperature of welding can make it brittle and prone to breakage, seriously endangering driving safety.

[0004] Because the maximum weight of two-wheeled electric bicycles cannot exceed the national weight standard, in order to balance cost and performance requirements, manufacturers only ensure the structural strength of the frame of two-wheeled electric bicycles meets the user's basic riding needs. However, with the rapid growth of the express delivery business, two-wheeled electric bicycles, due to their flexibility and adaptability to various road conditions, are favored by delivery drivers. However, due to their manufacturing limitations, when transporting heavy goods, the frame structure often fails to meet the load requirements, leading to bending, deformation, or even breakage, seriously endangering driving safety. To address this, patent CN202120472192.1 discloses a reinforcing plate technology, including a left side plate, a right side plate, and a first connecting member; the edges of the left side plate and the right side plate are each provided with a first connecting portion, and the two ends of the first connecting member can be connected to the first connecting portion of the left side plate and the first connecting portion of the right side plate, respectively; the left side plate and the right side plate... Each plate is equipped with mounting slots, and the first connecting component used is a screw and a nut. The technical principle is as follows: the left and right side plates are fixed to the frame through the first connecting component to enhance the frame's rigidity. In this structure, since the left and right side plates are flat, while the frame is a cylindrical tube, and the screw is a rod, theoretically, the contact between the plate-like and tubular components is linear. However, since the screw connects the left and right side plates, the contact between the cylindrical tube and the screw is point contact. Thus, when the frame transmits force to the left and right side plates and the screw, it is concentrated on a single line or point on the frame. This can easily lead to deformation of the frame due to the concentrated force. Furthermore, the frame's rigidity is only reinforced in the directions of the left and right side plates, the upper bolt, and the lower bolt. Other directions are not reinforced. During use, the frame is subjected to complex forces. Under these circumstances, excessive force in the unreinforced directions can easily lead to frame deformation or even cracking. Summary of the Invention

[0005] The purpose of this invention is to provide a reinforcement structure for an electric vehicle frame that overcomes one or more of the above-mentioned disadvantages, wherein the frame and the reinforcement structure are in surface contact, and the rigidity of the frame is enhanced in multiple directions.

[0006] This invention is implemented as follows:

[0007] Option 1: Includes a front-end reinforcement structure and a body reinforcement structure fixedly connected to the front-end reinforcement structure;

[0008] The front reinforcement structure includes a grooved upper front cover plate covering the main beam of the front of the vehicle, a grooved lower front cover plate covering the main beam of the front of the vehicle, and a first connector. The upper front cover plate has upper front cover plate connecting structures on its left and right sides, and the lower front cover plate has lower front cover plate connecting structures on its left and right sides corresponding to the upper front cover plate connecting structures. The first connector fixes the upper front cover plate connecting structures and the lower front cover plate connecting structures together, so that the upper front cover plate and the lower front cover plate wrap around the main beam of the front of the vehicle.

[0009] The vehicle body reinforcement structure includes a recessed upper body cover plate covering the main body beam, a recessed lower body cover plate covering the main body beam, and a second connector. At least one of the upper and lower body covers plates has a notch to avoid components protruding from the outer surface of the main body beam. The upper body cover plate has upper body cover plate connecting structures on both the left and right sides (the recessed cover plate can also be configured as a structure of left and right body covers plate, with cover plate connecting structures on the upper and lower sides). Corresponding to the upper body cover plate connecting structures, the lower body cover plate has lower body cover plate connecting structures on both the left and right sides. The second connector fixes the upper body cover plate connecting structures and the lower body cover plate connecting structures together, so that the upper and lower body covers plate wrap around the main body beam.

[0010] Preferably, it further includes a grooved central shaft connecting plate cover that is fastened from bottom to top onto the central shaft connecting plate of the electric vehicle frame, a grooved central shaft cover that is fastened from the rear outside onto the central shaft member of the central shaft connecting plate of the electric vehicle frame, and a third connector. The central shaft connecting plate cover is fixed to the central shaft connecting plate by the third connector. One end of the grooved central shaft connecting plate cover is fixedly connected to the vehicle body reinforcement structure, and the horizontally placed grooved central shaft cover is fixedly connected to the other end of the central shaft connecting plate cover so that the rear central shaft member of the central shaft connecting plate is wrapped between the grooved central shaft cover and the other end of the central shaft connecting plate cover.

[0011] Preferably, a pair of rear support rods are provided, which are respectively set on the left and right sides of the central shaft connecting plate cover. One end of the rear support rod is fixed to the other end of the central shaft connecting plate cover, and the other end of the rear support rod is used to support the crossbar of the rear support.

[0012] One type of existing two-wheeled electric vehicle has a frame comprising a tubular front main beam with a head tube, a tubular body main beam fixedly connected to the front main beam, and a central axle component fixedly connected to the body main beam via a central axle connecting plate. The front wheel assembly is rotatably connected to the head tube, and the rear wheel assembly is connected to the central axle component. Front support frames are connected to the left and right sides of the front main beam, and body support frames with rear supports are connected to the left and right sides of the body main beam. The front main beam, body main beam, and central axle connecting plate with central axle component constitute the skeleton of the two-wheeled electric vehicle. Other support frames are used to support other components of the two-wheeled electric vehicle and transfer the weight of these components to the skeleton of the two-wheeled electric vehicle.

[0013] When strengthening the rigidity of the frame of a two-wheeled electric vehicle, the first connector fixes the upper front cover connecting structure and the lower front cover connecting structure, so that the upper and lower front covers wrap around the main beam of the front. The second connector fixes the upper body cover connecting structure and the upper body cover connecting structure, so that the upper and lower body covers wrap around the main beam of the body. The central axle connecting plate reinforcement structure, which is fixedly connected to the body reinforcement structure, wraps around the central axle connecting plate with the central axle component. The rear support is supported on the crossbar of the rear support by a pair of rear support support rods, thereby strengthening the rigidity of the rear support.

[0014] A horizontally placed, grooved central shaft cover is used, and the horizontally placed, grooved central shaft cover is fixedly connected to the other end of the central shaft connecting plate cover so that the central shaft component at the rear of the central shaft connecting plate is wrapped between the grooved central shaft cover and the other end of the central shaft connecting plate cover. This not only strengthens the rigidity of the central shaft component, but also avoids damage to the rubber components inside the central shaft component caused by other strengthening techniques (such as welding techniques).

[0015] Preferably, the upper cab hood connection structure consists of cab hood through holes on the left and right sides of the upper cab hood, and the corresponding lower cab hood connection structure consists of cab hood screw holes on the left and right sides of the lower cab hood. The first connector includes bolts, and the bolts of the first connector passing through the cab hood through holes on the left and right sides of the upper cab hood are tightened onto the corresponding cab hood screw holes on the left and right sides of the lower cab hood, thus fixing the upper and lower cab hoods together so that the upper and lower cab hoods wrap around the main beam of the cab. Alternatively, the upper body cover connection structure consists of body cover through holes on the left and right sides of the upper body cover, and the corresponding lower body cover connection structure consists of body cover screw holes on the left and right sides of the lower body cover. The second connector includes bolts, and the bolts of the second connector that pass through the body cover through holes on the left and right sides of the upper body cover are tightened onto the corresponding body cover screw holes on the left and right sides of the lower body cover, thus fixing the upper body cover and the lower body cover together so that the upper body cover and the lower body cover wrap around the main beam of the vehicle body.

[0016] Preferably, the upper hood panel connecting structure consists of perforated upper hood panel wings on both sides of the upper hood panel, and the corresponding lower hood panel connecting structure consists of perforated lower hood panel wings on both sides of the lower hood panel. The upper body panel connecting structure consists of perforated body panel wings on both sides of the upper body panel, and the corresponding lower body panel connecting structure consists of perforated lower body panel wings on both sides of the lower body panel. The first connecting component includes bolts and nuts (or threaded holes can be provided on one of the cover plates, corresponding to the other cover plate, hereinafter the same). The bolts and nuts passing through the perforations on the upper and lower flanks of the upper and lower hoods, respectively, secure the upper and lower hoods together, so that the upper and lower hoods cover the main beam of the vehicle. The second connector, consisting of bolts and nuts, also secures the upper and lower hoods together by passing through the perforations on the upper and lower flanks of the upper and lower hoods, respectively, so that the upper and lower hoods cover the main beam of the vehicle.

[0017] Option 2: Includes a front-end reinforcement structure and a body reinforcement structure fixedly connected to the front-end reinforcement structure;

[0018] The front reinforcement structure includes a grooved upper front cover plate wrapped around the front main beam and fasteners that fix the upper front cover plate to the front main beam;

[0019] The vehicle body reinforcement structure includes a recessed upper body cover plate covering the main body beam, a recessed lower body cover plate covering the main body beam, and a second connector. At least one of the upper body cover plate and the lower body cover plate is provided with a notch to avoid the components protruding from the outer surface of the main body beam. Upper body cover plate connecting structures are provided on the left and right sides of the upper body cover plate, and lower body cover plate connecting structures are provided on the left and right sides of the lower body cover plate corresponding to the upper body cover plate connecting structures. The second connector fixes the upper body cover plate connecting structures and the lower body cover plate connecting structures together, so that the upper body cover plate and the lower body cover plate wrap around the main body beam.

[0020] Preferably, the upper body cover connecting structure consists of body cover through holes on the left and right sides of the upper body cover, and the corresponding lower body cover connecting structure consists of body cover screw holes on the left and right sides of the lower body cover. The second connecting member includes bolts, and the bolts of the second connecting member passing through the body cover through holes on the left and right sides of the upper body cover are tightened onto the corresponding body cover screw holes on the left and right sides of the lower body cover, thereby fixing the upper body cover and the lower body cover together so that the upper body cover and the lower body cover wrap around the main beam of the vehicle body.

[0021] Preferably, the upper body cover plate connecting structure is a perforated upper body cover plate wing on the left and right sides of the upper body cover plate, and the corresponding lower body cover plate connecting structure is a perforated lower body cover plate wing on the left and right sides of the lower body cover plate. The second connecting member includes bolts and nuts. The bolts and nuts of the second connecting member passing through the perforations on the upper body cover plate wing on the left and right sides of the upper body cover plate and the corresponding perforations on the lower body cover plate wing on the left and right sides of the lower body cover plate fix the upper body cover plate and the lower body cover plate to be connected, so that the upper body cover plate and the lower body cover plate wrap around the main beam of the vehicle body.

[0022] Preferably, a pair of central shaft connecting plate reinforcing plates are provided, with one end of each pair of central shaft connecting plate reinforcing plates fixed to the left and right sides of the vehicle body reinforcement structure, and the pair of central shaft connecting plate reinforcing plates are used to fix to the pair of central shaft connecting plates respectively to enhance the rigidity of the pair of central shaft connecting plates.

[0023] Preferably, the upper body cover is provided with reinforcing wings that extend to the left and right sides.

[0024] One type of existing two-wheeled electric vehicle has a frame that includes a tubular head beam with a head tube, a tubular body beam fixedly connected to the head beam, and a pair of center axle connecting plates for fixed connection to a horizontal fork with a center axle component. The front wheel assembly is rotatably connected to the head tube, and the rear wheel assembly is connected to the center axle component. Body support frames with rear brackets are connected to the left and right sides of the body beam. The head beam and body beam constitute the skeleton of the two-wheeled electric vehicle. Other support frames are used to support other components of the two-wheeled electric vehicle and transfer the weight of these components to the skeleton of the two-wheeled electric vehicle.

[0025] When strengthening the rigidity of the frame of a two-wheeled electric vehicle, the fasteners fix the upper front cover plate, which is wrapped around the main beam of the front of the vehicle, to the main beam. The second connector fixes the upper wing and lower wing of the body cover plate, so that the upper and lower body covers plate wrap around the main beam of the vehicle. One end of a pair of central axle connecting plate reinforcement plates is fixed to the left and right sides of the body reinforcement structure. The pair of central axle connecting plate reinforcement plates are used to fix to the pair of central axle connecting plates respectively to strengthen the rigidity of the pair of central axle connecting plates. The reinforcing wings that are set on both sides of the upper body cover plate and extend to the left and right sides are fixedly connected to the body support frame connected to the left and right sides of the main beam of the vehicle to strengthen the rigidity of the body support frame and its ability to support the load.

[0026] Option 3: Includes a front-end reinforcement structure and a body reinforcement structure fixedly connected to the front-end reinforcement structure;

[0027] The front reinforcement structure includes a grooved upper front cover plate covering the main beam of the front of the vehicle, a grooved lower front cover plate covering the main beam of the front of the vehicle, and a first connector. The upper front cover plate has upper front cover plate connecting structures on its left and right sides, and the lower front cover plate has lower front cover plate connecting structures on its left and right sides corresponding to the upper front cover plate connecting structures. The first connector fixes the upper front cover plate connecting structures and the lower front cover plate connecting structures together, so that the upper front cover plate and the lower front cover plate wrap around the main beam of the front of the vehicle.

[0028] The vehicle body reinforcement structure includes a U-shaped body cover with a grooved cross section that covers the U-shaped main body beam, a connecting plate in the middle of the U-shaped body cover to ensure the rigidity of the U-shaped body cover, and a notch on the U-shaped body cover that avoids the protrusion on the outer surface of the main body beam.

[0029] Preferably, the upper cab cover connection structure consists of cab cover through holes on the left and right sides of the upper cab cover, and the corresponding lower cab cover connection structure consists of cab cover screw holes on the left and right sides of the lower cab cover. The first connector includes bolts, and the bolts of the first connector passing through the cab cover through holes on the left and right sides of the upper cab cover are tightened onto the corresponding cab cover screw holes on the left and right sides of the lower cab cover, thereby fixing the upper cab cover and the lower cab cover together so that the upper cab cover and the lower cab cover wrap around the main beam of the cab.

[0030] Preferably, the upper cab cover connecting structure is a perforated cab cover upper wing on the left and right sides of the upper cab cover, and the corresponding upper cab cover connecting structure is a perforated cab cover lower wing on the left and right sides of the lower cab cover. The first connecting member includes bolts and nuts. The bolts and nuts of the first connecting member passing through the perforations on the upper cab cover upper wings on the left and right sides of the upper cab cover and the corresponding perforations on the lower cab cover lower wings on the left and right sides of the lower cab cover fix the upper cab cover and the lower cab cover to be connected, so that the upper cab cover and the lower cab cover wrap around the main beam of the cab.

[0031] The vehicle body reinforcement structure includes a U-shaped body cover with a grooved cross section that covers the U-shaped main beam of the vehicle body, and a connecting plate set in the middle of the U-shaped body cover to ensure the rigidity of the U-shaped body cover.

[0032] Preferably, a pair of central shaft connecting plate reinforcing plates are provided, with one end of each pair of central shaft connecting plate reinforcing plates fixed to the left and right sides of the U-shaped opening of the U-shaped body cover, and the pair of central shaft connecting plate reinforcing plates are used to fix to the pair of central shaft connecting plates respectively to enhance the rigidity of the pair of central shaft connecting plates.

[0033] Preferably, a rear support rod is fixed to each of the pair of central shaft connecting plates and reinforcing plates, with the upper part of the rear support rod connected to the upper part of the rear support to enhance the rigidity of the rear support.

[0034] Preferably, a body beam cover plate with a grooved cross section is provided on the U-shaped body cover plate near the front reinforcement structure, and the body beam cover plate is fixedly connected to the U-shaped body cover plate.

[0035] One type of existing two-wheeled electric vehicle has a frame comprising a tubular front main beam with a head tube, a tubular U-shaped body main beam fixedly connected to the front main beam, a tubular crossbeam, and a center axle connecting plate for connecting a horizontal fork with a center axle component. The tubular crossbeam near the front main beam is slightly upturned on both sides and fixedly connected to the U-shaped body main beam. The center axle connecting plate is fixedly connected to the body main beam via a rear crossbeam. The front wheel assembly is rotatably connected to the head tube, and the rear wheel assembly is connected to the center axle component. A U-shaped body support frame with a rear bracket is connected above the body main beam. The front main beam and the body main beam with the center axle connecting plate constitute the skeleton of the two-wheeled electric vehicle. The other support frames are used to support other components of the two-wheeled electric vehicle and transfer the weight of these components to the skeleton of the two-wheeled electric vehicle.

[0036] When strengthening the rigidity of the frame of a two-wheeled electric vehicle, the first connecting piece fixes the upper wing of the front cover and the lower wing of the front cover, so that the upper and lower front covers wrap around the main beam of the front. The U-shaped body cover with a concave cross section wraps around the U-shaped main beam of the body. At the same time, the body crossbeam cover with a concave cross section wraps around the middle of the tubular crossbeam and makes the two sides of the tubular crossbeam rest against the body crossbeam cover. Then, the central axle connecting plate reinforcement plate is fixed to the central axle connecting plate to strengthen the rigidity of the pair of central axle connecting plates. The upper part of the rear support rod is fixedly connected to the upper part of the rear support to enhance the support force of the rear support.

[0037] Because the technology of this invention adopts a wrapping form, the force borne by the frame of the two-wheeled electric vehicle is transmitted to the front reinforcement structure and the body reinforcement structure in multiple directions, and effectively obtains a strong response from the front reinforcement structure and the body reinforcement structure. This effectively strengthens the frame of the two-wheeled electric vehicle to resist forces exceeding the design requirements at the time of manufacture in various directions, thereby effectively improving the carrying capacity of the two-wheeled electric vehicle.

[0038] Compared with existing technologies, this invention has the advantages of surface contact between the frame and the reinforcement structure, enhanced rigidity of the frame in multiple directions, simple structure, and convenient installation. Attached Figure Description

[0039] Figure 1 This is a schematic diagram of the reinforcement structure of the electric vehicle frame of the present invention, embodiment 1;

[0040] Figure 2 for Figure 1 Exploded view;

[0041] Figure 3A schematic diagram of the structure in Example 1 for reinforcement;

[0042] Figure 4 This is a schematic diagram of embodiment 2 of the reinforcement structure for the electric vehicle frame of the present invention;

[0043] Figure 5 for Figure 4 Exploded view;

[0044] Figure 6 Schematic diagram of the structure in embodiment 2 for reinforcement;

[0045] Figure 7 This is a schematic diagram of embodiment 3 of the reinforcement structure for the electric vehicle frame of the present invention;

[0046] Figure 8 for Figure 7 Exploded view;

[0047] Figure 9 Schematic diagram of the structure in embodiment 3 for reinforcement;

[0048] Figure 10 This is a schematic diagram of embodiment 4 of the reinforcement structure for the electric vehicle frame of the present invention;

[0049] Figure 11 for Figure 10 Exploded view;

[0050] Figure 12 Schematic diagram of the structure in embodiment 4 for reinforcement;

[0051] Figure 13 This is a schematic diagram of embodiment 5 of the reinforcement structure for the electric vehicle frame of the present invention;

[0052] Figure 14 for Figure 13 Exploded view;

[0053] Figure 15 Schematic diagram of the structure in Example 5 for reinforcement;

[0054] Figure 16 This is a schematic diagram of the structure of the electric vehicle frame after the battery pack housing is installed.

[0055] Figure Numbers: 1. Head tube; 2. Head main beam; 3. Body main beam; 4. Central axle component; 5. Rear support; 6. Head reinforcement structure; 601. Upper head cover; 6011. Notch; 602. Lower head cover; 6021. Upper unit of lower head cover; 6022. Lower unit of lower head cover; 603. First connecting piece; 604. Upper wing of head cover; 605. Lower wing of head cover; 606. Connecting rod; 607. Upper fork-shaped plate; 608. Fixing Fixed parts; 6081, lower cover of the hood tube; 6082, threaded rod with tube sleeve; 609, hood through hole with countersunk hole; 610, hood threaded hole; 7, body reinforcement structure; 701, upper body cover; 7011, upper body cover unit; 702, lower body cover; 7021, lower body cover unit; 703, second connecting part; 704, upper wing of body cover; 705, lower wing of body cover; 706, body cover connecting rod; 707, stop Surface; 708, Lower fork-shaped plate; 709, Reinforcing wing; 710, U-shaped body cover; 711, Connecting plate; 712, Body crossbeam cover; 713, Body cover perforation with countersunk holes; 714, Body cover screw holes; 8, Grooved cover; 9, Center axle cover; 10, Pad; 11, Center axle connecting plate; 12, Front support frame; 13, Body support frame; 14, Reinforcing rib; 15, Screw; 1501, Sleeve; 16, Center axle connecting plate cover; 16 01. Stop surface; 17. Third connecting piece; 18. Rear bracket support rod; 19. Central shaft connecting plate; 20. Central shaft connecting plate reinforcement plate; 21. Crossbeam; 22. Tail crossbeam; 23. Fixed connecting plate; 24. Chassis; 25. Connecting cover plate; 2501. Connecting upper cover plate; 2502. Connecting lower cover plate; 26. Connecting part 26; 27. First mortise and tenon structure; 28. Second mortise and tenon structure; 29. ​​Side through hole; 30. Side screw hole; A. Battery assembly box. Detailed Implementation

[0056] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments:

[0057] Example 1: As Figure 1 , 2As shown in Figure 3, Embodiment 1 of the present invention is used to strengthen the frame rigidity of a first type of two-wheeled electric vehicle. The frame of this type of two-wheeled electric vehicle includes a tubular front main beam 2 with a front tube 1, a tubular body main beam 3 fixedly connected to the front main beam 2, a central axle component 4 fixedly connected to the body main beam 3, and a rear support 5 fixed to the body main beam 3. Since the rear support 5 is fixed to the body main beam 3, it has strong rigidity. The front wheel assembly is rotatably connected to the front tube 1, and the rear wheel assembly is connected to the central axle component 4. The front main beam 2, the body main beam 3, and the central axle component 4 constitute the skeleton of the first type of two-wheeled electric vehicle. Other support frames, such as the rear support 5, are used to support other components of the two-wheeled electric vehicle and transfer the weight of these components to the skeleton of the two-wheeled electric vehicle.

[0058] The reinforcement structure of the electric vehicle frame in this embodiment includes a front reinforcement structure 6 and a body reinforcement structure 7 that is fixedly connected to the front reinforcement structure 6.

[0059] The front reinforcement structure 6 includes a grooved upper front cover plate 601 covering the front main beam 2, a grooved lower front cover plate 602 covering the front main beam 2, and a first connector 603. The upper front cover plate 601 has perforated upper front cover plate wings 604 on both sides. Corresponding to the upper front cover plate wings 604, the lower front cover plate 602 has perforated lower front cover plate wings 605 on both sides. The first connector 603 includes bolts and nuts. The bolts passing through the corresponding perforations of the first connector 603, together with the nuts, fix the upper front cover plate wings 604 and the lower front cover plate wings 605 to each other, so that the upper front cover plate 601 and the lower front cover plate 602 wrap around the front main beam 2.

[0060] The vehicle body reinforcement structure 7 includes a recessed upper body cover 701 covering the main body beam 3, a recessed lower body cover 702 covering the main body beam 3, and a second connector 703. At least one of the upper body cover 701 and the lower body cover 702 is provided with a notch to avoid the transverse members on the main body beam 3. The upper body cover 701 is provided with perforated upper body cover flanges 704 on both the left and right sides. Corresponding to the upper body cover flanges 704, the lower body cover 702 is provided with perforated lower body cover flanges 705 on both the left and right sides. The second connector 703 includes bolts and nuts. The bolts of the second connector 703 passing through the corresponding perforations and the nuts fix the upper body cover flanges 704 and the lower body cover flanges 705 together, so that the upper body cover 701 and the lower body cover 702 wrap around the main body beam 3.

[0061] Preferably, the upper front cover 601 with the upper wing 604 of the front cover, the lower front cover 602 with the lower wing 605 of the front cover, the upper body cover 701 with the upper wing 704 of the body cover, and the lower body cover 702 with the lower wing 705 of the body cover are all stamped from metal sheets (such as steel sheets).

[0062] Preferably, the lower front cover 602 is composed of an upper unit 6021 of the lower front cover located at the front tube 1 and a lower unit 6022 of the lower front cover located at the tubular front main beam 2 below the front tube 1. The upper body cover 701 is composed of several upper body cover units 7011. The lower body cover 702 can be a single piece of lower body cover or composed of several lower body cover units 7021. The front end of the lower body cover 702 is fixedly connected to the lower unit 6022 of the lower front cover located at the tubular front main beam 2 below the front tube 1 through an arc-shaped grooved cover 8, making its shape L-shaped. The use of an integrated L-shaped grooved cover can effectively enhance the rigidity of its connection with the upper front cover 601 and the upper body cover 701.

[0063] Preferably, several upper body cover units 7011 are fixedly connected by body cover connecting rods 706 to further enhance the rigidity of the body reinforcement structure 7.

[0064] Preferably, a grooved center shaft cover plate 9 is provided, and a stop surface 707 is provided at the rear end of the vehicle body reinforcement structure 7. The center shaft cover plate 9 is fixed on the stop surface 707 by bolts and nuts.

[0065] Preferably, pairs of spacers 10 are provided between the upper front cover 601 and the lower front cover 602, and between the upper body cover 701 and the lower body cover 702, respectively, and are clamped onto the front main beam 2 and the body main beam 3. The spacers 10 ensure a tight connection between the front reinforcement structure 6 and the front main beam 2, and between the body reinforcement structure 7 and the body main beam 3, thereby further improving the overall rigidity of the front main beam 2 and the body main beam 3.

[0066] When strengthening the rigidity of the frame of the first type of two-wheeled electric vehicle involved in this embodiment, the first connector 603 fixes the upper wing 604 and the lower wing 605 of the front cover plate, so that the upper front cover plate 601 and the lower front cover plate 602 wrap around the main beam 2 of the front. The second connector 703 fixes the upper wing 704 and the lower wing 705 of the body cover plate, so that the upper body cover plate 701 and the lower body cover plate 702 wrap around the main beam 3 of the body. The central axle component 4 is wrapped by the central axle cover plate 9, which is fixedly connected to the body reinforcement structure 7.

[0067] like Figure 4 , 5As shown in Figure 6, Embodiment 2 of the present invention is used to strengthen the frame rigidity of a second type of two-wheeled electric vehicle. The frame of the second type of two-wheeled electric vehicle is based on the frame of the first type of two-wheeled electric vehicle. A central axle connecting plate 11 with a central axle component 4 is fixedly connected to the main beam 3 of the vehicle body. The left and right sides of the main beam 2 of the front are connected to the front support frame 12, and the left and right sides of the main beam 3 of the vehicle body are connected to the rear support frame 13 with a rear bracket 5. The main beam 2 of the front, the main beam 3 of the vehicle body, and the central axle connecting plate 11 with the central axle component 4 form the skeleton of the two-wheeled electric vehicle. Other support frames are used to support other components of the two-wheeled electric vehicle and transfer the weight of these components to the skeleton of the two-wheeled electric vehicle.

[0068] The electric vehicle frame reinforcement structure in this second embodiment is based on the electric vehicle frame reinforcement structure in the first embodiment, and includes a front reinforcement structure 6 and a body reinforcement structure 7 fixedly connected to the front reinforcement structure 6.

[0069] A notch 6011 is provided on the underside of the upper cab cover 601. The upper flange 604 of the cab cover between the notches 6011 is connected by a connecting rod 606 to further enhance the rigidity of the cab reinforcement structure 6. The notch 6011 is used to avoid the components set on the main beam 2 of the cab while meeting the reinforcement requirements.

[0070] Preferably, the lower part of the front reinforcement structure 6 is provided with a pair of upper fork-shaped plates 607, and the front part of the body reinforcement structure 7 is provided with a pair of lower fork-shaped plates 708. After the fork tips of the pair of upper fork-shaped plates 607 and the fork tips of the pair of lower fork-shaped plates 708 are connected, they are fixed together by screws and nuts. After the fork tips of the pair of upper fork-shaped plates 607 and the fork tips of the pair of lower fork-shaped plates 708 are connected, they form through holes that clamp the left and right front support frames 12 connected to the front main beam 2. In this way, the rigidity of the fixed connection between the front reinforcement structure 6 and the body reinforcement structure 7 is ensured, while avoiding interference from the left and right front support frames 12 connected to the front main beam 2 on the connection between the front reinforcement structure 6 and the body reinforcement structure 7.

[0071] Preferably, a reinforcing rib 14 is fixedly connected to the side of the upper fork plate 607 and the lower fork plate 708 to enhance the rigidity of the connection between the upper fork plate 607 and the lower fork plate 708.

[0072] Preferably, a sleeve 1501 is fitted onto the screw 15 connecting the upper fork plate 607 and the lower fork plate 708. The function of the sleeve 1501 is to ensure that the positions of the pair of upper fork plates 607 and the pair of lower fork plates 708 are fixed after the fixed connection, thereby ensuring the rigidity of the pair of upper fork plates 607 and the pair of lower fork plates 708 after the fixed connection.

[0073] Preferably, it also includes a grooved central shaft connecting plate cover 16, which is fastened onto the central shaft connecting plate 11 from bottom to top. The central shaft connecting plate cover 16 is fixed to the central shaft connecting plate 11 by a third connector 17, which is a bolt and a nut. One end of the grooved central shaft connecting plate cover 16 is fixedly connected to the vehicle body reinforcement structure 7 by a screw and a nut. A horizontally placed grooved central shaft cover 9 is fixedly connected to the stop surface 1601 at the other end of the central shaft connecting plate cover 16 so that the rear central shaft component 4 of the central shaft connecting plate 11 is wrapped between the grooved central shaft cover 9 and the stop surface 1601 at the other end of the central shaft connecting plate cover 16.

[0074] Preferably, a pair of rear support rods 18 are provided, which are respectively provided on the left and right sides of the central shaft connecting plate cover 16. One end of the rear support rod 18 is fixed to the other end of the central shaft connecting plate cover 16, and the other end of the rear support rod 18 is used to support the crossbar 501 of the rear support 5.

[0075] like Figure 16 As shown, the rear bracket 5 of the second type of two-wheeled electric vehicle is used to install shock-absorbing springs. In this way, the force of the rear wheel of the two-wheeled electric vehicle will be transmitted to the rear bracket 5 through the shock-absorbing springs. At the same time, the rear bracket 5 often serves as a support for the cargo rack. Some two-wheeled electric vehicles also need to install battery packs on the rear bracket 5. In this case, the rigidity of a single rear bracket 5 is often insufficient. Installing rear bracket support rods 18 solves this problem. It can effectively enhance the rigidity of the rear bracket 5. Moreover, by using the pair of rear bracket support rods 18, it is convenient to install the battery pack housing A for installing the battery pack.

[0076] When strengthening the rigidity of the frame of the second type of two-wheeled electric vehicle involved in this embodiment 2, the first connector 603 fixes the upper wing 604 and the lower wing 605 of the front cover plate, so that the upper front cover plate 601 and the lower front cover plate 602 wrap around the main beam 2 of the front. The second connector 703 fixes the upper wing 704 and the lower wing 705 of the body cover plate, so that the upper body cover plate 701 and the lower body cover plate 702 wrap around the main beam 3 of the body. The central shaft connecting plate cover plate 16, which is fixedly connected to the body reinforcement structure 7, wraps around the central shaft connecting plate 11 with the central shaft component 4. The rear support is supported on the crossbar 501 of the rear support 5 by a pair of rear support support rods 18, thereby strengthening the rigidity of the rear support 5.

[0077] like Figure 7 , 8As shown in Figure 9, Embodiment 3 of the present invention is used to strengthen the frame rigidity of a third type of two-wheeled electric vehicle. The frame of this third type of two-wheeled electric vehicle includes a tubular front main beam 2 with a front tube 1, a tubular body main beam 3 fixedly connected to the front main beam 2, and a pair of central axle connecting plates 19 for fixedly connecting to a horizontal fork with a central axle component. The front wheel assembly is rotatably connected to the front tube 1, and the rear wheel assembly is connected to the central axle component. The left and right sides of the body main beam 3 are connected to body support frames 13 with rear brackets 5. The front main beam 2 and the body main beam 3 constitute the skeleton of the two-wheeled electric vehicle. The other support frames are used to support other components of the third type of two-wheeled electric vehicle and transfer the weight of these components to the skeleton of the third type of two-wheeled electric vehicle.

[0078] The electric vehicle frame reinforcement structure in this embodiment three is based on the electric vehicle frame reinforcement structure in the above embodiment one, and includes a front reinforcement structure 6 and a body reinforcement structure 7 fixedly connected to the front reinforcement structure 6.

[0079] The front reinforcement structure 6 includes a grooved upper front cover plate 601 wrapped around the front main beam 2, a fastener 608 that fixes the upper front cover plate 601 to the front main beam 2, and the vehicle body main beam.

[0080] Preferably, the fastener 608 includes a grooved lower cover 6081 for the front tube and several screws 6082 with sleeves inserted through them. The lower cover 6081 is fitted with the front cover plate 601 and fixed to the front tube 1. The screws 6082 with sleeves inserted through them pass through the grooved upper front cover plate 601 and are fixed to the front main beam 2 by nuts.

[0081] Preferably, a pair of central shaft connecting plate reinforcing plates 20 are provided, one end of each pair of central shaft connecting plate reinforcing plates 20 is fixed to the left and right sides of the vehicle body reinforcing structure 7 respectively, and the pair of central shaft connecting plate reinforcing plates 20 are used to fix to a pair of central shaft connecting plates 19 respectively to enhance the rigidity of the pair of central shaft connecting plates 19.

[0082] Preferably, the upper vehicle body cover 701 is provided with reinforcing wings 709 extending to the left and right sides.

[0083] When strengthening the rigidity of the frame of the two-wheeled electric vehicle, the fastener 608 fixes the upper front cover 601, which is wrapped around the main beam 2 of the front of the vehicle, to the main beam 2 of the front of the vehicle. The second connector 703 fixes the upper wing 704 and the lower wing 705 of the body cover to the body cover, so that the upper body cover 701 and the lower body cover 702 wrap around the main beam 3 of the vehicle. One end of a pair of central axle connecting plate reinforcement plates 20 is fixed to the left and right sides of the body reinforcement structure 7, and the pair of central axle connecting plate reinforcement plates 20 are fixed to a pair of central axle connecting plates 19 to strengthen the rigidity of the pair of central axle connecting plates 19. The reinforcing wings 709 that are set on both sides of the upper body cover 701 and extend to the left and right sides are fixedly connected to the body support frame 13 connected to the left and right sides of the main beam 3 of the vehicle to strengthen the rigidity of the body support frame 13 and its ability to support the load.

[0084] like Figure 10 , 11 As shown in Figure 12, Embodiment 4 of the present invention is used to strengthen the frame rigidity of a fourth type of two-wheeled electric vehicle. The frame of this fourth type of two-wheeled electric vehicle includes a tubular front main beam 2 with a front tube 1, a tubular U-shaped body main beam 3 fixedly connected to the front main beam 2, a tubular crossbeam 21, and a central axle connecting plate 19 for connecting a flat fork with a central axle component. The two sides of the tubular crossbeam 21 near the front main beam 2 are slightly raised and fixedly connected to the U-shaped body main beam 3. The central axle connecting plate 19 is connected to the rear crossbeam. 22 is fixedly connected to the U-shaped main beam 3 of the vehicle body. The front wheel assembly is rotatably connected to the head tube 1, and the rear wheel assembly is connected to the central axle component. A U-shaped body support frame 13 with a rear bracket 5 is connected above the U-shaped main beam 3 of the vehicle body. The head main beam 2 and the U-shaped main beam 3 with a central axle connecting plate 19 constitute the frame of the fourth type of two-wheeled electric vehicle. Other support frames are used to support other components of the fourth type of two-wheeled electric vehicle and transfer the weight of these components to the frame of the fourth type of two-wheeled electric vehicle.

[0085] The electric vehicle frame reinforcement structure in this embodiment four is based on the electric vehicle frame reinforcement structure in the above embodiment one, and includes a front reinforcement structure 6 and a body reinforcement structure 7 fixedly connected to the front reinforcement structure 6.

[0086] The vehicle body reinforcement structure 7 includes a U-shaped body cover plate 710 with a grooved cross section that covers the U-shaped main body beam 3, and a connecting plate 711 provided in the middle of the U-shaped body cover plate 710 to ensure the rigidity of the U-shaped body cover plate 710. The U-shaped body cover plate 710 is provided with a notch that avoids the components on the main body beam 3 that protrude from the outer surface of the main body beam 3.

[0087] Preferably, a pair of central shaft connecting plate reinforcing plates 20 are provided, one end of each pair of central shaft connecting plate reinforcing plates 20 is fixed to the left and right sides of the U-shaped opening of the U-shaped body cover 710, and the pair of central shaft connecting plate reinforcing plates 20 are used to fix to a pair of central shaft connecting plates 19 respectively to enhance the rigidity of the pair of central shaft connecting plates 19.

[0088] Preferably, a rear support rod 18 is fixed on each of the pair of central shaft connecting plate reinforcing plates 20, and the upper part of the rear support rod 18 is connected to the upper part of the rear support 5 to enhance the rigidity of the rear support 5.

[0089] Preferably, a body beam cover plate 712 with a grooved cross section is provided on the U-shaped body cover plate 710 near the front reinforcement structure 6, and the body beam cover plate 712 is fixedly connected to the U-shaped body cover plate 710.

[0090] Preferably, a fixing connecting plate 23 is fixedly connected between the upper front cover 601 and the U-shaped body cover 710. In this way, the connection of the fixing connecting plate 23 makes the upper front cover 601 and the U-shaped body cover 710 a whole with strong rigidity. At the same time, it also facilitates the installation according to the structure of the front main beam 2 and the tubular U-shaped body main beam 3, thereby facilitating installation and use.

[0091] Preferably, a chassis 24 is fixedly connected to the bottom of the U-shaped vehicle body cover 710. The chassis serves two purposes: firstly, it enhances the rigidity of the U-shaped vehicle body cover 710, and secondly, it facilitates the installation of on-board equipment.

[0092] When strengthening the rigidity of the frame of the fourth type of two-wheeled electric vehicle, the first connector 603 fixes the upper wing 604 and the lower wing 605 of the front cover plate, so that the upper front cover plate 601 and the lower front cover plate 602 wrap around the main beam 2 of the front. The U-shaped body cover plate 710 with a concave cross section wraps around the U-shaped main beam 3 of the body. At the same time, the body crossbeam cover plate 712 with a concave cross section wraps around the middle part of the tubular crossbeam 21 and makes the two sides of the tubular crossbeam 21 rest on the body crossbeam cover plate 712. Then, the central axle connecting plate reinforcement plate 20 is fixed to the central axle connecting plate 18 to strengthen the rigidity of the pair of central axle connecting plates 18. The upper part of the rear support rod 18 is fixedly connected to the upper part of the rear support 5 to enhance the support force of the rear support 5.

[0093] like Figure 13 , 14 As shown in Figure 15, Embodiment 5 of the present invention is used to strengthen the frame rigidity of the second type of two-wheeled electric vehicle described above.

[0094] The electric vehicle frame reinforcement structure in this embodiment five is based on the electric vehicle frame reinforcement structure in embodiment two above, and includes a front reinforcement structure 6 and a body reinforcement structure 7 fixedly connected to the front reinforcement structure 6.

[0095] The front reinforcement structure 6 includes a grooved upper front cover plate 601 covering the front main beam 2, a grooved lower front cover plate 602 covering the front main beam 2, and a first connector 603. The upper front cover plate 601 has front cover through holes 609 with countersunk holes on both the left and right sides. Corresponding to the front cover through holes 609, the lower front cover plate 602 has front cover screw holes 610 on both the left and right sides. The bolts of the first connector passing through the front cover through holes 609 on both the left and right sides of the upper front cover plate 601 are tightened onto the corresponding front cover screw holes 610 on both the left and right sides of the lower front cover plate 602, thus fixing the upper front cover plate 601 and the lower front cover plate 602 together, so that the upper front cover plate 601 and the lower front cover plate 602 wrap around the front main beam 2.

[0096] The vehicle body reinforcement structure 7 includes a recessed upper body cover plate 701 covering the main body beam 3, a recessed lower body cover plate 702 covering the main body beam 3, and a second connector 703. The upper body cover plate 701 has body cover through holes 713 with countersunk holes on both the left and right sides. The lower body cover plate 702 has body cover screw holes 714 on both the left and right sides corresponding to the body cover through holes 713. The second connector 703 includes bolts. The bolts of the second connector passing through the body cover through holes 713 on both the left and right sides of the upper body cover plate 701 are tightened into the corresponding body cover screw holes 714 on both the left and right sides of the lower body cover plate, thus fixing the upper body cover plate 701 and the lower body cover plate 702 together, so that the upper body cover plate 701 and the lower body cover plate 702 wrap around the main body beam 3.

[0097] Preferably, a curved connecting cover plate 25 is provided, the curvature of which matches the curvature of the connecting portion 26 between the front main beam 2 and the body main beam 3. The connecting cover plate 25 includes a groove-shaped upper connecting cover plate 2501 with downward recesses on both sides and a groove-shaped lower connecting cover plate 2502 with upward recesses on both sides. The upper connecting cover plate 2501 and the lower connecting cover plate 2502 are fixedly connected by bolts passing through both sides of the connecting cover plate 25, thus enclosing the connecting portion 26. The lower and upper recesses are clamped together. On the left and right front support frames 12 of the main beam 2 of the front of the vehicle, a first tenon structure 27 is provided between one end of the upper cover plate 2501 and the upper front cover plate 601, between one end of the lower cover plate 2502 and the lower front cover plate 602, between the other end of the upper cover plate 2501 and the upper body cover plate 701, and between the other end of the lower cover plate 2502 and the lower body cover plate 702. The front reinforcement structure 6, the connecting cover plate 25 and the body reinforcement structure 7 are fixedly connected together by the first tenon structure 27.

[0098] Preferably, a second tenon structure 28 is provided between the lower vehicle body cover 702 and the grooved central shaft connecting plate cover 16. Side through holes 29 are provided on both sides of the grooved central shaft connecting plate cover 16. The vehicle body reinforcement structure 7 that matches the side through holes 29 is provided with side screw holes 30. The vehicle body reinforcement structure 7 and the central shaft connecting plate cover 16 are fixedly connected by the second tenon structure 28 and the screw that passes through the side through holes 29 and is screwed into the side screw holes 30.

[0099] Preferably, the front reinforcement structure 6, the body reinforcement structure 7, and the central axle connecting plate cover 16 are die-cast aluminum alloy components.

Claims

1. A reinforcement structure for an electric vehicle frame, characterized in that, This includes a front-end reinforcement structure and a body reinforcement structure that is fixedly connected to the front-end reinforcement structure; The front reinforcement structure includes a grooved upper front cover plate covering the main beam of the front of the vehicle, a grooved lower front cover plate covering the main beam of the front of the vehicle, and a first connector. The upper front cover plate has upper front cover plate connecting structures on its left and right sides, and the lower front cover plate has lower front cover plate connecting structures on its left and right sides corresponding to the upper front cover plate connecting structures. The first connector fixes the upper front cover plate connecting structures and the lower front cover plate connecting structures together, so that the upper front cover plate and the lower front cover plate wrap around the main beam of the front of the vehicle. The vehicle body reinforcement structure includes a grooved upper body cover plate covering the main body beam, a grooved lower body cover plate covering the main body beam, and a second connector. At least one of the upper body cover plate and the lower body cover plate is provided with a notch to avoid the components protruding from the outer surface of the main body beam. Upper body cover plate connecting structures are provided on the left and right sides of the upper body cover plate, and lower body cover plate connecting structures are provided on the left and right sides of the lower body cover plate corresponding to the upper body cover plate connecting structures. The second connector fixes the upper body cover plate connecting structures and the lower body cover plate connecting structures together so that the upper body cover plate and the lower body cover plate wrap around the main body beam. The lower front cover consists of an upper unit located at the front tube and a lower unit located at the tubular front main beam below the front tube. The upper body cover consists of several upper body cover units, and the lower body cover consists of several lower body cover units. The front lower body cover unit is fixedly connected to the lower unit at the tubular front main beam below the front tube via an arc-shaped grooved cover, forming an L-shape. Alternatively, a curved connecting cover is provided, the curvature of which matches the curvature of the connection between the front main beam and the body main beam of the electric vehicle frame. The connecting cover includes a grooved upper connecting cover and a grooved lower connecting cover, which are connected by bolts passing through both sides of the connecting cover. The connection is fixed by wrapping the connecting parts. A first mortise and tenon structure is provided between one end of the upper cover plate and the upper front cover plate, between one end of the lower cover plate and the lower front cover plate, between the other end of the upper cover plate and the upper body cover plate, and between the other end of the lower cover plate and the lower body cover plate. The front reinforcement structure, the connecting cover plate, and the body reinforcement structure are fixedly connected together through the first mortise and tenon structure. Alternatively, a pair of upper fork-shaped plates are provided at the lower part of the front reinforcement structure, and a pair of lower fork-shaped plates are provided at the front of the body reinforcement structure. After the fork tips of the pair of upper fork-shaped plates mate with the fork tips of the pair of lower fork-shaped plates, they are fixedly connected together by screws and nuts. After the fork tips of the pair of upper fork-shaped plates mate with the fork tips of the pair of lower fork-shaped plates, they form through holes that are clamped to the left and right front support frames connected to the main beam of the front of the vehicle. The upper cab cover connection structure consists of cab cover through holes on the left and right sides of the upper cab cover, and the corresponding lower cab cover connection structure consists of cab cover screw holes on the left and right sides of the lower cab cover. The first connector includes bolts. The bolts of the first connector, which pass through the cab cover through holes on the left and right sides of the upper cab cover, are tightened onto the corresponding cab cover screw holes on the left and right sides of the lower cab cover, thus fixing the upper cab cover and the lower cab cover together so that the upper cab cover and the lower cab cover wrap around the main beam of the cab. The upper body cover connecting structure consists of body cover through-holes on the left and right sides of the upper body cover, and the corresponding lower body cover connecting structure consists of body cover screw holes on the left and right sides of the lower body cover. The second connecting component includes bolts. The bolts of the second connecting component, passing through the body cover through-holes on the left and right sides of the upper body cover, are tightened onto the corresponding body cover screw holes on the left and right sides of the lower body cover, thus fixing the upper and lower body covers together and allowing them to enclose the main body beam. Alternatively, the upper front cover connecting structure consists of perforated front cover upper wings on the left and right sides of the upper front cover, and the corresponding lower front cover connecting structure consists of perforated lower front cover wings on the left and right sides of the lower front cover. The upper body cover connecting structure consists of perforated body... The upper and lower body cover panels are connected by perforated lower body cover panels on both sides of the upper and lower body cover panels. The first connector includes bolts and nuts. The bolts and nuts of the first connector pass through the perforations on the upper and lower body cover panels on both sides of the upper and lower body cover panels and the corresponding perforations on the lower body cover panels on both sides of the lower body cover panel, thus fixing the upper and lower body cover panels together and enclosing the main beam of the vehicle. The second connector also includes bolts and nuts. The bolts and nuts of the second connector pass through the perforations on the upper and lower body cover panels on both sides of the upper and lower body cover panels and the corresponding perforations on the lower body cover panels on both sides of the lower body cover panel, thus fixing the upper and lower body cover panels together and enclosing the main beam of the vehicle.

2. The reinforcing structure for the electric vehicle frame according to claim 1, characterized in that, A grooved center axle cover is provided, and a stop surface is provided at the rear end of the vehicle body reinforcement structure. The center axle cover is fixed to the stop surface by bolts, and the rear center axle component of the electric vehicle frame's center axle connecting plate is wrapped between the grooved center axle cover and the stop surface at the rear end of the vehicle body reinforcement structure; or, it includes a grooved center axle connecting plate cover and a center axle cover, with the grooved center axle connecting plate cover being snapped onto the electric vehicle frame's center axle connecting plate from bottom to top. One end of the grooved center axle connecting plate cover is fixedly connected to the vehicle body reinforcement structure, and a horizontally placed grooved center axle cover is fixedly connected to the stop surface at the other end of the center axle connecting plate cover so that the rear center axle component of the electric vehicle frame's center axle connecting plate is wrapped between the grooved center axle cover and the stop surface at the other end of the center axle connecting plate cover.

3. A reinforcement structure for an electric vehicle frame, characterized in that, This includes a front-end reinforcement structure and a body reinforcement structure that is fixedly connected to the front-end reinforcement structure; The front reinforcement structure includes a grooved upper front cover plate wrapped around the front main beam and fasteners that fix the upper front cover plate to the front main beam; The vehicle body reinforcement structure includes a grooved upper body cover plate covering the main body beam, a grooved lower body cover plate covering the main body beam, and a second connector. At least one of the upper body cover plate and the lower body cover plate is provided with a notch to avoid the components protruding from the outer surface of the main body beam. Upper body cover plate connecting structures are provided on the left and right sides of the upper body cover plate, and lower body cover plate connecting structures are provided on the left and right sides of the lower body cover plate corresponding to the upper body cover plate connecting structures. The second connector fixes the upper body cover plate connecting structures and the lower body cover plate connecting structures together so that the upper body cover plate and the lower body cover plate wrap around the main body beam. The upper body cover connection structure consists of body cover through-holes on the left and right sides of the upper body cover, and the corresponding lower body cover connection structure consists of body cover screw holes on the left and right sides of the lower body cover. The second connector includes bolts, which pass through the body cover through-holes on the left and right sides of the upper body cover and are tightened into the corresponding body cover screw holes on the left and right sides of the lower body cover, thus fixing the upper and lower body covers together and allowing them to wrap around the main body beam; alternatively, the upper body cover connection structure is set at... The upper body cover has perforated upper wing panels on both sides, and the corresponding lower body cover connecting structure is set on the perforated lower wing panels on both sides of the lower body cover. The second connector includes bolts and nuts. The bolts and nuts of the second connector pass through the perforations on the upper wing panels on both sides of the upper body cover and the corresponding perforations on the lower wing panels on both sides of the lower body cover to fix the upper body cover and the lower body cover to the upper body cover and the lower body cover, so that the upper body cover and the lower body cover wrap around the main beam of the body. The fasteners include a grooved lower cover for the front tube and several threaded rods with tube sleeves. The lower cover for the front tube is fitted with the upper front cover plate and fixed to the front tube. Several threaded rods with tube sleeves pass through the grooved upper front cover plate and are fixed to the front main beam by nuts. The upper front cover plate has reinforcing wings that flare out to the left and right sides.

4. The reinforcing structure for an electric vehicle frame according to claim 1, 2, or 3, characterized in that, The lower part of the front reinforcement structure is provided with a pair of upper fork-shaped plates, and the front part of the body reinforcement structure is provided with a pair of lower fork-shaped plates. After the fork tips of the pair of upper fork-shaped plates are connected with the fork tips of the pair of lower fork-shaped plates, they are fixed together by screws and nuts. After the fork tips of the pair of upper fork-shaped plates are connected with the fork tips of the pair of lower fork-shaped plates, they form through holes that are clamped to the left and right front support frames connected to the main beam of the front of the vehicle.

5. A reinforcement structure for an electric vehicle frame, characterized in that, This includes a front-end reinforcement structure and a body reinforcement structure that is fixedly connected to the front-end reinforcement structure; The front reinforcement structure includes a grooved upper front cover plate covering the main beam of the front of the vehicle, a grooved lower front cover plate covering the main beam of the front of the vehicle, and a first connector. The upper front cover plate has upper front cover plate connecting structures on its left and right sides, and the lower front cover plate has lower front cover plate connecting structures on its left and right sides corresponding to the upper front cover plate connecting structures. The first connector fixes the upper front cover plate connecting structures and the lower front cover plate connecting structures together, so that the upper front cover plate and the lower front cover plate wrap around the main beam of the front of the vehicle. The vehicle body reinforcement structure includes a U-shaped body cover with a grooved cross section that covers the U-shaped main body beam, a connecting plate in the middle of the U-shaped body cover to ensure the rigidity of the U-shaped body cover, and a notch on the U-shaped body cover that avoids the protrusion on the outer surface of the main body beam. The upper cab cover connection structure consists of cab cover through-holes on the left and right sides of the upper cab cover, and the corresponding lower cab cover connection structure consists of cab cover screw holes on the left and right sides of the lower cab cover. The first connector includes bolts; the bolts of the first connector, passing through the cab cover through-holes on the left and right sides of the upper cab cover, are tightened onto the corresponding cab cover screw holes on the left and right sides of the lower cab cover, thus fixing the upper and lower cab covers together and allowing them to enclose the main beam of the cab. Alternatively, the upper cab cover connection structure is set at... The upper and lower cab cover plates have perforated upper wing plates on the left and right sides. The corresponding upper cab cover plate connecting structure is set on the lower cab cover plate with perforated lower wing plates on the left and right sides of the lower cab cover plate. The first connecting member includes bolts and nuts. The bolts and nuts of the first connecting member pass through the perforations on the upper wing plates of the upper and lower cab cover plates on the left and right sides of the upper cab cover plate and the corresponding perforations on the lower wing plates of the lower cab cover plate on the left and right sides of the lower cab cover plate, and fix the upper cab cover plate and the lower cab cover plate to the same location, so that the upper cab cover plate and the lower cab cover plate wrap around the main beam of the cab. A pair of rear support rods are provided, which are respectively set on the left and right sides of the central shaft connecting plate cover. One end of the rear support rod is fixed to the other end of the central shaft connecting plate cover, and the other end of the rear support rod is connected to the rear support. Alternatively, a pair of central shaft connecting plate reinforcing plates are also provided, with one end of each pair of central shaft connecting plate reinforcing plates fixed to the left and right sides of the U-shaped opening of the U-shaped body cover. The pair of central shaft connecting plate reinforcing plates are used to fix themselves to the pair of central shaft connecting plates respectively. The lower parts of the pair of rear support rods are respectively fixed to the pair of central shaft connecting plate reinforcing plates, and the upper parts of the pair of rear support rods are connected to the upper part of the rear support.

6. The reinforcing structure for the electric vehicle frame according to claim 2, characterized in that, A pair of rear support rods are provided, which are respectively set on the left and right sides of the central shaft connecting plate cover. One end of the rear support rod is fixed to the other end of the central shaft connecting plate cover, and the other end of the rear support rod is connected to the rear support. Alternatively, a pair of central shaft connecting plate reinforcing plates are also provided, with one end of each pair of central shaft connecting plate reinforcing plates fixed to the left and right sides of the U-shaped opening of the U-shaped body cover. The pair of central shaft connecting plate reinforcing plates are used to fix themselves to the pair of central shaft connecting plates respectively. The lower parts of the pair of rear support rods are respectively fixed to the pair of central shaft connecting plate reinforcing plates, and the upper parts of the pair of rear support rods are connected to the upper part of the rear support.

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