Frame and electric vehicle

Abstract

This utility model discloses a bicycle frame and an electric bicycle. The frame includes a reinforcing plate and a head tube, a slant tube, a bottom plate, and a rear fork connected in sequence. The slant tube is an extruded profile extending in the vertical direction and surrounds the battery compartment. The reinforcing plate connects the head tube and the slant tube. The frame provided by this utility model has the advantages of high connection strength between the head tube and the slant tube, and the connection between the two is not easily deformed or cracked.

Description

Technical Field

[0001] This utility model relates to the field of scooter technology, specifically to a frame and an electric vehicle. Background Technology

[0002] In related technologies, scooter frames are typically formed by die casting in one piece or by splicing sheet metal. The former results in heavy weight and high cost, while the latter suffers from low dimensional accuracy and is prone to cracking after long-term use. In addition, for scooters with battery compartments formed at the slant tubes of the frame, the forward placement of the battery causes the center of gravity to shift forward. Under high-frequency use, the connection between the head tube and the slant tube is prone to poor bending and torsional resistance due to long-term exposure to large impact loads, making it susceptible to cracks or even breakage. Utility Model Content

[0003] This utility model aims to at least partially solve one of the technical problems in the related art.

[0004] Therefore, embodiments of this utility model propose a frame that has the advantages of high connection strength between the head tube and the slant tube, and that the connection between the two is not easily deformed or cracked.

[0005] An embodiment of this utility model also proposes an electric vehicle.

[0006] The frame of this utility model embodiment includes a reinforcing plate and a head tube, a slant tube, a bottom plate and a rear fork connected in sequence. The slant tube is a profile extrusion extending in the vertical direction and surrounds the battery compartment. The reinforcing plate connects the head tube and the slant tube.

[0007] According to the vehicle frame of this utility model embodiment, by setting the inclined tube as a profile extrusion part extending in the vertical direction, it is easier to form the battery compartment for accommodating the battery, while also having higher dimensional accuracy and higher welding reliability with the head tube and the bottom plate. In addition, the addition of a reinforcing plate to connect the head tube and the inclined tube further improves the connection strength between the head tube and the inclined tube, enabling better torsional resistance, making the weld joint less prone to cracking, and thus increasing the service life and safety of the vehicle frame.

[0008] In some embodiments, the head tube is a profile extrusion and includes a first side plate, a tube body, and a second side plate connected sequentially in the left-right direction. The front side of the inclined tube is provided with a first limiting groove and a second limiting groove arranged at intervals in the left-right direction. The rear end of the first side plate is fitted into the first limiting groove and connected to the inclined tube. The rear end of the second side plate is fitted into the second limiting groove and connected to the inclined tube.

[0009] In some embodiments, the tube body and the inclined tube are arranged at intervals in the front-to-back direction, and the first side plate, the tube body, the second side plate and the inclined tube surround to form a mounting cavity, the upper surface and the lower surface of the mounting cavity being open;

[0010] The reinforcing plate includes an upper reinforcing plate and a lower reinforcing plate. The upper reinforcing plate is located at the open portion of the upper surface of the mounting cavity and connects to each of the tube body, the first side plate, the second side plate, and the inclined tube. The lower reinforcing plate is located at the open portion of the lower surface of the mounting cavity and connects to each of the tube body, the first side plate, the second side plate, and the inclined tube.

[0011] In some embodiments, the frame further includes a battery lock fixing block, which is welded to the front side of the inclined tube.

[0012] In some embodiments, the frame further includes a tray disposed at the bottom of the battery compartment and connected to the inclined tube.

[0013] In some embodiments, the tray is provided with a first mounting hole for mounting a battery connector seat and a second mounting hole for mounting a foot support assembly.

[0014] In some embodiments, the front of the base plate is provided with a first mounting groove that extends through the base plate in a vertical direction, and the inclined tube is fitted into the first mounting groove and connected to the base plate.

[0015] In some embodiments, the frame further includes a reinforcing plate disposed at the bottom of the first mounting groove, the reinforcing plate being located below the inclined tube and connecting the base plate and the inclined tube.

[0016] In some embodiments, the base plate includes a first rib and a second rib arranged at intervals in the left-right direction, and the two opposite sides of the first mounting groove in the left-right direction are respectively formed on the first rib and the second rib, and each of the first rib and the second rib forms a first U-shaped groove with the opening facing downward.

[0017] The frame also includes a left reinforcing plate and a right reinforcing plate, which are respectively connected to the first rib and the second rib and are respectively disposed in the two first U-shaped grooves.

[0018] In some embodiments, the left reinforcing plate and the right reinforcing plate are the same size and each includes a first plate and a second plate connected at an angle, the first plate being disposed at the opening of the first U-shaped groove, and the second plate extending to the bottom surface of the first U-shaped groove.

[0019] In some embodiments, the base plate includes a plate body and a third rib and a fourth rib disposed on the rear side of the plate body, the third rib and the fourth rib being arranged at intervals in the left-right direction;

[0020] The rear fork is located between the third rib and the fourth rib and includes a first fork body, a connecting plate and a second fork body connected sequentially in the left-right direction. The first fork body is connected to the third rib, the second fork body is connected to the fourth rib, and the connecting plate is connected to the plate body.

[0021] In some embodiments, the third rib and the fourth rib are provided with second U-shaped grooves on their opposite sides, the first fork is disposed in one of the second U-shaped grooves, and the second fork is disposed in the other second U-shaped groove.

[0022] In some embodiments, the rear fork further includes a first reinforcing rib and a second reinforcing rib, wherein the first reinforcing rib connects the connecting plate and the first fork body, and the second reinforcing rib connects the connecting plate and the second fork body.

[0023] In some embodiments, both the third and fourth ribs are bent upward relative to the plate.

[0024] In some embodiments, the top surface of the plate is a plane perpendicular to the extension direction of the battery compartment.

[0025] The electric vehicle according to the present invention includes a frame as described in any of the above embodiments.

[0026] The technical advantages of the electric vehicle according to the present utility model embodiment are the same as the technical advantages of the vehicle frame in the above embodiment, and will not be repeated here. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the vehicle frame according to an embodiment of the present utility model.

[0028] Figure 2 This is another schematic diagram of the vehicle frame according to an embodiment of the present utility model.

[0029] Figure 3 This is an exploded view of the vehicle frame according to an embodiment of the present utility model.

[0030] Figure 4 This is a schematic diagram of the inclined tube in the frame according to an embodiment of the present utility model.

[0031] Figure 5 This is another schematic diagram of the inclined tube in the frame according to an embodiment of the present utility model.

[0032] Figure 6 This is a schematic diagram of the rear fork in the frame according to an embodiment of the present utility model.

[0033] Figure label:

[0034] 1. Head tube; 11. Tube body; 12. First side plate; 13. Second side plate; 2. Slanted tube; 21. Battery compartment; 22. First limiting groove; 23. Second limiting groove; 3. Base plate; 31. Plate body; 32. First rib; 321. First U-shaped groove; 33. Second rib; 34. Third rib; 341. Second U-shaped groove; 35. Fourth rib; 4. Rear fork; 41. First fork body; 42. Second fork body; 43. Connecting plate; 44. First reinforcing rib; 45. Second reinforcing rib; 5. Upper reinforcing plate; 6. Lower reinforcing plate; 7. Left reinforcing plate; 71. First plate; 72. Second plate; 8. Right reinforcing plate; 9. Battery lock fixing block; 10. Support plate; 110. Reinforcing plate. Detailed Implementation

[0035] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0036] The following is combined Figures 1-6 The vehicle frame according to an embodiment of the present utility model is described.

[0037] The frame of this utility model embodiment includes a reinforcing plate and a head tube 1, a slant tube 2, a bottom plate 3, and a rear fork 4 connected in sequence. The slant tube 2 is a profile extrusion extending in the vertical direction, and the slant tube 2 forms a battery compartment 21. The reinforcing plate connects the head tube 1 and the slant tube 2.

[0038] According to the vehicle frame of this utility model embodiment, by setting the inclined tube 2 as a profile extrusion extending in the vertical direction, it is easier to form the battery compartment 21 for accommodating the battery, while also having higher dimensional accuracy and higher welding reliability with the head tube 1 and the base plate 3. In addition, the setting of a reinforcing plate to connect the head tube 1 and the inclined tube 2 further improves the connection strength between the head tube 1 and the inclined tube 2, enabling better torsional resistance, making the weld joint less prone to cracking, and increasing the service life and safety of the vehicle frame.

[0039] It should be noted that the slant tube 2 is a lighter and stronger aluminum profile extrusion part. Its extension direction in which it surrounds the battery compartment 21 is perpendicular to the base plate 3. The head tube 1 is welded to the front side of the slant tube 2, the slant tube 2 is welded to the base plate 3, and the base plate 3 is welded to the rear fork 4.

[0040] In some embodiments, the head tube 1 is a profile extrusion and includes a first side plate 12, a tube body 11 and a second side plate 13 connected sequentially in the left-right direction. The front side of the inclined tube 2 is provided with a first limiting groove 22 and a second limiting groove 23 arranged at intervals in the left-right direction. The rear end of the first side plate 12 is fitted in the first limiting groove 22 and connected to the inclined tube 2, and the rear end of the second side plate 13 is fitted in the second limiting groove 23 and connected to the inclined tube 2.

[0041] By setting the head tube 1 as an extruded profile, its dimensional accuracy is effectively guaranteed, thereby effectively reducing the welding cost between the head tube 1 and the inclined tube 2. In addition, the head tube 1 is connected to the inclined tube 2 through the first side plate 12 and the second side plate 13, and the rear ends of the first side plate 12 and the second side plate 13 respectively fit into the first limiting groove 22 and the second limiting groove 23. This not only ensures the relative fixation of the first side plate 12 and the second side plate 13 with respect to the inclined tube 2 in the left and right directions, but also realizes the positioning of the first side plate 12 and the second side plate 13 with respect to the inclined tube 2, making the welding efficiency between the head tube 1 and the inclined tube 2 higher and the welding accuracy higher.

[0042] For example, head tube 1 is a lighter and stronger aluminum profile extrusion, such as... Figure 3 and Figure 4 As shown, the front end of the first side plate 12 and the front end of the second side plate 13 are connected and located on the front side of the tube body 11. The first limiting groove 22 and the second limiting groove 23 both extend in the vertical direction. After the first side plate 12 and the second side plate 13 are connected to the inclined tube 2, the opposite sides of the first side plate 12 and the second side plate 13 are generally smoothly connected to the outer surface of the inclined tube 2.

[0043] In some embodiments, the tube body 11 and the inclined tube 2 are arranged at intervals in the front-to-back direction, and the first side plate 12, the tube body 11, the second side plate 13, and the inclined tube 2 surround to form a mounting cavity, the upper and lower surfaces of the mounting cavity being open. The reinforcing plate includes an upper reinforcing plate 5 and a lower reinforcing plate 6. The upper reinforcing plate 5 is disposed at the open portion of the upper surface of the mounting cavity and connects each of the tube body 11, the first side plate 12, the second side plate 13, and the inclined tube 2. The lower reinforcing plate 6 is disposed at the open portion of the lower surface of the mounting cavity and connects each of the tube body 11, the first side plate 12, the second side plate 13, and the inclined tube 2.

[0044] At this time, the upper reinforcing plate 5 and the lower reinforcing plate 6 respectively support the upper and lower openings of the mounting cavity, so that the mounting cavity generally forms a closed cavity structure, thereby further improving the bending and torsion resistance between the head tube 1 and the inclined tube 2, and further ensuring the connection strength between the head tube 1 and the inclined tube 2.

[0045] For example, such as Figures 1-3 As shown, on the projection plane perpendicular to the extension direction of the mounting cavity, the projected outer contour of the upper reinforcing plate 5 matches the projected outer contour of the upper opening of the mounting cavity. The upper reinforcing plate 5 is welded to each of the tube body 11, the first side plate 12, the second side plate 13, and the inclined tube 2. The projected outer contour of the lower reinforcing plate 6 matches the projected outer contour of the lower opening of the mounting cavity. The lower reinforcing plate 6 is welded to each of the tube body 11, the first side plate 12, the second side plate 13, and the inclined tube 2.

[0046] In some embodiments, the frame also includes a battery lock fixing block 9, which is welded to the front side of the inclined tube 2.

[0047] The battery lock fixing block 9 provides a mounting point for the battery lock, effectively ensuring the installation strength of the battery lock on the inclined tube 2.

[0048] like Figures 2-4 As shown, there are two battery lock fixing blocks 9 arranged at intervals in the vertical direction. The two battery lock fixing blocks 9 are located in the mounting cavity and are welded to the front wall plate of the inclined tube 2.

[0049] In some embodiments, the frame further includes a support plate 10, which is disposed at the bottom of the battery compartment 21 and connected to the inclined tube 2. The support plate 10 has a first mounting hole for mounting a battery connector seat and a second mounting hole for mounting a foot support assembly.

[0050] The tray 10 covers the open bottom of the battery compartment 21 and supports the battery inside the battery compartment 21. The first mounting hole facilitates the fixed installation of the battery connector seat inside the battery compartment 21. The second mounting hole facilitates the installation of the foot support assembly, so that the frame does not need to add other parts connected to the foot support assembly, reducing the number of frame parts and improving the assembly efficiency of the frame.

[0051] For example, such as Figure 2 , Figure 3 and Figure 5 As shown, the support plate 10 is welded to the inclined tube 2. The first mounting hole is located inside the battery compartment 21, and the second mounting hole is located on the front side of the support plate 10 and exposed to the outside, which facilitates connection with the foot support assembly.

[0052] In some embodiments, the front part of the base plate 3 is provided with a first mounting groove that runs through the base plate 3 in the vertical direction, and the inclined tube 2 is fitted into the first mounting groove and connected to the base plate 3.

[0053] At this time, the base plate 3 achieves the pre-positioning of the inclined tube 2 in the horizontal direction through the first mounting groove, which also increases the welding area between the base plate 3 and the inclined tube 2, thereby effectively improving the connection strength between the two and making the connection less prone to cracking.

[0054] For example, such as Figures 1-3 As shown, the first mounting groove extends to the front side of the base plate 3, that is, the front wall of the first mounting groove is open. At the same time, the outer contour of the cross-section of the first mounting groove matches the outer contour of the cross-section of the inclined tube 2 and is not circular. The base plate 3 is welded to the inclined tube 2.

[0055] In some embodiments, the frame further includes a reinforcing plate 110, which is disposed at the bottom of the first mounting groove and is located below the inclined tube 2 and connects the base plate 3 and the inclined tube 2.

[0056] The addition of the reinforcing plate 110 further improves the connection strength between the slant tube 2 and the base plate 3, making the slant tube 2 less prone to deformation or cracking relative to the base plate 3, resulting in higher reliability and service life of the frame.

[0057] For example, such as Figure 2 As shown, the left and right ends of the reinforcing plate 110 are welded to the inclined tube 2, the rear end of the reinforcing plate 110 is welded to the base plate 3, the front end of the reinforcing plate 110 is welded to the support plate 10, and the bottom surface of the reinforcing plate 110 is coplanar with the bottom surface of the base plate 3.

[0058] In some embodiments, the base plate 3 includes first ribs 32 and second ribs 33 spaced apart in the left-right direction. The two opposite sides of the first mounting groove are respectively formed on the first ribs 32 and second ribs 33 in the left-right direction. Each of the first ribs 32 and second ribs 33 forms a downward-opening first U-shaped groove 321. The frame also includes a left reinforcing plate 7 and a right reinforcing plate 8, which are connected to the first ribs 32 and second ribs 33 respectively and are respectively disposed within the two first U-shaped grooves 321.

[0059] By setting the first rib 32 and the second rib 33 as U-shaped plates that both enclose the first U-shaped groove 321, the weight and cost of the base plate 3 are effectively reduced. On this basis, the left reinforcing plate 7 and the right reinforcing plate 8 effectively improve the impact resistance of the first rib 32 and the second rib 33 in the left and right directions, and the first rib 32 and the second rib 33 are less likely to deform when subjected to impacts from the left and right directions.

[0060] For example, the first stiffener 32 and the second stiffener 33 are arranged in a mirror-symmetric manner, the left reinforcing plate 7 is welded to the first stiffener 32, and the right reinforcing plate 8 is welded to the second stiffener 33.

[0061] Optionally, such as Figure 2 and Figure 3 As shown, the left reinforcing plate 7 and the right reinforcing plate 8 are the same size and each includes a first plate 71 and a second plate 72 connected at an angle. The first plate 71 is located at the opening of the first U-shaped groove 321, and the second plate 72 extends to the bottom surface of the first U-shaped groove 321.

[0062] For example, both the left reinforcing plate 7 and the right reinforcing plate 8 are L-shaped plates perpendicular to the first plate 71 and the second plate 72. This further improves the outer strength of the frame, and when the first rib 32 and the second rib 33 are subjected to impacts from the left and right directions, they are not easily deformed or concave at any position in the up and down direction.

[0063] In some embodiments, the base plate 3 includes a plate body 31 and a third rib 34 and a fourth rib 35 disposed on the rear side of the plate body 31, with the third rib 34 and the fourth rib 35 arranged at intervals in the left-right direction. The rear fork 4 is located between the third rib 34 and the fourth rib 35 and includes a first fork body 41, a connecting plate 43, and a second fork body 42 connected sequentially in the left-right direction. The first fork body 41 is connected to the third rib 34, the second fork body 42 is connected to the fourth rib 35, and the connecting plate 43 is connected to the plate body 31. This effectively increases the welding area between the rear fork 4 and the base plate 3, resulting in a higher connection strength between the two.

[0064] For example, the rear fork 4 is made of lighter and stronger aluminum profile. The plate 31, the third rib 34, and the fourth rib 35 surround to form a rearward-facing U-shaped groove. The rear fork 4 is generally a U-shaped frame structure, and its entire body fits into the aforementioned U-shaped groove. The first fork body 41 is welded to the third rib 34, the second fork body 42 is welded to the fourth rib 35, and the connecting plate 43 is welded to the plate 31.

[0065] In some embodiments, the third rib 34 and the fourth rib 35 are provided with second U-shaped grooves 341 on their opposite sides, the first fork 41 is disposed in one of the second U-shaped grooves 341, and the second fork 42 is disposed in the other second U-shaped groove 341.

[0066] The setting of the second U-shaped groove 341 makes the weight and cost of the third rib 34 and the fourth rib 35 lower. The cooperation of the first fork body 41 and the second fork body 42 in the corresponding second U-shaped groove 341 further improves the connection strength between the rear fork 4 and the base plate 3.

[0067] For example, the connecting plate 43 is provided with threaded holes to provide mounting support for the rear mudguard, and the rear ends of the first fork 41 and the second fork 42 are both provided with slots to provide mounting support for the motor.

[0068] In some embodiments, the rear fork 4 further includes a first reinforcing rib 44 and a second reinforcing rib 45, the first reinforcing rib 44 connecting the connecting plate 43 and the first fork body 41, and the second reinforcing rib 45 connecting the connecting plate 43 and the second fork body 42.

[0069] The first reinforcing rib 44 and the second reinforcing rib 45 further improve the overall strength and rigidity of the rear fork 4. When subjected to frequent impacts from the rear wheel, the rear fork 4 is less likely to deform or even crack, and the electric vehicle with the frame of this embodiment has higher safety.

[0070] For example, such as Figure 3 and Figure 6 As shown, the first reinforcing rib 44 is welded to the rear side of the connecting plate 43 and the inner side of the first fork 41, and the second reinforcing rib 45 is welded to the rear side of the connecting plate 43 and the inner side of the second fork 42.

[0071] In some embodiments, both the third rib 34 and the fourth rib 35 are bent upward relative to the plate 31.

[0072] This setup provides a higher mounting point for the motor, resulting in a lower foot height across the entire frame. This lower foot height makes it easier to get on and off the scooter, and also effectively lowers the scooter's center of gravity, improving riding stability and safety.

[0073] In some embodiments, such as Figure 1 As shown, the top surface of the plate 31 is a plane perpendicular to the extension direction of the battery compartment 21.

[0074] Based on the inclined tube 2 being a profile extrusion extending vertically, the battery compartment 21 also extends vertically, with an opening at its upper end. This allows the battery compartment 21 to limit the battery's position in all directions except vertically, resulting in higher reliability of battery positioning. During electric vehicle operation, the battery is less likely to detach from the upper opening of the battery compartment 21. Furthermore, the top surface of the plate 31 is flat, enhancing user foot comfort.

[0075] For example, such as Figure 1 As shown, the height of the edge of the upper opening of the battery compartment 21 gradually decreases from front to back.

[0076] The electric vehicle according to the present invention includes a frame as described in any of the above embodiments.

[0077] The technical advantages of the electric vehicle according to the present utility model embodiment are the same as the technical advantages of the vehicle frame in the above embodiment, and will not be repeated here.

[0078] In some embodiments, the electric vehicle is a scooter.

[0079] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0080] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0081] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0082] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0083] In this utility model, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0084] Although the above embodiments have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Any changes, modifications, substitutions and variations made to the above embodiments by those skilled in the art are within the protection scope of the present invention.

Claims

1. A vehicle frame, characterized by, It includes a head tube (1), a slant tube (2), a base plate (3), and a rear fork (4) connected in sequence. The slant tube (2) is a profile extrusion extending in the vertical direction, and the slant tube (2) forms a battery compartment (21). It also includes a reinforcing plate that connects the head tube (1) and the inclined tube (2).

2. Frame according to claim 1, characterized in that The head tube (1) is a profile extrusion and includes a first side plate (12), a tube body (11) and a second side plate (13) connected sequentially in the left-right direction. The front side of the inclined tube (2) is provided with a first limiting groove (22) and a second limiting groove (23) arranged at intervals in the left-right direction. The rear end of the first side plate (12) is fitted in the first limiting groove (22) and connected to the inclined tube (2). The rear end of the second side plate (13) is fitted in the second limiting groove (23) and connected to the inclined tube (2).

3. Frame according to claim 2, characterized in that The tube body (11) and the inclined tube (2) are arranged at intervals in the front-back direction. The first side plate (12), the tube body (11), the second side plate (13) and the inclined tube (2) surround to form an installation cavity. The upper and lower surfaces of the installation cavity are open. The reinforcing plate includes an upper reinforcing plate (5) and a lower reinforcing plate (6). The upper reinforcing plate (5) is located at the open part of the upper surface of the mounting cavity and connects each of the tube body (11), the first side plate (12), the second side plate (13), and the inclined tube (2). The lower reinforcing plate (6) is located at the open part of the lower surface of the mounting cavity and connects each of the tube body (11), the first side plate (12), the second side plate (13), and the inclined tube (2).

4. The frame of claim 2, wherein, The frame also includes a battery lock fixing block (9), which is welded to the front side of the inclined tube (2).

5. The frame of claim 1, wherein, The frame also includes a tray (10), which is located at the bottom of the battery compartment (21) and connected to the inclined tube (2).

6. The frame of claim 5, wherein, The tray (10) is provided with a first mounting hole for mounting a battery connector seat and a second mounting hole for mounting a foot support assembly.

7. The frame of claim 1, wherein, The front part of the base plate (3) is provided with a first mounting groove that runs through the base plate (3) in the vertical direction, and the inclined tube (2) is fitted in the first mounting groove and connected to the base plate (3).

8. Frame according to claim 7, characterized in that The frame also includes a reinforcing plate (110), which is located at the bottom of the first mounting groove. The reinforcing plate (110) is located below the inclined tube (2) and connects the base plate (3) and the inclined tube (2).

9. The frame of claim 7, wherein, The base plate (3) includes a first rib (32) and a second rib (33) arranged at intervals along the left and right directions. The two opposite sides of the first mounting groove along the left and right directions are respectively formed on the first rib (32) and the second rib (33). Each of the first rib (32) and the second rib (33) forms a first U-shaped groove (321) with the opening facing downward. The frame also includes a left reinforcing plate (7) and a right reinforcing plate (8), which are connected to the first rib (32) and the second rib (33) respectively and are respectively disposed in the two first U-shaped grooves (321).

10. Frame according to claim 9, characterized in that The left reinforcing plate (7) and the right reinforcing plate (8) are the same size and each includes a first plate (71) and a second plate (72) connected at an angle. The first plate (71) is located at the opening of the first U-shaped groove (321), and the second plate (72) extends to the bottom surface of the first U-shaped groove (321).

11. Frame according to any of claims 1-10, characterized in that The base plate (3) includes a plate body (31) and a third rib (34) and a fourth rib (35) disposed on the rear side of the plate body (31), wherein the third rib (34) and the fourth rib (35) are arranged at intervals in the left-right direction; The rear fork (4) is located between the third rib (34) and the fourth rib (35) and includes a first fork body (41), a connecting plate (43), and a second fork body (42) connected sequentially in the left-right direction. The first fork body (41) is connected to the third rib (34), the second fork body (42) is connected to the fourth rib (35), and the connecting plate (43) is connected to the plate body (31).

12. The frame of claim 11, wherein, The third rib (34) and the fourth rib (35) are provided with second U-shaped grooves (341) on their opposite sides. The first fork (41) is disposed in one of the second U-shaped grooves (341), and the second fork (42) is disposed in the other second U-shaped groove (341).

13. The frame of claim 11, wherein, The rear fork (4) further includes a first reinforcing rib (44) and a second reinforcing rib (45), the first reinforcing rib (44) connecting the connecting plate (43) and the first fork body (41), and the second reinforcing rib (45) connecting the connecting plate (43) and the second fork body (42).

14. The frame of claim 11, wherein, Both the third rib (34) and the fourth rib (35) are bent upward relative to the plate (31).

15. The frame of claim 11, wherein, The top surface of the plate (31) is a plane perpendicular to the extension direction of the battery compartment (21).

16. An electric vehicle, characterized by Includes the frame as described in any one of claims 1-15.

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