Electric Vehicles

Abstract

The electric vehicle of the present invention comprises a first frame and a second frame, the first frame is rotatably connected to the second frame, and the rotation axis of the first frame and the second frame is coaxial with the axis of the sprocket shaft. The rotation axis of the first frame and the second frame is coaxial with the axis of the sprocket shaft, and this solution simplifies the structure of the electric vehicle. When the first frame and the second frame have folding capabilities, there is no need to set up a folder independently, thereby simplifying the structure of the electric vehicle. In addition, this solution enables the sprocket shaft, the first frame, and the second frame to be evenly stressed when the sprocket shaft is driven to rotate by manpower, greatly improving the stability of the electric vehicle.

Description

Technical Field

[0001] The invention relates to a vehicle, in particular to an electric vehicle, and belongs to the field of electric bicycles. Background Art

[0002] An electric vehicle is a means of transportation driven by electricity, such as electric cars, electric automatic cars, rail electric vehicles, etc. Taking electric bicycles as an example, electric bicycles are widely used because they have a smaller size and easier driving experience than motorcycles.

[0003] The rapid popularity of electric bicycles has led to rapid development of electric bicycle technology. For example, the performance of electric bicycles is getting better and better, and the battery life is getting longer and longer. Small-sized, foldable electric bicycles are particularly popular. For small-sized electric bicycles, due to their small size, the batteries used in electric bicycles must have a small size, which limits the battery life of electric bicycles.

[0004] In the prior art, in order to provide an electric bicycle with a better driving experience, a human-driven pedal assembly is generally installed on the electric bicycle. The pedal assembly uses a sprocket and a chain to drive the electric bicycle to move, so that the electric bicycle can still move under conditions of battery failure or insufficient power.

[0005] For electric bicycles with folding capabilities or the ability to adjust their shape, the pedal assembly installed on such electric bicycles in the prior art has an unreasonable structural design. When the pedal assembly is driven manually, the frame is subjected to corresponding forces, resulting in poor stability of the electric bicycle, which in turn affects the driving experience of the electric bicycle. Summary of the invention

[0006] The technical problem to be solved by the present invention is to provide an electric vehicle with reasonable structural design and good stability.

[0007] The technical solution adopted by the present invention to solve the above technical problems is:

[0008] The electric vehicle comprises a sprocket shaft, and also comprises a first frame and a second frame, wherein the first frame is rotatably connected with the second frame, and the rotation axis of the first frame relative to the second frame is coaxial with the axis of the sprocket shaft.

[0009] The electric vehicle of the present invention comprises a first frame and a second frame, the first frame is rotatably connected to the second frame, and the rotation axis of the first frame and the second frame is coaxial with the axis of the sprocket shaft. The rotation axis of the first frame and the second frame is coaxial with the axis of the sprocket shaft, and this solution simplifies the structure of the electric vehicle. When the first frame and the second frame have folding capabilities, there is no need to set up a folder independently, thereby simplifying the structure of the electric vehicle. In addition, this solution enables the sprocket shaft, the first frame, and the second frame to be evenly stressed when the sprocket shaft is driven to rotate by manpower, greatly improving the stability of the electric vehicle.

[0010] Preferably, the first frame includes a connecting portion connected to the second frame, an installation space matched with the connecting portion is formed on the second frame, and at least a part of the connecting portion is located in the installation space;

[0011] Alternatively, an installation space is formed on the first frame, and the second frame includes a connecting portion that matches the installation space, and at least a portion of the connecting portion is located in the installation space.

[0012] The setting of the connecting part and the installation space is mainly used to improve the rotation accuracy of the first frame relative to the second frame, that is, the first frame and the second frame only rotate around the rotation axis under the limitation of the connecting part and the installation space, and will not jump, thereby optimizing the performance of the electric vehicle and extending the service life of the electric vehicle.

[0013] Preferably, the installation space includes an assembly body forming the installation space, and the assembly body and the connecting portion are both provided with an axial hole that cooperates with the sprocket shaft.

[0014] The arrangement of the assembly simplifies the structure of the first frame or the second frame, thereby reducing the manufacturing cost of the electric vehicle.

[0015] Preferably, rolling bearings are provided between the sprocket shaft and the connecting portion, and between the sprocket shaft and the assembly.

[0016] The rolling bearing is mainly used to reduce the friction between the sprocket shaft and the first frame and the second frame, reduce the wear of the sprocket shaft, the first frame and the second frame, and extend the service life of the electric vehicle.

[0017] In addition, the provision of the rolling bearing further improves the stability of the electric vehicle, and the first frame and the second frame only rotate relative to each other around the rotation axis without jumping.

[0018] Preferably, a bearing cover for positioning the rolling bearing is further provided on the assembly, the bearing cover is fixed to the assembly by threads, and a positioning member for positioning the bearing cover is provided between the bearing cover and the assembly.

[0019] The bearing cover is mainly used to protect and position the rolling bearing, thereby extending the service life of the rolling bearing and improving the stability of the electric vehicle.

[0020] Preferably, the positioning member is an elastic gasket, or the positioning member is a spring clip.

[0021] There are multiple alternatives for positioning parts, and the electric vehicle is easy to maintain.

[0022] Preferably, an interference block is provided between the first frame and the second frame for limiting a rotation angle of the first frame relative to the second frame.

[0023] The abutment block is mainly used to limit the rotation angle of the first frame and the second frame to optimize the performance of the electric vehicle.

[0024] Preferably, the abutment block is an elastic block with elastic deformation capability.

[0025] Alternatively, the resistance block is a spring,

[0026] There are multiple options for conflict, and electric vehicles are easy to maintain.

[0027] Alternatively, the resistance block includes an outer cylinder fixed to the first frame and an inner cylinder arranged in the outer cylinder and in resistance to the second frame, an elastic member is arranged between the outer cylinder and the inner cylinder to push the inner cylinder away from the outer cylinder, a guide groove is arranged in the outer cylinder to guide the inner cylinder, a guide block matching the guide groove is arranged on the inner cylinder, and an end cover is also arranged on the outer cylinder to close the guide groove to prevent the inner cylinder from separating from the outer cylinder. The outer cylinder is fixed to the first frame through a connecting plate, an external thread is arranged on the outer wall of the outer cylinder, a screw hole matching the external thread is also arranged on the connecting plate, a locking nut for locking the outer cylinder to the connecting plate is also arranged on the outer cylinder, a rubber pad is arranged on the inner cylinder, the rubber pad is located between the inner cylinder and the second frame, and a rib is arranged between the connecting plate and the first frame.

[0028] The position of the resistance block relative to the second frame can be adjusted, so that the rotation angle of the first frame relative to the second frame can be adjusted, thereby making the electric vehicle have a better driving experience. The driver can adjust the rotation angle of the first frame relative to the second frame according to his height and riding posture, thereby optimizing the performance of the electric vehicle.

[0029] Preferably, the electric vehicle further comprises a seat, wherein the seat is fixed on the first frame, and the seat is projected onto the second frame, and the abutment block is located between the sprocket shaft and the projection of the seat on the second frame.

[0030] This solution enables the driver's center of gravity to be in a reasonable position when riding, and the electric vehicle is not easy to overturn or change shape, thereby optimizing the performance of the electric vehicle.

[0031] Preferably, the electric vehicle further comprises a pedal assembly driven by manpower to rotate the sprocket shaft, the pedal assembly is fixed on the sprocket shaft, a fixing portion for fixing the pedal assembly is also provided on the sprocket shaft, and the cross-section of the fixing portion is a polygon.

[0032] The fixing part and the pedal assembly are easy to assemble and the power transmission is reliable, thereby optimizing the performance of the electric vehicle.

[0033] Compared with the prior art, the present invention has the following advantages and effects:

[0034] 1. The rotation axis of the first frame relative to the second frame is coaxial with the axis of the sprocket shaft, which simplifies the structure of the electric vehicle and reduces the manufacturing cost of the electric vehicle.

[0035] 2. The rotation axes of the first frame and the second frame are coaxial with the axis of the sprocket shaft. When the sprocket shaft rotates, the first frame, the second frame and the sprocket shaft are evenly stressed, thereby improving the stability of the electric vehicle and extending the service life of the electric vehicle.

[0036] 3. The arrangement of the outer cylinder and the inner cylinder allows the position of the abutment block relative to the second frame to be adjusted, thereby optimizing the performance of the electric vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0038] Figure 1 It is a structural schematic diagram of the present invention.

[0039] Figure 2 It is a schematic diagram of the connection between the first frame and the second frame.

[0040] Figure 3 It is a schematic diagram of the connection between the resistance block and the first frame.

[0041] Figure 4 for Figure 3 Cross-sectional view of the middle interference block.

[0042] Description of labels:

[0043] 1. sprocket shaft, 2. first frame, 3. second frame, 4. connecting part, 5. installation space, 6. assembly, 7. rolling bearing, 8. bearing cover, 9. positioning member, 10. resistance block, 11. outer cylinder, 12. inner cylinder, 13. elastic member, 14. guide groove, 15. guide block, 16. end cover, 17. connecting plate, 18. locking screw, 19. rubber pad, 20. rib plate, 21. seat, 22. pedal assembly, 23. fixing part. DETAILED DESCRIPTION

[0044] The present invention is further described in detail below in conjunction with embodiments. The following embodiments are for explanation of the present invention but the present invention is not limited to the following embodiments.

[0045] Example 1

[0046] like Figure 1 , Figure 2 As shown, an electric vehicle, which refers to an electric bicycle, includes a sprocket shaft 1. The electric vehicle also includes a first frame 2 and a second frame 3. The first frame 2 is rotatably connected to the second frame 3. The rotation axis of the first frame 2 relative to the second frame 3 is coaxial with the axis of the sprocket shaft 1.

[0047] like Figure 1 , Figure 2 As shown, the sprocket shaft 1 refers to the shaft that rotates synchronously with the sprocket. Electric vehicles generally have a human driver, which includes a sprocket assembly and a sprocket shaft 1. The wheel assembly drives the electric vehicle to move. The specific structure of the sprocket assembly can refer to the structure of a bicycle in the prior art, and will not be repeated here.

[0048] Taking a foldable electric vehicle as an example, the foldable electric vehicle generally comprises a first frame 2 and a second frame 3, and the first frame 2 rotates relative to the second frame 3, thereby forming the foldable electric vehicle. However, the sprocket shaft 1 of the electric vehicle in the prior art is not arranged in a reasonable position.

[0049] Assume that the first frame 2 and the second frame 3 are connected by a shaft, and there is a certain distance between the sprocket shaft 1 and the shaft. When the sprocket shaft 1 is driven to rotate by human power, the force applied by human power is not stable and the force direction may change. At this time, the distance between the sprocket shaft 1 and the shaft will form a force arm for human power, and the force arm will cause the shaft and the sprocket shaft 1 to bear a shear force. For an electric vehicle with folding ability, the shear force will cause the electric vehicle to be unstable, the folding mechanism to operate unexpectedly, etc. In addition, the shear force will also shorten the service life of the electric vehicle.

[0050] The axis of the sprocket shaft 1 is made coaxial with the rotation axis of the first frame 2 relative to the second frame 3. This solution can effectively avoid the formation of shear force or shorten the length of the lever arm, thereby making the electric vehicle more stable and extending the service life of the electric vehicle.

[0051] The limiting of the rotation angle between the first frame 2 and the second frame 3 is referred to the prior art and will not be elaborated here. The present embodiment aims to provide a stable electric vehicle and does not involve the limiting of the first frame 2 relative to the second frame 3. The limiting method of the first frame 2 and the second frame 3 belongs to the prior art and those skilled in the art may refer to the prior art for setting.

[0052] The first frame 2 and the second frame 3 can be made of magnesium-aluminum alloy, or the first frame 2 and the second frame 3 can be made of plastic. Since plastic or magnesium-aluminum alloy are both light in weight, using plastic or magnesium-aluminum alloy to make the first frame and the second frame greatly reduces the weight of the electric vehicle and reduces the manufacturing cost of the electric vehicle.

[0053] Example 2

[0054] This embodiment introduces a possible assembly solution of the first frame 2 and the second frame 3 .

[0055] like Figure 3 As shown, the first frame 2 includes a connecting portion 4 connected to the second frame 3, and an installation space 5 matched with the connecting portion 4 is formed on the second frame 3, and at least a part of the connecting portion 4 is located in the installation space 5;

[0056] Alternatively, an installation space 5 is formed on the first frame 2 , and the second frame 3 includes a connecting portion 4 that cooperates with the installation space 5 , and at least a portion of the connecting portion 4 is located in the installation space 5 .

[0057] The connecting portion 4 and the first frame 2 or the second frame 3 are an integrated structure.

[0058] The specific locations of the connection portion 4 and the installation space 5 are not limited and can be freely selected by those skilled in the art. The specific locations of the connection portion 4 and the installation space 5 will not affect the performance of the electric vehicle.

[0059] In a possible implementation, the installation space 5 includes an assembly body 6 forming the installation space 5 , and both the assembly body 6 and the connecting portion 4 are provided with an axial hole that cooperates with the sprocket shaft 1 .

[0060] Taking the installation space 5 being arranged on the second frame 3 as an example, the assembly body 6 and the second frame 3 are an integrated structure, and the installation space 5 is mainly used to limit the position of the connecting portion 4 to prevent the connecting portion 4 from jumping relative to the installation space 5.

[0061] In a possible implementation, rolling bearings 7 are provided between the sprocket shaft 1 and the connecting portion 4 , and between the sprocket shaft 1 and the assembly 6 .

[0062] The assembly body 6 is also provided with a bearing cover 8 for positioning the rolling bearing 7 . The bearing cover 8 is fixed to the assembly body 6 by threads, and a positioning member 9 for positioning the bearing cover 8 is provided between the bearing cover 8 and the assembly body 6 .

[0063] To further simplify the structure of the electric vehicle, the inner ring of the rolling bearing 7 located on the assembly 6 can be the sprocket shaft 1, and the outer ring can be the assembly 6. This solution makes the electric vehicle easy to assemble and has a simple structure. Since there is no need to set an outer ring and an inner ring, the manufacturing cost of the electric vehicle is reduced.

[0064] The positioning member 9 is an elastic gasket, or the positioning member 9 is a spring clip.

[0065] The positioning member 9 mainly plays the role of preventing loosening, and its specific structure is not limited.

[0066] Example 3

[0067] This embodiment introduces a possible solution for limiting the rotation angle of the first frame 2 relative to the second frame 3 .

[0068] An abutment block 10 is further disposed between the first frame 2 and the second frame 3 to limit the rotation angle of the first frame 2 relative to the second frame 3 .

[0069] In a possible solution, the abutment block 10 is an elastic block with elastic deformation capability, and the elastic block is fixed on the first frame 2 , or the elastic block is fixed on the second frame 3 .

[0070] In a possible solution, the resistance block 10 is a spring, and the spring is fixed on the first frame 2 , or the spring is fixed on the second frame 3 .

[0071] like Figure 3 , Figure 4 As shown, a possible solution is that the abutment block 10 includes an outer cylinder 11 fixed on the first frame 2 and an inner cylinder 12 arranged in the outer cylinder 11 and abutting against the second frame 3, and an elastic member 13 is arranged between the outer cylinder 11 and the inner cylinder 12 to push the inner cylinder 12 away from the outer cylinder 11, and the elastic member 13 can be a spring.

[0072] A guide groove 14 for guiding the inner cylinder 12 is arranged in the outer cylinder 11 , and a guide block 15 cooperating with the guide groove 14 is arranged on the inner cylinder 12 . The guide block 15 and the inner cylinder 12 are an integrated structure.

[0073] The outer cylinder 11 is also provided with an end cover 16 for closing the guide groove 14 to prevent the inner cylinder 12 from being separated from the outer cylinder 11 . The end cover 16 can be fixed to the outer cylinder 11 by threads.

[0074] The outer cylinder 11 is fixed to the first frame 2 through a connecting plate 17. An external thread is arranged on the outer wall of the outer cylinder 11. A screw hole matching the external thread is also arranged on the connecting plate 17. A locking nut 18 for locking the outer cylinder 11 on the connecting plate 17 is also arranged on the outer cylinder 11. The locking nut 18 and the connecting plate 17 lock the outer cylinder 11 by the principle of double nut abutment.

[0075] A rubber pad 19 is provided on the inner tube 12 . The rubber pad 19 is located between the inner tube 12 and the second frame 3 . The rubber pad 19 can be bonded to the inner tube 12 .

[0076] A rib plate 20 is disposed between the connecting plate 17 and the first frame body 2 . The connecting plate 17 and the first frame body 2 may be an integrated structure, and the rib plate 20 may be welded between the first frame body 2 and the connecting plate 17 .

[0077] Example 4

[0078] This embodiment introduces a possible optimization solution in combination with Embodiment 3.

[0079] like Figure 1 As shown, the electric vehicle further includes a seat 21 , which is fixed on the first frame 2 , and the seat 21 is projected onto the second frame 3 , and the abutment block 10 is located between the sprocket shaft 1 and the projection of the seat 21 on the second frame 3 .

[0080] This solution makes the position of the seat body relative to the first frame body 2 and the second frame body 3 reasonable. When the driver drives the electric vehicle, the center of gravity of the electric vehicle is reasonably located, thereby improving the stability of the electric vehicle.

[0081] Example 5

[0082] This embodiment can be combined with any of the above embodiments to introduce a possible optimization solution.

[0083] like Figure 1 As shown, the electric vehicle also includes a pedal assembly 22 driven by manpower to rotate the sprocket shaft 1, the pedal assembly 22 is fixed on the sprocket shaft 1, and a fixing portion 23 for fixing the pedal assembly 22 is also provided on the sprocket shaft 1, and the cross-section of the fixing portion 23 is a polygon.

[0084] The sprocket shaft 1 and the fixing portion 23 are an integrated structure, and the specific structure of the pedal assembly 22 is not limited thereto, and those skilled in the art may refer to the prior art.

[0085] The term "include" in this specification means that the electric vehicle may include other features in addition to the above-mentioned disclosed technical features, such as necessary batteries, handlebars, controllers and other features.

[0086] In addition, it should be noted that the shapes and names of the parts and components of the specific embodiments described in this specification may be different. Any equivalent or simple changes made based on the structure, features and principles described in the patent concept of the present invention are included in the protection scope of the patent of the present invention. The technicians in the technical field of the present invention can make various modifications or supplements to the specific embodiments described or replace them in a similar manner, as long as they do not deviate from the structure of the present invention or exceed the scope defined by the claims, they should all fall within the protection scope of the present invention.

Claims

1. An electric vehicle, comprising a sprocket shaft (1), characterized in that: The electric vehicle further comprises a first frame (2) and a second frame (3), wherein the first frame (2) is rotatably connected to the second frame (3), and a rotation axis of the first frame (2) relative to the second frame (3) is coaxial with an axis of the sprocket shaft (1); A resistance block (10) is also provided between the first frame (2) and the second frame (3) for limiting the rotation angle of the first frame (2) relative to the second frame (3); the resistance block (10) comprises an outer cylinder (11) fixed to the first frame (2) and an inner cylinder (12) arranged in the outer cylinder (11) and in contact with the second frame (3); an elastic member (13) is provided between the outer cylinder (11) and the inner cylinder (12) for pushing the inner cylinder (12) away from the outer cylinder (11); a guide groove (14) is provided in the outer cylinder (11) for guiding the inner cylinder (12); a guide block (15) cooperating with the guide groove (14) is provided on the inner cylinder (12); and a spring (15) is provided on the outer cylinder (11) for guiding the inner cylinder (12). ) is also provided with an end cover (16) for closing the guide groove (14) to prevent the inner tube (12) from being separated from the outer tube (11); the outer tube (11) is fixed to the first frame (2) through a connecting plate (17); an external thread is provided on the outer wall of the outer tube (11); a screw hole matching the external thread is also provided on the connecting plate (17); a locking nut (18) for locking the outer tube (11) on the connecting plate (17); a rubber pad (19) is provided on the inner tube (12); the rubber pad (19) is located between the inner tube (12) and the second frame (3); a rib plate (20) is provided between the connecting plate (17) and the first frame (2); The electric vehicle further comprises a seat (21), the seat (21) being fixed on the first frame (2), and the seat (21) being projected onto the second frame (3), the abutment block (10) being located between the sprocket shaft (1) and the projection of the seat (21) on the second frame (3).

2. An electric vehicle according to claim 1, characterized in that: The first frame (2) comprises a connecting portion (4) connected to the second frame (3), an installation space (5) matching with the connecting portion (4) is formed on the second frame (3), and at least a part of the connecting portion (4) is located in the installation space (5); Alternatively, an installation space (5) is formed on the first frame (2), the second frame (3) comprises a connecting portion (4) that cooperates with the installation space (5), and at least a portion of the connecting portion (4) is located in the installation space (5).

3. An electric vehicle according to claim 2, characterized in that: The installation space (5) comprises an assembly (6) forming the installation space (5), and both the assembly (6) and the connecting portion (4) are provided with an axial hole that cooperates with the sprocket shaft (1).

4. An electric vehicle according to claim 3, characterized in that: Rolling bearings (7) are provided between the sprocket shaft (1) and the connecting portion (4), and between the sprocket shaft (1) and the assembly (6).

5. An electric vehicle according to claim 4, characterized in that: A bearing cover (8) for positioning the rolling bearing (7) is also provided on the assembly (6); the bearing cover (8) is fixed to the assembly (6) by means of threads, and a positioning member (9) for positioning the bearing cover (8) is provided between the bearing cover (8) and the assembly (6).

6. An electric vehicle according to claim 5, characterized in that: The positioning member (9) is an elastic gasket, or the positioning member (9) is a spring clip.

7. An electric vehicle according to claim 1, characterized in that: The electric vehicle further comprises a pedal assembly (22) driven by human power to rotate the sprocket shaft (1); the pedal assembly (22) is fixed to the sprocket shaft (1); a fixing portion (23) for fixing the pedal assembly (22) is also provided on the sprocket shaft (1); and the cross section of the fixing portion (23) is polygonal.

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