Middle shaft structure of electric vehicle
The electric vehicle axle structure uses pivotable arms and tubular members with complementary connections to minimize welding, addressing inefficiencies in traditional manufacturing methods and reducing costs.
Patent Information
- Application Number
- CN202421848040.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-01
- Publication Date
- 2025-07-15
- Estimated Expiration
- 2034-08-01
AI Technical Summary
The existing electric vehicle central axle structure is mainly welding production, resulting in high production costs and insufficient welding reliability.
The support arm is rotatably connected to the central shaft. The support arm is provided with an extension along the front and/or rear sides of the central shaft. The frame is equipped with a connecting part on one side of the extension. It is fixed by fasteners and matches with square tubes and nuts to reduce welding applications.
It significantly reduces production costs and improves the reliability and stability of the central axis structure.
Smart Images
Figure CN223100925U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of vehicles, and particularly to a central shaft structure of an electric vehicle. Background Art
[0002] The electric vehicles referred to in this application mainly refer to two-wheeled electric bicycles, electric motorcycles, etc. Such electric vehicles include a central shaft, and the central shaft is rotatably installed on the vehicle frame through a central shaft structure to form the required functions. Therefore, the central shaft is the core structure connecting the two sides of the pedals. When the battery runs out of power, by stepping on the pedals, the central shaft rotates. The central shaft is connected with a sprocket, and the sprocket drives the driven gear on the wheel through a chain, thereby driving the electric bicycle to ride. Of course, when there is power, one can also step on the pedals to ride, making it easier for the user to ride.
[0003] Currently, the production of the central shaft structure mainly relies on welding. Therefore, the applicant has studied a new central shaft structure of an electric vehicle, which is beneficial to reducing welding. Summary of the Utility Model
[0004] The technical problem to be solved by the utility model is to overcome the defects of the prior art and propose a central shaft structure of an electric vehicle, which is beneficial to reducing welding.
[0005] Compared with the prior art, the utility model proposes a central shaft structure of an electric vehicle, which includes a central shaft and a vehicle frame, and further includes at least two support arms. The support arms are rotatably connected to the central shaft to rotatably support the central shaft. The support arms are provided with extension parts along the front side and / or the rear side of the central shaft. The vehicle frame is provided with a connection part on one side of the extension part. The extension part and the connection part are in concave-convex fit and limited, and are fixed with fasteners.
[0006] As an improvement, the vehicle frame is provided with a connection part between the two support arms. The support arms are both provided with grooves facing the side surfaces of the connection part. The grooves and the corresponding side surfaces of the connection part are in concave-convex fit and limited. The fasteners sequentially pass through the support arms and the side surfaces of the connection part to fix the support arms and the side surfaces of the connection part.
[0007] As an improvement, the connection part adopts a square tube. A nut is arranged inside the square tube. The fasteners sequentially pass through the support arms and the side surfaces of the connection part and are connected with the nut, thereby fixing the support arms and the side surfaces of the connection part.
[0008] As an improvement, the nut adopts a square nut adapted to the inner circumference of the square tube.
[0009] As an improvement, the extension part is further provided with a limiting hook part. The side surface of the connection part is provided with an insertion hole matched with the limiting hook part. The hook part is connected with the insertion hole to limit the movement of the support arm.
[0010] As an improvement, the support arm is provided with an axial through hole, and the central shaft is rotatably sleeved with the axial through hole.
[0011] As an improvement, a bushing or a bearing is provided in the axial through hole.
[0012] As an improvement, a bushing is provided between two opposite axial through holes, and the bushing rotatably supports the central shaft.
[0013] After adopting the above structure, compared with the prior art, the utility model has the following advantages:
[0014] This disclosure changes the idea. By providing at least two support arms, the support arms are rotatably connected to the central shaft to rotatably support the central shaft. The support arms are provided with extension parts along the front side and / or the rear side of the central shaft. The vehicle frame is provided with a connecting part on one side of the extension part. The extension part and the connecting part are in concave-convex fit and limited, and are fixed with fasteners, thereby significantly reducing the application of welding. Description of the Drawings
[0015] Figure 1 It is a three-dimensional schematic diagram of the central shaft structure of an electric vehicle.
[0016] Figure 2 It is a three-dimensional schematic diagram of the central shaft structure of an electric vehicle after installing a bushing.
[0017] Figure 3 It is a three-dimensional schematic diagram of the front view angle of the central shaft structure of an electric vehicle.
[0018] Figure 4 It is a three-dimensional schematic diagram mainly showing the connection relationship between the support arm and the connecting part.
[0019] Figure 5 It is a three-dimensional schematic diagram mainly showing the support arm.
[0020] Figure 6 It is a three-dimensional schematic diagram mainly showing the insertion hole.
[0021] As shown in the figure, 1. Central shaft, 2. Vehicle frame, 3. Support arm, 4. Extension part, 5. Connecting part, 6. Groove, 7. Fastener, 8. Lock washer, 9. Hook part, 10. Insertion hole, 11. Axial through hole, 12. Bushing, 13. Pedal, 14. Sprocket, 15. Nut. Detailed Description of the Invention
[0022] The following description is used to disclose the utility model so that those skilled in the art can implement the utility model. The following embodiments are only examples, and those skilled in the art can think of other obvious variations. The basic principles defined in the following description can be applied to other implementation schemes, variation schemes, improvement schemes, equivalent schemes, and other technical schemes that do not deviate from the spirit and scope of the utility model.
[0023] The following further details the utility model:
[0024] As shown Figures 1 to 6 in the figure, a central shaft structure of an electric vehicle is shown, which includes a central shaft 1 and a vehicle frame 2, and also includes at least two support arms 3. The support arms 3 are rotatably connected to the central shaft 1 to rotatably support the central shaft 1. The support arms 3 are provided with extension parts 4 along the front side and / or the rear side of the central shaft 1. The vehicle frame 2 is provided with a connecting part 5 on one side of the extension part 4. The extension part 4 and the connecting part 5 are in concave-convex fit and limited, and are fixed with a fastener 7.
[0025] As shown Figure 1 in the figure, two support arms 3 are provided, with the front side in the direction of the vehicle head and the rear side in the direction of the vehicle tail. The support arms 3 are provided with extension parts 4 along the rear side of the central shaft 1, and the connecting part 5 is also arranged on the rear side of the central shaft 1. The central shaft 1 is used to connect the pedal 13 and the sprocket 14.
[0026] In some embodiments, as shown Figure 1 in the figure, the vehicle frame 2 is provided with a connecting part 5 between the two support arms 3. The support arms 3 are both provided with grooves 6 arranged on the side faces facing the connecting part 5. The grooves 6 and the corresponding side faces of the connecting part 5 are in concave-convex fit and limited. The fastener 7 sequentially passes through the support arm 3 and the side face of the connecting part 5 to fix the support arm 3 and the side face of the connecting part 5. A lock washer 8 can be further provided to prevent loosening. The groove 6 is a U-shaped groove arranged on the side face facing the connecting part 5.
[0027] In some embodiments, as shown Figure 1 in the figure, the connecting part 5 is made of square tube material. A nut 15 is arranged inside the square tube material. The fastener 7 sequentially passes through the support arm 3 and the side face of the connecting part 5 and is connected to the nut 15, thereby fixing the support arm 3 and the side face of the connecting part 5. Using square tube material, that is, profile, can significantly reduce the production and manufacturing cost. Moreover, the square shape of the square tube material is beneficial for concave-convex fit and limitation, and has high strength.
[0028] In some embodiments, as shown Figure 3 , 5 in the figure, the nut 15 is a square nut 15 adapted to the inner circumference of the square tube material, thereby restricting the free rotation of the square nut 15.
[0029] In some embodiments, as shown Figure 5 , 6 in the figure, the extension part 4 is further provided with a limiting hook part 9, and the side face of the connecting part 5 is provided with an insertion hole 10 cooperating with the limiting hook part 9. The hook part 9 and the insertion hole 10 are connected to limit the movement of the support arm 3. In this way, it is beneficial to improve the reliability of the limitation.
[0030] In some embodiments, as shown Figure 4 in the figure, the support arm 3 is provided with an axial through hole 11, and the central shaft 1 is rotatably sleeved with the axial through hole 11.
[0031] For better rotational support, a bushing 12 or a bearing is arranged in the axial through hole 11.
[0032] In some embodiments, as Figure 2 shown, a bushing 12 is disposed between two opposite axial through holes 11. The bushing 12 rotatably supports the central shaft 1. Additionally, the bushing 12 also serves to connect the two axial through holes 11, such that the two support arms 3, the bushing 12, and the connecting portion 5 form a complete frame structure, thereby having better structural stability.
[0033] The above are only illustrative embodiments of the present invention. Therefore, any equivalent changes or modifications made to the structure, features, and principles described within the scope of the patent protection of the present invention are included within the scope of the patent protection of the present invention.
Claims
1. The central shaft structure of an electric vehicle, comprising a central shaft (1) and a vehicle frame (2), is characterized in that, It further includes at least two support arms (3), the support arms (3) are rotatably connected to the central axis (1) to rotatably support the central axis (1), the support arms (3) are provided with extension parts (4) along the front side and / or the rear side of the central axis (1), the frame (2) is provided with a connection part (5) on one side of the extension part (4), and the extension part (4) and the connection part (5) are in concave-convex fit and limited, and are fixed by fasteners (7).
2. The central axis structure of the electric vehicle according to claim 1, characterized in that, The frame (2) is provided with a connection part (5) between the two support arms (3), the support arms (3) are both provided with grooves (6) arranged on the side faces facing the connection part (5), the grooves (6) and the corresponding side faces of the connection part (5) are in concave-convex fit and limited, and the fasteners (7) sequentially pass through the support arms (3) and the side faces of the connection part (5) to fix the support arms (3) and the side faces of the connection part (5).
3. The central axis structure of the electric vehicle according to claim 2, characterized in that, The connection part (5) is made of square tube material, a nut (15) is arranged inside the square tube material, the fasteners (7) sequentially pass through the support arms (3) and the side faces of the connection part (5) and are connected to the nut (15), so as to fix the support arms (3) and the side faces of the connection part (5).
4. The central axis structure of the electric vehicle according to claim 3, characterized in that, The nut (15) is a square nut (15) adapted to the inner circumference of the square tube material.
5. The central axis structure of the electric vehicle according to claim 2, characterized in that, The extension part (4) is further provided with a limiting hook part (9), the side face of the connection part (5) is provided with an insertion hole (10) matching with the limiting hook part (9), and the hook part (9) is connected to the insertion hole (10) to limit the movement of the support arm (3).
6. The central axis structure of the electric vehicle according to claim 1 or 2, characterized in that, The support arm (3) is provided with an axial through hole (11), and the central axis (1) is rotatably sleeved with the axial through hole (11).
7. The central axis structure of the electric vehicle according to claim 6, characterized in that, The axial through hole (11) is provided with a bushing (12) or a bearing.
8. The central axis structure of the electric vehicle according to claim 7, wherein, A bushing (12) is arranged between two opposite axial through holes (11), and the bushing (12) rotatably supports the central axis (1).