Middle motor assembly combined with frame

Abstract

The utility model discloses a mid-motor assembly combined with a frame. The mid-motor assembly comprises a motor barrel, a first side cover, a second side cover, a top cover, a rotor shaft, a vehicle transmission wheel, a second bearing, a first bearing, a permanent magnet synchronous motor and a permanent magnet synchronous motor driver. According to the mid-motor assembly, the motor, the motor driver and the transmission mechanism are integrated and integrally connected with the frame, extra mounting space does not need to be prepared on the frame, firm and reliable connection between the motor and the frame can be ensured, the structural stability and safety of the whole electric vehicle are improved, and the cost is reduced. And the problem of connection looseness or fracture possibly existing in the traditional design is avoided. In addition, due to the close combination of the middle motor assembly and the frame, the use of extra connecting pieces can be reduced, the waste of materials is reduced, the manufacturing cost is reduced, and meanwhile, the light weight effect of the whole vehicle is improved. In addition, the motor and the motor driver are integrated together, so that a vehicle body circuit can be simplified.

Description

Technical Field

[0001] The utility model relates to the technical field of electric bicycles, in particular to a mid-mounted motor assembly combined with a frame of an electric bicycle. Background Art

[0002] As an environmentally friendly and convenient means of transportation, electric bicycles have attracted widespread attention and application in recent years. One of their core technologies is how to effectively integrate the motor with the frame to achieve efficient and stable power transmission while also ensuring lightweight and stable overall structure.

[0003] In traditional electric bicycle designs, the motor is typically mounted in the middle or front of the frame, requiring additional space on the frame for the motor. The motor is typically connected directly to the frame via traditional welding or bolting. Bolting is often not strong enough and cannot effectively maintain a tight connection between the motor and the frame, making it prone to loosening or breaking during use, affecting the stability and safety of the vehicle. The welding process can easily cause the frame to deform, also affecting the stability and safety of the vehicle. Furthermore, a loose connection between the motor and the frame can lead to problems such as low transmission efficiency and poor installation accuracy. Utility Model Content

[0004] In view of the deficiencies in the prior art, the present invention aims to provide a mid-mounted motor assembly combined with a vehicle frame.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A mid-mounted motor assembly combined with a vehicle frame, comprising a motor barrel, a first side cover, a second side cover, a top cover, a rotor shaft, a vehicle transmission wheel, a second bearing, a first bearing, a permanent magnet synchronous motor, and a permanent magnet synchronous motor driver;

[0007] The side cover 1 and the side cover 2 are respectively fixed on both sides of the motor barrel, and the top cover is fixed on the top surface of the motor barrel. There is a space inside the motor barrel, and the rotor shaft, bearing 2, bearing 1, permanent magnet synchronous motor and permanent magnet synchronous motor driver are all arranged inside the motor barrel; the rotor shaft is connected to the rotor of the permanent magnet synchronous motor as the output shaft of the permanent magnet synchronous motor, and its two ends pass through the two ends of the permanent magnet synchronous motor and are respectively connected to bearing 1 and bearing 2; the permanent magnet synchronous motor is connected to the permanent magnet synchronous motor driver; bearing 1 and bearing 2 are respectively fixed to the side cover 1 and the side cover 2; one end of the rotor shaft passes through the outside of the side cover 2 and is coaxially fixedly connected to the vehicle transmission wheel;

[0008] The upper part of the side cover 1 is provided with several threaded holes 1 for connecting to the frame of the electric vehicle, and the lower part is provided with several threaded holes 2 for connecting to the rear fork structure of the electric vehicle; the upper part of the side cover 2 is provided with several threaded holes 3 for connecting to the frame adapter plate of the electric vehicle, and the frame adapter plate is connected to the main frame of the electric vehicle.

[0009] Furthermore, the top cover is provided with a motor wire threading hole, and a motor wire threading hole plug is sealed in the motor wire threading hole, and the motor wire threading hole plug can allow the line to pass through.

[0010] Furthermore, a battery-powered plug is provided on the top cover.

[0011] Furthermore, a bearing groove is provided on the inner side surface of the side cover 1 for placing the bearing 1.

[0012] Furthermore, a bearing hole is provided on the side cover 2 for placing the second bearing.

[0013] Furthermore, a plurality of expanded threaded holes are reserved at the lower portion of the side cover 2.

[0014] The beneficial effects of the present invention are:

[0015] 1. The mid-mounted motor assembly of this utility model integrates the motor, motor driver, and transmission mechanism into a single unit, which is then connected to the vehicle frame. This eliminates the need for additional mounting space on the frame and ensures a secure and reliable connection between the motor and frame, improving the structural stability and safety of the electric vehicle and avoiding the potential for loose or broken connections found in traditional designs. Furthermore, the tight integration of the mid-mounted motor assembly with the frame reduces the need for additional connectors, minimizes material waste, and thus reduces manufacturing costs, while also enhancing the overall vehicle's lightweighting.

[0016] 2. In the present invention, the motor and the motor driver are integrated together, which can simplify the body wiring. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is an exploded schematic diagram of the mid-mounted motor assembly in an embodiment of the present utility model;

[0018] Figure 2 It is a schematic diagram of the combination of the mid-mounted motor assembly in an embodiment of the present utility model. DETAILED DESCRIPTION

[0019] The present invention will be further described below in conjunction with the accompanying drawings. It should be noted that this embodiment is based on the technical solution and provides a detailed implementation method and specific operation process, but the protection scope of the present invention is not limited to this embodiment.

[0020] This embodiment provides a mid-mounted motor assembly combined with a vehicle frame, such as Figure 1-2 As shown, it includes a motor barrel 1, a side cover 1 2, a side cover 2 3, a top cover 4, a rotor shaft 5, a vehicle transmission wheel 6, a bearing 2 7, a bearing 1 8, a motor threading hole plug 9, a battery power supply plug 10, a permanent magnet synchronous motor (not shown in the figure) and a permanent magnet synchronous motor driver 11.

[0021] The side cover 1 2 and the side cover 2 3 are respectively fixed on both sides of the motor barrel 1, and the top cover 4 is fixed on the top surface of the motor barrel 1. There is space inside the motor barrel 1, and the rotor shaft 5, bearing 2 7, bearing 1 8, permanent magnet synchronous motor and permanent magnet synchronous motor driver 11 are all arranged inside the motor barrel 1; the rotor shaft 5 is connected to the rotor of the permanent magnet synchronous motor as the output shaft of the permanent magnet synchronous motor, and its two ends pass through the two ends of the permanent magnet synchronous motor and are respectively connected to bearing 1 8 and bearing 2 7; the permanent magnet synchronous motor is connected to the permanent magnet synchronous motor driver 11; bearing 1 8 and bearing 2 7 are respectively fixed to side cover 1 2 and side cover 2 3; one end of the rotor shaft 5 passes through the outside of the side cover 2 3 and is coaxially fixedly connected to the vehicle transmission wheel 6.

[0022] The upper part of the side cover 2 is provided with three M8 threaded holes 21 for connecting to the frame of an electric vehicle (electric bicycle / electric motorcycle, etc.), and the lower part is provided with several M12 threaded holes 22 for connecting to the rear fork structure of the electric vehicle; the inner side surface of the side cover 2 is provided with a bearing groove 23 for placing a bearing 8.

[0023] The upper part of the side cover 23 is provided with four M8 threaded holes 31 for connecting to the frame adapter plate of the electric vehicle, and the frame adapter plate is connected to the main frame of the electric vehicle; the lower part of the side cover 23 is reserved with several M6 expansion threaded holes 32 for installing expansion accessories; the side cover 23 is provided with a bearing hole 33 for placing the bearing 27.

[0024] The top cover 4 is provided with a motor threading hole 41, and a motor threading hole plug 9 is sealed in the motor threading hole 41, and the motor threading hole plug 9 can allow the line to pass through. The top cover 4 is provided with an installation hole 42 for installing the battery power supply plug 10.

[0025] The vehicle transmission wheel 6 is used to transmit the power of the rotor shaft 5 to the transmission chain or transmission belt of the electric vehicle. When the vehicle adopts chain drive, the vehicle transmission wheel 6 adopts a sprocket, and when the vehicle adopts belt drive, the vehicle transmission wheel 6 adopts a pulley.

[0026] Bearing 1 8 and bearing 2 7 are used to support and position the rotor shaft and absorb axial and radial loads.

[0027] The motor wire hole plug 9 can block the cable channel, protect the cables, provide insulation protection and fix the cables.

[0028] The vehicle's battery can be plugged into the battery power plug 10 of the motor assembly, achieving convenient charging, flexible battery replacement, safe connection, space saving and aesthetic design.

[0029] Those skilled in the art can make various corresponding changes and modifications based on the above technical solutions and concepts, and all of these changes and modifications should be included in the scope of protection of the claims of this utility model.

Claims

1. A mid-mounted motor assembly combined with a vehicle frame, characterized in that: It comprises a motor barrel (1), a side cover 1 (2), a side cover 2 (3), a top cover (4), a rotor shaft (5), a vehicle transmission wheel (6), a bearing 2 (7), a bearing 1 (8), a permanent magnet synchronous motor and a permanent magnet synchronous motor driver (11); The side cover 1 (2) and the side cover 2 (3) are respectively fixed to the two sides of the motor barrel (1), the top cover (4) is fixed to the top surface of the motor barrel (1), the motor barrel (1) has a space inside, and the rotor shaft (5), the bearing 2 (7), the bearing 1 (8), the permanent magnet synchronous motor and the permanent magnet synchronous motor driver (11) are all arranged inside the motor barrel (1); the rotor shaft (5) is connected to the rotor of the permanent magnet synchronous motor as the output shaft of the permanent magnet synchronous motor, and its two ends pass through the two ends of the permanent magnet synchronous motor and are respectively connected to the bearing 1 (8) and the bearing 2 (7); the permanent magnet synchronous motor is connected to the permanent magnet synchronous motor driver (11); the bearing 1 (8) and the bearing 2 (7) are respectively fixed to the side cover 1 (2) and the side cover 2 (3); one end of the rotor shaft (5) passes through the outside of the side cover 2 (3) and is coaxially fixedly connected to the vehicle transmission wheel (6); The upper portion of the side cover 1 (2) is provided with a plurality of threaded holes 1 (21) for connecting with the frame of the electric vehicle, and the lower portion is provided with a plurality of threaded holes 2 (22) for connecting with the rear flat fork structure of the electric vehicle; the upper portion of the side cover 2 (3) is provided with a plurality of threaded holes 3 (31) for connecting with the frame adapter plate of the electric vehicle, and the frame adapter plate is connected to the main frame of the electric vehicle.

2. The mid-mounted motor assembly according to claim 1, characterized in that: The top cover (4) is provided with a motor threading hole (41), and a motor threading hole plug (9) is provided to seal the motor threading hole (41), and the motor threading hole plug (9) can allow a line to pass through.

3. The mid-mounted motor assembly according to claim 1, characterized in that: A battery power supply plug (10) is provided on the top cover (4).

4. The mid-mounted motor assembly according to claim 1, characterized in that: The inner side surface of the side cover 1 (2) is provided with a bearing groove (23) for accommodating the bearing 1 (8).

5. The mid-mounted motor assembly according to claim 1, characterized in that: The side cover 2 (3) is provided with a bearing hole (33) for placing the bearing 2 (7).

6. The mid-mounted motor assembly according to claim 1, characterized in that: A plurality of expanded threaded holes (32) are reserved at the lower portion of the side cover 2 (3).

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