A middle-embedded motor with an outer rotor

Abstract

The application discloses a middle-embedded motor with an outer rotor. The middle-embedded motor with the outer rotor comprises a stator shaft, a left hexagonal nut, a left flange hexagonal nut, a left pull piece, a left rotation-stopping piece, a pressing plate, a chain disc, a connecting piece, a rotor rim, a right rotation-stopping piece, a right pull piece, a right flange hexagonal nut and a right hexagonal nut which are sequentially arranged on the stator shaft from left to right; and the chain disc rotates along with the rotor rim when the rotor rim rotates around the stator shaft. The middle-embedded motor with the outer rotor solves the technical problem that the torque transmitted by the middle shaft during operation is small, the gear box bears a large load during long-term use, and the gear box is extremely easy to be damaged, thereby increasing the maintenance cost of users and reducing the use reliability of vehicles.

Description

Technical Field

[0001] This application relates to the field of motor technology, specifically to a mid-mounted motor with an external rotor. Background Technology

[0002] In the field of vehicles such as two-wheeled vehicles and 3D off-road bicycles, the performance of the drive system plays a crucial role in the overall performance of the vehicle. Currently, the most common drive systems on the market are those with an internal rotor motor and an external gearbox. The traditional method of using an internal rotor motor with a gearbox for reduction has significant drawbacks. Because the torque transmitted by the intermediate shaft during operation is relatively small, the gearbox bears a heavy load under long-term use, making it prone to damage. This not only increases the user's maintenance costs but also reduces the reliability of the vehicle.

[0003] Meanwhile, in existing technologies, the flywheel is usually directly mounted on the shaft. This mounting method has certain limitations. In actual use, it is difficult to meet diverse transmission needs, and it is also inconvenient in terms of assembly and maintenance. In addition, the gear reduction structure generates a lot of noise during operation, affecting the user's riding experience, and requires regular maintenance, increasing the manpower and material costs during use.

[0004] Therefore, it is necessary to provide a mid-mounted motor with an external rotor to solve the above problems. Summary of the Invention

[0005] In view of the above-mentioned problems in the prior art, the purpose of this application is to provide a mid-mounted motor with an external rotor to solve the problems mentioned in the background art.

[0006] The technical solution adopted by this application to solve its technical problem is: a mid-mounted motor with an external rotor, including a stator shaft, on which a left hexagonal nut, a left flange hexagonal nut, a left pull plate, a left anti-rotation plate, a pressure plate, a chain, a connecting piece, a rotor wheel, a right anti-rotation plate, a right pull plate, a right flange hexagonal nut, and a right hexagonal nut are installed sequentially from left to right on the stator shaft. When the rotor wheel rotates around the stator shaft, the chain also rotates together with the rotor wheel.

[0007] Furthermore, the stator shaft has a first shaft end, a second shaft end, and a third shaft end, with the first shaft end and the second shaft end located at opposite ends of the stator shaft, and the second shaft end being adjacent to the first shaft end.

[0008] Furthermore, the left hexagonal nut, the left flange hexagonal nut, the left pull plate, and the left anti-rotation plate are all keyed to the first shaft end; the pressure plate, chain disc, and connecting piece are all rotatably connected to the second shaft end; the rotor wheel rim is rotatably connected to the stator shaft and located between the second and third shaft ends; and the right anti-rotation plate, the right pull plate, the right flange hexagonal nut, and the right hexagonal nut are all keyed to the third shaft end.

[0009] Furthermore, the rotor wheel ring has end caps at the center of both the left and right sides, and one end of the connector is a connecting section. Several connecting grooves are spaced apart along the circumference of the connecting section, and the connecting grooves form a keyway connection with the inner circumferential wall of the end cap.

[0010] Furthermore, the connector is also provided with a stepped section and a driving section. The stepped section is located between the driving section and the connecting section. The driving section is provided with a number of protruding teeth at intervals along the circumferential direction. The inner circumferential wall of the chain disk is provided with chain disk grooves that match the protruding teeth.

[0011] Furthermore, the chain disc has two symmetrical chain disc connection holes, and the pressure plate has pressure plate connection holes that correspond one-to-one with the chain disc connection holes.

[0012] Furthermore, the inner peripheral wall of the pressure plate is formed with a pressure plate groove that matches the shape of the chain disc groove.

[0013] The beneficial effects of this application are as follows: The centrally mounted motor with an external rotor provided by this application simplifies the assembly steps by connecting the drive chain on the outside of the rotor wheel ring, while eliminating the need for a gear reducer, increasing the service life of the motor, making it less prone to damage, reducing user costs, and solving the technical problem that the gearbox is easily damaged under long-term use due to the small torque transmitted by the intermediate shaft during operation, which not only increases the user's maintenance costs but also reduces the reliability of vehicle use.

[0014] In addition to the purposes, features, and advantages described above, this application has other purposes, features, and advantages. A further detailed description of this application will be provided below with reference to the figures. Attached Figure Description

[0015] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

[0016] Figure 1 This is an overall schematic diagram of the present application;

[0017] Figure 2 An exploded view of the various components installed in this application;

[0018] Figure 3 This is a schematic diagram of the stator shaft of this application;

[0019] Figure 4 This is a schematic diagram of the front view of this application;

[0020] Figure 5 This is a schematic front sectional view of this application;

[0021] The following are the labeling elements in the figure:

[0022] 1. Rotor wheel rim; 11. End cap; 2. Connector; 21. Connecting section; 211. Connecting groove; 22. Stepped section; 23. Drive section; 231. Protruding tooth; 3. Chain disc; 31. Chain disc groove; 32. Chain disc connecting hole; 4. Pressure plate; 41. Pressure plate groove; 42. Pressure plate connecting hole; 5. Left anti-rotation plate; 51. Right anti-rotation plate; 6. Left pull plate; 61. Right pull plate; 7. Left flange hexagonal nut; 71. Right flange hexagonal nut; 8. Left hexagonal nut; 81. Right hexagonal nut; 9. Stator shaft; 91. First shaft end; 92. Second shaft end; 93. Third shaft end. Detailed Implementation

[0023] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0024] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0025] like Figure 1-5 As shown, this application provides a technical solution: a mid-mounted motor with an external rotor, including a stator shaft 9. From left to right, the stator shaft 9 is sequentially equipped with a left hexagonal nut 8, a left flange hexagonal nut 7, a left pull plate 6, a left anti-rotation plate 5, a pressure plate 4, a chain 3, a connecting piece 2, a rotor wheel rim 1, a right anti-rotation plate 51, a right pull plate 61, a right flange hexagonal nut 71, and a right hexagonal nut 81. When the rotor wheel rim 1 rotates around the stator shaft 9, the chain 3 also rotates together with the rotor wheel rim 1.

[0026] The stator shaft 9 has a first shaft end 91, a second shaft end 92 and a third shaft end 93. The first shaft end 91 and the second shaft end 92 are located at the two ends of the stator shaft 9, respectively, and the second shaft end 92 is adjacent to the first shaft end 91.

[0027] The left hexagonal nut 8, the left flange hexagonal nut 7, the left pull plate 6, and the left anti-rotation plate 5 are all keyed to the first shaft end 91. The pressure plate 4, the chain 3, and the connecting piece 2 are all rotatably connected to the second shaft end 92. The rotor wheel rim 1 is rotatably connected to the stator shaft 9 and is located between the second shaft end 92 and the third shaft end 93. The right anti-rotation plate 51, the right pull plate 61, the right flange hexagonal nut 71, and the right hexagonal nut 81 are all keyed to the third shaft end 93.

[0028] The rotor wheel rim 1 has end caps 11 at the center of both the left and right sides. One end of the connector 2 is a connecting section 21. Several connecting grooves 211 are spaced apart along the circumference of the connecting section 21. The connecting grooves 211 and the inner circumferential wall of the end cap 11 form a keyway connection.

[0029] The connector 2 is also provided with a stepped section 22 and a drive section 23. The stepped section 22 is located between the drive section 23 and the connecting section 21. The drive section 23 is provided with a number of protruding teeth 231 at intervals along the circumferential direction. The inner circumferential wall of the chain disk 3 is provided with chain disk grooves 31 that match the protruding teeth 231.

[0030] Two chain plate connection holes 32 are symmetrically opened on the chain plate 3, and the pressure plate 4 is provided with pressure plate connection holes 42 that correspond one-to-one with the chain plate connection holes 32.

[0031] The inner peripheral wall of the pressure plate 4 is formed with a pressure plate groove 41 that is consistent with the shape of the chain disc groove 31.

[0032] In one embodiment, the motor operates as follows.

[0033] Specifically, the rotor wheel rim 1 is installed in the middle of the stator shaft 9, and the connecting groove 211 is keyed to the end cover 11. The chain disc groove 31 is fitted onto the protruding tooth 231 on the drive section 23, and then the pressure plate groove 41 is also fitted onto the protruding tooth 231. At this time, the chain disc connecting hole 32 corresponds to the pressure plate connecting hole 42. The chain disc connecting hole 32 and the pressure plate connecting hole 42 are fixed by fasteners, and then the chain disc 3 is fixed on the drive section 23. Then, the left anti-rotation plate 5, the left pull plate 6, the left flange hexagonal nut 7 and the left hexagonal nut 8 are fitted onto the first shaft end 91 and fixed. Then, the right anti-rotation plate 51, the right pull plate 61, the right flange hexagonal nut 71 and the right hexagonal nut 81 are fitted onto the third shaft end 93 and fixed.

[0034] According to the Hall effect, the rotor wheel rim 1 starts to rotate, which drives the connecting part 2 to rotate. The connecting part 2 drives the front chain disc 3 to rotate, which in turn drives other components to rotate via the chain. The chain disc 3 can be driven without a gear reducer, which increases the service life of the motor, makes it less prone to damage, and reduces the user's maintenance costs.

[0035] In summary, this device simplifies the assembly process by connecting the chain 3 to the outer side of the rotor wheel rim 1, eliminates the need for a gear reducer, increases the service life of the motor, reduces its susceptibility to damage, and lowers user costs. It also solves the technical problem that currently, due to the relatively low torque transmitted by the intermediate shaft during operation, the gearbox is subjected to heavy loads under long-term use, making it prone to damage, which not only increases user maintenance costs but also reduces vehicle reliability.

[0036] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A mid-mounted motor with an external rotor, comprising a stator shaft (9), characterized in that: The stator shaft (9) is equipped with, from left to right, a left hexagonal nut (8), a left flange hexagonal nut (7), a left pull plate (6), a left anti-rotation plate (5), a pressure plate (4), a chain disc (3), a connector (2), a rotor wheel (1), a right anti-rotation plate (51), a right pull plate (61), a right flange hexagonal nut (71), and a right hexagonal nut (81). When the rotor wheel (1) rotates around the stator shaft (9), the chain disc (3) also rotates together with the rotor wheel (1).

2. A mid-mounted motor with an external rotor according to claim 1, characterized in that: The stator shaft (9) has a first shaft end (91), a second shaft end (92) and a third shaft end (93). The first shaft end (91) and the second shaft end (92) are located at the two ends of the stator shaft (9), respectively, and the second shaft end (92) is adjacent to the first shaft end (91).

3. A mid-mounted motor with an external rotor according to claim 2, characterized in that: The left hexagonal nut (8), the left flange hexagonal nut (7), the left pull plate (6), and the left anti-rotation plate (5) are all keyed to the first shaft end (91). The pressure plate (4), the chain disc (3), and the connecting piece (2) are all rotatably connected to the second shaft end (92). The rotor wheel (1) is rotatably connected to the stator shaft (9) and located between the second shaft end (92) and the third shaft end (93). The right anti-rotation plate (51), the right pull plate (61), the right flange hexagonal nut (71), and the right hexagonal nut (81) are all keyed to the third shaft end (93).

4. A mid-mounted motor with an external rotor according to claim 3, characterized in that: The rotor wheel (1) has end caps (11) at the center of both the left and right sides. One end of the connector (2) is a connecting section (21). Several connecting grooves (211) are spaced apart along the circumferential direction on the connecting section (21). The connecting grooves (211) and the inner circumferential wall of the end cap (11) form a keyway connection.

5. A mid-mounted motor with an external rotor according to claim 4, characterized in that: The connector (2) is also provided with a stepped section (22) and a driving section (23). The stepped section (22) is located between the driving section (23) and the connecting section (21). The driving section (23) is provided with a number of protruding teeth (231) at intervals along the circumferential direction. The inner circumferential wall of the chain disc (3) is provided with a chain disc groove (31) that matches the protruding teeth (231).

6. A mid-mounted motor with an external rotor according to claim 5, characterized in that: Two chain drive connection holes (32) are symmetrically opened on the chain drive (3), and the pressure plate (4) is provided with pressure plate connection holes (42) that correspond one-to-one with the chain drive connection holes (32).

7. A mid-mounted motor with an external rotor according to claim 6, characterized in that: The inner peripheral wall of the pressure plate (4) is formed with a pressure plate groove (41) that is consistent with the shape of the chain groove (31).

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