A liquid-cooled hub motor for electric vehicles

Abstract

This utility model relates to the field of electric vehicle motor technology, specifically disclosing a liquid-cooled hub motor for electric vehicles. The liquid-cooled hub motor includes: a motor side cover, a guide plate, several clips, and several fixing posts. Several skirts protrude from the outer periphery of the guide plate, and these skirts are fitted and enclosed with the motor side cover to form a storage chamber for storing coolant. Several clips are arranged circumferentially on the guide plate, and several fixing posts are arranged on the motor side cover, with each fixing post corresponding to one of the clips. The clips and fixing posts engage with each other. This arrangement facilitates installation and fixation through the engagement of the clips with the corresponding fixing posts, and achieves axial pressing and positioning of the guide plate, ensuring that the outer ring of the guide plate is pressed tightly against the motor side cover. This adapts to a wide temperature range and vibration conditions, improving stability. It balances locking strength with ease of assembly, simplifies the overall structure, and effectively reduces resource costs.

Description

Technical Field

[0001] This utility model relates to the field of electric vehicle motor technology, and in particular to a liquid-cooled hub motor for electric vehicles. Background Technology

[0002] With the development and popularization of transportation, electric two-wheelers are playing an increasingly important role in people's daily travel. Furthermore, with technological advancements and the trend towards electrification, electric two-wheelers will gradually replace traditional gasoline-powered motorcycles. As the core component of electric two-wheelers, the hub motor's main function is to provide continuous and stable power. When riding an electric two-wheeler, especially during starting, uphill riding, or under heavy loads, the motor is prone to overheating, which can even burn it out and severely affect its normal operation. Therefore, appropriate measures should be taken to cool the motor.

[0003] The existing hub motors of electric two-wheeled vehicles usually use direct injection of cooling oil, and a guide ring is set inside the hub motor to guide the directional flow of cooling oil to improve the cooling effect. However, most of the existing guide rings are fastened with bolts, which has low assembly efficiency and is prone to loosening and movement due to long-term vibration.

[0004] Therefore, there is an urgent need for a liquid-cooled hub motor for electric vehicles to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a liquid-cooled hub motor for electric vehicles to solve the problems of low assembly efficiency and poor stability of the internal guide ring in existing liquid-cooled hub motors.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] This utility model provides a liquid-cooled hub motor for electric vehicles, comprising:

[0008] Motor side cover;

[0009] A guide plate, wherein a plurality of skirts are protruding along the outer periphery of the guide plate, the plurality of skirts are disposed on the side of the guide plate near the motor side cover, the plurality of skirts are attached to and enclosed with the motor side cover to form a storage chamber, the storage chamber being used to store coolant;

[0010] A plurality of clips are provided on the guide plate along the circumferential direction;

[0011] A plurality of fixing posts are provided on the motor side cover, and the plurality of fixing posts are provided in a one-to-one correspondence with a plurality of buckles, wherein the buckles are engaged with the fixing posts.

[0012] As a preferred technical solution for the liquid-cooled hub motor for electric vehicles, the guide plate is provided with a first baffle, which is disposed on one side of the buckle and abuts against the outer wall of the fixing column.

[0013] As a preferred technical solution for the liquid-cooled hub motor for electric vehicles, the guide plate is further provided with a second baffle, which is located on the other side of the buckle, and the fixing post is engaged between the first baffle and the second baffle.

[0014] As a preferred technical solution for the liquid-cooled hub motor for electric vehicles, the first baffle has a first guide slope, which is used to guide the fixing post to be engaged between the first baffle and the second baffle.

[0015] As a preferred technical solution for the liquid-cooled hub motor for electric vehicles, the second baffle has a second guide slope, which is used to guide the fixing post to be engaged between the first baffle and the second baffle.

[0016] As a preferred technical solution for the liquid-cooled hub motor for electric vehicles, both the first baffle and the second baffle are integrally formed with the guide plate.

[0017] As a preferred technical solution for the aforementioned liquid-cooled hub motor for electric vehicles, the buckle is made of an elastic material.

[0018] As a preferred technical solution for the liquid-cooled hub motor for electric vehicles, the guide plate is in the shape of a ring.

[0019] As a preferred technical solution for the above-mentioned liquid-cooled hub motor for electric vehicles, the liquid-cooled hub motor for electric vehicles further includes a plurality of guide vanes, which are arranged along the circumferential direction and protrude from the guide plate. The guide vanes have a guide arc surface, which is used to guide the coolant into the storage chamber.

[0020] As a preferred technical solution for the liquid-cooled hub motor for electric vehicles, the guide vane is fan-shaped.

[0021] The beneficial effects of this utility model are as follows:

[0022] This utility model provides a liquid-cooled hub motor for electric vehicles. The motor includes a motor side cover, a guide plate, several clips, and several fixing posts. Several skirts protrude from the outer periphery of the guide plate, positioned near the motor side cover. These skirts, together with the motor side cover, form a storage chamber for storing coolant. Several clips are arranged circumferentially on the guide plate, and several fixing posts are positioned on the motor side cover, with each fixing post corresponding to one of the clips. The clips and fixing posts engage in a snap-fit ​​connection. This arrangement facilitates installation and fixation, and provides axial compression and positioning of the guide plate, ensuring its outer ring is pressed firmly against the motor side cover. This design adapts to wide temperature ranges and vibration conditions, improving stability. It balances locking strength with ease of assembly, simplifies the overall structure, and effectively reduces resource costs. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the assembly of the motor side cover and the guide plate provided by this utility model;

[0024] Figure 2 Schematic diagram of the flow guide plate provided by this utility model Figure 1 ;

[0025] Figure 3 Schematic diagram of the flow guide plate provided by this utility model Figure 2 ;

[0026] Figure 4 A cross-sectional view of the assembly of the motor side cover and the guide plate provided by this utility model;

[0027] Figure 5 Partial cross-section of the assembly of the motor side cover and the guide plate provided by this utility model Figure 1 ;

[0028] Figure 6 Partial cross-section of the assembly of the motor side cover and the guide plate provided by this utility model Figure 2 .

[0029] in:

[0030] 1. Motor side cover; 2. Guide plate; 3. Skirt; 4. Storage chamber; 5. Buckle; 6. Fixing column; 7. First baffle; 8. Second baffle; 9. Guide vane. Detailed Implementation

[0031] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0032] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," 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 do not 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. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions.

[0033] Unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing" should be interpreted broadly. For example, they can refer to fixed connections or detachable connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and connections within two components or interactions between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0034] Unless otherwise expressly specified and limited, "above" or "below" a second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of a second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" of a second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0035] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0036] like Figures 1 to 6As shown, this embodiment provides a liquid-cooled hub motor for electric vehicles. The liquid-cooled hub motor includes: a motor side cover 1, a guide plate 2, several clips 5, and several fixing posts 6. Several skirts 3 protrude from the outer periphery of the guide plate 2, and are located on the side of the guide plate 2 near the motor side cover 1. The skirts 3 and the motor side cover 1 are fitted together to form a storage chamber 4 for storing coolant. Several clips 5 are arranged circumferentially on the guide plate 2, and several fixing posts 6 are arranged on the motor side cover 1, with each fixing post 6 corresponding to one of the clips 5. The clips 5 and fixing posts 6 engage with each other. This arrangement facilitates installation and fixation through the engagement between the clips 5 and the corresponding fixing posts 6, and achieves axial pressing and positioning of the guide plate 2, ensuring that the outer ring of the guide plate 2 is pressed against the motor side cover 1. This adapts to a wide temperature range and vibration conditions, improving stability. It balances locking strength and ease of assembly, simplifies the structural assembly, and effectively reduces resource costs.

[0037] It should be noted that the assembly tolerance of the clip 5 and the fixed part is set to a negative dimension to ensure that after fastening, the outermost skirt 3 of the guide plate 2 can closely abut against the motor side cover 1. When the liquid-cooled hub motor rotates, it will not cause vibration and noise problems due to the assembly gap. In addition, the liquid-cooled hub motor generates heat during operation, which will cause deformation of the guide plate 2. The amount of thermal deformation must also be less than the negative dimension of the guide plate 2 assembly to ensure a tight fit between the guide plate 2 and the motor side cover 1.

[0038] Optionally, the guide plate 2 is provided with a first baffle 7, which is located on one side of the buckle 5 and abuts against the outer wall of the fixing post 6. The guide plate 2 is also provided with a second baffle 8, which is located on the other side of the buckle 5. The fixing post 6 is engaged between the first baffle 7 and the second baffle 8. With this arrangement, the first baffle 7 and the second baffle 8 are arranged opposite to each other to form a "clamping" structure, which restricts and constrains the fixing post 6 between the two, further preventing the guide plate 2 from rotating or shifting, and ensuring the stability and reliability of the assembly structure.

[0039] Optionally, the first baffle 7 has a first guide ramp, and the second baffle 8 has a second guide ramp. Both the first and second guide ramps are used to guide the fixing post 6 to engage between the first baffle 7 and the second baffle 8. This configuration allows the inclined structure of the ramps to guide the fixing post 6 to slide smoothly between the first baffle 7 and the second baffle 8, facilitating assembly, avoiding hard impacts or misalignment, and reducing the need for manual intervention. It is particularly suitable for automated assembly scenarios. Simultaneously, the angle design of the ramps allows for a more even distribution of force, preventing fatigue failure of one-sided baffles due to long-term uneven loading.

[0040] Optionally, both the first baffle 7 and the second baffle 8 are integrally formed with the guide plate 2. This configuration results in better structural stability, reduces the number of additional parts, lowers assembly complexity, and effectively improves production efficiency.

[0041] Optionally, the buckle 5 is made of an elastic material. It should be noted that the buckle 5 is provided with process pressure points, and can be press-fitted using dedicated automated equipment after mass production.

[0042] Optionally, the guide plate 2 is annular.

[0043] Optionally, to better guide the directional flow of cooling oil and improve the cooling effect, the liquid-cooled hub motor for electric vehicles also includes several guide vanes 9. These guide vanes 9 are arranged circumferentially and protrude from the guide plate 2. Each guide vane 9 has a guiding arc surface, which is used to guide the coolant into the storage chamber 4. Further, the guide vanes 9 are fan-shaped.

[0044] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A liquid-cooled wheel hub motor for an electric vehicle, characterized by, include: Motor side cover (1); A guide plate (2) is provided with several skirts (3) protruding from its outer periphery. Several skirts (3) are provided on the side of the guide plate (2) close to the motor side cover (1). Several skirts (3) are attached to the motor side cover (1) and surround it to form a storage chamber (4). The storage chamber (4) is used to store coolant. A plurality of buckles (5) are arranged in the circumferential direction on the guide plate (2); A plurality of fixing posts (6) are provided on the motor side cover (1), and the plurality of fixing posts (6) are provided in a one-to-one correspondence with the plurality of buckles (5), and the buckles (5) are engaged with the fixing posts (6).

2. The liquid-cooled in-wheel motor for an electric vehicle according to claim 1, characterized by, The guide plate (2) is provided with a first baffle (7), which is located on one side of the buckle (5) and abuts against the outer wall of the fixing post (6).

3. The liquid-cooled in-wheel motor for electric vehicles according to claim 2, characterized by, The guide plate (2) is also provided with a second baffle (8), which is located on the other side of the buckle (5), and the fixing post (6) is engaged between the first baffle (7) and the second baffle (8).

4. The liquid-cooled hub motor for electric vehicles according to claim 3, characterized in that, The first baffle (7) has a first guide slope, which is used to guide the fixing post (6) to be engaged between the first baffle (7) and the second baffle (8).

5. The liquid-cooled in-wheel motor for electric vehicles according to claim 4, characterized by, The second baffle (8) has a second guide slope, which is used to guide the fixing post (6) to be engaged between the first baffle (7) and the second baffle (8).

6. The liquid-cooled in-wheel motor for electric vehicles according to claim 3, characterized by Both the first baffle (7) and the second baffle (8) are integrally formed with the guide plate (2).

7. The liquid-cooled in-wheel motor for electric vehicles according to any one of claims 1 to 6, characterized by, The buckle (5) is made of elastic material.

8. The liquid-cooled in-wheel motor for electric vehicles according to any one of claims 1 to 6, characterized by, The guide plate (2) is in the shape of a ring.

9. The liquid-cooled hub motor for electric vehicles according to any one of claims 1-6, characterized in that, The liquid-cooled hub motor for electric vehicles also includes several guide vanes (9), which are arranged along the circumferential direction and protrude from the guide plate (2). The guide vanes (9) have a guide arc surface, which is used to guide the coolant into the storage chamber (4).

10. The liquid-cooled in-wheel motor for electric vehicles according to claim 9, characterized by, The guide vane (9) is fan-shaped.

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