Hub motor with electromagnetic brake and vehicle

Abstract

The utility model provides a wheel hub motor with an electromagnetic brake and a vehicle, the inner diameter of a base is connected to a shaft, the outer diameter of the base is connected with the other side of a wheel hub shell through a waterproof bearing, a static plate and a movable plate are respectively connected with the base, a brake pad is located between the static plate and the movable plate, a certain gap is formed between the static plate and the movable plate, and the brake pad is connected with a rotor of a motor body through a connecting cover. The sealing ring is connected between the shaft and the inner diameter of the base, the inner O-shaped ring is connected between the outer diameter of the base and the inner diameter of the waterproof bearing, and the outer O-shaped ring is connected between the outer diameter of the waterproof bearing and the hub shell. The waterproof design of the utility model can effectively improve the reliability and safety of the device and prolong the service life of the device. The structure of the electromagnetic brake is optimized, the assembling efficiency of the electromagnetic brake module is improved, the manufacturing cost can be directly reduced, meanwhile, the process stability can be improved, and the quality consistency is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, specifically to a hub motor with electromagnetic brake and a vehicle. Background Technology

[0002] Patent document CN202424397U discloses a hub motor with electromagnetic brake, including a motor, a reducer, a motor output shaft, a front hub, and a rear hub. The feature is that the motor is equipped with an electromagnetic brake, and the assembled motor with electromagnetic brake and reducer are fixed by bearings in the hub formed by the front hub and the rear hub.

[0003] This type of hub motor structure with electromagnetic brake integrates the electromagnetic brake on the side of the motor. When power is off, the electromagnetic brake activates to ensure safety. However, existing hub motor structures with electromagnetic brakes have two drawbacks: 1. They lack a waterproof structure, making the entire motor susceptible to water ingress, which can damage the electromagnetic brake and the motor structure. 2. Assembly is difficult, reducing overall production efficiency and making it hard to guarantee quality. Utility Model Content

[0004] In view of the deficiencies in the prior art, the purpose of this utility model is to provide a hub motor and vehicle with electromagnetic brake.

[0005] According to the present invention, a hub motor with electromagnetic brake is provided, comprising: a shaft 2, an electromagnetic brake device 3, a connecting cover 4, a hub housing 5, and a motor body 6.

[0006] The motor body 6 and the electromagnetic brake device 3 are mounted on the shaft 2, and one end of the shaft 2 is connected to one side of the hub housing 5 through a bearing;

[0007] The electromagnetic braking device 3 includes: a base 301, a waterproof bearing 302, a moving plate 303, a stationary plate 304, a brake pad 305, a sealing ring 306, an inner O-ring 307, and an outer O-ring 308.

[0008] The inner diameter of the base 301 is connected to the shaft 2, and the outer diameter is connected to the other side of the hub housing 5 through the waterproof bearing 302. The stationary plate 304 and the moving plate 303 are respectively connected to the base 301. The brake pad 305 is located between the stationary plate 304 and the moving plate 303 and has a certain gap. The brake pad 305 is connected to the rotor of the motor body 6 through the connecting cover 4. The sealing ring 306 is connected between the shaft 2 and the inner diameter of the base 301. The inner O-ring 307 is connected between the outer diameter of the base 301 and the inner diameter of the waterproof bearing 302. The outer O-ring 308 is connected between the outer diameter of the waterproof bearing 302 and the hub housing 5.

[0009] Furthermore, the hub motor with electromagnetic brake also includes a rubber block 9, which is interference-fitted into the gap between the brake pad 305 and the rotor.

[0010] Furthermore, the hub motor with electromagnetic brake also includes a waterproof line 1 and a circuit board 8. The circuit board 8 is electrically connected to the stator of the motor body 6, and the waterproof line 1 is electrically connected to the circuit board 8.

[0011] Furthermore, the electromagnetic braking device 3 also includes a brake signal line 309, which is electrically connected to the circuit board 8.

[0012] Furthermore, a cable outlet channel is provided inside the shaft 2, through which the waterproof cable 1 passes and connects to external equipment.

[0013] Furthermore, the minimum outer diameter of the brake pad 305 is greater than the outer diameter of the waterproof bearing 302.

[0014] Furthermore, the hub motor with electromagnetic brake also includes a planetary reduction gear 7. The inner diameter of the planetary reduction gear 7 is connected to the shaft 2, and the rotor of the motor body 6 drives the hub housing 5 to rotate through the planetary reduction gear 7.

[0015] Furthermore, the planetary reduction gear 7 is located on the side of the motor body 6 away from the electromagnetic brake device 3.

[0016] Furthermore, the brake signal line 309 is exposed on the outside of the circuit board 8.

[0017] A vehicle according to this utility model includes the aforementioned hub motor with electromagnetic brake.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] This invention incorporates waterproof design for all connecting structures of the electromagnetic brake, preventing water vapor and salt spray from penetrating the electromagnetic brake and motor, thereby effectively improving the reliability, safety, and service life of the device.

[0020] This invention optimizes the electromagnetic brake structure, improves the assembly efficiency of the electromagnetic brake module, directly reduces manufacturing costs, and enhances process stability to ensure consistent quality. Attached Figure Description

[0021] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0022] Figure 1This is a cross-sectional view of the present invention;

[0023] Figure 2 This is a side view of the present invention. Detailed Implementation

[0024] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the present invention in any way. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all fall within the protection scope of the present invention.

[0025] like Figure 1 As shown, the present invention provides a hub motor with electromagnetic brake, comprising: a waterproof line 1, a shaft 2, an electromagnetic brake device 3, a connecting cover 4, a hub housing 5, a motor body 6, a planetary reduction gear 7, a circuit board 8, and a rubber block 9.

[0026] The motor body 6 and the electromagnetic brake device 3 are mounted on the shaft 2, with one end of the shaft 2 connected to one side of the hub housing 5 via a bearing. The inner diameter of the planetary reducer 7 is connected to the shaft 2, located on the side of the motor body 6 away from the electromagnetic brake device 3. The rotor of the motor body 6 drives the hub housing 5 to rotate via the planetary reducer 7. The circuit board 8 is electrically connected to the stator of the motor body 6, and the waterproof cable 1 is electrically connected to the circuit board 8. The rubber block 9 is interference-fitted into the gap between the brake pad 305 and the rotor, tensioning the brake pad 305 and the motor rotor to reduce vibration. The rubber block 9 is preferentially evenly distributed between the two, resulting in uniform force distribution and better performance. A cable outlet channel is provided inside the shaft 2, through which the waterproof cable 1 passes to connect to external equipment.

[0027] The electromagnetic braking device 3 includes: a base 301, a waterproof bearing 302, a moving plate 303, a stationary plate 304, a brake pad 305, a sealing ring 306, an inner O-ring 307, an outer O-ring 308, and a brake signal line 309. The inner diameter of the base 301 is connected to the shaft 2, and the outer diameter is connected to the other side of the hub housing 5 through the waterproof bearing 302. The stationary plate 304 and the moving plate 303 are respectively connected to the base 301. The brake pad 305 is located between the stationary plate 304 and the moving plate 303 with a certain gap. The brake pad 305 is connected to the rotor of the motor body 6 through the connecting cover 4. The sealing ring 306 is connected between the shaft 2 and the inner diameter of the base 301. The inner O-ring 307 is connected between the outer diameter of the base 301 and the inner diameter of the waterproof bearing 302. The outer O-ring 308 is connected between the outer diameter of the waterproof bearing 302 and the hub housing 5. The brake signal line 309 is electrically connected to the circuit board 8.

[0028] To better assemble the electromagnetic brake device 3, this invention pre-installs the waterproof bearing 302 on the base 301, so that the electromagnetic brake device 3 can be easily inserted when installing the connecting cover 4 and the housing 5. Figure 2 As shown, since the brake handle 310 has a relatively large diameter, this invention designs the minimum outer diameter of the brake pad 305 to be larger than the outer diameter of the waterproof bearing 302, ensuring that the connecting cover 4 and the housing 5 can be installed sequentially. This allows the electromagnetic brake device 3 to be fitted onto the shaft first, and the brake signal line 309 can be exposed on the outside of the circuit board 8 for easy soldering. By integrating the electromagnetic brake into the hub motor and optimizing issues such as waterproofing and installation difficulties, the braking function of this motor is made safer and more reliable, enabling its application in a wider range of scenarios.

[0029] To ensure a high level of waterproofing after assembly of the electromagnetic brake device 3, this invention incorporates a sealing ring 306 to guarantee the waterproofing level between the base 301 and the shaft 2. An inner O-ring 307 is designed between the base 301 and the waterproof bearing 302, and an outer O-ring 308 is designed between the waterproof bearing 302 and the housing 5. Furthermore, the waterproof bearing 302 is designed to waterproof specifications, thus ensuring the waterproofing level between the base 301 and the housing 5, and guaranteeing the overall waterproofing level of the motor. This effectively improves the reliability and safety of the motor.

[0030] When the motor is working, the waterproof line 1 transmits signals and electrical energy. The motor body 6 converts the electrical energy into the kinetic energy of the motor rotor. The kinetic energy of the motor rotor is transmitted to the housing 5 through the planetary reduction gear 7, which can achieve the effect of speed reduction and torque increase, and meet more working scenarios.

[0031] The working principle of this utility model is to add an electromagnetic brake device (3) to the deceleration hub motor, so that the hub motor has a braking function. The inner diameter of the base 301 is fixed to the shaft 2, and the outer diameter is connected to the housing 5 through the waterproof bearing 302. The stationary plate 304 is fixed to the base 301, and the moving plate 303 is also connected to the base 301 and can only move axially. The brake pad 305 is installed between the stationary plate 304 and the moving plate 303 with a certain gap. The brake pad is also connected to the motor rotor 601 through the connecting cover 4. In the non-working state, the moving plate 303 is attracted and stuck together by the magnetic field inside the base 301, and the brake pad 305 can rotate between the stationary plate 304 and the moving plate 303. In the working state, the electromagnetic field inside the base 301 disappears, the moving plate 303 is pushed out by the spring, and the brake pad is clamped between the stationary plate 304 and the moving plate 303, reaching a certain frictional torque. The connected motor rotor 601 will also reach this frictional torque. This frictional torque will be transmitted to the housing 5 through the planetary reduction gear 7, and this frictional torque will amplify the reduction ratio of the planetary reduction gear 7 to achieve a good braking effect.

[0032] To facilitate the assembly of the electromagnetic brake device 3, the waterproof bearing 302 is pre-installed on the base 301, allowing the electromagnetic brake device 3 to be easily inserted when installing the connecting cover 4 and the housing 5. Since the brake handle 310 has a relatively large diameter, the minimum outer diameter of the brake pad 305 is designed to be larger than the outer diameter of the waterproof bearing 302, ensuring that the connecting cover 4 and the housing 5 can be installed sequentially. This allows the electromagnetic brake device 3 to be fitted onto the shaft first, and the brake signal line 309 can be exposed on the outside of the circuit board 8 for easy soldering.

[0033] To ensure a high level of waterproofing after assembly of the electromagnetic brake device 3, this invention incorporates a sealing ring 306 to guarantee the waterproofing level between the base 301 and the shaft 2. An inner O-ring 307 is designed between the base 301 and the waterproof bearing 302, and an outer O-ring 308 is designed between the waterproof bearing 302 and the housing 5. Furthermore, the waterproof bearing 302 is designed to waterproof specifications, thus ensuring the waterproofing level between the base 301 and the housing 5, and guaranteeing the overall waterproofing level of the motor. This effectively improves the reliability and safety of the motor.

[0034] This utility model provides a hub motor with electromagnetic brake, which can be applied to various vehicles, such as wheelchairs and golf carts.

[0035] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application 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. Therefore, they should not be construed as limitations on this application.

[0036] The specific embodiments of this utility model have been described above. It should be understood that this utility model is not limited to the specific embodiments described above, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the substantive content of this utility model. Unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.

Claims

1. A hub motor with electromagnetic brake, characterized in that, include: Shaft (2), electromagnetic brake device (3), connecting cover (4), hub housing (5) and motor body (6); The motor body (6) and the electromagnetic brake device (3) are mounted on the shaft (2), and one end of the shaft (2) is connected to one side of the hub housing (5) through a bearing; The electromagnetic braking device (3) includes: a base (301), a waterproof bearing (302), a moving plate (303), a stationary plate (304), a brake pad (305), a sealing ring (306), an inner O-ring (307), and an outer O-ring (308). The inner diameter of the base (301) is connected to the shaft (2), and the outer diameter is connected to the other side of the hub housing (5) through the waterproof bearing (302). The stationary plate (304) and the moving plate (303) are respectively connected to the base (301). The brake pad (305) is located between the stationary plate (304) and the moving plate (303) and has a certain gap. The brake pad (305) is connected to the rotor of the motor body (6) through the connecting cover (4). The sealing ring (306) is connected between the shaft (2) and the inner diameter of the base (301). The inner O-ring (307) is connected between the outer diameter of the base (301) and the inner diameter of the waterproof bearing (302). The outer O-ring (308) is connected between the outer diameter of the waterproof bearing (302) and the hub housing (5).

2. The hub motor with electromagnetic brake according to claim 1, characterized in that, The hub motor with electromagnetic brake also includes a rubber block (9), which is interference-fitted into the gap between the brake pad (305) and the rotor.

3. The hub motor with electromagnetic brake according to claim 1, characterized in that, The hub motor with electromagnetic brake also includes a waterproof line (1) and a circuit board (8). The circuit board (8) is electrically connected to the stator of the motor body (6), and the waterproof line (1) is electrically connected to the circuit board (8).

4. The hub motor with electromagnetic brake according to claim 3, characterized in that, The electromagnetic braking device (3) also includes a brake signal line (309), which is electrically connected to the circuit board (8).

5. The hub motor with electromagnetic brake according to claim 3, characterized in that, The shaft (2) has an outlet channel, through which the waterproof line (1) passes and connects to external equipment.

6. The hub motor with electromagnetic brake according to claim 1, characterized in that, The minimum outer diameter of the brake pad (305) is greater than the outer diameter of the waterproof bearing (302).

7. The hub motor with electromagnetic brake according to claim 1, characterized in that, The hub motor with electromagnetic brake also includes a planetary reduction gear (7), the inner diameter of which is connected to the shaft (2), and the rotor of the motor body (6) drives the hub housing (5) to rotate through the planetary reduction gear (7).

8. The hub motor with electromagnetic brake according to claim 7, characterized in that, The planetary reduction gear (7) is located on the side of the motor body (6) away from the electromagnetic brake device (3).

9. The hub motor with electromagnetic brake according to claim 4, characterized in that, The brake signal line (309) is exposed on the outside of the circuit board (8).

10. A vehicle, characterized in that, Including the hub motor with electromagnetic brake as described in any one of claims 1-9.

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