Parking self-locking hub motor

Abstract

The utility model relates to a parking self-locking hub motor, which comprises a hub, a stator, a rotor, an electromagnetic lock and a motor shaft, the stator, the rotor, the electromagnetic lock and the motor shaft are positioned in the hub, the stator is fixedly sleeved on the motor shaft, the rotor is sleeved on the outer side of the stator, a hub cover is integrally formed on the side surface of the hub, the hub cover and the electromagnetic lock are sleeved on the motor shaft, and the electromagnetic lock is connected with the hub cover. The rotor drives the hub to rotate when powered on, the electromagnetic lock enables the hub cover and the hub to stop rotating when powered off, parking self-locking is completed, the motor shaft is further sleeved with a first bearing, the first bearing is located on the side face of the electromagnetic lock, and the outer surface of the first bearing is tightly attached to the inner circumferential face of the hub cover. According to the utility model, the electromagnetic lock is arranged to realize the automatic brake function of the wheel hub motor during power failure, so that the parking self-locking is realized, and the safety of the wheel hub motor during use is improved; the first bearing is directly arranged on the motor shaft in a sleeving mode, the bearing capacity is higher, meanwhile, interference and influence on the electromagnetic lock are avoided, and the service life and normal operation of the electromagnetic lock are guaranteed while rotation of the hub cover is guaranteed.

Description

Technical Field

[0001] This utility model relates to a parking self-locking hub motor, belonging to the field of hub motor technology. Background Technology

[0002] Current transport robots, as well as personal mobility devices such as scooters, balance bikes, and electric vehicles, are equipped with hub motors to drive the wheels. However, when the hub motor loses power unexpectedly, the vehicle is prone to slipping, resulting in problems such as low safety, limited application range, and poor practicality when using transport robots and personal mobility devices. Utility Model Content

[0003] The purpose of this invention is to address the shortcomings of existing technologies by providing a parking self-locking hub motor that automatically engages the brake when the motor is powered off.

[0004] To achieve this objective, the technical solution adopted by this utility model is:

[0005] A parking self-locking hub motor includes a hub and a stator, a rotor, an electromagnetic lock, and a motor shaft located within the hub. The stator is sleeved and fixed on the motor shaft, and the rotor is sleeved on the outside of the stator. A hub cover is integrally formed on the side of the hub. The hub cover and the electromagnetic lock are both sleeved on the motor shaft. The electromagnetic lock is connected to the hub cover. When energized, the rotor drives the hub to rotate. When de-energized, the electromagnetic lock stops the rotation of the hub cover and the hub, thus completing the parking self-locking. A first bearing is also sleeved on the motor shaft. The first bearing is located on the side of the electromagnetic lock, and the outer surface of the first bearing is in close contact with the inner circumferential surface of the hub cover.

[0006] As a further optimization of the above technical solution: the electromagnetic lock includes an electromagnet, a first friction plate, and a moving coil sequentially sleeved on the motor shaft. The electromagnet and the first friction plate are both fixed on the motor shaft. The moving coil is fixed on the hub cover and rotates synchronously with the wheel hub. The electromagnet has a de-energized state and an energized state. When the motor is energized and rotating, the electromagnet is in the energized state, and the magnetic force of the electromagnet attracts the first friction plate, causing the first friction plate to be spaced apart from the moving coil. When the motor is de-energized, the electromagnet is adjusted to the de-energized state, the magnetic force of the electromagnet disappears, and the first friction plate returns to abutting against the moving coil. The friction between the first friction plate and the moving coil forces the wheel hub to stop rotating.

[0007] As a further optimization of the above technical solution: an end cover is also installed on the side of the hub, the side of the end cover near the stator is the inner side, a mounting ring is formed in the middle of the inner side of the end cover, a number of reinforcing ribs are provided between the outer circumferential surface of the mounting ring and the inner side of the end cover, and a second bearing is also sleeved on the motor shaft, the outer circumferential surface of the second bearing is in close contact with the inner circumferential surface of the mounting ring.

[0008] As a further optimization of the above technical solution: the stator includes multiple stator teeth and a winding wound on the stator teeth. A slot wedge is provided between two adjacent stator teeth to fix the winding. An insulating plate is also provided on the stator teeth. The insulating plate is located between the winding and the stator teeth and provides insulation between the winding and the stator teeth.

[0009] As a further optimization of the above technical solution: the rotor includes a magnetic ring and a plurality of magnets located on the inner circumferential surface of the magnetic ring.

[0010] As a further optimization of the above technical solution: an installation groove is formed on the inner circumferential surface of the hub, and the magnetic ring is fixed in the installation groove.

[0011] As a further optimization of the above technical solution: the magnetic guide ring is integrally formed on the inner circumferential surface of the hub.

[0012] Compared with the prior art, this utility model achieves the function of automatic braking when the hub motor is powered off by setting an electromagnetic lock, realizing self-locking when parking and improving the safety of the hub motor during use; the first bearing is directly sleeved on the motor shaft, with stronger load-bearing capacity, and will not interfere with or affect the electromagnetic lock, ensuring the rotation of the hub cover while ensuring the service life and normal operation of the electromagnetic lock; the second bearing is set on the inner side of the end cover, making reasonable use of the space between the end cover and the stator, thereby reducing the axial dimension of the hub motor; a slot wedge is provided to fix the installation of the winding, and an insulating plate is also provided to insulate and isolate the winding and stator teeth. Attached Figure Description

[0013] Figure 1 This is a cross-sectional structural diagram of the present invention.

[0014] Figure 2 This is an exploded structural diagram of the present invention.

[0015] Figure 3 This is a three-dimensional structural diagram of the stator in this utility model. Detailed Implementation

[0016] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. For example... Figure 1-3As shown, a parking self-locking hub motor includes a hub 1 and a stator 2, a rotor 3, an electromagnetic lock 4, and a motor shaft 8 located within the hub 1. The stator 2 is fixedly mounted on the motor shaft 8, and the rotor 3 is mounted on the outside of the stator 2. A hub cover 11 is integrally formed on the side of the hub 1. Both the hub cover 11 and the electromagnetic lock 4 are mounted on the motor shaft 8. The electromagnetic lock 4 is connected to the hub cover 11. When energized, the rotor 3 drives the hub 1 to rotate. When de-energized, the electromagnetic lock 4 stops the hub cover 11 and the hub 1 from rotating, thus completing the parking self-locking. A first bearing 5 is also mounted on the motor shaft 8. The first bearing 5 is located on the side of the electromagnetic lock 4, and its outer surface is in close contact with the inner circumferential surface of the hub cover 11. The first bearing 5 allows the hub cover 11 and the hub 1 to be mounted on the motor shaft 8 and to rotate relative to the motor shaft 8. In existing technologies, bearings are typically directly mounted on the electromagnetic lock 4. The large inner diameter of the bearing results in poor load-bearing capacity, and the rotation of the motor housing causes the force borne by the bearing to be transmitted to the electromagnetic lock 4, making it prone to damage. In contrast, in this invention, the first bearing 5 is directly mounted on the motor shaft 8, providing stronger load-bearing capacity without interfering with or affecting the electromagnetic lock 4. This ensures the rotation of the hub cover 11 while guaranteeing the service life and normal operation of the electromagnetic lock 4.

[0017] In the above technical solution: the electromagnetic lock 4 includes an electromagnet 41, a first friction plate 43, and a moving coil 42, which are sequentially sleeved on the motor shaft 8. The electromagnet 41 and the first friction plate 43 are both fixed on the motor shaft 8, and the moving coil 42 is fixed on the hub cover 11 and rotates synchronously with the wheel hub 1. The electromagnet 41 has a de-energized state and an energized state. When the motor is energized and rotating, the electromagnet 41 is in the energized state, and the magnetic force of the electromagnet 41 attracts the first friction plate 43, so that the first friction plate 43 is spaced apart from the moving coil 42, thus not affecting the normal rotation of the wheel hub motor. When the motor is de-energized, the electromagnet 41 is adjusted to the de-energized state, the magnetic force of the electromagnet 41 disappears, and the first friction plate 43 returns to abutting against the moving coil 42. Thus, the friction between the first friction plate 43 and the moving coil 42 forces the wheel hub 1 to stop rotating, thereby helping to realize the function of automatic braking when the wheel hub motor is de-energized, realizing parking self-locking, and improving the safety of the wheel hub motor during use.

[0018] In the above technical solution: an end cover 6 is also installed on the side of the hub 1, and the side of the end cover 6 closest to the stator 2 is the inner side. A mounting ring 61 is formed in the middle of the inner side of the end cover 6, and several reinforcing ribs 62 are provided between the outer circumferential surface of the mounting ring 61 and the inner side of the end cover 6. A second bearing 7 is also fitted on the motor shaft 8, and the outer circumferential surface of the second bearing 7 is in close contact with the inner circumferential surface of the mounting ring 61. The second bearing 7 allows the end cover 6 to be fitted on the motor shaft 8 and rotate relative to the motor shaft 8. By placing the second bearing 7 on the inner side of the end cover 6, the space between the end cover 6 and the stator 2 is utilized effectively, thereby reducing the axial dimension of the hub motor.

[0019] In the above technical solutions: such as Figure 3As shown, the stator 2 includes multiple stator teeth 21 and windings 22 wound on the stator teeth 21. A slot wedge 23 is provided between two adjacent stator teeth 21 to fix the windings 22. An insulating plate 24 is also provided on the stator teeth 21. The insulating plate 24 is located between the windings 22 and the stator teeth 21 and provides insulation between the windings 22 and the stator teeth 21.

[0020] In the above technical solution: the rotor 3 includes a magnetic ring 31 and a plurality of magnets 32 located on the inner circumferential surface of the magnetic ring 31. A mounting groove is formed on the inner circumferential surface of the hub 1, and the magnetic ring 31 is fixed in the mounting groove; or the magnetic ring 31 is integrally formed on the inner circumferential surface of the hub 1.

[0021] The preferred embodiments of this utility model have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of this utility model without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of this utility model through logical analysis, reasoning, or limited experimentation on the basis of existing technology should fall within the protection scope of this utility model.

Claims

1. A parking self-locking wheel hub motor, characterized in that The application relates to a wheel hub (1) and a stator (2), a rotor (3), an electromagnetic lock (4) and a motor shaft (8) arranged in the wheel hub (1), the stator (2) is fixedly sleeved on the motor shaft (8), the rotor (3) is sleeved on the outer side of the stator (2), a hub cover (11) is integrally formed on the side of the wheel hub (1), the hub cover (11) and the electromagnetic lock (4) are both sleeved on the motor shaft (8), the electromagnetic lock (4) is connected with the hub cover (11), the rotor (3) drives the wheel hub (1) to rotate when electricity is supplied, the electromagnetic lock (4) stops the hub cover (11) and the wheel hub (1) from rotating when electricity is cut off, parking self-locking is completed, a first bearing (5) is further sleeved on the motor shaft (8), the first bearing (5) is located on the side of the electromagnetic lock (4), and the outer surface of the first bearing (5) is tightly attached to the inner circumferential surface of the hub cover (11).

2. A parking self-locking wheel hub motor according to claim 1, characterized in that The electromagnetic lock (4) comprises an electromagnet (41), a first friction plate (43) and a moving coil (42) which are sequentially sleeved on the motor shaft (8), the electromagnet (41) and the first friction plate (43) are both fixed on the motor shaft (8), the moving coil (42) is fixed on the hub cover (11) and synchronously rotates with the wheel hub (1), the electromagnet (41) has a power-off state and a power-on state, the electromagnet (41) is in the power-on state when the motor rotates with electricity supplied, the magnetic force of the electromagnet (41) attracts the first friction plate (43), so that the first friction plate (43) is spaced apart from the moving coil (42); when the motor is cut off, the electromagnet (41) is adjusted to the power-off state, the magnetic force of the electromagnet (41) disappears, the first friction plate (43) is reset to abut against the moving coil (42), and the wheel hub (1) is forced to stop rotating through the friction between the first friction plate (43) and the moving coil (42).

3. The self-parking hub motor of claim 1, wherein The side of the wheel hub (1) is further provided with an end cover (6), the side of the end cover (6) close to the stator (2) is an inner side, a mounting ring (61) is arranged in the middle of the inner side of the end cover (6), a plurality of reinforcing ribs (62) are arranged between the outer circumferential surface of the mounting ring (61) and the inner side of the end cover (6), a second bearing (7) is further sleeved on the motor shaft (8), and the outer circumferential surface of the second bearing (7) is tightly attached to the inner circumferential surface of the mounting ring (61).

4. The self-parking hub motor of claim 1, wherein The stator (2) comprises a plurality of stator teeth (21) and windings (22) wound on the stator teeth (21), a slot wedge (23) is arranged between adjacent two stator teeth (21) and used for fixing the windings (22), an insulating plate (24) is further arranged on the stator tooth (21) and used for insulating and isolating the windings (22) and the stator tooth (21).

5. The self-parking hub motor of claim 1, wherein The rotor (3) comprises a magnetic conducting ring (31) and a plurality of magnetic steels (32) arranged on the inner circumferential surface of the magnetic conducting ring (31).

6. A parking self-locking wheel hub motor according to claim 5, characterized in that The hub (1) is provided with a mounting groove on the inner circumferential surface, and the magnet conducting ring (31) is fixed in the mounting groove.

7. A parking self-locking wheel hub motor according to claim 5, characterized in that The magnet conducting ring (31) is integrally formed on the inner circumferential surface of the hub (1).

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