Magnetic encoder mechanism of hub motor

Abstract

The utility model relates to the technical field of hubs, in particular to a magnetic encoder mechanism of a hub motor, which comprises a hub, a first bearing, magnetic steel, a stator and an encoder. A first bearing is arranged in the middle of the inner side of the hub, the hub is sleeved with magnetic steel, a stator located above the first bearing is arranged on the inner side of the hub, and an encoder penetrates through the middle of the stator. When current passes through the coil in the stator, a magnetic field is generated, the magnetic field interacts with magnetic fields generated by the magnetic steel and the magnet, so that torque is generated to drive the hub to drive the tire to rotate, the encoder measures the rotation angle and speed of the hub, and the information is fed back to a control system of a vehicle. By means of the arrangement of an encoder mechanism, high-precision detection and calculation of parameters such as the vehicle speed, the accelerated speed and steering can be achieved, the high precision is crucial to the stability and safety of the vehicle, and more accurate and more reliable vehicle state information can be provided.

Description

Technical Field

[0001] This utility model relates to the field of wheel hub technology, and in particular to a magnetic encoder mechanism for a wheel hub motor. Background Technology

[0002] A hub motor is a device that installs a motor inside the wheel hub of a car to directly drive the wheel. Its working principle is based on electromagnetic induction, that is, electrical energy is directly converted into mechanical energy to drive the wheel. The hub motor contains a stator and a rotor. The stator consists of an iron core and windings, which generate a magnetic field when current flows through it. The rotor is mounted on the wheel hub and is usually composed of permanent magnets or windings. In the hub motor, the magnets are an important component of the rotor. Their main function is to generate a magnetic field and promote the operation of the motor. The magnets are usually made of rare earth permanent magnet materials, which are strong magnetic materials with characteristics such as high magnetic energy product, high coercivity, and high permeability. When current passes through the stator windings, it generates torque in the magnetic field, driving the rotor to rotate, and thus driving the wheel to rotate.

[0003] Existing hub motors are merely power sources for electrical appliances or various machines. They cannot precisely control the motor or achieve feedback control of the motor. They can only rely on estimation, which usually cannot match the actual position measurement, resulting in a decrease in position control accuracy. If the control system cannot obtain this key information, the accuracy of speed control cannot be guaranteed.

[0004] Therefore, since the existing hub motors cannot precisely control the motor or achieve feedback control, and can only rely on estimation, which leads to a decrease in position control accuracy and thus affects the accuracy of speed control, a hub motor magnetic encoder mechanism can be designed to improve control precision and accuracy. Utility Model Content

[0005] To overcome the problem that existing hub motors cannot precisely control the motor and achieve feedback control of the motor, and can only rely on estimation, which leads to a decrease in position control accuracy and thus affects the accuracy of speed control.

[0006] The technical solution of this utility model is as follows: a hub motor magnetic encoder mechanism, including a hub, a first bearing, a magnet, a stator and an encoder; the first bearing is provided in the middle of the inner side of the hub, the magnet is sleeved on the outside of the hub, the stator is provided on the inner side of the hub above the first bearing, the encoder is inserted through the middle of the stator, two sets of first fixing screws are transversely inserted through the end of the encoder away from the stator, a tire is sleeved on the outside of the magnet, the second bearing is provided in the middle of the side of the stator away from the first bearing, and the end of the encoder away from the stator is attracted and connected to the magnet.

[0007] Preferably, when current passes through the coil in the stator, a magnetic field is generated. This magnetic field interacts with the magnetic fields generated by the magnet and the steel, thereby generating torque, driving the wheel hub to rotate the tire. The encoder measures the rotation angle and speed of the wheel hub and feeds this information back to the vehicle's control system, thereby achieving more precise driving and braking.

[0008] Preferably, one end of the stator passes through the first bearing and the hub.

[0009] Preferably, the first fixing screw passes through the encoder and drives it to connect with the stator thread.

[0010] Preferably, one side of the wheel hub is provided with an end cap.

[0011] Preferably, a sleeve cap is positioned and connected in the middle of the end cap.

[0012] Preferably, multiple sets of second fixing screws are provided around the upper edge of the end cap.

[0013] Preferably, the second fixing screw passes through the end cap and drives it to be threadedly connected to the wheel hub.

[0014] The beneficial effects of this invention are as follows: When current passes through the coil in the stator, a magnetic field is generated. This magnetic field interacts with the magnetic fields generated by the magnet and the steel magnet, thereby generating torque, which drives the wheel hub to rotate the tire. The encoder measures the rotation angle and speed of the wheel hub and feeds this information back to the vehicle's control system, thereby achieving more precise driving and braking. By setting up an encoder mechanism, high-precision detection and calculation of parameters such as vehicle speed, acceleration, and steering can be achieved. This high precision is crucial for the stability and safety of the vehicle, especially in intelligent driving and autonomous driving systems, where it can provide more accurate and reliable vehicle status information. Attached Figure Description

[0015] Figure 1 The diagram shown is a schematic representation of the overall structure of the encoder mechanism of this utility model.

[0016] Figure 2 This is a schematic diagram of the overall structure of the encoder mechanism of this utility model from another angle;

[0017] Figure 3 The diagram shown is a schematic representation of the encoder structure of the encoder mechanism of this utility model.

[0018] Figure 4 The diagram shown is a schematic of the second fixing screw structure of the encoder mechanism of this utility model.

[0019] Explanation of reference numerals in the attached drawings: 1. Hub; 2. First bearing; 3. Magnet; 4. Stator; 5. Encoder; 6. First fixing screw; 7. Tire; 8. Second bearing; 9. End cap; 10. Magnet; 11. Cover; 12. Second fixing screw. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0021] Please see Figures 1-4 This utility model provides an embodiment: a hub motor magnetic encoder mechanism, including a hub 1, a first bearing 2, a magnet 3, a stator 4 and an encoder 5; the first bearing 2 is provided in the middle of the inner side of the hub 1, the magnet 3 is sleeved on the outside of the hub 1, the stator 4 is provided on the inner side of the hub 1 above the first bearing 2, the encoder 5 is inserted through the middle of the stator 4, two sets of first fixing screws 6 are inserted horizontally through the end of the encoder 5 away from the stator 4, the tire 7 is sleeved on the outside of the magnet 3, the second bearing 8 is provided in the middle of the side of the stator 4 away from the first bearing 2, and the end of the encoder 5 away from the stator 4 is attracted and connected to the magnet 10.

[0022] Please see Figure 2 In this embodiment, one end of the stator 4 passes through the first bearing 2 and the hub 1. The stator 4 is also placed inside the hub 1 and above the first bearing 2. At the same time, one end of the stator 4 passes through the first bearing 2 and the hub 1. The first fixing screw 6 passes through the encoder 5 and drives it to be threadedly connected to the stator 4. The encoder 5 is inserted into the stator 4. The first fixing screw 6 passes through the encoder 5 and drives it to be threadedly connected to the stator 4. One side of the hub 1 is provided with an end cover 9. The end cover 9 is attached to one side of the hub 1 to seal the stator 4 and other parts in the hub 1.

[0023] Please see Figures 3-4 In this embodiment, a sleeve cover 11 is positioned and connected to the middle of the end cover 9. The sleeve cover 11 is positioned and connected to the middle of the end cover 9. Multiple sets of second fixing screws 12 are arranged around the upper edge of the end cover 9. The second fixing screws 12 are used to strengthen the connection between the end cover 9 and the wheel hub 1. The second fixing screws 12 pass through the end cover 9 and drive it to be threadedly connected to the wheel hub 1.

[0024] During operation, the first bearing 2 is placed inside the hub 1. Then, the stator 4 is placed inside the hub 1 and above the first bearing 2. One end of the stator 4 passes through the first bearing 2 and the hub 1. Then, the encoder 5 is inserted into the stator 4. The first fixing screw 6 passes through the encoder 5 and drives it to be threadedly connected to the stator 4. Next, the second bearing 8 is placed in the middle of the upper part of the stator 4. At the same time, the magnet 10 is attracted to the encoder 5. Then, the cover 11 is positioned and connected to the end cover 9 along the middle part. Finally, the end cover 9 is attached to one side of the hub 1 to seal the stator 4 and other parts in the hub 1. Then, the second fixing screw 12 passes through the end cover 9 and drives it to be threadedly connected to the hub 1.

[0025] Once all components are assembled, when current passes through the coil in stator 4, a magnetic field is generated. This magnetic field interacts with the magnetic fields generated by magnet 3 and magnet 10, thereby generating torque, which drives hub 1 to rotate tire 7. First bearing 2 and second bearing 8 play a role in reducing friction and wear during this process, ensuring the smooth rotation of hub 1. Encoder 5 measures the rotation angle and speed of hub 1 and feeds this information back to the vehicle's control system.

[0026] Through the above steps, when the current passes through the coil in the stator 4, a magnetic field is generated. This magnetic field interacts with the magnetic fields generated by the magnet 3 and the magnet 10, thereby generating torque, driving the wheel hub 1 to rotate the tire 7. The encoder 5 measures the rotation angle and speed of the wheel hub 1 and feeds this information back to the vehicle's control system, thereby achieving more precise driving and braking. By setting the encoder 5 mechanism, high-precision detection and calculation of parameters such as vehicle speed, acceleration, and steering can be achieved. This high precision is crucial for the stability and safety of the vehicle, especially in intelligent driving and autonomous driving systems. It can provide more accurate and reliable vehicle status information to solve the problem that the existing wheel hub 1 motor cannot accurately control the motor and achieve feedback control of the motor. It can only rely on estimation, which leads to a decrease in position control accuracy and thus affects the accuracy of speed control.

Claims

1. A hub motor magnetic encoder mechanism, comprising a hub (1); characterized in that: It also includes a first bearing (2), a magnet (3), a stator (4) and an encoder (5); the first bearing (2) is provided in the middle of the inner side of the hub (1), the magnet (3) is sleeved on the outside of the hub (1), the stator (4) is located above the first bearing (2) on the inner side of the hub (1), the encoder (5) is passed through the middle of the stator (4), two sets of first fixing screws (6) are passed through the end of the encoder (5) away from the stator (4) laterally, the tire (7) is sleeved on the outside of the magnet (3), the second bearing (8) is provided in the middle of the side of the stator (4) away from the first bearing (2), and the end of the encoder (5) away from the stator (4) is attracted and connected to the magnet (10).

2. The hub motor magnetic encoder mechanism according to claim 1, characterized in that: One end of the stator (4) passes through the first bearing (2) and the hub (1).

3. The hub motor magnetic encoder mechanism according to claim 1, characterized in that: The first fixing screw (6) passes through the encoder (5) and drives it to be threadedly connected to the stator (4).

4. The hub motor magnetic encoder mechanism according to claim 1, characterized in that: One side of the hub (1) is provided with an end cap (9).

5. The hub motor magnetic encoder mechanism according to claim 4, characterized in that: The end cap (9) is positioned and connected to a sleeve cap (11) in the middle.

6. The hub motor magnetic encoder mechanism according to claim 4, characterized in that: Multiple sets of second fixing screws (12) are inserted around the upper edge of the end cap (9).

7. The hub motor magnetic encoder mechanism according to claim 1, characterized in that: The second fixing screw (12) passes through the end cap (9) and drives it to be threadedly connected to the hub (1).

Images