Structure of axial flux motor encoder

Abstract

A structure of an axial magnetic flux motor encoder comprises an encoder module, the encoder module comprises a code disc and a sensor, the sensor is fixed on an electromagnetic brake of an axial magnetic flux motor, and the code disc is fixed on a motor rotor of the axial magnetic flux motor opposite to the sensor. According to the structure of the axial magnetic flux motor encoder, the encoder module is arranged in the axial magnetic flux motor, the integration level is high, the installation is convenient, and the occupied space is small; signal feedback can be directly acquired, and the precision is high. In addition, the motor rotor of the axial flux motor encoder becomes a part of an electromagnetic brake, so that the axial flux motor encoder has more functions, and the structure is more simplified.

Description

Technical Field

[0001] This utility model relates to the field of axial flux motors, and more particularly to axial flux motor encoders. Background Technology

[0002] Existing axial flux motors have advantages such as compact structure, high precision, and high torque density, and are used in devices such as robot joints that require high transmission precision.

[0003] The output speed of existing axial flux motors is usually fed back through an externally installed encoder module, but its structure is complex, inconvenient to install, takes up a lot of space, and the motor speed cannot be fed back in a timely manner. Summary of the Invention

[0004] The technical problem to be solved by this utility model is to overcome the above-mentioned defects of the prior art and provide an axial flux motor encoder that is easy to install.

[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows:

[0006] An axial flux motor encoder structure includes an encoder module, the encoder module including a code disk and a sensor, the sensor being fixed on the electromagnetic brake of the axial flux motor, and the code disk being fixed on the motor rotor of the axial flux motor opposite the sensor.

[0007] More preferably, the axial flux motor includes an electromagnetic brake and a motor rotor, which are coaxially arranged. The electromagnetic brake includes a brake stator, a coil, a spring, and an armature. The coil and spring are disposed in the brake stator. The armature is sleeved on the shaft and pushed by the spring to press against the brake pad. The motor rotor includes a rotor, and the brake pad is installed on the side of the rotor closest to the armature. The sensor is fixed on the armature, and the code disk is fixed on the rotor. When the coil is energized, it generates a magnetic field. The armature is attracted by the magnetic field, causing it to compress the spring. The armature and the brake pad separate axially, and the motor rotor rotates normally. At this time, the encoder module detects the rotor normally. When the coil is de-energized, the armature loses the magnetic field attraction, the spring returns to its original position, and pushes the armature to axially engage with the brake pad, thereby stopping the rotor from rotating due to friction.

[0008] Even better, the brake stator is provided with a spring mounting hole, and the spring is placed in the spring mounting hole.

[0009] Compared with the prior art, the advantages of this utility model are as follows: The structure of the axial flux motor encoder of this utility model is such that the encoder module is set inside the axial flux motor, which has high integration, is easy to install, and occupies little space; it can also directly collect signal feedback with high accuracy.

[0010] Furthermore, since the motor rotor of the axial flux motor encoder becomes part of the electromagnetic brake, it has more functions and a simpler structure. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of the axial flux motor encoder according to an embodiment of the present invention.

[0012] Figure 2 This is a schematic diagram of the electromagnetic brake in the axial flux motor of this utility model embodiment.

[0013] Figure 3 This is a schematic diagram of the structure of the axial flux motor according to an embodiment of the present invention. Detailed Implementation

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0015] like Figure 1 , 2 As shown in Figures 1 and 3, an axial flux motor encoder structure includes an encoder module 40, which is disposed inside the axial flux motor.

[0016] The axial flux motor includes an electromagnetic brake 10, a motor rotor 30, and a motor stator 20.

[0017] The electromagnetic brake 10, motor rotor 30, and motor stator 20 are coaxially arranged. The motor stator 20 and motor rotor 30 form a common axial flux motor, and the motor rotor 30 and brake 10 form an electromagnetic brake.

[0018] The electromagnetic brake 10 includes a brake stator 11, a coil 14, a spring 15, and an armature 12. The coil 14 and the spring 15 are disposed in the brake stator 11. The armature 12 is sleeved on the shaft and is pushed by the spring 15 to press against the brake pad 203 described below.

[0019] The brake stator 11 is provided with a spring mounting hole 17, and the spring 15 is placed in the spring mounting hole 17 to better limit the spring 15.

[0020] The motor rotor 30 includes a rotor 32, on which permanent magnets 204 are evenly distributed near the motor stator 20, and brake pads 203 are installed on the other side near the armature 12.

[0021] The encoder module 40 includes a code disk 31 and a sensor 13. The encoder module 40 can provide feedback signals to detect the speed and angle of the axial flux motor.

[0022] The code disk 31 is a ring-shaped magnetic ring, which is a magnetized component, and the magnetic code track is a single track or multiple tracks.

[0023] The code disk 31 is fixed by adhesive and the rotor 32 near the armature 12.

[0024] The sensor 13 is fixed on the armature 12 and is opposite to the code disk 31.

[0025] When the coil 14 in the brake stator 10 is energized, it generates a magnetic field. The armature 12 is attracted by the magnetic field, causing it to compress the spring 15. The armature 12 separates axially from the brake pad 203, and the motor rotor 32 can rotate normally. At this time, the encoder module 40 can detect the rotor normally, thereby detecting the speed and angle of the axial flux motor.

[0026] When the coil 14 in the brake stator 10 loses power and loses its magnetic field, the armature 12 loses its magnetic attraction, and the compressed spring 15 will return to its original position, pushing the armature 12 to axially engage with the brake pad 203, thereby causing the rotor 32 of the axial flux motor to stop rotating due to friction.

Claims

1. A structure for an axial flux motor encoder, characterized in that: The device includes an encoder module, which includes a code disk and a sensor. The sensor is fixed on the electromagnetic brake of the axial flux motor, and the code disk is fixed on the motor rotor of the axial flux motor opposite the sensor.

2. The structure of the axial flux motor encoder according to claim 1, characterized in that: The axial flux motor includes an electromagnetic brake and a motor rotor, which are coaxially arranged. The electromagnetic brake includes a brake stator, a coil, a spring, and an armature. The coil and spring are installed in the brake stator. The armature is sleeved on the shaft and pushed by the spring to press against the brake pad. The motor rotor includes a rotor, and the brake pad is installed on the side of the rotor closest to the armature. The sensor is fixed on the armature, and the code disk is fixed on the rotor. When the coil is energized, it generates a magnetic field. The armature is attracted by the magnetic field, causing it to compress the spring. The armature and brake pad separate axially, and the motor rotor rotates normally. At this time, the encoder module detects the rotor normally. When the coil is de-energized, the armature loses the magnetic field attraction, the spring returns to its original position, and pushes the armature to axially engage with the brake pad, thereby stopping the rotor from rotating due to friction.

3. The structure of the axial flux motor encoder according to claim 2, characterized in that: The brake stator is provided with a spring mounting hole, and the spring is placed in the spring mounting hole.

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