Large-torque pulse brushless motor

Abstract

The utility model discloses a large torque pulse brushless motor, which comprises a shell 6, a stator, a rotor and a connecting piece, the stator is fixedly arranged in the shell 6, the rotor is rotatably arranged in the stator through the connecting piece, the rotor comprises a magnet 12, the connecting piece comprises a Hall sensor 14, the Hall sensor 14 and the magnet 12 are correspondingly arranged, and the Hall sensor 14 is fixedly arranged in the shell 6. The traditional mechanical commutation is replaced by electronic commutation. The motor is composed of a stator, a rotor and a position sensor, and the stator is a fixed part of the motor, is usually composed of a plurality of windings and is used for generating a rotating magnetic field; the rotor is a rotating part of the motor, is usually made of a permanent magnet material, and interacts with a magnetic field generated by the stator to generate torque, so that the motor rotates; the Hall sensor 14 is used for detecting the position of the rotor so as to control the electronic commutator to switch the current direction at the correct moment, and in addition, the Hall sensor 14 and the magnet 12 are independently added and are independently used for inducting induction pulses of the position of the rotor.

Description

TECHNICAL FIELD

[0001] The utility model relates to motor field, concretely relates to a big torque pulse brushless motor. BACKGROUND

[0002] With the continuous progress of science and technology and the expansion of application range, the market prospect of brushless motor is better and better. In the future, the application field of brushless motor will be more extensive. Brushless motor has the advantages of high efficiency, long service life, low maintenance, silent operation, fast response and precise control, wide speed regulation range and high power density, and is widely used in many fields. Its development prospect is very broad. Brushless motor is a kind of DC motor using electronic commutator instead of mechanical commutator and brush in traditional brush motor. This technology not only improves the efficiency of the motor, but also significantly reduces the maintenance cost, and provides a more quiet operating environment. These advantages of brushless motor make it widely used in many fields. At present, there are various brushless motors on the market. However, due to the complex structure of brushless DC motor, its cost is higher than that of brush DC motor. It needs to use a complex control circuit to control its operation, which increases its complexity. The overload capacity of brushless DC motor is relatively small, and it is difficult to sense that the motor rotates 360° per revolution to output a synchronous signal. At present, our company has developed a new type of brushless DC motor with strong torque output and zero angle signal output high-speed brushless motor. SUMMARY

[0003] The utility model aims at providing a big torque pulse brushless motor, and the specific technical scheme is as follows:

[0004] A big torque pulse brushless motor, comprising: a housing, a stator, a rotor and a connecting piece, the stator is fixedly arranged in the housing, the rotor is rotatably arranged in the stator through the connecting piece, the rotor comprises a magnet, the connecting piece comprises a hall sensor, the hall sensor and the magnet are correspondingly arranged, and the hall sensor is fixedly arranged in the housing.

[0005] The stator comprises a tubular winding, an annular front cover and an annular rear cover, the annular front cover and the annular rear cover are arranged at two ends of the tubular winding respectively, the annular rear cover is provided with a wire hole on the end face, and the power line of the tubular winding passes through the wire hole.

[0006] The rotor further comprises a shaft and a magnetic tile, the magnetic tile is arranged around the middle part of the shaft, the magnetic tile is located in the stator, and the magnet is arranged on the peripheral surface of the shaft close to one end of the magnetic tile.

[0007] The rotor further comprises a magnetic outer wall, and the magnetic outer wall wraps the magnetic tile.

[0008] The connecting piece further comprises a bearing and a sealing ring, the outer ring of the bearing is fixedly arranged in the housing through the sealing ring, and the inner ring of the bearing is fixed with the shaft.

[0009] The bearing and the sealing ring are arranged in two groups and are arranged at two ends of the rotating shaft respectively.

[0010] The connecting piece further comprises a flat washer, a wave washer and a snap spring, the flat washer and the wave washer are arranged on the outer ring of the sealing ring respectively, and the snap spring is used for fixing the flat washer and the wave washer.

[0011] The utility model further comprises a ring-shaped tail cover, the ring-shaped tail cover is fixedly arranged at one end of the shell, the inner ring diameter of the ring-shaped tail cover is greater than the rotating shaft, and a wire hole is arranged around the inner ring of the ring-shaped tail cover, the wire hole is used for connecting the power supply wire of the tubular winding and the power supply wire of the Hall sensor.

[0012] The above technical scheme of the utility model has the following beneficial technical effects: by arranging a separate magnet on the rotor, an inductive pulse for inducting the position of the rotor is provided, so that the signal interference is smaller and the Hall sensor is more sensitive during inducting, and zero-angle signal output is realized. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 is the schematic diagram of the explosion structure of the utility model;

[0014] Figure 2 is the schematic diagram of the structure of the utility model after assembly;

[0015] Wherein: 1 - snap spring, 2 - wave washer, 3 - flat washer, 4 - bearing, 5 - sealing ring, 6 - shell, 7 - ring-shaped front cover, 8 - tubular winding, 9 - ring-shaped rear cover, 10 - rotating shaft, 11 - magnetic shoe, 12 - magnet, 13 - magnetic outer wall, 14 - Hall sensor, 15 - ring-shaped tail cover, 16 - power supply wire of the tubular winding, 17 - power supply wire of the Hall sensor. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical scheme and advantages of the utility model more clear and obvious, the utility model is further described in detail below in combination with specific implementation manners and with reference to the drawings. It should be understood that these descriptions are only exemplary, and are not intended to limit the scope of the utility model. In addition, in the following description, the description of the known structure and technology is omitted to avoid unnecessary confusion of the concept of the present application.

[0017] The application discloses a large-torque pulse brushless motor, which comprises a shell 6, a stator, a rotor and a connecting piece, the stator is fixedly arranged in the shell 6, the rotor is rotatably arranged in the stator through the connecting piece, the rotor comprises a magnet 12, the connecting piece comprises a Hall sensor 14, the Hall sensor 14 and the magnet 12 are correspondingly arranged, and the Hall sensor 14 is fixedly arranged in the shell 6. The electronic commutation is used to replace the traditional mechanical commutation. The stator, the rotor and the position sensor are used to form a whole, the stator is a fixed part of the motor, is usually composed of a plurality of windings and is used for generating a rotating magnetic field; the rotor is a rotating part of the motor, is usually made of a permanent magnet material, interacts with the magnetic field generated by the stator to generate a torque and makes the motor rotate; the Hall sensor 14 is used for detecting the position of the rotor so as to control the electronic commutator to switch the current direction at a correct time, and in addition, a Hall sensor 14 and a magnet 12 are separately arranged and are used for sensing an induction pulse of the rotor position. The separate magnet 12 arranged on the rotor provides the induction pulse of the rotor position, the Hall sensor 14 is more sensitive when sensing the signal and the signal interference is smaller, and zero-angle signal output is realized.

[0018] The stator comprises a tubular winding 8, a ring-shaped front cover 7 and a ring-shaped rear cover 9, the ring-shaped front cover 7 and the ring-shaped rear cover 9 are arranged at two ends of the tubular winding 8 respectively, the ring-shaped rear cover 9 is provided with a wiring hole in an end face, and the power line 16 of the tubular winding 8 passes through the wiring hole. The rotor further comprises a rotating shaft 10 and magnetic tiles 11, the magnetic tiles 11 are arranged around the middle part of the rotating shaft 10, the magnetic tiles 11 are located in the stator, and the magnet 12 is arranged on the circumferential surface of one end of the rotating shaft 10 close to the magnetic tiles 11. The rotor further comprises a magnetic outer wall 13, and the magnetic outer wall 13 wraps the magnetic tiles 11. The connecting piece further comprises a bearing 4 and a sealing ring 5, the outer ring of the bearing 4 is fixedly arranged in the shell 6 through the sealing ring 5, and the inner ring of the bearing 4 is fixed with the rotating shaft 10. The bearing 4 and the sealing ring 5 are arranged in two groups and are arranged at two ends of the rotating shaft 10 respectively. The connecting piece further comprises a flat washer 3, a wave washer 2 and a circlip 1, the flat washer 3 and the wave washer 2 are arranged at the outer ring of the sealing ring 5 respectively, and the circlip 1 fixes the flat washer 3 and the wave washer 2. The application further comprises a ring-shaped tail cover 15, the ring-shaped tail cover 15 is fixedly arranged at one end of the shell 6, the inner ring of the ring-shaped tail cover 15 has a diameter larger than that of the rotating shaft 10, the inner ring of the ring-shaped tail cover 15 is provided with a wire outlet hole around, and the wire outlet hole is used for connecting the power line 16 of the tubular winding 8 and the power line 17 of the Hall sensor.

Claims

1. A large torque pulse brushless motor characterized by, It includes: The shell (6), the stator, the rotor and the connecting piece, the stator is fixedly arranged in the shell (6), the rotor is rotatably arranged in the stator through the connecting piece, the rotor includes the magnet (12), the connecting piece includes the hall sensor (14), the hall sensor (14) and the magnet (12) are correspondingly arranged, and the hall sensor (14) is fixedly arranged in the shell (6).

2. The large torque pulse brushless motor of claim 1, wherein, The stator includes a tubular winding (8), an annular front cover (7), an annular rear cover (9) and a power line (16) of the tubular winding, the annular front cover (7) and the annular rear cover (9) are arranged at both ends of the tubular winding (8) respectively, the annular rear cover (9) is provided with a wiring hole on the end face, and the power line (16) of the tubular winding passes through the wiring hole.

3. The large torque pulse brushless motor of claim 2, wherein, The rotor further includes a rotating shaft (10) and a magnetic tile (11), the magnetic tile (11) is arranged around the middle part of the rotating shaft (10), the magnetic tile (11) is located in the stator, and the magnet (12) is arranged on the peripheral surface of the rotating shaft (10) close to one end of the magnetic tile (11).

4. The large torque pulse brushless motor of claim 3, wherein, The rotor further includes a magnetic outer wall (13), and the magnetic outer wall (13) wraps the magnetic tile (11).

5. The large torque pulse brushless motor of claim 3, wherein, The connecting piece further includes a bearing (4) and a sealing ring (5), the outer ring of the bearing (4) is fixedly arranged in the shell (6) through the sealing ring (5), and the inner ring of the bearing (4) is fixed with the rotating shaft (10).

6. The large torque pulse brushless motor of claim 5, wherein, The bearing (4) and the sealing ring (5) are arranged in two groups and are arranged at both ends of the rotating shaft (10) respectively.

7. The large torque pulse brushless motor of claim 5, wherein, The connecting piece further includes a flat washer (3), a wave washer (2) and a circlip (1), the flat washer (3) and the wave washer (2) are arranged at the outer ring of the sealing ring (5) respectively, and the circlip (1) fixes the flat washer (3) and the wave washer (2).

8. The large torque pulse brushless motor of claim 6, wherein, It further includes an annular tail cover (15) and a power line (17) of the hall sensor, the annular tail cover (15) is fixedly arranged at one end of the shell (6), the inner ring diameter of the annular tail cover (15) is greater than that of the rotating shaft (10), the inner ring of the annular tail cover (15) is provided with a wire outlet hole around, and the wire outlet hole is used for connecting out the power line (16) of the tubular winding and the power line (17) of the hall sensor.

Images