Shaftless hollow brushless motor

Abstract

The application provides an axle-free hollow brushless motor, and relates to the field of laser radars and electric laser heads. The axle-free hollow brushless motor comprises a steel ring, the top of the steel ring is provided with an integrated cover, the bottom of the steel ring is provided with a driving base, one side of the driving base is provided with a lower cover, and the inner side of the lower cover is provided with a second bearing. The axle-free hollow brushless motor is characterized in that the integrated cover structure is provided with a large hole, the laser lens or the prism can be matched with the motor rotor to rotate, the utilization efficiency of the motor is greatly improved, the integrated cover and the stator fixing seat are arranged, the laser emission part of the radar is perfectly isolated from the stator fixing seat through the integrated cover, dust can be prevented from entering the inside of the laser lens, other laser dust prevention devices are saved, the overall space of the radar is saved, the motor fixing seat is arranged, the whole motor adopts the axle-free hollow design, the traditional motor rotating shaft is replaced by the motor fixing seat, the internal space is large, and a larger laser emission system can be carried.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of laser radar and electric laser head, in particular to a shaftless hollow brushless motor. BACKGROUND

[0002] The brushless DC motor is composed of a motor body and a driver, and is a typical mechatronic product. Since the brushless DC motor operates in a self-control mode, it does not require additional starting windings on the rotor like synchronous motors under heavy load starting with frequency conversion, and it also does not produce oscillation and out-of-step when the load suddenly changes. The permanent magnet of small and medium capacity brushless DC motor is now mostly made of high magnetic energy level rare earth neodymium iron boron (Nd-Fe-B) material. Therefore, the volume of the rare earth permanent magnet brushless motor is reduced by one frame size compared with the same capacity three-phase asynchronous motor.

[0003] At present, the laser radar motor generally includes a shell, a permanent magnet, an iron core winding, a shaft, and a bearing, which has large volume, low space utilization, and low efficiency. SUMMARY

[0004] (I) Technical problems solved

[0005] In view of the deficiencies of the prior art, the present application provides a shaftless hollow brushless motor to solve the problems mentioned in the background.

[0006] (II) Technical solutions

[0007] To achieve the above purpose, the present application is implemented by the following technical solutions: a shaftless hollow brushless motor, comprising a steel ring, a one-piece cover is arranged on the top of the steel ring, a drive base is arranged at the bottom of the steel ring, a lower cover is mounted on one side of the drive base, a second bearing is mounted on the inner side of the lower cover, a stator fixing seat is mounted on one side of the drive base, a stator core is sleeved on the outer side of the stator fixing seat, a fixed ring seat is arranged on the outer side of the stator fixing seat, a magnetic ring is sleeved on the inner side of the steel ring, and a first bearing is arranged between the magnetic ring and the one-piece cover.

[0008] Preferably, the magnetic ring, the second bearing, the magnetic ring, and the first bearing are arranged on the inner side of the steel ring.

[0009] Preferably, the inner side of the stator core is provided with a stator fixing seat and connected with the fixed ring seat, and the stator fixing seat, the stator core, the fixed ring seat, and the drive base constitute a stator assembly.

[0010] Preferably, the magnetic ring is arranged between the first bearing and the second bearing, and the lower cover, the first bearing, the magnetic ring, the steel ring, the first bearing, and the one-piece cover constitute a rotor assembly.

[0011] Preferably, the lower cover and the second bearing are arranged between the driving base and the stator fixing seat, and the inner side of the integrated upper cover is provided with the first bearing.

[0012] (III) Beneficial effects

[0013] The application provides a shaftless hollow brushless motor.

[0014] 1. The shaftless hollow brushless motor, through the large hole of the integrated upper cover structure, can be matched with a laser lens or a prism to rotate with the motor rotor, greatly improving the utilization efficiency of the motor, and the bearing play is eliminated by the anaerobic glue pre-tightening method during the assembly of the stator and the rotor, so that the motor is silent and has no jitter during operation, and the laser emission system is more stable.

[0015] 2. The shaftless hollow brushless motor, through the arrangement of the integrated upper cover and the stator fixing seat, the radar laser emission part is perfectly isolated by the integrated upper cover and the stator fixing seat, dust can be prevented from entering the inside of the laser lens, other laser dust prevention is saved, and the overall space of the radar is saved.

[0016] 3. The shaftless hollow brushless motor, through the arrangement of the motor fixing seat, the whole motor adopts a shaftless hollow design, and a new brushless design concept is adopted, that is, the motor fixing seat is used instead of the traditional motor rotating shaft, so that the internal space is large, and a larger laser emission system can be carried. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a complete structure schematic view of the application;

[0018] Figure 2 is an explosion view of the application Figure 1 ;

[0019] Figure 3 is a stator assembly perspective view of the application;

[0020] Figure 4 is an explosion view of the stator assembly of the application;

[0021] Figure 5 is a cross-sectional view of the stator assembly of the application;

[0022] Figure 6 is a rotor assembly perspective view of the application;

[0023] Figure 7 is an explosion view of the rotor assembly of the application;

[0024] Figure 8 is a cross-sectional view of the rotor assembly of the application.

[0025] In the diagram: 1. Stator mounting base, 2. Stator core, 3. Fixing ring seat, 4. Drive base, 5. Steel ring, 6. Magnetic ring, 7. Lower cover, 8. First bearing, 9. Second bearing, 10. Integrated upper cover. Detailed Implementation

[0026] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0027] This invention provides a shaftless hollow brushless motor, such as... Figures 1-8 As shown, the device includes a steel ring 5, an integrated top cover 10 on the top of the steel ring 5, a drive base 4 at the bottom of the steel ring 5, a lower cover 7 installed on one side of the drive base 4, a second bearing 9 installed on the inner side of the lower cover 7, a stator fixing seat 1 installed on one side of the drive base 4, a stator core 2 sleeved on the outer side of the stator fixing seat 1, a fixing ring seat 3 on the outer side of the stator fixing seat 1, a magnetic ring 6 sleeved on the inner side of the steel ring 5, and a first bearing 8 between the magnetic ring 6 and the integrated top cover 10.

[0028] In this embodiment, a three-phase brushless motor structure is adopted, consisting of a motor steel ring 5, a magnetic ring 6, an integrated upper cover 10, a lower cover 7, a first bearing 8, and a second bearing 9 forming a shaftless rotor structure. The large central hole in the integrated upper cover 10 allows a laser lens or prism to rotate with the motor rotor, significantly improving motor efficiency. The stator core 2, stator fixing seat 1, drive base 4, and fixing ring seat 3 form a hollow stator. The integrated upper cover 10 and stator fixing seat 1 perfectly isolate the radar laser emitting part from the stator fixing seat 1. The design prevents dust from entering the laser lens, saving space for other laser dust prevention and overall radar space. The stator and rotor assembly eliminates the clearance of the first bearing 8 and the second bearing 9 through anaerobic adhesive pre-tightening, making the motor run quietly and without surging. This makes it more stable when paired with the laser emission system. The whole structure is annularly hollow with a sealed interior. The laser lens can be installed in the hollow part of the rotor, and the laser emission system can be installed in the hollow part of the stator. The whole motor adopts a shaftless hollow design, replacing the traditional motor shaft with a motor mounting base, which realizes a large internal space and can accommodate a larger laser emission system.

[0029] Specifically, a stator fixing seat 1, a stator core 2, a fixing ring seat 3, and a first bearing 8 are provided between the integrated upper cover 10 and the second bearing 9. The lower cover 7, the second bearing 9, the magnetic ring 6, and the first bearing 8 are all located inside the steel ring 5. By setting the magnetic ring 6 and the steel ring 5, as well as the first bearing 8, and the integrated upper cover 10 and the lower cover 7, the new brushless design concept replaces the traditional motor shaft with a motor fixing seat, resulting in high space utilization and high efficiency.

[0030] Specifically, the inner side of the stator core 2 is provided with a stator fixing seat 1 and is connected with a fixing ring seat 3, the stator fixing seat 1, the stator core 2, the fixing ring seat 3 and the driving base 4 constitute a stator assembly, through the cooperation of the stator core 2 and the stator fixing seat 1 and the fixing ring seat 3 and the driving base 4, through the setting of the motor fixing seat, the whole motor adopts a shaftless hollow design, the traditional motor rotating shaft is replaced by the motor fixing seat, the internal space is large, and a larger laser emission system can be carried.

[0031] Specifically, the magnetic ring 6 is arranged between the first bearing 8 and the second bearing 9, the lower cover 7, the first bearing 8, the magnetic ring 6, the steel ring 5, the second bearing 9 and the integrated upper cover 10 constitute a rotor assembly, through the cooperation of the magnetic ring 6 and the lower cover 7 and the first bearing 8 and the second bearing 9 and the steel ring 5, through the setting of the integrated upper cover 10 and the stator fixing seat 1, the radar laser emission part is perfectly isolated from the stator fixing seat 1 through the integrated upper cover 10, dust entering the inside of the laser lens can be prevented, other laser dust prevention is saved, and the overall space of the radar is saved.

[0032] Specifically, the lower cover 7 and the second bearing 9 are arranged between the driving base 4 and the stator fixing seat 1, the inner side of the integrated upper cover 10 is provided with the first bearing 8, through the cooperation of the lower cover 7 and the first bearing 8 and the second bearing 9 and the integrated upper cover 10, the whole mechanism constitutes a ring-shaped hollow, the inside of the ring is sealed, the hollow part of the rotor can be installed with a laser lens, and the hollow position of the stator can be installed with a laser emission system.

[0033] Working principle: when in use, the stator and rotor assembly eliminates the play of the first bearing 8 and the second bearing 9 through the anaerobic glue pre-tightening mode, so that the motor is silent and has no jitter when running, the laser emission system is more stable, the whole mechanism constitutes a ring-shaped hollow, the inside of the ring is sealed, the hollow part of the rotor can be installed with a laser lens, and the hollow position of the stator can be installed with a laser emission system, through the large middle hole of the integrated upper cover 10, the laser lens or the prism can be matched with the motor rotor to rotate together, through the setting of the integrated upper cover 10 and the stator fixing seat 1, the radar laser emission part is perfectly isolated from the stator fixing seat 1 through the integrated upper cover 10, dust entering the inside of the laser lens can be prevented, the whole motor adopts a shaftless hollow design, the traditional motor rotating shaft is replaced by the motor fixing seat, the internal space is large, and a larger laser emission system can be carried.

[0034] Although the embodiments of the present application have been shown and described, it should be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. An axleless hollow brushless electric motor comprising a steel ring (5), characterized in that: The top of the steel ring (5) is provided with an integral cover (10), the bottom of the steel ring (5) is provided with a drive base (4), one side of the drive base (4) is installed with a lower cover (7), the inner side of the lower cover (7) is installed with a second bearing (9), one side of the drive base (4) is installed with a stator fixing seat (1), the outer side of the stator fixing seat (1) is sleeved with a stator core (2), the outer side of the stator fixing seat (1) is provided with a fixed ring seat (3), the inner side of the steel ring (5) is sleeved with a magnetic ring (6), the magnetic ring (6) and the integral cover (10) are provided with a first bearing (8) therebetween; The integral cover (10) and the second bearing (9) are provided with the stator fixing seat (1), the stator core (2), the fixed ring seat (3) and the first bearing (8) therebetween, the lower cover (7), the second bearing (9), the magnetic ring (6) and the first bearing (8) are all arranged on the inner side of the steel ring (5); The inner side of the stator core (2) is provided with the stator fixing seat (1) and is connected with the fixed ring seat (3), the stator fixing seat (1), the stator core (2), the fixed ring seat (3) and the drive base (4) constitute a stator assembly; The magnetic ring (6) is arranged between the first bearing (8) and the second bearing (9), the lower cover (7), the first bearing (8), the magnetic ring (6), the steel ring (5), the second bearing (9) and the integral cover (10) constitute a rotor assembly; The lower cover (7) and the second bearing (9) are arranged between the drive base (4) and the stator fixing seat (1), the inner side of the integral cover (10) is provided with the first bearing (8).

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