Vehicle-mounted laser radar brushless motor

Abstract

The invention relates to the technical field of laser radars, in particular to a vehicle-mounted laser radar brushless motor which comprises a motor body, the motor body is provided with a base, the base is provided with a through hole, one side, close to the base, of the through hole is provided with a first rolling bearing, and an outer ring of the first rolling bearing abuts against the inner side wall of the through hole; a connecting shaft is arranged on an inner ring of the first rolling bearing; the connecting shaft penetrates through the motor body, the motor base is connected with an iron core, the iron core is arranged in the motor body, a winding is wound around the iron core, magnetic steel matched with the winding is arranged on the inner side wall of the motor body, a lining is arranged at the opening, away from the first rolling bearing, of the through hole, and the lining is locally embedded in the through hole. A second rolling bearing is arranged at an opening in the side, away from the through hole, of the lining, the outer peripheral side of the connecting shaft is connected to an inner ring of the second rolling bearing, and the impact load resistance of the vehicle-mounted laser radar brushless motor can be enhanced.

Description

Technical Field

[0001] This application relates to the field of lidar technology, and in particular to a brushless motor for vehicle-mounted lidar. Background Technology

[0002] Although brushless motors have a relatively short history of development in my country, they have experienced rapid growth due to the increasing maturity and sophistication of the technology. Currently, brushless motors are widely used in various fields such as model aircraft, medical devices, home appliances, and electric vehicles.

[0003] Existing external rotor brushless motor structures typically include a stator assembly, a rotor assembly, and bearings supporting the rotor. The stator assembly typically includes a frame, an iron core, windings wound around the iron core, and a circuit board. The rotor assembly typically includes a housing, magnets, and a shaft. A boss at one end of the frame passes through the inner hole of the iron core, and a rolling bearing is embedded in the inner hole of the frame boss. The rotor is connected to the inner ring of the rolling bearing via the shaft, driving the inner ring of the bearing to rotate.

[0004] The rolling bearings used in this conventional structure are limited by the size of the iron core bore, resulting in relatively weak resistance to impact loads. Summary of the Invention

[0005] To enhance the impact load resistance of brushless motors for vehicle-mounted LiDAR, this application provides a brushless motor for vehicle-mounted LiDAR.

[0006] The brushless motor for vehicle-mounted lidar provided in this application adopts the following technical solution: A brushless motor for vehicle-mounted lidar includes a motor body; the motor body is provided with a base; the base has a through hole; a first rolling bearing is provided on the side of the through hole near the base; the outer ring of the first rolling bearing abuts against the inner wall of the through hole; a connecting shaft is provided on the inner ring of the first rolling bearing; the connecting shaft passes through the motor body; an iron core is connected to the base; the iron core is disposed inside the motor body; a winding is wound on the iron core; a magnet matching the winding is provided on the inner wall of the motor body; a bushing is provided at the opening of the through hole away from the first rolling bearing; the bushing is partially nested inside the through hole; a second rolling bearing is provided at the opening on the side of the bushing away from the through hole; the outer periphery of the connecting shaft is connected to the inner ring of the second rolling bearing.

[0007] By adopting the above technical solution, when the user uses the brushless motor of the vehicle-mounted LiDAR, the motor operates through the interaction of the magnet and the winding. The connecting shaft drives the inner rings of the first and second rolling bearings to rotate. The bushing effectively increases the distance between the first and second rolling bearings, thereby increasing the span between them and enhancing the overall rigidity of the motor. This improves the impact load resistance of the brushless motor. Furthermore, the bushing allows the second rolling bearing to be independent of the iron core, reducing the restriction of the through-hole on the second rolling bearing and further improving the impact load resistance and the smoothness of the motor's normal operation.

[0008] Preferably, the bushing includes a fixing part, a connecting part, and a mounting part; the fixing part is connected to the inner wall of the through hole; the connecting part is disposed outside the through hole; one side opening of the connecting part is connected to one side opening of the fixing part; the other side opening of the connecting part is connected to one side opening of the mounting part; a second rolling bearing is installed on the side opening of the mounting part away from the connecting part; the connecting shaft passes through the fixing part, the connecting part, and the mounting part; the connecting part is inclined; the inner diameter of the mounting part is larger than the outer ring diameter of the fixing part.

[0009] By adopting the above technical solution, when the user uses the brushless motor of the vehicle-mounted LiDAR, the second rolling bearing can be set outside the iron core through the bushing. Therefore, the connection part connecting the fixing part and the mounting part can enhance the stability of the bushing installation and improve the stability of the normal operation of the brushless motor of the vehicle-mounted LiDAR. In addition, the inner diameter of the mounting part is larger than the outer ring diameter of the fixing part, so the diameter of the second rolling bearing can be larger than the outer ring diameter of the fixing part, that is, the diameter of the second rolling bearing can be larger than the diameter of the through hole, further improving the impact load resistance of the whole machine and improving the stability of the normal use of the brushless motor of the vehicle-mounted LiDAR.

[0010] Preferably, an annular groove is provided on the outer periphery of the fixing part; an annular locking block matching the annular groove is provided on the inner sidewall of the through hole.

[0011] By adopting the above technical solution, when the user uses the brushless motor of the vehicle-mounted LiDAR, the mutual interlocking of the annular block and the annular groove can effectively enhance the stability of the fixed part installation. Thus, the fixed part can enhance the stability of the installation part through the connecting part, that is, effectively enhance the stability of the second rolling bearing, thereby improving the impact load resistance of the whole machine and improving the stability of the normal use of the brushless motor of the vehicle-mounted LiDAR.

[0012] Preferably, a convex ring is provided inside the motor body; the convex ring is used to abut against the second rolling bearing.

[0013] By adopting the above technical solution, when the user uses the brushless motor of the vehicle-mounted LiDAR, a convex ring is set and the convex ring abuts against the second rolling bearing. In this way, the convex ring can effectively improve the installation stability of the second rolling bearing, reduce the possibility of the second rolling bearing coming off the bushing, and thus improve the stability of the normal use of the brushless motor of the vehicle-mounted LiDAR and improve the impact load resistance of the whole machine.

[0014] Preferably, the base is provided with heat dissipation holes; the heat dissipation holes are connected to the interior of the motor body.

[0015] By adopting the above technical solution, the base is provided with heat dissipation holes, and the heat dissipation holes are connected to the inside of the motor body. Thus, the heat generated by the components inside the motor body under normal working conditions can be dissipated to the outside of the motor body through the heat dissipation holes, thereby reducing the possibility of damage to the internal structure of the motor body due to excessive temperature, improving the stability of the brushless motor for normal use of the vehicle-mounted LiDAR, and further improving the impact load resistance of the brushless motor for the vehicle-mounted LiDAR.

[0016] Preferably, a rotor frame is provided on the outside of the motor body; the rotor frame is sleeved on the outer periphery of the connecting shaft; the rotor frame includes a sleeve portion and an annular protrusion; the annular protrusion is located on the side of the sleeve portion away from the motor body; the annular protrusion is located on the outer periphery of the sleeve portion.

[0017] By adopting the above technical solution, when the user uses the brushless motor of the vehicle-mounted LiDAR, the rotor frame configuration can enhance the stability of the connection between the connecting shaft and the external device, improve the stability of the normal operation of the brushless motor of the vehicle-mounted LiDAR, and the rotor frame is provided with annular protrusions for connection with external devices, which can reduce the pressure of external devices on the sleeve and improve the stability of the sleeve in normal operation; at the same time, the annular protrusions can provide better support for external devices, further enhancing the stability of the connection between the connecting shaft and the external device.

[0018] Preferably, a support portion is provided on the outer periphery of the sleeve portion near the motor body; the support portion abuts against the motor body.

[0019] By adopting the above technical solution, a bearing part is provided on the outer periphery of the sleeve part near the motor body, and the bearing part is pressed against the motor body. Therefore, when the connecting shaft rotates, the bearing part can effectively reduce the possibility of the motor body shifting, thereby improving the stability of the motor body during normal use, and further improving the stability of the brushless motor of the vehicle-mounted lidar during normal use, and improving the impact load resistance of the brushless motor of the vehicle-mounted lidar.

[0020] Preferably, the annular protrusion is provided with a mounting hole.

[0021] By adopting the above technical solution, the annular protrusion is provided with mounting holes, and the annular protrusion is connected to the external device. Therefore, the setting of mounting holes can effectively enhance the convenience of installing the external device and the annular protrusion, saving time and effort and improving work efficiency. In addition, the setting of mounting holes can also further improve the stability of the external device installation, reduce the possibility of the external device detaching from the annular protrusion, improve the stability of the normal use of the vehicle-mounted LiDAR brushless motor, and improve the impact load resistance of the vehicle-mounted LiDAR brushless motor.

[0022] Preferably, at least two mounting holes are provided; at least one mounting hole is arranged opposite to the other mounting hole.

[0023] By adopting the above technical solution, at least two mounting holes are provided, and at least one mounting hole is arranged opposite to another mounting hole, so that the external device can be stably installed on the annular protrusion, which can effectively reduce the possibility of the external device detaching from the annular protrusion, improve the stability of the external device installation, thereby improving the stability of the normal use of the vehicle-mounted LiDAR brushless motor and improving the impact load resistance of the vehicle-mounted LiDAR brushless motor.

[0024] In summary, this application includes at least one of the following beneficial technical effects: 1. When the user uses the brushless motor of the vehicle-mounted LiDAR, the motor runs through the interaction of the magnet and the winding. The connecting shaft drives the inner rings of the first and second rolling bearings to rotate. The bushing effectively increases the distance between the first and second rolling bearings, thereby increasing the span between them. This effectively enhances the overall rigidity of the motor and improves its resistance to impact loads. At the same time, the bushing allows the second rolling bearing to be independent of the iron core, reducing the restriction of the through hole on the second rolling bearing, further improving the impact load resistance of the vehicle-mounted LiDAR brushless motor and enhancing the smoothness of its normal operation. 2. When the user uses the brushless motor of the vehicle-mounted LiDAR, the second rolling bearing can be set outside the iron core through the bushing. Therefore, the connection part connecting the fixing part and the mounting part can enhance the stability of the bushing installation and improve the stability of the normal operation of the brushless motor of the vehicle-mounted LiDAR. In addition, the inner diameter of the mounting part is larger than the outer ring diameter of the fixing part, so the diameter of the second rolling bearing can be larger than the outer ring diameter of the fixing part, that is, the diameter of the second rolling bearing can be larger than the diameter of the through hole, which further improves the impact load resistance of the whole machine and improves the stability of the normal use of the brushless motor of the vehicle-mounted LiDAR. 3. When the user uses the brushless motor of the vehicle-mounted LiDAR, the interlocking of the annular locking block and the annular groove can effectively enhance the stability of the fixed part installation. Thus, the fixed part can enhance the stability of the installation part through the connecting part, that is, effectively enhance the stability of the second rolling bearing, thereby improving the impact load resistance of the whole machine and improving the stability of the normal use of the brushless motor of the vehicle-mounted LiDAR. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of this application.

[0026] Figure 2 This is a cross-sectional view of Embodiment 1 of this application.

[0027] Figure 3 This is a partial exploded view of Embodiment 1 of this application, mainly showing the structure of the rotor frame.

[0028] Figure 4 This is a cross-sectional view of Embodiment 2 of this application.

[0029] Explanation of reference numerals in the attached drawings: 1. Motor body; 11. Magnet; 12. Convex ring; 2. Frame; 21. Through hole; 211. Annular retaining block; 22. First rolling bearing; 23. Connecting shaft; 24. Iron core; 241. Winding; 25. Bushing; 251. Fixing part; 2511. Annular groove; 252. Connecting part; 253. Mounting part; 26. Second rolling bearing; 27. Heat dissipation hole; 3. Rotor frame; 31. Sleeve part; 32. Annular protrusion; 321. Mounting hole; 33. Bearing part. Detailed Implementation

[0030] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0031] Example 1 This application discloses a brushless motor for vehicle-mounted lidar.

[0032] Reference Figure 1 and Figure 2 A brushless motor for vehicle-mounted lidar includes a motor body 1; a base 2 is provided on one side of the motor body 1, and the base 2 is provided with a through hole 21. The part of the base 2 near the interior of the motor body 1 is convex, and the through hole 21 is provided at the center of the base 2, penetrating the convex side of the base 2. A first rolling bearing 22 is provided at the opening of the through hole 21 near the base 2, and the first rolling bearing 22 is embedded in the through hole 21, that is, the outer periphery of the first rolling bearing 22 abuts against the inner sidewall of the through hole 21; and a connecting shaft 23 is provided on the inner ring of the first rolling bearing 22, and the connecting shaft 23 penetrates the motor body 1.

[0033] Reference Figure 2A core 24 is fitted onto the convex side of the base 2, and a winding 241 is wound around the core 24. A magnet 11 matching the winding 241 is provided on the inner wall of the motor body 1. The normal operation of the brushless motor of the vehicle-mounted laser radar is achieved through the cooperation between the magnet 11 and the winding 241. Then, a bushing 25 is provided at the opening of the through hole 21 away from the first rolling bearing 22. The bushing 25 includes a fixing part 251, a connecting part 252, and a mounting part 253. The fixing part 251 is embedded in the inner wall of the through hole 21, and the connecting part 252 and the mounting part 253 are both provided outside the through hole 21. Then, one opening of the connecting part 252 is connected to one opening of the fixing part 251, and the other opening of the connecting part 252 is connected to one opening of the mounting part 253. The second rolling bearing 26 is installed in the opening on the side of the mounting part 253 away from the connecting part 252. The outer periphery of the connecting shaft 23 is connected to the inner ring of the second rolling bearing 26. Therefore, the bushing 25 can make the second rolling bearing 26 independent of the iron core 24, which can effectively reduce the possibility that the second rolling bearing 26 is limited by the size of the inner hole of the iron core 24, improve the impact load resistance of the vehicle-mounted LiDAR brushless motor, and also effectively enhance the stability of the vehicle-mounted LiDAR brushless motor during normal use. Furthermore, the bushing 25 can also effectively increase the span between the first rolling bearing 22 and the second rolling bearing 26, thereby effectively enhancing the rigidity of the whole machine and further improving the impact load resistance of the vehicle-mounted LiDAR brushless motor.

[0034] Reference Figure 2 The connecting shaft 23 passes through the fixing part 251, the connecting part 252, and the mounting part 253. The connecting part 252 is inclined, and the inner diameter of the mounting part 253 is larger than the outer ring diameter of the fixing part 251. The inclined connecting part 252 can effectively reduce the space occupied by the connecting part 252 inside the motor body 1, improve the space utilization rate inside the motor body 1, and enhance the smoothness of the transition from the fixing part 251 to the mounting part 253. It can also reduce the possibility of the bushing 25 deforming or even cracking due to uneven force, and improve the stability of the bushing 25 during normal use. Then, the inner diameter of the mounting hole 321 is larger than the outer ring diameter of the fixing part 251. In this embodiment, the diameter of the second rolling bearing 26 is larger than the diameter of the through hole 21, which effectively enhances the stability of the second rolling bearing 26 and improves the smoothness of the rotation of the vehicle-mounted laser radar brushless motor. Furthermore, the use of a larger second rolling bearing 26 can effectively improve the impact load resistance of the vehicle-mounted laser radar brushless motor.

[0035] Reference Figure 3The motor body 1 is provided with a rotor frame 3. The rotor frame 3 includes a sleeve part 31, an annular protrusion 32 and a bearing part 33. The sleeve part 31 is sleeved on the outer periphery of the connecting shaft 23. The annular protrusion 32 is located on the side of the sleeve part 31 away from the motor body 1. The bearing part 33 is located on the side of the sleeve part 31 close to the motor body 1. The annular protrusion 32 is opposite to the sleeve part 31 and the bearing part 33 abuts against the motor body 1. Then, the annular protrusion 32 is provided with a mounting hole 321 for connecting external devices.

[0036] When the user uses the brushless motor of the vehicle-mounted LiDAR, the rotor frame 3 can enhance the stability of the connection between the connecting shaft 23 and the external device, improve the stability of the normal use of the brushless motor of the vehicle-mounted LiDAR, and the rotor frame 3 is provided with an annular protrusion 32, which is provided with a mounting hole 321 for connecting with the external device. This can reduce the pressure of the external device on the sleeve part 31 and improve the stability of the sleeve part 31 during normal use.

[0037] Reference Figure 3 At least two mounting holes 321 are provided. In this embodiment, four mounting holes 321 are provided. At least one mounting hole 321 is arranged opposite to another mounting hole 321, which can effectively enhance the stability of the external device installation and improve the stability of the brushless motor of the vehicle-mounted lidar.

[0038] Reference Figure 1 The base 2 is provided with heat dissipation holes 27, and the heat dissipation holes 27 are connected to the inside of the motor body 1, which facilitates rapid heat dissipation when the vehicle-mounted LiDAR brushless motor is working. That is, the heat generated by the components inside the motor body 1 under normal working conditions can be dissipated to the outside of the motor body 1 through the heat dissipation holes 27, thereby reducing the possibility of damage to the internal structure of the motor body 1 due to excessive temperature and improving the stability of the vehicle-mounted LiDAR brushless motor during normal use.

[0039] Reference Figure 2 The motor body 1 has a convex ring 12 inside, and the convex ring 12 abuts against the second rolling bearing 26. Thus, the convex ring 12 can effectively improve the installation stability of the second rolling bearing 26, reduce the possibility of the second rolling bearing 26 detaching from the bushing 25, thereby improving the stability of the brushless motor of the vehicle laser radar and improving the impact load resistance of the whole machine.

[0040] The implementation principle of a brushless motor for vehicle-mounted LiDAR in this application embodiment is as follows: When the user uses the brushless motor for vehicle-mounted LiDAR, the motor operates through the cooperation of the magnet 11 and the winding 241. The connecting shaft 23 drives the inner rings of the first rolling bearing 22 and the second rolling bearing 26 to rotate. The bushing 25 effectively increases the distance between the first rolling bearing 22 and the second rolling bearing 26, that is, increases the span between the first rolling bearing 22 and the second rolling bearing 26, thereby effectively enhancing the overall rigidity of the motor and improving its impact load resistance. At the same time, the bushing 25 allows the second rolling bearing 26 to be independent of the iron core 24, reducing the need for through holes 21. The limitation on the second rolling bearing 26 further improves the impact load resistance of the vehicle-mounted laser brushless motor and enhances the smoothness of its normal operation. The connection part 252 connects the fixing part 251 and the mounting part 253, which strengthens the stability of the bushing 25 installation and improves the stability of the vehicle-mounted laser radar brushless motor's normal operation. Furthermore, the inner diameter of the mounting part 253 is larger than the outer ring diameter of the fixing part 251, allowing the diameter of the second rolling bearing 26 to be larger than the outer ring diameter of the fixing part 251, i.e., the diameter of the second rolling bearing 26 to be larger than the diameter of the through hole 21. This further enhances the overall impact load resistance and improves the stability of the vehicle-mounted laser radar brushless motor during normal use.

[0041] Example 2, Reference Figure 4 Based on Embodiment 1, the main difference between Embodiment 1 and Embodiment 2 of this application is that the connection method between the fixing part 251 and the through hole 21 is different. In this embodiment, the fixing part 251 is provided with an annular groove 2511 on its outer periphery, and the inner wall of the through hole 21 is provided with an annular locking block 211 that engages with the annular groove 2511.

[0042] By interlocking the annular locking block 211 with the annular groove 2511, the stability of the fixing part 251 embedded in the through hole 21 can be effectively enhanced, reducing the possibility of the bushing 25 slipping out of the through hole 21. In other embodiments, the annular groove 2511 can be semi-circular, polygonal, or other shapes, and the annular locking block 211 and the annular groove 2511 are matched.

[0043] The implementation principle of a vehicle-mounted LiDAR brushless motor according to an embodiment of this application is as follows: When the user uses the vehicle-mounted LiDAR brushless motor, the connecting part 252 connects the fixing part 251 and the mounting part 253, which can enhance the stability of the bushing 25 installation, improve the stability of the normal operation of the vehicle-mounted LiDAR brushless motor, and further enhance the stability of the fixing part 251 installation through the mutual engagement of the annular groove 2511 and the annular locking block 211, improve the impact load resistance of the whole machine, and improve the stability of the normal use of the vehicle-mounted LiDAR brushless motor.

[0044] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A vehicle-mounted laser radar brushless motor, characterized by: The motor body (1) includes a base (2) on which a motor body (1) is mounted. The base (2) has a through hole (21). A first rolling bearing (22) is provided on the side of the through hole (21) near the base (2). The outer ring of the first rolling bearing (22) abuts against the inner wall of the through hole (21). A connecting shaft (23) is provided on the inner ring of the first rolling bearing (22). The connecting shaft (23) passes through the motor body (1). An iron core (24) is connected to the base (2). The iron core (24) is located on the motor body. (1) Inside; the iron core (24) is wound with a winding (241); the inner wall of the motor body (1) is provided with a magnet (11) that matches the winding (241); a bushing (25) is provided at the opening of the through hole (21) away from the first rolling bearing (22); the bushing (25) is partially nested inside the through hole (21); a second rolling bearing (26) is provided at the opening of the bushing (25) away from the through hole (21); the outer circumference of the connecting shaft (23) is connected to the inner ring of the second rolling bearing (26).

2. The vehicle-mounted laser radar brushless motor according to claim 1, characterized in that: The bushing (25) includes a fixing part (251), a connecting part (252), and a mounting part (253); the fixing part (251) is connected to the inner wall of the through hole (21); the connecting part (252) is disposed outside the through hole (21); one side opening of the connecting part (252) is connected to one side opening of the fixing part (251); the other side opening of the connecting part (252) is connected to one side opening of the mounting part (253); the second rolling bearing (26) is installed on the side opening of the mounting part (253) away from the connecting part (252); the connecting shaft (23) passes through the fixing part (251), the connecting part (252), and the mounting part (253); the connecting part (252) is inclined; the inner diameter of the mounting part (253) is larger than the outer ring diameter of the fixing part (251).

3. The brushless motor for vehicle-mounted lidar according to claim 2, characterized in that: The outer periphery of the fixing part (251) is provided with an annular groove (2511); the inner wall of the through hole (21) is provided with an annular locking block (211) that matches the annular groove (2511).

4. The brushless motor for vehicle-mounted lidar according to claim 1, characterized in that: The motor body (1) has a protruding ring (12) inside; the protruding ring (12) is used to abut against the second rolling bearing (26).

5. A brushless motor for vehicle-mounted lidar according to claim 1, characterized in that: The base (2) is provided with heat dissipation holes (27); the heat dissipation holes (27) are connected to the interior of the motor body (1).

6. A brushless motor for vehicle-mounted lidar according to claim 1, characterized in that: The motor body (1) is provided with a rotor frame (3) on its outside; the rotor frame (3) is sleeved on the outer periphery of the connecting shaft (23); the rotor frame (3) includes a sleeve portion (31) and an annular protrusion (32); the annular protrusion (32) is located on the side of the sleeve portion (31) away from the motor body (1); the annular protrusion (32) is located on the outer periphery of the sleeve portion (31).

7. A brushless motor for vehicle-mounted lidar according to claim 6, characterized in that: A support part (33) is provided on the outer periphery of the sleeve part (31) near the motor body (1); the support part (33) abuts against the motor body (1).

8. A brushless motor for vehicle-mounted lidar according to claim 6, characterized in that: The annular protrusion (32) is provided with a mounting hole (321).

9. A brushless motor for vehicle-mounted lidar according to claim 8, characterized in that: At least two mounting holes (321) are provided; at least one mounting hole (321) is provided opposite to the other mounting hole (321).

Images