CN216959459U

CN216959459U - Brushless motor structure for laser radar

Info

Publication number: CN216959459U
Application number: CN202220457947.5U
Authority: CN
Inventors: 邓世镇; 桑权; 杜传涛; 刘�东
Original assignee: Shenzhen Dedaxing Drive Technology Co ltd
Current assignee: Shenzhen Dedaxing Drive Technology Co ltd
Priority date: 2022-03-04
Filing date: 2022-03-04
Publication date: 2022-07-12
Anticipated expiration: 2032-03-04

Abstract

The utility model discloses a brushless motor structure for a laser radar, which comprises a stator assembly, a rotor assembly and a winding assembly, wherein the stator assembly comprises a base and a shaft arranged on the base, the winding assembly is arranged on the shaft, the rotor assembly comprises a shell and a magnetic ring arranged in the shell, two ends of the winding assembly are respectively provided with a first bearing and a second bearing, inner rings of the first bearing and the second bearing are respectively and oppositely fixed with the shaft, the shell is sleeved on the shaft, two ends of the shell are respectively connected with outer rings of the first bearing and the second bearing, the shaft and the base of the structure are fixed to form a stator, and an outer ring of the bearing is fixed with the shell of a rotor; meanwhile, the two bearings are placed at two ends of the iron core in a large span, so that the supporting rigidity of the rotor is improved, and the impact resistance and the rotation stability of the whole machine are further improved.

Description

Brushless motor structure for laser radar

Technical Field

The utility model relates to the technical field of motors, in particular to a brushless motor structure for a laser radar.

Background

In recent years, laser radars are widely applied to the field of navigation, such as the field of obstacle avoidance of unmanned aerial vehicles and automatic driving of intelligent vehicles, and the application scenes are continuously expanded. From the scanning principle, there are roughly classified into mechanical type, hybrid solid state (MEMS, mirror-rotating type, and prism type), and all solid state. At the present stage, the hybrid solid-state laser radar is the mainstream research and development from the comprehensive consideration of the detection precision, distance, process realization and the like. For the rotating mirror type laser radar, most manufacturers generally adopt an outer rotor brushless motor. Conventional outer rotor brushless motor structures typically include a stator assembly, a rotor assembly, and supported bearings. As shown in fig. 1, the stator assembly generally comprises a housing, a core, windings around the core, and a circuit board. The rotor assembly typically comprises a casing, magnetic steel and a shaft. The shaft is typically attached to the housing by interference or welding. The outer ring of the rolling bearing is embedded in the base of the stator. The rotor is connected with the inner ring of the rolling bearing through a shaft and drives the inner ring of the rolling bearing to rotate.

Due to the structural arrangement, the rolling bearing used in the conventional outer rotor brushless motor structure is relatively small, cannot provide strong impact resistance, and the structural combination mode needs to be adjusted.

SUMMERY OF THE UTILITY MODEL

In view of this, the present invention provides a brushless motor structure for a laser radar, in which a larger bearing can be installed, so that the motor has a stronger impact resistance.

The technical scheme is as follows: a brushless motor structure for laser radar, includes stator module, rotor subassembly, winding subassembly, its key lies in: the stator assembly comprises a base and a shaft installed on the base, the winding assembly is installed on the shaft, the rotor assembly comprises a casing and a magnetic ring installed in the casing, a first bearing and a second bearing are respectively arranged at two ends of the winding assembly, inner rings of the first bearing and the second bearing are respectively fixed relative to the shaft, the casing is sleeved on the shaft, and two ends of the casing are respectively connected with outer rings of the first bearing and the second bearing. By adopting the technical scheme, compared with the traditional brushless motor, the shaft and the base of the structure are fixed to form the stator, the outer ring of the bearing is fixed to the shell of the rotor, and the structure can use a larger bearing under the condition that the size of the motor is not influenced, and the larger the size of the bearing is, the stronger the bearing load capacity is, so that the rotating stability is improved, and the impact resistance of the whole motor is enhanced; meanwhile, the two bearings are placed at two ends of the iron core in a large span, so that the supporting rigidity of the rotor is improved, and the impact resistance and the rotation stability of the whole machine are further improved.

Preferably, the method comprises the following steps:

the second bearing is located at the upper end of the winding assembly, the inner ring of the second bearing is hooped on the shaft, the outer ring of the second bearing is fixedly connected with the casing, an annular gasket groove is formed in the side wall of the shaft, a first gasket is installed in the gasket groove, and the first gasket is hooped by the inner ring of the second bearing. By adopting the structure, the shaft and the bearing inner ring are additionally provided with the gasket, which is beneficial to reducing the radial swing of the complete machine rotor.

The bearing comprises a base, a shaft, a bearing part and a first bearing, wherein the base is provided with a shaft hole, the shaft is fixedly installed in the shaft hole, the base is provided with a convex bearing part around the shaft, the first bearing is close to the base, and an inner ring of the first bearing is fixedly connected with the bearing part. By adopting the structure, the bearing part can enable the shaft to be supported more powerfully, the placing position of the first bearing occupies the overlapping opening of the machine shell and the base, does not occupy the internal space of the machine shell, and is beneficial to reducing the volume of the motor.

The inner ring of the first bearing is sleeved on the side wall of the bearing part, the lower end of the inner ring of the first bearing is abutted against the step of the bearing part, a first steel sleeve is mounted on the shaft between the winding assembly and the bearing part, and the upper end of the inner ring of the first bearing is abutted against the first steel sleeve. By adopting the structure, the radial position of the first bearing is limited by the first steel sleeve, and meanwhile, the first steel sleeve also plays a role in limiting the radial position of the lower end of the winding assembly.

The rotor assembly further comprises a magnetic yoke, the magnetic yoke is fixedly connected with the inner wall of the casing, and the magnetic ring is fixedly connected with the inner wall of the magnetic yoke.

And a second steel sleeve is fixedly arranged on a shaft at the upper end of the second bearing, and a wave spring is arranged on the shaft between the second steel sleeve and the second bearing. By adopting the structure, the wave spring plays a role in pre-pressing the bearing, and is beneficial to reducing the radial swing of the rotor of the whole machine when rotating.

A second gasket is arranged in the machine shell below the second bearing, the excircle of the second gasket is fixedly connected with the inner wall of the machine shell, and the lower end of the second bearing is abutted against the second gasket;

and a third gasket is arranged in the machine shell above the first bearing, the excircle of the third gasket is fixedly connected with the inner wall of the machine shell, and the upper end of the first bearing is abutted against the third gasket.

By adopting the structure, the corresponding bearing is supported and limited by different gaskets.

Compared with the prior art, the utility model has the beneficial effects that: the structure can use a larger bearing under the condition of not influencing the volume of the motor, and the larger the size of the bearing is, the stronger the bearing load capacity is, so that the rotating stability is improved, and the impact resistance of the whole machine is enhanced; meanwhile, the two bearings are placed at two ends of the iron core in a large span, so that the supporting rigidity of the rotor is improved, and the impact resistance and the rotation stability of the whole machine are further improved.

Drawings

Fig. 1 is a schematic structural view of a conventional brushless motor;

FIG. 2 is an exploded view of the rotor assembly and some other components of the motor;

FIG. 3 is an exploded view of the stator assembly, winding assembly and some other components of the electric machine;

FIG. 4 is a schematic plan view of the motor;

fig. 5 is a sectional view a-a of fig. 4.

Detailed Description

The present invention will be further described with reference to the following examples and the accompanying drawings.

As shown in fig. 2-5, a brushless motor structure for a laser radar includes a stator assembly, a rotor assembly, and a winding assembly, the stator assembly and the winding assembly are disposed in the rotor assembly, the stator assembly includes a base 1 and a shaft 2 mounted on the base 1, the winding assembly is mounted on the shaft 2, the rotor assembly includes a casing 3 and a magnetic ring 10 mounted in the casing 3, a first bearing 4 and a second bearing 5 for supporting the casing 3 are respectively disposed at two ends of the winding assembly, inner rings of the first bearing 4 and the second bearing 5 are respectively fixed to the shaft 2, the casing 3 is sleeved on the shaft 2, and two ends of the casing 3 are respectively connected to outer rings of the first bearing 4 and the second bearing 5.

In this embodiment, the end of the upper and lower fingers close to the base is lower, whereas the end far from the base is upper.

Install control panel 17 on the base 1, the winding subassembly is including being equipped with the iron core 15 in wire winding groove and winding 16 in the wire winding groove of iron core 15 and take a percentage and weld on the control panel, and the insulating layer has been scribbled on iron core 15, and iron core 15 is fixed on axle 2.

The rotor assembly further comprises a magnetic yoke 9, the magnetic yoke 9 and a magnetic ring 10 are both cylindrical, the outer wall of the magnetic yoke 9 is fixedly connected with the inner wall of the machine shell 3, the outer wall of the magnetic ring 10 is fixedly connected with the inner wall of the magnetic yoke 9, and the shaft 2 and the winding assembly are located inside the magnetic ring 10.

The casing 3 is cylindrical, a shaft hole is formed in the base 1, the shaft 2 is fixedly installed in the shaft hole, a protruding bearing part 6 is arranged on the base 1 around the shaft 2, a part of the bearing part 6 extends into the lower end of the casing 3, the first bearing 4 is close to the base 1, and an inner ring of the first bearing 4 is fixedly connected with the bearing part 6. Specifically, the side wall of the bearing part 6 is provided with an annular notch for leading out a winding tap, the inner ring of the first bearing 4 is sleeved on the side wall of the bearing part 6, the lower end of the inner ring of the first bearing 4 abuts against the step of the bearing part 6, a first steel sleeve 7 is mounted on the shaft 2 between the winding assembly and the bearing part 6, the upper end of the inner ring of the first bearing 4 abuts against the first steel sleeve 7, a third gasket 14 is arranged in the casing 3 above the first bearing 4, the outer circle of the third gasket 14 is fixedly connected with the inner wall of the casing 3, and the upper end of the outer ring of the first bearing 4 abuts against the third gasket 14.

The second bearing 5 is located at the upper end of the winding assembly, the inner ring of the second bearing 5 is tightly hooped on the shaft 2 and fixedly connected with the shaft, the outer ring of the second bearing 5 is fixedly connected with the inner wall of the casing 3, an annular gasket groove is formed in the side wall of the shaft 2, a first gasket 8 is installed in the gasket groove, and the first gasket 8 is tightly hooped by the inner ring of the second bearing 5.

A second gasket 13 is arranged in the machine shell 3 below the second bearing 5, the excircle of the second gasket 13 is fixedly connected with the inner wall of the machine shell 3, the lower end of the outer ring of the second bearing 5 abuts against the second gasket 13, the shaft 2 is located in the inner circles of the second gasket 13 and the third gasket 14, and the first bearing 4 and the second bearing 5 are both rolling bearings.

And a third steel sleeve 18 is arranged on the shaft 2 at the upper end of the winding assembly, the upper end of the iron core 15 is tightly propped against the third steel sleeve 18, the lower end of the iron core is tightly propped against the first steel sleeve 7, and the two steel sleeves fix the axial position of the winding assembly.

And a second steel sleeve 11 is fixedly arranged on the shaft 2 at the upper end of the second bearing 5, a wave spring 12 is arranged on the shaft 2 between the second steel sleeve 11 and the second bearing 5, and the wave spring 12 is clamped between the second bearing 5 and the second steel sleeve 11, so that the second bearing 5 is axially pre-pressed.

Finally, it should be noted that the above-mentioned description is only a preferred embodiment of the present invention, and that those skilled in the art can make various similar representations without departing from the spirit and scope of the present invention.

Claims

1. A brushless motor structure for laser radar, includes stator module, rotor subassembly, winding subassembly, its characterized in that: stator module includes base (1) and installs axle (2) on base (1), winding assembly installs on axle (2), the rotor subassembly includes casing (3), installs magnetic ring (10) in casing (3), winding assembly both ends are equipped with first bearing (4) and second bearing (5) respectively, the inner circle of first bearing (4) and second bearing (5) respectively with axle (2) relatively fixed, casing (3) suit is in on axle (2), casing (3) both ends respectively with the outer lane of first bearing (4) and second bearing (5) is connected.

2. A brushless motor structure for lidar according to claim 1, wherein: the winding device is characterized in that the second bearing (5) is located at the upper end of the winding assembly, the inner ring of the second bearing (5) is clamped on the shaft (2), the outer ring of the second bearing (5) is fixedly connected with the casing (3), an annular gasket groove is formed in the side wall of the shaft (2), a first gasket (8) is installed in the gasket groove, and the inner ring of the second bearing (5) is used for clamping the first gasket (8).

3. A brushless motor structure for lidar according to claim 1 or 2, characterized in that: the bearing comprises a base (1), a shaft hole is formed in the base (1), a shaft (2) is fixedly installed in the shaft hole, a protruding bearing portion (6) is arranged on the base (1) and surrounds the shaft (2), a first bearing (4) is close to the base (1), and an inner ring of the first bearing (4) is fixedly connected with the bearing portion (6).

4. A brushless motor structure for lidar according to claim 3, wherein: the inner ring of the first bearing (4) is sleeved on the side wall of the bearing part (6), the lower end of the inner ring of the first bearing is abutted against a step of the bearing part (6), a first steel sleeve (7) is mounted on the shaft (2) between the winding assembly and the bearing part (6), and the upper end of the inner ring of the first bearing (4) is abutted against the first steel sleeve (7).

5. A brushless motor structure for lidar according to claim 3, wherein: the rotor assembly further comprises a magnetic yoke (9), the magnetic yoke (9) is fixedly connected with the inner wall of the machine shell (3), and the magnetic ring (10) is fixedly connected with the inner wall of the magnetic yoke (9).

6. A brushless motor structure for lidar according to claim 2, wherein: and a second steel sleeve (11) is fixedly mounted on the shaft (2) at the upper end of the second bearing (5), and a wave spring (12) is mounted on the shaft (2) between the second steel sleeve (11) and the second bearing (5).

7. A brushless motor structure for lidar according to claim 2 or 6, characterized in that: a second gasket (13) is arranged in the machine shell (3) below the second bearing (5), the excircle of the second gasket (13) is fixedly connected with the inner wall of the machine shell (3), and the lower end of the second bearing (5) is abutted against the second gasket (13);

a third gasket (14) is arranged in the machine shell (3) above the first bearing (4), the excircle of the third gasket (14) is fixedly connected with the inner wall of the machine shell (3), and the upper end of the first bearing (4) abuts against the third gasket (14).