CN222915739U

CN222915739U - A brushless motor

Info

Publication number: CN222915739U
Application number: CN202421795982.3U
Authority: CN
Inventors: 李汉江
Original assignee: Shenzhen Qichilong Technology Co ltd
Current assignee: Shenzhen Qichilong Technology Co ltd
Priority date: 2024-07-29
Filing date: 2024-07-29
Publication date: 2025-05-27
Anticipated expiration: 2034-07-29

Abstract

The utility model relates to the technical field of motors, and discloses a brushless motor, including a stator bracket, a rotating shaft, a stator, a rotor and a PCB board, wherein an annular protrusion is provided in the middle of the stator bracket, the stator is fixedly provided outside the annular protrusion, a bearing is embedded in the annular protrusion, the rotating shaft is rotatably connected to the annular protrusion through the bearing, the rotor is sleeved on the outside of the rotating shaft, the stator bracket is provided with a threaded column for connecting with the outside, the threaded column is evenly distributed around the circumference of the rotor, the threaded column and the rotor are arranged on the same side of the stator bracket, the PCB board is located between the rotor and the stator bracket, and the PCB board is arranged close to the side wall of the stator bracket. The beneficial effects of the utility model: the axial size of the brushless motor is reduced, and at the same time, the space between the stator bracket and the rotor is fully utilized, the PCB board is reasonably arranged, the overall size of the brushless motor is reduced, and the production cost is reduced.

Description

Brushless motor

Technical Field

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

Background

The brushless DC motor is composed of a motor main body and a driver, and is a typical electromechanical integrated product. Because the brushless DC motor operates in a self-control mode, a starting winding is not additionally arranged on a rotor like a synchronous motor which is started under heavy load under variable frequency speed regulation, and oscillation and step-out can not be generated when the load is suddenly changed.

The existing brushless motor overall structure is complex, when the brushless motor is used in connection with the outside, a thread post is generally arranged on the stator support, the thread post and the rotor are respectively located at two sides of the stator support, so that the axial size of the brushless motor is large, and a large installation space is required to be occupied. In addition, the space utilization rate between the stator support and the rotor is lower, and an independent installation space is required to be arranged when the PCB is installed, so that the whole size of the brushless motor is larger, and the production cost is increased.

Disclosure of utility model

The utility model aims to provide the brushless motor, which reduces the axial size of the brushless motor, fully utilizes the space between the stator bracket and the rotor, reasonably arranges the PCB, reduces the overall size of the brushless motor and reduces the production cost.

In order to achieve the above purpose, the utility model provides a brushless motor, which comprises a stator support, a rotating shaft, a stator, a rotor and a PCB (printed circuit board), wherein an annular bulge is arranged in the middle of the stator support, the stator is fixedly arranged outside the annular bulge, a bearing is embedded in the annular bulge, the rotating shaft is rotationally connected with the annular bulge through the bearing, the rotor is sleeved outside the rotor, the stator support is provided with threaded columns used for being connected with the outside, the threaded columns are uniformly distributed around the circumference of the rotor, the threaded columns and the rotor are arranged on the same side of the stator support, the PCB is sleeved on the annular bulge, the PCB is positioned between the rotor and the stator support, and the PCB is arranged close to the side wall of the stator support.

Still further, the stator support is provided with a support post opposite to the direction in which the threaded post extends, the support post being adapted to be connected to an external gear set.

Still further, the cross section of the threaded post is circular or polygonal or elliptical.

Still further, the inside cavity of stator support and one end opening are equipped with the installation cavity, annular arch stator and the rotor all is located the installation cavity, opening part detachable is equipped with the apron, the tip of pivot runs through the apron, the apron or be equipped with the support column on the stator support.

Still further, the PCB laminating the diapire setting of installation cavity, the through wires hole has been seted up to the diapire of installation cavity.

Furthermore, the outer wall of the stator support is provided with a connecting shaft connected with the outside, and the end part of the connecting shaft is provided with a limit groove for installing a clamp spring.

Still further still including the casing, the inside cavity of casing and one end opening are equipped with and hold the chamber, the casing cover is established on the stator support, annular bulge the stator and the rotor is located hold the intracavity, the tip of pivot runs through hold the chamber, and can stretch out hold the chamber.

Further, a support column is arranged on one side of the shell away from the accommodating cavity.

Still further, the housing is provided with the threaded post.

Furthermore, the number of the support columns is at least 2, the support columns are uniformly distributed around the axis of the rotating shaft, and the support columns are arranged on the stator support in an axisymmetric manner or in a rotationally symmetric manner.

Compared with the prior art, the brushless motor has the beneficial effects that the screw thread columns and the rotors are arranged on the same side of the stator support, so that the size of the brushless motor in the axial direction is reduced, meanwhile, the screw thread columns Rao Zhuaizi are uniformly distributed in the circumferential direction, the risk of collision damage of the brushless motor in the transportation process can be reduced, in addition, the PCB is positioned between the rotors and the stator support and is close to the side wall of the stator support, the space between the stator support and the rotors is fully utilized, the PCB is reasonably arranged, the whole size of the brushless motor is reduced, and the production cost is reduced.

Drawings

Fig. 1 is a sectional view of embodiment 1 of a brushless motor provided by the present utility model;

Fig. 2 is a schematic structural view of embodiment 1 of a brushless motor provided by the present utility model;

fig. 3 is a sectional view of embodiment 2 of a brushless motor provided by the present utility model;

fig. 4 is a schematic structural view of a stator frame of embodiment 2 of a brushless motor provided by the present utility model;

fig. 5 is another schematic structural view of a stator frame of embodiment 2 of a brushless motor provided by the present utility model;

fig. 6 is a schematic structural view of a rotating shaft of embodiment 2 of a brushless motor provided by the present utility model;

Fig. 7 is a schematic structural view of embodiment 3 of a brushless motor provided by the present utility model;

fig. 8 is a reference diagram of a use state of a brushless motor provided by the present utility model;

Fig. 9 is a layout reference diagram of a support column of a brushless motor provided by the utility model;

Fig. 10 is another layout reference diagram of a support column of a brushless motor provided by the utility model.

In the figure, 1, a stator bracket, 10, a mounting cavity, 100, a threading hole, 11, an annular bulge, 12, a cover plate, 13, a connecting shaft 131, a limiting groove, 2, a rotating shaft, 3, a stator, 4, a rotor, 5, a PCB (printed circuit board), 6, a bearing, 7, a threaded column, 8, a support column, 9, a shell, 91, a containing cavity, a driving gear, b and a gear transmission group.

Detailed Description

The following describes in further detail the embodiments of the present utility model with reference to the drawings and examples. The following examples are illustrative of the utility model and are not intended to limit the scope of the utility model.

In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "inner", "outer", etc. in the present utility model are based on the positional relationship shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices and elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Example 1

As shown in fig. 1 and 2, a brushless motor according to a preferred embodiment of the present utility model includes a stator support 1, a rotating shaft 2, a stator 3, a rotor 4 and a PCB board 5, where, the stator support 1 is used as an installation carrier for installing other parts, specifically, for facilitating fixing of the stator 3, in this embodiment, an annular protrusion 11 is provided in the middle of the stator support 1, the stator 3 is fixedly provided outside the annular protrusion 11, for facilitating rotation connection of the stator support 1 and the rotating shaft 2, a bearing 6 is embedded in the annular protrusion 11, the rotating shaft 2 is rotatably connected with the annular protrusion 11 through the bearing 6, the rotor 4 is sleeved outside the rotating shaft 2 and can rotate synchronously with the rotating shaft 2, further, for facilitating connection of the whole and the outside of the brushless motor, and simultaneously reducing the size of the brushless motor in the axial direction, a threaded post 7 for connection with the outside is provided on the stator support 1, the threaded post 7 is circumferentially uniformly distributed around the rotor 4, and the threaded post 7 and the rotor 4 are disposed on the same side of the stator support 1, the threaded post 7 can protect the rotor 4, so that risk of collision damage occurring in the running of the brushless motor can be reduced, further, for facilitating fixing of the rotor 5 is disposed on the stator support 1, and the PCB board 5 is further disposed on the side of the stator support 5 and the side of the PCB board, and the PCB board is located close to the side of the stator support 1.

In this embodiment, in order to facilitate the brushless motor to drive the external transmission assembly to work, as shown in fig. 1 and 2, a support column 8 opposite to the extending direction of the threaded column 7 is provided on the stator bracket 1, the support column 8 is used for being connected with an external gear transmission group b, the gear transmission group b can be set to be multi-stage transmission, and a driving gear a for driving the gear transmission group b is provided at the end of the rotating shaft 2, and the driving gear a and the gear transmission group b are engaged for transmission, so as to meet different transmission requirements.

Further, in order to facilitate the design of the threaded post 7, the cross section of the threaded post 7 is circular or polygonal or elliptical. The threaded post 7 is preferably circular in cross section in this embodiment, and can be adapted to the actual production requirements.

Example 2

As shown in fig. 3, 4 and 5, this embodiment is a further improvement on the basis of embodiment 1, and specifically includes the following steps:

Further, in order to be convenient for form better protection to rotor 4, avoid rotor 4 to collide when during operation and transportation, in this embodiment, stator support 1 inside cavity and one end opening are equipped with installation cavity 10, as shown in fig. 3, annular protrusion 11, stator 3 and rotor 4 all are located installation cavity 10, in order to be convenient for to the dismouting to stator 3, rotor 4 and pivot 2, be equipped with apron 12 in the opening part detachable, the end of pivot 2 runs through apron 12, be equipped with support column 8 on apron 12 or the stator support 1, wherein, the end that pivot 2 runs through apron 12 is equipped with driving gear a, be equipped with gear transmission group b on the support column 8, driving gear a and gear transmission group b meshing transmission.

Further, in this embodiment, for convenience in arranging the PCB 5, referring to fig. 3, fig. 5, the PCB 5 is sleeved on the annular protrusion 11 and is attached to the bottom wall of the mounting cavity 10, for convenience in wiring the PCB 5 and the external device, the bottom wall of the mounting cavity 10 is provided with the threading hole 100 for wiring the PCB 5 and the external device.

Further, in the present embodiment, referring to fig. 3, the threaded post 7 may be provided on either the side wall or the end face side wall of the stator frame 1. In order to facilitate connection with external equipment, referring to fig. 5, in addition to the threaded post 7 provided on the stator support 1, a connecting shaft 13 connected with the outside may be provided on the outer wall of the stator support 1, that is, in the mounting process, a shaft hole corresponding to the connecting shaft 13 may be provided on the external equipment, the connecting shaft 13 may be inserted into the shaft hole, and in order to limit the axial direction of the connecting shaft 13, a limit groove 131 for mounting a snap spring may be provided at the end of the connecting shaft 13. At least one of the screw post and the connecting shaft 13 is reserved for design, and the design can be adjusted according to actual installation conditions. Still further, in order to further simplify the connection structure with the external device, referring to fig. 1 and 6, in this embodiment, the end portion of the rotating shaft 2 may penetrate through the stator frame 1, and the end portion is located outside the stator frame 1, for forming a support or transmitting torque when connected with the external device, where whether the end portion of the rotating shaft 2 penetrates through the stator frame 1 is set, and may be adjusted according to the actual design requirement.

Example 3

As shown in fig. 7, this embodiment is a further improvement on the basis of embodiment 1, and is specifically as follows:

Further, in order to achieve the same protection effect on the rotor 4 in embodiment 2, in this embodiment, the rotor further includes a housing 9, specifically, a housing 9 is hollow inside and has an opening at one end provided with a receiving cavity 91, the housing 9 is covered on the stator support 1, the annular protrusion 11, the stator 3 and the rotor 4 are located in the receiving cavity 91, and an end portion of the rotating shaft 2 penetrates through the receiving cavity 91 and can extend out of the receiving cavity 91. In the present embodiment, referring to fig. 6, in order to facilitate connection with the external gear set b, a support column 8 is provided on a side of the housing 9 remote from the accommodating chamber 91. Further, in order to facilitate connection with external devices, a screw column 7 is provided on the housing 9 or the stator frame 1. The positions and the number of the threaded columns 7 can be adaptively adjusted according to actual requirements.

In the above embodiment, the number of the support columns 8 is at least 2, and the support columns 8 are uniformly distributed around the axis of the rotating shaft 2, and the support columns 8 are axisymmetrically arranged or rotationally symmetrically arranged on the stator support frame 1, wherein the length and the diameter of the support columns 8 can be adjusted according to the actual arrangement of the gear transmission group b, and the length and the diameter of each support column 8 are not required to be the same, and referring to fig. 8, 9 and 10, the arrangement mode of the support columns 8 can be synchronously adjusted according to the number and the arrangement mode of the gear transmission group b.

In summary, the embodiment of the utility model provides a brushless motor, the screw thread post 7 and the rotor 4 are arranged on the same side of the stator support 1, so that the size of the brushless motor in the axial direction is reduced, meanwhile, the screw thread post 7 is uniformly distributed around the rotor 4 in the circumferential direction, the risk of collision damage of the brushless motor in the transportation process can be reduced, in addition, the PCB 5 is positioned between the rotor 4 and the stator support 1 and is close to the side wall of the stator support 1, the space between the stator support 1 and the rotor 4 is fully utilized, the PCB 5 is reasonably arranged, the whole size of the brushless motor is reduced, and the production cost is reduced.

The foregoing is merely a preferred embodiment of the present utility model, and it should be noted that modifications and substitutions can be made by those skilled in the art without departing from the technical principles of the present utility model, and these modifications and substitutions should also be considered as being within the scope of the present utility model.

Claims

1. The brushless motor is characterized by comprising a stator support, a rotating shaft, a stator, a rotor and a PCB (printed circuit board), wherein an annular bulge is arranged in the middle of the stator support, the stator is fixedly arranged outside the annular bulge, a bearing is embedded in the annular bulge, the rotating shaft is rotationally connected with the annular bulge through the bearing, the rotor is sleeved outside the rotating shaft, the stator support is provided with threaded columns used for being connected with the outside, the threaded columns are uniformly distributed around the circumference of the rotor, the threaded columns and the rotor are arranged on the same side of the stator support, the PCB is sleeved on the annular bulge, the PCB is positioned between the rotor and the stator support, and the PCB is close to the side wall of the stator support.

2. The brushless motor of claim 1, wherein the stator frame is provided with a support post opposite to the direction in which the screw post extends, the support post being adapted to be connected to an external gear train.

3. The brushless motor of claim 1, wherein the cross section of the threaded post is circular or polygonal or elliptical.

4. The brushless motor of claim 1, wherein the stator support is hollow, an installation cavity is formed in one end of the stator support, the annular protrusion, the stator and the rotor are all located in the installation cavity, a cover plate is detachably arranged at the opening, the end part of the rotating shaft penetrates through the cover plate, and a support column is arranged on the cover plate or the stator support.

5. The brushless motor of claim 4, wherein the PCB is attached to a bottom wall of the mounting cavity, and a threading hole is formed in the bottom wall of the mounting cavity.

6. The brushless motor of claim 4, wherein the outer wall of the stator support is provided with a connecting shaft connected with the outside, and a limit groove for installing a clamp spring is formed at the end part of the connecting shaft.

7. The brushless motor of claim 1, further comprising a housing, wherein the housing is hollow and has an opening at one end, the housing is covered on the stator support, the annular protrusion, the stator and the rotor are located in the housing, and an end of the rotating shaft penetrates through the housing and can extend out of the housing.

8. The brushless motor of claim 7, wherein the housing is provided with a support column on a side away from the accommodating chamber.

9. The brushless motor of claim 7, wherein the housing is provided with the threaded post.

10. The brushless motor of claim 2, 4 or 8, wherein the number of the support columns is at least 2, and the support columns are uniformly distributed around the axis of the rotating shaft, and the support columns are axially symmetrically arranged or rotationally symmetrically arranged on the stator support.