CN212660076U

CN212660076U - Compact brushless motor

Info

Publication number: CN212660076U
Application number: CN202021643721.1U
Authority: CN
Inventors: 程浩; 朱延平
Original assignee: Niuli Motor Co ltd
Current assignee: Niuli Motor Co ltd
Priority date: 2020-08-10
Filing date: 2020-08-10
Publication date: 2021-03-05
Anticipated expiration: 2030-08-10

Abstract

The utility model discloses a compact brushless motor has set up a plurality of convex parts in one side that the frame is close to the circuit board and has come with circuit board fixed connection, the height of convex part make the circuit board be fixed in after the frame, certain accommodation space has between circuit board and the frame, hold the electronic component on the circuit board, effectively reduced circuit board area, compare with traditional brushless motor, power is the same, but the volume is littleer, has reduced manufacturing cost, and little volume's brushless motor is also more convenient in the aspect of the installation. In addition, the positions of the outer wall of the sleeve and the position of the stator core corresponding to the sleeve are respectively provided with a mutually matched limiting strip and a limiting groove, so that the sleeve can better limit the stator core.

Description

Compact brushless motor

Technical Field

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

Background

Brushless motor generally includes stator and around stator pivoted rotor, and the stator includes stator core and a plurality of tooth portion that extend out by stator core, winds on the tooth portion and establishes the enameled wire, and all tooth portions all form stator winding after establishing the enameled wire. The stator winding generates a rotating magnetic field after being electrified, the rotor is arranged around the stator and generally comprises a rotating shaft, a rotor yoke part fixedly arranged on the rotating shaft and a plurality of permanent magnets fixed on the rotor yoke part to form a rotor magnetic field, the rotor magnetic field and the rotating magnetic field of the stator winding act to enable the rotor to generate rotating motion, and the control aspect is controlled by a circuit board which is sleeved on the rotating shaft and is electrically connected with the stator winding.

In order to prevent the circuit board from being damaged, a method of directly fixing the circuit board at a position to be mounted is not generally adopted, so that a base is usually arranged on the circuit board and is fixedly connected with the position to be mounted so as to fix a stator part of the brushless motor, and therefore when the brushless motor works, a stator winding is not moved and a rotor drives a rotating shaft to rotate. The base and the circuit board are integrally arranged, the part of the circuit board, which corresponds to the outside of the base, is used for welding electronic elements, and the position of the circuit board, which corresponds to the base, cannot be used for welding the electronic elements, so that the circuit board with a large area can be used for welding redundant electronic elements, the size of the manufactured brushless motor is large, and the production cost is increased.

SUMMERY OF THE UTILITY MODEL

The utility model mainly aims at providing a compact brushless motor aims at reducing current brushless motor's volume in order to reduce manufacturing cost.

In order to achieve the above object, the utility model provides a compact brushless motor, include the stator and rotate the rotor of being connected with the stator, the stator includes frame and stator core, the rotor includes rotor yoke portion and locates magnet ring and pivot in the rotor yoke portion, the middle part of frame is equipped with the sleeve pipe, the cover has the circuit board in proper order on the sheathed tube outer wall with stator core, but the sleeve pipe is established through first bearing pivot cover in the pivot, but the frame is close to one side of circuit board and has a plurality of convex parts, a plurality of the convex part with circuit board fixed connection makes the circuit board be fixed in the frame when, exists the space that can hold the electronic component on the circuit board between frame and the circuit board, the sheathed tube outer wall is equipped with spacing, stator core corresponds spacing position is equipped with the spacing groove.

The utility model discloses technical scheme has set up a plurality of convex parts in one side that the frame is close to the circuit board and has come with circuit board fixed connection, and the height of convex part makes the circuit board be fixed in after the frame, has certain accommodation space between circuit board and the frame, holds the electronic component on the circuit board, has effectively reduced the circuit board area, compares with traditional brushless motor, and power is the same, but the volume is littleer, has reduced manufacturing cost, and little volume's brushless motor is also more convenient in the aspect of the installation. In addition, the positions of the outer wall of the sleeve and the position of the stator core corresponding to the sleeve are respectively provided with a mutually matched limiting strip and a limiting groove, so that the sleeve can better limit the stator core.

Drawings

Fig. 1 is a perspective view of the present invention;

fig. 2 is a side view of the present invention;

fig. 3 is an exploded view of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that, if directional indicators (such as … …, upper, lower, left, right, front, back, top, bottom, inner, outer, vertical, horizontal, longitudinal, counterclockwise, clockwise, circumferential, radial, axial) are involved in the embodiments of the present invention, the directional indicators are only used to explain the relative position, motion, etc. of the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicators are changed accordingly.

In addition, if there is a description relating to "first" or "second", etc. in the embodiments of the present invention, the description of "first" or "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

The utility model provides a compact brushless motor.

In the embodiment of the present invention, as shown in fig. 1 to 3, the compact brushless motor includes a stator and a rotor rotatably connected to the stator, the stator comprises a base 2 and a stator core 5, the rotor comprises a rotor yoke part 1, a magnet ring and a rotating shaft 3 which are arranged in the rotor yoke part 1, a sleeve 21 is arranged in the middle of the base 2, a circuit board 4 and the stator core 5 are sequentially sleeved on the outer wall of the sleeve 21, the sleeve 21 is pivotally sleeved on the rotating shaft 3 through a first bearing 6, a plurality of convex parts 221 protrude from one side of the base 2 close to the circuit board 4, the plurality of convex parts 221 are fixedly connected with the circuit board 4, so that when the circuit board 4 is fixed on the base 2, a space for accommodating electronic components on the circuit board 4 is present between the housing 2 and the circuit board 4, the outer wall of the sleeve 21 is provided with a limiting strip 212, and a limiting groove 51 is formed in the position of the stator core 5 corresponding to the limiting strip 212.

The utility model discloses a one side that is close to circuit board 4 at frame 2 has set up a plurality of convex parts 221 and has come with circuit board 4 fixed connection, the height of convex part 221 makes circuit board 4 be fixed in after frame 2, certain accommodation space has between circuit board 4 and the frame 2, hold the electronic component on the circuit board 4, circuit board 4 area has effectively been reduced, compare with traditional brushless motor, power is the same, but the volume is littleer, and manufacturing cost is reduced, and small size brushless motor is also more convenient in the aspect of the installation. In addition, the outer wall of the sleeve 21 and the position of the stator core 5 corresponding to the sleeve 21 are respectively provided with a mutually matched limiting strip 212 and a limiting groove 51, so that the sleeve 21 can better limit the stator core 5.

Specifically, the base 2 and the sleeve 21 are integrally formed, a plurality of fan-shaped clamping portions 22 extend from the peripheral wall of the base 2 at equal intervals, and clamping grooves matched with the clamping portions 22 can be formed in positions to be mounted, so that the base 2 is further locked.

Further, the protruding portions 221 are correspondingly located on the bottom wall of the locking portion 22, and one protruding portion 221 is correspondingly disposed on the bottom wall of each locking portion 22.

Further, the fastening portion 22 is provided with a screw hole 222, so that the base 2 can be locked at a position to be installed by a screw.

Specifically, the convex portion 221 and the circuit board 4 are locked by a screw.

Specifically, a reinforcing portion 211 fixedly connected to the protrusion 221 is disposed at a position of the outer wall of the sleeve 21 corresponding to the protrusion 221, so as to reinforce the supporting force of the protrusion 221.

Specifically, the sleeve 21 is stepped to support the first bearing 6, so that the installation is facilitated.

Specifically, a second bearing (not shown) is further disposed inside the rotor yoke 1 and sleeved on the rotating shaft 3, and a position of a peripheral wall of the second bearing (not shown) corresponding to the position of the limiting groove 51 is provided with a limiting key (not shown) to further ensure smooth rotation of the rotor.

The above only be the preferred embodiment of the utility model discloses a not consequently restriction the utility model discloses a patent range, all are in the utility model discloses a conceive, utilize the equivalent structure transform of what the content was done in the description and the attached drawing, or direct/indirect application all is included in other relevant technical field the utility model discloses a patent protection within range.

Claims

1. The utility model provides a compact brushless motor, includes the stator and rotates the rotor of being connected with the stator, the stator includes frame (2) and stator core (5), the rotor includes rotor yoke portion (1) and locates magnet ring and pivot (3) in rotor yoke portion (1), the middle part of frame (2) is equipped with sleeve pipe (21), the cover has circuit board (4) and stator core (5) in proper order on the outer wall of sleeve pipe (21), but sleeve pipe (21) pivot cover is established through first bearing (6) on pivot (3), its characterized in that: frame (2) are close to one side of circuit board (4) and are protrudingly had a plurality of convex parts (221), and are a plurality of convex part (221) with circuit board (4) fixed connection when making circuit board (4) be fixed in frame (2), has the space that can hold electronic component on circuit board (4) between frame (2) and circuit board (4), the outer wall of sleeve pipe (21) is equipped with spacing (212), stator core (5) correspond the position of spacing (212) is equipped with spacing groove (51).

2. A compact brushless electric machine as recited in claim 1, wherein: the base (2) and the sleeve (21) are integrally formed, and a plurality of fan-shaped clamping parts (22) extend out of the peripheral wall of the base (2) at equal intervals.

3. A compact brushless electric machine as recited in claim 2, wherein: the convex parts (221) are correspondingly positioned on the bottom wall of the clamping part (22), and one convex part (221) is correspondingly arranged on the bottom wall of each clamping part (22).

4. A compact brushless electric machine as recited in claim 3, wherein: the clamping part (22) is provided with a screw hole (222).

5. A compact brushless electric machine as recited in claim 1, wherein: the convex portion (221) and the circuit board (4) are locked by a screw.

6. A compact brushless electric machine as recited in claim 1, wherein: and a reinforcing part (211) fixedly connected with the convex part (221) is arranged at the position, corresponding to the convex part (221), of the outer wall of the sleeve (21).

7. A compact brushless electric machine as recited in claim 1, wherein: the sleeve (21) is stepped and is used for supporting the first bearing (6).

8. A compact brushless electric machine as recited in claim 1, wherein: the rotor yoke portion (1) is internally provided with a second bearing sleeved on the rotating shaft (3), and a limiting key is arranged on the position, corresponding to the limiting groove (51), of the peripheral wall of the second bearing.