CN216904496U - Brushless motor and rotor and casing subassembly thereof - Google Patents

Abstract

The utility model relates to a brushless motor and a rotor and a shell assembly thereof, wherein the shell assembly comprises a cylindrical shell with one end arranged at an opening, an end cover arranged at one end of the shell far away from the opening, and a shaft sleeve which is arranged on the end cover and is used for being matched with a rotating shaft of the rotor; the end cover is an injection molding piece, and the shell, the end cover and the shaft sleeve form an integrated structure through injection molding; and the end cover is provided with a positioning structure which can penetrate into the casing and is used for positioning the magnetic steel of the rotor. This casing subassembly is through adopting the injection molding as the end cover to form an organic whole structure with this casing, end cover and axle sleeve through moulding plastics, and set up location structure on this end cover and lie in this casing, thereby reduce the part, simplify the production processes of rotor, reduction in production cost improves the precision, provides reliability and product competitiveness.

Description

Brushless motor and rotor and casing subassembly thereof

Technical Field

The present invention relates to motors, and more particularly, to a brushless motor and a rotor and housing assembly thereof.

Background

In brushless motor's among the correlation technique rotor, casing and end cover are metal parts, and are two independent structures to still need additionally to set up the fixed magnet steel of magnet steel fixed knot structure in this casing, thereby lead to this rotor production loaded down with trivial details, manufacturing cost is high and the reliability is poor.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an improved casing assembly, and further provides an improved rotor and a brushless motor.

The technical scheme adopted by the utility model for solving the technical problems is as follows: constructing a shell assembly, which comprises a shell, an end cover and a shaft sleeve, wherein one end of the shell is arranged in an opening and is cylindrical, the end cover is arranged at one end of the shell, which is far away from the opening, and the shaft sleeve is arranged on the end cover and is used for being matched with a rotating shaft of a rotor;

the end cover is an injection molding piece, and the shell, the end cover and the shaft sleeve form an integrated structure through injection molding;

and the end cover is provided with a positioning structure which can penetrate into the shell and is used for positioning the magnetic steel of the rotor.

Preferably, the end cover comprises a cover body and a positioning sleeve arranged on the cover body and used for wrapping the periphery of the shaft sleeve;

the cover body is arranged at one end of the shell far away from the opening;

the positioning sleeve is positioned at the middle shaft of the cover body;

the positioning structure is arranged on the cover body and is positioned on the periphery of the positioning sleeve.

Preferably, the cover body, the positioning sleeve and the positioning structure are of an integral structure.

Preferably, the positioning structure comprises a plurality of positioning grooves which are correspondingly arranged with the magnetic steels one by one.

Preferably, the positioning structure comprises an annular body and a plurality of bosses arranged on the annular body at intervals, and the interval between two adjacent bosses forms the positioning groove.

Preferably, the shaft sleeve comprises a sleeve body and an annular flange arranged at one end of the sleeve body and matched with the positioning sleeve;

the outer side wall of the sleeve body is provided with a first concave-convex structure matched with the positioning sleeve.

Preferably, the inner side wall of the positioning sleeve is provided with a second concave-convex structure matched with the first concave-convex structure.

Preferably, the casing includes a cylindrical body, an outer ring disposed at one end of the cylindrical body, an inner ring disposed in the outer ring, and a plurality of connecting arms disposed at intervals along a circumferential direction of the cylindrical body and respectively connected to the outer ring and the inner ring.

The utility model also constructs a rotor, which comprises the shell component, a rotating shaft with two ends penetrating out of the shell component, and a plurality of magnetic steels which are arranged in the shell of the shell component at intervals along the circumferential direction of the shell component and are arranged on the positioning structure of the shell component;

the shaft sleeve of the shell component is sleeved on the rotating shaft.

The utility model also constructs a brushless motor, which comprises the rotor and a stator matched with the rotor.

The brushless motor and the rotor and shell assembly thereof have the following beneficial effects: this casing subassembly is through adopting the injection molding as the end cover to form an organic whole structure with this casing, end cover and axle sleeve through moulding plastics, and set up location structure on this end cover and lie in this casing, thereby reduce the part, simplify the production processes of rotor, reduction in production cost improves the precision, provides reliability and product competitiveness.

Drawings

The utility model will be further described with reference to the accompanying drawings and examples, in which:

FIG. 1 is a schematic structural view of a housing assembly in a rotor of a brushless electric machine in accordance with some embodiments of the utility model;

FIG. 2 is a cross-sectional view of the enclosure assembly of FIG. 1;

FIG. 3 is a schematic structural view of a housing of the housing assembly of FIG. 1;

FIG. 4 is a schematic structural view of an end cap of the enclosure assembly of FIG. 1;

fig. 5 is a schematic view of the construction of the sleeve of the housing assembly shown in fig. 1.

Detailed Description

For a more clear understanding of the technical features, objects and effects of the present invention, embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

Fig. 1 shows some preferred embodiments of the brushless motor of the present invention. The brushless motor can be used as a driving mechanism for driving an external component to rotate. The brushless motor has the advantages of simple structure, simple and convenient production and low manufacturing cost. In some embodiments, the brushless motor may include a rotor and a stator. The rotor can output power through rotation. The stator can be matched with the rotor to enable the rotor to rotate in the electrified state.

Further, in some embodiments, the rotor may include a housing assembly, a shaft, and a plurality of magnetic steels. The shell component can be sleeved on the periphery of the stator, and two ends of the rotating shaft can respectively penetrate out of two ends of the shell component; the plurality of magnetic steels can be arranged in the shell assembly at intervals along the circumferential direction of the shell assembly and are positioned on the periphery of the rotating shaft. In some embodiments, the magnetic steel may be sheet-like.

Further, as shown in fig. 1 and 2, in some embodiments, the housing assembly may include a housing 10, an end cap 20, and a sleeve 30. The casing 10 may be cylindrical, and an opening 110 may be provided at one end of the casing 10. The end cap 20 can be disposed at an end of the casing 10 away from the opening 110. The shaft sleeve 30 may be disposed on the end cap 20, and may be sleeved on the periphery of the rotating shaft of the rotor to be matched with the rotating shaft.

Further, as shown in fig. 3, in some embodiments, the housing 10 may be a metal drawn part. The casing 10 adopts metal stretching parts to replace metal processing parts, so that the cost can be reduced while the precision is ensured. In some embodiments, the casing 10 may include a cylindrical body 11, an outer ring 12, an inner ring 13, and a connecting arm 14. Further, in some embodiments, the cylindrical body 11 may be cylindrical and have a hollow structure with two ends penetrating, and the opening 110 is disposed at one end of the cylindrical body 11. The outer ring 12 is disposed at the other end of the cylindrical body 11, and specifically, may be located at one end of the cylindrical body 11 away from the opening 110. The outer ring 12 may be located inside the cylindrical body 11, and is connected to the sidewall of the cylindrical body 11 and disposed coaxially with the cylindrical body 11. The inner ring 13 may be disposed coaxially with the outer ring 12 and may be located in the outer ring 12, the connecting arms 14 may be multiple, the connecting arms 14 may be disposed at intervals along the circumferential direction of the inner ring 13, and two ends of each connecting arm are connected to the outer ring 12 and the inner ring 13, respectively. Specifically, in some embodiments, the connecting arms 14 may be three. In some embodiments, the cylindrical body 11, the outer ring 12, the inner ring 13, and the plurality of connecting arms 14 may be integrally formed. The outer ring 12, the inner ring 13, the connecting arm 14 and the like are arranged, so that the connection between the casing 10 and the end cover 20 is more reliable. In some embodiments, the connecting arm 14 may be provided with a screw hole, although it will be appreciated that in other embodiments, the screw hole may be omitted. In some embodiments, the spacing between two adjacent connecting arms 14 may form a vent, although it will be appreciated that in other embodiments, the vent may be omitted.

Further, as shown in fig. 4, in some embodiments, the end cap 20 may be an injection molded part, in particular, in some embodiments, the end cap 20 may be a plastic part, and the end cap 20, the housing 10 and the shaft sleeve 30 may be formed into a unitary structure by injection molding, in particular, they may be formed into a unitary structure by an over-molding process. The end cap 20 can cover the casing 10 and the shaft sleeve 30 to form an integrated structure, so that the production process can be reduced, and the casing 10 and the shaft sleeve 30 have high concentricity.

Further, in some embodiments, the end cap 20 may include a cap body 21, a positioning sleeve 22, and a positioning structure 23. The cover 21 may be located at an end of the casing 10 away from the opening 110, and the cover 21 and the bottom structure of the casing 10 may be formed as an integral structure by injection molding. The positioning sleeve 22 may be disposed on the cover 21, may be located at a central axis of the cover 21, and may be integrally formed with the cover 21. The positioning sleeve 22 has a structure with two through ends, and can be used to cover the outer circumference of the shaft sleeve 30. The positioning sleeve 22 has a hollow structure with two through ends. In some embodiments, the positioning structure 23 may be disposed on the cover 21 and may penetrate into the housing 10, and may be located at the periphery of the positioning sleeve 22. This positioning structure 23 can be used to position the magnetic steel. In some embodiments, the cover 21, the positioning sleeve 22 and the positioning structure 23 may be an integral structure.

Further, in some embodiments, the positioning structure 23 may include an annular body 231 and a plurality of bosses 232. The annular body 231 may be disposed on the cover body 21 and may be integrally formed with the cover body 21, and the annular body 231 may be located on the outer periphery of the positioning sleeve 22. In some embodiments, the outer diameter of the annular body 231 may be adapted to the inner diameter of the casing 10. In some embodiments, the plurality of bosses 232 may be spaced along the circumferential direction of the annular body 231, and may be located at one end of the annular body 231 and protrude along the axial direction of the annular body 231. In some embodiments, the boss 231 may be integrally formed with the annular body 231. Further, in some embodiments, a plurality of positioning slots 233 may be disposed on the positioning structure 23; specifically, in some embodiments, the positioning grooves 233 may be disposed in a one-to-one correspondence with the magnetic steels for the magnetic steels to be mounted in a one-to-one correspondence. In some embodiments, the spacing between two adjacently disposed bosses 232 may form the detent 233.

As shown in fig. 5, further, in some embodiments, the shaft sleeve 30 may be installed in the positioning sleeve 22, in some embodiments, the shaft sleeve 30 may be a metal component, specifically, in some embodiments, the shaft sleeve 30 may be a powder metallurgy or die casting component, the shaft sleeve 30 may include a sleeve body 31 and an annular flange 32, the sleeve body 31 may be cylindrical, and the annular flange 32 may be disposed at one end of the sleeve body 31 and extend radially outward along the sleeve body 31, and may be configured to cooperate with the positioning sleeve 22 to limit the position. In some embodiments, the annular flange 32 may be used to simply strengthen the attachment to the end cap 20. It will be appreciated that in other embodiments, the annular flange 32 may be omitted. In some embodiments, the first concave-convex structure 33 is disposed on the outer side wall of the sheath 31, in some embodiments, the first concave-convex structure 33 may be a plurality of ribs, the plurality of ribs may be strip-shaped ribs, which may extend along the axial direction of the sheath 31, and the plurality of ribs may be spaced apart. In some embodiments, the first relief structure 33 is configured to provide a tight fit between the sleeve 30 and the end cap 20. In some embodiments, the first relief structure may not be limited to being a ridge, which may be a step or otherwise. In some embodiments, the inner wall of the positioning sleeve 22 may be provided with a second concave-convex structure 221 matched with the first concave-convex structure 33, and the second concave-convex structure 221 may be arranged corresponding to the first concave-convex structure 33.

It is to be understood that the foregoing examples, while indicating the preferred embodiments of the utility model, are given by way of illustration and description, and are not to be construed as limiting the scope of the utility model; it should be noted that, for those skilled in the art, the above technical features can be freely combined, and several changes and modifications can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention; therefore, all equivalent changes and modifications made within the scope of the claims of the present invention should be covered by the claims of the present invention.

Claims (10)

1. The machine shell assembly is characterized by comprising a machine shell (10) with one end arranged in an opening (110) and in a cylindrical shape, an end cover (20) arranged at one end, far away from the opening, of the machine shell (10), and a shaft sleeve (30) which is arranged on the end cover (20) and is used for being matched with a rotating shaft of a rotor;

the end cover (20) is an injection molding piece, and the shell (10), the end cover (20) and the shaft sleeve (30) form an integral structure through injection molding;

and a positioning structure (23) capable of penetrating into the shell (10) and used for positioning the magnetic steel of the rotor is arranged on the end cover (20).

2. The housing assembly of claim 1, wherein the end cap (20) includes a cover body (21) and a positioning sleeve (22) disposed on the cover body (21) for covering the outer periphery of the shaft sleeve (30);

the cover body (21) is arranged at one end of the machine shell (10) far away from the opening;

the positioning sleeve (22) is positioned at the central axis of the cover body (21);

the positioning structure (23) is arranged on the cover body (21) and is positioned on the periphery of the positioning sleeve (22).

3. The cabinet assembly according to claim 2, wherein the cover (21) and the positioning sleeve (22) and the positioning structure (23) are an integral structure.

4. The cabinet assembly according to claim 1, wherein the positioning structure (23) comprises a plurality of positioning grooves (233) installed in one-to-one correspondence with the magnetic steels.

5. The cabinet assembly according to claim 4, wherein the positioning structure (23) comprises an annular body (231) and a plurality of bosses (232) spaced from the annular body (231), and the spacing between two adjacent bosses (232) forms the positioning groove (233).

6. The cover assembly of claim 2, wherein the sleeve (30) comprises a sleeve body (31) and an annular flange (32) disposed at one end of the sleeve body (31) and engaged with the positioning sleeve (22);

the outer side wall of the sleeve body (31) is provided with a first concave-convex structure (33) matched with the positioning sleeve (22).

7. The cabinet assembly according to claim 6, wherein the inner side wall of the positioning sleeve (22) is provided with a second relief structure (221) cooperating with the first relief structure (33).

8. The cabinet assembly according to claim 1, wherein the cabinet (10) includes a cylindrical body (11), an outer ring (12) disposed at one end of the cylindrical body (11), an inner ring (13) disposed in the outer ring (12), and a plurality of connecting arms (14) disposed at intervals along a circumferential direction of the cylindrical body (11) and connected to the outer ring (12) and the inner ring (13), respectively.

9. A rotor, comprising the casing assembly of any one of claims 1 to 8, a rotating shaft with two ends penetrating through the casing assembly, and a plurality of magnetic steels arranged in the casing (10) of the casing assembly at intervals along the circumferential direction of the casing assembly and mounted on the positioning structure (23) of the casing assembly;

the shaft sleeve (30) of the shell component is sleeved on the rotating shaft.

10. A brushless motor comprising the rotor of claim 9 and a stator fitted to the rotor.

Images