阅读说明：本技术 一种bldc电机 (BLDC motor ) 是由 江林飞 孙豪远 汪旭亮 于 2020-07-28 设计创作，主要内容包括：本发明公开了一种BLDC电机,包括定子、转子、前端盖、后端盖、转轴和轴承,所述后端盖包括端面和轴承塞,端面和轴承塞为BMC材料一体成型结构,所述轴承塞处形成凸起,所述轴承塞的凸起形成加厚散热区,所述后端盖的一侧为定转子结构,另一侧设有外端盖,所述外端盖的内部安装芯片电路结构,所述外端盖与后端盖之间构成不封闭的散热结构。此发明的优点是后端盖采用BMC热固性塑料与轴承塞一体成型,并且轴承塞处形成加厚散热区,具有通用性强、降噪音、降成本、增加强度、稳定性好的优点,加厚散热区使得散热面积加大,增加轴承的散热；后背式驱动一体的结构有利于电机的芯片电路结构的维修,外端盖与后端盖不封闭的散热结构有利于芯片电路结构的散热。(The invention discloses a BLDC motor, which comprises a stator, a rotor, a front end cover, a rear end cover, a rotating shaft and a bearing, wherein the rear end cover comprises an end face and a bearing plug, the end face and the bearing plug are of a BMC (bulk molding compound) material integrated structure, a bulge is formed at the bearing plug, the bulge of the bearing plug forms a thickened heat dissipation area, one side of the rear end cover is of a stator-rotor structure, the other side of the rear end cover is provided with an outer end cover, a chip circuit structure is arranged in the outer end cover, and a non-closed heat dissipation structure is formed between the outer end cover and the rear end cover. The bearing has the advantages that the rear end cover is integrally formed with the bearing plug by adopting BMC (bulk molding compound) thermosetting plastic, the thickened heat dissipation area is formed at the bearing plug, and the bearing has the advantages of strong universality, noise reduction, cost reduction, strength increase and good stability; the back type driving integrated structure is favorable for maintaining a chip circuit structure of the motor, and the heat dissipation structure with the outer end cover and the back end cover not closed is favorable for dissipating heat of the chip circuit structure.)

1. The utility model provides a BLDC motor, includes stator (4), rotor, front end housing (3), rear end housing (2), pivot (1) and bearing (16), its characterized in that, rear end housing (2) are including terminal surface and bearing stopper, and terminal surface and bearing stopper are BMC material integrated into one piece structure, bearing stopper department forms protrudingly, the arch of bearing stopper forms thickening heat dissipation area (10), one side of rear end housing (2) is for deciding the rotor structure, and the opposite side is equipped with outer end cover (5), internally mounted chip circuit structure (14) of outer end cover (5), constitute unclosed heat radiation structure between outer end cover (5) and rear end housing (2).

2. A BLDC motor according to claim 1, characterised in that the raised thickened heat sink area (10) is truncated-cone-shaped.

3. The BLDC motor according to claim 1, wherein an inner small cover (6) is arranged inside the bearing plug on the rear end cover (2), a clamping groove is formed at one end of the inner small cover (6), the inner small cover (6) is mounted on the rear end cover (2) through the clamping groove, a through hole is formed in the middle of the inner small cover (6), and the bearing (16) is in contact with the bearing (16) of the rear end cover (2) through the through hole of the inner small cover (6).

4. A BLDC motor according to claim 1, characterized in that the two supporting feet (7) of one side of the rear cover (2) are internally provided with first reinforcing ribs (8) which form a cross structure.

5. The BLDC motor according to claim 1, wherein the rear end cap (2) is provided with a plurality of positioning posts (9), the number of the positioning posts (9) of the rear end cap (2) is four, the outer end cap (5) is provided with positioning post mounting connectors (11) at positions corresponding to the positioning posts (9) of the rear end cap (2), and the positioning posts (9) are inserted into the positioning post mounting connectors (11) for mounting.

6. A BLDC motor according to claim 1, wherein said outer end cap (5) is an open end cap structure made of PP, and both sides of said outer end cap (5) are U-shaped.

7. A BLDC motor according to claim 6, wherein the inner part of the outer end cap (5) is provided with a heat sink (13), the outer part of the outer end cap (5) is provided with a plurality of second reinforcing ribs (12), and the second reinforcing ribs (12) are arranged crosswise.

8. A BLDC motor according to claim 1, wherein the outer end cap (5) is also an open end cap structure made of aluminum.

9. A BLDC motor as claimed in claim 5, wherein the positioning post mounting connector (11) is provided with a third reinforcing rib (15) at the lower part thereof, and the third reinforcing rib (15) is comb-shaped.

Technical Field

The present invention relates to a motor, and more particularly, to a BLDC motor.

Background

BLDC, a brushless dc motor, overcomes the congenital deficiencies of brushed dc motors, replacing mechanical commutators with electronic commutators. In the prior art, most of the rear end covers of motors are made of metal, the bearings need to be in contact with the rear end covers, in the operation process of the motors, friction is generated between the continuously operated bearings and the rear end covers to generate noise, and the bearings generate a large amount of heat in operation, the motor bearings generate heat to cause motor faults, lubricating grease is diluted and released lightly, the bearings are damaged seriously, and therefore the contact between the bearings and the rear end covers of the BLDC motors generates noise and the operation of the bearings generates a large amount of heat to cause the motor faults to be urgently solved in the prior art.

Disclosure of Invention

The invention provides a BLDC motor, aiming at solving the problems that noise is generated by contact between a bearing and a rear end cover of the BLDC motor and the motor is in failure caused by a large amount of heat generated by the running of the bearing.

The technical scheme adopted by the invention is as follows:

the utility model provides a BLDC motor, includes stator, rotor, front end housing, rear end housing, pivot and bearing, the rear end housing includes terminal surface and bearing stopper, and terminal surface and bearing stopper are BMC material integrated into one piece structure, bearing stopper department forms the arch, the arch of bearing stopper forms thickening heat dissipation district, one side of rear end housing is the stator-rotor structure, and the opposite side is equipped with outer end cover, the internally mounted chip circuit structure of outer end cover, constitute unclosed heat radiation structure between outer end cover and the rear end housing. The rear end cover of the BLDC motor is integrally formed by BMC (bulk molding compound) thermosetting plastic and the bearing plug, and a thickened heat dissipation area is formed at the bearing plug, so that the BLDC motor has the advantages of strong universality, noise reduction, cost reduction, strength increase and good stability, and is different from a metal rear end cover in the prior art, the thickened heat dissipation area increases the heat dissipation area and increases the heat dissipation of a bearing; the back type driving integrated structure is favorable for maintaining a chip circuit structure of the motor, and the heat dissipation structure with the outer end cover and the back end cover not closed is favorable for dissipating heat of the chip circuit structure. The formed bulge wraps the bearing to reduce noise and has good heat dissipation performance.

Furthermore, the raised thickened heat dissipation area is in a circular truncated cone shape. The inclined angle of the thickened heat dissipation area in the shape of the circular truncated cone is favorable for demoulding of the mould.

Furthermore, an inner small cover is arranged inside the bearing plug on the rear end cover, a clamping groove is formed in one end of the inner small cover, the inner small cover is installed on the rear end cover through the clamping groove, a through hole is formed in the middle of the inner small cover, and the bearing penetrates through the through hole of the inner small cover to be in contact with the bearing of the rear end cover. When the bearing operates, if no inner small cover directly contacts with the rear end cover made of BMC, the rear end cover is abraded.

Furthermore, first reinforcing ribs are arranged inside the two supporting legs on one side of the rear end cover, and the reinforcing ribs form a cross structure. The reinforcing ribs with the cross structures increase the strength of the supporting legs.

Furthermore, the rear end cover is provided with a plurality of positioning columns, the number of the positioning columns of the rear end cover is four, positioning column mounting and connecting pieces are arranged at positions of the outer end cover corresponding to the positioning columns of the rear end cover, and the positioning columns are inserted into the positioning column mounting and connecting pieces for mounting. The design of reference column is favorable to the installation of outer end cover, and the alignment position that can be rapid to make be connected with the space between outer end cover and the rear end cap and be favorable to the heat dissipation.

Further, the outer end cover is an open end cover structure made of PP, and two sides of the outer end cover are U-shaped. The outer end cover needs to be small in wall thickness ratio and thin in structure, and the PP material has the advantages of being good in toughness and low in cost. The U-shaped structural design increases the contact between the chip circuit structure and the outside air, and increases the heat dissipation.

Furthermore, a radiator is arranged inside the outer end cover, a plurality of second reinforcing ribs are arranged outside the outer end cover, and the second reinforcing ribs are arranged in a transverse-vertical crossing mode. The outer end cover made of PP cannot radiate heat well, a radiator is needed to increase radiating, and reinforcing ribs outside the outer end cover enhance the strength of the outer end cover.

Further, the outer end cap may also be an open-type end cap structure made of aluminum. The aluminum outer end cover has good heat dissipation performance, and a radiator is not needed for auxiliary heat dissipation.

Furthermore, a third reinforcing rib is arranged at the lower part of the positioning column mounting connecting piece, and the third reinforcing rib is in a comb shape. The third strengthening rib increases the intensity of reference column installation connecting piece.

The invention has the following beneficial effects: the rear end cover of the BLDC motor is integrally formed by BMC (bulk molding compound) thermosetting plastic and the bearing plug, and a thickened heat dissipation area is formed at the bearing plug, so that the BLDC motor has the advantages of strong universality, noise reduction, cost reduction, strength increase and good stability, and is different from a metal rear end cover in the prior art, the thickened heat dissipation area increases the heat dissipation area and increases the heat dissipation of a bearing; the back type driving integrated structure is beneficial to the maintenance of a chip circuit structure of the motor, and the heat dissipation structure with the outer end cover and the back end cover not closed is beneficial to the heat dissipation of the chip circuit structure; the design of the positioning column is beneficial to the installation of the outer end cover, the position can be quickly found, and a gap connected between the outer end cover and the rear end cover is beneficial to heat dissipation; the outer end cover needs to be small in wall thickness ratio and thin in structure, and the PP material has the advantages of good toughness and low cost; the outer end cover can also adopt an aluminum outer end cover, and the aluminum outer end cover has good heat dissipation performance and does not need a radiator for auxiliary heat dissipation; the inclined angle of the thickened heat dissipation area in the shape of the circular truncated cone is favorable for demoulding of the mould.

Drawings

FIG. 1 is a schematic diagram of the structure of the apparatus of the present invention;

FIG. 2 is a schematic structural view of the rear end cap;

FIG. 3 is another isometric view of FIG. 2;

FIG. 4 is a schematic structural view of an outer end cap;

fig. 5 is a bottom view of fig. 4.

In the figure, 1 is a rotating shaft, 2 is a rear end cover, 3 is a front end cover, 4 is a stator, 5 is an outer end cover, 6 is an inner small cover, 7 is a supporting leg, 8 is a first reinforcing rib, 9 is a positioning column, 10 is a thickened heat dissipation area, 11 is a positioning column mounting connector, 12 is a second reinforcing rib, 13 is a radiator, 14 is a chip circuit structure, 15 is a third reinforcing rib, and 16 is a bearing.

Detailed Description

The invention is explained in detail below with reference to the figures and examples.