CN218301028U

CN218301028U - Sealed brushless external rotor motor

Info

Publication number: CN218301028U
Application number: CN202222229238.4U
Authority: CN
Inventors: 唐祥; 袁心芝
Original assignee: Shenzhen Topbond Motor Co ltd
Current assignee: Shenzhen Topbond Motor Co ltd
Priority date: 2022-08-23
Filing date: 2022-08-23
Publication date: 2023-01-13
Anticipated expiration: 2032-08-23

Abstract

The utility model provides a sealed brushless external rotor motor, including stator module, rotor subassembly, protection casing, waterproof wire, cover sealing member, the sealing member of being qualified for the next round of competitions and shaft seal spare, the stator module includes the stator seat and establishes the armature on the stator seat, the rotor subassembly includes the main part and connects the pivot of main part, is equipped with the shaft seal spare and forms sealedly between pivot and the shaft hole; the shield sealing element is arranged between the shield and the stator seat to form sealing; the waterproof wire is electrically connected with the internal circuit of the motor and penetrates through the wire outlet hole to extend outwards. The sealed brushless outer rotor motor can isolate external solid, dust and water from the rotor to contact with the inside of the motor, thereby realizing the waterproof and dustproof functions and being suitable for splashing and water spraying environments.

Description

Sealed brushless external rotor motor

Technical Field

The utility model belongs to the technical field of the motor and specifically relates to a sealed brushless external rotor electric machine is related to.

Background

The traditional sealing structure is an inner rotor motor, in the brushless direct current motor, the rotor inertia, the output torque and the output power ratio of the inner rotor structure motor are lower, the rotor inertia, the output torque and the output power ratio of the outer rotor structure motor are higher, the rotational inertia of the outer rotor is large, stable-speed operation is facilitated, and the characteristic parameters of the outer rotor motor are superior to those of the inner rotor motor under certain conditions, so that the outer rotor motor has advantages and competitiveness relatively. If the inner rotor motor is suspected for sealing performance, it means that a compromise is made in terms of motor performance.

The existing brushless outer rotor motor is poor in sealing performance and comprises two parts, namely a stator assembly and a rotor assembly, a rotor is exposed and leaked to rotate in the air, a large gap is reserved between the stator assembly and the rotor assembly, the rotor assembly comprises a rotating shaft and a front end cover connected with the rotating shaft, the front end cover is provided with fan blades, the fan blades are provided with a plurality of ventilation openings, and the motor is free of a sealing structure. Inside solid, dust, water can get into the motor, water can cause the motor phase line short circuit, and the solid then leads to motor rotor subassembly and stator module to take place the friction, leads to the motor to damage, can't satisfy there be solid, dust, waterproof environment operation requirement, and application occasion and scope are limited.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model lies in, to the above-mentioned defect in the correlation technique, provide a sealed brushless external rotor electric machine.

The utility model provides a technical scheme that its technical problem adopted includes: the sealed brushless outer rotor motor comprises a stator assembly, a rotor assembly, a protective cover, a waterproof wire, a cover sealing element, a wire outlet sealing element and a shaft sealing element, wherein the stator assembly comprises a stator seat and an armature arranged on the stator seat; the protective cover is provided with a cavity with one side open, the armature and the rotor assembly are arranged in the cavity, the opening of the protective cover is connected with the stator seat, and the cover sealing element is arranged between the protective cover and the stator seat and forms sealing; the protective cover is provided with a wire outlet, the wire outlet sealing element is provided with a wire outlet hole, the wire outlet sealing element is arranged in the wire outlet hole in a matching mode, the waterproof wire is electrically connected with an internal circuit of the motor and penetrates through the wire outlet hole to extend outwards, and the wire outlet sealing element enables the wire outlet hole and the waterproof wire to form sealing.

Preferably, one side of the stator seat facing the protective cover is provided with a sealing piece groove extending in the circumferential direction, the cover sealing piece is a sealing ring and is arranged in the sealing piece groove, and the protective cover compresses the cover sealing piece.

Preferably, the protective cover comprises an end wall arranged on one axial side of the rotor assembly, a circumferentially surrounding side wall connected with the end wall, and a connecting part connected with the side wall, the end wall and the side wall define the cavity, and the brushless outer rotor motor comprises a connecting part which connects the connecting part with the stator seat.

Preferably, a sealing groove is arranged on the outlet sealing element, and the edge of the outlet is embedded into the sealing groove in a matching manner.

Preferably, the outlet extends to the edge of the cavity and forms a notch, and the outlet seal is installed into the outlet from the notch along the extending direction of the sealing groove.

Preferably, the part of the outlet sealing element at the notch presses the stator seat, so that sealing is formed between the outlet sealing element and the stator seat.

Preferably, the stator assembly includes a bearing provided on the stator holder to be fitted with the rotating shaft, and the shaft seal is provided axially outside the bearing.

Preferably, the shaft sealing element is an oil seal sleeved on the rotating shaft.

Preferably, the waterproof wire comprises a wire and a waterproof outer layer coated outside the wire.

Preferably, the waterproof wire is a phase line of the brushless outer rotor motor.

Implement the technical scheme of the utility model, following beneficial effect has at least: the sealed brushless outer rotor motor can isolate external solid, dust and water from the rotor to contact with the inside of the motor, thereby realizing the waterproof and dustproof functions and being suitable for splashing and water spraying environments.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.

Fig. 1 is a perspective view of a sealed brushless external rotor motor according to an embodiment of the present invention.

Fig. 2 is a perspective view of the sealed brushless outer rotor motor of fig. 1.

Fig. 3 is an exploded view of the sealed brushless outer rotor motor of fig. 1.

Fig. 4 is an exploded view of the sealed brushless outer rotor motor of fig. 1.

Fig. 5 is a partially enlarged view of a portion a of fig. 4.

Fig. 6 is a perspective cross-sectional view of the sealed brushless outer rotor motor of fig. 1, taken along an axial direction.

The reference numerals in the figures denote: stator module 1, stator seat 11, shaft hole 111, seal groove 112, armature 12, bearing 13, rotor module 2, main body 21, rotating shaft 22, protective cover 3, cavity 31, outlet 32, notch 33, end wall 3a, side wall 3b, connecting portion 3c, waterproof wire 4, cover seal 51, outlet seal 52, outlet hole 511, seal groove 521, shaft seal 53, connecting member 6.

Detailed Description

In order to clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be understood that if the description herein refers to orientations and positional relationships, such orientations and positional relationships are to be construed in a specific manner, based on the orientation or positional relationship shown in the drawings, this is for convenience in describing the present disclosure, and does not refer to the device or component being referred to, which should not be construed as limiting the present disclosure. It is also to be understood that, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," "disposed," and the like, if used herein, are intended to be inclusive, e.g., that they may be fixedly connected, detachably connected, or integrally formed; either directly or indirectly through intervening media, either internally or in any other relationship. When an element is referred to as being "on" or "under" another element, it can be "directly" or "indirectly" on the other element or intervening elements may also be present.

In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.

Referring to fig. 1 to 6, the sealed brushless external rotor motor according to an embodiment of the present invention includes a stator assembly 1, a rotor assembly 2, a protective cover 3, a waterproof wire 4, a cover sealing member 51, an outgoing line sealing member 52, and a shaft sealing member 53, wherein the stator assembly 1 includes a stator seat 11 and an armature 12 disposed on the stator seat 11, the rotor assembly 2 includes a main body portion 21 and a rotating shaft 22 connected to the main body portion 21, the stator seat 11 is provided with a shaft hole 111, the rotating shaft 22 is inserted into the shaft hole 111, the shaft sealing member 53 is disposed between the rotating shaft 22 and the shaft hole 111, and a seal is formed between the rotating shaft 22 and the shaft hole 111; the protective cover 3 is provided with a cavity 31 which is opened towards one side, the armature 12 and the rotor assembly 2 are arranged in the cavity 31, the opening of the protective cover 3 is connected with the stator seat 11, and the cover sealing member 51 is arranged between the edge of the opening of the protective cover 3 and the stator seat 11 and enables the cover sealing member 51 and the stator seat 11 to form sealing; the protective cover 3 is provided with an outlet 32, the outlet sealing element 52 is provided with an outlet hole 511, the outlet sealing element 52 is arranged in the outlet 32 in a matching manner, the waterproof wire 4 is electrically connected with the internal circuit of the motor and extends outwards through the outlet hole 511, and the outlet sealing element 52 enables the outlet 32 and the waterproof wire 4 to form sealing.

Wherein, the protective cover 3 is used for isolating the contact of external solid, dust and water with the rotor; the can seal 51 serves to prevent external dust and water from penetrating into the interior of the motor from between the protection cover 3 and the stator holder 11.

The traditional sealing protection structure is designed for an inner rotor motor. The utility model discloses a sealed brushless external rotor electric machine can completely cut off outside solid, dust and water and rotor and motor internal contact, realizes waterproof dustproof function, is applicable to splash, the environment of spraying water, can satisfy the protection of IP65 level (remark: IP65 protection grade standard details see international electrotechnical commission standard IEC 60529), has widened the service environment and the operating mode of brushless outer rotor electric machine, has satisfied the multi-environment multiplex condition occasion operation requirement, has promoted brushless external rotor electric machine product competitiveness.

Preferably, a circumferentially extending sealing element groove 112 corresponding to the opening edge of the cavity 31 of the shield 3 is formed in one side of the stator seat 11 facing the shield 3, the shield sealing element 51 is a sealing ring, which may be an O-ring with an O-shaped cross section or a square sealing ring with a square cross section, and is arranged in the sealing element groove 112, and the shield 3 is connected with the stator seat 11 through the connecting element 6 and presses the shield sealing element 51 to realize sealing; among them, the cover seal 51 may be a rubber seal.

Preferably, the protective cover 3 comprises an end wall 3a arranged on one side of the rotor assembly 2 in the axial direction, a side wall 3b connected with the end wall 3a and circumferentially surrounding the periphery of the rotor assembly 2, and a circumferentially surrounding and radially outwardly extending connecting part 3c connected with the side wall 3b, the end wall 3a and the side wall 3b define a cavity 31, the brushless outer rotor motor comprises a connecting part 6, and the connecting part 6 is used for connecting the connecting part 3c with the stator seat 11 to realize the connection of the protective cover 3 with the stator seat 11, so that the protective cover 3 is pressed against the cover sealing part 51.

Preferably, a sealing groove 521 is arranged on the edge of the outlet seal 52, and the edge of the outlet 32 is matched and embedded in the sealing groove 521, so as to realize sealing between the outlet seal 52 and the outlet 32.

Preferably, the outlet 32 extends to the edge of the cavity 31 and forms a notch 33, and the outlet seal 52 is installed into the outlet 32 from the notch 33 along the extending direction of the sealing groove 521.

Preferably, the portion of the wire outlet seal 52 at the gap 33 presses against the stator seat 11, such that a seal is formed between the wire outlet seal 52 and the stator seat 11.

Preferably, the rotating shaft 22 includes an extending end extending out of the stator seat 11, the stator assembly 1 includes a bearing 13 disposed on the stator seat 11 and engaged with the rotating shaft 22, a shaft seal 53 is disposed axially outside the bearing 13, the shaft seal 53 protects moving parts of the motor, creates a closed area for internal operation of the motor, and achieves a sealing effect of the extending end.

Preferably, the shaft seal 53 is an oil seal that fits over the shaft 22.

Preferably, the waterproof wire 4 itself has sealability and includes a wire and a waterproof outer layer covering the wire and having waterproofness.

Preferably, the waterproof wire 4 is a phase line of the brushless external rotor motor; waterproof wire 4 is worn out outside the guard shield from outlet hole 511 of outlet sealing member 52, and waterproof wire 4 closely cooperates with outlet sealing member 52, has solved the leakproofness problem of motor phase line outlet end.

This brushless external rotor electric machine of sealed can completely cut off outside solid, dust and water and rotor and motor internal contact, realizes waterproof dustproof function, can satisfy the protection of IP65 grade, has widened the service environment and the operating mode of brushless outer rotor electric machine, has satisfied multi-environment multiplex condition occasion operation requirement, has promoted brushless external rotor electric machine product competitiveness.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not intended to limit the present invention, which may be modified, combined, and varied by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims

1. The sealed brushless outer rotor motor is characterized by comprising a stator assembly (1), a rotor assembly (2), a protective cover (3), a waterproof wire (4), a cover sealing element (51), an outlet sealing element (52) and a shaft sealing element (53), wherein the stator assembly (1) comprises a stator seat (11) and an armature (12) arranged on the stator seat (11), the rotor assembly (2) comprises a main body part (21) and a rotating shaft (22) connected with the main body part (21), a shaft hole (111) is formed in the stator seat (11), the rotating shaft (22) is arranged in the shaft hole (111) in a penetrating mode, and the shaft sealing element (53) is arranged between the rotating shaft (22) and the shaft hole (111) to form sealing; the protective cover (3) is provided with a cavity (31) which is opened towards one side, the armature (12) and the rotor assembly (2) are arranged in the cavity (31), the opening of the protective cover (3) is connected with the stator seat (11), and the cover sealing element (51) is arranged between the protective cover (3) and the stator seat (11) and forms sealing; be equipped with outlet (32) on protection casing (3), be equipped with wire hole (511) on outlet sealing member (52), outlet sealing member (52) cooperation is established in outlet (32), waterproof wire (4) electric connection motor internal circuit passes wire hole (511) outwards stretches out, outlet sealing member (52) make outlet (32) with form sealedly between waterproof wire (4).

2. The brushless external rotor motor according to claim 1, wherein a circumferentially extending seal groove (112) is provided on a side of the stator base (11) facing the shield (3), the shield seal (51) is a sealing ring, and is provided in the seal groove (112), and the shield (3) presses the shield seal (51).

3. The brushless external rotor motor according to claim 2, wherein the protective cover (3) comprises an end wall (3 a) disposed on one axial side of the rotor assembly (2), a circumferentially surrounding side wall (3 b) connected to the end wall (3 a), and a connecting portion (3 c) connected to the side wall (3 b), the end wall (3 a) and the side wall (3 b) defining the cavity (31), and the brushless external rotor motor comprises a connecting member (6), and the connecting portion (3 c) is connected to the stator base (11) by the connecting member (6).

4. The brushless external rotor motor according to claim 1, wherein a sealing groove (521) is formed in the outlet seal (52), and an edge of the outlet (32) is embedded in the sealing groove (521) in a matching manner.

5. The brushless external rotor motor according to claim 4, wherein the outlet (32) extends to an edge of the cavity (31) and forms a notch (33), and the outlet seal (52) is installed into the outlet (32) from the notch (33) along an extending direction of the sealing groove (521).

6. The brushless external rotor motor according to claim 5, wherein a portion of the outlet seal (52) at the gap (33) presses against the stator base (11) to seal between the outlet seal (52) and the stator base (11).

7. The brushless external rotor electric machine according to claim 1, wherein the stator assembly (1) comprises a bearing (13) provided on the stator seat (11) to cooperate with the rotating shaft (22), the shaft seal (53) being provided axially outside the bearing (13).

8. The brushless external rotor electric machine according to claim 1, wherein the shaft seal (53) is an oil seal fitted over the rotation shaft (22).

9. The brushless external rotor electric machine according to claim 1, wherein the waterproof wire (4) comprises a wire and a waterproof outer layer covering the wire.

10. The brushless external rotor electric machine according to claim 9, wherein the waterproof wire (4) is a phase wire of the brushless external rotor electric machine.