CN210693585U

CN210693585U - Brushless motor for dust collector

Info

Publication number: CN210693585U
Application number: CN201921958836.7U
Authority: CN
Inventors: 尹凌飞
Original assignee: Suzhou Runhao Motor Co ltd
Current assignee: Suzhou Runhao Motor Co ltd
Priority date: 2019-11-13
Filing date: 2019-11-13
Publication date: 2020-06-05
Anticipated expiration: 2029-11-13

Abstract

The utility model discloses a brushless motor for dust catcher, including upper bracket, lower carriage and stator core, stator core installs on the upper bracket, and upper bracket and lower carriage are located stator core's upper and lower both sides respectively, and upper bracket and lower carriage fixed connection, are provided with resilient pad between the contact surface of lower carriage and stator core, and the terminal surface of upper bracket is laminated mutually with the terminal surface of lower carriage. The utility model discloses an add an elastic gasket between lower carriage and stator core, guarantee the bearing pretightning force for the value of design, vibration and noise when reducing the high-speed operation of motor provide product percent of pass and customer satisfaction.

Description

Brushless motor for dust collector

Technical Field

The utility model relates to a motor especially relates to a brushless motor for dust catcher.

Background

Along with the improvement of the energy consumption standard of the industry of dust collectors and the demand of consumers on the miniaturization of portable dust collectors, the sound requirement of the consumers on the dust collectors is higher and higher, so that how to enable the electric fan of the dust collectors to meet the requirements of small volume and silence and improve efficiency becomes a great technical problem of research in the industry.

Researches find that the vibration and noise generation of the motor have a great relationship with the pretightening force of the bearing, and the proper pretightening force of the bearing can ensure that the motor has small vibration, low noise and long service life.

The structure of the brushless motor for the existing dust collector is that the inner circle of the seam allowance of an upper bracket and a lower bracket is matched with the excircle of a stator core to ensure that the stator and a rotor are concentric, the seam allowance end surfaces of the upper bracket and the lower bracket are matched with the end surface of the stator core, and after the upper bracket and the lower bracket are fastened by screws, a wave-shaped gasket provides pretightening force for a bearing. After the screw is fastened, the end face of the wave washer 70 abuts against the end face of the bearing outer ring, so that the wave washer 70 can provide axial pre-tightening force for the bearing 40 after being compressed, and the value of the pre-tightening force is ensured by the compression amount of the wave washer 70.

But because of stator core's thickness has the tolerance, when the screw fastening back, the thickness of iron core can change, just so causes the axial dimension chain of motor to have the error, can't guarantee that the bearing pretightning force is the value of design to make the motor vibrate occasionally and the noise when high-speed operation, the product percent of pass is low.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome prior art's defect, provide a brushless motor for dust catcher.

In order to achieve the above object, the utility model provides a following technical scheme: the brushless motor for the dust collector comprises an upper support, a lower support and a stator core, wherein the stator core is installed on the upper support, the upper support and the lower support are respectively located on the upper side and the lower side of the stator core, the upper support is fixedly connected with the lower support, an elastic gasket is arranged between the contact surfaces of the lower support and the stator core, and the end surface of the upper support is attached to the end surface of the lower support.

Preferably, the lower bracket comprises a spigot end face, and the elastic gasket is arranged between the spigot end face of the lower bracket and the end face of the stator core.

Preferably, the elastic gasket is a circular gasket.

Preferably, at least one concave groove is arranged on the outer edge of the elastic gasket.

Preferably, the grooves correspond to the positions of the grooves on the stator core.

Preferably, the elastic pad is made of elastic rubber or spring steel.

Preferably, the upper bracket and the lower bracket are fixedly connected through screws.

Preferably, the motor further comprises a bearing disposed in the lower bracket.

Preferably, a bearing chamber is arranged in the lower support, and the bearing is accommodated in the bearing chamber.

Preferably, the motor further comprises a wave washer, and the end face of the wave washer is abutted against the end face of the bearing outer ring.

The utility model has the advantages that: the utility model discloses an add an elastic gasket between lower carriage and stator core, the gasket compression comes to compress tightly motor stator reliably, and the axial dimension of motor is guaranteed in the designing requirement scope in the terminal surface cooperation of upper and lower support to avoid appearing because of motor core compression, and cause motor axial dimension to be littleer, the problem of vibration and noise when the motor moves.

Drawings

FIG. 1 is a schematic perspective view of the motor of the present invention;

FIG. 2 is a schematic top view of the structure of FIG. 1;

FIG. 3 is a schematic cross-sectional view taken along line B-B of FIG. 2;

fig. 4 is a schematic structural view of the elastic pad.

Reference numerals:

10. the bearing comprises an upper support, 20, a lower support, 21, a bearing chamber, 30, a stator core, 31, a groove, 40, a bearing, 50, a rotor, 60, a screw, 70, a wave washer, 80, an elastic gasket, 81 and a groove.

Detailed Description

The technical solution of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the present invention.

The utility model discloses a brushless motor for dust catcher through add an elastic gasket between lower carriage and stator core, guarantees the bearing pretightning force and for the value of design, vibration and noise when reducing the high-speed operation of motor provide product percent of pass and customer satisfaction.

Referring to fig. 1 to 3, a brushless motor for a vacuum cleaner according to an embodiment of the present invention includes an upper bracket 10, a lower bracket 20, a stator core 30, a rotor 50, and an elastic gasket 80, wherein the upper bracket 10 and the lower bracket 20 are respectively fixed to upper and lower sides of the stator core 30, and the upper and

lower brackets

10 and 20 can be fixedly connected by a screw 60 during operation.

The stator core 30 is mounted on the upper bracket 10, and preferably, both the upper bracket 10 and the lower bracket 20 have a spigot end surface (not shown), and the inner circles of the spigot end surfaces of the upper bracket 10 and the lower bracket 20 are matched with the outer circle of the stator core 30, so as to ensure the stator core 30 and the rotor 50 to be concentric.

Preferably, an elastic washer 80 is disposed between the contact surfaces of the lower bracket 20 and the stator core 30, and the elastic washer 80 compresses to reliably press the stator core 30, and in this embodiment, the elastic washer 80 is particularly disposed between the spigot end surface of the lower bracket 20 and the end surface of the stator core 30. In practice, the resilient pad 80 is made of a resilient material rubber or spring steel.

In this embodiment, as shown in fig. 4, the elastic pad 80 is in a hollow circular ring shape, and at least one groove 81 is disposed on the outer edge of the elastic pad 80, and each groove 81 is formed by recessing from the outer edge of the elastic pad 80 to a direction close to the center of the circle of the pad. The positions of the grooves 81 on the elastic gasket 80 correspond to the positions of the grooves 31 on the outer edge of the stator core 30, and the number of the grooves 81 is the same as the number of the grooves 31 on the outer edge of the stator core 30, that is, the stator core 30 is provided with a plurality of grooves 31, and the elastic gasket 80 is provided with a plurality of grooves 81. In this embodiment, the elastic pad 80 is provided with 6 grooves 81, and the 6 grooves 81 are circumferentially and uniformly distributed on the elastic pad 80.

In addition, the motor further includes a bearing 40 and a wave washer 70, in this embodiment, a bearing chamber 21 for accommodating the bearing 40 is provided in the lower bracket 20, and the bearing 40 is installed in the bearing chamber 21. The end face of the wave washer 70 is against the end face of the bearing outer ring, and the wave washer 70 can provide axial pre-tightening force for the bearing 40 after being compressed.

During installation, after the lower support 20 is fastened with the upper support 10 through the screws 60, the elastic gasket 80 is compressed to reliably compress the stator core 30, and after the elastic gasket 80 is arranged, the end face of the upper support 10 is matched with the end face of the lower support 20 in a fitting manner, the axial size of the motor is ensured within a design requirement range, and the bearing pretightening force is ensured to be a designed value, so that the situation that the axial size of the motor is smaller due to the compression of the stator core 30 is avoided, the vibration and noise during the operation of the motor are reduced, namely, the vibration and noise during the high-speed operation of the motor are reduced, and the product qualification rate and the customer satisfaction are provided.

The technical contents and features of the present invention have been disclosed as above, however, those skilled in the art can still make various substitutions and modifications based on the teaching and disclosure of the present invention without departing from the spirit of the present invention, therefore, the protection scope of the present invention should not be limited to the contents disclosed in the embodiments, but should include various substitutions and modifications without departing from the present invention, and should be covered by the claims of the present patent application.

Claims

1. The brushless motor for the dust collector is characterized by comprising an upper support, a lower support and a stator core, wherein the stator core is installed on the upper support, the upper support and the lower support are respectively located on the upper side and the lower side of the stator core and fixedly connected with the lower support, an elastic gasket is arranged between contact surfaces of the lower support and the stator core, and the end surface of the upper support is attached to the end surface of the lower support.

2. The brushless motor for a vacuum cleaner according to claim 1, wherein the lower bracket includes a spigot end surface, and the elastic spacer is provided between the spigot end surface of the lower bracket and the end surface of the stator core.

3. The brushless motor for vacuum cleaner as claimed in claim 1, wherein the elastic washer is a ring washer.

4. The brushless motor for vacuum cleaner as claimed in claim 1, wherein the elastic pad has at least one recess formed on an outer edge thereof.

5. The brushless motor for vacuum cleaner as claimed in claim 4, wherein the slots correspond to the positions of the slots on the stator core.

6. The brushless motor for vacuum cleaner as claimed in claim 1, wherein the elastic pad is made of elastic rubber or spring steel.

7. The brushless motor for a vacuum cleaner according to claim 1, wherein the upper bracket and the lower bracket are fixedly coupled by a screw.

8. The brushless motor for a vacuum cleaner according to claim 1, further comprising a bearing provided in the lower bracket.

9. The brushless motor for a vacuum cleaner according to claim 8, wherein a bearing chamber is provided in the lower bracket, and the bearing is received in the bearing chamber.

10. The brushless motor for vacuum cleaner according to claim 8, further comprising a wave washer, an end surface of the wave washer abutting on an end surface of the bearing outer race.