CN212486267U

CN212486267U - High-rotation-speed motor with high stability

Info

Publication number: CN212486267U
Application number: CN202021246869.1U
Authority: CN
Inventors: 刘超
Original assignee: Dongguan Country Dream Motor Co ltd
Current assignee: Dongguan Country Dream Motor Co ltd
Priority date: 2020-07-01
Filing date: 2020-07-01
Publication date: 2021-02-05
Anticipated expiration: 2030-07-01

Abstract

The utility model provides a high-speed motor with high stability, which comprises a stator component, a rotor component, a shell and a fixed shaft, wherein the stator component comprises a stator core; the shell is provided with a fixed groove for fixing the stator assembly, and the bottom of the fixed groove is provided with a through hole for the fixed shaft to pass through; the inner wall of the fixing groove is provided with at least one fixing strip for fixing the stator core. The utility model provides a pair of high rotational speed motor that stability is high can more firmly fix stator module, keeps the axiality of front bearing and rear bearing simultaneously.

Description

High-rotation-speed motor with high stability

Technical Field

The utility model relates to a technical field of motor, concretely relates to high rotational speed motor of stability.

Background

A small or miniature motor, such as a high-speed permanent magnet brushless motor, has a series of advantages of large power density, small geometric dimension, fast dynamic response, high operation efficiency and the like, and has wide application prospect in high-speed operation occasions, such as a hair dryer, in which a high-speed permanent magnet brushless motor is used.

The prior art is small-scale or miniature brushless electric machine including motor casing, stator module, rotor module, motor back cover, front bearing and rear bearing, the front bearing is installed in bearing chamber of the motor casing, the rear bearing is installed in bearing chamber of the motor back cover, the stator module is fixed on the inner wall of the motor casing, two ends of the rotating shaft of the rotor module are inserted from the inner hole of the front bearing and the inner hole of the rear bearing respectively, the motor back cover is fixed on the open end of the motor casing, the permanent magnet part on the rotor module is located between front bearing and rear bearing, and cooperate with stator module; the brushless motor with the structure has the advantages that the stator assembly is wrapped in the motor shell, the heat dissipation effect is poor, the temperature rise is high, the service life is short, the front bearing and the rear bearing are respectively arranged on the two components, and the coaxiality of the central axis of the front bearing and the central axis of the rear bearing is difficult to guarantee.

SUMMERY OF THE UTILITY MODEL

In order to solve the above problem, the utility model aims at providing a high rotational speed motor that stability is high can more firmly fix stator module, keeps the axiality of front bearing and rear bearing simultaneously.

In order to achieve the purpose, the utility model provides a high-speed motor with high stability, which comprises a stator component, a rotor component, a shell and a fixed shaft, wherein the stator component comprises a stator core; the shell is provided with a fixed groove for fixing the stator assembly, and the bottom of the fixed groove is provided with a through hole for the fixed shaft to pass through; the inner wall of the fixing groove is provided with at least one fixing strip for fixing the stator core.

According to another embodiment of the present invention, the number of the fixing strips is three.

According to another embodiment of the present invention, the fixing strip extends from the notch of the fixing groove to the direction of the groove bottom.

According to another embodiment of the present invention, the fixed shaft further comprises a front bearing, a rear bearing, a fixed ring and a wave pad; the front bearing, the wave pad, the fixing ring and the rear bearing are sequentially sleeved on the fixing shaft and are arranged in the through hole; the fixed ring is used for separating the front bearing from the rear bearing, and the wave pad generates elastic force to enable the bearing surface in contact with the shell to be stressed.

According to another embodiment of the present invention, the fixing shaft further comprises a fixing ring, and the fixing shaft is provided with a fixing groove for fixing the fixing ring; the fixed ring is used for fixing the front bearing and the rear bearing; the fixed ring is used for fixing the bearing and simultaneously enabling the bearing inner ring to be stressed.

According to another embodiment of the present invention, the rotor assembly further comprises a magnetic strip and two bobbins; the magnetic strip is sleeved outside the fixed shaft; the winding frames are fixed at two ends of the stator iron core; two bobbins can adapt to the length of different stator cores, and the flexibility is higher.

According to another embodiment of the present invention, the rotor assembly further comprises a PCB board; a winding frame far away from the magnetic strip is provided with a pin; the PCB is electrically connected with the pins.

According to another embodiment of the present invention, a ventilation tube is sleeved outside the housing; a ventilation cavity is arranged between the shell and the ventilation barrel; the air guide pieces are connected between the shell and the ventilating duct and are obliquely arranged, so that heat dissipation is facilitated.

According to another embodiment of the present invention, the high rotational speed motor with high stability further comprises a fan impeller; the wind impeller is sleeved at one end of the fixed shaft, which is far away from the magnetic strip, and is arranged in the ventilating duct; the outer side of the wind impeller is provided with a wind blade.

According to another embodiment of the present invention, a fixing plate is disposed on a side of the ventilation tube, and a fixing hole for installation is formed on the fixing plate.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model discloses a fixed axle keeps the axiality of fore bearing and rear bearing, and the fixed strip can be used for blocking stator core, makes stator module fix on the casing better, prevents under the high rotational speed condition that stator module drops.

The present invention will be described in further detail with reference to the accompanying drawings.

Drawings

FIG. 1 is a schematic diagram of a high speed motor with high stability;

FIG. 2 is a schematic structural view of a housing and a funnel of a high stability high speed motor;

fig. 3 is another schematic diagram of a high-speed motor with high stability.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are 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 the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

The present embodiment provides a high-stability high-speed motor, as shown in fig. 1-3, including a stator assembly 1, a rotor assembly 2, a housing 3 and a stationary shaft 4, where the stator assembly 1 includes a stator core 11, a PCB 12 and two bobbins 13; the rotor assembly 2 further comprises a magnetic strip; the magnetic strip is sleeved outside the fixed shaft 4; the bobbin 13 is fixed at both ends of the stator core 11; the two winding frames 13 can adapt to the lengths of different stator cores 11, and the flexibility is high; the shell 3 is provided with a fixed groove, and the bottom of the fixed groove is provided with a through hole 32; the stator assembly 1 is fixed inside the fixed groove, and the fixed shaft 4 penetrates through the rotor assembly 2, the stator assembly 1 and the through hole 32 in sequence; the side of the stator core 11 is provided with three grooves 111 along the axial direction, the inner wall of the fixing groove is provided with three fixing strips 311 corresponding to the grooves 111 of the stator core 11, the fixing strips 311 extend from the notch of the fixing groove to the groove bottom, and the distance between the fixing strips 311 and the groove bottom of the fixing groove is equal to the height of the bobbin 13; the side wall of the fixing groove is also provided with a step for fixing the winding frame 13; a ventilating duct 5 is sleeved outside the shell 3; a ventilation cavity is arranged between the shell 3 and the ventilation barrel 5; an air guide sheet 6 is connected between the shell 3 and the ventilating duct 5, the air guide sheet 6 is an obliquely arranged thin sheet, and the air guide sheet 6 is fixed between the shell 3 and the ventilating duct 5 so as to guide the flow direction of air flow conveniently; the edge of air funnel 5 is equipped with two square gaps, forms stationary blade 51 between two square gaps, and open the fixed orifices that is used for the installation on stationary blade 51, the fixed of the motor of being convenient for.

The fixed shaft 4 further comprises a front bearing 41, a rear bearing 42, a fixed ring 43, a wave pad 44 and a fixed ring 45; the front bearing 41, the wave pad 44, the fixing ring 43 and the rear bearing 42 are sequentially sleeved at one end of the fixing shaft 4 away from the magnet and are arranged inside the through hole 32; the fixed ring 43 is used for separating the front bearing 41 from the rear bearing 42, and the wave pad 44 generates elastic force to force the bearing surface contacted with the shell 3; the fixed shaft 4 is provided with a fixed groove for fixing the fixed ring 45; the fixed ring 45 is a rubber ring clamped in the fixed groove, so that the front bearing 41 and the rear bearing 42 can be prevented from falling off, and the displacement of the bearings is avoided; the retainer ring 45 is used to secure the bearing while allowing the bearing inner race to be stressed.

Six pins are arranged at the edge of one winding frame 13 far away from the magnetic strip at equal intervals; the PCB 12 is a circular plate having a size equivalent to the bobbin 13; a connector is arranged on one side of the PCB 12, notches corresponding to the pins are arranged on the edge of the PCB 12, and the PCB 12 is electrically connected with the pins; the connector can be used for connecting a data line.

The high-speed motor with high stability also comprises a wind impeller 7; the wind impeller 7 is sleeved at one end of the fixed shaft 4, which is far away from the magnetic strip, and is arranged inside the ventilating duct 5; the outer side of the wind impeller 7 is provided with a wind blade.

In the embodiment, the fixed shaft 4 is used for maintaining the coaxiality of the front bearing 41 and the rear bearing 42, and the fixed bar 311 can be used for clamping the stator core 11, so that the stator assembly 1 is better fixed on the shell 3, and the stator assembly 1 is prevented from falling off under the condition of high rotating speed.

Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the scope of the invention. Any person skilled in the art can make some modifications without departing from the scope of the present invention, i.e. all equivalent modifications made according to the present invention should be covered by the scope of the present invention.

Claims

1. A high-stability high-rotating-speed motor comprises a stator assembly, a rotor assembly and a shell, wherein the stator assembly comprises a stator core; the shell is provided with a fixing groove for fixing the stator assembly, and the bottom of the fixing groove is provided with a through hole for the fixing shaft to pass through; the inner wall of the fixing groove is provided with at least one fixing strip for fixing the stator core.

2. A high speed, high stability motor according to claim 1 wherein the number of said bars is three.

3. A high-speed motor with high stability as claimed in claim 1, wherein the fixing bar extends from the notch of the fixing groove toward the groove bottom.

4. The high speed, high stability motor of claim 1 wherein said stationary shaft further comprises a front bearing, a rear bearing, a stationary ring and a wave washer; the front bearing, the wave pad, the fixing ring and the rear bearing are sequentially sleeved on the fixing shaft and are arranged in the through hole.

5. The high-stability high-speed motor according to claim 4, wherein the stationary shaft further comprises a stationary ring, and a fixing groove for fixing the stationary ring is formed on the stationary shaft; the fixed ring is used for fixing the front bearing and the rear bearing.

6. The high speed, high stability motor of claim 1 wherein said rotor assembly further comprises a magnetic strip and two bobbins; the magnetic strip is sleeved outside the fixed shaft; the winding frames are fixed at two ends of the stator core.

7. The high speed, high stability motor of claim 6 wherein said rotor assembly further comprises a PCB board; a pin is arranged on one winding frame far away from the magnetic strip; the PCB is electrically connected with the pins.

8. The high-stability high-speed motor according to claim 6, wherein a ventilation duct is sleeved outside the shell; a ventilation cavity is arranged between the shell and the ventilation barrel; and an air guide sheet is connected between the shell and the ventilating duct and is obliquely arranged.

9. The high stability, high speed motor of claim 8 further comprising a fan impeller; the wind impeller is sleeved at one end, far away from the magnetic strip, of the fixed shaft and is arranged inside the ventilating duct; and fan blades are arranged on the outer side of the fan blade wheel.

10. The high-stability high-speed motor according to claim 8, wherein a fixing plate is provided on a side surface of the funnel, and a fixing hole for mounting is formed on the fixing plate.