CN215344168U

CN215344168U - Motor housing and high-speed motor

Info

Publication number: CN215344168U
Application number: CN202121236341.0U
Authority: CN
Inventors: 姚劲夫; 姚劲松; 宗锋; 李洪军; 李兴元
Original assignee: Foshan City Nanhai District Tianyang Motor Manufacturing Co ltd
Current assignee: Guangdong Tianyang Motor Co.,Ltd.
Priority date: 2021-05-17
Filing date: 2021-05-17
Publication date: 2021-12-28
Anticipated expiration: 2031-05-17

Abstract

The utility model discloses a motor housing, comprising: a housing; the installation part is positioned in the shell, an air channel is formed between the installation part and the shell, the shell is provided with a reducing inner circumferential wall at the position of the air channel, and the inner diameter of the reducing inner circumferential wall is gradually reduced from two ends of the air channel to the middle of the air channel; the air guide blades are multiple in number, the installation part is connected with the shell in a fixed mode through the air guide blades, and the air guide blades are annularly distributed in the air channel. If the motor shell is applied to a brushless motor with high rotating speed, when air flows through the air duct, the front end of the air flow can be compressed by the variable-diameter inner peripheral wall, so that air at the rear end of the air flow is more condensed and is not dispersed when the air flow is discharged, and the flowing distance of the air flow in the air duct is lengthened by the variable-diameter inner peripheral wall, so that wind noise is reduced. Meanwhile, the utility model also provides a high-speed motor applying the motor shell.

Description

Motor housing and high-speed motor

Technical Field

The utility model relates to the technical field of motors, in particular to a motor shell and a high-speed motor.

Background

The motor of the existing high-speed hair dryer is generally a brushless motor, and the motor shell of the brushless motor is a bearing structure part for mounting a stator, a rotor and fan blades. At present, in order to increase the wind speed and wind pressure of the brushless motor, the most common method is to increase the rotation speed of the brushless motor, but the increase of the rotation speed of the brushless motor generates large wind noise and causes wind fluid to scatter rather than gather.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to a motor housing that solves one or more of the problems set forth in the prior art, and that provides at least one useful alternative or creation.

A motor housing according to an embodiment of the first aspect of the utility model comprises:

a housing;

the installation part is positioned in the shell, an air channel is formed between the installation part and the shell, the shell is provided with a reducing inner circumferential wall at the position of the air channel, and the inner diameter of the reducing inner circumferential wall is gradually reduced from two ends of the air channel to the middle of the air channel;

the air guide blades are multiple in number, the installation part is connected with the shell in a fixed mode through the air guide blades, and the air guide blades are annularly distributed in the air channel.

The motor shell provided by the embodiment of the utility model has at least the following beneficial effects: if the motor shell is applied to a brushless motor with high rotating speed, the casing is provided with the reducing inner circumferential wall at the position of the air duct, so that when air flows through the air duct, the front end of the air flow can be compressed by the reducing inner circumferential wall, the air at the rear end is more condensed and not dispersed when air is given out, the flowing distance of the air flow in the air duct is increased by the reducing inner circumferential wall, and the wind noise is reduced.

According to some embodiments of the utility model, when the maximum inner diameter difference of the variable-diameter inner circumferential wall is large, the convex part of the variable-diameter inner circumferential wall may cause a certain obstruction to the flow of the airflow, and therefore, the maximum inner diameter difference of the variable-diameter inner circumferential wall does not exceed 3 mm.

According to some embodiments of the utility model, the housing and the mounting portion are each shaped as a torus in order to reduce resistance to airflow.

According to some embodiments of the utility model, a grounding male terminal is provided on the housing to ground the housing.

According to some embodiments of the utility model, the housing, the wind-guiding blade and the mounting portion are all conductors in order to ground all components.

The high-speed motor according to the embodiment of the second aspect of the utility model comprises a rotor assembly, a stator assembly and the motor shell, wherein the mounting part is provided with a rotor cavity for mounting the rotor assembly and a stator cavity for mounting the stator assembly, the rotor cavity is communicated with the stator cavity, the rotor assembly is provided with fan blades outside the mounting part, and the stator assembly is used for driving the fan blades to rotate so as to drive the fan blades to generate airflow flowing through the air duct.

The high-speed motor provided by the embodiment of the utility model at least has the following beneficial effects: the high-speed motor adopting the motor shell can more effectively condense the wind columns of the air outlet when the high-speed motor is in a high rotating speed state, and reduces wind noise.

According to some embodiments of the present invention, the high-speed motor further includes a driver, the stator assembly is provided with a plurality of winding coils, the plurality of winding coils are electrically connected to the driver, and the driver is configured to control an internal magnetic field of the stator assembly, so as to drive the fan blade.

According to some embodiments of the present invention, in order to better install the rotor assembly in the rotor cavity, a plurality of glue grooves are formed on an inner wall surface of the rotor cavity.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic perspective view of a motor housing according to an embodiment of the present invention;

FIG. 2 is a rear view of the motor housing shown in FIG. 1;

FIG. 3 is a top view of the motor housing shown in FIG. 1;

FIG. 4 is a cross-sectional view of the motor housing shown in FIG. 3 taken along section line A-A;

fig. 5 is a schematic perspective view of a high-speed motor according to an embodiment of the present invention.

In the drawings: 100-shell, 200-installation part, 300-air duct, 310-reducing inner peripheral wall, 210-rotor cavity, 220-stator cavity, 211-rubber groove, 320-wind guide blade, 110-groove, 111-grounding male terminal, 10-motor shell, 20-rotor component, 21-rotating shaft and 22-fan blade.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.

As shown in fig. 1 to 4, a motor housing 10 according to an embodiment of the first aspect of the present invention includes a casing 100 and a mounting portion 200, where the shape of the casing 100 and the shape of the mounting portion 200 are both circular rings, the casing 100 and the mounting portion 200 are coaxially disposed, an air inlet and an air outlet are respectively disposed at front and rear ends of the casing 100, the mounting portion 200 is located in the casing 100, an air duct 300 is formed between the mounting portion 200 and the casing 100, the casing 100 is provided with a variable-diameter inner peripheral wall 310 at a position of the air duct 300, an inner diameter of the variable-diameter inner peripheral wall 310 gradually decreases from two ends of the air duct 300 to a middle of the air duct 300, that is, a middle of the variable-diameter inner peripheral wall 310 protrudes out of two ends of the variable-diameter inner peripheral wall 310, and a cross-sectional shape of the variable-diameter inner peripheral wall 310 may refer to fig. 4, which is a smooth transition curve. Specifically, the mounting portion 200 is provided with a rotor cavity 210 for mounting the rotor assembly 20 and a stator cavity 220 for mounting the stator assembly, the rotor cavity 210 is communicated with the stator cavity 220, and since the magnetic ring of the rotor assembly 20 is generally located in the stator core of the stator assembly, the size of the stator cavity 220 is larger than that of the rotor cavity 210.

Meanwhile, a plurality of air guide blades 320 are disposed between the mounting portion 200 and the casing 100, the mounting portion 200 and the casing 100 are fixedly connected by the plurality of air guide blades 320, and the plurality of air guide blades 320 are annularly arranged in the air duct 300. Specifically, each air guide blade 320 is an arc-shaped blade, and each arc-shaped blade protrudes outwards in the same rotation direction, so that when airflow flows through the air duct 300, a rotational flow can be generated to enhance the stability of air pressure fluctuation.

With the above structure, if the motor housing 10 is applied to a brushless motor with a high rotation speed, each time the airflow passes through the air duct 300, the inner circumference wall 310 with variable diameter can compress the front end of the airflow, so that the air at the rear end is more condensed and not diffused when the air is discharged, and the arrangement of the inner circumference wall 310 with variable diameter lengthens the flowing distance of the airflow in the air duct 300, thereby reducing the wind noise. It should be further noted that when the maximum inner diameter difference of the variable-diameter inner circumferential wall 310 is large, the convex portion of the variable-diameter inner circumferential wall 310 may cause a certain obstruction to the flow of the airflow, and therefore, through the research of the inventor, the maximum inner diameter difference of the variable-diameter inner circumferential wall 310 should not exceed 3mm, and is preferably 2.4 mm.

As shown in fig. 1, in some embodiments of the present invention, in order to increase the safety factor, the casing 100 needs to be grounded, for this purpose, a groove 110 is formed at an edge of the casing 100, a grounded male terminal 111 is fixedly disposed in the groove 110, and the casing 100, the wind-guiding blade 320, and the mounting portion 200 are all conductors. Specifically, the grounding male terminal 111 is welded in the groove 110, the grounding male terminal 111 is a pin structure, and can be detachably connected to a grounding female terminal, and when the grounding male terminal 111 is connected to the grounding female terminal, the housing 100 meets the requirement of grounding.

As shown in fig. 1 and 2, in some embodiments of the present invention, in order to enable the bearing of the rotor assembly 20 to be firmly installed in the rotor cavity 210, four glue grooves 211 are formed on the inner wall surface of the rotor cavity 210, and the four glue grooves 211 are arranged around the central circumference of the rotor cavity 210; before the bearing is installed, pouring the pouring sealant into each glue groove 211, then installing the bearing, if the bearing needs to be disassembled, blowing the pouring sealant to the glue grooves 211 by using a hot air gun, and smoothly disassembling the bearing after the pouring sealant is melted. It is understood that the number of the glue grooves 211 may also be two, three, five, etc., without being limited thereto.

As shown in fig. 5, the high-speed motor according to the embodiment of the second aspect of the present invention includes the motor housing 10 according to the embodiment of the first aspect of the present invention, and further includes a rotor assembly 20, a stator assembly (not shown in the drawings), and a driver (not shown in the drawings), wherein the rotor assembly 20 is installed in the rotor cavity 210, and the stator assembly is installed in the stator cavity 220. Rotor subassembly 20 includes pivot 21, magnetic ring, holding ring, first bearing, pre-compaction subassembly, second bearing and fan blade 22, magnetic ring, holding ring, first bearing, pre-compaction subassembly, second bearing, fan blade 22 are installed from back forward in proper order in the pivot 21, first bearing with the second bearing is all installed in the rotor cavity 210, first bearing with the second bearing all with pivot 21 carries out interference fit, the magnetic ring with the holding ring is located the rear of installation department 200. The magnetic ring is a permanent magnet, the positioning ring can be a copper ring, the positioning ring is fixedly sleeved on the rotating shaft 21 through glue before the magnetic ring is installed, the positioning ring is used for axially positioning the magnetic ring, and the magnetic ring can be fixedly sleeved on the rotating shaft 21 through the glue after the magnetic ring is abutted to the positioning ring in the subsequent assembling process. The pre-pressing assembly comprises a spring and two spring retaining sleeves, two ends of the spring are respectively nested in the two spring retaining sleeves, the two spring retaining sleeves can perform good axial positioning on the spring to stabilize the elastic direction of the spring, and the two spring retaining sleeves are respectively abutted against the first bearing and the second bearing to pre-press the two bearings and eliminate axial play of the two bearings. The fan blade 22 is made of aluminum alloy or carbon fiber composite materials, the fan blade 22 is composed of a plurality of blades with curved surfaces, the fan blade 22 is installed on the rotating shaft 21 in a press fit mode, and the fan blade 22 is located in front of the installation portion 200.

In addition, the stator assembly includes a stator core made of a magnetic conductive material, such as silicon steel, and three winding coils respectively wound on tooth slots of the stator core to form three-phase windings, the magnetic ring of the rotor assembly 20 extends into the stator core, and the plurality of winding coils are electrically connected to the driver. After the driver is powered on, under the control of the driver, the magnetic ring on the rotor assembly 20 is driven by the lorentz force of the stator assembly to rotate, so as to drive the rotating shaft 21 of the rotor assembly 20 to rotate, and finally drive the fan blade 22 to rotate, so as to drive the fan blade 22 to generate the airflow flowing through the air duct 300 and the stator assembly.

Since the high-speed motor adopts all technical solutions of all the embodiments, at least all the beneficial effects brought by the technical solutions of the embodiments are achieved, and no further description is given here.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.

Claims

1. Motor housing, its characterized in that includes:

a housing (100);

the air duct (300) is formed between the mounting part (200) and the shell (100), the shell (100) is provided with a variable-diameter inner peripheral wall (310) at the position of the air duct (300), and the inner diameter of the variable-diameter inner peripheral wall (310) is gradually reduced from two ends of the air duct (300) to the middle of the air duct (300);

guide vane (320), its quantity is a plurality of, installation department (200) with casing (100) are through a plurality of guide vane (320) carry out fixed connection, wind channel (300) interior annular is laid a plurality of guide vane (320).

2. The motor housing of claim 1, wherein: the maximum inner diameter difference of the variable-diameter inner peripheral wall (310) is not more than 3 mm.

3. The motor housing of claim 1, wherein: the shape of the housing (100) and the shape of the mounting part (200) are both circular bodies.

4. The motor housing of claim 1, wherein: and a grounding male terminal (111) is arranged on the shell.

5. The motor housing of claim 4, wherein: the casing (100), the air guide blade (320) and the mounting part (200) are all conductors.

6. A high speed electric motor comprising the motor casing of any one of claims 1 to 5, further comprising: rotor subassembly (20) and stator module, installation department (200) are equipped with rotor cavity (210) that are used for installing rotor subassembly (20) and stator cavity (220) that are used for installing stator module, rotor cavity (210) with stator cavity (220) intercommunication, rotor subassembly (20) are in be equipped with fan blade (22) outside installation department (200), stator module is used for the drive fan blade (22) are rotatory, in order to drive fan blade (22) produce and flow through the air current of wind channel (300).

7. The high speed electric machine of claim 6, wherein: still include the driver, stator module is equipped with a plurality of winding coils, and is a plurality of the winding coil all with driver electric connection.

8. The high speed electric machine of claim 6, wherein: the inner wall surface of the rotor cavity (210) is provided with a plurality of glue grooves (211).