CN212085935U

CN212085935U - Direct current motor

Info

Publication number: CN212085935U
Application number: CN202020736481.3U
Authority: CN
Inventors: 卢齐荣
Original assignee: New Century Electrical Manufacturing Zhongshan Co Ltd
Current assignee: New Century Electrical Manufacturing Zhongshan Co Ltd
Priority date: 2020-05-07
Filing date: 2020-05-07
Publication date: 2020-12-04
Anticipated expiration: 2030-05-07

Abstract

The utility model discloses a direct current motor, include: the inner stator comprises a fixed shaft and a winding group, and the center of the winding group is fixedly connected with the fixed shaft; the outer rotor comprises a machine shell, the machine shell is rotatably installed on the fixed shaft, a first annular wall, a second annular wall and a third annular wall are sequentially arranged on the machine shell, magnetic poles are fixedly arranged on the inner wall of the second annular wall, the winding group is located in the second annular wall, and two ends of the winding group respectively form a first cavity and a second cavity with the first annular wall and the third annular wall. The utility model discloses a have better radiating effect, can effectively reduce calorific capacity of motor, guarantee the life of motor.

Description

Direct current motor

Technical Field

The utility model relates to the technical field of electric machines, in particular to direct current motor.

Background

Along with the development of motor technology, more and more external rotor direct current motors appear, compare with general motor, external rotor direct current motor's rotor is outside, the stator is inside, outside carrier is connected with the shell of motor, the shell rotation of motor drives the carrier motion, its advantage lies in that inertia is big, the heat dissipation is good, can effectively save the copper line simultaneously, is widely used in aircraft and domestic appliance, but current external rotor direct current motor's structure is compacter, leads to its radiating effect relatively poor at the during operation.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art. Therefore, the utility model provides a direct current motor, this direct current motor has better radiating effect.

According to the utility model discloses a direct current motor of first aspect embodiment includes: the inner stator comprises a fixed shaft and a winding group, and the center of the winding group is fixedly connected with the fixed shaft; the outer rotor comprises a machine shell, the machine shell is rotatably installed on the fixed shaft, a first annular wall, a second annular wall and a third annular wall are sequentially arranged on the machine shell, magnetic poles are fixedly arranged on the inner wall of the second annular wall, the winding group is located in the second annular wall, and two ends of the winding group respectively form a first cavity and a second cavity with the first annular wall and the third annular wall.

According to the utility model discloses direct current motor has following technological effect at least: the heat that winding group produced in the course of the work can be quick to first cavity and the diffusion of second cavity to distribute away through the casing, guarantee that winding group has better radiating effect, thereby can effectively reduce calorific capacity of motor, guarantee the life of motor.

According to the utility model discloses a few embodiments, casing one end sets up to the opening, rotate on the fixed axle be provided with opening complex end cover, be provided with cooperation fixed mounting's through-hole on casing and the end cover. Can use the screw rod to pass through-hole with casing and end cover fixed connection, make casing and end cover synchronous rotation, the heat that produces in the winding set working process still can give off through the gap between casing and the end cover simultaneously, can further strengthen its radiating effect.

According to some embodiments of the present invention, the diameter of the first ringwall is smaller than the diameter of the second ringwall, the diameter of the second ringwall is smaller than the diameter of the third ringwall, the opening is provided in the third ringwall one side, the end cap is provided with an installation part for installing an external component. Make things convenient for the operator to assemble this motor through the opening of third rampart one side, also be convenient for simultaneously to install external component through the installed part on the end cover.

According to some embodiments of the invention, the end cap is provided with a hem, the hem covering the open one end of the housing.

According to some embodiments of the invention, the mounting member is a mounting hole provided on the end cover. The mounting may be achieved by mounting the external component on the mounting hole using a screw.

According to some embodiments of the utility model, the fixed axle is kept away from the end cover is served and is provided with the mounting. After the fixing shaft is fixedly installed through the fixing piece, the motor is fixedly installed and then is communicated with the power supply, the shell and the end cover can rotate around the fixing shaft, and meanwhile, the fixing piece is arranged at one end far away from the end cover, so that the motor is fixedly installed and the installation of external components on the end cover is not interfered.

According to some embodiments of the invention, the mounting is a fixing hole provided in the fixing shaft. The fixed mounting of the fixed shaft can be realized by using screws to be matched with the fixed holes.

According to some embodiments of the utility model, the fixed axle both ends are provided with the bearing respectively, the casing reaches be provided with respectively in the end cover with the bearing chamber of bearing cooperation installation.

According to the utility model discloses a some embodiments, the winding group includes magnetic shoe group, magnetic shoe group both ends are provided with the magnetic shoe cover. Specifically, the magnetic shoe set is integrally embedded after being placed in a mold for injection molding, and magnetic shoe sleeves are formed at two ends of the magnetic shoe set after cooling, so that the effect of fixing the magnetic shoe set is achieved, and meanwhile, the assembly efficiency of the motor can be effectively improved.

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 cross-sectional view of an embodiment of the present invention;

FIG. 2 is a schematic view of the end cap of the embodiment of the present invention after being separated from the housing;

fig. 3 is a schematic view of an inner stator and a bearing according to an embodiment of the present invention;

fig. 4 is a schematic view of the magnetic shoe set and the magnetic shoe sleeve according to the embodiment of the present invention;

fig. 5 is a schematic view of a magnetic shoe cover according to an embodiment of the present invention.

Reference numerals:

101. a fixed shaft; 102. winding; 103. a fixing hole; 104. a magnetic shoe set; 105. a magnetic shoe sleeve; 106. a coil;

201. a housing; 202. a magnetic pole; 203. a first annular wall; 204. a second annular wall; 205. a third annular wall; 206. an end cap; 207. a through hole; 208. folding edges; 209. mounting holes; 210. a bearing cavity; 211. a first cavity; 212. a second cavity;

300. and a bearing.

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 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 drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, 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, a plurality of means are one or more, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, 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 there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

A direct current motor according to an embodiment of the present invention is described below with reference to fig. 1 to 5.

As shown in fig. 1 and fig. 2, a dc motor according to an embodiment of the present invention includes: the inner stator comprises a fixed shaft 101 and a winding group 102, and the center of the winding group 102 is fixedly connected with the fixed shaft 101; the outer rotor comprises a machine shell 201, the machine shell 201 is rotatably installed on the fixed shaft 101, a first annular wall 203, a second annular wall 204 and a third annular wall 205 are sequentially arranged on the machine shell 201, magnetic poles 202 are fixedly arranged on the inner wall of the second annular wall 204, the winding set 102 is located in the second annular wall 204, and two ends of the winding set 102 respectively form a first cavity 211 and a second cavity 212 with the first annular wall 203 and the third annular wall 205. Through setting casing 201 to 3 ramparts, the heat that winding group 102 produced in the course of the work can be quick to first cavity 211 and the diffusion of second cavity 212 to distribute away through casing 201, guarantee that winding group 102 has better radiating effect, thereby can effectively reduce the calorific capacity of motor, guarantee the life of motor.

In some embodiments of the present invention, as shown in fig. 1 and fig. 2, one end of the casing 201 is set as an opening, the fixing shaft 101 is rotatably provided with an end cover 206 engaged with the opening, and the casing 201 and the end cover 206 are provided with a through hole 207 engaged with the fixing device.

Specifically, the number of the through holes 207 on the casing 201 and the end cover 206 is 3, and the through holes are uniformly distributed, so that the casing 201 and the end cover 206 can be fixedly connected through the through holes 207 by using 3 screws, the casing 201 and the end cover 206 synchronously rotate, and meanwhile, heat generated in the working process of the winding group 102 can be dissipated through a gap between the casing 201 and the end cover 206, and the heat generated during the working of the motor can be further reduced.

In some embodiments of the present invention, the diameter of the first annular wall 203 is smaller than the diameter of the second annular wall 204, the diameter of the second annular wall 204 is smaller than the diameter of the third annular wall 205, the opening is disposed on one side of the third annular wall 205, and the end cover 206 is provided with a mounting member for mounting an external component.

Specifically, an operator can assemble the motor conveniently through the opening on one side of the third annular wall 205, and meanwhile, a user can install the external component conveniently through the installation part on the end cover 206, so that the external component rotates synchronously with the machine shell 201 and the end cover 206.

In some embodiments of the present invention, the mounting member is a mounting hole 209 provided on the end cap 206.

Specifically, 6 mounting holes 209 are evenly distributed in 3 groups on the end face of the end cap 206, and mounting can be achieved by mounting external components on the mounting holes 209 using screws.

In some embodiments of the present invention, the end cap 206 is provided with a folded edge 208, and the folded edge 208 covers the open end of the casing 201.

In some embodiments of the present invention, a fixing member is disposed at an end of the fixing shaft 101 away from the end cap 206.

Specifically, after the fixing shaft 101 is fixedly mounted through the fixing member, the motor is fixedly mounted and then connected to the power supply, so that the casing 201 and the end cover 206 can rotate around the fixing shaft 101, and meanwhile, the fixing member is arranged at one end far away from the end cover 206, so that the motor is not interfered with the fixing mounting of the external component on the end cover 206.

In some embodiments of the present invention, the fixing member is a fixing hole 103 provided on the fixing shaft 101.

Specifically, the fixed mounting of the fixed shaft may be achieved by using a screw to cooperate with the fixing hole.

In some embodiments of the present invention, the bearings 300 are respectively disposed at two ends of the fixed shaft 101, and the bearing cavities 210 installed in cooperation with the bearings 300 are respectively disposed in the casing 201 and the end cover 206.

In some embodiments of the present invention, as shown in fig. 3-5, the winding set 102 includes a magnetic shoe set 104, two ends of the magnetic shoe set 104 are provided with magnetic shoe sleeves 105, and a coil 106 is wound on the magnetic shoe sleeves 105.

Specifically, the magnetic shoe set 104 is placed in a mold and integrally embedded after injection molding, and magnetic shoe sleeves 105 are formed at two ends of the magnetic shoe set 104 after cooling, so that the magnetic shoe set 104 is fixed, and meanwhile, the assembly efficiency of the motor can be effectively improved.

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 without departing from the spirit of the present invention within the knowledge of those skilled in the art.

Claims

1. A direct current motor, comprising:

the inner stator comprises a fixed shaft (101) and a winding group (102), and the center of the winding group (102) is fixedly connected with the fixed shaft (101);

the outer rotor comprises a machine shell (201), the machine shell (201) is rotatably installed on the fixed shaft (101), a first annular wall (203), a second annular wall (204) and a third annular wall (205) are sequentially arranged on the machine shell (201), magnetic poles (202) are fixedly arranged on the inner wall of the second annular wall (204), the winding set (102) is located in the second annular wall (204), and a first cavity (211) and a second cavity (212) are formed at two ends of the winding set (102) respectively with the first annular wall (203) and the third annular wall (205).

2. A direct current motor according to claim 1, characterized in that: casing (201) one end sets up to the opening, it is provided with and opens the complex end cover (206) to rotate on fixed axle (101), be provided with cooperation fixed mounting's through-hole (207) on casing (201) and end cover (206).

3. A direct current motor according to claim 2, wherein: the diameter of the first annular wall (203) is smaller than that of the second annular wall (204), the diameter of the second annular wall (204) is smaller than that of the third annular wall (205), the opening is formed in one side of the third annular wall (205), and a mounting piece for mounting an external component is arranged on the end cover (206).

4. A direct current motor according to claim 2, wherein: the end cover (206) is provided with a folded edge (208), and the folded edge (208) covers one end of the opening of the machine shell (201).

5. A direct current motor according to claim 3, wherein: the mounting member is a mounting hole (209) provided on the end cap (206).

6. A direct current motor according to claim 3, wherein: and a fixing piece is arranged at one end of the fixing shaft (101) far away from the end cover (206).

7. A direct current motor according to claim 6, wherein: the fixing piece is a fixing hole (103) arranged on the fixing shaft (101).

8. A direct current motor according to claim 2, wherein: the bearing (300) are respectively arranged at two ends of the fixed shaft (101), and bearing cavities (210) which are matched with the bearings (300) are respectively arranged in the machine shell (201) and the end cover (206).

9. A direct current motor according to claim 1, characterized in that: the winding set (102) comprises a magnetic shoe set (104), and magnetic shoe sleeves (105) are arranged at two ends of the magnetic shoe set (104).