CN213817405U

CN213817405U - Permanent magnet type stepping motor

Info

Publication number: CN213817405U
Application number: CN202022865584.2U
Authority: CN
Inventors: 王小林
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-12-02
Filing date: 2020-12-02
Publication date: 2021-07-27
Anticipated expiration: 2030-12-02

Abstract

The utility model relates to a permanent magnet stepping motor. The permanent magnet type stepping motor comprises a motor shell, a stator component, a rotor component and a rear bottom plate; the rear bottom plate covers an opening of the motor shell and comprises a boss formed by stamping, and the boss comprises a plurality of arc-shaped stop walls and a plurality of reinforcing walls; the arc-shaped stop walls are perpendicular to the rear bottom plate main body and distributed in an annular array, and each arc-shaped stop wall abuts against the inner wall of the center of the framework of the stator assembly; the reinforcing wall is connected with two adjacent arc-shaped spigot walls, is positioned in an imaginary circle where the arc-shaped spigot walls are positioned, and forms an inclination angle with the rear bottom plate main body; the motor shell and the bosses of the rear base plate are provided with bearing mounting holes, and the rotating shaft is supported by bearings mounted on the motor shell and the bosses of the rear base plate. The utility model discloses permanent magnet stepping motor, the hole of its two bearings has good concentricity. The boss is high in mechanical strength, and the service life of the motor due to breakage and falling of the boss is avoided.

Description

Permanent magnet type stepping motor

Technical Field

The utility model relates to a permanent magnet stepping motor.

Background

In the running process of the permanent magnet stepping motor, the rotating shaft of the rotor component uses front and rear oil-containing bearings as supports, so the concentricity of inner holes of the front and rear bearings is an important parameter of the permanent magnet stepping motor, which influences the service life of the motor and the noise generated during working.

SUMMERY OF THE UTILITY MODEL

In view of the above, the present invention has been made to provide a permanent magnet type stepping motor that overcomes or at least partially solves the above problems.

The permanent magnet type stepping motor includes:

a motor housing formed with an opening;

the stator assembly is arranged on the inner surface of the motor shell and comprises a framework and an enameled wire; the enameled wire is wound in a wire slot of the framework to form a winding group;

the rotor assembly is rotatably arranged in a space formed in the center of the framework and comprises a magnetic ring and a rotating shaft, and the magnetic ring is fixedly connected with the rotating shaft;

the rear bottom plate is covered on the opening of the motor shell and comprises a boss formed by stamping, and the boss comprises a plurality of arc-shaped stop walls and a plurality of reinforcing walls; the arc-shaped spigot walls are perpendicular to the rear bottom plate main body and distributed in an annular array, and all the arc-shaped spigot walls are abutted against the inner wall of the center of the framework; the reinforcing wall is connected with two adjacent arc-shaped spigot walls, is positioned in an imaginary circle where the arc-shaped spigot walls are positioned, and forms an inclination angle with the rear bottom plate main body;

the motor shell and the bosses of the rear base plate are provided with bearing mounting holes, and the rotating shaft is supported by bearings mounted on the motor shell and the bosses of the rear base plate.

Optionally, the reinforcing wall is substantially u-shaped, and includes a first sub-reinforcing wall and a second sub-reinforcing wall, the first sub-reinforcing wall is distributed in an annular array around the center of an imaginary circle where the arc-shaped seam allowance wall is located, and two ends of the second sub-reinforcing wall are respectively connected to the ends of the adjacent first sub-reinforcing wall and the ends of the adjacent arc-shaped seam allowance wall.

Optionally, the angle between the reinforcing wall and the rear base plate main body is 135 °.

Optionally, the rear base plate forms a limiting groove at an edge, and the limiting groove is matched with the positioning boss of the framework.

Optionally, the rotor assembly further includes a support frame, and the magnetic ring is sleeved on the support frame and is fixedly connected with the rotating shaft through the support frame.

Optionally, a graphite gasket sleeved on the rotating shaft is arranged between the bearing and the support frame.

Optionally, the bearing is an oil bearing, and is mounted on the motor housing and the rear base plate in a riveting manner.

Optionally, the permanent magnet stepping motor further comprises a front mounting plate welded to the motor housing.

The utility model discloses permanent magnetism step motor, the installation accuracy of back bottom plate is guaranteed to the arc tang wall butt of the boss of back bottom plate in the inner wall of skeleton center department to ensure to install in the concentricity of the two bearing holes of motor housing, the boss of back bottom plate. The boss is high in mechanical strength and capable of bearing axial load, and the problem that the service life of the permanent magnet stepping motor is influenced due to the fact that the boss is broken and falls off in the working process of the permanent magnet stepping motor is avoided.

Drawings

The accompanying drawings, which are included to provide a further understanding of the embodiments of the application, are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the principles of the application. It is obvious that the drawings in the following description are only some embodiments of the application, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:

fig. 1 is a schematic structural diagram of an exemplary embodiment of a permanent magnet stepping motor according to the present invention;

FIG. 2 is a schematic structural view of the skeleton of FIG. 1;

FIG. 3 is a schematic structural view of the rear chassis shown in FIG. 1;

FIG. 4 is a cross-sectional view A-A of FIG. 3;

FIG. 5 is an enlarged view of portion B of FIG. 4;

fig. 6 is an enlarged view of the portion C of fig. 4.

Description of reference numerals: 1. a motor housing; 2. a rear floor; 3. a framework; 4. enamelled wires; 5. a wire slot; 6. a magnetic ring; 7. a rotating shaft; 8. a support frame; 9. a limiting groove; 10. positioning the boss; 11. a boss; 12. an arcuate finish wall; 13. a rear floor main body; 14. a first sub-reinforcing wall; 15. a second sub-reinforcing wall; 16. a bearing mounting hole; 17. a bearing; 18. a graphite gasket; 19. and (7) mounting the plate.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below are exemplary and are intended to be illustrative of the present invention, but not limiting thereof, and those skilled in the art will appreciate that various changes, modifications, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims and equivalents thereof.

The terms "central," "longitudinal," "transverse," "length," "upper," "lower," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," "circumferential," and the like, referred to or as may be referred to in the description of the invention, are used in the orientation or positional relationship indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be construed as limiting the 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 one or more of that feature. Furthermore, the terms "comprises," "comprising," and any variations thereof, are intended to cover non-exclusive inclusions.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Permanent magnet stepping motor according to an embodiment of the present invention will be described with reference to the accompanying drawings

Referring to fig. 1, according to the utility model discloses a permanent magnet stepping motor, it includes motor housing 1, stator module, rotor subassembly, back bottom plate 2.

Specifically, motor housing 1 is formed with the opening, stator module installs motor housing 1's internal surface department, and it includes skeleton 3, enameled wire 4, skeleton 3 fixed mounting be in motor housing 1's internal surface department, enameled wire 4 twines and forms the winding group in skeleton 3's wire casing 5.

The rotor assembly is rotatably installed in a space formed in the center of the framework 3 and comprises a magnetic ring 6 and a rotating shaft 7, and the magnetic ring 6 is fixedly connected with the rotating shaft 7. In this embodiment, the rotor assembly further includes a support frame 8, and the magnetic ring 6 is sleeved on the support frame 8 and is fixedly connected with the rotating shaft 7 through the support frame 8.

The rear base plate 2 covers the opening of the motor housing 1, and the rear base plate 2 is restrained in a mode of riveting the edge of the opening to prevent the rear base plate 2 from falling off. In this embodiment, in order to avoid the rotation of the rear base plate 2 in the process of riveting the edge of the opening, the rear base plate 2 forms a limit groove 9 at the edge, and the limit groove 9 is matched with the positioning boss 10 of the framework 3.

Referring now to fig. 3-6, the back plate 2 includes a stamped boss 11, and the boss 11 includes a plurality of arcuate stop walls 12 and a plurality of reinforcing walls. In the present embodiment, the number of the arc-shaped mouth-end walls 12 is six, and the number of the reinforcing walls is six, it should be understood that the number of the arc-shaped mouth-end walls 12 and the number of the reinforcing walls may also be five, seven, eight, or other suitable numbers.

The arc-shaped spigot walls 12 are perpendicular to the rear base plate main body 13 and distributed in an annular array, and each arc-shaped spigot wall 12 abuts against the inner wall of the center of the framework 3 to ensure the installation accuracy of the rear base plate 2. The reinforcing wall connects two adjacent curved finish walls 12 and lies within an imaginary circle in which the curved finish walls 12 lie. In this embodiment, the reinforcing walls are generally u-shaped, and include first sub-reinforcing walls 14 and second sub-reinforcing walls 15, the first sub-reinforcing walls 14 are distributed in a circular array around the center of an imaginary circle where the arc-shaped stop wall 12 is located, and two ends of the second sub-reinforcing walls 15 are respectively connected to the ends of the adjacent first sub-reinforcing walls 14 and the ends of the adjacent arc-shaped stop walls 12. It should be understood that the reinforcing wall may take other suitable shapes and configurations.

The reinforcing wall forms an inclination angle with the rear floor main body 13. In this embodiment, the angle between the reinforcing wall and the rear base plate main body 13 is 135 °. It should be understood that the angle between the reinforcing wall and the rear floor main body 13 may also be other suitable angles, such as 120 °, 140 °, 150 °, etc. The reinforcing wall can keep thicker wall thickness, and effectively improves the mechanical strength of the boss 11, so that the boss 11 is prevented from breaking and falling off when bearing axial load.

Returning to fig. 1, the bosses 11 of the motor housing 1 and the rear base plate 2 are provided with bearing mounting holes 16, and the rotating shaft 7 is supported by bearings 17 mounted on the bosses 11 of the motor housing 1 and the rear base plate 2. In this embodiment, the bearing 17 is an oil-retaining bearing, and is mounted on the motor housing 1 and the rear base plate 2 by riveting.

In this embodiment, a graphite gasket 18 sleeved on the rotating shaft 7 is disposed between the bearing 17 and the supporting frame 8. The permanent magnet stepping motor further comprises a front mounting plate 19, and the front mounting plate 19 is welded on the motor shell 1.

In the embodiment of the utility model, the installation accuracy of back bottom plate 2 is guaranteed to the inner wall of 3 center departments of skeleton by 12 butts of the arc tang wall of the boss 11 of back bottom plate 2 to ensure to install in the concentricity in two bearing 17 holes of motor housing 1, the boss 11 of back bottom plate 2. The boss 11 has high mechanical strength and can bear axial load, and the problem that the service life of the permanent magnet stepping motor is influenced by the fact that the boss 11 is broken and falls off in the working process of the permanent magnet stepping motor is avoided.

Claims

1. A permanent magnet stepping motor, comprising:

a motor housing formed with an opening;

2. A permanent magnet stepping motor according to claim 1, wherein: the reinforcing wall is generally U-shaped and comprises a first sub-reinforcing wall and a second sub-reinforcing wall, wherein the first sub-reinforcing wall is distributed in an annular array by taking the center of an imaginary circle where the arc seam allowance wall is located as the center, and two ends of the second sub-reinforcing wall are respectively connected with the tail end of the adjacent first sub-reinforcing wall and the tail end of the adjacent arc seam allowance wall.

3. A permanent magnet stepping motor according to claim 1, wherein: the included angle between the reinforcing wall and the rear bottom plate main body is 135 degrees.

4. A permanent magnet stepping motor according to claim 1, wherein: the rear bottom plate is provided with a limit groove at the edge, and the limit groove is matched with the positioning boss of the framework.

5. A permanent magnet stepping motor according to claim 1, wherein: the rotor assembly further comprises a support frame, and the magnetic ring is sleeved on the support frame and is fixedly connected with the rotating shaft through the support frame.

6. A permanent magnet stepping motor according to claim 5, wherein: and a graphite gasket sleeved on the rotating shaft is arranged between the bearing and the support frame.

7. A permanent magnet stepping motor according to claim 1, wherein: the bearing is an oil bearing and is arranged on the motor shell and the rear bottom plate in a riveting mode.

8. A permanent magnet stepping motor according to any one of claims 1 to 7, wherein: still include preceding mounting panel, preceding mounting panel welds on motor housing.