Matching structure of stator and rotor of motor

Abstract

The utility model provides a matching structure of a stator and a rotor of a motor, which comprises a shell and two winding frameworks, the winding frameworks are coaxially arranged in the shell along the front-back direction, and the winding frameworks are provided with coils wound along the circumferential direction; the two magnetic conductive ring frames are respectively arranged in the two winding frameworks and are used for generating corresponding magnetic fields according to the power-on state of the coil; the rotor assembly comprises a rotor sleeve and two magnetic rings, the two magnetic rings are connected to the front end and the rear end of the rotor sleeve in a sleeving mode respectively, and the middle of the rotor sleeve is rotationally connected to the interior of the magnetic conductive ring frame through a bearing. According to the scheme, the two winding frameworks and the two magnetic conductive ring frames are designed to serve as stator pieces, each winding framework is wound with the corresponding coil, the two magnetic conductive ring frames generate corresponding magnetic fields after the coils are powered on, and then rotation of the rotor sleeve is achieved; and the rotor sleeve can be rotatably connected to the interiors of the two magnetic conductive ring frames through the bearing in the middle, so that not only is the installation precision ensured, but also the stability is good.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, and in particular to a matching structure of a stator and a rotor of a motor. Background Art

[0002] The main structure of the dimming stepper motor includes a push rod with a screw segment, a stator component with a coil and a rotor component with magnetic material. The lead end of the coil is connected to the circuit board of the socket by welding, so that when the circuit board energizes the coil, a corresponding magnetic field is generated in the stator component, driving the rotor component to rotate; the rotor component has an axial screw hole, the threaded segment of the push rod is screwed to the screw hole, and the shell has a slide groove that limits the rotation of the push rod around its own axis, thereby driving the linear movement of the push rod relative to the shell through the rotation of the rotor component.

[0003] Most existing dimming stepper motors integrate the stator component in the housing, and then insert the rotor component into the interior of the stator component. However, under this assembly method, it is difficult to ensure the installation accuracy of the rotor component relative to the stator component, resulting in unstable quality of the finished product. Utility Model Content

[0004] The utility model aims to solve the problem that it is difficult to ensure the installation accuracy of the stator component and the rotor component in the dimming stepping motor of the prior art.

[0005] In order to solve the above problems, the utility model provides a matching structure of a stator and a rotor of a motor, including a housing, and also including:

[0006] Two winding frames are coaxially arranged in the housing along the front-back direction, and the winding frames are provided with coils wound along the circumferential direction.

[0007] Two magnetic conductive ring frames are respectively installed inside the two winding skeletons and are used to generate corresponding magnetic fields according to the power-on state of the coils;

[0008] The rotor assembly includes a rotor sleeve and two magnetic rings, the two magnetic rings are respectively sleeved on the front end and the rear end of the rotor sleeve, and the positions of the two magnetic rings correspond to the positions of the two magnetic conductive ring frames respectively, and the middle part of the rotor sleeve is rotatably connected to the inside of the magnetic conductive ring frame through a bearing.

[0009] Compared with the prior art, the above scheme designs two winding skeletons and two magnetic ring frames as stator parts, each winding skeleton is wound with a coil, and the two magnetic ring frames generate corresponding magnetic fields when the coil is energized, so that the magnetic rings on the rotor sleeve drive the rotation of the rotor sleeve under the action of the magnetic field; the rotor sleeve can be rotatably connected to the inside of the two magnetic ring frames through the middle bearing, which not only ensures the installation accuracy but also has good stability.

[0010] As a preferred solution, the magnetic ring frame includes an annular receiving plate and a plurality of pole pieces distributed along the circumference of the receiving plate. The receiving plates of the two magnetic ring frames are fitted and connected to each other, and the pole pieces are respectively located on opposite sides of the two receiving plates, thereby making the layout reasonable and the structure compact.

[0011] As a preferred embodiment, the front and rear parts of the shell are respectively provided with magnetic conductive rings, and the magnetic conductive ring frame and the magnetic conductive ring are both provided with pole pieces distributed along the circumferential direction, wherein the pole pieces of the magnetic conductive ring at the front of the shell are arranged alternately with the pole pieces of the magnetic conductive ring frame located on the front side, and the pole pieces of the magnetic conductive ring at the rear of the shell are arranged alternately with the pole pieces of the magnetic conductive ring frame located on the rear side, so that after the coil is energized, the magnetic conductive ring frame and the magnetic conductive ring can generate a stronger magnetic field inside the shell.

[0012] As a preferred solution, the inner circumferential walls of the two receiving plates are provided with a plurality of circumferentially distributed claws, and the bearing is confined between the claws of the two receiving plates, thereby effectively improving the connection stability between the magnetic ring frame, the bearing and the rotor sleeve.

[0013] As a preferred solution, mutually complementary positioning protrusions and positioning holes are provided on opposite sides of the two receiving plates, so as to achieve precise assembly between the two magnetic conductive ring frames.

[0014] As a preferred embodiment, the front and rear ends of the rotor sleeve are respectively provided with annular step grooves for connecting the magnetic ring, the inner circumferential wall of the magnetic ring is provided with a key, and the annular step groove is provided with a keyway for interference fit of the key, so as to realize circumferential fixation of the rotor sleeve and the magnetic ring; a raised hook is provided on the side of the annular step groove away from the middle of the rotor sleeve, and the hook abuts against the magnetic ring to realize axial fixation of the magnetic ring, thereby ensuring the connection stability between the rotor sleeve and the magnetic ring, avoiding loosening and falling off between the rotor sleeve and the magnetic ring, and facilitating assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic cross-sectional view of the matching structure of a stator and a rotor of a motor;

[0016] Figure 2 for Figure 1 A partial enlarged schematic diagram of the middle Y region;

[0017] Figure 3 A schematic diagram of the coordination of two winding skeletons and a rotor assembly of a coordination structure of a stator and a rotor of a motor;

[0018] Figure 4 A schematic diagram of the structure of two winding bobbins of a matching structure of a stator and a rotor of a motor;

[0019] Figure 5 A schematic diagram of the structure of a rotor assembly of a stator and a rotor of a motor;

[0020] Figure 6 Schematic diagram a of the positions of the magnetic conductive ring and the magnetic conductive ring frame of the matching structure of the stator and the rotor of a motor (corresponding to the rear of the housing);

[0021] Figure 7 The schematic diagram b (corresponding to the front of the shell) shows the positions of the magnetic conductive ring and the magnetic conductive ring frame of the matching structure of the stator and the rotor of a motor.

[0022] Description of reference numerals:

[0023] 1. Shell; 2. Winding frame; 21. Terminal block; 22. Terminal slot; 3. Coil; 4. Bearing; 51. Magnetic ring frame; 511. Receiving plate; 512. Positioning protrusion; 513. Positioning hole; 52. Magnetic ring; 53. Pole piece; 54. Claw; 6. Rotor assembly; 61. Rotor sleeve; 61b. Keyway; 61c. Annular step groove; 61d. Hook; 62. Magnetic ring; 62a. Key. DETAILED DESCRIPTION

[0024] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the technical solutions in the embodiments of the utility model will be clearly and completely described below in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. It should also be noted that all directional indications in the embodiments of the utility model (such as up, down, left, right, front, back, inside, outside) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the drawings). If the specific posture changes, the directional indication will also change accordingly.

[0025] See also Figure 1-Figure 7 The embodiment of the utility model provides a matching structure of a stator and a rotor of a motor, comprising a housing 1, and further comprising:

[0026] Two winding skeletons 2 are coaxially arranged in the housing 1 along the front-back direction. The winding skeleton 2 is provided with a coil 3 wound along the circumferential direction. The winding skeleton 2 is annular in shape as a whole.

[0027] Two magnetic conductive ring frames 51 are respectively installed inside the two winding skeletons 2, and are used to generate corresponding magnetic fields according to the power-on state of the coil 3;

[0028] The rotor assembly 6 includes a rotor sleeve 61 and two magnetic rings 62. The two magnetic rings 62 are respectively sleeved on the front end and the rear end of the rotor sleeve 61, and the positions of the two magnetic rings 62 correspond to the positions of the two magnetic ring frames 51 respectively. The middle part of the rotor sleeve 61 is rotatably connected to the inside of the magnetic ring frame 51 through the bearing 4.

[0029] The above scheme designs two winding skeletons 2 and two magnetic ring frames 51 as stator parts, and each winding skeleton 2 is wound with a coil 3. After the coil 3 is energized, the two magnetic ring frames 51 generate corresponding magnetic fields, so that the magnetic ring 62 on the rotor sleeve 61 drives the rotor sleeve 61 to rotate under the action of the magnetic field; the rotor sleeve 61 can be rotatably connected to the inside of the two magnetic ring frames 51 through the middle bearing 4, which not only ensures the installation accuracy but also has good stability.

[0030] In this embodiment, the magnetic ring frame 51 includes an annular receiving plate 511 and a plurality of pole pieces 53 distributed along the circumference of the receiving plate 511. The receiving plates 511 of the two magnetic ring frames 51 are fitted and connected to each other, and the pole pieces 53 are respectively located on the opposite sides of the two receiving plates 511, so that the layout is reasonable and the structure is compact.

[0031] Furthermore, the inner circumferential walls of the two receiving plates 511 are provided with a plurality of circumferentially distributed claws 54, wherein the claws 54 of the receiving plate 511 located on the front side are bent forward, and the claws 54 of the receiving plate 511 located on the rear side are bent backward, and the bearing 4 is confined between the claws 54 of the two receiving plates 511, thereby effectively improving the connection stability among the magnetic ring frame 51, the bearing 4 and the rotor sleeve 61.

[0032] Combination Figure 6 and Figure 7 As shown, as an improvement to the present embodiment, magnetic conductive rings 52 are respectively provided at the front and rear of the shell 1, and the magnetic conductive rings 52 are provided with pole pieces 53 distributed along the circumferential direction, wherein the pole pieces 53 of the magnetic conductive rings 52 at the front of the shell 1 are arranged alternately with the pole pieces 53 of the magnetic conductive ring frame 51 located at the front side, and the pole pieces 53 of the magnetic conductive rings 52 at the rear of the shell 1 are arranged alternately with the pole pieces 53 of the magnetic conductive ring frame 51 located at the rear side, so that after the coil is energized, the magnetic conductive ring frame 51 and the magnetic conductive rings 52 can generate a strong magnetic field inside the shell 1.

[0033] In order to improve the assembly accuracy between the two receiving plates 511 , complementary positioning protrusions 512 and positioning holes 513 are provided on opposite sides of the two receiving plates 511 , thereby achieving accurate assembly between the two magnetic conductive ring frames 51 .

[0034] Combination Figure 3 and Figure 5As shown, the rotor assembly 6 is rotatably connected to the inside of the magnetic ring frame 51 through the bearing 4, and the front and rear ends of the rotor sleeve 61 are respectively provided with annular step grooves 61c for connecting the magnetic ring 62, and the inner circumferential wall of the magnetic ring 62 is provided with a key 62a, and the annular step groove 61c is provided with a key groove 61b for interference fit of the key 62a to achieve circumferential fixation of the rotor sleeve 61 and the magnetic ring 62; a raised hook 61d is provided on one side of the annular step groove 61c away from the middle of the rotor sleeve 61, and the hook 61d abuts against the magnetic ring 62 to achieve axial fixation of the magnetic ring 62, thereby ensuring the connection stability between the rotor sleeve 61 and the magnetic ring 62, avoiding loosening and falling off between the rotor sleeve 61 and the magnetic ring 62, and facilitating assembly.

[0035] Although the disclosure is as above, the protection scope of the disclosure is not limited thereto. For those skilled in the art, various changes and modifications can be made without departing from the spirit and scope of the disclosure, and these changes and modifications will fall within the protection scope of the utility model.

Claims

1. A matching structure of a stator and a rotor of a motor, comprising a housing (1), characterized in that: Also includes: Two winding frames (2) are coaxially arranged in the housing (1) along the front-rear direction, and the winding frames (2) are provided with coils (3) wound in the circumferential direction; Two magnetic conductive ring frames (51) are respectively installed inside the two winding skeletons (2) and are used to generate corresponding magnetic fields according to the power-on state of the coil (3); The rotor assembly (6) comprises a rotor sleeve (61) and two magnetic rings (62), wherein the two magnetic rings (62) are respectively sleeved on the front end and the rear end of the rotor sleeve (61), and the positions of the two magnetic rings (62) respectively correspond to the positions of the two magnetic conductive ring frames (51), and the middle part of the rotor sleeve (61) is rotatably connected to the inside of the magnetic conductive ring frame (51) via a bearing (4).

2. The matching structure of the stator and rotor of a motor according to claim 1, characterized in that: The magnetic conductive ring frame (51) comprises an annular receiving disk (511) and a plurality of pole pieces (53) distributed along the circumference of the receiving disk (511); the receiving disks (511) of the two magnetic conductive ring frames (51) are fitted and connected to each other, and the pole pieces (53) are respectively located on opposite sides of the two receiving disks (511).

3. The matching structure of the stator and rotor of a motor according to claim 2, characterized in that: The front and rear parts of the shell (1) are respectively provided with magnetic conductive rings (52), and the magnetic conductive rings (52) are provided with pole pieces (53) distributed along the circumferential direction, wherein the pole pieces (53) of the magnetic conductive rings (52) at the front of the shell (1) and the pole pieces (53) of the magnetic conductive ring frame (51) located at the front side are arranged in an alternating manner, and the pole pieces (53) of the magnetic conductive rings (52) at the rear of the shell (1) and the pole pieces (53) of the magnetic conductive ring frame (51) located at the rear side are arranged in an alternating manner.

4. The matching structure of the stator and rotor of a motor according to claim 2, characterized in that: The inner peripheral walls of the two receiving plates (511) are provided with a plurality of circumferentially distributed claws (54), and the bearing (4) is confined between the claws (54) of the two receiving plates (511).

5. The matching structure of the stator and rotor of a motor according to claim 2, characterized in that: Positioning protrusions (512) and positioning holes (513) that complement each other are provided on opposite sides of the two receiving plates (511).

6. The matching structure of the stator and rotor of a motor according to claim 1, characterized in that: The front end and the rear end of the rotor sleeve (61) are respectively provided with an annular step groove (61c) for connecting with the magnetic ring (62); the inner peripheral wall of the magnetic ring (62) is provided with an insertion key (62a); the annular step groove (61c) is provided with a key groove (61b) for interference fit of the insertion key (62a) to achieve circumferential fixation of the rotor sleeve (61) and the magnetic ring (62); a protruding hook (61d) is provided on one side of the annular step groove (61c) away from the middle of the rotor sleeve (61); the hook (61d) abuts against the magnetic ring (62) to achieve axial fixation of the magnetic ring (62).

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