Novel stator frame and direct current motor

Abstract

The utility model discloses a novel stator frame and a direct current motor, which comprise a front shell, a rear seat body, a motor shaft and a rotor assembly, the motor shaft is connected with the rotor assembly, the rotor assembly is rotatably arranged on the rear seat body, the stator frame is fixedly arranged on the front shell, and a plurality of magnet blocks are fixedly arranged on installation positions of the stator frame. The bent lugs on the left side and the right side of the installation position are turned over oppositely, and the magnet block is fixed to the installation position through the bent lugs. According to the utility model, the magnet blocks are fixed at the stator frame through the bending lugs, so that a more stable mechanical structure is provided, and the magnet blocks do not fall off after being used for a long time.

Description

Technical Field

[0001] The utility model relates to the technical field of DC motors, in particular to a novel stator frame and a DC motor. Background Art

[0002] Brushless DC motors are widely used in the fields of robots, aircraft models, etc. due to their excellent speed regulation performance, high reliability and low noise. The stator part of the brushless DC motor includes a stator frame and a magnet block. In existing brushless DC motors, the shape of the magnet block is usually arc-shaped, square-shaped or bread-shaped. The stator frame is a simple annular shape, and the magnet block is mostly directly pasted on the stator frame. The pasting method is not limited by the shape and specifications of the magnet block, and the contact surface between the magnet block and the stator frame can be tightly fitted. However, after the motor has been used for a long time, the magnets pasted on the stator frame are prone to fall off, affecting the long-term quality of the motor. Utility Model Content

[0003] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a novel stator frame and a DC motor.

[0004] To achieve the above-mentioned purpose, the utility model adopts the following technical solution: a new type of stator frame, including an outer ring body, the inner wall of the outer ring body is provided with a plurality of mounting positions for mounting magnet blocks, each of the mounting positions is provided with a limiting side plate portion on the left and right sides, the limiting side plate portion is provided with a bending ear on the upper and lower sides, the width D1 of the bending ear is smaller than the width D2 of the magnet block, and the two adjacent limiting side plates are arranged to be inclined relative to each other.

[0005] A DC motor comprises a stator frame, a front housing, a rear housing, a motor shaft and a rotor assembly, wherein the motor shaft is connected to the rotor assembly, the rotor assembly is rotatably arranged on the rear housing, the stator frame is fixedly arranged on the front housing, a plurality of magnet blocks are fixedly installed on the mounting position of the stator frame, the bending ears on the left and right sides of the mounting position are folded towards each other, and the magnet blocks are fixed to the mounting position by the bending ears.

[0006] It is further explained that the rotor assembly includes a rotor core and a plurality of coil windings wound around the rotor core, the rotor core includes a plurality of external convex wire frames, and the coil windings are wound around the external convex wire frames of the rotor core.

[0007] It is further explained that a bearing component is disposed in the rear seat body, and the motor shaft is rotatably disposed on the bearing component.

[0008] It is further explained that a limiting ring piece and a limiting screw are provided at one end of the motor shaft located at the rear seat body, and the limiting screw passes through the limiting ring piece and is connected to the motor shaft.

[0009] The beneficial effect of the utility model is that the magnet block of the utility model is fixed at the stator frame by the bending ears, so as to have a more stable mechanical structure, and the magnet block will not fall off after long-term use. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is a structural cross-sectional view of a DC motor.

[0011] Figure 2 This is a schematic diagram of the structure of a DC motor.

[0012] Figure 3 This is a schematic diagram of the structural decomposition of a DC motor.

[0013] Figure 4 This is a schematic diagram of the structural decomposition of the magnet block at the stator frame.

[0014] Figure numbers: 10, stator frame; 11, outer ring body; 12, installation position; 13, limiting side plate; 14, bending ear; 20, magnet block; 30, front shell; 40, rear seat body; 50, motor shaft; 60, rotor assembly; 61, rotor core; 611, outer convex wire frame; 62, coil winding; 70, bearing; 80, limiting ring; 90, limiting screw. DETAILED DESCRIPTION

[0015] In order to make the purpose, technical solutions and advantages of the utility model clearer, the utility model will be further described in detail below with reference to the accompanying drawings.

[0016] Combined with Figure 4 As shown, a new type of stator frame 10 includes an outer ring body 11, and a plurality of mounting positions 12 for mounting magnet blocks 20 are provided on the inner wall of the outer ring body 11. A limiting side plate portion 13 is provided on the left and right sides of each mounting position 12, and a bending ear 14 is provided on the upper and lower sides of the limiting side plate portion 13. The width D1 of the bending ear 14 is smaller than the width D2 of the magnet block 20, and two adjacent limiting side plates 13 are arranged to be inclined relative to each other. When the magnet block 20 is installed at the stator frame 10, the bending ear 14 on the lower side of the limiting side plate portion 13 is first folded to support the magnet block 20 inserted into the mounting position 12, and then the bending ear 14 on the upper side of the limiting side plate portion 13 is folded. After the magnet block 20 is assembled, the stator frame 10 is as shown in the attached figure. Figure 3 shown.

[0017] Combined with Figure 1 To Attachment Figure 3As shown, a DC motor includes a stator frame 10, a front housing 30, a rear housing 40, a motor shaft 50, and a rotor assembly 60. The motor shaft 50 is connected to the rotor assembly 60. When the rotor assembly 60 rotates, it can drive the motor shaft 50 to rotate synchronously. The rotor assembly 60 is specifically rotatably arranged on the rear housing 40, and the stator frame 10 is fixedly arranged on the front housing 30.

[0018] A plurality of magnet blocks 20 are fixedly mounted on the mounting position 12 of the stator frame 10, and the bending ears 14 on the left and right sides of the mounting position 12 are folded toward each other, and the magnet blocks 20 are fixed to the mounting position 12 by the bending ears 14. Figure 3 As shown, a plurality of magnet blocks 20 are circumferentially distributed at the stator frame 10 at equal intervals. Compared with the method of attaching the magnet blocks to the stator frame in the existing DC motor, the magnet blocks 20 of the utility model are fixed at the stator frame 10 by bending ears 14, so as to have a more stable mechanical structure, and the magnet blocks 20 will not fall off after long-term use.

[0019] Combined with Figure 1 and attached Figure 3 As shown, the rotor assembly 60 includes a rotor core 61 and a plurality of coil windings 62 wound around the rotor core 61 . The rotor core 61 includes a plurality of external convex wire frames 611 . The coil windings 62 are wound around the external convex wire frames 611 of the rotor core 61 .

[0020] Combined with Figure 1 To Attachment Figure 3 As shown, a bearing 70 is disposed in the rear seat body 40, and the motor shaft 50 is rotatably disposed on the bearing 70. A limiting ring piece 80 and a limiting screw 90 are disposed at one end of the motor shaft 50 located at the rear seat body 40, and the limiting screw 90 passes through the limiting ring piece 80 and is connected to the motor shaft 50. Figure 1 As shown, the limit ring piece 80 is specifically clamped between the bearing member 70 and the limit screw 90. After the motor shaft 50 is inserted into the front housing 30, the limit ring piece 80 is locked in by the limit screw 90. The limit ring piece 80 limits the motor shaft 50 to prevent the motor shaft 50 from axial movement.

[0021] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0022] It should be understood that the terms "first", "second", etc. are used in the present invention to describe various information, but these information should not be limited to these terms, and these terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present invention, "first" information may also be referred to as "second" information, and similarly, "second" information may also be referred to as "first" information.

[0023] The above description does not limit the technical scope of the present invention. Any modification, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A novel stator frame, comprising an outer ring body (11), wherein the inner wall of the outer ring body (11) is provided with a plurality of mounting positions (12) for mounting magnet blocks (20), characterized in that: Each of the mounting positions (12) is provided with a limiting side plate portion (13) on the left and right sides, and the limiting side plate portion (13) is provided with a bending ear (14) on the upper and lower sides, the width D1 of the bending ear (14) is smaller than the width D2 of the magnet block (20), and two adjacent limiting side plate portions (13) are arranged to be inclined relative to each other.

2. A DC motor, comprising the stator frame according to claim 1, characterized in that: The invention also comprises a front housing (30), a rear housing (40), a motor shaft (50), and a rotor assembly (60), wherein the motor shaft (50) is connected to the rotor assembly (60), the rotor assembly (60) is rotatably arranged on the rear housing (40), the stator frame (10) is fixedly arranged on the front housing (30), a plurality of magnet blocks (20) are fixedly installed on the installation position (12) of the stator frame (10), the bending ears (14) on the left and right sides of the installation position (12) are folded towards each other, and the magnet blocks (20) are fixed to the installation position (12) by the bending ears (14).

3. A DC motor according to claim 2, characterized in that: The rotor assembly (60) comprises a rotor core (61) and a plurality of coil windings (62) wound around the rotor core (61); the rotor core (61) comprises a plurality of external convex wire frames (611); and the coil windings (62) are wound around the external convex wire frames (611) of the rotor core (61).

4. A DC motor according to claim 2, characterized in that: A bearing component (70) is provided in the rear seat body (40), and the motor shaft (50) is rotatably disposed on the bearing component (70).

5. A DC motor according to claim 4, characterized in that: A limiting ring piece (80) and a limiting screw (90) are provided at one end of the motor shaft (50) located on the rear seat body (40); the limiting screw (90) passes through the limiting ring piece (80) and is connected to the motor shaft (50).

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