A motor magnetic tile and an air suspension motor comprising the same

Abstract

The utility model provides a kind of motor magnetic tile includes and the air suspension motor including it: magnetic body, magnetic body presents arc block structure as a whole, recessed slot is formed in magnetic body inner wall, recessed slot is set symmetrically with the axis of magnetic body around, recessed slot only has one, recessed slot is set in the middle of magnetic body recessed slot one is first notch, another in recessed slot is second notch, first notch is formed by setting in the inner wall of one end of magnetic body, second notch is formed by setting in the inner wall of second end of magnetic body.The motor magnetic tile can reduce the magnetic resistance of magnetic body, reduce the friction torque of magnetic body, reduce the starting current of entire air suspension motor, meet design requirement.

Description

Technical Field

[0001] This utility model relates to the field of motors, specifically to a motor magnet and an air suspension motor containing the magnet. Background Technology

[0002] Chinese patent discloses an ABS motor with application number CN201820487974.0. This ABS motor includes a motor body, which comprises a housing, a frame disposed within the housing for mounting magnets, an end cap that mates with the frame, and a wire sheath connected to the side of the end cap. The frame includes at least two axially corresponding annular frames, with multiple identical connecting rods axially parallel and evenly spaced between adjacent annular frames. Each connecting rod has an arc-shaped cross-section and is concentrically arranged with the annular frames. The connecting rods create multiple magnet mounting areas between adjacent annular frames. The magnets are fixed within these mounting areas by the frame.

[0003] Although the ABS motor described above can prevent the magnetic tiles from shaking during operation by fixing them to the frame, the ABS motor still has a drawback: because the magnetic tiles are in the form of a whole arc block structure, the starting current is relatively large. Summary of the Invention

[0004] This utility model aims to provide a motor magnet and an air suspension motor containing the magnet, solving the problem that the existing magnet has a whole arc block structure, resulting in a large starting current.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: This utility model first discloses a motor magnet, including: a magnetic body, the magnetic body having an overall arc block structure, the inner wall of the magnetic body having a groove formed by a recess, the groove being symmetrically arranged around the axis around which the magnetic body is surrounded.

[0006] Preferably, there is only one notch, which is located in the middle of the magnetic body.

[0007] Preferably, one of the slots is a first notch, and the other slot is a second notch. The first notch is formed by opening the inner wall of one end of the magnetic body, and the second notch is formed by opening the inner wall of the second end of the magnetic body.

[0008] The present invention also discloses an air suspension motor, comprising: a motor magnet as described above.

[0009] Preferably, the air suspension motor further includes: a rotor, with magnets surrounding the rotor; the rotor includes: a slot frame, enameled wire, and a stamped sheet, the slot frame being fastened to the stamped sheet; the slot frame wraps around the stamped sheet, a winding arm is formed on the slot frame, the winding arm is used for winding enameled wire, a first winding surface and a second winding surface are formed on the outer surface of the winding arm, the first winding surface is perpendicular to the centerline of the slot frame, the second winding surface is parallel to the centerline of the slot frame, the first winding surface and the second winding surface are connected by an intermediate guide surface, and the inner wall of the winding arm forms a chamfered surface facing the intermediate guide surface.

[0010] Preferably, the chamfered surface includes a first L-shaped surface and a second L-shaped surface, which are arranged adjacent to each other and are both located at the corner of the inner wall of the winding arm.

[0011] Compared with the prior art, this utility model has the following beneficial effects: Since the position of the magnetic body inside the motor housing is fixed, and the position and size of other components near the magnetic body are fixed, in order to achieve a fixed air gap between the magnetic body and other components, the original thickness of the magnetic body cannot be changed (that is: the outer diameter and inner diameter of the magnetic body cannot be changed). This application achieves the following objectives by opening the first and second notches while maintaining the original thickness of the magnetic body: ① reducing the magnetic resistance of the magnetic body; ② reducing the frictional torque of the magnetic body; ③ reducing the starting current of the entire air suspension motor, thus meeting the design requirements.

[0012] Other advantages, objectives and features of this invention will be partly apparent from the following description, and partly understood by those skilled in the art through study and practice of this invention. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of the motor magnet of this utility model when a slot is missing.

[0014] Figure 2 This is a schematic diagram of the structure of the motor magnet of this utility model when there are two missing slots.

[0015] Figure 3 The graph shows the test data of the starting current of the entire motor magnet with and without missing slots.

[0016] Figure 4 This is a diagram showing the distribution of the magnetic field strength of the entire motor's magnetic tile when there are missing slots and when there are no missing slots.

[0017] Figure 5 This is a schematic diagram of the rotor.

[0018] Figure 6 This is a schematic diagram of the rotor structure after the slot frame is opened.

[0019] Figure 7 for Figure 6 Enlarged view of point A in the middle.

[0020] Reference numerals: slot frame 1, first winding surface 11, second winding surface 12, chamfered surface 13, first L-shaped surface 131, second L-shaped surface 132, first baffle 15, second baffle 16, stamped sheet 2, magnetic body 3, notched slot 30. Detailed Implementation

[0021] To make the technical means, creative features, achieved objectives and functions of this utility model clearer and easier to understand, the utility model will be further described below with reference to the accompanying drawings and specific embodiments: This embodiment first discloses a motor magnet, including: a magnetic body 3, the magnetic body 3 having an overall arc block structure, and a groove 30 formed by a recess in the inner wall of the magnetic body 3, the groove 30 being symmetrically arranged around the axis around which the magnetic body 3 is located.

[0022] like Figure 1 As shown, there is only one notch 30, which is located in the middle of the magnetic body 3. Although this can reduce the magnetic resistance of the magnetic body 3, the large notch 30 in the middle of the magnetic body 3 results in lower overall strength of the magnetic body 3, making it prone to breakage.

[0023] like Figure 2 As shown, one of the notches 30 is a first notch, and the other is a second notch. The first notch is formed by opening the inner wall at one end of the magnetic body 3, and the second notch is formed by opening the inner wall at the second end of the magnetic body 3. Compared with the embodiment with only one notch 30, this embodiment maintains a higher strength for the entire magnetic body 3, making it less prone to breakage.

[0024] The following explains "③ Reduce the starting current of the entire air suspension motor": For example... Figure 3 As shown, it can be seen that the starting current changes before and after the notch 30 is opened, and the result is that the starting current is reduced.

[0025] The inner walls of both the first and second notches are circular arc structures. This ensures a uniform magnetic field distribution. Please see... Figure 4 We can see the distribution of magnetic field strength before and after the opening of the first and second gaps. It can be seen that the opening of the first and second gaps did not cause a significant increase in the magnetic field strength at any point. Therefore, the opening of the first and second gaps is reasonable.

[0026] This embodiment also discloses an air suspension motor, including: a motor magnet as described above.

[0027] like Figures 5 to 7As shown, the air suspension motor further includes: a rotor, with magnets surrounding the rotor; the rotor includes: a slot frame 1, enameled wire, and a stamped sheet 2, the slot frame 1 being fastened to the stamped sheet 2; the slot frame 1 is wrapped around the stamped sheet 2, a winding arm is formed on the slot frame 1, the winding arm is used for winding enameled wire, a first winding surface 11 and a second winding surface 12 are formed on the outer surface of the winding arm, the first winding surface 11 is perpendicular to the axis of the slot frame 1, the second winding surface 12 is parallel to the axis of the slot frame 1, the first winding surface 11 and the second winding surface 12 are connected by an intermediate guide surface, and a chamfered surface 13 is formed on the inner wall of the winding arm that is directly opposite the intermediate guide surface. Because the basic shape of the winding arm is a cuboid structure, enameled wire needs to be wound on the winding arm. After winding, the enameled wire bends at the middle guide surface. The enameled wire is subjected to greater tensile force at the middle guide surface, so the enameled wire is prone to breakage at the middle guide surface. The middle guide surface is an arc structure, and the slot frame 1 is made of insulating material. When the wall of the winding arm at the middle conductor surface is thin, the enameled wire is prone to leakage to the stamping plate 2 after damage. Voltage on the stamping plate 2 is not allowed, which makes the entire air suspension motor very prone to leakage, and there is a certain risk of leakage. This application breaks away from the traditional approach of having a thinner wall thickness for the winding arm at the intermediate conductor surface. Instead, a chamfered surface 13 is formed on the inner wall of the winding arm, directly opposite the intermediate guide surface. This chamfered surface 13 design results in a thicker wall for the winding arm at the intermediate conductor surface. Therefore, if the enameled wire is damaged, the thicker wall of the winding arm at the intermediate conductor surface will prevent leakage to the stamping plate 2, reducing the risk of leakage in the entire air suspension motor and improving the overall quality of the air suspension motor.

[0028] The chamfered surface 13 includes a first L-shaped surface 131 and a second L-shaped surface 132, which are arranged adjacent to each other. Both the first L-shaped surface 131 and the second L-shaped surface 132 are located at the corner of the inner wall of the winding arm. Ideally, the chamfered surface 13 includes both the first L-shaped surface 131 and the second L-shaped surface 132. However, the chamfered surface 13 can also be a small-diameter arc surface or an L-shaped surface. The arrangement of the first L-shaped surface 131 and the second L-shaped surface 132 makes the wall of the winding arm at the middle conductor surface thicker.

[0029] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A type of motor magnet, characterized in that, include: The magnetic body (3) has an overall arc block structure. The inner wall of the magnetic body (3) is recessed to form a notch (30). The notch (30) is symmetrically arranged around the axis of the magnetic body (3).

2. The motor magnet according to claim 1, characterized in that, There is only one slot (30), which is located in the middle of the magnetic body (3).

3. The motor magnet according to claim 1, characterized in that, One of the slots (30) is the first notch, and the other slot (30) is the second notch. The first notch is formed by opening the inner wall of one end of the magnetic body (3), and the second notch is formed by opening the inner wall of the second end of the magnetic body (3).

4. An air suspension motor, characterized in that, include: A motor magnet as described in any one of claims 1 to 3.

5. The air suspension motor according to claim 4, characterized in that, Also includes: The rotor is surrounded by magnetic tiles. The rotor includes: slot frame (1), enameled wire and stamped sheet (2), with the slot frame (1) fastened to the outside of the stamped sheet (2); The slot frame (1) is wrapped around the stamping sheet (2). A winding arm is formed on the slot frame (1). The winding arm is used to wind enameled wire. A first winding surface (11) and a second winding surface (12) are formed on the outer surface of the winding arm. The first winding surface (11) is perpendicular to the axis of the slot frame (1), and the second winding surface (12) is parallel to the axis of the slot frame (1). The first winding surface (11) and the second winding surface (12) are connected by an intermediate guide surface. A chamfered surface (13) is formed on the inner wall of the winding arm that is directly opposite to the intermediate guide surface.

6. The air suspension motor according to claim 5, characterized in that, The chamfered surface (13) includes a first L-shaped surface (131) and a second L-shaped surface (132). The first L-shaped surface (131) and the second L-shaped surface (132) are arranged adjacent to each other. Both the first L-shaped surface (131) and the second L-shaped surface (132) are located at the corner of the inner wall of the winding arm.

Images