Glue-free assembling structure of motor magnetic ring

Abstract

The utility model provides a motor magnet ring glue-free assembling structure, a housing of a motor is formed into a cylindrical structure, one end of the housing is formed into a closed end, the other end of the housing is formed into an open end, a magnet ring and the inner side of the housing are molded in a profiling manner, the magnet ring is pushed into the housing from the open end to form a stator, and a fixed projection is formed on the housing wall of the housing. The fixing protrusions are plastically deformed inwards on the basis of the outer surface of the shell to generate protrusion structures, the multiple fixing protrusions are arranged on the circumference of the shell, the inner diameter formed at the top ends of the fixing protrusions is in tight fit with the magnetic ring, and the fixing protrusions are arranged outside the magnetic ring in a relatively clamped mode. The shell and the magnetic ring of the motor are fixedly clamped through the fixing protrusions, the precision requirement for the size of the shell body can be lowered, the requirement for the production process of the shell is lowered, the qualification rate is increased, fixing is achieved through the fixing protrusions, scraping and abrasion to the surface of the magnetic ring can be reduced, and chippings are reduced.

Description

Technical Field

[0001] The utility model relates to an improvement of a motor structure, in particular to a glue-free assembly structure of a motor magnetic ring. Background Art

[0002] The main structures of a motor are a coil and a permanent magnet. Relative rotation work is generated between the coil and the permanent magnet due to electromagnetic induction. When the permanent magnet is used as a stator, it is necessary to fix the permanent magnet inside the motor housing. Usually, the permanent magnet is made into a tile shape and evenly distributed on the circumference, or the permanent magnet is made into a ring shape and integrally nested in the housing. Since the permanent magnet is usually sintered and formed, which is different from the processing method of the housing, there will be a large error during assembly and a tight fit cannot be formed. Therefore, glue or other fixing parts are usually required for fixing, which increases the complexity of the assembly process. In addition, there is usually an outer layer of paint on the magnetic ring, which will form abrasion with the housing during the assembly process, and it is easy to have debris of the paint layer. If these debris remain in the motor, it will affect the rotation of the motor. Therefore, it is necessary to improve the assembly structure. Summary of the Utility Model

[0003] The purpose of the utility model is to overcome the above-mentioned deficiencies existing in the prior art, and to provide a glue-free assembly structure of a motor magnetic ring.

[0004] The technical solution adopted by the utility model to solve the above problems is: the outer shell of the motor is formed into a cylindrical structure, one end of which is formed into a closed end and the other end is formed into an open end. The magnetic ring is formed in imitation of the inner side of the outer shell. The magnetic ring is pushed from the open end into the interior of the outer shell to be combined into a stator. Fixed protrusions are formed on the shell wall of the outer shell. The fixed protrusions are formed by plastic deformation inward with the outer surface of the outer shell as the base to generate a protrusion structure. A plurality of fixed protrusions are arranged circumferentially on the outer shell. The inner diameter formed at the top of the fixed protrusions has a tight fit relationship with the magnetic ring, and the fixed protrusions are relatively clamped outside the magnetic ring. The outer shell and the magnetic ring of the motor are fixedly clamped through the fixed protrusions, and the precision requirement for the size of the outer shell body can be reduced, the production process requirement for the outer shell is reduced, and the qualified rate is improved. Fixing through the fixed protrusions can reduce the abrasion on the surface of the magnetic ring, reduce the generation of debris, is beneficial to improving the cleanliness inside the motor, and improves the working stability of the motor.

[0005] Further, the fixed protrusions are formed into strip-shaped concave structures on the surface of the outer shell. The width of the strip-shaped concave structures is between 0.3 and 1 mm, the length is between 3 and 8 mm, and the depth is between 0.02 and 0.05 mm. The fixed protrusions are obtained by pressing the outer shell, which is convenient for integral processing when forming the outer shell. The fixed protrusions are arranged circumferentially and can be formed into a reliable clamping distance.

[0006] Further, the fixing protrusion is arranged in the middle section in the length direction of the outer shell, and the distance between the fixing protrusion and the closed end is less than the length of the magnetic ring. The fixing position of the fixing protrusion is in the middle section of the outer shell, forming a relatively balanced fixing position, close to the center of gravity of the whole motor, and avoiding the influence of the motor vibration during operation on the fixing effect.

[0007] Further, the fixing protrusion is formed by radially stamping the surface of the outer shell with a stamping device, and the fixing protrusion forms an arc-shaped protrusion surface on the inner surface of the outer shell. The fixing protrusion is formed by one-time processing of the stamping device, and can be integrated with the forming process of the outer shell, improving production efficiency.

[0008] Further, a positioning groove is provided at the open end of the outer shell, and a positioning groove is also opened at the end of the magnetic ring, and the two positioning grooves are arranged correspondingly. The positioning groove is provided to cooperate with the positioning structure in the assembly work, facilitating rapid processing.

[0009] Further, an enlarged ring is formed on the inner edge of the open end of the outer shell, and the enlarged ring is formed by subtractive forming on the outer shell material in the inner diameter direction of the open end. The outer edge of the end of the magnetic ring is formed into a chamfer structure. The function of the enlarged ring is to increase the inner diameter of the end and cooperate with the chamfer on the magnetic ring, facilitating the entry of the magnetic ring into the shell body and improving the assembly efficiency.

[0010] Further, an inward blocking body is formed on the outer surface of the outer shell near the closed end. The blocking body is formed by pressing an inner separating edge from the outer shell, and the edge of the separating edge serves as the cut-off position for fixing the inner end of the magnetic ring. The function of the blocking body is to serve as the innermost position for magnetic ring assembly, facilitating positioning with the rotor and improving the installation accuracy.

[0011] Compared with the prior art, the present utility model has the following advantages and effects: This design is an improvement on the permanent magnet mounting structure on the motor, which can achieve glue-free and fitting-free assembly. The installation steps are simple and effective, the processing accuracy requirements for the outer shell are reduced, the generation of debris can be reduced, the cleanliness of the space inside the motor can be improved, and the quality of the motor can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic side cross-sectional structure diagram of the outer shell.

[0013] Figure 2 It is a schematic cross-sectional structure diagram of the fixing protrusion.

[0014] Figure 3 It is a schematic structure diagram of the magnetic ring.

[0015] In the figure: 1. Outer shell, 2. Open end, 3. Magnetic ring, 4. Fixing protrusion, 5. Positioning groove, 6. Enlarged ring, 7. Blocking body. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] The present utility model will be further described in detail below in conjunction with the accompanying drawings and through embodiments. The following embodiments are explanations of the present utility model, and the present utility model is not limited to the following embodiments.

[0017] A glue-free assembly structure for a motor magnetic ring. The outer shell 1 of the motor is formed into a cylindrical structure, one end of which is formed into a closed end and the other end is formed into an open end 2. The magnetic ring 3 is formed to be conformable to the inner side of the outer shell 1. The magnetic ring 3 is pushed into the interior of the outer shell 1 from the open end 2 to form a stator in combination. Fixed protrusions 4 are formed on the shell wall of the outer shell 1. The fixed protrusions 4 are formed by inward plastic deformation based on the outer surface of the outer shell 1 to produce a protrusion structure. A plurality of fixed protrusions 4 are circumferentially arranged on the outer shell 1. The inner diameter formed at the top of the fixed protrusions 4 has a tight fit relationship with the magnetic ring 3, and the fixed protrusions 4 are relatively clamped outside the magnetic ring 3.

[0018] The fixed protrusions 4 are formed into strip-shaped recessed structures on the surface of the outer shell 1. The width of the strip-shaped recessed structures is between 0.3 - 1 mm, the length is 3 - 8 mm, and the depth is between 0.02 - 0.05 mm.

[0019] The fixed protrusions 4 are arranged in the middle section in the length direction of the outer shell 1, and the distance between the fixed protrusions 4 and the closed end is less than the length of the magnetic ring 3.

[0020] The fixed protrusions 4 are formed by radially stamping the surface of the outer shell 1 with a stamping device, and the fixed protrusions 4 form an arc-shaped protruding surface on the inner surface of the outer shell 1.

[0021] A positioning groove 5 is provided at the open end 2 of the outer shell 1, and a positioning groove 5 is also opened at the end of the magnetic ring 3, and the positioning grooves 5 of the two are correspondingly arranged.

[0022] An enlarged ring 6 is formed at the inner edge of the open end 2 of the outer shell 1. The enlarged ring 6 is formed by material subtraction on the outer shell 1 material from the inner diameter of the open end 2, and the outer edge of the end of the magnetic ring 3 is formed into a chamfer structure.

[0023] An inward stop body 7 is formed on the outer surface of the outer shell 1 near the closed end. The stop body 7 is formed by pressing an inner separating edge from the outer shell 1, and the edge of the separating edge serves as the cut-off position for fixing the inner end of the magnetic ring 3.

[0024] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above-described exemplary embodiments, and the present utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary rather than restrictive. The scope of the present utility model is defined by the claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present utility model. Any reference signs in the claims should not be construed as limiting the claims involved.

[0025] In addition, it should be understood that although this specification is described in accordance with the embodiments, not every embodiment only contains an independent technical solution. This narrative manner of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A motor magnetic ring glue-free assembly structure, characterized in that: The housing (1) of the motor is formed into a cylindrical structure, one end of which is formed into a closed end and the other end is formed into an open end (2). The magnetic ring (3) is molded in a similar manner to the inner side of the housing (1). The magnetic ring (3) is pushed from the open end (2) into the interior of the housing (1) to form a stator. A fixing protrusion (4) is formed on the shell wall of the housing (1). The fixing protrusion (4) is plastically deformed inwardly based on the outer surface of the housing (1) to produce a protruding structure. A plurality of fixing protrusions (4) are arranged on the circumference of the housing (1). The inner diameter formed by the top end of the fixing protrusion (4) is in a tight fit with the magnetic ring (3). The fixing protrusion (4) is relatively clamped and arranged on the outside of the magnetic ring (3).

2. The motor magnetic ring glue-free assembly structure according to claim 1 is characterized in that: The fixing protrusion (4) is formed as a strip-shaped concave structure on the surface of the housing (1); the width of the strip-shaped concave structure is between 0.3 and 1 mm, the length is between 3 and 8 mm, and the depth is between 0.02 and 0.05 mm.

3. The motor magnetic ring glue-free assembly structure according to claim 1 is characterized in that: The fixing protrusion (4) is arranged in the middle section of the housing (1) in the length direction, and the distance between the fixing protrusion (4) and the closed end is smaller than the length of the magnetic ring (3).

4. The motor magnetic ring glue-free assembly structure according to claim 1 is characterized in that: The fixing protrusion (4) is formed by radially punching the surface of the outer shell (1) by a punching device, and the fixing protrusion (4) forms an arc-shaped protruding surface on the inner surface of the outer shell (1).

5. The motor magnetic ring glue-free assembly structure according to claim 1 is characterized in that: The open end (2) of the housing (1) is provided with a positioning groove (5), and the end of the magnetic ring (3) is also provided with a positioning groove (5), and the positioning grooves (5) of the two are arranged correspondingly.

6. The motor magnetic ring glue-free assembly structure according to claim 1 is characterized in that: An enlarged ring (6) is formed on the inner edge of the open end (2) of the outer shell (1), and the enlarged ring (6) is formed by subtracting the material of the outer shell (1) from the inner radial direction of the open end (2). The outer edge of the end of the magnetic ring (3) is formed into a chamfered structure.

7. The motor magnetic ring glue-free assembly structure according to claim 1 is characterized in that: The outer surface of the housing (1) adjacent to the closed end is formed with an inwardly directed blocking body (7), the blocking body (7) being formed by stamping a separation edge inwardly of the housing (1), the edge of the separation edge serving as a cut-off position for fixing the inner end of the magnetic ring (3).

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