Rotor of a brake motor and brake motor

Abstract

The utility model relates to a rotor of brake motor and brake motor, rotor includes cup -shaped rotating shaft and a plurality of magnetic steel, a plurality of magnetic steel are embedded in one circular injection body, and the inner diameter of injection body is tightly fitted with the outer diameter of cup -shaped rotating shaft, and the injection body is sleeved on the outer wall of cup -shaped rotating shaft and is bonded with cup -shaped rotating shaft. Brake motor adopts above -mentioned rotor. The utility model embeds the magnetic steel in advance with injection body as a whole to ensure the relative position relation between each magnetic steel constant, then the injection body and magnetic steel are pressed together and are connected to the outer wall of cup -shaped rotating shaft, and the angle of cup -shaped rotating shaft or magnetic steel does not need to adjust in the process of pressing, reduces assembly process difficulty, improves the reliability of finished product, improves product yield.

Description

Technical Field

[0001] This utility model belongs to the field of motor technology, specifically relating to a rotor of a brake motor and a brake motor. Background Technology

[0002] Currently, the rotors of one-box brake motors generally adopt a cup-shaped shaft, magnets, and steel sleeve bonded together structure. The outer wall of the cup-shaped shaft needs to be machined with magnet slots to position the magnets, as disclosed in Chinese invention patent CN221509285U. This significantly increases the processing cost of the cup-shaped shaft. Furthermore, the steel sleeve in this rotor structure is difficult to assemble, and its thin wall makes it prone to deformation during assembly, resulting in irregular rotor dimensions and affecting the overall quality and rotational stability of the finished rotor. Therefore, it is necessary to provide a rotor that solves the technical problems of high processing cost, difficult assembly, and low yield of current rotor structures. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a rotor for a brake motor, thereby solving the technical problems of high processing cost and difficult assembly of conventional brake motor rotors.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a rotor of a brake motor, including a cup-shaped rotating shaft and a plurality of magnets that are circumferentially discretely distributed on the outer wall of the cup-shaped rotating shaft. The plurality of magnets are embedded in a circular injection molded body. The inner diameter of the injection molded body is tightly fitted with the outer diameter of the cup-shaped rotating shaft. The injection molded body is sleeved on the outer wall of the cup-shaped rotating shaft and bonded to the cup-shaped rotating shaft.

[0005] As a preferred embodiment, the inner wall of the injection molded body is round and smooth, and the outer wall of the cup-shaped rotating shaft is round and smooth.

[0006] As a preferred embodiment, the axial length of the injection molded body is consistent with the length of the magnet, and openings corresponding to the magnets are provided on the annular end faces at both ends of the injection molded body.

[0007] As a preferred option, the injection molded body is injection molded from PPS colloidal material, and the injection molded body is integrally injection molded with multiple magnets.

[0008] As a preferred embodiment, the upper end of the cup-shaped shaft is radially tapered and connected to an upwardly extending journal section, which is used to connect a bearing. A positioning ring is fitted onto the cup-shaped shaft located below the injection molded body. The positioning ring abuts against the lower end of the injection molded body and is fixedly connected to the outer wall of the cup-shaped shaft to limit the axial position of the injection molded body.

[0009] The further technical problem to be solved by this utility model is to provide a brake motor that solves the problem of high manufacturing cost of conventional brake motors.

[0010] To solve this technical problem, the technical solution adopted by this utility model is: a brake motor, including the rotor mentioned above.

[0011] The beneficial effects of this utility model are as follows: This utility model pre-embeds the magnets into the injection molded body to ensure that the relative positional relationship between the magnets is constant. Then, the injection molded body and the magnets are pressed together onto the outer wall of the cup-shaped rotating shaft. The pressing process does not require adjustment of the angle of the cup-shaped rotating shaft or the magnets, which reduces the difficulty of the assembly process, improves the reliability of the finished product, and increases the product yield. Attached Figure Description

[0012] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, wherein: Figure 1 This is a schematic diagram of the rotor assembly structure described in Example 1; Figure 2 This is an exploded structural diagram of the rotor described in Example 1; Figure 1 and Figure 2 In the middle: 1. Cup-shaped rotating shaft; 101. Journal section; 2. Magnet; 3. Injection molded body; 4. Positioning ring. Detailed Implementation

[0013] The specific implementation scheme of this utility model will now be described in detail with reference to the accompanying drawings. Example 1

[0014] like Figure 1 and Figure 2 The rotor of a brake motor shown includes a cup-shaped shaft 1 and a plurality of circumferentially discrete magnets 2 distributed on the outer wall of the cup-shaped shaft 1. The plurality of magnets 2 are embedded in a circular injection-molded body 3. The inner diameter of the injection-molded body 3 is tightly fitted with the outer diameter of the cup-shaped shaft 1. The injection-molded body 3 is sleeved on the outer wall of the cup-shaped shaft 1 and bonded to the cup-shaped shaft 1. The adhesive is 1503 glue, especially EP-1503 structural bonding epoxy glue.

[0015] The inner wall of the injection molded body 3 is round and smooth, and the outer wall of the cup-shaped rotating shaft 1 is round and smooth, so as to ensure that the shape of the outer wall of the injection molded body 3 does not change after assembly with the cup-shaped rotating shaft 1.

[0016] The axial length of the injection molded body 3 is the same as the length of the magnet 2. The annular end faces at both ends of the injection molded body 3 have openings that correspond one-to-one with the magnet 2. The openings are used to position the magnet 2 at both ends by the mold before injection molding, ensuring that each magnet 2 is arranged discretely at equal intervals in the circumference and has the same height, thus ensuring the quality of the insertion of the magnet 2 and the injection molded body 3.

[0017] In this embodiment, the injection-molded body 3 is injection-molded from PPS colloidal material, and the injection-molded body 3 is integrally injection-molded with multiple magnets 2. PPS colloidal material has good high-temperature resistance, insulation properties, and mechanical properties, and can adapt to the operating temperature and centrifugal force in the motor.

[0018] The upper end of the cup-shaped rotating shaft 1 is radially contracted and connected to an upwardly extending journal section 101. The journal section 101 is used to connect the bearing. A positioning ring 4 is sleeved on the cup-shaped rotating shaft 1 located below the injection molded body 3. The positioning ring 4 abuts against the lower end of the injection molded body 3 and is fixedly connected to the outer wall of the cup-shaped rotating shaft 1 to limit the axial position of the injection molded body 3.

[0019] The manufacturing method of the above-mentioned brake motor rotor is as follows: first, the cup-shaped shaft 1 is made by one or more of the following methods: cold drawing, molding, casting, and machining; then, the magnet 2 and the injection molded body 3 are integrally injection molded by the embedding method; and finally, the injection molded body 3 is pressed onto the outer wall of the cup-shaped shaft 1.

[0020] When the magnet 2 is embedded with the injection molded body 3, the two ends of the magnet 2 are positioned by a mold so that the relative positional relationship of each magnet 2 meets the requirements. Example 2

[0021] A brake motor includes the rotor described in Embodiment 1. The remaining structure of this brake motor is prior art, and reference can be made to the brake motor structure disclosed in Chinese Utility Model Patent CN221509285U, which will not be described in detail here.

[0022] The working principle of this invention is as follows: Magnets 2 are pre-molded into the injection molded body 3 to ensure a constant relative positional relationship between the magnets 2. Then, the injection molded body 3 and magnets 2 are pressed together onto the outer wall of the cup-shaped rotating shaft 1. The pressing process does not require adjustment of the angle of the cup-shaped rotating shaft 1 or the magnets 2, reducing assembly difficulty, improving the reliability of the finished product, and increasing product yield. The above embodiments are merely illustrative of the principles and effects of the present invention, as well as some examples of its application, and are not intended to limit the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the inventive concept of the present invention, and these modifications and improvements are all within the scope of protection of the present invention.

Claims

1. A rotor for a brake motor, comprising a cup-shaped shaft (1) and a plurality of circumferentially discrete magnets (2) evenly distributed on the outer wall of the cup-shaped shaft (1), characterized in that, Multiple magnets (2) are embedded in a circular injection body (3). The inner diameter of the injection body (3) is tightly fitted with the outer diameter of the cup-shaped shaft (1). The injection body (3) is sleeved on the outer wall of the cup-shaped shaft (1) and bonded to the cup-shaped shaft (1).

2. The rotor according to claim 1, characterized in that, The inner wall of the injection molded body (3) is round and smooth, and the outer wall of the cup-shaped rotating shaft (1) is round and smooth.

3. The rotor according to claim 1, characterized in that, The axial length of the injection molded body (3) is the same as the length of the magnet (2), and the annular end faces at both ends of the injection molded body (3) are provided with openings that correspond one-to-one with the magnet (2).

4. The rotor according to claim 1, characterized in that, The injection body (3) is injection molded from PPS colloidal material, and the injection body (3) is integrally injection molded with multiple magnets (2).

5. The rotor according to claim 1, characterized in that, The upper end of the cup-shaped shaft (1) is radially contracted and connected to an upwardly extending journal section (101). The journal section (101) is used to connect the bearing. A positioning ring (4) is sleeved on the cup-shaped shaft (1) located below the injection body (3). The positioning ring (4) abuts against the lower end of the injection body (3). The positioning ring (4) is fixedly connected to the outer wall of the cup-shaped shaft (1) to limit the axial position of the injection body (3).

6. A brake motor, characterized in that, Includes the rotor described in any one of claims 1 to 4 above.

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