36mm encoder stepping motor

Abstract

The utility model discloses a 36mm encoder stepping motor. The motor comprises an encoder support, an encoder chip, a rotating shaft, a magnet, a rear end cover and a rotor. The rotor comprises rotor cores and magnetic steel, the opposite surfaces of the two rotor cores are respectively provided with a first groove, the magnetic steel is embedded in the first grooves of the two rotor cores, and the two rotor cores and the magnetic steel are fixedly connected to form the rotor; a second groove is formed in a rear end cover of the motor and used for installing an encoder support, an encoder chip is installed in the center of the encoder support, and the concentricity of the encoder chip and a magnet on a rotating shaft is guaranteed. According to the utility model, the encoder is structurally designed on the premise that the thickness of the whole machine is not increased greatly and the torque of the motor is not changed, so that the requirements of quick response and high positioning precision required by a user are met.

Description

Technical Field

[0001] The utility model discloses a 36mm encoder stepper motor, belonging to the technical field of stepper motors. Background Technique

[0002] Stepper motors are usually used as actuators to precisely control the angular displacement or linear displacement of objects. They do not come with built-in encoders because encoders are mainly used in feedback systems to monitor information such as the position and speed of the motor in real time.

[0003] When an encoder is used in conjunction with a stepper motor, it can improve the control accuracy and dynamic performance of the system. By reading the output signal of the encoder, the control system can adjust the operating state of the stepper motor in real time to ensure that the motor moves precisely along a predetermined trajectory.

[0004] Generally speaking, most of the 36mm stepper motors sold on the market do not come with encoders. This is because stepper motors themselves have the characteristics of open-loop control, that is, they only need to rotate according to the predetermined number of steps and directions without the need to feedback position information in real time.

[0005] However, in some special application scenarios, such as those requiring high-precision control or real-time position feedback, users can customize stepper motors with encoders. For example, with the advent of the AI era, devices such as security and video conferencing with AI functions require motors to have fast response and high positioning accuracy requirements.

[0006] With the development of industrial automation and intelligent manufacturing, the requirements for the control accuracy and dynamic performance of stepper motors are getting higher and higher. Therefore, the market demand for stepper motors with encoders is also gradually increasing. Content of the Utility Model

[0007] In order to overcome and solve the above problems, the utility model discloses a 36mm encoder stepper motor. On the premise that the overall thickness of the machine increases little and the motor torque remains unchanged, the structure of the encoder is designed to meet the requirements of fast response and high positioning accuracy needed by users.

[0008] The technical solution of the utility model is as follows:

[0009] A 36mm encoder stepper motor, the motor includes an encoder bracket, an encoder chip, a rotating shaft, a magnet, a rear end cover and a rotor;

[0010] The rotor includes a rotor core and a magnetic steel. First grooves are respectively opened on the opposite surfaces of the two rotor cores, and the magnetic steel is embedded and installed in the first grooves of the two rotor cores. The two rotor cores, the magnetic steel and the rotating shaft are fixedly connected to form a rotor;

[0011] A second groove is formed on the rear end cover of the motor for installing an encoder bracket. An encoder chip is installed at the central position of the encoder bracket, ensuring the concentricity between the encoder chip and the magnet on the rotating shaft.

[0012] Preferably, the material of the above-mentioned rotor core is 45# steel and it is formed by hobbing.

[0013] Preferably, limit posts are provided on the above-mentioned rear end cover for facilitating the quick installation of the encoder bracket.

[0014] The beneficial effects of the present utility model are as follows:

[0015] 1. Function enhancement: On the premise that the thickness is only increased by 0.4 mm, the present utility model successfully installs an encoder, thereby adding functional components and improving the overall function and application range of the motor.

[0016] 2. Rotor structure optimization: The present utility model embeds the magnetic steel into the rotor core by forming a groove, making the rotor structure more compact, effectively reducing the overall thickness of the rotor by 1.4 mm compared with Embodiment 1, and achieving a thinner and lighter design.

[0017] 3. Material improvement: The rotor core of the present utility model is formed by hobbing with 45# steel. Compared with the silicon steel sheets laminated and riveted in Embodiment 1, it may have better mechanical properties and processing efficiency.

[0018] 4. Installation convenience: The present utility model is provided with limit posts on the rear end cover, which facilitates the quick installation of the encoder bracket and improves the production efficiency and assembly convenience. Description of the Drawings

[0019] Figure 1 is the structural diagram of a conventional 36 mm stepping motor;

[0020] Figure 2 is the cross-sectional view of the rotor of a conventional 36 mm stepping motor;

[0021] Figure 3 is the motor mechanism diagram of the present utility model;

[0022] Figure 4 is the cross-sectional view of the rotor of the present utility model;

[0023] Figure 5 Schematic diagram of the rear end cover of the motor. Detailed Embodiments

[0024] The present utility model will be further described below with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present utility model and cannot be used to limit the protection scope of the present utility model. Embodiment 1:

[0025] As Figure 1 shown, for a conventional 36 mm stepper motor, the rotor width is 14 mm and the overall thickness of the machine is 21.6 mm. As Figure 2 shown, the rotor adopts conventional technical means, with a magnet clamped between two rotor cores. The thickness of the magnet is 1.5 mm, the overall thickness of the rotor is 12 mm, the material of the rotor core is silicon steel sheet, the single thickness is 5.25 mm, and it is formed by stacking and riveting 0.35 mm single sheets (a total of 15 sheets). The axial length of the effective magnetic circuit of the rotor in Example 1 is 10.5 mm. Example 2:

[0026] As Figure 3 shown, a 36 mm encoder stepper motor, the motor includes an encoder bracket 1, an encoder chip 2, a rotating shaft 3, a magnet 4, a rear end cover 5 and a rotor 6;

[0027] As Figure 4 shown, the rotor 6 includes a rotor core 6-1 and a magnet 6-2. First grooves 6-3 are respectively formed on the opposite surfaces of the two rotor cores 6-1, and the magnet 6-2 is embedded and installed in the first grooves 6-3 of the two rotor cores 6-1. The two rotor cores 6-1, the magnet 6-3 and the rotating shaft 3 are fixedly connected to form the rotor 6;

[0028] A second groove 5-1 is formed on the rear end cover 5 of the motor for installing the encoder bracket 1. The encoder chip 2 is installed at the central position of the encoder bracket 1, ensuring the concentricity between the encoder chip 2 and the magnet 4 on the rotating shaft 3.

[0029] Preferably, the material of the above-mentioned rotor core 6-1 is 45# steel and is formed by hobbing.

[0030] As Figure 5 shown, preferably, a limit post 5-2 is provided on the rear end cover 5 for facilitating the quick installation of the encoder bracket 1.

[0031] The rotor width of the stepper motor in Example 2 is 12.6 mm and the overall thickness of the machine is 22 mm, which is 0.4 mm thicker than that in Example 1. However, the stepper motor in Example 2 is equipped with an encoder, and on the premise of a slightly increased thickness, functional components are added.

[0032] The rotor width of Example 2 is 10.6 mm, the magnet thickness is 1.5 mm, and the thickness of the rotor core is 5.25 mm. The axial length of the effective magnetic circuit of the rotor in Example 1 is 10.5 mm. The rotor in Example 2 can achieve the same technical effect as that in Example 1, but the thickness is reduced by 1.4 mm.

[0033] Enhanced functionality: The stepper motor of Example 2 successfully installed an encoder while only increasing the thickness by 0.4 mm, thereby adding functional components and enhancing the overall functionality and application scope of the motor.

[0034] Optimized rotor structure: In Example 2, the magnet is embedded in the rotor core by opening a groove, making the rotor structure more compact, effectively reducing the overall thickness of the rotor by 1.4 mm compared to Example 1, and achieving a thinner and lighter design.

[0035] Material improvement: The rotor core of Example 2 is formed by hobbing 45# steel, which may have better mechanical properties and processing efficiency compared to the silicon steel sheets used in Example 1 for laminated riveting.

[0036] Installation convenience: In Example 2, a limit post is provided on the rear end cover, which facilitates the quick installation of the encoder bracket, improving production efficiency and assembly convenience.

[0037] In summary, the stepper motor of Example 2 has achieved enhanced functionality, optimized structure, improved material, and enhanced installation convenience while maintaining or improving the technical effects.

[0038] The above are only the preferred embodiments of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the technical principles of the present utility model, several improvements and modifications can be made, and these improvements and modifications should also be regarded as the protection scope of the present utility model.

Claims

1. A 36mm encoder stepper motor, characterized in that, The motor includes an encoder bracket, an encoder chip, a rotating shaft, a magnet, a rear end cover, and a rotor; The rotor includes a rotor core and a permanent magnet. First grooves are respectively formed on the opposite surfaces of the two rotor cores. The permanent magnet is embedded and installed in the first grooves of the two rotor cores. The two rotor cores, the permanent magnet, and the rotating shaft are fixedly connected to form a rotor; A second groove is formed on the rear end cover of the motor for installing the encoder bracket. The encoder chip is installed at the central position of the encoder bracket, ensuring the concentricity between the encoder chip and the magnet on the rotating shaft.

2. A 36mm encoder stepper motor according to claim 1, characterized in that, The material of the rotor core is 45# steel and is formed by hobbing.

3. A 36mm encoder stepper motor according to claim 1, wherein Limit posts are arranged on the rear end cover for facilitating the quick installation of the encoder bracket.

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