Rotor structure of servo motor

Abstract

The utility model relates to the technical field of servo motors, and discloses a rotor structure of a servo motor, which comprises a rotor main body, a through groove is arranged at the center inside the rotor main body in a penetrating manner, the outer end of the rotor main body is provided with a permanent magnet assembly with strong fixing force, and the permanent magnet assembly comprises a T-shaped permanent magnet N pole and a T-shaped permanent magnet S pole. The rotor structure of the servo motor is provided with the T-shaped permanent magnet N poles, the T-shaped permanent magnet S poles, the connecting frames, the built-in grooves, the limiting plates and the fixing ferrules, so that independent placement spaces are generated, the T-shaped permanent magnet N poles and the T-shaped permanent magnet S poles can be fixed in the built-in grooves in a staggered manner and can uniformly cover the surface of the rotor main body, the magnetic field effect is improved, and the service life of the rotor main body is prolonged. The problems that multiple groups of magnets are fixed on the surface of a rotor and cannot be uniformly wrapped, the coverage area of the magnets is limited, the magnetic field is easy to be unstable, the connection force between the magnets is limited, the fixing force is not strong, and the magnetic force effect is influenced are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of servo motors, and specifically relates to a rotor structure of a servo motor. Background Technique

[0002] A servo motor is an engine that controls the operation of mechanical components in a servo system. It is an auxiliary motor indirect speed change device. The working principle of a servo motor is based on its three core modules: a driver, an encoder, and the motor itself. The driver receives external control signals and controls the servo motor in three ways: position, speed, and torque to achieve high-precision positioning of the transmission system. The encoder, as a speed feedback and position feedback component, accurately measures the rotational speed of the motor and the distance moved by the workbench, and feeds this information back to the driver to form a closed-loop control system.

[0003] The servo motor itself mainly consists of a stator and a rotor. The stator generates a rotating magnetic field, and the rotor rotates synchronously under the action of the magnetic field to achieve the rotation of the motor. Currently, the adopted rotor fixes multiple groups of magnets on the surface of the rotor, which cannot be evenly wrapped, the magnet coverage area is limited, and the magnetic field instability is likely to occur. At the same time, the connection force between the magnets is limited, and the fixing force is not strong, which affects the magnetic force effect.

[0004] Therefore, a new rotor structure of a servo motor is proposed to solve the above problems. Content of the Utility Model

[0005] The purpose of the utility model is to provide a rotor structure of a servo motor to solve the problems raised in the above background technique, that is, multiple groups of magnets are fixed on the surface of the rotor, which cannot be evenly wrapped, the magnet coverage area is limited, and the magnetic field instability is likely to occur. At the same time, the connection force between the magnets is limited, and the fixing force is not strong, which affects the magnetic force effect.

[0006] To achieve the above purpose, the utility model provides the following technical solution: A rotor structure of a servo motor, including a rotor main body, a through groove is penetrated through the center of the rotor main body, and a permanent magnet assembly with strong fixing force is arranged at the outer end of the rotor main body;

[0007] The permanent magnet assembly includes a T-shaped permanent magnet N pole and a T-shaped permanent magnet S pole. A fixing collar is fixedly connected to the outer end of the rotor main body. A plurality of groups of limiting plates are fixedly connected to the outer end of the fixing collar at equal intervals in the circumferential direction. An internal groove is formed between two groups of limiting plates. A plurality of groups of T-shaped permanent magnet N poles and T-shaped permanent magnet S poles are arranged and are fixedly connected to each other in a staggered manner inside the internal groove;

[0008] Preferably, the heights of the T-shaped permanent magnet N pole and the T-shaped permanent magnet S pole are greater than the height of the limiting plate, and a plurality of groups of connecting frames are fixedly connected between the T-shaped permanent magnet N pole and the T-shaped permanent magnet S pole.

[0009] Preferably, a protective inner layer is attached to the inner wall of the through groove, and two groups of insertion plates are fixedly connected to the front end and the rear end of the rotor body respectively, and the two groups of insertion plates are located on both sides of the through groove respectively.

[0010] Preferably, outer baffles are fixedly connected to both sides of the front end and the rear end of the protective inner layer, an installation groove is formed inside the outer baffle, and the insertion plate is inserted and connected inside the installation groove.

[0011] Preferably, a second positioning frame is fixedly connected between the tops of the outer baffles, and a first positioning frame is fixedly connected between the bottoms of the outer baffles.

[0012] Preferably, a support inner ring is fixedly connected to the outer wall of the through groove, and a support outer ring is fixedly connected to the outer wall inside the rotor body.

[0013] Preferably, a plurality of support frames are fixedly connected to the outer end of the support inner ring, and a plurality of fixing seats are fixedly connected to the inner wall of the support outer ring.

[0014] Preferably, the support frames and the fixing seats are in one-to-one correspondence, the outer ends of the support frames are inserted into the fixing seats and are inserted and connected inside the fixing seats.

[0015] Compared with the prior art, the beneficial effects of the present utility model are as follows: the rotor structure of this servo motor not only realizes the strong fixing function, the protection function, but also realizes the support function;

[0016] (1) By providing the T-shaped permanent magnet N pole, the T-shaped permanent magnet S pole, the connecting frame, the built-in groove, the limiting plate and the fixing collar, the outer end of the rotor body is strengthened by the fixing collar to ensure the fixing property of the surface of the rotor body. A plurality of limiting plates are fixedly installed on the surface of the rotor body at equal intervals in a ring shape. An inner groove is formed between the two limiting plates to generate an independent placement space. The T-shaped permanent magnet N pole and the T-shaped permanent magnet S pole can be fixedly staggered in the built-in groove, and can be evenly covered on the surface of the rotor body to improve the magnetic field effect, and at the same time, the T-shaped permanent magnet N pole and the T-shaped permanent magnet S pole will not be blocked. The connecting frame enhances the connection force between the T-shaped permanent magnet N pole and the T-shaped permanent magnet S pole, effectively preventing the T-shaped permanent magnet N pole and the T-shaped permanent magnet S pole from falling off;

[0017] (2) By providing a through groove, a protective inner layer, an outer baffle, a first positioning frame, a second positioning frame, an insertion plate and a mounting groove, the protective inner layer is fitted and placed on the inner wall of the through groove to ensure that the inner wall of the through groove will not be worn during the use of the rotating shaft, providing comprehensive protection for the inner wall of the through groove. The outer baffle can play a role in limiting and protecting both ends of the protective inner layer. The insertion plate is fixed inside the mounting groove by using an insertion structure to quickly fix the protective inner layer, effectively preventing the displacement of the protective inner layer and reducing the protection effect, and strengthening the firmness between the protective inner layer and the through groove. The first positioning frame and the second positioning frame cooperate with each other to enhance the stability of both ends of the outer baffle;

[0018] (3) By providing a support frame, a fixed seat, a support inner ring and a support outer ring, the support inner ring and the support outer ring cooperate with each other to provide strong support and protection for both the inside and outside of the rotor body, ensuring that the rotor body will not be sunken after long-term rotation, affecting the use effect, and at the same time enhancing the firmness of the inside and outside of the rotor body. The outer wall of the rotor body is reinforced by multiple support frames. Brief Description of the Drawings

[0019] Figure 1 is a front sectional structure schematic diagram of the present utility model;

[0020] Figure 2 is a side view structure schematic diagram of the protective inner layer of the present utility model;

[0021] Figure 3 is a front view structure schematic diagram of the through groove of the present utility model;

[0022] Figure 4 is a front sectional structure schematic diagram of the support inner ring of the present utility model.

[0023] In the figure: 1, rotor body; 2, T-shaped permanent magnet N pole; 3, limit plate; 4, connecting frame; 5, fixed collar; 6, built-in groove; 7, outer baffle; 8, first positioning frame; 9, through groove; 10, protective inner layer; 11, insertion plate; 12, second positioning frame; 13, mounting groove; 14, T-shaped permanent magnet S pole; 15, support outer ring; 16, fixed seat; 17, support frame; 18, support inner ring. Detailed Embodiment

[0024] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0025] Embodiment 1: Please refer to Figures 1-4, a rotor structure of a servo motor, including a rotor body 1, a through groove 9 is provided through the center inside the rotor body 1, and a permanent magnet assembly with strong fixing force is provided at the outer end of the rotor body 1;

[0026] The permanent magnet assembly includes a T-shaped permanent magnet N pole 2 and a T-shaped permanent magnet S pole 14. A fixed collar 5 is fixedly connected to the outer end of the rotor body 1. A plurality of groups of limiting plates 3 are fixedly connected to the outer end of the fixed collar 5 at equal intervals in a ring shape. An internal groove 6 is formed between two groups of limiting plates 3. A plurality of groups of T-shaped permanent magnet N poles 2 and T-shaped permanent magnet S poles 14 are provided, and they are fixedly connected in the internal groove 6 in an alternating manner;

[0027] The heights of the T-shaped permanent magnet N pole 2 and the T-shaped permanent magnet S pole 14 are greater than the height of the limiting plate 3. A plurality of groups of connecting frames 4 are fixedly connected between the T-shaped permanent magnet N pole 2 and the T-shaped permanent magnet S pole 14;

[0028] Specifically, as Figure 1 and Figure 2 shown, when in use, the outer end of the rotor body 1 enhances the supporting force through the fixed collar 5 to ensure the fixity of the surface of the rotor body 1. A plurality of groups of limiting plates 3 are fixedly installed on the surface of the rotor body 1 at equal intervals in a ring shape. An internal groove 6 is formed between two groups of limiting plates 3 to generate an independent placement space. The T-shaped permanent magnet N pole 2 and the T-shaped permanent magnet S pole 14 can be fixedly connected in the internal groove 6 in an alternating manner, which can evenly cover the surface of the rotor body 1 to improve the magnetic field effect, and at the same time will not cause occlusion to the T-shaped permanent magnet N pole 2 and the T-shaped permanent magnet S pole 14. The connecting frame 4 enhances the connection force between the T-shaped permanent magnet N pole 2 and the T-shaped permanent magnet S pole 14, effectively preventing the T-shaped permanent magnet N pole 2 and the T-shaped permanent magnet S pole 14 from falling off.

[0029] Embodiment 2: A protective inner layer 10 is attached to the inner wall of the through groove 9. Two groups of insertion plates 11 are fixedly connected to the front end and the rear end of the rotor body 1 respectively, and the two groups of insertion plates 11 are located on both sides of the through groove 9 respectively;

[0030] On both sides of the front end and the rear end of the protective inner layer 10, outer baffles 7 are fixedly connected. An installation groove 13 is formed inside the outer baffles 7, and the insertion plates 11 are inserted and connected inside the installation groove 13;

[0031] A second positioning frame 12 is fixedly connected between the tops of the outer baffles 7, and a first positioning frame 8 is fixedly connected between the bottoms of the outer baffles 7;

[0032] Specifically, as Figure 1 and Figure 3As shown, when in use, the protective inner layer 10 is placed in close contact with the inner wall of the through groove 9 to ensure that the inner wall of the through groove 9 will not be worn during the use of the rotating shaft, and the inner wall of the through groove 9 is provided with all-round protection. The outer baffle plate 7 can play a role of limiting protection for both ends of the protective inner layer 10. The plug-in structure is used to fix the plug-in plate 11 inside the installation groove 13 to quickly fix the protective inner layer 10, effectively preventing the protective inner layer 10 from being displaced and reducing the protection effect, and strengthening the firmness between the protective inner layer 10 and the through groove 9. The first positioning frame 8 and the second positioning frame 12 cooperate with each other to enhance the stability of the two ends of the outer baffle plate 7.

[0033] Embodiment 3: The outer wall of the through groove 9 is fixedly connected with the support inner ring 18, and the outer wall inside the rotor body 1 is fixedly connected with the support outer ring 15;

[0034] The outer end of the supporting inner ring 18 is fixedly connected with a plurality of supporting frames 17, and the inner wall of the supporting outer ring 15 is fixedly connected with a plurality of fixing seats 16;

[0035] The support frame 17 corresponds to the fixing seat 16 one by one, and the outer end of the support frame 17 is inserted into the fixing seat 16 and plugged into the inside of the fixing seat 16;

[0036] Specifically, Figure 1 and Figure 4 As shown, when in use, the supporting inner ring 18 and the supporting outer ring 15 cooperate with each other to provide strong support and protection for both the inside and outside of the rotor body 1, ensuring that the rotor body 1 will not be dented after long-term rotation and affecting the use effect, while enhancing the firmness of the inside and outside of the rotor body 1, and reinforcing the outer wall of the rotor body 1 through multiple sets of support frames 17.

[0037] Working principle: When the utility model is in use, the outer end of the rotor body 1 is strengthened with supporting force by the fixing ring 5 to ensure the fixity of the surface of the rotor body 1. A plurality of groups of limiting plates 3 are fixedly installed at equal intervals in an annular manner on the surface of the rotor body 1. A built-in groove 6 is formed between two groups of limiting plates 3 to generate an independent placement space. The N pole 2 of the T-type permanent magnet and the S pole 14 of the T-type permanent magnet can be staggered and fixed in the built-in groove 6 to evenly cover the surface of the rotor body 1, thereby enhancing the magnetic field effect. At the same time, the N pole 2 of the T-type permanent magnet and the S pole 14 of the T-type permanent magnet are not blocked. By connecting The frame 4 enhances the connection force between the T-shaped permanent magnet N pole 2 and the T-shaped permanent magnet S pole 14. The protective inner layer 10 is placed in close contact with the inner wall of the through slot 9 to ensure that the inner wall of the through slot 9 will not be worn during the use of the rotating shaft, and provides all-round protection for the inner wall of the through slot 9. The outer baffle plate 7 can be used to limit the two ends of the protective inner layer 10. The plug-in structure is used to fix the plug-in plate 11 inside the installation slot 13 to quickly fix the protective inner layer 10, effectively preventing the protective inner layer 10 from being displaced and reducing the protective effect, and enhancing the firmness between the protective inner layer 10 and the through slot 9.

[0038] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above-mentioned 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 and non-restrictive. The scope of the present utility model is defined by the appended 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.

Claims

1. A servo motor rotor structure, comprising a rotor body (1), characterized in that: A through slot (9) is provided at the center of the rotor body (1), and a permanent magnet assembly with strong fixing force is provided at the outer end of the rotor body (1); The permanent magnet assembly comprises a T-shaped permanent magnet N pole (2) and a T-shaped permanent magnet S pole (14); the outer end of the rotor body (1) is fixedly connected to a fixed collar (5); the outer end of the fixed collar (5) is annularly and evenly spacedly fixedly connected to a plurality of groups of limit plates (3); a built-in groove (6) is formed between two groups of the limit plates (3); and a plurality of groups of T-shaped permanent magnet N poles (2) and T-shaped permanent magnet S poles (14) are arranged and fixedly connected in an alternating manner inside the built-in grooves (6).

2. The rotor structure of a servo motor according to claim 1, characterized in that: The height of the T-shaped permanent magnet N pole (2) and the T-shaped permanent magnet S pole (14) is greater than the height of the limiting plate (3), and a plurality of groups of connecting frames (4) are fixedly connected between the T-shaped permanent magnet N pole (2) and the T-shaped permanent magnet S pole (14).

3. The rotor structure of a servo motor according to claim 1, characterized in that: The inner wall of the through slot (9) is fitted with a protective inner layer (10), and the front and rear ends of the rotor body (1) are fixedly connected with two groups of plug plates (11), and the two groups of plug plates (11) are respectively located on both sides of the through slot (9).

4. The rotor structure of a servo motor according to claim 3, characterized in that: Both sides of the front and rear ends of the protective inner layer (10) are fixedly connected to outer baffles (7), a mounting groove (13) is provided inside the outer baffle (7), and the plug-in plate (11) is plugged and connected inside the mounting groove (13).

5. The rotor structure of a servo motor according to claim 4, characterized in that: A second positioning frame (12) is fixedly connected between the tops of the outer baffles (7), and a first positioning frame (8) is fixedly connected between the bottoms of the outer baffles (7).

6. The rotor structure of a servo motor according to claim 1, characterized in that: The outer wall of the through groove (9) is fixedly connected to a supporting inner ring (18), and the outer wall inside the rotor body (1) is fixedly connected to a supporting outer ring (15).

7. The rotor structure of a servo motor according to claim 6, characterized in that: The outer end of the supporting inner ring (18) is fixedly connected to a plurality of supporting frames (17), and the inner wall of the supporting outer ring (15) is fixedly connected to a plurality of fixing seats (16).

8. The rotor structure of a servo motor according to claim 7, characterized in that: The support frame (17) corresponds to the fixing seat (16) one by one, and the outer end of the support frame (17) is inserted into the fixing seat (16) and plugged into the inside of the fixing seat (16).

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