Rotor of servo motor

Abstract

The utility model relates to the technical field of motor rotors, in particular to a rotor of a servo motor, which comprises a rotating shaft, an iron core, a fixing assembly and at least twelve magnetic steel groups. The iron core and the rotating shaft are coaxially and fixedly arranged, at least six magnetic steel groups are uniformly arranged along the circumference of the iron core, and at least two magnetic steel groups are arranged along the axial direction of the rotating shaft; and the fixing assembly is connected with each magnetic steel group, and the fixing assembly is used for fixing each magnetic steel group on the iron core. According to the rotor of the servo motor, at least six magnetic steel groups are arranged on the same circumference, and at least two circumferences are arranged in the axial direction of the rotating shaft, so that the magnetic steel groups can be fixed on the outer ring of the iron core in a splicing manner, local magnetic steel can be conveniently maintained and replaced, and meanwhile, by means of the arrangement of the fixing assembly, the service life of the rotor is prolonged. The complexity of maintenance and replacement can be reduced, and the phenomenon that the magnetic steel falls off can be avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of motor rotors, and more specifically, to a rotor of a servo motor. Background Art

[0002] In modern society, servo motors are widely used in automated production lines, machine tools, new energy vehicles, robots and other technical fields. As the core component of the servo motor, the rotor assembly is usually composed of a shaft, a rotor core, a magnetic steel and other parts, among which the magnetic steel is usually connected to the rotor core by surface mounting. Since the motor rotor runs at high speed and switches between forward and reverse directions at high speed, the magnetic steel will be subjected to a large centrifugal force, which can easily cause the magnetic steel to fall off, resulting in motor failure.

[0003] The magnet is attached to the outer surface of the rotor core. It is difficult to position it during installation, which is labor-intensive and time-consuming, resulting in high manufacturing costs. For medium and high-speed motors, the magnet is subjected to great centrifugal force, which can easily cause the magnet to fly off the rotor, causing damage to the motor and making it impossible to guarantee the yield of the motor product.

[0004] In addition, as the working time of the rotor increases, oil, dust, carbon powder and other dirt will appear on the rotor. The rotor needs to be replaced in time, otherwise it will directly affect the use efficiency and life of the servo motor.

[0005] In view of this, it is necessary to provide a rotor of a servo motor to solve or alleviate the above technical defects. Utility Model Content

[0006] The main purpose of the utility model is to provide a rotor of a servo motor, aiming to solve the problem of magnetic steel falling off and troublesome replacement in the prior art.

[0007] In order to solve the above technical problems, a rotor of a servo motor is proposed, comprising: a rotating shaft, an iron core, a fixing assembly and at least twelve magnetic steel groups;

[0008] The iron core is coaxially fixed with the rotating shaft, the magnetic steel groups are evenly arranged in at least six pieces along the circumference of the iron core, and the magnetic steel groups are arranged in at least two circles along the axial direction of the rotating shaft;

[0009] The fixing components are respectively connected to each of the magnetic steel groups, and the fixing components are used to fix each of the magnetic steel groups to the iron core.

[0010] In any of the above technical solutions, further, the side of the magnetic steel group away from the rotating shaft is set to be a concave surface.

[0011] In any of the above technical solutions, further, the magnetic steel group is circumferentially spread over the outer surface of the iron core.

[0012] In any of the above technical solutions, further, the iron core is configured as a regular N-gon, the number of the magnetic steel groups on the same circumference is M, and N=M.

[0013] In any of the above technical solutions, further, the side surface of the magnetic steel group close to the rotating shaft is a plane.

[0014] In any of the above technical solutions, further, the fixing assembly includes two locking members and a plurality of fixing members;

[0015] The magnetic steel group is provided with a fixing hole, and the extending direction of the fixing hole is arranged parallel to the axial direction of the rotating shaft;

[0016] Each of the fixing members is inserted into a fixing hole of each of the magnetic steel groups, and the fixing member is used to connect the magnetic steel groups adjacent to each other in the axial direction of the rotating shaft;

[0017] The locking member is fixedly arranged on the iron core or the rotating shaft, and the two locking members are respectively located at two ends of the fixing member, and the two locking members are used to fix each fixing member.

[0018] In any of the above technical solutions, further, the same magnetic steel group is provided with at least two fixing holes.

[0019] In any of the above technical solutions, further, the iron core is provided with a plurality of hollow parts.

[0020] The beneficial effects are:

[0021] 1. The servo motor rotor of the utility model fixes the magnetic steel group by setting a fixing component, so that the magnetic steel group can be stably fixed on the iron core to avoid the phenomenon of the magnetic steel falling off.

[0022] 2. The magnetic steel groups of the servo motor rotor of the utility model are arranged in at least six on the same circumference, and at least two circumferences are arranged in the axial direction of the rotating shaft, so that the magnetic steel groups can be fixed on the outer ring of the iron core in a spliced ​​form. This arrangement facilitates the maintenance and replacement of local magnetic steels. At the same time, with the help of the setting of the fixed components, the complexity of maintenance and replacement can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1It is a three-dimensional structural schematic diagram of a rotor of a servo motor of the utility model;

[0025] Figure 2 It is a front view structural diagram of a rotor of a servo motor of the utility model;

[0026] Figure 3 It is a side view structural diagram of a rotor of a servo motor of the utility model;

[0027] Figure 4 The utility model is a schematic diagram of the cross-sectional structure of a rotor of a servo motor.

[0028] The following are the descriptions of the reference numerals:

[0029] 1. Rotating shaft;

[0030] 2. iron core; 201. hollow portion;

[0031] 3. Fixing assembly; 301. Locking member; 302. Fixing member;

[0032] 4. Magnetic steel group; 401, concave surface. DETAILED DESCRIPTION

[0033] Below, the example embodiments according to the present application will be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application, and it should be understood that the present application is not limited to the example embodiments described herein. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0034] It should be noted that, as shown in this application and claims, unless the context clearly indicates an exception, the words "a", "an", "a kind" and / or "the" do not specifically refer to the singular, but may also include the plural. Generally speaking, the terms "include" and "comprise" only indicate the inclusion of clearly identified steps and elements, and these steps and elements do not constitute an exclusive list, and the method or device may also include other steps or elements.

[0035] If the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0036] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0038] The utility model provides a rotor of a servo motor, which is mainly used to solve the problem in the prior art that the magnetic steel of the servo motor rotor is easy to fall off and is complicated to replace.

[0039] The rotor of a servo motor of the present application is described in detail through the following embodiments.

[0040] In this embodiment, if Figures 1 to 4 As shown, the rotor of the servo motor includes: a rotating shaft 1, an iron core 2, a fixing assembly 3 and at least twelve magnetic steel groups 4; the iron core 2 is coaxially fixedly arranged with the rotating shaft 1, and the magnetic steel groups 4 are evenly arranged to be at least six along the circumference of the iron core 2, and the magnetic steel groups 4 are arranged to be at least two circles along the axial direction of the rotating shaft 1; the fixing assembly 3 is respectively connected to each magnetic steel group 4, and the fixing assembly 3 is used to fix each magnetic steel group 4 to the iron core 2.

[0041] In the present technical solution, the magnetic steel group 4 is a whole piece of magnetic steel or a block structure formed by pressing a plurality of magnetic steel sheets. Specifically, the number of magnetic steel groups 4 is 80, 20 magnetic steel groups 4 are evenly arranged on the same circumference, and four circles are arranged along the axial direction of the rotating shaft 1, and the sides of any adjacent magnetic steel groups 4 are arranged in close contact.

[0042] The rotating shaft 1 and the iron core 2 are coaxially fixedly arranged, each magnetic steel group 4 is arranged on the outer surface of the iron core 2, and the fixing component 3 is connected to each magnetic steel group 4 and fixes each magnetic steel group 4 on the outer ring of the iron core 2.

[0043] In this embodiment, the side surface of the magnetic steel group 4 away from the rotating shaft 1 is configured as a concave surface 401 .

[0044] In the present technical solution, the concave surface 401 refers to the side surface that is concave 401 compared to the axis of the rotating shaft 1. Specifically, the outer side surface of the magnetic steel group 4 is set as an arc surface, and the center of the arc surface is located outside the entire rotor. In other technical solutions, the cross-section of the outer side surface of the magnetic steel group 4 is a broken line. The side surface of the magnetic steel group 4 away from the axis of the rotating shaft 1 is set as the concave surface 401, which is more convenient for the magnetic steel group 4 to rotate in the magnetic field inside the servo motor.

[0045] In this embodiment, the magnetic steel group 4 covers the entire outer surface of the iron core 2 on the circumference.

[0046] In the present technical solution, the magnetic steel group 4 covers the outer surface of the core 2 on the circumference, which means that the edges of the inner side surfaces of the magnetic steel groups 4 on the same circumference overlap with each other. Specifically, when laying the magnetic steel group 4, the magnetic steel group 4 not only covers the outer ring of the core 2 on the circumference, but also covers the outer ring of the core 2 in the axial direction.

[0047] In this embodiment, the iron core 2 is configured as a regular N-gon, the number of the magnetic steel groups 4 on the same circumference is M, and N=M.

[0048] In the present technical solution, the cross section of the core 2 is a regular icosagon, and the number of the magnetic steel groups 4 on the same circumference is twenty. In some other embodiments, the cross section of the core 2 is a regular dodecagon, and the number of the magnetic steel groups 4 on the same circumference is twelve.

[0049] Furthermore, the side surface of the magnetic steel group 4 close to the rotating shaft 1 is a plane.

[0050] In this embodiment, the fixing assembly 3 includes two locking members 301 and a plurality of fixing members 302; the magnetic steel group 4 is provided with a fixing hole, and the extension direction of the fixing hole is arranged parallel to the axial direction of the rotating shaft 1; each fixing member 302 is passed through the fixing hole of each magnetic steel group 4, and the fixing member 302 is used to connect the magnetic steel groups 4 adjacent in the axial direction of the rotating shaft 1; the locking member 301 is fixedly arranged on the iron core 2 or the rotating shaft 1, and the two locking members 301 are respectively located at both ends of the fixing member 302, and the two locking members 301 are used to fix each fixing member 302.

[0051] In the present technical solution, the fixing member 302 is a rod-shaped structure, and the number is an integer multiple of the number of magnetic steel groups 4 on the same circumference. The magnetic steel groups 4 in the same straight line in the axial direction are inserted into the same fixing member 302, which is specifically determined by the number of fixing holes on a single magnetic steel group 4. Specifically, there are two fixing holes on a single magnetic steel group 4, and the number of fixing members 302 is forty. Two fixing members 302 are inserted into two fixing holes of the magnetic steel group 4 in the same axial direction. The locking member 301 is a sheet-shaped structure, and the locking member 301 is provided with through holes of the same number as the fixing member 302. Both ends of the fixing member 302 extend to the outside of the four magnetic steel groups 4 in the same straight line in the axial direction. The two locking members 301 are respectively clamped on each fixing member 302 at both ends, and the locking members 301 are respectively fixed to the iron core 2 and each fixing member 302 by welding or riveting. Each magnetic steel group 4 is locked between the two locking members 301 to prevent the magnetic steel group 4 from loosening during the rotation of the rotor.

[0052] In this technical solution, the iron core 2 is provided with a plurality of hollow portions 201 .

[0053] The embodiments of the present disclosure have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or improvements to the technology in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. A rotor of a servo motor, characterized in that: include: A rotating shaft (1), an iron core (2), a fixing assembly (3) and at least twelve magnetic steel groups (4); The iron core (2) is coaxially fixedly arranged with the rotating shaft (1), the magnetic steel groups (4) are evenly arranged in at least six pieces along the circumference of the iron core (2), and the magnetic steel groups (4) are arranged in at least two circles along the axial direction of the rotating shaft (1); The fixing components (3) are respectively connected to each of the magnetic steel groups (4), and the fixing components (3) are used to fix each of the magnetic steel groups (4) to the iron core (2).

2. The rotor of the servo motor according to claim 1, characterized in that: The side surface of the magnetic steel group (4) away from the rotating shaft (1) is arranged as a concave surface (401).

3. The rotor of the servo motor according to claim 1, characterized in that: The magnetic steel group (4) is circumferentially spread over the outer surface of the iron core (2).

4. The rotor of the servo motor according to claim 3, characterized in that: The iron core (2) is arranged to be a regular N-gon, the number of the magnetic steel groups (4) on the same circumference is M, and N=M.

5. The rotor of the servo motor according to claim 4, characterized in that: The side surface of the magnetic steel group (4) close to the rotating shaft (1) is a plane.

6. The rotor of the servo motor according to claim 1, characterized in that: The fixing assembly (3) comprises two locking members (301) and a plurality of fixing members (302); The magnetic steel group (4) is provided with a fixing hole, and the extending direction of the fixing hole is arranged parallel to the axial direction of the rotating shaft (1); Each of the fixing members (302) is inserted into a fixing hole of each of the magnetic steel groups (4), and the fixing members (302) are used to connect the magnetic steel groups (4) adjacent to each other in the axial direction of the rotating shaft (1); The locking member (301) is fixedly arranged on the iron core (2) or the rotating shaft (1), and the two locking members (301) are respectively located at two ends of the fixing member (302), and the two locking members (301) are used to fix each fixing member (302).

7. The rotor of the servo motor according to claim 1, characterized in that: The iron core (2) is provided with a plurality of hollow portions (201).

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