CN217789415U

CN217789415U - Three-section type rotor structure

Info

Publication number: CN217789415U
Application number: CN202220212190.3U
Authority: CN
Inventors: 陈兴林; 徐进; 雷新海; 雷新江
Original assignee: Greatall Power Co ltd
Current assignee: Greatall Power Co ltd
Priority date: 2022-01-26
Filing date: 2022-01-26
Publication date: 2022-11-11
Anticipated expiration: 2032-01-26

Abstract

The utility model relates to a syllogic rotor structure, including first shaft segment, the second shaft segment, the permanent magnet, the sheath, first shaft segment, the close one end of second shaft segment all is provided with the semicircle cover, the transversal semicircle of personally submitting of semicircle cover is cyclic annular, first shaft segment, the terminal surface that is provided with the semicircle cover of second shaft segment is interior terminal surface, the inside airtight cavity that forms in the semicircle cover butt joint back of first shaft segment and second shaft segment, the permanent magnet is located airtight cavity, the inner wall of semicircle cover and the side permanent magnet side laminating of permanent magnet, the terminal surface is laminated with the terminal surface permanent magnet terminal surface of permanent magnet, the cross section of permanent magnet is circular, the cross sectional area that the axis mid point position department of permanent magnet corresponds is not equal to the area of permanent magnet terminal surface, the sheath cover is established in the outside of two semicircle covers. The three-section type rotor structure not only increases the thickness of the permanent magnet, but also can reduce the diameter of the rotor, reduces the linear speed of the rotor, solves the problem of demagnetization of the permanent magnet and solves the problem of overhigh linear speed of the rotor.

Description

Three-section type rotor structure

Technical Field

The utility model belongs to the technical field of the motor technique and specifically relates to a syllogic rotor structure is related to.

Background

The permanent magnet motor is a motor which adopts permanent magnet excitation and has no exciting current of a rotor, and compared with the traditional asynchronous motor, the permanent magnet motor has higher efficiency and higher power density.

Traditional surface-mounted permanent magnet motor permanent magnet is the tile form, pastes on motor shaft, and in order to guarantee that the motor permanent magnet does not receive temperature and electric current impact and lose magnetism when moving, the permanent magnet is all done thickly, and simultaneously in order to guarantee that motor speed is below critical speed, the rotor shaft is all done thickly, and very thick magnet steel in addition, whole rotor diameter is great, and the rotor linear velocity is very high. Therefore, the permanent magnet is ensured not to lose magnetism, and the linear velocity of the rotor is controlled to be too high, so that the permanent magnet and the rotor are difficult to meet the requirements at the same time.

Therefore, a three-segment rotor structure is needed to solve the above technical problems.

SUMMERY OF THE UTILITY MODEL

The utility model discloses to the technical problem who exists among the prior art, provide a syllogic rotor structure.

The utility model provides an above-mentioned technical problem's technical scheme as follows: the utility model provides a syllogic rotor structure, includes first axle section, second axle section, permanent magnet, sheath, the one end that is close of first axle section, second axle section all is provided with the semicircle cover, the transversal semicircle of personally submitting of semicircle cover is cyclic annular, the terminal surface that is provided with the semicircle cover of first axle section, second axle section is interior terminal surface, first axle section with the semicircle cover of second axle section docks the inside airtight cavity that forms in back, the permanent magnet is located in the airtight cavity, the inner wall of semicircle cover with the side permanent magnet side laminating of permanent magnet, interior terminal surface with the terminal surface permanent magnet terminal surface laminating of permanent magnet, the cross section of permanent magnet is circular, the cross sectional area that the axis midpoint position department of permanent magnet corresponds is unequal with the area of permanent magnet terminal surface, the sheath cover is established two the outside of semicircle cover.

Preferably, in the three-stage rotor structure, an outer side surface of the semicircular sleeve is convex, and an inner side surface of the sheath is concave.

Preferably, in the aforementioned three-stage rotor structure, the middle of the side surface of the permanent magnet is concave, and the inner side of the semicircular sleeve is convex.

Preferably, in the aforementioned three-stage rotor structure, the middle of the side surface of the permanent magnet is convex, and the inner side of the semicircular sleeve is concave.

Preferably, in the three-segment rotor structure, the inner end surface and the permanent magnet end surface are both toothed and meshed with each other, so that the contact area is increased.

Preferably, in the three-segment rotor structure, the sheath is in interference fit with the outer side faces of the two semicircular sleeves.

The utility model has the advantages that: the permanent magnet is fixed inside through the semicircular sleeves in the first shaft section and the second shaft section, the side face of the permanent magnet is designed into a convex or concave shape, the inner side face of each semicircular sleeve is matched with the corresponding semicircular sleeve, and the protective sleeve is in interference fit with the outer side faces of the two semicircular sleeves, so that greater acting force can be borne between three shaft ends (the first shaft end, the second shaft end and the permanent magnet) of the rotor in the axial direction, and axial disengagement can be effectively prevented. The three-section structure not only increases the thickness of the permanent magnet, but also can reduce the diameter of the rotor, reduce the linear velocity of the rotor, and realize the miniaturization and the light weight of the motor. The problem of demagnetization of the permanent magnet is solved, and the problem of overhigh linear speed of the rotor is solved.

Drawings

FIG. 1 is a schematic view of the internal connection structure of the present invention;

FIG. 2 is a perspective view of a first shaft segment;

FIG. 3 is a perspective view of a permanent magnet;

fig. 4 is a schematic view of an internal connection structure of a second embodiment of the present invention;

fig. 5 is a schematic view of an internal connection structure according to a third embodiment of the present invention.

In the drawings, the reference numbers indicate the following list of parts:

1. sheath, 2, second shaft section, 3, permanent magnet, 31, permanent magnet side, 32, permanent magnet terminal surface, 4, first shaft section, 5, interior terminal surface, 6, semicircle cover.

Detailed Description

The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention.

As shown in fig. 1, 2 and 3, a three-segment rotor structure includes a first shaft segment 4, a second shaft segment 2, a permanent magnet 3 and a sheath 1. The first shaft section 4 and the second shaft section 2 are provided with semicircular sleeves 6 at the close ends, and the cross sections of the semicircular sleeves 6 are semicircular.

For the sake of clarity of the connection, the inner end surfaces 5 of the first and

second shaft sections

4 and 2 are defined as end surfaces provided with the semicircular sleeves 6. After the semicircular sleeves 6 of the first shaft section 4 and the second shaft section 2 are butted, a closed cavity is formed inside the two semicircular sleeves 6, the permanent magnet 3 is positioned in the closed cavity, and the volume and the shape of the permanent magnet 3 are the same as those of the closed cavity. The inner wall of the semicircular sleeve 6 is tightly attached to the side surface of the permanent magnet 3, namely the permanent magnet side surface 31, and the inner end surface 5 is tightly attached to the end surface of the permanent magnet 3, namely the permanent magnet end surface 32. The inner end face 5 and the permanent magnet end face 32 can be plane or tooth-shaped, and are meshed with each other when being tooth-shaped, the contact area can be increased, the viscous liquid is used for bonding and fixing, the bonding force can be enhanced by increasing the contact area, and the connection is firmer.

The cross section of the permanent magnet 3 is circular, the sheath 1 is sleeved outside the two semicircular sleeves 6, and the sheath 1 is in interference fit with the outer side faces of the two semicircular sleeves 6.

As shown in fig. 1 and 4, when the sheath 1 is in a straight tube shape, the sheath 1 may be made of alloy steel, which is low in cost.

As shown in fig. 5, the outer side surface of the semicircular sleeve 6 is convex, the inner side surface of the sheath 1 is concave, and the sheath 1 is made of carbon fiber in this embodiment.

The corresponding cross-sectional area at the middle point of the central axis of the permanent magnet 3 is not equal to the area of the permanent magnet end surface 32. Specifically, there are two embodiments, the first one is that as shown in fig. 1 and 5, the middle part of the permanent magnet side surface 31 is concave, and the inner side of the semicircular sleeve 6 is convex. Secondly, as shown in fig. 4, the middle of the permanent magnet side surface 31 is convex, and the inner side of the semicircular sleeve 6 is concave.

The axial connection of the three-section shaft is tighter, and the axial disengagement can be effectively prevented. The structure not only increases the thickness of the permanent magnet 3, but also reduces the diameter of the rotor, reduces the linear speed of the rotor, and the motor can be miniaturized and lightened. The problem of demagnetization of the permanent magnet 3 is solved, and the problem of overhigh linear speed of the rotor is solved.

In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, only for convenience of description and simplification of description, but not for indicating or implying that the referred device or element must have a specific orientation and a specific orientation configuration and operation, and thus, should not be construed as limiting the present invention. Furthermore, "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate a number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be directly connected or indirectly connected through an intermediate member, or they may be connected through two or more elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

While one embodiment of the present invention has been described in detail, the description is only a preferred embodiment of the present invention, and should not be considered as limiting the scope of the present invention. All the equivalent changes and improvements made according to the application scope of the present invention should still fall within the patent coverage of the present invention.

Claims

1. A three-section rotor structure is characterized in that: including first shaft segment (4), second shaft segment (2), permanent magnet (3), sheath (1), the close one end of first shaft segment (4), second shaft segment (2) all is provided with semicircle cover (6), the transversal semicircle of personally submitting semicircle cover (6) is cyclic annular, the terminal surface that is provided with semicircle cover (6) of first shaft segment (4), second shaft segment (2) is interior terminal surface (5), first shaft segment (4) with the semicircle cover (6) butt joint back inside airtight cavity that forms of second shaft segment (2), permanent magnet (3) are located in the airtight cavity, the inner wall of semicircle cover (6) with the side permanent magnet side (31) laminating of permanent magnet (3), interior terminal surface (5) with the terminal surface permanent magnet terminal surface (32) laminating of permanent magnet (3), the cross section of permanent magnet (3) is circular, the cross sectional area that the axis midpoint position department of permanent magnet (3) corresponds and the area of permanent magnet terminal surface (32), sheath (1) two the outside inequality cover of semicircle cover (6) is established.

2. The three-stage rotor structure according to claim 1, wherein: the outer side surface of the semicircular sleeve (6) is convex, and the inner side surface of the sheath (1) is concave.

3. The three-stage rotor structure according to claim 1, wherein: the middle part of the permanent magnet side surface (31) is concave, and the inner side of the semicircular sleeve (6) is convex.

4. The three-stage rotor structure of claim 1, wherein: the middle part of the permanent magnet side surface (31) is in an outward convex shape, and the inner side of the semicircular sleeve (6) is in an inward concave shape.

5. The three-stage rotor structure of claim 1, wherein: the inner end face (5) and the permanent magnet end face (32) are both in a tooth shape and are meshed with each other, so that the contact area is increased.

6. The three-stage rotor structure according to claim 1, wherein: the sheath (1) is in interference fit with the outer side faces of the two semicircular sleeves (6).