CN218888234U - Motor rotor - Google Patents

Abstract

The utility model discloses an electric motor rotor, electric motor rotor includes: iron core, a plurality of magnet, cylindrical staple bolt, first locating part and second locating part. A plurality of clamping blocks are arranged on the inner wall of the cylindrical hoop at intervals along the circumferential direction; the outer peripheral surface of the iron core is provided with a plurality of clamping grooves which are in one-to-one correspondence with the clamping blocks along the circumferential direction, each clamping block is clamped with each clamping groove, so that two adjacent clamping blocks, the outer peripheral surface of the iron core and the inner wall of the cylindrical hoop form a magnet accommodating part, and each magnet is accommodated in the magnet accommodating part; the first limiting part and the second limiting part are located on two opposite sides of the cylindrical hoop in the first direction, the first limiting part and the second limiting part circumferentially surround the first direction, and the first limiting part and the second limiting part respectively cover two opposite sides of the magnet containing parts so as to limit movement of the magnets in each magnet containing part in the first direction. The utility model discloses can wrap up magnet when realizing that magnet and iron core combine, effectively protect magnet not receive external environment's corruption and damage.

Description

Motor rotor

Technical Field

The utility model relates to the technical field of electric machines, in particular to electric motor rotor.

Background

With the continuous improvement of the performance of permanent magnet materials and the development of motor technology, motors are widely applied in various fields in national economy, a rotor and a stator are two major components of the motor, in the fixing method of the motor rotor magnet, the traditional combination mode of an iron core and a magnet of a surface-mounted motor rotor is a glue bonding mode or a plastic magnet ring structure, but the magnet is exposed in the external environment no matter the glue bonding mode or the plastic magnet ring structure is, the magnet is easy to damage and can be corroded in an acid-base environment, and the plastic component in the plastic magnet ring structure can reduce the magnetic performance and can not meet the working condition requirement of the motor.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve prior art down, electric motor rotor combines iron core and magnet through the mode of glue and plastics magnetic ring, can make magnet expose in external environment, and magnet easily damages and easily takes place to corrode in the acid-base environment. The utility model provides an electric motor rotor can be when realizing that magnet and iron core combine, wraps up magnet, effectively protects magnet not corroded and damage.

In order to solve the technical problem, an embodiment of the present invention discloses an electric motor rotor, the electric motor rotor includes: the iron core, the magnets, the cylindrical hoop, the first limiting piece and the second limiting piece; a plurality of clamping blocks are arranged on the inner wall of the cylindrical hoop at intervals along the circumferential direction; a plurality of clamping grooves which correspond to the clamping blocks one to one are formed in the peripheral surface of the iron core along the circumferential direction, each clamping block is clamped with each clamping groove, so that two adjacent clamping blocks, the peripheral surface of the iron core and the inner wall of the cylindrical hoop form a magnet accommodating part, and each magnet is accommodated in the magnet accommodating part; the first limiting part and the second limiting part are located on two opposite sides of the first direction of the cylindrical hoop, the first direction is circumferentially surrounded by the first limiting part, and the two opposite sides of the magnet containing part are respectively covered by the first limiting part and the second limiting part so as to limit the movement of the magnets in the magnet containing part in the first direction.

Adopt above-mentioned technical scheme, can assemble the iron core earlier into cylindrical staple bolt, a plurality of draw-in grooves of iron core and a plurality of fixture block looks joints of the one-to-one on the cylindrical staple bolt inner wall, at this moment, two adjacent fixture blocks, the outer peripheral face of iron core and the inner wall of cylindrical staple bolt have formed magnet containing portion, hold each magnet in its magnet containing portion that corresponds again, magnet in ascending motion in week has been restricted, the last mode of rethread moulding plastics covers first locating part and second locating part in the opposite both sides of the first direction of cylindrical staple bolt, constitute and wrap up the structure entirely, make magnet by all-round parcel, further restricted the motion of magnet in the first direction, when realizing that magnet and iron core combine, effectively protect magnet not receive external environment's corruption and damage.

According to the present invention, the first locating part covers a terminal surface of the iron core in the first direction, a terminal surface of the cylindrical hoop in the first direction and all of the fixture blocks in the first direction.

According to the utility model discloses a another concrete embodiment, the second locating part covers the iron core another terminal surface of first direction, another terminal surface of cylindrical staple bolt first direction and all another terminal surface of fixture block first direction.

According to another embodiment of the present invention, the first locating part is formed by injection molding.

According to another embodiment of the present invention, the second locating part is formed by plastic injection molding.

According to another embodiment of the present invention, the first position-limiting member is annular.

According to another embodiment of the present invention, the second position-limiting member is annular.

According to another embodiment of the present invention, the first position-limiting member does not completely cover an end surface of the iron core in the first direction, and the portion of the iron core in the shape of a ring is exposed.

According to another specific embodiment of the present invention, the second position-limiting member does not completely cover the other end surface of the iron core in the first direction, and the portion in the shape of a ring is exposed from the iron core.

According to the utility model discloses a further embodiment, magnet with the iron core is in the magnet accommodation portion is laminated and is connected.

Drawings

FIG. 1 shows a prior art magnet bonded to a core by glue;

FIG. 2 shows a schematic diagram of a prior art magnet and iron core combined by a plastic magnet ring structure;

fig. 3 shows a schematic perspective view of the cylindrical hoop of the present invention;

fig. 4 is a schematic view showing the iron core and the magnets of the present invention fitted into the cylindrical hoop;

fig. 5 is a schematic view illustrating the cylindrical hoop wrapped by the first limiting member and the second limiting member according to the present invention;

fig. 6 shows a cross-sectional view of fig. 5.

Reference numerals are as follows: 1. a cylindrical hoop; 101. a first limit piece; 102. a second limiting member; 103. a magnet housing part; 104. a clamping block; 2. an iron core; 203. a card slot; 202. an iron core; 201. an iron core 3, a magnet; 301. a magnetic ring; 302. a magnet; 4. a motor rotor; 5. and a rotating shaft hole.

Detailed Description

The following description is provided for illustrative embodiments of the present invention, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein. While the invention will be described in conjunction with the preferred embodiments, it is not intended that features of the invention be limited to only those embodiments. On the contrary, the intention of implementing the novel features described in connection with the embodiments is to cover other alternatives or modifications which may be extended based on the claims of the present invention. In the following description, numerous specific details are included to provide a thorough understanding of the invention. The invention may be practiced without these particulars. Furthermore, some of the specific details are omitted from the description so as not to obscure or obscure the present invention. It should be noted that, in the case of no conflict, the embodiments and features of the embodiments of the present invention may be combined with each other.

It should be noted that in this specification, like reference numerals and letters refer to like items in the following drawings, and thus, once an item is defined in one drawing, it need not be further defined and explained in subsequent drawings.

In the description of the present embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the present invention are usually placed in when used, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or the element to which the present invention is directed must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.

The terms "first," "second," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

In the description of the present embodiment, it should be further noted that, unless explicitly stated or limited otherwise, the terms "disposed," "connected," and "connected" are to be interpreted broadly, e.g., as a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. Specific meanings of the above terms in the present embodiment can be understood as specific cases by those of ordinary skill in the art.

To make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Fig. 1 shows a possible embodiment in which a conventional surface-mounted rotor magnet 302 is bonded to the core 202 by glue, and in this way, glue may be applied to the outer circumferential surface of the core 202 or the surface where the magnet 302 is bonded to the core 202, so as to bond the magnet 302 to the outer circumferential surface of the core 202 by glue, in such a way that the magnet 302 is exposed to the external environment and is susceptible to damage and corrosion due to acid-base environment.

Fig. 2 shows a possible embodiment, in which a conventional surface-mounted rotor magnet is combined with an iron core 201 in a plastic magnetic ring structure, that is, a magnetic ring 301 is formed by injection molding of a magnetic material and is sleeved on an outer circumferential surface of the iron core 201, on one hand, the magnetic ring 301 contains a plastic component, so that magnetic performance is low and cannot meet working condition requirements of a motor, and on the other hand, the magnetic ring 301 is exposed in an external environment and is easily damaged and corroded by an acid-base environment.

With reference to fig. 3 to 5, the present application provides an electric machine rotor 4 of another structure, comprising: the iron core 2, a plurality of magnets 3, cylindrical staple bolt 1, first locating part 101 and second locating part 102. A plurality of fixture blocks 104 are arranged on the inner wall of the cylindrical hoop 1 at intervals along the circumferential direction (shown in the direction R in fig. 3), for example, 8, 10, or 12 fixture blocks 104 may be provided, and 12 are used as an example in the present embodiment for description; the outer peripheral surface of the iron core 2 is provided with a plurality of clamping grooves 203 corresponding to the plurality of clamping blocks 104 one by one along the circumferential direction, each clamping block 104 is clamped with each clamping groove 203, so that two adjacent clamping blocks 104, the outer peripheral surface of the iron core 2 and the inner wall of the cylindrical hoop 1 form a magnet accommodating part 103, each magnet 3 is accommodated in the magnet accommodating part 103, and exemplarily, the number of the magnet accommodating parts 103 corresponds to the number of the clamping blocks 104 and the clamping grooves 203.

Referring to fig. 5 and 6, the first limiting member 101 and the second limiting member 102 are located on two opposite sides of the cylindrical hoop 1 in the first direction (shown as the Z direction in fig. 5), circumferentially surround the first direction, and the first limiting member 101 and the second limiting member 102 respectively cover two opposite sides of the magnet accommodating portion 103 to limit the movement of the magnet 3 in each magnet accommodating portion 103 in the first direction. That is, the first stopper 101, the second stopper 102 and the cylindrical hoop 1 surround the magnet 3 in all directions, and the magnet 3 is restricted from moving relative to the magnet accommodating portion 103. Illustratively, the first limiting member 101 and the second limiting member 102 are the same in shape and size.

By adopting the above technical scheme, referring to fig. 4 and 5, the iron core 2 can be assembled into the cylindrical hoop 1 first, the plurality of clamping grooves 203 of the iron core 2 are clamped with the plurality of clamping blocks 104 corresponding to one another on the inner wall of the cylindrical hoop 1, at this time, two adjacent clamping blocks 104, the outer peripheral surface of the iron core 2 and the inner wall of the cylindrical hoop 1 form the magnet accommodating portion 103, each magnet 3 is accommodated in the corresponding magnet accommodating portion 103, and finally the first limiting member 101 and the second limiting member 102 are covered on two opposite sides of the cylindrical hoop 1 in the first direction (shown in the Z direction in fig. 5) in an injection molding manner to form a full-wrapping structure, so that the magnet 3 is wrapped in an omnibearing manner, the combination of the magnet 3 and the iron core 2 is realized, and the magnet 3 is effectively protected from being corroded and damaged by the external environment.

In some possible embodiments, referring to fig. 4 to 6, the first stopper 101 covers an end surface of the core 2 in the first direction (indicated by the Z direction in fig. 4), an end surface of the cylindrical hoop 1 in the first direction, and an end surface of all the latch blocks 104 in the first direction. That is, one end face of the cylindrical anchor ear 1 is wrapped by the first limiting member 101, and along the first direction, the end face of the iron core 2 and the end faces of all the fixture blocks 104 are wrapped inside and attached to the inner surface of the first limiting member 101, so that the movement of the iron core 2 in the first direction is further limited.

In some possible embodiments, referring to fig. 4 to 6, the second stopper 102 covers the other end surface of the core 2 in the first direction (indicated by the Z direction in fig. 6), the other end surface of the cylindrical hoop 1 in the first direction, and the other end surfaces of all the latch blocks 104 in the first direction. That is, one end face of the cylindrical hoop 1 is wrapped by the second limiting member 102, and along the first direction, the end face of the iron core 2 and the end faces of all the fixture blocks 104 are wrapped inside and attached to the inner surface of the second limiting member 102, so that the movement of the iron core 2 in the first direction is further limited.

In some possible embodiments, referring to fig. 5, the first retaining member 101 is injection molded by plastic. For example, the first limiting member 101 is made of plastic, and when the first limiting member 101 is fixed to an end surface of the cylindrical hoop 1 by injection molding, the first limiting member 101 is integrated with an end surface of the iron core 2 and an outer peripheral surface of the cylindrical hoop 1 to limit movement of the magnet and the iron core 2 in a first direction (shown as Z direction in fig. 5).

In some possible embodiments, referring to fig. 5 and 6, the second retaining member 102 is formed by plastic injection molding. For example, the second limiting member 102 is made of plastic, and when the second limiting member 102 is fixed to the other end surface of the cylindrical hoop 1 by injection molding, the second limiting member 102 will be integrated with the other end surface of the iron core 2 and the outer peripheral surface of the cylindrical hoop 1, so as to limit the movement of the magnet 3 and the iron core 2 in the first direction (shown in the Z direction in fig. 6).

Illustratively, the material of the cylindrical hoop 1 may be plastic or metal.

In some possible embodiments, referring to fig. 5, the first limiting member 101 has a ring shape, and a hollow portion thereof can be exposed out of the rotating shaft hole 5 to ensure the normal operation of the motor rotor 4.

In some possible embodiments, referring to fig. 5 and 6, the second limiting member 102 has a ring shape, and a hollow portion thereof can be exposed out of the rotating shaft hole 5 to ensure the normal operation of the motor rotor. As an example. The hollow portions of the first limiting member 101 and the second limiting member 102 are communicated with each other along a first direction (shown as a Z direction in fig. 5) for inserting a rotating shaft.

In some possible embodiments, referring to fig. 5, the first limiting member 101 does not completely cover an end surface of the core 2 in the first direction (shown in the Z direction in fig. 5), and a part of the core 2 in a ring shape is exposed. Illustratively, the first limiting member 101 does not completely cover one end surface of the core 2, and the rotating shaft hole 5 needs to be exposed to ensure the normal operation of the motor rotor 4.

In some possible embodiments, referring to fig. 5 and 6, the second limiting member 102 does not completely cover the other end surface of the iron core 2 in the first direction (shown in the Z direction in fig. 6), and a part of the iron core 2 in a ring shape is exposed. Illustratively, the second limiting member 102 does not completely cover the other end surface of the core 2, and the rotating shaft hole 5 needs to be exposed to ensure the normal operation of the motor rotor 4.

In some possible embodiments, referring to fig. 3 and 4, the magnet 3 and the core 2 are attached to each other in the magnet holder 103. Illustratively, the magnet receptacle 103 is a square slot that is sized to accommodate the configuration of the magnet 3 to achieve a snug fit of the magnet receptacle 103 with the magnet 3, better secure the core 2 and magnet 3, and limit movement of the magnet 3 in a first direction (shown in the Z-direction in fig. 3).

While the invention has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those skilled in the art that the foregoing is a more detailed description of the invention, and the specific embodiments thereof are not to be considered as limiting. Various changes in form and detail, including simple deductions or substitutions, may be made by those skilled in the art without departing from the spirit and scope of the invention.

Claims (10)

1. An electric machine rotor, comprising: the device comprises an iron core, a plurality of magnets, a cylindrical hoop, a first limiting piece and a second limiting piece;

a plurality of clamping blocks are arranged on the inner wall of the cylindrical hoop at intervals along the circumferential direction;

a plurality of clamping grooves which correspond to the clamping blocks one to one are formed in the peripheral surface of the iron core along the circumferential direction, each clamping block is clamped with each clamping groove, so that two adjacent clamping blocks, the peripheral surface of the iron core and the inner wall of the cylindrical hoop form a magnet accommodating part, and each magnet is accommodated in the magnet accommodating part;

the first limiting part and the second limiting part are located on two opposite sides of the cylindrical hoop in the first direction, the circumferential direction surrounds the first direction, and the first limiting part and the second limiting part respectively cover two opposite sides of the magnet containing parts so as to limit the movement of the magnets in the magnet containing parts in the first direction.

2. The electric motor rotor as claimed in claim 1, wherein the first retaining member covers an end surface of the core in the first direction, an end surface of the cylindrical hoop in the first direction, and end surfaces of all the fixture blocks in the first direction.

3. The electric motor rotor as claimed in claim 1, wherein the second retaining member covers the other end surface of the core in the first direction, the other end surface of the cylindrical hoop in the first direction, and the other end surfaces of all the fixture blocks in the first direction.

4. An electric machine rotor as claimed in any of claims 1 to 3, characterized in that the first retaining member is injection moulded from plastic.

5. An electric machine rotor as claimed in any of claims 1 to 3, characterized in that the second retaining means is injection moulded from plastic.

6. The electric machine rotor as recited in claim 1, wherein the first retaining member is annular.

7. The electric machine rotor as recited in claim 1, wherein the second retaining member is annular.

8. The electric motor rotor as claimed in claim 2 or 6, wherein the first stopper does not completely cover an end face of the core in the first direction, and a portion of the core in a ring shape is exposed.

9. The motor rotor according to claim 3 or 7, wherein the second retaining member does not completely cover the other end surface of the core in the first direction, and a portion of the core in a ring shape is exposed.

10. The electric machine rotor as recited in claim 1, wherein the magnet and the core are snugly joined at the magnet receiving portion.

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