CN116032042A - Permanent magnet installation device and method for outer rotor permanent magnet motor - Google Patents

Abstract

The invention discloses a permanent magnet installation device for an outer rotor permanent magnet motor, which comprises a positioning cylinder, one end of the positioning cylinder is provided with a limiting edge turned outward, and a plurality of winding positioning cylinders are arranged on the peripheral wall of the positioning cylinder The positioning grooves are evenly spaced on the central axis of the body, and the positioning grooves penetrate the peripheral wall of the positioning cylinder along the radial direction of the positioning cylinder. Also disclosed is a permanent magnet installation method for an outer rotor permanent magnet motor, which is carried out by using a permanent magnet installation device for an outer rotor permanent magnet motor, comprising the following steps: applying adhesive glue; assembling the permanent magnet installation device; installing the permanent magnet; removing the permanent magnet Magnet mount. The permanent magnet installation device and installation method for the outer rotor permanent magnet motor have simple structure and convenient operation, and can improve the assembly quality and installation efficiency of the permanent magnet.

Description

A permanent magnet installation device and installation method for an outer rotor permanent magnet motor

technical field

The invention relates to the technical field of outer rotor permanent magnet motors, in particular to a permanent magnet installation device and installation method for outer rotor permanent magnet motors.

Background technique

Compared with asynchronous motors and DC motors, permanent magnet motors have outstanding advantages such as energy saving, high efficiency, environmental protection, small size, light weight, and high power density per unit mass. With the rapid development of electric vehicles, high-speed rail, urban subway, intercity light rail and other transportation fields, the permanent magnet synchronous traction motor has the advantages mentioned above and meets the actual requirements of green, environmental protection and energy saving in today's era. The application of permanent magnet synchronous traction motors is becoming more and more popular. After the permanent magnet synchronous motors have initially achieved scale and industrialization in high-speed railways, subways, intercity light rails, urban buses and household passenger vehicles, they have begun to enter the field of special automobiles (mainly various cargo transportation vehicles and transportation vehicles for special equipment) ). Compared with the traditional permanent magnet motor, the permanent magnet motor required in the special automobile industry has undergone major changes in structure, mainly because the traditional rotor inside and stator outside is changed to a structure with stator inside and rotor outside (commonly known as outer rotor structure). Therefore, the permanent magnet assembly of the outer rotor has become one of the key technologies in the manufacture of the permanent magnet motor, and it is necessary to develop a suitable permanent magnet assembly tool.

In the traditional permanent magnet motor with inner rotor structure, the rotor consists of a shaft, a front pressure ring, a rotor punch, a rear pressure ring, a permanent magnet, epoxy glue or impregnated paint, a stop washer and a lock nut. The permanent magnet assembly grooves are evenly distributed on the rotor punch, and the permanent magnet can be easily and quickly assembled into the rotor core by using the permanent magnet assembly mold and the permanent magnet push rod. By pouring epoxy glue or impregnating paint into the gap of the permanent magnet slot and then curing it, the pressure ring, stop washer and lock nut are axially locked and fixed, and the permanent magnet and the rotor core become a whole with good strength. And stiffness, the permanent magnets are fixed in the rotor core and cannot be loosened.

The outer rotor required in the special automotive industry has a simple structure, and the rotor consists of a rotor bracket, permanent magnets and adhesive. In order to reduce the production cost, the inner surface of the rotor bracket (permanent magnet assembly surface) does not open the permanent magnet assembly groove, and the permanent magnet assembly is completed by evenly applying adhesive glue on the inner surface of the rotor bracket and the bonding surface of the permanent magnet and the inner surface of the rotor bracket. After the permanent magnets are assembled, each row of permanent magnets is required to be uniform in the axial direction of the rotor and evenly distributed in the circumferential direction (that is, the gaps in the circumferential direction of the permanent magnets are uniform) to meet the performance of the motor.

The inner surface of the rotor bracket of the outer rotor permanent magnet motor is not processed with permanent magnet assembly grooves, and the inner surface is very smooth. 140°C, heat preservation for 2.5 hours) before curing, it is toothpaste-like and cannot effectively fix the position of the permanent magnet. In addition, the distance between each row of permanent magnets in the circumferential direction of the inner surface of the rotor bracket is very close, and each permanent magnet has strong magnetism, and the polarities of two adjacent rows of permanent magnets are different. Therefore, when the permanent magnets are assembled, the permanent magnets are very easy to attract each other, and the purpose of qualified permanent magnet assembly cannot be achieved.

Contents of the invention

The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a permanent magnet mounting device for an outer rotor permanent magnet motor with simple structure, convenient operation, and the ability to improve the assembly quality and device efficiency of the permanent magnet;

Further provided is a permanent magnet installation method for an outer rotor permanent magnet motor which is easy to operate and can improve the assembly quality and device efficiency of the permanent magnet.

In order to solve the problems of the technologies described above, the present invention adopts the following technical solutions:

A permanent magnet installation device for an outer rotor permanent magnet motor, comprising a positioning cylinder, one end of the positioning cylinder is provided with a limiting edge turned outward, and a plurality of winding positioning cylinders are arranged on the peripheral wall of the positioning cylinder The central axis of the body is evenly spaced with positioning grooves, and the positioning grooves penetrate the peripheral wall of the positioning cylinder along the radial direction of the positioning cylinder.

As a further improvement of the above technical solution:

The positioning cylinder is provided with a positioning piece for positioning and installing with the rotor bracket.

The positioning member is arranged on the limiting edge.

The positioning cylinder is provided with a fixing piece for fixed connection with the rotor bracket.

The positioning member is arranged on the limiting edge.

The positioning member is a positioning pin, and the fixing member is a fixing screw.

The positioning slot runs through to the other end of the positioning cylinder.

The width of the positioning groove is the same as that of the permanent magnet.

The material of the positioning cylinder is stainless steel.

A permanent magnet installation method for an outer rotor permanent magnet motor, which is carried out by using the above permanent magnet installation device for an outer rotor permanent magnet motor, comprising the following steps:

S1. Apply adhesive glue: apply a layer of adhesive glue on the inner surface of the rotor bracket where the permanent magnet is installed;

S2. Assemble the permanent magnet installation device: Assemble the positioning cylinder of the permanent magnet installation device into the rotor bracket, make the limit edge against the end surface of the rotor bracket, the positioning cylinder and the rotor bracket are coaxial, and the positioning groove is in the rotor bracket Surface-mounted permanent magnets correspond to intervals;

S3. Installing the permanent magnet: Apply a layer of adhesive on the surface of the permanent magnet to be installed, and then assemble the permanent magnet to be installed on the inner surface of the rotor bracket in sequence through the positioning groove of the positioning cylinder until it reaches the inside of the rotor bracket. The surface is bonded along each positioning groove to form multiple rows of permanent magnets, and the assembly of the permanent magnets is completed;

S4. Remove the permanent magnet installation device: remove the positioning cylinder from the rotor bracket.

Compared with the prior art, the present invention has the advantages of:

The use process of the permanent magnet installation device for the outer rotor permanent magnet motor of the present invention: firstly, apply a layer of adhesive glue on the inner surface of the rotor bracket where the permanent magnet is installed; secondly, assemble the positioning cylinder of the permanent magnet installation device to the rotor bracket In the process, make the limit side against the end face of the rotor bracket, the positioning cylinder and the rotor bracket are coaxial, and the positioning groove corresponds to the section where the permanent magnet is installed on the inner surface of the rotor bracket; then, apply a layer of adhesive on the surface of the permanent magnet to be installed. Glue, and then assemble the permanent magnets to be installed on the inner surface of the rotor bracket in sequence through the positioning grooves of the positioning cylinder until the inner surface of the rotor bracket is bonded along each positioning groove to form multiple rows of permanent magnets, and the permanent magnet assembly is completed; Then, remove the positioning cylinder from the rotor bracket. Under the positioning action of the positioning grooves evenly distributed in the circumferential direction of the positioning cylinder, the permanent magnets are effectively assembled on the inner surface of the rotor bracket, and it is ensured that after the permanent magnets are assembled, each row of permanent magnets is arranged neatly in the axial direction of the rotor bracket , the gap between two adjacent rows of permanent magnets is uniform, which improves the assembly quality. The permanent magnet installation device has simple structure and convenient operation, and can improve the assembly quality and device efficiency of the permanent magnet.

The permanent magnet installation method for the outer rotor permanent magnet motor of the present invention effectively assembles the permanent magnets on the inner surface of the rotor bracket under the positioning action of the positioning grooves evenly distributed in the circumferential direction of the positioning cylinder, and ensures that the permanent magnets are assembled , each row of permanent magnets is arranged neatly in the axial direction of the rotor support, and the gap between two adjacent rows of permanent magnets is uniform, which improves the assembly quality. The installation method of the permanent magnet is convenient to operate, and can improve the assembly quality and device efficiency of the permanent magnet.

Description of drawings

Fig. 1 is a schematic cross-sectional structure diagram of a permanent magnet installation device for an outer rotor permanent magnet motor of the present invention.

Fig. 2 is a view of the use state of the permanent magnet installation device for the outer rotor permanent magnet motor of the present invention.

Fig. 3 is a schematic diagram of the main sectional structure after the permanent magnet is installed on the rotor bracket.

Fig. 4 is a schematic diagram of a top-down section of a permanent magnet mounted on a rotor bracket.

Each label in the figure means:

1. Positioning cylinder; 2. Limiting edge; 3. Positioning slot; 4. Rotor support; 41. Guide hole; 5. Positioning piece; 6. Fixing piece; 7. Permanent magnet.

Detailed ways

The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

Embodiment one:

Fig. 1 and Fig. 2 have shown a kind of embodiment of the permanent magnet installation device for outer rotor permanent magnet motor of the present invention, this permanent magnet installation device for outer rotor permanent magnet motor comprises positioning cylinder 1, and one end of positioning cylinder 1 is provided with There is a limiting edge 2 turned outward, and a plurality of positioning grooves 3 arranged at even intervals around the central axis of the positioning cylinder 1 are arranged on the peripheral wall of the positioning cylinder 1, and the positioning grooves 3 run through the positioning cylinder 1 in the radial direction The surrounding wall of cylinder 1.

Use process: first, apply a layer of adhesive glue on the inner surface of the rotor bracket 4 where the permanent magnet 7 is installed; secondly, assemble the positioning cylinder 1 of the permanent magnet installation device into the rotor bracket 4, so that the limit side 2 is against the rotor On the end face of the bracket 4, the positioning cylinder 1 and the rotor bracket 4 are coaxial, and the positioning groove 3 corresponds to the interval of the permanent magnet 7 on the inner surface of the rotor bracket 4; then, apply a layer of adhesive on the surface of the permanent magnet 7 to be installed , and then assemble the permanent magnets 7 to be installed on the inner surface of the rotor bracket 4 in sequence through the positioning slots 3 of the positioning cylinder 1, until the inner surface of the rotor bracket 4 is bonded along each positioning slot 3 to form multiple rows of permanent magnets 7, The assembly of the permanent magnet 7 is completed; then, the positioning cylinder 1 is removed from the rotor bracket 4 (as shown in Fig. 3 and Fig. 4 ). Under the positioning action of the positioning grooves 3 evenly distributed in the circumferential direction of the positioning cylinder 1, the permanent magnets 7 are effectively assembled on the inner surface of the rotor bracket 4, and after the permanent magnets 7 are assembled, each row of permanent magnets 7 is on the rotor bracket. The axial direction of 4 is neatly arranged, and the gap between two adjacent rows of permanent magnets 7 is even, which improves the assembly quality. The permanent magnet installation device has simple structure and convenient operation, and can improve the assembly quality and device efficiency of the permanent magnet 7 .

In this embodiment, the positioning cylinder 1 is provided with a positioning member 5 for positioning and installing with the rotor bracket 4 . During the process of assembling the positioning cylinder 1 to the rotor bracket 4 , under the positioning and guiding action of the positioning member 5 , the coaxial installation of the positioning cylinder 1 and the rotor bracket 4 can be ensured. The positioning member 5 is arranged on the limiting edge 2 . The positioning member 5 is a positioning pin and is perpendicular to the axial direction of the positioning cylinder 1 . At least two positioning pieces 5 are arranged at intervals along the limit side 2. The end surface of the rotor bracket 4 is provided with a guide hole 41 for inserting the positioning piece 5. Under the cooperation and guidance of the positioning piece 5 and the guide hole 41, the positioning cylinder 1 is inserted axially into the rotor bracket 4 to ensure coaxiality after assembly. The positioning pin is made of steel and is used to position the positioning cylinder 1 and the rotor bracket 4 to ensure that the S and N pole distribution of the permanent magnet 7 meets the requirements of the product drawing.

In this embodiment, the positioning cylinder 1 is provided with a fixing part 6 for fixed connection with the rotor bracket 4 . After the positioning cylinder body 1 is installed and positioned, it is fixed by the fixing member 6 . The positioning member 5 is arranged on the limiting edge 2 .

In this embodiment, the fixing member 6 is a fixing screw, and the fixing screw is threaded on the limit side 2. After the positioning cylinder 1 is installed and positioned, it is fixed on the end surface of the positioning cylinder 1 by the fixing screw. The structure is simple. Easy to operate. The fixing screw is an ordinary hexagonal head steel bolt with a blackened appearance and a strength of 8.8, which is used to fix the limit side 2 and the rotor bracket 4, so as to ensure that the positioning cylinder 1 and the rotor bracket 4 do not shift each other during the assembly process of the permanent magnet 7 , to ensure the assembly quality of the permanent magnet 7 .

In this embodiment, the positioning groove 3 runs through to the other end of the positioning cylinder 1 .

In this embodiment, the width of the positioning groove 3 is the same as that of the permanent magnet 7 . The positioning groove 3 is rectangular, and the length is longer than the length of each row of permanent magnets 7 of the rotor support 4 by a permanent magnet 7 length. The width of the positioning slot 3 is the same as that of the permanent magnet 7 , but a small gap tolerance is added so that the permanent magnet 7 can be smoothly assembled to the inner surface of the rotor bracket 4 through the rectangular positioning slot 3 .

In this embodiment, the material of the positioning cylinder 1 is stainless steel, which has high strength and has no magnetic attraction effect with the permanent magnet 7 to avoid affecting the installation of the permanent magnet 7 .

Embodiment two:

A permanent magnet installation method for an outer rotor permanent magnet motor, which is carried out by using the permanent magnet installation device for an outer rotor permanent magnet motor of Embodiment 1, comprising the following steps:

S1. Apply adhesive glue: apply a layer of adhesive glue on the inner surface of the rotor bracket 4 where the permanent magnet 7 is installed; specifically, apply a layer of adhesive glue evenly on all the intervals where the permanent magnet 7 is installed on the inner surface of the rotor bracket 4;

S2. Assemble the permanent magnet installation device: assemble the positioning cylinder 1 of the permanent magnet installation device into the rotor bracket 4, make the limit side 2 abut against the end face of the rotor bracket 4, and position the cylinder 1 and the rotor bracket 4 coaxially, The positioning groove 3 corresponds to the section of the permanent magnet 7 installed on the inner surface of the rotor bracket 4;

Among them, during the process of assembling the positioning cylinder 1 of the permanent magnet installation device to the rotor bracket 4, use positioning pins to position the two; after the position is installed in place, fix the positioning cylinder 1 and the rotor bracket 4 with fixing screws ;

S3. Installing the permanent magnet 7: apply a layer of adhesive on the surface of the permanent magnet 7 to be installed, and then assemble the permanent magnet 7 to be installed to the inner surface of the rotor bracket 4 in sequence through the positioning groove 3 of the positioning cylinder 1 until the inner surface of the rotor bracket 4 is bonded along each positioning groove 3 to form multiple rows of permanent magnets 7, and the assembly of the permanent magnets 7 is completed;

Specifically, the surface of the permanent magnet 7 in contact with the rotor bracket 4 and the two axial surfaces of the permanent magnet 7 are uniformly coated with a layer of adhesive glue, and then the permanent magnet 7 is assembled on the inner surface of the rotor bracket 4 through the positioning groove 3, and the Install the permanent magnets 7 row by row until the permanent magnets 7 are assembled, then use the push rod to adjust the position of each row of permanent magnets until they meet the requirements;

S4. Remove the permanent magnet installation device: remove the positioning cylinder 1 from the rotor bracket 4 . Specifically, after removing the positioning pins and fixing screws, the positioning cylinder 1 is disassembled from the rotor bracket 4 . Finally, as shown in Figure 3 and Figure 4.

In this permanent magnet installation method, under the positioning action of the positioning slots 3 evenly distributed in the circumferential direction of the positioning cylinder 1, the permanent magnets 7 are effectively assembled on the inner surface of the rotor bracket 4, and it is ensured that after the permanent magnets 7 are assembled, each row The permanent magnets 7 are arranged neatly in the axial direction of the rotor support 4, and the gaps between two adjacent rows of permanent magnets 7 are uniform, which improves the assembly quality. The permanent magnet installation method is convenient to operate, and can improve the assembly quality and device efficiency of the permanent magnet 7 .

Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Any person familiar with the art, without departing from the scope of the technical solution of the present invention, can use the technical content disclosed above to make many possible changes and modifications to the technical solution of the present invention, or modify it into an equivalent implementation of equivalent changes example. Therefore, any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention shall fall within the protection scope of the technical solution of the present invention.

Claims (10)

1. The utility model provides a permanent magnet installation device for external rotor permanent magnet motor which characterized in that: including location barrel (1), the one end of location barrel (1) is equipped with spacing limit (2) of outside upset, be equipped with many constant head tank (3) of evenly spaced arrangement around location barrel (1) center pin on the perisporium of location barrel (1), constant head tank (3) run through in the perisporium of location barrel (1) along the radial of location barrel (1).

2. The permanent magnet mounting device for an outer rotor permanent magnet motor according to claim 1, wherein: the positioning barrel (1) is provided with a positioning piece (5) for positioning and mounting with the rotor bracket (4).

3. The permanent magnet mounting device for an outer rotor permanent magnet motor according to claim 2, wherein: the locating piece (5) is arranged on the limiting edge (2).

4. The permanent magnet mounting device for an outer rotor permanent magnet motor according to claim 2, wherein: the positioning cylinder body (1) is provided with a fixing piece (6) which is fixedly connected with the rotor bracket (4).

5. The permanent magnet mounting device for an outer rotor permanent magnet motor according to claim 4, wherein: the locating piece (5) is arranged on the limiting edge (2).

6. The permanent magnet mounting device for an outer rotor permanent magnet motor according to claim 5, wherein: the locating piece (5) is a locating pin, and the fixing piece (6) is a fixing screw.

7. The permanent magnet mounting device for an outer rotor permanent magnet motor according to any one of claims 1 to 6, characterized in that: the positioning groove (3) penetrates through the other end of the positioning cylinder body (1).

8. The permanent magnet mounting device for an outer rotor permanent magnet motor according to any one of claims 1 to 6, characterized in that: the width of the positioning groove (3) is the same as that of the permanent magnet (7).

9. The permanent magnet mounting device for an outer rotor permanent magnet motor according to any one of claims 1 to 6, characterized in that: the positioning cylinder body (1) is made of stainless steel.

10. A permanent magnet mounting method for an outer rotor permanent magnet motor, characterized by using the permanent magnet mounting device for an outer rotor permanent magnet motor according to any one of claims 1 to 9, comprising the steps of:

s1, smearing adhesive: a layer of adhesive is smeared between the permanent magnet (7) arranged on the inner surface of the rotor bracket (4);

s2, assembling a permanent magnet mounting device: assembling a positioning cylinder body (1) of the permanent magnet mounting device into a rotor bracket (4), enabling a limiting edge (2) to abut against the end face of the rotor bracket (4), enabling the positioning cylinder body (1) and the rotor bracket (4) to be coaxial, and enabling a positioning groove (3) to correspond to a section of the inner surface of the rotor bracket (4) where a permanent magnet (7) is arranged;

s3, mounting a permanent magnet (7): coating a layer of adhesive on the surface of a permanent magnet (7) to be installed, and then sequentially assembling the permanent magnet (7) to be installed on the inner surface of a rotor bracket (4) through positioning grooves (3) of a positioning cylinder body (1) until the inner surface of the rotor bracket (4) is adhered along each positioning groove (3) to form a plurality of rows of permanent magnets (7), wherein the permanent magnets (7) are assembled;

s4, dismantling the permanent magnet installation device: the positioning cylinder (1) is removed from the rotor bracket (4).

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