CN219107258U

CN219107258U - Permanent magnet brush DC motor stator chute assembly fixture

Info

Publication number: CN219107258U
Application number: CN202320094671.3U
Authority: CN
Inventors: 沈明; 吴振献; 孙洪发; 赵强; 王康; 杨昇
Original assignee: Changzhou Yucheng Futong Motor Co Ltd
Current assignee: Changzhou Yucheng Futong Motor Co Ltd
Priority date: 2023-02-01
Filing date: 2023-02-01
Publication date: 2023-05-30
Anticipated expiration: 2033-02-01

Abstract

The utility model discloses a permanent magnet brush direct current motor stator chute assembly fixture, which comprises a positioning column, a positioning insert, an upper pressing plate, a gasket, a lower pressing plate, a bolt and a nut, wherein the positioning insert is arranged on the positioning column; at least one groove is formed in the outer wall surface of the positioning column along the axial direction, a first through hole is formed in the central part of the positioning column, the positioning embedded block is embedded in the groove, a positioning inclined strip with a rectangular cross section is arranged on the outer side surface of the positioning embedded block along the length direction, the upper pressing plate is cylindrical, a second through hole is formed in the central part, the lower pressing plate is cylindrical, a third through hole is formed in the central part, a first blind hole is formed in the top surface of the lower pressing plate, the upper pressing plate, the gasket and the lower pressing plate are sequentially arranged from top to bottom, the top of the positioning column is arranged in a space surrounded by the upper pressing plate and the gasket, the bottom of the positioning column is arranged in the first blind hole of the lower pressing plate, and the end of the bolt sequentially penetrates through the second through hole, the first through hole, the third through hole and the nut. The utility model shortens the assembly time and improves the production efficiency.

Description

Permanent magnet brush DC motor stator chute assembly fixture

Technical Field

The utility model relates to a motor assembly fixture, in particular to a permanent magnet brush direct current motor stator chute assembly fixture, and belongs to the technical field of motors.

Background

The stator is a static part of the motor and consists of a stator core, a stator winding and a fixed seat, and the main function of the stator is to generate a rotating magnetic field. Because stator core fluting and rotor permanent magnet interact, has formed tooth harmonic electromagnetic torque, has increaseed motor noise, vibration, has increased eddy current loss etc. therefore usually adopted stator chute, rotor oblique pole, score groove, rotor to open structure such as false slot to weaken the harmful effects that the tooth's socket effect brought and improve motor performance. For medium and small permanent magnet motors, particularly permanent magnet brushed direct current motors, the most common method is to use a stator chute structure to weaken the cogging.

At present, most of inner chute stator assembly adopts a manual operation method, the stator chute is assembled by means of manual operation of operators, tools such as a poking sheet, an iron stick and a bamboo stick are used during operation, the relative positions among stator core punching sheets are continuously adjusted by manually poking single stator punching sheets through operators to realize the chute, extremely high requirements are provided for the operation method and experience of the operators, and even the skilled operators can use the time and the time, so that the assembly is time-consuming and labor-consuming, the production efficiency is low, and the motor performance cannot be guaranteed.

Disclosure of Invention

The utility model aims to solve the technical problem of overcoming the defects of the prior art, and provides the stator chute assembly fixture of the permanent magnet brush direct current motor, which has the advantages of simple structure, convenient operation, capability of greatly improving the production efficiency, high accuracy of the angle of the stator chute and capability of ensuring the motor performance.

In order to solve the technical problems, the utility model adopts the permanent magnet brushed direct current motor stator chute assembly fixture which comprises a cylindrical positioning column, a positioning insert with a rectangular strip-shaped section, an upper pressing plate, a circular washer, a lower pressing plate, a bolt and a nut; at least one groove is formed in the outer wall surface of the positioning column along the axial direction, a first through hole for the bolt to pass through is formed in the central part of the positioning column, the positioning embedded block is embedded in the groove, a positioning inclined strip with a rectangular cross section is arranged on the outer side surface of the positioning embedded block along the length direction, the included angle between the positioning inclined strip and the vertical direction is 5.5-6.5 degrees, the width of the positioning inclined strip is 1.5-2.5 mm, the upper pressing plate is cylindrical, a second through hole for the bolt to pass through is formed in the central part of the upper pressing plate, a third through hole for the bolt to pass through is formed in the central part of the lower pressing plate, a first blind hole is formed in the top surface of the lower pressing plate, the upper pressing plate, the gasket and the lower pressing plate are sequentially arranged from top to bottom, the top of the positioning column is arranged in a space surrounded by the upper pressing plate and the gasket, the end part of the bolt sequentially passes through the second through hole, the first through hole and the third through hole to be connected with the nut.

As a preferred embodiment of the present utility model, the angle between the positioning diagonal bar and the vertical direction is 6.09 °, and the width of the positioning diagonal bar is 2 mm.

As a preferred implementation mode of the utility model, three grooves are axially formed in the outer wall surface of the positioning column, and the three grooves are uniformly distributed in the radial direction.

As a preferred embodiment of the utility model, the bottom surface of the upper pressing plate is provided with a second blind hole, the top surface of the gasket is provided with a circular boss, and the boss is embedded in the second blind hole.

After the structure is adopted, the utility model has the following beneficial effects:

when the stator punching sheet welding fixture works, a plurality of stator punching sheets are stacked on the lower pressing plate, the inclined grooves on the stator punching sheets are embedded on the positioning inclined bars of the positioning embedded blocks, after the stator punching sheets are stacked to a specified required height, a gasket and an upper pressing plate are sequentially placed above the stator punching sheets, then the end parts of bolts sequentially penetrate through the second through hole, the first through hole and the third through hole to be connected with nuts, the upper pressing plate and the lower pressing plate are tightened through rotating the nuts, and finally the stacked stator punching sheets are welded and fixed. According to the utility model, the stator punching sheets are stacked together by adopting the positioning diagonal strips, so that the stator diagonal slot angle accuracy is high, and the motor performance can be ensured to be kept good.

The second blind hole is formed in the bottom surface of the upper pressing plate, the annular boss is arranged on the top surface of the gasket, and the boss is embedded in the second blind hole, so that the upper pressing plate can be placed more quickly during working, and the production efficiency is further improved.

The utility model has the advantages of simple structure, convenient operation, simplified operation steps, shortened assembly time and greatly improved production efficiency.

Drawings

The following describes the embodiments of the present utility model in further detail with reference to the drawings.

Fig. 1 is a schematic structural view of a stator chute assembly fixture for a permanent magnet brush direct current motor of the present utility model.

Fig. 2 is a schematic structural view of a positioning column in the present utility model.

Fig. 3 is a schematic top view of the positioning post of fig. 2.

Fig. 4 is a schematic view of the structure of the positioning insert of the present utility model.

FIG. 5 is a schematic view of the structure of the upper platen in the present utility model.

Fig. 6 is a schematic structural view of a gasket according to the present utility model.

Fig. 7 is a schematic structural view of a lower platen in the present utility model.

Detailed Description

Referring to the assembly fixture of the stator chute of the permanent magnet brush direct current motor shown in fig. 1 to 7, the assembly fixture comprises a cylindrical positioning column 1, a positioning insert 2 which is long-strip-shaped and has a rectangular cross section, an upper pressing plate 3, a circular washer 4, a lower pressing plate 5, a bolt 6 and a nut 7, wherein the washer 4 is preferably a nylon washer, and the rest parts are preferably steel parts; at least one groove 1-1 is formed in the outer wall surface of the positioning column 1 along the axial direction, a first through hole 1-2 for the bolt 6 to pass through is formed in the central part of the positioning column 1, the positioning embedded block 2 is slidably embedded in the groove 1-1, a positioning inclined strip 2-1 with a rectangular cross section is arranged on the outer side surface of the positioning embedded block 2 along the length direction, an included angle a between the positioning inclined strip 2-1 and the vertical direction is 5.5-6.5 degrees, the width W of the positioning inclined strip 2-1 is between 1.5-2.5 mm, the upper pressing plate 3 is cylindrical, a second through hole 3-1 for the bolt 6 to pass through is formed in the central part of the upper pressing plate 3, a third through hole 5-1 for the bolt 6 to pass through is formed in the central part of the lower pressing plate 5, the first blind hole 5-2 is formed in the top surface of the lower pressing plate 5, the upper pressing plate 3, the gasket 4 and the lower pressing plate 5 are sequentially arranged from top to bottom, the top of the positioning inclined strip 2-1 is placed in the space between the upper pressing plate 3 and the first blind hole 4 and the second through hole 1-1, the third through hole 5-1 passes through the first through hole 5-1 and the third through hole 5-1 passes through the first through hole 5-1-6 and the third through hole 1-5.

As a preferred embodiment of the present utility model, the angle a between the positioning diagonal bar 2-1 and the vertical direction is 6.09 °, and the width W of the positioning diagonal bar 2-1 is 2 mm.

As a preferred embodiment of the utility model, three grooves 1-1 are axially formed on the outer wall surface of the positioning column 1, and the three grooves 1-1 are uniformly distributed along the radial direction. The positioning insert 2 can be embedded in one of the grooves 1-1, and the structure facilitates the assembly work.

As a preferred embodiment of the present utility model, as shown in fig. 1, 5 and 6, the bottom surface of the upper pressing plate 3 is provided with a second blind hole 3-2, the top surface of the gasket 4 is provided with a circular boss 4-1, and the boss 4-1 is embedded in the second blind hole 3-2, so that the upper pressing plate 3 can be placed more quickly, and the production efficiency is further improved.

When the utility model works, a plurality of stator punching sheets 8 are stacked on the lower pressing plate 5, the inclined grooves on the stator punching sheets 8 are embedded on the positioning inclined bars 2-1 of the positioning embedded blocks 2, after the stator punching sheets 8 are stacked to a specified required height, the washers 4 and the upper pressing plate 3 are sequentially placed above the stator punching sheets 8, then the end parts of the bolts 6 sequentially penetrate through the second through holes 3-1, the first through holes 1-2 and the third through holes 5-1 to be connected with the nuts 7, the upper pressing plates 3 and the lower pressing plates 5 are tightened through the rotating nuts 7, and finally the stacked stator punching sheets 8 are welded and fixed.

Through trial, the utility model has the advantages of simple structure, convenient operation, shortened assembly time, greatly improved production efficiency, ensured motor performance and good practical effect.

Claims

1. A permanent magnet brush direct current motor stator chute assembly fixture which is characterized in that: the positioning device comprises a cylindrical positioning column (1), a positioning insert (2) which is long and has a rectangular section, an upper pressing plate (3), a circular gasket (4), a lower pressing plate (5), a bolt (6) and a nut (7); at least one groove (1-1) is axially formed in the outer wall surface of the positioning column (1), a first through hole (1-2) through which a bolt (6) passes is formed in the central part of the positioning column (1), the positioning insert (2) is embedded in the groove (1-1), a positioning inclined strip (2-1) with a rectangular cross section is arranged on the outer side surface of the positioning insert (2) along the length direction, an included angle (a) between the positioning inclined strip (2-1) and the vertical direction is 5.5-6.5 DEG, the width (W) of the positioning inclined strip (2-1) is 1.5-2.5 mm, the upper pressing plate (3) is cylindrical, a second through hole (3-1) through which the bolt (6) passes is formed in the central part, the lower pressing plate (5) is cylindrical, a third through hole (5-1) through which the bolt (6) passes is formed in the central part, a first blind hole (5-2) is formed in the top surface of the lower pressing plate (5), the upper pressing plate (3) and the lower pressing plate (4) are sequentially arranged in the top of the space (1) between the upper pressing plate and the lower pressing plate (1) and the bottom (1), the end part of the bolt (6) sequentially passes through the second through hole (3-1), the first through hole (1-2) and the third through hole (5-1) to be connected with the nut (7).

2. The permanent magnet brushed direct current motor stator chute assembly fixture of claim 1, wherein: the included angle (a) between the positioning inclined strip (2-1) and the vertical direction is 6.09 degrees, and the width (W) of the positioning inclined strip (2-1) is 2 mm.

3. The permanent magnet brushed direct current motor stator chute assembly fixture of claim 1 or 2, wherein: three grooves (1-1) are axially formed in the outer wall surface of the positioning column (1), and the three grooves (1-1) are uniformly distributed in the radial direction.

4. The permanent magnet brushed direct current motor stator chute assembly fixture of claim 1 or 2, wherein: the bottom surface of the upper pressing plate (3) is provided with a second blind hole (3-2), the top surface of the gasket (4) is provided with a circular boss (4-1), and the boss (4-1) is embedded in the second blind hole (3-2).