CN214281176U - AC brush motor and power assembly thereof - Google Patents

Abstract

The utility model discloses an AC brush motor and a power assembly thereof, the AC brush motor comprises a bracket body, a bearing piece, an output shaft, a rotor winding and a stator winding, the output shaft can be rotatably arranged on the bracket body around the rotary axle center of the output shaft through the bearing piece, the rotor winding is fixed on the output shaft, the bracket body is enclosed to form a cavity for accommodating the rotor winding, the stator winding comprises a stator coil and a magnetic conduction piece fixed on the bracket body, the magnetic conduction piece comprises an installation part and two magnetic pole parts, the two magnetic pole parts are respectively connected with the installation part and are arranged at intervals, the stator coil is wound on the outer surface of the installation part, and is connected with the mounting part in an insulating way, the mounting part is used for positioning and mounting the stator coil on one side of the rotor winding along the radial direction of the rotating axis, the stator coil is used for exciting the two magnetic pole parts, so that the two magnetic pole parts can form a pair of magnetic poles with opposite polarities and a magnetic gap for the rotor winding to cut magnetic lines of force. The whole volume of the alternating current motor connected to the power assembly can be reduced, and the installation convenience is better.

Description

AC brush motor and power assembly thereof

Technical Field

The utility model relates to an electric tool technical field especially relates to an exchange brush motor and power assembly thereof.

Background

In the manufacturing industry of modern electric tools, motors are widely used as important power elements, and the motors can be classified into brush motors and brushless motors, wherein the brush motors generally comprise stator windings, rotor windings and output shafts. The rotor winding comprises a commutator and an electric brush matched with the commutator, so that the rotor winding can meet the rotation requirement according to the requirement of a user, and the rotor winding is connected with the output shaft and used for outputting power outwards.

The existing brush motor is more in the form of an alternating current series motor, the brush part of the brush motor can be arranged at any position of the periphery of an output shaft corresponding to a commutator no matter what specific form the brush motor is used, compared with the prior art, the position of a stator winding is stiff, the stator winding forms magnetic poles respectively and is positioned at the opposite side of the radial direction of the output shaft, the overall space arrangement of the alternating current brush motor is not facilitated, the position of the alternating current brush motor is easily limited when the alternating current brush motor is connected with a gearbox and connected into a power assembly, and the installation convenience is poor.

Disclosure of Invention

In order to solve the inconvenient technical problem of installation when having brush motor to insert power assembly among the prior art, the utility model provides an exchange and have brush motor and power assembly thereof can optimize the space arrangement that exchanges and have brush motor, can save the whole volume after this alternating current motor inserts power assembly again, installation convenience preferred.

The utility model discloses a following technical scheme realizes:

the utility model provides an exchange and have brush motor, includes support body, bearing piece, output shaft, rotor winding and stator winding, the output shaft passes through the bearing piece can rotate around its gyration axle center and set up on the support body, the rotor winding is fixed on the output shaft, the support body encloses to close and forms and is used for accomodating the cavity of rotor winding, stator winding includes stator coil and fixes magnetic conduction spare on the support body, magnetic conduction spare includes the installation department, and respectively with the magnetic pole portion that two intervals that the installation department links to each other set up, stator coil is in the surface of installation department is around putting, and with the installation department is insulating continuous, the installation department is used for making stator coil location installs rotor winding follows the radial one side in gyration axle center, stator coil is used for exciting two magnetic pole portions, so that two magnetic pole portion can form a pair of magnetic pole opposite in polarity and supply rotor winding cutting magnetic line of force The magnetic gap of (2).

Preferably, the magnetic pole portion includes an extension section for connecting with the mounting portion, and a butt section for approaching the rotor winding to form a magnetic pole, and the extension sections intersect and are disposed perpendicular to the extending direction of the mounting portion.

Preferably, the support body is including being used for constituting the structure fishplate bar of cavity lateral wall, and adjoin to construct the breach of fishplate bar both sides, construct the fishplate bar and correspond the installation department setting of magnetic conduction piece, so that stator winding fixes the support body back of the body to one side of cavity, the breach supplies the magnetic pole portion of magnetic conduction piece steps down, so that the butt joint section can stretch into in the cavity.

Preferably, the butt joint section is arranged in a sector ring shape, the inner side surface of the sector ring of the butt joint section is used for adapting to the outer diameter of the rotor winding, and the circumferential angle of the inner side of the sector ring is smaller than or equal to 180 degrees.

Preferably, the ac brushed motor further includes a commutator electrically connected to the rotor winding, the commutator is mounted on the output shaft, the bracket body further includes a second connection plate connected to the connection plate, the second connection plate and the connection plate form a second cavity for accommodating the commutator, and the second connection plate is used for mounting the brush, so that the brush can abut against the commutator to generate electrical connection.

Preferably, the stator winding still includes the insulator body, the installation department is the column and extends the setting, the insulator body form with the mounting hole of installation department outer cylinder adaptation, the insulator body passes through the mounting hole is fixed on the installation department.

Preferably, the insulator body includes a first concave portion and a second concave portion, the open end of the first concave portion is provided with a positioning groove, the open end of the second concave portion is provided with a protrusion, and the protrusion is tightly fitted with the positioning groove, so that the first concave portion and the second concave portion surround to form a square-shaped portion with the mounting hole.

Preferably, the insulator body is provided with a plurality of protruding pieces arranged at intervals in a protruding manner towards the radial outer side of the rotation axis, a winding slot for partially accommodating the stator coil is formed between two adjacent protruding pieces, and a connecting terminal is arranged on any one of the protruding pieces.

The utility model provides an exchange brush motor power assembly, it has brush motor power assembly to exchange including worm, gear box and aforementioned exchange brush motor to exchange, the one end of output shaft passes the bearing spare sets up for through the worm with the gear box transmission is connected, in the gear box with the gear addendum circle part of worm meshing is located construct the place side setting of fishplate bar.

Preferably, the support body still include with the division board that the structure fishplate bar links to each other, the division board is used for forming in the second cavity and is used for installing the bearing frame of bearing spare, the gear box is including having an open-ended box and can sealing open-ended lid, the box with support body is integrative to be set up, the other end of output shaft is equipped with the second installation department that supplies the fan installation.

The beneficial effects of the utility model reside in that:

the utility model provides an exchange and have brush motor and power assembly thereof, the output shaft that exchanges to have brush motor can rotate around its gyration axle center through the bearing spare and set up on the support body, and the bearing spare is used for supporting the output shaft of motor. The rotor winding is fixed on the output shaft and used for converting electric energy into kinetic energy so that the output shaft can synchronously rotate along with the rotor winding. The support body is used for installing bearing piece, stator winding and rotor winding, and the inboard of support body forms the cavity. The rotor winding can be accomodate in the cavity to, the output shaft also can partly be accomodate in the cavity, plays the guard action. The magnetic conduction piece of the stator winding is fixed on the bracket body and used for limiting the stator winding to move so that the stator winding and the rotor winding positioned in the cavity are in a relatively fixed position relation. Two magnetic pole parts arranged at intervals are respectively connected with the mounting part, and the purpose is to generate two magnetic poles with opposite polarities. The stator coil of the stator winding is wound on the outer surface of the mounting part of the magnetic conduction piece and is connected with the mounting part in an insulating mode, so that current in the stator coil cannot be directly conducted to the magnetic conduction piece, the stator coil is used for exciting the two magnetic pole parts, the two magnetic pole parts can form a pair of magnetic poles with opposite polarities, the geometric centers of the two magnetic pole parts can form a connecting line, and the connecting line is used as a magnetic gap of the pair of magnetic poles with opposite polarities and used for generating magnetic lines for cutting the rotor winding. Two magnetic pole portions can independently lean on rotor winding and lie in the arbitrary contralateral of gyration axle center and form the magnetic gap, can make full use of stator coil produced magnetic field to be favorable to setting up the position and the shape of two magnetic pole portions, saved the cavity and have reduced the width of cavity on two magnetic pole portion geometric centre line directions, when will exchange brush motor and install power assembly, can not receive the influence restriction of stator coil volume on this width direction, thereby optimized spatial arrangement. When the ac brushed motor is installed in the power assembly, the worm gear-worm gearbox is taken as an example for connection, the installation part is used for positioning and installing the stator coil on one side (hereinafter referred to as the first side) of the rotor winding along the radial direction of the rotation axis, and the magnetic field of the stator coil is guided to the pair of magnetic poles through the magnetic conductive member, so that the geometric center connecting line of the two magnetic pole parts can be far away from the stator coil on the first side, and therefore the worm gear of the gearbox can be arranged on the first side, the overall volume of the ac motor after being connected into the power assembly is reduced, and the installation convenience is better.

Drawings

Fig. 1 is a schematic perspective view of an ac brush motor according to the present invention;

fig. 2 is an exploded schematic view of the ac brush motor of the present invention;

fig. 3 is a cross-sectional view of the ac brush motor of the present invention along the flux guide;

fig. 4 is a schematic diagram of the internal structure of the ac brush motor of the present invention.

Description of the reference symbols

10. A stent body; 11. a cavity; 12. constructing a board; 13. a notch; 14. a second construction board; 15. a second cavity; 16. a partition plate; 30. an output shaft; 31. a second mounting portion; 40. a rotor winding; 50. a stator winding; 52. a magnetic conductive member; 521. an installation part; 522. a magnetic pole portion; 5221. an extension section; 5222. a butt joint section; 53. an insulator body; 531. mounting holes; 532. a first concave part; 5321. positioning a groove; 533. a second concave part; 5331. a protrusion; 534. a tab; 535. a winding slot; 536. a wiring terminal; 60. an electric brush; 70. a commutator; 80. a worm; 90. a gear case; 91. an opening; 92. a box body; 93. a cover body.

Detailed Description

In order to make the objects, technical solutions and effects of the present invention clearer and clearer, the following description of the present invention will refer to the accompanying drawings and illustrate embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

The utility model discloses an AC brush motor, please refer to fig. 1 and fig. 2, AC brush motor can connect the gear box to form the power assembly, AC brush motor includes bracket body 10, bearing piece (not marked), output shaft 30, rotor winding 40 and stator winding 50, output shaft 30 can rotate around its rotation axis through the bearing piece and set up on bracket body 10, rotor winding 40 is fixed on output shaft 30, bracket body 10 encloses and forms cavity 11 for accommodating rotor winding 40, stator winding 50 includes stator coil (not marked) and magnetic conduction piece 52 fixed on bracket body 10, magnetic conduction piece 52 includes mounting portion 521, and two magnetic pole portions 522 that set up at intervals that link to mounting portion 521 respectively, stator coil is wound on the outer surface of mounting portion 521, and link to each other with mounting portion 521 in an insulating way, mounting portion 521 is used for making stator coil location install on rotor winding 40 along the radial one side of rotation axis, the stator coil is used to excite the two magnetic pole portions 522, so that the two magnetic pole portions 522 can form a pair of magnetic poles with opposite polarities and a magnetic gap for the rotor winding 40 to cut magnetic lines.

Referring to fig. 1 to 3, specifically, the output shaft 30 of the ac brush motor is rotatably provided on the bracket body 10 around the rotation axis thereof by a bearing member, which may be a rolling bearing, a sliding bearing, or the like, for supporting the output shaft 30 of the motor. The rotor winding 40 is fixed on the output shaft 30 for converting the electric energy into the kinetic energy, so that the output shaft 30 rotates synchronously with the rotor winding 40, the specific winding manner of the rotor winding 40 is not specifically limited herein, and the fixing manner of the rotor winding 40 may be various, such as: the rotor winding 40 can be positioned and mounted on the output shaft 30 by providing a keyed connection, a snap-fit connection, a glued connection, or the like. The bracket body 10 may be formed by enclosing a plurality of plates, the bracket body 10 is used for mounting the bearing member, the stator winding 50 and the rotor winding 40, a cavity 11 is formed inside the bracket body 10, and the cavity 11 may be closed or open, which will not be described in detail herein. The rotor winding 40 can be received in the cavity 11, and the output shaft 30 can also be partially received in the cavity 11 for protection. The magnetic conducting member 52 of the stator winding 50 is fixed on the bracket body 10, and it should be especially clarified here that the magnetic conducting member 52 can be connected to the bracket body 10 at the inner side of the cavity 11, and also can be connected to the bracket body 10 at the outer side of the cavity 11, so as to limit the movement of the stator winding 50, so that the stator winding 50 and the rotor winding 40 located in the cavity 11 are in a relatively fixed state, and those skilled in the art can obtain a corresponding fixing mode through the embodiments and drawings of the present invention, and detailed description is omitted here. The two magnetic pole portions 522 spaced apart from each other are connected to the mounting portion 521, which means that the two magnetic pole portions 522 are indirectly connected to each other through the mounting portion 521 and cannot be directly connected to each other, so that two magnetic poles with opposite polarities are generated. The stator coil of the stator winding 50 is wound around the outer surface of the mounting portion 521 of the magnetic conductive member 52 and is connected to the mounting portion 521 in an insulating manner, which may be mounted on the mounting portion 521 through an insulating glue or an insulating member, so that the current in the stator coil cannot be directly conducted to the magnetic conductive member 52, and the stator coil is used to excite the two magnetic pole portions 522, so that the two magnetic pole portions 522 can form a pair of magnetic poles with opposite polarities, and the geometric centers of the two magnetic pole portions 522 can form a connecting line, which serves as a magnetic gap of the pair of magnetic poles with opposite polarities to generate magnetic lines of force for cutting the rotor winding 40. The installation part 521 fixes the magnetic conduction piece 52, the two magnetic pole parts 522 can be independently attached to any opposite side of the rotor winding 40 on the rotation axis to form a magnetic gap, a magnetic field generated by the stator coil can be fully utilized, the position and the shape of the two magnetic pole parts 522 are favorable to be arranged, the width of the cavity 11 in the direction of the connecting line of the geometric centers of the two magnetic pole parts 522 is reduced, when the alternating-current brush motor is installed on a power assembly, the limitation of the volume of the stator coil in the width direction can be avoided, and therefore the spatial arrangement is optimized.

It should be particularly clarified that, when the ac brushed motor is installed in the power assembly, the installation portion 521 is used to locate and install the stator coil on one side (hereinafter referred to as the first side) of the rotor winding 40 along the radial direction of the rotation axis, and the magnetic field of the stator coil is guided to the pair of magnetic poles through the magnetic conductive member 52, so that the geometric center line of the two magnetic pole portions 522 can be far away from the stator coil on the first side, and thus the overall volume of the ac brushed motor after being connected to the power assembly can be reduced by installing the worm wheel of the power assembly on the first side, and the installation convenience is better.

Referring to fig. 2 to 4, in order to optimize the spatial arrangement of the ac brushed motor, in an alternative embodiment, the magnetic pole portion 522 includes an extension 5221 for coupling with the mounting portion 521, and a butt-joint 5222 for forming a magnetic pole near the rotor winding 40, the extension 5221 intersecting and being disposed perpendicular to the extension direction of the mounting portion 521. Here, the connection is magnetic conduction, and the mounting portion 521 and the extension 5221 may be integrally provided or may be separately provided, which will not be described in detail herein. The shape of the mounting portion 521 is not particularly limited, and the extension 5221 of each magnetic pole portion 522 is connected to the mounting portion 521, so that the abutting section 5222 can be arranged away from the first side where the mounting portion 521 is located, taking the rotation axis as a dot, any abutting section 5222 can cross the output shaft 30 along the circumferential direction of the output shaft 30 and be located on the second side, and the geometric centers of the two abutting sections 5222 can form a line as a magnetic gap with a pair of magnetic poles with opposite polarities. The extension portions 5221 intersect and are perpendicular to the extension direction of the mounting portion 521, which is beneficial to keep the magnetic gap away from the stator coil and better achieve the purpose of space utilization.

With continued reference to fig. 2 to 4, in order to further optimize the spatial arrangement of the ac brushed motor, so that the ac brushed motor can be stably mounted on the bracket body 10 and be convenient for maintenance, in an alternative embodiment, the bracket body 10 includes a configuration plate 12 for forming a sidewall of the cavity 11, and notches 13 adjacent to both sides of the configuration plate 12, the configuration plate 12 is disposed corresponding to the mounting portions 521 of the magnetic conductive members 52, so that the stator winding 50 is fixed on a side of the bracket body 10 facing away from the cavity 11, and the notches 13 are used for abdicating the magnetic pole portions 522 of the magnetic conductive members 52, so that the docking sections 5222 can extend into the cavity 11. In the present embodiment, the inner side of the bridging plate 12 is used for forming the sidewall of the cavity 11, and the outer side of the bridging plate 12 is used for installing the magnetic conduction member 52, so as to facilitate the dismounting and mounting of the stator winding 50. The notches 13 on the two sides may be through holes or yielding spaces, and the notches 13 provide for the magnetic pole portions 522 of the magnetic conductive member 52 to yield, so that the docking section 5222 can extend into the cavity 11, and the magnetic fields of the pair of magnetic poles can be protected from being blocked by the bracket body 10, thereby reducing the influence of magnetic loss, which is not described in detail herein.

With continued reference to fig. 2-4, to further reduce the effects of magnetic losses, in an alternative embodiment, the docking section 5222 is in the shape of a sector ring, the inner side of the sector ring of the docking section 5222 is adapted to the outer diameter of the rotor winding 40, and the inner side of the sector ring is disposed at a circumferential angle less than or equal to 180 degrees. The fitting mainly means that the projection shape and the axial width are set so that the magnetic field has a better utilization rate, the inner side surface of the fan ring can better cover the rotor winding 40, it should be described in detail that the circumferential angle of the inner side of the fan ring is set to be less than or equal to 180 degrees, and may be 60 degrees, 90 degrees or 180 degrees, and the like, and when the angle is smaller, a larger magnetic field strength can be obtained by setting a plurality of pairs of magnetic poles, which is not described in detail herein.

With continued reference to fig. 2-4, in view of ease of manufacturing the ac brushed motor, in an alternative implementation, the ac brushed motor further includes a brush 60 and a commutator 70 electrically connected to the rotor winding 40, the commutator 70 is mounted on the output shaft 30, the bracket body 10 further includes a second configuration plate 14 connected to the configuration plate 12, the second configuration plate 14 and the configuration plate 12 form a second cavity 15 for receiving the commutator 70, and the second configuration plate 14 is used for mounting the brush 60 so that the brush 60 can abut against the commutator 70 to generate an electrical connection. The commutator 70 may be fixed to the output shaft 30 by a key shaft mounting method, the second configuration plate 14 may be integrally formed with the configuration plate 12 by a processing method such as sheet metal press forming, and the second configuration plate 14 may be connected to the configuration plate 12 by a processing method such as welding, which will not be described in detail herein. The second cavity 15 can be used to house the commutator 70 for protection. The second cavity 15 may be in communication with the cavity 11 or separate from the cavity 11, and will not be described in detail herein. The second coupling plate 14 may be provided with a mounting groove (not shown) or the like for mounting the brush 60 corresponding to the commutator 70, thereby facilitating the mounting of the ac brush motor.

With continued reference to fig. 2-4, to facilitate mounting of the ac brushed motor, in an alternative embodiment, the stator winding 50 further includes an insulator body 53, the mounting portion 521 extends cylindrically, the insulator body 53 defines a mounting hole 531 adapted to an outer cylindrical surface of the mounting portion 521, and the insulator body 53 is fixed to the mounting portion 521 through the mounting hole 531. The insulator body 53 is a component made of known insulating materials, such as a plastic ring. Installation department 521 can be cylindric extension, prismatic extension or irregular shape extension etc. and mounting hole 531 is used for with installation department 521 outer cylinder shape adaptation, indicates that mounting hole 531 can pass through the connecting piece with installation department 521 close-fitting or installation department 521 and fix in mounting hole 531, and skilled person in the art can pass through the utility model discloses embodiment and drawing obtain corresponding technical means, and it is unnecessary here to describe repeatedly. In a preferred embodiment, the insulator 53 includes a first concave portion 532 and a second concave portion 533, the open end of the first concave portion 532 is provided with a positioning groove 5321, the open end of the second concave portion 533 is provided with a protrusion 5331, and the protrusion 5331 is tightly fitted with the positioning groove 5321, so that the first concave portion 532 and the second concave portion 533 form a rectangular-shaped portion with a mounting hole 531. The tight fit may be interference fit or riveting, so that the open end of the first concave portion 532 can be firmly fixed to the open end of the second concave portion 533 to form a square-shaped portion, the square-shaped portion forms the mounting hole 531, and the mounting portion 521 extends in a square column shape to prevent the insulator body 53 from rotating around the mounting portion 521. In a preferred embodiment, in order to facilitate winding of the stator coil, the insulator body 53 is provided with a plurality of spaced apart tabs 534 protruding outward in the radial direction of the rotation axis, a winding slot 535 for partially accommodating the stator coil is formed between two adjacent tabs 534, and a connection terminal 536 is provided on any one tab 534 for facilitating connection.

The utility model discloses it has brush motor power assembly to exchange still to provide one kind, it is shown with reference to fig. 1 to fig. 4, it has brush motor power assembly to exchange to include worm 80 and gear box 90 to and aforementioned exchange has brush motor, and the one end of output shaft 30 is passed the bearing spare and is set up for be connected through worm 80 and gear box 90 transmission, gear (not shown in the figure) addendum circle part with worm 80 meshing in the gear box 90 lies in the place side setting that constructs fishplate bar 12. When the ac brushed motor is installed in the power assembly, the installation portion 521 is used to position and install the stator coil on the first side where the structural connection plate 12 is located, and the magnetic field of the stator coil is guided to the pair of magnetic poles through the magnetic conductive member 52, so that the geometric center connecting line of the two magnetic pole portions 522 can be far away from the stator coil located on the first side, and therefore the gear of the gear box 90 can be arranged on the first side, the overall volume of the ac motor after the ac motor is connected to the power assembly is reduced, and the installation convenience is better.

With continued reference to fig. 1 to 4, in order to facilitate manufacturing of the brush motor power assembly, in an alternative embodiment, the bracket body 10 further includes a partition plate 16 connected to the structural plate 12, the partition plate 16 is used to form a bearing seat for mounting a bearing member in the second cavity 15, the gear box 90 includes a box 92 having an opening 91 and a cover 93 capable of closing the opening 91, the box 92 is integrally provided with the bracket body 10, and the other end of the output shaft 30 is provided with a second mounting portion 31 for mounting a fan (not shown). The box 92 is open, so that the rotor winding 40, the bearing piece and the output shaft 30 can be conveniently installed, and the cover 93 can close the opening 91 to form the gear box 90 for accommodating the gear, so that the box 92 can be conveniently obtained through casting, injection molding and other forming modes.

It is to be understood that the invention is not limited to the above-described embodiments, and that modifications and variations may be made by those skilled in the art in light of the above teachings, and all such modifications and variations are intended to be included within the scope of the invention as defined in the appended claims.

Claims (10)

1. The utility model provides an exchange brush motor, includes support body, bearing spare, output shaft and rotor winding, the output shaft passes through the bearing spare can rotate around its gyration axle center and set up on the support body, rotor winding fixes on the output shaft, the support body encloses to close and forms and is used for accomodating rotor winding's cavity, its characterized in that, it still includes to exchange brush motor:

stator winding, include stator coil and fix magnetic conduction spare on the support body, magnetic conduction spare includes the installation department, and respectively with the magnetic pole portion that two intervals that the installation department links to each other set up, stator coil is in the surface of installation department is around putting, and with the installation department is insulating continuous, the installation department is used for making stator coil location is installed rotor winding follows the radial one side in gyration axle center, stator coil is used for exciting two magnetic pole portions, so that two magnetic pole portion can form a pair of magnetic pole opposite in polarity and supply rotor winding cuts the magnetic gap of magnetic line of force.

2. An ac brushed electric motor according to claim 1, wherein the pole portions comprise extension sections for connection to the mounting portions and butt-joint sections for proximity to the rotor windings to form poles, the extension sections intersecting and being disposed perpendicular to the direction of extension of the mounting portions.

3. An AC brush motor according to claim 2, wherein the bracket body includes a connection plate for forming the side wall of the cavity, and notches adjacent to both sides of the connection plate, the connection plate corresponds to the installation portion of the magnetic conductive member, so that the stator winding is fixed to the bracket body back to one side of the cavity, and the notches provide the magnetic pole portions of the magnetic conductive member to be shifted, so that the docking section can extend into the cavity.

4. An ac brushed electrical machine according to claim 3 wherein the docking station is in the form of a sector ring, the inner side of the sector ring of the docking station is adapted to the outer diameter of the rotor winding, and the circumferential angle of the inner side of the sector ring is less than or equal to 180 degrees.

5. An ac brushed electric motor as claimed in claim 3, further comprising a brush and a commutator electrically connected to the rotor winding, the commutator being mounted on the output shaft, the bracket body further comprising a second catch plate connected to the catch plate, the second catch plate and the catch plate forming a second cavity for receiving the commutator, the second catch plate being configured to mount the brush so that the brush can be abutted against the commutator to make electrical connection.

6. An AC brushed motor as claimed in claim 5 wherein the stator winding further comprises an insulator body, the mounting portion is cylindrically extended, the insulator body defines a mounting hole adapted to the outer cylindrical surface of the mounting portion, and the insulator body is secured to the mounting portion via the mounting hole.

7. An AC brushed motor according to claim 6, wherein the insulator body comprises a first female portion and a second female portion, the first female portion having a detent at an open end and the second female portion having a protrusion at an open end, the protrusion fitting tightly into the detent to form a loop portion with the mounting hole.

8. The ac brushed electric motor of claim 6, wherein a plurality of spaced tabs are protruded from the insulator body toward an outer side of the radial direction of the rotation axis, a winding slot for partially accommodating the stator coil is formed between two adjacent tabs, and a terminal is provided on any one of the tabs.

9. An alternating current brush motor power assembly, comprising: a worm and a gear box, and an ac brushed motor according to any one of claims 5 to 8, wherein one end of the output shaft is disposed through the bearing member for driving connection with the gear box through the worm, and a gear addendum circle portion in the gear box engaged with the worm is disposed at a side of the bridge plate.

10. An ac brushed motor drive assembly according to claim 9, wherein the bracket body further comprises a divider plate connected to the bridge plate, the divider plate is used to form a bearing seat for mounting the bearing member in the second cavity, the gear box comprises a box body having an opening and a cover body capable of closing the opening, the box body is integrally disposed with the bracket body, and a second mounting portion for mounting a fan is disposed at the other end of the output shaft.

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