CN214256086U

CN214256086U - Series excited machine

Info

Publication number: CN214256086U
Application number: CN202120284661.7U
Authority: CN
Inventors: 梁居勇
Original assignee: Zhongshan Zhihe Motor Electrical Appliance Co ltd
Current assignee: Zhongshan Zhihe Motor Electrical Appliance Co ltd
Priority date: 2021-02-01
Filing date: 2021-02-01
Publication date: 2021-09-21
Anticipated expiration: 2031-02-01

Abstract

The utility model discloses a series excited machine, which comprises a rotating shaft, a rotor core and a stator component, wherein the rotor core and the rotating shaft are coaxially arranged and fixed on the rotating shaft; stator module includes stator core and establishes the stator winding on stator core, and stator core is fixed to be set up, and the pivot is rotated with stator core and is connected, and stator winding is equipped with a plurality ofly and is the interval setting, and stator winding corresponds the setting with rotor core. This series machine, rotor core fix in the pivot, are equipped with a plurality of stator windings on the stator core, and when starting, the relative stator core of rotor core rotates to drive the pivot and rotate, compare the two poles of the earth series machine that the tradition only has two stator windings, a plurality of stator windings can export higher moment of torsion, satisfy the operational requirement of heavy load, guarantee the normal working life of series machine.

Description

Series excited machine

Technical Field

The utility model relates to a motor technical field especially relates to a series excited machine.

Background

The series Motor is commonly called a series Motor or a Universal Motor (Universal Motor), and is named because an armature winding and a field winding are connected in series to work. The single-phase series excited motor belongs to an AC and DC dual-purpose motor, and can work by using an AC power supply and can also work by using a DC power supply.

However, when the series motor is used, the actual torque of the series motor is not always enough, which results in that the torque force of the series motor is insufficient during the operation process and the series motor is in an overload state for a long time, thereby affecting the service life of the series motor.

SUMMERY OF THE UTILITY MODEL

Based on this, there is a need to provide a series excited machine; the load capacity of the series excited motor is higher than that of the traditional series excited motor, and larger torque can be provided, so that the actual requirement is met, and the normal working life is ensured.

The technical scheme is as follows:

one embodiment provides a series excited machine including:

a rotating shaft;

the rotor iron core is coaxially arranged with the rotating shaft and is fixed on the rotating shaft; and

stator module, stator module includes stator core and establishes stator winding on the stator core, stator core is fixed to be set up, the pivot with stator core rotates to be connected, stator winding is equipped with a plurality ofly and is the interval setting, just stator winding with rotor core corresponds the setting.

Above-mentioned series excited machine, rotor core fix in the pivot, are equipped with a plurality of stator windings on the stator core, and when starting, the relative stator core of rotor core rotates to drive the pivot and rotate, compare the two poles of the earth series excited machine that the tradition only has two stator windings, a plurality of stator windings can export higher moment of torsion, satisfy the operational requirement of heavy load, guarantee series excited machine's normal working life.

The technical solution is further explained below:

in one embodiment, the stator assembly further comprises a first bobbin and a second bobbin, the first bobbin and the second bobbin are respectively fixed at two opposite ends of the stator core;

the first line frame is provided with a plurality of first through holes which are arranged at intervals;

the second wire frame is provided with a plurality of second through holes, and the second through holes correspond to the first through holes one to one;

the stator core is provided with a plurality of third through holes, and the third through holes correspond to the first through holes one to one;

the first through hole, the second through hole and the third through hole enable the stator core, the first bobbin and the second bobbin to form a plurality of winding structures, and the winding structures correspond to the stator windings in a one-to-one mode.

In one embodiment, the first wire frame is annularly arranged, and four first through holes are formed in the first through hole and are uniformly distributed on the periphery of the first wire frame; the second wire frame is annularly arranged, and four second through holes are formed in the second through hole and are uniformly distributed on the periphery of the second wire frame; the stator core is annularly arranged, four third through holes are formed in the periphery of the stator core and are uniformly distributed on the periphery of the stator core, and the rotor core is located in the ring of the stator core;

the first wire frame is provided with a first wire blocking plate which is arranged in a protruding mode towards the direction far away from the stator core; the first wire blocking plates are four and are uniformly distributed at the inner side end of the first wire frame, and the first wire blocking plates correspond to the positions between two adjacent first through holes;

the second wire frame is provided with a second wire retaining plate which is arranged in a protruding mode towards the direction far away from the stator iron core; the second thread blocking plates are four and are uniformly distributed at the inner side end of the second thread stand, and the second thread blocking plates correspond to the positions between the two adjacent second through holes.

In one embodiment, the series excited machine further comprises a first bracket and a second bracket, wherein the first bracket and the second bracket are respectively fixed at two opposite ends of the stator core;

the series excitation motor further comprises a first bearing and a second bearing, the first bearing and the second bearing are arranged at intervals in the rotating shaft, a first mounting through hole is formed in the first support, the first bearing is installed on the first support through the first mounting through hole, a second mounting through hole is formed in the second support, and the second bearing is installed on the second support through the second mounting through hole.

In one embodiment, the series excited machine further comprises a plurality of brush assemblies and a commutator, the brush assemblies are arranged on the first support at intervals, the commutator is sleeved on the rotating shaft, the commutator is located between the first support and the rotor core, and the brush assemblies surround the periphery of the commutator.

In one embodiment, the brush assembly comprises a brush box, a brush head, a spring and a blocking piece, the brush box is fixed on the first support and is provided with a first through cavity, the spring is located in the first through cavity, one end of the brush head is abutted to the commutator, the other end of the brush head is connected with one end of the spring, the other end of the spring is connected with the blocking piece, and the blocking piece is fixed with the brush box.

In one embodiment, the brush assembly further comprises a supporting sleeve capable of conducting heat, the supporting sleeve is sleeved in the brush box through the first through cavity, the supporting sleeve is provided with a second through cavity, and the brush head can move in the second through cavity.

In one embodiment, a first fixing block and a second fixing block are respectively arranged on two opposite sides of the brush box, the first bracket is provided with a mounting groove, two side walls of the mounting groove are respectively provided with a first step groove and a second step groove, the first step groove corresponds to the first fixing block, the second step groove corresponds to the second fixing block, the first fixing block is fixed on the first bracket through the first step groove, and the second fixing block is fixed on the second bracket through the second step groove;

the brush box is equipped with first fluting, first fluting with first logical chamber communicates with each other, the support cover is equipped with the second fluting, the second fluting with the second communicates with each other in the chamber, just the second fluting with first fluting corresponds and offers, the brush subassembly still includes the copper inserted sheet, the one end of copper inserted sheet is passed through first fluting with the second fluting stretches into in the second logical chamber, the separation blade is located in the second logical chamber and with copper inserted sheet butt.

In one embodiment, the stator core is provided with limiting through holes, the limiting through holes are provided with at least two spacing holes and are arranged at intervals, the first bracket is provided with a first limiting column, the first limiting column is arranged corresponding to the limiting through holes, the first limiting column is arranged at one end, facing the stator core, of the first bracket, the second bracket is provided with a second limiting column, the second limiting column is arranged corresponding to the limiting through holes, and the second limiting column is arranged at one end, facing the stator core, of the second bracket;

the series excitation motor further comprises a plurality of first fixing screws, and the first fixing screws are used for fixing the first support and the second support at two opposite ends of the stator core respectively;

the series excitation motor comprises a first support and a second support, wherein the first support is provided with a plurality of supporting arms, the supporting arms are arranged at the periphery of the first support at intervals, the supporting arms are provided with third installation through holes, the series excitation motor further comprises a shock pad, the shock pad is provided with a plurality of shock pads in one-to-one correspondence with the supporting arms, and the shock pad is installed on the corresponding supporting arms through the third installation through holes.

In one embodiment, the series motor further includes a fan housing and a fan blade, the fan housing is fixed to the first bracket or the fan housing is fixed to the stator core, the first bracket is located in the fan housing, the fan housing is provided with an air outlet, the air outlet is located on one side, away from the first bracket, of the fan housing, and the fan blade is fixed to the end of the rotating shaft and located on the outer side of the fan housing.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification.

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Furthermore, the drawings are not drawn to a 1:1 scale, and the relative sizes of the various elements in the drawings are drawn only by way of example, and not necessarily to true scale.

Fig. 1 is a schematic view of the overall structure of a series excited motor in one embodiment;

fig. 2 is an exploded view of the overall structure of the series excited motor in the embodiment of fig. 1;

FIG. 3 is an assembly view of the stator core, the first bobbin, the second bobbin, the first bracket and the brush assembly of the embodiment of FIG. 1;

FIG. 4 is an assembly view of the stator core, the rotor core, the first bobbin and the second bobbin of the embodiment of FIG. 1;

FIG. 5 is a schematic view of the overall structure of the first bracket in the embodiment of FIG. 1;

FIG. 6 is a schematic view of the assembly of the first holder and brush assembly of the embodiment of FIG. 1;

FIG. 7 is a schematic view showing the overall structure of the second bracket in the embodiment of FIG. 1;

FIG. 8 is a schematic view of the assembly of the stator core and rotor core of the embodiment of FIG. 1;

fig. 9 is an exploded view of the overall structure of the brush assembly in the embodiment of fig. 1.

Reference is made to the accompanying drawings in which:

110. a rotating shaft; 121. a first bearing; 122. a second bearing; 130. a commutator; 200. a rotor core; 310. a stator core; 311. a third through hole; 312. a limiting through hole; 320. a first wire frame; 321. a first through hole; 322. a first thread-blocking plate; 330. a second wire frame; 331. a second through hole; 332. a second thread retaining plate; 410. a first bracket; 411. a first mounting through hole; 4121. mounting grooves; 4122. a first step groove; 4123. a second stepped groove; 413. a first limit post; 420. a second bracket; 421. a second mounting through hole; 422. a second limit post; 423. a support arm; 4231. a third mounting through hole; 430. a first set screw; 440. a crash pad; 500. an electric brush assembly; 510. an electric brush box; 511. a first fixed block; 512. a second fixed block; the first open slot; 514. a first through cavity; 520. an electric brush head; 530. a spring; 540. a baffle plate; 550. A support sleeve; 551. a second slot; 552. a second through cavity; 610. a fan housing; 611. an air outlet; 620. a fan blade; 630. and a second set screw.

Detailed Description

The embodiments of the present invention will be described in detail below with reference to the accompanying drawings:

in order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.

Referring to fig. 1 and 2, one embodiment provides a series excited motor including a rotating shaft 110, a rotor core 200, and a stator assembly. Wherein:

the rotation shaft 110 can be rotated by the rotor core 200 and outputs a torque.

The rotor core 200 is coaxially disposed with the rotation shaft 110 and fixed to the rotation shaft 110.

As shown in fig. 2, the rotor core 200 is substantially sleeved at the middle position of the rotating shaft 110, and two sides of the rotor core 200 are respectively provided with an insulating end plate.

Rotor winding is arranged on rotor core 200 in a winding mode, and during operation, stator winding and rotor winding interact with each other, so that rotor core 200 rotates relative to stator core 310, rotor core 200 rotates, and rotating shaft 110 is driven to rotate.

In one embodiment, the stator assembly includes a stator core 310 and a stator winding disposed on the stator core 310, the stator core 310 is fixedly disposed, the rotating shaft 110 is rotatably connected to the stator core 310, the stator winding is disposed in a plurality and spaced apart from each other, and the stator winding is disposed corresponding to the rotor core 200.

This series excited machine, rotor core 200 are fixed on pivot 110, are equipped with a plurality of stator winding on stator core 310, and when starting, rotor core 200 relative stator core 310 rotates to drive pivot 110 and rotate, compare the two poles of the earth series excited machine that the tradition only had two stator winding, a plurality of stator winding can export higher moment of torsion, satisfy the operational requirement of heavy load, guarantee series excited machine's normal working life.

In one embodiment, referring to fig. 2 to 4, the stator assembly further includes a first bobbin 320 and a second bobbin 330, and the first bobbin 320 and the second bobbin 330 are respectively fixed at opposite ends of the stator core 310.

Referring to fig. 4, the first bobbin 320 has a plurality of first through holes 321, and the first through holes 321 are spaced apart from each other.

Referring to fig. 4, the second bobbin 330 has a plurality of second through holes 331, and the second through holes 331 correspond to the first through holes 321 one by one.

Referring to fig. 4, the stator core 310 has a plurality of third through holes 311, and the third through holes 311 correspond to the first through holes 321 one by one.

Referring to fig. 2 to 4, the first through hole 321, the second through hole 331 and the third through hole 311 form a plurality of winding structures on the stator core 310, the first bobbin 320 and the second bobbin 330, and the winding structures correspond to the stator windings one to one.

After the first bobbin 320, the stator core 310 and the second bobbin 330 are fixed together, since the first through hole 321, the third through hole 311 and the second through hole 331 are all in one-to-one correspondence, which is equivalent to forming a large through hole penetrating through the first bobbin 320, the stator core 310 and the second bobbin 330, and the adjacent through holes are of an entity structure, the entity structure forms a winding structure, and the stator winding can pass through the large through hole and is wound on the winding structure, which is not described again.

In one embodiment, referring to fig. 4, the first bobbin 320 is annularly disposed, and four first through holes 321 are disposed and uniformly distributed on the outer circumference of the first bobbin 320. The second bobbin 330 is disposed in a ring shape, and four second through holes 331 are disposed and uniformly distributed on the outer circumference of the second bobbin 330. Stator core 310 is annularly arranged, four third through holes 311 are uniformly distributed on the periphery of stator core 310, and rotor core 200 is located in the ring of stator core 310.

Correspondingly, the stator winding is provided with four parallel windings and is arranged on four corresponding winding structures, the four stator windings are uniformly distributed on the stator core 310, a four-stage series motor is formed, and compared with a traditional two-pole series motor, the output torque is doubled.

In one embodiment, referring to fig. 4, the first bobbin 320 has a first baffle 322, and the first baffle 322 protrudes away from the stator core 310.

In order to facilitate accurate winding of the stator winding, the first wire baffle plate 322 is used for limiting the winding of the stator winding, and the winding deflection is avoided.

Further, referring to fig. 4, four first line blocking plates 322 are uniformly distributed at the inner side end of the first bobbin 320, and the first line blocking plates 322 correspond to two adjacent first through holes 321.

In one embodiment, referring to fig. 4, the second bobbin 330 has a second thread stop 332, and the second thread stop 332 protrudes in a direction away from the stator core 310.

Further, referring to fig. 4, four second line blocking plates 332 are disposed and uniformly distributed at the inner side end of the second line frame 330, and the second line blocking plates 332 correspond to two adjacent second through holes 331.

The arrangement of the second thread blocking plate 332 on the first thread blocking plate 322 is the same, and the description thereof is omitted.

In one embodiment, referring to fig. 2 and 3, the series motor further includes a first bracket 410 and a second bracket 420, and the first bracket 410 and the second bracket 420 are respectively fixed to opposite ends of the stator core 310.

In one embodiment, referring to fig. 2, the series motor further includes a first bearing 121 and a second bearing 122, the first bearing 121 and the second bearing 122 are disposed on the rotating shaft 110 at intervals, the first bracket 410 is provided with a first mounting through hole 411, the first bearing 121 is mounted on the first bracket 410 through the first mounting through hole 411, the second bracket 420 is provided with a second mounting through hole 421, and the second bearing 122 is mounted on the second bracket 420 through the second mounting through hole 421.

The first bearing 121 and the second bearing 122 are arranged to realize the mounting and supporting of the rotating shaft 110 on one hand and to realize the rotating connection of the rotating shaft 110 with the first bracket 410 and the second bracket 420 on the other hand.

In one embodiment, referring to fig. 2, the series excited motor further includes a plurality of brush assemblies 500 and a commutator 130, the brush assemblies 500 are disposed on the first support 410 at intervals, the commutator 130 is sleeved on the rotating shaft, the commutator 130 is disposed between the first support 410 and the rotor core 200, and the brush assemblies 500 surround the outer circumference of the commutator 130.

As shown in fig. 2, four brush assemblies 500 are provided, four brush assemblies 500 are uniformly distributed on the periphery of the commutator 130, the brush assemblies 500 are used for realizing conduction of stator windings and rotor windings, and the four brush assemblies 500 correspond to the four stator windings to provide larger torque output.

Meanwhile, compared with the conventional method in which only two brush assemblies 500 are provided, the arrangement of the plurality of brush assemblies 500 reduces the wear borne by each brush assembly 500, thereby improving the service life of a single brush assembly 500 without frequently replacing the brush assemblies 500.

In one embodiment, referring to fig. 2 and 9, the brush assembly 500 includes a brush box 510, a brush head 520, a spring 530, and a catch 540, the brush box 510 is fixed to the first bracket 410 and is provided with a first through cavity 514, the spring 530 is located in the first through cavity 514, one end of the brush head 520 abuts against the commutator 130, the other end of the brush head 520 is connected to one end of the spring 530, the other end of the spring 530 is connected to the catch 540, and the catch 540 is fixed to the brush box 510.

One end of the spring 530 is abutted by the stopper 540, and the other end of the spring 530 abuts against the brush head 520, so that the brush head 520 is always abutted against the commutator 130, which is not described again.

Optionally, the brush box 510 is a bakelite brush box.

In one embodiment, one end of the brush head 520 is provided with an abutment portion, which is disposed in an angled surface.

Optionally, the abutting portion of the brush head 520 has a plurality of step structures distributed in a staggered manner to form an inclined surface, so that the service life of the brush head 520 is prolonged compared to a straight plane abutting against the commutator 130.

In one embodiment, referring to fig. 9, the brush assembly 500 further includes a supporting sleeve 550 capable of conducting heat, the supporting sleeve 550 is disposed in the brush box 510 through the first through cavity 514, the supporting sleeve 550 is provided with a second through cavity 552, and the brush head 520 is capable of moving in the second through cavity 552.

In the working process of the series motor, the commutator 130 rotates at a high speed, which inevitably causes the brush head 520 to generate a large amount of heat in the abrasion process, and the brush box 510 is usually made of plastic materials, so that the brush box 510 is easily heated and deformed to affect the limiting effect on the protection of the brush head 520 and the like under the condition that the brush head 520 generates heat. In order to avoid the problem that the brush box 510 is deformed due to heat generated by the brush head 520, a supporting sleeve 550 is arranged between the brush head 520 and the brush box 510, and the supporting sleeve 550 is made of a rigid conductive material, so that on one hand, a certain amount of heat can be absorbed due to heat conduction to reduce the amount of heat conducted to the brush box 510, and on the other hand, the supporting sleeve 550 plays a role in keeping the shape of the brush box 510 to prevent the brush box 510 from being deformed due to overheating.

Optionally, the material of the support sleeve 550 is copper, which has excellent electrical and thermal conductivity.

In one embodiment, referring to fig. 5 and 9, the brush box 510 is provided with a first fixing block 511 and a second fixing block 512 at opposite sides thereof, the first bracket 410 is provided with a mounting groove 4121, two sidewalls of the mounting groove 4121 are respectively provided with a first step groove 4122 and a second step groove 4123, the first step groove 4122 corresponds to the first fixing block 511, the second step groove 4123 corresponds to the second fixing block 512, the first fixing block 511 is fixed to the first bracket 410 through the first step groove 4122, and the second fixing block 512 is fixed to the second bracket 420 through the second step groove 4123.

Optionally, the first fixing block 511 and the second fixing block 512 are fixed on the first bracket 410 by means of screw fixation; or the first fixing block 511 and the second fixing block 512 are fixed on the first bracket 410 by means of adhesion, which is not described in detail.

In one embodiment, referring to fig. 5 and 6, the brush assembly 500 is non-orthogonally abutted against the commutator 130. With the arrangement, sparks can be smaller, and the performance is more reliable.

Alternatively, as shown in fig. 5 and 6, the brush assembly 500 is provided with four mounting grooves 4121, which are arranged in four and correspond to the brush assembly 500 one by one, and the four mounting grooves 4121 are distributed outside the first mounting through hole 411 but do not orthogonally correspond to the first mounting through hole 411, so that the mounted brush assembly 500 is non-orthogonally abutted against the commutator 130.

Alternatively, any two adjacent mounting grooves 4121 are arranged vertically, and the diagonally positioned mounting grooves 4121 are offset. The arrangement is such that the four brush assemblies 500 are mounted on the first carrier 410 and then non-orthogonally abutted against the commutator 130, as shown in figure 6.

In the embodiment shown in fig. 6, four brush assemblies 500 are arranged at four positions, i.e., left, right, up and down, so that the left and right brush assemblies 500 are horizontally arranged and vertically staggered, and the upper and lower brush assemblies 500 are longitudinally arranged and horizontally staggered.

In the embodiment shown in fig. 6, the deflection angle may be between-22.5 degrees and 15 degrees, which corresponds to the brush assembly 500 being deflected relative to the outer circumference of the commutator 130, as compared to an arrangement in which the brush assembly 500 is in orthogonal abutment with the commutator 130.

In one embodiment, referring to fig. 9, the brush box 510 has a first slot, the first slot communicates with the first through cavity 514, the support sleeve 550 has a second slot 551, the second slot 551 communicates with the second through cavity 552, the second slot 551 and the first slot are correspondingly formed, the brush assembly 500 further includes a copper insert, one end of the copper insert extends into the second through cavity 552 through the first slot 551 and the second slot 551, and the stop 540 is located in the second through cavity 552 and abuts against the copper insert.

The copper insert is inserted into the second through cavity 552 through the first slot and further through the second slot 551, so that the baffle 540 abuts against the copper insert, and the copper insert is electrically connected with the corresponding stator winding, so that the stator winding and the rotor winding are connected.

In one embodiment, referring to fig. 8, the stator core 310 has a limiting through hole 312, at least two limiting through holes 312 are disposed at intervals, the first bracket 410 has a first limiting pillar 413, the first limiting pillar 413 is disposed corresponding to the limiting through hole 312, the first limiting pillar 413 is disposed at an end of the first bracket 410 facing the stator core 310, the second bracket 420 has a second limiting pillar 422, the second limiting pillar 422 is disposed corresponding to the limiting through hole 312, and the second limiting pillar 422 is disposed at an end of the second bracket 420 facing the stator core 310.

Through the matching of the first limiting column 413 and the limiting through hole 312, the first support 410 is in limiting matching with the stator core 310, and even if vibration and the like occur, the structural precision can be ensured; similarly, through the cooperation of the second spacing post 422 and the spacing through-hole 312, the spacing cooperation of second support 420 and stator core 310 guarantees the structure precision on the one hand, and on the other hand also can reduce because the collision leads to the concentricity of stator core 310 and first support 410 and second support 420, no longer describes repeatedly.

The first limiting column 413, the second limiting column 422 and the limiting through hole 312 are correspondingly provided in a plurality. As shown in fig. 6 and 8, the number of the limiting through holes 312 is eight, and correspondingly, the number of the first limiting columns 413 and the number of the second limiting columns 422 are eight.

In one embodiment, referring to fig. 2, the series motor further includes a plurality of first fixing screws 430, and the first fixing screws 430 are used to fix the first bracket 410 and the second bracket 420 to opposite ends of the stator core 310.

Specifically, in the embodiment shown in fig. 2, four first fixing bolts 430 are provided, and are uniformly distributed at intervals on the circumference of the stator core 310.

In one embodiment, referring to fig. 1, 2 and 7, the second bracket 420 is provided with a plurality of supporting arms 423, the plurality of supporting arms 423 are spaced apart from each other and disposed on the outer periphery of the second bracket 420, the plurality of supporting arms 423 are provided with third mounting through holes 4231, the series motor further includes a vibration-proof pad 440, the plurality of vibration-proof pads 440 are disposed in one-to-one correspondence with the plurality of supporting arms 423, and the vibration-proof pad 440 is mounted on the corresponding supporting arm 423 through the third mounting through hole 4231.

The vibration-proof pad 440 is made of a flexible material, and when the series motor works, the generated vibration can be weakened or reduced through the vibration-proof pad 440, so that the stable operation of the structure is ensured.

Alternatively, as shown in fig. 7, the supporting arms 423 are provided with four and uniformly distributed on the outer circumference of the second bracket 420, and correspondingly, as shown in fig. 2, the crash pads 440 are provided with four and correspond to the supporting arms 423 in a one-to-one manner.

In an embodiment, referring to fig. 1 and fig. 2, the series motor further includes a fan housing 610 and a fan blade 620, the fan housing 610 is fixed to the first bracket 410 or the fan housing 610 is fixed to the stator core 310, the first bracket 410 is located in the fan housing 610, the fan housing 610 is provided with an air outlet 611, the air outlet 611 is located on a side of the fan housing 610 away from the first bracket 410, and the fan blade 620 is fixed to an end of the rotating shaft 110 and located outside the fan housing 610.

The fan housing 610 may be fixed to the first bracket 410 by four second fixing screws 630, the fan blade 620 is fixed to the end of the rotating shaft 110 and located outside the fan housing 610, when the rotating shaft 110 rotates, the rotating shaft 110 drives the fan blade 620 to rotate, so as to form an air flow, and the air flow flows out of the fan housing 610 from inside of the fan housing 610 through the air outlet 611, so as to take away heat generated during operation of the series motor, thereby achieving a heat dissipation effect.

Further, referring to fig. 1, the fan 620 is circular, the radius of the fan 620 is greater than the radius of the air outlet 611, and a gap is formed between the fan 620 and the fan housing 610.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A series excited machine, comprising:

a rotating shaft;

2. The series excited machine of claim 1, wherein the stator assembly further comprises a first bobbin and a second bobbin, the first bobbin and the second bobbin being fixed to opposite ends of the stator core, respectively;

3. The series excited machine of claim 2, wherein the first bobbin is annularly arranged, and four first through holes are formed in the first through hole and are uniformly distributed on the periphery of the first bobbin; the second wire frame is annularly arranged, and four second through holes are formed in the second through hole and are uniformly distributed on the periphery of the second wire frame; the stator core is annularly arranged, four third through holes are formed in the periphery of the stator core and are uniformly distributed on the periphery of the stator core, and the rotor core is located in the ring of the stator core;

4. The series excited machine according to claim 1, further comprising a first bracket and a second bracket, the first bracket and the second bracket being fixed to opposite ends of the stator core, respectively;

5. The series excited machine according to claim 4, further comprising a plurality of brush assemblies and a commutator, wherein the brush assemblies are arranged on the first support at intervals, the commutator is sleeved on the rotating shaft, the commutator is located between the first support and the rotor core, and the brush assemblies surround the commutator.

6. The series excited machine according to claim 5, wherein the brush assembly comprises a brush box, a brush head, a spring and a blocking piece, the brush box is fixed on the first bracket and is provided with a first through cavity, the spring is located in the first through cavity, one end of the brush head is abutted to the commutator, the other end of the brush head is connected with one end of the spring, the other end of the spring is connected with the blocking piece, and the blocking piece is fixed with the brush box.

7. The series excited machine of claim 6, wherein the brush assembly further comprises a support sleeve capable of conducting heat, the support sleeve is sleeved in the brush box through the first through cavity, the support sleeve is provided with a second through cavity, and the brush head is capable of moving in the second through cavity.

8. The series excited machine according to claim 7, wherein a first fixing block and a second fixing block are respectively disposed on two opposite sides of the brush box, the first bracket is provided with a mounting groove, two side walls of the mounting groove are respectively provided with a first step groove and a second step groove, the first step groove corresponds to the first fixing block, the second step groove corresponds to the second fixing block, the first fixing block is fixed on the first bracket through the first step groove, and the second fixing block is fixed on the second bracket through the second step groove;

9. The series excited machine according to any one of claims 4 to 8, wherein the stator core is provided with limiting through holes, the limiting through holes are provided with at least two and are arranged at intervals, the first bracket is provided with a first limiting column, the first limiting column is arranged corresponding to the limiting through holes, the first limiting column is arranged at one end of the first bracket facing the stator core, the second bracket is provided with a second limiting column, the second limiting column is arranged corresponding to the limiting through holes, and the second limiting column is arranged at one end of the second bracket facing the stator core;

10. A series excited machine according to any one of claims 4 to 8, further comprising a fan housing and a fan blade, wherein the fan housing is fixed to the first bracket or the fan housing is fixed to the stator core, the first bracket is located in the fan housing, the fan housing is provided with an air outlet, the air outlet is located on one side of the fan housing away from the first bracket, and the fan blade is fixed to an end of the rotating shaft and located outside the fan housing.