An improved flat series motor

Abstract

The present invention discloses an improved flat series-excited motor, including a stator assembly, a rotor assembly, a motor front bracket and a motor rear bracket, wherein the stator assembly is provided with a stator core, the outer diameter d1 of the stator core is 100-200 mm, the thickness d2 of the stator core is 5-20 mm, and the inner diameter d3 of the stator core is 60-110 mm; the rotor assembly includes a rotor core, a commutator and a brush mounting plate, the brush mounting plate is provided with a plurality of brushes, the outer diameter d5 of the rotor core is 40-150 mm, the winding mode of each rotor enameled wire and the winding slot is set to 16 winding slots, and the number of cross-slots of the rotor enameled wire is 4. The present invention reduces the height of the series-excited motor to the greatest extent by improving the stator assembly, the rotor assembly and the mounting structure of the two, and when the various components of the series-excited motor are assembled, the distance between the motor front bracket and the motor rear bracket is ≤66 mm.

Description

Technical Field

[0001] The invention relates to the technical field of series-excited motors, and in particular to an improved flat series-excited motor. Background Art

[0002] The series-excited motor mainly includes a stator assembly and a rotor assembly.

[0003] The stator assembly includes the stator core, the stator enameled wire and the stator wire frame for winding the stator enameled wire. With the continuous development and progress of society, people's quality of life is constantly improving, and the requirements of the home appliance industry for motors are also constantly increasing. The development trend requires motors to be small in size, high in torque and high in speed. The size of the finished electrical appliances is also relatively small in space, with high torque and high speed. The traditional design of high-power motors for home appliances is the 98 series, 95 series and 88 series; when the motor power needs to reach more than 2000W, the stator core stack thickness needs to be more than 40mm. The manufacturing process of stator cores above 40mm is difficult and the defect rate is high.

[0004] The motor rotor part is a conversion device used by the series-excited motor to realize the conversion of electric energy into electric energy. The motor rotor part mainly includes a rotor core, a commutator and multiple groups of rotor enameled wires. A group of rotor enameled wires corresponds to a pair of magnetic poles of the motor stator part. The stator core of the traditional series-excited motor is 2-pole, and the outer diameter and bottom diameter of the rotor core are both small. The bottom diameter of the rotor core is generally 15-25mm, and the corresponding number of winding slots of the rotor core is generally 10 slots or 12 slots, that is, the corresponding number of slots across the rotor enameled wire is 5 slots or 6 slots. This winding process is full-distance winding, that is, the rotor enameled wire almost spans the entire outer diameter of the stator core, and the distance from the upper part of the commutator to the rotor core is far. Summary of the invention

[0005] In view of the shortcomings of the prior art, the purpose of the present invention is to provide an improved flat series-excited motor, which improves the stator assembly, the rotor assembly and the mounting structure of the two, so as to minimize the height of the series-excited motor. When the various components of the series-excited motor are assembled, the distance between the front bracket of the motor and the rear bracket of the motor is ≤66mm.

[0006] In order to achieve the above-mentioned purpose, the technical scheme adopted by the present invention is: an improved flat series-excited motor, comprising a stator assembly, a rotor assembly, a motor front bracket and a motor rear bracket, the motor front bracket and the motor rear bracket are arranged in a vertically matched manner, the stator assembly is arranged between the motor front bracket and the motor rear bracket, and the rotor assembly is rotatably matched with the stator assembly, characterized in that: the stator assembly is provided with a stator wire frame, a stator enameled wire wound on the stator wire frame, and a stator core installed on the stator wire frame;

[0007] The transverse cross section of the stator core is annular, the stator core is provided with at least four threading grooves, the four threading grooves are distributed in annular intervals, the center point of each threading groove forms an angle of 90° with the center point of the stator core, the outer diameter d1 of the stator core is 100-200 mm, the thickness d2 of the stator core is 5-20 mm, and the inner diameter d3 of the stator core is 60-110 mm;

[0008] The rotor assembly includes a rotor core, a commutator and a brush mounting plate which are arranged in sequence from top to bottom. The rear bracket of the motor is located below the brush mounting plate. The middle of the rotor core and the brush mounting plate are both formed with an axial hole for the commutator to pass through. The upper part of the commutator is passed through the axial hole of the rotor core, and the lower part of the commutator is passed through the axial hole of the brush mounting plate. The brush mounting plate is installed with a plurality of brushes distributed in an axial array, and each brush is respectively in friction contact with the commutator. At least four groups of rotor enameled wires are wound around the rotor core, and a plurality of winding grooves are opened on the outer edge of the rotor core. The number of brushes corresponds to the number of poles of the stator core.

[0009] The outer diameter d5 of the rotor core is 40-150 mm. Four groups of rotor enameled wires are respectively wound in corresponding winding grooves. The winding method of each rotor enameled wire and the winding groove is set to any one of the following structures:

[0010] 1) The number of winding slots is 16, and the number of slots across which the rotor enameled wire crosses is 4;

[0011] 2) The number of winding slots is 32, and the number of slots across which the rotor enameled wire crosses is 8;

[0012] 3) The number of winding slots is 64, and the number of slots across the rotor enameled wire is 16.

[0013] In a further technical solution, the stator wire frame is provided with an upper split frame and a lower split frame, the lower part of the upper split frame has an upper shielding part, the upper part of the lower split frame has a lower shielding part, the upper shielding part and the lower shielding part are arranged in conjunction with or inserted into each other to form an enameled wire insulation part, the outer edge of the enameled wire insulation part is provided with a core placement groove for accommodating the stator core, and the inner edge of the enameled wire insulation part is provided with a plurality of wire placement grooves for accommodating the stator enameled wire, and each wire placement groove is respectively arranged in conjunction with the corresponding wire threading groove up and down.

[0014] In a further technical solution, one of the upper shielding part and the lower shielding part is provided with a mating portion, and the other part has a mating slot at a position corresponding to the mating portion;

[0015] An upper wire stop block is arranged on the inner side of the upper split frame, and a lower wire stop block is arranged on the inner side of the lower split frame. The upper wire stop block and the lower wire stop block are arranged in abutment or inserted to form a wire stop portion, and the wire placement groove is formed between the wire stop portion and the enameled wire insulation portion;

[0016] The upper portion of the upper split frame extends outward to form an upper guide portion, and the upper portion of the lower split frame extends outward to form a lower guide portion, at least when the upper shielding portion and the lower shielding portion are matched or inserted, the core-setting groove is formed between the upper guide portion, the lower guide portion and the enameled wire insulation portion;

[0017] A winding portion is formed between two adjacent wire-arranging grooves, and the winding portion includes an upper winding portion formed on the upper split frame and a lower winding portion formed on the lower split frame;

[0018] The transverse section of the core-setting groove is "C" shaped;

[0019] The transverse cross section of the cable trough is "mouth" or "O" shaped;

[0020] The number of wiring ducts is 4, 6 or 8.

[0021] In a further technical solution, a terminal positioning portion is provided at a position of the stator wire rack corresponding to the wire groove, and the stator assembly is provided with a piercing terminal, the piercing terminal includes a male terminal and a female terminal, one end of the female terminal is electrically connected to the male terminal, and the other end of the female terminal is connected to the terminal positioning portion, the female terminal has at least one piercing tip for piercing the stator enameled wire, and a conductive lead is provided at the end of the male terminal for connecting to an external power supply, and the transverse cross-section of the piercing terminal is L-shaped.

[0022] In a further technical solution, the thickness of the rotor core is 8-20 mm, the bottom diameter of the rotor enameled wire is 40-100 mm, and at least when each group of the rotor enameled wire is respectively wound on the corresponding winding groove, the rotor enameled wire is located on the outside of the commutator, and the distance d4 from the lower end face of the commutator to the lower end face of the rotor core is ≤20 mm, and the outer diameter d7 of the commutator is smaller than the bottom diameter d6 of the rotor core.

[0023] In a further technical solution, an insulating part is arranged between the brush mounting plate and the rear bracket of the motor, each of the brushes includes a brush box mounted on the brush mounting plate and a brush embedded in the brush box, the rear bracket of the motor is formed with a brush avoidance groove, the insulating part protrudes into the brush avoidance groove, the lower part of the brush box has a rivet pin, the rivet pin extends downward through the brush mounting plate and is riveted to the lower end surface of the brush mounting plate, and the rivet pin is located above the insulating part.

[0024] In a further technical solution, the straight-line distance d8 between the brush mounting plate and the motor rear bracket in the vertical direction is ≤2.5mm, the straight-line distance d9 between the end of the riveted pin and the motor rear bracket in the vertical direction is ≤2.0mm, and the straight-line distance between the rotor core and the motor rear bracket in the vertical direction is 15-30mm.

[0025] In a further technical solution, the insulating member is an integrally formed annular insulating sheet, and brush insulating parts are protruding from the insulating sheet at positions corresponding to the brush avoidance slots, and the size and shape of each brush insulating part are adapted to the brush avoidance slot;

[0026] The brush mounting plate is provided with riveting holes at positions corresponding to each brush box. The brush box has a brush mounting cavity. The upper end of the brush box has a conductive connecting portion. The upper portion of the brush box has a baffle portion. At least after the brush is installed in the brush mounting cavity of the brush box, the baffle portion is bent inward and the conductive connecting portion is bent downward to close the rear end of the brush mounting cavity.

[0027] In a further technical solution, the transverse cross section of the riveting hole is in the shape of an arch bridge, the riveting hole includes a riveting plug section adapted to the riveting pin and an arch section extending inwardly from the riveting plug section, two opposite ends of the arch section respectively form a boss between the plug section, and the arch sections of a pair of riveting holes corresponding to the two riveting pins are arranged in opposite directions;

[0028] The length of the riveting pin is half of the width of the brush installation cavity. At least after the brush is installed in the brush installation cavity of the brush box, the two riveting pins abut against each other.

[0029] In a further technical solution, each end of the motor front bracket is respectively provided with a positioning connector, and each positioning connector extends outward to form a supporting connecting ear for supporting household appliances, and the distance between the motor front bracket and the motor rear bracket is ≤66mm.

[0030] After adopting the above structure, the advantages of the present invention compared with the prior art are:

[0031] The present invention reduces the height of the series-excited motor to the greatest extent by improving the stator assembly, the rotor assembly and the mounting structure of the two. When the various components of the series-excited motor are assembled, the distance between the front bracket of the motor and the rear bracket of the motor is ≤66mm. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0033] Figure 1 It is a schematic diagram of the structure of the present invention;

[0034] Figure 2 is a schematic structural diagram of a stator assembly of the present invention;

[0035] Figure 3 It is a structural schematic diagram of a stator core in the prior art;

[0036] Figure 4 is a top view of a stator core according to a first embodiment of the present invention;

[0037] Figure 5 is a top view of a stator core according to a second embodiment of the present invention;

[0038] Figure 6 is a side view of the stator core of the present invention;

[0039] Figure 7 It is a three-dimensional structural schematic diagram of the stator core of the present invention;

[0040] Figure 8 It is a structural schematic diagram of a stator bobbin of the present invention;

[0041] Fig. 9 It is a schematic diagram of the exploded structure of the stator bobbin of the present invention;

[0042] Fig.10 It is a structural schematic diagram of the upper split wire rack of the present invention;

[0043] Fig.11 It is a structural schematic diagram of the lower split wire rack of the present invention;

[0044] Fig.12 It is a structural schematic diagram of the piercing terminal of the present invention;

[0045] Fig.13 It is a schematic diagram of the structure of the rotor assembly and the rear bracket of the motor of the present invention;

[0046] Fig.14 It is a schematic diagram of the assembly of the commutator and the rotor core of the present invention;

[0047] Fig.15 It is a schematic diagram of assembling the commutator, the brush mounting plate and the rear bracket of the motor of the present invention;

[0048] Fig.16 It is a side view of the commutator and the rotor core after being assembled in the prior art;

[0049] Fig.17 is a side view of the commutator and the rotor core of the present invention after being assembled;

[0050] Fig.18 It is a schematic diagram of the winding structure of the rotor enameled wire and the winding slot in the prior art;

[0051] Fig.19 It is a schematic diagram of the winding structure of the rotor enameled wire and the winding groove of the present invention;

[0052] Fig. 20 It is a schematic diagram of the assembly of a brush box and a brush mounting plate in the prior art;

[0053] Fig.21It is a schematic diagram of assembling the brush box, brush mounting plate and motor rear bracket of the present invention;

[0054] Fig. 22 yes Fig.21 A schematic diagram of the structure enlargement at the center A;

[0055] Fig.23 It is a schematic diagram of the exploded structure of the brush box, brush mounting plate and motor rear bracket of the present invention;

[0056] Fig.24 It is a front view of the brush box, brush mounting plate and motor rear bracket of the present invention;

[0057] Fig.25 It is a structural schematic diagram of the brush box of the present invention;

[0058] Fig.26 It is a schematic diagram of riveting a brush box and a brush mounting plate in the prior art;

[0059] Fig. 27 It is a schematic diagram of riveting the brush box and the brush mounting plate of the present invention;

[0060] Fig.28 It is a structural schematic diagram of the brush mounting plate of the present invention;

[0061] Fig.29 yes Fig.28 A magnified schematic diagram of the structure at point B in the middle. DETAILED DESCRIPTION

[0062] The following are only preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention.

[0063] like Figures 1 to 29 As shown, an improved flat series-excited motor provided by the present invention includes a stator assembly, a rotor assembly, a motor front bracket 18 and a motor rear bracket 7, the motor front bracket 18 and the motor rear bracket 7 are arranged in a vertically matched manner, the stator assembly is arranged between the motor front bracket 18 and the motor rear bracket 7, and the rotor assembly is rotatably matched with the stator assembly.

[0064] The stator assembly includes a stator bobbin 1 , a stator enameled wire 2 wound around the stator bobbin 1 , and a stator core 3 mounted on the stator bobbin 1 .

[0065] The installation part of the stator core 3: Figure 2-Figure 6As shown, the transverse cross section of the stator core 3 is annular, and the stator core 3 is provided with at least four threading grooves 30, which are distributed in annular intervals, and the center point of each threading groove 30 forms an angle of 90° with the center point of the stator core 3. The outer diameter d1 of the stator core 3 is 100-200 mm, the thickness d2 of the stator core 3 is 5-20 mm, and the inner diameter d3 of the stator core 3 is 60-110 mm. The present invention greatly reduces the height of the motor and the volume by increasing the outer diameter of the stator core 3 to reduce the thickness of the stator core 3, thereby meeting the demand for miniaturization of terminal home appliances. Secondly, while the outer diameter of the stator core 3 is enlarged, the present invention adopts a structure of four threading grooves 10 to solve the problem of two-pole coils (such as Figure 3 The problem of large span and low life is solved by adopting the single-phase four-pole stator core structure. The motor power is as high as 2000W.

[0066] In a feasible implementation scheme, the outer diameter d1 of the stator core 3 is 100-120 mm, the thickness d2 of the stator core 3 is 10-18 mm, and the inner diameter d3 of the stator core 3 is 60-70 mm.

[0067] In a specific implementation scheme, the outer diameter d1 of the stator core 3 is 105 mm, the thickness d2 of the stator core 3 is 15 mm, and the inner diameter d3 of the stator core 3 is 67 mm.

[0068] In another feasible implementation scheme, the outer diameter d1 of the stator core 3 is 120-140 mm, the thickness d2 of the stator core 3 is 10-15 mm, and the inner diameter d3 of the stator core 3 is 70-80 mm.

[0069] In a specific implementation scheme, the outer diameter d1 of the stator core 3 is 120 mm, the thickness d2 of the stator core 3 is 10 mm, and the inner diameter d3 of the stator core 3 is 76 mm.

[0070] In another feasible implementation manner, the outer diameter d1 of the stator core 3 is 140-160 mm, the thickness d2 of the stator core 3 is 7-15 mm, and the inner diameter d3 of the stator core 3 is 80-90 mm.

[0071] In a specific implementation scheme, the outer diameter d1 of the stator core 3 is 140 mm, the thickness d2 of the stator core 3 is 10 mm, and the inner diameter d3 of the stator core 3 is 81 mm.

[0072] In another feasible implementation manner, the outer diameter d1 of the stator core 3 is 160-200 mm, the thickness d2 of the stator core 3 is 7-15 mm, and the inner diameter d3 of the stator core 3 is 90-110 mm.

[0073] In a specific implementation scheme, the outer diameter d1 of the stator core 3 is 160 mm, the thickness d2 of the stator core 3 is 7 mm, and the inner diameter d3 of the stator core 3 is 95.5 mm.

[0074] Stator wire frame 1 part: The stator wire frame 1 is provided with an upper split frame 10 and a lower split frame 11. The lower part of the upper split frame 10 has an upper shielding part 100, and the upper part of the lower split frame 11 has a lower shielding part 110. The upper shielding part 100 and the lower shielding part 110 are arranged in a matched or inserted manner to form an enameled wire insulation part 12. The outer edge of the enameled wire insulation part 12 is provided with a core placement groove 13 for accommodating the stator core 3. The inner edge of the enameled wire insulation part 12 is provided with a plurality of wire placement grooves 14 for accommodating the stator enameled wire 2. Each wire placement groove 14 is respectively matched with the corresponding threading groove 30 up and down. The stator enameled wire package 2 is directly insulated from the stator core 3 through the enameled wire package insulation part 12. Compared with the stator wire frame 1 in the prior art, it does not need to add an insulating sheet. Its structure is compact, so that the volume of the stator assembly tends to be miniaturized, the height is low, and the practicality is high.

[0075] The transverse cross section of the core slot 13 is "C" shaped, and the transverse cross section of the wire slot 14 is "mouth" shaped or "O" shaped. The stator enameled wire 2 is accommodated in the wire slot 14, so that the stator assembly is assembled, and the stator enameled wire 2 and the stator core 3 are in the same horizontal plane. The structure is compact, so that the volume of the stator assembly tends to be miniaturized and has high practicality. It is particularly noted that the number of wire slots 14 is 4, 6 or 8, and the four threading slots 30 of the stator core 3 are consistent with the number of wire slots 14. The stator core, stator wire frame, and piercing terminal in the present invention are suitable for four-pole series-excited motors, six-phase series-excited motors, or eight-phase series-excited motors. In order to clearly explain the working principle of the present invention, the embodiments and drawings proposed in the present invention all take four-pole motors as examples.

[0076] In a preferred implementation scheme, one side of the upper shielding part 100 and the lower shielding part 110 is provided with a mating part 1000, and the other side has a mating slot 1100 at a position corresponding to the mating part 1000; an upper wire block 101 is provided on the inner side of the upper split frame 10, and a lower wire block 111 is provided on the inner side of the lower split frame 11. The upper wire block 101 and the lower wire block 111 are arranged in a mating or mating arrangement to form a wire blocking part, and the wire groove 14 is formed between the wire blocking part and the enameled wire insulation part 12; the upper part of the upper split frame 10 extends outward An upper guide portion 102 is formed, and a lower guide portion 112 is formed on the upper portion of the lower split frame 11 extending outward. At least when the upper shielding portion 100 and the lower shielding portion 110 are matched or inserted, the core-setting groove 13 is formed between the upper guide portion 102, the lower guide portion 112 and the enameled wire insulating portion 12; a winding portion is formed between two adjacent wire-setting grooves 14, and the winding portion includes an upper winding portion 103 formed on the upper split frame 10 and a lower winding portion 113 formed on the lower split frame 11; so that the stator enameled wire 2 can be wound on the stator wire frame 1 by a standard winding equipment.

[0077] In a further technical solution, a terminal positioning portion 15 is provided at a position of the stator wire frame 1 corresponding to the wire groove 14, and the stator assembly is provided with a piercing terminal 16, the piercing terminal 16 includes a male terminal 160 and a female terminal 161, one end of the female terminal 161 is electrically connected to the male terminal 160, and the other end of the female terminal 161 is connected to the terminal positioning portion 15, the female terminal 161 has at least one piercing tip 1610 for piercing the stator enameled wire 2, and a conductive lead 1600 is provided at the end of the male terminal 160 for connecting to an external power supply. The transverse cross-section of the piercing terminal 16 is L-shaped. Compared with the traditional plug-in terminal, the structure of the piercing terminal 16 of the present invention further reduces the height of the entire stator assembly to reduce the overall height of the series-excited motor.

[0078] like Figure 13-Figure 19 As shown, the rotor assembly includes a rotor core 4, a commutator 5 and a brush mounting plate 6 which are arranged in sequence from top to bottom. The motor rear bracket 7 is located below the brush mounting plate 6. The middle of the rotor core 4 and the brush mounting plate 6 are both formed with an axial hole for the commutator 5 to pass through. The upper part of the commutator 5 is passed through the axial hole of the rotor core 4, and the lower part of the commutator 5 is passed through the axial hole of the brush mounting plate 6. The brush mounting plate 6 is installed with a plurality of brushes distributed in an axial array, and each brush is respectively in frictional contact with the commutator 5. The rotor core 4 is wound with at least four groups of rotor enameled wires 9, and a plurality of winding grooves 40 are opened on the outer edge of the rotor core 4. The number of brushes corresponds to the number of rotor enameled wires 9.

[0079] The installation structure of the upper part of the commutator 5: as shown in the figure, the outer diameter d5 of the rotor core 3 is 40-150mm, the thickness of the rotor core 4 is 8-20mm, the bottom diameter of the rotor enameled wire 9 is 40-100mm, at least when each group of the rotor enameled wires 9 is respectively wound on the corresponding winding grooves 40, the rotor enameled wire 9 is located on the outer side of the commutator 5, and the distance d4 from the lower end surface of the commutator 5 to the lower end surface of the rotor core 4 is ≤20mm. The winding method of each rotor enameled wire 9 and the winding grooves 40 is set to 16 winding grooves 40, and the number of cross-slots of the rotor enameled wire 9 is 4.

[0080] The present invention reduces the thickness of the rotor core 3 by increasing the outer diameter of the rotor core 3. At the same time, as the outer diameter of the rotor core 3 increases, the total number of winding slots 40 of the rotor core 3 can be increased, and the number of slots across the rotor enameled wire 9 is reduced relative to the total number of winding slots 40, so that the bottom diameter of the rotor enameled wire 9 becomes smaller, that is, the rotor enameled wire 9 gradually moves outward toward the outside of the rotor core 3. At least when each group of the rotor enameled wires 9 is respectively wound on the corresponding winding slots 40, the rotor enameled wire 9 is located outside the axial hole of the rotor core 3, and the upper part of the commutator 5 can be pressed down to be closer to the rotor core 3, so as to reduce the height of the entire rotor assembly and meet the demand for miniaturization of the household electrical appliance motor.

[0081] In a preferred embodiment, the outer diameter d7 of the commutator 5 is smaller than the bottom diameter d6 of the rotor core 4, further enabling the commutator 5 to be closer to the rotor core 3. Each rotor enameled wire 9 is wound in a corresponding winding slot 40 in a half-basket winding manner.

[0082] In other embodiments, the winding method of each rotor enameled wire 9 and the winding slot 40 is set to the following structure: the number of winding slots 40 is 32, the number of cross slots of the rotor enameled wire 9 is 8, the number of winding slots 40 is 64, and the number of cross slots of the rotor enameled wire 9 is 16. In order to clearly explain the principle of the present invention, the following embodiments are all based on the number of winding slots 40 being 16 and the number of cross slots of the rotor enameled wire 9 being 4 as reference benchmarks, and they are not repeated here one by one.

[0083] The installation structure of the lower part of the commutator 5: In practical applications, in order to meet the requirements of miniaturization of terminal household appliances and reducing the height of the whole series motor, the present invention changes the traditional brush installation structure to leave an installation space for the commutator 5, so that the lower part of the commutator 5 is closer to the brush installation plate 6.

[0084] Specifically, an insulating member 17 is provided between the brush mounting plate 6 and the motor rear bracket 7, each of the brushes includes a brush box 8 mounted on the brush mounting plate 6 and a brush embedded in the brush box 8, the motor rear bracket 7 is formed with a brush avoidance groove 70, the insulating member 17 protrudes into the brush avoidance groove 70, the lower part of the brush box 8 has a rivet pin 80, the rivet pin 80 extends downward through the brush mounting plate 6 and is riveted to the lower end surface of the brush mounting plate 6, and the rivet pin 80 is located above the insulating member 17.

[0085] In practical applications, the present invention passes the brush box 8 through the brush mounting plate 6 and rivets it to the lower end surface of the brush mounting plate 6, thereby reducing the overall height of the brush mounting structure to achieve the purpose of reducing the overall height of the series-excited motor, and the brush box 8 is insulated and separated from the motor rear bracket 7 by the insulating member 17, thereby meeting the safety requirements. Specifically, the straight-line distance d1 between the brush mounting plate 6 and the motor rear bracket 7 in the vertical direction is ≤2.5mm. After the brush box 8 is riveted, the end of the riveting pin 80 is ≤2.0mm from the motor rear bracket 7 in the vertical direction.

[0086] Preferably, after the upper and lower parts of the commutator 2 are installed respectively, the linear distance between the rotor core 4 and the motor rear bracket 7 in the vertical direction is 15-30 mm.

[0087] Among them, the insulating part 17 is an integrally formed annular insulating sheet, and the insulating sheet has protruding brush insulating parts 170 at the positions corresponding to the brush avoidance grooves 70. The size and shape of each brush insulating part 170 are adapted to the brush avoidance grooves 70. The insulating sheet is formed with a plurality of buckle holes, and the insulating sheet is buckled onto the top of the rear bracket 7 of the motor through the buckle holes, so that the overall brush installation structure is more compact to reduce the height of the brush installation structure.

[0088] The brush mounting plate 6 is provided with riveting holes 60 at positions corresponding to each brush box 8. The brush box 8 has a brush mounting cavity 83. The upper end of the brush box 8 has a conductive connecting portion 81. The upper portion of the brush box 8 has a baffle portion 82. At least after the brush is installed in the brush mounting cavity 83 of the brush box 8, the baffle portion 82 is bent inward and the conductive connecting portion 81 is bent downward to close the rear end of the brush mounting cavity 83 to prevent the brush from slipping out of the brush box 8 in the working state.

[0089] The transverse cross-section of the riveted hole 60 is in the shape of an arch bridge. The riveted hole 60 includes a riveted plug-in section 600 adapted to the riveted pin 80 and an arch section 601 arched inwardly extending from the riveted plug-in section 600. Two opposite ends of the arch section 601 respectively form a boss 602 between the plug-in section. The arch sections 601 of a pair of riveted holes 60 corresponding to the two riveted pins 80 are arranged in relative directions. The length of the riveted pin 80 is half of the width of the brush mounting cavity 83. At least after the brush is installed in the brush mounting cavity 83 of the brush box 8, the riveted pin 80 is actually inserted into the riveted plug-in section 300, and the upper part of the brush box 8 is clamped on the boss 602. The two riveted pins 80 abut against each other, so that the width of the lower part of the brush box 8 is always flush with the width of the upper part of the brush box 8, which solves the problem of a large gap between the carbon brush and the brush box 8 and significantly reduces the working noise. During the installation process, the insertion depths of the two riveting pins 80 on the left and right sides are always kept consistent. Secondly, preferably, the arch segments 601 of the pair of riveting holes 60 corresponding to the two riveting pins 80 are arranged in a relative direction, such as Figure 25-Figure 29 Compared with the structure in the prior art in which the arch section 601 is arranged outward and the plug section is arranged inward, the riveting gap of the brush mounting plate 6 of the present invention is large.

[0090] like Figure 1 As shown, each end of the motor front bracket 18 is respectively provided with a positioning connector 180, and each positioning connector 180 extends outward to form a supporting connecting ear 181. When the series-excited motor and the home appliance body are installed, the supporting connecting ear 181 can be used to support the home appliance body. It has a simple structure and high practical performance. Preferably, after the various components of the present invention are assembled, the distance between the motor front bracket 18 and the motor rear bracket 7 is ≤66mm.

[0091] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, according to the concept of the present invention, there will be changes in the specific implementation methods and application scopes. The content of this specification should not be understood as limiting the present invention.

Claims

1. An improved flat series motor, comprising a stator assembly, a rotor assembly, a motor front bracket and a motor rear bracket, the motor front bracket and the motor rear bracket are arranged in a vertically matched manner, the stator assembly is arranged between the motor front bracket and the motor rear bracket, and the rotor assembly is rotatably matched with the stator assembly, characterized in that: The stator assembly is provided with a stator bobbin, a stator enameled wire wound on the stator bobbin, and a stator core installed on the stator bobbin; The transverse cross section of the stator core is annular, and the stator core is provided with at least four threading grooves, which are distributed in annular intervals, and the angle between the center point of each threading groove and the center point of the stator core is 90°. The outer diameter d1 of the stator core is 100-200 mm, the thickness d2 of the stator core is 5-20 mm, and the inner diameter d3 of the stator core is 60-110 mm; The rotor assembly includes a rotor core, a commutator and a brush mounting plate which are arranged in sequence from top to bottom. The rear bracket of the motor is located below the brush mounting plate. The middle of the rotor core and the brush mounting plate are both formed with an axial hole for the commutator to pass through. The upper part of the commutator is passed through the axial hole of the rotor core, and the lower part of the commutator is passed through the axial hole of the brush mounting plate. The brush mounting plate is installed with a plurality of brushes distributed in an axial array, and each brush is respectively in friction contact with the commutator. At least four groups of rotor enameled wires are wound around the rotor core, and a plurality of winding slots are opened on the outer edge of the rotor core. The number of brushes corresponds to the number of poles of the stator core. The stator wire frame is provided with an upper split frame and a lower split frame, the lower part of the upper split frame is provided with an upper shielding part, the upper part of the lower split frame is provided with a lower shielding part, the upper shielding part and the lower shielding part are arranged in abutment or inserted in abutment to form an enameled wire insulation part, the outer edge of the enameled wire insulation part is provided with a core placement groove for accommodating the stator core, and the inner edge of the enameled wire insulation part is provided with a plurality of wire placement grooves for accommodating the stator enameled wire, and each wire placement groove is respectively arranged in abutment with the corresponding threading groove up and down; The thickness of the rotor core is 8-20 mm, the bottom diameter of the rotor enameled wire is 40-100 mm, at least when each group of the rotor enameled wire is respectively wound on the corresponding winding groove, the rotor enameled wire is located outside the commutator, the distance d4 from the end surface of the lower part of the commutator to the end surface of the lower part of the rotor core is ≤20 mm, and the outer diameter d7 of the commutator is smaller than the bottom diameter d6 of the rotor core (4).

2. An improved flat series motor according to claim 1, characterized in that: The outer diameter d5 of the rotor core is 40-150 mm, and four groups of rotor enameled wires are respectively wound in corresponding winding grooves, and the winding method of each rotor enameled wire and the winding groove is set to any one of the following structures: 1) The number of winding slots is 16, and the number of slots across the rotor enameled wire is 4; 2) The number of winding slots is 32, and the number of slots across the rotor enameled wire is 8; 3) The number of winding slots is 64, and the number of slots across the rotor enameled wire is 16.

3. An improved flat series motor according to claim 1, characterized in that: One of the upper shielding part and the lower shielding part is provided with a mating part, and the other part is provided with a mating slot at a position corresponding to the mating part; An upper wire stop block is arranged on the inner side of the upper split frame, and a lower wire stop block is arranged on the inner side of the lower split frame. The upper wire stop block and the lower wire stop block are arranged in abutment or inserted to form a wire stop portion, and the wire placement groove is formed between the wire stop portion and the enameled wire insulation portion; The upper portion of the upper split frame extends outward to form an upper guide portion, and the upper portion of the lower split frame extends outward to form a lower guide portion, at least when the upper shielding portion and the lower shielding portion are matched or inserted, the core-setting groove is formed between the upper guide portion, the lower guide portion and the enameled wire insulation portion; A winding portion is formed between two adjacent wire-arranging grooves, and the winding portion includes an upper winding portion formed on the upper split frame and a lower winding portion formed on the lower split frame; The transverse cross section of the core-setting groove is "C" shaped; The transverse cross section of the cable duct is "mouth" or "O" shaped; The number of wiring ducts is 4, 6 or 8.

4. An improved flat series motor according to claim 1, characterized in that: A terminal positioning portion is provided at a position of the stator wire frame corresponding to the wire groove, and the stator assembly is provided with a piercing terminal, which includes a male terminal and a female terminal. One end of the female terminal is electrically connected to the male terminal, and the other end of the female terminal is connected to the terminal positioning portion. The female terminal has at least one piercing tip for piercing the stator enameled wire, and a conductive lead is provided at the end of the male terminal for connecting to an external power supply. The transverse cross-section of the piercing terminal is L-shaped.

5. An improved flat series motor according to claim 1, characterized in that: An insulating member is arranged between the brush mounting plate and the rear bracket of the motor, each of the brushes comprises a brush box mounted on the brush mounting plate and a brush embedded in the brush box, a brush avoidance groove is formed on the rear bracket of the motor, the insulating member protrudes into the brush avoidance groove, a riveted pin is provided at the lower part of the brush box, the riveted pin extends downward through the brush mounting plate and is riveted to the lower end surface of the brush mounting plate, and the riveted pin is located above the insulating member.

6. An improved flat series motor according to claim 5, characterized in that: The straight-line distance d8 between the brush mounting plate and the rear bracket of the motor in the vertical direction is ≤2.5mm, the straight-line distance d9 between the end of the riveted pin and the rear bracket of the motor in the vertical direction is ≤2.0mm, and the straight-line distance between the rotor core and the rear bracket of the motor in the vertical direction is 15-30mm.

7. An improved flat series motor according to claim 5, characterized in that: The insulating member is an integrally formed annular insulating sheet, and brush insulating parts are protruded from the insulating sheet at positions corresponding to the brush avoidance slots, and the size and shape of each brush insulating part are adapted to the brush avoidance slots; The brush mounting plate is provided with riveting holes at positions corresponding to each brush box. The brush box has a brush mounting cavity. The upper end of the brush box has a conductive connecting portion. The upper portion of the brush box has a baffle portion. At least after the brush is installed in the brush mounting cavity of the brush box, the baffle portion is bent inward and the conductive connecting portion is bent downward to close the rear end of the brush mounting cavity.

8. An improved flat series motor according to claim 7, characterized in that: The transverse cross section of the riveting hole is in the shape of an arch bridge, and the riveting hole includes a riveting plug section adapted to the riveting pin and an arch section extending inwardly from the riveting plug section to form an arch, and two opposite ends of the arch section respectively form a boss between the plug section, and the arch sections of a pair of riveting holes corresponding to the two riveting pins are arranged in opposite directions; The length of the riveting pin is half of the width of the brush installation cavity. At least after the brush is installed in the brush installation cavity of the brush box, the two riveting pins abut against each other.

9. An improved flat series motor according to any one of claims 1 to 8, characterized in that: Each end of the motor front bracket is respectively provided with a positioning connector, and each positioning connector extends outward to form a supporting connecting ear for supporting household electrical appliances. The distance between the motor front bracket and the motor rear bracket is ≤66mm.

Images