CN111404329A

CN111404329A - B L DC integral type motor that clothes dryer used

Info

Publication number: CN111404329A
Application number: CN202010283446.5A
Authority: CN
Inventors: 江林飞; 孙豪远; 汪旭亮
Original assignee: Zhejiang Yongchang Electric Corp
Current assignee: Zhejiang Yongchang Electric Corp
Priority date: 2020-04-13
Filing date: 2020-04-13
Publication date: 2020-07-10

Abstract

The invention discloses a B L DC integrated motor for a clothes dryer, which comprises a stator, a rotor, a front end cover, a rear end cover and a rotating shaft, wherein the rotating shaft sequentially penetrates through the front end cover, the rotor, the rear end cover, a bottom plate and a shell, the rotor comprises a permanent magnet, the stator is arranged on the outer side of the rotor, the bottom plate is arranged on the outer side of the rear end cover, a driver module is arranged on the bottom plate, the driver module is covered by the shell and is fixed with the bottom plate and the rear end cover through bolts.

Description

B L DC integral type motor that clothes dryer used

Technical Field

The invention relates to a motor, in particular to a B L DC integrated motor for a clothes dryer.

Background

Some clothes dryers use induction motor or B L DC motor at present, B L DC motor is brushless DC motor, this motor has overcome the congenital defect of the brush DC motor, replace the mechanical commutator with the electronic commutator, the magnetic field that the stator produces has the same frequency with the magnetic field that the rotor produces, but the drive control part of B L DC motor is installed inside the rear end cap, the drive control part is very easy to damage because of the many electronic component, the maintenance drive control part needs to dismantle the maintenance after the rear end cap, cause the maintenance inconvenience, and the drive control part damages and often needs the whole replacement, if can mount drive control part and motor separately, the drive control part is no longer installed inside the rear end cap, so subsequent maintenance is convenient.

Disclosure of Invention

The invention provides a B L DC integrated motor for a clothes dryer, aiming at solving the problem that a drive control part of a B L DC motor is installed in a rear end cover, so that subsequent maintenance is inconvenient.

The technical scheme adopted by the invention is as follows:

the utility model provides a B L DC integral type motor that clothes dryer used, includes stator, rotor, front end housing, rear end cap and pivot, the pivot passes front end housing, rotor, rear end housing, bottom plate and shell in proper order, the rotor includes the permanent magnet, the stator is equipped with in the outside of rotor, rear end housing outside mounting plate, be equipped with the driver module on the bottom plate, cover the driver module with the shell and fix together through bolt and bottom plate, rear end cap, this B L DC motor passes through the installation driver module on the bottom plate, and the driver module is covered to the reuse shell, no longer need take apart the rear end housing of motor like this when the maintenance, only need dismantle the shell, then maintain the driver module on the bottom plate, if the driver module damages seriously can the direct disassembly bottom plate, install a new bottom plate that has driver module and shell again, easy maintenance, swift like this.

Furthermore, the stator comprises a stator core, the stator punching sheet firstly adopts linear bar-shaped punching to form single-layer stator iron core sheets, a plurality of single-layer stator iron core sheets are pressed and overlapped into the stator core after punching, then coils are wound on the stator tooth poles, then the bar-shaped stator core sheets are bent into a round shape, and finally the stator is subjected to injection molding. Most of stator punching sheets in the prior art at present adopt fan-shaped stator punching sheets, the material utilization rate is only 36%, 12 stator punching sheet grooves are punched on one silicon steel sheet by adopting linear strip-shaped punching, and the stator punching sheets are pressed and folded and then are bent to be round after punching, so that the material utilization rate can be improved to 67%.

Further, the single-layer stator core plate is provided with 12T-shaped iron core subsections, the upper portions of the iron core subsections are arc-shaped, the upper surface between every two iron core subsections is concave, the left side of each iron core subsection is provided with a convex circle, the radius of the convex circle is 0.8mm, the right side of each iron core subsection is provided with a concave circle, the radius of the concave circle is 0.8mm, the convex circle and the concave circle are connected, and the lower portion of each convex circle and the concave circle are provided with a transition angle of 30 degrees. The convex and concave circles are connected and the lower part is provided with a transition angle, the upper part of the core sections is arc-shaped, so that the bar-shaped stator core is bent into a circle and the first core section is connected with the last core section.

Furthermore, the heat dissipation block on the driver module is fixed through heat conduction glue and fixed by covering the heat dissipation block through the shell. The thermally conductive glue has two functions here: firstly, the adhesive is sticky and sticks to the radiating block; and the second is heat conduction. The shell can also support the radiating block to prevent the radiating block from shifting.

Further, the bottom plate and the outer shell are both circular shells made of plastic. The circular shell improves the space utilization rate, and the vent and the plug-in groove are required to be arranged on the shell, so that the plastic molding process is simple and convenient. Plastic is not conductive, which would lead to a risk of electrical leakage if it were made of aluminum, and the insertion of the insert into the insert pocket requires a safety distance of 6mm in the aluminum condition, whereas the aluminum housing often requires glue filling, after which the safety distance of 6mm cannot be guaranteed, so that the base plate and the housing are made of plastic here.

Furthermore, a plurality of triangular grooves are formed in the peripheries of the base plate and the shell, hollow triangular columns are arranged in the triangular grooves of the base plate, and solid triangular columns are arranged on the shell corresponding to the hollow triangular columns. When the shell is installed, the solid triangular columns of the shell are inserted into the hollow triangular columns on the bottom plate to position and fix the shell.

Furthermore, the rear end cover, the front end cover and the stator are connected through clamping grooves, and the rear end cover and the front end cover are fixed through bolts. The diameters of the joints of the rear end cover and the front end cover with the stator are larger than the diameters of the joints of the stator, so that the stator can be clamped into the front end cover and the rear end cover.

Furthermore, a plurality of ventilation openings are formed in the front end cover, the rear end cover and the shell. The vent is favorable for heat dissipation of the motor body and the driver module.

Further, the side of the shell is provided with an insert groove. The plug-in groove is used for plugging in the plug-in.

Further, the magnetic pole end of the stator core is provided with an anti-drop structure, and the anti-drop structure is U-shaped. When the motor is installed, the coil is wound on the stator core, and the anti-falling structure can prevent the coil from falling off.

The B L DC motor has the advantages that the B L DC motor adopts an integrated machine integrating a drive and a motor, namely, the driver module is installed on the bottom plate and covered by the shell, so that the rear end cover of the motor does not need to be disassembled any more during maintenance, only the shell needs to be disassembled, then the driver module is maintained on the bottom plate, if the driver module is seriously damaged, the bottom plate can be directly disassembled, and then a new bottom plate with the driver module and the shell is installed, so that the maintenance is convenient and rapid, the stator punching sheet adopts a process of punching in a linear strip shape, then winding a coil and then bending the stator punching sheet into a circle, the material utilization rate can be improved to 67 percent from 36 percent of that of the sector stator punching sheet, the heat dissipation block on the driver module is fixed through heat-conducting glue.

Drawings

FIG. 1 is a schematic diagram of the structure of the apparatus of the present invention;

FIG. 2 is a schematic view of the device of the present invention with the housing removed;

FIG. 3 is a bottom view;

FIG. 4 is a schematic view of a stator structure;

fig. 5 is a schematic structural view of a stator punching sheet.

In the figure, 1 is a rotating shaft, 2 is a hollow triangular column, 3 is a shell, 4 is a front end cover, 5 is a stator, 6 is a rear end cover, 7 is a bottom plate, 8 is an anti-falling structure, 9 is a driver module, 10 is a solid triangular column, 11 is a heat dissipation block, 12 is a rotor, 13 is a clamping groove, 14 is a ventilation opening, 15 is an insertion groove, 16 is a stator tooth pole, and 17 is a stator iron core.

Detailed Description

The invention is explained in detail below with reference to the figures and examples.

In the embodiment, as shown in fig. 1 to 5, a B L DC integrated motor for a clothes dryer comprises a stator 5, a rotor 12, a front end cover 4, a rear end cover 6 and a rotating shaft 1, wherein the rotating shaft 1 sequentially penetrates through the front end cover 4, the rotor 12, the rear end cover 6, a bottom plate 7 and a housing 3, the rotor 12 comprises a permanent magnet, the stator 5 is installed on the outer side of the rotor 12, the bottom plate 7 is installed on the outer side of the rear end cover 6, a driver module 9 is arranged on the bottom plate 7, the housing 3 covers the driver module 9 and is fixed with the bottom plate 7 and the rear end cover 6 through bolts, the B L DC motor adopts an integrated machine integrating driving and the motor, namely, the driver module 9 is installed on the bottom plate 7, and then the housing 3 covers the driver module 9, so that the rear end cover 6 of the motor does not need to be disassembled when being maintained, the housing 3 only needs to be disassembled, then the driver module 9 is maintained on the bottom plate 7, if the driver module 9 is damaged seriously, the bottom plate 7 can be directly disassembled, and then a new bottom.

Stator 5 includes stator core 17, adopts the punching press of straight line bar earlier to form individual layer stator iron core piece by the stator punching sheet, and a plurality of individual layer stator iron core piece presses and folds into stator core 17 after the punching press, then coils on stator tooth pole 16, later bends the stator core 17 of bar into circularly, and the stator is moulded plastics at last. Most of stator punching sheets in the prior art at present adopt fan-shaped stator punching sheets, the material utilization rate is only 36%, 12 stator punching sheet grooves are punched on one silicon steel sheet by adopting linear strip-shaped punching, and the stator punching sheets are pressed and folded and then are bent to be round after punching, so that the material utilization rate can be improved to 67%. And a plurality of punched silicon steel sheets are pressed and stacked to form a circle. The convex and concave circles are connected and the lower part is provided with an angle of overshoot, the upper parts of the core sections are arc-shaped, so that the bar-shaped stator core is bent into a circle and the first core section is connected with the last core section.

The single-layer stator core piece is provided with 12T-shaped iron core subsections, the upper parts of the iron core subsections are arc-shaped, the upper surface between every two iron core subsections is concave, the left side of each iron core subsection is provided with a convex circle, the radius of the convex circle is 0.8mm, the right side of each iron core subsection is provided with a concave circle, the radius of the concave circle is 0.8mm, the convex circle is connected with the concave circle, and the lower part of each convex circle is provided with a transition angle of 30 degrees. The convex and concave circles are connected and the lower part is provided with a transition angle, the upper part of the core sections is arc-shaped, so that the bar-shaped stator core is bent into a circle and the first core section is connected with the last core section.

The heat dissipation block 11 on the driver module 9 is fixed by heat conductive glue, and is fixed by covering the heat dissipation block 11 with the housing 3. The thermally conductive glue has two functions here: firstly, the adhesive is sticky and sticks to the radiating block; and the second is heat conduction. The housing 3 can also bear against the heat sink 11, preventing the heat sink 11 from being displaced.

The base plate 7 and the housing 3 are both circular shells made of plastic. The circular shell improves the space utilization rate, and the vent and the plug-in groove are required to be arranged on the shell 3, so that the plastic molding process is simple and convenient. Plastic is not conductive, which would lead to a risk of electrical leakage if it were made of aluminum, and the insertion of the insert into the insert pocket requires a safety distance of 6mm in the aluminum condition, whereas the aluminum housing often requires glue filling, after which the safety distance of 6mm cannot be guaranteed, so that the base plate and the housing are made of plastic here.

All be equipped with a plurality of triangle recesses around bottom plate 7 and shell 3, be equipped with hollow triangular prism 2 in the triangle recess of bottom plate 7, the position that corresponds hollow triangular prism 2 on the shell 3 is equipped with solid triangular prism 10. When the shell 3 is installed, the solid triangular columns 10 of the shell 3 are inserted into the hollow triangular columns 2 on the bottom plate 7 to position and fix the shell 3. Accurate quick location of shell is realized through pegging graft of hollow triangular prism and solid triangular prism, cancels the screw fixation and improves the installation effectiveness, reduce cost.

The rear end cover 6, the front end cover 4 and the stator 5 are connected through a clamping groove 13, and the rear end cover 6 and the front end cover 4 are fixed through bolts. The diameters of the rear end cover 6 and the joint of the front end cover 4 and the stator 5 are larger than that of the stator 5, namely, the opening and closing positions of the front end cover 4 and the rear end cover 6 are in a step type, so that the stator can be clamped into the front end cover 4 and the rear end cover 6.

The front end cover 4, the rear end cover 6 and the shell 3 are all provided with a plurality of ventilation openings 14. The design of the ventilation opening 14 facilitates heat dissipation of the motor body and the driver module 9.

The side of the housing 3 is provided with an insert groove 15. The card slot 15 is for a card.

The magnetic pole end of the stator core is provided with an anti-drop structure 8, and the anti-drop structure is U-shaped. When the motor is installed, the coil is wound on the stator core, and the anti-falling structure 8 can prevent the coil from falling off.

Claims

1. The utility model provides a B L DC integral type motor that clothes dryer was used, includes stator (5), rotor (12), front end housing (4), rear end cap (6) and pivot (1), its characterized in that, front end housing (4), rotor (12), rear end housing (6), bottom plate (7) and shell (3) are passed in proper order in pivot (1), rotor (12) include the permanent magnet, stator (5) are equipped with in the outside of rotor (12), rear end housing (6) outside mounting plate (7), be equipped with driver module (9) on bottom plate (7), cover driver module (9) and fix together through bolt and bottom plate (7), rear end cap (6) with shell (3).

2. The integrated B L DC motor for clothes dryer according to claim 1, wherein the stator (5) comprises a stator core (17), a single-layer stator core sheet is formed by punching a stator lamination sheet by a linear bar shape, a plurality of single-layer stator core sheets are laminated to form the stator core (17) after punching, then coils are wound on the stator teeth (16), then the bar-shaped stator core (17) is bent to be circular, and finally the stator is injection-molded.

3. A B L DC unitary motor for a clothes dryer according to claim 2, wherein the single stator core has 12T-shaped core segments, the upper portion of the core segments is arc-shaped, the upper surface between each core segment is concave, the left side of each core segment is provided with a convex circle with a radius of 0.8mm, the right side of each core segment is provided with a concave circle with a radius of 0.8mm, the convex and concave circles are connected and the lower portion is provided with a transition angle of 30 degrees.

4. A B L DC unitary motor for a clothes dryer according to claim 1, wherein the heat dissipating block (11) of the driver module (9) is fixed by a heat conductive adhesive and fixed by a housing (3) covering the heat dissipating block (11).

5. A B L DC unitary motor for a clothes dryer according to claim 1, wherein the base plate (7) and the housing (3) are both circular shells made of plastic.

6. The B L DC integrated motor for the clothes dryer according to claim 1, wherein a plurality of triangular grooves are formed around the base plate (7) and the shell (3), hollow triangular columns (2) are arranged in the triangular grooves of the base plate (7), and solid triangular columns (10) are arranged on the shell (3) corresponding to the hollow triangular columns (2).

7. The B L DC integrated motor for the clothes dryer according to claim 1, wherein the rear end cover (6) and the front end cover (4) are connected with the stator (5) through clamping grooves (13), and the rear end cover (6) and the front end cover (4) are fixed through bolts.

8. The B L DC integral motor for the clothes dryer according to claim 1, wherein the front cover (4), the rear cover (6) and the shell (3) are all provided with a plurality of ventilation openings (14).

9. A B L DC unitary motor for clothes dryer according to claim 1, wherein the side of the housing (3) is provided with an insert groove (15).

10. The B L DC integrated motor for the clothes dryer according to claim 2, wherein the pole end of the stator core (17) is provided with a drop-off prevention structure (8) having a U-shape.