CN217362673U - Stator for external rotor motor with encapsulation structure and external rotor motor - Google Patents

Abstract

The utility model discloses a stator for an external rotor motor with an encapsulating structure and the external rotor motor, wherein the stator comprises a stator component, an end cover, a bearing seat, a control circuit board and a retainer ring; the end cover comprises an end plate and a first sleeve, a check ring is arranged at the top of the first sleeve, a cavity is defined by the check ring, the end plate and the first sleeve, the control circuit board is arranged in the cavity, pouring sealant is injected into the cavity, the bearing block is arranged on the end plate, and the stator assembly is sleeved outside the bearing block; the retaining ring includes ring baffle and second sleeve, the telescopic bottom axial protrusion of second has the buckle, the axial protrusion of first telescopic top surface has first annular boss, the draw-in groove has been seted up to first annular boss lateral wall, second sleeve suit is outside first annular boss, and the buckle joint is in order to install the retaining ring on the end cover in the draw-in groove, can effectively strengthen the joint strength between retaining ring and the end cover, improve overall structure's steadiness, the retaining ring is by the casting glue jack-up when can avoiding pouring into the casting glue, ensure that retaining ring and end cover can not divide the body easily.

Description

Stator for external rotor motor with encapsulation structure and external rotor motor

The technical field is as follows:

the utility model relates to a take stator and external rotor electric machine that external rotor electric machine of embedment structure used.

The background art comprises the following steps:

at present, the motor can be divided into a driving motor and a control motor according to purposes, the working environment of the motor is complicated at present, the mechanical performance and the electrical performance of the motor are considered, the insulating and waterproof performance of the motor is also considered, and the stator encapsulation mode is one of effective waterproof and insulating modes. The existing outer rotor encapsulation motor for control comprises an outer rotor, a control panel, a stator component and an end cover fixedly connected with the stator, wherein the end cover is provided with a cavity with an opening, the control panel is arranged in the cavity, the outer rotor is sleeved outside the stator component, a coil winding of the stator component is electrically connected with the control panel through a lead-out wire, and encapsulation glue is injected into the cavity to encapsulate the control panel, so that the water resistance and the insulation property of the motor can be improved, and the motor is better protected, but in the existing motor structure, because the thickness of the end cover is thin and the opening end of the end cover does not limit the encapsulation glue, in order to ensure that the encapsulation glue can encapsulate the control panel, the encapsulation glue is filled in the cavity of the end cover, the encapsulation glue is easy to overflow from the opening of the end cover, the thickness of the encapsulation glue is uneven, the water resistance and the insulation property of the motor are poor, and the waste of the encapsulation glue is caused, thereby increasing the manufacturing cost of the motor; in addition, when stator module coil winding passes through the lead-out wire and is connected with the control panel electricity, because the open end of end cover does not have the restriction to the line of walking of lead-out wire, this lead-out wire portion is along radial direction protrusion in end cover, can make when the embedment like this to expose the electric wire and need arrange the electric wire in order to avoid to increase the embedment degree of difficulty, reduction in production efficiency improves manufacturing cost.

In order to solve the above problems, the applicant has previously filed related patents, and specific references can be made to the publication numbers: CN 214850710U, patent name: the utility model provides a take novel embedment structure's external rotor electric machine's stator and external rotor electric machine, this patent passes through the combination of retaining ring and end cover, the open end that makes the end cover receives the restriction, can prevent that the casting glue from spilling over from the end cover opening easily, make casting glue thickness even, ensure the waterproof nature and the insulating nature of motor good, and can also avoid the waste of casting glue, reduce the manufacturing cost of motor, this retaining ring can also further improve the waterproof nature and the insulating nature of motor, thereby improve the protection grade of motor, but the direct suit of this retaining ring is on the end cover, connect insecurely, lead to the structure insecure, there is the risk that the casting glue withstood the retaining ring when pouring into the casting glue, thereby lead to retaining ring and end cover components of a whole that can function independently.

The invention content is as follows:

the utility model aims at providing a take stator and external rotor electric machine that external rotor electric machine of embedment structure was used can solve the direct suit of retaining ring among the prior art on the end cover, and the connection is insecure, leads to the structure insecure, has the risk of casting glue with retaining ring jack-up when pouring into the casting glue to lead to the technical problem of retaining ring and end cover components of a whole that can function independently.

The purpose of the utility model is realized by the following technical scheme.

The utility model aims at providing a stator for an external rotor motor with an encapsulating structure, which comprises a stator component, an end cover, a bearing seat, a control circuit board and a retainer ring; the end cover comprises an end plate and a first sleeve axially protruding from the edge of the end plate, the check ring is installed at the top of the first sleeve, the check ring, the end plate and the first sleeve form a cavity, the control circuit board is arranged in the cavity, pouring sealant for packaging the control circuit board is poured in the cavity, the bearing block is installed on the end plate, and the stator assembly is sleeved outside the bearing block;

the retaining ring includes annular baffle and follows annular baffle edge axial convex second sleeve, is provided with the buckle on the second sleeve, and first telescopic top surface axial protrusion has first annular boss, and the draw-in groove has been seted up to first annular boss lateral wall, and second sleeve suit is outside first annular boss, and the buckle joint is in order to install the retaining ring on the end cover in the draw-in groove.

Preferably, a positioning block axially protrudes from the top surface of the first annular boss, the annular baffle is provided with a positioning hole, and the positioning block is inserted into the positioning hole to circumferentially position the retainer ring.

Preferably, a plurality of positioning blocks are arranged and circumferentially distributed on the top surface of the first annular boss at intervals; the plurality of buckles are arranged and circumferentially distributed at intervals at the bottom of the second sleeve; the clamping groove is an annular clamping groove.

Preferably, the top surface of the annular baffle is protruded with a fourth annular boss and a fifth annular boss, the fifth annular boss is arranged around the periphery of the fourth annular boss, a protection groove is formed between the fourth annular boss and the fifth annular boss, and a notch communicated with the protection groove is formed in the fifth annular boss.

Preferably, the retainer ring is located below the stator assembly, the retainer ring surrounds the outside of the bearing seat, a gap is reserved between the retainer ring and the bearing seat, and the gap is used for injecting pouring sealant into the cavity.

Preferably, the central point of end plate puts the protrusion and is provided with first boss, and first boss periphery stretches out the first installation foot that has a plurality of circumference distributions, the outer wall of the bottom of bearing frame stretches out the second installation foot that has a plurality of circumference distributions, the bearing frame supports at first boss, and the second installation foot corresponds with first installation foot, and the second installation foot passes through first screw fixed mounting on first installation foot.

Preferably, on the end plate, one side protrusion of first boss has a plurality of arc bosss that circumference distributes, control scheme board passes through third screw fixed mounting on the arc boss, the confession has been seted up on the control scheme board the third through-hole that the bearing frame passed, each arc boss with be provided with insulating the pad between the control scheme board, the shape of insulating pad and the shape looks adaptation of arc boss.

Preferably, a plurality of circumferentially distributed convex columns protrude from the periphery of the first boss on the end plate, a plurality of insulating seats are mounted on the control circuit board and correspond to the convex columns, and each insulating seat is fixedly mounted on the corresponding convex column through a second screw so as to reinforce the control circuit board.

Preferably, the insulating base comprises an insulating sleeve and a sealing plate located at one end of the insulating sleeve, a fourth through hole is formed in the sealing plate, a third annular boss axially protrudes from the other end of the insulating sleeve, a plurality of circumferentially distributed mounting holes are formed in the periphery of the third through hole in the control circuit board, the third annular boss is inserted into the mounting holes, the convex columns penetrate through the mounting holes and extend into the insulating sleeve, second screw holes are formed in each convex column, and second screws penetrate through the fourth through holes and are in threaded connection with the second screw holes.

Preferably, a plurality of wiring terminals are mounted on the control circuit board, each wiring terminal comprises a terminal body and a wiring part extending out of the end part of the terminal body, each wiring part is of a cylindrical structure, and the terminal body is locked on the control circuit board through a fourth screw hole.

Preferably, the bottom surface of the end plate is concavely provided with a groove, and a dust cover is embedded in the groove.

The outer rotor motor comprises a stator, a rotating shaft and an outer rotor, wherein the outer rotor is sleeved outside the stator, the rotating shaft is connected with the outer rotor, the outer rotor comprises a rotor shell and a plurality of permanent magnets, the permanent magnets are circumferentially installed on the inner wall surface of the rotor shell at intervals, the stator adopts the stator with the encapsulating structure for the outer rotor motor, the outer rotor is positioned above a retaining ring of the stator, and the opening end of the rotor shell extends into a protective groove of the retaining ring.

Compared with the prior art, the utility model, following effect has:

1) the utility model provides a take stator that external rotor motor of embedment structure used, retaining ring and end cover pass through the cooperation realization fixed mounting of buckle and draw-in groove, can effectively strengthen the joint strength between retaining ring and the end cover, improve overall structure's steadiness, and the retaining ring is by the pouring sealant jack-up when can avoiding pouring into the pouring sealant, ensures that retaining ring and end cover can not divide the body easily.

2) Other advantages of the present invention will be described in detail in the examples section.

Description of the drawings:

fig. 1 is a schematic perspective view of a stator according to an embodiment of the present invention;

fig. 2 is an exploded schematic view of a stator according to an embodiment of the present invention;

fig. 3 is a schematic top view of a stator according to an embodiment of the present invention;

FIG. 4 is a schematic cross-sectional view A-A provided in FIG. 3;

FIG. 5 is an enlarged schematic view of the structure of portion B provided for FIG. 4;

FIG. 6 is an enlarged schematic view of the structure of section C provided for FIG. 4;

fig. 7 is a schematic perspective view of a retainer ring according to a first embodiment of the present invention;

fig. 8 is a schematic perspective view of a control circuit board according to an embodiment of the present invention;

fig. 9 is an exploded view of the stator at another angle according to an embodiment of the present invention;

fig. 10 is an exploded schematic view of a motor according to a second embodiment of the present invention;

fig. 11 is a schematic view of an internal structure of a motor according to a second embodiment of the present invention.

The specific implementation mode is as follows:

the present invention will be described in further detail with reference to the following detailed description of preferred embodiments and accompanying drawings.

The first embodiment is as follows:

as shown in fig. 1 to 5 and 7, the present embodiment provides a stator for an outer rotor motor with a potting structure, including a stator assembly 1, an end cover 2, a bearing block 3, a control circuit board 4, and a retainer ring 5; the end cover 2 comprises an end plate 21 and a first sleeve 22 axially protruding from the edge of the end plate 21, the retainer ring 5 is installed at the top of the first sleeve 22, a cavity is defined by the retainer ring 5, the end plate 21 and the first sleeve 22, the control circuit board 4 is arranged in the cavity, potting adhesive 10 used for encapsulating the control circuit board 4 is injected in the cavity, the bearing seat 3 is installed on the end plate 21, the stator assembly 1 comprises a stator core 11, end insulation 12 and a coil winding 13, the end insulation 12 is installed on the surface of the stator core 11, the coil winding 13 is wound on the end insulation 12, the stator core 11 is sleeved outside the bearing seat 3, and an outgoing line of the coil winding 13 is electrically connected with the control circuit board 4; retaining ring 5 includes ring baffle 51 and follows ring baffle 51 edge axial convex second sleeve 52, be provided with buckle 53 on the second sleeve 52, the top surface axial protrusion of first sleeve 22 has first annular boss 23, draw-in groove 231 has been seted up to first annular boss 23 lateral wall, second sleeve 52 suit is outside first annular boss 23, and buckle 53 joint is in order to install retaining ring 5 on end cover 2 in draw-in groove 231, can effectively strengthen the joint strength between retaining ring 5 and the end cover 2, the steadiness of overall structure is improved, retaining ring 5 is jack-up by casting compound 10 when can avoiding pouring into casting compound 10, ensure that retaining ring 5 can not split body easily with end cover 2.

As shown in fig. 2, a positioning block 24 axially protrudes from a top surface of the first annular boss 23, the annular baffle 51 is provided with a positioning hole 54, and the positioning block 24 is inserted into the positioning hole 54 to circumferentially position the retainer ring 5, so as to facilitate quick installation of the retainer ring 5 and the end cover 2.

As shown in fig. 2, a plurality of positioning blocks 24 are arranged, and a plurality of positioning blocks 24 are circumferentially distributed on the top surface of the first annular boss 23 at intervals; a plurality of the buckles 53 are arranged, and the plurality of the buckles 53 are circumferentially distributed at intervals at the bottom of the second sleeve 52; the clamping groove 231 is an annular clamping groove; reasonable in design, simple to operate.

As shown in fig. 2, a fourth annular boss 55 and a fifth annular boss 56 protrude from the top surface of the annular baffle 51, the fifth annular boss 56 surrounds the fourth annular boss 55, a protection groove 57 is formed between the fourth annular boss 55 and the fifth annular boss 56, and a gap 58 communicated with the protection groove 57 is formed on the fifth annular boss 56; the design of the shield slots 57 enhances the overall protection rating of the motor.

As shown in fig. 1 and 4, the retaining ring 5 is located below the stator assembly 1, the retaining ring 5 surrounds the outside of the bearing seat 3, a gap is reserved between the retaining ring 5 and the bearing seat 3, and the gap is used for injecting the potting adhesive 10 into the cavity.

As shown in fig. 2, a first boss 25 is convexly disposed at a central position of the end plate 21, a second annular boss 26 used for positioning the bearing seat 3 is disposed on an end surface of the first boss 25, a first through hole 27 penetrating through the end plate 21 is disposed at a central position of the second annular boss 26, a plurality of circumferentially distributed first mounting feet 28 extend from an outer periphery of the first boss 25, a second through hole 281 is disposed on each first mounting foot 28, a plurality of circumferentially distributed second mounting feet 31 extend from an outer wall surface of a bottom of the bearing seat 3, the second mounting feet 31 correspond to the first mounting feet 28, each second mounting foot 31 is provided with a first screw hole 311, the bearing seat 3 is supported on the first boss 25, and is in threaded connection with the first screw holes 311 after the first screw 20 passes through the second through hole 281, so that the bearing seat 3 is fixedly mounted on the end cover 2.

As shown in fig. 2, a plurality of arc-shaped bosses 29 which are circumferentially distributed protrude from one side of the first boss 25 on the end plate 21, a plurality of third screw holes 291 are formed in the arc-shaped bosses 29, a plurality of fifth through holes 41 are formed in the control circuit board 4, and the control circuit board 4 is fixedly mounted on the arc-shaped bosses 29 by being in threaded connection with the third screw holes 291 after passing through the fifth through holes 41 by third screws 30, a third through hole 42 through which the bearing seat 3 passes is formed in the control circuit board 4, and an insulating pad 6 is arranged between each arc-shaped boss 29 and the control circuit board 4, as shown in fig. 8, the shape of the insulating pad 6 is matched with the shape of the arc-shaped boss 29.

As shown in fig. 6, a plurality of circumferentially distributed convex columns 7 protrude from the periphery of the first boss 25 on the end plate 21, a plurality of insulating bases 8 are mounted on the control circuit board 4, the insulating bases 8 correspond to the convex columns 7, and each insulating base 8 is fixedly mounted on the corresponding convex column 7 through a second screw 40 to reinforce the control circuit board 4; specifically, the insulating base 8 includes an insulating sleeve 81 and a sealing plate 82 located at one end of the insulating sleeve 81, a fourth through hole 83 is formed in the sealing plate 82, a third annular boss 84 axially protrudes from the other end of the insulating sleeve 81, a plurality of circumferentially distributed mounting holes 43 are formed in the periphery of the third through hole 42 on the control circuit board 4, the third annular boss 84 is inserted into the mounting holes 43, the convex column 7 penetrates through the mounting holes 43 and extends into the insulating sleeve 81, a second screw hole 71 is formed in each convex column 7, and the second screw 40 penetrates through the fourth through hole 83 and then is in threaded connection with the second screw holes 71.

As shown in fig. 2, a plurality of connection terminals 9 are mounted on the control circuit board 4, each connection terminal 9 includes a terminal body 91 and a connection portion 92 extending out of an end of the terminal body 91, the connection portion 92 is of a cylindrical structure, the terminal body 91 is locked on the control circuit board 4 through a fourth screw hole 50, and the connection portion 92 is electrically connected to the lead-out wire of the coil winding 13 in a riveting manner, so that connection efficiency can be improved.

As shown in fig. 9, a concave groove 211 is concavely formed on the bottom surface of the end plate 21, the concave groove 211 corresponds to the first through hole 27, and a dust cover 60 is embedded in the concave groove 211 to improve the protection grade of the motor.

The second embodiment:

as shown in fig. 10 and 11, the present embodiment provides an external rotor motor, which includes a stator 70, a rotating shaft 80, and an external rotor 90, where the external rotor 90 is sleeved outside the stator 70, the rotating shaft 80 is connected with the external rotor 90, the external rotor 90 includes a rotor housing 901 and a plurality of permanent magnets 902, the plurality of permanent magnets 902 are circumferentially installed on an inner wall surface of the rotor housing 901 at intervals, the stator 70 adopts the stator for the external rotor motor with the potting structure according to the first embodiment, the external rotor 90 is located above a retaining ring 5 of the stator 70, and an open end of the rotor housing 901 extends into a protective groove 57 of the retaining ring 5.

The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited thereto, and any other changes, modifications, substitutions, combinations, and simplifications made without departing from the spirit and principle of the present invention are equivalent replacement modes, and are all included in the scope of the present invention.

Claims (12)

1. A stator with an encapsulating structure for an outer rotor motor comprises a stator component (1), an end cover (2), a bearing seat (3), a control circuit board (4) and a check ring (5); the end cover (2) comprises an end plate (21) and a first sleeve (22) axially protruding from the edge of the end plate (21), a check ring (5) is installed at the top of the first sleeve (22), a cavity is formed by the check ring (5), the end plate (21) and the first sleeve (22) in a surrounding mode, the control circuit board (4) is arranged in the cavity, pouring sealant (10) used for packaging the control circuit board (4) is poured into the cavity, the bearing seat (3) is installed on the end plate (21), and the stator assembly (1) is sleeved outside the bearing seat (3);

the method is characterized in that: retaining ring (5) include ring baffle (51) and follow ring baffle (51) edge axial bulge second sleeve (52), be provided with buckle (53) on second sleeve (52), the top surface axial bulge of first sleeve (22) has first annular boss (23), draw-in groove (231) have been seted up to first annular boss (23) lateral wall, second sleeve (52) suit is outside first annular boss (23), and buckle (53) joint is in draw-in groove (231) in order to install retaining ring (5) on end cover (2).

2. The stator for the external rotor motor with the potting structure as claimed in claim 1, wherein: the top surface of the first annular boss (23) axially protrudes with a positioning block (24), the annular baffle (51) is provided with a positioning hole (54), and the positioning block (24) is inserted into the positioning hole (54) to realize the circumferential positioning of the retainer ring (5).

3. The stator for the external rotor motor with the potting structure as claimed in claim 2, wherein: a plurality of positioning blocks (24) are arranged, and the plurality of positioning blocks (24) are circumferentially distributed on the top surface of the first annular boss (23) at intervals; the number of the buckles (53) is multiple, and the buckles (53) are circumferentially distributed at the bottom of the second sleeve (52) at intervals; the clamping groove (231) is an annular clamping groove.

4. The stator for the external rotor motor with the potting structure as claimed in claim 3, wherein: annular baffle (51) top surface protrusion has fourth annular boss (55) and fifth annular boss (56), and fifth annular boss (56) enclose and locate fourth annular boss (55) periphery, and forms between fourth annular boss (55) and fifth annular boss (56) protective groove (57), sets up a breach (58) that communicate with protective groove (57) on fifth annular boss (56).

5. The stator for an external rotor motor with a potting structure according to claim 1, 2, 3 or 4, wherein: retaining ring (5) are located stator module (1) below, retaining ring (5) surround in outside bearing frame (3), just retaining ring (5) with leave the clearance between bearing frame (3), the clearance is used for past pour into casting glue (10) in the cavity.

6. The stator for the external rotor motor with the potting structure as claimed in claim 5, wherein: the central point of end plate (21) puts the protrusion and is provided with first boss (25), and first boss (25) periphery stretches out first installation foot (28) that have a plurality of circumference to distribute, the outer wall of the bottom of bearing frame (3) stretches out second installation foot (31) that have a plurality of circumference to distribute, bearing frame (3) support is in first boss (25), and second installation foot (31) correspond with first installation foot (28), and second installation foot (31) are through first screw (20) fixed mounting on first installation foot (28).

7. The stator for the external rotor motor with the potting structure as claimed in claim 6, wherein: on end plate (21), one side protrusion of first boss (25) has arc boss (29) that a plurality of circumference distribute, control scheme board (4) are through third screw (30) fixed mounting on arc boss (29), the confession has been seted up on control scheme board (4) third through-hole (42) that bearing frame (3) passed, each arc boss (29) with be provided with insulating pad (6) between control scheme board (4), the shape of insulating pad (6) and the shape looks adaptation of arc boss (29).

8. The stator for the external rotor motor with the potting structure as claimed in claim 7, wherein: on end plate (21) the periphery protrusion of first boss (25) has projection (7) that a plurality of circumference distributes, install a plurality of insulator seat (8) on control scheme board (4), insulator seat (8) correspond with projection (7), and every insulator seat (8) are in order to consolidate on projection (7) that correspond through second screw (40) fixed mounting control scheme board (4).

9. The stator for the external rotor motor with the potting structure as claimed in claim 8, wherein: insulating seat (8) are provided with fourth through-hole (83) including insulating sleeve (81) and shrouding (82) that are located insulating sleeve (81) one end on shrouding (82), and the other end axial protrusion of insulating sleeve (81) has third annular boss (84), in on control circuit board (4) a plurality of circumference distribution's mounting hole (43) have been seted up to the periphery of third through-hole (42), and third annular boss (84) cartridge is in mounting hole (43), boss (7) pass mounting hole (43) and stretch into in insulating sleeve (81), each be provided with second screw (71) on boss (7), second screw (40) pass behind fourth through-hole (83) and second screw (71) threaded connection.

10. The stator for the external rotor motor with the potting structure as claimed in claim 5, wherein: install a plurality of binding post (9) on control scheme board (4), binding post (9) include terminal body (91) and stretch out in wiring portion (92) of terminal body (91) tip, and wiring portion (92) are the tubular structure, and terminal body (91) are in through fourth screw (50) locking on control scheme board (4).

11. The stator for the external rotor motor with the potting structure as claimed in claim 5, wherein: the bottom surface of the end plate (21) is concavely provided with a groove (211), and a dustproof cover (60) is embedded in the groove (211).

12. The utility model provides an external rotor electric machine, includes stator (70), pivot (80) and external rotor (90), and external rotor (90) suit is in stator (70) outside, and pivot (80) link together with external rotor (90), and external rotor (90) include rotor housing (901) and a plurality of permanent magnet (902), and install on the internal face of rotor housing (901) its characterized in that a plurality of permanent magnet (902) circumference interval ground: the stator (70) adopts a stator for an external rotor motor with a potting structure as claimed in any one of claims 1 to 11, the external rotor (90) is positioned above the retainer ring (5) of the stator (70), and the open end of the rotor housing (901) extends into the protective groove (57) of the retainer ring (5).

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