CN109038911B

CN109038911B - Plastic packaging motor

Info

Publication number: CN109038911B
Application number: CN201811089747.3A
Authority: CN
Inventors: 丁佳婷; 高晓峰; 李庆; 刘丹; 黄润宇; 吴泽华; 陈东锁
Original assignee: Gree Electric Appliances Inc of Zhuhai; Zhuhai Kaibang Motor Manufacture Co Ltd
Current assignee: Gree Electric Appliances Inc of Zhuhai; Zhuhai Kaibang Motor Manufacture Co Ltd
Priority date: 2018-09-18
Filing date: 2018-09-18
Publication date: 2020-02-11
Anticipated expiration: 2038-09-18
Also published as: CN109038911A

Abstract

The invention provides a plastic package motor. The plastic package motor comprises a front end cover (1), a stator core (3), a rear end cover (2) and an electric corrosion prevention structure, wherein the front end cover (1), the stator core (3) and the rear end cover (2) are connected together in a conductive mode through the electric corrosion prevention structure, the electric corrosion prevention structure comprises a conductive connecting piece, a self-locking structure (4) is arranged on the front end cover (1), and the conductive connecting piece is locked through the self-locking structure (4) and is connected to the front end cover (1) in a conductive mode. According to the plastic package motor, the reliability of the electric corrosion prevention structure of the motor can be improved, so that the electric corrosion prevention structure of the motor is firm and is not easy to fall off.

Description

Plastic packaging motor

Technical Field

The invention belongs to the technical field of motors, and particularly relates to a plastic package motor.

Background

The current electric corrosion prevention method adopted in the motor industry mainly comprises the following steps: 1. the conductive adhesive tape is pasted on the plastic package shell and connected with the front end cover and the rear end cover of the motor, so that the potentials of the metal covers at the two ends of the motor are equal, but the conductive adhesive tape is not resistant to high temperature and high humidity environment, is easy to fall off in the transportation, installation and operation processes, and has low reliability; 2. the steel ball of the bearing is changed into the ceramic ball, so that the inner ring and the outer ring of the bearing are in an insulated state, but the cost is higher; 3. the lubricating grease of the bearing is made to be conductive, so that the inner ring and the outer ring of the bearing are in a conduction state, and the conductive lubricating grease is gradually reduced along with the prolonging of the service life of the bearing in the method, so that the lubricating property and the service life of the bearing are seriously influenced; 4. the shaft voltage is reduced, the electric conductor is arranged on the motor shaft and is close to the bearing frame, or the electric conductor is connected with the metal cover through the conductor stator iron core, the voltage difference of the inner ring and the outer ring of the bearing is changed, the operability of the method is poor, and the voltage to earth of the inner ring and the outer ring of the bearing is also in a high state.

The methods can reduce the electric corrosion of the plastic package motor bearing, but have corresponding problems, such as insecure connection of an electric corrosion prevention structure, easy falling and low reliability.

Disclosure of Invention

Therefore, the technical problem to be solved by the present invention is to provide a plastic package motor, which can improve the reliability of the electric corrosion prevention structure of the motor, so that the electric corrosion prevention structure of the motor is firm and is not easy to fall off.

In order to solve the problems, the invention provides a plastic package motor which comprises a front end cover, a stator core, a rear end cover and an electric corrosion prevention structure, wherein the electric corrosion prevention structure is used for electrically connecting the front end cover, the stator core and the rear end cover together, the electric corrosion prevention structure comprises a conductive connecting piece, a self-locking structure is arranged on the front end cover, and the conductive connecting piece is locked through the self-locking structure and is electrically connected to the front end cover.

Preferably, the front end cover is provided with a mounting hole, and the self-locking structure is detachably and fixedly arranged in the mounting hole.

Preferably, the self-locking structure comprises a mounting ring, a plurality of locking flaps protruding towards one side are arranged on the inner peripheral side of the mounting ring, a locking hole is formed in the middle of each locking flap, and the conductive connecting piece penetrates out of the locking hole and then is self-locked at the locking hole.

Preferably, the locking flaps are fan-shaped flaps arranged obliquely, and a movable gap is formed between every two adjacent locking flaps.

Preferably, the shape of the locking hole is adapted to the shape of the conductive connection member.

Preferably, the conductive connecting piece is a wire, and the relationship between the wire and the self-locking structure and the mounting hole satisfies:

d is greater than D2 and less than D1, and D is not less than D3 and not more than Dx;

d2 is the external diameter of locking lamella at the end of inserting, and Dd is the diameter of mounting hole, and D1 is the external diameter of locking lamella at the root, and D is the sinle silk diameter of wire, and D3 is the diameter of locking hole, and Dx is the total diameter of wire.

Preferably, the relationship between the wire and the self-locking structure and the mounting hole further satisfies: D1-Dd > D3-D.

Preferably, a sector ring segment is further connected between the root of the locking flap and the mounting ring, and the sector ring segments are combined to form a cylindrical segment matched with the mounting hole.

Preferably, the electric corrosion prevention structure further comprises an h-shaped lug, the h-shaped lug is in contact connection with the stator core, the extending end of the h-shaped lug is in conductive contact with the rear end cover, and the conductive connecting piece is in conductive connection with the h-shaped lug.

Preferably, a winding frame is fixedly arranged on the stator core, the h-shaped lug plate is fixedly arranged on the winding frame, and the bottom of the h-shaped lug plate is connected with the stator core.

Preferably, the h-shaped wiring piece comprises a top wiring portion, a framework connecting portion and an iron core connecting portion, the h-shaped wiring piece is in conductive contact with the rear end cover through the top wiring portion, the framework connecting portion is fixedly connected to the winding framework, and the iron core connecting portion is in conductive contact with the stator iron core.

Preferably, the plastic package motor further comprises an insulating sheath, the insulating sheath is sleeved outside the h-shaped wiring piece, and the top wiring portion of the h-shaped wiring piece extends out of the insulating sheath.

Preferably, the insulating sheath includes the one end open-ended cover body, and the top of the cover body is provided with the logical groove that supplies top wiring portion to stretch out, and skeleton connecting portion and iron core connecting portion set up in the cover internally.

Preferably, the iron core connecting portion include two gussets, form the draw-in groove between two gussets, and the cover body is provided with two first spacing grooves with gusset matched with towards the inside wall of gusset, forms spacing sand grip between two first spacing grooves, and the gusset setting is in first spacing inslot, and spacing sand grip card is gone into in the draw-in groove.

Preferably, the bottoms of the two rib plates are fixedly connected through a bending plate, and the bending plate is in conductive contact with the stator core.

Preferably, one side of the bottom of the sleeve body, which corresponds to the iron core connecting part, is provided with a bump, the bottom of the bump is provided with a second limiting groove, and the bending plate is clamped into the second limiting groove and is pressed on the stator iron core by the insulating sheath.

Preferably, a protrusion is disposed at one side of the bottom of the sleeve body corresponding to the iron core connecting portion, and a guide groove for guiding the conductive connecting member is formed between the protrusion and the sleeve body.

Preferably, the framework connecting portion comprises a plate body, and the plate body is provided with a spring sheet protruding towards the iron core connecting portion.

Preferably, the framework connecting part comprises a plate body, a clamping hook is arranged on the plate body, a caulking groove is formed in the winding framework, and the clamping hook is clamped into the caulking groove.

Preferably, the stator core is provided with a concave surface corresponding to the h-shaped wiring lug, and the h-shaped wiring lug extends into the stator core and is in contact connection with the concave surface.

The invention provides a plastic package motor which comprises a front end cover, a stator core, a rear end cover and an electric corrosion prevention structure, wherein the electric corrosion prevention structure is used for electrically connecting the front end cover, the stator core and the rear end cover together, the electric corrosion prevention structure comprises an electric conduction connecting piece, a self-locking structure is arranged on the front end cover, and the electric conduction connecting piece is locked through the self-locking structure and is electrically connected to the front end cover. When the conductive connecting piece of the plastic package motor is connected with the front end cover, the conductive connecting piece is connected through the self-locking structure arranged on the front end cover, self-locking can be realized when the conductive connecting piece is connected on the self-locking structure through the self-locking structure, so that the conductive connecting piece is prevented from being separated from the self-locking structure, the connection reliability between the conductive connecting piece and the front end cover is ensured, the electric corrosion prevention structure of the motor is more firmly connected and is not easy to fall off, and the electric corrosion prevention function of a bearing of the plastic package motor and the EMC performance of the motor are effectively improved.

Drawings

Fig. 1 is a schematic cross-sectional structure diagram of a plastic package motor according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of an electric corrosion prevention structure of the plastic package motor according to the embodiment of the present invention;

FIG. 3 is an enlarged schematic view of FIG. 2 at L;

FIG. 4 is another isometric view of an anti-galvanic structure of a plastic encapsulated motor in accordance with an embodiment of the present invention;

FIG. 5 is an enlarged schematic view of the structure at M of FIG. 4;

fig. 6 is an exploded schematic view of a self-locking structure of a plastic package motor according to an embodiment of the present invention;

fig. 7 is a schematic view of an assembly structure at a self-locking structure of a plastic package motor according to an embodiment of the present invention;

fig. 8 is an isometric view of the plastic package motor of the embodiment of the invention with the rear end cover removed;

fig. 9 is a perspective view of an h-shaped lug of the plastic package motor according to the embodiment of the invention;

fig. 10 is a perspective view of an insulating sheath of the plastic package motor according to the embodiment of the present invention;

fig. 11 is a perspective structural view of a self-locking structure of the plastic package motor according to the embodiment of the present invention;

fig. 12 is a first isometric view of the plastic encapsulated motor with the insulating sheath mated with the h-shaped lug in accordance with an embodiment of the present invention;

FIG. 13 is an enlarged schematic view of FIG. 12 at N;

fig. 14 is a first isometric view of the plastic encapsulated motor with the insulating sheath mated with the h-shaped lug in accordance with an embodiment of the present invention;

FIG. 15 is an enlarged schematic view of FIG. 14 at Q;

fig. 16 is a perspective view of a front end cover of a plastic package motor according to an embodiment of the present invention.

The reference numerals are represented as:

1. a front end cover; 2. a rear end cap; 3. a stator core; 4. a self-locking structure; 5. mounting holes; 6. a mounting ring; 7. locking the flaps; 8. a locking hole; 9. a wire; 10. h-shaped lugs; 11. winding a bobbin; 12. a top wiring portion; 13. a framework connecting part; 14. an iron core connecting part; 15. an insulating sheath; 16. a sleeve body; 17. a through groove; 18. a rib plate; 19. a first limit groove; 20. bending the plate; 21. a bump; 22. a second limit groove; 23. a guide groove; 24. a plate body; 25. a spring plate; 26. and (7) clamping hooks.

Detailed Description

Referring to fig. 1 to 16 in combination, according to an embodiment of the present invention, a plastic package motor includes a front end cover 1, a stator core 3, a rear end cover 2, and an electric corrosion prevention structure, the electric corrosion prevention structure electrically connects the front end cover 1, the stator core 3, and the rear end cover 2 together, the electric corrosion prevention structure includes a conductive connecting member, a self-locking structure 4 is disposed on the front end cover 1, and the conductive connecting member is locked by the self-locking structure 4 and electrically connected to the front end cover 1.

This electrically conductive connecting piece of plastic envelope motor when realizing electrically conductive being connected between with front end housing 1, realize connecting electrically conductive connecting piece through setting up self-locking structure 4 on front end housing 1, can realize the auto-lock when electrically conductive connecting piece is connected on self-locking structure 4 through self-locking structure 4, thereby prevent that electrically conductive connecting piece from deviating from self-locking structure 4, guarantee the connection reliability between electrically conductive connecting piece and the front end housing 1, make the anti-electrolytic corrosion structural connection of motor more firm, be difficult for droing, effectively improve the bearing of plastic envelope motor and prevent the electro-corrosion function and the EMC performance of motor.

The front end cover 1 is provided with a mounting hole 5, and the self-locking structure 4 is detachably and fixedly arranged in the mounting hole 5. Through setting up mounting hole 5, can go into this mounting hole 5 with auto-lock structure 4 card in, realize the electrically conductive contact between auto-lock structure 4 and the front end housing 1, later insert the front end housing 1 with electrically conductive connecting piece through this mounting hole 5 and auto-lock structure 4 again in, realize the electrically conductive connection to front end housing 1 and electrically conductive connecting piece, simple structure easily realizes.

Self-locking structure 4 includes collar 6, and the inner periphery side of collar 6 is provided with a plurality of locking flaps 7 towards one side convex, is provided with locking hole 8 in the middle of locking flap 7, and the auto-lock is in locking hole 8 department after the electrically conductive connecting piece is worn out from locking hole 8. The diameter of this collar 6 is greater than the diameter of mounting hole 5 for collar 6 can backstop outside mounting hole 5, avoids self-locking structure 4 whole to enter into front end housing 1 in and can't realize effective connection, can play spacing and fixed effect to the installation of self-locking structure 4 on front end housing 1. Preferably, the locking flap 7 forms a frustum shape that protrudes towards one side.

When the self-locking structure 4 is arranged at the mounting hole 5, the locking flap 7 can be contracted under the extrusion action of the mounting hole 5, so that the conductive connecting piece which enters the front end cover 1 after passing through the locking hole 8 formed by the locking flap 7 is locked in the locking hole 8, the protruding direction of the locking flap 7 is consistent with the inserting direction of the conductive connecting piece, therefore, when the conductive connecting piece is inserted into the locking hole 8, the locking flap 7 is opened, the conductive connecting piece can be conveniently inserted, the conductive connecting piece cannot be greatly blocked, when the conductive connecting piece is separated from the locking hole, the locking flap 7 is driven to be retracted under the action of friction, the locking hole 8 is reduced, the conductive connecting piece can be locked, the conductive connecting piece cannot be separated from the locking hole 8, the larger the separating force of the conductive connecting piece is, the larger the locking force of the locking flap 7 is increased, and therefore, the self-locking effect can be effectively, make things convenient for conductive connecting piece to connect, avoid conductive connecting piece to deviate from simultaneously, improve the reliability of being connected between conductive connecting piece and the front end housing 1.

Locking flap 7 is the fan-shaped flap that the slope set up, has the clearance that moves between the adjacent locking flap 7. A movable gap is reserved between the locking flaps 7, so that enough movable space can be reserved between the locking flaps 7, expansion and tightening of the locking hole can be smoothly achieved, and the conductive connecting piece can be clamped into the locking hole and prevented from falling off. The fan-shaped petal has better stress structure and better self-locking performance, and can more effectively prevent the conductive connecting piece from being separated from the locking hole 8.

The shape of locking hole 8 and the shape looks adaptation of electrically conductive connecting piece can realize better cooperation with between the electrically conductive connecting piece, realize better anticreep effect.

The conductive connecting piece is a wire 9, and the relationship between the wire 9 and the self-locking structure 4 and the mounting hole 5 satisfies the following conditions:

d2 is the external diameter of locking lamella 7 at the end of inserting, Dd is the diameter of mounting hole 5, D1 is the external diameter of locking lamella 7 at the root, D is the sinle silk diameter of wire 9, D3 is the diameter of locking hole 8, Dx is the total diameter of wire 9.

Because locking flap 7 is less than the diameter Dd of mounting hole 5 at the external diameter that inserts the tip, consequently make locking flap 7 insert in mounting hole 5 smoothly, the diameter Dd of mounting hole 5 is less than locking flap 7 at the external diameter of root simultaneously, consequently make locking flap 7 insert the root position in mounting hole 5, can exert pressure to locking flap 7 through the inner wall of mounting hole 5, make locking flap 7 can compress tightly on electrically conductive connecting piece, form the anticreep effect to electrically conductive connecting piece. Meanwhile, the diameter of the wire core of the wire 9 is smaller than or equal to that of the locking hole 8, so that the wire core of the wire 9 can smoothly enter the locking hole 8, and when the locking hole 8 contracts, the wire core of the wire 9 is pressed through the locking flaps 7, and the conductive connection between the self-locking structure 4 and the conductive connecting piece is realized. The diameter of the locking hole 8 is smaller than or equal to the total diameter of the lead 9, so that the part of the lead 9 with the wire skin can be prevented from entering the locking hole 8, and the conductive connection between the lead 9 and the locking flap 7 is isolated. The total diameter of the wire 9 is defined as the diameter of the sheath for a single wire, or the total diameter of the sheath portion when a plurality of wires are bundled together.

Preferably, the relationship between the wire 9 and the self-locking structure 4 and the mounting hole 5 further satisfies: D1-Dd > D3-D. The structure stated here is that the difference between the outer diameter of the locking flap 7 at the root and the diameter of the mounting hole 5 is larger than the diameter of the locking hole 8 and the diameter of the core of the wire 9, when the core of the wire 9 is loaded into the locking hole 8, because the diameter of the locking hole 8 is larger than the diameter of the core of the wire 9, when the core just begins to enter into the locking hole, part of the locking flap 7 can enter into the mounting hole 5, the entering depth is suitable that the mounting hole 5 does not extrude the locking flap 7, the core can be directly inserted into the locking hole 8 at the moment, the core can be prevented from being scratched due to the contact of the locking flap 7 and the core, when the core enters into the locking hole 8 for a certain length, the locking flap 7 can be pressed, so that the lower end face of the mounting ring 6 is flush with the position of the mounting hole 5 of the front end cover, at the moment, the locking flap 7 locks the core under the extrusion action of the mounting hole 5, thereby ensuring the self-locking strength of the lead 9.

Preferably, a sector ring segment is further connected between the root of the locking flap 7 and the mounting ring 6, and a plurality of sector ring segments are combined to form a cylindrical segment matched with the mounting hole 5. The root external diameter of locking flap 7 is greater than the diameter of mounting hole 5, and the external diameter of fan ring section is unanimous with the root external diameter of locking flap 7, and the frustum shape structure of locking flap 7 can play effectual guide effect when self-locking structure 4 card is gone into in mounting hole 5 simultaneously, is convenient for carry out the installation of self-locking structure 4 in mounting hole 5.

After the root of locking lamella 7 entered into mounting hole 5 completely, the cylinder section also blocked into mounting hole 5 thereupon this moment, and form the face contact between with mounting hole 5, thereby make self-locking structure 4 can set up firmly in mounting hole 5, because form cylinder hole and cylindrical joint between cylinder section and the mounting hole 5, and have the squeezing action between cylinder and the cylinder hole, consequently can avoid self-locking structure 4 to deviate from in mounting hole 5 effectively, improve self-locking structure 4 connection structure's in mounting hole 5 stability and reliability.

In another embodiment, the anti-galvanic corrosion structure includes an h-shaped tab 10, the h-shaped tab 10 is connected to the stator core 3 in contact, an extended end of the h-shaped tab 10 is in conductive contact with the rear end cap 2, and the conductive connecting member is connected to the h-shaped tab 10 in conductive connection.

This h shape lug 10 is connected between stator core 3 and rear end housing 2, be connected with the electrically conductive connecting piece simultaneously, consequently can utilize the structure of h shape lug 10 self to realize the stable electrically conductive connection between stator core 3 and rear end housing 2, the one end and the rear end housing 2 butt of h shape lug 10, the other end is connected with stator core 3, consequently, can effectively guarantee the electrically conductive connection effect between h shape lug 10 and rear end housing 2 and stator core 3, because the h shape lug card is between rear end housing 2 and stator core 3, consequently, be difficult to deviate from hookup location, the stability and the reliability of preventing the electric erosion structure have been improved, effectively improve the bearing of plastic envelope motor and prevent the electric erosion function and the EMC performance of motor.

A winding frame 11 is fixedly arranged on the stator core 3, an h-shaped wiring piece 10 is fixedly arranged on the winding frame 11, and the bottom of the h-shaped wiring piece 10 is connected with the stator core 3. h shape lug plate 10 is fixed through bobbin 11, and the structure that can make full use of bobbin 11 itself realizes h shape lug plate 10's fixed on the one hand, need not additionally to set up the fixed knot structure of h shape lug plate 10, and on the other hand also need not to reform transform stator core 3's structure for satisfy h shape lug plate 10's fixed requirement, consequently can reduce the processing cost, guarantee that stator core 3 itself has good working property. In addition, the h-shaped lug plate 10 is fixed through the winding frame 11, the structural influence on the motor is minimum, and the working performance of the motor can be guaranteed to the maximum extent.

In this embodiment, the h-shaped tab 10 includes a top terminal portion 12, a frame connecting portion 13 and an iron core connecting portion 14, the h-shaped tab 10 is in conductive contact with the rear end cover 2 through the top terminal portion 12, the frame connecting portion 13 is fixedly connected to the bobbin 11, and the iron core connecting portion 14 is in conductive contact with the stator iron core 3. Through dividing into three part with h shape lug 10, can rationally set for the structure of h shape lug 10 for h shape lug 10 not only can have stable fixed knot and construct, can all realize good electrically conductive contact moreover with between rear end cap 2 and the stator core 3, guarantee to prevent the stability and the reliability of electric erosion structure.

Preferably, the plastic package motor further comprises an insulating sheath 15, the insulating sheath 15 is sleeved outside the h-shaped wiring piece 10, and the top wiring part 12 of the h-shaped wiring piece 10 extends out of the insulating sheath 15. Insulating sheath 15 is fixed to be set up on bobbin 11, can cooperate with bobbin 11, forms more stable fixed knot to h shape lug 10 and constructs, and insulating sheath 15 can form good insulating protection to h shape lug 10 simultaneously, improves the electrical property of h shape lug.

In this embodiment, the insulating sheath 15 includes a sheath body 16 with an opening at one end, a through groove 17 for extending the top wire connecting portion 12 is provided at the top of the sheath body 16, and the frame connecting portion 13 and the core connecting portion 14 are provided in the sheath body 16. Because the one end of insulating sheath 15 is provided with the opening, consequently can make things convenient for h shape lug 10 to pack into insulating sheath 15 from this opening, make things convenient for the installation of h shape lug 10 in insulating sheath 15, because the top of cover body 16 is provided with logical groove 17, consequently when h shape lug 10 from the opening pack into cover body 16 back, the top wiring portion 12 of h shape lug 10 can stretch out from logical groove 17 to on the top end cover 2, realize with the butt contact between the rear end cover 2. Since the h-shaped tab 10 can be integrally snapped into the sheath 16, the h-shaped tab 10 can be protected by the insulating sheath 15.

The iron core connecting part 14 comprises two rib plates 18, a clamping groove is formed between the two rib plates 18, two first limiting grooves 19 matched with the rib plates 18 are formed in the sleeve body 16 towards the inner side wall of the rib plates 18, limiting convex strips are formed between the two first limiting grooves 19, the rib plates 18 are arranged in the first limiting grooves 19, and the limiting convex strips are clamped into the clamping groove. After the h-shaped wiring piece 10 is clamped into the sleeve body 16, the two rib plates 18 of the iron core connecting part 14 are clamped into the two first limiting grooves 19 of the sleeve body 16, and meanwhile, the clamping groove formed between the two rib plates 18 is clamped in the raised line formed between the two first limiting grooves 19, so that the iron core connecting part 14 of the h-shaped wiring piece 10 can be in good positioning fit with one inner side wall of the sleeve body 16, when the insulating sheath 15 is fixed on the winding framework 11, the iron core connecting part 14 can be pressed and fixed on the stator iron core 3 through the fit between the iron core connecting part 14 and the sleeve body 16, and the conductive contact between the iron core connecting part 14 and the stator iron core 3 is realized.

Preferably, the bottoms of the two rib plates 18 are fixedly connected through a bent plate 20, and the bent plate 20 is in conductive contact with the stator core 3. The bottom of the two rib plates 18 is fixedly connected through the bending plate 20, so that the structural strength of the iron core connecting part 14 can be increased, the iron core connecting part 14 is prevented from being poor in matching due to unstable structure when being matched with the sleeve body 16, and the stability of the matching structure of the iron core connecting part and the sleeve body is improved.

Preferably, the bending plate 20 is located below the protruding strip between the two first limiting grooves 19, so that when the insulating sheath 15 is fixed on the bobbin 11, the protruding strip applies pressure to the bending plate 20, and the bending plate 20 is pressed and fixed on the stator core 3, thereby sufficiently foundation is formed between the core connecting portion 14 and the stator core 3, good conductive contact is realized, and reliability is higher.

In this embodiment, a protrusion 21 is disposed at a side of the bottom of the sleeve 16 corresponding to the core connecting portion 14, a second limiting groove 22 is disposed at the bottom of the protrusion 21, and the bending plate 20 is clamped into the second limiting groove 22 and is pressed against the stator core 3 by the insulating sheath 15. The protruding block 21 protrudes from the bottom of the sheath 16, and the bending plate 20 is disposed in the second limiting groove 22, so that the bending plate 20 can be limited by the second limiting groove 22. The thickness of the bending plate 20 is slightly larger than the depth of the second limiting groove 22, so that the bending plate 20 can slightly exceed the second limiting groove 22, when the insulating sheath 15 is fixed on the bobbin 11, the groove wall of the second limiting groove 22 is pressed on the bending plate 20, and the bending plate 20 can be in full contact with the stator core 3.

The bottom surface of the plate 20 of bending and the top surface shape looks adaptation of stator core 3 for can form good face cooperation structure between the plate 20 of bending and the stator core 3, make the bottom of h shape lug 10 can realize switching on with the contact of stator core 3, improve the EMC of motor.

Preferably, the stator core 3 is provided with a concave surface corresponding to the h-shaped lug plate 10, and the h-shaped lug plate 10 extends into the stator core 3 and is in contact connection with the concave surface. Stator core 3 forms the concave surface in the position department of connecting h shape lug 10, then with the length design of h shape lug 10 longer for h shape lug 10 can stretch into stator core 3, makes the contact between stator core 3 and the h shape lug 10 more firm, and the reliability is stronger.

A projection 21 is arranged at one side of the bottom of the sleeve body 16 corresponding to the iron core connecting part 14, and a guide groove 23 for guiding the conductive connecting piece is formed between the projection 21 and the sleeve body 16. The conducting connecting piece is a wire 9, the wire 9 can smoothly flow to the groove of the stator core 3 along the guide groove 23 in the installation process, the operability is stronger, the wire 9 can be prevented from occupying extra wiring space, the structural layout is more reasonable, and the structure is more compact.

The conductive connecting piece and the h-shaped lug plate 10 can be fixedly connected in a welding or riveting mode, and therefore the connection performance between the conductive connecting piece and the h-shaped lug plate is guaranteed.

The frame connecting portion 13 includes a plate body 24, and the plate body 24 is provided with an elastic piece 25 protruding toward the core connecting portion 14. When the insulating sheath 15 is arranged in the sleeve body 16, the elastic sheet 25 can exert an elastic action on the convex strip of the sleeve body 16, so that the framework connecting part 13 and the iron core connecting part 14 can be tightly pressed on two opposite side walls of the sleeve body 16 under the elastic action of the elastic sheet 25, good positioning fit between the sleeve body 16 and the h-shaped wiring piece 10 is realized, relative displacement between the sleeve body 16 and the h-shaped wiring piece 10 in the assembling process is effectively prevented, the accuracy and the reliability of the assembling positions of the sleeve body and the h-shaped wiring piece 10 are ensured, and the stability and the reliability of a matching structure between the h-shaped wiring piece 10 and the rear end cover 2 and the stator iron core 3.

The framework connecting portion 13 comprises a plate body 24, a clamping hook 26 is arranged on the plate body 24, a caulking groove is arranged on the winding framework 11, and the clamping hook 26 is clamped into the caulking groove. This trip 26 cooperatees with bobbin 11, can make in skeleton connecting portion 13 card goes into bobbin 11, and bobbin 11 between form reliable and stable cooperation, guarantee the installation location of skeleton connecting portion 13 in bobbin 11, trip 26 can prevent that skeleton connecting portion 13 from breaking away from bobbin 11.

During assembly, firstly, the h-shaped wiring piece 10 is inserted into a winding framework 11 of the stator assembly, then the lead 9 is fixedly connected to a right-angle exposed part of the h-shaped wiring piece, the insulating sheath is installed on the h-shaped wiring piece 10 connected with the lead 9, the lead 9 is dredged, the other end of the lead 9 is locked with the self-locking structure 4 and the front end cover 1, the lead 9 positioned on the groove part on the outer periphery side of the stator core 3 is pasted and fixed by using gummed paper, then the stator assembly provided with the anti-electrolytic corrosion structure and the front end cover 1 are molded in an injection mode together, the rotor assembly is pressed into the stator assembly, a motor control board is installed, and finally the rear end cover 2 is buckled on the stator assembly, so that the rear end cover 2 is in conductive contact connection with the designed h-shaped wiring piece 10.

It is readily understood by a person skilled in the art that the advantageous ways described above can be freely combined, superimposed without conflict.

The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention. The above is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the technical principle of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. The utility model provides a plastic envelope motor, its characterized in that includes front end housing (1), stator core (3), rear end housing (2) and prevents the electric erosion structure, it will to prevent the electric erosion structure front end housing (1), stator core (3) and rear end housing (2) electrically conductive connection together, it includes electrically conductive connecting piece to prevent the electric erosion structure, be provided with auto-lock structure (4) on front end housing (1), electrically conductive connecting piece passes through auto-lock structure (4) locking to electrically conductive the connection is in on front end housing (1).

2. The plastic package motor according to claim 1, wherein a mounting hole (5) is formed in the front end cover (1), and the self-locking structure (4) is detachably and fixedly arranged in the mounting hole (5).

3. The plastic package motor according to claim 2, wherein the self-locking structure (4) comprises a mounting ring (6), a plurality of locking flaps (7) protruding towards one side are arranged on the inner peripheral side of the mounting ring (6), a locking hole (8) is formed in the middle of each locking flap (7), and the conductive connecting piece penetrates through the locking hole (8) and is self-locked in the locking hole (8).

4. The plastic package motor according to claim 3, wherein the locking flaps (7) are fan-shaped flaps arranged obliquely, and a movable gap is formed between adjacent locking flaps (7).

5. A plastic package motor according to claim 3, wherein the shape of the locking hole (8) is adapted to the shape of the conductive connecting member.

6. The plastic package motor according to claim 3, wherein the conductive connecting member is a wire (9), and a relationship between the wire (9) and the self-locking structure (4) and the mounting hole (5) satisfies:

d2 is the external diameter of locking lamella (7) at the end of inserting end, Dd is the diameter of mounting hole (5), D1 is the external diameter of locking lamella (7) at the root, D is the core diameter of wire (9), D3 is the diameter of locking hole (8), Dx is the total diameter of wire (9).

7. The plastic package motor according to claim 6, wherein the relationship between the lead (9) and the self-locking structure (4) and the mounting hole (5) further satisfies: D1-Dd > D3-D.

8. The plastic package motor according to claim 3, wherein sector ring segments are further connected between the root portions of the locking flaps (7) and the mounting ring (6), and the sector ring segments are combined to form a cylindrical segment matched with the mounting hole (5).

9. The plastic package motor according to any one of claims 1 to 8, wherein the electric corrosion prevention structure further comprises an h-shaped lug (10), the h-shaped lug (10) is in contact connection with the stator core (3), an extending end of the h-shaped lug (10) is in conductive contact with the rear end cover (2), and the conductive connecting piece is in conductive connection with the h-shaped lug (10).

10. The plastic package motor according to claim 9, wherein a bobbin (11) is fixedly disposed on the stator core (3), the h-shaped lug (10) is fixedly disposed on the bobbin (11), and the bottom of the h-shaped lug (10) is connected to the stator core (3).

11. The plastic package motor according to claim 10, wherein the h-shaped wiring lug (10) comprises a top end wiring portion (12), a framework connecting portion (13) and an iron core connecting portion (14), the h-shaped wiring lug (10) is in conductive contact with the rear end cover (2) through the top end wiring portion (12), the framework connecting portion (13) is fixedly connected to the winding framework (11), and the iron core connecting portion (14) is in conductive contact with the stator iron core (3).

12. The plastic package motor according to claim 11, further comprising an insulating sheath (15), wherein the insulating sheath (15) is sleeved outside the h-shaped wiring piece (10), and the top wiring portion (12) of the h-shaped wiring piece (10) extends out of the insulating sheath (15).

13. The plastic package motor according to claim 12, wherein the insulating sheath (15) comprises a sheath body (16) with an opening at one end, a through groove (17) for the top terminal connection portion (12) to extend out is formed at the top of the sheath body (16), and the skeleton connection portion (13) and the core connection portion (14) are disposed in the sheath body (16).

14. The plastic package motor according to claim 13, wherein the core connecting portion (14) comprises two rib plates (18), a clamping groove is formed between the two rib plates (18), two first limiting grooves (19) matched with the rib plates (18) are formed in the inner side wall of the sleeve body (16) facing the rib plates (18), a limiting convex strip is formed between the two first limiting grooves (19), the rib plates (18) are arranged in the first limiting grooves (19), and the limiting convex strip is clamped into the clamping groove.

15. The plastic package motor according to claim 14, wherein the bottoms of the two rib plates (18) are fixedly connected through a bending plate (20), and the bending plate (20) is in conductive contact with the stator core (3).

16. The plastic package motor according to claim 15, wherein a protrusion (21) is disposed at a side of the bottom of the sleeve body (16) corresponding to the core connecting portion (14), a second limiting groove (22) is disposed at a bottom of the protrusion (21), and the bending plate (20) is clamped into the second limiting groove (22) and is pressed against the stator core (3) by the insulating sheath (15).

17. The plastic package motor according to claim 13, wherein a protrusion (21) is disposed at a side of the bottom of the sleeve body (16) corresponding to the core connecting portion (14), and a guide groove (23) for guiding the conductive connecting member is formed between the protrusion (21) and the sleeve body (16).

18. The plastic package motor according to claim 11, wherein the frame connecting portion (13) comprises a plate body (24), and the plate body (24) is provided with a spring plate (25) protruding towards the core connecting portion (14).

19. The plastic package motor according to claim 11, wherein the frame connecting portion (13) comprises a plate body (24), a hook (26) is disposed on the plate body (24), a caulking groove is disposed on the winding frame (11), and the hook (26) is clamped into the caulking groove.

20. The plastic package motor according to claim 9, wherein a concave surface is disposed on the stator core (3) corresponding to the h-shaped lug plate (10), and the h-shaped lug plate (10) extends into the stator core (3) and is in contact connection with the concave surface.