CN220711187U

CN220711187U - Improved motor rotor with integrated injection molding and encapsulation of insulating sheet

Info

Publication number: CN220711187U
Application number: CN202321066982.5U
Authority: CN
Inventors: 叶会荣; 陈志旺
Original assignee: Dongguan Rongji Electronic Technology Co ltd
Current assignee: Dongguan Rongji Electronic Technology Co ltd
Priority date: 2023-05-06
Filing date: 2023-05-06
Publication date: 2024-04-02
Anticipated expiration: 2033-05-06

Abstract

The utility model relates to the technical field of motor rotor assembly insulating sheets, in particular to an improved motor rotor integrated with an insulating sheet through injection molding and encapsulation. The metal part is also provided with an insulating end part, an insulating groove part and an insulating shaft part, wherein the insulating end part covers the two ends of the metal part; the insulating groove part covers the inner wall of the metal part winding groove; the insulating shaft part is abutted against the inner wall of the rotor shaft seat, so that the part of the metal part, which is in contact with the enameled wire or the rotating shaft, is insulated. Finally, through the improvement, all parts of the metal part formed by the rotor punching sheet, which are contacted with the conductive coil, have insulating properties, so that the condition of poor functions of a motor product caused by the damage of the enameled wire is reduced, and the reject ratio of the product is further reduced.

Description

Improved motor rotor with integrated injection molding and encapsulation of insulating sheet

Technical Field

The utility model relates to the technical field of motor rotor assembly insulating sheets, in particular to an improved motor rotor with an integrated injection molding and encapsulation insulating sheet.

Background

An electric motor (commonly called as a "motor") is an electromagnetic device for converting or transmitting electric energy according to an electromagnetic induction law, and the working principle is that an energizing coil is forced to rotate in a magnetic field so as to drive a rotor to rotate.

The motor is internally provided with a stator, a rotor and a rotating shaft, wherein the stator is positioned around the rotor to surround the rotor. The rotor is used for being matched with the stator, and under the condition of electrifying, torque is generated between the rotor and the stator through electromagnetic induction, so that the rotor is driven to rotate, and the rotating shaft is driven to rotate.

The rotor is generally formed by laminating rotor punching sheets, and winding grooves for winding conductive coils are formed in the rotor punching sheets along the circumferential direction; the two ends of the rotor are provided with insulating frames for insulation. At present, the rotor insulating frames are only positioned at two ends of the rotor, and in some small motors, the conductive coils are usually wound by using enameled wires, if the insulating paint of the enameled wires is damaged, the enameled wires are easy to form electrical contact with a rotor punching sheet, so that motor products are disqualified or faults are easy to occur in use.

The Chinese patent with publication number CN207304192U discloses an improved structure of a rotor of a direct current motor, which comprises a main shaft and a rotor punching sheet assembly arranged on the main shaft, and is characterized in that the rotor punching sheet assembly is formed by superposing 28 rotor punching sheets, the rotor punching sheet comprises a cylindrical tooth root, three polar arcs which are uniformly arranged along the tooth root and are connected with the tooth root through polar shafts, and an open winding slot is formed between the two polar arcs and the tooth root. And an armature insulation assembly is arranged on the main shaft, is positioned at one end of the punching sheet assembly and is buckled on the punching sheet assembly.

As described in the above patent, the armature insulation assemblies can only be fastened at two ends of the punching sheet assembly, and other parts on the punching sheet assembly are not protected, so that the motor product is easy to be damaged by the enameled wire to cause poor functions.

Therefore, the technical problems to be solved are: how to provide a motor rotor of integrative of modified insulating sheet injection molding rubber coating, make all positions that the metal part that rotor punching constitutes contacted with conductive coil possess insulating properties to reduce the enameled wire damage and lead to motor product function failure's condition, and then reduce the defective rate of product.

Disclosure of Invention

The utility model aims to overcome the defects of the prior art and provides a technical scheme capable of solving the problems.

The utility model provides an improved motor rotor integrated with an insulating sheet and injection molding and encapsulation, which comprises a metal part and an insulating part, wherein the metal part is used for winding a conductive coil, and the insulating part is isolated between the metal part and the conductive coil, so that the conductive coil is prevented from contacting the metal part to cause faults.

As a further scheme of the utility model: the metal part is provided with a plurality of rotor punching sheets, the rotor punching sheets are overlapped and combined with each other to form the metal part, the whole shape of the metal part is a cylinder, and the outer circumferential surface of the metal part of the cylinder is not covered by the insulating part.

As a further scheme of the utility model: the two ends of the metal part in the axial direction of the metal part are respectively covered with the insulating part, and one end of the insulating part is provided with a shaft sleeve which is sleeved on a motor shaft; the other end of the insulating part is provided with a driving groove which is used for outputting rotary power.

As a further scheme of the utility model: the rotor punching sheet is provided with a circular tooth seat and T-shaped radial teeth, one end of each T-shaped radial tooth is provided with an arc tooth top, the other end of each T-shaped radial tooth is provided with a straight tooth column, and the straight tooth columns are fixedly connected to the circular tooth seat.

As a further scheme of the utility model: arc tooth tops on a plurality of rotor punching sheets are combined into a polar arc area of the metal part, and the outer peripheral surface of the polar arc area is not covered by the insulating part; the inner peripheral surface of the polar arc region is provided to be covered with the insulating member.

As a further scheme of the utility model: the straight tooth columns on the plurality of rotor punching sheets are combined into a rotor shaft column of a metal part, and two side surfaces of the rotor shaft column are respectively covered by the insulating part.

As a further scheme of the utility model: the circular tooth seats on the plurality of rotor punching sheets are combined into a rotor shaft seat of a metal part, and the outer circumferential surface of the rotor shaft seat is covered by the insulating part.

As a further scheme of the utility model: the circular tooth holder is provided with a central through hole and a limiting notch, the central through holes on the plurality of rotor punching sheets are combined to form a rotor shaft hole on the metal part, the limiting notches on the plurality of rotor punching sheets are combined to form a rotor notch on the metal part, the rotor shaft hole and the rotor notch form the inner wall of the rotor shaft seat, and the inner wall of the rotor shaft seat is covered by the insulating part.

As a further scheme of the utility model: the insulating part is provided with an insulating end part, an insulating groove part and an insulating shaft part, and the insulating end part covers the two ends of the metal part; the metal part is provided with a winding groove, and the insulating groove part covers the inner wall of the winding groove; the insulating shaft part is abutted against the inner wall of the rotor shaft seat.

As a further scheme of the utility model: the insulating part is integrally formed by injection molding.

Compared with the prior art, the utility model has the beneficial effects that:

1. through set up injection molding's insulating part between the metal part with the conductive coil to realize the totally insulated enclosure to motor rotor, effectively avoid the conductive coil to warp the outstanding motor trouble that causes, thereby reduce the motor and appear the condition of functional failure, reduce the defective rate of product.

2. In addition, by providing an insulating end portion, an insulating groove portion and an insulating shaft portion, the insulating end portion is covered at both ends of the metal member; the insulating groove part covers the inner wall of the metal part winding groove; the insulation shaft part is abutted on the inner wall of the rotor shaft seat, so that all parts of the metal part, which are in contact with the enameled wire or the rotating shaft, are insulated, and motor faults caused by short circuit of the conductive coil can be avoided.

Therefore, through the improvement, all parts of the metal part formed by the rotor punching sheet, which are contacted with the conductive coil, have insulating properties, so that the condition that the motor product is poor in function due to the damage of the enameled wire is reduced, and the reject ratio of the product is reduced.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the utility model, and that other drawings can be obtained according to these drawings without inventive faculty for a person skilled in the art.

FIG. 1 is a schematic view of the overall structure of a motor rotor of the present utility model;

FIG. 2 is a schematic cross-sectional view of an insulating member of the present utility model;

FIG. 3 is a schematic view of the structure of a rotor sheet of the present utility model;

FIG. 4 is a schematic view of the structure of the magnetism isolating opening of the present utility model;

fig. 5 is a schematic structural view of a first embodiment of the present utility model;

FIG. 6 is a schematic structural view of a second embodiment of the present utility model;

fig. 7 is a schematic structural view of a third embodiment of the present utility model;

fig. 8 is a schematic structural view of a fourth embodiment of the present utility model.

Reference numerals and names in the drawings are as follows:

10 a metal part; 11 wiring grooves; a 20 polar arc region; 21 polar arc outer peripheral surface; 22 polar arc inner peripheral surface; 23 rotor shaft posts; 24 rotor shaft seats; 25 rotor shaft holes; 26 rotor gap; 30 rotor punching sheets; 31 T-shaped radial teeth; 32 arc tooth tops; 33 straight tooth columns; 34 round tooth holder; 35 a central through hole; 36 limit gaps; 37 magnetism isolating openings; 40 insulating members; 41 insulating the ends; 42 insulating groove portions; 43 insulating shaft portions; 44 sleeves; 45 drive the slot.

Detailed Description

The following description of the technical solutions in the embodiments of the present utility model will be clear and complete, and it is obvious that the described embodiments are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1 to 8, in an embodiment of the present utility model, an improved motor rotor with an integrally injection-molded and encapsulated insulation sheet includes a metal part 10 and an insulation part 40, wherein the metal part 10 is used for winding a conductive coil (not shown), and the insulation part 40 is isolated between the metal part 10 and the conductive coil, so as to avoid the conductive coil contacting the metal part 10 to cause a fault.

Specifically, the conventional motor rotor is a rotor of a metal part and an insulating sheet of an insulating part are separate elements, two insulating sheets are required to be additionally arranged at two ends of one group of rotors, the adding step is time-consuming and labor-consuming, and particularly, the mounting of a small motor rotor is more labor-consuming. In addition, the middle part of the rotor punching sheet 30 of the rotor component formed by the multi-layer rotor punching sheet 30 of the traditional motor rotor does not reach the insulation degree, if the conductive coil fails, deformation protrusions are generated, namely, the conductive risk is possibly generated with the metal rotor component, so that the motor rotor fails.

Therefore, preferably, the insulating part 40 is integrally formed by injection molding or injection molding and encapsulation, and the integral injection molding and encapsulation can be performed by integrally placing the metal part 10 into an injection mold, so that the steps of separately installing the insulating components at two ends of the metal part 10 are reduced, the production flow is further accelerated, the production benefit is improved, and the cost of manpower and material resources for separately installing the insulating components can be saved.

In addition, the motor rotor of the utility model is integrally molded by integral injection molding and encapsulation, so that the rotor product does not need to be additionally provided with an insulating part 40; and the part of the rotor product, which is contacted with the conductive coil, is completely insulated and sealed, so that motor faults caused by coil protrusions are effectively avoided, the functional defects of the motor rotor during use can be correspondingly reduced, and the reject ratio of the motor rotor during production can be reduced.

As shown in fig. 1 to 3, it is preferable that the metal member 10 is provided with a plurality of rotor chips 30, the plurality of rotor chips 30 are overlapped with each other to be combined into the metal member 10, the entire shape of the metal member 10 is formed as a cylinder, and the outer circumferential surface of the metal member 10 of the cylinder is not covered with the insulating member 40.

Specifically, the motor rotor may be formed by combining rotor sheets 30 with various specifications, wherein the number of the rotor sheets 30 overlapped, preferably 3 sheets to 30 sheets, may be changed according to the specific product requirement. In addition, it will be appreciated that in order for the rotor member to pass through the magnetic force normally, it is preferable that the outer circumferential surface of the metal member 10 is not covered with the insulating member 40, so that the magnetic force exchange can be performed normally.

As shown in fig. 1 and 5, preferably, both ends of the metal member 10 in the axial direction thereof cover the insulating member 40, respectively, and one end of the insulating member 40 is provided with a bushing 44 for being sleeved on a motor shaft; the other end of the insulating member 40 is provided with a driving groove 45, and the driving groove 45 is used for outputting rotational power.

Specifically, the two ends of the metal part 10 may be covered by the insulating part 40, so that a corresponding shaft sleeve 44 and a driving groove 45 may be further provided on the insulating part 40, the shaft sleeve 44 is used for sleeving on a motor shaft, and the driving groove 45 is used for outputting the rotation of the rotor part to an external device for use.

As shown in fig. 3, preferably, the rotor punching sheet 30 is provided with a circular tooth holder 34 and T-shaped radial teeth 31, one end of the T-shaped radial teeth 31 is provided with an arc tooth top 32, the other end of the T-shaped radial teeth 31 is provided with a straight tooth post 33, and the straight tooth post 33 is fixedly connected to the circular tooth holder 34.

Specifically, as shown in the figure, three T-shaped radial teeth 31 are provided and are uniformly spaced from each other on the circular tooth holder 34. It will be appreciated that a different number of T-shaped radial teeth 31 may be provided, all evenly spaced from one another on the circular tooth holder 34, depending on the particular parameters of the product. In addition, a magnetism isolating opening 37 is arranged between the two T-shaped radial teeth 31, and the magnetism isolating opening 37 is used for isolating magnetism of different coils.

As shown in fig. 2, preferably, the arcuate tooth tips 32 on the plurality of rotor blades 30 are combined into a polar arc region 20 of the metal member 10, and the polar arc outer peripheral surface 21 of the polar arc region 20 is provided so as not to be covered by the insulating member 40; the inner peripheral surface of the polar arc region 20 is provided so as to be covered with the insulating member 40. The straight tooth studs 33 on the plurality of rotor sheets 30 are combined into a rotor stud 23 of the metal part 10, and both side surfaces of the rotor stud 23 are respectively arranged to be covered by the insulating part 40. The circular tooth seats 34 on the plurality of rotor punching sheets 30 are combined into the rotor shaft seat 24 of the metal part 10, and the outer circumferential surface of the rotor shaft seat 24 is covered by the insulating part 40.

Specifically, since the conductive coil is wound around the rotor shaft post 23, the entire rotor shaft post 23 needs to be wrapped around the insulating member 40, and the inner peripheral surface of the pole arc region 20 is also in contact with the conductive coil, so that it is preferable that the insulating member 40 is also provided to cover. The outer circumferential surface of the rotor shaft seat 24 is also in contact with the conductive coil, so that it is preferable that the insulating member 40 is also provided to cover.

As shown in fig. 2 and 3, preferably, the circular tooth holder 34 is provided with a central through hole 35 and a limiting notch 36, the central through holes 35 on the plurality of rotor punching sheets 30 are combined into a rotor shaft hole 25 on the metal part 10, the limiting notches 36 on the plurality of rotor punching sheets 30 are combined into a rotor notch 26 on the metal part 10, the rotor shaft hole 25 and the rotor notch 26 form an inner wall of the rotor shaft seat 24, and the inner wall of the rotor shaft seat 24 is covered by the insulating part 40.

Specifically, the rotor shaft seat 24 is mainly used for passing through the motor shaft, so in order to avoid electric leakage caused by contact between the rotor punching sheet 30 on the metal component 10 and the motor shaft made of metal, the insulating component 40 needs to be disposed on the inner wall of the rotor shaft seat 24 for covering.

As shown in fig. 2, the insulating member 40 is preferably provided with an insulating end portion 41, an insulating groove portion 42, and an insulating shaft portion 43, and the insulating end portion 41 is preferably covered on both ends of the metal member 10; the metal part 10 is provided with a winding groove 11, and the insulating groove part 42 covers the inner wall of the winding groove 11; the insulating shaft 43 abuts against the inner wall of the rotor shaft seat 24.

Specifically, the insulating end portions 41 are preferably provided at both ends of the metal member 10 of the motor so as to insulate both ends. The insulation groove 42 abuts against the rotor shaft post 23, the rotor shaft seat 24, and the pole arc inner circumferential surface 22, thereby insulating the winding groove 11. The insulating shaft portion 43 is a portion penetrating the rotor shaft hole 25, and is mainly provided to insulate the inner wall of the rotor shaft seat 24.

In the present utility model, the motor rotor is preferably applied to a motor rotor having a diameter of 3.00mm to 50.00 mm. Wherein the thickness of the single rotor sheet 30 is preferably 0.1-3mm thick rotor sheet 30. The number of the rotor punching sheets 30 in the motor rotor is preferably 3-30 rotor punching sheets 30 which are combined to form an injection molding integrated motor rotor.

In the first embodiment, as shown in fig. 5, the metal part 10 is preferably formed by using 10 pieces of rotor punching sheet 30, and the insulating part 40 is covered on a portion of the metal part 10 which may contact with the conductive coil or other metal parts 10 through an integrally formed injection molding encapsulation process. So that the motor rotor does not need to be additionally provided with an insulating member 40; and the motor rotor can realize the complete insulation and sealing of the part of the rotor product which is possibly abnormally conductive, thereby effectively avoiding motor faults caused by poor contact, correspondingly reducing the functional defects of the motor rotor during use and reducing the defective rate of the motor rotor during production.

As shown in fig. 6, in the second embodiment, the metal part 10 is composed of 12 rotor sheets 30 unlike the first embodiment, and other structures are the same as the first embodiment.

As shown in fig. 7, in the third embodiment, the metal part 10 is composed of 17 pieces of rotor chips 30 unlike the first embodiment, and other structures are the same as the first embodiment.

As shown in fig. 8, in the fourth embodiment, the metal part 10 is composed of 18 rotor chips 30 unlike the first embodiment, and other structures are the same as the first embodiment.

When the rotor punching sheet is used, the rotor punching sheets 30 of the quantity required by corresponding products are overlapped firstly, and then the overlapped rotor punching sheets 30 are put into an injection mold to be integrally molded and encapsulated by injection molding, so that all parts of the rotor punching sheets 30, which need to be covered by the insulating part 40, are covered at one time, and the insulating sheets do not need to be independently installed.

The motor rotor, which has been covered with the insulating member 40, is then removed from the injection mold and subjected to a corresponding demolding operation, and the motor rotor can then be packaged for sale. Or the motor rotor with the insulating part 40 is assembled, corresponding conductive coils are wound, and corresponding motor shafts and motor covers are installed, so that the motor finished product is assembled for sale.

Therefore, through the improvement, all parts of the metal part 10 formed by the rotor punching sheet 30, which are contacted with the conductive coil, have insulating properties, so that the condition that the motor product is poor in function due to the damage of the enameled wire is reduced, and the reject ratio of the product is reduced.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Claims

1. An improved motor rotor integrated with an insulating sheet and injection-molded and encapsulated comprises a metal part (10) and an insulating part (40), and is characterized in that the metal part (10) is used for winding a conductive coil, the insulating part (40) is isolated between the metal part (10) and the conductive coil, and the insulating part (40) formed by injection molding is arranged between the metal part (10) and the conductive coil, so that the conductive coil is prevented from contacting the metal part (10) to cause faults.

2. An improved injection molded and encapsulated motor rotor as claimed in claim 1, wherein said metal member (10) is provided with a plurality of rotor laminations (30), said plurality of rotor laminations (30) being overlapped with each other to form said metal member (10), said metal member (10) being formed in a cylindrical shape as a whole, said cylindrical metal member (10) being provided on an outer circumferential surface thereof not covered by said insulating member (40).

3. An improved motor rotor with integrated insulation sheet injection molding and encapsulation according to claim 1, wherein the metal parts (10) cover the insulation parts (40) at both axial ends thereof, and one end of the insulation parts (40) is provided with a shaft sleeve (44) for sleeving on a motor shaft; the other end of the insulating member (40) is provided with a driving groove (45), and the driving groove (45) is used for outputting rotary power.

4. An improved injection molding and encapsulation integrated motor rotor of an insulating sheet according to claim 2, characterized in that the rotor punching sheet (30) is provided with a circular tooth holder (34) and T-shaped radial teeth (31), one end of the T-shaped radial teeth (31) is provided with an arc tooth top (32), the other end of the T-shaped radial teeth (31) is provided with a straight tooth post (33), and the straight tooth post (33) is fixedly connected to the circular tooth holder (34).

5. An improved insulation sheet injection molded and encapsulated integrated motor rotor as in claim 4 wherein the arcuate tooth tops (32) on a plurality of rotor laminations (30) are combined into a polar arc region (20) of the metal part (10), said polar arc region (20) being provided on the outer peripheral surface thereof uncovered by said insulation part (40); the inner peripheral surface of the polar arc region (20) is provided so as to be covered with the insulating member (40).

6. An improved insulation sheet injection molded and encapsulated integrated motor rotor according to claim 4, characterized in that the straight tooth posts (33) on the multiple rotor sheets (30) are combined into a rotor post (23) of the metal part (10), and both sides of the rotor post (23) are respectively arranged to be covered by the insulation part (40).

7. An improved insulation sheet injection molded and encapsulated integrated motor rotor as in claim 4, wherein the circular tooth holder (34) on the plurality of rotor punching sheets (30) is combined into a rotor shaft seat (24) of the metal part (10), and the outer circumferential surface of the rotor shaft seat (24) is covered by the insulation part (40).

8. The improved motor rotor with integrated insulation sheet injection molding and encapsulation according to claim 7, wherein the circular tooth holder (34) is provided with a central through hole (35) and a limit notch (36), the central through holes (35) on the plurality of rotor punching sheets (30) are combined into a rotor shaft hole (25) on the metal part (10), the limit notch (36) on the plurality of rotor punching sheets (30) are combined into a rotor notch (26) on the metal part (10), the rotor shaft hole (25) and the rotor notch (26) form an inner wall of the rotor shaft seat (24), and the inner wall of the rotor shaft seat (24) is covered by the insulation part (40).

9. An improved injection molded and encapsulated motor rotor as claimed in claim 7, wherein said insulating member (40) is provided with an insulating end portion (41), an insulating groove portion (42) and an insulating shaft portion (43), said insulating end portion (41) being capped at both ends of the metal member (10); the metal part (10) is provided with a winding groove (11), and the insulating groove part (42) covers the inner wall of the winding groove (11); the insulating shaft portion (43) is abutted against the inner wall of the rotor shaft seat (24).