CN212137492U

CN212137492U - Rubber-coated meson, armature structure and motor

Info

Publication number: CN212137492U
Application number: CN202020962916.6U
Authority: CN
Inventors: 林涛; 李明良
Original assignee: Ccl Manufacturjng Shenzhen Ltd
Current assignee: Ccl Manufacturjng Shenzhen Ltd
Priority date: 2020-05-29
Filing date: 2020-05-29
Publication date: 2020-12-11
Anticipated expiration: 2030-05-29

Abstract

The utility model belongs to the technical field of the motor, especially, relate to a rubber coating meson, armature structure and motor, rubber coating meson include metal meson and insulating part, and the metal meson includes the grafting ring and encloses the barrier ring of locating the ring periphery that cup joints, cup joints the ring and is used for the cover to locate on the armature shaft in order to block oil towards the commutator infiltration, and the insulating part wraps up in the surface of barrier ring and is used for blockking the copper bar and the metal meson electrical contact of commutator. The periphery of the stop ring is directly wrapped with the insulating part, so that when the commutator is installed, the creepage distance between the copper bar of the commutator and the armature shaft is greatly increased, and the problem of reduction of the insulation and voltage resistance caused by adhesion of a conductive substance is effectively solved; and, form one through directly setting up the insulating part on the metal meson the utility model discloses a rubber coating meson has grease proofing and insulating function simultaneously, so when the motor assembly, only need install one the utility model discloses a rubber coating meson can, reduced one equipment process, promoted assembly efficiency.

Description

Rubber-coated meson, armature structure and motor

Technical Field

The utility model belongs to the technical field of the motor, especially, relate to a rubber coating meson, armature structure and motor.

Background

In the permanent magnet direct current brush motor, an oil-proof meson is required to be added at the end part of the commutator 40A on the armature shaft 30A to prevent bearing oil from seeping into a groove between copper bars 41A of the commutator 40A, and carbon powder is attached to the surface of oil after the oil seeps into the groove of the commutator 40A, so that the creepage distance between two adjacent copper bars 41A (which is the shortest path between two conductive parts or between a conductive part and an equipment protection interface measured along an insulating surface) is reduced, and finally the armature shaft 30A of the motor is short-circuited and burns down the motor.

As shown in fig. 4, the conventional oil-proof meson generally comprises a metal oil-proof meson 60 and an insulating meson 70, wherein the metal oil-proof meson 60 is sleeved on the upper pivot 30A and is in interference connection with the upper pivot 30A for blocking oil, and the insulating meson 70 is sleeved on the upper pivot 30A and is located between the commutator 40A and the metal oil-proof meson 60 for preventing the metal oil-proof meson 60 from being in electrical contact with the copper bar 41A of the commutator 40A. However, after the conductive substance is attached to the surface of the insulating medium 70, the leakage failure of the motor is easily caused, and the insulation and high voltage resistance of the motor are deteriorated even if the leakage failure is not caused.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a rubber coating meson, armature structure and motor, the creepage distance between copper bar to the metal meson that aims at solving the commutator among the prior art is on the small side, leads to the technical problem of motor electric leakage easily.

In order to achieve the above object, the utility model adopts the following technical scheme: the rubber-coated meson comprises a metal meson and an insulating piece, wherein the metal meson comprises a sleeving ring and a blocking ring arranged on the periphery of the sleeving ring in a surrounding mode, the sleeving ring is used for being sleeved on an armature shaft to block oil from permeating towards a commutator, and the insulating piece is wrapped on the outer surface of the blocking ring and used for blocking a copper bar of the commutator from being in electric contact with the metal meson.

Optionally, the insulating member is formed by injecting a plastic material on an outer surface of the blocking ring.

Optionally, the insulation member is formed by injection molding of a liquid crystal polymer, polyamide, polybutylene terephthalate, polyethylene terephthalate, poly-p-phenylene terephthalamide, or polyphenylene sulfide on the outer surface of the barrier ring.

Optionally, the blocking ring has an end face located away from the collar ring and a side face located between the end face and the collar ring, and at least one notch is provided on the end face and/or the side face.

Optionally, the indentation extends from the end face towards the socket ring.

Optionally, the notch penetrates through the side surface in the axial direction of the metal meson.

Optionally, the notch is located on at least one of the side faces or extends between the two side faces.

Optionally, at least one end of the collar ring protrudes from a side surface of the blocking ring along a central axis direction of the collar ring.

Optionally, the insulating part includes two facing structures and outer ring structure that the interval set up, two the periphery of facing structure all with outer ring structure is connected, two facing structure with outer ring structure encloses jointly and establishes and is used for installing the installing zone of barrier ring, outer ring structure orientation one of them side protrusion setting of facing structure.

Optionally, the outer surface of the insulating member is provided with at least one annular groove around the periphery of the coupling ring.

The embodiment of the utility model provides a beneficial effect of rubber coating meson: compared with the prior art, the rubber-coated meson of the utility model directly wraps the insulating part at the periphery of the stop ring, so that a creepage distance is formed between the copper bar of the commutator and the position of the butt on one side of the insulating part and the other side of the insulating part, the creepage distance is a + b + c, the creepage distance is greatly increased, the problem of reduction of the insulation pressure resistance caused by the adhesion of a conductive substance is effectively solved, and the use effect is good; and, form one through directly setting up the insulating part on the metal meson the utility model discloses the rubber coating meson of embodiment has grease proofing and insulating function simultaneously, so when the motor assembly, only need install one the utility model discloses the rubber coating meson of embodiment can, for the equipment of motor has reduced one process, has promoted assembly efficiency effectively.

The embodiment of the utility model provides another technical scheme: an armature structure comprises an armature shaft, a commutator and the rubber-coated meson, wherein the commutator is arranged on the armature shaft, the sleeve ring is sleeved on the armature shaft and is in interference connection with the armature shaft, the sleeve ring is positioned at the end part of the commutator, and a copper bar of the commutator is abutted against the insulating part.

According to the armature structure provided by the embodiment of the utility model, due to the use of the rubber-coated meson, the sleeve ring is in interference connection with the armature shaft, so that the bearing oil is blocked from permeating towards the commutator; then because the copper bar of commutator is located one side of insulating part, form creepage distance from the position of the copper bar of commutator and one side butt of insulating part to being located between the opposite side of insulating part like this, its creepage distance is a + b + c, creepage distance increases greatly, has solved the problem that the insulating withstand voltage ability that brings because of the conductive material adhesion descends effectively, excellent in use effect.

The embodiment of the utility model provides a further technical scheme: an electric machine comprises the armature structure.

The utility model discloses motor owing to use has foretell armature structure, at the in-process that uses, can prevent effectively that armature shaft and copperbar from forming the electrical contact to prevent the motor short circuit, it is safe in utilization.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.

Fig. 1 is a schematic structural diagram of an armature structure according to an embodiment of the present invention;

FIG. 2 is an exploded view of the armature structure of FIG. 1;

FIG. 3 is a schematic view of the partial cross-sectional structure of FIG. 1;

FIG. 4 is a partial cross-sectional structural schematic view of a prior art armature construction;

FIG. 5 is a schematic structural diagram of one embodiment of the metal meson in FIG. 2;

FIG. 6 is a schematic structural diagram of another embodiment of the metal meson in FIG. 2;

FIG. 7 is a schematic structural diagram of another embodiment of the metal meson in FIG. 2;

FIG. 8 is a schematic structural diagram of another embodiment of the metal meson in FIG. 2;

fig. 9 is a schematic structural diagram of an encapsulated meson according to an embodiment of the present invention;

FIG. 10 is a schematic cross-sectional view of FIG. 9;

fig. 11 is a schematic structural diagram of an encapsulated meson according to an embodiment of the present invention;

FIG. 12 is a schematic cross-sectional view of FIG. 11;

fig. 13 is a schematic structural diagram of another embodiment of the encapsulated meson according to an embodiment of the present invention;

FIG. 14 is a schematic cross-sectional view of FIG. 13;

fig. 15 is a schematic structural diagram of another embodiment of the encapsulated meson according to an embodiment of the present invention;

fig. 16 is a schematic cross-sectional view of fig. 15.

Wherein, in the figures, the respective reference numerals:

10-metal meson; 11-a socket ring; 12-a blocking ring; 121-end face; 122-side; 123-a notch; 20-an insulating member; 21-veneering structure; 22-outer ring structure; 211-annular groove; 30-armature shaft; 40, a commutator; 41-copper bar; 50-an auxiliary metal meson; 60-metal oil repellants; 70-insulating meson.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to fig. 1-16 are exemplary and intended to be used to illustrate the present invention, but should not be construed as limiting the invention.

In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

As shown in fig. 4, the conventional oil-proof meson includes a metal oil-proof meson 60, an insulating meson 70 and an auxiliary metal meson 50A, and the metal oil-proof meson 60 is connected to the insulating meson 70, so that the creepage distance (indicated by the thick line in the figure) between the copper bar 41A of the commutator 40A and the metal oil-proof meson 60 is small, and the creepage distance is d + f, and after a conductive substance is attached to the surface of the insulating meson 70, the leakage failure of the motor is easily caused, and even if the failure is not caused, the insulation and high voltage resistance of the motor are also deteriorated.

As shown in fig. 3, 9 and 10, the encapsulated meson provided by the embodiment of the present invention will now be described. The rubber-coated meson comprises a metal meson 10 and an insulating piece 20, wherein the metal meson 10 comprises a sleeving ring 11 and a blocking ring 12 arranged around the circumference of the sleeving ring 11, the sleeving ring 11 is used for sleeving the armature shaft 30 to block oil from permeating towards the commutator 40, and the insulating piece 20 is wrapped on the outer surface of the blocking ring 12 and used for blocking a copper bar 41 of the commutator 40 from being in electrical contact with the metal meson 10.

Compared with the prior art, the rubber-coated meson provided by the embodiment of the utility model, through at the periphery of barrier ring 12 direct parcel insulating part 20, form creepage distance (adding thick line and showing in the figure) between the position of copper bar 41 of commutator 40 and one side butt of insulating part 20 begins to lie in the opposite side of insulating part 20 like this, be respectively by insulating part 20 keep away from commutator 40 one side along the first creepage route a of radially outwards extending, by insulating part 20 between the both sides distance second creepage route b, by insulating part 20 near commutator 40 one side tip to copper bar along the radially inwards extending third creepage route c, creepage distance sum is a + b + c, creepage distance greatly increased, the problem of the insulating withstand voltage decline that has solved effectively because of the conducting material adhesion, excellent in use effect; and, form one through directly setting up insulating part 20 on metal meson 10 the utility model discloses the rubber coating meson of embodiment has grease proofing and insulating function simultaneously, so when the motor assembly, only need install one the utility model discloses the rubber coating meson of embodiment can, for the equipment of motor has reduced one process, has promoted assembly efficiency effectively.

In another embodiment of the present invention, the insulating member 20 is formed by injection molding a plastic material on the outer surface of the stop ring 12. Specifically, through making the better plastic material of insulating properties directly mould plastics at the surface that blocks the face, can make insulating part 20 can wrap up the surface at barrier ring 12 well, be difficult for droing in the vibrations service environment that lasts, have shockproof effect well to and also be difficult for droing under high low temperature's impact, excellent in use effect. The process is simple and the manufacturing cost is low.

In another embodiment of the present invention, the insulator 20 is formed by injecting Liquid Crystal Polymer (LCP, Liquid Crystal Polymer), Polyamide (PA, Polyamide), Polybutylene Terephthalate (PBT, Polybutylene Terephthalate), Polyethylene Terephthalate (PET, Polyethylene Terephthalate), Polyphthalamide (PPA, Polyphthalamide) or Polyphenylene Sulfide (PPS, Polyphenylene Sulfide) on the outer surface of the barrier ring 12. Specifically, by using a resistivity of 10¹³Omega m liquid crystal polymer injection molding insulator 20, so that the specific resistance of 10 is used under the condition that the thickness of the insulator 20 is not changed⁸The high-voltage resistance of the existing product of the omega-m phenolic resin on the insulating layer is improved by 150 percent, and better insulating and voltage-resisting capability is formed. Of course, the insulating member 20 can also be made of polyamide, polybutylene terephthalate, polyethylene terephthalate, polyterephthalamide or polyphenylene sulfide with better resistivity by injection molding, so as to form better insulation and voltage resistance.

In another embodiment of the present invention, as shown in fig. 5 to 8, the stop ring 12 has an end surface 121 located far away from the socket ring 11 and a side surface 122 located between the end surface 121 and the socket ring 11, and at least one notch 123 is provided on the end surface 121 and/or the side surface 122. Specifically, through setting up breach 123 on barrier ring 12, when moulding plastics the plastic material to on the terminal surface 121 and the side 122 of bell and spigot ring 11 like this, will have partial plastic material to fill in breach 123, like this when the plastic material solidification forms insulating part 20, just so make insulating part 20's partial structure can block and establish in breach 123 to make insulating part 20 can wrap up well on barrier ring 12, be difficult for droing, the shockproof effect is fabulous. The shape of the notch 123 may be a dovetail groove shape, a circular shape, a rectangular shape, an irregular polygon shape, or the like, and may be set as required. The number of the gaps 123 can be multiple according to the requirement, and the gaps 123 can be uniformly and regularly arranged or irregularly arranged.

In another embodiment of the present invention, as shown in fig. 8, the notch 123 extends from the end surface 121 toward the ferrule 11. Specifically, the notch 123 may be a cavity with a single-side opening at the end face 121, that is, the notch 123 is located between the two side faces 122, so that when plastic is injected, the plastic material is filled in the cavity, and after the plastic material is hardened to form the insulating member 20, a wedge inserted into the cavity is formed at the position of the insulating member 20 located in the cavity, which can effectively increase the adhesion between the insulating member 20 and the socket ring 11, so that the insulating member 20 is not easily separated from the socket ring 11.

In another embodiment of the present invention, as shown in fig. 5, the notch 123 penetrates the side surface 122 in the axial direction of the metal member 10. Specifically, a notch 123 which is communicated with the outside is formed on the edge cutting part structure of the barrier ring 12, so that the insulating piece 20 formed after plastic injection can enable part of the structure of the insulating piece 20 to be clamped in the notch 123 to form crossed connection with the barrier ring 12, and the insulating piece 20 can be favorably wrapped on the barrier ring 12. The distance between the openings of the gap 123 at the end surface 121 is set to be smaller than the maximum distance between the two side walls inside the gap 123, so that the cross portion between the formed insulating member 20 and the blocking ring 12 can be well clamped in the gap 123, and the insulating member 20 is prevented from falling off the blocking ring 12. Moreover, the notch 123 is easy to process and low in processing cost.

In another embodiment of the present invention, as shown in fig. 6 and 7, the notch 123 is located on at least one of the side surfaces 122 or penetrates between the side surfaces 122. Specifically, the notch 123 may be a groove disposed on the side surface 122, so that the insulating member 20 can be well clamped on the blocking ring 12; certainly, the gap 123 may also penetrate between the two side surfaces 122 of the blocking ring 12, so that the injection-molded insulating element 20 has a partial structure completely embedded in the blocking ring 12, and the insulating element 20 can be prevented from falling off in a complex vibration environment, and the using effect is good.

In another embodiment of the present invention, as shown in fig. 5 and 10, at least one end of the coupling ring 11 protrudes from the side 122 of the stop ring 12 along the central axis of the coupling ring 11. Specifically, by increasing the length of one end or both ends of the ferrule 11 in the axial direction of the ferrule 11, the matching surface between the ferrule 11 and the armature shaft 30 can be effectively increased, and the length of the matching surface is increased by 80%, so that the ferrule 11 is more stably sleeved on the armature shaft 30, the push-out force is increased by 20%, and the ferrule is more firm under the impact of vibration and high and low temperatures.

In another embodiment of the present invention, as shown in fig. 12, 14 and 16, the insulating member 20 includes two facing structures 21 and an outer ring structure 22 disposed at an interval, the peripheries of the two facing structures 21 are both connected to the outer ring structure 22, the two facing structures 21 and the outer ring structure 22 jointly enclose a mounting area for mounting the blocking ring 12, and the outer ring structure 22 is disposed to protrude toward the side of one of the facing structures 21. Specifically, the facing structure 21 of the insulator 20 is disposed against the side surface 122 of the blocker ring 12, and the outer ring structure 22 is disposed around the end surface 121 of the blocker ring 12, thus wrapping around the outer surface of the blocker ring 12. The oil penetration path on the armature shaft 30 is shown by the bold arrow in fig. 3, and then the outer ring structure 22 is protruded towards the side of one of the facing structures 21, that is, a step or bowl shape is formed between the outer ring structure 22 and the facing structure 21, so that the creepage distance between the copper bar 41 of the commutator 40 and the armature shaft 30 can be further increased, and the formed annular step or bowl-shaped cavity can be used for storing oil or carbon powder and other impurities, and the occurrence of short circuit of the armature shaft 30 can be greatly reduced. The outer ring structure 22 protrudes towards the direction departing from the copper bar 41 of the commutator 40, that is, the formed annular step-shaped or bowl-shaped concave cavity is arranged opposite to the copper bar 41 of the commutator 40, so that on the premise of ensuring the increase of the creepage distance, sundries such as oil stains or carbon powder can be blocked and stored on one side away from the copper bar 41 of the commutator 40, the short circuit of the armature shaft 30 is avoided, and the motor is ensured to run safely and stably.

In another embodiment of the present invention, as shown in fig. 3, 15 and 16, the outer surface of the insulating member 20 is provided with at least one annular groove 211 around the periphery of the coupling ring 11. Specifically, as shown by the bold arrows in fig. 3, the oil penetration path on the armature shaft 30 is provided with the annular groove 211 on the outer surface of the insulating member 20, so that the creepage distance between the copper bar 41 of the commutator 40 and the armature shaft 30 can be further increased, and the annular groove 211 can be used for storing oil or carbon powder and other impurities, so that the occurrence of short circuit of the armature shaft 30 can be greatly reduced. Wherein, through making annular groove 211 be located insulating part 20 towards the one side of keeping away from commutator 40 copper bar 41, can guarantee to increase under the prerequisite of creepage distance like this for debris such as greasy dirt or carbon dust can be blockked to be stored in the one side of keeping away from commutator 40 copper bar 41, avoid the condition of armature shaft 30 short circuit to appear, guarantee that the motor is safe, operate steadily.

As shown in fig. 1-3, the embodiment of the present invention further provides an armature structure, which includes an armature shaft 30, a commutator 40 and the above rubber-coated meson, wherein the commutator 40 is installed on the armature shaft 30, the sleeve ring 11 is sleeved on the armature shaft 30 and is in interference connection with the armature shaft 30, the sleeve ring 11 is located at the end of the commutator 40, and the copper bar 41 of the commutator 40 is abutted to the insulating member 20.

In the armature structure according to the embodiment of the present invention, since the above-mentioned rubber-coated meson is used, the penetration of the bearing oil toward the commutator 40 is blocked by the interference connection of the sleeve ring 11 and the armature shaft 30; then, because the copper bar 41 of the commutator 40 is positioned on one side of the insulating member 20, a creepage distance is formed from the position where the copper bar 41 of the commutator 40 is abutted against one side of the insulating member 20 to the position where the copper bar 41 is positioned on the other side of the insulating member 20, the creepage distance is a + b + c, the creepage distance is greatly increased (by 2.55 times), the problem of reduction of the insulation and voltage resistance caused by adhesion of a conductive substance is effectively solved, and the use effect is good.

As shown in fig. 1 to 3, an embodiment of the present invention further provides a motor, including the above-mentioned armature structure.

The utility model discloses motor owing to use and have foretell armature structure, at the in-process that uses, can prevent effectively that armature shaft 30 and copperbar 41 from forming the electrical contact to prevent the motor short circuit, it is safe in utilization.

The utility model discloses the motor still includes auxiliary metal meson 50, and auxiliary metal meson 50 cup joints on armature shaft 30 and is located the one end that the commutator 40 was kept away from to the cover ring 11, and auxiliary metal meson 50 and insulator 20 butt, at the in-process that uses, insulator 20 make and form electrical insulation between auxiliary metal meson 50 and commutator 40's the copper bar 41 to prevent the motor short circuit, it is safe in utilization.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. An encapsulated meson, which is characterized in that: the metal meson comprises a sleeving ring and a blocking ring arranged on the periphery of the sleeving ring in a surrounding mode, the sleeving ring is used for being sleeved on an armature shaft to prevent oil from permeating towards a commutator, and the insulating piece wraps the outer surface of the blocking ring and is used for preventing a copper bar of the commutator from being in electric contact with the metal meson.

2. The encapsulated meson of claim 1, wherein: the insulating part is formed by plastic material injection molding on the outer surface of the stop ring.

3. The encapsulated meson of claim 2, wherein: the insulating part is formed by injection molding of liquid crystal polymer, polyamide, polybutylene terephthalate, polyethylene terephthalate, poly-p-phenylene terephthalamide or polyphenylene sulfide on the outer surface of the barrier ring.

4. The encapsulated meson of claim 1, wherein: the stop ring is provided with an end face far away from the splicing ring and a side face between the end face and the splicing ring, and at least one notch is arranged on the end face and/or the side face.

5. The encapsulated meson of claim 4, wherein: the notch extends from the end face toward the socket ring.

6. The encapsulated meson of claim 5, wherein: the notch penetrates through the side face in the axial direction of the metal meson.

7. The encapsulated meson of claim 4, wherein: the notch is positioned on at least one of the side surfaces or penetrates between the two side surfaces.

8. The encapsulated meson according to any of claims 1 to 7, wherein: at least one end of the sleeving ring protrudes out of the side face of the blocking ring along the central axis direction of the sleeving ring.

9. The encapsulated meson according to any of claims 1 to 7, wherein: the insulating part includes wainscot structure and outer loop structure that two intervals set up, two the periphery of wainscot structure all with outer loop structure connects, two wainscot structure with outer loop structure encloses jointly to establish and forms and is used for the installation the installing zone of barrier ring, outer loop structure orientation one of them side protrusion setting of wainscot structure.

10. The encapsulated meson according to any of claims 1 to 7, wherein: at least one annular groove wound on the periphery of the sleeving ring is arranged on the outer surface of the insulating part.

11. An armature structure, characterized in that: the rubber-coated meson comprises an armature shaft, a commutator and the rubber-coated meson as claimed in any one of claims 1 to 10, wherein the commutator is installed on the armature shaft, the sleeve ring is sleeved on the armature shaft and is in interference connection with the armature shaft, the sleeve ring is located at the end part of the commutator, and the copper bar of the commutator is abutted to the insulating part.

12. An electric machine characterized by: comprising the armature structure of claim 11.