CN220510426U

CN220510426U - Firmly-connected commutator

Info

Publication number: CN220510426U
Application number: CN202322225482.8U
Authority: CN
Inventors: 王亚龙; 王董斌
Original assignee: Ningbo Qida Electrical Technology Co ltd
Current assignee: Ningbo Qida Electrical Technology Co ltd
Priority date: 2023-08-17
Filing date: 2023-08-17
Publication date: 2024-02-20
Anticipated expiration: 2033-08-17

Abstract

The application relates to the technical field of commutators, and more particularly relates to a firmly connected commutator, comprising: the utility model discloses a bakelite powder, which comprises a bakelite powder body, a plurality of reversing pieces and a plurality of insulating pieces, wherein the reversing pieces are annularly arranged and embedded on the bakelite powder body, two sides of each reversing piece are provided with a clamping groove, an insulating piece is arranged between two adjacent reversing pieces, two sides of each insulating piece are respectively abutted against the side surfaces of the corresponding reversing piece, two sides of each insulating piece are provided with a clamping part, the clamping parts are clamped with the corresponding clamping grooves, and each insulating piece is embedded on the bakelite powder body.

Description

Firmly-connected commutator

Technical Field

The application relates to the technical field of commutators, in particular to a firmly connected commutator.

Background

In order to realize the commutation of the motor shaft, commutators are often arranged in the motor.

The existing commutator, as shown in fig. 1, comprises a bakelite powder body 90 and a plurality of commutating segments 91, wherein the commutating segments 91 are annularly arranged and embedded in the bakelite powder body 90, each commutating segment 91 is embedded in a groove 911 which is symmetrically arranged on one side of the bakelite powder body 90, and when the bakelite powder body 90 and the commutating segments 91 are molded integrally, the bakelite powder fills a space formed by the groove 911. The bakelite powder body 90 is mounted on the rotor of the motor and rotates along with the rotor, and the grooves 911 are provided to reduce the risk of the commutator segments 91 flying out when the bakelite powder body 90 rotates. However: under the condition that the rotor rotates at a high speed, the commutator is embedded into the bakelite powder body 90 only by the groove 911 to realize anti-falling, and the commutator segments 91 still have the flying segment risk and are not suitable for a high-speed motor.

Therefore, the need exists to provide a commutator which is firmly connected, has no possibility of the commutator segment flying out, and is suitable for a high-speed motor.

Disclosure of Invention

The utility model provides a connect firm commutator, wherein, connect firm commutator includes a bakelite powder body, a plurality of commutator segments and a plurality of insulating part, the commutator segment be annular arrange and inlay in on the bakelite powder body, every the both sides of commutator segment all have a draw-in groove, adjacent two all be equipped with one between the commutator segment the insulating part, just the both sides of insulating part respectively with the side of corresponding commutator segment support and lean on, the both sides of insulating part all have a joint portion, joint portion with the draw-in groove joint that corresponds, every the insulating part all inlay in on the bakelite powder body, through making the insulating part respectively with the commutator segment joint of both sides, compare in prior art, have connect firm, the commutator segment is difficult for the departure, be applicable to high-speed motor's advantage.

Another object of the present application is to provide a firmly connected commutator, wherein, one side of the embedded portion deviating from the contact portion is further provided with two notches, two notches are respectively located at two end portions of the embedded portion, one side of each notch deviating from the contact portion is provided with an extension portion, the extension portion is connected with the embedded portion, the extension portion and one side wall of the notch, which is close to the contact portion, are separated by a predetermined distance, the firmly connected commutator further comprises two anti-slip rings, the two anti-slip rings are respectively located at two ends of the commutator bar, one anti-slip ring is arranged in each notch, the extension portion is penetrated by the anti-slip rings, the end portion of the extension portion is provided with a buckling portion, two end surfaces of the anti-slip ring are respectively abutted to the buckling portion and the wall surface of the notch, and the anti-slip rings are prevented from being separated from the extension portion by the buckling portion.

In order to achieve at least one of the above objects, the present application provides a firmly connected commutator, wherein the firmly connected commutator comprises:

a bakelite powder body; and

the reversing pieces are annularly arranged and embedded on the bakelite powder body, and two sides of each reversing piece are provided with a clamping groove; and

the insulating pieces are arranged between every two adjacent reversing pieces, two sides of each insulating piece are respectively abutted against the corresponding side faces of the reversing pieces, two sides of each insulating piece are respectively provided with a clamping part, each clamping part is clamped with the corresponding clamping groove, and each insulating piece is embedded in the bakelite powder body.

In one or more embodiments of the present application, one end of the clamping groove is through, and the other end is closed.

In one or more embodiments of the present application, the commutator segment includes a contact portion and an embedded portion, the contact portion is connected with the embedded portion, the clamping groove is located on a side surface of the contact portion, and two sides of the embedded portion are respectively provided with two through first hook grooves.

In one or more embodiments of the present application, a side of the embedded portion facing away from the contact portion has two through second hooking grooves.

In one or more embodiments of the present application, one side of the embedded portion facing away from the contact portion is further provided with two notches, two notches are respectively located at two end portions of the embedded portion, one side of each notch facing away from the contact portion is provided with an extending portion, the extending portion is connected with the embedded portion, the extending portion and one side wall of the notch, which is close to the contact portion, are separated by a predetermined distance, the firmly connected commutator further comprises two anti-slip rings, the two anti-slip rings are respectively located at two ends of the commutator segment, one anti-slip ring is arranged in each notch, and the extending portion penetrates through the anti-slip rings.

In one or more embodiments of the present application, the end portion of the extension portion has a buckling portion, and two end faces of the anti-slip ring respectively abut against the buckling portion and a wall face of the notch.

In one or more embodiments of the present application, the connection between the extension and the bend has a through bend hole.

In one or more embodiments of the present application, an end surface of the anti-slip ring near the bending part has a compensation groove.

In one or more embodiments of the present application, the inner wall of the anti-slip ring has a plurality of grooves, each of the extending portions has a positioning protrusion thereon, and when the anti-slip ring is placed in the notch, the positioning protrusion is clamped into the groove.

In one or more embodiments of the present application, a side of each insulating member facing away from the clamping portion is provided with a plurality of clamping hook portions, and the clamping hook portions are embedded into the bakelite powder body.

In this application embodiment, connect firm commutator includes a bakelite powder body, a plurality of commutator segments and a plurality of insulating part, the commutator segment is annular arrangement and inlays on bakelite powder body, the both sides of each commutator segment all have a draw-in groove, all be equipped with an insulating part between two adjacent commutator segments, and the both sides of insulating part support with the side of corresponding commutator segment respectively and lean on, the both sides of insulating part all have a joint portion, joint portion and the draw-in groove joint that corresponds, each insulating part all inlays on bakelite powder body, through making the insulating part respectively with the commutator segment joint of both sides, make the commutator segment spacing each other in the circumference direction, compared with prior art, it is firm to connect, the commutator segment is difficult for the departure, be applicable to high-speed motor's advantage.

Drawings

These and/or other aspects and advantages of the present application will become more apparent and more readily appreciated from the following detailed description of the embodiments of the present application, taken in conjunction with the accompanying drawings, wherein:

FIG. 1 illustrates a schematic structural view of a prior art commutator;

FIG. 2 is a schematic view of a firmly connected commutator according to an embodiment of the present application;

fig. 3 illustrates a schematic structural view of a commutator segment;

FIG. 4 illustrates a schematic view of a firmly connected commutator from another perspective;

FIG. 5 illustrates a schematic structural view of the commutator segments, insulator and anti-slip ring after being mounted to each other;

fig. 6 illustrates a schematic structural view of the drop-out prevention ring.

Detailed Description

The terms and words used in the following description and claims are not limited to literal meanings, but are used only by the inventors to enable a clear and consistent understanding of the application. It will be apparent to those skilled in the art, therefore, that the following description of the various embodiments of the present application is provided for the purpose of illustration only and not for the purpose of limiting the application as defined by the appended claims and their equivalents.

It will be understood that the terms "a" and "an" should be interpreted as referring to "at least one" or "one or more," i.e., in one embodiment, the number of elements may be one, while in another embodiment, the number of elements may be plural, and the term "a" should not be interpreted as limiting the number.

Although ordinal numbers such as "first," "second," etc., will be used to describe various components, those components are not limited herein. The term is used merely to distinguish one component from another. For example, a first component may be referred to as a second component, and likewise, a second component may be referred to as a first component, without departing from the teachings of the inventive concept. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

The terminology used herein is for the purpose of describing various embodiments only and is not intended to be limiting. As used herein, the singular is intended to include the plural as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, or groups thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, or groups thereof.

Summary of the application

The existing commutator comprises a bakelite powder body and a plurality of commutator segments, wherein the commutator segments are embedded into the bakelite powder body by virtue of grooves, under the condition that a rotor rotates at a high speed, the commutator is embedded into the bakelite powder body by virtue of the grooves to realize anti-falling, and the commutator segments still have the flyer risk and are not suitable for a high-speed motor.

Based on the technical problems, the application provides the firmly connected commutator, wherein the firmly connected commutator is simple in structure, does not relate to complex manufacturing process and expensive materials, has higher economical efficiency, and is easy to produce, low in cost, more beneficial to control the production cost and further beneficial to product popularization and use for manufacturers.

A reverser is schematically and firmly connected to the device,

referring to fig. 2 to 6, a firmly connected commutator according to a preferred embodiment of the present utility model includes a bakelite powder body 10 and a plurality of commutator segments 20.

Specifically, the bakelite powder body 10 is obtained by injection molding bakelite powder, and in this embodiment, the bakelite powder body 10 is cylindrical; in addition, as shown in fig. 2 and 4, the center of the bakelite powder body 10 has a through mounting hole 101, and the bakelite powder body 10 is mounted on the motor rotor through the mounting hole 101.

In addition, as shown in fig. 2, the commutator segments 20 are annularly arranged and embedded on the bakelite powder body 10, and it should be noted that when the motor rotor rotates, the commutator segments 20 contact with the brushes; in addition, the reversing pieces 20 and the bakelite powder are integrally molded by injection molding, so that the reversing pieces 20 are embedded into the bakelite powder body 10; in addition, to avoid short circuits, two adjacent segments 20 are spaced apart by a predetermined distance.

In the prior art, the commutating segments 20 are independent of each other and only are engaged with the bakelite powder body 10, so that the commutating segments 20 fly when the motor rotor rotates at high speed. In this embodiment, in order to realize insulation and isolation between two adjacent segments 20, as shown in fig. 2, the firmly connected commutator further includes a plurality of insulation members 30, one insulation member 30 is disposed between two adjacent segments 20, when the insulation member 30 is disposed between two segments 20, two sides of the insulation member 30 respectively abut against corresponding sides of the segments 20, and each insulation member 30 is embedded on the bakelite powder body 10 in an injection molding manner, the material of the insulation member 30 is further implemented as mica, and the insulation member 30 is disposed to isolate the two segments 20.

In addition, in the embodiment of the present application, as shown in fig. 2 and 3, each of the two sides of the commutator segments 20 has a clamping groove 201, each of the two sides of the insulating member 30 has a clamping portion 301, and the clamping portion 301 is clamped with the corresponding clamping groove 201. It should be noted that, by utilizing the positional relationship that the insulating member 30 is located between the two commutating segments 20, the clamping groove 201 is provided on the commutating segments 20, the clamping portion 301 is provided on the insulating member 30, and each of the commutating segments 20 that are originally independent of each other is connected together in an insulating manner by clamping the clamping portion 301 into the corresponding clamping groove 201, each of the commutating segments 20 is limited in the circumferential direction, and compared with the prior art, the commutating segments 20 are not easy to fly out when the motor rotor rotates, and have the advantages of firm connection, difficult fly-out of the commutating segments 20, and suitability for the commutating device of the high-speed motor.

Further, since the commutator segments 20, the insulating member 30 and the bakelite powder body 10 are injection-molded integrally, the commutator segments 20 and the insulating member 30 should be coupled in place in advance of the injection molding. In this embodiment, each of the segments 20 is inserted into the corresponding slot for the mold, and then each of the insulating members 30 is inserted between two adjacent segments 20, so as to ensure that the engaging portion 301 of each of the insulating members 30 extends into the corresponding slot 201 by the same distance, as shown in fig. 3, one end of the slot 201 is through, and the other end is closed. It should be noted that, the processing personnel makes the clamping portion 301 of each insulating member 30 align with the notch of the clamping groove 201, then inserts the insulating member 30 from the notch of the clamping groove 201, that is, one end of the clamping groove 201 is penetrated, after each insulating member 30 is inserted into the corresponding clamping groove 201, only one pressing sheet is needed to press down each insulating member 30, and because the other end of the clamping groove 201 is closed, one end of each insulating member 30 pressed down by the pressing sheet abuts against the wall surface of the closed end of the clamping groove 201, so as to realize that each insulating member 30 is installed in place.

Further, in order to strengthen the connection between the commutator segment 20 and the bakelite powder body 10, as shown in fig. 2 and 3, the commutator segment 20 includes a contact portion 202 and an embedded portion 203, the contact portion 202 is connected with the embedded portion 203, the clamping groove 201 is located on the side surface of the contact portion 202, two through first hooking grooves 2031 are formed on two sides of the embedded portion 203, after injection molding, the bakelite powder fills the first hooking grooves 2031, and when centrifugal force during rotation of the motor rotor acts on the commutator segment 20, the bakelite powder filled in the first hooking grooves 2031 effectively limits the commutator segment 20 from flying out.

In addition, as shown in fig. 3 and 4, the side of the embedded portion 203 facing away from the contact portion 202 further has two through second hooking grooves 2032, the extending direction of the second hooking grooves 2032 is perpendicular to the extending direction of the first hooking grooves 2031, and the second hooking grooves 2032 are provided to further embed the commutator segment 20 in the bakelite powder body 10.

Further, to further prevent the commutator segment 20 from falling out, as shown in fig. 3 and fig. 4, a side of the embedded portion 203 facing away from the contact portion 202 is further provided with two notches 2033, the two notches 2033 are respectively located at two end portions of the embedded portion 203, a side of each notch 2033 facing away from the contact portion 202 is provided with an extending portion 2034, the extending portion 2034 is connected with the embedded portion 203, the extending portion 2034 and a side wall of the notch 2033, which is close to the contact portion 202, are spaced by a predetermined distance, as shown in fig. 4 and fig. 5, the firmly connected commutator further comprises two anti-falling rings 40, the two anti-falling rings 40 are respectively located at two ends of the commutator segment 20, each anti-falling ring 40 is disposed in each notch 2033, and the extending portion 2034 is penetrated by the anti-falling ring 40, so that the circumferential movement of each commutator segment 20 is limited by the anti-falling rings 40.

In this case, the drop-preventing ring 40 is easily pulled out from the extending portion 2034, and in order to prevent the drop-preventing ring 40 from being pulled out, as shown in fig. 3 and 4, the end portion of the extending portion 2034 has a bent portion 2035, and both end surfaces of the drop-preventing ring 40 abut against the bent portion 2035 and the wall surface of the notch 2033, respectively. It should be noted that, when the initial state of the bending portion 2035 is horizontally arranged and is not bent, after the bending portion 2035 passes through the anti-falling ring 40, a processing personnel bends each bending portion 2035, each bending portion 2035 abuts against the end face of the anti-falling ring 40 after bending by 90 degrees, and then the anti-falling ring 40 is blocked by the bending portion 2035 and is difficult to fall out from the extending portion 2034.

Further, to facilitate the bending portion 2035 being bent, as shown in fig. 3, a through bending hole 2036 is formed at the connection between the extending portion 2034 and the bending portion 2035.

In addition, before injection molding, in order to facilitate the processing personnel to break off the bending portion 2035 and simply bend back the bending portion 2035, as shown in fig. 4, 5 and 6, the end surface of the anti-drop ring 40, which is close to one end of the bending portion 2035, is provided with a compensation groove 401, the compensation groove 401 is an annular groove, the bending portion 2035 is approximately attached to the wall surface of the anti-drop ring 40, and when the bending portion 2035 is required to bend back, the processing personnel can make one forceps leg of the forceps extend into the compensation groove 401, and the other forceps leg is located on one side of the bending portion 2035, which is away from the compensation groove 401, and then clamp the bending portion 2035 to recalibrate the position.

Further, to avoid the circumferential rotation of the anti-slip ring 40 during buckling, as shown in fig. 6, the inner wall of the anti-slip ring 40 has a plurality of grooves 402, as shown in fig. 3 and 4, each of the extending portions 2034 has a positioning protrusion 2037 thereon, when the anti-slip ring 40 is placed in the notch 2033, the positioning protrusions 2037 are locked into the grooves 402 and limit the circumferential rotation of the anti-slip ring 40, and in addition, before injection, the positioning protrusions 2037 are locked into the grooves 402 to facilitate positioning and mounting of the anti-slip ring 40.

Further, in order to prevent the insulating members 30 from separating from the bakelite powder body 10 under the action of centrifugal force, as shown in fig. 2, a side of each insulating member 30 facing away from the clamping portion 301 is provided with a plurality of clamping hook portions 302, and the clamping hook portions 302 are embedded into the bakelite powder body 10.

In summary, the firmly connected commutator according to the embodiments of the present application is illustrated, which provides the firmly connected commutator with advantages of firm connection, difficult flyout of the commutator segments, and suitability for high-speed motors.

It should be noted that in the embodiment of the present application, the firmly connected commutator has a simple structure, does not involve complicated manufacturing process and expensive materials, and has high economical efficiency. Meanwhile, for manufacturers, the firmly connected commutator is easy to produce, low in cost, beneficial to control of production cost and beneficial to product popularization and use.

It will be appreciated by persons skilled in the art that the embodiments of the utility model described above and shown in the drawings are by way of example only and are not limiting. The objects of the present utility model have been fully and effectively achieved. The functional and structural principles of the present utility model have been shown and described in the examples and embodiments of the utility model may be modified or practiced without departing from such principles.

Claims

1. The utility model provides a connect firm commutator which characterized in that: the firmly connected commutator comprises

A bakelite powder body; and

2. The securely connected commutator of claim 1, wherein: one end of the clamping groove is communicated, and the other end of the clamping groove is closed.

3. The securely connected commutator of claim 2, wherein: the reversing sheet comprises a contact part and an embedded part, wherein the contact part is connected with the embedded part, the clamping groove is positioned on the side face of the contact part, and two through first hooking grooves are formed in two sides of the embedded part.

4. A firmly connected commutator as defined in claim 3, wherein: the embedded part is provided with two through second hooking grooves at one side facing away from the contact part.

5. The securely connected commutator of claim 3 or 4, wherein: the embedded part is provided with two notches at one side deviating from the contact part, the two notches are respectively positioned at the end parts of the two ends of the embedded part, one side of each notch deviating from the contact part is provided with an extension part, the extension part is connected with the embedded part, the extension part and the notch are close to one side wall of the contact part, which is separated by a preset distance, the firmly connected commutator further comprises two anti-slip rings, the two anti-slip rings are respectively positioned at the two ends of the commutator segment, and each notch is internally provided with one anti-slip ring, and the extension part penetrates through the anti-slip rings.

6. The securely connected commutator of claim 5, wherein: the end part of the extension part is provided with a bending part, and two end surfaces of the anti-drop ring are respectively abutted against the bending part and the wall surface of the notch.

7. The securely connected commutator of claim 6, wherein: the connecting part of the extension part and the bending part is provided with a through bending hole.

8. The securely connected commutator of claim 6, wherein: the end face of the anti-drop ring, which is close to one end face of the bending part, is provided with a compensation groove.

9. The securely connected commutator of claim 5, wherein: the inner wall of the anti-drop ring is provided with a plurality of grooves, each extension part is provided with a positioning protrusion, and when the anti-drop ring is arranged in the notch, the positioning protrusions are clamped into the grooves.

10. The securely connected commutator of claim 5, wherein: each insulating piece is provided with a plurality of clamping hook parts on one side which is away from the clamping part, and the clamping hook parts are embedded into the bakelite powder body.