CN209766809U - Sawtooth type commutator segment and commutator - Google Patents
Sawtooth type commutator segment and commutator Download PDFInfo
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- CN209766809U CN209766809U CN201920472959.3U CN201920472959U CN209766809U CN 209766809 U CN209766809 U CN 209766809U CN 201920472959 U CN201920472959 U CN 201920472959U CN 209766809 U CN209766809 U CN 209766809U
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Abstract
The utility model provides a sawtooth pattern commutator segment, it is rectangular form copper bar, its including be used for with the sliding part of carbon brush contact and with the gomphosis portion of commutator bakelite main part looks gomphosis, gomphosis portion both sides are equipped with the multislot body combination that the cross-section becomes sawtooth pattern respectively, the length direction of the single cell body is parallel with commutator segment length direction in the multislot body combination, the groove maximum depth degree of depth of multislot body combination is 1/8-1/5 of the outer arc length of commutator segment. The combination of multislot body sets up in commutator segment gomphosis portion both sides uniformly, has improved the cohesion of commutator segment with the bakelite main part greatly, and the commutator segment position is more firm, and when the motor is high-speed rotatory, the shearing force that the commutator segment received is by homodisperse, prevents that local atress is too big, and the segment interval of commutator segment is poor when reducing the operation, has promoted the whole mechanical properties of commutator.
Description
Technical Field
The utility model relates to a sawtooth pattern commutator segment and commutator.
Background
The commutator is the main part of the motor and mainly comprises a commutator segment and a bakelite main body. The commutator segment is fixed in the bakelite main body, and the tension of the bakelite main body on the commutator segment counteracts the centrifugal force of the commutator segment when the bakelite main body rotates at a high speed.
at present, a commutator of a high-efficiency motor is required to be capable of withstanding higher rotating speed, so that higher requirements are required for a destructive rotation test of the commutator, and the strength of the commutator of the existing structure cannot meet the high rotating speed performance of the high-efficiency motor, so that a firmer commutator needs to be designed to meet the increasingly improved use requirements of customers.
SUMMERY OF THE UTILITY MODEL
in order to overcome the defects of the prior art, the utility model aims to provide a sawtooth type commutator segment and a commutator.
In order to achieve the above object, the technical solution of the present invention is: a sawtooth type commutator segment is a strip-shaped copper bar and comprises a sliding portion used for being in contact with a carbon brush and an embedding portion embedded with a commutator bakelite main body, wherein the two sides of the embedding portion are respectively provided with a multi-groove body combination with sawtooth-shaped sections, the length direction of a single groove body in the multi-groove body combination is parallel to the length direction of the commutator segment, and the maximum groove depth of the multi-groove body combination is 1/8-1/5 of the outer arc length of the commutator segment.
The utility model discloses compare in prior art, the combination of multislot body sets up in commutator segment gomphosis portion both sides uniformly, has improved the cohesion of commutator segment with the bakelite main part greatly, and the commutator segment position is more firm, and when the motor is high-speed rotatory, the shearing force that the commutator segment received is by homodisperse, prevents that local atress is too big, and it is poor to reduce the section of operation commutator segment, has promoted the whole mechanical properties of commutator. The groove body direction is arranged along the length direction of the commutator segment, the groove body structure is directly generated during extrusion forming, the subsequent independent stamping procedure is omitted, the manufacturing and production process of the commutator segment is simpler, and the cost is saved.
Further, the section of a single groove body formed by combining the multiple groove bodies is triangular.
Furthermore, the multi-groove body combination is formed by combining a plurality of deep grooves and a plurality of shallow grooves at intervals, and the depth of the shallow grooves is 1/3-1/2 of the depth of the deep grooves.
By adopting the preferable scheme, the flowability of the bakelite powder among a plurality of groove bodies during filling can be improved, and the fullness of the bakelite powder filling is improved.
Furthermore, the multi-groove body combination is formed by combining a plurality of isosceles trapezoid grooves.
By adopting the preferable scheme, the filling amount of the bakelite powder in the commutator segment groove body is increased, and the binding force of the commutator segment and the bakelite powder is improved.
Furthermore, at least one side surface of the sliding part is provided with an inwards concave groove body, the position of the groove body corresponds to the maximum abrasion part allowed by the commutator segment, and a rubber sounding body which can generate abnormal sound by friction with the carbon brush is filled in the groove body.
By adopting the preferable scheme, when the commutator is used to a certain life, the commutator segment is worn to the sounding body, and the carbon brush and the rubber sounding body generate a prompt sound to prompt the motor to be repaired and replaced in time.
A commutator comprises a plurality of sawtooth-shaped commutator segments, wherein the sawtooth-shaped commutator segments are uniformly embedded in a bakelite main body.
adopt above-mentioned preferred scheme, when the motor is rotatory at a high speed, the shearing force that the commutator segment received is by homodisperse, prevents that local atress is too big, reduces the difference between the section of the commutator segment during operation, has promoted the whole mechanical properties of commutator.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an embodiment of the commutator segment of the present invention;
FIG. 2 is a schematic cross-sectional view of one embodiment of the commutator segment of the present invention;
Fig. 3 is a schematic cross-sectional view of another embodiment of the commutator segment of the present invention;
Fig. 4 is a schematic structural diagram of the commutator of the present invention.
Names of corresponding parts represented by numerals and letters in the drawings:
1-a commutator segment; 11-a sliding part; 12-a chimeric portion; 121-multiple groove body combination; 1211-deep groove; 1212-shallow grooves; 13-rubber sounding body; 2-bakelite body.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
As shown in fig. 1 and 2, a zigzag type commutator segment 1 is a strip-shaped copper bar, and includes a sliding portion 11 for contacting a carbon brush and an embedding portion 12 embedded with a commutator bakelite main body, wherein a multi-slot combination 121 with a zigzag cross section is respectively disposed on two sides of the embedding portion 12, a length direction of a single slot in the multi-slot combination 121 is parallel to a length direction of the commutator segment, and a maximum slot depth d of the multi-slot combination 121 is 1/8-1/5 of an outer arc length l of the commutator segment.
The beneficial effect of adopting above-mentioned technical scheme is: the combination of multislot body sets up in commutator segment gomphosis portion both sides uniformly, has improved the cohesion of commutator segment with the bakelite main part greatly, and the commutator segment position is more firm, and when the motor is high-speed rotatory, the shearing force that the commutator segment received is by homodisperse, prevents that local atress is too big, and the segment interval of commutator segment is poor when reducing the operation, has promoted the whole mechanical properties of commutator.
In other embodiments of the present invention, as shown in fig. 3, the cross-section of the single trough body of the multi-trough body combination 121 is triangular; the multi-groove body combination 121 is formed by alternately combining a plurality of deep grooves 1211 and a plurality of shallow grooves 1212, and the depth of the shallow grooves 1212 is 1/3-1/2 of the depth of the deep grooves 1211. The beneficial effect of adopting above-mentioned technical scheme is: the flowability of the bakelite powder among a plurality of tanks during filling can be improved, and the fullness of the bakelite powder filling is improved.
In other embodiments of the present invention, the multi-groove assembly is formed by combining a plurality of isosceles trapezoid-shaped grooves. The beneficial effect of adopting above-mentioned technical scheme is: the filling amount of bakelite powder in the commutator bar groove body is increased, and the binding force of the commutator bar and the bakelite powder is improved.
As shown in fig. 3, in another embodiment of the present invention, at least one side of the sliding part 12 is provided with a recessed groove, the groove is located at the maximum wear position allowed by the commutator segment, and the groove is filled with a rubber sounding body 13 which generates abnormal sound by friction with the carbon brush. The beneficial effect of adopting above-mentioned technical scheme is: when the commutator is used for a certain service life, the commutator segment is worn to the sounding body, and the carbon brush and the rubber sounding body 13 rub to generate prompt sound to prompt the maintenance and replacement of the motor in time.
As shown in fig. 4, the commutator comprises a plurality of zigzag segments 1, and the zigzag segments 1 are uniformly embedded in a bakelite body 2. The beneficial effect of adopting above-mentioned technical scheme is: when the motor rotates at a high speed, the shearing force applied to the commutator segment is uniformly dispersed, the local stress is prevented from being overlarge, the segment interval difference of the commutator segment during the operation is reduced, and the integral mechanical performance of the commutator is improved.
The above embodiments are only for illustrating the technical conception and the features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and the protection scope of the present invention can not be limited thereby, and all equivalent changes or modifications made according to the spirit of the present invention should be covered in the protection scope of the present invention.
Claims (6)
1. A sawtooth type commutator segment is characterized by being a strip-shaped copper bar and comprising a sliding portion and an embedding portion, wherein the sliding portion is used for being in contact with a carbon brush, the embedding portion is embedded with a commutator bakelite main body, a multi-groove body combination with a sawtooth-shaped cross section is arranged on each of two sides of the embedding portion, the length direction of a single groove body in the multi-groove body combination is parallel to the length direction of the commutator segment, and the maximum depth of a groove of the multi-groove body combination is 1/8-1/5 of the length of an outer circular arc of the commutator segment.
2. The sawtooth type commutator segment as claimed in claim 1, wherein the cross section of the single slot body of the multi-slot body combination is triangular.
3. The zigzag commutator segment as claimed in claim 2, wherein the multi-groove combination is formed by combining a plurality of deep grooves and a plurality of shallow grooves at intervals, and the depth of the shallow grooves is 1/3-1/2 of the depth of the deep grooves.
4. The sawtooth type commutator segment as claimed in claim 1, wherein the multi-groove body combination is formed by combining a plurality of isosceles trapezoid grooves.
5. The sawtooth type commutator segment as claimed in claim 1, wherein at least one side surface of the sliding part is provided with an inward-concave groove body, the position of the groove body corresponds to the maximum wear position allowed by the commutator segment, and a rubber sounding body which can generate abnormal sound by friction with the carbon brush is filled in the groove body.
6. A commutator, characterized in that the commutator comprises a plurality of sawtooth-shaped commutator segments as claimed in any one of claims 1 to 5, and the sawtooth-shaped commutator segments are uniformly embedded in a bakelite body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920472959.3U CN209766809U (en) | 2019-04-09 | 2019-04-09 | Sawtooth type commutator segment and commutator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920472959.3U CN209766809U (en) | 2019-04-09 | 2019-04-09 | Sawtooth type commutator segment and commutator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209766809U true CN209766809U (en) | 2019-12-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920472959.3U Active CN209766809U (en) | 2019-04-09 | 2019-04-09 | Sawtooth type commutator segment and commutator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209766809U (en) |
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2019
- 2019-04-09 CN CN201920472959.3U patent/CN209766809U/en active Active
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