CN113328311A - High-strength groove-shaped commutator - Google Patents
High-strength groove-shaped commutator Download PDFInfo
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- CN113328311A CN113328311A CN202110374997.7A CN202110374997A CN113328311A CN 113328311 A CN113328311 A CN 113328311A CN 202110374997 A CN202110374997 A CN 202110374997A CN 113328311 A CN113328311 A CN 113328311A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R39/00—Rotary current collectors, distributors or interrupters
- H01R39/02—Details for dynamo electric machines
- H01R39/04—Commutators
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Abstract
The invention belongs to the technical field of commutators, in particular to a high-strength groove-shaped commutator, which comprises commutating copper sheets, a plastic mold core and mica sheets, wherein the commutating copper sheets are uniformly distributed around the periphery of the plastic mold core, a gap is formed between every two adjacent commutating copper sheets to form an insulation gap, the mica sheets for separating the adjacent commutating copper sheets are arranged in the insulation gap, the upper end surfaces of the mica sheets are higher than the upper end surfaces of the commutating copper sheets and lower than the upper end surfaces of the plastic mold core, and a semi-surrounding space higher than the commutating copper sheets is formed between the upper ends of the mica sheets and the upper ends of the plastic mold core; through the arrangement of the mica sheets, a semi-surrounding space higher than the reversing copper sheets can be formed together with the plastic mold core, so that the contact between the adjacent side surfaces of the adjacent reversing copper sheets can be prevented, and the condition that welding slag generated by the welding wire grooves after welding wires enters the upper ends of the reversing copper sheets to cause the contact between the adjacent reversing copper sheets due to the existence of the welding slag can be reduced, thereby ensuring the safety performance.
Description
Technical Field
The invention belongs to the technical field of commutators, and particularly relates to a high-strength groove-shaped commutator.
Background
The commutator is widely applied to electric tools, the commutator provided with the welding wire step is generally a groove-shaped commutator, the welding wire groove is formed in the welding wire step, and the welding wire step of the groove-shaped commutator is formed on the top excircle of the sheet body.
When the existing commutator welding wire groove is used for welding wires of metal wires, welding slag possibly falls on the top end surface of the commutator copper sheets to cause welding slag contact between adjacent commutator copper sheets, and the foreign matter contact can cause extremely adverse effect on the work of a commutator. In addition, the existing groove-type commutator has fewer binding points between the commutating copper sheets and the plastic substrate of the commutator, and the binding force is not ideal, so that the mechanical strength is difficult to better ensure to improve the overspeed performance of the commutator.
Disclosure of Invention
In order to make up for the defects of the prior art, the invention provides a high-strength groove-type commutator which is mainly used for solving the problems that welding slag is likely to fall on the top end surface of a commutation copper sheet to cause welding slag contact between adjacent commutation copper sheets when the welding wire of a metal wire is welded in the welding wire groove of the conventional commutator, and the welding slag contact can cause extremely adverse influence on the work of the commutator.
The technical scheme adopted by the invention for solving the technical problems is as follows: the invention relates to a high-strength groove-shaped commutator which comprises reversing copper sheets, plastic mold cores and mica sheets, wherein the reversing copper sheets are uniformly distributed around the periphery of the plastic mold cores, gaps exist between the adjacent reversing copper sheets to form insulating gaps, the mica sheets for separating the adjacent reversing copper sheets are arranged in the insulating gaps, the upper end surfaces of the mica sheets are higher than the upper end surfaces of the reversing copper sheets and lower than the upper end surfaces of the plastic mold cores, and a semi-surrounding space higher than the reversing copper sheets is formed between the upper ends of the mica sheets and the upper ends of the plastic mold cores; the reversing copper sheet comprises an integrally formed copper sheet main body and a welding end at the upper end of the copper sheet main body, the inner side surface of the welding end is flush with the copper sheet main body, the outer side surface of the welding end extends outwards, and a welding wire groove is formed in the outer side of the welding end; the copper sheet of switching-over medial surface upper end is fixed and is provided with fixed foot, switching-over copper sheet medial surface lower extreme is fixed and is provided with down fixed foot, go up the clearance between fixed foot and the lower fixed foot and constitute the dovetail.
When the mica sheet is used, a semi-enclosed space higher than the reversing copper sheets can be formed together with the plastic mold core through the arrangement of the mica sheet, so that the contact between the adjacent side surfaces of the adjacent reversing copper sheets can be prevented, and the condition that welding slag generated by a welding wire groove after welding wires enters the upper ends of the reversing copper sheets to cause the adjacent reversing copper sheets to contact due to the existence of the welding slag can be reduced, thereby ensuring the safety performance; through the arrangement of the upper fixing foot, the lower fixing foot and the dovetail groove, when the commutator is subjected to injection molding, the material of the plastic mold core can be filled into the dovetail groove, so that the binding points between the commutator copper sheet and the plastic mold core are increased, the binding force is increased, the centrifugal force of the commutator copper sheet is offset, and the mechanical strength and the overspeed performance of a commutator product are improved.
Preferably, an upper reinforcing groove is formed in one side, facing the inner side face of the reversing copper sheet, of the upper end of the upper fixing foot; and one side of the lower end of the lower fixing pin, which faces the inner side surface of the reversing copper sheet, is provided with a lower reinforcing groove. Through the setting of last strengthening groove and strengthening groove down, can make switching-over copper sheet and plastics mold core firmly combine through last mode of placing the anchor ring in strengthening groove and the strengthening groove down, simultaneously, the switching-over copper sheet when the material pressure injection molding with plastics mold core, under the last top effect of pressure injection mould top to the anchor ring, the hole of anchor ring can paste the tight contact each other with the inboard trough rim of anchor ring groove, and then realize that the anchor ring cramps to the center of switching-over copper sheet, further improve the mechanical strength and the hypervelocity performance of cell type commutator.
Preferably, the upper fixing leg and the lower fixing leg are both internally provided with first through holes which are vertically communicated, and the first through holes in the upper fixing leg and the lower fixing leg are in the same vertical plane. Through the arrangement of the first through hole, on one hand, the materials of the upper fixing leg and the lower fixing leg can be reduced, the cost is reduced, on the other hand, the materials can be filled in the first through hole by pressing the materials into the first through hole during pressure injection, the materials at the upper end of the upper fixing leg and the lower end of the lower fixing leg can be connected with the materials in the dovetail groove from the inner parts of the upper fixing leg and the lower fixing leg after molding, meanwhile, the copper sheet for commutation can be limited to move along the radial direction, and further the mechanical strength and the overspeed performance of the slot type commutator are improved.
Preferably, a plurality of second through holes which penetrate along the circumferential direction of the plastic mold core are formed in the upper fixing leg and the lower fixing leg. Through the setting of second perforating hole, can restrict the removal of switching-over copper sheet along circumference, with the cooperation of first perforating hole, can improve the cohesion between switching-over copper sheet and the plastics mold core from a plurality of directions, and then improve the mechanical strength and the hypervelocity performance of cell type commutator.
Preferably, the side in the upper fixing foot and the lower fixing foot is symmetrically provided with two groups of V-shaped grooves extending vertically. Through the setting of V type groove, further increase the binding point between switching-over copper sheet and the plastics mold core, increase the cohesion.
Preferably, the outer sides of the welding ends on the two sides of the welding line groove are provided with spiral grooves, one end of each spiral groove is communicated with the welding line groove, and the other end of each welding line groove extends to the two sides of the welding end. Through the setting of helicla flute, can make when the switching-over copper sheet is rotatory, produce high-speed air current on switching-over copper sheet surface through the helicla flute, can enough blow off the welding slag that probably exists between the adjacent switching-over copper sheet, avoid the welding slag to get into the switching-over copper sheet upper end and lead to the condition of adjacent switching-over copper sheet because of the existence of welding slag and contact, can carry out the forced air cooling to switching-over copper sheet surface again simultaneously, avoid the condition that the heat that commutator and brush friction process each other in-process produced can not in time effluvium, and then avoid the condition that the high temperature of switching-over copper sheet produced deformation, consequently, the life of switching-over copper sheet has been prolonged.
Preferably, one side of the reversing copper sheet facing the mica sheet is provided with an elastic clamp for clamping the mica sheet, and two pins of the elastic clamp are respectively inserted into the corresponding second through hole and the corresponding spiral groove. Through the arrangement of the elastic clamp, the mica sheet can be clamped on one side of the corresponding reversing copper sheet before injection, so that the relative position accuracy of the reversing copper sheet and the mica sheet can be ensured, the risk of contact between adjacent reversing copper sheets caused by the position deviation of the reversing copper sheet and the mica sheet is avoided, the safety performance is further improved, the reversing copper sheet and the mica sheet can be integrated, the mechanical strength and the overspeed performance of the reversing copper sheet are improved by utilizing the binding force between the mica sheet and the plastic mold core, meanwhile, two pins of the elastic clamp only need to be inserted into the corresponding second through holes and the corresponding spiral grooves, the operation is convenient, and the workload before injection is not increased; in addition, the pin of the elastic clamp inserted into the second through hole can also improve the overall structural strength of the injection material in the second through hole, and further improve the mechanical strength and overspeed performance of the reversing copper sheet.
The invention has the following beneficial effects:
1. according to the high-strength groove-shaped commutator, the mica sheets are arranged, and the mica sheets and the plastic mold cores can form a semi-enclosed space higher than the commutating copper sheets, so that the contact between the adjacent side surfaces of the adjacent commutating copper sheets can be prevented, the condition that welding slag generated by a welding wire groove after welding wires enters the upper ends of the commutating copper sheets to cause the adjacent commutating copper sheets to contact due to the existence of the welding slag can be reduced, and the safety performance is ensured.
2. According to the high-strength groove-shaped commutator, due to the arrangement of the upper fixing foot, the lower fixing foot and the dovetail groove, when the commutator is subjected to injection molding, materials of the plastic mold core can be filled into the dovetail groove, so that the bonding points between the reversing copper sheet and the plastic mold core are increased, the bonding force is increased, the centrifugal force of the reversing copper sheet is offset, and the mechanical strength and the overspeed performance of a commutator product are improved.
Drawings
The invention will be further explained with reference to the drawings.
FIG. 1 is a perspective view of the present invention;
FIG. 2 is a top view of the present invention;
FIG. 3 is a perspective view of the present invention with the plastic core removed;
FIG. 4 is a front view of a copper segment for commutation according to the present invention;
FIG. 5 is a cross-sectional view taken along line A-A of FIG. 4 in accordance with the present invention;
FIG. 6 is a bottom cross-sectional view of a second through hole in a copper segment of the present invention;
FIG. 7 is a perspective view of the spring band of the present invention;
FIG. 8 is an assembly diagram of the commutation copper sheet and the mica sheet in the invention.
In the figure:
1. a commutation copper sheet; 11. a copper sheet main body; 12. welding the end; 13. a wire bonding groove; 14. a helical groove; 15. an elastic clamp; 16. an upper fixing leg; 161. a first through hole; 162. a V-shaped groove; 163. an upper reinforcement groove; 164. a second through hole; 17. a lower fixing leg; 171. a lower reinforcement groove; 18. a dovetail groove; 2. a plastic mold core; 3. mica sheet.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
As shown in fig. 1-8, a high-strength groove-shaped commutator comprises commutator copper sheets 1, plastic mold cores 2 and mica sheets, wherein the commutator copper sheets 1 are uniformly distributed around the periphery of the plastic mold cores 2, gaps exist between adjacent commutator copper sheets 1 to form insulating gaps, the mica sheets for separating the adjacent commutator copper sheets 1 are arranged in the insulating gaps, the upper end surfaces of the mica sheets are higher than the upper end surfaces of the commutator copper sheets 1 and lower than the upper end surfaces of the plastic mold cores 2, and a semi-enclosed space higher than the commutator copper sheets 1 is formed between the upper ends of the mica sheets and the upper ends of the plastic mold cores 2; the reversing copper sheet 1 comprises an integrally formed copper sheet main body 11 and a welding end 12 at the upper end of the copper sheet main body, the inner side surface of the welding end 12 is flush with the copper sheet main body 11, the outer side surface of the welding end extends outwards, and a welding line groove 13 is formed in the outer side of the welding end 12; an upper fixing pin 16 is fixedly arranged at the upper end of the inner side surface of the reversing copper sheet 1, a lower fixing pin 17 is fixedly arranged at the lower end of the inner side surface of the reversing copper sheet 1, and a dovetail groove 18 is formed in a gap between the upper fixing pin 16 and the lower fixing pin 17.
When the mica sheet is used, a semi-enclosed space higher than the reversing copper sheets 1 can be formed together with the plastic mold core 2 through the arrangement of the mica sheet, so that the contact between the adjacent side surfaces of the adjacent reversing copper sheets 1 can be prevented, and the condition that welding slag generated by the welding wire grooves 13 after welding wires enters the upper ends of the reversing copper sheets 1 to cause the contact of the adjacent reversing copper sheets 1 due to the existence of the welding slag can be reduced, thereby ensuring the safety performance; through the arrangement of the upper fixing foot 16, the lower fixing foot 17 and the dovetail groove 18, when the commutator is molded by injection, the material of the plastic mold core 2 can be filled in the dovetail groove 18, so that the binding points between the commutator copper sheet 1 and the plastic mold core 2 are increased, the binding force is increased, the centrifugal force of the commutator copper sheet 1 is offset, and the mechanical strength and the overspeed performance of a commutator product are improved.
As an embodiment of the present invention, an upper reinforcing groove 163 is provided on the upper end of the upper fixing leg 16 facing the inner side surface of the commutation copper sheet 1, and the upper reinforcing groove 163 is; the lower end of the lower fixing leg 17 is provided with a lower reinforcing groove 171 on one side facing the inner side surface of the commutation copper sheet 1. Through the setting of last strengthening groove 163 and strengthening groove 171 down, can make switching-over copper sheet 1 and plastics mold core 2 firmly combine through last mode of placing the reinforcement ring in strengthening groove and strengthening groove 171 down, simultaneously, switching-over copper sheet 1 when the material pressure injection molding with plastics mold core 2, under the effect of the last top of injection molding utensil top to the reinforcement ring, the hole of reinforcement ring can be with the inboard trough rim of reinforcement ring side contact of hugging closely each other, and then realize that the reinforcement ring cramps the center of switching-over copper sheet, further improve the mechanical strength and the hypervelocity performance of cell type commutator.
In one embodiment of the present invention, the upper fixing leg 16 and the lower fixing leg 17 are provided with first through holes 161 penetrating vertically, and the first through holes 161 in the upper fixing leg 16 and the lower fixing leg 17 are in the same vertical plane. Through the arrangement of the first through hole 161, on one hand, the materials of the upper fixing leg 16 and the lower fixing leg 17 can be reduced, the cost is reduced, on the other hand, the materials can be pressed into the first through hole 161 for filling during injection, after molding, the materials at the upper end of the upper fixing leg 16 and the lower end of the lower fixing leg 17 and the materials in the dovetail groove 18 can be connected from the inside of the upper fixing leg 16 and the lower fixing leg 17, and meanwhile, the movement of the commutation copper sheet 1 in the radial direction can be limited, so that the mechanical strength and the overspeed performance of the slot type commutator are improved.
In one embodiment of the present invention, a plurality of second through holes 164 penetrating in the circumferential direction of the plastic core 2 are provided in both the upper fixing leg 16 and the lower fixing leg 17. Through the setting of second through-hole 164, can restrict the removal of switching-over copper sheet 1 along circumference, with the cooperation of first through-hole 161, can improve the cohesion between switching-over copper sheet 1 and the plastics mold core 2 from a plurality of directions, and then improve the mechanical strength and the hypervelocity performance of cell type commutator.
In an embodiment of the present invention, two sets of V-shaped grooves 162 extending in a vertical direction are symmetrically disposed on the inner side surfaces of the upper fixing leg 16 and the lower fixing leg 17. Through the setting of V type groove 162, further increase the binding point between switching-over copper sheet 1 and the plastics mold core 2, increase the cohesion.
As an embodiment of the invention, a spiral groove 14 is arranged outside the welding end 12 at two sides of the welding wire groove 13, one end of the spiral groove 14 is communicated with the welding wire groove 13, and the other end of the welding wire groove 13 extends to two sides of the welding end 12. Through the setting of helicla flute 14, can make when switching-over copper sheet 1 is rotatory, produce high-speed air current on switching-over copper sheet 1 surface through helicla flute 14, can enough blow off the welding slag that probably exists between the adjacent switching-over copper sheet 1, avoid the welding slag to get into switching-over copper sheet 1 upper end and lead to the condition of adjacent switching-over copper sheet 1 because of the existence of welding slag and contact, can carry out the forced air cooling to switching-over copper sheet 1 surface simultaneously again, avoid the condition that the heat that commutator and brush friction process produced can not in time effluvium, and then avoid the condition that switching-over copper sheet 1 high temperature produced deformation, consequently, the life of switching-over copper sheet 1 has been prolonged.
In an embodiment of the present invention, the commutation copper sheet 1 is provided with an elastic clamp 15 for clamping the mica sheet on a side facing the mica sheet, and two pins of the elastic clamp 15 are inserted into the corresponding second through hole 164 and the corresponding spiral groove 14. Through the arrangement of the elastic clamp 15, the mica sheet can be clamped on one side of the corresponding reversing copper sheet 1 before injection, so that the relative position accuracy of the reversing copper sheet 1 and the mica sheet can be ensured, the risk of contact between the adjacent reversing copper sheets 1 caused by the position deviation of the reversing copper sheet 1 and the mica sheet is avoided, the safety performance is further improved, the reversing copper sheet 1 and the mica sheet can be integrated, the mechanical strength and the overspeed performance of the reversing copper sheet 1 are further improved by utilizing the binding force between the mica sheet and the plastic mold core 2, meanwhile, two pins of the elastic clamp 15 only need to be inserted into the corresponding second through holes 164 and the spiral grooves 14, the operation is convenient, and the workload before injection can not be increased; in addition, the pins of the elastic clamp 15 inserted into the second through hole 164 can also improve the overall structural strength of the material injected into the second through hole 164, thereby improving the mechanical strength and overspeed performance of the commutator copper sheet 1.
In the description of the present invention, it is to be understood that the terms "center", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in 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 therefore, should not be taken as limiting the scope of the present invention.
While the invention has been described with reference to specific embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from its scope. Therefore, it is intended that the invention not be limited to the particular embodiment disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims (7)
1. The high-strength groove-shaped commutator is characterized by comprising commutator copper sheets (1), plastic mold cores (2) and mica sheets, wherein the commutator copper sheets (1) are uniformly distributed around the periphery of the plastic mold cores (2), gaps exist between the adjacent commutator copper sheets (1) to form insulating gaps, the mica sheets for separating the adjacent commutator copper sheets (1) are arranged in the insulating gaps, the upper end surfaces of the mica sheets are higher than the upper end surfaces of the commutator copper sheets (1) and lower than the upper end surfaces of the plastic mold cores (2), and a semi-surrounding space higher than the commutator copper sheets (1) is formed between the upper ends of the mica sheets and the upper ends of the plastic mold cores (2); the reversing copper sheet (1) comprises an integrally formed copper sheet main body (11) and a welding end (12) at the upper end of the copper sheet main body, the inner side surface of the welding end (12) is flush with the copper sheet main body (11), the outer side surface of the welding end extends outwards, and a welding line groove (13) is formed in the outer side of the welding end (12); an upper fixing foot (16) is fixedly arranged at the upper end of the inner side face of the reversing copper sheet (1), a lower fixing foot (17) is fixedly arranged at the lower end of the inner side face of the reversing copper sheet (1), and a dovetail groove (18) is formed by a gap between the upper fixing foot (16) and the lower fixing foot (17).
2. The high-strength groove-type commutator of claim 1, wherein the upper end of the upper fixing leg (16) is provided with an upper reinforcing groove (163) towards the inner side surface of the commutator copper sheet (1), and the upper reinforcing groove (163) is; and a lower reinforcing groove (171) is formed in one side, facing the inner side surface of the reversing copper sheet (1), of the lower end of the lower fixing pin (17).
3. The high-strength groove-type commutator of claim 2, wherein the upper fixing leg (16) and the lower fixing leg (17) are provided with first through holes (161) which are vertically through, and the first through holes (161) in the upper fixing leg (16) and the lower fixing leg (17) are in the same vertical plane.
4. The high-strength groove-type commutator of claim 3, wherein a plurality of second through holes (164) are formed in the upper fixing leg (16) and the lower fixing leg (17) and penetrate along the circumferential direction of the plastic mold core (2).
5. The high-strength groove-type commutator of claim 4, wherein the inner sides of the upper fixing leg (16) and the lower fixing leg (17) are symmetrically provided with two groups of V-shaped grooves (162) extending in the vertical direction.
6. A high strength groove type commutator as claimed in claim 4, wherein a spiral groove (14) is provided outside the welding end (12) at both sides of the welding groove (13), one end of the spiral groove (14) communicates with the welding groove (13), and the other end of the welding groove (13) extends to both sides of the welding end (12).
7. The high-strength groove-type commutator of claim 6, wherein the commutator copper sheet (1) is provided with an elastic clamp (15) for clamping the mica sheet on the side facing the mica sheet, and two pins of the elastic clamp (15) are respectively inserted into the corresponding second through holes (164) and the spiral grooves (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110374997.7A CN113328311A (en) | 2021-04-08 | 2021-04-08 | High-strength groove-shaped commutator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110374997.7A CN113328311A (en) | 2021-04-08 | 2021-04-08 | High-strength groove-shaped commutator |
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| CN113328311A true CN113328311A (en) | 2021-08-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110374997.7A Pending CN113328311A (en) | 2021-04-08 | 2021-04-08 | High-strength groove-shaped commutator |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202550261U (en) * | 2012-04-06 | 2012-11-21 | 宁波胜克换向器有限公司 | Commutator sheet of groove type commutator |
| CN203826739U (en) * | 2014-03-14 | 2014-09-10 | 瑞安市双峰换向器有限公司 | Brazed commutator |
| CN204258007U (en) * | 2014-12-25 | 2015-04-08 | 瑞安市百德机车部件有限公司 | A kind of commutator |
| CN205583344U (en) * | 2016-04-20 | 2016-09-14 | 瑞安市博诺机电有限公司 | Grooved reverser |
| CN205622011U (en) * | 2016-04-20 | 2016-10-05 | 瑞安市恒丰机电有限公司 | Commutator segment |
| CN106025744A (en) * | 2016-07-18 | 2016-10-12 | 瑞安市华安电器有限公司 | Commutator |
| CN108336619A (en) * | 2018-01-24 | 2018-07-27 | 张兼鸣 | Reinforced commutator |
| CN109755836A (en) * | 2019-03-07 | 2019-05-14 | 江苏利丰机电有限公司 | A kind of motor steering device of stable connection |
| CN110518424A (en) * | 2019-09-17 | 2019-11-29 | 浙江利丰电器股份有限公司 | A kind of tank commutator |
-
2021
- 2021-04-08 CN CN202110374997.7A patent/CN113328311A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202550261U (en) * | 2012-04-06 | 2012-11-21 | 宁波胜克换向器有限公司 | Commutator sheet of groove type commutator |
| CN203826739U (en) * | 2014-03-14 | 2014-09-10 | 瑞安市双峰换向器有限公司 | Brazed commutator |
| CN204258007U (en) * | 2014-12-25 | 2015-04-08 | 瑞安市百德机车部件有限公司 | A kind of commutator |
| CN205583344U (en) * | 2016-04-20 | 2016-09-14 | 瑞安市博诺机电有限公司 | Grooved reverser |
| CN205622011U (en) * | 2016-04-20 | 2016-10-05 | 瑞安市恒丰机电有限公司 | Commutator segment |
| CN106025744A (en) * | 2016-07-18 | 2016-10-12 | 瑞安市华安电器有限公司 | Commutator |
| CN108336619A (en) * | 2018-01-24 | 2018-07-27 | 张兼鸣 | Reinforced commutator |
| CN109755836A (en) * | 2019-03-07 | 2019-05-14 | 江苏利丰机电有限公司 | A kind of motor steering device of stable connection |
| CN110518424A (en) * | 2019-09-17 | 2019-11-29 | 浙江利丰电器股份有限公司 | A kind of tank commutator |
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Application publication date: 20210831 |