WO2021114833A1 - Hook-type commutator capable of preventing insulating varnish from coming off - Google Patents
Hook-type commutator capable of preventing insulating varnish from coming off Download PDFInfo
- Publication number
- WO2021114833A1 WO2021114833A1 PCT/CN2020/118458 CN2020118458W WO2021114833A1 WO 2021114833 A1 WO2021114833 A1 WO 2021114833A1 CN 2020118458 W CN2020118458 W CN 2020118458W WO 2021114833 A1 WO2021114833 A1 WO 2021114833A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- hook
- commutator
- type commutator
- bakelite powder
- insulating paint
- Prior art date
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Classifications
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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
Definitions
- the invention relates to the technical field of commutators, in particular to a hook type commutator.
- Hook-type commutator including bakelite powder base and commutating copper sheets arranged circumferentially on the outer circle of the bakelite powder base. Adjacent commutating copper sheets are insulated between the sheets through insulation grooves, and the commutating copper sheets There is a wire hook on the top. After the hook-type commutator is assembled with the rotor shaft, the welding wire hook of the commutating copper sheet needs to be spot welded with the wiring of the motor coil installed on the rotor shaft. After spot welding, the spot welding part needs to be painted and insulated .
- the excess insulating paint will inevitably flow to the top end surface of the commutator more or less, and agglomerate and freeze on the surface of the bakelite powder substrate, because the top periphery of the commutator is after the wire bonding It will be surrounded by coil wires, so the frozen insulating paint cannot be processed; and because of the hook-shaped commutator formed by injection molding, the bakelite powder matrix on the top end has a dark and smooth surface. The roughness is not more than Ra0.8. As a result, the insulation paint frozen on the surface of the bakelite powder substrate is not firmly bonded to the surface of the bakelite powder substrate.
- the insulation paint is easily removed from the top of the commutator during the high-speed rotation of the commutator.
- the end face is flaked off, and the flaked-off insulating paint will move uncontrollably inside the motor, causing serious safety hazards to the motor's work.
- the purpose of the present invention is to provide a hook that can make the insulating paint thin and firmly frozen on the top end surface after the wire bonding and paint dripping insulation treatment, and solve the technical problem of the insulating paint falling off during work.
- Type commutator
- a hook-type commutator that prevents the insulating paint from falling off, including a bakelite powder base and a commutating copper sheet arranged circumferentially on the outer circle of the bakelite powder base.
- the top of the commutating copper sheet is provided with a welding wire hook, which is adjacent
- the commutating copper plates are insulated between the plates through the insulation groove, which is characterized in that the top end of the bakelite powder substrate has an upward tapered protrusion, and the surface of the tapered protrusion has a roughness of not less than Ra12.5. surface.
- the surface roughness of the tapered protrusion is not greater than Ra25.
- the concave-convex rough surface is formed by small concave points densely arranged on the surface of the tapered convexity.
- the taper angle of the tapered protrusion is 24-32 degrees.
- the taper of the above design can make the excess insulating paint flowing to the top end surface of the commutator be well diluted and prevent agglomeration.
- the key to the innovation of the hook-type commutator of the above technical solution is to increase the area of the top end surface of the commutator through the arrangement of the conical protrusions, so that the insulating paint flowing to the top end surface is effectively diluted without agglomeration, and then Through the EDM processing of the injection mold, the injection mold forms tiny uneven marks on the inner wall of the cavity corresponding to the top end of the commutator.
- the hook-shaped commutator formed by the injection mold has the top
- the surface of the bakelite powder substrate on the end face has a high surface roughness, so that when the hook-type commutator is processed for wire bonding and dripping insulation, the excess insulating paint flowing to the top end of the commutator will be diluted and frozen. It can form a firm combination with the bakelite powder matrix, effectively prevent the commutator from falling off during operation, and thereby eliminate the safety hazards of the motor.
- Figure 1 is a schematic diagram of the structure of the present invention
- Figure 2 is a state diagram of the present invention during spot welding and paint dripping insulation treatment.
- the hook-type commutator for preventing the insulating paint from falling off of the present invention includes a bakelite powder base 6 and a commutating copper sheet 5 arranged circumferentially on the outer circle of the bakelite powder base 6, and the commutating copper
- the top of the sheet 5 is provided with a wire-welding hook 4, and the adjacent reversing copper sheets 5 are insulated between the sheets through the insulation groove 1.
- the top end of the bakelite base 6 has an upward tapered protrusion 3, a tapered protrusion
- the taper angle of the cone 3 is 24-32 degrees
- the surface of the tapered protrusion 3 has a rough surface with a roughness of not less than Ra12.5 and not greater than Ra25.
- the uneven surface is formed by densely arranged small surfaces on the surface of the tapered protrusion 3.
- the pit 2 is formed.
- the hook-type commutator of the present invention when performing winding spot welding and dripping insulation treatment, the working state of the hook-type commutator is that the top is set diagonally downward, and the excess insulating paint will flow to the changer.
- the tapered protrusions enable the insulating paint to be effectively diluted without agglomeration, and the high roughness of the tapered protrusion surface enables the insulating paint to form a firm bond with the bakelite powder matrix after freezing.
Landscapes
- Motor Or Generator Current Collectors (AREA)
Abstract
Disclosed is a hook-type commutator capable of preventing insulating varnish from coming off. The hook-type commutator comprises a Bakelite powder base body (6), and commutation copper sheets (5) circumferentially arranged at the periphery of the Bakelite powder base body (6), wherein a welding wire hook (4) is arranged at the top of each of the commutation copper sheets (5), insulation between adjacent commutation copper sheets (5) is achieved by means of insulating grooves (1), the top end surface of the Bakelite powder base body (6) is provided with upward conical protrusions (3), and surfaces of the conical protrusions (3) are provided with concave-convex rough surfaces of which the roughness is not less than Ra12.5. After the commutator is subjected to wire welding and a varnish dripping insulation treatment, insulating varnish can be thinned and firmly frozen on the top end surface of the commutator, and the insulating varnish can be effectively prevented from coming off when the commutator operates.
Description
本发明涉及换向器技术领域，具体涉及一种钩型换向器。The invention relates to the technical field of commutators, in particular to a hook type commutator.
钩型换向器，包括电木粉基体和在电木粉基体的外圆作圆周排布的换向铜片，相邻换向铜片之间通过绝缘槽进行片间绝缘，换向铜片的顶部设有焊线弯钩。钩型换向器与转子轴装配后，换向铜片的焊线弯钩需要与转子轴上安装的电机线圈的接线进行点焊焊接，点焊后还要在点焊部位作滴漆绝缘处理。但在作滴漆绝缘处理时，多余绝缘漆不可避免会或多或少流到换向器的顶部端面，并结块冻结在电木粉基体表面，因为换向器的顶部周边在焊线后会被线圈导线围住，所以冻结的绝缘漆没有办法得到处理；并且由于通过压注模具成型的钩型换向器，其顶部端面的电木粉基体本身就具有暗泽的光滑表面，其表面粗糙度不大于Ra0.8。这样一来，在电木粉基体表面冻结的绝缘漆与电木粉基体表面的结合牢固度就不够，于是在换向器工作时的高速转动过程中，绝缘漆就容易从换向器的顶部端面呈片状脱落，片状脱落的绝缘漆会在电机内部不可控移动，对电机工作造成严重的安全隐患。Hook-type commutator, including bakelite powder base and commutating copper sheets arranged circumferentially on the outer circle of the bakelite powder base. Adjacent commutating copper sheets are insulated between the sheets through insulation grooves, and the commutating copper sheets There is a wire hook on the top. After the hook-type commutator is assembled with the rotor shaft, the welding wire hook of the commutating copper sheet needs to be spot welded with the wiring of the motor coil installed on the rotor shaft. After spot welding, the spot welding part needs to be painted and insulated . However, during the dripping insulation treatment, the excess insulating paint will inevitably flow to the top end surface of the commutator more or less, and agglomerate and freeze on the surface of the bakelite powder substrate, because the top periphery of the commutator is after the wire bonding It will be surrounded by coil wires, so the frozen insulating paint cannot be processed; and because of the hook-shaped commutator formed by injection molding, the bakelite powder matrix on the top end has a dark and smooth surface. The roughness is not more than Ra0.8. As a result, the insulation paint frozen on the surface of the bakelite powder substrate is not firmly bonded to the surface of the bakelite powder substrate. Therefore, the insulation paint is easily removed from the top of the commutator during the high-speed rotation of the commutator. The end face is flaked off, and the flaked-off insulating paint will move uncontrollably inside the motor, causing serious safety hazards to the motor's work.
鉴于现有技术的不足，本发明的目的是在于提供一种可使在进行焊线、滴漆绝缘处理后，绝缘漆能够摊薄并牢固冻结在顶部端面，解决工作时绝缘漆脱落技术问题的钩型换向器。In view of the shortcomings of the prior art, the purpose of the present invention is to provide a hook that can make the insulating paint thin and firmly frozen on the top end surface after the wire bonding and paint dripping insulation treatment, and solve the technical problem of the insulating paint falling off during work. Type commutator.
本发明是通过以下技术方案来实施的：The present invention is implemented through the following technical solutions:
防绝缘漆脱落的钩型换向器，包括电木粉基体和在电木粉基体的外圆作圆周排布的换向铜片，换向铜片的顶部设有焊线弯钩，相邻换向铜片之间通过绝缘槽进行片间绝缘，其特征在于：电木粉基体的顶部端面具有向上的锥形凸起，锥形凸起的表面具有粗糙度不小于Ra12.5的凹凸糙面。A hook-type commutator that prevents the insulating paint from falling off, including a bakelite powder base and a commutating copper sheet arranged circumferentially on the outer circle of the bakelite powder base. The top of the commutating copper sheet is provided with a welding wire hook, which is adjacent The commutating copper plates are insulated between the plates through the insulation groove, which is characterized in that the top end of the bakelite powder substrate has an upward tapered protrusion, and the surface of the tapered protrusion has a roughness of not less than Ra12.5. surface.
作为优选，所述锥形凸起的表面粗糙度不大于Ra25。Preferably, the surface roughness of the tapered protrusion is not greater than Ra25.
作为优选，所述凹凸糙面由在锥形凸起表面密布设置的小凹点所形成。Preferably, the concave-convex rough surface is formed by small concave points densely arranged on the surface of the tapered convexity.
作为优选，所述锥形凸起的锥角为24-32度。上述设计的锥度可使流到换向器顶部端面的多余绝缘漆能够得到很好的摊薄，防止出现结块。Preferably, the taper angle of the tapered protrusion is 24-32 degrees. The taper of the above design can make the excess insulating paint flowing to the top end surface of the commutator be well diluted and prevent agglomeration.
上述技术方案的钩型换向器，其创新关键在于，首先通过锥形凸起的设置增加换向器顶部端面的面积，使流到顶部端面的绝缘漆被有效摊薄不会出现结块，然后通过对压注模具进行电火花加工处理，使压注模具在对应换向器顶部端面的模腔内壁形成微小的凹凸痕迹，这样一来，通过压注模具成型的钩型换向器，其顶部端面的电木粉基体表面就具有高的表面粗糙度，这样钩型换向器在进行焊线、滴漆绝缘处理时，流到换向器顶部端面的多余绝缘漆会被摊薄并在冻结后能够与电木粉基体形成牢固结合，有效防止换向器工作时的脱落，进而消除电机工作的安全隐患。The key to the innovation of the hook-type commutator of the above technical solution is to increase the area of the top end surface of the commutator through the arrangement of the conical protrusions, so that the insulating paint flowing to the top end surface is effectively diluted without agglomeration, and then Through the EDM processing of the injection mold, the injection mold forms tiny uneven marks on the inner wall of the cavity corresponding to the top end of the commutator. In this way, the hook-shaped commutator formed by the injection mold has the top The surface of the bakelite powder substrate on the end face has a high surface roughness, so that when the hook-type commutator is processed for wire bonding and dripping insulation, the excess insulating paint flowing to the top end of the commutator will be diluted and frozen. It can form a firm combination with the bakelite powder matrix, effectively prevent the commutator from falling off during operation, and thereby eliminate the safety hazards of the motor.
本发明有以下附图：The present invention has the following drawings:
图1为本发明的结构示意图，Figure 1 is a schematic diagram of the structure of the present invention,
图2为本发明在进行点焊、滴漆绝缘处理时的状态图。Figure 2 is a state diagram of the present invention during spot welding and paint dripping insulation treatment.
如图1所示，本发明的防绝缘漆脱落的钩型换向器，包括电木粉基体6和在电木粉基体6的外圆作圆周排布的换向铜片5，换向铜片5的顶部设有焊线弯钩4，相邻换向铜片5之间通过绝缘槽1进行片间绝缘，电木粉基体6的顶部端面具有向上的锥形凸起3，锥形凸起3的锥角为24-32度，锥形凸起3的表面具有粗糙度不小于Ra12.5、不大于Ra25的凹凸糙面，凹凸糙面由在锥形凸起3表面密布设置的小凹点2所形成。As shown in Figure 1, the hook-type commutator for preventing the insulating paint from falling off of the present invention includes a bakelite powder base 6 and a commutating copper sheet 5 arranged circumferentially on the outer circle of the bakelite powder base 6, and the commutating copper The top of the sheet 5 is provided with a wire-welding hook 4, and the adjacent reversing copper sheets 5 are insulated between the sheets through the insulation groove 1. The top end of the bakelite base 6 has an upward tapered protrusion 3, a tapered protrusion The taper angle of the cone 3 is 24-32 degrees, the surface of the tapered protrusion 3 has a rough surface with a roughness of not less than Ra12.5 and not greater than Ra25. The uneven surface is formed by densely arranged small surfaces on the surface of the tapered protrusion 3. The pit 2 is formed.
如图2所示，本发明的钩型换向器，在进行绕线点焊、滴漆绝缘处理时，钩型换向器的工作状态是顶部斜向下设置，多余绝缘漆会流到换向器的顶部端面，锥形凸起使绝缘漆能够被有效摊薄不会出现结块，锥形凸起表面的高粗糙度则使绝缘漆在冻结后能够与电木粉基体形成牢固结合。As shown in Figure 2, the hook-type commutator of the present invention, when performing winding spot welding and dripping insulation treatment, the working state of the hook-type commutator is that the top is set diagonally downward, and the excess insulating paint will flow to the changer. On the top end surface of the deflector, the tapered protrusions enable the insulating paint to be effectively diluted without agglomeration, and the high roughness of the tapered protrusion surface enables the insulating paint to form a firm bond with the bakelite powder matrix after freezing.
Claims (4)
- 防绝缘漆脱落的钩型换向器，包括电木粉基体和在电木粉基体的外圆作圆周排布的换向铜片，换向铜片的顶部设有焊线弯钩，相邻换向铜片之间通过绝缘槽进行片间绝缘，其特征在于：电木粉基体的顶部端面具有向上的锥形凸起，锥形凸起的表面具有粗糙度不小于Ra12.5的凹凸糙面。A hook-type commutator that prevents the insulating paint from falling off, including a bakelite powder base and a commutating copper sheet arranged circumferentially on the outer circle of the bakelite powder base. The top of the commutating copper sheet is provided with a welding wire hook, which is adjacent The commutating copper plates are insulated between the plates through the insulation groove, which is characterized in that the top end of the bakelite powder substrate has an upward tapered protrusion, and the surface of the tapered protrusion has a roughness of not less than Ra12.5. surface.
- 如权利要求1所述的防绝缘漆脱落的钩型换向器，其特征在于：所述锥形凸起的表面粗糙度不大于Ra25。The hook-type commutator for preventing the insulating paint from falling off according to claim 1, wherein the surface roughness of the tapered protrusion is not greater than Ra25.
- 如权利要求1或2所述的防绝缘漆脱落的钩型换向器，其特征在于：所述凹凸糙面由在锥形凸起表面密布设置的小凹点所形成。The hook-type commutator for preventing the insulating paint from falling off according to claim 1 or 2, wherein the concave-convex rough surface is formed by small concave points densely arranged on the surface of the tapered convexity.
- 如权利要求1所述的防绝缘漆脱落的钩型换向器，其特征在于：所述锥形凸起的锥角为24-32度。The hook-type commutator for preventing the insulating paint from falling off according to claim 1, wherein the taper angle of the tapered protrusion is 24-32 degrees.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911258279.2 | 2019-12-10 | ||
| CN201911258279.2A CN110854636A (en) | 2019-12-10 | 2019-12-10 | Hook-shaped commutator for preventing insulating paint from falling off |
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| Publication Number | Publication Date |
|---|---|
| WO2021114833A1 true WO2021114833A1 (en) | 2021-06-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/CN2020/118458 WO2021114833A1 (en) | 2019-12-10 | 2020-09-28 | Hook-type commutator capable of preventing insulating varnish from coming off |
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| CN (1) | CN110854636A (en) |
| WO (1) | WO2021114833A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110854636A (en) * | 2019-12-10 | 2020-02-28 | 安固集团有限公司 | Hook-shaped commutator for preventing insulating paint from falling off |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203085941U (en) * | 2013-02-04 | 2013-07-24 | 吴清照 | End face commutator copper sheet |
| CN207217970U (en) * | 2017-09-20 | 2018-04-10 | 浙江聚利电动工具有限公司 | A kind of Hooked reverser |
| EP3334016A2 (en) * | 2016-12-08 | 2018-06-13 | Askoll Holding S.r.l. a socio unico | Improved commutator, aluminum winding rotor comprising said improved commutator and universal motor comprising said aluminum winding motor |
| CN110854636A (en) * | 2019-12-10 | 2020-02-28 | 安固集团有限公司 | Hook-shaped commutator for preventing insulating paint from falling off |
| CN210779401U (en) * | 2019-12-10 | 2020-06-16 | 安固集团有限公司 | Hook-shaped commutator for preventing insulating paint from falling off |
-
2019
- 2019-12-10 CN CN201911258279.2A patent/CN110854636A/en active Pending
-
2020
- 2020-09-28 WO PCT/CN2020/118458 patent/WO2021114833A1/en active Application Filing
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203085941U (en) * | 2013-02-04 | 2013-07-24 | 吴清照 | End face commutator copper sheet |
| EP3334016A2 (en) * | 2016-12-08 | 2018-06-13 | Askoll Holding S.r.l. a socio unico | Improved commutator, aluminum winding rotor comprising said improved commutator and universal motor comprising said aluminum winding motor |
| CN207217970U (en) * | 2017-09-20 | 2018-04-10 | 浙江聚利电动工具有限公司 | A kind of Hooked reverser |
| CN110854636A (en) * | 2019-12-10 | 2020-02-28 | 安固集团有限公司 | Hook-shaped commutator for preventing insulating paint from falling off |
| CN210779401U (en) * | 2019-12-10 | 2020-06-16 | 安固集团有限公司 | Hook-shaped commutator for preventing insulating paint from falling off |
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| CN110854636A (en) | 2020-02-28 |
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