CN106787390B - Brush DC motor - Google Patents
Brush DC motor Download PDFInfo
- Publication number
- CN106787390B CN106787390B CN201710040285.5A CN201710040285A CN106787390B CN 106787390 B CN106787390 B CN 106787390B CN 201710040285 A CN201710040285 A CN 201710040285A CN 106787390 B CN106787390 B CN 106787390B
- Authority
- CN
- China
- Prior art keywords
- bearing
- commutator
- rotor shaft
- reversing copper
- reversing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 51
- 229910052802 copper Inorganic materials 0.000 claims description 50
- 239000010949 copper Substances 0.000 claims description 50
- 230000003014 reinforcing effect Effects 0.000 claims description 10
- 229920001342 Bakelite® Polymers 0.000 claims description 3
- 239000004637 bakelite Substances 0.000 claims description 3
- 238000009413 insulation Methods 0.000 claims description 3
- 239000000843 powder Substances 0.000 claims description 3
- 238000001746 injection moulding Methods 0.000 claims 1
- 230000017525 heat dissipation Effects 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 239000011159 matrix material Substances 0.000 description 9
- 239000004033 plastic Substances 0.000 description 9
- 239000000463 material Substances 0.000 description 5
- 238000003825 pressing Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
- H02K5/161—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields radially supporting the rotary shaft at both ends of the rotor
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K23/00—DC commutator motors or generators having mechanical commutator; Universal AC/DC commutator motors
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc Machiner (AREA)
Abstract
The invention discloses a brush direct current motor, two ends of a motor shell are fixedly connected with a left end cover and a right end cover, the left end cover is provided with a left bearing positioning hole and a left bearing, the right end cover is provided with a right bearing positioning hole and a right bearing, the left shaft end of a rotor shaft is rotatably supported by the left bearing, the right shaft end of the rotor shaft is rotatably supported by the right bearing, and the brush direct current motor is characterized in that: the right side terminal surface of right side bearing inner race carries out the axial spacing by the step of right bearing locating hole, and the left side terminal surface of right bearing inner race carries out the axial spacing by locating the epaxial for the axle retaining ring of rotor, is equipped with conical spring between left bearing and the commutator, and conical spring's tip offsets with the right side terminal surface of left bearing inner race, and big head end offsets with the bottom terminal surface of commutator, and the left side terminal surface of left bearing inner race is spacing by the step of left bearing locating hole. The invention has the advantages of reliable axial positioning of the rotor shaft, simple manufacturing process, light weight, low cost, firm structure, good heat dissipation performance and meeting the high-rotation-speed working requirement of the commutator.
Description
Technical Field
The invention relates to an improved invention of a brush direct current motor.
Background
The brush direct current motor in the prior art mainly has the following defects: 1. the axial positioning of the rotor shaft is not particularly reliable, and the axial movement amount is large when the motor works; 2. the commutator has heavy weight and poor heat dissipation performance, and the factors directly influence the high-rotation-speed working requirement of the brush direct-current motor; 3. the manufacturing process of the commutator is complex and the cost is high. The commutator in the prior art comprises a plastic matrix and commutating copper sheets uniformly arranged on the outer circumference of the plastic matrix, wherein the inner side surface of the commutating copper sheet is provided with a hook foot which is implanted into the plastic matrix to be combined with the plastic matrix and is formed by a cold stamping process, so that the commutating copper sheet is complex in manufacturing process, heavy in weight, high in material consumption and high in cost; the plastic matrix is combined with the hook leg, so the plastic matrix is arranged at the full height of the reversing copper sheet, and therefore, the plastic matrix is heavy in weight, high in material consumption and high in cost, and meanwhile, the heat dissipation performance of the reverser is reduced; in addition, because the weight and the moment of inertia of the reversing copper sheet are large, in order to improve the structural firmness of the reverser, the inner side surface of the reversing copper sheet is often provided with a reinforcing ring groove in the up-down direction for placing a reinforcing ring, so that the reverser has more complex structure and increases the cost; in addition, the hook of the reversing copper sheet often generates a reverse discharge phenomenon during welding wires, so that the quality of the welding wires is poor, and the service life of the motor is influenced.
Disclosure of Invention
In view of the defects of the prior art, the invention aims to provide the brush direct current motor with the rotor shaft reliably positioned axially, and the commutator has the advantages of simple manufacturing process, light weight, low cost, firm structure and good heat dissipation performance, and meets the high-rotation-speed working requirement.
The invention is completed by adopting the following technical scheme:
the utility model provides a brush direct current motor, including motor housing and stator part, the rotor part of locating in the motor housing, motor housing's both ends fixed connection left and right sides end cover, the left end cover is equipped with left bearing locating hole, left bearing locating hole is interior to install left bearing, the right end cover is equipped with right bearing locating hole, right bearing installs right bearing in the right bearing locating hole, rotor part includes the rotor shaft and is fixed in the commutator on the rotor shaft, the left axle head of rotor shaft carries out slewing bearing by left bearing, the right axle head of rotor shaft carries out slewing bearing by right bearing, its characterized in that: the right side terminal surface of right side bearing inner race carries out the axial spacing by the step of right bearing locating hole, and the left side terminal surface of right bearing inner race carries out the axial spacing by locating the epaxial for the axle retaining ring of rotor, is equipped with conical spring between left bearing and the commutator, and conical spring's tip offsets with the right side terminal surface of left bearing inner race, and big head end offsets with the bottom terminal surface of commutator, and the left side terminal surface of left bearing inner race is spacing by the step of left bearing locating hole.
After the technical scheme is adopted, the rotor shaft is reliably axially positioned by utilizing the compression of the conical spring, and the axial movement amount is small when the motor works, so that the high-rotating-speed working requirement of the brush direct-current motor is effectively ensured.
Preferably, the commutator comprises a reversing copper sheet which surrounds a cylinder, the inner side surface and the outer side surface of the reversing copper sheet are smooth cylindrical surfaces, an insulation gap is reserved between every two adjacent reversing copper sheets, a hook is arranged at the top of each reversing copper sheet, the top of each reversing copper sheet is connected with an upper cover, the upper cover and the reversing copper sheet are integrally molded in a pressing mode, the outer diameter of the upper cover is larger than that of the cylinder to form an upper reinforcing ring of each reversing copper sheet, the bottom of each reversing copper sheet is connected with a lower cover, and the outer diameter of the lower cover is larger than that of the cylinder to form a lower reinforcing ring of each reversing copper sheet.
After the technical scheme is adopted, the structure of the commutator is greatly optimized, 1. The inner side surface of the commutating copper sheet does not need to be provided with hook legs, the manufacturing process is simple, the weight is light, the cost is low, and the rotational inertia of the commutating copper sheet is small; 2. the upper cover and the lower cover replace a plastic matrix, and only the contact distance between the reversing copper sheet and the carbon brush is needed to be considered between the upper cover and the lower cover without being considered to be combined with the hook leg, so that the upper cover and the lower cover are not needed to be arranged by the whole height of the reversing copper sheet, and compared with the plastic matrix, the upper cover and the lower cover are light in weight, less in material consumption and low in cost, and meanwhile, the middle part of the reversing copper sheet is completely hollowed-out, so that the heat dissipation performance of the commutator is improved; 3. the outer diameter of the upper cover and the lower cover is larger than that of the cylinder, namely the upper cover and the lower cover can also clamp the reversing copper sheet from the outer side direction of the reversing copper sheet to directly form an upper reinforcing ring and a lower reinforcing ring of the reversing copper sheet, so that the structural firmness of the reverser is improved; 4. the commutator has light weight, firm structure and good heat dissipation performance, and meanwhile, the rotary inertia of the commutating copper sheet is small, so that the high-rotation-speed working requirement of the direct-current motor can be better met.
Preferably, the top of the outer circle of the upper cover is in abutting contact with the inner side of the hook. Through above-mentioned design, the upper cover can give the crotch support from the crotch inboard when the bonding wire, avoids the crotch to produce the phenomenon of arranging upside down, guarantees bonding wire quality, and then guarantees motor life-span.
Preferably, the adjacent side surfaces of the reversing copper sheets are provided with arc-shaped recesses. Through the design, firstly, the weight of the reversing copper sheet can be reduced, and meanwhile, the manufacturing process of the reversing copper sheet cannot be complicated (because the reversing copper sheet is mostly formed by a copper wire by adopting a stretching process); and secondly, the bonding strength between the reversing copper sheet and the upper cover and the lower cover can be increased.
Drawings
The invention has the following drawings:
figure 1 is a schematic diagram of a brushed dc motor,
figure 2 is a top directional view of the commutator,
figure 3 is A-A view of figure 2,
fig. 4 is a B-B view of fig. 3.
Detailed Description
As shown in the figure, the brush direct current motor comprises a motor shell 1, a stator part 2 and a rotor part which are arranged in the motor shell, wherein the two ends of the motor shell 1 are fixedly connected with a left end cover and a right end cover, a left bearing positioning hole is formed in the left end cover 7, a left bearing 10 is arranged in the left bearing positioning hole, a right bearing positioning hole is formed in the right end cover 3, a right bearing 4 is arranged in the right bearing positioning hole, the rotor part comprises a rotor shaft 5 and a commutator 8 which is fixed on the rotor shaft, the left shaft end of the rotor shaft 5 is rotatably supported by the left bearing 10, the right shaft end of the rotor shaft 5 is rotatably supported by the right bearing 4, the right end face of the outer ring of the right bearing 4 is axially limited by a step of the right bearing positioning hole, a conical spring 9 is arranged between the left end face of the inner ring of the right bearing 4 and the commutator 8, the small head end of the conical spring 9 is propped against the right end face of the inner ring of the left bearing 10, the large head end is propped against the bottom end face of the commutator 8, and the left end face of the left bearing 10 is limited by the step of the left bearing positioning hole. The commutator 8 comprises twenty-two reversing copper sheets 83 which encircle a cylinder, the inner side surface and the outer side surface of each reversing copper sheet 83 are smooth cylindrical surfaces, an insulation gap 86 is reserved between every two adjacent reversing copper sheets 83, an arc-shaped concave groove 85 is formed in the adjacent side surfaces of each reversing copper sheet 83, a hook 84 is arranged at the top of each reversing copper sheet 83, the top of each reversing copper sheet 83 is connected with an upper cover 81, the upper covers 81 are made of bakelite powder materials, the upper covers 81 and the reversing copper sheets 83 are integrally molded in a pressing mode, the outer diameter of each upper cover 81 is larger than that of the cylinder to form an upper reinforcing ring of each reversing copper sheet 83, the bottom of each reversing copper sheet 83 is connected with a lower cover 82, the lower cover 82 is made of bakelite powder materials, the outer diameter of each lower cover 82 is larger than that of the cylinder to form a lower reinforcing ring of each reversing copper sheet 83, and the outer circle top of each upper cover 81 is in contact with the inner side of the hook 84 in a pressing mode.
Claims (3)
1. The utility model provides a brush direct current motor, including motor housing and stator part, the rotor part of locating in the motor housing, motor housing's both ends fixed connection left and right sides end cover, the left end cover is equipped with left bearing locating hole, left bearing locating hole is interior to install left bearing, the right end cover is equipped with right bearing locating hole, right bearing installs right bearing in the right bearing locating hole, rotor part includes the rotor shaft and is fixed in the commutator on the rotor shaft, the left axle head of rotor shaft carries out slewing bearing by left bearing, the right axle head of rotor shaft carries out slewing bearing by right bearing, its characterized in that: the right end face of the outer ring of the right bearing is axially limited by a step of a positioning hole of the right bearing, the left end face of the inner ring of the right bearing is axially limited by a retainer ring for a shaft arranged on a rotor shaft, a conical spring is arranged between the left bearing and a commutator, the small end of the conical spring abuts against the right end face of the inner ring of the left bearing, the big end abuts against the bottom end face of the commutator, and the left end face of the outer ring of the left bearing is limited by the step of the positioning hole of the left bearing; the commutator comprises reversing copper sheets which encircle a cylinder, the inner side surface and the outer side surface of each reversing copper sheet are smooth cylindrical surfaces, an insulation gap is reserved between every two adjacent reversing copper sheets, hooks are arranged at the tops of the reversing copper sheets, the tops of the reversing copper sheets are connected with an upper cover, the upper cover and the reversing copper sheets are integrally molded by injection molding, the upper cover is made of bakelite powder, the outer diameter of the upper cover is larger than that of the cylinder to form an upper reinforcing ring of the reversing copper sheets, the bottom of each reversing copper sheet is connected with a lower cover, and the outer diameter of the lower cover is larger than that of the cylinder to form a lower reinforcing ring of the reversing copper sheets.
2. The brushed dc motor of claim 1 wherein: the top of the outer circle of the upper cover is propped against the inner side of the hook.
3. The brushed dc motor of claim 1 wherein: and arc-shaped concave grooves are formed in the adjacent side surfaces of the reversing copper sheets.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710040285.5A CN106787390B (en) | 2017-01-20 | 2017-01-20 | Brush DC motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710040285.5A CN106787390B (en) | 2017-01-20 | 2017-01-20 | Brush DC motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106787390A CN106787390A (en) | 2017-05-31 |
| CN106787390B true CN106787390B (en) | 2024-03-01 |
Family
ID=58944318
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710040285.5A Active CN106787390B (en) | 2017-01-20 | 2017-01-20 | Brush DC motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106787390B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111313622A (en) * | 2020-03-24 | 2020-06-19 | 浙江联宜电机有限公司 | Carbon powder overstock prevention direct current motor for barrier gate |
| CN115664064B (en) * | 2022-12-26 | 2023-06-02 | 常州市凯迪电器股份有限公司 | Lifting upright post device using permanent magnet direct current motor |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2563823Y (en) * | 2002-08-29 | 2003-07-30 | 李金东 | Permanent magnetic DC motor |
| JP2007267456A (en) * | 2006-03-27 | 2007-10-11 | Oki Micro Giken Kk | Commutator of direct-current motor |
| CN201234189Y (en) * | 2008-06-13 | 2009-05-06 | 浙江金达电机电器有限公司 | Miniature DC motor |
| CN202495668U (en) * | 2012-04-07 | 2012-10-17 | 浙江科固电器有限公司 | Plastic case for compression molding of commutator |
| CN203707536U (en) * | 2013-12-31 | 2014-07-09 | 宁波胜克换向器有限公司 | Powder forming carbon surface commutator |
| CN204067796U (en) * | 2014-08-20 | 2014-12-31 | 浙江聚利电动工具有限公司 | Hooked reverser commutator segment |
| CN204464717U (en) * | 2015-03-24 | 2015-07-08 | 浙江卓进电器有限公司 | Band reinforcing ring Hooked reverser |
| CN206452229U (en) * | 2017-01-20 | 2017-08-29 | 陈振宁 | Brushed DC motor |
-
2017
- 2017-01-20 CN CN201710040285.5A patent/CN106787390B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2563823Y (en) * | 2002-08-29 | 2003-07-30 | 李金东 | Permanent magnetic DC motor |
| JP2007267456A (en) * | 2006-03-27 | 2007-10-11 | Oki Micro Giken Kk | Commutator of direct-current motor |
| CN201234189Y (en) * | 2008-06-13 | 2009-05-06 | 浙江金达电机电器有限公司 | Miniature DC motor |
| CN202495668U (en) * | 2012-04-07 | 2012-10-17 | 浙江科固电器有限公司 | Plastic case for compression molding of commutator |
| CN203707536U (en) * | 2013-12-31 | 2014-07-09 | 宁波胜克换向器有限公司 | Powder forming carbon surface commutator |
| CN204067796U (en) * | 2014-08-20 | 2014-12-31 | 浙江聚利电动工具有限公司 | Hooked reverser commutator segment |
| CN204464717U (en) * | 2015-03-24 | 2015-07-08 | 浙江卓进电器有限公司 | Band reinforcing ring Hooked reverser |
| CN206452229U (en) * | 2017-01-20 | 2017-08-29 | 陈振宁 | Brushed DC motor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106787390A (en) | 2017-05-31 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20240125 Address after: 325200 Anshi International Automobile and Motorcycle Parts Industrial Park, Wenzhou City, Zhejiang Province Applicant after: ZHEJIANG JUGUANG AUTOMOBILE PARTS Co.,Ltd. Country or region after: China Address before: Room 204, Unit 7, Building 1, Yuhai Street, Yuhai Street, Rui'an City, Wenzhou City, Zhejiang Province, 325200 Applicant before: Chen Zhenning Country or region before: China |
|
| TA01 | Transfer of patent application right | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |