CN212909169U - Permanent magnet direct current motor cover body assembly and motor with same - Google Patents
Permanent magnet direct current motor cover body assembly and motor with same Download PDFInfo
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- CN212909169U CN212909169U CN202022320847.1U CN202022320847U CN212909169U CN 212909169 U CN212909169 U CN 212909169U CN 202022320847 U CN202022320847 U CN 202022320847U CN 212909169 U CN212909169 U CN 212909169U
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- motor
- cover body
- connecting piece
- permanent magnet
- contact
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Abstract
The invention provides a permanent magnet direct current motor cover body assembly which comprises a motor cover body, and a positive pole connecting piece and a negative pole connecting piece which are fixed on the motor cover body, wherein the head part of the positive pole connecting piece is in contact with and realizes electric connection with the root part of a positive pole electric brush fixed on the motor cover body, the tail part of the positive pole connecting piece extends to the outer end face of the motor cover body and serves as a positive pole access end connected with the positive pole of a battery, the head part of the negative pole connecting piece is in contact with and realizes electric connection with the root part of a negative pole electric brush fixed on the motor cover body, and the tail part of the negative pole connecting piece extends to the outside of the side wall of the motor cover body and serves as a negative pole access end in. According to the cover body assembly of the permanent magnet direct current motor, the contact type electric connection is adopted to replace the welding type electric connection, so that the reliability and the stability of the electric connection are improved, the assembly and production cost is reduced, and the production efficiency is improved.
Description
Technical Field
The invention relates to a motor, in particular to a cover body assembly of a permanent magnet direct current motor and a motor with the cover body assembly.
Background
The motor is mainly used for generating driving torque and is used as a power source of electric appliances or various machines. The permanent magnet DC motor consists of stator magnetic pole, rotor, electric brush, casing, etc. the stator magnetic pole is permanent magnet made of ferrite, Al-Ni-Co, Nd-Fe-B, etc. The structure can be divided into a cylinder type, a tile type and the like. Most of the electric motors used in recorders are cylindrical magnets, and most of the electric motors used in electric tools and automotive electric appliances are special block magnets. The rotor is generally formed by laminating silicon steel sheets, and the number of the grooves of the rotor is less than that of the rotor of the electromagnetic direct-current motor. The brush is a conductive part for connecting a power supply and a rotor winding and has two performances of conductivity and wear resistance. The electric brush of the permanent magnet motor uses a single metal sheet or a metal graphite electric brush or an electrochemical graphite electric brush.
The electrode of the traditional direct current motor is connected with the electric brush through welding, and then is connected with the electrode through a lead with a switch in a welding way, and the lead is connected with the battery, so that a loop is formed; the welding is inconvenient, the assembly efficiency is low, and meanwhile, the cold joint or the welding part is easy to fall off, the electric connection is influenced, and the normal work of the motor is further influenced
Disclosure of Invention
【1】 Technical problem to be solved
The invention aims to provide a cover body assembly of a permanent magnet direct current motor and a motor with the cover body assembly, wherein the cover body assembly is compact in structure, free of welding, stable in connection and capable of being directly connected with a battery anode.
【2】 Technical scheme for solving problems
The invention provides a permanent magnet direct current motor cover body assembly which comprises a motor cover body 1, and a positive pole connecting piece 3 and a negative pole connecting piece 4 which are fixed on the motor cover body 1, wherein the head part of the positive pole connecting piece is in contact with and realizes electric connection with the root part of a positive pole electric brush 21 fixed on the motor cover body 1, the tail part of the positive pole connecting piece extends to the outer end surface of the motor cover body and serves as a positive pole access end connected with the positive pole of a battery, the head part of the negative pole connecting piece 4 is in contact with and realizes electric connection with the root part of a negative pole electric brush 22 fixed on the motor cover body 1, and the tail part of the negative pole connecting piece extends to the outside of the side wall of the motor cover body and serves as a negative pole access end.
Further, the positive brush and/or the negative brush are L-shaped.
Further, the border of motor lid body 1 is equipped with the annular bulge and forms the installation department that is used for being connected with the motor casing, form the installing zone in the installation department, the lateral wall of installing zone is equipped with the appearance the positive pole brush or the electrode draw-in groove that the root card of negative pole brush goes into.
Further, a tab slot 100 into which the connection end of the positive tab or the negative tab is inserted is formed in the side wall of the electrode card slot.
Further, the negative pole tab 4 comprises a first tab 41 inserted into the tab slot, an end of the first tab extends to the end of the annular protrusion and is bent outward to form a first connecting portion, and an end of the first connecting portion is bent toward the outer wall of the annular protrusion and forms a second tab 431 for contacting with the inner wall of the motor housing to realize electrical connection.
Further, the positive pole contact piece 3 comprises a third contact piece 33 contacted with the root of the positive pole brush, the third contact piece penetrates through the motor cover body and extends to the other end of the motor cover body, the end part of the third contact piece is bent inwards in the radial direction to form a second connecting part 32, and the end part of the second connecting part is provided with a fourth contact piece 31 which is coaxial with the motor cover body and is used for being contacted with the positive pole of the battery.
Furthermore, the central hole is a stepped hole, and a gasket 6 is arranged between the bearing sleeve and the stepped surface of the stepped hole.
Further, the outer end face center of the motor cover body is provided with a cylindrical boss 11, and the end face of the cylindrical boss is provided with a concave hole for accommodating the tail part of the positive electrode connecting piece to be sleeved in.
Further, a gap is formed between the tail part of the positive electrode connecting piece and the bottom surface of the concave hole.
Meanwhile, the invention also provides a motor which uses the permanent magnet direct current motor cover body assembly.
【3】 Advantageous effects
According to the permanent magnet direct current motor cover body assembly, the brush and the splicing structure are optimally designed again, and the contact type electric connection is adopted to replace the traditional welding type electric connection, so that the reliability and the stability of the electric connection are improved, the assembly and production cost is reduced, and the production efficiency is improved; the negative pole is in contact connection with the motor shell through the connecting piece, so that the electric connection reliability is improved, the connection is convenient and fast, and the assembly is simple; the positive electrode is led to the outer side of the cover body through the contact piece to be used as a contact piece directly connected with the positive electrode of the battery, the structure is compact, and the connection effect is good; meanwhile, the motor adopting the cover body assembly has reliable and stable contact between the electric brush and the commutator, thereby meeting the special and simplified contact requirement and brush insertion requirement of the portable electric appliance; the U-shaped design of the negative electrode and the L-shaped design of the positive electrode solve the problems that no soldering tin is used, the negative electrode is connected with a switch in a lap joint mode, and the positive electrode is connected with a battery in a contact mode, so that the requirements of smart and exquisite portable electrical appliances, strong daily use property and excellent performance are met; meanwhile, the contact performance and the friction strength of the electric brush and the commutator are effectively improved, sparks generated when the commutator and the electric brush are rubbed are obviously reduced, noise is reduced, and the service life of the motor is prolonged; thereby achieving the special and simple contact requirement of the portable electric appliance and the requirement on the position of the electric brush after matching with the deflection angle of the commutator.
Drawings
Fig. 1 is a schematic structural diagram of a cover assembly of a permanent magnet dc motor according to the present invention;
fig. 2 is another angular structure diagram of the cover assembly of the permanent magnet dc motor according to the present invention;
fig. 3 is a cross-sectional view of the cover assembly of the permanent magnet dc motor of the present invention;
fig. 4 is a schematic structural view of an electrode slot of the cover assembly of the permanent magnet dc motor according to the present invention;
fig. 5 is a schematic structural diagram of a positive tab of the cover assembly of the permanent magnet dc motor according to the present invention;
fig. 6 is a schematic structural view of a negative electrode tab of the cover assembly of the permanent magnet dc motor according to the present invention;
fig. 7 is another angular structure diagram of the negative tab of the cover assembly of the permanent magnet dc motor according to the present invention;
fig. 8 is a schematic structural diagram of a brush of the cover assembly of the permanent magnet dc motor according to the present invention.
Detailed Description
The following describes embodiments of the present invention in detail with reference to the accompanying drawings.
Referring to fig. 1 to 8, the present invention provides a cover assembly for a permanent magnet dc motor, which includes a motor cover body 1, a positive electrode brush 21, a negative electrode brush 22, a positive electrode tab 3 and a negative electrode tab 4, wherein the motor cover body is integrally circular and is configured to be mounted to an end portion of a motor housing, an annular protrusion is disposed on an edge of an inner end surface (facing one end of the motor housing when being assembled) of the motor cover body 1 to form a mounting portion, the mounting portion is configured to be connected to the motor housing, the motor housing is made of metal and is electrically conductive, in order to improve assembly accuracy and efficiency, in this embodiment, a positioning protrusion 102 is disposed on the inner end surface of the motor cover body, and a plurality of grooves 101 are circumferentially uniformly disposed on an edge of an outer end surface of the motor cover body; a mounting area is formed in the annular mounting part, a concave hole is formed in the center of the bottom surface of the mounting area, a bearing sleeve 5 is embedded in the concave hole, and a guide hole is formed in the bearing sleeve and is coaxial with the cover body and used for accommodating a rotating shaft on the rotor to be sleeved in so as to fix the rotor; for convenient processing, the center hole is a stepped hole with a large inner end and a small outer end, and penetrates through two ends of the motor cover body, and a circular gasket 6 is arranged between the bearing sleeve and the stepped surface of the stepped hole, and is made of steel in the embodiment.
Specifically, referring to fig. 2, two electrode slots are symmetrically disposed on the side wall of the mounting region, each electrode slot is in a strip shape, and the opening direction of each electrode slot faces the mounting direction of the motor casing.
The structure of positive brush and negative brush is the same, refer to fig. 8, and it includes brush body 212, and the head of brush body is work portion 214, and work portion is a plurality of parallel arrangement's bar sheet structure for contact with the commutator, and the root of work portion is fixed with one and strengthens piece 213, and the afterbody of brush body is bent to one side and is greater than 90 degrees and forms joint portion 211, and this joint portion card is established in the electrode draw-in groove, and positive brush, negative brush are whole to be the L shape.
A positive electrode contact piece 3 and a negative electrode contact piece 4 are fixed on the motor cover body 1, the positive electrode contact piece 3 is connected with a positive electrode brush and used as positive electrode end input, and the negative electrode contact piece is connected with a negative electrode brush and used as negative electrode end input; the head of the positive pole contact piece is in contact with and electrically connected with the root of the positive pole electric brush 21, the tail of the positive pole contact piece extends to the outer end face of the motor cover body and serves as a positive pole access end connected with the positive pole of the battery, the head of the negative pole contact piece 4 is in contact with and electrically connected with the root of the negative pole electric brush 22, and the tail of the negative pole contact piece extends out of the side wall of the motor cover body and serves as a negative pole access end in contact with the motor shell.
Specifically, the outer side walls of the two electrode clamping grooves are provided with the splicing slots 100, for convenience of description, the positive splicing corresponds to the first splicing slot, and the negative splicing corresponds to the second splicing slot; referring to fig. 5, the positive electrode tab 3 includes a third tab 33 contacting with the root (the clamping portion) of the positive electrode brush, the third tab penetrates through the motor cover body and extends to the other end (the outer end) of the motor cover body, the end of the third tab is radially bent inward by 90 degrees and forms a second connecting portion 32, the end of the second connecting portion is provided with a fourth tab 31 coaxial with the motor cover body and used for contacting with the positive electrode of the battery, in this embodiment, the fourth tab is circular or annular, and the positive electrode tab is L-shaped as a whole; in order to improve the reliability and strength of direct contact with the battery anode, a cylindrical boss 11 is arranged at the center of the outer end face of the motor cover body, in the embodiment, the cylindrical boss is cylindrical, a concave hole for accommodating the tail part of the anode connecting piece to be sleeved is formed in the end face of the cylindrical boss, specifically, a circular hole is formed, a certain gap is formed between a fourth connecting piece and the bottom surface of the concave hole, the anode of the battery is in contact with the fourth connecting piece, and meanwhile, the anode of the battery is pushed to be pressed downwards until the anode of the battery is in contact with the bottom surface of the concave hole, so; in order to improve the connection reliability between the positive electrode contact piece and the positive electrode brush, a bulge 331 is arranged on any side or two sides of the positive electrode contact piece (third contact piece), so that the contact force with the root of the positive electrode brush can be improved, the virtual connection is avoided, and the contact connection reliability is improved; referring to fig. 6 and 7, the negative contact piece 4 includes a first contact piece 41 inserted into the second contact piece slot, an end of the first contact piece extends to an end of the annular protrusion and is bent outward to form a first connection portion, an end of the first connection portion is bent toward an outer wall of the annular protrusion and forms a second contact piece 43 for contacting with an inner wall of the motor housing to realize electrical connection, the negative contact piece is U-shaped as a whole, the second contact piece contacts with the inner wall of the housing to realize electrical connection, and the inner wall of the second motor housing is an arc surface, so as to improve contact area and reliability, the second contact piece is of a strip-shaped sheet structure and is two or more than two pieces, and the end of the second contact piece is bent outward to form a contact portion 431, thereby further improving; in order to improve the connection reliability between the negative pole contact piece and the negative pole electric brush, the side wall of the negative pole contact piece (the second contact piece) is provided with a bulge, so that the contact force with the root part of the negative pole electric brush can be improved, the virtual connection is avoided, and the contact connection reliability is improved.
Meanwhile, the invention also provides a motor which uses the permanent magnet direct current motor cover body assembly, when in use, the motor is coaxially arranged with a battery compartment behind the motor, a battery is arranged in the battery compartment, the positive pole of the battery is directly contacted with the positive pole connecting piece, specifically, the fourth connecting piece 31, and the negative pole is connected with the motor shell through a switch.
According to the permanent magnet direct current motor cover body assembly, the brush and the splicing structure are optimally designed again, and the contact type electric connection is adopted to replace the traditional welding type electric connection, so that the reliability and the stability of the electric connection are improved, the assembly and production cost is reduced, and the production efficiency is improved; the negative pole is in contact connection with the motor shell through the connecting piece, so that the electric connection reliability is improved, the connection is convenient and fast, and the assembly is simple; the positive electrode is led to the outer side of the cover body through the contact piece to be used as a contact piece directly connected with the positive electrode of the battery, the structure is compact, and the connection effect is good; meanwhile, the motor adopting the cover body assembly has reliable and stable contact between the electric brush and the commutator, thereby meeting the special and simplified contact requirement and brush insertion requirement of the portable electric appliance; the U-shaped design of the negative electrode and the L-shaped design of the positive electrode solve the problems that no soldering tin is used, the negative electrode is connected with a switch in a lap joint mode, and the positive electrode is connected with a battery in a contact mode, so that the requirements of smart and exquisite portable electrical appliances, strong daily use property and excellent performance are met; meanwhile, the contact performance and the friction strength of the electric brush and the commutator are effectively improved, sparks generated when the commutator and the electric brush are rubbed are obviously reduced, noise is reduced, and the service life of the motor is prolonged; thereby achieving the special and simple contact requirement of the portable electric appliance and the requirement on the position of the electric brush after matching with the deflection angle of the commutator.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the technical principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (9)
1. The utility model provides a permanent magnet direct current motor lid subassembly which characterized in that: the motor cover comprises a motor cover body, and a positive electrode connecting piece and a negative electrode connecting piece which are fixed on the motor cover body, wherein the head part of the positive electrode connecting piece is in contact with and realizes electric connection with the root part of a positive electrode electric brush fixed on the motor cover body, the tail part of the positive electrode connecting piece extends to the outer end face of the motor cover body and serves as a positive electrode access end connected with the positive electrode of a battery, the head part of the negative electrode connecting piece is in contact with and realizes electric connection with the root part of a negative electrode electric brush fixed on the motor cover body, and the tail part of the negative electrode connecting piece extends to the outer side wall of the motor cover body and serves as a negative electrode access end in.
2. The cover assembly for a permanent magnet dc motor according to claim 1, wherein: the positive brush and/or the negative brush are L-shaped.
3. The cover assembly for a permanent magnet dc motor according to claim 1, wherein: the border of motor lid body is equipped with the annular bulge and forms the installation department that is used for being connected with the motor casing, form the installing zone in the installation department, the lateral wall of installing zone is equipped with the appearance the positive pole brush or the electrode draw-in groove that the root card of negative pole brush goes into.
4. The cover assembly for a permanent magnet dc motor according to claim 3, wherein: and the side wall of the electrode clamping groove is provided with a splicing slot for inserting the connecting end of the positive splicing piece or the negative splicing piece.
5. The cover assembly for a permanent magnet dc motor according to claim 4, wherein: the negative pole connecting piece comprises a first connecting piece inserted into the connecting piece inserting groove, the end part of the first connecting piece extends to the end part of the annular bulge and is bent outwards to form a first connecting part, and the end part of the first connecting part is bent towards the direction of the outer wall of the annular bulge and forms a second connecting piece used for being in contact with the inner wall of the motor shell to achieve electric connection.
6. The cover assembly for a permanent magnet dc motor according to claim 1, wherein: the positive pole contact piece comprises a third contact piece in contact with the root of the positive pole electric brush, the third contact piece penetrates through the motor cover body and extends to the other end of the motor cover body, the end part of the third contact piece is bent inwards in the radial direction to form a second connecting part, and a fourth contact piece which is coaxial with the motor cover body and is used for being in contact with the positive pole of the battery is arranged at the end part of the second connecting part.
7. The cover assembly for a permanent magnet dc motor according to claim 1, wherein: the outer end face center of the motor cover body is provided with a cylindrical boss, and the end face of the cylindrical boss is provided with a concave hole in which the tail of the positive electrode connecting piece is sleeved.
8. The cover assembly for a permanent magnet dc motor according to claim 7, wherein: and a gap is formed between the tail part of the positive electrode connecting piece and the bottom surface of the concave hole.
9. An electric machine characterized by: use of a cover assembly for a permanent magnet dc motor according to any of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022320847.1U CN212909169U (en) | 2020-10-18 | 2020-10-18 | Permanent magnet direct current motor cover body assembly and motor with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022320847.1U CN212909169U (en) | 2020-10-18 | 2020-10-18 | Permanent magnet direct current motor cover body assembly and motor with same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212909169U true CN212909169U (en) | 2021-04-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022320847.1U Expired - Fee Related CN212909169U (en) | 2020-10-18 | 2020-10-18 | Permanent magnet direct current motor cover body assembly and motor with same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212909169U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114744457A (en) * | 2022-05-13 | 2022-07-12 | 广州大学 | Brush device of miniature direct current motor and forming method of brush piece |
-
2020
- 2020-10-18 CN CN202022320847.1U patent/CN212909169U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114744457A (en) * | 2022-05-13 | 2022-07-12 | 广州大学 | Brush device of miniature direct current motor and forming method of brush piece |
| CN114744457B (en) * | 2022-05-13 | 2024-03-01 | 广州大学 | Electric brush device of miniature direct current motor and forming method of electric brush sheet |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210406 Termination date: 20211018 |
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| CF01 | Termination of patent right due to non-payment of annual fee |