CN117477869B - DC torque motor commutator and brush assembly - Google Patents
DC torque motor commutator and brush assembly Download PDFInfo
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- CN117477869B CN117477869B CN202311811152.5A CN202311811152A CN117477869B CN 117477869 B CN117477869 B CN 117477869B CN 202311811152 A CN202311811152 A CN 202311811152A CN 117477869 B CN117477869 B CN 117477869B
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- 239000003292 glue Substances 0.000 claims abstract description 58
- 238000003466 welding Methods 0.000 claims abstract description 54
- 238000003860 storage Methods 0.000 claims abstract description 48
- 238000004804 winding Methods 0.000 claims abstract description 44
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 28
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 28
- 238000012545 processing Methods 0.000 claims abstract description 25
- 239000004593 Epoxy Substances 0.000 claims abstract description 16
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000004744 fabric Substances 0.000 claims abstract description 16
- 239000011521 glass Substances 0.000 claims abstract description 16
- 229910052709 silver Inorganic materials 0.000 claims abstract description 12
- 239000004332 silver Substances 0.000 claims abstract description 12
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000000084 colloidal system Substances 0.000 claims abstract description 8
- 238000005452 bending Methods 0.000 claims description 13
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 2
- 229910001220 stainless steel Inorganic materials 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 description 12
- 239000000956 alloy Substances 0.000 description 11
- 229910045601 alloy Inorganic materials 0.000 description 11
- 238000000034 method Methods 0.000 description 9
- 239000010445 mica Substances 0.000 description 8
- 229910052618 mica group Inorganic materials 0.000 description 8
- 230000004323 axial length Effects 0.000 description 7
- 238000013461 design Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000005538 encapsulation Methods 0.000 description 2
- 238000003475 lamination Methods 0.000 description 2
- 238000004382 potting Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
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- 238000000926 separation method Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K13/00—Structural associations of current collectors with motors or generators, e.g. brush mounting plates or connections to windings; Disposition of current collectors in motors or generators; Arrangements for improving commutation
- H02K13/006—Structural associations of commutators
-
- 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
-
- 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
- H01R39/38—Brush holders
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K13/00—Structural associations of current collectors with motors or generators, e.g. brush mounting plates or connections to windings; Disposition of current collectors in motors or generators; Arrangements for improving commutation
- H02K13/04—Connections between commutator segments and windings
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K13/00—Structural associations of current collectors with motors or generators, e.g. brush mounting plates or connections to windings; Disposition of current collectors in motors or generators; Arrangements for improving commutation
- H02K13/10—Arrangements of brushes or commutators specially adapted for improving commutation
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/46—Fastening of windings on the stator or rotor structure
- H02K3/50—Fastening of winding heads, equalising connectors, or connections thereto
-
- 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
- H02K5/14—Means for supporting or protecting brushes or brush holders
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R2201/00—Connectors or connections adapted for particular applications
- H01R2201/10—Connectors or connections adapted for particular applications for dynamoelectric machines
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
- H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
Abstract
The invention relates to a direct current torque motor commutator and a brush assembly, wherein an epoxy glass laminated cloth plate is wrapped at the end part of a rotor iron core, a reversing ring is arranged at the end part of a winding coil, the reversing ring is provided with an inner ring and an outer ring, the inner ring is a reserved layer, the outer ring is a processing grinding layer, a plurality of welding wire grooves and glue storage grooves are formed along the inner diameter of the reserved layer, the welding wire grooves and the glue storage grooves are arranged at intervals, silver wires are inserted into the welding wire grooves, and the silver wires are mutually wound and connected with outgoing wires of the winding coil; one side of the reversing ring is provided with a circular brush frame matched with the reversing ring, two groups of carbon brushes are symmetrically welded at the inner side wall of the brush frame through spring shifting sheets, and the outer side wall of the brush frame is respectively provided with two groups of symmetrical brush frame grooves. In the implementation, the invention adopts the reversing ring structure to replace the original reversing structure, simplifies the structure, and omits the steps of placing an insulating layer between the original sheet-shaped structures and then solidifying by using filling materials. Not only can prevent the commutator from loosening, but also can play the role of an insulating layer after the colloid in the colloid storage groove is condensed, so that the axial size of the commutator is compact, the radial size is precise, the problem of limited axial size of the motor is solved, and the application range is wide.
Description
Technical Field
The invention relates to the technical field of direct current motors, in particular to a direct current torque motor commutator and a brush assembly, and especially relates to a commutator and a brush assembly capable of shortening the axial length of a motor.
Background
In the prior art, in the direct current torque motor, the commutator plays an inversion role, is one of key components of the direct current motor, and the current commutation of the direct current torque motor mostly adopts slot wedge type commutators, so that the service life is short and the utilization rate of the wire embedding slot is reduced. The manufacturing process of the bracket type commutator is complex, the commutator segments are required to be manually arranged on the bracket during processing, insulating sheets are required to be placed at intervals among the segments of the commutator segments, and finally, the insulating sheets are solidified by filling materials, so that the lamination among the commutator segments is not tight due to no pretightening force, the gaps between the segments and the bracket are too large, the dimension is easy to be out of tolerance, and the commutator segments and the bracket are displaced during severe conditions, so that the reliability of the motor is finally affected.
Along with the development of intelligent equipment and weapon equipment to miniaturization and light weight, the requirements for lightening and thinning of the direct current torque motor for driving are provided. The direct current torque motor applied to special occasions is limited in size, the height of the winding end is only allowed to be 3-3.5mm, the slot wedge type commutator cannot meet the product performance and structural requirements, and the process of the ferrule type commutator capable of meeting the requirements is complex and difficult to manufacture.
For example, in the prior art, the application number is CN201410417494.3, and the application number is "a direct current motor commutator manufacturing method and a direct current motor", which describes such technical characteristics as a direct current motor commutator, including a commutator segment, a mica sheet, at least two alloy rings, and a shaft sleeve, wherein the commutator segment is provided with fixing holes corresponding to the number of the alloy rings, the surface of the alloy rings is provided with an insulating layer, each alloy ring correspondingly passes through one fixing hole on the commutator segment, so that the commutator segment and the alloy rings are relatively fixed, the mica sheet is provided with clamping grooves corresponding to the number of the alloy rings, the mica sheet is arranged between two adjacent commutator segments, and each clamping groove of the mica sheet is clamped on the corresponding alloy ring. The alloy ring provided with the reversing sheet and the mica sheet is sleeved on the outer surface of the shaft sleeve, and insulating resin is filled in a gap between the alloy ring provided with the reversing sheet and the mica sheet and the shaft sleeve so as to fix the alloy ring provided with the reversing sheet and the mica sheet and the shaft sleeve relatively, and a key slot for fixing the alloy ring provided with the reversing sheet and the mica sheet relatively to a rotating shaft of the motor rotor is arranged on the inner surface of the shaft sleeve. The whole structure is complex, the manufacturing cost is high, the process is complex, the cost is high, meanwhile, the problem of poor precision exists, and the popularization and the utilization are not facilitated.
In the motor industry, spring devices or elastic copper sheets are widely adopted at present to apply acting force to the electric brushes, so that the electric brushes are tightly attached to the commutator of a motor rotor, and the spring devices are used for easily causing the phenomenon that two or more adjacent rings of springs are clamped with each other in the use process, so that the electric brushes cannot be in good contact with the commutator, and the motor is invalid.
Therefore, there is an urgent need in the market for a structure of a direct current motor commutator and brush assembly that is simple and lightweight, has a simple processing technology, and is applicable to different sizes.
Disclosure of Invention
The invention aims to provide an improved direct current torque motor commutator and an improved brush assembly, and through structural improvement, the axial length of a motor is reduced, so that the motor structure is more compact, the light weight design is realized, meanwhile, insulating filling is not needed in the process, and the production cost is reduced.
In order to achieve the above object, the technical scheme of the present invention is as follows: the utility model provides a direct current torque motor commutator and brush subassembly, direct current torque motor includes the pivot, is equipped with rotor core and winding coil on the pivot, its characterized in that: an epoxy glass laminated cloth plate is wrapped at the end part of the rotor core, so that the rotor core is insulated and isolated from the winding coil; the end part of the winding coil is provided with a reversing ring, the reversing ring is provided with an inner ring and an outer ring, the inner ring is a reserved layer, the outer ring is a processing grinding layer, a plurality of welding grooves and glue storage grooves are formed along the inner diameter of the reserved layer, the welding grooves and the glue storage grooves are arranged at intervals, silver wires are inserted into the welding grooves, and the silver wires are mutually wound and connected with outgoing wires of the winding coil; one side of the reversing ring is provided with a circular brush frame matched with the reversing ring, two groups of carbon brushes are symmetrically welded at the inner side wall of the brush frame through spring shifting sheets, and the outer side wall of the brush frame is respectively provided with two groups of symmetrical brush frame grooves.
Preferably, the glue storage groove is internally provided with glue, the glue forms an insulating layer in the glue storage groove, insulating sheets are formed at the top and the bottom of the glue storage groove, and the insulating layer and the insulating sheets enable the rotor core, the winding coil and the reversing ring to form an integral structure.
Further, the spring plectrum is circular arc-shaped, and both ends are equipped with a carbon brush respectively, are equipped with two sets of bending lines on the spring plectrum, and the length of spring plectrum is 1/3-1/5 of brush holder inner circumference.
Further, a plurality of welding wire grooves and glue storage grooves are uniformly distributed along the inner diameter of the reversing ring, the welding wire grooves are arc grooves, the glue storage grooves are rectangular grooves, and the closed ends of the rectangular grooves are arc-shaped or isosceles triangle-shaped.
Further, the position of the brush holder groove is corresponding to that of the spring poking piece, and a power line connected with the spring poking piece and a first screw used for fixing the spring poking piece are arranged in the brush holder groove in a penetrating mode.
Furthermore, a group of screw grooves are formed in the brush frame, and the brush frame is fixedly connected with the reversing ring through second screws in the screw grooves.
Compared with the prior art, the technical scheme of the invention comprises a plurality of improvements in detail besides the improvement of the whole technical scheme, and particularly has the following beneficial effects:
1. in the improvement scheme of the invention, the end part of the winding coil is provided with the reversing ring, a plurality of welding wire grooves and glue storage grooves are formed along the inner diameter of the reversing ring retaining layer, the welding wire grooves and the glue storage grooves are mutually arranged at intervals, silver wires are inserted into the welding wire grooves, and the silver wires are mutually wound and connected with the outgoing wires of the winding coil, so that the axial dimension of the reverser is compact, the radial dimension is precise, the axial length of the motor is shortened, the commutator is suitable for motor mechanisms with different dimensions, good contact is realized, and the welding reliability is improved;
2. according to the technical scheme, one side of the reversing ring is provided with the annular brush frame matched with the reversing ring, two groups of carbon brushes are symmetrically welded at the inner side wall of the brush frame through the spring shifting piece, and two groups of symmetrical brush frame grooves are respectively formed in the outer side wall of the brush frame, so that the axial size of the motor is further reduced, meanwhile, the structure is simpler, the light design of the motor is realized, and the connection is firm and reliable;
3. in the structure of the invention, a plurality of welding grooves and glue storage grooves are uniformly distributed along the inner diameter of the reversing ring retaining layer, glue is poured into the glue storage grooves, the glue forms an insulating layer in the glue storage grooves, insulating sheets are formed at the top and bottom of the glue storage grooves, the insulating layer and the insulating sheets enable the rotor iron core, the winding coil and the reversing ring to form an integral structure, the glue storage grooves remove the original outer ring through secondary processing of the outer diameter of the reversing ring after encapsulation, only the inner ring is retained to form a reversing sheet structure, and the glue is poured into the glue storage grooves to form a compact and effective insulating layer, so that insulation among reversing sheets can be realized, the traditional step of solidifying by filling materials is replaced, the insulating performance of a motor is enhanced, the reverser is prevented from loosening, and meanwhile, the secondary processing after encapsulation ensures the rotor size to be accurate and the integrity to be stronger;
4. in the technical scheme of the invention, the spring plectrum is further described as an arc shape, two ends of the spring plectrum are respectively provided with a carbon brush, and two groups of bending lines are arranged on the spring plectrum, wherein the design of the spring plectrum reduces the brush holder structure of the traditional electric brush, thereby realizing the lightweight design of the motor, reducing the axial length of the motor and realizing the maximum utilization of space;
5. the direct-current torque motor commutator has compact structure and reasonable layout, is suitable for motors with different sizes, thoroughly improves the commutator structure, does not need insulating filling, improves the overall performance of the motor, reduces the production cost and improves the production efficiency.
Drawings
Fig. 1 is a schematic structural view of a reversing ring according to the present invention.
Fig. 2 is a schematic diagram of an assembly structure of a rotor core and a commutation ring according to the present invention.
Fig. 3 is a schematic structural view of the brush holder of the present invention.
Fig. 4 is a schematic structural view of a carbon brush and a spring pulling piece according to the present invention.
Fig. 5 is a schematic diagram showing an assembly structure of the brush holder, the spring plectrum and the carbon brush according to the present invention.
Fig. 6 is an enlarged partial schematic view of the brush holder and spring paddle assembly of the present invention.
Fig. 7 is a schematic structural diagram of an embodiment of the present invention.
Reference numerals:
the motor comprises a reversing ring 1, a brush frame 2, a rotor core 3, a winding coil 4 and an epoxy glass laminated cloth plate 5;
11 welding line grooves, 12 glue storage grooves, 13 reversing sheets, 14 retaining layers and 15 processing grinding layers;
21 carbon brushes, 22 spring shifting sheets, 23 brush holder grooves, 24 screw grooves, 25 arc grooves and 26 second screws;
221 bend line; 222 a first screw;
2211 elastic sheet.
Detailed Description
The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention provides a DC torque motor commutator and brush assembly, the DC torque motor includes the spindle, there are rotor core 3 and winding coil 4 on the spindle, see figure 1, figure 2 specifically, it is different from prior art that it lies in: the end part of the winding coil is provided with a reversing ring 1, the reversing ring is provided with an inner ring and an outer ring, the inner ring is a reserved layer 14, the outer ring is a processing grinding layer 15, a plurality of welding wire grooves 11 and glue storage grooves 12 are formed along the inner diameter of the reserved layer 14, the welding wire grooves and the glue storage grooves are mutually arranged at intervals, silver wires are inserted into the welding wire grooves, the silver wires and outgoing wires of the winding coil are mutually wound and connected, and finally the welding wires are welded and fixed; the two ends of the rotor core are respectively covered with an epoxy glass laminated cloth plate 5, the structure of the epoxy glass laminated cloth plates 5 corresponds to that of the rotor core 3, and clearance fit is formed between the epoxy glass laminated cloth plates 5 and the rotor core 3, and the thickness of the epoxy glass laminated cloth plates 5 is 0.5-1mm, so that the rotor core and a winding coil are insulated and isolated, and meanwhile, a commutation ring is prevented from being in contact with the rotor core to generate short circuit; one side of the reversing ring is provided with a circular brush frame 2 matched with the reversing ring, two groups of carbon brushes 21 are symmetrically welded at the inner side wall of the brush frame through spring pulling sheets 22, and the outer side wall of the brush frame is respectively provided with two groups of symmetrical brush frame grooves 23.
In practice, the invention adopts the reversing ring structure to replace the original reversing structure, and as a series of welding wire grooves 11 and glue storage grooves 12 are distributed along the inner diameter of the reversing ring retaining layer 14, the original structure of the reversing is simplified, the step of placing an insulating layer between the original sheet-shaped structures and then solidifying by using filling materials is omitted. After glue is filled into a plurality of glue storage grooves, the reversing ring (shown in fig. 1) can be subjected to secondary processing according to the outer diameter size of a rotor, and a processing grinding layer 15 is ground and removed according to requirements after the secondary processing, so that a reserved layer of an original inner ring is changed into a reversing piece 13 which is tightly attached to a block, an insulating layer (the structure after processing is shown in fig. 2) is arranged between adjacent line changing pieces, the reversing ring can not only prevent the reversing from loosening, but also play the role of the insulating layer after the glue in the glue storage grooves 12 is condensed, so that the reversing ring is compact in axial size and precise in radial size, and meanwhile, the problem that the axial size of a motor is limited is solved, and the reversing ring structure can be suitable for direct current torque motors with different sizes.
Example 1: in this embodiment, the end of winding coil is equipped with commutating ring 1, commutating ring is equipped with inner circle and outer lane, the inner circle is reserved layer 14, the outer lane is processing grinding layer 15, a plurality of welding line grooves 11 and glue storage groove 12 have been seted up along the internal diameter of reserved layer 14, welding line grooves and glue storage groove interval setting each other, the welding line inslot is equipped with the silver wire, the silver wire twines and connects with the lead-out wire of winding coil 4 each other, this kind of welding mode is firm reliable, can realize good contact, and guarantee that the lead-out wire of winding coil can firmly set up in the welding line groove 11 of commutating ring in the operation process of motor. Specifically, the ratio of the widths of the inner ring to the outer ring is 2.5-4:1, and the preferable scheme in the embodiment is 3.8:1.
Compared with the prior art, the direct current brush motor is generally a small-size motor, the structure is required to be compact, so that the distance between two welding spots of the commutator is relatively short, the welding spots are easy to adhere to cause short circuit during welding, and the phenomenon of false welding or false welding is easy to occur due to limited operation space during welding, and a winding outgoing line of the false welding can fall off from a wire embedding groove of the commutator in the operation process of the motor.
Therefore, the invention adopts the reversing ring to replace the improvement of the sheet-shaped reverser in the prior art, and has very outstanding technical effects from the aspects of size, structural layout and process.
Meanwhile, the end part of the rotor core is wrapped with the epoxy glass laminated cloth plate 5, so that the rotor core and the winding coil are insulated and isolated, the reversing ring is axially pressed on the epoxy glass laminated cloth plate of the rotor core by using the encapsulating tool, and through the arrangement of the epoxy glass laminated cloth plate, the winding coil and the rotor core can be effectively insulated and isolated, and the reversing ring and the rotor core can be prevented from being contacted to generate a short circuit event.
One side of the reversing ring is provided with a circular brush frame 2 matched with the reversing ring, two groups of carbon brushes 21 are symmetrically welded at the inner side wall of the brush frame through spring pulling sheets 22, and the outer side wall of the brush frame is respectively provided with two groups of symmetrical brush frame grooves 23. Whereas the conventional brush of the prior art includes a carbon brush, a brush holder and an elastic means, the structure is complicated and the axial length is increased.
The invention adopts an annular brush holder structure matched with a reversing ring and is matched with a spring plectrum and a carbon brush, and a lightweight design is carried out, specifically, the spring plectrum 22 is arc-shaped, two ends of the spring plectrum are respectively provided with a carbon brush 21, two groups of bending lines 221 are arranged on the spring plectrum, and the length of the spring plectrum is 1/3-1/5 of the inner circumference of the brush holder. Simultaneously, through spring plectrum with carbon brush and brush holder fixed knot structure, in subsequent use, it is more convenient to dismantle, easily installs and subsequent maintenance work, and the axial length of motor can further be reduced to brush holder structure here after the installation, and compact structure simultaneously, degree of integration is high, avoids the brush holder in use to produce axial and rocks.
In summary, the beneficial effects achieved by the invention are as follows:
the structure of the reversing ring and the carbon brush assembly can simplify the manufacturing process of the reverser, reduce the axial length of the motor, reduce the welding risk of the motor, realize light design on the motor, improve the motor efficiency, and simultaneously, the reversing ring and the carbon brush assembly can be suitable for motor structures with different sizes, and have strong universality and wide application range;
the reversing ring is a structure capable of performing secondary processing, the structure is precisely processed through the processing grinding layer of the grinding reversing ring, the processing grinding layer is removed, the reserved layer is changed into a piece of adjacent reversing pieces, two ends of colloid arranged in the colloid storage groove are exposed, an effective insulating layer structure is formed between the adjacent reversing pieces, the manufacturing steps of the reverser can be simplified, and the production cost is reduced;
the brush assembly structure reduces the brush holder and the elastic device structure, is placed on the inner diameter of the brush, reduces the axial size of the motor, and ensures that the motor structure is more compact.
Example 2: in the embodiment, the direct current torque motor comprises a rotating shaft, a rotor iron core 3 and a winding coil 4 are arranged on the rotating shaft, and an epoxy glass laminated cloth plate 5 is wrapped at the end part of the rotor iron core 3, so that the rotor iron core 3 is insulated and isolated from the winding coil 4; the end part of the winding coil 4 is provided with a reversing ring 1, the reversing ring is provided with an inner ring and an outer ring, the inner ring is a reserved layer 14, the outer ring is a processing grinding layer 15, a plurality of welding wire grooves 11 and glue storage grooves 12 are formed along the inner diameter of the reserved layer 14, the welding wire grooves 11 and the glue storage grooves 12 are mutually arranged at intervals, silver wires are inserted into the welding wire grooves 11, the silver wires are mutually wound and connected with outgoing wires of the winding coil 4, and the conducting part of the reversing ring 1 is connected with the winding coil 4 in the shortest distance by the connecting mode, so that the copper consumption can be greatly reduced, and the motor loss is reduced; one side of the reversing ring 1 is provided with a circular brush frame 2 matched with the reversing ring, two groups of carbon brushes 21 are symmetrically welded at the inner side wall of the brush frame through spring pulling sheets 22, and the outer side wall of the brush frame is respectively provided with two groups of symmetrical brush frame grooves 23.
Specifically, a plurality of welding wire grooves 11 and glue storage grooves 12 are uniformly distributed along the inner diameter of the retaining layer 14, wherein 1-3 welding wire grooves 11 can be arranged as a group, 1 glue storage groove 12 is arranged between adjacent welding wire groove groups, the arrangement of the welding wire grooves 11 can be selected and designed according to the wire diameter and the parallel winding number of a motor, when the reversing ring is subjected to secondary processing after glue filling (inner ring retaining, outer ring grinding and removing, specifically, after rotor iron cores, windings, rotating shafts, reversing rings and welding spots are integrally positioned and encapsulated on the outer ring of the reversing ring, the end face of the reversing ring is pressed by a tool, turning secondary processing is performed to the technical requirement size by using the feeding amount of 0.1 mm), the retaining layer 14 forms a plurality of adjacent reversing pieces 13, each reversing piece 13 is provided with one group of welding wire grooves, and the glue storage groove 12 between each group of welding wire grooves is changed into an insulating layer. The reversing ring 1 in the implementation is simple in structure and easy to process, reduces the production cost and improves the production efficiency.
Meanwhile, the welding wire groove 11 can adopt an arc groove or a wedge groove, wherein the arc groove is a semicircular groove, a 3/4 circular groove or a 4/5 circular groove, the 4/5 circular groove (namely, a 1/5 arc is a notch position, and the 4/5 arc is a groove body part) has better effect, the notch is small, and the inner space is large, so that the inserted silver wire and the winding lead wire are not easy to deviate after being wound, meanwhile, a space is provided for a welding position, the welding effectiveness is ensured, and the wedge groove has the same technical effect and is not repeated herein.
Further, the glue storage groove 12 is a rectangular groove, the closed end of the rectangular groove is in an arc shape or an isosceles triangle shape, and 3/4 of the closed end of the rectangular groove is removed when the secondary processing is performed in the embodiment, so that the glue storage groove has a structure with one end narrowed, and the insulation layer formed by the glue is not easy to separate in the subsequent working process. The width of the glue storage groove is 0.5mm, and the length of the radial direction is larger than the outer diameter of the rotor core, so that the separation of the reversing pieces after secondary processing is facilitated. Glue is poured into the glue storage groove, an insulating layer is formed in the glue storage groove by the glue, insulating sheets are formed at the top and the bottom of the glue storage groove, and the insulating layer and the insulating sheets enable the rotor core 3, the winding coil 4 and the reversing ring 1 to form an integral structure, so that the insulating performance of the motor is greatly enhanced. Here, in order to ensure the effective formation of the insulating sheet, a plurality of triangular notches can be formed around the rectangular groove, so that the colloid flows out of the notches easily, an upper insulating sheet and a lower insulating sheet with uniform thickness are formed after solidification, meanwhile, the laying area of the insulating sheet is larger, the purpose of good insulation is achieved, the trouble of post-processing is further avoided, and meanwhile, the using amount of the colloid is also saved.
Example 3: in the embodiment, the reversing ring 1 is sleeved on the outer circumference of the end part of the winding coil 4, so that the circumference Xiang Banjing of the reversing ring 1 is increased, the contact area between the reversing ring 1 and the carbon brush 21 is increased, and the rotor current is improved. Because the end part of the rotor core 3 is wrapped with the epoxy glass laminated cloth plate 5, the rotor core 3 is insulated and isolated from the winding coil 4, and the commutation ring 1 can be prevented from being in contact with the rotor core 3 to generate short circuit.
Specifically, the reversing ring 1 is axially pressed on an epoxy glass lamination cloth plate 5 of the rotor core by using a potting tool, and the radial outer diameter is kept concentric with the rotor core by using the potting tool; the inner diameter of the reversing ring is larger than the outer diameter of the end part of the winding coil, and the outer diameter of the reversing ring is 2mm larger than the outer diameter of the rotor core 3, so that secondary processing is facilitated. The reversing ring 1, the rotor core 3, the winding coil 4, the rotating shaft and the welding spots are subjected to secondary processing after being integrally encapsulated and solidified by an encapsulating tool, so that the axial size of the reverser is compact, and the radial size is precise.
One side of the reversing ring 1 is provided with a circular brush frame 2 matched with the reversing ring, two groups of carbon brushes 21 are symmetrically welded at the inner side wall of the brush frame through spring pulling sheets 22, the outer side wall of the brush frame is respectively provided with two groups of symmetrical brush frame grooves 23, the central angle range corresponding to the circular arc between the two groups of brush frame grooves 23 is 60-100 degrees, namely, the central angle range between the two groups of brush frame grooves is 60-100 degrees. The positions of the brush frame grooves 23 are correspondingly arranged with the positions of the spring poking sheets 22, and each group of brush frame grooves 23 is provided with two brush frame grooves 23, wherein one brush frame groove 23 is internally provided with a power line connected with the spring poking sheets 22 in a penetrating way, and the other brush frame groove 23 is internally provided with a first screw 222 used for fixing the spring poking sheets 22, and the shape of the brush frame groove 23 can be a dovetail groove, a trapezoid groove or an arc groove. The brush holder 2 is provided with a group of symmetrically arranged screw grooves 24, and the brush holder 2 is fixedly connected with the reversing ring 1 through second screws 26 arranged in the screw grooves.
The brush holder 2 is provided with two arc grooves 25 for placing the spring pulling piece 22, two groups of bending lines 221 of the spring pulling piece 22 are symmetrically arranged along the spring pulling piece 22 and are close to the carbon brushes 21 at two ends, and the distance from the bending lines 221 to the carbon brushes 21 is 1/6-1/4 of the length of the spring pulling piece 22. The spring poking piece 22 is a stainless steel spring poking piece with the thickness of 0.8-1.2mm and the elastic force of the two ends of 0.2-0.4N so as to ensure that the brush holder is fully contacted with the reversing piece after welding. The spring pulling piece 22 ensures that the carbon brush 21 is effectively contacted with the reversing ring 1 by arranging the bending lines 221, specifically, each group of bending lines comprises an elastic sheet 2211, two ends of the elastic sheet 2211 are respectively connected with the spring pulling piece 22 through arc grooves, and the thickness of the elastic sheet 2211 is 2/3-1/2 of the thickness of the spring pulling piece 22. The bending line 221 changes the bending angle at the two ends of the spring poking piece 22, and meanwhile, the bending angle is equal to the original elastic angle range of the spring poking piece, and a local elastic space is enhanced, so that the rigidity of the local elastic space is more sufficient, the reaction is more sensitive, the contact area and the contact time between the carbon brush 21 and the rotating reversing ring 1 can be increased, and the rotor current can be improved.
Specifically, the simplified implementation steps of the invention are as follows:
1) Installing a reversing ring at the end part of the rotor core;
2) Welding the outgoing line of the winding coil with the silver wire in the welding wire groove to realize the conduction between the winding coil and the reversing ring;
3) The pouring sealant is solidified together with the rotor iron core, the rotating shaft, the winding coil, the reversing ring and the welding spots;
4) The outer diameter of the reversing ring is processed for the second time, so that the outer ring is processed and removed while the structural size meets the design requirement, the inner ring is reserved to form a plurality of reversing pieces, and the adjacent reversing pieces are effectively separated and insulated through an insulating layer;
5) Mounting a carbon brush and a spring shifting piece on a brush frame;
6) The brush structure is fixed by using screws.
Further details of the invention are not to be taken as limiting the practice of the invention to the above description. It will be apparent to those skilled in the art that several simple deductions or substitutions may be made without departing from the spirit of the invention, and these should be considered to be within the scope of the invention.
Claims (10)
1. The utility model provides a direct current torque motor commutator and brush subassembly, direct current torque motor includes the pivot, is equipped with rotor core (3) and winding coil (4) in the pivot, its characterized in that: an epoxy glass laminated cloth plate (5) is wrapped at the end part of the rotor core (3), so that the rotor core (3) is insulated and isolated from the winding coil (4);
the end part of the winding coil (4) is provided with a reversing ring (1), the reversing ring is provided with an inner ring and an outer ring, the inner ring is a reserved layer (14), the outer ring is a processing grinding layer (15), a plurality of welding wire grooves (11) and glue storage grooves (12) are formed along the inner diameter of the reserved layer (14), the welding wire grooves (11) and the glue storage grooves (12) are arranged at intervals, silver wires are inserted into the welding wire grooves, and the silver wires are mutually wound and connected with outgoing wires of the winding coil;
one side of the reversing ring (1) is provided with a circular brush holder (2) matched with the reversing ring, two groups of carbon brushes (21) are symmetrically welded at the inner side wall of the brush holder through spring poking pieces (22), and the outer side wall of the brush holder is respectively provided with two groups of symmetrical brush holder grooves (23);
the glue storage groove 12 is a rectangular groove, the closed end of the rectangular groove is in an arc shape or an isosceles triangle shape, glue is arranged in the glue storage groove (12), an insulating layer is formed in the glue storage groove by the glue, insulating sheets are formed at the top and the bottom of the glue storage groove, and the rotor iron core (3), the winding coil (4) and the reversing ring (1) form an integral structure by the insulating layer and the insulating sheets;
after the processing grinding layer of the outer ring is removed, the retaining layer forms a reversing sheet closely attached to the reversing sheet, the closed end of the rectangular groove is removed by 3/4, the glue storage groove is formed into a structure with one end narrowed,
two ends of the colloid in the colloid storage groove are exposed, and an insulating layer is formed between the adjacent reversing sheets.
2. The direct current torque motor commutator and brush assembly of claim 1, wherein: the spring plectrum (22) is arc-shaped, two ends are respectively provided with a carbon brush (21), two groups of bending lines (221) are arranged on the spring plectrum, and the length of the spring plectrum is 1/3-1/5 of the inner circumference of the brush holder.
3. The direct current torque motor commutator and brush assembly of claim 1, wherein: a plurality of bonding wire grooves (11) and glue storage grooves (12) are uniformly distributed along the inner diameter of the retaining layer (14), 1-3 bonding wire grooves (11) are formed into a group, and 1 glue storage groove (12) is arranged between adjacent bonding wire groove groups; the ratio of the width of the retaining layer to the width of the working grinding layer is 2.5-4:1.
4. A dc torque motor commutator and brush assembly as defined in claim 3, in which: the welding line groove (11) is an arc groove or a wedge groove.
5. The direct current torque motor commutator and brush assembly of claim 1, wherein: the position of the brush frame groove (23) is corresponding to the position of the spring poking piece (22), and a power line connected with the spring poking piece (22) and a first screw (222) used for fixing the spring poking piece are arranged in the brush frame groove (23) in a penetrating way;
the brush frame groove is in a dovetail groove, a trapezoid groove or an arc groove.
6. The direct current torque motor commutator and brush assembly of claim 1, wherein: the brush holder is provided with a group of screw grooves (24), and the brush holder (2) is fixedly connected with the reversing ring (1) through second screws (26) arranged in the screw grooves.
7. The direct current torque motor commutator and brush assembly of claim 2, wherein: the inner side wall of the brush frame (2) is provided with two arc grooves (25) for placing spring poking sheets (22); two groups of bending lines (221) of the spring poking piece (22) are symmetrically arranged along the spring poking piece (22) and are close to carbon brushes (21) at two ends; the distance from the bending line (221) to the carbon brush (21) is 1/6-1/4 of the length of the spring poking piece (22).
8. The direct current torque motor commutator and brush assembly of claim 2, wherein: the spring poking piece (22) adopts a stainless steel spring poking piece, the thickness is 0.8-1.2mm, and the elasticity at the two ends is 0.2-0.4N.
9. The direct current torque motor commutator and brush assembly of claim 1, wherein: the reversing ring (1) is sleeved on the outer circumference of the end part of the winding coil (4), and the outer diameter of the reversing ring is 2mm larger than that of the rotor core (3).
10. The direct current torque motor commutator and brush assembly of claim 1, wherein: and a clearance fit is formed between the epoxy glass laminated cloth plate (5) and the rotor core (3), and the thickness of the epoxy glass laminated cloth plate (5) is 0.5-1mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311811152.5A CN117477869B (en) | 2023-12-27 | 2023-12-27 | DC torque motor commutator and brush assembly |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311811152.5A CN117477869B (en) | 2023-12-27 | 2023-12-27 | DC torque motor commutator and brush assembly |
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| Publication Number | Publication Date |
|---|---|
| CN117477869A CN117477869A (en) | 2024-01-30 |
| CN117477869B true CN117477869B (en) | 2024-03-22 |
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| CN202311811152.5A Active CN117477869B (en) | 2023-12-27 | 2023-12-27 | DC torque motor commutator and brush assembly |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW200409437A (en) * | 2002-07-12 | 2004-06-01 | Black & Decker Inc | Dynamoelectric machine having a coil structure encapsulated with a thermally conductive plastic |
| CN204633510U (en) * | 2015-04-03 | 2015-09-09 | 博世汽车部件(长沙)有限公司 | For the sheet spring of brush, brush holder assembly and motor |
| CN213959918U (en) * | 2020-12-10 | 2021-08-13 | 陕西航天时代导航设备有限公司 | DC torque motor commutator segment and assembly fixture |
| CN114614315A (en) * | 2022-03-01 | 2022-06-10 | 李泽军 | Electric brush device of small motor |
-
2023
- 2023-12-27 CN CN202311811152.5A patent/CN117477869B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW200409437A (en) * | 2002-07-12 | 2004-06-01 | Black & Decker Inc | Dynamoelectric machine having a coil structure encapsulated with a thermally conductive plastic |
| CN204633510U (en) * | 2015-04-03 | 2015-09-09 | 博世汽车部件(长沙)有限公司 | For the sheet spring of brush, brush holder assembly and motor |
| CN213959918U (en) * | 2020-12-10 | 2021-08-13 | 陕西航天时代导航设备有限公司 | DC torque motor commutator segment and assembly fixture |
| CN114614315A (en) * | 2022-03-01 | 2022-06-10 | 李泽军 | Electric brush device of small motor |
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| Publication number | Publication date |
|---|---|
| CN117477869A (en) | 2024-01-30 |
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