CN201656635U - Ultraminiature DC motor with convenient mounting of electric brushes - Google Patents
Ultraminiature DC motor with convenient mounting of electric brushes Download PDFInfo
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- CN201656635U CN201656635U CN2010200566632U CN201020056663U CN201656635U CN 201656635 U CN201656635 U CN 201656635U CN 2010200566632 U CN2010200566632 U CN 2010200566632U CN 201020056663 U CN201020056663 U CN 201020056663U CN 201656635 U CN201656635 U CN 201656635U
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- seat board
- casing
- ultraminiature
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Abstract
The utility model relates to an ultraminiature DC motor with convenient mounting of electric brushes. The DC motor comprises a rotor, a stator and a brush assembly, wherein the brush assembly includes a seat board located at one end of a casing, as well as an upper electric brush and a lower electric brush mounted on the seat board and located inside the casing; two convex columns are convexly arranged on the end surface of the seat board close to the casing, and a column body is arranged on the outer side of each convex column and located at a certain distance from the corresponding convex column; each electric brush is provided with a straight part, a vertical part vertically extending out of one end of the straight part, and an inclined part extending out of the other end of the straight part in a bent and inclined manner, and the straight parts are located between the convex columns and the column bodies; and a clamping groove is formed on each column body, a positioning piece is arranged on the straight part of each electric brush in an outwardly protruding manner, both the straight part and the vertical part of each electric brush cling to the corresponding convex column, and each positioning piece is located in the corresponding clamping groove. The utility model adopting the structure has the advantage that the positioning pieces and the clamping grooves are matched with each other to effectively control the mounting positions of the electric brushes, so as to guarantee a uniform brush distance.
Description
Technical field
The utility model belongs to the electrical micro-machine technical field, relates in particular to a kind of Ultraminiature continuous current dynamo that brush is installed of being convenient to.
Background technology
At present, DC micromotor is widely used in mobile communication and model plane field, with respectively as the vibration source and the carry-on drive source of model plane of mobile communication facility.Along with mobile communication facility and model plane aircraft constantly to better function, volume is littler, direction thinner, that weight is lighter develops, motor also wants cube littler, more efficient.
As shown in Figure 1, existing micromachine generally includes rotor 1 ', stator 2 ' and brush group 3 '.Rotor 1 ' comprises rotor rack 11 ' and winding 12 ', and rotor rack 11 ' comprises rotating shaft 111 ', is sheathed on the retainer ring 112 ' of rotating shaft 111 ' one end and the commutator 113 ' that is positioned at rotating shaft 111 ' one end.Stator 2 ' comprises casing 21 ' and is positioned at the magnet steel combination 22 ' of casing 21 ', magnet steel combination 22 ' comprises the bearing 221 ' that is sheathed in the rotating shaft 111 ', be sheathed on the trombone slide 222 ' on the bearing 221 ' and be sheathed on magnet steel 223 ' on the trombone slide 222 ', wherein, the outside wall surface of trombone slide 222 ' one end contacts with the internal face of casing 21 ' one end.Brush group 3 ' comprises the seat board 31 ' that is positioned at casing 21 ' one end and is installed on seat board 31 ' and goes up and be positioned on two brush 32 ', two brushes 32 ' of casing 21 ' and be connected with a lead 4 ' respectively.
As shown in Figure 2, the brush 32 ' rake 323 ' that has straight plate part 321 ', the vertical component effect 322 ' that goes out by an end vertical extent of straight plate part 321 ' and go out by the other end bending diagonally extending of straight plate part 321 '.Seat board 31 ' convexes with two projections 317 ' near on the end face 314 ' of casing 21 ', each projection 317 ' has two right angle ribs, qualified motor requires the straight plate part 321 ' of brush 32 ' and the square position place of vertical component effect 322 ' handing-over to be close to the right angle rib that seat board 31 ' is gone up projection 317 ', be that straight plate part 321 ' is close to projection 317 ' (locating as II ' among Fig. 2) simultaneously with vertical component effect 322 ', the brush distance of generation is A.
Yet, because existing brush 32 ' does not have left and right sides position limiting structure, often the assembly crewman is pursuit speed or other artificial origins when assembling, cause the junction, right angle of brush 32 ' not to be close to the right angle rib (locating) of seat board 31 ' projection 317 ' as III ' among Fig. 3, the brush of the product of making like this is apart from being B, B＞A is substandard product.
In addition, above-mentioned motor also exists following weak point:
(1) as shown in Figures 2 and 3, seat board 31 ' is provided with centre bore 315 ' near the central authorities of the end face 314 ' of casing 21 ', and commutator 113 ' is installed in the centre bore 315 '.The external diameter of commutator 113 ' is greater than the brush distance between two brushes 32 ', when commutator 113 ' is installed, requires commutator 113 ' to press down the rake 323 ' of lower brush 32 ', slides in the centre bore 315 ' of seat board 31 '.In the process that commutator 113 ' is installed, appropriate distortion has taken place in the rake 323 ' of lower brush 32 ', need avoid power up brush 32 ' distortion, treat that commutator 113 ' is in place after, the rake 323 ' elastic recovery of lower brush 32 ' is to reset condition.Yet, in the practical operation, the yardstick that manual operation presses down lower brush 32 ' differs, and yardstick is little, and commutator 113 ' is suspended to the rake 323 ' of power up brush 32 ' easily, cause power up brush 32 ' distortion, yardstick is big, causes lower brush 32 ' excessive deformation (the correct initial installation site of commutator 113 ' has been shown among Fig. 2, and commutator 113 ' initial installation site shown in Fig. 3 to be too by down again easily, yardstick is bigger during installation, lower brush 32 ' easy excessive deformation).
(2) as shown in Figure 4, offer through hole 311 ' on seat board 31 ', motor lead 4 ' passes through hole 311 ', draws from through hole 311 '.Can be movable up and down after the lead 4 ' of existing motor is drawn from through hole 311 ', after motor is installed on the product, during work, because vibration, the through hole 311 ' of lead 4 ' root and seat board 31 ' end face is located (locating as I ' among Fig. 4) and is produced friction, and fatigue break easily takes place lead 4 ' root.
(3) in order to guarantee the contact area of trombone slide 222 ' and casing 21 ', and adhere to dynamics between trombone slide 222 ' and the casing 21 ', trombone slide 222 ' external diameter can not be done too for a short time, for the less motor of volume requirement (is the ultra-micromotor of 3.2mm as diameter), if adopt said structure, magnet steel 223 ' wall thickness is too thin, be difficult for processing, in addition, even adopt the neodymium-iron-boron magnetic material of high magnetic, table magnetic does not reach designing requirement yet, and the motor combination property is too poor.
(4) as shown in Figure 5, general three utmost points that adopt of existing motor commutate, and its commutator 113 ' has three commutator segments, because average voltage and commutator segment quantity between the commutator segment are inversely proportional to, therefore, potential difference is relatively large, spark is bigger, and this can influence the life-span of motor, and might produce electric noise.
(5) existing motor generally adopts manual soldering that brush 32 ' and lead 4 ' are welded together, yet, the not enough environmental protection of the raw material of soldering, and manual soldering is too much with the tin amount, and the pernicious gas of getting rid of in the operation is bigger, contaminated environment.On the other hand, because the brush 32 ' of micromachine is too little, solder side is very little, and the operation easier of manual scolding tin is big, and efficient is low.
The utility model content
Technical problem to be solved in the utility model is to overcome the deficiencies in the prior art, and a kind of Ultraminiature continuous current dynamo that brush is installed of being convenient to is provided, and the installation site of its may command brush guarantees that brush is apart from consistent.
The utility model is achieved in that provides a kind of Ultraminiature continuous current dynamo that brush is installed of being convenient to, and comprises rotor, stator and brush group.Rotor comprises rotor rack and winding; Rotor rack comprises rotating shaft, is sheathed on the retainer ring of rotating shaft one end and the commutator that is positioned at rotating shaft one end.Stator comprises casing and is positioned at the magnet steel combination of casing; Magnet steel combination comprises the bearing that is sheathed in the rotating shaft, be sheathed on the trombone slide in the rotating shaft and be sheathed on magnet steel on the trombone slide.The brush group comprises the seat board that is positioned at casing one end and is installed on the seat board and is positioned at the upper and lower brush of casing; Seat board is near convexing with two projections on the end face of casing, and the outside of each projection and projection across a certain distance position mutually are provided with cylinder; Brush is connected with a lead respectively, the rake that each brush has straight plate part, the vertical component effect that is gone out by an end vertical extent of straight plate part and gone out by the other end bending diagonally extending of straight plate part, and straight plate part is between projection and cylinder.Wherein, cylinder is provided with draw-in groove, outwards convexes with spacer on the straight plate part of brush, and the straight plate part of brush and vertical component effect all are close to projection, and spacer is positioned at draw-in groove.
As further improvement in the technical proposal, described seat board is provided with centre bore and commutator installation slide rail near the central authorities of the end face of casing, one end of slide rail is connected with centre bore, its lower limb and centre bore edge are tangent, and the spacing between its lower limb and the lower brush rake equals the deformation quantity that the lower brush rake allows.
As further improvement in the technical proposal, offer through hole on the described seat board, lead passes through hole, draws from the through hole; Seat board is provided with away from the end face of casing and is used to limit the lug that lead moves.
Further, described lug has two phases extension and two stop sections across a certain distance, and extension stretches out from the seat board end face, and the stop section is bent relatively to extend by two extensions and forms, and presses and put on lead.
Further, described lug has two a phases extension and stop section across a certain distance, and extension stretches out from the seat board end face, and the stop section connects two extensions, and presses and put on lead.
As further improvement in the technical proposal, the outside wall surface of described trombone slide one end contacts with the internal face of casing, and trombone slide is stepped, and it supplies the diameter of the diameter at the sheathed position of magnet steel less than the position that contacts with casing.
As further improvement in the technical proposal, described motor has two bearings, and trombone slide is between two bearings, and the bigger position of its diameter is set on one of them bearing, and magnet steel is sheathed on another bearing and the trombone slide simultaneously.
As further improvement in the technical proposal, described commutator is the commutations of five utmost points, and it has five commutator segments.
As further improvement in the technical proposal, described brush adopts spot welding to be connected with lead.
Compared with prior art, on the straight plate part of brush spacer is set, by cooperating of spacer and draw-in groove, effectively the installation site of control brush guarantees that brush is apart from consistent.
In addition, above-mentioned each improved technical scheme also has the following advantages respectively:
(1) on seat board, sets up commutator slide rail is installed, because the lower limb and the centre bore edge of slide rail are tangent, and the spacing between its lower limb and the lower brush rake equals the deformation quantity that the lower brush rake allows, like this, commutator can slide into seat board central authorities along the slide rail lower limb when mounted, can effectively avoid the brush distortion.
(2) on seat board, set up lug, like this, can directly bend after lead is drawn from seat board, and by the lug limiting displacement, in the time of can avoiding motor oscillating, the through hole of lead root and seat board end face rubs and ruptures to a direction.
(3) trombone slide is designed stepped, when guaranteeing trombone slide and casing contact area and adhering to dynamics, can increase the magnet steel wall thickness, thereby the table magnetic of raising magnet steel improves the combination property of motor.In addition, the trombone slide diameter is set on one of them bearing than large part, and another bearing and trombone slide are set up in parallel in rotating shaft, can make bearing outside diameter be unlikely to too little like this, is convenient to bearing processing.
(4) commutator adopts the commutation of five utmost points, and the spacing between the commutator segment is less, and spark is less, and motor commutation is steady, reliable, thereby guarantees that motor properties is better, operation is more steady.
(5) brush adopts spot welding to be connected with lead, both environmental protection, and production efficiency is also higher, and can control the size of bump.
Description of drawings
Fig. 1 be existing DC micromotor radially partly cut open schematic diagram.
Fig. 2 is the brush installation site and the initial installation site of the commutator schematic diagram of qualified DC micromotor.
Fig. 3 is the brush installation site and the initial installation site of the commutator schematic diagram of defective DC micromotor.
Fig. 4 is the structural representation that the seat board of existing DC micromotor cooperates with lead.
Fig. 5 is the end face structure schematic diagram of the rotor rack of existing DC micromotor.
Fig. 6 is the radial section schematic diagram that the utility model is convenient to the Ultraminiature continuous current dynamo of brush installation.
Fig. 7 is the structural representation that seat board cooperates with brush, commutator among Fig. 6.
Fig. 8 is the structural representation that seat board cooperates with brush among Fig. 7.
Fig. 9 is a commutator installation process schematic diagram among Fig. 7.
Figure 10 is the structural representation that seat board cooperates with lead among Fig. 6.
Figure 11 is the end face structure schematic diagram of Fig. 6 rotor frame.
Figure 12 is the schematic diagram that adopts spot welding frock assembly welding brush and lead.
Figure 13 is the enlarged diagram at C place among Figure 12.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer,, the utility model is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.
Seeing also Fig. 6, is the preferred embodiment that the utility model is convenient to the Ultraminiature continuous current dynamo of brush installation, and this motor comprises rotor 1, stator 2 and brush group 3.Rotor 1 comprises rotor rack 11 and winding 12; The commutator 113 that rotor rack 11 comprises rotating shaft 111, is sheathed on the retainer ring 112 of rotating shaft 111 1 ends and is positioned at rotating shaft 111 1 ends.Stator 2 comprises casing 21 and is positioned at the magnet steel combination 22 of casing 21; Magnet steel combination 22 comprises the bearing 221 that is sheathed in the rotating shaft 111, be sheathed on the trombone slide 222 in the rotating shaft 111 and be sheathed on magnet steel 223 on the trombone slide 222.Brush group 3 comprises the seat board 31 that is positioned at casing 21 1 ends and is installed on the seat board 31 and is positioned on two brushes, 32, two brushes 32 of casing 21 and is connected with a lead 4 respectively.
As shown in Figures 7 and 8, seat board 31 is provided with centre bore 315 near the central authorities of the end face 314 of casing 21, convex with a projection 317 respectively in the both sides of centre bore 315, the outside of each projection 317 and projection 317 across a certain distance position mutually are provided with cylinder 318, and cylinder 318 is provided with draw-in groove 3181.
Brush 32 has straight plate part 321, vertical component effect 322 and rake 323, and vertical component effect 322 is gone out by an end vertical extent of straight plate part 321, and rake 323 is gone out by the other end bending diagonally extending of straight plate part 321.Outwards convex with spacer 3211 on the straight plate part 321 of brush 32, straight plate part 321 is between projection 317 and cylinder 318, and straight plate part 321 all is close to projection 317 with vertical component effect 322, and spacer 3211 is positioned at draw-in groove 3181.Like this, by cooperating of spacer 3211 and draw-in groove 3181, effectively the installation site of control brush 32 guarantees that brush is apart from consistent.
As shown in Figure 9, when commutator 113 was installed, commutator 113 slided into centre bore 315 central authorities along the lower limb of slide rail 316, in sliding process, commutator 113 presses down the rake 323 of lower brush 32, makes the rake 323 appropriateness distortion of lower brush 32, simultaneously, power up brush 32 distortion have been avoided.
Because the spacing between the rake 323 of commutator 113 lower limbs and lower brush 32 equals the largest deformation amount that lower brush 32 rakes 323 allow, therefore, the rake 323 of lower brush 32 can excessive deformation, after commutator 113 is in place, can elastic recovery to reset condition.
See also Figure 10, offer through hole 311 on seat board 31, lead 4 passes through hole 311, draws from through hole 311.Seat board 31 is provided with away from the end face 312 of casing 21 and is used to limit the lead that lead 4 moves and buckles, in the present embodiment, it is the lug 313 that is stretched on seat board 31 end faces 312 that described lead is buckled, it has two phases extension 3131 and two stop sections 3132 across a certain distance, extension 3131 goes out from seat board 31 end faces, 312 outside vertical extent, stop section 3132 is bent relatively to extend by two extensions 3131 and forms, and presses and put on lead 4.Like this, can directly bend to a direction after lead 4 is drawn from seat board 31, and be stuck in the lug 313, in the time of can avoiding motor oscillating, through hole 311 places of lead 4 roots and seat board 31 end faces 312 rub and rupture.
Separate two stop sections 3132 of above-mentioned lug 313, and certainly, it also can link together and form the stop section (not shown) of an integral body, and promptly the stop section connects two extensions 3131.
Please consult Fig. 6 again, the outer wall of trombone slide 222 1 ends and contacting with the internal face of casing 21, trombone slide 222 is stepped, and it is for the diameter at the sheathed position of magnet steel 223 diameter less than the position that contacts with casing 21.Motor has two bearings 221, and trombone slide 222 is between two bearings 221, and the bigger position of its diameter is set on one of them bearing 221, and magnet steel 223 is sheathed on another bearing 221 and the trombone slide 222 simultaneously.Because trombone slide 222 is less with the diameter of magnet steel 223 matching parts, and bigger with the diameter of casing 21 matching parts, like this, guaranteeing that trombone slide 222 is with casing 21 contacts area and when adhering to dynamics, can increase magnet steel 223 wall thickness, thereby improve the table magnetic of magnet steel 223, improve the combination property of motor.In addition, trombone slide 222 diameters are set in one of them axle 221 than large part and hold, and another bearing 221 is set up in parallel in rotating shaft 111 with trombone slide 222, can make bearing 221 external diameters be unlikely to too little like this, is convenient to bearing 221 processing.
See also Figure 11, the commutator 113 in the present embodiment is the commutations of five utmost points, and it has five commutator segments.Like this, the spacing between the commutator segment is less, and spark is less, and motor commutation is steady, reliable, thereby guarantees that motor properties is better, operation is more steady.
Depression is bent to form a depression position 3221 on the vertical component effect 322 of above-mentioned brush 32, and with ccontaining lead 4 (as shown in Figure 9), the brush 32 in the present embodiment adopts spot welding to be connected with lead 4.Welding is undertaken by spot welding frock assembly, sees also Figure 12 and Figure 13, and described spot welding frock assembly comprises soldering tip 6, the frock 7 of placing brush 32 and the fixed leg 8 of fixing tool 7.Frock 7 is strip, vertical fixing is in the cylinder of fixed leg 8, the roughly rectangular triangle of its radial section, have end face 71, with vertical facade 72 of end face 71 and the inclined-plane 73 that is connected end face 71 and facade 72, end face 71 is provided with groove 711, and the angle of inclination on inclined-plane 73 is consistent with the angle of inclination of brush 32 rakes 323.
During welding, brush 32 is mounted on the frock 7, make vertical component effect 322, straight plate part 321 and rake 323 be posted by end face 71, facade 72 and the inclined-plane 73 of frock 7 respectively, and depression position 3221 is positioned at the groove 711 of end face 71, lead 4 is mounted in the depression position 3221 of brush 32 vertical component effects 322, carries out spot welding by soldering tip 6.
High current discharge is adopted in spot welding, makes tin on the lead 4 melt the back fast and is connected with brush 32, and its discharge is fast, spark is little, and the pernicious gas of eliminating is few, and in addition, the tin amount on the lead 4 tin heads is few, and is few with the tin amount with respect to manual scolding tin, so compares environmental protection; On the other hand, spot welding can adopt semiautomatic equipment to carry out, and relatively low to operating personnel's welding technical ability requirement, production efficiency is higher, and can control the size of bump.
The above only is preferred embodiment of the present utility model; not in order to restriction the utility model; all any modifications of within spirit of the present utility model and principle, being done, be equal to and replace and improvement etc., all should be included within the protection range of the present utility model.
Claims (9)
1. be convenient to the Ultraminiature continuous current dynamo that brush is installed for one kind, comprise rotor, stator and brush group; Described rotor comprises rotor rack and winding, the commutator that described rotor rack comprises rotating shaft, is sheathed on the retainer ring of described rotating shaft one end and is positioned at described rotating shaft one end; Described stator comprises casing and is positioned at the magnet steel combination of described casing, and described magnet steel combination comprises the bearing that is sheathed in the described rotating shaft, be sheathed on the trombone slide in the described rotating shaft and be sheathed on magnet steel on the described trombone slide; Described brush group comprises the seat board that is positioned at described casing one end and is installed on the described seat board, and be positioned at described casing on, lower brush, described seat board convexes with two projections near on the end face of described casing, the outside of each projection and projection across a certain distance position mutually are provided with cylinder, described brush is connected with a lead respectively, each brush has straight plate part, the vertical component effect that goes out by an end vertical extent of described straight plate part, and the rake that goes out by the other end bending diagonally extending of described straight plate part, described straight plate part is between described projection and cylinder; It is characterized in that: described cylinder is provided with draw-in groove, outwards convexes with spacer on the straight plate part of described brush, and the straight plate part of described brush and vertical component effect all are close to described projection, and described spacer is positioned at described draw-in groove.
2. the Ultraminiature continuous current dynamo of being convenient to the brush installation as claimed in claim 1, it is characterized in that: described seat board is provided with centre bore and commutator installation slide rail near the central authorities of the end face of described casing, one end of described slide rail is connected with described centre bore, its lower limb and described centre bore edge are tangent, and the spacing between its lower limb and the described lower brush rake equals the deformation quantity that described lower brush rake allows.
3. the Ultraminiature continuous current dynamo of being convenient to the brush installation as claimed in claim 1, it is characterized in that: offer through hole on the described seat board, described lead passes described through hole, draws from described through hole; Described seat board is provided with away from the end face of described casing and is used to limit the lug that described lead moves.
4. the Ultraminiature continuous current dynamo of being convenient to the brush installation as claimed in claim 3, it is characterized in that: described lug has two phases extension and two stop sections across a certain distance, described extension stretches out from described seat board end face, described stop section is bent relatively to extend by described two extensions and forms, and presses and put on described lead.
5. the Ultraminiature continuous current dynamo of being convenient to the brush installation as claimed in claim 3, it is characterized in that: described lug has two a phases extension and stop section across a certain distance, described extension stretches out from described seat board end face, described stop section connects described two extensions, and presses and put on described lead.
6. the Ultraminiature continuous current dynamo of being convenient to the brush installation as claimed in claim 1, it is characterized in that: the outside wall surface of described trombone slide one end contacts with the internal face of described casing, described trombone slide is stepped, and it supplies the diameter of the diameter at the sheathed position of described magnet steel less than the position that contacts with described casing.
7. the Ultraminiature continuous current dynamo of being convenient to the brush installation as claimed in claim 6, it is characterized in that: described motor has two bearings, described trombone slide is between two bearings, and the position that its diameter is bigger is set on one of them bearing, and described magnet steel is sheathed on another bearing and the trombone slide simultaneously.
8. the Ultraminiature continuous current dynamo of being convenient to the brush installation as claimed in claim 1 is characterized in that: described commutator is the commutations of five utmost points, and it has five commutator segments.
9. the Ultraminiature continuous current dynamo of being convenient to the brush installation as claimed in claim 1 is characterized in that: described brush adopts spot welding to be connected with lead.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010200566632U CN201656635U (en) | 2010-01-18 | 2010-01-18 | Ultraminiature DC motor with convenient mounting of electric brushes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010200566632U CN201656635U (en) | 2010-01-18 | 2010-01-18 | Ultraminiature DC motor with convenient mounting of electric brushes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201656635U true CN201656635U (en) | 2010-11-24 |
Family
ID=43121869
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010200566632U Expired - Fee Related CN201656635U (en) | 2010-01-18 | 2010-01-18 | Ultraminiature DC motor with convenient mounting of electric brushes |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201656635U (en) |
-
2010
- 2010-01-18 CN CN2010200566632U patent/CN201656635U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101124 Termination date: 20160118 |
|
| EXPY | Termination of patent right or utility model |