CN103811964A - Motor with brush - Google Patents
Motor with brush Download PDFInfo
- Publication number
- CN103811964A CN103811964A CN201310483012.XA CN201310483012A CN103811964A CN 103811964 A CN103811964 A CN 103811964A CN 201310483012 A CN201310483012 A CN 201310483012A CN 103811964 A CN103811964 A CN 103811964A
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- brush
- porousness
- porousness parts
- commutator
- parts
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Abstract
The invention provides a motor with a brush, which can effectively provide air-supply lubricant for the joint between the diode and an electrical brush. In the motor with a brush (1), a porous component (6) is fixed to a position of the electrical brush (8), nearer to the tail end side (81) of a bending part (83) through bonding materials. The porous component (6) is provided with a gas phase lubricant (60). A steam supply source of the gas phase lubricant is adjacent to the joint part between the diode (7) and the electrical brush (8), and thereby the steam of the gas phase lubricant can be effectively supplied to the joint part. The porous component (6) is bonded with the electrical brush (8) through bonding materials, and thereby vibration reduction of the electrical brush (8) can be achieved.
Description
Technical field
The present invention relates to a kind of brush motor, its have with the brush of the outer peripheral face Elastic Contact of the commutator of rotor one rotation.
Background technology
In the past, brush motor had following structure: be provided with the commutator rotating with rotor one, and the outer peripheral face Elastic Contact of brush and commutator.In the brush motor of this structure, thereby can there is brush and commutator abrasion and produce the problem of conducting obstacle.And, also can occur to be attached to commutator and brush because the frictional heat between commutator and brush etc. causes the organic gas oxidation in motor shell, thereby produce the problem of conducting obstacle.Therefore, someone has proposed following technical scheme: the gas phase lubricants such as polyalcohol are remained on to the porousness parts place that is arranged at motor shell bottom, utilize the steam of the gas phase lubricant producing in motor shell to reduce wearing and tearing and the frictional heat (with reference to patent documentation 1) at the contact place of commutator and brush.
Patent documentation 1: TOHKEMY 2001-136714 communique
But, in the structure described in patent documentation 1, because the porousness component configuration of the supply source of the steam as gas phase lubricant is in the bottom of motor shell, therefore the supply source of the steam of gas phase lubricant and contact away from.Therefore, the steam of gas phase lubricant does not offer the contact portions of commutator and brush fully, thereby has the problem that can not effectively utilize lubricant.
Summary of the invention
In view of above problem, the problem that the present invention need to solve is to provide a kind of brush motor that gas phase lubricant can be provided to the contact portions of commutator and brush efficiently.
For solving above-mentioned problem, the present invention is a kind of brush motor, its have rotor, with the commutator of this rotor one rotation and with the brush of the outer peripheral face Elastic Contact of this commutator, described brush motor is characterised in that, maintain porousness parts at described brush, maintain gas phase lubricant at these porousness parts.
In the present invention, owing to maintaining porousness parts at brush, maintain gas phase lubricant at these porousness parts, therefore the supply source of the steam of gas phase lubricant (porousness parts) is positioned at the position near the contact portions of commutator and brush.Therefore, the steam of gas phase lubricant can be provided efficiently to contact portions, thereby the sliding contact characteristic of the contact portions of commutator and brush can be improved.
In the present invention, preferred described brush has bend in the part midway of length direction, and described porousness parts are maintained at than described bend by position described brush and contact described commutator place side.According to this structure, the supply source of the steam of gas phase lubricant, near the contact portions of commutator and brush, therefore can provide gas phase lubricant to contact portions efficiently.
In the present invention, the part contacting with described commutator of preferred described brush becomes the ctenii portion that is divided into veteranellinae shape, and at least a portion of described porousness parts is maintained at described ctenii portion.According to this structure, the supply source of the steam of gas phase lubricant, near the contact portions of commutator and brush, therefore can provide the steam of gas phase lubricant efficiently to contact portions.
In the present invention, the region that preferred described porousness parts are maintained at described ctenii portion and stretch out to the end side of the length direction of described brush from described ctenii portion.According to this structure, the area that is provided with porousness parts is large, thereby can increase the maintenance dose of gas phase lubricant.Thus, the steam of gas phase lubricant can be provided chronically to the contact portions of commutator and brush, thereby reliability of brush motor etc. can be improved.
The structure that in the present invention, can adopt described porousness parts to be bonded together with described brush by the bonding material layer between these porousness parts and described brush.
In the present invention, preferably at the surface layer lamination shape crust of the side contrary with described brush of described porousness parts.According to this structure, can suppress the evaporation rate from the gas phase lubricant of porousness parts, thereby the steam of gas phase lubricant can be provided to the contact portions of commutator and brush chronically.Thus, can improve the reliability etc. of brush motor.
In the present invention, preferred described porousness parts play the effect for the vibration absorber to described brush damping.According to this structure, even if do not append other parts and also can be configured for by porousness parts the vibration absorber of damping.
In the present invention, the entirety of preferred described porousness parts is maintained at described ctenii portion.
In the present invention, 1/3rd to 1/2nd of the described bend place side of preferred described porousness component configuration on the length direction of described brush region.
In the present invention, preferably expose the face of a side contrary with described brush of described porousness parts.
In the present invention, preferred described porousness parts are felt materials, maintain the described gas phase lubricant being in a liquid state at this felt materials place.
In the present invention, owing to maintaining porousness parts at brush place, and maintain gas phase lubricant at this porousness parts place, therefore the supply source of the steam of gas phase lubricant is near the contact portions of commutator and brush.Thus, can provide efficiently the steam of meteorological lubricant to contact portions, so can improve the sliding contact characteristic of the contact portions of commutator and brush.Therefore, the electrical wear that can reduce the mechanical wear that causes because of the sliding contact of commutator and brush and cause because of the spark (electric arc) producing in the time that energising is switched, thus can improve the reliability etc. of brush motor.
Accompanying drawing explanation
Fig. 1 is the integrally-built cutaway view that represents the related brush motor of embodiments of the present invention 1.
Fig. 2 is the key diagram of brush of the related brush motor of embodiments of the present invention 1 etc.
Fig. 3 is the key diagram of porousness parts of the brush motor related for embodiments of the present invention 1 etc.
Fig. 4 represents the brush of the brush motor taking-up related from embodiments of the present invention 2 and the cutaway view of brush carrier.
Embodiment
With reference to accompanying drawing, an example applying motor of the present invention is described.In addition, in the following description, in motor axis direction L, the side that rotating shaft is given prominence to from motor shell, as outlet side L1, describes from the opposition side of the outstanding side of motor shell rotating shaft as output opposition side L2.
Execution mode 1
(overall structure of brush motor)
Fig. 1 is the integrally-built cutaway view that represents the related brush motor of embodiments of the present invention 1.Fig. 2 is the key diagram of the brush of the related brush motor of embodiments of the present invention 1 etc., Fig. 2 (a), Fig. 2 (b) are the brush that represents to take out from brush motor etc. vertical view and cutaway view.In addition, in Fig. 2 (a), omit the diagram of journal bearing etc., and in Fig. 2 (b), omitted the diagram of commutator and rotating shaft etc.
In Fig. 1, the brush motor 1 of present embodiment is for there being the small direct current motor of brush, and the output end of rotating shaft 51 is outstanding from the upper surface that is positioned at outlet side L1 31 of the motor shell 3 of cup-shaped.In the inside of motor shell 3, the method such as be pressed in the substantial middle part utilization of the motor axis direction L of rotating shaft 51 and be fixed with iron core 52, described iron core 52 is formed by stacked magnetic sheet.Outer circumferential side equal angles compartment of terrain at iron core 52 is formed with multiple salient poles, and at multiple salient poles coil 53 of reeling respectively, thereby form armature 50.Thus, armature 50 and rotating shaft 51 have formed rotor 5 that can one rotation.
Inner peripheral surface in the cylindrical body portion 32 of motor shell 3 is connected with the permanent magnet 20 that is geomagnetic into multiple magnetic poles, and permanent magnet 20 is across gap and the iron core 52(salient pole of regulation) outer peripheral face opposed.In motor shell 3, at the openend of output opposition side L2 opening, resinous brush carrier 4 is installed, motor shell 3 and brush carrier 4 form the fixation side parts 2 of brush motor 1.In the present embodiment, while observation from motor axis direction L, motor 1 has the shape two ends of opposed straight line portion being connected together by circular arc portion, and is connected with at the inner peripheral surface of this circular arc portion the permanent magnet 20 that is divided into two.
The output end of rotating shaft 51 is supported as rotating by journal bearing 91, described journal bearing 91 is maintained at the upper surface 31 of motor shell 3, in the part being supported by journal bearing 91 of rotating shaft 51 and be connected with between the part of iron core 52, be inserted with packing ring 92 and the seal member 93 of sleeve-shaped.
There is the bottom surface of round-ended cylinder portion 42 end of the output opposition side L2 of rotating shaft 51 in axially mounting, is maintained at journal bearing 96 supporting of inside of round-ended cylinder portion 42 for rotating, described in have round-ended cylinder portion 42 to be formed at brush carrier 4.And, at the output opposition side of rotating shaft 51 L2, be inserted with seal member 97 in the position adjacent with the part being supported by journal bearing 96.
The part by output opposition side L2 at rotating shaft 51 forms the commutator 7 having with rotating shaft 51 one rotations, and has rheostat 75(extinguishing arc element in the position configuration adjacent with this commutator 7).Commutator 7 has and is fixed on the resinous sleeve 71 of rotating shaft 51 and the commutator segment 72 in the outer peripheral face equal angles arranged spaced of this sleeve 71.
As shown in Figure 2, the end side 81 of a pair of brush 8 respectively with the outer peripheral face Elastic Contact of commutator 7, the base end side 82 of this pair of brush 8 is kept by brush carrier 4 respectively.Here, a pair of brush 8 has respectively the ctenii portion 80 that the end side 81 contacting with commutator 7 is to veteranellinae shape and is divided into three joints.
The brush carrier 4 of Fig. 1 and Fig. 2 is formed by flange part 41, heavy section 43 and recess 44, described flange part 41 is overlapping with the open end of motor shell 3, described heavy section 43 is connected with terminal 99 in the inner side of described flange part 41, described recess 44 forms the space that can configure brush 8 around commutator 7, the middle position of this recess 44 be formed with keep journal bearing 96 have a round-ended cylinder portion 42.In the flat shape of the rectangle of recess 44, opposed a pair of diagonal angle part 441 is utilized the barbed portion 431 of heavy section 43 and is formed open toward the outer side state mutually, and mutually opposed another to diagonal angle part 443 in, slit 45 extends towards heavy section 43.These cracks 45 respectively with the shape linearly extension accordingly of brush 8, and the wall 451 in the intake section of crack 45 outside is with the mode bending of the shape of the bend 83 along brush 8.
For the brush carrier 4 of this structure, the base end side 82 of a pair of brush 8 is separately fixed in slit 45.In the inside of slit 45, the base end side 82 of brush 8 and terminal 99 directly or be electrically connected by the distribution component such as substrate or wire.
(improving the method for the sliding contact characteristic between commutator 7 and brush 8)
Fig. 3 is the key diagram of the porousness parts of the brush motor 1 related for embodiments of the present invention 1 etc., and the key diagram of the second case that the key diagram of the first case under state and the surface of porousness parts covered by the crust of sheet is being exposed on the surface that Fig. 3 (a), Fig. 3 (b) are porousness parts.
In the brush motor 1 of this structure, in the present embodiment, as shown in Figure 2, maintain flat porousness parts 6 at two brush 8 places respectively, and in these porousness parts 6, immerse and maintain the gas phase lubricant 60 being formed by the polyalcohol of ethylene glycol or propylene glycol etc.Here, porousness parts 6 are for example felt materials, maintain the gas phase lubricant 60 being in a liquid state in porousness parts 6.In addition, except polyalcohol, also can use paraffin class, olefines, unary alcohol, ether alcohol class etc. as gas phase lubricant, and, also can use the mixture of the solvent that solvent that boiling point is higher and boiling point are lower as gas phase lubricant 60.
In the present embodiment, porousness parts 6 are maintained at the face 88 by end side 81 than the bend of brush 8 83, and described face 88 is positioned at the opposition side of brush 8 and commutator 7 contact sides.And at least a portion of porousness parts 6 is maintained at the ctenii portion 80 of brush 8.In the present embodiment, porousness parts 6 be configured in 83 place sides of bend on the length direction of brush 8 in ctenii portion 80 roughly 1/3rd to 1/2nd region roughly, and the entirety of porousness parts 6 and ctenii portion 80 overlapping.Therefore, on the length direction of brush 8, the position deflection bend 83 place sides that the set position of porousness parts 6 contacts with commutator 7 from brush 8, the position (contact) that brush 8 contacts with commutator 7 is not overlapping with porousness parts 6.
Like this in the time that porousness parts 6 are fixed on to brush 8, except can adopt by porousness parts 6 are carried out crimping etc. by porousness parts 6 and brush 8 directly fixing mode and by binding agent by mode fixing to porousness parts 6 and brush 8, as shown in Fig. 3 (a), Fig. 3 (b), can also adopt the mode with brush 8 by the fixing porousness parts 6 of bonding material layer 65 between porousness parts 6 and brush 8.Now, except can adopting the structure of face of the side contrary with brush 8 of exposing porousness parts 6 as shown in Fig. 3 (a), also can adopt the surface layer of the side contrary with brush 8 sides at porousness parts 6 as shown in Figure 3 (b) to fold the structure of the sheet crusts 66 such as resin sheet.
(the main effect of present embodiment)
In the brush motor 1 of present embodiment, in the time that rotor 5 rotates, commutator 7 is also rotated, thus commutator 7 and brush 8 sliding contacts.Here, maintain porousness parts 6 at brush 8, and maintain at porousness parts 6 the gas phase lubricant 60 being formed by polyalcohol etc.Therefore the steam, producing from gas phase lubricant 60 can improve the sliding contact at the contact place of commutator 7 and brush 8.The electrical wear that can reduce thus the mechanical wear that causes because of commutator 7 and the sliding contact of brush 8 and cause because of the spark (electric arc) of generation in the time that energising is switched.
And because the porousness parts 6 in the generation source of the steam as gas phase lubricant 60 are kept by brush 8, therefore the generation source of the steam of gas phase lubricant 60 is positioned near at the contact position of commutator 7 and brush 8.Especially in the present embodiment, porousness parts 6 are maintained at the position by end side 81 than the bend of brush 8 83, and porousness parts 6 are maintained at the position overlapping with ctenii portion 80.Therefore, the supply source of the steam of gas phase lubricant 60 is the contact portions with brush 8 near commutator 7, thereby the steam of gas phase lubricant 60 can be provided to contact portions efficiently.Therefore, can effectively improve the sliding contact characteristic of the contact portions of commutator 7 and brush 8.Thus, mechanical wear and electrical wear between commutator 7 and brush 8 can be reduced reliably, thereby reliability of brush motor 1 etc. can be improved.
And, in the present embodiment, porousness parts 6 be can strain parts, and be maintained at the position by end side 81 than the bend of brush 8 83.Therefore, porousness parts 6 play the effect for the vibration absorber to brush 8 dampings.Especially in the present embodiment,, because porousness parts 6 are bonded together with brush 8 by bonding material layer 65, therefore effectively play the effect for the vibration absorber to brush 8 dampings.Like this in the present embodiment, because porousness parts 6 play the effect for the vibration absorber of damping, also can alleviate even if therefore vibration absorber is not set separately the mechanicalness noise producing because of end side 81 high vibrations of brush 8.And, owing to can alleviating end side 81 high vibrations of brush 8, thereby can prevent wearing and tearing and the breakage of commutator 7 and brush 8.That is to say, if brush 8 in vibration with commutator 7 sliding contacts and produce coagulative words, just can produce the electrical wear of condensing wearing and tearing and causing because of spark therefore causing, and by present embodiment, can suppress the generation of these wearing and tearing.
In addition, as shown in Fig. 3 (a), if adopt the structure of face of a side contrary with brush 8 sides of exposing porousness parts 6, can improve the evaporation rate from the gas phase lubricant 60 of porousness parts 6, and can increase the quantity of steam of the gas phase lubricant 60 that docking point part provides.
On the other hand, as shown in Figure 3 (b), if at the surface layer lamination shape crust 66 of the side contrary with brush 8 of porousness parts 6, can suppress the evaporation rate from the gas phase lubricant 60 of porousness parts 6, thereby docking point part provides the steam of gas phase lubricant 60 chronically.Thus, can improve brush motor 1 reliability etc.And, if at the surface layer lamination shape crust 66 of the side contrary with brush 8 of porousness parts 6, the corresponding increase of quality, thus can play better the effect for the vibration absorber of damping.
Fig. 4 represents the brush 8 that takes out from the related brush motor 1 of embodiments of the present invention 2 and the cutaway view of brush carrier 4.In addition, the basic structure of present embodiment is identical with execution mode 1, and also the description thereof will be omitted therefore corresponding part to be marked to identical symbol.
In execution mode 1, only the ctenii portion 80 in brush 8 is provided with porousness parts 6, and in the present embodiment, and as shown in Figure 4, porousness parts 6 are maintained at the region that the end side of ctenii portion 80 and the length direction from ctenii portion 80 to brush is stretched out.More specifically the region that, porousness parts 6 are maintained at ctenii portion 80 and base end side 82 from from ctenii portion 80 to brush 8 stretches out.Therefore, the Area Ratio execution mode 1 that is provided with porousness parts 6 is large, so can increase the maintenance dose of gas phase lubricant 60.Thus, can provide chronically the steam of gas phase lubricant 60 to commutator 7 and the contact portions of brush 8, therefore can improve the reliability of brush motor 1 etc.
Other execution modes
In the above-described embodiment, as porousness parts 6, exemplified with felt materials, but also can use fibrous or granular active carbon, zeolite, molecular sieve etc. are shaped as to parts tabular and that obtain.During for this structure, although porousness parts 6 itself do not have elasticity, if be fixed on brush 8 by bonding material layer 65, will utilize the strain of bonding material layer 65 and play the effect for the vibration absorber of damping.
In the above-described embodiment, porousness parts 6 are arranged on to the ctenii portion 80 of brush 8, but also can porousness parts 6 be set with ctenii portion 80 nonoverlapping position.And, in the above-described embodiment, porousness parts 6 are arranged on to the position of leaning on base end side 82 than brush 8 and the contact portions of commutator 7, but also can by the position of end side 81, porousness parts 6 be set than brush 8 and the contact portions of commutator 7.And in the above-described embodiment, porousness parts 6 are arranged on the face 88 of the opposition side of the side contacting with commutator 7 of brush 8, but porousness parts 6 also can be arranged on the face of the side contacting with commutator 7 of brush 8.
Claims (11)
1. a brush motor, it has:
Rotor;
Commutator, itself and described rotor one are rotated; And
Brush, the outer peripheral face Elastic Contact of itself and described commutator,
Described brush motor is characterised in that,
Maintain porousness parts at described brush,
Maintain gas phase lubricant at described porousness parts.
2. brush motor according to claim 1, is characterized in that,
Described brush has bend in the part midway of length direction,
Described porousness parts are maintained at than described bend by position described brush and contact described commutator place side.
3. brush motor according to claim 1 and 2, is characterized in that,
The part contacting with described commutator of described brush becomes the ctenii portion that is divided into veteranellinae shape,
At least a portion of described porousness parts is maintained at described ctenii portion.
4. brush motor according to claim 3, is characterized in that,
The region that described porousness parts are maintained at described ctenii portion and stretch out to the end side of the length direction of described brush from described ctenii portion.
5. want the brush motor described in 1 according to right, it is characterized in that,
Described porousness parts are bonded together with described brush by the bonding material layer between these porousness parts and described brush.
6. brush motor according to claim 1, is characterized in that,
Face in the side contrary with described brush of described porousness parts is laminated with sheet crust.
7. brush motor according to claim 1, is characterized in that,
Described porousness parts play the effect for the vibration absorber to described brush damping.
8. brush motor according to claim 3, is characterized in that,
The entirety of described porousness parts is maintained at described ctenii portion.
9. brush motor according to claim 2, is characterized in that,
A region of/3rd to 1/2nd of the described bend place side of described porousness component configuration on the length direction of described brush.
10. brush motor according to claim 1, is characterized in that,
Expose the face of a side contrary with described brush of described porousness parts.
11. brush motors according to claim 1, is characterized in that,
Described porousness parts are felt materials, maintain the described gas phase lubricant being in a liquid state at this felt materials place.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012244231A JP2014093894A (en) | 2012-11-06 | 2012-11-06 | Motor with brush |
| JP2012-244231 | 2012-11-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103811964A true CN103811964A (en) | 2014-05-21 |
Family
ID=50380729
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310483012.XA Pending CN103811964A (en) | 2012-11-06 | 2013-10-15 | Motor with brush |
| CN201320636506.2U Expired - Fee Related CN203521854U (en) | 2012-11-06 | 2013-10-15 | Brushed motor |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320636506.2U Expired - Fee Related CN203521854U (en) | 2012-11-06 | 2013-10-15 | Brushed motor |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2014093894A (en) |
| CN (2) | CN103811964A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111799957A (en) * | 2019-04-05 | 2020-10-20 | 马渊马达株式会社 | Brush motor |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014093894A (en) * | 2012-11-06 | 2014-05-19 | Nidec Sankyo Corp | Motor with brush |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85105746A (en) * | 1985-07-25 | 1987-01-28 | 松下电器产业株式会社 | Micro-machine |
| JP2001136714A (en) * | 1999-11-02 | 2001-05-18 | Matsushita Electric Ind Co Ltd | Small motor |
| CN203521854U (en) * | 2012-11-06 | 2014-04-02 | 日本电产三协株式会社 | Brushed motor |
-
2012
- 2012-11-06 JP JP2012244231A patent/JP2014093894A/en active Pending
-
2013
- 2013-10-15 CN CN201310483012.XA patent/CN103811964A/en active Pending
- 2013-10-15 CN CN201320636506.2U patent/CN203521854U/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85105746A (en) * | 1985-07-25 | 1987-01-28 | 松下电器产业株式会社 | Micro-machine |
| JP2001136714A (en) * | 1999-11-02 | 2001-05-18 | Matsushita Electric Ind Co Ltd | Small motor |
| CN203521854U (en) * | 2012-11-06 | 2014-04-02 | 日本电产三协株式会社 | Brushed motor |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111799957A (en) * | 2019-04-05 | 2020-10-20 | 马渊马达株式会社 | Brush motor |
| CN111799957B (en) * | 2019-04-05 | 2022-11-01 | 马渊马达株式会社 | Brush motor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN203521854U (en) | 2014-04-02 |
| JP2014093894A (en) | 2014-05-19 |
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| PB01 | Publication | ||
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Application publication date: 20140521 |