CN104821683B - Anti- motor bearings electric corrosion structure and plastic-sealing brushless DC motor - Google Patents
Anti- motor bearings electric corrosion structure and plastic-sealing brushless DC motor Download PDFInfo
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- CN104821683B CN104821683B CN201510202229.8A CN201510202229A CN104821683B CN 104821683 B CN104821683 B CN 104821683B CN 201510202229 A CN201510202229 A CN 201510202229A CN 104821683 B CN104821683 B CN 104821683B
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Abstract
The present invention is suitable for motor field, disclose anti-motor bearings electric corrosion structure and plastic-sealing brushless DC motor, wherein, anti- motor bearings electric corrosion structure includes shaft, it is installed on the first bearing of shaft one end, the first bearing bracket being sheathed on outside first bearing, the conductive shroud being conductively connected with first bearing bracket and the elastic conduction component being conductively connected between conductive shroud and shaft, conductive shroud is sheathed on outside first bearing bracket, shaft, which has, to be pierced by out of first bearing bracket and extends into the extension in conductive shroud, elastic conduction component is installed in conductive shroud and is resiliently attached between conductive shroud and extension.The present invention, pass through the setting of conductive shroud and elastic conduction component, realize being conductively connected for coil support and outer coil support in first bearing, eliminate the potential difference between coil support and outer coil support in first bearing, preventing first bearing, there is a phenomenon where galvanic corrosion, and the manufacturing cost of its first bearing is low, impact resistance is good, load capacity is good.
Description
Technical field
The invention belongs to motor field more particularly to anti-motor bearings electric corrosion structure and there is the anti-motor bearings galvanic corrosion knot
The plastic-sealing brushless DC motor of structure.
Background technology
In traditional plastic-sealing brushless DC motor, due to that can have current potential between the interior coil support and outer coil support of bearing
Difference, so, it is easy to make bearing that there is a phenomenon where galvanic corrosion, has seriously affected the service life of bearing.
Galvanic corrosion phenomenon occurs for the bearing of plastic-sealing brushless DC motor in order to prevent, and the prior art is proposed using Ceramic Balls axis
The design scheme (i.e. rolling ball body is made of ceramic material) held, the design scheme can make the interior coil support and outer ring branch of bearing
It insulate between frame, to can reach the purpose for preventing bearing from galvanic corrosion phenomenon occurs.However, the design scheme is deposited in a particular application
In following shortcoming：Requirement of the ceramic ball bearing to material and processing technology is relatively high, so that the system of ceramic ball bearing
It causes this higher, is unfavorable for the popularization and application on motor；And due to being limited by ceramic material characteristic, it can make ceramics
The impact resistance and load capacity of ball bearing are all poor, it is therefore provided that the application scenario of ceramic ball bearing is very restricted.
Invention content
It is an object of the invention to overcome above-mentioned the deficiencies in the prior art, anti-motor bearings electric corrosion structure and plastic packaging are provided
The manufacturing cost of brshless DC motor, anti-motor bearings electric corrosion structure is low, and solves due to bearing inner race holder and outer ring
There is technical issues that potential difference between holder and causes bearing.
In order to achieve the above objectives, the technical solution adopted by the present invention is：Anti- motor bearings electric corrosion structure, including shaft, peace
First bearing loaded on described shaft one end, the first bearing bracket being sheathed on outside the first bearing, with the first bearing
The conductive shroud that bracket is conductively connected and the elastic conduction component being conductively connected between the conductive shroud and the shaft, institute
It states conductive shroud to be sheathed on outside the first bearing bracket, the shaft, which has, to be pierced by and extend out of described first bearing bracket
Enter the extension in the conductive shroud, the elastic conduction component is installed in the conductive shroud and is resiliently attached to described
Between conductive shroud and the extension.
Preferably, the elastic conduction component includes conductive slider and is resiliently attached to the conductive slider and the conduction
The end back to the elastic component of elastic component between case, the conductive slider is resisted against on the extension.
Preferably, the conductive shroud has the cavity with first bearing bracket suit cooperation, the cavity convex
Equipped with the mounting base opposite with the extension, the mounting base is equipped with shrinkage pool of the opening towards the extension, the bullet
Property part and the conductive slider be all installed in the shrinkage pool, and the conductive slider has that convex to be exposed to the shrinkage pool outer and extend
The exposed parts being resisted against on the extension.
Preferably, the shrinkage pool, which has, leads with its opposite recessed bottom wall that is open, the elastic component elastic compression in described
Between electric sliding block and the recessed bottom wall of the shrinkage pool.
Preferably, the end back to the elastic component of the conductive slider is in cone tip shape, and the top of the conductive slider
Cusp is resisted against on the extension.
Preferably, the top point of the conductive slider is resisted against the extension along the central axis extension of the shaft
Center axial position.
Preferably, above-mentioned anti-motor bearings electric corrosion structure further includes the powder for preventing the conductive slider abrasion from generating
End falls into the counteraction member in the first bearing, and the counteraction member is set on the extension.
Preferably, the axis hole for being equipped with and being worn for the shaft, and the first bearing are run through on the first bearing bracket
Bracket further extends outward along the edge of the axis hole and is convexly equipped with turnup structure, and the counteraction member includes being set with the extension
It the plate-like body of cooperation and is convexly equipped in the plate-like body and is sheathed on outside the turnup structure towards the first bearing
Collar flange.
Preferably, the periphery of the extension is recessed with a cyclic annular card slot, and the plate-like body installation is positioned at the ring
In shape card slot.
Anti- motor bearings electric corrosion structure provided by the invention, is conductively connected first bearing bracket, and lead to by conductive shroud
It crosses the elastic conduction component being installed in conductive shroud and is conductively connected conductive shroud and shaft, to realize first bearing bracket
With being conductively connected for shaft；And since the outer coil support of first bearing bracket and first bearing is conductive contact connection, shaft
With the interior coil support of first bearing it is that conductive contact is connect, therefore, the setting of conductive shroud and elastic conduction component is realized indirectly
Coil support and outer coil support are conductively connected in first bearing, so eliminate in first bearing coil support and outer coil support it
Between potential difference, effectively preventing first bearing, there is a phenomenon where galvanic corrosion, ensure that the service life of first bearing.Since it is
It carries out preventing first bearing from galvanic corrosion phenomenon occurs by the setting of conductive shroud and elastic conduction component, and it is not required to first
Insulating Design is done in the inside of bearing, therefore so that common metal bearing can be used in first bearing, in this way, conducive to first axle is reduced
The manufacturing cost held, and there is preferable impact resistance and load capacity conducive to guarantee first bearing.Meanwhile the present invention will be elastic
Conductive component is resiliently attached between conductive shroud and extension, can be conducive to ensure elastic conduction component and conductive shroud, extension
There is good conductive contact performance between portion, and then be conducive to fully ensure that elastic conduction component is conductively connected conductive shroud and prolongs
The reliability of extending portion.
Further, the present invention also provides plastic-sealing brushless DC motors, with above-mentioned anti-motor bearings galvanic corrosion knot
Structure.
Plastic-sealing brushless DC motor provided by the invention, as a result of above-mentioned anti-motor bearings electric corrosion structure, therefore, one
Aspect ensure that the service life of plastic-sealing brushless DC motor, on the other hand reduce being manufactured into for plastic-sealing brushless DC motor
This, another further aspect is conducive to expand the use occasion of plastic-sealing brushless DC motor.
Description of the drawings
Fig. 1 is the diagrammatic cross-section of anti-motor bearings electric corrosion structure provided in an embodiment of the present invention；
Fig. 2 is the diagrammatic cross-section of plastic-sealing brushless DC motor provided in an embodiment of the present invention.
Specific implementation mode
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
It should be noted that when element is referred to as on " being fixed on " or " being set to " another element, it can be direct
On another element or it may be simultaneously present centering elements.When an element is known as " connection " another element, it
Can be directly connected to another element or may be simultaneously present centering elements.
Only it is each other relatively it should also be noted that, the orientation term such as left and right, upper and lower, top, bottom in following embodiment
Concept or be reference with the normal operating condition of product, and should not be regarded as restrictive.
As depicted in figs. 1 and 2, anti-motor bearings electric corrosion structure provided in an embodiment of the present invention, including shaft 1, be installed on
The first bearing 2 of 1 one end of shaft, the first bearing bracket 3 being sheathed on outside first bearing 2 are conductively connected with first bearing bracket 3
Conductive shroud 4 and the elastic conduction component 5 that is conductively connected between conductive shroud 4 and shaft 1, conductive shroud 4 be sheathed on
Outside one bearing bracket 3, shaft 1, which has, to be pierced by out of first bearing bracket 3 and extends into the extension 11 in conductive shroud 4, bullet
Property conductive component 5 be installed in conductive shroud 4 and be resiliently attached between conductive shroud 4 and extension 11.First bearing bracket 3
It can be specifically made of conductive metallic material.Shaft 1 has along its axial oppositely arranged output end 12 and non-output end, first axle
The non-output end that 2, first bearing bracket 3, conductive shroud 4 and elastic conduction component 5 are all set to shaft 1 is held, i.e. extension 11 belongs to
In the non-output end of shaft 1, the end far from extension 11 of shaft 1 is the output end 12 of shaft 1.The output end 12 of shaft 1
Specially motor exports power to drive the end for waiting for the rotation of rotary part (not shown) outward.First bearing 2 is concretely
Rolling bearing comprising if the outer coil support of the interior coil support and the suit cooperation of first bearing bracket 3 that coordinate with the suit of shaft 1,
Dry circumferentially spaced rolling ball body between interior coil support and outer coil support and set on interior coil support and outer coil support
Between positioning the retainer of each rolling ball body.First bearing bracket 3 is specifically sheathed on outside outer coil support, and shaft 1 is arranged in
In interior coil support.In the present embodiment, interior coil support, outer coil support, the rolling ball body of first bearing 2 all use metal material system
At that is, first bearing 2 is common metal bearing, and manufacturing cost is low, and has preferable resistance to punching conducive to guarantee first bearing 2
Hitting property and load capacity, so as to the applicable situation range conducive to anti-motor bearings electric corrosion structure in expansion the present embodiment.This hair
The anti-motor bearings electric corrosion structure that bright embodiment provides, it is simple in structure, manufacturing cost is low, it is conductive especially by conductive shroud 4
First bearing bracket 3 is connected, and the elastic conduction component 5 by being installed in conductive shroud 4 is conductively connected conductive shroud 4 and turns
Axis 1, to realize being conductively connected for first bearing bracket 3 and shaft 1；And due to first bearing bracket 3 and first bearing 2
Outer coil support, which is conductive contact connection, shaft 1, with the interior coil support of first bearing 2 is that conductive contact is connect, therefore, conductive shield
The setting of shell 4 and elastic conduction component 5 realizes being conductively connected for coil support and outer coil support in first bearing 2, in turn indirectly
The potential difference between coil support and outer coil support in first bearing 2 is eliminated, first bearing 2 is effectively prevented and showing for galvanic corrosion occurs
As ensure that the service life of first bearing 2.Since it is prevented by the setting of conductive shroud 4 and elastic conduction component 5
Only galvanic corrosion phenomenon occurs for first bearing 2, and it is not required to do the inside of first bearing 2 insulating Design, therefore so that the anti-motor
Bearing electric corrosion structure has the characteristics that simple in structure, at low cost.Meanwhile elastic conduction component 5 is resiliently attached to lead by the present invention
Between electric cover shell 4 and extension 11, it can be conducive to ensure to have between elastic conduction component 5 and conductive shroud 4, extension 11 good
Conductive contact performance, and then conducive to fully ensuring that elastic conduction component 5 is conductively connected the reliable of conductive shroud 4 and extension 11
Property.
Preferably, as depicted in figs. 1 and 2, elastic conduction component 5 includes conductive slider 51 and is resiliently attached to conductive slider
The end back to elastic component 52 of elastic component 52 between 51 and conductive shroud 4, conductive slider 51 is resisted against on extension 11.It leads
The setting of electric sliding block 51 is mainly used for realizing being conductively connected between elastic conduction case 4 and shaft 1；And elastic component 52 is set
Set, may make elastic conduction component 5 have certain elastic telescopic ability, in this way, on the one hand be conducive to ensure conductive slider 51 with
Shaft 1 comes into full contact with, even and if so that conductive slider 51 still can be in the elastic masterpiece of elastic component 52 after having worn some materials
With the conductive contact of lower holding and extension 11, the reliability that conductive slider 51 is conductively connected with shaft 1 has been fully ensured that, it is another
Aspect its under the premise of ensureing that elastic conduction component 5 and shaft 1 have excellent conductive performance, can be conducive to reduce elastic conduction group
The mutual frictional force generated between part 5 and shaft 1, to conducive to ensureing smoothness that shaft 1 rotates and conducive to slowing down conductive cunning
The rate of wear of block 51.
Specifically, due to conductive slider 51 be for being conductively connected conductive shroud 4 and shaft 1, therefore, conductive slider 51 with
It should be all conductively connected between conductive shroud 4, conductive slider 51 and shaft 1.In the present embodiment, conductive slider 51 and shaft 1
Between be conductively connected be realization is contacted by directly supporting for conductive slider 51 and extension 11, and conductive slider 51 with lead
Conductive connection manner between electric cover shell 4 has following several specific implementation modes：Conductive slider 51 can by with conductive shroud 4
Realization is in direct contact to connect with the direct conduction of conductive shroud 4；Alternatively, conductive slider 51 also can be indirectly conductive by elastic component 52
Connect conductive shroud 4；Or conductive slider 51 also can both direct conduction connection conductive shroud 4 it is indirect further through elastic component 52
It is conductively connected conductive shroud 4, these types of specific implementation mode can all realize being conductively connected for conductive shroud 4 and conductive slider 51.
Preferably, as depicted in figs. 1 and 2, conductive shroud 4 has the cavity 411 with the suit cooperation of first bearing bracket 3,
The mounting base 43 opposite with extension 11 is convexly equipped in cavity 411, mounting base 43 is equipped with shrinkage pool of the opening towards extension 11
431, towards the opening with cavity 411 towards unanimously, the inner surface contour of shrinkage pool 431 substantially can connect to be formed the opening of shrinkage pool 431
One U-shaped structure, elastic component 52 and conductive slider 51 are all installed in shrinkage pool 431, and are had between mounting base 43 and extension 11
Spacing, conductive slider 51 have the convex shrinkage pool 431 that is exposed to outer and extend the exposed parts being resisted against on extension 11,52 bullet of elastic component
Property is compressed between the bottom wall of shrinkage pool 431 and conductive slider 51.Conductive slider 51 is realized by way of convex be exposed to outside shrinkage pool 431
It is contacted with supporting for shaft 1, can be conducive to prevent from generating between extension 11 and mounting base 43 to contact with each other, to be conducive to avoid pacifying
The rotation for filling 43 countershaft 1 of seat generates interference phenomenon.The setting of shrinkage pool 431 can move the elastic telescopic of elastic conduction component 5
Play the role of guide and limit, to conducive to preventing the distortion of elastic component 52 flexible, ensure that the elastic telescopic of elastic conduction component 5
The accuracy of movement locus.
Preferably, conductive slider 51 can be in direct contact with the inner wall of shrinkage pool 431, to realize conductive slider 51 and conduction
The being in direct contact property of case 4 is conductively connected.Embodiment as a further improvement, between conductive slider 51 and shrinkage pool 431
Cooperation is also provided with the structure for preventing conductive slider 51 from relative rotation occurring in shrinkage pool 431, such as：It can be in shrinkage pool 431
Inner wall on setting guide chute (not shown), on conductive slider setting can card insertion in the guide rib (figure in guide chute
Do not show)；Alternatively, can also be arranged on conductive slider guide chute, on the inner wall of shrinkage pool 431 setting can card insertion in guide chute
Interior guide rib.It of courses, in concrete application, conductive slider 51 can also be set as not contacting the inner wall of shrinkage pool 431, and pass through bullet
Property part 52 realize that the indirect of conductive slider 51 and conductive shroud 4 is conductively connected.
Specifically, mounting base 43 can be the cylinder being convexly equipped in conductive shroud 4 or be that at least two block gaps are convexly equipped in and lead
Plate body in electric cover shell 4, when mounting base 43 is to be made of the plate body that at least two block gaps are convexly equipped in conductive shroud 4, each plate
The inner space being enclosed between body is above-mentioned shrinkage pool 431.Mounting base 43 can be with 4 integrally manufactured molding of conductive shroud；
Alternatively, then mounting base 43 can be also mounted in conductive shroud 4 by mounting base 43 again with 4 separately manufacturing of conductive shroud.
Preferably, the recessed depth of axial direction for defining shrinkage pool 431 is L1, and the axial direction of shrinkage pool 431 is axial consistent with shaft 1,
It is L2 along the axially extending original length of shrinkage pool 431 that elastic component 52, which is defined, under the state that is uncompressed, and defines 51 edge of conductive slider
The axially extending length of shrinkage pool 431 is L3, then has L2+L3 ＞ L1, in this way, stretching out shrinkage pool conducive to ensureing that conductive slider 51 has
Convex dew portion outside 431.
Specifically, shrinkage pool 431 have with its opposite recessed bottom wall that is open, 52 elastic compression of elastic component is in conductive slider 51
Between the recessed bottom wall of shrinkage pool 431, i.e., anti-motor bearings electric corrosion structure provided in this embodiment is conductive after production and assembly
The both ends of sliding block 51 abut elastic component 52 and extension 11 respectively, and elastic component 52 is in compressive state, in this way, conducive to ensureing
After 51 wearing part material of conductive slider, elastic component 52 can release certain span so that the conductive slider 51 after abrasion is protected
It holds and is come into full contact with shaft 1, and then ensure that conductive slider 51 is conductively connected the reliability of shaft 1.
Specifically, conductive shroud 4 and first bearing bracket 3 be fastenedly connected mode have it is following several：Conductive shroud 4 passes through
Interference fit type is set on first bearing bracket 3, i.e., matching between cavity 411 and first bearing bracket 3 is combined into interference and matches
It closes；Alternatively, conductive shroud 4 by weld either rivet or screw connect etc. connection types be fastenedly connected first bearing bracket 3；
Or conductive shroud 4 is set in by interference fit type on first bearing bracket 3, and either riveted by welding or
The connection types such as screw connection are further fastenedly connected first bearing bracket 3.The several ways can all realize conductive shroud 4 and
One bearing bracket 3 is fastenedly connected.
Preferably, elastic component 52 is spring or shrapnel, and spring or shrapnel are preferably made of conductive metallic material, this
Sample can also realize being conductively connected between conductive slider 51 and conductive shroud 4 by the electric action of elastic component 52, to profit
The reliability being conductively connected between raising conductive slider 51 and conductive shroud 4.
Preferably, conductive shroud 4 can be made of the good metal material of electric conductivity, in this way, being both conducive to ensure conductive shield
The electric conductivity of shell 4, and conducive to the mechanical performance of guarantee conductive shroud 4.And the hardness of conductive shroud 4 is preferably greater than conductive slider
51 hardness, wherein the hardness of conductive slider 51 sets smaller, on the one hand can prevent conductive slider 51 from scratching the situation of shaft 1
Occur, is on the other hand conducive to send out harsh noise when preventing conductive slider 51 from rubbing with shaft 1；And the hardness of conductive shroud 4
If must be larger, it be mainly used for preventing conductive shroud 4 from being deformed easily by when external impacts, improves the anti-of conductive shroud 4
Protect performance.
It is highly preferred that conductive slider 51 is made of graphite material, the hardness of graphite material is small, electric conductivity is good, symbol
The design requirement of conductive slider 51 is closed, and conductive slider 51 is made of graphite material, can also dramatically reduce conductive cunning
The manufacturing cost of block 51.
Preferably, the end back to elastic component 52 of conductive slider 51 is in cone tip shape, i.e. conductive slider 51 has cone tip part,
And the top point 511 of cone tip part is resisted against on extension 11, in this way, conducive to the contact reduced between conductive slider 51 and shaft 1
Area to the frictional resistance generated conducive to reduction 51 countershaft 1 of conductive slider, and then is conducive to ensure that shaft 1 rotates smooth
Property, and can be conducive to slow down the rate of wear of cone tip part.
Preferably, the top point 511 of cone tip part extends the center axle position for being resisted against extension 11 along the central axis of shaft 1
Place is set, i.e. the top point 511 of cone tip part and the central axis of shaft 1 is located along the same line.Due to the cental axial position of shaft 1
Place is the position of linear velocity minimum in shaft 1, therefore, it is set as the top point 511 of cone tip part to be resisted against the central shaft of extension 11
At position, it on the one hand can be conducive to slow down the rate of wear of cone tip part, to have longer use conducive to guarantee conductive slider 51
Service life；On the other hand it can be conducive to reduce the frictional resistance that 51 countershaft 1 of conductive slider generates, and then be conducive to ensure that shaft 1 rotates
Smoothness.
Specifically, first bearing bracket 3 be equipped with for the accommodating positioning of first bearing 2 bearing chamber and for extension 11 from
Be pierced by and stretch into the axis hole 310 in conductive shroud 4 in it, the in-profile of bearing chamber with outside the outer coil support of first bearing 2
Exterior feature matching setting, the i.e. radial dimension of bearing chamber and the major diameter fit of 2 outer coil support of first bearing are arranged.Axis hole 310 is specific
Along the setting that axially penetrates through of first bearing bracket 3, the setting of axis hole 310 is mainly used for realizing connecing for conductive slider 51 and shaft 1
Connection is touched, to conducive to realizing being conductively connected for conductive slider 51 and shaft 1.
Preferably, the aperture of 3 upper shaft hole 310 of first bearing bracket is more than the diameter of axle of shaft 1, in this way, shaft 1 can be prevented
The inner wall of outer wall and axis hole 310 contacts with each other so that has larger fit clearance between shaft 1 and axis hole 310, to be conducive to
It prevents from generating mutual frictional force in 1 rotary course of shaft between 310 inner wall of 1 outer wall of shaft and axis hole, and then ensures that shaft 1 rotates
Smooth reliability.
Preferably, as depicted in figs. 1 and 2, above-mentioned anti-motor bearings electric corrosion structure further includes for preventing conductive slider
The powder that 51 abrasions generate falls into the counteraction member 6 in first bearing 2, and counteraction member 6 is set on extension 11.It is conductive
Sliding block 51 is made of graphite material, is being easier to wear and generate powder using process, and due to axis hole 310 and shaft
There is larger fit clearance between 1, therefore, if not taking the cooperation that means prevent powder from falling to axis hole 310 and shaft 1
Place will make the powder that the abrasion of conductive slider 51 generates be fallen to from axis hole 310 in first bearing 2, to be easy to cause
Catching phenomenon occurs for first bearing 2.In the present embodiment, by installing counteraction member 6 on the extension 11 of shaft 1, so as to support
Gear component 6 is kept out between conductive slider 51 and axis hole 310, in this way, can carry out preventing from leading by the effect of keeping out of counteraction member 6
The powder that the abrasion of electric sliding block 51 generates is fallen at axis hole 310, and then effectively prevents the powder that the abrasion of conductive slider 51 generates
The phenomenon fallen to from axis hole 310 in first bearing 2 occurs, it is therefore prevented that the powder that the abrasion of conductive slider 51 generates is to first axle
The rotating property and service life for holding 2 impact.
Preferably, as depicted in figs. 1 and 2, first bearing bracket 3 is further extended outward to be convexly equipped with and be turned over along the edge of axis hole 310
Side structure 32, counteraction member 6 include being convexly equipped in plate with the plate-like body 61 of the suit cooperation of extension 11 and towards first bearing 2
On ontology 61 and the collar flange 62 that is sheathed on outside turnup structure 32, the outer diameter of collar flange 62 are more than the outer of turnup structure 32
Diameter.The center position of plate-like body 61, which runs through, is equipped with perforation, and plate-like body 61 is set in the extension 11 of shaft 1 by perforation
On.On the one hand the setting of plate-like body 61 can be achieved installation of the counteraction member 6 on extension 11 and fix, on the other hand can hinder
The powder that the gear abrasion of conductive slider 51 generates is fallen to along the axial direction of shaft 1 at axis hole 310.The setting of collar flange 62 can hinder
The powder that the gear abrasion of conductive slider 51 generates is fallen to along the radial direction of shaft 1 at axis hole 310.
Preferably, the outer edge of collar flange 62 is concordant with the outer edge of plate-like body 61, in this way, cyclic annular convex can guarantee
Under the premise of edge 62 can be sheathed on outside turnup structure 32, it is conducive to reduce the outer diameter of counteraction member 6, to conducive to reduction counteraction member
6 material cost.
Specifically, as depicted in figs. 1 and 2, first bearing bracket 3 includes bracket body 31 and the projection for having bearing chamber
Above-mentioned turnup structure 32 in 31 side of bracket body, bracket body 31 have the axial direction that counteraction member 6 is axially facing along shaft 1
Side end face 3111, above-mentioned turnup structure 32 are convexly equipped on axial side end face 3111, collar flange 62 and axial side end face 3111
Between with axial spacing H1 (between the end face and axial side end face 3111 near axial side end face 3111 of collar flange 62
Distance), and turnup structure 32 along the axial direction of shaft 1 be convexly equipped in the axially extending height H2 on axial side end face 3111 be more than ring
Axial spacing H1 between shape flange 62 and axial side end face 3111, in this way, penetrating ring-type conducive to ensureing that turnup structure 32 has
The part of 62 inside of flange, to have blocking powder effect well conducive to guarantee collar flange 62.
Preferably, turnup structure 32 is in horn-like, and turnup structure 32 by be open it is gradually increased in a manner of from axis hole 310 from
Extend towards 6 place side of counteraction member, a V-shaped groove 33, the V-arrangement are enclosed between turnup structure 32 and axial side end face 3111
Slot 33 can be used for storing a certain amount of powder, to fall to axis hole 310 along the axial direction of shaft 1 conducive to powder is better protected from
Place.
Specifically, as shown in Figure 1, bracket body 31, which includes, has the sleeve part 311 of bearing chamber and set on sleeve part 311
For the connection edge part 312 being connect with plastic packaging stator assembly 7, turnup structure 32 and connection edge part 312 are located at set
The axial both sides of canister portion 311, and the gabarit radial dimension for connecting edge part 312 is more than the gabarit radial dimension of sleeve part 311.It leads
Electric cover shell 4 includes the body 41 with cavity 411 and the hemmed edges 42 set on 41 open side of body, and body 41 is set in sleeve
Portion 311, hemmed edges 42 fit on connection edge part 312, and the interior wide radial dimension of cavity 411 and sleeve part 311 is outer
Wide radial dimension interference fit setting.
Preferably, the periphery of extension 11 is recessed with a cyclic annular card slot, and the axial both sides of cyclic annular card slot form two shaft shoulders
111, the installation of plate-like body 61 is positioned in cyclic annular card slot.The aperture of perforation shaft part corresponding with cyclic annular card slot in plate-like body 61
Diameter of axle matching setting, and the aperture of perforation is less than the diameter of axle of two shaft shoulders 111 of cyclic annular card slot axial direction both sides, in this way, passing through ring
Two shaft shoulders 111 of shape card slot both sides can not only be conducive to ensure that counteraction member 6 is installed on the solid and reliable property positioned in shaft 1, but also profit
First axle is fallen into fit clearance of the powder that the abrasion of conductive slider 51 prevented generates between plate-like body 61 and shaft 1
It holds on 2, has fully ensured that counteraction member 6 keeps out powder along the axial reliability fallen at axis hole 310 of shaft 1.Specifically, it supports
Rubber material can be used in gear component 6, and either nylon material or PBT material (polybutylene terephthalate (PBT)) are made, these materials
Material makes counteraction member 6 all have certain elastic deformability, to not only be conducive to ensure the sealing performance of counteraction member 6, but also
It can be easily installed on extension 11 conducive to guarantee counteraction member 6.
In the present embodiment, by the way that cyclic annular card slot is arranged in shaft 1, turnup structure 32 is arranged on first bearing bracket 3
With counteraction member 6 coordinate, in this way so that counteraction member 6 can both stop the powder that the abrasion of conductive slider 51 generates well
Axial direction along shaft 1 is fallen at axis hole 310, and can stop the powder of the abrasion generation of conductive slider 51 along shaft 1 well
Radial direction is fallen at axis hole 310, dramatically ensure that counteraction member 6 keeps out the effect of powder.In this way, no matter shaft 1 is
It is horizontally mounted mode, still mounting means (output end 12 of shaft 1 is straight up) straight up, or installed straight down
Mode, or be to tilt mounting means at any angle, counteraction member 6 can all effectively prevent 51 abrasion of conductive slider to generate
Powder is fallen in first bearing 2, applied widely.
Further, as shown in Fig. 2, the embodiment of the present invention additionally provides plastic-sealing brushless DC motor, with above-mentioned
Anti- motor bearings electric corrosion structure.Plastic-sealing brushless DC motor provided in an embodiment of the present invention, as a result of above-mentioned anti-motor
Bearing electric corrosion structure, therefore, it on the one hand ensure that the service life of plastic-sealing brushless DC motor, it is brushless on the other hand to reduce plastic packaging
The manufacturing cost of direct current generator, another further aspect are conducive to expand the use occasion of plastic-sealing brushless DC motor.
Specifically, as shown in Fig. 2, plastic-sealing brushless DC motor provided in an embodiment of the present invention further includes plastic packaging stator assembly
7, rotor assembly 8, second bearing 9, second bearing bracket 100, second bearing bracket 100 specifically can be by conductive metallic material systems
At.Rotor assembly 8 specifically wears the inside for being installed on plastic packaging stator assembly 7, and rotor assembly 8, first bearing 2 and second bearing
9 are all fastened in shaft 1, and rotor assembly 8 is axially located along shaft 1 between first bearing 2 and second bearing 9, and first
Bearing bracket 3 and second bearing bracket 100 are set in outside first bearing 2 and second bearing 9, and second bearing 9 is close to shaft 1
Output end 12 be arranged.
Preferably, plastic-sealing brushless DC motor provided in an embodiment of the present invention further includes being conductively connected in first bearing bracket
Conductive member 200 between 3 and second bearing bracket 100, conductive member 200 can specifically be made of conductive metallic material.It is conductive
The setting of component 200 realizes being conductively connected for first bearing bracket 3 and second bearing bracket 100, and then eliminates first axle
The potential difference between 2 and second bearing 9 is held, effectively preventing first bearing 2 and second bearing 9, there is a phenomenon where galvanic corrosion, ensure
The service life of first bearing 2 and second bearing 9.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
Any modification, equivalent replacement or improvement etc., should all be included in the protection scope of the present invention made by within refreshing and principle.
Claims (9)
1. anti-motor bearings electric corrosion structure, including shaft, it is installed on the first bearing of described shaft one end and is sheathed on described
First bearing bracket outside one bearing, it is characterised in that：It further include the conductive shroud being conductively connected with the first bearing bracket
And the elastic conduction component being conductively connected between the conductive shroud and the shaft, the conductive shroud are sheathed on described
Outside one bearing bracket, the shaft, which has, to be pierced by out of described first bearing bracket and extends into the extension in the conductive shroud
Portion, the elastic conduction component be installed in the conductive shroud and be resiliently attached to the conductive shroud and the extension it
Between；
The elastic conduction component includes conductive slider and is resiliently attached between the conductive slider and the conductive shroud
The end back to the elastic component of elastic component, the conductive slider is resisted against on the extension；
The conductive shroud has the cavity with first bearing bracket suit cooperation, is convexly equipped in the cavity and prolongs with described
The opposite mounting base of extending portion, the mounting base are equipped with shrinkage pool of the opening towards the extension, the opening direction of the shrinkage pool
Opening with the cavity is towards unanimously, and the elastic component and the conductive slider are all installed in the shrinkage pool, the shrinkage pool
Inner wall on be provided with guide chute, be provided on the conductive slider can card insertion in the guide rib in the guide chute,
Alternatively, be provided on the conductive slider on the inner wall of guide chute, the shrinkage pool be provided with can card insertion in the guide chute
Interior guide rib.
2. anti-motor bearings electric corrosion structure as described in claim 1, it is characterised in that：The conductive shroud has and described the
One bearing bracket is set with the cavity of cooperation, and the mounting base opposite with the extension, the mounting base are convexly equipped in the cavity
It is equipped with shrinkage pool of the opening towards the extension, the elastic component and the conductive slider are all installed in the shrinkage pool, and
The conductive slider has that convex to be exposed to the shrinkage pool outer and extend the exposed parts being resisted against on the extension.
3. anti-motor bearings electric corrosion structure as claimed in claim 2, it is characterised in that：The shrinkage pool has to be open relatively with it
Recessed bottom wall, the elastic component elastic compression is between the conductive slider and the recessed bottom wall of the shrinkage pool.
4. anti-motor bearings electric corrosion structure as described in any one of claims 1 to 3, it is characterised in that：The conductive slider it
It is in cone tip shape back to the end of the elastic component, and the top point of the conductive slider is resisted against on the extension.
5. anti-motor bearings electric corrosion structure as claimed in claim 4, it is characterised in that：The top point of the conductive slider is along institute
The central axis for stating shaft extends the center axial position for being resisted against the extension.
6. anti-motor bearings electric corrosion structure as described in any one of claims 1 to 3, it is characterised in that：Further include for preventing
The powder that the conductive slider abrasion generates falls into the counteraction member in the first bearing, and the counteraction member is set in
On the extension.
7. anti-motor bearings electric corrosion structure as claimed in claim 6, it is characterised in that：Run through on the first bearing bracket and sets
There is the axis hole worn for the shaft, and the first bearing bracket further extends outward along the edge of the axis hole and is convexly equipped with flange
Structure, the counteraction member include being convexly equipped in institute with the plate-like body of extension suit cooperation and towards the first bearing
The collar flange stated in plate-like body and be sheathed on outside the turnup structure.
8. anti-motor bearings electric corrosion structure as claimed in claim 7, it is characterised in that：The periphery of the extension is recessed with one
Cyclic annular card slot, the plate-like body installation are positioned in the cyclic annular card slot.
9. plastic-sealing brushless DC motor, it is characterised in that：With the anti-motor bearings electricity of such as claim 1 to 8 any one of them
Arbor.
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| CN201510202229.8A CN104821683B (en) | 2015-04-23 | 2015-04-23 | Anti- motor bearings electric corrosion structure and plastic-sealing brushless DC motor |
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| CN201510202229.8A CN104821683B (en) | 2015-04-23 | 2015-04-23 | Anti- motor bearings electric corrosion structure and plastic-sealing brushless DC motor |
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| CN104821683B true CN104821683B (en) | 2018-07-13 |
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| JP6454292B2 (en) * | 2016-03-15 | 2019-01-16 | 株式会社日立製作所 | Passenger conveyor |
| CN107404198A (en) * | 2017-08-29 | 2017-11-28 | 广东威灵电机制造有限公司 | Motor |
| CN112366877A (en) * | 2019-07-26 | 2021-02-12 | 广东威灵电机制造有限公司 | Motor and electrical equipment comprising same |
| CN112366896B (en) * | 2019-07-26 | 2021-11-30 | 广东威灵电机制造有限公司 | Motor and electrical equipment |
| CN110672884B (en) * | 2019-09-25 | 2021-08-10 | 人本股份有限公司 | Bearing inner race electric conductivity detects complementary unit |
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| CN203984143U (en) * | 2014-06-13 | 2014-12-03 | 刘保义 | The anti-galvanic corrosion of bearing of motor mechanism |
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| JP4656740B2 (en) * | 2001-02-13 | 2011-03-23 | 株式会社鶴見製作所 | Electric corrosion prevention device for underwater rotating machine |
| JP2008099506A (en) * | 2006-10-16 | 2008-04-24 | Matsushita Electric Ind Co Ltd | Induction motor |
| DE102012204795A1 (en) * | 2012-03-26 | 2013-09-26 | Schaeffler Technologies AG & Co. KG | Wheel hub motor with equipotential bonding |
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