CN104821683A - Motor bearing electric corrosion-prevention structure and plastic packaging brushless direct current motor - Google Patents
Motor bearing electric corrosion-prevention structure and plastic packaging brushless direct current motor Download PDFInfo
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- CN104821683A CN104821683A CN201510202229.8A CN201510202229A CN104821683A CN 104821683 A CN104821683 A CN 104821683A CN 201510202229 A CN201510202229 A CN 201510202229A CN 104821683 A CN104821683 A CN 104821683A
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Abstract
The invention belongs to the motor field and discloses a motor bearing electric corrosion-prevention structure and a plastic packaging brushless direct current motor. The motor bearing electric corrosion-prevention structure includes a rotating shaft, a first bearing installed at one end of the rotating shaft, a first bearing supporting frame which sleeves the first bearing, an electric conduction cover which is in electric conduction connection with the first bearing supporting frame, an elastic electric conduction assembly which is electrically connected between the electric conduction cover and the rotating shaft; the electric conduction cover sleeves the first bearing supporting frame; the rotating shaft is provided with an extension portion which extends out from the interior of the first bearing supporting frame and extends into the electric conduction cover; and the elastic electric conduction assembly is installed in the electric conduction cover and is elastically connected between the electric conduction cover and the extension portion. According to the motor bearing electric corrosion-prevention structure of the invention, the electric conduction cover and the elastic electric conduction assembly are adopted, so that electric conduction connection between an inner peripheral support and an outer peripheral support of the first bearing can be realized, and potential difference between the inner peripheral support and the outer peripheral support of the first bearing can be eliminated, and electric corrosion of the first bearing can be avoided, and the first bearing can have the advantages of low manufacture cost, high shock resistance and high load capacity.
Description
Technical field
The invention belongs to machine field, particularly relate to anti-motor bearings electric corrosion structure and there is the plastic-sealing brushless DC motor of this anti-motor bearings electric corrosion structure.
Background technology
In traditional plastic-sealing brushless DC motor, can potential difference be there is due to coil support in bearing and between outer coil support, so, easily make the phenomenon of bearing generation galvanic corrosion, have a strong impact on the useful life of bearing.
In order to prevent the bearing generation galvanic corrosion phenomenon of plastic-sealing brushless DC motor, prior art proposes and adopts the design of ceramic ball bearing (namely rolling ball body adopts ceramic material to make), this design can make to insulate between the interior coil support of bearing and outer coil support, thus can reach the object preventing bearing generation galvanic corrosion phenomenon.But this design has the following disadvantages in a particular application: the requirement of ceramic ball bearing to material and processing technology is higher, thus make the manufacturing cost of ceramic ball bearing higher, be unfavorable for applying on motor; And due to the restriction by ceramic material characteristic, the resistance to impact of ceramic ball bearing and load capacity can be made all poor, so make the application scenario of ceramic ball bearing be very restricted.
Summary of the invention
The object of the invention is to overcome above-mentioned the deficiencies in the prior art, provide anti-motor bearings electric corrosion structure and plastic-sealing brushless DC motor, the low cost of manufacture of its anti-motor bearings electric corrosion structure, and solve the technical problem causing bearing galvano-cautery owing to there is potential difference between bearing inner race support and outer coil support.
For achieving the above object, the technical solution used in the present invention is: anti-motor bearings electric corrosion structure, comprise rotating shaft, be installed on the clutch shaft bearing of described rotating shaft one end, be sheathed on the clutch shaft bearing bracket outside described clutch shaft bearing, conduct electricity the conductive shroud that is connected and conduction with described clutch shaft bearing bracket and be connected to elastic conduction assembly between described conductive shroud and described rotating shaft, described conductive shroud is sheathed on outside described clutch shaft bearing bracket, described rotating shaft has and to pass in described clutch shaft bearing bracket and to extend into the extension in described conductive shroud, described elastic conduction assembly is installed on the interior also elasticity of described conductive shroud and is connected between described conductive shroud and described extension.
Preferably, described elastic conduction assembly comprises conductive slider and elasticity and is connected to elastic component between described conductive slider and described conductive shroud, and the end back to described elastic component of described conductive slider is resisted against on described extension.
Preferably, described conductive shroud has and is set with described clutch shaft bearing bracket the cavity coordinated, the mount pad relative with described extension is convexly equipped with in described cavity, described mount pad is provided with the shrinkage pool of opening towards described extension, described elastic component and described conductive slider are all installed in described shrinkage pool, and described conductive slider has and is convexly exposed to described shrinkage pool and also extends the exposed parts be resisted against on described extension outward.
Preferably, described shrinkage pool has the recessed diapire relative with its opening, and described elastic component elastic compression is between described conductive slider and the recessed diapire of described shrinkage pool.
Preferably, the end back to described elastic component of described conductive slider is cone tip shape, and the top point of described conductive slider is resisted against on described extension.
Preferably, the top point of described conductive slider extends along the central axis of described rotating shaft and is resisted against the center axial position of described extension.
Preferably, above-mentioned anti-motor bearings electric corrosion structure also comprises the counteraction member for preventing the powder that described conductive slider weares and teares generation from dropping on described clutch shaft bearing, and described counteraction member is set on described extension.
Preferably, described clutch shaft bearing bracket runs through the axis hole being provided with and wearing for described rotating shaft, and described clutch shaft bearing bracket also stretches out along the edge of described axis hole and is convexly equipped with turnup structure, described counteraction member comprises the plate-like body that to be set with described extension and to coordinate and to be convexly equipped in described plate-like body and the collar flange be sheathed on outside described turnup structure towards described clutch shaft bearing.
Preferably, the periphery of described extension is arranged with a ring-type draw-in groove, and described plate-like body is installed and is positioned in described ring-type draw-in groove.
Anti-motor bearings electric corrosion structure provided by the invention, clutch shaft bearing bracket is connected by conductive shroud conduction, and connect conductive shroud and rotating shaft by the elastic conduction assembly conduction be installed in conductive shroud, thus clutch shaft bearing bracket can be realized be connected with the conduction of rotating shaft; And due to clutch shaft bearing bracket and the outer coil support of clutch shaft bearing be that conductive contact is connected, rotating shaft is that conductive contact is connected with coil support in clutch shaft bearing, therefore, the setting of conductive shroud and elastic conduction assembly, indirectly achieve coil support in clutch shaft bearing to be connected with the conduction of outer coil support, and then the potential difference eliminated in clutch shaft bearing between coil support and outer coil support, effectively prevent the phenomenon of clutch shaft bearing generation galvanic corrosion, ensure that the useful life of clutch shaft bearing.Because it is undertaken preventing clutch shaft bearing generation galvanic corrosion phenomenon by the setting of conductive shroud and elastic conduction assembly, and it does not need to do insulating Design to the inside of clutch shaft bearing, therefore, make clutch shaft bearing can adopt common metal bearing, like this, be beneficial to and reduce the manufacturing cost of clutch shaft bearing, and be beneficial to and ensure that clutch shaft bearing has good resistance to impact and load capacity.Simultaneously, elastic conduction assembly elasticity is connected between conductive shroud and extension by the present invention, can be beneficial to and ensure, between elastic conduction assembly and conductive shroud, extension, there is good conductive contact performance, and then be beneficial to and fully ensure that elastic conduction assembly conduction connects the reliability of conductive shroud and extension.
Further, present invention also offers plastic-sealing brushless DC motor, it has above-mentioned anti-motor bearings electric corrosion structure.
Plastic-sealing brushless DC motor provided by the invention, owing to have employed above-mentioned anti-motor bearings electric corrosion structure, therefore, ensure that the useful life of plastic-sealing brushless DC motor on the one hand, reduce the manufacturing cost of plastic-sealing brushless DC motor on the other hand, then be beneficial to the use occasion expanding plastic-sealing brushless DC motor on the one hand.
Accompanying drawing explanation
Fig. 1 is the generalized section of the anti-motor bearings electric corrosion structure that the embodiment of the present invention provides;
Fig. 2 is the generalized section of the plastic-sealing brushless DC motor that the embodiment of the present invention provides.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
It should be noted that, when element is called as on " being fixed on " or " being arranged at " another element, it can directly on another element or may there is centering elements simultaneously.When an element is known as " connection " another element, it can be directly connect another element or may there is centering elements simultaneously.
Also it should be noted that, the orientation term such as left and right, upper and lower, the top in following examples, end, is only relative concept or be reference with the normal operating condition of product each other, and should not be regarded as have restrictive.
As depicted in figs. 1 and 2, the anti-motor bearings electric corrosion structure that the embodiment of the present invention provides, comprise rotating shaft 1, be installed on the clutch shaft bearing 2 of rotating shaft 1 one end, be sheathed on the clutch shaft bearing bracket 3 outside clutch shaft bearing 2, the conductive shroud 4 and the elastic conduction assembly 5 be connected between conductive shroud 4 and rotating shaft 1 that conducts electricity that are connected is conducted electricity with clutch shaft bearing bracket 3, conductive shroud 4 is sheathed on outside clutch shaft bearing bracket 3, rotating shaft 1 has and to pass in clutch shaft bearing bracket 3 and to extend into the extension 11 in conductive shroud 4, elastic conduction assembly 5 is installed on the interior also elasticity of conductive shroud 4 and is connected between conductive shroud 4 and extension 11.Clutch shaft bearing bracket 3 specifically can be made up of conductive metallic material.Rotating shaft 1 has the output 12 and non-output that axially oppositely arrange along it, the non-output of rotating shaft 1 is all located at by clutch shaft bearing 2, clutch shaft bearing bracket 3, conductive shroud 4 and elastic conduction assembly 5, namely extension 11 belongs to the non-output of rotating shaft 1, and the end away from extension 11 of rotating shaft 1 is the output 12 of rotating shaft 1.The output 12 of rotating shaft 1 is specially the outside outputting power of motor and treats in order to drive the end that rotating parts (not shown) is rotated.Clutch shaft bearing 2 specifically can be rolling bearing, it comprise to be set with rotating shaft 1 coordinate in coil support and clutch shaft bearing bracket 3 be set with outer coil support, several circumferentially rolling ball bodies between interior coil support and outer coil support spaced apart and being located between interior coil support and outer coil support in order to locate the retainer of each rolling ball body of coordinating.Clutch shaft bearing bracket 3 is specifically sheathed on outside outer coil support, and rotating shaft 1 is arranged in interior coil support.In the present embodiment, the interior coil support of clutch shaft bearing 2, outer coil support, rolling ball body all adopt metal material to make, namely clutch shaft bearing 2 is common metal bearing, its low cost of manufacture, and be beneficial to and ensure that clutch shaft bearing 2 has good resistance to impact and load capacity, thus the applicable situation scope expanding anti-motor bearings electric corrosion structure in the present embodiment can be beneficial to.The anti-motor bearings electric corrosion structure that the embodiment of the present invention provides, structure is simple, low cost of manufacture, it conducts electricity especially by conductive shroud 4 and connects clutch shaft bearing bracket 3, and conduct electricity connect conductive shroud 4 and rotating shaft 1 by being installed on elastic conduction assembly 5 in conductive shroud 4, thus clutch shaft bearing bracket 3 can be realized be connected with the conduction of rotating shaft 1; And due to clutch shaft bearing bracket 3 and the outer coil support of clutch shaft bearing 2 be that conductive contact is connected, rotating shaft 1 is that conductive contact is connected with coil support in clutch shaft bearing 2, therefore, the setting of conductive shroud 4 and elastic conduction assembly 5, indirectly achieve coil support in clutch shaft bearing 2 to be connected with the conduction of outer coil support, and then the potential difference eliminated in clutch shaft bearing 2 between coil support and outer coil support, effectively prevent the phenomenon that galvanic corrosion occurs clutch shaft bearing 2, ensure that the useful life of clutch shaft bearing 2.Because it is undertaken preventing clutch shaft bearing 2 from galvanic corrosion phenomenon occurring by the setting of conductive shroud 4 and elastic conduction assembly 5, and it does not need to do insulating Design to the inside of clutch shaft bearing 2, therefore, make this anti-motor bearings electric corrosion structure have the advantages that structure is simple, cost is low.Simultaneously, elastic conduction assembly 5 elasticity is connected between conductive shroud 4 and extension 11 by the present invention, can be beneficial to and ensure, between elastic conduction assembly 5 and conductive shroud 4, extension 11, there is good conductive contact performance, and then be beneficial to and fully ensure that elastic conduction assembly 5 conducts electricity the reliability connecting conductive shroud 4 and extension 11.
Preferably, as depicted in figs. 1 and 2, elastic conduction assembly 5 comprises conductive slider 51 and elasticity and is connected to elastic component 52 between conductive slider 51 and conductive shroud 4, and the end back to elastic component 52 of conductive slider 51 is resisted against on extension 11.The setting of conductive slider 51, is mainly used in the conduction realized between elastic conduction case 4 with rotating shaft 1 and is connected, and the setting of elastic component 52, elastic conduction assembly 5 can be made to have certain elastic telescopic ability, like this, be beneficial on the one hand and ensure fully contacting of conductive slider 51 and rotating shaft 1, and even if conductive slider 51 has been worn and torn after portion of material still can keep the conductive contact with extension 11 under the resilient force of elastic component 52, fully ensure that the reliability be connected is conducted electricity in conductive slider 51 and rotating shaft 1, it is under guarantee elastic conduction assembly 5 has the prerequisite of excellent conductive performance with rotating shaft 1 on the other hand, the mutual frictional force reducing to produce between elastic conduction assembly 5 and rotating shaft 1 can be beneficial to, thus be beneficial to the smoothness of guarantee rotating shaft 1 rotation and be beneficial to the rate of wear slowing down conductive slider 51.
Particularly, because conductive slider 51 connects conductive shroud 4 and rotating shaft 1 for conducting electricity, therefore conductive slider 51 all should conduct electricity with conductive shroud 4, between conductive slider 51 with rotating shaft 1 and be connected.In the present embodiment, it is directly supporting to contact and realize by conductive slider 51 and extension 11 that conduction between conductive slider 51 with rotating shaft 1 connects, and the conductive connection manner between conductive slider 51 with conductive shroud 4 has following several embodiment: conductive slider 51 is by being connected with the direct direct conduction realized with conductive shroud 4 that contacts of conductive shroud 4; Or conductive slider 51 is also by elastic component 52 conduction connection conductive shroud 4 indirectly; Or, conductive slider 51 also can not only direct conduction connect conductive shroud 4 but also by elastic component 52 indirectly conduction connect conductive shroud 4, this several embodiment all can realize conductive shroud 4 and be connected with the conduction of conductive slider 51.
Preferably, as depicted in figs. 1 and 2, conductive shroud 4 has and is set with clutch shaft bearing bracket 3 cavity 411 coordinated, the mount pad 43 relative with extension 11 is convexly equipped with in cavity 411, mount pad 43 is provided with the shrinkage pool 431 of opening towards extension 11, the opening of shrinkage pool 431 towards with the opening of cavity 411 towards consistent, the inner surface contour of shrinkage pool 431 roughly can be connected to form a U-shaped structure, elastic component 52 and conductive slider 51 are all installed in shrinkage pool 431, and between mount pad 43 and extension 11, there is spacing, conductive slider 51 has convex being exposed to outside shrinkage pool 431 and also extends the exposed parts be resisted against on extension 11, elastic component 52 elastic compression is between the diapire and conductive slider 51 of shrinkage pool 431.Conductive slider 51 realizes contacting with supporting of rotating shaft 1 by the convex mode be exposed to outside shrinkage pool 431, can be beneficial to and prevent from producing between extension 11 and mount pad 43 contacting with each other, thus is beneficial to the rotation generation interference avoiding mount pad 43 countershaft 1.The setting of shrinkage pool 431, can play guide and limit effect to the motion of the elastic telescopic of elastic conduction assembly 5, thus is beneficial to and prevents the distortion of elastic component 52 from stretching, and ensure that the accuracy of the elastic telescopic movement locus of elastic conduction assembly 5.
Preferably, conductive slider 51 directly can contact with the inwall of shrinkage pool 431, thus can realize conductive slider 51 and conduct electricity with the direct contact of conductive shroud 4 and be connected.As further improving embodiment, cooperation between conductive slider 51 with shrinkage pool 431 also can be provided with for preventing conductive slider 51 from the relative structure rotated occurring in shrinkage pool 431, as: can guide chute (not shown) be set on the inwall of shrinkage pool 431, guide runner be arranged and can block the guide rib (not shown) inserted in guide chute; Or, guide chute also can be set on guide runner, the inwall of shrinkage pool 431 be arranged and can block the guide rib inserted in guide chute.Of course, in embody rule, conductive slider 51 also can be set to the inwall not contacting shrinkage pool 431, and realizes conductive slider 51 by elastic component 52 and be connected with the indirect conduction of conductive shroud 4.
Particularly, mount pad 43 can be the cylinder be convexly equipped in conductive shroud 4 or the plate body be convexly equipped in at least two block gaps in conductive shroud 4, when mount pad 43 be made up of at least two block gaps plate body be convexly equipped in conductive shroud 4 time, the inner space enclosing formation between each plate body is above-mentioned shrinkage pool 431.Mount pad 43 can be integrally manufactured shaping with conductive shroud 4; Or, mount pad 43 also can with conductive shroud 4 split manufacture, and then mount pad 43 to be mounted in conductive shroud 4.
Preferably, the recessed degree of depth of axis of definition shrinkage pool 431 is L1, the axis of shrinkage pool 431 and the axial consistent of rotating shaft 1, definition elastic component 52 is L2 along the axially extended original length of shrinkage pool 431 under non-confined state, definition conductive slider 51 is L3 along the axially extended length of shrinkage pool 431, then there is L2+L3 > L1, like this, be beneficial to and ensure that conductive slider 51 has the convex dew portion of stretching out outside shrinkage pool 431.
Particularly, shrinkage pool 431 has the recessed diapire relative with its opening, elastic component 52 elastic compression is between conductive slider 51 and the recessed diapire of shrinkage pool 431, the i.e. anti-motor bearings electric corrosion structure that provides of the present embodiment, after production and assembly, the two ends of conductive slider 51 abut elastic component 52 and extension 11 respectively, and elastic component 52 is in compressive state, like this, be beneficial to and ensure after conductive slider 51 wearing part material, elastic component 52 can discharge certain span and keep and fully the contacting of rotating shaft 1 to make the conductive slider after wearing and tearing 51, and then ensure that conductive slider 51 conducts electricity the reliability of connection rotating shaft 1.
Particularly, conductive shroud 4 has following several with the mode that is fastenedly connected of clutch shaft bearing bracket 3: conductive shroud 4 is set on clutch shaft bearing bracket 3 by interference fit, and coordinating namely between cavity 411 with clutch shaft bearing bracket 3 is interference fit; Or conductive shroud 4 is by welding or rivet or the connected mode such as screw connection being fastenedly connected clutch shaft bearing bracket 3; Or conductive shroud 4 is set on clutch shaft bearing bracket 3 by interference fit, and by welding or rivet or the connected mode such as screw connection being fastenedly connected clutch shaft bearing bracket 3 further.This several mode all can realize being fastenedly connected of conductive shroud 4 and clutch shaft bearing bracket 3.
Preferably, elastic component 52 is spring or shell fragment, and spring or shell fragment preferably adopt conductive metallic material to make, like this, by the electric action of elastic component 52, also the conduction that can realize between conductive slider 51 with conductive shroud 4 is connected, thus is beneficial to raising conductive slider 51 and conducts electricity the reliability be connected between conductive shroud 4.
Preferably, conductive shroud 4 can be made up of the metal material that electric conductivity is good, like this, has both been beneficial to the electric conductivity ensureing conductive shroud 4, and has been beneficial to again the mechanical performance ensureing conductive shroud 4.And the hardness of conductive shroud 4 is preferably greater than the hardness of conductive slider 51, wherein, the hardness of conductive slider 51 is established less, can prevent the situation of conductive slider 51 scratch rotating shaft 1 from occurring on the one hand, is beneficial on the other hand when preventing conductive slider 51 and rotating shaft 1 from rubbing and sends harsh noise; And the hardness of conductive shroud 4 is established larger, be mainly used in deforming easily when preventing conductive shroud 4 to be subject to external impacts, improve the barrier propterty of conductive shroud 4.
More preferably, conductive slider 51 adopts graphite material to make, and the hardness of graphite material is little, electric conductivity good, meets the designing requirement of conductive slider 51, and conductive slider 51 adopts graphite material to make, the manufacturing cost of conductive slider 51 also can be reduced dramatically.
Preferably, the end back to elastic component 52 of conductive slider 51 is cone tip shape, namely conductive slider 51 has cone tip part, and the top point 511 of cone tip part is resisted against on extension 11, like this, be beneficial to the contact area reduced between conductive slider 51 and rotating shaft 1, thus be beneficial to the frictional resistance reducing conductive slider 51 countershaft 1 and produce, and then be beneficial to the smoothness ensureing that rotating shaft 1 rotates, and the rate of wear slowing down cone tip part can be beneficial to.
Preferably, the top point 511 of cone tip part extends along the central axis of rotating shaft 1 center axial position being resisted against extension 11, and namely the top point 511 of cone tip part is located along the same line with the central axis of rotating shaft 1.Center axial position due to rotating shaft 1 is the position that in rotating shaft 1, linear velocity is minimum, therefore, the top point 511 of cone tip part is set to the center axial position being resisted against extension 11, on the one hand can be beneficial to the rate of wear slowing down cone tip part, thus be beneficial to and ensure that conductive slider 51 has longer useful life; The frictional resistance reducing conductive slider 51 countershaft 1 and produce can be beneficial on the other hand, and then be beneficial to the smoothness ensureing that rotating shaft 1 rotates.
Particularly, clutch shaft bearing bracket 3 be provided with for the accommodating location of clutch shaft bearing 2 bearing chamber and for extension 11 from its in pass and stretch into the axis hole 310 in conductive shroud 4, the in-profile of bearing chamber mates with the outer coil support gabarit of clutch shaft bearing 2 and arranges, and namely the radial dimension of bearing chamber and the major diameter fit of the outer coil support of clutch shaft bearing 2 are arranged.Axis hole 310 specifically runs through setting along the axis of clutch shaft bearing bracket 3, the setting of axis hole 310, is mainly used in realizing conductive slider 51 and is connected with the contact of rotating shaft 1, thus is beneficial to and realizes conductive slider 51 and be connected with the conduction of rotating shaft 1.
Preferably, the aperture of clutch shaft bearing bracket 3 upper shaft hole 310 is greater than the diameter of axle of rotating shaft 1, like this, can prevent the inwall of the outer wall of rotating shaft 1 and axis hole 310 from contacting with each other, make, between rotating shaft 1 and axis hole 310, there is larger fit clearance, thus be beneficial to and prevent from producing mutual frictional force between rotating shaft 1 rotary course shaft 1 outer wall and axis hole 310 inwall, and then ensure the smooth and easy reliability that rotating shaft 1 rotates.
Preferably, as depicted in figs. 1 and 2, above-mentioned anti-motor bearings electric corrosion structure also comprises the counteraction member 6 for preventing the powder that conductive slider 51 weares and teares generation from dropping on clutch shaft bearing 2, and counteraction member 6 is set on extension 11.Conductive slider 51 adopts graphite material to make, it is easier to wear and tear at use procedure ratio and produces powder, and owing to having larger fit clearance between axis hole 310 and rotating shaft 1, therefore, if do not take means to prevent powder from dropping to the cooperation place of axis hole 310 and rotating shaft 1, the powder that conductive slider 51 wearing and tearing will be made to produce drops on clutch shaft bearing 2 from axis hole 310, thus easily causes clutch shaft bearing 2 that catching phenomenon occurs.In the present embodiment, by installing counteraction member 6 on the extension 11 of rotating shaft 1, keep out between conductive slider 51 and axis hole 310 to make counteraction member 6, like this, the powder being undertaken preventing conductive slider 51 wearing and tearing from producing by the effect of keeping out of counteraction member 6 drops to axis hole 310 place, and then the phenomenon that the powder that effectively prevent conductive slider 51 wearing and tearing generation drops on clutch shaft bearing 2 from axis hole 310 occurs, the powder preventing conductive slider 51 wearing and tearing to produce impacts the rotating property of clutch shaft bearing 2 and useful life.
Preferably, as depicted in figs. 1 and 2, clutch shaft bearing bracket 3 also stretches out along the edge of axis hole 310 and is convexly equipped with turnup structure 32, counteraction member 6 comprises the plate-like body 61 that to be set with extension 11 and to coordinate and to be convexly equipped in plate-like body 61 and the collar flange 62 be sheathed on outside turnup structure 32 towards clutch shaft bearing 2, and the external diameter of collar flange 62 is greater than the external diameter of turnup structure 32.The center position of plate-like body 61 runs through and is provided with perforation, and plate-like body 61 is set on the extension 11 of rotating shaft 1 by perforation.The setting of plate-like body 61, can realize the installation of counteraction member 6 on extension 11 on the one hand and fix, and can stop that the powder of conductive slider 51 wearing and tearing generation drops to axis hole 310 place along the axis of rotating shaft 1 on the other hand.The setting of collar flange 62, can stop that the powder of conductive slider 51 wearing and tearing generation drops to axis hole 310 place along the radial direction of rotating shaft 1.
Preferably, the outward flange of collar flange 62 is concordant with the outward flange of plate-like body 61, like this, can ensure under the prerequisite that collar flange 62 can be sheathed on outside turnup structure 32, is beneficial to the external diameter reducing counteraction member 6, thus is beneficial to the material cost reducing counteraction member 6.
Particularly, as depicted in figs. 1 and 2, clutch shaft bearing bracket 3 comprises the bracket body 31 with bearing chamber and the above-mentioned turnup structure 32 being convexly equipped in bracket body 31 side, bracket body 31 has along rotating shaft 1 axially towards the axial side end face 3111 of counteraction member 6, above-mentioned turnup structure 32 is convexly equipped on axial side end face 3111, there is between collar flange 62 and axial side end face 3111 axial spacing H1 (distance between the end face near axial side end face 3111 of collar flange 62 and axial side end face 3111), and turnup structure 32 is greater than the axial spacing H1 between collar flange 62 and axial side end face 3111 along the axis axial extended height H2 be convexly equipped on axial side end face 3111 of rotating shaft 1, like this, be beneficial to and ensure that turnup structure 32 has the part penetrated inside collar flange 62, thus be beneficial to ensure collar flange 62 there is good blocks powder effect.
Preferably, turnup structure 32 is in horn-like, and the mode that turnup structure 32 increases gradually with opening extends from axis hole 310 towards side, counteraction member 6 place, formation one V-shaped groove 33 is enclosed between turnup structure 32 and axial side end face 3111, this V-shaped groove 33 can be used for storing a certain amount of powder, thus is beneficial to and prevents powder from dropping to axis hole 310 place along the axis of rotating shaft 1 better.
Particularly, as shown in Figure 1, bracket body 31 comprises the sleeve part 311 with bearing chamber and is located at sleeve part 311 for the fillet edge 312 be connected with plastic packaging stator assembly 7, turnup structure 32 and fillet edge 312 lay respectively at the axial both sides of sleeve part 311, and the gabarit radial dimension of fillet edge 312 is greater than the gabarit radial dimension of sleeve part 311.Conductive shroud 4 comprises the body 41 with cavity 411 and the hemmed edges 42 being located at body 41 open side, body 41 is set in sleeve part 311, hemmed edges 42 fits on fillet edge 312, and the gabarit radial dimension interference fit of the interior wide radial dimension of cavity 411 and sleeve part 311 is arranged.
Preferably, the periphery of extension 11 is arranged with a ring-type draw-in groove, and the axial both sides of ring-type draw-in groove form two shaft shoulders 111, and plate-like body 61 is installed and is positioned in ring-type draw-in groove.In plate-like body 61, the diameter of axle of the shaft part that the aperture of perforation is corresponding with ring-type draw-in groove mates and arranges, and the aperture of perforation is less than the diameter of axle of two shaft shoulders 111 of the axial both sides of ring-type draw-in groove, like this, both can be beneficial to by two shaft shoulders 111 of ring-type draw-in groove both sides and ensure that counteraction member 6 was installed on the solid and reliable property of location in rotating shaft 1, the powder being beneficial to again the conductive slider 51 wearing and tearing generation prevented drops clutch shaft bearing 2 from the fit clearance between plate-like body 61 and rotating shaft 1, fully ensure that counteraction member 6 keeps out powder axially drops to axis hole 310 place reliability along rotating shaft 1.Particularly, counteraction member 6 can adopt elastomeric material or nylon material or PBT material (polybutylene terephthalate (PBT)) to make, these materials make counteraction member 6 all have certain elastic deformability, thus be both beneficial to the sealing property ensureing counteraction member 6, be beneficial to again and ensure that counteraction member 6 can be installed on extension 11 easily.
In the present embodiment, by arranging ring-type draw-in groove in rotating shaft 1, clutch shaft bearing bracket 3 arranges turnup structure 32 carry out coordinating with counteraction member 6, like this, counteraction member 6 both can have been stopped well, and the powder of conductive slider 51 wearing and tearing generation drops to axis hole 310 place along the axis of rotating shaft 1, can stop that again the powder of conductive slider 51 wearing and tearing generation drops to axis hole 310 place along the radial direction of rotating shaft 1 well, ensure that counteraction member 6 keeps out the effect of powder dramatically.Like this, no matter rotating shaft 1 is horizontal mounting means, still mounting means (output 12 of rotating shaft 1 straight up) straight up, or mounting means straight down, or be the mounting means that tilts at any angle, the powder that counteraction member 6 all can effectively prevent conductive slider 51 abrasion from producing drops in clutch shaft bearing 2, and it is applied widely.
Further, as shown in Figure 2, the embodiment of the present invention additionally provides plastic-sealing brushless DC motor, and it has above-mentioned anti-motor bearings electric corrosion structure.The plastic-sealing brushless DC motor that the embodiment of the present invention provides, owing to have employed above-mentioned anti-motor bearings electric corrosion structure, therefore, ensure that the useful life of plastic-sealing brushless DC motor on the one hand, reduce the manufacturing cost of plastic-sealing brushless DC motor on the other hand, then be beneficial to the use occasion expanding plastic-sealing brushless DC motor on the one hand.
Particularly, as shown in Figure 2, the plastic-sealing brushless DC motor that the embodiment of the present invention provides also comprises plastic packaging stator assembly 7, rotor assembly 8, second bearing 9, second bearing bracket 100, second bearing bracket 100 specifically can be made up of conductive metallic material.Rotor assembly 8 specifically wears the inner side being installed on plastic packaging stator assembly 7, and rotor assembly 8, clutch shaft bearing 2 and the second bearing 9 is all fastening is installed in rotating shaft 1, rotor assembly 8 along rotating shaft 1 axially between clutch shaft bearing 2 and the second bearing 9, clutch shaft bearing bracket 3 and the second bearing bracket 100 are set with outside clutch shaft bearing 2 and the second bearing 9, and the second bearing 9 is arranged near the output 12 of rotating shaft 1.
Preferably, the plastic-sealing brushless DC motor that the embodiment of the present invention provides also comprises the conductive member 200 conducting electricity and be connected between clutch shaft bearing bracket 3 and the second bearing bracket 100, and conductive member 200 specifically can be made up of conductive metallic material.The setting of conductive member 200, achieve clutch shaft bearing bracket 3 to be connected with the conduction of the second bearing bracket 100, and then the potential difference eliminated between clutch shaft bearing 2 and the second bearing 9, effectively prevent the phenomenon that galvanic corrosion occurs for clutch shaft bearing 2 and the second bearing 9, ensure that the useful life of clutch shaft bearing 2 and the second bearing 9.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement or improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. anti-motor bearings electric corrosion structure, comprise rotating shaft, the clutch shaft bearing being installed on described rotating shaft one end and the clutch shaft bearing bracket be sheathed on outside described clutch shaft bearing, it is characterized in that: also comprise the conductive shroud that to conduct electricity with described clutch shaft bearing bracket and be connected and conduction and be connected to elastic conduction assembly between described conductive shroud and described rotating shaft, described conductive shroud is sheathed on outside described clutch shaft bearing bracket, described rotating shaft has and to pass in described clutch shaft bearing bracket and to extend into the extension in described conductive shroud, described elastic conduction assembly is installed on the interior also elasticity of described conductive shroud and is connected between described conductive shroud and described extension.
2. anti-motor bearings electric corrosion structure as claimed in claim 1, it is characterized in that: described elastic conduction assembly comprises conductive slider and elasticity and is connected to elastic component between described conductive slider and described conductive shroud, and the end back to described elastic component of described conductive slider is resisted against on described extension.
3. anti-motor bearings electric corrosion structure as claimed in claim 2, it is characterized in that: described conductive shroud has and is set with described clutch shaft bearing bracket the cavity coordinated, the mount pad relative with described extension is convexly equipped with in described cavity, described mount pad is provided with the shrinkage pool of opening towards described extension, described elastic component and described conductive slider are all installed in described shrinkage pool, and described conductive slider has and is convexly exposed to described shrinkage pool and also extends the exposed parts be resisted against on described extension outward.
4. anti-motor bearings electric corrosion structure as claimed in claim 3, it is characterized in that: described shrinkage pool has the recessed diapire relative with its opening, described elastic component elastic compression is between described conductive slider and the recessed diapire of described shrinkage pool.
5. the anti-motor bearings electric corrosion structure as described in any one of claim 2 to 4, is characterized in that: the end back to described elastic component of described conductive slider is cone tip shape, and the top point of described conductive slider is resisted against on described extension.
6. anti-motor bearings electric corrosion structure as claimed in claim 5, is characterized in that: the top point of described conductive slider extends along the central axis of described rotating shaft the center axial position being resisted against described extension.
7. the anti-motor bearings electric corrosion structure as described in any one of claim 2 to 4, it is characterized in that: also comprise the counteraction member for preventing the powder that described conductive slider weares and teares generation from dropping on described clutch shaft bearing, and described counteraction member is set on described extension.
8. anti-motor bearings electric corrosion structure as claimed in claim 7, it is characterized in that: described clutch shaft bearing bracket runs through the axis hole being provided with and wearing for described rotating shaft, and described clutch shaft bearing bracket also stretches out along the edge of described axis hole and is convexly equipped with turnup structure, described counteraction member comprises the plate-like body that to be set with described extension and to coordinate and to be convexly equipped in described plate-like body and the collar flange be sheathed on outside described turnup structure towards described clutch shaft bearing.
9. anti-motor bearings electric corrosion structure as claimed in claim 8, is characterized in that: the periphery of described extension is arranged with a ring-type draw-in groove, and described plate-like body is installed and is positioned in described ring-type draw-in groove.
10. plastic-sealing brushless DC motor, is characterized in that: have the anti-motor bearings electric corrosion structure as described in any one of claim 1 to 9.
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| Application Number | Priority Date | Filing Date | Title |
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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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| CN104821683A true CN104821683A (en) | 2015-08-05 |
| CN104821683B CN104821683B (en) | 2018-07-13 |
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| CN201510202229.8A Active CN104821683B (en) | 2015-04-23 | 2015-04-23 | Anti- motor bearings electric corrosion structure and plastic-sealing brushless DC motor |
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| CN107188014A (en) * | 2016-03-15 | 2017-09-22 | 株式会社日立制作所 | Apparatus of passenger conveyor |
| CN107404198A (en) * | 2017-08-29 | 2017-11-28 | 广东威灵电机制造有限公司 | Motor |
| CN110672884A (en) * | 2019-09-25 | 2020-01-10 | 人本集团有限公司 | Bearing inner race electric conductivity detects complementary unit |
| 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 |
| CN112366896A (en) * | 2019-07-26 | 2021-02-12 | 广东威灵电机制造有限公司 | Motor and electrical equipment |
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| 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 |
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| CN110672884A (en) * | 2019-09-25 | 2020-01-10 | 人本集团有限公司 | Bearing inner race electric conductivity detects complementary unit |
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| Publication number | Publication date |
|---|---|
| CN104821683B (en) | 2018-07-13 |
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