CN2668920Y - Dust-proofing structure for motor bearing - Google Patents
Dust-proofing structure for motor bearing Download PDFInfo
- Publication number
- CN2668920Y CN2668920Y CNU2003201303653U CN200320130365U CN2668920Y CN 2668920 Y CN2668920 Y CN 2668920Y CN U2003201303653 U CNU2003201303653 U CN U2003201303653U CN 200320130365 U CN200320130365 U CN 200320130365U CN 2668920 Y CN2668920 Y CN 2668920Y
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- China
- Prior art keywords
- bearing
- dustproof sheet
- axis hole
- central siphon
- dust
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Abstract
The utility model relates to a dust prevention construction for motor shaft bearing, which comprises an axle tube, a shaft bearing, a rotor, and a dust prevention piece. The axle tube can contain the shaft bearing and the dust prevention piece. The shaft bearing is provided with an axle hole. The rotor is provided with an axle and an axle bed. The axle extends along the axle bed longitudinally and threads through the axle hole of the shaft bearing. The dust prevention piece matches closely with the inner wall of the axle tube, and is provided with an axle hole for the axle to thread through. Because the dust prevention piece provides suitable compensation thickness, the distance between the shaft bearing and the axle bed can be reduced, and the diameter of the axle hole of the dust prevention piece is shorter than the external diameter of the axle bed, so dust can be prevented from accumulating on the shaft bearing.
Description
Technical field
The utility model relates to a kind of dust tight construction of motor bearing, refers in particular to a kind of dustproof sheet that utilizes and prevents the dust tight construction of dirt accumulation in an oil-impregnated bearing.
Background technique
Commonly use the composite construction of motor bearing, as shown in Figure 1, motor is made of a pedestal 10, a stator 20 and a rotor 30, and pedestal 10 is in conjunction with a central siphon 11, and central siphon 11 can be installed with a bearing 12 at least.By this, an axostylus axostyle 31 of rotor 30 can be arranged in an axis hole 120 of bearing 12, makes rotor 30 rotating being combined on the pedestal 10.Usually, the contained lubricant oil (not illustrating among the figure) of bearing 12 can be along with the rotation of axostylus axostyle 31, and the corner cut 121 by the end face periphery of the end face of axis hole 120 inwalls, bearing 12, bearing 12 flows between bearing 12 and the central siphon 11 in regular turn, flows back to bearing 12 inside again.Therefore, the lubricant oil of bearing 12 can produce the surface of circulation and lubricated axis hole 120 voluntarily, with the friction between minimizing axis hole 120 and the axostylus axostyle 31, and then reduces the motor Rotation Noise.Though bearing 12 can reduce the loss of motor sub-assembly, when commonly using the motor real-world operation,,, the lubricant oil that makes bearing 12 overflows outside the central siphon 11 because of splashing easily owing to have excessive gap A between an axle bed 32 of rotor 30 and the bearing 12 when above-mentioned.Simultaneously, dust in air also enters central siphon 11 easily, and falls within the end face of the bearing 12 of tool lubricant oil, and dust further mixes formation greasy dirt 90 with lubricant oil.Because greasy dirt 90 drives by the lubricant oil of bearing 12 end faces, therefore will build up, and cause the lubricant oil can't smooth and easy circulation and enter again between bearing 12 and the central siphon 11 in the position of corner cut 121.As a result, greasy dirt 90 blocks the circulation of lubricant oil, and causes and lack lubricatedly between axis hole 120 and the axostylus axostyle 31, and then causes the rotating speed of rotor 30 to reduce, produces noise and frictional heat, when serious even cause axostylus axostyle 31 stuck, reduces motor working life.
Another commonly uses the composite construction of motor bearing, as U. S. Patent No. 6336745 " the axle combined structure of oil-impregnated bearing and rotor " and No. 6435722 " constructing of oil-impregnated bearing " patent of invention of U. S. Patent in conjunction with improvement, disclose a motor except comprising a pedestal, one stator, one rotor, outside one central siphon and the oil-impregnated bearing, further the end face at oil-impregnated bearing is provided with a ㄇ shape loam cake, and make axostylus axostyle sheathed positioning ring between ㄇ shape loam cake and oil-impregnated bearing, when rotor turns round, ㄇ shape loam cake and positioning ring can be further in order to preventing that fluid from sputtering central siphon, and prevent that dust from entering central siphon.Yet the composite construction of ㄇ shape loam cake, positioning ring, central siphon and oil-impregnated bearing is too complicated, is unfavorable for the assembling operation of motor.The most important thing is that obviously greater than the axle bed external diameter of rotor, so that when reality was used, dust was still easily entered by the axis hole of ㄇ shape loam cake, and lubricant oil is also spilt by the axis hole of ㄇ shape loam cake easily in the axis hole aperture of ㄇ shape loam cake.As a result, because the formation of greasy dirt and the minimizing of lubricant oil, cause to lack lubricatedly between axis hole and the axostylus axostyle, cause rotating speed to reduce equally, produce noise, frictional heat, axostylus axostyle is stuck and reduce problem such as motor working life.Therefore, still be necessary further to improve the dust tight construction of said motor bearing.
In view of this, the utility model is provided with a dustproof sheet for the above-mentioned shortcoming of commonly using structure of improvement above the bearing in a central siphon, and dustproof sheet drive fit shaft tube inner wall also can provide and suitably remedies thickness, with the spacing of an axle bed of a reduction bearing and a rotor.Simultaneously, the preferable external diameter in an axis hole aperture of dustproof sheet less than axle bed.By this, the utility model can utilize dustproof sheet to prevent the dust contact bearing or enter bearing and the gap of central siphon in, and can increase the assembling nargin of single specification bearing by the thickness that remedies of adjusting dustproof sheet.
Summary of the invention
Main purpose of the present utility model is to provide a kind of dust tight construction of motor bearing, above the bearing in a central siphon dustproof sheet is set, dustproof sheet drive fit shaft tube inner wall, and the spacing that suitably remedies a reduced down in thickness bearing and a rotor axle bed is provided, make the utlity model has to prevent to accumulate dust and prolong the motor effect in working life.
Secondary objective of the present utility model is to provide a kind of dust tight construction of motor bearing, above the bearing in a central siphon dustproof sheet is set, adjust the thickness that remedies of dustproof sheet according to the length of bearing, make to the utlity model has the effect that increases bearing assembling nargin.
Another purpose of the present utility model is to provide a kind of dust tight construction of motor bearing, above the bearing in a central siphon dustproof sheet is set, and dustproof sheet forms a ring cutting edge or a roughened surface in addition, makes to the utlity model has the effect that increases oil return efficient.
A purpose more of the present utility model is to provide a kind of dust tight construction of motor bearing, above the bearing in a central siphon dustproof sheet is set, and an axis hole of dustproof sheet extends upward and forms ring flange in, makes to the utlity model has the effect that increases dustproof effect.
The purpose of this utility model realizes by following technological means: a kind of dust tight construction of motor bearing comprises: a central siphon, a bearing and a rotor; Central siphon is a hollow tube; Bearing is located in the central siphon, and bearing is provided with an axis hole; Rotor is provided with an axostylus axostyle and an axle bed, and axostylus axostyle is by the axle bed longitudinal extension, and the axis hole that is arranged in bearing of loose fit; One dustproof sheet tightly fits in the inwall of central siphon, and is arranged at an end of bearing, and dustproof sheet is provided with for the discontiguous axis hole that passes through that wears of axostylus axostyle; The axis hole aperture is less than the external diameter of axle bed.Dustproof sheet provides and suitably remedies thickness, the spacing that makes dustproof sheet can reduce bearing and axle bed, and therefore the axis hole aperture can prevent the dust contact bearing less than the external diameter of axle bed.
The dust tight construction of described motor bearing, the axle bed of rotor cover the end face inner edge of dustproof sheet at least.
The dust tight construction of described motor bearing, the axis hole of dustproof sheet form a ring cutting edge in the bottom.
The dust tight construction of described motor bearing, the axis hole of dustproof sheet extend upward and form ring flange in.
The dust tight construction of described motor bearing, dustproof sheet form a roughened surface in addition in the bottom surface.
The dust tight construction of described motor bearing, the one-body molded inwall that is combined in central siphon of dustproof sheet makes dustproof sheet can accurately be positioned an end of bearing.
Advantage of the present utility model is: 1, above the bearing in central siphon a dustproof sheet is set, dustproof sheet drive fit shaft tube inner wall, and the spacing that suitably remedies reduced down in thickness bearing and rotor axle bed is provided, make it to have and prevent to accumulate dust and prolong the motor effect in working life.2, above the bearing in central siphon dustproof sheet is set, can adjusts the thickness that remedies of dustproof sheet, make it to have the effect that increases bearing assembling nargin according to the length of bearing.3, above the bearing in central siphon dustproof sheet is set, dustproof sheet forms a ring cutting edge or a roughened surface in addition, makes to the utlity model has the effect that increases oil return efficient.4, above the bearing in central siphon dustproof sheet is set, an axis hole of dustproof sheet extends upward and forms ring flange in, makes to the utlity model has the effect that increases dustproof effect.
Description of drawings
Fig. 1: the assembled sectional view of commonly using the composite construction of motor bearing.
Fig. 2: the exploded perspective view of the dust tight construction of the utility model first embodiment's motor bearing.
Fig. 3: the assembled sectional view of the dust tight construction of the utility model first embodiment's motor bearing.
Circle 4: the partial enlarged drawing of the utility model Fig. 3.
Fig. 5: the combination partial enlarged drawing of the dust tight construction of the utility model second embodiment's motor bearing.
Fig. 6: the stereogram of the utility model the 3rd embodiment's dustproof sheet.
Fig. 7: the combination partial enlarged drawing of the dust tight construction of the utility model the 3rd embodiment's motor bearing.
Fig. 8: the stereo rearview of the utility model the 4th embodiment's dustproof sheet.
Fig. 9: the combination partial enlarged drawing of the dust tight construction of the motor bearing of the utility model the 4th real trip example.
Embodiment
In order to allow feature and advantage of the present utility model understand by clearer and more definite quilt, especially exemplified by the utility model preferred embodiment, and conjunction with figs., be described in detail below.
The partial component of the dust tight construction of the utility model motor bearing is same as the structure of commonly using motor bearing of Fig. 1, thereby both same sections employing same reference numbers signs, and structure and function are given unnecessary details no longer in detail.
Please refer to Fig. 2 and shown in Figure 3, the dust tight construction of the utility model first embodiment's motor bearing comprises a central siphon 11, a bearing 12, a dustproof sheet 13 and a rotor 30.Central siphon 11 is a hollow tube, can be fixed in a pedestal 10 and utilize a top flange 111 clips to locate a stator 20.Bearing 12 is selected from and can holds the various self-lubricating bearings that contain lubricant oil, the copper bearing made of powder metallurgy for example, or the ceramic bearing of making through sintering etc.Bearing 12 is located in the central siphon 11, and bearing 12 is provided with an axis hole 120, can be for an axostylus axostyle 31 that wears rotor 30 of loose fit.The end face periphery of bearing 12 forms a corner cut 121 usually.Dustproof sheet 13 can be made by plastics or metal material, is provided with an axis hole 131.
Please refer to Fig. 3 and shown in Figure 4, when pedestal 10, central siphon 11, bearing 12, dustproof sheet 13, top bracing member 14, clasp 15, stator 20 and rotor 30 mutual group are dressed up a motor, dustproof sheet 13 drive fits are positioned in the central siphon 11, and are positioned at an end (for example top) of bearing 12.When rotor 30 runnings, dustproof sheet 13 can provide and suitably remedy thickness d, spacing with reduction bearing 12 and axle bed 32, to form the gap a of dustproof sheet 13 and 32 minimums of axle bed, and the aperture of axis hole 131 is less than the external diameter of axle bed 32, thereby can avoid dust contact bearing 12 or prevent that dust from entering in the gap of central siphon 11 and bearing 12, and make dust 91 be piled up in the end face of dustproof sheet 13.Simultaneously, because the suitable longitudinal length d of axis hole tool of dustproof sheet 13, therefore also can reduce the probability that the lubricant oil of bearing 12 spills.Moreover, even the end face of the bottom surface contact bearing 12 of dustproof sheet 13, reflux by the end face of bearing 12 and the corner cut 121 of periphery because of the lubricant oil of bearing 12 still can utilize the hole of bearing 12 materials own, and enter the gap of bearing 12 and central siphon 11 inwalls, lubricant oil is formed circulate.Therefore, dustproof sheet 13 of the present utility model not only can be avoided dust 91 to gather and form greasy dirt 90 (as shown in Figure 1), and also can prevent that lubricant oil from spilling, reach the circulation that does not influence lubricant oil, so can keep the lubricity of axis hole 120 really, avoiding causing between axis hole 120 and the axostylus axostyle 31 excessive friction, to rotate noise, and then keep the accurate rotating speed of rotor 30, and guarantee motor working life.
Moreover, as Fig. 2 to shown in Figure 4, the remedying thickness and can adjust of dustproof sheet 13 according to the longitudinal length specification of bearing 12.That is, when making the various motor of different axial thicknesss, the utility model can be by the thickness d that remedies of adjusting dustproof sheet 13, make the bearing 12 of single longitudinal length specification be applicable to the various motors of making different axial thicknesss, thereby reduce the die sinking cost of bearing 12 and increase the assembling nargin of single specification bearing 12.
Please refer to shown in Figure 5ly, disclose the dust tight construction of the utility model second embodiment's motor bearing.Compare with first embodiment, second embodiment's dustproof sheet 13 further forms a ring cutting edge 132 in the bottom of axis hole 131.By this, when the axostylus axostyle 31 of rotor 30 rotated, ring cutting edge 132 helped making the lubricant oil tendency that the axis hole 120 by bearing 12 overflows to flow toward the end face of bearing 12 and the corner cut 121 of outer rim, thereby increases the oil return efficient of bearing 12.
Please refer to Figure 6 and Figure 7, disclose the dust tight construction of the utility model the 3rd embodiment's motor bearing.Compare with first embodiment, the 3rd embodiment's dustproof sheet 13 is extended upward by axis hole and forms ring flange 133 in, the thickness d that remedies of dustproof sheet 13 and interior ring flange 133 is suitably adjusted according to the spacing of bearing 12 and axle bed 32, to form the gap a of dustproof sheet 13 and 32 minimums of axle bed.By this, interior ring flange 133 can form obstruct, stopping and to pile up dust 91, so that reduce the probability that dust 91 enters via the axis hole 131 of dustproof sheet 13.Simultaneously, interior ring flange 133 also can splash via axis hole 131 in order to the lubricant oil of avoiding bearing 12 and overflow.
Please refer to Fig. 8 and shown in Figure 9, disclose the dust tight construction of the utility model the 4th embodiment's motor bearing.Because the more smooth unfavorable flow of lubricant in bottom surface of first embodiment's dustproof sheet 13 is to the corner cut 121 of bearing 12 outer rims, therefore the 4th embodiment's dustproof sheet 13 further forms a roughened surface 134 in the bottom surface.By this, when axostylus axostyle 31 rotates, even the end face of roughened surface 134 contact bearings 12 of dustproof sheet 13, roughened surface 134 still can be guided the corner cut 121 that lubricant oil that the axis hole 120 by bearing 12 overflows flows to bearing 12 outer rims smoothly, so, lubricant oil then can enter the gap of bearing 12 and central siphon 11 inwalls and form and circulate, thereby increases the oil return efficient of bearing 12.
As mentioned above, the dust tight construction of commonly using motor bearing compared to Fig. 1 has easy formation greasy dirt 90, greasy dirt 90 hinders lubrication oil circulation and refluxes, and lubricant oil is easy to splash and shortcoming such as overflows, the utility model of Fig. 2 provides by dustproof sheet 13 and suitably remedies thickness d, with the spacing of reduction bearing 12 and axle bed 32, can prevent to gather greasy dirt really, increase oil return efficient, reduce pivoting friction, reduce and rotate noise and prolong motor working life.
Though the utility model has utilized aforementioned preferred embodiment to disclose in detail; so be not in order to limit the utility model; anyly have the knack of this skill; in not breaking away from spirit and scope of the present utility model; when can doing various changes and modification, therefore protection domain of the present utility model defines and is as the criterion when looking claim.
Claims (6)
1, a kind of dust tight construction of motor bearing comprises: a central siphon, a bearing and a rotor; It is characterized in that: central siphon is a hollow tube; Bearing is located in the central siphon, and bearing is provided with an axis hole; Rotor is provided with an axostylus axostyle and an axle bed, and axostylus axostyle is by the axle bed longitudinal extension, and the axis hole that is arranged in bearing of loose fit; One dustproof sheet tightly fits in the inwall of central siphon, and is arranged at an end of bearing, and dustproof sheet is provided with for the discontiguous axis hole that passes through that wears of axostylus axostyle; The axis hole aperture is less than the external diameter of axle bed.
2, the dust tight construction of motor bearing according to claim 1 is characterized in that: the axle bed of rotor covers the end face inner edge of dustproof sheet at least.
3, the dust tight construction of motor bearing according to claim 1 is characterized in that: the axis hole of dustproof sheet forms a ring cutting edge in the bottom.
4, the dust tight construction of motor bearing according to claim 1 is characterized in that: the axis hole of dustproof sheet extends upward and forms ring flange in.
5, according to claim] dust tight construction of described motor bearing, it is characterized in that: dustproof sheet forms a roughened surface in addition in the bottom surface.
6, the dust tight construction of motor bearing according to claim 1 is characterized in that: the one-body molded inwall that is combined in central siphon of dustproof sheet makes dustproof sheet can accurately be positioned an end of bearing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2003201303653U CN2668920Y (en) | 2003-12-25 | 2003-12-25 | Dust-proofing structure for motor bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2003201303653U CN2668920Y (en) | 2003-12-25 | 2003-12-25 | Dust-proofing structure for motor bearing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2668920Y true CN2668920Y (en) | 2005-01-05 |
Family
ID=34439473
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2003201303653U Expired - Lifetime CN2668920Y (en) | 2003-12-25 | 2003-12-25 | Dust-proofing structure for motor bearing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2668920Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101335475B (en) * | 2007-06-29 | 2011-06-22 | 建准电机工业股份有限公司 | Bearing construction of motor |
| CN101615819B (en) * | 2008-06-24 | 2012-05-23 | 建准电机工业股份有限公司 | Motor rotor |
-
2003
- 2003-12-25 CN CNU2003201303653U patent/CN2668920Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101335475B (en) * | 2007-06-29 | 2011-06-22 | 建准电机工业股份有限公司 | Bearing construction of motor |
| CN101615819B (en) * | 2008-06-24 | 2012-05-23 | 建准电机工业股份有限公司 | Motor rotor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20131225 Granted publication date: 20050105 |