CN1424515A - Oil impregnated bearing devices - Google Patents
Oil impregnated bearing devices Download PDFInfo
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- CN1424515A CN1424515A CN02156108A CN02156108A CN1424515A CN 1424515 A CN1424515 A CN 1424515A CN 02156108 A CN02156108 A CN 02156108A CN 02156108 A CN02156108 A CN 02156108A CN 1424515 A CN1424515 A CN 1424515A
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- oil
- bearing
- rupture
- oil film
- impregnated bearing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C17/00—Sliding-contact bearings for exclusively rotary movement
- F16C17/02—Sliding-contact bearings for exclusively rotary movement for radial load only
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/02—Parts of sliding-contact bearings
- F16C33/04—Brasses; Bushes; Linings
- F16C33/06—Sliding surface mainly made of metal
- F16C33/10—Construction relative to lubrication
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/72—Sealings
- F16C33/74—Sealings of sliding-contact bearings
Abstract
On a part of an air vent passage 22 extending from a bearing hole side of an oil retaining bearing member 13 to the outside space in an opening portion side of a bearing holding member 12, an oil film rupturing chamber 21 with passage width A formed so as to block the air vent passage 22 and capable of rupturing an oil film of the lubricating oil is provided. In the oil film rupturing chamber 21, the oil film of the lubricating oil is ruptured to prevent the lubricating oil from flowing out from the opening portion of the bearing holding member 12 to the outside. The oil film defining a bubble D in the lubricating oil is ruptured in the oil film rupturing chamber 21. The invention is to certainly prevent the leakage of a lubricating oil to the outside by a simple structure.
Description
Technical field
The present invention relates to and to lead to the oil-impregnated bearing device of supporting in the shaft component of oil-impregnated bearing member to inserting relatively pivotally.
Background technique
In general, the oil-impregnated bearing device has been widely used in the various device for revolving and driving of motor etc., but in this oil-impregnated bearing device, for example shown in Figure 180, keeping the oil-impregnated bearing member 2 that forms by agglomerated material etc. by private side intercalation shape ground, in the bearing hole of described oil-impregnated bearing member 2, be separated with lubricant oil simultaneously and can insert axis member 3 relatively pivotally and radially support this shaft component 3 at bearing retaining member (bearing support) 1.Again, discoideus thrust bearing plate 4 is installed and forms occlusive part, thus described bearing retaining member 1 is constituted end bag shape at the opening portion of the diagram lower end side that is arranged at described bearing retaining member 1.And, with bearing disk 5 butts that are installed on described thrust bearing plate 4 inner lateral surfaces this shaft component 3 is supported pivotally vertically by making described shaft component 3.
But, shaft component 3 is being inserted when leading in the bearing hole of this oil-impregnated bearing member 2, along with inserting of this shaft component 3 is logical, the interior air of bearing hole that riddles described oil-impregnated bearing member 2 is driven out of the private side of bearing retaining member (bearing support) 1 from the diagram lower end side of oil-impregnated bearing member 2, if remain unchanged, then, the effect of the air driven out of from these oil-impregnated bearing member 2 sides flows out because of may being pushed into the opening portion side with described bearing retaining member 1 interior lubricant oil.For this reason, be on thrust bearing plate 4, to form the path hole 6 that connects shape in the past, be used for and emit to the outer side of bearing retaining member 1 from the air of described oil-impregnated bearing member 2, perhaps be arranged with axially extended groove and carry out exhaust at the inner peripheral surface of the outer circumferential face of described oil-impregnated bearing member 2 and bearing retaining member 1.
Yet, for example shown in Figure 19 when path hole 6 that above-mentioned air discharge usefulness is set and groove, be present in oil-impregnated bearing member 2 lubricant oil on every side and spill the outside by these path holes 6 and groove sometimes.This lubricant oil spills outside phenomenon and also can enlarge because of the bubble that shaft component 3 is inserted temperature variation after logical etc. and take place, and tends to the periphery of bearing means is made dirty.Particularly the amount of lubricant oil is increased owing to injecting an amount of makeup oil to the inside of bearing retaining member 1 in advance, therefore, wanting to realize that above-mentioned shaft component 3 is inserted logical operation and shaft component 3 initially turns round the smoothing of action and wants to realize in the oil-impregnated bearing device of bearing long lifetime that the outside phenomenon that spills of lubricant oil takes place the part of increment easily by above-mentioned makeup oil.
This lubricant oil spill outside phenomenon especially to the demanding device of drive environment detergency for example polygon prism drive unit, hard disk unit etc. become fatefulue pollution cause, also be a great problem for whole device.
For this reason, the object of the present invention is to provide a kind of apparatus structure simple, can prevent well that lubricant oil from spilling outside oil-impregnated bearing device.
Content of the present invention
For achieving the above object, the structure of the oil-impregnated bearing device of the present invention's the 1st technological scheme is, be provided with exhaust passageway, the inner space of the occlusive part side of this exhaust passageway through being formed at the bearing retaining member is communicated in the bearing hole of oil-impregnated bearing member, and extend to the space outerpace of the opening portion side of described bearing retaining member from its interconnecting part, at least a portion setting of described exhaust passageway can disrumpent feelings described lubricant oil the rupture of oil film chamber of duct width A of oil film, in this rupture of oil film chamber, by disrumpent feelings this lubricant oil that makes of the oil film of described lubricant oil is flowed out to the outside from the opening portion of bearing retaining member.
Employing has the oil-impregnated bearing device of the 1st technological scheme of this structure, even enlarge at the bubble of shaft component being inserted in the lubricant oil that the temperature variation that air extruded from the oil-impregnated bearing member or insert because of shaft component when leading in the bearing hole of described oil-impregnated bearing member after logical etc. causes, when this bubble flows into the rupture of oil film chamber, also can be by at the indoor disrumpent feelings bubble collapse that makes of oil film that will divide this bubble of rupture of oil film, the result can prevent well that lubricant oil from spilling the outside.
Again, in the oil-impregnated bearing device of the present invention's the 2nd technological scheme, because the rupture of oil film chamber in above-mentioned the 1st technological scheme is arranged to oil-impregnated bearing member outer circumferential side is trapped among form in the ring-type, therefore, no matter which position around all can be brought into play the disrumpent feelings effect of bubble extremely well.
Again, in the oil-impregnated bearing device of the present invention's the 3rd technological scheme, because the exhaust passageway in above-mentioned the 1st technological scheme only is arranged on side's side of bearing retaining member and oil-impregnated bearing member or is arranged to both sides' member incision, therefore, the degrees of freedom in the time of can guaranteeing to form the rupture of oil film chamber.
Again, because the oil-impregnated bearing device of the present invention's the 4th technological scheme is exactly the inner space of the occlusive part side that is formed at the bearing retaining member in above-mentioned the 1st technological scheme, will and the gap B of the attachment portion of described rupture of oil film chamber and and described oil-impregnated bearing member end face between clearance C be set at duct width A than described rupture of oil film chamber 21 little (B, C＜A), therefore, the capillary force of the inner space of bearing retaining member can be introduced the lubricant oil behind the disrumpent feelings bubble in rupture of oil film chamber the inner space side of bearing retaining member well greater than rupture of oil film chamber side.
Again, in the oil-impregnated bearing device of the present invention's the 5th technological scheme, because oil body is set at below the VG20 (20cst/40 ℃) in above-mentioned the 1st technological scheme, and, the duct width A of rupture of oil film chamber is set in more than the 1mm, therefore, under these conditions, can bring into play the collapse of bubbles effect well.
Again, the manufacture method of the oil-impregnated bearing device of the present invention's the 6th technological scheme is, be provided with exhaust passageway, the inner space of the occlusive part side of this exhaust passageway through being formed at the bearing retaining member is communicated with the bearing hole of oil-impregnated bearing member, and extend to the space outerpace of the opening portion side of described bearing retaining member from its interconnecting part, simultaneously, at least a portion setting of described exhaust passageway can disrumpent feelings lubricant oil the rupture of oil film chamber of duct width A of oil film, to be pressed out to the oil film of lubricant oil of described exhaust passageway side disrumpent feelings by will be present in bubble in the lubricant oil in the inner space that forms on the occlusive part side of described bearing retaining member in this rupture of oil film chamber, and lubricant oil is flowed out to the outside from the opening portion of bearing retaining member.
Promptly, employing has the manufacture method of oil-impregnated bearing device of the 6th technological scheme of this structure, even enlarge at the bubble of shaft component being inserted in the lubricant oil that the temperature variation that from the oil-impregnated bearing member air extruded or insert because of shaft component when leading in the bearing hole of described oil-impregnated bearing member after logical etc. causes, when this bubble flows into the rupture of oil film chamber, also can be by at the indoor disrumpent feelings bubble collapse that makes of oil film of dividing this bubble that makes of rupture of oil film, the result can prevent well that lubricant oil from spilling the outside.
In sum, adopt the oil-impregnated bearing device of technological scheme 1 of the present invention and technological scheme 6 the oil-impregnated bearing device manufacture method at least a portion setting of the exhaust passageway that extends at space outerpace from the bearing hole side of oil-impregnated bearing member to the opening portion side of bearing retaining member can disrumpent feelings lubricant oil the rupture of oil film chamber of duct width A of oil film, in this rupture of oil film chamber by disrumpent feelings this lubricant oil that makes of the oil film of described lubricant oil is flowed out to the outside from the opening portion of bearing retaining member.Even enlarge at the bubble of shaft component being inserted in the lubricant oil that the temperature variation that from oil-impregnated bearing portion air extruded or insert because of shaft component when leading in the bearing hole of described oil-impregnated bearing member after logical etc. causes, also can be disrumpent feelings at the indoor oil film that will divide this bubble of rupture of oil film, therefore, prevent that available simple well-formed lubricant oil from spilling the outside, can obtain the oil-impregnated bearing device of low cost and high reliability.
The simple declaration of accompanying drawing
Fig. 1 drives with the integrally-built longitudinal section of motor explanatory drawing for the polygon prism that expression is suitable for the present invention's one example.
Fig. 2 is the longitudinal section explanatory drawing of the oil-impregnated bearing apparatus structure of expression one embodiment of the invention.
Fig. 3 is the plane explanatory drawing of oil-impregnated bearing device shown in Figure 2.
Fig. 4 is the longitudinal section explanatory drawing of the state of promptly will inserting of the axle in presentation graphs 2 and the oil-impregnated bearing device shown in Figure 3 before logical.
Fig. 5 is the longitudinal section explanatory drawing of just inserting the state after logical of the axle in presentation graphs 2 and the oil-impregnated bearing device shown in Figure 3.
Fig. 6 for inserting of the axle in presentation graphs 2 and the oil-impregnated bearing device shown in Figure 3 logical after the longitudinal section explanatory drawing of the state that breaks of bubble.
The line chart of Fig. 7 for concerning between the duct width A of expression rupture of oil film chamber and the amount by its lubricant oil of guaranteeing.
Fig. 8 is the longitudinal section explanatory drawing of the oil-impregnated bearing apparatus structure of expression another embodiment of the present invention.
Fig. 9 is the plane explanatory drawing of oil-impregnated bearing device shown in Figure 8.
Figure 10 is the longitudinal section explanatory drawing of the oil-impregnated bearing apparatus structure of expression further embodiment of this invention.
Figure 11 is the plane explanatory drawing of oil-impregnated bearing device shown in Figure 10.
Figure 12 is the longitudinal section explanatory drawing of the oil-impregnated bearing apparatus structure of expression further embodiment of this invention.
Figure 13 is the plane explanatory drawing of oil-impregnated bearing device shown in Figure 12.
Figure 14 is the longitudinal section explanatory drawing of the oil-impregnated bearing apparatus structure of expression further embodiment of this invention.
Figure 15 is the plane explanatory drawing of oil-impregnated bearing device shown in Figure 14.
Figure 16 is the longitudinal section explanatory drawing of the oil-impregnated bearing apparatus structure of expression further embodiment of this invention.
Figure 17 is the plane explanatory drawing of oil-impregnated bearing device shown in Figure 16.
Figure 18 is the longitudinal section explanatory drawing of the general oil-impregnated bearing apparatus structure of expression.
Figure 19 is the longitudinal section explanatory drawing of the leakage of oil state of expression oil-impregnated bearing device shown in Figure 180.
Embodiment
Describe embodiments of the invention with reference to the accompanying drawings in detail, at first, the structure example that is applicable to the polygon prism drive unit that smooth deviator of the present invention is used is described.
As shown in Figure 1, partly upright to be provided with the bearing retaining member that roughly is hollow cylindrical be bearing support 12 in the substantial middle of the motor base board 11 of dual-purpose printed base plate, and inserting logical shape at the private side of this bearing support 12, the oil-impregnated bearing member is installed is sintered-metal bearing 13.And the axle 14 that is formed by stainless steel material is separated with lubricant oil and can be radially supported by its sintered-metal bearing 13 with freely rotating.Again, being installed with at the opening portion of the diagram lower end side of described bearing support 12 can be with the thrust bearing plate 15 of described opening portion obturation, axial end (diagram lower end surface) by making described axle 14 be installed on this lip-deep bearing disk 15a butt in thrust bearing plate 15 inboards (diagram upside), should spools 14 support pivotally along thrust direction.The detailed structure of this oil-impregnated bearing device is with aftermentioned.
The stator iron core 16 that the duplexer by electromagnetic steel plate etc. constitutes at the outer circumferential side wall setting-in of described bearing support 12, with respect to the stator coil 16a that reeling respectively of each salient pole portion of this stator iron core 16.Again, the output 14a that protrudes from described sintered-metal bearing 13 side direction diagram upper side at described axle 14 adopts and is pressed into or combination such as shrunk fit is being fixed the revolution maincenter 17 that is formed by aluminum alloy, at the peripheral part of the hub portion 17a of this revolution maincenter 17 the roughly revolving shell 18 of plate shape is installed.
The rotor magnet 19 of ring-type is installed in the inner peripheral surface side of the outer circumferential side wall 18a of described revolving shell 18.The inner peripheral surface of this rotor magnet 19 is with respect to the exterior edge face of each salient pole portion of described stator iron core 16 and be configured to along the contiguous subtend of radial direction.
On the other hand, the heavy wall shape be arranged at the hub portion 17a of described revolution maincenter 17 cores outer circumferential face the deflection polygon prism M of optical information deflection scanning usefulness is installed.The diagram lower end surface of this polygon prism M with protrude the prism mounting 17b of the portion butt that forms from the hub portion 17a of described revolution maincenter 17 to radial direction foreign side side, push fixing by stage clip Ma vertically from the diagram upper side of described hub portion 17a.
At this, as shown in Figures 2 and 3, the bearing support 12 of above-mentioned bearing retaining member is formed by the hollow cylindrical body that end bag shape is arranged that Fig. 2 upper end side has opening portion, and Fig. 2 lower end side of this bearing support 12 utilizes discoideus thrust bearing plate 15 to become occlusive part.As mentioned above, adopt along this bearing retaining member inner circle wall face that is bearing support 12 to be pressed into or combination such as shrunk fit is inserted the sintered-metal bearing 13 that is connected with as the oil-impregnated bearing member, radially roughly be the connectivity slot 20 that crosswise extends from the bearing hole of this sintered-metal bearing 13 towards radial direction foreign side side but be formed with at the axial end of this sintered-metal bearing 13.These access 20 further extend to the outer circumferential face of sintered-metal bearing 13 vertically from the peripheral end of its each access 20, are connected with the access 20 of the end face that is formed at the axial opposed side.
Be provided with exhaust passageway 22 at interior all side wall surfaces of described bearing support 12 by the rupture of oil film chamber 21 of ring-type again.Wherein, rupture of oil film chamber 21 is a kind of ring structurees that are arranged with, the interior all side wall surfaces that form described bearing support 12 are the hollow cylindrical sagged shape, and be arranged to along circumferentially will surrounding shape except the periphery wall the axial two end portions on the described sintered-metal bearing 13, between the periphery wall of interior all side wall surfaces of these bearing support 12 sides and sintered-metal bearing 13, delimit and become to have duct width A.
Again, described exhaust passageway 22 extends to the opening portion side (Fig. 1 upper-end surface side) of described bearing support 12 and opening externally vertically from a position of Fig. 2 upper-end surface of delimiting described rupture of oil film chamber 21, form the roughly cross section shape of round shape in the present embodiment.
Wherein, the duct width A of the rupture of oil film chamber 21 that is made of the annular recess portion of the above-mentioned hollow shape oil film that is set at lubricant oil can not be expanded the size of such degree along these rupture of oil film chamber 21 walls.Promptly, in described rupture of oil film chamber 21, even bubble is invaded from sintered-metal bearing 13 with lubricant oil, the oil film that to delimit the lubricant oil of this bubble because of the big I of duct width A can be disrumpent feelings, so the bubble that also can will flow into immediately in this rupture of oil film chamber 21 in rupture of oil film chamber 21 is disrumpent feelings, not can because of oil film with obturation in the path.Like this, can be only in the downstream side of its rupture of oil film chamber 21 (Fig. 2 upper side) with bubble the air after disrumpent feelings emit, can not produce by the effect that pushes away lubricant oil on the bubble, can prevent that lubricant oil from flowing out to the outside from the opening portion of Fig. 2 upper end side of being arranged at bearing support 12.In addition, in the present embodiment, described oil body is set at below the VG20 (20cst/40 ℃), and the duct width A with above-mentioned rupture of oil film chamber 21 is set in more than the 1mm simultaneously.
And, the internal space S of delimiting in the occlusive part of the connectivity slot 20 of described rupture of oil film chamber 21 by described sintered-metal bearing 13 and Fig. 2 lower end side of described bearing support 12 is connected, and will be set at the little (B＜A) of duct width A than described rupture of oil film chamber 21 with the gap B that formed by connectivity slot 20 in the attachment portion of this rupture of oil film chamber 21.Delimit clearance C between the end face of diagram lower end side of the inner surface of described thrust bearing plate 15 of described internal space S and described sintered-metal bearing 13 and also be set at the little (C＜A) of duct width A than described rupture of oil film chamber 21 again.
Below, in the oil-impregnated bearing device of present embodiment with this structure, axle 14 inserted the operations of leading in the bearing hole of sintered-metal bearing 13 describe.
At first, as shown in Figure 4, be lubricated the repairing operation of oil (viscosity: below the VG20) to the internal space S of the occlusive part side (diagram lower end side) of described bearing support 12.Around the diagram end portion of described sintered-metal bearing 13, fill with lubricant oil in advance.
Under this state, in case axle 14 is led in the bearing hole of sintered-metal bearing 13 from the diagram upper side is slotting, then along with this slotting logical entering of 14, as shown in Figure 5, constantly extrude lubricant oil and air from the diagram lower end side of sintered-metal bearing 13, the air that wherein is forced out becomes bubble D, and with the lubricant oil around the sintered-metal bearing 13 by on be pushed into the diagram upper side state move.This bubble D is not limited to axle 14 is inserted the occasions of leading in the bearing hole of sintered-metal bearing 13, occurs in too because of axle 14 and inserts the occasion that the bubble in the lubricant oil that temperature variation after logical etc. causes enlarges.
Yet in the present embodiment, when above-mentioned bubble D flowed into rupture of oil film chamber 21, the oil film that forms this bubble can not keep in rupture of oil film chamber 21 and disrumpent feelings, and bubble D disappears.The result is as shown in Figure 6, air after having only above-mentioned bubble D disrumpent feelings is constantly discharged to the outside from the opening portion of Fig. 2 upper end side of being arranged at bearing support 12 from described rupture of oil film chamber 21 by exhaust passageway 22, lubricant oil has lost the pushing effect by described bubble D, shown in the arrow among the figure, constantly flow down to original diagram lower position.Thus, can reduce the amount that lubricant oil flows out to the outside from the opening portion of Fig. 2 upper end side of being arranged at bearing support 12 significantly.
For example, in Fig. 7, axle 14 is inserted when leading in the bearing hole of sintered-metal bearing 13, when injecting the lubricant oil of fully measuring around the described sintered-metal bearing 13, the amount of having filled with lubricant oil fully with respect to the space segment beyond the rupture of oil film chamber 21 becomes the residual capacity of lubricant oil of remainder for (longitudinal axis of Fig. 4: the amount of measuring μ l), the residual capacity of this lubricant oil is with respect to the duct width A (transverse axis: mm) perhaps have certain variation of described rupture of oil film chamber 21 to not overflowing the residual capacity of guaranteeing at the lubricant oil of private side from bearing support 12.From this figure as can be seen, at the duct width A of described rupture of oil film chamber 21 during less than 1mm, the residual capacity of lubricant oil is 0, compare with the amount of filling with of lubricant oil and to spill the outside on a small quantity, but when the duct width A of rupture of oil film chamber 21 is in more than the 1mm particularly the 1.3mm left and right sides, the residual capacity of lubricant oil is for being in a ratio of about a spot of 5 μ l with the amount of filling with of lubricant oil, also can fully guarantee even be in a ratio of many amounts with the amount of filling with of lubricant oil.
In the oil-impregnated bearing device of present embodiment,, therefore no matter all can carry out the disrumpent feelings of bubble well at circumferential which position because form that the peripheral part ring-type as the sintered-metal bearing 13 of oil-impregnated bearing member is surrounded is arranged in rupture of oil film chamber 21 again.
On the other hand, the above embodiments are that ring-type is arranged in rupture of oil film chamber 21, but be that rupture of oil film chamber 21 is set to exhaust passageway 22 parts integratedly in following embodiment, exhaust passageway 22 is used for rupture of oil film chamber 21 and constitutes and is included in the one portion.
At first, in Fig. 8 and embodiment shown in Figure 9, interior all side wall surfaces at bearing support 12 are provided with the holding part 12a that protrudes in the form of a ring towards central side, and this holding part 12a keeps sintered-metal bearing 13 by the crimping with the periphery wall of described sintered-metal bearing 13.And the part beyond the described holding part 12a on the inner circle wall face of described bearing support 12 is separated with the outer circumferential side wall of sintered-metal bearing 13, has formed the rupture of oil film chamber 21 with the duct width A that comprises this separate section.
And, interior all side wall surfaces with respect to described bearing support 12, the duct width of the exhaust passageway 22 that is wholely set with described rupture of oil film chamber 21 also with the same formation of above-mentioned duct width A, the duct width A of this exhaust passageway 22 sets such size of the oil film expansion that can not make lubricant oil in this exhaust passageway 22 for.Adopt this embodiment, can on the basis of the foregoing description effect and effect, form rupture of oil film chamber 21 easily, are circumferential parts because of rupture of oil film chamber 21 simultaneously, so the lubricated oil of gap 12b of interior all sides of bearing support 12 in addition and sintered-metal bearing 13 outer circumferential sides is filled with.Like this, even along with lubricant oil moving vertically taken place for the revolution of axle 14, lubricant oil also can be supplied with by the circulation that described gap 12b be lubricated oil, so can increase the service life.
Again, in Figure 10 and embodiment shown in Figure 11, rupture of oil film chamber 21 among above-mentioned Fig. 8 and the embodiment shown in Figure 9 is included in 2 bodies stretch out on the position that exhaust passageway 22 in the part is provided in the radial direction opposition side, can obtains effect and the effect same with the foregoing description.
Again, in Figure 12 and embodiment shown in Figure 13, the cross section shape that rupture of oil film chamber 21 among above-mentioned Fig. 8 and the embodiment shown in Figure 9 is included in the exhaust passageway 22 in the part roughly is a pentagon, and this embodiment also can obtain effect and the effect same with the foregoing description.
Again, in Figure 14 and embodiment shown in Figure 15, rupture of oil film chamber 21 among above-mentioned Fig. 8 and the embodiment shown in Figure 9 is included in exhaust passageway 22 oblique stretching out in the part, the form that formation is tilted to axial from rupture of oil film chamber 21, this embodiment also can obtain effect and the effect same with the foregoing description.
Again, in Figure 16 and embodiment shown in Figure 17, the exhaust passageway 22 that comprises rupture of oil film chamber 21 is formed at the outer circumferential face side of sintered-metal bearing 13, can obtain effect and the effect same with the foregoing description.
More than to having done to specify by inventor's inventive embodiment, but the present invention is not limited to the foregoing description, can do various changes without departing from the spirit and scope of the present invention.
For example, split shape and be among sintered-metal bearing 13 and bearing support 12 both sides and make both divide rupture of oil film chamber 21 or exhaust passageway 22 by in advance each above-mentioned embodiment rupture of oil film chamber 21 or exhaust passageway 22 being formed, also can obtain effect and the effect same with the foregoing description along the radial direction zoarium.
Claims (6)
1. oil-impregnated bearing device comprises: one distolaterally is provided with opening portion and at another distolateral bearing retaining member that end bag shape is arranged that is provided with occlusive part; Oil-impregnated bearing member along the inner circle wall face intercalation of this bearing retaining member; And in the bearing hole of described oil-impregnated bearing member, be separated with lubricant oil and can insert logical shaft component relatively pivotally, it is characterized in that,
Be provided with exhaust passageway, the inner space of the occlusive part side of this exhaust passageway through being formed at described bearing retaining member is communicated in the bearing hole of described oil-impregnated bearing member, and extends to the space outerpace of the opening portion side of described bearing retaining member from its interconnecting part,
At least a portion setting of described exhaust passageway can disrumpent feelings described lubricant oil the rupture of oil film chamber of duct width A of oil film, in this rupture of oil film chamber, by described lubricant oil is flowed out with the oil film of described lubricant oil is disrumpent feelings to the outside from the opening portion of described bearing retaining member.
2. oil-impregnated bearing device as claimed in claim 1 is characterized in that, described rupture of oil film chamber is arranged to described oil-impregnated bearing member outer circumferential side is trapped among form in the ring-type.
3. oil-impregnated bearing device as claimed in claim 1 is characterized in that, described exhaust passageway only is arranged on side's side of bearing retaining member and oil-impregnated bearing member or the form setting of cutting with both sides' member.
4. oil-impregnated bearing device as claimed in claim 1, it is characterized in that, be formed at described bearing retaining member the occlusive part side the inner space for will and the attachment portion of described rupture of oil film chamber in gap B and and described oil-impregnated bearing member end face between clearance C be set at duct width A than described rupture of oil film chamber 21 little (B, C＜A).
5. oil-impregnated bearing device as claimed in claim 1 is characterized in that, described oil body is set at below the VG20 (20cst/40 ℃), and,
The duct width A of described rupture of oil film chamber is set in more than the 1mm.
6. the manufacture method of an oil-impregnated bearing device, distolaterally be provided with opening portion and along one at another distolateral inner circle wall face that is provided with the bearing retaining member that end bag shape is arranged of occlusive part, after with the intercalation of oil-impregnated bearing member, in the bearing hole of described oil-impregnated bearing member, can insert shaft component logical relatively pivotally by lubricant oil, it is characterized in that
Be provided with exhaust passageway, the inner space of the occlusive part side of this exhaust passageway by being formed at described bearing retaining member is communicated with the bearing hole of described oil-impregnated bearing member, extend to the space outerpace of the opening portion side of described bearing retaining member from its interconnecting part, simultaneously, at least a portion setting of this exhaust passageway can disrumpent feelings lubricant oil the rupture of oil film chamber of duct width A of oil film, to be pressed out to the oil film of lubricant oil of described exhaust passageway side disrumpent feelings by will be present in bubble in the lubricant oil in the inner space that forms on the occlusive part side of described bearing retaining member in described rupture of oil film chamber, and lubricant oil is flowed out to the outside from the opening portion of described bearing retaining member.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001372324 | 2001-12-06 | ||
| JP2001372324A JP2003172357A (en) | 2001-12-06 | 2001-12-06 | Oil retaining bearing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1424515A true CN1424515A (en) | 2003-06-18 |
Family
ID=19181240
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN02156108A Pending CN1424515A (en) | 2001-12-06 | 2002-12-04 | Oil impregnated bearing devices |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP2003172357A (en) |
| KR (1) | KR100518913B1 (en) |
| CN (1) | CN1424515A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103503284A (en) * | 2011-05-04 | 2014-01-08 | Bsh博世和西门子家用电器有限公司 | Axial bearing for an electric drive |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005248987A (en) * | 2004-03-01 | 2005-09-15 | Denso Corp | Bearing support device |
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| JPS6335148A (en) * | 1986-07-30 | 1988-02-15 | Toshiba Corp | Bearing apparatus of rotary electric machine for rolling stock |
| JP2903664B2 (en) * | 1990-07-17 | 1999-06-07 | 松下電器産業株式会社 | Motor bearing device |
| JP3558768B2 (en) * | 1995-12-26 | 2004-08-25 | 日本電産株式会社 | Motor with hydrodynamic bearing |
| JPH11294457A (en) * | 1998-04-10 | 1999-10-26 | Pooraito Kk | Bearing unit for spindle motor |
| JP4446506B2 (en) * | 1999-02-10 | 2010-04-07 | パナソニック株式会社 | Fluid bearing mechanism and motor equipped with the fluid bearing mechanism |
-
2001
- 2001-12-06 JP JP2001372324A patent/JP2003172357A/en active Pending
-
2002
- 2002-11-28 KR KR10-2002-0074559A patent/KR100518913B1/en not_active IP Right Cessation
- 2002-12-04 CN CN02156108A patent/CN1424515A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103503284A (en) * | 2011-05-04 | 2014-01-08 | Bsh博世和西门子家用电器有限公司 | Axial bearing for an electric drive |
| US9702370B2 (en) | 2011-05-04 | 2017-07-11 | Bsh Hausgeraete Gmbh | Axial bearing for an electric drive |
Also Published As
| Publication number | Publication date |
|---|---|
| KR100518913B1 (en) | 2005-10-06 |
| JP2003172357A (en) | 2003-06-20 |
| KR20030047737A (en) | 2003-06-18 |
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