CN102187106B - Rolling bearing and rotation axis support structure - Google Patents
Rolling bearing and rotation axis support structure Download PDFInfo
- Publication number
- CN102187106B CN102187106B CN200980141598.3A CN200980141598A CN102187106B CN 102187106 B CN102187106 B CN 102187106B CN 200980141598 A CN200980141598 A CN 200980141598A CN 102187106 B CN102187106 B CN 102187106B
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- China
- Prior art keywords
- ring
- outer ring
- rolling bearing
- resin back
- normal temperature
- Prior art date
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Classifications
-
- 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
- F16C33/30—Parts of ball or roller bearings
- F16C33/58—Raceways; Race rings
- F16C33/60—Raceways; Race rings divided or split, e.g. comprising two juxtaposed rings
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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
- F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
- F16C35/04—Rigid support of bearing units; Housings, e.g. caps, covers in the case of ball or roller bearings
- F16C35/06—Mounting or dismounting of ball or roller bearings; Fixing them onto shaft or in housing
- F16C35/07—Fixing them on the shaft or housing with interposition of an element
- F16C35/077—Fixing them on the shaft or housing with interposition of an element between housing and outer race ring
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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
- F16C43/00—Assembling bearings
- F16C43/04—Assembling rolling-contact bearings
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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
- F16C19/00—Bearings with rolling contact, for exclusively rotary movement
- F16C19/22—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings
- F16C19/44—Needle bearings
- F16C19/46—Needle bearings with one row or needles
- F16C19/466—Needle bearings with one row or needles comprising needle rollers and an outer ring, i.e. subunit without inner ring
Abstract
The present invention relates to a kind of rolling bearing (21), it possesses: multiple segmentation outer collar members (25a, 25b) circumferentially configured and the outer ring formed; Multiple rollers (23) that the roller surface of outer ring rolls; Be formed as the shape cut off at a position of the circumference of ring-shaped member, be configured to contact with outer ring at the outside diameter of outer ring, and to the resin back-up ring (11a) that the movement of the radial direction of multiple segmentation outer collar members (25a, 25b) limits.
Description
Technical field
The present invention relates to rolling bearing and rotation axis support structure, especially relate to the rolling bearing and rotation axis support structure that use under the environment that temperature variation is large.
Background technique
Although the needle bearing projected bearing area be made up of outer ring, needle rollers and retainer is little, the load of high loading can be born, and be high rigidity.Therefore, playing this kind of characteristic, effectively utilizing the bearing as supporting the bent axle of Vehicle component, especially motor car engine.The bearing of the motor of Motor Vehicle from during cooling near-30 DEG C until driving near 150 DEG C time, use under the temperature environment of wide cut.
When being loaded to bent axle by the needle bearing of crankshaft support, balancer weight etc. interfere with needle bearing, are therefore difficult to from axial loading.Therefore, the bearing after preferably each structure member circumferentially being split.This kind of bearing owing to configuring from the outside diameter of bent axle and load each structure member, therefore, it is possible to avoid when loading with the interference of balancer weight etc.It should be noted that, this kind of bearing is open in No. 1920148th, U. S. Patent (patent documentation 1).
At this, about bearing outer ring being divided into two-part form, when loading or when driving, each parting plane splitting outer collar members involutory likely misplaces.Therefore, in the technology disclosed in Japanese Unexamined Patent Publication 6-81846 publication (patent documentation 2), the annular slot of the outer diameter face across two segmentation outer rings is set, makes circlip chimeric with it, and prevent the dislocation of parting plane.And, disclose a kind of on the basis of structure being provided with above-mentioned annular slot and circlip in Japanese Unexamined Patent Publication 6-109025 publication (patent documentation 3), possess combination that the gap for the radial direction to the outer ring produced during thermal expansion and housing compensates and to hold concurrently the technology of temperature compensation band.
In addition, above-mentioned bearing, when roller rolls in load territory, can produce noise, vibration.When especially splitting outer ring etc., this kind of problem shows significantly.Relative to this kind of problem, in the technology disclosed in Japanese Unexamined Patent Publication 6-229415 publication (patent documentation 4), between outer ring and cylinder block, be provided with oil film forming portion, form oil film thus and absorb noise, vibration.
At this, the formation for the crankshaft supporting structure in the past of supporting crankshaft is described.Figure 10 is the figure observing crankshaft supporting structure in the past from the spin axis direction of bent axle.Figure 11 is by the sectional view during crankshaft supporting structure shown in the IX-IX PMPQ Figure 10 in Figure 10 a part of.It should be noted that, the spin axis direction of bent axle becomes paper table back of the body direction.And calm intelligible viewpoint is set out, Figure 10 represents the state after a part for crankshaft supporting structure being decomposed.
With reference to Figure 10 and Figure 11, crankshaft supporting structure 101 comprises bent axle 102, the rolling bearing 103 that supports bent axle 102, the engine block 104 of installing rolling bearing 103.Rolling bearing 103 possesses outer ring 106, multiple roller 107, keeps the retainer 108 of multiple roller.Outer ring 106 can be divided into two to split outer collar members 109a, 109b.About retainer 108, two segmentation retainer parts 110a, 110b also can be divided into.Engine block 104 can be divided into two to split engine block parts 105a, 105b.Fastening by utilizing bolt (not shown) engine block parts 105a, 105b will be split across rolling bearing 103, and rolling bearing 103 is arranged on engine block 104.
Between bent axle 102 and roller 107, be provided with radial gap, that is, be provided with by the size X in Figure 11
1the radial clearance represented.By suitably guaranteeing the size of this radial clearance, and the rolling etc. that roller 107 can be made smoothing.And, in engine block 104, be provided with magnitude of interference Y
1, thus, interference fit is carried out to rolling bearing 103, and prevents the creep of outer ring 106.It should be noted that, in this accompanying drawing and following accompanying drawing, calm intelligible viewpoint is set out, and has carried out enlarged icon for radial clearance and magnitude of interference.
About the raw material of engine block 104, from viewpoints such as lightweights, usually use aluminum alloy.On the other hand, about the raw material of the outer ring 106 of bent axle 102 or rolling bearing 103, from guaranteeing the viewpoints such as rigidity, use steel.
Patent documentation 1: No. 1920148th, U. S. Patent
Patent documentation 2: Japanese Unexamined Patent Publication 6-81846 publication
Patent documentation 3: Japanese Unexamined Patent Publication 6-109025 publication
Patent documentation 4: Japanese Unexamined Patent Publication 6-229415 publication
The rolling bearing 103 of said structure, from the view point of the facilitation of loading property, is split outer ring, therefore needs the separation preventing each outer collar members loaded.In the technology of patent documentation 2 and patent documentation 3, need to arrange the annular slot across two outer collar members, processing difficulties.Like this, high cost is formed and producibility is deteriorated.
In addition, the crankshaft supporting structure 101 of said structure uses under the various environment such as hot environment, low temperature environment.In this case, the thermal expansion coefficient forming each structure member of crankshaft supporting structure 101 is different, therefore likely suitably cannot guarantee the size X of radial clearance
1and magnitude of interference Y
1.
This kind of situation is described in detail.Figure 12 represents hot environment, specifically, is the sectional view of a part for the crankshaft supporting structure 101 represented near 150 DEG C, is the part corresponding to Figure 11.Figure 13 represents low temperature environment, specifically, is the sectional view of a part for the crankshaft supporting structure 101 represented near-30 DEG C, is the part corresponding to Figure 11.It should be noted that, Figure 11 represents normal temperature environment, specifically, is the sectional view of a part for the crankshaft supporting structure 101 represented near 20 DEG C.
With reference to Figure 10 ~ Figure 13, the raw material of engine block 104 and the thermal expansion coefficient of aluminum alloy are greater than the raw material of bent axle 102 and outer ring 106 and the thermal expansion coefficient of steel.Therefore, in high temperature environments, the pattern of wants is the magnitude of interference Y that can guarantee appropriate amount
2.But, when so forming, under normal temperature environment and low temperature environment, magnitude of interference Y
1, Y
3excessive, loading property is deteriorated.And, the size X of the radial clearance under low temperature environment
3also likely become negative.Under this situation, be not only difficult to the engine start making to comprise crankshaft supporting structure 101, and likely can cause sintering or gnaw cutting.In addition, the size X of the radial clearance under each environment
1, X
2, X
3variable quantity large time, the stable rotation of bent axle 102 cannot be obtained, and the whirling etc. of bent axle 102 occurs, thus produce noise, vibration.
At this, according to patent documentation 4, by the oil film formed by oil sealing, noise, the vibration of rolling bearing 103 reduce.But, oil sealing due to be exposed to high temperature for a long time engine oil under and sealing is likely impaired.Like this, noise, vibration cannot be reduced.
Summary of the invention
The object of the present invention is to provide a kind of producibility and loading property good, noise, vibration can be reduced, and sintering can be reduced, gnaw the rolling bearing cut.
Another object of the present invention is to provide a kind of producibility of bearing and loading property good, noise, vibration can be reduced, and sintering can be reduced, gnaw the rotation axis support structure cut.
Rolling bearing of the present invention possesses: circumferentially configured by multiple segmentation outer collar members and the outer ring formed; Multiple rollers that the roller surface of outer ring rolls; In order to form the shape that gap is formed as a position of the circumference of ring-shaped member to cut off, be configured to contact with outer ring at the outside diameter of outer ring, and to the resin back-up ring that the movement of the radial direction of multiple segmentation outer collar members limits.
By formation like this, split outer collar members from the outside diameter configuration of running shaft and form outer ring, make the resin back-up ring generation resiliently deformable in order to form the shape that a position of the circumference of ring-shaped member cuts off by gap and configure from outside diameter, thus can rolling bearing be loaded.So, loading can be made good.In this case, can resin back-up ring be passed through, the movement of the radial direction of restriction segmentation outer collar members, and prevent the separation of outer ring.So, special processing need not be applied to outer ring, and resin back-up ring is simple shape, therefore, it is possible to make producibility good.And, even if under rolling bearing is configured in hot environment and low temperature environment, also can adjusts the size of the radial direction of resinous resin back-up ring, and suitably guarantee radial clearance or magnitude of interference.So, the creep of outer ring or sintering can be prevented, gnaw and cut.And, the whirling of running shaft can be prevented, and reduce noise, vibration.In addition, noise, vibration can be absorbed by resin back-up ring, therefore, it is possible to reduce noise, vibration.Therefore, this kind of rolling bearing can make loading and producibility well, reduce noise, vibration, and minimizing sinters, gnaws and cut.
Preferably, under normal temperature state, when the outside diameter in outer ring configures resin back-up ring, the outside dimension of resin back-up ring is greater than the outside dimension of outer ring.So, under normal temperature state, sandwiched resin back-up ring between the housing that can configure at the outside diameter of outer ring and outer ring etc., thus the creep of outer ring when rotating can be prevented and reduce noise, vibration further.
More preferably, under normal temperature state, the length of the circumference in gap is D
1and the external diameter of outer ring is D
2time, there is 0 < D
1≤ 0.4D
2relation.So, the separation etc. of outer ring can be prevented more reliably.
As a preferred mode of execution, the cross section of resin back-up ring when being cut off by resin back-up ring along the direction vertical with spin axis is substantially C-shaped.
As a preferred mode of execution, cross section when circumferentially being cut off by resin back-up ring is rectangular shape.
More preferably, resin back-up ring arranges multiple vertically.So, the separation etc. of outer ring can be prevented more reliably.
More preferably, the outer diameter face of outer ring arranges the groove portion to radially inner side depression, and resin back-up ring configures in the mode in embedded groove portion.So, the movement of the axis of resin back-up ring can be limited.And, utilize groove portion, more suitably can adjust radial size.
In another aspect of this invention, rotation axis support structure comprises: running shaft; The rolling bearing of the described also supporting rotating shaft of above-mentioned either side; Be configured in the housing of the outside diameter of rolling bearing.
The producibility of the bearing of this kind of rotation axis support structure and loading property good, noise, vibration can be reduced, and sintering can be reduced, gnaw and cut.
Preferably, the coefficient of linear thermal expansion of resin back-up ring is greater than the coefficient of linear thermal expansion of housing, and the coefficient of linear thermal expansion of housing is greater than the coefficient of linear thermal expansion of running shaft and outer ring.By formation like this, the noise under low temperature environment and hot environment, vibration reliably can be reduced.
As a preferred mode of execution, running shaft and outer ring are steel, and housing is aluminum alloy.
[invention effect]
According to rolling bearing of the present invention, outer ring can be formed from the outside diameter configuration segmentation outer collar members of running shaft, make the resin back-up ring generation resiliently deformable in order to form the shape that a position of the circumference of ring-shaped member cuts off by gap and configure from outside diameter, thus can rolling bearing be loaded.So, loading can be made good.In this case, by resin back-up ring, the movement of the radial direction of segmentation outer collar members can be limited, prevent the separation of outer ring.So, special processing need not be implemented to outer ring, and resin back-up ring is simple shape, therefore, it is possible to make producibility good.And, even if under rolling bearing is configured in hot environment and low temperature environment, also can adjusts the size of the radial direction of resinous resin back-up ring, and suitably guarantee radial clearance or magnitude of interference.So, the creep of outer ring or sintering can be prevented, gnaw and cut.And, the whirling of running shaft can be prevented, and reduce noise, vibration.In addition, due to noise, vibration can be absorbed by resin back-up ring, therefore, it is possible to reduce noise, vibration.Therefore, this kind of rolling bearing can make loading and producibility good, reduce noise, vibration reduce sintering, gnaw and cut.
In addition, according to rotation axis support structure of the present invention, the producibility of bearing and loading property good, noise, vibration reduce sintering, gnaw and cut can be reduced.
Accompanying drawing explanation
Fig. 1 is the figure representing the resin back-up ring that the rolling bearing of one embodiment of the present invention possesses.
Fig. 2 is the enlarged view of a part of observing the resin back-up ring shown in Fig. 1 from outside diameter.
Fig. 3 is the figure of the rolling bearing representing one embodiment of the present invention.
Fig. 4 is the sectional view of the rolling bearing shown in Fig. 3.
Fig. 5 is the figure observing the rolling bearing shown in Fig. 3 from the arrow V direction Fig. 3.
Fig. 6 is the figure of the crankshaft supporting structure representing the rolling bearing comprising one embodiment of the present invention.
Fig. 7 is the sectional view of a part for crankshaft supporting structure shown in normal temperature environment following table diagram 6.
Fig. 8 is the sectional view of the part representing the crankshaft supporting structure shown in Fig. 6 in high temperature environments.
Fig. 9 is the sectional view of the part representing the crankshaft supporting structure shown in Fig. 6 at low ambient temperatures.
Figure 10 is the figure of a part for the crankshaft supporting structure represented in the past.
Figure 11 is the figure of a part for crankshaft supporting structure shown in normal temperature environment following table diagram 10.
Figure 12 is the sectional view of the part representing the crankshaft supporting structure shown in Figure 10 in high temperature environments.
Figure 13 is the sectional view of the part representing the crankshaft supporting structure shown in Figure 10 at low ambient temperatures.
Embodiment
Hereinafter, with reference to the accompanying drawings of embodiments of the present invention.Fig. 1 is the figure representing the resin back-up ring that the rolling bearing of one embodiment of the present invention possesses.Fig. 2 is the enlarged view observing a part for the resin back-up ring shown in Fig. 1 from the direction shown in the arrow II Fig. 1.It should be noted that, Fig. 1 is equivalent to the figure from observing from the spin axis direction of rolling bearing when being axially namely configured at rolling bearing described later.
With reference to Fig. 1 and Fig. 2, resin back-up ring 11a is resin-made, is by the shape after a position cut-out of the circumference of ring-shaped member in order to form gap 13.That is, resin back-up ring 11a has circumferentially opposed two ends 12a, 12b, and between end 12a, 12b, have the structure in gap 13.12a, 12b do not link each other in end.Under normal temperature state, in this case at 20 DEG C, end 12a, 12b are separated from one another.The shape of end 12a, 12b is when being configured at rolling bearing described later, the shape after being cut off by the plane extended vertically.That is, in end 12a, 12b, face opposed with end 12b, 12a is respectively smooth face.It should be noted that, cross section when circumferentially being cut off by resin back-up ring 11a is rectangular shape.Resin back-up ring 11a can carry out resiliently deformable in the mode expanding gap 13.And resin back-up ring 11a is equivalent to paper table back of the body direction at this, and cross section when cutting off along the direction vertical with spin axis is substantially C-shaped.
This kind of resin back-up ring 11a is fairly simple shape, therefore, it is possible to make the producibility of resin back-up ring 11a good.First the resin back-up ring 11a of this kind of shape such as both can manufacture the parts of resinous ring-type, then in the mode forming gap 13, one position of the circumference of this ring-shaped member cut off and manufacture, also overall shape can be used to become the mould of the roughly C shape shown in Fig. 1, manufactured by injection molded etc.And, also bar-shaped resin component can be bent into circular, and manufacture the resin back-up ring 11a of above-mentioned shape.
Next, the structure of the rolling bearing possessing the resin back-up ring 11a shown in Fig. 1 and Fig. 2 is described.Fig. 3 is the figure possessing the resin back-up ring 11a shown in Fig. 1 and Fig. 2 and represent the rolling bearing 21 of one embodiment of the present invention.Fig. 3 is the figure observed from spin axis (not shown) direction of the running shafts such as the bent axle supported by rolling bearing 21.It should be noted that the state representation normal temperature state shown in Fig. 3 specifically, is the figure of the state represented near 20 DEG C.Fig. 4 is sectional view when cutting off shown in Fig. 3 rolling bearing 21 by the IV-IV section in Fig. 3.Fig. 5 is the figure observing the rolling bearing 21 shown in Fig. 3 from the arrow V direction Fig. 3.
With reference to Fig. 1 ~ Fig. 5, rolling bearing 21 possesses outer ring 22, multiple roller 23, keeps the retainer 24 of roller 23, is configured in two resin back-up rings 11a, 11b of the outside diameter of rolling bearing 21.Resin back-up ring 11b is same structure with resin back-up ring 11a, and therefore the description thereof will be omitted.
Roller 23 rolls on the roller surface 27 being positioned at outer ring 22 internal side diameter.Retainer 24 has multiple grooves (not shown) of accommodating multiple roller 23.The retainer 24 of roller 23 is kept to be formed by two segmentation retainer parts 26a, 26b.Each segmentation retainer parts 26a, 26b are the spin axis by comprising rolling bearing 21 and the shape after being cut off by the retainer 24 of ring-type with the plane of rotation axis parallel.That is, retainer 24 can be divided into two segmentation retainer parts 26a, 26b, and segmentation retainer parts 26a, 26b is circumferentially configured and formed.Each segmentation retainer parts 26a, 26b can keep roller 23 respectively.
Outer ring 22 is formed by two segmentation outer collar members 25a, 25b.Each segmentation outer collar members 25a, 25b are the spin axis by comprising rolling bearing 21 and the shape after being cut off the outer ring 22 of ring-type with the plane of rotation axis parallel.That is, outer ring 22 is divided into two to split outer collar members 25a, 25b, and segmentation outer collar members 25a, 25b is circumferentially configured and formed.
Segmentation outer collar members 25a is provided with two groove portions 29a, 29c caving in from outer diameter face 28a to radially inner side.Groove portion 29a, 29c are arranged on axial different position.Similarly, segmentation outer collar members 25b is provided with two groove portions 29b, 29d caving in from outer diameter face 28b to radially inner side.When segmentation outer collar members 25a, 25b combination is formed outer ring 22, groove portion 29a, 29b and groove portion 29c, 29d become the shape of loop connecting respectively.It should be noted that, this kind of groove portion 29a ~ 29d is by carrying out cutting etc. to the respective outer diameter face 28a of outer ring partition member 25a, 25b, a part of 28b and easily formed.
At this, resin back-up ring 11a, 11b are configured to contact with outer ring 22 at the outside diameter of outer ring 22, and limit the movement of the radial direction of multiple segmentation outer collar members 25a, 25b.At this, resin back-up ring 11a is configured in the outside diameter of rolling bearing 21 in the mode of embedded groove portion 29a, 29b.Similarly, resin back-up ring 11b is configured in the outside diameter of rolling bearing 21 in the mode of embedded groove portion 29c, 29d.That is, resin back-up ring 11a, 11b are separately positioned on axial different position.
So, the movement of the radial direction of segmentation outer collar members 25a, 25b can be limited, and prevent the separation of outer ring 22.In this case, by being arranged on two resin back-up rings 11a, 11b on axial diverse location, the separation of outer ring 22 can be prevented more reliably.And, owing to configuring in the mode of embedded groove portion 29a ~ 29d, therefore, it is possible to the movement of the axis of restriction resin back-up ring 11a, 11b, and resin back-up ring 11a, 11b are configured in more reliably outer diameter face 28a, the 28b side of outer ring 22.And, as described later, groove portion 29a ~ 29d can be utilized, and more suitably adjust the size of the radial direction of rolling bearing 21.That is, by the degree of depth of groove portion 29a ~ 29b, specifically, the overhang of radially giving prominence to from outer diameter face 28a, 28b can be adjusted by the amount of recess of radial direction.
It should be noted that, under normal temperature state, when the outside diameter in outer ring 22 configures resin back-up ring 11a, 11b, the outside dimension of resin back-up ring 11a, 11b is greater than the outside dimension of outer ring 22.Specifically, under normal temperature state, resin back-up ring 11a, 11b of embedded groove portion 29a ~ 29d are slightly more outstanding than outer diameter face 28a, 28b.So, under normal temperature state, sandwiched resin back-up ring 11a, 11b between the housing described later that can configure at the outside diameter of outer ring 22 and outer ring 22 etc., thus the creep of the outer ring 22 when rotating can be prevented and reduce noise, vibration further.
Next, the rotation axis support structure comprising above-mentioned rolling bearing 21 is described, at this, the formation of the crankshaft supporting structure being bent axle is described with running shaft.Fig. 6 observes from the spin axis direction of bent axle the figure comprising the crankshaft supporting structure of the rolling bearing 21 of one embodiment of the present invention.It should be noted that, calm intelligible viewpoint is set out, and Fig. 6 represents the state after a part for crankshaft supporting structure being decomposed in the same manner as above-mentioned Figure 10.
With reference to Fig. 1 ~ Fig. 6, crankshaft supporting structure 31 comprises: as the bent axle 32 of running shaft; The rolling bearing 21 of the above-mentioned structure of supporting crankshaft 32; Be configured in the outside diameter of rolling bearing 21, and as installing the engine block 33 of housing of rolling bearing 21.Engine block 33 can be divided into two segmentation engine block parts 34a, 34b circumferentially splitting.Engine block parts 34a, 34b will be split by bolt (not shown) across rolling bearing 21 fastening, and rolling bearing 21 will be arranged on engine block 33.It should be noted that, bent axle 32 and outer ring 22 are steel, and engine block 33 is aluminum alloy.And the coefficient of linear thermal expansion of above-mentioned resin back-up ring 11a, 11b is greater than the coefficient of linear thermal expansion of engine block 33, and the coefficient of linear thermal expansion of engine block 33 is greater than the coefficient of linear thermal expansion of bent axle 32 and outer ring.
At this, the encaseing method of rolling bearing 21 to bent axle 32 is described.First, segmentation retainer parts 26a, 26b of roller 23 is maintained from the outside diameter configuration of bent axle 32.Next, from outside diameter configuration segmentation outer collar members 25a, 25b of segmentation retainer parts 26a, 26b.Then, utilize the resiliently deformable of resin back-up ring 11a, 11b, from outside diameter configuration resin back-up ring 11a, 11b of segmentation outer collar members 25a, 25b.In this case, configure in the mode of embedded groove portion 29a ~ 29d.So, rolling bearing 21 is loaded from the outside diameter of bent axle 32.Then, rolling bearing 21 is installed on engine block 33.
By formation like this, each structure member of rolling bearing 21 can be loaded from the outside diameter of bent axle 32.So, can prevent from loading with the interference of the balancer weight of the axis being positioned at bent axle 32 (not shown) etc.In this case, owing to segmentation resin back-up ring 11a, 11b can be configured from outside diameter, therefore, it is possible to make loading good.That is, what can prevent from occurring when being pressed into ring-shaped member gnaws and cuts.And, by resin back-up ring 11a, 11b, the movement of the radial direction of segmentation outer collar members 25a, 25b can be limited, and prevent the separation of outer ring 22.In addition, due to sandwiched resin back-up ring 11a, 11b between engine block 33 and the outer ring 22 of rolling bearing 21, noise, the vibration of rolling bearing 21 can therefore be absorbed by resin back-up ring 11a, 11b.Therefore, it is possible to reduce noise, vibration.And, by resin back-up ring 11a, 11b, the size of the radial direction of rolling bearing 21 can be adjusted, and suitably guarantee radial clearance or magnitude of interference.
With reference to Fig. 7, Fig. 8 and Fig. 9, this situation is described.Fig. 7 represents normal temperature environment, and specifically, being the sectional view of a part for the crankshaft supporting structure 31 represented near 20 DEG C, is the part corresponding with a part of Fig. 4.Fig. 8 represents hot environment, and specifically, being the sectional view of a part for the crankshaft supporting structure 31 represented near 150 DEG C, is the part corresponding with Fig. 7.Fig. 9 represents low temperature environment, and specifically, being the sectional view of a part for the crankshaft supporting structure 31 represented near-30 DEG C, is the part corresponding with Fig. 7.It should be noted that, coefficient of linear thermal expansion increases according to the order of the bent axle 32 of steel and outer ring 22, the engine block 33 of aluminum alloy, resinous resin back-up ring 11a, 11b.
With reference to Fig. 7 ~ Fig. 9, at the internal side diameter configuration bent axle 32 of rolling bearing 21.Under normal temperature environment, the thickness etc. of adjustment resin back-up ring 11a, 11b, to make the size A of radial clearance
1suitably.In this case, magnitude of interference is not set between outer ring 22 and engine block 33, and magnitude of interference is set at engine block 33 and between resin back-up ring 11a, 11b.
In high temperature environments, bent axle 32, outer ring 22, engine block 33 and resin back-up ring 11a, 11b carry out thermal expansion respectively to radial outside.At this, the coefficient of linear thermal expansion due to engine block 33 is greater than the coefficient of linear thermal expansion of outer ring 22, and therefore outer ring 22 increases with the gap of engine block 33.But the coefficient of linear thermal expansion due to resin back-up ring 11a, 11b is greater than the coefficient of linear thermal expansion of engine block 33, therefore can the gap of landfill outer ring 22 and engine block 33 by the thermal expansion of resin back-up ring 11a, 11b.That is, between resin back-up ring 11a, 11b and engine block 33, there is magnitude of interference.On the other hand, about the size A of the radial clearance between roller 23 and bent axle 32
2, because outer ring 22 is identical with the material of bent axle 32, therefore, it is possible to suitably formed.
At low ambient temperatures, bent axle 32, outer ring 22, engine block 33 and resin back-up ring 11a, 11b carry out thermal shrinkage respectively to radially inner side.At this, the coefficient of linear thermal expansion due to engine block 33 is greater than the coefficient of linear thermal expansion of outer ring 22, and therefore outer ring 22 reduces with the gap of engine block 33.But, coefficient of linear thermal expansion due to resin back-up ring 11a, 11b is greater than the coefficient of linear thermal expansion of engine block 33, therefore by the thermal shrinkage of resin back-up ring 11a, 11b and the utilization of groove portion 29a ~ 29d, resin back-up ring 11a, 11b can be made not to abut with engine block 33 and outer ring 22 is abutted with engine block 33, thus eliminate gap.That is, between outer ring 22 and engine block 33, there is magnitude of interference B
3.On the other hand, about the size A of the radial clearance between roller 23 and bent axle 32
3, can suitably be formed.
Table 1 represents in the crankshaft supporting structure 31 of the rolling bearing 21 comprising above-mentioned structure, the result of the size of the radial direction under each environment of mensuration etc.And table 2 represents in the crankshaft supporting structure comprising the rolling bearing in the past shown in Figure 10 etc., the result of the size of the radial direction under each environment of mensuration etc.
[table 1]
[table 2]
With reference to table 1 and table 2, about radial clearance, in crankshaft supporting structure in the past, change between 0.002mm ~ 0.050mm.In contrast, in the crankshaft supporting structure 31 of above-mentioned structure, become 0.002mm ~ 0.015mm, variable quantity reduces.Therefore, it is possible to reduce the variable quantity also suitably guaranteeing radial clearance and the stable rotation guaranteeing bent axle 32, thus noise, vibration can be reduced.
In addition, about magnitude of interference, in crankshaft supporting structure in the past, when guaranteeing the magnitude of interference at 150 DEG C, the magnitude of interference at-30 DEG C increases to 0.045mm.In contrast, in the crankshaft supporting structure 31 of above-mentioned structure, by being configured in resin back-up ring 11a, the 11b between outer ring 22 and engine block 33, only considering and guaranteeing the magnitude of interference of-30 DEG C.So, can make the radial clearance under each environment and magnitude of interference suitable.
As mentioned above, this kind of rolling bearing 21 can make loading and producibility good, reduce noise, vibration reduce sintering, gnaw and cut.
In addition, the producibility of the rolling bearing 21 of this kind of crankshaft supporting structure 31 and loading property good, noise, vibration reduce sintering, gnaw and cut can be reduced.
It should be noted that, under normal temperature state, the length of the circumference in gap 13 is D
1and the external diameter of outer ring is D
2time, preferably there is 0 < D
1≤ 0.4D
2relation (with reference to Fig. 5).So, the separation etc. of outer ring 22 can be prevented more reliably.
In addition, in the above-described embodiment, rolling bearing 21 is provided with two resin back-up rings 11a, 11b, but is not limited thereto, both a resin back-up ring can be only set, the resin back-up ring of more than three also can be set.
It should be noted that, in the above-described embodiment, resin back-up ring 11a, 11b are arranged in the groove portion 29a ~ 29d of the upper setting of outer diameter face 28a, 28b embedding outer ring 22, but be not limited thereto, also can groove portion 29a ~ 29d be not set at outer diameter face 28a, 28b and directly make resin back-up ring 11a, 11b chimeric with outer diameter face 28a, 28b.So, special processing need not be implemented to outer ring, and the separation of outer ring can be prevented.And groove portion 29a ~ 29d may not be the structure of loop connecting, and the part forming channel-shaped be everywhere configured in circumference make a part for resin back-up ring embed the part of this channel-shaped.
In addition, resin back-up ring 11a, 11b are formed as cross section rectangular shape, but are not limited thereto, and also can be cross section hole shape etc.
Above, with reference to the accompanying drawings of embodiments of the present invention, but the present invention is not limited to illustrated mode of execution.Relative to illustrated mode of execution, in the scope identical with the present invention or in the scope of equalization, various amendment, distortion can be applied.
[industrial applicibility]
Rolling bearing of the present invention and rotation axis support structure are effectively utilised as Vehicle component.
[symbol description]
11a, 11b resin back-up ring
12a, 12b end
13 gaps
21 rolling bearings
22 outer rings
23 rollers
24 retainers
25a, 25b split outer collar members
26a, 26b split retainer parts
27 roller surfaces
28a, 28b outer diameter face
29a, 29b, 29c, 29d groove portion
31 crankshaft supporting structures
32 bent axles
33 engine blocks
34a, 34b split engine block parts
Claims (7)
1. a rolling bearing, possesses:
Multiple segmentation outer collar members is circumferentially configured and the outer ring formed;
Multiple roller that the roller surface of described outer ring rolls;
In order to form the shape that gap is formed as a position of the circumference of ring-shaped member to cut off, be configured to contact with described outer ring at the outside diameter of described outer ring, and to the resin back-up ring that the movement of the radial direction of described multiple segmentation outer collar members limits,
Under normal temperature state, when the outside diameter of described outer ring configures described resin back-up ring, the outside dimension of described resin back-up ring is greater than the outside dimension of described outer ring,
Under normal temperature state, the length of the circumference in described gap is D
1and the external diameter of described outer ring is D
2time, there is 0 < D
1≤ 0.4D
2relation,
Under normal temperature state, between described outer ring and engine block, magnitude of interference is not set,
The outer diameter face of described outer ring arranges the groove portion to radially inner side depression,
Described groove portion extends along straight direction in the circumferential,
Described resin back-up ring configures in the mode embedding described groove portion,
Thus under normal temperature state, the condition of high temperature higher than described normal temperature state, the low-temperature condition lower than described normal temperature state, suitably guarantee radial clearance and the magnitude of interference of the surrounding of described rolling bearing.
2. rolling bearing according to claim 1, wherein,
The cross section of described resin back-up ring when being cut off by described resin back-up ring along the direction vertical with spin axis is substantially C-shaped.
3. rolling bearing according to claim 1, wherein,
Cross section when circumferentially being cut off by described resin back-up ring is rectangular shape.
4. rolling bearing according to claim 1, wherein,
Described resin back-up ring arranges multiple vertically.
5. a rotation axis support structure, comprising:
Running shaft;
The rolling bearing of described running shaft is supported described in claim 1;
Be configured in the housing of the outside diameter of described rolling bearing.
6. rotation axis support structure according to claim 5, wherein,
The coefficient of linear thermal expansion of described resin back-up ring is greater than the coefficient of linear thermal expansion of described housing,
The coefficient of linear thermal expansion of described housing is greater than the coefficient of linear thermal expansion of described running shaft and described outer ring.
7. rotation axis support structure according to claim 5, wherein,
Described running shaft and described outer ring are steel,
Described housing is aluminum alloy.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2008271661A JP5303240B2 (en) | 2008-10-22 | 2008-10-22 | Rolling bearing and rotating shaft support structure |
| JP2008-271661 | 2008-10-22 | ||
| PCT/JP2009/067059 WO2010047213A1 (en) | 2008-10-22 | 2009-09-30 | Rolling bearing and rotating-shaft support structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102187106A CN102187106A (en) | 2011-09-14 |
| CN102187106B true CN102187106B (en) | 2016-02-03 |
Family
ID=42119257
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200980141598.3A Expired - Fee Related CN102187106B (en) | 2008-10-22 | 2009-09-30 | Rolling bearing and rotation axis support structure |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP5303240B2 (en) |
| CN (1) | CN102187106B (en) |
| DE (1) | DE112009002563T5 (en) |
| WO (1) | WO2010047213A1 (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ITTO20120918A1 (en) * | 2012-10-17 | 2014-04-18 | Skf Ab | ANTI-SLIP DEVICE FOR A ROLLING BEARING RING AND BEARING EQUIPPED WITH THE SAME |
| CN102937138A (en) * | 2012-10-30 | 2013-02-20 | 无锡风电设计研究院有限公司 | Rolling bearing in support type roller structure |
| CN103206461B (en) * | 2013-03-21 | 2015-06-17 | 洛阳轴研科技股份有限公司 | Method for eliminating axial thermal expansion generated by high-speed matched angular contact ball bearing |
| DE102013210693A1 (en) * | 2013-06-07 | 2014-12-11 | Schaeffler Technologies Gmbh & Co. Kg | Bearing arrangement for two adjacent gears, in particular for two gear wheels in a dual-clutch transmission |
| DE102014209105B4 (en) * | 2014-05-14 | 2016-02-04 | Aktiebolaget Skf | Device for dismantling a bearing ring |
| CN104265771B (en) * | 2014-09-23 | 2017-02-15 | 徐州重型机械有限公司 | Bearing, pulley assembly, telescopic arm and crane |
| US10523082B2 (en) * | 2016-04-21 | 2019-12-31 | Safran Electrical & Power | Bearing assembly for electrical generator |
| DE102018127029A1 (en) * | 2018-10-30 | 2020-04-30 | Schaeffler Technologies AG & Co. KG | Acoustically optimized storage unit |
| JP2020148316A (en) * | 2019-03-15 | 2020-09-17 | Ntn株式会社 | Rolling bearing |
| CN113042764B (en) * | 2021-03-30 | 2022-03-01 | 河南科技大学 | Bearing spacer ring for self-compensating machine tool spindle bearing heat-induced pretightening force and production method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3356877B2 (en) * | 1994-05-31 | 2002-12-16 | エヌティエヌ株式会社 | Manufacturing method of split bearing |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1920148A (en) | 1929-06-06 | 1933-07-25 | Soudure Electr Antogene Sa | Fusible electrode for electric welding |
| JPH0681846A (en) | 1992-08-31 | 1994-03-22 | Ntn Corp | Split type bearing |
| JPH06109025A (en) * | 1992-09-29 | 1994-04-19 | Ntn Corp | Split type bearing |
| JPH06229415A (en) | 1993-01-29 | 1994-08-16 | Fuji Heavy Ind Ltd | Crankshaft bearing for internal combustion engine |
-
2008
- 2008-10-22 JP JP2008271661A patent/JP5303240B2/en not_active Expired - Fee Related
-
2009
- 2009-09-30 CN CN200980141598.3A patent/CN102187106B/en not_active Expired - Fee Related
- 2009-09-30 WO PCT/JP2009/067059 patent/WO2010047213A1/en active Application Filing
- 2009-09-30 DE DE112009002563T patent/DE112009002563T5/en not_active Withdrawn
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3356877B2 (en) * | 1994-05-31 | 2002-12-16 | エヌティエヌ株式会社 | Manufacturing method of split bearing |
Also Published As
| Publication number | Publication date |
|---|---|
| DE112009002563T5 (en) | 2012-06-28 |
| JP2010101364A (en) | 2010-05-06 |
| WO2010047213A1 (en) | 2010-04-29 |
| CN102187106A (en) | 2011-09-14 |
| JP5303240B2 (en) | 2013-10-02 |
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