WO2016125516A1 - Dispositif de roulement pour véhicule ferroviaire - Google Patents

Dispositif de roulement pour véhicule ferroviaire Download PDF

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Publication number
WO2016125516A1
WO2016125516A1 PCT/JP2016/050185 JP2016050185W WO2016125516A1 WO 2016125516 A1 WO2016125516 A1 WO 2016125516A1 JP 2016050185 W JP2016050185 W JP 2016050185W WO 2016125516 A1 WO2016125516 A1 WO 2016125516A1
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WO
WIPO (PCT)
Prior art keywords
sleeve
spacer
inner ring
peripheral surface
bearing device
Prior art date
Application number
PCT/JP2016/050185
Other languages
English (en)
Japanese (ja)
Inventor
鈴木　健吾
Original Assignee
Ntn株式会社
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Filing date
Publication date
Application filed by Ntn株式会社 filed Critical Ntn株式会社
Publication of WO2016125516A1 publication Critical patent/WO2016125516A1/fr

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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
    • F16C19/34—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 for both radial and axial load
    • F16C19/38—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 for both radial and axial load with two or more rows of rollers
    • F16C19/383—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 for both radial and axial load with two or more rows of rollers with tapered rollers, i.e. rollers having essentially the shape of a truncated cone
    • F16C19/385—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 for both radial and axial load with two or more rows of rollers with tapered rollers, i.e. rollers having essentially the shape of a truncated cone with two rows, i.e. double-row tapered roller bearings
    • F16C19/386—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 for both radial and axial load with two or more rows of rollers with tapered rollers, i.e. rollers having essentially the shape of a truncated cone with two rows, i.e. double-row tapered roller bearings in O-arrangement
    • 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
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
    • F16C33/7803—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members suited for particular types of rolling bearings
    • F16C33/7813—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members suited for particular types of rolling bearings for tapered roller bearings
    • 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
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
    • F16C33/7816—Details of the sealing or parts thereof, e.g. geometry, material
    • F16C33/782—Details of the sealing or parts thereof, e.g. geometry, material of the sealing region
    • F16C33/7826—Details of the sealing or parts thereof, e.g. geometry, material of the sealing region of the opposing surface cooperating with the seal, e.g. a shoulder surface of a bearing ring
    • 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
    • F16C35/073—Fixing them on the shaft or housing with interposition of an element between shaft and inner race ring
    • 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
    • F16C19/52—Bearings with rolling contact, for exclusively rotary movement with devices affected by abnormal or undesired conditions
    • F16C19/527—Bearings with rolling contact, for exclusively rotary movement with devices affected by abnormal or undesired conditions related to vibration and noise
    • 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
    • F16C2326/00—Articles relating to transporting
    • F16C2326/10—Railway vehicles

Definitions

  • the present invention relates to a bearing device used for an axle of a railway vehicle, for example.
  • a bearing device used for an axle of a railway vehicle there is one provided with a tapered roller bearing and a front lid and a rear lid for positioning the tapered roller bearing with respect to the axle.
  • the tapered roller bearing in this bearing device is held so as to be able to roll between a pair of inner rings having raceways on the outer peripheral surface, an outer ring having double-row raceways on the inner peripheral surface, and a raceway of the inner ring and outer raceway.
  • a sealing device oil seal
  • the front lid is in contact with one of the pair of inner rings and the rear cover is in contact with the other inner ring, so that the tapered roller bearing is fixed at a predetermined position of the axle (see, for example, Patent Document 1). ).
  • stick slip may occur between the inner ring and the axle when assembled to the axle.
  • Stick-slip refers to self-excited vibration caused by microscopic adhesion between the friction surfaces and repeated sliding, and can occur when the inner ring is pressed into the axle.
  • the vibration causes the annular spacer inserted through the axle to tilt down, making it difficult to position the assembly and making the assembly work difficult.
  • the present invention has been made in view of the above circumstances, and an object of the present invention is to provide a railway vehicle bearing device that can suppress wear due to fretting and can be easily assembled to an axle. To do.
  • a railcar bearing device is for solving the above-described problem, and includes an inner ring having a track on an outer peripheral surface, an outer ring having a track on an inner peripheral surface, the track of the inner ring, and the A bearing having a rolling element that is rotatably held between the outer ring and the raceway, a front lid and a rear lid for fixing the bearing to an axle, and an intermediate between the inner ring and the rear lid. And a part of the spacer is configured to be fitted to the outer peripheral surface of the inner ring.
  • the spacer can be reliably positioned and fixed by fitting a part of the spacer to the outer peripheral surface of the inner ring.
  • a part of the spacer is configured as a sleeve that fits to the outer peripheral surface of the inner ring, and the bearing is attached to the inner peripheral surface of the outer ring and seals that are in sliding contact with the sleeve. It is preferable to provide a main body.
  • a part of the spacer is fitted as a sleeve to the outer peripheral surface of the inner ring, and the seal main body is slidably contacted with the sleeve, so that the inner ring and the outer ring can be sealed (sealed). Furthermore, since the seal body does not slidably contact the outer peripheral surface of the inner ring, the inner ring can be prevented from being worn.
  • the spacer includes an inner protruding portion that protrudes radially inward from the sleeve and that contacts both an end surface of the inner ring and an end surface of the rear lid.
  • the inner protrusion comes into contact with the end surface of the inner ring and the end surface of the rear lid, it is possible to suppress wear due to fretting between the inner ring and the rear lid.
  • the bearing device includes an outer protrusion that protrudes radially outward from the sleeve and covers the seal body on the inner side of the bearing.
  • the spacer is preferably made of steel or brass.
  • the sleeve which is a part of the spacer, is also made of the same material, so that the wear resistance of the sleeve against the sliding contact of the seal body can be sufficiently secured.
  • an annular member made of an elastic body be interposed between the inner peripheral surface of the sleeve and the outer peripheral surface of the inner ring.
  • the dimensional relationship between the inner ring and the axle is designed to be an interference fit, and by fitting the sleeve to the outer peripheral surface of the inner ring, the surface pressure increases locally in this part, and the local part of the axle May cause general wear.
  • an elastically deformable annular member between the sleeve and the inner ring as described above, when the inner ring is press-fitted into the sleeve, the elastic deformation of the annular member prevents the influence of the deformation of the inner ring on the axle. It becomes possible to make it as small as possible.
  • a diamond-like carbon film may be formed on the spacer in order to improve wear resistance against wear due to fretting.
  • the abrasion resistance of the sleeve against the sliding contact of the seal body is also improved by forming a coating on the sleeve which is a part of the spacer.
  • FIG. 1 is a cross-sectional view showing an embodiment of a bearing device according to the present invention.
  • FIG. 2 is an enlarged cross-sectional view of a main part of the bearing device.
  • FIG. 3 is an enlarged sectional view of a main part showing another example of the bearing device according to the present invention.
  • FIG. 4 is an enlarged cross-sectional view showing a main part of another example of the bearing device according to the present invention.
  • FIG. 5 is an enlarged sectional view of a main part showing another example of the bearing device according to the present invention.
  • FIG. 6 is an enlarged cross-sectional view showing a main part of another example of the bearing device according to the present invention.
  • bearing device for carrying out a railway vehicle bearing device (hereinafter simply referred to as “bearing device”) according to the present invention
  • 1 and 2 show an embodiment of a bearing device according to the present invention.
  • FIG. 1 shows an example in which the bearing device 1 is assembled to an axle S of a railway vehicle.
  • the bearing device 1 includes a tapered roller bearing 2, a front lid 3 and a rear lid 4 for fixing the tapered roller bearing 2, and an annular spacer 5 interposed between the tapered roller bearing 2 and the rear lid 4. .
  • a position near the axial end of the axle S is referred to as “front” or “front side”, and a position closer to the center in the axial direction of the axle S than the front (side) is referred to as “rear” or “ It is called “the rear side”.
  • the “radial direction” basically refers to the radial direction of the axle S, but the front lid 3 and the rear lid 4 that are concentrically arranged on the axle S, and a tapered roller bearing described later. 2 may also refer to the radial direction of the inner ring 7, the outer ring 9, the sleeves 21 and 31, the seal case 33 and the like.
  • a direction away from the center is referred to as “radially outward”, and a direction toward the center is referred to as “radially inward”.
  • the position on the radially inner side is referred to as “inside” or “inside”
  • the position on the radially outer side from this inside (side) is referred to as “outside” or “ It is called “outside”.
  • the tapered roller bearing 2 includes a pair of inner rings 7f and 7r having a tapered raceway 6 on the outer peripheral surface, an outer ring 9 having a tapered raceway 8 on the inner peripheral surface, a raceway 6 of the inner ring 7 and a raceway 8 of the outer ring 9.
  • a plurality of tapered rollers (rolling elements) 10 that are provided so as to roll freely, retainers 11f and 11r that hold the tapered rollers 10 at predetermined intervals so that they can roll, and inner rings 7f and 7r, Sealing devices (oil seals) 12f and 12r for sealing between the outer ring 9 are provided.
  • Each inner ring 7f, 7r has a small brim 14 at one end and a large brim 15 at the other end so as to sandwich the track 6.
  • Each of the inner rings 7f and 7r brings the tapered roller 10 into contact with the raceway 6 so that the side surface (rolling surface) of the tapered roller 10 is brought into contact, and the tapered roller 10 rolls between the small collar 14 and the large collar 15. keeping.
  • a spacer 13 is provided between the pair of inner rings 7f and 7r.
  • the outer ring 9 has a double-row raceway 8 configured in a conical shape and annular recesses 16f and 16r on its inner peripheral surface.
  • the annular recesses 16 f and 16 r are formed at both end portions (front end portion and rear end portion) in the axial direction of the outer ring 9.
  • an air vent 17 for releasing the bearing internal pressure is provided at the axial center of the outer ring 9.
  • the plurality of tapered rollers 10 are arranged in a double row corresponding to the raceway 6 of the pair of inner rings 7f and 7r and the double row raceway 8 of the outer ring 9.
  • Each tapered roller 10 has a large-diameter end 18 and a small-diameter end 19.
  • the small diameter ends 19 of the tapered rollers 10 in one row and the small diameter ends 19 of the tapered rollers 10 in the other row are arranged to face each other.
  • the retainers 11f and 11r include a front retainer 11f and a rear retainer 11r so as to correspond to the track 6 of the pair of inner rings 7f and 7r and the double-row track 8 of the outer ring 9.
  • Each retainer 11f, 11r is configured in an annular shape (cylindrical shape) and holds a plurality of tapered rollers 10 at equal intervals in the circumferential direction.
  • Each retainer 11f, 11r has a pocket 20 that holds each tapered roller 10 in a rollable manner while maintaining the interval between the tapered rollers 10.
  • the sealing devices 12f and 12r include a first sealing device 12f that seals between the inner ring 7f and the outer ring 9 on the front side of the tapered roller bearing 2, and an inner ring 7r on the rear side of the tapered roller bearing 2. And a second sealing device 12r for sealing between the outer ring 9.
  • the first sealing device 12f includes a sleeve (hereinafter referred to as “first sleeve”) 21 fitted to the outer peripheral surface of the front inner ring 7f, and a seal body (hereinafter referred to as “first seal body”) slidably in contact with the first sleeve 21. 22.
  • first sleeve a sleeve
  • first seal body a seal body slidably in contact with the first sleeve 21. 22.
  • the first sleeve 21 can be made of, for example, a brass plate, a high-strength brass casting, a cold-rolled steel plate, a hot-rolled mild steel plate, a high-tensile steel plate, a stainless steel plate, a high hot-dip plated steel plate, or the like.
  • the plate thickness of the first sleeve 21 is desirably 0.8 mm to 2.0 mm, but is not limited to this plate thickness.
  • the first sleeve 21 is fitted to the outer peripheral surface of the large brim 15 in the inner ring 7f on the front side.
  • the first sleeve 21 includes a linear inner cylindrical portion 23, an annular outer protruding portion 24 that protrudes radially outward from the inner cylindrical portion 23, and a rearward direction from the radially outer end of the outer protruding portion 24. And a projecting outer cylindrical portion 25.
  • the first seal body 22 includes a cored bar 26 and an elastic seal 27 formed integrally with the cored bar 26.
  • the core metal 26 includes a cylindrical attachment portion 28 attached to the outer ring 9 and a support portion 29 that supports the elastic seal 27.
  • the attachment portion 28 is fitted into the front annular recess 16 f of the outer ring 9.
  • the support portion 29 is formed in an annular shape that protrudes inward in the radial direction from one end portion (front end portion) of the attachment portion 28.
  • the elastic seal 27 is made of rubber and is configured integrally with the support portion 29 by baking.
  • the elastic seal 27 includes three seal lips 30. Of the three seal lips 30, one seal lip 30 is close to the inner peripheral surface of the outer cylindrical portion 25 of the first sleeve 21.
  • one seal lip 30 is close to the outer peripheral surface of the inner cylindrical portion 23 of the first sleeve 21, and the other seal lip 30 is the outer peripheral surface of the inner cylindrical portion 23. Touching.
  • the outer projecting portion 24 and the outer cylindrical portion 25 of the first sleeve 21 also function as a cover portion that covers the elastic seal 27 of the first seal body 22.
  • FIG. 2 shows an enlarged cross-sectional view of the second sealing device 12r.
  • the second sealing device 12r includes a sleeve (hereinafter referred to as “second sleeve”) 31 fitted to the outer peripheral surface of the rear inner ring 7r, and the second sleeve 31.
  • a seal main body (hereinafter referred to as “second seal main body”) 32 and a seal case 33 for accommodating the second seal main body 32 are provided.
  • the second sleeve 31 has a linear cylindrical shape and is fitted on the outer peripheral surface of the large brim 15 in the rear inner ring 7r.
  • the spacer 5 is integrally provided at the rear end portion of the second sleeve 31.
  • the spacer 5 is configured as an inner protrusion that protrudes radially inward from the rear end of the second sleeve 31.
  • the integrally configured spacer 5 and the second sleeve 31 are made of, for example, a brass plate, a high-strength brass casting, a cold-rolled steel plate, a hot-rolled mild steel plate, a high-tensile steel plate, a stainless steel plate, a high-melt-plated steel plate, or the like. obtain.
  • the plate thickness of the spacer 5 and the second sleeve 31 is desirably 0.8 mm to 2.0 mm, as with the first sleeve 21, but is not limited to this plate thickness.
  • the spacer 5 When the second sleeve 31 is attached to the large brim 15 of the rear inner ring 7r, one surface, that is, the front surface of the spacer 5 contacts the rear end portion (rear end surface) of the inner ring 7r.
  • the other surface of the spacer 5, that is, the rear surface is in contact with the front end portion (front end surface) of the rear lid 4. Therefore, the spacer 5 is sandwiched between the rear end portion of the rear inner ring 7 r and the front end portion of the rear lid 4.
  • a film of diamond-like carbon (DLC) may be formed on the surface of the second sleeve 31 in order to improve the wear resistance of the second sleeve 31 against the sliding of the seal body 32.
  • this coating may be formed on both sides of the spacer 5. Thereby, the wear resistance of the spacer 5 against wear due to fretting between the rear inner ring 7r and the rear lid 4 is improved.
  • the second seal body 32 includes a cored bar 34 and an elastic seal 35, similarly to the first seal body 22.
  • the core metal 34 includes an attachment portion 36 attached to the annular recess 16 r at the rear end portion of the outer ring 9 and a support portion 37 that supports the elastic seal 35.
  • the attachment portion 36 of the second seal body 32 is fitted into the seal case 33 and attached to the annular recess 16r of the outer ring 9 via the seal case 33.
  • the support portion 37 is configured in an annular shape that protrudes radially inward from one end portion of the attachment portion 36.
  • the elastic seal 35 is made of rubber and is configured integrally with the support portion 37 by baking.
  • the elastic seal 35 includes two seal lips 38. Of the two seal lips 38, one seal lip 38 is close to the outer peripheral surface of the second sleeve 31 in the second sleeve 31, and the other seal lip 38 is in contact with the outer peripheral surface of the second sleeve 31. is doing.
  • the seal case 33 includes a cylindrical attachment portion 39 that is fitted into the annular recess 16r at the rear end portion of the outer ring 9, and an annular inner protrusion portion 40 that protrudes radially inward from one end portion of the attachment portion 39. .
  • the attachment portion 39 is fitted in the annular recess 16r of the outer ring 9 in a state where the attachment portion 36 of the second seal main body 32 is fitted to the inner peripheral surface thereof.
  • the tapered roller bearing 2 ensures high sealing performance by the double fitting structure of the mounting portion 32 of the second seal body 32 and the mounting portion 39 of the seal case 33.
  • the inner projecting portion 40 of the seal case 33 functions as a cover portion that covers the second seal body 32 from the rear side.
  • the inner protruding portion 40 is configured such that the protruding end portion is close to the outer peripheral surface of the second sleeve 31. Thereby, a labyrinth seal is formed between the inner protrusion 40 and the second sleeve 31.
  • the front lid 3 is for covering the end portion of the axle S, and is configured in a disk shape having a diameter larger than the diameter of the end portion of the axle S.
  • the front lid 3 includes an insertion hole 42 through which the bolt 41 can be inserted, and a contact portion 43 that contacts the front inner ring 7f.
  • the front lid 3 is fixed to the axle S by aligning the insertion hole 42 with the screw hole 44 formed at the end of the axle S and screwing the bolt 41 into the screw hole 44 through the insertion hole 42. .
  • the contact portion 43 of the front lid 3 contacts the front end portion of the inner ring 7f on the front side.
  • the rear lid 4 is formed in an annular shape, and the axle S is inserted inside thereof.
  • the rear lid 4 includes a small diameter cylindrical portion 45, a tapered portion 46 that increases in diameter toward the rear, and a large diameter cylindrical portion 47.
  • the front end portion of the rear lid 4, that is, the front end portion of the small diameter cylindrical portion 45 is in contact with the spacer 5 of the second sleeve 31.
  • the outer diameter of the small-diameter cylindrical portion 45 is set smaller than the outer diameter of the large brim 15 in the rear inner ring 7r. Further, the outer diameter of the large-diameter cylindrical portion 47 is larger than the outer diameter of the large brim 15 in the rear inner ring 7r, and the diameter of the annular recess 16r in the rear end portion of the outer ring 9 or the outside of the mounting portion 39 in the seal case 33 It is almost the same as the diameter.
  • the spacer 5 is interposed between the rear end surface of the rear inner ring 7r and the front end surface of the rear cover 4, so that the inner ring 7r and the rear cover 4 Wear due to fretting can be suppressed. Since the spacer 5 is configured integrally with the second sleeve 31, the spacer 5 is fitted by fitting the second sleeve 31 which is a part of the spacer 5 to the outer peripheral surface of the rear inner ring 7r. It is positioned and fixed to the inner ring 7r.
  • the bearing device 1 can be easily and efficiently assembled to the axle S. Further, when the second sleeve 31 is fitted to the outer peripheral surface of the inner ring 7r, the spacer 5 comes into contact with the rear end surface of the inner ring 7r, so that the positioning of the second sleeve 31 is also performed at the same time. Therefore, when the second seal body 32 is slidably contacted with the outer peripheral surface of the second sleeve 31 as in the present embodiment, it is not necessary to position the second sleeve 31 with respect to the second seal body 32. Assembling work of the bearing device 1 with respect to the axle shaft S can be performed more efficiently.
  • the spacer 5 integrally with the second sleeve 31, the number of parts can be reduced, which also greatly contributes to an improvement in assembling workability. Furthermore, since the second sleeve 31 and the spacer 5 can be simultaneously replaced during the maintenance of the bearing device 1, this maintenance work can be easily and efficiently performed.
  • FIG. 3 shows another example of the bearing device 1 according to the present invention.
  • the seal case 33 in this example includes a cylindrical attachment portion 39 attached to the annular recess 16r at the rear end portion of the outer ring 9, and a first inner protrusion portion 40a protruding radially inward from one end of the attachment portion 39.
  • a cylindrical portion 48 projecting backward from the first inner projecting portion 40a and a second inner projecting portion 40b projecting radially inward from the rear end portion of the cylindrical portion 48 are provided.
  • the labyrinth seal is formed between the projecting end of the first inner projecting portion 40a of the seal case 33 close to the outer peripheral surface of the second sleeve 31. Further, the protruding end portion of the second inner protruding portion 40 b is brought close to the outer peripheral surface of the small diameter cylindrical portion 45 in the rear lid 4, thereby forming a labyrinth seal therebetween.
  • FIGS. 4 and 5 show another example of the bearing device 1 according to the present invention.
  • the configuration of the second sleeve 31 in the second sealing device 12r is different from the examples of FIGS.
  • one end portion (rear end portion) of the second sleeve 31 is formed with a spacer 5 (inner protruding portion) that protrudes inward in the radial direction.
  • An outer protrusion 49 protruding outward in the radial direction is formed at the end (front end).
  • This outer protrusion 49 is for preventing grease inside the bearing from scattering and contacting the elastic seal 35 during rotation. For this reason, the outer side protrusion part 49 is located in the bearing inner side and the front side rather than the elastic seal 35 (not shown in this example) of the 2nd seal main body 32.
  • the height of the outer protrusion 49 projecting outward in the radial direction is set to a height that can cover the entire seal lip 38 of the elastic seal 35.
  • an inclined portion 50 that is inclined rearward is provided at the protruding end portion of the outer protruding portion 49.
  • FIG. 6 shows another example of the bearing device 1 according to the present invention.
  • the configuration of the second sleeve 31 that is a part of the spacer 5 is different from the example of FIGS. 1 and 2.
  • an annular member 51 formed of an elastic body for example, rubber
  • an annular member 51 that is elastically deformable is interposed between the second sleeve 31 and the inner ring 7r, so that when the inner ring 7r is press-fitted into the second sleeve 31, the annular member 51 is elastically deformed. It is possible to prevent local wear on the axle S due to the deformation of the inner ring 7r.
  • the bearing apparatus 1 which concerns on this invention is not limited to the structure of the said embodiment.
  • the bearing device 1 according to the present invention is not limited to the above-described effects.
  • the bearing device 1 according to the present invention can be variously modified without departing from the gist of the present invention.
  • the present invention is not limited to this, and the first sleeve 21 may have the same configuration as the second sleeve 32. That is, the first sleeve 21 and the spacer (inner protruding portion) are integrally formed, the first sleeve 21 is fitted into the outer peripheral surface of the front inner ring 7f, and the spacer (inner protruding portion) is fitted to the front inner ring 7f. You may interpose between the front-end surface and the contact part 43 of the front lid 3.
  • the annular member 51 made of an elastic body is provided on the inner peripheral surface of the second sleeve 31
  • the present invention is not limited to this, and the annular member 51 is configured separately from the second sleeve 31.
  • the second sleeve 31 may be attached to the outer peripheral surface of the annular member 51 after the annular member 51 is attached to the outer peripheral surface of the inner ring 7r. Further, the annular member 51 may be fixedly integrated with the outer peripheral surface of the large brim 15 of the inner ring 7r.
  • the tapered roller bearing 2 is exemplified as the rolling bearing, but the present invention is not limited to this, and the present invention can also be applied to a cylindrical roller bearing and other bearings.
  • the annularly configured spacer 5 is exemplified.
  • the present invention is not limited to this, and for example, a plurality of inner protrusions that protrude radially inward from a plurality of locations at the rear end of the second sleeve 31 are provided. These may be formed and used as the spacer 5.
  • Bearing device 2 Bearing (tapered roller bearing) 3 Front lid 4 Rear lid 5 Spacer 7 Inner ring 9 Outer ring 10 Rolling element (tapered roller) 11 Cage 12 Sealing device 31 Second sleeve 32 Seal body 49 Outer protrusion 51 Annular member S Axle

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rolling Contact Bearings (AREA)
  • Mounting Of Bearings Or Others (AREA)
  • Sealing Of Bearings (AREA)

Abstract

Dispositif de roulement 1 destiné à un véhicule ferroviaire pourvu : d'un roulement 2 pourvu d'une bague intérieure 7 ayant un chemin de roulement 6 sur la surface circonférentielle extérieure, une bague extérieure 9 ayant un chemin de roulement 8 sur la surface circonférentielle intérieure, et des éléments roulants 10 qui sont maintenus et peuvent rouler entre le chemin de roulement 6 de la bague intérieure 7 et le chemin de roulement 8 de la bague extérieure 9 ; d'un dispositif d'étanchéité 12 pour créer un joint d'étanchéité entre la bague intérieure 7 et la bague extérieure 9 ; d'un couvercle avant 3 et d'un couvercle arrière 4 pour fixer le roulement 2 à un essieu S ; et d'un écarteur 5 intercalé entre la bague intérieure 7 du roulement 2 et le couvercle arrière 4, une partie de l'écarteur 5 étant installée dans la surface circonférentielle extérieure de la bague intérieure 7.
PCT/JP2016/050185 2015-02-03 2016-01-06 Dispositif de roulement pour véhicule ferroviaire WO2016125516A1 (fr)

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JP2015019419A JP2016142364A (ja) 2015-02-03 2015-02-03 鉄道車両用軸受装置

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JP6782600B2 (ja) * 2016-10-04 2020-11-11 ナブテスコ株式会社 シール及びシール機構
US10746228B2 (en) * 2017-10-23 2020-08-18 Amsted Rail Company, Inc. Temperature-robust polymer shroud for roller bearing seal
CN110230644A (zh) * 2019-07-08 2019-09-13 浙江正泰新能源开发有限公司 外置滑块的光伏跟踪器轴承结构
RU196700U1 (ru) * 2019-12-09 2020-03-12 Акционерное общество "ЕПК Саратов" Буксовый подшипниковый узел

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JPH04117213U (ja) * 1991-01-31 1992-10-20 エヌテイエヌ株式会社 軸受のシール構造
JP2004500518A (ja) * 1998-03-23 2004-01-08 エスケイエフ　エンジニアリング　アンド　リサーチ　センター　ビーブイ 改良された防フレッチング挙動を行う軸受ユニット、特に鉄道用車軸箱の軸受ユニット
JP2006002815A (ja) * 2004-06-16 2006-01-05 Koyo Seiko Co Ltd 鉄道車両用軸受ユニット
JP2006207685A (ja) * 2005-01-27 2006-08-10 Nachi Fujikoshi Corp 車軸軸受装置
JP2011256965A (ja) * 2010-06-10 2011-12-22 Ntn Corp 鉄道車両の車軸用軸受装置

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JPH04117213U (ja) * 1991-01-31 1992-10-20 エヌテイエヌ株式会社 軸受のシール構造
JP2004500518A (ja) * 1998-03-23 2004-01-08 エスケイエフ　エンジニアリング　アンド　リサーチ　センター　ビーブイ 改良された防フレッチング挙動を行う軸受ユニット、特に鉄道用車軸箱の軸受ユニット
JP2006002815A (ja) * 2004-06-16 2006-01-05 Koyo Seiko Co Ltd 鉄道車両用軸受ユニット
JP2006207685A (ja) * 2005-01-27 2006-08-10 Nachi Fujikoshi Corp 車軸軸受装置
JP2011256965A (ja) * 2010-06-10 2011-12-22 Ntn Corp 鉄道車両の車軸用軸受装置

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110550059A (zh) * 2018-05-31 2019-12-10 斯凯孚公司 用于将轨道车辆主体连接到轴承的轨道车辆适配器

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