WO2022244872A1 - Roulement à rouleaux coniques - Google Patents

Roulement à rouleaux coniques Download PDF

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Publication number
WO2022244872A1
WO2022244872A1 PCT/JP2022/020981 JP2022020981W WO2022244872A1 WO 2022244872 A1 WO2022244872 A1 WO 2022244872A1 JP 2022020981 W JP2022020981 W JP 2022020981W WO 2022244872 A1 WO2022244872 A1 WO 2022244872A1
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WO
WIPO (PCT)
Prior art keywords
diameter side
inner ring
tapered roller
small
roller bearing
Prior art date
Application number
PCT/JP2022/020981
Other languages
English (en)
Japanese (ja)
Inventor
雄太 西田
智仁 伊藤
靖之 井上
径生 堀
翔吾 福留
Original Assignee
Ntn株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ntn株式会社 filed Critical Ntn株式会社
Publication of WO2022244872A1 publication Critical patent/WO2022244872A1/fr

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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
    • 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
    • F16C19/36—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 a single row of rollers
    • 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
    • F16C33/46—Cages for rollers or needles
    • 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
    • F16C33/46—Cages for rollers or needles
    • F16C33/50—Cages for rollers or needles formed of interconnected members, e.g. chains
    • 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
    • F16C33/46—Cages for rollers or needles
    • F16C33/51—Cages for rollers or needles formed of unconnected members
    • 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
    • F16C33/46—Cages for rollers or needles
    • F16C33/56—Selection of substances
    • 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
    • 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
    • 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
    • F16C43/06—Placing rolling bodies in cages or bearings

Definitions

  • the present invention relates to tapered roller bearings used in general industrial machinery, and more particularly to tapered roller bearings that rotatably support large rotating shafts such as the main shafts of wind power generators with an outer diameter exceeding 1 m.
  • the tapered roller bearing 100 includes an inner ring 101, an outer ring 102 arranged concentrically around the outer circumference, and tapered rollers arranged between the inner ring 101 and the outer ring 102. 103 and a retainer 104 that retains the tapered rollers 103 at regular intervals in the circumferential direction.
  • the retainer 104 of the tapered roller bearing 100 is generally made of steel plate.
  • the steel plate retainer 104 deforms due to its own weight and the weight of the tapered rollers 103 held because the tapered rollers 103 are also large and used in large numbers.
  • the retainer 104 made of steel plate is usually manufactured by press working, but if the outer diameter exceeds 1 m, it becomes difficult to process due to equipment problems.
  • the strength of the retainer 104 made of steel plate can be ensured by increasing the plate thickness, it is generally difficult to press large parts due to problems with the manufacturing equipment, and processing is limited. There is a limit to the plate thickness that can be pressed from.
  • the retainer 104 is manufactured by cutting, the cost will increase significantly compared to the press product, and the material will be wasted.
  • each segment 104A is separated when the inner ring assembly is reversed.
  • the tapered rollers 103 are inserted into the pockets of the segment 104A from the inner diameter side and the outer diameter side. .
  • the connecting members such as wires that integrate the segments are left as they are, the connecting members may come off during operation of the tapered roller bearing 100, leading to failure. have a nature.
  • the present invention prevents segments of a segment retainer from coming apart and tapered rollers from falling out of pockets of the segments even when the inner ring assembly is reversed when the inner ring assembly is incorporated into the outer ring.
  • the present invention provides an inner ring, an outer ring arranged concentrically on the outer periphery thereof, a plurality of tapered rollers arranged between the inner ring and the outer ring, and tapered rollers held at regular intervals.
  • the inner ring has a raceway surface on which the tapered rollers roll on the outer circumference, and a large flange portion and a small flange portion with which the end surfaces of the tapered rollers contact on both sides in the axial direction sandwiching the raceway surface.
  • the cage is a segmented cage divided into a plurality of segments in the circumferential direction, and the segments are composed of a pair of small diameter side arcuate portions and large diameter side arcuate portions that are opposed to each other with a predetermined spacing, and the small diameter side and a plurality of columns extending between the arc-shaped portion and the large-diameter side arc-shaped portion.
  • each segment has at least three pockets in the circumferential direction, and each segment has at least three pockets in the circumferential direction.
  • Pockets located at positions other than the ends are provided with guide claws on the outer diameter side of the opposing pillars so that the tapered rollers can be inserted into the pockets from the inner diameter side of the segment.
  • a guide pawl is provided on the inner diameter side of the column to allow the tapered rollers to be inserted into the pocket from the outer diameter side, and a drop-off prevention member is provided to prevent the tapered rollers accommodated in the pockets at both ends from falling off to the outer diameter side.
  • a connecting member and an engaging portion for the connecting member are provided on the large-diameter side surface of the large-diameter arc-shaped portion of the segment; and the connecting member is detachably attached to the engaging portion. It is characterized by connecting each segment arranged annularly by engaging.
  • the fall-off prevention members are provided along the outer diameter surfaces of the pillars located at both ends of the segment, and are detachably fixed.
  • a drop-off prevention member fixing portion that allows the drop-off prevention member to be axially attachable and detachable is provided near the circumferential end portion of the outer diameter surface of at least one of the small-diameter side arc-shaped portion and the large-diameter side arc-shaped portion of the segment.
  • the fall-off prevention member is inserted into the fall-off prevention member fixing portion from the inner ring large end surface side, and the fall-off prevention member has a structure engaging with the inner ring big end surface.
  • the portion is provided with a guide portion for the connecting member.
  • the drop-off prevention member fixing portions are formed in a groove shape that opens toward adjacent segments, and one drop-off prevention member fixing portion is common to the opposing groove-shaped drop-off prevention member fixing portions of the adjacent segments.
  • the prevention member may prevent the tapered rollers accommodated in the pockets at both ends of the adjacent segments from coming off toward the outer diameter side.
  • the ends of the connecting member are connected by a fastening portion or a fastening member.
  • a wing portion protruding toward the small diameter side is provided on the small diameter side surface of the small diameter arcuate portion, and when the large diameter sides of the annularly arranged segments are connected by a connection member, the small diameter side of each annularly arranged segment is provided with a wing portion that protrudes toward the small diameter side. It is preferable to fit an annular jig to the wing portion.
  • protrusions having the engaging portions on both end sides of the large-diameter side surface of the segment's large-diameter arc-shaped portion.
  • the angle of the large flange portion of the inner ring that contacts the large diameter side end surface of the tapered roller with respect to the straight line orthogonal to the central axis of the inner ring is I
  • the chamfered width of the tip of the large flange is H
  • the distance from the central axis of the inner ring to the center of gravity of the tapered roller is y1
  • the diameter of the large flange is J
  • the diameter of the large flange is should satisfy the following conditions:
  • the diameter of the small flange portion of the inner ring is M, and the small flange portion of the inner ring that contacts the small diameter side end surface of the tapered roller is the center of the inner ring in a state in which the adjacent segments are connected by the connecting member and abutted against each other and fixed.
  • the angle with respect to a straight line perpendicular to the axis is L
  • the chamfer width of the tip of the small flange is K
  • the side surface of the small flange and The height of the small flange satisfies the following condition, where y3 is the distance from the contact point C where the tapered roller contacts the small-diameter end face to the central axis.
  • the annular jig can be removed before the inner ring assembly, which integrates the inner ring, tapered rollers and retainer, is assembled into the outer ring.
  • the first segment means the segment that is arranged first when a plurality of segments are sequentially arranged in a row in the circumferential direction
  • the last segment means that the adjacent segments are brought into contact and sequentially arranged in the circumferential direction. This is the segment that is arranged last when arranged in a row.
  • a plurality of retainer segments are connected in the circumferential direction and incorporated into the tapered roller bearing to form one annular retainer.
  • the segments are made of resin.
  • the linear expansion coefficient of the resin is 1.7 ⁇ 10 ⁇ 5 /° C. or less.
  • polyether ether ketone containing carbon fiber, glass fiber, or carbon black as a filler can be used as the resin forming the segments.
  • the filling ratio of the filler in the resin is 20% by weight or more and 40% by weight or less, and the gap in the circumferential direction between the segments is within the range described above. , deformation or the like due to tension between the segments in the circumferential direction can be prevented.
  • the connecting member may be divided into a plurality of parts, and the ends of each divided connecting member may be connected by the fastening portion or the fastening member. It is preferable that the plurality of fastening portions or fastening members are equally spaced in a circumferential manner.
  • a small-diameter side connecting member and a small-diameter side engaging portion for the small-diameter side connecting member are provided on the small-diameter side surface of the small-diameter arc-shaped portion, and the small-diameter side connecting member is detachably engaged with the small-diameter side engaging portion. You may make it connect each segment arrange
  • the tapered roller bearing according to the present invention when the inner ring assembly in which the inner ring, the tapered rollers, and the retainer are integrated is incorporated into the outer ring, even if the inner ring assembly is reversed, the large diameter sides of the annularly arranged segments are connected. Since each segment is connected by a member, it does not come apart.
  • the pockets located at positions other than the ends in the circumferential direction of each segment are provided with guide claws on the outer diameter side of the column portion, and the tapered rollers are inserted into the pocket from the inner diameter side of the segment. Therefore, even if the inner ring assembly is reversed, the tapered rollers will not fall out of the pocket.
  • the pockets positioned at the ends in the circumferential direction of each segment are provided with guide claws on the inner diameter side of the opposing pillars so that the tapered rollers can be inserted into the pocket from the outer diameter side.
  • fall-off prevention members for preventing the tapered rollers housed in the pockets at both ends from falling out toward the outer diameter side are provided on the outer diameter surfaces of at least one of the small-diameter side arc-shaped portion and the large-diameter side arc-shaped portion at both circumferential ends.
  • the segment retainer serves as a rolling element guide.
  • the connecting member on the large diameter side of each segment arranged in an annular shape is connected by a fastening portion or a fastening member. It can be removed, and it is possible to prevent the connecting member from coming off during operation and causing a failure.
  • Fall-off prevention members for preventing the tapered rollers accommodated in the pockets at both ends from falling off toward the outer diameter side are also provided on the outer diameter surfaces of at least one of the small-diameter side arc-shaped portion and the large-diameter side arc-shaped portion on both circumferential ends. Since it is provided so that it can be inserted into and pulled out from the large end face of the inner ring with respect to the fixing portion of the preventing member, the inner ring assembly can be pulled out after being incorporated into the outer ring.
  • FIG. 1 is a cross-sectional view showing an embodiment of a tapered roller bearing according to the present invention
  • FIG. FIG. 2 is a plan view showing segments of a segment retainer used in the tapered roller bearing of FIG. 1
  • FIG. 2 is a perspective view showing segments of a segment retainer used in the tapered roller bearing of FIG. 1
  • FIG. 2 is a cross-sectional view of a segment of a segment cage used in the tapered roller bearing of FIG. 1
  • FIG. 3 is a cross-sectional view showing another example of segments of a segment retainer used in the tapered roller bearing of FIG. 1
  • 2 is a perspective view showing a state in which an outer ring of the tapered roller bearing of FIG. 1 is removed;
  • FIG. 2 is a front view of the tapered roller bearing of FIG. 1 with the outer ring removed;
  • FIG. FIG. 3 is a perspective view showing the direction in which tapered rollers are inserted into the segment of FIG. 2;
  • FIG. 2 is a perspective view showing an assembly procedure of the tapered roller bearing of FIG. 1;
  • FIG. 10 is a perspective view of the assembling procedure of FIG. 9 as seen from another angle;
  • FIG. 2 is a perspective view showing an inserting direction of a drop-off preventing member in an assembling procedure of the tapered roller bearing of FIG. 1;
  • FIG. 12 is a perspective view showing a state in which the anti-falling member is inserted from the state shown in FIG. 11;
  • FIG. 5 is a schematic diagram showing the relationship between the tapered rollers and the large flange portion of the inner ring when the tapered rollers are arranged on the inner ring with the large end surface of the inner ring facing downward.
  • FIG. 3 is a partial perspective view showing a state before binding of connecting members in the procedure for assembling the tapered roller bearing of FIG. 1 ;
  • FIG. 3 is a partial perspective view showing a state after binding connecting members in the procedure for assembling the tapered roller bearing of FIG. 1 ;
  • FIG. 16 is a cross-sectional view of FIG. 15;
  • FIG. 17 is a cross-sectional view of the state of FIG. 16 with the annular jig removed;
  • FIG. 5 is a cross-sectional view showing a state in which the inner ring assembly is reversed and incorporated into the outer ring;
  • FIG. 4 is a cross-sectional view showing a state in which the inner ring assembly is incorporated into the outer ring;
  • FIG. 4 is a schematic diagram showing a rotating state of tapered rollers arranged on the raceway surface of the inner ring;
  • FIG. 5 is a schematic diagram showing the relationship between the height of the small flange portion of the inner ring and the tapered rollers when the tapered rollers arranged on the raceway surface of the inner ring are rotated.
  • FIG. 5 is a cross-sectional view showing another embodiment of a tapered roller bearing according to the present invention;
  • FIG. 4 is a perspective view showing another embodiment of a tapered roller bearing according to the present invention
  • FIG. 2 is a cross-sectional view of a conventional tapered roller bearing
  • FIG. 10 is a perspective view showing a state in which tapered rollers are inserted into segments that constitute retainer segments used in a conventional tapered roller bearing. It is a sectional view showing an assembly procedure of a conventional tapered roller bearing.
  • a tapered roller bearing 1 as shown in FIG. It has rollers 15 and a retainer 17 having pockets 16 that retain the tapered rollers 15 at regular intervals.
  • the outer ring 12 has a raceway surface 14 on which the tapered rollers 15 roll on its inner circumference.
  • the inner ring 11 has a raceway surface 13 on which the tapered rollers 15 roll on its outer circumference, and a large flange portion 19 and a small flange portion 18 on both sides of the raceway surface 13 in the axial direction with which the end surfaces of the tapered rollers 15 come into contact. .
  • the average diameter of the tapered rollers 15 is 40 mm or more, and the outer diameter of the bearing is 1 m or more.
  • the retainer 17 is a segmented retainer consisting of a plurality of segments 20, as shown in FIG.
  • the segment 20 includes a pair of small-diameter arcuate portion 21 and large-diameter arcuate portion 22 facing each other with a predetermined distance therebetween, and the small-diameter arcuate portion 21 and large-diameter arcuate portion 22.
  • a space surrounded by two adjacent pillars 23, a small-diameter arc-shaped portion 21, and a large-diameter arc-shaped portion 22 is defined as a pocket 16 for accommodating the tapered rollers 15. I have to.
  • Three or more pockets 16 for accommodating tapered rollers 15 are provided in one segment 20 in the circumferential direction.
  • six pillars 23 are provided in one segment 20, and five pockets 16 for accommodating tapered rollers 15 are provided between adjacent pillars 23. As shown in FIG.
  • a guide pawl 24 is provided to prevent the tapered roller 15 from coming out radially, so that the tapered roller 15 can be inserted into the pocket 16 from the radially inner side of the segment 20 as shown in FIG.
  • the pockets 16 located at the ends in the circumferential direction are provided with guide claws 24 on the inner diameter side of the facing column portions 23 to allow the tapered rollers 15 to be inserted into the pocket from the outer diameter side, and are accommodated in the pockets 16 at both ends.
  • the falling off of the tapered rollers 15 toward the outer diameter side is prevented by the falling-off prevention members 32 provided along the outer diameter surfaces of the column portions 23 positioned at both ends of the segment 20 .
  • the drop-off prevention member 32 can be inserted into and removed from the drop-off prevention member fixing portions 33 provided on the outer diameter surfaces of both circumferential ends of the small-diameter side arc-shaped portion 21 and the large-diameter side arc-shaped portion 22 from the large end surface side of the inner ring 11 . ing.
  • the pocket 16 positioned at the end in the circumferential direction is provided with a guide claw 24 on the inner diameter side of the column portion 23.
  • the tapered rollers 15 make the cage 17 a rolling element guide.
  • a drop-off preventing member fixing portion 33 is provided in which the drop-off preventing member 32 is provided on both outer diameter surfaces of the small diameter side arc-shaped portion 21 and the large diameter side arc-shaped portion 22.
  • a structural portion 34 is provided that engages with the large end surface of the inner ring 11 in a state where it is inserted from the large end surface side of the inner ring 11 .
  • the surface of the drop-off prevention member 32 that contacts the tapered rollers 15 is formed as an R surface.
  • the drop-off prevention member fixing portions 33 provided on the outer diameter surfaces on both end sides of the small diameter side arc-shaped portion 21 and the large diameter side arc-shaped portion 22 are holes through which the drop-off prevention member fixing portions 33 are inserted, as shown in FIGS. 5, it may be formed in a groove shape opening toward the adjacent segments 20, as shown in FIG.
  • the drop-off prevention member fixing portions 33 are formed in groove shapes that are open to each other as shown in FIG.
  • the drop-off prevention member 32 is inserted, and this one common drop-off prevention member 32 can prevent the tapered rollers 15 accommodated in the pockets 16 at both ends of the adjacent segments 20 from falling off toward the outer diameter side. This will reduce the number of parts.
  • the segment 20 is annularly arranged with the end faces of the small-diameter arcuate portion 21 and the large-diameter arcuate portion 22 facing each other.
  • a projecting portion 26 having an engaging portion 27 of a connecting member 25 arranged on the large-diameter side of each segment 20 arranged in an annular shape is provided as a shaft. It is provided so as to protrude in the direction.
  • the protrusions 26 on both ends of the large-diameter side surfaces of the large-diameter arc-shaped portions 22 of the segments 20 are preferably provided so as to avoid contact between the protrusions 26 between adjacent segments 20 .
  • a groove-shaped guide portion 35 is provided.
  • a wing portion 28 projecting toward the small diameter side is provided on the small diameter side surface of the small diameter arc portion 21 of the segment 20, and when the large diameter sides of the segments 20 arranged in an annular shape are bound by the connecting member 25, the wing portion 28 shown in FIG. And as shown in FIG. 16, an annular jig 31 is fitted to the wing portion 28 on the small diameter side of each segment 20 arranged in an annular shape to suppress the widening of the small diameter side of the segment 20 due to tightening of the connecting member 25 .
  • the annular jig 31 includes a ring portion 31a that abuts against the end surface of the inner ring 11 on the small diameter side, and a ring portion 31a that protrudes toward the outer diameter side from the axial end portion of the ring portion 31a.
  • the engaging portion 31b is fitted to the wing portion 28 of the segment 20 while the ring portion 31a is in contact with the end face of the inner ring 11 on the small diameter side.
  • the end of the connecting member 25 wound around the large diameter side of each segment 20 is bound by a fastening member 30 such as a turnbuckle.
  • a fastening member 30 such as a turnbuckle
  • the fastening member 30 has a body portion having a female threaded portion, and by screwing the male threaded portion provided at the end of the connecting member 25 into the body portion of the turnbuckle, the connecting member 25 is tightened.
  • the ends can be connected to each other.
  • tension can be applied to the connecting member 25, and by rotating the body in the direction opposite to the tightening direction, the binding of both ends of the connecting member 25 can be released.
  • a wire or belt can be used as the connecting member 25 .
  • a detachable hook or turnbuckle can be used as the fastening member 30.
  • FIG. The turnbuckle is most preferable because it is detachable, the tightening force does not loosen, and the tightening force is adjustable.
  • a belt is used as the connecting member 25, it is preferable to use a detachable buckle as the fastening member 30 because the tightening force does not loosen.
  • the segment 20 is made of resin or steel.
  • resin forming the segment 20 polyetheretherketone containing carbon fiber or polyetheretherketone containing glass fiber can be used.
  • the tapered roller bearing 1 using the segment 20 is assembled as follows.
  • the tapered rollers 15 may fall off the inner ring 11 due to their own weight.
  • the distance from the central axis of the inner ring 11 to the tip of the large flange portion 19 is made larger than the distance from the central axis of the inner ring 11 to the center of gravity of the tapered rollers 15 .
  • the diameter J of the large collar portion 19 satisfies the following equation.
  • the side surface of the large flange portion 19 of the inner ring 11 that contacts the tapered rollers 15 is The angle with respect to a straight line perpendicular to the central axis of the inner ring 11 is I, the chamfered width of the tip of the large flange portion 19 is H, the distance from the central axis of the inner ring 11 to the center of gravity of the tapered roller 15 is y1, and the diameter of the large flange portion 19 is y1.
  • D is the diameter of the large end surface of the tapered roller
  • G is the diameter of the small end surface of the tapered roller
  • F is the length of the tapered roller
  • E is the large collar portion 19 extending from the central axis to the raceway surface 13. It shows the distance to the edge of the side.
  • the tapered rollers 15 are previously inserted into the pockets 16 positioned at the ends of the segment 20 from the outer diameter side, and the segment 20 is inserted into the tapered rollers 15 as shown in FIGS. tapered rollers 15 are inserted into the three central pockets 16 from the inner diameter side of the segment 20. As shown in FIG. 8, the tapered rollers 15 are previously inserted into the pockets 16 positioned at the ends of the segment 20 from the outer diameter side, and the segment 20 is inserted into the tapered rollers 15 as shown in FIGS. tapered rollers 15 are inserted into the three central pockets 16 from the inner diameter side of the segment 20. As shown in FIG.
  • the falling prevention members 32 for preventing the tapered rollers 15 housed in the pockets 16 at both ends of the segment 20 from falling toward the outer diameter side are attached to the small diameter side arcuate portion 21 and the large diameter side arcuate portion 21 .
  • an L-shaped annular jig 31 is fitted to the wing portion 28 protruding from the small-diameter side surface of the segments 20 arranged in a ring shape, and the protruding portion 26 protruding from the large-diameter side surface is attached.
  • the connecting member 25 is passed through the guide portion 35 of the structural portion 34 that engages with the engaging portion 27 and the large end surface of the inner ring, and the ends of the connecting member 25 wound around the outer diameter side of the segment 20 are connected to each other as a fastening portion or a fastening member.
  • the segments 20 are bound by 30 and the connecting members 25 are tightened by the fastening portions or fastening members 30 to integrate the plurality of segments 20 arranged in an annular shape.
  • the fastening portion or fastening member 30 is positioned between the projections 26 projecting to both ends of the large diameter side surface of the large diameter side arc-shaped portion 22 , and the fastening portion or fastening member 30 is located between the projections 26 on both end sides. It has become a containment unit.
  • the connecting member 25 may be a single piece continuous in the circumferential direction, but it is divided into a plurality of pieces in the circumferential direction, and the ends of each of the divided connecting members 25 are bound together by fastening portions or fastening members 30, respectively. good too.
  • the connecting member 25 is divided into a plurality of pieces, it is preferable that the fastening portions or the fastening members 30 are equally divided in the circumference.
  • the annular jig 31 is axially placed over the wing portions 28 of the small-diameter side arcuate portions 21 of the segments 20 arranged annularly. It can be removed by moving along (Fig. 17).
  • this inner ring assembly can be incorporated into the outer ring 12 by turning the inner ring assembly so that the smaller diameter side faces downward.
  • the tapered rollers 15 inserted into the pockets 16 of the segments 20 do not slip out of the pockets 16 at the three central locations due to the guide claws 24 provided on the outer diameter side of the pillars 23 .
  • the tapered rollers 16 inserted from the outer diameter side into the pockets 16 at the ends of the segments 20 are prevented from slipping out to the outer diameter side by the drop-off preventing member 32 .
  • the annular jig 31 used when assembling the inner ring assembly should be removed when incorporating it into the outer ring 12.
  • the height of the small flange portion 18 of the inner ring 11 that prevents the segments 20 from coming off satisfies the following conditions.
  • the point C on the side surface of the small flange portion 18 where the tapered roller 15 is hooked is a spline curve depicting the trajectory of the small end face corner portion of the tapered roller 15 when the tapered roller 15 rotates and the small flange.
  • the diameter M of the small flange portion 18 of the inner ring 11 satisfies the following conditions.
  • M is the diameter of the small flange portion 18 of the inner ring 11
  • L is the angle of the side surface of the small flange portion 18 of the inner ring 11 on the point C side with respect to the straight line perpendicular to the central axis of the inner ring 11
  • L is the angle of the small flange portion 18.
  • the tapered roller bearing 1 can be assembled as shown in FIG.
  • the segments 20 will not come apart even if the connecting member 25 tightening the outer circumference of each segment 20 is removed by loosening the fastening portion or the fastening member 30. Therefore, the connecting member 25 can be removed after the tapered roller bearing 1 is installed in the device.
  • the anti-falling member 32 can also be pulled out from the fixing portion 33 of the anti-falling member.
  • the wing portion 28 protruding toward the small diameter side is provided on the small diameter side surface of the small diameter arc portion 21, and when the large diameter sides of the segments 20 arranged in an annular shape are bound by the connecting member 25, they are formed into an annular shape.
  • An L-shaped annular jig 31 is fitted to the wing portion on the small diameter side of each arranged segment 20.
  • a small-diameter side engaging portion 36 is provided, and a connecting member 37 wound around the small-diameter side of each segment arranged in an annular shape is passed through the small-diameter side engaging portion 36, and the ends of the connecting member 37 are connected to each other as fastening portions or
  • the annular jig 31 may not be used by detachably binding with a fastening member (not shown).
  • the structure 34 that engages the large end surface of the inner ring of the drop-off prevention member 32 has a groove shape in which the connecting member 25 that is wound around the large diameter side of each of the segments 20 that are arranged in an annular shape engages.
  • the guide portion 35 is provided, the shape of this guide portion 35 may be a hole shape through which the connecting member 25 passes, as in the embodiment shown in FIG.

Landscapes

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

Abstract

L'invention concerne un roulement à rouleaux coniques ayant une structure telle que lors de l'incorporation d'un ensemble bague interne dans une bague externe, même si l'ensemble bague interne est inversé, des segments dans un support de segment ne se dispersent pas, et des rouleaux coniques ne tombent pas de poches dans les segments. Les poches (16) positionnées aux extrémités dans la direction circonférentielle parmi les poches (16) recevant respectivement les rouleaux coniques (15), sont pourvues de griffes de guidage (24) sur le côté diamètre externe de sections colonnes opposées de telle sorte que les rouleaux coniques (15) respectifs peuvent être insérés à partir du côté diamètre interne. Les poches (16) positionnées aux extrémités dans la direction circonférentielle sont pourvues de griffes de guidage (24) sur le côté diamètre interne des sections colonnes (23) opposées de telle sorte que les rouleaux coniques (15) respectifs peuvent être insérés à partir du côté diamètre externe. Des éléments de prévention de chute (32), qui empêchent les rouleaux coniques (15) respectivement reçus dans les poches (16) aux deux extrémités de tomber sur le côté diamètre externe, sont disposés de façon à pouvoir être insérés et retirés du côté grande surface d'extrémité d'une bague interne (11). Un élément de raccordement (25) destiné à être enroulé autour du côté grand diamètre de chacun des segments (20) disposés en forme d'anneau est passé à travers des parties de mise en prise (27) sur la surface latérale côté grand diamètre d'une section arquée (22) côté grand diamètre de chacun des segments (20), et y est fixé.
PCT/JP2022/020981 2021-05-20 2022-05-20 Roulement à rouleaux coniques WO2022244872A1 (fr)

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JP2021085703 2021-05-20
JP2021-085703 2021-05-20

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WO2022244872A1 true WO2022244872A1 (fr) 2022-11-24

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Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024106182A1 (fr) * 2022-11-18 2024-05-23 Ntn株式会社 Palier à roulement

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011208700A (ja) * 2010-03-29 2011-10-20 Ntn Corp 転がり軸受
US20120167391A1 (en) * 2009-09-11 2012-07-05 The Timken Company Snap-on cage bridge for rolling element bearings
WO2014136816A1 (fr) * 2013-03-08 2014-09-12 Ntn株式会社 Cage de roulement à rouleaux
US20150043863A1 (en) * 2011-12-19 2015-02-12 Aktiebolaget Skf Bearing cage, bearing cage segment, and method for assembling the bearing cage
WO2016147808A1 (fr) * 2015-03-16 2016-09-22 Ntn株式会社 Dispositif de retenue pour roulement à rouleaux coniques
WO2018092612A1 (fr) * 2016-11-16 2018-05-24 Ntn株式会社 Dispositif de retenue pour palier à rouleaux coniques
US20190203772A1 (en) * 2017-12-14 2019-07-04 Aktiebolaget Skf Cage segment for a rolling-element bearing cage

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120167391A1 (en) * 2009-09-11 2012-07-05 The Timken Company Snap-on cage bridge for rolling element bearings
JP2011208700A (ja) * 2010-03-29 2011-10-20 Ntn Corp 転がり軸受
US20150043863A1 (en) * 2011-12-19 2015-02-12 Aktiebolaget Skf Bearing cage, bearing cage segment, and method for assembling the bearing cage
WO2014136816A1 (fr) * 2013-03-08 2014-09-12 Ntn株式会社 Cage de roulement à rouleaux
WO2016147808A1 (fr) * 2015-03-16 2016-09-22 Ntn株式会社 Dispositif de retenue pour roulement à rouleaux coniques
WO2018092612A1 (fr) * 2016-11-16 2018-05-24 Ntn株式会社 Dispositif de retenue pour palier à rouleaux coniques
US20190203772A1 (en) * 2017-12-14 2019-07-04 Aktiebolaget Skf Cage segment for a rolling-element bearing cage

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