WO2015104946A1 - スラストころ軸受の保持器、およびその製造方法 - Google Patents
スラストころ軸受の保持器、およびその製造方法 Download PDFInfo
- Publication number
- WO2015104946A1 WO2015104946A1 PCT/JP2014/082828 JP2014082828W WO2015104946A1 WO 2015104946 A1 WO2015104946 A1 WO 2015104946A1 JP 2014082828 W JP2014082828 W JP 2014082828W WO 2015104946 A1 WO2015104946 A1 WO 2015104946A1
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- WIPO (PCT)
- Prior art keywords
- cage
- roller bearing
- retainer
- thrust roller
- region
- Prior art date
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
- F16C33/46—Cages for rollers or needles
- F16C33/54—Cages for rollers or needles made from wire, strips, or sheet metal
- F16C33/542—Cages for rollers or needles made from wire, strips, or sheet metal made from sheet metal
- F16C33/543—Cages for rollers or needles made from wire, strips, or sheet metal made from sheet metal from a single part
- F16C33/546—Cages for rollers or needles made from wire, strips, or sheet metal made from sheet metal from a single part with a M- or W-shaped cross section
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D53/00—Making other particular articles
- B21D53/10—Making other particular articles parts of bearings; sleeves; valve seats or the like
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D53/00—Making other particular articles
- B21D53/10—Making other particular articles parts of bearings; sleeves; valve seats or the like
- B21D53/12—Making other particular articles parts of bearings; sleeves; valve seats or the like cages for 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
- F16C19/30—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 axial load mainly
- F16C19/305—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 axial load mainly consisting of rollers held in a cage
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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
- F16C19/463—Needle bearings with one row or needles consisting of needle rollers held in a cage, i.e. subunit without race 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
- 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
- F16C33/54—Cages for rollers or needles made from wire, strips, or sheet metal
- F16C33/541—Details of individual pockets, e.g. shape or roller retaining means
Definitions
- the present invention relates to a thrust roller bearing retainer (hereinafter sometimes simply referred to as “retainer”) and a method for manufacturing the same, and more particularly to a thrust roller bearing retainer manufactured using a press, and It relates to the manufacturing method.
- retainer a thrust roller bearing retainer
- a thrust roller bearing that receives a thrust load may be disposed at a location where a thrust load is applied in an automatic transmission for an automobile, a compressor for a car air conditioner, or the like.
- Such thrust roller bearings are desired to reduce the rotational torque of the bearings from the viewpoint of reducing fuel consumption and saving labor.
- the thrust roller bearing includes a bearing ring disposed in the rotation axis direction, a plurality of needle rollers that roll on the raceway surface of the bearing ring, and a cage that holds the plurality of needle rollers.
- the cage may be manufactured by bending a steel plate and then removing a pocket to accommodate the rollers.
- Patent Document 1 Japanese Patent Application Laid-Open No. 10-220482
- Patent Document 2 Japanese Patent No. 4706715
- Patent Document 1 it is described that the thrust roller bearing retainer is provided with a convex portion that protrudes in the inner diameter direction from the pocket end surface located near the outer diameter of the annular main body and contacts the outer peripheral side end surface of the roller. There is. There is also a description that this convex portion comes into contact with the vicinity of the center portion of the roller to guide the roller in the radial direction, thereby reducing the rotational torque of the bearing and improving the wear resistance of the cage.
- Patent Document 1 does not disclose any method for forming such a convex portion.
- Patent Document 2 in a method for manufacturing a thrust roller bearing retainer, a convex portion for pivotally supporting a roller on the inner wall surface of the pocket is formed simultaneously with the punching of the pocket.
- the thrust roller bearing cage manufacturing method disclosed in Patent Document 2 has the following problems. Since the thrust roller bearing cage disclosed in Patent Document 2 has a configuration in which a convex portion for pivotally supporting the roller is provided on the inner wall surface of the pocket, there is a possibility that the cage cannot be accommodated when the thickness of the cage is thin. is there. Specifically, for example, the roller diameter is less than ⁇ 3 mm and is relatively small, and the roller length / roller diameter value, which is a ratio of the roller length to the diameter, is a so-called small diameter short and small. When the rollers are accommodated in the pockets, the end surfaces of the rollers and the above-described convex portions cannot be brought into appropriate contact unless the thickness of the cage is made thinner than before. Such a measure may lead to a significant decrease in the strength of the cage. That is, in the technique disclosed in Patent Document 2, there is a possibility that a problem may occur when using small diameter short rollers, and such a case cannot be dealt with.
- An object of the present invention is to provide a cage for a thrust roller bearing having good performance.
- Another object of the present invention is to provide a method of manufacturing a cage for a thrust roller bearing, which can efficiently manufacture a cage for a thrust roller bearing with good performance.
- the cage of the thrust roller bearing according to the present invention is a cage of a thrust roller bearing provided in the thrust roller bearing and provided with a plurality of pockets for accommodating the rollers, wherein the outer diameter side region of the cage is defined as the inner diameter. It is formed so as to be bent to the side, and has a protruding portion that protrudes toward the inner diameter side in the region on the outer diameter side of the pocket and contacts the roller end surface.
- region which contacts a roller end surface among protrusion parts is surface-pressed.
- the region of the projecting portion that contacts the roller end surface is subjected to surface pressing, so that the roller end surface slides between the roller end surface of the projecting portion and the region that contacts the roller end surface during rotation of the bearing.
- This can reduce the interruption of the oil film. If it does so, the lubricity of this contact area
- the surface pressing process means that the protruding portion is extended in the diameter increasing direction by using the outer diameter surface of the mold that acts as a stopper for regulating the amount of collapse during the outer diameter bending process.
- pressurizing it means the process of smoothing the surface roughness before and after the process.
- the press shear surface or fractured surface formed during the outer shape forming process is smoothed to an arithmetic average roughness Ra (JIS B 0601) of about 2 ⁇ m or less by surface pressing. it can.
- an engaging portion for alignment when forming the protruding portion may be provided.
- a protrusion part when forming a protrusion part, a protrusion part can be formed in an appropriate location using the engaging part for alignment. If it does so, a protrusion part can be formed accurately.
- the protruding portion since the protruding portion is formed by bending the outer diameter side region of the cage to the inner diameter side, the protruding portion can be appropriately formed regardless of the size of the roller.
- the engaging portion may be configured to be a pilot hole.
- the protruding portion may be formed so that the outer diameter side region of the cage is bent obliquely toward the inner diameter side.
- a method for manufacturing a cage for a thrust roller bearing is a method for manufacturing a cage for a thrust roller bearing provided in the thrust roller bearing and provided with a plurality of pockets for accommodating the rollers.
- a cage material preparation step for preparing a cage material to be a cage later, and a projection that projects toward the inner diameter side in the region on the outer diameter side of the pocket to form a projecting portion that contacts the roller end surface with respect to the cage material A part forming step, a pocket forming step for forming a pocket with respect to the cage material, and an outer diameter region bending step for folding an outer diameter side region of the cage material after the protruding portion forming step and the pocket forming step;
- the pocket forming step is formed using the engaging portion formed in the engaging portion forming step.
- the roller material protrudes toward the inner diameter side in the outer diameter side region of the pocket using the engaging portion formed in the engaging portion forming step. Since the protrusion part which contacts an end surface is formed, positioning at the time of forming a protrusion part can be performed appropriately. Further, in the pocket forming step, the pocket is formed on the cage material by using the engaging portion formed in the engaging portion forming step, so that the positioning when forming the pocket can be performed appropriately. That is, in the positional relationship between the formed protrusion and the formed pocket, the protrusion can be formed with high accuracy and efficiency. And about the cage
- the engaging portion forming step may be configured to be a step of forming a pilot hole penetrating the cage material in the plate thickness direction.
- the engaging portion forming step may be configured to be a step of forming the engaging portion in a region on the inner diameter side from the pocket.
- the cage material may be configured to include an uneven shape forming step for forming an uneven shape in the plate thickness direction.
- the concavo-convex shape forming step may include a drawing process for the cage material.
- the protruding portion forming step may be configured to be a step of punching the cage material so as to form the protruding portion and forming the outer shape.
- It may be configured to be manufactured using a transfer press.
- the region of the projecting portion that comes into contact with the roller end surface is subjected to surface pressing, so that the roller end surface of the projecting portion and the roller end surface of the projecting portion
- the oil film can be prevented from being interrupted by sliding with the contact area. If it does so, the lubricity of this contact area
- the surface pressing process is performed on the region of the protruding portion formed in the protruding portion forming step in contact with the roller end surface.
- the oil film can be reduced from being interrupted by sliding between the roller end surface and the region of the protruding portion that contacts the roller end surface. If it does so, the lubricity of this contact area
- Such a cage has a good performance because it can reduce the rotational torque of the bearing. Therefore, according to such a method of manufacturing a thrust roller bearing retainer, it is possible to efficiently manufacture a thrust roller bearing retainer with good performance.
- FIG. 1 is a view showing a part of a cage 11 of a thrust roller bearing according to an embodiment of the present invention.
- FIG. 1 is a view of the cage 11 as seen from the rotation axis direction of the cage 11.
- FIG. 2 is a sectional view of the cage 11 of the thrust roller bearing shown in FIG.
- FIG. 2 shows a case of cutting along a section indicated by II-II in FIG. Specifically, a cross section of a portion where a pocket described later is formed in the right region of FIG. 2 is shown, and a cross section of a portion where a column portion described later is formed in the left region of FIG.
- II-II a cross section of a portion where a pocket described later is formed in the right region of FIG. 2
- FIG. 3 is an enlarged sectional view showing a part of the cage 11 of the thrust roller bearing shown in FIG.
- FIG. 3 is an enlarged cross-sectional view of a region indicated by III in FIG. 2 and 3, the rotation axis 12 of the cage 11 is indicated by a one-dot chain line.
- FIG. 3 one of a pair of track rings 14 and 15 arranged on both sides of the needle roller 13 accommodated in a pocket 21 described later and the rotating shaft direction of the retainer 11. The part is illustrated.
- the front and back direction of the paper surface in FIG. 1 and the vertical direction of the paper surface in FIGS. 2 and 3 are the rotation axis direction of the cage 11. Further, the direction of the direction or vice versa indicated by the arrow A 1 in FIG.
- the upper side in FIG. 2 and FIG. 3 is the upper side in the axial direction. That is, the direction indicated by arrow A 2 in FIG. 2 and FIG. 3, the upward direction. Further, the horizontal direction in FIG. 2 and FIG. 3 is the radial direction. Direction indicated by arrow A 3 in FIG. 3, the outer diameter direction.
- the thrust roller bearing retainer 11 has a disk shape, and a through hole 22 is provided in a central region thereof so as to penetrate straight in the thickness direction.
- a rotation shaft (not shown) is disposed in the through hole 22.
- the retainer 11 is provided at intervals in the circumferential direction so as to form a pair of annular portions 23 and 24 having different diameters and a pocket 21 that accommodates the needle rollers 13. And a plurality of column portions 25 to be connected. In this case, although a part of the illustration is omitted, the retainer 11 is provided with 28 pockets 21 and 28 column portions 25.
- the pocket 21 has a substantially rectangular shape when viewed from the axial direction.
- the pockets 21 are arranged radially about the rotation axis 12 of the cage 11.
- an upper roller stopper 26 that prevents the needle rollers 13 accommodated in the pocket 21 from falling off in the axial direction and an axial direction of the needle rollers 13 accommodated in the pocket 21.
- Lower roller stoppers 27 and 28 are provided to prevent falling off.
- the upper roller stopper 26 is provided at the center in the radial direction of the pocket 21.
- the lower roller stopper 27 is provided on the inner diameter side of the pocket 21, and the lower roller stopper 28 is provided on the outer diameter side of the pocket 21.
- the upper roller stopper 26 and the lower roller stoppers 27 and 28 are provided on the side wall surfaces on both sides in the circumferential direction of the pocket 21 so as to protrude toward the pocket 21.
- the needle rollers 13 are accommodated so as to be pushed into the pockets 21.
- the shape of the end face of the needle roller 13, specifically, the end face 16 located on the bearing outer side and the end face 17 located on the bearing inner side is flat.
- the retainer 11 is formed with a concavo-convex shape obtained by bending a plate material by bending it several times in the thickness direction.
- the retainer 11 includes four disk portions 31, 32, 33, and 34 that extend in the radial direction, and four cylindrical portions 36, 37, 38, and 39 that extend in the axial direction.
- the four disc portions 31 to 34 have an inner diameter in the order of the first disc portion 31, the second disc portion 32, the third disc portion 33, and the fourth disc portion 34 from the inner diameter side. Is configured to be large.
- the four cylindrical portions 36 to 39 are arranged in the order of the first cylindrical portion 36, the second cylindrical portion 37, the third cylindrical portion 38, and the fourth cylindrical portion 39 from the inner diameter side.
- the first cylindrical part 36 and the second cylindrical part 37 are configured to extend straight in the axial direction.
- the third cylindrical portion 38 is configured to be slightly inclined so that the inner diameter side portion is located on the lower side in the axial direction than the outer diameter side portion.
- the fourth cylindrical portion 39 located on the outermost diameter side is configured to be slightly inclined so that the inner diameter side portion is located on the upper side in the axial direction than the outer diameter side portion.
- the above-described upper roller stopper 26 is provided on the third disk portion 33.
- the lower roller stopper 27 is provided in the second disc portion 32, and the lower roller stopper 28 is provided in the fourth disc portion 34.
- the annular portion 23 on the inner diameter side includes the first disc portion 31, a part of the second disc portion 32, the first cylindrical portion 36, and the second cylindrical portion 37. Further, the annular portion 24 on the outer diameter side described above includes a part of the fourth disc portion 34, an outer diameter region bent portion 41 described later, and a protruding portion 44 described later.
- the above-described column part 25 includes a part of the second disk part 32, a third disk part 33, a part of the fourth disk part 34, a third cylindrical part 38, and a fourth cylindrical part 39. It is the structure containing.
- the retainer 11 includes an outer diameter region bent portion 41 that is formed by bending an outer diameter side region of the retainer 11 toward an inner diameter side. That is, the retainer 11 is provided with an outer diameter region bent portion 41 that is formed by bending an outer diameter side region of the retainer 11 to the inner diameter side.
- the outer diameter region bent portion 41 is formed so as to extend continuously in an annular shape. Specifically, the outer-diameter region bending portion 41 bends the outer-diameter-side end of the fourth disc portion 34 arranged on the outermost-diameter side toward the upper side in the axial direction at a predetermined angle. It is formed.
- the angle of the outer diameter region bent portion 41 that is, the angle between the surface 42 located on the inner diameter side of the outer diameter region bent portion and the upper surface 43 of the fourth disc portion 34 is shown in FIGS. indicated by angle B 1 in, it is an acute angle.
- the outer diameter region bent portion 41 is formed so as to bend the region located on the outer diameter side of the pocket 21 obliquely toward the inner diameter side.
- the retainer 11 is provided with a protruding portion 44 at a position where the pocket 21 is formed in the outer diameter region bent portion 41. That is, the outer peripheral edge of the protruding portion 44 (the inner peripheral edge of the outer diameter region bent portion 41 excluding the protruding portion 44) overlaps with the outer peripheral edge of the pocket 21.
- the protruding portion 44 is provided so as to protrude toward the inner diameter side in the region on the outer diameter side of the pocket 21 and to come into contact with the end face 16 of the needle roller 13 accommodated in the pocket 21.
- the protruding portion 44 has a shape in which a part of the tip of the outer diameter region bent portion 41 extends toward the inner diameter side.
- the protruding portion 44 is formed so that the apex of the protruding portion 44 is located at the center in the circumferential direction of the pocket 21 at the circumferential position.
- the protruding portion 44 has a corner portion 45 on the surface 42 side (a corner portion 45 positioned on the innermost diameter side of the protruding portion 45) which is a portion positioned on the innermost diameter side of the protruding portion 44.
- the needle roller 13 is provided so as to contact the center of the end surface 16.
- the corner portion 45 in this case is a corner located on the fourth disc portion 34 side of the protruding portion 44.
- the holder 11 is provided with three pilot holes 51 and 52.
- the three pilot holes 51 and 52 serve as alignment engaging portions.
- one of the pilot holes is not shown.
- the three pilot holes 51 and 52 are provided so as to penetrate straightly in the plate thickness direction at intervals in the circumferential direction.
- the three pilot holes 51 and 52 are each opened in a round hole shape.
- the three pilot holes 51 and 52 are provided at approximately equal intervals.
- the pilot holes 51 and 52 are provided at intervals of 120 degrees around the rotation axis 12 of the cage 11.
- the pilot holes 51 and 52 are provided at the center in the radial direction in the first disc portion 31 located on the innermost diameter side.
- As the diameter of the pilot holes 51 and 52 for example, ⁇ 2.5 mm or ⁇ 3 mm is selected.
- the thrust roller bearing 20 provided with such a cage 11 is configured to include, for example, a plurality of needle rollers 13, a race ring 14 located on the upper side, and a race ring 15 located on the lower side.
- the needle rollers 13 accommodated in the pocket 21 are the raceway surface 18 of the raceway 14 located on the upper side in the axial direction and the raceway ring located on the lower side in the axial direction.
- Roll on 15 raceway surfaces 19 The cage 11 rotates around the rotation axis 12.
- each needle roller 13 accommodated in the pocket 21 performs a revolving motion while performing a rotation motion.
- centrifugal force to the outer diameter side acts on the needle rollers 13.
- the center of the end surface 16 of the needle roller 13 has a protrusion 44 provided on the retainer 11, specifically, a corner 45 positioned on the innermost diameter side of the protrusion 44 provided on the retainer 11. Sliding contact.
- the corner 45 of the projecting portion 44 is a region in contact with the end face 16 of the needle roller 13.
- the corner 45 is surface-pressed.
- the corner portion 45 does not have a sharply pointed portion, and is smoothly connected to the surface constituting the corner portion 45. And the aggression to the member of the other party which the corner
- the protruding portion 44 when forming the protruding portion 44, can be formed at an appropriate location using the pilot holes 51 and 52 that are engaging portions for alignment. . If it does so, the protrusion part 44 can be formed accurately. In this case, since the protruding portion 44 is formed by bending the outer diameter side region of the cage 11 toward the inner diameter side, the protruding portion 44 can be appropriately formed regardless of the size of the roller. Moreover, since the corner
- FIG. 4 is a flowchart showing typical steps of the method for manufacturing the thrust roller bearing retainer 11 according to the embodiment of the present invention.
- a cage material that will later become cage 11 is prepared (cage material preparation step) (FIG. 4A).
- this cage material for example, a thin flat steel plate is used.
- the cage material may be a plate material cut into a substantially rectangular shape at this stage in order to form the final outer diameter shape of the cage in the subsequent outer shape forming process.
- a disc-shaped plate material may be used.
- FIG. 5 is a cross-sectional view of the cage material after performing the uneven shape forming step.
- the cross section shown in FIG. 5 corresponds to the cross section shown in FIG.
- the flat retainer material 56 is subjected to drawing to provide first to fourth disc portions 61, 62, 63, 64, and first to fourth discs.
- Four cylindrical portions 66, 67, 68, 69 are formed.
- board thickness direction is provided in the center. That is, in this case, the cage material 56 has a so-called mountain-valley shape that is bent a plurality of times in the axial direction.
- FIG. 6 is an enlarged cross-sectional view showing a part of the cage material 56 after the pilot hole forming step is enlarged.
- the cross section shown in FIG. 6 corresponds to a portion shown in a region VI in FIG.
- the pilot hole 71 as the engaging portion is provided so as to penetrate straight in the plate thickness direction at the radial center of the first disc portion 61.
- a total of three pilot holes 71 are provided at approximately equal intervals with an interval of 120 degrees in the circumferential direction.
- FIG. 7 is an enlarged cross-sectional view showing a part of the cage material 56 after the outer shape forming step is performed.
- the cross section shown in FIG. 7 corresponds to a portion shown in a region VI in FIG. 2, and is a case where the cross section is shown by VII-VII in FIG.
- the retainer material 56 is formed by punching straight in the thickness direction so that the final outer shape of the retainer 11 is obtained by a subsequent outer diameter region bending step or the like. In this manner, the outer end 72 of the retainer 11, specifically, the outer end 72 of the fourth disc portion 64 is formed.
- FIG. 8 is a view showing a part of the cage material 56 after the pocket forming step performed after the outer shape forming step.
- FIG. 8 corresponds to FIG.
- a plurality of guide pins serving as a so-called pencil-shaped positioning jig whose tip is sharp and gradually increases in diameter in a tapered shape are provided in a plurality of pilot holes 71. Insert gradually from one side in the thickness direction. Then, positioning is performed by a plurality of guide pins, and the punching device (not shown) for punching the entire outer shape is punched in consideration of the position and shape of the protrusion 70. By doing so, even if the positions of the punching device and the cage material 56 are slightly deviated from the positions where the protrusions 70 are provided, the pencil-shaped guide pins with sharp tips are gradually inserted into the pilot holes 71.
- punching can be performed by returning the cage material 56 to the correct position where the protrusion 70 should be provided with respect to the positional relationship with the punching device.
- the three pilot holes 71 are provided, rotation of the cage material 56 and the like can be prevented when positioning is performed, and more reliable positioning can be performed.
- FIG. 9 is an enlarged cross-sectional view showing a part of the cage material after the pocket forming step is enlarged.
- the cross section shown in FIG. 9 corresponds to the portion shown in region III in FIG. 2, and is a case where the cross section is shown by IX-IX in FIG.
- the pocket 73 extends over a part of the second disk part 62, the third disk part 63, a part of the fourth disk part 64, and the third cylindrical part 68, and the The pocket material is formed so as to penetrate the retainer material 56 straightly in the plate thickness direction over the four cylindrical portions 69.
- FIG. 9 is an enlarged cross-sectional view showing a part of the cage material after the pocket forming step is enlarged.
- the cross section shown in FIG. 9 corresponds to the portion shown in region III in FIG. 2, and is a case where the cross section is shown by IX-IX in FIG.
- the pocket 73 extends over a part of the second disk part 62, the third disk part 63, a part
- an upper roller stopper and a lower roller stopper having a shape protruding inward in the circumferential direction of the pocket 73 are formed at the same time. That is, the pocket is removed along the outer shape of the needle roller 13 accommodated in the pocket 73 in consideration of the shapes of the upper roller stopper and the lower roller stopper.
- a plurality of pockets 73 may be formed simultaneously by removing the pockets, or one pocket 73 may be formed one by one.
- the pilot hole 71 is used to align the punching device (not shown) for punching the pocket with the cage material 56 to be punched. That is, the pocket 73 is formed with reference to the position where the pilot hole 71 is provided. Also in this case, the circumferential positioning is performed using the plurality of pilot holes 71 in the same manner as in the outer shape forming process described above. Specifically, similarly to the above, a plurality of guide pins as sharp pencil-shaped positioning jigs are prepared, and the tips are gradually inserted into the plurality of pilot holes 71 from one side in the plate thickness direction.
- a plurality of pockets 73 may be formed by punching simultaneously, or the pockets 73 may be formed by punching one by one.
- the position where the pocket 73 is provided is a position avoiding the pilot hole 71 in the circumferential direction, but the positional relationship with the pilot hole 71 is arbitrarily determined.
- a plurality of pockets 73 are formed such that pilot hole 71 is arranged at a position corresponding to the center in the circumferential direction between adjacent pockets 73.
- FIG. 10 is an enlarged cross-sectional view showing a part of the cage material in an intermediate stage of the outer diameter region bending process.
- 11 and 12 are enlarged cross-sectional views showing a part of the cage material 56 after the outer diameter region bending step is enlarged.
- the cross section shown in FIGS. 10 and 11 corresponds to a portion shown in a region VI in FIG.
- the cross section shown in FIG. 12 corresponds to the portion shown in region III in FIG.
- the end 72 on the outer diameter side of the cage material 56 extending in an annular shape is once bent over the entire region so as to be straight in the thickness direction.
- the angle B 2 between the surface 75 located on the inner diameter side of the outer diameter region bent portion 74 and the upper surface 76 of the fourth disc unit 64 is approximately at right angles.
- the method of bending at a right angle is not particularly limited, for example, it is performed as follows.
- 15 and 16 are enlarged sectional views showing a state in which the outer diameter region bending step is performed. As shown in FIG. 15, a region excluding the region on the outer diameter side of the fourth disc portion 64 in the cage material 56 is sandwiched and held in the vertical direction by the holding members 101 and 102, and the fourth disc portion 64 is held.
- the pressing member 103 is disposed under the outer diameter side region. Next, as shown in FIG. 16, by pushing up the pressing member 103, the outer diameter side region bent portion 74 can be bent at a right angle with respect to the fourth disc portion 64.
- the outer diameter side region bent portion 74 is bent toward the inner diameter side to form the outer diameter region bent portion 74 that is bent obliquely toward the inner diameter side.
- the bending angle in this case that is, the angle between the surface 75 located on the inner diameter side of the outer diameter region bending portion 74 and the upper surface 76 of the fourth disk portion 64 is shown in FIGS. 11 and 12. represented by the angle B 3.
- Angle B 3 corresponds to the angle B 1 described above. That is, the angle B 1 and the angle B 3 are in the same relationship.
- the protrusion 70 is provided at the center in the circumferential direction of the pocket 73 in the circumferential positional relationship, the protrusion 70 is formed at an appropriate location. Specifically, in the protruding portion 70, the corner portion 77 located on the fourth disc portion 76 side comes into contact with the center of the end surface 16 of the needle roller 13. Finally, a surface pressing process is performed on a region of the protrusion 70 that contacts the end surface 16 of the needle roller 13. Thus, the thrust roller bearing retainer 11 having the structure shown in FIGS. 1 to 3 is manufactured.
- FIG. 17 is an enlarged cross-sectional view showing a state in which the outer diameter region bending step is performed.
- FIG. 18 is an enlarged cross-sectional view illustrating a state in which the surface pressing process is performed.
- FIG. 19 is an enlarged cross-sectional view showing an enlarged front end of the outer diameter region bent portion after the surface pressing process. Specifically, as shown in FIG.
- the outer-diameter-side region bent portion 74 is perpendicular to the fourth disc portion 64, the outer-diameter-side region bent portion.
- a region on the inner diameter side than 74 is sandwiched and held by the molds 104 and 105 in the vertical direction.
- the outer diameter side edge of the upper mold 104 is positioned closer to the inner diameter side than the outer diameter side edge of the lower mold 105.
- the mold 106 that pressurizes the outer diameter region bent portion 74 from the upper side to the lower side is disposed so as to be in contact with the surface 78 located on the outer diameter side of the outer diameter region bent portion 74.
- the mold 106 is abutted with the upper mold 104 and extends in the vertical direction on the inner diameter side end face 106 a, the horizontal surface 106 b that is continuous with the inner diameter side end face 106 a and extends on the outer diameter side, and the outer diameter area bending portion 74.
- a portion 106d that has an inner diameter side surface 106c that is abutted with the outer diameter side surface 78 and extends in the vertical direction has a round (R) shape.
- the surface pressing member 104 is further moved downward, the corner located on the inner diameter side in the outer diameter region bending portion 74 is smoothed by the die 104, and the outer diameter region is bent by the die 106.
- the corner located on the outer diameter side in the portion 74 is smoothed.
- region which contacts the end surface of a roller is surface-pressed can be formed.
- the cage material 56 protrudes toward the inner diameter side in the outer diameter side region of the pocket 73 using the pilot hole 71 formed in the pilot hole forming step. Since the protrusion part 70 which contacts with the end surface of a roller is formed, positioning at the time of forming the protrusion part 70 can be performed appropriately. Further, in the pocket forming step, the pocket 73 is formed on the cage material 56 using the pilot hole 71 formed in the pilot hole forming step. Therefore, the pocket 73 can be properly positioned. it can. In other words, the protrusion 70 can be formed with high accuracy and efficiency in the positional relationship between the protrusion 70 to be formed and the pocket 73 to be formed.
- the pilot hole forming step is a step of forming the pilot hole 71 in a region on the inner diameter side of the pocket 73, the pilot hole 71 can be formed by effectively using the space that the cage 11 has. it can.
- the pilot hole forming step is a step of avoiding a location where the pocket 73 is provided in the circumferential direction, and therefore, a local strength reduction is avoided in the circumferential direction of the cage 11. be able to.
- the concave / convex shape forming step for forming the concave / convex shape in the plate thickness direction is included with respect to the cage material 56 prior to the pocket forming step, A large length dimension in the rotation axis direction can be ensured, and the rollers can be appropriately held.
- the concave / convex shape forming step performs drawing processing on the cage material 56, the concave / convex shape can be formed more efficiently.
- the outer shape of the cage material 56 is formed by punching in the outer shape forming step, the outer shape of the cage material 56 can be formed relatively easily and accurately. it can.
- FIG. 13 is a cross-sectional view showing a part of the cage in this case.
- FIG. 13 corresponds to a cross section of the cage shown in FIG.
- a thrust roller bearing retainer 81 according to another embodiment of the present invention is provided with a protruding portion 83 at a position where pocket 85 is formed in outer diameter region bent portion 82. ing.
- the protruding portion 83 is configured to come into contact with the center of the end surface 16 of the needle roller 13 accommodated in the pocket 85 at a corner portion 84 opposite to the fourth disc portion 86 side.
- the corner portion 84 is subjected to surface pressing. In order to obtain such a configuration, it is preferable to perform processing using a jig having an angle along the corner 84 in the outer diameter region bending step.
- FIG. 14 is a diagram showing a part of the cage in this case.
- a thrust roller bearing retainer 91 according to still another embodiment of the present invention includes a plurality of pockets 92 and a column part 93 positioned between two adjacent pockets 92.
- a pilot hole 95 is provided between the pocket 92 and the pocket 92 at the position of the column portion 94 where the pocket 92 is to be formed.
- the pilot holes 95 have a so-called alternative shape in which one of the plurality of pockets 92 provided at equal intervals in the circumferential direction is replaced with the pilot hole 95.
- the pilot hole is configured to penetrate straight in the thickness direction.
- the present invention is not limited to this.
- the pilot hole penetrates so that the wall surface of the pilot hole is tapered. You may do it.
- a rectangular hole, a triangular hole, or the like can be employed regardless of the round hole shape.
- the pilot hole is provided as the engaging portion, the present invention is not limited to this, and the engaging portion may be configured by another configuration, for example, a notch.
- the drawing process is performed in the uneven shape forming step.
- the present invention is not limited to this, and the uneven shape may be formed by a process other than the drawing process, for example, a bending process.
- the cage is configured to form a concavo-convex shape in the plate thickness direction.
- the present invention is not limited to this, and the cage does not have a concavo-convex shape in the plate thickness direction. You may comprise so that the holder
- the thrust roller bearing provided with such a cage may be configured not to include a race ring. Furthermore, you may decide to use rollers other than a needle roller, for example, a rod-shaped roller.
- the thrust roller bearing retainer and the manufacturing method thereof according to the present invention are required in the case where a thrust roller bearing retainer having good performance and a more efficient production of such a thrust roller bearing retainer are required. , Effectively used.
Abstract
Description
Claims (12)
- スラストころ軸受に備えられ、ころを収容するポケットが複数設けられているスラストころ軸受の保持器であって、
前記保持器の外径側の領域を内径側に折り曲げるようにして形成され、前記ポケットの外径側の領域において内径側に突出して前記ころの端面と接触する突出部を備え、
前記突出部のうち、前記ころの端面と接触する領域は、面押し加工されている、スラストころ軸受の保持器。 - 前記突出部を形成する際の位置合わせ用の係合部が設けられている、請求項1に記載のスラストころ軸受の保持器。
- 前記係合部は、パイロット穴である、請求項2に記載のスラストころ軸受の保持器。
- 前記突出部は、前記保持器の外径側の領域を内径側に斜めに折り曲げるようにして形成される、請求項1~3のいずれか1項に記載のスラストころ軸受の保持器。
- スラストころ軸受に備えられ、ころを収容するポケットが複数設けられているスラストころ軸受の保持器の製造方法であって、
後に保持器となる保持器素材を準備する保持器素材準備工程と、
前記保持器素材に対して、前記ポケットの外径側の領域において内径側に突出して前記ころの端面と接触する突出部を形成する突出部形成工程と、
前記保持器素材に対して、前記ポケットを形成するポケット形成工程と
前記突出部形成工程および前記ポケット形成工程の後に、前記保持器素材の外径側の領域を折り曲げる外径領域折り曲げ工程と、
前記突出部形成工程において形成した突出部のうち、前記ころの端面と接触する領域に面押し加工を行う面押し加工工程とを含む、スラストころ軸受の保持器の製造方法。 - 前記保持器素材に対して、位置合わせ用の係合部を形成する係合部形成工程をさらに含み、
前記突出部形成工程では、前記係合部形成工程により形成した前記係合部を利用して、前記突出部を形成し、
前記ポケット形成工程では、前記係合部形成工程により形成した前記係合部を利用して、前記ポケットを形成する、請求項5に記載のスラストころ軸受の保持器の製造方法。 - 前記係合部形成工程は、前記保持器素材を板厚方向に貫通するパイロット穴を形成する工程である、請求項6に記載のスラストころ軸受の保持器の製造方法。
- 前記係合部形成工程は、前記ポケットよりも内径側の領域に前記係合部を形成する工程である、請求項6または7に記載のスラストころ軸受の保持器の製造方法。
- 前記保持器素材に対し、板厚方向に凹凸形状を形成する凹凸形状形成工程を含む、請求項5~8のいずれかに記載のスラストころ軸受の保持器の製造方法。
- 前記凹凸形状形成工程は、前記保持器素材に対する絞り加工を含む、請求項9に記載のスラストころ軸受の保持器の製造方法。
- 前記突出部形成工程は、前記突出部を形成するように前記保持器素材を打ち抜いて外形形状を形成する工程である、請求項5~10のいずれかに記載のスラストころ軸受の保持器の製造方法。
- トランスファープレスを用いて製造される、請求項5~11のいずれかに記載のスラストころ軸受の保持器の製造方法。
Priority Applications (4)
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EP14877933.3A EP3096032B1 (en) | 2014-01-10 | 2014-12-11 | Thrust roller bearing retainer and method for manufacturing same |
US15/109,885 US10060476B2 (en) | 2014-01-10 | 2014-12-11 | Thrust roller bearing cage and method for manufacturing the same |
JP2014560176A JP6514506B2 (ja) | 2014-01-10 | 2014-12-11 | スラストころ軸受の保持器、およびその製造方法 |
CN201480072585.6A CN105899827B (zh) | 2014-01-10 | 2014-12-11 | 推力滚子轴承护圈及其制造方法 |
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US (1) | US10060476B2 (ja) |
EP (1) | EP3096032B1 (ja) |
JP (1) | JP6514506B2 (ja) |
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US10260555B2 (en) * | 2014-11-18 | 2019-04-16 | Ntn Corporation | Thrust roller bearing cage and method for manufacturing the same |
JP2019211005A (ja) * | 2018-06-05 | 2019-12-12 | 株式会社ジェイテクト | スラストニードル軸受 |
DE102019204010A1 (de) * | 2019-03-25 | 2020-10-01 | Aktiebolaget Skf | Lagerkäfig |
CN112496160B (zh) * | 2020-10-30 | 2023-11-28 | 保隆(安徽)汽车配件有限公司 | 一种尾管装饰框体的制造方法 |
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- 2014-12-11 JP JP2014560176A patent/JP6514506B2/ja not_active Expired - Fee Related
- 2014-12-11 CN CN201480072585.6A patent/CN105899827B/zh active Active
- 2014-12-11 US US15/109,885 patent/US10060476B2/en active Active
- 2014-12-11 WO PCT/JP2014/082828 patent/WO2015104946A1/ja active Application Filing
- 2014-12-11 EP EP14877933.3A patent/EP3096032B1/en active Active
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JP6514506B2 (ja) | 2019-05-15 |
US10060476B2 (en) | 2018-08-28 |
EP3096032A4 (en) | 2017-10-25 |
EP3096032B1 (en) | 2020-02-05 |
JPWO2015104946A1 (ja) | 2017-03-23 |
CN105899827B (zh) | 2019-01-18 |
US20160333936A1 (en) | 2016-11-17 |
EP3096032A1 (en) | 2016-11-23 |
CN105899827A (zh) | 2016-08-24 |
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