JP2008075791A - Cage and rolling bearing - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cage whose axial movement can be easily restricted and to which lubricating oil can be properly supplied depending on working conditions. <P>SOLUTION: The cage 11 comprises a pair of annular parts 12a, 12b having collar portions 18a, 18b bent to the inner diameter side, and a plurality of columnar parts 14 connecting the pair of annular parts 12a, 12b to each other to form a plurality of pockets 13 which hold rollers 20 and having central portions 15 recessed to the inner diameter side. Herein, an inner diameter size L<SB>1</SB>of one collar portion 18a is different from an inner diameter size L<SB>2</SB>of the other collar portion 18b. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a cage and a rolling bearing, and more particularly to a cage in which a center of a column portion is bent toward an inner diameter side and a rolling bearing provided with such a cage.

  Rollers with cages may be used on the idler of an automobile transmission or the large end of a connecting rod (connecting rod) of a motorcycle engine. A roller with a cage is a type of rolling bearing that does not include an outer ring, an inner ring, or the like, and includes a roller and a cage that holds the roller. A cage included in a roller with a cage is required to reduce costs, for example, quality improvement such as stable holding of the roller and productivity improvement.

Among such cages, a technique relating to a manufacturing method of an M-type cage, that is, a cage having a shape in which the center of the column portion and the flange portion are bent to the inner diameter side is disclosed in Japanese Patent Laid-Open No. 3-169442. It is disclosed in Japanese Patent Publication (Patent Document 1) and Japanese Patent Application Laid-Open No. 2000-257638 (Patent Document 2).
JP-A-3-169442 (FIGS. 3 to 6) JP 2000-257638 A (paragraph numbers 0027 to 0029, FIGS. 6 to 8)

  In general, for rolling bearings including the cage described above, in order to restrict the movement in the axial direction, the movement is restricted on both sides in the axial direction of the cage, such as by placing retaining rings on both sides in the axial direction of the rolling bearing. Means must be provided.

  In addition, depending on the usage conditions, in order to make the internal lubrication state of the rolling bearing appropriate, when it is desired to actively supply lubricating oil only to one end of the roller, or lubrication held on one end of the roller. Sometimes it is desirable to retain the oil for a long time.

  An object of the present invention is to provide a cage that can easily regulate movement in the axial direction and can appropriately supply lubricating oil in accordance with a use situation.

  Another object of the present invention is to provide a rolling bearing that is less likely to break.

  The cage according to the present invention connects a pair of annular portions having flanges bent to the inner diameter side and a pair of annular portions so as to form a plurality of pockets for holding the rollers, and a central portion thereof has an inner diameter. And a plurality of pillars recessed to the side. Here, in the cage, the inner diameter dimension of one collar part is different from the inner diameter dimension of the other collar part.

  By comprising in this way, the movement of the holder | retainer to the one side of an axial direction can be controlled using the collar part by the side with a small internal diameter dimension. If it does so, the movement of the axial direction of a cage | basket can be controlled only by providing the movement control means to the other side of an axial direction. Therefore, the movement of the cage in the axial direction can be easily restricted. In addition, since the flange portion on the side with the larger inner diameter dimension is opened larger than the flange portion on the side with the smaller inner diameter dimension, lubricating oil can be actively supplied to the flange portion side with the larger inner diameter dimension. it can. Further, the retained lubricating oil can be retained longer for the flange side having a smaller inner diameter. Therefore, the supply of lubricating oil can be made appropriate according to the usage situation.

  Preferably, from both opening sides of the cylindrical member whose side portions are straight in the axial direction, a concave mold that is recessed in the radial direction is inserted, and a spreading mold that moves in the axial direction of the cylindrical member is inserted to form a cylindrical shape. The member is produced by pushing the member to the outer diameter side, and bending the eaves portion of the cylindrical member that has been spread to the inner diameter side by a bending mold that moves in the axial direction of the cylindrical member. By doing so, the cage having the above-described configuration can be easily manufactured only by the vertical movement of the mold.

  The cage includes a pair of annular portions and a plurality of column portions that connect the pair of annular portions so as to form a plurality of pockets that hold the rollers, and whose central portions are recessed toward the inner diameter side. Here, as for a cage | basket, one cyclic | annular part is equipped with the collar part bent by the internal diameter side among a pair of cyclic | annular parts, and the other cyclic | annular part is a closed end surface.

  By comprising in this way, a movement of the holder | retainer to the one side of an axial direction can be controlled using a closed end surface. If it does so, the movement of the axial direction of a cage | basket can be controlled only by providing the movement control means to the other side of an axial direction. Therefore, the movement of the cage in the axial direction can be easily restricted. Further, since the lubricating oil flows in and out only from the flange side bent to the inner diameter side, the lubricating oil can be positively supplied to the flange side bent to the inner diameter side. Further, the holding force of the lubricating oil on the closed end face side is improved. Therefore, the supply of lubricating oil can be made appropriate according to the usage situation.

  More preferably, the cage is manufactured by a transfer press. By carrying out like this, since an expansion process and a heel part bending process can be performed consistently, productivity can further be improved.

  In another aspect of the present invention, a rolling bearing includes any one of the above-described cages and rollers. Such a rolling bearing is provided with a cage that can easily regulate the movement in the axial direction and can appropriately supply the lubricating oil according to the use situation, and therefore is damaged due to insufficient lubrication. There is little fear of.

  According to this invention, the movement of the cage to the one side in the axial direction can be restricted using the flange portion on the side having a smaller inner diameter. If it does so, the movement of the axial direction of a cage | basket can be controlled only by providing the movement control means to the other side of an axial direction. Therefore, the movement of the cage in the axial direction can be easily restricted. In addition, since the flange portion on the side with the larger inner diameter dimension is opened larger than the flange portion on the side with the smaller inner diameter dimension, lubricating oil can be actively supplied to the flange portion side with the larger inner diameter dimension. it can. Further, the retained lubricating oil can be retained longer for the flange side having a smaller inner diameter. Therefore, the supply of lubricating oil can be made appropriate according to the usage situation.

  In addition, such a rolling bearing is provided with a cage that can easily regulate the movement in the axial direction and can appropriately supply the lubricating oil according to the use situation, and therefore it is caused by insufficient lubrication. There is less risk of damage.

  Embodiments of the present invention will be described below with reference to the drawings. FIG. 2 is a perspective view of a cage according to an embodiment of the present invention. FIG. 3 is a perspective view showing a rolling bearing 19 including the cage 11 shown in FIG. FIG. 1 is a cross-sectional view when the rolling bearing shown in FIG. 3 is cut along a cross section including a column portion. Referring to FIGS. 1, 2, and 3, rolling bearing 19 includes a cage 11 and a plurality of cylindrical rollers 20. That is, the rolling bearing 19 is a roller with a cage. The plurality of rollers 20 are housed and held in a plurality of pockets 13 provided in the cage 11.

  The cage 11 includes a pair of annular portions 12a and 12b and a plurality of column portions 14 that connect the pair of annular portions 12a and 12b so as to form a plurality of pockets 13 that hold the rollers. The central portion 15 in the axial direction of the column portion 14, that is, the central portion 15 in the direction of arrow A in FIG. 2 is more than the axial end portion 16 of the column portion 14 located on the pair of annular portions 12 a and 12 b side. It is recessed on the inner diameter side. That is, the column part 14 has a substantially V-shaped cross section. Further, both flange portions 18a and 18b forming the flanges 17a and 17b are bent to the inner diameter side. The flanges 17a and 17b extend in a direction perpendicular to the axial direction. That is, the cage 11 is a so-called M-type cage.

Here, in the retainer 11, the inner diameter dimension of the flange portion 18a is different from the inner diameter dimension of the flange portion 18b. Specifically, the inner diameter of the flange portion 18a and _{L 1,} when the inner diameter of the flange portion 18b and _{L 2,} and is configured L 1> _{L 2} and so as.

By comprising in this way, the area of the opening part of the collar part 18a side and the collar part 18b side can be varied. If it does so, the outflow amount and outflow amount of the lubricating oil from the exterior side of the rolling bearing 19 can be varied. Therefore, the supply state of the lubricating oil can be made different between the flange portion 18a side and the flange portion 18b side. That is, in the flange portion 18a side, since the inner diameter dimension L ₁ is large, it is easy to inflow of the lubricating oil from the direction of the arrow M ₁ in FIG. Moreover, the lubricating oil can easily flow out in the opposite direction. Therefore, the lubricating oil can be positively supplied on the flange portion 18a side. On the other hand, in the flange part 18b side, since the inner diameter dimension L ₂ is small, the flow of lubricating oil from the direction of the arrow M ₂ in FIG. 1 becomes difficult. Also, it is difficult to flow out the lubricating oil in the opposite direction. Therefore, the lubricating oil held inside the bearing can be retained for a long time on the flange portion 18b side. Thus, the supply state of the lubricating oil can be made different between the flange portion 18a side and the flange portion 18b side. Depending on the usage conditions, the rolling bearing 19 may want to actively supply lubricating oil to one end of the roller 20 or may want to retain the retained lubricating oil for a long time. Here, the supply of the lubricating oil is performed by setting the flange portion 18a side as a side where the lubricating oil is to be positively supplied and by setting the flange portion 18b side as a side where the lubricating oil is to be retained for a long time. Can be appropriate.

Further, it is possible to utilize a smaller flange part 18b inner diameter L _2, to restrict the movement of the one side in the axial direction of the cage 11. FIG. 4 is a cross-sectional view showing a state in which the rolling bearing 19 is attached to a rotating shaft having a stepped portion. Referring to FIG. 4, a rotating shaft 20 a having a stepped portion 20 b is attached to the inner diameter side of the rolling bearing 19. Specifically, it arrange | positions so that the end surface 20c of the stepped part 20b and the surface 18c inside the collar part 18b may face. By doing so, even if the cage 11 tries to move in the direction of arrow N in FIG. 4, the inner surface 18 c of the flange portion 18 a and the end surface 20 c of the stepped portion 20 b come into contact with each other, and the cage 11 is provided. The movement of the rolling bearing 19 in the axial direction is restricted. If it does so, the movement to the one side of an axial direction will be controlled by the collar part 18b. In this case, by disposing the retaining ring 20d on the side of the width surface 18d of the flange portion 18b, the movement of the rolling bearing 19 including the retainer 11 in the direction opposite to the arrow N can be restricted. Therefore, the axial movement of the rolling bearing 19 including the retainer 11 can be restricted only by providing the retaining ring 20d on one side. That is, the movement in the axial direction can be easily regulated.

  Next, the manufacturing method of the above cage 11 will be described. FIG. 5 is a flowchart showing a typical manufacturing process of the cage according to the embodiment of the present invention. 6 (A) to 6 (D) are schematic cross-sectional views of typical steps until a steel plate that is a material of the cage is formed into a cylindrical member that is an intermediate. 6A shows a deep drawing process, FIG. 6B shows a drilling process, FIG. 6C shows a burring process, and FIG. 6D shows a trimming process.

  With reference to FIG. 5 and FIG. 6 (A)-(D), first, the steel plate 21 used as the raw material of a cage is deep-drawn, and the steel plate 21 is processed into a cup shape (FIG. 5 (A), FIG. 6 (A)). Next, the cup-shaped bottom portion 22 is drilled (FIGS. 5B and 6B). Thereafter, the flange 23a existing on the holed side is formed into a straight shape in the axial direction by burring (FIGS. 5C and 6C). Next, the other flange portion 23b is formed into a straight shape in the axial direction by trimming (FIGS. 5D and 6D). In this manner, the cylindrical member 25 having the side portion 24 that is straight in the axial direction is formed. As described above, by manufacturing the cylindrical member 25, the cylindrical member 25 in which the plate thickness, that is, the thickness of the side portion 24 is substantially uniform can be easily manufactured.

  Next, the expansion process (FIG. 5E) for expanding the cylindrical member 25 obtained by the above-described method to the outer diameter side will be described. FIG. 7 is a schematic cross-sectional view showing a part of the spreader jig 26 used when manufacturing the cage according to the embodiment of the present invention. The axial direction of the cylindrical member 25 refers to the direction of arrow B in FIG. 7 or the opposite direction.

  First, the configuration of the spreading jig 26 will be described. Referring to FIG. 7, the spreading jig 26 is composed of an annular first mold 27 that can be divided by a dividing line in the radial direction, and two annular members, and is arranged in the upper and lower sides in the axial direction. Dies 28a and 28b, and a moving jig 29 for moving the first die 27 to the inner diameter side. The second molds 28a and 28b are provided to face each other with the cylindrical member 25 interposed therebetween. The moving jig 29 is disposed above the first mold 27. A first inclined portion 31 that is inclined with respect to the axial direction is provided at the axial end portion 30 of the moving jig 29.

  The first mold 27 is divided into four divided molds 27a, 27b, 27c, and 27d by radial dividing lines at intervals of 90 °. That is, one annular first mold 27 is formed by combining the four divided molds 27a to 27d. FIG. 8 is a view of an annular first mold 27 obtained by combining four divided molds 27a to 27d as viewed from the axial direction. In FIG. 7, only two split molds 27 a and 27 b arranged at opposing positions are shown.

  Each of the split molds 27a to 27d is provided with a convex portion 32 that protrudes toward the inner diameter side. The convex portion 32 is provided on the upper side of the center in the axial direction of the divided molds 27a to 27d. Moreover, the inner diameter surface 33 of the divided molds 27a to 27d including the convex portion 32 is a surface along the outer shape of the cage.

  The second molds 28a and 28b are spreading molds that spread the cylindrical member 25 in the radial direction. Concave portions 35 are provided at both end portions 34a and 34b of the second molds 28a and 28b. The recess 35 is provided so as to reduce the diameters of both end portions 34a and 34b. Specifically, in the second molds 28a and 28b, the radial dimension D of the portion where the recess 35 is provided is smaller than the radial dimension E of the portion where the recess 35 is not provided. Has been. Further, the dimension D is configured to be slightly smaller than the dimension F in the radial direction of the cylindrical member 25. The recess of the recess 35 has a shape corresponding to the protrusion of the protrusion 32.

  The second molds 28a, 28b and the moving jig 29 are movable in the axial direction, that is, in the direction of the arrow B in FIG. The split molds 27a to 27d are movable to the inner diameter side by the movement of the moving jig 29 in the axial direction. Specifically, when the moving jig 29 is moved in the direction of arrow B in FIG. 7, each of the split molds 27 a to 27 d has an inner diameter portion along the inclination of the first inclined portion 31. Is moved to the direction of arrow C in FIG.

  With reference to FIG. 7 and FIG. 8, a method of expanding the cylindrical member 25 to the outer diameter side and forming the outer shape of the cylindrical member 25 into the outer shape of the cage will be described. First, the cylindrical member 25 is disposed between the divided molds 27a to 27d and between the second molds 28a and 28b disposed in the vertical direction.

  Thereafter, the moving jig 29 is moved in the direction of arrow B in FIG. 7, and the split molds 27 a to 27 d are moved in the direction of arrow C. Then, the convex portions 32 of the split molds 27 a to 27 d are brought into contact with the outer diameter surface 36 of the cylindrical member 25. This state is shown in FIG. In this way, the split molds 27a to 27d, which are external molds having a shape that follows the external shape of the cage, are arranged around the cylindrical member 25.

  By configuring in this way, the split molds 27a to 27d can be moved to the inner diameter side only by the movement of the moving jig 29 in the axial direction. In this case, the first inclined portion 31 can smoothly and surely move the divided molds 27a to 27d to predetermined positions.

  Next, the second molds 28a and 28b are moved in the direction of the arrow B or vice versa, and are inserted into the inner side from the both side portions 37a and 37b which are both openings of the cylindrical member 25. This state is shown in FIG. At this time, the annular recesses 35 are provided at both end portions 34a, 34b of the second molds 28a, 28b, and the dimensional relationship described above can be inserted smoothly.

  Here, since the dimension in the radial direction of the portion where the concave portion 35 is not provided is configured to be larger than the dimension in the radial direction of the portion where the concave portion 35 is provided, the second molds 28a and 28b are used to form a cylinder. The member 25 is inserted so as to spread from the inside. Then, it inserts until the both ends 34a and 34b of 2nd metal mold | die 28a and 28b contact | abut mutually. Here, since the concave portions 35 having a shape along the convex portions 32 provided in the divided molds 27a to 27d are provided at both end portions 34a and 34b of the second molds 28a and 28b, the cylindrical member 25 is provided. Of these side portions 24, the upper side from the center in the axial direction can be recessed toward the inner diameter side. In this way, the side portion 24 of the cylindrical member 25 can have a substantially V-shaped cross section, and can have a shape along the inner diameter surface 33 of the divided molds 27a to 27d, that is, the outer shape of the cage.

  Next, the heel part bending process for forming a flange on the cylindrical member 25 obtained by the above-described method will be described. The heel part bending step includes a necking process (FIG. 5 (F)) in which both heel parts 37a, 37b of the cylindrical member 25 are bent in the radial direction by a predetermined angle, and after the necking process, the both heel parts 37a, 37b are And a determination step (FIG. 5G) of bending in a direction perpendicular to the axial direction. FIG. 11 is a schematic cross-sectional view showing a part of the necking jig 38 used in manufacturing the cage according to the embodiment of the present invention.

  First, the configuration of the necking jig 38 will be described. Referring to FIG. 11, the necking jig 38 includes a seventh mold 27e, two annular members, third molds 39a and 39b arranged in the vertical direction, and an inner diameter of the cylindrical member 25. A ring-shaped fourth mold 40 arranged on the side and separable by a dividing line in the radial direction, and an insertion jig 41 arranged on the inner diameter side of the fourth mold 40. The third molds 39a and 39b are movable in the axial direction, that is, in the direction of the arrow B or vice versa. The 3rd metal mold | die 39a, 39b is a collar part bending metal mold | die which bend | folds the collar part of the cylindrical member 25 pushed and expanded to the inner diameter side. The insertion jig 41 is a rod-shaped member. The seventh mold 27e basically has the same configuration as the first mold 27. However, it differs from the first mold 27 in that the convex portion is provided at the center in the axial direction.

  The fourth mold 40 is divided into eight divided molds 40a, 40b, 40c, 40d, 40e, 40f, 40g, and 40h along a radial dividing line at 45 ° intervals. That is, eight annular molds 40a to 40h are combined to form one annular fourth mold 40. FIG. 12 is a view of the combined eight divided molds 40a to 40h as seen from the axial direction. Note that FIG. 11 shows only two split molds 40a and 40b arranged at opposing positions.

  Each of the outer diameter surfaces 42 of the divided molds 40a to 40h has a shape along the inner diameter surface 43 of the cylindrical member 25 whose side portion 24 has a substantially V-shaped cross section. Each of the divided molds 40a to 40h is incorporated into the cylindrical member 25, and the insertion jig 41 is disposed at the center thereof, so that the outer diameter surface 42 of the divided molds 40a to 40h is substantially free of gaps and the cylindrical member 25. It contacts with the inner diameter surface 43. Moreover, the 2nd inclination part 44 inclined with respect to the axial direction is provided in the both ends of the axial direction of the division molds 40a-40h.

  At both ends of the third molds 39a and 39b, there are provided recesses 45 whose center portions in the radial direction are recessed. A third inclined portion 46 that is inclined from the axial direction is provided on the outer diameter side of the recess 45. The inclination of the third inclined portion 46 is a shape that follows the inclination of the second inclined portion 44. Of the third molds 39a and 39b, the recess 45 of the third mold 39b disposed on the lower side is configured to have a larger amount of recess than the recess of the third mold 39a disposed on the upper side. Has been. Moreover, it has the shape corresponding to this also about the outer-diameter surface 42 of the division molds 40a-40h.

  Next, with reference to FIGS. 11 and 12, a necking method for bending both flange portions 37a and 37b of the cylindrical member 25 to the inner diameter side by a predetermined angle will be described. First, the divided molds 40a to 40h constituting the fourth mold 40 are respectively inserted into the inner diameter side of the cylindrical member 25 disposed in the center of the seventh mold 27e, and the outer diameter surface 42 is the inner diameter surface. 43 to be in contact with 43. In this case, since the divided molds 40a to 40h are divided, the respective divided molds 40a to 40h can be easily inserted. Moreover, since the cylindrical member 25 has a shape in which the upper side is recessed toward the inner diameter side with respect to the center in the axial direction, the protruding amount of the flange portion 37b is larger than the protruding amount of the flange portion 37a. The cylindrical member 25 is fixed in the radial direction by the seventh and fourth molds 27e and 40.

  Next, the third molds 39a and 39b are moved in the axial direction and moved from the vertical direction toward the cylindrical member 25. If it does so, both the collar parts 37a and 37b of the cylindrical member 25 can be bent at a predetermined angle to the inner diameter side along the shape of the second and third inclined parts 44 and 46. In this way, necking is performed by the axial movement of the third molds 39a and 39b. By doing so, both flanges 37a and 37b can be easily bent in a direction perpendicular to the axial direction on the inner diameter side in a later step. Further, the third molds 39a and 39b and the fourth mold 40 can be bent accurately. In addition, the amount by which the collar part 37b is bent is larger than the amount by which the collar part 37a is bent.

  Then, the determination process which bends both the collar parts 37a and 37b in the direction perpendicular | vertical to an axial direction is performed. First, the configuration of the determination jig 47 used in the determination process will be described. FIG. 13 is a schematic cross-sectional view showing a part of a deciding jig 47 used in manufacturing the cage according to the embodiment of the present invention. Referring to FIG. 13, the determination jig 47 is arranged in the vertical direction of the cylindrical member 25 in the same manner as the first mold 27, the insertion jig 41, and the third molds 39 a and 39 b described above. The fifth metal molds 48a and 48b, and the sixth metal mold 49 disposed on the inner diameter side of the cylindrical member, like the above-described fourth metal mold 40, are provided.

  The fifth molds 48a and 48b have substantially the same configuration as the third molds 39a and 39b, and are different in that both ends are configured by a plane 50 in a direction perpendicular to the axial direction. . The fifth dies 48a and 48b are also ridge part bending dies that fold the heel part of the cylindrical member 25 that is spread out to the inner diameter side. The sixth mold 49 has substantially the same configuration as that of the fourth mold 40, and the difference is that the end portion is configured by a plane 51 in a direction perpendicular to the axial direction.

  With reference to FIG. 13, a method of bending both flanges 37a and 37b in a direction perpendicular to the axial direction will be described.

  In the necking step, the sixth mold 49 is arranged using the insertion jig 41 on the inner diameter side of the cylindrical member 25 in which both the flange portions 37a and 37b are bent to the inner diameter side at a predetermined angle. Thereafter, both flanges 37a and 37b are pushed by the fifth molds 48a and 48b from above and below. If it does so, both collar parts 37a and 37b will be in the shape bent by the planes 50 and 51 in the direction perpendicular | vertical to an axial direction. In this way, a flange in a direction perpendicular to the axial direction is formed. In this case, since both the flange portions 37a and 37b are bent to the inner diameter side by a predetermined angle by the above-described necking step, they are not bent to the outer diameter side by the flat surfaces 50 and 51. In this way, both flanges 37a and 37b form a flange bent in a direction perpendicular to the axial direction on the inner diameter side. In this case, since the protrusion amounts of the flange portions 37a and 37b are different, the inner diameter dimensions of the flange portions 37a and 37b are different. Note that the inner diameters of the flange portions 18a and 18b can be adjusted by changing the protruding amounts of the flange portions 18a and 18b.

  Thereafter, the side portions of the cylindrical member 25 are pocketed to form pockets for holding the rollers (FIG. 5 (H)). Finally, heat treatment is performed to obtain a final cage (FIG. 5I). In addition, you may give the plating film process etc. to the surface as needed, such as a required characteristic, a function, a use.

  From the above, it is possible to manufacture a cage in which the inner diameter dimension of one collar part is different from the inner diameter dimension of the other collar part.

  In addition, such a cage has a depression mold that has concave portions that are recessed in the radial direction from both opening sides of the cylindrical member whose side portions are straight in the axial direction, and that moves in the axial direction of the cylindrical member. The cylindrical member is inserted and expanded to the outer diameter side, and the flange portion of the expanded cylindrical member is bent to the inner diameter side by a bending mold that moves in the axial direction of the cylindrical member. Yes. Therefore, the cage having the above-described configuration can be easily manufactured only by the vertical movement of the mold.

  Here, you may decide to manufacture the said process consistently by transfer press. In this case, productivity can be further improved since the above-described pushing and spreading step and heel bending step can be performed consistently.

  In addition, a roller with a cage is manufactured by incorporating the roller into the pocket of the cage manufactured as described above.

  Such a roller with a retainer is effectively used, for example, for a large end of a connecting rod or an idler for an automobile transmission. FIG. 14 is a longitudinal sectional view of a two-cycle engine using the above-mentioned roller with cage at the large end of the connecting rod. Referring to FIG. 14, a two-cycle engine 61 connects a crankshaft 64 that outputs rotational motion, a piston 66 that performs linear reciprocating motion by combustion of an air-fuel mixture, and a crankshaft 64 and piston 66 to linearly reciprocate. And a connecting rod 65 for converting the motion into a rotational motion. The crankshaft 64 rotates about the rotation center shaft 71 and balances rotation by a balance weight 72.

  The connecting rod 65 is formed by providing a large end portion 74 below the linear rod body and a small end portion 75 above. The crankshaft 64 is rotatably supported by a large end portion 74 of the connecting rod 65, and the piston pin 73 connecting the piston 66 and the connecting rod 65 is rotatably supported by a small end portion 75 of the connecting rod 65 via a rolling bearing 67, respectively. .

  The air-fuel mixture obtained by mixing gasoline and lubricating oil is fed into the crank chamber 63 from the intake hole 68 and then guided to the combustion chamber 70 above the cylinder 62 in accordance with the vertical movement of the piston 66 and burned. The burned exhaust gas is discharged from the exhaust hole 69.

  The roller with cage described above is used for a rolling bearing provided at the large end of the connecting rod and supporting the crankshaft.

  In addition, in said embodiment, although it was set as the structure which opens the both collar parts of an axial direction, it is not restricted to this, A cage | basket provided with the closed end surface by which one side was closed may be used. FIG. 15 is a cross-sectional view of a rolling bearing provided with a cage in this case. Referring to FIG. 15, rolling bearing 91 includes cage 81 and 92. The cage 81 connects the pair of annular portions 82a and 82b so as to form a pair of annular portions 82a and 82b and a plurality of pockets 83 for holding the rollers 92, and a plurality of the central portions 85 are recessed toward the inner diameter side. The column part 84 is provided. Here, of the pair of annular portions 82a and 82b, one annular portion 82a includes a flange portion 86 bent toward the inner diameter side. The other annular portion 82 b is a closed end surface 87.

  By comprising in this way, the movement of the holder | retainer 81 to the one side of an axial direction can be controlled using the closed end surface 87. FIG. Then, since only the movement restricting means to the other side in the axial direction has to be provided, the movement of the cage 81 in the axial direction can be easily restricted. Further, since the lubricating oil flows in and out only from the side of the flange portion 86 bent toward the inner diameter side, the lubricating oil can be positively supplied to the side of the flange portion bent toward the inner diameter side. Further, the holding force of the lubricating oil on the closed end face 87 side is improved. Therefore, the supply of lubricating oil can be made appropriate according to the usage situation.

  Such a cage may be manufactured by using a steel plate that has been deep drawn and formed into a cup shape, as shown in FIGS. 5 (A) and 6 (A). In this case, you may manufacture using the above-mentioned metal mold | die as needed. Also, the cage shown in FIG. 2 may be manufactured by manufacturing the cage shown in FIG. 15 and then opening the closed end surface with a punch or the like so as to have a predetermined inner diameter.

  In the above embodiment, the rolling bearing is a roller with a cage. However, the present invention is not limited to this, and the rolling bearing is also applied to a rolling bearing provided with race rings such as an inner ring and an outer ring.

  As mentioned above, although embodiment of this invention was described with reference to drawings, this invention is not limited to the thing of embodiment shown in figure. Various modifications and variations can be made to the illustrated embodiment within the same range or equivalent range as the present invention.

  The cage according to the present invention is effectively used when it is used in a situation where the restriction of movement in the axial direction is required and the both ends of the roller are in different lubricating states.

  The rolling bearing according to the present invention is effectively used for a rolling bearing that requires a long life.

It is sectional drawing at the time of cut | disconnecting the rolling bearing provided with the holder | requirement which concerns on one Embodiment of this invention in the cross section containing a column part. It is a perspective view which shows the holder | retainer which concerns on one Embodiment of this invention. It is a perspective view which shows the rolling bearing which integrated the roller in the holder | retainer shown in FIG. It is sectional drawing which shows the state which has arrange | positioned the rotating shaft which has a step part in the internal diameter side of the rolling bearing shown in FIG. It is a flowchart which shows the typical manufacturing process at the time of manufacturing the holder | retainer which concerns on one Embodiment of this invention. It is a schematic sectional drawing of the process of forming a cylindrical member from a steel plate, and shows (A) deep drawing process, (B) drilling process, (C) burring process, and (D) trimming process. It is a schematic sectional drawing which shows a spreading jig. It is the figure which looked at the state which combined the split mold from the axial direction. It is a figure which shows the state which moved the 1st metal mold | die to the internal diameter side. It is a figure which shows the state which moved the 2nd metal mold | die to the up-down direction. It is a schematic sectional drawing which shows a necking jig. It is the figure which looked at the state which combined the split mold from the axial direction. It is a schematic sectional drawing which shows a decision jig. It is a longitudinal cross-sectional view of the 2-cycle engine which used the roller with a retainer for the big end part of a connecting rod. It is sectional drawing at the time of cut | disconnecting the rolling bearing provided with the holder | requirement which concerns on other embodiment of this invention in the cross section containing a column part.

Explanation of symbols

  11,81 cage, 12a, 12b, 82a, 82b annular part, 13,83 pocket, 14,84 pillar part, 15,85 center part, 16, 30, 34a, 34b end part, 17a, 17b flange, 18a, 18b, 23a, 23b, 37a, 37b, 86 collar, 18c surface, 18d wide surface, 19, 67, 91 rolling bearing, 20, 92 rollers, 20a rotating shaft, 20b stepped portion, 20c end surface, 20d retaining ring, 21 Steel plate, 22, bottom, 24 side, 25 cylindrical member, 26 spreading tool, 27 first mold, 27a, 27b, 27c, 27d, 40a, 40b, 40c, 40d, 40e, 40f, 40g, 40h Split mold, 27e Seventh mold, 28a, 28b Second mold, 29 Moving jig, 31 First inclined part, 32 Convex part, 33, 43 Diameter, 35, 45 Recess, 36, 42 Outer surface, 38 Necking jig, 39a, 39b Third mold, 40 Fourth mold, 41 Insertion jig, 44 Second inclined section, 46 Third Inclined portion, 47 fixing jig, 48a, 48b fifth mold, 49 sixth mold, 50, 51 plane, 612 two-cycle engine, 62 cylinder, 63 crank chamber, 64 crankshaft, 65 connecting rod, 66 piston, 68 Intake hole, 69 Exhaust hole, 70 Combustion chamber, 71 Rotation center axis, 72 Balance weight, 73 Piston pin, 74 Large end, 75 Small end, 87 Closed end face.

Claims (5)

A plurality of pillars having a pair of annular portions each provided with a flange portion bent toward the inner diameter side and a pair of the annular portions so as to form a plurality of pockets for holding the rollers, and whose central portions are recessed toward the inner diameter side. A cage comprising a portion,
A cage in which an inner diameter dimension of one collar is different from an inner diameter dimension of the other collar. From both opening sides of the cylindrical member, the side portion of which is straight in the axial direction, insert a pushing mold that has a concave portion that is recessed in the radial direction and moves in the axial direction of the cylindrical member, and remove the cylindrical member. Push it to the radial side,
The cage according to claim 1, wherein the cage portion of the cylindrical member that has been spread out is manufactured by being bent toward the inner diameter side by a bending mold that moves in the axial direction of the cylindrical member. A cage comprising a pair of annular portions and a pair of annular portions connected so as to form a plurality of pockets for holding rollers, and a plurality of column portions whose central portions are recessed toward the inner diameter side,
Of the pair of annular portions, one annular portion includes a flange portion bent toward the inner diameter side,
The other annular portion has a closed end surface, and is a cage. The cage according to any one of claims 1 to 3, wherein the cage is manufactured by a transfer press. A rolling bearing comprising the cage according to any one of claims 1 to 4 and a roller.

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