JP2014005918A - Shell type roller bearing, and shell type roller bearing manufacturing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a shell type roller bearing that can improve accuracy of a bearing constituting member and that can be manufactured inexpensively.SOLUTION: A shell type needle-like roller bearing is manufactured as follows. A retainer member (34) that is not subjected to heat treatment and on which a pocket (35) is formed, is arranged on an inside diameter side of an annular shell type outer ring member (31) that is not subjected to heat treatment. Both of outer ring collar sections (32a, 32b) are formed on the shell type outer ring member (31) on the inside diameter side of which the retainer member (34) is arranged. Heat treatment is applied to the shell type outer ring member (31) and the retainer member (34), and a needle-like roller that is subjected to heat treatment is incorporated from the inside diameter side of the pocket (35).

Description

  The present invention relates to a shell-type roller bearing and a method for manufacturing a shell-type roller bearing.

  In some cases, a shell-type needle roller bearing that can withstand an impact or a high load and receives a load by line contact is used for an automobile transmission or the like. The shell-type needle roller bearing includes a shell-type outer ring having both flange portions extending toward the inner diameter side at both axial ends, a plurality of needle rollers, and a cage that holds the plurality of needle rollers. Here, the manufacturing method of the shell type needle roller bearing at the time of manufacturing the shell type needle roller bearing having such a configuration is disclosed in Japanese Patent No. 3073937 (Patent Document 1).

Patent No. 3073937

  A conventional method for manufacturing a shell needle roller bearing will be briefly described. 12 and 13 are cross-sectional views showing a part of a process in a conventional method for manufacturing a shell needle roller bearing, and are cross-sectional views of a shell-shaped outer ring and a cage.

Referring to FIG. 12, shell-shaped outer ring member 101 is prepared in which outer ring flange 102 on one side is formed and heat treatment, specifically, quenching is performed on the entire surface. In this shell-shaped outer ring member 101, the other end 105 not forming the outer ring collar portion is annealed to enable bending after the cage 104 is incorporated. A cage 104 in which a needle roller 103 is accommodated in a pocket is incorporated on the inner side of such a shell-shaped outer ring member 101. In this case, still incorporating the cage 104 in the direction indicated by the arrow X ₁ in FIG. 12 from the other side not forming the outer ring flange portion. Note that heat treatment has already been performed on the cage 104 and the needle rollers 103. Referring now to FIG. 13, after incorporating the retainer 104, the end 105 subjected to annealing by bending the inner diameter side as shown by the arrow X ₂ in FIG. 13, the outer ring flange portion on the other side Form. Conventionally, the shell needle roller bearing 106 has been manufactured in this manner.

  However, according to such a manufacturing method, after the heat treatment of the entire shell-shaped outer ring, the end part in the axial direction that has been annealed is bent to form the outer ring flange part on the other side, The heat treatment histories of the outer ring collar part and the outer ring collar part on the other side are different. If it does so, the nonuniformity of the hardness will arise between both outer ring collar parts, and this point might be a problem. Specifically, the hardness of the outer ring flange portion on the side subjected to annealing was low, and the hardness was insufficient. Further, due to the bending of the end portion in the axial direction after the heat treatment, the roundness of the outer diameter surface of the shell-shaped outer ring is low. Since the shell type outer ring is used by being press-fitted into an engagement hole (not shown) provided in a housing (not shown), the roundness of the outer diameter surface of the shell type outer ring is higher. Is desirable.

  Here, according to Patent Document 1, a shell-shaped outer ring having only one end bent inward in the radial direction is formed into a predetermined shape when assembled in an unquenched state, and then quenched and tempered. Assembling a bearing by incorporating a finished or unquenched needle roller, and then bending the other end of the shell-shaped outer ring radially inward to form a flange, followed by carbonitriding with respect to the assembled bearing It is supposed to be treated and further quenched and tempered. According to such Patent Document 1, since the shell-shaped outer ring and the cage are both heat-treated, the number of processes is expected to be reduced, and the manufacturing can be performed with a simple manufacturing process.

  However, if the needle rollers have been heat-treated in advance, the needle rollers will be heat-treated twice. Such a situation may cause heat treatment deformation of the needle rollers, which is not preferable. In particular, when the bearing size becomes large or becomes a wide product, there is a tendency that the influence of heat treatment deformation in the heat treatment of the needle roller twice is increased.

  An object of the present invention is to provide a shell-type roller bearing that can improve the accuracy of bearing components and can be manufactured at low cost.

  Another object of the present invention is to provide a method for manufacturing a shell-type roller bearing that improves the accuracy of the bearing component and enables inexpensive manufacturing.

  A shell-type roller bearing according to the present invention includes a shell-type outer ring having both outer ring flange portions formed by bending both end edges in the axial direction to the inner diameter side, and a plurality of rollers rolling on the inner diameter surface of the shell-type outer ring, A shell-type roller bearing including a plurality of column portions that connect a pair of annular portions so as to form a pair of annular portions and a pocket that accommodates the plurality of rollers, and a cage that holds the rollers. Here, in the shell-type roller bearing, a cage member that is not heat-treated and formed with a pocket is disposed on the inner diameter side of the annular shell-shaped outer ring member that is not heat-treated, and the cage member is disposed on the inner-diameter side. Both outer ring collars are formed on the shell-shaped outer ring member, the shell-shaped outer ring member and the cage member are heat-treated, and the heat-treated rollers are assembled from the inner diameter side of the pocket.

  The shell-type roller bearing having such a structure is manufactured by heat-treating the shell-shaped outer ring member and the cage member, both of which are not heat-treated, and then storing the roller in a pocket. No heat treatment is performed over the entire period. Therefore, the heat treatment deformation of the roller due to the second heat treatment is not caused. Also, since the cage member is arranged on the inner diameter side of the shell-shaped outer ring member and both the outer ring collar portions are formed, the shell-shaped outer ring member and the cage member are heat treated, so the outer ring collar portion is formed after the heat treatment. It is not necessary to perform the steps such as annealing, and the number of steps can be reduced. Furthermore, the hardness of one outer ring flange portion is not lowered, and the roundness of the outer diameter surface of the outer ring due to the formation of the outer ring flange portion after annealing can be prevented. Therefore, such a shell-type roller bearing can improve the precision of a bearing structural member and can be manufactured at low cost. Here, the shell-shaped outer ring member is not subjected to heat treatment, at least one outer ring flange part is not formed, and the outer ring flange part is formed and heat-treated later to form the shell-shaped outer ring. Means an annular member. The cage member means a member constituting the cage by a subsequent heat treatment.

  Further, the side wall surface of the pillar portion forming the pocket is provided with a roller stopper for preventing the roller accommodated in the pocket from falling off to the inner diameter side, and the pocket around the portion where the roller stopper is provided is provided. You may comprise so that the space | interval of a direction may be 0.05-0.4 mm smaller than the diameter of a roller.

  Further, the cage may be configured to be an outer diameter guide.

  Further, in a cross section cut by a plane parallel to the rotation axis of the cage and including the rotation axis, the pillar portion extends inward from the pair of annular portions along the rotation axis of the cage. A pair of inclined portions extending from the inner end of each of the pair of extending portions and extending inclining with respect to the rotation axis of the cage, and the inner ends of the pair of inclined portions And a connecting portion extending along the rotation axis of the cage.

  In addition, the cage may include a cage inner diameter side flange that extends toward the inner diameter side from both axial end portions of the pair of annular portions.

  Moreover, you may comprise a cage | basket so that the cage | basket outer-diameter side collar part extended to an outer-diameter side from the both ends of the axial direction of a pair of annular part may be respectively included.

  In another aspect of the present invention, a method of manufacturing a shell-type roller bearing includes: a shell-type outer ring having both outer ring flange portions formed by bending both end edges in the axial direction toward an inner diameter side; and an inner diameter surface of the shell-type outer ring. A shell type comprising a plurality of rollers that roll, a pair of annular portions, and a plurality of pillar portions that connect the pair of annular portions so as to form a pocket that accommodates the plurality of rollers, and a cage that holds the rollers. It is a manufacturing method of a roller bearing. Here, the manufacturing method of the shell-shaped roller bearing includes a step of arranging a cage member that is not heat-treated and formed with a pocket on an inner diameter side of an annular shell-shaped outer ring member that is not heat-treated, and a cage member Forming both outer ring collars on a shell-shaped outer ring member arranged on the inner diameter side, a step of heat-treating the shell-shaped outer ring member and the cage member, and a step of incorporating the heat-treated rollers from the inner diameter side of the pocket Including.

  Such a method of manufacturing a shell-type roller bearing improves the accuracy of the bearing component and enables inexpensive manufacturing.

  The shell-type roller bearing and the method for manufacturing the shell-type roller bearing having such a structure are manufactured by heat-treating the shell-shaped outer ring member and the cage member, both of which are not heat-treated, and then storing the rollers in pockets. Therefore, heat treatment is not performed twice on the rollers. Therefore, the heat treatment deformation of the roller due to the second heat treatment is not caused. Also, since the cage member is arranged on the inner diameter side of the shell-shaped outer ring member and both the outer ring collar portions are formed, the shell-shaped outer ring member and the cage member are heat treated, so the outer ring collar portion is formed after the heat treatment. It is not necessary to perform the steps such as annealing, and the number of steps can be reduced. Furthermore, the hardness of one outer ring flange portion is not lowered, and the roundness of the outer diameter surface of the outer ring due to the formation of the outer ring flange portion after annealing can be prevented. Therefore, the shell-type roller bearing and the method for manufacturing the shell-type roller bearing can improve the accuracy of the bearing component and can be manufactured at low cost.

It is sectional drawing which shows a part of shell type needle roller bearing which concerns on one Embodiment of this invention. It is an expanded sectional view which expands and shows a part of shell type needle roller bearing shown in FIG. It is a flowchart which shows the typical process in the manufacturing method of the shell type needle roller bearing which concerns on one Embodiment of this invention. It is sectional drawing which shows a part of shell-shaped outer ring member and cage member at the time of manufacturing the shell-type needle roller bearing according to one embodiment of the present invention, and arranges the cage member on the inner diameter side of the shell-type outer ring member. Indicates the state of the It is sectional drawing which shows a part of shell shape outer ring member and cage member at the time of manufacturing the shell type needle roller bearing concerning one embodiment of this invention, and has formed both outer ring collar parts of the shell type outer ring member Indicates. It is sectional drawing which shows a part of shell-shaped outer ring member at the time of manufacturing the shell-shaped needle roller bearing which concerns on one Embodiment of this invention, and a cage member, and shows the state which bites a needle roller in a pocket. It is sectional drawing which shows a part of shell type needle roller bearing which concerns on other embodiment of this invention. It is sectional drawing which shows a part of shell type needle roller bearing which concerns on other embodiment of this invention. It is sectional drawing which shows a part of shell type needle roller bearing which concerns on other embodiment of this invention. It is sectional drawing which shows a part of shell type needle roller bearing which concerns on other embodiment of this invention. It is an expanded sectional view which expands and shows a part of shell type needle roller bearing shown in FIG. It is sectional drawing which shows a part of shell shape outer ring member and cage member at the time of manufacturing the conventional shell type needle roller bearing, and shows a state where the cage member is arranged on the inner diameter side of the shell type outer ring member. It is sectional drawing which shows a shell-shaped outer ring member and a part of cage member at the time of manufacturing the conventional shell-type needle roller bearing, and shows a state in which both outer ring collar portions of the shell-shaped outer ring member are formed.

  Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view showing a part of a shell needle roller bearing according to an embodiment of the present invention. FIG. 2 is an enlarged cross-sectional view showing a part of the shell needle roller bearing shown in FIG. FIG. 2 corresponds to an enlarged view of the cage and needle rollers provided in the shell needle roller bearing shown in FIG. 1 cut along the II-II section shown in FIG. In addition, FIG. 1 is a plane along the rotation axis of the cage provided in the shell needle roller bearing and corresponds to a cross section cut along a plane including the rotation axis of the cage. In FIG. 1, the upper side of the paper corresponds to a cross section cut by a plane including a column part described later, and the lower side of the paper corresponds to a cross section cut by a plane including a pocket described later. In FIG. 1, the rotation axis 17 of the cage is indicated by a one-dot chain line. In FIG. 2, a roller PCD (Pitch Circle Diameter) 18 which is the diameter of the pitch circle of the needle roller is indicated by a two-dot chain line. 12 and 13 described above corresponds to the cross section shown in FIG.

  Referring to FIGS. 1 and 2, a shell needle roller bearing 11 according to an embodiment of the present invention holds a shell outer ring 12, a plurality of needle rollers 15, and a plurality of needle rollers. And a vessel 21. The shell needle roller bearing 11 is used, for example, in an automobile transmission.

  The shell-shaped outer ring 12 has both outer ring flange portions 13a and 13b formed by bending both end edges in the axial direction to the inner diameter side. The wall thickness of the outer ring flange portion 13b on the other side is configured to be slightly thinner than the wall thickness of the outer ring flange portion 13a on the one side, and is easily bent. Both the outer ring flange portions 13a and 13b have a shape extending straight toward the inner diameter side. That is, the outer ring flange portions 13 a and 13 b have a shape in which both end edges in the axial direction of the shell-shaped outer ring 12 are bent in the axial direction, in this case, in a direction perpendicular to the direction of the rotation axis 17 of the cage 21. Each outer ring collar part 13a, 13b has a shape that is continuous in an annular shape.

  The inner diameter surface 14 of the shell-shaped outer ring 12 becomes a rolling surface on which the needle rollers 15 roll. That is, the rolling surface 16 of the needle roller 15 is configured to contact the inner diameter surface 14 of the shell-shaped outer ring 12. The outer diameter surface 19 of the shell-shaped outer ring 12 has a straight shape in the axial direction from the viewpoint of press-fitting into an engagement hole (not shown) of a housing (not shown). That is, the outer diameter surface 19 of the shell-shaped outer ring 12 is cylindrical in the circumferential direction, has no irregularities in the axial direction, and has a shape that extends straight in the direction of the rotation axis 17 of the cage 21. For the outer diameter surface 19 of the shell-shaped outer ring 12, for example, considering the appropriate press-fitting into the engagement hole of the housing and the influence on the inner diameter surface 14 at the time of press-fitting, the outer diameter surface 19 of the shell-shaped outer ring 12 It is required that the roundness of is high, that is, closer to a perfect circle.

  The cage 21 that holds the plurality of needle rollers 15 connects the pair of annular portions 22 a and 22 b so as to form a pair of annular portions 22 a and 22 b and a pocket 23 that houses the plurality of needle rollers 15. Column parts 24a and 24b. The one-side annular portion 22a is located on the one-side outer ring flange portion 13a side, and the other-side annular portion 22b is located on the other-side outer ring flange portion 13b side.

  The column portion 24a is a pair of annular members along the rotation axis 17 of the cage 21 in the cross section shown in FIG. 1, that is, in a cross section cut along a plane parallel to the rotation axis 17 of the cage 21 and including the rotation axis 17. A pair of extending portions 25a and 25b extending inward from the portions 22a and 22b, respectively, and a rotation axis 17 of the cage 21 connected from the inner ends of the pair of extending portions 25a and 25b. A pair of inclined portions 26a, 26b extending in an inclined manner, and a connecting portion 27 extending along the rotation axis 17 of the cage 21 so as to connect the inner ends of the pair of inclined portions 26a, 26b. including. That is, the shape of the cage 21 is a so-called V-shaped cross section.

  The cage 21 is a welded cage. In other words, the cage 21 is a cage in which a steel strip is cut into a predetermined length, bent into a cylindrical shape, and ends are connected by welding.

  In the retainer 21, the side wall surfaces 28a and 28b of the adjacent column portions 24a and 24b forming the pocket 23 are provided with roller stoppers 29a for preventing the needle rollers 15 accommodated in the pocket 23 from falling off to the inner diameter side. 29b. Here, the cage 21 is configured such that the above-described shape, specifically, the pillar portion 24a includes a pair of extending portions 25a and 25b, a pair of inclined portions 26a and 26b, and a connecting portion 27. . And since the column part 24a is diameter-reduced in the internal diameter side part of the connection part 27 which became the shape dented in the internal diameter side, the internal diameter side part of the connection part 27 becomes the roller stopper parts 29a and 29b.

Here, roller stoppers 29a, the circumferential spacing L ₁ of the 29b portion provided with pockets 23 is configured slightly smaller than the diameter L ₂ of needle rollers 15. Specifically, roller stoppers 29a, the circumferential spacing _{L 1} of the 29b portion provided with pockets 23 is configured to 0.05~0.4mm smaller than the diameter _{L 2} of the needle roller 15 ing. Note that the rolling axis 30 of the needle roller 15 passes through the roller PCD 18.

  Next, a method for manufacturing the shell needle roller bearing 11 according to one embodiment of the present invention will be described. FIG. 3 is a flowchart showing typical steps in the method for manufacturing the shell needle roller bearing 11 according to the embodiment of the present invention. FIG. 4 is a cross-sectional view showing a part of the shell-shaped outer ring member and the cage member, and shows a state where the cage member is arranged on the inner diameter side of the shell-shaped outer ring member. FIG. 5 is a cross-sectional view showing a part of the shell-shaped outer ring member and the cage member, and shows a state in which both outer ring collar portions of the shell-shaped outer ring member are formed. FIG. 6 is a cross-sectional view showing a part of the shell-shaped outer ring member and the cage member, and shows a state in which the needle rollers are pushed into the pockets. 4, FIG. 5, and FIG. 6 correspond to the cross section shown in FIG.

  First, referring to FIGS. 1 to 4, a shell-shaped outer ring member 31 in which only one outer ring flange portion 32 a is formed is prepared. In this case, for example, deep drawing of a steel plate may be performed to form the shell-shaped outer ring member 31 in which only one outer ring flange portion 32a is formed, or one side of the cylindrical member may be formed. The end portion may be bent toward the inner diameter side to form the outer ring flange portion 32a on one side. Here, the end 33 on the other side is formed thin so that it can be easily bent later. At this stage, the shell-shaped outer ring member 31 is not subjected to heat treatment such as quenching.

And the retainer member 34 in which the heat treatment is not performed and the pocket 35 is formed is disposed on the inner diameter side of the shell-shaped outer ring member 31 (FIG. 3A). In this case, the cage member 34 is arranged so as to be inserted from the side where the outer ring collar portion 32a is not formed, that is, from the other end 33 side before bending. Specifically, from the outer side in the axial direction of the shell-shaped outer ring member 31, to insert the retainer member 34 in the direction indicated by the arrow A ₁ in FIG. In this case, since the outer ring collar portion is not formed in the shell-shaped outer ring member 31, the cage member 34 can be smoothly arranged on the inner diameter side of the shell-shaped outer ring member 31.

Next, referring also to FIG. 5, the other end portion 33 of the shell-shaped outer ring member 31 having the cage member 34 disposed on the inner diameter side is bent toward the inner diameter side, and the other outer ring flange portion 32 b is formed. It is formed (FIG. 3B). Specifically, by bending the other side of the end portion 33 of the shell-shaped outer ring member 31 in the direction indicated by arrow A ₂ in FIG. 4, forms the other side of the outer ring flange portion 32b. As a result, both outer ring flange portions 32a and 32b are formed on both sides of the shell-shaped outer ring member 31 in the axial direction.

  Next, heat treatment is performed on the shell-shaped outer ring member 31 in which the cage member 34 is disposed on the inner diameter side. That is, the shell-shaped outer ring member 31 and the cage member 34 are both heat-treated (FIG. 3C). In this case, specifically, quenching is performed. Also, annealing is not performed. The thickness of the outer ring flange portion 32a on one side and the outer ring flange portion 32b on the other side are different, and the thickness of the outer ring flange portion 32b on the other side is larger than the thickness of the outer ring flange portion 32a on the one side. Although both are thin, both are hardened under the same conditions, and are uniform in terms of the hardness of both outer ring flange portions 32a and 32b. In this way, the shell-shaped outer ring 12 and the cage 21 are completed as bearing components.

Next, referring also to FIG. 6, needle rollers 15 are prepared by the number of pockets 23 provided in the cage 21 by separately performing a heat treatment. Then, the needle rollers 15 are incorporated from the inner diameter side of the pocket 23 into the cage 21 that has been heat-treated. In this case, the inner diameter side needle roller 15, i.e., so as to Komu Achieved from a direction indicated by arrow A ₃ in FIG. 6 is housed in the pocket 23 (FIG. 3 (D)). In this manner, the needle rollers 15 are sequentially incorporated into all the pockets 23 to manufacture the shell needle roller bearing 11 according to one embodiment of the present invention.

  In the manufacturing method of the shell-type roller bearing 11 and the shell-type roller bearing 11 having such a configuration, the shell-shaped outer ring member 31 and the cage member 34 that are not heat-treated are both heat-treated, and then the needle rollers 15 are inserted into the pockets 23. Therefore, the needle roller 15 is not heat-treated twice. Accordingly, the heat treatment deformation of the needle roller 15 due to the second heat treatment is not caused. Further, since the cage member 34 is disposed on the inner diameter side of the shell-shaped outer ring member 31 and the shell-shaped outer ring member 31 and the cage member 34 are heat-treated after forming both outer ring flange portions 32a and 32b, It is not necessary to form the outer ring flange portions 32a and 32b after the heat treatment, and a step such as annealing is unnecessary, and the number of steps can be reduced. Further, the hardness of one outer ring flange portion is not lowered, and the decrease in the roundness of the outer diameter surface 19 of the shell-shaped outer ring 12 due to the formation of the outer ring flange portion after annealing is prevented. be able to. Therefore, the manufacturing method of the shell roller bearing 11 and the shell roller bearing 11 as described above is based on the accuracy of the bearing component, specifically, the roundness of the outer diameter surface 19 of the shell outer ring 12 and the needle roller 15. The dimensional accuracy of the outer shape can be improved and can be manufactured at low cost.

In this case, roller stoppers 29a, the circumferential spacing _{L 1} of the pocket 23 of the portion 29b is provided is configured to 0.05~0.4mm smaller than the diameter _{L 2} of the needle roller 15 Therefore, the needle roller 15 can be appropriately inserted into the pocket 23. That is, the needle roller 15 can be accommodated in the pocket 23 without causing surface damage or the like of the rolling surface 16 of the needle roller 15 by utilizing elastic deformation of the column portion 24a or the like of the cage 21. . In this case, since the inner diameter surface 14 of the shell-shaped outer ring 12 is located on the outer diameter side, the needle roller 15 does not fall off on the outer diameter side.

  Further, in this case, since a welded cage is employed as the cage 21, a roller stopper 29a on the inner diameter side having a shape protruding from the side wall surfaces 28a, 28b of the adjacent column portions 24a, 24b to the pocket 23 side, respectively. 29b need not be formed anew, so that the process can be further simplified.

  Further, in this case, since the shape of the cage 21 is V-shaped in cross section, the oil permeability as the shell needle roller bearing 11 can be increased.

  It should be noted that the cage provided in the shell needle roller bearing may be an outer diameter guide. FIG. 7 is a sectional view showing a part of the shell needle roller bearing in this case. FIG. 7 corresponds to the cross section shown in FIG. 1, but corresponds to a cross section cut along a plane including the column part on both the upper and lower sides of the drawing.

  Referring to FIG. 7, the basic configuration of a shell needle roller bearing 36 according to another embodiment of the present invention is the same as that of shell needle roller bearing 11 shown in FIG. The shell-shaped needle roller bearing 36 rolls on a shell-shaped outer ring 37 having both outer ring flange portions 38 a and 38 b formed by bending both end edges in the axial direction toward the inner diameter side, and an inner diameter surface 39 of the shell-shaped outer ring 37. A plurality of needle rollers 40, a pair of annular portions 41a, 41b, and a plurality of column portions 43 that connect the pair of annular portions 41a, 41b so as to form a pocket 42 that accommodates the plurality of needle rollers 40; And a holder 44 for holding the needle rollers 40. The column portion 43 includes a pair of extending portions 46a and 46b extending inward from the pair of annular portions 41a and 41b along the rotation axis 45 of the cage 44, and a pair of extending portions 46a and 46b. A pair of inclined portions 47a and 47b extending from the inner side end portion and inclined with respect to the rotation axis 45 of the retainer 44 are connected to the inner side end portions of the pair of inclined portions 47a and 47b. As described above, a connecting portion 48 extending along the rotation axis 45 of the cage 44 is included.

  Here, the cage 44 is an outer diameter guide. Specifically, in the cage 44, the outer diameter surfaces 49a and 49b of the pair of annular portions 41a and 41b and the outer diameter surfaces 50a and 50b of the pair of extension portions 46a and 46b are used for bearing operation. In some cases, the inner surface 39 of the shell-shaped outer ring 37 abuts.

  Further, the shell needle roller bearing 36 is not heat-treated on the inner diameter side of the annular shell-shaped outer ring member that has not been heat-treated, similarly to the shell needle roller bearing 11 shown in FIG. 1 described above. A cage member in which a pocket is formed is arranged, both outer ring collars are formed on a shell-type outer ring member in which the cage member is arranged on the inner diameter side, and heat treatment is performed on the shell-type outer ring member and the cage member. It is manufactured by incorporating a needle roller from the inside diameter side of the pocket.

  By doing so, in addition to the effects of the shell needle roller bearing 11 shown in FIG. 1 described above, the rigidity of the shell-shaped outer ring 37 is high. Specifically, the hardness is uniform in both outer ring flange portions 38a and 38b. Therefore, even when eccentric rotation is performed in which the load applied to the cage 44 increases, it is possible to sufficiently cope with this.

  In the above embodiment, the cage is configured to have a so-called V-shaped cross section. However, the shape of the cage is not limited to this, and the cage is configured to have a so-called M-shaped cross section. May be.

  FIG. 8 is a sectional view showing a part of the shell needle roller bearing in this case. FIG. 8 corresponds to the cross section shown in FIG. 1 and FIG. Referring to FIG. 8, the basic configuration of shell needle roller bearing 51 according to still another embodiment of the present invention is the same as that of shell needle roller bearing 11 shown in FIG. The shell-shaped needle roller bearing 51 rolls on a shell-shaped outer ring 52 having both outer ring flange portions 53a and 53b formed by bending both end edges in the axial direction toward the inner diameter side, and an inner diameter surface 54 of the shell-shaped outer ring 52. A plurality of needle rollers 55, a pair of annular portions 56a, 56b, and a plurality of column portions 58 that connect the pair of annular portions 56a, 56b so as to form a pocket 57 that accommodates the plurality of needle rollers 55; And a cage 59 for holding the needle rollers 55. The column portion 58 includes a pair of extending portions 61a and 61b extending inward from the pair of annular portions 56a and 56b along the rotation axis 60 of the cage 59, and a pair of extending portions 61a and 61b. A pair of inclined parts 62a and 62b that extend from the inner side end part and incline with respect to the rotation axis 60 of the retainer 59 are connected to inner side end parts of the pair of inclined parts 62a and 62b. As described above, a connecting portion 63 extending along the rotation axis 60 of the cage 59 is included.

  Here, the retainer 44 has an M-shaped cross section. Specifically, the cage 44 has ends 64a and 64b on the axially outer side of the pair of annular portions 56a and 56b, that is, ends on which the pair of extending portions 61a and 61b are not provided. A pair of cage inner diameter flanges 65a and 65b extending from the portions 64a and 64b to the inner diameter side are provided. Each of the cage inner diameter flange portions 65a and 65b has a shape extending straight toward the inner diameter side. That is, the cage inner diameter flanges 65a and 65b have a shape in which both end edges in the axial direction of the shell-shaped outer ring 52 are bent in the axial direction, in this case, in the direction perpendicular to the direction of the rotation axis 60 of the cage 59. Each cage inner diameter flange 65a, 65b has an annular shape.

  In addition, the shell needle roller bearing 51 is not heat-treated on the inner diameter side of the annular shell-shaped outer ring member that has not been heat-treated, similarly to the shell needle roller bearing 11 shown in FIG. 1 described above. A cage member in which a pocket is formed is arranged, both outer ring collars are formed on a shell-type outer ring member in which the cage member is arranged on the inner diameter side, and heat treatment is performed on the shell-type outer ring member and the cage member. It is manufactured by incorporating a needle roller from the inside diameter side of the pocket.

  By comprising in this way, the rigidity of the part except the pillar part 58 among the holder | retainer 44, ie, the part connected in an annular | circular shape in the circumferential direction containing a pair of annular parts 56a and 56b can be made high. Accordingly, the rigidity of the shell needle roller bearing 51 can be further increased.

  Furthermore, the shape of the cage is not limited to the above-described shape, and may be configured to have a so-called UV-shaped cross section.

FIG. 9 is a sectional view showing a part of the shell needle roller bearing in this case. 9 corresponds to the cross section shown in FIG. 1, FIG. 7, and FIG. Referring to FIG. 9, the basic configuration of shell needle roller bearing 66 according to still another embodiment of the present invention is the same as that of shell needle roller bearing 11 shown in FIG. The shell-shaped needle roller bearing 66 rolls on a shell-shaped outer ring 67 having both outer ring flange portions 68 a and 68 b formed by bending both end edges in the axial direction toward the inner diameter side, and an inner diameter surface 69 of the shell-shaped outer ring 67. A plurality of needle rollers 70, a pair of annular portions 71a, 71b, and a plurality of column portions 73 that connect the pair of annular portions 71a, 71b so as to form a pocket 72 that accommodates the plurality of needle rollers 70; And a cage 74 for holding the needle roller 70. The column portion 73 includes a pair of extending portions 76a and 76b extending inward from the pair of annular portions 71a and 71b along the rotation axis 75 of the cage 74, and a pair of extending portions 76a and 76b. A pair of inclined portions 77a and 77b that extend from the inner side end portion and incline with respect to the rotation axis 75 of the retainer 74 are connected to inner side ends of the pair of inclined portions 77a and 77b. As described above, a connecting portion 78 extending along the rotation axis 75 of the retainer 74 is included. The diameter of the needle roller 70 shown by the length L ₃ in FIG. 9 is larger than the diameter of the needle roller 15 shown by the length L ₂ in the FIG.

  Here, the cage 74 has a UV-shaped cross section. Specifically, the cage 74 has ends 79a and 79b on the outer side in the axial direction of the pair of annular portions 71a and 71b, that is, ends on which the pair of extending portions 76a and 76b are not provided. A pair of cage outer diameter flanges 80a and 80b extending from the portions 79a and 79b to the inner diameter side are provided. Each of the cage outer diameter flanges 80a and 80b has a shape extending straight to the outer diameter side. That is, the cage outer diameter flange portions 80a and 80b are formed by bending both axial edges of the shell-shaped outer ring 67 in the axial direction, in this case, in a direction perpendicular to the direction of the rotation axis 75 of the cage 74. . Each cage outer diameter flange 80a, 80b has an annularly continuous shape.

  Further, the shell-shaped needle roller bearing 66 is not heat-treated on the inner diameter side of the annular shell-shaped outer ring member that has not been heat-treated, similar to the shell-shaped needle roller bearing 11 shown in FIG. A cage member in which a pocket is formed is arranged, both outer ring collars are formed on a shell-type outer ring member in which the cage member is arranged on the inner diameter side, and heat treatment is performed on the shell-type outer ring member and the cage member. It is manufactured by incorporating a needle roller from the inside diameter side of the pocket.

  By comprising in this way, the length dimension of the radial direction of a holder | retainer can be ensured long, and it can respond even if it is a so-called thick needle roller. Further, even if the outer ring collar portion has a short length in the radial direction, movement of the cage in the axial direction can be restricted by contact between the cage outer diameter collar portion and the outer ring collar portion. Furthermore, oil permeability can also be improved.

  Moreover, as said embodiment, although we decided to employ | adopt a welded cage as a retainer, you may decide to employ | adopt not only this but types other than a welded retainer.

  FIG. 10 is a cross-sectional view showing a part of the shell needle roller bearing in this case. FIG. 10 corresponds to an enlarged view when a part of the cross section shown in FIGS. 1, 7, and 8 is enlarged, specifically, when it is cut along a plane including a pillar portion. FIG. 11 is an enlarged sectional view showing a part of the shell needle roller bearing shown in FIG. 1 in an enlarged manner. FIG. 11 corresponds to an enlarged view of the cage and needle rollers provided in the shell needle roller bearing shown in FIG. 10 cut along the XI-XI cross section shown in FIG. 10 and 11, the shell-shaped outer ring is not shown. In FIG. 11, the roller PCD 90 is indicated by a two-dot chain line.

  Referring to FIGS. 10 and 11, the basic configuration of shell needle roller bearing 81 according to still another embodiment of the present invention is the same as that of shell needle roller bearing 11 shown in FIG. . The shell-shaped needle roller bearing 81 includes a shell-shaped outer ring having both outer ring flange portions formed by bending both end edges in the axial direction toward the inner diameter side, and a plurality of needle rollers 82 that roll on the inner diameter surface of the shell-shaped outer ring. And a plurality of column portions 85a and 85b for connecting the pair of annular portions 83a and 83b so as to form a pocket 84 for accommodating the pair of annular portions 83a and 83b and the plurality of needle rollers 82. And a retainer 86 for retaining the. The column portion 85a includes a pair of extending portions 87a and 87b extending inward from the pair of annular portions 83a and 83b along a rotation axis (not shown) of the cage 86, and a pair of extending portions 87a, A pair of inclined portions 88a and 88b extending from the respective inner ends of 87b and extending inclined with respect to the rotation axis of the cage 86, and the inner ends of the pair of inclined portions 88a and 88b And a connecting portion 89a extending along the rotation axis of the cage 86 so as to connect the two. The cage 86 has an M-shaped cross section. That is, the cage 86 has end portions 91a and 91b on the outer side in the axial direction of the pair of annular portions 83a and 83b, that is, end portions 91a on the side where the pair of extending portions 87a and 87b are not provided. A pair of cage inner diameter flanges 92a and 92b extending from 91b to the inner diameter side are provided. Note that the rolling axis 93 of the needle roller 82 passes through the roller PCD 90.

Here, in the retainer 86, rollers that prevent the needle rollers 82 accommodated in the pocket 84 from falling out on the inner diameter side are formed on the side wall surfaces 94 a and 94 b of the adjacent column portions 85 a and 85 b forming the pocket 84. Stop portions 95a and 95b are provided. Specifically, both the connecting portions 89a and 89b of the column portions 85a and 85b are shaped to protrude to the pocket 84 side. And the edge part of the outer diameter side in the side wall surfaces 94a and 94b of each connection part 89a and 89b becomes the roller stoppers 95a and 95b. Stop portion 95a, the circumferential spacing L ₄ of the pocket 84 of the portion 95b is provided around is configured slightly smaller than the diameter L ₂ of needle rollers 82. Specifically, stop portion 95a, the circumferential spacing _{L 4} of the pocket 84 of the portion 95b is provided around is adapted 0.05~0.4mm smaller than the diameter _{L 2} of the needle roller 82 ing.

  Further, the shell needle roller bearing 81 is not heat-treated on the inner diameter side of the annular shell-shaped outer ring member that has not been heat-treated, similarly to the shell needle roller bearing 11 shown in FIG. A cage member in which a pocket is formed is arranged, both outer ring collars are formed on a shell-type outer ring member in which the cage member is arranged on the inner diameter side, and heat treatment is performed on the shell-type outer ring member and the cage member. It is manufactured by incorporating a needle roller from the inside diameter side of the pocket.

  You may decide to comprise in this way. That is, it is good also as a structure which does not use the diameter reduction part at the time of bending a steel strip in the shape of a cylinder as the inner diameter side roller stop part, but protrudes the connection part located in the innermost diameter side among pillar parts to the pocket side.

  In the above embodiment, the roller stoppers are provided on the pillars located on both sides of the pocket. However, the present invention is not limited to this, and the roller stoppers are provided on the pillars located on one side of the pocket. It is good also as a structure which provides. Moreover, you may decide to make the roller stopper part protrude in the pocket side among some side wall surfaces of a pillar part.

  In the above embodiment, the shape of the cage is V-shaped, M-shaped, or UV-shaped. However, the shape of the cage is not limited to these shapes. The shape of this is also adopted. That is, for example, the column portion may have a shape extending straight in the direction of the rotation axis of the cage, or the connection portion may be positioned on the outermost diameter side among the respective portions constituting the column portion.

  In the above embodiment, the needle roller is used as the shell needle roller bearing. However, the present invention is not limited to this, and other rollers such as a cylindrical roller or a rod roller may be used. .

  In the above embodiment, the cage member is disposed on the inner diameter side of the shell-shaped outer ring member in which the outer ring collar portion on one side is formed in advance, and the end on the other side is bent after the cage member is disposed. However, the present invention is not limited to this, and after preparing a cylindrical shell-shaped outer ring member and arranging the cage member on the inner diameter side, bend both ends, Both outer ring collars may be formed.

  In the above-described embodiment, the case where the cage is the outer diameter guide has been described. However, the guide type of the cage may be the inner diameter guide or the rolling element guide as necessary.

  Although the embodiments of the present invention have been described with reference to the drawings, the present invention is not limited to the illustrated embodiments. Various modifications and variations can be made to the illustrated embodiment within the same range or equivalent range as the present invention.

  The shell type roller bearing and the manufacturing method of the shell type roller bearing according to the present invention are effectively used when high accuracy and low cost are required.

  11, 36, 51, 66, 81 Shell type needle roller bearing, 12, 37, 52, 67 Shell type outer ring, 13a, 13b, 32a, 32b, 38a, 38b, 53a, 53b, 68a, 68b Outer ring collar part, 14, 39, 54, 69 Inner surface, 15, 40, 55, 70, 82 Needle roller, 16 Rolling surface, 17, 45, 60, 75 Axis of rotation, 18, 90 rollers PCD, 19, 49a, 49b, 50a, 50b outer diameter surface, 21, 44, 59, 74, 86 cage, 22a, 22b, 41a, 41b, 56a, 56b, 71a, 71b, 83a, 83b annular part, 23, 35, 42, 57, 72 , 84 Pocket, 24a, 24b, 43, 58, 73, 85a, 85b Column, 25a, 25b, 46a, 46b, 61a, 61b, 76a, 76b, 87a, 87 Extension part, 26a, 26b, 47a, 47b, 62a, 62b, 77a, 77b, 88a, 88b Inclined part, 27, 48, 63, 78, 89a, 89b Connecting part, 28a, 28b, 94a, 94b Side wall surface, 29a, 29b, 95a, 95b Roller stopper, 30, 93 Rolling shaft center, 31 Shell type outer ring member, 33, 64a, 64b, 79a, 79b, 91a, 91b End, 34 Cage member, 65a, 65b, 92a, 92b Cage inner diameter flange, 80a, 80b Cage outer diameter flange.

Claims (7)

A shell-shaped outer ring having both outer ring flange portions formed by bending both end edges in the axial direction toward the inner diameter side, a plurality of rollers rolling on the inner diameter surface of the shell-shaped outer ring, a pair of annular portions, and a plurality of the rollers A shell-type roller bearing including a plurality of pillars connecting the pair of annular portions so as to form a pocket for accommodating the roller, and a cage for holding the rollers,
Arranged on the inner diameter side of the annular shell-shaped outer ring member that has not been heat-treated, a cage member that has not been heat-treated and formed with the pockets,
Forming both outer ring collars on the shell-shaped outer ring member having the cage member disposed on the inner diameter side;
Heat-treating the shell-shaped outer ring member and the cage member;
A shell-type roller bearing manufactured by incorporating a heat-treated roller from the inner diameter side of the pocket. On the side wall surface of the pillar portion forming the pocket, a roller stopper for preventing the roller accommodated in the pocket from falling off to the inner diameter side is provided,
The shell-type roller bearing according to claim 1, wherein an interval in a circumferential direction of the pocket in a portion provided with the roller stopper is 0.05 to 0.4 mm smaller than a diameter of the roller. The shell type roller bearing according to claim 1 or 2, wherein the cage is an outer diameter guide. In a cross section cut along a plane parallel to the rotation axis of the cage and including the rotation axis, the column portions extend inward from the pair of annular portions along the rotation axis of the cage, respectively. A pair of inclined portions extending from the inner end of each of the pair of extending portions and extending obliquely with respect to the rotation axis of the retainer, and a pair of the inclined portions. The shell-type roller bearing according to any one of claims 1 to 3, further comprising a connecting portion extending along a rotation axis of the cage so as to connect the end portions on the side. The shell type roller bearing according to any one of claims 1 to 4, wherein the cage includes a cage inner diameter side flange that extends toward an inner diameter side from both axial ends of the pair of annular portions. The shell-type roller bearing according to any one of claims 1 to 5, wherein the retainer includes a retainer outer-diameter side flange portion that extends outward from both axial ends of the pair of annular portions. A shell-shaped outer ring having both outer ring flange portions formed by bending both end edges in the axial direction toward the inner diameter side, a plurality of rollers rolling on the inner diameter surface of the shell-shaped outer ring, a pair of annular portions, and a plurality of the rollers A plurality of pillars connecting the pair of annular portions so as to form a pocket for housing the roller, and a retainer for holding the rollers, and a method for manufacturing a shell-type roller bearing,
A step of disposing a cage member that has not been heat-treated and formed with the pocket on the inner diameter side of an annular shell-shaped outer ring member that has not been heat-treated;
Forming both outer ring collars on the shell-shaped outer ring member having the cage member disposed on the inner diameter side;
Heat-treating the shell-shaped outer ring member and the cage member;
And a step of incorporating a heat-treated roller from the inner diameter side of the pocket.

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