Corrugated cage with claw

Abstract

To suppress a rise of a manufacturing cost while suppressing the separation of a pair of corrugated holding plates and the damage of a cage even if an inner face of a pocket part is pressed by a ball which causes a delay and an advance.SOLUTION: An inner face 4A of a pocket part 4 of a large first corrugated holding plate 1 is not formed into an undercut shape in an axial direction J. A circumferential-direction opposing inner face 10 which is located while being shifted to a second corrugated holding plate 2 of the first corrugated holding plate 1 is formed into a shape for holding a ball B having a cross section which is vertical in the axial direction J. A distance E between an axial-direction end part L1 apart from the second corrugated holding plate 2 of the circumferential-direction opposing inner face 10 and a revolution raceway surface Q of the ball B in the axial direction J is longer than a clearance GJ1 between the first corrugated holding plate 1 and the ball B in the axial direction J. A distance between an axial-direction end part L2 near the second corrugated holding plate 2 of the circumferential-direction inner face 10 and the revolution raceway surface Q of the ball B is longer than a clearance GJ2 between the second corrugated holding plate 2 and the ball B in the axial direction. A clearance in a circumferential direction is the smallest between the circumferential-direction opposing inner face 10 and the ball B.SELECTED DRAWING: Figure 7

Description

[Technical field]

[0001] The present invention relates to a corrugated cage with claws for use in a ball bearing. [Background technology]

[0002] One type of cage used in ball bearings is a claw-type waveform cage, which is formed by butting a pair of annular waveform retainer plates together in the axial direction to form a pocket portion for retaining the balls, and crimping the locking claws provided on the flat portion of one of the waveform retainer plates so as to overlap the flat portion of the other waveform retainer plate (see, for example, Patent Documents 1 to 3). Claw-type waveform retainers are often used in small-diameter radial ball bearings, miniature ball bearings, and the like (see, for example, Patent Document 1).

[0003] When a ball bearing using a claw-equipped corrugated cage is loaded with a load, the balls that have led or lagged press against the inner surface of the pocket, which can cause the pair of corrugated retainer plates to separate or the retainer to be damaged (see, for example, Patent Documents 2 and 3). To eliminate such problems, in Patent Document 2, an elastic material is inserted between the flat portions of the pair of corrugated retainer plates and the opposing surfaces are fixed with an adhesive or the like, while in Patent Document 3, the locking claw is welded to the flat portion of the other corrugated retainer plate. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Jpn. Jpn. Published No. 37-28112 [Patent Document 2] JP 2008-25783 A [Patent Document 3] JP 2008-32195 A Summary of the Invention [Problem to be solved by the invention]

[0005] The solution to solve the above-mentioned problem in Patent Document 2 increases the number of parts and requires a process of inserting an elastic material and applying an adhesive to the opposing surface, which increases the manufacturing cost. Also, the solution to solve the above-mentioned problem in Patent Document 3 requires a process of welding the locking claw, which increases the manufacturing cost.

[0006] The object of the present invention is to provide a claw-type waveform cage that can prevent separation of a pair of annular waveform retainer plates and damage to the claw-type waveform cage, while also suppressing increases in manufacturing costs, even if balls that lead or lag due to the load of a ball bearing using the claw-type waveform cage press against the inner surface of a pocket portion. [Means for solving the problem]

[0007] The claw-equipped waveform cage according to a first aspect of the present invention is a claw-equipped waveform cage formed by butting a pair of annular waveform retaining plates together in the axial direction and connecting and fixing them with locking claws. The waveform retaining plates are composed of a plurality of pockets for holding balls, which are rolling elements of a ball bearing, and a flat plate portion connecting the pockets adjacent in the circumferential direction. The claw-equipped waveform cage is formed by crimping the locking claws provided on the flat plate portion of one of the waveform retaining plates so as to overlap the flat plate portion of the other waveform retaining plate, with the mating surfaces of the flat plate portions of the pair of waveform retaining plates being in contact with each other. The mating surfaces of the flat plate portions are offset in the axial direction from the orbital plane of the balls. The pair of waveform retaining plates is composed of a large first waveform retaining plate and a small second waveform retaining plate. The inner surface of the pocket portion of the first waveform retaining plate is not undercut in the axial direction. The circumferentially facing inner surface located near the second corrugated retainer plate, which is the inner surface of the pocket portion of the first corrugated retainer plate, has a cross-sectional shape perpendicular to the axial direction that radially embraces the ball. The axial distance between the axial end of the circumferentially facing inner surface far from the second corrugated retainer plate and the revolution orbit surface of the ball is larger than the axial gap between the first corrugated retainer plate and the ball. The axial distance between the axial end of the circumferentially facing inner surface close to the second corrugated retainer plate and the revolution orbit surface of the ball is larger than the axial gap between the second corrugated retainer plate and the ball. The circumferential gap is smallest between the circumferentially facing inner surface and the ball.

[0008] According to the claw-equipped waveform cage of the first aspect, the inner surface of the pocket portion of the large first waveform cage plate is not undercut in the axial direction, which is the opening and closing direction of the press die, so that there is no difficulty in pressing the first waveform cage plate. Moreover, the claw-equipped waveform cage of the first aspect satisfies the following conditions.

[0009] (1) The inner surface of the pocket portion of the first corrugated retainer plate, which is a circumferentially opposing inner surface located closer to the second corrugated retainer plate, has a cross-sectional shape perpendicular to the axial direction that radially holds the balls of the ball bearing. (2) The axial distance between the axial end of the circumferentially opposing inner surface far from the second corrugated retainer plate and the revolution orbital surface of the balls is greater than the axial gap between the first corrugated retainer plate and the balls. (3) The axial distance between the axial end of the circumferentially opposing inner surface close to the second corrugated retaining plate and the revolution orbital surface of the balls is greater than the axial gap between the second corrugated retaining plate and the balls. (4) The circumferential gap is smallest between the circumferentially opposing inner surfaces and the balls.

[0010] By satisfying the conditions (1) to (4), the balls of the ball bearing reliably strike the circumferentially opposing inner surface of the first corrugated retainer plate of the claw-type corrugated retainer, and do not strike the inner surface close to the mating surface of the second corrugated retainer plate of the claw-type corrugated retainer. Therefore, even if the balls of the ball bearing are excessively advanced or delayed, no force acts to pull apart the mating surfaces of the flat portions of the pair of corrugated retainer plates. Therefore, bending stress is unlikely to be repeatedly applied to the locking claws and the pair of corrugated retainer plates.

[0011] A claw-equipped waveform cage according to a second aspect of the present invention is a claw-equipped waveform cage formed by butting an annular waveform retainer plate and an annular flat retainer plate in the axial direction and connecting and fixing them with locking claws. The waveform retainer plate includes a plurality of pockets for holding balls, which are rolling elements of a ball bearing, and a flat plate portion connecting the pockets adjacent in the circumferential direction. The claw-equipped waveform cage is formed by crimping the locking claws provided on the flat retainer plate so as to overlap the flat plate portion of the waveform retainer plate, with the mating surface of the flat plate portion of the waveform retainer plate being in contact with the mating surface of the flat retainer plate. The inner surface of the pocket portion of the waveform retainer plate is not undercut in the axial direction. The inner surface of the pocket portion of the waveform retainer plate, which is the circumferentially facing inner surface located near the flat retainer plate, has a cross-sectional shape perpendicular to the axial direction that holds the balls in the radial direction. The axial distance between the axial end portion of the circumferentially facing inner surface far from the flat retainer plate and the revolution track surface of the balls is larger than the axial gap between the waveform retainer plate and the balls. The axial distance between the axial end of the circumferentially facing inner surface close to the flat retainer plate and the revolution orbital surface of the ball is larger than the axial gap between the flat retainer plate and the ball. The circumferential gap is smallest between the circumferentially facing inner surface and the ball.

[0012] According to the claw-equipped waveform cage of the second aspect, since the inner surface of the pocket portion of the waveform cage plate is not an undercut shape in the axial direction, there is no difficulty in press working the waveform cage plate. Moreover, the claw-equipped waveform cage of the second aspect satisfies the following conditions.

[0013] (1) The inner surface of the pocket portion of the corrugated retaining plate, which is the circumferentially opposing inner surface located closer to the flat retaining plate, has a cross-sectional shape perpendicular to the axial direction that radially holds the balls of the ball bearing. (2) The axial distance between the axial end of the circumferentially opposing inner surface far from the flat retaining plate and the orbital surface of the balls is greater than the axial gap between the corrugated retaining plate and the balls. (3) The axial distance between the axial end of the circumferentially opposing inner surface close to the flat retaining plate and the orbital surface of the balls is greater than the axial gap between the flat retaining plate and the balls. (4) The circumferential gap is smallest between the circumferentially opposing inner surfaces and the balls.

[0014] By satisfying the conditions (1) to (4), the balls of the ball bearing are surely brought into contact with the inner circumferential surface of the corrugated retainer plate of the claw-type corrugated cage. Therefore, even if the balls of the ball bearing are excessively advanced or delayed, no force acts to separate the mating surfaces of the corrugated retainer plate and the flat retainer plate. Therefore, bending stress is unlikely to be repeatedly applied to the locking claws of the claw-type corrugated cage, the corrugated retainer plate, and the flat retainer plate.

[0015] A claw-type waveform retainer according to a third aspect of the present invention is the claw-type waveform retainer according to the second aspect, wherein an axial through hole is provided at a circumferential center position of the pocket portion of the waveform retainer plate in the flat retainer plate.

[0016] A claw-type wavy cage according to a fourth aspect of the present invention is a claw-type wavy cage according to any of the first to third aspects, wherein the shape that holds the balls radially is an arc, a shape combining a plurality of straight lines, or a shape combining an arc and a plurality of straight lines. Effect of the Invention

[0017] As described above, according to the claw-type waveform cage of the present invention, there is no difficulty in press-forming the first waveform retention plate in the claw-type waveform cage of the first aspect, and there is no difficulty in press-forming the waveform retention plate in the claw-type waveform cage of the second aspect.

[0018] Furthermore, according to the claw-type waveform cage of the present invention, bending stress is unlikely to act repeatedly on the locking claws and a pair of waveform retaining plates in the claw-type waveform cage of the first aspect, or the locking claws, waveform retaining plate and flat retaining plate in the claw-type waveform cage of the second aspect, so even if the measures in Patent Document 2 or the measures in Patent Document 3 are not taken, separation of the pair of waveform retaining plates, or separation of the waveform retaining plate and the flat retaining plate, will not occur, and there is little risk of damage to the claw-type waveform cage.

[0019] Therefore, according to the claw-type waveform cage of the present invention, even if the balls that lead or lag due to the load of a ball bearing using the claw-type waveform cage press against the inner surface of the pocket portion, the occurrence of separation and damage to the claw-type waveform cage can be suppressed, while also suppressing increases in manufacturing costs. [Brief description of the drawings]

[0020] [Figure 1] 1 is a perspective view showing a claw-type wave cage according to an embodiment of the present invention and balls held by the cage; [Diagram 2] FIG. 2 is a plan view of the claw-type wave cage and balls of FIG. 1. [Diagram 3] FIG. 2 is a front view of the claw-type wave cage and balls of FIG. [Figure 4] 2 is a partial cross-sectional view of the claw-type wave cage and balls in FIG. 1, viewed from the central axis of rotation. [Diagram 5] 2 is an enlarged front view of a main portion showing a pocket of the claw-type waveform cage of FIG. 1. [Figure 6A] 5 is a cross-sectional view taken along the line X1-X1 of FIG. 4. [Figure 6B] 5 is a cross-sectional view taken along the line X2-X2 of FIG. 4. [Figure 6C] 5 is a cross-sectional view taken along the line X3-X3 of FIG. 4. [Figure 7] FIG. 1 is a schematic diagram showing, with some of the data exaggerated, the axial length of the circumferentially opposing inner surfaces of the first corrugated retainer plate, the distance of each part from the orbital surface of the balls, and the axial gap between the first corrugated retainer plate and the balls, and the axial gap between the second corrugated retainer plate and the balls. [Figure 8] 6B is a schematic diagram corresponding to FIG. 6A and showing a first modified example of a cross-sectional shape perpendicular to the axial direction of circumferentially opposing inner surfaces of a first corrugated retention plate. FIG. [Figure 9] 6B is a schematic view corresponding to FIG. 6A and showing a second modified example of a cross-sectional shape perpendicular to the axial direction of the circumferentially opposing inner surfaces of the first corrugated retention plate. FIG. [Figure 10] 6B is a schematic view corresponding to FIG. 6A and showing a third modified example of a cross-sectional shape perpendicular to the axial direction of the circumferentially opposing inner surfaces of the first corrugated retention plate. FIG. [Figure 11]13 is an enlarged front view of a main portion showing a modified example in which the axial length of circumferentially opposing inner surfaces of a first corrugated retention plate is extended. FIG. [Figure 12] 1 is an enlarged front view of a main portion showing an example of a claw-type corrugated retainer in which an annular corrugated retainer plate and an annular flat retainer plate are butted together in the axial direction and connected and fixed together by locking claws. FIG. [Figure 13] 13 is an enlarged front view of a main portion showing an example in which an axial through hole is provided at the circumferential center position of the pocket portion of the flat retaining plate in a claw-type corrugated retainer having a structure similar to that of the example of FIG. 12. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0021] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0022] In this specification, the direction parallel to the direction of the central axis of rotation of the ball bearing (see, for example, symbol O in Figs. 1 and 2) is called the "axial direction" (see, for example, arrow J in Figs. 1 and 3), and the direction perpendicular to the direction of the central axis of rotation is called the "radial direction" (see, for example, arrow R in Figs. 1 and 2). The "circumferential direction" (see, for example, arrow C in Fig. 2) is defined relative to the direction of the central axis of rotation. Also, a view seen from the outside in the radial direction is called a front view.

[0023] <Corrugated retainer with claws> As shown in Figs. 1 to 3, the claw-equipped corrugated retainer A comprises a pair of annular first corrugated retainer plate 1 and second corrugated retainer plate 2 which are butted against each other in the axial direction J and are connected and fixed by locking claws 3.

[0024] The first corrugated retaining plate 1 consists of a plurality of pocket portions 4 equally spaced in the circumferential direction C which form pockets P for retaining balls B, which are the rolling elements of the ball bearing, and a flat plate portion 6 which connects adjacent pocket portions 4 in the circumferential direction C.

[0025] The second corrugated retaining plate 2 consists of a plurality of pocket portions 5 equally spaced in the circumferential direction C which form pockets P for retaining balls B, and a flat plate portion 7 which connects adjacent pocket portions 5 in the circumferential direction C.

[0026] In this embodiment, the multiple pockets 4 and 5 are equally spaced in the circumferential direction C, but the multiple pockets 4 and 5 may be unequal spaced in the circumferential direction C depending on the specifications of the ball bearing.

[0027] 1, 3 and 4, the mating surface 8 of the flat portion 6 of the first corrugated retainer plate 1 and the mating surface 9 of the flat portion 7 of the second corrugated retainer plate 2 are brought into contact with each other, and the locking claws 3 provided on the flat portion 7 of the second corrugated retainer plate 2 are crimped so as to overlap with the flat portion 6 of the first corrugated retainer plate 1, whereby the first corrugated retainer plate 1 and the second corrugated retainer plate 2 are connected and fixed, and a pocket P for holding the balls B is formed. The locking claws 3 may be provided on the flat portion 6 of the first corrugated retainer 1.

[0028] 3 and 4, the mating surfaces 8, 9 of the flat plate portions 6, 7 are shifted in the axial direction J from the revolution orbital plane Q of the ball B toward the inner surface 5A of the pocket portion 5 of the second corrugated retainer plate 2 (see distance I shown in FIG. 7). Therefore, the first corrugated retainer plate 1 is large and the second corrugated retainer plate 2 is small.

[0029] <Circumferentially facing inner surfaces> 4 and 5, a circumferentially facing inner surface 10 is formed on the inner surface 4A of the pocket portion 4 of the first corrugated retaining plate 1, closer to the second corrugated retaining plate 2. As shown in Fig. 6A, the circumferentially facing inner surface 10 has a cross-sectional shape perpendicular to the axial direction J that is a shape S that holds a ball B in the radial direction R. As shown in Fig. 6B, the inner surfaces 4A other than the circumferentially facing inner surface 10 also have a cross-sectional shape perpendicular to the axial direction J that is a shape S that holds a ball B in the radial direction R.

[0030] The length D in the axial direction J of the circumferentially opposing inner surface 10 shown in Figure 7 is the sum of the distance E in the axial direction J between the axial end L1 of the circumferentially opposing inner surface 10 far from the second corrugated retaining plate 2 and the plane Q of the revolution orbit of the ball, and the distance F in the axial direction J between the axial end L2 of the circumferentially opposing inner surface 10 close to the second corrugated retaining plate 2 and the plane Q of the revolution orbit of the ball B (D = E + F).

[0031] The distance E is larger than the gap GJ1 in the axial direction J between the first corrugated retainer plate 1 and the ball B (E>GJ1), and the distance F is larger than the gap GJ2 in the axial direction J between the second corrugated retainer plate 2 and the ball B (F>GJ2).

[0032] The smallest gap in the circumferential direction C is a gap GC1 in the circumferential direction C between the circumferentially facing inner surface 10 and the ball B shown in FIG. 6A. For example, the gap GC1 is smaller than a gap GC2 in the circumferential direction C between the inner surface 4A of the first corrugated retainer plate 1 and the ball B shown in FIG. 6B, and a gap GC3 in the circumferential direction C between the inner surface 5A of the second corrugated retainer plate 2 and the ball B shown in FIG. 6C (GC1 <GC2、GC1<GC3)。

[0033] 4 and 7, the inner surface 4A of the pocket portion 4 of the first corrugated retainer plate 1, including the circumferentially opposing inner surfaces 10, is not undercut in the axial direction J. Therefore, in the pair of corrugated retainer plates 1, 2, there is no difficulty in press working not only the smaller second corrugated retainer plate 2 but also the larger first corrugated retainer plate 1.

[0034] <Modification of the shape of the circumferentially facing inner surfaces that hold the balls in the radial direction> The shape S of the circumferentially opposing inner surface 10 that holds the ball B in the radial direction R may be a circular arc U1 shown in FIG. 6A, or a shape that combines multiple straight lines such as the straight lines T1, T2, and T3 shown in FIG. 8, or the straight lines T4 and T5 shown in FIG. 9, or a shape that combines a circular arc and multiple straight lines such as the arc U2 and the straight lines T6 and T7 shown in FIG. 10.

[0035] <Modifications of the shape of the first corrugated retaining plate> 4 and 5 can be extended in the axial direction J away from the second corrugated retainer plate 2. Fig. 11 shows an example in which the length of the axial direction J of the circumferentially facing inner surfaces 10 is extended. In the example of Fig. 11, the cross-sectional shape of the first corrugated retainer plate 1 cut by a cylindrical plane including a circle connecting approximately the center of the locking claws 3 in the radial direction R has a rectangular wave shape with rounded corners.

[0036] <Example of a claw-type corrugated cage made up of an annular corrugated retaining plate and an annular flat retaining plate> The corrugated retainer A with claws shown in FIG. 12 is constructed by butting an annular corrugated retainer plate 1A against an annular flat retainer plate 1B in the axial direction J and connecting and fixing them together with locking claws 3.

[0037] The corrugated retaining plate 1A is made up of a number of pocket portions 4, for example, equally spaced in the circumferential direction C, which form pockets P for retaining balls B, which are the rolling elements of the ball bearing, and a flat plate portion 6 which connects adjacent pocket portions 4 in the circumferential direction C. The flat retaining plate 2A is flat and does not have any pocket portions. The flat retaining plate 2A only needs to be molded into a flat plate shape, including the locking claws 3 extending outward in the radial direction R, and since it is easy to mold, the manufacturing costs can be reduced.

[0038] The claw-equipped waveform retainer A is formed by crimping the engagement claws 3 on the flat retaining plate 2A so that they overlap the flat portion 6 of the waveform retaining plate 1A while the mating surface 8 of the flat portion 6 of the waveform retaining plate 1A is in contact with the mating surface 9A of the flat retaining plate 2A.

[0039] The corrugated retainer plate 1A has circumferentially opposing inner surfaces 10 similar to the first corrugated retainer plate 1 in Fig. 11. The inner surfaces 4A of the pocket portions 4 of the corrugated retainer plate 1A are not undercut in the axial direction J, so that there is no difficulty in press working the corrugated retainer plate 1A.

[0040] 12, the claw-type waveform cage A shown in Fig. 13 is configured by butting an annular waveform cage plate 1A and an annular flat cage plate 1B together in the axial direction J and connecting and fixing them with locking claws 3, but a through hole H in the axial direction J is provided in the flat cage 2A at the center of the circumferential direction C of the pocket portion 4 of the waveform cage 1A. By providing the through hole H, the vicinity of the apex on one side of the axial direction J of the balls B can be accommodated within the through hole H, thereby reducing the overall height of the claw-type waveform cage A and making it possible to reduce the dimension in the axial direction J of a ball bearing using this claw-type waveform cage A.

[0041] Even in the claw-equipped corrugated retainer A in which an annular corrugated retainer plate 1A and an annular flat retainer plate 1B are butted together in the axial direction J and connected and fixed by locking claws 3 as shown in Figures 12 and 13, the mating surface 8 of the flat portion 6 of the corrugated retainer plate 1A and the mating surface 9A of the flat retainer plate 1B are shifted in the axial direction J from the orbital plane Q of the ball B (see Figure 7) toward the flat retainer plate 1B.

[0042] <Conditions that the waveform holder must meet> The waveform holder A according to the embodiment of the present invention shown in FIGS. 1 to 11 satisfies the following conditions.

[0043] (1) The inner surface 4A of the pocket portion 4 of the first corrugated retainer plate 1, which is the circumferentially opposing inner surface 10 located closer to the second corrugated retainer plate 2, has a cross-sectional shape perpendicular to the axial direction J of a shape S that holds the balls B of the ball bearing in the radial direction R. (2) The distance E in the axial direction J between the axial end L1 of the circumferentially opposing inner surface 10 farthest from the second corrugated retaining plate 2 and the orbital plane Q of the ball B is greater than the gap GJ1 in the axial direction J between the first corrugated retaining plate 1 and the ball B (E>GJ1). (3) The distance F in the axial direction J between the axial end L2 of the circumferentially opposing inner surface 10 near the second corrugated retaining plate 2 and the orbital plane Q of the ball B is greater than the gap GJ2 in the axial direction J between the second corrugated retaining plate 2 and the ball B (F>GJ2). (4) The gap in the circumferential direction C is smallest between the circumferentially opposing inner surface 10 and the ball B.

[0044] By satisfying the conditions (1) to (4), the balls B of the ball bearing reliably come into contact with the circumferentially opposing inner surface 10 of the first waveform retainer plate 1 of the claw-equipped waveform retainer A, and do not come into contact with the inner surface 5A close to the mating surface 9 of the second waveform retainer plate 2 of the claw-equipped waveform retainer A. Therefore, even if there is an excessive advance or lag of the balls B of the ball bearing, no force acts to pull apart the mating surfaces 8, 9 of the flat portions 6, 7 of the pair of waveform retainer plates 1, 2. Therefore, bending stress is unlikely to act repeatedly on the locking claws 3 and the waveform retainer plates 1, 2.

[0045] The waveform holder A according to the embodiment of the present invention shown in FIGS. 12 and 13 satisfies the following conditions in addition to the above conditions.

[0046] (1) The inner surface 4A of the pocket portion 4 of the corrugated retainer plate 1A, which is the circumferentially opposing inner surface 10 located closer to the flat retainer plate 2A, has a cross-sectional shape perpendicular to the axial direction J of a shape S that holds the balls B of the ball bearing in the radial direction R. (2) The distance E in the axial direction J between the axial end L1 of the circumferentially opposing inner surface 10 farthest from the flat retaining plate 2A and the orbital plane Q of the ball B is greater than the gap GJ1 in the axial direction J between the corrugated retaining plate 1A and the ball B (E>GJ1). (3) The distance F in the axial direction J between the axial end L2 of the circumferentially opposing inner surface 10 near the flat retaining plate 2A and the orbital plane Q of the ball B is greater than the gap GI2 in the axial direction J between the flat retaining plate 2A and the ball B (F>GJ2). (4) The gap in the circumferential direction C is smallest between the circumferentially opposing inner surface 10 and the ball B.

[0047] By satisfying the conditions (1) to (4), the balls B of the ball bearing reliably come into contact with the circumferentially opposing inner surface 10 of the corrugated retainer plate 1A of the claw-equipped corrugated cage A. Therefore, even if there is an excessive advance or lag of the balls B of the ball bearing, no force acts to pull apart the mating surfaces 8, 9A of the corrugated retainer plate 1A and the flat retainer plate 2A. Therefore, bending stress is unlikely to repeatedly act on the locking claws 3, the corrugated retainer plate 1A, and the flat retainer plate 2A.

[0048] <Action and effect> As described above, according to the claw-type waveform holder A according to the embodiment of the present invention, there is no difficulty in press working the first waveform holder plate 1 and the waveform holder plate 1A.

[0049] Furthermore, according to the claw-equipped waveform holder A of the embodiment of the present invention, repeated bending stress is unlikely to act on the locking claw 3 and the pair of waveform holder plates 1, 2, or the locking claw 3 and the waveform holder plate 1A and the flat holder plate 2A, so even if the measures in Patent Document 2 or the measures in Patent Document 3 are not taken, separation of the pair of waveform holder plates 1, 2, or separation of the waveform holder plate 1A and the flat holder plate 2A will not occur, and there is little risk of damage to the claw-equipped waveform holder A.

[0050] Therefore, according to the claw-type waveform cage A of the embodiment of the present invention, even if ball B, which has led or lagged due to the load applied to a ball bearing using the claw-type waveform cage A, presses against the inner surface 4A of the pocket portion 4, it is possible to prevent the separation from occurring and damage to the claw-type waveform cage A, while also preventing an increase in manufacturing costs.

[0051] The above description of the embodiments is given by way of example only and is not intended to be limiting, and various improvements and modifications can be made without departing from the scope of the present invention. [Explanation of symbols]

[0052] 1 1st corrugated retainer plate 1A corrugated retainer plate 2 Second corrugated retainer plate 2A Flat holding plate 3 Locking claw 4,5 Pocket section 4A,5A inner surface 6,7 Flat plate part 8,9,9A Mating surface 10 Circumferentially facing inner surface A Corrugated retainer with claws B ball C circumferential direction D Axial length of circumferentially opposing inner surfaces E is the axial distance between the first end of the circumferentially facing inner surface and the orbital surface of the balls F: The axial distance between the second end of the circumferentially facing inner surface and the orbital surface of the ball GJ1, GJ2 Axial clearance GC1,GC2,GC3 Circumferential clearance H through hole I The axial distance between the mating surface of the flat plate and the orbital surface of the ball J-axis direction L1: Axial end of circumferentially facing inner surface far from the second corrugated retaining plate (flat retaining plate) L2: Axial end of circumferentially facing inner surface close to the second corrugated retaining plate (flat retaining plate) O Rotational axis P Pocket Q The orbital plane of the ball R Radial direction S: Shape that holds the balls radially T1~T7 straight line U1,U2 arc

Claims

1. A claw-equipped corrugated cage is formed by butting a pair of annular corrugated retaining plates in the axial direction and connecting and fixing them with a locking claw, The corrugated retaining plate includes a plurality of pocket portions that retain balls, which are rolling elements of the ball bearing, and a flat plate portion that connects adjacent pocket portions in the circumferential direction, The claw-equipped waveform retainer is formed by crimping the locking claws provided on the flat portion of one of the waveform retaining plates so as to overlap the flat portion of the other waveform retaining plate while the mating surfaces of the flat portions of the pair of waveform retaining plates are in contact with each other, the mating surface of the flat plate portion is offset in the axial direction from the orbital plane of the balls, The pair of corrugated retaining plates includes a first large corrugated retaining plate and a second small corrugated retaining plate, The inner surface of the pocket portion of the first corrugated retaining plate is not an undercut shape in the axial direction, The inner surface of the pocket portion of the first corrugated retaining plate, which is a circumferentially facing inner surface located near the second corrugated retaining plate, has a cross-sectional shape perpendicular to the axial direction that holds the ball in the radial direction, a distance in an axial direction between an axial end portion of the circumferentially opposing inner surface far from the second corrugated retaining plate and a revolution orbital surface of the ball is larger than an axial gap between the first corrugated retaining plate and the ball, a distance in an axial direction between an end portion of the circumferentially facing inner surface close to the second corrugated retaining plate and a revolution orbital surface of the ball is larger than an axial gap between the second corrugated retaining plate and the ball, The circumferential gap is smallest between the circumferentially opposing inner surface and the ball. Corrugated retainer with claws.

2. A corrugated retainer with claws is formed by butting an annular corrugated retainer plate and an annular flat retainer plate in the axial direction and connecting and fixing them with a locking claw, The corrugated retaining plate includes a plurality of pocket portions that retain balls, which are rolling elements of the ball bearing, and a flat plate portion that connects adjacent pocket portions in the circumferential direction, The claw-equipped waveform retainer is configured by crimping the locking claws provided on the flat retaining plate so as to overlap the flat portion of the waveform retaining plate with the mating surface of the flat portion of the waveform retaining plate in contact with the mating surface of the flat retaining plate, The inner surface of the pocket portion of the corrugated retaining plate is not an axial undercut shape, The inner surface of the pocket portion of the corrugated retaining plate, which is a circumferentially facing inner surface located near the flat retaining plate, has a cross-sectional shape perpendicular to the axial direction that holds the ball in the radial direction, a distance in an axial direction between an axial end portion of the circumferentially opposing inner surface far from the flat retaining plate and an orbital surface of the ball is larger than an axial gap between the corrugated retaining plate and the ball; a distance in an axial direction between an axial end portion of the circumferentially opposing inner surface close to the flat retaining plate and an orbital surface of the ball is larger than an axial gap between the flat retaining plate and the ball; The circumferential gap is smallest between the circumferentially opposing inner surface and the ball. Corrugated retainer with claws.

3. The flat retaining plate has an axial through hole at a circumferential center position of the pocket portion of the corrugated retaining plate.

3. The claw-equipped wave cage according to claim 2.

4. The shape of the ball that holds the ball in the radial direction is as follows: Arc-shaped, A shape that combines multiple straight lines, or A shape that combines a circular arc and multiple straight lines. The claw-equipped wave cage according to any one of claims 1 to 3.

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