Resin retainer, roller with resin retainer, and planetary gear support structure

Abstract

To provide a resin-made cage, a roller with the resin-made cage and planetary gear support structure, enabling improvement of the durability of bar portions.SOLUTION: A bar portions (31) of a resin-made cage (3) has: a roller guiding surface (40) for guiding rollers; an outside-diameter side recess portion (32) recessed in a peripheral direction rather than the roller guiding surface, and extending up to a middle position in a radial direction toward an inside diameter from an outside diameter; and an inside-diameter side recess portion (35) recessed in the peripheral direction rather than the roller guiding surface, and extending up to an inside-diameter side while continuing thereto from the outside-diameter side recess portion. When W1 denotes a distance between the outside-diameter side recess portions of the bar portions which oppose each other with a pocket portion (50) defined between the adjacent bar portion in the peripheral direction sandwiched therebetween, and W2 denotes a distance between the inside-diameter side recess portions of the bar portion which oppose each other with the pock part sandwiched therebetween, relationship of W1>W2 is established.SELECTED DRAWING: Figure 5

Description

Technical Field

[0001] The present invention relates to a resin cage, a roller with a resin cage, and a planetary gear support structure.

Background Art

[0002] As a structure for ensuring the lubricity of the roller guide surface of the cage, Patent Document 1 (Japanese Patent Application Laid-Open No. 7-103320) is known.

[0003] In the needle roller with a resin cage described in Patent Document 1, a notch is provided on the side facing the pocket portion of the column portion. By this notch, the amount of lubricating oil supplied to the cage can be increased, and the life of the bearing is improved.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] In the cage of Patent Document 1, since a notch is formed in the column portion, the strength of the column portion may be reduced.

[0006] The present invention has been made to solve the above problems, and an object thereof is to provide a resin cage, a roller with a resin cage, and a planetary gear support structure capable of improving the durability of the column portion.

Means for Solving the Problems

[0007] The resin cage according to one aspect of the present invention includes a pair of annular portions and a plurality of column portions that extend axially to connect the pair of annular portions. The column portions include a roller guiding surface for guiding a roller, an outer diameter side recess that is recessed in the circumferential direction from the roller guiding surface and extends to a position in the middle of the radial direction from the outer diameter to the inner diameter, and an inner diameter side recess that is recessed in the circumferential direction from the roller guiding surface and continuously extends from the outer diameter side recess to the inner diameter side. When the distance between the outer diameter side recesses of the column portions facing each other across the pocket portion partitioned between the column portions adjacent in the circumferential direction is W1, and the distance between the inner diameter side recesses of the column portions facing each other across the pocket portion is W2, the relationship W1>W2 holds.

[0008] Preferably, in a cross-section perpendicular to the axis of the resin cage, the outer diameter side recess extends parallel to the radial center line of the pocket portion extending in the radial direction, and the inner diameter side recess extends parallel to the radial center line of the column portion extending in the radial direction.

[0009] Preferably, in a cross-section perpendicular to the axis of the resin cage, the outer diameter side recess extends parallel to the radial center line of the pocket portion extending in the radial direction, and the inner diameter side recess is inclined toward the pocket portion side as it goes toward the inner diameter side.

[0010] Preferably, it further includes an outer diameter side roller stopper that protrudes toward the pocket portion side and restricts the radial outward movement of the roller, and an inner diameter side roller stopper that protrudes toward the pocket portion side and restricts the radial inward movement of the roller. The boundary portion between the outer diameter side recess and the inner diameter side recess overlaps with the radial position of the inner diameter side roller stopper.

[0011] The needle roller with a resin cage according to one aspect of the present invention includes the above-described resin cage and needle rollers held in the pocket portions.

[0012] The needle roller with a resin cage according to one aspect of the present invention is provided at the center of the planetary gear of the planetary gear support structure. The planetary gear support structure according to one aspect of the present invention includes an internal gear, a sun gear disposed at the center of the internal gear, a plurality of planetary gears meshing with the internal gear and the sun gear, and a carrier for supporting the planetary gears. In the planetary gear support structure of a planetary gear mechanism in which the planetary gears are rotatably supported via rolling bearings on pinion shafts provided on the carrier, the rolling bearings are the above-described rollers with resin cages.

Effect of the Invention

[0013] According to the present invention, it is possible to provide a resin cage capable of improving the durability of the column portion, a roller with a resin cage, and a planetary gear support structure.

Brief Description of the Drawings

[0014]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Embodiment for Carrying out the Invention

[0015] Embodiments of the present invention will be described in detail with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals and their description will not be repeated.

[0016] (Outline of Planetary Gear Support Structure) First, with reference to Figs. 1(A) and 1(B), an outline of a planetary gear mechanism 1 in which a roller 2 with a cage made of resin according to the present embodiment is used will be described.

[0017] The planetary gear mechanism 1 is used, for example, in an automobile transmission, etc. In order to rotatably support a pinion gear (planetary gear) 13 in the planetary gear mechanism 1, a roller 2 with a cage is used. That is, the roller 2 with a cage according to the present embodiment is a roller with a cage for an automobile.

[0018] The planetary gear mechanism 1 includes a ring gear (internal gear) 11 having internal teeth and surrounding the outer periphery, a sun gear (sun gear) 12 having external teeth and disposed at the center of the ring gear 11, and a plurality of pinion gears (planetary gears) 13 having external teeth and disposed between the ring gear 11 and the sun gear 12. The pinion gear 13 meshes with the ring gear 11 and the sun gear 12, and is rotatably supported by a roller 2 with a cage on a pinion shaft 15 installed in an engagement hole. Each pinion shaft 15 is provided (connected) on a carrier 14, and rotation corresponding to the revolution of the pinion gear 13 is input and output from the carrier 14.

[0019] Referring to FIG. 1(B), each pinion gear 13 is rotatably supported on a pinion shaft 15 via a roller 2 with a cage according to the present embodiment. That is, the roller 2 with a cage rotatably supports the pinion gear 13 and the pinion shaft 15, and the planetary gear mechanism 1 includes the pinion gear 13, the pinion shaft 15, and the roller 2 with a cage. Specifically, the roller 2 with a cage is composed of, for example, a plurality of rollers 20 and a cage 3, with the outer peripheral surface of the pinion shaft 15 serving as the inner raceway surface and the inner peripheral surface of the pinion gear 13 serving as the outer raceway surface. The cage 3 of the present embodiment is used in outer ring guidance. The roller 20 of the present embodiment is a needle roller.

[0020] An oil passage hole 16 for supplying lubricating oil is formed inside the pinion shaft 15. In this way, the lubricating oil is guided to the outer peripheral surface of the pinion shaft 15 through the oil passage hole 16 formed inside the pinion shaft 15 to lubricate the roller 20. Specifically, the oil passage hole 16 includes a first oil passage hole 16a extending axially from the right side on the paper surface of FIG. 1 and a second oil passage hole 16b communicating with the outer peripheral surface near the axial center of the pinion shaft 15. The lubricating oil supplied from the oil passage holes 16a and 16b of the pinion shaft 15 passes through the gap between the column portion 31 and the roller 20 to lubricate the outer peripheral surface of the roller 20.

[0021] When the planetary gear mechanism 1 is used in a transmission of a vehicle with multiple gears, the amount of lubricating oil supplied to the roller 2 with a cage may be reduced or a low-viscosity lubricating oil may be supplied in order to further improve the fuel efficiency of the vehicle. The kinematic viscosity of the lubricating oil used for such improvement of the vehicle's fuel efficiency is, for example, 2 centistokes (cSt) to 8 centistokes (cSt) at 100°C.

[0022] (Embodiment 1) Next, referring to FIGS. 2 to 5, the cage 3 in the present embodiment will be described.

[0023] The cage 3 has a pair of annular portions 30 and a plurality of column portions 31 that extend axially and connect the pair of annular portions 30 to each other. Between adjacent column portions 31, there are provided pocket portions 50 for accommodating the rollers 20 (Fig. 1(B)). The pocket portions 50 are partitioned between column portions 31 adjacent in the circumferential direction, and a plurality of them are provided at intervals in the circumferential direction. The column portions 31 are, for example, straight-type cages, and the upper part of the central portion in the axial direction thereof is recessed toward the inner diameter side. In the following description, in the roller 2 with a cage, the direction along the axis (central axis) is referred to as the "axial direction", the direction orthogonal to the axis is referred to as the "radial direction", and the circumferential direction along the arc centered on the axis is referred to as the "circumferential direction".

[0024] The cage 3 is made of resin. Thereby, protrusions and recesses can be easily manufactured by injection molding. As the cage material, any material may be used as long as it has sufficient mechanical strength. In order to improve the mechanical strength, reinforcing fibers may be mixed. Examples of the cage material include resins such as polyetheretherketone (PEEK), polyphenylene sulfide (PPS), polyamide 6 (PA6) resin, polyamide 4-6 (PA46) resin, polyamide 6-6 (PA66), and polyamide 9T (PA9T). The resin cage 3 has a small specific gravity and can be made lightweight. Even when it contacts the roller 20 with a small contact area, the contact surface pressure does not become excessive, and wear is less likely to occur.

[0025] The column portions 31 extend substantially parallel to the axial direction along the axis, and a plurality of them are arranged at intervals in the circumferential direction. Each column portion 31 is integrally connected to one annular portion 30 at one end and integrally connected to the other annular portion 30 at the other end.

[0026] Referring to Figs. 3 and 4, the column portion 31 includes a roller guide surface 40 for guiding the roller 20, first and second outer diameter side recesses 32 and 33, first to third inner diameter side recesses 34, 35, and 36, an outer diameter side roller stopper portion 41, and an inner diameter side roller stopper portion 42 on the wall surface facing the pocket portion 50 (the surface facing the column portion 31).

[0027] The roller guide surface 40 is a surface that contacts the rolling surface of the roller 20 and guides the roller 20 to be rollable. As shown in FIGS. 3 and 4, a pair of roller guide surfaces 40 are provided with the first outer diameter side recessed portion 32 interposed therebetween in the axial direction. As shown in FIG. 5, the roller guide surface 40 is a pocket wall surface that intersects the pitch circle PCD of the roller 20. The roller guide surfaces 40 facing each other through the pocket portion 50 are substantially parallel to the pocket center line L1 of the pocket portion 50.

[0028] On the outer diameter side of the roller guide surface 40, outer diameter side roller stoppers 41 are respectively provided. The outer diameter side roller stoppers 41 protrude toward the pocket portion 50 side rather than the roller guide surface 40. As shown in FIG. 5, the outer diameter side roller stoppers 41 are provided on both circumferential sides of the pocket portion 50 to form a pair. The interval between the outer diameter side roller stoppers 41 facing each other across the pocket portion 50 is smaller than the diameter of the roller 20. Thereby, the outer diameter side roller stoppers 41 regulate the movement of the roller 20 in the radial outer direction. The outer diameter side roller stoppers 41 are so-called outer claws.

[0029] On the inner diameter side of the roller guide surface 40, a pair of inner diameter side roller stoppers 42 are provided. The inner diameter side roller stoppers 42 protrude toward the pocket portion 50 side rather than the roller guide surface 40. As shown in FIGS. 3 and 4, the inner diameter side roller stoppers 42 are provided between the above-described roller guide surface 40 and the outer diameter side roller stoppers 41. As shown in FIG. 5, the inner diameter side roller stoppers 42 are provided on both circumferential sides of the pocket portion 50 to form a pair. The interval between the inner diameter side roller stoppers 42 facing each other across the pocket portion 50 is smaller than the diameter of the roller 20. Thereby, the inner diameter side roller stoppers 42 regulate the movement of the roller 20 in the radial inner direction. The inner diameter side roller stoppers 42 are so-called inner claws.

[0030] The first and second outer diameter side recessed portions 32 and 33 are recessed in the circumferential direction from the roller guide surface 40 and extend to a position in the middle in the radial direction from the outer diameter to the inner diameter. As shown in FIG. 4(B), it is preferable that the recessed dimensions in the circumferential direction of the first and second outer diameter side recessed portions 32 and 33 are substantially the same, and the dimensions in the radial direction are also substantially the same. The first outer diameter side recessed portion 32 is located at the axial center of the column portion 31. Specifically, the first outer diameter side recessed portion 32 is sandwiched in the axial direction by a pair of roller guide surfaces 40. A pair of second outer diameter side recessed portions 33 are provided and are respectively provided between the roller guide surface 40 and the inner wall of the annular portion 30 adjacent thereto in the axial direction. The first and second outer diameter side recessed portions 32 and 33 are flat planes.

[0031] The first to third inner diameter side recessed portions 34, 35, and 36 are recessed in the circumferential direction from the roller guide surface 40 and extend continuously to the inner diameter side from the first and second outer diameter side recessed portions 32 and 33. As shown in FIG. 4(B), it is preferable that the recessed dimensions in the circumferential direction of the first to third inner diameter side recessed portions 34, 35, and 36 are substantially the same, and the dimensions in the radial direction are also substantially the same. The first inner diameter side recessed portion 34 is located at the axial center of the column portion 31. Specifically, the first inner diameter side recessed portion 34 is sandwiched in the axial direction by a pair of inner diameter side roller stoppers 42. A pair of second inner diameter side recessed portions 35 are provided and are respectively provided between the inner diameter side roller stoppers 42 and the roller guide surface 40 in the axial direction. A pair of third inner diameter side recessed portions 36 are provided and are respectively provided between the roller guide surface 40 and the inner wall of the annular portion 30 adjacent thereto. The first to third inner diameter side recessed portions 34, 35, and 36 are flat planes.

[0032] As shown in FIG. 3, the first outer diameter side recessed portion 32 is continuous with the first inner diameter side recessed portion 34 at the axial center portion of the column portion 31. Similarly, the first outer diameter side recessed portion 32 is continuous with the second inner diameter side recessed portion 35 between the roller guide surface 40 and the inner diameter side roller stopper 42, and the second outer diameter side recessed portion 33 is continuous with the third inner diameter side recessed portion 36 at both axial ends. It is preferable that these boundary portions extend in a straight line in the axial direction while being divided at the inner diameter side roller stopper 42 and the roller guide surface 40.

[0033] As shown in Fig. 5, these boundary portions may be provided with an angle (edge) or may be arc-shaped in a cross-sectional shape perpendicular to the axis. Further, these boundary portions overlap the radial position of the inner diameter side roller stopper portion 42. These boundary portions are preferably located on the inner diameter side of the pitch circle PCD.

[0034] As described above, since the second oil passage hole 16b for supplying lubricating oil to the inner diameter side of the cage 3 is provided inside the pinion shaft 15 (Fig. 1(B)), when the first inner diameter side recessed portion 34 is located near the axial center portion, the lubricating oil from the second oil passage hole 16b can be efficiently supplied to the outer diameter side. Thereby, the first and second outer diameter side recessed portions 32 and 33 and the first to third inner diameter side recessed portions 34, 35, and 36 serve as oil guiding surfaces for guiding lubricating oil from the inner diameter side to the outer diameter side or from the outer diameter side to the inner diameter side. Further, the first and second outer diameter side recessed portions 32 and 33 and the first to third inner diameter side recessed portions 34, 35, and 36 also function as oil draining portions for draining lubricating oil.

[0035] Referring to Fig. 5, the first outer diameter side recessed portion 32 extends parallel along the radial center line L2 of the pocket portion 50 extending in the radial direction in a cross-section perpendicular to the axis of the cage 3. The second inner diameter side recessed portion 35 extends parallel along the radial center line L2 of the column portion 31 extending in the radial direction in its cross-section. The same applies to the relationship between the first outer diameter side recessed portion 32 and the first inner diameter side recessed portion 34, and the relationship between the second outer diameter side recessed portion 33 and the third inner diameter side recessed portion 36.

[0036] Referring to the figure, when the distance between the first outer diameter side recessed portions 32 of the column portions 31 facing each other across the pocket portion 50 partitioned between the column portions 31 adjacent to each other in the circumferential direction is W1, and the distance between the first inner diameter side recessed portions 35 of the column portions 31 facing each other across the pocket portion 50 is W2, the relationship of W1>W2 holds. Here, W1 is the distance of the outer diameter side edge of the first outer diameter side recessed portion 32, and W2 is the distance of the inner diameter side edge of the second inner diameter side recessed portion 35. Also, focusing on one column portion 31, let the thickness of the first outer diameter side recessed portion 32 be D1 and the thickness of the first outer diameter side recessed portion 32 be D2. Here, D1 is the thickness at the outer diameter side edge, and D2 is the thickness at the inner diameter side edge. In the present embodiment, the thicknesses of D1 and D2 are made different, and the relationship of D1>D2 holds.

[0037] For the explanation of the effect of the cage 3 according to the present embodiment, the configuration of the conventional resin cage 103 will be described. Regarding the configuration similar to that of the first embodiment, the same reference numerals as those in the first embodiment are given, and the description is omitted.

[0038] (Regarding the conventional cage) Referring to FIGS. 7 to 9, the conventional cage 103 is different from the first embodiment in the configuration of the wall portion constituting the pocket portion 50 of the column portion 131. In the column portion 131, a central recessed portion 132 is provided at the central portion in the axial direction. The central recessed portion 132 is located between the pair of roller guide surfaces 40 and the outer diameter side roller stopper portion 41. An axially outer recessed portion 133 is provided between the pair of roller guide surfaces 40 and the outer diameter side roller stopper portion 41 and the annular portion 30. As shown in FIG. 8(B), these recessed portions 132 and 133 are recessed in the circumferential direction by the same dimension in the column portion 131. As shown in FIG. 9, these recessed portions 132 and 133 are inclined at the same angle so as to face the central axis L2 of the column portion 131 from the radially outer side toward the inner side.

[0039] Referring to Fig. 9, when the distance between the first outer diameter side recessed portions 132 of the column portions 131 facing each other across the pocket portion 50 partitioned between the adjacent column portions 131 in the circumferential direction is W1, and the distance between the inner diameter side recessed portions 132 of the column portions 131 facing each other across the pocket portion 50 is W4, the relationship of W1 = W4 holds. Here, W1 is the distance of the outer diameter side edge of the first outer diameter side recessed portion 132, and W4 is the distance of the inner diameter side edge of the inner diameter side recessed portion 132. Further, focusing on a single column portion 131, the thickness of the central recessed portion 132 at the outer diameter side edge is D1, and the thickness of the central recessed portion 132 at the inner diameter side edge is D4. In the conventional cage 103, the relationship of D1 > D4 holds.

[0040] (Effect of Embodiment 1) As described above, in the conventional cage 103, W1 = W4, and the circumferential thickness D1 of the central recessed portion 132 of a single column portion 131 is greater than D4. As a result, the circumferential thickness of the central recessed portion 132 of the column portion 131 decreases from the outer diameter side to the inner diameter side, and there is a problem particularly in the durability of the inner diameter side of the column portion 131.

[0041] On the other hand, in the present embodiment, since W1 > W2, the circumferential thickness D2 (Fig. 5) of the central recessed portion 132 can be made larger than the circumferential thickness D4 (Fig. 9) of the first inner diameter side recessed portion 35 of the conventional resin cage 103 (D2 > D4). Thereby, compared with the conventional cage 103, it becomes possible to improve the durability of the column portion 131.

[0042] Furthermore, by providing the recessed portions 32, 33, 34, 35, 36, lubricating oil can be efficiently supplied to the anti-rotation portions 41, 42 where the lubrication environment is severe. By suppressing the wear between the anti-rotation portions 41, 42 and the rollers, it is possible to suppress the occurrence of peeling on the rollers 20, and the long life of the roller 2 with a cage can be achieved.

[0043] In addition, according to the present embodiment, since the recessed portions 32, 33, 34, 35, and 36 are provided, it becomes easier to supply lubricating oil, and the long life of the roller 2 with a cage can be achieved. The effect is significant when applied to a planetary gear support structure in a transmission of an automobile where the lubrication environment of the bearing becomes severe due to fuel efficiency improvement.

[0044] (Embodiment 2) With reference to FIG. 6, the cage 3A according to Embodiment 2 will be described. The cage 3A according to Embodiment 2 has basically the same configuration as the cage 3 of Embodiment 1, but mainly differs in the shape of the central portion of the column. Therefore, the same components as those in Embodiment 1 are denoted by the same reference numerals, and their descriptions will not be repeated.

[0045] In a cross section perpendicular to the axis of the cage 3, the first outer diameter side recessed portion 32 extends parallel to the radial center line L2 of the pocket portion 50 extending in the radial direction, and the second inner diameter side recessed portion 35A does not extend parallel to the radial center line L2 of the pocket portion 50 extending in the radial direction, and inclines toward the pocket portion 50 side as it goes toward the inner diameter side.

[0046] With reference to the same figure, also in the present embodiment, when the distance between the first outer diameter side recessed portions 32 of the column portions 31 facing each other across the pocket portion 50 partitioned between the column portions 31 adjacent to each other in the circumferential direction is W1, and the distance between the first inner diameter side recessed portions 35 of the column portions 31 facing each other across the pocket portion 50 is W3, the relationship of W1 > W3 holds. Note that W1 is the distance of the outer diameter side edge of the first outer diameter side recessed portion 32, and W2 is the distance of the inner diameter side edge of the second inner diameter side recessed portion 35. Further, focusing on one column portion 31, the thickness of the first outer diameter side recessed portion 32 is D1, and the thickness of the first inner diameter side recessed portion 35A is D3. The thickness D3 of the first inner diameter side recessed portion 35A in the present embodiment is larger than the thickness D2 of the first inner diameter side recessed portion 35 in Embodiment 1.

[0047] Also in this embodiment, since W1 > W3, the circumferential thickness D3 (Fig. 6) of the first inner-diameter-side recessed portion 35A can be made larger than the circumferential thickness D4 (Fig. 9) of the central recessed portion 132 on the inner diameter side of the conventional resin cage 103. Further, in this embodiment, since the circumferential thickness D3 of the first inner-diameter-side recessed portion 35A can be made larger than the thickness D2 of the first inner-diameter-side recessed portion 35 of the first embodiment, it is possible to improve the durability as compared with the cage 3 of the first embodiment.

[0048] In the above embodiment, the roller 20 accommodated in the pocket portion 50 uses a needle roller, but it is not limited thereto, and for example, a cylindrical roller, a bar-shaped roller, etc. may be used.

[0049] Also, in the above embodiment, the cages 3 and 3A have a pair of annular portions and are straight cages in which the column portion 31 does not bend, but it is not limited thereto, and an M-shaped cage in which the column portion 31 bends, a so-called V-shaped cage having no pair of annular portions 30, etc. may be used.

[0050] Also, in the above embodiment, the pair of outer-diameter-side roller stoppers 41 has a shape sandwiching the pair of inner-diameter-side roller stoppers 42, but it is not limited to their arrangement relationship such as the outer-diameter-side roller stopper 41 and the inner-diameter-side roller stopper 42 being aligned in the radial direction.

[0051] The first and second outer-diameter-side recessed portions 32 and 33 and the first to third inner-diameter-side recessed portions 34, 35, and 36 of Embodiments 1 and 2 are not limited to flat planes, and for example, may be concave curved surfaces, convex curved surfaces, or surfaces combining various other shapes. Also, for convenience of explanation, the first and second outer-diameter-side recessed portions 32 and 33 and the first to third inner-diameter-side recessed portions 34, 35, and 36 have been separately described, but depending on the shapes of the roller stoppers 41 and 42, they may be provided continuously in the axial direction, and at least one outer-diameter-side recessed portion and one inner-diameter-side recessed portion may be provided. In this case, the outer-diameter-side recessed portion and the inner-diameter-side recessed portion only need to have different inclination angles with respect to the center line L2 of the column portions 3 and 3A.

[0052] The embodiments disclosed this time should be considered illustrative in all respects and not restrictive. The scope of the present invention is shown not by the above description but by the claims, and it is intended that all modifications within the meaning and scope equivalent to the claims be included.

Explanation of Signs

[0053] 1 planetary gear mechanism, 2 roller with retainer, 3, 3A retainer, 11 ring gear, 12 sun gear, 13 pinion gear, 14 carrier, 15 pinion shaft, 20 roller, 30 annular portion, 31 column portion, 32 first outer diameter side recessed portion, 33 second outer diameter side recessed portion, 33 second outer diameter side recessed portion, 34 first inner diameter side recessed portion, 34 first inner diameter side recessed portion, 35 second inner diameter side recessed portion, 36 third inner diameter side recessed portion, 40 roller guide surface, 41 outer diameter side roller stopper portion, 42 inner diameter side roller stopper portion, 50 pocket portion, 103 retainer, 103 retainer, 131 column portion, 132 central recessed portion.

Claims

1. It includes a pair of annular parts and a plurality of column parts that extend in the axial direction and connect the pair of annular parts. The column part guides a roller and includes a pair of roller guide surfaces that are provided at intervals in the axial direction, an outer diameter side recessed part that is recessed in the circumferential direction from the roller guide surface and extends to a position in the middle of the radial direction from the outer diameter to the inner diameter, and an inner diameter side recessed part that is recessed in the circumferential direction from the roller guide surface and extends continuously from the outer diameter side recessed part to the inner diameter side. The outer diameter side recessed part includes a first outer diameter side recessed part located between the pair of roller guide surfaces and a pair of second outer diameter side recessed parts provided between the roller guide surface and the annular part. The inner diameter side recessed part includes a first inner diameter side recessed part located between the pair of roller guide surfaces and a pair of second inner diameter side recessed parts provided between the roller guide surface and the annular part. When the distances between the first outer diameter side recessed parts and the second outer diameter side recessed parts of the column parts facing each other across the pocket part partitioned between the column parts adjacent in the circumferential direction are respectively W1, and the distances between the first inner diameter side recessed parts and the second inner diameter side recessed parts of the column parts facing each other across the pocket part are respectively W2, a resin cage in which the relationship W1 > W2 holds in both cases.

2. In a cross-section perpendicular to the axis of the resin cage, the outer diameter side recessed part extends parallel to the radial center line of the pocket part extending in the radial direction, the inner diameter side recessed part extends parallel to the radial center line of the column part extending in the radial direction. The resin cage according to Claim 1.

3. In a cross-section perpendicular to the axis of the resin cage, the outer diameter side recessed part extends parallel to the radial center line of the pocket part extending in the radial direction, the inner diameter side recessed part is inclined toward the pocket part side as it goes toward the inner diameter side. The resin cage according to Claim 1.

4. An outer diameter side roller stopper portion that protrudes toward the pocket portion side and restricts movement of the roller in the radial outer direction thereof, and an inner diameter side roller stopper portion that protrudes toward the pocket portion side and restricts movement of the roller in the radial inner direction thereof are further provided. The resin cage according to claim 2 or 3, wherein a boundary portion between the outer diameter side recessed portion and the inner diameter side recessed portion overlaps a radial position of the inner diameter side roller stopper portion.

5. A resin cage according to any one of claims 1 to 4, and a needled roller held in the pocket portion, a needled roller with a resin cage.

6. An internal gear, a sun gear disposed at the center of the internal gear, a plurality of planetary gears meshing with the internal gear and the sun gear, and a carrier supporting the planetary gears are provided. In a planetary gear support structure of a planetary gear mechanism in which the planetary gear is rotatably supported via a rolling bearing on a pinion shaft provided on the carrier, The rolling bearing is a needled roller with a resin cage according to any one of claims 1 to 5, a planetary gear support structure.

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