WO2022202526A1

WO2022202526A1 - Resin cage, rollers with resin cage, and planetary gear support structure

Info

Publication number: WO2022202526A1
Application number: PCT/JP2022/011875
Authority: WO
Inventors: いず美大橋
Original assignee: Ntn株式会社
Priority date: 2021-03-25
Filing date: 2022-03-16
Publication date: 2022-09-29
Also published as: CN116568939A; JP2022149706A

Abstract

Each of column portions (31) of a resin cage (3) has: roller guide surfaces (40) for guiding rollers; outer-diameter-side recessed portions (32) which are recessed from the roller guide surfaces in the circumferential direction and each of which extends from the outer diameter toward the inner diameter partway to a position in the radial direction; and inner-diameter-side recessed portions (35) which are recessed from the roller guide surfaces in the circumferential direction and which continuously extend from the outer-diameter-side recessed portions to the inner diameter side. Assuming that a distance between the outer-diameter-side recessed portions of the column portions facing each other across a pocket portion (50) defined between the column portions adjacent to each other in the circumferential direction is represented by W1 and a distance between the inner-diameter-side recessed portions of the column portions facing each other across the pocket portion is represented by W2, a relationship of W1>W2 is established.

Description

Resin cage, rollers with resin cage and planetary gear support structure

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

Patent Document 1 (Japanese Unexamined Patent Publication No. 7-103320) is known as a structure for ensuring the lubricity of the roller guide surface of the retainer.

In the resin-made needle roller with retainer described in Patent Document 1, a notch is provided on the side of the column facing the pocket. This notch can increase the amount of lubricating oil supplied to the retainer, thereby extending the life of the bearing.

JP-A-7-103320

In the retainer of Patent Document 1, the notches are formed in the pillars, which may reduce the strength of the pillars.

SUMMARY OF THE INVENTION The present invention has been made to solve the problems described above, and an object of the present invention is to provide a resin cage, a roller with a resin cage, and a planetary ring capable of improving the durability of a column portion. To provide a gear support structure.

A resin retainer according to one aspect of the present invention includes a pair of annular portions and a plurality of pillars extending in an axial direction and connecting the pair of annular portions. an outer diameter side recessed portion that is recessed in the circumferential direction from the roller guide surface and extends from the outer diameter toward the inner diameter to a radially intermediate position; W1 is the distance between the outer diameter side recessed portions of the pillars facing each other across the pocket portion partitioned between the adjacent pillars in the circumferential direction, and the pocket is W1; When the distance between the inner diameter side recessed portions of the pillars facing each other with the column facing each other is W2, the relationship of W1>W2 is established.

Preferably, in a cross section perpendicular to the axis of the resin cage, the outer diameter side recess extends in parallel along the radial centerline of the pocket extending in the radial direction, and the inner diameter side recess is: It extends parallel to the radial centerline of the radially extending post.

Preferably, in a cross section perpendicular to the axis of the resin cage, the outer diameter recess extends parallel to the radial centerline of the pocket extending in the radial direction, and the inner diameter recess extends parallel to the inner diameter side. , and is inclined toward the pocket portion side.

Preferably, an outer diameter side roller stop portion that protrudes toward the pocket portion and regulates the radially outer movement of the roller, and an inner diameter side roller stop portion that protrudes toward the pocket portion and regulates the radially inner movement of the roller. Further, the boundary portion between the outer diameter side recessed portion and the inner diameter side recessed portion overlaps the radial position of the inner diameter side roller stop portion.

A needle roller with a resin retainer according to one aspect of the present invention includes the resin retainer described above and needle rollers held in pocket portions.

A needle roller with a resin retainer according to one aspect of the present invention is provided at the center of the planetary gear of the planetary gear support structure. A planetary gear support structure according to an aspect of the present invention supports an internal gear, a sun gear arranged at the center of the internal gear, a plurality of planetary gears meshing with the internal gear and the sun gear, and the planetary gear. A planetary gear support structure for a planetary gear mechanism in which planetary gears are rotatably supported by a pinion shaft provided on the carrier through rolling bearings, wherein the rolling bearings are the rollers with resin retainers described above. is.

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

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows the state which used the resin roller with cage which concerns on Embodiment 1 of this invention for the planetary-gear support structure, (A) is a schematic diagram of a planetary-gear support structure, (B) is a planetary-gear support structure. It is a sectional view of a gear support shaft. 1 is a perspective view showing a resin retainer according to Embodiment 1 of the present invention; FIG. FIG. 2 is a perspective view showing an enlarged part of the resin retainer shown in FIG. 1; 4A is a cross-sectional view in the radial direction, and FIG. 4B is a plan view showing the column portion of the resin retainer shown in FIG. 3. FIG. FIG. 5 is a cross-sectional view seen from an arrow V in FIG. 4(A); FIG. 6 is a view showing a resin retainer according to Embodiment 2 of the present invention, and is a cross-sectional view corresponding to FIG. 5; It is a perspective view showing a portion of a conventional resin cage. 8A and 8B are diagrams showing the pocket portion of the resin retainer shown in FIG. 7, where (A) is a radial cross-sectional view and (B) is a plan view; FIG. 8B is a cross-sectional view as seen from arrow IX in FIG. 8A;

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

(Overview of planetary gear support structure)
First, an outline of a planetary gear mechanism (planetary gear) 1 using a resin-made roller and retainer assembly 2 according to the present embodiment will be described with reference to FIGS. 1(A) and 1(B).

The planetary gear mechanism 1 is used, for example, in a transmission of an automobile, and the rollers with cage 2 are used to rotatably support the pinion gear (planetary gear) 13 in the planetary gear mechanism 1. That is, the roller with cage assembly 2 according to the present embodiment is a roller with cage assembly for automobiles.

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

With reference to FIG. 1(B), each pinion gear 13 is rotatably supported on a pinion shaft 15 via a roller with retainer 2 according to the present embodiment. That is, the rollers with retainer 2 rotatably support 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 rollers with retainer 2. . Specifically, the caged roller 2 is composed of, for example, a plurality of rollers 20 and a cage 3, the outer peripheral surface of the pinion shaft 15 is the inner raceway surface, and the inner peripheral surface of the pinion gear 13 is the outer raceway surface. and The retainer 3 of this embodiment is used in an outer ring guide. The rollers 20 of this embodiment are needle rollers.

An oil passage hole 16 for supplying lubricating oil is formed inside the pinion shaft 15 . In this manner, the rollers 20 are lubricated by guiding the lubricating oil to the outer peripheral surface of the pinion shaft 15 through the oil passage holes 16 formed inside the pinion shaft 15 . Specifically, the oil passage hole 16 includes a first oil passage hole 16a extending in the axial direction from the right side of the paper surface of FIG. and an oil passage hole 16b. The lubricating oil supplied from the

oil passage holes

16 a and 16 b of the pinion shaft 15 passes through the clearances between the rollers 20 of the column portion 31 and lubricates the outer peripheral surfaces of the rollers 20 .

When the planetary gear mechanism 1 is used in the transmission of automobiles, which are becoming more and more geared, the amount of lubricating oil supplied to the caged rollers 2 is reduced in order to further improve the fuel efficiency of the automobile. lubricating oil may be supplied. The kinematic viscosity of the lubricating oil used to improve the fuel efficiency of such automobiles is, for example, 2 centistokes (cSt) to 8 centistokes (cSt) at 100°C.

(Embodiment 1)
Next, the retainer 3 in this embodiment will be described with reference to FIGS. 2 to 5. FIG.

The retainer 3 has a pair of annular portions 30 and a plurality of pillars 31 extending in the axial direction and connecting the pair of annular portions 30 to each other. A pocket portion 50 for accommodating the roller 20 (FIG. 1(B)) is provided between the adjacent column portions 31 . The pocket portions 50 are partitioned between the pillar portions 31 adjacent in the circumferential direction, and are provided in plurality at intervals in the circumferential direction. The column portion 31 is, for example, a straight retainer, and the upper portion of the center portion in the axial direction is recessed toward the inner diameter side. In the following description, the direction along the axis (central axis) of the roller with cage 2 is defined as "axial direction", the direction perpendicular to the axis is defined as "radial direction", and the The circumferential direction is called the "circumferential direction".

The retainer 3 is made of resin. This allows the projections and recesses to be easily manufactured by injection molding. Any retainer material may be used as long as it has sufficient mechanical strength. Reinforcing fibers may be mixed in order to improve mechanical strength. Examples of cage materials include polyetheretherketone (PEEK), polyphenylene sulfide (PPS), polyamide 6 (PA6) resin, polyamide 4-6 (PA46) resin, polyamide 6-6 (PA66), and polyamide 9T (PA9T). and other resins. The resin retainer 3 has a small specific gravity and can be light in weight, and even when it contacts with the rollers 20 with a small contact area, the contact surface pressure does not become excessive, and wear is less likely to occur.

The pillars 31 extend substantially parallel to the axial direction along the axis, and are arranged in plurality at intervals in the circumferential direction. Each column 31 has one end integrally coupled with one annular portion 30 and the other end integrally coupled with the other annular portion 30 .

3 and 4, the column portion 31 has roller guide surfaces 40 for guiding the rollers 20 and first and second outer roller guide surfaces 40 on the wall surface facing the pocket portion 50 (the surface facing the adjacent column portion 31). It includes radial side recesses 32 and 33 , first to third inner diameter side recesses 34 , 35 and 36 , an outer diameter side roller stop portion 41 and an inner diameter side roller stop portion 42 .

The roller guide surface 40 is a surface that contacts the rolling surface of the roller 20 and guides the roller 20 so that it can roll. 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 .

Outer diameter side roller stop portions 41 are provided on the outer diameter side of the roller guide surface 40 respectively. The outer diameter side roller stop portion 41 protrudes toward the pocket portion 50 from the roller guide surface 40 . As shown in FIG. 5, the outer diameter side roller stop portions 41 are provided on both sides of the pocket portion 50 in the circumferential direction to form a pair. The interval between the outer diameter side roller stop portions 41 facing each other across the pocket portion 50 is smaller than the diameter of the roller 20 . Thereby, the outer diameter side roller stop portion 41 restricts the movement of the roller 20 radially outward. The outer diameter side roller stop portion 41 is a so-called outer claw.

A pair of inner diameter side roller stop portions 42 are provided on the inner diameter side of the roller guide surface 40 . The inner diameter side roller stop portion 42 protrudes toward the pocket portion 50 from the roller guide surface 40 . As shown in FIGS. 3 and 4, the inner diameter side roller stop portion 42 is provided between the roller guide surface 40 and the outer diameter side roller stop portion 41 described above. As shown in FIG. 5, the inner diameter side roller stop portions 42 are provided on both sides of the pocket portion 50 in the circumferential direction to form a pair. The interval between the inner diameter side roller stop portions 42 facing each other across the pocket portion 50 is smaller than the diameter of the rollers 20 . Thereby, the inner diameter side roller stop portion 42 restricts the movement of the roller 20 inward in the radial direction. The inner diameter side roller stop portion 42 is a so-called inner claw.

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 from the outer diameter to the inner diameter halfway in the radial direction. As shown in FIG. 4B, it is preferable that the first and second outer diameter side recessed

portions

32 and 33 have substantially the same circumferential recess dimension and substantially the same radial dimension. The first outer diameter side recessed portion 32 is located in the center of the column portion 31 in the axial direction. Specifically, the first outer diameter recessed portion 32 is sandwiched between a pair of roller guide surfaces 40 in the axial direction. A pair of second outer diameter recessed portions 33 are provided, and are 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.

The first to third inner diameter side recessed

portions

34, 35, 36 are recessed in the circumferential direction from the roller guide surface 40 and extend continuously from the first and second outer diameter side recessed

portions

32, 33 to the inner diameter side. As shown in FIG. 4B, it is preferable that the first to third inner diameter side recessed

portions

34, 35, and 36 have substantially the same circumferential recess dimension and substantially the same radial dimension. The first inner diameter side recessed portion 34 is located in the center of the column portion 31 in the axial direction. Specifically, the first inner diameter side recessed portion 34 is sandwiched between a pair of inner diameter side roller stop portions 42 in the axial direction. A pair of the second inner diameter side recessed portions 35 are provided, and are provided between the inner diameter side roller stop portion 42 and the roller guide surface 40 in the axial direction. A pair of third inner diameter recesses 36 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 to third inner diameter recesses 34, 35, 36 are flat planes.

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 center portion of the column portion 31 in the axial direction. 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 stop portion 42, and the second outer diameter side recessed portion 33 is , are continuous with the third inner diameter recessed portion 36 at both ends in the axial direction. These boundary portions preferably extend straight in the axial direction while being separated at the inner diameter side roller stop portion 42 and the roller guide surface 40 .

As shown in FIG. 5, these boundaries may have an angle (edge) in the cross-sectional shape perpendicular to the axis, or may be arc-shaped. Furthermore, these boundary portions overlap with the radial position of the inner diameter side roller stop portion 42 . These boundaries are preferably located on the inner diameter side of the pitch circle PCD.

As described above, the pinion shaft 15 (FIG. 1B) is provided with the second oil passage hole 16b for supplying lubricating oil to the inner diameter side of the retainer 3. By locating the side recessed portion 34 near the central portion in the axial direction, the lubricating oil from the second oil passage 16b can be efficiently supplied to the outer diameter side. As a result, the first and second outer diameter side recesses 32, 33 and the first to third inner diameter side recesses 34, 35, 36 allow lubricating oil to flow from the inner diameter side to the outer diameter side or from the outer diameter side to the inner diameter side. It becomes the oil guide surface to guide. Further, the first and second outer diameter side recessed

portions

32, 33 and the first to third inner diameter side recessed

portions

34, 35, 36 also function as oil relief portions for releasing lubricating oil.

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

With reference to the figure, W1 is the distance between the first outer diameter recesses 32 of the pillars 31 facing each other across the pocket 50 partitioned between the pillars 31 adjacent in the circumferential direction, When the distance between the first inner diameter side recessed portions 35 of the pillars 31 facing each other across is set to W2, the relationship of W1>W2 is established. 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. As shown in FIG. Focusing on one column portion 31, the thickness of the first outer diameter side recessed portion 32 is defined as D1, and the thickness of the first outer diameter side recessed portion 32 is defined as D2. D1 is the thickness at the edge on the outer diameter side, and D2 is the thickness at the edge on the inner diameter side. In this embodiment, the thicknesses D1 and D2 are different, and the relationship of D1>D2 is established.

In order to explain the effects of the retainer 3 according to this embodiment, the configuration of a conventional resin retainer 103 will be described. Components similar to those of the first embodiment are given the same reference numerals as those of the first embodiment, and descriptions thereof are omitted.

(Conventional retainer)
7 to 9, conventional retainer 103 differs from the first embodiment in the configuration of the wall portion forming pocket portion 50 of column portion 131. As shown in FIG. The column portion 131 is provided with a central recessed portion 132 in its axially central portion. The central recessed portion 132 is positioned between the two pairs of roller guide surfaces 40 and the outer diameter side roller stop portion 41 . An axially outer recessed portion 133 is provided between each pair of roller guide surfaces 40 and outer diameter side roller stop portions 41 and the annular portion 30 . As shown in FIG. 8B, 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 from radially outward to inward toward the central axis L2 of the column portion 131 .

Referring to FIG. 9, W1 is the distance between the first outer diameter recessed portions 132 of the pillars 131 facing each other with the pocket 50 partitioned between the pillars 131 adjacent in the circumferential direction. When the distance between the inner diameter side recessed portions 132 of the pillars 131 facing each other with W4 is W4, the relationship of W1=W4 is established. 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. Furthermore, focusing on one column 131, the thickness of the central recessed portion 132 at the outer edge is defined as D1, and the thickness of the central recessed portion 132 at the inner diameter end is defined as D4. In the conventional retainer 103, the relationship of D1>D4 is established.

(Effect of Embodiment 1)
As described above, in the conventional retainer 103, W1=W4, and the circumferential thickness of the central recessed portion 132 of one column portion 131 satisfies D1>D4. As a result, the thickness in the circumferential direction 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 particular problem with the durability of the inner diameter side of the column portion 131 .

On the other hand, in the present embodiment, W1>W2, so that the circumferential thickness D2 (FIG. 5) of the central recessed portion 132 is equal to that of the first inner diameter recessed portion 35 of the conventional resin retainer 103. can be greater (D2>D4) than the circumferential thickness D4 (FIG. 9). This makes it possible to improve the durability of the column portion 131 as compared with the conventional retainer 103 .

Furthermore, since the

recesses

32, 33, 34, 35, and 36 are provided, lubricating oil can be efficiently supplied to the

roller stop portions

41 and 42, which are subjected to a severe lubrication environment, and wear of the

roller stop portions

41 and 42 can be minimized. is suppressed, the occurrence of peeling in the roller 20 can be suppressed, and the service life of the roller with cage 2 can be extended.

Further, according to the present embodiment, since the recessed

portions

32, 33, 34, 35, and 36 are provided, it is possible to easily supply the lubricating oil, thereby extending the service life of the caged roller 2 and saving fuel. The effect is great when applied to the planetary gear support structure in the transmission of automobiles, where the lubrication environment for bearings is becoming severer with the increase in size.

(Embodiment 2)
A retainer 3A according to Embodiment 2 will be described with reference to FIG. A retainer 3A according to the second embodiment has basically the same configuration as the retainer 3 according to the first embodiment, but differs mainly in the shape of the central portion of the column. Therefore, the same reference numerals are given to the same configurations as in the first embodiment, and the description thereof will not be repeated.

In a cross section perpendicular to the axis of the retainer 3, the first outer diameter side recessed portion 32 extends parallel to the radial center line L2 of the radially extending pocket portion 50, and the second inner diameter side recessed portion 35A. does not extend parallel to the radial centerline L2 of the radially extending pocket portion 50, and is inclined toward the pocket portion 50 side toward the inner diameter side.

With reference to the figure, in the present embodiment as well, the gap between the first outer diameter recessed portions 32 of the pillars 31 facing each other across the pocket 50 partitioned between the pillars 31 adjacent in the circumferential direction is When the distance is W1 and the distance between the first inner diameter recessed portions 35 of the pillars 31 facing each other with the pocket portion 50 interposed therebetween is W3, the relationship of W1>W3 is established. 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. As shown in FIG. Further, focusing on one columnar portion 31, the thickness of the first outer diameter side recessed portion 32 is set to D1, and the thickness of the first inner diameter side recessed portion 35A is set to D3. The thickness D3 of the first inner diameter side recessed portion 35A of the present embodiment is larger than the thickness D2 of the first inner diameter side recessed portion 35 of the first embodiment.

Also in this embodiment, since W1>W3, the circumferential thickness D3 (FIG. 6) of the first inner diameter side recessed portion 35A is less than that of the inner diameter side central recessed portion 132 of the conventional resin retainer 103. It can be greater than the circumferential thickness D4 (FIG. 9). Furthermore, in the present embodiment, the thickness D3 in the circumferential direction 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 in the first embodiment. , durability can be improved more than the retainer 3 of the first embodiment.

In the above-described embodiment, needle rollers are used as the rollers 20 housed in the pocket portion 50, but they are not limited to this, and may be cylindrical rollers, bar rollers, or the like.

In the above-described embodiments, the

retainers

3 and 3A have a pair of annular portions and are straight type retainers in which the column portions 31 are not bent. A cage, a so-called V-shaped cage that does not have a pair of annular portions 30, or the like may be used.

In the above embodiment, the pair of outer roller stop portions 41 sandwiches the pair of inner roller stop portions 42 . are aligned in the radial direction.

The first and second outer diameter side recessed

portions

32, 33 and the first to third inner diameter side recessed

portions

34, 35, 36 of Embodiments 1 and 2 are not limited to flat planes, and may be concave curved surfaces or convex portions. It may be a curved surface or a surface combining various shapes. For convenience of explanation, the first and second outer diameter recesses 32, 33 and the first to third inner diameter recesses 34, 35, 36 were separately described. , and they may be provided in series in the axial direction, and at least one outer diameter side recess and one inner diameter side recess may be provided. In this case, it is sufficient that the outer diameter side recessed portion and the inner diameter side recessed portion have different angles of inclination with respect to the center line L2 of the

column portions

3 and 3A.

The embodiments disclosed this time should be considered illustrative in all respects and not restrictive. The scope of the present invention is indicated by the scope of the claims rather than the above description, and is intended to include all modifications within the meaning and range of equivalents of the scope of the claims.

1 planetary gear mechanism, 2 rollers with cage, 3, 3A cage, 11 ring gear, 12 sun gear, 13 pinion gear, 14 carrier, 15 pinion shaft, 20 rollers, 30 annular part, 31 column part, 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 third Inner diameter recessed portion, 40 roller guide surface, 41 outer diameter roller stopper portion, 42 inner diameter roller stopper portion, 50 pocket portion, 103 retainer, 103 retainer, 131 column portion, 132 central recessed portion.

Claims

comprising a pair of annular portions and a plurality of pillars extending in the axial direction and connecting the pair of annular portions;
The column portion includes a roller guide surface that guides the roller, an outer diameter side concave portion that is recessed in the circumferential direction from the roller guide surface and extends from the outer diameter toward the inner diameter to an intermediate position in the radial direction, and the roller guide surface. an inner diameter side recess that is recessed further in the circumferential direction and extends continuously from the outer diameter side recess to the inner diameter side,
W1 is the distance between the outer diameter side recessed portions of the pillars facing each other across a pocket partitioned between the pillars adjacent in the circumferential direction, and the inner diameters of the pillars facing each other across the pocket. A resin retainer that satisfies a relationship of W1>W2, where W2 is the distance between the side recessed portions.
In a cross section perpendicular to the axis of the resin cage,
The outer diameter recess extends in parallel along the radial centerline of the pocket extending in the radial direction,
2. The resin retainer according to claim 1, wherein said inner diameter recessed portion extends in parallel along a radial centerline of said radially extending column portion.
In a cross section perpendicular to the axis of the resin cage,
The outer diameter recess extends parallel to the radial centerline of the pocket extending in the radial direction,
2. The resin retainer according to claim 1, wherein said inner diameter side recessed portion is inclined toward said pocket portion side toward the inner diameter side.
an outer diameter side roller stop portion that protrudes toward the pocket portion and regulates the radially outer movement of the roller; and an inner diameter side roller stop portion that protrudes toward the pocket portion and regulates the radially inner movement of the roller. further comprising
4. The resin cage according to claim 2, wherein a boundary portion between said outer diameter side recessed portion and said inner diameter side recessed portion overlaps with a radial position of said inner diameter side roller stop portion.
a resin retainer according to any one of claims 1 to 4;
A needle roller with a resin retainer, comprising a needle roller held in the pocket portion.
A planetary gear comprising an internal gear, a sun gear arranged 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 gear, is rotatably supported by a pinion shaft provided on the carrier via a rolling bearing,
A planetary gear support structure, wherein the rolling bearing is the needle roller with a resin retainer according to any one of claims 1 to 5.