JP5465003B2 - Roller with cage and molding method of resin cage - Google Patents

Description

  The present invention relates to a roller with a cage in which a plurality of rollers are held by a resin cage, and a method for molding a resin cage.

  One type of rolling bearing is a roller with a cage that has no inner and outer rings and is composed of a cage 2 (FIG. 9) and a plurality of rollers. For example, as shown in FIG. 9, the conventional roller with cage has a column portion 4 on the pitch circle diameter PCD of the roller array where the distance between adjacent rollers is the narrowest. For this reason, the number of rollers 1 to be held by the pillar portion 4 is restricted, which is an obstacle to increasing the load capacity. In order to solve this, as shown in FIG. 10, a proposal has been made to increase the number of rollers by providing a column portion 4 at the outer diameter end of the cage 2 (Patent Document 1). Further, there are proposals in Patent Document 2 and Patent Document 3 as an extension of the structure of this proposal. In each of the proposed needle rollers with a cage, the cage 2 is made of metal and is formed by shaving or pressing. 9 and 10 show an example in which the roller 1 is a needle roller.

JP 2000-55145 A JP 2000-74071 A JP 2003-166540 A

In general, a metal cage is more expensive than a resin cage. Therefore, the cost is reduced by making the cage made of resin. However, producing the cage disclosed in Patent Documents 1 to 3 requires a lot of processing, and the cost can be reduced sufficiently. I found it difficult.

  This will be specifically described. For example, when the cage disclosed in Patent Document 1 (FIG. 10) is molded by injection molding, the mold shown in FIG. 11 is used. In the figure, the part with cross-hatching is a mold, and this mold 10 is composed of an outer mold 11 and an inner mold 12 which are divided into a plurality of outer mold division bodies 11A in the circumferential direction. FIG. 11 shows a cross section of a portion of the cage 2 where the column portion 4 is formed. A column forming cavity 14 is formed on the mating surface 13 of a pair of adjacent outer mold parts 11A. The hatched portion indicates the cross-sectional shape of the target column portion 4. The illustrated mold 10 is of a type in which the outer mold divided body 11A is pulled out to the outer diameter side and disassembled.

  When manufacturing the cage, the cavity 14 is filled with a resin material by injection, and after the resin material is cured, the mold 10 is disassembled to obtain a resin molded product 20 shown in FIG. The part 20a with cross-hatching in FIG. 12B in the resin-formed product 20 is removed by shaving to obtain the finished product 21 shown in FIG. Although this manufacturing method is simple, there is a problem that the manufacturing cost is high because secondary processing is necessary after injection molding.

  In order to form into the shape of the finished product 21 by only injection molding without secondary processing, it is necessary to make the shape of the cavity 14 without the part shown in white in FIG. It will not come out to the diameter side. It is possible to change the structure of the mold and form the finished product 21 by injection molding alone, but in order to do so, the structure of the mold is inevitable. If the structure of the mold is complicated, not only the cost of the mold becomes high, but also it is difficult to mold a cage having a small size.

  In a general resin cage (FIG. 9) in which the column portion continues from the outer diameter end to the inner diameter end of the cage, a protruding roller stopper 4a that prevents the roller 1 from dropping off to the outer diameter side is provided. It is provided in the part 4. Since this roller stopper 4a has a small amount of protrusion in the circumferential direction, even if the mold has a structure in which the outer mold divided body 11A is pulled out to the outer diameter side, by utilizing elastic deformation of the resin material, The outer mold part 11A can be pulled out over the circumferential step corresponding to the height. However, when the cage has the shape of FIG. 10, the step is too large and the outer mold divided body 11 </ b> A cannot be removed. If you try to force it out, the pillar 4 will break.

An object of the present invention is to provide a roller with a cage that can increase the load capacity by increasing the number of rollers and can mold a resin cage using a mold having a simple structure.
Another object of the present invention is to provide a molding method capable of efficiently molding the above-mentioned resin cage without secondary processing.

  The roller with cage according to the present invention includes a plurality of rollers and a resin cage that holds the plurality of rollers, and the cage includes a pair of parallel annular rings arranged in an axial direction, The rollers are connected to each other by a plurality of columns arranged in the circumferential direction, and each of the rollers is accommodated in each pocket formed between a pair of adjacent columns, and the columns are separated from each other in the radial direction. It is characterized by being divided into a side portion and an inner diameter side portion.

  According to this configuration, by dividing the column portion into an outer diameter side portion and an inner diameter side portion that are separated from each other in the radial direction, the thickness of the column portion on the pitch circle diameter of the roller arrangement is zero, or Can be narrowed. Thereby, the space | interval of a roller arrangement | sequence can be narrowed, the number of rollers can be increased, and load capacity can be raised. Further, if the column portion is divided into an outer diameter side portion and an inner diameter side portion, the lubricating oil can go back and forth in the circumferential direction between the outer diameter side portion and the inner diameter side portion, so that the lubricity is good.

The above effect can also be obtained by providing the column portion only on the outer diameter side of the cage (FIG. 10). However, in the case of using a mold having a simple structure for pulling the outer mold divided body to the outer diameter side (FIG. 11), it is difficult to pull the outer mold divided body to the outer diameter side. Therefore, as explained in the section “Problems to be solved by the invention”, the outer mold divided body must be once formed into a shape that can be pulled out and then finished into a finished product shape by secondary processing. .
On the other hand, if it is the shape of this invention, an outer-type division body can be extracted to an outer-diameter side using the elastic deformation of a resin material. Therefore, the resin cage can be formed only by injection molding, and the manufacturing cost can be reduced.

Radially outer portions of the front Kibashira portion is a cross-sectional shape to prevent the said rollers housed in the pocket falling off the outer diameter side and inner diameter side portion of the pillar portion is accommodated in said pocket the rollers Ru sectional shape der to prevent the falling off the inner diameter side.
If the outer diameter side portion and the inner diameter side portion of the column portion have the above-described cross-sectional shape, it is possible to prevent the rollers from falling off to the outer diameter side and the inner diameter side.

Cross-sectional shape of the outer diameter side portion of the front Kibashira unit includes a fan-shaped portion positioned centered on the inner diameter side of the cage, the position of the large diameter side than the pitch circle diameter of the row of the rollers in the sides of the scallops it in a projecting portion projecting outwardly, each sector portion shall be the shape facing surface of the fan-shaped portion of the adjacent pair of column portions is widened spacing as parallel or radially outer side with one another.
If the outer diameter side portion of the column portion has the above-described cross-sectional shape, the protrusion can prevent the roller from dropping to the outer diameter side. Further, if the outer diameter side portion has the above cross-sectional shape, the mold for molding the cage is composed of an outer mold divided into a plurality of outer mold division bodies in the circumferential direction and an inner mold, which are adjacent to each other. When the cavity is formed on the mating surface of the pair of outer mold divided bodies and the outer mold divided body is pulled out to the outer diameter side and disassembled, the outer mold divided body is easily pulled out to the outer diameter side. That is, each sector has a shape in which the opposing surfaces of the sector portions of a pair of adjacent pillars are parallel to each other or have a shape in which the distance increases toward the outer diameter side. Therefore, for the sector part, the outer mold divided body is pulled out to the outer diameter side. It will not be an obstacle. The protrusion enters the inner side in the circumferential direction from the mating surface of the outer mold divided body, but the amount of the protrusion is relatively small with respect to the circumferential width of the entire outer mold divided body. It is possible to pull out the outer mold divided body to the outer diameter side by overcoming the protruding portion by utilizing the elasticity of.

The protrusion may be provided only in a central portion between the pair of annular portions in the column portion.
Even if the protrusion is provided only at the central portion between the pair of annular portions, an effect of preventing the roller from dropping off to the outer diameter side can be obtained.

In this invention, the inner diameter side portion of the column part may be divided between the pair of annular parts and divided into a part integral with one annular part and a part integral with the other annular part. Good.
If the inner diameter side portion of the column portion is divided into a pair of portions, the lubricating oil can pass between the outer diameter side and the inner diameter side through the pair of portions, further improving the lubricity.

The protrusion is provided only at a central portion between the pair of annular portions in the column portion, and an inner diameter side portion of the column portion is divided between the pair of annular portions, and one annular ring is formed. When it is divided into a part integral with the part and a part integral with the other annular part, the axial position of the tip of each part is the same as both ends of the projection part or between the pair of annular parts It should be on the outside in the axial direction.
According to this structure, in addition to the fact that the inner diameter side portion of the column portion is divided into a pair of parts, the lubricating oil can go back and forth between the outer diameter side and the inner diameter side through the pair of parts. The axial position of the tip of the protrusion is the same as both ends of the protrusion, or the outer side in the axial direction between the pair of annular portions, so that the lubricating oil that has flowed from the inner diameter side to the outer diameter side of the inner diameter side portion It becomes easy to come out to the outer diameter side of the outer diameter side portion through the axially outer side of the protruding portion of the diameter side portion, and the lubricity is further enhanced.

In the case where each roller has a chamfer portion at both ends, the two portions of the inner diameter side portion of the column portion each have a tip that is more than the pair of annular rings than the chamfer portion of the roller housed in the pocket. It is good to protrude to the axial direction inner side between parts.
Thereby, at least a part of the two portions of the inner diameter side portion of the column portion always overlaps the roller in the axial direction. Therefore, it is possible to reliably prevent the rollers from dropping out toward the inner diameter side.

Both or one of the two portions of the inner diameter side portion of the column portion may be tapered.
Even if the inner diameter side portion of the column portion is tapered, it is possible to prevent the rollers from dropping to the inner diameter side.

In the present invention, the outer diameter side portion of the column part may have an inner diameter end located on the inner diameter side of the pitch circle diameter of the roller arrangement.
Even if the inner diameter end of the outer diameter side portion of the column portion is located on the inner diameter side of the pitch circle diameter of the roller arrangement, the number of rollers can be reduced by reducing the circumferential width of the outer diameter side portion on the pitch circle diameter. To increase the load capacity.

In this invention, it is preferable that the inner diameter side portion of the column portion is located on the inner diameter side of the pitch circle diameter of the roller arrangement.
If the entire inner diameter side portion of the column portion is positioned on the inner diameter side of the pitch circle diameter of the roller arrangement, it is easy to avoid the inner diameter side portion from interfering with the rollers. Therefore, the number of rollers can be increased without difficulty.

In the present invention, the roller may be a needle roller.
In the case of needle rollers, the load capacity can be increased by increasing the number of rollers according to the present invention, and the effect that a resin cage can be molded using a mold having a simple structure is conspicuous.

  According to the molding method of the resin cage of the present invention, a pair of parallel ring portions arranged in the axial direction are connected by a plurality of column portions arranged in the circumferential direction, and a roller is accommodated between a pair of adjacent column portions. Pockets are formed, and the column portion is divided into an outer diameter side portion and an inner diameter side portion that are separated from each other in the radial direction, and a cross-sectional shape of the outer diameter side portion of the column portion is on the inner diameter side of the cage. It consists of a fan-shaped part whose center is located, and a protruding part protruding outward from a position larger than the pitch circle diameter of the roller arrangement on both sides of this fan-shaped part, and each fan-shaped part has a pair of adjacent columns. A method of molding a resin cage in which the opposing surfaces of the fan-shaped part of the part are parallel to each other or have a shape in which the distance increases toward the outer diameter side, and the outer mold is divided into a plurality of outer mold divisions in the circumferential direction A cavity for forming a column part is formed on the mating surface of a pair of adjacent outer mold parts, which is an inner mold. Using a mold, the resin material filled in the cavity by injection, after the resin material is cured, characterized by decomposing the mold by far the outer divided body radially outwardly.

According to the molding method of the resin cage, the outer mold divided into a plurality of outer mold divisions in the circumferential direction and the inner mold, and the pillars on the mating surfaces of a pair of adjacent outer mold divisions A mold having a simple structure in which a cavity for partial molding is formed and the outer divided body is pulled out to the outer diameter side and disassembled can be used. For this reason, the cost of the mold is low, and it is possible to mold a cage having a small size. In addition, since the shape of the finished product can be obtained at the stage of disassembling the mold, secondary processing such as shaving is not necessary.
In the resin cage molded by this molding method, the cross-sectional shape of the outer diameter side portion of the column portion is a fan-shaped portion whose center is located on the inner diameter side of the cage, and a roller arrangement on both side surfaces of the fan-shaped portion. It consists of protrusions protruding outward from a position on the larger diameter side than the pitch circle diameter, and each fan-shaped part is parallel to the opposing surfaces of the fan-shaped parts of a pair of adjacent column parts or the distance increases toward the outer diameter side. Shape. Therefore, it is easy to remove the outer mold divided body to the outer diameter side. That is, the fan-shaped portion does not become an obstacle to pulling the outer mold divided body to the outer diameter side. The protrusion enters the inner side in the circumferential direction from the mating surface of the outer mold divided body, but the amount of the protrusion is relatively small with respect to the circumferential width of the entire outer mold divided body. It is possible to pull out the outer mold divided body to the outer diameter side by overcoming the protruding portion by utilizing the elasticity of.

The roller with cage according to the present invention includes a plurality of rollers and a resin cage that holds the plurality of rollers, and the cage includes a pair of parallel annular rings arranged in an axial direction, The rollers are connected to each other by a plurality of columns arranged in the circumferential direction, and each of the rollers is accommodated in each pocket formed between a pair of adjacent columns, and the columns are separated from each other in the radial direction. The column portion is divided into a side portion and an inner diameter side portion, and the outer diameter side portion of the column portion has a cross-sectional shape that prevents the roller accommodated in the pocket from dropping off to the outer diameter side, and the column portion The inner diameter side portion has a cross-sectional shape that prevents the roller accommodated in the pocket from dropping off toward the inner diameter side, and the cross-sectional shape of the outer diameter side portion of the column portion is centered on the inner diameter side of the cage. From the sector of the sector and the pitch circle diameter of the roller arrangement on both sides of this sector It in a projecting portion projecting outwardly from the position of the large diameter side, each sector portion, due to a shape facing surface of the fan-shaped portion of the adjacent pair of column portions is widened spacing as parallel or radially outer side with each other, The number of rollers can be increased to increase the load capacity, and a resin cage can be formed using a mold having a simple structure .
Another roller with a retainer of the present invention includes a plurality of rollers and a resin retainer that retains the plurality of rollers, and the retainer includes a pair of parallel annular portions arranged in the axial direction. The rollers are connected to each other by a plurality of columns arranged in the circumferential direction, and each of the rollers is accommodated in each pocket formed between a pair of adjacent columns, and the columns are separated from each other in the radial direction. The outer diameter side portion is divided into an inner diameter side portion, and the inner diameter side portion of the column portion is divided between the pair of annular portions, so that an integral part of one annular portion and the other annular portion Therefore, the load capacity can be increased by increasing the number of rollers, and a resin cage can be formed using a mold having a simple structure.
Still another roller with a retainer according to the present invention includes a plurality of rollers and a resin retainer that retains the plurality of rollers, and the retainer includes a pair of parallel annular portions arranged in the axial direction. Are connected by a plurality of columns arranged in the circumferential direction, and each of the rollers is received in each pocket formed between a pair of adjacent columns, and the columns are separated from each other in the radial direction. The outer diameter side portion is divided into an outer diameter side portion and an outer diameter side portion of the column portion, and the inner diameter end is located on the inner diameter side of the pitch circle diameter of the roller arrangement. The cage made of resin can be molded using a mold having a simple structure.

  According to the molding method of the resin cage of the present invention, a pair of parallel ring portions arranged in the axial direction are connected by a plurality of column portions arranged in the circumferential direction, and a roller is accommodated between a pair of adjacent column portions. Pockets are formed, and the column portion is divided into an outer diameter side portion and an inner diameter side portion that are separated from each other in the radial direction, and a cross-sectional shape of the outer diameter side portion of the column portion is on the inner diameter side of the cage. It consists of a fan-shaped part whose center is located, and a protruding part protruding outward from a position larger than the pitch circle diameter of the roller arrangement on both sides of this fan-shaped part, and each fan-shaped part has a pair of adjacent columns. A method of molding a resin cage in which the opposing surfaces of the fan-shaped part of the part are parallel to each other or have a shape in which the distance increases toward the outer diameter side, and the outer mold is divided into a plurality of outer mold divisions in the circumferential direction A cavity for forming a column part is formed on the mating surface of a pair of adjacent outer mold parts, which is an inner mold. Using a mold, the resin material is filled into the cavity by injection, and after the resin material is cured, the outer divided body is pulled out to the outer diameter side, and the mold is disassembled. Can be formed efficiently without the need.

(A) is sectional drawing of the roller with a retainer concerning embodiment of this invention, (B) is the IB-IB sectional drawing. (A) is sectional drawing of the cage | basket of the roller with the cage | basket, (B) is the IIB arrow directional view, (C) is the IIC-IIC sectional drawing. (A) is sectional drawing of a different holder | retainer, (B) is the IIIB arrow directional view, (C) is the IIIC-IIIC sectional drawing. (A) is a sectional view of a further different cage, (B) is a sectional view taken along arrow IVB, and (C) is a sectional view taken along IVC-IVC. It is sectional drawing of the assembly state of the metal mold | die which shape | molds the holder | retainer shown in FIG. It is sectional drawing which shows the state at the time of decomposition | disassembly of the metal mold | die. It is explanatory drawing which shows the cross-sectional shape of a different pillar part. Furthermore, it is explanatory drawing which shows the cross-sectional shape of a different pillar part. (A) is sectional drawing of the cage of the conventional roller with a cage, (B) is the IXB arrow directional view, (C) is the IXC-IXC sectional drawing. (A) is sectional drawing of the cage | basket of the roller with a cage of a proposal example, (B) is the XB arrow directional view, (C) is the XC-XC sectional drawing. It is sectional drawing of the assembly state of the metal mold | die which the holder | retainer shape | molds. (A)-(C) are explanatory drawings which show the formation process of the cage.

  An embodiment of the present invention will be described with reference to FIGS. FIG. 1 shows the entire roller with cage, and FIG. 2 shows the cage. This roller with a cage includes a plurality of rollers 1 and a resin cage 2 that holds the plurality of rollers 1. In this example, the roller 1 is a needle roller and has chamfer portions 1a at both ends. The roller 1 is made of steel such as bearing steel. The cage 2 has a structure in which a pair of parallel ring portions 3 arranged in the axial direction are connected by a plurality of column portions 4 arranged in the circumferential direction, and each of the cages 2 formed between a pair of adjacent column portions 4 is arranged. Each roller 1 is accommodated in the pocket 5. In FIG. 2A, only some of the pockets 5 are displayed, and the other pockets 5 are not shown.

  The column portion 4 of the cage 2 is divided into an outer diameter side portion 6 and an inner diameter side portion 7 which are separated from each other in the radial direction. The outer diameter side portion 6 includes a fan-shaped portion 6a and a protruding portion 6b that are outer diameter side portion main portions. In detail, the cross-sectional shape of the outer diameter side portion 6 protrudes outward from the fan-shaped part 6a whose center is located on the inner diameter side and the both side surfaces of the fan-shaped part 6a at the central part between the pair of annular parts 3. In the vicinity of the annular portion 3, the shape is composed of only the fan-shaped portion 6 a. That is, the protrusion 6 b is provided only at the center between the pair of annular portions 3. As for the sector-shaped part 6a of a pair of adjacent pillar part 4, the opposing surface 8 is mutually parallel. The radial position of the protrusion 6b is larger than the pitch circle diameter PCD of the roller arrangement. A distance L <b> 1 between the protruding portions 6 b of the pair of adjacent outer diameter side portions 6 that are adjacent to each other is smaller than the diameter D of the roller 1. Therefore, the outer diameter side portion 6 prevents the roller 1 accommodated in the pocket 5 from dropping off to the outer diameter side.

  In this example, the inner diameter end of the outer diameter side portion 6 is positioned on the inner diameter side with respect to the pitch circle diameter PCD, but is positioned on the outer diameter side with respect to the pitch circle diameter PCD and on the pitch circle diameter PCD, the column portion 4 is located. The structure which does not exist may be sufficient. Moreover, each fan-shaped part 6a may have a shape in which the opposing surface 8 of the fan-shaped part 6a of a pair of adjacent column parts 4 is widened toward the outer diameter side.

  The inner diameter side portion 7 of the column part 4 is entirely located on the inner diameter side of the pitch circle diameter PCD, and has a cross-sectional shape in which the corner portion of the inner peripheral end is cut off obliquely. A distance L <b> 2 between the opposing surfaces of the pair of adjacent inner diameter side portions 7 is smaller than the diameter D of the roller 1. Therefore, the inner diameter side portion 7 prevents the roller 1 accommodated in the pocket 5 from dropping out toward the inner diameter side.

  In the roller with cage of this configuration, the column portion 4 is divided into an outer diameter side portion 6 and an inner diameter side portion 7 which are separated from each other in the radial direction, so that the circumferential direction of the column portion 4 on the pitch circle diameter PCD. The width can be reduced. Thereby, it becomes possible to increase the filling rate of the roller 1 and increase the number of rollers, and to improve the load capacity. If the configuration is such that the column portion 4 does not exist on the pitch circle diameter PCD, the filling rate of the roller 1 can be further increased, but even with the configuration of FIGS. 1 and 2, a sufficient filling rate can be obtained. . Further, by dividing the column portion 4 into the outer diameter side portion 6 and the inner diameter side portion 7, the lubricating oil can pass in the circumferential direction between the outer diameter side portion 6 and the inner diameter side portion 7. Good lubricity.

  FIG. 3 shows a different embodiment of the cage. In this cage 2, the inner diameter side portion 7 of the pillar portion 4 is divided between a pair of annular portions 3 (3A, 3B), and a portion 7A integrated with one annular portion 3A and the other annular portion. It is divided into a part 7B integrated with 3B. The tip of each of the portions 7A and 7B is located on the outer side in the axial direction with respect to the protrusion 6b of the outer diameter side portion 6. As shown in FIG. 4, each part 7A, 7B may have a tapered shape.

  Also with this configuration, the inner diameter side portion 7 of the column portion 4 can prevent the rollers 1 accommodated in the pockets 5 from dropping out toward the inner diameter side. Further, if the inner diameter side portion 7 is divided into a pair of portions 7A and 7B, the lubricating oil can go back and forth between the outer diameter side portion 6 and the inner diameter side portion 7 in the circumferential direction. The region 7A, 7B can be passed between the outer diameter side and the inner diameter side, and the lubricity can be further improved. If the axial position of the tip of each part 7A, 7B of the inner diameter side portion 7 is on the outer side in the axial direction than the protrusion 6b of the outer diameter side portion 6, the flow of the lubricating oil in the radial direction is smooth.

  The cage 2 in each of the above embodiments is made of resin as described above. As the resin material for the cage 2, for example, a polyamide-based resin such as 46 nylon or 66 nylon, or a resin that can be injection molded such as PPS (polyferene sulfide) or PEEK (polyether ether ketone) is used.

  These resin cages 2 are formed by injection molding. FIG. 5 shows a cross section of a column forming part of a mold for forming the cage 2 of FIG. In the figure, the part with cross-hatching is a mold, and this mold 10 is composed of an outer mold 11 and an inner mold 12 which are divided into a plurality of outer mold division bodies 11A in the circumferential direction. A column forming cavity 14 is formed on a mating surface 13 of a pair of adjacent outer mold parts 11A. In the cross section of FIG. 5, the cavity 14 is divided into an outer diameter side partial molding portion 14a and an inner diameter side partial molding portion 14b.

  At the time of molding, the resin material 15 is filled into the cavity 14 by injection, and after the resin material 15 is cured, the outer mold divided body 11A is pulled out to the outer diameter side to disassemble the mold 10 as shown in FIG. . Each sector 6a has a shape in which the opposing surfaces 8 of the sector 6a of a pair of adjacent pillars 4 are parallel to each other. Therefore, for the sector 6a, an obstacle to pulling out the outer mold division 1A to the outer diameter side. Not. The protruding portion 6b enters the inner side in the circumferential direction from the mating surface 13 of the outer mold divided body 11A. The amount of the protruding portion 6b is relatively smaller than the circumferential width of the entire outer mold divided body 11A. Since it is small, it is possible to use the elasticity of the resin material 15 to get over the protrusion 6b and to extract the outer mold divided body 11A to the outer diameter side. Further, in this example, since the inner diameter end of the outer diameter side portion 6 has a sharp shape, the outer mold part 11A is smoothly removed from the outer diameter while gradually reducing the circumferential width of the outer diameter side portion 6. Can be pulled out to the side. That is, the cage 2 can be formed only by injection molding. Therefore, the manufacturing cost of the cage 2 can be suppressed.

  In each said embodiment, although the main part of the outer diameter side part 6 of the pillar part 4 is made into the fan-shaped part 6a of cross-sectional shape fan, the main part of the outer diameter side part 6 is cross-sectional shape like FIG. May be an isosceles triangle portion 6c of an isosceles triangle whose outer diameter side is a plane, or may be a deformed rhombus portion 6d having a deformed rhombus shape as shown in FIG. The inner diameter ends of the sector part 6a, the isosceles triangle part 6c, and the deformed rhombus part 6d may be chamfered.

  This roller with cage is used for automobiles, industrial machines, construction machines and the like. Specifically, it is used for supporting a gear with respect to a shaft in various reduction mechanisms such as a gear mechanism.

DESCRIPTION OF SYMBOLS 1 ... Roller 1a ... Chamfer part 2 ... Cage 3 ... Ring part 4 ... Column part 5 ... Pocket 6 ... Outer diameter side part 6a ... Fan-shaped part 6b ... Projection part 7 ... Inner diameter side part 7A, 7B ... Part 8 ... Opposite Surface 10 ... Mold 11 ... Outer mold 11A ... Outer mold segment 12 ... Inner mold PCD ... Pitch circle diameter of roller arrangement

Claims (12)

A plurality of rollers and a resin-made cage that holds the plurality of rollers, and the cage is composed of a plurality of column portions that are arranged in a circumferential direction with a pair of parallel annular portions arranged in the axial direction. Each of the rollers is accommodated in each pocket formed between a pair of adjacent pillars, and the pillars are divided into an outer diameter side portion and an inner diameter side portion that are separated from each other in the radial direction. The outer diameter side portion of the pillar portion has a cross-sectional shape that prevents the roller accommodated in the pocket from dropping off to the outer diameter side, and the inner diameter side portion of the pillar portion is accommodated in the pocket. The cross-sectional shape of the roller is prevented from falling off to the inner diameter side, and the cross-sectional shape of the outer diameter side portion of the column portion is a fan-shaped portion centered on the inner diameter side of the cage, and the fan-shaped portion Pushing outward from a position on the larger diameter side of the pitch circle diameter of the roller array on both sides of the roller Were made in the protruding portion, each sector unit, roller and cage assembly, wherein the opposing surface of the fan-shaped portion of the adjacent pair of column portions has a shape spreading interval as parallel or radially outer side with one another. 2. The roller with a retainer according to claim 1 , wherein the protrusion is provided only in a central portion between the pair of annular portions in the column portion. In Claim 2 , The inner diameter side part of the said pillar part is divided | segmented between said pair of annular parts, and is divided | segmented into the site | part integral with one annular part, and the site | part integral with the other annular part. A roller with a cage, wherein the axial position of the tip of each part is the same as both ends of the projection, or on the axially outer side between the pair of annular portions. 3. The inner diameter side portion of the column portion according to claim 1 or 2 , wherein the inner diameter side portion of the column portion is divided between the pair of annular portions, and a portion integral with one annular portion and a portion integral with the other annular portion. Roller with cage is divided into. A plurality of rollers and a resin-made cage that holds the plurality of rollers, and the cage is composed of a plurality of column portions that are arranged in a circumferential direction with a pair of parallel annular portions arranged in the axial direction. Each of the rollers is accommodated in each pocket formed between a pair of adjacent pillars, and the pillars are divided into an outer diameter side portion and an inner diameter side portion that are separated from each other in the radial direction. and, the inner diameter side portion of the pillar portion, the is divided between a pair of the annular portion, and cage assembly is divided into site for site and the other annular portion integral with one of the annular portion integrally Time. The roller according to any one of claims 3 to 5 , wherein each roller has a chamfer portion at both ends, and the tip of each of the two portions of the inner diameter side portion of the column portion is accommodated in the pocket. A roller with a cage that protrudes inward in the axial direction between the pair of annular portions than a chamfer portion of the rollers. The roller with a retainer according to any one of claims 3 to 6 , wherein two or both of the two portions of the inner diameter side portion of the column portion are tapered. The roller with a retainer according to any one of claims 1 to 7 , wherein an outer diameter side portion of the column portion has an inner diameter end positioned on an inner diameter side of a pitch circle diameter of the roller arrangement. A plurality of rollers and a resin-made cage that holds the plurality of rollers, and the cage is composed of a plurality of column portions that are arranged in a circumferential direction with a pair of parallel annular portions arranged in the axial direction. Each of the rollers is accommodated in each pocket formed between a pair of adjacent pillars, and the pillars are divided into an outer diameter side portion and an inner diameter side portion that are separated from each other in the radial direction. And the outer diameter side part of the said column part is a roller with a holder | retainer whose inner diameter end is located in an inner diameter side rather than the pitch circle diameter of a roller arrangement | sequence. The roller with a retainer according to any one of claims 1 to 7 , wherein the inner diameter side portion of the column part is located on the inner diameter side of the pitch circle diameter of the roller arrangement as a whole.   The roller with a retainer according to any one of claims 1 to 10, wherein the roller is a needle roller. A pair of parallel circular rings arranged in the axial direction are connected by a plurality of columns arranged in the circumferential direction, and a pocket for accommodating a roller is formed between a pair of adjacent columns, and the columns are mutually connected. It is divided into an outer diameter side portion and an inner diameter side portion that are separated in the radial direction, and the cross-sectional shape of the outer diameter side portion of the column portion is a fan-shaped portion centered on the inner diameter side of the cage, Projections projecting outward from a position larger than the pitch circle diameter of the roller arrangement on both side surfaces, and each sector is parallel to or opposite to the opposing surface of the sector of a pair of adjacent pillars. It is a molding method of a resin cage that has a shape in which the interval increases toward the diameter side,
A mold having an outer mold divided into a plurality of outer mold divisions in the circumferential direction and an inner mold, and a cavity for forming a column part formed on a mating surface of a pair of adjacent outer mold divisions. A method for forming a resin cage, comprising: filling a resin material into the cavity by injection and curing the resin material, and then removing the outer divided body to the outer diameter side to disassemble the mold. .

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