JP2005188590A - Cylindrical roller bearing assembly jig - Google Patents

Abstract

Provided is a cylindrical roller bearing assembly jig capable of smoothly and easily inserting and assembling an inner ring assembly into an outer ring without hanging cylindrical rollers and cages.
A cylindrical roller bearing assembling jig 24 simultaneously and individually attaches a plurality of cylindrical rollers so that a center Ec of a circle E intersecting a central axis T of the plurality of cylindrical rollers 18 coincides with a center of an inner ring 16. A plurality of comb portions 26 arranged in an annular shape that can be held, and an annular flange portion 28 that supports the plurality of comb portions. In a state where the plurality of cylindrical rollers are held by the plurality of comb portions of the assembly jig, each cylindrical roller maintains the same pitch diameter of the roller set, and the inner ring and the plurality of cylinders with respect to the center of the outer ring 14. The centers of the rollers all coincide. Then, the inner ring assembly 22 can be smoothly inserted into the outer ring and assembled without centering between the outer ring and the inner ring assembly by simply moving the inner ring assembly 22 in the direction of the outer ring with an assembly jig.
[Selection] Figure 1

Description

  The present invention relates to a jig (cylindrical roller bearing assembly jig) used when assembling a radial bearing (cylindrical roller bearing) using cylindrical rollers as rolling elements.

  Conventionally, various apparatuses using cylindrical roller bearings are known. In the railway vehicle gear apparatus shown in FIG. 3 (a), the small gear shaft 2 and the large gear shaft 4 are formed of cylindrical roller bearings 6,10. The rotational motion R1 of one gear shaft (for example, the small gear shaft 2) is transmitted to the large gear 4a via the small gear 2a, and the large gear shaft 4 is moved in the R2 direction. It can be rotated (for example, patent document 1). More specifically, the small gear shaft 2 is rotatably supported by the shaft case 8 via the cylindrical roller bearing 6, and the large gear shaft 4 is rotated by the support frame 12 via the cylindrical roller bearing 10. The support frame 12 is fixed to the shaft case 8. The cylindrical roller bearings 6 and 10 include an outer ring 14 having a collar 14a on one side, an inner ring 16 having a collar 16a on both sides, a plurality of cylindrical rollers 18 interposed between the inner and outer rings so as to be freely rotatable, A plurality of cylindrical rollers 18 are configured to be provided with a cage 20 that can roll freely at a predetermined interval. In the following description, a configuration in which the inner ring 16, the plurality of cylindrical rollers 18, and the cage 20 are combined. This is referred to as an inner ring assembly 22 (FIG. 3B).

  As an assembling method of such a bearing structure, for example, as shown in FIG. 3B, the outer ring 14 attached to the shaft case 8 is in the direction of arrow S (horizontal axis direction) from the side where no collar is formed. By inserting and assembling the inner ring assembly 22, the small gear shaft 2 can be rotatably supported on the shaft case 8 via the cylindrical roller bearing 6. Further, for example, as shown in FIG. 3C, the inner ring assembly 22 is inserted in the direction of the arrow S (horizontal axis direction) from the side where the collar is not formed with respect to the outer ring 14 attached to the support frame 12. By assembling, the large gear shaft 4 can be rotatably supported on the support frame 12 via the cylindrical roller bearing 10.

By the way, in the conventional method for assembling the bearing structure (FIGS. 3B and 3C), when the inner ring assembly 22 is inserted into the outer ring 14, the cylindrical roller 18 and the cage 20 hang down in the arrow H direction (vertical direction). As a result, it may be difficult to align the center between the outer ring 14 and the inner ring assembly 22. More specifically, the retainer 20 is formed with a plurality of pockets (not shown) that individually hold the respective cylindrical rollers 18 so as to freely roll, and the cylindrical rollers 18 are accommodated and held in the respective pockets. In the state, a slight gap is formed between the cylindrical roller 18 and the pocket inner periphery. When the inner ring assembly 22 is inserted into the outer ring 14 as shown in FIGS. 3B and 3C in such a state, the plurality of cylindrical rollers 18 are displaced by the gap between the cylindrical roller 18 and the pocket inner periphery. As a result, it becomes difficult to align the center between the outer ring 14 and the inner ring assembly 22. In this case, it becomes difficult to assemble the bearing structure, and if the inner ring assembly 22 is forcibly inserted into the outer ring 14 in a state where the cylindrical roller 18 and the retainer 20 are suspended, the outer ring 14 is caused by the suspended cylindrical roller 18. The raceway surface 14b may be damaged, or the cage 20 may be deformed by a force applied during insertion and assembly.
JP 2000-18342 A

  The present invention has been made to solve such problems, and its purpose is to allow the inner ring assembly to be smoothly and easily inserted and assembled into the outer ring without causing the cylindrical rollers or the cage to hang down. An object of the present invention is to provide a cylindrical roller bearing assembly jig.

In order to achieve such an object, the present invention provides an outer ring, an inner ring, a plurality of cylindrical rollers that are rotatably inserted between the inner and outer rings, and a plurality of cylindrical rollers that roll at predetermined intervals. An assembly jig for a cylindrical roller bearing provided with a cage that can be freely held, and the center of a circle that intersects the central axis of each cylindrical roller coincides with the center of the inner ring or the outer ring. As described above, there are provided a plurality of annularly arranged comb portions that can hold the plurality of cylindrical rollers simultaneously and individually, and an annular flange portion that supports the plurality of comb portions.
In this case, in a state where the plurality of cylindrical rollers are held by the plurality of comb portions of the assembling jig, each cylindrical roller is arranged such that the center of the circle intersecting with the central axis of each cylindrical roller coincides with the center of the inner ring or the outer ring. The roller sets are maintained in the same pitch diameter.
In addition, a plurality of holding pockets each including a pair of arc-shaped holding surfaces capable of individually holding each cylindrical roller in axial contact with the outer surfaces of the plurality of cylindrical rollers are provided between the plurality of comb portions. The curvature radius of each holding pocket is set to be slightly larger than the curvature radius of the cylindrical roller. Specifically, the curvature radius of the plurality of holding pockets is set to be larger by 0.2 to 0.8 mm than the curvature radius of the cylindrical roller.
Such a cylindrical roller bearing assembly jig includes a specification in which an inner ring assembly in which an inner ring, a plurality of cylindrical rollers and a cage are combined is inserted into the outer ring and assembled, or an outer ring, a plurality of cylindrical rollers and a cage are combined. The outer ring assembly can be extrapolated to the inner ring.
In the specification for inserting and assembling the inner ring assembly into the outer ring, the outer diameter of the assembly jig is set to be slightly smaller than the nominal inner diameter of the raceway surface of the outer ring. The inner diameters of the plurality of comb parts are composed of a small diameter part set to be relatively smaller than the outer diameter of the cage and a large diameter part set to be relatively larger than the outer diameter of the cage. When the assembly jig is inserted into the outer ring and assembled, the large diameter portion is inserted into the outer diameter side of the cage, and a step formed at the boundary between the small diameter portion and the large diameter portion is formed on the end surface of the cage. Abutting and moving the inner ring assembly toward the outer ring.
In the specification for attaching the outer ring assembly to the inner ring, the inner diameter of the assembly jig is set slightly larger than the nominal outer diameter of the raceway surface of the inner ring. Further, the outer diameter of the plurality of comb portions is composed of a large diameter portion set relatively larger than the inner diameter of the cage and a small diameter portion set relatively smaller than the inner diameter of the cage, and the outer ring assembly is assembled. When assembling by extrapolating to the inner ring with the jig for use, the small diameter portion is inserted into the inner diameter side of the cage, and the step formed at the boundary between the large diameter portion and the small diameter portion abuts the end surface of the cage, The outer ring assembly is moved toward the inner ring.

  ADVANTAGE OF THE INVENTION According to this invention, the cylindrical roller bearing assembly jig | tool which can insert and assemble an inner ring | wheel assembly smoothly and easily to an outer ring | wheel can be implement | achieved, without hanging down a cylindrical roller or a holder | retainer.

Hereinafter, a cylindrical roller bearing assembly jig according to an embodiment of the present invention will be described with reference to FIG. The cylindrical roller bearing to which the cylindrical roller bearing assembling jig of the present embodiment is applied and the apparatus using the cylindrical roller bearing (railway vehicle gear apparatus) are the same as those shown in FIG. The description of the configuration is omitted, and in the following description, only different parts are referred to.
As shown in FIGS. 1A to 1D, in the cylindrical roller bearing assembly jig 24 of the present embodiment, the center Ec of the circle E intersecting the central axis T of the plurality of cylindrical rollers 18 is the inner ring 16. A plurality of comb portions 26 arranged in an annular shape that can simultaneously and individually hold a plurality of cylindrical rollers 18 so as to coincide with the center (not shown), and an annular flange portion that supports the plurality of comb portions 26 28 are provided.

  In this configuration, in a state where the plurality of cylindrical rollers 18 are held by the plurality of comb portions 26 of the assembling jig 24, the roller diameters of the cylindrical rollers 18 are maintained in the same state. Thus, the center Ec of the circle E intersecting with the central axis T of each cylindrical roller 18 coincides with the center of the inner ring 16. The pitch diameter of the roller set refers to the diameter Ed of a circle E that intersects the central axis T at the center of one row of cylindrical rollers 18 in the cylindrical roller bearing. In this case, the pitch diameter Ed of the roller set can be set to an arbitrary diameter depending on the size and type of the cylindrical roller bearing, the purpose of use, the environment of use, and the like.

  Between the plurality of comb portions 26, a pair of arc-shaped holding surfaces M 1 and M 2 are provided which are in axial contact with the outer surfaces of the plurality of cylindrical rollers 18 and can individually hold the cylindrical rollers 18. A plurality of holding pockets P are provided, and the radius of curvature of each holding pocket P is set slightly larger than the radius of curvature of the cylindrical rollers 18. Specifically, the curvature radius of the plurality of holding pockets P is set to be larger by 0.2 to 0.8 mm than the curvature radius of the cylindrical roller 18.

  The outer diameter of the assembly jig 24 is set slightly smaller than the nominal inner diameter of the raceway surface 14b of the outer ring 14. The nominal inner diameter refers to the diameter of a cylinder including the surface of the cylindrical inner diameter surface (track surface 14b), and is a reference value for the dimensional difference of the actual inner diameter surface. In this case, the nominal inner diameter can be set to an arbitrary diameter depending on the size and type of the cylindrical roller bearing, the purpose of use, the usage environment, and the like.

  On the other hand, the inner diameters of the plurality of comb parts 26 of the assembly jig 24 are set to be relatively smaller than the outer diameter of the cage 20 and the small diameter part 26 a set relatively smaller than the outer diameter of the cage 20. The large-diameter portion 26b. Specifically, the small diameter portion 26 a is set to have an inner diameter that approximates the PCD (Pitch Circle Diameter) of the plurality of cylindrical rollers 18, while the large diameter portion 26 b is slightly smaller than the outer diameter of the cage 20. Is set to a large inner diameter. The outer diameter of the cage 20, the inner diameter of the small diameter portion 26a, or the inner diameter of the large diameter portion 26b can be set to an arbitrary diameter depending on the size and type of the cylindrical roller bearing, the purpose of use, or the use environment. Since this is possible, there is no particular numerical limitation here.

  According to such a configuration, when the inner ring assembly 22 in which the inner ring 16, the plurality of cylindrical rollers 18 and the cage 20 are combined is inserted into the outer ring 14 by the assembly jig 24 and assembled, the large-diameter portion 26 b becomes the cage. 20 is inserted on the outer diameter side, and at this time, a stepped portion 26c formed at the boundary between the small diameter portion 26a and the large diameter portion 26b abuts on the end surface of the retainer 20, and the end surface of the retainer 20 is moved in the arrow S direction. The inner ring assembly 22 can be moved in the direction of the outer ring 14.

  At this time, the plurality of cylindrical rollers 18 held in the plurality of comb portions 26 (holding pockets P) of the assembling jig 24 maintain the same pitch diameter of the roller set (in other words, cylindrical The center Ec of the circle E intersecting with the central axis T of each cylindrical roller 18 coincides with the center of the inner ring 16 without causing the plurality of cylindrical rollers 18 to be displaced by the gap between the roller 18 and the inner periphery of the pocket. In this state, the center of the outer ring 14 and the center of the inner ring 16 and the plurality of cylindrical rollers 18 (the center of the circle E intersecting the central axis T of each cylindrical roller 18) Ec are all in agreement, and the assembly jig 24 By simply moving the inner ring assembly 22 in the direction of the outer ring 14, the inner ring assembly 22 can be smoothly and easily inserted into the outer ring 14 and assembled without performing centering between the outer ring 14 and the inner ring assembly 22. . As a result, there is no possibility that the raceway surface 14b of the outer ring 14 is damaged by the cylindrical roller 18 that hangs down as in the prior art, or that the cage 20 is deformed by the force applied during insertion and assembly.

The cylindrical roller bearing assembly jig 24 of the above-described embodiment has a specification to be assembled by inserting the inner ring assembly 22 into the outer ring 14, but is not limited to this, for example, as shown in FIG. As described above, the cylindrical roller bearing assembly jig 24 having a specification in which the outer ring assembly 30 in which the outer ring 14, the plurality of cylindrical rollers 18, and the retainer 20 are combined with the outer ring 14 is attached to the inner ring 16 can be obtained. it can.
In this modification, the outer ring 14 is provided with a flange 14a on both sides thereof, and the inner ring 16 is provided with a flange 16a on one side thereof.

  Further, the inner diameter of the assembly jig 24 is set to be slightly larger than the nominal outer diameter of the raceway surface 16b of the inner ring 16. The nominal outer diameter refers to the diameter of the cylinder including the cylindrical inner surface (track surface 16b), and is a reference value for the actual dimensional difference of the outer diameter surface. In this case, the nominal outer diameter can be set to an arbitrary diameter depending on the size and type of the cylindrical roller bearing, the purpose of use, the environment of use, and the like.

  On the other hand, the outer diameters of the plurality of comb parts 32 are a large diameter part 32 a set relatively larger than the inner diameter of the cage 20, and a small diameter part 32 b set relatively smaller than the inner diameter of the cage 20. It is composed of Specifically, the large diameter portion 32 a is set to have an inner diameter that approximates the PCD (Pitch Circle Diameter) of the plurality of cylindrical rollers 18, while the small diameter portion 32 b is slightly smaller than the inner diameter of the cage 20. A small outer diameter is set. The inner diameter of the cage 20, the outer diameter of the large diameter portion 32a, or the outer diameter of the small diameter portion 32b should be set to an arbitrary diameter depending on the size and type of the cylindrical roller bearing, the purpose of use, or the use environment. Therefore, the numerical value is not particularly limited here.

According to such a configuration, when the outer ring assembly 30 is inserted and assembled to the inner ring 16 by the assembly jig 24, the small diameter portion 32b is inserted into the inner diameter side of the cage 20, and at that time, the large diameter portion 32a and the small diameter portion The step 32c formed at the boundary with the portion 32b abuts on the end surface of the retainer 20, and the end surface of the retainer 20 is pressed in the direction of arrow S, thereby moving the outer ring assembly 30 in the direction of the inner ring 16. it can.
Other configurations and operational effects are the same as those of the above-described embodiment, and thus description thereof is omitted.

  In addition, the cylindrical roller bearing assembly jig 24 according to the embodiment and the modification may be molded by, for example, machining or resin molding using a mold. The material of the assembling jig 24 can be selected arbitrarily depending on the application, such as a metal material or a resin material. Further, the number of holding pockets P (the number of comb portions 26 and 32) can be arbitrarily set according to the number and size of the cylindrical rollers 18. Further, the lengths of the comb portions 26 and 32 can be arbitrarily set according to the length of the cylindrical roller 18 to which the comb portions 26 and 32 are applied.

(a) is a figure which shows the state which has inserted the inner ring assembly in the outer ring | wheel with the cylindrical roller bearing assembly jig | tool which concerns on one embodiment of this invention, (b) is the inner ring assembly and assembly which remove | excluded the holder | retainer. The front view which shows the structure with a jig | tool for use, (c) is a front view of a cylindrical roller bearing assembly jig, (d) is sectional drawing which follows the dd line | wire of the figure (c). The figure which shows the state which has externally inserted the outer ring assembly to the inner ring | wheel with the cylindrical roller bearing assembly jig | tool which concerns on the modification of this invention. (a) is a diagram showing an example of an apparatus using a cylindrical roller bearing, (b) is a diagram showing a state in which the inner ring assembly is inserted into the outer ring in the small gear shaft, and (c) is in the large gear shaft. The figure which shows the state which has inserted the inner ring | wheel assembly in the outer ring | wheel.

Explanation of symbols

14 Outer ring 16 Inner ring 18 Cylindrical roller 22 Inner ring assembly 24 Cylindrical roller bearing assembly jig 26 Comb portion 28 Flange E Circle Ec intersecting the central axis of the cylindrical roller T Center of the circle intersecting the central axis of the cylindrical roller T Center axis of the cylindrical roller

Claims (8)

A cylindrical roller bearing comprising an outer ring, an inner ring, a plurality of cylindrical rollers interposed between the inner and outer rings so as to be able to roll, and a cage for holding the plurality of cylindrical rollers so as to roll freely at a predetermined interval. An assembly jig,
The assembly jig includes
A plurality of comb portions arranged in an annular shape capable of holding a plurality of cylindrical rollers simultaneously and individually so that the center of a circle intersecting the central axis of each cylindrical roller coincides with the center of the inner ring or the outer ring;
A cylindrical roller bearing assembly jig comprising an annular flange portion for supporting the plurality of comb portions.   In a state where the plurality of cylindrical rollers are held by the plurality of comb portions of the assembling jig, each cylindrical roller is a roller so that the center of the circle intersecting with the central axis of each cylindrical roller coincides with the center of the inner ring or the outer ring. The cylindrical roller bearing assembly jig according to claim 1, wherein the pitch diameters of the sets are maintained in the same state.   Between the plurality of comb portions, a plurality of holding pockets each including a pair of arc-shaped holding surfaces capable of individually holding each cylindrical roller in axial contact with the outer surfaces of the plurality of cylindrical rollers are provided. 3. The jig for assembling a cylindrical roller bearing according to claim 1, wherein the curvature radius of each holding pocket is set to be slightly larger than the curvature radius of the cylindrical roller.   4. The jig for assembling a cylindrical roller bearing according to claim 3, wherein the curvature radius of the plurality of holding pockets is set to be larger by 0.2 to 0.8 mm than the curvature radius of the cylindrical roller.   The cylindrical roller bearing assembly jig according to any one of claims 1 to 4, wherein an outer diameter of the assembly jig is set to be slightly smaller than a nominal inner diameter of a raceway surface of the outer ring.   The cylindrical roller bearing assembly jig according to any one of claims 1 to 4, wherein an inner diameter of the assembly jig is set to be slightly larger than a nominal outer diameter of the raceway surface of the inner ring.   The inner diameter of the plurality of comb portions is composed of a small diameter portion set relatively smaller than the outer diameter of the cage and a large diameter portion set relatively larger than the outer diameter of the cage, and the inner ring and the plurality of cylinders When inserting and assembling an inner ring assembly that combines rollers and cages into the outer ring using an assembly jig, the large diameter part is inserted into the outer diameter side of the cage and at the boundary between the small diameter part and the large diameter part. The cylindrical roller bearing assembly jig according to any one of claims 1 to 5, wherein the formed step portion abuts on an end face of the cage and moves the inner ring assembly in the direction of the outer ring. The outer diameter of the plurality of comb portions is composed of a large diameter portion set relatively larger than the inner diameter of the cage and a small diameter portion set relatively smaller than the inner diameter of the cage. The outer ring and the plurality of cylindrical rollers When the outer ring assembly that combines the outer ring and the cage is inserted by being inserted into the inner ring by the assembly jig, the small diameter portion is inserted into the inner diameter side of the cage and formed at the boundary between the large diameter portion and the small diameter portion. The cylindrical roller bearing assembly jig according to any one of claims 1 to 4, wherein the stepped portion abuts against an end face of the cage and moves the outer ring assembly in the inner ring direction.

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