JP2013174301A - Pin-type cage and roller bearing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pin-type cage which is large in a diameter of an applicable bearing and also can reduce processing costs, and a roller bearing having the same.SOLUTION: A pin-type cage is formed of a plurality of members including a first ring 51, a second ring 52 and a plurality of pins. Each of the first ring 51 and the second ring 52 includes an annular body 88 constituted of a plurality of fan-shaped blocks 70 and a connecting member which connects the plurality of fan-shaped blocks 70 and continuous to the circumferential direction of the body 88.

Description

  The present invention relates to a pin type cage and a roller bearing.

  Conventionally, as a pin type retainer, there is one described in JP 2011-58592 A (Patent Document 1). The pin type retainer includes a first ring, a second ring, and a plurality of pins. The second ring faces the first ring in the axial direction of the first ring.

  The plurality of pins are arranged at intervals in the circumferential direction of the first ring, and each pin connects the first ring and the second ring. Each said pin is inserted in the through-hole of a tapered roller, and supports a tapered roller rotatably.

  The pin type cage supports the tapered roller with a pin so that it can rotate freely. Therefore, the circumferential distance between the tapered rollers can be reduced and the rated load can be increased compared to the cage that defines the pocket at the pillar. it can.

  However, the above-mentioned pin type cage has a problem that there is an upper limit of the diameter that can be processed into the ring, and there is a limit to enlargement. In addition, there is a problem that the larger the diameter of the pin type cage, the more difficult the processing becomes and the processing cost increases.

JP 2011-58592 A

  SUMMARY OF THE INVENTION An object of the present invention is to provide a pin type cage that can be applied with a large diameter bearing and can reduce processing costs, and a roller bearing including the pin type cage.

In order to solve the above problems, the pin type cage of the present invention is
A first ring having a plurality of through holes positioned at intervals in the circumferential direction;
A second ring having a plurality of through holes positioned at intervals in the circumferential direction;
A pin having one end inserted into the through hole of the first ring and the other end inserted into the through hole of the second ring, and a pin inserted into the through hole of the roller;
Each of the first ring and the second ring is
An annular body composed of a plurality of fan-shaped blocks;
The plurality of fan-shaped blocks are connected to each other, and a connecting member connected in the circumferential direction of the main body is provided.

  The term “continuous in the circumferential direction” means that no phase (0 [rad] ≦ θ <2π [rad]; where θ is a phase angle) does not exist in the circumferential direction of the main body. Say.

  According to the present invention, since a ring is formed by connecting a plurality of fan-shaped blocks in a ring shape with a connecting member, any number of large-diameter rings can be configured with a plurality of sectors. The large-diameter ring can be configured simply by preparing the block. Therefore, the applicable ring diameter can be increased.

  Further, according to the present invention, no matter how large the ring is, it is only necessary to form a sector block that can be composed of a plurality of rings. The processing cost can be reduced.

In one embodiment,
Each of the blocks has a through hole having two openings positioned at a distance in the circumferential direction of the main body on a circumferential surface facing the radial direction of the main body,
The connecting member passes through the through holes of the plurality of blocks.

  According to the above embodiment, each block has a through hole, and the connecting member is configured to pass through the through hole of the plurality of blocks. Therefore, the plurality of blocks can be reliably connected, and the block is detached from the main body. Can be prevented.

In one embodiment,
The connecting member is composed of a plurality of linear spring members.

  According to the embodiment, since the connecting member is composed of a plurality of linear spring members, an annular structure of the connecting member can be easily realized, and a plurality of blocks can be easily connected. The connection strength of the blocks can be increased.

In one embodiment,
The first ring has a wedge sandwiched between the blocks adjacent in the circumferential direction.

  According to the embodiment, since the first ring has the wedge sandwiched between the blocks adjacent in the circumferential direction, the diameter of the first ring formed by the block is changed in comparison with the case where the wedge does not exist. Can do. Moreover, in the some 1st ring containing the same block, the diameter of each 1st ring can also be varied by varying the angle of the apex angle of the wedge which each 1st ring has. Therefore, the application range of the block becomes wide, and convenience and versatility can be greatly improved.

The roller bearing of the present invention is
A first track ring;
A second race ring,
A pin type cage of the present invention;
A roller having an insertion hole through which the pin of the pin type retainer is inserted, held by the pin type retainer, and disposed between the first raceway ring and the second raceway ring; It is characterized by having.

  According to the present invention, it is possible to realize a roller bearing having a large diameter and a large rated load.

  ADVANTAGE OF THE INVENTION According to this invention, the diameter of the applicable bearing is large and it can implement | achieve the pin type holder | retainer which can also reduce processing cost, and it can implement | achieve a roller bearing with a large diameter and a large rated load.

It is a schematic cross section of the axial direction of the cylindrical roller bearing of one Embodiment of this invention. It is a perspective view of a part of the circumferential direction of the roller assembly of the cylindrical roller bearing. It is a perspective view of the cell which comprises the said roller assembly. It is a figure when the said cell is seen from the outer side of radial direction. It is a figure when a part of what the cylindrical roller does not exist in the said cell and a connection member are seen from the outer side of radial direction. It is a schematic cross section of the connecting member in the radial direction. It is a schematic cross section corresponding to Drawing 6 of a connecting member of a modification. It is a schematic diagram which shows a part of ring of a modification.

  Hereinafter, the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a schematic cross-sectional view in the axial direction of a cylindrical roller bearing according to an embodiment of the present invention.

  This cylindrical roller bearing includes an outer ring 1 as a first bearing ring, an inner ring 2 as a second bearing ring, and a roller assembly 7. The roller assembly 7 includes a plurality of cylindrical rollers 3 and a pin type holding member. A vessel (hereinafter simply referred to as a cage) 5 is integrated. Each cylindrical roller 3 has a through hole 31, and the through hole 31 extends along the central axis of the cylindrical roller 3.

  The cage 5 includes a first ring 51, a second ring 52, a plurality of pins 53, and a weld portion 54. The first ring 51 has a plurality of screw holes 61, and each screw hole 61 extends linearly from one end surface in the axial direction of the first ring 51 to the other end surface. Each of the screw holes 61 is a through hole, and the plurality of screw holes 61 are located at intervals in the circumferential direction of the first ring 51.

  The second ring 52 faces the first ring 51 in the axial direction of the first ring 51. The second ring 52 has a plurality of through holes 62, and each through hole 62 extends linearly from one end surface in the axial direction of the second ring 52 to the other end surface. The plurality of through holes 62 are located at intervals in the circumferential direction of the second ring 52.

  The pin 53 is inserted through the through hole 31 of the cylindrical roller 3. The first pin 53 has a first end 89 as one end and a second end 90 as the other end. The outer peripheral surface of the first end portion 89 has a male screw, and the male screw on the outer peripheral surface of the first end portion 89 and the screw hole 61 of the first ring 51 are fixed by screwing. On the other hand, the second end 90 is disposed in the through hole 62 of the second ring 52. The second end 90 is fitted in the through hole 62 of the second ring 52 with a gap.

  The weld 54 covers an opening on the opposite side of the through-hole 62 of the second ring 52 from the first ring 51 side in the axial direction. The weld 54 is present between the outer peripheral surface of the second end 90 of the first pin 53 and the inner peripheral surface of the through hole 62 of the second ring 52, and the second end of the first pin 53. A portion in contact with both the outer peripheral surface of 90 and the inner peripheral surface of the through hole 62 of the second ring 52 is provided. The weld 54 prevents the second end 90 from moving relative to the through hole 62 of the second ring 52. The weld 54, the second ring 52, and the second end 90 form an integral structure. The first pin 53 cannot be detached from the cage 5.

  The cylindrical roller 3 is disposed between the first ring 51 and the second ring 52. The plurality of cylindrical rollers 3 are positioned between the inner peripheral cylindrical raceway surface 11 of the outer ring 1 and the outer peripheral cylindrical raceway surface 21 of the inner ring 2 at a distance from each other while being held by the cage 5. Yes.

  FIG. 2 is a perspective view of a part of the roller assembly 7 in the circumferential direction.

  In FIG. 2, illustration of a connecting member, which will be described in detail later, is omitted. In FIG. 2, reference numeral 51 indicates the first ring, and reference numeral 52 indicates the second ring. As shown in FIG. 2, the roller assembly 7 is formed by connecting a plurality of identical cells 40 in a ring shape in the circumferential direction.

  FIG. 3 is a perspective view of one cell 40.

  As shown in FIG. 3, each cell 40 includes a first sector block 70, a second sector block 71, one cylindrical roller 3, one pin 53, and a weld 54 (see FIG. 1). ). The circumferential length of the cage 5 indicated by the arrow A in FIG. 3 of each of the first and second fan-shaped blocks 70 and 71 is slightly larger than the circumferential length of the cylindrical roller 3. . On the other hand, the radial length of the cage 5 indicated by the arrow B in FIG. 3 of each of the first and second fan-shaped blocks 70 and 71 is smaller than the radial length of the cylindrical roller 3. The cylindrical roller 3 protrudes in the radial direction from the first and second sector blocks 70 and 71 on both the outer side and the inner side in the radial direction.

  The first sector block 70 has only one screw hole 61 in the center, while the second sector block 71 has only one through hole 62 (see FIG. 1) in the center. In each cell 40, after the pin 53 is inserted through the through hole 31 (see FIG. 1) of the cylindrical roller 3, one end of the pin 53 is screwed into the screw hole 61 of the first sector block 70. The other end of the pin 53 is fixed to the through hole 62 of the first sector block 71 by welding.

  FIG. 4 is a view of the cell 40 as viewed from the outside in the radial direction.

  As shown in FIG. 4, the circumferential surface 85 of the first fan-shaped block 70 facing outward in the radial direction has a first opening 81 and a first gap positioned in the circumferential direction of the cage 5. The first fan-shaped block 70 has two through-holes 82 that connect the two openings 81 and 82. Similarly, the circumferential surface 91 of the second fan-shaped block 71 facing outward in the radial direction has a first opening 86 and a second opening that are spaced apart in the circumferential direction of the cage 5. The second fan-shaped block 71 having an opening 87 has a through hole 99 connecting these two openings 86 and 87.

  FIG. 5 is a view of a part of the cell 40 in which the cylindrical roller 3 does not exist and the connecting member 92 as viewed from the outer side in the radial direction. In FIG. 5, the connection structure of the second ring 52 will be described as an example, but the connection structure of the first ring 52 is the same as the connection structure of the second ring 52. The connection structure of the first ring 52 is omitted because of the connection structure of the first ring 52.

  As shown in FIG. 5, the connecting member 92 is inserted through the through hole 98 of the sector block 71 of each cell 40. The connecting member 92 passes through the through holes 98 of the plurality of fan-shaped blocks 71 constituting each ring 52, and extends in the circumferential direction across the plurality of fan-shaped blocks 71 constituting each ring 52. . Further, as shown in FIG. 5, the connecting member 92 has a width and is positioned in the axial direction between the blocks 71.

  FIG. 6 is a schematic cross-sectional view of the connecting member 92 in the radial direction.

  In addition, since the connection member 92 passes through the through hole 98 of each cell 40, the connection member 92 has a circular shape on the whole, but locally has a shape that is not a circular arc at a portion that passes through the through hole 98. . However, in FIG. 6, illustration of the shape which is not a local circular arc is abbreviate | omitted, and only a global circular shape is shown.

  As shown in FIG. 6, the connecting member 92 has three C-shaped linear spring members 93, 94, 95, and the thicknesses of the three spring members 93, 94, 95 are substantially the same. ing. Each of the spring members 93, 94, 95 has elasticity. Further, the inner diameter of the inner peripheral surface of the outer first spring member 93 is substantially the same as the outer diameter of the outer peripheral surface of the central second spring member 94. The inner diameter of the peripheral surface is substantially the same as the outer diameter of the outer peripheral surface of the inner third spring member 95.

  As shown in FIG. 6, the circumferential phase of the cage 5 in which the first spring member 93 does not exist (the phase of the break of the first spring member 93) and the cage 5 in which the second spring member 94 does not exist. Of the circumferential direction (phase of the cut of the second spring member 94) and the phase of the circumferential direction of the cage 5 where the third spring member 95 does not exist (phase of the cut of the third spring member 95). Both are different.

  The spring members 93, 94, 95 that are in contact with each other in the radial direction hardly move relative to each other due to the frictional force of each other, and the phase of each of the three spring members 93, 94, 95 may coincide. There is no such thing. Accordingly, the annular structure of the connecting member 92 is continuously maintained, and it is possible to take a structure in which the connecting member 92 is continuously connected in the circumferential direction.

  The schematic cross-sectional view of FIG. 1 corresponds to the cross-sectional view taken along the line DD of FIG. 6, and the schematic cross-sectional view of FIG. 1 shows the connection member 92 where the spring members 93, 94, 95 are composed of three layers. Represents. In FIG. 1, reference numeral 98 indicates a through hole of a block constituting the second ring 52.

  Referring to FIG. 6 again, each of the spring members 93, 94, 95 is used in a state where the diameter is larger than the diameter when no external force is applied. From this, the spring members 93, 94, 95 are arranged in a ring shape to apply a radially inward force indicated by an arrow C in FIG. 6 to the plurality of blocks 71 constituting the second ring 52. With this binding force, the plurality of blocks 71 are prevented from coming out of a circular shape. In other words, the second ring 52 has a structure in which a plurality of fan-shaped blocks 71 and the connecting member 92 are combined with each other (a structure that cooperates with each other). Referring to FIG. 52 has an annular main body 88 composed of a plurality of fan-shaped blocks 71, and a connecting member 92 that connects the plurality of fan-shaped blocks 71 and continues in the circumferential direction of the main body 88. . As described above, the first ring 51 has a similar structure.

  According to the cage 5 of the above embodiment, the ring 52 is configured by connecting a plurality of fan-shaped blocks 71 in a ring shape with the connecting member 92, so that the ring 52 can have any diameter. The large-diameter ring 52 can be formed simply by preparing a fan-shaped block 71 capable of forming a plurality of the rings 52. Therefore, the applicable diameter of the ring 52 can be increased.

  Further, according to the cage 5 of the above-described embodiment, no matter how large the ring 52 is, it is only necessary to form a fan-shaped block 71 that can be composed of a plurality of rings. Even if it is a diameter, processing does not become difficult and processing cost can be reduced.

  Further, according to the cage 5 of the above embodiment, each block 71 has the through hole 98 and the connecting member 92 is configured to pass through the through holes 98 of the plurality of blocks 71. 71 can be reliably connected, and the block 71 can be prevented from being detached from the main body 88 of the ring 52.

  Further, according to the cage 5 of the above embodiment, since the connecting member 92 includes a plurality of linear spring members 93, 94, 95, the annular structure of the connecting member 92 can be easily realized, The blocks 71 can be easily connected, and the connection strength of the plurality of blocks 71 can be increased.

  Further, according to the above-described embodiment, the pin type cage 5 can be applied to a large-diameter roller bearing, so that a roller bearing having a large diameter and a large rated load can be realized.

  In the cage 5 of the above embodiment, the openings 86 and 87 of the through holes 98 exist on the circumferential surface 91 facing the radially outward side of each block 71, and as shown in FIG. 92 was located on the radially outward side of the pin 53 in the ring 52. However, in the present invention, there is an opening of a through hole on the circumferential surface facing the radially inward side of each block, and the only connecting member is located on the radially inward side of the pin in the ring. Each ring has two connecting members, and one connecting member is located on the outer side in the radial direction from the pin in the ring, while the other connecting member is in the ring. It may be located on the radially inner side of the pin.

  Further, in the cage 5 of the above embodiment, each block 71 has a through hole 98, and the connecting member 92 is configured to pass through the through holes 98 of the plurality of blocks 71. However, according to the present invention, an annular groove exists in at least one of the outer peripheral surface and the inner peripheral surface of the ring in a state where the plurality of blocks constituting the ring are arranged in an annular shape, and the annular groove is elastic. The structure which inserts the O-ring-shaped connection member which has this may be sufficient.

  Further, in the cage 5 of the above embodiment, the block 71 constituting the ring 52 is connected only by the connecting member 92. However, in the present invention, a convex portion is provided on one end surface in the circumferential direction of each block, while a concave portion corresponding to the shape of the convex portion is provided on the other end surface in the circumferential direction of each block. In addition to the connection, a plurality of blocks may be connected by engaging the convex portion of each block with the concave portion of the block adjacent to the block in the circumferential direction. It can be made more robust.

  In the cage 5 of the above-described embodiment, each cell 40 that constitutes the roller assembly 7 and is connected by the connecting member 92 has only one pin 53 and the cylindrical roller 3. However, in the present invention, at least one cell of the plurality of cells constituting the roller assembly and connected by the connecting member has two or more pins and the same number of rollers as the two or more pins. You may have.

  In the cage 5 of the above embodiment, the circumferential lengths of the cells 40 constituting the ring 52 are the same. However, in the present invention, at least two cells of the plurality of cells constituting the ring are used. The circumferential lengths may be different.

  Further, in the cage 5 of the above-described embodiment, the connecting member 92 is configured by three C-shaped spring members 93, 94, and 95 that are not in phase with each other in the circumferential direction. The connecting member may be constituted by a spring member having two or four or more C-shaped elasticity whose phases in the circumferential direction of the cuts do not coincide with each other. Moreover, in this invention, like the connection member 192 of the modification shown in FIG. 7, the connection member 192 may be constituted by only one annular and elastic spring member having a portion overlapping two layers in the radial direction. good.

  Further, in the cage 5 of the above-described embodiment, in both the first ring 51 and the second ring 52, no member is present between the circumferential end surfaces of the blocks 71 adjacent in the circumferential direction. However, in the present invention, as shown in FIG. 8, that is, a schematic view showing a part of the ring of the modified example (the pin, the connecting member, the pin insertion hole of the ring, etc. are omitted), the sector-shaped blocks adjacent in the circumferential direction. The ring may have a wedge 267 sandwiched between 271, and according to this variation, the ring has a wedge 267 sandwiched between circumferentially adjacent blocks 271, so that no wedge exists. In comparison with the above, the diameter (curvature) of the ring constituted by the blocks can be changed. Further, although not shown, when a wedge is introduced, the diameter (curvature) of each ring is changed by changing the angle of the top angle of the wedge of each ring in a plurality of rings including the same block. It can be different. Therefore, the application range of the block becomes wide, and convenience and versatility can be greatly improved. The wedge can also be used for stabilization of the cage.

  When a wedge is introduced, the wedge does not have to be between all adjacent blocks. In addition, when a wedge is introduced, only the first ring has a wedge, the second ring may have no wedge, and both the first and second rings may have a wedge.

  In the above embodiment, the rolling element is the cylindrical roller 3, but in this invention, the rolling element may be a tapered roller or a convex roller (spherical roller).

  In the above embodiment, the pin type cage 5 is mainly used for a bearing that applies a radial load. However, the pin type cage of the present invention is used for a thrust roller bearing. It may be a thing.

  Further, in the present invention, the coupling structure of the pin of the pin type cage and the at least one ring may be a structure other than the coupling structure shown in the embodiment, for example, the pin of the pin type cage, The coupling structure with at least one ring may be a structure in which an annular bush exists between the outer peripheral surface of the pin and the inner peripheral surface of the through hole of at least one ring. In other words, in the present invention, the coupling structure between the pin and each ring may be any coupling structure.

DESCRIPTION OF SYMBOLS 1 Outer ring 2 Inner ring 3 Cylindrical roller 5 Cage 7 Roller assembly 31 Through hole of cylindrical roller 51 1st ring 52 2nd ring 53 Pin 61 Screw hole of 1st ring 62 Through hole of 2nd ring 70 The 1st ring is comprised Block 71 that constitutes the second ring 81 One opening of the through hole of the block that constitutes the first ring 82 The other opening of the through hole of the block that constitutes the first ring 85 Diameter of the block that constitutes the first ring Peripheral surface facing outward in the direction 86 One opening of the through hole of the block constituting the second ring 87 The other opening of the through hole of the block constituting the second ring 88 The body of the second ring 89 One end of the pin Portion 90 The other end of the pin 91 The circumferential surface 92,192 of the block constituting the second ring facing outward in the radial direction 92, 192 Connecting member 93 First spring member 94 Second It member 95 third spring member 98 through hole 267 wedge 271 blocks of the blocks constituting the through hole 99 first ring of blocks constituting the second ring

Claims (5)

A first ring having a plurality of through holes positioned at intervals in the circumferential direction;
A second ring having a plurality of through holes positioned at intervals in the circumferential direction;
A pin having one end inserted into the through hole of the first ring and the other end inserted into the through hole of the second ring, and a pin inserted into the through hole of the roller;
Each of the first ring and the second ring is
An annular body composed of a plurality of fan-shaped blocks;
A pin type retainer for connecting the plurality of fan-shaped blocks and having a connecting member continuous in the circumferential direction of the main body. In the pin type holder according to claim 1,
Each of the blocks has a through hole having two openings positioned at a distance in the circumferential direction of the main body on a circumferential surface facing the radial direction of the main body,
The pin-type retainer, wherein the connecting member penetrates through holes of the plurality of blocks. In the pin type holder according to claim 1 or 2,
The said connection member consists of a some linear spring member, The pin type holder | retainer characterized by the above-mentioned. In the pin type holder according to any one of claims 1 to 3,
The first ring has a wedge sandwiched between the blocks adjacent in the circumferential direction. A first track ring;
A second race ring,
A pin type retainer according to any one of claims 1 to 4,
A roller having an insertion hole through which the pin of the pin type retainer is inserted, held by the pin type retainer, and disposed between the first raceway ring and the second raceway ring; A roller bearing comprising:

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