JP2007332997A - Split type retainer for roller bearing, and split type roller bearing - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce vibration and noise at a bearing operation time caused by the split of a split type retainer for a roller bearing and by the uneven arrangement of rollers along the circumferential direction, to prevent the reduction of the number of rollers incorporated into the split type retainer for the roller bearing, and to prevent the reduction of a bearing load capacity resulting from the reduction of the number of rollers. <P>SOLUTION: A retainer 30 for connection is incorporated in a striding state between each step 23 on the outer face side of each step 23 from the outside of a split part 22 in a state that the split part 22 is closed accompanied by the mounting of the split type retainer 20 for the roller bearing to a crank shaft 1. Hereby, the retainer 30 for connection couples the split part 22 and integrates the split type retainer 20 for the roller bearing in a circumferential direction. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention is divided into at least two parts in the circumferential direction, for example, a split type cage for roller bearings and a split type roller bearing applied to a split type roller bearing for rotatably supporting a crankshaft of an automobile engine. About.

  Conventionally, as a rolling bearing for rotatably supporting a crankshaft, a long shaft of a car engine, a roll neck for a rolling mill, etc., there are mainly two restrictions due to an assembly limitation that it is difficult to attach the shaft to the shaft. Divided type rolling bearings are used. The split rolling bearing is assembled from the outside in the radial direction with respect to the shaft.

  Here, when the outer ring and the cage are divided into two to form a split-type rolling bearing, vibration and noise during bearing operation become a problem. That is, there is a problem in that vibration and noise are generated when the roller and cage split portions come into contact (collision) with the outer ring split portion during bearing operation. In addition, there is a problem that vibration and noise are generated when one of the two cages and the other of the cages face each other.

Furthermore, in the divided portion of the cage, it is difficult to reduce the width of the column portions on both sides of the divided portion because it is necessary to ensure strength, and there is a problem that uneven distribution along the circumferential direction of the roller is caused. . In addition, due to uneven distribution along the circumferential direction of the rollers, there is a problem that vibration and noise occur due to fluctuations in the load distribution when the divided portion of the split cage passes through the load zone during bearing operation. there were.
In addition, when the cage is divided into the roller pockets, the number of rollers incorporated in the cage is reduced, resulting in a decrease in bearing load capacity.

Therefore, as disclosed in Patent Document 1, the divided parts of the cage divided into two parts are connected by a connecting plate, and a divided type rolling bearing cage in which one and the other of the cages are integrated. Conceivable.
FIG. 10 is a side view of the main part of the split type rolling bearing cage disclosed in Patent Document 1, and FIG. 11 is a cross-sectional view taken along line AA of FIG.
Japanese Utility Model Publication No. 6-73443 (pages 4-5, FIGS. 1 and 2)

That is, as shown in FIGS. 10 and 11, the split type rolling bearing retainer 100 includes a pair of retainer divided bodies 111 and 112 that are divided in a semicircular shape along the dividing line L into a split opening 111a. , 112a, and the mating portions are coupled by a coupling plate 113 so that the cage divided bodies 111, 112 are integrated into an annular shape.
The connecting plate 113 is formed in a U shape in a sectional view, and the convex portions 113a and 113b formed on both sides in the circumferential direction are fitted in the concave grooves 111c and 112c of the cage divided bodies 111 and 112, respectively. The screws 114 are connected to the step portions 111b and 112b.

  However, in the split type rolling bearing retainer 100 described in Patent Document 1 described above, the connecting plate 113 is provided across both ends of the retainer divided bodies 111 and 112, and the pocket is located at the position of the connecting plate 113. 115 cannot be arranged. For this reason, there has been a problem that it is difficult to evenly distribute the rollers (not shown) in the circumferential direction. In addition, the number of rollers incorporated in the split type rolling bearing cage 100 is reduced, resulting in a decrease in bearing load capacity.

  The present invention can reduce vibration and noise during bearing operation caused by the division of the roller bearing split cage and the uneven distribution along the circumferential direction of the roller, and the roller bearing split cage. It is an object of the present invention to provide a roller bearing split type cage and a split roller bearing capable of preventing a decrease in the number of rollers incorporated in the roller and preventing a decrease in bearing load capacity accompanying a decrease in the number of rollers.

  The above object of the present invention is achieved by the following configurations.

(1) In a split type cage for a roller bearing that is divided at least in the circumferential direction by a divided portion,
A split type cage for a roller bearing, wherein the split portion is provided with a connecting cage having a pocket portion for holding a roller, and the split portion is coupled by a connecting cage.

  In the roller bearing split type cage described in (1) above, the split portion is coupled by a connecting cage having a pocket portion for holding the roller. This reduces vibration and noise during bearing operation caused by the division of the roller bearing split cage and the uneven distribution along the circumferential direction of the roller, and is incorporated into the roller bearing split cage. It is possible to prevent a decrease in the number of rollers and a decrease in bearing load capacity accompanying a decrease in the number of rollers.

  (2) The coupling retainer is incorporated from the outside or the inside of the divided portion in a state in which the divided portions are aligned with the mounting of the roller bearing divided retainer on the shaft. The roller bearing split type cage as described in (1) above, wherein:

  In the roller bearing split type cage described in (2) above, the connecting cage incorporated from the outside or the inside of the split portion is in a state straddling the split portion, and joins the split portions. This reduces vibration and noise during bearing operation caused by the division of the roller bearing split cage and the uneven distribution along the circumferential direction of the roller, and is incorporated into the roller bearing split cage. It is possible to prevent a decrease in the number of rollers and a decrease in bearing load capacity accompanying a decrease in the number of rollers.

  (3) The roller bearing according to (2), wherein a roller is preliminarily incorporated in the pocket portion of the coupling cage before the coupling cage is incorporated into the roller bearing split type cage. Split type cage.

  In the roller bearing split type cage described in (3) above, the connecting cage that holds the roller in the pocket portion so that it can roll is incorporated from the outside or inside of the split portion, and is in a state straddling the split portion, Combine the divisions. This reduces vibration and noise during bearing operation caused by the division of the roller bearing split cage and the uneven distribution along the circumferential direction of the roller, and is incorporated into the roller bearing split cage. It is possible to prevent a decrease in the number of rollers and a decrease in bearing load capacity accompanying a decrease in the number of rollers.

  (4) A split-type roller bearing using the split-type cage for roller bearings according to any one of (1) to (3).

  In the split roller bearing described in (4) above, vibration and noise during bearing operation due to the split of the split cage for roller bearings and uneven distribution along the circumferential direction of the roller are reduced, and the roller It is possible to prevent a decrease in the number of rollers incorporated in the split cage for a bearing and a decrease in bearing load capacity accompanying a decrease in the number of rollers.

According to the divided type cage for roller bearings and the divided type roller bearing of the present invention, the bearing operation caused by vibration and noise during bearing operation caused by division of the cage and uneven distribution along the circumferential direction of the roller. It is possible to reduce vibration and noise at the time, and to prevent a decrease in the number of rollers incorporated in the split cage and a decrease in bearing load capacity due to a decrease in the number of rollers.
The roller bearing split type cage and the split roller bearing obtained by the present invention are suitably used for supporting a crankshaft of an automobile engine when low vibration, high load resistance and high durability are required.

Embodiments of the present invention will be described below with reference to the accompanying drawings.
FIG. 1 is a cross-sectional view showing a split roller bearing to which a roller bearing split type cage according to a first embodiment of the present invention is applied, and FIG. 2 is a view for a roller bearing of the split roller bearing of FIG. The principal part exploded side view which shows typically the division | segmentation part of a split-type cage, FIG. 3: is a principal part disassembled perspective view which shows the division | segmentation part of the split-type cage for roller bearings of FIG.

  Referring to FIGS. 1 to 3, the split roller bearing 10 includes an annular outer ring (orbital ring) 11 and a roller bearing split type retainer 20 that are equally divided in the circumferential direction by predetermined split portions 12 and 22. It is divided and used as a bearing for supporting a crankshaft 1 of an automobile engine.

  That is, the split type rolling bearing 10 holds a large number of rollers 13 in a pocket portion 21 of the split type cage 20 for roller bearings so that the rollers 13 can roll, and the rollers 13 roll on the raceway surface 11 a of the outer ring 11. Let Thereby, the split type rolling bearing 10 supports the crankshaft 1 rotatably on a cylinder block and a crankcase (not shown).

  The roller bearing split type retainer 20 is equally divided into two in the circumferential direction by the dividing portion 22, and as shown in FIGS. 2 and 3, both sides in the circumferential direction of the dividing portion 22 (in FIG. On both sides, thin plate-like step portions 23 are respectively formed. Each step portion 23 has two pocket portions 24 along the circumferential direction. A connecting retainer 30 is provided on the outer surface side of each stepped portion 23.

  The connecting cage 30 has pocket portions 31 that hold the rollers 13 in a rollable manner at positions corresponding to the pocket portions 24 of the step portions 23. Each of the coupling cages 30 is arranged on the outer surface side of each stepped portion 23 from the outside of the divided portion 22 in a state where the divided portions 22 are combined with the roller bearing divided cage 20 attached to the crankshaft 1. Incorporated between the step portions 23.

  The connecting retainer 30 incorporated in the dividing portion 22 is fixed with the outer peripheral surface flush with the outer peripheral surface of the dividing portion 22. In this state, the connecting retainer 30 communicates the pocket portion 31 with the pocket portion 24 of the stepped portion 23 in the radial direction and is continuous with the pocket portion 21 of the roller bearing split retainer 20 in the circumferential direction. The rollers 13 are equally spaced in the circumferential direction. Further, the connecting cage 30 couples the divided portions 22 and integrates the roller bearing divided cage 20 in the circumferential direction.

  In addition, as a specific fixing method of the retainer 30 for connection to the division | segmentation part 22, adhesion | attachment by an adhesive agent, riveting, screwing, or caulking by the plastic deformation of a nail | claw, etc. are mentioned.

  Further, the material of the connecting cage 30 is preferably a resin material excellent in shock absorption. That is, for example, a polyamide resin, a polyacetal resin, a polybutylene terephthalate resin, a fluororesin, and the like can be given. Furthermore, if it is in a high temperature environment, polyether sulfone resin, polyether imide resin, polyamide imide resin, polyimide resin, etc. are mentioned. According to these, the coupling cage 30 itself can have an impact absorbing function, and the effect of reducing vibration and noise can be obtained.

  In addition, the material of the split cage for roller bearing 20 is made of a resin material having excellent shock absorption like the material of the coupling cage 30 described above, so that further vibration and noise reduction effects can be obtained. It is done.

  FIG. 4 is an exploded perspective view of a main part showing a split portion of a roller bearing split type cage according to a second embodiment of the present invention.

Referring to FIG. 4, the roller bearing split type retainer 40 has a bent portion 43 substantially in the center in the axial direction except for the respective step portions 42 on both sides in the circumferential direction of the split portion 41, and is not shown in cross section. It is formed in an M shape.
Other configurations and operations are the same as those in the first embodiment.

  FIG. 5 is an exploded side view schematically showing an essential part of a split part of a roller bearing split type cage according to a third embodiment of the present invention, and FIG. 6 is a roller bearing split type cage of FIG. It is a principal part disassembled perspective view which shows the division part.

Referring to FIGS. 5 and 6, the connecting cage 60 of the roller bearing split type retainer 50 has a bent portion 61 at substantially the center in the axial direction, and the sectional shape of the roller bearing split type retainer 50 is shown. Is formed in a substantially M shape in cross-sectional view. Prior to being incorporated into the roller bearing split type cage 50, the coupling cage 60 has the rollers 13 incorporated in the pocket portion 61 in advance, and holds the rollers 13 in a rollable manner.
Each step portion 52 of the split portion 51 of the roller bearing split type retainer 50 is composed of a pair of rod-like members 53 substantially parallel to the axial direction, and the connecting retainer 60 is incorporated on the outer surface side. The bent portion 61 of the connecting cage 60 is positioned between the rod-shaped members 53.
Other configurations and operations are the same as those in the second embodiment.

  FIG. 7 is an exploded side view schematically showing a main part of a split part of a roller bearing split type cage according to a fourth embodiment of the present invention, and FIG. 8 is a roller bearing split type cage of FIG. It is a principal part disassembled perspective view which shows the division part.

Referring to FIGS. 7 and 8, the roller bearing split type retainer 70 is not formed with step portions on both sides in the circumferential direction of the split portion 71. In addition, the coupling retainer 80 is fixed to the outer peripheral surface of the segmented portion 71 of the roller bearing segmented retainer 70, and the segmented portion 71 is coupled to the roller bearing segmented retainer 70. Integrate in the circumferential direction.
Other configurations and operations are the same as those in the first embodiment.

  FIG. 9 is an exploded perspective view of a main part showing a split part of a roller bearing split type cage according to a fifth embodiment of the present invention.

Referring to FIG. 9, the roller bearing split type retainer 90 has a bent portion 91 at substantially the center in the axial direction, and is formed in a substantially M shape in cross section.
Other configurations and operations are the same as those in the fourth embodiment.

  As described above, according to each of the embodiments described above, the connecting cages 30, 60, and 80 are associated with the roller bearing split cages 20, 40, 50, 70, and 90 attached to the crankshaft 1. In the state where the division parts 22, 41, 51, 71, 91 are combined, they are assembled from outside the division parts 22, 41, 51, 71, 91. As a result, the connecting cages 30, 60, 80 join the divided portions 22, 41, 51, 71, 91, and the roller bearing divided cages 20, 40, 50, 70, 90 are arranged in the circumferential direction. Integrate.

Therefore, it is possible to reduce vibration and noise during the bearing operation due to the division of the roller bearing split cages 20, 40, 50, 70, 90.
That is, it occurs when the divided parts 22, 41, 51, 71, 91 of the roller 13 or roller bearing divided type retainers 20, 40, 50, 70, 90 come into contact (collision) with the divided part 11 a of the outer ring 11. Vibration and noise can be reduced, and vibration and noise generated when one and the other of the roller bearing split cages 20, 40, 50, 70, and 90 abut each other can be reduced.

  Further, it is possible to reduce vibration and noise during bearing operation due to uneven distribution along the circumferential direction of the rollers 13. That is, due to the uneven distribution along the circumferential direction of the rollers 13, the divided portions 22, 41, 51, 71, 91 of the roller bearing split cages 20, 40, 50, 70, 90 are in the load zone. Vibration and noise caused by fluctuations in load distribution when passing can be reduced.

  Furthermore, it is possible to prevent a decrease in the number of rollers incorporated in the roller bearing split cages 20, 40, 50, 70, 90 and to prevent a decrease in bearing load capacity due to a decrease in the number of rollers. .

In each of the above embodiments, in the split roller bearing of the inner ring guide, the connecting cages 30, 60, 80 are the split portions 22, 41 of the roller bearing split cages 20, 40, 50, 70, 90. , 51, 71, 91 has been described, but in the outer ring guide split roller bearing (not shown), the connecting cage is arranged inside the split portion of the roller bearing split cage. Is done. That is, the connecting cage is incorporated into the roller bearing split cage from the inside of the split portion.
In each of the above embodiments, the split roller bearing 10 that is a radial roller bearing has been described. However, the present invention is naturally applicable to a thrust roller bearing.

It is sectional drawing which shows the split-type roller bearing to which the split-type cage for roller bearings which is 1st Embodiment of this invention was applied. It is a principal part exploded side view which shows typically the division part of the split type cage for roller bearings of the split type roller bearing of FIG. It is a principal part disassembled perspective view which shows the division part of the split-type cage for roller bearings of FIG. It is a principal part disassembled perspective view which shows the division part of the split type cage for roller bearings which is 2nd Embodiment of this invention. It is a principal part exploded side view which shows typically the division part of the split type cage for roller bearings which is 3rd Embodiment of this invention. It is a principal part disassembled perspective view which shows the division part of the split type cage for roller bearings of FIG. It is a principal part exploded side view which shows typically the division part of the split type cage for roller bearings which is 4th Embodiment of this invention. It is a principal part disassembled perspective view which shows the division part of the split type cage for roller bearings of FIG. It is a principal part disassembled perspective view which shows the division part of the split type cage for roller bearings which is 5th Embodiment of this invention. It is a principal part side view which shows the holder | retainer for division | segmentation type rolling bearings currently disclosed by patent document 1. FIG. It is AA sectional drawing of FIG.

Explanation of symbols

1 Crankshaft 10 Split type roller bearing 11 Outer ring (Raceway ring)
12 Divided parts 13 Rollers 20 Divided cages for roller bearings 21 Pocket parts 22 Divided parts 23 Step parts 24 Pocket parts 30 Connecting cages 31 Pocket parts

Claims (4)

In the split type cage for roller bearings divided at least in the circumferential direction by the divided portion,
A split type cage for a roller bearing, wherein the split portion is provided with a connecting cage having a pocket portion for holding a roller, and the split portion is coupled by a connecting cage.   The coupling retainer is assembled from the outside or the inside of the divided portion in a state where the divided portions are aligned with the mounting of the divided roller bearing retainer on the shaft, thereby coupling the divided portions. The split type cage for roller bearings according to claim 1.   3. The roller bearing split type holder according to claim 2, wherein a roller is preliminarily incorporated in the pocket portion of the coupling cage before the coupling cage is incorporated into the roller bearing split type cage. vessel.   A split-type roller bearing using the split-type cage for roller bearings according to any one of claims 1 to 3.

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