JP2007247815A - Split cage for roller bearing and split type roller bearing - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce vibration and noises resulting from the splitting of a split cage for a roller bearing and the unequal arrangement of rollers along the circumferential direction during the operation of the bearing, and to prevent the number of rollers incorporated in the split cage for the roller bearing and prevent the degradation of load capacity of the bearing with a reduction in the number of rollers. <P>SOLUTION: The cage 20 is mounted on a shaft 1 and annularly integrated around the shaft 1 with its split portions 21 joined to each other by incorporating connection rollers 13 in split pocket portions 23 formed over the split portions 21 while the split portions 21 are fitted to each other. <P>COPYRIGHT: (C)2007,JPO&amp;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, a split type rolling bearing retainer in which the split portion of the cage divided into two is connected by a connecting plate, and one and the other of the cage are integrated. Can be considered.

FIG. 8 is a side view of an essential part showing a split type rolling bearing cage disclosed in Patent Document 1, and FIG. 9 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. 8 and 9, 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 split ports 111a. , 112a, and the mating portions are coupled by the 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 screw 114 is 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. Since 115 cannot be arranged, there is a problem that it is difficult to distribute rollers (not shown) equally 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 division of roller bearing split cages and uneven distribution along the circumferential direction of the rollers, and roller bearing split cages. 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 roller bearings, wherein the split portions are joined by rollers.

  (2) A pocket portion is formed across the divided portion in the cage, and a roller is incorporated in the pocket portion in a state where the divided portion is aligned with the attachment of the cage to the shaft. The split cage for roller bearings, wherein the split portions are coupled by the above.

  (3) A split roller bearing comprising the split cage for roller bearings according to (1) or (2).

  As a material for the cage, for example, a metal such as SPCC or S25C, or a high-performance engineering plastic capable of injection molding is preferable. Specific examples of engineering plastics include polyamide resins such as polyamide 46 and polyamide 66, polyphenylene sulfide such as L-PPS, polyether ether ketone, and the like.

  Examples of the material for the roller include metals such as high carbon chromium bearing steel, and ceramics such as silicon nitride, silicon carbide, and alumina. Furthermore, as a material for the roller to which the divided portions of the cage are coupled, a material having higher strength than other rollers can be used.

  In the split type cage for roller bearing described in (1) above, the split portions are coupled by rollers. 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.

  In the roller bearing split type cage described in (2) above, the roller incorporated in the pocket portion straddling the split portion is held in a rollable manner across 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.

  In the split roller bearing described in (3), vibration and noise during the 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 side view showing a split type roller bearing to which a split type cage for roller bearings according to a first embodiment of the present invention is applied, and FIG. 2 is for a roller bearing of the split type roller bearing of FIG. It is a principal part top view which shows a split type holder | retainer.

  Referring to FIGS. 1 and 2, the split roller bearing 10 includes a plurality of rollers 11 arranged in the circumferential direction, an annular outer ring 12 having a raceway surface of each roller 11 on the inner periphery, and an inner ring of the outer ring 12. A roller bearing split type retainer 20 (hereinafter referred to as a retainer 20) that is disposed on the circumferential side and retains each roller 11 in a pocket portion 22 so as to allow rolling. The split roller bearing 10 has an outer ring 12 and a cage 20 equally divided into two in the circumferential direction by predetermined split portions 12a and 21 and is used as a bearing for supporting a shaft 1 such as a crankshaft of an automobile engine. It is done.

  The retainer 20 is assembled with the connecting rollers 13 in the divided pocket portions 23 formed across the divided portions 21 in a state where the divided portions 21 are combined with the attachment to the shaft 1. The divided portions 21 are coupled to each other and integrated around the shaft 1 in an annular shape.

  That is, the cage 20 is formed with divided pocket portions 23 across the divided portions 21, and the divided pocket portions in a state in which the divided portions 21 are fitted together with the attachment of the cage 20 to the shaft 1. The connecting roller 13 is incorporated into the unit 23. The connecting roller 13 incorporated in the divided pocket portion 23 straddling each divided portion 21 is held in a rollable manner across each divided portion 21, and the divided portions 21 are coupled to each other to retain the retainer 20. Are integrated in an annular shape around the axis 1.

  In FIG. 2, the size of the rollers 11 and 13 is shown to be smaller than the size of the pockets 22 and 23 for easy understanding of the configuration, but the rollers 11 and 13 actually contact the pockets 22 and 23. Is configured to be held. The same applies to FIG.

Hereinafter, each division part 21 of the cage 20 will be described in detail.
Each divided portion 21 of the cage 20 is formed in a crank shape in plan view (see FIG. 2), and a circumferential dividing line 21a along the circumferential direction (left-right direction in FIG. 2) and an axial direction (see FIG. 2). 2 in the vertical direction).

  The circumferential dividing line 21a is arranged at a position where the dividing pocket portion 23 is divided into two at substantially the center in the axial direction. Further, the axial dividing line 21b is adjacent to the dividing pocket part 23 in the circumferential direction from the left and right ends in FIG. 2 of the circumferential dividing line 21a to the axial both ends of the cage 20 along the axial direction. It arrange | positions so that it may pass through the approximate center between the pocket parts 22 to do.

  Rollers 13 can be incorporated into the divided pocket portion 23 from the radially outer side of the cage 20. In the divided pocket portion 23, the connecting roller 13 is incorporated from the outside in the radial direction of the cage 20 in a state where the divided portions 21 are aligned with the mounting of the cage 20 to the shaft 1. The connecting roller 13 incorporated in the divided pocket portion 23 is in a state of straddling each divided portion 21, connects the divided portions 21 to each other, and integrates the cage 20 around the shaft 1 in an annular shape.

The operation of this embodiment will be described.
In such a split roller bearing 10, the retainer 20 is assembled to the outer peripheral surface of the shaft 1 in a state where the retainer 20 is divided by each divided portion 21 and the roller 11 is incorporated in each pocket portion 22 other than the divided pocket portion 23. It is done. In the cage 20, the coupling rollers 13 are assembled into the divided pocket portion 23 from the outside in the radial direction of the cage 20 with the divided portions 21 being combined. As a result, the cage 20 has the divided portions 21 connected to each other via the connecting rollers 13 and is integrated around the shaft 1 in an annular shape.

  FIG. 3 is a plan view of an essential part showing a roller bearing split type cage according to a second embodiment of the present invention.

Referring to FIG. 3, in the roller bearing split type retainer 30, the circumferential dividing line 31a of each divided portion 31 includes three divided pocket portions 32 adjacent to each other in the circumferential direction (left and right direction in FIG. 3). Each of them is arranged at a position that is divided into two at substantially the center in the axial direction (vertical direction in FIG. 3). In addition, three coupling rollers 13 are incorporated from the outside in the radial direction of the cage 30 into the three divided pocket portions 32 that are divided into two by the circumferential dividing line 31a. With these connecting rollers 13, the retainer 30 is connected to the divided portions 31 more firmly.
Other configurations and operations are the same as those in the first embodiment.

  FIG. 4 is a plan view of an essential part showing a roller bearing split type cage according to a third embodiment of the present invention.

Referring to FIG. 4, in the roller bearing split type retainer 40, the circumferential dividing line 41 a of each divided portion 41 is inclined at a predetermined angle with respect to the circumferential direction (in FIG. 4, about 45 (Inclined diagonally to the lower right). Thereby, at the time of the assembly | attachment of the holder | retainer 40 to the axis | shaft 1 (refer FIG. 1), the catch etc. at the time of combining each division | segmentation part 41 of the holder | retainer 40 are prevented, and the assembly | attachment property of the holder | retainer 40 is improved.
Other configurations and operations are the same as those in the first embodiment.

  FIG. 5: is a principal part top view which shows the split-type cage for roller bearings which is 4th Embodiment of this invention.

  Referring to FIG. 5, in the roller bearing split type retainer 50, the split line 51 a of each split portion 51 is inclined at a predetermined angle with respect to the axial direction (in FIG. 5, about 60 ° diagonally downward to the right). In a slanted straight line.

Thereby, at the time of assembling the cage 50 to the shaft 1 (see FIG. 1), catching or the like when the divided portions 51 of the cage 50 are combined is prevented, and the assembling property of the cage 50 is improved. In addition, the number of processes when the cage 50 is cut into the split molds at the respective division parts 51 is reduced to one process.
Other configurations and operations are the same as those in the first embodiment.

  FIG. 6 is a plan view of an essential part showing a roller bearing split type cage according to a fifth embodiment of the present invention.

Referring to FIG. 6, in the roller bearing split type retainer 60, on the axial direction dividing line 61 a of each split portion 61, the plan view corresponding to the convex portion 62 and the convex portion 62 having a triangular shape in plan view, respectively. An inverted triangular concave portion 63 is provided. The convex portion 62 and the concave portion 63 are fitted to each other when the divided portions 61 of the cage 60 are combined. Thereby, the shift | offset | difference of the axial direction in each division part 61 of the holder | retainer 60 is prevented.
Other configurations and operations are the same as those in the first embodiment.

  FIG. 7 is a plan view of an essential part showing a roller bearing split type cage according to a sixth embodiment of the present invention.

Referring to FIG. 7, in the roller bearing split type retainer 70, the axial split lines 71b of the split portions 71 are adjacent to each other in the circumferential direction of the split pocket portions 72 that are split into two by the circumferential split line 71a. Each pocket portion 73 is arranged at a position where it is divided into two at substantially the center in the circumferential direction, and is arranged substantially orthogonal to the axial end surface 73a of each adjacent pocket portion 73.
Other configurations and operations are the same as those in the first embodiment.

  As described above, according to each of the above-described embodiments, the retainer 20, 30, 40, 50, 60, 70 has the divided portions 21, 31, 41, 51, 61, 71 with the attachment to the shaft 1. In the combined state, the divided rollers 21, 31, 51, 61, 71 are incorporated into the divided pocket portions 23, 32 formed over the divided portions 21, 31, 41, 51, 61, 71, thereby 41, 51, 61, 71 are coupled to each other and integrated around the shaft 1 in an annular shape.

  Therefore, vibration and noise during the bearing operation due to the division of the cages 20, 30, 40, 50, 60, and 70 can be reduced. That is, vibration generated when the divided portions 21, 31, 41, 51, 61, 71 of the roller 11 and the cages 20, 30, 40, 50, 60, 70 come into contact (collision) with the divided portion 12 a of the outer ring 12. In addition, noise and noise can be reduced, and vibration and noise generated when one and the other of the cages 20, 30, 40, 50, 60, and 70 abut each other can be reduced.

  In addition, vibration and noise during bearing operation due to uneven distribution along the circumferential direction of the rollers 11 can be reduced. That is, due to the uneven distribution along the circumferential direction of the rollers 11, the divided portions 21, 31, 41, 51, 61, 71 of the cages 20, 30, 40, 50, 60, 70 pass through the load zone. Vibration and noise caused by fluctuations in the load distribution at the time can be reduced.

  Furthermore, it is possible to prevent a decrease in the number of rollers incorporated in the cages 20, 30, 40, 50, 60, and 70, and it is possible to prevent a decrease in bearing load capacity due to a decrease in the number of rollers.

  In the above embodiment, the split roller bearing 10 which is a radial roller bearing has been described. However, the present invention is naturally applicable to a thrust roller bearing. Moreover, about the division | segmentation part shape of the holder | retainer 20, 30, 40, 50, 60, 70, if it is a shape which can combine a division | segmentation part not only with the thing of said each embodiment but using the connection roller 13, Any shape is possible.

1 is a side view showing a split roller bearing to which a roller bearing split cage according to a first embodiment of the present invention is applied. FIG. It is a principal part top view which shows the split-type cage for roller bearings of the split-type roller bearing of FIG. It is a principal part top view which shows the split type cage for roller bearings which is 2nd Embodiment of this invention. It is a principal part top view which shows the split type cage for roller bearings which is 3rd Embodiment of this invention. It is a principal part top view which shows the split type cage for roller bearings which is 4th Embodiment of this invention. It is a principal part top view which shows the split type cage for roller bearings which is 5th Embodiment of this invention. It is a principal part top view which shows the split type cage for roller bearings which is 6th 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 shaft 10 split roller bearing 11 roller 12 race (outer ring)
12a Dividing part 13 Connecting roller 20, 30, 40, 50, 60, 70 Divided cage for roller bearing 21, 31, 41, 51, 61, 71 Dividing part 21a Circumferential dividing line 21b Axial dividing line 22 Pocket part 23, 32, 72, 73 Split pocket part

Claims (3)

In the split type cage for roller bearings divided at least in the circumferential direction by the divided portion,
A split type cage for roller bearings, wherein the split portions are joined by rollers.   In the cage, a pocket portion is formed across the divided portion, and the roller is incorporated into the pocket portion in a state where the divided portion is aligned with the attachment of the cage to the shaft. The split cage for roller bearings according to claim 1, wherein the portions are coupled.   A split-type roller bearing comprising the split-type cage for roller bearings according to claim 1 or 2.

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