JP2011106605A - Rolling bearing and retainer thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an inexpensive rolling bearing which is easily assembled, and of which the retainer is surely brought into a split state independent of an operational status or the like to prevent fretting. <P>SOLUTION: The rolling bearing 1 utilizes the retainer 3 constituted by connecting a plurality of circular-arc members 5 having a plurality of pockets 4 each housing the rolling element 2 in a ring-like shape. The retainer 3 connects a pair of neighboring circular-arc members 5 not to be separated but to be relatively displaced in a circumferential direction by interposing the rolling element 2 therebetween. For example, an outer diameter side overlapped part 6 and an inner diameter side overlapped part 7 which are slidably and radially overlapped with each other are separately disposed at circumferential ends opposed to each other of the pair of neighboring circular-arc members 5. Openings for a pocket becoming the pocket 4 by radially overlapping the outer diameter side overlapped part with the inner diameter side overlapped part 7 are formed at the outer diameter side overlapped part 6 and the inner diameter side overlapped part, respectively. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a rolling bearing used, for example, in an idler gear portion of an automobile transmission, and a retainer thereof.

  Needle roller bearings with cages are mainly used in idler gear portions of automobile transmissions. In the idler gear part, when the synchro mechanism is engaged, the idler gear, the rotating shaft, and the bearing (mainly needle roller with cage) interposed between them are integrated and so-called synchronous rotation, so it is normally held. The relative rotation of the needle roller with a vessel does not occur. For this reason, fretting wear may occur when each roller applies a load at the same position as the inner diameter surface of the gear and the outer diameter surface of the shaft as the raceway surface and vibrates slightly. “Fretting wear” means that dents are formed on the entire circumference of the raceway surface at a roller pitch. For this reason, attempts have been made to divide the cage into two parts and generate relative rotation in the half of the cage due to the circumferential clearance of the split part to prevent fretting wear.

However, in such a bearing having two cages, there is a problem that the two cage halves must be incorporated separately. The following techniques have been proposed as means for solving this problem.
A pair of cage halves divided in two are bonded to each other at both ends in the circumferential direction with an adhesive, and the adhesive is melted due to a temperature rise during operation (Patent Document 1).
A pair of cage halves divided in half are temporarily fixed to each other at both ends in the circumferential direction with a soluble resin material having an affinity for lubricating oil (Patent Document 2).
A pair of cage halves divided in half are temporarily fixed by welding at both ends in the circumferential direction, and the temporary fixing portions are destroyed by stress during operation (Patent Document 3).
A pair of cage halves divided in two are connected in a state of being shifted in the axial direction, and are pressed during assembly to eliminate the shift (Patent Document 4).

Japanese Utility Model Publication No. 5-19652 Japanese Utility Model Publication No. 5-89995 JP-A-7-127645 JP 2009-85001 A

  In these prior arts, a part of the circumferential direction of the ring-shaped cage is divided by the operating temperature and lubricating oil. Therefore, for example, when the operating temperature is low or when the lubricating oil is not sufficiently supplied, the cage may not be divided. In addition, when the connecting portion or the like is divided by destruction, fragments are generated at the time of destruction. A bearing or the like bites into the broken piece, causing vibrations, damage to the bearing, and a malfunction in the transmission function.

  An object of the present invention is to provide a rolling bearing that is inexpensive, easy to assemble, and that can reliably prevent fretting by reliably dividing the cage without depending on operating conditions, and the cage. .

  The rolling bearing of this invention uses a cage formed by connecting a plurality of arc-shaped members each having a plurality of pockets for accommodating rolling elements in a ring shape, and a pair of adjacent arc-shaped members are By connecting the rolling elements between each other, the rolling elements are connected in a non-separable and circumferentially displaceable manner. The rolling element may be a roller, for example. In that case, a rolling bearing is good also as a roller with a holder | retainer which consists of the said rolling element and the said holder | retainer.

  This rolling bearing is incorporated in an idler gear portion of a transmission in the state of a rolling element with a cage, for example. When the synchro mechanism is engaged, the idler gear, the rotating shaft, and the rolling element with a cage interposed therebetween are integrally rotated synchronously. The pair of adjacent arc-shaped members of the cage are connected to each other so as to be capable of relative displacement in the circumferential direction, so that each arc-shaped member is reliably maintained in a divided state regardless of the operating conditions during synchronous rotation. The Thereby, the contact position of the rolling element with respect to the idler gear and the rotating shaft always changes, and the occurrence of fretting wear on the inner diameter surface of the idler gear and the outer diameter surface of the rotating shaft is suppressed.

  A pair of adjacent arc-shaped members can be connected without using another member by interposing a rolling element between them. Therefore, it is possible to simplify the bearing structure and reduce the manufacturing cost. When assembling, the outer-diameter side overlapping portion and the inner-diameter-side overlapping portion of a pair of adjacent arc-shaped members are overlapped in the radial direction to assemble the arc-shaped members in a ring shape, and the rolling elements are stored in the pockets. Since both the arc-shaped members are connected to each other in a circumferential direction by the rolling elements housed in the pockets constituted by the openings for the pockets of a pair of adjacent arc-shaped members, the cage has a plurality of It can be handled as a single part formed by connecting arc-shaped members in a ring shape. Therefore, the assembly work of the rolling bearing and the assembly work of the rolling bearing into the machine are easy.

Specifically, the retainer includes an outer diameter side overlapping portion and an inner diameter side overlapping portion that are slidably overlapped with each other at circumferential ends of a pair of adjacent arcuate members facing each other in a slidable manner. Are provided separately, and the outer diameter side overlapping portion and the inner diameter side overlapping portion are respectively provided with pocket openings serving as the pockets by overlapping each other in the radial direction. By overlapping the overlapping portions in the radial direction and storing the rolling elements in the pockets formed by the pocket openings in the overlapping portions, the two arc-shaped members are separated from each other in the circumferential direction. It is good also as a structure connected so that relative displacement was possible.
In that case, the outer diameter side overlapping portion has a stepped shape in which an inner diameter side portion at a circumferential end of the arcuate member is cut out, and the inner diameter side overlapping portion is a circumference of the arcuate member. It may be a stepped shape in which the outer diameter side portion at the end in the direction is cut out.

According to this configuration, the cage is provided with the outer diameter side overlapping portion and the inner diameter side overlapping portion separately at the circumferential ends of a pair of adjacent arcuate members that are opposed to each other, and these outer diameter side overlapping portions are provided. And it is a simple structure which provided the opening for pockets in the inner diameter side overlap part. Therefore, it is possible to simplify the bearing structure and reduce the manufacturing cost. When the outer diameter side overlapped portion and the inner diameter side overlapped portion are stepped, the outer diameter side overlapped portion and the inner diameter side overlapped portion can be easily processed by scraping or press molding, thereby further reducing the manufacturing cost. Can be reduced.
The cage having this configuration stores the rolling elements in the pocket formed by the pocket opening of the outer diameter side overlapping portion and the inner diameter side overlapping portion, thereby separating both arc-shaped members from each other in the circumferential direction. Connect to allow relative displacement. For this reason, it is not necessary to specially connect the respective arc-shaped members, and the number of steps for assembling the cage can be reduced.

The arcuate member may have the outer diameter side overlapping portion at one end in the circumferential direction and the inner diameter side overlapping portion at the other end.
In this way, if the outer diameter side overlapping portion and the inner diameter side overlapping portion are separately provided at both ends in the circumferential direction of the arc-shaped member, each arc-shaped member constituting the cage can have the same shape, The number of parts can be reduced.

  In addition, the cage is slidably overlapped with circumferential ends of a pair of adjacent arc-shaped members facing each other so as to sandwich the center overlap portion and the center overlap portion from both sides in the radial direction. A pair of both-side overlap portions are provided separately, and pocket openings serving as the pockets are respectively provided by overlapping these center overlap portions and both-side overlap portions in the radial direction. By superimposing the overlapping parts, both the arc-shaped members are connected in a non-separable manner in the radial direction, and the rolling elements are stored in the common pocket formed by the central overlapping part and the opening for the double-sided overlapping part. By doing so, it is good also as a structure which connected both the circular-arc-shaped members so that it was non-separable and relative-displaceable with respect to the circumferential direction.

According to this configuration, the cage is provided with the central overlap portion and the pair of double-side overlap portions separately at the circumferential ends of the pair of adjacent arc-shaped members that are adjacent to each other, It has a simple structure in which pocket openings are provided in the overlapping portions on both sides. Therefore, it is possible to simplify the bearing structure and reduce the manufacturing cost.
The cage of this configuration is capable of non-separating and relatively displacing both arcuate members in the circumferential direction by storing the rolling elements in a pocket composed of a pocket opening in the center overlapping part and both side overlapping parts. Connect to For this reason, it is not necessary to specially connect the respective arc-shaped members, and the number of steps for assembling the cage can be reduced. Moreover, in the connection part of a pair of adjacent arc-shaped members, since a pair of both-sides overlapped part has pinched | interposed the center overlapping part, it can prevent reliably that both arc-shaped members isolate | separate to radial direction. Can do. For this reason, it is easier to incorporate the rolling bearing.

In the present invention, the arcuate member may be formed by bending a plate material.
According to this molding method, for example, it is possible to manufacture a ring-shaped member at a lower cost than when processing at least part of the circumferential direction into an arc-shaped member by cutting or the like.

  As described above, this rolling bearing is inexpensive, easy to assemble, and can support the idler gear of an automobile transmission because it can prevent fretting by reliably dividing the cage without depending on operating conditions. It is suitable for a bearing to be used.

  The cage of the present invention is formed by connecting a plurality of arc-shaped members each having a plurality of pockets for storing rolling elements in a ring shape, and the adjacent arc-shaped members are interposed between the rolling elements. By this, it is connected in a non-separable and circumferentially displaceable manner with respect to the circumferential direction.

  According to this structure, a pair of adjacent arc-shaped members can be connected without using another member by interposing a rolling element between each other. Therefore, the structure of the cage can be simplified and the manufacturing cost can be reduced. When assembling, the outer diameter side overlapping portion and the inner diameter side overlapping portion of a pair of adjacent arc-shaped members are overlapped in the radial direction to assemble each arc-shaped member into a ring shape, and each pocket of a pair of adjacent arc-shaped members The rolling element is stored in a pocket made up of openings for use. Since both the arc-shaped members are connected to each other in a circumferential direction by the rolling elements, the cage can be handled as one part formed by connecting a plurality of arc-shaped members in a ring shape. Therefore, the assembling work of the bearing and the assembling work of the bearing into the machine are easy.

The rolling bearing is used in the transmission of the present invention.
The rolling bearing is inexpensive, easy to assemble, and can reliably prevent the fretting by keeping the cage in a divided state without depending on the operating conditions and the like. Therefore, the rolling bearing can be a preferable transmission from various fields.

  The rolling bearing of this invention uses a cage formed by connecting a plurality of arc-shaped members each having a plurality of pockets for accommodating rolling elements in a ring shape, and a pair of adjacent arc-shaped members are By interposing the rolling elements between each other, it is connected in a non-separable and relative displaceable manner with respect to the circumferential direction, so that it is inexpensive, easy to assemble, and the cage can be reliably secured without depending on operating conditions, etc. It is possible to prevent fretting by dividing it.

  The cage of the present invention is formed by connecting a plurality of arc-shaped members each having a plurality of pockets for storing rolling elements in a ring shape, and the adjacent arc-shaped members are interposed between the rolling elements. Thus, since they are connected so as to be non-separable and relatively displaceable with respect to the circumferential direction, they are inexpensive, easy to assemble, and can be reliably divided into pieces without depending on operating conditions and the like to prevent fretting.

(A) is the front view which represented the upper half of the rolling bearing concerning 1st Embodiment of this invention in the cross section, (B) is the IB-IB sectional drawing. It is the elements on larger scale of FIG. It is a perspective view of the holder | retainer of the rolling bearing. (A) is the front view which represented the upper half of the rolling bearing concerning 2nd Embodiment of this invention in the cross section, (B) is the IVB-IVB sectional drawing. FIG. 5 is a partially enlarged view of FIG. It is a perspective view of the holder | retainer of the rolling bearing. It is sectional drawing which shows a part of transmission for motor vehicles using one of the said rolling bearings. It is sectional drawing of the modification of 1st Embodiment. It is sectional drawing of the modification of 2nd Embodiment.

  A first embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1, the rolling bearing 1 is a roller with a cage, and includes a plurality of rollers 2 as rolling elements and a cage 3 that holds each roller 2. Each roller 2 is stored in a plurality of rolling element storage pockets 4 formed in a cage 3 in a circumferential direction. The roller 2 is formed of a steel material such as bearing steel. The cage 3 is made of steel in this example, but may be made of resin.

  The cage 3 (FIG. 3) is formed by connecting a plurality of (in this example, two) arcuate members 5 each having a plurality of pockets 4 in a ring shape. Each arcuate member 5 has the same shape and is formed by bending a metal plate. Each arcuate member 5 includes an arc portion 5a at both ends in the axial direction and a plurality of column portions 5b provided at a plurality of locations in the circumferential direction between the arc portions 5a at both ends. The pocket 4 is formed between a pair of adjacent pillars 5b.

  At one end in the circumferential direction of the arc-shaped member 5, a step-shaped outer diameter side overlapping portion 6 in which the inner diameter side portion is cut out is provided, and the outer diameter side portion is provided at the other end portion. A notched stepped inner diameter side overlapping portion 7 is provided. The outer diameter side overlapping portion 6 and the inner diameter side overlapping portion 7 are respectively provided with pocket openings 4A and 4B that become the pocket 4 in a state where the overlapping portions 6 and 7 are overlapped in the radial direction.

  2, the outer diameter edge of the pocket opening 4A of the outer diameter side overlapping portion 6 and the inner diameter edge of the pocket opening 4B of the inner diameter side overlapping portion 7 project inward in the circumferential direction. Each of the stoppers 8 is provided. These stoppers 8 prevent the rollers 2 in the pocket 4 from falling off to the outer diameter side and the inner diameter side. The distance a between the pair of retaining stoppers 8 facing each other in the circumferential direction is slightly narrower than the diameter D of the roller 2, and the roller 2 is fitted into the pocket 4 using the elastic deformation of the retaining stopper 8. In the example shown in the figure, the stoppers 8 are provided only in the pockets 4 constituted by the pocket openings 4A and 4B. However, similar stoppers 8 may be provided in the other pockets 4.

  The rolling bearing 1 includes a pair of adjacent arcuate members 5 that are radially overlapped with an outer diameter side overlapping portion 6 and an inner diameter side overlapping portion 7 so that the arcuate members 5 are assembled in a ring shape. By storing the roller 2, it is assembled into a roller with a cage. In this assembled state, the pair of adjacent arc-shaped members 5 are connected to each other in the circumferential direction in a non-separable manner by the rollers 2 housed in the pocket 4 constituted by the pocket openings 4A and 4B. Since the outer diameter side overlapping portion 6 and the inner diameter side overlapping portion 7 are slidable with respect to each other, a pair of adjacent arc-shaped members 5 have a circumferential width b (see FIG. 2) of the pocket 4 and a diameter D of two. Within the difference range, they can be displaced relative to each other in the circumferential direction. That is, a pair of adjacent arc-shaped members 5 are connected so as to be non-separable and relatively displaceable in the circumferential direction by interposing the rollers 2 between them.

  In this manner, each arc-shaped member 5 is provided with the outer diameter side overlapping portion 6 and the inner diameter side overlapping portion 7 separately at both ends in the circumferential direction, and the outer diameter side overlapping portion 6 and the inner diameter side overlapping portion 7 are pocketed. This is a simple structure in which the openings 4A and 4B are provided. The outer diameter side overlapping portion 6 and the inner diameter side overlapping portion 7 have a stepped shape, and can be easily processed by shaving or press molding. Moreover, a pair of adjacent circular-arc-shaped members 5 can be connected without using another member by interposing the roller 2 between them. Therefore, it is possible to simplify the bearing structure and reduce the manufacturing cost. Furthermore, by providing the outer diameter side overlapping portion 6 and the inner diameter side overlapping portion 7 separately at both ends in the circumferential direction of the arc-shaped member 5, the respective arc-shaped members 5 constituting the cage 3 have the same shape. be able to. Thereby, the kind of components can be reduced.

  A rolling bearing 1 that is a roller with a cage is used as a bearing that supports an idler gear of an automobile transmission, for example, as shown in FIG. In this figure, the transmission 20 has a rolling bearing 1 incorporated between an inner diameter surface of an idler gear 21 and an outer diameter surface of a rotary shaft 22. Since the respective arc-shaped members 5 of the cage 3 are connected in a non-separable manner in the circumferential direction, the cage 3 can be handled as a single component formed by connecting a plurality of arc-shaped members 5 in a ring shape. Assembling work of the rolling bearing 1 is easy.

  In the transmission 20, when the synchro mechanism is engaged, the idler gear 21, the rotating shaft 22, and the rolling bearing 1 are integrally rotated synchronously. Even when a pair of adjacent arcuate members 5 are connected to each other, each arcuate member 5 can be relatively displaced in the circumferential direction. For this reason, each arcuate member 5 is reliably maintained in the divided state regardless of the operating conditions during synchronous rotation. Thereby, the contact position of the roller 2 which is a rolling element with respect to the idler gear 21 and the rotating shaft 22 is constantly changed, and the occurrence of fretting wear on the inner diameter surface of the idler gear 21 and the outer diameter surface of the rotating shaft 22 is suppressed.

  4 to 6 show a second embodiment of the present invention. This rolling bearing 1 is also a roller with a cage, and the configuration other than the cage 3 is the same as that of the above embodiment. Parts having the same configurations as those of the embodiment are denoted by the same reference numerals, and description thereof is omitted.

  The cage 3 (FIG. 6) of the rolling bearing 1 is also the same as that of the above embodiment in that a plurality (two in this example) of arcuate members 5 each having a plurality of pockets 4 are connected in a ring shape. . A difference from the above embodiment is that a central overlap portion 11 formed by cutting out the outer diameter side portion and the inner diameter side portion into a step shape is provided at one end in the circumferential direction of the arc-shaped member 5, The other end portion is provided with a pair of double-sided overlapping portions 12 formed by cutting out the central portion in the radial direction into a groove shape. The center overlap portion 11 and the pair of both side overlap portions 12 are for pockets that become the pockets 4 in a state where the overlap portions 11 and 12 are overlapped in the radial direction so as to sandwich the center overlap portion 11 between the both side overlap portions 12. Openings 4C and 4D are provided, respectively.

  In this rolling bearing 1, each of the arcuate members 5 is assembled in a ring shape by superimposing the center overlapping part 11 and the both side overlapping parts 12 of the pair of adjacent arcuate members 5 in the radial direction as described above. By assembling the rollers 2, the rollers are assembled into rollers. In this assembled state, as in the previous embodiment, the pair of adjacent arc-shaped members 5 are not separated from each other in the circumferential direction by the rollers 2 housed in the pockets 4 constituted by the pocket openings 4C and 4D. Connected. Since the center overlapping portion 11 and the both side overlapping portions 12 are slidable with respect to each other, a pair of adjacent arc-shaped members 5 are located within the range of the diameter D of the circumferential width b of the pocket 4 and the diameter D of the pockets 4. Relative displacement is possible with respect to the circumferential direction. That is, a pair of adjacent arc-shaped members 5 are connected so as to be non-separable and relatively displaceable in the circumferential direction by interposing the rollers 2 between them.

  Further, in the case of the second embodiment, since the pair of both side overlapping portions 12 sandwich the center overlapping portion 11 in the connecting portion between a pair of adjacent arc-shaped members 5, both arc-shaped members are Separation in the radial direction can be reliably prevented. Therefore, the assembly work of the rolling bearing 1 is further facilitated.

  Although the rolling bearing 1 of each of the above embodiments is a roller with cage, the bearing type may be provided with an outer ring 23 and an inner ring 24 as shown in FIGS. FIG. 8 shows a modification of the first embodiment, and FIG. 9 shows a modification of the second embodiment.

DESCRIPTION OF SYMBOLS 1 ... Rolling bearing 2 ... Roller (rolling element)
DESCRIPTION OF SYMBOLS 3 ... Cage 4 ... Pocket 4A, 4B, 4C, 4D ... Pocket opening 5 ... Arc-shaped member 6 ... Outer diameter side overlapping part 7 ... Inner diameter side overlapping part 11 ... Central overlapping part 12 ... Both side overlapping part 20 ... Transmission

Claims (11)

In a rolling bearing using a cage formed by connecting a plurality of arc-shaped members each having a plurality of pockets for storing rolling elements in a ring shape,
A rolling bearing characterized in that a pair of adjacent arc-shaped members are connected so as to be non-separable and relatively displaceable in the circumferential direction by interposing the rolling elements between each other.   The rolling bearing according to claim 1, wherein the rolling element is a roller.   The rolling bearing according to claim 2, wherein the roller bearing is a roller with a cage including the rolling element and the cage. 4. The outer holder according to claim 1, wherein the cage is radially slidably overlapped with each other at opposite circumferential ends of a pair of adjacent arcuate members. Each of the radial side overlapping portion and the inner diameter side overlapping portion is provided separately, and the outer diameter side overlapping portion and the inner diameter side overlapping portion are each provided with a pocket opening that becomes the pocket by overlapping each other in the radial direction.
The outer diameter side overlapping portion and the inner diameter side overlapping portion are overlapped with each other in the radial direction, and the rolling elements are housed in a pocket formed by the pocket opening of the both overlapping portions, whereby the two arcuate members are connected to each other. Rolling bearings connected so as to be non-separable and relatively displaceable in the circumferential direction.   5. The outer diameter side overlapping portion according to claim 4, wherein the outer diameter side overlapping portion has a stepped shape in which an inner diameter side portion at a circumferential end of the arcuate member is cut out, and the inner diameter side overlapping portion is formed of the arc-shaped member. A rolling bearing having a stepped shape in which an outer diameter side portion at an end portion in a circumferential direction is notched.   6. The rolling bearing according to claim 4 or 5, wherein the arc-shaped member has the outer diameter side overlapping portion at one end in a circumferential direction and the inner diameter side overlapping portion at the other end. In any 1 item | term of the Claims 1 thru | or 3, The said holder | retainer has a center overlap part and this center overlap part in radial direction at the edge part of the circumferential direction which a pair of adjacent circular arc member mutually opposes. A pair of double-sided overlapping portions that are slidably overlapped so as to be sandwiched from both sides are provided separately, and the pocket opening serving as the pocket is formed by overlapping the central overlapping portion and the double-sided overlapping portions in the radial direction. Provided,
By overlapping the center overlap portion and the side overlap portion, both the arc-shaped members are connected in a non-separable manner in the radial direction, and the common overlap portion formed by the pocket opening of the center overlap portion and the side overlap portion is formed. A rolling bearing in which rolling elements are housed in a pocket so that both arc-shaped members are connected to each other so as to be non-separable and relatively displaceable in the circumferential direction.   8. The rolling bearing according to claim 1, wherein the arcuate member is formed by bending a plate material.   9. The rolling bearing according to claim 1, wherein the rolling bearing is a bearing that supports an idler gear of an automobile transmission. In a cage formed by connecting a plurality of arc-shaped members each having a plurality of pockets for storing rolling elements in a ring shape,
A cage in which adjacent arc-shaped members are connected in a non-separable and relative displaceable manner in the circumferential direction by interposing the rolling elements between each other.   A transmission using the rolling bearing according to any one of claims 1 to 9.

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