JP5062045B2 - Thrust roller bearing - Google Patents

Description

  The present invention relates to a separate type thrust roller bearing that is mounted on a rotating part of an automatic transmission of an automobile and supports a thrust load.

This type of thrust roller bearing is generally formed by pressing a steel plate to form a bearing ring having a flange on the outer diameter side and a plurality of protrusions (staking) on the inner diameter side of the tip. The retainer for holding the needle roller as a moving body was used as a stopper.
Such a thrust roller bearing is mounted, for example, between a bearing receiving portion provided in a main body portion of an automatic transmission unit (hereinafter referred to as a unit) and a cover. Since the dimension between the cover and the cover is not necessarily constant, there is a problem that a gap is generated between the bearing and the cover, and an axial play occurs.

  In order to adjust such axial backlash, a raceway having a flange and a staking on the outer diameter side or inner diameter side (hereinafter referred to as an inner raceway) is arranged on the inner side, and the plate thickness is different on the outer side. Prepare multiple race rings (hereinafter referred to as selected race rings), and when assembling the unit, arrange the selected race rings corresponding to the gap between the bearing support and the cover to adjust the play. Was.

  Although the selected race is guided by the cover, there has been a problem that it cannot be guided by the cover for the convenience of unit assembly. That is, there is a problem in that the outer race cannot be guided because the selected race has no flange and staking cannot be provided.

  Therefore, a thrust roller bearing (refer to, for example, Patent Document 1) in which the inner race and the outer race are integrated is prepared by incorporating a plurality of types of outer races each having a different plate thickness into the unit. At this time, a thrust roller bearing having an outer race with a plate thickness corresponding to the gap between the bearing receiving portion and the cover is selected and assembled.

JP-A-9-189325 (2nd page, FIG. 4)

  When the three-piece integrated thrust roller bearing of Patent Document 1 is prepared by selecting and applying a plurality of types of outer race rings with different plate thicknesses, the cage is guided to either the outer diameter side race ring or the inner diameter side race ring. However, since it is necessary to prepare multiple types of thrust roller bearings with outer races or inner races with different plate thicknesses, manufacturing, inventory management, process management, etc. are extremely troublesome, which increases costs. It was.

  For this reason, a plurality of selective races with different plate thicknesses with cylindrical flanges formed on the inner diameter side or outer diameter side are provided, and the plate thickness corresponding to the clearance between the bearing receiving portion of the unit and the cover. It is also possible to arrange the selected raceway ring so that the flange of the selected raceway ring is guided to the outer diameter side or inner diameter side of the cage.

  If such a selection raceway is used, it can be stably guided to the outer diameter side or inner diameter side of the cage. However, in general, when a thrust roller bearing is incorporated in a unit, there is some play (referred to as end play, about 1.1 mm at the maximum) between the selected bearing ring and the cover. When the bearing is built into the unit, if the selected race ring moves to the cover side during use, the flange of the selected race ring cannot be made too high to supply the lubricant inside. There is a possibility that the flange of the bearing ring is detached from the cage and is not guided to the outer diameter side or the inner diameter side of the cage.

  The present invention has been made in order to solve the above-described problems, and uses a plurality of selected race rings having a cylindrical flange and different plate thicknesses, and the outer diameter of the cage is different even when the end play dimensions are different. An object of the present invention is to provide a separated type thrust roller bearing in which the side or the inner diameter side can be reliably guided.

The thrust roller bearing according to the present invention has an annular first race ring provided with a flange having a staking on the outer diameter side, and rolling elements formed at a predetermined interval in the circumferential direction of the annular portion. A cage having an accommodated pocket and incorporated in the first raceway ring, and an annular second raceway ring having a cylindrical flange on the inner diameter side and disposed outside the cage. The height of the flange of the second bearing ring is substantially equal to or higher than the total width of the bearing , and a plurality of lubricants are provided at predetermined intervals in the circumferential direction at or near the tip of the flange. The agent passage is provided .

Further, the thrust roller bearing according to the present invention includes an annular first race ring provided with a flange having a staking on the inner diameter side, and a rolling element formed at a predetermined interval in the circumferential direction of the annular portion. A retainer incorporated in the first track ring, and a second annular ring disposed outside the retainer and having a cylindrical flange on the outer diameter side. And the height of the flange of the second bearing ring is substantially equal to or higher than the total width of the bearing, and a plurality of flanges are provided at predetermined intervals in the circumferential direction at or near the tip of the flange. The lubricant passage is provided .

According to the present invention, the height of the cylindrical flange provided on the second bearing ring is formed to be substantially equal to or higher than the total width of the bearing. Even if it moves, the flange does not come off from the cage and can be reliably guided.
In addition, since the plurality of lubricant passages are provided at predetermined intervals in the circumferential direction on the flange of the second bearing ring, the rolling portion of the thrust roller bearing can be lubricated effectively and reliably.

[Embodiment 1]
FIG. 1 is a cross-sectional explanatory view of a thrust roller bearing according to Embodiment 1 of the present invention, and FIG. 2 is a bottom view of the selected race ring of FIG. Note that some parts are exaggerated for ease of explanation.
In both figures, reference numeral 1 is a thrust needle roller bearing which is a kind of thrust roller bearing, and 2 is an inner race which is an annular first race ring formed by pressing a steel plate. An upward flange 3 is provided, and a staking 4 is provided on the inner diameter side of the flange 3 over a predetermined interval or the entire circumference.

  5 is a selective raceway which is an annular second raceway formed by pressing a steel plate, and a cylindrical flange 6 facing downward in the figure is provided on the inner diameter side of the raceway. The part is provided with a plurality of notches 7 serving as a passage for a lubricant such as lubricating oil or grease at predetermined intervals. A plurality of through holes may be provided in the vicinity of the tip portion instead of the notch portion 7 (hereinafter, both are collectively referred to as a lubricant passage). A plurality of types (for example, seven types having a plate thickness of 0.8 to 2.0 mm) with different plate thickness t are prepared for the selected race ring 5, and the height h of the flange 6 is equal to the total bearing width w. It is approximately equal to or higher than this, and w ≦ h is formed.

  Reference numeral 10 denotes an annular cage made of a steel plate or a resin material. A plurality of pockets 11 are provided at predetermined intervals in the circumferential direction of the annular portion. A needle roller 12 which is a moving body is accommodated so as to be able to roll.

Next, an example of a procedure for mounting the thrust roller bearing configured as described above on the unit will be described.
First, as shown in FIG. 3, a cage 10 in which the inner race 2 and the needle rollers 12 assembled to the inner race 2 are accommodated in a pocket is mounted on a bearing receiver 16 provided in the main body 15 of the unit. Next, the selected bearing ring having a plate thickness corresponding to the gap between the peripheral surface of the needle roller 12 accommodated in the pocket 11 of the cage 10 attached to the bearing receiving portion 16 and the cover and considering the end play. 5 is positioned and assembled to the outside of the cage 10 including the needle rollers 12, and finally a cover 17 is attached to the outside of the selected raceway ring 5 as shown in FIG. The state at this time is shown in FIG.

  Thus, the thrust roller bearing 1 is sandwiched between the main body portion 15 and the cover 17, and an end play e is formed between the outer surface of the selected raceway ring 5 and the inner surface of the cover 17. Further, the outer diameter side of the cage 10 is guided by the flange 3 of the inner race ring 2, and further, the flange 6 of the selected race ring 5 is guided by the inner diameter side of the cage 10, and the outer diameter side of the cage 10 is the inner side. The staking 4 of the race 2 is prevented from coming out.

Next, the operation of the present embodiment configured as described above will be described.
Since the thrust roller bearing 1 according to the present invention is of a separated type, the selected race 5 may move toward the cover 17 corresponding to the end play e as shown in FIG. . However, since the height h of the flange 6 of the selected bearing ring 5 is substantially equal to or higher than the total bearing width w and is formed so as to satisfy w ≦ h, the flange portion 6 is disengaged from the inner diameter side of the cage 10. Without being guided to the inner diameter side of the cage 10.
Also in this case, since a part of the lubricant passage 7 provided in the flange 6 is disengaged from the retainer 10 inward (downward in the drawing), there is no hindrance to the flow of the lubricant.

  According to the present embodiment configured as described above, the height h of the flange 6 of the selected bearing ring 5 is formed to be substantially equal to or higher than the total bearing width w. Even if the selected race ring 5 moves to the cover 17 side by the end play e between the flange 6 and the retainer 10, the flange 6 does not come off the retainer 10 and is reliably guided.

Further, since the lubricant passage 7 is provided in the flange 6 of the selected raceway ring 5, the rolling portion of the thrust roller bearing 1 can be effectively and reliably lubricated.
Further, it is necessary to manufacture several types of the selected bearing rings 5 having different plate thicknesses. However, since only one type of cage 10 including the inner bearing ring 2 and the needle rollers 12 is required, a three-piece integral thrust roller bearing is required. Compared to the above, manufacturing, process management, and inventory management are easy, and costs can be reduced.

[Embodiment 2]
FIG. 7 is a longitudinal sectional view of a thrust roller bearing according to Embodiment 2 of the present invention. In addition, the same code | symbol is attached | subjected to the part of the same structure as Embodiment 1, or the same function.
In the present embodiment, a flange 3 facing upward in the figure is provided on the inner peripheral side of the inner race 2, and a staking 4 is provided on the outer peripheral side of the flange 3 over a predetermined interval or the entire periphery. ing.
Further, the selected race ring 5 is provided with a cylindrical flange 6 having a lubricant passage 7 on its outer peripheral side and facing downward in the drawing.

The installation procedure of the thrust roller bearing according to the present embodiment to the unit is substantially the same as that of the first embodiment, and the thrust roller bearing 1 is sandwiched between the main body portion 15 and the cover 17 and is a selected bearing ring. An end play e is formed between the outer surface of 5 and the cover 17. The inner diameter side of the cage 10 is guided to the flange 3 of the inner race ring 2, and the flange 6 of the selected race ring 5 is guided to the outer diameter side of the cage 10. The staking 4 of the ring 2 prevents the escape.
The operations and effects of the thrust roller bearing according to the present embodiment are substantially the same as those of the first embodiment.

It is a section explanatory view of the thrust roller bearing concerning Embodiment 1 of the present invention. FIG. 2 is a bottom view of the selected track ring in FIG. 1. It is explanatory drawing of the assembly | attachment procedure to the unit of a thrust roller bearing. It is explanatory drawing of the assembly | attachment procedure to the unit of a thrust roller bearing. It is a section explanatory view showing the state where the thrust roller bearing is mounted on the unit. FIG. 3 is an operation explanatory view of a thrust roller bearing according to Embodiment 1. It is a cross-sectional explanatory drawing of the thrust roller bearing which concerns on Embodiment 2 of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Thrust roller bearing, 2 Inner race ring (1st race ring), 3 Flange, 4 Staking, 5 Selection race ring (2nd race ring), 6 Cylindrical flange, 7 Lubricant passage, 10 Cage , 12 Needle roller (rolling element), 15 unit body, 16 bearing receiver, 17 cover, e end play.

Claims (2)

An annular first race ring provided with a flange having staking on the outer diameter side, and a pocket formed in an annular shape and containing rolling elements at a predetermined interval in the circumferential direction of the annular part, A retainer incorporated in the first bearing ring, and an annular second bearing ring having a cylindrical flange on the inner diameter side and disposed outside the retainer,
The height of the flange of the second bearing ring is formed to be substantially equal to or higher than the total bearing width, and a plurality of lubricant passages are provided at predetermined intervals in the circumferential direction at or near the tip of the flange . Thrust roller bearing characterized by that. An annular first race ring provided with a flange having a staking on the inner diameter side, and a pocket formed in an annular shape and containing rolling elements at a predetermined interval in the circumferential direction of the annular portion; A retainer incorporated in one of the race rings, and an annular second race ring having a cylindrical flange on the outer diameter side and disposed outside the retainer,
The height of the flange of the second bearing ring is formed to be substantially equal to or higher than the total bearing width, and a plurality of lubricant passages are provided at predetermined intervals in the circumferential direction at or near the tip of the flange . Thrust roller bearing characterized by that.

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