JP2010174919A - Thrust roller bearing - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a thrust roller bearing having improved durability by preventing the uneven wear of rollers. <P>SOLUTION: The thrust roller bearing includes the plurality of rollers 11, and a cage 20. The cage 20 includes both annular portions 21, 22 on the inner and outer diameter sides, and a plurality of columnar portions 30. The columnar portions 30 each include a radially intermediate portion 31, both side portions 32, 33 on the radially inner and outer diameter sides, and both inclined connection portions 34, 35 on the inner and outer diameter sides. On the opposed faces of the radially intermediate portion 31 and both side portions 32, 33 on the inner and outer diameter sides opposed to each other across pockets 23, roller come-off preventing portions 36, 37, 38 are formed to prevent the come-off of the rollers 11 from the pockets 23. The roller come-off preventing portions 36, 37, 38 are set to contact rolling surfaces 12 of the rollers 11 during the rotation of the bearing. A relationship A>B is established, where A is an opposition space size between the roller come-off preventing portions 37 opposed to each other at the side portion 32 on the inner diameter side and B is an opposition space size between the roller come-off preventing portions 38 opposed to each other at the side portion 35 on the outer diameter side. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a thrust roller bearing.

2. Description of the Related Art Conventionally, for example, thrust roller bearings used for air conditioning compressors, automatic transmission torque converters, and the like are assembled between a compressor and a torque converter housing and a rotating shaft.
This type of thrust roller bearing includes a plurality of rollers and a cage.
In addition, the retainer has a plurality of pillar portions that divide and form both the inner and outer diameter side annular portions that are spaced apart from each other in the radial direction and the pockets that hold the rollers in a rollable manner. And.
Furthermore, the retainer column portion includes a radially intermediate portion, inner and outer diameter side portions in the radial direction, and inner and outer portions that connect the radially intermediate portion and the inner and outer diameter side portions, respectively. And both inclined connecting portions on the radial side.
Roller stoppers that prevent the rollers in the pocket from coming off are formed on the opposing surfaces of the radial intermediate portion and the inner and outer diameter sides facing each other across the pocket.
A thrust roller bearing having the above-described structure is disclosed in, for example, Patent Document 1.

JP 2004-21824 A

By the way, in the thrust roller bearing having the structure as described above, when the bearing rotates, there is a difference in the peripheral speed between the inner diameter side and the outer diameter side of the cage, while the rollers in the pocket of the cage are in the pocket. It moves (rolls) in the circumferential direction while vibrating within the allowable range of motion.
For this reason, the wear near the one end portion of the rolling surface of the roller corresponding to the portion where the peripheral speed on the outer diameter side of the cage is fast is more remarkable than the other portions. This may cause uneven wear of the rollers and deteriorate the bearing function.

  In view of the above problems, an object of the present invention is to provide a thrust roller bearing capable of preventing uneven wear of rollers and improving durability.

In order to solve the above problems, a thrust roller bearing according to claim 1 of the present invention is a thrust roller bearing comprising a plurality of rollers and a cage,
The retainer has a plurality of pillar portions that divide and form both inner and outer diameter side annular portions that are spaced apart from each other in the radial direction and pockets that hold the rollers in a rollable manner. And
The column part includes a radial intermediate part, both side parts on the inner / outer diameter side in the radial direction, and an inclined connection part that connects these radial direction intermediate part and both side parts on the inner / outer diameter side,
Roller stoppers that prevent the rollers in the pockets from falling off are formed on the opposing surfaces of the radial intermediate portion and the inner and outer diameter sides facing each other across the pocket,
The roller stopper is set to contact the rolling surface of the roller when the bearing rotates,
When the facing distance dimension of the roller stoppers facing the inner diameter side across the pocket is A, and the facing distance dimension of the roller stoppers facing the outer diameter side is B, A> B ”is set.

According to the said structure, the opposing space | interval dimension of the roller stopper part which opposes in the side part by the side of the internal diameter of the holder | retainer pillar part is set to A, and the opposing space | interval dimension of the roller stopper part which opposes in the side part of an outer diameter side is set to B. Sometimes, the relationship of “A> B” is set, so that the roller movement is greater between the roller stoppers on the outer diameter side than the roller stoppers on the inner diameter side. Can be regulated small.
As a result, during bearing rotation in which there is a difference in the peripheral speed between the inner diameter side and the outer diameter side of the cage, the vibration of the roller can be suppressed at a portion where the peripheral speed on the outer diameter side of the cage is fast. Uneven wear can be prevented and durability can be improved.

The thrust roller bearing according to claim 2 is a thrust roller bearing comprising a plurality of rollers and a cage,
The retainer has a plurality of pillar portions that divide and form both inner and outer diameter side annular portions that are spaced apart from each other in the radial direction and pockets that hold the rollers in a rollable manner. And
The column portion includes a radially intermediate portion, both inner and outer diameter side portions in the radial direction, and both the inner and outer diameter side portions that connect the radially intermediate portion and the inner and outer diameter side portions, respectively. An inclined connecting portion,
Roller stoppers that prevent the rollers in the pockets from falling off are formed on the opposing surfaces of the radial intermediate portion and the inner and outer diameter sides facing each other across the pocket,
The inclined connecting portion is set to contact the rolling surface of the roller during bearing rotation,
The relationship of “C> D” is established, where C is the facing distance between the two inclined connecting portions on the inner diameter side facing each other across the pocket, and D is the facing distance dimension between the two inclined connecting portions on the outer diameter side. It is set so that it may become.

According to the above configuration, when the facing interval between both inclined connecting portions on the inner diameter side facing each other across the pocket of the cage is C, and the facing interval dimension between both inclined connecting portions on the outer diameter side is D, “C> Since the relationship is set so as to satisfy the relationship “D”, the movement of the rollers can be regulated to be smaller between the two inclined connecting portions on the outer diameter side than between the two inclined connecting portions on the inner diameter side.
As a result, during bearing rotation in which there is a difference in the peripheral speed between the inner diameter side and the outer diameter side of the cage, the vibration of the roller can be suppressed at a portion where the peripheral speed on the outer diameter side of the cage is fast. Uneven wear can be prevented and durability can be improved.

It is a longitudinal cross-sectional view which shows the thrust roller bearing which concerns on Example 1 of this invention. It is a perspective view which fractures | ruptures and shows a part of cage similarly. It is a longitudinal section of a cage similarly. It is a top view which similarly shows the pocket of a holder | retainer. It is sectional drawing of the holder | retainer similarly based on the VV line | wire of FIG. It is a longitudinal cross-sectional view which shows the retainer which concerns on Example 2 of this invention. It is a top view which similarly shows the pocket of a holder | retainer. It is sectional drawing of the holder | retainer similarly based on the VIII-VIII line of FIG.

  The best mode for carrying out the present invention will be described in accordance with an embodiment.

A first embodiment of the present invention will be described with reference to FIGS.
1 is a longitudinal sectional view showing a thrust roller bearing according to Embodiment 1 of the present invention. FIG. 2 is a perspective view showing a part of the cage broken away. FIG. 3 is a longitudinal sectional view of the cage. FIG. 4 is a plan view showing a pocket of the cage. FIG. 5 is a sectional view of the cage based on the line VV in FIG.

  As shown in FIG. 1, a thrust roller bearing 10 used for an air conditioning compressor, a torque converter of an automatic transmission, and the like includes a plurality of rollers 11 and a cage 20.

As shown in FIG. 2, the retainer 20 connects the inner and outer diameter side annular portions 21 and 22 that are spaced apart from each other by a predetermined distance in the radial direction, and connects the annular portions 21 and 22 together with the plurality of rollers 11. And a plurality of column portions 30 for defining and forming pockets 23 that can be rolled.
The plurality of column portions 30 include a radial intermediate portion 31, both side portions 32, 33 on the inner and outer diameter sides in the radial direction, and these radial direction intermediate portion 31 and both side portions 32, 33 on the inner and outer diameter sides. Both inclined connecting portions 34 and 35 on the inner and outer diameter sides for connecting are provided.

  As shown in FIG. 2 to FIG. 4, in the adjacent column portions 30 facing each other with the pocket 23 of the cage 20 facing each other, the opposing surfaces of the radial intermediate portion 31 and the inner and outer diameter side portions 32 and 33. Are formed with roller stoppers 36, 37, and 38 for preventing the rollers 11 in the pocket 23 from coming off.

The thrust roller bearing 10 according to the first embodiment is configured in a race guide type in which the cage 20 contacts and slides along one of the raceway surfaces of both raceways when the bearing rotates.
And before the roller 11 accommodated in the pocket 23 of the retainer 20 comes into contact with the both inclined connecting portions 34 and 35 on the inner and outer diameter sides of both column portions 30 facing the pocket 23 during the rotation of the bearing. Further, the roller stoppers 36, 37, and 38 are set so as to contact the rolling surface 12 of the roller 11.
Further, as shown in FIG. 4 and FIG. 5, in both pillar portions 30 facing each other across the pocket 23 of the cage 20, the facing interval dimension of the roller stopper portions 37 facing the side portions 32 on the inner diameter side is A, It is set so that the relationship of “A> B” is established, where B is the facing distance between the roller stoppers 38 facing each other on the outer diameter side 33.

The thrust roller bearing according to the first embodiment is configured as described above.
Accordingly, the opposing distance dimension of the roller stoppers 37 facing the inner diameter side portions 32 of the two pillar portions 30 facing each other across the pocket 23 of the cage 20 is A, and the rollers facing the outer diameter side portions 33 are A. Since it is set so that the relationship of “A> B” is established when the facing interval dimension of the stoppers 38 is B, between the roller stoppers 38 of the outer side 33, The movement of the roller 11 can be restricted to be smaller than between the roller stoppers 37 of the side portion 32.
Thereby, at the time of bearing rotation in which a difference occurs in the peripheral speed between the inner diameter side and the outer diameter side of the cage 20, vibration of the roller 11 can be suppressed to be small at a portion where the peripheral speed on the outer diameter side of the cage 20 is fast. For this reason, it is possible to prevent uneven wear of a portion closer to one end of the roller 11 with respect to the outer diameter side of the cage 20 and improve durability.

Next, a second embodiment of the present invention will be described with reference to FIGS.
FIG. 6 is a longitudinal sectional view showing a cage according to Embodiment 2 of the present invention. FIG. 7 is a plan view showing a pocket of the cage. FIG. 8 is a sectional view of the cage based on the line VIII-VIII in FIG.
As shown in FIGS. 6-8, in this Example 2, it is comprised by the roller guide type | mold which the retainer 20 and 11 contact at the time of bearing rotation.
When the bearing rotates, the rollers 11 housed in the pockets 23 of the cage 20 have the radial intermediate portions 31 of both column portions 30 and the opposite side portions 32 and 33 on the inner and outer diameter sides facing each other with the pockets 23 therebetween. The inner and outer diameter side inclined connecting portions 34 and 35 are set so as to contact the rolling surface 12 of the roller 11 before contacting the respective roller stoppers 36, 37 and 38.
Further, as shown in FIG. 7 and FIG. 8, the facing interval between both inclined connecting portions 34 on the inner diameter side facing each other across the pocket 23 is C, and the facing interval dimension of both inclined connecting portions 35 on the outer diameter side is D. Is set so as to have a relationship of “C> D”.
Since the other structure of this Example 2 is comprised similarly to Example 1, the same code | symbol is attached | subjected with respect to the same component, and the description is abbreviate | omitted.

The thrust roller bearing according to the second embodiment is configured as described above.
Accordingly, when the facing distance between the inner diameter side inclined connecting portions 34 facing each other across the pocket 23 of the cage 20 is C and the facing distance between the outer diameter side both inclined connecting portions 35 is D, “C > D ”is set, so that the movement of the roller 11 can be restricted to be smaller between the outer diameter-side inclined connecting portions 35 than between the inner diameter-side both inclined connecting portions 34. it can.
Thereby, at the time of bearing rotation in which a difference occurs in the peripheral speed between the inner diameter side and the outer diameter side of the cage 20, vibration of the roller 11 can be suppressed to be small at a portion where the peripheral speed on the outer diameter side of the cage 20 is fast. For this reason, it is possible to prevent uneven wear of a portion closer to one end of the roller 11 with respect to the outer diameter side of the cage 20 and improve durability.

  In addition, this invention is not limited to the said Example 1, In the range which does not deviate from the summary of this invention, it can also be implemented with a various form.

DESCRIPTION OF SYMBOLS 10 Thrust roller bearing 11 Roller 20 Cage 21 Inner diameter side annular part 22 Outer diameter side annular part 23 Pocket 30 Column part 31 Radial direction intermediate part 32 Inner diameter side part 33 Outer diameter side part 34 Inner diameter side inclined connection part 35 Inclined connection on the outer diameter side 36, 37, 38 Roller stop

Claims (2)

A thrust roller bearing comprising a plurality of rollers and a cage,
The retainer has a plurality of pillar portions that divide and form both inner and outer diameter side annular portions that are spaced apart from each other in the radial direction and pockets that hold the rollers in a rollable manner. And
The column part includes a radial intermediate part, both side parts on the inner / outer diameter side in the radial direction, and an inclined connection part that connects these radial direction intermediate part and both side parts on the inner / outer diameter side,
Roller stoppers that prevent the rollers in the pockets from falling off are formed on the opposing surfaces of the radial intermediate portion and the inner and outer diameter sides facing each other across the pocket,
The roller stopper is set to contact the rolling surface of the roller when the bearing rotates,
When the facing distance dimension of the roller stoppers facing the inner diameter side across the pocket is A, and the facing distance dimension of the roller stoppers facing the outer diameter side is B, A thrust roller bearing, which is set to have a relationship of “A> B”. A thrust roller bearing comprising a plurality of rollers and a cage,
The retainer has a plurality of pillar portions that divide and form both inner and outer diameter side annular portions that are spaced apart from each other in the radial direction and pockets that hold the rollers in a rollable manner. And
The column portion includes a radially intermediate portion, both inner and outer diameter side portions in the radial direction, and both the inner and outer diameter side portions that connect the radially intermediate portion and the inner and outer diameter side portions, respectively. An inclined connecting portion,
Roller stoppers that prevent the rollers in the pockets from falling off are formed on the opposing surfaces of the radial intermediate portion and the inner and outer diameter sides facing each other across the pocket,
The inclined connecting portion is set to contact the rolling surface of the roller during bearing rotation,
The relationship of “C> D” is established, where C is the facing distance between the two inclined connecting portions on the inner diameter side facing each other across the pocket, and D is the facing distance dimension between the two inclined connecting portions on the outer diameter side. A thrust roller bearing characterized by being set to be

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