JP2014222072A - Rolling bearing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rolling bearing device that can prevent a retainer from coming into contact with a seal member due to skew force of a roller during rolling of a bearing.SOLUTION: A rolling bearing device includes: an inner ring member 10; an outer ring member 30; a plurality of rollers 42; a retainer 43 for retaining the rollers 42; and a seal member 51 disposed adjacent to the retainer 43 and sealing an opening part of annular space. In the rolling bearing device, an engaging structure 60 for preventing the retainer 43 from coming into contact with the seal member 51 by controlling the movement of the retainer 43 to a side of the seal member 51 with the skew force of the rollers 42 during rolling of the bearing is provided between the retainer 43 and a raceway ring member of at least one of the inner ring member 10 and the outer ring member 30.

Description

  The present invention relates to a rolling bearing device.

In a rolling bearing device, for example, as disclosed in Patent Document 1, an inner ring member, an outer ring member disposed on the same center line with an annular space on the outer periphery of the inner ring member, and a cage in the annular space And a plurality of rollers disposed so as to be able to roll while being held by the roller, and a seal member disposed adjacent to the retainer in the vicinity of the opening of the annular space and sealing the opening of the annular space. Structures are known.
Further, in the rolling bearing, as disclosed in, for example, Patent Document 1, a flange is formed at the end of the outer ring toward the inner side in the radial direction, and this flange engages with a circumferential groove of the cage. Rolling bearings are known.

JP-A-11-153096 JP-A-2-229912

By the way, in the rolling bearing device in which the seal member is disposed adjacent to the retainer near the opening of the annular space between the inner and outer ring members, the retainer together with the roller is caused by the skewing force of the roller during the bearing rotation. The cage may move toward the seal member and the cage may come into contact with the seal member.
If a large skewing force is generated on the roller, it is assumed that the contact pressure of the cage with respect to the seal member increases, and the contact portion between the seal member and the cage becomes significantly worn.

  In view of the above problems, an object of the present invention is to provide a rolling bearing device capable of avoiding contact of a cage with a seal member due to a roller skew force during bearing rotation.

In order to solve the above problems, a rolling bearing device according to a first aspect of the present invention includes an inner ring member, an outer ring member disposed on the same center line with an annular space on the outer periphery of the inner ring member, A plurality of rollers disposed so as to be able to roll in a state of being held by a cage in an annular space, and disposed adjacent to the cage in the vicinity of the opening of the annular space and having an opening in the annular space A rolling bearing device having a sealing member for sealing,
Between the inner ring member and the outer ring member, between the at least one race ring member and the cage, the cage is moved to the seal member side by the skew force of the roller during bearing rotation. A locking structure that restricts and avoids contact of the cage with the seal member is provided.

According to the first invention, when the bearing is rotating, a skewing force is generated in the roller, and when the cage moves together with the roller to the seal member side, the locking provided between the bearing ring member and the cage is provided. The structure restricts movement of the cage toward the seal member.
Thereby, the contact of the cage with the seal member can be avoided. For this reason, wear due to contact between the seal member and the cage can be suppressed, and durability can be improved.

  The rolling bearing device according to a second aspect of the present invention is the rolling bearing device according to the first aspect, wherein the locking structure is formed on the groove formed on the inner peripheral surface of the outer ring member and on the outer peripheral surface of the cage. And a locking portion that is formed and engages with the groove.

  According to the second invention, the locking structure can be easily configured by forming the groove portion on the inner peripheral surface of the outer ring member and forming the locking portion engaging with the groove portion on the outer peripheral surface of the cage. .

  A rolling bearing device according to a third aspect of the present invention is the rolling bearing device according to the second aspect of the present invention, wherein an axial clearance between the one side wall surface of the groove portion of the inner peripheral surface of the outer ring member and the locking portion is provided. A is set so that the relation of “A <B” is established, where A is B and the axial clearance between the seal member and the cage is B.

  According to the third invention, the axial gap between the one side wall surface of the groove portion on the inner peripheral surface of the outer ring member and the locking portion is A, and the axial gap between the seal member and the cage is B. In this case, the contact between the seal member and the cage can be favorably avoided by setting the relationship of “A <B”.

A rolling bearing device according to a fourth invention of the present invention is the rolling bearing device of the second invention or the third invention, wherein the locking portion is formed annularly in the circumferential direction of the outer peripheral surface of the annular portion of the cage. And
A plurality of slit-shaped split grooves are formed at predetermined intervals in the circumferential direction in the annular portion and the locking portion of the cage.

  According to the fourth aspect of the present invention, the cage can be elastically contracted and deformed with a small force by a plurality of slit-shaped split grooves formed in the annular portion and the locking portion of the cage. For this reason, the cage can be easily assembled in the annular space between the inner ring member and the outer ring member.

  A rolling bearing device according to a fifth aspect of the present invention is the rolling bearing device according to the first aspect, wherein the locking structure is formed on the outer peripheral surface of the inner ring member so as to be engageable with the end surface on the seal member side of the roller. It is characterized by comprising a locking portion.

According to the fifth invention, the locking structure can be easily configured by forming the locking portion that can be engaged with the end surface on the seal member side of the roller on the outer peripheral surface of the inner ring member.

  A rolling bearing device according to a sixth aspect of the present invention is the rolling bearing device according to the fifth aspect, wherein the axial clearance between the end surface of the roller on the seal member side and the locking portion is C, It is characterized in that the relation of “C <D” is established, where D is the axial clearance between the seal member and the cage.

  According to the sixth invention, when the axial gap between the end surface of the roller on the seal member side and the locking portion is C and the axial gap between the seal member and the cage is D, “ By setting the relationship C <D, the contact between the seal member and the cage can be favorably avoided.

  According to this invention, since the contact of the cage with the seal member can be avoided, wear due to the contact between the seal member and the cage can be suppressed, and the durability can be improved.

It is an axial cross section which shows the water pump by which the rolling bearing apparatus which concerns on Example 1 of this invention was employ | adopted. It is an axial cross section which similarly shows a rolling bearing device in an enlarged manner. It is a perspective view which similarly shows a holder | retainer. It is a perspective view which shows the embodiment which similarly formed the split groove in some cages. It is an axial cross section which shows the rolling bearing apparatus which concerns on Example 2 of this invention. It is an axial cross section which shows the rolling bearing apparatus which concerns on Example 3 of this invention. It is an axial cross section which shows the rolling bearing apparatus which concerns on Example 4 of this invention.

  A mode for carrying out the present invention will be described according to an embodiment.

A first embodiment of the present invention will be described with reference to FIGS.
As shown in FIG. 1, the rolling bearing device according to the first embodiment is exemplified for a water pump.
The rolling bearing device employed in the water pump includes an inner ring member 10 constituting a pump shaft, an outer ring member 30 disposed on the same center line with an annular space on the outer periphery of the inner ring member 10, an inner ring member 10, A plurality of balls 40 that are arranged in a double row in the annular space between the outer ring member 30 and constitute a ball bearing, a plurality of rollers 42 that constitute a roller bearing, and both end openings of the annular space are sealed. Sealing members 50 and 51 are provided.

That is, the inner ring member 10 constituting the pump shaft is integrally extended from the end portion of the main shaft portion 11a with a main shaft portion 11a in which a double row ball bearing and a bearing are disposed, And an impeller shaft portion 11b formed with a smaller diameter than the main shaft portion 11a. A pulley 20 is fitted to the outer peripheral surface of the front end portion of the main shaft portion 11a so that torque can be transmitted, and an impeller 22 having a plurality of blades 23 is provided on the outer peripheral surface of the front end portion of the impeller shaft portion 11b. It is fixed by press-fitting or the like.
In addition, an inner ring raceway surface 12 corresponding to a ball bearing and an inner ring raceway surface 13 corresponding to a roller bearing are formed on the outer peripheral surface of the main shaft portion 11a at predetermined intervals in the axial direction.

The outer ring member 30 is formed in a cylindrical shape, and is fixed to the bearing assembly hole 2 of the housing 1 by press fitting or the like on the outer peripheral surface thereof.
As shown in FIG. 2, an outer ring raceway surface 32 corresponding to a ball bearing and an outer ring raceway surface 33 corresponding to a roller bearing are formed on the inner peripheral surface of the outer ring member 30 at a predetermined interval in the axial direction. Yes.
An annular groove 36 for mounting the seal member 51 is formed in the vicinity of the opening on the roller bearing side of the inner peripheral surface of the outer ring member 30.
A plurality of balls 40 are arranged between the inner ring raceway surface 12 and the outer ring raceway surface 32 corresponding to the ball bearings so as to be able to roll while being held by a cage 41. Further, between the inner ring raceway surface 13 and the outer ring raceway surface 33 corresponding to the roller bearing, a plurality of rollers (cylindrical rollers, needle rollers) 42 are rolled in a state of being held in the respective pockets 47 of the cage 41. It is arranged to be possible.

The roller bearing cage 43 is formed of a resin material having heat resistance and wear resistance.
As shown in FIGS. 2 and 3, the retainer 43 connects both the annular portions 44, 45 spaced apart from each other in the axial direction, and connects the both annular portions 44, 45, and holds the rollers 42 in the circumferential direction. A plurality of pillar portions 46 disposed with a pocket 47 therebetween are integrally provided.

In the vicinity of the opening on the roller bearing side of the annular space between the inner ring member 10 and the outer ring member 30, a seal member 51 for sealing the opening is disposed adjacent to the annular portion 45 of the cage 43.
As shown in FIG. 2, the seal member 51 has a cored bar 52 and a lip 57. The cored bar 52 is formed by pressing a metal plate. The core metal 52 includes an outer diameter side annular portion 53 that is fixed to the annular groove 36 of the outer ring member 30, and a stepped cylinder that protrudes in a cylindrical shape from the inner diameter end of the outer diameter side annular portion 53 toward the bearing outer side. The portion 54 and an inner diameter side annular portion 55 formed radially inward from the tip of the stepped cylindrical portion 54 are integrally provided.
The outer surface of the bearing of the core metal 52 is covered with an elastic layer 56 such as rubber, and the inner diameter end portion of the inner diameter side annular portion 55 is integrally formed of the same material as the elastic layer 56 and is the main shaft of the inner ring member 10. An elastically deformable bifurcated seal lip 57 slidably contacting the outer peripheral surface of the portion 11a is formed.

Between the inner ring member 10 and the outer ring member 30, at least one of the bearing ring members and the roller bearing retainer 43, a retainer on the seal member 51 side by the skewing force of the roller 42 when the bearing rotates. A locking structure 60 is provided that restricts the movement of 43 and prevents the retainer 43 from contacting the seal member 51.
In the first embodiment, as shown in FIG. 2, the locking structure 60 includes an annular groove 61 formed in a portion corresponding to the annular portion 44 of the retainer 43 on the inner peripheral surface of the outer ring member 30, and a retainer. The outer peripheral surface of the annular portion 44 of the 43 has a locking portion 62 that protrudes annularly outward in the radial direction and engages with the groove portion 61.
Further, the axial gap between the one side wall surface of the groove 61 of the outer ring member 30 and the locking portion 62 of the retainer 43 is A, and the outer diameter side annular portion 53 of the core metal 52 of the seal member 51 and the retainer. 43 is set so that the relationship of “A <B” is established, where B is the axial clearance between the annular portion 45 and the annular portion 45.

The rolling bearing device according to the first embodiment is configured as described above.
Therefore, when the retainer 43 is assembled at a predetermined position in the annular space between the inner ring member 10 and the outer ring member 30, the retainer 43 is inserted from the opening on the roller bearing side of the annular space and the retainer 43 is elastically moved. The engaging portion 62 is pushed into a position where it fits into the groove portion 61 of the outer ring member 30 while being reduced in diameter. Thereby, the holder | retainer 43 is assembled | attached to the predetermined position of annular space. At this time, the rollers 42 are disposed in the respective pockets 47 of the cage 43. Further, after the retainer 43 is assembled, the seal member 51 is assembled to the roller bearing side opening of the annular space between the inner ring member 10 and the outer ring member 30.

When the bearing 42 rotates, a skewing force is generated in the roller 42, and when the cage 43 moves together with the roller 42 toward the seal member 51, the locking structure 60 provided between the outer ring member 30 and the cage 43. Accordingly, the movement of the cage 43 toward the seal member 51 is restricted.
Thereby, the contact of the retainer 43 with the seal member 51 can be avoided. For this reason, wear due to contact between the seal member 51 and the cage 43 can be suppressed, and durability can be improved.

In the first embodiment, the locking structure 60 includes a groove portion 61 formed on the inner peripheral surface of the outer ring member 30, and a locking portion 62 formed on the outer peripheral surface of the cage 43 and engaged with the groove portion 61. It is comprised. When a skewing force is generated in the roller 42 and the retainer 43 moves to the seal member 51 side together with the roller 42, the locking portion 62 of the retainer 43 comes into contact with the groove wall surface of the groove portion 61 of the outer ring member 30. The above movement of the cage 43 is suppressed. Thereby, the contact of the retainer 43 with the seal member 51 can be avoided.
As described above, the groove portion 61 is formed on the inner peripheral surface of the outer ring member 30, and the locking portion 62 that engages with the groove portion 61 is formed on the outer peripheral surface of the cage 43, thereby easily configuring the locking structure 60. be able to.

In the first embodiment, the axial clearance between the one side wall surface of the groove portion 61 of the outer ring member 30 and the locking portion 62 of the retainer 43 is A, and the outer diameter side of the core metal 52 of the seal member 51 When the axial gap between the annular portion 53 and the annular portion 45 of the retainer 43 is B, the relationship is set so that “A <B”.
As a result, the cage 43 moves together with the roller 42 to the seal member 51 side due to the skewing force of the roller 42, and the locking portion 62 of the cage 43 is in contact with the groove wall surface of the groove portion 61 of the outer ring member 30. In addition, the contact of the annular portion 45 of the retainer 43 with the outer diameter side annular portion 53 of the core metal 52 of the seal member 51 can be favorably avoided.

Further, in order to facilitate the assembly of the retainer 43 to the annular space between the inner ring member 10 and the outer ring member 30, as shown in FIG. 4, with respect to the annular portion 44 and the locking portion 62 of the retainer 43. It is also possible to form a plurality of slit-shaped split grooves 49 at predetermined intervals in the circumferential direction, and to form the cage 43 so that it can be elastically reduced in diameter with a small force.
In order to facilitate the assembly of the retainer 43 to the annular space between the inner ring member 10 and the outer ring member 30, one or more protrusions (not shown) are provided on the outer peripheral surface of the annular portion 44 of the retainer 43. It is also possible to form the locking portion by forming it.

Next, a second embodiment of the present invention will be described with reference to FIG.
As shown in FIG. 5, in the second embodiment, the groove 161 is formed in a portion located between the outer ring raceway surface 132 of the ball bearing on the inner peripheral surface of the outer ring member 130 and the outer ring raceway surface 133 of the roller bearing. A projecting ring portion 134 is formed adjacent to one side wall surface (roller bearing side wall surface) of the groove portion 161 and projecting annularly inward in the radial direction.
In addition, an inclined guide surface 135 for assembling and guiding the roller bearing retainer 143 is formed on the projecting wheel portion 134.

Further, in the cage 143, substantially in the same manner as in the first embodiment, both the annular portions 144 and 145 that are spaced apart from each other in the axial direction, the annular portions 144 and 145 are connected, and the rollers 142 are connected in the circumferential direction. A plurality of column portions 146 disposed with a pocket 147 to be held in between are integrally provided. A locking portion 162 constituting the locking structure 160 in cooperation with the groove 161 is formed on the outer peripheral surface of the annular portion 144 so as to protrude radially outward.
In the second embodiment, the inner diameter dimension of the outer ring raceway surface 133 of the roller bearing of the outer ring member 130 is set to be the same as or slightly larger than the outer diameter dimension of the locking portion 162 of the cage 143.

Also in the second embodiment, the axial gap between the one side wall surface of the groove 161 of the outer ring member 130 and the locking portion 162 of the retainer 143 is A ′, and the outside of the core metal 152 of the seal member 151 is outside. When the gap in the axial direction between the radial-side annular portion 153 and the annular portion 145 of the retainer 143 is B ′, the relationship “A ′ <B ′” is set.
Since the other configuration of the second embodiment is configured in the same manner as the first embodiment, the description thereof is omitted.

The rolling bearing device according to the second embodiment is configured as described above.
Therefore, when the retainer 143 is assembled at a predetermined position in the annular space between the inner ring member 110 and the outer ring member 130, the retainer 143 is inserted from the opening on the roller bearing side of the annular space. When the retainer 143 is pushed further after the locking portion 162 of the retainer 143 comes into contact with the guide surface 135 of the protruding ring portion 134, the retainer 143 is elastically reduced in diameter while being slidably guided by the guide surface 135. The
The retainer 143 is assembled at a predetermined position in the annular space by pushing the locking portion 162 to a position where the locking portion 162 fits into the groove portion 161 of the outer ring member 130.

  When the bearing 142 rotates, a skewing force is generated in the roller 142, and together with the roller 142, the retainer 143 moves to the seal member 151 side. In contact therewith, further movement of the cage 143 is suppressed. As a result, the contact of the cage 143 with the seal member 151 can be avoided.

Next, Embodiment 3 of the present invention will be described with reference to FIG.
As shown in FIG. 6, in the third embodiment, the locking structure 260 has a locking portion that is annularly projected on the outer peripheral surface of the inner ring member 210 so as to be engageable with the end surface 242 a on the seal member 251 side of the roller 242. 262.
Further, in the third embodiment, the end surface on the ball bearing side of the roller 242 is located at the portion located between the outer ring raceway surface 232 of the ball bearing on the inner peripheral surface of the outer ring member 230 and the outer ring raceway surface 233 of the roller bearing. A protruding wheel portion 234 having a roller guide surface 235 that abuts on the roller 242 and guides the roller 242 in a rolling manner is formed.
In Example 3, the axial clearance between the end surface 242a of the roller 242 on the seal member 251 side and the locking portion 262 is C, and the outer diameter side annular portion 253 of the cored bar 252 of the seal member 251 When the axial gap between the retainer 243 and the annular portion 245 is D, the relationship of “C <D” is set.
Since other configurations of the third embodiment are configured in the same manner as the first embodiment, the description thereof is omitted.

The rolling bearing device according to the third embodiment is configured as described above.
Therefore, when the cage 243 is assembled at a predetermined position in the annular space between the inner ring member 210 and the outer ring member 230, before the inner ring member 210 and the outer ring member 230 are assembled, A cage 243 that holds the plurality of rollers 242 in the pocket 247 is disposed. Thereafter, the inner ring member 210 and the outer ring member 230 are assembled.

During the rotation of the bearing, when a skewing force is generated in the roller 242 and the retainer 243 moves together with the roller 242 to the seal member 251 side, the end surface 242a of the roller 242 on the seal member 251 side is placed on one side wall surface of the locking portion 262. The roller 242 and the retainer 243 are further prevented from moving due to contact. Thereby, the contact of the holder 243 with the seal member 251 can be avoided.
In Example 3, the axial clearance between the end surface 242a of the roller 242 on the seal member 251 side and the locking portion 262 is C, and the axial clearance between the seal member 251 and the cage 243 is C. Is set such that “C <D”.
As a result, the cage 243 moves together with the roller 242 to the seal member 251 side due to the skewing force of the roller 242, and the end surface 242a of the roller 242 on the seal member 251 side is in contact with one side wall surface of the locking portion 262. In this case, the contact of the annular portion 245 of the cage 243 with the outer diameter side annular portion 253 of the metal core 252 of the seal member 251 can be favorably avoided.

A fourth embodiment of the present invention will be described with reference to FIG.
As shown in FIG. 7, in the fourth embodiment, the locking structure 360 has a stepped locking portion formed on the outer peripheral surface of the inner ring member 310 so as to be engageable with the end surface 342a of the roller 342 on the seal member 351 side. 362.
That is, in the fourth embodiment, the outer diameter of the opening on the seal member 351 side of the inner ring member 310 is set larger than the outer diameter of the inner ring raceway surface 313 of the roller bearing of the inner ring member 310. A step surface forming a locking portion 362 is formed between the inner ring raceway surface 313 and the outer peripheral surface of the opening on the seal member 351 side of the inner ring member 310.
In Example 4, the axial clearance between the end surface 342a of the roller 342 on the seal member 351 side and the locking portion 362 is C ′, and the outer diameter side annular portion 353 of the core metal 352 of the seal member 351 is set. And the annular gap 345 of the cage 343 is set so that the relationship of “C ′ <D ′” is established, where D ′ is the axial gap.
Since other configurations of the fourth embodiment are configured in the same manner as the third embodiment, description thereof is omitted.

The rolling bearing device according to the fourth embodiment is configured as described above.
Therefore, when the cage 343 is assembled at a predetermined position in the annular space between the inner ring member 310 and the outer ring member 330, the inner ring member 310 and the outer ring member 330 are assembled before the inner ring member 310 and the outer ring member 330 are assembled in the same manner as in the third embodiment. A cage 343 that holds a plurality of rollers 342 in a pocket 347 is disposed on the inner peripheral surface of the outer ring member 330. Thereafter, the inner ring member 310 and the outer ring member 330 are assembled.

  During the rotation of the bearing, when a skewing force is generated in the roller 342 and the retainer 343 moves to the seal member 351 side together with the roller 342, the end surface 342a of the roller 342 on the seal member 351 side is formed on one side wall surface of the locking portion 362. The roller 342 and the retainer 343 are further prevented from moving due to contact. Thereby, the contact of the cage 343 with the seal member 351 can be avoided.

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 implement with a various form.
For example, in the first to fourth embodiments, the case where the rolling bearing device is used for a water pump is illustrated, but the present invention can also be used for other than the water pump.

DESCRIPTION OF SYMBOLS 10 Inner ring member 30 Outer ring member 42 Roller 43 Cage 51 Seal member 52 Core metal 60 Locking structure 61 Groove part 62 Locking part

Claims (6)

An inner ring member; an outer ring member disposed on the same center line across an annular space on the outer periphery of the inner ring member; and a plurality of rollers disposed so as to be able to roll while being held in the annular space by a cage. A rolling bearing device including a seal member disposed adjacent to the retainer in the vicinity of the opening of the annular space and sealing the opening of the annular space,
Between the inner ring member and the outer ring member, between the at least one race ring member and the cage, the cage is moved to the seal member side by the skew force of the roller during bearing rotation. A rolling bearing device characterized in that a locking structure is provided to restrict and avoid contact of the cage with the seal member. The rolling bearing device according to claim 1,
The locking structure has a groove portion formed on the inner peripheral surface of the outer ring member, and a locking portion formed on the outer peripheral surface of the cage and engaged with the groove portion. . The rolling bearing device according to claim 2,
When the axial gap between the one side wall surface of the groove portion of the outer ring member inner peripheral surface and the locking portion is A and the axial gap between the seal member and the cage is B, “A A rolling bearing device having a relationship of <B>. It is a rolling bearing device according to claim 2 or 3,
The locking portion is formed in an annular shape in the circumferential direction of the outer peripheral surface of the annular portion of the cage,
A rolling bearing device according to claim 1, wherein a plurality of slit-shaped split grooves are formed at predetermined intervals in the circumferential direction in the annular portion and the locking portion of the cage. The rolling bearing device according to claim 1,
A rolling bearing device characterized in that the locking structure is constituted by a locking portion formed on the outer peripheral surface of the inner ring member so as to be engageable with the end surface on the seal member side of the roller. The rolling bearing device according to claim 5,
When the axial clearance between the end surface of the roller on the seal member side and the locking portion is C, and the axial clearance between the seal member and the cage is D, “C <D” A rolling bearing device characterized by being set to have a relationship.

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