JP5043603B2 - Rolling bearing - Google Patents

Description

  The present invention relates to a rolling bearing having a race ring that is fitted with clearance, such as a bearing for office equipment and a bearing unit.

  In order to facilitate the fitting of the raceway, a clearance fit between the raceway and the mating counterpart member is widely performed. However, if the race ring is fitted, creep occurs and the fitting surface may be worn. For this reason, conventionally, a lubricant is put into the fitting clearance formed by the fitting surface of the race and the mating member, and the fitting clearance is closed with a squeeze packing to seal the lubricant, thereby reducing the wear on the fitting surface. Prevention is performed (Patent Document 1).

Specifically, by forming a circumferential groove at the intermediate part between the raceway and each width surface in the axial direction of the radial surface on the fitting side of the raceway, the clearance between the raceway and the mating member is expanded. Part is to be generated. This is because a space in which the squeeze packing is interposed between the raceway ring and the mating counterpart member is formed in the circumferential groove, and the formation of the circumferential groove prevents the raceway rigidity from being lowered.
The packing fitted in each circumferential groove protrudes in the radial direction from the fitting surface of the raceway so that a crushing margin is given in the clearance expansion portion. An O-ring is employed as the squeeze packing. This is because, compared to a square ring, there is less resistance and hooking when the mating member slides in the axial direction, and twisting and distortion are less likely to occur. Note that “crushing margin is given” means that the squeeze packing is fitted in the gap enlarged portion between the race ring and the mating mating member, and the squeeze packing is crushed by the mating of the race ring and the mating mating member. Means an acceptable amount.
After the squeeze packing is fitted in each circumferential groove and the lubricant is applied to the fitting surface of the race ring and the squeeze seal, the race ring is fitted to the mating counterpart member. During this fitting operation, the squeeze packing protruding from the circumferential groove is positioned by the groove wall and is crushed between the race and the mating member. For this reason, when the fitting operation is completed, a state in which the lubricant is sealed can be obtained.

JP 2006-275244 A

Like the rolling bearing of the above-mentioned Patent Document 1, when the wear of the fitting surface is prevented with the lubricant placed in the fitting gap, the higher the filling degree of the fitting gap, the more advantageous for preventing wear and prolonging the maintenance cycle. .
However, the rolling bearing disclosed in the above-mentioned Patent Document 1 has a configuration in which the squeeze packing is crushed between both squeeze packings even if the lubricant is filled between both squeeze packings. It is unavoidable that the gap oozes out of the gap, and the filling degree of the lubricant in the fitting gap is about 80% to 90%.

  Accordingly, an object of the present invention is to fill a larger amount of the lubricant in the fitting gap between the race and the mating member.

  In order to achieve the above object, the present invention includes a squeeze packing that seals a lubricant in a fitting clearance between a bearing ring and the mating counterpart member, and the squeeze packing is provided between the race ring and the mating counterpart member. In the rolling bearing in which a crushing margin is given in the clearance expansion portion, the clearance expansion portion is a space that is wider than the squeeze packing and has an opening that exposes the squeeze packing to the outside, and the squeeze The structure is characterized in that the packing is displaced to the center side of the race ring width through the opening, and a packing presser for restricting the squeeze packing to the displacement position is provided.

  Here, the clearance increasing portion communicates with the fitting clearance between the fitting surfaces of the bearing ring and the mating counterpart member (that is, the fitting tolerance setting portion) on the bearing ring width surface side, and the radial clearance width is increased. It is a space, and is formed by the radial surface on the fitting side of the race and the mating counterpart member. This clearance expansion portion is obtained by forming a recess from the fitting surface over the entire circumference of the raceway and / or the fitting-side radial surface of the mating counterpart member.

If the clearance expansion portion is formed wider than the squeeze packing, even if the squeeze packing is interposed between the race ring and the mating counterpart member in the clearance expansion portion, a lubricant filling space is obtained at the center side of the race ring width. be able to. Since the filling space is in the clearance expansion portion, it is possible to perform the fitting operation between the race ring and the mating counterpart member while storing the lubricant.
If the clearance enlargement portion is a space having an opening that exposes the squeeze packing to the side, the squeeze packing is externally exposed from the outside through the opening while the race and the mating member are fitted. Can be displaced to the center side of the raceway width.
At this time, the squeeze packing is provided with a crushing margin in the clearance expansion portion, and has a sealing action. For this reason, the lubricant put in the filling space is injected into the fitting clearance side communicating with the clearance expansion portion as the clearance expansion portion is reduced by displacement of the squeeze packing. Thereby, the filling degree of the fitting clearance between the bearing ring and the mating counterpart member is increased.
If a packing presser that restricts the squeeze packing to the above-mentioned displacement position is provided, the lubricant injected into the fitting gap does not escape to the gap enlarged portion side, and a state where the filling degree of the fitting gap is increased is maintained.
Therefore, according to the present invention, the amount of lubricant stored in the gap expanding portion can be more filled in the fitting gap by the amount injected into the fitting gap between the bearing ring and the mating counterpart member.

  For example, a ring-shaped one in which the opening is opened over the entire circumference between the raceway ring and the mating counterpart member, and the packing presser is applied from the side to the squeeze packing interposed in the gap enlarged portion. By adopting the configuration described above, the squeeze packing can be pushed and moved by the packing presser over the entire circumference.

  The ring-shaped packing holder may be either an endless ring shape or an end ring shape as long as the entire squeeze packing can be displaced without distortion.

  Here, if the packing presser is made into an endless ring shape, the squeeze packing can be pressed over the entire inner surface of the clearance enlarged portion by the packing presser. By this pressing, the squeeze packing can be expanded in the radial direction within the gap enlarged portion. Since the packing presser is provided in this state, the frictional contact between the squeeze packing, the race and the mating counterpart member is strengthened, and the sealing performance of the squeeze packing can be further enhanced and the creep resistance can be increased.

  If the structure having the clearance expanding portion, the squeeze packing, and the packing presser on both sides of the raceway ring is adopted, the amount of lubricant extra injected into the fitting clearance is doubled, so the degree of filling is further increased. be able to.

The bearing ring is an inner ring, and a recess and an opening are formed on the inner diameter surface of the bearing ring, and the packing retainer is detachable from the bearing ring. If the rolling element is incorporated in the housing, a bearing unit can be constituted by the rolling bearing according to the present invention.
The bearing unit is a unit in which a rolling bearing is incorporated in the housing, and is selected according to the specification of the rotating shaft. By forming a recess that creates a clearance expansion part on the inner ring side that is fitted with the rotary shaft and making the packing retainer removable, the inner ring, squeeze packing, etc. By carrying out various product developments so as to produce the effects of the invention, it is possible to avoid changes in the specifications of the rotary shaft and customization, so that the present invention can be provided at low cost.

As the lubricant, a lubricant having a viscosity that can be filled over the entire circumference of the gap enlarged portion, for example, grease or oil having a viscosity of 100 (mm ² / S) or more can be used.

  If the lubricant has conductivity, it is possible to obtain continuity between the race and the mating member. Therefore, the rolling bearing according to the present invention is an energized bearing in which the inner and outer rings are made conductive, It becomes possible to conduct between the rotating shafts by a bearing.

  As described above, according to the present invention, the clearance enlargement portion is a space having an opening that is wider than the squeeze packing and that exposes the squeeze packing to the side, and the squeeze packing is passed through the opening. By adopting a configuration in which a squeeze packing is provided with a packing presser that is displaced toward the center of the width and restricts the squeeze packing to the above-mentioned displacement position, the clearance accumulated in the clearance gap between the race and the mating counterpart member The amount of lubricant injected into the side can be filled with a larger amount of lubricant in the fitting clearance.

Hereinafter, a first embodiment of the present invention will be described with reference to the accompanying drawings.
FIG. 1 shows a main portion of an axial section in a state where a rotating shaft is supported by a rolling bearing according to the first embodiment. FIG. 2 shows a disassembled state in which the squeeze packing 3 and the packing retainer 4 are removed from the inner race 1 of the inner and outer races 1 and 2 of the rolling bearing according to the first embodiment, and a part of the circumferential direction thereof is shown. It is broken and displayed across both widths. Hereinafter, the inner race 1 is referred to as an inner race 1 and the outer race 2 is referred to as an outer race 2.

  As shown in FIG. 1 and FIG. 2, the rolling bearing according to the first embodiment is such that the inner ring 1 and the mating counterpart member composed of the rotating shaft 5 are fitted with a clearance. The outer ring 2 is a centering outer ring and is fitted to a mating counterpart member made of the housing 6. In the rolling bearing according to the first embodiment, inner and outer rings 1 and 2 and a plurality of rolling elements 7 are incorporated in a housing 6 to constitute a bearing portion of a bearing unit.

  In the rolling bearing according to the first embodiment, the inner and outer rings 1 and 2, the rotating shaft 5, the housing 6 and the plurality of rolling elements 7 are each made of metal, and conductive grease is sealed between the inner and outer rings 1 and 2. The conductive bearing is sealed by 8,8.

  The inner ring 1 and the rotating shaft 5 have fitting surfaces 1a and 5a, whose fitting tolerances are controlled, on the fitting-side radial surface. When the rotating shaft 5 is passed through the inner ring 1, a fitting clearance 9 is formed between the fitting surfaces 1a and 5a.

  The fit clearance 9 is closed by squeeze packings 3 and 10. Lubricant (indicated by dots in FIG. 1) is filled in the fit clearance 9. O-rings are used for the squeeze packings 3 and 10, respectively.

  The width surface 1b on one side of the inner ring 1 and the fitting surface 1a are connected by a recess 1c whose inner diameter is larger than that of the fitting surface 1a. The recessed portion 1c generates a clearance expanding portion 11 which is a space in which the inner ring 1 and the rotary shaft 5 are fitted and communicated with the fitting clearance 9 on the width surface 1b side and the clearance width in the radial direction is increased.

  The recess 1c is opened on the side surface on one side of the inner ring 1 over the entire circumference, and the rotating shaft 5 has an outer diameter that is clearance-fitted with the inner ring 1. For this reason, the clearance expanding portion 11 is a space having an opening that opens to one side surface over the entire circumference between the inner ring 1 and the rotation shaft 5. If the concave portion 1c is opened to the side surface of the inner ring 1, the width of the clearance expanding portion 11 can be maximized.

  Further, the recess 1 c is formed wider than the squeeze packing 3. This is because the gap enlarged portion 11 is generated wider than the squeeze packing 3.

  The diameter of the recess 1c and the rotary shaft 5 is set so that a radial crushing margin is given to the squeeze packing 3 in a state where the inner ring 1 and the rotary shaft 5 are fitted. Therefore, the squeeze packing 3 is crushed in the clearance expanding portion 11, and as a result, the lubricant is sealed in the clearance expanding portion 11.

  The squeeze packing 3 can be pushed into the clearance expanding portion 11 through an open port over the entire circumference of the clearance expanding portion 11. The pushed-in squeeze packing 3 is exposed to the outside from the opening of the gap expanding portion 11. Since the clearance expanding portion 11 is wider than the squeeze packing 3, the queeze packing 3 can be further pushed in from the opening to the center side of the inner ring width.

FIG. 3 shows a state in which the squeeze packing 3 is pushed into the clearance enlargement portion 11.
As shown in FIG. 3, the squeeze packing 3 can be pushed in by using a packing presser 4. This packing retainer 4 is an endless ring-shaped member, and has a mounting flange portion 4a that abuts against the width surface 1b of the inner ring 1 and a cylindrical portion 4b that abuts against the squeeze packing 3 pushed into the clearance expanding portion 11 from the side. is doing. The cylindrical portion 4b can push the squeeze packing 3 over the entire circumference, and has a shape guided in the radial direction by the recess 1c during this time.

  As shown in FIG. 1, the cylindrical portion 4b of the packing presser 4 is inserted until the squeeze packing 3 is pressed against the diameter difference wall between the recess 1c and the fitting surface 1a. Displacement of the squeeze packing 3 toward the center side of the inner ring width is regulated by the diameter difference wall, and the squeeze packing 3 is expanded in the radial direction in the clearance expanding portion 11 by the pressing. At this time, the mounting flange portion 4 a abuts against the width surface 1 b of the inner ring 1. The packing retainer 4 is provided on the inner ring 1 by fastening the mounting flange portion 4 a to the width surface 1 b of the inner ring 1 with a plurality of bolts 12. Thereby, the displacement to the width surface 1b side of the squeeze packing 3 is regulated by the packing presser 4, and the squeeze packing 3 is maintained in the expanded state.

  The plurality of bolts 12 are screwed in the axial direction. This is because the bolt 12 is difficult to loosen even when the rotating shaft 5 generates vibration.

  Further, in the state where the packing presser 4 is provided as described above, a radial clearance 13 is generated between the cylindrical portion 4b and the rotating shaft 5, and wear of the cylindrical portion 4b and the rotating shaft 5 is prevented. This is because the gap between the recess 1c and the rotary shaft 5 is lubricated only by the lubricant leaking from the squeeze packing 3.

  A circumferential groove 1e is formed in an intermediate portion between the width surface 1d on the other side of the inner ring 1 and the fitting surface 1a. The point that the squeeze packing 10 is mounted in the circumferential groove 1e is the same as the conventional one.

  As the lubricant, grease that can be filled in the gap expanding portion 11 in a state where the gap expanding portion 11 is opened is used. This grease has conductivity. The rolling bearing according to the first embodiment is a conductive bearing as described above, and the rotating shaft 5 and the housing 6 are also conductors. For this reason, the electrical connection between the rotating shaft 5 and the housing 6 is ensured through the bearing.

A method for filling the lubricant between the inner ring 1 and the rotating shaft 5 of the rolling bearing according to the first embodiment having the above-described configuration will be described below.
Before the inner ring 1 and the rotary shaft 5 are fitted, the squeeze packing 10 is fitted into the circumferential groove 1e, and the lubricant is applied to the squeeze packing 10, the fitting surface 1a and the recess 1c over the entire circumference. Instead of applying the lubricant to the recess 1c, the lubricant may be applied to the gap expanding portion 11 after the inner ring 1 and the rotary shaft 5 are fitted.
After fitting the inner ring 1 and the rotary shaft 5, as shown in FIG. 3, the squeeze packing 3 is slightly pushed in from the opening of the clearance expanding portion 11, and the cylinder of the packing presser 4 is laterally inserted into the squeeze packing 3. The squeeze packing 3 is pushed further into the center of the raceway width by moving the packing presser 4 toward the inner ring 1 side while applying the part 4b.
During this time, the lubricant that has been applied to the recess 1c or applied to the clearance expanding portion 11 and sealed in the clearance expanding portion 11 is sealed by the squeeze packing 3 provided with a crushing margin. As the volume of the portion 11 is reduced in the axial direction, it is injected into the fitting gap 9.
In a state where the squeeze packing 3 is displaced until it is pressed against the diameter difference wall between the recess 1c and the fitting surface 1a, substantially the entire amount of the lubricant in the gap expanding portion 11 is injected into the fitting gap 9.
The opposite side of the fit clearance 9 is closed with a squeeze packing 10, and the lubricant does not leak to the outside from the opposite side during injection. For this reason, the filling degree of the lubricant in the fitting gap 9 is increased by the amount of the above injection.
When the mounting flange portion 4 a is fastened to the width surface 1 b of the inner ring 1 with a plurality of bolts 12, the packing presser 4 is provided on the inner ring 1. As a result, the squeeze packing 3 is maintained in a radially expanded state, and the lubricant injected into the fitting gap 9 cannot escape to the gap enlarged portion 11 side, and the filling degree of the fitting gap 9 is increased. Maintained.
Therefore, the rolling bearing according to the first embodiment fills the fitting clearance 9 with a larger amount of the lubricant as much as the lubricant accumulated in the clearance expanding portion 11 is injected into the fitting clearance 9 side of the inner ring 1 and the rotary shaft 5. be able to.

  Further, as a result of the squeeze packing 3 being maintained in the radially expanded state, frictional contact between the squeeze packing 3 and the inner ring 1 and the rotating shaft 5 is strengthened. For this reason, the rolling bearing according to the first embodiment can enhance the sealing performance of the squeeze packing 3 and can also increase the creep resistance.

  Moreover, since the rolling bearing which concerns on this 1st Embodiment can push the squeeze packing 3 over the perimeter with the packing presser 4, it is hard to occur that the squeeze packing 3 twists or distorts. For the same purpose, an O-ring is used for the squeeze packing 3.

The squeeze packing 3 can be fitted in the recess 1 c before the inner ring 1 and the rotary shaft 5 are fitted. In this case, while the inner ring 1 and the rotating shaft 5 are fitted, a squeezing margin is given to the squeeze packing 3.
Here, since the recess 1c is open to one side surface of the inner ring 1, when fitted from the squeeze packing 10 side, the squeeze packing 3 rubbed against the rotating shaft 5 is unexpectedly displaced to the width surface 1b side. There is a risk of losing.
When fitted from the squeeze packing 3 side, there is no fear that the squeeze packing 3 rubbed against the rotating shaft 5 will come off.
However, since the squeeze packing 3 is not pressed by a solid wall such as the packing retainer 4, the squeeze packing 3 is easily distorted while being displaced toward the center side of the inner ring width, resulting in poor sealing or a fit clearance 9. There is a concern that the injection balance over the entire circumference may be lost. For this reason, it is better to push the squeeze packing 3 into the clearance expanding portion 11 with the packing presser 4 after the inner ring 1 and the rotary shaft 5 are fitted as described above.

  Further, the rolling bearing according to the first embodiment constitutes a bearing portion of a bearing unit that is selected according to the specifications of the rotary shaft 5, and a concave portion 1 c is formed on the side of the inner ring 1 to be fitted with the rotary shaft 5. In addition, since the packing retainer 4 can be attached and detached with the bolts 12, it is possible to avoid changing the specifications of the rotating shaft 5 and customizing the product by developing the inner ring 1, the squeeze packing 3 and the like with various settings.

  In the first embodiment, the clearance enlarged portion 11, the squeeze packing 3, and the packing presser 4 are provided only on one side of the inner ring 1. However, the clearance enlarged portion 11 and the like may be provided on both sides. is there. As an example, FIG. 4 shows a second embodiment.

  As shown in the axial cross section of the main part of the second embodiment in FIG. 4, the rolling bearing according to the second embodiment has a clearance enlarged portion 11, a squeeze packing 3, a packing presser 4, etc. on the other side of the inner ring 1. The lubricant can be injected into the fitting clearance 9 from both sides. Since the rolling bearing according to the second embodiment doubles the amount of lubricant to be injected, the filling degree of the fitting clearance 9 can be further increased.

  Moreover, in 1st and 2nd embodiment, although the endless ring-shaped packing press was employ | adopted, an ended ring-shaped packing press can also be employ | adopted. As an example, FIG. 5 shows a third embodiment.

  As shown in FIG. 5 (a), which shows an axial cross section of the main part of the third embodiment, the rolling bearing according to the third embodiment has a clearance fit between the inner ring 21 and the rotating shaft 22, and the fit clearance 23 is passed through the squeeze packing 24. , 25 is the same as the first and second embodiments.

  The squeeze packing 24 interposed between the width surface 21a on one side of the inner ring 21 and the shoulder portion 22a of the rotating shaft 22 exhibits a sealing action by being given a crushing margin in the axial direction. The squeeze packing 24 particularly employs a square ring. This is because the inner ring 21 is pressed against the shoulder 22a side, and the width surface 21a, the shoulder 22a and the squeeze packing 24 are brought into surface contact to stabilize the contact state.

  A recess 21d having an enlarged inner diameter is formed between the width surface 21b on the other side of the inner ring 21 and the fitting surface 21c. FIG. 5B is an enlarged view showing a state in which the squeeze packing 25 is pushed into the clearance expanding portion 26. As shown in FIG. 5 (b), the recess 21d generates a clearance expanding portion 26 when the inner ring 21 and the rotating shaft 22 are fitted. The method for storing the lubricant in the fitting clearance 23 and the clearance expanding portion 26 can be the same as in the first embodiment.

The squeeze packing 25 has a seal cylinder portion 25 a that is pushed into the clearance expanding portion 26, and an annular plate-like flange portion 25 b that contacts the width surface 21 b of the inner ring 21. The pushing operation of the squeeze packing 25 is performed with the squeeze packing 24 interposed between the shoulder portion 22a of the rotating shaft 22 and the inner ring 21, as shown in FIG.
As shown in FIG. 5 (b), the seal cylinder portion 25 a of the squeeze packing 25 is pushed from the outside into the open port over the entire circumference of the gap expanding portion 26 with the lubricant accumulated in the gap expanding portion 26. In addition, a sealing action is achieved by applying a crushing margin. In order to facilitate this push-in, the seal tube portion 25a is formed in a conical shape with an outer diameter at one end.
The seal tube portion 25a can be pushed deeply with a pipe-shaped jig or the like through the opening of the clearance expanding portion 26. During this pushing, the inner ring 21 is pushed to the shoulder 22a side by the sliding of the seal tube portion 25a, and the squeeze packing 24 is crushed. For this reason, there is no fear that the lubricant leaks between the inner ring 21 and the shoulder 22a.
As shown in FIG. 5 (a), when the seal cylinder portion 25 a abuts against the diameter difference wall between the recess 21 d of the inner ring 21 and the fitting surface 21 c, substantially the entire amount of lubricant in the gap expanding portion 26 becomes the fitting gap 23. Being injected. At this time, the flange portion 25b is in close contact with the width surface 21b of the inner ring 21 over the entire circumference.
In this state, a packing retainer 27 made of a retaining ring can be provided in the ring groove of the rotating shaft 22 by fitting. As a result, the inner ring 21 and the squeeze packings 24 and 25 are fixed in a state of being sandwiched between the shoulder portion 22a and the packing presser 27, and the squeeze packing 24 is maintained sealed and the squeeze packing 25 is restricted to the displacement position. Is also maintained.

In addition, instead of pressing the squeeze packing with the ring-shaped packing press as in the first to third embodiments, the clearance enlarged portion and the radial surface on the fitting side of the raceway ring and / or the mating counterpart member, A circumferential groove is formed, and the opening of the widened gap portion is composed of a plurality of holes penetrating the circumferential groove from the width surface of the bearing ring and / or the side surface of the mating member, and the squeeze packing is provided in the circumferential groove. It is also possible to adopt a configuration in which the race ring and the mating member are fitted in a state in which is fitted, and a thrust bar is inserted into each hole simultaneously from the outside to push the entire squeeze packing toward the center side of the race ring width. The plurality of holes need only be distributed in the circumferential direction so that the entire squeeze packing can be displaced.
The rolling bearings according to the first to third embodiments can form the clearance expanding portion and the opening by simply turning the recess by adopting the clearance expanding portion having the opening around the entire circumference. As a result, the processing is superior to the above alternative structure in which a plurality of holes are formed, in that the processing is simple.

The rolling bearings according to the first to third embodiments have been described by taking the inner ring creep countermeasure as an example. However, in the rolling bearing in which the housing and the outer ring are fitted, the outer ring and the housing are used as countermeasures against the outer ring creep caused by the rotational load. The same can be applied when the lubricant is sealed with a squeeze packing in the gap between the gaps.

The principal part enlarged view of the axial cross section of 1st Embodiment. 1 is an exploded perspective view of a state in which the squeeze packing and the packing presser are removed from the inner ring of FIG. Operational diagram showing the state in the middle of pushing in the squeeze packing of FIG. The principal part enlarged view of the axial cross section of 2nd Embodiment. a is an enlarged view of the main part of the axial section of the third embodiment, and b is an operational view showing the state in the middle of pushing the squeeze packing of a in the axial section.

Explanation of symbols

1, 2, 21 Race rings 1a, 5a, 21c Fitting surface 1b, 1d, 21a, 21b Width surface 1c, 21d Recess 1e Circumferential groove

3, 10, 24, 25 Squeeze packing 4, 27 Packing retainer 4a Mounting flange 4b Tube

5, 22 Rotating shaft 6 Housing 7 Rolling elements 9, 23 Fitting clearance 11, 26 Clearance expanding portion 12 Bolt 13 Radial clearance 22a Shoulder portion 25a Seal cylinder portion 25b Flange portion

Claims (6)

Comprising a squeeze packing to seal the lubricant in the fitting gap between the mating member and the bearing ring, the squeeze packing, given white crushed in the radial direction in the clearance enlarged portion between the bearing ring and the mating member in those and the rolling bearing to be, the gap enlarged portion, the squeeze wider at more packing, and the squeeze packing the space with an open mouth to be exposed outside the side, the bearing ring and the mating member is fitted The squeeze packing is interposed between the bearing ring and the mating member in the clearance expanding portion, and the clearance expanding portion located on the center side of the squeeze packing width of the squeeze packing has a sealing action. in a state containing the lubricant by Rukoto is displaced in the track Wahaba center side the squeeze packing through said mouth opening, said gaps Most lubricant is injected into the gap side fit the communicating with the rolling bearing the squeeze packing is characterized in that so as to equip the gland which regulates the displacement position of the.   The opening is opened over the entire circumference between the bearing ring and the mating counterpart member, and the packing retainer is a ring-shaped one that is applied to the squeeze packing interposed in the clearance expansion portion from the side. The rolling bearing according to claim 1.   3. The packing holder according to claim 2, wherein the packing holder is an endless ring, and the squeeze packing is expanded in the radial direction within the gap expanding portion by pressing the squeeze packing against the inner surface of the gap expanding portion with the packing holder. The rolling bearing described.   The rolling bearing according to any one of claims 1 to 3, wherein the clearance expanding portion, the squeeze packing, and the packing presser are provided on both sides of the raceway ring.   The bearing ring is an inner ring, and a recess and an opening are formed on the inner diameter surface of the bearing ring, and the packing retainer is detachable from the bearing ring. The rolling bearing according to claim 1, wherein the rolling element is incorporated in a housing. The rolling bearing according to any one of claims 1 to 5, wherein the lubricant has conductivity.

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