JP2013011291A - Fixing structure of race ring and fixing method of the race ring - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the fixing structure of a race ring and the fixing method of the race ring for fixing split rings to each other without giving an impact and capable of adjusting assembling dimensions in the axial direction of the split rings.SOLUTION: The fixing structure of the race ring includes: an outer ring 3 for rolling bearing, which is composed of a plurality of split rings 11, 12 split in the axial direction and has a through-hole formed in the axial direction; and a fixing means 20 for fixing the split rings 11, 12 to each other. The fixing means 20 includes: a first regulation member 21 and a second regulation member 22 which are attached to both sides in the axial direction of the through-hole 17; a wire 23a disposed between the first regulation member 21 and the second regulation member 22 in the through-hole 17; and a winch 29a which applies force in the axial direction to make the first regulation member 21 and the second regulation member 22 approach each other by generating tension to a wire 23a.

Description

  The present invention relates to a structure for fixing a bearing ring of a rolling bearing and a method for fixing the bearing ring.

For example, a swivel bearing is used in a rotation support part of an industrial machine, and a general swivel bearing has an inner ring, an outer ring, and a rolling element having double row rolling elements provided between the inner and outer rings. It consists of a bearing. FIG. 5 is a cross-sectional view of a conventional swivel seat bearing 90. An outer ring 91 included in the swivel seat bearing 90 includes a pair of split rings 92 and 93 that are divided into two in the axial direction.
When the raceway surfaces 94 and 95 are formed on the inner peripheral surface of the outer ring 91 by machining, or when the swivel bearing 90 is temporarily assembled, it is necessary to fix the split wheels 92 and 93 to each other.

Therefore, in order to fix the split wheels 92 and 93 to each other, conventionally, an axial through hole 96 is formed in the split wheels 92 and 93, and a spring pin 97 is driven and inserted into the through hole 96. For example, in order to check whether or not a predetermined axial gap is secured by temporary assembly, balls (rolling elements) 98 and split wheels 92 and 93 are arranged on the outer peripheral side of the inner ring 99, and spring pins 97 are inserted into the through holes 96. Is fixed so that the split wheels 92 and 93 are integrated with each other and temporarily assembled.
However, in this case, due to the impact when driving the spring pin 97, an impact force may act between the ball 98 and the raceway surfaces 94 and 95, and indentations may occur on the raceway surfaces 94 and 95.

  Then, as invention regarding the fixing structure of the above split rings, there exists a thing of patent documents 1, and in this invention, a cylindrical coupling member is inserted in the axial direction through-hole formed in the split ring (bearing parts). Is provided. And the division | segmentation ring is fixed and it is set as the non-separation state by expanding the edge part of this coupling member to radial direction outer side, and forming the allowance for a division | segmentation ring.

JP 2006-144829 A

  According to the fixing structure described in Patent Document 1, there is no need to drive the spring pins 97 as shown in FIG. Once the split wheels are fixed to each other by the coupling member, it is difficult to adjust (change) the assembly dimension in the axial direction between the split wheels. For example, it becomes difficult to adjust the axial gap in the temporary assembly.

  Accordingly, an object of the present invention is to provide a bearing ring fixing structure and a method of fixing a bearing ring that can fix the split wheels without giving an impact, and can adjust the assembly dimension in the axial direction of the divided wheels. provide.

  The present invention provides a bearing ring for a rolling bearing which is composed of split rings divided in the axial direction and in which axial through-holes are linearly formed, and the split rings are pressed against each other in the axial direction. A first restricting member and a second restricting member attached to both sides of the through hole in the axial direction in a state in which movement toward the inner side in the axial direction is restricted. And a linear member provided between the first restricting member and the second restricting member in the through-hole, and the first restricting member generated by increasing tension in the linear member. And a tension generating section for applying an axial force that makes the second regulating member approach each other.

According to the present invention, the first restricting member and the second restricting member are attached to both sides in the axial direction of the through hole in a state in which the movement in the axial direction is restricted, and the first restricting member and the second restricting member are attached. By generating the linear member between the members while increasing the tension, an axial force that causes the first restricting member and the second restricting member to approach each other is applied. With this axial force, the split wheels can be fixed in a state where the split wheels are pressed against each other in the axial direction. Further, when this fixing is performed, no impact is applied to the split wheels as in the prior art. .
Further, by adjusting the tension generated in the linear member, the assembly dimension in the axial direction of the split ring can be adjusted. For example, by increasing the tension, it is possible to adjust the axial distance between the raceway surfaces of each of the split wheels in the direction of narrowing.

Further, one or both of the first restricting member and the second restricting member has a tapered surface whose inner side in the axial direction has a smaller diameter than the opening of the through hole and whose outer side in the axial direction has a larger diameter than the opening. The outer peripheral surface is preferably provided.
In this case, the regulating member having the tapered surface on the outer peripheral surface is in a state in which a part thereof is inserted into the through hole and fits into the opening, thereby restricting movement inward in the axial direction. That is, it is possible to restrict the movement of the restricting member in the axial direction with a simple configuration.

  The fixing means preferably further includes a cylindrical member that is inserted into the through hole across the divided wheels and is in contact with the inner peripheral surface of the through hole. By the member, alignment in the radial direction between the split wheels can be performed with high accuracy.

The tension generating portion is mounted on one or both of the first restricting member and the second restricting member, and is capable of winding the linear member made of a wire, and the wound wire is in its state. A winch that can be held by
In this case, tension is generated in the wire by winding the linear member made of the wire. And the tension | tensile_strength of the said wire can be maintained by hold | maintaining the wound wire in the state, and the state which fixed the division | segmentation ring | wheels is obtained.

  Further, the present invention is a method of fixing a bearing ring for a rolling bearing, which is composed of split rings divided in the axial direction and in which axial through holes are linearly formed, on both sides in the axial direction of the through holes. The first restriction member and the second restriction member are attached in a state where movement in the axially inner side is restricted, and the first restriction member and the second restriction member are provided in the through hole. By causing the linear member to generate while gradually increasing the tension, an axial force that causes the first restricting member and the second restricting member to approach each other is applied, and the split wheel is generated by the axial force. The divided wheels are fixed to each other in a state where the two are pressed against each other in the axial direction.

According to the present invention, the first restricting member and the second restricting member are attached to both sides of the through hole in the axial direction as a state in which movement in the axially inner direction is restricted, and the first restricting member, the second restricting member, By generating the linear member while increasing the tension gradually, an axial force that causes the first restricting member and the second restricting member to approach each other is applied. With this axial force, the split wheels can be fixed in a state where the split wheels are pressed against each other in the axial direction. Further, when this fixing is performed, no impact is applied to the split wheels as in the prior art. .
Further, by adjusting the tension generated in the linear member, the assembly dimension in the axial direction of the split ring can be adjusted. For example, by increasing the tension, it is possible to adjust the axial distance between the raceway surfaces of each of the split wheels in the direction of narrowing.

  According to the present invention, it is possible to fix the split wheels by causing the linear member between the first restricting member and the second restricting member to increase while increasing tension. There is no impact on the split wheel as in the prior art. Further, by adjusting the tension generated in the linear member, the assembly dimension in the axial direction of the split ring can be adjusted.

It is explanatory drawing explaining the fixed structure of the bearing ring of this invention, and has shown the cross section of the rolling bearing containing this fixed structure. It is explanatory drawing of the 1st control member which the fixing structure of FIG. 1 has, a 2nd control member, a linear member, and a tension generation part. It is explanatory drawing explaining other embodiment of the fixed structure of the bearing ring of this invention, and has shown the cross section of the rolling bearing containing this fixed structure. It is explanatory drawing explaining further another embodiment of the fixing structure of a bearing ring. It is sectional drawing of the conventional turning seat bearing.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is an explanatory view for explaining a structure for fixing a bearing ring according to the present invention. In FIG. 1, the cross section of the rolling bearing 1 containing this fixed structure is shown. The rolling bearing 1 is a double row type, and includes an inner ring 2, an outer ring 3, and double row balls (rolling elements) 4 and 5 provided between the inner ring 2 and the outer ring 3. This rolling bearing 1 is used, for example, as a rotation support portion (swivel seat bearing) of an industrial machine.

  In the embodiment of FIG. 1, of the inner ring 2 and the outer ring 3 that are track rings, the outer ring 3 includes divided wheels 11 and 12 that are divided in the axial direction. An outer raceway surface 13 on which the balls 4 roll is formed on the inner peripheral surface of the first split ring 11, and an outer raceway surface 14 on which the balls 5 roll is formed on the inner peripheral surface of the second split ring 12. Has been. Further, a hole 15 penetrating in the axial direction is formed in the first split ring 11, and a hole 16 penetrating in the axial direction is formed in the second split ring 12. These holes 15 and 16 have the same diameter and are continuously formed along the same straight line. By these holes 15 and 16, an axial through hole 17 linearly penetrating the outer ring 3 over the entire length is formed. It is formed. Although not shown, a plurality of through holes 17 are formed at predetermined intervals in the circumferential direction in the outer ring 3. For example, in the case of the rolling bearing 1 having an inner diameter of 1000 mm, 16 through holes 17 are formed at equal intervals.

  The inner ring 2 is made of a single member. An inner raceway surface 18 on which the plurality of balls 4 roll and an inner raceway surface 19 on which the plurality of balls 5 roll are formed on the outer peripheral surface of the inner ring 2. The balls 4 included in one row are in angular contact with the outer raceway surface 13 and the inner raceway surface 18, and the balls 5 included in the other row are in angular contact with the outer raceway surface 14 and the inner raceway surface 19.

  The track ring (outer ring 3) fixing structure of the present invention includes a fixing means 20 for fixing the split wheels 11 and 12 to each other. The fixing means 20 includes a first restricting member 21, a second restricting member 22, a linear member 23, and a tension generator 29. Further, as described above, in the outer ring 3, a plurality of through holes 17 are formed at predetermined intervals in the circumferential direction. In the present embodiment, the fixing means 20 is provided for each through hole 17. Moreover, the linear member 23 of this embodiment consists of a wire of a steel wire. Hereinafter, the linear member 23 will be described as a wire 23a.

Each of the first restriction member 21 and the second restriction member 22 is made of steel, and is attached to the openings 24 and 25 on both outer sides in the axial direction of the through hole 17.
More specifically, the first restricting member 21 is attached to the split wheel 11 at the opening 24 at the end in the axial direction of the hole 15 in a state where movement in the axially inner side is restricted. The second restricting member 22 is attached to the split wheel 12 at the opening 25 at the axial end of the hole 16 in a state where movement in the axially inner side is restricted. The axially inner side is the axially central side of the through-hole 17 (the mating surface side of the split wheels 11 and 12).

In FIG. 2, in the present embodiment, the first restricting member 21 and the second restricting member 22 have the same shape, and both the first restricting member 21 and the second restricting member 22 are outer circumferences composed of tapered surfaces 26 and 27. A plug member having a surface. And this taper surface 26 (27) is smaller in diameter in the axial direction inner side m than the opening part 24 (25) of the through-hole 17, and is larger in diameter in the axial direction outer side n than the opening part 24 (25).
According to this configuration, each of the first restricting member 21 and the second restricting member 22 is inserted into the openings 24 and 25 in a state in which a part thereof is inserted into each of the axially outer sides of the through hole 17, and the axial direction Inward movement is restricted. That is, the first restricting member 21 and the second restricting member 22 are restrained in the axial position with respect to the split wheels 11 and 12.

  Each of the first restricting member 21 and the second restricting member 22 has a bottomed tubular shape, and is formed integrally with the tubular portion 31 provided on the axially outer side of the tubular portion 31 and the tubular portion 31. And a lid 32. A hole 32 a through which the wire 23 a passes is formed in the lid portion 32, and the wire 23 a passes through the cylindrical portion 31. Further, the wire 23 a is located along the center line of the cylindrical portion 31.

  A tension generating portion 29 is mounted on the lid portion 32 of the first regulating member 21, and one end portion of the wire 23 a is attached to the tension generating portion 29. And the fixing | fixed part 28 is provided in the cover part 32 of the 2nd control member 22, and this fixing | fixed part 28 is fixing and fixing the other end part of the wire 23a. Thereby, the wire 23 a is configured to be provided between the first restricting member 21 and the second restricting member 22 in the through hole 17. The wire 23 a is disposed along the center line of the through hole 17.

The tension generator 29 of the present embodiment is a winch that can wind up the wire 23a. Hereinafter, the tension generator 29 will be described as a winch 29a. The winch 29a may be a manual type or an electric type.
The winch 29a includes a drum 30a that winds the wire 23a, and a support base 30b that is fixed to the lid portion 32 and supports the drum 30a. One end of the wire 23a is fixed to the drum 30a to prevent it from coming off, and the other end of the wire 23a is fixed to the fixing part 28 as described above. For this reason, tension | tensile_strength can be produced in the wire 23a by rotating the drum 30a.

  And according to this winch 29a, the force of the axial direction which mutually approaches is provided with respect to the 1st control member 21 and the 2nd control member 22 by producing it, making tension | tensile_strength increase gradually to the wire 23a. Can do. Further, by constraining the rotation of the drum 30a, the wound wire 23a can be held in that state, the tension of the wire 23a is maintained, and the first and second regulating members 21 and 22 are maintained. It is possible to maintain the axial force applied to each other and approaching each other.

  A method of fixing the outer ring 3 by the outer ring 3 fixing structure having the above configuration will be described. This fixing method is included in the temporary assembly method of the rolling bearing 1. That is, the fixing method of the present embodiment is a method in which the balls 4 and 5 are interposed between the inner ring 2 of the rolling bearing 1 and the split rings 11 and 12 are fixed to each other in the outer ring 3 in FIG. is there.

The first restricting member 21 and the second restricting member 22 are attached to the both outer sides in the axial direction of the through-hole 17 in a state where the movement toward the inner side in the axial direction is restricted (a part is inserted).
In the through hole 17, the wire 23a provided between the first restricting member 21 and the second restricting member 22 is caused by the winch 29a while gradually increasing the tension. Thereby, it is possible to apply an axial force that causes the first restricting member 21 and the second restricting member 22 to approach each other.
With the axial force, the split wheels 11 and 12 are pressed against each other in the axial direction, and the split wheels 11 and 12 are fixed to form an integrated outer ring 3.

In this way, since the tension is generated while gradually increasing the tension on the wire 23a, the axial force for bringing the first restricting member 21 and the second restricting member 22 closer to each other is gradually applied. Thus, no impact is applied to the split ring, and no indentation is generated on the outer raceway surfaces 13 and 14 and the inner raceway surfaces 18 and 19.
And in the winch 29a, the tension | tensile_strength of the wire 23a can be maintained by hold | maintaining the wound wire 23a in the state, and the state which fixed the split wheels 11 and 12 is obtained.

  Further, since the drum 30a can be restrained at a predetermined rotational position in the winch 29a, the tension generated in the wire 23a can be adjusted. It becomes possible. For example, by increasing the tension, it is possible to adjust the axial distance between the outer raceway surfaces 13 and 14 to be narrowed, and the axial clearance in the temporary assembly of the rolling bearing 1 can be adjusted.

  Further, after the temporary assembly, for example, even when the outer raceway surfaces 13 and 14 need to be reworked, the tension of the wire 23a is released by the winch 29a, and the first and second regulating members By removing 21 and 22, the split wheels 11 and 12 can be easily disassembled. Then, again, it is possible to easily re-fix the split wheels 11 and 12 by the fixing means 20 described above.

  FIG. 3 is an explanatory view for explaining another embodiment of the track ring (outer ring 3) fixing structure of the present invention. The difference from the embodiment of FIG. 1 is that the fixing means 20 according to the embodiment of FIG. 3 further includes a cylindrical member 35 provided in the through hole 17 (holes 15 and 16). It is. About another structure, it is the same as embodiment of FIG.

The cylindrical member 35 has a hollow cylindrical shape, and the wire 23 a passes through the cylindrical member 35. The cylindrical member 35 is inserted into the through hole 17 across the split wheels 11 and 12, and the outer peripheral surface of the cylindrical member 35 is in contact with the inner peripheral surface of the through hole 17.
That is, the cylindrical member 35 has a shape that is slightly shorter than the length obtained by subtracting the insertion length of the through hole 17 of the first restriction member 21 and the second restriction member 22 from the total length of the through hole 17 in the axial direction. The outer diameter of the cylindrical member 35 is substantially the same as the inner diameter of the through hole 17. For example, the cylindrical member 35 is in an intermediate fit state in the through hole 17.

The cylindrical member 35 is made of steel and contributes to the alignment of the split wheels 11 and 12 in the radial direction by being inserted into the through hole 17. That is, the cylindrical members 35 are inserted into the holes 15 and 16 with the split surfaces of the split wheels 11 and 12 interposed therebetween, so that the radial alignment between the split wheels 11 and 12 can be accurately performed. It can be carried out. The cylindrical member 35 has such a rigidity that this alignment is possible.
In the fixing method of the outer ring 3 in the embodiment having the cylindrical member 35, the cylindrical member 35 is first inserted into the through hole 17, and then the first and second regulating members 21 and 22 are inserted into the split ring 11, 12 is attached. The subsequent method is the same as in the above case.

  FIG. 4 is an explanatory view for explaining still another embodiment of the bearing ring fixing structure. In the embodiment of FIG. 4, among the inner ring 102 and the outer ring 103 that are raceways, the inner ring 102 includes divided wheels 111 and 112 that are divided in the axial direction. A hole 115 penetrating in the axial direction is formed in the first split ring 111, and a hole 116 penetrating in the axial direction is formed in the second split ring 112. These holes 115 and 116 form a through hole 17 that linearly penetrates the inner ring 102.

  As in the embodiment of FIG. 1, this fixing structure includes a fixing means 20 that fixes the split wheels 111 and 112 in a state where the split wheels 111 and 112 are pressed against each other in the axial direction. The fixing means 20 has the same configuration as that of the embodiment of FIG. That is, it has the 1st control member 21, the 2nd control member 22, the linear member 23 (wire 23a), and the tension generation part 29 (winch 29a), and each part has the same function. In the case of FIG. 1, the fixing means 20 is applied to the outer ring 3, but in FIG. 4, it is applied to the inner ring 102.

And also in this embodiment of FIG. 4, since the tension | tensile_strength is produced in the wire 23a between the 1st control member 21 and the 2nd control member 22, it produces | generates the split rings 111 and 112 each other. When fixing, the split ring is not impacted as in the prior art, and no indentation is generated on the outer raceway surfaces 13 and 14 and the inner raceway surfaces 18 and 19.
And in the winch 29a, the tension | tensile_strength of the wire 23a can be maintained by hold | maintaining the wound wire 23a in the state, and the state which fixed the split rings 111 and 112 is obtained.
Also in the embodiment of FIG. 4, a cylindrical member 35 similar to that of the embodiment of FIG. 3 may be provided.

  In each of the above embodiments, the case where the winch 29a is mounted on the first restricting member 21 and the fixing portion 28 is provided on the second restricting member 22 has been described. However, the winch 29a (tension generating portion 29) is replaced by the first restricting member. 21 and the second regulating member 22 may be mounted. In this case, by winding the wire 23a from both sides in the axial direction, tension can be generated in the wire 23a, and the position of the split ring can be adjusted from both sides in the axial direction.

In addition, a plurality of through holes 17 are formed at predetermined intervals in the circumferential direction, and the case where the fixing means 20 is provided for each through hole 17 has been described. However, the fixing means 20 is not provided in all the through holes 17. May be.
Moreover, in order to attach the fixing means 20 to the split wheels 11 and 12, the holes 15 and 16 may be formed in the split wheels 11 and 12, and complicated processing is unnecessary.

  Further, in each of the embodiments described above, the case where the outer peripheral surfaces of both the first restricting member 21 and the second restricting member 22 are tapered surfaces 26 and 27 has been described, but even if only one restricting member is a tapered surface. Good. In this case, the other restricting member is not shown, but has a smaller diameter than the opening of the through-hole 17 and can be inserted into the opening, and has a larger diameter than the opening and is latched on the end face of the split ring. It may be a stepped plug member having a flange portion.

Although the linear member 23 has been described as the wire 23a, the linear member 23 may be another member (for example, a shaft member), and may be any elongated member that can pass through the through hole 17. Further, the tension generator 29 may be other than the winch 29a.
The fixing structure of the raceway ring according to the present invention is not limited to the illustrated form, but may be other forms within the scope of the present invention.

  2: inner ring (track ring) 3: outer ring (track ring) 11, 12: split ring 17: through hole 20: fixing means 21: first regulating member 22: second regulating member 23: linear member 23a: wire 24, 25: Opening part 26, 27: Tapered surface 29: Tension generating part 29a: Winch 35: Tube member 102: Inner ring (track ring) 103: Outer ring (track ring) 111, 112: Split ring

Claims (5)

A bearing ring for a rolling bearing, which is composed of a plurality of divided rings divided in the axial direction and in which axial through holes are linearly formed;
Fixing means for fixing the split wheels as a state in which the split wheels are pressed against each other in the axial direction;
The fixing means includes
As a state in which movement inward in the axial direction is restricted, a first restriction member and a second restriction member attached to both sides of the through hole in the axial direction;
A linear member provided between the first regulating member and the second regulating member in the through hole;
And a tension generating section for applying an axial force that causes the first regulating member and the second regulating member to approach each other by generating tension on the linear member. Fixed structure.   One or both of the first restricting member and the second restricting member has a tapered surface whose inner diameter in the axial direction is smaller than the opening of the through hole and whose outer diameter in the axial direction is larger than the opening. The bearing ring fixing structure according to claim 1, wherein the structure is provided on a surface.   The said fixing | fixed means is further inserted in the said through-hole across the said division | segmentation wheel, and has further the cylindrical member which is contacting with the internal peripheral surface of the said through-hole. Bearing ring fixing structure.   The tension generating portion is mounted on one or both of the first restricting member and the second restricting member, and is capable of winding the linear member made of a wire and holding the wound wire in that state. The structure for fixing a bearing ring according to any one of claims 1 to 3, wherein the structure is a possible winch. A method of fixing a bearing ring for a rolling bearing comprising a plurality of divided rings divided in the axial direction and having axial through holes formed linearly,
As a state in which movement inward in the axial direction is restricted on both sides in the axial direction of the through hole, a first restriction member and a second restriction member are attached,
By causing the linear member provided between the first restricting member and the second restricting member in the through hole to generate while gradually increasing the tension, the first restricting member and the second restricting member are generated. Axial force is applied to the regulating member so as to approach each other,
A method for fixing track rings, wherein the split wheels are fixed to each other in a state where the split wheels are pressed against each other in the axial direction by the axial force.

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