JP2009156456A - Assembling method of rolling bearing - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an assembling method of a rolling bearing capable of being easily assembled in a short time even if a large rolling bearing equipped with a split type annular retainer is used. <P>SOLUTION: An annular member 122 formed of styrene foam is placed on an axial inner end surface of a first retainer 104 of an assembly body comprising an outer ring 105, a first inner ring 101, a first ball 103 and the annular first retainer 104, and an assembly comprising a second retainer 124 and a second ball 123 is placed on the annular member 122 on an opposite side from the first retainer 104. After that, a second inner ring 121 is assembled, and the annular member 122 is dissolved and removed by kerosene as wash oil, and the double-row ball bearing is assembled. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a method for assembling a rolling bearing, and more particularly to a method for assembling a rolling bearing suitable for use in assembling a large-diameter bearing for a swivel seat of a medical CT scan.

  Conventionally, in a method for assembling a large ball bearing having a split-type annular cage as described in JP 2000-329143 A (Patent Document 1), balls are arranged on the raceway surface of the outer ring, The cage is arranged so as to hold the ball, and then the inner ring is moved in the axial direction of the outer ring, and the ball is brought into contact with the raceway surface of the inner circumferential surface of the inner ring to assemble the ball bearing.

  Here, in the conventional assembly method described above, the position of the ball must be aligned with the position of the raceway surface on the inner peripheral surface of the outer ring immediately before the contact between the ball and the inner ring. I need it.

That is, in the conventional assembly method described above, it is difficult to adjust the position of the ball when the inner ring is installed, and it takes a lot of time and effort to adjust the position of the ball when installing the inner ring. Become.
JP 2000-329143 A

  Accordingly, an object of the present invention is to provide a method for assembling a rolling bearing that can be assembled easily and in a short time even for a large-sized rolling bearing having a split-type annular cage.

In order to solve the above-mentioned problem, the rolling bearing assembly method of the present invention is
An elastic body disposing step of disposing an elastic body having elasticity on a circumferential surface having a raceway surface of the first bearing ring or at a position facing the circumferential surface in a radial direction;
After that, the plurality of rolling elements held by the cage or the cage holding the plurality of rolling elements are brought into contact with the elastic body so that the plurality of rolling elements are substantially on the raceway surface. A rolling element arrangement step for positioning,
Thereafter, the second track ring assembly is assembled to the first track ring, the plurality of rolling elements, and the cage so that the plurality of rolling elements are brought into contact with the raceway surface of the second track ring. Attaching process,
And an elastic body moving step of moving at least a part of the elastic body from a position where the elastic body is arranged in the elastic body arranging step.

  According to the present invention, in the elastic body arranging step, the elastic body having elasticity is arranged on the circumferential surface having the raceway surface of the first bearing ring or at a position facing the circumferential surface in the radial direction, and thereafter, the rolling body is rolled. In the moving body arranging step, the second race ring is moved to the first raceway in a state where the plurality of rolling bodies or the cage is brought into contact with the elastic body and the plurality of rolling bodies are positioned substantially on the raceway surface. Since it is assembled to the wheel, the plurality of rolling elements and the cage, the relative position of the rolling element with respect to the raceway surface of the first raceway is almost changed during the assembly work of the second raceway assembly process. Therefore, the second race can be easily and quickly assembled to the first race, the plurality of rolling elements and the cage. Therefore, the production cycle time of the rolling bearing can be shortened.

In one embodiment,
The elastic body is a ring-shaped rubber tube,
In the elastic body arranging step, the rubber tube is arranged at a position facing a radial shoulder of the orbital shoulder connected to the orbital surface of the peripheral surface,
In the rolling element arrangement step, the axial end surface of the cage is brought into contact with the rubber tube in the axial direction of the rubber tube,
In the elastic body moving step, the rubber tube is extracted from the opposite side of the track shoulder to the track surface side in the axial direction of the first track ring.

  In this embodiment, in the rolling bearing, when there is an opening on the side opposite to the raceway surface side of the raceway shoulder in the axial direction of the first race ring (in the specification of installing the seal member, the seal member is installed). Assuming that there is an opening in a state that is not.

  According to the above embodiment, the ring-shaped rubber tube is disposed at a position facing the shoulder of the raceway that is continuous with the raceway surface on the circumferential surface of the first raceway ring, and the axial end face of the cage is the ring. Since the support is supported by the rubber tube, the rolling element can be stably positioned on the raceway surface of the first raceway in the assembly work. Therefore, the second track ring can be easily and quickly assembled to the first track ring, the plurality of rolling elements and the cage.

  Moreover, according to the said embodiment, the said rubber tube can be rapidly and easily extracted from a rolling bearing from the opposite side to the said track surface side of the said track shoulder part in the axial direction of a 1st track ring.

In one embodiment,
The elastic body is a ring-shaped rubber tube,
In the elastic body arranging step, the rubber tube is arranged at a position facing a radial shoulder of the orbital shoulder connected to the orbital surface of the peripheral surface,
In the rolling element arrangement step, the axial end surface of the cage is brought into contact with the rubber tube in the axial direction of the rubber tube,
In the elastic body moving step, the rubber tube is extracted from a side opposite to the first race ring side with respect to the position where the elastic body is arranged in the elastic body arranging step in the radial direction of the second race ring. .

  In this embodiment, in the middle of assembling the second track ring, a member or the like is present on the rubber tube side in the axial direction of the second track ring, and the second track ring is completely assembled. Later, it is assumed that the rubber tube cannot be removed from the inside of the bearing to the outside of the bearing.

  According to the above embodiment, the ring-shaped rubber tube is disposed at a position facing the shoulder of the raceway that is continuous with the raceway surface on the circumferential surface of the first raceway ring, and the axial end face of the cage is the ring. Since the support is supported by the rubber tube, the rolling element can be stably positioned on the raceway surface of the first raceway in the assembly work. Therefore, the second track ring can be easily and quickly assembled to the first track ring, the plurality of rolling elements and the cage.

  Further, according to the embodiment, the rubber tube is opposite to the first track ring side with respect to the position where the elastic body is disposed in the elastic body arranging step in the radial direction of the second track ring. Can be removed from the side.

In one embodiment,
The elastic body is a solid member made of a material that is dissolved by a solvent,
In the elastic body arranging step, the solid member is arranged at a position opposed to the orbit shoulder portion continuous with the orbit surface of the peripheral surface in the radial direction,
In the rolling element arranging step, the axial end face of the cage is brought into contact with the solid member,
In the elastic body moving step, the solid member is dissolved in the solvent and then removed together with the solvent.

  According to the above embodiment, since the solid member is made of a material having a property of being dissolved in a solvent, the solid member is solid after the first race ring, the second race ring, the plurality of rolling elements and the cage are assembled. Even when the member cannot be taken out from the inside of the bearing, the solid member can be melted in the solvent and simply taken out of the bearing as a liquid simply by injecting the solvent into the bearing.

  Therefore, after the first race ring, the second race ring, the plurality of rolling elements and the cage are assembled, the elastic body cannot be taken out from the inside of the bearing, and just before the second race ring is completely assembled. Further, it is not necessary to perform an operation requiring skill to extract the elastic body, and even a person who does not require skill can easily extract the elastic body (in this case, a solid member).

  Also, in the production site of bearings, washing oil (kerosene) is usually used to wash the bearings that are products. For example, the solid member has the property of being dissolved with washing oil. In the case of forming with polystyrene foam, washing oil can be used as a solvent. Therefore, in this case, the solid member can be dissolved and removed simultaneously in the cleaning step. Therefore, there is no need to provide a new process for dissolving the fixed member, and the solid member can be easily and inexpensively removed from the bearing.

In one embodiment,
The elastic body is a lubricant having viscoelasticity,
In the elastic body arranging step, the lubricant is applied to the raceway surface of the first race ring,
In the rolling element arranging step, the plurality of rolling elements are brought into contact with the lubricant, and the plurality of rolling elements are held on the raceway surface of the first race ring by the viscoelasticity of the lubricant,
In the elastic body moving step, the second race ring is rotated relative to the first race ring, the rolling element is rotated and revolved, and the lubricant is removed from the raceway surface of the first race ring. Move the excess part of it.

  According to the above embodiment, the elastic body for supporting the rolling element on the raceway surface is a lubricant (for example, grease). Therefore, after assembling the rolling bearing, the elastic body is attached to the raceway surface or the rolling surface. It can be used to lubricate sliding parts such as the surface of moving objects. Therefore, there is no problem even if the elastic body remains in the rolling bearing, and surplus in the lubricant applied to the raceway surface due to the rotation and revolution of the rolling element when the assembled rolling bearing is used. The part can be moved to another sliding part in the bearing.

  According to the rolling bearing assembling method of the present invention, the elastic body having elasticity is arranged on the circumferential surface having the raceway surface of the first bearing ring or at the position facing the circumferential surface in the radial direction, and then held. In a state where a plurality of rolling elements are held in a cage, a plurality of rolling elements or a cage are brought into contact with the elastic body, and the plurality of rolling elements are positioned substantially on the raceway surface. Since the wheel is assembled to the first race ring, the upper plurality of rolling elements and the cage, the second race ring is assembled to the first race ring, the plurality of rolling elements and the cage. The relative position of the rolling element with respect to the raceway surface of the first track ring hardly changes, and the second track ring can be easily and quickly assembled to the first track ring, the plurality of rolling elements and the cage. . Therefore, the production cycle time of the rolling bearing can be shortened.

  In particular, even if the rolling bearing to be assembled is a large rolling bearing such as a large-diameter bearing for a swivel seat of a medical CT scan, the rolling bearing can be easily and quickly installed without requiring skill. It can be assembled and the cycle time of rolling bearing production can be shortened.

  Hereinafter, the present invention will be described in detail with reference to the drawings.

  FIGS. 1A to 1D are views in the middle of assembling a double-row rolling bearing (double-row ball bearing) having two inner rings (first inner ring 1 and second inner ring 21) and one outer ring 5. FIG.

  For the assembly of the double row rolling bearing, the rolling bearing assembly method of the first embodiment of the present invention and the rolling bearing assembly method of the second embodiment of the present invention are used.

  Specifically, the double row rolling bearing is assembled as follows.

  First, referring to FIG. 1A, a large diameter in the axial direction of the first inner ring 1 of a double-row angular ball bearing as an example of a first bearing ring is placed on the mounting surface 14 that extends in the horizontal direction, which is the upper surface of the assembly table 45. The end face 15 on the side is placed, and then the elastic body arranging step of the rolling bearing assembling method of the first embodiment is performed. In this elastic body arranging step, the ring-shaped rubber tube 2 as an example of the elastic body is arranged so as to abut on the end face on the large-diameter side in the axial direction on the placement surface 14 and the outer peripheral surface of the first inner ring 1. To do. In other words, the rubber tube 2 is disposed on the outer circumferential surface of the first inner ring 1 at a position facing the raceway shoulder portion continuous with the raceway groove 17 as the raceway surface of the first inner ring 1 in the radial direction. Specifically, the ring-shaped rubber tube 2 is formed in a C shape in which one ring-shaped portion is cut in the circumferential direction of the first inner ring 1. The rubber tube 2 has a hollow structure, and the cross-sectional shape of the rubber tube 2 is an annular shape. Detachment members 31a and 31b each having a smaller cross section than that of the rubber tube 2 are attached to both sides of the cut circumferential direction.

  Then, the rolling element arrangement | positioning process of the assembly method of the rolling bearing of 1st Embodiment is performed. In this rolling element arranging step, in the state where the plurality of balls 3 as an example of the plurality of rolling elements are held by the split-type annular first resin holder 4, the axial direction of the first holder 4 The end face 16 on one side is brought into contact with the rubber tube 2 in the axial direction of the rubber tube 2, and as shown in FIG. 1A, the plurality of first balls 3 are used as the raceway surface of the first inner ring 1. It is positioned approximately on the groove 17. Part of the detaching members 31a and 31b is positioned so as to come out from the outer periphery of the end surface 36 on the assembly base side of the outer ring 5 to be assembled in the subsequent second bearing ring assembling step.

  Then, the 2nd track ring assembly | attachment process of the assembly method of the rolling bearing of 1st Embodiment is performed. In this second race ring assembly step, as shown in FIG. 1B, one race groove (corresponding to the raceway surface of the second race ring) of the outer ring 5 having a double row raceway groove as an example of the second race ring. ) 18 is brought into contact with a plurality of first balls 3.

  Then, the elastic body moving process of the assembly method of the rolling bearing of 1st Embodiment is performed. In this elastic body moving step, the rubber tube 2 is pulled in the axial direction of the first inner ring 1 as the first race ring by pulling the detaching members 31 a and 31 b, and the race groove 17 in the race shoulder portion of the first inner ring 1. Remove from the opposite side. Thereafter, the outer ring 5 is moved so that one raceway groove 18 of the outer ring 5 and the raceway groove 17 of the first inner ring 1 are closer to each other, and as shown in FIG. 3 and the assembly of the outer ring 5 to the first cage 4 is completed. The reason why the removal members 31a and 31b and the rubber tube 2 are drawn by dotted lines is that when the assembly of the outer ring 5 to the first inner ring 1, the plurality of balls 3 and the first retainer 4 is completed as shown in FIG. 1B. This is because the removal members 31a and 31b and the rubber tube 2 have already been removed, and the removal members 31a and 31b and the rubber tube 2 are not actually present in FIG. 1B.

  Then, the elastic body arrangement | positioning process of the assembly method of the rolling bearing of 2nd Embodiment is performed. In this elastic body arranging step, as shown in FIG. 1C, the axially inward side of the outer ring 5 (corresponding to the second bearing ring in the first embodiment) corresponding to the first bearing ring in the second embodiment. A ring-shaped rubber tube 22 as an example of an elastic body is placed on the end surface 29 of the first cage 4 located at the position so that the axial direction of the first cage 4 and the axial direction of the rubber tube 22 substantially coincide. To place. In other words, the rubber tube 22 is connected to the track shoulder portion (the track shoulder portion on the first track groove 18 side of the second track groove 28) that is continuous with the second track groove 28 on the inner peripheral surface of the outer ring 5 corresponding to the first track ring. ) In a position opposite to the radial direction. In detail, the ring-shaped rubber tube 22 is formed in a C shape in which one ring-shaped portion is cut in the circumferential direction of the outer ring 5. The rubber tube 22 has a hollow structure, and the cross-sectional shape of the rubber tube 22 is an annular shape. Detachment members 51 a and 51 b each having a smaller cross section than that of the rubber tube 22 are attached to both sides of the cut circumferential direction.

  Then, the rolling element arrangement | positioning process of the assembly method of the rolling bearing of 2nd Embodiment is performed. In this rolling element arrangement step, as shown in FIG. 1C, in a state where a plurality of second balls 23 as an example of a plurality of rolling elements are held by a split-type annular resin second cage 24. Then, the end surface of the second cage 24 in the axial direction is brought into contact with the rubber tube 22 in the axial direction of the rubber tube 22 so that the plurality of second balls 23 are substantially positioned on the second raceway groove 28 of the outer ring 5. Part of the detaching members 51a and 51b is positioned so as to come out from the inner periphery of the end surface 36 on the assembling table side of the second inner ring 21 to be assembled in the subsequent second bearing ring assembling step.

  Then, the 2nd bearing ring assembly | attachment process and elastic body moving process of the assembly method of the rolling bearing of 2nd Embodiment are performed. In the two race ring assembly step and the elastic body moving step, as shown in FIG. 1D, the second balls 23 are brought into contact with the race grooves 38 of the second inner race 21 as the second race ring. 2 The inner ring 21 is moved from the outside on the second raceway groove 28 side in the axial direction of the outer ring 5 to the first raceway groove 18 side of the outer ring 5 in the axial direction, and the plurality of second balls 23 are moved by the second inner ring 21. Is supported by the second inner ring 21 and the plurality of second balls 23 are not detached from the second raceway groove 28, the rubber tube 22 is elastically deformed by pulling the removal members 51a and 51b, The second inner ring 21 is extracted from the opposite side to the outer ring 5 side in the radial direction, that is, from the radially inner side. Thereafter, the second inner ring 21 is moved to the outer ring 5, the plurality of second balls 23, and the second cage 24 so that the plurality of second balls 23 come into contact with the raceway groove 38 of the second inner ring 21. Assemble and complete the assembly of the double row rolling bearing.

  According to the rolling bearing assembly method of the first embodiment, in the elastic body arranging step, the rubber tube is disposed at a position facing the outer peripheral surface having the raceway groove 17 of the first inner race 1 as the first raceway in the radial direction. 2 and then, in the rolling element arranging step, the first cage 4 is brought into contact with the rubber tube 2 and the plurality of first balls 3 are substantially positioned on the raceway groove 17 in the state where Since the outer ring 5 as the two race rings is assembled to the first inner ring 1, the plurality of first balls 3 and the first retainer 4, the second race is assembled during the assembly process of the second race ring assembly process. The relative position of the first ball 3 with respect to the raceway groove 17 of the inner ring 1 hardly changes, and the outer ring 5 can be easily and quickly moved to the first inner ring 1, the plurality of first balls 3, and the first cage. 4 can be assembled. Therefore, it is possible to shorten the cycle time of production of the double row rolling bearing.

  Further, according to the rolling bearing assembly method of the first embodiment, the rubber tube 2 can be quickly and easily attached from the opposite side of the raceway shoulder to the raceway groove 17 side in the axial direction of the first inner ring 1. Can be removed.

  Further, according to the rolling bearing assembly method of the second embodiment, in the elastic body arranging step, the roller bearing is positioned at a position facing the inner circumferential surface having the second raceway groove 28 of the outer ring 5 as the first raceway in the radial direction. The rubber tube 22 is disposed, and then, in the rolling element disposing step, the second cage 24 is brought into contact with the rubber tube 22 and the plurality of second balls 23 are substantially positioned on the track groove 28. Since the second inner ring 21 as the second track ring is assembled to the outer ring 5, the plurality of second balls 23 and the second cage 24, during the assembly work of the second track ring assembly step, The relative position of the second ball 23 with respect to the raceway groove 28 of the outer ring 5 hardly changes, and the second inner ring 21 can be easily and quickly moved to the outer ring 5, the plurality of second balls 23, and the second cage 24. Can be assembled. Therefore, it is possible to shorten the cycle time of production of the double row rolling bearing.

  Further, according to the rolling bearing assembly method of the second embodiment, the rubber tube 22 is arranged in the radial direction of the second inner ring 21 with respect to the position where the rubber tube 22 is arranged in the elastic body arranging step. Can be removed from the other side.

  2A to 2D are views in the middle of assembling a double-row rolling bearing (double-row ball bearing) having two inner rings (first inner ring 101 and second inner ring 121) and one outer ring 105. FIG.

  For the assembly of the double row rolling bearing, the rolling bearing assembling method of the first embodiment and the rolling bearing assembling method of the third embodiment of the present invention are used.

  Specifically, a double row rolling bearing is assembled as follows.

  First, referring to FIG. 2A, a large diameter in the axial direction of the first inner ring 101 of the double-row angular ball bearing as an example of the first raceway ring is placed on the mounting surface 114 that extends in the horizontal direction, which is the upper surface of the assembly table 145. The end face 115 on the side is placed, and then the elastic body arranging step of the rolling bearing assembling method of the first embodiment is performed. In this elastic body arranging step, the ring-shaped rubber tube 102 as an example of the elastic body is arranged so as to abut on the end face on the large-diameter side in the axial direction on the placement surface 114 and the outer peripheral surface of the first inner ring 101. To do. In other words, the rubber tube 102 is disposed on the outer peripheral surface of the first inner ring 101 at a position facing the track shoulder that is continuous with the track groove 117 as the track surface of the first inner ring 101 in the radial direction. Specifically, the ring-shaped rubber tube 102 is formed in a C shape in which one ring-shaped portion is cut in the circumferential direction of the first inner ring 101. The rubber tube 102 has a hollow structure, and the cross-sectional shape of the rubber tube 102 is an annular shape. Detachment members 131a and 131b each having a smaller cross section than that of the rubber tube 102 are attached to both sides of the cut circumferential direction.

  Then, the rolling element arrangement | positioning process of the assembly method of the rolling bearing of 1st Embodiment is performed. In this rolling element arranging step, in the state where the plurality of balls 103 as an example of the plurality of rolling elements are held by the split-type annular first resin cage 104, the first cage 104 is arranged in the axial direction. The end surface 116 on one side is brought into contact with the rubber tube 102 in the axial direction of the rubber tube 102, and as shown in FIG. 2A, the plurality of first balls 103 are used as the track surface of the first inner ring 101 as a track surface. It is positioned approximately on the groove 117. Part of the detaching members 131a and 131b is positioned so as to come out from the outer periphery of the end surface 136 on the assembly base side of the outer ring 105 to be assembled in the subsequent second race ring assembly step.

  Then, the 2nd track ring assembly | attachment process of the assembly method of the rolling bearing of 1st Embodiment is performed. In this second race ring assembly step, as shown in FIG. 2B, one race groove (corresponding to the raceway surface of the second race ring) of the outer ring 105 having double rows of race grooves as an example of the second race ring. ) 118, a plurality of first balls 103 are brought into contact with each other.

  Then, the elastic body moving process of the assembly method of the rolling bearing of 1st Embodiment is performed. In this elastic body moving step, the rubber tube 102 is pulled in the axial direction of the first inner ring 101 as the first race ring by pulling the removal members 131a and 131b, and the race groove 117 in the race shoulder portion of the first inner ring 101. Remove from the opposite side. Thereafter, the outer ring 105 is moved so that one raceway groove 118 of the outer ring 105 and the raceway groove 117 of the first inner ring 101 are closer to each other, and as shown in FIG. 2B, the first inner ring 101 and the plurality of balls are moved. 103 and the assembly | attachment of the outer ring | wheel 105 to the 1st holder | retainer 104 are completed. The reason why the removal members 131a and 131b and the rubber tube 102 are drawn by dotted lines is that when the assembly of the outer ring 105 to the first inner ring 101, the plurality of balls 103 and the first retainer 104 is completed as shown in FIG. 2B. This is because the detaching members 131a and 131b and the rubber tube 102 have already been extracted, and the detaching members 131a and 131b and the rubber tube 102 are not actually present in FIG. 2B.

  Then, the elastic body arrangement | positioning process of the assembly method of the rolling bearing of 3rd Embodiment is performed. In this elastic body arranging step, as shown in FIG. 2C, the axially inner side of the outer ring 105 (corresponding to the second bearing ring in the first embodiment) corresponding to the first bearing ring in the third embodiment. An annular member 122 made of foamed polystyrene as an example of a solid member made of a material that is dissolved by a solvent is placed on the end surface 129 of the first cage 104 positioned at the position of the first cage 104 and the annular member. It arrange | positions so that the axial direction of 122 may substantially correspond. In other words, the annular member 122 is connected to the second shoulder groove 128 on the inner peripheral surface of the outer ring 105 corresponding to the first race ring (the first shoulder groove 118 side of the second race groove 128 on the first race groove 118 side). ) In a position opposite to the radial direction.

  Then, the rolling element arrangement | positioning process of the assembly method of the rolling bearing of 3rd Embodiment is performed. In this rolling element arrangement step, as shown in FIG. 2C, in a state where a plurality of second balls 123 as an example of a plurality of rolling elements are held by a split-type annular resin second cage 124. Then, the end surface of the second cage 124 in the axial direction is brought into contact with the annular member 122 in the axial direction of the annular member 122, and the plurality of second balls 123 are substantially positioned on the second raceway groove 128 of the outer ring 105.

  Then, the 2nd track ring assembly | attachment process of the assembly method of the rolling bearing of 3rd Embodiment is performed. In this second bearing ring assembly step, the second inner ring 121 is moved in the axial direction of the outer ring 105 so that the plurality of second balls 123 are brought into contact with the raceway groove 138 of the second inner ring 121 as the second bearing ring. The second raceway 128 is moved from the outer side toward the first raceway groove 118 side of the outer ring 105 in the axial direction, so that the plurality of second balls 123 come into contact with the raceway groove 138 of the second inner ring 121. The two inner rings 121 are assembled to the outer ring 105, the plurality of second balls 123, and the second cage 124. In this state, the annular member 122 exists in the bearing.

  Then, the elastic body moving process of 3rd Embodiment is performed. In this elastic body moving step, the double row rolling bearing including the annular member 122 is washed with kerosene, which is a washing oil as an example of a solvent, and the annular member 122 is melted with the kerosene, and the annular member 122 dissolved in the kerosene. Is removed with kerosene. In this way, the assembly of the double row rolling bearing is completed.

  According to the method of assembling the rolling bearing of the third embodiment, the annular member 122 as the solid member is made of foamed polystyrene, which is a material having the property of being dissolved by kerosene, and therefore the outer ring 105 and the second inner ring 121. In the case of the third embodiment in which the annular member 122 cannot be taken out from the inside of the bearing after the plurality of second balls 123 and the second cage 124 are assembled, kerosene which is a solvent in the bearing. Can be easily taken out of the bearing as a liquid by melting the annular member 122 into kerosene.

  Therefore, after the outer ring 105, the second inner ring 121, the plurality of second balls 123, and the second cage 124 are assembled, the annular member 122 cannot be taken out from the inside of the bearing. However, unlike the second embodiment, there is no need to perform the work of removing the rubber tube 22 just before the second inner ring 21 is completely assembled, and the distance between the first inner ring 101 and the second inner ring 121 is particularly small. Even when it is difficult to extract the rubber tube, the elastic body (in the case of the third embodiment, the annular member 122 made of foamed polystyrene) can be easily extracted.

  Also, in the production site of bearings, washing oil (kerosene) is usually used to wash the bearings that are the product. However, as in the third embodiment, the solid member is dissolved with kerosene. In the case of forming with a polystyrene foam having such properties, cleaning kerosene can be used as a solvent. Therefore, in this case, the annular member 122 as the solid member can be simultaneously dissolved and removed in the cleaning step. Therefore, since it is not necessary to provide a new process for dissolving the annular member 122, the annular member 122 can be easily and inexpensively removed from the bearing.

  2A to 2D, the double-row rolling bearing is assembled using the rolling bearing assembly method of the first embodiment and the rolling bearing assembly method of the third embodiment. In this invention, in the manufacturing method shown in FIGS. 2A to 2D, the rubber tube 102 is replaced with an annular member made of foamed polystyrene, and the annular member made of foamed polystyrene is not removed, and finally, made of foamed polystyrene. The annular member 122 may be dissolved and removed with kerosene or gasoline as washing oil (that is, two annular members made of polystyrene foam may be dissolved and removed simultaneously with kerosene or gasoline as washing oil. Is also good).

  In the method for assembling the rolling bearing of the third embodiment, kerosene is used as a solvent, and foamed polystyrene is used as a material that is dissolved by the solvent. However, gasoline is used as a solvent and a material that is dissolved by the solvent is used. Fired polystyrene may be used. Further, hydrocarbon oil may be used as a solvent, and foamed polystyrene may be used as a material that is dissolved by the solvent. Further, thinner (such as lacquer thinner or urethane thinner) may be used as the solvent. As the solvent, an organic solvent can be used for dissolving a wide range of materials.

  3A to 3D are views in the middle of assembling a double-row rolling bearing (double-row ball bearing) having two inner rings (first inner ring 201 and second inner ring 221) and one outer ring 205. FIG.

  The assembly method of the rolling bearing according to the fourth embodiment of the present invention is used for assembling the double row rolling bearing.

  Specifically, the double row rolling bearing is assembled as follows.

  First, a 1st elastic body arrangement | positioning process is performed. Referring to FIG. 3A, in this first elastic body arranging step, grease 202, which is a viscoelastic body as an example of an elastic body, is provided in the raceway groove 217 as the raceway surface of the first inner ring 201 as the first raceway ring. Apply.

  Then, a 1st rolling element arrangement | positioning process is performed. In the first rolling element arrangement step, the plurality of first balls 203 are brought into contact with the grease 202 in a state where the plurality of first balls 203 are held by the annular first resin holder 204, The plurality of first balls 203 are positioned substantially on the track groove 217. Here, due to the viscosity of the grease 202, the plurality of first balls 203 are fixed to the grease 202 applied on the raceway groove 217 of the first inner ring 201 and are held on the raceway groove 217.

  Then, a 1st 2nd ring assembly process is performed. In this first second race ring assembly step, as shown in FIG. 3B, the outer ring 205 is moved so that the first balls 203 are brought into contact with the first race groove 218 of the outer race 205 as the second race ring. The first inner ring 201, the plurality of first balls 203, and the first cage 204 are assembled.

  Thereafter, the procedure from the elastic body arranging step to the second track ring assembling step is repeated.

  Specifically, first, the second elastic body arranging step is performed. Referring to FIG. 3C, in the second elastic body arranging step, grease 222, which is a viscoelastic body as an example of an elastic body, is applied to the second raceway groove 228 as the raceway surface of the outer ring 205 as the first raceway ring. To do. This grease 222 is the same grease as the grease 202.

  Then, a 2nd rolling element arrangement | positioning process is performed. In the second rolling element arranging step, in a state where the plurality of second balls 223 are held by the annular second resin cage 224, as shown in FIG. 3C, the plurality of second balls 223 are moved. The plurality of second balls 223 are positioned on the second raceway groove 228 of the outer ring 205 in contact with the grease 222. Here, due to the viscosity of the grease 222, the plurality of second balls 223 are fixed to the grease 222 applied on the second track groove 228 and held on the second track groove 228.

  Then, the 2nd 2nd ring assembly process is performed. In the second second race ring assembly step, as shown in FIG. 3D, the second inner ring 223 is brought into contact with the raceway groove 238 of the second inner race 221 as the second race ring. 221 is assembled to the outer ring 205, the plurality of second balls 223, and the second cage 224.

  Subsequently, in the first and second inner ring fixing steps in which the first and second inner ring fixing steps are performed, a screw (not shown) is passed through both the first inner ring 201 and the second inner ring 221 so as to pass through the first inner ring 201. And the 2nd inner ring 221 is fixed mutually.

  Thereafter, the elastic body moving step is performed. In this elastic body moving step, the first and second inner rings 201, 221 are rotated relative to the outer ring 205, and the first and second balls 203, 223 are rotated and revolved, so that the raceway grooves 217, 218, 228 are rotated. , 238 to move the excess portion of the grease 202, 222 to the other sliding portion in the rolling bearing. In this way, a double row rolling bearing is assembled.

  According to the assembly method of the rolling bearing of the third embodiment, the elastic bodies for supporting the first and second balls 203, 223 on the raceway grooves 217, 218, 228, 238 are greases 202, 222. Therefore, after assembling the rolling bearing, the elastic body can be used to lubricate sliding portions such as the raceway grooves 202 and 222 and the surfaces of the first and second balls 203 and 223. Therefore, there is no problem even if the elastic body remains in the bearing, and it is applied to the raceway grooves 217, 218, 228, and 238 by the rotation and revolution of the rolling element when the assembled rolling bearing is used. The excess portions of the greases 202 and 222 can be moved to other sliding portions in the bearing.

  In the rolling bearing assembly method of the third embodiment, greases 202 and 222 are used as elastic bodies. However, any elastic lubricant other than grease can be used as the elastic body. can do. Here, if it has the property of being washed away with washing oil, it may be removed with washing oil after assembly. In particular, when the greases 202 and 222 at the time of assembly are different from the greases at the time of use of the rolling bearing, when the greases 202 and 222 at the time of assembly and the grease at the time of use of the rolling bearing are mixed, softening or the like occurs. When the rolling bearing is insufficiently lubricated, it is necessary to sufficiently remove the grease at the time of assembly. Further, the viscous lubricant may be a rust inhibitor that can be used as a lubricant, or a rust inhibitor that can be used by being mixed in the lubricant.

  The rolling bearing assembly method according to the first to fourth embodiments is used for assembling rolling bearings whose rolling elements are balls 3, 23, 103, 123, 203, 223. The moving body may be used for assembling rolling bearings that are rolling elements other than balls such as cylindrical rollers and tapered rollers. The present invention may also be used for assembling double row rolling bearings in which rollers (conical rollers, cylindrical rollers, or spherical rollers) and balls are arranged adjacent to each other in the axial direction. It may be used for assembling rolling bearings arranged in rows (different types of rollers may be arranged in double rows).

It is a figure in the middle of assembling the double row rolling bearing (double row ball bearing) which has two inner rings and one outer ring using the 1st method. It is a figure in the middle of assembling the double row rolling bearing (double row ball bearing) which has two inner rings and one outer ring using the 1st method. It is a figure in the middle of assembling the double row rolling bearing (double row ball bearing) which has two inner rings and one outer ring using the 1st method. It is a figure in the middle of assembling the double row rolling bearing (double row ball bearing) which has two inner rings and one outer ring using the 1st method. It is a figure in the middle of assembling the double row rolling bearing (double row ball bearing) which has two inner rings and one outer ring using the 2nd method. It is a figure in the middle of assembling the double row rolling bearing (double row ball bearing) which has two inner rings and one outer ring using the 2nd method. It is a figure in the middle of assembling the double row rolling bearing (double row ball bearing) which has two inner rings and one outer ring using the 2nd method. It is a figure in the middle of assembling the double row rolling bearing (double row ball bearing) which has two inner rings and one outer ring using the 2nd method. It is a figure in the middle of assembling the double row rolling bearing (double row ball bearing) which has two inner rings and one outer ring using the 3rd method. It is a figure in the middle of assembling the double row rolling bearing (double row ball bearing) which has two inner rings and one outer ring using the 3rd method. It is a figure in the middle of assembling the double row rolling bearing (double row ball bearing) which has two inner rings and one outer ring using the 3rd method. It is a figure in the middle of assembling the double row rolling bearing (double row ball bearing) which has two inner rings and one outer ring using the 3rd method.

Explanation of symbols

1,101,201 First inner ring 2,22,102 Rubber tube 3,103,203 First ball 4,104,204 First cage 5,105,205 Outer ring 17,117,217 Track groove of first inner ring 18, 118, 218 Outer ring first raceway groove 21, 121, 221 Second inner ring 23, 123, 223 Second ball 28, 128, 228 Outer ring second raceway groove 38, 138, 238 Second inner ring raceway groove 122 Annular member made of polystyrene foam 202,222 Grease

Claims (5)

An elastic body disposing step of disposing an elastic body having elasticity on a circumferential surface having a raceway surface of the first bearing ring or at a position facing the circumferential surface in a radial direction;
After that, the plurality of rolling elements held by the cage or the cage holding the plurality of rolling elements are brought into contact with the elastic body so that the plurality of rolling elements are substantially on the raceway surface. A rolling element arrangement step for positioning,
Thereafter, the second track ring assembly is assembled to the first track ring, the plurality of rolling elements, and the cage so that the plurality of rolling elements are brought into contact with the raceway surface of the second track ring. Attaching process,
An assembly method of a rolling bearing, comprising: an elastic body moving step of moving at least a part of the elastic body from a position where the elastic body is arranged in the elastic body arranging step. The method of assembling a rolling bearing according to claim 1,
The elastic body is a ring-shaped rubber tube,
In the elastic body arranging step, the rubber tube is arranged at a position facing a radial shoulder of the orbital shoulder connected to the orbital surface of the peripheral surface,
In the rolling element arrangement step, the axial end surface of the cage is brought into contact with the rubber tube in the axial direction of the rubber tube,
In the elastic body moving step, a rolling bearing assembling method, wherein the rubber tube is extracted from a side opposite to the raceway surface side of the raceway shoulder in the axial direction of the first raceway ring. The method of assembling a rolling bearing according to claim 1,
The elastic body is a ring-shaped rubber tube,
In the elastic body arranging step, the rubber tube is arranged at a position facing a radial shoulder of the orbital shoulder connected to the orbital surface of the peripheral surface,
In the rolling element arrangement step, the axial end surface of the cage is brought into contact with the rubber tube in the axial direction of the rubber tube,
In the elastic body moving step, the rubber tube is extracted from a side opposite to the first race ring side with respect to the position where the elastic body is arranged in the elastic body arranging step in the radial direction of the second race ring. A method for assembling a rolling bearing. The method of assembling a rolling bearing according to claim 1,
The elastic body is a solid member made of a material that is dissolved by a solvent,
In the elastic body arranging step, the solid member is arranged at a position opposed to the orbit shoulder portion continuous with the orbit surface of the peripheral surface in the radial direction,
In the rolling element arranging step, the axial end face of the cage is brought into contact with the solid member,
In the elastic body moving step, the solid member is dissolved in the solvent and then removed together with the solvent. The method of assembling a rolling bearing according to claim 1,
The elastic body is a lubricant having viscoelasticity,
In the elastic body arranging step, the lubricant is applied to the raceway surface of the first race ring,
In the rolling element arranging step, the plurality of rolling elements are brought into contact with the lubricant, and the plurality of rolling elements are held on the raceway surface of the first race ring by the viscoelasticity of the lubricant,
In the elastic body moving step, the second race ring is rotated relative to the first race ring, the rolling element is rotated and revolved, and the lubricant is removed from the raceway surface of the first race ring. A method for assembling a rolling bearing, characterized in that an excess portion is moved.

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