JP2011219208A - Suspender for rolling bearing and assembling method of rolling bearing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a suspender for a rolling bearing capable of suspending the bearing without causing trouble in designing the rolling bearing and also without requiring additional process for an inner ring and an outer ring being an orbit ring, and an assembling method of rolling bearing using this suspender.SOLUTION: This is a suspender for suspending a rolling bearing whose constitution parts are an inner ring 2 having a track plane 2a at the circumference, an outer ring 3 having a track plane 3a at the inner periphery, a plurality of rolling elements 5 arranged between the track plane 2a of the inner ring 2 and the track plane 3a of the outer ring 3 in the circumferential direction, and a holder 6 arranged between the inner ring 2 and the outer ring 3 and housing the rolling element 5; a suspender 10 is composed of a fixing member 11 provided with a suspended ring 14 so as to be attached and a claw type member 12 fixed to the fixing member 11, a rolling bearing 1 is suspended by engaging the claw type member 12 to a plane facing to the axial direction of component of the rolling bearing 1.

Description

  The present invention relates to a rolling bearing suspension used for lifting a rolling bearing upward in the axial direction and a method of assembling a rolling bearing using the suspension.

  A large-sized rolling bearing used for a main shaft or the like of a wind power generator is lifted upward by a lifting tool and incorporated in a housing and a rotating shaft. As a method for lifting such a large rolling bearing, an axial hole is provided in the end face of the inner ring or outer ring of the rolling bearing, the hanging ring is inserted and fixed in this hole, and the lifting ring is lifted in the axial direction. It has been.

  For example, in Patent Document 1, a screw hole is provided in the end face of the inner ring of the bearing, and the suspension ring is screwed to the screw hole to lift in the axial direction. In Patent Document 2, when a bolt is inserted into an axial through hole formed in the outer ring and one end of the bolt is lifted in the axial direction, the nut attached to the other end of the bolt and the end surface of the inner ring are engaged in the axial direction. This lifts the bearing.

  In Patent Document 3, an engagement hole is provided in the outer diameter surface of the outer ring or the inner diameter surface of the inner ring, which is a race, and the small diameter portion formed on the distal end side of the screw portion provided in the sleeve of the lifting tool is engaged with the above-described engagement. By engaging with the hole, the bearing can be lifted upward.

JP 2006-329331 A JP 2007-263305 A JP 2009-133369 A

  In any conventional rolling bearing suspension, it is necessary to form a through hole, a screw hole, or an engagement hole in an inner ring or outer ring that is a race. However, if a through hole, a screw hole, or an engagement hole that can withstand the weight of a large-sized rolling bearing is formed in the raceway ring, the raceway ring is partially thinned, which may cause insufficient strength. For this reason, the diameter of a hole and the place to form are restrict | limited, and it will interfere with the design of an inner ring | wheel or an outer ring | wheel. Even if a through hole, a screw hole, and an engagement hole are provided in the raceway by design, additional processing for that is required, resulting in high costs.

  In addition, large-sized rolling bearings used for main shafts of wind power generators and the like have thin bearing rings and carburized products, and if screw holes are provided, cracking may occur. For this reason, the conventional method of providing a screw hole may not be able to achieve a sufficiently satisfactory design.

  The object of the present invention has been made in view of the above-mentioned problems. A rolling bearing is manufactured without hindering the design of the rolling bearing and without requiring additional processing on the inner ring and outer ring that are race rings. The present invention provides a lifting device for a rolling bearing that can be lifted, and a method for assembling a rolling bearing using the lifting device, and particularly a lifting device suitable for a rolling bearing such as a main shaft of a wind power generator, and the lifting device. The assembling method using is provided.

  The inventors of the present application, in response to the above-described problems of the prior art, do not perform any additional processing for the suspension on the inner ring or outer ring, which is a raceway, Preferably, by engaging the claw-shaped member of the lifting tool with the flange surface, and as a method of assembling the rolling bearing, by using the above-mentioned lifting tool and lifting it using the state of the preliminary assembly of the bearing components, We paid attention to the remarkable merit in both the design side of the bearing and the lifting and assembly work surface.

  The present invention includes an inner ring having a raceway surface on the outer periphery, an outer ring having a raceway surface on the inner periphery, and a plurality of rolling elements disposed in a circumferential direction between the raceway surface of the inner ring and the raceway surface of the outer ring, A lifting device for lifting a rolling bearing that is disposed between the inner ring and the outer ring and includes a cage that houses the rolling element as a component, and the lifting device is a fixing member to which a suspension ring can be attached And a claw-shaped member fixed to the fixing member, and this claw-shaped member is engaged with the axially facing surface of the component part of the rolling bearing.

  Even if it is a thin and carburized raceway ring that constitutes a large rolling bearing used for the main shaft of a wind power generator, etc., there is no risk of problems such as cracking due to the structure without screw holes, Further, in terms of design, it is not necessary to secure a space for the screw hole, so that the degree of freedom in designing the bearing is improved, and as a result, the rated load of the bearing can be secured. In addition, additional processing such as through holes and screw holes is not required, and costs can be reduced.

  The object to be lifted by engaging the claw-shaped members of the lifting tool can be a preliminary assembly composed of the inner ring, rolling elements and cage of the rolling bearing, or the inner ring or outer ring before assembly. In addition, when a double row tapered roller bearing or a double row automatic roller bearing is used, the claw-shaped member of the lifting tool is securely engaged with the small collar surface of the inner ring, and the lifting work of the rolling bearing that is heavy can be easily performed. And can be performed efficiently.

  By making the rolling bearing lifted by the lifting gear into a wind power generator bearing, the claw-shaped member of the lifting gear is securely engaged with the small brim surface of the inner ring, and the work of lifting the rolling bearing that is heavy to the ground is easy. And can be performed efficiently.

  Since the fixing member of the lifting tool is formed in an annular shape and abuts against the end surface of the inner ring, the fixing member is accurately positioned by the inner ring, and the protrusion of the claw-shaped member is securely engaged with the small collar surface of the inner ring. be able to.

  When the fixing member of the lifting tool has a hardness of HRC32 or higher, a lightweight lifting tool can be realized while securing the strength of the fixing member, and an increase in the material cost and the total lifting weight of the lifting tool can be suppressed.

  By adopting a structure in which the claw-shaped member of the hanger is engaged with the small brim surface of the inner ring, it is possible to mount the hanger without problems such as cracking even if the inner ring is carburized. Can be easily mounted and separated.

  Since the claw-shaped member of the hanger is shaped so as not to interfere with the cage and the rollers, and can be inserted from the small collar end surface side of the inner ring, the hanger can be easily mounted and separated.

  By making the engagement surface of the claw-shaped member of the lifting device into a medium-high shape, the engagement surface does not hit the small collar surface of the inner ring at the time of attaching and lifting the lifting tool, and the small collar surface is damaged. There is nothing.

  By making the hardness of at least the engaging surface of the claw-shaped member of the hanger lower than the hardness of the raceway ring, the brim surface is not damaged during the hanger mounting operation and lifting.

  Since three or more claw-shaped members of the lifting tool are arranged on the circumference of the fixing member, the lifting tool can be lifted in a balanced manner.

When the number of the nail-shaped members of the suspension satisfies the following relationship, the required strength can be ensured and a reliable suspension can be realized.
Total weight of lifting / (contact area between the engaging surface of the claw-shaped member and the bearing ring × number of arrangement) <yield stress of the claw-shaped member

  An oval through-hole for fixing a claw-shaped member of a lifting tool to a fixing member with a bolt, wherein the fixing member is provided with a screw hole and adjustable in the circumferential direction of the fixing member. Thus, regardless of the number of rollers, the odd number or the even number, etc., it is possible to insert the claw-shaped member so as not to interfere between the tapered rollers by adjusting the position of the claw-shaped member in the circumferential direction.

  The length that can be adjusted in the circumferential direction of the nail mold member of the hanger is set to 5 mm or more on both sides with respect to the center of the nail mold member, and the nail mold member is provided with a protrusion to be engaged with the fixing member. As a result, the strength of the claw-shaped member can be ensured and the moment around the bolt can be accommodated.

  A second aspect of the present invention includes an inner ring having a raceway surface on the outer periphery, an outer ring having a raceway surface on the inner periphery, and a plurality of circumferentially arranged between the raceway surface of the inner ring and the raceway surface of the outer ring. A method of assembling a rolling bearing comprising a rolling element and a retainer that is disposed between the inner ring and the outer ring and accommodates the rolling element, the step of assembling the outer ring to a housing of a device used, and the inner ring A step of preparing a pre-assembly comprising a rolling element and a cage, and a step of engaging a claw-shaped member of a hanger with a brim surface of the inner ring of the pre-assembly and lifting the pre-assembly by the hanger And the step of inserting the preliminary assembly separated from the hanger into an outer ring mounted on a housing. Assembly work is easy and can be done efficiently.

  The method for assembling the rolling bearing according to the present invention is particularly suitable as a method for assembling the rolling bearing for wind power generator.

  Even if it is a thin-walled carburized bearing ring that constitutes a large-sized rolling bearing used for a main shaft of a wind power generator, etc. by using the rolling bearing suspension of the present invention, it has a structure in which no screw hole is provided. There is no risk of problems such as cracking. Further, in terms of design, it is not necessary to secure a space for the screw hole, so that the degree of freedom in designing the bearing is improved, and as a result, the rated load of the bearing can be secured. In addition, additional processing such as through holes and screw holes is not required, and costs can be reduced.

  In the method of assembling the rolling bearing according to the present invention, the step of assembling the outer ring to the housing of the equipment to be used, the step of preparing a preliminary assembly comprising the inner ring, the rolling elements and the cage, and the small collar of the inner ring of the preliminary assembly Engaging a claw-shaped member of a lifting tool with a surface, lifting the preliminary assembly with the lifting tool, and inserting the preliminary assembly separated from the lifting tool into an outer ring mounted on a housing. Therefore, the assembling work is easy and can be performed efficiently.

  The method for assembling the rolling bearing according to the present invention is particularly effective as a method for assembling the rolling bearing for a wind power generator installed high on the ground.

It is a longitudinal cross-sectional view of the rolling bearing lifted with the lifting tool which concerns on this invention. It is a longitudinal section showing the whole hanging tool concerning a 1st embodiment of the present invention. It is an expansion longitudinal cross-sectional view of the principal part of the hanging tool of 1st Embodiment. It is a partial front view which shows the positional relationship of the nail | claw type | mold member of a hanger, a tapered roller, and the small collar surface of an inner ring | wheel. It is a longitudinal cross-sectional view which shows the intermediate | middle stage at the time of incorporating a rolling bearing in the housing of a use apparatus, and a rotating shaft based on the assembly method of the rolling bearing which concerns on this invention. It is a longitudinal cross-sectional view which shows the state which incorporated the rolling bearing in the housing and rotating shaft of a use apparatus based on the assembly method of the rolling bearing which concerns on this invention. It is an expanded longitudinal cross-sectional view of the principal part of the hanging tool of 2nd Embodiment. It is an expanded longitudinal cross-sectional view of the principal part of the hanging tool of 3rd Embodiment. It is an expansion longitudinal cross-sectional view of the principal part of the hanging tool of 4th Embodiment. It is the longitudinal cross-sectional view which showed the other example of the rolling bearing lifted with the lifting tool which concerns on this invention. It is a longitudinal cross-sectional view which shows the whole hanging tool which concerns on the 5th Embodiment of this invention.

  Hereinafter, an embodiment of the present invention will be described with reference to FIGS.

  1 to 6 show a first embodiment of the present invention. FIG. 1 shows a double-row tapered roller bearing as an example of a large-sized rolling bearing to be lifted by the lifting tool of the present invention. This double row tapered roller bearing 1 is used for a main shaft of a wind power generator, and has an outer diameter of about 700 to 800 mm and an inner diameter of about 500 to 600 mm. This double-row tapered roller bearing 1 is an outer ring separation type, an inner ring 2 having a double-row raceway surface 2a on the outer periphery, two outer rings 3 having a single-row raceway surface 3a on the inner periphery, and opposing raceway surfaces. A tapered roller 5 as a plurality of rolling elements disposed between 2 a and 3 a so as to be freely rollable in the circumferential direction, and a cage 6 for holding the tapered roller 5 are provided.

  The inner ring 2 is integrally formed, and the double-row raceway surfaces 2a formed on the outer periphery are each formed by a conical surface whose diameter is reduced from the axial center to both axial ends. A large brim surface 2b is formed at the axially central portion of the inner ring 2, and the large end surface 5a of the tapered roller 5 is guided by the large brim surface 2b. Small collar surfaces 2c are formed at both axial ends of the inner ring 2, and the small collar surfaces 2b of the tapered rollers 5 are guided by the small collar surfaces 2c. The tapered roller 5 is accommodated in the pocket 6 a of the cage 6. A spacer 7 is interposed between the two outer rings 3, and a through hole 7 a for replenishing grease as a lubricant is provided in the central portion in the axial direction of the spacer 7.

    2 to 4 show a hanging tool 10 according to the first embodiment of the present invention. FIG. 2 is a longitudinal sectional view showing the whole hanging tool, and FIG. 3 is an enlarged longitudinal sectional view of a main part of the hanging tool. FIG. 4 is a partial front view showing the positional relationship between the claw-shaped member of the hanger, the tapered roller, and the collar surface of the inner ring. As shown in FIG. 2, the hanger 10 includes a fixing member 11 formed in an annular shape and a claw-shaped member 12 fixed to the fixing member 11. A screw hole is provided on one surface (upper surface in FIG. 2) of the fixing member 11 in the axial direction, and a suspension ring 14 is screw-coupled to the suspension ring 14 at the tip of a rope indicated by a two-dot chain line. Hook a hook (not shown) and lift it upward. The lower surface in the axial direction of the fixing member 11 is in contact with the end surface of the inner ring 2. A claw-shaped member 12 is coupled and fixed to the outer peripheral portion of the fixing member 11 by a bolt 13. In the present embodiment, three claw-shaped members 12 and three suspension rings 14 are provided approximately equally in the circumferential direction of the fixing member 11. However, the number of the claw-shaped members 12 and the suspension rings 14 may be three or more, and the number is not limited. In addition, the circumferential arrangement is not necessarily arranged at equal intervals, and may be appropriately arranged while observing the balance of the lifting load.

The number of the claw-shaped members 12 arranged is determined from the strength relationship between the cross-sectional shape of the claw-shaped members 12 and the total weight lifted. As a result of various studies, it has been found that the design is made to satisfy the following relationship.
Total weight of lifting / (contact area between engagement surface of claw-shaped member and raceway ring × number of arrangement) <yield stress of claw-shaped member In the above relational expression, the unit is the total weight of lifting, the relationship between claw-shaped member The contact area between the mating surface and the raceway is mm ² , and the yield stress of the claw-shaped member is N / mm ² . By satisfying the above relationship, the required strength can be ensured and a reliable hanging tool can be realized.

  Before mounting the lifting tool 10, an assembly in which the tapered roller 5 and the cage 6 are incorporated in the inner ring 2 of the double row tapered roller bearing 1 is prepared. This assembly is referred to as a preliminary assembly 1 '. As shown in FIG. 3, in this state, the fixing member 11 of the hanger 10 is placed in contact with the end surface 2d of the inner ring 2 of the preliminary assembly 1 '. Thereby, the fixing member 11 of the hanger 10 can be positioned and the posture is stabilized. The claw-shaped member 12 is provided with a through-hole 12 a for a bolt 13, and the claw-shaped member 12 is fixed by tightening the bolt 13 into a screw hole 11 a provided in a horizontal direction from the outer peripheral surface of the fixing member 11. At the time of this clamping and fixing, the protrusion 12b formed at the tip of the claw-shaped member 12 comes into contact with the small brim surface 2c, which is a surface facing the axial direction of the inner ring 2, and reliably engages. In FIGS. 2 and 3, the height dimension of the small brim surface 2 c is slightly exaggerated from the actual dimension for easy understanding. The same applies to other embodiments.

  The fixing member 11 of the hanger 10 is manufactured from a steel material, but has a hardness of HRC32 or higher. It is not desirable to make the fixing member 11 thicker than necessary because it increases the steel material cost and the total lifting weight of the hanger 11. However, the weight of the large rolling bearing to be lifted is heavy, and a large load is applied to the portion where the claw-shaped member 12 and the suspension ring 13 are arranged in the circumferential direction of the fixed member 11. May occur. Therefore, it is desirable that the fixing member 11 has a hardness of HRC32 or higher. Thereby, the steel material cost of the hanger 11 and the increase in total lifting weight can be suppressed, and the lightweight hanger 10 is realizable.

  The claw-shaped member 12 of the lifting tool 10 is also made of steel, but at least the engaging surface 12c of the protrusion 12b formed at the tip of the claw-shaped member 12 may be made lower than the hardness of the inner ring 2 that is a raceway ring. desirable. If the hardness of the engaging surface 12c of the protrusion 12b is too high, the small collar surface 2c of the inner ring 2 may be damaged during mounting work or lifting. However, since the strength and durability of the engaging surface 12c of the protrusion 12b are required, it is desirable to set an appropriate hardness lower than the hardness of the inner ring 2 that is a race. When the hardness is set to about HRC45, the small collar surface 2c of the inner ring 2 is not damaged, and the strength and durability of the engaging surface 12c of the protrusion 12b can be secured, and the small claw-shaped member 12 can be secured. Therefore, in combination with the above-described specification of the fixing member 11 having the hardness HRC30 or more, the weight of the hanging tool 10 as a whole can be further reduced.

  FIG. 4 shows the positional relationship between the claw-shaped member 12 of the hanger 10, the tapered roller 5, and the small collar surface 2 c of the inner ring 2. The tapered rollers 5 are arranged on the raceway surface 2a of the inner ring 2 at equal intervals in the circumferential direction. The space formed between the adjacent tapered rollers 5 and the small brim surface 2c of the inner ring 2 and the inner diameter 6b of the cage 6 does not have a sufficient dimension as shown in FIG. In order to cope with this, the cross-sectional shape of the claw-shaped member 12 is formed in a substantially trapezoidal shape so as to ensure a cross-sectional area, and does not interfere with the small collar surface 2c of the inner ring 2, the tapered roller 5 and the inner diameter 6b of the cage 6. Consideration is taken. Thereby, the nail | claw type | mold member 12 can be inserted in an axial direction from the small collar surface 2c side of the inner ring | wheel 2, and a mounting operation becomes easy. The cross-sectional shape of the claw-shaped member 12 is not limited to a trapezoidal shape, but may be an arc shape. In short, while securing the cross-sectional area of the claw-shaped member 12, the small collar surface 2c of the inner ring 2, the tapered roller 5 and the cage 6 are used. Any shape that does not interfere with the inner diameter 6b of the substrate may be used.

  In FIG. 3, in the pre-assembly 1 ′ in which the tapered roller 5 and the cage 6 are incorporated in the inner ring 2, there is a gap between the pocket 6 a of the cage 6 and the tapered roller 5. 2 slightly away from the track surface 2a (not shown). However, since the large end surface 5a of the tapered roller 5 and the large collar surface 2b of the inner ring 2 and the small end surface 5b of the tapered roller 5 interfere with the small collar surface 2c of the inner ring 2, the preliminary assembly 1 'is not separated.

  In the present invention, attention has been paid to the fact that a significant advantage can be obtained by the combination of lifting using the state of the preliminary assembly 1 'and the method of assembling the rolling bearing described later. That is, in the mounting operation of the lifting tool 10 to the preliminary assembly 1 ′, the small brim surface 2 c of the inner ring 2 positioned at the upper end of the preliminary assembly 1 ′ is used as a surface with which the claw-shaped member 12 of the lifting tool 10 engages. Since it is used, it is sufficient to engage the claw-shaped member 12 of the hanger 10 from the upper end side of the preliminary assembly 1 ′, and the hanger can be easily attached and separated. Further, since the small brim surface 2c of the inner ring 2 is used in the inner ring 2 that is a race ring without additional processing such as a screw hole, the hanging tool 10 can be used without any problems such as cracking even if it is a carburized thin race ring. Can be installed. Furthermore, since the small collar surface 2b of the inner ring 2 can be tightened between the fixing member 11 of the lifting tool 10 and the protrusion 12c of the claw-shaped member 12, a stable lifting operation can be realized.

  Next, a method for assembling the rolling bearing according to the present invention will be described with reference to FIGS. FIG. 5 shows a stage in the middle of the assembly of the bearing, and FIG. 6 shows an assembled state. The spindle support device of a wind power generator is shown as a bearing use apparatus. As shown in FIG. 5, the main shaft 17 is disposed inside the housing 16 of the main shaft support device 15. A small-diameter inner peripheral surface 16a for mounting the seal device 18 and a large-diameter inner peripheral surface 16b for mounting a bearing are formed on the inner periphery of the housing 16. The main shaft 17 is formed with an outer peripheral surface 17a on which a bearing is mounted and a shaft end side outer peripheral surface 17b (left side in FIG. 5).

  As a procedure for assembling the bearing, as shown in FIG. 5, first, the sealing device 18 is inserted into the small-diameter inner peripheral surface 16a. Then, the outer ring 3 on one side of the double-row tapered roller bearing 1 is inserted into the large-diameter inner peripheral surface 16b and pushed in until it comes into contact with the shoulder portion 16c located on the back side of the large-diameter inner peripheral surface 16b. Next, the spacer 7 is inserted into the large-diameter inner peripheral surface 16b. The outer ring 3 and the spacer 7 on one side of the double-row tapered roller bearing 1 are similar to the above-described manner of the hanging tool according to the present invention on the end surface of the outer ring 3 and the end surface of the spacer 7 facing in the axial direction. Engage in the manner described above and lift in advance. At this time, the engagement state of the hanger may be either the inner diameter side or the outer diameter side of the outer ring 3 or the spacer 7.

  The preliminary assembly 1 ′ lifted by the lifting tool 10 is fitted to the outer peripheral surface 17 a of the main shaft 17 in the state shown in FIG. 5. Then, the bolt 13 of the claw member 12 of the hanger 10 is loosened to disengage the small brim surface 2c of the inner ring 2 and the protrusion 12b of the claw member 12, and the hanger 10 and the preliminary assembly 1 'are separated. To do. Thereafter, the preliminary assembly 1 ′ is pushed in until the small end surface 2 d of the inner ring 2 comes into contact with the shoulder portion 17 c of the main shaft 17 (see FIG. 6). In the above separation work of the hanger 10 and the preliminary assembly 1 ′, the claw-shaped member 12 of the hanger 10 is used for the small brim surface 2 c of the inner ring 2 positioned at the upper end (the outer end in the axial direction) of the preliminary assembly 1 ′. Is used for the engaging surface, the engagement of the claw-shaped member 12 of the lifting tool 10 can be released from the upper end side of the preliminary assembly 1 ', and the lifting work 10 and the preliminary assembly 1' can be easily separated. .

  Thereafter, as shown in FIG. 6, the remaining outer ring 3 is inserted into the large-diameter inner peripheral surface 16 b of the housing 16, and the raceway surface 3 a of the outer ring 3 is the rolling surface 5 c of the tapered roller 5 and the small end surface 3 b of the outer ring 3. Are pushed in until they come into contact with the end surface 7b of the spacer 7 respectively. Thereafter, the end surface 19 a of the fixing sleeve 19 is brought into contact with the small end surface 2 d of the inner ring 2 to position and fix the inner ring 2. On the other hand, on the outer ring 3 side, the cover member 20 is put on the housing 16 and is fastened and fixed by bolts 21. A sealing device 22 is attached to the lid member 20. Thereafter, grease, which is a lubricating oil, is enclosed, and the assembly work of the bearing is completed.

  In the method of assembling the rolling bearing described above, the step of assembling the outer ring 3 to the housing 16 of the equipment used, the step of preparing the pre-assembly 1 ′ incorporating the tapered roller 5 and the cage 6 in the inner ring 2, A step of lifting the preliminary assembly 1 ′ by engaging the claw-shaped member 12 of the lifting tool 10 with the small brim surface 2c of the inner ring 2 located at the upper end (the outer end in the axial direction) of the assembly 1 ′; Since the preliminary assembly 1 ′ separated from 10 is inserted into the outer ring 3 mounted on the housing 16, the assembling work is easy and efficient.

  FIG. 7 shows a hanger according to the second embodiment of the present invention. In this embodiment, only the inner ring of the preliminary assembly is shown, and the tapered rollers and the cage are omitted.

  The claw-shaped member 42 of this embodiment is different from the claw-shaped member 12 of the first embodiment in that a flange portion 42d extending inward in the radial direction is formed and an adjustment bolt 45 is provided. A screw hole 42e is formed in the flange portion 42d, and the adjustment bolt 45 is screwed into the screw hole 42e. As shown in FIG. 7, when an initial gap is generated when the engagement surface 42 c of the protrusion 42 b of the claw-shaped member 42 is brought into contact with the small collar surface 2 c of the inner ring 2 without tightening the bolt 43. In this, fine adjustment in the axial direction of the claw mold member 42 is performed by screwing the adjustment bolt 45, and then the claw mold member 42 can be fastened and fixed to the fixing member 41 with the bolt 43. As a result, the clearance between the engagement surface 42c of the claw-shaped member 42 and the small collar surface 2c of the inner ring 2 can be eliminated, and the engagement state can be optimized. Thereby, the lifting operation by the lifting tool 40 can be further stabilized. When the initial gap is small and can be lifted without problems, it can be omitted as in the case of other embodiments.

  FIG. 8 shows a hanger according to a third embodiment of the present invention. Also in this embodiment, only the inner ring of the preliminary assembly is shown, and the tapered rollers and the cage are omitted.

  The claw mold member 72 of this embodiment differs from the claw mold member 12 of the first embodiment in the shape of the engaging surface 72c of the protrusion 72b formed at the tip of the claw mold member 72. FIG. 8B shows the claw-shaped member 72 viewed from the outside of the fixing member 71 in the radial direction. This shape is the same as that of the claw-shaped member 12 of the first embodiment. On the other hand, FIG. 8C shows the claw-shaped member 72 viewed from the inside in the radial direction of the fixing member 71. The shape of the engaging surface 72c of the protrusion 72b is the same as that of the claw-shaped member 12 of the first embodiment. Different. The engagement surface 72c is formed at a middle height. In the middle and high shape, the central portion of the engaging surface 72c is convex by A so that the engaging surface 72c does not hit the small collar surface 2c of the inner ring 2. The dimension A can be appropriately set according to the size of the bearing to be lifted and the shape of the collar surface, but it is usually preferably about 0.5 to 1.0 mm. Although not shown, the engagement surface 72c may be formed in a middle-high shape in the radial direction of the claw-shaped member 12.

  FIG. 9 shows a hanger according to a fourth embodiment of the present invention. Also in this embodiment, only the inner ring of the preliminary assembly is shown, and the tapered rollers and the cage are omitted.

  The claw mold member 102 of this embodiment is different from the claw mold member 12 of the first embodiment in the shape of the through hole 102a of the bolt 103 and the claw mold member 102 for fixing the claw mold member 102 to the fixing member 101. The protrusion 102d provided at the upper end of the head is different. As shown in FIG. 9B, the through-hole 102a is formed in a long hole shape so that the position of the claw-shaped member 102 can be adjusted in the circumferential direction when the claw-shaped member 102 is fixed to the fixing member 101. With respect to the center of the nail mold member 102, only B can be adjusted in both the left and right directions (circumferential directions) in the figure. By adjusting the claw mold member 102 in the circumferential direction, the claw mold member 102 can be inserted so as not to interfere between the tapered rollers 5 when the claw mold member 102 is engaged with the small collar surface 2c of the inner ring 2 (see FIG. 4). ). The reason is that the position between the tapered rollers 5 and the position of the claw-shaped member 102 may be shifted depending on the number of the tapered rollers 5 to be arranged, the odd number or the even number, and the circumferential direction of the claw-shaped member 102 is adjusted. Thereby, the position between the tapered rollers 5 and the position of the claw-shaped member 102 can be matched. When the dimension B is shifted to 5 mm or more, in order to ensure the rigidity of the claw-shaped member 102, a protrusion 102d is provided at the upper end of the claw-shaped member 102 so as to have an L-shaped cross section. This also makes it possible to deal with moments around the bolt 103.

  FIG. 10 shows a double-row self-aligning roller bearing 111 as another example of a large-sized rolling bearing which is an object to be lifted by the lifting tool of the present invention. This self-aligning roller bearing 111 is also used for a main shaft of a wind power generator, and has an outer diameter of about 700 to 800 mm and an inner diameter of about 500 to 600 mm. In this self-aligning roller bearing 111, an inner ring 112 and an outer ring 113 are both integrated, an inner ring 112 having a double row raceway surface 112a on the outer periphery, and an outer ring 113 having a double row raceway surface 113a on the inner periphery, A spherical roller 115 serving as a plurality of rolling elements disposed between the facing raceway surfaces 112a and 113a so as to freely roll in the circumferential direction, and a cage 116 that holds the spherical roller 115 are provided.

  In the self-aligning roller bearing 111, the double-row raceway surface 113a of the outer ring 113 with which the rolling surface 115c of the spherical roller 115 abuts is formed in a continuous spherical shape. The double-row raceway surfaces 112a of the inner ring 112 with which the rolling surface 115a of the spherical roller 115 abuts are reduced in diameter from the central portion in the axial direction toward both end portions in the axial direction, and the generatrix shape of the rolling surface 115c of the spherical roller 115 is obtained. Is formed in a circular arc shape along. A large brim surface 112b is formed in the axial center of the inner ring 112, and the large end surface 115a of the spherical roller 115 is guided by the large brim surface 112b. Small flange surfaces 112c are formed at both axial ends of the inner ring 112, and the small end surfaces 115b of the spherical rollers 115 are guided by the small flange surfaces 112c. The spherical roller 115 is accommodated in the pocket 116 a of the cage 116.

  In the double row spherical roller bearing 111, the inner ring 112 and the outer ring 113 are both integrated. The assembly of the bearing alone is performed as follows. That is, a preliminary assembly 111 ′ in which a retainer 116 and a spherical roller 115 are incorporated in the inner ring 112 is prepared, and the axis of the preliminary assembly 111 ′ is arranged at right angles to the axis of the outer ring 113, and the spherical rollers opposed in the diametrical direction. It is inserted from the opening at the end of the raceway surface 113a of the outer ring 113 at a position of the minimum circumscribed distance between 115. Thereafter, the preliminary assembly 111 ′ is rotated and assembled in the outer ring 113 until the axes of the inner ring 112 and the outer ring 113 are positioned. In the double-row self-aligning roller bearing 111, although not shown in the drawings, it is similarly lifted by the lifting devices 10, 40, 70, 100 of the above-described embodiments using the small collar surface 112c of the inner ring 112. Can do.

  In the hanging tool of each of the embodiments described above, the case has been described in which the outer ring is previously incorporated in the housing of the device used and the preliminary assembly including the inner ring, the roller, and the cage is lifted by the lifting tool. 5 shows a fifth embodiment of a lifting tool for lifting after assembling a bearing.

  As shown in FIG. 11, the double row tapered roller bearing 1 including the inner ring 2, the outer ring 3, the tapered roller 5, and the cage 6 has already been assembled. The hanger 130 includes a fixing member 131 and a claw-shaped member 132. The fixing member 131 is formed in a sleeve shape, and the claw-shaped member 132 is fixed to the lower portion by a bolt 133. At the upper end of the fixing member 131, a flange-like protruding portion 131a is provided and a suspension ring 134 is attached.

  In a state where the claw-shaped member 132 is not attached to the fixing member 131, the lifting tool 130 is lowered in the axial direction and fitted from above the double-row tapered roller bearing 1 in a state where the fixing member 131 is assembled. With the flange-shaped protrusion 131 a of the fixing member 131 in contact with the end surface of the upper outer ring 3, the claw-shaped member 132 is attached to the fixing member 131, and the protrusion 132 b of the claw-shaped member 132 is attached to the end surface of the lower outer ring 3. The bolt 133 is tightened and fixed in a state where the two are in contact with each other. Thereafter, a hook (not shown) provided at the tip of the rope indicated by a two-dot chain line is hung on the suspension ring 134 and lifted upward.

  In the first to fourth embodiments described above, the case of the preliminary assembly 1 ′ that targets the inner ring 2 having the double-row raceway surface 2 a on the outer periphery as the object to be lifted by the lifting tool has been described. In the case of two inner rings having a single-row raceway surface, a pre-assembly is obtained by incorporating a single-row tapered roller and a cage into one inner ring. Even in the case of a single row tapered roller bearing, a pre-assembly is obtained by incorporating a single row tapered roller and a cage into one inner ring.

  Furthermore, the object to be lifted by the lifting tool according to the present invention is not limited to the preliminary assembly as described above, but can be applied to a single component such as an inner ring or an outer ring, or a bearing assembly. In addition, when the hook member of the lifting device is engaged with the inner ring, the outer ring, or the axially facing surface of the bearing assembly, either the outer diameter side or the inner diameter side in the radial direction is selected depending on the state of the engaging portion. These may be selected as appropriate. The target bearing to be lifted by the lifting tool according to the present invention can be applied not only to a wind power generator but also to a large-sized rolling bearing used for a tunnel excavator or a construction machine.

1. Double row tapered roller bearing 1 'Preliminary assembly 2, 112 Inner ring 2a, 112a Raceway surface 2b, 112b Large brim surface 2c, 112c Small brim surface 2d Small end surface 3, 113 Outer ring 3a, 113a Raceway surface 5 Tapered roller 5a, 115a Large end surface 5b, 115b Small end surface 5c, 115c Rolling surface 6, 116 Cage 6a, 116a Pocket 6b Inner diameter 7 Spacer 7a Through hole 10, 40, 70, 100, 130 Suspension tool 11, 41, 71, 101, 131 Fixing member 11a Screw holes 12, 42, 72, 102, 132 Claw-shaped members 12a, 102a Through holes 12b, 42b, 72b, 132b Protruding portions 12c, 42c Engaging surfaces 13, 43, 103, 133 Bolts 14, 134 Hanging Wheel 15 Main shaft support device 16 Housing 16a Small diameter inner peripheral surface 16b Large diameter inner peripheral surface 16c Shoulder portion 17 Main shaft 17a Outer peripheral surface 7b shaft end side outer peripheral surface 17c shoulder 18 the sealing device 19 for fixing the sleeve 19a end face 20 lid member 21 bolt 22 sealing device 102d protrusions 111 double row self-aligning roller bearings 131a protruding portions A, B Dimensions

Claims (17)

An inner ring having a raceway surface on the outer periphery, an outer ring having a raceway surface on the inner periphery, a plurality of rolling elements arranged in a circumferential direction between the raceway surface of the inner ring and the raceway surface of the outer ring, and the inner ring and the outer ring A lifting device for lifting a rolling bearing having a cage and a cage that accommodates the rolling element as a component,
The lifting tool includes a fixing member to which a suspension ring can be attached and a claw-type member fixed to the fixing member. The claw-type member is engaged with an axially directed surface of a component of the rolling bearing. A suspension for rolling bearings characterized by being made to cause.   The object to be lifted by engaging the claw-shaped member is a preliminary assembly including an inner ring, a rolling element and a cage of the rolling bearing, or an inner ring or an outer ring before assembly. Rolling bearing hanger.   The said rolling bearing is a double row tapered roller bearing, The lifting tool for rolling bearings of Claim 1 or Claim 2 characterized by the above-mentioned.   The said rolling bearing is a double row automatic roller bearing, The suspension for rolling bearings of Claim 1 or Claim 2 characterized by the above-mentioned.   The said rolling bearing is a bearing for wind power generators, The lifting tool for rolling bearings of any one of Claims 1-4 characterized by the above-mentioned.   The rolling bearing suspension device according to any one of claims 1 to 5, wherein the fixing member is formed in an annular shape and abuts against an end surface of the inner ring.   The rolling bearing suspension according to claim 6, wherein the fixing member has a hardness of HRC32 or higher.   The rolling bearing suspension device according to any one of claims 1 to 7, wherein the claw-shaped member is engaged with a small collar surface of an inner ring.   9. The hoist for a rolling bearing according to claim 1, wherein the claw-shaped member has a shape that does not interfere with the cage and the roller, and can be inserted from the end face side of the inner ring. .   The rolling bearing suspension device according to any one of claims 1 to 9, wherein the engaging surface of the claw-shaped member has a middle-high shape.   The rolling bearing suspension device according to any one of claims 1 to 10, wherein the hardness of at least the engaging surface of the claw-shaped member is lower than the hardness of the raceway ring.   The rolling bearing suspension device according to any one of claims 1 to 11, wherein three or more claw-shaped members are arranged on a circumference of the fixed member. The rolling bearing suspension device according to claim 12, wherein the number of the claw-shaped members arranged satisfies the following relationship.
Total weight of lifting / (contact area between the engaging surface of the claw-shaped member and the bearing ring × number of arrangement) <yield stress of the claw-shaped member   The claw-shaped member is fastened and fixed to the fixing member with a bolt, and the fixing member is provided with a screw hole, and the claw member is provided with an oval through hole that can be adjusted in the circumferential direction of the fixing member. The rolling bearing suspension device according to any one of claims 1 to 13, wherein the suspension device is a rolling bearing suspension device.   The length adjustable in the circumferential direction is set to 5 mm or more on both sides with respect to the center of the claw-shaped member, and a protrusion is provided on the claw-shaped member to be engaged with a fixing member. The suspension for rolling bearings according to any one of claims 1 to 14. An inner ring having a raceway surface on the outer periphery, an outer ring having a raceway surface on the inner periphery, a plurality of rolling elements arranged in a circumferential direction between the raceway surface of the inner ring and the raceway surface of the outer ring, and the inner ring and the outer ring An assembly method of a rolling bearing provided with a cage for accommodating the rolling elements,
A step of assembling the outer ring to the housing of the device used; a step of forming an assembly comprising the inner ring, a rolling element and a cage; and engaging a claw-shaped member of a lifting tool with a small brim surface of the inner ring of the assembly; A method of assembling a rolling bearing, comprising: a step of lifting the assembly to the vicinity of the housing by the suspension; and a step of inserting the assembly separated from the suspension into an outer ring attached to the housing.   The method of assembling a rolling bearing according to claim 16, wherein the device used is a wind power generator.

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