JP5350185B2 - Roller bearing assembly method and apparatus - Google Patents

Description

  The present invention relates to a method for assembling a roller bearing and an apparatus used for the method, and more specifically, when a predetermined number of rollers are assembled on a raceway surface of an inner ring (inner ring or outer ring), the raceway is directed toward the last roller. The wheel is moved in the radial direction.

  Patent Document 1 discloses a roller bearing in which a roller is press-fitted from the inside toward a raceway surface of an outer ring. In this type of roller bearing, the rollers are arranged on the raceway surface of the inner ring or the outer ring by press-fitting the roller in the radial direction of the bearing between the cage pocket and the adjacent separator. Usually, in this type of bearing, when a roller is press-fitted between a pocket or a separator of a cage, an inner ring subassembly or an outer ring subassembly is fixed, and the roller is pushed in for press-fitting. Referring to FIG. 3, the outer ring subassembly composed of the outer ring 1 and the cage 5 is arranged on the surface plate 6 in a state where it is laid down. The outer ring 1 is a double collar type having collars 3 on both sides of the raceway surface 2. The surface plate 6 has a circular table surface 6a, and a groove 6b that is one step lower is formed on the outer periphery thereof. A receiving member 7 is fixed to the outside of the groove 6b. The receiving member 7 may be a pair of members arranged to face each other in the diametrical direction, or may be an annular member arranged concentrically outside the outer ring 1. A predetermined number of rollers 4 are placed on the table surface 6a and moved to the raceway surface 2 of the outer ring 1 by the pressing head 8, as shown on the left side of the center line in FIG. In the case of a bearing with a cage, the rollers 4 are pressed into the pockets of the cage 5 by pushing the rollers 4 in the radial direction toward the raceway surface 2. In the case of a full-roller bearing or a bearing with a separator, the last roller 4 is pressed into the raceway surface 2 in the radial direction. On the right side of the center line in FIG. 3, the roller 4 is shown in a fixed position in the raceway groove.

JP 2007-162918 A

However, in the above conventional assembly method, it is necessary to displace the roller 4, so that the behavior of the roller 4 becomes unstable during the press-fitting process, and in particular, in the case of an elongated roller, the roller may fall.
Therefore, an object of the present invention is to stabilize the behavior of the rollers in the process of assembling the roller bearings by arranging the rollers on the raceway surface of the raceway.

  The present invention solves the problem by fixing the rollers and displacing the raceway in the radial direction toward the fixed rollers. That is, the roller bearing assembling method according to the present invention removes only one roller when the roller bearing is assembled by arranging a predetermined number of rollers on the raceway surface of the bearing ring arranged on the surface plate. After the rollers are arranged on the raceway so as to form a series of roller rows, the one roller is fixed on a surface plate, and the race is displaced in the radial direction toward the fixed roller, The one roller is pushed between rollers positioned at an end of the roller row. By adopting such a configuration, it is not necessary to displace the roller, so that the behavior of the roller does not become unstable, and there is no possibility that the elongated roller will fall down.

A roller bearing assembling apparatus according to the present invention is an apparatus for carrying out the invention of the above-described method, and includes a surface plate, a cradle for a roller detachable from the surface plate, and a pressing force for displacing the raceway in a radial direction. A bearing surface that supports the end surface of the bearing surface that supports the rolling surface of the roller, and the height of the seat surface from the surface plate is the collar width of the bearing ring. It is characterized by being equivalent to.
Here, the side surface of the raceway surface (inner ring or outer ring) may be scratched due to sliding with the surface plate. However, when the bearing is used, the side surface does not become a slip surface. The effect on bearing performance is very small. Furthermore, it is not necessary to provide a groove (6b in FIG. 3) for mounting the inner ring subassembly and the outer ring subassembly on the surface plate, and the assembling apparatus can be simplified.

  When the roller is placed on the cradle, the end face of the roller is seated on the seat surface of the cradle, and the support surface of the cradle supports the rolling surface of the roller. By setting the seat surface of the cradle to a downward slope toward the cradle receiving surface, the rollers can be prevented from falling.

  The cradle has a cylindrical shape with the outer peripheral surface partially removed, so that when the raceway is displaced in the radial direction, the cradle is less likely to interfere with the cage and separator, and the cradle is made of a prism. Compared to the above, it is possible to easily form the recess for the cradle provided on the surface plate.

  When the cradle is cylindrical, it is desirable to provide a key groove on the outer peripheral surface to prevent rotation. In this case, a key is interposed between the surface plate and the cradle.

  The spacing member may be detachable from the receiving surface of the cradle. Since this spacing member is interposed between the bearing surface and the rolling surface, the same cradle can be used for bearings having different roller diameters. In other words, when assembling a bearing with a large roller diameter, remove the spacing member, and when assembling a bearing with a small roller diameter, install the spacing member with a specified thickness, and incorporate the roller without changing the cradle. Can do.

  A recess for fitting the cradle may be formed on the surface plate, a tap hole penetrating the bottom surface of the recess may be provided, and the cradle may be supported by a tip of a bolt that has passed through the tap hole. By adopting such a configuration, the height of the cradle can be adjusted by rotating the bolt. Therefore, it is possible to use the same cradle for bearings having different inner ring or outer ring brim widths. it can.

  In order to guide the outer ring in the pressing direction by the pressing mechanism, a guide mechanism in contact with the outer peripheral surface of the outer ring may be provided. For example, the guide mechanism has a pair of guide plates, each guide plate has a long hole extending in a direction perpendicular to the pressing direction, and a bolt is inserted into the long hole so as to be detachably fixed to the surface plate. Can be. Since the distance between the guide plates can be changed, it is possible to cope with bearings having different outer ring outer diameters.

  According to this invention, since the behavior of the roller is stabilized when the raceway is radially displaced toward the roller and the roller is press-fitted, a highly versatile assembly method and assembly apparatus that can be press-fitted even with an elongated roller. Can be provided.

It is sectional drawing of the assembly apparatus of the roller bearing which shows embodiment of this invention. FIG. 2 is a perspective view of the apparatus of FIG. It is sectional drawing which shows the prior art.

Embodiments of the present invention will be described below with reference to the drawings.
As shown in FIG. 1 and FIG. 2, a case where the present invention is applied to the assembly of a cylindrical roller bearing 10 having a flange portion 16 at both ends of the outer ring 12 will be described as an example. In this cylindrical roller bearing 10, rollers 20 and separators 26 are alternately arranged on the raceway surface 14 of the outer ring 12, and the separators 26 positioned on both sides of the roller 20 to be assembled last are rolled on the rollers 20 that have already been arranged. The roller 20 is incorporated into the inner periphery of the outer ring 12 while sliding the separators 26 located on both sides by pressing the outer ring 12 toward the roller 20 to be assembled last while being along the moving surface 22. be able to. Although the inner ring is not shown, depending on the bearing type, it is inserted inside the roller 20 or the outer peripheral surface of the shaft is directly used as the inner ring raceway surface.

  Here, FIG. 1 is a sectional view of the assembling apparatus, and FIG. 2 is a perspective view of the assembling apparatus. As shown in the drawing, the assembling apparatus includes a surface plate 30, a roller cradle 40, a pressing mechanism 50, and a guide mechanism 54.

  The surface plate 30 has a recess 32, and the cradle 40 is detachably attached to the recess 32. Here, the example which accommodated the column-shaped receiving stand 40 in the cylindrical recessed part 32 is illustrated. A key groove 36 is formed in the peripheral wall of the recess 32. A tap hole 34 a penetrating the surface plate 30 is formed at the bottom of the recess 32. A height adjustment bolt 38 is attached to the tap hole 34 a, and the tip surface of the height adjustment bolt 38 forms the bottom surface of the recess 32.

  The cradle 40 is formed with a receiving surface 42 and a seating surface 44 by notching a part of the outer peripheral surface. When the roller 20 is placed on the cradle 40, the receiving surface 42 supports the rolling surface 22 of the roller 20, and the seating surface 44 supports the end surface 24 of the roller 20. The seating surface 44 can be inclined downward toward the receiving surface 42 so that the roller 20 is stabilized. Further, the height of the seating surface 44 from the surface plate 30 is equal to the width of the flange portion 16 of the outer ring 12 so as not to interfere with the flange portion 16 when the roller 20 is press-fitted toward the raceway surface 14 of the outer ring 12. Is preferable. Although not shown, a resin spacing member may be detachably attached to the receiving surface 42 of the cradle 40, for example, by screws. The spacing member may have a concave shape that receives the rolling surface 22 of the roller 20 so that the roller 20 can be stably supported. A key groove 46 extending in the axial direction is formed on the outer peripheral surface of the cradle 40 opposite to the receiving surface 42. By engaging the key 48 across the key groove 36 of the recess 32 of the surface plate 30 and the key groove 46 of the cradle 40, the cradle 40 is prevented from rotating.

  The pressing mechanism 50 has a pressing head 52 that can move in parallel with the surface of the surface plate 30. When the pressing head 52 is driven, the outer peripheral surface 18 of the outer ring 12 is received by the cradle 40 as shown by the white arrow in FIG. Press toward. A hydraulic cylinder is used as a drive mechanism for moving the pressing head 52 (not shown). The hydraulic cylinder has a cylinder cylinder that is open on the side facing the pressing head 52, a piston that is oil-tightly fitted in the cylinder cylinder, one end face coupled to the piston, and the other end face to the pressing head 52. A pressing rod that is abutted against. An oil supply port is provided at the base end of the cylinder tube so that pressure oil can be fed into the cylinder tube freely. That is, when the pressure oil is fed into the cylinder cylinder through the oil supply port, the pressing rod can press the pressing head 52 and thereby press the race. The pressing head 52 and the pressing rod can be formed integrally.

  The guide mechanism 54 plays a role of guiding the outer ring 12 in parallel with the moving direction of the pressing head 52 when the pressing head 52 presses the outer ring 12. Here, the guide mechanism 54 includes a pair of guide plates 56. The pair of guide plates 56 are detachably fixed to the surface plate 30 so that the distance between them can be changed. Each guide plate 56 has a long hole 58, and the surface plate 30 is provided with a number of tap holes 34b. Then, the guide plate 56 is fixed by screwing and fastening the fixing bolt 60 inserted into the long hole 58 into the tap hole 34b. Since the elongated hole 58 extends in a direction perpendicular to the moving direction of the outer ring 12 by the pressing head 52, the distance between the pair of guide plates 56 can be finely adjusted by simply loosening the bolt 60.

  An outline of a method for assembling a roller bearing using the above-described assembling apparatus will be described as follows with reference to FIGS. When assembling the roller bearing 10 by arranging a predetermined number of rollers 20 on the raceway surface 14 of the raceway ring 12 placed on the surface plate 30, only one roller 20 is removed and the remaining rollers 20 are a series of. After being arranged on the raceway surface 14 so as to form a roller train, the one roller 20 is fixed on the surface plate 30, and the race 12 is displaced in the radial direction toward the fixed roller 20, The one roller 20 is pushed between the rollers 20 located at the end of the roller row.

  In the embodiment shown in FIGS. 1 and 2, the extended portions 28 having surfaces facing the end surfaces 24 of the rollers 20 are provided at both axial ends of the separator 26. In this case, since the extended portion 28 is caught on the end surface 24 of the roller 20, the separators 26 on both sides are not displaced in the axial direction when the last roller 20 is press-fitted toward the raceway surface 14 of the outer ring 12. Workability is significantly improved. This action of preventing the separator 26 from shifting in the axial direction lasts not only during the assembly process, but also after assembly and during bearing operation.

DESCRIPTION OF SYMBOLS 10 Cylindrical roller bearing 12 Outer ring 14 Raceway surface 16 Collar 18 Outer peripheral surface 20 Roller 22 Rolling surface 24 End surface 26 Separator 28 Expansion part 30 Surface plate 32 Recessed part 34a Tap hole (for height adjustment bolt)
34b Tap hole (for fixing the guide plate)
36 Key Groove 38 Height Adjustment Bolt 40 Receiving Base 42 Receiving Surface 44 Seating Surface 46 Key Groove 48 Key 50 Pressing Mechanism 52 Pressing Head 54 Guide Mechanism 56 Guide Plate 58 Slotted Hole 60 Fixing Bolt

Claims (9)

  When assembling a roller bearing by arranging a predetermined number of rollers on the raceway of the race ring placed on a surface plate, remove only one roller and make the remaining rollers form a series of roller trains. After the arrangement on the surface, the one roller is fixed on the surface plate, and the race is displaced in the radial direction toward the fixed roller, so that the rollers located at the end of the roller row are positioned between the rollers. A method for assembling a roller bearing, wherein the one roller is pushed.   An apparatus for carrying out the invention of claim 1, comprising: a surface plate; a cradle for a roller detachable from the surface plate; and a pressing mechanism for displacing the raceway in a radial direction. A bearing surface that supports the end surface of the bearing surface that supports the rolling surface of the roller, and the height of the seat surface from the surface plate is equal to the collar width of the raceway ring. Roller bearing assembly equipment.   The assembly apparatus according to claim 2, wherein the seating surface is inclined downward toward the receiving surface.   4. The assembling apparatus according to claim 2, wherein the cradle has a cylindrical shape with a part of the outer peripheral surface cut away.   The assembly apparatus according to claim 4, wherein a keyway is provided on an outer peripheral surface of the cradle.   6. The assembling apparatus according to claim 2, wherein an interval body is detachable from the receiving surface of the cradle.   A recess for fitting the cradle is formed in the surface plate, a tap hole penetrating the bottom surface of the recess is provided, and the cradle is supported by a tip of a bolt passed through the tap hole. 7. The assembling apparatus according to any one of 6 above.   The assembly device according to any one of claims 2 to 7, further comprising a guide mechanism that contacts the outer peripheral surface of the outer ring and guides the outer ring in a pressing direction by the pressing mechanism.   The guide mechanism has a pair of guide plates, each guide plate has a long hole extending in a direction perpendicular to the pressing direction, and a bolt is inserted into the long hole so as to be detachably fixed to the surface plate. Item 9. The assembly apparatus according to Item 8.

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