JP2015227669A - Insertion/removal jig of cylindrical roller bearing, disassembly method, and assembly method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an insertion/removal jig which enables a holder with rollers to be easily inserted or removed even in a large and heavy cylindrical roller bearing, to provide a disassembly method and an assembly method.SOLUTION: An insertion/removal jig 100 of a cylindrical roller bearing includes: a pedestal 110 on which a cylindrical roller bearing 200 is installed in a posture such that an axis of the cylindrical roller bearing 200 is arranged in a substantially horizontal direction; an insertion plate 130 which is formed by a thin plate having a partly cylindrical shape and inserted into a space between cylindrical rollers 206 of the cylindrical roller bearing 200 and an outer ring 202; and a rotary mechanism which rotates the insertion plate 130 around the axis of the cylindrical roller bearing 200.

Description

  The present invention relates to an insertion / extraction jig, a disassembling method, and an assembling method for inserting / extracting a cage with a roller of a cylindrical roller bearing.

  In the cylindrical roller bearing, a cage for holding a plurality of cylindrical rollers and maintaining the posture and interval of the cylindrical rollers is used. This type of roller bearing maintains stable rotation of the cylindrical roller and is easy to assemble, and it is also easy to disassemble the bearing during maintenance and inspection. It has been used since ancient times.

  For example, in Patent Document 1, a plurality of pockets are provided in a cage, and a rolling element (cylindrical roller) is held in each pocket so that the rolling element can roll and move in the radial direction of the cage. A rolling bearing is described. In the cage described in Patent Document 1, the radial positions for holding the rolling elements are different between the adjacent first pocket and second pocket. Thereby, when pushing a rolling element into a holder | retainer, the control piece for preventing dropping of a rolling element is not pressed by the rolling element accommodated in the adjacent pocket in the reverse direction. Therefore, it is described that the rolling element can be pushed in by elastically deforming the restraining piece with a relatively light force, and the contact pressure between the restraining piece and the rolling element is reduced, and the surface of the rolling element is hardly damaged.

Japanese Patent No. 3261813

  The outer ring of the cylindrical roller bearing may be provided with a flange (flange) that restricts the axial movement of the cylindrical roller. Moreover, the labyrinth seal which suppresses a cylindrical roller may be attached to the opening end of an outer ring | wheel. When disassembling / assembling a cylindrical roller bearing using such an outer ring, it is necessary to insert / extract the roller-attached cage with respect to the outer ring while the cylindrical roller is brought inward in the radial direction of the cage. In particular, when disassembling, it is difficult to bring all the cylindrical rollers to the inside in the flanged cage inside the outer ring. Conventionally, there is no established disassembly method, and a cylinder can be obtained by inserting a spatula between the outer ring and the cage to bring the cylindrical roller inward, or by laying the bearing (with the axial direction up and down). The rollers are moving inward.

  However, when a spatula is inserted between the outer ring and the cage, since these gaps are small, careful work is required and work efficiency is poor. Further, when the bearing is swung around to bring the cylindrical roller inward, a small light bearing is easy, but a large heavy bearing is difficult to work.

  Accordingly, an object of the present invention is to provide an insertion / extraction jig, a disassembling method, and an assembling method capable of easily inserting / extracting a cage with a roller even for a large and heavy cylindrical roller bearing.

  In order to solve the above-described problems, a typical configuration of the present invention is a cylindrical roller bearing insertion / extraction jig, a base for installing the cylindrical roller bearing in a posture in which the axis thereof is substantially horizontal, and a partial cylindrical shape It is characterized by having an insertion plate made of a thin plate and inserted between the cylindrical roller and the outer ring of the cylindrical roller bearing, and a rotation mechanism for rotating the insertion plate around the axis of the cylindrical roller bearing.

  The cylindrical roller bearing targeted by the insertion / extraction jig according to the present invention includes an inner ring having a raceway on the outer peripheral surface, an outer ring having a raceway on the inner peripheral surface, and a plurality of rolls interposed between the raceways. A cylindrical roller and a cage that holds each cylindrical roller in a circumferentially spaced manner so as to be able to roll freely. The cage holds one cylindrical roller in each of a plurality of pockets that are open on both sides in the radial direction. In addition, the cylindrical roller is movable in the radial direction within the pocket.

  According to the above configuration, the upper cylindrical roller of the cage with rollers moves downward by its own weight, and a gap is formed between the outer ring and the cage. Therefore, the insertion plate can be inserted between the upper cylindrical roller and the outer ring without damaging the cylindrical roller. By rotating the insertion plate and the cylindrical roller bearing, the cage with rollers can be placed on the insertion plate, and the cage with rollers can be easily extracted from the outer ring. Also, when assembling the cylindrical roller bearing, if the cage with rollers is placed on the insertion plate, all the cylindrical rollers are moved inward in the radial direction, so that they can be easily inserted into the outer ring.

  Moreover, it is preferable to have the inclination of the shape which notched the corner of the partial cylindrical shape in both ends of the front-end | tip of an insertion board.

  Thereby, even if the obliquely upper cylindrical roller is not moved inward in the radial direction, it can be moved inward by the inclination, so that the insertion plate can be smoothly inserted.

  Another representative configuration of the present invention is a method for disassembling a cylindrical roller bearing, wherein the cylindrical roller bearing has a posture in which the axis thereof is substantially horizontal, and a cage with a plurality of cylindrical rollers assembled to the cage. With the upper cylindrical roller dropped downward, insert an insertion plate made of a partially cylindrical thin plate between the upper cylindrical roller and the outer ring, and the insertion plate and the cylindrical roller bearing. The insertion plate is extracted from the outer ring in a state in which the roller-attached cage is placed on the insertion plate.

  According to the above configuration, the cylindrical roller on the upper side of the cage with rollers moves downward by its own weight, and a gap is also formed between the outer ring and the cage, so that the insertion plate can be easily inserted between the cylindrical roller and the outer ring. can do. Then, by rotating the insertion plate and the cylindrical roller bearing until the insertion plate is on the lower side, the cylindrical roller on the upper side of the cage with rollers also falls, so that all the cylindrical rollers are moved radially inward. be able to. In this way, the roller cage can be scooped up by the insertion plate. By removing the insertion plate from the outer ring in this state, the cage with rollers can be easily extracted from the outer ring.

  Another exemplary configuration of the present invention is a method of assembling a cylindrical roller bearing, wherein a cage with rollers in which a plurality of cylindrical rollers are assembled to a cage is placed on an insertion plate made of a partially cylindrical thin plate, With the outer ring of the cylindrical roller bearing and the cage with rollers positioned so that its axis is substantially horizontal, the cage with rollers on the insertion plate is inserted into the outer ring, and the insertion plate and cylindrical roller bearing are placed on the upper side. It rotates until it becomes, The retainer with a roller is left in an outer ring | wheel, It is characterized by extracting an insertion plate from an outer ring | wheel.

  According to the above configuration, when the cage with rollers is placed on the insertion plate, the upper cylindrical roller moves radially inward by its own weight, and the lower cylindrical roller is pushed by the insertion plate and moves radially inward. . Therefore, since all the cylindrical rollers are moved radially inward, the cage with rollers can be easily inserted into the outer ring. The assembly can be easily performed by rotating the insertion plate and dropping the roller cage into the outer ring.

  According to the insertion / extraction jig, disassembly method, and assembly method for the cylindrical roller bearing according to the present invention, it is possible to easily insert / extract the cage with rollers even for a large and heavy cylindrical roller bearing.

It is a perspective view which shows the whole structure of the insertion / extraction jig | tool of a cylindrical roller bearing. It is a disassembled perspective view of an insertion / extraction jig | tool. It is a fragmentary sectional exploded view explaining the schematic structure of a cylindrical roller bearing. It is a figure explaining the decomposition | disassembly method of a cylindrical roller bearing. It is a figure explaining the decomposition | disassembly method of a cylindrical roller bearing. It is a figure explaining the decomposition | disassembly method of a cylindrical roller bearing.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The dimensions, materials, and other specific numerical values shown in the embodiments are merely examples for facilitating understanding of the invention, and do not limit the present invention unless otherwise specified. In the present specification and drawings, elements having substantially the same functions and configurations are denoted by the same reference numerals, and redundant description is omitted, and elements not directly related to the present invention are illustrated or described. Is omitted.

  FIG. 1 is a perspective view showing the overall configuration of an insertion / extraction jig 100 for a cylindrical roller bearing, and FIG. 2 is an exploded perspective view of the insertion / extraction jig 100.

  As shown in FIGS. 1A and 2, the insertion / extraction jig 100 according to the present embodiment includes a pedestal 110, a reversing shaft 120, and an insertion plate 130, when roughly classified.

  The pedestal 110 has a housing 114 standing on a base 112 serving as a bottom plate. The housing 114 is provided with a rotation hole 114a for fitting the reversing shaft 120 rotatably. Two rollers 116 are disposed on the front side of the housing 114 along the upper surface of the base 112. The roller 116 is provided to place a cylindrical roller bearing 200 (see FIG. 3) described later. On the roller 116, an operation of rotating the cylindrical roller bearing 200 and an operation of sliding the cylindrical roller bearing 200 in the axial direction of the roller 116 (direction to come in contact with and away from the insertion plate 130) are performed.

  As shown in FIG. 2, the reversing shaft 120 is configured to rotate the sleeve 122 that is rotatably fitted in the rotation hole 114 a of the housing 114, the flange 124 provided at the rear end of the sleeve 122, and the reversing shaft 120. It consists of a handle 126. The outer diameter of the flange 124 is formed larger than the inner diameter of the rotation hole 114 a, and the reversing shaft 120 does not drop out to the front side of the housing 114. Further, a holding lid 118 disposed on the rear side of the flange 124 is fastened and fixed to the housing 114, and the reversing shaft 120 does not drop off on the rear side of the housing.

  A notch 114b is provided on the rear side of the housing 114. When the reversing shaft 120 and the holding lid 118 are attached to the housing 114, the handle 126 is movable in the notch 114b. The notch 114b is notched 180 ° with respect to the center of the rotation hole 114a. Accordingly, as shown in FIGS. 1A and 1B, the handle 126 can be rotated 180 °, and the reversing shaft 120 is rotated 180 ° accordingly. That is, the housings 114 and 120 constitute a rotation mechanism that rotates the insertion plate 130 about the axis of the cylindrical roller bearing 200 with respect to the pedestal 110.

  An insertion plate 130 is attached to the tip (front side) of the sleeve 122 of the reversing shaft 120. The insertion plate 130 is formed of a partially cylindrical thin plate and is inserted between a cylindrical roller 206 and an outer ring 202 described later. The partial cylindrical shape is a shape obtained by dividing the cylinder in the axial direction (vertically). In this embodiment, the insertion plate 130 has a partial cylindrical shape of 180 ° with respect to the center of the sleeve 122. The insertion plate 130 has a shape (radius) along the outer peripheral surface of the sleeve 122, and projects forward from the sleeve 122. At both ends of the distal end 130a of the insertion plate 130, there are slopes 130b having a shape with a partially cylindrical corner cut out. In other words, the slope 130b is a notch that recedes toward the end of the tip 130a.

  FIG. 3 is an exploded partial cross-sectional view illustrating a schematic configuration of the cylindrical roller bearing 200. As shown in FIG. 3A, the cylindrical roller bearing 200 is a double-row roller, and has two sets of cages 230 with rollers. The roller-mounted cage 230 is an assembly in which a plurality of cylindrical rollers 206 are assembled to the cage 210 in advance. The cylindrical roller bearing 200 includes an outer ring 202 having raceways 202a and 202b on the inner peripheral surface, and an inner ring 204 having raceways 204a on the outer peripheral surface. The cylindrical roller 206 is rotatably interposed between the races 202a, 202b, and 204a of the outer ring 202 and the inner ring 204 that are raceways.

  In the center of the inner peripheral surface of the outer ring 202, an outer ring intermediate collar 202c protruding toward the inner diameter side is provided in order to restrict the axial movement of the two rows of cylindrical rollers 206. One end of the inner ring 204 in the axial direction is provided with a collar 204b that protrudes to the outer diameter side. The other end of the inner ring 204 cannot be provided with a collar in order to insert the inner ring 204 into the cage 230 with rollers. Therefore, on the other end side, a labyrinth seal 232 that is fixed to the outer ring 202 is attached (see FIG. 4).

  The cage 210 holds the cylindrical rollers 206 so as to roll apart from each other in the circumferential direction. The cage 210 includes an annular cage body 212 in which a plurality of pockets 220 for holding the cylindrical rollers 206 are formed at predetermined intervals in the circumferential direction, and an annular lid applied to one side of the cage body 212 in the axial direction. 228. The cage main body 212 includes a column portion 214 that forms a pocket 220 and an annular portion 216 that connects the column portion 214. The pocket 220 rotatably holds the cylindrical rollers 206 one by one. When the annular lid 228 is not applied to the cage body 212, the pocket 220 opens in the axial direction. The annular lid 228 is fixed to the column portion 214 of the cage main body 212 by a rivet 228a.

  Further, as shown in FIG. 3B, the pocket 220 is open on both sides in the radial direction. The opening width w 1 on the outer peripheral side and the opening width w 2 on the inner peripheral side of the pocket 220 are formed to be narrower than the diameter D of the cylindrical roller 206. Thus, the cylindrical roller 206 is held in the pocket 220 so as to be able to roll and move in the radial direction without dropping from the cage 210.

  Next, a disassembling method for separating the roller cage 230 from the cylindrical roller bearing 200 using the insertion / extraction jig 100 will be described. 4, 5 and 6 are diagrams for explaining a method of disassembling the cylindrical roller bearing.

  First, as shown in FIG. 4A, the cylindrical roller bearing 200 is installed on the roller 116 of the pedestal 110 in a posture (vertically placed) in which the shaft is substantially horizontal. At this time, the cylindrical roller bearing 200 is open on one side (insert plate 130 side), and one of the double row roller cages 230 is extracted. The open end of the cylindrical roller bearing 200 and the insertion plate 130 face each other. A roller labyrinth seal 232 is attached to the other side of the cylindrical roller bearing 200 (the front side in FIG. 4A), and a pair of cages with rollers 230 are accommodated therein. In the insertion / extraction jig 100, the handle 126 is operated to rotate the reversing shaft 120, and the insertion plate 130 is positioned on the upper side.

  4B and 5 are cross-sectional views of the insertion / extraction jig 100 and the cylindrical roller bearing 200. FIG. As shown in FIG. 4B, movement of the roller-mounted cage 230 accommodated in the cylindrical roller bearing 200 is restricted by a labyrinth seal 232 on the outside and by a collar 202c on the outer ring on the inside. Therefore, conventionally, the roller-mounted cage 230 could not be taken out without disassembling and removing the labyrinth seal 232.

  Therefore, in this embodiment, the cylindrical roller bearing 200 is slid on the roller 116 and the insertion plate 130 is inserted into the outer ring 202. At this time, since the cylindrical roller bearing 200 is installed vertically on the pedestal 110, the cylindrical roller 206 on the upper side of the cage with rollers 230 falls downward (inward in the radial direction) by its own weight, and the cylindrical roller 206 and the outer ring A gap is formed between the flange 202c. Therefore, as shown in FIG. 5A, the insertion plate 130 can be easily inserted between the cylindrical roller 206 and the outer ring collar 202c without damaging the cylindrical roller 206.

  In the roller-mounted cage 230, the cylindrical roller 206 located directly above falls downward due to its own weight, but the cylindrical roller 206 located diagonally above may not necessarily fall. However, due to the inclination 130b formed at the distal end 130a of the insertion plate 130, the cylindrical roller 206 located obliquely upward is also moved radially inward with the operation of inserting the insertion plate 130. Thus, even if the cylindrical roller 206 has not moved radially inward, the insertion plate 130 can be smoothly inserted. It should be noted that the degree of the inclination 130b of the distal end 130a of the insertion plate 130 is appropriate. As a guide, the cylindrical roller 206 is unlikely to drop from around 45 ° from above in the cage 230 with rollers, so that it is outside 45 ° (total 90 °) from the center of the insertion plate 130 (180 ° in this embodiment). May be inclined 130b.

  And as shown in FIG.5 (b), the handle 126 is operated, the inversion shaft 120 is rotated, and the insertion board 130 is moved below. At this time, the cylindrical roller bearing 200 is also rotated together with the reverse shaft 120. That is, the roller cage 230 and the insertion plate 130 do not rotate relatively. Thereby, it will be in the state where the holder 230 with a roller was put on the insertion board 130. FIG. Then, since the cylindrical roller 206 that has become the upper side of the roller-mounted cage 230 due to the rotation falls downward due to gravity, as a result, all the cylindrical rollers can be moved radially inward.

  In this state, as shown in FIG. 6, the outer ring 202 is slid on the roller 116 and pulled to pull out the insertion plate 130 from the outer ring 202. As a result, the caged holder 230 remains on the insertion plate 130, so that the caged roller 230 and the outer ring 202 can be easily separated.

  The cylindrical roller bearing 200 can be assembled by executing the above disassembling method in the reverse order.

  That is, first, as shown in FIG. 6, the roller-mounted cage 230 is placed on the insertion plate 130. Next, the outer ring 202 is placed on the roller 116 of the pedestal 110 so that the axis thereof is substantially horizontal. Then, the outer ring 202 is slid, and the cage with rollers 230 placed on the insertion plate 130 is inserted into the outer ring 202 as shown in FIG. Then, as shown in FIG. 5A, the handle 126 is operated to rotate the insertion plate 130 to the upper side around the axis of the cylindrical roller bearing 200. At this time, the cylindrical roller bearing 200 is also rotated together with the reverse shaft 120. As a result, the cylindrical roller 206 below the retainer 230 falls into the outer ring 202, so that the end surface of the cylindrical roller 206 is caught by the collar 202c in the outer ring. Then, by pulling the outer ring 202 as shown in FIG. 4 (b), only the insertion plate 130 is extracted, leaving the roller retainer 230 in the outer ring 202 as shown in FIG. 4 (a).

  Thus, when the roller-mounted cage 230 is placed on the insertion plate 130, the upper cylindrical roller 206 moves radially inward by its own weight, and the lower cylindrical roller 206 is pushed by the insertion plate 130 and radially inward. Move to. Since all the cylindrical rollers 206 are moved inward in the radial direction, the cage with rollers 230 can be easily inserted into the outer ring 202, and the cylindrical roller bearing 200 can be easily assembled.

  In the above embodiment, a double row bearing has been described as an example. However, the present invention can be similarly applied to a single row bearing. Further, the cylindrical roller bearing 200 has been described as being slid, but the insertion plate 130 may be moved and inserted into the cylindrical roller bearing 200. Further, the rotation mechanism of the insertion plate 130 may be driven by a motor instead of manually.

  Although the preferred embodiments of the present invention have been described above with reference to the accompanying drawings, it goes without saying that the present invention is not limited to such examples. It will be apparent to those skilled in the art that various changes and modifications can be made within the scope of the claims, and these are naturally within the technical scope of the present invention. Understood.

  The present invention relates to an insertion / extraction jig, a disassembling method, and an assembling method for inserting / extracting a cage with a roller of a cylindrical roller bearing.

DESCRIPTION OF SYMBOLS 100 ... Insertion / extraction jig | tool, 110 ... Base, 112 ... Base, 114 ... Housing, 114a ... Rotation hole, 114b ... Notch, 116 ... Roller, 118 ... Holding lid, 120 ... Reversing shaft, 122 ... Sleeve, 124 ... Flange, 126 ... handle, 130 ... insert plate, 130a ... tip, 130b ... inclined, 200 ... cylindrical roller bearing, 202 ... outer ring, 202a ... raceway, 202b ... raceway, 202c ... collar of outer ring, 204 ... inner ring, 204a ... raceway, 204b ... collar 206 ... cylindrical roller 210 ... retainer 212 ... retainer body 214 ... pillar part 216 ... annular part 220 ... pocket 228 ... annular lid 228a ... rivet 230 ... retainer with roller 232 ... Labyrinth seal

Claims (4)

A cylindrical roller bearing insertion / extraction jig,
A pedestal that installs the cylindrical roller bearing in a posture in which its axis is substantially horizontal;
An insertion plate made of a partially cylindrical thin plate and inserted between the cylindrical roller and the outer ring of the cylindrical roller bearing;
An insertion / extraction jig for a cylindrical roller bearing, comprising: a rotation mechanism that rotates the insertion plate about an axis of the cylindrical roller bearing.   The cylindrical roller bearing insertion / extraction jig according to claim 1, wherein both ends of the distal end of the insertion plate have slopes formed by cutting out the corners of a partial cylindrical shape. A method of disassembling a cylindrical roller bearing,
In a state where the cylindrical roller bearing has a posture in which the axis thereof is substantially horizontal, and the upper cylindrical roller is dropped downward in a cage with rollers in which a plurality of cylindrical rollers are assembled to the cage,
Insert an insertion plate made of a thin plate with a partial cylindrical shape between the upper cylindrical roller and the outer ring,
Rotate the insertion plate and cylindrical roller bearing until the insertion plate is on the lower side,
A method for disassembling a cylindrical roller bearing, wherein the insertion plate is removed from the outer ring in a state where the cage with rollers is placed on the insertion plate. A method of assembling a cylindrical roller bearing,
Place the cage with rollers, which is assembled with a plurality of cylindrical rollers on the cage, on the insertion plate consisting of a thin plate with a partial cylindrical shape,
With the outer ring of the cylindrical roller bearing and the cage with rollers in a posture in which the axis thereof is substantially horizontal, the cage with rollers placed on the insertion plate is inserted into the outer ring,
Rotate the insertion plate and cylindrical roller bearing until the insertion plate is on the upper side,
A method of assembling a cylindrical roller bearing, wherein the retainer with rollers is left in the outer ring and the insertion plate is removed from the outer ring.

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