JP2013117289A - Cylindrical roller bearing - Google Patents

Abstract

In a cylindrical roller bearing using a machined cage, a cylindrical roller bearing that can prevent the cylindrical roller from falling off with a simple configuration and can reduce the cost is provided.
SOLUTION: An inner ring 3, an outer ring, a plurality of cylindrical rollers 4 arranged between a raceway surface of the inner ring 3 and a raceway surface of the outer ring 3, and a cylindrical roller 4 in a pocket hole 53 provided in a circumferential direction. In a cylindrical roller bearing comprising a cage 5 that is held and guided in sliding contact with the raceway surface or raceway surface of the inner ring 3 or the outer ring, the cage 5 is a non-guide surface on the opposite side of the guided guide surface. The holding ring 6 is attached to the non-guide surface, and the holding ring 6 divides at least one place in the circumferential direction from a dropout prevention hole 61 provided at a position overlapping the pocket hole 53 in the radial direction. And a joining means for joining both ends in the circumferential direction of the dividing portion 64, and the circumferential length of the drop-off prevention hole 61 is formed smaller than the diameter of the cylindrical roller 4.
[Selection] Figure 2

Description

  The present invention relates to a cylindrical roller bearing using a machined cage.

  A large cylindrical roller bearing that supports a rotation support part of a steel facility or the like includes a cage that holds a plurality of cylindrical rollers so as to be able to roll on the inner surface of a pocket hole at predetermined intervals between an inner ring and an outer ring. . As this cage, since it is large and requires strength, a machined type cage produced by machining is often used.

  For example, in the assembly of this cylindrical roller bearing, in order to prevent the cylindrical roller from falling out of the pocket hole by mounting a hollow type cage inside the outer ring and mounting the cylindrical roller in the pocket hole of this cage. This is carried out by attaching an inner ring after taking a drop-off prevention means to be described later in the cage.

  The drop-off preventing means is performed by providing a claw part in the cage that restricts the cylindrical roller attached to the pocket hole from dropping inward, and bending the claw part. (Patent Document 1)

Japanese Utility Model Publication No. 5-12753

  However, the cylindrical roller bearing described above requires a lot of time for machining due to the complicated shape of the claw portion of the machined cage that prevents the cylindrical roller from falling off, and the claw portion is bent. Since the required dimensional accuracy is severe, skill is required and the cost is increased. Thus, a cylindrical roller bearing using a machined cage has a problem of reducing the cost by preventing the cylindrical roller from falling off with a simple configuration.

  The present invention has been made to solve such a problem, and in a cylindrical roller bearing using a hollow type cage, the cylindrical roller is prevented from falling off with a simple configuration, and the cost is reduced. It is an object of the present invention to provide a cylindrical roller bearing that can be used.

In order to solve the above problems, the structural features of the cylindrical roller bearing according to claim 1 include an inner ring having a raceway surface on an outer peripheral surface, an outer ring having a raceway surface on an inner peripheral surface, and a raceway surface of the inner ring. A plurality of cylindrical rollers disposed between the outer ring raceway surface and a plurality of circumferentially provided pocket holes, the cylindrical rollers are held in a rollable manner, and the inner ring or the outer ring raceway surface. A cylindrical roller bearing provided with a cage guided in sliding contact with
The retainer has a non-guide surface on the opposite side of the guided surface;
A holding ring attached to the non-guide surface;
The retaining ring is a drop-off prevention hole provided at a position overlapping the pocket hole in the radial direction,
A dividing portion for dividing at least one place in the circumferential direction;
Joining means for joining the circumferential ends of the divided portion;
The length of the drop-off prevention hole in the circumferential direction is smaller than the diameter of the cylindrical roller.

  According to the cylindrical roller bearing of claim 1, the cylindrical roller bearing is assembled by mounting the cage on the raceway surface of either the inner ring or the outer ring, mounting the cylindrical roller in the pocket hole of the cage, and in the circumferential direction. A holding ring provided with a dividing portion to be divided is attached to the non-guide surface of the cage, both ends of the dividing portion are joined, and the other of the inner ring and the outer ring is attached. In the cylindrical roller bearing, the drop-off prevention hole of the holding ring is smaller than the diameter of the cylindrical roller in the circumferential direction. Therefore, the cylindrical roller can be prevented from falling off with a simple configuration, and the cost can be reduced.

  A structural feature of the cylindrical roller bearing according to claim 2 is that an axial length of the retaining ring is formed smaller than an axial length of the cage.

  According to the cylindrical roller bearing of the second aspect, since the axial length of the retaining ring is smaller than the axial length of the cage, it is simple without reducing the degree of freedom when using the cylindrical roller bearing. With a simple structure, the cylindrical roller can be prevented from falling off and the cost can be reduced.

  A structural feature of the cylindrical roller bearing according to claim 3 is that the cylindrical roller bearing includes a locking unit that locks the cage and the retaining ring in the axial direction and the circumferential direction.

  According to the cylindrical roller bearing of claim 3, since the cage and the retaining ring are locked, the retaining ring moves in the axial direction or the circumferential direction and does not contact the cylindrical roller. There is no deterioration in performance, and the cylindrical roller can be prevented from falling off with a simple configuration, and the cost can be reduced.

A structural feature of the cylindrical roller bearing according to claim 4 is that the locking means includes:
The non-guide surface of the cage has a circumferential groove that is recessed inward in the radial direction, the walls at both ends of the circumferential groove each have a recess at one location, and the retaining ring is attached to the circumferential groove Thus, both ends in the axial direction have convex portions that protrude outward in the axial direction and engage with the concave portions.

  According to the cylindrical roller bearing of claim 4, the retainer and the retaining ring are locked by engaging the concave portion of the retainer and the convex portion of the retaining ring. Since it is small, it can be easily manufactured, and the cylindrical roller can be prevented from falling off with a simple configuration, and the cost can be reduced.

A structural feature of the cylindrical roller bearing according to claim 5 is that the locking means is:
Each of the holding rings has at least one bending portion at each of the both ends in the axial direction at the outer ends in the axial direction and at the one end of each of the both ends in the radial direction so as to project both ends of the cage in the axial direction. That is.

  According to the cylindrical roller bearing of claim 5, since the locking means can be realized only by the holding ring, and the holding ring can be realized only by pressing the plate material, the cylindrical roller can be prevented from falling off with a simple configuration. Can greatly reduce the cost.

  ADVANTAGE OF THE INVENTION According to this invention, in the cylindrical roller bearing using the hollow type cage, it is possible to provide a cylindrical roller bearing that can prevent the cylindrical roller from falling off with a simple configuration and can reduce the cost.

It is an axial sectional view of the cylindrical roller bearing which is one embodiment of the present invention. (A) is AA sectional drawing of FIG. 1, (b) is BB sectional drawing of Fig.2 (a). It is a figure explaining the latching means which latches a holder and a holding ring. It is a figure explaining the latching means which latches a holder and a holding ring.

Hereinafter, an embodiment in which the cylindrical roller bearing 1 of the present invention is embodied will be described with reference to the drawings.
FIG. 1 is an axial cross-sectional view of an embodiment of the present invention, for example, a cylindrical roller bearing 1 that is a large-sized bearing that supports a rotation support portion of a steel facility or the like. This will be described with reference to FIG.

  The cylindrical roller bearing 1 includes an outer ring 2 having a raceway surface 21 on an inner peripheral surface, an inner ring 3 having a raceway surface 31 on an outer peripheral surface, and raceway surfaces 21 and 31 between the outer ring 2 and the inner ring 3. A plurality of cylindrical rollers 4 arranged so as to be able to roll in a direction, and a guide surface 51 guided in sliding contact with the outer peripheral surface of the inner ring 3 to hold the cylindrical rollers 4 at predetermined intervals in the circumferential direction. The cage 5 and the retaining ring 6 mounted on the non-guide surface 52 opposite to the guide surface 51 of the cage 5 are configured.

2A is a cross-sectional view taken along the line AA in FIG. 1, and FIG. 2B is a cross-sectional view taken along the line BB in FIG. 2A. This will be described with reference to FIGS. 2 (a) and 2 (b).
The cage 5 has pocket holes 53 that hold the cylindrical rollers 4 at a plurality of locations at predetermined intervals in the circumferential direction. The pocket hole 53 is formed such that the circumferential length Y2 is slightly larger than the diameter X of the cylindrical roller 4, and holds the cylindrical roller 4 in a rollable manner. The cage 5 is, for example, a machined type cage that is manufactured by machining because it has a large diameter of 250 mm and requires strength. For example, brass is used as the material. It is done.

  The retaining ring 6 has a dropout prevention hole 61 that is disposed at a position overlapping the pocket hole 53 in the radial direction. The dropout prevention hole 61 is formed such that the circumferential length Y1 is slightly smaller than the diameter X of the cylindrical roller 4 and the axial length W1 is slightly larger than the axial length W2 of the cylindrical roller 4. . Thereby, the holding ring 6 prevents the increase in torque by preventing the cylindrical roller 4 from slidingly contacting the drop-off preventing hole 61. As a material of the retaining ring 6, for example, SPCC of a cold rolled steel plate is used.

  The holding ring 6 is formed such that the axial length W3 is smaller than the axial length W4 of the cage 5. As a result, the retaining ring 6 does not protrude outward from the axial end surface of the bearing, so that the degree of freedom in using the bearing is not reduced. Further, when the sealing device is attached to both ends of the bearing in the axial direction, the retaining ring 6 does not prevent the sealing device from being attached.

  In assembling the cylindrical roller bearing 1, the cage 5 is mounted on the outside of the inner ring 3, and the cylindrical roller 4 is mounted in the pocket hole 53 of the cage 5. Subsequently, the holding ring 6 having the dividing portion 64 divided at one place in the circumferential direction is expanded and attached to the outside of the cage 5, and after the installation, the holding ring 6 is reduced in diameter to reduce the circle of the dividing portion 64. The inner ring assembly 11 is formed by joining both ends in the circumferential direction by welding or the like (joining means). Then, the outer ring 2 is mounted on the outer side of the inner ring assembly 11.

  Thereby, the cylindrical roller bearing 1 has the dropout prevention hole 61 whose circumferential length Y1 is smaller than the diameter X of the cylindrical roller 4 at the stage of the inner ring assembly 11. It is possible to prevent falling off radially outward.

  Further, the machining of the cage 5 is easy and requires no skill since it only needs to machine the pocket holes after being machined into a cylindrical shape.

  The holding ring 6 is easy to manufacture because it is only necessary to press the outer shape and the drop-off preventing hole from the plate material.

  As described above, according to the cylindrical roller bearing 1 according to the present embodiment, the retaining ring 6 is attached to the non-guide surface 52 of the retainer 5, and the dropout prevention hole 61 included in the retaining ring 6 is in the circumferential direction. Since it is smaller than the diameter of the cylindrical roller 4, it is possible to prevent the cylindrical roller 4 from falling out of the pocket hole 53 radially outward. In addition, the configuration for holding the cylindrical roller 4 to prevent the dropout is only to machine the cylindrical shape and the pocket hole 53 in the cage 5, and the holding ring 6 only presses the outer shape and the dropout prevention hole 61. Since it is simplified, the cost can be reduced.

  In the above embodiment, the retaining ring 6 is fitted to the non-guide surface 52 of the retainer 5 with a reduced diameter to prevent the axial and circumferential shifts. However, the present invention is not limited to this. Instead, for example, the present invention may be applied to a configuration that reliably prevents deviation by providing a locking unit that locks the cage 5 and the holding ring 6 in the axial direction and the circumferential direction. Hereinafter, the configuration will be described with reference to FIGS. 3 and 4.

FIG. 3 is a view for explaining a locking means for locking the cage 5 and the holding ring 6. FIG. 3A is a view for explaining a locking means as a modification of FIG. 2A, FIG. 3B is a sectional view taken along the line CC in FIG. 3A, and FIG. These are DD sectional drawings of Drawing 3 (a).
As shown in FIGS. 3A, 3B, and 3C, the holding ring 6 protrudes outward in the axial direction and radially inward at both ends in the axial direction, and extends in the axial direction of the cage 5. Each of the bent portions 62 sandwiching both ends is formed in one place. Thereby, the holder | retainer 5 and the holding | maintenance ring 6 can be latched to an axial direction and the circumferential direction, and the shift | offset | difference of the holding | maintenance ring 6 can be prevented reliably. The manufacturing of the holding ring 6 can reduce the cost because the outer shape, the drop-off preventing hole 61, and the bent portion 62 are formed from the plate material by a single press process. Further, since the retaining ring 6 is displaced and does not come into contact with the cylindrical roller 4, there is no increase in torque, damage to the cylindrical roller 4 or lowering of the lubrication performance, and the cylindrical roller 4 can be prevented from falling off with a simple configuration, and the cost can be reduced. .
In addition, although the bending part 62 was formed in one place at both ends in the axial direction, the present invention is not limited to this. For example, it is equally arranged in the circumferential direction and formed at three positions at both ends in the axial direction. What is necessary is just to determine suitably from the magnitude | size of the holding | maintenance ring 6, etc. FIG.

FIG. 4 is a view for explaining a locking means for locking the cage 5 and the holding ring 6. 4A is a view for explaining a locking means as a modification of FIG. 2A, FIG. 4B is a cross-sectional view taken along line EE of FIG. 4A, and FIG. These are FF sectional drawing of Fig.4 (a).
As shown in FIGS. 4A, 4 </ b> B, and 4 </ b> C, the cage 5 has a non-guide surface 52 formed with a circumferential groove 54 that is recessed inward in the radial direction. Each wall has a recess 55 formed at one location. The retaining ring 6 is attached to the circumferential groove 54 and has convex portions 63 that protrude outward in the axial direction and engage with the concave portions 55 at both ends in the axial direction. Thereby, the holder | retainer 5 and the holding | maintenance ring 6 can be latched to an axial direction and the circumferential direction, and the shift | offset | difference of the holding | maintenance ring 6 can be prevented reliably. In addition, since the required dimensional accuracy of the cage 5 and the retaining ring 6 is small, it can be easily manufactured and the cost can be reduced. Further, since the retaining ring 6 is displaced and does not come into contact with the cylindrical roller 4, there is no increase in torque, damage to the cylindrical roller 4 or lowering of the lubrication performance, and the cylindrical roller 4 can be prevented from falling off with a simple configuration, and the cost can be reduced. .
In addition, although the recessed part 55 was formed in each one of the both ends of the circumferential groove 54, it is not restricted to it, For example, it arranges equally in the circumferential direction and is formed in each of the both ends of the circumferential groove 54 at three places. For example, the size of the cage 5 may be determined as appropriate.

  Moreover, in the said embodiment, although the cylindrical roller bearing 1 was set as the structure which consists of a single-row cylindrical roller 4, it is not restricted to it, For example, you may apply to the structure which consists of a double-row cylindrical roller.

  Moreover, in the said embodiment, although the cylindrical roller bearing 1 was set as the structure which does not mount | wear with a sealing device, it is not restricted to it, For example, you may apply to the structure which mounts a sealing device.

  In the above-described embodiment, the cage 5 is guided by the inner ring 3. However, the present invention is not limited to this. For example, the cage may be applied to a configuration guided by the outer ring.

  Moreover, in the said embodiment, although the holding ring 6 was set as the structure which has the part part 64 divided | segmented by one place of the circumferential direction, it is not restricted to it, For example, the structure divided | segmented by multiple places in the circumferential direction You may apply to.

1: cylindrical roller bearing, 2: outer ring, 3: inner ring, 4: cylindrical roller, 5: cage, 6: retaining ring, 11: inner ring assembly, 21: raceway surface, 31: raceway surface, 51: guide surface, 52: Non-guide surface, 53: Pocket hole, 54: Circumferential groove, 55: Recessed part, 61: Drop-off prevention hole, 62: Bending part, 63: Convex part, 64: Dividing part, X: Diameter of cylindrical roller, Y1: Fall-off prevention hole length, Y2: Pocket hole length

Claims (5)

An inner ring having a raceway surface on the outer peripheral surface, an outer ring having a raceway surface on the inner peripheral surface, a plurality of cylindrical rollers disposed between the raceway surface of the inner ring and the raceway surface of the outer ring, and a plurality in the circumferential direction In a cylindrical roller bearing comprising: a cage that is rotatably held in a pocket hole provided at a location, and is guided in sliding contact with a raceway surface of the inner ring or the outer ring,
The retainer has a non-guide surface on the opposite side of the guided surface;
A holding ring attached to the non-guide surface;
The retaining ring is a drop-off prevention hole provided at a position overlapping the pocket hole in the radial direction,
A dividing portion for dividing at least one place in the circumferential direction;
Joining means for joining the circumferential ends of the divided portion;
The cylindrical roller bearing according to claim 1, wherein a length of the dropout prevention hole in a circumferential direction is smaller than a diameter of the cylindrical roller.   2. The cylindrical roller bearing according to claim 1, wherein the length of the holding ring in the axial direction is smaller than the length of the cage in the axial direction.   The cylindrical roller bearing according to claim 1, further comprising a locking unit that locks the retainer and the retaining ring in an axial direction and a circumferential direction. The locking means is
The non-guide surface of the cage has a circumferential groove that is recessed inward in the radial direction, the walls at both ends of the circumferential groove each have a recess at one location, and the retaining ring is attached to the circumferential groove The cylindrical roller bearing according to claim 3, wherein both ends in the axial direction have convex portions that protrude outward in the axial direction and engage with the concave portions. The locking means is
Each of the holding rings has at least one bending portion at each of the both ends in the axial direction at the outer ends in the axial direction and at the one end of each of the both ends in the radial direction so as to project both ends of the cage in the axial direction. The cylindrical roller bearing according to claim 3.

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