JPS63312512A - Combined cylindrical roller bearing - Google Patents

Abstract

PURPOSE:To enable a large size product to be manufactured in easy handling, by dislocating inner/outer rings, dividable on a plane including an axis and divided into two on a plane perpendicular to the axis, at the phases of radially divided planes to each other so as to combine them into one body dividably. CONSTITUTION:Inner/outer rings 1, 5 are divided on planes 23, 26 perpendicular to the axial direction so as to form 1st/2nd inner ring portions 2, 3 and 1st/2nd outer ring portions 6, 7. Furthermore, they are divided into two on a plane perpendicular to the radial direction including an axis and these phases are dislocated by 90 deg. so as to be assembled into one body by means of bolts 30, 33. Also a thrust roller is divided into 9a, 9b so as to be held by holders 10, 14 equally divided into 3 on a radial plane together with radial thrust rollers 10, 11, and seals 48, 49, 54 are held by 1st/2nd/3rd seal holders 17, 18, 19 divided into 2 respectively. Accordingly, the respective portions can be divided into proper sizes being easy to handle and a very large product can be manufactured easily.

Description

[Detailed description of the invention] <Industrial application field> The present invention relates to a composite cylindrical roller bearing.

<Prior Art> Conventionally, there is a compound cylindrical roller bearing shown in FIG. 4, which is used as a cutter head bearing for a tunnel excavator or a turntable bearing for an ultra-large construction machine. The outer ring lO1 of this composite cylindrical roller bearing has an annular recess on its inner periphery, and a through hole 105 that penetrates in the axial direction on its outer periphery, and a bolt (not shown) that passes through this through hole 105.
is fixed to another stationary member (not shown). The inner ring 106 located on the inner periphery of the outer ring 101 has an annular convex portion on the outer periphery that fits into the recess, and has an inner circumferential surface 1
06a is provided with a drive gear 107.

Above outer ring 10! axially opposing surfaces 109a, 110a and surface 109b of the concave portion and the convex portion of the inner ring 106.

Thrust rollers 114 and 115 held by cages 111 and 112 are arranged between the rollers 110b and 110b, respectively. On the other hand, the opposing circumferential surfaces 116a of the outer ring 101 and the inner ring 106
A radial roller 119 held by a cage 118 is arranged between and zeb.

The inner ring 106 rotates around the fixed outer ring 101 by a rotational force transmitted from the outside via a drive gear 107, and is fixed to the outer end surface 106b with a bolt (not shown) that is screwed into a screw hole 117. Do not rotate the table. Seal holding plate 120° 121 is for seals 122, 123
It is an annular plate for holding the bolts 125, 12.
6 is fixed to the outer ring 101 or the inner ring 106.

Here, during assembly, the outer ring 101 can be divided into an upper outer ring part 102 and a lower outer ring part 103 along a plane 104 perpendicular to the axis.

<Problems to be solved by the invention> By the way, in recent years, as tunnel boring machines, super-large construction machines, etc. have become even larger, super-ultra-large products have been required for the composite cylindrical roller bearings used therein. It's starting to happen.

However, the above conventional composite cylindrical roller bearing has an upper outer ring portion 102, a lower outer ring portion 103, an inner ring 106, and a cage 111.
, 112, retainer 11B and seal retaining plate 120.1
21 are formed integrally with each other, they are large and heavy, making them difficult to handle during transportation or repair, and the size and weight are limited due to handling, making it difficult to manufacture extremely large products. The problem is that it is possible.

Therefore, an object of the present invention is to provide a composite cylindrical roller bearing that allows component parts such as an inner ring and an outer ring to be separated, making it easier to handle during transportation or repair, and making it possible to manufacture extremely large products. It's about doing.

<Means for Solving the Problems> In order to achieve the above object, in the present invention, the inner ring has a first inner ring part and a second inner ring part divided by a plane perpendicular to the axis, and The inner ring portion and the second inner ring portion are each divided by a plane including the axis, the first inner ring portion and the second inner ring portion are separably coupled to each other by shifting the phases of the dividing planes in the radial direction, and the outer ring is , has a first outer ring part and a second outer ring part divided by a plane perpendicular to the axis, the first inner ring part and the second outer ring part are each divided by a plane including the axis, and the first outer ring part and the second outer ring part are divided by a plane including the axis. The second outer ring portion is integrally and separably coupled with the phases of the radial dividing planes being shifted from each other, and each retainer that holds the thrust roller is divided by a plane that includes the shaft, and the retainer that holds the radial roller The container is divided by a plane including the axis, and the seal holding plate is divided by a plane perpendicular to the axis.

<Operation> The inner ring of this composite cylindrical roller bearing is divided into a first inner ring part and a second inner ring part on a plane perpendicular to the axis, and furthermore, the first inner ring part and the second inner ring part are shifted in phase from each other when coupled. They are each divided by a radial dividing plane. On the other hand, the outer ring is divided into a first outer ring part and a second outer ring part on a plane perpendicular to the axis, and furthermore, the first outer ring part and the second outer ring part are divided by radial dividing planes whose phases are shifted from each other when coupled. are divided into each.

Furthermore, the cage of the thrust roller arranged between the axially opposing surfaces of the fitting part on the outer periphery of the inner ring and the fitting part on the inner periphery of the outer ring has a radial dividing surface including the shaft. divided,
The cage of the radial roller arranged between the opposing circumferential surfaces of the inner ring and the outer ring is divided by a radial dividing plane that includes the shaft,
Further, the seal retaining plate that retains the seal is divided along a radial dividing plane that includes the shaft.

Therefore, each component of the composite cylindrical roller bearing is divided into sizes that are easy to handle during transportation, repair, and the like.

<Example> Hereinafter, the present invention will be explained in detail with reference to illustrated embodiments.

In FIG. 1, 1 is an inner ring divided into a first inner ring part 2 and a second inner ring part 3 on a plane 23 perpendicular to the axial direction, and 5 is a first outer ring part 6 on a plane 26 perpendicular to the axial direction. and second outer ring portion 7
The outer ring is divided into two parts.

The first inner ring portion 2 is an annular member having a substantially rectangular cross-sectional shape, and the second inner ring portion 3 is an annular member having a curved cross-section and a convex portion 3a on the outer periphery. Outer end surface 2 of second inner ring portion 3
Screw holes 20 are provided at equally spaced positions on the circumference of 5, and other members can be fixed onto the outer end surface 25 with bolts that are screwed into the screw holes 20. End surface 23b of second inner ring portion 3
In the first inner ring portion 2 with the end surface 23a in contact with the
At positions equidistant on the circumference of the outer end surface 27, there are a plurality of stepped holes 28, 28, .
This stepped hole 28.28. A female screw is provided on the inner surface of... Moreover, the first inner ring part 2 and the second inner ring part 3 can each be divided into two equal parts along a plane in the radial direction including the axis. Therefore, the inner ring 1 can be divided into four parts: two first inner ring parts 2 and two second inner ring parts 3.

When the first inner ring part 2 divided into two parts and the second inner ring part 3 divided into two parts are integrally joined to form the inner ring l, this is done as shown in FIG. That is, first,
Radial dividing surface 2 of one divided first inner ring portion 2a
C and the radial dividing surface 3C of one of the divided second inner ring parts 3a are shifted by, for example, 90 degrees from each other, so that half of the end face 23a of the one of the first inner ring parts 2a and the one of the second inner rings are separated. Half of the end surface 23b of the portion 3a is connected to the stepped hole 28.2.
B, . . . are brought into contact so that their positions match. Next, fixing bolts 30, 30. ... is inserted and screwed together with the female thread to connect one first inner ring part 2a and one second inner ring part 3a. Next, the other divided second inner ring part 3b is attached to the end face 23a to which the one second inner ring part 3a of the one first inner ring part 2a is not connected.
are connected in the same manner as described above, and finally, the other divided first inner ring part 2b is connected to the unconnected end surface 23b of the second inner ring part 3 in the same manner as described above. At that time,
As shown in FIG. 1, fixing bolts 30, 30. The head of... is the step part 28a, 28a,... of the service hole 2B, 28°...
... and does not protrude outside the outer end surface 27, so that it does not get in the way when a pond member is installed on the outer end surface 27. The cross-sectional shape of the inner ring l formed by joining as described above is approximately T-shaped with a convex portion 3a on the outer periphery. Fixed to another stationary member.

The first outer ring portion 6 is an annular member having a cross section with a convex portion 6a, and the second outer ring portion 7 is an annular member having a cross section with a convex portion 7a. In the first outer ring part 6 with the end face 26a in contact with the end face 26b of the second outer ring part 7, substantially central shafts of the second outer ring part 7 are placed in the axial direction at positions equidistant on the circumference of the outer end face 31. A plurality of stepped holes 32, 32.
... are provided, and these stepped holes 32, 32 . Provide a female screw on the inner surface of...

Further, the first outer ring portion 6 and the second outer ring portion 7 are each
It can be divided into two halves by a radial plane containing the axis. Therefore, the outer ring 5 can be divided into four parts: two first outer ring parts 6 and two second outer ring parts 7.

When forming the outer ring 5 by integrally joining the first outer ring part 6 divided into two parts and the second outer ring part 7 divided into two parts, the same procedure as in the case of the inner ring 1 described above is performed. , as shown in FIG. 3, the fixing bolts 33, 33 . Combine with... The cross-sectional shape of the outer ring 5 formed by joining as described above is approximately U-shaped, having a recess that fits into the projection 3a of the inner ring 1, as shown in FIG. In addition, on the outer periphery of the outer ring 5,
Through holes 37 passing through in the axial direction are arranged at equal intervals on the circumference.
37. ... is provided, and a bolt (not shown) passing through the through hole 37.37°...
A table (not shown) placed on top is fixed.

An annular retainer IO for holding the rollers is arranged between axially opposing surfaces 35a and 23b of the convex portion 3a of the inner ring l and the concave portion of the outer ring 5. This cage 10 rotatably holds cylindrical thrust rollers 9a and 9b on a plurality of shafts 10a provided in the radial direction at equidistant positions on the circumference, and is divided into three equal parts on a radial plane. Can be divided. Similarly, another retainer 12 is disposed between the axially opposing surfaces 36a and 36b of the convex portion 3a of the inner ring 1 and the concave portion of the outer ring 5. This retainer 12 rotatably retains the thrust rollers 11 at equally spaced positions on the circumference and can be divided into three equal parts on a plane in the radial direction. The thrust rollers 9a and 9b allow the outer ring 5 carrying the workpiece to rotate around the fixed inner ring 1, and
It is designed to receive thrust loads. Here, in order to receive a large thrust load, it is necessary to increase the size of the thrust roller. However, when the thrust roller is made larger, a large difference occurs in the rotational speed between the outer and inner parts of the thrust roller, causing the outer or inner part to slip.

Therefore, in this embodiment, the thrust roller is placed in the outer part 9a.
and an inner part 9b, so that the outer part 9a and the inner part 9b can rotate at different rotational speeds, and a large thrust roller can receive a large thrust load. On the other hand, the other thrust roller 11 receives the moment generated in the outer ring 5 due to the uneven thrust load.

A retainer 15 is arranged between opposing circumferential surfaces 38a and 38b of the inner ring 1 and outer ring 5. This retainer 15 rotatably retains the radial rollers 14 at equally spaced positions on the circumference and can be divided into three equal parts on a plane in the radial direction.

From the outer peripheral surface of the outer ring 5, the thrust rollers 9a, 9
Holes 43, 44.45 penetrating through the space 39.40 where the rollers 11 and 11 are arranged and the space 42 where the radial roller 14 is arranged are provided respectively, and the holes 43, 44. 45, holes 46, 46.
... are provided to enable lubricating oil to be supplied to the spaces 39, 40 and 42.

An annular seal 48 for preventing water, dust, etc. from entering the space 39 is inserted into the stepped portion 27a provided on the outer end surface 27 of the first inner ring portion 2. It is held by the first seal holding plate 17. In addition, the first
Another annular seal 49 is arranged on the outer periphery of the outer end surface of the seal retaining plate 17, and this seal 49 is connected to a second annular seal 49.
It is held by a seal holding plate 18. Above 1. The second seal retaining plates 17 and 18 are each divided into two equal parts in the radial plane, and when connected, are connected to each other with bolts 50, and at the same time, the second seal holding plates 17 and 18 are connected to each other by a pole 51 that reaches approximately the middle of the first inner ring portion 2. 1 is fixed on the outer end surface 27 of the inner ring portion 2. Further, an annular seal 54 for preventing water, dust, etc. from entering the space 40 is inserted into a stepped portion 52a provided on the outer end surface 52 of the convex portion 7a of the second outer ring portion 7, This seal 54 is held by the third seal holding plate 19. The third seal holding plate 19 is fixed onto the outer end surface 52 of the second outer ring portion 7 with bolts 55. The third seal holding plate 19 is the third seal holding plate 19. Like the second seal retaining plate 17,18, it can be divided into two equal parts in the radial plane.

In this way, the inner ring l of the composite cylindrical roller bearing in this embodiment has two first inner ring parts 2 and two second inner ring parts 3, and the outer ring 5 has two first outer ring parts 6 and two second outer ring parts. In part 7,
Furthermore, the cages 10, 12 for the thrust rollers are each divided into three parts, the cages 15 for the radial rollers are divided into three parts, and the cages 10, 12 for the radial rollers are divided into three parts. The second and third seal retaining plates 17, 18, 19 can each be divided into two parts. Therefore, it becomes easy to handle during transportation, repair, etc., and it becomes possible to manufacture extremely large products without being limited by size or weight. Further, the first outer ring part 6 and the second outer ring part 7 are connected so that they can be redivided into one piece by shifting their radial dividing planes from each other.

Therefore, the dividing surface 6c of the first outer ring portion 6 and the second outer ring portion 7
The dividing surface 7c does not hit the thrust rollers 9a, 9b, 11 and the radial roller 14 at the same time, and this composite cylindrical roller bearing can rotate smoothly.

In the above embodiment, an annular convex portion is provided on the outer periphery of the inner ring l, and an annular recess is provided on the inner periphery of the outer ring 5. However, a recess is provided on the outer periphery of the inner ring, and the recess is fitted on the inner periphery of the outer ring. A convex portion may also be provided. In addition, inner ring, outer ring, thrust roller cage,
The number of divisions of the radial roller cage and seal retaining plate is as follows:
The number is not limited to the number described in the above embodiments, and may be determined to be an optimal number taking into consideration the capacity and workability of the transport vehicle, the size and weight of the entire bearing, etc.

<Effects of the Invention> As is clear from the above, the composite cylindrical roller bearing of the present invention has an inner ring formed by a first inner ring portion and a second inner ring portion that are divided by a plane perpendicular to the axis, and the first inner ring portion and the second inner ring portion are divided by a plane perpendicular to the axis. The second inner ring portions are each splittable on a plane including the axis, and the outer ring is formed by a first outer ring portion and a second outer ring portion that are separated on a plane perpendicular to the axis, and the first and second outer ring portions are separated. The two sets of retainers that hold the thrust rollers, the retainers that hold the radial rollers, and the seal retaining plate are configured to be divisible on the plane that includes the shafts, respectively.
The inner ring, outer ring, thrust roller cage, radial roller cage, and seal retaining plate can be divided into sizes that are easy to handle during transportation or repair. This makes it easier to manufacture ultra-large products without being limited by size or weight.

Further, the inner ring is formed by integrally and separably joining the first inner ring part and the second inner ring part by shifting the phases of the dividing planes in the radial direction from each other, and the outer ring is formed by combining the first outer ring part and the second outer ring part in a separable manner. Since the phases of the radial dividing surfaces are shifted from each other and the dividing surfaces are integrally and separably connected, the dividing surfaces of the first inner ring portion and the second inner ring portion may be formed at the same time or at the same time. The dividing surface of the outer ring portion and the dividing surface of the second outer ring seat do not hit the thrust roller or the radial roller at the same time, allowing smooth rotation.

[Brief explanation of drawings]

Fig. 1 is a sectional view of an embodiment of the composite cylindrical roller bearing of the present invention, Fig. 2 is an explanatory diagram of the connection of the inner ring, Fig. 3 is an explanatory view of the connection of the outer ring, and Fig. 4 is a conventional composite cylindrical roller bearing. FIG. 3 is a cross-sectional view of the bearing. l... Inner ring, 2... First inner ring part, 3... Second inner ring part, 5... Outer ring, 6... First outer ring part, 7... Second
Outer ring portion, 9a, 9b, 11... thrust roller,
10.12... Thrust roller cage, 14... Radial roller, Summer 5... Radial roller cage, 17.
...First seal holding plate, 18...Second seal holding plate, 19...Third seal holding plate, 48.49.54...
sticker. Patent applicant Koyo Seiko Co., Ltd. Agent Patent attorney Aoyama Ao and two others Figure 2 Figure 3

Claims (1)

[Claims] (1) an inner ring having an annular fitting part on the outer periphery; an outer ring having an annular fitting part on the inner periphery that fits into the fitting part of the inner ring;
Thrust rollers held in two sets of cages arranged between axially opposing surfaces of the fitting portion of the inner ring and the fitting portion of the outer ring, and the opposing circumferential surfaces of the inner ring and outer ring. A composite cylindrical roller bearing comprising radial rollers held in a cage disposed between them and a seal holding plate holding a seal, the inner ring having a first inner ring divided along a plane perpendicular to the axis. and a second inner ring part, the first inner ring part and the second inner ring part are each divided by a plane including the axis, and the first inner ring part and the second inner ring part are divided by the phase of the dividing plane in the radial direction. The outer ring has a first outer ring part and a second outer ring part that are separated by a plane perpendicular to the axis, and the first inner ring part and the second outer ring part are connected to each other so as to be separated from each other. The first outer ring part and the second outer ring part are separated by a plane including the axis, and are separably coupled to each other by shifting the phases of the dividing planes in the radial direction from each other, and each retainer holding the thrust roller is , each of which is divided by a plane containing the shaft, the retainer for holding the radial rollers is divided by a plane including the shaft, and the seal retaining plate is divided by a plane perpendicular to the shaft. Cylindrical roller bearing.