WO2016147808A1

WO2016147808A1 - Retainer for tapered roller bearing

Info

Publication number: WO2016147808A1
Application number: PCT/JP2016/055142
Authority: WO
Inventors: 井上　靖之; 径生堀; 克典曽根
Original assignee: Ntn株式会社
Priority date: 2015-03-16
Filing date: 2016-02-23
Publication date: 2016-09-22

Abstract

Provided is a retainer 17 in which a wire 25 for bundling a plurality of segments 20 can easily be arranged and removed in order to facilitate assembly of a tapered roller bearing 1. The retainer 17 is configured such that at least two segments 20 having pockets 16 for retaining tapered rollers 15 are arranged in a circle, wherein the retainer 17 is characterized in that: step parts 28, 29 provided along the edge of the outer-peripheral surface and guiding grooves 26, 27 provided to the step parts 28, 29, the guiding grooves 26, 27 extending along the peripheral direction, are formed in each of the segments 20; and adjacent segments 20 are bundled together by the wire 25, which is arranged around the circle along the guiding grooves 26, 27.

Description

Tapered roller bearing cage

The present invention relates to a split type cage for tapered roller bearings, and more particularly to a split type cage used for tapered roller bearings used in large industrial machines such as wind power generators.

In a tapered roller bearing, a cage for holding the tapered roller is usually used in order to prevent the tapered roller as a rolling element from being unevenly distributed between the inner ring and the outer ring. When the tapered roller bearing is assembled, the tapered roller held in the cage is combined with the inner ring to form an inner ring assembly, and the inner ring assembly is incorporated into the outer ring.

By the way, tapered roller bearings used for wind power generators tend to be large in size in response to the increase in size of power generators for the purpose of increasing power generation.

Since large tapered roller bearings use large tapered rollers and are used in large numbers, the cage may be deformed depending on the weight of the cage or the weight of the rolling elements held. When the cage is deformed, the rotational performance is lowered, and an assembling process in consideration of the deformation is required. Therefore, the assembling process becomes complicated.

When a cage is made large, its strength can be secured by increasing the thickness of the cage, but in general, large parts are difficult to press due to problems with manufacturing equipment, and are pressed due to processing limitations. There is a limit to the plate thickness that can be used for processing. On the other hand, when the cage is manufactured by cutting, the cost is significantly increased compared with the press product, and the waste of material is increased.

In order to solve these problems, the cage is divided into a plurality of separators (spacer type cages) and segments on the dividing plane including the center line, and the divided cages are configured by combining these separators and segments. It has been known. These can reduce the number of tapered rollers held per separator or segment, suppress deformation of the cage, and are intended to improve workability during assembly.

Generally, when a tapered roller bearing using a separation type retainer is incorporated in the apparatus, there is a step of arranging a predetermined number of separators and segments around the inner ring raceway as shown in FIG. When performing this process, since the outer ring is not yet fitted, the separators and segments arranged around the inner ring raceway and the tapered rollers 15 held by the separator are in an unstable state. . For this reason, at the time of assembling the tapered roller bearing, there is a problem that when the inner ring on which the cage 17 is arranged is reversed, the separator and the segment come off and fall off from the inner ring 11.

In order to prevent this problem, Patent Document 1 (International Publication No. WO2013 / 092217) uses a separator or a segment having a connecting member configured to protrude in the axial direction on the side surfaces of the large diameter side and the small diameter side. A split type cage in which adjacent segments are connected by winding a wire around a connecting member is disclosed. These connecting members are provided with through holes extending in the circumferential direction in those provided on the side surface on the small diameter side, and grooves on the outer peripheral surface side in those provided on the side surface on the large diameter side. Adjacent separators and segments are connected by passing a wire through the through hole and groove of the connecting member and adjusting both ends of the wire to a predetermined tension and fixing.

Patent Document 2 (International Publication No. WO 2011/077781) and Patent Document 3 (Japanese Patent Application Laid-Open No. 2007-064437) disclose a large-diameter side engaging piece that protrudes outward in the axial direction at least on the large-diameter side edge. Is provided, and the large-diameter side engaging piece is engaged with an engaging claw provided on the inner ring raceway side surface to prevent the separator or segment from falling off the inner ring.

Further, in Patent Document 4 (International Publication No. WO2007 / 131478), a connecting portion to be connected to an adjacent segment is integrally provided at both ends of the segment, and the connecting portions of the adjacent segments are fitted and connected to each other. A cage is disclosed.

International Publication No. WO2013 / 092217 International Publication No. WO2011 / 077781 JP 2007-064437 A International Publication No. WO2007 / 131478

However, in the segment used in the cage of Patent Document 1, the small-diameter side connecting member is provided over the entire length of the side surface of the segment, while the large-diameter side connecting member is small and spaced. For this reason, the operation of passing the wire through the small-diameter side connecting member is complicated, while the large-diameter side wire is easily detached from the connecting member, and there is still a problem that the segment is detached and dropped during assembly. Moreover, when removing a wire after an assembly, there existed a problem that the removal of the wire of a small diameter side was complicated.

Moreover, since the cage of Patent Document 1 is connected by staking each segment using a wire or the like, if the operation is performed with the wire left, a load is applied to the connecting member, and the cage may be damaged, Even when some segments are exchanged, there is a problem that all the segments need to be disassembled once.

Further, since the roller bearings of Patent Document 2 and Patent Document 3 require a space for disposing the engaging claws on the inner ring, it is necessary to increase the axial dimensions of the inner ring and the outer ring with respect to the axial dimension of the cage. is there. For this reason, compared with a roller bearing having the same inner and outer ring dimensions, there is a problem that the size of the roller has to be relatively reduced, and the rated load of the bearing is reduced.

In addition, the cage of Patent Document 4 sequentially connects the connecting portions of the segments to the adjacent segments, and connects the last one segment to complete the annular shape. If the gap interval to be inserted is narrow, there is a possibility that the segments do not fit due to interference. Also, if the connecting portions of adjacent segments are forcibly connected to the gap into which the last one segment is fitted, a large force is generated in the connecting portions, the connecting portions are damaged, or the segments arranged in an annular shape are distorted. May cause it. For this reason, it is necessary to accurately manage the dimensions of the connecting portions as well as the dimensions of the pockets of each segment, which makes operation difficult.

Also, during operation, the cages of the above-mentioned patent documents are such that the cage is engaged with the inner ring or the segments are connected to each other. Will increase. In order to prevent this, after assembling, the segments constituting the cage may be disengaged. However, the cages according to each of the patent documents described above are difficult to disengage the segments. was there.

Therefore, the present invention is intended to provide a cage capable of facilitating the arrangement and removal of wires for bundling a plurality of segments in order to facilitate the assembly of a tapered roller bearing.

In order to solve the above problems, in the cage of the tapered roller bearing according to the present invention, in the cage constituted by arranging two or more segments having pockets for holding the rolling elements on the circumference, The segment is formed with a step portion provided along a peripheral edge of the outer peripheral surface and a guide groove extending in the circumferential direction provided in the step portion, and adjacent to each other by a wire arranged on the circumference along the guide groove. The matching segments are bundled together.

Further, it is preferable that the stepped portion provided in the segment is provided at both peripheral edges of the segment from the viewpoint of preventing the segment from dropping off during assembly.

The segment is preferably provided with an axial groove extending in the axial direction between adjacent pockets on the outer peripheral surface.

Further, the present invention is configured by arranging two or more separators or segments having a columnar portion connecting the pair of arc-shaped side plate portions arranged in parallel to the axial direction and the both side plate portions on the circumference, In a cage-shaped cage in which the separators or segments are bundled with wires arranged on the circumference along the peripheral edges of both side plate portions, the wire is one side starting from the engaging portion provided at the tip. A first circumferential portion disposed along the peripheral edge of the side plate, and the other peripheral side that is continuous with the first circumferential portion and engaged with the engaging portion and folded back in the axial direction through the columnar portion. And an axial portion extending to the second axial portion, and a second circumferential portion that is continuous with the axial portion and disposed along the periphery of the other side plate portion. In addition, an engagement part is comprised, for example in cyclic | annular form, and it can fold in the axial direction of a binding wire by inserting a binding wire.

Moreover, the wire can be easily removed by including a pull-out wire portion connected to the engaging portion and arranged along the axial direction portion.

Further, it is preferable that the one side plate peripheral edge is a small-diameter side peripheral edge and the other side plate peripheral edge is a large-diameter side peripheral edge.

Further, the present invention includes a pair of arc-shaped side plate portions arranged in parallel in the axial direction and columnar portions connecting the both side plate portions, and two separators or segments for holding rolling elements between the columnar portions. In the conical cage retainer configured to be arranged on the circumference of more than one piece and binding the separator or segment with a wire, the separator or segment is in the vicinity of the connection portion between the side plate portion and the columnar portion. A locking protrusion for locking the wire, and the wire is wound around the locking protrusion of the adjacent separator or segment so as to surround the periphery of the rolling element, and the outer periphery of the side plate portion and the columnar portion. It is arranged along the side surface.

Further, the separator or segment may have a configuration in which a stepped portion provided along a peripheral edge of the outer peripheral surface and a guide groove extending in the circumferential direction provided in the stepped portion are formed. Thus, it is possible to prevent the separator from falling off when bound with a wire.

Furthermore, the separator or segment forms an axial groove extending in the axial direction provided in the columnar part, and guides the wire in the axial direction along the columnar part, thereby facilitating the installation of the wire. .

The locking projection may be provided with a locking portion for preventing the wire from dropping off, and the configuration prevents the wire engaged with the locking projection from falling off.

In this invention, the segments can be bundled by arranging the wires on the circumference in the guide groove provided in the step portion along the peripheral edge of the outer peripheral surface. Can be improved. In addition, since the wire is arranged on the surface of the stepped portion having a step with respect to the outer peripheral surface of the segment, there is no contact with other members such as an outer ring, and the wire is cut after assembly. It is easy to work.

Moreover, this invention can remove the wire which binds both periphery by the removal operation | work of one wire by comprising the wire arrange | positioned on the periphery at both side-plate part periphery by one binding wire. In addition, since the binding wire is folded back in the axial direction, an engagement portion is provided at the tip, and an intermediate portion of the wire is engaged with the engagement portion, whereby the wire can be configured by one binding wire.

In addition, the present invention prevents the tapered roller from falling off by hooking a wire to a locking projection provided in the vicinity of the connecting portion between the side plate portion and the columnar portion of the separator or segment and placing it on the outer peripheral surface side of the cage. In addition, the wire can be easily placed and removed by cutting the wire after assembly. In addition, by configuring the wire to be wound around the protrusion provided on the outer peripheral surface of the separator or the like so as to surround the tapered roller, a plurality of wires are arranged to overlap along the side plate portion and the columnar portion. Even thin wires can withstand the weight of separators and tapered rollers.

Furthermore, since the wire is removed after assembly, since each of the separators and the like is not subjected to a tensile load, it is possible to insert a tapered roller to the maximum, and it is possible to design a high load capacity of the tapered roller bearing.

It is sectional drawing of the tapered roller bearing of 1st Embodiment of this invention. It is a perspective view of the state which removed the outer ring | wheel of the tapered roller bearing of FIG. It is a perspective view which shows the state which decomposed | disassembled some segments of the tapered roller bearing of FIG. It is a perspective view which shows the structure of the segment used for the tapered roller bearing of FIG. FIG. 5 is a cross-sectional view taken along line VV of the segment in FIG. 4. It is a perspective view which shows the state which winds a wire around the segment arrange | positioned on the circumference. It is a partial expansion perspective view which shows the fixed state of a wire. It is the partial expansion perspective view which looked at the fixed state of the wire from another angle. It is a figure which shows the structure of the wire used for the assembly of the retainer of the tapered roller bearing of 2nd Embodiment of this invention. FIG. 10 is a partially enlarged perspective view showing a state in which the wire of FIG. 9 is used and the wire is wound around a segment arranged on the circumference. It is the elements on larger scale which looked at the state in which the wire in 2nd Embodiment of this invention was wound from another angle. It is a partial expansion perspective view which shows typically the structure of the fixing member which fixes the wire in 2nd Embodiment of this invention. It is a perspective view which shows the attachment process of the wire in 2nd Embodiment of this invention. It is a perspective view which shows the attachment process of the wire following FIG. It is sectional drawing of the tapered roller bearing of 3rd Embodiment of this invention. It is a perspective view of the state which removed the outer ring | wheel of the tapered roller bearing of FIG. It is a perspective view which shows the state which decomposed | disassembled some segments of the tapered roller bearing of FIG. It is a perspective view which shows the structure of the segment used for the tapered roller bearing of FIG. It is sectional drawing in the VV line of the segment of FIG. It is sectional drawing in the VI-VI line of the segment of FIG. It is a perspective view which shows the structure of the segment which concerns on 4th Embodiment of this invention. It is a perspective view which shows the structure of the segment which concerns on the modification of FIG. It is a partial expansion perspective view which shows the state which wound the wire around the segment arrange | positioned at the circumference of the tapered roller bearing of FIG. It is the partial expansion disassembled perspective view which extracted only the wire of the tapered roller bearing of FIG. FIG. 16 is a partially enlarged perspective view showing a state in which a wire is wound around a circumferentially arranged segment of the tapered roller bearing of FIG. 15 by another procedure. It is the partial expansion disassembled perspective view which extracted only the wire of the tapered roller bearing of FIG. It is a schematic diagram explaining the assembly process of the tapered roller bearing using the conventional split type cage.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a cross-sectional view of a large tapered roller bearing used for supporting a main shaft or the like of wind power generation, and FIG. 2 is a perspective view of the tapered roller bearing with an outer ring removed. FIG. 3 is a perspective view showing a state in which some segments of the tapered roller bearing are disassembled.

This tapered roller bearing 1 is a split type comprising an inner ring 11, an outer ring 12, a number of tapered rollers 15 interposed between these raceway surfaces 13 and 14, and a pocket 16 for holding the tapered rollers 15 at regular intervals. The cage 17 is a main component.

In the case of a large tapered roller bearing used for supporting a main shaft or the like of wind power generation, the average diameter of the tapered roller 15 is 40 mm or more and the outer diameter of the bearing is 1 m or more.

A small collar portion 18 is formed on the small diameter side of the raceway surface 13 of the inner ring 11, and a large collar portion 19 is formed on the large diameter side, respectively, and the rolling of the tapered roller 15 is guided by both of these

collar portions

18, 19. .

2 and 3, the retainer 17 is configured by arranging a plurality of segments 20 that are divided in a circumferential direction into a ring shape. The segment 20 constituting the split type retainer has a shape obtained by equally dividing a truncated cone-shaped cage retainer by a split surface including the center line thereof. By combining the segments 20 in an annular shape, a truncated cone-shaped cage-type cage 17 having a small-diameter end face 21 at one end in the axial direction and a large-diameter end face 22 at the other end is formed.

FIG. 4 is a perspective view showing the configuration of the segments used in the tapered roller bearing. FIG. 5 is a cross-sectional view taken along line VV in FIG. The segment 20 is made of metal or resin, and has a shape in which arc-shaped side plate parts 23 obtained by dividing the ring in the circumferential direction are arranged in parallel in the axial direction, and columnar parts 24 connect both side plate parts 23. It is. As the resin material, general-purpose resins, engineering plastics such as PTFE and polyimide, and composite materials containing these as main components can be used.

In this first embodiment, as shown in FIG. 4, one columnar portion 24 is provided in one segment, and two segments 20 are abutted to each other to store a tapered roller between the columnar portions 24. 16 is formed. An arcuate roller guide surface 16a and a convex portion 16b for preventing the tapered roller 15 from falling off are provided above the guide surface 16a on the opposing surface of the adjacent columnar portions 24.

As shown in FIG. 3, when the tapered roller 15 is press-fitted into the pocket 16 of the cage 17 from the outer diameter side toward the inner diameter side, the tapered roller 15 is fitted into the pocket so as to be rotatable about the axis.

The plurality of segments 20 arranged on the circumference are bound together by

wires

25a and 25b as shown in FIG. As shown in FIGS. 4 and 5, the segment 20 is provided with

guide grooves

26 and 27 for winding the

wires

25 a and 25 b.

The

guide grooves

26 and 27 are provided on the

surfaces

28a and 29a of the

step portions

28 and 29 provided on the outer peripheral surface peripheral edge 23a of both the large diameter side and the small diameter side of the side plate portion 23 of the segment. The

guide grooves

26 and 27 are configured to have a groove width that can guide the

wires

25a and 25b. Further, in the vicinity of the guide groove, as will be described later, a wire engaging protrusion or the like may be provided at an arbitrary position so that the wire can be folded back in the axial direction.

The

step portions

28 and 29 provided with the

guide grooves

26 and 27 are provided over the entire length of the side plate portion 23 of the segment so as to be lower than the outer peripheral surface 20a of the segment 20. The height H and the protrusion amount D of the step between the

surfaces

28a and 29a of the

step portions

28 and 29 and the outer peripheral surface 20a of the segment 20 are not particularly limited, but the

wires

25a and 25b described above are wound around What is necessary is just to be able to accommodate both ends of 25a and 25b or a fixture used for fixing the

wires

25a and 25b between the raceway surface 14 of the outer ring 12.

Further, the columnar portion 24 is provided with an axial groove 30 extending in the axial direction of the segment 20. As will be described later, the axial groove 30 is for guiding the

wires

25a and 25b arranged around the guide groove on one side plate portion 23 side to the other side plate portion 23 side. It is configured wider than. The groove depth of the axial groove 30 is configured such that the groove bottom 30a is slightly higher than the surface 28a of the step part 28 on the small diameter side. When the

wires

25a and 25b are disposed in the

guide grooves

26 and 27, the

wires

25a and 25b are hooked on the side wall 30b of the axial groove 30 so as to be easily folded back into the axial groove. In order to return the

wires

25a and 25b, a protrusion for hooking the

wires

25a and 25b may be provided in the vicinity of the end of the axial groove 30.

FIG. 6 is a perspective view showing a state in which the

wires

25a and 25b are wound around the circumferentially arranged segments of the tapered roller bearing of FIG. The

wires

25a and 25b are provided on the

step portions

28 and 29 on both the small diameter side and the large diameter side, respectively, and along the

guide grooves

26 and 27 provided on the

surfaces

28a and 29a, all of the cage 17 is provided. Circumferentially arranged around the circumference. The wire 25 has a strength sufficient to bind the segments and prevent the segment 20 and the tapered rollers 15 arranged on the circumference around the raceway surface 13 of the inner ring 11 from falling off during assembly. .

The

wires

25a and 25b are configured to have such a length that the entire circumferences of the

guide grooves

26 and 27 on the inner diameter side and the outer side can be wound, and both ends are fixed by an arbitrary fixing means to bind the segments 20 together. 7 and 8 are partially enlarged perspective views showing a fixed state of the wire. In the present embodiment, fixing

members

31a and 31b for fixing the vicinity 25s of the ends of the

wires

25a and 25b are used as means for fixing the

wires

25a and 25b. As examples of the fixing

members

31a and 31b, those that can fix the

wires

25a and 25b by means of caulking, clips, screwing, or the like are widely used.

In addition, as a means for fixing the

wires

25a and 25b, another fixing jig such as welding or binding may not be used. Further, the strength of bundling the segments 20 by the

wires

25a and 25b may be such that the segments 20 can be prevented from falling off during assembly, and some play may be given to each segment 20.

The

wires

25a and 25b are preferably fixed in a state of being drawn out to the large diameter side or the small diameter side in order to be removed from the

guide grooves

26 and 27 by cutting after assembly as will be described later. In the first embodiment, both the

wires

25a and 25b are fixed so that both ends are drawn out to the large diameter side, and the

wires

25a and 25b are cut from the large diameter side after assembling, as will be described later.

The tapered roller bearing 1 according to the first embodiment has the above-described configuration. When the tapered roller bearing 1 is incorporated into the apparatus, the shaft roller is vertically oriented and the trapezoid side is disposed at a lower position around the raceway surface 13 of the inner ring 11. A predetermined number of segments 20 are arranged in a ring shape. At this time, the tapered roller 15 may be incorporated into the pocket 16 defined by the two adjacent segments 20.

After the arrangement of all the segments 20 is completed, the

wires

25a and 25b are arranged in a circular shape in the guide groove 26 provided in the step portion 28 on the small diameter side and the guide groove 27 provided in the step portion 29 on the large diameter side. The segments 20 are wound around and bound to prevent the segment 20 from being displaced on the large diameter side and the small diameter side.

The small-diameter-side wire 25a is guided by the small-diameter-side guide groove 26 and wound around the circumference, and then the vicinity of both end portions is folded back in the axial direction, and both end portions are bundled to be provided in an arbitrary columnar portion 24. It is sent out to the large diameter side through the axial groove 30 and fixed on the large diameter side. On the other hand, the large-diameter side wire 25b is guided around the guide groove 27 and is wound around the circumference, and then both ends are fixed.

Thereafter, the outer ring 12 is fitted around the tapered roller 15. At this time, the inner ring assembly composed of the inner ring 11, the tapered roller 15 and the cage 17 may be reversed as necessary, but in this case as well, the segment 20 is bound by the

wires

25a and 25b. Moreover, the tapered roller 15 is prevented from falling off, and the handling property at the time of production can be improved.

組み込み The tapered roller bearing 1 is completely assembled by fitting a housing (not shown) to the outer ring 12 fitted to the inner ring assembly.

In addition, the small diameter side wire 25a and the large diameter side wire 25b are cut at an arbitrary timing after the outer ring 12 of the tapered roller bearing 1 is fitted. As described above, since the small-diameter side wire 25a is drawn out to the large-diameter side through the axial groove, it is removed from the guide groove 27 by being cut and pulled out from the large-diameter side. On the other hand, since the large-diameter side wire 25b exists on the large-diameter side, a cutting tool is inserted into the gap between the large-diameter step portion 29 and the outer peripheral surface of the outer ring, and is removed from the guide groove 26.

Thus, the segments 20 and the tapered rollers 15 can be prevented from falling off when the tapered roller bearing 1 is assembled by binding the segments 20 of the split cage 17 with the

wires

25a and 25b. Further, since the

wires

25a and 25b are arranged on the

surfaces

28a and 29a of the

step portions

28 and 29 having a step with respect to the outer peripheral surface of the segment 20, they are in contact with other members such as the outer ring 12. In addition, the work is easy even when the

wires

25a and 25b are cut during assembly.

In the first embodiment, the example in which the

wires

25a and 25b are arranged on both the large-diameter side and the small-diameter side has been described. However, in the present invention, a step is provided on at least one peripheral side, and the step is provided on the step. The present invention can also be applied to a configuration in which the segments 20 are bundled by winding a wire around the guide groove. Moreover, although the case where the

wires

25a and 25b are removed after the tapered roller bearing 1 is assembled is described, the operation may be performed with the

wires

25a and 25b being provided.

Next, FIG. 9 shows a wire 25 used in the second embodiment of the present invention. The wire 25 includes a bundling wire portion 25d having an annular portion 25c as an example of an engaging portion at the tip, and a drawing wire portion 25e fixed to the annular portion 25c. The binding wire portion 25d is wound around the segment 20 and is a wire for binding the segment on the circumference. As will be described later, the entire circumference of the

guide grooves

26 and 27 on the inner diameter side and the outer shape side is wound. It is configured to be long enough. The binding wire portion 25d has a strength that binds the segments 20 and has a strength that can prevent the segments 20 and rollers 15 arranged on the circumference around the raceway surface 13 of the inner ring 11 from falling off during assembly. As the material, a metal, a synthetic resin, or the like can be preferably used.

The annular portion 25c provided at the tip of the binding wire portion 25d is for inserting the other end side of the binding wire portion 25d and engaging and folding the binding wire portion 25d as described later. The annular portion 25c may be formed of a member different from the binding wire portion 25d, or the binding wire portion 25d may be processed so that the tip is annular. The annular portion 25c has flexibility, and it is preferable that the annular portion 25c bends long and narrow when the other end side of the binding wire portion 25d is inserted and folded, as will be described later.

10 and 11 are partially enlarged perspective views showing a state in which the wire 25 is wound around the circumferentially arranged segments of the tapered roller bearing 1 of FIG. As shown in FIG. 10, the wire 25 includes a small-diameter side circumferential portion 36 and a large-diameter side circumferential portion 37 in which the binding wire portion 25 d is provided circumferentially along the peripheral edges on the small-diameter side and the large-diameter side, It arrange | positions so that the axial direction part 38 extended in an axial direction along the columnar part 24 of arbitrary segments 20 may be comprised. Here, the small diameter side circumferential portion 36 corresponds to the first circumferential portion in the present invention, and the large diameter side circumferential portion 37 corresponds to the second circumferential portion in the present invention.

Further, the drawing wire portion 25e of the wire 25 is disposed so as to extend in the axial direction on the columnar portion 24 of the segment 20 where the axial direction portion 38 is disposed.

The small-diameter side circumferential portion 36 is provided along the small-diameter side guide groove 26 starting from the annular portion 25c provided at the tip, and is fixed in an annular shape by inserting the other end of the binding wire portion 25d into the annular portion 25c. Is done. The axial portion 38 is formed by folding the annular portion 25c of the binding wire portion 25d to the annular portion 25c so that the portion is folded back in the axial direction.

The large-diameter side circumferential portion 37 has a rear end of the axial direction portion 38 folded back in the circumferential direction at the position of the large-diameter side guide groove 27 and is arranged circumferentially along the large-diameter side guide groove 27. The As described above, since the groove depth of the axial groove 30 is configured such that the groove bottom 30a is slightly higher than the

surfaces

28a and 29a of the

step portions

28 and 29, the binding wire portion 25d is used as the guide groove 27. When arranging, the binding wire portion 25d is hooked on the side wall 30b of the axial groove 30 so that the axial groove is easily folded back.

The rear end of the binding wire portion 25d is fixed to the folded portion of the large-diameter circumferential portion 37 by an arbitrary fixing means. In the second embodiment, as a means for fixing the binding wire portion 25d, a fixing member 34 for fixing the vicinity 25s of the end portion of the binding wire portion 25d is used.

As shown in FIG. 12, the fixing member 34 is provided with a groove 34b for guiding the binding wire portion 25d in parallel on the opposing surface of the two plate-like main bodies 34a, and sandwiches the binding wire portion 25d by the plate-like main body 34a. Thus, the binding wire portion 25d is fixed in an annular shape. As a method for fixing the two plate-like main bodies 34a, for example, means such as caulking, clip, screwing, etc. can be used.

The means for fixing the binding wire portion 25d is not limited to the above configuration, and means that does not use a fixing member such as welding may be employed. Further, the strength of bundling the segments 20 by the bundling wire portion 25d may be such that the segments 20 can be prevented from falling off during assembly, and some play may be given to each segment 20.

The extraction wire portion 25e is connected to the annular portion 25c and has a length equal to or longer than the axial dimension of the tapered roller bearing 1. The drawing wire portion 25e is used for removing the wire 25 by pulling the drawing wire portion 25e after releasing the fixation of the binding wire portion 25d by a method such as cutting after the tapered roller bearing 1 is assembled. For this reason, it is preferable that the extraction wire part 25e is fixed in the state pulled out to the large diameter side or the small diameter side. In the second embodiment, the drawing wire portion 25e is drawn to the large diameter side. In addition, the drawing wire part 25e does not need to be comprised with the same wire as the binding wire part 25d, for example, may be comprised with members, such as a nylon thread | yarn.

The tapered roller bearing 1 according to the second embodiment has the above-described configuration. When the tapered roller bearing 1 is incorporated in the apparatus, the raceway surface 13 of the inner ring 11 is arranged so that the shaft is vertically oriented and the trapezoid side is lower. Around the circumference, a predetermined number of segments 20 are arranged in an annular shape, and the tapered rollers 15 are incorporated into pockets 16 defined by two adjacent segments 20.

After the arrangement of all the segments 20 is completed, the segments 20 are bundled using the wire member 35. Specifically, as shown in FIG. 13, first, the annular portion 25c provided at the tip of the binding wire portion 25d is disposed in the guide groove 26 provided in the surface 28a of the step portion 28 on the small diameter side. At this time, it is preferable to match with a position where an arbitrary axial groove 30 is provided. Next, while fixing the annular portion 25c, the binding wire portion 25d is wound around the guide groove 26 on the small diameter side in a circumferential shape.

As shown in FIG. 14, the other end side of the binding wire portion 25d is inserted through the annular portion 25c and engaged, and after fixing the small-diameter circumferential portion 36, the other end side is folded back to the large-diameter side. Next, the binding wire portion 25d is moved to the large diameter side along the axial groove 30 of the segment 20, the binding wire portion 25d is hooked on the large diameter side wall 30b of the axial groove 30, and the axial portion 33 is moved. Form.

Further, after the binding wire portion 25d is wound around the large-diameter side guide groove 27 in a circumferential shape, the binding wire portion 25d is cut into an appropriate length, and the large-diameter-side circumferential portion 32 is fixed by the fixing member 34. Is fixed (FIG. 10).

Thus, the binding wire portion 25d is wound around the circumference and the segments 20 are bound to prevent the segments 20 from being displaced on the large diameter side and the small diameter side.

The drawing wire portion 25e connected to the annular portion 25c is sent out to the large diameter side along the axial groove 30 in which the axial portion 33 is disposed.

Thereafter, the outer ring 12 is fitted around the tapered roller 15. At this time, the inner ring assembly composed of the inner ring 11, the tapered roller 15 and the cage 17 may be reversed as necessary, but even in this case, the segment 20 is bound by the binding wire portion 25d. Moreover, the tapered roller 15 is prevented from falling off, and the handling property at the time of production can be improved.

Note that, at an arbitrary timing after the outer ring 12 of the tapered roller bearing 1 is fitted, the binding of the second circumferential portion is released by cutting the binding wire portion 25d. As described above, since the drawing wire portion 25e is drawn to the large diameter side through the axial groove 30, the annular portion 25c is pulled and removed in the axial direction by drawing from the large diameter side. The binding wire portion 25d is removed from the

guide grooves

26 and 27 as the annular portion 25c is pulled.

Thus, the segment 20 and the tapered roller 15 are prevented from falling off when the tapered roller bearing is assembled by binding the peripheral edges on the large diameter side and the small diameter side of the segment 20 of the split cage 17 with the binding wire portion 25d. Can do. Further, since the binding wire portion 25d is disposed on the

surfaces

28a and 29a of the

step portions

28 and 29 having a step with respect to the outer peripheral surface of the segment 20, it is in contact with other members such as the outer ring 12. In addition, the work is easy even when the wire is cut after assembly.

Furthermore, the wire 25 after assembling can be easily removed by the drawing wire portion 25e.

In addition, although the above 2nd Embodiment described the example which has arrange | positioned the binding wire part 25d from the small diameter side, and arrange | positioned the 1st circumferential part on the small diameter side and the 2nd circumferential part on the large diameter side, The second embodiment can also be applied to a configuration in which the first circumferential portion is arranged on the large diameter side and the wire member is pulled out from the small diameter side. Further, the annular portion 25c of the wire 25 as an example of the engaging portion may not be annular, as long as it can be folded back in the axial direction by engaging the binding wire portion 25d. It is also possible to use a member such as.
Next, a third embodiment of the present invention will be described with reference to FIGS. In the description of the third embodiment, parts common to the first embodiment are denoted by the same reference numerals as in the second embodiment.

FIG. 15 is a cross-sectional view of a large tapered roller bearing used for supporting a main shaft or the like of wind power generation, and FIG. 16 is a perspective view of the tapered roller bearing 1 with an outer ring removed.

The retainer 17 is configured by annularly arranging segments 20 divided into a plurality in the circumferential direction, as shown in FIGS. 16 and 17.

FIG. 18 is a perspective view showing the configuration of the segments used in the tapered roller bearing. 19 is a cross-sectional view taken along line VV in FIG. 18, and FIG. 20 is a cross-sectional view taken along line VI-VI of the segment shown in FIG.

In the third embodiment, the locking

projections

41 and 42 for hooking the wire 25 are provided in the vicinity of the connection portion between the side plate portion and the columnar portion for folding the wire 25.

The locking

projections

41 and 42 are provided on the outer peripheral surface side in the vicinity of the end of the columnar portion 24 so as to be sandwiched between the pair of axial grooves 30. In the present embodiment, the locking

projections

41 and 42 have a cylindrical shape with a height T. The locking

protrusions

41 and 42 are configured such that the wire 25 is wound around the wire 25 and the wire 25 is not easily dropped when the segments are bound by the wire 25 described later.

In order to more reliably prevent the wire 25 from falling off, the locking

projections

41 and 42 may have a locking portion 43 for preventing falling off at the tip as shown in FIG. The drop-off prevention locking portion 43 is configured by increasing the diameter of the distal end portion, and prevents the wound wire 25 from falling off from the distal end side.

Note that the locking

protrusions

41 and 42 may be configured to protrude in the axial direction as shown in FIG.

FIG. 23 is a partially enlarged perspective view showing a state where the wire 25 is wound around the circumferentially arranged segments of the tapered roller bearing of FIG. 24 is a partially enlarged exploded perspective view in which only the wire 25 of the tapered roller bearing of FIG. 23 is extracted. As shown in FIG. 23, the wires 25 are arranged along the peripheral edges 20 a of the small diameter side and the large diameter side of the segment 20 and the columnar part 24.

The wire 25 is wound around the locking

projections

41 and 42 of the adjacent segments, and is disposed along the outer peripheral side surfaces of the side plate portion 23 and the columnar portion 24 so as to surround the periphery of each roller 15. This will be specifically described below.

In FIG. 23, in order to clarify the position of each segment 20 and the tapered roller 15, a branch number is attached and distinguished. Specifically, in FIG. 23, the roller 15 provided on the uppermost side in the drawing is the 0th roller 15-0, and hereinafter, the first roller 15-1 and the second roller 5-2 are shown clockwise in the drawing. To distinguish on the sign. In addition, the segment located between the 0th roller 15-0 and the first roller 15-1 is the 0th segment 20-0, and the locking projection provided on the 0th segment is the 0th locking projection. 41-0 (protrusion on the large diameter side) and 42-0 (protrusion on the small diameter side). Hereinafter, the first segment 20-1, the second segment 20-2,..., The first locking projections 41-1, 41-2, the second locking projections 42-1, 42-2,. To distinguish on the sign. Moreover, although the wire 25 to wind uses only one piece, a branch number is attached | subjected and the site | part of a wire is specified.

The first large-diameter portion 25a-1 of the wire 25 disposed on the large-diameter side periphery of the zeroth roller 15-0 and the first roller 15-1 is the first locking on the large-diameter side of the first segment 20-1. It is latched by the protrusion 41-1 and sent to the small diameter side. The axial portion 25b-1 extending along the columnar portion 24 of the first segment 20-1 is stopped by the first locking projection 42-1 on the small diameter side and is arranged on the small diameter side periphery of the first segment 20-1. The first small diameter portion 25c-1 is arranged.

The first small diameter portion 25c-1 reaches the 0th segment through the small diameter side guide groove of the first segment 20-1, and is locked to the 0th locking projection 42-0 on the small diameter side to be locked to the 0th segment. It is sent along the 20-0 columnar section 24 to the larger diameter side. The axial portion 25d-1 is engaged with the large-diameter-side zero-th engagement protrusion 41-0 and extends along the large-diameter side periphery of the first roller 15-1 and the second roller 15-2. The two segments 20-2 are latched by the second latching protrusion 31-2 on the large diameter side and sent to the small diameter side. Hereinafter, the axial portion 25b-2 extending along the columnar portion of the second segment 20-2, the second small-diameter portion 25c-2, and the axial portion 25d-2 are continued. That is, in the example of FIG. 23, the wires 25 are arranged so as to surround the tapered rollers 15 one by one.

The wires 25 wound as described above are arranged in all the segments 20 over the entire circumference, thereby binding the segments 20 together. With this configuration, the segments 20 can be bundled over the entire circumference with a single wire 25.

Note that, as described above, in the example shown in FIG. 23, the

grooves

26, 27, and 30 are provided in the large-diameter side, the small-diameter side peripheral edge, and the columnar part, respectively, to guide the wire arranged in the part. Moreover, the wire 25 is hooked on the side wall of each groove, and the wire is easily folded back.

Note that the rear end of the wire 25 is fixed to the tip portion of the wire existing at the position by an arbitrary fixing means. In this embodiment, a terminal caulking portion (not shown) formed by covering a soft metal cylinder is used as a means for fixing the wire 25. As another example of the fixing means, means such as a clip and screwing can be used.

The means for fixing the wire 25 is not limited to the above-described configuration, and means that does not use a fixing member such as welding may be adopted. Further, the strength of binding of the segments 20 by the wires 25 may be such that the segments 20 can be prevented from falling off during assembly, and some play may be given to each segment 20.

The wire 25 is removed by releasing the fixing of the wire 25 by a method such as cutting after assembling the roller bearing. For this reason, it is preferable that the edge part of the wire 25 is fixed in the state pulled by the large diameter side or the small diameter side. In this embodiment, since the wire 25 is wound from the large diameter side, it is pulled out to the large diameter side.

FIG. 25 is a partially enlarged perspective view showing a state in which the wire is wound around the circumferentially arranged segments of the tapered roller bearing of FIG. 15 by another procedure. FIG. 26 is a partially enlarged exploded perspective view in which only the wire of the tapered roller bearing of FIG. 25 is extracted.

In the fourth embodiment of the present invention shown in FIGS. 25 and 26, the wires 25 are arranged so as to surround two rollers 15 one by one, and the wires 25 are shifted over the entire circumference by shifting one roller at a time. In the point which winds 25, it differs from embodiment shown in FIG.

The tapered roller bearing 1 according to the third and fourth embodiments has the above-described configuration. When the tapered roller bearing 1 is incorporated in the apparatus, the raceway surface of the inner ring 11 is arranged so that the shaft is vertically oriented and the trapezoid side is lower. A predetermined number of segments 20 are arranged in a ring around 13 and the tapered rollers 15 are incorporated into pockets 16 defined by two adjacent segments 20.

After the arrangement of all the segments 20 is completed, the segments 20 are bundled using the wires 25. As described above with reference to FIG. 23 and FIG. 24, the wire arrangement procedure is performed by engaging the locking

protrusions

41 and 42 so as to surround the tapered rollers 15 one by one to form the side plate portion 23 and the columnar shape of the segment 20. Wind along the outer peripheral surface of the portion 24.

By laying the wire 25 by shifting the rollers 15 one by one in such a procedure, after winding the wire 25 over the entire circumference, the wire 25 is cut to an appropriate length, and the wire 25 is moved by the fixing member. Fix it.

巻き By winding the wire 25 and bundling the segment 20 in this way, the segment 20 is prevented from being displaced on the large diameter side and the small diameter side.

Thereafter, the outer ring 12 is fitted around the tapered roller 15. At this time, the inner ring assembly composed of the inner ring 11, the tapered roller 15 and the cage 17 may be reversed as necessary. However, since the segment 20 is bound by the wire 25 in this case, the segment 20 and the cone It is possible to prevent the rollers 15 from falling off, and to improve handling properties during production.

In addition, at an arbitrary timing after the outer ring 12 of the tapered roller bearing 1 is fitted, the wire 25 is cut and removed by pulling from the large diameter side.

In this way, the segments 20 and the tapered rollers 15 can be prevented from falling off when the tapered roller bearing is assembled by binding the peripheral edges of the large diameter side and the small diameter side of the segment 20 of the split cage 17 with the wire 25. . Moreover, since the wire 25 will be arrange | positioned at the outer peripheral surface of the segment 20, an operation | work is easy also when cut | disconnecting the wire 25 after an assembly.

In addition, although the above embodiment described the example using the segment provided with the

guide grooves

26 and 27 which guide the wire 25, and the axial direction groove | channel 30, this invention is not limited to this segment, The present invention can be widely applied to segments or separators having side plate portions 23 and columnar portions 24 and having locking projections for winding wires in the vicinity of these connecting portions. The procedure for winding the wire is not particularly limited as long as it is arranged along the outer peripheral surface 20a of the side plate portion 23 and the columnar portion 24 so as to surround the rollers.

As mentioned above, although embodiment of this invention was described with reference to drawings, this invention is not limited to the thing of embodiment shown in figure. Various modifications and variations can be made to the illustrated embodiment within the same range or equivalent range as the present invention.

1: bearing 11: inner ring 12: outer ring 13, 14: raceway surface 16: pocket 16a: guide surface 16b: convex portion 17: retainer 18: small brim portion 19: large brim portion 20: segment 20a: outer peripheral surface 21: small diameter Side end face 22: Large-diameter side end face 23: Side plate part 23a: Peripheral peripheral edge 24:

Columnar parts

25, 25a, 25b: Wire 25c: Annular part 25d: Bundling wire part 25e: Pull-out wire part 25s: End vicinity 26, 27 : Guide grooves 28, 29: Stepped

portions

28a, 29a: Surface 30: Axial groove 30a: Groove bottom 30b:

Side walls

31a, 31b: Fixing member 32: Large diameter side circumferential portion 33: Axial portion 34: Fixing member 34a : Plate-shaped main body 34b: Groove 35: Wire member 36: Small diameter side circumferential portion 37: Large diameter side circumferential portion 38: Axial direction portion 41 42: Locking protrusion 43: Locking portion for preventing dropout

Claims

In the cage configured by arranging two or more segments for holding rolling elements on the circumference, the segment includes a stepped portion provided along a peripheral edge of an outer peripheral surface and a circumferential direction provided in the stepped portion. And a guide groove extending along the guide groove, and the adjacent segments are bundled together by wires arranged on the circumference along the guide groove.
The retainer according to claim 1, wherein the step portion provided in the segment is provided at a peripheral edge on both sides of the segment.
The segment has a pair of arc-shaped side plate portions arranged in parallel in the axial direction and a columnar portion connecting the both side plate portions, and an axial groove extending in the axial direction is provided in the columnar portion. The retainer according to claim 1 or 2, characterized by the above.
Two or more separators or segments having a pair of arc-shaped side plate portions arranged in parallel to the axial direction and columnar portions connecting the both side plate portions are arranged on the circumference. In the cage-shaped cage in which the separator or segment is bundled by a wire arranged on the circumference along the circumference, the wire runs along one side plate circumference starting from an engaging portion provided at the tip. A first circumferential portion arranged in a row and an axial direction that is continuous with the first circumferential portion, is engaged with the engaging portion, is folded back in the axial direction, and extends to the other peripheral side through the columnar portion. And a second circumferential portion arranged along the periphery of the other side plate portion, and a retainer.
The retainer according to claim 4, wherein the wire includes a drawing wire portion connected to the engaging portion and disposed along the axial direction portion.
The retainer according to claim 4 or 5, wherein the one side plate peripheral edge is a small-diameter side peripheral edge and the other side plate peripheral edge is a large-diameter side peripheral edge.
The cage according to any one of claims 4 to 6, wherein the engaging portion is formed in an annular shape.
The separator or segment is formed with a guide groove extending along a peripheral edge around which the first circumferential portion and the second circumferential portion are wound, and an axial groove extending along a columnar portion in which the axial direction portion is accommodated. The cage according to any one of claims 4 to 7, wherein the cage is provided.
The holding according to any one of claims 4 to 8, wherein the side plate portion has a step portion provided along a peripheral edge of an outer peripheral surface, and the guide groove is provided in the step portion. vessel.
There are two or more separators or segments on the circumference that have a pair of arc-shaped side plates arranged in parallel to the axial direction and columnar portions that connect the both side plate portions, and hold rolling elements between the columnar portions. In the conical cage-shaped cage that is arranged and configured, and the separator or segment is bound by a wire, the separator or the segment is a member that locks the wire in the vicinity of a connection portion between the side plate portion and the columnar portion. The wire has a stop projection, and the wire is disposed along the outer peripheral surface of the side plate portion and the columnar portion so as to be wound around the engagement protrusion of the adjacent separator or segment and surround the periphery of the rolling element. A cage characterized by being made.
11. The holding according to claim 10, wherein the separator or the segment is formed with a stepped portion provided along a peripheral edge of the outer peripheral surface and a guide groove provided in the stepped portion extending in the circumferential direction. vessel.
The cage according to claim 10 or 11, wherein the separator or the segment is formed with an axial groove extending in an axial direction provided in a columnar part.
The cage according to any one of claims 10 to 12, wherein the locking projection includes a locking portion for preventing the wire from falling off on a distal end side.
The cage according to any one of claims 10 to 13, wherein the wires are wound so as to surround the rolling elements one by one.
The cage according to any one of claims 10 to 13, wherein the wire is wound so as to surround the rolling elements two by two.
The cage according to any one of claims 1 to 15, wherein the separator or the segment is made of a resin material.